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 (int ix
= 0; ix
< n_comp_units
; ++ix
)
2141 VEC_free (dwarf2_per_cu_ptr
, all_comp_units
[ix
]->imported_symtabs
);
2143 for (int ix
= 0; ix
< n_type_units
; ++ix
)
2144 VEC_free (dwarf2_per_cu_ptr
,
2145 all_type_units
[ix
]->per_cu
.imported_symtabs
);
2146 xfree (all_type_units
);
2148 VEC_free (dwarf2_section_info_def
, types
);
2150 if (dwo_files
!= NULL
)
2151 free_dwo_files (dwo_files
, objfile
);
2152 if (dwp_file
!= NULL
)
2153 gdb_bfd_unref (dwp_file
->dbfd
);
2155 if (dwz_file
!= NULL
&& dwz_file
->dwz_bfd
)
2156 gdb_bfd_unref (dwz_file
->dwz_bfd
);
2158 if (index_table
!= NULL
)
2159 index_table
->~mapped_index ();
2161 /* Everything else should be on the objfile obstack. */
2164 /* See declaration. */
2167 dwarf2_per_objfile::free_cached_comp_units ()
2169 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2170 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2171 while (per_cu
!= NULL
)
2173 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2176 *last_chain
= next_cu
;
2181 /* A helper class that calls free_cached_comp_units on
2184 class free_cached_comp_units
2188 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2189 : m_per_objfile (per_objfile
)
2193 ~free_cached_comp_units ()
2195 m_per_objfile
->free_cached_comp_units ();
2198 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2202 dwarf2_per_objfile
*m_per_objfile
;
2205 /* Try to locate the sections we need for DWARF 2 debugging
2206 information and return true if we have enough to do something.
2207 NAMES points to the dwarf2 section names, or is NULL if the standard
2208 ELF names are used. */
2211 dwarf2_has_info (struct objfile
*objfile
,
2212 const struct dwarf2_debug_sections
*names
)
2214 if (objfile
->flags
& OBJF_READNEVER
)
2217 struct dwarf2_per_objfile
*dwarf2_per_objfile
2218 = get_dwarf2_per_objfile (objfile
);
2220 if (dwarf2_per_objfile
== NULL
)
2222 /* Initialize per-objfile state. */
2224 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2226 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2228 return (!dwarf2_per_objfile
->info
.is_virtual
2229 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2230 && !dwarf2_per_objfile
->abbrev
.is_virtual
2231 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2234 /* Return the containing section of virtual section SECTION. */
2236 static struct dwarf2_section_info
*
2237 get_containing_section (const struct dwarf2_section_info
*section
)
2239 gdb_assert (section
->is_virtual
);
2240 return section
->s
.containing_section
;
2243 /* Return the bfd owner of SECTION. */
2246 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2248 if (section
->is_virtual
)
2250 section
= get_containing_section (section
);
2251 gdb_assert (!section
->is_virtual
);
2253 return section
->s
.section
->owner
;
2256 /* Return the bfd section of SECTION.
2257 Returns NULL if the section is not present. */
2260 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2262 if (section
->is_virtual
)
2264 section
= get_containing_section (section
);
2265 gdb_assert (!section
->is_virtual
);
2267 return section
->s
.section
;
2270 /* Return the name of SECTION. */
2273 get_section_name (const struct dwarf2_section_info
*section
)
2275 asection
*sectp
= get_section_bfd_section (section
);
2277 gdb_assert (sectp
!= NULL
);
2278 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2281 /* Return the name of the file SECTION is in. */
2284 get_section_file_name (const struct dwarf2_section_info
*section
)
2286 bfd
*abfd
= get_section_bfd_owner (section
);
2288 return bfd_get_filename (abfd
);
2291 /* Return the id of SECTION.
2292 Returns 0 if SECTION doesn't exist. */
2295 get_section_id (const struct dwarf2_section_info
*section
)
2297 asection
*sectp
= get_section_bfd_section (section
);
2304 /* Return the flags of SECTION.
2305 SECTION (or containing section if this is a virtual section) must exist. */
2308 get_section_flags (const struct dwarf2_section_info
*section
)
2310 asection
*sectp
= get_section_bfd_section (section
);
2312 gdb_assert (sectp
!= NULL
);
2313 return bfd_get_section_flags (sectp
->owner
, sectp
);
2316 /* When loading sections, we look either for uncompressed section or for
2317 compressed section names. */
2320 section_is_p (const char *section_name
,
2321 const struct dwarf2_section_names
*names
)
2323 if (names
->normal
!= NULL
2324 && strcmp (section_name
, names
->normal
) == 0)
2326 if (names
->compressed
!= NULL
2327 && strcmp (section_name
, names
->compressed
) == 0)
2332 /* See declaration. */
2335 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2336 const dwarf2_debug_sections
&names
)
2338 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2340 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2343 else if (section_is_p (sectp
->name
, &names
.info
))
2345 this->info
.s
.section
= sectp
;
2346 this->info
.size
= bfd_get_section_size (sectp
);
2348 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2350 this->abbrev
.s
.section
= sectp
;
2351 this->abbrev
.size
= bfd_get_section_size (sectp
);
2353 else if (section_is_p (sectp
->name
, &names
.line
))
2355 this->line
.s
.section
= sectp
;
2356 this->line
.size
= bfd_get_section_size (sectp
);
2358 else if (section_is_p (sectp
->name
, &names
.loc
))
2360 this->loc
.s
.section
= sectp
;
2361 this->loc
.size
= bfd_get_section_size (sectp
);
2363 else if (section_is_p (sectp
->name
, &names
.loclists
))
2365 this->loclists
.s
.section
= sectp
;
2366 this->loclists
.size
= bfd_get_section_size (sectp
);
2368 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2370 this->macinfo
.s
.section
= sectp
;
2371 this->macinfo
.size
= bfd_get_section_size (sectp
);
2373 else if (section_is_p (sectp
->name
, &names
.macro
))
2375 this->macro
.s
.section
= sectp
;
2376 this->macro
.size
= bfd_get_section_size (sectp
);
2378 else if (section_is_p (sectp
->name
, &names
.str
))
2380 this->str
.s
.section
= sectp
;
2381 this->str
.size
= bfd_get_section_size (sectp
);
2383 else if (section_is_p (sectp
->name
, &names
.line_str
))
2385 this->line_str
.s
.section
= sectp
;
2386 this->line_str
.size
= bfd_get_section_size (sectp
);
2388 else if (section_is_p (sectp
->name
, &names
.addr
))
2390 this->addr
.s
.section
= sectp
;
2391 this->addr
.size
= bfd_get_section_size (sectp
);
2393 else if (section_is_p (sectp
->name
, &names
.frame
))
2395 this->frame
.s
.section
= sectp
;
2396 this->frame
.size
= bfd_get_section_size (sectp
);
2398 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2400 this->eh_frame
.s
.section
= sectp
;
2401 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2403 else if (section_is_p (sectp
->name
, &names
.ranges
))
2405 this->ranges
.s
.section
= sectp
;
2406 this->ranges
.size
= bfd_get_section_size (sectp
);
2408 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2410 this->rnglists
.s
.section
= sectp
;
2411 this->rnglists
.size
= bfd_get_section_size (sectp
);
2413 else if (section_is_p (sectp
->name
, &names
.types
))
2415 struct dwarf2_section_info type_section
;
2417 memset (&type_section
, 0, sizeof (type_section
));
2418 type_section
.s
.section
= sectp
;
2419 type_section
.size
= bfd_get_section_size (sectp
);
2421 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2424 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2426 this->gdb_index
.s
.section
= sectp
;
2427 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2429 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2431 this->debug_names
.s
.section
= sectp
;
2432 this->debug_names
.size
= bfd_get_section_size (sectp
);
2434 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2436 this->debug_aranges
.s
.section
= sectp
;
2437 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2440 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2441 && bfd_section_vma (abfd
, sectp
) == 0)
2442 this->has_section_at_zero
= true;
2445 /* A helper function that decides whether a section is empty,
2449 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2451 if (section
->is_virtual
)
2452 return section
->size
== 0;
2453 return section
->s
.section
== NULL
|| section
->size
== 0;
2456 /* See dwarf2read.h. */
2459 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2463 gdb_byte
*buf
, *retbuf
;
2467 info
->buffer
= NULL
;
2470 if (dwarf2_section_empty_p (info
))
2473 sectp
= get_section_bfd_section (info
);
2475 /* If this is a virtual section we need to read in the real one first. */
2476 if (info
->is_virtual
)
2478 struct dwarf2_section_info
*containing_section
=
2479 get_containing_section (info
);
2481 gdb_assert (sectp
!= NULL
);
2482 if ((sectp
->flags
& SEC_RELOC
) != 0)
2484 error (_("Dwarf Error: DWP format V2 with relocations is not"
2485 " supported in section %s [in module %s]"),
2486 get_section_name (info
), get_section_file_name (info
));
2488 dwarf2_read_section (objfile
, containing_section
);
2489 /* Other code should have already caught virtual sections that don't
2491 gdb_assert (info
->virtual_offset
+ info
->size
2492 <= containing_section
->size
);
2493 /* If the real section is empty or there was a problem reading the
2494 section we shouldn't get here. */
2495 gdb_assert (containing_section
->buffer
!= NULL
);
2496 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2500 /* If the section has relocations, we must read it ourselves.
2501 Otherwise we attach it to the BFD. */
2502 if ((sectp
->flags
& SEC_RELOC
) == 0)
2504 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2508 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2511 /* When debugging .o files, we may need to apply relocations; see
2512 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2513 We never compress sections in .o files, so we only need to
2514 try this when the section is not compressed. */
2515 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2518 info
->buffer
= retbuf
;
2522 abfd
= get_section_bfd_owner (info
);
2523 gdb_assert (abfd
!= NULL
);
2525 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2526 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2528 error (_("Dwarf Error: Can't read DWARF data"
2529 " in section %s [in module %s]"),
2530 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2534 /* A helper function that returns the size of a section in a safe way.
2535 If you are positive that the section has been read before using the
2536 size, then it is safe to refer to the dwarf2_section_info object's
2537 "size" field directly. In other cases, you must call this
2538 function, because for compressed sections the size field is not set
2539 correctly until the section has been read. */
2541 static bfd_size_type
2542 dwarf2_section_size (struct objfile
*objfile
,
2543 struct dwarf2_section_info
*info
)
2546 dwarf2_read_section (objfile
, info
);
2550 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2554 dwarf2_get_section_info (struct objfile
*objfile
,
2555 enum dwarf2_section_enum sect
,
2556 asection
**sectp
, const gdb_byte
**bufp
,
2557 bfd_size_type
*sizep
)
2559 struct dwarf2_per_objfile
*data
2560 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2561 dwarf2_objfile_data_key
);
2562 struct dwarf2_section_info
*info
;
2564 /* We may see an objfile without any DWARF, in which case we just
2575 case DWARF2_DEBUG_FRAME
:
2576 info
= &data
->frame
;
2578 case DWARF2_EH_FRAME
:
2579 info
= &data
->eh_frame
;
2582 gdb_assert_not_reached ("unexpected section");
2585 dwarf2_read_section (objfile
, info
);
2587 *sectp
= get_section_bfd_section (info
);
2588 *bufp
= info
->buffer
;
2589 *sizep
= info
->size
;
2592 /* A helper function to find the sections for a .dwz file. */
2595 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2597 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2599 /* Note that we only support the standard ELF names, because .dwz
2600 is ELF-only (at the time of writing). */
2601 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2603 dwz_file
->abbrev
.s
.section
= sectp
;
2604 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2606 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2608 dwz_file
->info
.s
.section
= sectp
;
2609 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2611 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2613 dwz_file
->str
.s
.section
= sectp
;
2614 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2616 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2618 dwz_file
->line
.s
.section
= sectp
;
2619 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2621 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2623 dwz_file
->macro
.s
.section
= sectp
;
2624 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2626 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2628 dwz_file
->gdb_index
.s
.section
= sectp
;
2629 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2631 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2633 dwz_file
->debug_names
.s
.section
= sectp
;
2634 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2638 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2639 there is no .gnu_debugaltlink section in the file. Error if there
2640 is such a section but the file cannot be found. */
2642 static struct dwz_file
*
2643 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2645 const char *filename
;
2646 struct dwz_file
*result
;
2647 bfd_size_type buildid_len_arg
;
2651 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2652 return dwarf2_per_objfile
->dwz_file
;
2654 bfd_set_error (bfd_error_no_error
);
2655 gdb::unique_xmalloc_ptr
<char> data
2656 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2657 &buildid_len_arg
, &buildid
));
2660 if (bfd_get_error () == bfd_error_no_error
)
2662 error (_("could not read '.gnu_debugaltlink' section: %s"),
2663 bfd_errmsg (bfd_get_error ()));
2666 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2668 buildid_len
= (size_t) buildid_len_arg
;
2670 filename
= data
.get ();
2672 std::string abs_storage
;
2673 if (!IS_ABSOLUTE_PATH (filename
))
2675 gdb::unique_xmalloc_ptr
<char> abs
2676 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2678 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2679 filename
= abs_storage
.c_str ();
2682 /* First try the file name given in the section. If that doesn't
2683 work, try to use the build-id instead. */
2684 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2685 if (dwz_bfd
!= NULL
)
2687 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2691 if (dwz_bfd
== NULL
)
2692 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2694 if (dwz_bfd
== NULL
)
2695 error (_("could not find '.gnu_debugaltlink' file for %s"),
2696 objfile_name (dwarf2_per_objfile
->objfile
));
2698 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2700 result
->dwz_bfd
= dwz_bfd
.release ();
2702 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2704 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2705 dwarf2_per_objfile
->dwz_file
= result
;
2709 /* DWARF quick_symbols_functions support. */
2711 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2712 unique line tables, so we maintain a separate table of all .debug_line
2713 derived entries to support the sharing.
2714 All the quick functions need is the list of file names. We discard the
2715 line_header when we're done and don't need to record it here. */
2716 struct quick_file_names
2718 /* The data used to construct the hash key. */
2719 struct stmt_list_hash hash
;
2721 /* The number of entries in file_names, real_names. */
2722 unsigned int num_file_names
;
2724 /* The file names from the line table, after being run through
2726 const char **file_names
;
2728 /* The file names from the line table after being run through
2729 gdb_realpath. These are computed lazily. */
2730 const char **real_names
;
2733 /* When using the index (and thus not using psymtabs), each CU has an
2734 object of this type. This is used to hold information needed by
2735 the various "quick" methods. */
2736 struct dwarf2_per_cu_quick_data
2738 /* The file table. This can be NULL if there was no file table
2739 or it's currently not read in.
2740 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2741 struct quick_file_names
*file_names
;
2743 /* The corresponding symbol table. This is NULL if symbols for this
2744 CU have not yet been read. */
2745 struct compunit_symtab
*compunit_symtab
;
2747 /* A temporary mark bit used when iterating over all CUs in
2748 expand_symtabs_matching. */
2749 unsigned int mark
: 1;
2751 /* True if we've tried to read the file table and found there isn't one.
2752 There will be no point in trying to read it again next time. */
2753 unsigned int no_file_data
: 1;
2756 /* Utility hash function for a stmt_list_hash. */
2759 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2763 if (stmt_list_hash
->dwo_unit
!= NULL
)
2764 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2765 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2769 /* Utility equality function for a stmt_list_hash. */
2772 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2773 const struct stmt_list_hash
*rhs
)
2775 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2777 if (lhs
->dwo_unit
!= NULL
2778 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2781 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2784 /* Hash function for a quick_file_names. */
2787 hash_file_name_entry (const void *e
)
2789 const struct quick_file_names
*file_data
2790 = (const struct quick_file_names
*) e
;
2792 return hash_stmt_list_entry (&file_data
->hash
);
2795 /* Equality function for a quick_file_names. */
2798 eq_file_name_entry (const void *a
, const void *b
)
2800 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2801 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2803 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2806 /* Delete function for a quick_file_names. */
2809 delete_file_name_entry (void *e
)
2811 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2814 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2816 xfree ((void*) file_data
->file_names
[i
]);
2817 if (file_data
->real_names
)
2818 xfree ((void*) file_data
->real_names
[i
]);
2821 /* The space for the struct itself lives on objfile_obstack,
2822 so we don't free it here. */
2825 /* Create a quick_file_names hash table. */
2828 create_quick_file_names_table (unsigned int nr_initial_entries
)
2830 return htab_create_alloc (nr_initial_entries
,
2831 hash_file_name_entry
, eq_file_name_entry
,
2832 delete_file_name_entry
, xcalloc
, xfree
);
2835 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2836 have to be created afterwards. You should call age_cached_comp_units after
2837 processing PER_CU->CU. dw2_setup must have been already called. */
2840 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2842 if (per_cu
->is_debug_types
)
2843 load_full_type_unit (per_cu
);
2845 load_full_comp_unit (per_cu
, language_minimal
);
2847 if (per_cu
->cu
== NULL
)
2848 return; /* Dummy CU. */
2850 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2853 /* Read in the symbols for PER_CU. */
2856 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2858 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2860 /* Skip type_unit_groups, reading the type units they contain
2861 is handled elsewhere. */
2862 if (IS_TYPE_UNIT_GROUP (per_cu
))
2865 /* The destructor of dwarf2_queue_guard frees any entries left on
2866 the queue. After this point we're guaranteed to leave this function
2867 with the dwarf queue empty. */
2868 dwarf2_queue_guard q_guard
;
2870 if (dwarf2_per_objfile
->using_index
2871 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2872 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2874 queue_comp_unit (per_cu
, language_minimal
);
2877 /* If we just loaded a CU from a DWO, and we're working with an index
2878 that may badly handle TUs, load all the TUs in that DWO as well.
2879 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2880 if (!per_cu
->is_debug_types
2881 && per_cu
->cu
!= NULL
2882 && per_cu
->cu
->dwo_unit
!= NULL
2883 && dwarf2_per_objfile
->index_table
!= NULL
2884 && dwarf2_per_objfile
->index_table
->version
<= 7
2885 /* DWP files aren't supported yet. */
2886 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2887 queue_and_load_all_dwo_tus (per_cu
);
2890 process_queue (dwarf2_per_objfile
);
2892 /* Age the cache, releasing compilation units that have not
2893 been used recently. */
2894 age_cached_comp_units (dwarf2_per_objfile
);
2897 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2898 the objfile from which this CU came. Returns the resulting symbol
2901 static struct compunit_symtab
*
2902 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2904 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2906 gdb_assert (dwarf2_per_objfile
->using_index
);
2907 if (!per_cu
->v
.quick
->compunit_symtab
)
2909 free_cached_comp_units
freer (dwarf2_per_objfile
);
2910 scoped_restore decrementer
= increment_reading_symtab ();
2911 dw2_do_instantiate_symtab (per_cu
);
2912 process_cu_includes (dwarf2_per_objfile
);
2915 return per_cu
->v
.quick
->compunit_symtab
;
2918 /* See declaration. */
2920 dwarf2_per_cu_data
*
2921 dwarf2_per_objfile::get_cutu (int index
)
2923 if (index
>= this->n_comp_units
)
2925 index
-= this->n_comp_units
;
2926 gdb_assert (index
< this->n_type_units
);
2927 return &this->all_type_units
[index
]->per_cu
;
2930 return this->all_comp_units
[index
];
2933 /* See declaration. */
2935 dwarf2_per_cu_data
*
2936 dwarf2_per_objfile::get_cu (int index
)
2938 gdb_assert (index
>= 0 && index
< this->n_comp_units
);
2940 return this->all_comp_units
[index
];
2943 /* See declaration. */
2946 dwarf2_per_objfile::get_tu (int index
)
2948 gdb_assert (index
>= 0 && index
< this->n_type_units
);
2950 return this->all_type_units
[index
];
2953 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2954 objfile_obstack, and constructed with the specified field
2957 static dwarf2_per_cu_data
*
2958 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2959 struct dwarf2_section_info
*section
,
2961 sect_offset sect_off
, ULONGEST length
)
2963 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2964 dwarf2_per_cu_data
*the_cu
2965 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2966 struct dwarf2_per_cu_data
);
2967 the_cu
->sect_off
= sect_off
;
2968 the_cu
->length
= length
;
2969 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2970 the_cu
->section
= section
;
2971 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2972 struct dwarf2_per_cu_quick_data
);
2973 the_cu
->is_dwz
= is_dwz
;
2977 /* A helper for create_cus_from_index that handles a given list of
2981 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2982 const gdb_byte
*cu_list
, offset_type n_elements
,
2983 struct dwarf2_section_info
*section
,
2987 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2989 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2991 sect_offset sect_off
2992 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2993 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2996 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2]
2997 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
3002 /* Read the CU list from the mapped index, and use it to create all
3003 the CU objects for this objfile. */
3006 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3007 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3008 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3010 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3012 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3013 dwarf2_per_objfile
->all_comp_units
=
3014 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3015 dwarf2_per_objfile
->n_comp_units
);
3017 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3018 &dwarf2_per_objfile
->info
, 0, 0);
3020 if (dwz_elements
== 0)
3023 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3024 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3025 &dwz
->info
, 1, cu_list_elements
/ 2);
3028 /* Create the signatured type hash table from the index. */
3031 create_signatured_type_table_from_index
3032 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3033 struct dwarf2_section_info
*section
,
3034 const gdb_byte
*bytes
,
3035 offset_type elements
)
3037 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3039 dwarf2_per_objfile
->n_type_units
3040 = dwarf2_per_objfile
->n_allocated_type_units
3042 dwarf2_per_objfile
->all_type_units
=
3043 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3045 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3047 for (offset_type i
= 0; i
< elements
; i
+= 3)
3049 struct signatured_type
*sig_type
;
3052 cu_offset type_offset_in_tu
;
3054 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3055 sect_offset sect_off
3056 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3058 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3060 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3063 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3064 struct signatured_type
);
3065 sig_type
->signature
= signature
;
3066 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3067 sig_type
->per_cu
.is_debug_types
= 1;
3068 sig_type
->per_cu
.section
= section
;
3069 sig_type
->per_cu
.sect_off
= sect_off
;
3070 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3071 sig_type
->per_cu
.v
.quick
3072 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3073 struct dwarf2_per_cu_quick_data
);
3075 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3078 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3081 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3084 /* Create the signatured type hash table from .debug_names. */
3087 create_signatured_type_table_from_debug_names
3088 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3089 const mapped_debug_names
&map
,
3090 struct dwarf2_section_info
*section
,
3091 struct dwarf2_section_info
*abbrev_section
)
3093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3095 dwarf2_read_section (objfile
, section
);
3096 dwarf2_read_section (objfile
, abbrev_section
);
3098 dwarf2_per_objfile
->n_type_units
3099 = dwarf2_per_objfile
->n_allocated_type_units
3101 dwarf2_per_objfile
->all_type_units
3102 = XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3104 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3106 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3108 struct signatured_type
*sig_type
;
3111 sect_offset sect_off
3112 = (sect_offset
) (extract_unsigned_integer
3113 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3115 map
.dwarf5_byte_order
));
3117 comp_unit_head cu_header
;
3118 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3120 section
->buffer
+ to_underlying (sect_off
),
3123 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3124 struct signatured_type
);
3125 sig_type
->signature
= cu_header
.signature
;
3126 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3127 sig_type
->per_cu
.is_debug_types
= 1;
3128 sig_type
->per_cu
.section
= section
;
3129 sig_type
->per_cu
.sect_off
= sect_off
;
3130 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3131 sig_type
->per_cu
.v
.quick
3132 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3133 struct dwarf2_per_cu_quick_data
);
3135 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3138 dwarf2_per_objfile
->all_type_units
[i
] = sig_type
;
3141 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3144 /* Read the address map data from the mapped index, and use it to
3145 populate the objfile's psymtabs_addrmap. */
3148 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3149 struct mapped_index
*index
)
3151 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3152 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3153 const gdb_byte
*iter
, *end
;
3154 struct addrmap
*mutable_map
;
3157 auto_obstack temp_obstack
;
3159 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3161 iter
= index
->address_table
.data ();
3162 end
= iter
+ index
->address_table
.size ();
3164 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3168 ULONGEST hi
, lo
, cu_index
;
3169 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3171 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3173 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3178 complaint (&symfile_complaints
,
3179 _(".gdb_index address table has invalid range (%s - %s)"),
3180 hex_string (lo
), hex_string (hi
));
3184 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3186 complaint (&symfile_complaints
,
3187 _(".gdb_index address table has invalid CU number %u"),
3188 (unsigned) cu_index
);
3192 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3193 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3194 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3195 dwarf2_per_objfile
->get_cu (cu_index
));
3198 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3199 &objfile
->objfile_obstack
);
3202 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3203 populate the objfile's psymtabs_addrmap. */
3206 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3207 struct dwarf2_section_info
*section
)
3209 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3210 bfd
*abfd
= objfile
->obfd
;
3211 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3212 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3213 SECT_OFF_TEXT (objfile
));
3215 auto_obstack temp_obstack
;
3216 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3218 std::unordered_map
<sect_offset
,
3219 dwarf2_per_cu_data
*,
3220 gdb::hash_enum
<sect_offset
>>
3221 debug_info_offset_to_per_cu
;
3222 for (int cui
= 0; cui
< dwarf2_per_objfile
->n_comp_units
; ++cui
)
3224 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (cui
);
3225 const auto insertpair
3226 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3227 if (!insertpair
.second
)
3229 warning (_("Section .debug_aranges in %s has duplicate "
3230 "debug_info_offset %s, ignoring .debug_aranges."),
3231 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3236 dwarf2_read_section (objfile
, section
);
3238 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3240 const gdb_byte
*addr
= section
->buffer
;
3242 while (addr
< section
->buffer
+ section
->size
)
3244 const gdb_byte
*const entry_addr
= addr
;
3245 unsigned int bytes_read
;
3247 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3251 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3252 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3253 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3254 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3256 warning (_("Section .debug_aranges in %s entry at offset %zu "
3257 "length %s exceeds section length %s, "
3258 "ignoring .debug_aranges."),
3259 objfile_name (objfile
), entry_addr
- section
->buffer
,
3260 plongest (bytes_read
+ entry_length
),
3261 pulongest (section
->size
));
3265 /* The version number. */
3266 const uint16_t version
= read_2_bytes (abfd
, addr
);
3270 warning (_("Section .debug_aranges in %s entry at offset %zu "
3271 "has unsupported version %d, ignoring .debug_aranges."),
3272 objfile_name (objfile
), entry_addr
- section
->buffer
,
3277 const uint64_t debug_info_offset
3278 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3279 addr
+= offset_size
;
3280 const auto per_cu_it
3281 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3282 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3284 warning (_("Section .debug_aranges in %s entry at offset %zu "
3285 "debug_info_offset %s does not exists, "
3286 "ignoring .debug_aranges."),
3287 objfile_name (objfile
), entry_addr
- section
->buffer
,
3288 pulongest (debug_info_offset
));
3291 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3293 const uint8_t address_size
= *addr
++;
3294 if (address_size
< 1 || address_size
> 8)
3296 warning (_("Section .debug_aranges in %s entry at offset %zu "
3297 "address_size %u is invalid, ignoring .debug_aranges."),
3298 objfile_name (objfile
), entry_addr
- section
->buffer
,
3303 const uint8_t segment_selector_size
= *addr
++;
3304 if (segment_selector_size
!= 0)
3306 warning (_("Section .debug_aranges in %s entry at offset %zu "
3307 "segment_selector_size %u is not supported, "
3308 "ignoring .debug_aranges."),
3309 objfile_name (objfile
), entry_addr
- section
->buffer
,
3310 segment_selector_size
);
3314 /* Must pad to an alignment boundary that is twice the address
3315 size. It is undocumented by the DWARF standard but GCC does
3317 for (size_t padding
= ((-(addr
- section
->buffer
))
3318 & (2 * address_size
- 1));
3319 padding
> 0; padding
--)
3322 warning (_("Section .debug_aranges in %s entry at offset %zu "
3323 "padding is not zero, ignoring .debug_aranges."),
3324 objfile_name (objfile
), entry_addr
- section
->buffer
);
3330 if (addr
+ 2 * address_size
> entry_end
)
3332 warning (_("Section .debug_aranges in %s entry at offset %zu "
3333 "address list is not properly terminated, "
3334 "ignoring .debug_aranges."),
3335 objfile_name (objfile
), entry_addr
- section
->buffer
);
3338 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3340 addr
+= address_size
;
3341 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3343 addr
+= address_size
;
3344 if (start
== 0 && length
== 0)
3346 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3348 /* Symbol was eliminated due to a COMDAT group. */
3351 ULONGEST end
= start
+ length
;
3352 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3353 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3354 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3358 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3359 &objfile
->objfile_obstack
);
3362 /* Find a slot in the mapped index INDEX for the object named NAME.
3363 If NAME is found, set *VEC_OUT to point to the CU vector in the
3364 constant pool and return true. If NAME cannot be found, return
3368 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3369 offset_type
**vec_out
)
3372 offset_type slot
, step
;
3373 int (*cmp
) (const char *, const char *);
3375 gdb::unique_xmalloc_ptr
<char> without_params
;
3376 if (current_language
->la_language
== language_cplus
3377 || current_language
->la_language
== language_fortran
3378 || current_language
->la_language
== language_d
)
3380 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3383 if (strchr (name
, '(') != NULL
)
3385 without_params
= cp_remove_params (name
);
3387 if (without_params
!= NULL
)
3388 name
= without_params
.get ();
3392 /* Index version 4 did not support case insensitive searches. But the
3393 indices for case insensitive languages are built in lowercase, therefore
3394 simulate our NAME being searched is also lowercased. */
3395 hash
= mapped_index_string_hash ((index
->version
== 4
3396 && case_sensitivity
== case_sensitive_off
3397 ? 5 : index
->version
),
3400 slot
= hash
& (index
->symbol_table
.size () - 1);
3401 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3402 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3408 const auto &bucket
= index
->symbol_table
[slot
];
3409 if (bucket
.name
== 0 && bucket
.vec
== 0)
3412 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3413 if (!cmp (name
, str
))
3415 *vec_out
= (offset_type
*) (index
->constant_pool
3416 + MAYBE_SWAP (bucket
.vec
));
3420 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3424 /* A helper function that reads the .gdb_index from SECTION and fills
3425 in MAP. FILENAME is the name of the file containing the section;
3426 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3427 ok to use deprecated sections.
3429 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3430 out parameters that are filled in with information about the CU and
3431 TU lists in the section.
3433 Returns 1 if all went well, 0 otherwise. */
3436 read_index_from_section (struct objfile
*objfile
,
3437 const char *filename
,
3439 struct dwarf2_section_info
*section
,
3440 struct mapped_index
*map
,
3441 const gdb_byte
**cu_list
,
3442 offset_type
*cu_list_elements
,
3443 const gdb_byte
**types_list
,
3444 offset_type
*types_list_elements
)
3446 const gdb_byte
*addr
;
3447 offset_type version
;
3448 offset_type
*metadata
;
3451 if (dwarf2_section_empty_p (section
))
3454 /* Older elfutils strip versions could keep the section in the main
3455 executable while splitting it for the separate debug info file. */
3456 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3459 dwarf2_read_section (objfile
, section
);
3461 addr
= section
->buffer
;
3462 /* Version check. */
3463 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3464 /* Versions earlier than 3 emitted every copy of a psymbol. This
3465 causes the index to behave very poorly for certain requests. Version 3
3466 contained incomplete addrmap. So, it seems better to just ignore such
3470 static int warning_printed
= 0;
3471 if (!warning_printed
)
3473 warning (_("Skipping obsolete .gdb_index section in %s."),
3475 warning_printed
= 1;
3479 /* Index version 4 uses a different hash function than index version
3482 Versions earlier than 6 did not emit psymbols for inlined
3483 functions. Using these files will cause GDB not to be able to
3484 set breakpoints on inlined functions by name, so we ignore these
3485 indices unless the user has done
3486 "set use-deprecated-index-sections on". */
3487 if (version
< 6 && !deprecated_ok
)
3489 static int warning_printed
= 0;
3490 if (!warning_printed
)
3493 Skipping deprecated .gdb_index section in %s.\n\
3494 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3495 to use the section anyway."),
3497 warning_printed
= 1;
3501 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3502 of the TU (for symbols coming from TUs),
3503 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3504 Plus gold-generated indices can have duplicate entries for global symbols,
3505 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3506 These are just performance bugs, and we can't distinguish gdb-generated
3507 indices from gold-generated ones, so issue no warning here. */
3509 /* Indexes with higher version than the one supported by GDB may be no
3510 longer backward compatible. */
3514 map
->version
= version
;
3515 map
->total_size
= section
->size
;
3517 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3520 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3521 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3525 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3526 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3527 - MAYBE_SWAP (metadata
[i
]))
3531 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3532 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3534 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3537 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3538 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3540 = gdb::array_view
<mapped_index::symbol_table_slot
>
3541 ((mapped_index::symbol_table_slot
*) symbol_table
,
3542 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3545 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3550 /* Read .gdb_index. If everything went ok, initialize the "quick"
3551 elements of all the CUs and return 1. Otherwise, return 0. */
3554 dwarf2_read_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3556 struct mapped_index local_map
, *map
;
3557 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3558 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3559 struct dwz_file
*dwz
;
3560 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3562 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3563 use_deprecated_index_sections
,
3564 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3565 &cu_list
, &cu_list_elements
,
3566 &types_list
, &types_list_elements
))
3569 /* Don't use the index if it's empty. */
3570 if (local_map
.symbol_table
.empty ())
3573 /* If there is a .dwz file, read it so we can get its CU list as
3575 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3578 struct mapped_index dwz_map
;
3579 const gdb_byte
*dwz_types_ignore
;
3580 offset_type dwz_types_elements_ignore
;
3582 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3584 &dwz
->gdb_index
, &dwz_map
,
3585 &dwz_list
, &dwz_list_elements
,
3587 &dwz_types_elements_ignore
))
3589 warning (_("could not read '.gdb_index' section from %s; skipping"),
3590 bfd_get_filename (dwz
->dwz_bfd
));
3595 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3596 dwz_list
, dwz_list_elements
);
3598 if (types_list_elements
)
3600 struct dwarf2_section_info
*section
;
3602 /* We can only handle a single .debug_types when we have an
3604 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3607 section
= VEC_index (dwarf2_section_info_def
,
3608 dwarf2_per_objfile
->types
, 0);
3610 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3611 types_list
, types_list_elements
);
3614 create_addrmap_from_index (dwarf2_per_objfile
, &local_map
);
3616 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3617 map
= new (map
) mapped_index ();
3620 dwarf2_per_objfile
->index_table
= map
;
3621 dwarf2_per_objfile
->using_index
= 1;
3622 dwarf2_per_objfile
->quick_file_names_table
=
3623 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3628 /* die_reader_func for dw2_get_file_names. */
3631 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3632 const gdb_byte
*info_ptr
,
3633 struct die_info
*comp_unit_die
,
3637 struct dwarf2_cu
*cu
= reader
->cu
;
3638 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3639 struct dwarf2_per_objfile
*dwarf2_per_objfile
3640 = cu
->per_cu
->dwarf2_per_objfile
;
3641 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3642 struct dwarf2_per_cu_data
*lh_cu
;
3643 struct attribute
*attr
;
3646 struct quick_file_names
*qfn
;
3648 gdb_assert (! this_cu
->is_debug_types
);
3650 /* Our callers never want to match partial units -- instead they
3651 will match the enclosing full CU. */
3652 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3654 this_cu
->v
.quick
->no_file_data
= 1;
3662 sect_offset line_offset
{};
3664 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3667 struct quick_file_names find_entry
;
3669 line_offset
= (sect_offset
) DW_UNSND (attr
);
3671 /* We may have already read in this line header (TU line header sharing).
3672 If we have we're done. */
3673 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3674 find_entry
.hash
.line_sect_off
= line_offset
;
3675 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3676 &find_entry
, INSERT
);
3679 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3683 lh
= dwarf_decode_line_header (line_offset
, cu
);
3687 lh_cu
->v
.quick
->no_file_data
= 1;
3691 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3692 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3693 qfn
->hash
.line_sect_off
= line_offset
;
3694 gdb_assert (slot
!= NULL
);
3697 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3699 qfn
->num_file_names
= lh
->file_names
.size ();
3701 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3702 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3703 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3704 qfn
->real_names
= NULL
;
3706 lh_cu
->v
.quick
->file_names
= qfn
;
3709 /* A helper for the "quick" functions which attempts to read the line
3710 table for THIS_CU. */
3712 static struct quick_file_names
*
3713 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3715 /* This should never be called for TUs. */
3716 gdb_assert (! this_cu
->is_debug_types
);
3717 /* Nor type unit groups. */
3718 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3720 if (this_cu
->v
.quick
->file_names
!= NULL
)
3721 return this_cu
->v
.quick
->file_names
;
3722 /* If we know there is no line data, no point in looking again. */
3723 if (this_cu
->v
.quick
->no_file_data
)
3726 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3728 if (this_cu
->v
.quick
->no_file_data
)
3730 return this_cu
->v
.quick
->file_names
;
3733 /* A helper for the "quick" functions which computes and caches the
3734 real path for a given file name from the line table. */
3737 dw2_get_real_path (struct objfile
*objfile
,
3738 struct quick_file_names
*qfn
, int index
)
3740 if (qfn
->real_names
== NULL
)
3741 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3742 qfn
->num_file_names
, const char *);
3744 if (qfn
->real_names
[index
] == NULL
)
3745 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3747 return qfn
->real_names
[index
];
3750 static struct symtab
*
3751 dw2_find_last_source_symtab (struct objfile
*objfile
)
3753 struct dwarf2_per_objfile
*dwarf2_per_objfile
3754 = get_dwarf2_per_objfile (objfile
);
3755 int index
= dwarf2_per_objfile
->n_comp_units
- 1;
3756 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->get_cu (index
);
3757 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
);
3762 return compunit_primary_filetab (cust
);
3765 /* Traversal function for dw2_forget_cached_source_info. */
3768 dw2_free_cached_file_names (void **slot
, void *info
)
3770 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3772 if (file_data
->real_names
)
3776 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3778 xfree ((void*) file_data
->real_names
[i
]);
3779 file_data
->real_names
[i
] = NULL
;
3787 dw2_forget_cached_source_info (struct objfile
*objfile
)
3789 struct dwarf2_per_objfile
*dwarf2_per_objfile
3790 = get_dwarf2_per_objfile (objfile
);
3792 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3793 dw2_free_cached_file_names
, NULL
);
3796 /* Helper function for dw2_map_symtabs_matching_filename that expands
3797 the symtabs and calls the iterator. */
3800 dw2_map_expand_apply (struct objfile
*objfile
,
3801 struct dwarf2_per_cu_data
*per_cu
,
3802 const char *name
, const char *real_path
,
3803 gdb::function_view
<bool (symtab
*)> callback
)
3805 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3807 /* Don't visit already-expanded CUs. */
3808 if (per_cu
->v
.quick
->compunit_symtab
)
3811 /* This may expand more than one symtab, and we want to iterate over
3813 dw2_instantiate_symtab (per_cu
);
3815 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3816 last_made
, callback
);
3819 /* Implementation of the map_symtabs_matching_filename method. */
3822 dw2_map_symtabs_matching_filename
3823 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3824 gdb::function_view
<bool (symtab
*)> callback
)
3826 const char *name_basename
= lbasename (name
);
3827 struct dwarf2_per_objfile
*dwarf2_per_objfile
3828 = get_dwarf2_per_objfile (objfile
);
3830 /* The rule is CUs specify all the files, including those used by
3831 any TU, so there's no need to scan TUs here. */
3833 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3836 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (i
);
3837 struct quick_file_names
*file_data
;
3839 /* We only need to look at symtabs not already expanded. */
3840 if (per_cu
->v
.quick
->compunit_symtab
)
3843 file_data
= dw2_get_file_names (per_cu
);
3844 if (file_data
== NULL
)
3847 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3849 const char *this_name
= file_data
->file_names
[j
];
3850 const char *this_real_name
;
3852 if (compare_filenames_for_search (this_name
, name
))
3854 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3860 /* Before we invoke realpath, which can get expensive when many
3861 files are involved, do a quick comparison of the basenames. */
3862 if (! basenames_may_differ
3863 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3866 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3867 if (compare_filenames_for_search (this_real_name
, name
))
3869 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3875 if (real_path
!= NULL
)
3877 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3878 gdb_assert (IS_ABSOLUTE_PATH (name
));
3879 if (this_real_name
!= NULL
3880 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3882 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3894 /* Struct used to manage iterating over all CUs looking for a symbol. */
3896 struct dw2_symtab_iterator
3898 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3899 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3900 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3901 int want_specific_block
;
3902 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3903 Unused if !WANT_SPECIFIC_BLOCK. */
3905 /* The kind of symbol we're looking for. */
3907 /* The list of CUs from the index entry of the symbol,
3908 or NULL if not found. */
3910 /* The next element in VEC to look at. */
3912 /* The number of elements in VEC, or zero if there is no match. */
3914 /* Have we seen a global version of the symbol?
3915 If so we can ignore all further global instances.
3916 This is to work around gold/15646, inefficient gold-generated
3921 /* Initialize the index symtab iterator ITER.
3922 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3923 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3926 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3927 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3928 int want_specific_block
,
3933 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3934 iter
->want_specific_block
= want_specific_block
;
3935 iter
->block_index
= block_index
;
3936 iter
->domain
= domain
;
3938 iter
->global_seen
= 0;
3940 mapped_index
*index
= dwarf2_per_objfile
->index_table
;
3942 /* index is NULL if OBJF_READNOW. */
3943 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3944 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3952 /* Return the next matching CU or NULL if there are no more. */
3954 static struct dwarf2_per_cu_data
*
3955 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3957 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3959 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3961 offset_type cu_index_and_attrs
=
3962 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3963 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3964 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3965 /* This value is only valid for index versions >= 7. */
3966 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3967 gdb_index_symbol_kind symbol_kind
=
3968 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3969 /* Only check the symbol attributes if they're present.
3970 Indices prior to version 7 don't record them,
3971 and indices >= 7 may elide them for certain symbols
3972 (gold does this). */
3974 (dwarf2_per_objfile
->index_table
->version
>= 7
3975 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3977 /* Don't crash on bad data. */
3978 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3979 + dwarf2_per_objfile
->n_type_units
))
3981 complaint (&symfile_complaints
,
3982 _(".gdb_index entry has bad CU index"
3984 objfile_name (dwarf2_per_objfile
->objfile
));
3988 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3990 /* Skip if already read in. */
3991 if (per_cu
->v
.quick
->compunit_symtab
)
3994 /* Check static vs global. */
3997 if (iter
->want_specific_block
3998 && want_static
!= is_static
)
4000 /* Work around gold/15646. */
4001 if (!is_static
&& iter
->global_seen
)
4004 iter
->global_seen
= 1;
4007 /* Only check the symbol's kind if it has one. */
4010 switch (iter
->domain
)
4013 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4014 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4015 /* Some types are also in VAR_DOMAIN. */
4016 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4020 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4024 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4039 static struct compunit_symtab
*
4040 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4041 const char *name
, domain_enum domain
)
4043 struct compunit_symtab
*stab_best
= NULL
;
4044 struct dwarf2_per_objfile
*dwarf2_per_objfile
4045 = get_dwarf2_per_objfile (objfile
);
4047 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4049 struct dw2_symtab_iterator iter
;
4050 struct dwarf2_per_cu_data
*per_cu
;
4052 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4054 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4056 struct symbol
*sym
, *with_opaque
= NULL
;
4057 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
4058 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4059 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4061 sym
= block_find_symbol (block
, name
, domain
,
4062 block_find_non_opaque_type_preferred
,
4065 /* Some caution must be observed with overloaded functions
4066 and methods, since the index will not contain any overload
4067 information (but NAME might contain it). */
4070 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4072 if (with_opaque
!= NULL
4073 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4076 /* Keep looking through other CUs. */
4083 dw2_print_stats (struct objfile
*objfile
)
4085 struct dwarf2_per_objfile
*dwarf2_per_objfile
4086 = get_dwarf2_per_objfile (objfile
);
4087 int total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
4090 for (int i
= 0; i
< total
; ++i
)
4092 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4094 if (!per_cu
->v
.quick
->compunit_symtab
)
4097 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4098 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4101 /* This dumps minimal information about the index.
4102 It is called via "mt print objfiles".
4103 One use is to verify .gdb_index has been loaded by the
4104 gdb.dwarf2/gdb-index.exp testcase. */
4107 dw2_dump (struct objfile
*objfile
)
4109 struct dwarf2_per_objfile
*dwarf2_per_objfile
4110 = get_dwarf2_per_objfile (objfile
);
4112 gdb_assert (dwarf2_per_objfile
->using_index
);
4113 printf_filtered (".gdb_index:");
4114 if (dwarf2_per_objfile
->index_table
!= NULL
)
4116 printf_filtered (" version %d\n",
4117 dwarf2_per_objfile
->index_table
->version
);
4120 printf_filtered (" faked for \"readnow\"\n");
4121 printf_filtered ("\n");
4125 dw2_relocate (struct objfile
*objfile
,
4126 const struct section_offsets
*new_offsets
,
4127 const struct section_offsets
*delta
)
4129 /* There's nothing to relocate here. */
4133 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4134 const char *func_name
)
4136 struct dwarf2_per_objfile
*dwarf2_per_objfile
4137 = get_dwarf2_per_objfile (objfile
);
4139 struct dw2_symtab_iterator iter
;
4140 struct dwarf2_per_cu_data
*per_cu
;
4142 /* Note: It doesn't matter what we pass for block_index here. */
4143 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4146 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4147 dw2_instantiate_symtab (per_cu
);
4152 dw2_expand_all_symtabs (struct objfile
*objfile
)
4154 struct dwarf2_per_objfile
*dwarf2_per_objfile
4155 = get_dwarf2_per_objfile (objfile
);
4156 int total_units
= (dwarf2_per_objfile
->n_comp_units
4157 + dwarf2_per_objfile
->n_type_units
);
4159 for (int i
= 0; i
< total_units
; ++i
)
4161 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4163 dw2_instantiate_symtab (per_cu
);
4168 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4169 const char *fullname
)
4171 struct dwarf2_per_objfile
*dwarf2_per_objfile
4172 = get_dwarf2_per_objfile (objfile
);
4174 /* We don't need to consider type units here.
4175 This is only called for examining code, e.g. expand_line_sal.
4176 There can be an order of magnitude (or more) more type units
4177 than comp units, and we avoid them if we can. */
4179 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4182 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (i
);
4183 struct quick_file_names
*file_data
;
4185 /* We only need to look at symtabs not already expanded. */
4186 if (per_cu
->v
.quick
->compunit_symtab
)
4189 file_data
= dw2_get_file_names (per_cu
);
4190 if (file_data
== NULL
)
4193 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4195 const char *this_fullname
= file_data
->file_names
[j
];
4197 if (filename_cmp (this_fullname
, fullname
) == 0)
4199 dw2_instantiate_symtab (per_cu
);
4207 dw2_map_matching_symbols (struct objfile
*objfile
,
4208 const char * name
, domain_enum domain
,
4210 int (*callback
) (struct block
*,
4211 struct symbol
*, void *),
4212 void *data
, symbol_name_match_type match
,
4213 symbol_compare_ftype
*ordered_compare
)
4215 /* Currently unimplemented; used for Ada. The function can be called if the
4216 current language is Ada for a non-Ada objfile using GNU index. As Ada
4217 does not look for non-Ada symbols this function should just return. */
4220 /* Symbol name matcher for .gdb_index names.
4222 Symbol names in .gdb_index have a few particularities:
4224 - There's no indication of which is the language of each symbol.
4226 Since each language has its own symbol name matching algorithm,
4227 and we don't know which language is the right one, we must match
4228 each symbol against all languages. This would be a potential
4229 performance problem if it were not mitigated by the
4230 mapped_index::name_components lookup table, which significantly
4231 reduces the number of times we need to call into this matcher,
4232 making it a non-issue.
4234 - Symbol names in the index have no overload (parameter)
4235 information. I.e., in C++, "foo(int)" and "foo(long)" both
4236 appear as "foo" in the index, for example.
4238 This means that the lookup names passed to the symbol name
4239 matcher functions must have no parameter information either
4240 because (e.g.) symbol search name "foo" does not match
4241 lookup-name "foo(int)" [while swapping search name for lookup
4244 class gdb_index_symbol_name_matcher
4247 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4248 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4250 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4251 Returns true if any matcher matches. */
4252 bool matches (const char *symbol_name
);
4255 /* A reference to the lookup name we're matching against. */
4256 const lookup_name_info
&m_lookup_name
;
4258 /* A vector holding all the different symbol name matchers, for all
4260 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4263 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4264 (const lookup_name_info
&lookup_name
)
4265 : m_lookup_name (lookup_name
)
4267 /* Prepare the vector of comparison functions upfront, to avoid
4268 doing the same work for each symbol. Care is taken to avoid
4269 matching with the same matcher more than once if/when multiple
4270 languages use the same matcher function. */
4271 auto &matchers
= m_symbol_name_matcher_funcs
;
4272 matchers
.reserve (nr_languages
);
4274 matchers
.push_back (default_symbol_name_matcher
);
4276 for (int i
= 0; i
< nr_languages
; i
++)
4278 const language_defn
*lang
= language_def ((enum language
) i
);
4279 symbol_name_matcher_ftype
*name_matcher
4280 = get_symbol_name_matcher (lang
, m_lookup_name
);
4282 /* Don't insert the same comparison routine more than once.
4283 Note that we do this linear walk instead of a seemingly
4284 cheaper sorted insert, or use a std::set or something like
4285 that, because relative order of function addresses is not
4286 stable. This is not a problem in practice because the number
4287 of supported languages is low, and the cost here is tiny
4288 compared to the number of searches we'll do afterwards using
4290 if (name_matcher
!= default_symbol_name_matcher
4291 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4292 == matchers
.end ()))
4293 matchers
.push_back (name_matcher
);
4298 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4300 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4301 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4307 /* Starting from a search name, return the string that finds the upper
4308 bound of all strings that start with SEARCH_NAME in a sorted name
4309 list. Returns the empty string to indicate that the upper bound is
4310 the end of the list. */
4313 make_sort_after_prefix_name (const char *search_name
)
4315 /* When looking to complete "func", we find the upper bound of all
4316 symbols that start with "func" by looking for where we'd insert
4317 the closest string that would follow "func" in lexicographical
4318 order. Usually, that's "func"-with-last-character-incremented,
4319 i.e. "fund". Mind non-ASCII characters, though. Usually those
4320 will be UTF-8 multi-byte sequences, but we can't be certain.
4321 Especially mind the 0xff character, which is a valid character in
4322 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4323 rule out compilers allowing it in identifiers. Note that
4324 conveniently, strcmp/strcasecmp are specified to compare
4325 characters interpreted as unsigned char. So what we do is treat
4326 the whole string as a base 256 number composed of a sequence of
4327 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4328 to 0, and carries 1 to the following more-significant position.
4329 If the very first character in SEARCH_NAME ends up incremented
4330 and carries/overflows, then the upper bound is the end of the
4331 list. The string after the empty string is also the empty
4334 Some examples of this operation:
4336 SEARCH_NAME => "+1" RESULT
4340 "\xff" "a" "\xff" => "\xff" "b"
4345 Then, with these symbols for example:
4351 completing "func" looks for symbols between "func" and
4352 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4353 which finds "func" and "func1", but not "fund".
4357 funcÿ (Latin1 'ÿ' [0xff])
4361 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4362 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4366 ÿÿ (Latin1 'ÿ' [0xff])
4369 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4370 the end of the list.
4372 std::string after
= search_name
;
4373 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4375 if (!after
.empty ())
4376 after
.back () = (unsigned char) after
.back () + 1;
4380 /* See declaration. */
4382 std::pair
<std::vector
<name_component
>::const_iterator
,
4383 std::vector
<name_component
>::const_iterator
>
4384 mapped_index_base::find_name_components_bounds
4385 (const lookup_name_info
&lookup_name_without_params
) const
4388 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4391 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4393 /* Comparison function object for lower_bound that matches against a
4394 given symbol name. */
4395 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4398 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4399 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4400 return name_cmp (elem_name
, name
) < 0;
4403 /* Comparison function object for upper_bound that matches against a
4404 given symbol name. */
4405 auto lookup_compare_upper
= [&] (const char *name
,
4406 const name_component
&elem
)
4408 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4409 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4410 return name_cmp (name
, elem_name
) < 0;
4413 auto begin
= this->name_components
.begin ();
4414 auto end
= this->name_components
.end ();
4416 /* Find the lower bound. */
4419 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4422 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4425 /* Find the upper bound. */
4428 if (lookup_name_without_params
.completion_mode ())
4430 /* In completion mode, we want UPPER to point past all
4431 symbols names that have the same prefix. I.e., with
4432 these symbols, and completing "func":
4434 function << lower bound
4436 other_function << upper bound
4438 We find the upper bound by looking for the insertion
4439 point of "func"-with-last-character-incremented,
4441 std::string after
= make_sort_after_prefix_name (cplus
);
4444 return std::lower_bound (lower
, end
, after
.c_str (),
4445 lookup_compare_lower
);
4448 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4451 return {lower
, upper
};
4454 /* See declaration. */
4457 mapped_index_base::build_name_components ()
4459 if (!this->name_components
.empty ())
4462 this->name_components_casing
= case_sensitivity
;
4464 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4466 /* The code below only knows how to break apart components of C++
4467 symbol names (and other languages that use '::' as
4468 namespace/module separator). If we add support for wild matching
4469 to some language that uses some other operator (E.g., Ada, Go and
4470 D use '.'), then we'll need to try splitting the symbol name
4471 according to that language too. Note that Ada does support wild
4472 matching, but doesn't currently support .gdb_index. */
4473 auto count
= this->symbol_name_count ();
4474 for (offset_type idx
= 0; idx
< count
; idx
++)
4476 if (this->symbol_name_slot_invalid (idx
))
4479 const char *name
= this->symbol_name_at (idx
);
4481 /* Add each name component to the name component table. */
4482 unsigned int previous_len
= 0;
4483 for (unsigned int current_len
= cp_find_first_component (name
);
4484 name
[current_len
] != '\0';
4485 current_len
+= cp_find_first_component (name
+ current_len
))
4487 gdb_assert (name
[current_len
] == ':');
4488 this->name_components
.push_back ({previous_len
, idx
});
4489 /* Skip the '::'. */
4491 previous_len
= current_len
;
4493 this->name_components
.push_back ({previous_len
, idx
});
4496 /* Sort name_components elements by name. */
4497 auto name_comp_compare
= [&] (const name_component
&left
,
4498 const name_component
&right
)
4500 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4501 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4503 const char *left_name
= left_qualified
+ left
.name_offset
;
4504 const char *right_name
= right_qualified
+ right
.name_offset
;
4506 return name_cmp (left_name
, right_name
) < 0;
4509 std::sort (this->name_components
.begin (),
4510 this->name_components
.end (),
4514 /* Helper for dw2_expand_symtabs_matching that works with a
4515 mapped_index_base instead of the containing objfile. This is split
4516 to a separate function in order to be able to unit test the
4517 name_components matching using a mock mapped_index_base. For each
4518 symbol name that matches, calls MATCH_CALLBACK, passing it the
4519 symbol's index in the mapped_index_base symbol table. */
4522 dw2_expand_symtabs_matching_symbol
4523 (mapped_index_base
&index
,
4524 const lookup_name_info
&lookup_name_in
,
4525 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4526 enum search_domain kind
,
4527 gdb::function_view
<void (offset_type
)> match_callback
)
4529 lookup_name_info lookup_name_without_params
4530 = lookup_name_in
.make_ignore_params ();
4531 gdb_index_symbol_name_matcher lookup_name_matcher
4532 (lookup_name_without_params
);
4534 /* Build the symbol name component sorted vector, if we haven't
4536 index
.build_name_components ();
4538 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4540 /* Now for each symbol name in range, check to see if we have a name
4541 match, and if so, call the MATCH_CALLBACK callback. */
4543 /* The same symbol may appear more than once in the range though.
4544 E.g., if we're looking for symbols that complete "w", and we have
4545 a symbol named "w1::w2", we'll find the two name components for
4546 that same symbol in the range. To be sure we only call the
4547 callback once per symbol, we first collect the symbol name
4548 indexes that matched in a temporary vector and ignore
4550 std::vector
<offset_type
> matches
;
4551 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4553 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4555 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4557 if (!lookup_name_matcher
.matches (qualified
)
4558 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4561 matches
.push_back (bounds
.first
->idx
);
4564 std::sort (matches
.begin (), matches
.end ());
4566 /* Finally call the callback, once per match. */
4568 for (offset_type idx
: matches
)
4572 match_callback (idx
);
4577 /* Above we use a type wider than idx's for 'prev', since 0 and
4578 (offset_type)-1 are both possible values. */
4579 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4584 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4586 /* A mock .gdb_index/.debug_names-like name index table, enough to
4587 exercise dw2_expand_symtabs_matching_symbol, which works with the
4588 mapped_index_base interface. Builds an index from the symbol list
4589 passed as parameter to the constructor. */
4590 class mock_mapped_index
: public mapped_index_base
4593 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4594 : m_symbol_table (symbols
)
4597 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4599 /* Return the number of names in the symbol table. */
4600 virtual size_t symbol_name_count () const
4602 return m_symbol_table
.size ();
4605 /* Get the name of the symbol at IDX in the symbol table. */
4606 virtual const char *symbol_name_at (offset_type idx
) const
4608 return m_symbol_table
[idx
];
4612 gdb::array_view
<const char *> m_symbol_table
;
4615 /* Convenience function that converts a NULL pointer to a "<null>"
4616 string, to pass to print routines. */
4619 string_or_null (const char *str
)
4621 return str
!= NULL
? str
: "<null>";
4624 /* Check if a lookup_name_info built from
4625 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4626 index. EXPECTED_LIST is the list of expected matches, in expected
4627 matching order. If no match expected, then an empty list is
4628 specified. Returns true on success. On failure prints a warning
4629 indicating the file:line that failed, and returns false. */
4632 check_match (const char *file
, int line
,
4633 mock_mapped_index
&mock_index
,
4634 const char *name
, symbol_name_match_type match_type
,
4635 bool completion_mode
,
4636 std::initializer_list
<const char *> expected_list
)
4638 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4640 bool matched
= true;
4642 auto mismatch
= [&] (const char *expected_str
,
4645 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4646 "expected=\"%s\", got=\"%s\"\n"),
4648 (match_type
== symbol_name_match_type::FULL
4650 name
, string_or_null (expected_str
), string_or_null (got
));
4654 auto expected_it
= expected_list
.begin ();
4655 auto expected_end
= expected_list
.end ();
4657 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4659 [&] (offset_type idx
)
4661 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4662 const char *expected_str
4663 = expected_it
== expected_end
? NULL
: *expected_it
++;
4665 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4666 mismatch (expected_str
, matched_name
);
4669 const char *expected_str
4670 = expected_it
== expected_end
? NULL
: *expected_it
++;
4671 if (expected_str
!= NULL
)
4672 mismatch (expected_str
, NULL
);
4677 /* The symbols added to the mock mapped_index for testing (in
4679 static const char *test_symbols
[] = {
4688 "ns2::tmpl<int>::foo2",
4689 "(anonymous namespace)::A::B::C",
4691 /* These are used to check that the increment-last-char in the
4692 matching algorithm for completion doesn't match "t1_fund" when
4693 completing "t1_func". */
4699 /* A UTF-8 name with multi-byte sequences to make sure that
4700 cp-name-parser understands this as a single identifier ("função"
4701 is "function" in PT). */
4704 /* \377 (0xff) is Latin1 'ÿ'. */
4707 /* \377 (0xff) is Latin1 'ÿ'. */
4711 /* A name with all sorts of complications. Starts with "z" to make
4712 it easier for the completion tests below. */
4713 #define Z_SYM_NAME \
4714 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4715 "::tuple<(anonymous namespace)::ui*, " \
4716 "std::default_delete<(anonymous namespace)::ui>, void>"
4721 /* Returns true if the mapped_index_base::find_name_component_bounds
4722 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4723 in completion mode. */
4726 check_find_bounds_finds (mapped_index_base
&index
,
4727 const char *search_name
,
4728 gdb::array_view
<const char *> expected_syms
)
4730 lookup_name_info
lookup_name (search_name
,
4731 symbol_name_match_type::FULL
, true);
4733 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4735 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4736 if (distance
!= expected_syms
.size ())
4739 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4741 auto nc_elem
= bounds
.first
+ exp_elem
;
4742 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4743 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4750 /* Test the lower-level mapped_index::find_name_component_bounds
4754 test_mapped_index_find_name_component_bounds ()
4756 mock_mapped_index
mock_index (test_symbols
);
4758 mock_index
.build_name_components ();
4760 /* Test the lower-level mapped_index::find_name_component_bounds
4761 method in completion mode. */
4763 static const char *expected_syms
[] = {
4768 SELF_CHECK (check_find_bounds_finds (mock_index
,
4769 "t1_func", expected_syms
));
4772 /* Check that the increment-last-char in the name matching algorithm
4773 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4775 static const char *expected_syms1
[] = {
4779 SELF_CHECK (check_find_bounds_finds (mock_index
,
4780 "\377", expected_syms1
));
4782 static const char *expected_syms2
[] = {
4785 SELF_CHECK (check_find_bounds_finds (mock_index
,
4786 "\377\377", expected_syms2
));
4790 /* Test dw2_expand_symtabs_matching_symbol. */
4793 test_dw2_expand_symtabs_matching_symbol ()
4795 mock_mapped_index
mock_index (test_symbols
);
4797 /* We let all tests run until the end even if some fails, for debug
4799 bool any_mismatch
= false;
4801 /* Create the expected symbols list (an initializer_list). Needed
4802 because lists have commas, and we need to pass them to CHECK,
4803 which is a macro. */
4804 #define EXPECT(...) { __VA_ARGS__ }
4806 /* Wrapper for check_match that passes down the current
4807 __FILE__/__LINE__. */
4808 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4809 any_mismatch |= !check_match (__FILE__, __LINE__, \
4811 NAME, MATCH_TYPE, COMPLETION_MODE, \
4814 /* Identity checks. */
4815 for (const char *sym
: test_symbols
)
4817 /* Should be able to match all existing symbols. */
4818 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4821 /* Should be able to match all existing symbols with
4823 std::string with_params
= std::string (sym
) + "(int)";
4824 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4827 /* Should be able to match all existing symbols with
4828 parameters and qualifiers. */
4829 with_params
= std::string (sym
) + " ( int ) const";
4830 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4833 /* This should really find sym, but cp-name-parser.y doesn't
4834 know about lvalue/rvalue qualifiers yet. */
4835 with_params
= std::string (sym
) + " ( int ) &&";
4836 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4840 /* Check that the name matching algorithm for completion doesn't get
4841 confused with Latin1 'ÿ' / 0xff. */
4843 static const char str
[] = "\377";
4844 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4845 EXPECT ("\377", "\377\377123"));
4848 /* Check that the increment-last-char in the matching algorithm for
4849 completion doesn't match "t1_fund" when completing "t1_func". */
4851 static const char str
[] = "t1_func";
4852 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4853 EXPECT ("t1_func", "t1_func1"));
4856 /* Check that completion mode works at each prefix of the expected
4859 static const char str
[] = "function(int)";
4860 size_t len
= strlen (str
);
4863 for (size_t i
= 1; i
< len
; i
++)
4865 lookup
.assign (str
, i
);
4866 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4867 EXPECT ("function"));
4871 /* While "w" is a prefix of both components, the match function
4872 should still only be called once. */
4874 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4876 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4880 /* Same, with a "complicated" symbol. */
4882 static const char str
[] = Z_SYM_NAME
;
4883 size_t len
= strlen (str
);
4886 for (size_t i
= 1; i
< len
; i
++)
4888 lookup
.assign (str
, i
);
4889 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4890 EXPECT (Z_SYM_NAME
));
4894 /* In FULL mode, an incomplete symbol doesn't match. */
4896 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4900 /* A complete symbol with parameters matches any overload, since the
4901 index has no overload info. */
4903 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4904 EXPECT ("std::zfunction", "std::zfunction2"));
4905 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4906 EXPECT ("std::zfunction", "std::zfunction2"));
4907 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4908 EXPECT ("std::zfunction", "std::zfunction2"));
4911 /* Check that whitespace is ignored appropriately. A symbol with a
4912 template argument list. */
4914 static const char expected
[] = "ns::foo<int>";
4915 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4917 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4921 /* Check that whitespace is ignored appropriately. A symbol with a
4922 template argument list that includes a pointer. */
4924 static const char expected
[] = "ns::foo<char*>";
4925 /* Try both completion and non-completion modes. */
4926 static const bool completion_mode
[2] = {false, true};
4927 for (size_t i
= 0; i
< 2; i
++)
4929 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4930 completion_mode
[i
], EXPECT (expected
));
4931 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4932 completion_mode
[i
], EXPECT (expected
));
4934 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4935 completion_mode
[i
], EXPECT (expected
));
4936 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4937 completion_mode
[i
], EXPECT (expected
));
4942 /* Check method qualifiers are ignored. */
4943 static const char expected
[] = "ns::foo<char*>";
4944 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4945 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4946 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4947 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4948 CHECK_MATCH ("foo < char * > ( int ) const",
4949 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4950 CHECK_MATCH ("foo < char * > ( int ) &&",
4951 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4954 /* Test lookup names that don't match anything. */
4956 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4959 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4963 /* Some wild matching tests, exercising "(anonymous namespace)",
4964 which should not be confused with a parameter list. */
4966 static const char *syms
[] = {
4970 "A :: B :: C ( int )",
4975 for (const char *s
: syms
)
4977 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4978 EXPECT ("(anonymous namespace)::A::B::C"));
4983 static const char expected
[] = "ns2::tmpl<int>::foo2";
4984 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4986 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4990 SELF_CHECK (!any_mismatch
);
4999 test_mapped_index_find_name_component_bounds ();
5000 test_dw2_expand_symtabs_matching_symbol ();
5003 }} // namespace selftests::dw2_expand_symtabs_matching
5005 #endif /* GDB_SELF_TEST */
5007 /* If FILE_MATCHER is NULL or if PER_CU has
5008 dwarf2_per_cu_quick_data::MARK set (see
5009 dw_expand_symtabs_matching_file_matcher), expand the CU and call
5010 EXPANSION_NOTIFY on it. */
5013 dw2_expand_symtabs_matching_one
5014 (struct dwarf2_per_cu_data
*per_cu
,
5015 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5016 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
5018 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5020 bool symtab_was_null
5021 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5023 dw2_instantiate_symtab (per_cu
);
5025 if (expansion_notify
!= NULL
5027 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5028 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5032 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5033 matched, to expand corresponding CUs that were marked. IDX is the
5034 index of the symbol name that matched. */
5037 dw2_expand_marked_cus
5038 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5039 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5040 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5043 offset_type
*vec
, vec_len
, vec_idx
;
5044 bool global_seen
= false;
5045 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5047 vec
= (offset_type
*) (index
.constant_pool
5048 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5049 vec_len
= MAYBE_SWAP (vec
[0]);
5050 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5052 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5053 /* This value is only valid for index versions >= 7. */
5054 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5055 gdb_index_symbol_kind symbol_kind
=
5056 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5057 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5058 /* Only check the symbol attributes if they're present.
5059 Indices prior to version 7 don't record them,
5060 and indices >= 7 may elide them for certain symbols
5061 (gold does this). */
5064 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5066 /* Work around gold/15646. */
5069 if (!is_static
&& global_seen
)
5075 /* Only check the symbol's kind if it has one. */
5080 case VARIABLES_DOMAIN
:
5081 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5084 case FUNCTIONS_DOMAIN
:
5085 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5089 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5097 /* Don't crash on bad data. */
5098 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
5099 + dwarf2_per_objfile
->n_type_units
))
5101 complaint (&symfile_complaints
,
5102 _(".gdb_index entry has bad CU index"
5104 objfile_name (dwarf2_per_objfile
->objfile
));
5108 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5109 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5114 /* If FILE_MATCHER is non-NULL, set all the
5115 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5116 that match FILE_MATCHER. */
5119 dw_expand_symtabs_matching_file_matcher
5120 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5121 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5123 if (file_matcher
== NULL
)
5126 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5128 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5130 NULL
, xcalloc
, xfree
));
5131 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5133 NULL
, xcalloc
, xfree
));
5135 /* The rule is CUs specify all the files, including those used by
5136 any TU, so there's no need to scan TUs here. */
5138 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5141 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (i
);
5142 struct quick_file_names
*file_data
;
5147 per_cu
->v
.quick
->mark
= 0;
5149 /* We only need to look at symtabs not already expanded. */
5150 if (per_cu
->v
.quick
->compunit_symtab
)
5153 file_data
= dw2_get_file_names (per_cu
);
5154 if (file_data
== NULL
)
5157 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5159 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5161 per_cu
->v
.quick
->mark
= 1;
5165 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
5167 const char *this_real_name
;
5169 if (file_matcher (file_data
->file_names
[j
], false))
5171 per_cu
->v
.quick
->mark
= 1;
5175 /* Before we invoke realpath, which can get expensive when many
5176 files are involved, do a quick comparison of the basenames. */
5177 if (!basenames_may_differ
5178 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5182 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5183 if (file_matcher (this_real_name
, false))
5185 per_cu
->v
.quick
->mark
= 1;
5190 slot
= htab_find_slot (per_cu
->v
.quick
->mark
5191 ? visited_found
.get ()
5192 : visited_not_found
.get (),
5199 dw2_expand_symtabs_matching
5200 (struct objfile
*objfile
,
5201 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5202 const lookup_name_info
&lookup_name
,
5203 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5204 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5205 enum search_domain kind
)
5207 struct dwarf2_per_objfile
*dwarf2_per_objfile
5208 = get_dwarf2_per_objfile (objfile
);
5210 /* index_table is NULL if OBJF_READNOW. */
5211 if (!dwarf2_per_objfile
->index_table
)
5214 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5216 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5218 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5220 kind
, [&] (offset_type idx
)
5222 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5223 expansion_notify
, kind
);
5227 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5230 static struct compunit_symtab
*
5231 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5236 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5237 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5240 if (cust
->includes
== NULL
)
5243 for (i
= 0; cust
->includes
[i
]; ++i
)
5245 struct compunit_symtab
*s
= cust
->includes
[i
];
5247 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5255 static struct compunit_symtab
*
5256 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5257 struct bound_minimal_symbol msymbol
,
5259 struct obj_section
*section
,
5262 struct dwarf2_per_cu_data
*data
;
5263 struct compunit_symtab
*result
;
5265 if (!objfile
->psymtabs_addrmap
)
5268 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5273 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5274 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5275 paddress (get_objfile_arch (objfile
), pc
));
5278 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5280 gdb_assert (result
!= NULL
);
5285 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5286 void *data
, int need_fullname
)
5288 struct dwarf2_per_objfile
*dwarf2_per_objfile
5289 = get_dwarf2_per_objfile (objfile
);
5291 if (!dwarf2_per_objfile
->filenames_cache
)
5293 dwarf2_per_objfile
->filenames_cache
.emplace ();
5295 htab_up
visited (htab_create_alloc (10,
5296 htab_hash_pointer
, htab_eq_pointer
,
5297 NULL
, xcalloc
, xfree
));
5299 /* The rule is CUs specify all the files, including those used
5300 by any TU, so there's no need to scan TUs here. We can
5301 ignore file names coming from already-expanded CUs. */
5303 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5305 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (i
);
5307 if (per_cu
->v
.quick
->compunit_symtab
)
5309 void **slot
= htab_find_slot (visited
.get (),
5310 per_cu
->v
.quick
->file_names
,
5313 *slot
= per_cu
->v
.quick
->file_names
;
5317 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5319 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (i
);
5320 struct quick_file_names
*file_data
;
5323 /* We only need to look at symtabs not already expanded. */
5324 if (per_cu
->v
.quick
->compunit_symtab
)
5327 file_data
= dw2_get_file_names (per_cu
);
5328 if (file_data
== NULL
)
5331 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5334 /* Already visited. */
5339 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5341 const char *filename
= file_data
->file_names
[j
];
5342 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5347 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5349 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5352 this_real_name
= gdb_realpath (filename
);
5353 (*fun
) (filename
, this_real_name
.get (), data
);
5358 dw2_has_symbols (struct objfile
*objfile
)
5363 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5366 dw2_find_last_source_symtab
,
5367 dw2_forget_cached_source_info
,
5368 dw2_map_symtabs_matching_filename
,
5373 dw2_expand_symtabs_for_function
,
5374 dw2_expand_all_symtabs
,
5375 dw2_expand_symtabs_with_fullname
,
5376 dw2_map_matching_symbols
,
5377 dw2_expand_symtabs_matching
,
5378 dw2_find_pc_sect_compunit_symtab
,
5380 dw2_map_symbol_filenames
5383 /* DWARF-5 debug_names reader. */
5385 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5386 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5388 /* A helper function that reads the .debug_names section in SECTION
5389 and fills in MAP. FILENAME is the name of the file containing the
5390 section; it is used for error reporting.
5392 Returns true if all went well, false otherwise. */
5395 read_debug_names_from_section (struct objfile
*objfile
,
5396 const char *filename
,
5397 struct dwarf2_section_info
*section
,
5398 mapped_debug_names
&map
)
5400 if (dwarf2_section_empty_p (section
))
5403 /* Older elfutils strip versions could keep the section in the main
5404 executable while splitting it for the separate debug info file. */
5405 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5408 dwarf2_read_section (objfile
, section
);
5410 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5412 const gdb_byte
*addr
= section
->buffer
;
5414 bfd
*const abfd
= get_section_bfd_owner (section
);
5416 unsigned int bytes_read
;
5417 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5420 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5421 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5422 if (bytes_read
+ length
!= section
->size
)
5424 /* There may be multiple per-CU indices. */
5425 warning (_("Section .debug_names in %s length %s does not match "
5426 "section length %s, ignoring .debug_names."),
5427 filename
, plongest (bytes_read
+ length
),
5428 pulongest (section
->size
));
5432 /* The version number. */
5433 uint16_t version
= read_2_bytes (abfd
, addr
);
5437 warning (_("Section .debug_names in %s has unsupported version %d, "
5438 "ignoring .debug_names."),
5444 uint16_t padding
= read_2_bytes (abfd
, addr
);
5448 warning (_("Section .debug_names in %s has unsupported padding %d, "
5449 "ignoring .debug_names."),
5454 /* comp_unit_count - The number of CUs in the CU list. */
5455 map
.cu_count
= read_4_bytes (abfd
, addr
);
5458 /* local_type_unit_count - The number of TUs in the local TU
5460 map
.tu_count
= read_4_bytes (abfd
, addr
);
5463 /* foreign_type_unit_count - The number of TUs in the foreign TU
5465 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5467 if (foreign_tu_count
!= 0)
5469 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5470 "ignoring .debug_names."),
5471 filename
, static_cast<unsigned long> (foreign_tu_count
));
5475 /* bucket_count - The number of hash buckets in the hash lookup
5477 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5480 /* name_count - The number of unique names in the index. */
5481 map
.name_count
= read_4_bytes (abfd
, addr
);
5484 /* abbrev_table_size - The size in bytes of the abbreviations
5486 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5489 /* augmentation_string_size - The size in bytes of the augmentation
5490 string. This value is rounded up to a multiple of 4. */
5491 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5493 map
.augmentation_is_gdb
= ((augmentation_string_size
5494 == sizeof (dwarf5_augmentation
))
5495 && memcmp (addr
, dwarf5_augmentation
,
5496 sizeof (dwarf5_augmentation
)) == 0);
5497 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5498 addr
+= augmentation_string_size
;
5501 map
.cu_table_reordered
= addr
;
5502 addr
+= map
.cu_count
* map
.offset_size
;
5504 /* List of Local TUs */
5505 map
.tu_table_reordered
= addr
;
5506 addr
+= map
.tu_count
* map
.offset_size
;
5508 /* Hash Lookup Table */
5509 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5510 addr
+= map
.bucket_count
* 4;
5511 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5512 addr
+= map
.name_count
* 4;
5515 map
.name_table_string_offs_reordered
= addr
;
5516 addr
+= map
.name_count
* map
.offset_size
;
5517 map
.name_table_entry_offs_reordered
= addr
;
5518 addr
+= map
.name_count
* map
.offset_size
;
5520 const gdb_byte
*abbrev_table_start
= addr
;
5523 unsigned int bytes_read
;
5524 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5529 const auto insertpair
5530 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5531 if (!insertpair
.second
)
5533 warning (_("Section .debug_names in %s has duplicate index %s, "
5534 "ignoring .debug_names."),
5535 filename
, pulongest (index_num
));
5538 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5539 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5544 mapped_debug_names::index_val::attr attr
;
5545 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5547 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5549 if (attr
.form
== DW_FORM_implicit_const
)
5551 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5555 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5557 indexval
.attr_vec
.push_back (std::move (attr
));
5560 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5562 warning (_("Section .debug_names in %s has abbreviation_table "
5563 "of size %zu vs. written as %u, ignoring .debug_names."),
5564 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5567 map
.entry_pool
= addr
;
5572 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5576 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5577 const mapped_debug_names
&map
,
5578 dwarf2_section_info
§ion
,
5579 bool is_dwz
, int base_offset
)
5581 sect_offset sect_off_prev
;
5582 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5584 sect_offset sect_off_next
;
5585 if (i
< map
.cu_count
)
5588 = (sect_offset
) (extract_unsigned_integer
5589 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5591 map
.dwarf5_byte_order
));
5594 sect_off_next
= (sect_offset
) section
.size
;
5597 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5598 dwarf2_per_objfile
->all_comp_units
[base_offset
+ (i
- 1)]
5599 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5600 sect_off_prev
, length
);
5602 sect_off_prev
= sect_off_next
;
5606 /* Read the CU list from the mapped index, and use it to create all
5607 the CU objects for this dwarf2_per_objfile. */
5610 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5611 const mapped_debug_names
&map
,
5612 const mapped_debug_names
&dwz_map
)
5614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5616 dwarf2_per_objfile
->n_comp_units
= map
.cu_count
+ dwz_map
.cu_count
;
5617 dwarf2_per_objfile
->all_comp_units
5618 = XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
5619 dwarf2_per_objfile
->n_comp_units
);
5621 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5622 dwarf2_per_objfile
->info
,
5624 0 /* base_offset */);
5626 if (dwz_map
.cu_count
== 0)
5629 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5630 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5632 map
.cu_count
/* base_offset */);
5635 /* Read .debug_names. If everything went ok, initialize the "quick"
5636 elements of all the CUs and return true. Otherwise, return false. */
5639 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5641 mapped_debug_names
local_map (dwarf2_per_objfile
);
5642 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5643 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5645 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5646 &dwarf2_per_objfile
->debug_names
,
5650 /* Don't use the index if it's empty. */
5651 if (local_map
.name_count
== 0)
5654 /* If there is a .dwz file, read it so we can get its CU list as
5656 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5659 if (!read_debug_names_from_section (objfile
,
5660 bfd_get_filename (dwz
->dwz_bfd
),
5661 &dwz
->debug_names
, dwz_map
))
5663 warning (_("could not read '.debug_names' section from %s; skipping"),
5664 bfd_get_filename (dwz
->dwz_bfd
));
5669 create_cus_from_debug_names (dwarf2_per_objfile
, local_map
, dwz_map
);
5671 if (local_map
.tu_count
!= 0)
5673 /* We can only handle a single .debug_types when we have an
5675 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5678 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5679 dwarf2_per_objfile
->types
, 0);
5681 create_signatured_type_table_from_debug_names
5682 (dwarf2_per_objfile
, local_map
, section
, &dwarf2_per_objfile
->abbrev
);
5685 create_addrmap_from_aranges (dwarf2_per_objfile
,
5686 &dwarf2_per_objfile
->debug_aranges
);
5688 dwarf2_per_objfile
->debug_names_table
.reset
5689 (new mapped_debug_names (dwarf2_per_objfile
));
5690 *dwarf2_per_objfile
->debug_names_table
= std::move (local_map
);
5691 dwarf2_per_objfile
->using_index
= 1;
5692 dwarf2_per_objfile
->quick_file_names_table
=
5693 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
5698 /* Type used to manage iterating over all CUs looking for a symbol for
5701 class dw2_debug_names_iterator
5704 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5705 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5706 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5707 bool want_specific_block
,
5708 block_enum block_index
, domain_enum domain
,
5710 : m_map (map
), m_want_specific_block (want_specific_block
),
5711 m_block_index (block_index
), m_domain (domain
),
5712 m_addr (find_vec_in_debug_names (map
, name
))
5715 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5716 search_domain search
, uint32_t namei
)
5719 m_addr (find_vec_in_debug_names (map
, namei
))
5722 /* Return the next matching CU or NULL if there are no more. */
5723 dwarf2_per_cu_data
*next ();
5726 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5728 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5731 /* The internalized form of .debug_names. */
5732 const mapped_debug_names
&m_map
;
5734 /* If true, only look for symbols that match BLOCK_INDEX. */
5735 const bool m_want_specific_block
= false;
5737 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5738 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5740 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5742 /* The kind of symbol we're looking for. */
5743 const domain_enum m_domain
= UNDEF_DOMAIN
;
5744 const search_domain m_search
= ALL_DOMAIN
;
5746 /* The list of CUs from the index entry of the symbol, or NULL if
5748 const gdb_byte
*m_addr
;
5752 mapped_debug_names::namei_to_name (uint32_t namei
) const
5754 const ULONGEST namei_string_offs
5755 = extract_unsigned_integer ((name_table_string_offs_reordered
5756 + namei
* offset_size
),
5759 return read_indirect_string_at_offset
5760 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5763 /* Find a slot in .debug_names for the object named NAME. If NAME is
5764 found, return pointer to its pool data. If NAME cannot be found,
5768 dw2_debug_names_iterator::find_vec_in_debug_names
5769 (const mapped_debug_names
&map
, const char *name
)
5771 int (*cmp
) (const char *, const char *);
5773 if (current_language
->la_language
== language_cplus
5774 || current_language
->la_language
== language_fortran
5775 || current_language
->la_language
== language_d
)
5777 /* NAME is already canonical. Drop any qualifiers as
5778 .debug_names does not contain any. */
5780 if (strchr (name
, '(') != NULL
)
5782 gdb::unique_xmalloc_ptr
<char> without_params
5783 = cp_remove_params (name
);
5785 if (without_params
!= NULL
)
5787 name
= without_params
.get();
5792 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5794 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5796 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5797 (map
.bucket_table_reordered
5798 + (full_hash
% map
.bucket_count
)), 4,
5799 map
.dwarf5_byte_order
);
5803 if (namei
>= map
.name_count
)
5805 complaint (&symfile_complaints
,
5806 _("Wrong .debug_names with name index %u but name_count=%u "
5808 namei
, map
.name_count
,
5809 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5815 const uint32_t namei_full_hash
5816 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5817 (map
.hash_table_reordered
+ namei
), 4,
5818 map
.dwarf5_byte_order
);
5819 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5822 if (full_hash
== namei_full_hash
)
5824 const char *const namei_string
= map
.namei_to_name (namei
);
5826 #if 0 /* An expensive sanity check. */
5827 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5829 complaint (&symfile_complaints
,
5830 _("Wrong .debug_names hash for string at index %u "
5832 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5837 if (cmp (namei_string
, name
) == 0)
5839 const ULONGEST namei_entry_offs
5840 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5841 + namei
* map
.offset_size
),
5842 map
.offset_size
, map
.dwarf5_byte_order
);
5843 return map
.entry_pool
+ namei_entry_offs
;
5848 if (namei
>= map
.name_count
)
5854 dw2_debug_names_iterator::find_vec_in_debug_names
5855 (const mapped_debug_names
&map
, uint32_t namei
)
5857 if (namei
>= map
.name_count
)
5859 complaint (&symfile_complaints
,
5860 _("Wrong .debug_names with name index %u but name_count=%u "
5862 namei
, map
.name_count
,
5863 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5867 const ULONGEST namei_entry_offs
5868 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5869 + namei
* map
.offset_size
),
5870 map
.offset_size
, map
.dwarf5_byte_order
);
5871 return map
.entry_pool
+ namei_entry_offs
;
5874 /* See dw2_debug_names_iterator. */
5876 dwarf2_per_cu_data
*
5877 dw2_debug_names_iterator::next ()
5882 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5883 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5884 bfd
*const abfd
= objfile
->obfd
;
5888 unsigned int bytes_read
;
5889 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5890 m_addr
+= bytes_read
;
5894 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5895 if (indexval_it
== m_map
.abbrev_map
.cend ())
5897 complaint (&symfile_complaints
,
5898 _("Wrong .debug_names undefined abbrev code %s "
5900 pulongest (abbrev
), objfile_name (objfile
));
5903 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5904 bool have_is_static
= false;
5906 dwarf2_per_cu_data
*per_cu
= NULL
;
5907 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5912 case DW_FORM_implicit_const
:
5913 ull
= attr
.implicit_const
;
5915 case DW_FORM_flag_present
:
5919 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5920 m_addr
+= bytes_read
;
5923 complaint (&symfile_complaints
,
5924 _("Unsupported .debug_names form %s [in module %s]"),
5925 dwarf_form_name (attr
.form
),
5926 objfile_name (objfile
));
5929 switch (attr
.dw_idx
)
5931 case DW_IDX_compile_unit
:
5932 /* Don't crash on bad data. */
5933 if (ull
>= dwarf2_per_objfile
->n_comp_units
)
5935 complaint (&symfile_complaints
,
5936 _(".debug_names entry has bad CU index %s"
5939 objfile_name (dwarf2_per_objfile
->objfile
));
5942 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5944 case DW_IDX_type_unit
:
5945 /* Don't crash on bad data. */
5946 if (ull
>= dwarf2_per_objfile
->n_type_units
)
5948 complaint (&symfile_complaints
,
5949 _(".debug_names entry has bad TU index %s"
5952 objfile_name (dwarf2_per_objfile
->objfile
));
5955 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5957 case DW_IDX_GNU_internal
:
5958 if (!m_map
.augmentation_is_gdb
)
5960 have_is_static
= true;
5963 case DW_IDX_GNU_external
:
5964 if (!m_map
.augmentation_is_gdb
)
5966 have_is_static
= true;
5972 /* Skip if already read in. */
5973 if (per_cu
->v
.quick
->compunit_symtab
)
5976 /* Check static vs global. */
5979 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5980 if (m_want_specific_block
&& want_static
!= is_static
)
5984 /* Match dw2_symtab_iter_next, symbol_kind
5985 and debug_names::psymbol_tag. */
5989 switch (indexval
.dwarf_tag
)
5991 case DW_TAG_variable
:
5992 case DW_TAG_subprogram
:
5993 /* Some types are also in VAR_DOMAIN. */
5994 case DW_TAG_typedef
:
5995 case DW_TAG_structure_type
:
6002 switch (indexval
.dwarf_tag
)
6004 case DW_TAG_typedef
:
6005 case DW_TAG_structure_type
:
6012 switch (indexval
.dwarf_tag
)
6015 case DW_TAG_variable
:
6025 /* Match dw2_expand_symtabs_matching, symbol_kind and
6026 debug_names::psymbol_tag. */
6029 case VARIABLES_DOMAIN
:
6030 switch (indexval
.dwarf_tag
)
6032 case DW_TAG_variable
:
6038 case FUNCTIONS_DOMAIN
:
6039 switch (indexval
.dwarf_tag
)
6041 case DW_TAG_subprogram
:
6048 switch (indexval
.dwarf_tag
)
6050 case DW_TAG_typedef
:
6051 case DW_TAG_structure_type
:
6064 static struct compunit_symtab
*
6065 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6066 const char *name
, domain_enum domain
)
6068 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6069 struct dwarf2_per_objfile
*dwarf2_per_objfile
6070 = get_dwarf2_per_objfile (objfile
);
6072 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6075 /* index is NULL if OBJF_READNOW. */
6078 const auto &map
= *mapp
;
6080 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6081 block_index
, domain
, name
);
6083 struct compunit_symtab
*stab_best
= NULL
;
6084 struct dwarf2_per_cu_data
*per_cu
;
6085 while ((per_cu
= iter
.next ()) != NULL
)
6087 struct symbol
*sym
, *with_opaque
= NULL
;
6088 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
6089 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6090 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6092 sym
= block_find_symbol (block
, name
, domain
,
6093 block_find_non_opaque_type_preferred
,
6096 /* Some caution must be observed with overloaded functions and
6097 methods, since the index will not contain any overload
6098 information (but NAME might contain it). */
6101 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6103 if (with_opaque
!= NULL
6104 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6107 /* Keep looking through other CUs. */
6113 /* This dumps minimal information about .debug_names. It is called
6114 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6115 uses this to verify that .debug_names has been loaded. */
6118 dw2_debug_names_dump (struct objfile
*objfile
)
6120 struct dwarf2_per_objfile
*dwarf2_per_objfile
6121 = get_dwarf2_per_objfile (objfile
);
6123 gdb_assert (dwarf2_per_objfile
->using_index
);
6124 printf_filtered (".debug_names:");
6125 if (dwarf2_per_objfile
->debug_names_table
)
6126 printf_filtered (" exists\n");
6128 printf_filtered (" faked for \"readnow\"\n");
6129 printf_filtered ("\n");
6133 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6134 const char *func_name
)
6136 struct dwarf2_per_objfile
*dwarf2_per_objfile
6137 = get_dwarf2_per_objfile (objfile
);
6139 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6140 if (dwarf2_per_objfile
->debug_names_table
)
6142 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6144 /* Note: It doesn't matter what we pass for block_index here. */
6145 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6146 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6148 struct dwarf2_per_cu_data
*per_cu
;
6149 while ((per_cu
= iter
.next ()) != NULL
)
6150 dw2_instantiate_symtab (per_cu
);
6155 dw2_debug_names_expand_symtabs_matching
6156 (struct objfile
*objfile
,
6157 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6158 const lookup_name_info
&lookup_name
,
6159 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6160 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6161 enum search_domain kind
)
6163 struct dwarf2_per_objfile
*dwarf2_per_objfile
6164 = get_dwarf2_per_objfile (objfile
);
6166 /* debug_names_table is NULL if OBJF_READNOW. */
6167 if (!dwarf2_per_objfile
->debug_names_table
)
6170 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6172 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6174 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6176 kind
, [&] (offset_type namei
)
6178 /* The name was matched, now expand corresponding CUs that were
6180 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6182 struct dwarf2_per_cu_data
*per_cu
;
6183 while ((per_cu
= iter
.next ()) != NULL
)
6184 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6189 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6192 dw2_find_last_source_symtab
,
6193 dw2_forget_cached_source_info
,
6194 dw2_map_symtabs_matching_filename
,
6195 dw2_debug_names_lookup_symbol
,
6197 dw2_debug_names_dump
,
6199 dw2_debug_names_expand_symtabs_for_function
,
6200 dw2_expand_all_symtabs
,
6201 dw2_expand_symtabs_with_fullname
,
6202 dw2_map_matching_symbols
,
6203 dw2_debug_names_expand_symtabs_matching
,
6204 dw2_find_pc_sect_compunit_symtab
,
6206 dw2_map_symbol_filenames
6209 /* See symfile.h. */
6212 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6214 struct dwarf2_per_objfile
*dwarf2_per_objfile
6215 = get_dwarf2_per_objfile (objfile
);
6217 /* If we're about to read full symbols, don't bother with the
6218 indices. In this case we also don't care if some other debug
6219 format is making psymtabs, because they are all about to be
6221 if ((objfile
->flags
& OBJF_READNOW
))
6225 dwarf2_per_objfile
->using_index
= 1;
6226 create_all_comp_units (dwarf2_per_objfile
);
6227 create_all_type_units (dwarf2_per_objfile
);
6228 dwarf2_per_objfile
->quick_file_names_table
=
6229 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
6231 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
6232 + dwarf2_per_objfile
->n_type_units
); ++i
)
6234 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6236 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6237 struct dwarf2_per_cu_quick_data
);
6240 /* Return 1 so that gdb sees the "quick" functions. However,
6241 these functions will be no-ops because we will have expanded
6243 *index_kind
= dw_index_kind::GDB_INDEX
;
6247 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6249 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6253 if (dwarf2_read_index (dwarf2_per_objfile
))
6255 *index_kind
= dw_index_kind::GDB_INDEX
;
6264 /* Build a partial symbol table. */
6267 dwarf2_build_psymtabs (struct objfile
*objfile
)
6269 struct dwarf2_per_objfile
*dwarf2_per_objfile
6270 = get_dwarf2_per_objfile (objfile
);
6272 if (objfile
->global_psymbols
.capacity () == 0
6273 && objfile
->static_psymbols
.capacity () == 0)
6274 init_psymbol_list (objfile
, 1024);
6278 /* This isn't really ideal: all the data we allocate on the
6279 objfile's obstack is still uselessly kept around. However,
6280 freeing it seems unsafe. */
6281 psymtab_discarder
psymtabs (objfile
);
6282 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6285 CATCH (except
, RETURN_MASK_ERROR
)
6287 exception_print (gdb_stderr
, except
);
6292 /* Return the total length of the CU described by HEADER. */
6295 get_cu_length (const struct comp_unit_head
*header
)
6297 return header
->initial_length_size
+ header
->length
;
6300 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6303 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6305 sect_offset bottom
= cu_header
->sect_off
;
6306 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6308 return sect_off
>= bottom
&& sect_off
< top
;
6311 /* Find the base address of the compilation unit for range lists and
6312 location lists. It will normally be specified by DW_AT_low_pc.
6313 In DWARF-3 draft 4, the base address could be overridden by
6314 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6315 compilation units with discontinuous ranges. */
6318 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6320 struct attribute
*attr
;
6323 cu
->base_address
= 0;
6325 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6328 cu
->base_address
= attr_value_as_address (attr
);
6333 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6336 cu
->base_address
= attr_value_as_address (attr
);
6342 /* Read in the comp unit header information from the debug_info at info_ptr.
6343 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6344 NOTE: This leaves members offset, first_die_offset to be filled in
6347 static const gdb_byte
*
6348 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6349 const gdb_byte
*info_ptr
,
6350 struct dwarf2_section_info
*section
,
6351 rcuh_kind section_kind
)
6354 unsigned int bytes_read
;
6355 const char *filename
= get_section_file_name (section
);
6356 bfd
*abfd
= get_section_bfd_owner (section
);
6358 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6359 cu_header
->initial_length_size
= bytes_read
;
6360 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6361 info_ptr
+= bytes_read
;
6362 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6364 if (cu_header
->version
< 5)
6365 switch (section_kind
)
6367 case rcuh_kind::COMPILE
:
6368 cu_header
->unit_type
= DW_UT_compile
;
6370 case rcuh_kind::TYPE
:
6371 cu_header
->unit_type
= DW_UT_type
;
6374 internal_error (__FILE__
, __LINE__
,
6375 _("read_comp_unit_head: invalid section_kind"));
6379 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6380 (read_1_byte (abfd
, info_ptr
));
6382 switch (cu_header
->unit_type
)
6385 if (section_kind
!= rcuh_kind::COMPILE
)
6386 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6387 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6391 section_kind
= rcuh_kind::TYPE
;
6394 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6395 "(is %d, should be %d or %d) [in module %s]"),
6396 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6399 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6402 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6405 info_ptr
+= bytes_read
;
6406 if (cu_header
->version
< 5)
6408 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6411 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6412 if (signed_addr
< 0)
6413 internal_error (__FILE__
, __LINE__
,
6414 _("read_comp_unit_head: dwarf from non elf file"));
6415 cu_header
->signed_addr_p
= signed_addr
;
6417 if (section_kind
== rcuh_kind::TYPE
)
6419 LONGEST type_offset
;
6421 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6424 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6425 info_ptr
+= bytes_read
;
6426 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6427 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6428 error (_("Dwarf Error: Too big type_offset in compilation unit "
6429 "header (is %s) [in module %s]"), plongest (type_offset
),
6436 /* Helper function that returns the proper abbrev section for
6439 static struct dwarf2_section_info
*
6440 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6442 struct dwarf2_section_info
*abbrev
;
6443 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6445 if (this_cu
->is_dwz
)
6446 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6448 abbrev
= &dwarf2_per_objfile
->abbrev
;
6453 /* Subroutine of read_and_check_comp_unit_head and
6454 read_and_check_type_unit_head to simplify them.
6455 Perform various error checking on the header. */
6458 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6459 struct comp_unit_head
*header
,
6460 struct dwarf2_section_info
*section
,
6461 struct dwarf2_section_info
*abbrev_section
)
6463 const char *filename
= get_section_file_name (section
);
6465 if (header
->version
< 2 || header
->version
> 5)
6466 error (_("Dwarf Error: wrong version in compilation unit header "
6467 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6470 if (to_underlying (header
->abbrev_sect_off
)
6471 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6472 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6473 "(offset %s + 6) [in module %s]"),
6474 sect_offset_str (header
->abbrev_sect_off
),
6475 sect_offset_str (header
->sect_off
),
6478 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6479 avoid potential 32-bit overflow. */
6480 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6482 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6483 "(offset %s + 0) [in module %s]"),
6484 header
->length
, sect_offset_str (header
->sect_off
),
6488 /* Read in a CU/TU header and perform some basic error checking.
6489 The contents of the header are stored in HEADER.
6490 The result is a pointer to the start of the first DIE. */
6492 static const gdb_byte
*
6493 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6494 struct comp_unit_head
*header
,
6495 struct dwarf2_section_info
*section
,
6496 struct dwarf2_section_info
*abbrev_section
,
6497 const gdb_byte
*info_ptr
,
6498 rcuh_kind section_kind
)
6500 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6502 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6504 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6506 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6508 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6514 /* Fetch the abbreviation table offset from a comp or type unit header. */
6517 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6518 struct dwarf2_section_info
*section
,
6519 sect_offset sect_off
)
6521 bfd
*abfd
= get_section_bfd_owner (section
);
6522 const gdb_byte
*info_ptr
;
6523 unsigned int initial_length_size
, offset_size
;
6526 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6527 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6528 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6529 offset_size
= initial_length_size
== 4 ? 4 : 8;
6530 info_ptr
+= initial_length_size
;
6532 version
= read_2_bytes (abfd
, info_ptr
);
6536 /* Skip unit type and address size. */
6540 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6543 /* Allocate a new partial symtab for file named NAME and mark this new
6544 partial symtab as being an include of PST. */
6547 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6548 struct objfile
*objfile
)
6550 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6552 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6554 /* It shares objfile->objfile_obstack. */
6555 subpst
->dirname
= pst
->dirname
;
6558 subpst
->textlow
= 0;
6559 subpst
->texthigh
= 0;
6561 subpst
->dependencies
6562 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6563 subpst
->dependencies
[0] = pst
;
6564 subpst
->number_of_dependencies
= 1;
6566 subpst
->globals_offset
= 0;
6567 subpst
->n_global_syms
= 0;
6568 subpst
->statics_offset
= 0;
6569 subpst
->n_static_syms
= 0;
6570 subpst
->compunit_symtab
= NULL
;
6571 subpst
->read_symtab
= pst
->read_symtab
;
6574 /* No private part is necessary for include psymtabs. This property
6575 can be used to differentiate between such include psymtabs and
6576 the regular ones. */
6577 subpst
->read_symtab_private
= NULL
;
6580 /* Read the Line Number Program data and extract the list of files
6581 included by the source file represented by PST. Build an include
6582 partial symtab for each of these included files. */
6585 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6586 struct die_info
*die
,
6587 struct partial_symtab
*pst
)
6590 struct attribute
*attr
;
6592 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6594 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6596 return; /* No linetable, so no includes. */
6598 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6599 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6603 hash_signatured_type (const void *item
)
6605 const struct signatured_type
*sig_type
6606 = (const struct signatured_type
*) item
;
6608 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6609 return sig_type
->signature
;
6613 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6615 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6616 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6618 return lhs
->signature
== rhs
->signature
;
6621 /* Allocate a hash table for signatured types. */
6624 allocate_signatured_type_table (struct objfile
*objfile
)
6626 return htab_create_alloc_ex (41,
6627 hash_signatured_type
,
6630 &objfile
->objfile_obstack
,
6631 hashtab_obstack_allocate
,
6632 dummy_obstack_deallocate
);
6635 /* A helper function to add a signatured type CU to a table. */
6638 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6640 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6641 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
6649 /* A helper for create_debug_types_hash_table. Read types from SECTION
6650 and fill them into TYPES_HTAB. It will process only type units,
6651 therefore DW_UT_type. */
6654 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6655 struct dwo_file
*dwo_file
,
6656 dwarf2_section_info
*section
, htab_t
&types_htab
,
6657 rcuh_kind section_kind
)
6659 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6660 struct dwarf2_section_info
*abbrev_section
;
6662 const gdb_byte
*info_ptr
, *end_ptr
;
6664 abbrev_section
= (dwo_file
!= NULL
6665 ? &dwo_file
->sections
.abbrev
6666 : &dwarf2_per_objfile
->abbrev
);
6668 if (dwarf_read_debug
)
6669 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6670 get_section_name (section
),
6671 get_section_file_name (abbrev_section
));
6673 dwarf2_read_section (objfile
, section
);
6674 info_ptr
= section
->buffer
;
6676 if (info_ptr
== NULL
)
6679 /* We can't set abfd until now because the section may be empty or
6680 not present, in which case the bfd is unknown. */
6681 abfd
= get_section_bfd_owner (section
);
6683 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6684 because we don't need to read any dies: the signature is in the
6687 end_ptr
= info_ptr
+ section
->size
;
6688 while (info_ptr
< end_ptr
)
6690 struct signatured_type
*sig_type
;
6691 struct dwo_unit
*dwo_tu
;
6693 const gdb_byte
*ptr
= info_ptr
;
6694 struct comp_unit_head header
;
6695 unsigned int length
;
6697 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6699 /* Initialize it due to a false compiler warning. */
6700 header
.signature
= -1;
6701 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6703 /* We need to read the type's signature in order to build the hash
6704 table, but we don't need anything else just yet. */
6706 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6707 abbrev_section
, ptr
, section_kind
);
6709 length
= get_cu_length (&header
);
6711 /* Skip dummy type units. */
6712 if (ptr
>= info_ptr
+ length
6713 || peek_abbrev_code (abfd
, ptr
) == 0
6714 || header
.unit_type
!= DW_UT_type
)
6720 if (types_htab
== NULL
)
6723 types_htab
= allocate_dwo_unit_table (objfile
);
6725 types_htab
= allocate_signatured_type_table (objfile
);
6731 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6733 dwo_tu
->dwo_file
= dwo_file
;
6734 dwo_tu
->signature
= header
.signature
;
6735 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6736 dwo_tu
->section
= section
;
6737 dwo_tu
->sect_off
= sect_off
;
6738 dwo_tu
->length
= length
;
6742 /* N.B.: type_offset is not usable if this type uses a DWO file.
6743 The real type_offset is in the DWO file. */
6745 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6746 struct signatured_type
);
6747 sig_type
->signature
= header
.signature
;
6748 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6749 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6750 sig_type
->per_cu
.is_debug_types
= 1;
6751 sig_type
->per_cu
.section
= section
;
6752 sig_type
->per_cu
.sect_off
= sect_off
;
6753 sig_type
->per_cu
.length
= length
;
6756 slot
= htab_find_slot (types_htab
,
6757 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6759 gdb_assert (slot
!= NULL
);
6762 sect_offset dup_sect_off
;
6766 const struct dwo_unit
*dup_tu
6767 = (const struct dwo_unit
*) *slot
;
6769 dup_sect_off
= dup_tu
->sect_off
;
6773 const struct signatured_type
*dup_tu
6774 = (const struct signatured_type
*) *slot
;
6776 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6779 complaint (&symfile_complaints
,
6780 _("debug type entry at offset %s is duplicate to"
6781 " the entry at offset %s, signature %s"),
6782 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6783 hex_string (header
.signature
));
6785 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6787 if (dwarf_read_debug
> 1)
6788 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6789 sect_offset_str (sect_off
),
6790 hex_string (header
.signature
));
6796 /* Create the hash table of all entries in the .debug_types
6797 (or .debug_types.dwo) section(s).
6798 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6799 otherwise it is NULL.
6801 The result is a pointer to the hash table or NULL if there are no types.
6803 Note: This function processes DWO files only, not DWP files. */
6806 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6807 struct dwo_file
*dwo_file
,
6808 VEC (dwarf2_section_info_def
) *types
,
6812 struct dwarf2_section_info
*section
;
6814 if (VEC_empty (dwarf2_section_info_def
, types
))
6818 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6820 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6821 types_htab
, rcuh_kind::TYPE
);
6824 /* Create the hash table of all entries in the .debug_types section,
6825 and initialize all_type_units.
6826 The result is zero if there is an error (e.g. missing .debug_types section),
6827 otherwise non-zero. */
6830 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6832 htab_t types_htab
= NULL
;
6833 struct signatured_type
**iter
;
6835 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6836 &dwarf2_per_objfile
->info
, types_htab
,
6837 rcuh_kind::COMPILE
);
6838 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6839 dwarf2_per_objfile
->types
, types_htab
);
6840 if (types_htab
== NULL
)
6842 dwarf2_per_objfile
->signatured_types
= NULL
;
6846 dwarf2_per_objfile
->signatured_types
= types_htab
;
6848 dwarf2_per_objfile
->n_type_units
6849 = dwarf2_per_objfile
->n_allocated_type_units
6850 = htab_elements (types_htab
);
6851 dwarf2_per_objfile
->all_type_units
=
6852 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
6853 iter
= &dwarf2_per_objfile
->all_type_units
[0];
6854 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
6855 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
6856 == dwarf2_per_objfile
->n_type_units
);
6861 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6862 If SLOT is non-NULL, it is the entry to use in the hash table.
6863 Otherwise we find one. */
6865 static struct signatured_type
*
6866 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6869 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6870 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
6871 struct signatured_type
*sig_type
;
6873 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
6875 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
6877 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
6878 dwarf2_per_objfile
->n_allocated_type_units
= 1;
6879 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
6880 dwarf2_per_objfile
->all_type_units
6881 = XRESIZEVEC (struct signatured_type
*,
6882 dwarf2_per_objfile
->all_type_units
,
6883 dwarf2_per_objfile
->n_allocated_type_units
);
6884 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6886 dwarf2_per_objfile
->n_type_units
= n_type_units
;
6888 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6889 struct signatured_type
);
6890 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
6891 sig_type
->signature
= sig
;
6892 sig_type
->per_cu
.is_debug_types
= 1;
6893 if (dwarf2_per_objfile
->using_index
)
6895 sig_type
->per_cu
.v
.quick
=
6896 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6897 struct dwarf2_per_cu_quick_data
);
6902 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6905 gdb_assert (*slot
== NULL
);
6907 /* The rest of sig_type must be filled in by the caller. */
6911 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6912 Fill in SIG_ENTRY with DWO_ENTRY. */
6915 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6916 struct signatured_type
*sig_entry
,
6917 struct dwo_unit
*dwo_entry
)
6919 /* Make sure we're not clobbering something we don't expect to. */
6920 gdb_assert (! sig_entry
->per_cu
.queued
);
6921 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6922 if (dwarf2_per_objfile
->using_index
)
6924 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6925 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6928 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6929 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6930 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6931 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6932 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6934 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6935 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6936 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6937 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6938 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6939 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6940 sig_entry
->dwo_unit
= dwo_entry
;
6943 /* Subroutine of lookup_signatured_type.
6944 If we haven't read the TU yet, create the signatured_type data structure
6945 for a TU to be read in directly from a DWO file, bypassing the stub.
6946 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6947 using .gdb_index, then when reading a CU we want to stay in the DWO file
6948 containing that CU. Otherwise we could end up reading several other DWO
6949 files (due to comdat folding) to process the transitive closure of all the
6950 mentioned TUs, and that can be slow. The current DWO file will have every
6951 type signature that it needs.
6952 We only do this for .gdb_index because in the psymtab case we already have
6953 to read all the DWOs to build the type unit groups. */
6955 static struct signatured_type
*
6956 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6958 struct dwarf2_per_objfile
*dwarf2_per_objfile
6959 = cu
->per_cu
->dwarf2_per_objfile
;
6960 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6961 struct dwo_file
*dwo_file
;
6962 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6963 struct signatured_type find_sig_entry
, *sig_entry
;
6966 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6968 /* If TU skeletons have been removed then we may not have read in any
6970 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6972 dwarf2_per_objfile
->signatured_types
6973 = allocate_signatured_type_table (objfile
);
6976 /* We only ever need to read in one copy of a signatured type.
6977 Use the global signatured_types array to do our own comdat-folding
6978 of types. If this is the first time we're reading this TU, and
6979 the TU has an entry in .gdb_index, replace the recorded data from
6980 .gdb_index with this TU. */
6982 find_sig_entry
.signature
= sig
;
6983 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6984 &find_sig_entry
, INSERT
);
6985 sig_entry
= (struct signatured_type
*) *slot
;
6987 /* We can get here with the TU already read, *or* in the process of being
6988 read. Don't reassign the global entry to point to this DWO if that's
6989 the case. Also note that if the TU is already being read, it may not
6990 have come from a DWO, the program may be a mix of Fission-compiled
6991 code and non-Fission-compiled code. */
6993 /* Have we already tried to read this TU?
6994 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6995 needn't exist in the global table yet). */
6996 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6999 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7000 dwo_unit of the TU itself. */
7001 dwo_file
= cu
->dwo_unit
->dwo_file
;
7003 /* Ok, this is the first time we're reading this TU. */
7004 if (dwo_file
->tus
== NULL
)
7006 find_dwo_entry
.signature
= sig
;
7007 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7008 if (dwo_entry
== NULL
)
7011 /* If the global table doesn't have an entry for this TU, add one. */
7012 if (sig_entry
== NULL
)
7013 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7015 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7016 sig_entry
->per_cu
.tu_read
= 1;
7020 /* Subroutine of lookup_signatured_type.
7021 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7022 then try the DWP file. If the TU stub (skeleton) has been removed then
7023 it won't be in .gdb_index. */
7025 static struct signatured_type
*
7026 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7028 struct dwarf2_per_objfile
*dwarf2_per_objfile
7029 = cu
->per_cu
->dwarf2_per_objfile
;
7030 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7031 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7032 struct dwo_unit
*dwo_entry
;
7033 struct signatured_type find_sig_entry
, *sig_entry
;
7036 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7037 gdb_assert (dwp_file
!= NULL
);
7039 /* If TU skeletons have been removed then we may not have read in any
7041 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7043 dwarf2_per_objfile
->signatured_types
7044 = allocate_signatured_type_table (objfile
);
7047 find_sig_entry
.signature
= sig
;
7048 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7049 &find_sig_entry
, INSERT
);
7050 sig_entry
= (struct signatured_type
*) *slot
;
7052 /* Have we already tried to read this TU?
7053 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7054 needn't exist in the global table yet). */
7055 if (sig_entry
!= NULL
)
7058 if (dwp_file
->tus
== NULL
)
7060 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7061 sig
, 1 /* is_debug_types */);
7062 if (dwo_entry
== NULL
)
7065 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7066 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7071 /* Lookup a signature based type for DW_FORM_ref_sig8.
7072 Returns NULL if signature SIG is not present in the table.
7073 It is up to the caller to complain about this. */
7075 static struct signatured_type
*
7076 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7078 struct dwarf2_per_objfile
*dwarf2_per_objfile
7079 = cu
->per_cu
->dwarf2_per_objfile
;
7082 && dwarf2_per_objfile
->using_index
)
7084 /* We're in a DWO/DWP file, and we're using .gdb_index.
7085 These cases require special processing. */
7086 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7087 return lookup_dwo_signatured_type (cu
, sig
);
7089 return lookup_dwp_signatured_type (cu
, sig
);
7093 struct signatured_type find_entry
, *entry
;
7095 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7097 find_entry
.signature
= sig
;
7098 entry
= ((struct signatured_type
*)
7099 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7104 /* Low level DIE reading support. */
7106 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7109 init_cu_die_reader (struct die_reader_specs
*reader
,
7110 struct dwarf2_cu
*cu
,
7111 struct dwarf2_section_info
*section
,
7112 struct dwo_file
*dwo_file
,
7113 struct abbrev_table
*abbrev_table
)
7115 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7116 reader
->abfd
= get_section_bfd_owner (section
);
7118 reader
->dwo_file
= dwo_file
;
7119 reader
->die_section
= section
;
7120 reader
->buffer
= section
->buffer
;
7121 reader
->buffer_end
= section
->buffer
+ section
->size
;
7122 reader
->comp_dir
= NULL
;
7123 reader
->abbrev_table
= abbrev_table
;
7126 /* Subroutine of init_cutu_and_read_dies to simplify it.
7127 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7128 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7131 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7132 from it to the DIE in the DWO. If NULL we are skipping the stub.
7133 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7134 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7135 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7136 STUB_COMP_DIR may be non-NULL.
7137 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7138 are filled in with the info of the DIE from the DWO file.
7139 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7140 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7141 kept around for at least as long as *RESULT_READER.
7143 The result is non-zero if a valid (non-dummy) DIE was found. */
7146 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7147 struct dwo_unit
*dwo_unit
,
7148 struct die_info
*stub_comp_unit_die
,
7149 const char *stub_comp_dir
,
7150 struct die_reader_specs
*result_reader
,
7151 const gdb_byte
**result_info_ptr
,
7152 struct die_info
**result_comp_unit_die
,
7153 int *result_has_children
,
7154 abbrev_table_up
*result_dwo_abbrev_table
)
7156 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7157 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7158 struct dwarf2_cu
*cu
= this_cu
->cu
;
7160 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7161 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7162 int i
,num_extra_attrs
;
7163 struct dwarf2_section_info
*dwo_abbrev_section
;
7164 struct attribute
*attr
;
7165 struct die_info
*comp_unit_die
;
7167 /* At most one of these may be provided. */
7168 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7170 /* These attributes aren't processed until later:
7171 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7172 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7173 referenced later. However, these attributes are found in the stub
7174 which we won't have later. In order to not impose this complication
7175 on the rest of the code, we read them here and copy them to the
7184 if (stub_comp_unit_die
!= NULL
)
7186 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7188 if (! this_cu
->is_debug_types
)
7189 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7190 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7191 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7192 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7193 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7195 /* There should be a DW_AT_addr_base attribute here (if needed).
7196 We need the value before we can process DW_FORM_GNU_addr_index. */
7198 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7200 cu
->addr_base
= DW_UNSND (attr
);
7202 /* There should be a DW_AT_ranges_base attribute here (if needed).
7203 We need the value before we can process DW_AT_ranges. */
7204 cu
->ranges_base
= 0;
7205 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7207 cu
->ranges_base
= DW_UNSND (attr
);
7209 else if (stub_comp_dir
!= NULL
)
7211 /* Reconstruct the comp_dir attribute to simplify the code below. */
7212 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7213 comp_dir
->name
= DW_AT_comp_dir
;
7214 comp_dir
->form
= DW_FORM_string
;
7215 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7216 DW_STRING (comp_dir
) = stub_comp_dir
;
7219 /* Set up for reading the DWO CU/TU. */
7220 cu
->dwo_unit
= dwo_unit
;
7221 dwarf2_section_info
*section
= dwo_unit
->section
;
7222 dwarf2_read_section (objfile
, section
);
7223 abfd
= get_section_bfd_owner (section
);
7224 begin_info_ptr
= info_ptr
= (section
->buffer
7225 + to_underlying (dwo_unit
->sect_off
));
7226 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7228 if (this_cu
->is_debug_types
)
7230 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7232 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7233 &cu
->header
, section
,
7235 info_ptr
, rcuh_kind::TYPE
);
7236 /* This is not an assert because it can be caused by bad debug info. */
7237 if (sig_type
->signature
!= cu
->header
.signature
)
7239 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7240 " TU at offset %s [in module %s]"),
7241 hex_string (sig_type
->signature
),
7242 hex_string (cu
->header
.signature
),
7243 sect_offset_str (dwo_unit
->sect_off
),
7244 bfd_get_filename (abfd
));
7246 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7247 /* For DWOs coming from DWP files, we don't know the CU length
7248 nor the type's offset in the TU until now. */
7249 dwo_unit
->length
= get_cu_length (&cu
->header
);
7250 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7252 /* Establish the type offset that can be used to lookup the type.
7253 For DWO files, we don't know it until now. */
7254 sig_type
->type_offset_in_section
7255 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7259 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7260 &cu
->header
, section
,
7262 info_ptr
, rcuh_kind::COMPILE
);
7263 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7264 /* For DWOs coming from DWP files, we don't know the CU length
7266 dwo_unit
->length
= get_cu_length (&cu
->header
);
7269 *result_dwo_abbrev_table
7270 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7271 cu
->header
.abbrev_sect_off
);
7272 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7273 result_dwo_abbrev_table
->get ());
7275 /* Read in the die, but leave space to copy over the attributes
7276 from the stub. This has the benefit of simplifying the rest of
7277 the code - all the work to maintain the illusion of a single
7278 DW_TAG_{compile,type}_unit DIE is done here. */
7279 num_extra_attrs
= ((stmt_list
!= NULL
)
7283 + (comp_dir
!= NULL
));
7284 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7285 result_has_children
, num_extra_attrs
);
7287 /* Copy over the attributes from the stub to the DIE we just read in. */
7288 comp_unit_die
= *result_comp_unit_die
;
7289 i
= comp_unit_die
->num_attrs
;
7290 if (stmt_list
!= NULL
)
7291 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7293 comp_unit_die
->attrs
[i
++] = *low_pc
;
7294 if (high_pc
!= NULL
)
7295 comp_unit_die
->attrs
[i
++] = *high_pc
;
7297 comp_unit_die
->attrs
[i
++] = *ranges
;
7298 if (comp_dir
!= NULL
)
7299 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7300 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7302 if (dwarf_die_debug
)
7304 fprintf_unfiltered (gdb_stdlog
,
7305 "Read die from %s@0x%x of %s:\n",
7306 get_section_name (section
),
7307 (unsigned) (begin_info_ptr
- section
->buffer
),
7308 bfd_get_filename (abfd
));
7309 dump_die (comp_unit_die
, dwarf_die_debug
);
7312 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7313 TUs by skipping the stub and going directly to the entry in the DWO file.
7314 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7315 to get it via circuitous means. Blech. */
7316 if (comp_dir
!= NULL
)
7317 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7319 /* Skip dummy compilation units. */
7320 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7321 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7324 *result_info_ptr
= info_ptr
;
7328 /* Subroutine of init_cutu_and_read_dies to simplify it.
7329 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7330 Returns NULL if the specified DWO unit cannot be found. */
7332 static struct dwo_unit
*
7333 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7334 struct die_info
*comp_unit_die
)
7336 struct dwarf2_cu
*cu
= this_cu
->cu
;
7338 struct dwo_unit
*dwo_unit
;
7339 const char *comp_dir
, *dwo_name
;
7341 gdb_assert (cu
!= NULL
);
7343 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7344 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7345 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7347 if (this_cu
->is_debug_types
)
7349 struct signatured_type
*sig_type
;
7351 /* Since this_cu is the first member of struct signatured_type,
7352 we can go from a pointer to one to a pointer to the other. */
7353 sig_type
= (struct signatured_type
*) this_cu
;
7354 signature
= sig_type
->signature
;
7355 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7359 struct attribute
*attr
;
7361 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7363 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7365 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7366 signature
= DW_UNSND (attr
);
7367 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7374 /* Subroutine of init_cutu_and_read_dies to simplify it.
7375 See it for a description of the parameters.
7376 Read a TU directly from a DWO file, bypassing the stub. */
7379 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7380 int use_existing_cu
, int keep
,
7381 die_reader_func_ftype
*die_reader_func
,
7384 std::unique_ptr
<dwarf2_cu
> new_cu
;
7385 struct signatured_type
*sig_type
;
7386 struct die_reader_specs reader
;
7387 const gdb_byte
*info_ptr
;
7388 struct die_info
*comp_unit_die
;
7390 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7392 /* Verify we can do the following downcast, and that we have the
7394 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7395 sig_type
= (struct signatured_type
*) this_cu
;
7396 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7398 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7400 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7401 /* There's no need to do the rereading_dwo_cu handling that
7402 init_cutu_and_read_dies does since we don't read the stub. */
7406 /* If !use_existing_cu, this_cu->cu must be NULL. */
7407 gdb_assert (this_cu
->cu
== NULL
);
7408 new_cu
.reset (new dwarf2_cu (this_cu
));
7411 /* A future optimization, if needed, would be to use an existing
7412 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7413 could share abbrev tables. */
7415 /* The abbreviation table used by READER, this must live at least as long as
7417 abbrev_table_up dwo_abbrev_table
;
7419 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7420 NULL
/* stub_comp_unit_die */,
7421 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7423 &comp_unit_die
, &has_children
,
7424 &dwo_abbrev_table
) == 0)
7430 /* All the "real" work is done here. */
7431 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7433 /* This duplicates the code in init_cutu_and_read_dies,
7434 but the alternative is making the latter more complex.
7435 This function is only for the special case of using DWO files directly:
7436 no point in overly complicating the general case just to handle this. */
7437 if (new_cu
!= NULL
&& keep
)
7439 /* Link this CU into read_in_chain. */
7440 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7441 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7442 /* The chain owns it now. */
7447 /* Initialize a CU (or TU) and read its DIEs.
7448 If the CU defers to a DWO file, read the DWO file as well.
7450 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7451 Otherwise the table specified in the comp unit header is read in and used.
7452 This is an optimization for when we already have the abbrev table.
7454 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7455 Otherwise, a new CU is allocated with xmalloc.
7457 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7458 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7460 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7461 linker) then DIE_READER_FUNC will not get called. */
7464 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7465 struct abbrev_table
*abbrev_table
,
7466 int use_existing_cu
, int keep
,
7467 die_reader_func_ftype
*die_reader_func
,
7470 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7471 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7472 struct dwarf2_section_info
*section
= this_cu
->section
;
7473 bfd
*abfd
= get_section_bfd_owner (section
);
7474 struct dwarf2_cu
*cu
;
7475 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7476 struct die_reader_specs reader
;
7477 struct die_info
*comp_unit_die
;
7479 struct attribute
*attr
;
7480 struct signatured_type
*sig_type
= NULL
;
7481 struct dwarf2_section_info
*abbrev_section
;
7482 /* Non-zero if CU currently points to a DWO file and we need to
7483 reread it. When this happens we need to reread the skeleton die
7484 before we can reread the DWO file (this only applies to CUs, not TUs). */
7485 int rereading_dwo_cu
= 0;
7487 if (dwarf_die_debug
)
7488 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7489 this_cu
->is_debug_types
? "type" : "comp",
7490 sect_offset_str (this_cu
->sect_off
));
7492 if (use_existing_cu
)
7495 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7496 file (instead of going through the stub), short-circuit all of this. */
7497 if (this_cu
->reading_dwo_directly
)
7499 /* Narrow down the scope of possibilities to have to understand. */
7500 gdb_assert (this_cu
->is_debug_types
);
7501 gdb_assert (abbrev_table
== NULL
);
7502 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7503 die_reader_func
, data
);
7507 /* This is cheap if the section is already read in. */
7508 dwarf2_read_section (objfile
, section
);
7510 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7512 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7514 std::unique_ptr
<dwarf2_cu
> new_cu
;
7515 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7518 /* If this CU is from a DWO file we need to start over, we need to
7519 refetch the attributes from the skeleton CU.
7520 This could be optimized by retrieving those attributes from when we
7521 were here the first time: the previous comp_unit_die was stored in
7522 comp_unit_obstack. But there's no data yet that we need this
7524 if (cu
->dwo_unit
!= NULL
)
7525 rereading_dwo_cu
= 1;
7529 /* If !use_existing_cu, this_cu->cu must be NULL. */
7530 gdb_assert (this_cu
->cu
== NULL
);
7531 new_cu
.reset (new dwarf2_cu (this_cu
));
7535 /* Get the header. */
7536 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7538 /* We already have the header, there's no need to read it in again. */
7539 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7543 if (this_cu
->is_debug_types
)
7545 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7546 &cu
->header
, section
,
7547 abbrev_section
, info_ptr
,
7550 /* Since per_cu is the first member of struct signatured_type,
7551 we can go from a pointer to one to a pointer to the other. */
7552 sig_type
= (struct signatured_type
*) this_cu
;
7553 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7554 gdb_assert (sig_type
->type_offset_in_tu
7555 == cu
->header
.type_cu_offset_in_tu
);
7556 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7558 /* LENGTH has not been set yet for type units if we're
7559 using .gdb_index. */
7560 this_cu
->length
= get_cu_length (&cu
->header
);
7562 /* Establish the type offset that can be used to lookup the type. */
7563 sig_type
->type_offset_in_section
=
7564 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7566 this_cu
->dwarf_version
= cu
->header
.version
;
7570 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7571 &cu
->header
, section
,
7574 rcuh_kind::COMPILE
);
7576 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7577 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7578 this_cu
->dwarf_version
= cu
->header
.version
;
7582 /* Skip dummy compilation units. */
7583 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7584 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7587 /* If we don't have them yet, read the abbrevs for this compilation unit.
7588 And if we need to read them now, make sure they're freed when we're
7589 done (own the table through ABBREV_TABLE_HOLDER). */
7590 abbrev_table_up abbrev_table_holder
;
7591 if (abbrev_table
!= NULL
)
7592 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7596 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7597 cu
->header
.abbrev_sect_off
);
7598 abbrev_table
= abbrev_table_holder
.get ();
7601 /* Read the top level CU/TU die. */
7602 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7603 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7605 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7606 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7607 table from the DWO file and pass the ownership over to us. It will be
7608 referenced from READER, so we must make sure to free it after we're done
7611 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7612 DWO CU, that this test will fail (the attribute will not be present). */
7613 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7614 abbrev_table_up dwo_abbrev_table
;
7617 struct dwo_unit
*dwo_unit
;
7618 struct die_info
*dwo_comp_unit_die
;
7622 complaint (&symfile_complaints
,
7623 _("compilation unit with DW_AT_GNU_dwo_name"
7624 " has children (offset %s) [in module %s]"),
7625 sect_offset_str (this_cu
->sect_off
),
7626 bfd_get_filename (abfd
));
7628 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7629 if (dwo_unit
!= NULL
)
7631 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7632 comp_unit_die
, NULL
,
7634 &dwo_comp_unit_die
, &has_children
,
7635 &dwo_abbrev_table
) == 0)
7640 comp_unit_die
= dwo_comp_unit_die
;
7644 /* Yikes, we couldn't find the rest of the DIE, we only have
7645 the stub. A complaint has already been logged. There's
7646 not much more we can do except pass on the stub DIE to
7647 die_reader_func. We don't want to throw an error on bad
7652 /* All of the above is setup for this call. Yikes. */
7653 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7655 /* Done, clean up. */
7656 if (new_cu
!= NULL
&& keep
)
7658 /* Link this CU into read_in_chain. */
7659 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7660 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7661 /* The chain owns it now. */
7666 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7667 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7668 to have already done the lookup to find the DWO file).
7670 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7671 THIS_CU->is_debug_types, but nothing else.
7673 We fill in THIS_CU->length.
7675 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7676 linker) then DIE_READER_FUNC will not get called.
7678 THIS_CU->cu is always freed when done.
7679 This is done in order to not leave THIS_CU->cu in a state where we have
7680 to care whether it refers to the "main" CU or the DWO CU. */
7683 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7684 struct dwo_file
*dwo_file
,
7685 die_reader_func_ftype
*die_reader_func
,
7688 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7689 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7690 struct dwarf2_section_info
*section
= this_cu
->section
;
7691 bfd
*abfd
= get_section_bfd_owner (section
);
7692 struct dwarf2_section_info
*abbrev_section
;
7693 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7694 struct die_reader_specs reader
;
7695 struct die_info
*comp_unit_die
;
7698 if (dwarf_die_debug
)
7699 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7700 this_cu
->is_debug_types
? "type" : "comp",
7701 sect_offset_str (this_cu
->sect_off
));
7703 gdb_assert (this_cu
->cu
== NULL
);
7705 abbrev_section
= (dwo_file
!= NULL
7706 ? &dwo_file
->sections
.abbrev
7707 : get_abbrev_section_for_cu (this_cu
));
7709 /* This is cheap if the section is already read in. */
7710 dwarf2_read_section (objfile
, section
);
7712 struct dwarf2_cu
cu (this_cu
);
7714 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7715 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7716 &cu
.header
, section
,
7717 abbrev_section
, info_ptr
,
7718 (this_cu
->is_debug_types
7720 : rcuh_kind::COMPILE
));
7722 this_cu
->length
= get_cu_length (&cu
.header
);
7724 /* Skip dummy compilation units. */
7725 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7726 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7729 abbrev_table_up abbrev_table
7730 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7731 cu
.header
.abbrev_sect_off
);
7733 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7734 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7736 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7739 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7740 does not lookup the specified DWO file.
7741 This cannot be used to read DWO files.
7743 THIS_CU->cu is always freed when done.
7744 This is done in order to not leave THIS_CU->cu in a state where we have
7745 to care whether it refers to the "main" CU or the DWO CU.
7746 We can revisit this if the data shows there's a performance issue. */
7749 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7750 die_reader_func_ftype
*die_reader_func
,
7753 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7756 /* Type Unit Groups.
7758 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7759 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7760 so that all types coming from the same compilation (.o file) are grouped
7761 together. A future step could be to put the types in the same symtab as
7762 the CU the types ultimately came from. */
7765 hash_type_unit_group (const void *item
)
7767 const struct type_unit_group
*tu_group
7768 = (const struct type_unit_group
*) item
;
7770 return hash_stmt_list_entry (&tu_group
->hash
);
7774 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7776 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7777 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7779 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7782 /* Allocate a hash table for type unit groups. */
7785 allocate_type_unit_groups_table (struct objfile
*objfile
)
7787 return htab_create_alloc_ex (3,
7788 hash_type_unit_group
,
7791 &objfile
->objfile_obstack
,
7792 hashtab_obstack_allocate
,
7793 dummy_obstack_deallocate
);
7796 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7797 partial symtabs. We combine several TUs per psymtab to not let the size
7798 of any one psymtab grow too big. */
7799 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7800 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7802 /* Helper routine for get_type_unit_group.
7803 Create the type_unit_group object used to hold one or more TUs. */
7805 static struct type_unit_group
*
7806 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7808 struct dwarf2_per_objfile
*dwarf2_per_objfile
7809 = cu
->per_cu
->dwarf2_per_objfile
;
7810 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7811 struct dwarf2_per_cu_data
*per_cu
;
7812 struct type_unit_group
*tu_group
;
7814 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7815 struct type_unit_group
);
7816 per_cu
= &tu_group
->per_cu
;
7817 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7819 if (dwarf2_per_objfile
->using_index
)
7821 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7822 struct dwarf2_per_cu_quick_data
);
7826 unsigned int line_offset
= to_underlying (line_offset_struct
);
7827 struct partial_symtab
*pst
;
7830 /* Give the symtab a useful name for debug purposes. */
7831 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7832 name
= xstrprintf ("<type_units_%d>",
7833 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7835 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7837 pst
= create_partial_symtab (per_cu
, name
);
7843 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7844 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7849 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7850 STMT_LIST is a DW_AT_stmt_list attribute. */
7852 static struct type_unit_group
*
7853 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7855 struct dwarf2_per_objfile
*dwarf2_per_objfile
7856 = cu
->per_cu
->dwarf2_per_objfile
;
7857 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7858 struct type_unit_group
*tu_group
;
7860 unsigned int line_offset
;
7861 struct type_unit_group type_unit_group_for_lookup
;
7863 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7865 dwarf2_per_objfile
->type_unit_groups
=
7866 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7869 /* Do we need to create a new group, or can we use an existing one? */
7873 line_offset
= DW_UNSND (stmt_list
);
7874 ++tu_stats
->nr_symtab_sharers
;
7878 /* Ugh, no stmt_list. Rare, but we have to handle it.
7879 We can do various things here like create one group per TU or
7880 spread them over multiple groups to split up the expansion work.
7881 To avoid worst case scenarios (too many groups or too large groups)
7882 we, umm, group them in bunches. */
7883 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7884 | (tu_stats
->nr_stmt_less_type_units
7885 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7886 ++tu_stats
->nr_stmt_less_type_units
;
7889 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7890 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7891 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7892 &type_unit_group_for_lookup
, INSERT
);
7895 tu_group
= (struct type_unit_group
*) *slot
;
7896 gdb_assert (tu_group
!= NULL
);
7900 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7901 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7903 ++tu_stats
->nr_symtabs
;
7909 /* Partial symbol tables. */
7911 /* Create a psymtab named NAME and assign it to PER_CU.
7913 The caller must fill in the following details:
7914 dirname, textlow, texthigh. */
7916 static struct partial_symtab
*
7917 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7919 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7920 struct partial_symtab
*pst
;
7922 pst
= start_psymtab_common (objfile
, name
, 0,
7923 objfile
->global_psymbols
,
7924 objfile
->static_psymbols
);
7926 pst
->psymtabs_addrmap_supported
= 1;
7928 /* This is the glue that links PST into GDB's symbol API. */
7929 pst
->read_symtab_private
= per_cu
;
7930 pst
->read_symtab
= dwarf2_read_symtab
;
7931 per_cu
->v
.psymtab
= pst
;
7936 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7939 struct process_psymtab_comp_unit_data
7941 /* True if we are reading a DW_TAG_partial_unit. */
7943 int want_partial_unit
;
7945 /* The "pretend" language that is used if the CU doesn't declare a
7948 enum language pretend_language
;
7951 /* die_reader_func for process_psymtab_comp_unit. */
7954 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7955 const gdb_byte
*info_ptr
,
7956 struct die_info
*comp_unit_die
,
7960 struct dwarf2_cu
*cu
= reader
->cu
;
7961 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7962 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7963 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7965 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7966 struct partial_symtab
*pst
;
7967 enum pc_bounds_kind cu_bounds_kind
;
7968 const char *filename
;
7969 struct process_psymtab_comp_unit_data
*info
7970 = (struct process_psymtab_comp_unit_data
*) data
;
7972 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7975 gdb_assert (! per_cu
->is_debug_types
);
7977 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7979 cu
->list_in_scope
= &file_symbols
;
7981 /* Allocate a new partial symbol table structure. */
7982 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7983 if (filename
== NULL
)
7986 pst
= create_partial_symtab (per_cu
, filename
);
7988 /* This must be done before calling dwarf2_build_include_psymtabs. */
7989 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7991 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7993 dwarf2_find_base_address (comp_unit_die
, cu
);
7995 /* Possibly set the default values of LOWPC and HIGHPC from
7997 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7998 &best_highpc
, cu
, pst
);
7999 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8000 /* Store the contiguous range if it is not empty; it can be empty for
8001 CUs with no code. */
8002 addrmap_set_empty (objfile
->psymtabs_addrmap
,
8003 gdbarch_adjust_dwarf2_addr (gdbarch
,
8004 best_lowpc
+ baseaddr
),
8005 gdbarch_adjust_dwarf2_addr (gdbarch
,
8006 best_highpc
+ baseaddr
) - 1,
8009 /* Check if comp unit has_children.
8010 If so, read the rest of the partial symbols from this comp unit.
8011 If not, there's no more debug_info for this comp unit. */
8014 struct partial_die_info
*first_die
;
8015 CORE_ADDR lowpc
, highpc
;
8017 lowpc
= ((CORE_ADDR
) -1);
8018 highpc
= ((CORE_ADDR
) 0);
8020 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8022 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8023 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8025 /* If we didn't find a lowpc, set it to highpc to avoid
8026 complaints from `maint check'. */
8027 if (lowpc
== ((CORE_ADDR
) -1))
8030 /* If the compilation unit didn't have an explicit address range,
8031 then use the information extracted from its child dies. */
8032 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8035 best_highpc
= highpc
;
8038 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
8039 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
8041 end_psymtab_common (objfile
, pst
);
8043 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8046 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8047 struct dwarf2_per_cu_data
*iter
;
8049 /* Fill in 'dependencies' here; we fill in 'users' in a
8051 pst
->number_of_dependencies
= len
;
8053 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8055 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8058 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8060 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8063 /* Get the list of files included in the current compilation unit,
8064 and build a psymtab for each of them. */
8065 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8067 if (dwarf_read_debug
)
8069 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8071 fprintf_unfiltered (gdb_stdlog
,
8072 "Psymtab for %s unit @%s: %s - %s"
8073 ", %d global, %d static syms\n",
8074 per_cu
->is_debug_types
? "type" : "comp",
8075 sect_offset_str (per_cu
->sect_off
),
8076 paddress (gdbarch
, pst
->textlow
),
8077 paddress (gdbarch
, pst
->texthigh
),
8078 pst
->n_global_syms
, pst
->n_static_syms
);
8082 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8083 Process compilation unit THIS_CU for a psymtab. */
8086 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8087 int want_partial_unit
,
8088 enum language pretend_language
)
8090 /* If this compilation unit was already read in, free the
8091 cached copy in order to read it in again. This is
8092 necessary because we skipped some symbols when we first
8093 read in the compilation unit (see load_partial_dies).
8094 This problem could be avoided, but the benefit is unclear. */
8095 if (this_cu
->cu
!= NULL
)
8096 free_one_cached_comp_unit (this_cu
);
8098 if (this_cu
->is_debug_types
)
8099 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
8103 process_psymtab_comp_unit_data info
;
8104 info
.want_partial_unit
= want_partial_unit
;
8105 info
.pretend_language
= pretend_language
;
8106 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
8107 process_psymtab_comp_unit_reader
, &info
);
8110 /* Age out any secondary CUs. */
8111 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8114 /* Reader function for build_type_psymtabs. */
8117 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8118 const gdb_byte
*info_ptr
,
8119 struct die_info
*type_unit_die
,
8123 struct dwarf2_per_objfile
*dwarf2_per_objfile
8124 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8125 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8126 struct dwarf2_cu
*cu
= reader
->cu
;
8127 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8128 struct signatured_type
*sig_type
;
8129 struct type_unit_group
*tu_group
;
8130 struct attribute
*attr
;
8131 struct partial_die_info
*first_die
;
8132 CORE_ADDR lowpc
, highpc
;
8133 struct partial_symtab
*pst
;
8135 gdb_assert (data
== NULL
);
8136 gdb_assert (per_cu
->is_debug_types
);
8137 sig_type
= (struct signatured_type
*) per_cu
;
8142 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8143 tu_group
= get_type_unit_group (cu
, attr
);
8145 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8147 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8148 cu
->list_in_scope
= &file_symbols
;
8149 pst
= create_partial_symtab (per_cu
, "");
8152 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8154 lowpc
= (CORE_ADDR
) -1;
8155 highpc
= (CORE_ADDR
) 0;
8156 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8158 end_psymtab_common (objfile
, pst
);
8161 /* Struct used to sort TUs by their abbreviation table offset. */
8163 struct tu_abbrev_offset
8165 struct signatured_type
*sig_type
;
8166 sect_offset abbrev_offset
;
8169 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8172 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8173 const struct tu_abbrev_offset
&b
)
8175 return a
.abbrev_offset
< b
.abbrev_offset
;
8178 /* Efficiently read all the type units.
8179 This does the bulk of the work for build_type_psymtabs.
8181 The efficiency is because we sort TUs by the abbrev table they use and
8182 only read each abbrev table once. In one program there are 200K TUs
8183 sharing 8K abbrev tables.
8185 The main purpose of this function is to support building the
8186 dwarf2_per_objfile->type_unit_groups table.
8187 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8188 can collapse the search space by grouping them by stmt_list.
8189 The savings can be significant, in the same program from above the 200K TUs
8190 share 8K stmt_list tables.
8192 FUNC is expected to call get_type_unit_group, which will create the
8193 struct type_unit_group if necessary and add it to
8194 dwarf2_per_objfile->type_unit_groups. */
8197 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8199 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8200 abbrev_table_up abbrev_table
;
8201 sect_offset abbrev_offset
;
8204 /* It's up to the caller to not call us multiple times. */
8205 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8207 if (dwarf2_per_objfile
->n_type_units
== 0)
8210 /* TUs typically share abbrev tables, and there can be way more TUs than
8211 abbrev tables. Sort by abbrev table to reduce the number of times we
8212 read each abbrev table in.
8213 Alternatives are to punt or to maintain a cache of abbrev tables.
8214 This is simpler and efficient enough for now.
8216 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8217 symtab to use). Typically TUs with the same abbrev offset have the same
8218 stmt_list value too so in practice this should work well.
8220 The basic algorithm here is:
8222 sort TUs by abbrev table
8223 for each TU with same abbrev table:
8224 read abbrev table if first user
8225 read TU top level DIE
8226 [IWBN if DWO skeletons had DW_AT_stmt_list]
8229 if (dwarf_read_debug
)
8230 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8232 /* Sort in a separate table to maintain the order of all_type_units
8233 for .gdb_index: TU indices directly index all_type_units. */
8234 std::vector
<struct tu_abbrev_offset
> sorted_by_abbrev
8235 (dwarf2_per_objfile
->n_type_units
);
8236 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
8238 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
8240 sorted_by_abbrev
[i
].sig_type
= sig_type
;
8241 sorted_by_abbrev
[i
].abbrev_offset
=
8242 read_abbrev_offset (dwarf2_per_objfile
,
8243 sig_type
->per_cu
.section
,
8244 sig_type
->per_cu
.sect_off
);
8246 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8247 sort_tu_by_abbrev_offset
);
8249 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8251 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
8253 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
8255 /* Switch to the next abbrev table if necessary. */
8256 if (abbrev_table
== NULL
8257 || tu
->abbrev_offset
!= abbrev_offset
)
8259 abbrev_offset
= tu
->abbrev_offset
;
8261 abbrev_table_read_table (dwarf2_per_objfile
,
8262 &dwarf2_per_objfile
->abbrev
,
8264 ++tu_stats
->nr_uniq_abbrev_tables
;
8267 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
.get (),
8268 0, 0, build_type_psymtabs_reader
, NULL
);
8272 /* Print collected type unit statistics. */
8275 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8277 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8279 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8280 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
8281 dwarf2_per_objfile
->n_type_units
);
8282 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8283 tu_stats
->nr_uniq_abbrev_tables
);
8284 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8285 tu_stats
->nr_symtabs
);
8286 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8287 tu_stats
->nr_symtab_sharers
);
8288 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8289 tu_stats
->nr_stmt_less_type_units
);
8290 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8291 tu_stats
->nr_all_type_units_reallocs
);
8294 /* Traversal function for build_type_psymtabs. */
8297 build_type_psymtab_dependencies (void **slot
, void *info
)
8299 struct dwarf2_per_objfile
*dwarf2_per_objfile
8300 = (struct dwarf2_per_objfile
*) info
;
8301 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8302 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8303 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8304 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8305 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8306 struct signatured_type
*iter
;
8309 gdb_assert (len
> 0);
8310 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8312 pst
->number_of_dependencies
= len
;
8314 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8316 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8319 gdb_assert (iter
->per_cu
.is_debug_types
);
8320 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8321 iter
->type_unit_group
= tu_group
;
8324 VEC_free (sig_type_ptr
, tu_group
->tus
);
8329 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8330 Build partial symbol tables for the .debug_types comp-units. */
8333 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8335 if (! create_all_type_units (dwarf2_per_objfile
))
8338 build_type_psymtabs_1 (dwarf2_per_objfile
);
8341 /* Traversal function for process_skeletonless_type_unit.
8342 Read a TU in a DWO file and build partial symbols for it. */
8345 process_skeletonless_type_unit (void **slot
, void *info
)
8347 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8348 struct dwarf2_per_objfile
*dwarf2_per_objfile
8349 = (struct dwarf2_per_objfile
*) info
;
8350 struct signatured_type find_entry
, *entry
;
8352 /* If this TU doesn't exist in the global table, add it and read it in. */
8354 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8356 dwarf2_per_objfile
->signatured_types
8357 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8360 find_entry
.signature
= dwo_unit
->signature
;
8361 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8363 /* If we've already seen this type there's nothing to do. What's happening
8364 is we're doing our own version of comdat-folding here. */
8368 /* This does the job that create_all_type_units would have done for
8370 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8371 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8374 /* This does the job that build_type_psymtabs_1 would have done. */
8375 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
8376 build_type_psymtabs_reader
, NULL
);
8381 /* Traversal function for process_skeletonless_type_units. */
8384 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8386 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8388 if (dwo_file
->tus
!= NULL
)
8390 htab_traverse_noresize (dwo_file
->tus
,
8391 process_skeletonless_type_unit
, info
);
8397 /* Scan all TUs of DWO files, verifying we've processed them.
8398 This is needed in case a TU was emitted without its skeleton.
8399 Note: This can't be done until we know what all the DWO files are. */
8402 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8404 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8405 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8406 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8408 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8409 process_dwo_file_for_skeletonless_type_units
,
8410 dwarf2_per_objfile
);
8414 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8417 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8421 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
8423 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (i
);
8424 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8430 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8432 /* Set the 'user' field only if it is not already set. */
8433 if (pst
->dependencies
[j
]->user
== NULL
)
8434 pst
->dependencies
[j
]->user
= pst
;
8439 /* Build the partial symbol table by doing a quick pass through the
8440 .debug_info and .debug_abbrev sections. */
8443 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8446 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8448 if (dwarf_read_debug
)
8450 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8451 objfile_name (objfile
));
8454 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8456 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8458 /* Any cached compilation units will be linked by the per-objfile
8459 read_in_chain. Make sure to free them when we're done. */
8460 free_cached_comp_units
freer (dwarf2_per_objfile
);
8462 build_type_psymtabs (dwarf2_per_objfile
);
8464 create_all_comp_units (dwarf2_per_objfile
);
8466 /* Create a temporary address map on a temporary obstack. We later
8467 copy this to the final obstack. */
8468 auto_obstack temp_obstack
;
8470 scoped_restore save_psymtabs_addrmap
8471 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8472 addrmap_create_mutable (&temp_obstack
));
8474 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
8476 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cu (i
);
8478 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8481 /* This has to wait until we read the CUs, we need the list of DWOs. */
8482 process_skeletonless_type_units (dwarf2_per_objfile
);
8484 /* Now that all TUs have been processed we can fill in the dependencies. */
8485 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8487 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8488 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8491 if (dwarf_read_debug
)
8492 print_tu_stats (dwarf2_per_objfile
);
8494 set_partial_user (dwarf2_per_objfile
);
8496 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8497 &objfile
->objfile_obstack
);
8498 /* At this point we want to keep the address map. */
8499 save_psymtabs_addrmap
.release ();
8501 if (dwarf_read_debug
)
8502 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8503 objfile_name (objfile
));
8506 /* die_reader_func for load_partial_comp_unit. */
8509 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8510 const gdb_byte
*info_ptr
,
8511 struct die_info
*comp_unit_die
,
8515 struct dwarf2_cu
*cu
= reader
->cu
;
8517 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8519 /* Check if comp unit has_children.
8520 If so, read the rest of the partial symbols from this comp unit.
8521 If not, there's no more debug_info for this comp unit. */
8523 load_partial_dies (reader
, info_ptr
, 0);
8526 /* Load the partial DIEs for a secondary CU into memory.
8527 This is also used when rereading a primary CU with load_all_dies. */
8530 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8532 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8533 load_partial_comp_unit_reader
, NULL
);
8537 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8538 struct dwarf2_section_info
*section
,
8539 struct dwarf2_section_info
*abbrev_section
,
8540 unsigned int is_dwz
,
8543 struct dwarf2_per_cu_data
***all_comp_units
)
8545 const gdb_byte
*info_ptr
;
8546 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8548 if (dwarf_read_debug
)
8549 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8550 get_section_name (section
),
8551 get_section_file_name (section
));
8553 dwarf2_read_section (objfile
, section
);
8555 info_ptr
= section
->buffer
;
8557 while (info_ptr
< section
->buffer
+ section
->size
)
8559 struct dwarf2_per_cu_data
*this_cu
;
8561 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8563 comp_unit_head cu_header
;
8564 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8565 abbrev_section
, info_ptr
,
8566 rcuh_kind::COMPILE
);
8568 /* Save the compilation unit for later lookup. */
8569 if (cu_header
.unit_type
!= DW_UT_type
)
8571 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8572 struct dwarf2_per_cu_data
);
8573 memset (this_cu
, 0, sizeof (*this_cu
));
8577 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8578 struct signatured_type
);
8579 memset (sig_type
, 0, sizeof (*sig_type
));
8580 sig_type
->signature
= cu_header
.signature
;
8581 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8582 this_cu
= &sig_type
->per_cu
;
8584 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8585 this_cu
->sect_off
= sect_off
;
8586 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8587 this_cu
->is_dwz
= is_dwz
;
8588 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8589 this_cu
->section
= section
;
8591 if (*n_comp_units
== *n_allocated
)
8594 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
8595 *all_comp_units
, *n_allocated
);
8597 (*all_comp_units
)[*n_comp_units
] = this_cu
;
8600 info_ptr
= info_ptr
+ this_cu
->length
;
8604 /* Create a list of all compilation units in OBJFILE.
8605 This is only done for -readnow and building partial symtabs. */
8608 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8612 struct dwarf2_per_cu_data
**all_comp_units
;
8613 struct dwz_file
*dwz
;
8614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8618 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
8620 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8621 &dwarf2_per_objfile
->abbrev
, 0,
8622 &n_allocated
, &n_comp_units
, &all_comp_units
);
8624 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8626 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8627 1, &n_allocated
, &n_comp_units
,
8630 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
8631 struct dwarf2_per_cu_data
*,
8633 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
8634 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
8635 xfree (all_comp_units
);
8636 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
8639 /* Process all loaded DIEs for compilation unit CU, starting at
8640 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8641 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8642 DW_AT_ranges). See the comments of add_partial_subprogram on how
8643 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8646 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8647 CORE_ADDR
*highpc
, int set_addrmap
,
8648 struct dwarf2_cu
*cu
)
8650 struct partial_die_info
*pdi
;
8652 /* Now, march along the PDI's, descending into ones which have
8653 interesting children but skipping the children of the other ones,
8654 until we reach the end of the compilation unit. */
8662 /* Anonymous namespaces or modules have no name but have interesting
8663 children, so we need to look at them. Ditto for anonymous
8666 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8667 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8668 || pdi
->tag
== DW_TAG_imported_unit
8669 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8673 case DW_TAG_subprogram
:
8674 case DW_TAG_inlined_subroutine
:
8675 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8677 case DW_TAG_constant
:
8678 case DW_TAG_variable
:
8679 case DW_TAG_typedef
:
8680 case DW_TAG_union_type
:
8681 if (!pdi
->is_declaration
)
8683 add_partial_symbol (pdi
, cu
);
8686 case DW_TAG_class_type
:
8687 case DW_TAG_interface_type
:
8688 case DW_TAG_structure_type
:
8689 if (!pdi
->is_declaration
)
8691 add_partial_symbol (pdi
, cu
);
8693 if ((cu
->language
== language_rust
8694 || cu
->language
== language_cplus
) && pdi
->has_children
)
8695 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8698 case DW_TAG_enumeration_type
:
8699 if (!pdi
->is_declaration
)
8700 add_partial_enumeration (pdi
, cu
);
8702 case DW_TAG_base_type
:
8703 case DW_TAG_subrange_type
:
8704 /* File scope base type definitions are added to the partial
8706 add_partial_symbol (pdi
, cu
);
8708 case DW_TAG_namespace
:
8709 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8712 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8714 case DW_TAG_imported_unit
:
8716 struct dwarf2_per_cu_data
*per_cu
;
8718 /* For now we don't handle imported units in type units. */
8719 if (cu
->per_cu
->is_debug_types
)
8721 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8722 " supported in type units [in module %s]"),
8723 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8726 per_cu
= dwarf2_find_containing_comp_unit
8727 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8728 cu
->per_cu
->dwarf2_per_objfile
);
8730 /* Go read the partial unit, if needed. */
8731 if (per_cu
->v
.psymtab
== NULL
)
8732 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8734 VEC_safe_push (dwarf2_per_cu_ptr
,
8735 cu
->per_cu
->imported_symtabs
, per_cu
);
8738 case DW_TAG_imported_declaration
:
8739 add_partial_symbol (pdi
, cu
);
8746 /* If the die has a sibling, skip to the sibling. */
8748 pdi
= pdi
->die_sibling
;
8752 /* Functions used to compute the fully scoped name of a partial DIE.
8754 Normally, this is simple. For C++, the parent DIE's fully scoped
8755 name is concatenated with "::" and the partial DIE's name.
8756 Enumerators are an exception; they use the scope of their parent
8757 enumeration type, i.e. the name of the enumeration type is not
8758 prepended to the enumerator.
8760 There are two complexities. One is DW_AT_specification; in this
8761 case "parent" means the parent of the target of the specification,
8762 instead of the direct parent of the DIE. The other is compilers
8763 which do not emit DW_TAG_namespace; in this case we try to guess
8764 the fully qualified name of structure types from their members'
8765 linkage names. This must be done using the DIE's children rather
8766 than the children of any DW_AT_specification target. We only need
8767 to do this for structures at the top level, i.e. if the target of
8768 any DW_AT_specification (if any; otherwise the DIE itself) does not
8771 /* Compute the scope prefix associated with PDI's parent, in
8772 compilation unit CU. The result will be allocated on CU's
8773 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8774 field. NULL is returned if no prefix is necessary. */
8776 partial_die_parent_scope (struct partial_die_info
*pdi
,
8777 struct dwarf2_cu
*cu
)
8779 const char *grandparent_scope
;
8780 struct partial_die_info
*parent
, *real_pdi
;
8782 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8783 then this means the parent of the specification DIE. */
8786 while (real_pdi
->has_specification
)
8787 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8788 real_pdi
->spec_is_dwz
, cu
);
8790 parent
= real_pdi
->die_parent
;
8794 if (parent
->scope_set
)
8795 return parent
->scope
;
8799 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8801 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8802 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8803 Work around this problem here. */
8804 if (cu
->language
== language_cplus
8805 && parent
->tag
== DW_TAG_namespace
8806 && strcmp (parent
->name
, "::") == 0
8807 && grandparent_scope
== NULL
)
8809 parent
->scope
= NULL
;
8810 parent
->scope_set
= 1;
8814 if (pdi
->tag
== DW_TAG_enumerator
)
8815 /* Enumerators should not get the name of the enumeration as a prefix. */
8816 parent
->scope
= grandparent_scope
;
8817 else if (parent
->tag
== DW_TAG_namespace
8818 || parent
->tag
== DW_TAG_module
8819 || parent
->tag
== DW_TAG_structure_type
8820 || parent
->tag
== DW_TAG_class_type
8821 || parent
->tag
== DW_TAG_interface_type
8822 || parent
->tag
== DW_TAG_union_type
8823 || parent
->tag
== DW_TAG_enumeration_type
)
8825 if (grandparent_scope
== NULL
)
8826 parent
->scope
= parent
->name
;
8828 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8830 parent
->name
, 0, cu
);
8834 /* FIXME drow/2004-04-01: What should we be doing with
8835 function-local names? For partial symbols, we should probably be
8837 complaint (&symfile_complaints
,
8838 _("unhandled containing DIE tag %d for DIE at %s"),
8839 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8840 parent
->scope
= grandparent_scope
;
8843 parent
->scope_set
= 1;
8844 return parent
->scope
;
8847 /* Return the fully scoped name associated with PDI, from compilation unit
8848 CU. The result will be allocated with malloc. */
8851 partial_die_full_name (struct partial_die_info
*pdi
,
8852 struct dwarf2_cu
*cu
)
8854 const char *parent_scope
;
8856 /* If this is a template instantiation, we can not work out the
8857 template arguments from partial DIEs. So, unfortunately, we have
8858 to go through the full DIEs. At least any work we do building
8859 types here will be reused if full symbols are loaded later. */
8860 if (pdi
->has_template_arguments
)
8864 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8866 struct die_info
*die
;
8867 struct attribute attr
;
8868 struct dwarf2_cu
*ref_cu
= cu
;
8870 /* DW_FORM_ref_addr is using section offset. */
8871 attr
.name
= (enum dwarf_attribute
) 0;
8872 attr
.form
= DW_FORM_ref_addr
;
8873 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8874 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8876 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8880 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8881 if (parent_scope
== NULL
)
8884 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8888 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8890 struct dwarf2_per_objfile
*dwarf2_per_objfile
8891 = cu
->per_cu
->dwarf2_per_objfile
;
8892 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8893 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8895 const char *actual_name
= NULL
;
8897 char *built_actual_name
;
8899 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8901 built_actual_name
= partial_die_full_name (pdi
, cu
);
8902 if (built_actual_name
!= NULL
)
8903 actual_name
= built_actual_name
;
8905 if (actual_name
== NULL
)
8906 actual_name
= pdi
->name
;
8910 case DW_TAG_inlined_subroutine
:
8911 case DW_TAG_subprogram
:
8912 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8913 if (pdi
->is_external
|| cu
->language
== language_ada
)
8915 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8916 of the global scope. But in Ada, we want to be able to access
8917 nested procedures globally. So all Ada subprograms are stored
8918 in the global scope. */
8919 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8920 built_actual_name
!= NULL
,
8921 VAR_DOMAIN
, LOC_BLOCK
,
8922 &objfile
->global_psymbols
,
8923 addr
, cu
->language
, objfile
);
8927 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8928 built_actual_name
!= NULL
,
8929 VAR_DOMAIN
, LOC_BLOCK
,
8930 &objfile
->static_psymbols
,
8931 addr
, cu
->language
, objfile
);
8934 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8935 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8937 case DW_TAG_constant
:
8939 std::vector
<partial_symbol
*> *list
;
8941 if (pdi
->is_external
)
8942 list
= &objfile
->global_psymbols
;
8944 list
= &objfile
->static_psymbols
;
8945 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8946 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8947 list
, 0, cu
->language
, objfile
);
8950 case DW_TAG_variable
:
8952 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8956 && !dwarf2_per_objfile
->has_section_at_zero
)
8958 /* A global or static variable may also have been stripped
8959 out by the linker if unused, in which case its address
8960 will be nullified; do not add such variables into partial
8961 symbol table then. */
8963 else if (pdi
->is_external
)
8966 Don't enter into the minimal symbol tables as there is
8967 a minimal symbol table entry from the ELF symbols already.
8968 Enter into partial symbol table if it has a location
8969 descriptor or a type.
8970 If the location descriptor is missing, new_symbol will create
8971 a LOC_UNRESOLVED symbol, the address of the variable will then
8972 be determined from the minimal symbol table whenever the variable
8974 The address for the partial symbol table entry is not
8975 used by GDB, but it comes in handy for debugging partial symbol
8978 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8979 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8980 built_actual_name
!= NULL
,
8981 VAR_DOMAIN
, LOC_STATIC
,
8982 &objfile
->global_psymbols
,
8984 cu
->language
, objfile
);
8988 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8990 /* Static Variable. Skip symbols whose value we cannot know (those
8991 without location descriptors or constant values). */
8992 if (!has_loc
&& !pdi
->has_const_value
)
8994 xfree (built_actual_name
);
8998 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8999 built_actual_name
!= NULL
,
9000 VAR_DOMAIN
, LOC_STATIC
,
9001 &objfile
->static_psymbols
,
9002 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
9003 cu
->language
, objfile
);
9006 case DW_TAG_typedef
:
9007 case DW_TAG_base_type
:
9008 case DW_TAG_subrange_type
:
9009 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9010 built_actual_name
!= NULL
,
9011 VAR_DOMAIN
, LOC_TYPEDEF
,
9012 &objfile
->static_psymbols
,
9013 0, cu
->language
, objfile
);
9015 case DW_TAG_imported_declaration
:
9016 case DW_TAG_namespace
:
9017 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9018 built_actual_name
!= NULL
,
9019 VAR_DOMAIN
, LOC_TYPEDEF
,
9020 &objfile
->global_psymbols
,
9021 0, cu
->language
, objfile
);
9024 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9025 built_actual_name
!= NULL
,
9026 MODULE_DOMAIN
, LOC_TYPEDEF
,
9027 &objfile
->global_psymbols
,
9028 0, cu
->language
, objfile
);
9030 case DW_TAG_class_type
:
9031 case DW_TAG_interface_type
:
9032 case DW_TAG_structure_type
:
9033 case DW_TAG_union_type
:
9034 case DW_TAG_enumeration_type
:
9035 /* Skip external references. The DWARF standard says in the section
9036 about "Structure, Union, and Class Type Entries": "An incomplete
9037 structure, union or class type is represented by a structure,
9038 union or class entry that does not have a byte size attribute
9039 and that has a DW_AT_declaration attribute." */
9040 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9042 xfree (built_actual_name
);
9046 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9047 static vs. global. */
9048 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9049 built_actual_name
!= NULL
,
9050 STRUCT_DOMAIN
, LOC_TYPEDEF
,
9051 cu
->language
== language_cplus
9052 ? &objfile
->global_psymbols
9053 : &objfile
->static_psymbols
,
9054 0, cu
->language
, objfile
);
9057 case DW_TAG_enumerator
:
9058 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9059 built_actual_name
!= NULL
,
9060 VAR_DOMAIN
, LOC_CONST
,
9061 cu
->language
== language_cplus
9062 ? &objfile
->global_psymbols
9063 : &objfile
->static_psymbols
,
9064 0, cu
->language
, objfile
);
9070 xfree (built_actual_name
);
9073 /* Read a partial die corresponding to a namespace; also, add a symbol
9074 corresponding to that namespace to the symbol table. NAMESPACE is
9075 the name of the enclosing namespace. */
9078 add_partial_namespace (struct partial_die_info
*pdi
,
9079 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9080 int set_addrmap
, struct dwarf2_cu
*cu
)
9082 /* Add a symbol for the namespace. */
9084 add_partial_symbol (pdi
, cu
);
9086 /* Now scan partial symbols in that namespace. */
9088 if (pdi
->has_children
)
9089 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9092 /* Read a partial die corresponding to a Fortran module. */
9095 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9096 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9098 /* Add a symbol for the namespace. */
9100 add_partial_symbol (pdi
, cu
);
9102 /* Now scan partial symbols in that module. */
9104 if (pdi
->has_children
)
9105 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9108 /* Read a partial die corresponding to a subprogram or an inlined
9109 subprogram and create a partial symbol for that subprogram.
9110 When the CU language allows it, this routine also defines a partial
9111 symbol for each nested subprogram that this subprogram contains.
9112 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9113 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9115 PDI may also be a lexical block, in which case we simply search
9116 recursively for subprograms defined inside that lexical block.
9117 Again, this is only performed when the CU language allows this
9118 type of definitions. */
9121 add_partial_subprogram (struct partial_die_info
*pdi
,
9122 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9123 int set_addrmap
, struct dwarf2_cu
*cu
)
9125 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9127 if (pdi
->has_pc_info
)
9129 if (pdi
->lowpc
< *lowpc
)
9130 *lowpc
= pdi
->lowpc
;
9131 if (pdi
->highpc
> *highpc
)
9132 *highpc
= pdi
->highpc
;
9135 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9136 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9141 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9142 SECT_OFF_TEXT (objfile
));
9143 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9144 pdi
->lowpc
+ baseaddr
);
9145 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9146 pdi
->highpc
+ baseaddr
);
9147 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9148 cu
->per_cu
->v
.psymtab
);
9152 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9154 if (!pdi
->is_declaration
)
9155 /* Ignore subprogram DIEs that do not have a name, they are
9156 illegal. Do not emit a complaint at this point, we will
9157 do so when we convert this psymtab into a symtab. */
9159 add_partial_symbol (pdi
, cu
);
9163 if (! pdi
->has_children
)
9166 if (cu
->language
== language_ada
)
9168 pdi
= pdi
->die_child
;
9172 if (pdi
->tag
== DW_TAG_subprogram
9173 || pdi
->tag
== DW_TAG_inlined_subroutine
9174 || pdi
->tag
== DW_TAG_lexical_block
)
9175 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9176 pdi
= pdi
->die_sibling
;
9181 /* Read a partial die corresponding to an enumeration type. */
9184 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9185 struct dwarf2_cu
*cu
)
9187 struct partial_die_info
*pdi
;
9189 if (enum_pdi
->name
!= NULL
)
9190 add_partial_symbol (enum_pdi
, cu
);
9192 pdi
= enum_pdi
->die_child
;
9195 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9196 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
9198 add_partial_symbol (pdi
, cu
);
9199 pdi
= pdi
->die_sibling
;
9203 /* Return the initial uleb128 in the die at INFO_PTR. */
9206 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9208 unsigned int bytes_read
;
9210 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9213 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9214 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9216 Return the corresponding abbrev, or NULL if the number is zero (indicating
9217 an empty DIE). In either case *BYTES_READ will be set to the length of
9218 the initial number. */
9220 static struct abbrev_info
*
9221 peek_die_abbrev (const die_reader_specs
&reader
,
9222 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9224 dwarf2_cu
*cu
= reader
.cu
;
9225 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9226 unsigned int abbrev_number
9227 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9229 if (abbrev_number
== 0)
9232 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9235 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9236 " at offset %s [in module %s]"),
9237 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9238 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9244 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9245 Returns a pointer to the end of a series of DIEs, terminated by an empty
9246 DIE. Any children of the skipped DIEs will also be skipped. */
9248 static const gdb_byte
*
9249 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9253 unsigned int bytes_read
;
9254 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9257 return info_ptr
+ bytes_read
;
9259 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9263 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9264 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9265 abbrev corresponding to that skipped uleb128 should be passed in
9266 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9269 static const gdb_byte
*
9270 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9271 struct abbrev_info
*abbrev
)
9273 unsigned int bytes_read
;
9274 struct attribute attr
;
9275 bfd
*abfd
= reader
->abfd
;
9276 struct dwarf2_cu
*cu
= reader
->cu
;
9277 const gdb_byte
*buffer
= reader
->buffer
;
9278 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9279 unsigned int form
, i
;
9281 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9283 /* The only abbrev we care about is DW_AT_sibling. */
9284 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9286 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9287 if (attr
.form
== DW_FORM_ref_addr
)
9288 complaint (&symfile_complaints
,
9289 _("ignoring absolute DW_AT_sibling"));
9292 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9293 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9295 if (sibling_ptr
< info_ptr
)
9296 complaint (&symfile_complaints
,
9297 _("DW_AT_sibling points backwards"));
9298 else if (sibling_ptr
> reader
->buffer_end
)
9299 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9305 /* If it isn't DW_AT_sibling, skip this attribute. */
9306 form
= abbrev
->attrs
[i
].form
;
9310 case DW_FORM_ref_addr
:
9311 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9312 and later it is offset sized. */
9313 if (cu
->header
.version
== 2)
9314 info_ptr
+= cu
->header
.addr_size
;
9316 info_ptr
+= cu
->header
.offset_size
;
9318 case DW_FORM_GNU_ref_alt
:
9319 info_ptr
+= cu
->header
.offset_size
;
9322 info_ptr
+= cu
->header
.addr_size
;
9329 case DW_FORM_flag_present
:
9330 case DW_FORM_implicit_const
:
9342 case DW_FORM_ref_sig8
:
9345 case DW_FORM_data16
:
9348 case DW_FORM_string
:
9349 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9350 info_ptr
+= bytes_read
;
9352 case DW_FORM_sec_offset
:
9354 case DW_FORM_GNU_strp_alt
:
9355 info_ptr
+= cu
->header
.offset_size
;
9357 case DW_FORM_exprloc
:
9359 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9360 info_ptr
+= bytes_read
;
9362 case DW_FORM_block1
:
9363 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9365 case DW_FORM_block2
:
9366 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9368 case DW_FORM_block4
:
9369 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9373 case DW_FORM_ref_udata
:
9374 case DW_FORM_GNU_addr_index
:
9375 case DW_FORM_GNU_str_index
:
9376 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9378 case DW_FORM_indirect
:
9379 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9380 info_ptr
+= bytes_read
;
9381 /* We need to continue parsing from here, so just go back to
9383 goto skip_attribute
;
9386 error (_("Dwarf Error: Cannot handle %s "
9387 "in DWARF reader [in module %s]"),
9388 dwarf_form_name (form
),
9389 bfd_get_filename (abfd
));
9393 if (abbrev
->has_children
)
9394 return skip_children (reader
, info_ptr
);
9399 /* Locate ORIG_PDI's sibling.
9400 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9402 static const gdb_byte
*
9403 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9404 struct partial_die_info
*orig_pdi
,
9405 const gdb_byte
*info_ptr
)
9407 /* Do we know the sibling already? */
9409 if (orig_pdi
->sibling
)
9410 return orig_pdi
->sibling
;
9412 /* Are there any children to deal with? */
9414 if (!orig_pdi
->has_children
)
9417 /* Skip the children the long way. */
9419 return skip_children (reader
, info_ptr
);
9422 /* Expand this partial symbol table into a full symbol table. SELF is
9426 dwarf2_read_symtab (struct partial_symtab
*self
,
9427 struct objfile
*objfile
)
9429 struct dwarf2_per_objfile
*dwarf2_per_objfile
9430 = get_dwarf2_per_objfile (objfile
);
9434 warning (_("bug: psymtab for %s is already read in."),
9441 printf_filtered (_("Reading in symbols for %s..."),
9443 gdb_flush (gdb_stdout
);
9446 /* If this psymtab is constructed from a debug-only objfile, the
9447 has_section_at_zero flag will not necessarily be correct. We
9448 can get the correct value for this flag by looking at the data
9449 associated with the (presumably stripped) associated objfile. */
9450 if (objfile
->separate_debug_objfile_backlink
)
9452 struct dwarf2_per_objfile
*dpo_backlink
9453 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9455 dwarf2_per_objfile
->has_section_at_zero
9456 = dpo_backlink
->has_section_at_zero
;
9459 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9461 psymtab_to_symtab_1 (self
);
9463 /* Finish up the debug error message. */
9465 printf_filtered (_("done.\n"));
9468 process_cu_includes (dwarf2_per_objfile
);
9471 /* Reading in full CUs. */
9473 /* Add PER_CU to the queue. */
9476 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9477 enum language pretend_language
)
9479 struct dwarf2_queue_item
*item
;
9482 item
= XNEW (struct dwarf2_queue_item
);
9483 item
->per_cu
= per_cu
;
9484 item
->pretend_language
= pretend_language
;
9487 if (dwarf2_queue
== NULL
)
9488 dwarf2_queue
= item
;
9490 dwarf2_queue_tail
->next
= item
;
9492 dwarf2_queue_tail
= item
;
9495 /* If PER_CU is not yet queued, add it to the queue.
9496 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9498 The result is non-zero if PER_CU was queued, otherwise the result is zero
9499 meaning either PER_CU is already queued or it is already loaded.
9501 N.B. There is an invariant here that if a CU is queued then it is loaded.
9502 The caller is required to load PER_CU if we return non-zero. */
9505 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9506 struct dwarf2_per_cu_data
*per_cu
,
9507 enum language pretend_language
)
9509 /* We may arrive here during partial symbol reading, if we need full
9510 DIEs to process an unusual case (e.g. template arguments). Do
9511 not queue PER_CU, just tell our caller to load its DIEs. */
9512 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9514 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9519 /* Mark the dependence relation so that we don't flush PER_CU
9521 if (dependent_cu
!= NULL
)
9522 dwarf2_add_dependence (dependent_cu
, per_cu
);
9524 /* If it's already on the queue, we have nothing to do. */
9528 /* If the compilation unit is already loaded, just mark it as
9530 if (per_cu
->cu
!= NULL
)
9532 per_cu
->cu
->last_used
= 0;
9536 /* Add it to the queue. */
9537 queue_comp_unit (per_cu
, pretend_language
);
9542 /* Process the queue. */
9545 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9547 struct dwarf2_queue_item
*item
, *next_item
;
9549 if (dwarf_read_debug
)
9551 fprintf_unfiltered (gdb_stdlog
,
9552 "Expanding one or more symtabs of objfile %s ...\n",
9553 objfile_name (dwarf2_per_objfile
->objfile
));
9556 /* The queue starts out with one item, but following a DIE reference
9557 may load a new CU, adding it to the end of the queue. */
9558 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9560 if ((dwarf2_per_objfile
->using_index
9561 ? !item
->per_cu
->v
.quick
->compunit_symtab
9562 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9563 /* Skip dummy CUs. */
9564 && item
->per_cu
->cu
!= NULL
)
9566 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9567 unsigned int debug_print_threshold
;
9570 if (per_cu
->is_debug_types
)
9572 struct signatured_type
*sig_type
=
9573 (struct signatured_type
*) per_cu
;
9575 sprintf (buf
, "TU %s at offset %s",
9576 hex_string (sig_type
->signature
),
9577 sect_offset_str (per_cu
->sect_off
));
9578 /* There can be 100s of TUs.
9579 Only print them in verbose mode. */
9580 debug_print_threshold
= 2;
9584 sprintf (buf
, "CU at offset %s",
9585 sect_offset_str (per_cu
->sect_off
));
9586 debug_print_threshold
= 1;
9589 if (dwarf_read_debug
>= debug_print_threshold
)
9590 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9592 if (per_cu
->is_debug_types
)
9593 process_full_type_unit (per_cu
, item
->pretend_language
);
9595 process_full_comp_unit (per_cu
, item
->pretend_language
);
9597 if (dwarf_read_debug
>= debug_print_threshold
)
9598 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9601 item
->per_cu
->queued
= 0;
9602 next_item
= item
->next
;
9606 dwarf2_queue_tail
= NULL
;
9608 if (dwarf_read_debug
)
9610 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9611 objfile_name (dwarf2_per_objfile
->objfile
));
9615 /* Read in full symbols for PST, and anything it depends on. */
9618 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9620 struct dwarf2_per_cu_data
*per_cu
;
9626 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9627 if (!pst
->dependencies
[i
]->readin
9628 && pst
->dependencies
[i
]->user
== NULL
)
9630 /* Inform about additional files that need to be read in. */
9633 /* FIXME: i18n: Need to make this a single string. */
9634 fputs_filtered (" ", gdb_stdout
);
9636 fputs_filtered ("and ", gdb_stdout
);
9638 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9639 wrap_here (""); /* Flush output. */
9640 gdb_flush (gdb_stdout
);
9642 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9645 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9649 /* It's an include file, no symbols to read for it.
9650 Everything is in the parent symtab. */
9655 dw2_do_instantiate_symtab (per_cu
);
9658 /* Trivial hash function for die_info: the hash value of a DIE
9659 is its offset in .debug_info for this objfile. */
9662 die_hash (const void *item
)
9664 const struct die_info
*die
= (const struct die_info
*) item
;
9666 return to_underlying (die
->sect_off
);
9669 /* Trivial comparison function for die_info structures: two DIEs
9670 are equal if they have the same offset. */
9673 die_eq (const void *item_lhs
, const void *item_rhs
)
9675 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9676 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9678 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9681 /* die_reader_func for load_full_comp_unit.
9682 This is identical to read_signatured_type_reader,
9683 but is kept separate for now. */
9686 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9687 const gdb_byte
*info_ptr
,
9688 struct die_info
*comp_unit_die
,
9692 struct dwarf2_cu
*cu
= reader
->cu
;
9693 enum language
*language_ptr
= (enum language
*) data
;
9695 gdb_assert (cu
->die_hash
== NULL
);
9697 htab_create_alloc_ex (cu
->header
.length
/ 12,
9701 &cu
->comp_unit_obstack
,
9702 hashtab_obstack_allocate
,
9703 dummy_obstack_deallocate
);
9706 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9707 &info_ptr
, comp_unit_die
);
9708 cu
->dies
= comp_unit_die
;
9709 /* comp_unit_die is not stored in die_hash, no need. */
9711 /* We try not to read any attributes in this function, because not
9712 all CUs needed for references have been loaded yet, and symbol
9713 table processing isn't initialized. But we have to set the CU language,
9714 or we won't be able to build types correctly.
9715 Similarly, if we do not read the producer, we can not apply
9716 producer-specific interpretation. */
9717 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9720 /* Load the DIEs associated with PER_CU into memory. */
9723 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9724 enum language pretend_language
)
9726 gdb_assert (! this_cu
->is_debug_types
);
9728 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
9729 load_full_comp_unit_reader
, &pretend_language
);
9732 /* Add a DIE to the delayed physname list. */
9735 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9736 const char *name
, struct die_info
*die
,
9737 struct dwarf2_cu
*cu
)
9739 struct delayed_method_info mi
;
9741 mi
.fnfield_index
= fnfield_index
;
9745 cu
->method_list
.push_back (mi
);
9748 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9749 "const" / "volatile". If so, decrements LEN by the length of the
9750 modifier and return true. Otherwise return false. */
9754 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9756 size_t mod_len
= sizeof (mod
) - 1;
9757 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9765 /* Compute the physnames of any methods on the CU's method list.
9767 The computation of method physnames is delayed in order to avoid the
9768 (bad) condition that one of the method's formal parameters is of an as yet
9772 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9774 /* Only C++ delays computing physnames. */
9775 if (cu
->method_list
.empty ())
9777 gdb_assert (cu
->language
== language_cplus
);
9779 for (struct delayed_method_info
&mi
: cu
->method_list
)
9781 const char *physname
;
9782 struct fn_fieldlist
*fn_flp
9783 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9784 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9785 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9786 = physname
? physname
: "";
9788 /* Since there's no tag to indicate whether a method is a
9789 const/volatile overload, extract that information out of the
9791 if (physname
!= NULL
)
9793 size_t len
= strlen (physname
);
9797 if (physname
[len
] == ')') /* shortcut */
9799 else if (check_modifier (physname
, len
, " const"))
9800 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9801 else if (check_modifier (physname
, len
, " volatile"))
9802 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9809 /* The list is no longer needed. */
9810 cu
->method_list
.clear ();
9813 /* Go objects should be embedded in a DW_TAG_module DIE,
9814 and it's not clear if/how imported objects will appear.
9815 To keep Go support simple until that's worked out,
9816 go back through what we've read and create something usable.
9817 We could do this while processing each DIE, and feels kinda cleaner,
9818 but that way is more invasive.
9819 This is to, for example, allow the user to type "p var" or "b main"
9820 without having to specify the package name, and allow lookups
9821 of module.object to work in contexts that use the expression
9825 fixup_go_packaging (struct dwarf2_cu
*cu
)
9827 char *package_name
= NULL
;
9828 struct pending
*list
;
9831 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
9833 for (i
= 0; i
< list
->nsyms
; ++i
)
9835 struct symbol
*sym
= list
->symbol
[i
];
9837 if (SYMBOL_LANGUAGE (sym
) == language_go
9838 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9840 char *this_package_name
= go_symbol_package_name (sym
);
9842 if (this_package_name
== NULL
)
9844 if (package_name
== NULL
)
9845 package_name
= this_package_name
;
9848 struct objfile
*objfile
9849 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9850 if (strcmp (package_name
, this_package_name
) != 0)
9851 complaint (&symfile_complaints
,
9852 _("Symtab %s has objects from two different Go packages: %s and %s"),
9853 (symbol_symtab (sym
) != NULL
9854 ? symtab_to_filename_for_display
9855 (symbol_symtab (sym
))
9856 : objfile_name (objfile
)),
9857 this_package_name
, package_name
);
9858 xfree (this_package_name
);
9864 if (package_name
!= NULL
)
9866 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9867 const char *saved_package_name
9868 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9870 strlen (package_name
));
9871 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9872 saved_package_name
);
9875 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9877 sym
= allocate_symbol (objfile
);
9878 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9879 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9880 strlen (saved_package_name
), 0, objfile
);
9881 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9882 e.g., "main" finds the "main" module and not C's main(). */
9883 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9884 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9885 SYMBOL_TYPE (sym
) = type
;
9887 add_symbol_to_list (sym
, &global_symbols
);
9889 xfree (package_name
);
9893 /* Allocate a fully-qualified name consisting of the two parts on the
9897 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9899 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9902 /* A helper that allocates a struct discriminant_info to attach to a
9905 static struct discriminant_info
*
9906 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9909 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9910 gdb_assert (discriminant_index
== -1
9911 || (discriminant_index
>= 0
9912 && discriminant_index
< TYPE_NFIELDS (type
)));
9913 gdb_assert (default_index
== -1
9914 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9916 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9918 struct discriminant_info
*disc
9919 = ((struct discriminant_info
*)
9921 offsetof (struct discriminant_info
, discriminants
)
9922 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9923 disc
->default_index
= default_index
;
9924 disc
->discriminant_index
= discriminant_index
;
9926 struct dynamic_prop prop
;
9927 prop
.kind
= PROP_UNDEFINED
;
9928 prop
.data
.baton
= disc
;
9930 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9935 /* Some versions of rustc emitted enums in an unusual way.
9937 Ordinary enums were emitted as unions. The first element of each
9938 structure in the union was named "RUST$ENUM$DISR". This element
9939 held the discriminant.
9941 These versions of Rust also implemented the "non-zero"
9942 optimization. When the enum had two values, and one is empty and
9943 the other holds a pointer that cannot be zero, the pointer is used
9944 as the discriminant, with a zero value meaning the empty variant.
9945 Here, the union's first member is of the form
9946 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9947 where the fieldnos are the indices of the fields that should be
9948 traversed in order to find the field (which may be several fields deep)
9949 and the variantname is the name of the variant of the case when the
9952 This function recognizes whether TYPE is of one of these forms,
9953 and, if so, smashes it to be a variant type. */
9956 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9958 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9960 /* We don't need to deal with empty enums. */
9961 if (TYPE_NFIELDS (type
) == 0)
9964 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9965 if (TYPE_NFIELDS (type
) == 1
9966 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9968 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9970 /* Decode the field name to find the offset of the
9972 ULONGEST bit_offset
= 0;
9973 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9974 while (name
[0] >= '0' && name
[0] <= '9')
9977 unsigned long index
= strtoul (name
, &tail
, 10);
9980 || index
>= TYPE_NFIELDS (field_type
)
9981 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9982 != FIELD_LOC_KIND_BITPOS
))
9984 complaint (&symfile_complaints
,
9985 _("Could not parse Rust enum encoding string \"%s\""
9987 TYPE_FIELD_NAME (type
, 0),
9988 objfile_name (objfile
));
9993 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9994 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9997 /* Make a union to hold the variants. */
9998 struct type
*union_type
= alloc_type (objfile
);
9999 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10000 TYPE_NFIELDS (union_type
) = 3;
10001 TYPE_FIELDS (union_type
)
10002 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
10003 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10005 /* Put the discriminant must at index 0. */
10006 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
10007 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10008 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10009 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
10011 /* The order of fields doesn't really matter, so put the real
10012 field at index 1 and the data-less field at index 2. */
10013 struct discriminant_info
*disc
10014 = alloc_discriminant_info (union_type
, 0, 1);
10015 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
10016 TYPE_FIELD_NAME (union_type
, 1)
10017 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
10018 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
10019 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10020 TYPE_FIELD_NAME (union_type
, 1));
10022 const char *dataless_name
10023 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10025 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
10027 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
10028 /* NAME points into the original discriminant name, which
10029 already has the correct lifetime. */
10030 TYPE_FIELD_NAME (union_type
, 2) = name
;
10031 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
10032 disc
->discriminants
[2] = 0;
10034 /* Smash this type to be a structure type. We have to do this
10035 because the type has already been recorded. */
10036 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10037 TYPE_NFIELDS (type
) = 1;
10039 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
10041 /* Install the variant part. */
10042 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10043 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10044 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10046 else if (TYPE_NFIELDS (type
) == 1)
10048 /* We assume that a union with a single field is a univariant
10050 /* Smash this type to be a structure type. We have to do this
10051 because the type has already been recorded. */
10052 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10054 /* Make a union to hold the variants. */
10055 struct type
*union_type
= alloc_type (objfile
);
10056 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10057 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10058 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10059 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10061 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10062 const char *variant_name
10063 = rust_last_path_segment (TYPE_NAME (field_type
));
10064 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10065 TYPE_NAME (field_type
)
10066 = rust_fully_qualify (&objfile
->objfile_obstack
,
10067 TYPE_NAME (type
), variant_name
);
10069 /* Install the union in the outer struct type. */
10070 TYPE_NFIELDS (type
) = 1;
10072 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10073 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10074 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10075 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10077 alloc_discriminant_info (union_type
, -1, 0);
10081 struct type
*disr_type
= nullptr;
10082 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10084 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10086 if (TYPE_NFIELDS (disr_type
) == 0)
10088 /* Could be data-less variant, so keep going. */
10090 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10091 "RUST$ENUM$DISR") != 0)
10093 /* Not a Rust enum. */
10103 /* If we got here without a discriminant, then it's probably
10105 if (disr_type
== nullptr)
10108 /* Smash this type to be a structure type. We have to do this
10109 because the type has already been recorded. */
10110 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10112 /* Make a union to hold the variants. */
10113 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10114 struct type
*union_type
= alloc_type (objfile
);
10115 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10116 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10117 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10118 TYPE_FIELDS (union_type
)
10119 = (struct field
*) TYPE_ZALLOC (union_type
,
10120 (TYPE_NFIELDS (union_type
)
10121 * sizeof (struct field
)));
10123 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10124 TYPE_NFIELDS (type
) * sizeof (struct field
));
10126 /* Install the discriminant at index 0 in the union. */
10127 TYPE_FIELD (union_type
, 0) = *disr_field
;
10128 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10129 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10131 /* Install the union in the outer struct type. */
10132 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10133 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10134 TYPE_NFIELDS (type
) = 1;
10136 /* Set the size and offset of the union type. */
10137 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10139 /* We need a way to find the correct discriminant given a
10140 variant name. For convenience we build a map here. */
10141 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10142 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10143 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10145 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10148 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10149 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10153 int n_fields
= TYPE_NFIELDS (union_type
);
10154 struct discriminant_info
*disc
10155 = alloc_discriminant_info (union_type
, 0, -1);
10156 /* Skip the discriminant here. */
10157 for (int i
= 1; i
< n_fields
; ++i
)
10159 /* Find the final word in the name of this variant's type.
10160 That name can be used to look up the correct
10162 const char *variant_name
10163 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10166 auto iter
= discriminant_map
.find (variant_name
);
10167 if (iter
!= discriminant_map
.end ())
10168 disc
->discriminants
[i
] = iter
->second
;
10170 /* Remove the discriminant field. */
10171 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10172 --TYPE_NFIELDS (sub_type
);
10173 ++TYPE_FIELDS (sub_type
);
10174 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10175 TYPE_NAME (sub_type
)
10176 = rust_fully_qualify (&objfile
->objfile_obstack
,
10177 TYPE_NAME (type
), variant_name
);
10182 /* Rewrite some Rust unions to be structures with variants parts. */
10185 rust_union_quirks (struct dwarf2_cu
*cu
)
10187 gdb_assert (cu
->language
== language_rust
);
10188 for (struct type
*type
: cu
->rust_unions
)
10189 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10192 /* Return the symtab for PER_CU. This works properly regardless of
10193 whether we're using the index or psymtabs. */
10195 static struct compunit_symtab
*
10196 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10198 return (per_cu
->dwarf2_per_objfile
->using_index
10199 ? per_cu
->v
.quick
->compunit_symtab
10200 : per_cu
->v
.psymtab
->compunit_symtab
);
10203 /* A helper function for computing the list of all symbol tables
10204 included by PER_CU. */
10207 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10208 htab_t all_children
, htab_t all_type_symtabs
,
10209 struct dwarf2_per_cu_data
*per_cu
,
10210 struct compunit_symtab
*immediate_parent
)
10214 struct compunit_symtab
*cust
;
10215 struct dwarf2_per_cu_data
*iter
;
10217 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10220 /* This inclusion and its children have been processed. */
10225 /* Only add a CU if it has a symbol table. */
10226 cust
= get_compunit_symtab (per_cu
);
10229 /* If this is a type unit only add its symbol table if we haven't
10230 seen it yet (type unit per_cu's can share symtabs). */
10231 if (per_cu
->is_debug_types
)
10233 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10237 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10238 if (cust
->user
== NULL
)
10239 cust
->user
= immediate_parent
;
10244 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10245 if (cust
->user
== NULL
)
10246 cust
->user
= immediate_parent
;
10251 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10254 recursively_compute_inclusions (result
, all_children
,
10255 all_type_symtabs
, iter
, cust
);
10259 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10263 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10265 gdb_assert (! per_cu
->is_debug_types
);
10267 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10270 struct dwarf2_per_cu_data
*per_cu_iter
;
10271 struct compunit_symtab
*compunit_symtab_iter
;
10272 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10273 htab_t all_children
, all_type_symtabs
;
10274 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10276 /* If we don't have a symtab, we can just skip this case. */
10280 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10281 NULL
, xcalloc
, xfree
);
10282 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10283 NULL
, xcalloc
, xfree
);
10286 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10290 recursively_compute_inclusions (&result_symtabs
, all_children
,
10291 all_type_symtabs
, per_cu_iter
,
10295 /* Now we have a transitive closure of all the included symtabs. */
10296 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10298 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10299 struct compunit_symtab
*, len
+ 1);
10301 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10302 compunit_symtab_iter
);
10304 cust
->includes
[ix
] = compunit_symtab_iter
;
10305 cust
->includes
[len
] = NULL
;
10307 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10308 htab_delete (all_children
);
10309 htab_delete (all_type_symtabs
);
10313 /* Compute the 'includes' field for the symtabs of all the CUs we just
10317 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10320 struct dwarf2_per_cu_data
*iter
;
10323 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10327 if (! iter
->is_debug_types
)
10328 compute_compunit_symtab_includes (iter
);
10331 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10334 /* Generate full symbol information for PER_CU, whose DIEs have
10335 already been loaded into memory. */
10338 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10339 enum language pretend_language
)
10341 struct dwarf2_cu
*cu
= per_cu
->cu
;
10342 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10343 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10344 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10345 CORE_ADDR lowpc
, highpc
;
10346 struct compunit_symtab
*cust
;
10347 CORE_ADDR baseaddr
;
10348 struct block
*static_block
;
10351 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10354 scoped_free_pendings free_pending
;
10356 /* Clear the list here in case something was left over. */
10357 cu
->method_list
.clear ();
10359 cu
->list_in_scope
= &file_symbols
;
10361 cu
->language
= pretend_language
;
10362 cu
->language_defn
= language_def (cu
->language
);
10364 /* Do line number decoding in read_file_scope () */
10365 process_die (cu
->dies
, cu
);
10367 /* For now fudge the Go package. */
10368 if (cu
->language
== language_go
)
10369 fixup_go_packaging (cu
);
10371 /* Now that we have processed all the DIEs in the CU, all the types
10372 should be complete, and it should now be safe to compute all of the
10374 compute_delayed_physnames (cu
);
10376 if (cu
->language
== language_rust
)
10377 rust_union_quirks (cu
);
10379 /* Some compilers don't define a DW_AT_high_pc attribute for the
10380 compilation unit. If the DW_AT_high_pc is missing, synthesize
10381 it, by scanning the DIE's below the compilation unit. */
10382 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10384 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10385 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10387 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10388 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10389 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10390 addrmap to help ensure it has an accurate map of pc values belonging to
10392 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10394 cust
= end_symtab_from_static_block (static_block
,
10395 SECT_OFF_TEXT (objfile
), 0);
10399 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10401 /* Set symtab language to language from DW_AT_language. If the
10402 compilation is from a C file generated by language preprocessors, do
10403 not set the language if it was already deduced by start_subfile. */
10404 if (!(cu
->language
== language_c
10405 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10406 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10408 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10409 produce DW_AT_location with location lists but it can be possibly
10410 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10411 there were bugs in prologue debug info, fixed later in GCC-4.5
10412 by "unwind info for epilogues" patch (which is not directly related).
10414 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10415 needed, it would be wrong due to missing DW_AT_producer there.
10417 Still one can confuse GDB by using non-standard GCC compilation
10418 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10420 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10421 cust
->locations_valid
= 1;
10423 if (gcc_4_minor
>= 5)
10424 cust
->epilogue_unwind_valid
= 1;
10426 cust
->call_site_htab
= cu
->call_site_htab
;
10429 if (dwarf2_per_objfile
->using_index
)
10430 per_cu
->v
.quick
->compunit_symtab
= cust
;
10433 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10434 pst
->compunit_symtab
= cust
;
10438 /* Push it for inclusion processing later. */
10439 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10442 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10443 already been loaded into memory. */
10446 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10447 enum language pretend_language
)
10449 struct dwarf2_cu
*cu
= per_cu
->cu
;
10450 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10451 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10452 struct compunit_symtab
*cust
;
10453 struct signatured_type
*sig_type
;
10455 gdb_assert (per_cu
->is_debug_types
);
10456 sig_type
= (struct signatured_type
*) per_cu
;
10459 scoped_free_pendings free_pending
;
10461 /* Clear the list here in case something was left over. */
10462 cu
->method_list
.clear ();
10464 cu
->list_in_scope
= &file_symbols
;
10466 cu
->language
= pretend_language
;
10467 cu
->language_defn
= language_def (cu
->language
);
10469 /* The symbol tables are set up in read_type_unit_scope. */
10470 process_die (cu
->dies
, cu
);
10472 /* For now fudge the Go package. */
10473 if (cu
->language
== language_go
)
10474 fixup_go_packaging (cu
);
10476 /* Now that we have processed all the DIEs in the CU, all the types
10477 should be complete, and it should now be safe to compute all of the
10479 compute_delayed_physnames (cu
);
10481 if (cu
->language
== language_rust
)
10482 rust_union_quirks (cu
);
10484 /* TUs share symbol tables.
10485 If this is the first TU to use this symtab, complete the construction
10486 of it with end_expandable_symtab. Otherwise, complete the addition of
10487 this TU's symbols to the existing symtab. */
10488 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10490 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10491 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10495 /* Set symtab language to language from DW_AT_language. If the
10496 compilation is from a C file generated by language preprocessors,
10497 do not set the language if it was already deduced by
10499 if (!(cu
->language
== language_c
10500 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10501 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10506 augment_type_symtab ();
10507 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10510 if (dwarf2_per_objfile
->using_index
)
10511 per_cu
->v
.quick
->compunit_symtab
= cust
;
10514 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10515 pst
->compunit_symtab
= cust
;
10520 /* Process an imported unit DIE. */
10523 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10525 struct attribute
*attr
;
10527 /* For now we don't handle imported units in type units. */
10528 if (cu
->per_cu
->is_debug_types
)
10530 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10531 " supported in type units [in module %s]"),
10532 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10535 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10538 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10539 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10540 dwarf2_per_cu_data
*per_cu
10541 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10542 cu
->per_cu
->dwarf2_per_objfile
);
10544 /* If necessary, add it to the queue and load its DIEs. */
10545 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10546 load_full_comp_unit (per_cu
, cu
->language
);
10548 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10553 /* RAII object that represents a process_die scope: i.e.,
10554 starts/finishes processing a DIE. */
10555 class process_die_scope
10558 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10559 : m_die (die
), m_cu (cu
)
10561 /* We should only be processing DIEs not already in process. */
10562 gdb_assert (!m_die
->in_process
);
10563 m_die
->in_process
= true;
10566 ~process_die_scope ()
10568 m_die
->in_process
= false;
10570 /* If we're done processing the DIE for the CU that owns the line
10571 header, we don't need the line header anymore. */
10572 if (m_cu
->line_header_die_owner
== m_die
)
10574 delete m_cu
->line_header
;
10575 m_cu
->line_header
= NULL
;
10576 m_cu
->line_header_die_owner
= NULL
;
10585 /* Process a die and its children. */
10588 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10590 process_die_scope
scope (die
, cu
);
10594 case DW_TAG_padding
:
10596 case DW_TAG_compile_unit
:
10597 case DW_TAG_partial_unit
:
10598 read_file_scope (die
, cu
);
10600 case DW_TAG_type_unit
:
10601 read_type_unit_scope (die
, cu
);
10603 case DW_TAG_subprogram
:
10604 case DW_TAG_inlined_subroutine
:
10605 read_func_scope (die
, cu
);
10607 case DW_TAG_lexical_block
:
10608 case DW_TAG_try_block
:
10609 case DW_TAG_catch_block
:
10610 read_lexical_block_scope (die
, cu
);
10612 case DW_TAG_call_site
:
10613 case DW_TAG_GNU_call_site
:
10614 read_call_site_scope (die
, cu
);
10616 case DW_TAG_class_type
:
10617 case DW_TAG_interface_type
:
10618 case DW_TAG_structure_type
:
10619 case DW_TAG_union_type
:
10620 process_structure_scope (die
, cu
);
10622 case DW_TAG_enumeration_type
:
10623 process_enumeration_scope (die
, cu
);
10626 /* These dies have a type, but processing them does not create
10627 a symbol or recurse to process the children. Therefore we can
10628 read them on-demand through read_type_die. */
10629 case DW_TAG_subroutine_type
:
10630 case DW_TAG_set_type
:
10631 case DW_TAG_array_type
:
10632 case DW_TAG_pointer_type
:
10633 case DW_TAG_ptr_to_member_type
:
10634 case DW_TAG_reference_type
:
10635 case DW_TAG_rvalue_reference_type
:
10636 case DW_TAG_string_type
:
10639 case DW_TAG_base_type
:
10640 case DW_TAG_subrange_type
:
10641 case DW_TAG_typedef
:
10642 /* Add a typedef symbol for the type definition, if it has a
10644 new_symbol (die
, read_type_die (die
, cu
), cu
);
10646 case DW_TAG_common_block
:
10647 read_common_block (die
, cu
);
10649 case DW_TAG_common_inclusion
:
10651 case DW_TAG_namespace
:
10652 cu
->processing_has_namespace_info
= 1;
10653 read_namespace (die
, cu
);
10655 case DW_TAG_module
:
10656 cu
->processing_has_namespace_info
= 1;
10657 read_module (die
, cu
);
10659 case DW_TAG_imported_declaration
:
10660 cu
->processing_has_namespace_info
= 1;
10661 if (read_namespace_alias (die
, cu
))
10663 /* The declaration is not a global namespace alias: fall through. */
10664 case DW_TAG_imported_module
:
10665 cu
->processing_has_namespace_info
= 1;
10666 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10667 || cu
->language
!= language_fortran
))
10668 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10669 dwarf_tag_name (die
->tag
));
10670 read_import_statement (die
, cu
);
10673 case DW_TAG_imported_unit
:
10674 process_imported_unit_die (die
, cu
);
10677 case DW_TAG_variable
:
10678 read_variable (die
, cu
);
10682 new_symbol (die
, NULL
, cu
);
10687 /* DWARF name computation. */
10689 /* A helper function for dwarf2_compute_name which determines whether DIE
10690 needs to have the name of the scope prepended to the name listed in the
10694 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10696 struct attribute
*attr
;
10700 case DW_TAG_namespace
:
10701 case DW_TAG_typedef
:
10702 case DW_TAG_class_type
:
10703 case DW_TAG_interface_type
:
10704 case DW_TAG_structure_type
:
10705 case DW_TAG_union_type
:
10706 case DW_TAG_enumeration_type
:
10707 case DW_TAG_enumerator
:
10708 case DW_TAG_subprogram
:
10709 case DW_TAG_inlined_subroutine
:
10710 case DW_TAG_member
:
10711 case DW_TAG_imported_declaration
:
10714 case DW_TAG_variable
:
10715 case DW_TAG_constant
:
10716 /* We only need to prefix "globally" visible variables. These include
10717 any variable marked with DW_AT_external or any variable that
10718 lives in a namespace. [Variables in anonymous namespaces
10719 require prefixing, but they are not DW_AT_external.] */
10721 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10723 struct dwarf2_cu
*spec_cu
= cu
;
10725 return die_needs_namespace (die_specification (die
, &spec_cu
),
10729 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10730 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10731 && die
->parent
->tag
!= DW_TAG_module
)
10733 /* A variable in a lexical block of some kind does not need a
10734 namespace, even though in C++ such variables may be external
10735 and have a mangled name. */
10736 if (die
->parent
->tag
== DW_TAG_lexical_block
10737 || die
->parent
->tag
== DW_TAG_try_block
10738 || die
->parent
->tag
== DW_TAG_catch_block
10739 || die
->parent
->tag
== DW_TAG_subprogram
)
10748 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10749 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10750 defined for the given DIE. */
10752 static struct attribute
*
10753 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10755 struct attribute
*attr
;
10757 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10759 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10764 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10765 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10766 defined for the given DIE. */
10768 static const char *
10769 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10771 const char *linkage_name
;
10773 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10774 if (linkage_name
== NULL
)
10775 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10777 return linkage_name
;
10780 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10781 compute the physname for the object, which include a method's:
10782 - formal parameters (C++),
10783 - receiver type (Go),
10785 The term "physname" is a bit confusing.
10786 For C++, for example, it is the demangled name.
10787 For Go, for example, it's the mangled name.
10789 For Ada, return the DIE's linkage name rather than the fully qualified
10790 name. PHYSNAME is ignored..
10792 The result is allocated on the objfile_obstack and canonicalized. */
10794 static const char *
10795 dwarf2_compute_name (const char *name
,
10796 struct die_info
*die
, struct dwarf2_cu
*cu
,
10799 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10802 name
= dwarf2_name (die
, cu
);
10804 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10805 but otherwise compute it by typename_concat inside GDB.
10806 FIXME: Actually this is not really true, or at least not always true.
10807 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10808 Fortran names because there is no mangling standard. So new_symbol
10809 will set the demangled name to the result of dwarf2_full_name, and it is
10810 the demangled name that GDB uses if it exists. */
10811 if (cu
->language
== language_ada
10812 || (cu
->language
== language_fortran
&& physname
))
10814 /* For Ada unit, we prefer the linkage name over the name, as
10815 the former contains the exported name, which the user expects
10816 to be able to reference. Ideally, we want the user to be able
10817 to reference this entity using either natural or linkage name,
10818 but we haven't started looking at this enhancement yet. */
10819 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10821 if (linkage_name
!= NULL
)
10822 return linkage_name
;
10825 /* These are the only languages we know how to qualify names in. */
10827 && (cu
->language
== language_cplus
10828 || cu
->language
== language_fortran
|| cu
->language
== language_d
10829 || cu
->language
== language_rust
))
10831 if (die_needs_namespace (die
, cu
))
10833 const char *prefix
;
10834 const char *canonical_name
= NULL
;
10838 prefix
= determine_prefix (die
, cu
);
10839 if (*prefix
!= '\0')
10841 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10844 buf
.puts (prefixed_name
);
10845 xfree (prefixed_name
);
10850 /* Template parameters may be specified in the DIE's DW_AT_name, or
10851 as children with DW_TAG_template_type_param or
10852 DW_TAG_value_type_param. If the latter, add them to the name
10853 here. If the name already has template parameters, then
10854 skip this step; some versions of GCC emit both, and
10855 it is more efficient to use the pre-computed name.
10857 Something to keep in mind about this process: it is very
10858 unlikely, or in some cases downright impossible, to produce
10859 something that will match the mangled name of a function.
10860 If the definition of the function has the same debug info,
10861 we should be able to match up with it anyway. But fallbacks
10862 using the minimal symbol, for instance to find a method
10863 implemented in a stripped copy of libstdc++, will not work.
10864 If we do not have debug info for the definition, we will have to
10865 match them up some other way.
10867 When we do name matching there is a related problem with function
10868 templates; two instantiated function templates are allowed to
10869 differ only by their return types, which we do not add here. */
10871 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10873 struct attribute
*attr
;
10874 struct die_info
*child
;
10877 die
->building_fullname
= 1;
10879 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10883 const gdb_byte
*bytes
;
10884 struct dwarf2_locexpr_baton
*baton
;
10887 if (child
->tag
!= DW_TAG_template_type_param
10888 && child
->tag
!= DW_TAG_template_value_param
)
10899 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10902 complaint (&symfile_complaints
,
10903 _("template parameter missing DW_AT_type"));
10904 buf
.puts ("UNKNOWN_TYPE");
10907 type
= die_type (child
, cu
);
10909 if (child
->tag
== DW_TAG_template_type_param
)
10911 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10915 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10918 complaint (&symfile_complaints
,
10919 _("template parameter missing "
10920 "DW_AT_const_value"));
10921 buf
.puts ("UNKNOWN_VALUE");
10925 dwarf2_const_value_attr (attr
, type
, name
,
10926 &cu
->comp_unit_obstack
, cu
,
10927 &value
, &bytes
, &baton
);
10929 if (TYPE_NOSIGN (type
))
10930 /* GDB prints characters as NUMBER 'CHAR'. If that's
10931 changed, this can use value_print instead. */
10932 c_printchar (value
, type
, &buf
);
10935 struct value_print_options opts
;
10938 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10942 else if (bytes
!= NULL
)
10944 v
= allocate_value (type
);
10945 memcpy (value_contents_writeable (v
), bytes
,
10946 TYPE_LENGTH (type
));
10949 v
= value_from_longest (type
, value
);
10951 /* Specify decimal so that we do not depend on
10953 get_formatted_print_options (&opts
, 'd');
10955 value_print (v
, &buf
, &opts
);
10960 die
->building_fullname
= 0;
10964 /* Close the argument list, with a space if necessary
10965 (nested templates). */
10966 if (!buf
.empty () && buf
.string ().back () == '>')
10973 /* For C++ methods, append formal parameter type
10974 information, if PHYSNAME. */
10976 if (physname
&& die
->tag
== DW_TAG_subprogram
10977 && cu
->language
== language_cplus
)
10979 struct type
*type
= read_type_die (die
, cu
);
10981 c_type_print_args (type
, &buf
, 1, cu
->language
,
10982 &type_print_raw_options
);
10984 if (cu
->language
== language_cplus
)
10986 /* Assume that an artificial first parameter is
10987 "this", but do not crash if it is not. RealView
10988 marks unnamed (and thus unused) parameters as
10989 artificial; there is no way to differentiate
10991 if (TYPE_NFIELDS (type
) > 0
10992 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10993 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10994 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10996 buf
.puts (" const");
11000 const std::string
&intermediate_name
= buf
.string ();
11002 if (cu
->language
== language_cplus
)
11004 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
11005 &objfile
->per_bfd
->storage_obstack
);
11007 /* If we only computed INTERMEDIATE_NAME, or if
11008 INTERMEDIATE_NAME is already canonical, then we need to
11009 copy it to the appropriate obstack. */
11010 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11011 name
= ((const char *)
11012 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11013 intermediate_name
.c_str (),
11014 intermediate_name
.length ()));
11016 name
= canonical_name
;
11023 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11024 If scope qualifiers are appropriate they will be added. The result
11025 will be allocated on the storage_obstack, or NULL if the DIE does
11026 not have a name. NAME may either be from a previous call to
11027 dwarf2_name or NULL.
11029 The output string will be canonicalized (if C++). */
11031 static const char *
11032 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11034 return dwarf2_compute_name (name
, die
, cu
, 0);
11037 /* Construct a physname for the given DIE in CU. NAME may either be
11038 from a previous call to dwarf2_name or NULL. The result will be
11039 allocated on the objfile_objstack or NULL if the DIE does not have a
11042 The output string will be canonicalized (if C++). */
11044 static const char *
11045 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11047 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11048 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11051 /* In this case dwarf2_compute_name is just a shortcut not building anything
11053 if (!die_needs_namespace (die
, cu
))
11054 return dwarf2_compute_name (name
, die
, cu
, 1);
11056 mangled
= dw2_linkage_name (die
, cu
);
11058 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11059 See https://github.com/rust-lang/rust/issues/32925. */
11060 if (cu
->language
== language_rust
&& mangled
!= NULL
11061 && strchr (mangled
, '{') != NULL
)
11064 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11066 gdb::unique_xmalloc_ptr
<char> demangled
;
11067 if (mangled
!= NULL
)
11070 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11072 /* Do nothing (do not demangle the symbol name). */
11074 else if (cu
->language
== language_go
)
11076 /* This is a lie, but we already lie to the caller new_symbol.
11077 new_symbol assumes we return the mangled name.
11078 This just undoes that lie until things are cleaned up. */
11082 /* Use DMGL_RET_DROP for C++ template functions to suppress
11083 their return type. It is easier for GDB users to search
11084 for such functions as `name(params)' than `long name(params)'.
11085 In such case the minimal symbol names do not match the full
11086 symbol names but for template functions there is never a need
11087 to look up their definition from their declaration so
11088 the only disadvantage remains the minimal symbol variant
11089 `long name(params)' does not have the proper inferior type. */
11090 demangled
.reset (gdb_demangle (mangled
,
11091 (DMGL_PARAMS
| DMGL_ANSI
11092 | DMGL_RET_DROP
)));
11095 canon
= demangled
.get ();
11103 if (canon
== NULL
|| check_physname
)
11105 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11107 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11109 /* It may not mean a bug in GDB. The compiler could also
11110 compute DW_AT_linkage_name incorrectly. But in such case
11111 GDB would need to be bug-to-bug compatible. */
11113 complaint (&symfile_complaints
,
11114 _("Computed physname <%s> does not match demangled <%s> "
11115 "(from linkage <%s>) - DIE at %s [in module %s]"),
11116 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11117 objfile_name (objfile
));
11119 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11120 is available here - over computed PHYSNAME. It is safer
11121 against both buggy GDB and buggy compilers. */
11135 retval
= ((const char *)
11136 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11137 retval
, strlen (retval
)));
11142 /* Inspect DIE in CU for a namespace alias. If one exists, record
11143 a new symbol for it.
11145 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11148 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11150 struct attribute
*attr
;
11152 /* If the die does not have a name, this is not a namespace
11154 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11158 struct die_info
*d
= die
;
11159 struct dwarf2_cu
*imported_cu
= cu
;
11161 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11162 keep inspecting DIEs until we hit the underlying import. */
11163 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11164 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11166 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11170 d
= follow_die_ref (d
, attr
, &imported_cu
);
11171 if (d
->tag
!= DW_TAG_imported_declaration
)
11175 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11177 complaint (&symfile_complaints
,
11178 _("DIE at %s has too many recursively imported "
11179 "declarations"), sect_offset_str (d
->sect_off
));
11186 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11188 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11189 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11191 /* This declaration is a global namespace alias. Add
11192 a symbol for it whose type is the aliased namespace. */
11193 new_symbol (die
, type
, cu
);
11202 /* Return the using directives repository (global or local?) to use in the
11203 current context for LANGUAGE.
11205 For Ada, imported declarations can materialize renamings, which *may* be
11206 global. However it is impossible (for now?) in DWARF to distinguish
11207 "external" imported declarations and "static" ones. As all imported
11208 declarations seem to be static in all other languages, make them all CU-wide
11209 global only in Ada. */
11211 static struct using_direct
**
11212 using_directives (enum language language
)
11214 if (language
== language_ada
&& context_stack_depth
== 0)
11215 return &global_using_directives
;
11217 return &local_using_directives
;
11220 /* Read the import statement specified by the given die and record it. */
11223 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11225 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11226 struct attribute
*import_attr
;
11227 struct die_info
*imported_die
, *child_die
;
11228 struct dwarf2_cu
*imported_cu
;
11229 const char *imported_name
;
11230 const char *imported_name_prefix
;
11231 const char *canonical_name
;
11232 const char *import_alias
;
11233 const char *imported_declaration
= NULL
;
11234 const char *import_prefix
;
11235 std::vector
<const char *> excludes
;
11237 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11238 if (import_attr
== NULL
)
11240 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11241 dwarf_tag_name (die
->tag
));
11246 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11247 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11248 if (imported_name
== NULL
)
11250 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11252 The import in the following code:
11266 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11267 <52> DW_AT_decl_file : 1
11268 <53> DW_AT_decl_line : 6
11269 <54> DW_AT_import : <0x75>
11270 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11271 <59> DW_AT_name : B
11272 <5b> DW_AT_decl_file : 1
11273 <5c> DW_AT_decl_line : 2
11274 <5d> DW_AT_type : <0x6e>
11276 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11277 <76> DW_AT_byte_size : 4
11278 <77> DW_AT_encoding : 5 (signed)
11280 imports the wrong die ( 0x75 instead of 0x58 ).
11281 This case will be ignored until the gcc bug is fixed. */
11285 /* Figure out the local name after import. */
11286 import_alias
= dwarf2_name (die
, cu
);
11288 /* Figure out where the statement is being imported to. */
11289 import_prefix
= determine_prefix (die
, cu
);
11291 /* Figure out what the scope of the imported die is and prepend it
11292 to the name of the imported die. */
11293 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11295 if (imported_die
->tag
!= DW_TAG_namespace
11296 && imported_die
->tag
!= DW_TAG_module
)
11298 imported_declaration
= imported_name
;
11299 canonical_name
= imported_name_prefix
;
11301 else if (strlen (imported_name_prefix
) > 0)
11302 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11303 imported_name_prefix
,
11304 (cu
->language
== language_d
? "." : "::"),
11305 imported_name
, (char *) NULL
);
11307 canonical_name
= imported_name
;
11309 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11310 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11311 child_die
= sibling_die (child_die
))
11313 /* DWARF-4: A Fortran use statement with a “rename list” may be
11314 represented by an imported module entry with an import attribute
11315 referring to the module and owned entries corresponding to those
11316 entities that are renamed as part of being imported. */
11318 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11320 complaint (&symfile_complaints
,
11321 _("child DW_TAG_imported_declaration expected "
11322 "- DIE at %s [in module %s]"),
11323 sect_offset_str (child_die
->sect_off
),
11324 objfile_name (objfile
));
11328 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11329 if (import_attr
== NULL
)
11331 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11332 dwarf_tag_name (child_die
->tag
));
11337 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11339 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11340 if (imported_name
== NULL
)
11342 complaint (&symfile_complaints
,
11343 _("child DW_TAG_imported_declaration has unknown "
11344 "imported name - DIE at %s [in module %s]"),
11345 sect_offset_str (child_die
->sect_off
),
11346 objfile_name (objfile
));
11350 excludes
.push_back (imported_name
);
11352 process_die (child_die
, cu
);
11355 add_using_directive (using_directives (cu
->language
),
11359 imported_declaration
,
11362 &objfile
->objfile_obstack
);
11365 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11366 types, but gives them a size of zero. Starting with version 14,
11367 ICC is compatible with GCC. */
11370 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11372 if (!cu
->checked_producer
)
11373 check_producer (cu
);
11375 return cu
->producer_is_icc_lt_14
;
11378 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11379 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11380 this, it was first present in GCC release 4.3.0. */
11383 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11385 if (!cu
->checked_producer
)
11386 check_producer (cu
);
11388 return cu
->producer_is_gcc_lt_4_3
;
11391 static file_and_directory
11392 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11394 file_and_directory res
;
11396 /* Find the filename. Do not use dwarf2_name here, since the filename
11397 is not a source language identifier. */
11398 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11399 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11401 if (res
.comp_dir
== NULL
11402 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11403 && IS_ABSOLUTE_PATH (res
.name
))
11405 res
.comp_dir_storage
= ldirname (res
.name
);
11406 if (!res
.comp_dir_storage
.empty ())
11407 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11409 if (res
.comp_dir
!= NULL
)
11411 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11412 directory, get rid of it. */
11413 const char *cp
= strchr (res
.comp_dir
, ':');
11415 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11416 res
.comp_dir
= cp
+ 1;
11419 if (res
.name
== NULL
)
11420 res
.name
= "<unknown>";
11425 /* Handle DW_AT_stmt_list for a compilation unit.
11426 DIE is the DW_TAG_compile_unit die for CU.
11427 COMP_DIR is the compilation directory. LOWPC is passed to
11428 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11431 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11432 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11434 struct dwarf2_per_objfile
*dwarf2_per_objfile
11435 = cu
->per_cu
->dwarf2_per_objfile
;
11436 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11437 struct attribute
*attr
;
11438 struct line_header line_header_local
;
11439 hashval_t line_header_local_hash
;
11441 int decode_mapping
;
11443 gdb_assert (! cu
->per_cu
->is_debug_types
);
11445 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11449 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11451 /* The line header hash table is only created if needed (it exists to
11452 prevent redundant reading of the line table for partial_units).
11453 If we're given a partial_unit, we'll need it. If we're given a
11454 compile_unit, then use the line header hash table if it's already
11455 created, but don't create one just yet. */
11457 if (dwarf2_per_objfile
->line_header_hash
== NULL
11458 && die
->tag
== DW_TAG_partial_unit
)
11460 dwarf2_per_objfile
->line_header_hash
11461 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11462 line_header_eq_voidp
,
11463 free_line_header_voidp
,
11464 &objfile
->objfile_obstack
,
11465 hashtab_obstack_allocate
,
11466 dummy_obstack_deallocate
);
11469 line_header_local
.sect_off
= line_offset
;
11470 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11471 line_header_local_hash
= line_header_hash (&line_header_local
);
11472 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11474 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11475 &line_header_local
,
11476 line_header_local_hash
, NO_INSERT
);
11478 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11479 is not present in *SLOT (since if there is something in *SLOT then
11480 it will be for a partial_unit). */
11481 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11483 gdb_assert (*slot
!= NULL
);
11484 cu
->line_header
= (struct line_header
*) *slot
;
11489 /* dwarf_decode_line_header does not yet provide sufficient information.
11490 We always have to call also dwarf_decode_lines for it. */
11491 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11495 cu
->line_header
= lh
.release ();
11496 cu
->line_header_die_owner
= die
;
11498 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11502 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11503 &line_header_local
,
11504 line_header_local_hash
, INSERT
);
11505 gdb_assert (slot
!= NULL
);
11507 if (slot
!= NULL
&& *slot
== NULL
)
11509 /* This newly decoded line number information unit will be owned
11510 by line_header_hash hash table. */
11511 *slot
= cu
->line_header
;
11512 cu
->line_header_die_owner
= NULL
;
11516 /* We cannot free any current entry in (*slot) as that struct line_header
11517 may be already used by multiple CUs. Create only temporary decoded
11518 line_header for this CU - it may happen at most once for each line
11519 number information unit. And if we're not using line_header_hash
11520 then this is what we want as well. */
11521 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11523 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11524 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11529 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11532 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11534 struct dwarf2_per_objfile
*dwarf2_per_objfile
11535 = cu
->per_cu
->dwarf2_per_objfile
;
11536 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11537 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11538 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11539 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11540 struct attribute
*attr
;
11541 struct die_info
*child_die
;
11542 CORE_ADDR baseaddr
;
11544 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11546 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11548 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11549 from finish_block. */
11550 if (lowpc
== ((CORE_ADDR
) -1))
11552 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11554 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11556 prepare_one_comp_unit (cu
, die
, cu
->language
);
11558 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11559 standardised yet. As a workaround for the language detection we fall
11560 back to the DW_AT_producer string. */
11561 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11562 cu
->language
= language_opencl
;
11564 /* Similar hack for Go. */
11565 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11566 set_cu_language (DW_LANG_Go
, cu
);
11568 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11570 /* Decode line number information if present. We do this before
11571 processing child DIEs, so that the line header table is available
11572 for DW_AT_decl_file. */
11573 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11575 /* Process all dies in compilation unit. */
11576 if (die
->child
!= NULL
)
11578 child_die
= die
->child
;
11579 while (child_die
&& child_die
->tag
)
11581 process_die (child_die
, cu
);
11582 child_die
= sibling_die (child_die
);
11586 /* Decode macro information, if present. Dwarf 2 macro information
11587 refers to information in the line number info statement program
11588 header, so we can only read it if we've read the header
11590 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11592 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11593 if (attr
&& cu
->line_header
)
11595 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11596 complaint (&symfile_complaints
,
11597 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11599 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11603 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11604 if (attr
&& cu
->line_header
)
11606 unsigned int macro_offset
= DW_UNSND (attr
);
11608 dwarf_decode_macros (cu
, macro_offset
, 0);
11613 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11614 Create the set of symtabs used by this TU, or if this TU is sharing
11615 symtabs with another TU and the symtabs have already been created
11616 then restore those symtabs in the line header.
11617 We don't need the pc/line-number mapping for type units. */
11620 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11622 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11623 struct type_unit_group
*tu_group
;
11625 struct attribute
*attr
;
11627 struct signatured_type
*sig_type
;
11629 gdb_assert (per_cu
->is_debug_types
);
11630 sig_type
= (struct signatured_type
*) per_cu
;
11632 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11634 /* If we're using .gdb_index (includes -readnow) then
11635 per_cu->type_unit_group may not have been set up yet. */
11636 if (sig_type
->type_unit_group
== NULL
)
11637 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11638 tu_group
= sig_type
->type_unit_group
;
11640 /* If we've already processed this stmt_list there's no real need to
11641 do it again, we could fake it and just recreate the part we need
11642 (file name,index -> symtab mapping). If data shows this optimization
11643 is useful we can do it then. */
11644 first_time
= tu_group
->compunit_symtab
== NULL
;
11646 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11651 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11652 lh
= dwarf_decode_line_header (line_offset
, cu
);
11657 dwarf2_start_symtab (cu
, "", NULL
, 0);
11660 gdb_assert (tu_group
->symtabs
== NULL
);
11661 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11666 cu
->line_header
= lh
.release ();
11667 cu
->line_header_die_owner
= die
;
11671 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11673 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11674 still initializing it, and our caller (a few levels up)
11675 process_full_type_unit still needs to know if this is the first
11678 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11679 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11680 cu
->line_header
->file_names
.size ());
11682 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11684 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11686 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11688 if (current_subfile
->symtab
== NULL
)
11690 /* NOTE: start_subfile will recognize when it's been
11691 passed a file it has already seen. So we can't
11692 assume there's a simple mapping from
11693 cu->line_header->file_names to subfiles, plus
11694 cu->line_header->file_names may contain dups. */
11695 current_subfile
->symtab
11696 = allocate_symtab (cust
, current_subfile
->name
);
11699 fe
.symtab
= current_subfile
->symtab
;
11700 tu_group
->symtabs
[i
] = fe
.symtab
;
11705 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11707 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11709 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11711 fe
.symtab
= tu_group
->symtabs
[i
];
11715 /* The main symtab is allocated last. Type units don't have DW_AT_name
11716 so they don't have a "real" (so to speak) symtab anyway.
11717 There is later code that will assign the main symtab to all symbols
11718 that don't have one. We need to handle the case of a symbol with a
11719 missing symtab (DW_AT_decl_file) anyway. */
11722 /* Process DW_TAG_type_unit.
11723 For TUs we want to skip the first top level sibling if it's not the
11724 actual type being defined by this TU. In this case the first top
11725 level sibling is there to provide context only. */
11728 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11730 struct die_info
*child_die
;
11732 prepare_one_comp_unit (cu
, die
, language_minimal
);
11734 /* Initialize (or reinitialize) the machinery for building symtabs.
11735 We do this before processing child DIEs, so that the line header table
11736 is available for DW_AT_decl_file. */
11737 setup_type_unit_groups (die
, cu
);
11739 if (die
->child
!= NULL
)
11741 child_die
= die
->child
;
11742 while (child_die
&& child_die
->tag
)
11744 process_die (child_die
, cu
);
11745 child_die
= sibling_die (child_die
);
11752 http://gcc.gnu.org/wiki/DebugFission
11753 http://gcc.gnu.org/wiki/DebugFissionDWP
11755 To simplify handling of both DWO files ("object" files with the DWARF info)
11756 and DWP files (a file with the DWOs packaged up into one file), we treat
11757 DWP files as having a collection of virtual DWO files. */
11760 hash_dwo_file (const void *item
)
11762 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11765 hash
= htab_hash_string (dwo_file
->dwo_name
);
11766 if (dwo_file
->comp_dir
!= NULL
)
11767 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11772 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11774 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11775 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11777 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11779 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11780 return lhs
->comp_dir
== rhs
->comp_dir
;
11781 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11784 /* Allocate a hash table for DWO files. */
11787 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11789 return htab_create_alloc_ex (41,
11793 &objfile
->objfile_obstack
,
11794 hashtab_obstack_allocate
,
11795 dummy_obstack_deallocate
);
11798 /* Lookup DWO file DWO_NAME. */
11801 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11802 const char *dwo_name
,
11803 const char *comp_dir
)
11805 struct dwo_file find_entry
;
11808 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11809 dwarf2_per_objfile
->dwo_files
11810 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11812 memset (&find_entry
, 0, sizeof (find_entry
));
11813 find_entry
.dwo_name
= dwo_name
;
11814 find_entry
.comp_dir
= comp_dir
;
11815 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11821 hash_dwo_unit (const void *item
)
11823 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11825 /* This drops the top 32 bits of the id, but is ok for a hash. */
11826 return dwo_unit
->signature
;
11830 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11832 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11833 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11835 /* The signature is assumed to be unique within the DWO file.
11836 So while object file CU dwo_id's always have the value zero,
11837 that's OK, assuming each object file DWO file has only one CU,
11838 and that's the rule for now. */
11839 return lhs
->signature
== rhs
->signature
;
11842 /* Allocate a hash table for DWO CUs,TUs.
11843 There is one of these tables for each of CUs,TUs for each DWO file. */
11846 allocate_dwo_unit_table (struct objfile
*objfile
)
11848 /* Start out with a pretty small number.
11849 Generally DWO files contain only one CU and maybe some TUs. */
11850 return htab_create_alloc_ex (3,
11854 &objfile
->objfile_obstack
,
11855 hashtab_obstack_allocate
,
11856 dummy_obstack_deallocate
);
11859 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11861 struct create_dwo_cu_data
11863 struct dwo_file
*dwo_file
;
11864 struct dwo_unit dwo_unit
;
11867 /* die_reader_func for create_dwo_cu. */
11870 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11871 const gdb_byte
*info_ptr
,
11872 struct die_info
*comp_unit_die
,
11876 struct dwarf2_cu
*cu
= reader
->cu
;
11877 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11878 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11879 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11880 struct dwo_file
*dwo_file
= data
->dwo_file
;
11881 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11882 struct attribute
*attr
;
11884 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11887 complaint (&symfile_complaints
,
11888 _("Dwarf Error: debug entry at offset %s is missing"
11889 " its dwo_id [in module %s]"),
11890 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11894 dwo_unit
->dwo_file
= dwo_file
;
11895 dwo_unit
->signature
= DW_UNSND (attr
);
11896 dwo_unit
->section
= section
;
11897 dwo_unit
->sect_off
= sect_off
;
11898 dwo_unit
->length
= cu
->per_cu
->length
;
11900 if (dwarf_read_debug
)
11901 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11902 sect_offset_str (sect_off
),
11903 hex_string (dwo_unit
->signature
));
11906 /* Create the dwo_units for the CUs in a DWO_FILE.
11907 Note: This function processes DWO files only, not DWP files. */
11910 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11911 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11914 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11915 const gdb_byte
*info_ptr
, *end_ptr
;
11917 dwarf2_read_section (objfile
, §ion
);
11918 info_ptr
= section
.buffer
;
11920 if (info_ptr
== NULL
)
11923 if (dwarf_read_debug
)
11925 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11926 get_section_name (§ion
),
11927 get_section_file_name (§ion
));
11930 end_ptr
= info_ptr
+ section
.size
;
11931 while (info_ptr
< end_ptr
)
11933 struct dwarf2_per_cu_data per_cu
;
11934 struct create_dwo_cu_data create_dwo_cu_data
;
11935 struct dwo_unit
*dwo_unit
;
11937 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11939 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11940 sizeof (create_dwo_cu_data
.dwo_unit
));
11941 memset (&per_cu
, 0, sizeof (per_cu
));
11942 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11943 per_cu
.is_debug_types
= 0;
11944 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11945 per_cu
.section
= §ion
;
11946 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11948 init_cutu_and_read_dies_no_follow (
11949 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11950 info_ptr
+= per_cu
.length
;
11952 // If the unit could not be parsed, skip it.
11953 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11956 if (cus_htab
== NULL
)
11957 cus_htab
= allocate_dwo_unit_table (objfile
);
11959 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11960 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11961 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11962 gdb_assert (slot
!= NULL
);
11965 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11966 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11968 complaint (&symfile_complaints
,
11969 _("debug cu entry at offset %s is duplicate to"
11970 " the entry at offset %s, signature %s"),
11971 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11972 hex_string (dwo_unit
->signature
));
11974 *slot
= (void *)dwo_unit
;
11978 /* DWP file .debug_{cu,tu}_index section format:
11979 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11983 Both index sections have the same format, and serve to map a 64-bit
11984 signature to a set of section numbers. Each section begins with a header,
11985 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11986 indexes, and a pool of 32-bit section numbers. The index sections will be
11987 aligned at 8-byte boundaries in the file.
11989 The index section header consists of:
11991 V, 32 bit version number
11993 N, 32 bit number of compilation units or type units in the index
11994 M, 32 bit number of slots in the hash table
11996 Numbers are recorded using the byte order of the application binary.
11998 The hash table begins at offset 16 in the section, and consists of an array
11999 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12000 order of the application binary). Unused slots in the hash table are 0.
12001 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12003 The parallel table begins immediately after the hash table
12004 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12005 array of 32-bit indexes (using the byte order of the application binary),
12006 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12007 table contains a 32-bit index into the pool of section numbers. For unused
12008 hash table slots, the corresponding entry in the parallel table will be 0.
12010 The pool of section numbers begins immediately following the hash table
12011 (at offset 16 + 12 * M from the beginning of the section). The pool of
12012 section numbers consists of an array of 32-bit words (using the byte order
12013 of the application binary). Each item in the array is indexed starting
12014 from 0. The hash table entry provides the index of the first section
12015 number in the set. Additional section numbers in the set follow, and the
12016 set is terminated by a 0 entry (section number 0 is not used in ELF).
12018 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12019 section must be the first entry in the set, and the .debug_abbrev.dwo must
12020 be the second entry. Other members of the set may follow in any order.
12026 DWP Version 2 combines all the .debug_info, etc. sections into one,
12027 and the entries in the index tables are now offsets into these sections.
12028 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12031 Index Section Contents:
12033 Hash Table of Signatures dwp_hash_table.hash_table
12034 Parallel Table of Indices dwp_hash_table.unit_table
12035 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12036 Table of Section Sizes dwp_hash_table.v2.sizes
12038 The index section header consists of:
12040 V, 32 bit version number
12041 L, 32 bit number of columns in the table of section offsets
12042 N, 32 bit number of compilation units or type units in the index
12043 M, 32 bit number of slots in the hash table
12045 Numbers are recorded using the byte order of the application binary.
12047 The hash table has the same format as version 1.
12048 The parallel table of indices has the same format as version 1,
12049 except that the entries are origin-1 indices into the table of sections
12050 offsets and the table of section sizes.
12052 The table of offsets begins immediately following the parallel table
12053 (at offset 16 + 12 * M from the beginning of the section). The table is
12054 a two-dimensional array of 32-bit words (using the byte order of the
12055 application binary), with L columns and N+1 rows, in row-major order.
12056 Each row in the array is indexed starting from 0. The first row provides
12057 a key to the remaining rows: each column in this row provides an identifier
12058 for a debug section, and the offsets in the same column of subsequent rows
12059 refer to that section. The section identifiers are:
12061 DW_SECT_INFO 1 .debug_info.dwo
12062 DW_SECT_TYPES 2 .debug_types.dwo
12063 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12064 DW_SECT_LINE 4 .debug_line.dwo
12065 DW_SECT_LOC 5 .debug_loc.dwo
12066 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12067 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12068 DW_SECT_MACRO 8 .debug_macro.dwo
12070 The offsets provided by the CU and TU index sections are the base offsets
12071 for the contributions made by each CU or TU to the corresponding section
12072 in the package file. Each CU and TU header contains an abbrev_offset
12073 field, used to find the abbreviations table for that CU or TU within the
12074 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12075 be interpreted as relative to the base offset given in the index section.
12076 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12077 should be interpreted as relative to the base offset for .debug_line.dwo,
12078 and offsets into other debug sections obtained from DWARF attributes should
12079 also be interpreted as relative to the corresponding base offset.
12081 The table of sizes begins immediately following the table of offsets.
12082 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12083 with L columns and N rows, in row-major order. Each row in the array is
12084 indexed starting from 1 (row 0 is shared by the two tables).
12088 Hash table lookup is handled the same in version 1 and 2:
12090 We assume that N and M will not exceed 2^32 - 1.
12091 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12093 Given a 64-bit compilation unit signature or a type signature S, an entry
12094 in the hash table is located as follows:
12096 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12097 the low-order k bits all set to 1.
12099 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12101 3) If the hash table entry at index H matches the signature, use that
12102 entry. If the hash table entry at index H is unused (all zeroes),
12103 terminate the search: the signature is not present in the table.
12105 4) Let H = (H + H') modulo M. Repeat at Step 3.
12107 Because M > N and H' and M are relatively prime, the search is guaranteed
12108 to stop at an unused slot or find the match. */
12110 /* Create a hash table to map DWO IDs to their CU/TU entry in
12111 .debug_{info,types}.dwo in DWP_FILE.
12112 Returns NULL if there isn't one.
12113 Note: This function processes DWP files only, not DWO files. */
12115 static struct dwp_hash_table
*
12116 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12117 struct dwp_file
*dwp_file
, int is_debug_types
)
12119 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12120 bfd
*dbfd
= dwp_file
->dbfd
;
12121 const gdb_byte
*index_ptr
, *index_end
;
12122 struct dwarf2_section_info
*index
;
12123 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12124 struct dwp_hash_table
*htab
;
12126 if (is_debug_types
)
12127 index
= &dwp_file
->sections
.tu_index
;
12129 index
= &dwp_file
->sections
.cu_index
;
12131 if (dwarf2_section_empty_p (index
))
12133 dwarf2_read_section (objfile
, index
);
12135 index_ptr
= index
->buffer
;
12136 index_end
= index_ptr
+ index
->size
;
12138 version
= read_4_bytes (dbfd
, index_ptr
);
12141 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12145 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12147 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12150 if (version
!= 1 && version
!= 2)
12152 error (_("Dwarf Error: unsupported DWP file version (%s)"
12153 " [in module %s]"),
12154 pulongest (version
), dwp_file
->name
);
12156 if (nr_slots
!= (nr_slots
& -nr_slots
))
12158 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12159 " is not power of 2 [in module %s]"),
12160 pulongest (nr_slots
), dwp_file
->name
);
12163 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12164 htab
->version
= version
;
12165 htab
->nr_columns
= nr_columns
;
12166 htab
->nr_units
= nr_units
;
12167 htab
->nr_slots
= nr_slots
;
12168 htab
->hash_table
= index_ptr
;
12169 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12171 /* Exit early if the table is empty. */
12172 if (nr_slots
== 0 || nr_units
== 0
12173 || (version
== 2 && nr_columns
== 0))
12175 /* All must be zero. */
12176 if (nr_slots
!= 0 || nr_units
!= 0
12177 || (version
== 2 && nr_columns
!= 0))
12179 complaint (&symfile_complaints
,
12180 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12181 " all zero [in modules %s]"),
12189 htab
->section_pool
.v1
.indices
=
12190 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12191 /* It's harder to decide whether the section is too small in v1.
12192 V1 is deprecated anyway so we punt. */
12196 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12197 int *ids
= htab
->section_pool
.v2
.section_ids
;
12198 /* Reverse map for error checking. */
12199 int ids_seen
[DW_SECT_MAX
+ 1];
12202 if (nr_columns
< 2)
12204 error (_("Dwarf Error: bad DWP hash table, too few columns"
12205 " in section table [in module %s]"),
12208 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12210 error (_("Dwarf Error: bad DWP hash table, too many columns"
12211 " in section table [in module %s]"),
12214 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12215 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12216 for (i
= 0; i
< nr_columns
; ++i
)
12218 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12220 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12222 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12223 " in section table [in module %s]"),
12224 id
, dwp_file
->name
);
12226 if (ids_seen
[id
] != -1)
12228 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12229 " id %d in section table [in module %s]"),
12230 id
, dwp_file
->name
);
12235 /* Must have exactly one info or types section. */
12236 if (((ids_seen
[DW_SECT_INFO
] != -1)
12237 + (ids_seen
[DW_SECT_TYPES
] != -1))
12240 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12241 " DWO info/types section [in module %s]"),
12244 /* Must have an abbrev section. */
12245 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12247 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12248 " section [in module %s]"),
12251 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12252 htab
->section_pool
.v2
.sizes
=
12253 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12254 * nr_units
* nr_columns
);
12255 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12256 * nr_units
* nr_columns
))
12259 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12260 " [in module %s]"),
12268 /* Update SECTIONS with the data from SECTP.
12270 This function is like the other "locate" section routines that are
12271 passed to bfd_map_over_sections, but in this context the sections to
12272 read comes from the DWP V1 hash table, not the full ELF section table.
12274 The result is non-zero for success, or zero if an error was found. */
12277 locate_v1_virtual_dwo_sections (asection
*sectp
,
12278 struct virtual_v1_dwo_sections
*sections
)
12280 const struct dwop_section_names
*names
= &dwop_section_names
;
12282 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12284 /* There can be only one. */
12285 if (sections
->abbrev
.s
.section
!= NULL
)
12287 sections
->abbrev
.s
.section
= sectp
;
12288 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12290 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12291 || section_is_p (sectp
->name
, &names
->types_dwo
))
12293 /* There can be only one. */
12294 if (sections
->info_or_types
.s
.section
!= NULL
)
12296 sections
->info_or_types
.s
.section
= sectp
;
12297 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12299 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12301 /* There can be only one. */
12302 if (sections
->line
.s
.section
!= NULL
)
12304 sections
->line
.s
.section
= sectp
;
12305 sections
->line
.size
= bfd_get_section_size (sectp
);
12307 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12309 /* There can be only one. */
12310 if (sections
->loc
.s
.section
!= NULL
)
12312 sections
->loc
.s
.section
= sectp
;
12313 sections
->loc
.size
= bfd_get_section_size (sectp
);
12315 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12317 /* There can be only one. */
12318 if (sections
->macinfo
.s
.section
!= NULL
)
12320 sections
->macinfo
.s
.section
= sectp
;
12321 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12323 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12325 /* There can be only one. */
12326 if (sections
->macro
.s
.section
!= NULL
)
12328 sections
->macro
.s
.section
= sectp
;
12329 sections
->macro
.size
= bfd_get_section_size (sectp
);
12331 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12333 /* There can be only one. */
12334 if (sections
->str_offsets
.s
.section
!= NULL
)
12336 sections
->str_offsets
.s
.section
= sectp
;
12337 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12341 /* No other kind of section is valid. */
12348 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12349 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12350 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12351 This is for DWP version 1 files. */
12353 static struct dwo_unit
*
12354 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12355 struct dwp_file
*dwp_file
,
12356 uint32_t unit_index
,
12357 const char *comp_dir
,
12358 ULONGEST signature
, int is_debug_types
)
12360 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12361 const struct dwp_hash_table
*dwp_htab
=
12362 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12363 bfd
*dbfd
= dwp_file
->dbfd
;
12364 const char *kind
= is_debug_types
? "TU" : "CU";
12365 struct dwo_file
*dwo_file
;
12366 struct dwo_unit
*dwo_unit
;
12367 struct virtual_v1_dwo_sections sections
;
12368 void **dwo_file_slot
;
12371 gdb_assert (dwp_file
->version
== 1);
12373 if (dwarf_read_debug
)
12375 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12377 pulongest (unit_index
), hex_string (signature
),
12381 /* Fetch the sections of this DWO unit.
12382 Put a limit on the number of sections we look for so that bad data
12383 doesn't cause us to loop forever. */
12385 #define MAX_NR_V1_DWO_SECTIONS \
12386 (1 /* .debug_info or .debug_types */ \
12387 + 1 /* .debug_abbrev */ \
12388 + 1 /* .debug_line */ \
12389 + 1 /* .debug_loc */ \
12390 + 1 /* .debug_str_offsets */ \
12391 + 1 /* .debug_macro or .debug_macinfo */ \
12392 + 1 /* trailing zero */)
12394 memset (§ions
, 0, sizeof (sections
));
12396 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12399 uint32_t section_nr
=
12400 read_4_bytes (dbfd
,
12401 dwp_htab
->section_pool
.v1
.indices
12402 + (unit_index
+ i
) * sizeof (uint32_t));
12404 if (section_nr
== 0)
12406 if (section_nr
>= dwp_file
->num_sections
)
12408 error (_("Dwarf Error: bad DWP hash table, section number too large"
12409 " [in module %s]"),
12413 sectp
= dwp_file
->elf_sections
[section_nr
];
12414 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12416 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12417 " [in module %s]"),
12423 || dwarf2_section_empty_p (§ions
.info_or_types
)
12424 || dwarf2_section_empty_p (§ions
.abbrev
))
12426 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12427 " [in module %s]"),
12430 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12432 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12433 " [in module %s]"),
12437 /* It's easier for the rest of the code if we fake a struct dwo_file and
12438 have dwo_unit "live" in that. At least for now.
12440 The DWP file can be made up of a random collection of CUs and TUs.
12441 However, for each CU + set of TUs that came from the same original DWO
12442 file, we can combine them back into a virtual DWO file to save space
12443 (fewer struct dwo_file objects to allocate). Remember that for really
12444 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12446 std::string virtual_dwo_name
=
12447 string_printf ("virtual-dwo/%d-%d-%d-%d",
12448 get_section_id (§ions
.abbrev
),
12449 get_section_id (§ions
.line
),
12450 get_section_id (§ions
.loc
),
12451 get_section_id (§ions
.str_offsets
));
12452 /* Can we use an existing virtual DWO file? */
12453 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12454 virtual_dwo_name
.c_str (),
12456 /* Create one if necessary. */
12457 if (*dwo_file_slot
== NULL
)
12459 if (dwarf_read_debug
)
12461 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12462 virtual_dwo_name
.c_str ());
12464 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12466 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12467 virtual_dwo_name
.c_str (),
12468 virtual_dwo_name
.size ());
12469 dwo_file
->comp_dir
= comp_dir
;
12470 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12471 dwo_file
->sections
.line
= sections
.line
;
12472 dwo_file
->sections
.loc
= sections
.loc
;
12473 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12474 dwo_file
->sections
.macro
= sections
.macro
;
12475 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12476 /* The "str" section is global to the entire DWP file. */
12477 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12478 /* The info or types section is assigned below to dwo_unit,
12479 there's no need to record it in dwo_file.
12480 Also, we can't simply record type sections in dwo_file because
12481 we record a pointer into the vector in dwo_unit. As we collect more
12482 types we'll grow the vector and eventually have to reallocate space
12483 for it, invalidating all copies of pointers into the previous
12485 *dwo_file_slot
= dwo_file
;
12489 if (dwarf_read_debug
)
12491 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12492 virtual_dwo_name
.c_str ());
12494 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12497 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12498 dwo_unit
->dwo_file
= dwo_file
;
12499 dwo_unit
->signature
= signature
;
12500 dwo_unit
->section
=
12501 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12502 *dwo_unit
->section
= sections
.info_or_types
;
12503 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12508 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12509 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12510 piece within that section used by a TU/CU, return a virtual section
12511 of just that piece. */
12513 static struct dwarf2_section_info
12514 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12515 struct dwarf2_section_info
*section
,
12516 bfd_size_type offset
, bfd_size_type size
)
12518 struct dwarf2_section_info result
;
12521 gdb_assert (section
!= NULL
);
12522 gdb_assert (!section
->is_virtual
);
12524 memset (&result
, 0, sizeof (result
));
12525 result
.s
.containing_section
= section
;
12526 result
.is_virtual
= 1;
12531 sectp
= get_section_bfd_section (section
);
12533 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12534 bounds of the real section. This is a pretty-rare event, so just
12535 flag an error (easier) instead of a warning and trying to cope. */
12537 || offset
+ size
> bfd_get_section_size (sectp
))
12539 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12540 " in section %s [in module %s]"),
12541 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12542 objfile_name (dwarf2_per_objfile
->objfile
));
12545 result
.virtual_offset
= offset
;
12546 result
.size
= size
;
12550 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12551 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12552 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12553 This is for DWP version 2 files. */
12555 static struct dwo_unit
*
12556 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12557 struct dwp_file
*dwp_file
,
12558 uint32_t unit_index
,
12559 const char *comp_dir
,
12560 ULONGEST signature
, int is_debug_types
)
12562 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12563 const struct dwp_hash_table
*dwp_htab
=
12564 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12565 bfd
*dbfd
= dwp_file
->dbfd
;
12566 const char *kind
= is_debug_types
? "TU" : "CU";
12567 struct dwo_file
*dwo_file
;
12568 struct dwo_unit
*dwo_unit
;
12569 struct virtual_v2_dwo_sections sections
;
12570 void **dwo_file_slot
;
12573 gdb_assert (dwp_file
->version
== 2);
12575 if (dwarf_read_debug
)
12577 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12579 pulongest (unit_index
), hex_string (signature
),
12583 /* Fetch the section offsets of this DWO unit. */
12585 memset (§ions
, 0, sizeof (sections
));
12587 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12589 uint32_t offset
= read_4_bytes (dbfd
,
12590 dwp_htab
->section_pool
.v2
.offsets
12591 + (((unit_index
- 1) * dwp_htab
->nr_columns
12593 * sizeof (uint32_t)));
12594 uint32_t size
= read_4_bytes (dbfd
,
12595 dwp_htab
->section_pool
.v2
.sizes
12596 + (((unit_index
- 1) * dwp_htab
->nr_columns
12598 * sizeof (uint32_t)));
12600 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12603 case DW_SECT_TYPES
:
12604 sections
.info_or_types_offset
= offset
;
12605 sections
.info_or_types_size
= size
;
12607 case DW_SECT_ABBREV
:
12608 sections
.abbrev_offset
= offset
;
12609 sections
.abbrev_size
= size
;
12612 sections
.line_offset
= offset
;
12613 sections
.line_size
= size
;
12616 sections
.loc_offset
= offset
;
12617 sections
.loc_size
= size
;
12619 case DW_SECT_STR_OFFSETS
:
12620 sections
.str_offsets_offset
= offset
;
12621 sections
.str_offsets_size
= size
;
12623 case DW_SECT_MACINFO
:
12624 sections
.macinfo_offset
= offset
;
12625 sections
.macinfo_size
= size
;
12627 case DW_SECT_MACRO
:
12628 sections
.macro_offset
= offset
;
12629 sections
.macro_size
= size
;
12634 /* It's easier for the rest of the code if we fake a struct dwo_file and
12635 have dwo_unit "live" in that. At least for now.
12637 The DWP file can be made up of a random collection of CUs and TUs.
12638 However, for each CU + set of TUs that came from the same original DWO
12639 file, we can combine them back into a virtual DWO file to save space
12640 (fewer struct dwo_file objects to allocate). Remember that for really
12641 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12643 std::string virtual_dwo_name
=
12644 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12645 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12646 (long) (sections
.line_size
? sections
.line_offset
: 0),
12647 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12648 (long) (sections
.str_offsets_size
12649 ? sections
.str_offsets_offset
: 0));
12650 /* Can we use an existing virtual DWO file? */
12651 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12652 virtual_dwo_name
.c_str (),
12654 /* Create one if necessary. */
12655 if (*dwo_file_slot
== NULL
)
12657 if (dwarf_read_debug
)
12659 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12660 virtual_dwo_name
.c_str ());
12662 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12664 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12665 virtual_dwo_name
.c_str (),
12666 virtual_dwo_name
.size ());
12667 dwo_file
->comp_dir
= comp_dir
;
12668 dwo_file
->sections
.abbrev
=
12669 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12670 sections
.abbrev_offset
, sections
.abbrev_size
);
12671 dwo_file
->sections
.line
=
12672 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12673 sections
.line_offset
, sections
.line_size
);
12674 dwo_file
->sections
.loc
=
12675 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12676 sections
.loc_offset
, sections
.loc_size
);
12677 dwo_file
->sections
.macinfo
=
12678 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12679 sections
.macinfo_offset
, sections
.macinfo_size
);
12680 dwo_file
->sections
.macro
=
12681 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12682 sections
.macro_offset
, sections
.macro_size
);
12683 dwo_file
->sections
.str_offsets
=
12684 create_dwp_v2_section (dwarf2_per_objfile
,
12685 &dwp_file
->sections
.str_offsets
,
12686 sections
.str_offsets_offset
,
12687 sections
.str_offsets_size
);
12688 /* The "str" section is global to the entire DWP file. */
12689 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12690 /* The info or types section is assigned below to dwo_unit,
12691 there's no need to record it in dwo_file.
12692 Also, we can't simply record type sections in dwo_file because
12693 we record a pointer into the vector in dwo_unit. As we collect more
12694 types we'll grow the vector and eventually have to reallocate space
12695 for it, invalidating all copies of pointers into the previous
12697 *dwo_file_slot
= dwo_file
;
12701 if (dwarf_read_debug
)
12703 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12704 virtual_dwo_name
.c_str ());
12706 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12709 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12710 dwo_unit
->dwo_file
= dwo_file
;
12711 dwo_unit
->signature
= signature
;
12712 dwo_unit
->section
=
12713 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12714 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12716 ? &dwp_file
->sections
.types
12717 : &dwp_file
->sections
.info
,
12718 sections
.info_or_types_offset
,
12719 sections
.info_or_types_size
);
12720 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12725 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12726 Returns NULL if the signature isn't found. */
12728 static struct dwo_unit
*
12729 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12730 struct dwp_file
*dwp_file
, const char *comp_dir
,
12731 ULONGEST signature
, int is_debug_types
)
12733 const struct dwp_hash_table
*dwp_htab
=
12734 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12735 bfd
*dbfd
= dwp_file
->dbfd
;
12736 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12737 uint32_t hash
= signature
& mask
;
12738 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12741 struct dwo_unit find_dwo_cu
;
12743 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12744 find_dwo_cu
.signature
= signature
;
12745 slot
= htab_find_slot (is_debug_types
12746 ? dwp_file
->loaded_tus
12747 : dwp_file
->loaded_cus
,
12748 &find_dwo_cu
, INSERT
);
12751 return (struct dwo_unit
*) *slot
;
12753 /* Use a for loop so that we don't loop forever on bad debug info. */
12754 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12756 ULONGEST signature_in_table
;
12758 signature_in_table
=
12759 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12760 if (signature_in_table
== signature
)
12762 uint32_t unit_index
=
12763 read_4_bytes (dbfd
,
12764 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12766 if (dwp_file
->version
== 1)
12768 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12769 dwp_file
, unit_index
,
12770 comp_dir
, signature
,
12775 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12776 dwp_file
, unit_index
,
12777 comp_dir
, signature
,
12780 return (struct dwo_unit
*) *slot
;
12782 if (signature_in_table
== 0)
12784 hash
= (hash
+ hash2
) & mask
;
12787 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12788 " [in module %s]"),
12792 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12793 Open the file specified by FILE_NAME and hand it off to BFD for
12794 preliminary analysis. Return a newly initialized bfd *, which
12795 includes a canonicalized copy of FILE_NAME.
12796 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12797 SEARCH_CWD is true if the current directory is to be searched.
12798 It will be searched before debug-file-directory.
12799 If successful, the file is added to the bfd include table of the
12800 objfile's bfd (see gdb_bfd_record_inclusion).
12801 If unable to find/open the file, return NULL.
12802 NOTE: This function is derived from symfile_bfd_open. */
12804 static gdb_bfd_ref_ptr
12805 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12806 const char *file_name
, int is_dwp
, int search_cwd
)
12809 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12810 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12811 to debug_file_directory. */
12812 const char *search_path
;
12813 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12815 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12818 if (*debug_file_directory
!= '\0')
12820 search_path_holder
.reset (concat (".", dirname_separator_string
,
12821 debug_file_directory
,
12823 search_path
= search_path_holder
.get ();
12829 search_path
= debug_file_directory
;
12831 openp_flags flags
= OPF_RETURN_REALPATH
;
12833 flags
|= OPF_SEARCH_IN_PATH
;
12835 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12836 desc
= openp (search_path
, flags
, file_name
,
12837 O_RDONLY
| O_BINARY
, &absolute_name
);
12841 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12843 if (sym_bfd
== NULL
)
12845 bfd_set_cacheable (sym_bfd
.get (), 1);
12847 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12850 /* Success. Record the bfd as having been included by the objfile's bfd.
12851 This is important because things like demangled_names_hash lives in the
12852 objfile's per_bfd space and may have references to things like symbol
12853 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12854 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12859 /* Try to open DWO file FILE_NAME.
12860 COMP_DIR is the DW_AT_comp_dir attribute.
12861 The result is the bfd handle of the file.
12862 If there is a problem finding or opening the file, return NULL.
12863 Upon success, the canonicalized path of the file is stored in the bfd,
12864 same as symfile_bfd_open. */
12866 static gdb_bfd_ref_ptr
12867 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12868 const char *file_name
, const char *comp_dir
)
12870 if (IS_ABSOLUTE_PATH (file_name
))
12871 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12872 0 /*is_dwp*/, 0 /*search_cwd*/);
12874 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12876 if (comp_dir
!= NULL
)
12878 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12879 file_name
, (char *) NULL
);
12881 /* NOTE: If comp_dir is a relative path, this will also try the
12882 search path, which seems useful. */
12883 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12886 1 /*search_cwd*/));
12887 xfree (path_to_try
);
12892 /* That didn't work, try debug-file-directory, which, despite its name,
12893 is a list of paths. */
12895 if (*debug_file_directory
== '\0')
12898 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12899 0 /*is_dwp*/, 1 /*search_cwd*/);
12902 /* This function is mapped across the sections and remembers the offset and
12903 size of each of the DWO debugging sections we are interested in. */
12906 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12908 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12909 const struct dwop_section_names
*names
= &dwop_section_names
;
12911 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12913 dwo_sections
->abbrev
.s
.section
= sectp
;
12914 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12916 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12918 dwo_sections
->info
.s
.section
= sectp
;
12919 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12921 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12923 dwo_sections
->line
.s
.section
= sectp
;
12924 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12926 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12928 dwo_sections
->loc
.s
.section
= sectp
;
12929 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12931 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12933 dwo_sections
->macinfo
.s
.section
= sectp
;
12934 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12936 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12938 dwo_sections
->macro
.s
.section
= sectp
;
12939 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12941 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12943 dwo_sections
->str
.s
.section
= sectp
;
12944 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12946 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12948 dwo_sections
->str_offsets
.s
.section
= sectp
;
12949 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12951 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12953 struct dwarf2_section_info type_section
;
12955 memset (&type_section
, 0, sizeof (type_section
));
12956 type_section
.s
.section
= sectp
;
12957 type_section
.size
= bfd_get_section_size (sectp
);
12958 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12963 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12964 by PER_CU. This is for the non-DWP case.
12965 The result is NULL if DWO_NAME can't be found. */
12967 static struct dwo_file
*
12968 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12969 const char *dwo_name
, const char *comp_dir
)
12971 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12972 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12974 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12977 if (dwarf_read_debug
)
12978 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12982 /* We use a unique pointer here, despite the obstack allocation,
12983 because a dwo_file needs some cleanup if it is abandoned. */
12984 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12986 dwo_file
->dwo_name
= dwo_name
;
12987 dwo_file
->comp_dir
= comp_dir
;
12988 dwo_file
->dbfd
= dbfd
.release ();
12990 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12991 &dwo_file
->sections
);
12993 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12996 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12997 dwo_file
->sections
.types
, dwo_file
->tus
);
12999 if (dwarf_read_debug
)
13000 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13002 return dwo_file
.release ();
13005 /* This function is mapped across the sections and remembers the offset and
13006 size of each of the DWP debugging sections common to version 1 and 2 that
13007 we are interested in. */
13010 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13011 void *dwp_file_ptr
)
13013 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13014 const struct dwop_section_names
*names
= &dwop_section_names
;
13015 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13017 /* Record the ELF section number for later lookup: this is what the
13018 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13019 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13020 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13022 /* Look for specific sections that we need. */
13023 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13025 dwp_file
->sections
.str
.s
.section
= sectp
;
13026 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
13028 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13030 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13031 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
13033 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13035 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13036 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
13040 /* This function is mapped across the sections and remembers the offset and
13041 size of each of the DWP version 2 debugging sections that we are interested
13042 in. This is split into a separate function because we don't know if we
13043 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13046 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13048 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13049 const struct dwop_section_names
*names
= &dwop_section_names
;
13050 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13052 /* Record the ELF section number for later lookup: this is what the
13053 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13054 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13055 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13057 /* Look for specific sections that we need. */
13058 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13060 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13061 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
13063 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13065 dwp_file
->sections
.info
.s
.section
= sectp
;
13066 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
13068 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13070 dwp_file
->sections
.line
.s
.section
= sectp
;
13071 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13073 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13075 dwp_file
->sections
.loc
.s
.section
= sectp
;
13076 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13078 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13080 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13081 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13083 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13085 dwp_file
->sections
.macro
.s
.section
= sectp
;
13086 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13088 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13090 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13091 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13093 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13095 dwp_file
->sections
.types
.s
.section
= sectp
;
13096 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13100 /* Hash function for dwp_file loaded CUs/TUs. */
13103 hash_dwp_loaded_cutus (const void *item
)
13105 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13107 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13108 return dwo_unit
->signature
;
13111 /* Equality function for dwp_file loaded CUs/TUs. */
13114 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13116 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13117 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13119 return dua
->signature
== dub
->signature
;
13122 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13125 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13127 return htab_create_alloc_ex (3,
13128 hash_dwp_loaded_cutus
,
13129 eq_dwp_loaded_cutus
,
13131 &objfile
->objfile_obstack
,
13132 hashtab_obstack_allocate
,
13133 dummy_obstack_deallocate
);
13136 /* Try to open DWP file FILE_NAME.
13137 The result is the bfd handle of the file.
13138 If there is a problem finding or opening the file, return NULL.
13139 Upon success, the canonicalized path of the file is stored in the bfd,
13140 same as symfile_bfd_open. */
13142 static gdb_bfd_ref_ptr
13143 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13144 const char *file_name
)
13146 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13148 1 /*search_cwd*/));
13152 /* Work around upstream bug 15652.
13153 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13154 [Whether that's a "bug" is debatable, but it is getting in our way.]
13155 We have no real idea where the dwp file is, because gdb's realpath-ing
13156 of the executable's path may have discarded the needed info.
13157 [IWBN if the dwp file name was recorded in the executable, akin to
13158 .gnu_debuglink, but that doesn't exist yet.]
13159 Strip the directory from FILE_NAME and search again. */
13160 if (*debug_file_directory
!= '\0')
13162 /* Don't implicitly search the current directory here.
13163 If the user wants to search "." to handle this case,
13164 it must be added to debug-file-directory. */
13165 return try_open_dwop_file (dwarf2_per_objfile
,
13166 lbasename (file_name
), 1 /*is_dwp*/,
13173 /* Initialize the use of the DWP file for the current objfile.
13174 By convention the name of the DWP file is ${objfile}.dwp.
13175 The result is NULL if it can't be found. */
13177 static struct dwp_file
*
13178 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13180 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13181 struct dwp_file
*dwp_file
;
13183 /* Try to find first .dwp for the binary file before any symbolic links
13186 /* If the objfile is a debug file, find the name of the real binary
13187 file and get the name of dwp file from there. */
13188 std::string dwp_name
;
13189 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13191 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13192 const char *backlink_basename
= lbasename (backlink
->original_name
);
13194 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13197 dwp_name
= objfile
->original_name
;
13199 dwp_name
+= ".dwp";
13201 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13203 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13205 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13206 dwp_name
= objfile_name (objfile
);
13207 dwp_name
+= ".dwp";
13208 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13213 if (dwarf_read_debug
)
13214 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13217 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
13218 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
13219 dwp_file
->dbfd
= dbfd
.release ();
13221 /* +1: section 0 is unused */
13222 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13223 dwp_file
->elf_sections
=
13224 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13225 dwp_file
->num_sections
, asection
*);
13227 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
13230 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 0);
13232 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 1);
13234 /* The DWP file version is stored in the hash table. Oh well. */
13235 if (dwp_file
->cus
&& dwp_file
->tus
13236 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13238 /* Technically speaking, we should try to limp along, but this is
13239 pretty bizarre. We use pulongest here because that's the established
13240 portability solution (e.g, we cannot use %u for uint32_t). */
13241 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13242 " TU version %s [in DWP file %s]"),
13243 pulongest (dwp_file
->cus
->version
),
13244 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13248 dwp_file
->version
= dwp_file
->cus
->version
;
13249 else if (dwp_file
->tus
)
13250 dwp_file
->version
= dwp_file
->tus
->version
;
13252 dwp_file
->version
= 2;
13254 if (dwp_file
->version
== 2)
13255 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
13258 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13259 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13261 if (dwarf_read_debug
)
13263 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13264 fprintf_unfiltered (gdb_stdlog
,
13265 " %s CUs, %s TUs\n",
13266 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13267 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13273 /* Wrapper around open_and_init_dwp_file, only open it once. */
13275 static struct dwp_file
*
13276 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13278 if (! dwarf2_per_objfile
->dwp_checked
)
13280 dwarf2_per_objfile
->dwp_file
13281 = open_and_init_dwp_file (dwarf2_per_objfile
);
13282 dwarf2_per_objfile
->dwp_checked
= 1;
13284 return dwarf2_per_objfile
->dwp_file
;
13287 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13288 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13289 or in the DWP file for the objfile, referenced by THIS_UNIT.
13290 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13291 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13293 This is called, for example, when wanting to read a variable with a
13294 complex location. Therefore we don't want to do file i/o for every call.
13295 Therefore we don't want to look for a DWO file on every call.
13296 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13297 then we check if we've already seen DWO_NAME, and only THEN do we check
13300 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13301 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13303 static struct dwo_unit
*
13304 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13305 const char *dwo_name
, const char *comp_dir
,
13306 ULONGEST signature
, int is_debug_types
)
13308 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13309 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13310 const char *kind
= is_debug_types
? "TU" : "CU";
13311 void **dwo_file_slot
;
13312 struct dwo_file
*dwo_file
;
13313 struct dwp_file
*dwp_file
;
13315 /* First see if there's a DWP file.
13316 If we have a DWP file but didn't find the DWO inside it, don't
13317 look for the original DWO file. It makes gdb behave differently
13318 depending on whether one is debugging in the build tree. */
13320 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13321 if (dwp_file
!= NULL
)
13323 const struct dwp_hash_table
*dwp_htab
=
13324 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13326 if (dwp_htab
!= NULL
)
13328 struct dwo_unit
*dwo_cutu
=
13329 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13330 signature
, is_debug_types
);
13332 if (dwo_cutu
!= NULL
)
13334 if (dwarf_read_debug
)
13336 fprintf_unfiltered (gdb_stdlog
,
13337 "Virtual DWO %s %s found: @%s\n",
13338 kind
, hex_string (signature
),
13339 host_address_to_string (dwo_cutu
));
13347 /* No DWP file, look for the DWO file. */
13349 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13350 dwo_name
, comp_dir
);
13351 if (*dwo_file_slot
== NULL
)
13353 /* Read in the file and build a table of the CUs/TUs it contains. */
13354 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13356 /* NOTE: This will be NULL if unable to open the file. */
13357 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13359 if (dwo_file
!= NULL
)
13361 struct dwo_unit
*dwo_cutu
= NULL
;
13363 if (is_debug_types
&& dwo_file
->tus
)
13365 struct dwo_unit find_dwo_cutu
;
13367 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13368 find_dwo_cutu
.signature
= signature
;
13370 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13372 else if (!is_debug_types
&& dwo_file
->cus
)
13374 struct dwo_unit find_dwo_cutu
;
13376 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13377 find_dwo_cutu
.signature
= signature
;
13378 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13382 if (dwo_cutu
!= NULL
)
13384 if (dwarf_read_debug
)
13386 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13387 kind
, dwo_name
, hex_string (signature
),
13388 host_address_to_string (dwo_cutu
));
13395 /* We didn't find it. This could mean a dwo_id mismatch, or
13396 someone deleted the DWO/DWP file, or the search path isn't set up
13397 correctly to find the file. */
13399 if (dwarf_read_debug
)
13401 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13402 kind
, dwo_name
, hex_string (signature
));
13405 /* This is a warning and not a complaint because it can be caused by
13406 pilot error (e.g., user accidentally deleting the DWO). */
13408 /* Print the name of the DWP file if we looked there, helps the user
13409 better diagnose the problem. */
13410 std::string dwp_text
;
13412 if (dwp_file
!= NULL
)
13413 dwp_text
= string_printf (" [in DWP file %s]",
13414 lbasename (dwp_file
->name
));
13416 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13417 " [in module %s]"),
13418 kind
, dwo_name
, hex_string (signature
),
13420 this_unit
->is_debug_types
? "TU" : "CU",
13421 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13426 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13427 See lookup_dwo_cutu_unit for details. */
13429 static struct dwo_unit
*
13430 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13431 const char *dwo_name
, const char *comp_dir
,
13432 ULONGEST signature
)
13434 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13437 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13438 See lookup_dwo_cutu_unit for details. */
13440 static struct dwo_unit
*
13441 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13442 const char *dwo_name
, const char *comp_dir
)
13444 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13447 /* Traversal function for queue_and_load_all_dwo_tus. */
13450 queue_and_load_dwo_tu (void **slot
, void *info
)
13452 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13453 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13454 ULONGEST signature
= dwo_unit
->signature
;
13455 struct signatured_type
*sig_type
=
13456 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13458 if (sig_type
!= NULL
)
13460 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13462 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13463 a real dependency of PER_CU on SIG_TYPE. That is detected later
13464 while processing PER_CU. */
13465 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13466 load_full_type_unit (sig_cu
);
13467 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13473 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13474 The DWO may have the only definition of the type, though it may not be
13475 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13476 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13479 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13481 struct dwo_unit
*dwo_unit
;
13482 struct dwo_file
*dwo_file
;
13484 gdb_assert (!per_cu
->is_debug_types
);
13485 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13486 gdb_assert (per_cu
->cu
!= NULL
);
13488 dwo_unit
= per_cu
->cu
->dwo_unit
;
13489 gdb_assert (dwo_unit
!= NULL
);
13491 dwo_file
= dwo_unit
->dwo_file
;
13492 if (dwo_file
->tus
!= NULL
)
13493 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13496 /* Free all resources associated with DWO_FILE.
13497 Close the DWO file and munmap the sections. */
13500 free_dwo_file (struct dwo_file
*dwo_file
)
13502 /* Note: dbfd is NULL for virtual DWO files. */
13503 gdb_bfd_unref (dwo_file
->dbfd
);
13505 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13508 /* Traversal function for free_dwo_files. */
13511 free_dwo_file_from_slot (void **slot
, void *info
)
13513 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13515 free_dwo_file (dwo_file
);
13520 /* Free all resources associated with DWO_FILES. */
13523 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13525 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13528 /* Read in various DIEs. */
13530 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13531 Inherit only the children of the DW_AT_abstract_origin DIE not being
13532 already referenced by DW_AT_abstract_origin from the children of the
13536 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13538 struct die_info
*child_die
;
13539 sect_offset
*offsetp
;
13540 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13541 struct die_info
*origin_die
;
13542 /* Iterator of the ORIGIN_DIE children. */
13543 struct die_info
*origin_child_die
;
13544 struct attribute
*attr
;
13545 struct dwarf2_cu
*origin_cu
;
13546 struct pending
**origin_previous_list_in_scope
;
13548 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13552 /* Note that following die references may follow to a die in a
13556 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13558 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13560 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13561 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13563 if (die
->tag
!= origin_die
->tag
13564 && !(die
->tag
== DW_TAG_inlined_subroutine
13565 && origin_die
->tag
== DW_TAG_subprogram
))
13566 complaint (&symfile_complaints
,
13567 _("DIE %s and its abstract origin %s have different tags"),
13568 sect_offset_str (die
->sect_off
),
13569 sect_offset_str (origin_die
->sect_off
));
13571 std::vector
<sect_offset
> offsets
;
13573 for (child_die
= die
->child
;
13574 child_die
&& child_die
->tag
;
13575 child_die
= sibling_die (child_die
))
13577 struct die_info
*child_origin_die
;
13578 struct dwarf2_cu
*child_origin_cu
;
13580 /* We are trying to process concrete instance entries:
13581 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13582 it's not relevant to our analysis here. i.e. detecting DIEs that are
13583 present in the abstract instance but not referenced in the concrete
13585 if (child_die
->tag
== DW_TAG_call_site
13586 || child_die
->tag
== DW_TAG_GNU_call_site
)
13589 /* For each CHILD_DIE, find the corresponding child of
13590 ORIGIN_DIE. If there is more than one layer of
13591 DW_AT_abstract_origin, follow them all; there shouldn't be,
13592 but GCC versions at least through 4.4 generate this (GCC PR
13594 child_origin_die
= child_die
;
13595 child_origin_cu
= cu
;
13598 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13602 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13606 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13607 counterpart may exist. */
13608 if (child_origin_die
!= child_die
)
13610 if (child_die
->tag
!= child_origin_die
->tag
13611 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13612 && child_origin_die
->tag
== DW_TAG_subprogram
))
13613 complaint (&symfile_complaints
,
13614 _("Child DIE %s and its abstract origin %s have "
13616 sect_offset_str (child_die
->sect_off
),
13617 sect_offset_str (child_origin_die
->sect_off
));
13618 if (child_origin_die
->parent
!= origin_die
)
13619 complaint (&symfile_complaints
,
13620 _("Child DIE %s and its abstract origin %s have "
13621 "different parents"),
13622 sect_offset_str (child_die
->sect_off
),
13623 sect_offset_str (child_origin_die
->sect_off
));
13625 offsets
.push_back (child_origin_die
->sect_off
);
13628 std::sort (offsets
.begin (), offsets
.end ());
13629 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13630 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13631 if (offsetp
[-1] == *offsetp
)
13632 complaint (&symfile_complaints
,
13633 _("Multiple children of DIE %s refer "
13634 "to DIE %s as their abstract origin"),
13635 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13637 offsetp
= offsets
.data ();
13638 origin_child_die
= origin_die
->child
;
13639 while (origin_child_die
&& origin_child_die
->tag
)
13641 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13642 while (offsetp
< offsets_end
13643 && *offsetp
< origin_child_die
->sect_off
)
13645 if (offsetp
>= offsets_end
13646 || *offsetp
> origin_child_die
->sect_off
)
13648 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13649 Check whether we're already processing ORIGIN_CHILD_DIE.
13650 This can happen with mutually referenced abstract_origins.
13652 if (!origin_child_die
->in_process
)
13653 process_die (origin_child_die
, origin_cu
);
13655 origin_child_die
= sibling_die (origin_child_die
);
13657 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13661 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13663 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13664 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13665 struct context_stack
*newobj
;
13668 struct die_info
*child_die
;
13669 struct attribute
*attr
, *call_line
, *call_file
;
13671 CORE_ADDR baseaddr
;
13672 struct block
*block
;
13673 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13674 std::vector
<struct symbol
*> template_args
;
13675 struct template_symbol
*templ_func
= NULL
;
13679 /* If we do not have call site information, we can't show the
13680 caller of this inlined function. That's too confusing, so
13681 only use the scope for local variables. */
13682 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13683 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13684 if (call_line
== NULL
|| call_file
== NULL
)
13686 read_lexical_block_scope (die
, cu
);
13691 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13693 name
= dwarf2_name (die
, cu
);
13695 /* Ignore functions with missing or empty names. These are actually
13696 illegal according to the DWARF standard. */
13699 complaint (&symfile_complaints
,
13700 _("missing name for subprogram DIE at %s"),
13701 sect_offset_str (die
->sect_off
));
13705 /* Ignore functions with missing or invalid low and high pc attributes. */
13706 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13707 <= PC_BOUNDS_INVALID
)
13709 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13710 if (!attr
|| !DW_UNSND (attr
))
13711 complaint (&symfile_complaints
,
13712 _("cannot get low and high bounds "
13713 "for subprogram DIE at %s"),
13714 sect_offset_str (die
->sect_off
));
13718 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13719 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13721 /* If we have any template arguments, then we must allocate a
13722 different sort of symbol. */
13723 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13725 if (child_die
->tag
== DW_TAG_template_type_param
13726 || child_die
->tag
== DW_TAG_template_value_param
)
13728 templ_func
= allocate_template_symbol (objfile
);
13729 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13734 newobj
= push_context (0, lowpc
);
13735 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13736 (struct symbol
*) templ_func
);
13738 /* If there is a location expression for DW_AT_frame_base, record
13740 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13742 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13744 /* If there is a location for the static link, record it. */
13745 newobj
->static_link
= NULL
;
13746 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13749 newobj
->static_link
13750 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13751 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13754 cu
->list_in_scope
= &local_symbols
;
13756 if (die
->child
!= NULL
)
13758 child_die
= die
->child
;
13759 while (child_die
&& child_die
->tag
)
13761 if (child_die
->tag
== DW_TAG_template_type_param
13762 || child_die
->tag
== DW_TAG_template_value_param
)
13764 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13767 template_args
.push_back (arg
);
13770 process_die (child_die
, cu
);
13771 child_die
= sibling_die (child_die
);
13775 inherit_abstract_dies (die
, cu
);
13777 /* If we have a DW_AT_specification, we might need to import using
13778 directives from the context of the specification DIE. See the
13779 comment in determine_prefix. */
13780 if (cu
->language
== language_cplus
13781 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13783 struct dwarf2_cu
*spec_cu
= cu
;
13784 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13788 child_die
= spec_die
->child
;
13789 while (child_die
&& child_die
->tag
)
13791 if (child_die
->tag
== DW_TAG_imported_module
)
13792 process_die (child_die
, spec_cu
);
13793 child_die
= sibling_die (child_die
);
13796 /* In some cases, GCC generates specification DIEs that
13797 themselves contain DW_AT_specification attributes. */
13798 spec_die
= die_specification (spec_die
, &spec_cu
);
13802 newobj
= pop_context ();
13803 /* Make a block for the local symbols within. */
13804 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13805 newobj
->static_link
, lowpc
, highpc
);
13807 /* For C++, set the block's scope. */
13808 if ((cu
->language
== language_cplus
13809 || cu
->language
== language_fortran
13810 || cu
->language
== language_d
13811 || cu
->language
== language_rust
)
13812 && cu
->processing_has_namespace_info
)
13813 block_set_scope (block
, determine_prefix (die
, cu
),
13814 &objfile
->objfile_obstack
);
13816 /* If we have address ranges, record them. */
13817 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13819 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13821 /* Attach template arguments to function. */
13822 if (!template_args
.empty ())
13824 gdb_assert (templ_func
!= NULL
);
13826 templ_func
->n_template_arguments
= template_args
.size ();
13827 templ_func
->template_arguments
13828 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13829 templ_func
->n_template_arguments
);
13830 memcpy (templ_func
->template_arguments
,
13831 template_args
.data (),
13832 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13835 /* In C++, we can have functions nested inside functions (e.g., when
13836 a function declares a class that has methods). This means that
13837 when we finish processing a function scope, we may need to go
13838 back to building a containing block's symbol lists. */
13839 local_symbols
= newobj
->locals
;
13840 local_using_directives
= newobj
->local_using_directives
;
13842 /* If we've finished processing a top-level function, subsequent
13843 symbols go in the file symbol list. */
13844 if (outermost_context_p ())
13845 cu
->list_in_scope
= &file_symbols
;
13848 /* Process all the DIES contained within a lexical block scope. Start
13849 a new scope, process the dies, and then close the scope. */
13852 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13854 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13855 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13856 struct context_stack
*newobj
;
13857 CORE_ADDR lowpc
, highpc
;
13858 struct die_info
*child_die
;
13859 CORE_ADDR baseaddr
;
13861 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13863 /* Ignore blocks with missing or invalid low and high pc attributes. */
13864 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13865 as multiple lexical blocks? Handling children in a sane way would
13866 be nasty. Might be easier to properly extend generic blocks to
13867 describe ranges. */
13868 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13870 case PC_BOUNDS_NOT_PRESENT
:
13871 /* DW_TAG_lexical_block has no attributes, process its children as if
13872 there was no wrapping by that DW_TAG_lexical_block.
13873 GCC does no longer produces such DWARF since GCC r224161. */
13874 for (child_die
= die
->child
;
13875 child_die
!= NULL
&& child_die
->tag
;
13876 child_die
= sibling_die (child_die
))
13877 process_die (child_die
, cu
);
13879 case PC_BOUNDS_INVALID
:
13882 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13883 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13885 push_context (0, lowpc
);
13886 if (die
->child
!= NULL
)
13888 child_die
= die
->child
;
13889 while (child_die
&& child_die
->tag
)
13891 process_die (child_die
, cu
);
13892 child_die
= sibling_die (child_die
);
13895 inherit_abstract_dies (die
, cu
);
13896 newobj
= pop_context ();
13898 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13900 struct block
*block
13901 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13902 newobj
->start_addr
, highpc
);
13904 /* Note that recording ranges after traversing children, as we
13905 do here, means that recording a parent's ranges entails
13906 walking across all its children's ranges as they appear in
13907 the address map, which is quadratic behavior.
13909 It would be nicer to record the parent's ranges before
13910 traversing its children, simply overriding whatever you find
13911 there. But since we don't even decide whether to create a
13912 block until after we've traversed its children, that's hard
13914 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13916 local_symbols
= newobj
->locals
;
13917 local_using_directives
= newobj
->local_using_directives
;
13920 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13923 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13925 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13926 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13927 CORE_ADDR pc
, baseaddr
;
13928 struct attribute
*attr
;
13929 struct call_site
*call_site
, call_site_local
;
13932 struct die_info
*child_die
;
13934 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13936 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13939 /* This was a pre-DWARF-5 GNU extension alias
13940 for DW_AT_call_return_pc. */
13941 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13945 complaint (&symfile_complaints
,
13946 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
13947 "DIE %s [in module %s]"),
13948 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13951 pc
= attr_value_as_address (attr
) + baseaddr
;
13952 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13954 if (cu
->call_site_htab
== NULL
)
13955 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13956 NULL
, &objfile
->objfile_obstack
,
13957 hashtab_obstack_allocate
, NULL
);
13958 call_site_local
.pc
= pc
;
13959 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13962 complaint (&symfile_complaints
,
13963 _("Duplicate PC %s for DW_TAG_call_site "
13964 "DIE %s [in module %s]"),
13965 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13966 objfile_name (objfile
));
13970 /* Count parameters at the caller. */
13973 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13974 child_die
= sibling_die (child_die
))
13976 if (child_die
->tag
!= DW_TAG_call_site_parameter
13977 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13979 complaint (&symfile_complaints
,
13980 _("Tag %d is not DW_TAG_call_site_parameter in "
13981 "DW_TAG_call_site child DIE %s [in module %s]"),
13982 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13983 objfile_name (objfile
));
13991 = ((struct call_site
*)
13992 obstack_alloc (&objfile
->objfile_obstack
,
13993 sizeof (*call_site
)
13994 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13996 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13997 call_site
->pc
= pc
;
13999 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14000 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14002 struct die_info
*func_die
;
14004 /* Skip also over DW_TAG_inlined_subroutine. */
14005 for (func_die
= die
->parent
;
14006 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14007 && func_die
->tag
!= DW_TAG_subroutine_type
;
14008 func_die
= func_die
->parent
);
14010 /* DW_AT_call_all_calls is a superset
14011 of DW_AT_call_all_tail_calls. */
14013 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14014 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14015 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14016 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14018 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14019 not complete. But keep CALL_SITE for look ups via call_site_htab,
14020 both the initial caller containing the real return address PC and
14021 the final callee containing the current PC of a chain of tail
14022 calls do not need to have the tail call list complete. But any
14023 function candidate for a virtual tail call frame searched via
14024 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14025 determined unambiguously. */
14029 struct type
*func_type
= NULL
;
14032 func_type
= get_die_type (func_die
, cu
);
14033 if (func_type
!= NULL
)
14035 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14037 /* Enlist this call site to the function. */
14038 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14039 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14042 complaint (&symfile_complaints
,
14043 _("Cannot find function owning DW_TAG_call_site "
14044 "DIE %s [in module %s]"),
14045 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14049 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14051 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14053 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14056 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14057 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14059 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14060 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14061 /* Keep NULL DWARF_BLOCK. */;
14062 else if (attr_form_is_block (attr
))
14064 struct dwarf2_locexpr_baton
*dlbaton
;
14066 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14067 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14068 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14069 dlbaton
->per_cu
= cu
->per_cu
;
14071 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14073 else if (attr_form_is_ref (attr
))
14075 struct dwarf2_cu
*target_cu
= cu
;
14076 struct die_info
*target_die
;
14078 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14079 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14080 if (die_is_declaration (target_die
, target_cu
))
14082 const char *target_physname
;
14084 /* Prefer the mangled name; otherwise compute the demangled one. */
14085 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14086 if (target_physname
== NULL
)
14087 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14088 if (target_physname
== NULL
)
14089 complaint (&symfile_complaints
,
14090 _("DW_AT_call_target target DIE has invalid "
14091 "physname, for referencing DIE %s [in module %s]"),
14092 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14094 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14100 /* DW_AT_entry_pc should be preferred. */
14101 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14102 <= PC_BOUNDS_INVALID
)
14103 complaint (&symfile_complaints
,
14104 _("DW_AT_call_target target DIE has invalid "
14105 "low pc, for referencing DIE %s [in module %s]"),
14106 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14109 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14110 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14115 complaint (&symfile_complaints
,
14116 _("DW_TAG_call_site DW_AT_call_target is neither "
14117 "block nor reference, for DIE %s [in module %s]"),
14118 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14120 call_site
->per_cu
= cu
->per_cu
;
14122 for (child_die
= die
->child
;
14123 child_die
&& child_die
->tag
;
14124 child_die
= sibling_die (child_die
))
14126 struct call_site_parameter
*parameter
;
14127 struct attribute
*loc
, *origin
;
14129 if (child_die
->tag
!= DW_TAG_call_site_parameter
14130 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14132 /* Already printed the complaint above. */
14136 gdb_assert (call_site
->parameter_count
< nparams
);
14137 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14139 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14140 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14141 register is contained in DW_AT_call_value. */
14143 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14144 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14145 if (origin
== NULL
)
14147 /* This was a pre-DWARF-5 GNU extension alias
14148 for DW_AT_call_parameter. */
14149 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14151 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14153 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14155 sect_offset sect_off
14156 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14157 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14159 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14160 binding can be done only inside one CU. Such referenced DIE
14161 therefore cannot be even moved to DW_TAG_partial_unit. */
14162 complaint (&symfile_complaints
,
14163 _("DW_AT_call_parameter offset is not in CU for "
14164 "DW_TAG_call_site child DIE %s [in module %s]"),
14165 sect_offset_str (child_die
->sect_off
),
14166 objfile_name (objfile
));
14169 parameter
->u
.param_cu_off
14170 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14172 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14174 complaint (&symfile_complaints
,
14175 _("No DW_FORM_block* DW_AT_location for "
14176 "DW_TAG_call_site child DIE %s [in module %s]"),
14177 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14182 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14183 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14184 if (parameter
->u
.dwarf_reg
!= -1)
14185 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14186 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14187 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14188 ¶meter
->u
.fb_offset
))
14189 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14192 complaint (&symfile_complaints
,
14193 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14194 "for DW_FORM_block* DW_AT_location is supported for "
14195 "DW_TAG_call_site child DIE %s "
14197 sect_offset_str (child_die
->sect_off
),
14198 objfile_name (objfile
));
14203 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14205 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14206 if (!attr_form_is_block (attr
))
14208 complaint (&symfile_complaints
,
14209 _("No DW_FORM_block* DW_AT_call_value for "
14210 "DW_TAG_call_site child DIE %s [in module %s]"),
14211 sect_offset_str (child_die
->sect_off
),
14212 objfile_name (objfile
));
14215 parameter
->value
= DW_BLOCK (attr
)->data
;
14216 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14218 /* Parameters are not pre-cleared by memset above. */
14219 parameter
->data_value
= NULL
;
14220 parameter
->data_value_size
= 0;
14221 call_site
->parameter_count
++;
14223 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14225 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14228 if (!attr_form_is_block (attr
))
14229 complaint (&symfile_complaints
,
14230 _("No DW_FORM_block* DW_AT_call_data_value for "
14231 "DW_TAG_call_site child DIE %s [in module %s]"),
14232 sect_offset_str (child_die
->sect_off
),
14233 objfile_name (objfile
));
14236 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14237 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14243 /* Helper function for read_variable. If DIE represents a virtual
14244 table, then return the type of the concrete object that is
14245 associated with the virtual table. Otherwise, return NULL. */
14247 static struct type
*
14248 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14250 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14254 /* Find the type DIE. */
14255 struct die_info
*type_die
= NULL
;
14256 struct dwarf2_cu
*type_cu
= cu
;
14258 if (attr_form_is_ref (attr
))
14259 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14260 if (type_die
== NULL
)
14263 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14265 return die_containing_type (type_die
, type_cu
);
14268 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14271 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14273 struct rust_vtable_symbol
*storage
= NULL
;
14275 if (cu
->language
== language_rust
)
14277 struct type
*containing_type
= rust_containing_type (die
, cu
);
14279 if (containing_type
!= NULL
)
14281 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14283 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14284 struct rust_vtable_symbol
);
14285 initialize_objfile_symbol (storage
);
14286 storage
->concrete_type
= containing_type
;
14287 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14291 new_symbol (die
, NULL
, cu
, storage
);
14294 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14295 reading .debug_rnglists.
14296 Callback's type should be:
14297 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14298 Return true if the attributes are present and valid, otherwise,
14301 template <typename Callback
>
14303 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14304 Callback
&&callback
)
14306 struct dwarf2_per_objfile
*dwarf2_per_objfile
14307 = cu
->per_cu
->dwarf2_per_objfile
;
14308 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14309 bfd
*obfd
= objfile
->obfd
;
14310 /* Base address selection entry. */
14313 const gdb_byte
*buffer
;
14314 CORE_ADDR baseaddr
;
14315 bool overflow
= false;
14317 found_base
= cu
->base_known
;
14318 base
= cu
->base_address
;
14320 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14321 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14323 complaint (&symfile_complaints
,
14324 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14328 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14330 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14334 /* Initialize it due to a false compiler warning. */
14335 CORE_ADDR range_beginning
= 0, range_end
= 0;
14336 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14337 + dwarf2_per_objfile
->rnglists
.size
);
14338 unsigned int bytes_read
;
14340 if (buffer
== buf_end
)
14345 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14348 case DW_RLE_end_of_list
:
14350 case DW_RLE_base_address
:
14351 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14356 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14358 buffer
+= bytes_read
;
14360 case DW_RLE_start_length
:
14361 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14366 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14367 buffer
+= bytes_read
;
14368 range_end
= (range_beginning
14369 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14370 buffer
+= bytes_read
;
14371 if (buffer
> buf_end
)
14377 case DW_RLE_offset_pair
:
14378 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14379 buffer
+= bytes_read
;
14380 if (buffer
> buf_end
)
14385 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14386 buffer
+= bytes_read
;
14387 if (buffer
> buf_end
)
14393 case DW_RLE_start_end
:
14394 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14399 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14400 buffer
+= bytes_read
;
14401 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14402 buffer
+= bytes_read
;
14405 complaint (&symfile_complaints
,
14406 _("Invalid .debug_rnglists data (no base address)"));
14409 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14411 if (rlet
== DW_RLE_base_address
)
14416 /* We have no valid base address for the ranges
14418 complaint (&symfile_complaints
,
14419 _("Invalid .debug_rnglists data (no base address)"));
14423 if (range_beginning
> range_end
)
14425 /* Inverted range entries are invalid. */
14426 complaint (&symfile_complaints
,
14427 _("Invalid .debug_rnglists data (inverted range)"));
14431 /* Empty range entries have no effect. */
14432 if (range_beginning
== range_end
)
14435 range_beginning
+= base
;
14438 /* A not-uncommon case of bad debug info.
14439 Don't pollute the addrmap with bad data. */
14440 if (range_beginning
+ baseaddr
== 0
14441 && !dwarf2_per_objfile
->has_section_at_zero
)
14443 complaint (&symfile_complaints
,
14444 _(".debug_rnglists entry has start address of zero"
14445 " [in module %s]"), objfile_name (objfile
));
14449 callback (range_beginning
, range_end
);
14454 complaint (&symfile_complaints
,
14455 _("Offset %d is not terminated "
14456 "for DW_AT_ranges attribute"),
14464 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14465 Callback's type should be:
14466 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14467 Return 1 if the attributes are present and valid, otherwise, return 0. */
14469 template <typename Callback
>
14471 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14472 Callback
&&callback
)
14474 struct dwarf2_per_objfile
*dwarf2_per_objfile
14475 = cu
->per_cu
->dwarf2_per_objfile
;
14476 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14477 struct comp_unit_head
*cu_header
= &cu
->header
;
14478 bfd
*obfd
= objfile
->obfd
;
14479 unsigned int addr_size
= cu_header
->addr_size
;
14480 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14481 /* Base address selection entry. */
14484 unsigned int dummy
;
14485 const gdb_byte
*buffer
;
14486 CORE_ADDR baseaddr
;
14488 if (cu_header
->version
>= 5)
14489 return dwarf2_rnglists_process (offset
, cu
, callback
);
14491 found_base
= cu
->base_known
;
14492 base
= cu
->base_address
;
14494 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14495 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14497 complaint (&symfile_complaints
,
14498 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14502 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14504 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14508 CORE_ADDR range_beginning
, range_end
;
14510 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14511 buffer
+= addr_size
;
14512 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14513 buffer
+= addr_size
;
14514 offset
+= 2 * addr_size
;
14516 /* An end of list marker is a pair of zero addresses. */
14517 if (range_beginning
== 0 && range_end
== 0)
14518 /* Found the end of list entry. */
14521 /* Each base address selection entry is a pair of 2 values.
14522 The first is the largest possible address, the second is
14523 the base address. Check for a base address here. */
14524 if ((range_beginning
& mask
) == mask
)
14526 /* If we found the largest possible address, then we already
14527 have the base address in range_end. */
14535 /* We have no valid base address for the ranges
14537 complaint (&symfile_complaints
,
14538 _("Invalid .debug_ranges data (no base address)"));
14542 if (range_beginning
> range_end
)
14544 /* Inverted range entries are invalid. */
14545 complaint (&symfile_complaints
,
14546 _("Invalid .debug_ranges data (inverted range)"));
14550 /* Empty range entries have no effect. */
14551 if (range_beginning
== range_end
)
14554 range_beginning
+= base
;
14557 /* A not-uncommon case of bad debug info.
14558 Don't pollute the addrmap with bad data. */
14559 if (range_beginning
+ baseaddr
== 0
14560 && !dwarf2_per_objfile
->has_section_at_zero
)
14562 complaint (&symfile_complaints
,
14563 _(".debug_ranges entry has start address of zero"
14564 " [in module %s]"), objfile_name (objfile
));
14568 callback (range_beginning
, range_end
);
14574 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14575 Return 1 if the attributes are present and valid, otherwise, return 0.
14576 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14579 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14580 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14581 struct partial_symtab
*ranges_pst
)
14583 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14584 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14585 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14586 SECT_OFF_TEXT (objfile
));
14589 CORE_ADDR high
= 0;
14592 retval
= dwarf2_ranges_process (offset
, cu
,
14593 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14595 if (ranges_pst
!= NULL
)
14600 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14601 range_beginning
+ baseaddr
);
14602 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14603 range_end
+ baseaddr
);
14604 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14608 /* FIXME: This is recording everything as a low-high
14609 segment of consecutive addresses. We should have a
14610 data structure for discontiguous block ranges
14614 low
= range_beginning
;
14620 if (range_beginning
< low
)
14621 low
= range_beginning
;
14622 if (range_end
> high
)
14630 /* If the first entry is an end-of-list marker, the range
14631 describes an empty scope, i.e. no instructions. */
14637 *high_return
= high
;
14641 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14642 definition for the return value. *LOWPC and *HIGHPC are set iff
14643 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14645 static enum pc_bounds_kind
14646 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14647 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14648 struct partial_symtab
*pst
)
14650 struct dwarf2_per_objfile
*dwarf2_per_objfile
14651 = cu
->per_cu
->dwarf2_per_objfile
;
14652 struct attribute
*attr
;
14653 struct attribute
*attr_high
;
14655 CORE_ADDR high
= 0;
14656 enum pc_bounds_kind ret
;
14658 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14661 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14664 low
= attr_value_as_address (attr
);
14665 high
= attr_value_as_address (attr_high
);
14666 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14670 /* Found high w/o low attribute. */
14671 return PC_BOUNDS_INVALID
;
14673 /* Found consecutive range of addresses. */
14674 ret
= PC_BOUNDS_HIGH_LOW
;
14678 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14681 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14682 We take advantage of the fact that DW_AT_ranges does not appear
14683 in DW_TAG_compile_unit of DWO files. */
14684 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14685 unsigned int ranges_offset
= (DW_UNSND (attr
)
14686 + (need_ranges_base
14690 /* Value of the DW_AT_ranges attribute is the offset in the
14691 .debug_ranges section. */
14692 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14693 return PC_BOUNDS_INVALID
;
14694 /* Found discontinuous range of addresses. */
14695 ret
= PC_BOUNDS_RANGES
;
14698 return PC_BOUNDS_NOT_PRESENT
;
14701 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14703 return PC_BOUNDS_INVALID
;
14705 /* When using the GNU linker, .gnu.linkonce. sections are used to
14706 eliminate duplicate copies of functions and vtables and such.
14707 The linker will arbitrarily choose one and discard the others.
14708 The AT_*_pc values for such functions refer to local labels in
14709 these sections. If the section from that file was discarded, the
14710 labels are not in the output, so the relocs get a value of 0.
14711 If this is a discarded function, mark the pc bounds as invalid,
14712 so that GDB will ignore it. */
14713 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14714 return PC_BOUNDS_INVALID
;
14722 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14723 its low and high PC addresses. Do nothing if these addresses could not
14724 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14725 and HIGHPC to the high address if greater than HIGHPC. */
14728 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14729 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14730 struct dwarf2_cu
*cu
)
14732 CORE_ADDR low
, high
;
14733 struct die_info
*child
= die
->child
;
14735 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14737 *lowpc
= std::min (*lowpc
, low
);
14738 *highpc
= std::max (*highpc
, high
);
14741 /* If the language does not allow nested subprograms (either inside
14742 subprograms or lexical blocks), we're done. */
14743 if (cu
->language
!= language_ada
)
14746 /* Check all the children of the given DIE. If it contains nested
14747 subprograms, then check their pc bounds. Likewise, we need to
14748 check lexical blocks as well, as they may also contain subprogram
14750 while (child
&& child
->tag
)
14752 if (child
->tag
== DW_TAG_subprogram
14753 || child
->tag
== DW_TAG_lexical_block
)
14754 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14755 child
= sibling_die (child
);
14759 /* Get the low and high pc's represented by the scope DIE, and store
14760 them in *LOWPC and *HIGHPC. If the correct values can't be
14761 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14764 get_scope_pc_bounds (struct die_info
*die
,
14765 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14766 struct dwarf2_cu
*cu
)
14768 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14769 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14770 CORE_ADDR current_low
, current_high
;
14772 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14773 >= PC_BOUNDS_RANGES
)
14775 best_low
= current_low
;
14776 best_high
= current_high
;
14780 struct die_info
*child
= die
->child
;
14782 while (child
&& child
->tag
)
14784 switch (child
->tag
) {
14785 case DW_TAG_subprogram
:
14786 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14788 case DW_TAG_namespace
:
14789 case DW_TAG_module
:
14790 /* FIXME: carlton/2004-01-16: Should we do this for
14791 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14792 that current GCC's always emit the DIEs corresponding
14793 to definitions of methods of classes as children of a
14794 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14795 the DIEs giving the declarations, which could be
14796 anywhere). But I don't see any reason why the
14797 standards says that they have to be there. */
14798 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14800 if (current_low
!= ((CORE_ADDR
) -1))
14802 best_low
= std::min (best_low
, current_low
);
14803 best_high
= std::max (best_high
, current_high
);
14811 child
= sibling_die (child
);
14816 *highpc
= best_high
;
14819 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14823 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14824 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14826 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14827 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14828 struct attribute
*attr
;
14829 struct attribute
*attr_high
;
14831 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14834 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14837 CORE_ADDR low
= attr_value_as_address (attr
);
14838 CORE_ADDR high
= attr_value_as_address (attr_high
);
14840 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14843 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14844 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14845 record_block_range (block
, low
, high
- 1);
14849 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14852 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14853 We take advantage of the fact that DW_AT_ranges does not appear
14854 in DW_TAG_compile_unit of DWO files. */
14855 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14857 /* The value of the DW_AT_ranges attribute is the offset of the
14858 address range list in the .debug_ranges section. */
14859 unsigned long offset
= (DW_UNSND (attr
)
14860 + (need_ranges_base
? cu
->ranges_base
: 0));
14862 dwarf2_ranges_process (offset
, cu
,
14863 [&] (CORE_ADDR start
, CORE_ADDR end
)
14867 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14868 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14869 record_block_range (block
, start
, end
- 1);
14874 /* Check whether the producer field indicates either of GCC < 4.6, or the
14875 Intel C/C++ compiler, and cache the result in CU. */
14878 check_producer (struct dwarf2_cu
*cu
)
14882 if (cu
->producer
== NULL
)
14884 /* For unknown compilers expect their behavior is DWARF version
14887 GCC started to support .debug_types sections by -gdwarf-4 since
14888 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14889 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14890 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14891 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14893 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14895 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14896 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14898 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14899 cu
->producer_is_icc_lt_14
= major
< 14;
14902 /* For other non-GCC compilers, expect their behavior is DWARF version
14906 cu
->checked_producer
= 1;
14909 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14910 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14911 during 4.6.0 experimental. */
14914 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14916 if (!cu
->checked_producer
)
14917 check_producer (cu
);
14919 return cu
->producer_is_gxx_lt_4_6
;
14922 /* Return the default accessibility type if it is not overriden by
14923 DW_AT_accessibility. */
14925 static enum dwarf_access_attribute
14926 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14928 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14930 /* The default DWARF 2 accessibility for members is public, the default
14931 accessibility for inheritance is private. */
14933 if (die
->tag
!= DW_TAG_inheritance
)
14934 return DW_ACCESS_public
;
14936 return DW_ACCESS_private
;
14940 /* DWARF 3+ defines the default accessibility a different way. The same
14941 rules apply now for DW_TAG_inheritance as for the members and it only
14942 depends on the container kind. */
14944 if (die
->parent
->tag
== DW_TAG_class_type
)
14945 return DW_ACCESS_private
;
14947 return DW_ACCESS_public
;
14951 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14952 offset. If the attribute was not found return 0, otherwise return
14953 1. If it was found but could not properly be handled, set *OFFSET
14957 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14960 struct attribute
*attr
;
14962 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14967 /* Note that we do not check for a section offset first here.
14968 This is because DW_AT_data_member_location is new in DWARF 4,
14969 so if we see it, we can assume that a constant form is really
14970 a constant and not a section offset. */
14971 if (attr_form_is_constant (attr
))
14972 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14973 else if (attr_form_is_section_offset (attr
))
14974 dwarf2_complex_location_expr_complaint ();
14975 else if (attr_form_is_block (attr
))
14976 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14978 dwarf2_complex_location_expr_complaint ();
14986 /* Add an aggregate field to the field list. */
14989 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14990 struct dwarf2_cu
*cu
)
14992 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14993 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14994 struct nextfield
*new_field
;
14995 struct attribute
*attr
;
14997 const char *fieldname
= "";
14999 if (die
->tag
== DW_TAG_inheritance
)
15001 fip
->baseclasses
.emplace_back ();
15002 new_field
= &fip
->baseclasses
.back ();
15006 fip
->fields
.emplace_back ();
15007 new_field
= &fip
->fields
.back ();
15012 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15014 new_field
->accessibility
= DW_UNSND (attr
);
15016 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15017 if (new_field
->accessibility
!= DW_ACCESS_public
)
15018 fip
->non_public_fields
= 1;
15020 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15022 new_field
->virtuality
= DW_UNSND (attr
);
15024 new_field
->virtuality
= DW_VIRTUALITY_none
;
15026 fp
= &new_field
->field
;
15028 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15032 /* Data member other than a C++ static data member. */
15034 /* Get type of field. */
15035 fp
->type
= die_type (die
, cu
);
15037 SET_FIELD_BITPOS (*fp
, 0);
15039 /* Get bit size of field (zero if none). */
15040 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15043 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15047 FIELD_BITSIZE (*fp
) = 0;
15050 /* Get bit offset of field. */
15051 if (handle_data_member_location (die
, cu
, &offset
))
15052 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15053 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15056 if (gdbarch_bits_big_endian (gdbarch
))
15058 /* For big endian bits, the DW_AT_bit_offset gives the
15059 additional bit offset from the MSB of the containing
15060 anonymous object to the MSB of the field. We don't
15061 have to do anything special since we don't need to
15062 know the size of the anonymous object. */
15063 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15067 /* For little endian bits, compute the bit offset to the
15068 MSB of the anonymous object, subtract off the number of
15069 bits from the MSB of the field to the MSB of the
15070 object, and then subtract off the number of bits of
15071 the field itself. The result is the bit offset of
15072 the LSB of the field. */
15073 int anonymous_size
;
15074 int bit_offset
= DW_UNSND (attr
);
15076 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15079 /* The size of the anonymous object containing
15080 the bit field is explicit, so use the
15081 indicated size (in bytes). */
15082 anonymous_size
= DW_UNSND (attr
);
15086 /* The size of the anonymous object containing
15087 the bit field must be inferred from the type
15088 attribute of the data member containing the
15090 anonymous_size
= TYPE_LENGTH (fp
->type
);
15092 SET_FIELD_BITPOS (*fp
,
15093 (FIELD_BITPOS (*fp
)
15094 + anonymous_size
* bits_per_byte
15095 - bit_offset
- FIELD_BITSIZE (*fp
)));
15098 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15100 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15101 + dwarf2_get_attr_constant_value (attr
, 0)));
15103 /* Get name of field. */
15104 fieldname
= dwarf2_name (die
, cu
);
15105 if (fieldname
== NULL
)
15108 /* The name is already allocated along with this objfile, so we don't
15109 need to duplicate it for the type. */
15110 fp
->name
= fieldname
;
15112 /* Change accessibility for artificial fields (e.g. virtual table
15113 pointer or virtual base class pointer) to private. */
15114 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15116 FIELD_ARTIFICIAL (*fp
) = 1;
15117 new_field
->accessibility
= DW_ACCESS_private
;
15118 fip
->non_public_fields
= 1;
15121 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15123 /* C++ static member. */
15125 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15126 is a declaration, but all versions of G++ as of this writing
15127 (so through at least 3.2.1) incorrectly generate
15128 DW_TAG_variable tags. */
15130 const char *physname
;
15132 /* Get name of field. */
15133 fieldname
= dwarf2_name (die
, cu
);
15134 if (fieldname
== NULL
)
15137 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15139 /* Only create a symbol if this is an external value.
15140 new_symbol checks this and puts the value in the global symbol
15141 table, which we want. If it is not external, new_symbol
15142 will try to put the value in cu->list_in_scope which is wrong. */
15143 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15145 /* A static const member, not much different than an enum as far as
15146 we're concerned, except that we can support more types. */
15147 new_symbol (die
, NULL
, cu
);
15150 /* Get physical name. */
15151 physname
= dwarf2_physname (fieldname
, die
, cu
);
15153 /* The name is already allocated along with this objfile, so we don't
15154 need to duplicate it for the type. */
15155 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15156 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15157 FIELD_NAME (*fp
) = fieldname
;
15159 else if (die
->tag
== DW_TAG_inheritance
)
15163 /* C++ base class field. */
15164 if (handle_data_member_location (die
, cu
, &offset
))
15165 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15166 FIELD_BITSIZE (*fp
) = 0;
15167 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15168 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15170 else if (die
->tag
== DW_TAG_variant_part
)
15172 /* process_structure_scope will treat this DIE as a union. */
15173 process_structure_scope (die
, cu
);
15175 /* The variant part is relative to the start of the enclosing
15177 SET_FIELD_BITPOS (*fp
, 0);
15178 fp
->type
= get_die_type (die
, cu
);
15179 fp
->artificial
= 1;
15180 fp
->name
= "<<variant>>";
15183 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15186 /* Can the type given by DIE define another type? */
15189 type_can_define_types (const struct die_info
*die
)
15193 case DW_TAG_typedef
:
15194 case DW_TAG_class_type
:
15195 case DW_TAG_structure_type
:
15196 case DW_TAG_union_type
:
15197 case DW_TAG_enumeration_type
:
15205 /* Add a type definition defined in the scope of the FIP's class. */
15208 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15209 struct dwarf2_cu
*cu
)
15211 struct decl_field fp
;
15212 memset (&fp
, 0, sizeof (fp
));
15214 gdb_assert (type_can_define_types (die
));
15216 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15217 fp
.name
= dwarf2_name (die
, cu
);
15218 fp
.type
= read_type_die (die
, cu
);
15220 /* Save accessibility. */
15221 enum dwarf_access_attribute accessibility
;
15222 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15224 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15226 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15227 switch (accessibility
)
15229 case DW_ACCESS_public
:
15230 /* The assumed value if neither private nor protected. */
15232 case DW_ACCESS_private
:
15235 case DW_ACCESS_protected
:
15236 fp
.is_protected
= 1;
15239 complaint (&symfile_complaints
,
15240 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15243 if (die
->tag
== DW_TAG_typedef
)
15244 fip
->typedef_field_list
.push_back (fp
);
15246 fip
->nested_types_list
.push_back (fp
);
15249 /* Create the vector of fields, and attach it to the type. */
15252 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15253 struct dwarf2_cu
*cu
)
15255 int nfields
= fip
->nfields
;
15257 /* Record the field count, allocate space for the array of fields,
15258 and create blank accessibility bitfields if necessary. */
15259 TYPE_NFIELDS (type
) = nfields
;
15260 TYPE_FIELDS (type
) = (struct field
*)
15261 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15263 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15265 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15267 TYPE_FIELD_PRIVATE_BITS (type
) =
15268 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15269 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15271 TYPE_FIELD_PROTECTED_BITS (type
) =
15272 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15273 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15275 TYPE_FIELD_IGNORE_BITS (type
) =
15276 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15277 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15280 /* If the type has baseclasses, allocate and clear a bit vector for
15281 TYPE_FIELD_VIRTUAL_BITS. */
15282 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15284 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15285 unsigned char *pointer
;
15287 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15288 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15289 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15290 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15291 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15294 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15296 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15298 for (int index
= 0; index
< nfields
; ++index
)
15300 struct nextfield
&field
= fip
->fields
[index
];
15302 if (field
.variant
.is_discriminant
)
15303 di
->discriminant_index
= index
;
15304 else if (field
.variant
.default_branch
)
15305 di
->default_index
= index
;
15307 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15311 /* Copy the saved-up fields into the field vector. */
15312 for (int i
= 0; i
< nfields
; ++i
)
15314 struct nextfield
&field
15315 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15316 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15318 TYPE_FIELD (type
, i
) = field
.field
;
15319 switch (field
.accessibility
)
15321 case DW_ACCESS_private
:
15322 if (cu
->language
!= language_ada
)
15323 SET_TYPE_FIELD_PRIVATE (type
, i
);
15326 case DW_ACCESS_protected
:
15327 if (cu
->language
!= language_ada
)
15328 SET_TYPE_FIELD_PROTECTED (type
, i
);
15331 case DW_ACCESS_public
:
15335 /* Unknown accessibility. Complain and treat it as public. */
15337 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15338 field
.accessibility
);
15342 if (i
< fip
->baseclasses
.size ())
15344 switch (field
.virtuality
)
15346 case DW_VIRTUALITY_virtual
:
15347 case DW_VIRTUALITY_pure_virtual
:
15348 if (cu
->language
== language_ada
)
15349 error (_("unexpected virtuality in component of Ada type"));
15350 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15357 /* Return true if this member function is a constructor, false
15361 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15363 const char *fieldname
;
15364 const char *type_name
;
15367 if (die
->parent
== NULL
)
15370 if (die
->parent
->tag
!= DW_TAG_structure_type
15371 && die
->parent
->tag
!= DW_TAG_union_type
15372 && die
->parent
->tag
!= DW_TAG_class_type
)
15375 fieldname
= dwarf2_name (die
, cu
);
15376 type_name
= dwarf2_name (die
->parent
, cu
);
15377 if (fieldname
== NULL
|| type_name
== NULL
)
15380 len
= strlen (fieldname
);
15381 return (strncmp (fieldname
, type_name
, len
) == 0
15382 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15385 /* Add a member function to the proper fieldlist. */
15388 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15389 struct type
*type
, struct dwarf2_cu
*cu
)
15391 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15392 struct attribute
*attr
;
15394 struct fnfieldlist
*flp
= nullptr;
15395 struct fn_field
*fnp
;
15396 const char *fieldname
;
15397 struct type
*this_type
;
15398 enum dwarf_access_attribute accessibility
;
15400 if (cu
->language
== language_ada
)
15401 error (_("unexpected member function in Ada type"));
15403 /* Get name of member function. */
15404 fieldname
= dwarf2_name (die
, cu
);
15405 if (fieldname
== NULL
)
15408 /* Look up member function name in fieldlist. */
15409 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15411 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15413 flp
= &fip
->fnfieldlists
[i
];
15418 /* Create a new fnfieldlist if necessary. */
15419 if (flp
== nullptr)
15421 fip
->fnfieldlists
.emplace_back ();
15422 flp
= &fip
->fnfieldlists
.back ();
15423 flp
->name
= fieldname
;
15424 i
= fip
->fnfieldlists
.size () - 1;
15427 /* Create a new member function field and add it to the vector of
15429 flp
->fnfields
.emplace_back ();
15430 fnp
= &flp
->fnfields
.back ();
15432 /* Delay processing of the physname until later. */
15433 if (cu
->language
== language_cplus
)
15434 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15438 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15439 fnp
->physname
= physname
? physname
: "";
15442 fnp
->type
= alloc_type (objfile
);
15443 this_type
= read_type_die (die
, cu
);
15444 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15446 int nparams
= TYPE_NFIELDS (this_type
);
15448 /* TYPE is the domain of this method, and THIS_TYPE is the type
15449 of the method itself (TYPE_CODE_METHOD). */
15450 smash_to_method_type (fnp
->type
, type
,
15451 TYPE_TARGET_TYPE (this_type
),
15452 TYPE_FIELDS (this_type
),
15453 TYPE_NFIELDS (this_type
),
15454 TYPE_VARARGS (this_type
));
15456 /* Handle static member functions.
15457 Dwarf2 has no clean way to discern C++ static and non-static
15458 member functions. G++ helps GDB by marking the first
15459 parameter for non-static member functions (which is the this
15460 pointer) as artificial. We obtain this information from
15461 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15462 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15463 fnp
->voffset
= VOFFSET_STATIC
;
15466 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15467 dwarf2_full_name (fieldname
, die
, cu
));
15469 /* Get fcontext from DW_AT_containing_type if present. */
15470 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15471 fnp
->fcontext
= die_containing_type (die
, cu
);
15473 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15474 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15476 /* Get accessibility. */
15477 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15479 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15481 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15482 switch (accessibility
)
15484 case DW_ACCESS_private
:
15485 fnp
->is_private
= 1;
15487 case DW_ACCESS_protected
:
15488 fnp
->is_protected
= 1;
15492 /* Check for artificial methods. */
15493 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15494 if (attr
&& DW_UNSND (attr
) != 0)
15495 fnp
->is_artificial
= 1;
15497 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15499 /* Get index in virtual function table if it is a virtual member
15500 function. For older versions of GCC, this is an offset in the
15501 appropriate virtual table, as specified by DW_AT_containing_type.
15502 For everyone else, it is an expression to be evaluated relative
15503 to the object address. */
15505 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15508 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15510 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15512 /* Old-style GCC. */
15513 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15515 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15516 || (DW_BLOCK (attr
)->size
> 1
15517 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15518 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15520 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15521 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15522 dwarf2_complex_location_expr_complaint ();
15524 fnp
->voffset
/= cu
->header
.addr_size
;
15528 dwarf2_complex_location_expr_complaint ();
15530 if (!fnp
->fcontext
)
15532 /* If there is no `this' field and no DW_AT_containing_type,
15533 we cannot actually find a base class context for the
15535 if (TYPE_NFIELDS (this_type
) == 0
15536 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15538 complaint (&symfile_complaints
,
15539 _("cannot determine context for virtual member "
15540 "function \"%s\" (offset %s)"),
15541 fieldname
, sect_offset_str (die
->sect_off
));
15546 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15550 else if (attr_form_is_section_offset (attr
))
15552 dwarf2_complex_location_expr_complaint ();
15556 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15562 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15563 if (attr
&& DW_UNSND (attr
))
15565 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15566 complaint (&symfile_complaints
,
15567 _("Member function \"%s\" (offset %s) is virtual "
15568 "but the vtable offset is not specified"),
15569 fieldname
, sect_offset_str (die
->sect_off
));
15570 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15571 TYPE_CPLUS_DYNAMIC (type
) = 1;
15576 /* Create the vector of member function fields, and attach it to the type. */
15579 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15580 struct dwarf2_cu
*cu
)
15582 if (cu
->language
== language_ada
)
15583 error (_("unexpected member functions in Ada type"));
15585 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15586 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15588 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15590 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15592 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15593 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15595 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15596 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15597 fn_flp
->fn_fields
= (struct fn_field
*)
15598 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15600 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15601 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15604 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15607 /* Returns non-zero if NAME is the name of a vtable member in CU's
15608 language, zero otherwise. */
15610 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15612 static const char vptr
[] = "_vptr";
15614 /* Look for the C++ form of the vtable. */
15615 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15621 /* GCC outputs unnamed structures that are really pointers to member
15622 functions, with the ABI-specified layout. If TYPE describes
15623 such a structure, smash it into a member function type.
15625 GCC shouldn't do this; it should just output pointer to member DIEs.
15626 This is GCC PR debug/28767. */
15629 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15631 struct type
*pfn_type
, *self_type
, *new_type
;
15633 /* Check for a structure with no name and two children. */
15634 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15637 /* Check for __pfn and __delta members. */
15638 if (TYPE_FIELD_NAME (type
, 0) == NULL
15639 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15640 || TYPE_FIELD_NAME (type
, 1) == NULL
15641 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15644 /* Find the type of the method. */
15645 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15646 if (pfn_type
== NULL
15647 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15648 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15651 /* Look for the "this" argument. */
15652 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15653 if (TYPE_NFIELDS (pfn_type
) == 0
15654 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15655 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15658 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15659 new_type
= alloc_type (objfile
);
15660 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15661 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15662 TYPE_VARARGS (pfn_type
));
15663 smash_to_methodptr_type (type
, new_type
);
15667 /* Called when we find the DIE that starts a structure or union scope
15668 (definition) to create a type for the structure or union. Fill in
15669 the type's name and general properties; the members will not be
15670 processed until process_structure_scope. A symbol table entry for
15671 the type will also not be done until process_structure_scope (assuming
15672 the type has a name).
15674 NOTE: we need to call these functions regardless of whether or not the
15675 DIE has a DW_AT_name attribute, since it might be an anonymous
15676 structure or union. This gets the type entered into our set of
15677 user defined types. */
15679 static struct type
*
15680 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15682 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15684 struct attribute
*attr
;
15687 /* If the definition of this type lives in .debug_types, read that type.
15688 Don't follow DW_AT_specification though, that will take us back up
15689 the chain and we want to go down. */
15690 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15693 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15695 /* The type's CU may not be the same as CU.
15696 Ensure TYPE is recorded with CU in die_type_hash. */
15697 return set_die_type (die
, type
, cu
);
15700 type
= alloc_type (objfile
);
15701 INIT_CPLUS_SPECIFIC (type
);
15703 name
= dwarf2_name (die
, cu
);
15706 if (cu
->language
== language_cplus
15707 || cu
->language
== language_d
15708 || cu
->language
== language_rust
)
15710 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15712 /* dwarf2_full_name might have already finished building the DIE's
15713 type. If so, there is no need to continue. */
15714 if (get_die_type (die
, cu
) != NULL
)
15715 return get_die_type (die
, cu
);
15717 TYPE_TAG_NAME (type
) = full_name
;
15718 if (die
->tag
== DW_TAG_structure_type
15719 || die
->tag
== DW_TAG_class_type
)
15720 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15724 /* The name is already allocated along with this objfile, so
15725 we don't need to duplicate it for the type. */
15726 TYPE_TAG_NAME (type
) = name
;
15727 if (die
->tag
== DW_TAG_class_type
)
15728 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15732 if (die
->tag
== DW_TAG_structure_type
)
15734 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15736 else if (die
->tag
== DW_TAG_union_type
)
15738 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15740 else if (die
->tag
== DW_TAG_variant_part
)
15742 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15743 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15747 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15750 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15751 TYPE_DECLARED_CLASS (type
) = 1;
15753 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15756 if (attr_form_is_constant (attr
))
15757 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15760 /* For the moment, dynamic type sizes are not supported
15761 by GDB's struct type. The actual size is determined
15762 on-demand when resolving the type of a given object,
15763 so set the type's length to zero for now. Otherwise,
15764 we record an expression as the length, and that expression
15765 could lead to a very large value, which could eventually
15766 lead to us trying to allocate that much memory when creating
15767 a value of that type. */
15768 TYPE_LENGTH (type
) = 0;
15773 TYPE_LENGTH (type
) = 0;
15776 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15778 /* ICC<14 does not output the required DW_AT_declaration on
15779 incomplete types, but gives them a size of zero. */
15780 TYPE_STUB (type
) = 1;
15783 TYPE_STUB_SUPPORTED (type
) = 1;
15785 if (die_is_declaration (die
, cu
))
15786 TYPE_STUB (type
) = 1;
15787 else if (attr
== NULL
&& die
->child
== NULL
15788 && producer_is_realview (cu
->producer
))
15789 /* RealView does not output the required DW_AT_declaration
15790 on incomplete types. */
15791 TYPE_STUB (type
) = 1;
15793 /* We need to add the type field to the die immediately so we don't
15794 infinitely recurse when dealing with pointers to the structure
15795 type within the structure itself. */
15796 set_die_type (die
, type
, cu
);
15798 /* set_die_type should be already done. */
15799 set_descriptive_type (type
, die
, cu
);
15804 /* A helper for process_structure_scope that handles a single member
15808 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15809 struct field_info
*fi
,
15810 std::vector
<struct symbol
*> *template_args
,
15811 struct dwarf2_cu
*cu
)
15813 if (child_die
->tag
== DW_TAG_member
15814 || child_die
->tag
== DW_TAG_variable
15815 || child_die
->tag
== DW_TAG_variant_part
)
15817 /* NOTE: carlton/2002-11-05: A C++ static data member
15818 should be a DW_TAG_member that is a declaration, but
15819 all versions of G++ as of this writing (so through at
15820 least 3.2.1) incorrectly generate DW_TAG_variable
15821 tags for them instead. */
15822 dwarf2_add_field (fi
, child_die
, cu
);
15824 else if (child_die
->tag
== DW_TAG_subprogram
)
15826 /* Rust doesn't have member functions in the C++ sense.
15827 However, it does emit ordinary functions as children
15828 of a struct DIE. */
15829 if (cu
->language
== language_rust
)
15830 read_func_scope (child_die
, cu
);
15833 /* C++ member function. */
15834 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15837 else if (child_die
->tag
== DW_TAG_inheritance
)
15839 /* C++ base class field. */
15840 dwarf2_add_field (fi
, child_die
, cu
);
15842 else if (type_can_define_types (child_die
))
15843 dwarf2_add_type_defn (fi
, child_die
, cu
);
15844 else if (child_die
->tag
== DW_TAG_template_type_param
15845 || child_die
->tag
== DW_TAG_template_value_param
)
15847 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15850 template_args
->push_back (arg
);
15852 else if (child_die
->tag
== DW_TAG_variant
)
15854 /* In a variant we want to get the discriminant and also add a
15855 field for our sole member child. */
15856 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15858 for (struct die_info
*variant_child
= child_die
->child
;
15859 variant_child
!= NULL
;
15860 variant_child
= sibling_die (variant_child
))
15862 if (variant_child
->tag
== DW_TAG_member
)
15864 handle_struct_member_die (variant_child
, type
, fi
,
15865 template_args
, cu
);
15866 /* Only handle the one. */
15871 /* We don't handle this but we might as well report it if we see
15873 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15874 complaint (&symfile_complaints
,
15875 _("DW_AT_discr_list is not supported yet"
15876 " - DIE at %s [in module %s]"),
15877 sect_offset_str (child_die
->sect_off
),
15878 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15880 /* The first field was just added, so we can stash the
15881 discriminant there. */
15882 gdb_assert (!fi
->fields
.empty ());
15884 fi
->fields
.back ().variant
.default_branch
= true;
15886 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15890 /* Finish creating a structure or union type, including filling in
15891 its members and creating a symbol for it. */
15894 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15896 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15897 struct die_info
*child_die
;
15900 type
= get_die_type (die
, cu
);
15902 type
= read_structure_type (die
, cu
);
15904 /* When reading a DW_TAG_variant_part, we need to notice when we
15905 read the discriminant member, so we can record it later in the
15906 discriminant_info. */
15907 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15908 sect_offset discr_offset
;
15910 if (is_variant_part
)
15912 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15915 /* Maybe it's a univariant form, an extension we support.
15916 In this case arrange not to check the offset. */
15917 is_variant_part
= false;
15919 else if (attr_form_is_ref (discr
))
15921 struct dwarf2_cu
*target_cu
= cu
;
15922 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15924 discr_offset
= target_die
->sect_off
;
15928 complaint (&symfile_complaints
,
15929 _("DW_AT_discr does not have DIE reference form"
15930 " - DIE at %s [in module %s]"),
15931 sect_offset_str (die
->sect_off
),
15932 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15933 is_variant_part
= false;
15937 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15939 struct field_info fi
;
15940 std::vector
<struct symbol
*> template_args
;
15942 child_die
= die
->child
;
15944 while (child_die
&& child_die
->tag
)
15946 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15948 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15949 fi
.fields
.back ().variant
.is_discriminant
= true;
15951 child_die
= sibling_die (child_die
);
15954 /* Attach template arguments to type. */
15955 if (!template_args
.empty ())
15957 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15958 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15959 TYPE_TEMPLATE_ARGUMENTS (type
)
15960 = XOBNEWVEC (&objfile
->objfile_obstack
,
15962 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15963 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15964 template_args
.data (),
15965 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15966 * sizeof (struct symbol
*)));
15969 /* Attach fields and member functions to the type. */
15971 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15972 if (!fi
.fnfieldlists
.empty ())
15974 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15976 /* Get the type which refers to the base class (possibly this
15977 class itself) which contains the vtable pointer for the current
15978 class from the DW_AT_containing_type attribute. This use of
15979 DW_AT_containing_type is a GNU extension. */
15981 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15983 struct type
*t
= die_containing_type (die
, cu
);
15985 set_type_vptr_basetype (type
, t
);
15990 /* Our own class provides vtbl ptr. */
15991 for (i
= TYPE_NFIELDS (t
) - 1;
15992 i
>= TYPE_N_BASECLASSES (t
);
15995 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15997 if (is_vtable_name (fieldname
, cu
))
15999 set_type_vptr_fieldno (type
, i
);
16004 /* Complain if virtual function table field not found. */
16005 if (i
< TYPE_N_BASECLASSES (t
))
16006 complaint (&symfile_complaints
,
16007 _("virtual function table pointer "
16008 "not found when defining class '%s'"),
16009 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
16014 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16017 else if (cu
->producer
16018 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16020 /* The IBM XLC compiler does not provide direct indication
16021 of the containing type, but the vtable pointer is
16022 always named __vfp. */
16026 for (i
= TYPE_NFIELDS (type
) - 1;
16027 i
>= TYPE_N_BASECLASSES (type
);
16030 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16032 set_type_vptr_fieldno (type
, i
);
16033 set_type_vptr_basetype (type
, type
);
16040 /* Copy fi.typedef_field_list linked list elements content into the
16041 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16042 if (!fi
.typedef_field_list
.empty ())
16044 int count
= fi
.typedef_field_list
.size ();
16046 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16047 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16048 = ((struct decl_field
*)
16050 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16051 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16053 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16054 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16057 /* Copy fi.nested_types_list linked list elements content into the
16058 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16059 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16061 int count
= fi
.nested_types_list
.size ();
16063 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16064 TYPE_NESTED_TYPES_ARRAY (type
)
16065 = ((struct decl_field
*)
16066 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16067 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16069 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16070 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16074 quirk_gcc_member_function_pointer (type
, objfile
);
16075 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16076 cu
->rust_unions
.push_back (type
);
16078 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16079 snapshots) has been known to create a die giving a declaration
16080 for a class that has, as a child, a die giving a definition for a
16081 nested class. So we have to process our children even if the
16082 current die is a declaration. Normally, of course, a declaration
16083 won't have any children at all. */
16085 child_die
= die
->child
;
16087 while (child_die
!= NULL
&& child_die
->tag
)
16089 if (child_die
->tag
== DW_TAG_member
16090 || child_die
->tag
== DW_TAG_variable
16091 || child_die
->tag
== DW_TAG_inheritance
16092 || child_die
->tag
== DW_TAG_template_value_param
16093 || child_die
->tag
== DW_TAG_template_type_param
)
16098 process_die (child_die
, cu
);
16100 child_die
= sibling_die (child_die
);
16103 /* Do not consider external references. According to the DWARF standard,
16104 these DIEs are identified by the fact that they have no byte_size
16105 attribute, and a declaration attribute. */
16106 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16107 || !die_is_declaration (die
, cu
))
16108 new_symbol (die
, type
, cu
);
16111 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16112 update TYPE using some information only available in DIE's children. */
16115 update_enumeration_type_from_children (struct die_info
*die
,
16117 struct dwarf2_cu
*cu
)
16119 struct die_info
*child_die
;
16120 int unsigned_enum
= 1;
16124 auto_obstack obstack
;
16126 for (child_die
= die
->child
;
16127 child_die
!= NULL
&& child_die
->tag
;
16128 child_die
= sibling_die (child_die
))
16130 struct attribute
*attr
;
16132 const gdb_byte
*bytes
;
16133 struct dwarf2_locexpr_baton
*baton
;
16136 if (child_die
->tag
!= DW_TAG_enumerator
)
16139 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16143 name
= dwarf2_name (child_die
, cu
);
16145 name
= "<anonymous enumerator>";
16147 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16148 &value
, &bytes
, &baton
);
16154 else if ((mask
& value
) != 0)
16159 /* If we already know that the enum type is neither unsigned, nor
16160 a flag type, no need to look at the rest of the enumerates. */
16161 if (!unsigned_enum
&& !flag_enum
)
16166 TYPE_UNSIGNED (type
) = 1;
16168 TYPE_FLAG_ENUM (type
) = 1;
16171 /* Given a DW_AT_enumeration_type die, set its type. We do not
16172 complete the type's fields yet, or create any symbols. */
16174 static struct type
*
16175 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16177 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16179 struct attribute
*attr
;
16182 /* If the definition of this type lives in .debug_types, read that type.
16183 Don't follow DW_AT_specification though, that will take us back up
16184 the chain and we want to go down. */
16185 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16188 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16190 /* The type's CU may not be the same as CU.
16191 Ensure TYPE is recorded with CU in die_type_hash. */
16192 return set_die_type (die
, type
, cu
);
16195 type
= alloc_type (objfile
);
16197 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16198 name
= dwarf2_full_name (NULL
, die
, cu
);
16200 TYPE_TAG_NAME (type
) = name
;
16202 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16205 struct type
*underlying_type
= die_type (die
, cu
);
16207 TYPE_TARGET_TYPE (type
) = underlying_type
;
16210 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16213 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16217 TYPE_LENGTH (type
) = 0;
16220 /* The enumeration DIE can be incomplete. In Ada, any type can be
16221 declared as private in the package spec, and then defined only
16222 inside the package body. Such types are known as Taft Amendment
16223 Types. When another package uses such a type, an incomplete DIE
16224 may be generated by the compiler. */
16225 if (die_is_declaration (die
, cu
))
16226 TYPE_STUB (type
) = 1;
16228 /* Finish the creation of this type by using the enum's children.
16229 We must call this even when the underlying type has been provided
16230 so that we can determine if we're looking at a "flag" enum. */
16231 update_enumeration_type_from_children (die
, type
, cu
);
16233 /* If this type has an underlying type that is not a stub, then we
16234 may use its attributes. We always use the "unsigned" attribute
16235 in this situation, because ordinarily we guess whether the type
16236 is unsigned -- but the guess can be wrong and the underlying type
16237 can tell us the reality. However, we defer to a local size
16238 attribute if one exists, because this lets the compiler override
16239 the underlying type if needed. */
16240 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16242 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16243 if (TYPE_LENGTH (type
) == 0)
16244 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16247 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16249 return set_die_type (die
, type
, cu
);
16252 /* Given a pointer to a die which begins an enumeration, process all
16253 the dies that define the members of the enumeration, and create the
16254 symbol for the enumeration type.
16256 NOTE: We reverse the order of the element list. */
16259 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16261 struct type
*this_type
;
16263 this_type
= get_die_type (die
, cu
);
16264 if (this_type
== NULL
)
16265 this_type
= read_enumeration_type (die
, cu
);
16267 if (die
->child
!= NULL
)
16269 struct die_info
*child_die
;
16270 struct symbol
*sym
;
16271 struct field
*fields
= NULL
;
16272 int num_fields
= 0;
16275 child_die
= die
->child
;
16276 while (child_die
&& child_die
->tag
)
16278 if (child_die
->tag
!= DW_TAG_enumerator
)
16280 process_die (child_die
, cu
);
16284 name
= dwarf2_name (child_die
, cu
);
16287 sym
= new_symbol (child_die
, this_type
, cu
);
16289 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16291 fields
= (struct field
*)
16293 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16294 * sizeof (struct field
));
16297 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16298 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16299 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16300 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16306 child_die
= sibling_die (child_die
);
16311 TYPE_NFIELDS (this_type
) = num_fields
;
16312 TYPE_FIELDS (this_type
) = (struct field
*)
16313 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16314 memcpy (TYPE_FIELDS (this_type
), fields
,
16315 sizeof (struct field
) * num_fields
);
16320 /* If we are reading an enum from a .debug_types unit, and the enum
16321 is a declaration, and the enum is not the signatured type in the
16322 unit, then we do not want to add a symbol for it. Adding a
16323 symbol would in some cases obscure the true definition of the
16324 enum, giving users an incomplete type when the definition is
16325 actually available. Note that we do not want to do this for all
16326 enums which are just declarations, because C++0x allows forward
16327 enum declarations. */
16328 if (cu
->per_cu
->is_debug_types
16329 && die_is_declaration (die
, cu
))
16331 struct signatured_type
*sig_type
;
16333 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16334 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16335 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16339 new_symbol (die
, this_type
, cu
);
16342 /* Extract all information from a DW_TAG_array_type DIE and put it in
16343 the DIE's type field. For now, this only handles one dimensional
16346 static struct type
*
16347 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16349 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16350 struct die_info
*child_die
;
16352 struct type
*element_type
, *range_type
, *index_type
;
16353 struct attribute
*attr
;
16355 struct dynamic_prop
*byte_stride_prop
= NULL
;
16356 unsigned int bit_stride
= 0;
16358 element_type
= die_type (die
, cu
);
16360 /* The die_type call above may have already set the type for this DIE. */
16361 type
= get_die_type (die
, cu
);
16365 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16371 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16372 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16375 complaint (&symfile_complaints
,
16376 _("unable to read array DW_AT_byte_stride "
16377 " - DIE at %s [in module %s]"),
16378 sect_offset_str (die
->sect_off
),
16379 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16380 /* Ignore this attribute. We will likely not be able to print
16381 arrays of this type correctly, but there is little we can do
16382 to help if we cannot read the attribute's value. */
16383 byte_stride_prop
= NULL
;
16387 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16389 bit_stride
= DW_UNSND (attr
);
16391 /* Irix 6.2 native cc creates array types without children for
16392 arrays with unspecified length. */
16393 if (die
->child
== NULL
)
16395 index_type
= objfile_type (objfile
)->builtin_int
;
16396 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16397 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16398 byte_stride_prop
, bit_stride
);
16399 return set_die_type (die
, type
, cu
);
16402 std::vector
<struct type
*> range_types
;
16403 child_die
= die
->child
;
16404 while (child_die
&& child_die
->tag
)
16406 if (child_die
->tag
== DW_TAG_subrange_type
)
16408 struct type
*child_type
= read_type_die (child_die
, cu
);
16410 if (child_type
!= NULL
)
16412 /* The range type was succesfully read. Save it for the
16413 array type creation. */
16414 range_types
.push_back (child_type
);
16417 child_die
= sibling_die (child_die
);
16420 /* Dwarf2 dimensions are output from left to right, create the
16421 necessary array types in backwards order. */
16423 type
= element_type
;
16425 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16429 while (i
< range_types
.size ())
16430 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16431 byte_stride_prop
, bit_stride
);
16435 size_t ndim
= range_types
.size ();
16437 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16438 byte_stride_prop
, bit_stride
);
16441 /* Understand Dwarf2 support for vector types (like they occur on
16442 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16443 array type. This is not part of the Dwarf2/3 standard yet, but a
16444 custom vendor extension. The main difference between a regular
16445 array and the vector variant is that vectors are passed by value
16447 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16449 make_vector_type (type
);
16451 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16452 implementation may choose to implement triple vectors using this
16454 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16457 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16458 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16460 complaint (&symfile_complaints
,
16461 _("DW_AT_byte_size for array type smaller "
16462 "than the total size of elements"));
16465 name
= dwarf2_name (die
, cu
);
16467 TYPE_NAME (type
) = name
;
16469 /* Install the type in the die. */
16470 set_die_type (die
, type
, cu
);
16472 /* set_die_type should be already done. */
16473 set_descriptive_type (type
, die
, cu
);
16478 static enum dwarf_array_dim_ordering
16479 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16481 struct attribute
*attr
;
16483 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16486 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16488 /* GNU F77 is a special case, as at 08/2004 array type info is the
16489 opposite order to the dwarf2 specification, but data is still
16490 laid out as per normal fortran.
16492 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16493 version checking. */
16495 if (cu
->language
== language_fortran
16496 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16498 return DW_ORD_row_major
;
16501 switch (cu
->language_defn
->la_array_ordering
)
16503 case array_column_major
:
16504 return DW_ORD_col_major
;
16505 case array_row_major
:
16507 return DW_ORD_row_major
;
16511 /* Extract all information from a DW_TAG_set_type DIE and put it in
16512 the DIE's type field. */
16514 static struct type
*
16515 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16517 struct type
*domain_type
, *set_type
;
16518 struct attribute
*attr
;
16520 domain_type
= die_type (die
, cu
);
16522 /* The die_type call above may have already set the type for this DIE. */
16523 set_type
= get_die_type (die
, cu
);
16527 set_type
= create_set_type (NULL
, domain_type
);
16529 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16531 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16533 return set_die_type (die
, set_type
, cu
);
16536 /* A helper for read_common_block that creates a locexpr baton.
16537 SYM is the symbol which we are marking as computed.
16538 COMMON_DIE is the DIE for the common block.
16539 COMMON_LOC is the location expression attribute for the common
16541 MEMBER_LOC is the location expression attribute for the particular
16542 member of the common block that we are processing.
16543 CU is the CU from which the above come. */
16546 mark_common_block_symbol_computed (struct symbol
*sym
,
16547 struct die_info
*common_die
,
16548 struct attribute
*common_loc
,
16549 struct attribute
*member_loc
,
16550 struct dwarf2_cu
*cu
)
16552 struct dwarf2_per_objfile
*dwarf2_per_objfile
16553 = cu
->per_cu
->dwarf2_per_objfile
;
16554 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16555 struct dwarf2_locexpr_baton
*baton
;
16557 unsigned int cu_off
;
16558 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16559 LONGEST offset
= 0;
16561 gdb_assert (common_loc
&& member_loc
);
16562 gdb_assert (attr_form_is_block (common_loc
));
16563 gdb_assert (attr_form_is_block (member_loc
)
16564 || attr_form_is_constant (member_loc
));
16566 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16567 baton
->per_cu
= cu
->per_cu
;
16568 gdb_assert (baton
->per_cu
);
16570 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16572 if (attr_form_is_constant (member_loc
))
16574 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16575 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16578 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16580 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16583 *ptr
++ = DW_OP_call4
;
16584 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16585 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16588 if (attr_form_is_constant (member_loc
))
16590 *ptr
++ = DW_OP_addr
;
16591 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16592 ptr
+= cu
->header
.addr_size
;
16596 /* We have to copy the data here, because DW_OP_call4 will only
16597 use a DW_AT_location attribute. */
16598 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16599 ptr
+= DW_BLOCK (member_loc
)->size
;
16602 *ptr
++ = DW_OP_plus
;
16603 gdb_assert (ptr
- baton
->data
== baton
->size
);
16605 SYMBOL_LOCATION_BATON (sym
) = baton
;
16606 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16609 /* Create appropriate locally-scoped variables for all the
16610 DW_TAG_common_block entries. Also create a struct common_block
16611 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16612 is used to sepate the common blocks name namespace from regular
16616 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16618 struct attribute
*attr
;
16620 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16623 /* Support the .debug_loc offsets. */
16624 if (attr_form_is_block (attr
))
16628 else if (attr_form_is_section_offset (attr
))
16630 dwarf2_complex_location_expr_complaint ();
16635 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16636 "common block member");
16641 if (die
->child
!= NULL
)
16643 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16644 struct die_info
*child_die
;
16645 size_t n_entries
= 0, size
;
16646 struct common_block
*common_block
;
16647 struct symbol
*sym
;
16649 for (child_die
= die
->child
;
16650 child_die
&& child_die
->tag
;
16651 child_die
= sibling_die (child_die
))
16654 size
= (sizeof (struct common_block
)
16655 + (n_entries
- 1) * sizeof (struct symbol
*));
16657 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16659 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16660 common_block
->n_entries
= 0;
16662 for (child_die
= die
->child
;
16663 child_die
&& child_die
->tag
;
16664 child_die
= sibling_die (child_die
))
16666 /* Create the symbol in the DW_TAG_common_block block in the current
16668 sym
= new_symbol (child_die
, NULL
, cu
);
16671 struct attribute
*member_loc
;
16673 common_block
->contents
[common_block
->n_entries
++] = sym
;
16675 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16679 /* GDB has handled this for a long time, but it is
16680 not specified by DWARF. It seems to have been
16681 emitted by gfortran at least as recently as:
16682 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16683 complaint (&symfile_complaints
,
16684 _("Variable in common block has "
16685 "DW_AT_data_member_location "
16686 "- DIE at %s [in module %s]"),
16687 sect_offset_str (child_die
->sect_off
),
16688 objfile_name (objfile
));
16690 if (attr_form_is_section_offset (member_loc
))
16691 dwarf2_complex_location_expr_complaint ();
16692 else if (attr_form_is_constant (member_loc
)
16693 || attr_form_is_block (member_loc
))
16696 mark_common_block_symbol_computed (sym
, die
, attr
,
16700 dwarf2_complex_location_expr_complaint ();
16705 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16706 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16710 /* Create a type for a C++ namespace. */
16712 static struct type
*
16713 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16715 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16716 const char *previous_prefix
, *name
;
16720 /* For extensions, reuse the type of the original namespace. */
16721 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16723 struct die_info
*ext_die
;
16724 struct dwarf2_cu
*ext_cu
= cu
;
16726 ext_die
= dwarf2_extension (die
, &ext_cu
);
16727 type
= read_type_die (ext_die
, ext_cu
);
16729 /* EXT_CU may not be the same as CU.
16730 Ensure TYPE is recorded with CU in die_type_hash. */
16731 return set_die_type (die
, type
, cu
);
16734 name
= namespace_name (die
, &is_anonymous
, cu
);
16736 /* Now build the name of the current namespace. */
16738 previous_prefix
= determine_prefix (die
, cu
);
16739 if (previous_prefix
[0] != '\0')
16740 name
= typename_concat (&objfile
->objfile_obstack
,
16741 previous_prefix
, name
, 0, cu
);
16743 /* Create the type. */
16744 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16745 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16747 return set_die_type (die
, type
, cu
);
16750 /* Read a namespace scope. */
16753 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16755 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16758 /* Add a symbol associated to this if we haven't seen the namespace
16759 before. Also, add a using directive if it's an anonymous
16762 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16766 type
= read_type_die (die
, cu
);
16767 new_symbol (die
, type
, cu
);
16769 namespace_name (die
, &is_anonymous
, cu
);
16772 const char *previous_prefix
= determine_prefix (die
, cu
);
16774 std::vector
<const char *> excludes
;
16775 add_using_directive (using_directives (cu
->language
),
16776 previous_prefix
, TYPE_NAME (type
), NULL
,
16777 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16781 if (die
->child
!= NULL
)
16783 struct die_info
*child_die
= die
->child
;
16785 while (child_die
&& child_die
->tag
)
16787 process_die (child_die
, cu
);
16788 child_die
= sibling_die (child_die
);
16793 /* Read a Fortran module as type. This DIE can be only a declaration used for
16794 imported module. Still we need that type as local Fortran "use ... only"
16795 declaration imports depend on the created type in determine_prefix. */
16797 static struct type
*
16798 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16800 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16801 const char *module_name
;
16804 module_name
= dwarf2_name (die
, cu
);
16806 complaint (&symfile_complaints
,
16807 _("DW_TAG_module has no name, offset %s"),
16808 sect_offset_str (die
->sect_off
));
16809 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16811 /* determine_prefix uses TYPE_TAG_NAME. */
16812 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16814 return set_die_type (die
, type
, cu
);
16817 /* Read a Fortran module. */
16820 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16822 struct die_info
*child_die
= die
->child
;
16825 type
= read_type_die (die
, cu
);
16826 new_symbol (die
, type
, cu
);
16828 while (child_die
&& child_die
->tag
)
16830 process_die (child_die
, cu
);
16831 child_die
= sibling_die (child_die
);
16835 /* Return the name of the namespace represented by DIE. Set
16836 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16839 static const char *
16840 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16842 struct die_info
*current_die
;
16843 const char *name
= NULL
;
16845 /* Loop through the extensions until we find a name. */
16847 for (current_die
= die
;
16848 current_die
!= NULL
;
16849 current_die
= dwarf2_extension (die
, &cu
))
16851 /* We don't use dwarf2_name here so that we can detect the absence
16852 of a name -> anonymous namespace. */
16853 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16859 /* Is it an anonymous namespace? */
16861 *is_anonymous
= (name
== NULL
);
16863 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16868 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16869 the user defined type vector. */
16871 static struct type
*
16872 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16874 struct gdbarch
*gdbarch
16875 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16876 struct comp_unit_head
*cu_header
= &cu
->header
;
16878 struct attribute
*attr_byte_size
;
16879 struct attribute
*attr_address_class
;
16880 int byte_size
, addr_class
;
16881 struct type
*target_type
;
16883 target_type
= die_type (die
, cu
);
16885 /* The die_type call above may have already set the type for this DIE. */
16886 type
= get_die_type (die
, cu
);
16890 type
= lookup_pointer_type (target_type
);
16892 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16893 if (attr_byte_size
)
16894 byte_size
= DW_UNSND (attr_byte_size
);
16896 byte_size
= cu_header
->addr_size
;
16898 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16899 if (attr_address_class
)
16900 addr_class
= DW_UNSND (attr_address_class
);
16902 addr_class
= DW_ADDR_none
;
16904 /* If the pointer size or address class is different than the
16905 default, create a type variant marked as such and set the
16906 length accordingly. */
16907 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
16909 if (gdbarch_address_class_type_flags_p (gdbarch
))
16913 type_flags
= gdbarch_address_class_type_flags
16914 (gdbarch
, byte_size
, addr_class
);
16915 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16917 type
= make_type_with_address_space (type
, type_flags
);
16919 else if (TYPE_LENGTH (type
) != byte_size
)
16921 complaint (&symfile_complaints
,
16922 _("invalid pointer size %d"), byte_size
);
16926 /* Should we also complain about unhandled address classes? */
16930 TYPE_LENGTH (type
) = byte_size
;
16931 return set_die_type (die
, type
, cu
);
16934 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16935 the user defined type vector. */
16937 static struct type
*
16938 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16941 struct type
*to_type
;
16942 struct type
*domain
;
16944 to_type
= die_type (die
, cu
);
16945 domain
= die_containing_type (die
, cu
);
16947 /* The calls above may have already set the type for this DIE. */
16948 type
= get_die_type (die
, cu
);
16952 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16953 type
= lookup_methodptr_type (to_type
);
16954 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16956 struct type
*new_type
16957 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16959 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16960 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16961 TYPE_VARARGS (to_type
));
16962 type
= lookup_methodptr_type (new_type
);
16965 type
= lookup_memberptr_type (to_type
, domain
);
16967 return set_die_type (die
, type
, cu
);
16970 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16971 the user defined type vector. */
16973 static struct type
*
16974 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16975 enum type_code refcode
)
16977 struct comp_unit_head
*cu_header
= &cu
->header
;
16978 struct type
*type
, *target_type
;
16979 struct attribute
*attr
;
16981 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16983 target_type
= die_type (die
, cu
);
16985 /* The die_type call above may have already set the type for this DIE. */
16986 type
= get_die_type (die
, cu
);
16990 type
= lookup_reference_type (target_type
, refcode
);
16991 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16994 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16998 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17000 return set_die_type (die
, type
, cu
);
17003 /* Add the given cv-qualifiers to the element type of the array. GCC
17004 outputs DWARF type qualifiers that apply to an array, not the
17005 element type. But GDB relies on the array element type to carry
17006 the cv-qualifiers. This mimics section 6.7.3 of the C99
17009 static struct type
*
17010 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17011 struct type
*base_type
, int cnst
, int voltl
)
17013 struct type
*el_type
, *inner_array
;
17015 base_type
= copy_type (base_type
);
17016 inner_array
= base_type
;
17018 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17020 TYPE_TARGET_TYPE (inner_array
) =
17021 copy_type (TYPE_TARGET_TYPE (inner_array
));
17022 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17025 el_type
= TYPE_TARGET_TYPE (inner_array
);
17026 cnst
|= TYPE_CONST (el_type
);
17027 voltl
|= TYPE_VOLATILE (el_type
);
17028 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17030 return set_die_type (die
, base_type
, cu
);
17033 static struct type
*
17034 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17036 struct type
*base_type
, *cv_type
;
17038 base_type
= die_type (die
, cu
);
17040 /* The die_type call above may have already set the type for this DIE. */
17041 cv_type
= get_die_type (die
, cu
);
17045 /* In case the const qualifier is applied to an array type, the element type
17046 is so qualified, not the array type (section 6.7.3 of C99). */
17047 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17048 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17050 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17051 return set_die_type (die
, cv_type
, cu
);
17054 static struct type
*
17055 read_tag_volatile_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 volatile qualifier is applied to an array type, the
17067 element type is so qualified, not the array type (section 6.7.3
17069 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17070 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17072 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17073 return set_die_type (die
, cv_type
, cu
);
17076 /* Handle DW_TAG_restrict_type. */
17078 static struct type
*
17079 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17081 struct type
*base_type
, *cv_type
;
17083 base_type
= die_type (die
, cu
);
17085 /* The die_type call above may have already set the type for this DIE. */
17086 cv_type
= get_die_type (die
, cu
);
17090 cv_type
= make_restrict_type (base_type
);
17091 return set_die_type (die
, cv_type
, cu
);
17094 /* Handle DW_TAG_atomic_type. */
17096 static struct type
*
17097 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17099 struct type
*base_type
, *cv_type
;
17101 base_type
= die_type (die
, cu
);
17103 /* The die_type call above may have already set the type for this DIE. */
17104 cv_type
= get_die_type (die
, cu
);
17108 cv_type
= make_atomic_type (base_type
);
17109 return set_die_type (die
, cv_type
, cu
);
17112 /* Extract all information from a DW_TAG_string_type DIE and add to
17113 the user defined type vector. It isn't really a user defined type,
17114 but it behaves like one, with other DIE's using an AT_user_def_type
17115 attribute to reference it. */
17117 static struct type
*
17118 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17120 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17121 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17122 struct type
*type
, *range_type
, *index_type
, *char_type
;
17123 struct attribute
*attr
;
17124 unsigned int length
;
17126 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17129 length
= DW_UNSND (attr
);
17133 /* Check for the DW_AT_byte_size attribute. */
17134 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17137 length
= DW_UNSND (attr
);
17145 index_type
= objfile_type (objfile
)->builtin_int
;
17146 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17147 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17148 type
= create_string_type (NULL
, char_type
, range_type
);
17150 return set_die_type (die
, type
, cu
);
17153 /* Assuming that DIE corresponds to a function, returns nonzero
17154 if the function is prototyped. */
17157 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17159 struct attribute
*attr
;
17161 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17162 if (attr
&& (DW_UNSND (attr
) != 0))
17165 /* The DWARF standard implies that the DW_AT_prototyped attribute
17166 is only meaninful for C, but the concept also extends to other
17167 languages that allow unprototyped functions (Eg: Objective C).
17168 For all other languages, assume that functions are always
17170 if (cu
->language
!= language_c
17171 && cu
->language
!= language_objc
17172 && cu
->language
!= language_opencl
)
17175 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17176 prototyped and unprototyped functions; default to prototyped,
17177 since that is more common in modern code (and RealView warns
17178 about unprototyped functions). */
17179 if (producer_is_realview (cu
->producer
))
17185 /* Handle DIES due to C code like:
17189 int (*funcp)(int a, long l);
17193 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17195 static struct type
*
17196 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17198 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17199 struct type
*type
; /* Type that this function returns. */
17200 struct type
*ftype
; /* Function that returns above type. */
17201 struct attribute
*attr
;
17203 type
= die_type (die
, cu
);
17205 /* The die_type call above may have already set the type for this DIE. */
17206 ftype
= get_die_type (die
, cu
);
17210 ftype
= lookup_function_type (type
);
17212 if (prototyped_function_p (die
, cu
))
17213 TYPE_PROTOTYPED (ftype
) = 1;
17215 /* Store the calling convention in the type if it's available in
17216 the subroutine die. Otherwise set the calling convention to
17217 the default value DW_CC_normal. */
17218 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17220 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17221 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17222 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17224 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17226 /* Record whether the function returns normally to its caller or not
17227 if the DWARF producer set that information. */
17228 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17229 if (attr
&& (DW_UNSND (attr
) != 0))
17230 TYPE_NO_RETURN (ftype
) = 1;
17232 /* We need to add the subroutine type to the die immediately so
17233 we don't infinitely recurse when dealing with parameters
17234 declared as the same subroutine type. */
17235 set_die_type (die
, ftype
, cu
);
17237 if (die
->child
!= NULL
)
17239 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17240 struct die_info
*child_die
;
17241 int nparams
, iparams
;
17243 /* Count the number of parameters.
17244 FIXME: GDB currently ignores vararg functions, but knows about
17245 vararg member functions. */
17247 child_die
= die
->child
;
17248 while (child_die
&& child_die
->tag
)
17250 if (child_die
->tag
== DW_TAG_formal_parameter
)
17252 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17253 TYPE_VARARGS (ftype
) = 1;
17254 child_die
= sibling_die (child_die
);
17257 /* Allocate storage for parameters and fill them in. */
17258 TYPE_NFIELDS (ftype
) = nparams
;
17259 TYPE_FIELDS (ftype
) = (struct field
*)
17260 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17262 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17263 even if we error out during the parameters reading below. */
17264 for (iparams
= 0; iparams
< nparams
; iparams
++)
17265 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17268 child_die
= die
->child
;
17269 while (child_die
&& child_die
->tag
)
17271 if (child_die
->tag
== DW_TAG_formal_parameter
)
17273 struct type
*arg_type
;
17275 /* DWARF version 2 has no clean way to discern C++
17276 static and non-static member functions. G++ helps
17277 GDB by marking the first parameter for non-static
17278 member functions (which is the this pointer) as
17279 artificial. We pass this information to
17280 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17282 DWARF version 3 added DW_AT_object_pointer, which GCC
17283 4.5 does not yet generate. */
17284 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17286 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17288 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17289 arg_type
= die_type (child_die
, cu
);
17291 /* RealView does not mark THIS as const, which the testsuite
17292 expects. GCC marks THIS as const in method definitions,
17293 but not in the class specifications (GCC PR 43053). */
17294 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17295 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17298 struct dwarf2_cu
*arg_cu
= cu
;
17299 const char *name
= dwarf2_name (child_die
, cu
);
17301 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17304 /* If the compiler emits this, use it. */
17305 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17308 else if (name
&& strcmp (name
, "this") == 0)
17309 /* Function definitions will have the argument names. */
17311 else if (name
== NULL
&& iparams
== 0)
17312 /* Declarations may not have the names, so like
17313 elsewhere in GDB, assume an artificial first
17314 argument is "this". */
17318 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17322 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17325 child_die
= sibling_die (child_die
);
17332 static struct type
*
17333 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17335 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17336 const char *name
= NULL
;
17337 struct type
*this_type
, *target_type
;
17339 name
= dwarf2_full_name (NULL
, die
, cu
);
17340 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17341 TYPE_TARGET_STUB (this_type
) = 1;
17342 set_die_type (die
, this_type
, cu
);
17343 target_type
= die_type (die
, cu
);
17344 if (target_type
!= this_type
)
17345 TYPE_TARGET_TYPE (this_type
) = target_type
;
17348 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17349 spec and cause infinite loops in GDB. */
17350 complaint (&symfile_complaints
,
17351 _("Self-referential DW_TAG_typedef "
17352 "- DIE at %s [in module %s]"),
17353 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17354 TYPE_TARGET_TYPE (this_type
) = NULL
;
17359 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17360 (which may be different from NAME) to the architecture back-end to allow
17361 it to guess the correct format if necessary. */
17363 static struct type
*
17364 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17365 const char *name_hint
)
17367 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17368 const struct floatformat
**format
;
17371 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17373 type
= init_float_type (objfile
, bits
, name
, format
);
17375 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17380 /* Find a representation of a given base type and install
17381 it in the TYPE field of the die. */
17383 static struct type
*
17384 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17386 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17388 struct attribute
*attr
;
17389 int encoding
= 0, bits
= 0;
17392 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17395 encoding
= DW_UNSND (attr
);
17397 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17400 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17402 name
= dwarf2_name (die
, cu
);
17405 complaint (&symfile_complaints
,
17406 _("DW_AT_name missing from DW_TAG_base_type"));
17411 case DW_ATE_address
:
17412 /* Turn DW_ATE_address into a void * pointer. */
17413 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17414 type
= init_pointer_type (objfile
, bits
, name
, type
);
17416 case DW_ATE_boolean
:
17417 type
= init_boolean_type (objfile
, bits
, 1, name
);
17419 case DW_ATE_complex_float
:
17420 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17421 type
= init_complex_type (objfile
, name
, type
);
17423 case DW_ATE_decimal_float
:
17424 type
= init_decfloat_type (objfile
, bits
, name
);
17427 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17429 case DW_ATE_signed
:
17430 type
= init_integer_type (objfile
, bits
, 0, name
);
17432 case DW_ATE_unsigned
:
17433 if (cu
->language
== language_fortran
17435 && startswith (name
, "character("))
17436 type
= init_character_type (objfile
, bits
, 1, name
);
17438 type
= init_integer_type (objfile
, bits
, 1, name
);
17440 case DW_ATE_signed_char
:
17441 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17442 || cu
->language
== language_pascal
17443 || cu
->language
== language_fortran
)
17444 type
= init_character_type (objfile
, bits
, 0, name
);
17446 type
= init_integer_type (objfile
, bits
, 0, name
);
17448 case DW_ATE_unsigned_char
:
17449 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17450 || cu
->language
== language_pascal
17451 || cu
->language
== language_fortran
17452 || cu
->language
== language_rust
)
17453 type
= init_character_type (objfile
, bits
, 1, name
);
17455 type
= init_integer_type (objfile
, bits
, 1, name
);
17459 gdbarch
*arch
= get_objfile_arch (objfile
);
17462 type
= builtin_type (arch
)->builtin_char16
;
17463 else if (bits
== 32)
17464 type
= builtin_type (arch
)->builtin_char32
;
17467 complaint (&symfile_complaints
,
17468 _("unsupported DW_ATE_UTF bit size: '%d'"),
17470 type
= init_integer_type (objfile
, bits
, 1, name
);
17472 return set_die_type (die
, type
, cu
);
17477 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17478 dwarf_type_encoding_name (encoding
));
17479 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17483 if (name
&& strcmp (name
, "char") == 0)
17484 TYPE_NOSIGN (type
) = 1;
17486 return set_die_type (die
, type
, cu
);
17489 /* Parse dwarf attribute if it's a block, reference or constant and put the
17490 resulting value of the attribute into struct bound_prop.
17491 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17494 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17495 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17497 struct dwarf2_property_baton
*baton
;
17498 struct obstack
*obstack
17499 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17501 if (attr
== NULL
|| prop
== NULL
)
17504 if (attr_form_is_block (attr
))
17506 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17507 baton
->referenced_type
= NULL
;
17508 baton
->locexpr
.per_cu
= cu
->per_cu
;
17509 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17510 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17511 prop
->data
.baton
= baton
;
17512 prop
->kind
= PROP_LOCEXPR
;
17513 gdb_assert (prop
->data
.baton
!= NULL
);
17515 else if (attr_form_is_ref (attr
))
17517 struct dwarf2_cu
*target_cu
= cu
;
17518 struct die_info
*target_die
;
17519 struct attribute
*target_attr
;
17521 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17522 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17523 if (target_attr
== NULL
)
17524 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17526 if (target_attr
== NULL
)
17529 switch (target_attr
->name
)
17531 case DW_AT_location
:
17532 if (attr_form_is_section_offset (target_attr
))
17534 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17535 baton
->referenced_type
= die_type (target_die
, target_cu
);
17536 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17537 prop
->data
.baton
= baton
;
17538 prop
->kind
= PROP_LOCLIST
;
17539 gdb_assert (prop
->data
.baton
!= NULL
);
17541 else if (attr_form_is_block (target_attr
))
17543 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17544 baton
->referenced_type
= die_type (target_die
, target_cu
);
17545 baton
->locexpr
.per_cu
= cu
->per_cu
;
17546 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17547 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17548 prop
->data
.baton
= baton
;
17549 prop
->kind
= PROP_LOCEXPR
;
17550 gdb_assert (prop
->data
.baton
!= NULL
);
17554 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17555 "dynamic property");
17559 case DW_AT_data_member_location
:
17563 if (!handle_data_member_location (target_die
, target_cu
,
17567 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17568 baton
->referenced_type
= read_type_die (target_die
->parent
,
17570 baton
->offset_info
.offset
= offset
;
17571 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17572 prop
->data
.baton
= baton
;
17573 prop
->kind
= PROP_ADDR_OFFSET
;
17578 else if (attr_form_is_constant (attr
))
17580 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17581 prop
->kind
= PROP_CONST
;
17585 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17586 dwarf2_name (die
, cu
));
17593 /* Read the given DW_AT_subrange DIE. */
17595 static struct type
*
17596 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17598 struct type
*base_type
, *orig_base_type
;
17599 struct type
*range_type
;
17600 struct attribute
*attr
;
17601 struct dynamic_prop low
, high
;
17602 int low_default_is_valid
;
17603 int high_bound_is_count
= 0;
17605 LONGEST negative_mask
;
17607 orig_base_type
= die_type (die
, cu
);
17608 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17609 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17610 creating the range type, but we use the result of check_typedef
17611 when examining properties of the type. */
17612 base_type
= check_typedef (orig_base_type
);
17614 /* The die_type call above may have already set the type for this DIE. */
17615 range_type
= get_die_type (die
, cu
);
17619 low
.kind
= PROP_CONST
;
17620 high
.kind
= PROP_CONST
;
17621 high
.data
.const_val
= 0;
17623 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17624 omitting DW_AT_lower_bound. */
17625 switch (cu
->language
)
17628 case language_cplus
:
17629 low
.data
.const_val
= 0;
17630 low_default_is_valid
= 1;
17632 case language_fortran
:
17633 low
.data
.const_val
= 1;
17634 low_default_is_valid
= 1;
17637 case language_objc
:
17638 case language_rust
:
17639 low
.data
.const_val
= 0;
17640 low_default_is_valid
= (cu
->header
.version
>= 4);
17644 case language_pascal
:
17645 low
.data
.const_val
= 1;
17646 low_default_is_valid
= (cu
->header
.version
>= 4);
17649 low
.data
.const_val
= 0;
17650 low_default_is_valid
= 0;
17654 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17656 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17657 else if (!low_default_is_valid
)
17658 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17659 "- DIE at %s [in module %s]"),
17660 sect_offset_str (die
->sect_off
),
17661 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17663 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17664 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17666 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17667 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17669 /* If bounds are constant do the final calculation here. */
17670 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17671 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17673 high_bound_is_count
= 1;
17677 /* Dwarf-2 specifications explicitly allows to create subrange types
17678 without specifying a base type.
17679 In that case, the base type must be set to the type of
17680 the lower bound, upper bound or count, in that order, if any of these
17681 three attributes references an object that has a type.
17682 If no base type is found, the Dwarf-2 specifications say that
17683 a signed integer type of size equal to the size of an address should
17685 For the following C code: `extern char gdb_int [];'
17686 GCC produces an empty range DIE.
17687 FIXME: muller/2010-05-28: Possible references to object for low bound,
17688 high bound or count are not yet handled by this code. */
17689 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17691 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17692 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17693 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17694 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17696 /* Test "int", "long int", and "long long int" objfile types,
17697 and select the first one having a size above or equal to the
17698 architecture address size. */
17699 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17700 base_type
= int_type
;
17703 int_type
= objfile_type (objfile
)->builtin_long
;
17704 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17705 base_type
= int_type
;
17708 int_type
= objfile_type (objfile
)->builtin_long_long
;
17709 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17710 base_type
= int_type
;
17715 /* Normally, the DWARF producers are expected to use a signed
17716 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17717 But this is unfortunately not always the case, as witnessed
17718 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17719 is used instead. To work around that ambiguity, we treat
17720 the bounds as signed, and thus sign-extend their values, when
17721 the base type is signed. */
17723 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17724 if (low
.kind
== PROP_CONST
17725 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17726 low
.data
.const_val
|= negative_mask
;
17727 if (high
.kind
== PROP_CONST
17728 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17729 high
.data
.const_val
|= negative_mask
;
17731 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17733 if (high_bound_is_count
)
17734 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17736 /* Ada expects an empty array on no boundary attributes. */
17737 if (attr
== NULL
&& cu
->language
!= language_ada
)
17738 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17740 name
= dwarf2_name (die
, cu
);
17742 TYPE_NAME (range_type
) = name
;
17744 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17746 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17748 set_die_type (die
, range_type
, cu
);
17750 /* set_die_type should be already done. */
17751 set_descriptive_type (range_type
, die
, cu
);
17756 static struct type
*
17757 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17761 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17763 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17765 /* In Ada, an unspecified type is typically used when the description
17766 of the type is defered to a different unit. When encountering
17767 such a type, we treat it as a stub, and try to resolve it later on,
17769 if (cu
->language
== language_ada
)
17770 TYPE_STUB (type
) = 1;
17772 return set_die_type (die
, type
, cu
);
17775 /* Read a single die and all its descendents. Set the die's sibling
17776 field to NULL; set other fields in the die correctly, and set all
17777 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17778 location of the info_ptr after reading all of those dies. PARENT
17779 is the parent of the die in question. */
17781 static struct die_info
*
17782 read_die_and_children (const struct die_reader_specs
*reader
,
17783 const gdb_byte
*info_ptr
,
17784 const gdb_byte
**new_info_ptr
,
17785 struct die_info
*parent
)
17787 struct die_info
*die
;
17788 const gdb_byte
*cur_ptr
;
17791 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17794 *new_info_ptr
= cur_ptr
;
17797 store_in_ref_table (die
, reader
->cu
);
17800 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17804 *new_info_ptr
= cur_ptr
;
17807 die
->sibling
= NULL
;
17808 die
->parent
= parent
;
17812 /* Read a die, all of its descendents, and all of its siblings; set
17813 all of the fields of all of the dies correctly. Arguments are as
17814 in read_die_and_children. */
17816 static struct die_info
*
17817 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17818 const gdb_byte
*info_ptr
,
17819 const gdb_byte
**new_info_ptr
,
17820 struct die_info
*parent
)
17822 struct die_info
*first_die
, *last_sibling
;
17823 const gdb_byte
*cur_ptr
;
17825 cur_ptr
= info_ptr
;
17826 first_die
= last_sibling
= NULL
;
17830 struct die_info
*die
17831 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17835 *new_info_ptr
= cur_ptr
;
17842 last_sibling
->sibling
= die
;
17844 last_sibling
= die
;
17848 /* Read a die, all of its descendents, and all of its siblings; set
17849 all of the fields of all of the dies correctly. Arguments are as
17850 in read_die_and_children.
17851 This the main entry point for reading a DIE and all its children. */
17853 static struct die_info
*
17854 read_die_and_siblings (const struct die_reader_specs
*reader
,
17855 const gdb_byte
*info_ptr
,
17856 const gdb_byte
**new_info_ptr
,
17857 struct die_info
*parent
)
17859 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17860 new_info_ptr
, parent
);
17862 if (dwarf_die_debug
)
17864 fprintf_unfiltered (gdb_stdlog
,
17865 "Read die from %s@0x%x of %s:\n",
17866 get_section_name (reader
->die_section
),
17867 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17868 bfd_get_filename (reader
->abfd
));
17869 dump_die (die
, dwarf_die_debug
);
17875 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17877 The caller is responsible for filling in the extra attributes
17878 and updating (*DIEP)->num_attrs.
17879 Set DIEP to point to a newly allocated die with its information,
17880 except for its child, sibling, and parent fields.
17881 Set HAS_CHILDREN to tell whether the die has children or not. */
17883 static const gdb_byte
*
17884 read_full_die_1 (const struct die_reader_specs
*reader
,
17885 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17886 int *has_children
, int num_extra_attrs
)
17888 unsigned int abbrev_number
, bytes_read
, i
;
17889 struct abbrev_info
*abbrev
;
17890 struct die_info
*die
;
17891 struct dwarf2_cu
*cu
= reader
->cu
;
17892 bfd
*abfd
= reader
->abfd
;
17894 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17895 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17896 info_ptr
+= bytes_read
;
17897 if (!abbrev_number
)
17904 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17906 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17908 bfd_get_filename (abfd
));
17910 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17911 die
->sect_off
= sect_off
;
17912 die
->tag
= abbrev
->tag
;
17913 die
->abbrev
= abbrev_number
;
17915 /* Make the result usable.
17916 The caller needs to update num_attrs after adding the extra
17918 die
->num_attrs
= abbrev
->num_attrs
;
17920 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17921 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17925 *has_children
= abbrev
->has_children
;
17929 /* Read a die and all its attributes.
17930 Set DIEP to point to a newly allocated die with its information,
17931 except for its child, sibling, and parent fields.
17932 Set HAS_CHILDREN to tell whether the die has children or not. */
17934 static const gdb_byte
*
17935 read_full_die (const struct die_reader_specs
*reader
,
17936 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17939 const gdb_byte
*result
;
17941 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17943 if (dwarf_die_debug
)
17945 fprintf_unfiltered (gdb_stdlog
,
17946 "Read die from %s@0x%x of %s:\n",
17947 get_section_name (reader
->die_section
),
17948 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17949 bfd_get_filename (reader
->abfd
));
17950 dump_die (*diep
, dwarf_die_debug
);
17956 /* Abbreviation tables.
17958 In DWARF version 2, the description of the debugging information is
17959 stored in a separate .debug_abbrev section. Before we read any
17960 dies from a section we read in all abbreviations and install them
17961 in a hash table. */
17963 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17965 struct abbrev_info
*
17966 abbrev_table::alloc_abbrev ()
17968 struct abbrev_info
*abbrev
;
17970 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17971 memset (abbrev
, 0, sizeof (struct abbrev_info
));
17976 /* Add an abbreviation to the table. */
17979 abbrev_table::add_abbrev (unsigned int abbrev_number
,
17980 struct abbrev_info
*abbrev
)
17982 unsigned int hash_number
;
17984 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17985 abbrev
->next
= m_abbrevs
[hash_number
];
17986 m_abbrevs
[hash_number
] = abbrev
;
17989 /* Look up an abbrev in the table.
17990 Returns NULL if the abbrev is not found. */
17992 struct abbrev_info
*
17993 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
17995 unsigned int hash_number
;
17996 struct abbrev_info
*abbrev
;
17998 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17999 abbrev
= m_abbrevs
[hash_number
];
18003 if (abbrev
->number
== abbrev_number
)
18005 abbrev
= abbrev
->next
;
18010 /* Read in an abbrev table. */
18012 static abbrev_table_up
18013 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18014 struct dwarf2_section_info
*section
,
18015 sect_offset sect_off
)
18017 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18018 bfd
*abfd
= get_section_bfd_owner (section
);
18019 const gdb_byte
*abbrev_ptr
;
18020 struct abbrev_info
*cur_abbrev
;
18021 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18022 unsigned int abbrev_form
;
18023 struct attr_abbrev
*cur_attrs
;
18024 unsigned int allocated_attrs
;
18026 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18028 dwarf2_read_section (objfile
, section
);
18029 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18030 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18031 abbrev_ptr
+= bytes_read
;
18033 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18034 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18036 /* Loop until we reach an abbrev number of 0. */
18037 while (abbrev_number
)
18039 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18041 /* read in abbrev header */
18042 cur_abbrev
->number
= abbrev_number
;
18044 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18045 abbrev_ptr
+= bytes_read
;
18046 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18049 /* now read in declarations */
18052 LONGEST implicit_const
;
18054 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18055 abbrev_ptr
+= bytes_read
;
18056 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18057 abbrev_ptr
+= bytes_read
;
18058 if (abbrev_form
== DW_FORM_implicit_const
)
18060 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18062 abbrev_ptr
+= bytes_read
;
18066 /* Initialize it due to a false compiler warning. */
18067 implicit_const
= -1;
18070 if (abbrev_name
== 0)
18073 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18075 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18077 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18080 cur_attrs
[cur_abbrev
->num_attrs
].name
18081 = (enum dwarf_attribute
) abbrev_name
;
18082 cur_attrs
[cur_abbrev
->num_attrs
].form
18083 = (enum dwarf_form
) abbrev_form
;
18084 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18085 ++cur_abbrev
->num_attrs
;
18088 cur_abbrev
->attrs
=
18089 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18090 cur_abbrev
->num_attrs
);
18091 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18092 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18094 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18096 /* Get next abbreviation.
18097 Under Irix6 the abbreviations for a compilation unit are not
18098 always properly terminated with an abbrev number of 0.
18099 Exit loop if we encounter an abbreviation which we have
18100 already read (which means we are about to read the abbreviations
18101 for the next compile unit) or if the end of the abbreviation
18102 table is reached. */
18103 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18105 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18106 abbrev_ptr
+= bytes_read
;
18107 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18112 return abbrev_table
;
18115 /* Returns nonzero if TAG represents a type that we might generate a partial
18119 is_type_tag_for_partial (int tag
)
18124 /* Some types that would be reasonable to generate partial symbols for,
18125 that we don't at present. */
18126 case DW_TAG_array_type
:
18127 case DW_TAG_file_type
:
18128 case DW_TAG_ptr_to_member_type
:
18129 case DW_TAG_set_type
:
18130 case DW_TAG_string_type
:
18131 case DW_TAG_subroutine_type
:
18133 case DW_TAG_base_type
:
18134 case DW_TAG_class_type
:
18135 case DW_TAG_interface_type
:
18136 case DW_TAG_enumeration_type
:
18137 case DW_TAG_structure_type
:
18138 case DW_TAG_subrange_type
:
18139 case DW_TAG_typedef
:
18140 case DW_TAG_union_type
:
18147 /* Load all DIEs that are interesting for partial symbols into memory. */
18149 static struct partial_die_info
*
18150 load_partial_dies (const struct die_reader_specs
*reader
,
18151 const gdb_byte
*info_ptr
, int building_psymtab
)
18153 struct dwarf2_cu
*cu
= reader
->cu
;
18154 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18155 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18156 unsigned int bytes_read
;
18157 unsigned int load_all
= 0;
18158 int nesting_level
= 1;
18163 gdb_assert (cu
->per_cu
!= NULL
);
18164 if (cu
->per_cu
->load_all_dies
)
18168 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18172 &cu
->comp_unit_obstack
,
18173 hashtab_obstack_allocate
,
18174 dummy_obstack_deallocate
);
18178 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18180 /* A NULL abbrev means the end of a series of children. */
18181 if (abbrev
== NULL
)
18183 if (--nesting_level
== 0)
18186 info_ptr
+= bytes_read
;
18187 last_die
= parent_die
;
18188 parent_die
= parent_die
->die_parent
;
18192 /* Check for template arguments. We never save these; if
18193 they're seen, we just mark the parent, and go on our way. */
18194 if (parent_die
!= NULL
18195 && cu
->language
== language_cplus
18196 && (abbrev
->tag
== DW_TAG_template_type_param
18197 || abbrev
->tag
== DW_TAG_template_value_param
))
18199 parent_die
->has_template_arguments
= 1;
18203 /* We don't need a partial DIE for the template argument. */
18204 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18209 /* We only recurse into c++ subprograms looking for template arguments.
18210 Skip their other children. */
18212 && cu
->language
== language_cplus
18213 && parent_die
!= NULL
18214 && parent_die
->tag
== DW_TAG_subprogram
)
18216 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18220 /* Check whether this DIE is interesting enough to save. Normally
18221 we would not be interested in members here, but there may be
18222 later variables referencing them via DW_AT_specification (for
18223 static members). */
18225 && !is_type_tag_for_partial (abbrev
->tag
)
18226 && abbrev
->tag
!= DW_TAG_constant
18227 && abbrev
->tag
!= DW_TAG_enumerator
18228 && abbrev
->tag
!= DW_TAG_subprogram
18229 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18230 && abbrev
->tag
!= DW_TAG_lexical_block
18231 && abbrev
->tag
!= DW_TAG_variable
18232 && abbrev
->tag
!= DW_TAG_namespace
18233 && abbrev
->tag
!= DW_TAG_module
18234 && abbrev
->tag
!= DW_TAG_member
18235 && abbrev
->tag
!= DW_TAG_imported_unit
18236 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18238 /* Otherwise we skip to the next sibling, if any. */
18239 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18243 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18246 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18248 /* This two-pass algorithm for processing partial symbols has a
18249 high cost in cache pressure. Thus, handle some simple cases
18250 here which cover the majority of C partial symbols. DIEs
18251 which neither have specification tags in them, nor could have
18252 specification tags elsewhere pointing at them, can simply be
18253 processed and discarded.
18255 This segment is also optional; scan_partial_symbols and
18256 add_partial_symbol will handle these DIEs if we chain
18257 them in normally. When compilers which do not emit large
18258 quantities of duplicate debug information are more common,
18259 this code can probably be removed. */
18261 /* Any complete simple types at the top level (pretty much all
18262 of them, for a language without namespaces), can be processed
18264 if (parent_die
== NULL
18265 && pdi
.has_specification
== 0
18266 && pdi
.is_declaration
== 0
18267 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18268 || pdi
.tag
== DW_TAG_base_type
18269 || pdi
.tag
== DW_TAG_subrange_type
))
18271 if (building_psymtab
&& pdi
.name
!= NULL
)
18272 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18273 VAR_DOMAIN
, LOC_TYPEDEF
,
18274 &objfile
->static_psymbols
,
18275 0, cu
->language
, objfile
);
18276 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18280 /* The exception for DW_TAG_typedef with has_children above is
18281 a workaround of GCC PR debug/47510. In the case of this complaint
18282 type_name_no_tag_or_error will error on such types later.
18284 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18285 it could not find the child DIEs referenced later, this is checked
18286 above. In correct DWARF DW_TAG_typedef should have no children. */
18288 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18289 complaint (&symfile_complaints
,
18290 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18291 "- DIE at %s [in module %s]"),
18292 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18294 /* If we're at the second level, and we're an enumerator, and
18295 our parent has no specification (meaning possibly lives in a
18296 namespace elsewhere), then we can add the partial symbol now
18297 instead of queueing it. */
18298 if (pdi
.tag
== DW_TAG_enumerator
18299 && parent_die
!= NULL
18300 && parent_die
->die_parent
== NULL
18301 && parent_die
->tag
== DW_TAG_enumeration_type
18302 && parent_die
->has_specification
== 0)
18304 if (pdi
.name
== NULL
)
18305 complaint (&symfile_complaints
,
18306 _("malformed enumerator DIE ignored"));
18307 else if (building_psymtab
)
18308 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18309 VAR_DOMAIN
, LOC_CONST
,
18310 cu
->language
== language_cplus
18311 ? &objfile
->global_psymbols
18312 : &objfile
->static_psymbols
,
18313 0, cu
->language
, objfile
);
18315 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18319 struct partial_die_info
*part_die
18320 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18322 /* We'll save this DIE so link it in. */
18323 part_die
->die_parent
= parent_die
;
18324 part_die
->die_sibling
= NULL
;
18325 part_die
->die_child
= NULL
;
18327 if (last_die
&& last_die
== parent_die
)
18328 last_die
->die_child
= part_die
;
18330 last_die
->die_sibling
= part_die
;
18332 last_die
= part_die
;
18334 if (first_die
== NULL
)
18335 first_die
= part_die
;
18337 /* Maybe add the DIE to the hash table. Not all DIEs that we
18338 find interesting need to be in the hash table, because we
18339 also have the parent/sibling/child chains; only those that we
18340 might refer to by offset later during partial symbol reading.
18342 For now this means things that might have be the target of a
18343 DW_AT_specification, DW_AT_abstract_origin, or
18344 DW_AT_extension. DW_AT_extension will refer only to
18345 namespaces; DW_AT_abstract_origin refers to functions (and
18346 many things under the function DIE, but we do not recurse
18347 into function DIEs during partial symbol reading) and
18348 possibly variables as well; DW_AT_specification refers to
18349 declarations. Declarations ought to have the DW_AT_declaration
18350 flag. It happens that GCC forgets to put it in sometimes, but
18351 only for functions, not for types.
18353 Adding more things than necessary to the hash table is harmless
18354 except for the performance cost. Adding too few will result in
18355 wasted time in find_partial_die, when we reread the compilation
18356 unit with load_all_dies set. */
18359 || abbrev
->tag
== DW_TAG_constant
18360 || abbrev
->tag
== DW_TAG_subprogram
18361 || abbrev
->tag
== DW_TAG_variable
18362 || abbrev
->tag
== DW_TAG_namespace
18363 || part_die
->is_declaration
)
18367 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18368 to_underlying (part_die
->sect_off
),
18373 /* For some DIEs we want to follow their children (if any). For C
18374 we have no reason to follow the children of structures; for other
18375 languages we have to, so that we can get at method physnames
18376 to infer fully qualified class names, for DW_AT_specification,
18377 and for C++ template arguments. For C++, we also look one level
18378 inside functions to find template arguments (if the name of the
18379 function does not already contain the template arguments).
18381 For Ada, we need to scan the children of subprograms and lexical
18382 blocks as well because Ada allows the definition of nested
18383 entities that could be interesting for the debugger, such as
18384 nested subprograms for instance. */
18385 if (last_die
->has_children
18387 || last_die
->tag
== DW_TAG_namespace
18388 || last_die
->tag
== DW_TAG_module
18389 || last_die
->tag
== DW_TAG_enumeration_type
18390 || (cu
->language
== language_cplus
18391 && last_die
->tag
== DW_TAG_subprogram
18392 && (last_die
->name
== NULL
18393 || strchr (last_die
->name
, '<') == NULL
))
18394 || (cu
->language
!= language_c
18395 && (last_die
->tag
== DW_TAG_class_type
18396 || last_die
->tag
== DW_TAG_interface_type
18397 || last_die
->tag
== DW_TAG_structure_type
18398 || last_die
->tag
== DW_TAG_union_type
))
18399 || (cu
->language
== language_ada
18400 && (last_die
->tag
== DW_TAG_subprogram
18401 || last_die
->tag
== DW_TAG_lexical_block
))))
18404 parent_die
= last_die
;
18408 /* Otherwise we skip to the next sibling, if any. */
18409 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18411 /* Back to the top, do it again. */
18415 partial_die_info::partial_die_info (sect_offset sect_off_
,
18416 struct abbrev_info
*abbrev
)
18417 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18421 /* Read a minimal amount of information into the minimal die structure.
18422 INFO_PTR should point just after the initial uleb128 of a DIE. */
18425 partial_die_info::read (const struct die_reader_specs
*reader
,
18426 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18428 struct dwarf2_cu
*cu
= reader
->cu
;
18429 struct dwarf2_per_objfile
*dwarf2_per_objfile
18430 = cu
->per_cu
->dwarf2_per_objfile
;
18432 int has_low_pc_attr
= 0;
18433 int has_high_pc_attr
= 0;
18434 int high_pc_relative
= 0;
18436 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18438 struct attribute attr
;
18440 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18442 /* Store the data if it is of an attribute we want to keep in a
18443 partial symbol table. */
18449 case DW_TAG_compile_unit
:
18450 case DW_TAG_partial_unit
:
18451 case DW_TAG_type_unit
:
18452 /* Compilation units have a DW_AT_name that is a filename, not
18453 a source language identifier. */
18454 case DW_TAG_enumeration_type
:
18455 case DW_TAG_enumerator
:
18456 /* These tags always have simple identifiers already; no need
18457 to canonicalize them. */
18458 name
= DW_STRING (&attr
);
18462 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18465 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18466 &objfile
->per_bfd
->storage_obstack
);
18471 case DW_AT_linkage_name
:
18472 case DW_AT_MIPS_linkage_name
:
18473 /* Note that both forms of linkage name might appear. We
18474 assume they will be the same, and we only store the last
18476 if (cu
->language
== language_ada
)
18477 name
= DW_STRING (&attr
);
18478 linkage_name
= DW_STRING (&attr
);
18481 has_low_pc_attr
= 1;
18482 lowpc
= attr_value_as_address (&attr
);
18484 case DW_AT_high_pc
:
18485 has_high_pc_attr
= 1;
18486 highpc
= attr_value_as_address (&attr
);
18487 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18488 high_pc_relative
= 1;
18490 case DW_AT_location
:
18491 /* Support the .debug_loc offsets. */
18492 if (attr_form_is_block (&attr
))
18494 d
.locdesc
= DW_BLOCK (&attr
);
18496 else if (attr_form_is_section_offset (&attr
))
18498 dwarf2_complex_location_expr_complaint ();
18502 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18503 "partial symbol information");
18506 case DW_AT_external
:
18507 is_external
= DW_UNSND (&attr
);
18509 case DW_AT_declaration
:
18510 is_declaration
= DW_UNSND (&attr
);
18515 case DW_AT_abstract_origin
:
18516 case DW_AT_specification
:
18517 case DW_AT_extension
:
18518 has_specification
= 1;
18519 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18520 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18521 || cu
->per_cu
->is_dwz
);
18523 case DW_AT_sibling
:
18524 /* Ignore absolute siblings, they might point outside of
18525 the current compile unit. */
18526 if (attr
.form
== DW_FORM_ref_addr
)
18527 complaint (&symfile_complaints
,
18528 _("ignoring absolute DW_AT_sibling"));
18531 const gdb_byte
*buffer
= reader
->buffer
;
18532 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18533 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18535 if (sibling_ptr
< info_ptr
)
18536 complaint (&symfile_complaints
,
18537 _("DW_AT_sibling points backwards"));
18538 else if (sibling_ptr
> reader
->buffer_end
)
18539 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18541 sibling
= sibling_ptr
;
18544 case DW_AT_byte_size
:
18547 case DW_AT_const_value
:
18548 has_const_value
= 1;
18550 case DW_AT_calling_convention
:
18551 /* DWARF doesn't provide a way to identify a program's source-level
18552 entry point. DW_AT_calling_convention attributes are only meant
18553 to describe functions' calling conventions.
18555 However, because it's a necessary piece of information in
18556 Fortran, and before DWARF 4 DW_CC_program was the only
18557 piece of debugging information whose definition refers to
18558 a 'main program' at all, several compilers marked Fortran
18559 main programs with DW_CC_program --- even when those
18560 functions use the standard calling conventions.
18562 Although DWARF now specifies a way to provide this
18563 information, we support this practice for backward
18565 if (DW_UNSND (&attr
) == DW_CC_program
18566 && cu
->language
== language_fortran
)
18567 main_subprogram
= 1;
18570 if (DW_UNSND (&attr
) == DW_INL_inlined
18571 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18572 may_be_inlined
= 1;
18576 if (tag
== DW_TAG_imported_unit
)
18578 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18579 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18580 || cu
->per_cu
->is_dwz
);
18584 case DW_AT_main_subprogram
:
18585 main_subprogram
= DW_UNSND (&attr
);
18593 if (high_pc_relative
)
18596 if (has_low_pc_attr
&& has_high_pc_attr
)
18598 /* When using the GNU linker, .gnu.linkonce. sections are used to
18599 eliminate duplicate copies of functions and vtables and such.
18600 The linker will arbitrarily choose one and discard the others.
18601 The AT_*_pc values for such functions refer to local labels in
18602 these sections. If the section from that file was discarded, the
18603 labels are not in the output, so the relocs get a value of 0.
18604 If this is a discarded function, mark the pc bounds as invalid,
18605 so that GDB will ignore it. */
18606 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18608 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18609 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18611 complaint (&symfile_complaints
,
18612 _("DW_AT_low_pc %s is zero "
18613 "for DIE at %s [in module %s]"),
18614 paddress (gdbarch
, lowpc
),
18615 sect_offset_str (sect_off
),
18616 objfile_name (objfile
));
18618 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18619 else if (lowpc
>= highpc
)
18621 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18622 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18624 complaint (&symfile_complaints
,
18625 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18626 "for DIE at %s [in module %s]"),
18627 paddress (gdbarch
, lowpc
),
18628 paddress (gdbarch
, highpc
),
18629 sect_offset_str (sect_off
),
18630 objfile_name (objfile
));
18639 /* Find a cached partial DIE at OFFSET in CU. */
18641 struct partial_die_info
*
18642 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18644 struct partial_die_info
*lookup_die
= NULL
;
18645 struct partial_die_info
part_die (sect_off
);
18647 lookup_die
= ((struct partial_die_info
*)
18648 htab_find_with_hash (partial_dies
, &part_die
,
18649 to_underlying (sect_off
)));
18654 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18655 except in the case of .debug_types DIEs which do not reference
18656 outside their CU (they do however referencing other types via
18657 DW_FORM_ref_sig8). */
18659 static struct partial_die_info
*
18660 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18662 struct dwarf2_per_objfile
*dwarf2_per_objfile
18663 = cu
->per_cu
->dwarf2_per_objfile
;
18664 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18665 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18666 struct partial_die_info
*pd
= NULL
;
18668 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18669 && offset_in_cu_p (&cu
->header
, sect_off
))
18671 pd
= cu
->find_partial_die (sect_off
);
18674 /* We missed recording what we needed.
18675 Load all dies and try again. */
18676 per_cu
= cu
->per_cu
;
18680 /* TUs don't reference other CUs/TUs (except via type signatures). */
18681 if (cu
->per_cu
->is_debug_types
)
18683 error (_("Dwarf Error: Type Unit at offset %s contains"
18684 " external reference to offset %s [in module %s].\n"),
18685 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18686 bfd_get_filename (objfile
->obfd
));
18688 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18689 dwarf2_per_objfile
);
18691 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18692 load_partial_comp_unit (per_cu
);
18694 per_cu
->cu
->last_used
= 0;
18695 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18698 /* If we didn't find it, and not all dies have been loaded,
18699 load them all and try again. */
18701 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18703 per_cu
->load_all_dies
= 1;
18705 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18706 THIS_CU->cu may already be in use. So we can't just free it and
18707 replace its DIEs with the ones we read in. Instead, we leave those
18708 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18709 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18711 load_partial_comp_unit (per_cu
);
18713 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18717 internal_error (__FILE__
, __LINE__
,
18718 _("could not find partial DIE %s "
18719 "in cache [from module %s]\n"),
18720 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18724 /* See if we can figure out if the class lives in a namespace. We do
18725 this by looking for a member function; its demangled name will
18726 contain namespace info, if there is any. */
18729 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18730 struct dwarf2_cu
*cu
)
18732 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18733 what template types look like, because the demangler
18734 frequently doesn't give the same name as the debug info. We
18735 could fix this by only using the demangled name to get the
18736 prefix (but see comment in read_structure_type). */
18738 struct partial_die_info
*real_pdi
;
18739 struct partial_die_info
*child_pdi
;
18741 /* If this DIE (this DIE's specification, if any) has a parent, then
18742 we should not do this. We'll prepend the parent's fully qualified
18743 name when we create the partial symbol. */
18745 real_pdi
= struct_pdi
;
18746 while (real_pdi
->has_specification
)
18747 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18748 real_pdi
->spec_is_dwz
, cu
);
18750 if (real_pdi
->die_parent
!= NULL
)
18753 for (child_pdi
= struct_pdi
->die_child
;
18755 child_pdi
= child_pdi
->die_sibling
)
18757 if (child_pdi
->tag
== DW_TAG_subprogram
18758 && child_pdi
->linkage_name
!= NULL
)
18760 char *actual_class_name
18761 = language_class_name_from_physname (cu
->language_defn
,
18762 child_pdi
->linkage_name
);
18763 if (actual_class_name
!= NULL
)
18765 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18768 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18770 strlen (actual_class_name
)));
18771 xfree (actual_class_name
);
18779 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18781 /* Once we've fixed up a die, there's no point in doing so again.
18782 This also avoids a memory leak if we were to call
18783 guess_partial_die_structure_name multiple times. */
18787 /* If we found a reference attribute and the DIE has no name, try
18788 to find a name in the referred to DIE. */
18790 if (name
== NULL
&& has_specification
)
18792 struct partial_die_info
*spec_die
;
18794 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18796 spec_die
->fixup (cu
);
18798 if (spec_die
->name
)
18800 name
= spec_die
->name
;
18802 /* Copy DW_AT_external attribute if it is set. */
18803 if (spec_die
->is_external
)
18804 is_external
= spec_die
->is_external
;
18808 /* Set default names for some unnamed DIEs. */
18810 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18811 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18813 /* If there is no parent die to provide a namespace, and there are
18814 children, see if we can determine the namespace from their linkage
18816 if (cu
->language
== language_cplus
18817 && !VEC_empty (dwarf2_section_info_def
,
18818 cu
->per_cu
->dwarf2_per_objfile
->types
)
18819 && die_parent
== NULL
18821 && (tag
== DW_TAG_class_type
18822 || tag
== DW_TAG_structure_type
18823 || tag
== DW_TAG_union_type
))
18824 guess_partial_die_structure_name (this, cu
);
18826 /* GCC might emit a nameless struct or union that has a linkage
18827 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18829 && (tag
== DW_TAG_class_type
18830 || tag
== DW_TAG_interface_type
18831 || tag
== DW_TAG_structure_type
18832 || tag
== DW_TAG_union_type
)
18833 && linkage_name
!= NULL
)
18837 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18842 /* Strip any leading namespaces/classes, keep only the base name.
18843 DW_AT_name for named DIEs does not contain the prefixes. */
18844 base
= strrchr (demangled
, ':');
18845 if (base
&& base
> demangled
&& base
[-1] == ':')
18850 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18853 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18854 base
, strlen (base
)));
18862 /* Read an attribute value described by an attribute form. */
18864 static const gdb_byte
*
18865 read_attribute_value (const struct die_reader_specs
*reader
,
18866 struct attribute
*attr
, unsigned form
,
18867 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18869 struct dwarf2_cu
*cu
= reader
->cu
;
18870 struct dwarf2_per_objfile
*dwarf2_per_objfile
18871 = cu
->per_cu
->dwarf2_per_objfile
;
18872 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18873 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18874 bfd
*abfd
= reader
->abfd
;
18875 struct comp_unit_head
*cu_header
= &cu
->header
;
18876 unsigned int bytes_read
;
18877 struct dwarf_block
*blk
;
18879 attr
->form
= (enum dwarf_form
) form
;
18882 case DW_FORM_ref_addr
:
18883 if (cu
->header
.version
== 2)
18884 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18886 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18887 &cu
->header
, &bytes_read
);
18888 info_ptr
+= bytes_read
;
18890 case DW_FORM_GNU_ref_alt
:
18891 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18892 info_ptr
+= bytes_read
;
18895 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18896 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18897 info_ptr
+= bytes_read
;
18899 case DW_FORM_block2
:
18900 blk
= dwarf_alloc_block (cu
);
18901 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18903 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18904 info_ptr
+= blk
->size
;
18905 DW_BLOCK (attr
) = blk
;
18907 case DW_FORM_block4
:
18908 blk
= dwarf_alloc_block (cu
);
18909 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18911 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18912 info_ptr
+= blk
->size
;
18913 DW_BLOCK (attr
) = blk
;
18915 case DW_FORM_data2
:
18916 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18919 case DW_FORM_data4
:
18920 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18923 case DW_FORM_data8
:
18924 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18927 case DW_FORM_data16
:
18928 blk
= dwarf_alloc_block (cu
);
18930 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18932 DW_BLOCK (attr
) = blk
;
18934 case DW_FORM_sec_offset
:
18935 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18936 info_ptr
+= bytes_read
;
18938 case DW_FORM_string
:
18939 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18940 DW_STRING_IS_CANONICAL (attr
) = 0;
18941 info_ptr
+= bytes_read
;
18944 if (!cu
->per_cu
->is_dwz
)
18946 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18947 abfd
, info_ptr
, cu_header
,
18949 DW_STRING_IS_CANONICAL (attr
) = 0;
18950 info_ptr
+= bytes_read
;
18954 case DW_FORM_line_strp
:
18955 if (!cu
->per_cu
->is_dwz
)
18957 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18959 cu_header
, &bytes_read
);
18960 DW_STRING_IS_CANONICAL (attr
) = 0;
18961 info_ptr
+= bytes_read
;
18965 case DW_FORM_GNU_strp_alt
:
18967 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18968 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18971 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18973 DW_STRING_IS_CANONICAL (attr
) = 0;
18974 info_ptr
+= bytes_read
;
18977 case DW_FORM_exprloc
:
18978 case DW_FORM_block
:
18979 blk
= dwarf_alloc_block (cu
);
18980 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18981 info_ptr
+= bytes_read
;
18982 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18983 info_ptr
+= blk
->size
;
18984 DW_BLOCK (attr
) = blk
;
18986 case DW_FORM_block1
:
18987 blk
= dwarf_alloc_block (cu
);
18988 blk
->size
= read_1_byte (abfd
, info_ptr
);
18990 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18991 info_ptr
+= blk
->size
;
18992 DW_BLOCK (attr
) = blk
;
18994 case DW_FORM_data1
:
18995 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18999 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19002 case DW_FORM_flag_present
:
19003 DW_UNSND (attr
) = 1;
19005 case DW_FORM_sdata
:
19006 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19007 info_ptr
+= bytes_read
;
19009 case DW_FORM_udata
:
19010 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19011 info_ptr
+= bytes_read
;
19014 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19015 + read_1_byte (abfd
, info_ptr
));
19019 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19020 + read_2_bytes (abfd
, info_ptr
));
19024 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19025 + read_4_bytes (abfd
, info_ptr
));
19029 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19030 + read_8_bytes (abfd
, info_ptr
));
19033 case DW_FORM_ref_sig8
:
19034 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19037 case DW_FORM_ref_udata
:
19038 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19039 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19040 info_ptr
+= bytes_read
;
19042 case DW_FORM_indirect
:
19043 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19044 info_ptr
+= bytes_read
;
19045 if (form
== DW_FORM_implicit_const
)
19047 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19048 info_ptr
+= bytes_read
;
19050 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19053 case DW_FORM_implicit_const
:
19054 DW_SND (attr
) = implicit_const
;
19056 case DW_FORM_GNU_addr_index
:
19057 if (reader
->dwo_file
== NULL
)
19059 /* For now flag a hard error.
19060 Later we can turn this into a complaint. */
19061 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19062 dwarf_form_name (form
),
19063 bfd_get_filename (abfd
));
19065 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19066 info_ptr
+= bytes_read
;
19068 case DW_FORM_GNU_str_index
:
19069 if (reader
->dwo_file
== NULL
)
19071 /* For now flag a hard error.
19072 Later we can turn this into a complaint if warranted. */
19073 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19074 dwarf_form_name (form
),
19075 bfd_get_filename (abfd
));
19078 ULONGEST str_index
=
19079 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19081 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19082 DW_STRING_IS_CANONICAL (attr
) = 0;
19083 info_ptr
+= bytes_read
;
19087 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19088 dwarf_form_name (form
),
19089 bfd_get_filename (abfd
));
19093 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19094 attr
->form
= DW_FORM_GNU_ref_alt
;
19096 /* We have seen instances where the compiler tried to emit a byte
19097 size attribute of -1 which ended up being encoded as an unsigned
19098 0xffffffff. Although 0xffffffff is technically a valid size value,
19099 an object of this size seems pretty unlikely so we can relatively
19100 safely treat these cases as if the size attribute was invalid and
19101 treat them as zero by default. */
19102 if (attr
->name
== DW_AT_byte_size
19103 && form
== DW_FORM_data4
19104 && DW_UNSND (attr
) >= 0xffffffff)
19107 (&symfile_complaints
,
19108 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19109 hex_string (DW_UNSND (attr
)));
19110 DW_UNSND (attr
) = 0;
19116 /* Read an attribute described by an abbreviated attribute. */
19118 static const gdb_byte
*
19119 read_attribute (const struct die_reader_specs
*reader
,
19120 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19121 const gdb_byte
*info_ptr
)
19123 attr
->name
= abbrev
->name
;
19124 return read_attribute_value (reader
, attr
, abbrev
->form
,
19125 abbrev
->implicit_const
, info_ptr
);
19128 /* Read dwarf information from a buffer. */
19130 static unsigned int
19131 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19133 return bfd_get_8 (abfd
, buf
);
19137 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19139 return bfd_get_signed_8 (abfd
, buf
);
19142 static unsigned int
19143 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19145 return bfd_get_16 (abfd
, buf
);
19149 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19151 return bfd_get_signed_16 (abfd
, buf
);
19154 static unsigned int
19155 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19157 return bfd_get_32 (abfd
, buf
);
19161 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19163 return bfd_get_signed_32 (abfd
, buf
);
19167 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19169 return bfd_get_64 (abfd
, buf
);
19173 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19174 unsigned int *bytes_read
)
19176 struct comp_unit_head
*cu_header
= &cu
->header
;
19177 CORE_ADDR retval
= 0;
19179 if (cu_header
->signed_addr_p
)
19181 switch (cu_header
->addr_size
)
19184 retval
= bfd_get_signed_16 (abfd
, buf
);
19187 retval
= bfd_get_signed_32 (abfd
, buf
);
19190 retval
= bfd_get_signed_64 (abfd
, buf
);
19193 internal_error (__FILE__
, __LINE__
,
19194 _("read_address: bad switch, signed [in module %s]"),
19195 bfd_get_filename (abfd
));
19200 switch (cu_header
->addr_size
)
19203 retval
= bfd_get_16 (abfd
, buf
);
19206 retval
= bfd_get_32 (abfd
, buf
);
19209 retval
= bfd_get_64 (abfd
, buf
);
19212 internal_error (__FILE__
, __LINE__
,
19213 _("read_address: bad switch, "
19214 "unsigned [in module %s]"),
19215 bfd_get_filename (abfd
));
19219 *bytes_read
= cu_header
->addr_size
;
19223 /* Read the initial length from a section. The (draft) DWARF 3
19224 specification allows the initial length to take up either 4 bytes
19225 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19226 bytes describe the length and all offsets will be 8 bytes in length
19229 An older, non-standard 64-bit format is also handled by this
19230 function. The older format in question stores the initial length
19231 as an 8-byte quantity without an escape value. Lengths greater
19232 than 2^32 aren't very common which means that the initial 4 bytes
19233 is almost always zero. Since a length value of zero doesn't make
19234 sense for the 32-bit format, this initial zero can be considered to
19235 be an escape value which indicates the presence of the older 64-bit
19236 format. As written, the code can't detect (old format) lengths
19237 greater than 4GB. If it becomes necessary to handle lengths
19238 somewhat larger than 4GB, we could allow other small values (such
19239 as the non-sensical values of 1, 2, and 3) to also be used as
19240 escape values indicating the presence of the old format.
19242 The value returned via bytes_read should be used to increment the
19243 relevant pointer after calling read_initial_length().
19245 [ Note: read_initial_length() and read_offset() are based on the
19246 document entitled "DWARF Debugging Information Format", revision
19247 3, draft 8, dated November 19, 2001. This document was obtained
19250 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19252 This document is only a draft and is subject to change. (So beware.)
19254 Details regarding the older, non-standard 64-bit format were
19255 determined empirically by examining 64-bit ELF files produced by
19256 the SGI toolchain on an IRIX 6.5 machine.
19258 - Kevin, July 16, 2002
19262 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19264 LONGEST length
= bfd_get_32 (abfd
, buf
);
19266 if (length
== 0xffffffff)
19268 length
= bfd_get_64 (abfd
, buf
+ 4);
19271 else if (length
== 0)
19273 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19274 length
= bfd_get_64 (abfd
, buf
);
19285 /* Cover function for read_initial_length.
19286 Returns the length of the object at BUF, and stores the size of the
19287 initial length in *BYTES_READ and stores the size that offsets will be in
19289 If the initial length size is not equivalent to that specified in
19290 CU_HEADER then issue a complaint.
19291 This is useful when reading non-comp-unit headers. */
19294 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19295 const struct comp_unit_head
*cu_header
,
19296 unsigned int *bytes_read
,
19297 unsigned int *offset_size
)
19299 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19301 gdb_assert (cu_header
->initial_length_size
== 4
19302 || cu_header
->initial_length_size
== 8
19303 || cu_header
->initial_length_size
== 12);
19305 if (cu_header
->initial_length_size
!= *bytes_read
)
19306 complaint (&symfile_complaints
,
19307 _("intermixed 32-bit and 64-bit DWARF sections"));
19309 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19313 /* Read an offset from the data stream. The size of the offset is
19314 given by cu_header->offset_size. */
19317 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19318 const struct comp_unit_head
*cu_header
,
19319 unsigned int *bytes_read
)
19321 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19323 *bytes_read
= cu_header
->offset_size
;
19327 /* Read an offset from the data stream. */
19330 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19332 LONGEST retval
= 0;
19334 switch (offset_size
)
19337 retval
= bfd_get_32 (abfd
, buf
);
19340 retval
= bfd_get_64 (abfd
, buf
);
19343 internal_error (__FILE__
, __LINE__
,
19344 _("read_offset_1: bad switch [in module %s]"),
19345 bfd_get_filename (abfd
));
19351 static const gdb_byte
*
19352 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19354 /* If the size of a host char is 8 bits, we can return a pointer
19355 to the buffer, otherwise we have to copy the data to a buffer
19356 allocated on the temporary obstack. */
19357 gdb_assert (HOST_CHAR_BIT
== 8);
19361 static const char *
19362 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19363 unsigned int *bytes_read_ptr
)
19365 /* If the size of a host char is 8 bits, we can return a pointer
19366 to the string, otherwise we have to copy the string to a buffer
19367 allocated on the temporary obstack. */
19368 gdb_assert (HOST_CHAR_BIT
== 8);
19371 *bytes_read_ptr
= 1;
19374 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19375 return (const char *) buf
;
19378 /* Return pointer to string at section SECT offset STR_OFFSET with error
19379 reporting strings FORM_NAME and SECT_NAME. */
19381 static const char *
19382 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19383 bfd
*abfd
, LONGEST str_offset
,
19384 struct dwarf2_section_info
*sect
,
19385 const char *form_name
,
19386 const char *sect_name
)
19388 dwarf2_read_section (objfile
, sect
);
19389 if (sect
->buffer
== NULL
)
19390 error (_("%s used without %s section [in module %s]"),
19391 form_name
, sect_name
, bfd_get_filename (abfd
));
19392 if (str_offset
>= sect
->size
)
19393 error (_("%s pointing outside of %s section [in module %s]"),
19394 form_name
, sect_name
, bfd_get_filename (abfd
));
19395 gdb_assert (HOST_CHAR_BIT
== 8);
19396 if (sect
->buffer
[str_offset
] == '\0')
19398 return (const char *) (sect
->buffer
+ str_offset
);
19401 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19403 static const char *
19404 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19405 bfd
*abfd
, LONGEST str_offset
)
19407 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19409 &dwarf2_per_objfile
->str
,
19410 "DW_FORM_strp", ".debug_str");
19413 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19415 static const char *
19416 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19417 bfd
*abfd
, LONGEST str_offset
)
19419 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19421 &dwarf2_per_objfile
->line_str
,
19422 "DW_FORM_line_strp",
19423 ".debug_line_str");
19426 /* Read a string at offset STR_OFFSET in the .debug_str section from
19427 the .dwz file DWZ. Throw an error if the offset is too large. If
19428 the string consists of a single NUL byte, return NULL; otherwise
19429 return a pointer to the string. */
19431 static const char *
19432 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19433 LONGEST str_offset
)
19435 dwarf2_read_section (objfile
, &dwz
->str
);
19437 if (dwz
->str
.buffer
== NULL
)
19438 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19439 "section [in module %s]"),
19440 bfd_get_filename (dwz
->dwz_bfd
));
19441 if (str_offset
>= dwz
->str
.size
)
19442 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19443 ".debug_str section [in module %s]"),
19444 bfd_get_filename (dwz
->dwz_bfd
));
19445 gdb_assert (HOST_CHAR_BIT
== 8);
19446 if (dwz
->str
.buffer
[str_offset
] == '\0')
19448 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19451 /* Return pointer to string at .debug_str offset as read from BUF.
19452 BUF is assumed to be in a compilation unit described by CU_HEADER.
19453 Return *BYTES_READ_PTR count of bytes read from BUF. */
19455 static const char *
19456 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19457 const gdb_byte
*buf
,
19458 const struct comp_unit_head
*cu_header
,
19459 unsigned int *bytes_read_ptr
)
19461 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19463 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19466 /* Return pointer to string at .debug_line_str offset as read from BUF.
19467 BUF is assumed to be in a compilation unit described by CU_HEADER.
19468 Return *BYTES_READ_PTR count of bytes read from BUF. */
19470 static const char *
19471 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19472 bfd
*abfd
, const gdb_byte
*buf
,
19473 const struct comp_unit_head
*cu_header
,
19474 unsigned int *bytes_read_ptr
)
19476 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19478 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19483 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19484 unsigned int *bytes_read_ptr
)
19487 unsigned int num_read
;
19489 unsigned char byte
;
19496 byte
= bfd_get_8 (abfd
, buf
);
19499 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19500 if ((byte
& 128) == 0)
19506 *bytes_read_ptr
= num_read
;
19511 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19512 unsigned int *bytes_read_ptr
)
19515 int shift
, num_read
;
19516 unsigned char byte
;
19523 byte
= bfd_get_8 (abfd
, buf
);
19526 result
|= ((LONGEST
) (byte
& 127) << shift
);
19528 if ((byte
& 128) == 0)
19533 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19534 result
|= -(((LONGEST
) 1) << shift
);
19535 *bytes_read_ptr
= num_read
;
19539 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19540 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19541 ADDR_SIZE is the size of addresses from the CU header. */
19544 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19545 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19547 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19548 bfd
*abfd
= objfile
->obfd
;
19549 const gdb_byte
*info_ptr
;
19551 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19552 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19553 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19554 objfile_name (objfile
));
19555 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19556 error (_("DW_FORM_addr_index pointing outside of "
19557 ".debug_addr section [in module %s]"),
19558 objfile_name (objfile
));
19559 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19560 + addr_base
+ addr_index
* addr_size
);
19561 if (addr_size
== 4)
19562 return bfd_get_32 (abfd
, info_ptr
);
19564 return bfd_get_64 (abfd
, info_ptr
);
19567 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19570 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19572 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19573 cu
->addr_base
, cu
->header
.addr_size
);
19576 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19579 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19580 unsigned int *bytes_read
)
19582 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19583 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19585 return read_addr_index (cu
, addr_index
);
19588 /* Data structure to pass results from dwarf2_read_addr_index_reader
19589 back to dwarf2_read_addr_index. */
19591 struct dwarf2_read_addr_index_data
19593 ULONGEST addr_base
;
19597 /* die_reader_func for dwarf2_read_addr_index. */
19600 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19601 const gdb_byte
*info_ptr
,
19602 struct die_info
*comp_unit_die
,
19606 struct dwarf2_cu
*cu
= reader
->cu
;
19607 struct dwarf2_read_addr_index_data
*aidata
=
19608 (struct dwarf2_read_addr_index_data
*) data
;
19610 aidata
->addr_base
= cu
->addr_base
;
19611 aidata
->addr_size
= cu
->header
.addr_size
;
19614 /* Given an index in .debug_addr, fetch the value.
19615 NOTE: This can be called during dwarf expression evaluation,
19616 long after the debug information has been read, and thus per_cu->cu
19617 may no longer exist. */
19620 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19621 unsigned int addr_index
)
19623 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19624 struct dwarf2_cu
*cu
= per_cu
->cu
;
19625 ULONGEST addr_base
;
19628 /* We need addr_base and addr_size.
19629 If we don't have PER_CU->cu, we have to get it.
19630 Nasty, but the alternative is storing the needed info in PER_CU,
19631 which at this point doesn't seem justified: it's not clear how frequently
19632 it would get used and it would increase the size of every PER_CU.
19633 Entry points like dwarf2_per_cu_addr_size do a similar thing
19634 so we're not in uncharted territory here.
19635 Alas we need to be a bit more complicated as addr_base is contained
19638 We don't need to read the entire CU(/TU).
19639 We just need the header and top level die.
19641 IWBN to use the aging mechanism to let us lazily later discard the CU.
19642 For now we skip this optimization. */
19646 addr_base
= cu
->addr_base
;
19647 addr_size
= cu
->header
.addr_size
;
19651 struct dwarf2_read_addr_index_data aidata
;
19653 /* Note: We can't use init_cutu_and_read_dies_simple here,
19654 we need addr_base. */
19655 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
19656 dwarf2_read_addr_index_reader
, &aidata
);
19657 addr_base
= aidata
.addr_base
;
19658 addr_size
= aidata
.addr_size
;
19661 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19665 /* Given a DW_FORM_GNU_str_index, fetch the string.
19666 This is only used by the Fission support. */
19668 static const char *
19669 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19671 struct dwarf2_cu
*cu
= reader
->cu
;
19672 struct dwarf2_per_objfile
*dwarf2_per_objfile
19673 = cu
->per_cu
->dwarf2_per_objfile
;
19674 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19675 const char *objf_name
= objfile_name (objfile
);
19676 bfd
*abfd
= objfile
->obfd
;
19677 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19678 struct dwarf2_section_info
*str_offsets_section
=
19679 &reader
->dwo_file
->sections
.str_offsets
;
19680 const gdb_byte
*info_ptr
;
19681 ULONGEST str_offset
;
19682 static const char form_name
[] = "DW_FORM_GNU_str_index";
19684 dwarf2_read_section (objfile
, str_section
);
19685 dwarf2_read_section (objfile
, str_offsets_section
);
19686 if (str_section
->buffer
== NULL
)
19687 error (_("%s used without .debug_str.dwo section"
19688 " in CU at offset %s [in module %s]"),
19689 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19690 if (str_offsets_section
->buffer
== NULL
)
19691 error (_("%s used without .debug_str_offsets.dwo section"
19692 " in CU at offset %s [in module %s]"),
19693 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19694 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19695 error (_("%s pointing outside of .debug_str_offsets.dwo"
19696 " section in CU at offset %s [in module %s]"),
19697 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19698 info_ptr
= (str_offsets_section
->buffer
19699 + str_index
* cu
->header
.offset_size
);
19700 if (cu
->header
.offset_size
== 4)
19701 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19703 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19704 if (str_offset
>= str_section
->size
)
19705 error (_("Offset from %s pointing outside of"
19706 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19707 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19708 return (const char *) (str_section
->buffer
+ str_offset
);
19711 /* Return the length of an LEB128 number in BUF. */
19714 leb128_size (const gdb_byte
*buf
)
19716 const gdb_byte
*begin
= buf
;
19722 if ((byte
& 128) == 0)
19723 return buf
- begin
;
19728 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19737 cu
->language
= language_c
;
19740 case DW_LANG_C_plus_plus
:
19741 case DW_LANG_C_plus_plus_11
:
19742 case DW_LANG_C_plus_plus_14
:
19743 cu
->language
= language_cplus
;
19746 cu
->language
= language_d
;
19748 case DW_LANG_Fortran77
:
19749 case DW_LANG_Fortran90
:
19750 case DW_LANG_Fortran95
:
19751 case DW_LANG_Fortran03
:
19752 case DW_LANG_Fortran08
:
19753 cu
->language
= language_fortran
;
19756 cu
->language
= language_go
;
19758 case DW_LANG_Mips_Assembler
:
19759 cu
->language
= language_asm
;
19761 case DW_LANG_Ada83
:
19762 case DW_LANG_Ada95
:
19763 cu
->language
= language_ada
;
19765 case DW_LANG_Modula2
:
19766 cu
->language
= language_m2
;
19768 case DW_LANG_Pascal83
:
19769 cu
->language
= language_pascal
;
19772 cu
->language
= language_objc
;
19775 case DW_LANG_Rust_old
:
19776 cu
->language
= language_rust
;
19778 case DW_LANG_Cobol74
:
19779 case DW_LANG_Cobol85
:
19781 cu
->language
= language_minimal
;
19784 cu
->language_defn
= language_def (cu
->language
);
19787 /* Return the named attribute or NULL if not there. */
19789 static struct attribute
*
19790 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19795 struct attribute
*spec
= NULL
;
19797 for (i
= 0; i
< die
->num_attrs
; ++i
)
19799 if (die
->attrs
[i
].name
== name
)
19800 return &die
->attrs
[i
];
19801 if (die
->attrs
[i
].name
== DW_AT_specification
19802 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19803 spec
= &die
->attrs
[i
];
19809 die
= follow_die_ref (die
, spec
, &cu
);
19815 /* Return the named attribute or NULL if not there,
19816 but do not follow DW_AT_specification, etc.
19817 This is for use in contexts where we're reading .debug_types dies.
19818 Following DW_AT_specification, DW_AT_abstract_origin will take us
19819 back up the chain, and we want to go down. */
19821 static struct attribute
*
19822 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19826 for (i
= 0; i
< die
->num_attrs
; ++i
)
19827 if (die
->attrs
[i
].name
== name
)
19828 return &die
->attrs
[i
];
19833 /* Return the string associated with a string-typed attribute, or NULL if it
19834 is either not found or is of an incorrect type. */
19836 static const char *
19837 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19839 struct attribute
*attr
;
19840 const char *str
= NULL
;
19842 attr
= dwarf2_attr (die
, name
, cu
);
19846 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19847 || attr
->form
== DW_FORM_string
19848 || attr
->form
== DW_FORM_GNU_str_index
19849 || attr
->form
== DW_FORM_GNU_strp_alt
)
19850 str
= DW_STRING (attr
);
19852 complaint (&symfile_complaints
,
19853 _("string type expected for attribute %s for "
19854 "DIE at %s in module %s"),
19855 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19856 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19862 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19863 and holds a non-zero value. This function should only be used for
19864 DW_FORM_flag or DW_FORM_flag_present attributes. */
19867 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19869 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19871 return (attr
&& DW_UNSND (attr
));
19875 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19877 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19878 which value is non-zero. However, we have to be careful with
19879 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19880 (via dwarf2_flag_true_p) follows this attribute. So we may
19881 end up accidently finding a declaration attribute that belongs
19882 to a different DIE referenced by the specification attribute,
19883 even though the given DIE does not have a declaration attribute. */
19884 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19885 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19888 /* Return the die giving the specification for DIE, if there is
19889 one. *SPEC_CU is the CU containing DIE on input, and the CU
19890 containing the return value on output. If there is no
19891 specification, but there is an abstract origin, that is
19894 static struct die_info
*
19895 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19897 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19900 if (spec_attr
== NULL
)
19901 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19903 if (spec_attr
== NULL
)
19906 return follow_die_ref (die
, spec_attr
, spec_cu
);
19909 /* Stub for free_line_header to match void * callback types. */
19912 free_line_header_voidp (void *arg
)
19914 struct line_header
*lh
= (struct line_header
*) arg
;
19920 line_header::add_include_dir (const char *include_dir
)
19922 if (dwarf_line_debug
>= 2)
19923 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19924 include_dirs
.size () + 1, include_dir
);
19926 include_dirs
.push_back (include_dir
);
19930 line_header::add_file_name (const char *name
,
19932 unsigned int mod_time
,
19933 unsigned int length
)
19935 if (dwarf_line_debug
>= 2)
19936 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19937 (unsigned) file_names
.size () + 1, name
);
19939 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19942 /* A convenience function to find the proper .debug_line section for a CU. */
19944 static struct dwarf2_section_info
*
19945 get_debug_line_section (struct dwarf2_cu
*cu
)
19947 struct dwarf2_section_info
*section
;
19948 struct dwarf2_per_objfile
*dwarf2_per_objfile
19949 = cu
->per_cu
->dwarf2_per_objfile
;
19951 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19953 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19954 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19955 else if (cu
->per_cu
->is_dwz
)
19957 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19959 section
= &dwz
->line
;
19962 section
= &dwarf2_per_objfile
->line
;
19967 /* Read directory or file name entry format, starting with byte of
19968 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19969 entries count and the entries themselves in the described entry
19973 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19974 bfd
*abfd
, const gdb_byte
**bufp
,
19975 struct line_header
*lh
,
19976 const struct comp_unit_head
*cu_header
,
19977 void (*callback
) (struct line_header
*lh
,
19980 unsigned int mod_time
,
19981 unsigned int length
))
19983 gdb_byte format_count
, formati
;
19984 ULONGEST data_count
, datai
;
19985 const gdb_byte
*buf
= *bufp
;
19986 const gdb_byte
*format_header_data
;
19987 unsigned int bytes_read
;
19989 format_count
= read_1_byte (abfd
, buf
);
19991 format_header_data
= buf
;
19992 for (formati
= 0; formati
< format_count
; formati
++)
19994 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19996 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20000 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20002 for (datai
= 0; datai
< data_count
; datai
++)
20004 const gdb_byte
*format
= format_header_data
;
20005 struct file_entry fe
;
20007 for (formati
= 0; formati
< format_count
; formati
++)
20009 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20010 format
+= bytes_read
;
20012 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20013 format
+= bytes_read
;
20015 gdb::optional
<const char *> string
;
20016 gdb::optional
<unsigned int> uint
;
20020 case DW_FORM_string
:
20021 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20025 case DW_FORM_line_strp
:
20026 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20033 case DW_FORM_data1
:
20034 uint
.emplace (read_1_byte (abfd
, buf
));
20038 case DW_FORM_data2
:
20039 uint
.emplace (read_2_bytes (abfd
, buf
));
20043 case DW_FORM_data4
:
20044 uint
.emplace (read_4_bytes (abfd
, buf
));
20048 case DW_FORM_data8
:
20049 uint
.emplace (read_8_bytes (abfd
, buf
));
20053 case DW_FORM_udata
:
20054 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20058 case DW_FORM_block
:
20059 /* It is valid only for DW_LNCT_timestamp which is ignored by
20064 switch (content_type
)
20067 if (string
.has_value ())
20070 case DW_LNCT_directory_index
:
20071 if (uint
.has_value ())
20072 fe
.d_index
= (dir_index
) *uint
;
20074 case DW_LNCT_timestamp
:
20075 if (uint
.has_value ())
20076 fe
.mod_time
= *uint
;
20079 if (uint
.has_value ())
20085 complaint (&symfile_complaints
,
20086 _("Unknown format content type %s"),
20087 pulongest (content_type
));
20091 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20097 /* Read the statement program header starting at OFFSET in
20098 .debug_line, or .debug_line.dwo. Return a pointer
20099 to a struct line_header, allocated using xmalloc.
20100 Returns NULL if there is a problem reading the header, e.g., if it
20101 has a version we don't understand.
20103 NOTE: the strings in the include directory and file name tables of
20104 the returned object point into the dwarf line section buffer,
20105 and must not be freed. */
20107 static line_header_up
20108 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20110 const gdb_byte
*line_ptr
;
20111 unsigned int bytes_read
, offset_size
;
20113 const char *cur_dir
, *cur_file
;
20114 struct dwarf2_section_info
*section
;
20116 struct dwarf2_per_objfile
*dwarf2_per_objfile
20117 = cu
->per_cu
->dwarf2_per_objfile
;
20119 section
= get_debug_line_section (cu
);
20120 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20121 if (section
->buffer
== NULL
)
20123 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20124 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20126 complaint (&symfile_complaints
, _("missing .debug_line section"));
20130 /* We can't do this until we know the section is non-empty.
20131 Only then do we know we have such a section. */
20132 abfd
= get_section_bfd_owner (section
);
20134 /* Make sure that at least there's room for the total_length field.
20135 That could be 12 bytes long, but we're just going to fudge that. */
20136 if (to_underlying (sect_off
) + 4 >= section
->size
)
20138 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20142 line_header_up
lh (new line_header ());
20144 lh
->sect_off
= sect_off
;
20145 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20147 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20149 /* Read in the header. */
20151 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20152 &bytes_read
, &offset_size
);
20153 line_ptr
+= bytes_read
;
20154 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20156 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20159 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20160 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20162 if (lh
->version
> 5)
20164 /* This is a version we don't understand. The format could have
20165 changed in ways we don't handle properly so just punt. */
20166 complaint (&symfile_complaints
,
20167 _("unsupported version in .debug_line section"));
20170 if (lh
->version
>= 5)
20172 gdb_byte segment_selector_size
;
20174 /* Skip address size. */
20175 read_1_byte (abfd
, line_ptr
);
20178 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20180 if (segment_selector_size
!= 0)
20182 complaint (&symfile_complaints
,
20183 _("unsupported segment selector size %u "
20184 "in .debug_line section"),
20185 segment_selector_size
);
20189 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20190 line_ptr
+= offset_size
;
20191 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20193 if (lh
->version
>= 4)
20195 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20199 lh
->maximum_ops_per_instruction
= 1;
20201 if (lh
->maximum_ops_per_instruction
== 0)
20203 lh
->maximum_ops_per_instruction
= 1;
20204 complaint (&symfile_complaints
,
20205 _("invalid maximum_ops_per_instruction "
20206 "in `.debug_line' section"));
20209 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20211 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20213 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20215 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20217 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20219 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20220 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20222 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20226 if (lh
->version
>= 5)
20228 /* Read directory table. */
20229 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20231 [] (struct line_header
*lh
, const char *name
,
20232 dir_index d_index
, unsigned int mod_time
,
20233 unsigned int length
)
20235 lh
->add_include_dir (name
);
20238 /* Read file name table. */
20239 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20241 [] (struct line_header
*lh
, const char *name
,
20242 dir_index d_index
, unsigned int mod_time
,
20243 unsigned int length
)
20245 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20250 /* Read directory table. */
20251 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20253 line_ptr
+= bytes_read
;
20254 lh
->add_include_dir (cur_dir
);
20256 line_ptr
+= bytes_read
;
20258 /* Read file name table. */
20259 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20261 unsigned int mod_time
, length
;
20264 line_ptr
+= bytes_read
;
20265 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20266 line_ptr
+= bytes_read
;
20267 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20268 line_ptr
+= bytes_read
;
20269 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20270 line_ptr
+= bytes_read
;
20272 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20274 line_ptr
+= bytes_read
;
20276 lh
->statement_program_start
= line_ptr
;
20278 if (line_ptr
> (section
->buffer
+ section
->size
))
20279 complaint (&symfile_complaints
,
20280 _("line number info header doesn't "
20281 "fit in `.debug_line' section"));
20286 /* Subroutine of dwarf_decode_lines to simplify it.
20287 Return the file name of the psymtab for included file FILE_INDEX
20288 in line header LH of PST.
20289 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20290 If space for the result is malloc'd, *NAME_HOLDER will be set.
20291 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20293 static const char *
20294 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20295 const struct partial_symtab
*pst
,
20296 const char *comp_dir
,
20297 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20299 const file_entry
&fe
= lh
->file_names
[file_index
];
20300 const char *include_name
= fe
.name
;
20301 const char *include_name_to_compare
= include_name
;
20302 const char *pst_filename
;
20305 const char *dir_name
= fe
.include_dir (lh
);
20307 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20308 if (!IS_ABSOLUTE_PATH (include_name
)
20309 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20311 /* Avoid creating a duplicate psymtab for PST.
20312 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20313 Before we do the comparison, however, we need to account
20314 for DIR_NAME and COMP_DIR.
20315 First prepend dir_name (if non-NULL). If we still don't
20316 have an absolute path prepend comp_dir (if non-NULL).
20317 However, the directory we record in the include-file's
20318 psymtab does not contain COMP_DIR (to match the
20319 corresponding symtab(s)).
20324 bash$ gcc -g ./hello.c
20325 include_name = "hello.c"
20327 DW_AT_comp_dir = comp_dir = "/tmp"
20328 DW_AT_name = "./hello.c"
20332 if (dir_name
!= NULL
)
20334 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20335 include_name
, (char *) NULL
));
20336 include_name
= name_holder
->get ();
20337 include_name_to_compare
= include_name
;
20339 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20341 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20342 include_name
, (char *) NULL
));
20343 include_name_to_compare
= hold_compare
.get ();
20347 pst_filename
= pst
->filename
;
20348 gdb::unique_xmalloc_ptr
<char> copied_name
;
20349 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20351 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20352 pst_filename
, (char *) NULL
));
20353 pst_filename
= copied_name
.get ();
20356 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20360 return include_name
;
20363 /* State machine to track the state of the line number program. */
20365 class lnp_state_machine
20368 /* Initialize a machine state for the start of a line number
20370 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20372 file_entry
*current_file ()
20374 /* lh->file_names is 0-based, but the file name numbers in the
20375 statement program are 1-based. */
20376 return m_line_header
->file_name_at (m_file
);
20379 /* Record the line in the state machine. END_SEQUENCE is true if
20380 we're processing the end of a sequence. */
20381 void record_line (bool end_sequence
);
20383 /* Check address and if invalid nop-out the rest of the lines in this
20385 void check_line_address (struct dwarf2_cu
*cu
,
20386 const gdb_byte
*line_ptr
,
20387 CORE_ADDR lowpc
, CORE_ADDR address
);
20389 void handle_set_discriminator (unsigned int discriminator
)
20391 m_discriminator
= discriminator
;
20392 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20395 /* Handle DW_LNE_set_address. */
20396 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20399 address
+= baseaddr
;
20400 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20403 /* Handle DW_LNS_advance_pc. */
20404 void handle_advance_pc (CORE_ADDR adjust
);
20406 /* Handle a special opcode. */
20407 void handle_special_opcode (unsigned char op_code
);
20409 /* Handle DW_LNS_advance_line. */
20410 void handle_advance_line (int line_delta
)
20412 advance_line (line_delta
);
20415 /* Handle DW_LNS_set_file. */
20416 void handle_set_file (file_name_index file
);
20418 /* Handle DW_LNS_negate_stmt. */
20419 void handle_negate_stmt ()
20421 m_is_stmt
= !m_is_stmt
;
20424 /* Handle DW_LNS_const_add_pc. */
20425 void handle_const_add_pc ();
20427 /* Handle DW_LNS_fixed_advance_pc. */
20428 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20430 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20434 /* Handle DW_LNS_copy. */
20435 void handle_copy ()
20437 record_line (false);
20438 m_discriminator
= 0;
20441 /* Handle DW_LNE_end_sequence. */
20442 void handle_end_sequence ()
20444 m_record_line_callback
= ::record_line
;
20448 /* Advance the line by LINE_DELTA. */
20449 void advance_line (int line_delta
)
20451 m_line
+= line_delta
;
20453 if (line_delta
!= 0)
20454 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20457 gdbarch
*m_gdbarch
;
20459 /* True if we're recording lines.
20460 Otherwise we're building partial symtabs and are just interested in
20461 finding include files mentioned by the line number program. */
20462 bool m_record_lines_p
;
20464 /* The line number header. */
20465 line_header
*m_line_header
;
20467 /* These are part of the standard DWARF line number state machine,
20468 and initialized according to the DWARF spec. */
20470 unsigned char m_op_index
= 0;
20471 /* The line table index (1-based) of the current file. */
20472 file_name_index m_file
= (file_name_index
) 1;
20473 unsigned int m_line
= 1;
20475 /* These are initialized in the constructor. */
20477 CORE_ADDR m_address
;
20479 unsigned int m_discriminator
;
20481 /* Additional bits of state we need to track. */
20483 /* The last file that we called dwarf2_start_subfile for.
20484 This is only used for TLLs. */
20485 unsigned int m_last_file
= 0;
20486 /* The last file a line number was recorded for. */
20487 struct subfile
*m_last_subfile
= NULL
;
20489 /* The function to call to record a line. */
20490 record_line_ftype
*m_record_line_callback
= NULL
;
20492 /* The last line number that was recorded, used to coalesce
20493 consecutive entries for the same line. This can happen, for
20494 example, when discriminators are present. PR 17276. */
20495 unsigned int m_last_line
= 0;
20496 bool m_line_has_non_zero_discriminator
= false;
20500 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20502 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20503 / m_line_header
->maximum_ops_per_instruction
)
20504 * m_line_header
->minimum_instruction_length
);
20505 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20506 m_op_index
= ((m_op_index
+ adjust
)
20507 % m_line_header
->maximum_ops_per_instruction
);
20511 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20513 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20514 CORE_ADDR addr_adj
= (((m_op_index
20515 + (adj_opcode
/ m_line_header
->line_range
))
20516 / m_line_header
->maximum_ops_per_instruction
)
20517 * m_line_header
->minimum_instruction_length
);
20518 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20519 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20520 % m_line_header
->maximum_ops_per_instruction
);
20522 int line_delta
= (m_line_header
->line_base
20523 + (adj_opcode
% m_line_header
->line_range
));
20524 advance_line (line_delta
);
20525 record_line (false);
20526 m_discriminator
= 0;
20530 lnp_state_machine::handle_set_file (file_name_index file
)
20534 const file_entry
*fe
= current_file ();
20536 dwarf2_debug_line_missing_file_complaint ();
20537 else if (m_record_lines_p
)
20539 const char *dir
= fe
->include_dir (m_line_header
);
20541 m_last_subfile
= current_subfile
;
20542 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20543 dwarf2_start_subfile (fe
->name
, dir
);
20548 lnp_state_machine::handle_const_add_pc ()
20551 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20554 = (((m_op_index
+ adjust
)
20555 / m_line_header
->maximum_ops_per_instruction
)
20556 * m_line_header
->minimum_instruction_length
);
20558 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20559 m_op_index
= ((m_op_index
+ adjust
)
20560 % m_line_header
->maximum_ops_per_instruction
);
20563 /* Ignore this record_line request. */
20566 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20571 /* Return non-zero if we should add LINE to the line number table.
20572 LINE is the line to add, LAST_LINE is the last line that was added,
20573 LAST_SUBFILE is the subfile for LAST_LINE.
20574 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20575 had a non-zero discriminator.
20577 We have to be careful in the presence of discriminators.
20578 E.g., for this line:
20580 for (i = 0; i < 100000; i++);
20582 clang can emit four line number entries for that one line,
20583 each with a different discriminator.
20584 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20586 However, we want gdb to coalesce all four entries into one.
20587 Otherwise the user could stepi into the middle of the line and
20588 gdb would get confused about whether the pc really was in the
20589 middle of the line.
20591 Things are further complicated by the fact that two consecutive
20592 line number entries for the same line is a heuristic used by gcc
20593 to denote the end of the prologue. So we can't just discard duplicate
20594 entries, we have to be selective about it. The heuristic we use is
20595 that we only collapse consecutive entries for the same line if at least
20596 one of those entries has a non-zero discriminator. PR 17276.
20598 Note: Addresses in the line number state machine can never go backwards
20599 within one sequence, thus this coalescing is ok. */
20602 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20603 int line_has_non_zero_discriminator
,
20604 struct subfile
*last_subfile
)
20606 if (current_subfile
!= last_subfile
)
20608 if (line
!= last_line
)
20610 /* Same line for the same file that we've seen already.
20611 As a last check, for pr 17276, only record the line if the line
20612 has never had a non-zero discriminator. */
20613 if (!line_has_non_zero_discriminator
)
20618 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20619 in the line table of subfile SUBFILE. */
20622 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20623 unsigned int line
, CORE_ADDR address
,
20624 record_line_ftype p_record_line
)
20626 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20628 if (dwarf_line_debug
)
20630 fprintf_unfiltered (gdb_stdlog
,
20631 "Recording line %u, file %s, address %s\n",
20632 line
, lbasename (subfile
->name
),
20633 paddress (gdbarch
, address
));
20636 (*p_record_line
) (subfile
, line
, addr
);
20639 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20640 Mark the end of a set of line number records.
20641 The arguments are the same as for dwarf_record_line_1.
20642 If SUBFILE is NULL the request is ignored. */
20645 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20646 CORE_ADDR address
, record_line_ftype p_record_line
)
20648 if (subfile
== NULL
)
20651 if (dwarf_line_debug
)
20653 fprintf_unfiltered (gdb_stdlog
,
20654 "Finishing current line, file %s, address %s\n",
20655 lbasename (subfile
->name
),
20656 paddress (gdbarch
, address
));
20659 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20663 lnp_state_machine::record_line (bool end_sequence
)
20665 if (dwarf_line_debug
)
20667 fprintf_unfiltered (gdb_stdlog
,
20668 "Processing actual line %u: file %u,"
20669 " address %s, is_stmt %u, discrim %u\n",
20670 m_line
, to_underlying (m_file
),
20671 paddress (m_gdbarch
, m_address
),
20672 m_is_stmt
, m_discriminator
);
20675 file_entry
*fe
= current_file ();
20678 dwarf2_debug_line_missing_file_complaint ();
20679 /* For now we ignore lines not starting on an instruction boundary.
20680 But not when processing end_sequence for compatibility with the
20681 previous version of the code. */
20682 else if (m_op_index
== 0 || end_sequence
)
20684 fe
->included_p
= 1;
20685 if (m_record_lines_p
&& m_is_stmt
)
20687 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20689 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20690 m_address
, m_record_line_callback
);
20695 if (dwarf_record_line_p (m_line
, m_last_line
,
20696 m_line_has_non_zero_discriminator
,
20699 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20701 m_record_line_callback
);
20703 m_last_subfile
= current_subfile
;
20704 m_last_line
= m_line
;
20710 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20711 bool record_lines_p
)
20714 m_record_lines_p
= record_lines_p
;
20715 m_line_header
= lh
;
20717 m_record_line_callback
= ::record_line
;
20719 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20720 was a line entry for it so that the backend has a chance to adjust it
20721 and also record it in case it needs it. This is currently used by MIPS
20722 code, cf. `mips_adjust_dwarf2_line'. */
20723 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20724 m_is_stmt
= lh
->default_is_stmt
;
20725 m_discriminator
= 0;
20729 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20730 const gdb_byte
*line_ptr
,
20731 CORE_ADDR lowpc
, CORE_ADDR address
)
20733 /* If address < lowpc then it's not a usable value, it's outside the
20734 pc range of the CU. However, we restrict the test to only address
20735 values of zero to preserve GDB's previous behaviour which is to
20736 handle the specific case of a function being GC'd by the linker. */
20738 if (address
== 0 && address
< lowpc
)
20740 /* This line table is for a function which has been
20741 GCd by the linker. Ignore it. PR gdb/12528 */
20743 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20744 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20746 complaint (&symfile_complaints
,
20747 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20748 line_offset
, objfile_name (objfile
));
20749 m_record_line_callback
= noop_record_line
;
20750 /* Note: record_line_callback is left as noop_record_line until
20751 we see DW_LNE_end_sequence. */
20755 /* Subroutine of dwarf_decode_lines to simplify it.
20756 Process the line number information in LH.
20757 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20758 program in order to set included_p for every referenced header. */
20761 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20762 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20764 const gdb_byte
*line_ptr
, *extended_end
;
20765 const gdb_byte
*line_end
;
20766 unsigned int bytes_read
, extended_len
;
20767 unsigned char op_code
, extended_op
;
20768 CORE_ADDR baseaddr
;
20769 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20770 bfd
*abfd
= objfile
->obfd
;
20771 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20772 /* True if we're recording line info (as opposed to building partial
20773 symtabs and just interested in finding include files mentioned by
20774 the line number program). */
20775 bool record_lines_p
= !decode_for_pst_p
;
20777 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20779 line_ptr
= lh
->statement_program_start
;
20780 line_end
= lh
->statement_program_end
;
20782 /* Read the statement sequences until there's nothing left. */
20783 while (line_ptr
< line_end
)
20785 /* The DWARF line number program state machine. Reset the state
20786 machine at the start of each sequence. */
20787 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20788 bool end_sequence
= false;
20790 if (record_lines_p
)
20792 /* Start a subfile for the current file of the state
20794 const file_entry
*fe
= state_machine
.current_file ();
20797 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20800 /* Decode the table. */
20801 while (line_ptr
< line_end
&& !end_sequence
)
20803 op_code
= read_1_byte (abfd
, line_ptr
);
20806 if (op_code
>= lh
->opcode_base
)
20808 /* Special opcode. */
20809 state_machine
.handle_special_opcode (op_code
);
20811 else switch (op_code
)
20813 case DW_LNS_extended_op
:
20814 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20816 line_ptr
+= bytes_read
;
20817 extended_end
= line_ptr
+ extended_len
;
20818 extended_op
= read_1_byte (abfd
, line_ptr
);
20820 switch (extended_op
)
20822 case DW_LNE_end_sequence
:
20823 state_machine
.handle_end_sequence ();
20824 end_sequence
= true;
20826 case DW_LNE_set_address
:
20829 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20830 line_ptr
+= bytes_read
;
20832 state_machine
.check_line_address (cu
, line_ptr
,
20834 state_machine
.handle_set_address (baseaddr
, address
);
20837 case DW_LNE_define_file
:
20839 const char *cur_file
;
20840 unsigned int mod_time
, length
;
20843 cur_file
= read_direct_string (abfd
, line_ptr
,
20845 line_ptr
+= bytes_read
;
20846 dindex
= (dir_index
)
20847 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20848 line_ptr
+= bytes_read
;
20850 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20851 line_ptr
+= bytes_read
;
20853 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20854 line_ptr
+= bytes_read
;
20855 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20858 case DW_LNE_set_discriminator
:
20860 /* The discriminator is not interesting to the
20861 debugger; just ignore it. We still need to
20862 check its value though:
20863 if there are consecutive entries for the same
20864 (non-prologue) line we want to coalesce them.
20867 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20868 line_ptr
+= bytes_read
;
20870 state_machine
.handle_set_discriminator (discr
);
20874 complaint (&symfile_complaints
,
20875 _("mangled .debug_line section"));
20878 /* Make sure that we parsed the extended op correctly. If e.g.
20879 we expected a different address size than the producer used,
20880 we may have read the wrong number of bytes. */
20881 if (line_ptr
!= extended_end
)
20883 complaint (&symfile_complaints
,
20884 _("mangled .debug_line section"));
20889 state_machine
.handle_copy ();
20891 case DW_LNS_advance_pc
:
20894 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20895 line_ptr
+= bytes_read
;
20897 state_machine
.handle_advance_pc (adjust
);
20900 case DW_LNS_advance_line
:
20903 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20904 line_ptr
+= bytes_read
;
20906 state_machine
.handle_advance_line (line_delta
);
20909 case DW_LNS_set_file
:
20911 file_name_index file
20912 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20914 line_ptr
+= bytes_read
;
20916 state_machine
.handle_set_file (file
);
20919 case DW_LNS_set_column
:
20920 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20921 line_ptr
+= bytes_read
;
20923 case DW_LNS_negate_stmt
:
20924 state_machine
.handle_negate_stmt ();
20926 case DW_LNS_set_basic_block
:
20928 /* Add to the address register of the state machine the
20929 address increment value corresponding to special opcode
20930 255. I.e., this value is scaled by the minimum
20931 instruction length since special opcode 255 would have
20932 scaled the increment. */
20933 case DW_LNS_const_add_pc
:
20934 state_machine
.handle_const_add_pc ();
20936 case DW_LNS_fixed_advance_pc
:
20938 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20941 state_machine
.handle_fixed_advance_pc (addr_adj
);
20946 /* Unknown standard opcode, ignore it. */
20949 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20951 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20952 line_ptr
+= bytes_read
;
20959 dwarf2_debug_line_missing_end_sequence_complaint ();
20961 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20962 in which case we still finish recording the last line). */
20963 state_machine
.record_line (true);
20967 /* Decode the Line Number Program (LNP) for the given line_header
20968 structure and CU. The actual information extracted and the type
20969 of structures created from the LNP depends on the value of PST.
20971 1. If PST is NULL, then this procedure uses the data from the program
20972 to create all necessary symbol tables, and their linetables.
20974 2. If PST is not NULL, this procedure reads the program to determine
20975 the list of files included by the unit represented by PST, and
20976 builds all the associated partial symbol tables.
20978 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20979 It is used for relative paths in the line table.
20980 NOTE: When processing partial symtabs (pst != NULL),
20981 comp_dir == pst->dirname.
20983 NOTE: It is important that psymtabs have the same file name (via strcmp)
20984 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20985 symtab we don't use it in the name of the psymtabs we create.
20986 E.g. expand_line_sal requires this when finding psymtabs to expand.
20987 A good testcase for this is mb-inline.exp.
20989 LOWPC is the lowest address in CU (or 0 if not known).
20991 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20992 for its PC<->lines mapping information. Otherwise only the filename
20993 table is read in. */
20996 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20997 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
20998 CORE_ADDR lowpc
, int decode_mapping
)
21000 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21001 const int decode_for_pst_p
= (pst
!= NULL
);
21003 if (decode_mapping
)
21004 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21006 if (decode_for_pst_p
)
21010 /* Now that we're done scanning the Line Header Program, we can
21011 create the psymtab of each included file. */
21012 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21013 if (lh
->file_names
[file_index
].included_p
== 1)
21015 gdb::unique_xmalloc_ptr
<char> name_holder
;
21016 const char *include_name
=
21017 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21019 if (include_name
!= NULL
)
21020 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21025 /* Make sure a symtab is created for every file, even files
21026 which contain only variables (i.e. no code with associated
21028 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
21031 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21033 file_entry
&fe
= lh
->file_names
[i
];
21035 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
21037 if (current_subfile
->symtab
== NULL
)
21039 current_subfile
->symtab
21040 = allocate_symtab (cust
, current_subfile
->name
);
21042 fe
.symtab
= current_subfile
->symtab
;
21047 /* Start a subfile for DWARF. FILENAME is the name of the file and
21048 DIRNAME the name of the source directory which contains FILENAME
21049 or NULL if not known.
21050 This routine tries to keep line numbers from identical absolute and
21051 relative file names in a common subfile.
21053 Using the `list' example from the GDB testsuite, which resides in
21054 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21055 of /srcdir/list0.c yields the following debugging information for list0.c:
21057 DW_AT_name: /srcdir/list0.c
21058 DW_AT_comp_dir: /compdir
21059 files.files[0].name: list0.h
21060 files.files[0].dir: /srcdir
21061 files.files[1].name: list0.c
21062 files.files[1].dir: /srcdir
21064 The line number information for list0.c has to end up in a single
21065 subfile, so that `break /srcdir/list0.c:1' works as expected.
21066 start_subfile will ensure that this happens provided that we pass the
21067 concatenation of files.files[1].dir and files.files[1].name as the
21071 dwarf2_start_subfile (const char *filename
, const char *dirname
)
21075 /* In order not to lose the line information directory,
21076 we concatenate it to the filename when it makes sense.
21077 Note that the Dwarf3 standard says (speaking of filenames in line
21078 information): ``The directory index is ignored for file names
21079 that represent full path names''. Thus ignoring dirname in the
21080 `else' branch below isn't an issue. */
21082 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21084 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21088 start_subfile (filename
);
21094 /* Start a symtab for DWARF.
21095 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21097 static struct compunit_symtab
*
21098 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21099 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21101 struct compunit_symtab
*cust
21102 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21103 low_pc
, cu
->language
);
21105 record_debugformat ("DWARF 2");
21106 record_producer (cu
->producer
);
21108 /* We assume that we're processing GCC output. */
21109 processing_gcc_compilation
= 2;
21111 cu
->processing_has_namespace_info
= 0;
21117 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21118 struct dwarf2_cu
*cu
)
21120 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21121 struct comp_unit_head
*cu_header
= &cu
->header
;
21123 /* NOTE drow/2003-01-30: There used to be a comment and some special
21124 code here to turn a symbol with DW_AT_external and a
21125 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21126 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21127 with some versions of binutils) where shared libraries could have
21128 relocations against symbols in their debug information - the
21129 minimal symbol would have the right address, but the debug info
21130 would not. It's no longer necessary, because we will explicitly
21131 apply relocations when we read in the debug information now. */
21133 /* A DW_AT_location attribute with no contents indicates that a
21134 variable has been optimized away. */
21135 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21137 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21141 /* Handle one degenerate form of location expression specially, to
21142 preserve GDB's previous behavior when section offsets are
21143 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21144 then mark this symbol as LOC_STATIC. */
21146 if (attr_form_is_block (attr
)
21147 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21148 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21149 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21150 && (DW_BLOCK (attr
)->size
21151 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21153 unsigned int dummy
;
21155 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21156 SYMBOL_VALUE_ADDRESS (sym
) =
21157 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21159 SYMBOL_VALUE_ADDRESS (sym
) =
21160 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21161 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21162 fixup_symbol_section (sym
, objfile
);
21163 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21164 SYMBOL_SECTION (sym
));
21168 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21169 expression evaluator, and use LOC_COMPUTED only when necessary
21170 (i.e. when the value of a register or memory location is
21171 referenced, or a thread-local block, etc.). Then again, it might
21172 not be worthwhile. I'm assuming that it isn't unless performance
21173 or memory numbers show me otherwise. */
21175 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21177 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21178 cu
->has_loclist
= 1;
21181 /* Given a pointer to a DWARF information entry, figure out if we need
21182 to make a symbol table entry for it, and if so, create a new entry
21183 and return a pointer to it.
21184 If TYPE is NULL, determine symbol type from the die, otherwise
21185 used the passed type.
21186 If SPACE is not NULL, use it to hold the new symbol. If it is
21187 NULL, allocate a new symbol on the objfile's obstack. */
21189 static struct symbol
*
21190 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21191 struct symbol
*space
)
21193 struct dwarf2_per_objfile
*dwarf2_per_objfile
21194 = cu
->per_cu
->dwarf2_per_objfile
;
21195 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21196 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21197 struct symbol
*sym
= NULL
;
21199 struct attribute
*attr
= NULL
;
21200 struct attribute
*attr2
= NULL
;
21201 CORE_ADDR baseaddr
;
21202 struct pending
**list_to_add
= NULL
;
21204 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21206 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21208 name
= dwarf2_name (die
, cu
);
21211 const char *linkagename
;
21212 int suppress_add
= 0;
21217 sym
= allocate_symbol (objfile
);
21218 OBJSTAT (objfile
, n_syms
++);
21220 /* Cache this symbol's name and the name's demangled form (if any). */
21221 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21222 linkagename
= dwarf2_physname (name
, die
, cu
);
21223 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21225 /* Fortran does not have mangling standard and the mangling does differ
21226 between gfortran, iFort etc. */
21227 if (cu
->language
== language_fortran
21228 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21229 symbol_set_demangled_name (&(sym
->ginfo
),
21230 dwarf2_full_name (name
, die
, cu
),
21233 /* Default assumptions.
21234 Use the passed type or decode it from the die. */
21235 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21236 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21238 SYMBOL_TYPE (sym
) = type
;
21240 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21241 attr
= dwarf2_attr (die
,
21242 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21246 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21249 attr
= dwarf2_attr (die
,
21250 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21254 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21255 struct file_entry
*fe
;
21257 if (cu
->line_header
!= NULL
)
21258 fe
= cu
->line_header
->file_name_at (file_index
);
21263 complaint (&symfile_complaints
,
21264 _("file index out of range"));
21266 symbol_set_symtab (sym
, fe
->symtab
);
21272 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21277 addr
= attr_value_as_address (attr
);
21278 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21279 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21281 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21282 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21283 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21284 add_symbol_to_list (sym
, cu
->list_in_scope
);
21286 case DW_TAG_subprogram
:
21287 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21289 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21290 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21291 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21292 || cu
->language
== language_ada
)
21294 /* Subprograms marked external are stored as a global symbol.
21295 Ada subprograms, whether marked external or not, are always
21296 stored as a global symbol, because we want to be able to
21297 access them globally. For instance, we want to be able
21298 to break on a nested subprogram without having to
21299 specify the context. */
21300 list_to_add
= &global_symbols
;
21304 list_to_add
= cu
->list_in_scope
;
21307 case DW_TAG_inlined_subroutine
:
21308 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21310 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21311 SYMBOL_INLINED (sym
) = 1;
21312 list_to_add
= cu
->list_in_scope
;
21314 case DW_TAG_template_value_param
:
21316 /* Fall through. */
21317 case DW_TAG_constant
:
21318 case DW_TAG_variable
:
21319 case DW_TAG_member
:
21320 /* Compilation with minimal debug info may result in
21321 variables with missing type entries. Change the
21322 misleading `void' type to something sensible. */
21323 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21324 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21326 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21327 /* In the case of DW_TAG_member, we should only be called for
21328 static const members. */
21329 if (die
->tag
== DW_TAG_member
)
21331 /* dwarf2_add_field uses die_is_declaration,
21332 so we do the same. */
21333 gdb_assert (die_is_declaration (die
, cu
));
21338 dwarf2_const_value (attr
, sym
, cu
);
21339 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21342 if (attr2
&& (DW_UNSND (attr2
) != 0))
21343 list_to_add
= &global_symbols
;
21345 list_to_add
= cu
->list_in_scope
;
21349 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21352 var_decode_location (attr
, sym
, cu
);
21353 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21355 /* Fortran explicitly imports any global symbols to the local
21356 scope by DW_TAG_common_block. */
21357 if (cu
->language
== language_fortran
&& die
->parent
21358 && die
->parent
->tag
== DW_TAG_common_block
)
21361 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21362 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21363 && !dwarf2_per_objfile
->has_section_at_zero
)
21365 /* When a static variable is eliminated by the linker,
21366 the corresponding debug information is not stripped
21367 out, but the variable address is set to null;
21368 do not add such variables into symbol table. */
21370 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21372 /* Workaround gfortran PR debug/40040 - it uses
21373 DW_AT_location for variables in -fPIC libraries which may
21374 get overriden by other libraries/executable and get
21375 a different address. Resolve it by the minimal symbol
21376 which may come from inferior's executable using copy
21377 relocation. Make this workaround only for gfortran as for
21378 other compilers GDB cannot guess the minimal symbol
21379 Fortran mangling kind. */
21380 if (cu
->language
== language_fortran
&& die
->parent
21381 && die
->parent
->tag
== DW_TAG_module
21383 && startswith (cu
->producer
, "GNU Fortran"))
21384 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21386 /* A variable with DW_AT_external is never static,
21387 but it may be block-scoped. */
21388 list_to_add
= (cu
->list_in_scope
== &file_symbols
21389 ? &global_symbols
: cu
->list_in_scope
);
21392 list_to_add
= cu
->list_in_scope
;
21396 /* We do not know the address of this symbol.
21397 If it is an external symbol and we have type information
21398 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21399 The address of the variable will then be determined from
21400 the minimal symbol table whenever the variable is
21402 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21404 /* Fortran explicitly imports any global symbols to the local
21405 scope by DW_TAG_common_block. */
21406 if (cu
->language
== language_fortran
&& die
->parent
21407 && die
->parent
->tag
== DW_TAG_common_block
)
21409 /* SYMBOL_CLASS doesn't matter here because
21410 read_common_block is going to reset it. */
21412 list_to_add
= cu
->list_in_scope
;
21414 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21415 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21417 /* A variable with DW_AT_external is never static, but it
21418 may be block-scoped. */
21419 list_to_add
= (cu
->list_in_scope
== &file_symbols
21420 ? &global_symbols
: cu
->list_in_scope
);
21422 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21424 else if (!die_is_declaration (die
, cu
))
21426 /* Use the default LOC_OPTIMIZED_OUT class. */
21427 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21429 list_to_add
= cu
->list_in_scope
;
21433 case DW_TAG_formal_parameter
:
21434 /* If we are inside a function, mark this as an argument. If
21435 not, we might be looking at an argument to an inlined function
21436 when we do not have enough information to show inlined frames;
21437 pretend it's a local variable in that case so that the user can
21439 if (context_stack_depth
> 0
21440 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21441 SYMBOL_IS_ARGUMENT (sym
) = 1;
21442 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21445 var_decode_location (attr
, sym
, cu
);
21447 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21450 dwarf2_const_value (attr
, sym
, cu
);
21453 list_to_add
= cu
->list_in_scope
;
21455 case DW_TAG_unspecified_parameters
:
21456 /* From varargs functions; gdb doesn't seem to have any
21457 interest in this information, so just ignore it for now.
21460 case DW_TAG_template_type_param
:
21462 /* Fall through. */
21463 case DW_TAG_class_type
:
21464 case DW_TAG_interface_type
:
21465 case DW_TAG_structure_type
:
21466 case DW_TAG_union_type
:
21467 case DW_TAG_set_type
:
21468 case DW_TAG_enumeration_type
:
21469 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21470 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21473 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21474 really ever be static objects: otherwise, if you try
21475 to, say, break of a class's method and you're in a file
21476 which doesn't mention that class, it won't work unless
21477 the check for all static symbols in lookup_symbol_aux
21478 saves you. See the OtherFileClass tests in
21479 gdb.c++/namespace.exp. */
21483 list_to_add
= (cu
->list_in_scope
== &file_symbols
21484 && cu
->language
== language_cplus
21485 ? &global_symbols
: cu
->list_in_scope
);
21487 /* The semantics of C++ state that "struct foo {
21488 ... }" also defines a typedef for "foo". */
21489 if (cu
->language
== language_cplus
21490 || cu
->language
== language_ada
21491 || cu
->language
== language_d
21492 || cu
->language
== language_rust
)
21494 /* The symbol's name is already allocated along
21495 with this objfile, so we don't need to
21496 duplicate it for the type. */
21497 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21498 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21503 case DW_TAG_typedef
:
21504 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21505 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21506 list_to_add
= cu
->list_in_scope
;
21508 case DW_TAG_base_type
:
21509 case DW_TAG_subrange_type
:
21510 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21511 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21512 list_to_add
= cu
->list_in_scope
;
21514 case DW_TAG_enumerator
:
21515 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21518 dwarf2_const_value (attr
, sym
, cu
);
21521 /* NOTE: carlton/2003-11-10: See comment above in the
21522 DW_TAG_class_type, etc. block. */
21524 list_to_add
= (cu
->list_in_scope
== &file_symbols
21525 && cu
->language
== language_cplus
21526 ? &global_symbols
: cu
->list_in_scope
);
21529 case DW_TAG_imported_declaration
:
21530 case DW_TAG_namespace
:
21531 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21532 list_to_add
= &global_symbols
;
21534 case DW_TAG_module
:
21535 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21536 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21537 list_to_add
= &global_symbols
;
21539 case DW_TAG_common_block
:
21540 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21541 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21542 add_symbol_to_list (sym
, cu
->list_in_scope
);
21545 /* Not a tag we recognize. Hopefully we aren't processing
21546 trash data, but since we must specifically ignore things
21547 we don't recognize, there is nothing else we should do at
21549 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21550 dwarf_tag_name (die
->tag
));
21556 sym
->hash_next
= objfile
->template_symbols
;
21557 objfile
->template_symbols
= sym
;
21558 list_to_add
= NULL
;
21561 if (list_to_add
!= NULL
)
21562 add_symbol_to_list (sym
, list_to_add
);
21564 /* For the benefit of old versions of GCC, check for anonymous
21565 namespaces based on the demangled name. */
21566 if (!cu
->processing_has_namespace_info
21567 && cu
->language
== language_cplus
)
21568 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21573 /* Given an attr with a DW_FORM_dataN value in host byte order,
21574 zero-extend it as appropriate for the symbol's type. The DWARF
21575 standard (v4) is not entirely clear about the meaning of using
21576 DW_FORM_dataN for a constant with a signed type, where the type is
21577 wider than the data. The conclusion of a discussion on the DWARF
21578 list was that this is unspecified. We choose to always zero-extend
21579 because that is the interpretation long in use by GCC. */
21582 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21583 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21585 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21586 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21587 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21588 LONGEST l
= DW_UNSND (attr
);
21590 if (bits
< sizeof (*value
) * 8)
21592 l
&= ((LONGEST
) 1 << bits
) - 1;
21595 else if (bits
== sizeof (*value
) * 8)
21599 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21600 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21607 /* Read a constant value from an attribute. Either set *VALUE, or if
21608 the value does not fit in *VALUE, set *BYTES - either already
21609 allocated on the objfile obstack, or newly allocated on OBSTACK,
21610 or, set *BATON, if we translated the constant to a location
21614 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21615 const char *name
, struct obstack
*obstack
,
21616 struct dwarf2_cu
*cu
,
21617 LONGEST
*value
, const gdb_byte
**bytes
,
21618 struct dwarf2_locexpr_baton
**baton
)
21620 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21621 struct comp_unit_head
*cu_header
= &cu
->header
;
21622 struct dwarf_block
*blk
;
21623 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21624 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21630 switch (attr
->form
)
21633 case DW_FORM_GNU_addr_index
:
21637 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21638 dwarf2_const_value_length_mismatch_complaint (name
,
21639 cu_header
->addr_size
,
21640 TYPE_LENGTH (type
));
21641 /* Symbols of this form are reasonably rare, so we just
21642 piggyback on the existing location code rather than writing
21643 a new implementation of symbol_computed_ops. */
21644 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21645 (*baton
)->per_cu
= cu
->per_cu
;
21646 gdb_assert ((*baton
)->per_cu
);
21648 (*baton
)->size
= 2 + cu_header
->addr_size
;
21649 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21650 (*baton
)->data
= data
;
21652 data
[0] = DW_OP_addr
;
21653 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21654 byte_order
, DW_ADDR (attr
));
21655 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21658 case DW_FORM_string
:
21660 case DW_FORM_GNU_str_index
:
21661 case DW_FORM_GNU_strp_alt
:
21662 /* DW_STRING is already allocated on the objfile obstack, point
21664 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21666 case DW_FORM_block1
:
21667 case DW_FORM_block2
:
21668 case DW_FORM_block4
:
21669 case DW_FORM_block
:
21670 case DW_FORM_exprloc
:
21671 case DW_FORM_data16
:
21672 blk
= DW_BLOCK (attr
);
21673 if (TYPE_LENGTH (type
) != blk
->size
)
21674 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21675 TYPE_LENGTH (type
));
21676 *bytes
= blk
->data
;
21679 /* The DW_AT_const_value attributes are supposed to carry the
21680 symbol's value "represented as it would be on the target
21681 architecture." By the time we get here, it's already been
21682 converted to host endianness, so we just need to sign- or
21683 zero-extend it as appropriate. */
21684 case DW_FORM_data1
:
21685 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21687 case DW_FORM_data2
:
21688 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21690 case DW_FORM_data4
:
21691 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21693 case DW_FORM_data8
:
21694 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21697 case DW_FORM_sdata
:
21698 case DW_FORM_implicit_const
:
21699 *value
= DW_SND (attr
);
21702 case DW_FORM_udata
:
21703 *value
= DW_UNSND (attr
);
21707 complaint (&symfile_complaints
,
21708 _("unsupported const value attribute form: '%s'"),
21709 dwarf_form_name (attr
->form
));
21716 /* Copy constant value from an attribute to a symbol. */
21719 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21720 struct dwarf2_cu
*cu
)
21722 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21724 const gdb_byte
*bytes
;
21725 struct dwarf2_locexpr_baton
*baton
;
21727 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21728 SYMBOL_PRINT_NAME (sym
),
21729 &objfile
->objfile_obstack
, cu
,
21730 &value
, &bytes
, &baton
);
21734 SYMBOL_LOCATION_BATON (sym
) = baton
;
21735 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21737 else if (bytes
!= NULL
)
21739 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21740 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21744 SYMBOL_VALUE (sym
) = value
;
21745 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21749 /* Return the type of the die in question using its DW_AT_type attribute. */
21751 static struct type
*
21752 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21754 struct attribute
*type_attr
;
21756 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21759 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21760 /* A missing DW_AT_type represents a void type. */
21761 return objfile_type (objfile
)->builtin_void
;
21764 return lookup_die_type (die
, type_attr
, cu
);
21767 /* True iff CU's producer generates GNAT Ada auxiliary information
21768 that allows to find parallel types through that information instead
21769 of having to do expensive parallel lookups by type name. */
21772 need_gnat_info (struct dwarf2_cu
*cu
)
21774 /* Assume that the Ada compiler was GNAT, which always produces
21775 the auxiliary information. */
21776 return (cu
->language
== language_ada
);
21779 /* Return the auxiliary type of the die in question using its
21780 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21781 attribute is not present. */
21783 static struct type
*
21784 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21786 struct attribute
*type_attr
;
21788 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21792 return lookup_die_type (die
, type_attr
, cu
);
21795 /* If DIE has a descriptive_type attribute, then set the TYPE's
21796 descriptive type accordingly. */
21799 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21800 struct dwarf2_cu
*cu
)
21802 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21804 if (descriptive_type
)
21806 ALLOCATE_GNAT_AUX_TYPE (type
);
21807 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21811 /* Return the containing type of the die in question using its
21812 DW_AT_containing_type attribute. */
21814 static struct type
*
21815 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21817 struct attribute
*type_attr
;
21818 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21820 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21822 error (_("Dwarf Error: Problem turning containing type into gdb type "
21823 "[in module %s]"), objfile_name (objfile
));
21825 return lookup_die_type (die
, type_attr
, cu
);
21828 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21830 static struct type
*
21831 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21833 struct dwarf2_per_objfile
*dwarf2_per_objfile
21834 = cu
->per_cu
->dwarf2_per_objfile
;
21835 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21836 char *message
, *saved
;
21838 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21839 objfile_name (objfile
),
21840 sect_offset_str (cu
->header
.sect_off
),
21841 sect_offset_str (die
->sect_off
));
21842 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21843 message
, strlen (message
));
21846 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21849 /* Look up the type of DIE in CU using its type attribute ATTR.
21850 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21851 DW_AT_containing_type.
21852 If there is no type substitute an error marker. */
21854 static struct type
*
21855 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21856 struct dwarf2_cu
*cu
)
21858 struct dwarf2_per_objfile
*dwarf2_per_objfile
21859 = cu
->per_cu
->dwarf2_per_objfile
;
21860 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21861 struct type
*this_type
;
21863 gdb_assert (attr
->name
== DW_AT_type
21864 || attr
->name
== DW_AT_GNAT_descriptive_type
21865 || attr
->name
== DW_AT_containing_type
);
21867 /* First see if we have it cached. */
21869 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21871 struct dwarf2_per_cu_data
*per_cu
;
21872 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21874 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21875 dwarf2_per_objfile
);
21876 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21878 else if (attr_form_is_ref (attr
))
21880 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21882 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21884 else if (attr
->form
== DW_FORM_ref_sig8
)
21886 ULONGEST signature
= DW_SIGNATURE (attr
);
21888 return get_signatured_type (die
, signature
, cu
);
21892 complaint (&symfile_complaints
,
21893 _("Dwarf Error: Bad type attribute %s in DIE"
21894 " at %s [in module %s]"),
21895 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21896 objfile_name (objfile
));
21897 return build_error_marker_type (cu
, die
);
21900 /* If not cached we need to read it in. */
21902 if (this_type
== NULL
)
21904 struct die_info
*type_die
= NULL
;
21905 struct dwarf2_cu
*type_cu
= cu
;
21907 if (attr_form_is_ref (attr
))
21908 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21909 if (type_die
== NULL
)
21910 return build_error_marker_type (cu
, die
);
21911 /* If we find the type now, it's probably because the type came
21912 from an inter-CU reference and the type's CU got expanded before
21914 this_type
= read_type_die (type_die
, type_cu
);
21917 /* If we still don't have a type use an error marker. */
21919 if (this_type
== NULL
)
21920 return build_error_marker_type (cu
, die
);
21925 /* Return the type in DIE, CU.
21926 Returns NULL for invalid types.
21928 This first does a lookup in die_type_hash,
21929 and only reads the die in if necessary.
21931 NOTE: This can be called when reading in partial or full symbols. */
21933 static struct type
*
21934 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21936 struct type
*this_type
;
21938 this_type
= get_die_type (die
, cu
);
21942 return read_type_die_1 (die
, cu
);
21945 /* Read the type in DIE, CU.
21946 Returns NULL for invalid types. */
21948 static struct type
*
21949 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21951 struct type
*this_type
= NULL
;
21955 case DW_TAG_class_type
:
21956 case DW_TAG_interface_type
:
21957 case DW_TAG_structure_type
:
21958 case DW_TAG_union_type
:
21959 this_type
= read_structure_type (die
, cu
);
21961 case DW_TAG_enumeration_type
:
21962 this_type
= read_enumeration_type (die
, cu
);
21964 case DW_TAG_subprogram
:
21965 case DW_TAG_subroutine_type
:
21966 case DW_TAG_inlined_subroutine
:
21967 this_type
= read_subroutine_type (die
, cu
);
21969 case DW_TAG_array_type
:
21970 this_type
= read_array_type (die
, cu
);
21972 case DW_TAG_set_type
:
21973 this_type
= read_set_type (die
, cu
);
21975 case DW_TAG_pointer_type
:
21976 this_type
= read_tag_pointer_type (die
, cu
);
21978 case DW_TAG_ptr_to_member_type
:
21979 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21981 case DW_TAG_reference_type
:
21982 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21984 case DW_TAG_rvalue_reference_type
:
21985 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21987 case DW_TAG_const_type
:
21988 this_type
= read_tag_const_type (die
, cu
);
21990 case DW_TAG_volatile_type
:
21991 this_type
= read_tag_volatile_type (die
, cu
);
21993 case DW_TAG_restrict_type
:
21994 this_type
= read_tag_restrict_type (die
, cu
);
21996 case DW_TAG_string_type
:
21997 this_type
= read_tag_string_type (die
, cu
);
21999 case DW_TAG_typedef
:
22000 this_type
= read_typedef (die
, cu
);
22002 case DW_TAG_subrange_type
:
22003 this_type
= read_subrange_type (die
, cu
);
22005 case DW_TAG_base_type
:
22006 this_type
= read_base_type (die
, cu
);
22008 case DW_TAG_unspecified_type
:
22009 this_type
= read_unspecified_type (die
, cu
);
22011 case DW_TAG_namespace
:
22012 this_type
= read_namespace_type (die
, cu
);
22014 case DW_TAG_module
:
22015 this_type
= read_module_type (die
, cu
);
22017 case DW_TAG_atomic_type
:
22018 this_type
= read_tag_atomic_type (die
, cu
);
22021 complaint (&symfile_complaints
,
22022 _("unexpected tag in read_type_die: '%s'"),
22023 dwarf_tag_name (die
->tag
));
22030 /* See if we can figure out if the class lives in a namespace. We do
22031 this by looking for a member function; its demangled name will
22032 contain namespace info, if there is any.
22033 Return the computed name or NULL.
22034 Space for the result is allocated on the objfile's obstack.
22035 This is the full-die version of guess_partial_die_structure_name.
22036 In this case we know DIE has no useful parent. */
22039 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22041 struct die_info
*spec_die
;
22042 struct dwarf2_cu
*spec_cu
;
22043 struct die_info
*child
;
22044 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22047 spec_die
= die_specification (die
, &spec_cu
);
22048 if (spec_die
!= NULL
)
22054 for (child
= die
->child
;
22056 child
= child
->sibling
)
22058 if (child
->tag
== DW_TAG_subprogram
)
22060 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22062 if (linkage_name
!= NULL
)
22065 = language_class_name_from_physname (cu
->language_defn
,
22069 if (actual_name
!= NULL
)
22071 const char *die_name
= dwarf2_name (die
, cu
);
22073 if (die_name
!= NULL
22074 && strcmp (die_name
, actual_name
) != 0)
22076 /* Strip off the class name from the full name.
22077 We want the prefix. */
22078 int die_name_len
= strlen (die_name
);
22079 int actual_name_len
= strlen (actual_name
);
22081 /* Test for '::' as a sanity check. */
22082 if (actual_name_len
> die_name_len
+ 2
22083 && actual_name
[actual_name_len
22084 - die_name_len
- 1] == ':')
22085 name
= (char *) obstack_copy0 (
22086 &objfile
->per_bfd
->storage_obstack
,
22087 actual_name
, actual_name_len
- die_name_len
- 2);
22090 xfree (actual_name
);
22099 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22100 prefix part in such case. See
22101 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22103 static const char *
22104 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22106 struct attribute
*attr
;
22109 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22110 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22113 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22116 attr
= dw2_linkage_name_attr (die
, cu
);
22117 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22120 /* dwarf2_name had to be already called. */
22121 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22123 /* Strip the base name, keep any leading namespaces/classes. */
22124 base
= strrchr (DW_STRING (attr
), ':');
22125 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22128 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22129 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22131 &base
[-1] - DW_STRING (attr
));
22134 /* Return the name of the namespace/class that DIE is defined within,
22135 or "" if we can't tell. The caller should not xfree the result.
22137 For example, if we're within the method foo() in the following
22147 then determine_prefix on foo's die will return "N::C". */
22149 static const char *
22150 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22152 struct dwarf2_per_objfile
*dwarf2_per_objfile
22153 = cu
->per_cu
->dwarf2_per_objfile
;
22154 struct die_info
*parent
, *spec_die
;
22155 struct dwarf2_cu
*spec_cu
;
22156 struct type
*parent_type
;
22157 const char *retval
;
22159 if (cu
->language
!= language_cplus
22160 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22161 && cu
->language
!= language_rust
)
22164 retval
= anonymous_struct_prefix (die
, cu
);
22168 /* We have to be careful in the presence of DW_AT_specification.
22169 For example, with GCC 3.4, given the code
22173 // Definition of N::foo.
22177 then we'll have a tree of DIEs like this:
22179 1: DW_TAG_compile_unit
22180 2: DW_TAG_namespace // N
22181 3: DW_TAG_subprogram // declaration of N::foo
22182 4: DW_TAG_subprogram // definition of N::foo
22183 DW_AT_specification // refers to die #3
22185 Thus, when processing die #4, we have to pretend that we're in
22186 the context of its DW_AT_specification, namely the contex of die
22189 spec_die
= die_specification (die
, &spec_cu
);
22190 if (spec_die
== NULL
)
22191 parent
= die
->parent
;
22194 parent
= spec_die
->parent
;
22198 if (parent
== NULL
)
22200 else if (parent
->building_fullname
)
22203 const char *parent_name
;
22205 /* It has been seen on RealView 2.2 built binaries,
22206 DW_TAG_template_type_param types actually _defined_ as
22207 children of the parent class:
22210 template class <class Enum> Class{};
22211 Class<enum E> class_e;
22213 1: DW_TAG_class_type (Class)
22214 2: DW_TAG_enumeration_type (E)
22215 3: DW_TAG_enumerator (enum1:0)
22216 3: DW_TAG_enumerator (enum2:1)
22218 2: DW_TAG_template_type_param
22219 DW_AT_type DW_FORM_ref_udata (E)
22221 Besides being broken debug info, it can put GDB into an
22222 infinite loop. Consider:
22224 When we're building the full name for Class<E>, we'll start
22225 at Class, and go look over its template type parameters,
22226 finding E. We'll then try to build the full name of E, and
22227 reach here. We're now trying to build the full name of E,
22228 and look over the parent DIE for containing scope. In the
22229 broken case, if we followed the parent DIE of E, we'd again
22230 find Class, and once again go look at its template type
22231 arguments, etc., etc. Simply don't consider such parent die
22232 as source-level parent of this die (it can't be, the language
22233 doesn't allow it), and break the loop here. */
22234 name
= dwarf2_name (die
, cu
);
22235 parent_name
= dwarf2_name (parent
, cu
);
22236 complaint (&symfile_complaints
,
22237 _("template param type '%s' defined within parent '%s'"),
22238 name
? name
: "<unknown>",
22239 parent_name
? parent_name
: "<unknown>");
22243 switch (parent
->tag
)
22245 case DW_TAG_namespace
:
22246 parent_type
= read_type_die (parent
, cu
);
22247 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22248 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22249 Work around this problem here. */
22250 if (cu
->language
== language_cplus
22251 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22253 /* We give a name to even anonymous namespaces. */
22254 return TYPE_TAG_NAME (parent_type
);
22255 case DW_TAG_class_type
:
22256 case DW_TAG_interface_type
:
22257 case DW_TAG_structure_type
:
22258 case DW_TAG_union_type
:
22259 case DW_TAG_module
:
22260 parent_type
= read_type_die (parent
, cu
);
22261 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22262 return TYPE_TAG_NAME (parent_type
);
22264 /* An anonymous structure is only allowed non-static data
22265 members; no typedefs, no member functions, et cetera.
22266 So it does not need a prefix. */
22268 case DW_TAG_compile_unit
:
22269 case DW_TAG_partial_unit
:
22270 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22271 if (cu
->language
== language_cplus
22272 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22273 && die
->child
!= NULL
22274 && (die
->tag
== DW_TAG_class_type
22275 || die
->tag
== DW_TAG_structure_type
22276 || die
->tag
== DW_TAG_union_type
))
22278 char *name
= guess_full_die_structure_name (die
, cu
);
22283 case DW_TAG_enumeration_type
:
22284 parent_type
= read_type_die (parent
, cu
);
22285 if (TYPE_DECLARED_CLASS (parent_type
))
22287 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22288 return TYPE_TAG_NAME (parent_type
);
22291 /* Fall through. */
22293 return determine_prefix (parent
, cu
);
22297 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22298 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22299 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22300 an obconcat, otherwise allocate storage for the result. The CU argument is
22301 used to determine the language and hence, the appropriate separator. */
22303 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22306 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22307 int physname
, struct dwarf2_cu
*cu
)
22309 const char *lead
= "";
22312 if (suffix
== NULL
|| suffix
[0] == '\0'
22313 || prefix
== NULL
|| prefix
[0] == '\0')
22315 else if (cu
->language
== language_d
)
22317 /* For D, the 'main' function could be defined in any module, but it
22318 should never be prefixed. */
22319 if (strcmp (suffix
, "D main") == 0)
22327 else if (cu
->language
== language_fortran
&& physname
)
22329 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22330 DW_AT_MIPS_linkage_name is preferred and used instead. */
22338 if (prefix
== NULL
)
22340 if (suffix
== NULL
)
22347 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22349 strcpy (retval
, lead
);
22350 strcat (retval
, prefix
);
22351 strcat (retval
, sep
);
22352 strcat (retval
, suffix
);
22357 /* We have an obstack. */
22358 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22362 /* Return sibling of die, NULL if no sibling. */
22364 static struct die_info
*
22365 sibling_die (struct die_info
*die
)
22367 return die
->sibling
;
22370 /* Get name of a die, return NULL if not found. */
22372 static const char *
22373 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22374 struct obstack
*obstack
)
22376 if (name
&& cu
->language
== language_cplus
)
22378 std::string canon_name
= cp_canonicalize_string (name
);
22380 if (!canon_name
.empty ())
22382 if (canon_name
!= name
)
22383 name
= (const char *) obstack_copy0 (obstack
,
22384 canon_name
.c_str (),
22385 canon_name
.length ());
22392 /* Get name of a die, return NULL if not found.
22393 Anonymous namespaces are converted to their magic string. */
22395 static const char *
22396 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22398 struct attribute
*attr
;
22399 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22401 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22402 if ((!attr
|| !DW_STRING (attr
))
22403 && die
->tag
!= DW_TAG_namespace
22404 && die
->tag
!= DW_TAG_class_type
22405 && die
->tag
!= DW_TAG_interface_type
22406 && die
->tag
!= DW_TAG_structure_type
22407 && die
->tag
!= DW_TAG_union_type
)
22412 case DW_TAG_compile_unit
:
22413 case DW_TAG_partial_unit
:
22414 /* Compilation units have a DW_AT_name that is a filename, not
22415 a source language identifier. */
22416 case DW_TAG_enumeration_type
:
22417 case DW_TAG_enumerator
:
22418 /* These tags always have simple identifiers already; no need
22419 to canonicalize them. */
22420 return DW_STRING (attr
);
22422 case DW_TAG_namespace
:
22423 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22424 return DW_STRING (attr
);
22425 return CP_ANONYMOUS_NAMESPACE_STR
;
22427 case DW_TAG_class_type
:
22428 case DW_TAG_interface_type
:
22429 case DW_TAG_structure_type
:
22430 case DW_TAG_union_type
:
22431 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22432 structures or unions. These were of the form "._%d" in GCC 4.1,
22433 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22434 and GCC 4.4. We work around this problem by ignoring these. */
22435 if (attr
&& DW_STRING (attr
)
22436 && (startswith (DW_STRING (attr
), "._")
22437 || startswith (DW_STRING (attr
), "<anonymous")))
22440 /* GCC might emit a nameless typedef that has a linkage name. See
22441 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22442 if (!attr
|| DW_STRING (attr
) == NULL
)
22444 char *demangled
= NULL
;
22446 attr
= dw2_linkage_name_attr (die
, cu
);
22447 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22450 /* Avoid demangling DW_STRING (attr) the second time on a second
22451 call for the same DIE. */
22452 if (!DW_STRING_IS_CANONICAL (attr
))
22453 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22459 /* FIXME: we already did this for the partial symbol... */
22462 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22463 demangled
, strlen (demangled
)));
22464 DW_STRING_IS_CANONICAL (attr
) = 1;
22467 /* Strip any leading namespaces/classes, keep only the base name.
22468 DW_AT_name for named DIEs does not contain the prefixes. */
22469 base
= strrchr (DW_STRING (attr
), ':');
22470 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22473 return DW_STRING (attr
);
22482 if (!DW_STRING_IS_CANONICAL (attr
))
22485 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22486 &objfile
->per_bfd
->storage_obstack
);
22487 DW_STRING_IS_CANONICAL (attr
) = 1;
22489 return DW_STRING (attr
);
22492 /* Return the die that this die in an extension of, or NULL if there
22493 is none. *EXT_CU is the CU containing DIE on input, and the CU
22494 containing the return value on output. */
22496 static struct die_info
*
22497 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22499 struct attribute
*attr
;
22501 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22505 return follow_die_ref (die
, attr
, ext_cu
);
22508 /* Convert a DIE tag into its string name. */
22510 static const char *
22511 dwarf_tag_name (unsigned tag
)
22513 const char *name
= get_DW_TAG_name (tag
);
22516 return "DW_TAG_<unknown>";
22521 /* Convert a DWARF attribute code into its string name. */
22523 static const char *
22524 dwarf_attr_name (unsigned attr
)
22528 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22529 if (attr
== DW_AT_MIPS_fde
)
22530 return "DW_AT_MIPS_fde";
22532 if (attr
== DW_AT_HP_block_index
)
22533 return "DW_AT_HP_block_index";
22536 name
= get_DW_AT_name (attr
);
22539 return "DW_AT_<unknown>";
22544 /* Convert a DWARF value form code into its string name. */
22546 static const char *
22547 dwarf_form_name (unsigned form
)
22549 const char *name
= get_DW_FORM_name (form
);
22552 return "DW_FORM_<unknown>";
22557 static const char *
22558 dwarf_bool_name (unsigned mybool
)
22566 /* Convert a DWARF type code into its string name. */
22568 static const char *
22569 dwarf_type_encoding_name (unsigned enc
)
22571 const char *name
= get_DW_ATE_name (enc
);
22574 return "DW_ATE_<unknown>";
22580 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22584 print_spaces (indent
, f
);
22585 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22586 dwarf_tag_name (die
->tag
), die
->abbrev
,
22587 sect_offset_str (die
->sect_off
));
22589 if (die
->parent
!= NULL
)
22591 print_spaces (indent
, f
);
22592 fprintf_unfiltered (f
, " parent at offset: %s\n",
22593 sect_offset_str (die
->parent
->sect_off
));
22596 print_spaces (indent
, f
);
22597 fprintf_unfiltered (f
, " has children: %s\n",
22598 dwarf_bool_name (die
->child
!= NULL
));
22600 print_spaces (indent
, f
);
22601 fprintf_unfiltered (f
, " attributes:\n");
22603 for (i
= 0; i
< die
->num_attrs
; ++i
)
22605 print_spaces (indent
, f
);
22606 fprintf_unfiltered (f
, " %s (%s) ",
22607 dwarf_attr_name (die
->attrs
[i
].name
),
22608 dwarf_form_name (die
->attrs
[i
].form
));
22610 switch (die
->attrs
[i
].form
)
22613 case DW_FORM_GNU_addr_index
:
22614 fprintf_unfiltered (f
, "address: ");
22615 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22617 case DW_FORM_block2
:
22618 case DW_FORM_block4
:
22619 case DW_FORM_block
:
22620 case DW_FORM_block1
:
22621 fprintf_unfiltered (f
, "block: size %s",
22622 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22624 case DW_FORM_exprloc
:
22625 fprintf_unfiltered (f
, "expression: size %s",
22626 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22628 case DW_FORM_data16
:
22629 fprintf_unfiltered (f
, "constant of 16 bytes");
22631 case DW_FORM_ref_addr
:
22632 fprintf_unfiltered (f
, "ref address: ");
22633 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22635 case DW_FORM_GNU_ref_alt
:
22636 fprintf_unfiltered (f
, "alt ref address: ");
22637 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22643 case DW_FORM_ref_udata
:
22644 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22645 (long) (DW_UNSND (&die
->attrs
[i
])));
22647 case DW_FORM_data1
:
22648 case DW_FORM_data2
:
22649 case DW_FORM_data4
:
22650 case DW_FORM_data8
:
22651 case DW_FORM_udata
:
22652 case DW_FORM_sdata
:
22653 fprintf_unfiltered (f
, "constant: %s",
22654 pulongest (DW_UNSND (&die
->attrs
[i
])));
22656 case DW_FORM_sec_offset
:
22657 fprintf_unfiltered (f
, "section offset: %s",
22658 pulongest (DW_UNSND (&die
->attrs
[i
])));
22660 case DW_FORM_ref_sig8
:
22661 fprintf_unfiltered (f
, "signature: %s",
22662 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22664 case DW_FORM_string
:
22666 case DW_FORM_line_strp
:
22667 case DW_FORM_GNU_str_index
:
22668 case DW_FORM_GNU_strp_alt
:
22669 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22670 DW_STRING (&die
->attrs
[i
])
22671 ? DW_STRING (&die
->attrs
[i
]) : "",
22672 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22675 if (DW_UNSND (&die
->attrs
[i
]))
22676 fprintf_unfiltered (f
, "flag: TRUE");
22678 fprintf_unfiltered (f
, "flag: FALSE");
22680 case DW_FORM_flag_present
:
22681 fprintf_unfiltered (f
, "flag: TRUE");
22683 case DW_FORM_indirect
:
22684 /* The reader will have reduced the indirect form to
22685 the "base form" so this form should not occur. */
22686 fprintf_unfiltered (f
,
22687 "unexpected attribute form: DW_FORM_indirect");
22689 case DW_FORM_implicit_const
:
22690 fprintf_unfiltered (f
, "constant: %s",
22691 plongest (DW_SND (&die
->attrs
[i
])));
22694 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22695 die
->attrs
[i
].form
);
22698 fprintf_unfiltered (f
, "\n");
22703 dump_die_for_error (struct die_info
*die
)
22705 dump_die_shallow (gdb_stderr
, 0, die
);
22709 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22711 int indent
= level
* 4;
22713 gdb_assert (die
!= NULL
);
22715 if (level
>= max_level
)
22718 dump_die_shallow (f
, indent
, die
);
22720 if (die
->child
!= NULL
)
22722 print_spaces (indent
, f
);
22723 fprintf_unfiltered (f
, " Children:");
22724 if (level
+ 1 < max_level
)
22726 fprintf_unfiltered (f
, "\n");
22727 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22731 fprintf_unfiltered (f
,
22732 " [not printed, max nesting level reached]\n");
22736 if (die
->sibling
!= NULL
&& level
> 0)
22738 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22742 /* This is called from the pdie macro in gdbinit.in.
22743 It's not static so gcc will keep a copy callable from gdb. */
22746 dump_die (struct die_info
*die
, int max_level
)
22748 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22752 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22756 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22757 to_underlying (die
->sect_off
),
22763 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22767 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22769 if (attr_form_is_ref (attr
))
22770 return (sect_offset
) DW_UNSND (attr
);
22772 complaint (&symfile_complaints
,
22773 _("unsupported die ref attribute form: '%s'"),
22774 dwarf_form_name (attr
->form
));
22778 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22779 * the value held by the attribute is not constant. */
22782 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22784 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22785 return DW_SND (attr
);
22786 else if (attr
->form
== DW_FORM_udata
22787 || attr
->form
== DW_FORM_data1
22788 || attr
->form
== DW_FORM_data2
22789 || attr
->form
== DW_FORM_data4
22790 || attr
->form
== DW_FORM_data8
)
22791 return DW_UNSND (attr
);
22794 /* For DW_FORM_data16 see attr_form_is_constant. */
22795 complaint (&symfile_complaints
,
22796 _("Attribute value is not a constant (%s)"),
22797 dwarf_form_name (attr
->form
));
22798 return default_value
;
22802 /* Follow reference or signature attribute ATTR of SRC_DIE.
22803 On entry *REF_CU is the CU of SRC_DIE.
22804 On exit *REF_CU is the CU of the result. */
22806 static struct die_info
*
22807 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22808 struct dwarf2_cu
**ref_cu
)
22810 struct die_info
*die
;
22812 if (attr_form_is_ref (attr
))
22813 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22814 else if (attr
->form
== DW_FORM_ref_sig8
)
22815 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22818 dump_die_for_error (src_die
);
22819 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22820 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22826 /* Follow reference OFFSET.
22827 On entry *REF_CU is the CU of the source die referencing OFFSET.
22828 On exit *REF_CU is the CU of the result.
22829 Returns NULL if OFFSET is invalid. */
22831 static struct die_info
*
22832 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22833 struct dwarf2_cu
**ref_cu
)
22835 struct die_info temp_die
;
22836 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22837 struct dwarf2_per_objfile
*dwarf2_per_objfile
22838 = cu
->per_cu
->dwarf2_per_objfile
;
22840 gdb_assert (cu
->per_cu
!= NULL
);
22844 if (cu
->per_cu
->is_debug_types
)
22846 /* .debug_types CUs cannot reference anything outside their CU.
22847 If they need to, they have to reference a signatured type via
22848 DW_FORM_ref_sig8. */
22849 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22852 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22853 || !offset_in_cu_p (&cu
->header
, sect_off
))
22855 struct dwarf2_per_cu_data
*per_cu
;
22857 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22858 dwarf2_per_objfile
);
22860 /* If necessary, add it to the queue and load its DIEs. */
22861 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22862 load_full_comp_unit (per_cu
, cu
->language
);
22864 target_cu
= per_cu
->cu
;
22866 else if (cu
->dies
== NULL
)
22868 /* We're loading full DIEs during partial symbol reading. */
22869 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22870 load_full_comp_unit (cu
->per_cu
, language_minimal
);
22873 *ref_cu
= target_cu
;
22874 temp_die
.sect_off
= sect_off
;
22875 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22877 to_underlying (sect_off
));
22880 /* Follow reference attribute ATTR of SRC_DIE.
22881 On entry *REF_CU is the CU of SRC_DIE.
22882 On exit *REF_CU is the CU of the result. */
22884 static struct die_info
*
22885 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22886 struct dwarf2_cu
**ref_cu
)
22888 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22889 struct dwarf2_cu
*cu
= *ref_cu
;
22890 struct die_info
*die
;
22892 die
= follow_die_offset (sect_off
,
22893 (attr
->form
== DW_FORM_GNU_ref_alt
22894 || cu
->per_cu
->is_dwz
),
22897 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22898 "at %s [in module %s]"),
22899 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22900 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22905 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22906 Returned value is intended for DW_OP_call*. Returned
22907 dwarf2_locexpr_baton->data has lifetime of
22908 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22910 struct dwarf2_locexpr_baton
22911 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22912 struct dwarf2_per_cu_data
*per_cu
,
22913 CORE_ADDR (*get_frame_pc
) (void *baton
),
22916 struct dwarf2_cu
*cu
;
22917 struct die_info
*die
;
22918 struct attribute
*attr
;
22919 struct dwarf2_locexpr_baton retval
;
22920 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22921 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22923 if (per_cu
->cu
== NULL
)
22928 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22929 Instead just throw an error, not much else we can do. */
22930 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22931 sect_offset_str (sect_off
), objfile_name (objfile
));
22934 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22936 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22937 sect_offset_str (sect_off
), objfile_name (objfile
));
22939 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22942 /* DWARF: "If there is no such attribute, then there is no effect.".
22943 DATA is ignored if SIZE is 0. */
22945 retval
.data
= NULL
;
22948 else if (attr_form_is_section_offset (attr
))
22950 struct dwarf2_loclist_baton loclist_baton
;
22951 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22954 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22956 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22958 retval
.size
= size
;
22962 if (!attr_form_is_block (attr
))
22963 error (_("Dwarf Error: DIE at %s referenced in module %s "
22964 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22965 sect_offset_str (sect_off
), objfile_name (objfile
));
22967 retval
.data
= DW_BLOCK (attr
)->data
;
22968 retval
.size
= DW_BLOCK (attr
)->size
;
22970 retval
.per_cu
= cu
->per_cu
;
22972 age_cached_comp_units (dwarf2_per_objfile
);
22977 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
22980 struct dwarf2_locexpr_baton
22981 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22982 struct dwarf2_per_cu_data
*per_cu
,
22983 CORE_ADDR (*get_frame_pc
) (void *baton
),
22986 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22988 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22991 /* Write a constant of a given type as target-ordered bytes into
22994 static const gdb_byte
*
22995 write_constant_as_bytes (struct obstack
*obstack
,
22996 enum bfd_endian byte_order
,
23003 *len
= TYPE_LENGTH (type
);
23004 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23005 store_unsigned_integer (result
, *len
, byte_order
, value
);
23010 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23011 pointer to the constant bytes and set LEN to the length of the
23012 data. If memory is needed, allocate it on OBSTACK. If the DIE
23013 does not have a DW_AT_const_value, return NULL. */
23016 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23017 struct dwarf2_per_cu_data
*per_cu
,
23018 struct obstack
*obstack
,
23021 struct dwarf2_cu
*cu
;
23022 struct die_info
*die
;
23023 struct attribute
*attr
;
23024 const gdb_byte
*result
= NULL
;
23027 enum bfd_endian byte_order
;
23028 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23030 if (per_cu
->cu
== NULL
)
23035 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23036 Instead just throw an error, not much else we can do. */
23037 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23038 sect_offset_str (sect_off
), objfile_name (objfile
));
23041 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23043 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23044 sect_offset_str (sect_off
), objfile_name (objfile
));
23046 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23050 byte_order
= (bfd_big_endian (objfile
->obfd
)
23051 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23053 switch (attr
->form
)
23056 case DW_FORM_GNU_addr_index
:
23060 *len
= cu
->header
.addr_size
;
23061 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23062 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23066 case DW_FORM_string
:
23068 case DW_FORM_GNU_str_index
:
23069 case DW_FORM_GNU_strp_alt
:
23070 /* DW_STRING is already allocated on the objfile obstack, point
23072 result
= (const gdb_byte
*) DW_STRING (attr
);
23073 *len
= strlen (DW_STRING (attr
));
23075 case DW_FORM_block1
:
23076 case DW_FORM_block2
:
23077 case DW_FORM_block4
:
23078 case DW_FORM_block
:
23079 case DW_FORM_exprloc
:
23080 case DW_FORM_data16
:
23081 result
= DW_BLOCK (attr
)->data
;
23082 *len
= DW_BLOCK (attr
)->size
;
23085 /* The DW_AT_const_value attributes are supposed to carry the
23086 symbol's value "represented as it would be on the target
23087 architecture." By the time we get here, it's already been
23088 converted to host endianness, so we just need to sign- or
23089 zero-extend it as appropriate. */
23090 case DW_FORM_data1
:
23091 type
= die_type (die
, cu
);
23092 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23093 if (result
== NULL
)
23094 result
= write_constant_as_bytes (obstack
, byte_order
,
23097 case DW_FORM_data2
:
23098 type
= die_type (die
, cu
);
23099 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23100 if (result
== NULL
)
23101 result
= write_constant_as_bytes (obstack
, byte_order
,
23104 case DW_FORM_data4
:
23105 type
= die_type (die
, cu
);
23106 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23107 if (result
== NULL
)
23108 result
= write_constant_as_bytes (obstack
, byte_order
,
23111 case DW_FORM_data8
:
23112 type
= die_type (die
, cu
);
23113 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23114 if (result
== NULL
)
23115 result
= write_constant_as_bytes (obstack
, byte_order
,
23119 case DW_FORM_sdata
:
23120 case DW_FORM_implicit_const
:
23121 type
= die_type (die
, cu
);
23122 result
= write_constant_as_bytes (obstack
, byte_order
,
23123 type
, DW_SND (attr
), len
);
23126 case DW_FORM_udata
:
23127 type
= die_type (die
, cu
);
23128 result
= write_constant_as_bytes (obstack
, byte_order
,
23129 type
, DW_UNSND (attr
), len
);
23133 complaint (&symfile_complaints
,
23134 _("unsupported const value attribute form: '%s'"),
23135 dwarf_form_name (attr
->form
));
23142 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23143 valid type for this die is found. */
23146 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23147 struct dwarf2_per_cu_data
*per_cu
)
23149 struct dwarf2_cu
*cu
;
23150 struct die_info
*die
;
23152 if (per_cu
->cu
== NULL
)
23158 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23162 return die_type (die
, cu
);
23165 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23169 dwarf2_get_die_type (cu_offset die_offset
,
23170 struct dwarf2_per_cu_data
*per_cu
)
23172 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23173 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23176 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23177 On entry *REF_CU is the CU of SRC_DIE.
23178 On exit *REF_CU is the CU of the result.
23179 Returns NULL if the referenced DIE isn't found. */
23181 static struct die_info
*
23182 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23183 struct dwarf2_cu
**ref_cu
)
23185 struct die_info temp_die
;
23186 struct dwarf2_cu
*sig_cu
;
23187 struct die_info
*die
;
23189 /* While it might be nice to assert sig_type->type == NULL here,
23190 we can get here for DW_AT_imported_declaration where we need
23191 the DIE not the type. */
23193 /* If necessary, add it to the queue and load its DIEs. */
23195 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23196 read_signatured_type (sig_type
);
23198 sig_cu
= sig_type
->per_cu
.cu
;
23199 gdb_assert (sig_cu
!= NULL
);
23200 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23201 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23202 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23203 to_underlying (temp_die
.sect_off
));
23206 struct dwarf2_per_objfile
*dwarf2_per_objfile
23207 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23209 /* For .gdb_index version 7 keep track of included TUs.
23210 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23211 if (dwarf2_per_objfile
->index_table
!= NULL
23212 && dwarf2_per_objfile
->index_table
->version
<= 7)
23214 VEC_safe_push (dwarf2_per_cu_ptr
,
23215 (*ref_cu
)->per_cu
->imported_symtabs
,
23226 /* Follow signatured type referenced by ATTR in SRC_DIE.
23227 On entry *REF_CU is the CU of SRC_DIE.
23228 On exit *REF_CU is the CU of the result.
23229 The result is the DIE of the type.
23230 If the referenced type cannot be found an error is thrown. */
23232 static struct die_info
*
23233 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23234 struct dwarf2_cu
**ref_cu
)
23236 ULONGEST signature
= DW_SIGNATURE (attr
);
23237 struct signatured_type
*sig_type
;
23238 struct die_info
*die
;
23240 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23242 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23243 /* sig_type will be NULL if the signatured type is missing from
23245 if (sig_type
== NULL
)
23247 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23248 " from DIE at %s [in module %s]"),
23249 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23250 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23253 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23256 dump_die_for_error (src_die
);
23257 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23258 " from DIE at %s [in module %s]"),
23259 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23260 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23266 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23267 reading in and processing the type unit if necessary. */
23269 static struct type
*
23270 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23271 struct dwarf2_cu
*cu
)
23273 struct dwarf2_per_objfile
*dwarf2_per_objfile
23274 = cu
->per_cu
->dwarf2_per_objfile
;
23275 struct signatured_type
*sig_type
;
23276 struct dwarf2_cu
*type_cu
;
23277 struct die_info
*type_die
;
23280 sig_type
= lookup_signatured_type (cu
, signature
);
23281 /* sig_type will be NULL if the signatured type is missing from
23283 if (sig_type
== NULL
)
23285 complaint (&symfile_complaints
,
23286 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23287 " from DIE at %s [in module %s]"),
23288 hex_string (signature
), sect_offset_str (die
->sect_off
),
23289 objfile_name (dwarf2_per_objfile
->objfile
));
23290 return build_error_marker_type (cu
, die
);
23293 /* If we already know the type we're done. */
23294 if (sig_type
->type
!= NULL
)
23295 return sig_type
->type
;
23298 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23299 if (type_die
!= NULL
)
23301 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23302 is created. This is important, for example, because for c++ classes
23303 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23304 type
= read_type_die (type_die
, type_cu
);
23307 complaint (&symfile_complaints
,
23308 _("Dwarf Error: Cannot build signatured type %s"
23309 " referenced from DIE at %s [in module %s]"),
23310 hex_string (signature
), sect_offset_str (die
->sect_off
),
23311 objfile_name (dwarf2_per_objfile
->objfile
));
23312 type
= build_error_marker_type (cu
, die
);
23317 complaint (&symfile_complaints
,
23318 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23319 " from DIE at %s [in module %s]"),
23320 hex_string (signature
), sect_offset_str (die
->sect_off
),
23321 objfile_name (dwarf2_per_objfile
->objfile
));
23322 type
= build_error_marker_type (cu
, die
);
23324 sig_type
->type
= type
;
23329 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23330 reading in and processing the type unit if necessary. */
23332 static struct type
*
23333 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23334 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23336 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23337 if (attr_form_is_ref (attr
))
23339 struct dwarf2_cu
*type_cu
= cu
;
23340 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23342 return read_type_die (type_die
, type_cu
);
23344 else if (attr
->form
== DW_FORM_ref_sig8
)
23346 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23350 struct dwarf2_per_objfile
*dwarf2_per_objfile
23351 = cu
->per_cu
->dwarf2_per_objfile
;
23353 complaint (&symfile_complaints
,
23354 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23355 " at %s [in module %s]"),
23356 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23357 objfile_name (dwarf2_per_objfile
->objfile
));
23358 return build_error_marker_type (cu
, die
);
23362 /* Load the DIEs associated with type unit PER_CU into memory. */
23365 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23367 struct signatured_type
*sig_type
;
23369 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23370 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23372 /* We have the per_cu, but we need the signatured_type.
23373 Fortunately this is an easy translation. */
23374 gdb_assert (per_cu
->is_debug_types
);
23375 sig_type
= (struct signatured_type
*) per_cu
;
23377 gdb_assert (per_cu
->cu
== NULL
);
23379 read_signatured_type (sig_type
);
23381 gdb_assert (per_cu
->cu
!= NULL
);
23384 /* die_reader_func for read_signatured_type.
23385 This is identical to load_full_comp_unit_reader,
23386 but is kept separate for now. */
23389 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23390 const gdb_byte
*info_ptr
,
23391 struct die_info
*comp_unit_die
,
23395 struct dwarf2_cu
*cu
= reader
->cu
;
23397 gdb_assert (cu
->die_hash
== NULL
);
23399 htab_create_alloc_ex (cu
->header
.length
/ 12,
23403 &cu
->comp_unit_obstack
,
23404 hashtab_obstack_allocate
,
23405 dummy_obstack_deallocate
);
23408 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23409 &info_ptr
, comp_unit_die
);
23410 cu
->dies
= comp_unit_die
;
23411 /* comp_unit_die is not stored in die_hash, no need. */
23413 /* We try not to read any attributes in this function, because not
23414 all CUs needed for references have been loaded yet, and symbol
23415 table processing isn't initialized. But we have to set the CU language,
23416 or we won't be able to build types correctly.
23417 Similarly, if we do not read the producer, we can not apply
23418 producer-specific interpretation. */
23419 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23422 /* Read in a signatured type and build its CU and DIEs.
23423 If the type is a stub for the real type in a DWO file,
23424 read in the real type from the DWO file as well. */
23427 read_signatured_type (struct signatured_type
*sig_type
)
23429 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23431 gdb_assert (per_cu
->is_debug_types
);
23432 gdb_assert (per_cu
->cu
== NULL
);
23434 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
23435 read_signatured_type_reader
, NULL
);
23436 sig_type
->per_cu
.tu_read
= 1;
23439 /* Decode simple location descriptions.
23440 Given a pointer to a dwarf block that defines a location, compute
23441 the location and return the value.
23443 NOTE drow/2003-11-18: This function is called in two situations
23444 now: for the address of static or global variables (partial symbols
23445 only) and for offsets into structures which are expected to be
23446 (more or less) constant. The partial symbol case should go away,
23447 and only the constant case should remain. That will let this
23448 function complain more accurately. A few special modes are allowed
23449 without complaint for global variables (for instance, global
23450 register values and thread-local values).
23452 A location description containing no operations indicates that the
23453 object is optimized out. The return value is 0 for that case.
23454 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23455 callers will only want a very basic result and this can become a
23458 Note that stack[0] is unused except as a default error return. */
23461 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23463 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23465 size_t size
= blk
->size
;
23466 const gdb_byte
*data
= blk
->data
;
23467 CORE_ADDR stack
[64];
23469 unsigned int bytes_read
, unsnd
;
23475 stack
[++stacki
] = 0;
23514 stack
[++stacki
] = op
- DW_OP_lit0
;
23549 stack
[++stacki
] = op
- DW_OP_reg0
;
23551 dwarf2_complex_location_expr_complaint ();
23555 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23557 stack
[++stacki
] = unsnd
;
23559 dwarf2_complex_location_expr_complaint ();
23563 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23568 case DW_OP_const1u
:
23569 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23573 case DW_OP_const1s
:
23574 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23578 case DW_OP_const2u
:
23579 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23583 case DW_OP_const2s
:
23584 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23588 case DW_OP_const4u
:
23589 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23593 case DW_OP_const4s
:
23594 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23598 case DW_OP_const8u
:
23599 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23604 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23610 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23615 stack
[stacki
+ 1] = stack
[stacki
];
23620 stack
[stacki
- 1] += stack
[stacki
];
23624 case DW_OP_plus_uconst
:
23625 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23631 stack
[stacki
- 1] -= stack
[stacki
];
23636 /* If we're not the last op, then we definitely can't encode
23637 this using GDB's address_class enum. This is valid for partial
23638 global symbols, although the variable's address will be bogus
23641 dwarf2_complex_location_expr_complaint ();
23644 case DW_OP_GNU_push_tls_address
:
23645 case DW_OP_form_tls_address
:
23646 /* The top of the stack has the offset from the beginning
23647 of the thread control block at which the variable is located. */
23648 /* Nothing should follow this operator, so the top of stack would
23650 /* This is valid for partial global symbols, but the variable's
23651 address will be bogus in the psymtab. Make it always at least
23652 non-zero to not look as a variable garbage collected by linker
23653 which have DW_OP_addr 0. */
23655 dwarf2_complex_location_expr_complaint ();
23659 case DW_OP_GNU_uninit
:
23662 case DW_OP_GNU_addr_index
:
23663 case DW_OP_GNU_const_index
:
23664 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23671 const char *name
= get_DW_OP_name (op
);
23674 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23677 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23681 return (stack
[stacki
]);
23684 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23685 outside of the allocated space. Also enforce minimum>0. */
23686 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23688 complaint (&symfile_complaints
,
23689 _("location description stack overflow"));
23695 complaint (&symfile_complaints
,
23696 _("location description stack underflow"));
23700 return (stack
[stacki
]);
23703 /* memory allocation interface */
23705 static struct dwarf_block
*
23706 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23708 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23711 static struct die_info
*
23712 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23714 struct die_info
*die
;
23715 size_t size
= sizeof (struct die_info
);
23718 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23720 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23721 memset (die
, 0, sizeof (struct die_info
));
23726 /* Macro support. */
23728 /* Return file name relative to the compilation directory of file number I in
23729 *LH's file name table. The result is allocated using xmalloc; the caller is
23730 responsible for freeing it. */
23733 file_file_name (int file
, struct line_header
*lh
)
23735 /* Is the file number a valid index into the line header's file name
23736 table? Remember that file numbers start with one, not zero. */
23737 if (1 <= file
&& file
<= lh
->file_names
.size ())
23739 const file_entry
&fe
= lh
->file_names
[file
- 1];
23741 if (!IS_ABSOLUTE_PATH (fe
.name
))
23743 const char *dir
= fe
.include_dir (lh
);
23745 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23747 return xstrdup (fe
.name
);
23751 /* The compiler produced a bogus file number. We can at least
23752 record the macro definitions made in the file, even if we
23753 won't be able to find the file by name. */
23754 char fake_name
[80];
23756 xsnprintf (fake_name
, sizeof (fake_name
),
23757 "<bad macro file number %d>", file
);
23759 complaint (&symfile_complaints
,
23760 _("bad file number in macro information (%d)"),
23763 return xstrdup (fake_name
);
23767 /* Return the full name of file number I in *LH's file name table.
23768 Use COMP_DIR as the name of the current directory of the
23769 compilation. The result is allocated using xmalloc; the caller is
23770 responsible for freeing it. */
23772 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23774 /* Is the file number a valid index into the line header's file name
23775 table? Remember that file numbers start with one, not zero. */
23776 if (1 <= file
&& file
<= lh
->file_names
.size ())
23778 char *relative
= file_file_name (file
, lh
);
23780 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23782 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23783 relative
, (char *) NULL
);
23786 return file_file_name (file
, lh
);
23790 static struct macro_source_file
*
23791 macro_start_file (int file
, int line
,
23792 struct macro_source_file
*current_file
,
23793 struct line_header
*lh
)
23795 /* File name relative to the compilation directory of this source file. */
23796 char *file_name
= file_file_name (file
, lh
);
23798 if (! current_file
)
23800 /* Note: We don't create a macro table for this compilation unit
23801 at all until we actually get a filename. */
23802 struct macro_table
*macro_table
= get_macro_table ();
23804 /* If we have no current file, then this must be the start_file
23805 directive for the compilation unit's main source file. */
23806 current_file
= macro_set_main (macro_table
, file_name
);
23807 macro_define_special (macro_table
);
23810 current_file
= macro_include (current_file
, line
, file_name
);
23814 return current_file
;
23817 static const char *
23818 consume_improper_spaces (const char *p
, const char *body
)
23822 complaint (&symfile_complaints
,
23823 _("macro definition contains spaces "
23824 "in formal argument list:\n`%s'"),
23836 parse_macro_definition (struct macro_source_file
*file
, int line
,
23841 /* The body string takes one of two forms. For object-like macro
23842 definitions, it should be:
23844 <macro name> " " <definition>
23846 For function-like macro definitions, it should be:
23848 <macro name> "() " <definition>
23850 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23852 Spaces may appear only where explicitly indicated, and in the
23855 The Dwarf 2 spec says that an object-like macro's name is always
23856 followed by a space, but versions of GCC around March 2002 omit
23857 the space when the macro's definition is the empty string.
23859 The Dwarf 2 spec says that there should be no spaces between the
23860 formal arguments in a function-like macro's formal argument list,
23861 but versions of GCC around March 2002 include spaces after the
23865 /* Find the extent of the macro name. The macro name is terminated
23866 by either a space or null character (for an object-like macro) or
23867 an opening paren (for a function-like macro). */
23868 for (p
= body
; *p
; p
++)
23869 if (*p
== ' ' || *p
== '(')
23872 if (*p
== ' ' || *p
== '\0')
23874 /* It's an object-like macro. */
23875 int name_len
= p
- body
;
23876 char *name
= savestring (body
, name_len
);
23877 const char *replacement
;
23880 replacement
= body
+ name_len
+ 1;
23883 dwarf2_macro_malformed_definition_complaint (body
);
23884 replacement
= body
+ name_len
;
23887 macro_define_object (file
, line
, name
, replacement
);
23891 else if (*p
== '(')
23893 /* It's a function-like macro. */
23894 char *name
= savestring (body
, p
- body
);
23897 char **argv
= XNEWVEC (char *, argv_size
);
23901 p
= consume_improper_spaces (p
, body
);
23903 /* Parse the formal argument list. */
23904 while (*p
&& *p
!= ')')
23906 /* Find the extent of the current argument name. */
23907 const char *arg_start
= p
;
23909 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23912 if (! *p
|| p
== arg_start
)
23913 dwarf2_macro_malformed_definition_complaint (body
);
23916 /* Make sure argv has room for the new argument. */
23917 if (argc
>= argv_size
)
23920 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23923 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23926 p
= consume_improper_spaces (p
, body
);
23928 /* Consume the comma, if present. */
23933 p
= consume_improper_spaces (p
, body
);
23942 /* Perfectly formed definition, no complaints. */
23943 macro_define_function (file
, line
, name
,
23944 argc
, (const char **) argv
,
23946 else if (*p
== '\0')
23948 /* Complain, but do define it. */
23949 dwarf2_macro_malformed_definition_complaint (body
);
23950 macro_define_function (file
, line
, name
,
23951 argc
, (const char **) argv
,
23955 /* Just complain. */
23956 dwarf2_macro_malformed_definition_complaint (body
);
23959 /* Just complain. */
23960 dwarf2_macro_malformed_definition_complaint (body
);
23966 for (i
= 0; i
< argc
; i
++)
23972 dwarf2_macro_malformed_definition_complaint (body
);
23975 /* Skip some bytes from BYTES according to the form given in FORM.
23976 Returns the new pointer. */
23978 static const gdb_byte
*
23979 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
23980 enum dwarf_form form
,
23981 unsigned int offset_size
,
23982 struct dwarf2_section_info
*section
)
23984 unsigned int bytes_read
;
23988 case DW_FORM_data1
:
23993 case DW_FORM_data2
:
23997 case DW_FORM_data4
:
24001 case DW_FORM_data8
:
24005 case DW_FORM_data16
:
24009 case DW_FORM_string
:
24010 read_direct_string (abfd
, bytes
, &bytes_read
);
24011 bytes
+= bytes_read
;
24014 case DW_FORM_sec_offset
:
24016 case DW_FORM_GNU_strp_alt
:
24017 bytes
+= offset_size
;
24020 case DW_FORM_block
:
24021 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24022 bytes
+= bytes_read
;
24025 case DW_FORM_block1
:
24026 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24028 case DW_FORM_block2
:
24029 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24031 case DW_FORM_block4
:
24032 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24035 case DW_FORM_sdata
:
24036 case DW_FORM_udata
:
24037 case DW_FORM_GNU_addr_index
:
24038 case DW_FORM_GNU_str_index
:
24039 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24042 dwarf2_section_buffer_overflow_complaint (section
);
24047 case DW_FORM_implicit_const
:
24052 complaint (&symfile_complaints
,
24053 _("invalid form 0x%x in `%s'"),
24054 form
, get_section_name (section
));
24062 /* A helper for dwarf_decode_macros that handles skipping an unknown
24063 opcode. Returns an updated pointer to the macro data buffer; or,
24064 on error, issues a complaint and returns NULL. */
24066 static const gdb_byte
*
24067 skip_unknown_opcode (unsigned int opcode
,
24068 const gdb_byte
**opcode_definitions
,
24069 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24071 unsigned int offset_size
,
24072 struct dwarf2_section_info
*section
)
24074 unsigned int bytes_read
, i
;
24076 const gdb_byte
*defn
;
24078 if (opcode_definitions
[opcode
] == NULL
)
24080 complaint (&symfile_complaints
,
24081 _("unrecognized DW_MACFINO opcode 0x%x"),
24086 defn
= opcode_definitions
[opcode
];
24087 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24088 defn
+= bytes_read
;
24090 for (i
= 0; i
< arg
; ++i
)
24092 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24093 (enum dwarf_form
) defn
[i
], offset_size
,
24095 if (mac_ptr
== NULL
)
24097 /* skip_form_bytes already issued the complaint. */
24105 /* A helper function which parses the header of a macro section.
24106 If the macro section is the extended (for now called "GNU") type,
24107 then this updates *OFFSET_SIZE. Returns a pointer to just after
24108 the header, or issues a complaint and returns NULL on error. */
24110 static const gdb_byte
*
24111 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24113 const gdb_byte
*mac_ptr
,
24114 unsigned int *offset_size
,
24115 int section_is_gnu
)
24117 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24119 if (section_is_gnu
)
24121 unsigned int version
, flags
;
24123 version
= read_2_bytes (abfd
, mac_ptr
);
24124 if (version
!= 4 && version
!= 5)
24126 complaint (&symfile_complaints
,
24127 _("unrecognized version `%d' in .debug_macro section"),
24133 flags
= read_1_byte (abfd
, mac_ptr
);
24135 *offset_size
= (flags
& 1) ? 8 : 4;
24137 if ((flags
& 2) != 0)
24138 /* We don't need the line table offset. */
24139 mac_ptr
+= *offset_size
;
24141 /* Vendor opcode descriptions. */
24142 if ((flags
& 4) != 0)
24144 unsigned int i
, count
;
24146 count
= read_1_byte (abfd
, mac_ptr
);
24148 for (i
= 0; i
< count
; ++i
)
24150 unsigned int opcode
, bytes_read
;
24153 opcode
= read_1_byte (abfd
, mac_ptr
);
24155 opcode_definitions
[opcode
] = mac_ptr
;
24156 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24157 mac_ptr
+= bytes_read
;
24166 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24167 including DW_MACRO_import. */
24170 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24172 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24173 struct macro_source_file
*current_file
,
24174 struct line_header
*lh
,
24175 struct dwarf2_section_info
*section
,
24176 int section_is_gnu
, int section_is_dwz
,
24177 unsigned int offset_size
,
24178 htab_t include_hash
)
24180 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24181 enum dwarf_macro_record_type macinfo_type
;
24182 int at_commandline
;
24183 const gdb_byte
*opcode_definitions
[256];
24185 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24186 &offset_size
, section_is_gnu
);
24187 if (mac_ptr
== NULL
)
24189 /* We already issued a complaint. */
24193 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24194 GDB is still reading the definitions from command line. First
24195 DW_MACINFO_start_file will need to be ignored as it was already executed
24196 to create CURRENT_FILE for the main source holding also the command line
24197 definitions. On first met DW_MACINFO_start_file this flag is reset to
24198 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24200 at_commandline
= 1;
24204 /* Do we at least have room for a macinfo type byte? */
24205 if (mac_ptr
>= mac_end
)
24207 dwarf2_section_buffer_overflow_complaint (section
);
24211 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24214 /* Note that we rely on the fact that the corresponding GNU and
24215 DWARF constants are the same. */
24217 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24218 switch (macinfo_type
)
24220 /* A zero macinfo type indicates the end of the macro
24225 case DW_MACRO_define
:
24226 case DW_MACRO_undef
:
24227 case DW_MACRO_define_strp
:
24228 case DW_MACRO_undef_strp
:
24229 case DW_MACRO_define_sup
:
24230 case DW_MACRO_undef_sup
:
24232 unsigned int bytes_read
;
24237 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24238 mac_ptr
+= bytes_read
;
24240 if (macinfo_type
== DW_MACRO_define
24241 || macinfo_type
== DW_MACRO_undef
)
24243 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24244 mac_ptr
+= bytes_read
;
24248 LONGEST str_offset
;
24250 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24251 mac_ptr
+= offset_size
;
24253 if (macinfo_type
== DW_MACRO_define_sup
24254 || macinfo_type
== DW_MACRO_undef_sup
24257 struct dwz_file
*dwz
24258 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24260 body
= read_indirect_string_from_dwz (objfile
,
24264 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24268 is_define
= (macinfo_type
== DW_MACRO_define
24269 || macinfo_type
== DW_MACRO_define_strp
24270 || macinfo_type
== DW_MACRO_define_sup
);
24271 if (! current_file
)
24273 /* DWARF violation as no main source is present. */
24274 complaint (&symfile_complaints
,
24275 _("debug info with no main source gives macro %s "
24277 is_define
? _("definition") : _("undefinition"),
24281 if ((line
== 0 && !at_commandline
)
24282 || (line
!= 0 && at_commandline
))
24283 complaint (&symfile_complaints
,
24284 _("debug info gives %s macro %s with %s line %d: %s"),
24285 at_commandline
? _("command-line") : _("in-file"),
24286 is_define
? _("definition") : _("undefinition"),
24287 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24290 parse_macro_definition (current_file
, line
, body
);
24293 gdb_assert (macinfo_type
== DW_MACRO_undef
24294 || macinfo_type
== DW_MACRO_undef_strp
24295 || macinfo_type
== DW_MACRO_undef_sup
);
24296 macro_undef (current_file
, line
, body
);
24301 case DW_MACRO_start_file
:
24303 unsigned int bytes_read
;
24306 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24307 mac_ptr
+= bytes_read
;
24308 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24309 mac_ptr
+= bytes_read
;
24311 if ((line
== 0 && !at_commandline
)
24312 || (line
!= 0 && at_commandline
))
24313 complaint (&symfile_complaints
,
24314 _("debug info gives source %d included "
24315 "from %s at %s line %d"),
24316 file
, at_commandline
? _("command-line") : _("file"),
24317 line
== 0 ? _("zero") : _("non-zero"), line
);
24319 if (at_commandline
)
24321 /* This DW_MACRO_start_file was executed in the
24323 at_commandline
= 0;
24326 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24330 case DW_MACRO_end_file
:
24331 if (! current_file
)
24332 complaint (&symfile_complaints
,
24333 _("macro debug info has an unmatched "
24334 "`close_file' directive"));
24337 current_file
= current_file
->included_by
;
24338 if (! current_file
)
24340 enum dwarf_macro_record_type next_type
;
24342 /* GCC circa March 2002 doesn't produce the zero
24343 type byte marking the end of the compilation
24344 unit. Complain if it's not there, but exit no
24347 /* Do we at least have room for a macinfo type byte? */
24348 if (mac_ptr
>= mac_end
)
24350 dwarf2_section_buffer_overflow_complaint (section
);
24354 /* We don't increment mac_ptr here, so this is just
24357 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24359 if (next_type
!= 0)
24360 complaint (&symfile_complaints
,
24361 _("no terminating 0-type entry for "
24362 "macros in `.debug_macinfo' section"));
24369 case DW_MACRO_import
:
24370 case DW_MACRO_import_sup
:
24374 bfd
*include_bfd
= abfd
;
24375 struct dwarf2_section_info
*include_section
= section
;
24376 const gdb_byte
*include_mac_end
= mac_end
;
24377 int is_dwz
= section_is_dwz
;
24378 const gdb_byte
*new_mac_ptr
;
24380 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24381 mac_ptr
+= offset_size
;
24383 if (macinfo_type
== DW_MACRO_import_sup
)
24385 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24387 dwarf2_read_section (objfile
, &dwz
->macro
);
24389 include_section
= &dwz
->macro
;
24390 include_bfd
= get_section_bfd_owner (include_section
);
24391 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24395 new_mac_ptr
= include_section
->buffer
+ offset
;
24396 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24400 /* This has actually happened; see
24401 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24402 complaint (&symfile_complaints
,
24403 _("recursive DW_MACRO_import in "
24404 ".debug_macro section"));
24408 *slot
= (void *) new_mac_ptr
;
24410 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24411 include_bfd
, new_mac_ptr
,
24412 include_mac_end
, current_file
, lh
,
24413 section
, section_is_gnu
, is_dwz
,
24414 offset_size
, include_hash
);
24416 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24421 case DW_MACINFO_vendor_ext
:
24422 if (!section_is_gnu
)
24424 unsigned int bytes_read
;
24426 /* This reads the constant, but since we don't recognize
24427 any vendor extensions, we ignore it. */
24428 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24429 mac_ptr
+= bytes_read
;
24430 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24431 mac_ptr
+= bytes_read
;
24433 /* We don't recognize any vendor extensions. */
24439 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24440 mac_ptr
, mac_end
, abfd
, offset_size
,
24442 if (mac_ptr
== NULL
)
24447 } while (macinfo_type
!= 0);
24451 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24452 int section_is_gnu
)
24454 struct dwarf2_per_objfile
*dwarf2_per_objfile
24455 = cu
->per_cu
->dwarf2_per_objfile
;
24456 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24457 struct line_header
*lh
= cu
->line_header
;
24459 const gdb_byte
*mac_ptr
, *mac_end
;
24460 struct macro_source_file
*current_file
= 0;
24461 enum dwarf_macro_record_type macinfo_type
;
24462 unsigned int offset_size
= cu
->header
.offset_size
;
24463 const gdb_byte
*opcode_definitions
[256];
24465 struct dwarf2_section_info
*section
;
24466 const char *section_name
;
24468 if (cu
->dwo_unit
!= NULL
)
24470 if (section_is_gnu
)
24472 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24473 section_name
= ".debug_macro.dwo";
24477 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24478 section_name
= ".debug_macinfo.dwo";
24483 if (section_is_gnu
)
24485 section
= &dwarf2_per_objfile
->macro
;
24486 section_name
= ".debug_macro";
24490 section
= &dwarf2_per_objfile
->macinfo
;
24491 section_name
= ".debug_macinfo";
24495 dwarf2_read_section (objfile
, section
);
24496 if (section
->buffer
== NULL
)
24498 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24501 abfd
= get_section_bfd_owner (section
);
24503 /* First pass: Find the name of the base filename.
24504 This filename is needed in order to process all macros whose definition
24505 (or undefinition) comes from the command line. These macros are defined
24506 before the first DW_MACINFO_start_file entry, and yet still need to be
24507 associated to the base file.
24509 To determine the base file name, we scan the macro definitions until we
24510 reach the first DW_MACINFO_start_file entry. We then initialize
24511 CURRENT_FILE accordingly so that any macro definition found before the
24512 first DW_MACINFO_start_file can still be associated to the base file. */
24514 mac_ptr
= section
->buffer
+ offset
;
24515 mac_end
= section
->buffer
+ section
->size
;
24517 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24518 &offset_size
, section_is_gnu
);
24519 if (mac_ptr
== NULL
)
24521 /* We already issued a complaint. */
24527 /* Do we at least have room for a macinfo type byte? */
24528 if (mac_ptr
>= mac_end
)
24530 /* Complaint is printed during the second pass as GDB will probably
24531 stop the first pass earlier upon finding
24532 DW_MACINFO_start_file. */
24536 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24539 /* Note that we rely on the fact that the corresponding GNU and
24540 DWARF constants are the same. */
24542 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24543 switch (macinfo_type
)
24545 /* A zero macinfo type indicates the end of the macro
24550 case DW_MACRO_define
:
24551 case DW_MACRO_undef
:
24552 /* Only skip the data by MAC_PTR. */
24554 unsigned int bytes_read
;
24556 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24557 mac_ptr
+= bytes_read
;
24558 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24559 mac_ptr
+= bytes_read
;
24563 case DW_MACRO_start_file
:
24565 unsigned int bytes_read
;
24568 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24569 mac_ptr
+= bytes_read
;
24570 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24571 mac_ptr
+= bytes_read
;
24573 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24577 case DW_MACRO_end_file
:
24578 /* No data to skip by MAC_PTR. */
24581 case DW_MACRO_define_strp
:
24582 case DW_MACRO_undef_strp
:
24583 case DW_MACRO_define_sup
:
24584 case DW_MACRO_undef_sup
:
24586 unsigned int bytes_read
;
24588 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24589 mac_ptr
+= bytes_read
;
24590 mac_ptr
+= offset_size
;
24594 case DW_MACRO_import
:
24595 case DW_MACRO_import_sup
:
24596 /* Note that, according to the spec, a transparent include
24597 chain cannot call DW_MACRO_start_file. So, we can just
24598 skip this opcode. */
24599 mac_ptr
+= offset_size
;
24602 case DW_MACINFO_vendor_ext
:
24603 /* Only skip the data by MAC_PTR. */
24604 if (!section_is_gnu
)
24606 unsigned int bytes_read
;
24608 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24609 mac_ptr
+= bytes_read
;
24610 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24611 mac_ptr
+= bytes_read
;
24616 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24617 mac_ptr
, mac_end
, abfd
, offset_size
,
24619 if (mac_ptr
== NULL
)
24624 } while (macinfo_type
!= 0 && current_file
== NULL
);
24626 /* Second pass: Process all entries.
24628 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24629 command-line macro definitions/undefinitions. This flag is unset when we
24630 reach the first DW_MACINFO_start_file entry. */
24632 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24634 NULL
, xcalloc
, xfree
));
24635 mac_ptr
= section
->buffer
+ offset
;
24636 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24637 *slot
= (void *) mac_ptr
;
24638 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24639 abfd
, mac_ptr
, mac_end
,
24640 current_file
, lh
, section
,
24641 section_is_gnu
, 0, offset_size
,
24642 include_hash
.get ());
24645 /* Check if the attribute's form is a DW_FORM_block*
24646 if so return true else false. */
24649 attr_form_is_block (const struct attribute
*attr
)
24651 return (attr
== NULL
? 0 :
24652 attr
->form
== DW_FORM_block1
24653 || attr
->form
== DW_FORM_block2
24654 || attr
->form
== DW_FORM_block4
24655 || attr
->form
== DW_FORM_block
24656 || attr
->form
== DW_FORM_exprloc
);
24659 /* Return non-zero if ATTR's value is a section offset --- classes
24660 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24661 You may use DW_UNSND (attr) to retrieve such offsets.
24663 Section 7.5.4, "Attribute Encodings", explains that no attribute
24664 may have a value that belongs to more than one of these classes; it
24665 would be ambiguous if we did, because we use the same forms for all
24669 attr_form_is_section_offset (const struct attribute
*attr
)
24671 return (attr
->form
== DW_FORM_data4
24672 || attr
->form
== DW_FORM_data8
24673 || attr
->form
== DW_FORM_sec_offset
);
24676 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24677 zero otherwise. When this function returns true, you can apply
24678 dwarf2_get_attr_constant_value to it.
24680 However, note that for some attributes you must check
24681 attr_form_is_section_offset before using this test. DW_FORM_data4
24682 and DW_FORM_data8 are members of both the constant class, and of
24683 the classes that contain offsets into other debug sections
24684 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24685 that, if an attribute's can be either a constant or one of the
24686 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24687 taken as section offsets, not constants.
24689 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24690 cannot handle that. */
24693 attr_form_is_constant (const struct attribute
*attr
)
24695 switch (attr
->form
)
24697 case DW_FORM_sdata
:
24698 case DW_FORM_udata
:
24699 case DW_FORM_data1
:
24700 case DW_FORM_data2
:
24701 case DW_FORM_data4
:
24702 case DW_FORM_data8
:
24703 case DW_FORM_implicit_const
:
24711 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24712 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24715 attr_form_is_ref (const struct attribute
*attr
)
24717 switch (attr
->form
)
24719 case DW_FORM_ref_addr
:
24724 case DW_FORM_ref_udata
:
24725 case DW_FORM_GNU_ref_alt
:
24732 /* Return the .debug_loc section to use for CU.
24733 For DWO files use .debug_loc.dwo. */
24735 static struct dwarf2_section_info
*
24736 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24738 struct dwarf2_per_objfile
*dwarf2_per_objfile
24739 = cu
->per_cu
->dwarf2_per_objfile
;
24743 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24745 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24747 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24748 : &dwarf2_per_objfile
->loc
);
24751 /* A helper function that fills in a dwarf2_loclist_baton. */
24754 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24755 struct dwarf2_loclist_baton
*baton
,
24756 const struct attribute
*attr
)
24758 struct dwarf2_per_objfile
*dwarf2_per_objfile
24759 = cu
->per_cu
->dwarf2_per_objfile
;
24760 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24762 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24764 baton
->per_cu
= cu
->per_cu
;
24765 gdb_assert (baton
->per_cu
);
24766 /* We don't know how long the location list is, but make sure we
24767 don't run off the edge of the section. */
24768 baton
->size
= section
->size
- DW_UNSND (attr
);
24769 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24770 baton
->base_address
= cu
->base_address
;
24771 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24775 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24776 struct dwarf2_cu
*cu
, int is_block
)
24778 struct dwarf2_per_objfile
*dwarf2_per_objfile
24779 = cu
->per_cu
->dwarf2_per_objfile
;
24780 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24781 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24783 if (attr_form_is_section_offset (attr
)
24784 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24785 the section. If so, fall through to the complaint in the
24787 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24789 struct dwarf2_loclist_baton
*baton
;
24791 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24793 fill_in_loclist_baton (cu
, baton
, attr
);
24795 if (cu
->base_known
== 0)
24796 complaint (&symfile_complaints
,
24797 _("Location list used without "
24798 "specifying the CU base address."));
24800 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24801 ? dwarf2_loclist_block_index
24802 : dwarf2_loclist_index
);
24803 SYMBOL_LOCATION_BATON (sym
) = baton
;
24807 struct dwarf2_locexpr_baton
*baton
;
24809 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24810 baton
->per_cu
= cu
->per_cu
;
24811 gdb_assert (baton
->per_cu
);
24813 if (attr_form_is_block (attr
))
24815 /* Note that we're just copying the block's data pointer
24816 here, not the actual data. We're still pointing into the
24817 info_buffer for SYM's objfile; right now we never release
24818 that buffer, but when we do clean up properly this may
24820 baton
->size
= DW_BLOCK (attr
)->size
;
24821 baton
->data
= DW_BLOCK (attr
)->data
;
24825 dwarf2_invalid_attrib_class_complaint ("location description",
24826 SYMBOL_NATURAL_NAME (sym
));
24830 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24831 ? dwarf2_locexpr_block_index
24832 : dwarf2_locexpr_index
);
24833 SYMBOL_LOCATION_BATON (sym
) = baton
;
24837 /* Return the OBJFILE associated with the compilation unit CU. If CU
24838 came from a separate debuginfo file, then the master objfile is
24842 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24844 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24846 /* Return the master objfile, so that we can report and look up the
24847 correct file containing this variable. */
24848 if (objfile
->separate_debug_objfile_backlink
)
24849 objfile
= objfile
->separate_debug_objfile_backlink
;
24854 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24855 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24856 CU_HEADERP first. */
24858 static const struct comp_unit_head
*
24859 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24860 struct dwarf2_per_cu_data
*per_cu
)
24862 const gdb_byte
*info_ptr
;
24865 return &per_cu
->cu
->header
;
24867 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24869 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24870 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24871 rcuh_kind::COMPILE
);
24876 /* Return the address size given in the compilation unit header for CU. */
24879 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24881 struct comp_unit_head cu_header_local
;
24882 const struct comp_unit_head
*cu_headerp
;
24884 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24886 return cu_headerp
->addr_size
;
24889 /* Return the offset size given in the compilation unit header for CU. */
24892 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24894 struct comp_unit_head cu_header_local
;
24895 const struct comp_unit_head
*cu_headerp
;
24897 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24899 return cu_headerp
->offset_size
;
24902 /* See its dwarf2loc.h declaration. */
24905 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24907 struct comp_unit_head cu_header_local
;
24908 const struct comp_unit_head
*cu_headerp
;
24910 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24912 if (cu_headerp
->version
== 2)
24913 return cu_headerp
->addr_size
;
24915 return cu_headerp
->offset_size
;
24918 /* Return the text offset of the CU. The returned offset comes from
24919 this CU's objfile. If this objfile came from a separate debuginfo
24920 file, then the offset may be different from the corresponding
24921 offset in the parent objfile. */
24924 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24926 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24928 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24931 /* Return DWARF version number of PER_CU. */
24934 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24936 return per_cu
->dwarf_version
;
24939 /* Locate the .debug_info compilation unit from CU's objfile which contains
24940 the DIE at OFFSET. Raises an error on failure. */
24942 static struct dwarf2_per_cu_data
*
24943 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24944 unsigned int offset_in_dwz
,
24945 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24947 struct dwarf2_per_cu_data
*this_cu
;
24949 const sect_offset
*cu_off
;
24952 high
= dwarf2_per_objfile
->n_comp_units
- 1;
24955 struct dwarf2_per_cu_data
*mid_cu
;
24956 int mid
= low
+ (high
- low
) / 2;
24958 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24959 cu_off
= &mid_cu
->sect_off
;
24960 if (mid_cu
->is_dwz
> offset_in_dwz
24961 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24966 gdb_assert (low
== high
);
24967 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24968 cu_off
= &this_cu
->sect_off
;
24969 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24971 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24972 error (_("Dwarf Error: could not find partial DIE containing "
24973 "offset %s [in module %s]"),
24974 sect_offset_str (sect_off
),
24975 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24977 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24979 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24983 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24984 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
24985 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24986 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24987 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24992 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24994 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24995 : per_cu (per_cu_
),
24998 checked_producer (0),
24999 producer_is_gxx_lt_4_6 (0),
25000 producer_is_gcc_lt_4_3 (0),
25001 producer_is_icc_lt_14 (0),
25002 processing_has_namespace_info (0)
25007 /* Destroy a dwarf2_cu. */
25009 dwarf2_cu::~dwarf2_cu ()
25014 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25017 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25018 enum language pretend_language
)
25020 struct attribute
*attr
;
25022 /* Set the language we're debugging. */
25023 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25025 set_cu_language (DW_UNSND (attr
), cu
);
25028 cu
->language
= pretend_language
;
25029 cu
->language_defn
= language_def (cu
->language
);
25032 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25035 /* Increase the age counter on each cached compilation unit, and free
25036 any that are too old. */
25039 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25041 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25043 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25044 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25045 while (per_cu
!= NULL
)
25047 per_cu
->cu
->last_used
++;
25048 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25049 dwarf2_mark (per_cu
->cu
);
25050 per_cu
= per_cu
->cu
->read_in_chain
;
25053 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25054 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25055 while (per_cu
!= NULL
)
25057 struct dwarf2_per_cu_data
*next_cu
;
25059 next_cu
= per_cu
->cu
->read_in_chain
;
25061 if (!per_cu
->cu
->mark
)
25064 *last_chain
= next_cu
;
25067 last_chain
= &per_cu
->cu
->read_in_chain
;
25073 /* Remove a single compilation unit from the cache. */
25076 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25078 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25079 struct dwarf2_per_objfile
*dwarf2_per_objfile
25080 = target_per_cu
->dwarf2_per_objfile
;
25082 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25083 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25084 while (per_cu
!= NULL
)
25086 struct dwarf2_per_cu_data
*next_cu
;
25088 next_cu
= per_cu
->cu
->read_in_chain
;
25090 if (per_cu
== target_per_cu
)
25094 *last_chain
= next_cu
;
25098 last_chain
= &per_cu
->cu
->read_in_chain
;
25104 /* Release all extra memory associated with OBJFILE. */
25107 dwarf2_free_objfile (struct objfile
*objfile
)
25109 struct dwarf2_per_objfile
*dwarf2_per_objfile
25110 = get_dwarf2_per_objfile (objfile
);
25112 delete dwarf2_per_objfile
;
25115 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25116 We store these in a hash table separate from the DIEs, and preserve them
25117 when the DIEs are flushed out of cache.
25119 The CU "per_cu" pointer is needed because offset alone is not enough to
25120 uniquely identify the type. A file may have multiple .debug_types sections,
25121 or the type may come from a DWO file. Furthermore, while it's more logical
25122 to use per_cu->section+offset, with Fission the section with the data is in
25123 the DWO file but we don't know that section at the point we need it.
25124 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25125 because we can enter the lookup routine, get_die_type_at_offset, from
25126 outside this file, and thus won't necessarily have PER_CU->cu.
25127 Fortunately, PER_CU is stable for the life of the objfile. */
25129 struct dwarf2_per_cu_offset_and_type
25131 const struct dwarf2_per_cu_data
*per_cu
;
25132 sect_offset sect_off
;
25136 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25139 per_cu_offset_and_type_hash (const void *item
)
25141 const struct dwarf2_per_cu_offset_and_type
*ofs
25142 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25144 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25147 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25150 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25152 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25153 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25154 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25155 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25157 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25158 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25161 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25162 table if necessary. For convenience, return TYPE.
25164 The DIEs reading must have careful ordering to:
25165 * Not cause infite loops trying to read in DIEs as a prerequisite for
25166 reading current DIE.
25167 * Not trying to dereference contents of still incompletely read in types
25168 while reading in other DIEs.
25169 * Enable referencing still incompletely read in types just by a pointer to
25170 the type without accessing its fields.
25172 Therefore caller should follow these rules:
25173 * Try to fetch any prerequisite types we may need to build this DIE type
25174 before building the type and calling set_die_type.
25175 * After building type call set_die_type for current DIE as soon as
25176 possible before fetching more types to complete the current type.
25177 * Make the type as complete as possible before fetching more types. */
25179 static struct type
*
25180 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25182 struct dwarf2_per_objfile
*dwarf2_per_objfile
25183 = cu
->per_cu
->dwarf2_per_objfile
;
25184 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25185 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25186 struct attribute
*attr
;
25187 struct dynamic_prop prop
;
25189 /* For Ada types, make sure that the gnat-specific data is always
25190 initialized (if not already set). There are a few types where
25191 we should not be doing so, because the type-specific area is
25192 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25193 where the type-specific area is used to store the floatformat).
25194 But this is not a problem, because the gnat-specific information
25195 is actually not needed for these types. */
25196 if (need_gnat_info (cu
)
25197 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25198 && TYPE_CODE (type
) != TYPE_CODE_FLT
25199 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25200 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25201 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25202 && !HAVE_GNAT_AUX_INFO (type
))
25203 INIT_GNAT_SPECIFIC (type
);
25205 /* Read DW_AT_allocated and set in type. */
25206 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25207 if (attr_form_is_block (attr
))
25209 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25210 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25212 else if (attr
!= NULL
)
25214 complaint (&symfile_complaints
,
25215 _("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25216 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25217 sect_offset_str (die
->sect_off
));
25220 /* Read DW_AT_associated and set in type. */
25221 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25222 if (attr_form_is_block (attr
))
25224 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25225 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25227 else if (attr
!= NULL
)
25229 complaint (&symfile_complaints
,
25230 _("DW_AT_associated has the wrong form (%s) at DIE %s"),
25231 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25232 sect_offset_str (die
->sect_off
));
25235 /* Read DW_AT_data_location and set in type. */
25236 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25237 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25238 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25240 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25242 dwarf2_per_objfile
->die_type_hash
=
25243 htab_create_alloc_ex (127,
25244 per_cu_offset_and_type_hash
,
25245 per_cu_offset_and_type_eq
,
25247 &objfile
->objfile_obstack
,
25248 hashtab_obstack_allocate
,
25249 dummy_obstack_deallocate
);
25252 ofs
.per_cu
= cu
->per_cu
;
25253 ofs
.sect_off
= die
->sect_off
;
25255 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25256 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25258 complaint (&symfile_complaints
,
25259 _("A problem internal to GDB: DIE %s has type already set"),
25260 sect_offset_str (die
->sect_off
));
25261 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25262 struct dwarf2_per_cu_offset_and_type
);
25267 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25268 or return NULL if the die does not have a saved type. */
25270 static struct type
*
25271 get_die_type_at_offset (sect_offset sect_off
,
25272 struct dwarf2_per_cu_data
*per_cu
)
25274 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25275 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25277 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25280 ofs
.per_cu
= per_cu
;
25281 ofs
.sect_off
= sect_off
;
25282 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25283 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25290 /* Look up the type for DIE in CU in die_type_hash,
25291 or return NULL if DIE does not have a saved type. */
25293 static struct type
*
25294 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25296 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25299 /* Add a dependence relationship from CU to REF_PER_CU. */
25302 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25303 struct dwarf2_per_cu_data
*ref_per_cu
)
25307 if (cu
->dependencies
== NULL
)
25309 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25310 NULL
, &cu
->comp_unit_obstack
,
25311 hashtab_obstack_allocate
,
25312 dummy_obstack_deallocate
);
25314 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25316 *slot
= ref_per_cu
;
25319 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25320 Set the mark field in every compilation unit in the
25321 cache that we must keep because we are keeping CU. */
25324 dwarf2_mark_helper (void **slot
, void *data
)
25326 struct dwarf2_per_cu_data
*per_cu
;
25328 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25330 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25331 reading of the chain. As such dependencies remain valid it is not much
25332 useful to track and undo them during QUIT cleanups. */
25333 if (per_cu
->cu
== NULL
)
25336 if (per_cu
->cu
->mark
)
25338 per_cu
->cu
->mark
= 1;
25340 if (per_cu
->cu
->dependencies
!= NULL
)
25341 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25346 /* Set the mark field in CU and in every other compilation unit in the
25347 cache that we must keep because we are keeping CU. */
25350 dwarf2_mark (struct dwarf2_cu
*cu
)
25355 if (cu
->dependencies
!= NULL
)
25356 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25360 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25364 per_cu
->cu
->mark
= 0;
25365 per_cu
= per_cu
->cu
->read_in_chain
;
25369 /* Trivial hash function for partial_die_info: the hash value of a DIE
25370 is its offset in .debug_info for this objfile. */
25373 partial_die_hash (const void *item
)
25375 const struct partial_die_info
*part_die
25376 = (const struct partial_die_info
*) item
;
25378 return to_underlying (part_die
->sect_off
);
25381 /* Trivial comparison function for partial_die_info structures: two DIEs
25382 are equal if they have the same offset. */
25385 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25387 const struct partial_die_info
*part_die_lhs
25388 = (const struct partial_die_info
*) item_lhs
;
25389 const struct partial_die_info
*part_die_rhs
25390 = (const struct partial_die_info
*) item_rhs
;
25392 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25395 static struct cmd_list_element
*set_dwarf_cmdlist
;
25396 static struct cmd_list_element
*show_dwarf_cmdlist
;
25399 set_dwarf_cmd (const char *args
, int from_tty
)
25401 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25406 show_dwarf_cmd (const char *args
, int from_tty
)
25408 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25411 int dwarf_always_disassemble
;
25414 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25415 struct cmd_list_element
*c
, const char *value
)
25417 fprintf_filtered (file
,
25418 _("Whether to always disassemble "
25419 "DWARF expressions is %s.\n"),
25424 show_check_physname (struct ui_file
*file
, int from_tty
,
25425 struct cmd_list_element
*c
, const char *value
)
25427 fprintf_filtered (file
,
25428 _("Whether to check \"physname\" is %s.\n"),
25433 _initialize_dwarf2_read (void)
25436 dwarf2_objfile_data_key
= register_objfile_data ();
25438 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25439 Set DWARF specific variables.\n\
25440 Configure DWARF variables such as the cache size"),
25441 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25442 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25444 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25445 Show DWARF specific variables\n\
25446 Show DWARF variables such as the cache size"),
25447 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25448 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25450 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25451 &dwarf_max_cache_age
, _("\
25452 Set the upper bound on the age of cached DWARF compilation units."), _("\
25453 Show the upper bound on the age of cached DWARF compilation units."), _("\
25454 A higher limit means that cached compilation units will be stored\n\
25455 in memory longer, and more total memory will be used. Zero disables\n\
25456 caching, which can slow down startup."),
25458 show_dwarf_max_cache_age
,
25459 &set_dwarf_cmdlist
,
25460 &show_dwarf_cmdlist
);
25462 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25463 &dwarf_always_disassemble
, _("\
25464 Set whether `info address' always disassembles DWARF expressions."), _("\
25465 Show whether `info address' always disassembles DWARF expressions."), _("\
25466 When enabled, DWARF expressions are always printed in an assembly-like\n\
25467 syntax. When disabled, expressions will be printed in a more\n\
25468 conversational style, when possible."),
25470 show_dwarf_always_disassemble
,
25471 &set_dwarf_cmdlist
,
25472 &show_dwarf_cmdlist
);
25474 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25475 Set debugging of the DWARF reader."), _("\
25476 Show debugging of the DWARF reader."), _("\
25477 When enabled (non-zero), debugging messages are printed during DWARF\n\
25478 reading and symtab expansion. A value of 1 (one) provides basic\n\
25479 information. A value greater than 1 provides more verbose information."),
25482 &setdebuglist
, &showdebuglist
);
25484 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25485 Set debugging of the DWARF DIE reader."), _("\
25486 Show debugging of the DWARF DIE reader."), _("\
25487 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25488 The value is the maximum depth to print."),
25491 &setdebuglist
, &showdebuglist
);
25493 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25494 Set debugging of the dwarf line reader."), _("\
25495 Show debugging of the dwarf line reader."), _("\
25496 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25497 A value of 1 (one) provides basic information.\n\
25498 A value greater than 1 provides more verbose information."),
25501 &setdebuglist
, &showdebuglist
);
25503 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25504 Set cross-checking of \"physname\" code against demangler."), _("\
25505 Show cross-checking of \"physname\" code against demangler."), _("\
25506 When enabled, GDB's internal \"physname\" code is checked against\n\
25508 NULL
, show_check_physname
,
25509 &setdebuglist
, &showdebuglist
);
25511 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25512 no_class
, &use_deprecated_index_sections
, _("\
25513 Set whether to use deprecated gdb_index sections."), _("\
25514 Show whether to use deprecated gdb_index sections."), _("\
25515 When enabled, deprecated .gdb_index sections are used anyway.\n\
25516 Normally they are ignored either because of a missing feature or\n\
25517 performance issue.\n\
25518 Warning: This option must be enabled before gdb reads the file."),
25521 &setlist
, &showlist
);
25523 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25524 &dwarf2_locexpr_funcs
);
25525 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25526 &dwarf2_loclist_funcs
);
25528 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25529 &dwarf2_block_frame_base_locexpr_funcs
);
25530 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25531 &dwarf2_block_frame_base_loclist_funcs
);
25534 selftests::register_test ("dw2_expand_symtabs_matching",
25535 selftests::dw2_expand_symtabs_matching::run_test
);