1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2019 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-cache.h"
34 #include "dwarf-index-common.h"
43 #include "gdb-demangle.h"
44 #include "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
48 #include "dwarf2expr.h"
49 #include "dwarf2loc.h"
50 #include "cp-support.h"
56 #include "typeprint.h"
61 #include "gdbcore.h" /* for gnutarget */
62 #include "gdb/gdb-index.h"
67 #include "namespace.h"
68 #include "gdbsupport/function-view.h"
69 #include "gdbsupport/gdb_optional.h"
70 #include "gdbsupport/underlying.h"
71 #include "gdbsupport/hash_enum.h"
72 #include "filename-seen-cache.h"
76 #include <unordered_map>
77 #include "gdbsupport/selftest.h"
78 #include "rust-lang.h"
79 #include "gdbsupport/pathstuff.h"
81 /* When == 1, print basic high level tracing messages.
82 When > 1, be more verbose.
83 This is in contrast to the low level DIE reading of dwarf_die_debug. */
84 static unsigned int dwarf_read_debug
= 0;
86 /* When non-zero, dump DIEs after they are read in. */
87 static unsigned int dwarf_die_debug
= 0;
89 /* When non-zero, dump line number entries as they are read in. */
90 static unsigned int dwarf_line_debug
= 0;
92 /* When true, cross-check physname against demangler. */
93 static bool check_physname
= false;
95 /* When true, do not reject deprecated .gdb_index sections. */
96 static bool use_deprecated_index_sections
= false;
98 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
100 /* The "aclass" indices for various kinds of computed DWARF symbols. */
102 static int dwarf2_locexpr_index
;
103 static int dwarf2_loclist_index
;
104 static int dwarf2_locexpr_block_index
;
105 static int dwarf2_loclist_block_index
;
107 /* An index into a (C++) symbol name component in a symbol name as
108 recorded in the mapped_index's symbol table. For each C++ symbol
109 in the symbol table, we record one entry for the start of each
110 component in the symbol in a table of name components, and then
111 sort the table, in order to be able to binary search symbol names,
112 ignoring leading namespaces, both completion and regular look up.
113 For example, for symbol "A::B::C", we'll have an entry that points
114 to "A::B::C", another that points to "B::C", and another for "C".
115 Note that function symbols in GDB index have no parameter
116 information, just the function/method names. You can convert a
117 name_component to a "const char *" using the
118 'mapped_index::symbol_name_at(offset_type)' method. */
120 struct name_component
122 /* Offset in the symbol name where the component starts. Stored as
123 a (32-bit) offset instead of a pointer to save memory and improve
124 locality on 64-bit architectures. */
125 offset_type name_offset
;
127 /* The symbol's index in the symbol and constant pool tables of a
132 /* Base class containing bits shared by both .gdb_index and
133 .debug_name indexes. */
135 struct mapped_index_base
137 mapped_index_base () = default;
138 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
140 /* The name_component table (a sorted vector). See name_component's
141 description above. */
142 std::vector
<name_component
> name_components
;
144 /* How NAME_COMPONENTS is sorted. */
145 enum case_sensitivity name_components_casing
;
147 /* Return the number of names in the symbol table. */
148 virtual size_t symbol_name_count () const = 0;
150 /* Get the name of the symbol at IDX in the symbol table. */
151 virtual const char *symbol_name_at (offset_type idx
) const = 0;
153 /* Return whether the name at IDX in the symbol table should be
155 virtual bool symbol_name_slot_invalid (offset_type idx
) const
160 /* Build the symbol name component sorted vector, if we haven't
162 void build_name_components ();
164 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
165 possible matches for LN_NO_PARAMS in the name component
167 std::pair
<std::vector
<name_component
>::const_iterator
,
168 std::vector
<name_component
>::const_iterator
>
169 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
170 enum language lang
) const;
172 /* Prevent deleting/destroying via a base class pointer. */
174 ~mapped_index_base() = default;
177 /* A description of the mapped index. The file format is described in
178 a comment by the code that writes the index. */
179 struct mapped_index final
: public mapped_index_base
181 /* A slot/bucket in the symbol table hash. */
182 struct symbol_table_slot
184 const offset_type name
;
185 const offset_type vec
;
188 /* Index data format version. */
191 /* The address table data. */
192 gdb::array_view
<const gdb_byte
> address_table
;
194 /* The symbol table, implemented as a hash table. */
195 gdb::array_view
<symbol_table_slot
> symbol_table
;
197 /* A pointer to the constant pool. */
198 const char *constant_pool
= nullptr;
200 bool symbol_name_slot_invalid (offset_type idx
) const override
202 const auto &bucket
= this->symbol_table
[idx
];
203 return bucket
.name
== 0 && bucket
.vec
== 0;
206 /* Convenience method to get at the name of the symbol at IDX in the
208 const char *symbol_name_at (offset_type idx
) const override
209 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
211 size_t symbol_name_count () const override
212 { return this->symbol_table
.size (); }
215 /* A description of the mapped .debug_names.
216 Uninitialized map has CU_COUNT 0. */
217 struct mapped_debug_names final
: public mapped_index_base
219 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
220 : dwarf2_per_objfile (dwarf2_per_objfile_
)
223 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
224 bfd_endian dwarf5_byte_order
;
225 bool dwarf5_is_dwarf64
;
226 bool augmentation_is_gdb
;
228 uint32_t cu_count
= 0;
229 uint32_t tu_count
, bucket_count
, name_count
;
230 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
231 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
232 const gdb_byte
*name_table_string_offs_reordered
;
233 const gdb_byte
*name_table_entry_offs_reordered
;
234 const gdb_byte
*entry_pool
;
241 /* Attribute name DW_IDX_*. */
244 /* Attribute form DW_FORM_*. */
247 /* Value if FORM is DW_FORM_implicit_const. */
248 LONGEST implicit_const
;
250 std::vector
<attr
> attr_vec
;
253 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
255 const char *namei_to_name (uint32_t namei
) const;
257 /* Implementation of the mapped_index_base virtual interface, for
258 the name_components cache. */
260 const char *symbol_name_at (offset_type idx
) const override
261 { return namei_to_name (idx
); }
263 size_t symbol_name_count () const override
264 { return this->name_count
; }
267 /* See dwarf2read.h. */
270 get_dwarf2_per_objfile (struct objfile
*objfile
)
272 return dwarf2_objfile_data_key
.get (objfile
);
275 /* Default names of the debugging sections. */
277 /* Note that if the debugging section has been compressed, it might
278 have a name like .zdebug_info. */
280 static const struct dwarf2_debug_sections dwarf2_elf_names
=
282 { ".debug_info", ".zdebug_info" },
283 { ".debug_abbrev", ".zdebug_abbrev" },
284 { ".debug_line", ".zdebug_line" },
285 { ".debug_loc", ".zdebug_loc" },
286 { ".debug_loclists", ".zdebug_loclists" },
287 { ".debug_macinfo", ".zdebug_macinfo" },
288 { ".debug_macro", ".zdebug_macro" },
289 { ".debug_str", ".zdebug_str" },
290 { ".debug_line_str", ".zdebug_line_str" },
291 { ".debug_ranges", ".zdebug_ranges" },
292 { ".debug_rnglists", ".zdebug_rnglists" },
293 { ".debug_types", ".zdebug_types" },
294 { ".debug_addr", ".zdebug_addr" },
295 { ".debug_frame", ".zdebug_frame" },
296 { ".eh_frame", NULL
},
297 { ".gdb_index", ".zgdb_index" },
298 { ".debug_names", ".zdebug_names" },
299 { ".debug_aranges", ".zdebug_aranges" },
303 /* List of DWO/DWP sections. */
305 static const struct dwop_section_names
307 struct dwarf2_section_names abbrev_dwo
;
308 struct dwarf2_section_names info_dwo
;
309 struct dwarf2_section_names line_dwo
;
310 struct dwarf2_section_names loc_dwo
;
311 struct dwarf2_section_names loclists_dwo
;
312 struct dwarf2_section_names macinfo_dwo
;
313 struct dwarf2_section_names macro_dwo
;
314 struct dwarf2_section_names str_dwo
;
315 struct dwarf2_section_names str_offsets_dwo
;
316 struct dwarf2_section_names types_dwo
;
317 struct dwarf2_section_names cu_index
;
318 struct dwarf2_section_names tu_index
;
322 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
323 { ".debug_info.dwo", ".zdebug_info.dwo" },
324 { ".debug_line.dwo", ".zdebug_line.dwo" },
325 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
326 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
327 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
328 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
329 { ".debug_str.dwo", ".zdebug_str.dwo" },
330 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
331 { ".debug_types.dwo", ".zdebug_types.dwo" },
332 { ".debug_cu_index", ".zdebug_cu_index" },
333 { ".debug_tu_index", ".zdebug_tu_index" },
336 /* local data types */
338 /* The data in a compilation unit header, after target2host
339 translation, looks like this. */
340 struct comp_unit_head
344 unsigned char addr_size
;
345 unsigned char signed_addr_p
;
346 sect_offset abbrev_sect_off
;
348 /* Size of file offsets; either 4 or 8. */
349 unsigned int offset_size
;
351 /* Size of the length field; either 4 or 12. */
352 unsigned int initial_length_size
;
354 enum dwarf_unit_type unit_type
;
356 /* Offset to the first byte of this compilation unit header in the
357 .debug_info section, for resolving relative reference dies. */
358 sect_offset sect_off
;
360 /* Offset to first die in this cu from the start of the cu.
361 This will be the first byte following the compilation unit header. */
362 cu_offset first_die_cu_offset
;
365 /* 64-bit signature of this unit. For type units, it denotes the signature of
366 the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5).
367 Also used in DWARF 5, to denote the dwo id when the unit type is
368 DW_UT_skeleton or DW_UT_split_compile. */
371 /* For types, offset in the type's DIE of the type defined by this TU. */
372 cu_offset type_cu_offset_in_tu
;
375 /* Type used for delaying computation of method physnames.
376 See comments for compute_delayed_physnames. */
377 struct delayed_method_info
379 /* The type to which the method is attached, i.e., its parent class. */
382 /* The index of the method in the type's function fieldlists. */
385 /* The index of the method in the fieldlist. */
388 /* The name of the DIE. */
391 /* The DIE associated with this method. */
392 struct die_info
*die
;
395 /* Internal state when decoding a particular compilation unit. */
398 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
401 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
403 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
404 Create the set of symtabs used by this TU, or if this TU is sharing
405 symtabs with another TU and the symtabs have already been created
406 then restore those symtabs in the line header.
407 We don't need the pc/line-number mapping for type units. */
408 void setup_type_unit_groups (struct die_info
*die
);
410 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
411 buildsym_compunit constructor. */
412 struct compunit_symtab
*start_symtab (const char *name
,
413 const char *comp_dir
,
416 /* Reset the builder. */
417 void reset_builder () { m_builder
.reset (); }
419 /* The header of the compilation unit. */
420 struct comp_unit_head header
{};
422 /* Base address of this compilation unit. */
423 CORE_ADDR base_address
= 0;
425 /* Non-zero if base_address has been set. */
428 /* The language we are debugging. */
429 enum language language
= language_unknown
;
430 const struct language_defn
*language_defn
= nullptr;
432 const char *producer
= nullptr;
435 /* The symtab builder for this CU. This is only non-NULL when full
436 symbols are being read. */
437 std::unique_ptr
<buildsym_compunit
> m_builder
;
440 /* The generic symbol table building routines have separate lists for
441 file scope symbols and all all other scopes (local scopes). So
442 we need to select the right one to pass to add_symbol_to_list().
443 We do it by keeping a pointer to the correct list in list_in_scope.
445 FIXME: The original dwarf code just treated the file scope as the
446 first local scope, and all other local scopes as nested local
447 scopes, and worked fine. Check to see if we really need to
448 distinguish these in buildsym.c. */
449 struct pending
**list_in_scope
= nullptr;
451 /* Hash table holding all the loaded partial DIEs
452 with partial_die->offset.SECT_OFF as hash. */
453 htab_t partial_dies
= nullptr;
455 /* Storage for things with the same lifetime as this read-in compilation
456 unit, including partial DIEs. */
457 auto_obstack comp_unit_obstack
;
459 /* When multiple dwarf2_cu structures are living in memory, this field
460 chains them all together, so that they can be released efficiently.
461 We will probably also want a generation counter so that most-recently-used
462 compilation units are cached... */
463 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
465 /* Backlink to our per_cu entry. */
466 struct dwarf2_per_cu_data
*per_cu
;
468 /* How many compilation units ago was this CU last referenced? */
471 /* A hash table of DIE cu_offset for following references with
472 die_info->offset.sect_off as hash. */
473 htab_t die_hash
= nullptr;
475 /* Full DIEs if read in. */
476 struct die_info
*dies
= nullptr;
478 /* A set of pointers to dwarf2_per_cu_data objects for compilation
479 units referenced by this one. Only set during full symbol processing;
480 partial symbol tables do not have dependencies. */
481 htab_t dependencies
= nullptr;
483 /* Header data from the line table, during full symbol processing. */
484 struct line_header
*line_header
= nullptr;
485 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
486 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
487 this is the DW_TAG_compile_unit die for this CU. We'll hold on
488 to the line header as long as this DIE is being processed. See
489 process_die_scope. */
490 die_info
*line_header_die_owner
= nullptr;
492 /* A list of methods which need to have physnames computed
493 after all type information has been read. */
494 std::vector
<delayed_method_info
> method_list
;
496 /* To be copied to symtab->call_site_htab. */
497 htab_t call_site_htab
= nullptr;
499 /* Non-NULL if this CU came from a DWO file.
500 There is an invariant here that is important to remember:
501 Except for attributes copied from the top level DIE in the "main"
502 (or "stub") file in preparation for reading the DWO file
503 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
504 Either there isn't a DWO file (in which case this is NULL and the point
505 is moot), or there is and either we're not going to read it (in which
506 case this is NULL) or there is and we are reading it (in which case this
508 struct dwo_unit
*dwo_unit
= nullptr;
510 /* The DW_AT_addr_base attribute if present, zero otherwise
511 (zero is a valid value though).
512 Note this value comes from the Fission stub CU/TU's DIE. */
513 ULONGEST addr_base
= 0;
515 /* The DW_AT_ranges_base attribute if present, zero otherwise
516 (zero is a valid value though).
517 Note this value comes from the Fission stub CU/TU's DIE.
518 Also note that the value is zero in the non-DWO case so this value can
519 be used without needing to know whether DWO files are in use or not.
520 N.B. This does not apply to DW_AT_ranges appearing in
521 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
522 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
523 DW_AT_ranges_base *would* have to be applied, and we'd have to care
524 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
525 ULONGEST ranges_base
= 0;
527 /* When reading debug info generated by older versions of rustc, we
528 have to rewrite some union types to be struct types with a
529 variant part. This rewriting must be done after the CU is fully
530 read in, because otherwise at the point of rewriting some struct
531 type might not have been fully processed. So, we keep a list of
532 all such types here and process them after expansion. */
533 std::vector
<struct type
*> rust_unions
;
535 /* Mark used when releasing cached dies. */
538 /* This CU references .debug_loc. See the symtab->locations_valid field.
539 This test is imperfect as there may exist optimized debug code not using
540 any location list and still facing inlining issues if handled as
541 unoptimized code. For a future better test see GCC PR other/32998. */
542 bool has_loclist
: 1;
544 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
545 if all the producer_is_* fields are valid. This information is cached
546 because profiling CU expansion showed excessive time spent in
547 producer_is_gxx_lt_4_6. */
548 bool checked_producer
: 1;
549 bool producer_is_gxx_lt_4_6
: 1;
550 bool producer_is_gcc_lt_4_3
: 1;
551 bool producer_is_icc
: 1;
552 bool producer_is_icc_lt_14
: 1;
553 bool producer_is_codewarrior
: 1;
555 /* When true, the file that we're processing is known to have
556 debugging info for C++ namespaces. GCC 3.3.x did not produce
557 this information, but later versions do. */
559 bool processing_has_namespace_info
: 1;
561 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
563 /* If this CU was inherited by another CU (via specification,
564 abstract_origin, etc), this is the ancestor CU. */
567 /* Get the buildsym_compunit for this CU. */
568 buildsym_compunit
*get_builder ()
570 /* If this CU has a builder associated with it, use that. */
571 if (m_builder
!= nullptr)
572 return m_builder
.get ();
574 /* Otherwise, search ancestors for a valid builder. */
575 if (ancestor
!= nullptr)
576 return ancestor
->get_builder ();
582 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
583 This includes type_unit_group and quick_file_names. */
585 struct stmt_list_hash
587 /* The DWO unit this table is from or NULL if there is none. */
588 struct dwo_unit
*dwo_unit
;
590 /* Offset in .debug_line or .debug_line.dwo. */
591 sect_offset line_sect_off
;
594 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
595 an object of this type. */
597 struct type_unit_group
599 /* dwarf2read.c's main "handle" on a TU symtab.
600 To simplify things we create an artificial CU that "includes" all the
601 type units using this stmt_list so that the rest of the code still has
602 a "per_cu" handle on the symtab.
603 This PER_CU is recognized by having no section. */
604 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
605 struct dwarf2_per_cu_data per_cu
;
607 /* The TUs that share this DW_AT_stmt_list entry.
608 This is added to while parsing type units to build partial symtabs,
609 and is deleted afterwards and not used again. */
610 std::vector
<signatured_type
*> *tus
;
612 /* The compunit symtab.
613 Type units in a group needn't all be defined in the same source file,
614 so we create an essentially anonymous symtab as the compunit symtab. */
615 struct compunit_symtab
*compunit_symtab
;
617 /* The data used to construct the hash key. */
618 struct stmt_list_hash hash
;
620 /* The number of symtabs from the line header.
621 The value here must match line_header.num_file_names. */
622 unsigned int num_symtabs
;
624 /* The symbol tables for this TU (obtained from the files listed in
626 WARNING: The order of entries here must match the order of entries
627 in the line header. After the first TU using this type_unit_group, the
628 line header for the subsequent TUs is recreated from this. This is done
629 because we need to use the same symtabs for each TU using the same
630 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
631 there's no guarantee the line header doesn't have duplicate entries. */
632 struct symtab
**symtabs
;
635 /* These sections are what may appear in a (real or virtual) DWO file. */
639 struct dwarf2_section_info abbrev
;
640 struct dwarf2_section_info line
;
641 struct dwarf2_section_info loc
;
642 struct dwarf2_section_info loclists
;
643 struct dwarf2_section_info macinfo
;
644 struct dwarf2_section_info macro
;
645 struct dwarf2_section_info str
;
646 struct dwarf2_section_info str_offsets
;
647 /* In the case of a virtual DWO file, these two are unused. */
648 struct dwarf2_section_info info
;
649 std::vector
<dwarf2_section_info
> types
;
652 /* CUs/TUs in DWP/DWO files. */
656 /* Backlink to the containing struct dwo_file. */
657 struct dwo_file
*dwo_file
;
659 /* The "id" that distinguishes this CU/TU.
660 .debug_info calls this "dwo_id", .debug_types calls this "signature".
661 Since signatures came first, we stick with it for consistency. */
664 /* The section this CU/TU lives in, in the DWO file. */
665 struct dwarf2_section_info
*section
;
667 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
668 sect_offset sect_off
;
671 /* For types, offset in the type's DIE of the type defined by this TU. */
672 cu_offset type_offset_in_tu
;
675 /* include/dwarf2.h defines the DWP section codes.
676 It defines a max value but it doesn't define a min value, which we
677 use for error checking, so provide one. */
679 enum dwp_v2_section_ids
684 /* Data for one DWO file.
686 This includes virtual DWO files (a virtual DWO file is a DWO file as it
687 appears in a DWP file). DWP files don't really have DWO files per se -
688 comdat folding of types "loses" the DWO file they came from, and from
689 a high level view DWP files appear to contain a mass of random types.
690 However, to maintain consistency with the non-DWP case we pretend DWP
691 files contain virtual DWO files, and we assign each TU with one virtual
692 DWO file (generally based on the line and abbrev section offsets -
693 a heuristic that seems to work in practice). */
697 dwo_file () = default;
698 DISABLE_COPY_AND_ASSIGN (dwo_file
);
700 /* The DW_AT_GNU_dwo_name attribute.
701 For virtual DWO files the name is constructed from the section offsets
702 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
703 from related CU+TUs. */
704 const char *dwo_name
= nullptr;
706 /* The DW_AT_comp_dir attribute. */
707 const char *comp_dir
= nullptr;
709 /* The bfd, when the file is open. Otherwise this is NULL.
710 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
711 gdb_bfd_ref_ptr dbfd
;
713 /* The sections that make up this DWO file.
714 Remember that for virtual DWO files in DWP V2, these are virtual
715 sections (for lack of a better name). */
716 struct dwo_sections sections
{};
718 /* The CUs in the file.
719 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
720 an extension to handle LLVM's Link Time Optimization output (where
721 multiple source files may be compiled into a single object/dwo pair). */
724 /* Table of TUs in the file.
725 Each element is a struct dwo_unit. */
729 /* These sections are what may appear in a DWP file. */
733 /* These are used by both DWP version 1 and 2. */
734 struct dwarf2_section_info str
;
735 struct dwarf2_section_info cu_index
;
736 struct dwarf2_section_info tu_index
;
738 /* These are only used by DWP version 2 files.
739 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
740 sections are referenced by section number, and are not recorded here.
741 In DWP version 2 there is at most one copy of all these sections, each
742 section being (effectively) comprised of the concatenation of all of the
743 individual sections that exist in the version 1 format.
744 To keep the code simple we treat each of these concatenated pieces as a
745 section itself (a virtual section?). */
746 struct dwarf2_section_info abbrev
;
747 struct dwarf2_section_info info
;
748 struct dwarf2_section_info line
;
749 struct dwarf2_section_info loc
;
750 struct dwarf2_section_info macinfo
;
751 struct dwarf2_section_info macro
;
752 struct dwarf2_section_info str_offsets
;
753 struct dwarf2_section_info types
;
756 /* These sections are what may appear in a virtual DWO file in DWP version 1.
757 A virtual DWO file is a DWO file as it appears in a DWP file. */
759 struct virtual_v1_dwo_sections
761 struct dwarf2_section_info abbrev
;
762 struct dwarf2_section_info line
;
763 struct dwarf2_section_info loc
;
764 struct dwarf2_section_info macinfo
;
765 struct dwarf2_section_info macro
;
766 struct dwarf2_section_info str_offsets
;
767 /* Each DWP hash table entry records one CU or one TU.
768 That is recorded here, and copied to dwo_unit.section. */
769 struct dwarf2_section_info info_or_types
;
772 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
773 In version 2, the sections of the DWO files are concatenated together
774 and stored in one section of that name. Thus each ELF section contains
775 several "virtual" sections. */
777 struct virtual_v2_dwo_sections
779 bfd_size_type abbrev_offset
;
780 bfd_size_type abbrev_size
;
782 bfd_size_type line_offset
;
783 bfd_size_type line_size
;
785 bfd_size_type loc_offset
;
786 bfd_size_type loc_size
;
788 bfd_size_type macinfo_offset
;
789 bfd_size_type macinfo_size
;
791 bfd_size_type macro_offset
;
792 bfd_size_type macro_size
;
794 bfd_size_type str_offsets_offset
;
795 bfd_size_type str_offsets_size
;
797 /* Each DWP hash table entry records one CU or one TU.
798 That is recorded here, and copied to dwo_unit.section. */
799 bfd_size_type info_or_types_offset
;
800 bfd_size_type info_or_types_size
;
803 /* Contents of DWP hash tables. */
805 struct dwp_hash_table
807 uint32_t version
, nr_columns
;
808 uint32_t nr_units
, nr_slots
;
809 const gdb_byte
*hash_table
, *unit_table
;
814 const gdb_byte
*indices
;
818 /* This is indexed by column number and gives the id of the section
820 #define MAX_NR_V2_DWO_SECTIONS \
821 (1 /* .debug_info or .debug_types */ \
822 + 1 /* .debug_abbrev */ \
823 + 1 /* .debug_line */ \
824 + 1 /* .debug_loc */ \
825 + 1 /* .debug_str_offsets */ \
826 + 1 /* .debug_macro or .debug_macinfo */)
827 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
828 const gdb_byte
*offsets
;
829 const gdb_byte
*sizes
;
834 /* Data for one DWP file. */
838 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
840 dbfd (std::move (abfd
))
844 /* Name of the file. */
847 /* File format version. */
851 gdb_bfd_ref_ptr dbfd
;
853 /* Section info for this file. */
854 struct dwp_sections sections
{};
856 /* Table of CUs in the file. */
857 const struct dwp_hash_table
*cus
= nullptr;
859 /* Table of TUs in the file. */
860 const struct dwp_hash_table
*tus
= nullptr;
862 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
863 htab_t loaded_cus
{};
864 htab_t loaded_tus
{};
866 /* Table to map ELF section numbers to their sections.
867 This is only needed for the DWP V1 file format. */
868 unsigned int num_sections
= 0;
869 asection
**elf_sections
= nullptr;
872 /* Struct used to pass misc. parameters to read_die_and_children, et
873 al. which are used for both .debug_info and .debug_types dies.
874 All parameters here are unchanging for the life of the call. This
875 struct exists to abstract away the constant parameters of die reading. */
877 struct die_reader_specs
879 /* The bfd of die_section. */
882 /* The CU of the DIE we are parsing. */
883 struct dwarf2_cu
*cu
;
885 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
886 struct dwo_file
*dwo_file
;
888 /* The section the die comes from.
889 This is either .debug_info or .debug_types, or the .dwo variants. */
890 struct dwarf2_section_info
*die_section
;
892 /* die_section->buffer. */
893 const gdb_byte
*buffer
;
895 /* The end of the buffer. */
896 const gdb_byte
*buffer_end
;
898 /* The value of the DW_AT_comp_dir attribute. */
899 const char *comp_dir
;
901 /* The abbreviation table to use when reading the DIEs. */
902 struct abbrev_table
*abbrev_table
;
905 /* Type of function passed to init_cutu_and_read_dies, et.al. */
906 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
907 const gdb_byte
*info_ptr
,
908 struct die_info
*comp_unit_die
,
912 /* dir_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5 and
914 typedef int dir_index
;
916 /* file_name_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5
918 typedef int file_name_index
;
922 file_entry () = default;
924 file_entry (const char *name_
, dir_index d_index_
,
925 unsigned int mod_time_
, unsigned int length_
)
928 mod_time (mod_time_
),
932 /* Return the include directory at D_INDEX stored in LH. Returns
933 NULL if D_INDEX is out of bounds. */
934 const char *include_dir (const line_header
*lh
) const;
936 /* The file name. Note this is an observing pointer. The memory is
937 owned by debug_line_buffer. */
940 /* The directory index (1-based). */
941 dir_index d_index
{};
943 unsigned int mod_time
{};
945 unsigned int length
{};
947 /* True if referenced by the Line Number Program. */
950 /* The associated symbol table, if any. */
951 struct symtab
*symtab
{};
954 /* The line number information for a compilation unit (found in the
955 .debug_line section) begins with a "statement program header",
956 which contains the following information. */
963 /* Add an entry to the include directory table. */
964 void add_include_dir (const char *include_dir
);
966 /* Add an entry to the file name table. */
967 void add_file_name (const char *name
, dir_index d_index
,
968 unsigned int mod_time
, unsigned int length
);
970 /* Return the include dir at INDEX (0-based in DWARF 5 and 1-based before).
971 Returns NULL if INDEX is out of bounds. */
972 const char *include_dir_at (dir_index index
) const
978 vec_index
= index
- 1;
979 if (vec_index
< 0 || vec_index
>= m_include_dirs
.size ())
981 return m_include_dirs
[vec_index
];
984 bool is_valid_file_index (int file_index
)
987 return 0 <= file_index
&& file_index
< file_names_size ();
988 return 1 <= file_index
&& file_index
<= file_names_size ();
991 /* Return the file name at INDEX (0-based in DWARF 5 and 1-based before).
992 Returns NULL if INDEX is out of bounds. */
993 file_entry
*file_name_at (file_name_index index
)
999 vec_index
= index
- 1;
1000 if (vec_index
< 0 || vec_index
>= m_file_names
.size ())
1002 return &m_file_names
[vec_index
];
1005 /* The indexes are 0-based in DWARF 5 and 1-based in DWARF 4. Therefore,
1006 this method should only be used to iterate through all file entries in an
1007 index-agnostic manner. */
1008 std::vector
<file_entry
> &file_names ()
1009 { return m_file_names
; }
1011 /* Offset of line number information in .debug_line section. */
1012 sect_offset sect_off
{};
1014 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1015 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1017 unsigned int total_length
{};
1018 unsigned short version
{};
1019 unsigned int header_length
{};
1020 unsigned char minimum_instruction_length
{};
1021 unsigned char maximum_ops_per_instruction
{};
1022 unsigned char default_is_stmt
{};
1024 unsigned char line_range
{};
1025 unsigned char opcode_base
{};
1027 /* standard_opcode_lengths[i] is the number of operands for the
1028 standard opcode whose value is i. This means that
1029 standard_opcode_lengths[0] is unused, and the last meaningful
1030 element is standard_opcode_lengths[opcode_base - 1]. */
1031 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1033 int file_names_size ()
1034 { return m_file_names
.size(); }
1036 /* The start and end of the statement program following this
1037 header. These point into dwarf2_per_objfile->line_buffer. */
1038 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1041 /* The include_directories table. Note these are observing
1042 pointers. The memory is owned by debug_line_buffer. */
1043 std::vector
<const char *> m_include_dirs
;
1045 /* The file_names table. This is private because the meaning of indexes
1046 differs among DWARF versions (The first valid index is 1 in DWARF 4 and
1047 before, and is 0 in DWARF 5 and later). So the client should use
1048 file_name_at method for access. */
1049 std::vector
<file_entry
> m_file_names
;
1052 typedef std::unique_ptr
<line_header
> line_header_up
;
1055 file_entry::include_dir (const line_header
*lh
) const
1057 return lh
->include_dir_at (d_index
);
1060 /* When we construct a partial symbol table entry we only
1061 need this much information. */
1062 struct partial_die_info
: public allocate_on_obstack
1064 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1066 /* Disable assign but still keep copy ctor, which is needed
1067 load_partial_dies. */
1068 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1070 /* Adjust the partial die before generating a symbol for it. This
1071 function may set the is_external flag or change the DIE's
1073 void fixup (struct dwarf2_cu
*cu
);
1075 /* Read a minimal amount of information into the minimal die
1077 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1078 const struct abbrev_info
&abbrev
,
1079 const gdb_byte
*info_ptr
);
1081 /* Offset of this DIE. */
1082 const sect_offset sect_off
;
1084 /* DWARF-2 tag for this DIE. */
1085 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1087 /* Assorted flags describing the data found in this DIE. */
1088 const unsigned int has_children
: 1;
1090 unsigned int is_external
: 1;
1091 unsigned int is_declaration
: 1;
1092 unsigned int has_type
: 1;
1093 unsigned int has_specification
: 1;
1094 unsigned int has_pc_info
: 1;
1095 unsigned int may_be_inlined
: 1;
1097 /* This DIE has been marked DW_AT_main_subprogram. */
1098 unsigned int main_subprogram
: 1;
1100 /* Flag set if the SCOPE field of this structure has been
1102 unsigned int scope_set
: 1;
1104 /* Flag set if the DIE has a byte_size attribute. */
1105 unsigned int has_byte_size
: 1;
1107 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1108 unsigned int has_const_value
: 1;
1110 /* Flag set if any of the DIE's children are template arguments. */
1111 unsigned int has_template_arguments
: 1;
1113 /* Flag set if fixup has been called on this die. */
1114 unsigned int fixup_called
: 1;
1116 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1117 unsigned int is_dwz
: 1;
1119 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1120 unsigned int spec_is_dwz
: 1;
1122 /* The name of this DIE. Normally the value of DW_AT_name, but
1123 sometimes a default name for unnamed DIEs. */
1124 const char *name
= nullptr;
1126 /* The linkage name, if present. */
1127 const char *linkage_name
= nullptr;
1129 /* The scope to prepend to our children. This is generally
1130 allocated on the comp_unit_obstack, so will disappear
1131 when this compilation unit leaves the cache. */
1132 const char *scope
= nullptr;
1134 /* Some data associated with the partial DIE. The tag determines
1135 which field is live. */
1138 /* The location description associated with this DIE, if any. */
1139 struct dwarf_block
*locdesc
;
1140 /* The offset of an import, for DW_TAG_imported_unit. */
1141 sect_offset sect_off
;
1144 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1145 CORE_ADDR lowpc
= 0;
1146 CORE_ADDR highpc
= 0;
1148 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1149 DW_AT_sibling, if any. */
1150 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1151 could return DW_AT_sibling values to its caller load_partial_dies. */
1152 const gdb_byte
*sibling
= nullptr;
1154 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1155 DW_AT_specification (or DW_AT_abstract_origin or
1156 DW_AT_extension). */
1157 sect_offset spec_offset
{};
1159 /* Pointers to this DIE's parent, first child, and next sibling,
1161 struct partial_die_info
*die_parent
= nullptr;
1162 struct partial_die_info
*die_child
= nullptr;
1163 struct partial_die_info
*die_sibling
= nullptr;
1165 friend struct partial_die_info
*
1166 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1169 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1170 partial_die_info (sect_offset sect_off
)
1171 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1175 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1177 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1182 has_specification
= 0;
1185 main_subprogram
= 0;
1188 has_const_value
= 0;
1189 has_template_arguments
= 0;
1196 /* This data structure holds the information of an abbrev. */
1199 unsigned int number
; /* number identifying abbrev */
1200 enum dwarf_tag tag
; /* dwarf tag */
1201 unsigned short has_children
; /* boolean */
1202 unsigned short num_attrs
; /* number of attributes */
1203 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1204 struct abbrev_info
*next
; /* next in chain */
1209 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1210 ENUM_BITFIELD(dwarf_form
) form
: 16;
1212 /* It is valid only if FORM is DW_FORM_implicit_const. */
1213 LONGEST implicit_const
;
1216 /* Size of abbrev_table.abbrev_hash_table. */
1217 #define ABBREV_HASH_SIZE 121
1219 /* Top level data structure to contain an abbreviation table. */
1223 explicit abbrev_table (sect_offset off
)
1227 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1228 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1231 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1233 /* Allocate space for a struct abbrev_info object in
1235 struct abbrev_info
*alloc_abbrev ();
1237 /* Add an abbreviation to the table. */
1238 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1240 /* Look up an abbrev in the table.
1241 Returns NULL if the abbrev is not found. */
1243 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1246 /* Where the abbrev table came from.
1247 This is used as a sanity check when the table is used. */
1248 const sect_offset sect_off
;
1250 /* Storage for the abbrev table. */
1251 auto_obstack abbrev_obstack
;
1255 /* Hash table of abbrevs.
1256 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1257 It could be statically allocated, but the previous code didn't so we
1259 struct abbrev_info
**m_abbrevs
;
1262 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1264 /* Attributes have a name and a value. */
1267 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1268 ENUM_BITFIELD(dwarf_form
) form
: 15;
1270 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1271 field should be in u.str (existing only for DW_STRING) but it is kept
1272 here for better struct attribute alignment. */
1273 unsigned int string_is_canonical
: 1;
1278 struct dwarf_block
*blk
;
1287 /* This data structure holds a complete die structure. */
1290 /* DWARF-2 tag for this DIE. */
1291 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1293 /* Number of attributes */
1294 unsigned char num_attrs
;
1296 /* True if we're presently building the full type name for the
1297 type derived from this DIE. */
1298 unsigned char building_fullname
: 1;
1300 /* True if this die is in process. PR 16581. */
1301 unsigned char in_process
: 1;
1304 unsigned int abbrev
;
1306 /* Offset in .debug_info or .debug_types section. */
1307 sect_offset sect_off
;
1309 /* The dies in a compilation unit form an n-ary tree. PARENT
1310 points to this die's parent; CHILD points to the first child of
1311 this node; and all the children of a given node are chained
1312 together via their SIBLING fields. */
1313 struct die_info
*child
; /* Its first child, if any. */
1314 struct die_info
*sibling
; /* Its next sibling, if any. */
1315 struct die_info
*parent
; /* Its parent, if any. */
1317 /* An array of attributes, with NUM_ATTRS elements. There may be
1318 zero, but it's not common and zero-sized arrays are not
1319 sufficiently portable C. */
1320 struct attribute attrs
[1];
1323 /* Get at parts of an attribute structure. */
1325 #define DW_STRING(attr) ((attr)->u.str)
1326 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1327 #define DW_UNSND(attr) ((attr)->u.unsnd)
1328 #define DW_BLOCK(attr) ((attr)->u.blk)
1329 #define DW_SND(attr) ((attr)->u.snd)
1330 #define DW_ADDR(attr) ((attr)->u.addr)
1331 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1333 /* Blocks are a bunch of untyped bytes. */
1338 /* Valid only if SIZE is not zero. */
1339 const gdb_byte
*data
;
1342 #ifndef ATTR_ALLOC_CHUNK
1343 #define ATTR_ALLOC_CHUNK 4
1346 /* Allocate fields for structs, unions and enums in this size. */
1347 #ifndef DW_FIELD_ALLOC_CHUNK
1348 #define DW_FIELD_ALLOC_CHUNK 4
1351 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1352 but this would require a corresponding change in unpack_field_as_long
1354 static int bits_per_byte
= 8;
1356 /* When reading a variant or variant part, we track a bit more
1357 information about the field, and store it in an object of this
1360 struct variant_field
1362 /* If we see a DW_TAG_variant, then this will be the discriminant
1364 ULONGEST discriminant_value
;
1365 /* If we see a DW_TAG_variant, then this will be set if this is the
1367 bool default_branch
;
1368 /* While reading a DW_TAG_variant_part, this will be set if this
1369 field is the discriminant. */
1370 bool is_discriminant
;
1375 int accessibility
= 0;
1377 /* Extra information to describe a variant or variant part. */
1378 struct variant_field variant
{};
1379 struct field field
{};
1384 const char *name
= nullptr;
1385 std::vector
<struct fn_field
> fnfields
;
1388 /* The routines that read and process dies for a C struct or C++ class
1389 pass lists of data member fields and lists of member function fields
1390 in an instance of a field_info structure, as defined below. */
1393 /* List of data member and baseclasses fields. */
1394 std::vector
<struct nextfield
> fields
;
1395 std::vector
<struct nextfield
> baseclasses
;
1397 /* Number of fields (including baseclasses). */
1400 /* Set if the accessibility of one of the fields is not public. */
1401 int non_public_fields
= 0;
1403 /* Member function fieldlist array, contains name of possibly overloaded
1404 member function, number of overloaded member functions and a pointer
1405 to the head of the member function field chain. */
1406 std::vector
<struct fnfieldlist
> fnfieldlists
;
1408 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1409 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1410 std::vector
<struct decl_field
> typedef_field_list
;
1412 /* Nested types defined by this class and the number of elements in this
1414 std::vector
<struct decl_field
> nested_types_list
;
1417 /* One item on the queue of compilation units to read in full symbols
1419 struct dwarf2_queue_item
1421 struct dwarf2_per_cu_data
*per_cu
;
1422 enum language pretend_language
;
1423 struct dwarf2_queue_item
*next
;
1426 /* The current queue. */
1427 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1429 /* Loaded secondary compilation units are kept in memory until they
1430 have not been referenced for the processing of this many
1431 compilation units. Set this to zero to disable caching. Cache
1432 sizes of up to at least twenty will improve startup time for
1433 typical inter-CU-reference binaries, at an obvious memory cost. */
1434 static int dwarf_max_cache_age
= 5;
1436 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1437 struct cmd_list_element
*c
, const char *value
)
1439 fprintf_filtered (file
, _("The upper bound on the age of cached "
1440 "DWARF compilation units is %s.\n"),
1444 /* local function prototypes */
1446 static const char *get_section_name (const struct dwarf2_section_info
*);
1448 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1450 static void dwarf2_find_base_address (struct die_info
*die
,
1451 struct dwarf2_cu
*cu
);
1453 static struct partial_symtab
*create_partial_symtab
1454 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1456 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1457 const gdb_byte
*info_ptr
,
1458 struct die_info
*type_unit_die
,
1459 int has_children
, void *data
);
1461 static void dwarf2_build_psymtabs_hard
1462 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1464 static void scan_partial_symbols (struct partial_die_info
*,
1465 CORE_ADDR
*, CORE_ADDR
*,
1466 int, struct dwarf2_cu
*);
1468 static void add_partial_symbol (struct partial_die_info
*,
1469 struct dwarf2_cu
*);
1471 static void add_partial_namespace (struct partial_die_info
*pdi
,
1472 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1473 int set_addrmap
, struct dwarf2_cu
*cu
);
1475 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1476 CORE_ADDR
*highpc
, int set_addrmap
,
1477 struct dwarf2_cu
*cu
);
1479 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1480 struct dwarf2_cu
*cu
);
1482 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1483 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1484 int need_pc
, struct dwarf2_cu
*cu
);
1486 static void dwarf2_read_symtab (struct partial_symtab
*,
1489 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1491 static abbrev_table_up abbrev_table_read_table
1492 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1495 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1497 static struct partial_die_info
*load_partial_dies
1498 (const struct die_reader_specs
*, const gdb_byte
*, int);
1500 /* A pair of partial_die_info and compilation unit. */
1501 struct cu_partial_die_info
1503 /* The compilation unit of the partial_die_info. */
1504 struct dwarf2_cu
*cu
;
1505 /* A partial_die_info. */
1506 struct partial_die_info
*pdi
;
1508 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1514 cu_partial_die_info () = delete;
1517 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1518 struct dwarf2_cu
*);
1520 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1521 struct attribute
*, struct attr_abbrev
*,
1524 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1526 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1528 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1530 /* Read the next three bytes (little-endian order) as an unsigned integer. */
1531 static unsigned int read_3_bytes (bfd
*, const gdb_byte
*);
1533 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1535 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1537 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1540 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1542 static LONGEST read_checked_initial_length_and_offset
1543 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1544 unsigned int *, unsigned int *);
1546 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1547 const struct comp_unit_head
*,
1550 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1552 static sect_offset read_abbrev_offset
1553 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1554 struct dwarf2_section_info
*, sect_offset
);
1556 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1558 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1560 static const char *read_indirect_string
1561 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1562 const struct comp_unit_head
*, unsigned int *);
1564 static const char *read_indirect_line_string
1565 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1566 const struct comp_unit_head
*, unsigned int *);
1568 static const char *read_indirect_string_at_offset
1569 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1570 LONGEST str_offset
);
1572 static const char *read_indirect_string_from_dwz
1573 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1575 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1577 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1581 static const char *read_str_index (const struct die_reader_specs
*reader
,
1582 ULONGEST str_index
);
1584 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1586 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1587 struct dwarf2_cu
*);
1589 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1592 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1593 struct dwarf2_cu
*cu
);
1595 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1597 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1598 struct dwarf2_cu
*cu
);
1600 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1602 static struct die_info
*die_specification (struct die_info
*die
,
1603 struct dwarf2_cu
**);
1605 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1606 struct dwarf2_cu
*cu
);
1608 static void dwarf_decode_lines (struct line_header
*, const char *,
1609 struct dwarf2_cu
*, struct partial_symtab
*,
1610 CORE_ADDR
, int decode_mapping
);
1612 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1615 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1616 struct dwarf2_cu
*, struct symbol
* = NULL
);
1618 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1619 struct dwarf2_cu
*);
1621 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1624 struct obstack
*obstack
,
1625 struct dwarf2_cu
*cu
, LONGEST
*value
,
1626 const gdb_byte
**bytes
,
1627 struct dwarf2_locexpr_baton
**baton
);
1629 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1631 static int need_gnat_info (struct dwarf2_cu
*);
1633 static struct type
*die_descriptive_type (struct die_info
*,
1634 struct dwarf2_cu
*);
1636 static void set_descriptive_type (struct type
*, struct die_info
*,
1637 struct dwarf2_cu
*);
1639 static struct type
*die_containing_type (struct die_info
*,
1640 struct dwarf2_cu
*);
1642 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1643 struct dwarf2_cu
*);
1645 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1647 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1649 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1651 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1652 const char *suffix
, int physname
,
1653 struct dwarf2_cu
*cu
);
1655 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1657 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1659 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1661 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1663 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1665 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1667 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1668 struct dwarf2_cu
*, struct partial_symtab
*);
1670 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1671 values. Keep the items ordered with increasing constraints compliance. */
1674 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1675 PC_BOUNDS_NOT_PRESENT
,
1677 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1678 were present but they do not form a valid range of PC addresses. */
1681 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1684 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1688 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1689 CORE_ADDR
*, CORE_ADDR
*,
1691 struct partial_symtab
*);
1693 static void get_scope_pc_bounds (struct die_info
*,
1694 CORE_ADDR
*, CORE_ADDR
*,
1695 struct dwarf2_cu
*);
1697 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1698 CORE_ADDR
, struct dwarf2_cu
*);
1700 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1701 struct dwarf2_cu
*);
1703 static void dwarf2_attach_fields_to_type (struct field_info
*,
1704 struct type
*, struct dwarf2_cu
*);
1706 static void dwarf2_add_member_fn (struct field_info
*,
1707 struct die_info
*, struct type
*,
1708 struct dwarf2_cu
*);
1710 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1712 struct dwarf2_cu
*);
1714 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1716 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1718 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1720 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1722 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1724 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1726 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1728 static struct type
*read_module_type (struct die_info
*die
,
1729 struct dwarf2_cu
*cu
);
1731 static const char *namespace_name (struct die_info
*die
,
1732 int *is_anonymous
, struct dwarf2_cu
*);
1734 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1736 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1738 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1739 struct dwarf2_cu
*);
1741 static struct die_info
*read_die_and_siblings_1
1742 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1745 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1746 const gdb_byte
*info_ptr
,
1747 const gdb_byte
**new_info_ptr
,
1748 struct die_info
*parent
);
1750 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1751 struct die_info
**, const gdb_byte
*,
1754 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1755 struct die_info
**, const gdb_byte
*,
1758 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1760 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1763 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1765 static const char *dwarf2_full_name (const char *name
,
1766 struct die_info
*die
,
1767 struct dwarf2_cu
*cu
);
1769 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1770 struct dwarf2_cu
*cu
);
1772 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1773 struct dwarf2_cu
**);
1775 static const char *dwarf_tag_name (unsigned int);
1777 static const char *dwarf_attr_name (unsigned int);
1779 static const char *dwarf_unit_type_name (int unit_type
);
1781 static const char *dwarf_form_name (unsigned int);
1783 static const char *dwarf_bool_name (unsigned int);
1785 static const char *dwarf_type_encoding_name (unsigned int);
1787 static struct die_info
*sibling_die (struct die_info
*);
1789 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1791 static void dump_die_for_error (struct die_info
*);
1793 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1796 /*static*/ void dump_die (struct die_info
*, int max_level
);
1798 static void store_in_ref_table (struct die_info
*,
1799 struct dwarf2_cu
*);
1801 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1803 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1805 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1806 const struct attribute
*,
1807 struct dwarf2_cu
**);
1809 static struct die_info
*follow_die_ref (struct die_info
*,
1810 const struct attribute
*,
1811 struct dwarf2_cu
**);
1813 static struct die_info
*follow_die_sig (struct die_info
*,
1814 const struct attribute
*,
1815 struct dwarf2_cu
**);
1817 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1818 struct dwarf2_cu
*);
1820 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1821 const struct attribute
*,
1822 struct dwarf2_cu
*);
1824 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1826 static void read_signatured_type (struct signatured_type
*);
1828 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1829 struct die_info
*die
, struct dwarf2_cu
*cu
,
1830 struct dynamic_prop
*prop
, struct type
*type
);
1832 /* memory allocation interface */
1834 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1836 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1838 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1840 static int attr_form_is_block (const struct attribute
*);
1842 static int attr_form_is_section_offset (const struct attribute
*);
1844 static int attr_form_is_constant (const struct attribute
*);
1846 static int attr_form_is_ref (const struct attribute
*);
1848 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1849 struct dwarf2_loclist_baton
*baton
,
1850 const struct attribute
*attr
);
1852 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1854 struct dwarf2_cu
*cu
,
1857 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1858 const gdb_byte
*info_ptr
,
1859 struct abbrev_info
*abbrev
);
1861 static hashval_t
partial_die_hash (const void *item
);
1863 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1865 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1866 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1867 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1869 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1870 struct die_info
*comp_unit_die
,
1871 enum language pretend_language
);
1873 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1875 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1877 static struct type
*set_die_type (struct die_info
*, struct type
*,
1878 struct dwarf2_cu
*);
1880 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1882 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1884 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1887 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1890 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1893 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1894 struct dwarf2_per_cu_data
*);
1896 static void dwarf2_mark (struct dwarf2_cu
*);
1898 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1900 static struct type
*get_die_type_at_offset (sect_offset
,
1901 struct dwarf2_per_cu_data
*);
1903 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1905 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1906 enum language pretend_language
);
1908 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1910 static struct type
*dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
);
1911 static struct type
*dwarf2_per_cu_addr_sized_int_type
1912 (struct dwarf2_per_cu_data
*per_cu
, bool unsigned_p
);
1914 /* Class, the destructor of which frees all allocated queue entries. This
1915 will only have work to do if an error was thrown while processing the
1916 dwarf. If no error was thrown then the queue entries should have all
1917 been processed, and freed, as we went along. */
1919 class dwarf2_queue_guard
1922 dwarf2_queue_guard () = default;
1924 /* Free any entries remaining on the queue. There should only be
1925 entries left if we hit an error while processing the dwarf. */
1926 ~dwarf2_queue_guard ()
1928 struct dwarf2_queue_item
*item
, *last
;
1930 item
= dwarf2_queue
;
1933 /* Anything still marked queued is likely to be in an
1934 inconsistent state, so discard it. */
1935 if (item
->per_cu
->queued
)
1937 if (item
->per_cu
->cu
!= NULL
)
1938 free_one_cached_comp_unit (item
->per_cu
);
1939 item
->per_cu
->queued
= 0;
1947 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1951 /* The return type of find_file_and_directory. Note, the enclosed
1952 string pointers are only valid while this object is valid. */
1954 struct file_and_directory
1956 /* The filename. This is never NULL. */
1959 /* The compilation directory. NULL if not known. If we needed to
1960 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1961 points directly to the DW_AT_comp_dir string attribute owned by
1962 the obstack that owns the DIE. */
1963 const char *comp_dir
;
1965 /* If we needed to build a new string for comp_dir, this is what
1966 owns the storage. */
1967 std::string comp_dir_storage
;
1970 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1971 struct dwarf2_cu
*cu
);
1973 static char *file_full_name (int file
, struct line_header
*lh
,
1974 const char *comp_dir
);
1976 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1977 enum class rcuh_kind
{ COMPILE
, TYPE
};
1979 static const gdb_byte
*read_and_check_comp_unit_head
1980 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1981 struct comp_unit_head
*header
,
1982 struct dwarf2_section_info
*section
,
1983 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1984 rcuh_kind section_kind
);
1986 static void init_cutu_and_read_dies
1987 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1988 int use_existing_cu
, int keep
, bool skip_partial
,
1989 die_reader_func_ftype
*die_reader_func
, void *data
);
1991 static void init_cutu_and_read_dies_simple
1992 (struct dwarf2_per_cu_data
*this_cu
,
1993 die_reader_func_ftype
*die_reader_func
, void *data
);
1995 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1997 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1999 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2000 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2001 struct dwp_file
*dwp_file
, const char *comp_dir
,
2002 ULONGEST signature
, int is_debug_types
);
2004 static struct dwp_file
*get_dwp_file
2005 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2007 static struct dwo_unit
*lookup_dwo_comp_unit
2008 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2010 static struct dwo_unit
*lookup_dwo_type_unit
2011 (struct signatured_type
*, const char *, const char *);
2013 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2015 /* A unique pointer to a dwo_file. */
2017 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
2019 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2021 static void check_producer (struct dwarf2_cu
*cu
);
2023 static void free_line_header_voidp (void *arg
);
2025 /* Various complaints about symbol reading that don't abort the process. */
2028 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2030 complaint (_("statement list doesn't fit in .debug_line section"));
2034 dwarf2_debug_line_missing_file_complaint (void)
2036 complaint (_(".debug_line section has line data without a file"));
2040 dwarf2_debug_line_missing_end_sequence_complaint (void)
2042 complaint (_(".debug_line section has line "
2043 "program sequence without an end"));
2047 dwarf2_complex_location_expr_complaint (void)
2049 complaint (_("location expression too complex"));
2053 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2056 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2061 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2063 complaint (_("debug info runs off end of %s section"
2065 get_section_name (section
),
2066 get_section_file_name (section
));
2070 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2072 complaint (_("macro debug info contains a "
2073 "malformed macro definition:\n`%s'"),
2078 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2080 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2084 /* Hash function for line_header_hash. */
2087 line_header_hash (const struct line_header
*ofs
)
2089 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2092 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2095 line_header_hash_voidp (const void *item
)
2097 const struct line_header
*ofs
= (const struct line_header
*) item
;
2099 return line_header_hash (ofs
);
2102 /* Equality function for line_header_hash. */
2105 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2107 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2108 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2110 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2111 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2116 /* Read the given attribute value as an address, taking the attribute's
2117 form into account. */
2120 attr_value_as_address (struct attribute
*attr
)
2124 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_addrx
2125 && attr
->form
!= DW_FORM_GNU_addr_index
)
2127 /* Aside from a few clearly defined exceptions, attributes that
2128 contain an address must always be in DW_FORM_addr form.
2129 Unfortunately, some compilers happen to be violating this
2130 requirement by encoding addresses using other forms, such
2131 as DW_FORM_data4 for example. For those broken compilers,
2132 we try to do our best, without any guarantee of success,
2133 to interpret the address correctly. It would also be nice
2134 to generate a complaint, but that would require us to maintain
2135 a list of legitimate cases where a non-address form is allowed,
2136 as well as update callers to pass in at least the CU's DWARF
2137 version. This is more overhead than what we're willing to
2138 expand for a pretty rare case. */
2139 addr
= DW_UNSND (attr
);
2142 addr
= DW_ADDR (attr
);
2147 /* See declaration. */
2149 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2150 const dwarf2_debug_sections
*names
,
2152 : objfile (objfile_
),
2153 can_copy (can_copy_
)
2156 names
= &dwarf2_elf_names
;
2158 bfd
*obfd
= objfile
->obfd
;
2160 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2161 locate_sections (obfd
, sec
, *names
);
2164 dwarf2_per_objfile::~dwarf2_per_objfile ()
2166 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2167 free_cached_comp_units ();
2169 if (quick_file_names_table
)
2170 htab_delete (quick_file_names_table
);
2172 if (line_header_hash
)
2173 htab_delete (line_header_hash
);
2175 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2176 per_cu
->imported_symtabs_free ();
2178 for (signatured_type
*sig_type
: all_type_units
)
2179 sig_type
->per_cu
.imported_symtabs_free ();
2181 /* Everything else should be on the objfile obstack. */
2184 /* See declaration. */
2187 dwarf2_per_objfile::free_cached_comp_units ()
2189 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2190 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2191 while (per_cu
!= NULL
)
2193 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2196 *last_chain
= next_cu
;
2201 /* A helper class that calls free_cached_comp_units on
2204 class free_cached_comp_units
2208 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2209 : m_per_objfile (per_objfile
)
2213 ~free_cached_comp_units ()
2215 m_per_objfile
->free_cached_comp_units ();
2218 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2222 dwarf2_per_objfile
*m_per_objfile
;
2225 /* Try to locate the sections we need for DWARF 2 debugging
2226 information and return true if we have enough to do something.
2227 NAMES points to the dwarf2 section names, or is NULL if the standard
2228 ELF names are used. CAN_COPY is true for formats where symbol
2229 interposition is possible and so symbol values must follow copy
2230 relocation rules. */
2233 dwarf2_has_info (struct objfile
*objfile
,
2234 const struct dwarf2_debug_sections
*names
,
2237 if (objfile
->flags
& OBJF_READNEVER
)
2240 struct dwarf2_per_objfile
*dwarf2_per_objfile
2241 = get_dwarf2_per_objfile (objfile
);
2243 if (dwarf2_per_objfile
== NULL
)
2244 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2248 return (!dwarf2_per_objfile
->info
.is_virtual
2249 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2250 && !dwarf2_per_objfile
->abbrev
.is_virtual
2251 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2254 /* Return the containing section of virtual section SECTION. */
2256 static struct dwarf2_section_info
*
2257 get_containing_section (const struct dwarf2_section_info
*section
)
2259 gdb_assert (section
->is_virtual
);
2260 return section
->s
.containing_section
;
2263 /* Return the bfd owner of SECTION. */
2266 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2268 if (section
->is_virtual
)
2270 section
= get_containing_section (section
);
2271 gdb_assert (!section
->is_virtual
);
2273 return section
->s
.section
->owner
;
2276 /* Return the bfd section of SECTION.
2277 Returns NULL if the section is not present. */
2280 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2282 if (section
->is_virtual
)
2284 section
= get_containing_section (section
);
2285 gdb_assert (!section
->is_virtual
);
2287 return section
->s
.section
;
2290 /* Return the name of SECTION. */
2293 get_section_name (const struct dwarf2_section_info
*section
)
2295 asection
*sectp
= get_section_bfd_section (section
);
2297 gdb_assert (sectp
!= NULL
);
2298 return bfd_section_name (sectp
);
2301 /* Return the name of the file SECTION is in. */
2304 get_section_file_name (const struct dwarf2_section_info
*section
)
2306 bfd
*abfd
= get_section_bfd_owner (section
);
2308 return bfd_get_filename (abfd
);
2311 /* Return the id of SECTION.
2312 Returns 0 if SECTION doesn't exist. */
2315 get_section_id (const struct dwarf2_section_info
*section
)
2317 asection
*sectp
= get_section_bfd_section (section
);
2324 /* Return the flags of SECTION.
2325 SECTION (or containing section if this is a virtual section) must exist. */
2328 get_section_flags (const struct dwarf2_section_info
*section
)
2330 asection
*sectp
= get_section_bfd_section (section
);
2332 gdb_assert (sectp
!= NULL
);
2333 return bfd_section_flags (sectp
);
2336 /* When loading sections, we look either for uncompressed section or for
2337 compressed section names. */
2340 section_is_p (const char *section_name
,
2341 const struct dwarf2_section_names
*names
)
2343 if (names
->normal
!= NULL
2344 && strcmp (section_name
, names
->normal
) == 0)
2346 if (names
->compressed
!= NULL
2347 && strcmp (section_name
, names
->compressed
) == 0)
2352 /* See declaration. */
2355 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2356 const dwarf2_debug_sections
&names
)
2358 flagword aflag
= bfd_section_flags (sectp
);
2360 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2363 else if (elf_section_data (sectp
)->this_hdr
.sh_size
2364 > bfd_get_file_size (abfd
))
2366 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
2367 warning (_("Discarding section %s which has a section size (%s"
2368 ") larger than the file size [in module %s]"),
2369 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
2370 bfd_get_filename (abfd
));
2372 else if (section_is_p (sectp
->name
, &names
.info
))
2374 this->info
.s
.section
= sectp
;
2375 this->info
.size
= bfd_section_size (sectp
);
2377 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2379 this->abbrev
.s
.section
= sectp
;
2380 this->abbrev
.size
= bfd_section_size (sectp
);
2382 else if (section_is_p (sectp
->name
, &names
.line
))
2384 this->line
.s
.section
= sectp
;
2385 this->line
.size
= bfd_section_size (sectp
);
2387 else if (section_is_p (sectp
->name
, &names
.loc
))
2389 this->loc
.s
.section
= sectp
;
2390 this->loc
.size
= bfd_section_size (sectp
);
2392 else if (section_is_p (sectp
->name
, &names
.loclists
))
2394 this->loclists
.s
.section
= sectp
;
2395 this->loclists
.size
= bfd_section_size (sectp
);
2397 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2399 this->macinfo
.s
.section
= sectp
;
2400 this->macinfo
.size
= bfd_section_size (sectp
);
2402 else if (section_is_p (sectp
->name
, &names
.macro
))
2404 this->macro
.s
.section
= sectp
;
2405 this->macro
.size
= bfd_section_size (sectp
);
2407 else if (section_is_p (sectp
->name
, &names
.str
))
2409 this->str
.s
.section
= sectp
;
2410 this->str
.size
= bfd_section_size (sectp
);
2412 else if (section_is_p (sectp
->name
, &names
.line_str
))
2414 this->line_str
.s
.section
= sectp
;
2415 this->line_str
.size
= bfd_section_size (sectp
);
2417 else if (section_is_p (sectp
->name
, &names
.addr
))
2419 this->addr
.s
.section
= sectp
;
2420 this->addr
.size
= bfd_section_size (sectp
);
2422 else if (section_is_p (sectp
->name
, &names
.frame
))
2424 this->frame
.s
.section
= sectp
;
2425 this->frame
.size
= bfd_section_size (sectp
);
2427 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2429 this->eh_frame
.s
.section
= sectp
;
2430 this->eh_frame
.size
= bfd_section_size (sectp
);
2432 else if (section_is_p (sectp
->name
, &names
.ranges
))
2434 this->ranges
.s
.section
= sectp
;
2435 this->ranges
.size
= bfd_section_size (sectp
);
2437 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2439 this->rnglists
.s
.section
= sectp
;
2440 this->rnglists
.size
= bfd_section_size (sectp
);
2442 else if (section_is_p (sectp
->name
, &names
.types
))
2444 struct dwarf2_section_info type_section
;
2446 memset (&type_section
, 0, sizeof (type_section
));
2447 type_section
.s
.section
= sectp
;
2448 type_section
.size
= bfd_section_size (sectp
);
2450 this->types
.push_back (type_section
);
2452 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2454 this->gdb_index
.s
.section
= sectp
;
2455 this->gdb_index
.size
= bfd_section_size (sectp
);
2457 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2459 this->debug_names
.s
.section
= sectp
;
2460 this->debug_names
.size
= bfd_section_size (sectp
);
2462 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2464 this->debug_aranges
.s
.section
= sectp
;
2465 this->debug_aranges
.size
= bfd_section_size (sectp
);
2468 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2469 && bfd_section_vma (sectp
) == 0)
2470 this->has_section_at_zero
= true;
2473 /* A helper function that decides whether a section is empty,
2477 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2479 if (section
->is_virtual
)
2480 return section
->size
== 0;
2481 return section
->s
.section
== NULL
|| section
->size
== 0;
2484 /* See dwarf2read.h. */
2487 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2491 gdb_byte
*buf
, *retbuf
;
2495 info
->buffer
= NULL
;
2496 info
->readin
= true;
2498 if (dwarf2_section_empty_p (info
))
2501 sectp
= get_section_bfd_section (info
);
2503 /* If this is a virtual section we need to read in the real one first. */
2504 if (info
->is_virtual
)
2506 struct dwarf2_section_info
*containing_section
=
2507 get_containing_section (info
);
2509 gdb_assert (sectp
!= NULL
);
2510 if ((sectp
->flags
& SEC_RELOC
) != 0)
2512 error (_("Dwarf Error: DWP format V2 with relocations is not"
2513 " supported in section %s [in module %s]"),
2514 get_section_name (info
), get_section_file_name (info
));
2516 dwarf2_read_section (objfile
, containing_section
);
2517 /* Other code should have already caught virtual sections that don't
2519 gdb_assert (info
->virtual_offset
+ info
->size
2520 <= containing_section
->size
);
2521 /* If the real section is empty or there was a problem reading the
2522 section we shouldn't get here. */
2523 gdb_assert (containing_section
->buffer
!= NULL
);
2524 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2528 /* If the section has relocations, we must read it ourselves.
2529 Otherwise we attach it to the BFD. */
2530 if ((sectp
->flags
& SEC_RELOC
) == 0)
2532 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2536 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2539 /* When debugging .o files, we may need to apply relocations; see
2540 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2541 We never compress sections in .o files, so we only need to
2542 try this when the section is not compressed. */
2543 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2546 info
->buffer
= retbuf
;
2550 abfd
= get_section_bfd_owner (info
);
2551 gdb_assert (abfd
!= NULL
);
2553 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2554 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2556 error (_("Dwarf Error: Can't read DWARF data"
2557 " in section %s [in module %s]"),
2558 bfd_section_name (sectp
), bfd_get_filename (abfd
));
2562 /* A helper function that returns the size of a section in a safe way.
2563 If you are positive that the section has been read before using the
2564 size, then it is safe to refer to the dwarf2_section_info object's
2565 "size" field directly. In other cases, you must call this
2566 function, because for compressed sections the size field is not set
2567 correctly until the section has been read. */
2569 static bfd_size_type
2570 dwarf2_section_size (struct objfile
*objfile
,
2571 struct dwarf2_section_info
*info
)
2574 dwarf2_read_section (objfile
, info
);
2578 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2582 dwarf2_get_section_info (struct objfile
*objfile
,
2583 enum dwarf2_section_enum sect
,
2584 asection
**sectp
, const gdb_byte
**bufp
,
2585 bfd_size_type
*sizep
)
2587 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2588 struct dwarf2_section_info
*info
;
2590 /* We may see an objfile without any DWARF, in which case we just
2601 case DWARF2_DEBUG_FRAME
:
2602 info
= &data
->frame
;
2604 case DWARF2_EH_FRAME
:
2605 info
= &data
->eh_frame
;
2608 gdb_assert_not_reached ("unexpected section");
2611 dwarf2_read_section (objfile
, info
);
2613 *sectp
= get_section_bfd_section (info
);
2614 *bufp
= info
->buffer
;
2615 *sizep
= info
->size
;
2618 /* A helper function to find the sections for a .dwz file. */
2621 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2623 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2625 /* Note that we only support the standard ELF names, because .dwz
2626 is ELF-only (at the time of writing). */
2627 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2629 dwz_file
->abbrev
.s
.section
= sectp
;
2630 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2632 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2634 dwz_file
->info
.s
.section
= sectp
;
2635 dwz_file
->info
.size
= bfd_section_size (sectp
);
2637 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2639 dwz_file
->str
.s
.section
= sectp
;
2640 dwz_file
->str
.size
= bfd_section_size (sectp
);
2642 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2644 dwz_file
->line
.s
.section
= sectp
;
2645 dwz_file
->line
.size
= bfd_section_size (sectp
);
2647 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2649 dwz_file
->macro
.s
.section
= sectp
;
2650 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2652 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2654 dwz_file
->gdb_index
.s
.section
= sectp
;
2655 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2657 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2659 dwz_file
->debug_names
.s
.section
= sectp
;
2660 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2664 /* See dwarf2read.h. */
2667 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2669 const char *filename
;
2670 bfd_size_type buildid_len_arg
;
2674 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2675 return dwarf2_per_objfile
->dwz_file
.get ();
2677 bfd_set_error (bfd_error_no_error
);
2678 gdb::unique_xmalloc_ptr
<char> data
2679 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2680 &buildid_len_arg
, &buildid
));
2683 if (bfd_get_error () == bfd_error_no_error
)
2685 error (_("could not read '.gnu_debugaltlink' section: %s"),
2686 bfd_errmsg (bfd_get_error ()));
2689 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2691 buildid_len
= (size_t) buildid_len_arg
;
2693 filename
= data
.get ();
2695 std::string abs_storage
;
2696 if (!IS_ABSOLUTE_PATH (filename
))
2698 gdb::unique_xmalloc_ptr
<char> abs
2699 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2701 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2702 filename
= abs_storage
.c_str ();
2705 /* First try the file name given in the section. If that doesn't
2706 work, try to use the build-id instead. */
2707 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2708 if (dwz_bfd
!= NULL
)
2710 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2711 dwz_bfd
.reset (nullptr);
2714 if (dwz_bfd
== NULL
)
2715 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2717 if (dwz_bfd
== NULL
)
2718 error (_("could not find '.gnu_debugaltlink' file for %s"),
2719 objfile_name (dwarf2_per_objfile
->objfile
));
2721 std::unique_ptr
<struct dwz_file
> result
2722 (new struct dwz_file (std::move (dwz_bfd
)));
2724 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2727 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2728 result
->dwz_bfd
.get ());
2729 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2730 return dwarf2_per_objfile
->dwz_file
.get ();
2733 /* DWARF quick_symbols_functions support. */
2735 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2736 unique line tables, so we maintain a separate table of all .debug_line
2737 derived entries to support the sharing.
2738 All the quick functions need is the list of file names. We discard the
2739 line_header when we're done and don't need to record it here. */
2740 struct quick_file_names
2742 /* The data used to construct the hash key. */
2743 struct stmt_list_hash hash
;
2745 /* The number of entries in file_names, real_names. */
2746 unsigned int num_file_names
;
2748 /* The file names from the line table, after being run through
2750 const char **file_names
;
2752 /* The file names from the line table after being run through
2753 gdb_realpath. These are computed lazily. */
2754 const char **real_names
;
2757 /* When using the index (and thus not using psymtabs), each CU has an
2758 object of this type. This is used to hold information needed by
2759 the various "quick" methods. */
2760 struct dwarf2_per_cu_quick_data
2762 /* The file table. This can be NULL if there was no file table
2763 or it's currently not read in.
2764 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2765 struct quick_file_names
*file_names
;
2767 /* The corresponding symbol table. This is NULL if symbols for this
2768 CU have not yet been read. */
2769 struct compunit_symtab
*compunit_symtab
;
2771 /* A temporary mark bit used when iterating over all CUs in
2772 expand_symtabs_matching. */
2773 unsigned int mark
: 1;
2775 /* True if we've tried to read the file table and found there isn't one.
2776 There will be no point in trying to read it again next time. */
2777 unsigned int no_file_data
: 1;
2780 /* Utility hash function for a stmt_list_hash. */
2783 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2787 if (stmt_list_hash
->dwo_unit
!= NULL
)
2788 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2789 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2793 /* Utility equality function for a stmt_list_hash. */
2796 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2797 const struct stmt_list_hash
*rhs
)
2799 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2801 if (lhs
->dwo_unit
!= NULL
2802 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2805 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2808 /* Hash function for a quick_file_names. */
2811 hash_file_name_entry (const void *e
)
2813 const struct quick_file_names
*file_data
2814 = (const struct quick_file_names
*) e
;
2816 return hash_stmt_list_entry (&file_data
->hash
);
2819 /* Equality function for a quick_file_names. */
2822 eq_file_name_entry (const void *a
, const void *b
)
2824 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2825 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2827 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2830 /* Delete function for a quick_file_names. */
2833 delete_file_name_entry (void *e
)
2835 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2838 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2840 xfree ((void*) file_data
->file_names
[i
]);
2841 if (file_data
->real_names
)
2842 xfree ((void*) file_data
->real_names
[i
]);
2845 /* The space for the struct itself lives on objfile_obstack,
2846 so we don't free it here. */
2849 /* Create a quick_file_names hash table. */
2852 create_quick_file_names_table (unsigned int nr_initial_entries
)
2854 return htab_create_alloc (nr_initial_entries
,
2855 hash_file_name_entry
, eq_file_name_entry
,
2856 delete_file_name_entry
, xcalloc
, xfree
);
2859 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2860 have to be created afterwards. You should call age_cached_comp_units after
2861 processing PER_CU->CU. dw2_setup must have been already called. */
2864 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2866 if (per_cu
->is_debug_types
)
2867 load_full_type_unit (per_cu
);
2869 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2871 if (per_cu
->cu
== NULL
)
2872 return; /* Dummy CU. */
2874 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2877 /* Read in the symbols for PER_CU. */
2880 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2882 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2884 /* Skip type_unit_groups, reading the type units they contain
2885 is handled elsewhere. */
2886 if (IS_TYPE_UNIT_GROUP (per_cu
))
2889 /* The destructor of dwarf2_queue_guard frees any entries left on
2890 the queue. After this point we're guaranteed to leave this function
2891 with the dwarf queue empty. */
2892 dwarf2_queue_guard q_guard
;
2894 if (dwarf2_per_objfile
->using_index
2895 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2896 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2898 queue_comp_unit (per_cu
, language_minimal
);
2899 load_cu (per_cu
, skip_partial
);
2901 /* If we just loaded a CU from a DWO, and we're working with an index
2902 that may badly handle TUs, load all the TUs in that DWO as well.
2903 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2904 if (!per_cu
->is_debug_types
2905 && per_cu
->cu
!= NULL
2906 && per_cu
->cu
->dwo_unit
!= NULL
2907 && dwarf2_per_objfile
->index_table
!= NULL
2908 && dwarf2_per_objfile
->index_table
->version
<= 7
2909 /* DWP files aren't supported yet. */
2910 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2911 queue_and_load_all_dwo_tus (per_cu
);
2914 process_queue (dwarf2_per_objfile
);
2916 /* Age the cache, releasing compilation units that have not
2917 been used recently. */
2918 age_cached_comp_units (dwarf2_per_objfile
);
2921 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2922 the objfile from which this CU came. Returns the resulting symbol
2925 static struct compunit_symtab
*
2926 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2928 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2930 gdb_assert (dwarf2_per_objfile
->using_index
);
2931 if (!per_cu
->v
.quick
->compunit_symtab
)
2933 free_cached_comp_units
freer (dwarf2_per_objfile
);
2934 scoped_restore decrementer
= increment_reading_symtab ();
2935 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2936 process_cu_includes (dwarf2_per_objfile
);
2939 return per_cu
->v
.quick
->compunit_symtab
;
2942 /* See declaration. */
2944 dwarf2_per_cu_data
*
2945 dwarf2_per_objfile::get_cutu (int index
)
2947 if (index
>= this->all_comp_units
.size ())
2949 index
-= this->all_comp_units
.size ();
2950 gdb_assert (index
< this->all_type_units
.size ());
2951 return &this->all_type_units
[index
]->per_cu
;
2954 return this->all_comp_units
[index
];
2957 /* See declaration. */
2959 dwarf2_per_cu_data
*
2960 dwarf2_per_objfile::get_cu (int index
)
2962 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2964 return this->all_comp_units
[index
];
2967 /* See declaration. */
2970 dwarf2_per_objfile::get_tu (int index
)
2972 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2974 return this->all_type_units
[index
];
2977 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2978 objfile_obstack, and constructed with the specified field
2981 static dwarf2_per_cu_data
*
2982 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2983 struct dwarf2_section_info
*section
,
2985 sect_offset sect_off
, ULONGEST length
)
2987 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2988 dwarf2_per_cu_data
*the_cu
2989 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2990 struct dwarf2_per_cu_data
);
2991 the_cu
->sect_off
= sect_off
;
2992 the_cu
->length
= length
;
2993 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2994 the_cu
->section
= section
;
2995 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2996 struct dwarf2_per_cu_quick_data
);
2997 the_cu
->is_dwz
= is_dwz
;
3001 /* A helper for create_cus_from_index that handles a given list of
3005 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3006 const gdb_byte
*cu_list
, offset_type n_elements
,
3007 struct dwarf2_section_info
*section
,
3010 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
3012 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3014 sect_offset sect_off
3015 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3016 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3019 dwarf2_per_cu_data
*per_cu
3020 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
3022 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3026 /* Read the CU list from the mapped index, and use it to create all
3027 the CU objects for this objfile. */
3030 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3031 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3032 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3034 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3035 dwarf2_per_objfile
->all_comp_units
.reserve
3036 ((cu_list_elements
+ dwz_elements
) / 2);
3038 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3039 &dwarf2_per_objfile
->info
, 0);
3041 if (dwz_elements
== 0)
3044 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3045 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3049 /* Create the signatured type hash table from the index. */
3052 create_signatured_type_table_from_index
3053 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3054 struct dwarf2_section_info
*section
,
3055 const gdb_byte
*bytes
,
3056 offset_type elements
)
3058 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3060 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3061 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3063 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3065 for (offset_type i
= 0; i
< elements
; i
+= 3)
3067 struct signatured_type
*sig_type
;
3070 cu_offset type_offset_in_tu
;
3072 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3073 sect_offset sect_off
3074 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3076 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3078 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3081 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3082 struct signatured_type
);
3083 sig_type
->signature
= signature
;
3084 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3085 sig_type
->per_cu
.is_debug_types
= 1;
3086 sig_type
->per_cu
.section
= section
;
3087 sig_type
->per_cu
.sect_off
= sect_off
;
3088 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3089 sig_type
->per_cu
.v
.quick
3090 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3091 struct dwarf2_per_cu_quick_data
);
3093 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3096 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3099 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3102 /* Create the signatured type hash table from .debug_names. */
3105 create_signatured_type_table_from_debug_names
3106 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3107 const mapped_debug_names
&map
,
3108 struct dwarf2_section_info
*section
,
3109 struct dwarf2_section_info
*abbrev_section
)
3111 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3113 dwarf2_read_section (objfile
, section
);
3114 dwarf2_read_section (objfile
, abbrev_section
);
3116 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3117 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3119 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3121 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3123 struct signatured_type
*sig_type
;
3126 sect_offset sect_off
3127 = (sect_offset
) (extract_unsigned_integer
3128 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3130 map
.dwarf5_byte_order
));
3132 comp_unit_head cu_header
;
3133 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3135 section
->buffer
+ to_underlying (sect_off
),
3138 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3139 struct signatured_type
);
3140 sig_type
->signature
= cu_header
.signature
;
3141 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3142 sig_type
->per_cu
.is_debug_types
= 1;
3143 sig_type
->per_cu
.section
= section
;
3144 sig_type
->per_cu
.sect_off
= sect_off
;
3145 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3146 sig_type
->per_cu
.v
.quick
3147 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3148 struct dwarf2_per_cu_quick_data
);
3150 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3153 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3156 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3159 /* Read the address map data from the mapped index, and use it to
3160 populate the objfile's psymtabs_addrmap. */
3163 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3164 struct mapped_index
*index
)
3166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3167 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3168 const gdb_byte
*iter
, *end
;
3169 struct addrmap
*mutable_map
;
3172 auto_obstack temp_obstack
;
3174 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3176 iter
= index
->address_table
.data ();
3177 end
= iter
+ index
->address_table
.size ();
3179 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3183 ULONGEST hi
, lo
, cu_index
;
3184 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3186 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3188 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3193 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3194 hex_string (lo
), hex_string (hi
));
3198 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3200 complaint (_(".gdb_index address table has invalid CU number %u"),
3201 (unsigned) cu_index
);
3205 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
3206 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
3207 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3208 dwarf2_per_objfile
->get_cu (cu_index
));
3211 objfile
->partial_symtabs
->psymtabs_addrmap
3212 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3215 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3216 populate the objfile's psymtabs_addrmap. */
3219 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3220 struct dwarf2_section_info
*section
)
3222 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3223 bfd
*abfd
= objfile
->obfd
;
3224 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3225 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3226 SECT_OFF_TEXT (objfile
));
3228 auto_obstack temp_obstack
;
3229 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3231 std::unordered_map
<sect_offset
,
3232 dwarf2_per_cu_data
*,
3233 gdb::hash_enum
<sect_offset
>>
3234 debug_info_offset_to_per_cu
;
3235 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3237 const auto insertpair
3238 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3239 if (!insertpair
.second
)
3241 warning (_("Section .debug_aranges in %s has duplicate "
3242 "debug_info_offset %s, ignoring .debug_aranges."),
3243 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3248 dwarf2_read_section (objfile
, section
);
3250 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3252 const gdb_byte
*addr
= section
->buffer
;
3254 while (addr
< section
->buffer
+ section
->size
)
3256 const gdb_byte
*const entry_addr
= addr
;
3257 unsigned int bytes_read
;
3259 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3263 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3264 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3265 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3266 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3268 warning (_("Section .debug_aranges in %s entry at offset %s "
3269 "length %s exceeds section length %s, "
3270 "ignoring .debug_aranges."),
3271 objfile_name (objfile
),
3272 plongest (entry_addr
- section
->buffer
),
3273 plongest (bytes_read
+ entry_length
),
3274 pulongest (section
->size
));
3278 /* The version number. */
3279 const uint16_t version
= read_2_bytes (abfd
, addr
);
3283 warning (_("Section .debug_aranges in %s entry at offset %s "
3284 "has unsupported version %d, ignoring .debug_aranges."),
3285 objfile_name (objfile
),
3286 plongest (entry_addr
- section
->buffer
), version
);
3290 const uint64_t debug_info_offset
3291 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3292 addr
+= offset_size
;
3293 const auto per_cu_it
3294 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3295 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3297 warning (_("Section .debug_aranges in %s entry at offset %s "
3298 "debug_info_offset %s does not exists, "
3299 "ignoring .debug_aranges."),
3300 objfile_name (objfile
),
3301 plongest (entry_addr
- section
->buffer
),
3302 pulongest (debug_info_offset
));
3305 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3307 const uint8_t address_size
= *addr
++;
3308 if (address_size
< 1 || address_size
> 8)
3310 warning (_("Section .debug_aranges in %s entry at offset %s "
3311 "address_size %u is invalid, ignoring .debug_aranges."),
3312 objfile_name (objfile
),
3313 plongest (entry_addr
- section
->buffer
), address_size
);
3317 const uint8_t segment_selector_size
= *addr
++;
3318 if (segment_selector_size
!= 0)
3320 warning (_("Section .debug_aranges in %s entry at offset %s "
3321 "segment_selector_size %u is not supported, "
3322 "ignoring .debug_aranges."),
3323 objfile_name (objfile
),
3324 plongest (entry_addr
- section
->buffer
),
3325 segment_selector_size
);
3329 /* Must pad to an alignment boundary that is twice the address
3330 size. It is undocumented by the DWARF standard but GCC does
3332 for (size_t padding
= ((-(addr
- section
->buffer
))
3333 & (2 * address_size
- 1));
3334 padding
> 0; padding
--)
3337 warning (_("Section .debug_aranges in %s entry at offset %s "
3338 "padding is not zero, ignoring .debug_aranges."),
3339 objfile_name (objfile
),
3340 plongest (entry_addr
- section
->buffer
));
3346 if (addr
+ 2 * address_size
> entry_end
)
3348 warning (_("Section .debug_aranges in %s entry at offset %s "
3349 "address list is not properly terminated, "
3350 "ignoring .debug_aranges."),
3351 objfile_name (objfile
),
3352 plongest (entry_addr
- section
->buffer
));
3355 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3357 addr
+= address_size
;
3358 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3360 addr
+= address_size
;
3361 if (start
== 0 && length
== 0)
3363 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3365 /* Symbol was eliminated due to a COMDAT group. */
3368 ULONGEST end
= start
+ length
;
3369 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3371 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3373 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3377 objfile
->partial_symtabs
->psymtabs_addrmap
3378 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3381 /* Find a slot in the mapped index INDEX for the object named NAME.
3382 If NAME is found, set *VEC_OUT to point to the CU vector in the
3383 constant pool and return true. If NAME cannot be found, return
3387 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3388 offset_type
**vec_out
)
3391 offset_type slot
, step
;
3392 int (*cmp
) (const char *, const char *);
3394 gdb::unique_xmalloc_ptr
<char> without_params
;
3395 if (current_language
->la_language
== language_cplus
3396 || current_language
->la_language
== language_fortran
3397 || current_language
->la_language
== language_d
)
3399 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3402 if (strchr (name
, '(') != NULL
)
3404 without_params
= cp_remove_params (name
);
3406 if (without_params
!= NULL
)
3407 name
= without_params
.get ();
3411 /* Index version 4 did not support case insensitive searches. But the
3412 indices for case insensitive languages are built in lowercase, therefore
3413 simulate our NAME being searched is also lowercased. */
3414 hash
= mapped_index_string_hash ((index
->version
== 4
3415 && case_sensitivity
== case_sensitive_off
3416 ? 5 : index
->version
),
3419 slot
= hash
& (index
->symbol_table
.size () - 1);
3420 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3421 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3427 const auto &bucket
= index
->symbol_table
[slot
];
3428 if (bucket
.name
== 0 && bucket
.vec
== 0)
3431 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3432 if (!cmp (name
, str
))
3434 *vec_out
= (offset_type
*) (index
->constant_pool
3435 + MAYBE_SWAP (bucket
.vec
));
3439 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3443 /* A helper function that reads the .gdb_index from BUFFER and fills
3444 in MAP. FILENAME is the name of the file containing the data;
3445 it is used for error reporting. DEPRECATED_OK is true if it is
3446 ok to use deprecated sections.
3448 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3449 out parameters that are filled in with information about the CU and
3450 TU lists in the section.
3452 Returns true if all went well, false otherwise. */
3455 read_gdb_index_from_buffer (struct objfile
*objfile
,
3456 const char *filename
,
3458 gdb::array_view
<const gdb_byte
> buffer
,
3459 struct mapped_index
*map
,
3460 const gdb_byte
**cu_list
,
3461 offset_type
*cu_list_elements
,
3462 const gdb_byte
**types_list
,
3463 offset_type
*types_list_elements
)
3465 const gdb_byte
*addr
= &buffer
[0];
3467 /* Version check. */
3468 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3469 /* Versions earlier than 3 emitted every copy of a psymbol. This
3470 causes the index to behave very poorly for certain requests. Version 3
3471 contained incomplete addrmap. So, it seems better to just ignore such
3475 static int warning_printed
= 0;
3476 if (!warning_printed
)
3478 warning (_("Skipping obsolete .gdb_index section in %s."),
3480 warning_printed
= 1;
3484 /* Index version 4 uses a different hash function than index version
3487 Versions earlier than 6 did not emit psymbols for inlined
3488 functions. Using these files will cause GDB not to be able to
3489 set breakpoints on inlined functions by name, so we ignore these
3490 indices unless the user has done
3491 "set use-deprecated-index-sections on". */
3492 if (version
< 6 && !deprecated_ok
)
3494 static int warning_printed
= 0;
3495 if (!warning_printed
)
3498 Skipping deprecated .gdb_index section in %s.\n\
3499 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3500 to use the section anyway."),
3502 warning_printed
= 1;
3506 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3507 of the TU (for symbols coming from TUs),
3508 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3509 Plus gold-generated indices can have duplicate entries for global symbols,
3510 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3511 These are just performance bugs, and we can't distinguish gdb-generated
3512 indices from gold-generated ones, so issue no warning here. */
3514 /* Indexes with higher version than the one supported by GDB may be no
3515 longer backward compatible. */
3519 map
->version
= version
;
3521 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3524 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3525 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3529 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3530 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3531 - MAYBE_SWAP (metadata
[i
]))
3535 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3536 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3538 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3541 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3542 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3544 = gdb::array_view
<mapped_index::symbol_table_slot
>
3545 ((mapped_index::symbol_table_slot
*) symbol_table
,
3546 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3549 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3554 /* Callback types for dwarf2_read_gdb_index. */
3556 typedef gdb::function_view
3557 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3558 get_gdb_index_contents_ftype
;
3559 typedef gdb::function_view
3560 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3561 get_gdb_index_contents_dwz_ftype
;
3563 /* Read .gdb_index. If everything went ok, initialize the "quick"
3564 elements of all the CUs and return 1. Otherwise, return 0. */
3567 dwarf2_read_gdb_index
3568 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3569 get_gdb_index_contents_ftype get_gdb_index_contents
,
3570 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3572 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3573 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3574 struct dwz_file
*dwz
;
3575 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3577 gdb::array_view
<const gdb_byte
> main_index_contents
3578 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3580 if (main_index_contents
.empty ())
3583 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3584 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3585 use_deprecated_index_sections
,
3586 main_index_contents
, map
.get (), &cu_list
,
3587 &cu_list_elements
, &types_list
,
3588 &types_list_elements
))
3591 /* Don't use the index if it's empty. */
3592 if (map
->symbol_table
.empty ())
3595 /* If there is a .dwz file, read it so we can get its CU list as
3597 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3600 struct mapped_index dwz_map
;
3601 const gdb_byte
*dwz_types_ignore
;
3602 offset_type dwz_types_elements_ignore
;
3604 gdb::array_view
<const gdb_byte
> dwz_index_content
3605 = get_gdb_index_contents_dwz (objfile
, dwz
);
3607 if (dwz_index_content
.empty ())
3610 if (!read_gdb_index_from_buffer (objfile
,
3611 bfd_get_filename (dwz
->dwz_bfd
.get ()),
3612 1, dwz_index_content
, &dwz_map
,
3613 &dwz_list
, &dwz_list_elements
,
3615 &dwz_types_elements_ignore
))
3617 warning (_("could not read '.gdb_index' section from %s; skipping"),
3618 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3623 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3624 dwz_list
, dwz_list_elements
);
3626 if (types_list_elements
)
3628 /* We can only handle a single .debug_types when we have an
3630 if (dwarf2_per_objfile
->types
.size () != 1)
3633 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3635 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3636 types_list
, types_list_elements
);
3639 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3641 dwarf2_per_objfile
->index_table
= std::move (map
);
3642 dwarf2_per_objfile
->using_index
= 1;
3643 dwarf2_per_objfile
->quick_file_names_table
=
3644 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3649 /* die_reader_func for dw2_get_file_names. */
3652 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3653 const gdb_byte
*info_ptr
,
3654 struct die_info
*comp_unit_die
,
3658 struct dwarf2_cu
*cu
= reader
->cu
;
3659 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3660 struct dwarf2_per_objfile
*dwarf2_per_objfile
3661 = cu
->per_cu
->dwarf2_per_objfile
;
3662 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3663 struct dwarf2_per_cu_data
*lh_cu
;
3664 struct attribute
*attr
;
3666 struct quick_file_names
*qfn
;
3668 gdb_assert (! this_cu
->is_debug_types
);
3670 /* Our callers never want to match partial units -- instead they
3671 will match the enclosing full CU. */
3672 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3674 this_cu
->v
.quick
->no_file_data
= 1;
3682 sect_offset line_offset
{};
3684 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3687 struct quick_file_names find_entry
;
3689 line_offset
= (sect_offset
) DW_UNSND (attr
);
3691 /* We may have already read in this line header (TU line header sharing).
3692 If we have we're done. */
3693 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3694 find_entry
.hash
.line_sect_off
= line_offset
;
3695 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3696 &find_entry
, INSERT
);
3699 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3703 lh
= dwarf_decode_line_header (line_offset
, cu
);
3707 lh_cu
->v
.quick
->no_file_data
= 1;
3711 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3712 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3713 qfn
->hash
.line_sect_off
= line_offset
;
3714 gdb_assert (slot
!= NULL
);
3717 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3720 if (strcmp (fnd
.name
, "<unknown>") != 0)
3723 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3725 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3727 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3728 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3729 qfn
->file_names
[i
+ offset
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3730 qfn
->real_names
= NULL
;
3732 lh_cu
->v
.quick
->file_names
= qfn
;
3735 /* A helper for the "quick" functions which attempts to read the line
3736 table for THIS_CU. */
3738 static struct quick_file_names
*
3739 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3741 /* This should never be called for TUs. */
3742 gdb_assert (! this_cu
->is_debug_types
);
3743 /* Nor type unit groups. */
3744 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3746 if (this_cu
->v
.quick
->file_names
!= NULL
)
3747 return this_cu
->v
.quick
->file_names
;
3748 /* If we know there is no line data, no point in looking again. */
3749 if (this_cu
->v
.quick
->no_file_data
)
3752 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3754 if (this_cu
->v
.quick
->no_file_data
)
3756 return this_cu
->v
.quick
->file_names
;
3759 /* A helper for the "quick" functions which computes and caches the
3760 real path for a given file name from the line table. */
3763 dw2_get_real_path (struct objfile
*objfile
,
3764 struct quick_file_names
*qfn
, int index
)
3766 if (qfn
->real_names
== NULL
)
3767 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3768 qfn
->num_file_names
, const char *);
3770 if (qfn
->real_names
[index
] == NULL
)
3771 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3773 return qfn
->real_names
[index
];
3776 static struct symtab
*
3777 dw2_find_last_source_symtab (struct objfile
*objfile
)
3779 struct dwarf2_per_objfile
*dwarf2_per_objfile
3780 = get_dwarf2_per_objfile (objfile
);
3781 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3782 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3787 return compunit_primary_filetab (cust
);
3790 /* Traversal function for dw2_forget_cached_source_info. */
3793 dw2_free_cached_file_names (void **slot
, void *info
)
3795 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3797 if (file_data
->real_names
)
3801 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3803 xfree ((void*) file_data
->real_names
[i
]);
3804 file_data
->real_names
[i
] = NULL
;
3812 dw2_forget_cached_source_info (struct objfile
*objfile
)
3814 struct dwarf2_per_objfile
*dwarf2_per_objfile
3815 = get_dwarf2_per_objfile (objfile
);
3817 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3818 dw2_free_cached_file_names
, NULL
);
3821 /* Helper function for dw2_map_symtabs_matching_filename that expands
3822 the symtabs and calls the iterator. */
3825 dw2_map_expand_apply (struct objfile
*objfile
,
3826 struct dwarf2_per_cu_data
*per_cu
,
3827 const char *name
, const char *real_path
,
3828 gdb::function_view
<bool (symtab
*)> callback
)
3830 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3832 /* Don't visit already-expanded CUs. */
3833 if (per_cu
->v
.quick
->compunit_symtab
)
3836 /* This may expand more than one symtab, and we want to iterate over
3838 dw2_instantiate_symtab (per_cu
, false);
3840 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3841 last_made
, callback
);
3844 /* Implementation of the map_symtabs_matching_filename method. */
3847 dw2_map_symtabs_matching_filename
3848 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3849 gdb::function_view
<bool (symtab
*)> callback
)
3851 const char *name_basename
= lbasename (name
);
3852 struct dwarf2_per_objfile
*dwarf2_per_objfile
3853 = get_dwarf2_per_objfile (objfile
);
3855 /* The rule is CUs specify all the files, including those used by
3856 any TU, so there's no need to scan TUs here. */
3858 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3860 /* We only need to look at symtabs not already expanded. */
3861 if (per_cu
->v
.quick
->compunit_symtab
)
3864 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3865 if (file_data
== NULL
)
3868 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3870 const char *this_name
= file_data
->file_names
[j
];
3871 const char *this_real_name
;
3873 if (compare_filenames_for_search (this_name
, name
))
3875 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3881 /* Before we invoke realpath, which can get expensive when many
3882 files are involved, do a quick comparison of the basenames. */
3883 if (! basenames_may_differ
3884 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3887 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3888 if (compare_filenames_for_search (this_real_name
, name
))
3890 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3896 if (real_path
!= NULL
)
3898 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3899 gdb_assert (IS_ABSOLUTE_PATH (name
));
3900 if (this_real_name
!= NULL
3901 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3903 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3915 /* Struct used to manage iterating over all CUs looking for a symbol. */
3917 struct dw2_symtab_iterator
3919 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3920 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3921 /* If set, only look for symbols that match that block. Valid values are
3922 GLOBAL_BLOCK and STATIC_BLOCK. */
3923 gdb::optional
<block_enum
> block_index
;
3924 /* The kind of symbol we're looking for. */
3926 /* The list of CUs from the index entry of the symbol,
3927 or NULL if not found. */
3929 /* The next element in VEC to look at. */
3931 /* The number of elements in VEC, or zero if there is no match. */
3933 /* Have we seen a global version of the symbol?
3934 If so we can ignore all further global instances.
3935 This is to work around gold/15646, inefficient gold-generated
3940 /* Initialize the index symtab iterator ITER. */
3943 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3944 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3945 gdb::optional
<block_enum
> block_index
,
3949 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3950 iter
->block_index
= block_index
;
3951 iter
->domain
= domain
;
3953 iter
->global_seen
= 0;
3955 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3957 /* index is NULL if OBJF_READNOW. */
3958 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3959 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3967 /* Return the next matching CU or NULL if there are no more. */
3969 static struct dwarf2_per_cu_data
*
3970 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3972 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3974 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3976 offset_type cu_index_and_attrs
=
3977 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3978 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3979 gdb_index_symbol_kind symbol_kind
=
3980 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3981 /* Only check the symbol attributes if they're present.
3982 Indices prior to version 7 don't record them,
3983 and indices >= 7 may elide them for certain symbols
3984 (gold does this). */
3986 (dwarf2_per_objfile
->index_table
->version
>= 7
3987 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3989 /* Don't crash on bad data. */
3990 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3991 + dwarf2_per_objfile
->all_type_units
.size ()))
3993 complaint (_(".gdb_index entry has bad CU index"
3995 objfile_name (dwarf2_per_objfile
->objfile
));
3999 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4001 /* Skip if already read in. */
4002 if (per_cu
->v
.quick
->compunit_symtab
)
4005 /* Check static vs global. */
4008 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4010 if (iter
->block_index
.has_value ())
4012 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
4014 if (is_static
!= want_static
)
4018 /* Work around gold/15646. */
4019 if (!is_static
&& iter
->global_seen
)
4022 iter
->global_seen
= 1;
4025 /* Only check the symbol's kind if it has one. */
4028 switch (iter
->domain
)
4031 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4032 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4033 /* Some types are also in VAR_DOMAIN. */
4034 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4038 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4042 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4057 static struct compunit_symtab
*
4058 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
4059 const char *name
, domain_enum domain
)
4061 struct compunit_symtab
*stab_best
= NULL
;
4062 struct dwarf2_per_objfile
*dwarf2_per_objfile
4063 = get_dwarf2_per_objfile (objfile
);
4065 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4067 struct dw2_symtab_iterator iter
;
4068 struct dwarf2_per_cu_data
*per_cu
;
4070 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
4072 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4074 struct symbol
*sym
, *with_opaque
= NULL
;
4075 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4076 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4077 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4079 sym
= block_find_symbol (block
, name
, domain
,
4080 block_find_non_opaque_type_preferred
,
4083 /* Some caution must be observed with overloaded functions
4084 and methods, since the index will not contain any overload
4085 information (but NAME might contain it). */
4088 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4090 if (with_opaque
!= NULL
4091 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4094 /* Keep looking through other CUs. */
4101 dw2_print_stats (struct objfile
*objfile
)
4103 struct dwarf2_per_objfile
*dwarf2_per_objfile
4104 = get_dwarf2_per_objfile (objfile
);
4105 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4106 + dwarf2_per_objfile
->all_type_units
.size ());
4109 for (int i
= 0; i
< total
; ++i
)
4111 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4113 if (!per_cu
->v
.quick
->compunit_symtab
)
4116 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4117 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4120 /* This dumps minimal information about the index.
4121 It is called via "mt print objfiles".
4122 One use is to verify .gdb_index has been loaded by the
4123 gdb.dwarf2/gdb-index.exp testcase. */
4126 dw2_dump (struct objfile
*objfile
)
4128 struct dwarf2_per_objfile
*dwarf2_per_objfile
4129 = get_dwarf2_per_objfile (objfile
);
4131 gdb_assert (dwarf2_per_objfile
->using_index
);
4132 printf_filtered (".gdb_index:");
4133 if (dwarf2_per_objfile
->index_table
!= NULL
)
4135 printf_filtered (" version %d\n",
4136 dwarf2_per_objfile
->index_table
->version
);
4139 printf_filtered (" faked for \"readnow\"\n");
4140 printf_filtered ("\n");
4144 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4145 const char *func_name
)
4147 struct dwarf2_per_objfile
*dwarf2_per_objfile
4148 = get_dwarf2_per_objfile (objfile
);
4150 struct dw2_symtab_iterator iter
;
4151 struct dwarf2_per_cu_data
*per_cu
;
4153 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
4155 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4156 dw2_instantiate_symtab (per_cu
, false);
4161 dw2_expand_all_symtabs (struct objfile
*objfile
)
4163 struct dwarf2_per_objfile
*dwarf2_per_objfile
4164 = get_dwarf2_per_objfile (objfile
);
4165 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4166 + dwarf2_per_objfile
->all_type_units
.size ());
4168 for (int i
= 0; i
< total_units
; ++i
)
4170 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4172 /* We don't want to directly expand a partial CU, because if we
4173 read it with the wrong language, then assertion failures can
4174 be triggered later on. See PR symtab/23010. So, tell
4175 dw2_instantiate_symtab to skip partial CUs -- any important
4176 partial CU will be read via DW_TAG_imported_unit anyway. */
4177 dw2_instantiate_symtab (per_cu
, true);
4182 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4183 const char *fullname
)
4185 struct dwarf2_per_objfile
*dwarf2_per_objfile
4186 = get_dwarf2_per_objfile (objfile
);
4188 /* We don't need to consider type units here.
4189 This is only called for examining code, e.g. expand_line_sal.
4190 There can be an order of magnitude (or more) more type units
4191 than comp units, and we avoid them if we can. */
4193 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4195 /* We only need to look at symtabs not already expanded. */
4196 if (per_cu
->v
.quick
->compunit_symtab
)
4199 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4200 if (file_data
== NULL
)
4203 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4205 const char *this_fullname
= file_data
->file_names
[j
];
4207 if (filename_cmp (this_fullname
, fullname
) == 0)
4209 dw2_instantiate_symtab (per_cu
, false);
4217 dw2_map_matching_symbols
4218 (struct objfile
*objfile
,
4219 const lookup_name_info
&name
, domain_enum domain
,
4221 gdb::function_view
<symbol_found_callback_ftype
> callback
,
4222 symbol_compare_ftype
*ordered_compare
)
4224 /* Currently unimplemented; used for Ada. The function can be called if the
4225 current language is Ada for a non-Ada objfile using GNU index. As Ada
4226 does not look for non-Ada symbols this function should just return. */
4229 /* Starting from a search name, return the string that finds the upper
4230 bound of all strings that start with SEARCH_NAME in a sorted name
4231 list. Returns the empty string to indicate that the upper bound is
4232 the end of the list. */
4235 make_sort_after_prefix_name (const char *search_name
)
4237 /* When looking to complete "func", we find the upper bound of all
4238 symbols that start with "func" by looking for where we'd insert
4239 the closest string that would follow "func" in lexicographical
4240 order. Usually, that's "func"-with-last-character-incremented,
4241 i.e. "fund". Mind non-ASCII characters, though. Usually those
4242 will be UTF-8 multi-byte sequences, but we can't be certain.
4243 Especially mind the 0xff character, which is a valid character in
4244 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4245 rule out compilers allowing it in identifiers. Note that
4246 conveniently, strcmp/strcasecmp are specified to compare
4247 characters interpreted as unsigned char. So what we do is treat
4248 the whole string as a base 256 number composed of a sequence of
4249 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4250 to 0, and carries 1 to the following more-significant position.
4251 If the very first character in SEARCH_NAME ends up incremented
4252 and carries/overflows, then the upper bound is the end of the
4253 list. The string after the empty string is also the empty
4256 Some examples of this operation:
4258 SEARCH_NAME => "+1" RESULT
4262 "\xff" "a" "\xff" => "\xff" "b"
4267 Then, with these symbols for example:
4273 completing "func" looks for symbols between "func" and
4274 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4275 which finds "func" and "func1", but not "fund".
4279 funcÿ (Latin1 'ÿ' [0xff])
4283 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4284 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4288 ÿÿ (Latin1 'ÿ' [0xff])
4291 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4292 the end of the list.
4294 std::string after
= search_name
;
4295 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4297 if (!after
.empty ())
4298 after
.back () = (unsigned char) after
.back () + 1;
4302 /* See declaration. */
4304 std::pair
<std::vector
<name_component
>::const_iterator
,
4305 std::vector
<name_component
>::const_iterator
>
4306 mapped_index_base::find_name_components_bounds
4307 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
4310 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4312 const char *lang_name
4313 = lookup_name_without_params
.language_lookup_name (lang
).c_str ();
4315 /* Comparison function object for lower_bound that matches against a
4316 given symbol name. */
4317 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4320 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4321 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4322 return name_cmp (elem_name
, name
) < 0;
4325 /* Comparison function object for upper_bound that matches against a
4326 given symbol name. */
4327 auto lookup_compare_upper
= [&] (const char *name
,
4328 const name_component
&elem
)
4330 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4331 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4332 return name_cmp (name
, elem_name
) < 0;
4335 auto begin
= this->name_components
.begin ();
4336 auto end
= this->name_components
.end ();
4338 /* Find the lower bound. */
4341 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
4344 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
4347 /* Find the upper bound. */
4350 if (lookup_name_without_params
.completion_mode ())
4352 /* In completion mode, we want UPPER to point past all
4353 symbols names that have the same prefix. I.e., with
4354 these symbols, and completing "func":
4356 function << lower bound
4358 other_function << upper bound
4360 We find the upper bound by looking for the insertion
4361 point of "func"-with-last-character-incremented,
4363 std::string after
= make_sort_after_prefix_name (lang_name
);
4366 return std::lower_bound (lower
, end
, after
.c_str (),
4367 lookup_compare_lower
);
4370 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4373 return {lower
, upper
};
4376 /* See declaration. */
4379 mapped_index_base::build_name_components ()
4381 if (!this->name_components
.empty ())
4384 this->name_components_casing
= case_sensitivity
;
4386 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4388 /* The code below only knows how to break apart components of C++
4389 symbol names (and other languages that use '::' as
4390 namespace/module separator) and Ada symbol names. */
4391 auto count
= this->symbol_name_count ();
4392 for (offset_type idx
= 0; idx
< count
; idx
++)
4394 if (this->symbol_name_slot_invalid (idx
))
4397 const char *name
= this->symbol_name_at (idx
);
4399 /* Add each name component to the name component table. */
4400 unsigned int previous_len
= 0;
4402 if (strstr (name
, "::") != nullptr)
4404 for (unsigned int current_len
= cp_find_first_component (name
);
4405 name
[current_len
] != '\0';
4406 current_len
+= cp_find_first_component (name
+ current_len
))
4408 gdb_assert (name
[current_len
] == ':');
4409 this->name_components
.push_back ({previous_len
, idx
});
4410 /* Skip the '::'. */
4412 previous_len
= current_len
;
4417 /* Handle the Ada encoded (aka mangled) form here. */
4418 for (const char *iter
= strstr (name
, "__");
4420 iter
= strstr (iter
, "__"))
4422 this->name_components
.push_back ({previous_len
, idx
});
4424 previous_len
= iter
- name
;
4428 this->name_components
.push_back ({previous_len
, idx
});
4431 /* Sort name_components elements by name. */
4432 auto name_comp_compare
= [&] (const name_component
&left
,
4433 const name_component
&right
)
4435 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4436 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4438 const char *left_name
= left_qualified
+ left
.name_offset
;
4439 const char *right_name
= right_qualified
+ right
.name_offset
;
4441 return name_cmp (left_name
, right_name
) < 0;
4444 std::sort (this->name_components
.begin (),
4445 this->name_components
.end (),
4449 /* Helper for dw2_expand_symtabs_matching that works with a
4450 mapped_index_base instead of the containing objfile. This is split
4451 to a separate function in order to be able to unit test the
4452 name_components matching using a mock mapped_index_base. For each
4453 symbol name that matches, calls MATCH_CALLBACK, passing it the
4454 symbol's index in the mapped_index_base symbol table. */
4457 dw2_expand_symtabs_matching_symbol
4458 (mapped_index_base
&index
,
4459 const lookup_name_info
&lookup_name_in
,
4460 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4461 enum search_domain kind
,
4462 gdb::function_view
<bool (offset_type
)> match_callback
)
4464 lookup_name_info lookup_name_without_params
4465 = lookup_name_in
.make_ignore_params ();
4467 /* Build the symbol name component sorted vector, if we haven't
4469 index
.build_name_components ();
4471 /* The same symbol may appear more than once in the range though.
4472 E.g., if we're looking for symbols that complete "w", and we have
4473 a symbol named "w1::w2", we'll find the two name components for
4474 that same symbol in the range. To be sure we only call the
4475 callback once per symbol, we first collect the symbol name
4476 indexes that matched in a temporary vector and ignore
4478 std::vector
<offset_type
> matches
;
4480 struct name_and_matcher
4482 symbol_name_matcher_ftype
*matcher
;
4483 const std::string
&name
;
4485 bool operator== (const name_and_matcher
&other
) const
4487 return matcher
== other
.matcher
&& name
== other
.name
;
4491 /* A vector holding all the different symbol name matchers, for all
4493 std::vector
<name_and_matcher
> matchers
;
4495 for (int i
= 0; i
< nr_languages
; i
++)
4497 enum language lang_e
= (enum language
) i
;
4499 const language_defn
*lang
= language_def (lang_e
);
4500 symbol_name_matcher_ftype
*name_matcher
4501 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4503 name_and_matcher key
{
4505 lookup_name_without_params
.language_lookup_name (lang_e
)
4508 /* Don't insert the same comparison routine more than once.
4509 Note that we do this linear walk. This is not a problem in
4510 practice because the number of supported languages is
4512 if (std::find (matchers
.begin (), matchers
.end (), key
)
4515 matchers
.push_back (std::move (key
));
4518 = index
.find_name_components_bounds (lookup_name_without_params
,
4521 /* Now for each symbol name in range, check to see if we have a name
4522 match, and if so, call the MATCH_CALLBACK callback. */
4524 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4526 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4528 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4529 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4532 matches
.push_back (bounds
.first
->idx
);
4536 std::sort (matches
.begin (), matches
.end ());
4538 /* Finally call the callback, once per match. */
4540 for (offset_type idx
: matches
)
4544 if (!match_callback (idx
))
4550 /* Above we use a type wider than idx's for 'prev', since 0 and
4551 (offset_type)-1 are both possible values. */
4552 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4557 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4559 /* A mock .gdb_index/.debug_names-like name index table, enough to
4560 exercise dw2_expand_symtabs_matching_symbol, which works with the
4561 mapped_index_base interface. Builds an index from the symbol list
4562 passed as parameter to the constructor. */
4563 class mock_mapped_index
: public mapped_index_base
4566 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4567 : m_symbol_table (symbols
)
4570 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4572 /* Return the number of names in the symbol table. */
4573 size_t symbol_name_count () const override
4575 return m_symbol_table
.size ();
4578 /* Get the name of the symbol at IDX in the symbol table. */
4579 const char *symbol_name_at (offset_type idx
) const override
4581 return m_symbol_table
[idx
];
4585 gdb::array_view
<const char *> m_symbol_table
;
4588 /* Convenience function that converts a NULL pointer to a "<null>"
4589 string, to pass to print routines. */
4592 string_or_null (const char *str
)
4594 return str
!= NULL
? str
: "<null>";
4597 /* Check if a lookup_name_info built from
4598 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4599 index. EXPECTED_LIST is the list of expected matches, in expected
4600 matching order. If no match expected, then an empty list is
4601 specified. Returns true on success. On failure prints a warning
4602 indicating the file:line that failed, and returns false. */
4605 check_match (const char *file
, int line
,
4606 mock_mapped_index
&mock_index
,
4607 const char *name
, symbol_name_match_type match_type
,
4608 bool completion_mode
,
4609 std::initializer_list
<const char *> expected_list
)
4611 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4613 bool matched
= true;
4615 auto mismatch
= [&] (const char *expected_str
,
4618 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4619 "expected=\"%s\", got=\"%s\"\n"),
4621 (match_type
== symbol_name_match_type::FULL
4623 name
, string_or_null (expected_str
), string_or_null (got
));
4627 auto expected_it
= expected_list
.begin ();
4628 auto expected_end
= expected_list
.end ();
4630 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4632 [&] (offset_type idx
)
4634 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4635 const char *expected_str
4636 = expected_it
== expected_end
? NULL
: *expected_it
++;
4638 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4639 mismatch (expected_str
, matched_name
);
4643 const char *expected_str
4644 = expected_it
== expected_end
? NULL
: *expected_it
++;
4645 if (expected_str
!= NULL
)
4646 mismatch (expected_str
, NULL
);
4651 /* The symbols added to the mock mapped_index for testing (in
4653 static const char *test_symbols
[] = {
4662 "ns2::tmpl<int>::foo2",
4663 "(anonymous namespace)::A::B::C",
4665 /* These are used to check that the increment-last-char in the
4666 matching algorithm for completion doesn't match "t1_fund" when
4667 completing "t1_func". */
4673 /* A UTF-8 name with multi-byte sequences to make sure that
4674 cp-name-parser understands this as a single identifier ("função"
4675 is "function" in PT). */
4678 /* \377 (0xff) is Latin1 'ÿ'. */
4681 /* \377 (0xff) is Latin1 'ÿ'. */
4685 /* A name with all sorts of complications. Starts with "z" to make
4686 it easier for the completion tests below. */
4687 #define Z_SYM_NAME \
4688 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4689 "::tuple<(anonymous namespace)::ui*, " \
4690 "std::default_delete<(anonymous namespace)::ui>, void>"
4695 /* Returns true if the mapped_index_base::find_name_component_bounds
4696 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4697 in completion mode. */
4700 check_find_bounds_finds (mapped_index_base
&index
,
4701 const char *search_name
,
4702 gdb::array_view
<const char *> expected_syms
)
4704 lookup_name_info
lookup_name (search_name
,
4705 symbol_name_match_type::FULL
, true);
4707 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4710 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4711 if (distance
!= expected_syms
.size ())
4714 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4716 auto nc_elem
= bounds
.first
+ exp_elem
;
4717 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4718 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4725 /* Test the lower-level mapped_index::find_name_component_bounds
4729 test_mapped_index_find_name_component_bounds ()
4731 mock_mapped_index
mock_index (test_symbols
);
4733 mock_index
.build_name_components ();
4735 /* Test the lower-level mapped_index::find_name_component_bounds
4736 method in completion mode. */
4738 static const char *expected_syms
[] = {
4743 SELF_CHECK (check_find_bounds_finds (mock_index
,
4744 "t1_func", expected_syms
));
4747 /* Check that the increment-last-char in the name matching algorithm
4748 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4750 static const char *expected_syms1
[] = {
4754 SELF_CHECK (check_find_bounds_finds (mock_index
,
4755 "\377", expected_syms1
));
4757 static const char *expected_syms2
[] = {
4760 SELF_CHECK (check_find_bounds_finds (mock_index
,
4761 "\377\377", expected_syms2
));
4765 /* Test dw2_expand_symtabs_matching_symbol. */
4768 test_dw2_expand_symtabs_matching_symbol ()
4770 mock_mapped_index
mock_index (test_symbols
);
4772 /* We let all tests run until the end even if some fails, for debug
4774 bool any_mismatch
= false;
4776 /* Create the expected symbols list (an initializer_list). Needed
4777 because lists have commas, and we need to pass them to CHECK,
4778 which is a macro. */
4779 #define EXPECT(...) { __VA_ARGS__ }
4781 /* Wrapper for check_match that passes down the current
4782 __FILE__/__LINE__. */
4783 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4784 any_mismatch |= !check_match (__FILE__, __LINE__, \
4786 NAME, MATCH_TYPE, COMPLETION_MODE, \
4789 /* Identity checks. */
4790 for (const char *sym
: test_symbols
)
4792 /* Should be able to match all existing symbols. */
4793 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4796 /* Should be able to match all existing symbols with
4798 std::string with_params
= std::string (sym
) + "(int)";
4799 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4802 /* Should be able to match all existing symbols with
4803 parameters and qualifiers. */
4804 with_params
= std::string (sym
) + " ( int ) const";
4805 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4808 /* This should really find sym, but cp-name-parser.y doesn't
4809 know about lvalue/rvalue qualifiers yet. */
4810 with_params
= std::string (sym
) + " ( int ) &&";
4811 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4815 /* Check that the name matching algorithm for completion doesn't get
4816 confused with Latin1 'ÿ' / 0xff. */
4818 static const char str
[] = "\377";
4819 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4820 EXPECT ("\377", "\377\377123"));
4823 /* Check that the increment-last-char in the matching algorithm for
4824 completion doesn't match "t1_fund" when completing "t1_func". */
4826 static const char str
[] = "t1_func";
4827 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4828 EXPECT ("t1_func", "t1_func1"));
4831 /* Check that completion mode works at each prefix of the expected
4834 static const char str
[] = "function(int)";
4835 size_t len
= strlen (str
);
4838 for (size_t i
= 1; i
< len
; i
++)
4840 lookup
.assign (str
, i
);
4841 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4842 EXPECT ("function"));
4846 /* While "w" is a prefix of both components, the match function
4847 should still only be called once. */
4849 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4851 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4855 /* Same, with a "complicated" symbol. */
4857 static const char str
[] = Z_SYM_NAME
;
4858 size_t len
= strlen (str
);
4861 for (size_t i
= 1; i
< len
; i
++)
4863 lookup
.assign (str
, i
);
4864 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4865 EXPECT (Z_SYM_NAME
));
4869 /* In FULL mode, an incomplete symbol doesn't match. */
4871 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4875 /* A complete symbol with parameters matches any overload, since the
4876 index has no overload info. */
4878 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4879 EXPECT ("std::zfunction", "std::zfunction2"));
4880 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4881 EXPECT ("std::zfunction", "std::zfunction2"));
4882 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4883 EXPECT ("std::zfunction", "std::zfunction2"));
4886 /* Check that whitespace is ignored appropriately. A symbol with a
4887 template argument list. */
4889 static const char expected
[] = "ns::foo<int>";
4890 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4892 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4896 /* Check that whitespace is ignored appropriately. A symbol with a
4897 template argument list that includes a pointer. */
4899 static const char expected
[] = "ns::foo<char*>";
4900 /* Try both completion and non-completion modes. */
4901 static const bool completion_mode
[2] = {false, true};
4902 for (size_t i
= 0; i
< 2; i
++)
4904 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4905 completion_mode
[i
], EXPECT (expected
));
4906 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4907 completion_mode
[i
], EXPECT (expected
));
4909 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4910 completion_mode
[i
], EXPECT (expected
));
4911 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4912 completion_mode
[i
], EXPECT (expected
));
4917 /* Check method qualifiers are ignored. */
4918 static const char expected
[] = "ns::foo<char*>";
4919 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4920 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4921 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4922 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4923 CHECK_MATCH ("foo < char * > ( int ) const",
4924 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4925 CHECK_MATCH ("foo < char * > ( int ) &&",
4926 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4929 /* Test lookup names that don't match anything. */
4931 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4934 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4938 /* Some wild matching tests, exercising "(anonymous namespace)",
4939 which should not be confused with a parameter list. */
4941 static const char *syms
[] = {
4945 "A :: B :: C ( int )",
4950 for (const char *s
: syms
)
4952 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4953 EXPECT ("(anonymous namespace)::A::B::C"));
4958 static const char expected
[] = "ns2::tmpl<int>::foo2";
4959 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4961 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4965 SELF_CHECK (!any_mismatch
);
4974 test_mapped_index_find_name_component_bounds ();
4975 test_dw2_expand_symtabs_matching_symbol ();
4978 }} // namespace selftests::dw2_expand_symtabs_matching
4980 #endif /* GDB_SELF_TEST */
4982 /* If FILE_MATCHER is NULL or if PER_CU has
4983 dwarf2_per_cu_quick_data::MARK set (see
4984 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4985 EXPANSION_NOTIFY on it. */
4988 dw2_expand_symtabs_matching_one
4989 (struct dwarf2_per_cu_data
*per_cu
,
4990 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4991 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4993 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4995 bool symtab_was_null
4996 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4998 dw2_instantiate_symtab (per_cu
, false);
5000 if (expansion_notify
!= NULL
5002 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5003 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5007 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5008 matched, to expand corresponding CUs that were marked. IDX is the
5009 index of the symbol name that matched. */
5012 dw2_expand_marked_cus
5013 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5014 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5015 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5018 offset_type
*vec
, vec_len
, vec_idx
;
5019 bool global_seen
= false;
5020 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5022 vec
= (offset_type
*) (index
.constant_pool
5023 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5024 vec_len
= MAYBE_SWAP (vec
[0]);
5025 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5027 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5028 /* This value is only valid for index versions >= 7. */
5029 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5030 gdb_index_symbol_kind symbol_kind
=
5031 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5032 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5033 /* Only check the symbol attributes if they're present.
5034 Indices prior to version 7 don't record them,
5035 and indices >= 7 may elide them for certain symbols
5036 (gold does this). */
5039 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5041 /* Work around gold/15646. */
5044 if (!is_static
&& global_seen
)
5050 /* Only check the symbol's kind if it has one. */
5055 case VARIABLES_DOMAIN
:
5056 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5059 case FUNCTIONS_DOMAIN
:
5060 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5064 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5072 /* Don't crash on bad data. */
5073 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5074 + dwarf2_per_objfile
->all_type_units
.size ()))
5076 complaint (_(".gdb_index entry has bad CU index"
5078 objfile_name (dwarf2_per_objfile
->objfile
));
5082 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5083 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5088 /* If FILE_MATCHER is non-NULL, set all the
5089 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5090 that match FILE_MATCHER. */
5093 dw_expand_symtabs_matching_file_matcher
5094 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5095 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5097 if (file_matcher
== NULL
)
5100 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5102 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5104 NULL
, xcalloc
, xfree
));
5105 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5107 NULL
, xcalloc
, xfree
));
5109 /* The rule is CUs specify all the files, including those used by
5110 any TU, so there's no need to scan TUs here. */
5112 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5116 per_cu
->v
.quick
->mark
= 0;
5118 /* We only need to look at symtabs not already expanded. */
5119 if (per_cu
->v
.quick
->compunit_symtab
)
5122 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5123 if (file_data
== NULL
)
5126 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5128 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5130 per_cu
->v
.quick
->mark
= 1;
5134 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5136 const char *this_real_name
;
5138 if (file_matcher (file_data
->file_names
[j
], false))
5140 per_cu
->v
.quick
->mark
= 1;
5144 /* Before we invoke realpath, which can get expensive when many
5145 files are involved, do a quick comparison of the basenames. */
5146 if (!basenames_may_differ
5147 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5151 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5152 if (file_matcher (this_real_name
, false))
5154 per_cu
->v
.quick
->mark
= 1;
5159 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5160 ? visited_found
.get ()
5161 : visited_not_found
.get (),
5168 dw2_expand_symtabs_matching
5169 (struct objfile
*objfile
,
5170 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5171 const lookup_name_info
&lookup_name
,
5172 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5173 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5174 enum search_domain kind
)
5176 struct dwarf2_per_objfile
*dwarf2_per_objfile
5177 = get_dwarf2_per_objfile (objfile
);
5179 /* index_table is NULL if OBJF_READNOW. */
5180 if (!dwarf2_per_objfile
->index_table
)
5183 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5185 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5187 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5189 kind
, [&] (offset_type idx
)
5191 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5192 expansion_notify
, kind
);
5197 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5200 static struct compunit_symtab
*
5201 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5206 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5207 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5210 if (cust
->includes
== NULL
)
5213 for (i
= 0; cust
->includes
[i
]; ++i
)
5215 struct compunit_symtab
*s
= cust
->includes
[i
];
5217 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5225 static struct compunit_symtab
*
5226 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5227 struct bound_minimal_symbol msymbol
,
5229 struct obj_section
*section
,
5232 struct dwarf2_per_cu_data
*data
;
5233 struct compunit_symtab
*result
;
5235 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5238 CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
5239 SECT_OFF_TEXT (objfile
));
5240 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5241 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5245 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5246 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5247 paddress (get_objfile_arch (objfile
), pc
));
5250 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5253 gdb_assert (result
!= NULL
);
5258 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5259 void *data
, int need_fullname
)
5261 struct dwarf2_per_objfile
*dwarf2_per_objfile
5262 = get_dwarf2_per_objfile (objfile
);
5264 if (!dwarf2_per_objfile
->filenames_cache
)
5266 dwarf2_per_objfile
->filenames_cache
.emplace ();
5268 htab_up
visited (htab_create_alloc (10,
5269 htab_hash_pointer
, htab_eq_pointer
,
5270 NULL
, xcalloc
, xfree
));
5272 /* The rule is CUs specify all the files, including those used
5273 by any TU, so there's no need to scan TUs here. We can
5274 ignore file names coming from already-expanded CUs. */
5276 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5278 if (per_cu
->v
.quick
->compunit_symtab
)
5280 void **slot
= htab_find_slot (visited
.get (),
5281 per_cu
->v
.quick
->file_names
,
5284 *slot
= per_cu
->v
.quick
->file_names
;
5288 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5290 /* We only need to look at symtabs not already expanded. */
5291 if (per_cu
->v
.quick
->compunit_symtab
)
5294 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5295 if (file_data
== NULL
)
5298 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5301 /* Already visited. */
5306 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5308 const char *filename
= file_data
->file_names
[j
];
5309 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5314 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5316 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5319 this_real_name
= gdb_realpath (filename
);
5320 (*fun
) (filename
, this_real_name
.get (), data
);
5325 dw2_has_symbols (struct objfile
*objfile
)
5330 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5333 dw2_find_last_source_symtab
,
5334 dw2_forget_cached_source_info
,
5335 dw2_map_symtabs_matching_filename
,
5339 dw2_expand_symtabs_for_function
,
5340 dw2_expand_all_symtabs
,
5341 dw2_expand_symtabs_with_fullname
,
5342 dw2_map_matching_symbols
,
5343 dw2_expand_symtabs_matching
,
5344 dw2_find_pc_sect_compunit_symtab
,
5346 dw2_map_symbol_filenames
5349 /* DWARF-5 debug_names reader. */
5351 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5352 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5354 /* A helper function that reads the .debug_names section in SECTION
5355 and fills in MAP. FILENAME is the name of the file containing the
5356 section; it is used for error reporting.
5358 Returns true if all went well, false otherwise. */
5361 read_debug_names_from_section (struct objfile
*objfile
,
5362 const char *filename
,
5363 struct dwarf2_section_info
*section
,
5364 mapped_debug_names
&map
)
5366 if (dwarf2_section_empty_p (section
))
5369 /* Older elfutils strip versions could keep the section in the main
5370 executable while splitting it for the separate debug info file. */
5371 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5374 dwarf2_read_section (objfile
, section
);
5376 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5378 const gdb_byte
*addr
= section
->buffer
;
5380 bfd
*const abfd
= get_section_bfd_owner (section
);
5382 unsigned int bytes_read
;
5383 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5386 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5387 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5388 if (bytes_read
+ length
!= section
->size
)
5390 /* There may be multiple per-CU indices. */
5391 warning (_("Section .debug_names in %s length %s does not match "
5392 "section length %s, ignoring .debug_names."),
5393 filename
, plongest (bytes_read
+ length
),
5394 pulongest (section
->size
));
5398 /* The version number. */
5399 uint16_t version
= read_2_bytes (abfd
, addr
);
5403 warning (_("Section .debug_names in %s has unsupported version %d, "
5404 "ignoring .debug_names."),
5410 uint16_t padding
= read_2_bytes (abfd
, addr
);
5414 warning (_("Section .debug_names in %s has unsupported padding %d, "
5415 "ignoring .debug_names."),
5420 /* comp_unit_count - The number of CUs in the CU list. */
5421 map
.cu_count
= read_4_bytes (abfd
, addr
);
5424 /* local_type_unit_count - The number of TUs in the local TU
5426 map
.tu_count
= read_4_bytes (abfd
, addr
);
5429 /* foreign_type_unit_count - The number of TUs in the foreign TU
5431 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5433 if (foreign_tu_count
!= 0)
5435 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5436 "ignoring .debug_names."),
5437 filename
, static_cast<unsigned long> (foreign_tu_count
));
5441 /* bucket_count - The number of hash buckets in the hash lookup
5443 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5446 /* name_count - The number of unique names in the index. */
5447 map
.name_count
= read_4_bytes (abfd
, addr
);
5450 /* abbrev_table_size - The size in bytes of the abbreviations
5452 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5455 /* augmentation_string_size - The size in bytes of the augmentation
5456 string. This value is rounded up to a multiple of 4. */
5457 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5459 map
.augmentation_is_gdb
= ((augmentation_string_size
5460 == sizeof (dwarf5_augmentation
))
5461 && memcmp (addr
, dwarf5_augmentation
,
5462 sizeof (dwarf5_augmentation
)) == 0);
5463 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5464 addr
+= augmentation_string_size
;
5467 map
.cu_table_reordered
= addr
;
5468 addr
+= map
.cu_count
* map
.offset_size
;
5470 /* List of Local TUs */
5471 map
.tu_table_reordered
= addr
;
5472 addr
+= map
.tu_count
* map
.offset_size
;
5474 /* Hash Lookup Table */
5475 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5476 addr
+= map
.bucket_count
* 4;
5477 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5478 addr
+= map
.name_count
* 4;
5481 map
.name_table_string_offs_reordered
= addr
;
5482 addr
+= map
.name_count
* map
.offset_size
;
5483 map
.name_table_entry_offs_reordered
= addr
;
5484 addr
+= map
.name_count
* map
.offset_size
;
5486 const gdb_byte
*abbrev_table_start
= addr
;
5489 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5494 const auto insertpair
5495 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5496 if (!insertpair
.second
)
5498 warning (_("Section .debug_names in %s has duplicate index %s, "
5499 "ignoring .debug_names."),
5500 filename
, pulongest (index_num
));
5503 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5504 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5509 mapped_debug_names::index_val::attr attr
;
5510 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5512 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5514 if (attr
.form
== DW_FORM_implicit_const
)
5516 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5520 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5522 indexval
.attr_vec
.push_back (std::move (attr
));
5525 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5527 warning (_("Section .debug_names in %s has abbreviation_table "
5528 "of size %s vs. written as %u, ignoring .debug_names."),
5529 filename
, plongest (addr
- abbrev_table_start
),
5533 map
.entry_pool
= addr
;
5538 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5542 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5543 const mapped_debug_names
&map
,
5544 dwarf2_section_info
§ion
,
5547 sect_offset sect_off_prev
;
5548 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5550 sect_offset sect_off_next
;
5551 if (i
< map
.cu_count
)
5554 = (sect_offset
) (extract_unsigned_integer
5555 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5557 map
.dwarf5_byte_order
));
5560 sect_off_next
= (sect_offset
) section
.size
;
5563 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5564 dwarf2_per_cu_data
*per_cu
5565 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5566 sect_off_prev
, length
);
5567 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5569 sect_off_prev
= sect_off_next
;
5573 /* Read the CU list from the mapped index, and use it to create all
5574 the CU objects for this dwarf2_per_objfile. */
5577 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5578 const mapped_debug_names
&map
,
5579 const mapped_debug_names
&dwz_map
)
5581 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5582 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5584 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5585 dwarf2_per_objfile
->info
,
5586 false /* is_dwz */);
5588 if (dwz_map
.cu_count
== 0)
5591 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5592 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5596 /* Read .debug_names. If everything went ok, initialize the "quick"
5597 elements of all the CUs and return true. Otherwise, return false. */
5600 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5602 std::unique_ptr
<mapped_debug_names
> map
5603 (new mapped_debug_names (dwarf2_per_objfile
));
5604 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5605 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5607 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5608 &dwarf2_per_objfile
->debug_names
,
5612 /* Don't use the index if it's empty. */
5613 if (map
->name_count
== 0)
5616 /* If there is a .dwz file, read it so we can get its CU list as
5618 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5621 if (!read_debug_names_from_section (objfile
,
5622 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5623 &dwz
->debug_names
, dwz_map
))
5625 warning (_("could not read '.debug_names' section from %s; skipping"),
5626 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5631 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5633 if (map
->tu_count
!= 0)
5635 /* We can only handle a single .debug_types when we have an
5637 if (dwarf2_per_objfile
->types
.size () != 1)
5640 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5642 create_signatured_type_table_from_debug_names
5643 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5646 create_addrmap_from_aranges (dwarf2_per_objfile
,
5647 &dwarf2_per_objfile
->debug_aranges
);
5649 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5650 dwarf2_per_objfile
->using_index
= 1;
5651 dwarf2_per_objfile
->quick_file_names_table
=
5652 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5657 /* Type used to manage iterating over all CUs looking for a symbol for
5660 class dw2_debug_names_iterator
5663 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5664 gdb::optional
<block_enum
> block_index
,
5667 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5668 m_addr (find_vec_in_debug_names (map
, name
))
5671 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5672 search_domain search
, uint32_t namei
)
5675 m_addr (find_vec_in_debug_names (map
, namei
))
5678 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5679 block_enum block_index
, domain_enum domain
,
5681 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5682 m_addr (find_vec_in_debug_names (map
, namei
))
5685 /* Return the next matching CU or NULL if there are no more. */
5686 dwarf2_per_cu_data
*next ();
5689 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5691 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5694 /* The internalized form of .debug_names. */
5695 const mapped_debug_names
&m_map
;
5697 /* If set, only look for symbols that match that block. Valid values are
5698 GLOBAL_BLOCK and STATIC_BLOCK. */
5699 const gdb::optional
<block_enum
> m_block_index
;
5701 /* The kind of symbol we're looking for. */
5702 const domain_enum m_domain
= UNDEF_DOMAIN
;
5703 const search_domain m_search
= ALL_DOMAIN
;
5705 /* The list of CUs from the index entry of the symbol, or NULL if
5707 const gdb_byte
*m_addr
;
5711 mapped_debug_names::namei_to_name (uint32_t namei
) const
5713 const ULONGEST namei_string_offs
5714 = extract_unsigned_integer ((name_table_string_offs_reordered
5715 + namei
* offset_size
),
5718 return read_indirect_string_at_offset
5719 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5722 /* Find a slot in .debug_names for the object named NAME. If NAME is
5723 found, return pointer to its pool data. If NAME cannot be found,
5727 dw2_debug_names_iterator::find_vec_in_debug_names
5728 (const mapped_debug_names
&map
, const char *name
)
5730 int (*cmp
) (const char *, const char *);
5732 gdb::unique_xmalloc_ptr
<char> without_params
;
5733 if (current_language
->la_language
== language_cplus
5734 || current_language
->la_language
== language_fortran
5735 || current_language
->la_language
== language_d
)
5737 /* NAME is already canonical. Drop any qualifiers as
5738 .debug_names does not contain any. */
5740 if (strchr (name
, '(') != NULL
)
5742 without_params
= cp_remove_params (name
);
5743 if (without_params
!= NULL
)
5744 name
= without_params
.get ();
5748 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5750 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5752 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5753 (map
.bucket_table_reordered
5754 + (full_hash
% map
.bucket_count
)), 4,
5755 map
.dwarf5_byte_order
);
5759 if (namei
>= map
.name_count
)
5761 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5763 namei
, map
.name_count
,
5764 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5770 const uint32_t namei_full_hash
5771 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5772 (map
.hash_table_reordered
+ namei
), 4,
5773 map
.dwarf5_byte_order
);
5774 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5777 if (full_hash
== namei_full_hash
)
5779 const char *const namei_string
= map
.namei_to_name (namei
);
5781 #if 0 /* An expensive sanity check. */
5782 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5784 complaint (_("Wrong .debug_names hash for string at index %u "
5786 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5791 if (cmp (namei_string
, name
) == 0)
5793 const ULONGEST namei_entry_offs
5794 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5795 + namei
* map
.offset_size
),
5796 map
.offset_size
, map
.dwarf5_byte_order
);
5797 return map
.entry_pool
+ namei_entry_offs
;
5802 if (namei
>= map
.name_count
)
5808 dw2_debug_names_iterator::find_vec_in_debug_names
5809 (const mapped_debug_names
&map
, uint32_t namei
)
5811 if (namei
>= map
.name_count
)
5813 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5815 namei
, map
.name_count
,
5816 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5820 const ULONGEST namei_entry_offs
5821 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5822 + namei
* map
.offset_size
),
5823 map
.offset_size
, map
.dwarf5_byte_order
);
5824 return map
.entry_pool
+ namei_entry_offs
;
5827 /* See dw2_debug_names_iterator. */
5829 dwarf2_per_cu_data
*
5830 dw2_debug_names_iterator::next ()
5835 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5836 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5837 bfd
*const abfd
= objfile
->obfd
;
5841 unsigned int bytes_read
;
5842 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5843 m_addr
+= bytes_read
;
5847 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5848 if (indexval_it
== m_map
.abbrev_map
.cend ())
5850 complaint (_("Wrong .debug_names undefined abbrev code %s "
5852 pulongest (abbrev
), objfile_name (objfile
));
5855 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5856 enum class symbol_linkage
{
5860 } symbol_linkage_
= symbol_linkage::unknown
;
5861 dwarf2_per_cu_data
*per_cu
= NULL
;
5862 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5867 case DW_FORM_implicit_const
:
5868 ull
= attr
.implicit_const
;
5870 case DW_FORM_flag_present
:
5874 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5875 m_addr
+= bytes_read
;
5878 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5879 dwarf_form_name (attr
.form
),
5880 objfile_name (objfile
));
5883 switch (attr
.dw_idx
)
5885 case DW_IDX_compile_unit
:
5886 /* Don't crash on bad data. */
5887 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5889 complaint (_(".debug_names entry has bad CU index %s"
5892 objfile_name (dwarf2_per_objfile
->objfile
));
5895 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5897 case DW_IDX_type_unit
:
5898 /* Don't crash on bad data. */
5899 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5901 complaint (_(".debug_names entry has bad TU index %s"
5904 objfile_name (dwarf2_per_objfile
->objfile
));
5907 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5909 case DW_IDX_GNU_internal
:
5910 if (!m_map
.augmentation_is_gdb
)
5912 symbol_linkage_
= symbol_linkage::static_
;
5914 case DW_IDX_GNU_external
:
5915 if (!m_map
.augmentation_is_gdb
)
5917 symbol_linkage_
= symbol_linkage::extern_
;
5922 /* Skip if already read in. */
5923 if (per_cu
->v
.quick
->compunit_symtab
)
5926 /* Check static vs global. */
5927 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5929 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5930 const bool symbol_is_static
=
5931 symbol_linkage_
== symbol_linkage::static_
;
5932 if (want_static
!= symbol_is_static
)
5936 /* Match dw2_symtab_iter_next, symbol_kind
5937 and debug_names::psymbol_tag. */
5941 switch (indexval
.dwarf_tag
)
5943 case DW_TAG_variable
:
5944 case DW_TAG_subprogram
:
5945 /* Some types are also in VAR_DOMAIN. */
5946 case DW_TAG_typedef
:
5947 case DW_TAG_structure_type
:
5954 switch (indexval
.dwarf_tag
)
5956 case DW_TAG_typedef
:
5957 case DW_TAG_structure_type
:
5964 switch (indexval
.dwarf_tag
)
5967 case DW_TAG_variable
:
5977 /* Match dw2_expand_symtabs_matching, symbol_kind and
5978 debug_names::psymbol_tag. */
5981 case VARIABLES_DOMAIN
:
5982 switch (indexval
.dwarf_tag
)
5984 case DW_TAG_variable
:
5990 case FUNCTIONS_DOMAIN
:
5991 switch (indexval
.dwarf_tag
)
5993 case DW_TAG_subprogram
:
6000 switch (indexval
.dwarf_tag
)
6002 case DW_TAG_typedef
:
6003 case DW_TAG_structure_type
:
6016 static struct compunit_symtab
*
6017 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
6018 const char *name
, domain_enum domain
)
6020 struct dwarf2_per_objfile
*dwarf2_per_objfile
6021 = get_dwarf2_per_objfile (objfile
);
6023 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6026 /* index is NULL if OBJF_READNOW. */
6029 const auto &map
= *mapp
;
6031 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
6033 struct compunit_symtab
*stab_best
= NULL
;
6034 struct dwarf2_per_cu_data
*per_cu
;
6035 while ((per_cu
= iter
.next ()) != NULL
)
6037 struct symbol
*sym
, *with_opaque
= NULL
;
6038 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6039 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6040 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6042 sym
= block_find_symbol (block
, name
, domain
,
6043 block_find_non_opaque_type_preferred
,
6046 /* Some caution must be observed with overloaded functions and
6047 methods, since the index will not contain any overload
6048 information (but NAME might contain it). */
6051 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6053 if (with_opaque
!= NULL
6054 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6057 /* Keep looking through other CUs. */
6063 /* This dumps minimal information about .debug_names. It is called
6064 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6065 uses this to verify that .debug_names has been loaded. */
6068 dw2_debug_names_dump (struct objfile
*objfile
)
6070 struct dwarf2_per_objfile
*dwarf2_per_objfile
6071 = get_dwarf2_per_objfile (objfile
);
6073 gdb_assert (dwarf2_per_objfile
->using_index
);
6074 printf_filtered (".debug_names:");
6075 if (dwarf2_per_objfile
->debug_names_table
)
6076 printf_filtered (" exists\n");
6078 printf_filtered (" faked for \"readnow\"\n");
6079 printf_filtered ("\n");
6083 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6084 const char *func_name
)
6086 struct dwarf2_per_objfile
*dwarf2_per_objfile
6087 = get_dwarf2_per_objfile (objfile
);
6089 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6090 if (dwarf2_per_objfile
->debug_names_table
)
6092 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6094 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
6096 struct dwarf2_per_cu_data
*per_cu
;
6097 while ((per_cu
= iter
.next ()) != NULL
)
6098 dw2_instantiate_symtab (per_cu
, false);
6103 dw2_debug_names_map_matching_symbols
6104 (struct objfile
*objfile
,
6105 const lookup_name_info
&name
, domain_enum domain
,
6107 gdb::function_view
<symbol_found_callback_ftype
> callback
,
6108 symbol_compare_ftype
*ordered_compare
)
6110 struct dwarf2_per_objfile
*dwarf2_per_objfile
6111 = get_dwarf2_per_objfile (objfile
);
6113 /* debug_names_table is NULL if OBJF_READNOW. */
6114 if (!dwarf2_per_objfile
->debug_names_table
)
6117 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6118 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
6120 const char *match_name
= name
.ada ().lookup_name ().c_str ();
6121 auto matcher
= [&] (const char *symname
)
6123 if (ordered_compare
== nullptr)
6125 return ordered_compare (symname
, match_name
) == 0;
6128 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
6129 [&] (offset_type namei
)
6131 /* The name was matched, now expand corresponding CUs that were
6133 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
6135 struct dwarf2_per_cu_data
*per_cu
;
6136 while ((per_cu
= iter
.next ()) != NULL
)
6137 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
6141 /* It's a shame we couldn't do this inside the
6142 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
6143 that have already been expanded. Instead, this loop matches what
6144 the psymtab code does. */
6145 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
6147 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
6148 if (cust
!= nullptr)
6150 const struct block
*block
6151 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
6152 if (!iterate_over_symbols_terminated (block
, name
,
6160 dw2_debug_names_expand_symtabs_matching
6161 (struct objfile
*objfile
,
6162 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6163 const lookup_name_info
&lookup_name
,
6164 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6165 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6166 enum search_domain kind
)
6168 struct dwarf2_per_objfile
*dwarf2_per_objfile
6169 = get_dwarf2_per_objfile (objfile
);
6171 /* debug_names_table is NULL if OBJF_READNOW. */
6172 if (!dwarf2_per_objfile
->debug_names_table
)
6175 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6177 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6179 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6181 kind
, [&] (offset_type namei
)
6183 /* The name was matched, now expand corresponding CUs that were
6185 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6187 struct dwarf2_per_cu_data
*per_cu
;
6188 while ((per_cu
= iter
.next ()) != NULL
)
6189 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6195 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6198 dw2_find_last_source_symtab
,
6199 dw2_forget_cached_source_info
,
6200 dw2_map_symtabs_matching_filename
,
6201 dw2_debug_names_lookup_symbol
,
6203 dw2_debug_names_dump
,
6204 dw2_debug_names_expand_symtabs_for_function
,
6205 dw2_expand_all_symtabs
,
6206 dw2_expand_symtabs_with_fullname
,
6207 dw2_debug_names_map_matching_symbols
,
6208 dw2_debug_names_expand_symtabs_matching
,
6209 dw2_find_pc_sect_compunit_symtab
,
6211 dw2_map_symbol_filenames
6214 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6215 to either a dwarf2_per_objfile or dwz_file object. */
6217 template <typename T
>
6218 static gdb::array_view
<const gdb_byte
>
6219 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6221 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6223 if (dwarf2_section_empty_p (section
))
6226 /* Older elfutils strip versions could keep the section in the main
6227 executable while splitting it for the separate debug info file. */
6228 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
6231 dwarf2_read_section (obj
, section
);
6233 /* dwarf2_section_info::size is a bfd_size_type, while
6234 gdb::array_view works with size_t. On 32-bit hosts, with
6235 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6236 is 32-bit. So we need an explicit narrowing conversion here.
6237 This is fine, because it's impossible to allocate or mmap an
6238 array/buffer larger than what size_t can represent. */
6239 return gdb::make_array_view (section
->buffer
, section
->size
);
6242 /* Lookup the index cache for the contents of the index associated to
6245 static gdb::array_view
<const gdb_byte
>
6246 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
6248 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6249 if (build_id
== nullptr)
6252 return global_index_cache
.lookup_gdb_index (build_id
,
6253 &dwarf2_obj
->index_cache_res
);
6256 /* Same as the above, but for DWZ. */
6258 static gdb::array_view
<const gdb_byte
>
6259 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6261 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6262 if (build_id
== nullptr)
6265 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6268 /* See symfile.h. */
6271 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6273 struct dwarf2_per_objfile
*dwarf2_per_objfile
6274 = get_dwarf2_per_objfile (objfile
);
6276 /* If we're about to read full symbols, don't bother with the
6277 indices. In this case we also don't care if some other debug
6278 format is making psymtabs, because they are all about to be
6280 if ((objfile
->flags
& OBJF_READNOW
))
6282 dwarf2_per_objfile
->using_index
= 1;
6283 create_all_comp_units (dwarf2_per_objfile
);
6284 create_all_type_units (dwarf2_per_objfile
);
6285 dwarf2_per_objfile
->quick_file_names_table
6286 = create_quick_file_names_table
6287 (dwarf2_per_objfile
->all_comp_units
.size ());
6289 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6290 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6292 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6294 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6295 struct dwarf2_per_cu_quick_data
);
6298 /* Return 1 so that gdb sees the "quick" functions. However,
6299 these functions will be no-ops because we will have expanded
6301 *index_kind
= dw_index_kind::GDB_INDEX
;
6305 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6307 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6311 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6312 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6313 get_gdb_index_contents_from_section
<dwz_file
>))
6315 *index_kind
= dw_index_kind::GDB_INDEX
;
6319 /* ... otherwise, try to find the index in the index cache. */
6320 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6321 get_gdb_index_contents_from_cache
,
6322 get_gdb_index_contents_from_cache_dwz
))
6324 global_index_cache
.hit ();
6325 *index_kind
= dw_index_kind::GDB_INDEX
;
6329 global_index_cache
.miss ();
6335 /* Build a partial symbol table. */
6338 dwarf2_build_psymtabs (struct objfile
*objfile
)
6340 struct dwarf2_per_objfile
*dwarf2_per_objfile
6341 = get_dwarf2_per_objfile (objfile
);
6343 init_psymbol_list (objfile
, 1024);
6347 /* This isn't really ideal: all the data we allocate on the
6348 objfile's obstack is still uselessly kept around. However,
6349 freeing it seems unsafe. */
6350 psymtab_discarder
psymtabs (objfile
);
6351 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6354 /* (maybe) store an index in the cache. */
6355 global_index_cache
.store (dwarf2_per_objfile
);
6357 catch (const gdb_exception_error
&except
)
6359 exception_print (gdb_stderr
, except
);
6363 /* Return the total length of the CU described by HEADER. */
6366 get_cu_length (const struct comp_unit_head
*header
)
6368 return header
->initial_length_size
+ header
->length
;
6371 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6374 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6376 sect_offset bottom
= cu_header
->sect_off
;
6377 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6379 return sect_off
>= bottom
&& sect_off
< top
;
6382 /* Find the base address of the compilation unit for range lists and
6383 location lists. It will normally be specified by DW_AT_low_pc.
6384 In DWARF-3 draft 4, the base address could be overridden by
6385 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6386 compilation units with discontinuous ranges. */
6389 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6391 struct attribute
*attr
;
6394 cu
->base_address
= 0;
6396 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6399 cu
->base_address
= attr_value_as_address (attr
);
6404 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6407 cu
->base_address
= attr_value_as_address (attr
);
6413 /* Read in the comp unit header information from the debug_info at info_ptr.
6414 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6415 NOTE: This leaves members offset, first_die_offset to be filled in
6418 static const gdb_byte
*
6419 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6420 const gdb_byte
*info_ptr
,
6421 struct dwarf2_section_info
*section
,
6422 rcuh_kind section_kind
)
6425 unsigned int bytes_read
;
6426 const char *filename
= get_section_file_name (section
);
6427 bfd
*abfd
= get_section_bfd_owner (section
);
6429 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6430 cu_header
->initial_length_size
= bytes_read
;
6431 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6432 info_ptr
+= bytes_read
;
6433 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6434 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6435 error (_("Dwarf Error: wrong version in compilation unit header "
6436 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6437 cu_header
->version
, filename
);
6439 if (cu_header
->version
< 5)
6440 switch (section_kind
)
6442 case rcuh_kind::COMPILE
:
6443 cu_header
->unit_type
= DW_UT_compile
;
6445 case rcuh_kind::TYPE
:
6446 cu_header
->unit_type
= DW_UT_type
;
6449 internal_error (__FILE__
, __LINE__
,
6450 _("read_comp_unit_head: invalid section_kind"));
6454 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6455 (read_1_byte (abfd
, info_ptr
));
6457 switch (cu_header
->unit_type
)
6461 case DW_UT_skeleton
:
6462 case DW_UT_split_compile
:
6463 if (section_kind
!= rcuh_kind::COMPILE
)
6464 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6465 "(is %s, should be %s) [in module %s]"),
6466 dwarf_unit_type_name (cu_header
->unit_type
),
6467 dwarf_unit_type_name (DW_UT_type
), filename
);
6470 case DW_UT_split_type
:
6471 section_kind
= rcuh_kind::TYPE
;
6474 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6475 "(is %#04x, should be one of: %s, %s, %s, %s or %s) "
6476 "[in module %s]"), cu_header
->unit_type
,
6477 dwarf_unit_type_name (DW_UT_compile
),
6478 dwarf_unit_type_name (DW_UT_skeleton
),
6479 dwarf_unit_type_name (DW_UT_split_compile
),
6480 dwarf_unit_type_name (DW_UT_type
),
6481 dwarf_unit_type_name (DW_UT_split_type
), filename
);
6484 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6487 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6490 info_ptr
+= bytes_read
;
6491 if (cu_header
->version
< 5)
6493 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6496 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6497 if (signed_addr
< 0)
6498 internal_error (__FILE__
, __LINE__
,
6499 _("read_comp_unit_head: dwarf from non elf file"));
6500 cu_header
->signed_addr_p
= signed_addr
;
6502 bool header_has_signature
= section_kind
== rcuh_kind::TYPE
6503 || cu_header
->unit_type
== DW_UT_skeleton
6504 || cu_header
->unit_type
== DW_UT_split_compile
;
6506 if (header_has_signature
)
6508 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6512 if (section_kind
== rcuh_kind::TYPE
)
6514 LONGEST type_offset
;
6515 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6516 info_ptr
+= bytes_read
;
6517 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6518 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6519 error (_("Dwarf Error: Too big type_offset in compilation unit "
6520 "header (is %s) [in module %s]"), plongest (type_offset
),
6527 /* Helper function that returns the proper abbrev section for
6530 static struct dwarf2_section_info
*
6531 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6533 struct dwarf2_section_info
*abbrev
;
6534 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6536 if (this_cu
->is_dwz
)
6537 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6539 abbrev
= &dwarf2_per_objfile
->abbrev
;
6544 /* Subroutine of read_and_check_comp_unit_head and
6545 read_and_check_type_unit_head to simplify them.
6546 Perform various error checking on the header. */
6549 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6550 struct comp_unit_head
*header
,
6551 struct dwarf2_section_info
*section
,
6552 struct dwarf2_section_info
*abbrev_section
)
6554 const char *filename
= get_section_file_name (section
);
6556 if (to_underlying (header
->abbrev_sect_off
)
6557 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6558 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6559 "(offset %s + 6) [in module %s]"),
6560 sect_offset_str (header
->abbrev_sect_off
),
6561 sect_offset_str (header
->sect_off
),
6564 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6565 avoid potential 32-bit overflow. */
6566 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6568 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6569 "(offset %s + 0) [in module %s]"),
6570 header
->length
, sect_offset_str (header
->sect_off
),
6574 /* Read in a CU/TU header and perform some basic error checking.
6575 The contents of the header are stored in HEADER.
6576 The result is a pointer to the start of the first DIE. */
6578 static const gdb_byte
*
6579 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6580 struct comp_unit_head
*header
,
6581 struct dwarf2_section_info
*section
,
6582 struct dwarf2_section_info
*abbrev_section
,
6583 const gdb_byte
*info_ptr
,
6584 rcuh_kind section_kind
)
6586 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6588 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6590 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6592 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6594 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6600 /* Fetch the abbreviation table offset from a comp or type unit header. */
6603 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6604 struct dwarf2_section_info
*section
,
6605 sect_offset sect_off
)
6607 bfd
*abfd
= get_section_bfd_owner (section
);
6608 const gdb_byte
*info_ptr
;
6609 unsigned int initial_length_size
, offset_size
;
6612 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6613 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6614 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6615 offset_size
= initial_length_size
== 4 ? 4 : 8;
6616 info_ptr
+= initial_length_size
;
6618 version
= read_2_bytes (abfd
, info_ptr
);
6622 /* Skip unit type and address size. */
6626 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6629 /* Allocate a new partial symtab for file named NAME and mark this new
6630 partial symtab as being an include of PST. */
6633 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6634 struct objfile
*objfile
)
6636 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6638 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6640 /* It shares objfile->objfile_obstack. */
6641 subpst
->dirname
= pst
->dirname
;
6644 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6645 subpst
->dependencies
[0] = pst
;
6646 subpst
->number_of_dependencies
= 1;
6648 subpst
->read_symtab
= pst
->read_symtab
;
6650 /* No private part is necessary for include psymtabs. This property
6651 can be used to differentiate between such include psymtabs and
6652 the regular ones. */
6653 subpst
->read_symtab_private
= NULL
;
6656 /* Read the Line Number Program data and extract the list of files
6657 included by the source file represented by PST. Build an include
6658 partial symtab for each of these included files. */
6661 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6662 struct die_info
*die
,
6663 struct partial_symtab
*pst
)
6666 struct attribute
*attr
;
6668 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6670 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6672 return; /* No linetable, so no includes. */
6674 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6675 that we pass in the raw text_low here; that is ok because we're
6676 only decoding the line table to make include partial symtabs, and
6677 so the addresses aren't really used. */
6678 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6679 pst
->raw_text_low (), 1);
6683 hash_signatured_type (const void *item
)
6685 const struct signatured_type
*sig_type
6686 = (const struct signatured_type
*) item
;
6688 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6689 return sig_type
->signature
;
6693 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6695 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6696 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6698 return lhs
->signature
== rhs
->signature
;
6701 /* Allocate a hash table for signatured types. */
6704 allocate_signatured_type_table (struct objfile
*objfile
)
6706 return htab_create_alloc_ex (41,
6707 hash_signatured_type
,
6710 &objfile
->objfile_obstack
,
6711 hashtab_obstack_allocate
,
6712 dummy_obstack_deallocate
);
6715 /* A helper function to add a signatured type CU to a table. */
6718 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6720 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6721 std::vector
<signatured_type
*> *all_type_units
6722 = (std::vector
<signatured_type
*> *) datum
;
6724 all_type_units
->push_back (sigt
);
6729 /* A helper for create_debug_types_hash_table. Read types from SECTION
6730 and fill them into TYPES_HTAB. It will process only type units,
6731 therefore DW_UT_type. */
6734 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6735 struct dwo_file
*dwo_file
,
6736 dwarf2_section_info
*section
, htab_t
&types_htab
,
6737 rcuh_kind section_kind
)
6739 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6740 struct dwarf2_section_info
*abbrev_section
;
6742 const gdb_byte
*info_ptr
, *end_ptr
;
6744 abbrev_section
= (dwo_file
!= NULL
6745 ? &dwo_file
->sections
.abbrev
6746 : &dwarf2_per_objfile
->abbrev
);
6748 if (dwarf_read_debug
)
6749 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6750 get_section_name (section
),
6751 get_section_file_name (abbrev_section
));
6753 dwarf2_read_section (objfile
, section
);
6754 info_ptr
= section
->buffer
;
6756 if (info_ptr
== NULL
)
6759 /* We can't set abfd until now because the section may be empty or
6760 not present, in which case the bfd is unknown. */
6761 abfd
= get_section_bfd_owner (section
);
6763 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6764 because we don't need to read any dies: the signature is in the
6767 end_ptr
= info_ptr
+ section
->size
;
6768 while (info_ptr
< end_ptr
)
6770 struct signatured_type
*sig_type
;
6771 struct dwo_unit
*dwo_tu
;
6773 const gdb_byte
*ptr
= info_ptr
;
6774 struct comp_unit_head header
;
6775 unsigned int length
;
6777 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6779 /* Initialize it due to a false compiler warning. */
6780 header
.signature
= -1;
6781 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6783 /* We need to read the type's signature in order to build the hash
6784 table, but we don't need anything else just yet. */
6786 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6787 abbrev_section
, ptr
, section_kind
);
6789 length
= get_cu_length (&header
);
6791 /* Skip dummy type units. */
6792 if (ptr
>= info_ptr
+ length
6793 || peek_abbrev_code (abfd
, ptr
) == 0
6794 || header
.unit_type
!= DW_UT_type
)
6800 if (types_htab
== NULL
)
6803 types_htab
= allocate_dwo_unit_table (objfile
);
6805 types_htab
= allocate_signatured_type_table (objfile
);
6811 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6813 dwo_tu
->dwo_file
= dwo_file
;
6814 dwo_tu
->signature
= header
.signature
;
6815 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6816 dwo_tu
->section
= section
;
6817 dwo_tu
->sect_off
= sect_off
;
6818 dwo_tu
->length
= length
;
6822 /* N.B.: type_offset is not usable if this type uses a DWO file.
6823 The real type_offset is in the DWO file. */
6825 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6826 struct signatured_type
);
6827 sig_type
->signature
= header
.signature
;
6828 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6829 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6830 sig_type
->per_cu
.is_debug_types
= 1;
6831 sig_type
->per_cu
.section
= section
;
6832 sig_type
->per_cu
.sect_off
= sect_off
;
6833 sig_type
->per_cu
.length
= length
;
6836 slot
= htab_find_slot (types_htab
,
6837 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6839 gdb_assert (slot
!= NULL
);
6842 sect_offset dup_sect_off
;
6846 const struct dwo_unit
*dup_tu
6847 = (const struct dwo_unit
*) *slot
;
6849 dup_sect_off
= dup_tu
->sect_off
;
6853 const struct signatured_type
*dup_tu
6854 = (const struct signatured_type
*) *slot
;
6856 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6859 complaint (_("debug type entry at offset %s is duplicate to"
6860 " the entry at offset %s, signature %s"),
6861 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6862 hex_string (header
.signature
));
6864 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6866 if (dwarf_read_debug
> 1)
6867 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6868 sect_offset_str (sect_off
),
6869 hex_string (header
.signature
));
6875 /* Create the hash table of all entries in the .debug_types
6876 (or .debug_types.dwo) section(s).
6877 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6878 otherwise it is NULL.
6880 The result is a pointer to the hash table or NULL if there are no types.
6882 Note: This function processes DWO files only, not DWP files. */
6885 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6886 struct dwo_file
*dwo_file
,
6887 gdb::array_view
<dwarf2_section_info
> type_sections
,
6890 for (dwarf2_section_info
§ion
: type_sections
)
6891 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6892 types_htab
, rcuh_kind::TYPE
);
6895 /* Create the hash table of all entries in the .debug_types section,
6896 and initialize all_type_units.
6897 The result is zero if there is an error (e.g. missing .debug_types section),
6898 otherwise non-zero. */
6901 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6903 htab_t types_htab
= NULL
;
6905 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6906 &dwarf2_per_objfile
->info
, types_htab
,
6907 rcuh_kind::COMPILE
);
6908 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6909 dwarf2_per_objfile
->types
, types_htab
);
6910 if (types_htab
== NULL
)
6912 dwarf2_per_objfile
->signatured_types
= NULL
;
6916 dwarf2_per_objfile
->signatured_types
= types_htab
;
6918 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6919 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6921 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6922 &dwarf2_per_objfile
->all_type_units
);
6927 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6928 If SLOT is non-NULL, it is the entry to use in the hash table.
6929 Otherwise we find one. */
6931 static struct signatured_type
*
6932 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6935 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6937 if (dwarf2_per_objfile
->all_type_units
.size ()
6938 == dwarf2_per_objfile
->all_type_units
.capacity ())
6939 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6941 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6942 struct signatured_type
);
6944 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6945 sig_type
->signature
= sig
;
6946 sig_type
->per_cu
.is_debug_types
= 1;
6947 if (dwarf2_per_objfile
->using_index
)
6949 sig_type
->per_cu
.v
.quick
=
6950 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6951 struct dwarf2_per_cu_quick_data
);
6956 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6959 gdb_assert (*slot
== NULL
);
6961 /* The rest of sig_type must be filled in by the caller. */
6965 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6966 Fill in SIG_ENTRY with DWO_ENTRY. */
6969 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6970 struct signatured_type
*sig_entry
,
6971 struct dwo_unit
*dwo_entry
)
6973 /* Make sure we're not clobbering something we don't expect to. */
6974 gdb_assert (! sig_entry
->per_cu
.queued
);
6975 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6976 if (dwarf2_per_objfile
->using_index
)
6978 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6979 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6982 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6983 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6984 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6985 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6986 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6988 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6989 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6990 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6991 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6992 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6993 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6994 sig_entry
->dwo_unit
= dwo_entry
;
6997 /* Subroutine of lookup_signatured_type.
6998 If we haven't read the TU yet, create the signatured_type data structure
6999 for a TU to be read in directly from a DWO file, bypassing the stub.
7000 This is the "Stay in DWO Optimization": When there is no DWP file and we're
7001 using .gdb_index, then when reading a CU we want to stay in the DWO file
7002 containing that CU. Otherwise we could end up reading several other DWO
7003 files (due to comdat folding) to process the transitive closure of all the
7004 mentioned TUs, and that can be slow. The current DWO file will have every
7005 type signature that it needs.
7006 We only do this for .gdb_index because in the psymtab case we already have
7007 to read all the DWOs to build the type unit groups. */
7009 static struct signatured_type
*
7010 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7012 struct dwarf2_per_objfile
*dwarf2_per_objfile
7013 = cu
->per_cu
->dwarf2_per_objfile
;
7014 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7015 struct dwo_file
*dwo_file
;
7016 struct dwo_unit find_dwo_entry
, *dwo_entry
;
7017 struct signatured_type find_sig_entry
, *sig_entry
;
7020 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7022 /* If TU skeletons have been removed then we may not have read in any
7024 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7026 dwarf2_per_objfile
->signatured_types
7027 = allocate_signatured_type_table (objfile
);
7030 /* We only ever need to read in one copy of a signatured type.
7031 Use the global signatured_types array to do our own comdat-folding
7032 of types. If this is the first time we're reading this TU, and
7033 the TU has an entry in .gdb_index, replace the recorded data from
7034 .gdb_index with this TU. */
7036 find_sig_entry
.signature
= sig
;
7037 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7038 &find_sig_entry
, INSERT
);
7039 sig_entry
= (struct signatured_type
*) *slot
;
7041 /* We can get here with the TU already read, *or* in the process of being
7042 read. Don't reassign the global entry to point to this DWO if that's
7043 the case. Also note that if the TU is already being read, it may not
7044 have come from a DWO, the program may be a mix of Fission-compiled
7045 code and non-Fission-compiled code. */
7047 /* Have we already tried to read this TU?
7048 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7049 needn't exist in the global table yet). */
7050 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
7053 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7054 dwo_unit of the TU itself. */
7055 dwo_file
= cu
->dwo_unit
->dwo_file
;
7057 /* Ok, this is the first time we're reading this TU. */
7058 if (dwo_file
->tus
== NULL
)
7060 find_dwo_entry
.signature
= sig
;
7061 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7062 if (dwo_entry
== NULL
)
7065 /* If the global table doesn't have an entry for this TU, add one. */
7066 if (sig_entry
== NULL
)
7067 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7069 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7070 sig_entry
->per_cu
.tu_read
= 1;
7074 /* Subroutine of lookup_signatured_type.
7075 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7076 then try the DWP file. If the TU stub (skeleton) has been removed then
7077 it won't be in .gdb_index. */
7079 static struct signatured_type
*
7080 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7082 struct dwarf2_per_objfile
*dwarf2_per_objfile
7083 = cu
->per_cu
->dwarf2_per_objfile
;
7084 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7085 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7086 struct dwo_unit
*dwo_entry
;
7087 struct signatured_type find_sig_entry
, *sig_entry
;
7090 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7091 gdb_assert (dwp_file
!= NULL
);
7093 /* If TU skeletons have been removed then we may not have read in any
7095 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7097 dwarf2_per_objfile
->signatured_types
7098 = allocate_signatured_type_table (objfile
);
7101 find_sig_entry
.signature
= sig
;
7102 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7103 &find_sig_entry
, INSERT
);
7104 sig_entry
= (struct signatured_type
*) *slot
;
7106 /* Have we already tried to read this TU?
7107 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7108 needn't exist in the global table yet). */
7109 if (sig_entry
!= NULL
)
7112 if (dwp_file
->tus
== NULL
)
7114 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7115 sig
, 1 /* is_debug_types */);
7116 if (dwo_entry
== NULL
)
7119 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7120 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7125 /* Lookup a signature based type for DW_FORM_ref_sig8.
7126 Returns NULL if signature SIG is not present in the table.
7127 It is up to the caller to complain about this. */
7129 static struct signatured_type
*
7130 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7132 struct dwarf2_per_objfile
*dwarf2_per_objfile
7133 = cu
->per_cu
->dwarf2_per_objfile
;
7136 && dwarf2_per_objfile
->using_index
)
7138 /* We're in a DWO/DWP file, and we're using .gdb_index.
7139 These cases require special processing. */
7140 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7141 return lookup_dwo_signatured_type (cu
, sig
);
7143 return lookup_dwp_signatured_type (cu
, sig
);
7147 struct signatured_type find_entry
, *entry
;
7149 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7151 find_entry
.signature
= sig
;
7152 entry
= ((struct signatured_type
*)
7153 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7158 /* Low level DIE reading support. */
7160 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7163 init_cu_die_reader (struct die_reader_specs
*reader
,
7164 struct dwarf2_cu
*cu
,
7165 struct dwarf2_section_info
*section
,
7166 struct dwo_file
*dwo_file
,
7167 struct abbrev_table
*abbrev_table
)
7169 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7170 reader
->abfd
= get_section_bfd_owner (section
);
7172 reader
->dwo_file
= dwo_file
;
7173 reader
->die_section
= section
;
7174 reader
->buffer
= section
->buffer
;
7175 reader
->buffer_end
= section
->buffer
+ section
->size
;
7176 reader
->comp_dir
= NULL
;
7177 reader
->abbrev_table
= abbrev_table
;
7180 /* Subroutine of init_cutu_and_read_dies to simplify it.
7181 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7182 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7185 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7186 from it to the DIE in the DWO. If NULL we are skipping the stub.
7187 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7188 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7189 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7190 STUB_COMP_DIR may be non-NULL.
7191 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7192 are filled in with the info of the DIE from the DWO file.
7193 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7194 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7195 kept around for at least as long as *RESULT_READER.
7197 The result is non-zero if a valid (non-dummy) DIE was found. */
7200 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7201 struct dwo_unit
*dwo_unit
,
7202 struct die_info
*stub_comp_unit_die
,
7203 const char *stub_comp_dir
,
7204 struct die_reader_specs
*result_reader
,
7205 const gdb_byte
**result_info_ptr
,
7206 struct die_info
**result_comp_unit_die
,
7207 int *result_has_children
,
7208 abbrev_table_up
*result_dwo_abbrev_table
)
7210 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7211 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7212 struct dwarf2_cu
*cu
= this_cu
->cu
;
7214 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7215 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7216 int i
,num_extra_attrs
;
7217 struct dwarf2_section_info
*dwo_abbrev_section
;
7218 struct attribute
*attr
;
7219 struct die_info
*comp_unit_die
;
7221 /* At most one of these may be provided. */
7222 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7224 /* These attributes aren't processed until later:
7225 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7226 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7227 referenced later. However, these attributes are found in the stub
7228 which we won't have later. In order to not impose this complication
7229 on the rest of the code, we read them here and copy them to the
7238 if (stub_comp_unit_die
!= NULL
)
7240 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7242 if (! this_cu
->is_debug_types
)
7243 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7244 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7245 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7246 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7247 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7249 /* There should be a DW_AT_addr_base attribute here (if needed).
7250 We need the value before we can process DW_FORM_GNU_addr_index
7251 or DW_FORM_addrx. */
7253 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7255 cu
->addr_base
= DW_UNSND (attr
);
7257 /* There should be a DW_AT_ranges_base attribute here (if needed).
7258 We need the value before we can process DW_AT_ranges. */
7259 cu
->ranges_base
= 0;
7260 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7262 cu
->ranges_base
= DW_UNSND (attr
);
7264 else if (stub_comp_dir
!= NULL
)
7266 /* Reconstruct the comp_dir attribute to simplify the code below. */
7267 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7268 comp_dir
->name
= DW_AT_comp_dir
;
7269 comp_dir
->form
= DW_FORM_string
;
7270 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7271 DW_STRING (comp_dir
) = stub_comp_dir
;
7274 /* Set up for reading the DWO CU/TU. */
7275 cu
->dwo_unit
= dwo_unit
;
7276 dwarf2_section_info
*section
= dwo_unit
->section
;
7277 dwarf2_read_section (objfile
, section
);
7278 abfd
= get_section_bfd_owner (section
);
7279 begin_info_ptr
= info_ptr
= (section
->buffer
7280 + to_underlying (dwo_unit
->sect_off
));
7281 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7283 if (this_cu
->is_debug_types
)
7285 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7287 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7288 &cu
->header
, section
,
7290 info_ptr
, rcuh_kind::TYPE
);
7291 /* This is not an assert because it can be caused by bad debug info. */
7292 if (sig_type
->signature
!= cu
->header
.signature
)
7294 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7295 " TU at offset %s [in module %s]"),
7296 hex_string (sig_type
->signature
),
7297 hex_string (cu
->header
.signature
),
7298 sect_offset_str (dwo_unit
->sect_off
),
7299 bfd_get_filename (abfd
));
7301 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7302 /* For DWOs coming from DWP files, we don't know the CU length
7303 nor the type's offset in the TU until now. */
7304 dwo_unit
->length
= get_cu_length (&cu
->header
);
7305 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7307 /* Establish the type offset that can be used to lookup the type.
7308 For DWO files, we don't know it until now. */
7309 sig_type
->type_offset_in_section
7310 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7314 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7315 &cu
->header
, section
,
7317 info_ptr
, rcuh_kind::COMPILE
);
7318 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7319 /* For DWOs coming from DWP files, we don't know the CU length
7321 dwo_unit
->length
= get_cu_length (&cu
->header
);
7324 *result_dwo_abbrev_table
7325 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7326 cu
->header
.abbrev_sect_off
);
7327 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7328 result_dwo_abbrev_table
->get ());
7330 /* Read in the die, but leave space to copy over the attributes
7331 from the stub. This has the benefit of simplifying the rest of
7332 the code - all the work to maintain the illusion of a single
7333 DW_TAG_{compile,type}_unit DIE is done here. */
7334 num_extra_attrs
= ((stmt_list
!= NULL
)
7338 + (comp_dir
!= NULL
));
7339 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7340 result_has_children
, num_extra_attrs
);
7342 /* Copy over the attributes from the stub to the DIE we just read in. */
7343 comp_unit_die
= *result_comp_unit_die
;
7344 i
= comp_unit_die
->num_attrs
;
7345 if (stmt_list
!= NULL
)
7346 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7348 comp_unit_die
->attrs
[i
++] = *low_pc
;
7349 if (high_pc
!= NULL
)
7350 comp_unit_die
->attrs
[i
++] = *high_pc
;
7352 comp_unit_die
->attrs
[i
++] = *ranges
;
7353 if (comp_dir
!= NULL
)
7354 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7355 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7357 if (dwarf_die_debug
)
7359 fprintf_unfiltered (gdb_stdlog
,
7360 "Read die from %s@0x%x of %s:\n",
7361 get_section_name (section
),
7362 (unsigned) (begin_info_ptr
- section
->buffer
),
7363 bfd_get_filename (abfd
));
7364 dump_die (comp_unit_die
, dwarf_die_debug
);
7367 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7368 TUs by skipping the stub and going directly to the entry in the DWO file.
7369 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7370 to get it via circuitous means. Blech. */
7371 if (comp_dir
!= NULL
)
7372 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7374 /* Skip dummy compilation units. */
7375 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7376 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7379 *result_info_ptr
= info_ptr
;
7383 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
7384 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
7385 signature is part of the header. */
7386 static gdb::optional
<ULONGEST
>
7387 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
7389 if (cu
->header
.version
>= 5)
7390 return cu
->header
.signature
;
7391 struct attribute
*attr
;
7392 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7393 if (attr
== nullptr)
7394 return gdb::optional
<ULONGEST
> ();
7395 return DW_UNSND (attr
);
7398 /* Subroutine of init_cutu_and_read_dies to simplify it.
7399 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7400 Returns NULL if the specified DWO unit cannot be found. */
7402 static struct dwo_unit
*
7403 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7404 struct die_info
*comp_unit_die
)
7406 struct dwarf2_cu
*cu
= this_cu
->cu
;
7407 struct dwo_unit
*dwo_unit
;
7408 const char *comp_dir
, *dwo_name
;
7410 gdb_assert (cu
!= NULL
);
7412 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7413 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7414 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7416 if (this_cu
->is_debug_types
)
7418 struct signatured_type
*sig_type
;
7420 /* Since this_cu is the first member of struct signatured_type,
7421 we can go from a pointer to one to a pointer to the other. */
7422 sig_type
= (struct signatured_type
*) this_cu
;
7423 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7427 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7428 if (!signature
.has_value ())
7429 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7431 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7432 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7439 /* Subroutine of init_cutu_and_read_dies to simplify it.
7440 See it for a description of the parameters.
7441 Read a TU directly from a DWO file, bypassing the stub. */
7444 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7445 int use_existing_cu
, int keep
,
7446 die_reader_func_ftype
*die_reader_func
,
7449 std::unique_ptr
<dwarf2_cu
> new_cu
;
7450 struct signatured_type
*sig_type
;
7451 struct die_reader_specs reader
;
7452 const gdb_byte
*info_ptr
;
7453 struct die_info
*comp_unit_die
;
7455 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7457 /* Verify we can do the following downcast, and that we have the
7459 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7460 sig_type
= (struct signatured_type
*) this_cu
;
7461 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7463 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7465 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7466 /* There's no need to do the rereading_dwo_cu handling that
7467 init_cutu_and_read_dies does since we don't read the stub. */
7471 /* If !use_existing_cu, this_cu->cu must be NULL. */
7472 gdb_assert (this_cu
->cu
== NULL
);
7473 new_cu
.reset (new dwarf2_cu (this_cu
));
7476 /* A future optimization, if needed, would be to use an existing
7477 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7478 could share abbrev tables. */
7480 /* The abbreviation table used by READER, this must live at least as long as
7482 abbrev_table_up dwo_abbrev_table
;
7484 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7485 NULL
/* stub_comp_unit_die */,
7486 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7488 &comp_unit_die
, &has_children
,
7489 &dwo_abbrev_table
) == 0)
7495 /* All the "real" work is done here. */
7496 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7498 /* This duplicates the code in init_cutu_and_read_dies,
7499 but the alternative is making the latter more complex.
7500 This function is only for the special case of using DWO files directly:
7501 no point in overly complicating the general case just to handle this. */
7502 if (new_cu
!= NULL
&& keep
)
7504 /* Link this CU into read_in_chain. */
7505 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7506 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7507 /* The chain owns it now. */
7512 /* Initialize a CU (or TU) and read its DIEs.
7513 If the CU defers to a DWO file, read the DWO file as well.
7515 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7516 Otherwise the table specified in the comp unit header is read in and used.
7517 This is an optimization for when we already have the abbrev table.
7519 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7520 Otherwise, a new CU is allocated with xmalloc.
7522 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7523 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7525 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7526 linker) then DIE_READER_FUNC will not get called. */
7529 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7530 struct abbrev_table
*abbrev_table
,
7531 int use_existing_cu
, int keep
,
7533 die_reader_func_ftype
*die_reader_func
,
7536 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7537 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7538 struct dwarf2_section_info
*section
= this_cu
->section
;
7539 bfd
*abfd
= get_section_bfd_owner (section
);
7540 struct dwarf2_cu
*cu
;
7541 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7542 struct die_reader_specs reader
;
7543 struct die_info
*comp_unit_die
;
7545 struct signatured_type
*sig_type
= NULL
;
7546 struct dwarf2_section_info
*abbrev_section
;
7547 /* Non-zero if CU currently points to a DWO file and we need to
7548 reread it. When this happens we need to reread the skeleton die
7549 before we can reread the DWO file (this only applies to CUs, not TUs). */
7550 int rereading_dwo_cu
= 0;
7552 if (dwarf_die_debug
)
7553 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7554 this_cu
->is_debug_types
? "type" : "comp",
7555 sect_offset_str (this_cu
->sect_off
));
7557 if (use_existing_cu
)
7560 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7561 file (instead of going through the stub), short-circuit all of this. */
7562 if (this_cu
->reading_dwo_directly
)
7564 /* Narrow down the scope of possibilities to have to understand. */
7565 gdb_assert (this_cu
->is_debug_types
);
7566 gdb_assert (abbrev_table
== NULL
);
7567 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7568 die_reader_func
, data
);
7572 /* This is cheap if the section is already read in. */
7573 dwarf2_read_section (objfile
, section
);
7575 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7577 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7579 std::unique_ptr
<dwarf2_cu
> new_cu
;
7580 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7583 /* If this CU is from a DWO file we need to start over, we need to
7584 refetch the attributes from the skeleton CU.
7585 This could be optimized by retrieving those attributes from when we
7586 were here the first time: the previous comp_unit_die was stored in
7587 comp_unit_obstack. But there's no data yet that we need this
7589 if (cu
->dwo_unit
!= NULL
)
7590 rereading_dwo_cu
= 1;
7594 /* If !use_existing_cu, this_cu->cu must be NULL. */
7595 gdb_assert (this_cu
->cu
== NULL
);
7596 new_cu
.reset (new dwarf2_cu (this_cu
));
7600 /* Get the header. */
7601 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7603 /* We already have the header, there's no need to read it in again. */
7604 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7608 if (this_cu
->is_debug_types
)
7610 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7611 &cu
->header
, section
,
7612 abbrev_section
, info_ptr
,
7615 /* Since per_cu is the first member of struct signatured_type,
7616 we can go from a pointer to one to a pointer to the other. */
7617 sig_type
= (struct signatured_type
*) this_cu
;
7618 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7619 gdb_assert (sig_type
->type_offset_in_tu
7620 == cu
->header
.type_cu_offset_in_tu
);
7621 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7623 /* LENGTH has not been set yet for type units if we're
7624 using .gdb_index. */
7625 this_cu
->length
= get_cu_length (&cu
->header
);
7627 /* Establish the type offset that can be used to lookup the type. */
7628 sig_type
->type_offset_in_section
=
7629 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7631 this_cu
->dwarf_version
= cu
->header
.version
;
7635 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7636 &cu
->header
, section
,
7639 rcuh_kind::COMPILE
);
7641 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7642 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7643 this_cu
->dwarf_version
= cu
->header
.version
;
7647 /* Skip dummy compilation units. */
7648 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7649 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7652 /* If we don't have them yet, read the abbrevs for this compilation unit.
7653 And if we need to read them now, make sure they're freed when we're
7654 done (own the table through ABBREV_TABLE_HOLDER). */
7655 abbrev_table_up abbrev_table_holder
;
7656 if (abbrev_table
!= NULL
)
7657 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7661 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7662 cu
->header
.abbrev_sect_off
);
7663 abbrev_table
= abbrev_table_holder
.get ();
7666 /* Read the top level CU/TU die. */
7667 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7668 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7670 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7673 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7674 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7675 table from the DWO file and pass the ownership over to us. It will be
7676 referenced from READER, so we must make sure to free it after we're done
7679 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7680 DWO CU, that this test will fail (the attribute will not be present). */
7681 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7682 abbrev_table_up dwo_abbrev_table
;
7683 if (dwo_name
!= nullptr)
7685 struct dwo_unit
*dwo_unit
;
7686 struct die_info
*dwo_comp_unit_die
;
7690 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7691 " has children (offset %s) [in module %s]"),
7692 sect_offset_str (this_cu
->sect_off
),
7693 bfd_get_filename (abfd
));
7695 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7696 if (dwo_unit
!= NULL
)
7698 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7699 comp_unit_die
, NULL
,
7701 &dwo_comp_unit_die
, &has_children
,
7702 &dwo_abbrev_table
) == 0)
7707 comp_unit_die
= dwo_comp_unit_die
;
7711 /* Yikes, we couldn't find the rest of the DIE, we only have
7712 the stub. A complaint has already been logged. There's
7713 not much more we can do except pass on the stub DIE to
7714 die_reader_func. We don't want to throw an error on bad
7719 /* All of the above is setup for this call. Yikes. */
7720 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7722 /* Done, clean up. */
7723 if (new_cu
!= NULL
&& keep
)
7725 /* Link this CU into read_in_chain. */
7726 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7727 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7728 /* The chain owns it now. */
7733 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7734 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7735 to have already done the lookup to find the DWO file).
7737 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7738 THIS_CU->is_debug_types, but nothing else.
7740 We fill in THIS_CU->length.
7742 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7743 linker) then DIE_READER_FUNC will not get called.
7745 THIS_CU->cu is always freed when done.
7746 This is done in order to not leave THIS_CU->cu in a state where we have
7747 to care whether it refers to the "main" CU or the DWO CU. */
7750 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7751 struct dwo_file
*dwo_file
,
7752 die_reader_func_ftype
*die_reader_func
,
7755 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7756 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7757 struct dwarf2_section_info
*section
= this_cu
->section
;
7758 bfd
*abfd
= get_section_bfd_owner (section
);
7759 struct dwarf2_section_info
*abbrev_section
;
7760 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7761 struct die_reader_specs reader
;
7762 struct die_info
*comp_unit_die
;
7765 if (dwarf_die_debug
)
7766 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7767 this_cu
->is_debug_types
? "type" : "comp",
7768 sect_offset_str (this_cu
->sect_off
));
7770 gdb_assert (this_cu
->cu
== NULL
);
7772 abbrev_section
= (dwo_file
!= NULL
7773 ? &dwo_file
->sections
.abbrev
7774 : get_abbrev_section_for_cu (this_cu
));
7776 /* This is cheap if the section is already read in. */
7777 dwarf2_read_section (objfile
, section
);
7779 struct dwarf2_cu
cu (this_cu
);
7781 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7782 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7783 &cu
.header
, section
,
7784 abbrev_section
, info_ptr
,
7785 (this_cu
->is_debug_types
7787 : rcuh_kind::COMPILE
));
7789 this_cu
->length
= get_cu_length (&cu
.header
);
7791 /* Skip dummy compilation units. */
7792 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7793 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7796 abbrev_table_up abbrev_table
7797 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7798 cu
.header
.abbrev_sect_off
);
7800 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7801 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7803 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7806 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7807 does not lookup the specified DWO file.
7808 This cannot be used to read DWO files.
7810 THIS_CU->cu is always freed when done.
7811 This is done in order to not leave THIS_CU->cu in a state where we have
7812 to care whether it refers to the "main" CU or the DWO CU.
7813 We can revisit this if the data shows there's a performance issue. */
7816 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7817 die_reader_func_ftype
*die_reader_func
,
7820 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7823 /* Type Unit Groups.
7825 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7826 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7827 so that all types coming from the same compilation (.o file) are grouped
7828 together. A future step could be to put the types in the same symtab as
7829 the CU the types ultimately came from. */
7832 hash_type_unit_group (const void *item
)
7834 const struct type_unit_group
*tu_group
7835 = (const struct type_unit_group
*) item
;
7837 return hash_stmt_list_entry (&tu_group
->hash
);
7841 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7843 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7844 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7846 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7849 /* Allocate a hash table for type unit groups. */
7852 allocate_type_unit_groups_table (struct objfile
*objfile
)
7854 return htab_create_alloc_ex (3,
7855 hash_type_unit_group
,
7858 &objfile
->objfile_obstack
,
7859 hashtab_obstack_allocate
,
7860 dummy_obstack_deallocate
);
7863 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7864 partial symtabs. We combine several TUs per psymtab to not let the size
7865 of any one psymtab grow too big. */
7866 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7867 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7869 /* Helper routine for get_type_unit_group.
7870 Create the type_unit_group object used to hold one or more TUs. */
7872 static struct type_unit_group
*
7873 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7875 struct dwarf2_per_objfile
*dwarf2_per_objfile
7876 = cu
->per_cu
->dwarf2_per_objfile
;
7877 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7878 struct dwarf2_per_cu_data
*per_cu
;
7879 struct type_unit_group
*tu_group
;
7881 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7882 struct type_unit_group
);
7883 per_cu
= &tu_group
->per_cu
;
7884 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7886 if (dwarf2_per_objfile
->using_index
)
7888 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7889 struct dwarf2_per_cu_quick_data
);
7893 unsigned int line_offset
= to_underlying (line_offset_struct
);
7894 struct partial_symtab
*pst
;
7897 /* Give the symtab a useful name for debug purposes. */
7898 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7899 name
= string_printf ("<type_units_%d>",
7900 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7902 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7904 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7908 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7909 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7914 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7915 STMT_LIST is a DW_AT_stmt_list attribute. */
7917 static struct type_unit_group
*
7918 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7920 struct dwarf2_per_objfile
*dwarf2_per_objfile
7921 = cu
->per_cu
->dwarf2_per_objfile
;
7922 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7923 struct type_unit_group
*tu_group
;
7925 unsigned int line_offset
;
7926 struct type_unit_group type_unit_group_for_lookup
;
7928 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7930 dwarf2_per_objfile
->type_unit_groups
=
7931 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7934 /* Do we need to create a new group, or can we use an existing one? */
7938 line_offset
= DW_UNSND (stmt_list
);
7939 ++tu_stats
->nr_symtab_sharers
;
7943 /* Ugh, no stmt_list. Rare, but we have to handle it.
7944 We can do various things here like create one group per TU or
7945 spread them over multiple groups to split up the expansion work.
7946 To avoid worst case scenarios (too many groups or too large groups)
7947 we, umm, group them in bunches. */
7948 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7949 | (tu_stats
->nr_stmt_less_type_units
7950 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7951 ++tu_stats
->nr_stmt_less_type_units
;
7954 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7955 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7956 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7957 &type_unit_group_for_lookup
, INSERT
);
7960 tu_group
= (struct type_unit_group
*) *slot
;
7961 gdb_assert (tu_group
!= NULL
);
7965 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7966 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7968 ++tu_stats
->nr_symtabs
;
7974 /* Partial symbol tables. */
7976 /* Create a psymtab named NAME and assign it to PER_CU.
7978 The caller must fill in the following details:
7979 dirname, textlow, texthigh. */
7981 static struct partial_symtab
*
7982 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7984 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7985 struct partial_symtab
*pst
;
7987 pst
= start_psymtab_common (objfile
, name
, 0);
7989 pst
->psymtabs_addrmap_supported
= 1;
7991 /* This is the glue that links PST into GDB's symbol API. */
7992 pst
->read_symtab_private
= per_cu
;
7993 pst
->read_symtab
= dwarf2_read_symtab
;
7994 per_cu
->v
.psymtab
= pst
;
7999 /* The DATA object passed to process_psymtab_comp_unit_reader has this
8002 struct process_psymtab_comp_unit_data
8004 /* True if we are reading a DW_TAG_partial_unit. */
8006 int want_partial_unit
;
8008 /* The "pretend" language that is used if the CU doesn't declare a
8011 enum language pretend_language
;
8014 /* die_reader_func for process_psymtab_comp_unit. */
8017 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
8018 const gdb_byte
*info_ptr
,
8019 struct die_info
*comp_unit_die
,
8023 struct dwarf2_cu
*cu
= reader
->cu
;
8024 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8025 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8026 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8028 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
8029 struct partial_symtab
*pst
;
8030 enum pc_bounds_kind cu_bounds_kind
;
8031 const char *filename
;
8032 struct process_psymtab_comp_unit_data
*info
8033 = (struct process_psymtab_comp_unit_data
*) data
;
8035 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
8038 gdb_assert (! per_cu
->is_debug_types
);
8040 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
8042 /* Allocate a new partial symbol table structure. */
8043 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
8044 if (filename
== NULL
)
8047 pst
= create_partial_symtab (per_cu
, filename
);
8049 /* This must be done before calling dwarf2_build_include_psymtabs. */
8050 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
8052 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8054 dwarf2_find_base_address (comp_unit_die
, cu
);
8056 /* Possibly set the default values of LOWPC and HIGHPC from
8058 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
8059 &best_highpc
, cu
, pst
);
8060 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8063 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
8066 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
8068 /* Store the contiguous range if it is not empty; it can be
8069 empty for CUs with no code. */
8070 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8074 /* Check if comp unit has_children.
8075 If so, read the rest of the partial symbols from this comp unit.
8076 If not, there's no more debug_info for this comp unit. */
8079 struct partial_die_info
*first_die
;
8080 CORE_ADDR lowpc
, highpc
;
8082 lowpc
= ((CORE_ADDR
) -1);
8083 highpc
= ((CORE_ADDR
) 0);
8085 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8087 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8088 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8090 /* If we didn't find a lowpc, set it to highpc to avoid
8091 complaints from `maint check'. */
8092 if (lowpc
== ((CORE_ADDR
) -1))
8095 /* If the compilation unit didn't have an explicit address range,
8096 then use the information extracted from its child dies. */
8097 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8100 best_highpc
= highpc
;
8103 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
8104 best_lowpc
+ baseaddr
)
8106 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
8107 best_highpc
+ baseaddr
)
8110 end_psymtab_common (objfile
, pst
);
8112 if (!cu
->per_cu
->imported_symtabs_empty ())
8115 int len
= cu
->per_cu
->imported_symtabs_size ();
8117 /* Fill in 'dependencies' here; we fill in 'users' in a
8119 pst
->number_of_dependencies
= len
;
8121 = objfile
->partial_symtabs
->allocate_dependencies (len
);
8122 for (i
= 0; i
< len
; ++i
)
8124 pst
->dependencies
[i
]
8125 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
8128 cu
->per_cu
->imported_symtabs_free ();
8131 /* Get the list of files included in the current compilation unit,
8132 and build a psymtab for each of them. */
8133 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8135 if (dwarf_read_debug
)
8136 fprintf_unfiltered (gdb_stdlog
,
8137 "Psymtab for %s unit @%s: %s - %s"
8138 ", %d global, %d static syms\n",
8139 per_cu
->is_debug_types
? "type" : "comp",
8140 sect_offset_str (per_cu
->sect_off
),
8141 paddress (gdbarch
, pst
->text_low (objfile
)),
8142 paddress (gdbarch
, pst
->text_high (objfile
)),
8143 pst
->n_global_syms
, pst
->n_static_syms
);
8146 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8147 Process compilation unit THIS_CU for a psymtab. */
8150 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8151 int want_partial_unit
,
8152 enum language pretend_language
)
8154 /* If this compilation unit was already read in, free the
8155 cached copy in order to read it in again. This is
8156 necessary because we skipped some symbols when we first
8157 read in the compilation unit (see load_partial_dies).
8158 This problem could be avoided, but the benefit is unclear. */
8159 if (this_cu
->cu
!= NULL
)
8160 free_one_cached_comp_unit (this_cu
);
8162 if (this_cu
->is_debug_types
)
8163 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8164 build_type_psymtabs_reader
, NULL
);
8167 process_psymtab_comp_unit_data info
;
8168 info
.want_partial_unit
= want_partial_unit
;
8169 info
.pretend_language
= pretend_language
;
8170 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8171 process_psymtab_comp_unit_reader
, &info
);
8174 /* Age out any secondary CUs. */
8175 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8178 /* Reader function for build_type_psymtabs. */
8181 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8182 const gdb_byte
*info_ptr
,
8183 struct die_info
*type_unit_die
,
8187 struct dwarf2_per_objfile
*dwarf2_per_objfile
8188 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8189 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8190 struct dwarf2_cu
*cu
= reader
->cu
;
8191 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8192 struct signatured_type
*sig_type
;
8193 struct type_unit_group
*tu_group
;
8194 struct attribute
*attr
;
8195 struct partial_die_info
*first_die
;
8196 CORE_ADDR lowpc
, highpc
;
8197 struct partial_symtab
*pst
;
8199 gdb_assert (data
== NULL
);
8200 gdb_assert (per_cu
->is_debug_types
);
8201 sig_type
= (struct signatured_type
*) per_cu
;
8206 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8207 tu_group
= get_type_unit_group (cu
, attr
);
8209 if (tu_group
->tus
== nullptr)
8210 tu_group
->tus
= new std::vector
<signatured_type
*>;
8211 tu_group
->tus
->push_back (sig_type
);
8213 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8214 pst
= create_partial_symtab (per_cu
, "");
8217 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8219 lowpc
= (CORE_ADDR
) -1;
8220 highpc
= (CORE_ADDR
) 0;
8221 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8223 end_psymtab_common (objfile
, pst
);
8226 /* Struct used to sort TUs by their abbreviation table offset. */
8228 struct tu_abbrev_offset
8230 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8231 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8234 signatured_type
*sig_type
;
8235 sect_offset abbrev_offset
;
8238 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8241 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8242 const struct tu_abbrev_offset
&b
)
8244 return a
.abbrev_offset
< b
.abbrev_offset
;
8247 /* Efficiently read all the type units.
8248 This does the bulk of the work for build_type_psymtabs.
8250 The efficiency is because we sort TUs by the abbrev table they use and
8251 only read each abbrev table once. In one program there are 200K TUs
8252 sharing 8K abbrev tables.
8254 The main purpose of this function is to support building the
8255 dwarf2_per_objfile->type_unit_groups table.
8256 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8257 can collapse the search space by grouping them by stmt_list.
8258 The savings can be significant, in the same program from above the 200K TUs
8259 share 8K stmt_list tables.
8261 FUNC is expected to call get_type_unit_group, which will create the
8262 struct type_unit_group if necessary and add it to
8263 dwarf2_per_objfile->type_unit_groups. */
8266 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8268 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8269 abbrev_table_up abbrev_table
;
8270 sect_offset abbrev_offset
;
8272 /* It's up to the caller to not call us multiple times. */
8273 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8275 if (dwarf2_per_objfile
->all_type_units
.empty ())
8278 /* TUs typically share abbrev tables, and there can be way more TUs than
8279 abbrev tables. Sort by abbrev table to reduce the number of times we
8280 read each abbrev table in.
8281 Alternatives are to punt or to maintain a cache of abbrev tables.
8282 This is simpler and efficient enough for now.
8284 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8285 symtab to use). Typically TUs with the same abbrev offset have the same
8286 stmt_list value too so in practice this should work well.
8288 The basic algorithm here is:
8290 sort TUs by abbrev table
8291 for each TU with same abbrev table:
8292 read abbrev table if first user
8293 read TU top level DIE
8294 [IWBN if DWO skeletons had DW_AT_stmt_list]
8297 if (dwarf_read_debug
)
8298 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8300 /* Sort in a separate table to maintain the order of all_type_units
8301 for .gdb_index: TU indices directly index all_type_units. */
8302 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8303 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8305 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8306 sorted_by_abbrev
.emplace_back
8307 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8308 sig_type
->per_cu
.section
,
8309 sig_type
->per_cu
.sect_off
));
8311 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8312 sort_tu_by_abbrev_offset
);
8314 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8316 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8318 /* Switch to the next abbrev table if necessary. */
8319 if (abbrev_table
== NULL
8320 || tu
.abbrev_offset
!= abbrev_offset
)
8322 abbrev_offset
= tu
.abbrev_offset
;
8324 abbrev_table_read_table (dwarf2_per_objfile
,
8325 &dwarf2_per_objfile
->abbrev
,
8327 ++tu_stats
->nr_uniq_abbrev_tables
;
8330 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8331 0, 0, false, build_type_psymtabs_reader
, NULL
);
8335 /* Print collected type unit statistics. */
8338 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8340 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8342 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8343 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8344 dwarf2_per_objfile
->all_type_units
.size ());
8345 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8346 tu_stats
->nr_uniq_abbrev_tables
);
8347 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8348 tu_stats
->nr_symtabs
);
8349 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8350 tu_stats
->nr_symtab_sharers
);
8351 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8352 tu_stats
->nr_stmt_less_type_units
);
8353 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8354 tu_stats
->nr_all_type_units_reallocs
);
8357 /* Traversal function for build_type_psymtabs. */
8360 build_type_psymtab_dependencies (void **slot
, void *info
)
8362 struct dwarf2_per_objfile
*dwarf2_per_objfile
8363 = (struct dwarf2_per_objfile
*) info
;
8364 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8365 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8366 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8367 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8368 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
8371 gdb_assert (len
> 0);
8372 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8374 pst
->number_of_dependencies
= len
;
8375 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8376 for (i
= 0; i
< len
; ++i
)
8378 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
8379 gdb_assert (iter
->per_cu
.is_debug_types
);
8380 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8381 iter
->type_unit_group
= tu_group
;
8384 delete tu_group
->tus
;
8385 tu_group
->tus
= nullptr;
8390 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8391 Build partial symbol tables for the .debug_types comp-units. */
8394 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8396 if (! create_all_type_units (dwarf2_per_objfile
))
8399 build_type_psymtabs_1 (dwarf2_per_objfile
);
8402 /* Traversal function for process_skeletonless_type_unit.
8403 Read a TU in a DWO file and build partial symbols for it. */
8406 process_skeletonless_type_unit (void **slot
, void *info
)
8408 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8409 struct dwarf2_per_objfile
*dwarf2_per_objfile
8410 = (struct dwarf2_per_objfile
*) info
;
8411 struct signatured_type find_entry
, *entry
;
8413 /* If this TU doesn't exist in the global table, add it and read it in. */
8415 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8417 dwarf2_per_objfile
->signatured_types
8418 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8421 find_entry
.signature
= dwo_unit
->signature
;
8422 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8424 /* If we've already seen this type there's nothing to do. What's happening
8425 is we're doing our own version of comdat-folding here. */
8429 /* This does the job that create_all_type_units would have done for
8431 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8432 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8435 /* This does the job that build_type_psymtabs_1 would have done. */
8436 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8437 build_type_psymtabs_reader
, NULL
);
8442 /* Traversal function for process_skeletonless_type_units. */
8445 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8447 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8449 if (dwo_file
->tus
!= NULL
)
8451 htab_traverse_noresize (dwo_file
->tus
,
8452 process_skeletonless_type_unit
, info
);
8458 /* Scan all TUs of DWO files, verifying we've processed them.
8459 This is needed in case a TU was emitted without its skeleton.
8460 Note: This can't be done until we know what all the DWO files are. */
8463 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8465 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8466 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8467 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8469 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
8470 process_dwo_file_for_skeletonless_type_units
,
8471 dwarf2_per_objfile
);
8475 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8478 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8480 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8482 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8487 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8489 /* Set the 'user' field only if it is not already set. */
8490 if (pst
->dependencies
[j
]->user
== NULL
)
8491 pst
->dependencies
[j
]->user
= pst
;
8496 /* Build the partial symbol table by doing a quick pass through the
8497 .debug_info and .debug_abbrev sections. */
8500 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8502 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8504 if (dwarf_read_debug
)
8506 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8507 objfile_name (objfile
));
8510 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8512 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8514 /* Any cached compilation units will be linked by the per-objfile
8515 read_in_chain. Make sure to free them when we're done. */
8516 free_cached_comp_units
freer (dwarf2_per_objfile
);
8518 build_type_psymtabs (dwarf2_per_objfile
);
8520 create_all_comp_units (dwarf2_per_objfile
);
8522 /* Create a temporary address map on a temporary obstack. We later
8523 copy this to the final obstack. */
8524 auto_obstack temp_obstack
;
8526 scoped_restore save_psymtabs_addrmap
8527 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8528 addrmap_create_mutable (&temp_obstack
));
8530 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8531 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8533 /* This has to wait until we read the CUs, we need the list of DWOs. */
8534 process_skeletonless_type_units (dwarf2_per_objfile
);
8536 /* Now that all TUs have been processed we can fill in the dependencies. */
8537 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8539 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8540 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8543 if (dwarf_read_debug
)
8544 print_tu_stats (dwarf2_per_objfile
);
8546 set_partial_user (dwarf2_per_objfile
);
8548 objfile
->partial_symtabs
->psymtabs_addrmap
8549 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8550 objfile
->partial_symtabs
->obstack ());
8551 /* At this point we want to keep the address map. */
8552 save_psymtabs_addrmap
.release ();
8554 if (dwarf_read_debug
)
8555 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8556 objfile_name (objfile
));
8559 /* die_reader_func for load_partial_comp_unit. */
8562 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8563 const gdb_byte
*info_ptr
,
8564 struct die_info
*comp_unit_die
,
8568 struct dwarf2_cu
*cu
= reader
->cu
;
8570 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8572 /* Check if comp unit has_children.
8573 If so, read the rest of the partial symbols from this comp unit.
8574 If not, there's no more debug_info for this comp unit. */
8576 load_partial_dies (reader
, info_ptr
, 0);
8579 /* Load the partial DIEs for a secondary CU into memory.
8580 This is also used when rereading a primary CU with load_all_dies. */
8583 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8585 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8586 load_partial_comp_unit_reader
, NULL
);
8590 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8591 struct dwarf2_section_info
*section
,
8592 struct dwarf2_section_info
*abbrev_section
,
8593 unsigned int is_dwz
)
8595 const gdb_byte
*info_ptr
;
8596 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8598 if (dwarf_read_debug
)
8599 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8600 get_section_name (section
),
8601 get_section_file_name (section
));
8603 dwarf2_read_section (objfile
, section
);
8605 info_ptr
= section
->buffer
;
8607 while (info_ptr
< section
->buffer
+ section
->size
)
8609 struct dwarf2_per_cu_data
*this_cu
;
8611 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8613 comp_unit_head cu_header
;
8614 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8615 abbrev_section
, info_ptr
,
8616 rcuh_kind::COMPILE
);
8618 /* Save the compilation unit for later lookup. */
8619 if (cu_header
.unit_type
!= DW_UT_type
)
8621 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8622 struct dwarf2_per_cu_data
);
8623 memset (this_cu
, 0, sizeof (*this_cu
));
8627 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8628 struct signatured_type
);
8629 memset (sig_type
, 0, sizeof (*sig_type
));
8630 sig_type
->signature
= cu_header
.signature
;
8631 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8632 this_cu
= &sig_type
->per_cu
;
8634 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8635 this_cu
->sect_off
= sect_off
;
8636 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8637 this_cu
->is_dwz
= is_dwz
;
8638 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8639 this_cu
->section
= section
;
8641 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8643 info_ptr
= info_ptr
+ this_cu
->length
;
8647 /* Create a list of all compilation units in OBJFILE.
8648 This is only done for -readnow and building partial symtabs. */
8651 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8653 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8654 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8655 &dwarf2_per_objfile
->abbrev
, 0);
8657 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8659 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8663 /* Process all loaded DIEs for compilation unit CU, starting at
8664 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8665 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8666 DW_AT_ranges). See the comments of add_partial_subprogram on how
8667 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8670 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8671 CORE_ADDR
*highpc
, int set_addrmap
,
8672 struct dwarf2_cu
*cu
)
8674 struct partial_die_info
*pdi
;
8676 /* Now, march along the PDI's, descending into ones which have
8677 interesting children but skipping the children of the other ones,
8678 until we reach the end of the compilation unit. */
8686 /* Anonymous namespaces or modules have no name but have interesting
8687 children, so we need to look at them. Ditto for anonymous
8690 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8691 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8692 || pdi
->tag
== DW_TAG_imported_unit
8693 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8697 case DW_TAG_subprogram
:
8698 case DW_TAG_inlined_subroutine
:
8699 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8701 case DW_TAG_constant
:
8702 case DW_TAG_variable
:
8703 case DW_TAG_typedef
:
8704 case DW_TAG_union_type
:
8705 if (!pdi
->is_declaration
)
8707 add_partial_symbol (pdi
, cu
);
8710 case DW_TAG_class_type
:
8711 case DW_TAG_interface_type
:
8712 case DW_TAG_structure_type
:
8713 if (!pdi
->is_declaration
)
8715 add_partial_symbol (pdi
, cu
);
8717 if ((cu
->language
== language_rust
8718 || cu
->language
== language_cplus
) && pdi
->has_children
)
8719 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8722 case DW_TAG_enumeration_type
:
8723 if (!pdi
->is_declaration
)
8724 add_partial_enumeration (pdi
, cu
);
8726 case DW_TAG_base_type
:
8727 case DW_TAG_subrange_type
:
8728 /* File scope base type definitions are added to the partial
8730 add_partial_symbol (pdi
, cu
);
8732 case DW_TAG_namespace
:
8733 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8736 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8738 case DW_TAG_imported_unit
:
8740 struct dwarf2_per_cu_data
*per_cu
;
8742 /* For now we don't handle imported units in type units. */
8743 if (cu
->per_cu
->is_debug_types
)
8745 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8746 " supported in type units [in module %s]"),
8747 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8750 per_cu
= dwarf2_find_containing_comp_unit
8751 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8752 cu
->per_cu
->dwarf2_per_objfile
);
8754 /* Go read the partial unit, if needed. */
8755 if (per_cu
->v
.psymtab
== NULL
)
8756 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8758 cu
->per_cu
->imported_symtabs_push (per_cu
);
8761 case DW_TAG_imported_declaration
:
8762 add_partial_symbol (pdi
, cu
);
8769 /* If the die has a sibling, skip to the sibling. */
8771 pdi
= pdi
->die_sibling
;
8775 /* Functions used to compute the fully scoped name of a partial DIE.
8777 Normally, this is simple. For C++, the parent DIE's fully scoped
8778 name is concatenated with "::" and the partial DIE's name.
8779 Enumerators are an exception; they use the scope of their parent
8780 enumeration type, i.e. the name of the enumeration type is not
8781 prepended to the enumerator.
8783 There are two complexities. One is DW_AT_specification; in this
8784 case "parent" means the parent of the target of the specification,
8785 instead of the direct parent of the DIE. The other is compilers
8786 which do not emit DW_TAG_namespace; in this case we try to guess
8787 the fully qualified name of structure types from their members'
8788 linkage names. This must be done using the DIE's children rather
8789 than the children of any DW_AT_specification target. We only need
8790 to do this for structures at the top level, i.e. if the target of
8791 any DW_AT_specification (if any; otherwise the DIE itself) does not
8794 /* Compute the scope prefix associated with PDI's parent, in
8795 compilation unit CU. The result will be allocated on CU's
8796 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8797 field. NULL is returned if no prefix is necessary. */
8799 partial_die_parent_scope (struct partial_die_info
*pdi
,
8800 struct dwarf2_cu
*cu
)
8802 const char *grandparent_scope
;
8803 struct partial_die_info
*parent
, *real_pdi
;
8805 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8806 then this means the parent of the specification DIE. */
8809 while (real_pdi
->has_specification
)
8811 auto res
= find_partial_die (real_pdi
->spec_offset
,
8812 real_pdi
->spec_is_dwz
, cu
);
8817 parent
= real_pdi
->die_parent
;
8821 if (parent
->scope_set
)
8822 return parent
->scope
;
8826 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8828 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8829 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8830 Work around this problem here. */
8831 if (cu
->language
== language_cplus
8832 && parent
->tag
== DW_TAG_namespace
8833 && strcmp (parent
->name
, "::") == 0
8834 && grandparent_scope
== NULL
)
8836 parent
->scope
= NULL
;
8837 parent
->scope_set
= 1;
8841 /* Nested subroutines in Fortran get a prefix. */
8842 if (pdi
->tag
== DW_TAG_enumerator
)
8843 /* Enumerators should not get the name of the enumeration as a prefix. */
8844 parent
->scope
= grandparent_scope
;
8845 else if (parent
->tag
== DW_TAG_namespace
8846 || parent
->tag
== DW_TAG_module
8847 || parent
->tag
== DW_TAG_structure_type
8848 || parent
->tag
== DW_TAG_class_type
8849 || parent
->tag
== DW_TAG_interface_type
8850 || parent
->tag
== DW_TAG_union_type
8851 || parent
->tag
== DW_TAG_enumeration_type
8852 || (cu
->language
== language_fortran
8853 && parent
->tag
== DW_TAG_subprogram
8854 && pdi
->tag
== DW_TAG_subprogram
))
8856 if (grandparent_scope
== NULL
)
8857 parent
->scope
= parent
->name
;
8859 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8861 parent
->name
, 0, cu
);
8865 /* FIXME drow/2004-04-01: What should we be doing with
8866 function-local names? For partial symbols, we should probably be
8868 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8869 dwarf_tag_name (parent
->tag
),
8870 sect_offset_str (pdi
->sect_off
));
8871 parent
->scope
= grandparent_scope
;
8874 parent
->scope_set
= 1;
8875 return parent
->scope
;
8878 /* Return the fully scoped name associated with PDI, from compilation unit
8879 CU. The result will be allocated with malloc. */
8882 partial_die_full_name (struct partial_die_info
*pdi
,
8883 struct dwarf2_cu
*cu
)
8885 const char *parent_scope
;
8887 /* If this is a template instantiation, we can not work out the
8888 template arguments from partial DIEs. So, unfortunately, we have
8889 to go through the full DIEs. At least any work we do building
8890 types here will be reused if full symbols are loaded later. */
8891 if (pdi
->has_template_arguments
)
8895 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8897 struct die_info
*die
;
8898 struct attribute attr
;
8899 struct dwarf2_cu
*ref_cu
= cu
;
8901 /* DW_FORM_ref_addr is using section offset. */
8902 attr
.name
= (enum dwarf_attribute
) 0;
8903 attr
.form
= DW_FORM_ref_addr
;
8904 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8905 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8907 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8911 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8912 if (parent_scope
== NULL
)
8915 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8919 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8921 struct dwarf2_per_objfile
*dwarf2_per_objfile
8922 = cu
->per_cu
->dwarf2_per_objfile
;
8923 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8924 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8926 const char *actual_name
= NULL
;
8928 char *built_actual_name
;
8930 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8932 built_actual_name
= partial_die_full_name (pdi
, cu
);
8933 if (built_actual_name
!= NULL
)
8934 actual_name
= built_actual_name
;
8936 if (actual_name
== NULL
)
8937 actual_name
= pdi
->name
;
8941 case DW_TAG_inlined_subroutine
:
8942 case DW_TAG_subprogram
:
8943 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8945 if (pdi
->is_external
8946 || cu
->language
== language_ada
8947 || (cu
->language
== language_fortran
8948 && pdi
->die_parent
!= NULL
8949 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8951 /* Normally, only "external" DIEs are part of the global scope.
8952 But in Ada and Fortran, we want to be able to access nested
8953 procedures globally. So all Ada and Fortran subprograms are
8954 stored in the global scope. */
8955 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8956 built_actual_name
!= NULL
,
8957 VAR_DOMAIN
, LOC_BLOCK
,
8958 SECT_OFF_TEXT (objfile
),
8959 psymbol_placement::GLOBAL
,
8961 cu
->language
, objfile
);
8965 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8966 built_actual_name
!= NULL
,
8967 VAR_DOMAIN
, LOC_BLOCK
,
8968 SECT_OFF_TEXT (objfile
),
8969 psymbol_placement::STATIC
,
8970 addr
, cu
->language
, objfile
);
8973 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8974 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8976 case DW_TAG_constant
:
8977 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8978 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8979 -1, (pdi
->is_external
8980 ? psymbol_placement::GLOBAL
8981 : psymbol_placement::STATIC
),
8982 0, cu
->language
, objfile
);
8984 case DW_TAG_variable
:
8986 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8990 && !dwarf2_per_objfile
->has_section_at_zero
)
8992 /* A global or static variable may also have been stripped
8993 out by the linker if unused, in which case its address
8994 will be nullified; do not add such variables into partial
8995 symbol table then. */
8997 else if (pdi
->is_external
)
9000 Don't enter into the minimal symbol tables as there is
9001 a minimal symbol table entry from the ELF symbols already.
9002 Enter into partial symbol table if it has a location
9003 descriptor or a type.
9004 If the location descriptor is missing, new_symbol will create
9005 a LOC_UNRESOLVED symbol, the address of the variable will then
9006 be determined from the minimal symbol table whenever the variable
9008 The address for the partial symbol table entry is not
9009 used by GDB, but it comes in handy for debugging partial symbol
9012 if (pdi
->d
.locdesc
|| pdi
->has_type
)
9013 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9014 built_actual_name
!= NULL
,
9015 VAR_DOMAIN
, LOC_STATIC
,
9016 SECT_OFF_TEXT (objfile
),
9017 psymbol_placement::GLOBAL
,
9018 addr
, cu
->language
, objfile
);
9022 int has_loc
= pdi
->d
.locdesc
!= NULL
;
9024 /* Static Variable. Skip symbols whose value we cannot know (those
9025 without location descriptors or constant values). */
9026 if (!has_loc
&& !pdi
->has_const_value
)
9028 xfree (built_actual_name
);
9032 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9033 built_actual_name
!= NULL
,
9034 VAR_DOMAIN
, LOC_STATIC
,
9035 SECT_OFF_TEXT (objfile
),
9036 psymbol_placement::STATIC
,
9038 cu
->language
, objfile
);
9041 case DW_TAG_typedef
:
9042 case DW_TAG_base_type
:
9043 case DW_TAG_subrange_type
:
9044 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9045 built_actual_name
!= NULL
,
9046 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9047 psymbol_placement::STATIC
,
9048 0, cu
->language
, objfile
);
9050 case DW_TAG_imported_declaration
:
9051 case DW_TAG_namespace
:
9052 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9053 built_actual_name
!= NULL
,
9054 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9055 psymbol_placement::GLOBAL
,
9056 0, cu
->language
, objfile
);
9059 /* With Fortran 77 there might be a "BLOCK DATA" module
9060 available without any name. If so, we skip the module as it
9061 doesn't bring any value. */
9062 if (actual_name
!= nullptr)
9063 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9064 built_actual_name
!= NULL
,
9065 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
9066 psymbol_placement::GLOBAL
,
9067 0, cu
->language
, objfile
);
9069 case DW_TAG_class_type
:
9070 case DW_TAG_interface_type
:
9071 case DW_TAG_structure_type
:
9072 case DW_TAG_union_type
:
9073 case DW_TAG_enumeration_type
:
9074 /* Skip external references. The DWARF standard says in the section
9075 about "Structure, Union, and Class Type Entries": "An incomplete
9076 structure, union or class type is represented by a structure,
9077 union or class entry that does not have a byte size attribute
9078 and that has a DW_AT_declaration attribute." */
9079 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9081 xfree (built_actual_name
);
9085 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9086 static vs. global. */
9087 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9088 built_actual_name
!= NULL
,
9089 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
9090 cu
->language
== language_cplus
9091 ? psymbol_placement::GLOBAL
9092 : psymbol_placement::STATIC
,
9093 0, cu
->language
, objfile
);
9096 case DW_TAG_enumerator
:
9097 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9098 built_actual_name
!= NULL
,
9099 VAR_DOMAIN
, LOC_CONST
, -1,
9100 cu
->language
== language_cplus
9101 ? psymbol_placement::GLOBAL
9102 : psymbol_placement::STATIC
,
9103 0, cu
->language
, objfile
);
9109 xfree (built_actual_name
);
9112 /* Read a partial die corresponding to a namespace; also, add a symbol
9113 corresponding to that namespace to the symbol table. NAMESPACE is
9114 the name of the enclosing namespace. */
9117 add_partial_namespace (struct partial_die_info
*pdi
,
9118 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9119 int set_addrmap
, struct dwarf2_cu
*cu
)
9121 /* Add a symbol for the namespace. */
9123 add_partial_symbol (pdi
, cu
);
9125 /* Now scan partial symbols in that namespace. */
9127 if (pdi
->has_children
)
9128 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9131 /* Read a partial die corresponding to a Fortran module. */
9134 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9135 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9137 /* Add a symbol for the namespace. */
9139 add_partial_symbol (pdi
, cu
);
9141 /* Now scan partial symbols in that module. */
9143 if (pdi
->has_children
)
9144 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9147 /* Read a partial die corresponding to a subprogram or an inlined
9148 subprogram and create a partial symbol for that subprogram.
9149 When the CU language allows it, this routine also defines a partial
9150 symbol for each nested subprogram that this subprogram contains.
9151 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9152 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9154 PDI may also be a lexical block, in which case we simply search
9155 recursively for subprograms defined inside that lexical block.
9156 Again, this is only performed when the CU language allows this
9157 type of definitions. */
9160 add_partial_subprogram (struct partial_die_info
*pdi
,
9161 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9162 int set_addrmap
, struct dwarf2_cu
*cu
)
9164 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9166 if (pdi
->has_pc_info
)
9168 if (pdi
->lowpc
< *lowpc
)
9169 *lowpc
= pdi
->lowpc
;
9170 if (pdi
->highpc
> *highpc
)
9171 *highpc
= pdi
->highpc
;
9174 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9175 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9177 CORE_ADDR this_highpc
;
9178 CORE_ADDR this_lowpc
;
9180 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9181 SECT_OFF_TEXT (objfile
));
9183 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9184 pdi
->lowpc
+ baseaddr
)
9187 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9188 pdi
->highpc
+ baseaddr
)
9190 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
9191 this_lowpc
, this_highpc
- 1,
9192 cu
->per_cu
->v
.psymtab
);
9196 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9198 if (!pdi
->is_declaration
)
9199 /* Ignore subprogram DIEs that do not have a name, they are
9200 illegal. Do not emit a complaint at this point, we will
9201 do so when we convert this psymtab into a symtab. */
9203 add_partial_symbol (pdi
, cu
);
9207 if (! pdi
->has_children
)
9210 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
9212 pdi
= pdi
->die_child
;
9216 if (pdi
->tag
== DW_TAG_subprogram
9217 || pdi
->tag
== DW_TAG_inlined_subroutine
9218 || pdi
->tag
== DW_TAG_lexical_block
)
9219 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9220 pdi
= pdi
->die_sibling
;
9225 /* Read a partial die corresponding to an enumeration type. */
9228 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9229 struct dwarf2_cu
*cu
)
9231 struct partial_die_info
*pdi
;
9233 if (enum_pdi
->name
!= NULL
)
9234 add_partial_symbol (enum_pdi
, cu
);
9236 pdi
= enum_pdi
->die_child
;
9239 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9240 complaint (_("malformed enumerator DIE ignored"));
9242 add_partial_symbol (pdi
, cu
);
9243 pdi
= pdi
->die_sibling
;
9247 /* Return the initial uleb128 in the die at INFO_PTR. */
9250 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9252 unsigned int bytes_read
;
9254 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9257 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9258 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9260 Return the corresponding abbrev, or NULL if the number is zero (indicating
9261 an empty DIE). In either case *BYTES_READ will be set to the length of
9262 the initial number. */
9264 static struct abbrev_info
*
9265 peek_die_abbrev (const die_reader_specs
&reader
,
9266 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9268 dwarf2_cu
*cu
= reader
.cu
;
9269 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9270 unsigned int abbrev_number
9271 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9273 if (abbrev_number
== 0)
9276 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9279 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9280 " at offset %s [in module %s]"),
9281 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9282 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9288 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9289 Returns a pointer to the end of a series of DIEs, terminated by an empty
9290 DIE. Any children of the skipped DIEs will also be skipped. */
9292 static const gdb_byte
*
9293 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9297 unsigned int bytes_read
;
9298 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9301 return info_ptr
+ bytes_read
;
9303 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9307 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9308 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9309 abbrev corresponding to that skipped uleb128 should be passed in
9310 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9313 static const gdb_byte
*
9314 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9315 struct abbrev_info
*abbrev
)
9317 unsigned int bytes_read
;
9318 struct attribute attr
;
9319 bfd
*abfd
= reader
->abfd
;
9320 struct dwarf2_cu
*cu
= reader
->cu
;
9321 const gdb_byte
*buffer
= reader
->buffer
;
9322 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9323 unsigned int form
, i
;
9325 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9327 /* The only abbrev we care about is DW_AT_sibling. */
9328 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9330 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9331 if (attr
.form
== DW_FORM_ref_addr
)
9332 complaint (_("ignoring absolute DW_AT_sibling"));
9335 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9336 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9338 if (sibling_ptr
< info_ptr
)
9339 complaint (_("DW_AT_sibling points backwards"));
9340 else if (sibling_ptr
> reader
->buffer_end
)
9341 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9347 /* If it isn't DW_AT_sibling, skip this attribute. */
9348 form
= abbrev
->attrs
[i
].form
;
9352 case DW_FORM_ref_addr
:
9353 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9354 and later it is offset sized. */
9355 if (cu
->header
.version
== 2)
9356 info_ptr
+= cu
->header
.addr_size
;
9358 info_ptr
+= cu
->header
.offset_size
;
9360 case DW_FORM_GNU_ref_alt
:
9361 info_ptr
+= cu
->header
.offset_size
;
9364 info_ptr
+= cu
->header
.addr_size
;
9372 case DW_FORM_flag_present
:
9373 case DW_FORM_implicit_const
:
9390 case DW_FORM_ref_sig8
:
9393 case DW_FORM_data16
:
9396 case DW_FORM_string
:
9397 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9398 info_ptr
+= bytes_read
;
9400 case DW_FORM_sec_offset
:
9402 case DW_FORM_GNU_strp_alt
:
9403 info_ptr
+= cu
->header
.offset_size
;
9405 case DW_FORM_exprloc
:
9407 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9408 info_ptr
+= bytes_read
;
9410 case DW_FORM_block1
:
9411 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9413 case DW_FORM_block2
:
9414 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9416 case DW_FORM_block4
:
9417 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9423 case DW_FORM_ref_udata
:
9424 case DW_FORM_GNU_addr_index
:
9425 case DW_FORM_GNU_str_index
:
9426 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9428 case DW_FORM_indirect
:
9429 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9430 info_ptr
+= bytes_read
;
9431 /* We need to continue parsing from here, so just go back to
9433 goto skip_attribute
;
9436 error (_("Dwarf Error: Cannot handle %s "
9437 "in DWARF reader [in module %s]"),
9438 dwarf_form_name (form
),
9439 bfd_get_filename (abfd
));
9443 if (abbrev
->has_children
)
9444 return skip_children (reader
, info_ptr
);
9449 /* Locate ORIG_PDI's sibling.
9450 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9452 static const gdb_byte
*
9453 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9454 struct partial_die_info
*orig_pdi
,
9455 const gdb_byte
*info_ptr
)
9457 /* Do we know the sibling already? */
9459 if (orig_pdi
->sibling
)
9460 return orig_pdi
->sibling
;
9462 /* Are there any children to deal with? */
9464 if (!orig_pdi
->has_children
)
9467 /* Skip the children the long way. */
9469 return skip_children (reader
, info_ptr
);
9472 /* Expand this partial symbol table into a full symbol table. SELF is
9476 dwarf2_read_symtab (struct partial_symtab
*self
,
9477 struct objfile
*objfile
)
9479 struct dwarf2_per_objfile
*dwarf2_per_objfile
9480 = get_dwarf2_per_objfile (objfile
);
9484 warning (_("bug: psymtab for %s is already read in."),
9491 printf_filtered (_("Reading in symbols for %s..."),
9493 gdb_flush (gdb_stdout
);
9496 /* If this psymtab is constructed from a debug-only objfile, the
9497 has_section_at_zero flag will not necessarily be correct. We
9498 can get the correct value for this flag by looking at the data
9499 associated with the (presumably stripped) associated objfile. */
9500 if (objfile
->separate_debug_objfile_backlink
)
9502 struct dwarf2_per_objfile
*dpo_backlink
9503 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9505 dwarf2_per_objfile
->has_section_at_zero
9506 = dpo_backlink
->has_section_at_zero
;
9509 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9511 psymtab_to_symtab_1 (self
);
9513 /* Finish up the debug error message. */
9515 printf_filtered (_("done.\n"));
9518 process_cu_includes (dwarf2_per_objfile
);
9521 /* Reading in full CUs. */
9523 /* Add PER_CU to the queue. */
9526 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9527 enum language pretend_language
)
9529 struct dwarf2_queue_item
*item
;
9532 item
= XNEW (struct dwarf2_queue_item
);
9533 item
->per_cu
= per_cu
;
9534 item
->pretend_language
= pretend_language
;
9537 if (dwarf2_queue
== NULL
)
9538 dwarf2_queue
= item
;
9540 dwarf2_queue_tail
->next
= item
;
9542 dwarf2_queue_tail
= item
;
9545 /* If PER_CU is not yet queued, add it to the queue.
9546 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9548 The result is non-zero if PER_CU was queued, otherwise the result is zero
9549 meaning either PER_CU is already queued or it is already loaded.
9551 N.B. There is an invariant here that if a CU is queued then it is loaded.
9552 The caller is required to load PER_CU if we return non-zero. */
9555 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9556 struct dwarf2_per_cu_data
*per_cu
,
9557 enum language pretend_language
)
9559 /* We may arrive here during partial symbol reading, if we need full
9560 DIEs to process an unusual case (e.g. template arguments). Do
9561 not queue PER_CU, just tell our caller to load its DIEs. */
9562 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9564 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9569 /* Mark the dependence relation so that we don't flush PER_CU
9571 if (dependent_cu
!= NULL
)
9572 dwarf2_add_dependence (dependent_cu
, per_cu
);
9574 /* If it's already on the queue, we have nothing to do. */
9578 /* If the compilation unit is already loaded, just mark it as
9580 if (per_cu
->cu
!= NULL
)
9582 per_cu
->cu
->last_used
= 0;
9586 /* Add it to the queue. */
9587 queue_comp_unit (per_cu
, pretend_language
);
9592 /* Process the queue. */
9595 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9597 struct dwarf2_queue_item
*item
, *next_item
;
9599 if (dwarf_read_debug
)
9601 fprintf_unfiltered (gdb_stdlog
,
9602 "Expanding one or more symtabs of objfile %s ...\n",
9603 objfile_name (dwarf2_per_objfile
->objfile
));
9606 /* The queue starts out with one item, but following a DIE reference
9607 may load a new CU, adding it to the end of the queue. */
9608 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9610 if ((dwarf2_per_objfile
->using_index
9611 ? !item
->per_cu
->v
.quick
->compunit_symtab
9612 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9613 /* Skip dummy CUs. */
9614 && item
->per_cu
->cu
!= NULL
)
9616 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9617 unsigned int debug_print_threshold
;
9620 if (per_cu
->is_debug_types
)
9622 struct signatured_type
*sig_type
=
9623 (struct signatured_type
*) per_cu
;
9625 sprintf (buf
, "TU %s at offset %s",
9626 hex_string (sig_type
->signature
),
9627 sect_offset_str (per_cu
->sect_off
));
9628 /* There can be 100s of TUs.
9629 Only print them in verbose mode. */
9630 debug_print_threshold
= 2;
9634 sprintf (buf
, "CU at offset %s",
9635 sect_offset_str (per_cu
->sect_off
));
9636 debug_print_threshold
= 1;
9639 if (dwarf_read_debug
>= debug_print_threshold
)
9640 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9642 if (per_cu
->is_debug_types
)
9643 process_full_type_unit (per_cu
, item
->pretend_language
);
9645 process_full_comp_unit (per_cu
, item
->pretend_language
);
9647 if (dwarf_read_debug
>= debug_print_threshold
)
9648 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9651 item
->per_cu
->queued
= 0;
9652 next_item
= item
->next
;
9656 dwarf2_queue_tail
= NULL
;
9658 if (dwarf_read_debug
)
9660 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9661 objfile_name (dwarf2_per_objfile
->objfile
));
9665 /* Read in full symbols for PST, and anything it depends on. */
9668 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9670 struct dwarf2_per_cu_data
*per_cu
;
9676 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9677 if (!pst
->dependencies
[i
]->readin
9678 && pst
->dependencies
[i
]->user
== NULL
)
9680 /* Inform about additional files that need to be read in. */
9683 /* FIXME: i18n: Need to make this a single string. */
9684 fputs_filtered (" ", gdb_stdout
);
9686 fputs_filtered ("and ", gdb_stdout
);
9688 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9689 wrap_here (""); /* Flush output. */
9690 gdb_flush (gdb_stdout
);
9692 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9695 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9699 /* It's an include file, no symbols to read for it.
9700 Everything is in the parent symtab. */
9705 dw2_do_instantiate_symtab (per_cu
, false);
9708 /* Trivial hash function for die_info: the hash value of a DIE
9709 is its offset in .debug_info for this objfile. */
9712 die_hash (const void *item
)
9714 const struct die_info
*die
= (const struct die_info
*) item
;
9716 return to_underlying (die
->sect_off
);
9719 /* Trivial comparison function for die_info structures: two DIEs
9720 are equal if they have the same offset. */
9723 die_eq (const void *item_lhs
, const void *item_rhs
)
9725 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9726 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9728 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9731 /* die_reader_func for load_full_comp_unit.
9732 This is identical to read_signatured_type_reader,
9733 but is kept separate for now. */
9736 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9737 const gdb_byte
*info_ptr
,
9738 struct die_info
*comp_unit_die
,
9742 struct dwarf2_cu
*cu
= reader
->cu
;
9743 enum language
*language_ptr
= (enum language
*) data
;
9745 gdb_assert (cu
->die_hash
== NULL
);
9747 htab_create_alloc_ex (cu
->header
.length
/ 12,
9751 &cu
->comp_unit_obstack
,
9752 hashtab_obstack_allocate
,
9753 dummy_obstack_deallocate
);
9756 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9757 &info_ptr
, comp_unit_die
);
9758 cu
->dies
= comp_unit_die
;
9759 /* comp_unit_die is not stored in die_hash, no need. */
9761 /* We try not to read any attributes in this function, because not
9762 all CUs needed for references have been loaded yet, and symbol
9763 table processing isn't initialized. But we have to set the CU language,
9764 or we won't be able to build types correctly.
9765 Similarly, if we do not read the producer, we can not apply
9766 producer-specific interpretation. */
9767 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9770 /* Load the DIEs associated with PER_CU into memory. */
9773 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9775 enum language pretend_language
)
9777 gdb_assert (! this_cu
->is_debug_types
);
9779 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9780 load_full_comp_unit_reader
, &pretend_language
);
9783 /* Add a DIE to the delayed physname list. */
9786 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9787 const char *name
, struct die_info
*die
,
9788 struct dwarf2_cu
*cu
)
9790 struct delayed_method_info mi
;
9792 mi
.fnfield_index
= fnfield_index
;
9796 cu
->method_list
.push_back (mi
);
9799 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9800 "const" / "volatile". If so, decrements LEN by the length of the
9801 modifier and return true. Otherwise return false. */
9805 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9807 size_t mod_len
= sizeof (mod
) - 1;
9808 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9816 /* Compute the physnames of any methods on the CU's method list.
9818 The computation of method physnames is delayed in order to avoid the
9819 (bad) condition that one of the method's formal parameters is of an as yet
9823 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9825 /* Only C++ delays computing physnames. */
9826 if (cu
->method_list
.empty ())
9828 gdb_assert (cu
->language
== language_cplus
);
9830 for (const delayed_method_info
&mi
: cu
->method_list
)
9832 const char *physname
;
9833 struct fn_fieldlist
*fn_flp
9834 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9835 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9836 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9837 = physname
? physname
: "";
9839 /* Since there's no tag to indicate whether a method is a
9840 const/volatile overload, extract that information out of the
9842 if (physname
!= NULL
)
9844 size_t len
= strlen (physname
);
9848 if (physname
[len
] == ')') /* shortcut */
9850 else if (check_modifier (physname
, len
, " const"))
9851 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9852 else if (check_modifier (physname
, len
, " volatile"))
9853 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9860 /* The list is no longer needed. */
9861 cu
->method_list
.clear ();
9864 /* Go objects should be embedded in a DW_TAG_module DIE,
9865 and it's not clear if/how imported objects will appear.
9866 To keep Go support simple until that's worked out,
9867 go back through what we've read and create something usable.
9868 We could do this while processing each DIE, and feels kinda cleaner,
9869 but that way is more invasive.
9870 This is to, for example, allow the user to type "p var" or "b main"
9871 without having to specify the package name, and allow lookups
9872 of module.object to work in contexts that use the expression
9876 fixup_go_packaging (struct dwarf2_cu
*cu
)
9878 char *package_name
= NULL
;
9879 struct pending
*list
;
9882 for (list
= *cu
->get_builder ()->get_global_symbols ();
9886 for (i
= 0; i
< list
->nsyms
; ++i
)
9888 struct symbol
*sym
= list
->symbol
[i
];
9890 if (SYMBOL_LANGUAGE (sym
) == language_go
9891 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9893 char *this_package_name
= go_symbol_package_name (sym
);
9895 if (this_package_name
== NULL
)
9897 if (package_name
== NULL
)
9898 package_name
= this_package_name
;
9901 struct objfile
*objfile
9902 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9903 if (strcmp (package_name
, this_package_name
) != 0)
9904 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9905 (symbol_symtab (sym
) != NULL
9906 ? symtab_to_filename_for_display
9907 (symbol_symtab (sym
))
9908 : objfile_name (objfile
)),
9909 this_package_name
, package_name
);
9910 xfree (this_package_name
);
9916 if (package_name
!= NULL
)
9918 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9919 const char *saved_package_name
9920 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
, package_name
);
9921 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9922 saved_package_name
);
9925 sym
= allocate_symbol (objfile
);
9926 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9927 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9928 strlen (saved_package_name
), 0, objfile
);
9929 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9930 e.g., "main" finds the "main" module and not C's main(). */
9931 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9932 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9933 SYMBOL_TYPE (sym
) = type
;
9935 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9937 xfree (package_name
);
9941 /* Allocate a fully-qualified name consisting of the two parts on the
9945 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9947 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9950 /* A helper that allocates a struct discriminant_info to attach to a
9953 static struct discriminant_info
*
9954 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9957 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9958 gdb_assert (discriminant_index
== -1
9959 || (discriminant_index
>= 0
9960 && discriminant_index
< TYPE_NFIELDS (type
)));
9961 gdb_assert (default_index
== -1
9962 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9964 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9966 struct discriminant_info
*disc
9967 = ((struct discriminant_info
*)
9969 offsetof (struct discriminant_info
, discriminants
)
9970 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9971 disc
->default_index
= default_index
;
9972 disc
->discriminant_index
= discriminant_index
;
9974 struct dynamic_prop prop
;
9975 prop
.kind
= PROP_UNDEFINED
;
9976 prop
.data
.baton
= disc
;
9978 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9983 /* Some versions of rustc emitted enums in an unusual way.
9985 Ordinary enums were emitted as unions. The first element of each
9986 structure in the union was named "RUST$ENUM$DISR". This element
9987 held the discriminant.
9989 These versions of Rust also implemented the "non-zero"
9990 optimization. When the enum had two values, and one is empty and
9991 the other holds a pointer that cannot be zero, the pointer is used
9992 as the discriminant, with a zero value meaning the empty variant.
9993 Here, the union's first member is of the form
9994 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9995 where the fieldnos are the indices of the fields that should be
9996 traversed in order to find the field (which may be several fields deep)
9997 and the variantname is the name of the variant of the case when the
10000 This function recognizes whether TYPE is of one of these forms,
10001 and, if so, smashes it to be a variant type. */
10004 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
10006 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
10008 /* We don't need to deal with empty enums. */
10009 if (TYPE_NFIELDS (type
) == 0)
10012 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
10013 if (TYPE_NFIELDS (type
) == 1
10014 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
10016 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
10018 /* Decode the field name to find the offset of the
10020 ULONGEST bit_offset
= 0;
10021 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
10022 while (name
[0] >= '0' && name
[0] <= '9')
10025 unsigned long index
= strtoul (name
, &tail
, 10);
10028 || index
>= TYPE_NFIELDS (field_type
)
10029 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
10030 != FIELD_LOC_KIND_BITPOS
))
10032 complaint (_("Could not parse Rust enum encoding string \"%s\""
10034 TYPE_FIELD_NAME (type
, 0),
10035 objfile_name (objfile
));
10040 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
10041 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
10044 /* Make a union to hold the variants. */
10045 struct type
*union_type
= alloc_type (objfile
);
10046 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10047 TYPE_NFIELDS (union_type
) = 3;
10048 TYPE_FIELDS (union_type
)
10049 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
10050 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10051 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10053 /* Put the discriminant must at index 0. */
10054 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
10055 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10056 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10057 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
10059 /* The order of fields doesn't really matter, so put the real
10060 field at index 1 and the data-less field at index 2. */
10061 struct discriminant_info
*disc
10062 = alloc_discriminant_info (union_type
, 0, 1);
10063 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
10064 TYPE_FIELD_NAME (union_type
, 1)
10065 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
10066 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
10067 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10068 TYPE_FIELD_NAME (union_type
, 1));
10070 const char *dataless_name
10071 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10073 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
10075 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
10076 /* NAME points into the original discriminant name, which
10077 already has the correct lifetime. */
10078 TYPE_FIELD_NAME (union_type
, 2) = name
;
10079 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
10080 disc
->discriminants
[2] = 0;
10082 /* Smash this type to be a structure type. We have to do this
10083 because the type has already been recorded. */
10084 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10085 TYPE_NFIELDS (type
) = 1;
10087 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
10089 /* Install the variant part. */
10090 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10091 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10092 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10094 /* A union with a single anonymous field is probably an old-style
10095 univariant enum. */
10096 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
10098 /* Smash this type to be a structure type. We have to do this
10099 because the type has already been recorded. */
10100 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10102 /* Make a union to hold the variants. */
10103 struct type
*union_type
= alloc_type (objfile
);
10104 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10105 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10106 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10107 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10108 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10110 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10111 const char *variant_name
10112 = rust_last_path_segment (TYPE_NAME (field_type
));
10113 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10114 TYPE_NAME (field_type
)
10115 = rust_fully_qualify (&objfile
->objfile_obstack
,
10116 TYPE_NAME (type
), variant_name
);
10118 /* Install the union in the outer struct type. */
10119 TYPE_NFIELDS (type
) = 1;
10121 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10122 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10123 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10124 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10126 alloc_discriminant_info (union_type
, -1, 0);
10130 struct type
*disr_type
= nullptr;
10131 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10133 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10135 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10137 /* All fields of a true enum will be structs. */
10140 else if (TYPE_NFIELDS (disr_type
) == 0)
10142 /* Could be data-less variant, so keep going. */
10143 disr_type
= nullptr;
10145 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10146 "RUST$ENUM$DISR") != 0)
10148 /* Not a Rust enum. */
10158 /* If we got here without a discriminant, then it's probably
10160 if (disr_type
== nullptr)
10163 /* Smash this type to be a structure type. We have to do this
10164 because the type has already been recorded. */
10165 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10167 /* Make a union to hold the variants. */
10168 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10169 struct type
*union_type
= alloc_type (objfile
);
10170 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10171 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10172 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10173 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10174 TYPE_FIELDS (union_type
)
10175 = (struct field
*) TYPE_ZALLOC (union_type
,
10176 (TYPE_NFIELDS (union_type
)
10177 * sizeof (struct field
)));
10179 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10180 TYPE_NFIELDS (type
) * sizeof (struct field
));
10182 /* Install the discriminant at index 0 in the union. */
10183 TYPE_FIELD (union_type
, 0) = *disr_field
;
10184 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10185 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10187 /* Install the union in the outer struct type. */
10188 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10189 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10190 TYPE_NFIELDS (type
) = 1;
10192 /* Set the size and offset of the union type. */
10193 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10195 /* We need a way to find the correct discriminant given a
10196 variant name. For convenience we build a map here. */
10197 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10198 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10199 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10201 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10204 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10205 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10209 int n_fields
= TYPE_NFIELDS (union_type
);
10210 struct discriminant_info
*disc
10211 = alloc_discriminant_info (union_type
, 0, -1);
10212 /* Skip the discriminant here. */
10213 for (int i
= 1; i
< n_fields
; ++i
)
10215 /* Find the final word in the name of this variant's type.
10216 That name can be used to look up the correct
10218 const char *variant_name
10219 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10222 auto iter
= discriminant_map
.find (variant_name
);
10223 if (iter
!= discriminant_map
.end ())
10224 disc
->discriminants
[i
] = iter
->second
;
10226 /* Remove the discriminant field, if it exists. */
10227 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10228 if (TYPE_NFIELDS (sub_type
) > 0)
10230 --TYPE_NFIELDS (sub_type
);
10231 ++TYPE_FIELDS (sub_type
);
10233 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10234 TYPE_NAME (sub_type
)
10235 = rust_fully_qualify (&objfile
->objfile_obstack
,
10236 TYPE_NAME (type
), variant_name
);
10241 /* Rewrite some Rust unions to be structures with variants parts. */
10244 rust_union_quirks (struct dwarf2_cu
*cu
)
10246 gdb_assert (cu
->language
== language_rust
);
10247 for (type
*type_
: cu
->rust_unions
)
10248 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10249 /* We don't need this any more. */
10250 cu
->rust_unions
.clear ();
10253 /* Return the symtab for PER_CU. This works properly regardless of
10254 whether we're using the index or psymtabs. */
10256 static struct compunit_symtab
*
10257 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10259 return (per_cu
->dwarf2_per_objfile
->using_index
10260 ? per_cu
->v
.quick
->compunit_symtab
10261 : per_cu
->v
.psymtab
->compunit_symtab
);
10264 /* A helper function for computing the list of all symbol tables
10265 included by PER_CU. */
10268 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
10269 htab_t all_children
, htab_t all_type_symtabs
,
10270 struct dwarf2_per_cu_data
*per_cu
,
10271 struct compunit_symtab
*immediate_parent
)
10274 struct compunit_symtab
*cust
;
10276 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10279 /* This inclusion and its children have been processed. */
10284 /* Only add a CU if it has a symbol table. */
10285 cust
= get_compunit_symtab (per_cu
);
10288 /* If this is a type unit only add its symbol table if we haven't
10289 seen it yet (type unit per_cu's can share symtabs). */
10290 if (per_cu
->is_debug_types
)
10292 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10296 result
->push_back (cust
);
10297 if (cust
->user
== NULL
)
10298 cust
->user
= immediate_parent
;
10303 result
->push_back (cust
);
10304 if (cust
->user
== NULL
)
10305 cust
->user
= immediate_parent
;
10309 if (!per_cu
->imported_symtabs_empty ())
10310 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
10312 recursively_compute_inclusions (result
, all_children
,
10313 all_type_symtabs
, ptr
, cust
);
10317 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10321 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10323 gdb_assert (! per_cu
->is_debug_types
);
10325 if (!per_cu
->imported_symtabs_empty ())
10328 std::vector
<compunit_symtab
*> result_symtabs
;
10329 htab_t all_children
, all_type_symtabs
;
10330 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10332 /* If we don't have a symtab, we can just skip this case. */
10336 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10337 NULL
, xcalloc
, xfree
);
10338 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10339 NULL
, xcalloc
, xfree
);
10341 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
10343 recursively_compute_inclusions (&result_symtabs
, all_children
,
10344 all_type_symtabs
, ptr
, cust
);
10347 /* Now we have a transitive closure of all the included symtabs. */
10348 len
= result_symtabs
.size ();
10350 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10351 struct compunit_symtab
*, len
+ 1);
10352 memcpy (cust
->includes
, result_symtabs
.data (),
10353 len
* sizeof (compunit_symtab
*));
10354 cust
->includes
[len
] = NULL
;
10356 htab_delete (all_children
);
10357 htab_delete (all_type_symtabs
);
10361 /* Compute the 'includes' field for the symtabs of all the CUs we just
10365 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10367 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10369 if (! iter
->is_debug_types
)
10370 compute_compunit_symtab_includes (iter
);
10373 dwarf2_per_objfile
->just_read_cus
.clear ();
10376 /* Generate full symbol information for PER_CU, whose DIEs have
10377 already been loaded into memory. */
10380 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10381 enum language pretend_language
)
10383 struct dwarf2_cu
*cu
= per_cu
->cu
;
10384 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10385 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10386 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10387 CORE_ADDR lowpc
, highpc
;
10388 struct compunit_symtab
*cust
;
10389 CORE_ADDR baseaddr
;
10390 struct block
*static_block
;
10393 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10395 /* Clear the list here in case something was left over. */
10396 cu
->method_list
.clear ();
10398 cu
->language
= pretend_language
;
10399 cu
->language_defn
= language_def (cu
->language
);
10401 /* Do line number decoding in read_file_scope () */
10402 process_die (cu
->dies
, cu
);
10404 /* For now fudge the Go package. */
10405 if (cu
->language
== language_go
)
10406 fixup_go_packaging (cu
);
10408 /* Now that we have processed all the DIEs in the CU, all the types
10409 should be complete, and it should now be safe to compute all of the
10411 compute_delayed_physnames (cu
);
10413 if (cu
->language
== language_rust
)
10414 rust_union_quirks (cu
);
10416 /* Some compilers don't define a DW_AT_high_pc attribute for the
10417 compilation unit. If the DW_AT_high_pc is missing, synthesize
10418 it, by scanning the DIE's below the compilation unit. */
10419 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10421 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10422 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10424 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10425 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10426 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10427 addrmap to help ensure it has an accurate map of pc values belonging to
10429 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10431 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10432 SECT_OFF_TEXT (objfile
),
10437 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10439 /* Set symtab language to language from DW_AT_language. If the
10440 compilation is from a C file generated by language preprocessors, do
10441 not set the language if it was already deduced by start_subfile. */
10442 if (!(cu
->language
== language_c
10443 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10444 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10446 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10447 produce DW_AT_location with location lists but it can be possibly
10448 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10449 there were bugs in prologue debug info, fixed later in GCC-4.5
10450 by "unwind info for epilogues" patch (which is not directly related).
10452 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10453 needed, it would be wrong due to missing DW_AT_producer there.
10455 Still one can confuse GDB by using non-standard GCC compilation
10456 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10458 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10459 cust
->locations_valid
= 1;
10461 if (gcc_4_minor
>= 5)
10462 cust
->epilogue_unwind_valid
= 1;
10464 cust
->call_site_htab
= cu
->call_site_htab
;
10467 if (dwarf2_per_objfile
->using_index
)
10468 per_cu
->v
.quick
->compunit_symtab
= cust
;
10471 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10472 pst
->compunit_symtab
= cust
;
10476 /* Push it for inclusion processing later. */
10477 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10479 /* Not needed any more. */
10480 cu
->reset_builder ();
10483 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10484 already been loaded into memory. */
10487 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10488 enum language pretend_language
)
10490 struct dwarf2_cu
*cu
= per_cu
->cu
;
10491 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10492 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10493 struct compunit_symtab
*cust
;
10494 struct signatured_type
*sig_type
;
10496 gdb_assert (per_cu
->is_debug_types
);
10497 sig_type
= (struct signatured_type
*) per_cu
;
10499 /* Clear the list here in case something was left over. */
10500 cu
->method_list
.clear ();
10502 cu
->language
= pretend_language
;
10503 cu
->language_defn
= language_def (cu
->language
);
10505 /* The symbol tables are set up in read_type_unit_scope. */
10506 process_die (cu
->dies
, cu
);
10508 /* For now fudge the Go package. */
10509 if (cu
->language
== language_go
)
10510 fixup_go_packaging (cu
);
10512 /* Now that we have processed all the DIEs in the CU, all the types
10513 should be complete, and it should now be safe to compute all of the
10515 compute_delayed_physnames (cu
);
10517 if (cu
->language
== language_rust
)
10518 rust_union_quirks (cu
);
10520 /* TUs share symbol tables.
10521 If this is the first TU to use this symtab, complete the construction
10522 of it with end_expandable_symtab. Otherwise, complete the addition of
10523 this TU's symbols to the existing symtab. */
10524 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10526 buildsym_compunit
*builder
= cu
->get_builder ();
10527 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10528 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10532 /* Set symtab language to language from DW_AT_language. If the
10533 compilation is from a C file generated by language preprocessors,
10534 do not set the language if it was already deduced by
10536 if (!(cu
->language
== language_c
10537 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10538 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10543 cu
->get_builder ()->augment_type_symtab ();
10544 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10547 if (dwarf2_per_objfile
->using_index
)
10548 per_cu
->v
.quick
->compunit_symtab
= cust
;
10551 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10552 pst
->compunit_symtab
= cust
;
10556 /* Not needed any more. */
10557 cu
->reset_builder ();
10560 /* Process an imported unit DIE. */
10563 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10565 struct attribute
*attr
;
10567 /* For now we don't handle imported units in type units. */
10568 if (cu
->per_cu
->is_debug_types
)
10570 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10571 " supported in type units [in module %s]"),
10572 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10575 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10578 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10579 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10580 dwarf2_per_cu_data
*per_cu
10581 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10582 cu
->per_cu
->dwarf2_per_objfile
);
10584 /* If necessary, add it to the queue and load its DIEs. */
10585 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10586 load_full_comp_unit (per_cu
, false, cu
->language
);
10588 cu
->per_cu
->imported_symtabs_push (per_cu
);
10592 /* RAII object that represents a process_die scope: i.e.,
10593 starts/finishes processing a DIE. */
10594 class process_die_scope
10597 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10598 : m_die (die
), m_cu (cu
)
10600 /* We should only be processing DIEs not already in process. */
10601 gdb_assert (!m_die
->in_process
);
10602 m_die
->in_process
= true;
10605 ~process_die_scope ()
10607 m_die
->in_process
= false;
10609 /* If we're done processing the DIE for the CU that owns the line
10610 header, we don't need the line header anymore. */
10611 if (m_cu
->line_header_die_owner
== m_die
)
10613 delete m_cu
->line_header
;
10614 m_cu
->line_header
= NULL
;
10615 m_cu
->line_header_die_owner
= NULL
;
10624 /* Process a die and its children. */
10627 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10629 process_die_scope
scope (die
, cu
);
10633 case DW_TAG_padding
:
10635 case DW_TAG_compile_unit
:
10636 case DW_TAG_partial_unit
:
10637 read_file_scope (die
, cu
);
10639 case DW_TAG_type_unit
:
10640 read_type_unit_scope (die
, cu
);
10642 case DW_TAG_subprogram
:
10643 /* Nested subprograms in Fortran get a prefix. */
10644 if (cu
->language
== language_fortran
10645 && die
->parent
!= NULL
10646 && die
->parent
->tag
== DW_TAG_subprogram
)
10647 cu
->processing_has_namespace_info
= true;
10648 /* Fall through. */
10649 case DW_TAG_inlined_subroutine
:
10650 read_func_scope (die
, cu
);
10652 case DW_TAG_lexical_block
:
10653 case DW_TAG_try_block
:
10654 case DW_TAG_catch_block
:
10655 read_lexical_block_scope (die
, cu
);
10657 case DW_TAG_call_site
:
10658 case DW_TAG_GNU_call_site
:
10659 read_call_site_scope (die
, cu
);
10661 case DW_TAG_class_type
:
10662 case DW_TAG_interface_type
:
10663 case DW_TAG_structure_type
:
10664 case DW_TAG_union_type
:
10665 process_structure_scope (die
, cu
);
10667 case DW_TAG_enumeration_type
:
10668 process_enumeration_scope (die
, cu
);
10671 /* These dies have a type, but processing them does not create
10672 a symbol or recurse to process the children. Therefore we can
10673 read them on-demand through read_type_die. */
10674 case DW_TAG_subroutine_type
:
10675 case DW_TAG_set_type
:
10676 case DW_TAG_array_type
:
10677 case DW_TAG_pointer_type
:
10678 case DW_TAG_ptr_to_member_type
:
10679 case DW_TAG_reference_type
:
10680 case DW_TAG_rvalue_reference_type
:
10681 case DW_TAG_string_type
:
10684 case DW_TAG_base_type
:
10685 case DW_TAG_subrange_type
:
10686 case DW_TAG_typedef
:
10687 /* Add a typedef symbol for the type definition, if it has a
10689 new_symbol (die
, read_type_die (die
, cu
), cu
);
10691 case DW_TAG_common_block
:
10692 read_common_block (die
, cu
);
10694 case DW_TAG_common_inclusion
:
10696 case DW_TAG_namespace
:
10697 cu
->processing_has_namespace_info
= true;
10698 read_namespace (die
, cu
);
10700 case DW_TAG_module
:
10701 cu
->processing_has_namespace_info
= true;
10702 read_module (die
, cu
);
10704 case DW_TAG_imported_declaration
:
10705 cu
->processing_has_namespace_info
= true;
10706 if (read_namespace_alias (die
, cu
))
10708 /* The declaration is not a global namespace alias. */
10709 /* Fall through. */
10710 case DW_TAG_imported_module
:
10711 cu
->processing_has_namespace_info
= true;
10712 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10713 || cu
->language
!= language_fortran
))
10714 complaint (_("Tag '%s' has unexpected children"),
10715 dwarf_tag_name (die
->tag
));
10716 read_import_statement (die
, cu
);
10719 case DW_TAG_imported_unit
:
10720 process_imported_unit_die (die
, cu
);
10723 case DW_TAG_variable
:
10724 read_variable (die
, cu
);
10728 new_symbol (die
, NULL
, cu
);
10733 /* DWARF name computation. */
10735 /* A helper function for dwarf2_compute_name which determines whether DIE
10736 needs to have the name of the scope prepended to the name listed in the
10740 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10742 struct attribute
*attr
;
10746 case DW_TAG_namespace
:
10747 case DW_TAG_typedef
:
10748 case DW_TAG_class_type
:
10749 case DW_TAG_interface_type
:
10750 case DW_TAG_structure_type
:
10751 case DW_TAG_union_type
:
10752 case DW_TAG_enumeration_type
:
10753 case DW_TAG_enumerator
:
10754 case DW_TAG_subprogram
:
10755 case DW_TAG_inlined_subroutine
:
10756 case DW_TAG_member
:
10757 case DW_TAG_imported_declaration
:
10760 case DW_TAG_variable
:
10761 case DW_TAG_constant
:
10762 /* We only need to prefix "globally" visible variables. These include
10763 any variable marked with DW_AT_external or any variable that
10764 lives in a namespace. [Variables in anonymous namespaces
10765 require prefixing, but they are not DW_AT_external.] */
10767 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10769 struct dwarf2_cu
*spec_cu
= cu
;
10771 return die_needs_namespace (die_specification (die
, &spec_cu
),
10775 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10776 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10777 && die
->parent
->tag
!= DW_TAG_module
)
10779 /* A variable in a lexical block of some kind does not need a
10780 namespace, even though in C++ such variables may be external
10781 and have a mangled name. */
10782 if (die
->parent
->tag
== DW_TAG_lexical_block
10783 || die
->parent
->tag
== DW_TAG_try_block
10784 || die
->parent
->tag
== DW_TAG_catch_block
10785 || die
->parent
->tag
== DW_TAG_subprogram
)
10794 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10795 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10796 defined for the given DIE. */
10798 static struct attribute
*
10799 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10801 struct attribute
*attr
;
10803 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10805 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10810 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10811 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10812 defined for the given DIE. */
10814 static const char *
10815 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10817 const char *linkage_name
;
10819 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10820 if (linkage_name
== NULL
)
10821 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10823 return linkage_name
;
10826 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10827 compute the physname for the object, which include a method's:
10828 - formal parameters (C++),
10829 - receiver type (Go),
10831 The term "physname" is a bit confusing.
10832 For C++, for example, it is the demangled name.
10833 For Go, for example, it's the mangled name.
10835 For Ada, return the DIE's linkage name rather than the fully qualified
10836 name. PHYSNAME is ignored..
10838 The result is allocated on the objfile_obstack and canonicalized. */
10840 static const char *
10841 dwarf2_compute_name (const char *name
,
10842 struct die_info
*die
, struct dwarf2_cu
*cu
,
10845 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10848 name
= dwarf2_name (die
, cu
);
10850 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10851 but otherwise compute it by typename_concat inside GDB.
10852 FIXME: Actually this is not really true, or at least not always true.
10853 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10854 Fortran names because there is no mangling standard. So new_symbol
10855 will set the demangled name to the result of dwarf2_full_name, and it is
10856 the demangled name that GDB uses if it exists. */
10857 if (cu
->language
== language_ada
10858 || (cu
->language
== language_fortran
&& physname
))
10860 /* For Ada unit, we prefer the linkage name over the name, as
10861 the former contains the exported name, which the user expects
10862 to be able to reference. Ideally, we want the user to be able
10863 to reference this entity using either natural or linkage name,
10864 but we haven't started looking at this enhancement yet. */
10865 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10867 if (linkage_name
!= NULL
)
10868 return linkage_name
;
10871 /* These are the only languages we know how to qualify names in. */
10873 && (cu
->language
== language_cplus
10874 || cu
->language
== language_fortran
|| cu
->language
== language_d
10875 || cu
->language
== language_rust
))
10877 if (die_needs_namespace (die
, cu
))
10879 const char *prefix
;
10880 const char *canonical_name
= NULL
;
10884 prefix
= determine_prefix (die
, cu
);
10885 if (*prefix
!= '\0')
10887 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10890 buf
.puts (prefixed_name
);
10891 xfree (prefixed_name
);
10896 /* Template parameters may be specified in the DIE's DW_AT_name, or
10897 as children with DW_TAG_template_type_param or
10898 DW_TAG_value_type_param. If the latter, add them to the name
10899 here. If the name already has template parameters, then
10900 skip this step; some versions of GCC emit both, and
10901 it is more efficient to use the pre-computed name.
10903 Something to keep in mind about this process: it is very
10904 unlikely, or in some cases downright impossible, to produce
10905 something that will match the mangled name of a function.
10906 If the definition of the function has the same debug info,
10907 we should be able to match up with it anyway. But fallbacks
10908 using the minimal symbol, for instance to find a method
10909 implemented in a stripped copy of libstdc++, will not work.
10910 If we do not have debug info for the definition, we will have to
10911 match them up some other way.
10913 When we do name matching there is a related problem with function
10914 templates; two instantiated function templates are allowed to
10915 differ only by their return types, which we do not add here. */
10917 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10919 struct attribute
*attr
;
10920 struct die_info
*child
;
10923 die
->building_fullname
= 1;
10925 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10929 const gdb_byte
*bytes
;
10930 struct dwarf2_locexpr_baton
*baton
;
10933 if (child
->tag
!= DW_TAG_template_type_param
10934 && child
->tag
!= DW_TAG_template_value_param
)
10945 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10948 complaint (_("template parameter missing DW_AT_type"));
10949 buf
.puts ("UNKNOWN_TYPE");
10952 type
= die_type (child
, cu
);
10954 if (child
->tag
== DW_TAG_template_type_param
)
10956 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10957 &type_print_raw_options
);
10961 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10964 complaint (_("template parameter missing "
10965 "DW_AT_const_value"));
10966 buf
.puts ("UNKNOWN_VALUE");
10970 dwarf2_const_value_attr (attr
, type
, name
,
10971 &cu
->comp_unit_obstack
, cu
,
10972 &value
, &bytes
, &baton
);
10974 if (TYPE_NOSIGN (type
))
10975 /* GDB prints characters as NUMBER 'CHAR'. If that's
10976 changed, this can use value_print instead. */
10977 c_printchar (value
, type
, &buf
);
10980 struct value_print_options opts
;
10983 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10987 else if (bytes
!= NULL
)
10989 v
= allocate_value (type
);
10990 memcpy (value_contents_writeable (v
), bytes
,
10991 TYPE_LENGTH (type
));
10994 v
= value_from_longest (type
, value
);
10996 /* Specify decimal so that we do not depend on
10998 get_formatted_print_options (&opts
, 'd');
11000 value_print (v
, &buf
, &opts
);
11005 die
->building_fullname
= 0;
11009 /* Close the argument list, with a space if necessary
11010 (nested templates). */
11011 if (!buf
.empty () && buf
.string ().back () == '>')
11018 /* For C++ methods, append formal parameter type
11019 information, if PHYSNAME. */
11021 if (physname
&& die
->tag
== DW_TAG_subprogram
11022 && cu
->language
== language_cplus
)
11024 struct type
*type
= read_type_die (die
, cu
);
11026 c_type_print_args (type
, &buf
, 1, cu
->language
,
11027 &type_print_raw_options
);
11029 if (cu
->language
== language_cplus
)
11031 /* Assume that an artificial first parameter is
11032 "this", but do not crash if it is not. RealView
11033 marks unnamed (and thus unused) parameters as
11034 artificial; there is no way to differentiate
11036 if (TYPE_NFIELDS (type
) > 0
11037 && TYPE_FIELD_ARTIFICIAL (type
, 0)
11038 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
11039 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
11041 buf
.puts (" const");
11045 const std::string
&intermediate_name
= buf
.string ();
11047 if (cu
->language
== language_cplus
)
11049 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
11050 &objfile
->per_bfd
->storage_obstack
);
11052 /* If we only computed INTERMEDIATE_NAME, or if
11053 INTERMEDIATE_NAME is already canonical, then we need to
11054 copy it to the appropriate obstack. */
11055 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11056 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
11057 intermediate_name
);
11059 name
= canonical_name
;
11066 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11067 If scope qualifiers are appropriate they will be added. The result
11068 will be allocated on the storage_obstack, or NULL if the DIE does
11069 not have a name. NAME may either be from a previous call to
11070 dwarf2_name or NULL.
11072 The output string will be canonicalized (if C++). */
11074 static const char *
11075 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11077 return dwarf2_compute_name (name
, die
, cu
, 0);
11080 /* Construct a physname for the given DIE in CU. NAME may either be
11081 from a previous call to dwarf2_name or NULL. The result will be
11082 allocated on the objfile_objstack or NULL if the DIE does not have a
11085 The output string will be canonicalized (if C++). */
11087 static const char *
11088 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11090 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11091 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11094 /* In this case dwarf2_compute_name is just a shortcut not building anything
11096 if (!die_needs_namespace (die
, cu
))
11097 return dwarf2_compute_name (name
, die
, cu
, 1);
11099 mangled
= dw2_linkage_name (die
, cu
);
11101 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11102 See https://github.com/rust-lang/rust/issues/32925. */
11103 if (cu
->language
== language_rust
&& mangled
!= NULL
11104 && strchr (mangled
, '{') != NULL
)
11107 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11109 gdb::unique_xmalloc_ptr
<char> demangled
;
11110 if (mangled
!= NULL
)
11113 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11115 /* Do nothing (do not demangle the symbol name). */
11117 else if (cu
->language
== language_go
)
11119 /* This is a lie, but we already lie to the caller new_symbol.
11120 new_symbol assumes we return the mangled name.
11121 This just undoes that lie until things are cleaned up. */
11125 /* Use DMGL_RET_DROP for C++ template functions to suppress
11126 their return type. It is easier for GDB users to search
11127 for such functions as `name(params)' than `long name(params)'.
11128 In such case the minimal symbol names do not match the full
11129 symbol names but for template functions there is never a need
11130 to look up their definition from their declaration so
11131 the only disadvantage remains the minimal symbol variant
11132 `long name(params)' does not have the proper inferior type. */
11133 demangled
.reset (gdb_demangle (mangled
,
11134 (DMGL_PARAMS
| DMGL_ANSI
11135 | DMGL_RET_DROP
)));
11138 canon
= demangled
.get ();
11146 if (canon
== NULL
|| check_physname
)
11148 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11150 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11152 /* It may not mean a bug in GDB. The compiler could also
11153 compute DW_AT_linkage_name incorrectly. But in such case
11154 GDB would need to be bug-to-bug compatible. */
11156 complaint (_("Computed physname <%s> does not match demangled <%s> "
11157 "(from linkage <%s>) - DIE at %s [in module %s]"),
11158 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11159 objfile_name (objfile
));
11161 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11162 is available here - over computed PHYSNAME. It is safer
11163 against both buggy GDB and buggy compilers. */
11177 retval
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, retval
);
11182 /* Inspect DIE in CU for a namespace alias. If one exists, record
11183 a new symbol for it.
11185 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11188 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11190 struct attribute
*attr
;
11192 /* If the die does not have a name, this is not a namespace
11194 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11198 struct die_info
*d
= die
;
11199 struct dwarf2_cu
*imported_cu
= cu
;
11201 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11202 keep inspecting DIEs until we hit the underlying import. */
11203 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11204 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11206 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11210 d
= follow_die_ref (d
, attr
, &imported_cu
);
11211 if (d
->tag
!= DW_TAG_imported_declaration
)
11215 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11217 complaint (_("DIE at %s has too many recursively imported "
11218 "declarations"), sect_offset_str (d
->sect_off
));
11225 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11227 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11228 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11230 /* This declaration is a global namespace alias. Add
11231 a symbol for it whose type is the aliased namespace. */
11232 new_symbol (die
, type
, cu
);
11241 /* Return the using directives repository (global or local?) to use in the
11242 current context for CU.
11244 For Ada, imported declarations can materialize renamings, which *may* be
11245 global. However it is impossible (for now?) in DWARF to distinguish
11246 "external" imported declarations and "static" ones. As all imported
11247 declarations seem to be static in all other languages, make them all CU-wide
11248 global only in Ada. */
11250 static struct using_direct
**
11251 using_directives (struct dwarf2_cu
*cu
)
11253 if (cu
->language
== language_ada
11254 && cu
->get_builder ()->outermost_context_p ())
11255 return cu
->get_builder ()->get_global_using_directives ();
11257 return cu
->get_builder ()->get_local_using_directives ();
11260 /* Read the import statement specified by the given die and record it. */
11263 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11265 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11266 struct attribute
*import_attr
;
11267 struct die_info
*imported_die
, *child_die
;
11268 struct dwarf2_cu
*imported_cu
;
11269 const char *imported_name
;
11270 const char *imported_name_prefix
;
11271 const char *canonical_name
;
11272 const char *import_alias
;
11273 const char *imported_declaration
= NULL
;
11274 const char *import_prefix
;
11275 std::vector
<const char *> excludes
;
11277 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11278 if (import_attr
== NULL
)
11280 complaint (_("Tag '%s' has no DW_AT_import"),
11281 dwarf_tag_name (die
->tag
));
11286 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11287 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11288 if (imported_name
== NULL
)
11290 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11292 The import in the following code:
11306 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11307 <52> DW_AT_decl_file : 1
11308 <53> DW_AT_decl_line : 6
11309 <54> DW_AT_import : <0x75>
11310 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11311 <59> DW_AT_name : B
11312 <5b> DW_AT_decl_file : 1
11313 <5c> DW_AT_decl_line : 2
11314 <5d> DW_AT_type : <0x6e>
11316 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11317 <76> DW_AT_byte_size : 4
11318 <77> DW_AT_encoding : 5 (signed)
11320 imports the wrong die ( 0x75 instead of 0x58 ).
11321 This case will be ignored until the gcc bug is fixed. */
11325 /* Figure out the local name after import. */
11326 import_alias
= dwarf2_name (die
, cu
);
11328 /* Figure out where the statement is being imported to. */
11329 import_prefix
= determine_prefix (die
, cu
);
11331 /* Figure out what the scope of the imported die is and prepend it
11332 to the name of the imported die. */
11333 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11335 if (imported_die
->tag
!= DW_TAG_namespace
11336 && imported_die
->tag
!= DW_TAG_module
)
11338 imported_declaration
= imported_name
;
11339 canonical_name
= imported_name_prefix
;
11341 else if (strlen (imported_name_prefix
) > 0)
11342 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11343 imported_name_prefix
,
11344 (cu
->language
== language_d
? "." : "::"),
11345 imported_name
, (char *) NULL
);
11347 canonical_name
= imported_name
;
11349 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11350 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11351 child_die
= sibling_die (child_die
))
11353 /* DWARF-4: A Fortran use statement with a “rename list” may be
11354 represented by an imported module entry with an import attribute
11355 referring to the module and owned entries corresponding to those
11356 entities that are renamed as part of being imported. */
11358 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11360 complaint (_("child DW_TAG_imported_declaration expected "
11361 "- DIE at %s [in module %s]"),
11362 sect_offset_str (child_die
->sect_off
),
11363 objfile_name (objfile
));
11367 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11368 if (import_attr
== NULL
)
11370 complaint (_("Tag '%s' has no DW_AT_import"),
11371 dwarf_tag_name (child_die
->tag
));
11376 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11378 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11379 if (imported_name
== NULL
)
11381 complaint (_("child DW_TAG_imported_declaration has unknown "
11382 "imported name - DIE at %s [in module %s]"),
11383 sect_offset_str (child_die
->sect_off
),
11384 objfile_name (objfile
));
11388 excludes
.push_back (imported_name
);
11390 process_die (child_die
, cu
);
11393 add_using_directive (using_directives (cu
),
11397 imported_declaration
,
11400 &objfile
->objfile_obstack
);
11403 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11404 types, but gives them a size of zero. Starting with version 14,
11405 ICC is compatible with GCC. */
11408 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11410 if (!cu
->checked_producer
)
11411 check_producer (cu
);
11413 return cu
->producer_is_icc_lt_14
;
11416 /* ICC generates a DW_AT_type for C void functions. This was observed on
11417 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11418 which says that void functions should not have a DW_AT_type. */
11421 producer_is_icc (struct dwarf2_cu
*cu
)
11423 if (!cu
->checked_producer
)
11424 check_producer (cu
);
11426 return cu
->producer_is_icc
;
11429 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11430 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11431 this, it was first present in GCC release 4.3.0. */
11434 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11436 if (!cu
->checked_producer
)
11437 check_producer (cu
);
11439 return cu
->producer_is_gcc_lt_4_3
;
11442 static file_and_directory
11443 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11445 file_and_directory res
;
11447 /* Find the filename. Do not use dwarf2_name here, since the filename
11448 is not a source language identifier. */
11449 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11450 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11452 if (res
.comp_dir
== NULL
11453 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11454 && IS_ABSOLUTE_PATH (res
.name
))
11456 res
.comp_dir_storage
= ldirname (res
.name
);
11457 if (!res
.comp_dir_storage
.empty ())
11458 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11460 if (res
.comp_dir
!= NULL
)
11462 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11463 directory, get rid of it. */
11464 const char *cp
= strchr (res
.comp_dir
, ':');
11466 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11467 res
.comp_dir
= cp
+ 1;
11470 if (res
.name
== NULL
)
11471 res
.name
= "<unknown>";
11476 /* Handle DW_AT_stmt_list for a compilation unit.
11477 DIE is the DW_TAG_compile_unit die for CU.
11478 COMP_DIR is the compilation directory. LOWPC is passed to
11479 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11482 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11483 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11485 struct dwarf2_per_objfile
*dwarf2_per_objfile
11486 = cu
->per_cu
->dwarf2_per_objfile
;
11487 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11488 struct attribute
*attr
;
11489 struct line_header line_header_local
;
11490 hashval_t line_header_local_hash
;
11492 int decode_mapping
;
11494 gdb_assert (! cu
->per_cu
->is_debug_types
);
11496 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11500 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11502 /* The line header hash table is only created if needed (it exists to
11503 prevent redundant reading of the line table for partial_units).
11504 If we're given a partial_unit, we'll need it. If we're given a
11505 compile_unit, then use the line header hash table if it's already
11506 created, but don't create one just yet. */
11508 if (dwarf2_per_objfile
->line_header_hash
== NULL
11509 && die
->tag
== DW_TAG_partial_unit
)
11511 dwarf2_per_objfile
->line_header_hash
11512 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11513 line_header_eq_voidp
,
11514 free_line_header_voidp
,
11515 &objfile
->objfile_obstack
,
11516 hashtab_obstack_allocate
,
11517 dummy_obstack_deallocate
);
11520 line_header_local
.sect_off
= line_offset
;
11521 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11522 line_header_local_hash
= line_header_hash (&line_header_local
);
11523 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11525 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11526 &line_header_local
,
11527 line_header_local_hash
, NO_INSERT
);
11529 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11530 is not present in *SLOT (since if there is something in *SLOT then
11531 it will be for a partial_unit). */
11532 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11534 gdb_assert (*slot
!= NULL
);
11535 cu
->line_header
= (struct line_header
*) *slot
;
11540 /* dwarf_decode_line_header does not yet provide sufficient information.
11541 We always have to call also dwarf_decode_lines for it. */
11542 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11546 cu
->line_header
= lh
.release ();
11547 cu
->line_header_die_owner
= die
;
11549 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11553 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11554 &line_header_local
,
11555 line_header_local_hash
, INSERT
);
11556 gdb_assert (slot
!= NULL
);
11558 if (slot
!= NULL
&& *slot
== NULL
)
11560 /* This newly decoded line number information unit will be owned
11561 by line_header_hash hash table. */
11562 *slot
= cu
->line_header
;
11563 cu
->line_header_die_owner
= NULL
;
11567 /* We cannot free any current entry in (*slot) as that struct line_header
11568 may be already used by multiple CUs. Create only temporary decoded
11569 line_header for this CU - it may happen at most once for each line
11570 number information unit. And if we're not using line_header_hash
11571 then this is what we want as well. */
11572 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11574 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11575 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11580 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11583 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11585 struct dwarf2_per_objfile
*dwarf2_per_objfile
11586 = cu
->per_cu
->dwarf2_per_objfile
;
11587 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11588 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11589 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11590 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11591 struct attribute
*attr
;
11592 struct die_info
*child_die
;
11593 CORE_ADDR baseaddr
;
11595 prepare_one_comp_unit (cu
, die
, cu
->language
);
11596 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11598 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11600 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11601 from finish_block. */
11602 if (lowpc
== ((CORE_ADDR
) -1))
11604 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11606 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11608 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11609 standardised yet. As a workaround for the language detection we fall
11610 back to the DW_AT_producer string. */
11611 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11612 cu
->language
= language_opencl
;
11614 /* Similar hack for Go. */
11615 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11616 set_cu_language (DW_LANG_Go
, cu
);
11618 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11620 /* Decode line number information if present. We do this before
11621 processing child DIEs, so that the line header table is available
11622 for DW_AT_decl_file. */
11623 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11625 /* Process all dies in compilation unit. */
11626 if (die
->child
!= NULL
)
11628 child_die
= die
->child
;
11629 while (child_die
&& child_die
->tag
)
11631 process_die (child_die
, cu
);
11632 child_die
= sibling_die (child_die
);
11636 /* Decode macro information, if present. Dwarf 2 macro information
11637 refers to information in the line number info statement program
11638 header, so we can only read it if we've read the header
11640 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11642 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11643 if (attr
&& cu
->line_header
)
11645 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11646 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11648 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11652 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11653 if (attr
&& cu
->line_header
)
11655 unsigned int macro_offset
= DW_UNSND (attr
);
11657 dwarf_decode_macros (cu
, macro_offset
, 0);
11663 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11665 struct type_unit_group
*tu_group
;
11667 struct attribute
*attr
;
11669 struct signatured_type
*sig_type
;
11671 gdb_assert (per_cu
->is_debug_types
);
11672 sig_type
= (struct signatured_type
*) per_cu
;
11674 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11676 /* If we're using .gdb_index (includes -readnow) then
11677 per_cu->type_unit_group may not have been set up yet. */
11678 if (sig_type
->type_unit_group
== NULL
)
11679 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11680 tu_group
= sig_type
->type_unit_group
;
11682 /* If we've already processed this stmt_list there's no real need to
11683 do it again, we could fake it and just recreate the part we need
11684 (file name,index -> symtab mapping). If data shows this optimization
11685 is useful we can do it then. */
11686 first_time
= tu_group
->compunit_symtab
== NULL
;
11688 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11693 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11694 lh
= dwarf_decode_line_header (line_offset
, this);
11699 start_symtab ("", NULL
, 0);
11702 gdb_assert (tu_group
->symtabs
== NULL
);
11703 gdb_assert (m_builder
== nullptr);
11704 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11705 m_builder
.reset (new struct buildsym_compunit
11706 (COMPUNIT_OBJFILE (cust
), "",
11707 COMPUNIT_DIRNAME (cust
),
11708 compunit_language (cust
),
11714 line_header
= lh
.release ();
11715 line_header_die_owner
= die
;
11719 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11721 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11722 still initializing it, and our caller (a few levels up)
11723 process_full_type_unit still needs to know if this is the first
11726 tu_group
->num_symtabs
= line_header
->file_names_size ();
11727 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11728 line_header
->file_names_size ());
11730 auto &file_names
= line_header
->file_names ();
11731 for (i
= 0; i
< file_names
.size (); ++i
)
11733 file_entry
&fe
= file_names
[i
];
11734 dwarf2_start_subfile (this, fe
.name
,
11735 fe
.include_dir (line_header
));
11736 buildsym_compunit
*b
= get_builder ();
11737 if (b
->get_current_subfile ()->symtab
== NULL
)
11739 /* NOTE: start_subfile will recognize when it's been
11740 passed a file it has already seen. So we can't
11741 assume there's a simple mapping from
11742 cu->line_header->file_names to subfiles, plus
11743 cu->line_header->file_names may contain dups. */
11744 b
->get_current_subfile ()->symtab
11745 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11748 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11749 tu_group
->symtabs
[i
] = fe
.symtab
;
11754 gdb_assert (m_builder
== nullptr);
11755 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11756 m_builder
.reset (new struct buildsym_compunit
11757 (COMPUNIT_OBJFILE (cust
), "",
11758 COMPUNIT_DIRNAME (cust
),
11759 compunit_language (cust
),
11762 auto &file_names
= line_header
->file_names ();
11763 for (i
= 0; i
< file_names
.size (); ++i
)
11765 file_entry
&fe
= file_names
[i
];
11766 fe
.symtab
= tu_group
->symtabs
[i
];
11770 /* The main symtab is allocated last. Type units don't have DW_AT_name
11771 so they don't have a "real" (so to speak) symtab anyway.
11772 There is later code that will assign the main symtab to all symbols
11773 that don't have one. We need to handle the case of a symbol with a
11774 missing symtab (DW_AT_decl_file) anyway. */
11777 /* Process DW_TAG_type_unit.
11778 For TUs we want to skip the first top level sibling if it's not the
11779 actual type being defined by this TU. In this case the first top
11780 level sibling is there to provide context only. */
11783 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11785 struct die_info
*child_die
;
11787 prepare_one_comp_unit (cu
, die
, language_minimal
);
11789 /* Initialize (or reinitialize) the machinery for building symtabs.
11790 We do this before processing child DIEs, so that the line header table
11791 is available for DW_AT_decl_file. */
11792 cu
->setup_type_unit_groups (die
);
11794 if (die
->child
!= NULL
)
11796 child_die
= die
->child
;
11797 while (child_die
&& child_die
->tag
)
11799 process_die (child_die
, cu
);
11800 child_die
= sibling_die (child_die
);
11807 http://gcc.gnu.org/wiki/DebugFission
11808 http://gcc.gnu.org/wiki/DebugFissionDWP
11810 To simplify handling of both DWO files ("object" files with the DWARF info)
11811 and DWP files (a file with the DWOs packaged up into one file), we treat
11812 DWP files as having a collection of virtual DWO files. */
11815 hash_dwo_file (const void *item
)
11817 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11820 hash
= htab_hash_string (dwo_file
->dwo_name
);
11821 if (dwo_file
->comp_dir
!= NULL
)
11822 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11827 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11829 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11830 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11832 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11834 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11835 return lhs
->comp_dir
== rhs
->comp_dir
;
11836 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11839 /* Allocate a hash table for DWO files. */
11842 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11844 auto delete_dwo_file
= [] (void *item
)
11846 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11851 return htab_up (htab_create_alloc_ex (41,
11855 &objfile
->objfile_obstack
,
11856 hashtab_obstack_allocate
,
11857 dummy_obstack_deallocate
));
11860 /* Lookup DWO file DWO_NAME. */
11863 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11864 const char *dwo_name
,
11865 const char *comp_dir
)
11867 struct dwo_file find_entry
;
11870 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11871 dwarf2_per_objfile
->dwo_files
11872 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11874 find_entry
.dwo_name
= dwo_name
;
11875 find_entry
.comp_dir
= comp_dir
;
11876 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11883 hash_dwo_unit (const void *item
)
11885 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11887 /* This drops the top 32 bits of the id, but is ok for a hash. */
11888 return dwo_unit
->signature
;
11892 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11894 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11895 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11897 /* The signature is assumed to be unique within the DWO file.
11898 So while object file CU dwo_id's always have the value zero,
11899 that's OK, assuming each object file DWO file has only one CU,
11900 and that's the rule for now. */
11901 return lhs
->signature
== rhs
->signature
;
11904 /* Allocate a hash table for DWO CUs,TUs.
11905 There is one of these tables for each of CUs,TUs for each DWO file. */
11908 allocate_dwo_unit_table (struct objfile
*objfile
)
11910 /* Start out with a pretty small number.
11911 Generally DWO files contain only one CU and maybe some TUs. */
11912 return htab_create_alloc_ex (3,
11916 &objfile
->objfile_obstack
,
11917 hashtab_obstack_allocate
,
11918 dummy_obstack_deallocate
);
11921 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11923 struct create_dwo_cu_data
11925 struct dwo_file
*dwo_file
;
11926 struct dwo_unit dwo_unit
;
11929 /* die_reader_func for create_dwo_cu. */
11932 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11933 const gdb_byte
*info_ptr
,
11934 struct die_info
*comp_unit_die
,
11938 struct dwarf2_cu
*cu
= reader
->cu
;
11939 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11940 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11941 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11942 struct dwo_file
*dwo_file
= data
->dwo_file
;
11943 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11945 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11946 if (!signature
.has_value ())
11948 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11949 " its dwo_id [in module %s]"),
11950 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11954 dwo_unit
->dwo_file
= dwo_file
;
11955 dwo_unit
->signature
= *signature
;
11956 dwo_unit
->section
= section
;
11957 dwo_unit
->sect_off
= sect_off
;
11958 dwo_unit
->length
= cu
->per_cu
->length
;
11960 if (dwarf_read_debug
)
11961 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11962 sect_offset_str (sect_off
),
11963 hex_string (dwo_unit
->signature
));
11966 /* Create the dwo_units for the CUs in a DWO_FILE.
11967 Note: This function processes DWO files only, not DWP files. */
11970 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11971 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11974 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11975 const gdb_byte
*info_ptr
, *end_ptr
;
11977 dwarf2_read_section (objfile
, §ion
);
11978 info_ptr
= section
.buffer
;
11980 if (info_ptr
== NULL
)
11983 if (dwarf_read_debug
)
11985 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11986 get_section_name (§ion
),
11987 get_section_file_name (§ion
));
11990 end_ptr
= info_ptr
+ section
.size
;
11991 while (info_ptr
< end_ptr
)
11993 struct dwarf2_per_cu_data per_cu
;
11994 struct create_dwo_cu_data create_dwo_cu_data
;
11995 struct dwo_unit
*dwo_unit
;
11997 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11999 memset (&create_dwo_cu_data
.dwo_unit
, 0,
12000 sizeof (create_dwo_cu_data
.dwo_unit
));
12001 memset (&per_cu
, 0, sizeof (per_cu
));
12002 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
12003 per_cu
.is_debug_types
= 0;
12004 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
12005 per_cu
.section
= §ion
;
12006 create_dwo_cu_data
.dwo_file
= &dwo_file
;
12008 init_cutu_and_read_dies_no_follow (
12009 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
12010 info_ptr
+= per_cu
.length
;
12012 // If the unit could not be parsed, skip it.
12013 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
12016 if (cus_htab
== NULL
)
12017 cus_htab
= allocate_dwo_unit_table (objfile
);
12019 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12020 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
12021 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
12022 gdb_assert (slot
!= NULL
);
12025 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
12026 sect_offset dup_sect_off
= dup_cu
->sect_off
;
12028 complaint (_("debug cu entry at offset %s is duplicate to"
12029 " the entry at offset %s, signature %s"),
12030 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
12031 hex_string (dwo_unit
->signature
));
12033 *slot
= (void *)dwo_unit
;
12037 /* DWP file .debug_{cu,tu}_index section format:
12038 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
12042 Both index sections have the same format, and serve to map a 64-bit
12043 signature to a set of section numbers. Each section begins with a header,
12044 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
12045 indexes, and a pool of 32-bit section numbers. The index sections will be
12046 aligned at 8-byte boundaries in the file.
12048 The index section header consists of:
12050 V, 32 bit version number
12052 N, 32 bit number of compilation units or type units in the index
12053 M, 32 bit number of slots in the hash table
12055 Numbers are recorded using the byte order of the application binary.
12057 The hash table begins at offset 16 in the section, and consists of an array
12058 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12059 order of the application binary). Unused slots in the hash table are 0.
12060 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12062 The parallel table begins immediately after the hash table
12063 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12064 array of 32-bit indexes (using the byte order of the application binary),
12065 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12066 table contains a 32-bit index into the pool of section numbers. For unused
12067 hash table slots, the corresponding entry in the parallel table will be 0.
12069 The pool of section numbers begins immediately following the hash table
12070 (at offset 16 + 12 * M from the beginning of the section). The pool of
12071 section numbers consists of an array of 32-bit words (using the byte order
12072 of the application binary). Each item in the array is indexed starting
12073 from 0. The hash table entry provides the index of the first section
12074 number in the set. Additional section numbers in the set follow, and the
12075 set is terminated by a 0 entry (section number 0 is not used in ELF).
12077 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12078 section must be the first entry in the set, and the .debug_abbrev.dwo must
12079 be the second entry. Other members of the set may follow in any order.
12085 DWP Version 2 combines all the .debug_info, etc. sections into one,
12086 and the entries in the index tables are now offsets into these sections.
12087 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12090 Index Section Contents:
12092 Hash Table of Signatures dwp_hash_table.hash_table
12093 Parallel Table of Indices dwp_hash_table.unit_table
12094 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12095 Table of Section Sizes dwp_hash_table.v2.sizes
12097 The index section header consists of:
12099 V, 32 bit version number
12100 L, 32 bit number of columns in the table of section offsets
12101 N, 32 bit number of compilation units or type units in the index
12102 M, 32 bit number of slots in the hash table
12104 Numbers are recorded using the byte order of the application binary.
12106 The hash table has the same format as version 1.
12107 The parallel table of indices has the same format as version 1,
12108 except that the entries are origin-1 indices into the table of sections
12109 offsets and the table of section sizes.
12111 The table of offsets begins immediately following the parallel table
12112 (at offset 16 + 12 * M from the beginning of the section). The table is
12113 a two-dimensional array of 32-bit words (using the byte order of the
12114 application binary), with L columns and N+1 rows, in row-major order.
12115 Each row in the array is indexed starting from 0. The first row provides
12116 a key to the remaining rows: each column in this row provides an identifier
12117 for a debug section, and the offsets in the same column of subsequent rows
12118 refer to that section. The section identifiers are:
12120 DW_SECT_INFO 1 .debug_info.dwo
12121 DW_SECT_TYPES 2 .debug_types.dwo
12122 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12123 DW_SECT_LINE 4 .debug_line.dwo
12124 DW_SECT_LOC 5 .debug_loc.dwo
12125 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12126 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12127 DW_SECT_MACRO 8 .debug_macro.dwo
12129 The offsets provided by the CU and TU index sections are the base offsets
12130 for the contributions made by each CU or TU to the corresponding section
12131 in the package file. Each CU and TU header contains an abbrev_offset
12132 field, used to find the abbreviations table for that CU or TU within the
12133 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12134 be interpreted as relative to the base offset given in the index section.
12135 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12136 should be interpreted as relative to the base offset for .debug_line.dwo,
12137 and offsets into other debug sections obtained from DWARF attributes should
12138 also be interpreted as relative to the corresponding base offset.
12140 The table of sizes begins immediately following the table of offsets.
12141 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12142 with L columns and N rows, in row-major order. Each row in the array is
12143 indexed starting from 1 (row 0 is shared by the two tables).
12147 Hash table lookup is handled the same in version 1 and 2:
12149 We assume that N and M will not exceed 2^32 - 1.
12150 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12152 Given a 64-bit compilation unit signature or a type signature S, an entry
12153 in the hash table is located as follows:
12155 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12156 the low-order k bits all set to 1.
12158 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12160 3) If the hash table entry at index H matches the signature, use that
12161 entry. If the hash table entry at index H is unused (all zeroes),
12162 terminate the search: the signature is not present in the table.
12164 4) Let H = (H + H') modulo M. Repeat at Step 3.
12166 Because M > N and H' and M are relatively prime, the search is guaranteed
12167 to stop at an unused slot or find the match. */
12169 /* Create a hash table to map DWO IDs to their CU/TU entry in
12170 .debug_{info,types}.dwo in DWP_FILE.
12171 Returns NULL if there isn't one.
12172 Note: This function processes DWP files only, not DWO files. */
12174 static struct dwp_hash_table
*
12175 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12176 struct dwp_file
*dwp_file
, int is_debug_types
)
12178 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12179 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12180 const gdb_byte
*index_ptr
, *index_end
;
12181 struct dwarf2_section_info
*index
;
12182 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12183 struct dwp_hash_table
*htab
;
12185 if (is_debug_types
)
12186 index
= &dwp_file
->sections
.tu_index
;
12188 index
= &dwp_file
->sections
.cu_index
;
12190 if (dwarf2_section_empty_p (index
))
12192 dwarf2_read_section (objfile
, index
);
12194 index_ptr
= index
->buffer
;
12195 index_end
= index_ptr
+ index
->size
;
12197 version
= read_4_bytes (dbfd
, index_ptr
);
12200 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12204 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12206 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12209 if (version
!= 1 && version
!= 2)
12211 error (_("Dwarf Error: unsupported DWP file version (%s)"
12212 " [in module %s]"),
12213 pulongest (version
), dwp_file
->name
);
12215 if (nr_slots
!= (nr_slots
& -nr_slots
))
12217 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12218 " is not power of 2 [in module %s]"),
12219 pulongest (nr_slots
), dwp_file
->name
);
12222 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12223 htab
->version
= version
;
12224 htab
->nr_columns
= nr_columns
;
12225 htab
->nr_units
= nr_units
;
12226 htab
->nr_slots
= nr_slots
;
12227 htab
->hash_table
= index_ptr
;
12228 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12230 /* Exit early if the table is empty. */
12231 if (nr_slots
== 0 || nr_units
== 0
12232 || (version
== 2 && nr_columns
== 0))
12234 /* All must be zero. */
12235 if (nr_slots
!= 0 || nr_units
!= 0
12236 || (version
== 2 && nr_columns
!= 0))
12238 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12239 " all zero [in modules %s]"),
12247 htab
->section_pool
.v1
.indices
=
12248 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12249 /* It's harder to decide whether the section is too small in v1.
12250 V1 is deprecated anyway so we punt. */
12254 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12255 int *ids
= htab
->section_pool
.v2
.section_ids
;
12256 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
12257 /* Reverse map for error checking. */
12258 int ids_seen
[DW_SECT_MAX
+ 1];
12261 if (nr_columns
< 2)
12263 error (_("Dwarf Error: bad DWP hash table, too few columns"
12264 " in section table [in module %s]"),
12267 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12269 error (_("Dwarf Error: bad DWP hash table, too many columns"
12270 " in section table [in module %s]"),
12273 memset (ids
, 255, sizeof_ids
);
12274 memset (ids_seen
, 255, sizeof (ids_seen
));
12275 for (i
= 0; i
< nr_columns
; ++i
)
12277 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12279 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12281 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12282 " in section table [in module %s]"),
12283 id
, dwp_file
->name
);
12285 if (ids_seen
[id
] != -1)
12287 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12288 " id %d in section table [in module %s]"),
12289 id
, dwp_file
->name
);
12294 /* Must have exactly one info or types section. */
12295 if (((ids_seen
[DW_SECT_INFO
] != -1)
12296 + (ids_seen
[DW_SECT_TYPES
] != -1))
12299 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12300 " DWO info/types section [in module %s]"),
12303 /* Must have an abbrev section. */
12304 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12306 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12307 " section [in module %s]"),
12310 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12311 htab
->section_pool
.v2
.sizes
=
12312 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12313 * nr_units
* nr_columns
);
12314 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12315 * nr_units
* nr_columns
))
12318 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12319 " [in module %s]"),
12327 /* Update SECTIONS with the data from SECTP.
12329 This function is like the other "locate" section routines that are
12330 passed to bfd_map_over_sections, but in this context the sections to
12331 read comes from the DWP V1 hash table, not the full ELF section table.
12333 The result is non-zero for success, or zero if an error was found. */
12336 locate_v1_virtual_dwo_sections (asection
*sectp
,
12337 struct virtual_v1_dwo_sections
*sections
)
12339 const struct dwop_section_names
*names
= &dwop_section_names
;
12341 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12343 /* There can be only one. */
12344 if (sections
->abbrev
.s
.section
!= NULL
)
12346 sections
->abbrev
.s
.section
= sectp
;
12347 sections
->abbrev
.size
= bfd_section_size (sectp
);
12349 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12350 || section_is_p (sectp
->name
, &names
->types_dwo
))
12352 /* There can be only one. */
12353 if (sections
->info_or_types
.s
.section
!= NULL
)
12355 sections
->info_or_types
.s
.section
= sectp
;
12356 sections
->info_or_types
.size
= bfd_section_size (sectp
);
12358 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12360 /* There can be only one. */
12361 if (sections
->line
.s
.section
!= NULL
)
12363 sections
->line
.s
.section
= sectp
;
12364 sections
->line
.size
= bfd_section_size (sectp
);
12366 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12368 /* There can be only one. */
12369 if (sections
->loc
.s
.section
!= NULL
)
12371 sections
->loc
.s
.section
= sectp
;
12372 sections
->loc
.size
= bfd_section_size (sectp
);
12374 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12376 /* There can be only one. */
12377 if (sections
->macinfo
.s
.section
!= NULL
)
12379 sections
->macinfo
.s
.section
= sectp
;
12380 sections
->macinfo
.size
= bfd_section_size (sectp
);
12382 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12384 /* There can be only one. */
12385 if (sections
->macro
.s
.section
!= NULL
)
12387 sections
->macro
.s
.section
= sectp
;
12388 sections
->macro
.size
= bfd_section_size (sectp
);
12390 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12392 /* There can be only one. */
12393 if (sections
->str_offsets
.s
.section
!= NULL
)
12395 sections
->str_offsets
.s
.section
= sectp
;
12396 sections
->str_offsets
.size
= bfd_section_size (sectp
);
12400 /* No other kind of section is valid. */
12407 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12408 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12409 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12410 This is for DWP version 1 files. */
12412 static struct dwo_unit
*
12413 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12414 struct dwp_file
*dwp_file
,
12415 uint32_t unit_index
,
12416 const char *comp_dir
,
12417 ULONGEST signature
, int is_debug_types
)
12419 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12420 const struct dwp_hash_table
*dwp_htab
=
12421 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12422 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12423 const char *kind
= is_debug_types
? "TU" : "CU";
12424 struct dwo_file
*dwo_file
;
12425 struct dwo_unit
*dwo_unit
;
12426 struct virtual_v1_dwo_sections sections
;
12427 void **dwo_file_slot
;
12430 gdb_assert (dwp_file
->version
== 1);
12432 if (dwarf_read_debug
)
12434 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12436 pulongest (unit_index
), hex_string (signature
),
12440 /* Fetch the sections of this DWO unit.
12441 Put a limit on the number of sections we look for so that bad data
12442 doesn't cause us to loop forever. */
12444 #define MAX_NR_V1_DWO_SECTIONS \
12445 (1 /* .debug_info or .debug_types */ \
12446 + 1 /* .debug_abbrev */ \
12447 + 1 /* .debug_line */ \
12448 + 1 /* .debug_loc */ \
12449 + 1 /* .debug_str_offsets */ \
12450 + 1 /* .debug_macro or .debug_macinfo */ \
12451 + 1 /* trailing zero */)
12453 memset (§ions
, 0, sizeof (sections
));
12455 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12458 uint32_t section_nr
=
12459 read_4_bytes (dbfd
,
12460 dwp_htab
->section_pool
.v1
.indices
12461 + (unit_index
+ i
) * sizeof (uint32_t));
12463 if (section_nr
== 0)
12465 if (section_nr
>= dwp_file
->num_sections
)
12467 error (_("Dwarf Error: bad DWP hash table, section number too large"
12468 " [in module %s]"),
12472 sectp
= dwp_file
->elf_sections
[section_nr
];
12473 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12475 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12476 " [in module %s]"),
12482 || dwarf2_section_empty_p (§ions
.info_or_types
)
12483 || dwarf2_section_empty_p (§ions
.abbrev
))
12485 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12486 " [in module %s]"),
12489 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12491 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12492 " [in module %s]"),
12496 /* It's easier for the rest of the code if we fake a struct dwo_file and
12497 have dwo_unit "live" in that. At least for now.
12499 The DWP file can be made up of a random collection of CUs and TUs.
12500 However, for each CU + set of TUs that came from the same original DWO
12501 file, we can combine them back into a virtual DWO file to save space
12502 (fewer struct dwo_file objects to allocate). Remember that for really
12503 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12505 std::string virtual_dwo_name
=
12506 string_printf ("virtual-dwo/%d-%d-%d-%d",
12507 get_section_id (§ions
.abbrev
),
12508 get_section_id (§ions
.line
),
12509 get_section_id (§ions
.loc
),
12510 get_section_id (§ions
.str_offsets
));
12511 /* Can we use an existing virtual DWO file? */
12512 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12513 virtual_dwo_name
.c_str (),
12515 /* Create one if necessary. */
12516 if (*dwo_file_slot
== NULL
)
12518 if (dwarf_read_debug
)
12520 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12521 virtual_dwo_name
.c_str ());
12523 dwo_file
= new struct dwo_file
;
12524 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12526 dwo_file
->comp_dir
= comp_dir
;
12527 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12528 dwo_file
->sections
.line
= sections
.line
;
12529 dwo_file
->sections
.loc
= sections
.loc
;
12530 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12531 dwo_file
->sections
.macro
= sections
.macro
;
12532 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12533 /* The "str" section is global to the entire DWP file. */
12534 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12535 /* The info or types section is assigned below to dwo_unit,
12536 there's no need to record it in dwo_file.
12537 Also, we can't simply record type sections in dwo_file because
12538 we record a pointer into the vector in dwo_unit. As we collect more
12539 types we'll grow the vector and eventually have to reallocate space
12540 for it, invalidating all copies of pointers into the previous
12542 *dwo_file_slot
= dwo_file
;
12546 if (dwarf_read_debug
)
12548 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12549 virtual_dwo_name
.c_str ());
12551 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12554 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12555 dwo_unit
->dwo_file
= dwo_file
;
12556 dwo_unit
->signature
= signature
;
12557 dwo_unit
->section
=
12558 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12559 *dwo_unit
->section
= sections
.info_or_types
;
12560 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12565 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12566 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12567 piece within that section used by a TU/CU, return a virtual section
12568 of just that piece. */
12570 static struct dwarf2_section_info
12571 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12572 struct dwarf2_section_info
*section
,
12573 bfd_size_type offset
, bfd_size_type size
)
12575 struct dwarf2_section_info result
;
12578 gdb_assert (section
!= NULL
);
12579 gdb_assert (!section
->is_virtual
);
12581 memset (&result
, 0, sizeof (result
));
12582 result
.s
.containing_section
= section
;
12583 result
.is_virtual
= true;
12588 sectp
= get_section_bfd_section (section
);
12590 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12591 bounds of the real section. This is a pretty-rare event, so just
12592 flag an error (easier) instead of a warning and trying to cope. */
12594 || offset
+ size
> bfd_section_size (sectp
))
12596 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12597 " in section %s [in module %s]"),
12598 sectp
? bfd_section_name (sectp
) : "<unknown>",
12599 objfile_name (dwarf2_per_objfile
->objfile
));
12602 result
.virtual_offset
= offset
;
12603 result
.size
= size
;
12607 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12608 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12609 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12610 This is for DWP version 2 files. */
12612 static struct dwo_unit
*
12613 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12614 struct dwp_file
*dwp_file
,
12615 uint32_t unit_index
,
12616 const char *comp_dir
,
12617 ULONGEST signature
, int is_debug_types
)
12619 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12620 const struct dwp_hash_table
*dwp_htab
=
12621 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12622 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12623 const char *kind
= is_debug_types
? "TU" : "CU";
12624 struct dwo_file
*dwo_file
;
12625 struct dwo_unit
*dwo_unit
;
12626 struct virtual_v2_dwo_sections sections
;
12627 void **dwo_file_slot
;
12630 gdb_assert (dwp_file
->version
== 2);
12632 if (dwarf_read_debug
)
12634 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12636 pulongest (unit_index
), hex_string (signature
),
12640 /* Fetch the section offsets of this DWO unit. */
12642 memset (§ions
, 0, sizeof (sections
));
12644 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12646 uint32_t offset
= read_4_bytes (dbfd
,
12647 dwp_htab
->section_pool
.v2
.offsets
12648 + (((unit_index
- 1) * dwp_htab
->nr_columns
12650 * sizeof (uint32_t)));
12651 uint32_t size
= read_4_bytes (dbfd
,
12652 dwp_htab
->section_pool
.v2
.sizes
12653 + (((unit_index
- 1) * dwp_htab
->nr_columns
12655 * sizeof (uint32_t)));
12657 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12660 case DW_SECT_TYPES
:
12661 sections
.info_or_types_offset
= offset
;
12662 sections
.info_or_types_size
= size
;
12664 case DW_SECT_ABBREV
:
12665 sections
.abbrev_offset
= offset
;
12666 sections
.abbrev_size
= size
;
12669 sections
.line_offset
= offset
;
12670 sections
.line_size
= size
;
12673 sections
.loc_offset
= offset
;
12674 sections
.loc_size
= size
;
12676 case DW_SECT_STR_OFFSETS
:
12677 sections
.str_offsets_offset
= offset
;
12678 sections
.str_offsets_size
= size
;
12680 case DW_SECT_MACINFO
:
12681 sections
.macinfo_offset
= offset
;
12682 sections
.macinfo_size
= size
;
12684 case DW_SECT_MACRO
:
12685 sections
.macro_offset
= offset
;
12686 sections
.macro_size
= size
;
12691 /* It's easier for the rest of the code if we fake a struct dwo_file and
12692 have dwo_unit "live" in that. At least for now.
12694 The DWP file can be made up of a random collection of CUs and TUs.
12695 However, for each CU + set of TUs that came from the same original DWO
12696 file, we can combine them back into a virtual DWO file to save space
12697 (fewer struct dwo_file objects to allocate). Remember that for really
12698 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12700 std::string virtual_dwo_name
=
12701 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12702 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12703 (long) (sections
.line_size
? sections
.line_offset
: 0),
12704 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12705 (long) (sections
.str_offsets_size
12706 ? sections
.str_offsets_offset
: 0));
12707 /* Can we use an existing virtual DWO file? */
12708 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12709 virtual_dwo_name
.c_str (),
12711 /* Create one if necessary. */
12712 if (*dwo_file_slot
== NULL
)
12714 if (dwarf_read_debug
)
12716 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12717 virtual_dwo_name
.c_str ());
12719 dwo_file
= new struct dwo_file
;
12720 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12722 dwo_file
->comp_dir
= comp_dir
;
12723 dwo_file
->sections
.abbrev
=
12724 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12725 sections
.abbrev_offset
, sections
.abbrev_size
);
12726 dwo_file
->sections
.line
=
12727 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12728 sections
.line_offset
, sections
.line_size
);
12729 dwo_file
->sections
.loc
=
12730 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12731 sections
.loc_offset
, sections
.loc_size
);
12732 dwo_file
->sections
.macinfo
=
12733 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12734 sections
.macinfo_offset
, sections
.macinfo_size
);
12735 dwo_file
->sections
.macro
=
12736 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12737 sections
.macro_offset
, sections
.macro_size
);
12738 dwo_file
->sections
.str_offsets
=
12739 create_dwp_v2_section (dwarf2_per_objfile
,
12740 &dwp_file
->sections
.str_offsets
,
12741 sections
.str_offsets_offset
,
12742 sections
.str_offsets_size
);
12743 /* The "str" section is global to the entire DWP file. */
12744 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12745 /* The info or types section is assigned below to dwo_unit,
12746 there's no need to record it in dwo_file.
12747 Also, we can't simply record type sections in dwo_file because
12748 we record a pointer into the vector in dwo_unit. As we collect more
12749 types we'll grow the vector and eventually have to reallocate space
12750 for it, invalidating all copies of pointers into the previous
12752 *dwo_file_slot
= dwo_file
;
12756 if (dwarf_read_debug
)
12758 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12759 virtual_dwo_name
.c_str ());
12761 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12764 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12765 dwo_unit
->dwo_file
= dwo_file
;
12766 dwo_unit
->signature
= signature
;
12767 dwo_unit
->section
=
12768 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12769 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12771 ? &dwp_file
->sections
.types
12772 : &dwp_file
->sections
.info
,
12773 sections
.info_or_types_offset
,
12774 sections
.info_or_types_size
);
12775 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12780 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12781 Returns NULL if the signature isn't found. */
12783 static struct dwo_unit
*
12784 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12785 struct dwp_file
*dwp_file
, const char *comp_dir
,
12786 ULONGEST signature
, int is_debug_types
)
12788 const struct dwp_hash_table
*dwp_htab
=
12789 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12790 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12791 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12792 uint32_t hash
= signature
& mask
;
12793 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12796 struct dwo_unit find_dwo_cu
;
12798 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12799 find_dwo_cu
.signature
= signature
;
12800 slot
= htab_find_slot (is_debug_types
12801 ? dwp_file
->loaded_tus
12802 : dwp_file
->loaded_cus
,
12803 &find_dwo_cu
, INSERT
);
12806 return (struct dwo_unit
*) *slot
;
12808 /* Use a for loop so that we don't loop forever on bad debug info. */
12809 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12811 ULONGEST signature_in_table
;
12813 signature_in_table
=
12814 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12815 if (signature_in_table
== signature
)
12817 uint32_t unit_index
=
12818 read_4_bytes (dbfd
,
12819 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12821 if (dwp_file
->version
== 1)
12823 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12824 dwp_file
, unit_index
,
12825 comp_dir
, signature
,
12830 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12831 dwp_file
, unit_index
,
12832 comp_dir
, signature
,
12835 return (struct dwo_unit
*) *slot
;
12837 if (signature_in_table
== 0)
12839 hash
= (hash
+ hash2
) & mask
;
12842 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12843 " [in module %s]"),
12847 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12848 Open the file specified by FILE_NAME and hand it off to BFD for
12849 preliminary analysis. Return a newly initialized bfd *, which
12850 includes a canonicalized copy of FILE_NAME.
12851 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12852 SEARCH_CWD is true if the current directory is to be searched.
12853 It will be searched before debug-file-directory.
12854 If successful, the file is added to the bfd include table of the
12855 objfile's bfd (see gdb_bfd_record_inclusion).
12856 If unable to find/open the file, return NULL.
12857 NOTE: This function is derived from symfile_bfd_open. */
12859 static gdb_bfd_ref_ptr
12860 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12861 const char *file_name
, int is_dwp
, int search_cwd
)
12864 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12865 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12866 to debug_file_directory. */
12867 const char *search_path
;
12868 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12870 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12873 if (*debug_file_directory
!= '\0')
12875 search_path_holder
.reset (concat (".", dirname_separator_string
,
12876 debug_file_directory
,
12878 search_path
= search_path_holder
.get ();
12884 search_path
= debug_file_directory
;
12886 openp_flags flags
= OPF_RETURN_REALPATH
;
12888 flags
|= OPF_SEARCH_IN_PATH
;
12890 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12891 desc
= openp (search_path
, flags
, file_name
,
12892 O_RDONLY
| O_BINARY
, &absolute_name
);
12896 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12898 if (sym_bfd
== NULL
)
12900 bfd_set_cacheable (sym_bfd
.get (), 1);
12902 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12905 /* Success. Record the bfd as having been included by the objfile's bfd.
12906 This is important because things like demangled_names_hash lives in the
12907 objfile's per_bfd space and may have references to things like symbol
12908 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12909 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12914 /* Try to open DWO file FILE_NAME.
12915 COMP_DIR is the DW_AT_comp_dir attribute.
12916 The result is the bfd handle of the file.
12917 If there is a problem finding or opening the file, return NULL.
12918 Upon success, the canonicalized path of the file is stored in the bfd,
12919 same as symfile_bfd_open. */
12921 static gdb_bfd_ref_ptr
12922 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12923 const char *file_name
, const char *comp_dir
)
12925 if (IS_ABSOLUTE_PATH (file_name
))
12926 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12927 0 /*is_dwp*/, 0 /*search_cwd*/);
12929 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12931 if (comp_dir
!= NULL
)
12933 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12934 file_name
, (char *) NULL
);
12936 /* NOTE: If comp_dir is a relative path, this will also try the
12937 search path, which seems useful. */
12938 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12941 1 /*search_cwd*/));
12942 xfree (path_to_try
);
12947 /* That didn't work, try debug-file-directory, which, despite its name,
12948 is a list of paths. */
12950 if (*debug_file_directory
== '\0')
12953 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12954 0 /*is_dwp*/, 1 /*search_cwd*/);
12957 /* This function is mapped across the sections and remembers the offset and
12958 size of each of the DWO debugging sections we are interested in. */
12961 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12963 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12964 const struct dwop_section_names
*names
= &dwop_section_names
;
12966 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12968 dwo_sections
->abbrev
.s
.section
= sectp
;
12969 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12971 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12973 dwo_sections
->info
.s
.section
= sectp
;
12974 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12976 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12978 dwo_sections
->line
.s
.section
= sectp
;
12979 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12981 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12983 dwo_sections
->loc
.s
.section
= sectp
;
12984 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12986 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12988 dwo_sections
->macinfo
.s
.section
= sectp
;
12989 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12991 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12993 dwo_sections
->macro
.s
.section
= sectp
;
12994 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12996 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12998 dwo_sections
->str
.s
.section
= sectp
;
12999 dwo_sections
->str
.size
= bfd_section_size (sectp
);
13001 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13003 dwo_sections
->str_offsets
.s
.section
= sectp
;
13004 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
13006 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13008 struct dwarf2_section_info type_section
;
13010 memset (&type_section
, 0, sizeof (type_section
));
13011 type_section
.s
.section
= sectp
;
13012 type_section
.size
= bfd_section_size (sectp
);
13013 dwo_sections
->types
.push_back (type_section
);
13017 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
13018 by PER_CU. This is for the non-DWP case.
13019 The result is NULL if DWO_NAME can't be found. */
13021 static struct dwo_file
*
13022 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
13023 const char *dwo_name
, const char *comp_dir
)
13025 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
13027 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
13030 if (dwarf_read_debug
)
13031 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
13035 dwo_file_up
dwo_file (new struct dwo_file
);
13036 dwo_file
->dwo_name
= dwo_name
;
13037 dwo_file
->comp_dir
= comp_dir
;
13038 dwo_file
->dbfd
= std::move (dbfd
);
13040 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
13041 &dwo_file
->sections
);
13043 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
13046 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
13047 dwo_file
->sections
.types
, dwo_file
->tus
);
13049 if (dwarf_read_debug
)
13050 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13052 return dwo_file
.release ();
13055 /* This function is mapped across the sections and remembers the offset and
13056 size of each of the DWP debugging sections common to version 1 and 2 that
13057 we are interested in. */
13060 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13061 void *dwp_file_ptr
)
13063 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13064 const struct dwop_section_names
*names
= &dwop_section_names
;
13065 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13067 /* Record the ELF section number for later lookup: this is what the
13068 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13069 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13070 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13072 /* Look for specific sections that we need. */
13073 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13075 dwp_file
->sections
.str
.s
.section
= sectp
;
13076 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
13078 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13080 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13081 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
13083 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13085 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13086 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
13090 /* This function is mapped across the sections and remembers the offset and
13091 size of each of the DWP version 2 debugging sections that we are interested
13092 in. This is split into a separate function because we don't know if we
13093 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13096 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13098 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13099 const struct dwop_section_names
*names
= &dwop_section_names
;
13100 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13102 /* Record the ELF section number for later lookup: this is what the
13103 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13104 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13105 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13107 /* Look for specific sections that we need. */
13108 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13110 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13111 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
13113 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13115 dwp_file
->sections
.info
.s
.section
= sectp
;
13116 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
13118 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13120 dwp_file
->sections
.line
.s
.section
= sectp
;
13121 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
13123 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13125 dwp_file
->sections
.loc
.s
.section
= sectp
;
13126 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
13128 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13130 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13131 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
13133 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13135 dwp_file
->sections
.macro
.s
.section
= sectp
;
13136 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
13138 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13140 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13141 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
13143 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13145 dwp_file
->sections
.types
.s
.section
= sectp
;
13146 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
13150 /* Hash function for dwp_file loaded CUs/TUs. */
13153 hash_dwp_loaded_cutus (const void *item
)
13155 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13157 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13158 return dwo_unit
->signature
;
13161 /* Equality function for dwp_file loaded CUs/TUs. */
13164 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13166 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13167 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13169 return dua
->signature
== dub
->signature
;
13172 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13175 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13177 return htab_create_alloc_ex (3,
13178 hash_dwp_loaded_cutus
,
13179 eq_dwp_loaded_cutus
,
13181 &objfile
->objfile_obstack
,
13182 hashtab_obstack_allocate
,
13183 dummy_obstack_deallocate
);
13186 /* Try to open DWP file FILE_NAME.
13187 The result is the bfd handle of the file.
13188 If there is a problem finding or opening the file, return NULL.
13189 Upon success, the canonicalized path of the file is stored in the bfd,
13190 same as symfile_bfd_open. */
13192 static gdb_bfd_ref_ptr
13193 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13194 const char *file_name
)
13196 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13198 1 /*search_cwd*/));
13202 /* Work around upstream bug 15652.
13203 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13204 [Whether that's a "bug" is debatable, but it is getting in our way.]
13205 We have no real idea where the dwp file is, because gdb's realpath-ing
13206 of the executable's path may have discarded the needed info.
13207 [IWBN if the dwp file name was recorded in the executable, akin to
13208 .gnu_debuglink, but that doesn't exist yet.]
13209 Strip the directory from FILE_NAME and search again. */
13210 if (*debug_file_directory
!= '\0')
13212 /* Don't implicitly search the current directory here.
13213 If the user wants to search "." to handle this case,
13214 it must be added to debug-file-directory. */
13215 return try_open_dwop_file (dwarf2_per_objfile
,
13216 lbasename (file_name
), 1 /*is_dwp*/,
13223 /* Initialize the use of the DWP file for the current objfile.
13224 By convention the name of the DWP file is ${objfile}.dwp.
13225 The result is NULL if it can't be found. */
13227 static std::unique_ptr
<struct dwp_file
>
13228 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13230 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13232 /* Try to find first .dwp for the binary file before any symbolic links
13235 /* If the objfile is a debug file, find the name of the real binary
13236 file and get the name of dwp file from there. */
13237 std::string dwp_name
;
13238 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13240 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13241 const char *backlink_basename
= lbasename (backlink
->original_name
);
13243 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13246 dwp_name
= objfile
->original_name
;
13248 dwp_name
+= ".dwp";
13250 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13252 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13254 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13255 dwp_name
= objfile_name (objfile
);
13256 dwp_name
+= ".dwp";
13257 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13262 if (dwarf_read_debug
)
13263 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13264 return std::unique_ptr
<dwp_file
> ();
13267 const char *name
= bfd_get_filename (dbfd
.get ());
13268 std::unique_ptr
<struct dwp_file
> dwp_file
13269 (new struct dwp_file (name
, std::move (dbfd
)));
13271 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13272 dwp_file
->elf_sections
=
13273 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13274 dwp_file
->num_sections
, asection
*);
13276 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13277 dwarf2_locate_common_dwp_sections
,
13280 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13283 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13286 /* The DWP file version is stored in the hash table. Oh well. */
13287 if (dwp_file
->cus
&& dwp_file
->tus
13288 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13290 /* Technically speaking, we should try to limp along, but this is
13291 pretty bizarre. We use pulongest here because that's the established
13292 portability solution (e.g, we cannot use %u for uint32_t). */
13293 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13294 " TU version %s [in DWP file %s]"),
13295 pulongest (dwp_file
->cus
->version
),
13296 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13300 dwp_file
->version
= dwp_file
->cus
->version
;
13301 else if (dwp_file
->tus
)
13302 dwp_file
->version
= dwp_file
->tus
->version
;
13304 dwp_file
->version
= 2;
13306 if (dwp_file
->version
== 2)
13307 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13308 dwarf2_locate_v2_dwp_sections
,
13311 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13312 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13314 if (dwarf_read_debug
)
13316 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13317 fprintf_unfiltered (gdb_stdlog
,
13318 " %s CUs, %s TUs\n",
13319 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13320 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13326 /* Wrapper around open_and_init_dwp_file, only open it once. */
13328 static struct dwp_file
*
13329 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13331 if (! dwarf2_per_objfile
->dwp_checked
)
13333 dwarf2_per_objfile
->dwp_file
13334 = open_and_init_dwp_file (dwarf2_per_objfile
);
13335 dwarf2_per_objfile
->dwp_checked
= 1;
13337 return dwarf2_per_objfile
->dwp_file
.get ();
13340 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13341 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13342 or in the DWP file for the objfile, referenced by THIS_UNIT.
13343 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13344 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13346 This is called, for example, when wanting to read a variable with a
13347 complex location. Therefore we don't want to do file i/o for every call.
13348 Therefore we don't want to look for a DWO file on every call.
13349 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13350 then we check if we've already seen DWO_NAME, and only THEN do we check
13353 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13354 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13356 static struct dwo_unit
*
13357 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13358 const char *dwo_name
, const char *comp_dir
,
13359 ULONGEST signature
, int is_debug_types
)
13361 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13362 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13363 const char *kind
= is_debug_types
? "TU" : "CU";
13364 void **dwo_file_slot
;
13365 struct dwo_file
*dwo_file
;
13366 struct dwp_file
*dwp_file
;
13368 /* First see if there's a DWP file.
13369 If we have a DWP file but didn't find the DWO inside it, don't
13370 look for the original DWO file. It makes gdb behave differently
13371 depending on whether one is debugging in the build tree. */
13373 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13374 if (dwp_file
!= NULL
)
13376 const struct dwp_hash_table
*dwp_htab
=
13377 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13379 if (dwp_htab
!= NULL
)
13381 struct dwo_unit
*dwo_cutu
=
13382 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13383 signature
, is_debug_types
);
13385 if (dwo_cutu
!= NULL
)
13387 if (dwarf_read_debug
)
13389 fprintf_unfiltered (gdb_stdlog
,
13390 "Virtual DWO %s %s found: @%s\n",
13391 kind
, hex_string (signature
),
13392 host_address_to_string (dwo_cutu
));
13400 /* No DWP file, look for the DWO file. */
13402 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13403 dwo_name
, comp_dir
);
13404 if (*dwo_file_slot
== NULL
)
13406 /* Read in the file and build a table of the CUs/TUs it contains. */
13407 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13409 /* NOTE: This will be NULL if unable to open the file. */
13410 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13412 if (dwo_file
!= NULL
)
13414 struct dwo_unit
*dwo_cutu
= NULL
;
13416 if (is_debug_types
&& dwo_file
->tus
)
13418 struct dwo_unit find_dwo_cutu
;
13420 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13421 find_dwo_cutu
.signature
= signature
;
13423 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13425 else if (!is_debug_types
&& dwo_file
->cus
)
13427 struct dwo_unit find_dwo_cutu
;
13429 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13430 find_dwo_cutu
.signature
= signature
;
13431 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13435 if (dwo_cutu
!= NULL
)
13437 if (dwarf_read_debug
)
13439 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13440 kind
, dwo_name
, hex_string (signature
),
13441 host_address_to_string (dwo_cutu
));
13448 /* We didn't find it. This could mean a dwo_id mismatch, or
13449 someone deleted the DWO/DWP file, or the search path isn't set up
13450 correctly to find the file. */
13452 if (dwarf_read_debug
)
13454 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13455 kind
, dwo_name
, hex_string (signature
));
13458 /* This is a warning and not a complaint because it can be caused by
13459 pilot error (e.g., user accidentally deleting the DWO). */
13461 /* Print the name of the DWP file if we looked there, helps the user
13462 better diagnose the problem. */
13463 std::string dwp_text
;
13465 if (dwp_file
!= NULL
)
13466 dwp_text
= string_printf (" [in DWP file %s]",
13467 lbasename (dwp_file
->name
));
13469 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13470 " [in module %s]"),
13471 kind
, dwo_name
, hex_string (signature
),
13473 this_unit
->is_debug_types
? "TU" : "CU",
13474 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13479 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13480 See lookup_dwo_cutu_unit for details. */
13482 static struct dwo_unit
*
13483 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13484 const char *dwo_name
, const char *comp_dir
,
13485 ULONGEST signature
)
13487 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13490 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13491 See lookup_dwo_cutu_unit for details. */
13493 static struct dwo_unit
*
13494 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13495 const char *dwo_name
, const char *comp_dir
)
13497 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13500 /* Traversal function for queue_and_load_all_dwo_tus. */
13503 queue_and_load_dwo_tu (void **slot
, void *info
)
13505 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13506 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13507 ULONGEST signature
= dwo_unit
->signature
;
13508 struct signatured_type
*sig_type
=
13509 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13511 if (sig_type
!= NULL
)
13513 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13515 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13516 a real dependency of PER_CU on SIG_TYPE. That is detected later
13517 while processing PER_CU. */
13518 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13519 load_full_type_unit (sig_cu
);
13520 per_cu
->imported_symtabs_push (sig_cu
);
13526 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13527 The DWO may have the only definition of the type, though it may not be
13528 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13529 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13532 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13534 struct dwo_unit
*dwo_unit
;
13535 struct dwo_file
*dwo_file
;
13537 gdb_assert (!per_cu
->is_debug_types
);
13538 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13539 gdb_assert (per_cu
->cu
!= NULL
);
13541 dwo_unit
= per_cu
->cu
->dwo_unit
;
13542 gdb_assert (dwo_unit
!= NULL
);
13544 dwo_file
= dwo_unit
->dwo_file
;
13545 if (dwo_file
->tus
!= NULL
)
13546 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13549 /* Read in various DIEs. */
13551 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13552 Inherit only the children of the DW_AT_abstract_origin DIE not being
13553 already referenced by DW_AT_abstract_origin from the children of the
13557 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13559 struct die_info
*child_die
;
13560 sect_offset
*offsetp
;
13561 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13562 struct die_info
*origin_die
;
13563 /* Iterator of the ORIGIN_DIE children. */
13564 struct die_info
*origin_child_die
;
13565 struct attribute
*attr
;
13566 struct dwarf2_cu
*origin_cu
;
13567 struct pending
**origin_previous_list_in_scope
;
13569 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13573 /* Note that following die references may follow to a die in a
13577 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13579 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13581 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13582 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13584 if (die
->tag
!= origin_die
->tag
13585 && !(die
->tag
== DW_TAG_inlined_subroutine
13586 && origin_die
->tag
== DW_TAG_subprogram
))
13587 complaint (_("DIE %s and its abstract origin %s have different tags"),
13588 sect_offset_str (die
->sect_off
),
13589 sect_offset_str (origin_die
->sect_off
));
13591 std::vector
<sect_offset
> offsets
;
13593 for (child_die
= die
->child
;
13594 child_die
&& child_die
->tag
;
13595 child_die
= sibling_die (child_die
))
13597 struct die_info
*child_origin_die
;
13598 struct dwarf2_cu
*child_origin_cu
;
13600 /* We are trying to process concrete instance entries:
13601 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13602 it's not relevant to our analysis here. i.e. detecting DIEs that are
13603 present in the abstract instance but not referenced in the concrete
13605 if (child_die
->tag
== DW_TAG_call_site
13606 || child_die
->tag
== DW_TAG_GNU_call_site
)
13609 /* For each CHILD_DIE, find the corresponding child of
13610 ORIGIN_DIE. If there is more than one layer of
13611 DW_AT_abstract_origin, follow them all; there shouldn't be,
13612 but GCC versions at least through 4.4 generate this (GCC PR
13614 child_origin_die
= child_die
;
13615 child_origin_cu
= cu
;
13618 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13622 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13626 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13627 counterpart may exist. */
13628 if (child_origin_die
!= child_die
)
13630 if (child_die
->tag
!= child_origin_die
->tag
13631 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13632 && child_origin_die
->tag
== DW_TAG_subprogram
))
13633 complaint (_("Child DIE %s and its abstract origin %s have "
13635 sect_offset_str (child_die
->sect_off
),
13636 sect_offset_str (child_origin_die
->sect_off
));
13637 if (child_origin_die
->parent
!= origin_die
)
13638 complaint (_("Child DIE %s and its abstract origin %s have "
13639 "different parents"),
13640 sect_offset_str (child_die
->sect_off
),
13641 sect_offset_str (child_origin_die
->sect_off
));
13643 offsets
.push_back (child_origin_die
->sect_off
);
13646 std::sort (offsets
.begin (), offsets
.end ());
13647 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13648 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13649 if (offsetp
[-1] == *offsetp
)
13650 complaint (_("Multiple children of DIE %s refer "
13651 "to DIE %s as their abstract origin"),
13652 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13654 offsetp
= offsets
.data ();
13655 origin_child_die
= origin_die
->child
;
13656 while (origin_child_die
&& origin_child_die
->tag
)
13658 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13659 while (offsetp
< offsets_end
13660 && *offsetp
< origin_child_die
->sect_off
)
13662 if (offsetp
>= offsets_end
13663 || *offsetp
> origin_child_die
->sect_off
)
13665 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13666 Check whether we're already processing ORIGIN_CHILD_DIE.
13667 This can happen with mutually referenced abstract_origins.
13669 if (!origin_child_die
->in_process
)
13670 process_die (origin_child_die
, origin_cu
);
13672 origin_child_die
= sibling_die (origin_child_die
);
13674 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13678 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13680 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13681 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13682 struct context_stack
*newobj
;
13685 struct die_info
*child_die
;
13686 struct attribute
*attr
, *call_line
, *call_file
;
13688 CORE_ADDR baseaddr
;
13689 struct block
*block
;
13690 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13691 std::vector
<struct symbol
*> template_args
;
13692 struct template_symbol
*templ_func
= NULL
;
13696 /* If we do not have call site information, we can't show the
13697 caller of this inlined function. That's too confusing, so
13698 only use the scope for local variables. */
13699 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13700 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13701 if (call_line
== NULL
|| call_file
== NULL
)
13703 read_lexical_block_scope (die
, cu
);
13708 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13710 name
= dwarf2_name (die
, cu
);
13712 /* Ignore functions with missing or empty names. These are actually
13713 illegal according to the DWARF standard. */
13716 complaint (_("missing name for subprogram DIE at %s"),
13717 sect_offset_str (die
->sect_off
));
13721 /* Ignore functions with missing or invalid low and high pc attributes. */
13722 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13723 <= PC_BOUNDS_INVALID
)
13725 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13726 if (!attr
|| !DW_UNSND (attr
))
13727 complaint (_("cannot get low and high bounds "
13728 "for subprogram DIE at %s"),
13729 sect_offset_str (die
->sect_off
));
13733 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13734 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13736 /* If we have any template arguments, then we must allocate a
13737 different sort of symbol. */
13738 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13740 if (child_die
->tag
== DW_TAG_template_type_param
13741 || child_die
->tag
== DW_TAG_template_value_param
)
13743 templ_func
= allocate_template_symbol (objfile
);
13744 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13749 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13750 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13751 (struct symbol
*) templ_func
);
13753 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13754 set_objfile_main_name (objfile
, SYMBOL_LINKAGE_NAME (newobj
->name
),
13757 /* If there is a location expression for DW_AT_frame_base, record
13759 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13761 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13763 /* If there is a location for the static link, record it. */
13764 newobj
->static_link
= NULL
;
13765 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13768 newobj
->static_link
13769 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13770 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13771 dwarf2_per_cu_addr_type (cu
->per_cu
));
13774 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13776 if (die
->child
!= NULL
)
13778 child_die
= die
->child
;
13779 while (child_die
&& child_die
->tag
)
13781 if (child_die
->tag
== DW_TAG_template_type_param
13782 || child_die
->tag
== DW_TAG_template_value_param
)
13784 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13787 template_args
.push_back (arg
);
13790 process_die (child_die
, cu
);
13791 child_die
= sibling_die (child_die
);
13795 inherit_abstract_dies (die
, cu
);
13797 /* If we have a DW_AT_specification, we might need to import using
13798 directives from the context of the specification DIE. See the
13799 comment in determine_prefix. */
13800 if (cu
->language
== language_cplus
13801 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13803 struct dwarf2_cu
*spec_cu
= cu
;
13804 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13808 child_die
= spec_die
->child
;
13809 while (child_die
&& child_die
->tag
)
13811 if (child_die
->tag
== DW_TAG_imported_module
)
13812 process_die (child_die
, spec_cu
);
13813 child_die
= sibling_die (child_die
);
13816 /* In some cases, GCC generates specification DIEs that
13817 themselves contain DW_AT_specification attributes. */
13818 spec_die
= die_specification (spec_die
, &spec_cu
);
13822 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13823 /* Make a block for the local symbols within. */
13824 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13825 cstk
.static_link
, lowpc
, highpc
);
13827 /* For C++, set the block's scope. */
13828 if ((cu
->language
== language_cplus
13829 || cu
->language
== language_fortran
13830 || cu
->language
== language_d
13831 || cu
->language
== language_rust
)
13832 && cu
->processing_has_namespace_info
)
13833 block_set_scope (block
, determine_prefix (die
, cu
),
13834 &objfile
->objfile_obstack
);
13836 /* If we have address ranges, record them. */
13837 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13839 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13841 /* Attach template arguments to function. */
13842 if (!template_args
.empty ())
13844 gdb_assert (templ_func
!= NULL
);
13846 templ_func
->n_template_arguments
= template_args
.size ();
13847 templ_func
->template_arguments
13848 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13849 templ_func
->n_template_arguments
);
13850 memcpy (templ_func
->template_arguments
,
13851 template_args
.data (),
13852 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13854 /* Make sure that the symtab is set on the new symbols. Even
13855 though they don't appear in this symtab directly, other parts
13856 of gdb assume that symbols do, and this is reasonably
13858 for (symbol
*sym
: template_args
)
13859 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13862 /* In C++, we can have functions nested inside functions (e.g., when
13863 a function declares a class that has methods). This means that
13864 when we finish processing a function scope, we may need to go
13865 back to building a containing block's symbol lists. */
13866 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13867 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13869 /* If we've finished processing a top-level function, subsequent
13870 symbols go in the file symbol list. */
13871 if (cu
->get_builder ()->outermost_context_p ())
13872 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13875 /* Process all the DIES contained within a lexical block scope. Start
13876 a new scope, process the dies, and then close the scope. */
13879 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13881 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13882 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13883 CORE_ADDR lowpc
, highpc
;
13884 struct die_info
*child_die
;
13885 CORE_ADDR baseaddr
;
13887 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13889 /* Ignore blocks with missing or invalid low and high pc attributes. */
13890 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13891 as multiple lexical blocks? Handling children in a sane way would
13892 be nasty. Might be easier to properly extend generic blocks to
13893 describe ranges. */
13894 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13896 case PC_BOUNDS_NOT_PRESENT
:
13897 /* DW_TAG_lexical_block has no attributes, process its children as if
13898 there was no wrapping by that DW_TAG_lexical_block.
13899 GCC does no longer produces such DWARF since GCC r224161. */
13900 for (child_die
= die
->child
;
13901 child_die
!= NULL
&& child_die
->tag
;
13902 child_die
= sibling_die (child_die
))
13903 process_die (child_die
, cu
);
13905 case PC_BOUNDS_INVALID
:
13908 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13909 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13911 cu
->get_builder ()->push_context (0, lowpc
);
13912 if (die
->child
!= NULL
)
13914 child_die
= die
->child
;
13915 while (child_die
&& child_die
->tag
)
13917 process_die (child_die
, cu
);
13918 child_die
= sibling_die (child_die
);
13921 inherit_abstract_dies (die
, cu
);
13922 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13924 if (*cu
->get_builder ()->get_local_symbols () != NULL
13925 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13927 struct block
*block
13928 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13929 cstk
.start_addr
, highpc
);
13931 /* Note that recording ranges after traversing children, as we
13932 do here, means that recording a parent's ranges entails
13933 walking across all its children's ranges as they appear in
13934 the address map, which is quadratic behavior.
13936 It would be nicer to record the parent's ranges before
13937 traversing its children, simply overriding whatever you find
13938 there. But since we don't even decide whether to create a
13939 block until after we've traversed its children, that's hard
13941 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13943 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13944 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13947 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13950 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13952 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13953 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13954 CORE_ADDR pc
, baseaddr
;
13955 struct attribute
*attr
;
13956 struct call_site
*call_site
, call_site_local
;
13959 struct die_info
*child_die
;
13961 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13963 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13966 /* This was a pre-DWARF-5 GNU extension alias
13967 for DW_AT_call_return_pc. */
13968 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13972 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13973 "DIE %s [in module %s]"),
13974 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13977 pc
= attr_value_as_address (attr
) + baseaddr
;
13978 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13980 if (cu
->call_site_htab
== NULL
)
13981 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13982 NULL
, &objfile
->objfile_obstack
,
13983 hashtab_obstack_allocate
, NULL
);
13984 call_site_local
.pc
= pc
;
13985 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13988 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13989 "DIE %s [in module %s]"),
13990 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13991 objfile_name (objfile
));
13995 /* Count parameters at the caller. */
13998 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13999 child_die
= sibling_die (child_die
))
14001 if (child_die
->tag
!= DW_TAG_call_site_parameter
14002 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14004 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
14005 "DW_TAG_call_site child DIE %s [in module %s]"),
14006 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
14007 objfile_name (objfile
));
14015 = ((struct call_site
*)
14016 obstack_alloc (&objfile
->objfile_obstack
,
14017 sizeof (*call_site
)
14018 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
14020 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
14021 call_site
->pc
= pc
;
14023 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14024 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14026 struct die_info
*func_die
;
14028 /* Skip also over DW_TAG_inlined_subroutine. */
14029 for (func_die
= die
->parent
;
14030 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14031 && func_die
->tag
!= DW_TAG_subroutine_type
;
14032 func_die
= func_die
->parent
);
14034 /* DW_AT_call_all_calls is a superset
14035 of DW_AT_call_all_tail_calls. */
14037 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14038 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14039 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14040 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14042 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14043 not complete. But keep CALL_SITE for look ups via call_site_htab,
14044 both the initial caller containing the real return address PC and
14045 the final callee containing the current PC of a chain of tail
14046 calls do not need to have the tail call list complete. But any
14047 function candidate for a virtual tail call frame searched via
14048 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14049 determined unambiguously. */
14053 struct type
*func_type
= NULL
;
14056 func_type
= get_die_type (func_die
, cu
);
14057 if (func_type
!= NULL
)
14059 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14061 /* Enlist this call site to the function. */
14062 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14063 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14066 complaint (_("Cannot find function owning DW_TAG_call_site "
14067 "DIE %s [in module %s]"),
14068 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14072 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14074 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14076 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14079 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14080 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14082 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14083 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14084 /* Keep NULL DWARF_BLOCK. */;
14085 else if (attr_form_is_block (attr
))
14087 struct dwarf2_locexpr_baton
*dlbaton
;
14089 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14090 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14091 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14092 dlbaton
->per_cu
= cu
->per_cu
;
14094 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14096 else if (attr_form_is_ref (attr
))
14098 struct dwarf2_cu
*target_cu
= cu
;
14099 struct die_info
*target_die
;
14101 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14102 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14103 if (die_is_declaration (target_die
, target_cu
))
14105 const char *target_physname
;
14107 /* Prefer the mangled name; otherwise compute the demangled one. */
14108 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14109 if (target_physname
== NULL
)
14110 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14111 if (target_physname
== NULL
)
14112 complaint (_("DW_AT_call_target target DIE has invalid "
14113 "physname, for referencing DIE %s [in module %s]"),
14114 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14116 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14122 /* DW_AT_entry_pc should be preferred. */
14123 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14124 <= PC_BOUNDS_INVALID
)
14125 complaint (_("DW_AT_call_target target DIE has invalid "
14126 "low pc, for referencing DIE %s [in module %s]"),
14127 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14130 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14131 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14136 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14137 "block nor reference, for DIE %s [in module %s]"),
14138 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14140 call_site
->per_cu
= cu
->per_cu
;
14142 for (child_die
= die
->child
;
14143 child_die
&& child_die
->tag
;
14144 child_die
= sibling_die (child_die
))
14146 struct call_site_parameter
*parameter
;
14147 struct attribute
*loc
, *origin
;
14149 if (child_die
->tag
!= DW_TAG_call_site_parameter
14150 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14152 /* Already printed the complaint above. */
14156 gdb_assert (call_site
->parameter_count
< nparams
);
14157 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14159 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14160 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14161 register is contained in DW_AT_call_value. */
14163 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14164 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14165 if (origin
== NULL
)
14167 /* This was a pre-DWARF-5 GNU extension alias
14168 for DW_AT_call_parameter. */
14169 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14171 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14173 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14175 sect_offset sect_off
14176 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14177 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14179 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14180 binding can be done only inside one CU. Such referenced DIE
14181 therefore cannot be even moved to DW_TAG_partial_unit. */
14182 complaint (_("DW_AT_call_parameter offset is not in CU for "
14183 "DW_TAG_call_site child DIE %s [in module %s]"),
14184 sect_offset_str (child_die
->sect_off
),
14185 objfile_name (objfile
));
14188 parameter
->u
.param_cu_off
14189 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14191 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14193 complaint (_("No DW_FORM_block* DW_AT_location for "
14194 "DW_TAG_call_site child DIE %s [in module %s]"),
14195 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14200 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14201 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14202 if (parameter
->u
.dwarf_reg
!= -1)
14203 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14204 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14205 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14206 ¶meter
->u
.fb_offset
))
14207 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14210 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14211 "for DW_FORM_block* DW_AT_location is supported for "
14212 "DW_TAG_call_site child DIE %s "
14214 sect_offset_str (child_die
->sect_off
),
14215 objfile_name (objfile
));
14220 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14222 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14223 if (!attr_form_is_block (attr
))
14225 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14226 "DW_TAG_call_site child DIE %s [in module %s]"),
14227 sect_offset_str (child_die
->sect_off
),
14228 objfile_name (objfile
));
14231 parameter
->value
= DW_BLOCK (attr
)->data
;
14232 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14234 /* Parameters are not pre-cleared by memset above. */
14235 parameter
->data_value
= NULL
;
14236 parameter
->data_value_size
= 0;
14237 call_site
->parameter_count
++;
14239 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14241 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14244 if (!attr_form_is_block (attr
))
14245 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14246 "DW_TAG_call_site child DIE %s [in module %s]"),
14247 sect_offset_str (child_die
->sect_off
),
14248 objfile_name (objfile
));
14251 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14252 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14258 /* Helper function for read_variable. If DIE represents a virtual
14259 table, then return the type of the concrete object that is
14260 associated with the virtual table. Otherwise, return NULL. */
14262 static struct type
*
14263 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14265 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14269 /* Find the type DIE. */
14270 struct die_info
*type_die
= NULL
;
14271 struct dwarf2_cu
*type_cu
= cu
;
14273 if (attr_form_is_ref (attr
))
14274 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14275 if (type_die
== NULL
)
14278 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14280 return die_containing_type (type_die
, type_cu
);
14283 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14286 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14288 struct rust_vtable_symbol
*storage
= NULL
;
14290 if (cu
->language
== language_rust
)
14292 struct type
*containing_type
= rust_containing_type (die
, cu
);
14294 if (containing_type
!= NULL
)
14296 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14298 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14299 struct rust_vtable_symbol
);
14300 initialize_objfile_symbol (storage
);
14301 storage
->concrete_type
= containing_type
;
14302 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14306 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14307 struct attribute
*abstract_origin
14308 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14309 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14310 if (res
== NULL
&& loc
&& abstract_origin
)
14312 /* We have a variable without a name, but with a location and an abstract
14313 origin. This may be a concrete instance of an abstract variable
14314 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14316 struct dwarf2_cu
*origin_cu
= cu
;
14317 struct die_info
*origin_die
14318 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14319 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
14320 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
14324 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14325 reading .debug_rnglists.
14326 Callback's type should be:
14327 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14328 Return true if the attributes are present and valid, otherwise,
14331 template <typename Callback
>
14333 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14334 Callback
&&callback
)
14336 struct dwarf2_per_objfile
*dwarf2_per_objfile
14337 = cu
->per_cu
->dwarf2_per_objfile
;
14338 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14339 bfd
*obfd
= objfile
->obfd
;
14340 /* Base address selection entry. */
14343 const gdb_byte
*buffer
;
14344 CORE_ADDR baseaddr
;
14345 bool overflow
= false;
14347 found_base
= cu
->base_known
;
14348 base
= cu
->base_address
;
14350 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14351 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14353 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14357 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14359 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14363 /* Initialize it due to a false compiler warning. */
14364 CORE_ADDR range_beginning
= 0, range_end
= 0;
14365 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14366 + dwarf2_per_objfile
->rnglists
.size
);
14367 unsigned int bytes_read
;
14369 if (buffer
== buf_end
)
14374 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14377 case DW_RLE_end_of_list
:
14379 case DW_RLE_base_address
:
14380 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14385 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14387 buffer
+= bytes_read
;
14389 case DW_RLE_start_length
:
14390 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14395 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14396 buffer
+= bytes_read
;
14397 range_end
= (range_beginning
14398 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14399 buffer
+= bytes_read
;
14400 if (buffer
> buf_end
)
14406 case DW_RLE_offset_pair
:
14407 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14408 buffer
+= bytes_read
;
14409 if (buffer
> buf_end
)
14414 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14415 buffer
+= bytes_read
;
14416 if (buffer
> buf_end
)
14422 case DW_RLE_start_end
:
14423 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14428 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14429 buffer
+= bytes_read
;
14430 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14431 buffer
+= bytes_read
;
14434 complaint (_("Invalid .debug_rnglists data (no base address)"));
14437 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14439 if (rlet
== DW_RLE_base_address
)
14444 /* We have no valid base address for the ranges
14446 complaint (_("Invalid .debug_rnglists data (no base address)"));
14450 if (range_beginning
> range_end
)
14452 /* Inverted range entries are invalid. */
14453 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14457 /* Empty range entries have no effect. */
14458 if (range_beginning
== range_end
)
14461 range_beginning
+= base
;
14464 /* A not-uncommon case of bad debug info.
14465 Don't pollute the addrmap with bad data. */
14466 if (range_beginning
+ baseaddr
== 0
14467 && !dwarf2_per_objfile
->has_section_at_zero
)
14469 complaint (_(".debug_rnglists entry has start address of zero"
14470 " [in module %s]"), objfile_name (objfile
));
14474 callback (range_beginning
, range_end
);
14479 complaint (_("Offset %d is not terminated "
14480 "for DW_AT_ranges attribute"),
14488 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14489 Callback's type should be:
14490 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14491 Return 1 if the attributes are present and valid, otherwise, return 0. */
14493 template <typename Callback
>
14495 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14496 Callback
&&callback
)
14498 struct dwarf2_per_objfile
*dwarf2_per_objfile
14499 = cu
->per_cu
->dwarf2_per_objfile
;
14500 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14501 struct comp_unit_head
*cu_header
= &cu
->header
;
14502 bfd
*obfd
= objfile
->obfd
;
14503 unsigned int addr_size
= cu_header
->addr_size
;
14504 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14505 /* Base address selection entry. */
14508 unsigned int dummy
;
14509 const gdb_byte
*buffer
;
14510 CORE_ADDR baseaddr
;
14512 if (cu_header
->version
>= 5)
14513 return dwarf2_rnglists_process (offset
, cu
, callback
);
14515 found_base
= cu
->base_known
;
14516 base
= cu
->base_address
;
14518 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14519 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14521 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14525 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14527 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14531 CORE_ADDR range_beginning
, range_end
;
14533 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14534 buffer
+= addr_size
;
14535 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14536 buffer
+= addr_size
;
14537 offset
+= 2 * addr_size
;
14539 /* An end of list marker is a pair of zero addresses. */
14540 if (range_beginning
== 0 && range_end
== 0)
14541 /* Found the end of list entry. */
14544 /* Each base address selection entry is a pair of 2 values.
14545 The first is the largest possible address, the second is
14546 the base address. Check for a base address here. */
14547 if ((range_beginning
& mask
) == mask
)
14549 /* If we found the largest possible address, then we already
14550 have the base address in range_end. */
14558 /* We have no valid base address for the ranges
14560 complaint (_("Invalid .debug_ranges data (no base address)"));
14564 if (range_beginning
> range_end
)
14566 /* Inverted range entries are invalid. */
14567 complaint (_("Invalid .debug_ranges data (inverted range)"));
14571 /* Empty range entries have no effect. */
14572 if (range_beginning
== range_end
)
14575 range_beginning
+= base
;
14578 /* A not-uncommon case of bad debug info.
14579 Don't pollute the addrmap with bad data. */
14580 if (range_beginning
+ baseaddr
== 0
14581 && !dwarf2_per_objfile
->has_section_at_zero
)
14583 complaint (_(".debug_ranges entry has start address of zero"
14584 " [in module %s]"), objfile_name (objfile
));
14588 callback (range_beginning
, range_end
);
14594 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14595 Return 1 if the attributes are present and valid, otherwise, return 0.
14596 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14599 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14600 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14601 struct partial_symtab
*ranges_pst
)
14603 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14604 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14605 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14606 SECT_OFF_TEXT (objfile
));
14609 CORE_ADDR high
= 0;
14612 retval
= dwarf2_ranges_process (offset
, cu
,
14613 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14615 if (ranges_pst
!= NULL
)
14620 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14621 range_beginning
+ baseaddr
)
14623 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14624 range_end
+ baseaddr
)
14626 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14627 lowpc
, highpc
- 1, ranges_pst
);
14630 /* FIXME: This is recording everything as a low-high
14631 segment of consecutive addresses. We should have a
14632 data structure for discontiguous block ranges
14636 low
= range_beginning
;
14642 if (range_beginning
< low
)
14643 low
= range_beginning
;
14644 if (range_end
> high
)
14652 /* If the first entry is an end-of-list marker, the range
14653 describes an empty scope, i.e. no instructions. */
14659 *high_return
= high
;
14663 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14664 definition for the return value. *LOWPC and *HIGHPC are set iff
14665 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14667 static enum pc_bounds_kind
14668 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14669 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14670 struct partial_symtab
*pst
)
14672 struct dwarf2_per_objfile
*dwarf2_per_objfile
14673 = cu
->per_cu
->dwarf2_per_objfile
;
14674 struct attribute
*attr
;
14675 struct attribute
*attr_high
;
14677 CORE_ADDR high
= 0;
14678 enum pc_bounds_kind ret
;
14680 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14683 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14686 low
= attr_value_as_address (attr
);
14687 high
= attr_value_as_address (attr_high
);
14688 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14692 /* Found high w/o low attribute. */
14693 return PC_BOUNDS_INVALID
;
14695 /* Found consecutive range of addresses. */
14696 ret
= PC_BOUNDS_HIGH_LOW
;
14700 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14703 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14704 We take advantage of the fact that DW_AT_ranges does not appear
14705 in DW_TAG_compile_unit of DWO files. */
14706 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14707 unsigned int ranges_offset
= (DW_UNSND (attr
)
14708 + (need_ranges_base
14712 /* Value of the DW_AT_ranges attribute is the offset in the
14713 .debug_ranges section. */
14714 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14715 return PC_BOUNDS_INVALID
;
14716 /* Found discontinuous range of addresses. */
14717 ret
= PC_BOUNDS_RANGES
;
14720 return PC_BOUNDS_NOT_PRESENT
;
14723 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14725 return PC_BOUNDS_INVALID
;
14727 /* When using the GNU linker, .gnu.linkonce. sections are used to
14728 eliminate duplicate copies of functions and vtables and such.
14729 The linker will arbitrarily choose one and discard the others.
14730 The AT_*_pc values for such functions refer to local labels in
14731 these sections. If the section from that file was discarded, the
14732 labels are not in the output, so the relocs get a value of 0.
14733 If this is a discarded function, mark the pc bounds as invalid,
14734 so that GDB will ignore it. */
14735 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14736 return PC_BOUNDS_INVALID
;
14744 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14745 its low and high PC addresses. Do nothing if these addresses could not
14746 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14747 and HIGHPC to the high address if greater than HIGHPC. */
14750 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14751 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14752 struct dwarf2_cu
*cu
)
14754 CORE_ADDR low
, high
;
14755 struct die_info
*child
= die
->child
;
14757 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14759 *lowpc
= std::min (*lowpc
, low
);
14760 *highpc
= std::max (*highpc
, high
);
14763 /* If the language does not allow nested subprograms (either inside
14764 subprograms or lexical blocks), we're done. */
14765 if (cu
->language
!= language_ada
)
14768 /* Check all the children of the given DIE. If it contains nested
14769 subprograms, then check their pc bounds. Likewise, we need to
14770 check lexical blocks as well, as they may also contain subprogram
14772 while (child
&& child
->tag
)
14774 if (child
->tag
== DW_TAG_subprogram
14775 || child
->tag
== DW_TAG_lexical_block
)
14776 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14777 child
= sibling_die (child
);
14781 /* Get the low and high pc's represented by the scope DIE, and store
14782 them in *LOWPC and *HIGHPC. If the correct values can't be
14783 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14786 get_scope_pc_bounds (struct die_info
*die
,
14787 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14788 struct dwarf2_cu
*cu
)
14790 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14791 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14792 CORE_ADDR current_low
, current_high
;
14794 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14795 >= PC_BOUNDS_RANGES
)
14797 best_low
= current_low
;
14798 best_high
= current_high
;
14802 struct die_info
*child
= die
->child
;
14804 while (child
&& child
->tag
)
14806 switch (child
->tag
) {
14807 case DW_TAG_subprogram
:
14808 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14810 case DW_TAG_namespace
:
14811 case DW_TAG_module
:
14812 /* FIXME: carlton/2004-01-16: Should we do this for
14813 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14814 that current GCC's always emit the DIEs corresponding
14815 to definitions of methods of classes as children of a
14816 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14817 the DIEs giving the declarations, which could be
14818 anywhere). But I don't see any reason why the
14819 standards says that they have to be there. */
14820 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14822 if (current_low
!= ((CORE_ADDR
) -1))
14824 best_low
= std::min (best_low
, current_low
);
14825 best_high
= std::max (best_high
, current_high
);
14833 child
= sibling_die (child
);
14838 *highpc
= best_high
;
14841 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14845 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14846 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14848 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14849 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14850 struct attribute
*attr
;
14851 struct attribute
*attr_high
;
14853 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14856 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14859 CORE_ADDR low
= attr_value_as_address (attr
);
14860 CORE_ADDR high
= attr_value_as_address (attr_high
);
14862 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14865 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14866 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14867 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14871 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14874 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14875 We take advantage of the fact that DW_AT_ranges does not appear
14876 in DW_TAG_compile_unit of DWO files. */
14877 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14879 /* The value of the DW_AT_ranges attribute is the offset of the
14880 address range list in the .debug_ranges section. */
14881 unsigned long offset
= (DW_UNSND (attr
)
14882 + (need_ranges_base
? cu
->ranges_base
: 0));
14884 std::vector
<blockrange
> blockvec
;
14885 dwarf2_ranges_process (offset
, cu
,
14886 [&] (CORE_ADDR start
, CORE_ADDR end
)
14890 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14891 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14892 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14893 blockvec
.emplace_back (start
, end
);
14896 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14900 /* Check whether the producer field indicates either of GCC < 4.6, or the
14901 Intel C/C++ compiler, and cache the result in CU. */
14904 check_producer (struct dwarf2_cu
*cu
)
14908 if (cu
->producer
== NULL
)
14910 /* For unknown compilers expect their behavior is DWARF version
14913 GCC started to support .debug_types sections by -gdwarf-4 since
14914 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14915 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14916 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14917 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14919 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14921 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14922 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14924 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14926 cu
->producer_is_icc
= true;
14927 cu
->producer_is_icc_lt_14
= major
< 14;
14929 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14930 cu
->producer_is_codewarrior
= true;
14933 /* For other non-GCC compilers, expect their behavior is DWARF version
14937 cu
->checked_producer
= true;
14940 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14941 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14942 during 4.6.0 experimental. */
14945 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14947 if (!cu
->checked_producer
)
14948 check_producer (cu
);
14950 return cu
->producer_is_gxx_lt_4_6
;
14954 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14955 with incorrect is_stmt attributes. */
14958 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14960 if (!cu
->checked_producer
)
14961 check_producer (cu
);
14963 return cu
->producer_is_codewarrior
;
14966 /* Return the default accessibility type if it is not overridden by
14967 DW_AT_accessibility. */
14969 static enum dwarf_access_attribute
14970 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14972 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14974 /* The default DWARF 2 accessibility for members is public, the default
14975 accessibility for inheritance is private. */
14977 if (die
->tag
!= DW_TAG_inheritance
)
14978 return DW_ACCESS_public
;
14980 return DW_ACCESS_private
;
14984 /* DWARF 3+ defines the default accessibility a different way. The same
14985 rules apply now for DW_TAG_inheritance as for the members and it only
14986 depends on the container kind. */
14988 if (die
->parent
->tag
== DW_TAG_class_type
)
14989 return DW_ACCESS_private
;
14991 return DW_ACCESS_public
;
14995 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14996 offset. If the attribute was not found return 0, otherwise return
14997 1. If it was found but could not properly be handled, set *OFFSET
15001 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
15004 struct attribute
*attr
;
15006 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
15011 /* Note that we do not check for a section offset first here.
15012 This is because DW_AT_data_member_location is new in DWARF 4,
15013 so if we see it, we can assume that a constant form is really
15014 a constant and not a section offset. */
15015 if (attr_form_is_constant (attr
))
15016 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
15017 else if (attr_form_is_section_offset (attr
))
15018 dwarf2_complex_location_expr_complaint ();
15019 else if (attr_form_is_block (attr
))
15020 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15022 dwarf2_complex_location_expr_complaint ();
15030 /* Add an aggregate field to the field list. */
15033 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15034 struct dwarf2_cu
*cu
)
15036 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15037 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15038 struct nextfield
*new_field
;
15039 struct attribute
*attr
;
15041 const char *fieldname
= "";
15043 if (die
->tag
== DW_TAG_inheritance
)
15045 fip
->baseclasses
.emplace_back ();
15046 new_field
= &fip
->baseclasses
.back ();
15050 fip
->fields
.emplace_back ();
15051 new_field
= &fip
->fields
.back ();
15056 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15058 new_field
->accessibility
= DW_UNSND (attr
);
15060 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15061 if (new_field
->accessibility
!= DW_ACCESS_public
)
15062 fip
->non_public_fields
= 1;
15064 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15066 new_field
->virtuality
= DW_UNSND (attr
);
15068 new_field
->virtuality
= DW_VIRTUALITY_none
;
15070 fp
= &new_field
->field
;
15072 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15076 /* Data member other than a C++ static data member. */
15078 /* Get type of field. */
15079 fp
->type
= die_type (die
, cu
);
15081 SET_FIELD_BITPOS (*fp
, 0);
15083 /* Get bit size of field (zero if none). */
15084 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15087 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15091 FIELD_BITSIZE (*fp
) = 0;
15094 /* Get bit offset of field. */
15095 if (handle_data_member_location (die
, cu
, &offset
))
15096 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15097 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15100 if (gdbarch_bits_big_endian (gdbarch
))
15102 /* For big endian bits, the DW_AT_bit_offset gives the
15103 additional bit offset from the MSB of the containing
15104 anonymous object to the MSB of the field. We don't
15105 have to do anything special since we don't need to
15106 know the size of the anonymous object. */
15107 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15111 /* For little endian bits, compute the bit offset to the
15112 MSB of the anonymous object, subtract off the number of
15113 bits from the MSB of the field to the MSB of the
15114 object, and then subtract off the number of bits of
15115 the field itself. The result is the bit offset of
15116 the LSB of the field. */
15117 int anonymous_size
;
15118 int bit_offset
= DW_UNSND (attr
);
15120 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15123 /* The size of the anonymous object containing
15124 the bit field is explicit, so use the
15125 indicated size (in bytes). */
15126 anonymous_size
= DW_UNSND (attr
);
15130 /* The size of the anonymous object containing
15131 the bit field must be inferred from the type
15132 attribute of the data member containing the
15134 anonymous_size
= TYPE_LENGTH (fp
->type
);
15136 SET_FIELD_BITPOS (*fp
,
15137 (FIELD_BITPOS (*fp
)
15138 + anonymous_size
* bits_per_byte
15139 - bit_offset
- FIELD_BITSIZE (*fp
)));
15142 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15144 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15145 + dwarf2_get_attr_constant_value (attr
, 0)));
15147 /* Get name of field. */
15148 fieldname
= dwarf2_name (die
, cu
);
15149 if (fieldname
== NULL
)
15152 /* The name is already allocated along with this objfile, so we don't
15153 need to duplicate it for the type. */
15154 fp
->name
= fieldname
;
15156 /* Change accessibility for artificial fields (e.g. virtual table
15157 pointer or virtual base class pointer) to private. */
15158 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15160 FIELD_ARTIFICIAL (*fp
) = 1;
15161 new_field
->accessibility
= DW_ACCESS_private
;
15162 fip
->non_public_fields
= 1;
15165 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15167 /* C++ static member. */
15169 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15170 is a declaration, but all versions of G++ as of this writing
15171 (so through at least 3.2.1) incorrectly generate
15172 DW_TAG_variable tags. */
15174 const char *physname
;
15176 /* Get name of field. */
15177 fieldname
= dwarf2_name (die
, cu
);
15178 if (fieldname
== NULL
)
15181 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15183 /* Only create a symbol if this is an external value.
15184 new_symbol checks this and puts the value in the global symbol
15185 table, which we want. If it is not external, new_symbol
15186 will try to put the value in cu->list_in_scope which is wrong. */
15187 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15189 /* A static const member, not much different than an enum as far as
15190 we're concerned, except that we can support more types. */
15191 new_symbol (die
, NULL
, cu
);
15194 /* Get physical name. */
15195 physname
= dwarf2_physname (fieldname
, die
, cu
);
15197 /* The name is already allocated along with this objfile, so we don't
15198 need to duplicate it for the type. */
15199 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15200 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15201 FIELD_NAME (*fp
) = fieldname
;
15203 else if (die
->tag
== DW_TAG_inheritance
)
15207 /* C++ base class field. */
15208 if (handle_data_member_location (die
, cu
, &offset
))
15209 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15210 FIELD_BITSIZE (*fp
) = 0;
15211 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15212 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15214 else if (die
->tag
== DW_TAG_variant_part
)
15216 /* process_structure_scope will treat this DIE as a union. */
15217 process_structure_scope (die
, cu
);
15219 /* The variant part is relative to the start of the enclosing
15221 SET_FIELD_BITPOS (*fp
, 0);
15222 fp
->type
= get_die_type (die
, cu
);
15223 fp
->artificial
= 1;
15224 fp
->name
= "<<variant>>";
15226 /* Normally a DW_TAG_variant_part won't have a size, but our
15227 representation requires one, so set it to the maximum of the
15229 if (TYPE_LENGTH (fp
->type
) == 0)
15232 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
15233 if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)) > max
)
15234 max
= TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
));
15235 TYPE_LENGTH (fp
->type
) = max
;
15239 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15242 /* Can the type given by DIE define another type? */
15245 type_can_define_types (const struct die_info
*die
)
15249 case DW_TAG_typedef
:
15250 case DW_TAG_class_type
:
15251 case DW_TAG_structure_type
:
15252 case DW_TAG_union_type
:
15253 case DW_TAG_enumeration_type
:
15261 /* Add a type definition defined in the scope of the FIP's class. */
15264 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15265 struct dwarf2_cu
*cu
)
15267 struct decl_field fp
;
15268 memset (&fp
, 0, sizeof (fp
));
15270 gdb_assert (type_can_define_types (die
));
15272 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15273 fp
.name
= dwarf2_name (die
, cu
);
15274 fp
.type
= read_type_die (die
, cu
);
15276 /* Save accessibility. */
15277 enum dwarf_access_attribute accessibility
;
15278 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15280 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15282 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15283 switch (accessibility
)
15285 case DW_ACCESS_public
:
15286 /* The assumed value if neither private nor protected. */
15288 case DW_ACCESS_private
:
15291 case DW_ACCESS_protected
:
15292 fp
.is_protected
= 1;
15295 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15298 if (die
->tag
== DW_TAG_typedef
)
15299 fip
->typedef_field_list
.push_back (fp
);
15301 fip
->nested_types_list
.push_back (fp
);
15304 /* Create the vector of fields, and attach it to the type. */
15307 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15308 struct dwarf2_cu
*cu
)
15310 int nfields
= fip
->nfields
;
15312 /* Record the field count, allocate space for the array of fields,
15313 and create blank accessibility bitfields if necessary. */
15314 TYPE_NFIELDS (type
) = nfields
;
15315 TYPE_FIELDS (type
) = (struct field
*)
15316 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15318 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15320 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15322 TYPE_FIELD_PRIVATE_BITS (type
) =
15323 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15324 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15326 TYPE_FIELD_PROTECTED_BITS (type
) =
15327 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15328 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15330 TYPE_FIELD_IGNORE_BITS (type
) =
15331 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15332 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15335 /* If the type has baseclasses, allocate and clear a bit vector for
15336 TYPE_FIELD_VIRTUAL_BITS. */
15337 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15339 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15340 unsigned char *pointer
;
15342 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15343 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15344 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15345 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15346 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15349 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15351 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15353 for (int index
= 0; index
< nfields
; ++index
)
15355 struct nextfield
&field
= fip
->fields
[index
];
15357 if (field
.variant
.is_discriminant
)
15358 di
->discriminant_index
= index
;
15359 else if (field
.variant
.default_branch
)
15360 di
->default_index
= index
;
15362 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15366 /* Copy the saved-up fields into the field vector. */
15367 for (int i
= 0; i
< nfields
; ++i
)
15369 struct nextfield
&field
15370 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15371 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15373 TYPE_FIELD (type
, i
) = field
.field
;
15374 switch (field
.accessibility
)
15376 case DW_ACCESS_private
:
15377 if (cu
->language
!= language_ada
)
15378 SET_TYPE_FIELD_PRIVATE (type
, i
);
15381 case DW_ACCESS_protected
:
15382 if (cu
->language
!= language_ada
)
15383 SET_TYPE_FIELD_PROTECTED (type
, i
);
15386 case DW_ACCESS_public
:
15390 /* Unknown accessibility. Complain and treat it as public. */
15392 complaint (_("unsupported accessibility %d"),
15393 field
.accessibility
);
15397 if (i
< fip
->baseclasses
.size ())
15399 switch (field
.virtuality
)
15401 case DW_VIRTUALITY_virtual
:
15402 case DW_VIRTUALITY_pure_virtual
:
15403 if (cu
->language
== language_ada
)
15404 error (_("unexpected virtuality in component of Ada type"));
15405 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15412 /* Return true if this member function is a constructor, false
15416 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15418 const char *fieldname
;
15419 const char *type_name
;
15422 if (die
->parent
== NULL
)
15425 if (die
->parent
->tag
!= DW_TAG_structure_type
15426 && die
->parent
->tag
!= DW_TAG_union_type
15427 && die
->parent
->tag
!= DW_TAG_class_type
)
15430 fieldname
= dwarf2_name (die
, cu
);
15431 type_name
= dwarf2_name (die
->parent
, cu
);
15432 if (fieldname
== NULL
|| type_name
== NULL
)
15435 len
= strlen (fieldname
);
15436 return (strncmp (fieldname
, type_name
, len
) == 0
15437 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15440 /* Add a member function to the proper fieldlist. */
15443 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15444 struct type
*type
, struct dwarf2_cu
*cu
)
15446 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15447 struct attribute
*attr
;
15449 struct fnfieldlist
*flp
= nullptr;
15450 struct fn_field
*fnp
;
15451 const char *fieldname
;
15452 struct type
*this_type
;
15453 enum dwarf_access_attribute accessibility
;
15455 if (cu
->language
== language_ada
)
15456 error (_("unexpected member function in Ada type"));
15458 /* Get name of member function. */
15459 fieldname
= dwarf2_name (die
, cu
);
15460 if (fieldname
== NULL
)
15463 /* Look up member function name in fieldlist. */
15464 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15466 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15468 flp
= &fip
->fnfieldlists
[i
];
15473 /* Create a new fnfieldlist if necessary. */
15474 if (flp
== nullptr)
15476 fip
->fnfieldlists
.emplace_back ();
15477 flp
= &fip
->fnfieldlists
.back ();
15478 flp
->name
= fieldname
;
15479 i
= fip
->fnfieldlists
.size () - 1;
15482 /* Create a new member function field and add it to the vector of
15484 flp
->fnfields
.emplace_back ();
15485 fnp
= &flp
->fnfields
.back ();
15487 /* Delay processing of the physname until later. */
15488 if (cu
->language
== language_cplus
)
15489 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15493 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15494 fnp
->physname
= physname
? physname
: "";
15497 fnp
->type
= alloc_type (objfile
);
15498 this_type
= read_type_die (die
, cu
);
15499 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15501 int nparams
= TYPE_NFIELDS (this_type
);
15503 /* TYPE is the domain of this method, and THIS_TYPE is the type
15504 of the method itself (TYPE_CODE_METHOD). */
15505 smash_to_method_type (fnp
->type
, type
,
15506 TYPE_TARGET_TYPE (this_type
),
15507 TYPE_FIELDS (this_type
),
15508 TYPE_NFIELDS (this_type
),
15509 TYPE_VARARGS (this_type
));
15511 /* Handle static member functions.
15512 Dwarf2 has no clean way to discern C++ static and non-static
15513 member functions. G++ helps GDB by marking the first
15514 parameter for non-static member functions (which is the this
15515 pointer) as artificial. We obtain this information from
15516 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15517 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15518 fnp
->voffset
= VOFFSET_STATIC
;
15521 complaint (_("member function type missing for '%s'"),
15522 dwarf2_full_name (fieldname
, die
, cu
));
15524 /* Get fcontext from DW_AT_containing_type if present. */
15525 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15526 fnp
->fcontext
= die_containing_type (die
, cu
);
15528 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15529 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15531 /* Get accessibility. */
15532 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15534 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15536 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15537 switch (accessibility
)
15539 case DW_ACCESS_private
:
15540 fnp
->is_private
= 1;
15542 case DW_ACCESS_protected
:
15543 fnp
->is_protected
= 1;
15547 /* Check for artificial methods. */
15548 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15549 if (attr
&& DW_UNSND (attr
) != 0)
15550 fnp
->is_artificial
= 1;
15552 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15554 /* Get index in virtual function table if it is a virtual member
15555 function. For older versions of GCC, this is an offset in the
15556 appropriate virtual table, as specified by DW_AT_containing_type.
15557 For everyone else, it is an expression to be evaluated relative
15558 to the object address. */
15560 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15563 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15565 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15567 /* Old-style GCC. */
15568 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15570 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15571 || (DW_BLOCK (attr
)->size
> 1
15572 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15573 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15575 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15576 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15577 dwarf2_complex_location_expr_complaint ();
15579 fnp
->voffset
/= cu
->header
.addr_size
;
15583 dwarf2_complex_location_expr_complaint ();
15585 if (!fnp
->fcontext
)
15587 /* If there is no `this' field and no DW_AT_containing_type,
15588 we cannot actually find a base class context for the
15590 if (TYPE_NFIELDS (this_type
) == 0
15591 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15593 complaint (_("cannot determine context for virtual member "
15594 "function \"%s\" (offset %s)"),
15595 fieldname
, sect_offset_str (die
->sect_off
));
15600 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15604 else if (attr_form_is_section_offset (attr
))
15606 dwarf2_complex_location_expr_complaint ();
15610 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15616 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15617 if (attr
&& DW_UNSND (attr
))
15619 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15620 complaint (_("Member function \"%s\" (offset %s) is virtual "
15621 "but the vtable offset is not specified"),
15622 fieldname
, sect_offset_str (die
->sect_off
));
15623 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15624 TYPE_CPLUS_DYNAMIC (type
) = 1;
15629 /* Create the vector of member function fields, and attach it to the type. */
15632 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15633 struct dwarf2_cu
*cu
)
15635 if (cu
->language
== language_ada
)
15636 error (_("unexpected member functions in Ada type"));
15638 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15639 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15641 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15643 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15645 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15646 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15648 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15649 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15650 fn_flp
->fn_fields
= (struct fn_field
*)
15651 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15653 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15654 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15657 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15660 /* Returns non-zero if NAME is the name of a vtable member in CU's
15661 language, zero otherwise. */
15663 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15665 static const char vptr
[] = "_vptr";
15667 /* Look for the C++ form of the vtable. */
15668 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15674 /* GCC outputs unnamed structures that are really pointers to member
15675 functions, with the ABI-specified layout. If TYPE describes
15676 such a structure, smash it into a member function type.
15678 GCC shouldn't do this; it should just output pointer to member DIEs.
15679 This is GCC PR debug/28767. */
15682 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15684 struct type
*pfn_type
, *self_type
, *new_type
;
15686 /* Check for a structure with no name and two children. */
15687 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15690 /* Check for __pfn and __delta members. */
15691 if (TYPE_FIELD_NAME (type
, 0) == NULL
15692 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15693 || TYPE_FIELD_NAME (type
, 1) == NULL
15694 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15697 /* Find the type of the method. */
15698 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15699 if (pfn_type
== NULL
15700 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15701 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15704 /* Look for the "this" argument. */
15705 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15706 if (TYPE_NFIELDS (pfn_type
) == 0
15707 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15708 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15711 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15712 new_type
= alloc_type (objfile
);
15713 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15714 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15715 TYPE_VARARGS (pfn_type
));
15716 smash_to_methodptr_type (type
, new_type
);
15719 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15720 appropriate error checking and issuing complaints if there is a
15724 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15726 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15728 if (attr
== nullptr)
15731 if (!attr_form_is_constant (attr
))
15733 complaint (_("DW_AT_alignment must have constant form"
15734 " - DIE at %s [in module %s]"),
15735 sect_offset_str (die
->sect_off
),
15736 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15741 if (attr
->form
== DW_FORM_sdata
)
15743 LONGEST val
= DW_SND (attr
);
15746 complaint (_("DW_AT_alignment value must not be negative"
15747 " - DIE at %s [in module %s]"),
15748 sect_offset_str (die
->sect_off
),
15749 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15755 align
= DW_UNSND (attr
);
15759 complaint (_("DW_AT_alignment value must not be zero"
15760 " - DIE at %s [in module %s]"),
15761 sect_offset_str (die
->sect_off
),
15762 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15765 if ((align
& (align
- 1)) != 0)
15767 complaint (_("DW_AT_alignment value must be a power of 2"
15768 " - DIE at %s [in module %s]"),
15769 sect_offset_str (die
->sect_off
),
15770 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15777 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15778 the alignment for TYPE. */
15781 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15784 if (!set_type_align (type
, get_alignment (cu
, die
)))
15785 complaint (_("DW_AT_alignment value too large"
15786 " - DIE at %s [in module %s]"),
15787 sect_offset_str (die
->sect_off
),
15788 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15791 /* Called when we find the DIE that starts a structure or union scope
15792 (definition) to create a type for the structure or union. Fill in
15793 the type's name and general properties; the members will not be
15794 processed until process_structure_scope. A symbol table entry for
15795 the type will also not be done until process_structure_scope (assuming
15796 the type has a name).
15798 NOTE: we need to call these functions regardless of whether or not the
15799 DIE has a DW_AT_name attribute, since it might be an anonymous
15800 structure or union. This gets the type entered into our set of
15801 user defined types. */
15803 static struct type
*
15804 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15806 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15808 struct attribute
*attr
;
15811 /* If the definition of this type lives in .debug_types, read that type.
15812 Don't follow DW_AT_specification though, that will take us back up
15813 the chain and we want to go down. */
15814 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15817 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15819 /* The type's CU may not be the same as CU.
15820 Ensure TYPE is recorded with CU in die_type_hash. */
15821 return set_die_type (die
, type
, cu
);
15824 type
= alloc_type (objfile
);
15825 INIT_CPLUS_SPECIFIC (type
);
15827 name
= dwarf2_name (die
, cu
);
15830 if (cu
->language
== language_cplus
15831 || cu
->language
== language_d
15832 || cu
->language
== language_rust
)
15834 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15836 /* dwarf2_full_name might have already finished building the DIE's
15837 type. If so, there is no need to continue. */
15838 if (get_die_type (die
, cu
) != NULL
)
15839 return get_die_type (die
, cu
);
15841 TYPE_NAME (type
) = full_name
;
15845 /* The name is already allocated along with this objfile, so
15846 we don't need to duplicate it for the type. */
15847 TYPE_NAME (type
) = name
;
15851 if (die
->tag
== DW_TAG_structure_type
)
15853 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15855 else if (die
->tag
== DW_TAG_union_type
)
15857 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15859 else if (die
->tag
== DW_TAG_variant_part
)
15861 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15862 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15866 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15869 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15870 TYPE_DECLARED_CLASS (type
) = 1;
15872 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15875 if (attr_form_is_constant (attr
))
15876 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15879 /* For the moment, dynamic type sizes are not supported
15880 by GDB's struct type. The actual size is determined
15881 on-demand when resolving the type of a given object,
15882 so set the type's length to zero for now. Otherwise,
15883 we record an expression as the length, and that expression
15884 could lead to a very large value, which could eventually
15885 lead to us trying to allocate that much memory when creating
15886 a value of that type. */
15887 TYPE_LENGTH (type
) = 0;
15892 TYPE_LENGTH (type
) = 0;
15895 maybe_set_alignment (cu
, die
, type
);
15897 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15899 /* ICC<14 does not output the required DW_AT_declaration on
15900 incomplete types, but gives them a size of zero. */
15901 TYPE_STUB (type
) = 1;
15904 TYPE_STUB_SUPPORTED (type
) = 1;
15906 if (die_is_declaration (die
, cu
))
15907 TYPE_STUB (type
) = 1;
15908 else if (attr
== NULL
&& die
->child
== NULL
15909 && producer_is_realview (cu
->producer
))
15910 /* RealView does not output the required DW_AT_declaration
15911 on incomplete types. */
15912 TYPE_STUB (type
) = 1;
15914 /* We need to add the type field to the die immediately so we don't
15915 infinitely recurse when dealing with pointers to the structure
15916 type within the structure itself. */
15917 set_die_type (die
, type
, cu
);
15919 /* set_die_type should be already done. */
15920 set_descriptive_type (type
, die
, cu
);
15925 /* A helper for process_structure_scope that handles a single member
15929 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15930 struct field_info
*fi
,
15931 std::vector
<struct symbol
*> *template_args
,
15932 struct dwarf2_cu
*cu
)
15934 if (child_die
->tag
== DW_TAG_member
15935 || child_die
->tag
== DW_TAG_variable
15936 || child_die
->tag
== DW_TAG_variant_part
)
15938 /* NOTE: carlton/2002-11-05: A C++ static data member
15939 should be a DW_TAG_member that is a declaration, but
15940 all versions of G++ as of this writing (so through at
15941 least 3.2.1) incorrectly generate DW_TAG_variable
15942 tags for them instead. */
15943 dwarf2_add_field (fi
, child_die
, cu
);
15945 else if (child_die
->tag
== DW_TAG_subprogram
)
15947 /* Rust doesn't have member functions in the C++ sense.
15948 However, it does emit ordinary functions as children
15949 of a struct DIE. */
15950 if (cu
->language
== language_rust
)
15951 read_func_scope (child_die
, cu
);
15954 /* C++ member function. */
15955 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15958 else if (child_die
->tag
== DW_TAG_inheritance
)
15960 /* C++ base class field. */
15961 dwarf2_add_field (fi
, child_die
, cu
);
15963 else if (type_can_define_types (child_die
))
15964 dwarf2_add_type_defn (fi
, child_die
, cu
);
15965 else if (child_die
->tag
== DW_TAG_template_type_param
15966 || child_die
->tag
== DW_TAG_template_value_param
)
15968 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15971 template_args
->push_back (arg
);
15973 else if (child_die
->tag
== DW_TAG_variant
)
15975 /* In a variant we want to get the discriminant and also add a
15976 field for our sole member child. */
15977 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15979 for (die_info
*variant_child
= child_die
->child
;
15980 variant_child
!= NULL
;
15981 variant_child
= sibling_die (variant_child
))
15983 if (variant_child
->tag
== DW_TAG_member
)
15985 handle_struct_member_die (variant_child
, type
, fi
,
15986 template_args
, cu
);
15987 /* Only handle the one. */
15992 /* We don't handle this but we might as well report it if we see
15994 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15995 complaint (_("DW_AT_discr_list is not supported yet"
15996 " - DIE at %s [in module %s]"),
15997 sect_offset_str (child_die
->sect_off
),
15998 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16000 /* The first field was just added, so we can stash the
16001 discriminant there. */
16002 gdb_assert (!fi
->fields
.empty ());
16004 fi
->fields
.back ().variant
.default_branch
= true;
16006 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
16010 /* Finish creating a structure or union type, including filling in
16011 its members and creating a symbol for it. */
16014 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16016 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16017 struct die_info
*child_die
;
16020 type
= get_die_type (die
, cu
);
16022 type
= read_structure_type (die
, cu
);
16024 /* When reading a DW_TAG_variant_part, we need to notice when we
16025 read the discriminant member, so we can record it later in the
16026 discriminant_info. */
16027 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
16028 sect_offset discr_offset
;
16029 bool has_template_parameters
= false;
16031 if (is_variant_part
)
16033 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16036 /* Maybe it's a univariant form, an extension we support.
16037 In this case arrange not to check the offset. */
16038 is_variant_part
= false;
16040 else if (attr_form_is_ref (discr
))
16042 struct dwarf2_cu
*target_cu
= cu
;
16043 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16045 discr_offset
= target_die
->sect_off
;
16049 complaint (_("DW_AT_discr does not have DIE reference form"
16050 " - DIE at %s [in module %s]"),
16051 sect_offset_str (die
->sect_off
),
16052 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16053 is_variant_part
= false;
16057 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16059 struct field_info fi
;
16060 std::vector
<struct symbol
*> template_args
;
16062 child_die
= die
->child
;
16064 while (child_die
&& child_die
->tag
)
16066 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16068 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
16069 fi
.fields
.back ().variant
.is_discriminant
= true;
16071 child_die
= sibling_die (child_die
);
16074 /* Attach template arguments to type. */
16075 if (!template_args
.empty ())
16077 has_template_parameters
= true;
16078 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16079 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16080 TYPE_TEMPLATE_ARGUMENTS (type
)
16081 = XOBNEWVEC (&objfile
->objfile_obstack
,
16083 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16084 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16085 template_args
.data (),
16086 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16087 * sizeof (struct symbol
*)));
16090 /* Attach fields and member functions to the type. */
16092 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16093 if (!fi
.fnfieldlists
.empty ())
16095 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16097 /* Get the type which refers to the base class (possibly this
16098 class itself) which contains the vtable pointer for the current
16099 class from the DW_AT_containing_type attribute. This use of
16100 DW_AT_containing_type is a GNU extension. */
16102 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16104 struct type
*t
= die_containing_type (die
, cu
);
16106 set_type_vptr_basetype (type
, t
);
16111 /* Our own class provides vtbl ptr. */
16112 for (i
= TYPE_NFIELDS (t
) - 1;
16113 i
>= TYPE_N_BASECLASSES (t
);
16116 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16118 if (is_vtable_name (fieldname
, cu
))
16120 set_type_vptr_fieldno (type
, i
);
16125 /* Complain if virtual function table field not found. */
16126 if (i
< TYPE_N_BASECLASSES (t
))
16127 complaint (_("virtual function table pointer "
16128 "not found when defining class '%s'"),
16129 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
16133 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16136 else if (cu
->producer
16137 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16139 /* The IBM XLC compiler does not provide direct indication
16140 of the containing type, but the vtable pointer is
16141 always named __vfp. */
16145 for (i
= TYPE_NFIELDS (type
) - 1;
16146 i
>= TYPE_N_BASECLASSES (type
);
16149 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16151 set_type_vptr_fieldno (type
, i
);
16152 set_type_vptr_basetype (type
, type
);
16159 /* Copy fi.typedef_field_list linked list elements content into the
16160 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16161 if (!fi
.typedef_field_list
.empty ())
16163 int count
= fi
.typedef_field_list
.size ();
16165 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16166 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16167 = ((struct decl_field
*)
16169 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16170 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16172 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16173 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16176 /* Copy fi.nested_types_list linked list elements content into the
16177 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16178 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16180 int count
= fi
.nested_types_list
.size ();
16182 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16183 TYPE_NESTED_TYPES_ARRAY (type
)
16184 = ((struct decl_field
*)
16185 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16186 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16188 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16189 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16193 quirk_gcc_member_function_pointer (type
, objfile
);
16194 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16195 cu
->rust_unions
.push_back (type
);
16197 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16198 snapshots) has been known to create a die giving a declaration
16199 for a class that has, as a child, a die giving a definition for a
16200 nested class. So we have to process our children even if the
16201 current die is a declaration. Normally, of course, a declaration
16202 won't have any children at all. */
16204 child_die
= die
->child
;
16206 while (child_die
!= NULL
&& child_die
->tag
)
16208 if (child_die
->tag
== DW_TAG_member
16209 || child_die
->tag
== DW_TAG_variable
16210 || child_die
->tag
== DW_TAG_inheritance
16211 || child_die
->tag
== DW_TAG_template_value_param
16212 || child_die
->tag
== DW_TAG_template_type_param
)
16217 process_die (child_die
, cu
);
16219 child_die
= sibling_die (child_die
);
16222 /* Do not consider external references. According to the DWARF standard,
16223 these DIEs are identified by the fact that they have no byte_size
16224 attribute, and a declaration attribute. */
16225 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16226 || !die_is_declaration (die
, cu
))
16228 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16230 if (has_template_parameters
)
16232 struct symtab
*symtab
;
16233 if (sym
!= nullptr)
16234 symtab
= symbol_symtab (sym
);
16235 else if (cu
->line_header
!= nullptr)
16237 /* Any related symtab will do. */
16239 = cu
->line_header
->file_names ()[0].symtab
;
16244 complaint (_("could not find suitable "
16245 "symtab for template parameter"
16246 " - DIE at %s [in module %s]"),
16247 sect_offset_str (die
->sect_off
),
16248 objfile_name (objfile
));
16251 if (symtab
!= nullptr)
16253 /* Make sure that the symtab is set on the new symbols.
16254 Even though they don't appear in this symtab directly,
16255 other parts of gdb assume that symbols do, and this is
16256 reasonably true. */
16257 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16258 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16264 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16265 update TYPE using some information only available in DIE's children. */
16268 update_enumeration_type_from_children (struct die_info
*die
,
16270 struct dwarf2_cu
*cu
)
16272 struct die_info
*child_die
;
16273 int unsigned_enum
= 1;
16277 auto_obstack obstack
;
16279 for (child_die
= die
->child
;
16280 child_die
!= NULL
&& child_die
->tag
;
16281 child_die
= sibling_die (child_die
))
16283 struct attribute
*attr
;
16285 const gdb_byte
*bytes
;
16286 struct dwarf2_locexpr_baton
*baton
;
16289 if (child_die
->tag
!= DW_TAG_enumerator
)
16292 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16296 name
= dwarf2_name (child_die
, cu
);
16298 name
= "<anonymous enumerator>";
16300 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16301 &value
, &bytes
, &baton
);
16307 else if ((mask
& value
) != 0)
16312 /* If we already know that the enum type is neither unsigned, nor
16313 a flag type, no need to look at the rest of the enumerates. */
16314 if (!unsigned_enum
&& !flag_enum
)
16319 TYPE_UNSIGNED (type
) = 1;
16321 TYPE_FLAG_ENUM (type
) = 1;
16324 /* Given a DW_AT_enumeration_type die, set its type. We do not
16325 complete the type's fields yet, or create any symbols. */
16327 static struct type
*
16328 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16330 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16332 struct attribute
*attr
;
16335 /* If the definition of this type lives in .debug_types, read that type.
16336 Don't follow DW_AT_specification though, that will take us back up
16337 the chain and we want to go down. */
16338 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16341 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16343 /* The type's CU may not be the same as CU.
16344 Ensure TYPE is recorded with CU in die_type_hash. */
16345 return set_die_type (die
, type
, cu
);
16348 type
= alloc_type (objfile
);
16350 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16351 name
= dwarf2_full_name (NULL
, die
, cu
);
16353 TYPE_NAME (type
) = name
;
16355 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16358 struct type
*underlying_type
= die_type (die
, cu
);
16360 TYPE_TARGET_TYPE (type
) = underlying_type
;
16363 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16366 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16370 TYPE_LENGTH (type
) = 0;
16373 maybe_set_alignment (cu
, die
, type
);
16375 /* The enumeration DIE can be incomplete. In Ada, any type can be
16376 declared as private in the package spec, and then defined only
16377 inside the package body. Such types are known as Taft Amendment
16378 Types. When another package uses such a type, an incomplete DIE
16379 may be generated by the compiler. */
16380 if (die_is_declaration (die
, cu
))
16381 TYPE_STUB (type
) = 1;
16383 /* Finish the creation of this type by using the enum's children.
16384 We must call this even when the underlying type has been provided
16385 so that we can determine if we're looking at a "flag" enum. */
16386 update_enumeration_type_from_children (die
, type
, cu
);
16388 /* If this type has an underlying type that is not a stub, then we
16389 may use its attributes. We always use the "unsigned" attribute
16390 in this situation, because ordinarily we guess whether the type
16391 is unsigned -- but the guess can be wrong and the underlying type
16392 can tell us the reality. However, we defer to a local size
16393 attribute if one exists, because this lets the compiler override
16394 the underlying type if needed. */
16395 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16397 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16398 if (TYPE_LENGTH (type
) == 0)
16399 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16400 if (TYPE_RAW_ALIGN (type
) == 0
16401 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16402 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16405 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16407 return set_die_type (die
, type
, cu
);
16410 /* Given a pointer to a die which begins an enumeration, process all
16411 the dies that define the members of the enumeration, and create the
16412 symbol for the enumeration type.
16414 NOTE: We reverse the order of the element list. */
16417 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16419 struct type
*this_type
;
16421 this_type
= get_die_type (die
, cu
);
16422 if (this_type
== NULL
)
16423 this_type
= read_enumeration_type (die
, cu
);
16425 if (die
->child
!= NULL
)
16427 struct die_info
*child_die
;
16428 struct symbol
*sym
;
16429 struct field
*fields
= NULL
;
16430 int num_fields
= 0;
16433 child_die
= die
->child
;
16434 while (child_die
&& child_die
->tag
)
16436 if (child_die
->tag
!= DW_TAG_enumerator
)
16438 process_die (child_die
, cu
);
16442 name
= dwarf2_name (child_die
, cu
);
16445 sym
= new_symbol (child_die
, this_type
, cu
);
16447 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16449 fields
= (struct field
*)
16451 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16452 * sizeof (struct field
));
16455 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16456 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16457 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16458 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16464 child_die
= sibling_die (child_die
);
16469 TYPE_NFIELDS (this_type
) = num_fields
;
16470 TYPE_FIELDS (this_type
) = (struct field
*)
16471 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16472 memcpy (TYPE_FIELDS (this_type
), fields
,
16473 sizeof (struct field
) * num_fields
);
16478 /* If we are reading an enum from a .debug_types unit, and the enum
16479 is a declaration, and the enum is not the signatured type in the
16480 unit, then we do not want to add a symbol for it. Adding a
16481 symbol would in some cases obscure the true definition of the
16482 enum, giving users an incomplete type when the definition is
16483 actually available. Note that we do not want to do this for all
16484 enums which are just declarations, because C++0x allows forward
16485 enum declarations. */
16486 if (cu
->per_cu
->is_debug_types
16487 && die_is_declaration (die
, cu
))
16489 struct signatured_type
*sig_type
;
16491 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16492 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16493 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16497 new_symbol (die
, this_type
, cu
);
16500 /* Extract all information from a DW_TAG_array_type DIE and put it in
16501 the DIE's type field. For now, this only handles one dimensional
16504 static struct type
*
16505 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16507 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16508 struct die_info
*child_die
;
16510 struct type
*element_type
, *range_type
, *index_type
;
16511 struct attribute
*attr
;
16513 struct dynamic_prop
*byte_stride_prop
= NULL
;
16514 unsigned int bit_stride
= 0;
16516 element_type
= die_type (die
, cu
);
16518 /* The die_type call above may have already set the type for this DIE. */
16519 type
= get_die_type (die
, cu
);
16523 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16527 struct type
*prop_type
16528 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
16531 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16532 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16536 complaint (_("unable to read array DW_AT_byte_stride "
16537 " - DIE at %s [in module %s]"),
16538 sect_offset_str (die
->sect_off
),
16539 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16540 /* Ignore this attribute. We will likely not be able to print
16541 arrays of this type correctly, but there is little we can do
16542 to help if we cannot read the attribute's value. */
16543 byte_stride_prop
= NULL
;
16547 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16549 bit_stride
= DW_UNSND (attr
);
16551 /* Irix 6.2 native cc creates array types without children for
16552 arrays with unspecified length. */
16553 if (die
->child
== NULL
)
16555 index_type
= objfile_type (objfile
)->builtin_int
;
16556 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16557 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16558 byte_stride_prop
, bit_stride
);
16559 return set_die_type (die
, type
, cu
);
16562 std::vector
<struct type
*> range_types
;
16563 child_die
= die
->child
;
16564 while (child_die
&& child_die
->tag
)
16566 if (child_die
->tag
== DW_TAG_subrange_type
)
16568 struct type
*child_type
= read_type_die (child_die
, cu
);
16570 if (child_type
!= NULL
)
16572 /* The range type was succesfully read. Save it for the
16573 array type creation. */
16574 range_types
.push_back (child_type
);
16577 child_die
= sibling_die (child_die
);
16580 /* Dwarf2 dimensions are output from left to right, create the
16581 necessary array types in backwards order. */
16583 type
= element_type
;
16585 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16589 while (i
< range_types
.size ())
16590 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16591 byte_stride_prop
, bit_stride
);
16595 size_t ndim
= range_types
.size ();
16597 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16598 byte_stride_prop
, bit_stride
);
16601 /* Understand Dwarf2 support for vector types (like they occur on
16602 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16603 array type. This is not part of the Dwarf2/3 standard yet, but a
16604 custom vendor extension. The main difference between a regular
16605 array and the vector variant is that vectors are passed by value
16607 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16609 make_vector_type (type
);
16611 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16612 implementation may choose to implement triple vectors using this
16614 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16617 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16618 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16620 complaint (_("DW_AT_byte_size for array type smaller "
16621 "than the total size of elements"));
16624 name
= dwarf2_name (die
, cu
);
16626 TYPE_NAME (type
) = name
;
16628 maybe_set_alignment (cu
, die
, type
);
16630 /* Install the type in the die. */
16631 set_die_type (die
, type
, cu
);
16633 /* set_die_type should be already done. */
16634 set_descriptive_type (type
, die
, cu
);
16639 static enum dwarf_array_dim_ordering
16640 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16642 struct attribute
*attr
;
16644 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16647 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16649 /* GNU F77 is a special case, as at 08/2004 array type info is the
16650 opposite order to the dwarf2 specification, but data is still
16651 laid out as per normal fortran.
16653 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16654 version checking. */
16656 if (cu
->language
== language_fortran
16657 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16659 return DW_ORD_row_major
;
16662 switch (cu
->language_defn
->la_array_ordering
)
16664 case array_column_major
:
16665 return DW_ORD_col_major
;
16666 case array_row_major
:
16668 return DW_ORD_row_major
;
16672 /* Extract all information from a DW_TAG_set_type DIE and put it in
16673 the DIE's type field. */
16675 static struct type
*
16676 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16678 struct type
*domain_type
, *set_type
;
16679 struct attribute
*attr
;
16681 domain_type
= die_type (die
, cu
);
16683 /* The die_type call above may have already set the type for this DIE. */
16684 set_type
= get_die_type (die
, cu
);
16688 set_type
= create_set_type (NULL
, domain_type
);
16690 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16692 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16694 maybe_set_alignment (cu
, die
, set_type
);
16696 return set_die_type (die
, set_type
, cu
);
16699 /* A helper for read_common_block that creates a locexpr baton.
16700 SYM is the symbol which we are marking as computed.
16701 COMMON_DIE is the DIE for the common block.
16702 COMMON_LOC is the location expression attribute for the common
16704 MEMBER_LOC is the location expression attribute for the particular
16705 member of the common block that we are processing.
16706 CU is the CU from which the above come. */
16709 mark_common_block_symbol_computed (struct symbol
*sym
,
16710 struct die_info
*common_die
,
16711 struct attribute
*common_loc
,
16712 struct attribute
*member_loc
,
16713 struct dwarf2_cu
*cu
)
16715 struct dwarf2_per_objfile
*dwarf2_per_objfile
16716 = cu
->per_cu
->dwarf2_per_objfile
;
16717 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16718 struct dwarf2_locexpr_baton
*baton
;
16720 unsigned int cu_off
;
16721 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16722 LONGEST offset
= 0;
16724 gdb_assert (common_loc
&& member_loc
);
16725 gdb_assert (attr_form_is_block (common_loc
));
16726 gdb_assert (attr_form_is_block (member_loc
)
16727 || attr_form_is_constant (member_loc
));
16729 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16730 baton
->per_cu
= cu
->per_cu
;
16731 gdb_assert (baton
->per_cu
);
16733 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16735 if (attr_form_is_constant (member_loc
))
16737 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16738 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16741 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16743 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16746 *ptr
++ = DW_OP_call4
;
16747 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16748 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16751 if (attr_form_is_constant (member_loc
))
16753 *ptr
++ = DW_OP_addr
;
16754 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16755 ptr
+= cu
->header
.addr_size
;
16759 /* We have to copy the data here, because DW_OP_call4 will only
16760 use a DW_AT_location attribute. */
16761 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16762 ptr
+= DW_BLOCK (member_loc
)->size
;
16765 *ptr
++ = DW_OP_plus
;
16766 gdb_assert (ptr
- baton
->data
== baton
->size
);
16768 SYMBOL_LOCATION_BATON (sym
) = baton
;
16769 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16772 /* Create appropriate locally-scoped variables for all the
16773 DW_TAG_common_block entries. Also create a struct common_block
16774 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16775 is used to separate the common blocks name namespace from regular
16779 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16781 struct attribute
*attr
;
16783 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16786 /* Support the .debug_loc offsets. */
16787 if (attr_form_is_block (attr
))
16791 else if (attr_form_is_section_offset (attr
))
16793 dwarf2_complex_location_expr_complaint ();
16798 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16799 "common block member");
16804 if (die
->child
!= NULL
)
16806 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16807 struct die_info
*child_die
;
16808 size_t n_entries
= 0, size
;
16809 struct common_block
*common_block
;
16810 struct symbol
*sym
;
16812 for (child_die
= die
->child
;
16813 child_die
&& child_die
->tag
;
16814 child_die
= sibling_die (child_die
))
16817 size
= (sizeof (struct common_block
)
16818 + (n_entries
- 1) * sizeof (struct symbol
*));
16820 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16822 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16823 common_block
->n_entries
= 0;
16825 for (child_die
= die
->child
;
16826 child_die
&& child_die
->tag
;
16827 child_die
= sibling_die (child_die
))
16829 /* Create the symbol in the DW_TAG_common_block block in the current
16831 sym
= new_symbol (child_die
, NULL
, cu
);
16834 struct attribute
*member_loc
;
16836 common_block
->contents
[common_block
->n_entries
++] = sym
;
16838 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16842 /* GDB has handled this for a long time, but it is
16843 not specified by DWARF. It seems to have been
16844 emitted by gfortran at least as recently as:
16845 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16846 complaint (_("Variable in common block has "
16847 "DW_AT_data_member_location "
16848 "- DIE at %s [in module %s]"),
16849 sect_offset_str (child_die
->sect_off
),
16850 objfile_name (objfile
));
16852 if (attr_form_is_section_offset (member_loc
))
16853 dwarf2_complex_location_expr_complaint ();
16854 else if (attr_form_is_constant (member_loc
)
16855 || attr_form_is_block (member_loc
))
16858 mark_common_block_symbol_computed (sym
, die
, attr
,
16862 dwarf2_complex_location_expr_complaint ();
16867 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16868 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16872 /* Create a type for a C++ namespace. */
16874 static struct type
*
16875 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16877 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16878 const char *previous_prefix
, *name
;
16882 /* For extensions, reuse the type of the original namespace. */
16883 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16885 struct die_info
*ext_die
;
16886 struct dwarf2_cu
*ext_cu
= cu
;
16888 ext_die
= dwarf2_extension (die
, &ext_cu
);
16889 type
= read_type_die (ext_die
, ext_cu
);
16891 /* EXT_CU may not be the same as CU.
16892 Ensure TYPE is recorded with CU in die_type_hash. */
16893 return set_die_type (die
, type
, cu
);
16896 name
= namespace_name (die
, &is_anonymous
, cu
);
16898 /* Now build the name of the current namespace. */
16900 previous_prefix
= determine_prefix (die
, cu
);
16901 if (previous_prefix
[0] != '\0')
16902 name
= typename_concat (&objfile
->objfile_obstack
,
16903 previous_prefix
, name
, 0, cu
);
16905 /* Create the type. */
16906 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16908 return set_die_type (die
, type
, cu
);
16911 /* Read a namespace scope. */
16914 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16916 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16919 /* Add a symbol associated to this if we haven't seen the namespace
16920 before. Also, add a using directive if it's an anonymous
16923 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16927 type
= read_type_die (die
, cu
);
16928 new_symbol (die
, type
, cu
);
16930 namespace_name (die
, &is_anonymous
, cu
);
16933 const char *previous_prefix
= determine_prefix (die
, cu
);
16935 std::vector
<const char *> excludes
;
16936 add_using_directive (using_directives (cu
),
16937 previous_prefix
, TYPE_NAME (type
), NULL
,
16938 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16942 if (die
->child
!= NULL
)
16944 struct die_info
*child_die
= die
->child
;
16946 while (child_die
&& child_die
->tag
)
16948 process_die (child_die
, cu
);
16949 child_die
= sibling_die (child_die
);
16954 /* Read a Fortran module as type. This DIE can be only a declaration used for
16955 imported module. Still we need that type as local Fortran "use ... only"
16956 declaration imports depend on the created type in determine_prefix. */
16958 static struct type
*
16959 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16961 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16962 const char *module_name
;
16965 module_name
= dwarf2_name (die
, cu
);
16966 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16968 return set_die_type (die
, type
, cu
);
16971 /* Read a Fortran module. */
16974 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16976 struct die_info
*child_die
= die
->child
;
16979 type
= read_type_die (die
, cu
);
16980 new_symbol (die
, type
, cu
);
16982 while (child_die
&& child_die
->tag
)
16984 process_die (child_die
, cu
);
16985 child_die
= sibling_die (child_die
);
16989 /* Return the name of the namespace represented by DIE. Set
16990 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16993 static const char *
16994 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16996 struct die_info
*current_die
;
16997 const char *name
= NULL
;
16999 /* Loop through the extensions until we find a name. */
17001 for (current_die
= die
;
17002 current_die
!= NULL
;
17003 current_die
= dwarf2_extension (die
, &cu
))
17005 /* We don't use dwarf2_name here so that we can detect the absence
17006 of a name -> anonymous namespace. */
17007 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
17013 /* Is it an anonymous namespace? */
17015 *is_anonymous
= (name
== NULL
);
17017 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17022 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17023 the user defined type vector. */
17025 static struct type
*
17026 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17028 struct gdbarch
*gdbarch
17029 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17030 struct comp_unit_head
*cu_header
= &cu
->header
;
17032 struct attribute
*attr_byte_size
;
17033 struct attribute
*attr_address_class
;
17034 int byte_size
, addr_class
;
17035 struct type
*target_type
;
17037 target_type
= die_type (die
, cu
);
17039 /* The die_type call above may have already set the type for this DIE. */
17040 type
= get_die_type (die
, cu
);
17044 type
= lookup_pointer_type (target_type
);
17046 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17047 if (attr_byte_size
)
17048 byte_size
= DW_UNSND (attr_byte_size
);
17050 byte_size
= cu_header
->addr_size
;
17052 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17053 if (attr_address_class
)
17054 addr_class
= DW_UNSND (attr_address_class
);
17056 addr_class
= DW_ADDR_none
;
17058 ULONGEST alignment
= get_alignment (cu
, die
);
17060 /* If the pointer size, alignment, or address class is different
17061 than the default, create a type variant marked as such and set
17062 the length accordingly. */
17063 if (TYPE_LENGTH (type
) != byte_size
17064 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17065 && alignment
!= TYPE_RAW_ALIGN (type
))
17066 || addr_class
!= DW_ADDR_none
)
17068 if (gdbarch_address_class_type_flags_p (gdbarch
))
17072 type_flags
= gdbarch_address_class_type_flags
17073 (gdbarch
, byte_size
, addr_class
);
17074 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17076 type
= make_type_with_address_space (type
, type_flags
);
17078 else if (TYPE_LENGTH (type
) != byte_size
)
17080 complaint (_("invalid pointer size %d"), byte_size
);
17082 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17084 complaint (_("Invalid DW_AT_alignment"
17085 " - DIE at %s [in module %s]"),
17086 sect_offset_str (die
->sect_off
),
17087 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17091 /* Should we also complain about unhandled address classes? */
17095 TYPE_LENGTH (type
) = byte_size
;
17096 set_type_align (type
, alignment
);
17097 return set_die_type (die
, type
, cu
);
17100 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17101 the user defined type vector. */
17103 static struct type
*
17104 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17107 struct type
*to_type
;
17108 struct type
*domain
;
17110 to_type
= die_type (die
, cu
);
17111 domain
= die_containing_type (die
, cu
);
17113 /* The calls above may have already set the type for this DIE. */
17114 type
= get_die_type (die
, cu
);
17118 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17119 type
= lookup_methodptr_type (to_type
);
17120 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17122 struct type
*new_type
17123 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17125 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17126 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17127 TYPE_VARARGS (to_type
));
17128 type
= lookup_methodptr_type (new_type
);
17131 type
= lookup_memberptr_type (to_type
, domain
);
17133 return set_die_type (die
, type
, cu
);
17136 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17137 the user defined type vector. */
17139 static struct type
*
17140 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17141 enum type_code refcode
)
17143 struct comp_unit_head
*cu_header
= &cu
->header
;
17144 struct type
*type
, *target_type
;
17145 struct attribute
*attr
;
17147 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17149 target_type
= die_type (die
, cu
);
17151 /* The die_type call above may have already set the type for this DIE. */
17152 type
= get_die_type (die
, cu
);
17156 type
= lookup_reference_type (target_type
, refcode
);
17157 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17160 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17164 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17166 maybe_set_alignment (cu
, die
, type
);
17167 return set_die_type (die
, type
, cu
);
17170 /* Add the given cv-qualifiers to the element type of the array. GCC
17171 outputs DWARF type qualifiers that apply to an array, not the
17172 element type. But GDB relies on the array element type to carry
17173 the cv-qualifiers. This mimics section 6.7.3 of the C99
17176 static struct type
*
17177 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17178 struct type
*base_type
, int cnst
, int voltl
)
17180 struct type
*el_type
, *inner_array
;
17182 base_type
= copy_type (base_type
);
17183 inner_array
= base_type
;
17185 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17187 TYPE_TARGET_TYPE (inner_array
) =
17188 copy_type (TYPE_TARGET_TYPE (inner_array
));
17189 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17192 el_type
= TYPE_TARGET_TYPE (inner_array
);
17193 cnst
|= TYPE_CONST (el_type
);
17194 voltl
|= TYPE_VOLATILE (el_type
);
17195 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17197 return set_die_type (die
, base_type
, cu
);
17200 static struct type
*
17201 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17203 struct type
*base_type
, *cv_type
;
17205 base_type
= die_type (die
, cu
);
17207 /* The die_type call above may have already set the type for this DIE. */
17208 cv_type
= get_die_type (die
, cu
);
17212 /* In case the const qualifier is applied to an array type, the element type
17213 is so qualified, not the array type (section 6.7.3 of C99). */
17214 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17215 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17217 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17218 return set_die_type (die
, cv_type
, cu
);
17221 static struct type
*
17222 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17224 struct type
*base_type
, *cv_type
;
17226 base_type
= die_type (die
, cu
);
17228 /* The die_type call above may have already set the type for this DIE. */
17229 cv_type
= get_die_type (die
, cu
);
17233 /* In case the volatile qualifier is applied to an array type, the
17234 element type is so qualified, not the array type (section 6.7.3
17236 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17237 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17239 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17240 return set_die_type (die
, cv_type
, cu
);
17243 /* Handle DW_TAG_restrict_type. */
17245 static struct type
*
17246 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17248 struct type
*base_type
, *cv_type
;
17250 base_type
= die_type (die
, cu
);
17252 /* The die_type call above may have already set the type for this DIE. */
17253 cv_type
= get_die_type (die
, cu
);
17257 cv_type
= make_restrict_type (base_type
);
17258 return set_die_type (die
, cv_type
, cu
);
17261 /* Handle DW_TAG_atomic_type. */
17263 static struct type
*
17264 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17266 struct type
*base_type
, *cv_type
;
17268 base_type
= die_type (die
, cu
);
17270 /* The die_type call above may have already set the type for this DIE. */
17271 cv_type
= get_die_type (die
, cu
);
17275 cv_type
= make_atomic_type (base_type
);
17276 return set_die_type (die
, cv_type
, cu
);
17279 /* Extract all information from a DW_TAG_string_type DIE and add to
17280 the user defined type vector. It isn't really a user defined type,
17281 but it behaves like one, with other DIE's using an AT_user_def_type
17282 attribute to reference it. */
17284 static struct type
*
17285 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17287 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17288 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17289 struct type
*type
, *range_type
, *index_type
, *char_type
;
17290 struct attribute
*attr
;
17291 unsigned int length
;
17293 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17296 length
= DW_UNSND (attr
);
17300 /* Check for the DW_AT_byte_size attribute. */
17301 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17304 length
= DW_UNSND (attr
);
17312 index_type
= objfile_type (objfile
)->builtin_int
;
17313 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17314 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17315 type
= create_string_type (NULL
, char_type
, range_type
);
17317 return set_die_type (die
, type
, cu
);
17320 /* Assuming that DIE corresponds to a function, returns nonzero
17321 if the function is prototyped. */
17324 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17326 struct attribute
*attr
;
17328 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17329 if (attr
&& (DW_UNSND (attr
) != 0))
17332 /* The DWARF standard implies that the DW_AT_prototyped attribute
17333 is only meaningful for C, but the concept also extends to other
17334 languages that allow unprototyped functions (Eg: Objective C).
17335 For all other languages, assume that functions are always
17337 if (cu
->language
!= language_c
17338 && cu
->language
!= language_objc
17339 && cu
->language
!= language_opencl
)
17342 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17343 prototyped and unprototyped functions; default to prototyped,
17344 since that is more common in modern code (and RealView warns
17345 about unprototyped functions). */
17346 if (producer_is_realview (cu
->producer
))
17352 /* Handle DIES due to C code like:
17356 int (*funcp)(int a, long l);
17360 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17362 static struct type
*
17363 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17365 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17366 struct type
*type
; /* Type that this function returns. */
17367 struct type
*ftype
; /* Function that returns above type. */
17368 struct attribute
*attr
;
17370 type
= die_type (die
, cu
);
17372 /* The die_type call above may have already set the type for this DIE. */
17373 ftype
= get_die_type (die
, cu
);
17377 ftype
= lookup_function_type (type
);
17379 if (prototyped_function_p (die
, cu
))
17380 TYPE_PROTOTYPED (ftype
) = 1;
17382 /* Store the calling convention in the type if it's available in
17383 the subroutine die. Otherwise set the calling convention to
17384 the default value DW_CC_normal. */
17385 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17387 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17388 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17389 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17391 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17393 /* Record whether the function returns normally to its caller or not
17394 if the DWARF producer set that information. */
17395 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17396 if (attr
&& (DW_UNSND (attr
) != 0))
17397 TYPE_NO_RETURN (ftype
) = 1;
17399 /* We need to add the subroutine type to the die immediately so
17400 we don't infinitely recurse when dealing with parameters
17401 declared as the same subroutine type. */
17402 set_die_type (die
, ftype
, cu
);
17404 if (die
->child
!= NULL
)
17406 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17407 struct die_info
*child_die
;
17408 int nparams
, iparams
;
17410 /* Count the number of parameters.
17411 FIXME: GDB currently ignores vararg functions, but knows about
17412 vararg member functions. */
17414 child_die
= die
->child
;
17415 while (child_die
&& child_die
->tag
)
17417 if (child_die
->tag
== DW_TAG_formal_parameter
)
17419 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17420 TYPE_VARARGS (ftype
) = 1;
17421 child_die
= sibling_die (child_die
);
17424 /* Allocate storage for parameters and fill them in. */
17425 TYPE_NFIELDS (ftype
) = nparams
;
17426 TYPE_FIELDS (ftype
) = (struct field
*)
17427 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17429 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17430 even if we error out during the parameters reading below. */
17431 for (iparams
= 0; iparams
< nparams
; iparams
++)
17432 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17435 child_die
= die
->child
;
17436 while (child_die
&& child_die
->tag
)
17438 if (child_die
->tag
== DW_TAG_formal_parameter
)
17440 struct type
*arg_type
;
17442 /* DWARF version 2 has no clean way to discern C++
17443 static and non-static member functions. G++ helps
17444 GDB by marking the first parameter for non-static
17445 member functions (which is the this pointer) as
17446 artificial. We pass this information to
17447 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17449 DWARF version 3 added DW_AT_object_pointer, which GCC
17450 4.5 does not yet generate. */
17451 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17453 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17455 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17456 arg_type
= die_type (child_die
, cu
);
17458 /* RealView does not mark THIS as const, which the testsuite
17459 expects. GCC marks THIS as const in method definitions,
17460 but not in the class specifications (GCC PR 43053). */
17461 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17462 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17465 struct dwarf2_cu
*arg_cu
= cu
;
17466 const char *name
= dwarf2_name (child_die
, cu
);
17468 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17471 /* If the compiler emits this, use it. */
17472 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17475 else if (name
&& strcmp (name
, "this") == 0)
17476 /* Function definitions will have the argument names. */
17478 else if (name
== NULL
&& iparams
== 0)
17479 /* Declarations may not have the names, so like
17480 elsewhere in GDB, assume an artificial first
17481 argument is "this". */
17485 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17489 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17492 child_die
= sibling_die (child_die
);
17499 static struct type
*
17500 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17502 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17503 const char *name
= NULL
;
17504 struct type
*this_type
, *target_type
;
17506 name
= dwarf2_full_name (NULL
, die
, cu
);
17507 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17508 TYPE_TARGET_STUB (this_type
) = 1;
17509 set_die_type (die
, this_type
, cu
);
17510 target_type
= die_type (die
, cu
);
17511 if (target_type
!= this_type
)
17512 TYPE_TARGET_TYPE (this_type
) = target_type
;
17515 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17516 spec and cause infinite loops in GDB. */
17517 complaint (_("Self-referential DW_TAG_typedef "
17518 "- DIE at %s [in module %s]"),
17519 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17520 TYPE_TARGET_TYPE (this_type
) = NULL
;
17525 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17526 (which may be different from NAME) to the architecture back-end to allow
17527 it to guess the correct format if necessary. */
17529 static struct type
*
17530 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17531 const char *name_hint
)
17533 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17534 const struct floatformat
**format
;
17537 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17539 type
= init_float_type (objfile
, bits
, name
, format
);
17541 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17546 /* Allocate an integer type of size BITS and name NAME. */
17548 static struct type
*
17549 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17550 int bits
, int unsigned_p
, const char *name
)
17554 /* Versions of Intel's C Compiler generate an integer type called "void"
17555 instead of using DW_TAG_unspecified_type. This has been seen on
17556 at least versions 14, 17, and 18. */
17557 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17558 && strcmp (name
, "void") == 0)
17559 type
= objfile_type (objfile
)->builtin_void
;
17561 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17566 /* Initialise and return a floating point type of size BITS suitable for
17567 use as a component of a complex number. The NAME_HINT is passed through
17568 when initialising the floating point type and is the name of the complex
17571 As DWARF doesn't currently provide an explicit name for the components
17572 of a complex number, but it can be helpful to have these components
17573 named, we try to select a suitable name based on the size of the
17575 static struct type
*
17576 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17577 struct objfile
*objfile
,
17578 int bits
, const char *name_hint
)
17580 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17581 struct type
*tt
= nullptr;
17583 /* Try to find a suitable floating point builtin type of size BITS.
17584 We're going to use the name of this type as the name for the complex
17585 target type that we are about to create. */
17586 switch (cu
->language
)
17588 case language_fortran
:
17592 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17595 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17597 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17599 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17607 tt
= builtin_type (gdbarch
)->builtin_float
;
17610 tt
= builtin_type (gdbarch
)->builtin_double
;
17612 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17614 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17620 /* If the type we found doesn't match the size we were looking for, then
17621 pretend we didn't find a type at all, the complex target type we
17622 create will then be nameless. */
17623 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17626 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17627 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
);
17630 /* Find a representation of a given base type and install
17631 it in the TYPE field of the die. */
17633 static struct type
*
17634 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17636 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17638 struct attribute
*attr
;
17639 int encoding
= 0, bits
= 0;
17642 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17645 encoding
= DW_UNSND (attr
);
17647 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17650 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17652 name
= dwarf2_name (die
, cu
);
17655 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17660 case DW_ATE_address
:
17661 /* Turn DW_ATE_address into a void * pointer. */
17662 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17663 type
= init_pointer_type (objfile
, bits
, name
, type
);
17665 case DW_ATE_boolean
:
17666 type
= init_boolean_type (objfile
, bits
, 1, name
);
17668 case DW_ATE_complex_float
:
17669 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
);
17670 type
= init_complex_type (objfile
, name
, type
);
17672 case DW_ATE_decimal_float
:
17673 type
= init_decfloat_type (objfile
, bits
, name
);
17676 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17678 case DW_ATE_signed
:
17679 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17681 case DW_ATE_unsigned
:
17682 if (cu
->language
== language_fortran
17684 && startswith (name
, "character("))
17685 type
= init_character_type (objfile
, bits
, 1, name
);
17687 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17689 case DW_ATE_signed_char
:
17690 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17691 || cu
->language
== language_pascal
17692 || cu
->language
== language_fortran
)
17693 type
= init_character_type (objfile
, bits
, 0, name
);
17695 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17697 case DW_ATE_unsigned_char
:
17698 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17699 || cu
->language
== language_pascal
17700 || cu
->language
== language_fortran
17701 || cu
->language
== language_rust
)
17702 type
= init_character_type (objfile
, bits
, 1, name
);
17704 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17708 gdbarch
*arch
= get_objfile_arch (objfile
);
17711 type
= builtin_type (arch
)->builtin_char16
;
17712 else if (bits
== 32)
17713 type
= builtin_type (arch
)->builtin_char32
;
17716 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17718 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17720 return set_die_type (die
, type
, cu
);
17725 complaint (_("unsupported DW_AT_encoding: '%s'"),
17726 dwarf_type_encoding_name (encoding
));
17727 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17731 if (name
&& strcmp (name
, "char") == 0)
17732 TYPE_NOSIGN (type
) = 1;
17734 maybe_set_alignment (cu
, die
, type
);
17736 return set_die_type (die
, type
, cu
);
17739 /* Parse dwarf attribute if it's a block, reference or constant and put the
17740 resulting value of the attribute into struct bound_prop.
17741 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17744 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17745 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17746 struct type
*default_type
)
17748 struct dwarf2_property_baton
*baton
;
17749 struct obstack
*obstack
17750 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17752 gdb_assert (default_type
!= NULL
);
17754 if (attr
== NULL
|| prop
== NULL
)
17757 if (attr_form_is_block (attr
))
17759 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17760 baton
->property_type
= default_type
;
17761 baton
->locexpr
.per_cu
= cu
->per_cu
;
17762 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17763 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17764 baton
->locexpr
.is_reference
= false;
17765 prop
->data
.baton
= baton
;
17766 prop
->kind
= PROP_LOCEXPR
;
17767 gdb_assert (prop
->data
.baton
!= NULL
);
17769 else if (attr_form_is_ref (attr
))
17771 struct dwarf2_cu
*target_cu
= cu
;
17772 struct die_info
*target_die
;
17773 struct attribute
*target_attr
;
17775 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17776 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17777 if (target_attr
== NULL
)
17778 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17780 if (target_attr
== NULL
)
17783 switch (target_attr
->name
)
17785 case DW_AT_location
:
17786 if (attr_form_is_section_offset (target_attr
))
17788 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17789 baton
->property_type
= die_type (target_die
, target_cu
);
17790 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17791 prop
->data
.baton
= baton
;
17792 prop
->kind
= PROP_LOCLIST
;
17793 gdb_assert (prop
->data
.baton
!= NULL
);
17795 else if (attr_form_is_block (target_attr
))
17797 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17798 baton
->property_type
= die_type (target_die
, target_cu
);
17799 baton
->locexpr
.per_cu
= cu
->per_cu
;
17800 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17801 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17802 baton
->locexpr
.is_reference
= true;
17803 prop
->data
.baton
= baton
;
17804 prop
->kind
= PROP_LOCEXPR
;
17805 gdb_assert (prop
->data
.baton
!= NULL
);
17809 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17810 "dynamic property");
17814 case DW_AT_data_member_location
:
17818 if (!handle_data_member_location (target_die
, target_cu
,
17822 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17823 baton
->property_type
= read_type_die (target_die
->parent
,
17825 baton
->offset_info
.offset
= offset
;
17826 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17827 prop
->data
.baton
= baton
;
17828 prop
->kind
= PROP_ADDR_OFFSET
;
17833 else if (attr_form_is_constant (attr
))
17835 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17836 prop
->kind
= PROP_CONST
;
17840 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17841 dwarf2_name (die
, cu
));
17848 /* Find an integer type the same size as the address size given in the
17849 compilation unit header for PER_CU. UNSIGNED_P controls if the integer
17850 is unsigned or not. */
17852 static struct type
*
17853 dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data
*per_cu
,
17856 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
17857 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
17858 struct type
*int_type
;
17860 /* Helper macro to examine the various builtin types. */
17861 #define TRY_TYPE(F) \
17862 int_type = (unsigned_p \
17863 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17864 : objfile_type (objfile)->builtin_ ## F); \
17865 if (int_type != NULL && TYPE_LENGTH (int_type) == addr_size) \
17872 TRY_TYPE (long_long
);
17876 gdb_assert_not_reached ("unable to find suitable integer type");
17879 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17880 present (which is valid) then compute the default type based on the
17881 compilation units address size. */
17883 static struct type
*
17884 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17886 struct type
*index_type
= die_type (die
, cu
);
17888 /* Dwarf-2 specifications explicitly allows to create subrange types
17889 without specifying a base type.
17890 In that case, the base type must be set to the type of
17891 the lower bound, upper bound or count, in that order, if any of these
17892 three attributes references an object that has a type.
17893 If no base type is found, the Dwarf-2 specifications say that
17894 a signed integer type of size equal to the size of an address should
17896 For the following C code: `extern char gdb_int [];'
17897 GCC produces an empty range DIE.
17898 FIXME: muller/2010-05-28: Possible references to object for low bound,
17899 high bound or count are not yet handled by this code. */
17900 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17901 index_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17906 /* Read the given DW_AT_subrange DIE. */
17908 static struct type
*
17909 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17911 struct type
*base_type
, *orig_base_type
;
17912 struct type
*range_type
;
17913 struct attribute
*attr
;
17914 struct dynamic_prop low
, high
;
17915 int low_default_is_valid
;
17916 int high_bound_is_count
= 0;
17918 ULONGEST negative_mask
;
17920 orig_base_type
= read_subrange_index_type (die
, cu
);
17922 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17923 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17924 creating the range type, but we use the result of check_typedef
17925 when examining properties of the type. */
17926 base_type
= check_typedef (orig_base_type
);
17928 /* The die_type call above may have already set the type for this DIE. */
17929 range_type
= get_die_type (die
, cu
);
17933 low
.kind
= PROP_CONST
;
17934 high
.kind
= PROP_CONST
;
17935 high
.data
.const_val
= 0;
17937 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17938 omitting DW_AT_lower_bound. */
17939 switch (cu
->language
)
17942 case language_cplus
:
17943 low
.data
.const_val
= 0;
17944 low_default_is_valid
= 1;
17946 case language_fortran
:
17947 low
.data
.const_val
= 1;
17948 low_default_is_valid
= 1;
17951 case language_objc
:
17952 case language_rust
:
17953 low
.data
.const_val
= 0;
17954 low_default_is_valid
= (cu
->header
.version
>= 4);
17958 case language_pascal
:
17959 low
.data
.const_val
= 1;
17960 low_default_is_valid
= (cu
->header
.version
>= 4);
17963 low
.data
.const_val
= 0;
17964 low_default_is_valid
= 0;
17968 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17970 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17971 else if (!low_default_is_valid
)
17972 complaint (_("Missing DW_AT_lower_bound "
17973 "- DIE at %s [in module %s]"),
17974 sect_offset_str (die
->sect_off
),
17975 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17977 struct attribute
*attr_ub
, *attr_count
;
17978 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17979 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17981 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17982 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17984 /* If bounds are constant do the final calculation here. */
17985 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17986 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17988 high_bound_is_count
= 1;
17992 if (attr_ub
!= NULL
)
17993 complaint (_("Unresolved DW_AT_upper_bound "
17994 "- DIE at %s [in module %s]"),
17995 sect_offset_str (die
->sect_off
),
17996 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17997 if (attr_count
!= NULL
)
17998 complaint (_("Unresolved DW_AT_count "
17999 "- DIE at %s [in module %s]"),
18000 sect_offset_str (die
->sect_off
),
18001 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
18006 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
18007 if (bias_attr
!= nullptr && attr_form_is_constant (bias_attr
))
18008 bias
= dwarf2_get_attr_constant_value (bias_attr
, 0);
18010 /* Normally, the DWARF producers are expected to use a signed
18011 constant form (Eg. DW_FORM_sdata) to express negative bounds.
18012 But this is unfortunately not always the case, as witnessed
18013 with GCC, for instance, where the ambiguous DW_FORM_dataN form
18014 is used instead. To work around that ambiguity, we treat
18015 the bounds as signed, and thus sign-extend their values, when
18016 the base type is signed. */
18018 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
18019 if (low
.kind
== PROP_CONST
18020 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
18021 low
.data
.const_val
|= negative_mask
;
18022 if (high
.kind
== PROP_CONST
18023 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
18024 high
.data
.const_val
|= negative_mask
;
18026 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
18028 if (high_bound_is_count
)
18029 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
18031 /* Ada expects an empty array on no boundary attributes. */
18032 if (attr
== NULL
&& cu
->language
!= language_ada
)
18033 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
18035 name
= dwarf2_name (die
, cu
);
18037 TYPE_NAME (range_type
) = name
;
18039 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
18041 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
18043 maybe_set_alignment (cu
, die
, range_type
);
18045 set_die_type (die
, range_type
, cu
);
18047 /* set_die_type should be already done. */
18048 set_descriptive_type (range_type
, die
, cu
);
18053 static struct type
*
18054 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18058 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
18060 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
18062 /* In Ada, an unspecified type is typically used when the description
18063 of the type is deferred to a different unit. When encountering
18064 such a type, we treat it as a stub, and try to resolve it later on,
18066 if (cu
->language
== language_ada
)
18067 TYPE_STUB (type
) = 1;
18069 return set_die_type (die
, type
, cu
);
18072 /* Read a single die and all its descendents. Set the die's sibling
18073 field to NULL; set other fields in the die correctly, and set all
18074 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
18075 location of the info_ptr after reading all of those dies. PARENT
18076 is the parent of the die in question. */
18078 static struct die_info
*
18079 read_die_and_children (const struct die_reader_specs
*reader
,
18080 const gdb_byte
*info_ptr
,
18081 const gdb_byte
**new_info_ptr
,
18082 struct die_info
*parent
)
18084 struct die_info
*die
;
18085 const gdb_byte
*cur_ptr
;
18088 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
18091 *new_info_ptr
= cur_ptr
;
18094 store_in_ref_table (die
, reader
->cu
);
18097 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
18101 *new_info_ptr
= cur_ptr
;
18104 die
->sibling
= NULL
;
18105 die
->parent
= parent
;
18109 /* Read a die, all of its descendents, and all of its siblings; set
18110 all of the fields of all of the dies correctly. Arguments are as
18111 in read_die_and_children. */
18113 static struct die_info
*
18114 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18115 const gdb_byte
*info_ptr
,
18116 const gdb_byte
**new_info_ptr
,
18117 struct die_info
*parent
)
18119 struct die_info
*first_die
, *last_sibling
;
18120 const gdb_byte
*cur_ptr
;
18122 cur_ptr
= info_ptr
;
18123 first_die
= last_sibling
= NULL
;
18127 struct die_info
*die
18128 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18132 *new_info_ptr
= cur_ptr
;
18139 last_sibling
->sibling
= die
;
18141 last_sibling
= die
;
18145 /* Read a die, all of its descendents, and all of its siblings; set
18146 all of the fields of all of the dies correctly. Arguments are as
18147 in read_die_and_children.
18148 This the main entry point for reading a DIE and all its children. */
18150 static struct die_info
*
18151 read_die_and_siblings (const struct die_reader_specs
*reader
,
18152 const gdb_byte
*info_ptr
,
18153 const gdb_byte
**new_info_ptr
,
18154 struct die_info
*parent
)
18156 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18157 new_info_ptr
, parent
);
18159 if (dwarf_die_debug
)
18161 fprintf_unfiltered (gdb_stdlog
,
18162 "Read die from %s@0x%x of %s:\n",
18163 get_section_name (reader
->die_section
),
18164 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18165 bfd_get_filename (reader
->abfd
));
18166 dump_die (die
, dwarf_die_debug
);
18172 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18174 The caller is responsible for filling in the extra attributes
18175 and updating (*DIEP)->num_attrs.
18176 Set DIEP to point to a newly allocated die with its information,
18177 except for its child, sibling, and parent fields.
18178 Set HAS_CHILDREN to tell whether the die has children or not. */
18180 static const gdb_byte
*
18181 read_full_die_1 (const struct die_reader_specs
*reader
,
18182 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18183 int *has_children
, int num_extra_attrs
)
18185 unsigned int abbrev_number
, bytes_read
, i
;
18186 struct abbrev_info
*abbrev
;
18187 struct die_info
*die
;
18188 struct dwarf2_cu
*cu
= reader
->cu
;
18189 bfd
*abfd
= reader
->abfd
;
18191 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18192 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18193 info_ptr
+= bytes_read
;
18194 if (!abbrev_number
)
18201 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18203 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18205 bfd_get_filename (abfd
));
18207 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18208 die
->sect_off
= sect_off
;
18209 die
->tag
= abbrev
->tag
;
18210 die
->abbrev
= abbrev_number
;
18212 /* Make the result usable.
18213 The caller needs to update num_attrs after adding the extra
18215 die
->num_attrs
= abbrev
->num_attrs
;
18217 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18218 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18222 *has_children
= abbrev
->has_children
;
18226 /* Read a die and all its attributes.
18227 Set DIEP to point to a newly allocated die with its information,
18228 except for its child, sibling, and parent fields.
18229 Set HAS_CHILDREN to tell whether the die has children or not. */
18231 static const gdb_byte
*
18232 read_full_die (const struct die_reader_specs
*reader
,
18233 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18236 const gdb_byte
*result
;
18238 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18240 if (dwarf_die_debug
)
18242 fprintf_unfiltered (gdb_stdlog
,
18243 "Read die from %s@0x%x of %s:\n",
18244 get_section_name (reader
->die_section
),
18245 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18246 bfd_get_filename (reader
->abfd
));
18247 dump_die (*diep
, dwarf_die_debug
);
18253 /* Abbreviation tables.
18255 In DWARF version 2, the description of the debugging information is
18256 stored in a separate .debug_abbrev section. Before we read any
18257 dies from a section we read in all abbreviations and install them
18258 in a hash table. */
18260 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18262 struct abbrev_info
*
18263 abbrev_table::alloc_abbrev ()
18265 struct abbrev_info
*abbrev
;
18267 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18268 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18273 /* Add an abbreviation to the table. */
18276 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18277 struct abbrev_info
*abbrev
)
18279 unsigned int hash_number
;
18281 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18282 abbrev
->next
= m_abbrevs
[hash_number
];
18283 m_abbrevs
[hash_number
] = abbrev
;
18286 /* Look up an abbrev in the table.
18287 Returns NULL if the abbrev is not found. */
18289 struct abbrev_info
*
18290 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18292 unsigned int hash_number
;
18293 struct abbrev_info
*abbrev
;
18295 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18296 abbrev
= m_abbrevs
[hash_number
];
18300 if (abbrev
->number
== abbrev_number
)
18302 abbrev
= abbrev
->next
;
18307 /* Read in an abbrev table. */
18309 static abbrev_table_up
18310 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18311 struct dwarf2_section_info
*section
,
18312 sect_offset sect_off
)
18314 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18315 bfd
*abfd
= get_section_bfd_owner (section
);
18316 const gdb_byte
*abbrev_ptr
;
18317 struct abbrev_info
*cur_abbrev
;
18318 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18319 unsigned int abbrev_form
;
18320 struct attr_abbrev
*cur_attrs
;
18321 unsigned int allocated_attrs
;
18323 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18325 dwarf2_read_section (objfile
, section
);
18326 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18327 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18328 abbrev_ptr
+= bytes_read
;
18330 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18331 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18333 /* Loop until we reach an abbrev number of 0. */
18334 while (abbrev_number
)
18336 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18338 /* read in abbrev header */
18339 cur_abbrev
->number
= abbrev_number
;
18341 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18342 abbrev_ptr
+= bytes_read
;
18343 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18346 /* now read in declarations */
18349 LONGEST implicit_const
;
18351 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18352 abbrev_ptr
+= bytes_read
;
18353 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18354 abbrev_ptr
+= bytes_read
;
18355 if (abbrev_form
== DW_FORM_implicit_const
)
18357 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18359 abbrev_ptr
+= bytes_read
;
18363 /* Initialize it due to a false compiler warning. */
18364 implicit_const
= -1;
18367 if (abbrev_name
== 0)
18370 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18372 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18374 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18377 cur_attrs
[cur_abbrev
->num_attrs
].name
18378 = (enum dwarf_attribute
) abbrev_name
;
18379 cur_attrs
[cur_abbrev
->num_attrs
].form
18380 = (enum dwarf_form
) abbrev_form
;
18381 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18382 ++cur_abbrev
->num_attrs
;
18385 cur_abbrev
->attrs
=
18386 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18387 cur_abbrev
->num_attrs
);
18388 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18389 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18391 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18393 /* Get next abbreviation.
18394 Under Irix6 the abbreviations for a compilation unit are not
18395 always properly terminated with an abbrev number of 0.
18396 Exit loop if we encounter an abbreviation which we have
18397 already read (which means we are about to read the abbreviations
18398 for the next compile unit) or if the end of the abbreviation
18399 table is reached. */
18400 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18402 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18403 abbrev_ptr
+= bytes_read
;
18404 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18409 return abbrev_table
;
18412 /* Returns nonzero if TAG represents a type that we might generate a partial
18416 is_type_tag_for_partial (int tag
)
18421 /* Some types that would be reasonable to generate partial symbols for,
18422 that we don't at present. */
18423 case DW_TAG_array_type
:
18424 case DW_TAG_file_type
:
18425 case DW_TAG_ptr_to_member_type
:
18426 case DW_TAG_set_type
:
18427 case DW_TAG_string_type
:
18428 case DW_TAG_subroutine_type
:
18430 case DW_TAG_base_type
:
18431 case DW_TAG_class_type
:
18432 case DW_TAG_interface_type
:
18433 case DW_TAG_enumeration_type
:
18434 case DW_TAG_structure_type
:
18435 case DW_TAG_subrange_type
:
18436 case DW_TAG_typedef
:
18437 case DW_TAG_union_type
:
18444 /* Load all DIEs that are interesting for partial symbols into memory. */
18446 static struct partial_die_info
*
18447 load_partial_dies (const struct die_reader_specs
*reader
,
18448 const gdb_byte
*info_ptr
, int building_psymtab
)
18450 struct dwarf2_cu
*cu
= reader
->cu
;
18451 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18452 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18453 unsigned int bytes_read
;
18454 unsigned int load_all
= 0;
18455 int nesting_level
= 1;
18460 gdb_assert (cu
->per_cu
!= NULL
);
18461 if (cu
->per_cu
->load_all_dies
)
18465 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18469 &cu
->comp_unit_obstack
,
18470 hashtab_obstack_allocate
,
18471 dummy_obstack_deallocate
);
18475 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18477 /* A NULL abbrev means the end of a series of children. */
18478 if (abbrev
== NULL
)
18480 if (--nesting_level
== 0)
18483 info_ptr
+= bytes_read
;
18484 last_die
= parent_die
;
18485 parent_die
= parent_die
->die_parent
;
18489 /* Check for template arguments. We never save these; if
18490 they're seen, we just mark the parent, and go on our way. */
18491 if (parent_die
!= NULL
18492 && cu
->language
== language_cplus
18493 && (abbrev
->tag
== DW_TAG_template_type_param
18494 || abbrev
->tag
== DW_TAG_template_value_param
))
18496 parent_die
->has_template_arguments
= 1;
18500 /* We don't need a partial DIE for the template argument. */
18501 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18506 /* We only recurse into c++ subprograms looking for template arguments.
18507 Skip their other children. */
18509 && cu
->language
== language_cplus
18510 && parent_die
!= NULL
18511 && parent_die
->tag
== DW_TAG_subprogram
)
18513 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18517 /* Check whether this DIE is interesting enough to save. Normally
18518 we would not be interested in members here, but there may be
18519 later variables referencing them via DW_AT_specification (for
18520 static members). */
18522 && !is_type_tag_for_partial (abbrev
->tag
)
18523 && abbrev
->tag
!= DW_TAG_constant
18524 && abbrev
->tag
!= DW_TAG_enumerator
18525 && abbrev
->tag
!= DW_TAG_subprogram
18526 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18527 && abbrev
->tag
!= DW_TAG_lexical_block
18528 && abbrev
->tag
!= DW_TAG_variable
18529 && abbrev
->tag
!= DW_TAG_namespace
18530 && abbrev
->tag
!= DW_TAG_module
18531 && abbrev
->tag
!= DW_TAG_member
18532 && abbrev
->tag
!= DW_TAG_imported_unit
18533 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18535 /* Otherwise we skip to the next sibling, if any. */
18536 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18540 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18543 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18545 /* This two-pass algorithm for processing partial symbols has a
18546 high cost in cache pressure. Thus, handle some simple cases
18547 here which cover the majority of C partial symbols. DIEs
18548 which neither have specification tags in them, nor could have
18549 specification tags elsewhere pointing at them, can simply be
18550 processed and discarded.
18552 This segment is also optional; scan_partial_symbols and
18553 add_partial_symbol will handle these DIEs if we chain
18554 them in normally. When compilers which do not emit large
18555 quantities of duplicate debug information are more common,
18556 this code can probably be removed. */
18558 /* Any complete simple types at the top level (pretty much all
18559 of them, for a language without namespaces), can be processed
18561 if (parent_die
== NULL
18562 && pdi
.has_specification
== 0
18563 && pdi
.is_declaration
== 0
18564 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18565 || pdi
.tag
== DW_TAG_base_type
18566 || pdi
.tag
== DW_TAG_subrange_type
))
18568 if (building_psymtab
&& pdi
.name
!= NULL
)
18569 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), false,
18570 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18571 psymbol_placement::STATIC
,
18572 0, cu
->language
, objfile
);
18573 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18577 /* The exception for DW_TAG_typedef with has_children above is
18578 a workaround of GCC PR debug/47510. In the case of this complaint
18579 type_name_or_error will error on such types later.
18581 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18582 it could not find the child DIEs referenced later, this is checked
18583 above. In correct DWARF DW_TAG_typedef should have no children. */
18585 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18586 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18587 "- DIE at %s [in module %s]"),
18588 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18590 /* If we're at the second level, and we're an enumerator, and
18591 our parent has no specification (meaning possibly lives in a
18592 namespace elsewhere), then we can add the partial symbol now
18593 instead of queueing it. */
18594 if (pdi
.tag
== DW_TAG_enumerator
18595 && parent_die
!= NULL
18596 && parent_die
->die_parent
== NULL
18597 && parent_die
->tag
== DW_TAG_enumeration_type
18598 && parent_die
->has_specification
== 0)
18600 if (pdi
.name
== NULL
)
18601 complaint (_("malformed enumerator DIE ignored"));
18602 else if (building_psymtab
)
18603 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), false,
18604 VAR_DOMAIN
, LOC_CONST
, -1,
18605 cu
->language
== language_cplus
18606 ? psymbol_placement::GLOBAL
18607 : psymbol_placement::STATIC
,
18608 0, cu
->language
, objfile
);
18610 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18614 struct partial_die_info
*part_die
18615 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18617 /* We'll save this DIE so link it in. */
18618 part_die
->die_parent
= parent_die
;
18619 part_die
->die_sibling
= NULL
;
18620 part_die
->die_child
= NULL
;
18622 if (last_die
&& last_die
== parent_die
)
18623 last_die
->die_child
= part_die
;
18625 last_die
->die_sibling
= part_die
;
18627 last_die
= part_die
;
18629 if (first_die
== NULL
)
18630 first_die
= part_die
;
18632 /* Maybe add the DIE to the hash table. Not all DIEs that we
18633 find interesting need to be in the hash table, because we
18634 also have the parent/sibling/child chains; only those that we
18635 might refer to by offset later during partial symbol reading.
18637 For now this means things that might have be the target of a
18638 DW_AT_specification, DW_AT_abstract_origin, or
18639 DW_AT_extension. DW_AT_extension will refer only to
18640 namespaces; DW_AT_abstract_origin refers to functions (and
18641 many things under the function DIE, but we do not recurse
18642 into function DIEs during partial symbol reading) and
18643 possibly variables as well; DW_AT_specification refers to
18644 declarations. Declarations ought to have the DW_AT_declaration
18645 flag. It happens that GCC forgets to put it in sometimes, but
18646 only for functions, not for types.
18648 Adding more things than necessary to the hash table is harmless
18649 except for the performance cost. Adding too few will result in
18650 wasted time in find_partial_die, when we reread the compilation
18651 unit with load_all_dies set. */
18654 || abbrev
->tag
== DW_TAG_constant
18655 || abbrev
->tag
== DW_TAG_subprogram
18656 || abbrev
->tag
== DW_TAG_variable
18657 || abbrev
->tag
== DW_TAG_namespace
18658 || part_die
->is_declaration
)
18662 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18663 to_underlying (part_die
->sect_off
),
18668 /* For some DIEs we want to follow their children (if any). For C
18669 we have no reason to follow the children of structures; for other
18670 languages we have to, so that we can get at method physnames
18671 to infer fully qualified class names, for DW_AT_specification,
18672 and for C++ template arguments. For C++, we also look one level
18673 inside functions to find template arguments (if the name of the
18674 function does not already contain the template arguments).
18676 For Ada and Fortran, we need to scan the children of subprograms
18677 and lexical blocks as well because these languages allow the
18678 definition of nested entities that could be interesting for the
18679 debugger, such as nested subprograms for instance. */
18680 if (last_die
->has_children
18682 || last_die
->tag
== DW_TAG_namespace
18683 || last_die
->tag
== DW_TAG_module
18684 || last_die
->tag
== DW_TAG_enumeration_type
18685 || (cu
->language
== language_cplus
18686 && last_die
->tag
== DW_TAG_subprogram
18687 && (last_die
->name
== NULL
18688 || strchr (last_die
->name
, '<') == NULL
))
18689 || (cu
->language
!= language_c
18690 && (last_die
->tag
== DW_TAG_class_type
18691 || last_die
->tag
== DW_TAG_interface_type
18692 || last_die
->tag
== DW_TAG_structure_type
18693 || last_die
->tag
== DW_TAG_union_type
))
18694 || ((cu
->language
== language_ada
18695 || cu
->language
== language_fortran
)
18696 && (last_die
->tag
== DW_TAG_subprogram
18697 || last_die
->tag
== DW_TAG_lexical_block
))))
18700 parent_die
= last_die
;
18704 /* Otherwise we skip to the next sibling, if any. */
18705 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18707 /* Back to the top, do it again. */
18711 partial_die_info::partial_die_info (sect_offset sect_off_
,
18712 struct abbrev_info
*abbrev
)
18713 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18717 /* Read a minimal amount of information into the minimal die structure.
18718 INFO_PTR should point just after the initial uleb128 of a DIE. */
18721 partial_die_info::read (const struct die_reader_specs
*reader
,
18722 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18724 struct dwarf2_cu
*cu
= reader
->cu
;
18725 struct dwarf2_per_objfile
*dwarf2_per_objfile
18726 = cu
->per_cu
->dwarf2_per_objfile
;
18728 int has_low_pc_attr
= 0;
18729 int has_high_pc_attr
= 0;
18730 int high_pc_relative
= 0;
18732 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18734 struct attribute attr
;
18736 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18738 /* Store the data if it is of an attribute we want to keep in a
18739 partial symbol table. */
18745 case DW_TAG_compile_unit
:
18746 case DW_TAG_partial_unit
:
18747 case DW_TAG_type_unit
:
18748 /* Compilation units have a DW_AT_name that is a filename, not
18749 a source language identifier. */
18750 case DW_TAG_enumeration_type
:
18751 case DW_TAG_enumerator
:
18752 /* These tags always have simple identifiers already; no need
18753 to canonicalize them. */
18754 name
= DW_STRING (&attr
);
18758 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18761 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18762 &objfile
->per_bfd
->storage_obstack
);
18767 case DW_AT_linkage_name
:
18768 case DW_AT_MIPS_linkage_name
:
18769 /* Note that both forms of linkage name might appear. We
18770 assume they will be the same, and we only store the last
18772 linkage_name
= DW_STRING (&attr
);
18775 has_low_pc_attr
= 1;
18776 lowpc
= attr_value_as_address (&attr
);
18778 case DW_AT_high_pc
:
18779 has_high_pc_attr
= 1;
18780 highpc
= attr_value_as_address (&attr
);
18781 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18782 high_pc_relative
= 1;
18784 case DW_AT_location
:
18785 /* Support the .debug_loc offsets. */
18786 if (attr_form_is_block (&attr
))
18788 d
.locdesc
= DW_BLOCK (&attr
);
18790 else if (attr_form_is_section_offset (&attr
))
18792 dwarf2_complex_location_expr_complaint ();
18796 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18797 "partial symbol information");
18800 case DW_AT_external
:
18801 is_external
= DW_UNSND (&attr
);
18803 case DW_AT_declaration
:
18804 is_declaration
= DW_UNSND (&attr
);
18809 case DW_AT_abstract_origin
:
18810 case DW_AT_specification
:
18811 case DW_AT_extension
:
18812 has_specification
= 1;
18813 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18814 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18815 || cu
->per_cu
->is_dwz
);
18817 case DW_AT_sibling
:
18818 /* Ignore absolute siblings, they might point outside of
18819 the current compile unit. */
18820 if (attr
.form
== DW_FORM_ref_addr
)
18821 complaint (_("ignoring absolute DW_AT_sibling"));
18824 const gdb_byte
*buffer
= reader
->buffer
;
18825 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18826 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18828 if (sibling_ptr
< info_ptr
)
18829 complaint (_("DW_AT_sibling points backwards"));
18830 else if (sibling_ptr
> reader
->buffer_end
)
18831 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18833 sibling
= sibling_ptr
;
18836 case DW_AT_byte_size
:
18839 case DW_AT_const_value
:
18840 has_const_value
= 1;
18842 case DW_AT_calling_convention
:
18843 /* DWARF doesn't provide a way to identify a program's source-level
18844 entry point. DW_AT_calling_convention attributes are only meant
18845 to describe functions' calling conventions.
18847 However, because it's a necessary piece of information in
18848 Fortran, and before DWARF 4 DW_CC_program was the only
18849 piece of debugging information whose definition refers to
18850 a 'main program' at all, several compilers marked Fortran
18851 main programs with DW_CC_program --- even when those
18852 functions use the standard calling conventions.
18854 Although DWARF now specifies a way to provide this
18855 information, we support this practice for backward
18857 if (DW_UNSND (&attr
) == DW_CC_program
18858 && cu
->language
== language_fortran
)
18859 main_subprogram
= 1;
18862 if (DW_UNSND (&attr
) == DW_INL_inlined
18863 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18864 may_be_inlined
= 1;
18868 if (tag
== DW_TAG_imported_unit
)
18870 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18871 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18872 || cu
->per_cu
->is_dwz
);
18876 case DW_AT_main_subprogram
:
18877 main_subprogram
= DW_UNSND (&attr
);
18882 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18883 but that requires a full DIE, so instead we just
18885 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18886 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18887 + (need_ranges_base
18891 /* Value of the DW_AT_ranges attribute is the offset in the
18892 .debug_ranges section. */
18893 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18904 /* For Ada, if both the name and the linkage name appear, we prefer
18905 the latter. This lets "catch exception" work better, regardless
18906 of the order in which the name and linkage name were emitted.
18907 Really, though, this is just a workaround for the fact that gdb
18908 doesn't store both the name and the linkage name. */
18909 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18910 name
= linkage_name
;
18912 if (high_pc_relative
)
18915 if (has_low_pc_attr
&& has_high_pc_attr
)
18917 /* When using the GNU linker, .gnu.linkonce. sections are used to
18918 eliminate duplicate copies of functions and vtables and such.
18919 The linker will arbitrarily choose one and discard the others.
18920 The AT_*_pc values for such functions refer to local labels in
18921 these sections. If the section from that file was discarded, the
18922 labels are not in the output, so the relocs get a value of 0.
18923 If this is a discarded function, mark the pc bounds as invalid,
18924 so that GDB will ignore it. */
18925 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18927 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18928 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18930 complaint (_("DW_AT_low_pc %s is zero "
18931 "for DIE at %s [in module %s]"),
18932 paddress (gdbarch
, lowpc
),
18933 sect_offset_str (sect_off
),
18934 objfile_name (objfile
));
18936 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18937 else if (lowpc
>= highpc
)
18939 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18940 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18942 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18943 "for DIE at %s [in module %s]"),
18944 paddress (gdbarch
, lowpc
),
18945 paddress (gdbarch
, highpc
),
18946 sect_offset_str (sect_off
),
18947 objfile_name (objfile
));
18956 /* Find a cached partial DIE at OFFSET in CU. */
18958 struct partial_die_info
*
18959 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18961 struct partial_die_info
*lookup_die
= NULL
;
18962 struct partial_die_info
part_die (sect_off
);
18964 lookup_die
= ((struct partial_die_info
*)
18965 htab_find_with_hash (partial_dies
, &part_die
,
18966 to_underlying (sect_off
)));
18971 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18972 except in the case of .debug_types DIEs which do not reference
18973 outside their CU (they do however referencing other types via
18974 DW_FORM_ref_sig8). */
18976 static const struct cu_partial_die_info
18977 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18979 struct dwarf2_per_objfile
*dwarf2_per_objfile
18980 = cu
->per_cu
->dwarf2_per_objfile
;
18981 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18982 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18983 struct partial_die_info
*pd
= NULL
;
18985 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18986 && offset_in_cu_p (&cu
->header
, sect_off
))
18988 pd
= cu
->find_partial_die (sect_off
);
18991 /* We missed recording what we needed.
18992 Load all dies and try again. */
18993 per_cu
= cu
->per_cu
;
18997 /* TUs don't reference other CUs/TUs (except via type signatures). */
18998 if (cu
->per_cu
->is_debug_types
)
19000 error (_("Dwarf Error: Type Unit at offset %s contains"
19001 " external reference to offset %s [in module %s].\n"),
19002 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
19003 bfd_get_filename (objfile
->obfd
));
19005 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
19006 dwarf2_per_objfile
);
19008 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
19009 load_partial_comp_unit (per_cu
);
19011 per_cu
->cu
->last_used
= 0;
19012 pd
= per_cu
->cu
->find_partial_die (sect_off
);
19015 /* If we didn't find it, and not all dies have been loaded,
19016 load them all and try again. */
19018 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
19020 per_cu
->load_all_dies
= 1;
19022 /* This is nasty. When we reread the DIEs, somewhere up the call chain
19023 THIS_CU->cu may already be in use. So we can't just free it and
19024 replace its DIEs with the ones we read in. Instead, we leave those
19025 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
19026 and clobber THIS_CU->cu->partial_dies with the hash table for the new
19028 load_partial_comp_unit (per_cu
);
19030 pd
= per_cu
->cu
->find_partial_die (sect_off
);
19034 internal_error (__FILE__
, __LINE__
,
19035 _("could not find partial DIE %s "
19036 "in cache [from module %s]\n"),
19037 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
19038 return { per_cu
->cu
, pd
};
19041 /* See if we can figure out if the class lives in a namespace. We do
19042 this by looking for a member function; its demangled name will
19043 contain namespace info, if there is any. */
19046 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
19047 struct dwarf2_cu
*cu
)
19049 /* NOTE: carlton/2003-10-07: Getting the info this way changes
19050 what template types look like, because the demangler
19051 frequently doesn't give the same name as the debug info. We
19052 could fix this by only using the demangled name to get the
19053 prefix (but see comment in read_structure_type). */
19055 struct partial_die_info
*real_pdi
;
19056 struct partial_die_info
*child_pdi
;
19058 /* If this DIE (this DIE's specification, if any) has a parent, then
19059 we should not do this. We'll prepend the parent's fully qualified
19060 name when we create the partial symbol. */
19062 real_pdi
= struct_pdi
;
19063 while (real_pdi
->has_specification
)
19065 auto res
= find_partial_die (real_pdi
->spec_offset
,
19066 real_pdi
->spec_is_dwz
, cu
);
19067 real_pdi
= res
.pdi
;
19071 if (real_pdi
->die_parent
!= NULL
)
19074 for (child_pdi
= struct_pdi
->die_child
;
19076 child_pdi
= child_pdi
->die_sibling
)
19078 if (child_pdi
->tag
== DW_TAG_subprogram
19079 && child_pdi
->linkage_name
!= NULL
)
19081 char *actual_class_name
19082 = language_class_name_from_physname (cu
->language_defn
,
19083 child_pdi
->linkage_name
);
19084 if (actual_class_name
!= NULL
)
19086 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19088 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
19089 actual_class_name
);
19090 xfree (actual_class_name
);
19098 partial_die_info::fixup (struct dwarf2_cu
*cu
)
19100 /* Once we've fixed up a die, there's no point in doing so again.
19101 This also avoids a memory leak if we were to call
19102 guess_partial_die_structure_name multiple times. */
19106 /* If we found a reference attribute and the DIE has no name, try
19107 to find a name in the referred to DIE. */
19109 if (name
== NULL
&& has_specification
)
19111 struct partial_die_info
*spec_die
;
19113 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19114 spec_die
= res
.pdi
;
19117 spec_die
->fixup (cu
);
19119 if (spec_die
->name
)
19121 name
= spec_die
->name
;
19123 /* Copy DW_AT_external attribute if it is set. */
19124 if (spec_die
->is_external
)
19125 is_external
= spec_die
->is_external
;
19129 /* Set default names for some unnamed DIEs. */
19131 if (name
== NULL
&& tag
== DW_TAG_namespace
)
19132 name
= CP_ANONYMOUS_NAMESPACE_STR
;
19134 /* If there is no parent die to provide a namespace, and there are
19135 children, see if we can determine the namespace from their linkage
19137 if (cu
->language
== language_cplus
19138 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
19139 && die_parent
== NULL
19141 && (tag
== DW_TAG_class_type
19142 || tag
== DW_TAG_structure_type
19143 || tag
== DW_TAG_union_type
))
19144 guess_partial_die_structure_name (this, cu
);
19146 /* GCC might emit a nameless struct or union that has a linkage
19147 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19149 && (tag
== DW_TAG_class_type
19150 || tag
== DW_TAG_interface_type
19151 || tag
== DW_TAG_structure_type
19152 || tag
== DW_TAG_union_type
)
19153 && linkage_name
!= NULL
)
19157 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
19162 /* Strip any leading namespaces/classes, keep only the base name.
19163 DW_AT_name for named DIEs does not contain the prefixes. */
19164 base
= strrchr (demangled
, ':');
19165 if (base
&& base
> demangled
&& base
[-1] == ':')
19170 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19171 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, base
);
19179 /* Read an attribute value described by an attribute form. */
19181 static const gdb_byte
*
19182 read_attribute_value (const struct die_reader_specs
*reader
,
19183 struct attribute
*attr
, unsigned form
,
19184 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19186 struct dwarf2_cu
*cu
= reader
->cu
;
19187 struct dwarf2_per_objfile
*dwarf2_per_objfile
19188 = cu
->per_cu
->dwarf2_per_objfile
;
19189 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19190 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19191 bfd
*abfd
= reader
->abfd
;
19192 struct comp_unit_head
*cu_header
= &cu
->header
;
19193 unsigned int bytes_read
;
19194 struct dwarf_block
*blk
;
19196 attr
->form
= (enum dwarf_form
) form
;
19199 case DW_FORM_ref_addr
:
19200 if (cu
->header
.version
== 2)
19201 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19203 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
19204 &cu
->header
, &bytes_read
);
19205 info_ptr
+= bytes_read
;
19207 case DW_FORM_GNU_ref_alt
:
19208 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19209 info_ptr
+= bytes_read
;
19212 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19213 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19214 info_ptr
+= bytes_read
;
19216 case DW_FORM_block2
:
19217 blk
= dwarf_alloc_block (cu
);
19218 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19220 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19221 info_ptr
+= blk
->size
;
19222 DW_BLOCK (attr
) = blk
;
19224 case DW_FORM_block4
:
19225 blk
= dwarf_alloc_block (cu
);
19226 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19228 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19229 info_ptr
+= blk
->size
;
19230 DW_BLOCK (attr
) = blk
;
19232 case DW_FORM_data2
:
19233 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19236 case DW_FORM_data4
:
19237 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19240 case DW_FORM_data8
:
19241 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19244 case DW_FORM_data16
:
19245 blk
= dwarf_alloc_block (cu
);
19247 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19249 DW_BLOCK (attr
) = blk
;
19251 case DW_FORM_sec_offset
:
19252 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19253 info_ptr
+= bytes_read
;
19255 case DW_FORM_string
:
19256 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19257 DW_STRING_IS_CANONICAL (attr
) = 0;
19258 info_ptr
+= bytes_read
;
19261 if (!cu
->per_cu
->is_dwz
)
19263 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19264 abfd
, info_ptr
, cu_header
,
19266 DW_STRING_IS_CANONICAL (attr
) = 0;
19267 info_ptr
+= bytes_read
;
19271 case DW_FORM_line_strp
:
19272 if (!cu
->per_cu
->is_dwz
)
19274 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19276 cu_header
, &bytes_read
);
19277 DW_STRING_IS_CANONICAL (attr
) = 0;
19278 info_ptr
+= bytes_read
;
19282 case DW_FORM_GNU_strp_alt
:
19284 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19285 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19288 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19290 DW_STRING_IS_CANONICAL (attr
) = 0;
19291 info_ptr
+= bytes_read
;
19294 case DW_FORM_exprloc
:
19295 case DW_FORM_block
:
19296 blk
= dwarf_alloc_block (cu
);
19297 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19298 info_ptr
+= bytes_read
;
19299 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19300 info_ptr
+= blk
->size
;
19301 DW_BLOCK (attr
) = blk
;
19303 case DW_FORM_block1
:
19304 blk
= dwarf_alloc_block (cu
);
19305 blk
->size
= read_1_byte (abfd
, info_ptr
);
19307 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19308 info_ptr
+= blk
->size
;
19309 DW_BLOCK (attr
) = blk
;
19311 case DW_FORM_data1
:
19312 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19316 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19319 case DW_FORM_flag_present
:
19320 DW_UNSND (attr
) = 1;
19322 case DW_FORM_sdata
:
19323 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19324 info_ptr
+= bytes_read
;
19326 case DW_FORM_udata
:
19327 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19328 info_ptr
+= bytes_read
;
19331 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19332 + read_1_byte (abfd
, info_ptr
));
19336 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19337 + read_2_bytes (abfd
, info_ptr
));
19341 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19342 + read_4_bytes (abfd
, info_ptr
));
19346 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19347 + read_8_bytes (abfd
, info_ptr
));
19350 case DW_FORM_ref_sig8
:
19351 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19354 case DW_FORM_ref_udata
:
19355 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19356 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19357 info_ptr
+= bytes_read
;
19359 case DW_FORM_indirect
:
19360 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19361 info_ptr
+= bytes_read
;
19362 if (form
== DW_FORM_implicit_const
)
19364 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19365 info_ptr
+= bytes_read
;
19367 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19370 case DW_FORM_implicit_const
:
19371 DW_SND (attr
) = implicit_const
;
19373 case DW_FORM_addrx
:
19374 case DW_FORM_GNU_addr_index
:
19375 if (reader
->dwo_file
== NULL
)
19377 /* For now flag a hard error.
19378 Later we can turn this into a complaint. */
19379 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19380 dwarf_form_name (form
),
19381 bfd_get_filename (abfd
));
19383 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19384 info_ptr
+= bytes_read
;
19387 case DW_FORM_strx1
:
19388 case DW_FORM_strx2
:
19389 case DW_FORM_strx3
:
19390 case DW_FORM_strx4
:
19391 case DW_FORM_GNU_str_index
:
19392 if (reader
->dwo_file
== NULL
)
19394 /* For now flag a hard error.
19395 Later we can turn this into a complaint if warranted. */
19396 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19397 dwarf_form_name (form
),
19398 bfd_get_filename (abfd
));
19401 ULONGEST str_index
;
19402 if (form
== DW_FORM_strx1
)
19404 str_index
= read_1_byte (abfd
, info_ptr
);
19407 else if (form
== DW_FORM_strx2
)
19409 str_index
= read_2_bytes (abfd
, info_ptr
);
19412 else if (form
== DW_FORM_strx3
)
19414 str_index
= read_3_bytes (abfd
, info_ptr
);
19417 else if (form
== DW_FORM_strx4
)
19419 str_index
= read_4_bytes (abfd
, info_ptr
);
19424 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19425 info_ptr
+= bytes_read
;
19427 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19428 DW_STRING_IS_CANONICAL (attr
) = 0;
19432 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19433 dwarf_form_name (form
),
19434 bfd_get_filename (abfd
));
19438 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19439 attr
->form
= DW_FORM_GNU_ref_alt
;
19441 /* We have seen instances where the compiler tried to emit a byte
19442 size attribute of -1 which ended up being encoded as an unsigned
19443 0xffffffff. Although 0xffffffff is technically a valid size value,
19444 an object of this size seems pretty unlikely so we can relatively
19445 safely treat these cases as if the size attribute was invalid and
19446 treat them as zero by default. */
19447 if (attr
->name
== DW_AT_byte_size
19448 && form
== DW_FORM_data4
19449 && DW_UNSND (attr
) >= 0xffffffff)
19452 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19453 hex_string (DW_UNSND (attr
)));
19454 DW_UNSND (attr
) = 0;
19460 /* Read an attribute described by an abbreviated attribute. */
19462 static const gdb_byte
*
19463 read_attribute (const struct die_reader_specs
*reader
,
19464 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19465 const gdb_byte
*info_ptr
)
19467 attr
->name
= abbrev
->name
;
19468 return read_attribute_value (reader
, attr
, abbrev
->form
,
19469 abbrev
->implicit_const
, info_ptr
);
19472 /* Read dwarf information from a buffer. */
19474 static unsigned int
19475 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19477 return bfd_get_8 (abfd
, buf
);
19481 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19483 return bfd_get_signed_8 (abfd
, buf
);
19486 static unsigned int
19487 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19489 return bfd_get_16 (abfd
, buf
);
19493 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19495 return bfd_get_signed_16 (abfd
, buf
);
19498 static unsigned int
19499 read_3_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19501 unsigned int result
= 0;
19502 for (int i
= 0; i
< 3; ++i
)
19504 unsigned char byte
= bfd_get_8 (abfd
, buf
);
19506 result
|= ((unsigned int) byte
<< (i
* 8));
19511 static unsigned int
19512 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19514 return bfd_get_32 (abfd
, buf
);
19518 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19520 return bfd_get_signed_32 (abfd
, buf
);
19524 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19526 return bfd_get_64 (abfd
, buf
);
19530 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19531 unsigned int *bytes_read
)
19533 struct comp_unit_head
*cu_header
= &cu
->header
;
19534 CORE_ADDR retval
= 0;
19536 if (cu_header
->signed_addr_p
)
19538 switch (cu_header
->addr_size
)
19541 retval
= bfd_get_signed_16 (abfd
, buf
);
19544 retval
= bfd_get_signed_32 (abfd
, buf
);
19547 retval
= bfd_get_signed_64 (abfd
, buf
);
19550 internal_error (__FILE__
, __LINE__
,
19551 _("read_address: bad switch, signed [in module %s]"),
19552 bfd_get_filename (abfd
));
19557 switch (cu_header
->addr_size
)
19560 retval
= bfd_get_16 (abfd
, buf
);
19563 retval
= bfd_get_32 (abfd
, buf
);
19566 retval
= bfd_get_64 (abfd
, buf
);
19569 internal_error (__FILE__
, __LINE__
,
19570 _("read_address: bad switch, "
19571 "unsigned [in module %s]"),
19572 bfd_get_filename (abfd
));
19576 *bytes_read
= cu_header
->addr_size
;
19580 /* Read the initial length from a section. The (draft) DWARF 3
19581 specification allows the initial length to take up either 4 bytes
19582 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19583 bytes describe the length and all offsets will be 8 bytes in length
19586 An older, non-standard 64-bit format is also handled by this
19587 function. The older format in question stores the initial length
19588 as an 8-byte quantity without an escape value. Lengths greater
19589 than 2^32 aren't very common which means that the initial 4 bytes
19590 is almost always zero. Since a length value of zero doesn't make
19591 sense for the 32-bit format, this initial zero can be considered to
19592 be an escape value which indicates the presence of the older 64-bit
19593 format. As written, the code can't detect (old format) lengths
19594 greater than 4GB. If it becomes necessary to handle lengths
19595 somewhat larger than 4GB, we could allow other small values (such
19596 as the non-sensical values of 1, 2, and 3) to also be used as
19597 escape values indicating the presence of the old format.
19599 The value returned via bytes_read should be used to increment the
19600 relevant pointer after calling read_initial_length().
19602 [ Note: read_initial_length() and read_offset() are based on the
19603 document entitled "DWARF Debugging Information Format", revision
19604 3, draft 8, dated November 19, 2001. This document was obtained
19607 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19609 This document is only a draft and is subject to change. (So beware.)
19611 Details regarding the older, non-standard 64-bit format were
19612 determined empirically by examining 64-bit ELF files produced by
19613 the SGI toolchain on an IRIX 6.5 machine.
19615 - Kevin, July 16, 2002
19619 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19621 LONGEST length
= bfd_get_32 (abfd
, buf
);
19623 if (length
== 0xffffffff)
19625 length
= bfd_get_64 (abfd
, buf
+ 4);
19628 else if (length
== 0)
19630 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19631 length
= bfd_get_64 (abfd
, buf
);
19642 /* Cover function for read_initial_length.
19643 Returns the length of the object at BUF, and stores the size of the
19644 initial length in *BYTES_READ and stores the size that offsets will be in
19646 If the initial length size is not equivalent to that specified in
19647 CU_HEADER then issue a complaint.
19648 This is useful when reading non-comp-unit headers. */
19651 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19652 const struct comp_unit_head
*cu_header
,
19653 unsigned int *bytes_read
,
19654 unsigned int *offset_size
)
19656 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19658 gdb_assert (cu_header
->initial_length_size
== 4
19659 || cu_header
->initial_length_size
== 8
19660 || cu_header
->initial_length_size
== 12);
19662 if (cu_header
->initial_length_size
!= *bytes_read
)
19663 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19665 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19669 /* Read an offset from the data stream. The size of the offset is
19670 given by cu_header->offset_size. */
19673 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19674 const struct comp_unit_head
*cu_header
,
19675 unsigned int *bytes_read
)
19677 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19679 *bytes_read
= cu_header
->offset_size
;
19683 /* Read an offset from the data stream. */
19686 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19688 LONGEST retval
= 0;
19690 switch (offset_size
)
19693 retval
= bfd_get_32 (abfd
, buf
);
19696 retval
= bfd_get_64 (abfd
, buf
);
19699 internal_error (__FILE__
, __LINE__
,
19700 _("read_offset_1: bad switch [in module %s]"),
19701 bfd_get_filename (abfd
));
19707 static const gdb_byte
*
19708 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19710 /* If the size of a host char is 8 bits, we can return a pointer
19711 to the buffer, otherwise we have to copy the data to a buffer
19712 allocated on the temporary obstack. */
19713 gdb_assert (HOST_CHAR_BIT
== 8);
19717 static const char *
19718 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19719 unsigned int *bytes_read_ptr
)
19721 /* If the size of a host char is 8 bits, we can return a pointer
19722 to the string, otherwise we have to copy the string to a buffer
19723 allocated on the temporary obstack. */
19724 gdb_assert (HOST_CHAR_BIT
== 8);
19727 *bytes_read_ptr
= 1;
19730 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19731 return (const char *) buf
;
19734 /* Return pointer to string at section SECT offset STR_OFFSET with error
19735 reporting strings FORM_NAME and SECT_NAME. */
19737 static const char *
19738 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19739 bfd
*abfd
, LONGEST str_offset
,
19740 struct dwarf2_section_info
*sect
,
19741 const char *form_name
,
19742 const char *sect_name
)
19744 dwarf2_read_section (objfile
, sect
);
19745 if (sect
->buffer
== NULL
)
19746 error (_("%s used without %s section [in module %s]"),
19747 form_name
, sect_name
, bfd_get_filename (abfd
));
19748 if (str_offset
>= sect
->size
)
19749 error (_("%s pointing outside of %s section [in module %s]"),
19750 form_name
, sect_name
, bfd_get_filename (abfd
));
19751 gdb_assert (HOST_CHAR_BIT
== 8);
19752 if (sect
->buffer
[str_offset
] == '\0')
19754 return (const char *) (sect
->buffer
+ str_offset
);
19757 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19759 static const char *
19760 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19761 bfd
*abfd
, LONGEST str_offset
)
19763 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19765 &dwarf2_per_objfile
->str
,
19766 "DW_FORM_strp", ".debug_str");
19769 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19771 static const char *
19772 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19773 bfd
*abfd
, LONGEST str_offset
)
19775 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19777 &dwarf2_per_objfile
->line_str
,
19778 "DW_FORM_line_strp",
19779 ".debug_line_str");
19782 /* Read a string at offset STR_OFFSET in the .debug_str section from
19783 the .dwz file DWZ. Throw an error if the offset is too large. If
19784 the string consists of a single NUL byte, return NULL; otherwise
19785 return a pointer to the string. */
19787 static const char *
19788 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19789 LONGEST str_offset
)
19791 dwarf2_read_section (objfile
, &dwz
->str
);
19793 if (dwz
->str
.buffer
== NULL
)
19794 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19795 "section [in module %s]"),
19796 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19797 if (str_offset
>= dwz
->str
.size
)
19798 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19799 ".debug_str section [in module %s]"),
19800 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19801 gdb_assert (HOST_CHAR_BIT
== 8);
19802 if (dwz
->str
.buffer
[str_offset
] == '\0')
19804 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19807 /* Return pointer to string at .debug_str offset as read from BUF.
19808 BUF is assumed to be in a compilation unit described by CU_HEADER.
19809 Return *BYTES_READ_PTR count of bytes read from BUF. */
19811 static const char *
19812 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19813 const gdb_byte
*buf
,
19814 const struct comp_unit_head
*cu_header
,
19815 unsigned int *bytes_read_ptr
)
19817 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19819 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19822 /* Return pointer to string at .debug_line_str offset as read from BUF.
19823 BUF is assumed to be in a compilation unit described by CU_HEADER.
19824 Return *BYTES_READ_PTR count of bytes read from BUF. */
19826 static const char *
19827 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19828 bfd
*abfd
, const gdb_byte
*buf
,
19829 const struct comp_unit_head
*cu_header
,
19830 unsigned int *bytes_read_ptr
)
19832 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19834 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19839 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19840 unsigned int *bytes_read_ptr
)
19843 unsigned int num_read
;
19845 unsigned char byte
;
19852 byte
= bfd_get_8 (abfd
, buf
);
19855 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19856 if ((byte
& 128) == 0)
19862 *bytes_read_ptr
= num_read
;
19867 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19868 unsigned int *bytes_read_ptr
)
19871 int shift
, num_read
;
19872 unsigned char byte
;
19879 byte
= bfd_get_8 (abfd
, buf
);
19882 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19884 if ((byte
& 128) == 0)
19889 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19890 result
|= -(((ULONGEST
) 1) << shift
);
19891 *bytes_read_ptr
= num_read
;
19895 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19896 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19897 ADDR_SIZE is the size of addresses from the CU header. */
19900 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19901 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19903 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19904 bfd
*abfd
= objfile
->obfd
;
19905 const gdb_byte
*info_ptr
;
19907 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19908 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19909 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19910 objfile_name (objfile
));
19911 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19912 error (_("DW_FORM_addr_index pointing outside of "
19913 ".debug_addr section [in module %s]"),
19914 objfile_name (objfile
));
19915 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19916 + addr_base
+ addr_index
* addr_size
);
19917 if (addr_size
== 4)
19918 return bfd_get_32 (abfd
, info_ptr
);
19920 return bfd_get_64 (abfd
, info_ptr
);
19923 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19926 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19928 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19929 cu
->addr_base
, cu
->header
.addr_size
);
19932 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19935 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19936 unsigned int *bytes_read
)
19938 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19939 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19941 return read_addr_index (cu
, addr_index
);
19944 /* Data structure to pass results from dwarf2_read_addr_index_reader
19945 back to dwarf2_read_addr_index. */
19947 struct dwarf2_read_addr_index_data
19949 ULONGEST addr_base
;
19953 /* die_reader_func for dwarf2_read_addr_index. */
19956 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19957 const gdb_byte
*info_ptr
,
19958 struct die_info
*comp_unit_die
,
19962 struct dwarf2_cu
*cu
= reader
->cu
;
19963 struct dwarf2_read_addr_index_data
*aidata
=
19964 (struct dwarf2_read_addr_index_data
*) data
;
19966 aidata
->addr_base
= cu
->addr_base
;
19967 aidata
->addr_size
= cu
->header
.addr_size
;
19970 /* Given an index in .debug_addr, fetch the value.
19971 NOTE: This can be called during dwarf expression evaluation,
19972 long after the debug information has been read, and thus per_cu->cu
19973 may no longer exist. */
19976 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19977 unsigned int addr_index
)
19979 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19980 struct dwarf2_cu
*cu
= per_cu
->cu
;
19981 ULONGEST addr_base
;
19984 /* We need addr_base and addr_size.
19985 If we don't have PER_CU->cu, we have to get it.
19986 Nasty, but the alternative is storing the needed info in PER_CU,
19987 which at this point doesn't seem justified: it's not clear how frequently
19988 it would get used and it would increase the size of every PER_CU.
19989 Entry points like dwarf2_per_cu_addr_size do a similar thing
19990 so we're not in uncharted territory here.
19991 Alas we need to be a bit more complicated as addr_base is contained
19994 We don't need to read the entire CU(/TU).
19995 We just need the header and top level die.
19997 IWBN to use the aging mechanism to let us lazily later discard the CU.
19998 For now we skip this optimization. */
20002 addr_base
= cu
->addr_base
;
20003 addr_size
= cu
->header
.addr_size
;
20007 struct dwarf2_read_addr_index_data aidata
;
20009 /* Note: We can't use init_cutu_and_read_dies_simple here,
20010 we need addr_base. */
20011 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
20012 dwarf2_read_addr_index_reader
, &aidata
);
20013 addr_base
= aidata
.addr_base
;
20014 addr_size
= aidata
.addr_size
;
20017 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
20021 /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string.
20022 This is only used by the Fission support. */
20024 static const char *
20025 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
20027 struct dwarf2_cu
*cu
= reader
->cu
;
20028 struct dwarf2_per_objfile
*dwarf2_per_objfile
20029 = cu
->per_cu
->dwarf2_per_objfile
;
20030 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20031 const char *objf_name
= objfile_name (objfile
);
20032 bfd
*abfd
= objfile
->obfd
;
20033 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
20034 struct dwarf2_section_info
*str_offsets_section
=
20035 &reader
->dwo_file
->sections
.str_offsets
;
20036 const gdb_byte
*info_ptr
;
20037 ULONGEST str_offset
;
20038 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
20040 dwarf2_read_section (objfile
, str_section
);
20041 dwarf2_read_section (objfile
, str_offsets_section
);
20042 if (str_section
->buffer
== NULL
)
20043 error (_("%s used without .debug_str.dwo section"
20044 " in CU at offset %s [in module %s]"),
20045 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20046 if (str_offsets_section
->buffer
== NULL
)
20047 error (_("%s used without .debug_str_offsets.dwo section"
20048 " in CU at offset %s [in module %s]"),
20049 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20050 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
20051 error (_("%s pointing outside of .debug_str_offsets.dwo"
20052 " section in CU at offset %s [in module %s]"),
20053 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20054 info_ptr
= (str_offsets_section
->buffer
20055 + str_index
* cu
->header
.offset_size
);
20056 if (cu
->header
.offset_size
== 4)
20057 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20059 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20060 if (str_offset
>= str_section
->size
)
20061 error (_("Offset from %s pointing outside of"
20062 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20063 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20064 return (const char *) (str_section
->buffer
+ str_offset
);
20067 /* Return the length of an LEB128 number in BUF. */
20070 leb128_size (const gdb_byte
*buf
)
20072 const gdb_byte
*begin
= buf
;
20078 if ((byte
& 128) == 0)
20079 return buf
- begin
;
20084 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20093 cu
->language
= language_c
;
20096 case DW_LANG_C_plus_plus
:
20097 case DW_LANG_C_plus_plus_11
:
20098 case DW_LANG_C_plus_plus_14
:
20099 cu
->language
= language_cplus
;
20102 cu
->language
= language_d
;
20104 case DW_LANG_Fortran77
:
20105 case DW_LANG_Fortran90
:
20106 case DW_LANG_Fortran95
:
20107 case DW_LANG_Fortran03
:
20108 case DW_LANG_Fortran08
:
20109 cu
->language
= language_fortran
;
20112 cu
->language
= language_go
;
20114 case DW_LANG_Mips_Assembler
:
20115 cu
->language
= language_asm
;
20117 case DW_LANG_Ada83
:
20118 case DW_LANG_Ada95
:
20119 cu
->language
= language_ada
;
20121 case DW_LANG_Modula2
:
20122 cu
->language
= language_m2
;
20124 case DW_LANG_Pascal83
:
20125 cu
->language
= language_pascal
;
20128 cu
->language
= language_objc
;
20131 case DW_LANG_Rust_old
:
20132 cu
->language
= language_rust
;
20134 case DW_LANG_Cobol74
:
20135 case DW_LANG_Cobol85
:
20137 cu
->language
= language_minimal
;
20140 cu
->language_defn
= language_def (cu
->language
);
20143 /* Return the named attribute or NULL if not there. */
20145 static struct attribute
*
20146 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20151 struct attribute
*spec
= NULL
;
20153 for (i
= 0; i
< die
->num_attrs
; ++i
)
20155 if (die
->attrs
[i
].name
== name
)
20156 return &die
->attrs
[i
];
20157 if (die
->attrs
[i
].name
== DW_AT_specification
20158 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20159 spec
= &die
->attrs
[i
];
20165 die
= follow_die_ref (die
, spec
, &cu
);
20171 /* Return the named attribute or NULL if not there,
20172 but do not follow DW_AT_specification, etc.
20173 This is for use in contexts where we're reading .debug_types dies.
20174 Following DW_AT_specification, DW_AT_abstract_origin will take us
20175 back up the chain, and we want to go down. */
20177 static struct attribute
*
20178 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
20182 for (i
= 0; i
< die
->num_attrs
; ++i
)
20183 if (die
->attrs
[i
].name
== name
)
20184 return &die
->attrs
[i
];
20189 /* Return the string associated with a string-typed attribute, or NULL if it
20190 is either not found or is of an incorrect type. */
20192 static const char *
20193 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20195 struct attribute
*attr
;
20196 const char *str
= NULL
;
20198 attr
= dwarf2_attr (die
, name
, cu
);
20202 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
20203 || attr
->form
== DW_FORM_string
20204 || attr
->form
== DW_FORM_strx
20205 || attr
->form
== DW_FORM_strx1
20206 || attr
->form
== DW_FORM_strx2
20207 || attr
->form
== DW_FORM_strx3
20208 || attr
->form
== DW_FORM_strx4
20209 || attr
->form
== DW_FORM_GNU_str_index
20210 || attr
->form
== DW_FORM_GNU_strp_alt
)
20211 str
= DW_STRING (attr
);
20213 complaint (_("string type expected for attribute %s for "
20214 "DIE at %s in module %s"),
20215 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20216 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
20222 /* Return the dwo name or NULL if not present. If present, it is in either
20223 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
20224 static const char *
20225 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20227 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
20228 if (dwo_name
== nullptr)
20229 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
20233 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20234 and holds a non-zero value. This function should only be used for
20235 DW_FORM_flag or DW_FORM_flag_present attributes. */
20238 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20240 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20242 return (attr
&& DW_UNSND (attr
));
20246 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20248 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20249 which value is non-zero. However, we have to be careful with
20250 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20251 (via dwarf2_flag_true_p) follows this attribute. So we may
20252 end up accidently finding a declaration attribute that belongs
20253 to a different DIE referenced by the specification attribute,
20254 even though the given DIE does not have a declaration attribute. */
20255 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20256 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20259 /* Return the die giving the specification for DIE, if there is
20260 one. *SPEC_CU is the CU containing DIE on input, and the CU
20261 containing the return value on output. If there is no
20262 specification, but there is an abstract origin, that is
20265 static struct die_info
*
20266 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20268 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20271 if (spec_attr
== NULL
)
20272 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20274 if (spec_attr
== NULL
)
20277 return follow_die_ref (die
, spec_attr
, spec_cu
);
20280 /* Stub for free_line_header to match void * callback types. */
20283 free_line_header_voidp (void *arg
)
20285 struct line_header
*lh
= (struct line_header
*) arg
;
20291 line_header::add_include_dir (const char *include_dir
)
20293 if (dwarf_line_debug
>= 2)
20297 new_size
= m_include_dirs
.size ();
20299 new_size
= m_include_dirs
.size () + 1;
20300 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
20301 new_size
, include_dir
);
20303 m_include_dirs
.push_back (include_dir
);
20307 line_header::add_file_name (const char *name
,
20309 unsigned int mod_time
,
20310 unsigned int length
)
20312 if (dwarf_line_debug
>= 2)
20316 new_size
= file_names_size ();
20318 new_size
= file_names_size () + 1;
20319 fprintf_unfiltered (gdb_stdlog
, "Adding file %zu: %s\n",
20322 m_file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20325 /* A convenience function to find the proper .debug_line section for a CU. */
20327 static struct dwarf2_section_info
*
20328 get_debug_line_section (struct dwarf2_cu
*cu
)
20330 struct dwarf2_section_info
*section
;
20331 struct dwarf2_per_objfile
*dwarf2_per_objfile
20332 = cu
->per_cu
->dwarf2_per_objfile
;
20334 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20336 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20337 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20338 else if (cu
->per_cu
->is_dwz
)
20340 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20342 section
= &dwz
->line
;
20345 section
= &dwarf2_per_objfile
->line
;
20350 /* Read directory or file name entry format, starting with byte of
20351 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20352 entries count and the entries themselves in the described entry
20356 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20357 bfd
*abfd
, const gdb_byte
**bufp
,
20358 struct line_header
*lh
,
20359 const struct comp_unit_head
*cu_header
,
20360 void (*callback
) (struct line_header
*lh
,
20363 unsigned int mod_time
,
20364 unsigned int length
))
20366 gdb_byte format_count
, formati
;
20367 ULONGEST data_count
, datai
;
20368 const gdb_byte
*buf
= *bufp
;
20369 const gdb_byte
*format_header_data
;
20370 unsigned int bytes_read
;
20372 format_count
= read_1_byte (abfd
, buf
);
20374 format_header_data
= buf
;
20375 for (formati
= 0; formati
< format_count
; formati
++)
20377 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20379 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20383 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20385 for (datai
= 0; datai
< data_count
; datai
++)
20387 const gdb_byte
*format
= format_header_data
;
20388 struct file_entry fe
;
20390 for (formati
= 0; formati
< format_count
; formati
++)
20392 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20393 format
+= bytes_read
;
20395 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20396 format
+= bytes_read
;
20398 gdb::optional
<const char *> string
;
20399 gdb::optional
<unsigned int> uint
;
20403 case DW_FORM_string
:
20404 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20408 case DW_FORM_line_strp
:
20409 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20416 case DW_FORM_data1
:
20417 uint
.emplace (read_1_byte (abfd
, buf
));
20421 case DW_FORM_data2
:
20422 uint
.emplace (read_2_bytes (abfd
, buf
));
20426 case DW_FORM_data4
:
20427 uint
.emplace (read_4_bytes (abfd
, buf
));
20431 case DW_FORM_data8
:
20432 uint
.emplace (read_8_bytes (abfd
, buf
));
20436 case DW_FORM_data16
:
20437 /* This is used for MD5, but file_entry does not record MD5s. */
20441 case DW_FORM_udata
:
20442 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20446 case DW_FORM_block
:
20447 /* It is valid only for DW_LNCT_timestamp which is ignored by
20452 switch (content_type
)
20455 if (string
.has_value ())
20458 case DW_LNCT_directory_index
:
20459 if (uint
.has_value ())
20460 fe
.d_index
= (dir_index
) *uint
;
20462 case DW_LNCT_timestamp
:
20463 if (uint
.has_value ())
20464 fe
.mod_time
= *uint
;
20467 if (uint
.has_value ())
20473 complaint (_("Unknown format content type %s"),
20474 pulongest (content_type
));
20478 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20484 /* Read the statement program header starting at OFFSET in
20485 .debug_line, or .debug_line.dwo. Return a pointer
20486 to a struct line_header, allocated using xmalloc.
20487 Returns NULL if there is a problem reading the header, e.g., if it
20488 has a version we don't understand.
20490 NOTE: the strings in the include directory and file name tables of
20491 the returned object point into the dwarf line section buffer,
20492 and must not be freed. */
20494 static line_header_up
20495 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20497 const gdb_byte
*line_ptr
;
20498 unsigned int bytes_read
, offset_size
;
20500 const char *cur_dir
, *cur_file
;
20501 struct dwarf2_section_info
*section
;
20503 struct dwarf2_per_objfile
*dwarf2_per_objfile
20504 = cu
->per_cu
->dwarf2_per_objfile
;
20506 section
= get_debug_line_section (cu
);
20507 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20508 if (section
->buffer
== NULL
)
20510 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20511 complaint (_("missing .debug_line.dwo section"));
20513 complaint (_("missing .debug_line section"));
20517 /* We can't do this until we know the section is non-empty.
20518 Only then do we know we have such a section. */
20519 abfd
= get_section_bfd_owner (section
);
20521 /* Make sure that at least there's room for the total_length field.
20522 That could be 12 bytes long, but we're just going to fudge that. */
20523 if (to_underlying (sect_off
) + 4 >= section
->size
)
20525 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20529 line_header_up
lh (new line_header ());
20531 lh
->sect_off
= sect_off
;
20532 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20534 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20536 /* Read in the header. */
20538 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20539 &bytes_read
, &offset_size
);
20540 line_ptr
+= bytes_read
;
20542 const gdb_byte
*start_here
= line_ptr
;
20544 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20546 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20549 lh
->statement_program_end
= start_here
+ lh
->total_length
;
20550 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20552 if (lh
->version
> 5)
20554 /* This is a version we don't understand. The format could have
20555 changed in ways we don't handle properly so just punt. */
20556 complaint (_("unsupported version in .debug_line section"));
20559 if (lh
->version
>= 5)
20561 gdb_byte segment_selector_size
;
20563 /* Skip address size. */
20564 read_1_byte (abfd
, line_ptr
);
20567 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20569 if (segment_selector_size
!= 0)
20571 complaint (_("unsupported segment selector size %u "
20572 "in .debug_line section"),
20573 segment_selector_size
);
20577 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20578 line_ptr
+= offset_size
;
20579 lh
->statement_program_start
= line_ptr
+ lh
->header_length
;
20580 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20582 if (lh
->version
>= 4)
20584 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20588 lh
->maximum_ops_per_instruction
= 1;
20590 if (lh
->maximum_ops_per_instruction
== 0)
20592 lh
->maximum_ops_per_instruction
= 1;
20593 complaint (_("invalid maximum_ops_per_instruction "
20594 "in `.debug_line' section"));
20597 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20599 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20601 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20603 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20605 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20607 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20608 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20610 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20614 if (lh
->version
>= 5)
20616 /* Read directory table. */
20617 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20619 [] (struct line_header
*header
, const char *name
,
20620 dir_index d_index
, unsigned int mod_time
,
20621 unsigned int length
)
20623 header
->add_include_dir (name
);
20626 /* Read file name table. */
20627 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20629 [] (struct line_header
*header
, const char *name
,
20630 dir_index d_index
, unsigned int mod_time
,
20631 unsigned int length
)
20633 header
->add_file_name (name
, d_index
, mod_time
, length
);
20638 /* Read directory table. */
20639 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20641 line_ptr
+= bytes_read
;
20642 lh
->add_include_dir (cur_dir
);
20644 line_ptr
+= bytes_read
;
20646 /* Read file name table. */
20647 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20649 unsigned int mod_time
, length
;
20652 line_ptr
+= bytes_read
;
20653 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20654 line_ptr
+= bytes_read
;
20655 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20656 line_ptr
+= bytes_read
;
20657 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20658 line_ptr
+= bytes_read
;
20660 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20662 line_ptr
+= bytes_read
;
20665 if (line_ptr
> (section
->buffer
+ section
->size
))
20666 complaint (_("line number info header doesn't "
20667 "fit in `.debug_line' section"));
20672 /* Subroutine of dwarf_decode_lines to simplify it.
20673 Return the file name of the psymtab for the given file_entry.
20674 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20675 If space for the result is malloc'd, *NAME_HOLDER will be set.
20676 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20678 static const char *
20679 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
20680 const struct partial_symtab
*pst
,
20681 const char *comp_dir
,
20682 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20684 const char *include_name
= fe
.name
;
20685 const char *include_name_to_compare
= include_name
;
20686 const char *pst_filename
;
20689 const char *dir_name
= fe
.include_dir (lh
);
20691 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20692 if (!IS_ABSOLUTE_PATH (include_name
)
20693 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20695 /* Avoid creating a duplicate psymtab for PST.
20696 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20697 Before we do the comparison, however, we need to account
20698 for DIR_NAME and COMP_DIR.
20699 First prepend dir_name (if non-NULL). If we still don't
20700 have an absolute path prepend comp_dir (if non-NULL).
20701 However, the directory we record in the include-file's
20702 psymtab does not contain COMP_DIR (to match the
20703 corresponding symtab(s)).
20708 bash$ gcc -g ./hello.c
20709 include_name = "hello.c"
20711 DW_AT_comp_dir = comp_dir = "/tmp"
20712 DW_AT_name = "./hello.c"
20716 if (dir_name
!= NULL
)
20718 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20719 include_name
, (char *) NULL
));
20720 include_name
= name_holder
->get ();
20721 include_name_to_compare
= include_name
;
20723 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20725 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20726 include_name
, (char *) NULL
));
20727 include_name_to_compare
= hold_compare
.get ();
20731 pst_filename
= pst
->filename
;
20732 gdb::unique_xmalloc_ptr
<char> copied_name
;
20733 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20735 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20736 pst_filename
, (char *) NULL
));
20737 pst_filename
= copied_name
.get ();
20740 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20744 return include_name
;
20747 /* State machine to track the state of the line number program. */
20749 class lnp_state_machine
20752 /* Initialize a machine state for the start of a line number
20754 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20755 bool record_lines_p
);
20757 file_entry
*current_file ()
20759 /* lh->file_names is 0-based, but the file name numbers in the
20760 statement program are 1-based. */
20761 return m_line_header
->file_name_at (m_file
);
20764 /* Record the line in the state machine. END_SEQUENCE is true if
20765 we're processing the end of a sequence. */
20766 void record_line (bool end_sequence
);
20768 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20769 nop-out rest of the lines in this sequence. */
20770 void check_line_address (struct dwarf2_cu
*cu
,
20771 const gdb_byte
*line_ptr
,
20772 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20774 void handle_set_discriminator (unsigned int discriminator
)
20776 m_discriminator
= discriminator
;
20777 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20780 /* Handle DW_LNE_set_address. */
20781 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20784 address
+= baseaddr
;
20785 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20788 /* Handle DW_LNS_advance_pc. */
20789 void handle_advance_pc (CORE_ADDR adjust
);
20791 /* Handle a special opcode. */
20792 void handle_special_opcode (unsigned char op_code
);
20794 /* Handle DW_LNS_advance_line. */
20795 void handle_advance_line (int line_delta
)
20797 advance_line (line_delta
);
20800 /* Handle DW_LNS_set_file. */
20801 void handle_set_file (file_name_index file
);
20803 /* Handle DW_LNS_negate_stmt. */
20804 void handle_negate_stmt ()
20806 m_is_stmt
= !m_is_stmt
;
20809 /* Handle DW_LNS_const_add_pc. */
20810 void handle_const_add_pc ();
20812 /* Handle DW_LNS_fixed_advance_pc. */
20813 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20815 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20819 /* Handle DW_LNS_copy. */
20820 void handle_copy ()
20822 record_line (false);
20823 m_discriminator
= 0;
20826 /* Handle DW_LNE_end_sequence. */
20827 void handle_end_sequence ()
20829 m_currently_recording_lines
= true;
20833 /* Advance the line by LINE_DELTA. */
20834 void advance_line (int line_delta
)
20836 m_line
+= line_delta
;
20838 if (line_delta
!= 0)
20839 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20842 struct dwarf2_cu
*m_cu
;
20844 gdbarch
*m_gdbarch
;
20846 /* True if we're recording lines.
20847 Otherwise we're building partial symtabs and are just interested in
20848 finding include files mentioned by the line number program. */
20849 bool m_record_lines_p
;
20851 /* The line number header. */
20852 line_header
*m_line_header
;
20854 /* These are part of the standard DWARF line number state machine,
20855 and initialized according to the DWARF spec. */
20857 unsigned char m_op_index
= 0;
20858 /* The line table index of the current file. */
20859 file_name_index m_file
= 1;
20860 unsigned int m_line
= 1;
20862 /* These are initialized in the constructor. */
20864 CORE_ADDR m_address
;
20866 unsigned int m_discriminator
;
20868 /* Additional bits of state we need to track. */
20870 /* The last file that we called dwarf2_start_subfile for.
20871 This is only used for TLLs. */
20872 unsigned int m_last_file
= 0;
20873 /* The last file a line number was recorded for. */
20874 struct subfile
*m_last_subfile
= NULL
;
20876 /* When true, record the lines we decode. */
20877 bool m_currently_recording_lines
= false;
20879 /* The last line number that was recorded, used to coalesce
20880 consecutive entries for the same line. This can happen, for
20881 example, when discriminators are present. PR 17276. */
20882 unsigned int m_last_line
= 0;
20883 bool m_line_has_non_zero_discriminator
= false;
20887 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20889 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20890 / m_line_header
->maximum_ops_per_instruction
)
20891 * m_line_header
->minimum_instruction_length
);
20892 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20893 m_op_index
= ((m_op_index
+ adjust
)
20894 % m_line_header
->maximum_ops_per_instruction
);
20898 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20900 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20901 CORE_ADDR addr_adj
= (((m_op_index
20902 + (adj_opcode
/ m_line_header
->line_range
))
20903 / m_line_header
->maximum_ops_per_instruction
)
20904 * m_line_header
->minimum_instruction_length
);
20905 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20906 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20907 % m_line_header
->maximum_ops_per_instruction
);
20909 int line_delta
= (m_line_header
->line_base
20910 + (adj_opcode
% m_line_header
->line_range
));
20911 advance_line (line_delta
);
20912 record_line (false);
20913 m_discriminator
= 0;
20917 lnp_state_machine::handle_set_file (file_name_index file
)
20921 const file_entry
*fe
= current_file ();
20923 dwarf2_debug_line_missing_file_complaint ();
20924 else if (m_record_lines_p
)
20926 const char *dir
= fe
->include_dir (m_line_header
);
20928 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20929 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20930 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20935 lnp_state_machine::handle_const_add_pc ()
20938 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20941 = (((m_op_index
+ adjust
)
20942 / m_line_header
->maximum_ops_per_instruction
)
20943 * m_line_header
->minimum_instruction_length
);
20945 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20946 m_op_index
= ((m_op_index
+ adjust
)
20947 % m_line_header
->maximum_ops_per_instruction
);
20950 /* Return non-zero if we should add LINE to the line number table.
20951 LINE is the line to add, LAST_LINE is the last line that was added,
20952 LAST_SUBFILE is the subfile for LAST_LINE.
20953 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20954 had a non-zero discriminator.
20956 We have to be careful in the presence of discriminators.
20957 E.g., for this line:
20959 for (i = 0; i < 100000; i++);
20961 clang can emit four line number entries for that one line,
20962 each with a different discriminator.
20963 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20965 However, we want gdb to coalesce all four entries into one.
20966 Otherwise the user could stepi into the middle of the line and
20967 gdb would get confused about whether the pc really was in the
20968 middle of the line.
20970 Things are further complicated by the fact that two consecutive
20971 line number entries for the same line is a heuristic used by gcc
20972 to denote the end of the prologue. So we can't just discard duplicate
20973 entries, we have to be selective about it. The heuristic we use is
20974 that we only collapse consecutive entries for the same line if at least
20975 one of those entries has a non-zero discriminator. PR 17276.
20977 Note: Addresses in the line number state machine can never go backwards
20978 within one sequence, thus this coalescing is ok. */
20981 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20982 unsigned int line
, unsigned int last_line
,
20983 int line_has_non_zero_discriminator
,
20984 struct subfile
*last_subfile
)
20986 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20988 if (line
!= last_line
)
20990 /* Same line for the same file that we've seen already.
20991 As a last check, for pr 17276, only record the line if the line
20992 has never had a non-zero discriminator. */
20993 if (!line_has_non_zero_discriminator
)
20998 /* Use the CU's builder to record line number LINE beginning at
20999 address ADDRESS in the line table of subfile SUBFILE. */
21002 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21003 unsigned int line
, CORE_ADDR address
,
21004 struct dwarf2_cu
*cu
)
21006 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
21008 if (dwarf_line_debug
)
21010 fprintf_unfiltered (gdb_stdlog
,
21011 "Recording line %u, file %s, address %s\n",
21012 line
, lbasename (subfile
->name
),
21013 paddress (gdbarch
, address
));
21017 cu
->get_builder ()->record_line (subfile
, line
, addr
);
21020 /* Subroutine of dwarf_decode_lines_1 to simplify it.
21021 Mark the end of a set of line number records.
21022 The arguments are the same as for dwarf_record_line_1.
21023 If SUBFILE is NULL the request is ignored. */
21026 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21027 CORE_ADDR address
, struct dwarf2_cu
*cu
)
21029 if (subfile
== NULL
)
21032 if (dwarf_line_debug
)
21034 fprintf_unfiltered (gdb_stdlog
,
21035 "Finishing current line, file %s, address %s\n",
21036 lbasename (subfile
->name
),
21037 paddress (gdbarch
, address
));
21040 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
21044 lnp_state_machine::record_line (bool end_sequence
)
21046 if (dwarf_line_debug
)
21048 fprintf_unfiltered (gdb_stdlog
,
21049 "Processing actual line %u: file %u,"
21050 " address %s, is_stmt %u, discrim %u\n",
21052 paddress (m_gdbarch
, m_address
),
21053 m_is_stmt
, m_discriminator
);
21056 file_entry
*fe
= current_file ();
21059 dwarf2_debug_line_missing_file_complaint ();
21060 /* For now we ignore lines not starting on an instruction boundary.
21061 But not when processing end_sequence for compatibility with the
21062 previous version of the code. */
21063 else if (m_op_index
== 0 || end_sequence
)
21065 fe
->included_p
= 1;
21066 if (m_record_lines_p
&& (producer_is_codewarrior (m_cu
) || m_is_stmt
))
21068 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
21071 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
21072 m_currently_recording_lines
? m_cu
: nullptr);
21077 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
21078 m_line_has_non_zero_discriminator
,
21081 buildsym_compunit
*builder
= m_cu
->get_builder ();
21082 dwarf_record_line_1 (m_gdbarch
,
21083 builder
->get_current_subfile (),
21085 m_currently_recording_lines
? m_cu
: nullptr);
21087 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21088 m_last_line
= m_line
;
21094 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
21095 line_header
*lh
, bool record_lines_p
)
21099 m_record_lines_p
= record_lines_p
;
21100 m_line_header
= lh
;
21102 m_currently_recording_lines
= true;
21104 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
21105 was a line entry for it so that the backend has a chance to adjust it
21106 and also record it in case it needs it. This is currently used by MIPS
21107 code, cf. `mips_adjust_dwarf2_line'. */
21108 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
21109 m_is_stmt
= lh
->default_is_stmt
;
21110 m_discriminator
= 0;
21114 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
21115 const gdb_byte
*line_ptr
,
21116 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
21118 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
21119 the pc range of the CU. However, we restrict the test to only ADDRESS
21120 values of zero to preserve GDB's previous behaviour which is to handle
21121 the specific case of a function being GC'd by the linker. */
21123 if (address
== 0 && address
< unrelocated_lowpc
)
21125 /* This line table is for a function which has been
21126 GCd by the linker. Ignore it. PR gdb/12528 */
21128 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21129 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
21131 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
21132 line_offset
, objfile_name (objfile
));
21133 m_currently_recording_lines
= false;
21134 /* Note: m_currently_recording_lines is left as false until we see
21135 DW_LNE_end_sequence. */
21139 /* Subroutine of dwarf_decode_lines to simplify it.
21140 Process the line number information in LH.
21141 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21142 program in order to set included_p for every referenced header. */
21145 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21146 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21148 const gdb_byte
*line_ptr
, *extended_end
;
21149 const gdb_byte
*line_end
;
21150 unsigned int bytes_read
, extended_len
;
21151 unsigned char op_code
, extended_op
;
21152 CORE_ADDR baseaddr
;
21153 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21154 bfd
*abfd
= objfile
->obfd
;
21155 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21156 /* True if we're recording line info (as opposed to building partial
21157 symtabs and just interested in finding include files mentioned by
21158 the line number program). */
21159 bool record_lines_p
= !decode_for_pst_p
;
21161 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21163 line_ptr
= lh
->statement_program_start
;
21164 line_end
= lh
->statement_program_end
;
21166 /* Read the statement sequences until there's nothing left. */
21167 while (line_ptr
< line_end
)
21169 /* The DWARF line number program state machine. Reset the state
21170 machine at the start of each sequence. */
21171 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21172 bool end_sequence
= false;
21174 if (record_lines_p
)
21176 /* Start a subfile for the current file of the state
21178 const file_entry
*fe
= state_machine
.current_file ();
21181 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21184 /* Decode the table. */
21185 while (line_ptr
< line_end
&& !end_sequence
)
21187 op_code
= read_1_byte (abfd
, line_ptr
);
21190 if (op_code
>= lh
->opcode_base
)
21192 /* Special opcode. */
21193 state_machine
.handle_special_opcode (op_code
);
21195 else switch (op_code
)
21197 case DW_LNS_extended_op
:
21198 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21200 line_ptr
+= bytes_read
;
21201 extended_end
= line_ptr
+ extended_len
;
21202 extended_op
= read_1_byte (abfd
, line_ptr
);
21204 switch (extended_op
)
21206 case DW_LNE_end_sequence
:
21207 state_machine
.handle_end_sequence ();
21208 end_sequence
= true;
21210 case DW_LNE_set_address
:
21213 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
21214 line_ptr
+= bytes_read
;
21216 state_machine
.check_line_address (cu
, line_ptr
,
21217 lowpc
- baseaddr
, address
);
21218 state_machine
.handle_set_address (baseaddr
, address
);
21221 case DW_LNE_define_file
:
21223 const char *cur_file
;
21224 unsigned int mod_time
, length
;
21227 cur_file
= read_direct_string (abfd
, line_ptr
,
21229 line_ptr
+= bytes_read
;
21230 dindex
= (dir_index
)
21231 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21232 line_ptr
+= bytes_read
;
21234 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21235 line_ptr
+= bytes_read
;
21237 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21238 line_ptr
+= bytes_read
;
21239 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21242 case DW_LNE_set_discriminator
:
21244 /* The discriminator is not interesting to the
21245 debugger; just ignore it. We still need to
21246 check its value though:
21247 if there are consecutive entries for the same
21248 (non-prologue) line we want to coalesce them.
21251 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21252 line_ptr
+= bytes_read
;
21254 state_machine
.handle_set_discriminator (discr
);
21258 complaint (_("mangled .debug_line section"));
21261 /* Make sure that we parsed the extended op correctly. If e.g.
21262 we expected a different address size than the producer used,
21263 we may have read the wrong number of bytes. */
21264 if (line_ptr
!= extended_end
)
21266 complaint (_("mangled .debug_line section"));
21271 state_machine
.handle_copy ();
21273 case DW_LNS_advance_pc
:
21276 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21277 line_ptr
+= bytes_read
;
21279 state_machine
.handle_advance_pc (adjust
);
21282 case DW_LNS_advance_line
:
21285 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21286 line_ptr
+= bytes_read
;
21288 state_machine
.handle_advance_line (line_delta
);
21291 case DW_LNS_set_file
:
21293 file_name_index file
21294 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21296 line_ptr
+= bytes_read
;
21298 state_machine
.handle_set_file (file
);
21301 case DW_LNS_set_column
:
21302 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21303 line_ptr
+= bytes_read
;
21305 case DW_LNS_negate_stmt
:
21306 state_machine
.handle_negate_stmt ();
21308 case DW_LNS_set_basic_block
:
21310 /* Add to the address register of the state machine the
21311 address increment value corresponding to special opcode
21312 255. I.e., this value is scaled by the minimum
21313 instruction length since special opcode 255 would have
21314 scaled the increment. */
21315 case DW_LNS_const_add_pc
:
21316 state_machine
.handle_const_add_pc ();
21318 case DW_LNS_fixed_advance_pc
:
21320 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21323 state_machine
.handle_fixed_advance_pc (addr_adj
);
21328 /* Unknown standard opcode, ignore it. */
21331 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21333 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21334 line_ptr
+= bytes_read
;
21341 dwarf2_debug_line_missing_end_sequence_complaint ();
21343 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21344 in which case we still finish recording the last line). */
21345 state_machine
.record_line (true);
21349 /* Decode the Line Number Program (LNP) for the given line_header
21350 structure and CU. The actual information extracted and the type
21351 of structures created from the LNP depends on the value of PST.
21353 1. If PST is NULL, then this procedure uses the data from the program
21354 to create all necessary symbol tables, and their linetables.
21356 2. If PST is not NULL, this procedure reads the program to determine
21357 the list of files included by the unit represented by PST, and
21358 builds all the associated partial symbol tables.
21360 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21361 It is used for relative paths in the line table.
21362 NOTE: When processing partial symtabs (pst != NULL),
21363 comp_dir == pst->dirname.
21365 NOTE: It is important that psymtabs have the same file name (via strcmp)
21366 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21367 symtab we don't use it in the name of the psymtabs we create.
21368 E.g. expand_line_sal requires this when finding psymtabs to expand.
21369 A good testcase for this is mb-inline.exp.
21371 LOWPC is the lowest address in CU (or 0 if not known).
21373 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21374 for its PC<->lines mapping information. Otherwise only the filename
21375 table is read in. */
21378 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21379 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21380 CORE_ADDR lowpc
, int decode_mapping
)
21382 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21383 const int decode_for_pst_p
= (pst
!= NULL
);
21385 if (decode_mapping
)
21386 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21388 if (decode_for_pst_p
)
21390 /* Now that we're done scanning the Line Header Program, we can
21391 create the psymtab of each included file. */
21392 for (auto &file_entry
: lh
->file_names ())
21393 if (file_entry
.included_p
== 1)
21395 gdb::unique_xmalloc_ptr
<char> name_holder
;
21396 const char *include_name
=
21397 psymtab_include_file_name (lh
, file_entry
, pst
,
21398 comp_dir
, &name_holder
);
21399 if (include_name
!= NULL
)
21400 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21405 /* Make sure a symtab is created for every file, even files
21406 which contain only variables (i.e. no code with associated
21408 buildsym_compunit
*builder
= cu
->get_builder ();
21409 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21411 for (auto &fe
: lh
->file_names ())
21413 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21414 if (builder
->get_current_subfile ()->symtab
== NULL
)
21416 builder
->get_current_subfile ()->symtab
21417 = allocate_symtab (cust
,
21418 builder
->get_current_subfile ()->name
);
21420 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21425 /* Start a subfile for DWARF. FILENAME is the name of the file and
21426 DIRNAME the name of the source directory which contains FILENAME
21427 or NULL if not known.
21428 This routine tries to keep line numbers from identical absolute and
21429 relative file names in a common subfile.
21431 Using the `list' example from the GDB testsuite, which resides in
21432 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21433 of /srcdir/list0.c yields the following debugging information for list0.c:
21435 DW_AT_name: /srcdir/list0.c
21436 DW_AT_comp_dir: /compdir
21437 files.files[0].name: list0.h
21438 files.files[0].dir: /srcdir
21439 files.files[1].name: list0.c
21440 files.files[1].dir: /srcdir
21442 The line number information for list0.c has to end up in a single
21443 subfile, so that `break /srcdir/list0.c:1' works as expected.
21444 start_subfile will ensure that this happens provided that we pass the
21445 concatenation of files.files[1].dir and files.files[1].name as the
21449 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21450 const char *dirname
)
21454 /* In order not to lose the line information directory,
21455 we concatenate it to the filename when it makes sense.
21456 Note that the Dwarf3 standard says (speaking of filenames in line
21457 information): ``The directory index is ignored for file names
21458 that represent full path names''. Thus ignoring dirname in the
21459 `else' branch below isn't an issue. */
21461 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21463 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21467 cu
->get_builder ()->start_subfile (filename
);
21473 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21474 buildsym_compunit constructor. */
21476 struct compunit_symtab
*
21477 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21480 gdb_assert (m_builder
== nullptr);
21482 m_builder
.reset (new struct buildsym_compunit
21483 (per_cu
->dwarf2_per_objfile
->objfile
,
21484 name
, comp_dir
, language
, low_pc
));
21486 list_in_scope
= get_builder ()->get_file_symbols ();
21488 get_builder ()->record_debugformat ("DWARF 2");
21489 get_builder ()->record_producer (producer
);
21491 processing_has_namespace_info
= false;
21493 return get_builder ()->get_compunit_symtab ();
21497 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21498 struct dwarf2_cu
*cu
)
21500 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21501 struct comp_unit_head
*cu_header
= &cu
->header
;
21503 /* NOTE drow/2003-01-30: There used to be a comment and some special
21504 code here to turn a symbol with DW_AT_external and a
21505 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21506 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21507 with some versions of binutils) where shared libraries could have
21508 relocations against symbols in their debug information - the
21509 minimal symbol would have the right address, but the debug info
21510 would not. It's no longer necessary, because we will explicitly
21511 apply relocations when we read in the debug information now. */
21513 /* A DW_AT_location attribute with no contents indicates that a
21514 variable has been optimized away. */
21515 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21517 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21521 /* Handle one degenerate form of location expression specially, to
21522 preserve GDB's previous behavior when section offsets are
21523 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21524 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21526 if (attr_form_is_block (attr
)
21527 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21528 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21529 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21530 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21531 && (DW_BLOCK (attr
)->size
21532 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21534 unsigned int dummy
;
21536 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21537 SET_SYMBOL_VALUE_ADDRESS (sym
,
21538 read_address (objfile
->obfd
,
21539 DW_BLOCK (attr
)->data
+ 1,
21542 SET_SYMBOL_VALUE_ADDRESS
21543 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
21545 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21546 fixup_symbol_section (sym
, objfile
);
21547 SET_SYMBOL_VALUE_ADDRESS (sym
,
21548 SYMBOL_VALUE_ADDRESS (sym
)
21549 + ANOFFSET (objfile
->section_offsets
,
21550 SYMBOL_SECTION (sym
)));
21554 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21555 expression evaluator, and use LOC_COMPUTED only when necessary
21556 (i.e. when the value of a register or memory location is
21557 referenced, or a thread-local block, etc.). Then again, it might
21558 not be worthwhile. I'm assuming that it isn't unless performance
21559 or memory numbers show me otherwise. */
21561 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21563 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21564 cu
->has_loclist
= true;
21567 /* Given a pointer to a DWARF information entry, figure out if we need
21568 to make a symbol table entry for it, and if so, create a new entry
21569 and return a pointer to it.
21570 If TYPE is NULL, determine symbol type from the die, otherwise
21571 used the passed type.
21572 If SPACE is not NULL, use it to hold the new symbol. If it is
21573 NULL, allocate a new symbol on the objfile's obstack. */
21575 static struct symbol
*
21576 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21577 struct symbol
*space
)
21579 struct dwarf2_per_objfile
*dwarf2_per_objfile
21580 = cu
->per_cu
->dwarf2_per_objfile
;
21581 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21582 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21583 struct symbol
*sym
= NULL
;
21585 struct attribute
*attr
= NULL
;
21586 struct attribute
*attr2
= NULL
;
21587 CORE_ADDR baseaddr
;
21588 struct pending
**list_to_add
= NULL
;
21590 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21592 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21594 name
= dwarf2_name (die
, cu
);
21597 const char *linkagename
;
21598 int suppress_add
= 0;
21603 sym
= allocate_symbol (objfile
);
21604 OBJSTAT (objfile
, n_syms
++);
21606 /* Cache this symbol's name and the name's demangled form (if any). */
21607 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21608 linkagename
= dwarf2_physname (name
, die
, cu
);
21609 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21611 /* Fortran does not have mangling standard and the mangling does differ
21612 between gfortran, iFort etc. */
21613 if (cu
->language
== language_fortran
21614 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21615 symbol_set_demangled_name (&(sym
->ginfo
),
21616 dwarf2_full_name (name
, die
, cu
),
21619 /* Default assumptions.
21620 Use the passed type or decode it from the die. */
21621 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21622 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21624 SYMBOL_TYPE (sym
) = type
;
21626 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21627 attr
= dwarf2_attr (die
,
21628 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21632 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21635 attr
= dwarf2_attr (die
,
21636 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21640 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21641 struct file_entry
*fe
;
21643 if (cu
->line_header
!= NULL
)
21644 fe
= cu
->line_header
->file_name_at (file_index
);
21649 complaint (_("file index out of range"));
21651 symbol_set_symtab (sym
, fe
->symtab
);
21657 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21662 addr
= attr_value_as_address (attr
);
21663 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21664 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
21666 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21667 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21668 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21669 add_symbol_to_list (sym
, cu
->list_in_scope
);
21671 case DW_TAG_subprogram
:
21672 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21674 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21675 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21676 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21677 || cu
->language
== language_ada
21678 || cu
->language
== language_fortran
)
21680 /* Subprograms marked external are stored as a global symbol.
21681 Ada and Fortran subprograms, whether marked external or
21682 not, are always stored as a global symbol, because we want
21683 to be able to access them globally. For instance, we want
21684 to be able to break on a nested subprogram without having
21685 to specify the context. */
21686 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21690 list_to_add
= cu
->list_in_scope
;
21693 case DW_TAG_inlined_subroutine
:
21694 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21696 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21697 SYMBOL_INLINED (sym
) = 1;
21698 list_to_add
= cu
->list_in_scope
;
21700 case DW_TAG_template_value_param
:
21702 /* Fall through. */
21703 case DW_TAG_constant
:
21704 case DW_TAG_variable
:
21705 case DW_TAG_member
:
21706 /* Compilation with minimal debug info may result in
21707 variables with missing type entries. Change the
21708 misleading `void' type to something sensible. */
21709 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21710 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21712 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21713 /* In the case of DW_TAG_member, we should only be called for
21714 static const members. */
21715 if (die
->tag
== DW_TAG_member
)
21717 /* dwarf2_add_field uses die_is_declaration,
21718 so we do the same. */
21719 gdb_assert (die_is_declaration (die
, cu
));
21724 dwarf2_const_value (attr
, sym
, cu
);
21725 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21728 if (attr2
&& (DW_UNSND (attr2
) != 0))
21729 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21731 list_to_add
= cu
->list_in_scope
;
21735 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21738 var_decode_location (attr
, sym
, cu
);
21739 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21741 /* Fortran explicitly imports any global symbols to the local
21742 scope by DW_TAG_common_block. */
21743 if (cu
->language
== language_fortran
&& die
->parent
21744 && die
->parent
->tag
== DW_TAG_common_block
)
21747 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21748 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21749 && !dwarf2_per_objfile
->has_section_at_zero
)
21751 /* When a static variable is eliminated by the linker,
21752 the corresponding debug information is not stripped
21753 out, but the variable address is set to null;
21754 do not add such variables into symbol table. */
21756 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21758 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21759 && (objfile
->flags
& OBJF_MAINLINE
) == 0
21760 && dwarf2_per_objfile
->can_copy
)
21762 /* A global static variable might be subject to
21763 copy relocation. We first check for a local
21764 minsym, though, because maybe the symbol was
21765 marked hidden, in which case this would not
21767 bound_minimal_symbol found
21768 = (lookup_minimal_symbol_linkage
21769 (SYMBOL_LINKAGE_NAME (sym
), objfile
));
21770 if (found
.minsym
!= nullptr)
21771 sym
->maybe_copied
= 1;
21774 /* A variable with DW_AT_external is never static,
21775 but it may be block-scoped. */
21777 = ((cu
->list_in_scope
21778 == cu
->get_builder ()->get_file_symbols ())
21779 ? cu
->get_builder ()->get_global_symbols ()
21780 : cu
->list_in_scope
);
21783 list_to_add
= cu
->list_in_scope
;
21787 /* We do not know the address of this symbol.
21788 If it is an external symbol and we have type information
21789 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21790 The address of the variable will then be determined from
21791 the minimal symbol table whenever the variable is
21793 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21795 /* Fortran explicitly imports any global symbols to the local
21796 scope by DW_TAG_common_block. */
21797 if (cu
->language
== language_fortran
&& die
->parent
21798 && die
->parent
->tag
== DW_TAG_common_block
)
21800 /* SYMBOL_CLASS doesn't matter here because
21801 read_common_block is going to reset it. */
21803 list_to_add
= cu
->list_in_scope
;
21805 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21806 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21808 /* A variable with DW_AT_external is never static, but it
21809 may be block-scoped. */
21811 = ((cu
->list_in_scope
21812 == cu
->get_builder ()->get_file_symbols ())
21813 ? cu
->get_builder ()->get_global_symbols ()
21814 : cu
->list_in_scope
);
21816 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21818 else if (!die_is_declaration (die
, cu
))
21820 /* Use the default LOC_OPTIMIZED_OUT class. */
21821 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21823 list_to_add
= cu
->list_in_scope
;
21827 case DW_TAG_formal_parameter
:
21829 /* If we are inside a function, mark this as an argument. If
21830 not, we might be looking at an argument to an inlined function
21831 when we do not have enough information to show inlined frames;
21832 pretend it's a local variable in that case so that the user can
21834 struct context_stack
*curr
21835 = cu
->get_builder ()->get_current_context_stack ();
21836 if (curr
!= nullptr && curr
->name
!= nullptr)
21837 SYMBOL_IS_ARGUMENT (sym
) = 1;
21838 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21841 var_decode_location (attr
, sym
, cu
);
21843 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21846 dwarf2_const_value (attr
, sym
, cu
);
21849 list_to_add
= cu
->list_in_scope
;
21852 case DW_TAG_unspecified_parameters
:
21853 /* From varargs functions; gdb doesn't seem to have any
21854 interest in this information, so just ignore it for now.
21857 case DW_TAG_template_type_param
:
21859 /* Fall through. */
21860 case DW_TAG_class_type
:
21861 case DW_TAG_interface_type
:
21862 case DW_TAG_structure_type
:
21863 case DW_TAG_union_type
:
21864 case DW_TAG_set_type
:
21865 case DW_TAG_enumeration_type
:
21866 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21867 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21870 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21871 really ever be static objects: otherwise, if you try
21872 to, say, break of a class's method and you're in a file
21873 which doesn't mention that class, it won't work unless
21874 the check for all static symbols in lookup_symbol_aux
21875 saves you. See the OtherFileClass tests in
21876 gdb.c++/namespace.exp. */
21880 buildsym_compunit
*builder
= cu
->get_builder ();
21882 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21883 && cu
->language
== language_cplus
21884 ? builder
->get_global_symbols ()
21885 : cu
->list_in_scope
);
21887 /* The semantics of C++ state that "struct foo {
21888 ... }" also defines a typedef for "foo". */
21889 if (cu
->language
== language_cplus
21890 || cu
->language
== language_ada
21891 || cu
->language
== language_d
21892 || cu
->language
== language_rust
)
21894 /* The symbol's name is already allocated along
21895 with this objfile, so we don't need to
21896 duplicate it for the type. */
21897 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21898 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21903 case DW_TAG_typedef
:
21904 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21905 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21906 list_to_add
= cu
->list_in_scope
;
21908 case DW_TAG_base_type
:
21909 case DW_TAG_subrange_type
:
21910 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21911 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21912 list_to_add
= cu
->list_in_scope
;
21914 case DW_TAG_enumerator
:
21915 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21918 dwarf2_const_value (attr
, sym
, cu
);
21921 /* NOTE: carlton/2003-11-10: See comment above in the
21922 DW_TAG_class_type, etc. block. */
21925 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21926 && cu
->language
== language_cplus
21927 ? cu
->get_builder ()->get_global_symbols ()
21928 : cu
->list_in_scope
);
21931 case DW_TAG_imported_declaration
:
21932 case DW_TAG_namespace
:
21933 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21934 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21936 case DW_TAG_module
:
21937 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21938 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21939 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21941 case DW_TAG_common_block
:
21942 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21943 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21944 add_symbol_to_list (sym
, cu
->list_in_scope
);
21947 /* Not a tag we recognize. Hopefully we aren't processing
21948 trash data, but since we must specifically ignore things
21949 we don't recognize, there is nothing else we should do at
21951 complaint (_("unsupported tag: '%s'"),
21952 dwarf_tag_name (die
->tag
));
21958 sym
->hash_next
= objfile
->template_symbols
;
21959 objfile
->template_symbols
= sym
;
21960 list_to_add
= NULL
;
21963 if (list_to_add
!= NULL
)
21964 add_symbol_to_list (sym
, list_to_add
);
21966 /* For the benefit of old versions of GCC, check for anonymous
21967 namespaces based on the demangled name. */
21968 if (!cu
->processing_has_namespace_info
21969 && cu
->language
== language_cplus
)
21970 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21975 /* Given an attr with a DW_FORM_dataN value in host byte order,
21976 zero-extend it as appropriate for the symbol's type. The DWARF
21977 standard (v4) is not entirely clear about the meaning of using
21978 DW_FORM_dataN for a constant with a signed type, where the type is
21979 wider than the data. The conclusion of a discussion on the DWARF
21980 list was that this is unspecified. We choose to always zero-extend
21981 because that is the interpretation long in use by GCC. */
21984 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21985 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21987 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21988 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21989 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21990 LONGEST l
= DW_UNSND (attr
);
21992 if (bits
< sizeof (*value
) * 8)
21994 l
&= ((LONGEST
) 1 << bits
) - 1;
21997 else if (bits
== sizeof (*value
) * 8)
22001 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
22002 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
22009 /* Read a constant value from an attribute. Either set *VALUE, or if
22010 the value does not fit in *VALUE, set *BYTES - either already
22011 allocated on the objfile obstack, or newly allocated on OBSTACK,
22012 or, set *BATON, if we translated the constant to a location
22016 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
22017 const char *name
, struct obstack
*obstack
,
22018 struct dwarf2_cu
*cu
,
22019 LONGEST
*value
, const gdb_byte
**bytes
,
22020 struct dwarf2_locexpr_baton
**baton
)
22022 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22023 struct comp_unit_head
*cu_header
= &cu
->header
;
22024 struct dwarf_block
*blk
;
22025 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
22026 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22032 switch (attr
->form
)
22035 case DW_FORM_addrx
:
22036 case DW_FORM_GNU_addr_index
:
22040 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
22041 dwarf2_const_value_length_mismatch_complaint (name
,
22042 cu_header
->addr_size
,
22043 TYPE_LENGTH (type
));
22044 /* Symbols of this form are reasonably rare, so we just
22045 piggyback on the existing location code rather than writing
22046 a new implementation of symbol_computed_ops. */
22047 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
22048 (*baton
)->per_cu
= cu
->per_cu
;
22049 gdb_assert ((*baton
)->per_cu
);
22051 (*baton
)->size
= 2 + cu_header
->addr_size
;
22052 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
22053 (*baton
)->data
= data
;
22055 data
[0] = DW_OP_addr
;
22056 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
22057 byte_order
, DW_ADDR (attr
));
22058 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
22061 case DW_FORM_string
:
22064 case DW_FORM_GNU_str_index
:
22065 case DW_FORM_GNU_strp_alt
:
22066 /* DW_STRING is already allocated on the objfile obstack, point
22068 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
22070 case DW_FORM_block1
:
22071 case DW_FORM_block2
:
22072 case DW_FORM_block4
:
22073 case DW_FORM_block
:
22074 case DW_FORM_exprloc
:
22075 case DW_FORM_data16
:
22076 blk
= DW_BLOCK (attr
);
22077 if (TYPE_LENGTH (type
) != blk
->size
)
22078 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
22079 TYPE_LENGTH (type
));
22080 *bytes
= blk
->data
;
22083 /* The DW_AT_const_value attributes are supposed to carry the
22084 symbol's value "represented as it would be on the target
22085 architecture." By the time we get here, it's already been
22086 converted to host endianness, so we just need to sign- or
22087 zero-extend it as appropriate. */
22088 case DW_FORM_data1
:
22089 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
22091 case DW_FORM_data2
:
22092 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
22094 case DW_FORM_data4
:
22095 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
22097 case DW_FORM_data8
:
22098 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
22101 case DW_FORM_sdata
:
22102 case DW_FORM_implicit_const
:
22103 *value
= DW_SND (attr
);
22106 case DW_FORM_udata
:
22107 *value
= DW_UNSND (attr
);
22111 complaint (_("unsupported const value attribute form: '%s'"),
22112 dwarf_form_name (attr
->form
));
22119 /* Copy constant value from an attribute to a symbol. */
22122 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
22123 struct dwarf2_cu
*cu
)
22125 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22127 const gdb_byte
*bytes
;
22128 struct dwarf2_locexpr_baton
*baton
;
22130 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
22131 SYMBOL_PRINT_NAME (sym
),
22132 &objfile
->objfile_obstack
, cu
,
22133 &value
, &bytes
, &baton
);
22137 SYMBOL_LOCATION_BATON (sym
) = baton
;
22138 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
22140 else if (bytes
!= NULL
)
22142 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22143 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22147 SYMBOL_VALUE (sym
) = value
;
22148 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22152 /* Return the type of the die in question using its DW_AT_type attribute. */
22154 static struct type
*
22155 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22157 struct attribute
*type_attr
;
22159 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22162 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22163 /* A missing DW_AT_type represents a void type. */
22164 return objfile_type (objfile
)->builtin_void
;
22167 return lookup_die_type (die
, type_attr
, cu
);
22170 /* True iff CU's producer generates GNAT Ada auxiliary information
22171 that allows to find parallel types through that information instead
22172 of having to do expensive parallel lookups by type name. */
22175 need_gnat_info (struct dwarf2_cu
*cu
)
22177 /* Assume that the Ada compiler was GNAT, which always produces
22178 the auxiliary information. */
22179 return (cu
->language
== language_ada
);
22182 /* Return the auxiliary type of the die in question using its
22183 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22184 attribute is not present. */
22186 static struct type
*
22187 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22189 struct attribute
*type_attr
;
22191 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22195 return lookup_die_type (die
, type_attr
, cu
);
22198 /* If DIE has a descriptive_type attribute, then set the TYPE's
22199 descriptive type accordingly. */
22202 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22203 struct dwarf2_cu
*cu
)
22205 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22207 if (descriptive_type
)
22209 ALLOCATE_GNAT_AUX_TYPE (type
);
22210 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22214 /* Return the containing type of the die in question using its
22215 DW_AT_containing_type attribute. */
22217 static struct type
*
22218 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22220 struct attribute
*type_attr
;
22221 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22223 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22225 error (_("Dwarf Error: Problem turning containing type into gdb type "
22226 "[in module %s]"), objfile_name (objfile
));
22228 return lookup_die_type (die
, type_attr
, cu
);
22231 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22233 static struct type
*
22234 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22236 struct dwarf2_per_objfile
*dwarf2_per_objfile
22237 = cu
->per_cu
->dwarf2_per_objfile
;
22238 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22241 std::string message
22242 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22243 objfile_name (objfile
),
22244 sect_offset_str (cu
->header
.sect_off
),
22245 sect_offset_str (die
->sect_off
));
22246 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
22248 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22251 /* Look up the type of DIE in CU using its type attribute ATTR.
22252 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22253 DW_AT_containing_type.
22254 If there is no type substitute an error marker. */
22256 static struct type
*
22257 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22258 struct dwarf2_cu
*cu
)
22260 struct dwarf2_per_objfile
*dwarf2_per_objfile
22261 = cu
->per_cu
->dwarf2_per_objfile
;
22262 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22263 struct type
*this_type
;
22265 gdb_assert (attr
->name
== DW_AT_type
22266 || attr
->name
== DW_AT_GNAT_descriptive_type
22267 || attr
->name
== DW_AT_containing_type
);
22269 /* First see if we have it cached. */
22271 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22273 struct dwarf2_per_cu_data
*per_cu
;
22274 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22276 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
22277 dwarf2_per_objfile
);
22278 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
22280 else if (attr_form_is_ref (attr
))
22282 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22284 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
22286 else if (attr
->form
== DW_FORM_ref_sig8
)
22288 ULONGEST signature
= DW_SIGNATURE (attr
);
22290 return get_signatured_type (die
, signature
, cu
);
22294 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22295 " at %s [in module %s]"),
22296 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22297 objfile_name (objfile
));
22298 return build_error_marker_type (cu
, die
);
22301 /* If not cached we need to read it in. */
22303 if (this_type
== NULL
)
22305 struct die_info
*type_die
= NULL
;
22306 struct dwarf2_cu
*type_cu
= cu
;
22308 if (attr_form_is_ref (attr
))
22309 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22310 if (type_die
== NULL
)
22311 return build_error_marker_type (cu
, die
);
22312 /* If we find the type now, it's probably because the type came
22313 from an inter-CU reference and the type's CU got expanded before
22315 this_type
= read_type_die (type_die
, type_cu
);
22318 /* If we still don't have a type use an error marker. */
22320 if (this_type
== NULL
)
22321 return build_error_marker_type (cu
, die
);
22326 /* Return the type in DIE, CU.
22327 Returns NULL for invalid types.
22329 This first does a lookup in die_type_hash,
22330 and only reads the die in if necessary.
22332 NOTE: This can be called when reading in partial or full symbols. */
22334 static struct type
*
22335 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22337 struct type
*this_type
;
22339 this_type
= get_die_type (die
, cu
);
22343 return read_type_die_1 (die
, cu
);
22346 /* Read the type in DIE, CU.
22347 Returns NULL for invalid types. */
22349 static struct type
*
22350 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22352 struct type
*this_type
= NULL
;
22356 case DW_TAG_class_type
:
22357 case DW_TAG_interface_type
:
22358 case DW_TAG_structure_type
:
22359 case DW_TAG_union_type
:
22360 this_type
= read_structure_type (die
, cu
);
22362 case DW_TAG_enumeration_type
:
22363 this_type
= read_enumeration_type (die
, cu
);
22365 case DW_TAG_subprogram
:
22366 case DW_TAG_subroutine_type
:
22367 case DW_TAG_inlined_subroutine
:
22368 this_type
= read_subroutine_type (die
, cu
);
22370 case DW_TAG_array_type
:
22371 this_type
= read_array_type (die
, cu
);
22373 case DW_TAG_set_type
:
22374 this_type
= read_set_type (die
, cu
);
22376 case DW_TAG_pointer_type
:
22377 this_type
= read_tag_pointer_type (die
, cu
);
22379 case DW_TAG_ptr_to_member_type
:
22380 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22382 case DW_TAG_reference_type
:
22383 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22385 case DW_TAG_rvalue_reference_type
:
22386 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22388 case DW_TAG_const_type
:
22389 this_type
= read_tag_const_type (die
, cu
);
22391 case DW_TAG_volatile_type
:
22392 this_type
= read_tag_volatile_type (die
, cu
);
22394 case DW_TAG_restrict_type
:
22395 this_type
= read_tag_restrict_type (die
, cu
);
22397 case DW_TAG_string_type
:
22398 this_type
= read_tag_string_type (die
, cu
);
22400 case DW_TAG_typedef
:
22401 this_type
= read_typedef (die
, cu
);
22403 case DW_TAG_subrange_type
:
22404 this_type
= read_subrange_type (die
, cu
);
22406 case DW_TAG_base_type
:
22407 this_type
= read_base_type (die
, cu
);
22409 case DW_TAG_unspecified_type
:
22410 this_type
= read_unspecified_type (die
, cu
);
22412 case DW_TAG_namespace
:
22413 this_type
= read_namespace_type (die
, cu
);
22415 case DW_TAG_module
:
22416 this_type
= read_module_type (die
, cu
);
22418 case DW_TAG_atomic_type
:
22419 this_type
= read_tag_atomic_type (die
, cu
);
22422 complaint (_("unexpected tag in read_type_die: '%s'"),
22423 dwarf_tag_name (die
->tag
));
22430 /* See if we can figure out if the class lives in a namespace. We do
22431 this by looking for a member function; its demangled name will
22432 contain namespace info, if there is any.
22433 Return the computed name or NULL.
22434 Space for the result is allocated on the objfile's obstack.
22435 This is the full-die version of guess_partial_die_structure_name.
22436 In this case we know DIE has no useful parent. */
22439 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22441 struct die_info
*spec_die
;
22442 struct dwarf2_cu
*spec_cu
;
22443 struct die_info
*child
;
22444 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22447 spec_die
= die_specification (die
, &spec_cu
);
22448 if (spec_die
!= NULL
)
22454 for (child
= die
->child
;
22456 child
= child
->sibling
)
22458 if (child
->tag
== DW_TAG_subprogram
)
22460 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22462 if (linkage_name
!= NULL
)
22465 = language_class_name_from_physname (cu
->language_defn
,
22469 if (actual_name
!= NULL
)
22471 const char *die_name
= dwarf2_name (die
, cu
);
22473 if (die_name
!= NULL
22474 && strcmp (die_name
, actual_name
) != 0)
22476 /* Strip off the class name from the full name.
22477 We want the prefix. */
22478 int die_name_len
= strlen (die_name
);
22479 int actual_name_len
= strlen (actual_name
);
22481 /* Test for '::' as a sanity check. */
22482 if (actual_name_len
> die_name_len
+ 2
22483 && actual_name
[actual_name_len
22484 - die_name_len
- 1] == ':')
22485 name
= obstack_strndup (
22486 &objfile
->per_bfd
->storage_obstack
,
22487 actual_name
, actual_name_len
- die_name_len
- 2);
22490 xfree (actual_name
);
22499 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22500 prefix part in such case. See
22501 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22503 static const char *
22504 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22506 struct attribute
*attr
;
22509 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22510 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22513 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22516 attr
= dw2_linkage_name_attr (die
, cu
);
22517 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22520 /* dwarf2_name had to be already called. */
22521 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22523 /* Strip the base name, keep any leading namespaces/classes. */
22524 base
= strrchr (DW_STRING (attr
), ':');
22525 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22528 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22529 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22531 &base
[-1] - DW_STRING (attr
));
22534 /* Return the name of the namespace/class that DIE is defined within,
22535 or "" if we can't tell. The caller should not xfree the result.
22537 For example, if we're within the method foo() in the following
22547 then determine_prefix on foo's die will return "N::C". */
22549 static const char *
22550 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22552 struct dwarf2_per_objfile
*dwarf2_per_objfile
22553 = cu
->per_cu
->dwarf2_per_objfile
;
22554 struct die_info
*parent
, *spec_die
;
22555 struct dwarf2_cu
*spec_cu
;
22556 struct type
*parent_type
;
22557 const char *retval
;
22559 if (cu
->language
!= language_cplus
22560 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22561 && cu
->language
!= language_rust
)
22564 retval
= anonymous_struct_prefix (die
, cu
);
22568 /* We have to be careful in the presence of DW_AT_specification.
22569 For example, with GCC 3.4, given the code
22573 // Definition of N::foo.
22577 then we'll have a tree of DIEs like this:
22579 1: DW_TAG_compile_unit
22580 2: DW_TAG_namespace // N
22581 3: DW_TAG_subprogram // declaration of N::foo
22582 4: DW_TAG_subprogram // definition of N::foo
22583 DW_AT_specification // refers to die #3
22585 Thus, when processing die #4, we have to pretend that we're in
22586 the context of its DW_AT_specification, namely the contex of die
22589 spec_die
= die_specification (die
, &spec_cu
);
22590 if (spec_die
== NULL
)
22591 parent
= die
->parent
;
22594 parent
= spec_die
->parent
;
22598 if (parent
== NULL
)
22600 else if (parent
->building_fullname
)
22603 const char *parent_name
;
22605 /* It has been seen on RealView 2.2 built binaries,
22606 DW_TAG_template_type_param types actually _defined_ as
22607 children of the parent class:
22610 template class <class Enum> Class{};
22611 Class<enum E> class_e;
22613 1: DW_TAG_class_type (Class)
22614 2: DW_TAG_enumeration_type (E)
22615 3: DW_TAG_enumerator (enum1:0)
22616 3: DW_TAG_enumerator (enum2:1)
22618 2: DW_TAG_template_type_param
22619 DW_AT_type DW_FORM_ref_udata (E)
22621 Besides being broken debug info, it can put GDB into an
22622 infinite loop. Consider:
22624 When we're building the full name for Class<E>, we'll start
22625 at Class, and go look over its template type parameters,
22626 finding E. We'll then try to build the full name of E, and
22627 reach here. We're now trying to build the full name of E,
22628 and look over the parent DIE for containing scope. In the
22629 broken case, if we followed the parent DIE of E, we'd again
22630 find Class, and once again go look at its template type
22631 arguments, etc., etc. Simply don't consider such parent die
22632 as source-level parent of this die (it can't be, the language
22633 doesn't allow it), and break the loop here. */
22634 name
= dwarf2_name (die
, cu
);
22635 parent_name
= dwarf2_name (parent
, cu
);
22636 complaint (_("template param type '%s' defined within parent '%s'"),
22637 name
? name
: "<unknown>",
22638 parent_name
? parent_name
: "<unknown>");
22642 switch (parent
->tag
)
22644 case DW_TAG_namespace
:
22645 parent_type
= read_type_die (parent
, cu
);
22646 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22647 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22648 Work around this problem here. */
22649 if (cu
->language
== language_cplus
22650 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22652 /* We give a name to even anonymous namespaces. */
22653 return TYPE_NAME (parent_type
);
22654 case DW_TAG_class_type
:
22655 case DW_TAG_interface_type
:
22656 case DW_TAG_structure_type
:
22657 case DW_TAG_union_type
:
22658 case DW_TAG_module
:
22659 parent_type
= read_type_die (parent
, cu
);
22660 if (TYPE_NAME (parent_type
) != NULL
)
22661 return TYPE_NAME (parent_type
);
22663 /* An anonymous structure is only allowed non-static data
22664 members; no typedefs, no member functions, et cetera.
22665 So it does not need a prefix. */
22667 case DW_TAG_compile_unit
:
22668 case DW_TAG_partial_unit
:
22669 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22670 if (cu
->language
== language_cplus
22671 && !dwarf2_per_objfile
->types
.empty ()
22672 && die
->child
!= NULL
22673 && (die
->tag
== DW_TAG_class_type
22674 || die
->tag
== DW_TAG_structure_type
22675 || die
->tag
== DW_TAG_union_type
))
22677 char *name
= guess_full_die_structure_name (die
, cu
);
22682 case DW_TAG_subprogram
:
22683 /* Nested subroutines in Fortran get a prefix with the name
22684 of the parent's subroutine. */
22685 if (cu
->language
== language_fortran
)
22687 if ((die
->tag
== DW_TAG_subprogram
)
22688 && (dwarf2_name (parent
, cu
) != NULL
))
22689 return dwarf2_name (parent
, cu
);
22691 return determine_prefix (parent
, cu
);
22692 case DW_TAG_enumeration_type
:
22693 parent_type
= read_type_die (parent
, cu
);
22694 if (TYPE_DECLARED_CLASS (parent_type
))
22696 if (TYPE_NAME (parent_type
) != NULL
)
22697 return TYPE_NAME (parent_type
);
22700 /* Fall through. */
22702 return determine_prefix (parent
, cu
);
22706 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22707 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22708 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22709 an obconcat, otherwise allocate storage for the result. The CU argument is
22710 used to determine the language and hence, the appropriate separator. */
22712 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22715 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22716 int physname
, struct dwarf2_cu
*cu
)
22718 const char *lead
= "";
22721 if (suffix
== NULL
|| suffix
[0] == '\0'
22722 || prefix
== NULL
|| prefix
[0] == '\0')
22724 else if (cu
->language
== language_d
)
22726 /* For D, the 'main' function could be defined in any module, but it
22727 should never be prefixed. */
22728 if (strcmp (suffix
, "D main") == 0)
22736 else if (cu
->language
== language_fortran
&& physname
)
22738 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22739 DW_AT_MIPS_linkage_name is preferred and used instead. */
22747 if (prefix
== NULL
)
22749 if (suffix
== NULL
)
22756 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22758 strcpy (retval
, lead
);
22759 strcat (retval
, prefix
);
22760 strcat (retval
, sep
);
22761 strcat (retval
, suffix
);
22766 /* We have an obstack. */
22767 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22771 /* Return sibling of die, NULL if no sibling. */
22773 static struct die_info
*
22774 sibling_die (struct die_info
*die
)
22776 return die
->sibling
;
22779 /* Get name of a die, return NULL if not found. */
22781 static const char *
22782 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22783 struct obstack
*obstack
)
22785 if (name
&& cu
->language
== language_cplus
)
22787 std::string canon_name
= cp_canonicalize_string (name
);
22789 if (!canon_name
.empty ())
22791 if (canon_name
!= name
)
22792 name
= obstack_strdup (obstack
, canon_name
);
22799 /* Get name of a die, return NULL if not found.
22800 Anonymous namespaces are converted to their magic string. */
22802 static const char *
22803 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22805 struct attribute
*attr
;
22806 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22808 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22809 if ((!attr
|| !DW_STRING (attr
))
22810 && die
->tag
!= DW_TAG_namespace
22811 && die
->tag
!= DW_TAG_class_type
22812 && die
->tag
!= DW_TAG_interface_type
22813 && die
->tag
!= DW_TAG_structure_type
22814 && die
->tag
!= DW_TAG_union_type
)
22819 case DW_TAG_compile_unit
:
22820 case DW_TAG_partial_unit
:
22821 /* Compilation units have a DW_AT_name that is a filename, not
22822 a source language identifier. */
22823 case DW_TAG_enumeration_type
:
22824 case DW_TAG_enumerator
:
22825 /* These tags always have simple identifiers already; no need
22826 to canonicalize them. */
22827 return DW_STRING (attr
);
22829 case DW_TAG_namespace
:
22830 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22831 return DW_STRING (attr
);
22832 return CP_ANONYMOUS_NAMESPACE_STR
;
22834 case DW_TAG_class_type
:
22835 case DW_TAG_interface_type
:
22836 case DW_TAG_structure_type
:
22837 case DW_TAG_union_type
:
22838 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22839 structures or unions. These were of the form "._%d" in GCC 4.1,
22840 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22841 and GCC 4.4. We work around this problem by ignoring these. */
22842 if (attr
&& DW_STRING (attr
)
22843 && (startswith (DW_STRING (attr
), "._")
22844 || startswith (DW_STRING (attr
), "<anonymous")))
22847 /* GCC might emit a nameless typedef that has a linkage name. See
22848 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22849 if (!attr
|| DW_STRING (attr
) == NULL
)
22851 char *demangled
= NULL
;
22853 attr
= dw2_linkage_name_attr (die
, cu
);
22854 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22857 /* Avoid demangling DW_STRING (attr) the second time on a second
22858 call for the same DIE. */
22859 if (!DW_STRING_IS_CANONICAL (attr
))
22860 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22866 /* FIXME: we already did this for the partial symbol... */
22868 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
22870 DW_STRING_IS_CANONICAL (attr
) = 1;
22873 /* Strip any leading namespaces/classes, keep only the base name.
22874 DW_AT_name for named DIEs does not contain the prefixes. */
22875 base
= strrchr (DW_STRING (attr
), ':');
22876 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22879 return DW_STRING (attr
);
22888 if (!DW_STRING_IS_CANONICAL (attr
))
22891 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22892 &objfile
->per_bfd
->storage_obstack
);
22893 DW_STRING_IS_CANONICAL (attr
) = 1;
22895 return DW_STRING (attr
);
22898 /* Return the die that this die in an extension of, or NULL if there
22899 is none. *EXT_CU is the CU containing DIE on input, and the CU
22900 containing the return value on output. */
22902 static struct die_info
*
22903 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22905 struct attribute
*attr
;
22907 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22911 return follow_die_ref (die
, attr
, ext_cu
);
22914 /* A convenience function that returns an "unknown" DWARF name,
22915 including the value of V. STR is the name of the entity being
22916 printed, e.g., "TAG". */
22918 static const char *
22919 dwarf_unknown (const char *str
, unsigned v
)
22921 char *cell
= get_print_cell ();
22922 xsnprintf (cell
, PRINT_CELL_SIZE
, "DW_%s_<unknown: %u>", str
, v
);
22926 /* Convert a DIE tag into its string name. */
22928 static const char *
22929 dwarf_tag_name (unsigned tag
)
22931 const char *name
= get_DW_TAG_name (tag
);
22934 return dwarf_unknown ("TAG", tag
);
22939 /* Convert a DWARF attribute code into its string name. */
22941 static const char *
22942 dwarf_attr_name (unsigned attr
)
22946 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22947 if (attr
== DW_AT_MIPS_fde
)
22948 return "DW_AT_MIPS_fde";
22950 if (attr
== DW_AT_HP_block_index
)
22951 return "DW_AT_HP_block_index";
22954 name
= get_DW_AT_name (attr
);
22957 return dwarf_unknown ("AT", attr
);
22962 /* Convert a unit type to corresponding DW_UT name. */
22964 static const char *
22965 dwarf_unit_type_name (int unit_type
) {
22969 return "DW_UT_compile (0x01)";
22971 return "DW_UT_type (0x02)";
22973 return "DW_UT_partial (0x03)";
22975 return "DW_UT_skeleton (0x04)";
22977 return "DW_UT_split_compile (0x05)";
22979 return "DW_UT_split_type (0x06)";
22981 return "DW_UT_lo_user (0x80)";
22983 return "DW_UT_hi_user (0xff)";
22989 /* Convert a DWARF value form code into its string name. */
22991 static const char *
22992 dwarf_form_name (unsigned form
)
22994 const char *name
= get_DW_FORM_name (form
);
22997 return dwarf_unknown ("FORM", form
);
23002 static const char *
23003 dwarf_bool_name (unsigned mybool
)
23011 /* Convert a DWARF type code into its string name. */
23013 static const char *
23014 dwarf_type_encoding_name (unsigned enc
)
23016 const char *name
= get_DW_ATE_name (enc
);
23019 return dwarf_unknown ("ATE", enc
);
23025 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
23029 print_spaces (indent
, f
);
23030 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
23031 dwarf_tag_name (die
->tag
), die
->abbrev
,
23032 sect_offset_str (die
->sect_off
));
23034 if (die
->parent
!= NULL
)
23036 print_spaces (indent
, f
);
23037 fprintf_unfiltered (f
, " parent at offset: %s\n",
23038 sect_offset_str (die
->parent
->sect_off
));
23041 print_spaces (indent
, f
);
23042 fprintf_unfiltered (f
, " has children: %s\n",
23043 dwarf_bool_name (die
->child
!= NULL
));
23045 print_spaces (indent
, f
);
23046 fprintf_unfiltered (f
, " attributes:\n");
23048 for (i
= 0; i
< die
->num_attrs
; ++i
)
23050 print_spaces (indent
, f
);
23051 fprintf_unfiltered (f
, " %s (%s) ",
23052 dwarf_attr_name (die
->attrs
[i
].name
),
23053 dwarf_form_name (die
->attrs
[i
].form
));
23055 switch (die
->attrs
[i
].form
)
23058 case DW_FORM_addrx
:
23059 case DW_FORM_GNU_addr_index
:
23060 fprintf_unfiltered (f
, "address: ");
23061 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
23063 case DW_FORM_block2
:
23064 case DW_FORM_block4
:
23065 case DW_FORM_block
:
23066 case DW_FORM_block1
:
23067 fprintf_unfiltered (f
, "block: size %s",
23068 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
23070 case DW_FORM_exprloc
:
23071 fprintf_unfiltered (f
, "expression: size %s",
23072 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
23074 case DW_FORM_data16
:
23075 fprintf_unfiltered (f
, "constant of 16 bytes");
23077 case DW_FORM_ref_addr
:
23078 fprintf_unfiltered (f
, "ref address: ");
23079 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
23081 case DW_FORM_GNU_ref_alt
:
23082 fprintf_unfiltered (f
, "alt ref address: ");
23083 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
23089 case DW_FORM_ref_udata
:
23090 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
23091 (long) (DW_UNSND (&die
->attrs
[i
])));
23093 case DW_FORM_data1
:
23094 case DW_FORM_data2
:
23095 case DW_FORM_data4
:
23096 case DW_FORM_data8
:
23097 case DW_FORM_udata
:
23098 case DW_FORM_sdata
:
23099 fprintf_unfiltered (f
, "constant: %s",
23100 pulongest (DW_UNSND (&die
->attrs
[i
])));
23102 case DW_FORM_sec_offset
:
23103 fprintf_unfiltered (f
, "section offset: %s",
23104 pulongest (DW_UNSND (&die
->attrs
[i
])));
23106 case DW_FORM_ref_sig8
:
23107 fprintf_unfiltered (f
, "signature: %s",
23108 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
23110 case DW_FORM_string
:
23112 case DW_FORM_line_strp
:
23114 case DW_FORM_GNU_str_index
:
23115 case DW_FORM_GNU_strp_alt
:
23116 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
23117 DW_STRING (&die
->attrs
[i
])
23118 ? DW_STRING (&die
->attrs
[i
]) : "",
23119 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
23122 if (DW_UNSND (&die
->attrs
[i
]))
23123 fprintf_unfiltered (f
, "flag: TRUE");
23125 fprintf_unfiltered (f
, "flag: FALSE");
23127 case DW_FORM_flag_present
:
23128 fprintf_unfiltered (f
, "flag: TRUE");
23130 case DW_FORM_indirect
:
23131 /* The reader will have reduced the indirect form to
23132 the "base form" so this form should not occur. */
23133 fprintf_unfiltered (f
,
23134 "unexpected attribute form: DW_FORM_indirect");
23136 case DW_FORM_implicit_const
:
23137 fprintf_unfiltered (f
, "constant: %s",
23138 plongest (DW_SND (&die
->attrs
[i
])));
23141 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
23142 die
->attrs
[i
].form
);
23145 fprintf_unfiltered (f
, "\n");
23150 dump_die_for_error (struct die_info
*die
)
23152 dump_die_shallow (gdb_stderr
, 0, die
);
23156 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
23158 int indent
= level
* 4;
23160 gdb_assert (die
!= NULL
);
23162 if (level
>= max_level
)
23165 dump_die_shallow (f
, indent
, die
);
23167 if (die
->child
!= NULL
)
23169 print_spaces (indent
, f
);
23170 fprintf_unfiltered (f
, " Children:");
23171 if (level
+ 1 < max_level
)
23173 fprintf_unfiltered (f
, "\n");
23174 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
23178 fprintf_unfiltered (f
,
23179 " [not printed, max nesting level reached]\n");
23183 if (die
->sibling
!= NULL
&& level
> 0)
23185 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23189 /* This is called from the pdie macro in gdbinit.in.
23190 It's not static so gcc will keep a copy callable from gdb. */
23193 dump_die (struct die_info
*die
, int max_level
)
23195 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23199 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23203 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23204 to_underlying (die
->sect_off
),
23210 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
23214 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
23216 if (attr_form_is_ref (attr
))
23217 return (sect_offset
) DW_UNSND (attr
);
23219 complaint (_("unsupported die ref attribute form: '%s'"),
23220 dwarf_form_name (attr
->form
));
23224 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
23225 * the value held by the attribute is not constant. */
23228 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
23230 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
23231 return DW_SND (attr
);
23232 else if (attr
->form
== DW_FORM_udata
23233 || attr
->form
== DW_FORM_data1
23234 || attr
->form
== DW_FORM_data2
23235 || attr
->form
== DW_FORM_data4
23236 || attr
->form
== DW_FORM_data8
)
23237 return DW_UNSND (attr
);
23240 /* For DW_FORM_data16 see attr_form_is_constant. */
23241 complaint (_("Attribute value is not a constant (%s)"),
23242 dwarf_form_name (attr
->form
));
23243 return default_value
;
23247 /* Follow reference or signature attribute ATTR of SRC_DIE.
23248 On entry *REF_CU is the CU of SRC_DIE.
23249 On exit *REF_CU is the CU of the result. */
23251 static struct die_info
*
23252 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23253 struct dwarf2_cu
**ref_cu
)
23255 struct die_info
*die
;
23257 if (attr_form_is_ref (attr
))
23258 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23259 else if (attr
->form
== DW_FORM_ref_sig8
)
23260 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23263 dump_die_for_error (src_die
);
23264 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23265 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23271 /* Follow reference OFFSET.
23272 On entry *REF_CU is the CU of the source die referencing OFFSET.
23273 On exit *REF_CU is the CU of the result.
23274 Returns NULL if OFFSET is invalid. */
23276 static struct die_info
*
23277 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23278 struct dwarf2_cu
**ref_cu
)
23280 struct die_info temp_die
;
23281 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23282 struct dwarf2_per_objfile
*dwarf2_per_objfile
23283 = cu
->per_cu
->dwarf2_per_objfile
;
23285 gdb_assert (cu
->per_cu
!= NULL
);
23289 if (cu
->per_cu
->is_debug_types
)
23291 /* .debug_types CUs cannot reference anything outside their CU.
23292 If they need to, they have to reference a signatured type via
23293 DW_FORM_ref_sig8. */
23294 if (!offset_in_cu_p (&cu
->header
, sect_off
))
23297 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23298 || !offset_in_cu_p (&cu
->header
, sect_off
))
23300 struct dwarf2_per_cu_data
*per_cu
;
23302 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23303 dwarf2_per_objfile
);
23305 /* If necessary, add it to the queue and load its DIEs. */
23306 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
23307 load_full_comp_unit (per_cu
, false, cu
->language
);
23309 target_cu
= per_cu
->cu
;
23311 else if (cu
->dies
== NULL
)
23313 /* We're loading full DIEs during partial symbol reading. */
23314 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
23315 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
23318 *ref_cu
= target_cu
;
23319 temp_die
.sect_off
= sect_off
;
23321 if (target_cu
!= cu
)
23322 target_cu
->ancestor
= cu
;
23324 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23326 to_underlying (sect_off
));
23329 /* Follow reference attribute ATTR of SRC_DIE.
23330 On entry *REF_CU is the CU of SRC_DIE.
23331 On exit *REF_CU is the CU of the result. */
23333 static struct die_info
*
23334 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23335 struct dwarf2_cu
**ref_cu
)
23337 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
23338 struct dwarf2_cu
*cu
= *ref_cu
;
23339 struct die_info
*die
;
23341 die
= follow_die_offset (sect_off
,
23342 (attr
->form
== DW_FORM_GNU_ref_alt
23343 || cu
->per_cu
->is_dwz
),
23346 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23347 "at %s [in module %s]"),
23348 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23349 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
23354 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
23355 Returned value is intended for DW_OP_call*. Returned
23356 dwarf2_locexpr_baton->data has lifetime of
23357 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
23359 struct dwarf2_locexpr_baton
23360 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23361 struct dwarf2_per_cu_data
*per_cu
,
23362 CORE_ADDR (*get_frame_pc
) (void *baton
),
23363 void *baton
, bool resolve_abstract_p
)
23365 struct dwarf2_cu
*cu
;
23366 struct die_info
*die
;
23367 struct attribute
*attr
;
23368 struct dwarf2_locexpr_baton retval
;
23369 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23370 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23372 if (per_cu
->cu
== NULL
)
23373 load_cu (per_cu
, false);
23377 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23378 Instead just throw an error, not much else we can do. */
23379 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23380 sect_offset_str (sect_off
), objfile_name (objfile
));
23383 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23385 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23386 sect_offset_str (sect_off
), objfile_name (objfile
));
23388 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23389 if (!attr
&& resolve_abstract_p
23390 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
23391 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
23393 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23395 = ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23396 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
23398 for (const auto &cand_off
23399 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
23401 struct dwarf2_cu
*cand_cu
= cu
;
23402 struct die_info
*cand
23403 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23406 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23409 CORE_ADDR pc_low
, pc_high
;
23410 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23411 if (pc_low
== ((CORE_ADDR
) -1))
23413 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
23414 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
23415 if (!(pc_low
<= pc
&& pc
< pc_high
))
23419 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23426 /* DWARF: "If there is no such attribute, then there is no effect.".
23427 DATA is ignored if SIZE is 0. */
23429 retval
.data
= NULL
;
23432 else if (attr_form_is_section_offset (attr
))
23434 struct dwarf2_loclist_baton loclist_baton
;
23435 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23438 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23440 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23442 retval
.size
= size
;
23446 if (!attr_form_is_block (attr
))
23447 error (_("Dwarf Error: DIE at %s referenced in module %s "
23448 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23449 sect_offset_str (sect_off
), objfile_name (objfile
));
23451 retval
.data
= DW_BLOCK (attr
)->data
;
23452 retval
.size
= DW_BLOCK (attr
)->size
;
23454 retval
.per_cu
= cu
->per_cu
;
23456 age_cached_comp_units (dwarf2_per_objfile
);
23461 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23464 struct dwarf2_locexpr_baton
23465 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23466 struct dwarf2_per_cu_data
*per_cu
,
23467 CORE_ADDR (*get_frame_pc
) (void *baton
),
23470 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23472 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23475 /* Write a constant of a given type as target-ordered bytes into
23478 static const gdb_byte
*
23479 write_constant_as_bytes (struct obstack
*obstack
,
23480 enum bfd_endian byte_order
,
23487 *len
= TYPE_LENGTH (type
);
23488 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23489 store_unsigned_integer (result
, *len
, byte_order
, value
);
23494 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23495 pointer to the constant bytes and set LEN to the length of the
23496 data. If memory is needed, allocate it on OBSTACK. If the DIE
23497 does not have a DW_AT_const_value, return NULL. */
23500 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23501 struct dwarf2_per_cu_data
*per_cu
,
23502 struct obstack
*obstack
,
23505 struct dwarf2_cu
*cu
;
23506 struct die_info
*die
;
23507 struct attribute
*attr
;
23508 const gdb_byte
*result
= NULL
;
23511 enum bfd_endian byte_order
;
23512 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23514 if (per_cu
->cu
== NULL
)
23515 load_cu (per_cu
, false);
23519 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23520 Instead just throw an error, not much else we can do. */
23521 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23522 sect_offset_str (sect_off
), objfile_name (objfile
));
23525 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23527 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23528 sect_offset_str (sect_off
), objfile_name (objfile
));
23530 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23534 byte_order
= (bfd_big_endian (objfile
->obfd
)
23535 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23537 switch (attr
->form
)
23540 case DW_FORM_addrx
:
23541 case DW_FORM_GNU_addr_index
:
23545 *len
= cu
->header
.addr_size
;
23546 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23547 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23551 case DW_FORM_string
:
23554 case DW_FORM_GNU_str_index
:
23555 case DW_FORM_GNU_strp_alt
:
23556 /* DW_STRING is already allocated on the objfile obstack, point
23558 result
= (const gdb_byte
*) DW_STRING (attr
);
23559 *len
= strlen (DW_STRING (attr
));
23561 case DW_FORM_block1
:
23562 case DW_FORM_block2
:
23563 case DW_FORM_block4
:
23564 case DW_FORM_block
:
23565 case DW_FORM_exprloc
:
23566 case DW_FORM_data16
:
23567 result
= DW_BLOCK (attr
)->data
;
23568 *len
= DW_BLOCK (attr
)->size
;
23571 /* The DW_AT_const_value attributes are supposed to carry the
23572 symbol's value "represented as it would be on the target
23573 architecture." By the time we get here, it's already been
23574 converted to host endianness, so we just need to sign- or
23575 zero-extend it as appropriate. */
23576 case DW_FORM_data1
:
23577 type
= die_type (die
, cu
);
23578 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23579 if (result
== NULL
)
23580 result
= write_constant_as_bytes (obstack
, byte_order
,
23583 case DW_FORM_data2
:
23584 type
= die_type (die
, cu
);
23585 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23586 if (result
== NULL
)
23587 result
= write_constant_as_bytes (obstack
, byte_order
,
23590 case DW_FORM_data4
:
23591 type
= die_type (die
, cu
);
23592 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23593 if (result
== NULL
)
23594 result
= write_constant_as_bytes (obstack
, byte_order
,
23597 case DW_FORM_data8
:
23598 type
= die_type (die
, cu
);
23599 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23600 if (result
== NULL
)
23601 result
= write_constant_as_bytes (obstack
, byte_order
,
23605 case DW_FORM_sdata
:
23606 case DW_FORM_implicit_const
:
23607 type
= die_type (die
, cu
);
23608 result
= write_constant_as_bytes (obstack
, byte_order
,
23609 type
, DW_SND (attr
), len
);
23612 case DW_FORM_udata
:
23613 type
= die_type (die
, cu
);
23614 result
= write_constant_as_bytes (obstack
, byte_order
,
23615 type
, DW_UNSND (attr
), len
);
23619 complaint (_("unsupported const value attribute form: '%s'"),
23620 dwarf_form_name (attr
->form
));
23627 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23628 valid type for this die is found. */
23631 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23632 struct dwarf2_per_cu_data
*per_cu
)
23634 struct dwarf2_cu
*cu
;
23635 struct die_info
*die
;
23637 if (per_cu
->cu
== NULL
)
23638 load_cu (per_cu
, false);
23643 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23647 return die_type (die
, cu
);
23650 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23654 dwarf2_get_die_type (cu_offset die_offset
,
23655 struct dwarf2_per_cu_data
*per_cu
)
23657 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23658 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23661 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23662 On entry *REF_CU is the CU of SRC_DIE.
23663 On exit *REF_CU is the CU of the result.
23664 Returns NULL if the referenced DIE isn't found. */
23666 static struct die_info
*
23667 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23668 struct dwarf2_cu
**ref_cu
)
23670 struct die_info temp_die
;
23671 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23672 struct die_info
*die
;
23674 /* While it might be nice to assert sig_type->type == NULL here,
23675 we can get here for DW_AT_imported_declaration where we need
23676 the DIE not the type. */
23678 /* If necessary, add it to the queue and load its DIEs. */
23680 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23681 read_signatured_type (sig_type
);
23683 sig_cu
= sig_type
->per_cu
.cu
;
23684 gdb_assert (sig_cu
!= NULL
);
23685 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23686 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23687 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23688 to_underlying (temp_die
.sect_off
));
23691 struct dwarf2_per_objfile
*dwarf2_per_objfile
23692 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23694 /* For .gdb_index version 7 keep track of included TUs.
23695 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23696 if (dwarf2_per_objfile
->index_table
!= NULL
23697 && dwarf2_per_objfile
->index_table
->version
<= 7)
23699 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
23704 sig_cu
->ancestor
= cu
;
23712 /* Follow signatured type referenced by ATTR in SRC_DIE.
23713 On entry *REF_CU is the CU of SRC_DIE.
23714 On exit *REF_CU is the CU of the result.
23715 The result is the DIE of the type.
23716 If the referenced type cannot be found an error is thrown. */
23718 static struct die_info
*
23719 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23720 struct dwarf2_cu
**ref_cu
)
23722 ULONGEST signature
= DW_SIGNATURE (attr
);
23723 struct signatured_type
*sig_type
;
23724 struct die_info
*die
;
23726 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23728 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23729 /* sig_type will be NULL if the signatured type is missing from
23731 if (sig_type
== NULL
)
23733 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23734 " from DIE at %s [in module %s]"),
23735 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23736 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23739 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23742 dump_die_for_error (src_die
);
23743 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23744 " from DIE at %s [in module %s]"),
23745 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23746 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23752 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23753 reading in and processing the type unit if necessary. */
23755 static struct type
*
23756 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23757 struct dwarf2_cu
*cu
)
23759 struct dwarf2_per_objfile
*dwarf2_per_objfile
23760 = cu
->per_cu
->dwarf2_per_objfile
;
23761 struct signatured_type
*sig_type
;
23762 struct dwarf2_cu
*type_cu
;
23763 struct die_info
*type_die
;
23766 sig_type
= lookup_signatured_type (cu
, signature
);
23767 /* sig_type will be NULL if the signatured type is missing from
23769 if (sig_type
== NULL
)
23771 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23772 " from DIE at %s [in module %s]"),
23773 hex_string (signature
), sect_offset_str (die
->sect_off
),
23774 objfile_name (dwarf2_per_objfile
->objfile
));
23775 return build_error_marker_type (cu
, die
);
23778 /* If we already know the type we're done. */
23779 if (sig_type
->type
!= NULL
)
23780 return sig_type
->type
;
23783 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23784 if (type_die
!= NULL
)
23786 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23787 is created. This is important, for example, because for c++ classes
23788 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23789 type
= read_type_die (type_die
, type_cu
);
23792 complaint (_("Dwarf Error: Cannot build signatured type %s"
23793 " referenced from DIE at %s [in module %s]"),
23794 hex_string (signature
), sect_offset_str (die
->sect_off
),
23795 objfile_name (dwarf2_per_objfile
->objfile
));
23796 type
= build_error_marker_type (cu
, die
);
23801 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23802 " from DIE at %s [in module %s]"),
23803 hex_string (signature
), sect_offset_str (die
->sect_off
),
23804 objfile_name (dwarf2_per_objfile
->objfile
));
23805 type
= build_error_marker_type (cu
, die
);
23807 sig_type
->type
= type
;
23812 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23813 reading in and processing the type unit if necessary. */
23815 static struct type
*
23816 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23817 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23819 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23820 if (attr_form_is_ref (attr
))
23822 struct dwarf2_cu
*type_cu
= cu
;
23823 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23825 return read_type_die (type_die
, type_cu
);
23827 else if (attr
->form
== DW_FORM_ref_sig8
)
23829 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23833 struct dwarf2_per_objfile
*dwarf2_per_objfile
23834 = cu
->per_cu
->dwarf2_per_objfile
;
23836 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23837 " at %s [in module %s]"),
23838 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23839 objfile_name (dwarf2_per_objfile
->objfile
));
23840 return build_error_marker_type (cu
, die
);
23844 /* Load the DIEs associated with type unit PER_CU into memory. */
23847 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23849 struct signatured_type
*sig_type
;
23851 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23852 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23854 /* We have the per_cu, but we need the signatured_type.
23855 Fortunately this is an easy translation. */
23856 gdb_assert (per_cu
->is_debug_types
);
23857 sig_type
= (struct signatured_type
*) per_cu
;
23859 gdb_assert (per_cu
->cu
== NULL
);
23861 read_signatured_type (sig_type
);
23863 gdb_assert (per_cu
->cu
!= NULL
);
23866 /* die_reader_func for read_signatured_type.
23867 This is identical to load_full_comp_unit_reader,
23868 but is kept separate for now. */
23871 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23872 const gdb_byte
*info_ptr
,
23873 struct die_info
*comp_unit_die
,
23877 struct dwarf2_cu
*cu
= reader
->cu
;
23879 gdb_assert (cu
->die_hash
== NULL
);
23881 htab_create_alloc_ex (cu
->header
.length
/ 12,
23885 &cu
->comp_unit_obstack
,
23886 hashtab_obstack_allocate
,
23887 dummy_obstack_deallocate
);
23890 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23891 &info_ptr
, comp_unit_die
);
23892 cu
->dies
= comp_unit_die
;
23893 /* comp_unit_die is not stored in die_hash, no need. */
23895 /* We try not to read any attributes in this function, because not
23896 all CUs needed for references have been loaded yet, and symbol
23897 table processing isn't initialized. But we have to set the CU language,
23898 or we won't be able to build types correctly.
23899 Similarly, if we do not read the producer, we can not apply
23900 producer-specific interpretation. */
23901 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23904 /* Read in a signatured type and build its CU and DIEs.
23905 If the type is a stub for the real type in a DWO file,
23906 read in the real type from the DWO file as well. */
23909 read_signatured_type (struct signatured_type
*sig_type
)
23911 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23913 gdb_assert (per_cu
->is_debug_types
);
23914 gdb_assert (per_cu
->cu
== NULL
);
23916 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23917 read_signatured_type_reader
, NULL
);
23918 sig_type
->per_cu
.tu_read
= 1;
23921 /* Decode simple location descriptions.
23922 Given a pointer to a dwarf block that defines a location, compute
23923 the location and return the value.
23925 NOTE drow/2003-11-18: This function is called in two situations
23926 now: for the address of static or global variables (partial symbols
23927 only) and for offsets into structures which are expected to be
23928 (more or less) constant. The partial symbol case should go away,
23929 and only the constant case should remain. That will let this
23930 function complain more accurately. A few special modes are allowed
23931 without complaint for global variables (for instance, global
23932 register values and thread-local values).
23934 A location description containing no operations indicates that the
23935 object is optimized out. The return value is 0 for that case.
23936 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23937 callers will only want a very basic result and this can become a
23940 Note that stack[0] is unused except as a default error return. */
23943 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23945 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23947 size_t size
= blk
->size
;
23948 const gdb_byte
*data
= blk
->data
;
23949 CORE_ADDR stack
[64];
23951 unsigned int bytes_read
, unsnd
;
23957 stack
[++stacki
] = 0;
23996 stack
[++stacki
] = op
- DW_OP_lit0
;
24031 stack
[++stacki
] = op
- DW_OP_reg0
;
24033 dwarf2_complex_location_expr_complaint ();
24037 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
24039 stack
[++stacki
] = unsnd
;
24041 dwarf2_complex_location_expr_complaint ();
24045 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
24050 case DW_OP_const1u
:
24051 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
24055 case DW_OP_const1s
:
24056 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
24060 case DW_OP_const2u
:
24061 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
24065 case DW_OP_const2s
:
24066 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
24070 case DW_OP_const4u
:
24071 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
24075 case DW_OP_const4s
:
24076 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
24080 case DW_OP_const8u
:
24081 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
24086 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
24092 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
24097 stack
[stacki
+ 1] = stack
[stacki
];
24102 stack
[stacki
- 1] += stack
[stacki
];
24106 case DW_OP_plus_uconst
:
24107 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
24113 stack
[stacki
- 1] -= stack
[stacki
];
24118 /* If we're not the last op, then we definitely can't encode
24119 this using GDB's address_class enum. This is valid for partial
24120 global symbols, although the variable's address will be bogus
24123 dwarf2_complex_location_expr_complaint ();
24126 case DW_OP_GNU_push_tls_address
:
24127 case DW_OP_form_tls_address
:
24128 /* The top of the stack has the offset from the beginning
24129 of the thread control block at which the variable is located. */
24130 /* Nothing should follow this operator, so the top of stack would
24132 /* This is valid for partial global symbols, but the variable's
24133 address will be bogus in the psymtab. Make it always at least
24134 non-zero to not look as a variable garbage collected by linker
24135 which have DW_OP_addr 0. */
24137 dwarf2_complex_location_expr_complaint ();
24141 case DW_OP_GNU_uninit
:
24145 case DW_OP_GNU_addr_index
:
24146 case DW_OP_GNU_const_index
:
24147 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
24154 const char *name
= get_DW_OP_name (op
);
24157 complaint (_("unsupported stack op: '%s'"),
24160 complaint (_("unsupported stack op: '%02x'"),
24164 return (stack
[stacki
]);
24167 /* Enforce maximum stack depth of SIZE-1 to avoid writing
24168 outside of the allocated space. Also enforce minimum>0. */
24169 if (stacki
>= ARRAY_SIZE (stack
) - 1)
24171 complaint (_("location description stack overflow"));
24177 complaint (_("location description stack underflow"));
24181 return (stack
[stacki
]);
24184 /* memory allocation interface */
24186 static struct dwarf_block
*
24187 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24189 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24192 static struct die_info
*
24193 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24195 struct die_info
*die
;
24196 size_t size
= sizeof (struct die_info
);
24199 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24201 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24202 memset (die
, 0, sizeof (struct die_info
));
24207 /* Macro support. */
24209 /* Return file name relative to the compilation directory of file number I in
24210 *LH's file name table. The result is allocated using xmalloc; the caller is
24211 responsible for freeing it. */
24214 file_file_name (int file
, struct line_header
*lh
)
24216 /* Is the file number a valid index into the line header's file name
24217 table? Remember that file numbers start with one, not zero. */
24218 if (lh
->is_valid_file_index (file
))
24220 const file_entry
*fe
= lh
->file_name_at (file
);
24222 if (!IS_ABSOLUTE_PATH (fe
->name
))
24224 const char *dir
= fe
->include_dir (lh
);
24226 return concat (dir
, SLASH_STRING
, fe
->name
, (char *) NULL
);
24228 return xstrdup (fe
->name
);
24232 /* The compiler produced a bogus file number. We can at least
24233 record the macro definitions made in the file, even if we
24234 won't be able to find the file by name. */
24235 char fake_name
[80];
24237 xsnprintf (fake_name
, sizeof (fake_name
),
24238 "<bad macro file number %d>", file
);
24240 complaint (_("bad file number in macro information (%d)"),
24243 return xstrdup (fake_name
);
24247 /* Return the full name of file number I in *LH's file name table.
24248 Use COMP_DIR as the name of the current directory of the
24249 compilation. The result is allocated using xmalloc; the caller is
24250 responsible for freeing it. */
24252 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
24254 /* Is the file number a valid index into the line header's file name
24255 table? Remember that file numbers start with one, not zero. */
24256 if (lh
->is_valid_file_index (file
))
24258 char *relative
= file_file_name (file
, lh
);
24260 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
24262 return reconcat (relative
, comp_dir
, SLASH_STRING
,
24263 relative
, (char *) NULL
);
24266 return file_file_name (file
, lh
);
24270 static struct macro_source_file
*
24271 macro_start_file (struct dwarf2_cu
*cu
,
24272 int file
, int line
,
24273 struct macro_source_file
*current_file
,
24274 struct line_header
*lh
)
24276 /* File name relative to the compilation directory of this source file. */
24277 char *file_name
= file_file_name (file
, lh
);
24279 if (! current_file
)
24281 /* Note: We don't create a macro table for this compilation unit
24282 at all until we actually get a filename. */
24283 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
24285 /* If we have no current file, then this must be the start_file
24286 directive for the compilation unit's main source file. */
24287 current_file
= macro_set_main (macro_table
, file_name
);
24288 macro_define_special (macro_table
);
24291 current_file
= macro_include (current_file
, line
, file_name
);
24295 return current_file
;
24298 static const char *
24299 consume_improper_spaces (const char *p
, const char *body
)
24303 complaint (_("macro definition contains spaces "
24304 "in formal argument list:\n`%s'"),
24316 parse_macro_definition (struct macro_source_file
*file
, int line
,
24321 /* The body string takes one of two forms. For object-like macro
24322 definitions, it should be:
24324 <macro name> " " <definition>
24326 For function-like macro definitions, it should be:
24328 <macro name> "() " <definition>
24330 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
24332 Spaces may appear only where explicitly indicated, and in the
24335 The Dwarf 2 spec says that an object-like macro's name is always
24336 followed by a space, but versions of GCC around March 2002 omit
24337 the space when the macro's definition is the empty string.
24339 The Dwarf 2 spec says that there should be no spaces between the
24340 formal arguments in a function-like macro's formal argument list,
24341 but versions of GCC around March 2002 include spaces after the
24345 /* Find the extent of the macro name. The macro name is terminated
24346 by either a space or null character (for an object-like macro) or
24347 an opening paren (for a function-like macro). */
24348 for (p
= body
; *p
; p
++)
24349 if (*p
== ' ' || *p
== '(')
24352 if (*p
== ' ' || *p
== '\0')
24354 /* It's an object-like macro. */
24355 int name_len
= p
- body
;
24356 char *name
= savestring (body
, name_len
);
24357 const char *replacement
;
24360 replacement
= body
+ name_len
+ 1;
24363 dwarf2_macro_malformed_definition_complaint (body
);
24364 replacement
= body
+ name_len
;
24367 macro_define_object (file
, line
, name
, replacement
);
24371 else if (*p
== '(')
24373 /* It's a function-like macro. */
24374 char *name
= savestring (body
, p
- body
);
24377 char **argv
= XNEWVEC (char *, argv_size
);
24381 p
= consume_improper_spaces (p
, body
);
24383 /* Parse the formal argument list. */
24384 while (*p
&& *p
!= ')')
24386 /* Find the extent of the current argument name. */
24387 const char *arg_start
= p
;
24389 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
24392 if (! *p
|| p
== arg_start
)
24393 dwarf2_macro_malformed_definition_complaint (body
);
24396 /* Make sure argv has room for the new argument. */
24397 if (argc
>= argv_size
)
24400 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24403 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24406 p
= consume_improper_spaces (p
, body
);
24408 /* Consume the comma, if present. */
24413 p
= consume_improper_spaces (p
, body
);
24422 /* Perfectly formed definition, no complaints. */
24423 macro_define_function (file
, line
, name
,
24424 argc
, (const char **) argv
,
24426 else if (*p
== '\0')
24428 /* Complain, but do define it. */
24429 dwarf2_macro_malformed_definition_complaint (body
);
24430 macro_define_function (file
, line
, name
,
24431 argc
, (const char **) argv
,
24435 /* Just complain. */
24436 dwarf2_macro_malformed_definition_complaint (body
);
24439 /* Just complain. */
24440 dwarf2_macro_malformed_definition_complaint (body
);
24446 for (i
= 0; i
< argc
; i
++)
24452 dwarf2_macro_malformed_definition_complaint (body
);
24455 /* Skip some bytes from BYTES according to the form given in FORM.
24456 Returns the new pointer. */
24458 static const gdb_byte
*
24459 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24460 enum dwarf_form form
,
24461 unsigned int offset_size
,
24462 struct dwarf2_section_info
*section
)
24464 unsigned int bytes_read
;
24468 case DW_FORM_data1
:
24473 case DW_FORM_data2
:
24477 case DW_FORM_data4
:
24481 case DW_FORM_data8
:
24485 case DW_FORM_data16
:
24489 case DW_FORM_string
:
24490 read_direct_string (abfd
, bytes
, &bytes_read
);
24491 bytes
+= bytes_read
;
24494 case DW_FORM_sec_offset
:
24496 case DW_FORM_GNU_strp_alt
:
24497 bytes
+= offset_size
;
24500 case DW_FORM_block
:
24501 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24502 bytes
+= bytes_read
;
24505 case DW_FORM_block1
:
24506 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24508 case DW_FORM_block2
:
24509 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24511 case DW_FORM_block4
:
24512 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24515 case DW_FORM_addrx
:
24516 case DW_FORM_sdata
:
24518 case DW_FORM_udata
:
24519 case DW_FORM_GNU_addr_index
:
24520 case DW_FORM_GNU_str_index
:
24521 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24524 dwarf2_section_buffer_overflow_complaint (section
);
24529 case DW_FORM_implicit_const
:
24534 complaint (_("invalid form 0x%x in `%s'"),
24535 form
, get_section_name (section
));
24543 /* A helper for dwarf_decode_macros that handles skipping an unknown
24544 opcode. Returns an updated pointer to the macro data buffer; or,
24545 on error, issues a complaint and returns NULL. */
24547 static const gdb_byte
*
24548 skip_unknown_opcode (unsigned int opcode
,
24549 const gdb_byte
**opcode_definitions
,
24550 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24552 unsigned int offset_size
,
24553 struct dwarf2_section_info
*section
)
24555 unsigned int bytes_read
, i
;
24557 const gdb_byte
*defn
;
24559 if (opcode_definitions
[opcode
] == NULL
)
24561 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24566 defn
= opcode_definitions
[opcode
];
24567 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24568 defn
+= bytes_read
;
24570 for (i
= 0; i
< arg
; ++i
)
24572 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24573 (enum dwarf_form
) defn
[i
], offset_size
,
24575 if (mac_ptr
== NULL
)
24577 /* skip_form_bytes already issued the complaint. */
24585 /* A helper function which parses the header of a macro section.
24586 If the macro section is the extended (for now called "GNU") type,
24587 then this updates *OFFSET_SIZE. Returns a pointer to just after
24588 the header, or issues a complaint and returns NULL on error. */
24590 static const gdb_byte
*
24591 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24593 const gdb_byte
*mac_ptr
,
24594 unsigned int *offset_size
,
24595 int section_is_gnu
)
24597 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24599 if (section_is_gnu
)
24601 unsigned int version
, flags
;
24603 version
= read_2_bytes (abfd
, mac_ptr
);
24604 if (version
!= 4 && version
!= 5)
24606 complaint (_("unrecognized version `%d' in .debug_macro section"),
24612 flags
= read_1_byte (abfd
, mac_ptr
);
24614 *offset_size
= (flags
& 1) ? 8 : 4;
24616 if ((flags
& 2) != 0)
24617 /* We don't need the line table offset. */
24618 mac_ptr
+= *offset_size
;
24620 /* Vendor opcode descriptions. */
24621 if ((flags
& 4) != 0)
24623 unsigned int i
, count
;
24625 count
= read_1_byte (abfd
, mac_ptr
);
24627 for (i
= 0; i
< count
; ++i
)
24629 unsigned int opcode
, bytes_read
;
24632 opcode
= read_1_byte (abfd
, mac_ptr
);
24634 opcode_definitions
[opcode
] = mac_ptr
;
24635 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24636 mac_ptr
+= bytes_read
;
24645 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24646 including DW_MACRO_import. */
24649 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24651 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24652 struct macro_source_file
*current_file
,
24653 struct line_header
*lh
,
24654 struct dwarf2_section_info
*section
,
24655 int section_is_gnu
, int section_is_dwz
,
24656 unsigned int offset_size
,
24657 htab_t include_hash
)
24659 struct dwarf2_per_objfile
*dwarf2_per_objfile
24660 = cu
->per_cu
->dwarf2_per_objfile
;
24661 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24662 enum dwarf_macro_record_type macinfo_type
;
24663 int at_commandline
;
24664 const gdb_byte
*opcode_definitions
[256];
24666 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24667 &offset_size
, section_is_gnu
);
24668 if (mac_ptr
== NULL
)
24670 /* We already issued a complaint. */
24674 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24675 GDB is still reading the definitions from command line. First
24676 DW_MACINFO_start_file will need to be ignored as it was already executed
24677 to create CURRENT_FILE for the main source holding also the command line
24678 definitions. On first met DW_MACINFO_start_file this flag is reset to
24679 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24681 at_commandline
= 1;
24685 /* Do we at least have room for a macinfo type byte? */
24686 if (mac_ptr
>= mac_end
)
24688 dwarf2_section_buffer_overflow_complaint (section
);
24692 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24695 /* Note that we rely on the fact that the corresponding GNU and
24696 DWARF constants are the same. */
24698 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24699 switch (macinfo_type
)
24701 /* A zero macinfo type indicates the end of the macro
24706 case DW_MACRO_define
:
24707 case DW_MACRO_undef
:
24708 case DW_MACRO_define_strp
:
24709 case DW_MACRO_undef_strp
:
24710 case DW_MACRO_define_sup
:
24711 case DW_MACRO_undef_sup
:
24713 unsigned int bytes_read
;
24718 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24719 mac_ptr
+= bytes_read
;
24721 if (macinfo_type
== DW_MACRO_define
24722 || macinfo_type
== DW_MACRO_undef
)
24724 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24725 mac_ptr
+= bytes_read
;
24729 LONGEST str_offset
;
24731 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24732 mac_ptr
+= offset_size
;
24734 if (macinfo_type
== DW_MACRO_define_sup
24735 || macinfo_type
== DW_MACRO_undef_sup
24738 struct dwz_file
*dwz
24739 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24741 body
= read_indirect_string_from_dwz (objfile
,
24745 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24749 is_define
= (macinfo_type
== DW_MACRO_define
24750 || macinfo_type
== DW_MACRO_define_strp
24751 || macinfo_type
== DW_MACRO_define_sup
);
24752 if (! current_file
)
24754 /* DWARF violation as no main source is present. */
24755 complaint (_("debug info with no main source gives macro %s "
24757 is_define
? _("definition") : _("undefinition"),
24761 if ((line
== 0 && !at_commandline
)
24762 || (line
!= 0 && at_commandline
))
24763 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24764 at_commandline
? _("command-line") : _("in-file"),
24765 is_define
? _("definition") : _("undefinition"),
24766 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24770 /* Fedora's rpm-build's "debugedit" binary
24771 corrupted .debug_macro sections.
24774 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24775 complaint (_("debug info gives %s invalid macro %s "
24776 "without body (corrupted?) at line %d "
24778 at_commandline
? _("command-line") : _("in-file"),
24779 is_define
? _("definition") : _("undefinition"),
24780 line
, current_file
->filename
);
24782 else if (is_define
)
24783 parse_macro_definition (current_file
, line
, body
);
24786 gdb_assert (macinfo_type
== DW_MACRO_undef
24787 || macinfo_type
== DW_MACRO_undef_strp
24788 || macinfo_type
== DW_MACRO_undef_sup
);
24789 macro_undef (current_file
, line
, body
);
24794 case DW_MACRO_start_file
:
24796 unsigned int bytes_read
;
24799 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24800 mac_ptr
+= bytes_read
;
24801 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24802 mac_ptr
+= bytes_read
;
24804 if ((line
== 0 && !at_commandline
)
24805 || (line
!= 0 && at_commandline
))
24806 complaint (_("debug info gives source %d included "
24807 "from %s at %s line %d"),
24808 file
, at_commandline
? _("command-line") : _("file"),
24809 line
== 0 ? _("zero") : _("non-zero"), line
);
24811 if (at_commandline
)
24813 /* This DW_MACRO_start_file was executed in the
24815 at_commandline
= 0;
24818 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24823 case DW_MACRO_end_file
:
24824 if (! current_file
)
24825 complaint (_("macro debug info has an unmatched "
24826 "`close_file' directive"));
24829 current_file
= current_file
->included_by
;
24830 if (! current_file
)
24832 enum dwarf_macro_record_type next_type
;
24834 /* GCC circa March 2002 doesn't produce the zero
24835 type byte marking the end of the compilation
24836 unit. Complain if it's not there, but exit no
24839 /* Do we at least have room for a macinfo type byte? */
24840 if (mac_ptr
>= mac_end
)
24842 dwarf2_section_buffer_overflow_complaint (section
);
24846 /* We don't increment mac_ptr here, so this is just
24849 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24851 if (next_type
!= 0)
24852 complaint (_("no terminating 0-type entry for "
24853 "macros in `.debug_macinfo' section"));
24860 case DW_MACRO_import
:
24861 case DW_MACRO_import_sup
:
24865 bfd
*include_bfd
= abfd
;
24866 struct dwarf2_section_info
*include_section
= section
;
24867 const gdb_byte
*include_mac_end
= mac_end
;
24868 int is_dwz
= section_is_dwz
;
24869 const gdb_byte
*new_mac_ptr
;
24871 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24872 mac_ptr
+= offset_size
;
24874 if (macinfo_type
== DW_MACRO_import_sup
)
24876 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24878 dwarf2_read_section (objfile
, &dwz
->macro
);
24880 include_section
= &dwz
->macro
;
24881 include_bfd
= get_section_bfd_owner (include_section
);
24882 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24886 new_mac_ptr
= include_section
->buffer
+ offset
;
24887 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24891 /* This has actually happened; see
24892 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24893 complaint (_("recursive DW_MACRO_import in "
24894 ".debug_macro section"));
24898 *slot
= (void *) new_mac_ptr
;
24900 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24901 include_mac_end
, current_file
, lh
,
24902 section
, section_is_gnu
, is_dwz
,
24903 offset_size
, include_hash
);
24905 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24910 case DW_MACINFO_vendor_ext
:
24911 if (!section_is_gnu
)
24913 unsigned int bytes_read
;
24915 /* This reads the constant, but since we don't recognize
24916 any vendor extensions, we ignore it. */
24917 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24918 mac_ptr
+= bytes_read
;
24919 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24920 mac_ptr
+= bytes_read
;
24922 /* We don't recognize any vendor extensions. */
24928 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24929 mac_ptr
, mac_end
, abfd
, offset_size
,
24931 if (mac_ptr
== NULL
)
24936 } while (macinfo_type
!= 0);
24940 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24941 int section_is_gnu
)
24943 struct dwarf2_per_objfile
*dwarf2_per_objfile
24944 = cu
->per_cu
->dwarf2_per_objfile
;
24945 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24946 struct line_header
*lh
= cu
->line_header
;
24948 const gdb_byte
*mac_ptr
, *mac_end
;
24949 struct macro_source_file
*current_file
= 0;
24950 enum dwarf_macro_record_type macinfo_type
;
24951 unsigned int offset_size
= cu
->header
.offset_size
;
24952 const gdb_byte
*opcode_definitions
[256];
24954 struct dwarf2_section_info
*section
;
24955 const char *section_name
;
24957 if (cu
->dwo_unit
!= NULL
)
24959 if (section_is_gnu
)
24961 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24962 section_name
= ".debug_macro.dwo";
24966 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24967 section_name
= ".debug_macinfo.dwo";
24972 if (section_is_gnu
)
24974 section
= &dwarf2_per_objfile
->macro
;
24975 section_name
= ".debug_macro";
24979 section
= &dwarf2_per_objfile
->macinfo
;
24980 section_name
= ".debug_macinfo";
24984 dwarf2_read_section (objfile
, section
);
24985 if (section
->buffer
== NULL
)
24987 complaint (_("missing %s section"), section_name
);
24990 abfd
= get_section_bfd_owner (section
);
24992 /* First pass: Find the name of the base filename.
24993 This filename is needed in order to process all macros whose definition
24994 (or undefinition) comes from the command line. These macros are defined
24995 before the first DW_MACINFO_start_file entry, and yet still need to be
24996 associated to the base file.
24998 To determine the base file name, we scan the macro definitions until we
24999 reach the first DW_MACINFO_start_file entry. We then initialize
25000 CURRENT_FILE accordingly so that any macro definition found before the
25001 first DW_MACINFO_start_file can still be associated to the base file. */
25003 mac_ptr
= section
->buffer
+ offset
;
25004 mac_end
= section
->buffer
+ section
->size
;
25006 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
25007 &offset_size
, section_is_gnu
);
25008 if (mac_ptr
== NULL
)
25010 /* We already issued a complaint. */
25016 /* Do we at least have room for a macinfo type byte? */
25017 if (mac_ptr
>= mac_end
)
25019 /* Complaint is printed during the second pass as GDB will probably
25020 stop the first pass earlier upon finding
25021 DW_MACINFO_start_file. */
25025 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
25028 /* Note that we rely on the fact that the corresponding GNU and
25029 DWARF constants are the same. */
25031 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
25032 switch (macinfo_type
)
25034 /* A zero macinfo type indicates the end of the macro
25039 case DW_MACRO_define
:
25040 case DW_MACRO_undef
:
25041 /* Only skip the data by MAC_PTR. */
25043 unsigned int bytes_read
;
25045 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25046 mac_ptr
+= bytes_read
;
25047 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
25048 mac_ptr
+= bytes_read
;
25052 case DW_MACRO_start_file
:
25054 unsigned int bytes_read
;
25057 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25058 mac_ptr
+= bytes_read
;
25059 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25060 mac_ptr
+= bytes_read
;
25062 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
25066 case DW_MACRO_end_file
:
25067 /* No data to skip by MAC_PTR. */
25070 case DW_MACRO_define_strp
:
25071 case DW_MACRO_undef_strp
:
25072 case DW_MACRO_define_sup
:
25073 case DW_MACRO_undef_sup
:
25075 unsigned int bytes_read
;
25077 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25078 mac_ptr
+= bytes_read
;
25079 mac_ptr
+= offset_size
;
25083 case DW_MACRO_import
:
25084 case DW_MACRO_import_sup
:
25085 /* Note that, according to the spec, a transparent include
25086 chain cannot call DW_MACRO_start_file. So, we can just
25087 skip this opcode. */
25088 mac_ptr
+= offset_size
;
25091 case DW_MACINFO_vendor_ext
:
25092 /* Only skip the data by MAC_PTR. */
25093 if (!section_is_gnu
)
25095 unsigned int bytes_read
;
25097 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25098 mac_ptr
+= bytes_read
;
25099 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
25100 mac_ptr
+= bytes_read
;
25105 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
25106 mac_ptr
, mac_end
, abfd
, offset_size
,
25108 if (mac_ptr
== NULL
)
25113 } while (macinfo_type
!= 0 && current_file
== NULL
);
25115 /* Second pass: Process all entries.
25117 Use the AT_COMMAND_LINE flag to determine whether we are still processing
25118 command-line macro definitions/undefinitions. This flag is unset when we
25119 reach the first DW_MACINFO_start_file entry. */
25121 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
25123 NULL
, xcalloc
, xfree
));
25124 mac_ptr
= section
->buffer
+ offset
;
25125 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
25126 *slot
= (void *) mac_ptr
;
25127 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
25128 current_file
, lh
, section
,
25129 section_is_gnu
, 0, offset_size
,
25130 include_hash
.get ());
25133 /* Check if the attribute's form is a DW_FORM_block*
25134 if so return true else false. */
25137 attr_form_is_block (const struct attribute
*attr
)
25139 return (attr
== NULL
? 0 :
25140 attr
->form
== DW_FORM_block1
25141 || attr
->form
== DW_FORM_block2
25142 || attr
->form
== DW_FORM_block4
25143 || attr
->form
== DW_FORM_block
25144 || attr
->form
== DW_FORM_exprloc
);
25147 /* Return non-zero if ATTR's value is a section offset --- classes
25148 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
25149 You may use DW_UNSND (attr) to retrieve such offsets.
25151 Section 7.5.4, "Attribute Encodings", explains that no attribute
25152 may have a value that belongs to more than one of these classes; it
25153 would be ambiguous if we did, because we use the same forms for all
25157 attr_form_is_section_offset (const struct attribute
*attr
)
25159 return (attr
->form
== DW_FORM_data4
25160 || attr
->form
== DW_FORM_data8
25161 || attr
->form
== DW_FORM_sec_offset
);
25164 /* Return non-zero if ATTR's value falls in the 'constant' class, or
25165 zero otherwise. When this function returns true, you can apply
25166 dwarf2_get_attr_constant_value to it.
25168 However, note that for some attributes you must check
25169 attr_form_is_section_offset before using this test. DW_FORM_data4
25170 and DW_FORM_data8 are members of both the constant class, and of
25171 the classes that contain offsets into other debug sections
25172 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
25173 that, if an attribute's can be either a constant or one of the
25174 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
25175 taken as section offsets, not constants.
25177 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
25178 cannot handle that. */
25181 attr_form_is_constant (const struct attribute
*attr
)
25183 switch (attr
->form
)
25185 case DW_FORM_sdata
:
25186 case DW_FORM_udata
:
25187 case DW_FORM_data1
:
25188 case DW_FORM_data2
:
25189 case DW_FORM_data4
:
25190 case DW_FORM_data8
:
25191 case DW_FORM_implicit_const
:
25199 /* DW_ADDR is always stored already as sect_offset; despite for the forms
25200 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
25203 attr_form_is_ref (const struct attribute
*attr
)
25205 switch (attr
->form
)
25207 case DW_FORM_ref_addr
:
25212 case DW_FORM_ref_udata
:
25213 case DW_FORM_GNU_ref_alt
:
25220 /* Return the .debug_loc section to use for CU.
25221 For DWO files use .debug_loc.dwo. */
25223 static struct dwarf2_section_info
*
25224 cu_debug_loc_section (struct dwarf2_cu
*cu
)
25226 struct dwarf2_per_objfile
*dwarf2_per_objfile
25227 = cu
->per_cu
->dwarf2_per_objfile
;
25231 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
25233 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
25235 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
25236 : &dwarf2_per_objfile
->loc
);
25239 /* A helper function that fills in a dwarf2_loclist_baton. */
25242 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
25243 struct dwarf2_loclist_baton
*baton
,
25244 const struct attribute
*attr
)
25246 struct dwarf2_per_objfile
*dwarf2_per_objfile
25247 = cu
->per_cu
->dwarf2_per_objfile
;
25248 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25250 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
25252 baton
->per_cu
= cu
->per_cu
;
25253 gdb_assert (baton
->per_cu
);
25254 /* We don't know how long the location list is, but make sure we
25255 don't run off the edge of the section. */
25256 baton
->size
= section
->size
- DW_UNSND (attr
);
25257 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
25258 baton
->base_address
= cu
->base_address
;
25259 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
25263 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
25264 struct dwarf2_cu
*cu
, int is_block
)
25266 struct dwarf2_per_objfile
*dwarf2_per_objfile
25267 = cu
->per_cu
->dwarf2_per_objfile
;
25268 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25269 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25271 if (attr_form_is_section_offset (attr
)
25272 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
25273 the section. If so, fall through to the complaint in the
25275 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
25277 struct dwarf2_loclist_baton
*baton
;
25279 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
25281 fill_in_loclist_baton (cu
, baton
, attr
);
25283 if (cu
->base_known
== 0)
25284 complaint (_("Location list used without "
25285 "specifying the CU base address."));
25287 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25288 ? dwarf2_loclist_block_index
25289 : dwarf2_loclist_index
);
25290 SYMBOL_LOCATION_BATON (sym
) = baton
;
25294 struct dwarf2_locexpr_baton
*baton
;
25296 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
25297 baton
->per_cu
= cu
->per_cu
;
25298 gdb_assert (baton
->per_cu
);
25300 if (attr_form_is_block (attr
))
25302 /* Note that we're just copying the block's data pointer
25303 here, not the actual data. We're still pointing into the
25304 info_buffer for SYM's objfile; right now we never release
25305 that buffer, but when we do clean up properly this may
25307 baton
->size
= DW_BLOCK (attr
)->size
;
25308 baton
->data
= DW_BLOCK (attr
)->data
;
25312 dwarf2_invalid_attrib_class_complaint ("location description",
25313 SYMBOL_NATURAL_NAME (sym
));
25317 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25318 ? dwarf2_locexpr_block_index
25319 : dwarf2_locexpr_index
);
25320 SYMBOL_LOCATION_BATON (sym
) = baton
;
25324 /* Return the OBJFILE associated with the compilation unit CU. If CU
25325 came from a separate debuginfo file, then the master objfile is
25329 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
25331 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25333 /* Return the master objfile, so that we can report and look up the
25334 correct file containing this variable. */
25335 if (objfile
->separate_debug_objfile_backlink
)
25336 objfile
= objfile
->separate_debug_objfile_backlink
;
25341 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
25342 (CU_HEADERP is unused in such case) or prepare a temporary copy at
25343 CU_HEADERP first. */
25345 static const struct comp_unit_head
*
25346 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
25347 struct dwarf2_per_cu_data
*per_cu
)
25349 const gdb_byte
*info_ptr
;
25352 return &per_cu
->cu
->header
;
25354 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
25356 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
25357 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
25358 rcuh_kind::COMPILE
);
25363 /* Return the address size given in the compilation unit header for CU. */
25366 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25368 struct comp_unit_head cu_header_local
;
25369 const struct comp_unit_head
*cu_headerp
;
25371 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25373 return cu_headerp
->addr_size
;
25376 /* Return the offset size given in the compilation unit header for CU. */
25379 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
25381 struct comp_unit_head cu_header_local
;
25382 const struct comp_unit_head
*cu_headerp
;
25384 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25386 return cu_headerp
->offset_size
;
25389 /* See its dwarf2loc.h declaration. */
25392 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25394 struct comp_unit_head cu_header_local
;
25395 const struct comp_unit_head
*cu_headerp
;
25397 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25399 if (cu_headerp
->version
== 2)
25400 return cu_headerp
->addr_size
;
25402 return cu_headerp
->offset_size
;
25405 /* Return the text offset of the CU. The returned offset comes from
25406 this CU's objfile. If this objfile came from a separate debuginfo
25407 file, then the offset may be different from the corresponding
25408 offset in the parent objfile. */
25411 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25413 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25415 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25418 /* Return a type that is a generic pointer type, the size of which matches
25419 the address size given in the compilation unit header for PER_CU. */
25420 static struct type
*
25421 dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
)
25423 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25424 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
25425 struct type
*addr_type
= lookup_pointer_type (void_type
);
25426 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
25428 if (TYPE_LENGTH (addr_type
) == addr_size
)
25432 = dwarf2_per_cu_addr_sized_int_type (per_cu
, TYPE_UNSIGNED (addr_type
));
25436 /* Return DWARF version number of PER_CU. */
25439 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25441 return per_cu
->dwarf_version
;
25444 /* Locate the .debug_info compilation unit from CU's objfile which contains
25445 the DIE at OFFSET. Raises an error on failure. */
25447 static struct dwarf2_per_cu_data
*
25448 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25449 unsigned int offset_in_dwz
,
25450 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25452 struct dwarf2_per_cu_data
*this_cu
;
25456 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
25459 struct dwarf2_per_cu_data
*mid_cu
;
25460 int mid
= low
+ (high
- low
) / 2;
25462 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25463 if (mid_cu
->is_dwz
> offset_in_dwz
25464 || (mid_cu
->is_dwz
== offset_in_dwz
25465 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
25470 gdb_assert (low
== high
);
25471 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25472 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
25474 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25475 error (_("Dwarf Error: could not find partial DIE containing "
25476 "offset %s [in module %s]"),
25477 sect_offset_str (sect_off
),
25478 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25480 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25482 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25486 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25487 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25488 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25489 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25494 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25496 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25497 : per_cu (per_cu_
),
25499 has_loclist (false),
25500 checked_producer (false),
25501 producer_is_gxx_lt_4_6 (false),
25502 producer_is_gcc_lt_4_3 (false),
25503 producer_is_icc (false),
25504 producer_is_icc_lt_14 (false),
25505 producer_is_codewarrior (false),
25506 processing_has_namespace_info (false)
25511 /* Destroy a dwarf2_cu. */
25513 dwarf2_cu::~dwarf2_cu ()
25518 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25521 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25522 enum language pretend_language
)
25524 struct attribute
*attr
;
25526 /* Set the language we're debugging. */
25527 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25529 set_cu_language (DW_UNSND (attr
), cu
);
25532 cu
->language
= pretend_language
;
25533 cu
->language_defn
= language_def (cu
->language
);
25536 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25539 /* Increase the age counter on each cached compilation unit, and free
25540 any that are too old. */
25543 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25545 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25547 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25548 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25549 while (per_cu
!= NULL
)
25551 per_cu
->cu
->last_used
++;
25552 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25553 dwarf2_mark (per_cu
->cu
);
25554 per_cu
= per_cu
->cu
->read_in_chain
;
25557 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25558 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25559 while (per_cu
!= NULL
)
25561 struct dwarf2_per_cu_data
*next_cu
;
25563 next_cu
= per_cu
->cu
->read_in_chain
;
25565 if (!per_cu
->cu
->mark
)
25568 *last_chain
= next_cu
;
25571 last_chain
= &per_cu
->cu
->read_in_chain
;
25577 /* Remove a single compilation unit from the cache. */
25580 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25582 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25583 struct dwarf2_per_objfile
*dwarf2_per_objfile
25584 = target_per_cu
->dwarf2_per_objfile
;
25586 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25587 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25588 while (per_cu
!= NULL
)
25590 struct dwarf2_per_cu_data
*next_cu
;
25592 next_cu
= per_cu
->cu
->read_in_chain
;
25594 if (per_cu
== target_per_cu
)
25598 *last_chain
= next_cu
;
25602 last_chain
= &per_cu
->cu
->read_in_chain
;
25608 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25609 We store these in a hash table separate from the DIEs, and preserve them
25610 when the DIEs are flushed out of cache.
25612 The CU "per_cu" pointer is needed because offset alone is not enough to
25613 uniquely identify the type. A file may have multiple .debug_types sections,
25614 or the type may come from a DWO file. Furthermore, while it's more logical
25615 to use per_cu->section+offset, with Fission the section with the data is in
25616 the DWO file but we don't know that section at the point we need it.
25617 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25618 because we can enter the lookup routine, get_die_type_at_offset, from
25619 outside this file, and thus won't necessarily have PER_CU->cu.
25620 Fortunately, PER_CU is stable for the life of the objfile. */
25622 struct dwarf2_per_cu_offset_and_type
25624 const struct dwarf2_per_cu_data
*per_cu
;
25625 sect_offset sect_off
;
25629 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25632 per_cu_offset_and_type_hash (const void *item
)
25634 const struct dwarf2_per_cu_offset_and_type
*ofs
25635 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25637 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25640 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25643 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25645 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25646 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25647 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25648 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25650 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25651 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25654 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25655 table if necessary. For convenience, return TYPE.
25657 The DIEs reading must have careful ordering to:
25658 * Not cause infinite loops trying to read in DIEs as a prerequisite for
25659 reading current DIE.
25660 * Not trying to dereference contents of still incompletely read in types
25661 while reading in other DIEs.
25662 * Enable referencing still incompletely read in types just by a pointer to
25663 the type without accessing its fields.
25665 Therefore caller should follow these rules:
25666 * Try to fetch any prerequisite types we may need to build this DIE type
25667 before building the type and calling set_die_type.
25668 * After building type call set_die_type for current DIE as soon as
25669 possible before fetching more types to complete the current type.
25670 * Make the type as complete as possible before fetching more types. */
25672 static struct type
*
25673 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25675 struct dwarf2_per_objfile
*dwarf2_per_objfile
25676 = cu
->per_cu
->dwarf2_per_objfile
;
25677 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25678 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25679 struct attribute
*attr
;
25680 struct dynamic_prop prop
;
25682 /* For Ada types, make sure that the gnat-specific data is always
25683 initialized (if not already set). There are a few types where
25684 we should not be doing so, because the type-specific area is
25685 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25686 where the type-specific area is used to store the floatformat).
25687 But this is not a problem, because the gnat-specific information
25688 is actually not needed for these types. */
25689 if (need_gnat_info (cu
)
25690 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25691 && TYPE_CODE (type
) != TYPE_CODE_FLT
25692 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25693 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25694 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25695 && !HAVE_GNAT_AUX_INFO (type
))
25696 INIT_GNAT_SPECIFIC (type
);
25698 /* Read DW_AT_allocated and set in type. */
25699 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25700 if (attr_form_is_block (attr
))
25702 struct type
*prop_type
25703 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25704 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25705 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25707 else if (attr
!= NULL
)
25709 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25710 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25711 sect_offset_str (die
->sect_off
));
25714 /* Read DW_AT_associated and set in type. */
25715 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25716 if (attr_form_is_block (attr
))
25718 struct type
*prop_type
25719 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25720 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25721 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25723 else if (attr
!= NULL
)
25725 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25726 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25727 sect_offset_str (die
->sect_off
));
25730 /* Read DW_AT_data_location and set in type. */
25731 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25732 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
25733 dwarf2_per_cu_addr_type (cu
->per_cu
)))
25734 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25736 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25738 dwarf2_per_objfile
->die_type_hash
=
25739 htab_create_alloc_ex (127,
25740 per_cu_offset_and_type_hash
,
25741 per_cu_offset_and_type_eq
,
25743 &objfile
->objfile_obstack
,
25744 hashtab_obstack_allocate
,
25745 dummy_obstack_deallocate
);
25748 ofs
.per_cu
= cu
->per_cu
;
25749 ofs
.sect_off
= die
->sect_off
;
25751 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25752 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25754 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25755 sect_offset_str (die
->sect_off
));
25756 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25757 struct dwarf2_per_cu_offset_and_type
);
25762 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25763 or return NULL if the die does not have a saved type. */
25765 static struct type
*
25766 get_die_type_at_offset (sect_offset sect_off
,
25767 struct dwarf2_per_cu_data
*per_cu
)
25769 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25770 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25772 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25775 ofs
.per_cu
= per_cu
;
25776 ofs
.sect_off
= sect_off
;
25777 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25778 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25785 /* Look up the type for DIE in CU in die_type_hash,
25786 or return NULL if DIE does not have a saved type. */
25788 static struct type
*
25789 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25791 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25794 /* Add a dependence relationship from CU to REF_PER_CU. */
25797 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25798 struct dwarf2_per_cu_data
*ref_per_cu
)
25802 if (cu
->dependencies
== NULL
)
25804 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25805 NULL
, &cu
->comp_unit_obstack
,
25806 hashtab_obstack_allocate
,
25807 dummy_obstack_deallocate
);
25809 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25811 *slot
= ref_per_cu
;
25814 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25815 Set the mark field in every compilation unit in the
25816 cache that we must keep because we are keeping CU. */
25819 dwarf2_mark_helper (void **slot
, void *data
)
25821 struct dwarf2_per_cu_data
*per_cu
;
25823 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25825 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25826 reading of the chain. As such dependencies remain valid it is not much
25827 useful to track and undo them during QUIT cleanups. */
25828 if (per_cu
->cu
== NULL
)
25831 if (per_cu
->cu
->mark
)
25833 per_cu
->cu
->mark
= true;
25835 if (per_cu
->cu
->dependencies
!= NULL
)
25836 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25841 /* Set the mark field in CU and in every other compilation unit in the
25842 cache that we must keep because we are keeping CU. */
25845 dwarf2_mark (struct dwarf2_cu
*cu
)
25850 if (cu
->dependencies
!= NULL
)
25851 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25855 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25859 per_cu
->cu
->mark
= false;
25860 per_cu
= per_cu
->cu
->read_in_chain
;
25864 /* Trivial hash function for partial_die_info: the hash value of a DIE
25865 is its offset in .debug_info for this objfile. */
25868 partial_die_hash (const void *item
)
25870 const struct partial_die_info
*part_die
25871 = (const struct partial_die_info
*) item
;
25873 return to_underlying (part_die
->sect_off
);
25876 /* Trivial comparison function for partial_die_info structures: two DIEs
25877 are equal if they have the same offset. */
25880 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25882 const struct partial_die_info
*part_die_lhs
25883 = (const struct partial_die_info
*) item_lhs
;
25884 const struct partial_die_info
*part_die_rhs
25885 = (const struct partial_die_info
*) item_rhs
;
25887 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25890 struct cmd_list_element
*set_dwarf_cmdlist
;
25891 struct cmd_list_element
*show_dwarf_cmdlist
;
25894 set_dwarf_cmd (const char *args
, int from_tty
)
25896 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25901 show_dwarf_cmd (const char *args
, int from_tty
)
25903 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25906 bool dwarf_always_disassemble
;
25909 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25910 struct cmd_list_element
*c
, const char *value
)
25912 fprintf_filtered (file
,
25913 _("Whether to always disassemble "
25914 "DWARF expressions is %s.\n"),
25919 show_check_physname (struct ui_file
*file
, int from_tty
,
25920 struct cmd_list_element
*c
, const char *value
)
25922 fprintf_filtered (file
,
25923 _("Whether to check \"physname\" is %s.\n"),
25928 _initialize_dwarf2_read (void)
25930 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25931 Set DWARF specific variables.\n\
25932 Configure DWARF variables such as the cache size."),
25933 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25934 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25936 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25937 Show DWARF specific variables.\n\
25938 Show DWARF variables such as the cache size."),
25939 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25940 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25942 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25943 &dwarf_max_cache_age
, _("\
25944 Set the upper bound on the age of cached DWARF compilation units."), _("\
25945 Show the upper bound on the age of cached DWARF compilation units."), _("\
25946 A higher limit means that cached compilation units will be stored\n\
25947 in memory longer, and more total memory will be used. Zero disables\n\
25948 caching, which can slow down startup."),
25950 show_dwarf_max_cache_age
,
25951 &set_dwarf_cmdlist
,
25952 &show_dwarf_cmdlist
);
25954 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25955 &dwarf_always_disassemble
, _("\
25956 Set whether `info address' always disassembles DWARF expressions."), _("\
25957 Show whether `info address' always disassembles DWARF expressions."), _("\
25958 When enabled, DWARF expressions are always printed in an assembly-like\n\
25959 syntax. When disabled, expressions will be printed in a more\n\
25960 conversational style, when possible."),
25962 show_dwarf_always_disassemble
,
25963 &set_dwarf_cmdlist
,
25964 &show_dwarf_cmdlist
);
25966 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25967 Set debugging of the DWARF reader."), _("\
25968 Show debugging of the DWARF reader."), _("\
25969 When enabled (non-zero), debugging messages are printed during DWARF\n\
25970 reading and symtab expansion. A value of 1 (one) provides basic\n\
25971 information. A value greater than 1 provides more verbose information."),
25974 &setdebuglist
, &showdebuglist
);
25976 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25977 Set debugging of the DWARF DIE reader."), _("\
25978 Show debugging of the DWARF DIE reader."), _("\
25979 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25980 The value is the maximum depth to print."),
25983 &setdebuglist
, &showdebuglist
);
25985 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25986 Set debugging of the dwarf line reader."), _("\
25987 Show debugging of the dwarf line reader."), _("\
25988 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25989 A value of 1 (one) provides basic information.\n\
25990 A value greater than 1 provides more verbose information."),
25993 &setdebuglist
, &showdebuglist
);
25995 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25996 Set cross-checking of \"physname\" code against demangler."), _("\
25997 Show cross-checking of \"physname\" code against demangler."), _("\
25998 When enabled, GDB's internal \"physname\" code is checked against\n\
26000 NULL
, show_check_physname
,
26001 &setdebuglist
, &showdebuglist
);
26003 add_setshow_boolean_cmd ("use-deprecated-index-sections",
26004 no_class
, &use_deprecated_index_sections
, _("\
26005 Set whether to use deprecated gdb_index sections."), _("\
26006 Show whether to use deprecated gdb_index sections."), _("\
26007 When enabled, deprecated .gdb_index sections are used anyway.\n\
26008 Normally they are ignored either because of a missing feature or\n\
26009 performance issue.\n\
26010 Warning: This option must be enabled before gdb reads the file."),
26013 &setlist
, &showlist
);
26015 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
26016 &dwarf2_locexpr_funcs
);
26017 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
26018 &dwarf2_loclist_funcs
);
26020 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
26021 &dwarf2_block_frame_base_locexpr_funcs
);
26022 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
26023 &dwarf2_block_frame_base_loclist_funcs
);
26026 selftests::register_test ("dw2_expand_symtabs_matching",
26027 selftests::dw2_expand_symtabs_matching::run_test
);