1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2020 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 "dwarf2/read.h"
33 #include "dwarf2/abbrev.h"
34 #include "dwarf2/attribute.h"
35 #include "dwarf2/index-cache.h"
36 #include "dwarf2/index-common.h"
37 #include "dwarf2/leb.h"
46 #include "gdb-demangle.h"
47 #include "filenames.h" /* for DOSish file names */
50 #include "complaints.h"
51 #include "dwarf2/expr.h"
52 #include "dwarf2/loc.h"
53 #include "cp-support.h"
59 #include "typeprint.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
70 #include "namespace.h"
71 #include "gdbsupport/function-view.h"
72 #include "gdbsupport/gdb_optional.h"
73 #include "gdbsupport/underlying.h"
74 #include "gdbsupport/hash_enum.h"
75 #include "filename-seen-cache.h"
79 #include <unordered_map>
80 #include "gdbsupport/selftest.h"
81 #include "rust-lang.h"
82 #include "gdbsupport/pathstuff.h"
84 /* When == 1, print basic high level tracing messages.
85 When > 1, be more verbose.
86 This is in contrast to the low level DIE reading of dwarf_die_debug. */
87 static unsigned int dwarf_read_debug
= 0;
89 /* When non-zero, dump DIEs after they are read in. */
90 static unsigned int dwarf_die_debug
= 0;
92 /* When non-zero, dump line number entries as they are read in. */
93 static unsigned int dwarf_line_debug
= 0;
95 /* When true, cross-check physname against demangler. */
96 static bool check_physname
= false;
98 /* When true, do not reject deprecated .gdb_index sections. */
99 static bool use_deprecated_index_sections
= false;
101 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
103 /* The "aclass" indices for various kinds of computed DWARF symbols. */
105 static int dwarf2_locexpr_index
;
106 static int dwarf2_loclist_index
;
107 static int dwarf2_locexpr_block_index
;
108 static int dwarf2_loclist_block_index
;
110 /* An index into a (C++) symbol name component in a symbol name as
111 recorded in the mapped_index's symbol table. For each C++ symbol
112 in the symbol table, we record one entry for the start of each
113 component in the symbol in a table of name components, and then
114 sort the table, in order to be able to binary search symbol names,
115 ignoring leading namespaces, both completion and regular look up.
116 For example, for symbol "A::B::C", we'll have an entry that points
117 to "A::B::C", another that points to "B::C", and another for "C".
118 Note that function symbols in GDB index have no parameter
119 information, just the function/method names. You can convert a
120 name_component to a "const char *" using the
121 'mapped_index::symbol_name_at(offset_type)' method. */
123 struct name_component
125 /* Offset in the symbol name where the component starts. Stored as
126 a (32-bit) offset instead of a pointer to save memory and improve
127 locality on 64-bit architectures. */
128 offset_type name_offset
;
130 /* The symbol's index in the symbol and constant pool tables of a
135 /* Base class containing bits shared by both .gdb_index and
136 .debug_name indexes. */
138 struct mapped_index_base
140 mapped_index_base () = default;
141 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
143 /* The name_component table (a sorted vector). See name_component's
144 description above. */
145 std::vector
<name_component
> name_components
;
147 /* How NAME_COMPONENTS is sorted. */
148 enum case_sensitivity name_components_casing
;
150 /* Return the number of names in the symbol table. */
151 virtual size_t symbol_name_count () const = 0;
153 /* Get the name of the symbol at IDX in the symbol table. */
154 virtual const char *symbol_name_at (offset_type idx
) const = 0;
156 /* Return whether the name at IDX in the symbol table should be
158 virtual bool symbol_name_slot_invalid (offset_type idx
) const
163 /* Build the symbol name component sorted vector, if we haven't
165 void build_name_components ();
167 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
168 possible matches for LN_NO_PARAMS in the name component
170 std::pair
<std::vector
<name_component
>::const_iterator
,
171 std::vector
<name_component
>::const_iterator
>
172 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
173 enum language lang
) const;
175 /* Prevent deleting/destroying via a base class pointer. */
177 ~mapped_index_base() = default;
180 /* A description of the mapped index. The file format is described in
181 a comment by the code that writes the index. */
182 struct mapped_index final
: public mapped_index_base
184 /* A slot/bucket in the symbol table hash. */
185 struct symbol_table_slot
187 const offset_type name
;
188 const offset_type vec
;
191 /* Index data format version. */
194 /* The address table data. */
195 gdb::array_view
<const gdb_byte
> address_table
;
197 /* The symbol table, implemented as a hash table. */
198 gdb::array_view
<symbol_table_slot
> symbol_table
;
200 /* A pointer to the constant pool. */
201 const char *constant_pool
= nullptr;
203 bool symbol_name_slot_invalid (offset_type idx
) const override
205 const auto &bucket
= this->symbol_table
[idx
];
206 return bucket
.name
== 0 && bucket
.vec
== 0;
209 /* Convenience method to get at the name of the symbol at IDX in the
211 const char *symbol_name_at (offset_type idx
) const override
212 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
214 size_t symbol_name_count () const override
215 { return this->symbol_table
.size (); }
218 /* A description of the mapped .debug_names.
219 Uninitialized map has CU_COUNT 0. */
220 struct mapped_debug_names final
: public mapped_index_base
222 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
223 : dwarf2_per_objfile (dwarf2_per_objfile_
)
226 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
227 bfd_endian dwarf5_byte_order
;
228 bool dwarf5_is_dwarf64
;
229 bool augmentation_is_gdb
;
231 uint32_t cu_count
= 0;
232 uint32_t tu_count
, bucket_count
, name_count
;
233 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
234 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
235 const gdb_byte
*name_table_string_offs_reordered
;
236 const gdb_byte
*name_table_entry_offs_reordered
;
237 const gdb_byte
*entry_pool
;
244 /* Attribute name DW_IDX_*. */
247 /* Attribute form DW_FORM_*. */
250 /* Value if FORM is DW_FORM_implicit_const. */
251 LONGEST implicit_const
;
253 std::vector
<attr
> attr_vec
;
256 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
258 const char *namei_to_name (uint32_t namei
) const;
260 /* Implementation of the mapped_index_base virtual interface, for
261 the name_components cache. */
263 const char *symbol_name_at (offset_type idx
) const override
264 { return namei_to_name (idx
); }
266 size_t symbol_name_count () const override
267 { return this->name_count
; }
270 /* See dwarf2read.h. */
273 get_dwarf2_per_objfile (struct objfile
*objfile
)
275 return dwarf2_objfile_data_key
.get (objfile
);
278 /* Default names of the debugging sections. */
280 /* Note that if the debugging section has been compressed, it might
281 have a name like .zdebug_info. */
283 static const struct dwarf2_debug_sections dwarf2_elf_names
=
285 { ".debug_info", ".zdebug_info" },
286 { ".debug_abbrev", ".zdebug_abbrev" },
287 { ".debug_line", ".zdebug_line" },
288 { ".debug_loc", ".zdebug_loc" },
289 { ".debug_loclists", ".zdebug_loclists" },
290 { ".debug_macinfo", ".zdebug_macinfo" },
291 { ".debug_macro", ".zdebug_macro" },
292 { ".debug_str", ".zdebug_str" },
293 { ".debug_str_offsets", ".zdebug_str_offsets" },
294 { ".debug_line_str", ".zdebug_line_str" },
295 { ".debug_ranges", ".zdebug_ranges" },
296 { ".debug_rnglists", ".zdebug_rnglists" },
297 { ".debug_types", ".zdebug_types" },
298 { ".debug_addr", ".zdebug_addr" },
299 { ".debug_frame", ".zdebug_frame" },
300 { ".eh_frame", NULL
},
301 { ".gdb_index", ".zgdb_index" },
302 { ".debug_names", ".zdebug_names" },
303 { ".debug_aranges", ".zdebug_aranges" },
307 /* List of DWO/DWP sections. */
309 static const struct dwop_section_names
311 struct dwarf2_section_names abbrev_dwo
;
312 struct dwarf2_section_names info_dwo
;
313 struct dwarf2_section_names line_dwo
;
314 struct dwarf2_section_names loc_dwo
;
315 struct dwarf2_section_names loclists_dwo
;
316 struct dwarf2_section_names macinfo_dwo
;
317 struct dwarf2_section_names macro_dwo
;
318 struct dwarf2_section_names str_dwo
;
319 struct dwarf2_section_names str_offsets_dwo
;
320 struct dwarf2_section_names types_dwo
;
321 struct dwarf2_section_names cu_index
;
322 struct dwarf2_section_names tu_index
;
326 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
327 { ".debug_info.dwo", ".zdebug_info.dwo" },
328 { ".debug_line.dwo", ".zdebug_line.dwo" },
329 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
330 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
331 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
332 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
333 { ".debug_str.dwo", ".zdebug_str.dwo" },
334 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
335 { ".debug_types.dwo", ".zdebug_types.dwo" },
336 { ".debug_cu_index", ".zdebug_cu_index" },
337 { ".debug_tu_index", ".zdebug_tu_index" },
340 /* local data types */
342 /* The data in a compilation unit header, after target2host
343 translation, looks like this. */
344 struct comp_unit_head
348 unsigned char addr_size
;
349 unsigned char signed_addr_p
;
350 sect_offset abbrev_sect_off
;
352 /* Size of file offsets; either 4 or 8. */
353 unsigned int offset_size
;
355 /* Size of the length field; either 4 or 12. */
356 unsigned int initial_length_size
;
358 enum dwarf_unit_type unit_type
;
360 /* Offset to the first byte of this compilation unit header in the
361 .debug_info section, for resolving relative reference dies. */
362 sect_offset sect_off
;
364 /* Offset to first die in this cu from the start of the cu.
365 This will be the first byte following the compilation unit header. */
366 cu_offset first_die_cu_offset
;
369 /* 64-bit signature of this unit. For type units, it denotes the signature of
370 the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5).
371 Also used in DWARF 5, to denote the dwo id when the unit type is
372 DW_UT_skeleton or DW_UT_split_compile. */
375 /* For types, offset in the type's DIE of the type defined by this TU. */
376 cu_offset type_cu_offset_in_tu
;
379 /* Type used for delaying computation of method physnames.
380 See comments for compute_delayed_physnames. */
381 struct delayed_method_info
383 /* The type to which the method is attached, i.e., its parent class. */
386 /* The index of the method in the type's function fieldlists. */
389 /* The index of the method in the fieldlist. */
392 /* The name of the DIE. */
395 /* The DIE associated with this method. */
396 struct die_info
*die
;
399 /* Internal state when decoding a particular compilation unit. */
402 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
405 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
407 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
408 Create the set of symtabs used by this TU, or if this TU is sharing
409 symtabs with another TU and the symtabs have already been created
410 then restore those symtabs in the line header.
411 We don't need the pc/line-number mapping for type units. */
412 void setup_type_unit_groups (struct die_info
*die
);
414 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
415 buildsym_compunit constructor. */
416 struct compunit_symtab
*start_symtab (const char *name
,
417 const char *comp_dir
,
420 /* Reset the builder. */
421 void reset_builder () { m_builder
.reset (); }
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
= 0;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
= language_unknown
;
434 const struct language_defn
*language_defn
= nullptr;
436 const char *producer
= nullptr;
439 /* The symtab builder for this CU. This is only non-NULL when full
440 symbols are being read. */
441 std::unique_ptr
<buildsym_compunit
> m_builder
;
444 /* The generic symbol table building routines have separate lists for
445 file scope symbols and all all other scopes (local scopes). So
446 we need to select the right one to pass to add_symbol_to_list().
447 We do it by keeping a pointer to the correct list in list_in_scope.
449 FIXME: The original dwarf code just treated the file scope as the
450 first local scope, and all other local scopes as nested local
451 scopes, and worked fine. Check to see if we really need to
452 distinguish these in buildsym.c. */
453 struct pending
**list_in_scope
= nullptr;
455 /* Hash table holding all the loaded partial DIEs
456 with partial_die->offset.SECT_OFF as hash. */
457 htab_t partial_dies
= nullptr;
459 /* Storage for things with the same lifetime as this read-in compilation
460 unit, including partial DIEs. */
461 auto_obstack comp_unit_obstack
;
463 /* When multiple dwarf2_cu structures are living in memory, this field
464 chains them all together, so that they can be released efficiently.
465 We will probably also want a generation counter so that most-recently-used
466 compilation units are cached... */
467 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
469 /* Backlink to our per_cu entry. */
470 struct dwarf2_per_cu_data
*per_cu
;
472 /* How many compilation units ago was this CU last referenced? */
475 /* A hash table of DIE cu_offset for following references with
476 die_info->offset.sect_off as hash. */
477 htab_t die_hash
= nullptr;
479 /* Full DIEs if read in. */
480 struct die_info
*dies
= nullptr;
482 /* A set of pointers to dwarf2_per_cu_data objects for compilation
483 units referenced by this one. Only set during full symbol processing;
484 partial symbol tables do not have dependencies. */
485 htab_t dependencies
= nullptr;
487 /* Header data from the line table, during full symbol processing. */
488 struct line_header
*line_header
= nullptr;
489 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
490 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
491 this is the DW_TAG_compile_unit die for this CU. We'll hold on
492 to the line header as long as this DIE is being processed. See
493 process_die_scope. */
494 die_info
*line_header_die_owner
= nullptr;
496 /* A list of methods which need to have physnames computed
497 after all type information has been read. */
498 std::vector
<delayed_method_info
> method_list
;
500 /* To be copied to symtab->call_site_htab. */
501 htab_t call_site_htab
= nullptr;
503 /* Non-NULL if this CU came from a DWO file.
504 There is an invariant here that is important to remember:
505 Except for attributes copied from the top level DIE in the "main"
506 (or "stub") file in preparation for reading the DWO file
507 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
508 Either there isn't a DWO file (in which case this is NULL and the point
509 is moot), or there is and either we're not going to read it (in which
510 case this is NULL) or there is and we are reading it (in which case this
512 struct dwo_unit
*dwo_unit
= nullptr;
514 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
515 Note this value comes from the Fission stub CU/TU's DIE. */
516 gdb::optional
<ULONGEST
> addr_base
;
518 /* The DW_AT_rnglists_base attribute if present.
519 Note this value comes from the Fission stub CU/TU's DIE.
520 Also note that the value is zero in the non-DWO case so this value can
521 be used without needing to know whether DWO files are in use or not.
522 N.B. This does not apply to DW_AT_ranges appearing in
523 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
524 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
525 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
526 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
527 ULONGEST ranges_base
= 0;
529 /* When reading debug info generated by older versions of rustc, we
530 have to rewrite some union types to be struct types with a
531 variant part. This rewriting must be done after the CU is fully
532 read in, because otherwise at the point of rewriting some struct
533 type might not have been fully processed. So, we keep a list of
534 all such types here and process them after expansion. */
535 std::vector
<struct type
*> rust_unions
;
537 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
538 files, the value is implicitly zero. For DWARF 5 version DWO files, the
539 value is often implicit and is the size of the header of
540 .debug_str_offsets section (8 or 4, depending on the address size). */
541 gdb::optional
<ULONGEST
> str_offsets_base
;
543 /* Mark used when releasing cached dies. */
546 /* This CU references .debug_loc. See the symtab->locations_valid field.
547 This test is imperfect as there may exist optimized debug code not using
548 any location list and still facing inlining issues if handled as
549 unoptimized code. For a future better test see GCC PR other/32998. */
550 bool has_loclist
: 1;
552 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
553 if all the producer_is_* fields are valid. This information is cached
554 because profiling CU expansion showed excessive time spent in
555 producer_is_gxx_lt_4_6. */
556 bool checked_producer
: 1;
557 bool producer_is_gxx_lt_4_6
: 1;
558 bool producer_is_gcc_lt_4_3
: 1;
559 bool producer_is_icc
: 1;
560 bool producer_is_icc_lt_14
: 1;
561 bool producer_is_codewarrior
: 1;
563 /* When true, the file that we're processing is known to have
564 debugging info for C++ namespaces. GCC 3.3.x did not produce
565 this information, but later versions do. */
567 bool processing_has_namespace_info
: 1;
569 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
571 /* If this CU was inherited by another CU (via specification,
572 abstract_origin, etc), this is the ancestor CU. */
575 /* Get the buildsym_compunit for this CU. */
576 buildsym_compunit
*get_builder ()
578 /* If this CU has a builder associated with it, use that. */
579 if (m_builder
!= nullptr)
580 return m_builder
.get ();
582 /* Otherwise, search ancestors for a valid builder. */
583 if (ancestor
!= nullptr)
584 return ancestor
->get_builder ();
590 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
591 This includes type_unit_group and quick_file_names. */
593 struct stmt_list_hash
595 /* The DWO unit this table is from or NULL if there is none. */
596 struct dwo_unit
*dwo_unit
;
598 /* Offset in .debug_line or .debug_line.dwo. */
599 sect_offset line_sect_off
;
602 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
603 an object of this type. */
605 struct type_unit_group
607 /* dwarf2read.c's main "handle" on a TU symtab.
608 To simplify things we create an artificial CU that "includes" all the
609 type units using this stmt_list so that the rest of the code still has
610 a "per_cu" handle on the symtab.
611 This PER_CU is recognized by having no section. */
612 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
613 struct dwarf2_per_cu_data per_cu
;
615 /* The TUs that share this DW_AT_stmt_list entry.
616 This is added to while parsing type units to build partial symtabs,
617 and is deleted afterwards and not used again. */
618 std::vector
<signatured_type
*> *tus
;
620 /* The compunit symtab.
621 Type units in a group needn't all be defined in the same source file,
622 so we create an essentially anonymous symtab as the compunit symtab. */
623 struct compunit_symtab
*compunit_symtab
;
625 /* The data used to construct the hash key. */
626 struct stmt_list_hash hash
;
628 /* The number of symtabs from the line header.
629 The value here must match line_header.num_file_names. */
630 unsigned int num_symtabs
;
632 /* The symbol tables for this TU (obtained from the files listed in
634 WARNING: The order of entries here must match the order of entries
635 in the line header. After the first TU using this type_unit_group, the
636 line header for the subsequent TUs is recreated from this. This is done
637 because we need to use the same symtabs for each TU using the same
638 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
639 there's no guarantee the line header doesn't have duplicate entries. */
640 struct symtab
**symtabs
;
643 /* These sections are what may appear in a (real or virtual) DWO file. */
647 struct dwarf2_section_info abbrev
;
648 struct dwarf2_section_info line
;
649 struct dwarf2_section_info loc
;
650 struct dwarf2_section_info loclists
;
651 struct dwarf2_section_info macinfo
;
652 struct dwarf2_section_info macro
;
653 struct dwarf2_section_info str
;
654 struct dwarf2_section_info str_offsets
;
655 /* In the case of a virtual DWO file, these two are unused. */
656 struct dwarf2_section_info info
;
657 std::vector
<dwarf2_section_info
> types
;
660 /* CUs/TUs in DWP/DWO files. */
664 /* Backlink to the containing struct dwo_file. */
665 struct dwo_file
*dwo_file
;
667 /* The "id" that distinguishes this CU/TU.
668 .debug_info calls this "dwo_id", .debug_types calls this "signature".
669 Since signatures came first, we stick with it for consistency. */
672 /* The section this CU/TU lives in, in the DWO file. */
673 struct dwarf2_section_info
*section
;
675 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
676 sect_offset sect_off
;
679 /* For types, offset in the type's DIE of the type defined by this TU. */
680 cu_offset type_offset_in_tu
;
683 /* include/dwarf2.h defines the DWP section codes.
684 It defines a max value but it doesn't define a min value, which we
685 use for error checking, so provide one. */
687 enum dwp_v2_section_ids
692 /* Data for one DWO file.
694 This includes virtual DWO files (a virtual DWO file is a DWO file as it
695 appears in a DWP file). DWP files don't really have DWO files per se -
696 comdat folding of types "loses" the DWO file they came from, and from
697 a high level view DWP files appear to contain a mass of random types.
698 However, to maintain consistency with the non-DWP case we pretend DWP
699 files contain virtual DWO files, and we assign each TU with one virtual
700 DWO file (generally based on the line and abbrev section offsets -
701 a heuristic that seems to work in practice). */
705 dwo_file () = default;
706 DISABLE_COPY_AND_ASSIGN (dwo_file
);
708 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
709 For virtual DWO files the name is constructed from the section offsets
710 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
711 from related CU+TUs. */
712 const char *dwo_name
= nullptr;
714 /* The DW_AT_comp_dir attribute. */
715 const char *comp_dir
= nullptr;
717 /* The bfd, when the file is open. Otherwise this is NULL.
718 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
719 gdb_bfd_ref_ptr dbfd
;
721 /* The sections that make up this DWO file.
722 Remember that for virtual DWO files in DWP V2, these are virtual
723 sections (for lack of a better name). */
724 struct dwo_sections sections
{};
726 /* The CUs in the file.
727 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
728 an extension to handle LLVM's Link Time Optimization output (where
729 multiple source files may be compiled into a single object/dwo pair). */
732 /* Table of TUs in the file.
733 Each element is a struct dwo_unit. */
737 /* These sections are what may appear in a DWP file. */
741 /* These are used by both DWP version 1 and 2. */
742 struct dwarf2_section_info str
;
743 struct dwarf2_section_info cu_index
;
744 struct dwarf2_section_info tu_index
;
746 /* These are only used by DWP version 2 files.
747 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
748 sections are referenced by section number, and are not recorded here.
749 In DWP version 2 there is at most one copy of all these sections, each
750 section being (effectively) comprised of the concatenation of all of the
751 individual sections that exist in the version 1 format.
752 To keep the code simple we treat each of these concatenated pieces as a
753 section itself (a virtual section?). */
754 struct dwarf2_section_info abbrev
;
755 struct dwarf2_section_info info
;
756 struct dwarf2_section_info line
;
757 struct dwarf2_section_info loc
;
758 struct dwarf2_section_info macinfo
;
759 struct dwarf2_section_info macro
;
760 struct dwarf2_section_info str_offsets
;
761 struct dwarf2_section_info types
;
764 /* These sections are what may appear in a virtual DWO file in DWP version 1.
765 A virtual DWO file is a DWO file as it appears in a DWP file. */
767 struct virtual_v1_dwo_sections
769 struct dwarf2_section_info abbrev
;
770 struct dwarf2_section_info line
;
771 struct dwarf2_section_info loc
;
772 struct dwarf2_section_info macinfo
;
773 struct dwarf2_section_info macro
;
774 struct dwarf2_section_info str_offsets
;
775 /* Each DWP hash table entry records one CU or one TU.
776 That is recorded here, and copied to dwo_unit.section. */
777 struct dwarf2_section_info info_or_types
;
780 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
781 In version 2, the sections of the DWO files are concatenated together
782 and stored in one section of that name. Thus each ELF section contains
783 several "virtual" sections. */
785 struct virtual_v2_dwo_sections
787 bfd_size_type abbrev_offset
;
788 bfd_size_type abbrev_size
;
790 bfd_size_type line_offset
;
791 bfd_size_type line_size
;
793 bfd_size_type loc_offset
;
794 bfd_size_type loc_size
;
796 bfd_size_type macinfo_offset
;
797 bfd_size_type macinfo_size
;
799 bfd_size_type macro_offset
;
800 bfd_size_type macro_size
;
802 bfd_size_type str_offsets_offset
;
803 bfd_size_type str_offsets_size
;
805 /* Each DWP hash table entry records one CU or one TU.
806 That is recorded here, and copied to dwo_unit.section. */
807 bfd_size_type info_or_types_offset
;
808 bfd_size_type info_or_types_size
;
811 /* Contents of DWP hash tables. */
813 struct dwp_hash_table
815 uint32_t version
, nr_columns
;
816 uint32_t nr_units
, nr_slots
;
817 const gdb_byte
*hash_table
, *unit_table
;
822 const gdb_byte
*indices
;
826 /* This is indexed by column number and gives the id of the section
828 #define MAX_NR_V2_DWO_SECTIONS \
829 (1 /* .debug_info or .debug_types */ \
830 + 1 /* .debug_abbrev */ \
831 + 1 /* .debug_line */ \
832 + 1 /* .debug_loc */ \
833 + 1 /* .debug_str_offsets */ \
834 + 1 /* .debug_macro or .debug_macinfo */)
835 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
836 const gdb_byte
*offsets
;
837 const gdb_byte
*sizes
;
842 /* Data for one DWP file. */
846 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
848 dbfd (std::move (abfd
))
852 /* Name of the file. */
855 /* File format version. */
859 gdb_bfd_ref_ptr dbfd
;
861 /* Section info for this file. */
862 struct dwp_sections sections
{};
864 /* Table of CUs in the file. */
865 const struct dwp_hash_table
*cus
= nullptr;
867 /* Table of TUs in the file. */
868 const struct dwp_hash_table
*tus
= nullptr;
870 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
871 htab_t loaded_cus
{};
872 htab_t loaded_tus
{};
874 /* Table to map ELF section numbers to their sections.
875 This is only needed for the DWP V1 file format. */
876 unsigned int num_sections
= 0;
877 asection
**elf_sections
= nullptr;
880 /* Struct used to pass misc. parameters to read_die_and_children, et
881 al. which are used for both .debug_info and .debug_types dies.
882 All parameters here are unchanging for the life of the call. This
883 struct exists to abstract away the constant parameters of die reading. */
885 struct die_reader_specs
887 /* The bfd of die_section. */
890 /* The CU of the DIE we are parsing. */
891 struct dwarf2_cu
*cu
;
893 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
894 struct dwo_file
*dwo_file
;
896 /* The section the die comes from.
897 This is either .debug_info or .debug_types, or the .dwo variants. */
898 struct dwarf2_section_info
*die_section
;
900 /* die_section->buffer. */
901 const gdb_byte
*buffer
;
903 /* The end of the buffer. */
904 const gdb_byte
*buffer_end
;
906 /* The abbreviation table to use when reading the DIEs. */
907 struct abbrev_table
*abbrev_table
;
910 /* A subclass of die_reader_specs that holds storage and has complex
911 constructor and destructor behavior. */
913 class cutu_reader
: public die_reader_specs
917 cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
918 struct abbrev_table
*abbrev_table
,
919 int use_existing_cu
, int keep
,
922 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
923 struct dwarf2_cu
*parent_cu
= nullptr,
924 struct dwo_file
*dwo_file
= nullptr);
928 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
930 const gdb_byte
*info_ptr
= nullptr;
931 struct die_info
*comp_unit_die
= nullptr;
932 bool dummy_p
= false;
935 void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
936 int use_existing_cu
, int keep
);
938 struct dwarf2_per_cu_data
*m_this_cu
;
940 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
942 /* The ordinary abbreviation table. */
943 abbrev_table_up m_abbrev_table_holder
;
945 /* The DWO abbreviation table. */
946 abbrev_table_up m_dwo_abbrev_table
;
949 /* dir_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5 and
951 typedef int dir_index
;
953 /* file_name_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5
955 typedef int file_name_index
;
959 file_entry () = default;
961 file_entry (const char *name_
, dir_index d_index_
,
962 unsigned int mod_time_
, unsigned int length_
)
965 mod_time (mod_time_
),
969 /* Return the include directory at D_INDEX stored in LH. Returns
970 NULL if D_INDEX is out of bounds. */
971 const char *include_dir (const line_header
*lh
) const;
973 /* The file name. Note this is an observing pointer. The memory is
974 owned by debug_line_buffer. */
977 /* The directory index (1-based). */
978 dir_index d_index
{};
980 unsigned int mod_time
{};
982 unsigned int length
{};
984 /* True if referenced by the Line Number Program. */
987 /* The associated symbol table, if any. */
988 struct symtab
*symtab
{};
991 /* The line number information for a compilation unit (found in the
992 .debug_line section) begins with a "statement program header",
993 which contains the following information. */
1000 /* Add an entry to the include directory table. */
1001 void add_include_dir (const char *include_dir
);
1003 /* Add an entry to the file name table. */
1004 void add_file_name (const char *name
, dir_index d_index
,
1005 unsigned int mod_time
, unsigned int length
);
1007 /* Return the include dir at INDEX (0-based in DWARF 5 and 1-based before).
1008 Returns NULL if INDEX is out of bounds. */
1009 const char *include_dir_at (dir_index index
) const
1015 vec_index
= index
- 1;
1016 if (vec_index
< 0 || vec_index
>= m_include_dirs
.size ())
1018 return m_include_dirs
[vec_index
];
1021 bool is_valid_file_index (int file_index
)
1024 return 0 <= file_index
&& file_index
< file_names_size ();
1025 return 1 <= file_index
&& file_index
<= file_names_size ();
1028 /* Return the file name at INDEX (0-based in DWARF 5 and 1-based before).
1029 Returns NULL if INDEX is out of bounds. */
1030 file_entry
*file_name_at (file_name_index index
)
1036 vec_index
= index
- 1;
1037 if (vec_index
< 0 || vec_index
>= m_file_names
.size ())
1039 return &m_file_names
[vec_index
];
1042 /* The indexes are 0-based in DWARF 5 and 1-based in DWARF 4. Therefore,
1043 this method should only be used to iterate through all file entries in an
1044 index-agnostic manner. */
1045 std::vector
<file_entry
> &file_names ()
1046 { return m_file_names
; }
1048 /* Offset of line number information in .debug_line section. */
1049 sect_offset sect_off
{};
1051 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1052 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1054 unsigned int total_length
{};
1055 unsigned short version
{};
1056 unsigned int header_length
{};
1057 unsigned char minimum_instruction_length
{};
1058 unsigned char maximum_ops_per_instruction
{};
1059 unsigned char default_is_stmt
{};
1061 unsigned char line_range
{};
1062 unsigned char opcode_base
{};
1064 /* standard_opcode_lengths[i] is the number of operands for the
1065 standard opcode whose value is i. This means that
1066 standard_opcode_lengths[0] is unused, and the last meaningful
1067 element is standard_opcode_lengths[opcode_base - 1]. */
1068 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1070 int file_names_size ()
1071 { return m_file_names
.size(); }
1073 /* The start and end of the statement program following this
1074 header. These point into dwarf2_per_objfile->line_buffer. */
1075 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1078 /* The include_directories table. Note these are observing
1079 pointers. The memory is owned by debug_line_buffer. */
1080 std::vector
<const char *> m_include_dirs
;
1082 /* The file_names table. This is private because the meaning of indexes
1083 differs among DWARF versions (The first valid index is 1 in DWARF 4 and
1084 before, and is 0 in DWARF 5 and later). So the client should use
1085 file_name_at method for access. */
1086 std::vector
<file_entry
> m_file_names
;
1089 typedef std::unique_ptr
<line_header
> line_header_up
;
1092 file_entry::include_dir (const line_header
*lh
) const
1094 return lh
->include_dir_at (d_index
);
1097 /* When we construct a partial symbol table entry we only
1098 need this much information. */
1099 struct partial_die_info
: public allocate_on_obstack
1101 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1103 /* Disable assign but still keep copy ctor, which is needed
1104 load_partial_dies. */
1105 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1107 /* Adjust the partial die before generating a symbol for it. This
1108 function may set the is_external flag or change the DIE's
1110 void fixup (struct dwarf2_cu
*cu
);
1112 /* Read a minimal amount of information into the minimal die
1114 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1115 const struct abbrev_info
&abbrev
,
1116 const gdb_byte
*info_ptr
);
1118 /* Offset of this DIE. */
1119 const sect_offset sect_off
;
1121 /* DWARF-2 tag for this DIE. */
1122 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1124 /* Assorted flags describing the data found in this DIE. */
1125 const unsigned int has_children
: 1;
1127 unsigned int is_external
: 1;
1128 unsigned int is_declaration
: 1;
1129 unsigned int has_type
: 1;
1130 unsigned int has_specification
: 1;
1131 unsigned int has_pc_info
: 1;
1132 unsigned int may_be_inlined
: 1;
1134 /* This DIE has been marked DW_AT_main_subprogram. */
1135 unsigned int main_subprogram
: 1;
1137 /* Flag set if the SCOPE field of this structure has been
1139 unsigned int scope_set
: 1;
1141 /* Flag set if the DIE has a byte_size attribute. */
1142 unsigned int has_byte_size
: 1;
1144 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1145 unsigned int has_const_value
: 1;
1147 /* Flag set if any of the DIE's children are template arguments. */
1148 unsigned int has_template_arguments
: 1;
1150 /* Flag set if fixup has been called on this die. */
1151 unsigned int fixup_called
: 1;
1153 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1154 unsigned int is_dwz
: 1;
1156 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1157 unsigned int spec_is_dwz
: 1;
1159 /* The name of this DIE. Normally the value of DW_AT_name, but
1160 sometimes a default name for unnamed DIEs. */
1161 const char *name
= nullptr;
1163 /* The linkage name, if present. */
1164 const char *linkage_name
= nullptr;
1166 /* The scope to prepend to our children. This is generally
1167 allocated on the comp_unit_obstack, so will disappear
1168 when this compilation unit leaves the cache. */
1169 const char *scope
= nullptr;
1171 /* Some data associated with the partial DIE. The tag determines
1172 which field is live. */
1175 /* The location description associated with this DIE, if any. */
1176 struct dwarf_block
*locdesc
;
1177 /* The offset of an import, for DW_TAG_imported_unit. */
1178 sect_offset sect_off
;
1181 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1182 CORE_ADDR lowpc
= 0;
1183 CORE_ADDR highpc
= 0;
1185 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1186 DW_AT_sibling, if any. */
1187 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1188 could return DW_AT_sibling values to its caller load_partial_dies. */
1189 const gdb_byte
*sibling
= nullptr;
1191 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1192 DW_AT_specification (or DW_AT_abstract_origin or
1193 DW_AT_extension). */
1194 sect_offset spec_offset
{};
1196 /* Pointers to this DIE's parent, first child, and next sibling,
1198 struct partial_die_info
*die_parent
= nullptr;
1199 struct partial_die_info
*die_child
= nullptr;
1200 struct partial_die_info
*die_sibling
= nullptr;
1202 friend struct partial_die_info
*
1203 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1206 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1207 partial_die_info (sect_offset sect_off
)
1208 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1212 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1214 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1219 has_specification
= 0;
1222 main_subprogram
= 0;
1225 has_const_value
= 0;
1226 has_template_arguments
= 0;
1233 /* This data structure holds a complete die structure. */
1236 /* DWARF-2 tag for this DIE. */
1237 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1239 /* Number of attributes */
1240 unsigned char num_attrs
;
1242 /* True if we're presently building the full type name for the
1243 type derived from this DIE. */
1244 unsigned char building_fullname
: 1;
1246 /* True if this die is in process. PR 16581. */
1247 unsigned char in_process
: 1;
1249 /* True if this DIE has children. */
1250 unsigned char has_children
: 1;
1253 unsigned int abbrev
;
1255 /* Offset in .debug_info or .debug_types section. */
1256 sect_offset sect_off
;
1258 /* The dies in a compilation unit form an n-ary tree. PARENT
1259 points to this die's parent; CHILD points to the first child of
1260 this node; and all the children of a given node are chained
1261 together via their SIBLING fields. */
1262 struct die_info
*child
; /* Its first child, if any. */
1263 struct die_info
*sibling
; /* Its next sibling, if any. */
1264 struct die_info
*parent
; /* Its parent, if any. */
1266 /* An array of attributes, with NUM_ATTRS elements. There may be
1267 zero, but it's not common and zero-sized arrays are not
1268 sufficiently portable C. */
1269 struct attribute attrs
[1];
1272 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1273 but this would require a corresponding change in unpack_field_as_long
1275 static int bits_per_byte
= 8;
1277 /* When reading a variant or variant part, we track a bit more
1278 information about the field, and store it in an object of this
1281 struct variant_field
1283 /* If we see a DW_TAG_variant, then this will be the discriminant
1285 ULONGEST discriminant_value
;
1286 /* If we see a DW_TAG_variant, then this will be set if this is the
1288 bool default_branch
;
1289 /* While reading a DW_TAG_variant_part, this will be set if this
1290 field is the discriminant. */
1291 bool is_discriminant
;
1296 int accessibility
= 0;
1298 /* Extra information to describe a variant or variant part. */
1299 struct variant_field variant
{};
1300 struct field field
{};
1305 const char *name
= nullptr;
1306 std::vector
<struct fn_field
> fnfields
;
1309 /* The routines that read and process dies for a C struct or C++ class
1310 pass lists of data member fields and lists of member function fields
1311 in an instance of a field_info structure, as defined below. */
1314 /* List of data member and baseclasses fields. */
1315 std::vector
<struct nextfield
> fields
;
1316 std::vector
<struct nextfield
> baseclasses
;
1318 /* Number of fields (including baseclasses). */
1321 /* Set if the accessibility of one of the fields is not public. */
1322 int non_public_fields
= 0;
1324 /* Member function fieldlist array, contains name of possibly overloaded
1325 member function, number of overloaded member functions and a pointer
1326 to the head of the member function field chain. */
1327 std::vector
<struct fnfieldlist
> fnfieldlists
;
1329 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1330 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1331 std::vector
<struct decl_field
> typedef_field_list
;
1333 /* Nested types defined by this class and the number of elements in this
1335 std::vector
<struct decl_field
> nested_types_list
;
1338 /* Loaded secondary compilation units are kept in memory until they
1339 have not been referenced for the processing of this many
1340 compilation units. Set this to zero to disable caching. Cache
1341 sizes of up to at least twenty will improve startup time for
1342 typical inter-CU-reference binaries, at an obvious memory cost. */
1343 static int dwarf_max_cache_age
= 5;
1345 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1346 struct cmd_list_element
*c
, const char *value
)
1348 fprintf_filtered (file
, _("The upper bound on the age of cached "
1349 "DWARF compilation units is %s.\n"),
1353 /* local function prototypes */
1355 static void dwarf2_find_base_address (struct die_info
*die
,
1356 struct dwarf2_cu
*cu
);
1358 static dwarf2_psymtab
*create_partial_symtab
1359 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1361 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1362 const gdb_byte
*info_ptr
,
1363 struct die_info
*type_unit_die
);
1365 static void dwarf2_build_psymtabs_hard
1366 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1368 static void scan_partial_symbols (struct partial_die_info
*,
1369 CORE_ADDR
*, CORE_ADDR
*,
1370 int, struct dwarf2_cu
*);
1372 static void add_partial_symbol (struct partial_die_info
*,
1373 struct dwarf2_cu
*);
1375 static void add_partial_namespace (struct partial_die_info
*pdi
,
1376 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1377 int set_addrmap
, struct dwarf2_cu
*cu
);
1379 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1380 CORE_ADDR
*highpc
, int set_addrmap
,
1381 struct dwarf2_cu
*cu
);
1383 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1384 struct dwarf2_cu
*cu
);
1386 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1387 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1388 int need_pc
, struct dwarf2_cu
*cu
);
1390 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1392 static struct partial_die_info
*load_partial_dies
1393 (const struct die_reader_specs
*, const gdb_byte
*, int);
1395 /* A pair of partial_die_info and compilation unit. */
1396 struct cu_partial_die_info
1398 /* The compilation unit of the partial_die_info. */
1399 struct dwarf2_cu
*cu
;
1400 /* A partial_die_info. */
1401 struct partial_die_info
*pdi
;
1403 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1409 cu_partial_die_info () = delete;
1412 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1413 struct dwarf2_cu
*);
1415 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1416 struct attribute
*, struct attr_abbrev
*,
1417 const gdb_byte
*, bool *need_reprocess
);
1419 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1420 struct attribute
*attr
);
1422 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1424 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1427 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1429 static LONGEST read_checked_initial_length_and_offset
1430 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1431 unsigned int *, unsigned int *);
1433 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1434 const struct comp_unit_head
*,
1437 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1439 static sect_offset read_abbrev_offset
1440 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1441 struct dwarf2_section_info
*, sect_offset
);
1443 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1445 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1447 static const char *read_indirect_string
1448 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1449 const struct comp_unit_head
*, unsigned int *);
1451 static const char *read_indirect_line_string
1452 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1453 const struct comp_unit_head
*, unsigned int *);
1455 static const char *read_indirect_string_at_offset
1456 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1457 LONGEST str_offset
);
1459 static const char *read_indirect_string_from_dwz
1460 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1462 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1466 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1467 ULONGEST str_index
);
1469 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1470 ULONGEST str_index
);
1472 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1474 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1475 struct dwarf2_cu
*);
1477 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1480 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1481 struct dwarf2_cu
*cu
);
1483 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1485 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1486 struct dwarf2_cu
*cu
);
1488 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1490 static struct die_info
*die_specification (struct die_info
*die
,
1491 struct dwarf2_cu
**);
1493 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1494 struct dwarf2_cu
*cu
);
1496 static void dwarf_decode_lines (struct line_header
*, const char *,
1497 struct dwarf2_cu
*, dwarf2_psymtab
*,
1498 CORE_ADDR
, int decode_mapping
);
1500 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1503 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1504 struct dwarf2_cu
*, struct symbol
* = NULL
);
1506 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1507 struct dwarf2_cu
*);
1509 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1512 struct obstack
*obstack
,
1513 struct dwarf2_cu
*cu
, LONGEST
*value
,
1514 const gdb_byte
**bytes
,
1515 struct dwarf2_locexpr_baton
**baton
);
1517 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1519 static int need_gnat_info (struct dwarf2_cu
*);
1521 static struct type
*die_descriptive_type (struct die_info
*,
1522 struct dwarf2_cu
*);
1524 static void set_descriptive_type (struct type
*, struct die_info
*,
1525 struct dwarf2_cu
*);
1527 static struct type
*die_containing_type (struct die_info
*,
1528 struct dwarf2_cu
*);
1530 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1531 struct dwarf2_cu
*);
1533 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1535 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1537 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1539 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1540 const char *suffix
, int physname
,
1541 struct dwarf2_cu
*cu
);
1543 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1545 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1547 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1549 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1551 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1553 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1555 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1556 struct dwarf2_cu
*, dwarf2_psymtab
*);
1558 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1559 values. Keep the items ordered with increasing constraints compliance. */
1562 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1563 PC_BOUNDS_NOT_PRESENT
,
1565 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1566 were present but they do not form a valid range of PC addresses. */
1569 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1572 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1576 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1577 CORE_ADDR
*, CORE_ADDR
*,
1581 static void get_scope_pc_bounds (struct die_info
*,
1582 CORE_ADDR
*, CORE_ADDR
*,
1583 struct dwarf2_cu
*);
1585 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1586 CORE_ADDR
, struct dwarf2_cu
*);
1588 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1589 struct dwarf2_cu
*);
1591 static void dwarf2_attach_fields_to_type (struct field_info
*,
1592 struct type
*, struct dwarf2_cu
*);
1594 static void dwarf2_add_member_fn (struct field_info
*,
1595 struct die_info
*, struct type
*,
1596 struct dwarf2_cu
*);
1598 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1600 struct dwarf2_cu
*);
1602 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1604 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1606 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1608 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1610 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1612 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1614 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1616 static struct type
*read_module_type (struct die_info
*die
,
1617 struct dwarf2_cu
*cu
);
1619 static const char *namespace_name (struct die_info
*die
,
1620 int *is_anonymous
, struct dwarf2_cu
*);
1622 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1624 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1626 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1627 struct dwarf2_cu
*);
1629 static struct die_info
*read_die_and_siblings_1
1630 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1633 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1634 const gdb_byte
*info_ptr
,
1635 const gdb_byte
**new_info_ptr
,
1636 struct die_info
*parent
);
1638 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1639 struct die_info
**, const gdb_byte
*,
1642 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1643 struct die_info
**, const gdb_byte
*);
1645 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1647 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1650 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1652 static const char *dwarf2_full_name (const char *name
,
1653 struct die_info
*die
,
1654 struct dwarf2_cu
*cu
);
1656 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1657 struct dwarf2_cu
*cu
);
1659 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1660 struct dwarf2_cu
**);
1662 static const char *dwarf_tag_name (unsigned int);
1664 static const char *dwarf_attr_name (unsigned int);
1666 static const char *dwarf_unit_type_name (int unit_type
);
1668 static const char *dwarf_form_name (unsigned int);
1670 static const char *dwarf_bool_name (unsigned int);
1672 static const char *dwarf_type_encoding_name (unsigned int);
1674 static struct die_info
*sibling_die (struct die_info
*);
1676 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1678 static void dump_die_for_error (struct die_info
*);
1680 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1683 /*static*/ void dump_die (struct die_info
*, int max_level
);
1685 static void store_in_ref_table (struct die_info
*,
1686 struct dwarf2_cu
*);
1688 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1690 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1692 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1693 const struct attribute
*,
1694 struct dwarf2_cu
**);
1696 static struct die_info
*follow_die_ref (struct die_info
*,
1697 const struct attribute
*,
1698 struct dwarf2_cu
**);
1700 static struct die_info
*follow_die_sig (struct die_info
*,
1701 const struct attribute
*,
1702 struct dwarf2_cu
**);
1704 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1705 struct dwarf2_cu
*);
1707 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1708 const struct attribute
*,
1709 struct dwarf2_cu
*);
1711 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1713 static void read_signatured_type (struct signatured_type
*);
1715 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1716 struct die_info
*die
, struct dwarf2_cu
*cu
,
1717 struct dynamic_prop
*prop
, struct type
*type
);
1719 /* memory allocation interface */
1721 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1723 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1725 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1727 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1728 struct dwarf2_loclist_baton
*baton
,
1729 const struct attribute
*attr
);
1731 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1733 struct dwarf2_cu
*cu
,
1736 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1737 const gdb_byte
*info_ptr
,
1738 struct abbrev_info
*abbrev
);
1740 static hashval_t
partial_die_hash (const void *item
);
1742 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1744 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1745 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1746 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1748 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1749 struct die_info
*comp_unit_die
,
1750 enum language pretend_language
);
1752 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1754 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1756 static struct type
*set_die_type (struct die_info
*, struct type
*,
1757 struct dwarf2_cu
*);
1759 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1761 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1763 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1766 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1769 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1772 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1773 struct dwarf2_per_cu_data
*);
1775 static void dwarf2_mark (struct dwarf2_cu
*);
1777 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1779 static struct type
*get_die_type_at_offset (sect_offset
,
1780 struct dwarf2_per_cu_data
*);
1782 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1784 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1785 enum language pretend_language
);
1787 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1789 static struct type
*dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
);
1790 static struct type
*dwarf2_per_cu_addr_sized_int_type
1791 (struct dwarf2_per_cu_data
*per_cu
, bool unsigned_p
);
1792 static struct type
*dwarf2_per_cu_int_type
1793 (struct dwarf2_per_cu_data
*per_cu
, int size_in_bytes
,
1796 /* Class, the destructor of which frees all allocated queue entries. This
1797 will only have work to do if an error was thrown while processing the
1798 dwarf. If no error was thrown then the queue entries should have all
1799 been processed, and freed, as we went along. */
1801 class dwarf2_queue_guard
1804 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1805 : m_per_objfile (per_objfile
)
1809 /* Free any entries remaining on the queue. There should only be
1810 entries left if we hit an error while processing the dwarf. */
1811 ~dwarf2_queue_guard ()
1813 /* Ensure that no memory is allocated by the queue. */
1814 std::queue
<dwarf2_queue_item
> empty
;
1815 std::swap (m_per_objfile
->queue
, empty
);
1818 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1821 dwarf2_per_objfile
*m_per_objfile
;
1824 dwarf2_queue_item::~dwarf2_queue_item ()
1826 /* Anything still marked queued is likely to be in an
1827 inconsistent state, so discard it. */
1830 if (per_cu
->cu
!= NULL
)
1831 free_one_cached_comp_unit (per_cu
);
1836 /* The return type of find_file_and_directory. Note, the enclosed
1837 string pointers are only valid while this object is valid. */
1839 struct file_and_directory
1841 /* The filename. This is never NULL. */
1844 /* The compilation directory. NULL if not known. If we needed to
1845 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1846 points directly to the DW_AT_comp_dir string attribute owned by
1847 the obstack that owns the DIE. */
1848 const char *comp_dir
;
1850 /* If we needed to build a new string for comp_dir, this is what
1851 owns the storage. */
1852 std::string comp_dir_storage
;
1855 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1856 struct dwarf2_cu
*cu
);
1858 static char *file_full_name (int file
, struct line_header
*lh
,
1859 const char *comp_dir
);
1861 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1862 enum class rcuh_kind
{ COMPILE
, TYPE
};
1864 static const gdb_byte
*read_and_check_comp_unit_head
1865 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1866 struct comp_unit_head
*header
,
1867 struct dwarf2_section_info
*section
,
1868 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1869 rcuh_kind section_kind
);
1871 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1873 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1875 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1876 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1877 struct dwp_file
*dwp_file
, const char *comp_dir
,
1878 ULONGEST signature
, int is_debug_types
);
1880 static struct dwp_file
*get_dwp_file
1881 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1883 static struct dwo_unit
*lookup_dwo_comp_unit
1884 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1886 static struct dwo_unit
*lookup_dwo_type_unit
1887 (struct signatured_type
*, const char *, const char *);
1889 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1891 /* A unique pointer to a dwo_file. */
1893 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1895 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1897 static void check_producer (struct dwarf2_cu
*cu
);
1899 static void free_line_header_voidp (void *arg
);
1901 /* Various complaints about symbol reading that don't abort the process. */
1904 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1906 complaint (_("statement list doesn't fit in .debug_line section"));
1910 dwarf2_debug_line_missing_file_complaint (void)
1912 complaint (_(".debug_line section has line data without a file"));
1916 dwarf2_debug_line_missing_end_sequence_complaint (void)
1918 complaint (_(".debug_line section has line "
1919 "program sequence without an end"));
1923 dwarf2_complex_location_expr_complaint (void)
1925 complaint (_("location expression too complex"));
1929 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1932 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1937 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1939 complaint (_("debug info runs off end of %s section"
1941 section
->get_name (),
1942 section
->get_file_name ());
1946 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1948 complaint (_("macro debug info contains a "
1949 "malformed macro definition:\n`%s'"),
1954 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1956 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1960 /* Hash function for line_header_hash. */
1963 line_header_hash (const struct line_header
*ofs
)
1965 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1968 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1971 line_header_hash_voidp (const void *item
)
1973 const struct line_header
*ofs
= (const struct line_header
*) item
;
1975 return line_header_hash (ofs
);
1978 /* Equality function for line_header_hash. */
1981 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1983 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1984 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1986 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1987 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1992 /* See declaration. */
1994 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1995 const dwarf2_debug_sections
*names
,
1997 : objfile (objfile_
),
1998 can_copy (can_copy_
)
2001 names
= &dwarf2_elf_names
;
2003 bfd
*obfd
= objfile
->obfd
;
2005 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2006 locate_sections (obfd
, sec
, *names
);
2009 dwarf2_per_objfile::~dwarf2_per_objfile ()
2011 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2012 free_cached_comp_units ();
2014 if (quick_file_names_table
)
2015 htab_delete (quick_file_names_table
);
2017 if (line_header_hash
)
2018 htab_delete (line_header_hash
);
2020 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2021 per_cu
->imported_symtabs_free ();
2023 for (signatured_type
*sig_type
: all_type_units
)
2024 sig_type
->per_cu
.imported_symtabs_free ();
2026 /* Everything else should be on the objfile obstack. */
2029 /* See declaration. */
2032 dwarf2_per_objfile::free_cached_comp_units ()
2034 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2035 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2036 while (per_cu
!= NULL
)
2038 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2041 *last_chain
= next_cu
;
2046 /* A helper class that calls free_cached_comp_units on
2049 class free_cached_comp_units
2053 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2054 : m_per_objfile (per_objfile
)
2058 ~free_cached_comp_units ()
2060 m_per_objfile
->free_cached_comp_units ();
2063 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2067 dwarf2_per_objfile
*m_per_objfile
;
2070 /* Try to locate the sections we need for DWARF 2 debugging
2071 information and return true if we have enough to do something.
2072 NAMES points to the dwarf2 section names, or is NULL if the standard
2073 ELF names are used. CAN_COPY is true for formats where symbol
2074 interposition is possible and so symbol values must follow copy
2075 relocation rules. */
2078 dwarf2_has_info (struct objfile
*objfile
,
2079 const struct dwarf2_debug_sections
*names
,
2082 if (objfile
->flags
& OBJF_READNEVER
)
2085 struct dwarf2_per_objfile
*dwarf2_per_objfile
2086 = get_dwarf2_per_objfile (objfile
);
2088 if (dwarf2_per_objfile
== NULL
)
2089 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2093 return (!dwarf2_per_objfile
->info
.is_virtual
2094 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2095 && !dwarf2_per_objfile
->abbrev
.is_virtual
2096 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2099 /* When loading sections, we look either for uncompressed section or for
2100 compressed section names. */
2103 section_is_p (const char *section_name
,
2104 const struct dwarf2_section_names
*names
)
2106 if (names
->normal
!= NULL
2107 && strcmp (section_name
, names
->normal
) == 0)
2109 if (names
->compressed
!= NULL
2110 && strcmp (section_name
, names
->compressed
) == 0)
2115 /* See declaration. */
2118 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2119 const dwarf2_debug_sections
&names
)
2121 flagword aflag
= bfd_section_flags (sectp
);
2123 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2126 else if (elf_section_data (sectp
)->this_hdr
.sh_size
2127 > bfd_get_file_size (abfd
))
2129 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
2130 warning (_("Discarding section %s which has a section size (%s"
2131 ") larger than the file size [in module %s]"),
2132 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
2133 bfd_get_filename (abfd
));
2135 else if (section_is_p (sectp
->name
, &names
.info
))
2137 this->info
.s
.section
= sectp
;
2138 this->info
.size
= bfd_section_size (sectp
);
2140 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2142 this->abbrev
.s
.section
= sectp
;
2143 this->abbrev
.size
= bfd_section_size (sectp
);
2145 else if (section_is_p (sectp
->name
, &names
.line
))
2147 this->line
.s
.section
= sectp
;
2148 this->line
.size
= bfd_section_size (sectp
);
2150 else if (section_is_p (sectp
->name
, &names
.loc
))
2152 this->loc
.s
.section
= sectp
;
2153 this->loc
.size
= bfd_section_size (sectp
);
2155 else if (section_is_p (sectp
->name
, &names
.loclists
))
2157 this->loclists
.s
.section
= sectp
;
2158 this->loclists
.size
= bfd_section_size (sectp
);
2160 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2162 this->macinfo
.s
.section
= sectp
;
2163 this->macinfo
.size
= bfd_section_size (sectp
);
2165 else if (section_is_p (sectp
->name
, &names
.macro
))
2167 this->macro
.s
.section
= sectp
;
2168 this->macro
.size
= bfd_section_size (sectp
);
2170 else if (section_is_p (sectp
->name
, &names
.str
))
2172 this->str
.s
.section
= sectp
;
2173 this->str
.size
= bfd_section_size (sectp
);
2175 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
2177 this->str_offsets
.s
.section
= sectp
;
2178 this->str_offsets
.size
= bfd_section_size (sectp
);
2180 else if (section_is_p (sectp
->name
, &names
.line_str
))
2182 this->line_str
.s
.section
= sectp
;
2183 this->line_str
.size
= bfd_section_size (sectp
);
2185 else if (section_is_p (sectp
->name
, &names
.addr
))
2187 this->addr
.s
.section
= sectp
;
2188 this->addr
.size
= bfd_section_size (sectp
);
2190 else if (section_is_p (sectp
->name
, &names
.frame
))
2192 this->frame
.s
.section
= sectp
;
2193 this->frame
.size
= bfd_section_size (sectp
);
2195 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2197 this->eh_frame
.s
.section
= sectp
;
2198 this->eh_frame
.size
= bfd_section_size (sectp
);
2200 else if (section_is_p (sectp
->name
, &names
.ranges
))
2202 this->ranges
.s
.section
= sectp
;
2203 this->ranges
.size
= bfd_section_size (sectp
);
2205 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2207 this->rnglists
.s
.section
= sectp
;
2208 this->rnglists
.size
= bfd_section_size (sectp
);
2210 else if (section_is_p (sectp
->name
, &names
.types
))
2212 struct dwarf2_section_info type_section
;
2214 memset (&type_section
, 0, sizeof (type_section
));
2215 type_section
.s
.section
= sectp
;
2216 type_section
.size
= bfd_section_size (sectp
);
2218 this->types
.push_back (type_section
);
2220 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2222 this->gdb_index
.s
.section
= sectp
;
2223 this->gdb_index
.size
= bfd_section_size (sectp
);
2225 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2227 this->debug_names
.s
.section
= sectp
;
2228 this->debug_names
.size
= bfd_section_size (sectp
);
2230 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2232 this->debug_aranges
.s
.section
= sectp
;
2233 this->debug_aranges
.size
= bfd_section_size (sectp
);
2236 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2237 && bfd_section_vma (sectp
) == 0)
2238 this->has_section_at_zero
= true;
2241 /* A helper function that returns the size of a section in a safe way.
2242 If you are positive that the section has been read before using the
2243 size, then it is safe to refer to the dwarf2_section_info object's
2244 "size" field directly. In other cases, you must call this
2245 function, because for compressed sections the size field is not set
2246 correctly until the section has been read. */
2248 static bfd_size_type
2249 dwarf2_section_size (struct objfile
*objfile
,
2250 struct dwarf2_section_info
*info
)
2253 info
->read (objfile
);
2257 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2261 dwarf2_get_section_info (struct objfile
*objfile
,
2262 enum dwarf2_section_enum sect
,
2263 asection
**sectp
, const gdb_byte
**bufp
,
2264 bfd_size_type
*sizep
)
2266 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2267 struct dwarf2_section_info
*info
;
2269 /* We may see an objfile without any DWARF, in which case we just
2280 case DWARF2_DEBUG_FRAME
:
2281 info
= &data
->frame
;
2283 case DWARF2_EH_FRAME
:
2284 info
= &data
->eh_frame
;
2287 gdb_assert_not_reached ("unexpected section");
2290 info
->read (objfile
);
2292 *sectp
= info
->get_bfd_section ();
2293 *bufp
= info
->buffer
;
2294 *sizep
= info
->size
;
2297 /* A helper function to find the sections for a .dwz file. */
2300 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2302 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2304 /* Note that we only support the standard ELF names, because .dwz
2305 is ELF-only (at the time of writing). */
2306 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2308 dwz_file
->abbrev
.s
.section
= sectp
;
2309 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2311 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2313 dwz_file
->info
.s
.section
= sectp
;
2314 dwz_file
->info
.size
= bfd_section_size (sectp
);
2316 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2318 dwz_file
->str
.s
.section
= sectp
;
2319 dwz_file
->str
.size
= bfd_section_size (sectp
);
2321 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2323 dwz_file
->line
.s
.section
= sectp
;
2324 dwz_file
->line
.size
= bfd_section_size (sectp
);
2326 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2328 dwz_file
->macro
.s
.section
= sectp
;
2329 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2331 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2333 dwz_file
->gdb_index
.s
.section
= sectp
;
2334 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2336 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2338 dwz_file
->debug_names
.s
.section
= sectp
;
2339 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2343 /* See dwarf2read.h. */
2346 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2348 const char *filename
;
2349 bfd_size_type buildid_len_arg
;
2353 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2354 return dwarf2_per_objfile
->dwz_file
.get ();
2356 bfd_set_error (bfd_error_no_error
);
2357 gdb::unique_xmalloc_ptr
<char> data
2358 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2359 &buildid_len_arg
, &buildid
));
2362 if (bfd_get_error () == bfd_error_no_error
)
2364 error (_("could not read '.gnu_debugaltlink' section: %s"),
2365 bfd_errmsg (bfd_get_error ()));
2368 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2370 buildid_len
= (size_t) buildid_len_arg
;
2372 filename
= data
.get ();
2374 std::string abs_storage
;
2375 if (!IS_ABSOLUTE_PATH (filename
))
2377 gdb::unique_xmalloc_ptr
<char> abs
2378 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2380 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2381 filename
= abs_storage
.c_str ();
2384 /* First try the file name given in the section. If that doesn't
2385 work, try to use the build-id instead. */
2386 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2387 if (dwz_bfd
!= NULL
)
2389 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2390 dwz_bfd
.reset (nullptr);
2393 if (dwz_bfd
== NULL
)
2394 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2396 if (dwz_bfd
== NULL
)
2397 error (_("could not find '.gnu_debugaltlink' file for %s"),
2398 objfile_name (dwarf2_per_objfile
->objfile
));
2400 std::unique_ptr
<struct dwz_file
> result
2401 (new struct dwz_file (std::move (dwz_bfd
)));
2403 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2406 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2407 result
->dwz_bfd
.get ());
2408 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2409 return dwarf2_per_objfile
->dwz_file
.get ();
2412 /* DWARF quick_symbols_functions support. */
2414 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2415 unique line tables, so we maintain a separate table of all .debug_line
2416 derived entries to support the sharing.
2417 All the quick functions need is the list of file names. We discard the
2418 line_header when we're done and don't need to record it here. */
2419 struct quick_file_names
2421 /* The data used to construct the hash key. */
2422 struct stmt_list_hash hash
;
2424 /* The number of entries in file_names, real_names. */
2425 unsigned int num_file_names
;
2427 /* The file names from the line table, after being run through
2429 const char **file_names
;
2431 /* The file names from the line table after being run through
2432 gdb_realpath. These are computed lazily. */
2433 const char **real_names
;
2436 /* When using the index (and thus not using psymtabs), each CU has an
2437 object of this type. This is used to hold information needed by
2438 the various "quick" methods. */
2439 struct dwarf2_per_cu_quick_data
2441 /* The file table. This can be NULL if there was no file table
2442 or it's currently not read in.
2443 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2444 struct quick_file_names
*file_names
;
2446 /* The corresponding symbol table. This is NULL if symbols for this
2447 CU have not yet been read. */
2448 struct compunit_symtab
*compunit_symtab
;
2450 /* A temporary mark bit used when iterating over all CUs in
2451 expand_symtabs_matching. */
2452 unsigned int mark
: 1;
2454 /* True if we've tried to read the file table and found there isn't one.
2455 There will be no point in trying to read it again next time. */
2456 unsigned int no_file_data
: 1;
2459 /* Utility hash function for a stmt_list_hash. */
2462 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2466 if (stmt_list_hash
->dwo_unit
!= NULL
)
2467 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2468 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2472 /* Utility equality function for a stmt_list_hash. */
2475 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2476 const struct stmt_list_hash
*rhs
)
2478 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2480 if (lhs
->dwo_unit
!= NULL
2481 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2484 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2487 /* Hash function for a quick_file_names. */
2490 hash_file_name_entry (const void *e
)
2492 const struct quick_file_names
*file_data
2493 = (const struct quick_file_names
*) e
;
2495 return hash_stmt_list_entry (&file_data
->hash
);
2498 /* Equality function for a quick_file_names. */
2501 eq_file_name_entry (const void *a
, const void *b
)
2503 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2504 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2506 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2509 /* Delete function for a quick_file_names. */
2512 delete_file_name_entry (void *e
)
2514 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2517 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2519 xfree ((void*) file_data
->file_names
[i
]);
2520 if (file_data
->real_names
)
2521 xfree ((void*) file_data
->real_names
[i
]);
2524 /* The space for the struct itself lives on objfile_obstack,
2525 so we don't free it here. */
2528 /* Create a quick_file_names hash table. */
2531 create_quick_file_names_table (unsigned int nr_initial_entries
)
2533 return htab_create_alloc (nr_initial_entries
,
2534 hash_file_name_entry
, eq_file_name_entry
,
2535 delete_file_name_entry
, xcalloc
, xfree
);
2538 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2539 have to be created afterwards. You should call age_cached_comp_units after
2540 processing PER_CU->CU. dw2_setup must have been already called. */
2543 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2545 if (per_cu
->is_debug_types
)
2546 load_full_type_unit (per_cu
);
2548 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2550 if (per_cu
->cu
== NULL
)
2551 return; /* Dummy CU. */
2553 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2556 /* Read in the symbols for PER_CU. */
2559 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2561 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2563 /* Skip type_unit_groups, reading the type units they contain
2564 is handled elsewhere. */
2565 if (IS_TYPE_UNIT_GROUP (per_cu
))
2568 /* The destructor of dwarf2_queue_guard frees any entries left on
2569 the queue. After this point we're guaranteed to leave this function
2570 with the dwarf queue empty. */
2571 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2573 if (dwarf2_per_objfile
->using_index
2574 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2575 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2577 queue_comp_unit (per_cu
, language_minimal
);
2578 load_cu (per_cu
, skip_partial
);
2580 /* If we just loaded a CU from a DWO, and we're working with an index
2581 that may badly handle TUs, load all the TUs in that DWO as well.
2582 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2583 if (!per_cu
->is_debug_types
2584 && per_cu
->cu
!= NULL
2585 && per_cu
->cu
->dwo_unit
!= NULL
2586 && dwarf2_per_objfile
->index_table
!= NULL
2587 && dwarf2_per_objfile
->index_table
->version
<= 7
2588 /* DWP files aren't supported yet. */
2589 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2590 queue_and_load_all_dwo_tus (per_cu
);
2593 process_queue (dwarf2_per_objfile
);
2595 /* Age the cache, releasing compilation units that have not
2596 been used recently. */
2597 age_cached_comp_units (dwarf2_per_objfile
);
2600 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2601 the objfile from which this CU came. Returns the resulting symbol
2604 static struct compunit_symtab
*
2605 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2607 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2609 gdb_assert (dwarf2_per_objfile
->using_index
);
2610 if (!per_cu
->v
.quick
->compunit_symtab
)
2612 free_cached_comp_units
freer (dwarf2_per_objfile
);
2613 scoped_restore decrementer
= increment_reading_symtab ();
2614 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2615 process_cu_includes (dwarf2_per_objfile
);
2618 return per_cu
->v
.quick
->compunit_symtab
;
2621 /* See declaration. */
2623 dwarf2_per_cu_data
*
2624 dwarf2_per_objfile::get_cutu (int index
)
2626 if (index
>= this->all_comp_units
.size ())
2628 index
-= this->all_comp_units
.size ();
2629 gdb_assert (index
< this->all_type_units
.size ());
2630 return &this->all_type_units
[index
]->per_cu
;
2633 return this->all_comp_units
[index
];
2636 /* See declaration. */
2638 dwarf2_per_cu_data
*
2639 dwarf2_per_objfile::get_cu (int index
)
2641 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2643 return this->all_comp_units
[index
];
2646 /* See declaration. */
2649 dwarf2_per_objfile::get_tu (int index
)
2651 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2653 return this->all_type_units
[index
];
2656 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2657 objfile_obstack, and constructed with the specified field
2660 static dwarf2_per_cu_data
*
2661 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2662 struct dwarf2_section_info
*section
,
2664 sect_offset sect_off
, ULONGEST length
)
2666 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2667 dwarf2_per_cu_data
*the_cu
2668 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2669 struct dwarf2_per_cu_data
);
2670 the_cu
->sect_off
= sect_off
;
2671 the_cu
->length
= length
;
2672 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2673 the_cu
->section
= section
;
2674 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2675 struct dwarf2_per_cu_quick_data
);
2676 the_cu
->is_dwz
= is_dwz
;
2680 /* A helper for create_cus_from_index that handles a given list of
2684 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2685 const gdb_byte
*cu_list
, offset_type n_elements
,
2686 struct dwarf2_section_info
*section
,
2689 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2691 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2693 sect_offset sect_off
2694 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2695 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2698 dwarf2_per_cu_data
*per_cu
2699 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2701 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2705 /* Read the CU list from the mapped index, and use it to create all
2706 the CU objects for this objfile. */
2709 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2710 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2711 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2713 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2714 dwarf2_per_objfile
->all_comp_units
.reserve
2715 ((cu_list_elements
+ dwz_elements
) / 2);
2717 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2718 &dwarf2_per_objfile
->info
, 0);
2720 if (dwz_elements
== 0)
2723 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2724 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2728 /* Create the signatured type hash table from the index. */
2731 create_signatured_type_table_from_index
2732 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2733 struct dwarf2_section_info
*section
,
2734 const gdb_byte
*bytes
,
2735 offset_type elements
)
2737 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2739 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2740 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2742 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
2744 for (offset_type i
= 0; i
< elements
; i
+= 3)
2746 struct signatured_type
*sig_type
;
2749 cu_offset type_offset_in_tu
;
2751 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2752 sect_offset sect_off
2753 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2755 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2757 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2760 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2761 struct signatured_type
);
2762 sig_type
->signature
= signature
;
2763 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2764 sig_type
->per_cu
.is_debug_types
= 1;
2765 sig_type
->per_cu
.section
= section
;
2766 sig_type
->per_cu
.sect_off
= sect_off
;
2767 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2768 sig_type
->per_cu
.v
.quick
2769 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2770 struct dwarf2_per_cu_quick_data
);
2772 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2775 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2778 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2781 /* Create the signatured type hash table from .debug_names. */
2784 create_signatured_type_table_from_debug_names
2785 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2786 const mapped_debug_names
&map
,
2787 struct dwarf2_section_info
*section
,
2788 struct dwarf2_section_info
*abbrev_section
)
2790 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2792 section
->read (objfile
);
2793 abbrev_section
->read (objfile
);
2795 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2796 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2798 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
2800 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2802 struct signatured_type
*sig_type
;
2805 sect_offset sect_off
2806 = (sect_offset
) (extract_unsigned_integer
2807 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2809 map
.dwarf5_byte_order
));
2811 comp_unit_head cu_header
;
2812 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2814 section
->buffer
+ to_underlying (sect_off
),
2817 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2818 struct signatured_type
);
2819 sig_type
->signature
= cu_header
.signature
;
2820 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2821 sig_type
->per_cu
.is_debug_types
= 1;
2822 sig_type
->per_cu
.section
= section
;
2823 sig_type
->per_cu
.sect_off
= sect_off
;
2824 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2825 sig_type
->per_cu
.v
.quick
2826 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2827 struct dwarf2_per_cu_quick_data
);
2829 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2832 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2835 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2838 /* Read the address map data from the mapped index, and use it to
2839 populate the objfile's psymtabs_addrmap. */
2842 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2843 struct mapped_index
*index
)
2845 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2846 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2847 const gdb_byte
*iter
, *end
;
2848 struct addrmap
*mutable_map
;
2851 auto_obstack temp_obstack
;
2853 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2855 iter
= index
->address_table
.data ();
2856 end
= iter
+ index
->address_table
.size ();
2858 baseaddr
= objfile
->text_section_offset ();
2862 ULONGEST hi
, lo
, cu_index
;
2863 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2865 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2867 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2872 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2873 hex_string (lo
), hex_string (hi
));
2877 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2879 complaint (_(".gdb_index address table has invalid CU number %u"),
2880 (unsigned) cu_index
);
2884 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2885 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2886 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2887 dwarf2_per_objfile
->get_cu (cu_index
));
2890 objfile
->partial_symtabs
->psymtabs_addrmap
2891 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2894 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2895 populate the objfile's psymtabs_addrmap. */
2898 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2899 struct dwarf2_section_info
*section
)
2901 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2902 bfd
*abfd
= objfile
->obfd
;
2903 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2904 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2906 auto_obstack temp_obstack
;
2907 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2909 std::unordered_map
<sect_offset
,
2910 dwarf2_per_cu_data
*,
2911 gdb::hash_enum
<sect_offset
>>
2912 debug_info_offset_to_per_cu
;
2913 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2915 const auto insertpair
2916 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2917 if (!insertpair
.second
)
2919 warning (_("Section .debug_aranges in %s has duplicate "
2920 "debug_info_offset %s, ignoring .debug_aranges."),
2921 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2926 section
->read (objfile
);
2928 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2930 const gdb_byte
*addr
= section
->buffer
;
2932 while (addr
< section
->buffer
+ section
->size
)
2934 const gdb_byte
*const entry_addr
= addr
;
2935 unsigned int bytes_read
;
2937 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2941 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2942 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2943 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2944 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2946 warning (_("Section .debug_aranges in %s entry at offset %s "
2947 "length %s exceeds section length %s, "
2948 "ignoring .debug_aranges."),
2949 objfile_name (objfile
),
2950 plongest (entry_addr
- section
->buffer
),
2951 plongest (bytes_read
+ entry_length
),
2952 pulongest (section
->size
));
2956 /* The version number. */
2957 const uint16_t version
= read_2_bytes (abfd
, addr
);
2961 warning (_("Section .debug_aranges in %s entry at offset %s "
2962 "has unsupported version %d, ignoring .debug_aranges."),
2963 objfile_name (objfile
),
2964 plongest (entry_addr
- section
->buffer
), version
);
2968 const uint64_t debug_info_offset
2969 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2970 addr
+= offset_size
;
2971 const auto per_cu_it
2972 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2973 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2975 warning (_("Section .debug_aranges in %s entry at offset %s "
2976 "debug_info_offset %s does not exists, "
2977 "ignoring .debug_aranges."),
2978 objfile_name (objfile
),
2979 plongest (entry_addr
- section
->buffer
),
2980 pulongest (debug_info_offset
));
2983 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2985 const uint8_t address_size
= *addr
++;
2986 if (address_size
< 1 || address_size
> 8)
2988 warning (_("Section .debug_aranges in %s entry at offset %s "
2989 "address_size %u is invalid, ignoring .debug_aranges."),
2990 objfile_name (objfile
),
2991 plongest (entry_addr
- section
->buffer
), address_size
);
2995 const uint8_t segment_selector_size
= *addr
++;
2996 if (segment_selector_size
!= 0)
2998 warning (_("Section .debug_aranges in %s entry at offset %s "
2999 "segment_selector_size %u is not supported, "
3000 "ignoring .debug_aranges."),
3001 objfile_name (objfile
),
3002 plongest (entry_addr
- section
->buffer
),
3003 segment_selector_size
);
3007 /* Must pad to an alignment boundary that is twice the address
3008 size. It is undocumented by the DWARF standard but GCC does
3010 for (size_t padding
= ((-(addr
- section
->buffer
))
3011 & (2 * address_size
- 1));
3012 padding
> 0; padding
--)
3015 warning (_("Section .debug_aranges in %s entry at offset %s "
3016 "padding is not zero, ignoring .debug_aranges."),
3017 objfile_name (objfile
),
3018 plongest (entry_addr
- section
->buffer
));
3024 if (addr
+ 2 * address_size
> entry_end
)
3026 warning (_("Section .debug_aranges in %s entry at offset %s "
3027 "address list is not properly terminated, "
3028 "ignoring .debug_aranges."),
3029 objfile_name (objfile
),
3030 plongest (entry_addr
- section
->buffer
));
3033 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3035 addr
+= address_size
;
3036 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3038 addr
+= address_size
;
3039 if (start
== 0 && length
== 0)
3041 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3043 /* Symbol was eliminated due to a COMDAT group. */
3046 ULONGEST end
= start
+ length
;
3047 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3049 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3051 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3055 objfile
->partial_symtabs
->psymtabs_addrmap
3056 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3059 /* Find a slot in the mapped index INDEX for the object named NAME.
3060 If NAME is found, set *VEC_OUT to point to the CU vector in the
3061 constant pool and return true. If NAME cannot be found, return
3065 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3066 offset_type
**vec_out
)
3069 offset_type slot
, step
;
3070 int (*cmp
) (const char *, const char *);
3072 gdb::unique_xmalloc_ptr
<char> without_params
;
3073 if (current_language
->la_language
== language_cplus
3074 || current_language
->la_language
== language_fortran
3075 || current_language
->la_language
== language_d
)
3077 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3080 if (strchr (name
, '(') != NULL
)
3082 without_params
= cp_remove_params (name
);
3084 if (without_params
!= NULL
)
3085 name
= without_params
.get ();
3089 /* Index version 4 did not support case insensitive searches. But the
3090 indices for case insensitive languages are built in lowercase, therefore
3091 simulate our NAME being searched is also lowercased. */
3092 hash
= mapped_index_string_hash ((index
->version
== 4
3093 && case_sensitivity
== case_sensitive_off
3094 ? 5 : index
->version
),
3097 slot
= hash
& (index
->symbol_table
.size () - 1);
3098 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3099 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3105 const auto &bucket
= index
->symbol_table
[slot
];
3106 if (bucket
.name
== 0 && bucket
.vec
== 0)
3109 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3110 if (!cmp (name
, str
))
3112 *vec_out
= (offset_type
*) (index
->constant_pool
3113 + MAYBE_SWAP (bucket
.vec
));
3117 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3121 /* A helper function that reads the .gdb_index from BUFFER and fills
3122 in MAP. FILENAME is the name of the file containing the data;
3123 it is used for error reporting. DEPRECATED_OK is true if it is
3124 ok to use deprecated sections.
3126 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3127 out parameters that are filled in with information about the CU and
3128 TU lists in the section.
3130 Returns true if all went well, false otherwise. */
3133 read_gdb_index_from_buffer (struct objfile
*objfile
,
3134 const char *filename
,
3136 gdb::array_view
<const gdb_byte
> buffer
,
3137 struct mapped_index
*map
,
3138 const gdb_byte
**cu_list
,
3139 offset_type
*cu_list_elements
,
3140 const gdb_byte
**types_list
,
3141 offset_type
*types_list_elements
)
3143 const gdb_byte
*addr
= &buffer
[0];
3145 /* Version check. */
3146 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3147 /* Versions earlier than 3 emitted every copy of a psymbol. This
3148 causes the index to behave very poorly for certain requests. Version 3
3149 contained incomplete addrmap. So, it seems better to just ignore such
3153 static int warning_printed
= 0;
3154 if (!warning_printed
)
3156 warning (_("Skipping obsolete .gdb_index section in %s."),
3158 warning_printed
= 1;
3162 /* Index version 4 uses a different hash function than index version
3165 Versions earlier than 6 did not emit psymbols for inlined
3166 functions. Using these files will cause GDB not to be able to
3167 set breakpoints on inlined functions by name, so we ignore these
3168 indices unless the user has done
3169 "set use-deprecated-index-sections on". */
3170 if (version
< 6 && !deprecated_ok
)
3172 static int warning_printed
= 0;
3173 if (!warning_printed
)
3176 Skipping deprecated .gdb_index section in %s.\n\
3177 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3178 to use the section anyway."),
3180 warning_printed
= 1;
3184 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3185 of the TU (for symbols coming from TUs),
3186 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3187 Plus gold-generated indices can have duplicate entries for global symbols,
3188 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3189 These are just performance bugs, and we can't distinguish gdb-generated
3190 indices from gold-generated ones, so issue no warning here. */
3192 /* Indexes with higher version than the one supported by GDB may be no
3193 longer backward compatible. */
3197 map
->version
= version
;
3199 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3202 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3203 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3207 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3208 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3209 - MAYBE_SWAP (metadata
[i
]))
3213 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3214 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3216 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3219 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3220 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3222 = gdb::array_view
<mapped_index::symbol_table_slot
>
3223 ((mapped_index::symbol_table_slot
*) symbol_table
,
3224 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3227 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3232 /* Callback types for dwarf2_read_gdb_index. */
3234 typedef gdb::function_view
3235 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3236 get_gdb_index_contents_ftype
;
3237 typedef gdb::function_view
3238 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3239 get_gdb_index_contents_dwz_ftype
;
3241 /* Read .gdb_index. If everything went ok, initialize the "quick"
3242 elements of all the CUs and return 1. Otherwise, return 0. */
3245 dwarf2_read_gdb_index
3246 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3247 get_gdb_index_contents_ftype get_gdb_index_contents
,
3248 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3250 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3251 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3252 struct dwz_file
*dwz
;
3253 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3255 gdb::array_view
<const gdb_byte
> main_index_contents
3256 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3258 if (main_index_contents
.empty ())
3261 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3262 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3263 use_deprecated_index_sections
,
3264 main_index_contents
, map
.get (), &cu_list
,
3265 &cu_list_elements
, &types_list
,
3266 &types_list_elements
))
3269 /* Don't use the index if it's empty. */
3270 if (map
->symbol_table
.empty ())
3273 /* If there is a .dwz file, read it so we can get its CU list as
3275 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3278 struct mapped_index dwz_map
;
3279 const gdb_byte
*dwz_types_ignore
;
3280 offset_type dwz_types_elements_ignore
;
3282 gdb::array_view
<const gdb_byte
> dwz_index_content
3283 = get_gdb_index_contents_dwz (objfile
, dwz
);
3285 if (dwz_index_content
.empty ())
3288 if (!read_gdb_index_from_buffer (objfile
,
3289 bfd_get_filename (dwz
->dwz_bfd
.get ()),
3290 1, dwz_index_content
, &dwz_map
,
3291 &dwz_list
, &dwz_list_elements
,
3293 &dwz_types_elements_ignore
))
3295 warning (_("could not read '.gdb_index' section from %s; skipping"),
3296 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3301 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3302 dwz_list
, dwz_list_elements
);
3304 if (types_list_elements
)
3306 /* We can only handle a single .debug_types when we have an
3308 if (dwarf2_per_objfile
->types
.size () != 1)
3311 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3313 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3314 types_list
, types_list_elements
);
3317 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3319 dwarf2_per_objfile
->index_table
= std::move (map
);
3320 dwarf2_per_objfile
->using_index
= 1;
3321 dwarf2_per_objfile
->quick_file_names_table
=
3322 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3327 /* die_reader_func for dw2_get_file_names. */
3330 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3331 const gdb_byte
*info_ptr
,
3332 struct die_info
*comp_unit_die
)
3334 struct dwarf2_cu
*cu
= reader
->cu
;
3335 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3336 struct dwarf2_per_objfile
*dwarf2_per_objfile
3337 = cu
->per_cu
->dwarf2_per_objfile
;
3338 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3339 struct dwarf2_per_cu_data
*lh_cu
;
3340 struct attribute
*attr
;
3342 struct quick_file_names
*qfn
;
3344 gdb_assert (! this_cu
->is_debug_types
);
3346 /* Our callers never want to match partial units -- instead they
3347 will match the enclosing full CU. */
3348 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3350 this_cu
->v
.quick
->no_file_data
= 1;
3358 sect_offset line_offset
{};
3360 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3361 if (attr
!= nullptr)
3363 struct quick_file_names find_entry
;
3365 line_offset
= (sect_offset
) DW_UNSND (attr
);
3367 /* We may have already read in this line header (TU line header sharing).
3368 If we have we're done. */
3369 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3370 find_entry
.hash
.line_sect_off
= line_offset
;
3371 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3372 &find_entry
, INSERT
);
3375 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3379 lh
= dwarf_decode_line_header (line_offset
, cu
);
3383 lh_cu
->v
.quick
->no_file_data
= 1;
3387 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3388 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3389 qfn
->hash
.line_sect_off
= line_offset
;
3390 gdb_assert (slot
!= NULL
);
3393 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3396 if (strcmp (fnd
.name
, "<unknown>") != 0)
3399 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3401 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3403 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3404 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3405 qfn
->file_names
[i
+ offset
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3406 qfn
->real_names
= NULL
;
3408 lh_cu
->v
.quick
->file_names
= qfn
;
3411 /* A helper for the "quick" functions which attempts to read the line
3412 table for THIS_CU. */
3414 static struct quick_file_names
*
3415 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3417 /* This should never be called for TUs. */
3418 gdb_assert (! this_cu
->is_debug_types
);
3419 /* Nor type unit groups. */
3420 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3422 if (this_cu
->v
.quick
->file_names
!= NULL
)
3423 return this_cu
->v
.quick
->file_names
;
3424 /* If we know there is no line data, no point in looking again. */
3425 if (this_cu
->v
.quick
->no_file_data
)
3428 cutu_reader
reader (this_cu
);
3429 if (!reader
.dummy_p
)
3430 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3432 if (this_cu
->v
.quick
->no_file_data
)
3434 return this_cu
->v
.quick
->file_names
;
3437 /* A helper for the "quick" functions which computes and caches the
3438 real path for a given file name from the line table. */
3441 dw2_get_real_path (struct objfile
*objfile
,
3442 struct quick_file_names
*qfn
, int index
)
3444 if (qfn
->real_names
== NULL
)
3445 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3446 qfn
->num_file_names
, const char *);
3448 if (qfn
->real_names
[index
] == NULL
)
3449 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3451 return qfn
->real_names
[index
];
3454 static struct symtab
*
3455 dw2_find_last_source_symtab (struct objfile
*objfile
)
3457 struct dwarf2_per_objfile
*dwarf2_per_objfile
3458 = get_dwarf2_per_objfile (objfile
);
3459 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3460 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3465 return compunit_primary_filetab (cust
);
3468 /* Traversal function for dw2_forget_cached_source_info. */
3471 dw2_free_cached_file_names (void **slot
, void *info
)
3473 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3475 if (file_data
->real_names
)
3479 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3481 xfree ((void*) file_data
->real_names
[i
]);
3482 file_data
->real_names
[i
] = NULL
;
3490 dw2_forget_cached_source_info (struct objfile
*objfile
)
3492 struct dwarf2_per_objfile
*dwarf2_per_objfile
3493 = get_dwarf2_per_objfile (objfile
);
3495 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3496 dw2_free_cached_file_names
, NULL
);
3499 /* Helper function for dw2_map_symtabs_matching_filename that expands
3500 the symtabs and calls the iterator. */
3503 dw2_map_expand_apply (struct objfile
*objfile
,
3504 struct dwarf2_per_cu_data
*per_cu
,
3505 const char *name
, const char *real_path
,
3506 gdb::function_view
<bool (symtab
*)> callback
)
3508 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3510 /* Don't visit already-expanded CUs. */
3511 if (per_cu
->v
.quick
->compunit_symtab
)
3514 /* This may expand more than one symtab, and we want to iterate over
3516 dw2_instantiate_symtab (per_cu
, false);
3518 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3519 last_made
, callback
);
3522 /* Implementation of the map_symtabs_matching_filename method. */
3525 dw2_map_symtabs_matching_filename
3526 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3527 gdb::function_view
<bool (symtab
*)> callback
)
3529 const char *name_basename
= lbasename (name
);
3530 struct dwarf2_per_objfile
*dwarf2_per_objfile
3531 = get_dwarf2_per_objfile (objfile
);
3533 /* The rule is CUs specify all the files, including those used by
3534 any TU, so there's no need to scan TUs here. */
3536 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3538 /* We only need to look at symtabs not already expanded. */
3539 if (per_cu
->v
.quick
->compunit_symtab
)
3542 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3543 if (file_data
== NULL
)
3546 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3548 const char *this_name
= file_data
->file_names
[j
];
3549 const char *this_real_name
;
3551 if (compare_filenames_for_search (this_name
, name
))
3553 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3559 /* Before we invoke realpath, which can get expensive when many
3560 files are involved, do a quick comparison of the basenames. */
3561 if (! basenames_may_differ
3562 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3565 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3566 if (compare_filenames_for_search (this_real_name
, name
))
3568 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3574 if (real_path
!= NULL
)
3576 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3577 gdb_assert (IS_ABSOLUTE_PATH (name
));
3578 if (this_real_name
!= NULL
3579 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3581 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3593 /* Struct used to manage iterating over all CUs looking for a symbol. */
3595 struct dw2_symtab_iterator
3597 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3598 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3599 /* If set, only look for symbols that match that block. Valid values are
3600 GLOBAL_BLOCK and STATIC_BLOCK. */
3601 gdb::optional
<block_enum
> block_index
;
3602 /* The kind of symbol we're looking for. */
3604 /* The list of CUs from the index entry of the symbol,
3605 or NULL if not found. */
3607 /* The next element in VEC to look at. */
3609 /* The number of elements in VEC, or zero if there is no match. */
3611 /* Have we seen a global version of the symbol?
3612 If so we can ignore all further global instances.
3613 This is to work around gold/15646, inefficient gold-generated
3618 /* Initialize the index symtab iterator ITER. */
3621 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3622 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3623 gdb::optional
<block_enum
> block_index
,
3627 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3628 iter
->block_index
= block_index
;
3629 iter
->domain
= domain
;
3631 iter
->global_seen
= 0;
3633 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3635 /* index is NULL if OBJF_READNOW. */
3636 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3637 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3645 /* Return the next matching CU or NULL if there are no more. */
3647 static struct dwarf2_per_cu_data
*
3648 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3650 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3652 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3654 offset_type cu_index_and_attrs
=
3655 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3656 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3657 gdb_index_symbol_kind symbol_kind
=
3658 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3659 /* Only check the symbol attributes if they're present.
3660 Indices prior to version 7 don't record them,
3661 and indices >= 7 may elide them for certain symbols
3662 (gold does this). */
3664 (dwarf2_per_objfile
->index_table
->version
>= 7
3665 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3667 /* Don't crash on bad data. */
3668 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3669 + dwarf2_per_objfile
->all_type_units
.size ()))
3671 complaint (_(".gdb_index entry has bad CU index"
3673 objfile_name (dwarf2_per_objfile
->objfile
));
3677 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3679 /* Skip if already read in. */
3680 if (per_cu
->v
.quick
->compunit_symtab
)
3683 /* Check static vs global. */
3686 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3688 if (iter
->block_index
.has_value ())
3690 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3692 if (is_static
!= want_static
)
3696 /* Work around gold/15646. */
3697 if (!is_static
&& iter
->global_seen
)
3700 iter
->global_seen
= 1;
3703 /* Only check the symbol's kind if it has one. */
3706 switch (iter
->domain
)
3709 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3710 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3711 /* Some types are also in VAR_DOMAIN. */
3712 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3716 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3720 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3724 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3739 static struct compunit_symtab
*
3740 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3741 const char *name
, domain_enum domain
)
3743 struct compunit_symtab
*stab_best
= NULL
;
3744 struct dwarf2_per_objfile
*dwarf2_per_objfile
3745 = get_dwarf2_per_objfile (objfile
);
3747 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3749 struct dw2_symtab_iterator iter
;
3750 struct dwarf2_per_cu_data
*per_cu
;
3752 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3754 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3756 struct symbol
*sym
, *with_opaque
= NULL
;
3757 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3758 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3759 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3761 sym
= block_find_symbol (block
, name
, domain
,
3762 block_find_non_opaque_type_preferred
,
3765 /* Some caution must be observed with overloaded functions
3766 and methods, since the index will not contain any overload
3767 information (but NAME might contain it). */
3770 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3772 if (with_opaque
!= NULL
3773 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3776 /* Keep looking through other CUs. */
3783 dw2_print_stats (struct objfile
*objfile
)
3785 struct dwarf2_per_objfile
*dwarf2_per_objfile
3786 = get_dwarf2_per_objfile (objfile
);
3787 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3788 + dwarf2_per_objfile
->all_type_units
.size ());
3791 for (int i
= 0; i
< total
; ++i
)
3793 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3795 if (!per_cu
->v
.quick
->compunit_symtab
)
3798 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3799 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3802 /* This dumps minimal information about the index.
3803 It is called via "mt print objfiles".
3804 One use is to verify .gdb_index has been loaded by the
3805 gdb.dwarf2/gdb-index.exp testcase. */
3808 dw2_dump (struct objfile
*objfile
)
3810 struct dwarf2_per_objfile
*dwarf2_per_objfile
3811 = get_dwarf2_per_objfile (objfile
);
3813 gdb_assert (dwarf2_per_objfile
->using_index
);
3814 printf_filtered (".gdb_index:");
3815 if (dwarf2_per_objfile
->index_table
!= NULL
)
3817 printf_filtered (" version %d\n",
3818 dwarf2_per_objfile
->index_table
->version
);
3821 printf_filtered (" faked for \"readnow\"\n");
3822 printf_filtered ("\n");
3826 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3827 const char *func_name
)
3829 struct dwarf2_per_objfile
*dwarf2_per_objfile
3830 = get_dwarf2_per_objfile (objfile
);
3832 struct dw2_symtab_iterator iter
;
3833 struct dwarf2_per_cu_data
*per_cu
;
3835 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3837 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3838 dw2_instantiate_symtab (per_cu
, false);
3843 dw2_expand_all_symtabs (struct objfile
*objfile
)
3845 struct dwarf2_per_objfile
*dwarf2_per_objfile
3846 = get_dwarf2_per_objfile (objfile
);
3847 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3848 + dwarf2_per_objfile
->all_type_units
.size ());
3850 for (int i
= 0; i
< total_units
; ++i
)
3852 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3854 /* We don't want to directly expand a partial CU, because if we
3855 read it with the wrong language, then assertion failures can
3856 be triggered later on. See PR symtab/23010. So, tell
3857 dw2_instantiate_symtab to skip partial CUs -- any important
3858 partial CU will be read via DW_TAG_imported_unit anyway. */
3859 dw2_instantiate_symtab (per_cu
, true);
3864 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3865 const char *fullname
)
3867 struct dwarf2_per_objfile
*dwarf2_per_objfile
3868 = get_dwarf2_per_objfile (objfile
);
3870 /* We don't need to consider type units here.
3871 This is only called for examining code, e.g. expand_line_sal.
3872 There can be an order of magnitude (or more) more type units
3873 than comp units, and we avoid them if we can. */
3875 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3877 /* We only need to look at symtabs not already expanded. */
3878 if (per_cu
->v
.quick
->compunit_symtab
)
3881 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3882 if (file_data
== NULL
)
3885 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3887 const char *this_fullname
= file_data
->file_names
[j
];
3889 if (filename_cmp (this_fullname
, fullname
) == 0)
3891 dw2_instantiate_symtab (per_cu
, false);
3899 dw2_map_matching_symbols
3900 (struct objfile
*objfile
,
3901 const lookup_name_info
&name
, domain_enum domain
,
3903 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3904 symbol_compare_ftype
*ordered_compare
)
3906 /* Currently unimplemented; used for Ada. The function can be called if the
3907 current language is Ada for a non-Ada objfile using GNU index. As Ada
3908 does not look for non-Ada symbols this function should just return. */
3911 /* Starting from a search name, return the string that finds the upper
3912 bound of all strings that start with SEARCH_NAME in a sorted name
3913 list. Returns the empty string to indicate that the upper bound is
3914 the end of the list. */
3917 make_sort_after_prefix_name (const char *search_name
)
3919 /* When looking to complete "func", we find the upper bound of all
3920 symbols that start with "func" by looking for where we'd insert
3921 the closest string that would follow "func" in lexicographical
3922 order. Usually, that's "func"-with-last-character-incremented,
3923 i.e. "fund". Mind non-ASCII characters, though. Usually those
3924 will be UTF-8 multi-byte sequences, but we can't be certain.
3925 Especially mind the 0xff character, which is a valid character in
3926 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3927 rule out compilers allowing it in identifiers. Note that
3928 conveniently, strcmp/strcasecmp are specified to compare
3929 characters interpreted as unsigned char. So what we do is treat
3930 the whole string as a base 256 number composed of a sequence of
3931 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3932 to 0, and carries 1 to the following more-significant position.
3933 If the very first character in SEARCH_NAME ends up incremented
3934 and carries/overflows, then the upper bound is the end of the
3935 list. The string after the empty string is also the empty
3938 Some examples of this operation:
3940 SEARCH_NAME => "+1" RESULT
3944 "\xff" "a" "\xff" => "\xff" "b"
3949 Then, with these symbols for example:
3955 completing "func" looks for symbols between "func" and
3956 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3957 which finds "func" and "func1", but not "fund".
3961 funcÿ (Latin1 'ÿ' [0xff])
3965 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3966 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3970 ÿÿ (Latin1 'ÿ' [0xff])
3973 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3974 the end of the list.
3976 std::string after
= search_name
;
3977 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3979 if (!after
.empty ())
3980 after
.back () = (unsigned char) after
.back () + 1;
3984 /* See declaration. */
3986 std::pair
<std::vector
<name_component
>::const_iterator
,
3987 std::vector
<name_component
>::const_iterator
>
3988 mapped_index_base::find_name_components_bounds
3989 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3992 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3994 const char *lang_name
3995 = lookup_name_without_params
.language_lookup_name (lang
).c_str ();
3997 /* Comparison function object for lower_bound that matches against a
3998 given symbol name. */
3999 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4002 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4003 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4004 return name_cmp (elem_name
, name
) < 0;
4007 /* Comparison function object for upper_bound that matches against a
4008 given symbol name. */
4009 auto lookup_compare_upper
= [&] (const char *name
,
4010 const name_component
&elem
)
4012 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4013 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4014 return name_cmp (name
, elem_name
) < 0;
4017 auto begin
= this->name_components
.begin ();
4018 auto end
= this->name_components
.end ();
4020 /* Find the lower bound. */
4023 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
4026 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
4029 /* Find the upper bound. */
4032 if (lookup_name_without_params
.completion_mode ())
4034 /* In completion mode, we want UPPER to point past all
4035 symbols names that have the same prefix. I.e., with
4036 these symbols, and completing "func":
4038 function << lower bound
4040 other_function << upper bound
4042 We find the upper bound by looking for the insertion
4043 point of "func"-with-last-character-incremented,
4045 std::string after
= make_sort_after_prefix_name (lang_name
);
4048 return std::lower_bound (lower
, end
, after
.c_str (),
4049 lookup_compare_lower
);
4052 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4055 return {lower
, upper
};
4058 /* See declaration. */
4061 mapped_index_base::build_name_components ()
4063 if (!this->name_components
.empty ())
4066 this->name_components_casing
= case_sensitivity
;
4068 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4070 /* The code below only knows how to break apart components of C++
4071 symbol names (and other languages that use '::' as
4072 namespace/module separator) and Ada symbol names. */
4073 auto count
= this->symbol_name_count ();
4074 for (offset_type idx
= 0; idx
< count
; idx
++)
4076 if (this->symbol_name_slot_invalid (idx
))
4079 const char *name
= this->symbol_name_at (idx
);
4081 /* Add each name component to the name component table. */
4082 unsigned int previous_len
= 0;
4084 if (strstr (name
, "::") != nullptr)
4086 for (unsigned int current_len
= cp_find_first_component (name
);
4087 name
[current_len
] != '\0';
4088 current_len
+= cp_find_first_component (name
+ current_len
))
4090 gdb_assert (name
[current_len
] == ':');
4091 this->name_components
.push_back ({previous_len
, idx
});
4092 /* Skip the '::'. */
4094 previous_len
= current_len
;
4099 /* Handle the Ada encoded (aka mangled) form here. */
4100 for (const char *iter
= strstr (name
, "__");
4102 iter
= strstr (iter
, "__"))
4104 this->name_components
.push_back ({previous_len
, idx
});
4106 previous_len
= iter
- name
;
4110 this->name_components
.push_back ({previous_len
, idx
});
4113 /* Sort name_components elements by name. */
4114 auto name_comp_compare
= [&] (const name_component
&left
,
4115 const name_component
&right
)
4117 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4118 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4120 const char *left_name
= left_qualified
+ left
.name_offset
;
4121 const char *right_name
= right_qualified
+ right
.name_offset
;
4123 return name_cmp (left_name
, right_name
) < 0;
4126 std::sort (this->name_components
.begin (),
4127 this->name_components
.end (),
4131 /* Helper for dw2_expand_symtabs_matching that works with a
4132 mapped_index_base instead of the containing objfile. This is split
4133 to a separate function in order to be able to unit test the
4134 name_components matching using a mock mapped_index_base. For each
4135 symbol name that matches, calls MATCH_CALLBACK, passing it the
4136 symbol's index in the mapped_index_base symbol table. */
4139 dw2_expand_symtabs_matching_symbol
4140 (mapped_index_base
&index
,
4141 const lookup_name_info
&lookup_name_in
,
4142 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4143 enum search_domain kind
,
4144 gdb::function_view
<bool (offset_type
)> match_callback
)
4146 lookup_name_info lookup_name_without_params
4147 = lookup_name_in
.make_ignore_params ();
4149 /* Build the symbol name component sorted vector, if we haven't
4151 index
.build_name_components ();
4153 /* The same symbol may appear more than once in the range though.
4154 E.g., if we're looking for symbols that complete "w", and we have
4155 a symbol named "w1::w2", we'll find the two name components for
4156 that same symbol in the range. To be sure we only call the
4157 callback once per symbol, we first collect the symbol name
4158 indexes that matched in a temporary vector and ignore
4160 std::vector
<offset_type
> matches
;
4162 struct name_and_matcher
4164 symbol_name_matcher_ftype
*matcher
;
4165 const std::string
&name
;
4167 bool operator== (const name_and_matcher
&other
) const
4169 return matcher
== other
.matcher
&& name
== other
.name
;
4173 /* A vector holding all the different symbol name matchers, for all
4175 std::vector
<name_and_matcher
> matchers
;
4177 for (int i
= 0; i
< nr_languages
; i
++)
4179 enum language lang_e
= (enum language
) i
;
4181 const language_defn
*lang
= language_def (lang_e
);
4182 symbol_name_matcher_ftype
*name_matcher
4183 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4185 name_and_matcher key
{
4187 lookup_name_without_params
.language_lookup_name (lang_e
)
4190 /* Don't insert the same comparison routine more than once.
4191 Note that we do this linear walk. This is not a problem in
4192 practice because the number of supported languages is
4194 if (std::find (matchers
.begin (), matchers
.end (), key
)
4197 matchers
.push_back (std::move (key
));
4200 = index
.find_name_components_bounds (lookup_name_without_params
,
4203 /* Now for each symbol name in range, check to see if we have a name
4204 match, and if so, call the MATCH_CALLBACK callback. */
4206 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4208 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4210 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4211 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4214 matches
.push_back (bounds
.first
->idx
);
4218 std::sort (matches
.begin (), matches
.end ());
4220 /* Finally call the callback, once per match. */
4222 for (offset_type idx
: matches
)
4226 if (!match_callback (idx
))
4232 /* Above we use a type wider than idx's for 'prev', since 0 and
4233 (offset_type)-1 are both possible values. */
4234 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4239 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4241 /* A mock .gdb_index/.debug_names-like name index table, enough to
4242 exercise dw2_expand_symtabs_matching_symbol, which works with the
4243 mapped_index_base interface. Builds an index from the symbol list
4244 passed as parameter to the constructor. */
4245 class mock_mapped_index
: public mapped_index_base
4248 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4249 : m_symbol_table (symbols
)
4252 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4254 /* Return the number of names in the symbol table. */
4255 size_t symbol_name_count () const override
4257 return m_symbol_table
.size ();
4260 /* Get the name of the symbol at IDX in the symbol table. */
4261 const char *symbol_name_at (offset_type idx
) const override
4263 return m_symbol_table
[idx
];
4267 gdb::array_view
<const char *> m_symbol_table
;
4270 /* Convenience function that converts a NULL pointer to a "<null>"
4271 string, to pass to print routines. */
4274 string_or_null (const char *str
)
4276 return str
!= NULL
? str
: "<null>";
4279 /* Check if a lookup_name_info built from
4280 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4281 index. EXPECTED_LIST is the list of expected matches, in expected
4282 matching order. If no match expected, then an empty list is
4283 specified. Returns true on success. On failure prints a warning
4284 indicating the file:line that failed, and returns false. */
4287 check_match (const char *file
, int line
,
4288 mock_mapped_index
&mock_index
,
4289 const char *name
, symbol_name_match_type match_type
,
4290 bool completion_mode
,
4291 std::initializer_list
<const char *> expected_list
)
4293 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4295 bool matched
= true;
4297 auto mismatch
= [&] (const char *expected_str
,
4300 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4301 "expected=\"%s\", got=\"%s\"\n"),
4303 (match_type
== symbol_name_match_type::FULL
4305 name
, string_or_null (expected_str
), string_or_null (got
));
4309 auto expected_it
= expected_list
.begin ();
4310 auto expected_end
= expected_list
.end ();
4312 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4314 [&] (offset_type idx
)
4316 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4317 const char *expected_str
4318 = expected_it
== expected_end
? NULL
: *expected_it
++;
4320 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4321 mismatch (expected_str
, matched_name
);
4325 const char *expected_str
4326 = expected_it
== expected_end
? NULL
: *expected_it
++;
4327 if (expected_str
!= NULL
)
4328 mismatch (expected_str
, NULL
);
4333 /* The symbols added to the mock mapped_index for testing (in
4335 static const char *test_symbols
[] = {
4344 "ns2::tmpl<int>::foo2",
4345 "(anonymous namespace)::A::B::C",
4347 /* These are used to check that the increment-last-char in the
4348 matching algorithm for completion doesn't match "t1_fund" when
4349 completing "t1_func". */
4355 /* A UTF-8 name with multi-byte sequences to make sure that
4356 cp-name-parser understands this as a single identifier ("função"
4357 is "function" in PT). */
4360 /* \377 (0xff) is Latin1 'ÿ'. */
4363 /* \377 (0xff) is Latin1 'ÿ'. */
4367 /* A name with all sorts of complications. Starts with "z" to make
4368 it easier for the completion tests below. */
4369 #define Z_SYM_NAME \
4370 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4371 "::tuple<(anonymous namespace)::ui*, " \
4372 "std::default_delete<(anonymous namespace)::ui>, void>"
4377 /* Returns true if the mapped_index_base::find_name_component_bounds
4378 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4379 in completion mode. */
4382 check_find_bounds_finds (mapped_index_base
&index
,
4383 const char *search_name
,
4384 gdb::array_view
<const char *> expected_syms
)
4386 lookup_name_info
lookup_name (search_name
,
4387 symbol_name_match_type::FULL
, true);
4389 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4392 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4393 if (distance
!= expected_syms
.size ())
4396 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4398 auto nc_elem
= bounds
.first
+ exp_elem
;
4399 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4400 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4407 /* Test the lower-level mapped_index::find_name_component_bounds
4411 test_mapped_index_find_name_component_bounds ()
4413 mock_mapped_index
mock_index (test_symbols
);
4415 mock_index
.build_name_components ();
4417 /* Test the lower-level mapped_index::find_name_component_bounds
4418 method in completion mode. */
4420 static const char *expected_syms
[] = {
4425 SELF_CHECK (check_find_bounds_finds (mock_index
,
4426 "t1_func", expected_syms
));
4429 /* Check that the increment-last-char in the name matching algorithm
4430 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4432 static const char *expected_syms1
[] = {
4436 SELF_CHECK (check_find_bounds_finds (mock_index
,
4437 "\377", expected_syms1
));
4439 static const char *expected_syms2
[] = {
4442 SELF_CHECK (check_find_bounds_finds (mock_index
,
4443 "\377\377", expected_syms2
));
4447 /* Test dw2_expand_symtabs_matching_symbol. */
4450 test_dw2_expand_symtabs_matching_symbol ()
4452 mock_mapped_index
mock_index (test_symbols
);
4454 /* We let all tests run until the end even if some fails, for debug
4456 bool any_mismatch
= false;
4458 /* Create the expected symbols list (an initializer_list). Needed
4459 because lists have commas, and we need to pass them to CHECK,
4460 which is a macro. */
4461 #define EXPECT(...) { __VA_ARGS__ }
4463 /* Wrapper for check_match that passes down the current
4464 __FILE__/__LINE__. */
4465 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4466 any_mismatch |= !check_match (__FILE__, __LINE__, \
4468 NAME, MATCH_TYPE, COMPLETION_MODE, \
4471 /* Identity checks. */
4472 for (const char *sym
: test_symbols
)
4474 /* Should be able to match all existing symbols. */
4475 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4478 /* Should be able to match all existing symbols with
4480 std::string with_params
= std::string (sym
) + "(int)";
4481 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4484 /* Should be able to match all existing symbols with
4485 parameters and qualifiers. */
4486 with_params
= std::string (sym
) + " ( int ) const";
4487 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4490 /* This should really find sym, but cp-name-parser.y doesn't
4491 know about lvalue/rvalue qualifiers yet. */
4492 with_params
= std::string (sym
) + " ( int ) &&";
4493 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4497 /* Check that the name matching algorithm for completion doesn't get
4498 confused with Latin1 'ÿ' / 0xff. */
4500 static const char str
[] = "\377";
4501 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4502 EXPECT ("\377", "\377\377123"));
4505 /* Check that the increment-last-char in the matching algorithm for
4506 completion doesn't match "t1_fund" when completing "t1_func". */
4508 static const char str
[] = "t1_func";
4509 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4510 EXPECT ("t1_func", "t1_func1"));
4513 /* Check that completion mode works at each prefix of the expected
4516 static const char str
[] = "function(int)";
4517 size_t len
= strlen (str
);
4520 for (size_t i
= 1; i
< len
; i
++)
4522 lookup
.assign (str
, i
);
4523 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4524 EXPECT ("function"));
4528 /* While "w" is a prefix of both components, the match function
4529 should still only be called once. */
4531 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4533 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4537 /* Same, with a "complicated" symbol. */
4539 static const char str
[] = Z_SYM_NAME
;
4540 size_t len
= strlen (str
);
4543 for (size_t i
= 1; i
< len
; i
++)
4545 lookup
.assign (str
, i
);
4546 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4547 EXPECT (Z_SYM_NAME
));
4551 /* In FULL mode, an incomplete symbol doesn't match. */
4553 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4557 /* A complete symbol with parameters matches any overload, since the
4558 index has no overload info. */
4560 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4561 EXPECT ("std::zfunction", "std::zfunction2"));
4562 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4563 EXPECT ("std::zfunction", "std::zfunction2"));
4564 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4565 EXPECT ("std::zfunction", "std::zfunction2"));
4568 /* Check that whitespace is ignored appropriately. A symbol with a
4569 template argument list. */
4571 static const char expected
[] = "ns::foo<int>";
4572 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4574 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4578 /* Check that whitespace is ignored appropriately. A symbol with a
4579 template argument list that includes a pointer. */
4581 static const char expected
[] = "ns::foo<char*>";
4582 /* Try both completion and non-completion modes. */
4583 static const bool completion_mode
[2] = {false, true};
4584 for (size_t i
= 0; i
< 2; i
++)
4586 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4587 completion_mode
[i
], EXPECT (expected
));
4588 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4589 completion_mode
[i
], EXPECT (expected
));
4591 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4592 completion_mode
[i
], EXPECT (expected
));
4593 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4594 completion_mode
[i
], EXPECT (expected
));
4599 /* Check method qualifiers are ignored. */
4600 static const char expected
[] = "ns::foo<char*>";
4601 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4602 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4603 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4604 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4605 CHECK_MATCH ("foo < char * > ( int ) const",
4606 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4607 CHECK_MATCH ("foo < char * > ( int ) &&",
4608 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4611 /* Test lookup names that don't match anything. */
4613 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4616 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4620 /* Some wild matching tests, exercising "(anonymous namespace)",
4621 which should not be confused with a parameter list. */
4623 static const char *syms
[] = {
4627 "A :: B :: C ( int )",
4632 for (const char *s
: syms
)
4634 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4635 EXPECT ("(anonymous namespace)::A::B::C"));
4640 static const char expected
[] = "ns2::tmpl<int>::foo2";
4641 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4643 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4647 SELF_CHECK (!any_mismatch
);
4656 test_mapped_index_find_name_component_bounds ();
4657 test_dw2_expand_symtabs_matching_symbol ();
4660 }} // namespace selftests::dw2_expand_symtabs_matching
4662 #endif /* GDB_SELF_TEST */
4664 /* If FILE_MATCHER is NULL or if PER_CU has
4665 dwarf2_per_cu_quick_data::MARK set (see
4666 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4667 EXPANSION_NOTIFY on it. */
4670 dw2_expand_symtabs_matching_one
4671 (struct dwarf2_per_cu_data
*per_cu
,
4672 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4673 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4675 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4677 bool symtab_was_null
4678 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4680 dw2_instantiate_symtab (per_cu
, false);
4682 if (expansion_notify
!= NULL
4684 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4685 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4689 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4690 matched, to expand corresponding CUs that were marked. IDX is the
4691 index of the symbol name that matched. */
4694 dw2_expand_marked_cus
4695 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4696 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4697 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4700 offset_type
*vec
, vec_len
, vec_idx
;
4701 bool global_seen
= false;
4702 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4704 vec
= (offset_type
*) (index
.constant_pool
4705 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4706 vec_len
= MAYBE_SWAP (vec
[0]);
4707 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4709 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4710 /* This value is only valid for index versions >= 7. */
4711 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4712 gdb_index_symbol_kind symbol_kind
=
4713 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4714 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4715 /* Only check the symbol attributes if they're present.
4716 Indices prior to version 7 don't record them,
4717 and indices >= 7 may elide them for certain symbols
4718 (gold does this). */
4721 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4723 /* Work around gold/15646. */
4726 if (!is_static
&& global_seen
)
4732 /* Only check the symbol's kind if it has one. */
4737 case VARIABLES_DOMAIN
:
4738 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4741 case FUNCTIONS_DOMAIN
:
4742 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4746 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4749 case MODULES_DOMAIN
:
4750 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4758 /* Don't crash on bad data. */
4759 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4760 + dwarf2_per_objfile
->all_type_units
.size ()))
4762 complaint (_(".gdb_index entry has bad CU index"
4764 objfile_name (dwarf2_per_objfile
->objfile
));
4768 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4769 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4774 /* If FILE_MATCHER is non-NULL, set all the
4775 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4776 that match FILE_MATCHER. */
4779 dw_expand_symtabs_matching_file_matcher
4780 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4781 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4783 if (file_matcher
== NULL
)
4786 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4788 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4790 NULL
, xcalloc
, xfree
));
4791 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4793 NULL
, xcalloc
, xfree
));
4795 /* The rule is CUs specify all the files, including those used by
4796 any TU, so there's no need to scan TUs here. */
4798 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4802 per_cu
->v
.quick
->mark
= 0;
4804 /* We only need to look at symtabs not already expanded. */
4805 if (per_cu
->v
.quick
->compunit_symtab
)
4808 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4809 if (file_data
== NULL
)
4812 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4814 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4816 per_cu
->v
.quick
->mark
= 1;
4820 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4822 const char *this_real_name
;
4824 if (file_matcher (file_data
->file_names
[j
], false))
4826 per_cu
->v
.quick
->mark
= 1;
4830 /* Before we invoke realpath, which can get expensive when many
4831 files are involved, do a quick comparison of the basenames. */
4832 if (!basenames_may_differ
4833 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4837 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4838 if (file_matcher (this_real_name
, false))
4840 per_cu
->v
.quick
->mark
= 1;
4845 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4846 ? visited_found
.get ()
4847 : visited_not_found
.get (),
4854 dw2_expand_symtabs_matching
4855 (struct objfile
*objfile
,
4856 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4857 const lookup_name_info
&lookup_name
,
4858 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4859 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4860 enum search_domain kind
)
4862 struct dwarf2_per_objfile
*dwarf2_per_objfile
4863 = get_dwarf2_per_objfile (objfile
);
4865 /* index_table is NULL if OBJF_READNOW. */
4866 if (!dwarf2_per_objfile
->index_table
)
4869 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4871 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4873 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
4875 kind
, [&] (offset_type idx
)
4877 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4878 expansion_notify
, kind
);
4883 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4886 static struct compunit_symtab
*
4887 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4892 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4893 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4896 if (cust
->includes
== NULL
)
4899 for (i
= 0; cust
->includes
[i
]; ++i
)
4901 struct compunit_symtab
*s
= cust
->includes
[i
];
4903 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4911 static struct compunit_symtab
*
4912 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4913 struct bound_minimal_symbol msymbol
,
4915 struct obj_section
*section
,
4918 struct dwarf2_per_cu_data
*data
;
4919 struct compunit_symtab
*result
;
4921 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4924 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4925 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4926 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4930 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4931 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4932 paddress (get_objfile_arch (objfile
), pc
));
4935 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4938 gdb_assert (result
!= NULL
);
4943 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4944 void *data
, int need_fullname
)
4946 struct dwarf2_per_objfile
*dwarf2_per_objfile
4947 = get_dwarf2_per_objfile (objfile
);
4949 if (!dwarf2_per_objfile
->filenames_cache
)
4951 dwarf2_per_objfile
->filenames_cache
.emplace ();
4953 htab_up
visited (htab_create_alloc (10,
4954 htab_hash_pointer
, htab_eq_pointer
,
4955 NULL
, xcalloc
, xfree
));
4957 /* The rule is CUs specify all the files, including those used
4958 by any TU, so there's no need to scan TUs here. We can
4959 ignore file names coming from already-expanded CUs. */
4961 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4963 if (per_cu
->v
.quick
->compunit_symtab
)
4965 void **slot
= htab_find_slot (visited
.get (),
4966 per_cu
->v
.quick
->file_names
,
4969 *slot
= per_cu
->v
.quick
->file_names
;
4973 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4975 /* We only need to look at symtabs not already expanded. */
4976 if (per_cu
->v
.quick
->compunit_symtab
)
4979 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4980 if (file_data
== NULL
)
4983 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4986 /* Already visited. */
4991 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4993 const char *filename
= file_data
->file_names
[j
];
4994 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4999 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5001 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5004 this_real_name
= gdb_realpath (filename
);
5005 (*fun
) (filename
, this_real_name
.get (), data
);
5010 dw2_has_symbols (struct objfile
*objfile
)
5015 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5018 dw2_find_last_source_symtab
,
5019 dw2_forget_cached_source_info
,
5020 dw2_map_symtabs_matching_filename
,
5024 dw2_expand_symtabs_for_function
,
5025 dw2_expand_all_symtabs
,
5026 dw2_expand_symtabs_with_fullname
,
5027 dw2_map_matching_symbols
,
5028 dw2_expand_symtabs_matching
,
5029 dw2_find_pc_sect_compunit_symtab
,
5031 dw2_map_symbol_filenames
5034 /* DWARF-5 debug_names reader. */
5036 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5037 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5039 /* A helper function that reads the .debug_names section in SECTION
5040 and fills in MAP. FILENAME is the name of the file containing the
5041 section; it is used for error reporting.
5043 Returns true if all went well, false otherwise. */
5046 read_debug_names_from_section (struct objfile
*objfile
,
5047 const char *filename
,
5048 struct dwarf2_section_info
*section
,
5049 mapped_debug_names
&map
)
5051 if (section
->empty ())
5054 /* Older elfutils strip versions could keep the section in the main
5055 executable while splitting it for the separate debug info file. */
5056 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5059 section
->read (objfile
);
5061 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5063 const gdb_byte
*addr
= section
->buffer
;
5065 bfd
*const abfd
= section
->get_bfd_owner ();
5067 unsigned int bytes_read
;
5068 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5071 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5072 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5073 if (bytes_read
+ length
!= section
->size
)
5075 /* There may be multiple per-CU indices. */
5076 warning (_("Section .debug_names in %s length %s does not match "
5077 "section length %s, ignoring .debug_names."),
5078 filename
, plongest (bytes_read
+ length
),
5079 pulongest (section
->size
));
5083 /* The version number. */
5084 uint16_t version
= read_2_bytes (abfd
, addr
);
5088 warning (_("Section .debug_names in %s has unsupported version %d, "
5089 "ignoring .debug_names."),
5095 uint16_t padding
= read_2_bytes (abfd
, addr
);
5099 warning (_("Section .debug_names in %s has unsupported padding %d, "
5100 "ignoring .debug_names."),
5105 /* comp_unit_count - The number of CUs in the CU list. */
5106 map
.cu_count
= read_4_bytes (abfd
, addr
);
5109 /* local_type_unit_count - The number of TUs in the local TU
5111 map
.tu_count
= read_4_bytes (abfd
, addr
);
5114 /* foreign_type_unit_count - The number of TUs in the foreign TU
5116 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5118 if (foreign_tu_count
!= 0)
5120 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5121 "ignoring .debug_names."),
5122 filename
, static_cast<unsigned long> (foreign_tu_count
));
5126 /* bucket_count - The number of hash buckets in the hash lookup
5128 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5131 /* name_count - The number of unique names in the index. */
5132 map
.name_count
= read_4_bytes (abfd
, addr
);
5135 /* abbrev_table_size - The size in bytes of the abbreviations
5137 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5140 /* augmentation_string_size - The size in bytes of the augmentation
5141 string. This value is rounded up to a multiple of 4. */
5142 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5144 map
.augmentation_is_gdb
= ((augmentation_string_size
5145 == sizeof (dwarf5_augmentation
))
5146 && memcmp (addr
, dwarf5_augmentation
,
5147 sizeof (dwarf5_augmentation
)) == 0);
5148 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5149 addr
+= augmentation_string_size
;
5152 map
.cu_table_reordered
= addr
;
5153 addr
+= map
.cu_count
* map
.offset_size
;
5155 /* List of Local TUs */
5156 map
.tu_table_reordered
= addr
;
5157 addr
+= map
.tu_count
* map
.offset_size
;
5159 /* Hash Lookup Table */
5160 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5161 addr
+= map
.bucket_count
* 4;
5162 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5163 addr
+= map
.name_count
* 4;
5166 map
.name_table_string_offs_reordered
= addr
;
5167 addr
+= map
.name_count
* map
.offset_size
;
5168 map
.name_table_entry_offs_reordered
= addr
;
5169 addr
+= map
.name_count
* map
.offset_size
;
5171 const gdb_byte
*abbrev_table_start
= addr
;
5174 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5179 const auto insertpair
5180 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5181 if (!insertpair
.second
)
5183 warning (_("Section .debug_names in %s has duplicate index %s, "
5184 "ignoring .debug_names."),
5185 filename
, pulongest (index_num
));
5188 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5189 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5194 mapped_debug_names::index_val::attr attr
;
5195 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5197 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5199 if (attr
.form
== DW_FORM_implicit_const
)
5201 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5205 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5207 indexval
.attr_vec
.push_back (std::move (attr
));
5210 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5212 warning (_("Section .debug_names in %s has abbreviation_table "
5213 "of size %s vs. written as %u, ignoring .debug_names."),
5214 filename
, plongest (addr
- abbrev_table_start
),
5218 map
.entry_pool
= addr
;
5223 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5227 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5228 const mapped_debug_names
&map
,
5229 dwarf2_section_info
§ion
,
5232 sect_offset sect_off_prev
;
5233 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5235 sect_offset sect_off_next
;
5236 if (i
< map
.cu_count
)
5239 = (sect_offset
) (extract_unsigned_integer
5240 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5242 map
.dwarf5_byte_order
));
5245 sect_off_next
= (sect_offset
) section
.size
;
5248 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5249 dwarf2_per_cu_data
*per_cu
5250 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5251 sect_off_prev
, length
);
5252 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5254 sect_off_prev
= sect_off_next
;
5258 /* Read the CU list from the mapped index, and use it to create all
5259 the CU objects for this dwarf2_per_objfile. */
5262 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5263 const mapped_debug_names
&map
,
5264 const mapped_debug_names
&dwz_map
)
5266 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5267 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5269 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5270 dwarf2_per_objfile
->info
,
5271 false /* is_dwz */);
5273 if (dwz_map
.cu_count
== 0)
5276 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5277 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5281 /* Read .debug_names. If everything went ok, initialize the "quick"
5282 elements of all the CUs and return true. Otherwise, return false. */
5285 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5287 std::unique_ptr
<mapped_debug_names
> map
5288 (new mapped_debug_names (dwarf2_per_objfile
));
5289 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5290 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5292 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5293 &dwarf2_per_objfile
->debug_names
,
5297 /* Don't use the index if it's empty. */
5298 if (map
->name_count
== 0)
5301 /* If there is a .dwz file, read it so we can get its CU list as
5303 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5306 if (!read_debug_names_from_section (objfile
,
5307 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5308 &dwz
->debug_names
, dwz_map
))
5310 warning (_("could not read '.debug_names' section from %s; skipping"),
5311 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5316 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5318 if (map
->tu_count
!= 0)
5320 /* We can only handle a single .debug_types when we have an
5322 if (dwarf2_per_objfile
->types
.size () != 1)
5325 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5327 create_signatured_type_table_from_debug_names
5328 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5331 create_addrmap_from_aranges (dwarf2_per_objfile
,
5332 &dwarf2_per_objfile
->debug_aranges
);
5334 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5335 dwarf2_per_objfile
->using_index
= 1;
5336 dwarf2_per_objfile
->quick_file_names_table
=
5337 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5342 /* Type used to manage iterating over all CUs looking for a symbol for
5345 class dw2_debug_names_iterator
5348 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5349 gdb::optional
<block_enum
> block_index
,
5352 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5353 m_addr (find_vec_in_debug_names (map
, name
))
5356 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5357 search_domain search
, uint32_t namei
)
5360 m_addr (find_vec_in_debug_names (map
, namei
))
5363 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5364 block_enum block_index
, domain_enum domain
,
5366 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5367 m_addr (find_vec_in_debug_names (map
, namei
))
5370 /* Return the next matching CU or NULL if there are no more. */
5371 dwarf2_per_cu_data
*next ();
5374 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5376 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5379 /* The internalized form of .debug_names. */
5380 const mapped_debug_names
&m_map
;
5382 /* If set, only look for symbols that match that block. Valid values are
5383 GLOBAL_BLOCK and STATIC_BLOCK. */
5384 const gdb::optional
<block_enum
> m_block_index
;
5386 /* The kind of symbol we're looking for. */
5387 const domain_enum m_domain
= UNDEF_DOMAIN
;
5388 const search_domain m_search
= ALL_DOMAIN
;
5390 /* The list of CUs from the index entry of the symbol, or NULL if
5392 const gdb_byte
*m_addr
;
5396 mapped_debug_names::namei_to_name (uint32_t namei
) const
5398 const ULONGEST namei_string_offs
5399 = extract_unsigned_integer ((name_table_string_offs_reordered
5400 + namei
* offset_size
),
5403 return read_indirect_string_at_offset
5404 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5407 /* Find a slot in .debug_names for the object named NAME. If NAME is
5408 found, return pointer to its pool data. If NAME cannot be found,
5412 dw2_debug_names_iterator::find_vec_in_debug_names
5413 (const mapped_debug_names
&map
, const char *name
)
5415 int (*cmp
) (const char *, const char *);
5417 gdb::unique_xmalloc_ptr
<char> without_params
;
5418 if (current_language
->la_language
== language_cplus
5419 || current_language
->la_language
== language_fortran
5420 || current_language
->la_language
== language_d
)
5422 /* NAME is already canonical. Drop any qualifiers as
5423 .debug_names does not contain any. */
5425 if (strchr (name
, '(') != NULL
)
5427 without_params
= cp_remove_params (name
);
5428 if (without_params
!= NULL
)
5429 name
= without_params
.get ();
5433 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5435 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5437 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5438 (map
.bucket_table_reordered
5439 + (full_hash
% map
.bucket_count
)), 4,
5440 map
.dwarf5_byte_order
);
5444 if (namei
>= map
.name_count
)
5446 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5448 namei
, map
.name_count
,
5449 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5455 const uint32_t namei_full_hash
5456 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5457 (map
.hash_table_reordered
+ namei
), 4,
5458 map
.dwarf5_byte_order
);
5459 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5462 if (full_hash
== namei_full_hash
)
5464 const char *const namei_string
= map
.namei_to_name (namei
);
5466 #if 0 /* An expensive sanity check. */
5467 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5469 complaint (_("Wrong .debug_names hash for string at index %u "
5471 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5476 if (cmp (namei_string
, name
) == 0)
5478 const ULONGEST namei_entry_offs
5479 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5480 + namei
* map
.offset_size
),
5481 map
.offset_size
, map
.dwarf5_byte_order
);
5482 return map
.entry_pool
+ namei_entry_offs
;
5487 if (namei
>= map
.name_count
)
5493 dw2_debug_names_iterator::find_vec_in_debug_names
5494 (const mapped_debug_names
&map
, uint32_t namei
)
5496 if (namei
>= map
.name_count
)
5498 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5500 namei
, map
.name_count
,
5501 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5505 const ULONGEST namei_entry_offs
5506 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5507 + namei
* map
.offset_size
),
5508 map
.offset_size
, map
.dwarf5_byte_order
);
5509 return map
.entry_pool
+ namei_entry_offs
;
5512 /* See dw2_debug_names_iterator. */
5514 dwarf2_per_cu_data
*
5515 dw2_debug_names_iterator::next ()
5520 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5521 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5522 bfd
*const abfd
= objfile
->obfd
;
5526 unsigned int bytes_read
;
5527 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5528 m_addr
+= bytes_read
;
5532 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5533 if (indexval_it
== m_map
.abbrev_map
.cend ())
5535 complaint (_("Wrong .debug_names undefined abbrev code %s "
5537 pulongest (abbrev
), objfile_name (objfile
));
5540 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5541 enum class symbol_linkage
{
5545 } symbol_linkage_
= symbol_linkage::unknown
;
5546 dwarf2_per_cu_data
*per_cu
= NULL
;
5547 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5552 case DW_FORM_implicit_const
:
5553 ull
= attr
.implicit_const
;
5555 case DW_FORM_flag_present
:
5559 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5560 m_addr
+= bytes_read
;
5563 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5564 dwarf_form_name (attr
.form
),
5565 objfile_name (objfile
));
5568 switch (attr
.dw_idx
)
5570 case DW_IDX_compile_unit
:
5571 /* Don't crash on bad data. */
5572 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5574 complaint (_(".debug_names entry has bad CU index %s"
5577 objfile_name (dwarf2_per_objfile
->objfile
));
5580 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5582 case DW_IDX_type_unit
:
5583 /* Don't crash on bad data. */
5584 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5586 complaint (_(".debug_names entry has bad TU index %s"
5589 objfile_name (dwarf2_per_objfile
->objfile
));
5592 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5594 case DW_IDX_GNU_internal
:
5595 if (!m_map
.augmentation_is_gdb
)
5597 symbol_linkage_
= symbol_linkage::static_
;
5599 case DW_IDX_GNU_external
:
5600 if (!m_map
.augmentation_is_gdb
)
5602 symbol_linkage_
= symbol_linkage::extern_
;
5607 /* Skip if already read in. */
5608 if (per_cu
->v
.quick
->compunit_symtab
)
5611 /* Check static vs global. */
5612 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5614 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5615 const bool symbol_is_static
=
5616 symbol_linkage_
== symbol_linkage::static_
;
5617 if (want_static
!= symbol_is_static
)
5621 /* Match dw2_symtab_iter_next, symbol_kind
5622 and debug_names::psymbol_tag. */
5626 switch (indexval
.dwarf_tag
)
5628 case DW_TAG_variable
:
5629 case DW_TAG_subprogram
:
5630 /* Some types are also in VAR_DOMAIN. */
5631 case DW_TAG_typedef
:
5632 case DW_TAG_structure_type
:
5639 switch (indexval
.dwarf_tag
)
5641 case DW_TAG_typedef
:
5642 case DW_TAG_structure_type
:
5649 switch (indexval
.dwarf_tag
)
5652 case DW_TAG_variable
:
5659 switch (indexval
.dwarf_tag
)
5671 /* Match dw2_expand_symtabs_matching, symbol_kind and
5672 debug_names::psymbol_tag. */
5675 case VARIABLES_DOMAIN
:
5676 switch (indexval
.dwarf_tag
)
5678 case DW_TAG_variable
:
5684 case FUNCTIONS_DOMAIN
:
5685 switch (indexval
.dwarf_tag
)
5687 case DW_TAG_subprogram
:
5694 switch (indexval
.dwarf_tag
)
5696 case DW_TAG_typedef
:
5697 case DW_TAG_structure_type
:
5703 case MODULES_DOMAIN
:
5704 switch (indexval
.dwarf_tag
)
5718 static struct compunit_symtab
*
5719 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5720 const char *name
, domain_enum domain
)
5722 struct dwarf2_per_objfile
*dwarf2_per_objfile
5723 = get_dwarf2_per_objfile (objfile
);
5725 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5728 /* index is NULL if OBJF_READNOW. */
5731 const auto &map
= *mapp
;
5733 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5735 struct compunit_symtab
*stab_best
= NULL
;
5736 struct dwarf2_per_cu_data
*per_cu
;
5737 while ((per_cu
= iter
.next ()) != NULL
)
5739 struct symbol
*sym
, *with_opaque
= NULL
;
5740 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5741 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5742 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5744 sym
= block_find_symbol (block
, name
, domain
,
5745 block_find_non_opaque_type_preferred
,
5748 /* Some caution must be observed with overloaded functions and
5749 methods, since the index will not contain any overload
5750 information (but NAME might contain it). */
5753 && strcmp_iw (sym
->search_name (), name
) == 0)
5755 if (with_opaque
!= NULL
5756 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5759 /* Keep looking through other CUs. */
5765 /* This dumps minimal information about .debug_names. It is called
5766 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5767 uses this to verify that .debug_names has been loaded. */
5770 dw2_debug_names_dump (struct objfile
*objfile
)
5772 struct dwarf2_per_objfile
*dwarf2_per_objfile
5773 = get_dwarf2_per_objfile (objfile
);
5775 gdb_assert (dwarf2_per_objfile
->using_index
);
5776 printf_filtered (".debug_names:");
5777 if (dwarf2_per_objfile
->debug_names_table
)
5778 printf_filtered (" exists\n");
5780 printf_filtered (" faked for \"readnow\"\n");
5781 printf_filtered ("\n");
5785 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5786 const char *func_name
)
5788 struct dwarf2_per_objfile
*dwarf2_per_objfile
5789 = get_dwarf2_per_objfile (objfile
);
5791 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5792 if (dwarf2_per_objfile
->debug_names_table
)
5794 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5796 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5798 struct dwarf2_per_cu_data
*per_cu
;
5799 while ((per_cu
= iter
.next ()) != NULL
)
5800 dw2_instantiate_symtab (per_cu
, false);
5805 dw2_debug_names_map_matching_symbols
5806 (struct objfile
*objfile
,
5807 const lookup_name_info
&name
, domain_enum domain
,
5809 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5810 symbol_compare_ftype
*ordered_compare
)
5812 struct dwarf2_per_objfile
*dwarf2_per_objfile
5813 = get_dwarf2_per_objfile (objfile
);
5815 /* debug_names_table is NULL if OBJF_READNOW. */
5816 if (!dwarf2_per_objfile
->debug_names_table
)
5819 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5820 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5822 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5823 auto matcher
= [&] (const char *symname
)
5825 if (ordered_compare
== nullptr)
5827 return ordered_compare (symname
, match_name
) == 0;
5830 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5831 [&] (offset_type namei
)
5833 /* The name was matched, now expand corresponding CUs that were
5835 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5837 struct dwarf2_per_cu_data
*per_cu
;
5838 while ((per_cu
= iter
.next ()) != NULL
)
5839 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5843 /* It's a shame we couldn't do this inside the
5844 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5845 that have already been expanded. Instead, this loop matches what
5846 the psymtab code does. */
5847 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5849 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5850 if (cust
!= nullptr)
5852 const struct block
*block
5853 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5854 if (!iterate_over_symbols_terminated (block
, name
,
5862 dw2_debug_names_expand_symtabs_matching
5863 (struct objfile
*objfile
,
5864 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5865 const lookup_name_info
&lookup_name
,
5866 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5867 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5868 enum search_domain kind
)
5870 struct dwarf2_per_objfile
*dwarf2_per_objfile
5871 = get_dwarf2_per_objfile (objfile
);
5873 /* debug_names_table is NULL if OBJF_READNOW. */
5874 if (!dwarf2_per_objfile
->debug_names_table
)
5877 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5879 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5881 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
5883 kind
, [&] (offset_type namei
)
5885 /* The name was matched, now expand corresponding CUs that were
5887 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5889 struct dwarf2_per_cu_data
*per_cu
;
5890 while ((per_cu
= iter
.next ()) != NULL
)
5891 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5897 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5900 dw2_find_last_source_symtab
,
5901 dw2_forget_cached_source_info
,
5902 dw2_map_symtabs_matching_filename
,
5903 dw2_debug_names_lookup_symbol
,
5905 dw2_debug_names_dump
,
5906 dw2_debug_names_expand_symtabs_for_function
,
5907 dw2_expand_all_symtabs
,
5908 dw2_expand_symtabs_with_fullname
,
5909 dw2_debug_names_map_matching_symbols
,
5910 dw2_debug_names_expand_symtabs_matching
,
5911 dw2_find_pc_sect_compunit_symtab
,
5913 dw2_map_symbol_filenames
5916 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5917 to either a dwarf2_per_objfile or dwz_file object. */
5919 template <typename T
>
5920 static gdb::array_view
<const gdb_byte
>
5921 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5923 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5925 if (section
->empty ())
5928 /* Older elfutils strip versions could keep the section in the main
5929 executable while splitting it for the separate debug info file. */
5930 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5933 section
->read (obj
);
5935 /* dwarf2_section_info::size is a bfd_size_type, while
5936 gdb::array_view works with size_t. On 32-bit hosts, with
5937 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5938 is 32-bit. So we need an explicit narrowing conversion here.
5939 This is fine, because it's impossible to allocate or mmap an
5940 array/buffer larger than what size_t can represent. */
5941 return gdb::make_array_view (section
->buffer
, section
->size
);
5944 /* Lookup the index cache for the contents of the index associated to
5947 static gdb::array_view
<const gdb_byte
>
5948 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5950 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5951 if (build_id
== nullptr)
5954 return global_index_cache
.lookup_gdb_index (build_id
,
5955 &dwarf2_obj
->index_cache_res
);
5958 /* Same as the above, but for DWZ. */
5960 static gdb::array_view
<const gdb_byte
>
5961 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5963 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5964 if (build_id
== nullptr)
5967 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5970 /* See symfile.h. */
5973 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5975 struct dwarf2_per_objfile
*dwarf2_per_objfile
5976 = get_dwarf2_per_objfile (objfile
);
5978 /* If we're about to read full symbols, don't bother with the
5979 indices. In this case we also don't care if some other debug
5980 format is making psymtabs, because they are all about to be
5982 if ((objfile
->flags
& OBJF_READNOW
))
5984 dwarf2_per_objfile
->using_index
= 1;
5985 create_all_comp_units (dwarf2_per_objfile
);
5986 create_all_type_units (dwarf2_per_objfile
);
5987 dwarf2_per_objfile
->quick_file_names_table
5988 = create_quick_file_names_table
5989 (dwarf2_per_objfile
->all_comp_units
.size ());
5991 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5992 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5994 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5996 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5997 struct dwarf2_per_cu_quick_data
);
6000 /* Return 1 so that gdb sees the "quick" functions. However,
6001 these functions will be no-ops because we will have expanded
6003 *index_kind
= dw_index_kind::GDB_INDEX
;
6007 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6009 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6013 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6014 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6015 get_gdb_index_contents_from_section
<dwz_file
>))
6017 *index_kind
= dw_index_kind::GDB_INDEX
;
6021 /* ... otherwise, try to find the index in the index cache. */
6022 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6023 get_gdb_index_contents_from_cache
,
6024 get_gdb_index_contents_from_cache_dwz
))
6026 global_index_cache
.hit ();
6027 *index_kind
= dw_index_kind::GDB_INDEX
;
6031 global_index_cache
.miss ();
6037 /* Build a partial symbol table. */
6040 dwarf2_build_psymtabs (struct objfile
*objfile
)
6042 struct dwarf2_per_objfile
*dwarf2_per_objfile
6043 = get_dwarf2_per_objfile (objfile
);
6045 init_psymbol_list (objfile
, 1024);
6049 /* This isn't really ideal: all the data we allocate on the
6050 objfile's obstack is still uselessly kept around. However,
6051 freeing it seems unsafe. */
6052 psymtab_discarder
psymtabs (objfile
);
6053 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6056 /* (maybe) store an index in the cache. */
6057 global_index_cache
.store (dwarf2_per_objfile
);
6059 catch (const gdb_exception_error
&except
)
6061 exception_print (gdb_stderr
, except
);
6065 /* Return the total length of the CU described by HEADER. */
6068 get_cu_length (const struct comp_unit_head
*header
)
6070 return header
->initial_length_size
+ header
->length
;
6073 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6076 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6078 sect_offset bottom
= cu_header
->sect_off
;
6079 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6081 return sect_off
>= bottom
&& sect_off
< top
;
6084 /* Find the base address of the compilation unit for range lists and
6085 location lists. It will normally be specified by DW_AT_low_pc.
6086 In DWARF-3 draft 4, the base address could be overridden by
6087 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6088 compilation units with discontinuous ranges. */
6091 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6093 struct attribute
*attr
;
6096 cu
->base_address
= 0;
6098 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6099 if (attr
!= nullptr)
6101 cu
->base_address
= attr
->value_as_address ();
6106 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6107 if (attr
!= nullptr)
6109 cu
->base_address
= attr
->value_as_address ();
6115 /* Read in the comp unit header information from the debug_info at info_ptr.
6116 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6117 NOTE: This leaves members offset, first_die_offset to be filled in
6120 static const gdb_byte
*
6121 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6122 const gdb_byte
*info_ptr
,
6123 struct dwarf2_section_info
*section
,
6124 rcuh_kind section_kind
)
6127 unsigned int bytes_read
;
6128 const char *filename
= section
->get_file_name ();
6129 bfd
*abfd
= section
->get_bfd_owner ();
6131 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6132 cu_header
->initial_length_size
= bytes_read
;
6133 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6134 info_ptr
+= bytes_read
;
6135 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6136 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6137 error (_("Dwarf Error: wrong version in compilation unit header "
6138 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6139 cu_header
->version
, filename
);
6141 if (cu_header
->version
< 5)
6142 switch (section_kind
)
6144 case rcuh_kind::COMPILE
:
6145 cu_header
->unit_type
= DW_UT_compile
;
6147 case rcuh_kind::TYPE
:
6148 cu_header
->unit_type
= DW_UT_type
;
6151 internal_error (__FILE__
, __LINE__
,
6152 _("read_comp_unit_head: invalid section_kind"));
6156 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6157 (read_1_byte (abfd
, info_ptr
));
6159 switch (cu_header
->unit_type
)
6163 case DW_UT_skeleton
:
6164 case DW_UT_split_compile
:
6165 if (section_kind
!= rcuh_kind::COMPILE
)
6166 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6167 "(is %s, should be %s) [in module %s]"),
6168 dwarf_unit_type_name (cu_header
->unit_type
),
6169 dwarf_unit_type_name (DW_UT_type
), filename
);
6172 case DW_UT_split_type
:
6173 section_kind
= rcuh_kind::TYPE
;
6176 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6177 "(is %#04x, should be one of: %s, %s, %s, %s or %s) "
6178 "[in module %s]"), cu_header
->unit_type
,
6179 dwarf_unit_type_name (DW_UT_compile
),
6180 dwarf_unit_type_name (DW_UT_skeleton
),
6181 dwarf_unit_type_name (DW_UT_split_compile
),
6182 dwarf_unit_type_name (DW_UT_type
),
6183 dwarf_unit_type_name (DW_UT_split_type
), filename
);
6186 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6189 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6192 info_ptr
+= bytes_read
;
6193 if (cu_header
->version
< 5)
6195 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6198 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6199 if (signed_addr
< 0)
6200 internal_error (__FILE__
, __LINE__
,
6201 _("read_comp_unit_head: dwarf from non elf file"));
6202 cu_header
->signed_addr_p
= signed_addr
;
6204 bool header_has_signature
= section_kind
== rcuh_kind::TYPE
6205 || cu_header
->unit_type
== DW_UT_skeleton
6206 || cu_header
->unit_type
== DW_UT_split_compile
;
6208 if (header_has_signature
)
6210 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6214 if (section_kind
== rcuh_kind::TYPE
)
6216 LONGEST type_offset
;
6217 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6218 info_ptr
+= bytes_read
;
6219 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6220 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6221 error (_("Dwarf Error: Too big type_offset in compilation unit "
6222 "header (is %s) [in module %s]"), plongest (type_offset
),
6229 /* Helper function that returns the proper abbrev section for
6232 static struct dwarf2_section_info
*
6233 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6235 struct dwarf2_section_info
*abbrev
;
6236 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6238 if (this_cu
->is_dwz
)
6239 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6241 abbrev
= &dwarf2_per_objfile
->abbrev
;
6246 /* Subroutine of read_and_check_comp_unit_head and
6247 read_and_check_type_unit_head to simplify them.
6248 Perform various error checking on the header. */
6251 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6252 struct comp_unit_head
*header
,
6253 struct dwarf2_section_info
*section
,
6254 struct dwarf2_section_info
*abbrev_section
)
6256 const char *filename
= section
->get_file_name ();
6258 if (to_underlying (header
->abbrev_sect_off
)
6259 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6260 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6261 "(offset %s + 6) [in module %s]"),
6262 sect_offset_str (header
->abbrev_sect_off
),
6263 sect_offset_str (header
->sect_off
),
6266 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6267 avoid potential 32-bit overflow. */
6268 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6270 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6271 "(offset %s + 0) [in module %s]"),
6272 header
->length
, sect_offset_str (header
->sect_off
),
6276 /* Read in a CU/TU header and perform some basic error checking.
6277 The contents of the header are stored in HEADER.
6278 The result is a pointer to the start of the first DIE. */
6280 static const gdb_byte
*
6281 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6282 struct comp_unit_head
*header
,
6283 struct dwarf2_section_info
*section
,
6284 struct dwarf2_section_info
*abbrev_section
,
6285 const gdb_byte
*info_ptr
,
6286 rcuh_kind section_kind
)
6288 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6290 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6292 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6294 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6296 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6302 /* Fetch the abbreviation table offset from a comp or type unit header. */
6305 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6306 struct dwarf2_section_info
*section
,
6307 sect_offset sect_off
)
6309 bfd
*abfd
= section
->get_bfd_owner ();
6310 const gdb_byte
*info_ptr
;
6311 unsigned int initial_length_size
, offset_size
;
6314 section
->read (dwarf2_per_objfile
->objfile
);
6315 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6316 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6317 offset_size
= initial_length_size
== 4 ? 4 : 8;
6318 info_ptr
+= initial_length_size
;
6320 version
= read_2_bytes (abfd
, info_ptr
);
6324 /* Skip unit type and address size. */
6328 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6331 /* Allocate a new partial symtab for file named NAME and mark this new
6332 partial symtab as being an include of PST. */
6335 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6336 struct objfile
*objfile
)
6338 dwarf2_psymtab
*subpst
= new dwarf2_psymtab (name
, objfile
);
6340 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6342 /* It shares objfile->objfile_obstack. */
6343 subpst
->dirname
= pst
->dirname
;
6346 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6347 subpst
->dependencies
[0] = pst
;
6348 subpst
->number_of_dependencies
= 1;
6350 /* No private part is necessary for include psymtabs. This property
6351 can be used to differentiate between such include psymtabs and
6352 the regular ones. */
6353 subpst
->per_cu_data
= nullptr;
6356 /* Read the Line Number Program data and extract the list of files
6357 included by the source file represented by PST. Build an include
6358 partial symtab for each of these included files. */
6361 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6362 struct die_info
*die
,
6363 dwarf2_psymtab
*pst
)
6366 struct attribute
*attr
;
6368 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6369 if (attr
!= nullptr)
6370 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6372 return; /* No linetable, so no includes. */
6374 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6375 that we pass in the raw text_low here; that is ok because we're
6376 only decoding the line table to make include partial symtabs, and
6377 so the addresses aren't really used. */
6378 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6379 pst
->raw_text_low (), 1);
6383 hash_signatured_type (const void *item
)
6385 const struct signatured_type
*sig_type
6386 = (const struct signatured_type
*) item
;
6388 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6389 return sig_type
->signature
;
6393 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6395 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6396 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6398 return lhs
->signature
== rhs
->signature
;
6401 /* Allocate a hash table for signatured types. */
6404 allocate_signatured_type_table (struct objfile
*objfile
)
6406 return htab_create_alloc_ex (41,
6407 hash_signatured_type
,
6410 &objfile
->objfile_obstack
,
6411 hashtab_obstack_allocate
,
6412 dummy_obstack_deallocate
);
6415 /* A helper function to add a signatured type CU to a table. */
6418 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6420 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6421 std::vector
<signatured_type
*> *all_type_units
6422 = (std::vector
<signatured_type
*> *) datum
;
6424 all_type_units
->push_back (sigt
);
6429 /* A helper for create_debug_types_hash_table. Read types from SECTION
6430 and fill them into TYPES_HTAB. It will process only type units,
6431 therefore DW_UT_type. */
6434 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6435 struct dwo_file
*dwo_file
,
6436 dwarf2_section_info
*section
, htab_t
&types_htab
,
6437 rcuh_kind section_kind
)
6439 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6440 struct dwarf2_section_info
*abbrev_section
;
6442 const gdb_byte
*info_ptr
, *end_ptr
;
6444 abbrev_section
= (dwo_file
!= NULL
6445 ? &dwo_file
->sections
.abbrev
6446 : &dwarf2_per_objfile
->abbrev
);
6448 if (dwarf_read_debug
)
6449 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6450 section
->get_name (),
6451 abbrev_section
->get_file_name ());
6453 section
->read (objfile
);
6454 info_ptr
= section
->buffer
;
6456 if (info_ptr
== NULL
)
6459 /* We can't set abfd until now because the section may be empty or
6460 not present, in which case the bfd is unknown. */
6461 abfd
= section
->get_bfd_owner ();
6463 /* We don't use cutu_reader here because we don't need to read
6464 any dies: the signature is in the header. */
6466 end_ptr
= info_ptr
+ section
->size
;
6467 while (info_ptr
< end_ptr
)
6469 struct signatured_type
*sig_type
;
6470 struct dwo_unit
*dwo_tu
;
6472 const gdb_byte
*ptr
= info_ptr
;
6473 struct comp_unit_head header
;
6474 unsigned int length
;
6476 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6478 /* Initialize it due to a false compiler warning. */
6479 header
.signature
= -1;
6480 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6482 /* We need to read the type's signature in order to build the hash
6483 table, but we don't need anything else just yet. */
6485 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6486 abbrev_section
, ptr
, section_kind
);
6488 length
= get_cu_length (&header
);
6490 /* Skip dummy type units. */
6491 if (ptr
>= info_ptr
+ length
6492 || peek_abbrev_code (abfd
, ptr
) == 0
6493 || header
.unit_type
!= DW_UT_type
)
6499 if (types_htab
== NULL
)
6502 types_htab
= allocate_dwo_unit_table (objfile
);
6504 types_htab
= allocate_signatured_type_table (objfile
);
6510 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6512 dwo_tu
->dwo_file
= dwo_file
;
6513 dwo_tu
->signature
= header
.signature
;
6514 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6515 dwo_tu
->section
= section
;
6516 dwo_tu
->sect_off
= sect_off
;
6517 dwo_tu
->length
= length
;
6521 /* N.B.: type_offset is not usable if this type uses a DWO file.
6522 The real type_offset is in the DWO file. */
6524 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6525 struct signatured_type
);
6526 sig_type
->signature
= header
.signature
;
6527 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6528 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6529 sig_type
->per_cu
.is_debug_types
= 1;
6530 sig_type
->per_cu
.section
= section
;
6531 sig_type
->per_cu
.sect_off
= sect_off
;
6532 sig_type
->per_cu
.length
= length
;
6535 slot
= htab_find_slot (types_htab
,
6536 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6538 gdb_assert (slot
!= NULL
);
6541 sect_offset dup_sect_off
;
6545 const struct dwo_unit
*dup_tu
6546 = (const struct dwo_unit
*) *slot
;
6548 dup_sect_off
= dup_tu
->sect_off
;
6552 const struct signatured_type
*dup_tu
6553 = (const struct signatured_type
*) *slot
;
6555 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6558 complaint (_("debug type entry at offset %s is duplicate to"
6559 " the entry at offset %s, signature %s"),
6560 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6561 hex_string (header
.signature
));
6563 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6565 if (dwarf_read_debug
> 1)
6566 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6567 sect_offset_str (sect_off
),
6568 hex_string (header
.signature
));
6574 /* Create the hash table of all entries in the .debug_types
6575 (or .debug_types.dwo) section(s).
6576 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6577 otherwise it is NULL.
6579 The result is a pointer to the hash table or NULL if there are no types.
6581 Note: This function processes DWO files only, not DWP files. */
6584 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6585 struct dwo_file
*dwo_file
,
6586 gdb::array_view
<dwarf2_section_info
> type_sections
,
6589 for (dwarf2_section_info
§ion
: type_sections
)
6590 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6591 types_htab
, rcuh_kind::TYPE
);
6594 /* Create the hash table of all entries in the .debug_types section,
6595 and initialize all_type_units.
6596 The result is zero if there is an error (e.g. missing .debug_types section),
6597 otherwise non-zero. */
6600 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6602 htab_t types_htab
= NULL
;
6604 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6605 &dwarf2_per_objfile
->info
, types_htab
,
6606 rcuh_kind::COMPILE
);
6607 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6608 dwarf2_per_objfile
->types
, types_htab
);
6609 if (types_htab
== NULL
)
6611 dwarf2_per_objfile
->signatured_types
= NULL
;
6615 dwarf2_per_objfile
->signatured_types
= types_htab
;
6617 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6618 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6620 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6621 &dwarf2_per_objfile
->all_type_units
);
6626 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6627 If SLOT is non-NULL, it is the entry to use in the hash table.
6628 Otherwise we find one. */
6630 static struct signatured_type
*
6631 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6634 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6636 if (dwarf2_per_objfile
->all_type_units
.size ()
6637 == dwarf2_per_objfile
->all_type_units
.capacity ())
6638 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6640 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6641 struct signatured_type
);
6643 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6644 sig_type
->signature
= sig
;
6645 sig_type
->per_cu
.is_debug_types
= 1;
6646 if (dwarf2_per_objfile
->using_index
)
6648 sig_type
->per_cu
.v
.quick
=
6649 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6650 struct dwarf2_per_cu_quick_data
);
6655 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6658 gdb_assert (*slot
== NULL
);
6660 /* The rest of sig_type must be filled in by the caller. */
6664 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6665 Fill in SIG_ENTRY with DWO_ENTRY. */
6668 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6669 struct signatured_type
*sig_entry
,
6670 struct dwo_unit
*dwo_entry
)
6672 /* Make sure we're not clobbering something we don't expect to. */
6673 gdb_assert (! sig_entry
->per_cu
.queued
);
6674 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6675 if (dwarf2_per_objfile
->using_index
)
6677 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6678 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6681 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6682 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6683 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6684 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6685 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6687 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6688 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6689 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6690 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6691 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6692 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6693 sig_entry
->dwo_unit
= dwo_entry
;
6696 /* Subroutine of lookup_signatured_type.
6697 If we haven't read the TU yet, create the signatured_type data structure
6698 for a TU to be read in directly from a DWO file, bypassing the stub.
6699 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6700 using .gdb_index, then when reading a CU we want to stay in the DWO file
6701 containing that CU. Otherwise we could end up reading several other DWO
6702 files (due to comdat folding) to process the transitive closure of all the
6703 mentioned TUs, and that can be slow. The current DWO file will have every
6704 type signature that it needs.
6705 We only do this for .gdb_index because in the psymtab case we already have
6706 to read all the DWOs to build the type unit groups. */
6708 static struct signatured_type
*
6709 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6711 struct dwarf2_per_objfile
*dwarf2_per_objfile
6712 = cu
->per_cu
->dwarf2_per_objfile
;
6713 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6714 struct dwo_file
*dwo_file
;
6715 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6716 struct signatured_type find_sig_entry
, *sig_entry
;
6719 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6721 /* If TU skeletons have been removed then we may not have read in any
6723 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6725 dwarf2_per_objfile
->signatured_types
6726 = allocate_signatured_type_table (objfile
);
6729 /* We only ever need to read in one copy of a signatured type.
6730 Use the global signatured_types array to do our own comdat-folding
6731 of types. If this is the first time we're reading this TU, and
6732 the TU has an entry in .gdb_index, replace the recorded data from
6733 .gdb_index with this TU. */
6735 find_sig_entry
.signature
= sig
;
6736 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6737 &find_sig_entry
, INSERT
);
6738 sig_entry
= (struct signatured_type
*) *slot
;
6740 /* We can get here with the TU already read, *or* in the process of being
6741 read. Don't reassign the global entry to point to this DWO if that's
6742 the case. Also note that if the TU is already being read, it may not
6743 have come from a DWO, the program may be a mix of Fission-compiled
6744 code and non-Fission-compiled code. */
6746 /* Have we already tried to read this TU?
6747 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6748 needn't exist in the global table yet). */
6749 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6752 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6753 dwo_unit of the TU itself. */
6754 dwo_file
= cu
->dwo_unit
->dwo_file
;
6756 /* Ok, this is the first time we're reading this TU. */
6757 if (dwo_file
->tus
== NULL
)
6759 find_dwo_entry
.signature
= sig
;
6760 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6761 if (dwo_entry
== NULL
)
6764 /* If the global table doesn't have an entry for this TU, add one. */
6765 if (sig_entry
== NULL
)
6766 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6768 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6769 sig_entry
->per_cu
.tu_read
= 1;
6773 /* Subroutine of lookup_signatured_type.
6774 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6775 then try the DWP file. If the TU stub (skeleton) has been removed then
6776 it won't be in .gdb_index. */
6778 static struct signatured_type
*
6779 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6781 struct dwarf2_per_objfile
*dwarf2_per_objfile
6782 = cu
->per_cu
->dwarf2_per_objfile
;
6783 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6784 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6785 struct dwo_unit
*dwo_entry
;
6786 struct signatured_type find_sig_entry
, *sig_entry
;
6789 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6790 gdb_assert (dwp_file
!= NULL
);
6792 /* If TU skeletons have been removed then we may not have read in any
6794 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6796 dwarf2_per_objfile
->signatured_types
6797 = allocate_signatured_type_table (objfile
);
6800 find_sig_entry
.signature
= sig
;
6801 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6802 &find_sig_entry
, INSERT
);
6803 sig_entry
= (struct signatured_type
*) *slot
;
6805 /* Have we already tried to read this TU?
6806 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6807 needn't exist in the global table yet). */
6808 if (sig_entry
!= NULL
)
6811 if (dwp_file
->tus
== NULL
)
6813 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6814 sig
, 1 /* is_debug_types */);
6815 if (dwo_entry
== NULL
)
6818 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6819 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6824 /* Lookup a signature based type for DW_FORM_ref_sig8.
6825 Returns NULL if signature SIG is not present in the table.
6826 It is up to the caller to complain about this. */
6828 static struct signatured_type
*
6829 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6831 struct dwarf2_per_objfile
*dwarf2_per_objfile
6832 = cu
->per_cu
->dwarf2_per_objfile
;
6835 && dwarf2_per_objfile
->using_index
)
6837 /* We're in a DWO/DWP file, and we're using .gdb_index.
6838 These cases require special processing. */
6839 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6840 return lookup_dwo_signatured_type (cu
, sig
);
6842 return lookup_dwp_signatured_type (cu
, sig
);
6846 struct signatured_type find_entry
, *entry
;
6848 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6850 find_entry
.signature
= sig
;
6851 entry
= ((struct signatured_type
*)
6852 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
6857 /* Return the address base of the compile unit, which, if exists, is stored
6858 either at the attribute DW_AT_GNU_addr_base, or DW_AT_addr_base. */
6859 static gdb::optional
<ULONGEST
>
6860 lookup_addr_base (struct die_info
*comp_unit_die
)
6862 struct attribute
*attr
;
6863 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_addr_base
);
6864 if (attr
== nullptr)
6865 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_GNU_addr_base
);
6866 if (attr
== nullptr)
6867 return gdb::optional
<ULONGEST
> ();
6868 return DW_UNSND (attr
);
6871 /* Return range lists base of the compile unit, which, if exists, is stored
6872 either at the attribute DW_AT_rnglists_base or DW_AT_GNU_ranges_base. */
6874 lookup_ranges_base (struct die_info
*comp_unit_die
)
6876 struct attribute
*attr
;
6877 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_rnglists_base
);
6878 if (attr
== nullptr)
6879 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_GNU_ranges_base
);
6880 if (attr
== nullptr)
6882 return DW_UNSND (attr
);
6885 /* Low level DIE reading support. */
6887 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6890 init_cu_die_reader (struct die_reader_specs
*reader
,
6891 struct dwarf2_cu
*cu
,
6892 struct dwarf2_section_info
*section
,
6893 struct dwo_file
*dwo_file
,
6894 struct abbrev_table
*abbrev_table
)
6896 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6897 reader
->abfd
= section
->get_bfd_owner ();
6899 reader
->dwo_file
= dwo_file
;
6900 reader
->die_section
= section
;
6901 reader
->buffer
= section
->buffer
;
6902 reader
->buffer_end
= section
->buffer
+ section
->size
;
6903 reader
->abbrev_table
= abbrev_table
;
6906 /* Subroutine of cutu_reader to simplify it.
6907 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6908 There's just a lot of work to do, and cutu_reader is big enough
6911 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6912 from it to the DIE in the DWO. If NULL we are skipping the stub.
6913 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6914 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6915 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6916 STUB_COMP_DIR may be non-NULL.
6917 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6918 are filled in with the info of the DIE from the DWO file.
6919 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6920 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6921 kept around for at least as long as *RESULT_READER.
6923 The result is non-zero if a valid (non-dummy) DIE was found. */
6926 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6927 struct dwo_unit
*dwo_unit
,
6928 struct die_info
*stub_comp_unit_die
,
6929 const char *stub_comp_dir
,
6930 struct die_reader_specs
*result_reader
,
6931 const gdb_byte
**result_info_ptr
,
6932 struct die_info
**result_comp_unit_die
,
6933 abbrev_table_up
*result_dwo_abbrev_table
)
6935 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6936 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6937 struct dwarf2_cu
*cu
= this_cu
->cu
;
6939 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6940 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6941 int i
,num_extra_attrs
;
6942 struct dwarf2_section_info
*dwo_abbrev_section
;
6943 struct die_info
*comp_unit_die
;
6945 /* At most one of these may be provided. */
6946 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6948 /* These attributes aren't processed until later:
6949 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6950 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6951 referenced later. However, these attributes are found in the stub
6952 which we won't have later. In order to not impose this complication
6953 on the rest of the code, we read them here and copy them to the
6962 if (stub_comp_unit_die
!= NULL
)
6964 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6966 if (! this_cu
->is_debug_types
)
6967 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6968 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6969 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6970 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6971 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6973 cu
->addr_base
= lookup_addr_base (stub_comp_unit_die
);
6975 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6976 here (if needed). We need the value before we can process
6978 cu
->ranges_base
= lookup_ranges_base (stub_comp_unit_die
);
6980 else if (stub_comp_dir
!= NULL
)
6982 /* Reconstruct the comp_dir attribute to simplify the code below. */
6983 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6984 comp_dir
->name
= DW_AT_comp_dir
;
6985 comp_dir
->form
= DW_FORM_string
;
6986 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6987 DW_STRING (comp_dir
) = stub_comp_dir
;
6990 /* Set up for reading the DWO CU/TU. */
6991 cu
->dwo_unit
= dwo_unit
;
6992 dwarf2_section_info
*section
= dwo_unit
->section
;
6993 section
->read (objfile
);
6994 abfd
= section
->get_bfd_owner ();
6995 begin_info_ptr
= info_ptr
= (section
->buffer
6996 + to_underlying (dwo_unit
->sect_off
));
6997 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6999 if (this_cu
->is_debug_types
)
7001 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7003 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7004 &cu
->header
, section
,
7006 info_ptr
, rcuh_kind::TYPE
);
7007 /* This is not an assert because it can be caused by bad debug info. */
7008 if (sig_type
->signature
!= cu
->header
.signature
)
7010 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7011 " TU at offset %s [in module %s]"),
7012 hex_string (sig_type
->signature
),
7013 hex_string (cu
->header
.signature
),
7014 sect_offset_str (dwo_unit
->sect_off
),
7015 bfd_get_filename (abfd
));
7017 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7018 /* For DWOs coming from DWP files, we don't know the CU length
7019 nor the type's offset in the TU until now. */
7020 dwo_unit
->length
= get_cu_length (&cu
->header
);
7021 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7023 /* Establish the type offset that can be used to lookup the type.
7024 For DWO files, we don't know it until now. */
7025 sig_type
->type_offset_in_section
7026 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7030 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7031 &cu
->header
, section
,
7033 info_ptr
, rcuh_kind::COMPILE
);
7034 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7035 /* For DWOs coming from DWP files, we don't know the CU length
7037 dwo_unit
->length
= get_cu_length (&cu
->header
);
7040 *result_dwo_abbrev_table
7041 = abbrev_table_read_table (objfile
, dwo_abbrev_section
,
7042 cu
->header
.abbrev_sect_off
);
7043 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7044 result_dwo_abbrev_table
->get ());
7046 /* Read in the die, but leave space to copy over the attributes
7047 from the stub. This has the benefit of simplifying the rest of
7048 the code - all the work to maintain the illusion of a single
7049 DW_TAG_{compile,type}_unit DIE is done here. */
7050 num_extra_attrs
= ((stmt_list
!= NULL
)
7054 + (comp_dir
!= NULL
));
7055 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7058 /* Copy over the attributes from the stub to the DIE we just read in. */
7059 comp_unit_die
= *result_comp_unit_die
;
7060 i
= comp_unit_die
->num_attrs
;
7061 if (stmt_list
!= NULL
)
7062 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7064 comp_unit_die
->attrs
[i
++] = *low_pc
;
7065 if (high_pc
!= NULL
)
7066 comp_unit_die
->attrs
[i
++] = *high_pc
;
7068 comp_unit_die
->attrs
[i
++] = *ranges
;
7069 if (comp_dir
!= NULL
)
7070 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7071 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7073 if (dwarf_die_debug
)
7075 fprintf_unfiltered (gdb_stdlog
,
7076 "Read die from %s@0x%x of %s:\n",
7077 section
->get_name (),
7078 (unsigned) (begin_info_ptr
- section
->buffer
),
7079 bfd_get_filename (abfd
));
7080 dump_die (comp_unit_die
, dwarf_die_debug
);
7083 /* Skip dummy compilation units. */
7084 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7085 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7088 *result_info_ptr
= info_ptr
;
7092 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
7093 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
7094 signature is part of the header. */
7095 static gdb::optional
<ULONGEST
>
7096 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
7098 if (cu
->header
.version
>= 5)
7099 return cu
->header
.signature
;
7100 struct attribute
*attr
;
7101 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7102 if (attr
== nullptr)
7103 return gdb::optional
<ULONGEST
> ();
7104 return DW_UNSND (attr
);
7107 /* Subroutine of cutu_reader to simplify it.
7108 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7109 Returns NULL if the specified DWO unit cannot be found. */
7111 static struct dwo_unit
*
7112 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7113 struct die_info
*comp_unit_die
,
7114 const char *dwo_name
)
7116 struct dwarf2_cu
*cu
= this_cu
->cu
;
7117 struct dwo_unit
*dwo_unit
;
7118 const char *comp_dir
;
7120 gdb_assert (cu
!= NULL
);
7122 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7123 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7124 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7126 if (this_cu
->is_debug_types
)
7128 struct signatured_type
*sig_type
;
7130 /* Since this_cu is the first member of struct signatured_type,
7131 we can go from a pointer to one to a pointer to the other. */
7132 sig_type
= (struct signatured_type
*) this_cu
;
7133 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7137 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7138 if (!signature
.has_value ())
7139 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7141 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7142 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7149 /* Subroutine of cutu_reader to simplify it.
7150 See it for a description of the parameters.
7151 Read a TU directly from a DWO file, bypassing the stub. */
7154 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7155 int use_existing_cu
, int keep
)
7157 struct signatured_type
*sig_type
;
7158 struct die_reader_specs reader
;
7160 /* Verify we can do the following downcast, and that we have the
7162 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7163 sig_type
= (struct signatured_type
*) this_cu
;
7164 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7166 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7168 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7169 /* There's no need to do the rereading_dwo_cu handling that
7170 cutu_reader does since we don't read the stub. */
7174 /* If !use_existing_cu, this_cu->cu must be NULL. */
7175 gdb_assert (this_cu
->cu
== NULL
);
7176 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7179 /* A future optimization, if needed, would be to use an existing
7180 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7181 could share abbrev tables. */
7183 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7184 NULL
/* stub_comp_unit_die */,
7185 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7188 &m_dwo_abbrev_table
) == 0)
7195 /* Initialize a CU (or TU) and read its DIEs.
7196 If the CU defers to a DWO file, read the DWO file as well.
7198 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7199 Otherwise the table specified in the comp unit header is read in and used.
7200 This is an optimization for when we already have the abbrev table.
7202 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7203 Otherwise, a new CU is allocated with xmalloc.
7205 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7206 read_in_chain. Otherwise the dwarf2_cu data is freed at the
7209 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7210 struct abbrev_table
*abbrev_table
,
7211 int use_existing_cu
, int keep
,
7213 : die_reader_specs
{},
7214 m_this_cu (this_cu
),
7217 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7218 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7219 struct dwarf2_section_info
*section
= this_cu
->section
;
7220 bfd
*abfd
= section
->get_bfd_owner ();
7221 struct dwarf2_cu
*cu
;
7222 const gdb_byte
*begin_info_ptr
;
7223 struct signatured_type
*sig_type
= NULL
;
7224 struct dwarf2_section_info
*abbrev_section
;
7225 /* Non-zero if CU currently points to a DWO file and we need to
7226 reread it. When this happens we need to reread the skeleton die
7227 before we can reread the DWO file (this only applies to CUs, not TUs). */
7228 int rereading_dwo_cu
= 0;
7230 if (dwarf_die_debug
)
7231 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7232 this_cu
->is_debug_types
? "type" : "comp",
7233 sect_offset_str (this_cu
->sect_off
));
7235 if (use_existing_cu
)
7238 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7239 file (instead of going through the stub), short-circuit all of this. */
7240 if (this_cu
->reading_dwo_directly
)
7242 /* Narrow down the scope of possibilities to have to understand. */
7243 gdb_assert (this_cu
->is_debug_types
);
7244 gdb_assert (abbrev_table
== NULL
);
7245 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
);
7249 /* This is cheap if the section is already read in. */
7250 section
->read (objfile
);
7252 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7254 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7256 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7259 /* If this CU is from a DWO file we need to start over, we need to
7260 refetch the attributes from the skeleton CU.
7261 This could be optimized by retrieving those attributes from when we
7262 were here the first time: the previous comp_unit_die was stored in
7263 comp_unit_obstack. But there's no data yet that we need this
7265 if (cu
->dwo_unit
!= NULL
)
7266 rereading_dwo_cu
= 1;
7270 /* If !use_existing_cu, this_cu->cu must be NULL. */
7271 gdb_assert (this_cu
->cu
== NULL
);
7272 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7273 cu
= m_new_cu
.get ();
7276 /* Get the header. */
7277 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7279 /* We already have the header, there's no need to read it in again. */
7280 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7284 if (this_cu
->is_debug_types
)
7286 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7287 &cu
->header
, section
,
7288 abbrev_section
, info_ptr
,
7291 /* Since per_cu is the first member of struct signatured_type,
7292 we can go from a pointer to one to a pointer to the other. */
7293 sig_type
= (struct signatured_type
*) this_cu
;
7294 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7295 gdb_assert (sig_type
->type_offset_in_tu
7296 == cu
->header
.type_cu_offset_in_tu
);
7297 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7299 /* LENGTH has not been set yet for type units if we're
7300 using .gdb_index. */
7301 this_cu
->length
= get_cu_length (&cu
->header
);
7303 /* Establish the type offset that can be used to lookup the type. */
7304 sig_type
->type_offset_in_section
=
7305 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7307 this_cu
->dwarf_version
= cu
->header
.version
;
7311 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7312 &cu
->header
, section
,
7315 rcuh_kind::COMPILE
);
7317 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7318 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7319 this_cu
->dwarf_version
= cu
->header
.version
;
7323 /* Skip dummy compilation units. */
7324 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7325 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7331 /* If we don't have them yet, read the abbrevs for this compilation unit.
7332 And if we need to read them now, make sure they're freed when we're
7334 if (abbrev_table
!= NULL
)
7335 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7338 m_abbrev_table_holder
7339 = abbrev_table_read_table (objfile
, abbrev_section
,
7340 cu
->header
.abbrev_sect_off
);
7341 abbrev_table
= m_abbrev_table_holder
.get ();
7344 /* Read the top level CU/TU die. */
7345 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7346 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7348 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7354 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7355 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7356 table from the DWO file and pass the ownership over to us. It will be
7357 referenced from READER, so we must make sure to free it after we're done
7360 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7361 DWO CU, that this test will fail (the attribute will not be present). */
7362 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7363 if (dwo_name
!= nullptr)
7365 struct dwo_unit
*dwo_unit
;
7366 struct die_info
*dwo_comp_unit_die
;
7368 if (comp_unit_die
->has_children
)
7370 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7371 " has children (offset %s) [in module %s]"),
7372 sect_offset_str (this_cu
->sect_off
),
7373 bfd_get_filename (abfd
));
7375 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
7376 if (dwo_unit
!= NULL
)
7378 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7379 comp_unit_die
, NULL
,
7382 &m_dwo_abbrev_table
) == 0)
7388 comp_unit_die
= dwo_comp_unit_die
;
7392 /* Yikes, we couldn't find the rest of the DIE, we only have
7393 the stub. A complaint has already been logged. There's
7394 not much more we can do except pass on the stub DIE to
7395 die_reader_func. We don't want to throw an error on bad
7401 cutu_reader::~cutu_reader ()
7403 /* Done, clean up. */
7404 if (m_new_cu
!= NULL
&& m_keep
&& !dummy_p
)
7406 struct dwarf2_per_objfile
*dwarf2_per_objfile
7407 = m_this_cu
->dwarf2_per_objfile
;
7408 /* Link this CU into read_in_chain. */
7409 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7410 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7411 /* The chain owns it now. */
7412 m_new_cu
.release ();
7416 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7417 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7418 assumed to have already done the lookup to find the DWO file).
7420 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7421 THIS_CU->is_debug_types, but nothing else.
7423 We fill in THIS_CU->length.
7425 THIS_CU->cu is always freed when done.
7426 This is done in order to not leave THIS_CU->cu in a state where we have
7427 to care whether it refers to the "main" CU or the DWO CU.
7429 When parent_cu is passed, it is used to provide a default value for
7430 str_offsets_base and addr_base from the parent. */
7432 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7433 struct dwarf2_cu
*parent_cu
,
7434 struct dwo_file
*dwo_file
)
7435 : die_reader_specs
{},
7438 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7439 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7440 struct dwarf2_section_info
*section
= this_cu
->section
;
7441 bfd
*abfd
= section
->get_bfd_owner ();
7442 struct dwarf2_section_info
*abbrev_section
;
7443 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7445 if (dwarf_die_debug
)
7446 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7447 this_cu
->is_debug_types
? "type" : "comp",
7448 sect_offset_str (this_cu
->sect_off
));
7450 gdb_assert (this_cu
->cu
== NULL
);
7452 abbrev_section
= (dwo_file
!= NULL
7453 ? &dwo_file
->sections
.abbrev
7454 : get_abbrev_section_for_cu (this_cu
));
7456 /* This is cheap if the section is already read in. */
7457 section
->read (objfile
);
7459 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7461 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7462 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7463 &m_new_cu
->header
, section
,
7464 abbrev_section
, info_ptr
,
7465 (this_cu
->is_debug_types
7467 : rcuh_kind::COMPILE
));
7469 if (parent_cu
!= nullptr)
7471 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7472 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7474 this_cu
->length
= get_cu_length (&m_new_cu
->header
);
7476 /* Skip dummy compilation units. */
7477 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7478 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7484 m_abbrev_table_holder
7485 = abbrev_table_read_table (objfile
, abbrev_section
,
7486 m_new_cu
->header
.abbrev_sect_off
);
7488 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7489 m_abbrev_table_holder
.get ());
7490 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7494 /* Type Unit Groups.
7496 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7497 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7498 so that all types coming from the same compilation (.o file) are grouped
7499 together. A future step could be to put the types in the same symtab as
7500 the CU the types ultimately came from. */
7503 hash_type_unit_group (const void *item
)
7505 const struct type_unit_group
*tu_group
7506 = (const struct type_unit_group
*) item
;
7508 return hash_stmt_list_entry (&tu_group
->hash
);
7512 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7514 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7515 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7517 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7520 /* Allocate a hash table for type unit groups. */
7523 allocate_type_unit_groups_table (struct objfile
*objfile
)
7525 return htab_create_alloc_ex (3,
7526 hash_type_unit_group
,
7529 &objfile
->objfile_obstack
,
7530 hashtab_obstack_allocate
,
7531 dummy_obstack_deallocate
);
7534 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7535 partial symtabs. We combine several TUs per psymtab to not let the size
7536 of any one psymtab grow too big. */
7537 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7538 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7540 /* Helper routine for get_type_unit_group.
7541 Create the type_unit_group object used to hold one or more TUs. */
7543 static struct type_unit_group
*
7544 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7546 struct dwarf2_per_objfile
*dwarf2_per_objfile
7547 = cu
->per_cu
->dwarf2_per_objfile
;
7548 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7549 struct dwarf2_per_cu_data
*per_cu
;
7550 struct type_unit_group
*tu_group
;
7552 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7553 struct type_unit_group
);
7554 per_cu
= &tu_group
->per_cu
;
7555 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7557 if (dwarf2_per_objfile
->using_index
)
7559 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7560 struct dwarf2_per_cu_quick_data
);
7564 unsigned int line_offset
= to_underlying (line_offset_struct
);
7565 dwarf2_psymtab
*pst
;
7568 /* Give the symtab a useful name for debug purposes. */
7569 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7570 name
= string_printf ("<type_units_%d>",
7571 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7573 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7575 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7576 pst
->anonymous
= true;
7579 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7580 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7585 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7586 STMT_LIST is a DW_AT_stmt_list attribute. */
7588 static struct type_unit_group
*
7589 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7591 struct dwarf2_per_objfile
*dwarf2_per_objfile
7592 = cu
->per_cu
->dwarf2_per_objfile
;
7593 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7594 struct type_unit_group
*tu_group
;
7596 unsigned int line_offset
;
7597 struct type_unit_group type_unit_group_for_lookup
;
7599 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7601 dwarf2_per_objfile
->type_unit_groups
=
7602 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7605 /* Do we need to create a new group, or can we use an existing one? */
7609 line_offset
= DW_UNSND (stmt_list
);
7610 ++tu_stats
->nr_symtab_sharers
;
7614 /* Ugh, no stmt_list. Rare, but we have to handle it.
7615 We can do various things here like create one group per TU or
7616 spread them over multiple groups to split up the expansion work.
7617 To avoid worst case scenarios (too many groups or too large groups)
7618 we, umm, group them in bunches. */
7619 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7620 | (tu_stats
->nr_stmt_less_type_units
7621 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7622 ++tu_stats
->nr_stmt_less_type_units
;
7625 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7626 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7627 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7628 &type_unit_group_for_lookup
, INSERT
);
7631 tu_group
= (struct type_unit_group
*) *slot
;
7632 gdb_assert (tu_group
!= NULL
);
7636 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7637 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7639 ++tu_stats
->nr_symtabs
;
7645 /* Partial symbol tables. */
7647 /* Create a psymtab named NAME and assign it to PER_CU.
7649 The caller must fill in the following details:
7650 dirname, textlow, texthigh. */
7652 static dwarf2_psymtab
*
7653 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7655 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7656 dwarf2_psymtab
*pst
;
7658 pst
= new dwarf2_psymtab (name
, objfile
, 0);
7660 pst
->psymtabs_addrmap_supported
= true;
7662 /* This is the glue that links PST into GDB's symbol API. */
7663 pst
->per_cu_data
= per_cu
;
7664 per_cu
->v
.psymtab
= pst
;
7669 /* DIE reader function for process_psymtab_comp_unit. */
7672 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7673 const gdb_byte
*info_ptr
,
7674 struct die_info
*comp_unit_die
,
7675 int want_partial_unit
,
7676 enum language pretend_language
)
7678 struct dwarf2_cu
*cu
= reader
->cu
;
7679 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7680 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7681 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7683 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7684 dwarf2_psymtab
*pst
;
7685 enum pc_bounds_kind cu_bounds_kind
;
7686 const char *filename
;
7688 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !want_partial_unit
)
7691 gdb_assert (! per_cu
->is_debug_types
);
7693 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7695 /* Allocate a new partial symbol table structure. */
7696 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7697 if (filename
== NULL
)
7700 pst
= create_partial_symtab (per_cu
, filename
);
7702 /* This must be done before calling dwarf2_build_include_psymtabs. */
7703 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7705 baseaddr
= objfile
->text_section_offset ();
7707 dwarf2_find_base_address (comp_unit_die
, cu
);
7709 /* Possibly set the default values of LOWPC and HIGHPC from
7711 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7712 &best_highpc
, cu
, pst
);
7713 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7716 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7719 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7721 /* Store the contiguous range if it is not empty; it can be
7722 empty for CUs with no code. */
7723 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7727 /* Check if comp unit has_children.
7728 If so, read the rest of the partial symbols from this comp unit.
7729 If not, there's no more debug_info for this comp unit. */
7730 if (comp_unit_die
->has_children
)
7732 struct partial_die_info
*first_die
;
7733 CORE_ADDR lowpc
, highpc
;
7735 lowpc
= ((CORE_ADDR
) -1);
7736 highpc
= ((CORE_ADDR
) 0);
7738 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7740 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7741 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7743 /* If we didn't find a lowpc, set it to highpc to avoid
7744 complaints from `maint check'. */
7745 if (lowpc
== ((CORE_ADDR
) -1))
7748 /* If the compilation unit didn't have an explicit address range,
7749 then use the information extracted from its child dies. */
7750 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7753 best_highpc
= highpc
;
7756 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7757 best_lowpc
+ baseaddr
)
7759 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7760 best_highpc
+ baseaddr
)
7763 end_psymtab_common (objfile
, pst
);
7765 if (!cu
->per_cu
->imported_symtabs_empty ())
7768 int len
= cu
->per_cu
->imported_symtabs_size ();
7770 /* Fill in 'dependencies' here; we fill in 'users' in a
7772 pst
->number_of_dependencies
= len
;
7774 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7775 for (i
= 0; i
< len
; ++i
)
7777 pst
->dependencies
[i
]
7778 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7781 cu
->per_cu
->imported_symtabs_free ();
7784 /* Get the list of files included in the current compilation unit,
7785 and build a psymtab for each of them. */
7786 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7788 if (dwarf_read_debug
)
7789 fprintf_unfiltered (gdb_stdlog
,
7790 "Psymtab for %s unit @%s: %s - %s"
7791 ", %d global, %d static syms\n",
7792 per_cu
->is_debug_types
? "type" : "comp",
7793 sect_offset_str (per_cu
->sect_off
),
7794 paddress (gdbarch
, pst
->text_low (objfile
)),
7795 paddress (gdbarch
, pst
->text_high (objfile
)),
7796 pst
->n_global_syms
, pst
->n_static_syms
);
7799 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7800 Process compilation unit THIS_CU for a psymtab. */
7803 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7804 int want_partial_unit
,
7805 enum language pretend_language
)
7807 /* If this compilation unit was already read in, free the
7808 cached copy in order to read it in again. This is
7809 necessary because we skipped some symbols when we first
7810 read in the compilation unit (see load_partial_dies).
7811 This problem could be avoided, but the benefit is unclear. */
7812 if (this_cu
->cu
!= NULL
)
7813 free_one_cached_comp_unit (this_cu
);
7815 cutu_reader
reader (this_cu
, NULL
, 0, 0, false);
7821 else if (this_cu
->is_debug_types
)
7822 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7823 reader
.comp_unit_die
);
7825 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7826 reader
.comp_unit_die
,
7830 /* Age out any secondary CUs. */
7831 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7834 /* Reader function for build_type_psymtabs. */
7837 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7838 const gdb_byte
*info_ptr
,
7839 struct die_info
*type_unit_die
)
7841 struct dwarf2_per_objfile
*dwarf2_per_objfile
7842 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7843 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7844 struct dwarf2_cu
*cu
= reader
->cu
;
7845 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7846 struct signatured_type
*sig_type
;
7847 struct type_unit_group
*tu_group
;
7848 struct attribute
*attr
;
7849 struct partial_die_info
*first_die
;
7850 CORE_ADDR lowpc
, highpc
;
7851 dwarf2_psymtab
*pst
;
7853 gdb_assert (per_cu
->is_debug_types
);
7854 sig_type
= (struct signatured_type
*) per_cu
;
7856 if (! type_unit_die
->has_children
)
7859 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
7860 tu_group
= get_type_unit_group (cu
, attr
);
7862 if (tu_group
->tus
== nullptr)
7863 tu_group
->tus
= new std::vector
<signatured_type
*>;
7864 tu_group
->tus
->push_back (sig_type
);
7866 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7867 pst
= create_partial_symtab (per_cu
, "");
7868 pst
->anonymous
= true;
7870 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7872 lowpc
= (CORE_ADDR
) -1;
7873 highpc
= (CORE_ADDR
) 0;
7874 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7876 end_psymtab_common (objfile
, pst
);
7879 /* Struct used to sort TUs by their abbreviation table offset. */
7881 struct tu_abbrev_offset
7883 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7884 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7887 signatured_type
*sig_type
;
7888 sect_offset abbrev_offset
;
7891 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7894 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7895 const struct tu_abbrev_offset
&b
)
7897 return a
.abbrev_offset
< b
.abbrev_offset
;
7900 /* Efficiently read all the type units.
7901 This does the bulk of the work for build_type_psymtabs.
7903 The efficiency is because we sort TUs by the abbrev table they use and
7904 only read each abbrev table once. In one program there are 200K TUs
7905 sharing 8K abbrev tables.
7907 The main purpose of this function is to support building the
7908 dwarf2_per_objfile->type_unit_groups table.
7909 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7910 can collapse the search space by grouping them by stmt_list.
7911 The savings can be significant, in the same program from above the 200K TUs
7912 share 8K stmt_list tables.
7914 FUNC is expected to call get_type_unit_group, which will create the
7915 struct type_unit_group if necessary and add it to
7916 dwarf2_per_objfile->type_unit_groups. */
7919 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7921 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7922 abbrev_table_up abbrev_table
;
7923 sect_offset abbrev_offset
;
7925 /* It's up to the caller to not call us multiple times. */
7926 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7928 if (dwarf2_per_objfile
->all_type_units
.empty ())
7931 /* TUs typically share abbrev tables, and there can be way more TUs than
7932 abbrev tables. Sort by abbrev table to reduce the number of times we
7933 read each abbrev table in.
7934 Alternatives are to punt or to maintain a cache of abbrev tables.
7935 This is simpler and efficient enough for now.
7937 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7938 symtab to use). Typically TUs with the same abbrev offset have the same
7939 stmt_list value too so in practice this should work well.
7941 The basic algorithm here is:
7943 sort TUs by abbrev table
7944 for each TU with same abbrev table:
7945 read abbrev table if first user
7946 read TU top level DIE
7947 [IWBN if DWO skeletons had DW_AT_stmt_list]
7950 if (dwarf_read_debug
)
7951 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7953 /* Sort in a separate table to maintain the order of all_type_units
7954 for .gdb_index: TU indices directly index all_type_units. */
7955 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7956 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7958 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7959 sorted_by_abbrev
.emplace_back
7960 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7961 sig_type
->per_cu
.section
,
7962 sig_type
->per_cu
.sect_off
));
7964 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7965 sort_tu_by_abbrev_offset
);
7967 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7969 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7971 /* Switch to the next abbrev table if necessary. */
7972 if (abbrev_table
== NULL
7973 || tu
.abbrev_offset
!= abbrev_offset
)
7975 abbrev_offset
= tu
.abbrev_offset
;
7977 abbrev_table_read_table (dwarf2_per_objfile
->objfile
,
7978 &dwarf2_per_objfile
->abbrev
,
7980 ++tu_stats
->nr_uniq_abbrev_tables
;
7983 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7985 if (!reader
.dummy_p
)
7986 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7987 reader
.comp_unit_die
);
7991 /* Print collected type unit statistics. */
7994 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7996 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7998 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7999 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8000 dwarf2_per_objfile
->all_type_units
.size ());
8001 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8002 tu_stats
->nr_uniq_abbrev_tables
);
8003 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8004 tu_stats
->nr_symtabs
);
8005 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8006 tu_stats
->nr_symtab_sharers
);
8007 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8008 tu_stats
->nr_stmt_less_type_units
);
8009 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8010 tu_stats
->nr_all_type_units_reallocs
);
8013 /* Traversal function for build_type_psymtabs. */
8016 build_type_psymtab_dependencies (void **slot
, void *info
)
8018 struct dwarf2_per_objfile
*dwarf2_per_objfile
8019 = (struct dwarf2_per_objfile
*) info
;
8020 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8021 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8022 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8023 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8024 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
8027 gdb_assert (len
> 0);
8028 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8030 pst
->number_of_dependencies
= len
;
8031 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8032 for (i
= 0; i
< len
; ++i
)
8034 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
8035 gdb_assert (iter
->per_cu
.is_debug_types
);
8036 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8037 iter
->type_unit_group
= tu_group
;
8040 delete tu_group
->tus
;
8041 tu_group
->tus
= nullptr;
8046 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8047 Build partial symbol tables for the .debug_types comp-units. */
8050 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8052 if (! create_all_type_units (dwarf2_per_objfile
))
8055 build_type_psymtabs_1 (dwarf2_per_objfile
);
8058 /* Traversal function for process_skeletonless_type_unit.
8059 Read a TU in a DWO file and build partial symbols for it. */
8062 process_skeletonless_type_unit (void **slot
, void *info
)
8064 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8065 struct dwarf2_per_objfile
*dwarf2_per_objfile
8066 = (struct dwarf2_per_objfile
*) info
;
8067 struct signatured_type find_entry
, *entry
;
8069 /* If this TU doesn't exist in the global table, add it and read it in. */
8071 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8073 dwarf2_per_objfile
->signatured_types
8074 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8077 find_entry
.signature
= dwo_unit
->signature
;
8078 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8080 /* If we've already seen this type there's nothing to do. What's happening
8081 is we're doing our own version of comdat-folding here. */
8085 /* This does the job that create_all_type_units would have done for
8087 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8088 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8091 /* This does the job that build_type_psymtabs_1 would have done. */
8092 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, 0, false);
8093 if (!reader
.dummy_p
)
8094 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
8095 reader
.comp_unit_die
);
8100 /* Traversal function for process_skeletonless_type_units. */
8103 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8105 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8107 if (dwo_file
->tus
!= NULL
)
8109 htab_traverse_noresize (dwo_file
->tus
,
8110 process_skeletonless_type_unit
, info
);
8116 /* Scan all TUs of DWO files, verifying we've processed them.
8117 This is needed in case a TU was emitted without its skeleton.
8118 Note: This can't be done until we know what all the DWO files are. */
8121 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8123 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8124 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8125 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8127 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
8128 process_dwo_file_for_skeletonless_type_units
,
8129 dwarf2_per_objfile
);
8133 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8136 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8138 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8140 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8145 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8147 /* Set the 'user' field only if it is not already set. */
8148 if (pst
->dependencies
[j
]->user
== NULL
)
8149 pst
->dependencies
[j
]->user
= pst
;
8154 /* Build the partial symbol table by doing a quick pass through the
8155 .debug_info and .debug_abbrev sections. */
8158 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8160 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8162 if (dwarf_read_debug
)
8164 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8165 objfile_name (objfile
));
8168 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8170 dwarf2_per_objfile
->info
.read (objfile
);
8172 /* Any cached compilation units will be linked by the per-objfile
8173 read_in_chain. Make sure to free them when we're done. */
8174 free_cached_comp_units
freer (dwarf2_per_objfile
);
8176 build_type_psymtabs (dwarf2_per_objfile
);
8178 create_all_comp_units (dwarf2_per_objfile
);
8180 /* Create a temporary address map on a temporary obstack. We later
8181 copy this to the final obstack. */
8182 auto_obstack temp_obstack
;
8184 scoped_restore save_psymtabs_addrmap
8185 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8186 addrmap_create_mutable (&temp_obstack
));
8188 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8189 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8191 /* This has to wait until we read the CUs, we need the list of DWOs. */
8192 process_skeletonless_type_units (dwarf2_per_objfile
);
8194 /* Now that all TUs have been processed we can fill in the dependencies. */
8195 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8197 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8198 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8201 if (dwarf_read_debug
)
8202 print_tu_stats (dwarf2_per_objfile
);
8204 set_partial_user (dwarf2_per_objfile
);
8206 objfile
->partial_symtabs
->psymtabs_addrmap
8207 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8208 objfile
->partial_symtabs
->obstack ());
8209 /* At this point we want to keep the address map. */
8210 save_psymtabs_addrmap
.release ();
8212 if (dwarf_read_debug
)
8213 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8214 objfile_name (objfile
));
8217 /* Load the partial DIEs for a secondary CU into memory.
8218 This is also used when rereading a primary CU with load_all_dies. */
8221 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8223 cutu_reader
reader (this_cu
, NULL
, 1, 1, false);
8225 if (!reader
.dummy_p
)
8227 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
8230 /* Check if comp unit has_children.
8231 If so, read the rest of the partial symbols from this comp unit.
8232 If not, there's no more debug_info for this comp unit. */
8233 if (reader
.comp_unit_die
->has_children
)
8234 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8239 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8240 struct dwarf2_section_info
*section
,
8241 struct dwarf2_section_info
*abbrev_section
,
8242 unsigned int is_dwz
)
8244 const gdb_byte
*info_ptr
;
8245 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8247 if (dwarf_read_debug
)
8248 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8249 section
->get_name (),
8250 section
->get_file_name ());
8252 section
->read (objfile
);
8254 info_ptr
= section
->buffer
;
8256 while (info_ptr
< section
->buffer
+ section
->size
)
8258 struct dwarf2_per_cu_data
*this_cu
;
8260 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8262 comp_unit_head cu_header
;
8263 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8264 abbrev_section
, info_ptr
,
8265 rcuh_kind::COMPILE
);
8267 /* Save the compilation unit for later lookup. */
8268 if (cu_header
.unit_type
!= DW_UT_type
)
8270 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8271 struct dwarf2_per_cu_data
);
8272 memset (this_cu
, 0, sizeof (*this_cu
));
8276 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8277 struct signatured_type
);
8278 memset (sig_type
, 0, sizeof (*sig_type
));
8279 sig_type
->signature
= cu_header
.signature
;
8280 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8281 this_cu
= &sig_type
->per_cu
;
8283 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8284 this_cu
->sect_off
= sect_off
;
8285 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8286 this_cu
->is_dwz
= is_dwz
;
8287 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8288 this_cu
->section
= section
;
8290 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8292 info_ptr
= info_ptr
+ this_cu
->length
;
8296 /* Create a list of all compilation units in OBJFILE.
8297 This is only done for -readnow and building partial symtabs. */
8300 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8302 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8303 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8304 &dwarf2_per_objfile
->abbrev
, 0);
8306 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8308 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8312 /* Process all loaded DIEs for compilation unit CU, starting at
8313 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8314 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8315 DW_AT_ranges). See the comments of add_partial_subprogram on how
8316 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8319 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8320 CORE_ADDR
*highpc
, int set_addrmap
,
8321 struct dwarf2_cu
*cu
)
8323 struct partial_die_info
*pdi
;
8325 /* Now, march along the PDI's, descending into ones which have
8326 interesting children but skipping the children of the other ones,
8327 until we reach the end of the compilation unit. */
8335 /* Anonymous namespaces or modules have no name but have interesting
8336 children, so we need to look at them. Ditto for anonymous
8339 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8340 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8341 || pdi
->tag
== DW_TAG_imported_unit
8342 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8346 case DW_TAG_subprogram
:
8347 case DW_TAG_inlined_subroutine
:
8348 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8350 case DW_TAG_constant
:
8351 case DW_TAG_variable
:
8352 case DW_TAG_typedef
:
8353 case DW_TAG_union_type
:
8354 if (!pdi
->is_declaration
)
8356 add_partial_symbol (pdi
, cu
);
8359 case DW_TAG_class_type
:
8360 case DW_TAG_interface_type
:
8361 case DW_TAG_structure_type
:
8362 if (!pdi
->is_declaration
)
8364 add_partial_symbol (pdi
, cu
);
8366 if ((cu
->language
== language_rust
8367 || cu
->language
== language_cplus
) && pdi
->has_children
)
8368 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8371 case DW_TAG_enumeration_type
:
8372 if (!pdi
->is_declaration
)
8373 add_partial_enumeration (pdi
, cu
);
8375 case DW_TAG_base_type
:
8376 case DW_TAG_subrange_type
:
8377 /* File scope base type definitions are added to the partial
8379 add_partial_symbol (pdi
, cu
);
8381 case DW_TAG_namespace
:
8382 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8385 if (!pdi
->is_declaration
)
8386 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8388 case DW_TAG_imported_unit
:
8390 struct dwarf2_per_cu_data
*per_cu
;
8392 /* For now we don't handle imported units in type units. */
8393 if (cu
->per_cu
->is_debug_types
)
8395 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8396 " supported in type units [in module %s]"),
8397 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8400 per_cu
= dwarf2_find_containing_comp_unit
8401 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8402 cu
->per_cu
->dwarf2_per_objfile
);
8404 /* Go read the partial unit, if needed. */
8405 if (per_cu
->v
.psymtab
== NULL
)
8406 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8408 cu
->per_cu
->imported_symtabs_push (per_cu
);
8411 case DW_TAG_imported_declaration
:
8412 add_partial_symbol (pdi
, cu
);
8419 /* If the die has a sibling, skip to the sibling. */
8421 pdi
= pdi
->die_sibling
;
8425 /* Functions used to compute the fully scoped name of a partial DIE.
8427 Normally, this is simple. For C++, the parent DIE's fully scoped
8428 name is concatenated with "::" and the partial DIE's name.
8429 Enumerators are an exception; they use the scope of their parent
8430 enumeration type, i.e. the name of the enumeration type is not
8431 prepended to the enumerator.
8433 There are two complexities. One is DW_AT_specification; in this
8434 case "parent" means the parent of the target of the specification,
8435 instead of the direct parent of the DIE. The other is compilers
8436 which do not emit DW_TAG_namespace; in this case we try to guess
8437 the fully qualified name of structure types from their members'
8438 linkage names. This must be done using the DIE's children rather
8439 than the children of any DW_AT_specification target. We only need
8440 to do this for structures at the top level, i.e. if the target of
8441 any DW_AT_specification (if any; otherwise the DIE itself) does not
8444 /* Compute the scope prefix associated with PDI's parent, in
8445 compilation unit CU. The result will be allocated on CU's
8446 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8447 field. NULL is returned if no prefix is necessary. */
8449 partial_die_parent_scope (struct partial_die_info
*pdi
,
8450 struct dwarf2_cu
*cu
)
8452 const char *grandparent_scope
;
8453 struct partial_die_info
*parent
, *real_pdi
;
8455 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8456 then this means the parent of the specification DIE. */
8459 while (real_pdi
->has_specification
)
8461 auto res
= find_partial_die (real_pdi
->spec_offset
,
8462 real_pdi
->spec_is_dwz
, cu
);
8467 parent
= real_pdi
->die_parent
;
8471 if (parent
->scope_set
)
8472 return parent
->scope
;
8476 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8478 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8479 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8480 Work around this problem here. */
8481 if (cu
->language
== language_cplus
8482 && parent
->tag
== DW_TAG_namespace
8483 && strcmp (parent
->name
, "::") == 0
8484 && grandparent_scope
== NULL
)
8486 parent
->scope
= NULL
;
8487 parent
->scope_set
= 1;
8491 /* Nested subroutines in Fortran get a prefix. */
8492 if (pdi
->tag
== DW_TAG_enumerator
)
8493 /* Enumerators should not get the name of the enumeration as a prefix. */
8494 parent
->scope
= grandparent_scope
;
8495 else if (parent
->tag
== DW_TAG_namespace
8496 || parent
->tag
== DW_TAG_module
8497 || parent
->tag
== DW_TAG_structure_type
8498 || parent
->tag
== DW_TAG_class_type
8499 || parent
->tag
== DW_TAG_interface_type
8500 || parent
->tag
== DW_TAG_union_type
8501 || parent
->tag
== DW_TAG_enumeration_type
8502 || (cu
->language
== language_fortran
8503 && parent
->tag
== DW_TAG_subprogram
8504 && pdi
->tag
== DW_TAG_subprogram
))
8506 if (grandparent_scope
== NULL
)
8507 parent
->scope
= parent
->name
;
8509 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8511 parent
->name
, 0, cu
);
8515 /* FIXME drow/2004-04-01: What should we be doing with
8516 function-local names? For partial symbols, we should probably be
8518 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8519 dwarf_tag_name (parent
->tag
),
8520 sect_offset_str (pdi
->sect_off
));
8521 parent
->scope
= grandparent_scope
;
8524 parent
->scope_set
= 1;
8525 return parent
->scope
;
8528 /* Return the fully scoped name associated with PDI, from compilation unit
8529 CU. The result will be allocated with malloc. */
8531 static gdb::unique_xmalloc_ptr
<char>
8532 partial_die_full_name (struct partial_die_info
*pdi
,
8533 struct dwarf2_cu
*cu
)
8535 const char *parent_scope
;
8537 /* If this is a template instantiation, we can not work out the
8538 template arguments from partial DIEs. So, unfortunately, we have
8539 to go through the full DIEs. At least any work we do building
8540 types here will be reused if full symbols are loaded later. */
8541 if (pdi
->has_template_arguments
)
8545 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8547 struct die_info
*die
;
8548 struct attribute attr
;
8549 struct dwarf2_cu
*ref_cu
= cu
;
8551 /* DW_FORM_ref_addr is using section offset. */
8552 attr
.name
= (enum dwarf_attribute
) 0;
8553 attr
.form
= DW_FORM_ref_addr
;
8554 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8555 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8557 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8561 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8562 if (parent_scope
== NULL
)
8565 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8570 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8572 struct dwarf2_per_objfile
*dwarf2_per_objfile
8573 = cu
->per_cu
->dwarf2_per_objfile
;
8574 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8575 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8577 const char *actual_name
= NULL
;
8580 baseaddr
= objfile
->text_section_offset ();
8582 gdb::unique_xmalloc_ptr
<char> built_actual_name
8583 = partial_die_full_name (pdi
, cu
);
8584 if (built_actual_name
!= NULL
)
8585 actual_name
= built_actual_name
.get ();
8587 if (actual_name
== NULL
)
8588 actual_name
= pdi
->name
;
8592 case DW_TAG_inlined_subroutine
:
8593 case DW_TAG_subprogram
:
8594 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8596 if (pdi
->is_external
8597 || cu
->language
== language_ada
8598 || (cu
->language
== language_fortran
8599 && pdi
->die_parent
!= NULL
8600 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8602 /* Normally, only "external" DIEs are part of the global scope.
8603 But in Ada and Fortran, we want to be able to access nested
8604 procedures globally. So all Ada and Fortran subprograms are
8605 stored in the global scope. */
8606 add_psymbol_to_list (actual_name
,
8607 built_actual_name
!= NULL
,
8608 VAR_DOMAIN
, LOC_BLOCK
,
8609 SECT_OFF_TEXT (objfile
),
8610 psymbol_placement::GLOBAL
,
8612 cu
->language
, objfile
);
8616 add_psymbol_to_list (actual_name
,
8617 built_actual_name
!= NULL
,
8618 VAR_DOMAIN
, LOC_BLOCK
,
8619 SECT_OFF_TEXT (objfile
),
8620 psymbol_placement::STATIC
,
8621 addr
, cu
->language
, objfile
);
8624 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8625 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8627 case DW_TAG_constant
:
8628 add_psymbol_to_list (actual_name
,
8629 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8630 -1, (pdi
->is_external
8631 ? psymbol_placement::GLOBAL
8632 : psymbol_placement::STATIC
),
8633 0, cu
->language
, objfile
);
8635 case DW_TAG_variable
:
8637 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8641 && !dwarf2_per_objfile
->has_section_at_zero
)
8643 /* A global or static variable may also have been stripped
8644 out by the linker if unused, in which case its address
8645 will be nullified; do not add such variables into partial
8646 symbol table then. */
8648 else if (pdi
->is_external
)
8651 Don't enter into the minimal symbol tables as there is
8652 a minimal symbol table entry from the ELF symbols already.
8653 Enter into partial symbol table if it has a location
8654 descriptor or a type.
8655 If the location descriptor is missing, new_symbol will create
8656 a LOC_UNRESOLVED symbol, the address of the variable will then
8657 be determined from the minimal symbol table whenever the variable
8659 The address for the partial symbol table entry is not
8660 used by GDB, but it comes in handy for debugging partial symbol
8663 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8664 add_psymbol_to_list (actual_name
,
8665 built_actual_name
!= NULL
,
8666 VAR_DOMAIN
, LOC_STATIC
,
8667 SECT_OFF_TEXT (objfile
),
8668 psymbol_placement::GLOBAL
,
8669 addr
, cu
->language
, objfile
);
8673 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8675 /* Static Variable. Skip symbols whose value we cannot know (those
8676 without location descriptors or constant values). */
8677 if (!has_loc
&& !pdi
->has_const_value
)
8680 add_psymbol_to_list (actual_name
,
8681 built_actual_name
!= NULL
,
8682 VAR_DOMAIN
, LOC_STATIC
,
8683 SECT_OFF_TEXT (objfile
),
8684 psymbol_placement::STATIC
,
8686 cu
->language
, objfile
);
8689 case DW_TAG_typedef
:
8690 case DW_TAG_base_type
:
8691 case DW_TAG_subrange_type
:
8692 add_psymbol_to_list (actual_name
,
8693 built_actual_name
!= NULL
,
8694 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8695 psymbol_placement::STATIC
,
8696 0, cu
->language
, objfile
);
8698 case DW_TAG_imported_declaration
:
8699 case DW_TAG_namespace
:
8700 add_psymbol_to_list (actual_name
,
8701 built_actual_name
!= NULL
,
8702 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8703 psymbol_placement::GLOBAL
,
8704 0, cu
->language
, objfile
);
8707 /* With Fortran 77 there might be a "BLOCK DATA" module
8708 available without any name. If so, we skip the module as it
8709 doesn't bring any value. */
8710 if (actual_name
!= nullptr)
8711 add_psymbol_to_list (actual_name
,
8712 built_actual_name
!= NULL
,
8713 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8714 psymbol_placement::GLOBAL
,
8715 0, cu
->language
, objfile
);
8717 case DW_TAG_class_type
:
8718 case DW_TAG_interface_type
:
8719 case DW_TAG_structure_type
:
8720 case DW_TAG_union_type
:
8721 case DW_TAG_enumeration_type
:
8722 /* Skip external references. The DWARF standard says in the section
8723 about "Structure, Union, and Class Type Entries": "An incomplete
8724 structure, union or class type is represented by a structure,
8725 union or class entry that does not have a byte size attribute
8726 and that has a DW_AT_declaration attribute." */
8727 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8730 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8731 static vs. global. */
8732 add_psymbol_to_list (actual_name
,
8733 built_actual_name
!= NULL
,
8734 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
8735 cu
->language
== language_cplus
8736 ? psymbol_placement::GLOBAL
8737 : psymbol_placement::STATIC
,
8738 0, cu
->language
, objfile
);
8741 case DW_TAG_enumerator
:
8742 add_psymbol_to_list (actual_name
,
8743 built_actual_name
!= NULL
,
8744 VAR_DOMAIN
, LOC_CONST
, -1,
8745 cu
->language
== language_cplus
8746 ? psymbol_placement::GLOBAL
8747 : psymbol_placement::STATIC
,
8748 0, cu
->language
, objfile
);
8755 /* Read a partial die corresponding to a namespace; also, add a symbol
8756 corresponding to that namespace to the symbol table. NAMESPACE is
8757 the name of the enclosing namespace. */
8760 add_partial_namespace (struct partial_die_info
*pdi
,
8761 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8762 int set_addrmap
, struct dwarf2_cu
*cu
)
8764 /* Add a symbol for the namespace. */
8766 add_partial_symbol (pdi
, cu
);
8768 /* Now scan partial symbols in that namespace. */
8770 if (pdi
->has_children
)
8771 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8774 /* Read a partial die corresponding to a Fortran module. */
8777 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8778 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8780 /* Add a symbol for the namespace. */
8782 add_partial_symbol (pdi
, cu
);
8784 /* Now scan partial symbols in that module. */
8786 if (pdi
->has_children
)
8787 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8790 /* Read a partial die corresponding to a subprogram or an inlined
8791 subprogram and create a partial symbol for that subprogram.
8792 When the CU language allows it, this routine also defines a partial
8793 symbol for each nested subprogram that this subprogram contains.
8794 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8795 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8797 PDI may also be a lexical block, in which case we simply search
8798 recursively for subprograms defined inside that lexical block.
8799 Again, this is only performed when the CU language allows this
8800 type of definitions. */
8803 add_partial_subprogram (struct partial_die_info
*pdi
,
8804 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8805 int set_addrmap
, struct dwarf2_cu
*cu
)
8807 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8809 if (pdi
->has_pc_info
)
8811 if (pdi
->lowpc
< *lowpc
)
8812 *lowpc
= pdi
->lowpc
;
8813 if (pdi
->highpc
> *highpc
)
8814 *highpc
= pdi
->highpc
;
8817 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8818 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8820 CORE_ADDR this_highpc
;
8821 CORE_ADDR this_lowpc
;
8823 baseaddr
= objfile
->text_section_offset ();
8825 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8826 pdi
->lowpc
+ baseaddr
)
8829 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8830 pdi
->highpc
+ baseaddr
)
8832 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8833 this_lowpc
, this_highpc
- 1,
8834 cu
->per_cu
->v
.psymtab
);
8838 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8840 if (!pdi
->is_declaration
)
8841 /* Ignore subprogram DIEs that do not have a name, they are
8842 illegal. Do not emit a complaint at this point, we will
8843 do so when we convert this psymtab into a symtab. */
8845 add_partial_symbol (pdi
, cu
);
8849 if (! pdi
->has_children
)
8852 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8854 pdi
= pdi
->die_child
;
8858 if (pdi
->tag
== DW_TAG_subprogram
8859 || pdi
->tag
== DW_TAG_inlined_subroutine
8860 || pdi
->tag
== DW_TAG_lexical_block
)
8861 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8862 pdi
= pdi
->die_sibling
;
8867 /* Read a partial die corresponding to an enumeration type. */
8870 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8871 struct dwarf2_cu
*cu
)
8873 struct partial_die_info
*pdi
;
8875 if (enum_pdi
->name
!= NULL
)
8876 add_partial_symbol (enum_pdi
, cu
);
8878 pdi
= enum_pdi
->die_child
;
8881 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8882 complaint (_("malformed enumerator DIE ignored"));
8884 add_partial_symbol (pdi
, cu
);
8885 pdi
= pdi
->die_sibling
;
8889 /* Return the initial uleb128 in the die at INFO_PTR. */
8892 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8894 unsigned int bytes_read
;
8896 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8899 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8900 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8902 Return the corresponding abbrev, or NULL if the number is zero (indicating
8903 an empty DIE). In either case *BYTES_READ will be set to the length of
8904 the initial number. */
8906 static struct abbrev_info
*
8907 peek_die_abbrev (const die_reader_specs
&reader
,
8908 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8910 dwarf2_cu
*cu
= reader
.cu
;
8911 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8912 unsigned int abbrev_number
8913 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8915 if (abbrev_number
== 0)
8918 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8921 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8922 " at offset %s [in module %s]"),
8923 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8924 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8930 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8931 Returns a pointer to the end of a series of DIEs, terminated by an empty
8932 DIE. Any children of the skipped DIEs will also be skipped. */
8934 static const gdb_byte
*
8935 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8939 unsigned int bytes_read
;
8940 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8943 return info_ptr
+ bytes_read
;
8945 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8949 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8950 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8951 abbrev corresponding to that skipped uleb128 should be passed in
8952 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8955 static const gdb_byte
*
8956 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8957 struct abbrev_info
*abbrev
)
8959 unsigned int bytes_read
;
8960 struct attribute attr
;
8961 bfd
*abfd
= reader
->abfd
;
8962 struct dwarf2_cu
*cu
= reader
->cu
;
8963 const gdb_byte
*buffer
= reader
->buffer
;
8964 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8965 unsigned int form
, i
;
8967 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8969 /* The only abbrev we care about is DW_AT_sibling. */
8970 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8973 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8975 if (attr
.form
== DW_FORM_ref_addr
)
8976 complaint (_("ignoring absolute DW_AT_sibling"));
8979 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
8980 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8982 if (sibling_ptr
< info_ptr
)
8983 complaint (_("DW_AT_sibling points backwards"));
8984 else if (sibling_ptr
> reader
->buffer_end
)
8985 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
8991 /* If it isn't DW_AT_sibling, skip this attribute. */
8992 form
= abbrev
->attrs
[i
].form
;
8996 case DW_FORM_ref_addr
:
8997 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8998 and later it is offset sized. */
8999 if (cu
->header
.version
== 2)
9000 info_ptr
+= cu
->header
.addr_size
;
9002 info_ptr
+= cu
->header
.offset_size
;
9004 case DW_FORM_GNU_ref_alt
:
9005 info_ptr
+= cu
->header
.offset_size
;
9008 info_ptr
+= cu
->header
.addr_size
;
9016 case DW_FORM_flag_present
:
9017 case DW_FORM_implicit_const
:
9034 case DW_FORM_ref_sig8
:
9037 case DW_FORM_data16
:
9040 case DW_FORM_string
:
9041 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9042 info_ptr
+= bytes_read
;
9044 case DW_FORM_sec_offset
:
9046 case DW_FORM_GNU_strp_alt
:
9047 info_ptr
+= cu
->header
.offset_size
;
9049 case DW_FORM_exprloc
:
9051 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9052 info_ptr
+= bytes_read
;
9054 case DW_FORM_block1
:
9055 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9057 case DW_FORM_block2
:
9058 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9060 case DW_FORM_block4
:
9061 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9067 case DW_FORM_ref_udata
:
9068 case DW_FORM_GNU_addr_index
:
9069 case DW_FORM_GNU_str_index
:
9070 case DW_FORM_rnglistx
:
9071 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9073 case DW_FORM_indirect
:
9074 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9075 info_ptr
+= bytes_read
;
9076 /* We need to continue parsing from here, so just go back to
9078 goto skip_attribute
;
9081 error (_("Dwarf Error: Cannot handle %s "
9082 "in DWARF reader [in module %s]"),
9083 dwarf_form_name (form
),
9084 bfd_get_filename (abfd
));
9088 if (abbrev
->has_children
)
9089 return skip_children (reader
, info_ptr
);
9094 /* Locate ORIG_PDI's sibling.
9095 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9097 static const gdb_byte
*
9098 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9099 struct partial_die_info
*orig_pdi
,
9100 const gdb_byte
*info_ptr
)
9102 /* Do we know the sibling already? */
9104 if (orig_pdi
->sibling
)
9105 return orig_pdi
->sibling
;
9107 /* Are there any children to deal with? */
9109 if (!orig_pdi
->has_children
)
9112 /* Skip the children the long way. */
9114 return skip_children (reader
, info_ptr
);
9117 /* Expand this partial symbol table into a full symbol table. SELF is
9121 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
9123 struct dwarf2_per_objfile
*dwarf2_per_objfile
9124 = get_dwarf2_per_objfile (objfile
);
9126 gdb_assert (!readin
);
9127 /* If this psymtab is constructed from a debug-only objfile, the
9128 has_section_at_zero flag will not necessarily be correct. We
9129 can get the correct value for this flag by looking at the data
9130 associated with the (presumably stripped) associated objfile. */
9131 if (objfile
->separate_debug_objfile_backlink
)
9133 struct dwarf2_per_objfile
*dpo_backlink
9134 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9136 dwarf2_per_objfile
->has_section_at_zero
9137 = dpo_backlink
->has_section_at_zero
;
9140 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9142 expand_psymtab (objfile
);
9144 process_cu_includes (dwarf2_per_objfile
);
9147 /* Reading in full CUs. */
9149 /* Add PER_CU to the queue. */
9152 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9153 enum language pretend_language
)
9156 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
9159 /* If PER_CU is not yet queued, add it to the queue.
9160 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9162 The result is non-zero if PER_CU was queued, otherwise the result is zero
9163 meaning either PER_CU is already queued or it is already loaded.
9165 N.B. There is an invariant here that if a CU is queued then it is loaded.
9166 The caller is required to load PER_CU if we return non-zero. */
9169 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9170 struct dwarf2_per_cu_data
*per_cu
,
9171 enum language pretend_language
)
9173 /* We may arrive here during partial symbol reading, if we need full
9174 DIEs to process an unusual case (e.g. template arguments). Do
9175 not queue PER_CU, just tell our caller to load its DIEs. */
9176 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9178 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9183 /* Mark the dependence relation so that we don't flush PER_CU
9185 if (dependent_cu
!= NULL
)
9186 dwarf2_add_dependence (dependent_cu
, per_cu
);
9188 /* If it's already on the queue, we have nothing to do. */
9192 /* If the compilation unit is already loaded, just mark it as
9194 if (per_cu
->cu
!= NULL
)
9196 per_cu
->cu
->last_used
= 0;
9200 /* Add it to the queue. */
9201 queue_comp_unit (per_cu
, pretend_language
);
9206 /* Process the queue. */
9209 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9211 if (dwarf_read_debug
)
9213 fprintf_unfiltered (gdb_stdlog
,
9214 "Expanding one or more symtabs of objfile %s ...\n",
9215 objfile_name (dwarf2_per_objfile
->objfile
));
9218 /* The queue starts out with one item, but following a DIE reference
9219 may load a new CU, adding it to the end of the queue. */
9220 while (!dwarf2_per_objfile
->queue
.empty ())
9222 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
9224 if ((dwarf2_per_objfile
->using_index
9225 ? !item
.per_cu
->v
.quick
->compunit_symtab
9226 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
9227 /* Skip dummy CUs. */
9228 && item
.per_cu
->cu
!= NULL
)
9230 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
9231 unsigned int debug_print_threshold
;
9234 if (per_cu
->is_debug_types
)
9236 struct signatured_type
*sig_type
=
9237 (struct signatured_type
*) per_cu
;
9239 sprintf (buf
, "TU %s at offset %s",
9240 hex_string (sig_type
->signature
),
9241 sect_offset_str (per_cu
->sect_off
));
9242 /* There can be 100s of TUs.
9243 Only print them in verbose mode. */
9244 debug_print_threshold
= 2;
9248 sprintf (buf
, "CU at offset %s",
9249 sect_offset_str (per_cu
->sect_off
));
9250 debug_print_threshold
= 1;
9253 if (dwarf_read_debug
>= debug_print_threshold
)
9254 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9256 if (per_cu
->is_debug_types
)
9257 process_full_type_unit (per_cu
, item
.pretend_language
);
9259 process_full_comp_unit (per_cu
, item
.pretend_language
);
9261 if (dwarf_read_debug
>= debug_print_threshold
)
9262 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9265 item
.per_cu
->queued
= 0;
9266 dwarf2_per_objfile
->queue
.pop ();
9269 if (dwarf_read_debug
)
9271 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9272 objfile_name (dwarf2_per_objfile
->objfile
));
9276 /* Read in full symbols for PST, and anything it depends on. */
9279 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9281 struct dwarf2_per_cu_data
*per_cu
;
9286 read_dependencies (objfile
);
9288 per_cu
= per_cu_data
;
9292 /* It's an include file, no symbols to read for it.
9293 Everything is in the parent symtab. */
9298 dw2_do_instantiate_symtab (per_cu
, false);
9301 /* Trivial hash function for die_info: the hash value of a DIE
9302 is its offset in .debug_info for this objfile. */
9305 die_hash (const void *item
)
9307 const struct die_info
*die
= (const struct die_info
*) item
;
9309 return to_underlying (die
->sect_off
);
9312 /* Trivial comparison function for die_info structures: two DIEs
9313 are equal if they have the same offset. */
9316 die_eq (const void *item_lhs
, const void *item_rhs
)
9318 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9319 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9321 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9324 /* Load the DIEs associated with PER_CU into memory. */
9327 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9329 enum language pretend_language
)
9331 gdb_assert (! this_cu
->is_debug_types
);
9333 cutu_reader
reader (this_cu
, NULL
, 1, 1, skip_partial
);
9337 struct dwarf2_cu
*cu
= reader
.cu
;
9338 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9340 gdb_assert (cu
->die_hash
== NULL
);
9342 htab_create_alloc_ex (cu
->header
.length
/ 12,
9346 &cu
->comp_unit_obstack
,
9347 hashtab_obstack_allocate
,
9348 dummy_obstack_deallocate
);
9350 if (reader
.comp_unit_die
->has_children
)
9351 reader
.comp_unit_die
->child
9352 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9353 &info_ptr
, reader
.comp_unit_die
);
9354 cu
->dies
= reader
.comp_unit_die
;
9355 /* comp_unit_die is not stored in die_hash, no need. */
9357 /* We try not to read any attributes in this function, because not
9358 all CUs needed for references have been loaded yet, and symbol
9359 table processing isn't initialized. But we have to set the CU language,
9360 or we won't be able to build types correctly.
9361 Similarly, if we do not read the producer, we can not apply
9362 producer-specific interpretation. */
9363 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9366 /* Add a DIE to the delayed physname list. */
9369 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9370 const char *name
, struct die_info
*die
,
9371 struct dwarf2_cu
*cu
)
9373 struct delayed_method_info mi
;
9375 mi
.fnfield_index
= fnfield_index
;
9379 cu
->method_list
.push_back (mi
);
9382 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9383 "const" / "volatile". If so, decrements LEN by the length of the
9384 modifier and return true. Otherwise return false. */
9388 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9390 size_t mod_len
= sizeof (mod
) - 1;
9391 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9399 /* Compute the physnames of any methods on the CU's method list.
9401 The computation of method physnames is delayed in order to avoid the
9402 (bad) condition that one of the method's formal parameters is of an as yet
9406 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9408 /* Only C++ delays computing physnames. */
9409 if (cu
->method_list
.empty ())
9411 gdb_assert (cu
->language
== language_cplus
);
9413 for (const delayed_method_info
&mi
: cu
->method_list
)
9415 const char *physname
;
9416 struct fn_fieldlist
*fn_flp
9417 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9418 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9419 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9420 = physname
? physname
: "";
9422 /* Since there's no tag to indicate whether a method is a
9423 const/volatile overload, extract that information out of the
9425 if (physname
!= NULL
)
9427 size_t len
= strlen (physname
);
9431 if (physname
[len
] == ')') /* shortcut */
9433 else if (check_modifier (physname
, len
, " const"))
9434 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9435 else if (check_modifier (physname
, len
, " volatile"))
9436 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9443 /* The list is no longer needed. */
9444 cu
->method_list
.clear ();
9447 /* Go objects should be embedded in a DW_TAG_module DIE,
9448 and it's not clear if/how imported objects will appear.
9449 To keep Go support simple until that's worked out,
9450 go back through what we've read and create something usable.
9451 We could do this while processing each DIE, and feels kinda cleaner,
9452 but that way is more invasive.
9453 This is to, for example, allow the user to type "p var" or "b main"
9454 without having to specify the package name, and allow lookups
9455 of module.object to work in contexts that use the expression
9459 fixup_go_packaging (struct dwarf2_cu
*cu
)
9461 gdb::unique_xmalloc_ptr
<char> package_name
;
9462 struct pending
*list
;
9465 for (list
= *cu
->get_builder ()->get_global_symbols ();
9469 for (i
= 0; i
< list
->nsyms
; ++i
)
9471 struct symbol
*sym
= list
->symbol
[i
];
9473 if (sym
->language () == language_go
9474 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9476 gdb::unique_xmalloc_ptr
<char> this_package_name
9477 (go_symbol_package_name (sym
));
9479 if (this_package_name
== NULL
)
9481 if (package_name
== NULL
)
9482 package_name
= std::move (this_package_name
);
9485 struct objfile
*objfile
9486 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9487 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9488 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9489 (symbol_symtab (sym
) != NULL
9490 ? symtab_to_filename_for_display
9491 (symbol_symtab (sym
))
9492 : objfile_name (objfile
)),
9493 this_package_name
.get (), package_name
.get ());
9499 if (package_name
!= NULL
)
9501 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9502 const char *saved_package_name
9503 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
, package_name
.get ());
9504 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9505 saved_package_name
);
9508 sym
= allocate_symbol (objfile
);
9509 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9510 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9511 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9512 e.g., "main" finds the "main" module and not C's main(). */
9513 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9514 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9515 SYMBOL_TYPE (sym
) = type
;
9517 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9521 /* Allocate a fully-qualified name consisting of the two parts on the
9525 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9527 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9530 /* A helper that allocates a struct discriminant_info to attach to a
9533 static struct discriminant_info
*
9534 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9537 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9538 gdb_assert (discriminant_index
== -1
9539 || (discriminant_index
>= 0
9540 && discriminant_index
< TYPE_NFIELDS (type
)));
9541 gdb_assert (default_index
== -1
9542 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9544 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9546 struct discriminant_info
*disc
9547 = ((struct discriminant_info
*)
9549 offsetof (struct discriminant_info
, discriminants
)
9550 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9551 disc
->default_index
= default_index
;
9552 disc
->discriminant_index
= discriminant_index
;
9554 struct dynamic_prop prop
;
9555 prop
.kind
= PROP_UNDEFINED
;
9556 prop
.data
.baton
= disc
;
9558 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9563 /* Some versions of rustc emitted enums in an unusual way.
9565 Ordinary enums were emitted as unions. The first element of each
9566 structure in the union was named "RUST$ENUM$DISR". This element
9567 held the discriminant.
9569 These versions of Rust also implemented the "non-zero"
9570 optimization. When the enum had two values, and one is empty and
9571 the other holds a pointer that cannot be zero, the pointer is used
9572 as the discriminant, with a zero value meaning the empty variant.
9573 Here, the union's first member is of the form
9574 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9575 where the fieldnos are the indices of the fields that should be
9576 traversed in order to find the field (which may be several fields deep)
9577 and the variantname is the name of the variant of the case when the
9580 This function recognizes whether TYPE is of one of these forms,
9581 and, if so, smashes it to be a variant type. */
9584 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9586 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9588 /* We don't need to deal with empty enums. */
9589 if (TYPE_NFIELDS (type
) == 0)
9592 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9593 if (TYPE_NFIELDS (type
) == 1
9594 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9596 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9598 /* Decode the field name to find the offset of the
9600 ULONGEST bit_offset
= 0;
9601 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9602 while (name
[0] >= '0' && name
[0] <= '9')
9605 unsigned long index
= strtoul (name
, &tail
, 10);
9608 || index
>= TYPE_NFIELDS (field_type
)
9609 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9610 != FIELD_LOC_KIND_BITPOS
))
9612 complaint (_("Could not parse Rust enum encoding string \"%s\""
9614 TYPE_FIELD_NAME (type
, 0),
9615 objfile_name (objfile
));
9620 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9621 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9624 /* Make a union to hold the variants. */
9625 struct type
*union_type
= alloc_type (objfile
);
9626 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9627 TYPE_NFIELDS (union_type
) = 3;
9628 TYPE_FIELDS (union_type
)
9629 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9630 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9631 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9633 /* Put the discriminant must at index 0. */
9634 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9635 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9636 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9637 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9639 /* The order of fields doesn't really matter, so put the real
9640 field at index 1 and the data-less field at index 2. */
9641 struct discriminant_info
*disc
9642 = alloc_discriminant_info (union_type
, 0, 1);
9643 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9644 TYPE_FIELD_NAME (union_type
, 1)
9645 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9646 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9647 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9648 TYPE_FIELD_NAME (union_type
, 1));
9650 const char *dataless_name
9651 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9653 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9655 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9656 /* NAME points into the original discriminant name, which
9657 already has the correct lifetime. */
9658 TYPE_FIELD_NAME (union_type
, 2) = name
;
9659 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9660 disc
->discriminants
[2] = 0;
9662 /* Smash this type to be a structure type. We have to do this
9663 because the type has already been recorded. */
9664 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9665 TYPE_NFIELDS (type
) = 1;
9667 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9669 /* Install the variant part. */
9670 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9671 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9672 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9674 /* A union with a single anonymous field is probably an old-style
9676 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9678 /* Smash this type to be a structure type. We have to do this
9679 because the type has already been recorded. */
9680 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9682 /* Make a union to hold the variants. */
9683 struct type
*union_type
= alloc_type (objfile
);
9684 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9685 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9686 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9687 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9688 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9690 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9691 const char *variant_name
9692 = rust_last_path_segment (TYPE_NAME (field_type
));
9693 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9694 TYPE_NAME (field_type
)
9695 = rust_fully_qualify (&objfile
->objfile_obstack
,
9696 TYPE_NAME (type
), variant_name
);
9698 /* Install the union in the outer struct type. */
9699 TYPE_NFIELDS (type
) = 1;
9701 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9702 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9703 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9704 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9706 alloc_discriminant_info (union_type
, -1, 0);
9710 struct type
*disr_type
= nullptr;
9711 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9713 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9715 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9717 /* All fields of a true enum will be structs. */
9720 else if (TYPE_NFIELDS (disr_type
) == 0)
9722 /* Could be data-less variant, so keep going. */
9723 disr_type
= nullptr;
9725 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9726 "RUST$ENUM$DISR") != 0)
9728 /* Not a Rust enum. */
9738 /* If we got here without a discriminant, then it's probably
9740 if (disr_type
== nullptr)
9743 /* Smash this type to be a structure type. We have to do this
9744 because the type has already been recorded. */
9745 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9747 /* Make a union to hold the variants. */
9748 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9749 struct type
*union_type
= alloc_type (objfile
);
9750 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9751 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
9752 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9753 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9754 TYPE_FIELDS (union_type
)
9755 = (struct field
*) TYPE_ZALLOC (union_type
,
9756 (TYPE_NFIELDS (union_type
)
9757 * sizeof (struct field
)));
9759 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
9760 TYPE_NFIELDS (type
) * sizeof (struct field
));
9762 /* Install the discriminant at index 0 in the union. */
9763 TYPE_FIELD (union_type
, 0) = *disr_field
;
9764 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9765 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9767 /* Install the union in the outer struct type. */
9768 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9769 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9770 TYPE_NFIELDS (type
) = 1;
9772 /* Set the size and offset of the union type. */
9773 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9775 /* We need a way to find the correct discriminant given a
9776 variant name. For convenience we build a map here. */
9777 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9778 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9779 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
9781 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9784 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9785 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9789 int n_fields
= TYPE_NFIELDS (union_type
);
9790 struct discriminant_info
*disc
9791 = alloc_discriminant_info (union_type
, 0, -1);
9792 /* Skip the discriminant here. */
9793 for (int i
= 1; i
< n_fields
; ++i
)
9795 /* Find the final word in the name of this variant's type.
9796 That name can be used to look up the correct
9798 const char *variant_name
9799 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
9802 auto iter
= discriminant_map
.find (variant_name
);
9803 if (iter
!= discriminant_map
.end ())
9804 disc
->discriminants
[i
] = iter
->second
;
9806 /* Remove the discriminant field, if it exists. */
9807 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
9808 if (TYPE_NFIELDS (sub_type
) > 0)
9810 --TYPE_NFIELDS (sub_type
);
9811 ++TYPE_FIELDS (sub_type
);
9813 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
9814 TYPE_NAME (sub_type
)
9815 = rust_fully_qualify (&objfile
->objfile_obstack
,
9816 TYPE_NAME (type
), variant_name
);
9821 /* Rewrite some Rust unions to be structures with variants parts. */
9824 rust_union_quirks (struct dwarf2_cu
*cu
)
9826 gdb_assert (cu
->language
== language_rust
);
9827 for (type
*type_
: cu
->rust_unions
)
9828 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9829 /* We don't need this any more. */
9830 cu
->rust_unions
.clear ();
9833 /* Return the symtab for PER_CU. This works properly regardless of
9834 whether we're using the index or psymtabs. */
9836 static struct compunit_symtab
*
9837 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9839 return (per_cu
->dwarf2_per_objfile
->using_index
9840 ? per_cu
->v
.quick
->compunit_symtab
9841 : per_cu
->v
.psymtab
->compunit_symtab
);
9844 /* A helper function for computing the list of all symbol tables
9845 included by PER_CU. */
9848 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9849 htab_t all_children
, htab_t all_type_symtabs
,
9850 struct dwarf2_per_cu_data
*per_cu
,
9851 struct compunit_symtab
*immediate_parent
)
9854 struct compunit_symtab
*cust
;
9856 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9859 /* This inclusion and its children have been processed. */
9864 /* Only add a CU if it has a symbol table. */
9865 cust
= get_compunit_symtab (per_cu
);
9868 /* If this is a type unit only add its symbol table if we haven't
9869 seen it yet (type unit per_cu's can share symtabs). */
9870 if (per_cu
->is_debug_types
)
9872 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9876 result
->push_back (cust
);
9877 if (cust
->user
== NULL
)
9878 cust
->user
= immediate_parent
;
9883 result
->push_back (cust
);
9884 if (cust
->user
== NULL
)
9885 cust
->user
= immediate_parent
;
9889 if (!per_cu
->imported_symtabs_empty ())
9890 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9892 recursively_compute_inclusions (result
, all_children
,
9893 all_type_symtabs
, ptr
, cust
);
9897 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9901 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9903 gdb_assert (! per_cu
->is_debug_types
);
9905 if (!per_cu
->imported_symtabs_empty ())
9908 std::vector
<compunit_symtab
*> result_symtabs
;
9909 htab_t all_children
, all_type_symtabs
;
9910 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9912 /* If we don't have a symtab, we can just skip this case. */
9916 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9917 NULL
, xcalloc
, xfree
);
9918 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9919 NULL
, xcalloc
, xfree
);
9921 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9923 recursively_compute_inclusions (&result_symtabs
, all_children
,
9924 all_type_symtabs
, ptr
, cust
);
9927 /* Now we have a transitive closure of all the included symtabs. */
9928 len
= result_symtabs
.size ();
9930 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9931 struct compunit_symtab
*, len
+ 1);
9932 memcpy (cust
->includes
, result_symtabs
.data (),
9933 len
* sizeof (compunit_symtab
*));
9934 cust
->includes
[len
] = NULL
;
9936 htab_delete (all_children
);
9937 htab_delete (all_type_symtabs
);
9941 /* Compute the 'includes' field for the symtabs of all the CUs we just
9945 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9947 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9949 if (! iter
->is_debug_types
)
9950 compute_compunit_symtab_includes (iter
);
9953 dwarf2_per_objfile
->just_read_cus
.clear ();
9956 /* Generate full symbol information for PER_CU, whose DIEs have
9957 already been loaded into memory. */
9960 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9961 enum language pretend_language
)
9963 struct dwarf2_cu
*cu
= per_cu
->cu
;
9964 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9965 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9966 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9967 CORE_ADDR lowpc
, highpc
;
9968 struct compunit_symtab
*cust
;
9970 struct block
*static_block
;
9973 baseaddr
= objfile
->text_section_offset ();
9975 /* Clear the list here in case something was left over. */
9976 cu
->method_list
.clear ();
9978 cu
->language
= pretend_language
;
9979 cu
->language_defn
= language_def (cu
->language
);
9981 /* Do line number decoding in read_file_scope () */
9982 process_die (cu
->dies
, cu
);
9984 /* For now fudge the Go package. */
9985 if (cu
->language
== language_go
)
9986 fixup_go_packaging (cu
);
9988 /* Now that we have processed all the DIEs in the CU, all the types
9989 should be complete, and it should now be safe to compute all of the
9991 compute_delayed_physnames (cu
);
9993 if (cu
->language
== language_rust
)
9994 rust_union_quirks (cu
);
9996 /* Some compilers don't define a DW_AT_high_pc attribute for the
9997 compilation unit. If the DW_AT_high_pc is missing, synthesize
9998 it, by scanning the DIE's below the compilation unit. */
9999 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10001 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10002 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10004 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10005 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10006 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10007 addrmap to help ensure it has an accurate map of pc values belonging to
10009 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10011 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10012 SECT_OFF_TEXT (objfile
),
10017 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10019 /* Set symtab language to language from DW_AT_language. If the
10020 compilation is from a C file generated by language preprocessors, do
10021 not set the language if it was already deduced by start_subfile. */
10022 if (!(cu
->language
== language_c
10023 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10024 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10026 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10027 produce DW_AT_location with location lists but it can be possibly
10028 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10029 there were bugs in prologue debug info, fixed later in GCC-4.5
10030 by "unwind info for epilogues" patch (which is not directly related).
10032 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10033 needed, it would be wrong due to missing DW_AT_producer there.
10035 Still one can confuse GDB by using non-standard GCC compilation
10036 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10038 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10039 cust
->locations_valid
= 1;
10041 if (gcc_4_minor
>= 5)
10042 cust
->epilogue_unwind_valid
= 1;
10044 cust
->call_site_htab
= cu
->call_site_htab
;
10047 if (dwarf2_per_objfile
->using_index
)
10048 per_cu
->v
.quick
->compunit_symtab
= cust
;
10051 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
10052 pst
->compunit_symtab
= cust
;
10053 pst
->readin
= true;
10056 /* Push it for inclusion processing later. */
10057 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10059 /* Not needed any more. */
10060 cu
->reset_builder ();
10063 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10064 already been loaded into memory. */
10067 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10068 enum language pretend_language
)
10070 struct dwarf2_cu
*cu
= per_cu
->cu
;
10071 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10072 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10073 struct compunit_symtab
*cust
;
10074 struct signatured_type
*sig_type
;
10076 gdb_assert (per_cu
->is_debug_types
);
10077 sig_type
= (struct signatured_type
*) per_cu
;
10079 /* Clear the list here in case something was left over. */
10080 cu
->method_list
.clear ();
10082 cu
->language
= pretend_language
;
10083 cu
->language_defn
= language_def (cu
->language
);
10085 /* The symbol tables are set up in read_type_unit_scope. */
10086 process_die (cu
->dies
, cu
);
10088 /* For now fudge the Go package. */
10089 if (cu
->language
== language_go
)
10090 fixup_go_packaging (cu
);
10092 /* Now that we have processed all the DIEs in the CU, all the types
10093 should be complete, and it should now be safe to compute all of the
10095 compute_delayed_physnames (cu
);
10097 if (cu
->language
== language_rust
)
10098 rust_union_quirks (cu
);
10100 /* TUs share symbol tables.
10101 If this is the first TU to use this symtab, complete the construction
10102 of it with end_expandable_symtab. Otherwise, complete the addition of
10103 this TU's symbols to the existing symtab. */
10104 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10106 buildsym_compunit
*builder
= cu
->get_builder ();
10107 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10108 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10112 /* Set symtab language to language from DW_AT_language. If the
10113 compilation is from a C file generated by language preprocessors,
10114 do not set the language if it was already deduced by
10116 if (!(cu
->language
== language_c
10117 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10118 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10123 cu
->get_builder ()->augment_type_symtab ();
10124 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10127 if (dwarf2_per_objfile
->using_index
)
10128 per_cu
->v
.quick
->compunit_symtab
= cust
;
10131 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
10132 pst
->compunit_symtab
= cust
;
10133 pst
->readin
= true;
10136 /* Not needed any more. */
10137 cu
->reset_builder ();
10140 /* Process an imported unit DIE. */
10143 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10145 struct attribute
*attr
;
10147 /* For now we don't handle imported units in type units. */
10148 if (cu
->per_cu
->is_debug_types
)
10150 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10151 " supported in type units [in module %s]"),
10152 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10155 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10158 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10159 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10160 dwarf2_per_cu_data
*per_cu
10161 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10162 cu
->per_cu
->dwarf2_per_objfile
);
10164 /* If necessary, add it to the queue and load its DIEs. */
10165 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10166 load_full_comp_unit (per_cu
, false, cu
->language
);
10168 cu
->per_cu
->imported_symtabs_push (per_cu
);
10172 /* RAII object that represents a process_die scope: i.e.,
10173 starts/finishes processing a DIE. */
10174 class process_die_scope
10177 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10178 : m_die (die
), m_cu (cu
)
10180 /* We should only be processing DIEs not already in process. */
10181 gdb_assert (!m_die
->in_process
);
10182 m_die
->in_process
= true;
10185 ~process_die_scope ()
10187 m_die
->in_process
= false;
10189 /* If we're done processing the DIE for the CU that owns the line
10190 header, we don't need the line header anymore. */
10191 if (m_cu
->line_header_die_owner
== m_die
)
10193 delete m_cu
->line_header
;
10194 m_cu
->line_header
= NULL
;
10195 m_cu
->line_header_die_owner
= NULL
;
10204 /* Process a die and its children. */
10207 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10209 process_die_scope
scope (die
, cu
);
10213 case DW_TAG_padding
:
10215 case DW_TAG_compile_unit
:
10216 case DW_TAG_partial_unit
:
10217 read_file_scope (die
, cu
);
10219 case DW_TAG_type_unit
:
10220 read_type_unit_scope (die
, cu
);
10222 case DW_TAG_subprogram
:
10223 /* Nested subprograms in Fortran get a prefix. */
10224 if (cu
->language
== language_fortran
10225 && die
->parent
!= NULL
10226 && die
->parent
->tag
== DW_TAG_subprogram
)
10227 cu
->processing_has_namespace_info
= true;
10228 /* Fall through. */
10229 case DW_TAG_inlined_subroutine
:
10230 read_func_scope (die
, cu
);
10232 case DW_TAG_lexical_block
:
10233 case DW_TAG_try_block
:
10234 case DW_TAG_catch_block
:
10235 read_lexical_block_scope (die
, cu
);
10237 case DW_TAG_call_site
:
10238 case DW_TAG_GNU_call_site
:
10239 read_call_site_scope (die
, cu
);
10241 case DW_TAG_class_type
:
10242 case DW_TAG_interface_type
:
10243 case DW_TAG_structure_type
:
10244 case DW_TAG_union_type
:
10245 process_structure_scope (die
, cu
);
10247 case DW_TAG_enumeration_type
:
10248 process_enumeration_scope (die
, cu
);
10251 /* These dies have a type, but processing them does not create
10252 a symbol or recurse to process the children. Therefore we can
10253 read them on-demand through read_type_die. */
10254 case DW_TAG_subroutine_type
:
10255 case DW_TAG_set_type
:
10256 case DW_TAG_array_type
:
10257 case DW_TAG_pointer_type
:
10258 case DW_TAG_ptr_to_member_type
:
10259 case DW_TAG_reference_type
:
10260 case DW_TAG_rvalue_reference_type
:
10261 case DW_TAG_string_type
:
10264 case DW_TAG_base_type
:
10265 case DW_TAG_subrange_type
:
10266 case DW_TAG_typedef
:
10267 /* Add a typedef symbol for the type definition, if it has a
10269 new_symbol (die
, read_type_die (die
, cu
), cu
);
10271 case DW_TAG_common_block
:
10272 read_common_block (die
, cu
);
10274 case DW_TAG_common_inclusion
:
10276 case DW_TAG_namespace
:
10277 cu
->processing_has_namespace_info
= true;
10278 read_namespace (die
, cu
);
10280 case DW_TAG_module
:
10281 cu
->processing_has_namespace_info
= true;
10282 read_module (die
, cu
);
10284 case DW_TAG_imported_declaration
:
10285 cu
->processing_has_namespace_info
= true;
10286 if (read_namespace_alias (die
, cu
))
10288 /* The declaration is not a global namespace alias. */
10289 /* Fall through. */
10290 case DW_TAG_imported_module
:
10291 cu
->processing_has_namespace_info
= true;
10292 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10293 || cu
->language
!= language_fortran
))
10294 complaint (_("Tag '%s' has unexpected children"),
10295 dwarf_tag_name (die
->tag
));
10296 read_import_statement (die
, cu
);
10299 case DW_TAG_imported_unit
:
10300 process_imported_unit_die (die
, cu
);
10303 case DW_TAG_variable
:
10304 read_variable (die
, cu
);
10308 new_symbol (die
, NULL
, cu
);
10313 /* DWARF name computation. */
10315 /* A helper function for dwarf2_compute_name which determines whether DIE
10316 needs to have the name of the scope prepended to the name listed in the
10320 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10322 struct attribute
*attr
;
10326 case DW_TAG_namespace
:
10327 case DW_TAG_typedef
:
10328 case DW_TAG_class_type
:
10329 case DW_TAG_interface_type
:
10330 case DW_TAG_structure_type
:
10331 case DW_TAG_union_type
:
10332 case DW_TAG_enumeration_type
:
10333 case DW_TAG_enumerator
:
10334 case DW_TAG_subprogram
:
10335 case DW_TAG_inlined_subroutine
:
10336 case DW_TAG_member
:
10337 case DW_TAG_imported_declaration
:
10340 case DW_TAG_variable
:
10341 case DW_TAG_constant
:
10342 /* We only need to prefix "globally" visible variables. These include
10343 any variable marked with DW_AT_external or any variable that
10344 lives in a namespace. [Variables in anonymous namespaces
10345 require prefixing, but they are not DW_AT_external.] */
10347 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10349 struct dwarf2_cu
*spec_cu
= cu
;
10351 return die_needs_namespace (die_specification (die
, &spec_cu
),
10355 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10356 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10357 && die
->parent
->tag
!= DW_TAG_module
)
10359 /* A variable in a lexical block of some kind does not need a
10360 namespace, even though in C++ such variables may be external
10361 and have a mangled name. */
10362 if (die
->parent
->tag
== DW_TAG_lexical_block
10363 || die
->parent
->tag
== DW_TAG_try_block
10364 || die
->parent
->tag
== DW_TAG_catch_block
10365 || die
->parent
->tag
== DW_TAG_subprogram
)
10374 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10375 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10376 defined for the given DIE. */
10378 static struct attribute
*
10379 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10381 struct attribute
*attr
;
10383 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10385 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10390 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10391 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10392 defined for the given DIE. */
10394 static const char *
10395 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10397 const char *linkage_name
;
10399 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10400 if (linkage_name
== NULL
)
10401 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10403 return linkage_name
;
10406 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10407 compute the physname for the object, which include a method's:
10408 - formal parameters (C++),
10409 - receiver type (Go),
10411 The term "physname" is a bit confusing.
10412 For C++, for example, it is the demangled name.
10413 For Go, for example, it's the mangled name.
10415 For Ada, return the DIE's linkage name rather than the fully qualified
10416 name. PHYSNAME is ignored..
10418 The result is allocated on the objfile_obstack and canonicalized. */
10420 static const char *
10421 dwarf2_compute_name (const char *name
,
10422 struct die_info
*die
, struct dwarf2_cu
*cu
,
10425 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10428 name
= dwarf2_name (die
, cu
);
10430 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10431 but otherwise compute it by typename_concat inside GDB.
10432 FIXME: Actually this is not really true, or at least not always true.
10433 It's all very confusing. compute_and_set_names doesn't try to demangle
10434 Fortran names because there is no mangling standard. So new_symbol
10435 will set the demangled name to the result of dwarf2_full_name, and it is
10436 the demangled name that GDB uses if it exists. */
10437 if (cu
->language
== language_ada
10438 || (cu
->language
== language_fortran
&& physname
))
10440 /* For Ada unit, we prefer the linkage name over the name, as
10441 the former contains the exported name, which the user expects
10442 to be able to reference. Ideally, we want the user to be able
10443 to reference this entity using either natural or linkage name,
10444 but we haven't started looking at this enhancement yet. */
10445 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10447 if (linkage_name
!= NULL
)
10448 return linkage_name
;
10451 /* These are the only languages we know how to qualify names in. */
10453 && (cu
->language
== language_cplus
10454 || cu
->language
== language_fortran
|| cu
->language
== language_d
10455 || cu
->language
== language_rust
))
10457 if (die_needs_namespace (die
, cu
))
10459 const char *prefix
;
10460 const char *canonical_name
= NULL
;
10464 prefix
= determine_prefix (die
, cu
);
10465 if (*prefix
!= '\0')
10467 gdb::unique_xmalloc_ptr
<char> prefixed_name
10468 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10470 buf
.puts (prefixed_name
.get ());
10475 /* Template parameters may be specified in the DIE's DW_AT_name, or
10476 as children with DW_TAG_template_type_param or
10477 DW_TAG_value_type_param. If the latter, add them to the name
10478 here. If the name already has template parameters, then
10479 skip this step; some versions of GCC emit both, and
10480 it is more efficient to use the pre-computed name.
10482 Something to keep in mind about this process: it is very
10483 unlikely, or in some cases downright impossible, to produce
10484 something that will match the mangled name of a function.
10485 If the definition of the function has the same debug info,
10486 we should be able to match up with it anyway. But fallbacks
10487 using the minimal symbol, for instance to find a method
10488 implemented in a stripped copy of libstdc++, will not work.
10489 If we do not have debug info for the definition, we will have to
10490 match them up some other way.
10492 When we do name matching there is a related problem with function
10493 templates; two instantiated function templates are allowed to
10494 differ only by their return types, which we do not add here. */
10496 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10498 struct attribute
*attr
;
10499 struct die_info
*child
;
10502 die
->building_fullname
= 1;
10504 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10508 const gdb_byte
*bytes
;
10509 struct dwarf2_locexpr_baton
*baton
;
10512 if (child
->tag
!= DW_TAG_template_type_param
10513 && child
->tag
!= DW_TAG_template_value_param
)
10524 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10527 complaint (_("template parameter missing DW_AT_type"));
10528 buf
.puts ("UNKNOWN_TYPE");
10531 type
= die_type (child
, cu
);
10533 if (child
->tag
== DW_TAG_template_type_param
)
10535 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10536 &type_print_raw_options
);
10540 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10543 complaint (_("template parameter missing "
10544 "DW_AT_const_value"));
10545 buf
.puts ("UNKNOWN_VALUE");
10549 dwarf2_const_value_attr (attr
, type
, name
,
10550 &cu
->comp_unit_obstack
, cu
,
10551 &value
, &bytes
, &baton
);
10553 if (TYPE_NOSIGN (type
))
10554 /* GDB prints characters as NUMBER 'CHAR'. If that's
10555 changed, this can use value_print instead. */
10556 c_printchar (value
, type
, &buf
);
10559 struct value_print_options opts
;
10562 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10566 else if (bytes
!= NULL
)
10568 v
= allocate_value (type
);
10569 memcpy (value_contents_writeable (v
), bytes
,
10570 TYPE_LENGTH (type
));
10573 v
= value_from_longest (type
, value
);
10575 /* Specify decimal so that we do not depend on
10577 get_formatted_print_options (&opts
, 'd');
10579 value_print (v
, &buf
, &opts
);
10584 die
->building_fullname
= 0;
10588 /* Close the argument list, with a space if necessary
10589 (nested templates). */
10590 if (!buf
.empty () && buf
.string ().back () == '>')
10597 /* For C++ methods, append formal parameter type
10598 information, if PHYSNAME. */
10600 if (physname
&& die
->tag
== DW_TAG_subprogram
10601 && cu
->language
== language_cplus
)
10603 struct type
*type
= read_type_die (die
, cu
);
10605 c_type_print_args (type
, &buf
, 1, cu
->language
,
10606 &type_print_raw_options
);
10608 if (cu
->language
== language_cplus
)
10610 /* Assume that an artificial first parameter is
10611 "this", but do not crash if it is not. RealView
10612 marks unnamed (and thus unused) parameters as
10613 artificial; there is no way to differentiate
10615 if (TYPE_NFIELDS (type
) > 0
10616 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10617 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10618 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10620 buf
.puts (" const");
10624 const std::string
&intermediate_name
= buf
.string ();
10626 if (cu
->language
== language_cplus
)
10628 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10629 &objfile
->per_bfd
->storage_obstack
);
10631 /* If we only computed INTERMEDIATE_NAME, or if
10632 INTERMEDIATE_NAME is already canonical, then we need to
10633 copy it to the appropriate obstack. */
10634 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10635 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
10636 intermediate_name
);
10638 name
= canonical_name
;
10645 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10646 If scope qualifiers are appropriate they will be added. The result
10647 will be allocated on the storage_obstack, or NULL if the DIE does
10648 not have a name. NAME may either be from a previous call to
10649 dwarf2_name or NULL.
10651 The output string will be canonicalized (if C++). */
10653 static const char *
10654 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10656 return dwarf2_compute_name (name
, die
, cu
, 0);
10659 /* Construct a physname for the given DIE in CU. NAME may either be
10660 from a previous call to dwarf2_name or NULL. The result will be
10661 allocated on the objfile_objstack or NULL if the DIE does not have a
10664 The output string will be canonicalized (if C++). */
10666 static const char *
10667 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10669 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10670 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10673 /* In this case dwarf2_compute_name is just a shortcut not building anything
10675 if (!die_needs_namespace (die
, cu
))
10676 return dwarf2_compute_name (name
, die
, cu
, 1);
10678 mangled
= dw2_linkage_name (die
, cu
);
10680 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10681 See https://github.com/rust-lang/rust/issues/32925. */
10682 if (cu
->language
== language_rust
&& mangled
!= NULL
10683 && strchr (mangled
, '{') != NULL
)
10686 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10688 gdb::unique_xmalloc_ptr
<char> demangled
;
10689 if (mangled
!= NULL
)
10692 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10694 /* Do nothing (do not demangle the symbol name). */
10696 else if (cu
->language
== language_go
)
10698 /* This is a lie, but we already lie to the caller new_symbol.
10699 new_symbol assumes we return the mangled name.
10700 This just undoes that lie until things are cleaned up. */
10704 /* Use DMGL_RET_DROP for C++ template functions to suppress
10705 their return type. It is easier for GDB users to search
10706 for such functions as `name(params)' than `long name(params)'.
10707 In such case the minimal symbol names do not match the full
10708 symbol names but for template functions there is never a need
10709 to look up their definition from their declaration so
10710 the only disadvantage remains the minimal symbol variant
10711 `long name(params)' does not have the proper inferior type. */
10712 demangled
.reset (gdb_demangle (mangled
,
10713 (DMGL_PARAMS
| DMGL_ANSI
10714 | DMGL_RET_DROP
)));
10717 canon
= demangled
.get ();
10725 if (canon
== NULL
|| check_physname
)
10727 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10729 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10731 /* It may not mean a bug in GDB. The compiler could also
10732 compute DW_AT_linkage_name incorrectly. But in such case
10733 GDB would need to be bug-to-bug compatible. */
10735 complaint (_("Computed physname <%s> does not match demangled <%s> "
10736 "(from linkage <%s>) - DIE at %s [in module %s]"),
10737 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10738 objfile_name (objfile
));
10740 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10741 is available here - over computed PHYSNAME. It is safer
10742 against both buggy GDB and buggy compilers. */
10756 retval
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, retval
);
10761 /* Inspect DIE in CU for a namespace alias. If one exists, record
10762 a new symbol for it.
10764 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10767 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10769 struct attribute
*attr
;
10771 /* If the die does not have a name, this is not a namespace
10773 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10777 struct die_info
*d
= die
;
10778 struct dwarf2_cu
*imported_cu
= cu
;
10780 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10781 keep inspecting DIEs until we hit the underlying import. */
10782 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10783 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10785 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10789 d
= follow_die_ref (d
, attr
, &imported_cu
);
10790 if (d
->tag
!= DW_TAG_imported_declaration
)
10794 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10796 complaint (_("DIE at %s has too many recursively imported "
10797 "declarations"), sect_offset_str (d
->sect_off
));
10804 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10806 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10807 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
10809 /* This declaration is a global namespace alias. Add
10810 a symbol for it whose type is the aliased namespace. */
10811 new_symbol (die
, type
, cu
);
10820 /* Return the using directives repository (global or local?) to use in the
10821 current context for CU.
10823 For Ada, imported declarations can materialize renamings, which *may* be
10824 global. However it is impossible (for now?) in DWARF to distinguish
10825 "external" imported declarations and "static" ones. As all imported
10826 declarations seem to be static in all other languages, make them all CU-wide
10827 global only in Ada. */
10829 static struct using_direct
**
10830 using_directives (struct dwarf2_cu
*cu
)
10832 if (cu
->language
== language_ada
10833 && cu
->get_builder ()->outermost_context_p ())
10834 return cu
->get_builder ()->get_global_using_directives ();
10836 return cu
->get_builder ()->get_local_using_directives ();
10839 /* Read the import statement specified by the given die and record it. */
10842 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10844 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10845 struct attribute
*import_attr
;
10846 struct die_info
*imported_die
, *child_die
;
10847 struct dwarf2_cu
*imported_cu
;
10848 const char *imported_name
;
10849 const char *imported_name_prefix
;
10850 const char *canonical_name
;
10851 const char *import_alias
;
10852 const char *imported_declaration
= NULL
;
10853 const char *import_prefix
;
10854 std::vector
<const char *> excludes
;
10856 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10857 if (import_attr
== NULL
)
10859 complaint (_("Tag '%s' has no DW_AT_import"),
10860 dwarf_tag_name (die
->tag
));
10865 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10866 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10867 if (imported_name
== NULL
)
10869 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10871 The import in the following code:
10885 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10886 <52> DW_AT_decl_file : 1
10887 <53> DW_AT_decl_line : 6
10888 <54> DW_AT_import : <0x75>
10889 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10890 <59> DW_AT_name : B
10891 <5b> DW_AT_decl_file : 1
10892 <5c> DW_AT_decl_line : 2
10893 <5d> DW_AT_type : <0x6e>
10895 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10896 <76> DW_AT_byte_size : 4
10897 <77> DW_AT_encoding : 5 (signed)
10899 imports the wrong die ( 0x75 instead of 0x58 ).
10900 This case will be ignored until the gcc bug is fixed. */
10904 /* Figure out the local name after import. */
10905 import_alias
= dwarf2_name (die
, cu
);
10907 /* Figure out where the statement is being imported to. */
10908 import_prefix
= determine_prefix (die
, cu
);
10910 /* Figure out what the scope of the imported die is and prepend it
10911 to the name of the imported die. */
10912 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10914 if (imported_die
->tag
!= DW_TAG_namespace
10915 && imported_die
->tag
!= DW_TAG_module
)
10917 imported_declaration
= imported_name
;
10918 canonical_name
= imported_name_prefix
;
10920 else if (strlen (imported_name_prefix
) > 0)
10921 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10922 imported_name_prefix
,
10923 (cu
->language
== language_d
? "." : "::"),
10924 imported_name
, (char *) NULL
);
10926 canonical_name
= imported_name
;
10928 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10929 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10930 child_die
= sibling_die (child_die
))
10932 /* DWARF-4: A Fortran use statement with a “rename list” may be
10933 represented by an imported module entry with an import attribute
10934 referring to the module and owned entries corresponding to those
10935 entities that are renamed as part of being imported. */
10937 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10939 complaint (_("child DW_TAG_imported_declaration expected "
10940 "- DIE at %s [in module %s]"),
10941 sect_offset_str (child_die
->sect_off
),
10942 objfile_name (objfile
));
10946 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10947 if (import_attr
== NULL
)
10949 complaint (_("Tag '%s' has no DW_AT_import"),
10950 dwarf_tag_name (child_die
->tag
));
10955 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10957 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10958 if (imported_name
== NULL
)
10960 complaint (_("child DW_TAG_imported_declaration has unknown "
10961 "imported name - DIE at %s [in module %s]"),
10962 sect_offset_str (child_die
->sect_off
),
10963 objfile_name (objfile
));
10967 excludes
.push_back (imported_name
);
10969 process_die (child_die
, cu
);
10972 add_using_directive (using_directives (cu
),
10976 imported_declaration
,
10979 &objfile
->objfile_obstack
);
10982 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10983 types, but gives them a size of zero. Starting with version 14,
10984 ICC is compatible with GCC. */
10987 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10989 if (!cu
->checked_producer
)
10990 check_producer (cu
);
10992 return cu
->producer_is_icc_lt_14
;
10995 /* ICC generates a DW_AT_type for C void functions. This was observed on
10996 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10997 which says that void functions should not have a DW_AT_type. */
11000 producer_is_icc (struct dwarf2_cu
*cu
)
11002 if (!cu
->checked_producer
)
11003 check_producer (cu
);
11005 return cu
->producer_is_icc
;
11008 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11009 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11010 this, it was first present in GCC release 4.3.0. */
11013 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11015 if (!cu
->checked_producer
)
11016 check_producer (cu
);
11018 return cu
->producer_is_gcc_lt_4_3
;
11021 static file_and_directory
11022 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11024 file_and_directory res
;
11026 /* Find the filename. Do not use dwarf2_name here, since the filename
11027 is not a source language identifier. */
11028 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11029 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11031 if (res
.comp_dir
== NULL
11032 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11033 && IS_ABSOLUTE_PATH (res
.name
))
11035 res
.comp_dir_storage
= ldirname (res
.name
);
11036 if (!res
.comp_dir_storage
.empty ())
11037 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11039 if (res
.comp_dir
!= NULL
)
11041 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11042 directory, get rid of it. */
11043 const char *cp
= strchr (res
.comp_dir
, ':');
11045 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11046 res
.comp_dir
= cp
+ 1;
11049 if (res
.name
== NULL
)
11050 res
.name
= "<unknown>";
11055 /* Handle DW_AT_stmt_list for a compilation unit.
11056 DIE is the DW_TAG_compile_unit die for CU.
11057 COMP_DIR is the compilation directory. LOWPC is passed to
11058 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11061 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11062 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11064 struct dwarf2_per_objfile
*dwarf2_per_objfile
11065 = cu
->per_cu
->dwarf2_per_objfile
;
11066 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11067 struct attribute
*attr
;
11068 struct line_header line_header_local
;
11069 hashval_t line_header_local_hash
;
11071 int decode_mapping
;
11073 gdb_assert (! cu
->per_cu
->is_debug_types
);
11075 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11079 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11081 /* The line header hash table is only created if needed (it exists to
11082 prevent redundant reading of the line table for partial_units).
11083 If we're given a partial_unit, we'll need it. If we're given a
11084 compile_unit, then use the line header hash table if it's already
11085 created, but don't create one just yet. */
11087 if (dwarf2_per_objfile
->line_header_hash
== NULL
11088 && die
->tag
== DW_TAG_partial_unit
)
11090 dwarf2_per_objfile
->line_header_hash
11091 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11092 line_header_eq_voidp
,
11093 free_line_header_voidp
,
11094 &objfile
->objfile_obstack
,
11095 hashtab_obstack_allocate
,
11096 dummy_obstack_deallocate
);
11099 line_header_local
.sect_off
= line_offset
;
11100 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11101 line_header_local_hash
= line_header_hash (&line_header_local
);
11102 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11104 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11105 &line_header_local
,
11106 line_header_local_hash
, NO_INSERT
);
11108 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11109 is not present in *SLOT (since if there is something in *SLOT then
11110 it will be for a partial_unit). */
11111 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11113 gdb_assert (*slot
!= NULL
);
11114 cu
->line_header
= (struct line_header
*) *slot
;
11119 /* dwarf_decode_line_header does not yet provide sufficient information.
11120 We always have to call also dwarf_decode_lines for it. */
11121 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11125 cu
->line_header
= lh
.release ();
11126 cu
->line_header_die_owner
= die
;
11128 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11132 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11133 &line_header_local
,
11134 line_header_local_hash
, INSERT
);
11135 gdb_assert (slot
!= NULL
);
11137 if (slot
!= NULL
&& *slot
== NULL
)
11139 /* This newly decoded line number information unit will be owned
11140 by line_header_hash hash table. */
11141 *slot
= cu
->line_header
;
11142 cu
->line_header_die_owner
= NULL
;
11146 /* We cannot free any current entry in (*slot) as that struct line_header
11147 may be already used by multiple CUs. Create only temporary decoded
11148 line_header for this CU - it may happen at most once for each line
11149 number information unit. And if we're not using line_header_hash
11150 then this is what we want as well. */
11151 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11153 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11154 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11159 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11162 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11164 struct dwarf2_per_objfile
*dwarf2_per_objfile
11165 = cu
->per_cu
->dwarf2_per_objfile
;
11166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11167 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11168 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11169 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11170 struct attribute
*attr
;
11171 struct die_info
*child_die
;
11172 CORE_ADDR baseaddr
;
11174 prepare_one_comp_unit (cu
, die
, cu
->language
);
11175 baseaddr
= objfile
->text_section_offset ();
11177 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11179 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11180 from finish_block. */
11181 if (lowpc
== ((CORE_ADDR
) -1))
11183 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11185 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11187 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11188 standardised yet. As a workaround for the language detection we fall
11189 back to the DW_AT_producer string. */
11190 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11191 cu
->language
= language_opencl
;
11193 /* Similar hack for Go. */
11194 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11195 set_cu_language (DW_LANG_Go
, cu
);
11197 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11199 /* Decode line number information if present. We do this before
11200 processing child DIEs, so that the line header table is available
11201 for DW_AT_decl_file. */
11202 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11204 /* Process all dies in compilation unit. */
11205 if (die
->child
!= NULL
)
11207 child_die
= die
->child
;
11208 while (child_die
&& child_die
->tag
)
11210 process_die (child_die
, cu
);
11211 child_die
= sibling_die (child_die
);
11215 /* Decode macro information, if present. Dwarf 2 macro information
11216 refers to information in the line number info statement program
11217 header, so we can only read it if we've read the header
11219 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11221 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11222 if (attr
&& cu
->line_header
)
11224 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11225 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11227 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11231 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11232 if (attr
&& cu
->line_header
)
11234 unsigned int macro_offset
= DW_UNSND (attr
);
11236 dwarf_decode_macros (cu
, macro_offset
, 0);
11242 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11244 struct type_unit_group
*tu_group
;
11246 struct attribute
*attr
;
11248 struct signatured_type
*sig_type
;
11250 gdb_assert (per_cu
->is_debug_types
);
11251 sig_type
= (struct signatured_type
*) per_cu
;
11253 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11255 /* If we're using .gdb_index (includes -readnow) then
11256 per_cu->type_unit_group may not have been set up yet. */
11257 if (sig_type
->type_unit_group
== NULL
)
11258 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11259 tu_group
= sig_type
->type_unit_group
;
11261 /* If we've already processed this stmt_list there's no real need to
11262 do it again, we could fake it and just recreate the part we need
11263 (file name,index -> symtab mapping). If data shows this optimization
11264 is useful we can do it then. */
11265 first_time
= tu_group
->compunit_symtab
== NULL
;
11267 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11272 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11273 lh
= dwarf_decode_line_header (line_offset
, this);
11278 start_symtab ("", NULL
, 0);
11281 gdb_assert (tu_group
->symtabs
== NULL
);
11282 gdb_assert (m_builder
== nullptr);
11283 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11284 m_builder
.reset (new struct buildsym_compunit
11285 (COMPUNIT_OBJFILE (cust
), "",
11286 COMPUNIT_DIRNAME (cust
),
11287 compunit_language (cust
),
11293 line_header
= lh
.release ();
11294 line_header_die_owner
= die
;
11298 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11300 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11301 still initializing it, and our caller (a few levels up)
11302 process_full_type_unit still needs to know if this is the first
11305 tu_group
->num_symtabs
= line_header
->file_names_size ();
11306 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11307 line_header
->file_names_size ());
11309 auto &file_names
= line_header
->file_names ();
11310 for (i
= 0; i
< file_names
.size (); ++i
)
11312 file_entry
&fe
= file_names
[i
];
11313 dwarf2_start_subfile (this, fe
.name
,
11314 fe
.include_dir (line_header
));
11315 buildsym_compunit
*b
= get_builder ();
11316 if (b
->get_current_subfile ()->symtab
== NULL
)
11318 /* NOTE: start_subfile will recognize when it's been
11319 passed a file it has already seen. So we can't
11320 assume there's a simple mapping from
11321 cu->line_header->file_names to subfiles, plus
11322 cu->line_header->file_names may contain dups. */
11323 b
->get_current_subfile ()->symtab
11324 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11327 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11328 tu_group
->symtabs
[i
] = fe
.symtab
;
11333 gdb_assert (m_builder
== nullptr);
11334 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11335 m_builder
.reset (new struct buildsym_compunit
11336 (COMPUNIT_OBJFILE (cust
), "",
11337 COMPUNIT_DIRNAME (cust
),
11338 compunit_language (cust
),
11341 auto &file_names
= line_header
->file_names ();
11342 for (i
= 0; i
< file_names
.size (); ++i
)
11344 file_entry
&fe
= file_names
[i
];
11345 fe
.symtab
= tu_group
->symtabs
[i
];
11349 /* The main symtab is allocated last. Type units don't have DW_AT_name
11350 so they don't have a "real" (so to speak) symtab anyway.
11351 There is later code that will assign the main symtab to all symbols
11352 that don't have one. We need to handle the case of a symbol with a
11353 missing symtab (DW_AT_decl_file) anyway. */
11356 /* Process DW_TAG_type_unit.
11357 For TUs we want to skip the first top level sibling if it's not the
11358 actual type being defined by this TU. In this case the first top
11359 level sibling is there to provide context only. */
11362 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11364 struct die_info
*child_die
;
11366 prepare_one_comp_unit (cu
, die
, language_minimal
);
11368 /* Initialize (or reinitialize) the machinery for building symtabs.
11369 We do this before processing child DIEs, so that the line header table
11370 is available for DW_AT_decl_file. */
11371 cu
->setup_type_unit_groups (die
);
11373 if (die
->child
!= NULL
)
11375 child_die
= die
->child
;
11376 while (child_die
&& child_die
->tag
)
11378 process_die (child_die
, cu
);
11379 child_die
= sibling_die (child_die
);
11386 http://gcc.gnu.org/wiki/DebugFission
11387 http://gcc.gnu.org/wiki/DebugFissionDWP
11389 To simplify handling of both DWO files ("object" files with the DWARF info)
11390 and DWP files (a file with the DWOs packaged up into one file), we treat
11391 DWP files as having a collection of virtual DWO files. */
11394 hash_dwo_file (const void *item
)
11396 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11399 hash
= htab_hash_string (dwo_file
->dwo_name
);
11400 if (dwo_file
->comp_dir
!= NULL
)
11401 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11406 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11408 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11409 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11411 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11413 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11414 return lhs
->comp_dir
== rhs
->comp_dir
;
11415 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11418 /* Allocate a hash table for DWO files. */
11421 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11423 auto delete_dwo_file
= [] (void *item
)
11425 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11430 return htab_up (htab_create_alloc_ex (41,
11434 &objfile
->objfile_obstack
,
11435 hashtab_obstack_allocate
,
11436 dummy_obstack_deallocate
));
11439 /* Lookup DWO file DWO_NAME. */
11442 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11443 const char *dwo_name
,
11444 const char *comp_dir
)
11446 struct dwo_file find_entry
;
11449 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11450 dwarf2_per_objfile
->dwo_files
11451 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11453 find_entry
.dwo_name
= dwo_name
;
11454 find_entry
.comp_dir
= comp_dir
;
11455 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11462 hash_dwo_unit (const void *item
)
11464 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11466 /* This drops the top 32 bits of the id, but is ok for a hash. */
11467 return dwo_unit
->signature
;
11471 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11473 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11474 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11476 /* The signature is assumed to be unique within the DWO file.
11477 So while object file CU dwo_id's always have the value zero,
11478 that's OK, assuming each object file DWO file has only one CU,
11479 and that's the rule for now. */
11480 return lhs
->signature
== rhs
->signature
;
11483 /* Allocate a hash table for DWO CUs,TUs.
11484 There is one of these tables for each of CUs,TUs for each DWO file. */
11487 allocate_dwo_unit_table (struct objfile
*objfile
)
11489 /* Start out with a pretty small number.
11490 Generally DWO files contain only one CU and maybe some TUs. */
11491 return htab_create_alloc_ex (3,
11495 &objfile
->objfile_obstack
,
11496 hashtab_obstack_allocate
,
11497 dummy_obstack_deallocate
);
11500 /* die_reader_func for create_dwo_cu. */
11503 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11504 const gdb_byte
*info_ptr
,
11505 struct die_info
*comp_unit_die
,
11506 struct dwo_file
*dwo_file
,
11507 struct dwo_unit
*dwo_unit
)
11509 struct dwarf2_cu
*cu
= reader
->cu
;
11510 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11511 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11513 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11514 if (!signature
.has_value ())
11516 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11517 " its dwo_id [in module %s]"),
11518 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11522 dwo_unit
->dwo_file
= dwo_file
;
11523 dwo_unit
->signature
= *signature
;
11524 dwo_unit
->section
= section
;
11525 dwo_unit
->sect_off
= sect_off
;
11526 dwo_unit
->length
= cu
->per_cu
->length
;
11528 if (dwarf_read_debug
)
11529 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11530 sect_offset_str (sect_off
),
11531 hex_string (dwo_unit
->signature
));
11534 /* Create the dwo_units for the CUs in a DWO_FILE.
11535 Note: This function processes DWO files only, not DWP files. */
11538 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11539 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11540 dwarf2_section_info
§ion
, htab_t
&cus_htab
)
11542 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11543 const gdb_byte
*info_ptr
, *end_ptr
;
11545 section
.read (objfile
);
11546 info_ptr
= section
.buffer
;
11548 if (info_ptr
== NULL
)
11551 if (dwarf_read_debug
)
11553 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11554 section
.get_name (),
11555 section
.get_file_name ());
11558 end_ptr
= info_ptr
+ section
.size
;
11559 while (info_ptr
< end_ptr
)
11561 struct dwarf2_per_cu_data per_cu
;
11562 struct dwo_unit read_unit
{};
11563 struct dwo_unit
*dwo_unit
;
11565 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11567 memset (&per_cu
, 0, sizeof (per_cu
));
11568 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11569 per_cu
.is_debug_types
= 0;
11570 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11571 per_cu
.section
= §ion
;
11573 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11574 if (!reader
.dummy_p
)
11575 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11576 &dwo_file
, &read_unit
);
11577 info_ptr
+= per_cu
.length
;
11579 // If the unit could not be parsed, skip it.
11580 if (read_unit
.dwo_file
== NULL
)
11583 if (cus_htab
== NULL
)
11584 cus_htab
= allocate_dwo_unit_table (objfile
);
11586 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11587 *dwo_unit
= read_unit
;
11588 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11589 gdb_assert (slot
!= NULL
);
11592 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11593 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11595 complaint (_("debug cu entry at offset %s is duplicate to"
11596 " the entry at offset %s, signature %s"),
11597 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11598 hex_string (dwo_unit
->signature
));
11600 *slot
= (void *)dwo_unit
;
11604 /* DWP file .debug_{cu,tu}_index section format:
11605 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11609 Both index sections have the same format, and serve to map a 64-bit
11610 signature to a set of section numbers. Each section begins with a header,
11611 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11612 indexes, and a pool of 32-bit section numbers. The index sections will be
11613 aligned at 8-byte boundaries in the file.
11615 The index section header consists of:
11617 V, 32 bit version number
11619 N, 32 bit number of compilation units or type units in the index
11620 M, 32 bit number of slots in the hash table
11622 Numbers are recorded using the byte order of the application binary.
11624 The hash table begins at offset 16 in the section, and consists of an array
11625 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11626 order of the application binary). Unused slots in the hash table are 0.
11627 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11629 The parallel table begins immediately after the hash table
11630 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11631 array of 32-bit indexes (using the byte order of the application binary),
11632 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11633 table contains a 32-bit index into the pool of section numbers. For unused
11634 hash table slots, the corresponding entry in the parallel table will be 0.
11636 The pool of section numbers begins immediately following the hash table
11637 (at offset 16 + 12 * M from the beginning of the section). The pool of
11638 section numbers consists of an array of 32-bit words (using the byte order
11639 of the application binary). Each item in the array is indexed starting
11640 from 0. The hash table entry provides the index of the first section
11641 number in the set. Additional section numbers in the set follow, and the
11642 set is terminated by a 0 entry (section number 0 is not used in ELF).
11644 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11645 section must be the first entry in the set, and the .debug_abbrev.dwo must
11646 be the second entry. Other members of the set may follow in any order.
11652 DWP Version 2 combines all the .debug_info, etc. sections into one,
11653 and the entries in the index tables are now offsets into these sections.
11654 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11657 Index Section Contents:
11659 Hash Table of Signatures dwp_hash_table.hash_table
11660 Parallel Table of Indices dwp_hash_table.unit_table
11661 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11662 Table of Section Sizes dwp_hash_table.v2.sizes
11664 The index section header consists of:
11666 V, 32 bit version number
11667 L, 32 bit number of columns in the table of section offsets
11668 N, 32 bit number of compilation units or type units in the index
11669 M, 32 bit number of slots in the hash table
11671 Numbers are recorded using the byte order of the application binary.
11673 The hash table has the same format as version 1.
11674 The parallel table of indices has the same format as version 1,
11675 except that the entries are origin-1 indices into the table of sections
11676 offsets and the table of section sizes.
11678 The table of offsets begins immediately following the parallel table
11679 (at offset 16 + 12 * M from the beginning of the section). The table is
11680 a two-dimensional array of 32-bit words (using the byte order of the
11681 application binary), with L columns and N+1 rows, in row-major order.
11682 Each row in the array is indexed starting from 0. The first row provides
11683 a key to the remaining rows: each column in this row provides an identifier
11684 for a debug section, and the offsets in the same column of subsequent rows
11685 refer to that section. The section identifiers are:
11687 DW_SECT_INFO 1 .debug_info.dwo
11688 DW_SECT_TYPES 2 .debug_types.dwo
11689 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11690 DW_SECT_LINE 4 .debug_line.dwo
11691 DW_SECT_LOC 5 .debug_loc.dwo
11692 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11693 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11694 DW_SECT_MACRO 8 .debug_macro.dwo
11696 The offsets provided by the CU and TU index sections are the base offsets
11697 for the contributions made by each CU or TU to the corresponding section
11698 in the package file. Each CU and TU header contains an abbrev_offset
11699 field, used to find the abbreviations table for that CU or TU within the
11700 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11701 be interpreted as relative to the base offset given in the index section.
11702 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11703 should be interpreted as relative to the base offset for .debug_line.dwo,
11704 and offsets into other debug sections obtained from DWARF attributes should
11705 also be interpreted as relative to the corresponding base offset.
11707 The table of sizes begins immediately following the table of offsets.
11708 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11709 with L columns and N rows, in row-major order. Each row in the array is
11710 indexed starting from 1 (row 0 is shared by the two tables).
11714 Hash table lookup is handled the same in version 1 and 2:
11716 We assume that N and M will not exceed 2^32 - 1.
11717 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11719 Given a 64-bit compilation unit signature or a type signature S, an entry
11720 in the hash table is located as follows:
11722 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11723 the low-order k bits all set to 1.
11725 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11727 3) If the hash table entry at index H matches the signature, use that
11728 entry. If the hash table entry at index H is unused (all zeroes),
11729 terminate the search: the signature is not present in the table.
11731 4) Let H = (H + H') modulo M. Repeat at Step 3.
11733 Because M > N and H' and M are relatively prime, the search is guaranteed
11734 to stop at an unused slot or find the match. */
11736 /* Create a hash table to map DWO IDs to their CU/TU entry in
11737 .debug_{info,types}.dwo in DWP_FILE.
11738 Returns NULL if there isn't one.
11739 Note: This function processes DWP files only, not DWO files. */
11741 static struct dwp_hash_table
*
11742 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11743 struct dwp_file
*dwp_file
, int is_debug_types
)
11745 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11746 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11747 const gdb_byte
*index_ptr
, *index_end
;
11748 struct dwarf2_section_info
*index
;
11749 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11750 struct dwp_hash_table
*htab
;
11752 if (is_debug_types
)
11753 index
= &dwp_file
->sections
.tu_index
;
11755 index
= &dwp_file
->sections
.cu_index
;
11757 if (index
->empty ())
11759 index
->read (objfile
);
11761 index_ptr
= index
->buffer
;
11762 index_end
= index_ptr
+ index
->size
;
11764 version
= read_4_bytes (dbfd
, index_ptr
);
11767 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11771 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11773 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11776 if (version
!= 1 && version
!= 2)
11778 error (_("Dwarf Error: unsupported DWP file version (%s)"
11779 " [in module %s]"),
11780 pulongest (version
), dwp_file
->name
);
11782 if (nr_slots
!= (nr_slots
& -nr_slots
))
11784 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11785 " is not power of 2 [in module %s]"),
11786 pulongest (nr_slots
), dwp_file
->name
);
11789 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11790 htab
->version
= version
;
11791 htab
->nr_columns
= nr_columns
;
11792 htab
->nr_units
= nr_units
;
11793 htab
->nr_slots
= nr_slots
;
11794 htab
->hash_table
= index_ptr
;
11795 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11797 /* Exit early if the table is empty. */
11798 if (nr_slots
== 0 || nr_units
== 0
11799 || (version
== 2 && nr_columns
== 0))
11801 /* All must be zero. */
11802 if (nr_slots
!= 0 || nr_units
!= 0
11803 || (version
== 2 && nr_columns
!= 0))
11805 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11806 " all zero [in modules %s]"),
11814 htab
->section_pool
.v1
.indices
=
11815 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11816 /* It's harder to decide whether the section is too small in v1.
11817 V1 is deprecated anyway so we punt. */
11821 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11822 int *ids
= htab
->section_pool
.v2
.section_ids
;
11823 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11824 /* Reverse map for error checking. */
11825 int ids_seen
[DW_SECT_MAX
+ 1];
11828 if (nr_columns
< 2)
11830 error (_("Dwarf Error: bad DWP hash table, too few columns"
11831 " in section table [in module %s]"),
11834 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11836 error (_("Dwarf Error: bad DWP hash table, too many columns"
11837 " in section table [in module %s]"),
11840 memset (ids
, 255, sizeof_ids
);
11841 memset (ids_seen
, 255, sizeof (ids_seen
));
11842 for (i
= 0; i
< nr_columns
; ++i
)
11844 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11846 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11848 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11849 " in section table [in module %s]"),
11850 id
, dwp_file
->name
);
11852 if (ids_seen
[id
] != -1)
11854 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11855 " id %d in section table [in module %s]"),
11856 id
, dwp_file
->name
);
11861 /* Must have exactly one info or types section. */
11862 if (((ids_seen
[DW_SECT_INFO
] != -1)
11863 + (ids_seen
[DW_SECT_TYPES
] != -1))
11866 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11867 " DWO info/types section [in module %s]"),
11870 /* Must have an abbrev section. */
11871 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11873 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11874 " section [in module %s]"),
11877 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11878 htab
->section_pool
.v2
.sizes
=
11879 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11880 * nr_units
* nr_columns
);
11881 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11882 * nr_units
* nr_columns
))
11885 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11886 " [in module %s]"),
11894 /* Update SECTIONS with the data from SECTP.
11896 This function is like the other "locate" section routines that are
11897 passed to bfd_map_over_sections, but in this context the sections to
11898 read comes from the DWP V1 hash table, not the full ELF section table.
11900 The result is non-zero for success, or zero if an error was found. */
11903 locate_v1_virtual_dwo_sections (asection
*sectp
,
11904 struct virtual_v1_dwo_sections
*sections
)
11906 const struct dwop_section_names
*names
= &dwop_section_names
;
11908 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11910 /* There can be only one. */
11911 if (sections
->abbrev
.s
.section
!= NULL
)
11913 sections
->abbrev
.s
.section
= sectp
;
11914 sections
->abbrev
.size
= bfd_section_size (sectp
);
11916 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11917 || section_is_p (sectp
->name
, &names
->types_dwo
))
11919 /* There can be only one. */
11920 if (sections
->info_or_types
.s
.section
!= NULL
)
11922 sections
->info_or_types
.s
.section
= sectp
;
11923 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11925 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11927 /* There can be only one. */
11928 if (sections
->line
.s
.section
!= NULL
)
11930 sections
->line
.s
.section
= sectp
;
11931 sections
->line
.size
= bfd_section_size (sectp
);
11933 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11935 /* There can be only one. */
11936 if (sections
->loc
.s
.section
!= NULL
)
11938 sections
->loc
.s
.section
= sectp
;
11939 sections
->loc
.size
= bfd_section_size (sectp
);
11941 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11943 /* There can be only one. */
11944 if (sections
->macinfo
.s
.section
!= NULL
)
11946 sections
->macinfo
.s
.section
= sectp
;
11947 sections
->macinfo
.size
= bfd_section_size (sectp
);
11949 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11951 /* There can be only one. */
11952 if (sections
->macro
.s
.section
!= NULL
)
11954 sections
->macro
.s
.section
= sectp
;
11955 sections
->macro
.size
= bfd_section_size (sectp
);
11957 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11959 /* There can be only one. */
11960 if (sections
->str_offsets
.s
.section
!= NULL
)
11962 sections
->str_offsets
.s
.section
= sectp
;
11963 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11967 /* No other kind of section is valid. */
11974 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11975 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11976 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11977 This is for DWP version 1 files. */
11979 static struct dwo_unit
*
11980 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11981 struct dwp_file
*dwp_file
,
11982 uint32_t unit_index
,
11983 const char *comp_dir
,
11984 ULONGEST signature
, int is_debug_types
)
11986 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11987 const struct dwp_hash_table
*dwp_htab
=
11988 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11989 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11990 const char *kind
= is_debug_types
? "TU" : "CU";
11991 struct dwo_file
*dwo_file
;
11992 struct dwo_unit
*dwo_unit
;
11993 struct virtual_v1_dwo_sections sections
;
11994 void **dwo_file_slot
;
11997 gdb_assert (dwp_file
->version
== 1);
11999 if (dwarf_read_debug
)
12001 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12003 pulongest (unit_index
), hex_string (signature
),
12007 /* Fetch the sections of this DWO unit.
12008 Put a limit on the number of sections we look for so that bad data
12009 doesn't cause us to loop forever. */
12011 #define MAX_NR_V1_DWO_SECTIONS \
12012 (1 /* .debug_info or .debug_types */ \
12013 + 1 /* .debug_abbrev */ \
12014 + 1 /* .debug_line */ \
12015 + 1 /* .debug_loc */ \
12016 + 1 /* .debug_str_offsets */ \
12017 + 1 /* .debug_macro or .debug_macinfo */ \
12018 + 1 /* trailing zero */)
12020 memset (§ions
, 0, sizeof (sections
));
12022 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12025 uint32_t section_nr
=
12026 read_4_bytes (dbfd
,
12027 dwp_htab
->section_pool
.v1
.indices
12028 + (unit_index
+ i
) * sizeof (uint32_t));
12030 if (section_nr
== 0)
12032 if (section_nr
>= dwp_file
->num_sections
)
12034 error (_("Dwarf Error: bad DWP hash table, section number too large"
12035 " [in module %s]"),
12039 sectp
= dwp_file
->elf_sections
[section_nr
];
12040 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12042 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12043 " [in module %s]"),
12049 || sections
.info_or_types
.empty ()
12050 || sections
.abbrev
.empty ())
12052 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12053 " [in module %s]"),
12056 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12058 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12059 " [in module %s]"),
12063 /* It's easier for the rest of the code if we fake a struct dwo_file and
12064 have dwo_unit "live" in that. At least for now.
12066 The DWP file can be made up of a random collection of CUs and TUs.
12067 However, for each CU + set of TUs that came from the same original DWO
12068 file, we can combine them back into a virtual DWO file to save space
12069 (fewer struct dwo_file objects to allocate). Remember that for really
12070 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12072 std::string virtual_dwo_name
=
12073 string_printf ("virtual-dwo/%d-%d-%d-%d",
12074 sections
.abbrev
.get_id (),
12075 sections
.line
.get_id (),
12076 sections
.loc
.get_id (),
12077 sections
.str_offsets
.get_id ());
12078 /* Can we use an existing virtual DWO file? */
12079 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12080 virtual_dwo_name
.c_str (),
12082 /* Create one if necessary. */
12083 if (*dwo_file_slot
== NULL
)
12085 if (dwarf_read_debug
)
12087 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12088 virtual_dwo_name
.c_str ());
12090 dwo_file
= new struct dwo_file
;
12091 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12093 dwo_file
->comp_dir
= comp_dir
;
12094 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12095 dwo_file
->sections
.line
= sections
.line
;
12096 dwo_file
->sections
.loc
= sections
.loc
;
12097 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12098 dwo_file
->sections
.macro
= sections
.macro
;
12099 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12100 /* The "str" section is global to the entire DWP file. */
12101 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12102 /* The info or types section is assigned below to dwo_unit,
12103 there's no need to record it in dwo_file.
12104 Also, we can't simply record type sections in dwo_file because
12105 we record a pointer into the vector in dwo_unit. As we collect more
12106 types we'll grow the vector and eventually have to reallocate space
12107 for it, invalidating all copies of pointers into the previous
12109 *dwo_file_slot
= dwo_file
;
12113 if (dwarf_read_debug
)
12115 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12116 virtual_dwo_name
.c_str ());
12118 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12121 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12122 dwo_unit
->dwo_file
= dwo_file
;
12123 dwo_unit
->signature
= signature
;
12124 dwo_unit
->section
=
12125 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12126 *dwo_unit
->section
= sections
.info_or_types
;
12127 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12132 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12133 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12134 piece within that section used by a TU/CU, return a virtual section
12135 of just that piece. */
12137 static struct dwarf2_section_info
12138 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12139 struct dwarf2_section_info
*section
,
12140 bfd_size_type offset
, bfd_size_type size
)
12142 struct dwarf2_section_info result
;
12145 gdb_assert (section
!= NULL
);
12146 gdb_assert (!section
->is_virtual
);
12148 memset (&result
, 0, sizeof (result
));
12149 result
.s
.containing_section
= section
;
12150 result
.is_virtual
= true;
12155 sectp
= section
->get_bfd_section ();
12157 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12158 bounds of the real section. This is a pretty-rare event, so just
12159 flag an error (easier) instead of a warning and trying to cope. */
12161 || offset
+ size
> bfd_section_size (sectp
))
12163 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12164 " in section %s [in module %s]"),
12165 sectp
? bfd_section_name (sectp
) : "<unknown>",
12166 objfile_name (dwarf2_per_objfile
->objfile
));
12169 result
.virtual_offset
= offset
;
12170 result
.size
= size
;
12174 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12175 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12176 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12177 This is for DWP version 2 files. */
12179 static struct dwo_unit
*
12180 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12181 struct dwp_file
*dwp_file
,
12182 uint32_t unit_index
,
12183 const char *comp_dir
,
12184 ULONGEST signature
, int is_debug_types
)
12186 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12187 const struct dwp_hash_table
*dwp_htab
=
12188 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12189 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12190 const char *kind
= is_debug_types
? "TU" : "CU";
12191 struct dwo_file
*dwo_file
;
12192 struct dwo_unit
*dwo_unit
;
12193 struct virtual_v2_dwo_sections sections
;
12194 void **dwo_file_slot
;
12197 gdb_assert (dwp_file
->version
== 2);
12199 if (dwarf_read_debug
)
12201 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12203 pulongest (unit_index
), hex_string (signature
),
12207 /* Fetch the section offsets of this DWO unit. */
12209 memset (§ions
, 0, sizeof (sections
));
12211 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12213 uint32_t offset
= read_4_bytes (dbfd
,
12214 dwp_htab
->section_pool
.v2
.offsets
12215 + (((unit_index
- 1) * dwp_htab
->nr_columns
12217 * sizeof (uint32_t)));
12218 uint32_t size
= read_4_bytes (dbfd
,
12219 dwp_htab
->section_pool
.v2
.sizes
12220 + (((unit_index
- 1) * dwp_htab
->nr_columns
12222 * sizeof (uint32_t)));
12224 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12227 case DW_SECT_TYPES
:
12228 sections
.info_or_types_offset
= offset
;
12229 sections
.info_or_types_size
= size
;
12231 case DW_SECT_ABBREV
:
12232 sections
.abbrev_offset
= offset
;
12233 sections
.abbrev_size
= size
;
12236 sections
.line_offset
= offset
;
12237 sections
.line_size
= size
;
12240 sections
.loc_offset
= offset
;
12241 sections
.loc_size
= size
;
12243 case DW_SECT_STR_OFFSETS
:
12244 sections
.str_offsets_offset
= offset
;
12245 sections
.str_offsets_size
= size
;
12247 case DW_SECT_MACINFO
:
12248 sections
.macinfo_offset
= offset
;
12249 sections
.macinfo_size
= size
;
12251 case DW_SECT_MACRO
:
12252 sections
.macro_offset
= offset
;
12253 sections
.macro_size
= size
;
12258 /* It's easier for the rest of the code if we fake a struct dwo_file and
12259 have dwo_unit "live" in that. At least for now.
12261 The DWP file can be made up of a random collection of CUs and TUs.
12262 However, for each CU + set of TUs that came from the same original DWO
12263 file, we can combine them back into a virtual DWO file to save space
12264 (fewer struct dwo_file objects to allocate). Remember that for really
12265 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12267 std::string virtual_dwo_name
=
12268 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12269 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12270 (long) (sections
.line_size
? sections
.line_offset
: 0),
12271 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12272 (long) (sections
.str_offsets_size
12273 ? sections
.str_offsets_offset
: 0));
12274 /* Can we use an existing virtual DWO file? */
12275 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12276 virtual_dwo_name
.c_str (),
12278 /* Create one if necessary. */
12279 if (*dwo_file_slot
== NULL
)
12281 if (dwarf_read_debug
)
12283 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12284 virtual_dwo_name
.c_str ());
12286 dwo_file
= new struct dwo_file
;
12287 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12289 dwo_file
->comp_dir
= comp_dir
;
12290 dwo_file
->sections
.abbrev
=
12291 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12292 sections
.abbrev_offset
, sections
.abbrev_size
);
12293 dwo_file
->sections
.line
=
12294 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12295 sections
.line_offset
, sections
.line_size
);
12296 dwo_file
->sections
.loc
=
12297 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12298 sections
.loc_offset
, sections
.loc_size
);
12299 dwo_file
->sections
.macinfo
=
12300 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12301 sections
.macinfo_offset
, sections
.macinfo_size
);
12302 dwo_file
->sections
.macro
=
12303 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12304 sections
.macro_offset
, sections
.macro_size
);
12305 dwo_file
->sections
.str_offsets
=
12306 create_dwp_v2_section (dwarf2_per_objfile
,
12307 &dwp_file
->sections
.str_offsets
,
12308 sections
.str_offsets_offset
,
12309 sections
.str_offsets_size
);
12310 /* The "str" section is global to the entire DWP file. */
12311 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12312 /* The info or types section is assigned below to dwo_unit,
12313 there's no need to record it in dwo_file.
12314 Also, we can't simply record type sections in dwo_file because
12315 we record a pointer into the vector in dwo_unit. As we collect more
12316 types we'll grow the vector and eventually have to reallocate space
12317 for it, invalidating all copies of pointers into the previous
12319 *dwo_file_slot
= dwo_file
;
12323 if (dwarf_read_debug
)
12325 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12326 virtual_dwo_name
.c_str ());
12328 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12331 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12332 dwo_unit
->dwo_file
= dwo_file
;
12333 dwo_unit
->signature
= signature
;
12334 dwo_unit
->section
=
12335 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12336 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12338 ? &dwp_file
->sections
.types
12339 : &dwp_file
->sections
.info
,
12340 sections
.info_or_types_offset
,
12341 sections
.info_or_types_size
);
12342 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12347 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12348 Returns NULL if the signature isn't found. */
12350 static struct dwo_unit
*
12351 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12352 struct dwp_file
*dwp_file
, const char *comp_dir
,
12353 ULONGEST signature
, int is_debug_types
)
12355 const struct dwp_hash_table
*dwp_htab
=
12356 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12357 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12358 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12359 uint32_t hash
= signature
& mask
;
12360 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12363 struct dwo_unit find_dwo_cu
;
12365 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12366 find_dwo_cu
.signature
= signature
;
12367 slot
= htab_find_slot (is_debug_types
12368 ? dwp_file
->loaded_tus
12369 : dwp_file
->loaded_cus
,
12370 &find_dwo_cu
, INSERT
);
12373 return (struct dwo_unit
*) *slot
;
12375 /* Use a for loop so that we don't loop forever on bad debug info. */
12376 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12378 ULONGEST signature_in_table
;
12380 signature_in_table
=
12381 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12382 if (signature_in_table
== signature
)
12384 uint32_t unit_index
=
12385 read_4_bytes (dbfd
,
12386 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12388 if (dwp_file
->version
== 1)
12390 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12391 dwp_file
, unit_index
,
12392 comp_dir
, signature
,
12397 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12398 dwp_file
, unit_index
,
12399 comp_dir
, signature
,
12402 return (struct dwo_unit
*) *slot
;
12404 if (signature_in_table
== 0)
12406 hash
= (hash
+ hash2
) & mask
;
12409 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12410 " [in module %s]"),
12414 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12415 Open the file specified by FILE_NAME and hand it off to BFD for
12416 preliminary analysis. Return a newly initialized bfd *, which
12417 includes a canonicalized copy of FILE_NAME.
12418 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12419 SEARCH_CWD is true if the current directory is to be searched.
12420 It will be searched before debug-file-directory.
12421 If successful, the file is added to the bfd include table of the
12422 objfile's bfd (see gdb_bfd_record_inclusion).
12423 If unable to find/open the file, return NULL.
12424 NOTE: This function is derived from symfile_bfd_open. */
12426 static gdb_bfd_ref_ptr
12427 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12428 const char *file_name
, int is_dwp
, int search_cwd
)
12431 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12432 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12433 to debug_file_directory. */
12434 const char *search_path
;
12435 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12437 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12440 if (*debug_file_directory
!= '\0')
12442 search_path_holder
.reset (concat (".", dirname_separator_string
,
12443 debug_file_directory
,
12445 search_path
= search_path_holder
.get ();
12451 search_path
= debug_file_directory
;
12453 openp_flags flags
= OPF_RETURN_REALPATH
;
12455 flags
|= OPF_SEARCH_IN_PATH
;
12457 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12458 desc
= openp (search_path
, flags
, file_name
,
12459 O_RDONLY
| O_BINARY
, &absolute_name
);
12463 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12465 if (sym_bfd
== NULL
)
12467 bfd_set_cacheable (sym_bfd
.get (), 1);
12469 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12472 /* Success. Record the bfd as having been included by the objfile's bfd.
12473 This is important because things like demangled_names_hash lives in the
12474 objfile's per_bfd space and may have references to things like symbol
12475 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12476 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12481 /* Try to open DWO file FILE_NAME.
12482 COMP_DIR is the DW_AT_comp_dir attribute.
12483 The result is the bfd handle of the file.
12484 If there is a problem finding or opening the file, return NULL.
12485 Upon success, the canonicalized path of the file is stored in the bfd,
12486 same as symfile_bfd_open. */
12488 static gdb_bfd_ref_ptr
12489 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12490 const char *file_name
, const char *comp_dir
)
12492 if (IS_ABSOLUTE_PATH (file_name
))
12493 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12494 0 /*is_dwp*/, 0 /*search_cwd*/);
12496 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12498 if (comp_dir
!= NULL
)
12500 gdb::unique_xmalloc_ptr
<char> path_to_try
12501 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12503 /* NOTE: If comp_dir is a relative path, this will also try the
12504 search path, which seems useful. */
12505 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12506 path_to_try
.get (),
12508 1 /*search_cwd*/));
12513 /* That didn't work, try debug-file-directory, which, despite its name,
12514 is a list of paths. */
12516 if (*debug_file_directory
== '\0')
12519 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12520 0 /*is_dwp*/, 1 /*search_cwd*/);
12523 /* This function is mapped across the sections and remembers the offset and
12524 size of each of the DWO debugging sections we are interested in. */
12527 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12529 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12530 const struct dwop_section_names
*names
= &dwop_section_names
;
12532 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12534 dwo_sections
->abbrev
.s
.section
= sectp
;
12535 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12537 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12539 dwo_sections
->info
.s
.section
= sectp
;
12540 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12542 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12544 dwo_sections
->line
.s
.section
= sectp
;
12545 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12547 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12549 dwo_sections
->loc
.s
.section
= sectp
;
12550 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12552 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12554 dwo_sections
->macinfo
.s
.section
= sectp
;
12555 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12557 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12559 dwo_sections
->macro
.s
.section
= sectp
;
12560 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12562 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12564 dwo_sections
->str
.s
.section
= sectp
;
12565 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12567 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12569 dwo_sections
->str_offsets
.s
.section
= sectp
;
12570 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12572 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12574 struct dwarf2_section_info type_section
;
12576 memset (&type_section
, 0, sizeof (type_section
));
12577 type_section
.s
.section
= sectp
;
12578 type_section
.size
= bfd_section_size (sectp
);
12579 dwo_sections
->types
.push_back (type_section
);
12583 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12584 by PER_CU. This is for the non-DWP case.
12585 The result is NULL if DWO_NAME can't be found. */
12587 static struct dwo_file
*
12588 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12589 const char *dwo_name
, const char *comp_dir
)
12591 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12593 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12596 if (dwarf_read_debug
)
12597 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12601 dwo_file_up
dwo_file (new struct dwo_file
);
12602 dwo_file
->dwo_name
= dwo_name
;
12603 dwo_file
->comp_dir
= comp_dir
;
12604 dwo_file
->dbfd
= std::move (dbfd
);
12606 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12607 &dwo_file
->sections
);
12609 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12610 dwo_file
->sections
.info
, dwo_file
->cus
);
12612 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12613 dwo_file
->sections
.types
, dwo_file
->tus
);
12615 if (dwarf_read_debug
)
12616 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12618 return dwo_file
.release ();
12621 /* This function is mapped across the sections and remembers the offset and
12622 size of each of the DWP debugging sections common to version 1 and 2 that
12623 we are interested in. */
12626 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12627 void *dwp_file_ptr
)
12629 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12630 const struct dwop_section_names
*names
= &dwop_section_names
;
12631 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12633 /* Record the ELF section number for later lookup: this is what the
12634 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12635 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12636 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12638 /* Look for specific sections that we need. */
12639 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12641 dwp_file
->sections
.str
.s
.section
= sectp
;
12642 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12644 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12646 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12647 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12649 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12651 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12652 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12656 /* This function is mapped across the sections and remembers the offset and
12657 size of each of the DWP version 2 debugging sections that we are interested
12658 in. This is split into a separate function because we don't know if we
12659 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12662 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12664 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12665 const struct dwop_section_names
*names
= &dwop_section_names
;
12666 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12668 /* Record the ELF section number for later lookup: this is what the
12669 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12670 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12671 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12673 /* Look for specific sections that we need. */
12674 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12676 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12677 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12679 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12681 dwp_file
->sections
.info
.s
.section
= sectp
;
12682 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12684 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12686 dwp_file
->sections
.line
.s
.section
= sectp
;
12687 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12689 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12691 dwp_file
->sections
.loc
.s
.section
= sectp
;
12692 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12694 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12696 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12697 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12699 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12701 dwp_file
->sections
.macro
.s
.section
= sectp
;
12702 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12704 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12706 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12707 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12709 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12711 dwp_file
->sections
.types
.s
.section
= sectp
;
12712 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12716 /* Hash function for dwp_file loaded CUs/TUs. */
12719 hash_dwp_loaded_cutus (const void *item
)
12721 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12723 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12724 return dwo_unit
->signature
;
12727 /* Equality function for dwp_file loaded CUs/TUs. */
12730 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12732 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12733 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12735 return dua
->signature
== dub
->signature
;
12738 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12741 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
12743 return htab_create_alloc_ex (3,
12744 hash_dwp_loaded_cutus
,
12745 eq_dwp_loaded_cutus
,
12747 &objfile
->objfile_obstack
,
12748 hashtab_obstack_allocate
,
12749 dummy_obstack_deallocate
);
12752 /* Try to open DWP file FILE_NAME.
12753 The result is the bfd handle of the file.
12754 If there is a problem finding or opening the file, return NULL.
12755 Upon success, the canonicalized path of the file is stored in the bfd,
12756 same as symfile_bfd_open. */
12758 static gdb_bfd_ref_ptr
12759 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12760 const char *file_name
)
12762 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12764 1 /*search_cwd*/));
12768 /* Work around upstream bug 15652.
12769 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12770 [Whether that's a "bug" is debatable, but it is getting in our way.]
12771 We have no real idea where the dwp file is, because gdb's realpath-ing
12772 of the executable's path may have discarded the needed info.
12773 [IWBN if the dwp file name was recorded in the executable, akin to
12774 .gnu_debuglink, but that doesn't exist yet.]
12775 Strip the directory from FILE_NAME and search again. */
12776 if (*debug_file_directory
!= '\0')
12778 /* Don't implicitly search the current directory here.
12779 If the user wants to search "." to handle this case,
12780 it must be added to debug-file-directory. */
12781 return try_open_dwop_file (dwarf2_per_objfile
,
12782 lbasename (file_name
), 1 /*is_dwp*/,
12789 /* Initialize the use of the DWP file for the current objfile.
12790 By convention the name of the DWP file is ${objfile}.dwp.
12791 The result is NULL if it can't be found. */
12793 static std::unique_ptr
<struct dwp_file
>
12794 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12796 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12798 /* Try to find first .dwp for the binary file before any symbolic links
12801 /* If the objfile is a debug file, find the name of the real binary
12802 file and get the name of dwp file from there. */
12803 std::string dwp_name
;
12804 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12806 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12807 const char *backlink_basename
= lbasename (backlink
->original_name
);
12809 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12812 dwp_name
= objfile
->original_name
;
12814 dwp_name
+= ".dwp";
12816 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12818 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12820 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12821 dwp_name
= objfile_name (objfile
);
12822 dwp_name
+= ".dwp";
12823 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12828 if (dwarf_read_debug
)
12829 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12830 return std::unique_ptr
<dwp_file
> ();
12833 const char *name
= bfd_get_filename (dbfd
.get ());
12834 std::unique_ptr
<struct dwp_file
> dwp_file
12835 (new struct dwp_file (name
, std::move (dbfd
)));
12837 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12838 dwp_file
->elf_sections
=
12839 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12840 dwp_file
->num_sections
, asection
*);
12842 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12843 dwarf2_locate_common_dwp_sections
,
12846 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12849 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12852 /* The DWP file version is stored in the hash table. Oh well. */
12853 if (dwp_file
->cus
&& dwp_file
->tus
12854 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12856 /* Technically speaking, we should try to limp along, but this is
12857 pretty bizarre. We use pulongest here because that's the established
12858 portability solution (e.g, we cannot use %u for uint32_t). */
12859 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12860 " TU version %s [in DWP file %s]"),
12861 pulongest (dwp_file
->cus
->version
),
12862 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12866 dwp_file
->version
= dwp_file
->cus
->version
;
12867 else if (dwp_file
->tus
)
12868 dwp_file
->version
= dwp_file
->tus
->version
;
12870 dwp_file
->version
= 2;
12872 if (dwp_file
->version
== 2)
12873 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12874 dwarf2_locate_v2_dwp_sections
,
12877 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
12878 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
12880 if (dwarf_read_debug
)
12882 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12883 fprintf_unfiltered (gdb_stdlog
,
12884 " %s CUs, %s TUs\n",
12885 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12886 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12892 /* Wrapper around open_and_init_dwp_file, only open it once. */
12894 static struct dwp_file
*
12895 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12897 if (! dwarf2_per_objfile
->dwp_checked
)
12899 dwarf2_per_objfile
->dwp_file
12900 = open_and_init_dwp_file (dwarf2_per_objfile
);
12901 dwarf2_per_objfile
->dwp_checked
= 1;
12903 return dwarf2_per_objfile
->dwp_file
.get ();
12906 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12907 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12908 or in the DWP file for the objfile, referenced by THIS_UNIT.
12909 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12910 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12912 This is called, for example, when wanting to read a variable with a
12913 complex location. Therefore we don't want to do file i/o for every call.
12914 Therefore we don't want to look for a DWO file on every call.
12915 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12916 then we check if we've already seen DWO_NAME, and only THEN do we check
12919 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12920 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12922 static struct dwo_unit
*
12923 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12924 const char *dwo_name
, const char *comp_dir
,
12925 ULONGEST signature
, int is_debug_types
)
12927 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12928 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12929 const char *kind
= is_debug_types
? "TU" : "CU";
12930 void **dwo_file_slot
;
12931 struct dwo_file
*dwo_file
;
12932 struct dwp_file
*dwp_file
;
12934 /* First see if there's a DWP file.
12935 If we have a DWP file but didn't find the DWO inside it, don't
12936 look for the original DWO file. It makes gdb behave differently
12937 depending on whether one is debugging in the build tree. */
12939 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12940 if (dwp_file
!= NULL
)
12942 const struct dwp_hash_table
*dwp_htab
=
12943 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12945 if (dwp_htab
!= NULL
)
12947 struct dwo_unit
*dwo_cutu
=
12948 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12949 signature
, is_debug_types
);
12951 if (dwo_cutu
!= NULL
)
12953 if (dwarf_read_debug
)
12955 fprintf_unfiltered (gdb_stdlog
,
12956 "Virtual DWO %s %s found: @%s\n",
12957 kind
, hex_string (signature
),
12958 host_address_to_string (dwo_cutu
));
12966 /* No DWP file, look for the DWO file. */
12968 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12969 dwo_name
, comp_dir
);
12970 if (*dwo_file_slot
== NULL
)
12972 /* Read in the file and build a table of the CUs/TUs it contains. */
12973 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12975 /* NOTE: This will be NULL if unable to open the file. */
12976 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12978 if (dwo_file
!= NULL
)
12980 struct dwo_unit
*dwo_cutu
= NULL
;
12982 if (is_debug_types
&& dwo_file
->tus
)
12984 struct dwo_unit find_dwo_cutu
;
12986 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12987 find_dwo_cutu
.signature
= signature
;
12989 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
12991 else if (!is_debug_types
&& dwo_file
->cus
)
12993 struct dwo_unit find_dwo_cutu
;
12995 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12996 find_dwo_cutu
.signature
= signature
;
12997 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13001 if (dwo_cutu
!= NULL
)
13003 if (dwarf_read_debug
)
13005 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13006 kind
, dwo_name
, hex_string (signature
),
13007 host_address_to_string (dwo_cutu
));
13014 /* We didn't find it. This could mean a dwo_id mismatch, or
13015 someone deleted the DWO/DWP file, or the search path isn't set up
13016 correctly to find the file. */
13018 if (dwarf_read_debug
)
13020 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13021 kind
, dwo_name
, hex_string (signature
));
13024 /* This is a warning and not a complaint because it can be caused by
13025 pilot error (e.g., user accidentally deleting the DWO). */
13027 /* Print the name of the DWP file if we looked there, helps the user
13028 better diagnose the problem. */
13029 std::string dwp_text
;
13031 if (dwp_file
!= NULL
)
13032 dwp_text
= string_printf (" [in DWP file %s]",
13033 lbasename (dwp_file
->name
));
13035 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13036 " [in module %s]"),
13037 kind
, dwo_name
, hex_string (signature
),
13039 this_unit
->is_debug_types
? "TU" : "CU",
13040 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13045 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13046 See lookup_dwo_cutu_unit for details. */
13048 static struct dwo_unit
*
13049 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13050 const char *dwo_name
, const char *comp_dir
,
13051 ULONGEST signature
)
13053 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13056 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13057 See lookup_dwo_cutu_unit for details. */
13059 static struct dwo_unit
*
13060 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13061 const char *dwo_name
, const char *comp_dir
)
13063 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13066 /* Traversal function for queue_and_load_all_dwo_tus. */
13069 queue_and_load_dwo_tu (void **slot
, void *info
)
13071 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13072 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13073 ULONGEST signature
= dwo_unit
->signature
;
13074 struct signatured_type
*sig_type
=
13075 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13077 if (sig_type
!= NULL
)
13079 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13081 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13082 a real dependency of PER_CU on SIG_TYPE. That is detected later
13083 while processing PER_CU. */
13084 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13085 load_full_type_unit (sig_cu
);
13086 per_cu
->imported_symtabs_push (sig_cu
);
13092 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13093 The DWO may have the only definition of the type, though it may not be
13094 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13095 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13098 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13100 struct dwo_unit
*dwo_unit
;
13101 struct dwo_file
*dwo_file
;
13103 gdb_assert (!per_cu
->is_debug_types
);
13104 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13105 gdb_assert (per_cu
->cu
!= NULL
);
13107 dwo_unit
= per_cu
->cu
->dwo_unit
;
13108 gdb_assert (dwo_unit
!= NULL
);
13110 dwo_file
= dwo_unit
->dwo_file
;
13111 if (dwo_file
->tus
!= NULL
)
13112 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13115 /* Read in various DIEs. */
13117 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13118 Inherit only the children of the DW_AT_abstract_origin DIE not being
13119 already referenced by DW_AT_abstract_origin from the children of the
13123 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13125 struct die_info
*child_die
;
13126 sect_offset
*offsetp
;
13127 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13128 struct die_info
*origin_die
;
13129 /* Iterator of the ORIGIN_DIE children. */
13130 struct die_info
*origin_child_die
;
13131 struct attribute
*attr
;
13132 struct dwarf2_cu
*origin_cu
;
13133 struct pending
**origin_previous_list_in_scope
;
13135 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13139 /* Note that following die references may follow to a die in a
13143 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13145 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13147 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13148 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13150 if (die
->tag
!= origin_die
->tag
13151 && !(die
->tag
== DW_TAG_inlined_subroutine
13152 && origin_die
->tag
== DW_TAG_subprogram
))
13153 complaint (_("DIE %s and its abstract origin %s have different tags"),
13154 sect_offset_str (die
->sect_off
),
13155 sect_offset_str (origin_die
->sect_off
));
13157 std::vector
<sect_offset
> offsets
;
13159 for (child_die
= die
->child
;
13160 child_die
&& child_die
->tag
;
13161 child_die
= sibling_die (child_die
))
13163 struct die_info
*child_origin_die
;
13164 struct dwarf2_cu
*child_origin_cu
;
13166 /* We are trying to process concrete instance entries:
13167 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13168 it's not relevant to our analysis here. i.e. detecting DIEs that are
13169 present in the abstract instance but not referenced in the concrete
13171 if (child_die
->tag
== DW_TAG_call_site
13172 || child_die
->tag
== DW_TAG_GNU_call_site
)
13175 /* For each CHILD_DIE, find the corresponding child of
13176 ORIGIN_DIE. If there is more than one layer of
13177 DW_AT_abstract_origin, follow them all; there shouldn't be,
13178 but GCC versions at least through 4.4 generate this (GCC PR
13180 child_origin_die
= child_die
;
13181 child_origin_cu
= cu
;
13184 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13188 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13192 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13193 counterpart may exist. */
13194 if (child_origin_die
!= child_die
)
13196 if (child_die
->tag
!= child_origin_die
->tag
13197 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13198 && child_origin_die
->tag
== DW_TAG_subprogram
))
13199 complaint (_("Child DIE %s and its abstract origin %s have "
13201 sect_offset_str (child_die
->sect_off
),
13202 sect_offset_str (child_origin_die
->sect_off
));
13203 if (child_origin_die
->parent
!= origin_die
)
13204 complaint (_("Child DIE %s and its abstract origin %s have "
13205 "different parents"),
13206 sect_offset_str (child_die
->sect_off
),
13207 sect_offset_str (child_origin_die
->sect_off
));
13209 offsets
.push_back (child_origin_die
->sect_off
);
13212 std::sort (offsets
.begin (), offsets
.end ());
13213 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13214 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13215 if (offsetp
[-1] == *offsetp
)
13216 complaint (_("Multiple children of DIE %s refer "
13217 "to DIE %s as their abstract origin"),
13218 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13220 offsetp
= offsets
.data ();
13221 origin_child_die
= origin_die
->child
;
13222 while (origin_child_die
&& origin_child_die
->tag
)
13224 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13225 while (offsetp
< offsets_end
13226 && *offsetp
< origin_child_die
->sect_off
)
13228 if (offsetp
>= offsets_end
13229 || *offsetp
> origin_child_die
->sect_off
)
13231 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13232 Check whether we're already processing ORIGIN_CHILD_DIE.
13233 This can happen with mutually referenced abstract_origins.
13235 if (!origin_child_die
->in_process
)
13236 process_die (origin_child_die
, origin_cu
);
13238 origin_child_die
= sibling_die (origin_child_die
);
13240 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13242 if (cu
!= origin_cu
)
13243 compute_delayed_physnames (origin_cu
);
13247 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13249 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13250 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13251 struct context_stack
*newobj
;
13254 struct die_info
*child_die
;
13255 struct attribute
*attr
, *call_line
, *call_file
;
13257 CORE_ADDR baseaddr
;
13258 struct block
*block
;
13259 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13260 std::vector
<struct symbol
*> template_args
;
13261 struct template_symbol
*templ_func
= NULL
;
13265 /* If we do not have call site information, we can't show the
13266 caller of this inlined function. That's too confusing, so
13267 only use the scope for local variables. */
13268 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13269 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13270 if (call_line
== NULL
|| call_file
== NULL
)
13272 read_lexical_block_scope (die
, cu
);
13277 baseaddr
= objfile
->text_section_offset ();
13279 name
= dwarf2_name (die
, cu
);
13281 /* Ignore functions with missing or empty names. These are actually
13282 illegal according to the DWARF standard. */
13285 complaint (_("missing name for subprogram DIE at %s"),
13286 sect_offset_str (die
->sect_off
));
13290 /* Ignore functions with missing or invalid low and high pc attributes. */
13291 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13292 <= PC_BOUNDS_INVALID
)
13294 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13295 if (!attr
|| !DW_UNSND (attr
))
13296 complaint (_("cannot get low and high bounds "
13297 "for subprogram DIE at %s"),
13298 sect_offset_str (die
->sect_off
));
13302 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13303 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13305 /* If we have any template arguments, then we must allocate a
13306 different sort of symbol. */
13307 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13309 if (child_die
->tag
== DW_TAG_template_type_param
13310 || child_die
->tag
== DW_TAG_template_value_param
)
13312 templ_func
= allocate_template_symbol (objfile
);
13313 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13318 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13319 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13320 (struct symbol
*) templ_func
);
13322 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13323 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13326 /* If there is a location expression for DW_AT_frame_base, record
13328 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13329 if (attr
!= nullptr)
13330 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13332 /* If there is a location for the static link, record it. */
13333 newobj
->static_link
= NULL
;
13334 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13335 if (attr
!= nullptr)
13337 newobj
->static_link
13338 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13339 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13340 dwarf2_per_cu_addr_type (cu
->per_cu
));
13343 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13345 if (die
->child
!= NULL
)
13347 child_die
= die
->child
;
13348 while (child_die
&& child_die
->tag
)
13350 if (child_die
->tag
== DW_TAG_template_type_param
13351 || child_die
->tag
== DW_TAG_template_value_param
)
13353 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13356 template_args
.push_back (arg
);
13359 process_die (child_die
, cu
);
13360 child_die
= sibling_die (child_die
);
13364 inherit_abstract_dies (die
, cu
);
13366 /* If we have a DW_AT_specification, we might need to import using
13367 directives from the context of the specification DIE. See the
13368 comment in determine_prefix. */
13369 if (cu
->language
== language_cplus
13370 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13372 struct dwarf2_cu
*spec_cu
= cu
;
13373 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13377 child_die
= spec_die
->child
;
13378 while (child_die
&& child_die
->tag
)
13380 if (child_die
->tag
== DW_TAG_imported_module
)
13381 process_die (child_die
, spec_cu
);
13382 child_die
= sibling_die (child_die
);
13385 /* In some cases, GCC generates specification DIEs that
13386 themselves contain DW_AT_specification attributes. */
13387 spec_die
= die_specification (spec_die
, &spec_cu
);
13391 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13392 /* Make a block for the local symbols within. */
13393 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13394 cstk
.static_link
, lowpc
, highpc
);
13396 /* For C++, set the block's scope. */
13397 if ((cu
->language
== language_cplus
13398 || cu
->language
== language_fortran
13399 || cu
->language
== language_d
13400 || cu
->language
== language_rust
)
13401 && cu
->processing_has_namespace_info
)
13402 block_set_scope (block
, determine_prefix (die
, cu
),
13403 &objfile
->objfile_obstack
);
13405 /* If we have address ranges, record them. */
13406 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13408 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13410 /* Attach template arguments to function. */
13411 if (!template_args
.empty ())
13413 gdb_assert (templ_func
!= NULL
);
13415 templ_func
->n_template_arguments
= template_args
.size ();
13416 templ_func
->template_arguments
13417 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13418 templ_func
->n_template_arguments
);
13419 memcpy (templ_func
->template_arguments
,
13420 template_args
.data (),
13421 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13423 /* Make sure that the symtab is set on the new symbols. Even
13424 though they don't appear in this symtab directly, other parts
13425 of gdb assume that symbols do, and this is reasonably
13427 for (symbol
*sym
: template_args
)
13428 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13431 /* In C++, we can have functions nested inside functions (e.g., when
13432 a function declares a class that has methods). This means that
13433 when we finish processing a function scope, we may need to go
13434 back to building a containing block's symbol lists. */
13435 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13436 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13438 /* If we've finished processing a top-level function, subsequent
13439 symbols go in the file symbol list. */
13440 if (cu
->get_builder ()->outermost_context_p ())
13441 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13444 /* Process all the DIES contained within a lexical block scope. Start
13445 a new scope, process the dies, and then close the scope. */
13448 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13450 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13451 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13452 CORE_ADDR lowpc
, highpc
;
13453 struct die_info
*child_die
;
13454 CORE_ADDR baseaddr
;
13456 baseaddr
= objfile
->text_section_offset ();
13458 /* Ignore blocks with missing or invalid low and high pc attributes. */
13459 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13460 as multiple lexical blocks? Handling children in a sane way would
13461 be nasty. Might be easier to properly extend generic blocks to
13462 describe ranges. */
13463 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13465 case PC_BOUNDS_NOT_PRESENT
:
13466 /* DW_TAG_lexical_block has no attributes, process its children as if
13467 there was no wrapping by that DW_TAG_lexical_block.
13468 GCC does no longer produces such DWARF since GCC r224161. */
13469 for (child_die
= die
->child
;
13470 child_die
!= NULL
&& child_die
->tag
;
13471 child_die
= sibling_die (child_die
))
13472 process_die (child_die
, cu
);
13474 case PC_BOUNDS_INVALID
:
13477 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13478 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13480 cu
->get_builder ()->push_context (0, lowpc
);
13481 if (die
->child
!= NULL
)
13483 child_die
= die
->child
;
13484 while (child_die
&& child_die
->tag
)
13486 process_die (child_die
, cu
);
13487 child_die
= sibling_die (child_die
);
13490 inherit_abstract_dies (die
, cu
);
13491 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13493 if (*cu
->get_builder ()->get_local_symbols () != NULL
13494 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13496 struct block
*block
13497 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13498 cstk
.start_addr
, highpc
);
13500 /* Note that recording ranges after traversing children, as we
13501 do here, means that recording a parent's ranges entails
13502 walking across all its children's ranges as they appear in
13503 the address map, which is quadratic behavior.
13505 It would be nicer to record the parent's ranges before
13506 traversing its children, simply overriding whatever you find
13507 there. But since we don't even decide whether to create a
13508 block until after we've traversed its children, that's hard
13510 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13512 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13513 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13516 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13519 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13521 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13522 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13523 CORE_ADDR pc
, baseaddr
;
13524 struct attribute
*attr
;
13525 struct call_site
*call_site
, call_site_local
;
13528 struct die_info
*child_die
;
13530 baseaddr
= objfile
->text_section_offset ();
13532 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13535 /* This was a pre-DWARF-5 GNU extension alias
13536 for DW_AT_call_return_pc. */
13537 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13541 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13542 "DIE %s [in module %s]"),
13543 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13546 pc
= attr
->value_as_address () + baseaddr
;
13547 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13549 if (cu
->call_site_htab
== NULL
)
13550 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13551 NULL
, &objfile
->objfile_obstack
,
13552 hashtab_obstack_allocate
, NULL
);
13553 call_site_local
.pc
= pc
;
13554 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13557 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13558 "DIE %s [in module %s]"),
13559 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13560 objfile_name (objfile
));
13564 /* Count parameters at the caller. */
13567 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13568 child_die
= sibling_die (child_die
))
13570 if (child_die
->tag
!= DW_TAG_call_site_parameter
13571 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13573 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13574 "DW_TAG_call_site child DIE %s [in module %s]"),
13575 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13576 objfile_name (objfile
));
13584 = ((struct call_site
*)
13585 obstack_alloc (&objfile
->objfile_obstack
,
13586 sizeof (*call_site
)
13587 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13589 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13590 call_site
->pc
= pc
;
13592 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13593 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13595 struct die_info
*func_die
;
13597 /* Skip also over DW_TAG_inlined_subroutine. */
13598 for (func_die
= die
->parent
;
13599 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13600 && func_die
->tag
!= DW_TAG_subroutine_type
;
13601 func_die
= func_die
->parent
);
13603 /* DW_AT_call_all_calls is a superset
13604 of DW_AT_call_all_tail_calls. */
13606 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13607 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13608 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13609 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13611 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13612 not complete. But keep CALL_SITE for look ups via call_site_htab,
13613 both the initial caller containing the real return address PC and
13614 the final callee containing the current PC of a chain of tail
13615 calls do not need to have the tail call list complete. But any
13616 function candidate for a virtual tail call frame searched via
13617 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13618 determined unambiguously. */
13622 struct type
*func_type
= NULL
;
13625 func_type
= get_die_type (func_die
, cu
);
13626 if (func_type
!= NULL
)
13628 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13630 /* Enlist this call site to the function. */
13631 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13632 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13635 complaint (_("Cannot find function owning DW_TAG_call_site "
13636 "DIE %s [in module %s]"),
13637 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13641 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13643 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13645 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13648 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13649 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13651 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13652 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13653 /* Keep NULL DWARF_BLOCK. */;
13654 else if (attr
->form_is_block ())
13656 struct dwarf2_locexpr_baton
*dlbaton
;
13658 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13659 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13660 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13661 dlbaton
->per_cu
= cu
->per_cu
;
13663 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13665 else if (attr
->form_is_ref ())
13667 struct dwarf2_cu
*target_cu
= cu
;
13668 struct die_info
*target_die
;
13670 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13671 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13672 if (die_is_declaration (target_die
, target_cu
))
13674 const char *target_physname
;
13676 /* Prefer the mangled name; otherwise compute the demangled one. */
13677 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13678 if (target_physname
== NULL
)
13679 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13680 if (target_physname
== NULL
)
13681 complaint (_("DW_AT_call_target target DIE has invalid "
13682 "physname, for referencing DIE %s [in module %s]"),
13683 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13685 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13691 /* DW_AT_entry_pc should be preferred. */
13692 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13693 <= PC_BOUNDS_INVALID
)
13694 complaint (_("DW_AT_call_target target DIE has invalid "
13695 "low pc, for referencing DIE %s [in module %s]"),
13696 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13699 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13700 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13705 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13706 "block nor reference, for DIE %s [in module %s]"),
13707 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13709 call_site
->per_cu
= cu
->per_cu
;
13711 for (child_die
= die
->child
;
13712 child_die
&& child_die
->tag
;
13713 child_die
= sibling_die (child_die
))
13715 struct call_site_parameter
*parameter
;
13716 struct attribute
*loc
, *origin
;
13718 if (child_die
->tag
!= DW_TAG_call_site_parameter
13719 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13721 /* Already printed the complaint above. */
13725 gdb_assert (call_site
->parameter_count
< nparams
);
13726 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13728 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13729 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13730 register is contained in DW_AT_call_value. */
13732 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13733 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13734 if (origin
== NULL
)
13736 /* This was a pre-DWARF-5 GNU extension alias
13737 for DW_AT_call_parameter. */
13738 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13740 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13742 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13744 sect_offset sect_off
13745 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
13746 if (!offset_in_cu_p (&cu
->header
, sect_off
))
13748 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13749 binding can be done only inside one CU. Such referenced DIE
13750 therefore cannot be even moved to DW_TAG_partial_unit. */
13751 complaint (_("DW_AT_call_parameter offset is not in CU for "
13752 "DW_TAG_call_site child DIE %s [in module %s]"),
13753 sect_offset_str (child_die
->sect_off
),
13754 objfile_name (objfile
));
13757 parameter
->u
.param_cu_off
13758 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13760 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13762 complaint (_("No DW_FORM_block* DW_AT_location for "
13763 "DW_TAG_call_site child DIE %s [in module %s]"),
13764 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13769 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13770 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13771 if (parameter
->u
.dwarf_reg
!= -1)
13772 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13773 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13774 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13775 ¶meter
->u
.fb_offset
))
13776 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13779 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13780 "for DW_FORM_block* DW_AT_location is supported for "
13781 "DW_TAG_call_site child DIE %s "
13783 sect_offset_str (child_die
->sect_off
),
13784 objfile_name (objfile
));
13789 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13791 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13792 if (attr
== NULL
|| !attr
->form_is_block ())
13794 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13795 "DW_TAG_call_site child DIE %s [in module %s]"),
13796 sect_offset_str (child_die
->sect_off
),
13797 objfile_name (objfile
));
13800 parameter
->value
= DW_BLOCK (attr
)->data
;
13801 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13803 /* Parameters are not pre-cleared by memset above. */
13804 parameter
->data_value
= NULL
;
13805 parameter
->data_value_size
= 0;
13806 call_site
->parameter_count
++;
13808 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13810 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13811 if (attr
!= nullptr)
13813 if (!attr
->form_is_block ())
13814 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13815 "DW_TAG_call_site child DIE %s [in module %s]"),
13816 sect_offset_str (child_die
->sect_off
),
13817 objfile_name (objfile
));
13820 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13821 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13827 /* Helper function for read_variable. If DIE represents a virtual
13828 table, then return the type of the concrete object that is
13829 associated with the virtual table. Otherwise, return NULL. */
13831 static struct type
*
13832 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13834 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13838 /* Find the type DIE. */
13839 struct die_info
*type_die
= NULL
;
13840 struct dwarf2_cu
*type_cu
= cu
;
13842 if (attr
->form_is_ref ())
13843 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13844 if (type_die
== NULL
)
13847 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13849 return die_containing_type (type_die
, type_cu
);
13852 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13855 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13857 struct rust_vtable_symbol
*storage
= NULL
;
13859 if (cu
->language
== language_rust
)
13861 struct type
*containing_type
= rust_containing_type (die
, cu
);
13863 if (containing_type
!= NULL
)
13865 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13867 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
13868 initialize_objfile_symbol (storage
);
13869 storage
->concrete_type
= containing_type
;
13870 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13874 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13875 struct attribute
*abstract_origin
13876 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13877 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13878 if (res
== NULL
&& loc
&& abstract_origin
)
13880 /* We have a variable without a name, but with a location and an abstract
13881 origin. This may be a concrete instance of an abstract variable
13882 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13884 struct dwarf2_cu
*origin_cu
= cu
;
13885 struct die_info
*origin_die
13886 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13887 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13888 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13892 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13893 reading .debug_rnglists.
13894 Callback's type should be:
13895 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13896 Return true if the attributes are present and valid, otherwise,
13899 template <typename Callback
>
13901 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13902 Callback
&&callback
)
13904 struct dwarf2_per_objfile
*dwarf2_per_objfile
13905 = cu
->per_cu
->dwarf2_per_objfile
;
13906 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13907 bfd
*obfd
= objfile
->obfd
;
13908 /* Base address selection entry. */
13911 const gdb_byte
*buffer
;
13912 CORE_ADDR baseaddr
;
13913 bool overflow
= false;
13915 found_base
= cu
->base_known
;
13916 base
= cu
->base_address
;
13918 dwarf2_per_objfile
->rnglists
.read (objfile
);
13919 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13921 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13925 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13927 baseaddr
= objfile
->text_section_offset ();
13931 /* Initialize it due to a false compiler warning. */
13932 CORE_ADDR range_beginning
= 0, range_end
= 0;
13933 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13934 + dwarf2_per_objfile
->rnglists
.size
);
13935 unsigned int bytes_read
;
13937 if (buffer
== buf_end
)
13942 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13945 case DW_RLE_end_of_list
:
13947 case DW_RLE_base_address
:
13948 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13953 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13955 buffer
+= bytes_read
;
13957 case DW_RLE_start_length
:
13958 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13963 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13964 buffer
+= bytes_read
;
13965 range_end
= (range_beginning
13966 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13967 buffer
+= bytes_read
;
13968 if (buffer
> buf_end
)
13974 case DW_RLE_offset_pair
:
13975 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13976 buffer
+= bytes_read
;
13977 if (buffer
> buf_end
)
13982 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13983 buffer
+= bytes_read
;
13984 if (buffer
> buf_end
)
13990 case DW_RLE_start_end
:
13991 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13996 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13997 buffer
+= bytes_read
;
13998 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13999 buffer
+= bytes_read
;
14002 complaint (_("Invalid .debug_rnglists data (no base address)"));
14005 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14007 if (rlet
== DW_RLE_base_address
)
14012 /* We have no valid base address for the ranges
14014 complaint (_("Invalid .debug_rnglists data (no base address)"));
14018 if (range_beginning
> range_end
)
14020 /* Inverted range entries are invalid. */
14021 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14025 /* Empty range entries have no effect. */
14026 if (range_beginning
== range_end
)
14029 range_beginning
+= base
;
14032 /* A not-uncommon case of bad debug info.
14033 Don't pollute the addrmap with bad data. */
14034 if (range_beginning
+ baseaddr
== 0
14035 && !dwarf2_per_objfile
->has_section_at_zero
)
14037 complaint (_(".debug_rnglists entry has start address of zero"
14038 " [in module %s]"), objfile_name (objfile
));
14042 callback (range_beginning
, range_end
);
14047 complaint (_("Offset %d is not terminated "
14048 "for DW_AT_ranges attribute"),
14056 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14057 Callback's type should be:
14058 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14059 Return 1 if the attributes are present and valid, otherwise, return 0. */
14061 template <typename Callback
>
14063 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14064 Callback
&&callback
)
14066 struct dwarf2_per_objfile
*dwarf2_per_objfile
14067 = cu
->per_cu
->dwarf2_per_objfile
;
14068 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14069 struct comp_unit_head
*cu_header
= &cu
->header
;
14070 bfd
*obfd
= objfile
->obfd
;
14071 unsigned int addr_size
= cu_header
->addr_size
;
14072 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14073 /* Base address selection entry. */
14076 unsigned int dummy
;
14077 const gdb_byte
*buffer
;
14078 CORE_ADDR baseaddr
;
14080 if (cu_header
->version
>= 5)
14081 return dwarf2_rnglists_process (offset
, cu
, callback
);
14083 found_base
= cu
->base_known
;
14084 base
= cu
->base_address
;
14086 dwarf2_per_objfile
->ranges
.read (objfile
);
14087 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14089 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14093 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14095 baseaddr
= objfile
->text_section_offset ();
14099 CORE_ADDR range_beginning
, range_end
;
14101 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14102 buffer
+= addr_size
;
14103 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14104 buffer
+= addr_size
;
14105 offset
+= 2 * addr_size
;
14107 /* An end of list marker is a pair of zero addresses. */
14108 if (range_beginning
== 0 && range_end
== 0)
14109 /* Found the end of list entry. */
14112 /* Each base address selection entry is a pair of 2 values.
14113 The first is the largest possible address, the second is
14114 the base address. Check for a base address here. */
14115 if ((range_beginning
& mask
) == mask
)
14117 /* If we found the largest possible address, then we already
14118 have the base address in range_end. */
14126 /* We have no valid base address for the ranges
14128 complaint (_("Invalid .debug_ranges data (no base address)"));
14132 if (range_beginning
> range_end
)
14134 /* Inverted range entries are invalid. */
14135 complaint (_("Invalid .debug_ranges data (inverted range)"));
14139 /* Empty range entries have no effect. */
14140 if (range_beginning
== range_end
)
14143 range_beginning
+= base
;
14146 /* A not-uncommon case of bad debug info.
14147 Don't pollute the addrmap with bad data. */
14148 if (range_beginning
+ baseaddr
== 0
14149 && !dwarf2_per_objfile
->has_section_at_zero
)
14151 complaint (_(".debug_ranges entry has start address of zero"
14152 " [in module %s]"), objfile_name (objfile
));
14156 callback (range_beginning
, range_end
);
14162 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14163 Return 1 if the attributes are present and valid, otherwise, return 0.
14164 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14167 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14168 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14169 dwarf2_psymtab
*ranges_pst
)
14171 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14172 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14173 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
14176 CORE_ADDR high
= 0;
14179 retval
= dwarf2_ranges_process (offset
, cu
,
14180 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14182 if (ranges_pst
!= NULL
)
14187 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14188 range_beginning
+ baseaddr
)
14190 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14191 range_end
+ baseaddr
)
14193 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14194 lowpc
, highpc
- 1, ranges_pst
);
14197 /* FIXME: This is recording everything as a low-high
14198 segment of consecutive addresses. We should have a
14199 data structure for discontiguous block ranges
14203 low
= range_beginning
;
14209 if (range_beginning
< low
)
14210 low
= range_beginning
;
14211 if (range_end
> high
)
14219 /* If the first entry is an end-of-list marker, the range
14220 describes an empty scope, i.e. no instructions. */
14226 *high_return
= high
;
14230 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14231 definition for the return value. *LOWPC and *HIGHPC are set iff
14232 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14234 static enum pc_bounds_kind
14235 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14236 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14237 dwarf2_psymtab
*pst
)
14239 struct dwarf2_per_objfile
*dwarf2_per_objfile
14240 = cu
->per_cu
->dwarf2_per_objfile
;
14241 struct attribute
*attr
;
14242 struct attribute
*attr_high
;
14244 CORE_ADDR high
= 0;
14245 enum pc_bounds_kind ret
;
14247 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14250 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14251 if (attr
!= nullptr)
14253 low
= attr
->value_as_address ();
14254 high
= attr_high
->value_as_address ();
14255 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14259 /* Found high w/o low attribute. */
14260 return PC_BOUNDS_INVALID
;
14262 /* Found consecutive range of addresses. */
14263 ret
= PC_BOUNDS_HIGH_LOW
;
14267 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14270 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14271 We take advantage of the fact that DW_AT_ranges does not appear
14272 in DW_TAG_compile_unit of DWO files. */
14273 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14274 unsigned int ranges_offset
= (DW_UNSND (attr
)
14275 + (need_ranges_base
14279 /* Value of the DW_AT_ranges attribute is the offset in the
14280 .debug_ranges section. */
14281 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14282 return PC_BOUNDS_INVALID
;
14283 /* Found discontinuous range of addresses. */
14284 ret
= PC_BOUNDS_RANGES
;
14287 return PC_BOUNDS_NOT_PRESENT
;
14290 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14292 return PC_BOUNDS_INVALID
;
14294 /* When using the GNU linker, .gnu.linkonce. sections are used to
14295 eliminate duplicate copies of functions and vtables and such.
14296 The linker will arbitrarily choose one and discard the others.
14297 The AT_*_pc values for such functions refer to local labels in
14298 these sections. If the section from that file was discarded, the
14299 labels are not in the output, so the relocs get a value of 0.
14300 If this is a discarded function, mark the pc bounds as invalid,
14301 so that GDB will ignore it. */
14302 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14303 return PC_BOUNDS_INVALID
;
14311 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14312 its low and high PC addresses. Do nothing if these addresses could not
14313 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14314 and HIGHPC to the high address if greater than HIGHPC. */
14317 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14318 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14319 struct dwarf2_cu
*cu
)
14321 CORE_ADDR low
, high
;
14322 struct die_info
*child
= die
->child
;
14324 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14326 *lowpc
= std::min (*lowpc
, low
);
14327 *highpc
= std::max (*highpc
, high
);
14330 /* If the language does not allow nested subprograms (either inside
14331 subprograms or lexical blocks), we're done. */
14332 if (cu
->language
!= language_ada
)
14335 /* Check all the children of the given DIE. If it contains nested
14336 subprograms, then check their pc bounds. Likewise, we need to
14337 check lexical blocks as well, as they may also contain subprogram
14339 while (child
&& child
->tag
)
14341 if (child
->tag
== DW_TAG_subprogram
14342 || child
->tag
== DW_TAG_lexical_block
)
14343 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14344 child
= sibling_die (child
);
14348 /* Get the low and high pc's represented by the scope DIE, and store
14349 them in *LOWPC and *HIGHPC. If the correct values can't be
14350 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14353 get_scope_pc_bounds (struct die_info
*die
,
14354 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14355 struct dwarf2_cu
*cu
)
14357 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14358 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14359 CORE_ADDR current_low
, current_high
;
14361 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14362 >= PC_BOUNDS_RANGES
)
14364 best_low
= current_low
;
14365 best_high
= current_high
;
14369 struct die_info
*child
= die
->child
;
14371 while (child
&& child
->tag
)
14373 switch (child
->tag
) {
14374 case DW_TAG_subprogram
:
14375 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14377 case DW_TAG_namespace
:
14378 case DW_TAG_module
:
14379 /* FIXME: carlton/2004-01-16: Should we do this for
14380 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14381 that current GCC's always emit the DIEs corresponding
14382 to definitions of methods of classes as children of a
14383 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14384 the DIEs giving the declarations, which could be
14385 anywhere). But I don't see any reason why the
14386 standards says that they have to be there. */
14387 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14389 if (current_low
!= ((CORE_ADDR
) -1))
14391 best_low
= std::min (best_low
, current_low
);
14392 best_high
= std::max (best_high
, current_high
);
14400 child
= sibling_die (child
);
14405 *highpc
= best_high
;
14408 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14412 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14413 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14415 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14416 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14417 struct attribute
*attr
;
14418 struct attribute
*attr_high
;
14420 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14423 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14424 if (attr
!= nullptr)
14426 CORE_ADDR low
= attr
->value_as_address ();
14427 CORE_ADDR high
= attr_high
->value_as_address ();
14429 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14432 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14433 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14434 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14438 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14439 if (attr
!= nullptr)
14441 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14442 We take advantage of the fact that DW_AT_ranges does not appear
14443 in DW_TAG_compile_unit of DWO files. */
14444 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14446 /* The value of the DW_AT_ranges attribute is the offset of the
14447 address range list in the .debug_ranges section. */
14448 unsigned long offset
= (DW_UNSND (attr
)
14449 + (need_ranges_base
? cu
->ranges_base
: 0));
14451 std::vector
<blockrange
> blockvec
;
14452 dwarf2_ranges_process (offset
, cu
,
14453 [&] (CORE_ADDR start
, CORE_ADDR end
)
14457 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14458 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14459 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14460 blockvec
.emplace_back (start
, end
);
14463 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14467 /* Check whether the producer field indicates either of GCC < 4.6, or the
14468 Intel C/C++ compiler, and cache the result in CU. */
14471 check_producer (struct dwarf2_cu
*cu
)
14475 if (cu
->producer
== NULL
)
14477 /* For unknown compilers expect their behavior is DWARF version
14480 GCC started to support .debug_types sections by -gdwarf-4 since
14481 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14482 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14483 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14484 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14486 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14488 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14489 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14491 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14493 cu
->producer_is_icc
= true;
14494 cu
->producer_is_icc_lt_14
= major
< 14;
14496 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14497 cu
->producer_is_codewarrior
= true;
14500 /* For other non-GCC compilers, expect their behavior is DWARF version
14504 cu
->checked_producer
= true;
14507 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14508 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14509 during 4.6.0 experimental. */
14512 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14514 if (!cu
->checked_producer
)
14515 check_producer (cu
);
14517 return cu
->producer_is_gxx_lt_4_6
;
14521 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14522 with incorrect is_stmt attributes. */
14525 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14527 if (!cu
->checked_producer
)
14528 check_producer (cu
);
14530 return cu
->producer_is_codewarrior
;
14533 /* Return the default accessibility type if it is not overridden by
14534 DW_AT_accessibility. */
14536 static enum dwarf_access_attribute
14537 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14539 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14541 /* The default DWARF 2 accessibility for members is public, the default
14542 accessibility for inheritance is private. */
14544 if (die
->tag
!= DW_TAG_inheritance
)
14545 return DW_ACCESS_public
;
14547 return DW_ACCESS_private
;
14551 /* DWARF 3+ defines the default accessibility a different way. The same
14552 rules apply now for DW_TAG_inheritance as for the members and it only
14553 depends on the container kind. */
14555 if (die
->parent
->tag
== DW_TAG_class_type
)
14556 return DW_ACCESS_private
;
14558 return DW_ACCESS_public
;
14562 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14563 offset. If the attribute was not found return 0, otherwise return
14564 1. If it was found but could not properly be handled, set *OFFSET
14568 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14571 struct attribute
*attr
;
14573 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14578 /* Note that we do not check for a section offset first here.
14579 This is because DW_AT_data_member_location is new in DWARF 4,
14580 so if we see it, we can assume that a constant form is really
14581 a constant and not a section offset. */
14582 if (attr
->form_is_constant ())
14583 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14584 else if (attr
->form_is_section_offset ())
14585 dwarf2_complex_location_expr_complaint ();
14586 else if (attr
->form_is_block ())
14587 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14589 dwarf2_complex_location_expr_complaint ();
14597 /* Add an aggregate field to the field list. */
14600 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14601 struct dwarf2_cu
*cu
)
14603 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14604 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14605 struct nextfield
*new_field
;
14606 struct attribute
*attr
;
14608 const char *fieldname
= "";
14610 if (die
->tag
== DW_TAG_inheritance
)
14612 fip
->baseclasses
.emplace_back ();
14613 new_field
= &fip
->baseclasses
.back ();
14617 fip
->fields
.emplace_back ();
14618 new_field
= &fip
->fields
.back ();
14623 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14624 if (attr
!= nullptr)
14625 new_field
->accessibility
= DW_UNSND (attr
);
14627 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14628 if (new_field
->accessibility
!= DW_ACCESS_public
)
14629 fip
->non_public_fields
= 1;
14631 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14632 if (attr
!= nullptr)
14633 new_field
->virtuality
= DW_UNSND (attr
);
14635 new_field
->virtuality
= DW_VIRTUALITY_none
;
14637 fp
= &new_field
->field
;
14639 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14643 /* Data member other than a C++ static data member. */
14645 /* Get type of field. */
14646 fp
->type
= die_type (die
, cu
);
14648 SET_FIELD_BITPOS (*fp
, 0);
14650 /* Get bit size of field (zero if none). */
14651 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14652 if (attr
!= nullptr)
14654 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14658 FIELD_BITSIZE (*fp
) = 0;
14661 /* Get bit offset of field. */
14662 if (handle_data_member_location (die
, cu
, &offset
))
14663 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14664 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14665 if (attr
!= nullptr)
14667 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14669 /* For big endian bits, the DW_AT_bit_offset gives the
14670 additional bit offset from the MSB of the containing
14671 anonymous object to the MSB of the field. We don't
14672 have to do anything special since we don't need to
14673 know the size of the anonymous object. */
14674 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14678 /* For little endian bits, compute the bit offset to the
14679 MSB of the anonymous object, subtract off the number of
14680 bits from the MSB of the field to the MSB of the
14681 object, and then subtract off the number of bits of
14682 the field itself. The result is the bit offset of
14683 the LSB of the field. */
14684 int anonymous_size
;
14685 int bit_offset
= DW_UNSND (attr
);
14687 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14688 if (attr
!= nullptr)
14690 /* The size of the anonymous object containing
14691 the bit field is explicit, so use the
14692 indicated size (in bytes). */
14693 anonymous_size
= DW_UNSND (attr
);
14697 /* The size of the anonymous object containing
14698 the bit field must be inferred from the type
14699 attribute of the data member containing the
14701 anonymous_size
= TYPE_LENGTH (fp
->type
);
14703 SET_FIELD_BITPOS (*fp
,
14704 (FIELD_BITPOS (*fp
)
14705 + anonymous_size
* bits_per_byte
14706 - bit_offset
- FIELD_BITSIZE (*fp
)));
14709 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14711 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14712 + dwarf2_get_attr_constant_value (attr
, 0)));
14714 /* Get name of field. */
14715 fieldname
= dwarf2_name (die
, cu
);
14716 if (fieldname
== NULL
)
14719 /* The name is already allocated along with this objfile, so we don't
14720 need to duplicate it for the type. */
14721 fp
->name
= fieldname
;
14723 /* Change accessibility for artificial fields (e.g. virtual table
14724 pointer or virtual base class pointer) to private. */
14725 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14727 FIELD_ARTIFICIAL (*fp
) = 1;
14728 new_field
->accessibility
= DW_ACCESS_private
;
14729 fip
->non_public_fields
= 1;
14732 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14734 /* C++ static member. */
14736 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14737 is a declaration, but all versions of G++ as of this writing
14738 (so through at least 3.2.1) incorrectly generate
14739 DW_TAG_variable tags. */
14741 const char *physname
;
14743 /* Get name of field. */
14744 fieldname
= dwarf2_name (die
, cu
);
14745 if (fieldname
== NULL
)
14748 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14750 /* Only create a symbol if this is an external value.
14751 new_symbol checks this and puts the value in the global symbol
14752 table, which we want. If it is not external, new_symbol
14753 will try to put the value in cu->list_in_scope which is wrong. */
14754 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14756 /* A static const member, not much different than an enum as far as
14757 we're concerned, except that we can support more types. */
14758 new_symbol (die
, NULL
, cu
);
14761 /* Get physical name. */
14762 physname
= dwarf2_physname (fieldname
, die
, cu
);
14764 /* The name is already allocated along with this objfile, so we don't
14765 need to duplicate it for the type. */
14766 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14767 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14768 FIELD_NAME (*fp
) = fieldname
;
14770 else if (die
->tag
== DW_TAG_inheritance
)
14774 /* C++ base class field. */
14775 if (handle_data_member_location (die
, cu
, &offset
))
14776 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14777 FIELD_BITSIZE (*fp
) = 0;
14778 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14779 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14781 else if (die
->tag
== DW_TAG_variant_part
)
14783 /* process_structure_scope will treat this DIE as a union. */
14784 process_structure_scope (die
, cu
);
14786 /* The variant part is relative to the start of the enclosing
14788 SET_FIELD_BITPOS (*fp
, 0);
14789 fp
->type
= get_die_type (die
, cu
);
14790 fp
->artificial
= 1;
14791 fp
->name
= "<<variant>>";
14793 /* Normally a DW_TAG_variant_part won't have a size, but our
14794 representation requires one, so set it to the maximum of the
14795 child sizes, being sure to account for the offset at which
14796 each child is seen. */
14797 if (TYPE_LENGTH (fp
->type
) == 0)
14800 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
14802 unsigned len
= ((TYPE_FIELD_BITPOS (fp
->type
, i
) + 7) / 8
14803 + TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)));
14807 TYPE_LENGTH (fp
->type
) = max
;
14811 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14814 /* Can the type given by DIE define another type? */
14817 type_can_define_types (const struct die_info
*die
)
14821 case DW_TAG_typedef
:
14822 case DW_TAG_class_type
:
14823 case DW_TAG_structure_type
:
14824 case DW_TAG_union_type
:
14825 case DW_TAG_enumeration_type
:
14833 /* Add a type definition defined in the scope of the FIP's class. */
14836 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14837 struct dwarf2_cu
*cu
)
14839 struct decl_field fp
;
14840 memset (&fp
, 0, sizeof (fp
));
14842 gdb_assert (type_can_define_types (die
));
14844 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14845 fp
.name
= dwarf2_name (die
, cu
);
14846 fp
.type
= read_type_die (die
, cu
);
14848 /* Save accessibility. */
14849 enum dwarf_access_attribute accessibility
;
14850 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14852 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14854 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14855 switch (accessibility
)
14857 case DW_ACCESS_public
:
14858 /* The assumed value if neither private nor protected. */
14860 case DW_ACCESS_private
:
14863 case DW_ACCESS_protected
:
14864 fp
.is_protected
= 1;
14867 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14870 if (die
->tag
== DW_TAG_typedef
)
14871 fip
->typedef_field_list
.push_back (fp
);
14873 fip
->nested_types_list
.push_back (fp
);
14876 /* Create the vector of fields, and attach it to the type. */
14879 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14880 struct dwarf2_cu
*cu
)
14882 int nfields
= fip
->nfields
;
14884 /* Record the field count, allocate space for the array of fields,
14885 and create blank accessibility bitfields if necessary. */
14886 TYPE_NFIELDS (type
) = nfields
;
14887 TYPE_FIELDS (type
) = (struct field
*)
14888 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14890 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14892 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14894 TYPE_FIELD_PRIVATE_BITS (type
) =
14895 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14896 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14898 TYPE_FIELD_PROTECTED_BITS (type
) =
14899 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14900 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14902 TYPE_FIELD_IGNORE_BITS (type
) =
14903 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14904 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14907 /* If the type has baseclasses, allocate and clear a bit vector for
14908 TYPE_FIELD_VIRTUAL_BITS. */
14909 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14911 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14912 unsigned char *pointer
;
14914 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14915 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14916 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14917 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14918 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14921 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
14923 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
14925 for (int index
= 0; index
< nfields
; ++index
)
14927 struct nextfield
&field
= fip
->fields
[index
];
14929 if (field
.variant
.is_discriminant
)
14930 di
->discriminant_index
= index
;
14931 else if (field
.variant
.default_branch
)
14932 di
->default_index
= index
;
14934 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
14938 /* Copy the saved-up fields into the field vector. */
14939 for (int i
= 0; i
< nfields
; ++i
)
14941 struct nextfield
&field
14942 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14943 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14945 TYPE_FIELD (type
, i
) = field
.field
;
14946 switch (field
.accessibility
)
14948 case DW_ACCESS_private
:
14949 if (cu
->language
!= language_ada
)
14950 SET_TYPE_FIELD_PRIVATE (type
, i
);
14953 case DW_ACCESS_protected
:
14954 if (cu
->language
!= language_ada
)
14955 SET_TYPE_FIELD_PROTECTED (type
, i
);
14958 case DW_ACCESS_public
:
14962 /* Unknown accessibility. Complain and treat it as public. */
14964 complaint (_("unsupported accessibility %d"),
14965 field
.accessibility
);
14969 if (i
< fip
->baseclasses
.size ())
14971 switch (field
.virtuality
)
14973 case DW_VIRTUALITY_virtual
:
14974 case DW_VIRTUALITY_pure_virtual
:
14975 if (cu
->language
== language_ada
)
14976 error (_("unexpected virtuality in component of Ada type"));
14977 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14984 /* Return true if this member function is a constructor, false
14988 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14990 const char *fieldname
;
14991 const char *type_name
;
14994 if (die
->parent
== NULL
)
14997 if (die
->parent
->tag
!= DW_TAG_structure_type
14998 && die
->parent
->tag
!= DW_TAG_union_type
14999 && die
->parent
->tag
!= DW_TAG_class_type
)
15002 fieldname
= dwarf2_name (die
, cu
);
15003 type_name
= dwarf2_name (die
->parent
, cu
);
15004 if (fieldname
== NULL
|| type_name
== NULL
)
15007 len
= strlen (fieldname
);
15008 return (strncmp (fieldname
, type_name
, len
) == 0
15009 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15012 /* Check if the given VALUE is a recognized enum
15013 dwarf_defaulted_attribute constant according to DWARF5 spec,
15017 is_valid_DW_AT_defaulted (ULONGEST value
)
15021 case DW_DEFAULTED_no
:
15022 case DW_DEFAULTED_in_class
:
15023 case DW_DEFAULTED_out_of_class
:
15027 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
15031 /* Add a member function to the proper fieldlist. */
15034 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15035 struct type
*type
, struct dwarf2_cu
*cu
)
15037 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15038 struct attribute
*attr
;
15040 struct fnfieldlist
*flp
= nullptr;
15041 struct fn_field
*fnp
;
15042 const char *fieldname
;
15043 struct type
*this_type
;
15044 enum dwarf_access_attribute accessibility
;
15046 if (cu
->language
== language_ada
)
15047 error (_("unexpected member function in Ada type"));
15049 /* Get name of member function. */
15050 fieldname
= dwarf2_name (die
, cu
);
15051 if (fieldname
== NULL
)
15054 /* Look up member function name in fieldlist. */
15055 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15057 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15059 flp
= &fip
->fnfieldlists
[i
];
15064 /* Create a new fnfieldlist if necessary. */
15065 if (flp
== nullptr)
15067 fip
->fnfieldlists
.emplace_back ();
15068 flp
= &fip
->fnfieldlists
.back ();
15069 flp
->name
= fieldname
;
15070 i
= fip
->fnfieldlists
.size () - 1;
15073 /* Create a new member function field and add it to the vector of
15075 flp
->fnfields
.emplace_back ();
15076 fnp
= &flp
->fnfields
.back ();
15078 /* Delay processing of the physname until later. */
15079 if (cu
->language
== language_cplus
)
15080 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15084 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15085 fnp
->physname
= physname
? physname
: "";
15088 fnp
->type
= alloc_type (objfile
);
15089 this_type
= read_type_die (die
, cu
);
15090 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15092 int nparams
= TYPE_NFIELDS (this_type
);
15094 /* TYPE is the domain of this method, and THIS_TYPE is the type
15095 of the method itself (TYPE_CODE_METHOD). */
15096 smash_to_method_type (fnp
->type
, type
,
15097 TYPE_TARGET_TYPE (this_type
),
15098 TYPE_FIELDS (this_type
),
15099 TYPE_NFIELDS (this_type
),
15100 TYPE_VARARGS (this_type
));
15102 /* Handle static member functions.
15103 Dwarf2 has no clean way to discern C++ static and non-static
15104 member functions. G++ helps GDB by marking the first
15105 parameter for non-static member functions (which is the this
15106 pointer) as artificial. We obtain this information from
15107 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15108 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15109 fnp
->voffset
= VOFFSET_STATIC
;
15112 complaint (_("member function type missing for '%s'"),
15113 dwarf2_full_name (fieldname
, die
, cu
));
15115 /* Get fcontext from DW_AT_containing_type if present. */
15116 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15117 fnp
->fcontext
= die_containing_type (die
, cu
);
15119 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15120 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15122 /* Get accessibility. */
15123 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15124 if (attr
!= nullptr)
15125 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15127 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15128 switch (accessibility
)
15130 case DW_ACCESS_private
:
15131 fnp
->is_private
= 1;
15133 case DW_ACCESS_protected
:
15134 fnp
->is_protected
= 1;
15138 /* Check for artificial methods. */
15139 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15140 if (attr
&& DW_UNSND (attr
) != 0)
15141 fnp
->is_artificial
= 1;
15143 /* Check for defaulted methods. */
15144 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15145 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15146 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15148 /* Check for deleted methods. */
15149 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15150 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15151 fnp
->is_deleted
= 1;
15153 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15155 /* Get index in virtual function table if it is a virtual member
15156 function. For older versions of GCC, this is an offset in the
15157 appropriate virtual table, as specified by DW_AT_containing_type.
15158 For everyone else, it is an expression to be evaluated relative
15159 to the object address. */
15161 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15162 if (attr
!= nullptr)
15164 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15166 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15168 /* Old-style GCC. */
15169 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15171 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15172 || (DW_BLOCK (attr
)->size
> 1
15173 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15174 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15176 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15177 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15178 dwarf2_complex_location_expr_complaint ();
15180 fnp
->voffset
/= cu
->header
.addr_size
;
15184 dwarf2_complex_location_expr_complaint ();
15186 if (!fnp
->fcontext
)
15188 /* If there is no `this' field and no DW_AT_containing_type,
15189 we cannot actually find a base class context for the
15191 if (TYPE_NFIELDS (this_type
) == 0
15192 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15194 complaint (_("cannot determine context for virtual member "
15195 "function \"%s\" (offset %s)"),
15196 fieldname
, sect_offset_str (die
->sect_off
));
15201 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15205 else if (attr
->form_is_section_offset ())
15207 dwarf2_complex_location_expr_complaint ();
15211 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15217 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15218 if (attr
&& DW_UNSND (attr
))
15220 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15221 complaint (_("Member function \"%s\" (offset %s) is virtual "
15222 "but the vtable offset is not specified"),
15223 fieldname
, sect_offset_str (die
->sect_off
));
15224 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15225 TYPE_CPLUS_DYNAMIC (type
) = 1;
15230 /* Create the vector of member function fields, and attach it to the type. */
15233 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15234 struct dwarf2_cu
*cu
)
15236 if (cu
->language
== language_ada
)
15237 error (_("unexpected member functions in Ada type"));
15239 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15240 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15242 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15244 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15246 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15247 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15249 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15250 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15251 fn_flp
->fn_fields
= (struct fn_field
*)
15252 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15254 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15255 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15258 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15261 /* Returns non-zero if NAME is the name of a vtable member in CU's
15262 language, zero otherwise. */
15264 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15266 static const char vptr
[] = "_vptr";
15268 /* Look for the C++ form of the vtable. */
15269 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15275 /* GCC outputs unnamed structures that are really pointers to member
15276 functions, with the ABI-specified layout. If TYPE describes
15277 such a structure, smash it into a member function type.
15279 GCC shouldn't do this; it should just output pointer to member DIEs.
15280 This is GCC PR debug/28767. */
15283 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15285 struct type
*pfn_type
, *self_type
, *new_type
;
15287 /* Check for a structure with no name and two children. */
15288 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15291 /* Check for __pfn and __delta members. */
15292 if (TYPE_FIELD_NAME (type
, 0) == NULL
15293 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15294 || TYPE_FIELD_NAME (type
, 1) == NULL
15295 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15298 /* Find the type of the method. */
15299 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15300 if (pfn_type
== NULL
15301 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15302 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15305 /* Look for the "this" argument. */
15306 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15307 if (TYPE_NFIELDS (pfn_type
) == 0
15308 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15309 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15312 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15313 new_type
= alloc_type (objfile
);
15314 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15315 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15316 TYPE_VARARGS (pfn_type
));
15317 smash_to_methodptr_type (type
, new_type
);
15320 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15321 appropriate error checking and issuing complaints if there is a
15325 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15327 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15329 if (attr
== nullptr)
15332 if (!attr
->form_is_constant ())
15334 complaint (_("DW_AT_alignment must have constant form"
15335 " - DIE at %s [in module %s]"),
15336 sect_offset_str (die
->sect_off
),
15337 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15342 if (attr
->form
== DW_FORM_sdata
)
15344 LONGEST val
= DW_SND (attr
);
15347 complaint (_("DW_AT_alignment value must not be negative"
15348 " - DIE at %s [in module %s]"),
15349 sect_offset_str (die
->sect_off
),
15350 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15356 align
= DW_UNSND (attr
);
15360 complaint (_("DW_AT_alignment value must not be zero"
15361 " - DIE at %s [in module %s]"),
15362 sect_offset_str (die
->sect_off
),
15363 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15366 if ((align
& (align
- 1)) != 0)
15368 complaint (_("DW_AT_alignment value must be a power of 2"
15369 " - DIE at %s [in module %s]"),
15370 sect_offset_str (die
->sect_off
),
15371 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15378 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15379 the alignment for TYPE. */
15382 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15385 if (!set_type_align (type
, get_alignment (cu
, die
)))
15386 complaint (_("DW_AT_alignment value too large"
15387 " - DIE at %s [in module %s]"),
15388 sect_offset_str (die
->sect_off
),
15389 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15392 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15393 constant for a type, according to DWARF5 spec, Table 5.5. */
15396 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15401 case DW_CC_pass_by_reference
:
15402 case DW_CC_pass_by_value
:
15406 complaint (_("unrecognized DW_AT_calling_convention value "
15407 "(%s) for a type"), pulongest (value
));
15412 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15413 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15414 also according to GNU-specific values (see include/dwarf2.h). */
15417 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15422 case DW_CC_program
:
15426 case DW_CC_GNU_renesas_sh
:
15427 case DW_CC_GNU_borland_fastcall_i386
:
15428 case DW_CC_GDB_IBM_OpenCL
:
15432 complaint (_("unrecognized DW_AT_calling_convention value "
15433 "(%s) for a subroutine"), pulongest (value
));
15438 /* Called when we find the DIE that starts a structure or union scope
15439 (definition) to create a type for the structure or union. Fill in
15440 the type's name and general properties; the members will not be
15441 processed until process_structure_scope. A symbol table entry for
15442 the type will also not be done until process_structure_scope (assuming
15443 the type has a name).
15445 NOTE: we need to call these functions regardless of whether or not the
15446 DIE has a DW_AT_name attribute, since it might be an anonymous
15447 structure or union. This gets the type entered into our set of
15448 user defined types. */
15450 static struct type
*
15451 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15453 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15455 struct attribute
*attr
;
15458 /* If the definition of this type lives in .debug_types, read that type.
15459 Don't follow DW_AT_specification though, that will take us back up
15460 the chain and we want to go down. */
15461 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15462 if (attr
!= nullptr)
15464 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15466 /* The type's CU may not be the same as CU.
15467 Ensure TYPE is recorded with CU in die_type_hash. */
15468 return set_die_type (die
, type
, cu
);
15471 type
= alloc_type (objfile
);
15472 INIT_CPLUS_SPECIFIC (type
);
15474 name
= dwarf2_name (die
, cu
);
15477 if (cu
->language
== language_cplus
15478 || cu
->language
== language_d
15479 || cu
->language
== language_rust
)
15481 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15483 /* dwarf2_full_name might have already finished building the DIE's
15484 type. If so, there is no need to continue. */
15485 if (get_die_type (die
, cu
) != NULL
)
15486 return get_die_type (die
, cu
);
15488 TYPE_NAME (type
) = full_name
;
15492 /* The name is already allocated along with this objfile, so
15493 we don't need to duplicate it for the type. */
15494 TYPE_NAME (type
) = name
;
15498 if (die
->tag
== DW_TAG_structure_type
)
15500 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15502 else if (die
->tag
== DW_TAG_union_type
)
15504 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15506 else if (die
->tag
== DW_TAG_variant_part
)
15508 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15509 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15513 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15516 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15517 TYPE_DECLARED_CLASS (type
) = 1;
15519 /* Store the calling convention in the type if it's available in
15520 the die. Otherwise the calling convention remains set to
15521 the default value DW_CC_normal. */
15522 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15523 if (attr
!= nullptr
15524 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15526 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15527 TYPE_CPLUS_CALLING_CONVENTION (type
)
15528 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15531 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15532 if (attr
!= nullptr)
15534 if (attr
->form_is_constant ())
15535 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15538 /* For the moment, dynamic type sizes are not supported
15539 by GDB's struct type. The actual size is determined
15540 on-demand when resolving the type of a given object,
15541 so set the type's length to zero for now. Otherwise,
15542 we record an expression as the length, and that expression
15543 could lead to a very large value, which could eventually
15544 lead to us trying to allocate that much memory when creating
15545 a value of that type. */
15546 TYPE_LENGTH (type
) = 0;
15551 TYPE_LENGTH (type
) = 0;
15554 maybe_set_alignment (cu
, die
, type
);
15556 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15558 /* ICC<14 does not output the required DW_AT_declaration on
15559 incomplete types, but gives them a size of zero. */
15560 TYPE_STUB (type
) = 1;
15563 TYPE_STUB_SUPPORTED (type
) = 1;
15565 if (die_is_declaration (die
, cu
))
15566 TYPE_STUB (type
) = 1;
15567 else if (attr
== NULL
&& die
->child
== NULL
15568 && producer_is_realview (cu
->producer
))
15569 /* RealView does not output the required DW_AT_declaration
15570 on incomplete types. */
15571 TYPE_STUB (type
) = 1;
15573 /* We need to add the type field to the die immediately so we don't
15574 infinitely recurse when dealing with pointers to the structure
15575 type within the structure itself. */
15576 set_die_type (die
, type
, cu
);
15578 /* set_die_type should be already done. */
15579 set_descriptive_type (type
, die
, cu
);
15584 /* A helper for process_structure_scope that handles a single member
15588 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15589 struct field_info
*fi
,
15590 std::vector
<struct symbol
*> *template_args
,
15591 struct dwarf2_cu
*cu
)
15593 if (child_die
->tag
== DW_TAG_member
15594 || child_die
->tag
== DW_TAG_variable
15595 || child_die
->tag
== DW_TAG_variant_part
)
15597 /* NOTE: carlton/2002-11-05: A C++ static data member
15598 should be a DW_TAG_member that is a declaration, but
15599 all versions of G++ as of this writing (so through at
15600 least 3.2.1) incorrectly generate DW_TAG_variable
15601 tags for them instead. */
15602 dwarf2_add_field (fi
, child_die
, cu
);
15604 else if (child_die
->tag
== DW_TAG_subprogram
)
15606 /* Rust doesn't have member functions in the C++ sense.
15607 However, it does emit ordinary functions as children
15608 of a struct DIE. */
15609 if (cu
->language
== language_rust
)
15610 read_func_scope (child_die
, cu
);
15613 /* C++ member function. */
15614 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15617 else if (child_die
->tag
== DW_TAG_inheritance
)
15619 /* C++ base class field. */
15620 dwarf2_add_field (fi
, child_die
, cu
);
15622 else if (type_can_define_types (child_die
))
15623 dwarf2_add_type_defn (fi
, child_die
, cu
);
15624 else if (child_die
->tag
== DW_TAG_template_type_param
15625 || child_die
->tag
== DW_TAG_template_value_param
)
15627 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15630 template_args
->push_back (arg
);
15632 else if (child_die
->tag
== DW_TAG_variant
)
15634 /* In a variant we want to get the discriminant and also add a
15635 field for our sole member child. */
15636 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15638 for (die_info
*variant_child
= child_die
->child
;
15639 variant_child
!= NULL
;
15640 variant_child
= sibling_die (variant_child
))
15642 if (variant_child
->tag
== DW_TAG_member
)
15644 handle_struct_member_die (variant_child
, type
, fi
,
15645 template_args
, cu
);
15646 /* Only handle the one. */
15651 /* We don't handle this but we might as well report it if we see
15653 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15654 complaint (_("DW_AT_discr_list is not supported yet"
15655 " - DIE at %s [in module %s]"),
15656 sect_offset_str (child_die
->sect_off
),
15657 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15659 /* The first field was just added, so we can stash the
15660 discriminant there. */
15661 gdb_assert (!fi
->fields
.empty ());
15663 fi
->fields
.back ().variant
.default_branch
= true;
15665 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15669 /* Finish creating a structure or union type, including filling in
15670 its members and creating a symbol for it. */
15673 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15675 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15676 struct die_info
*child_die
;
15679 type
= get_die_type (die
, cu
);
15681 type
= read_structure_type (die
, cu
);
15683 /* When reading a DW_TAG_variant_part, we need to notice when we
15684 read the discriminant member, so we can record it later in the
15685 discriminant_info. */
15686 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15687 sect_offset discr_offset
{};
15688 bool has_template_parameters
= false;
15690 if (is_variant_part
)
15692 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15695 /* Maybe it's a univariant form, an extension we support.
15696 In this case arrange not to check the offset. */
15697 is_variant_part
= false;
15699 else if (discr
->form_is_ref ())
15701 struct dwarf2_cu
*target_cu
= cu
;
15702 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15704 discr_offset
= target_die
->sect_off
;
15708 complaint (_("DW_AT_discr does not have DIE reference form"
15709 " - DIE at %s [in module %s]"),
15710 sect_offset_str (die
->sect_off
),
15711 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15712 is_variant_part
= false;
15716 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15718 struct field_info fi
;
15719 std::vector
<struct symbol
*> template_args
;
15721 child_die
= die
->child
;
15723 while (child_die
&& child_die
->tag
)
15725 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15727 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15728 fi
.fields
.back ().variant
.is_discriminant
= true;
15730 child_die
= sibling_die (child_die
);
15733 /* Attach template arguments to type. */
15734 if (!template_args
.empty ())
15736 has_template_parameters
= true;
15737 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15738 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15739 TYPE_TEMPLATE_ARGUMENTS (type
)
15740 = XOBNEWVEC (&objfile
->objfile_obstack
,
15742 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15743 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15744 template_args
.data (),
15745 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15746 * sizeof (struct symbol
*)));
15749 /* Attach fields and member functions to the type. */
15751 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15752 if (!fi
.fnfieldlists
.empty ())
15754 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15756 /* Get the type which refers to the base class (possibly this
15757 class itself) which contains the vtable pointer for the current
15758 class from the DW_AT_containing_type attribute. This use of
15759 DW_AT_containing_type is a GNU extension. */
15761 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15763 struct type
*t
= die_containing_type (die
, cu
);
15765 set_type_vptr_basetype (type
, t
);
15770 /* Our own class provides vtbl ptr. */
15771 for (i
= TYPE_NFIELDS (t
) - 1;
15772 i
>= TYPE_N_BASECLASSES (t
);
15775 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15777 if (is_vtable_name (fieldname
, cu
))
15779 set_type_vptr_fieldno (type
, i
);
15784 /* Complain if virtual function table field not found. */
15785 if (i
< TYPE_N_BASECLASSES (t
))
15786 complaint (_("virtual function table pointer "
15787 "not found when defining class '%s'"),
15788 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15792 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15795 else if (cu
->producer
15796 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15798 /* The IBM XLC compiler does not provide direct indication
15799 of the containing type, but the vtable pointer is
15800 always named __vfp. */
15804 for (i
= TYPE_NFIELDS (type
) - 1;
15805 i
>= TYPE_N_BASECLASSES (type
);
15808 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15810 set_type_vptr_fieldno (type
, i
);
15811 set_type_vptr_basetype (type
, type
);
15818 /* Copy fi.typedef_field_list linked list elements content into the
15819 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15820 if (!fi
.typedef_field_list
.empty ())
15822 int count
= fi
.typedef_field_list
.size ();
15824 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15825 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15826 = ((struct decl_field
*)
15828 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15829 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15831 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15832 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15835 /* Copy fi.nested_types_list linked list elements content into the
15836 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15837 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15839 int count
= fi
.nested_types_list
.size ();
15841 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15842 TYPE_NESTED_TYPES_ARRAY (type
)
15843 = ((struct decl_field
*)
15844 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15845 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15847 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15848 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15852 quirk_gcc_member_function_pointer (type
, objfile
);
15853 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15854 cu
->rust_unions
.push_back (type
);
15856 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15857 snapshots) has been known to create a die giving a declaration
15858 for a class that has, as a child, a die giving a definition for a
15859 nested class. So we have to process our children even if the
15860 current die is a declaration. Normally, of course, a declaration
15861 won't have any children at all. */
15863 child_die
= die
->child
;
15865 while (child_die
!= NULL
&& child_die
->tag
)
15867 if (child_die
->tag
== DW_TAG_member
15868 || child_die
->tag
== DW_TAG_variable
15869 || child_die
->tag
== DW_TAG_inheritance
15870 || child_die
->tag
== DW_TAG_template_value_param
15871 || child_die
->tag
== DW_TAG_template_type_param
)
15876 process_die (child_die
, cu
);
15878 child_die
= sibling_die (child_die
);
15881 /* Do not consider external references. According to the DWARF standard,
15882 these DIEs are identified by the fact that they have no byte_size
15883 attribute, and a declaration attribute. */
15884 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15885 || !die_is_declaration (die
, cu
))
15887 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15889 if (has_template_parameters
)
15891 struct symtab
*symtab
;
15892 if (sym
!= nullptr)
15893 symtab
= symbol_symtab (sym
);
15894 else if (cu
->line_header
!= nullptr)
15896 /* Any related symtab will do. */
15898 = cu
->line_header
->file_names ()[0].symtab
;
15903 complaint (_("could not find suitable "
15904 "symtab for template parameter"
15905 " - DIE at %s [in module %s]"),
15906 sect_offset_str (die
->sect_off
),
15907 objfile_name (objfile
));
15910 if (symtab
!= nullptr)
15912 /* Make sure that the symtab is set on the new symbols.
15913 Even though they don't appear in this symtab directly,
15914 other parts of gdb assume that symbols do, and this is
15915 reasonably true. */
15916 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15917 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15923 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
15924 update TYPE using some information only available in DIE's children. */
15927 update_enumeration_type_from_children (struct die_info
*die
,
15929 struct dwarf2_cu
*cu
)
15931 struct die_info
*child_die
;
15932 int unsigned_enum
= 1;
15936 auto_obstack obstack
;
15938 for (child_die
= die
->child
;
15939 child_die
!= NULL
&& child_die
->tag
;
15940 child_die
= sibling_die (child_die
))
15942 struct attribute
*attr
;
15944 const gdb_byte
*bytes
;
15945 struct dwarf2_locexpr_baton
*baton
;
15948 if (child_die
->tag
!= DW_TAG_enumerator
)
15951 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15955 name
= dwarf2_name (child_die
, cu
);
15957 name
= "<anonymous enumerator>";
15959 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15960 &value
, &bytes
, &baton
);
15966 else if ((mask
& value
) != 0)
15971 /* If we already know that the enum type is neither unsigned, nor
15972 a flag type, no need to look at the rest of the enumerates. */
15973 if (!unsigned_enum
&& !flag_enum
)
15978 TYPE_UNSIGNED (type
) = 1;
15980 TYPE_FLAG_ENUM (type
) = 1;
15983 /* Given a DW_AT_enumeration_type die, set its type. We do not
15984 complete the type's fields yet, or create any symbols. */
15986 static struct type
*
15987 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15989 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15991 struct attribute
*attr
;
15994 /* If the definition of this type lives in .debug_types, read that type.
15995 Don't follow DW_AT_specification though, that will take us back up
15996 the chain and we want to go down. */
15997 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15998 if (attr
!= nullptr)
16000 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16002 /* The type's CU may not be the same as CU.
16003 Ensure TYPE is recorded with CU in die_type_hash. */
16004 return set_die_type (die
, type
, cu
);
16007 type
= alloc_type (objfile
);
16009 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16010 name
= dwarf2_full_name (NULL
, die
, cu
);
16012 TYPE_NAME (type
) = name
;
16014 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16017 struct type
*underlying_type
= die_type (die
, cu
);
16019 TYPE_TARGET_TYPE (type
) = underlying_type
;
16022 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16023 if (attr
!= nullptr)
16025 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16029 TYPE_LENGTH (type
) = 0;
16032 maybe_set_alignment (cu
, die
, type
);
16034 /* The enumeration DIE can be incomplete. In Ada, any type can be
16035 declared as private in the package spec, and then defined only
16036 inside the package body. Such types are known as Taft Amendment
16037 Types. When another package uses such a type, an incomplete DIE
16038 may be generated by the compiler. */
16039 if (die_is_declaration (die
, cu
))
16040 TYPE_STUB (type
) = 1;
16042 /* Finish the creation of this type by using the enum's children.
16043 We must call this even when the underlying type has been provided
16044 so that we can determine if we're looking at a "flag" enum. */
16045 update_enumeration_type_from_children (die
, type
, cu
);
16047 /* If this type has an underlying type that is not a stub, then we
16048 may use its attributes. We always use the "unsigned" attribute
16049 in this situation, because ordinarily we guess whether the type
16050 is unsigned -- but the guess can be wrong and the underlying type
16051 can tell us the reality. However, we defer to a local size
16052 attribute if one exists, because this lets the compiler override
16053 the underlying type if needed. */
16054 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16056 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16057 if (TYPE_LENGTH (type
) == 0)
16058 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16059 if (TYPE_RAW_ALIGN (type
) == 0
16060 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16061 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16064 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16066 return set_die_type (die
, type
, cu
);
16069 /* Given a pointer to a die which begins an enumeration, process all
16070 the dies that define the members of the enumeration, and create the
16071 symbol for the enumeration type.
16073 NOTE: We reverse the order of the element list. */
16076 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16078 struct type
*this_type
;
16080 this_type
= get_die_type (die
, cu
);
16081 if (this_type
== NULL
)
16082 this_type
= read_enumeration_type (die
, cu
);
16084 if (die
->child
!= NULL
)
16086 struct die_info
*child_die
;
16087 struct symbol
*sym
;
16088 std::vector
<struct field
> fields
;
16091 child_die
= die
->child
;
16092 while (child_die
&& child_die
->tag
)
16094 if (child_die
->tag
!= DW_TAG_enumerator
)
16096 process_die (child_die
, cu
);
16100 name
= dwarf2_name (child_die
, cu
);
16103 sym
= new_symbol (child_die
, this_type
, cu
);
16105 fields
.emplace_back ();
16106 struct field
&field
= fields
.back ();
16108 FIELD_NAME (field
) = sym
->linkage_name ();
16109 FIELD_TYPE (field
) = NULL
;
16110 SET_FIELD_ENUMVAL (field
, SYMBOL_VALUE (sym
));
16111 FIELD_BITSIZE (field
) = 0;
16115 child_die
= sibling_die (child_die
);
16118 if (!fields
.empty ())
16120 TYPE_NFIELDS (this_type
) = fields
.size ();
16121 TYPE_FIELDS (this_type
) = (struct field
*)
16122 TYPE_ALLOC (this_type
, sizeof (struct field
) * fields
.size ());
16123 memcpy (TYPE_FIELDS (this_type
), fields
.data (),
16124 sizeof (struct field
) * fields
.size ());
16128 /* If we are reading an enum from a .debug_types unit, and the enum
16129 is a declaration, and the enum is not the signatured type in the
16130 unit, then we do not want to add a symbol for it. Adding a
16131 symbol would in some cases obscure the true definition of the
16132 enum, giving users an incomplete type when the definition is
16133 actually available. Note that we do not want to do this for all
16134 enums which are just declarations, because C++0x allows forward
16135 enum declarations. */
16136 if (cu
->per_cu
->is_debug_types
16137 && die_is_declaration (die
, cu
))
16139 struct signatured_type
*sig_type
;
16141 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16142 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16143 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16147 new_symbol (die
, this_type
, cu
);
16150 /* Extract all information from a DW_TAG_array_type DIE and put it in
16151 the DIE's type field. For now, this only handles one dimensional
16154 static struct type
*
16155 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16157 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16158 struct die_info
*child_die
;
16160 struct type
*element_type
, *range_type
, *index_type
;
16161 struct attribute
*attr
;
16163 struct dynamic_prop
*byte_stride_prop
= NULL
;
16164 unsigned int bit_stride
= 0;
16166 element_type
= die_type (die
, cu
);
16168 /* The die_type call above may have already set the type for this DIE. */
16169 type
= get_die_type (die
, cu
);
16173 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16177 struct type
*prop_type
16178 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
16181 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16182 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16186 complaint (_("unable to read array DW_AT_byte_stride "
16187 " - DIE at %s [in module %s]"),
16188 sect_offset_str (die
->sect_off
),
16189 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16190 /* Ignore this attribute. We will likely not be able to print
16191 arrays of this type correctly, but there is little we can do
16192 to help if we cannot read the attribute's value. */
16193 byte_stride_prop
= NULL
;
16197 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16199 bit_stride
= DW_UNSND (attr
);
16201 /* Irix 6.2 native cc creates array types without children for
16202 arrays with unspecified length. */
16203 if (die
->child
== NULL
)
16205 index_type
= objfile_type (objfile
)->builtin_int
;
16206 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16207 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16208 byte_stride_prop
, bit_stride
);
16209 return set_die_type (die
, type
, cu
);
16212 std::vector
<struct type
*> range_types
;
16213 child_die
= die
->child
;
16214 while (child_die
&& child_die
->tag
)
16216 if (child_die
->tag
== DW_TAG_subrange_type
)
16218 struct type
*child_type
= read_type_die (child_die
, cu
);
16220 if (child_type
!= NULL
)
16222 /* The range type was succesfully read. Save it for the
16223 array type creation. */
16224 range_types
.push_back (child_type
);
16227 child_die
= sibling_die (child_die
);
16230 /* Dwarf2 dimensions are output from left to right, create the
16231 necessary array types in backwards order. */
16233 type
= element_type
;
16235 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16239 while (i
< range_types
.size ())
16240 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16241 byte_stride_prop
, bit_stride
);
16245 size_t ndim
= range_types
.size ();
16247 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16248 byte_stride_prop
, bit_stride
);
16251 /* Understand Dwarf2 support for vector types (like they occur on
16252 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16253 array type. This is not part of the Dwarf2/3 standard yet, but a
16254 custom vendor extension. The main difference between a regular
16255 array and the vector variant is that vectors are passed by value
16257 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16258 if (attr
!= nullptr)
16259 make_vector_type (type
);
16261 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16262 implementation may choose to implement triple vectors using this
16264 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16265 if (attr
!= nullptr)
16267 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16268 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16270 complaint (_("DW_AT_byte_size for array type smaller "
16271 "than the total size of elements"));
16274 name
= dwarf2_name (die
, cu
);
16276 TYPE_NAME (type
) = name
;
16278 maybe_set_alignment (cu
, die
, type
);
16280 /* Install the type in the die. */
16281 set_die_type (die
, type
, cu
);
16283 /* set_die_type should be already done. */
16284 set_descriptive_type (type
, die
, cu
);
16289 static enum dwarf_array_dim_ordering
16290 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16292 struct attribute
*attr
;
16294 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16296 if (attr
!= nullptr)
16297 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16299 /* GNU F77 is a special case, as at 08/2004 array type info is the
16300 opposite order to the dwarf2 specification, but data is still
16301 laid out as per normal fortran.
16303 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16304 version checking. */
16306 if (cu
->language
== language_fortran
16307 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16309 return DW_ORD_row_major
;
16312 switch (cu
->language_defn
->la_array_ordering
)
16314 case array_column_major
:
16315 return DW_ORD_col_major
;
16316 case array_row_major
:
16318 return DW_ORD_row_major
;
16322 /* Extract all information from a DW_TAG_set_type DIE and put it in
16323 the DIE's type field. */
16325 static struct type
*
16326 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16328 struct type
*domain_type
, *set_type
;
16329 struct attribute
*attr
;
16331 domain_type
= die_type (die
, cu
);
16333 /* The die_type call above may have already set the type for this DIE. */
16334 set_type
= get_die_type (die
, cu
);
16338 set_type
= create_set_type (NULL
, domain_type
);
16340 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16341 if (attr
!= nullptr)
16342 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16344 maybe_set_alignment (cu
, die
, set_type
);
16346 return set_die_type (die
, set_type
, cu
);
16349 /* A helper for read_common_block that creates a locexpr baton.
16350 SYM is the symbol which we are marking as computed.
16351 COMMON_DIE is the DIE for the common block.
16352 COMMON_LOC is the location expression attribute for the common
16354 MEMBER_LOC is the location expression attribute for the particular
16355 member of the common block that we are processing.
16356 CU is the CU from which the above come. */
16359 mark_common_block_symbol_computed (struct symbol
*sym
,
16360 struct die_info
*common_die
,
16361 struct attribute
*common_loc
,
16362 struct attribute
*member_loc
,
16363 struct dwarf2_cu
*cu
)
16365 struct dwarf2_per_objfile
*dwarf2_per_objfile
16366 = cu
->per_cu
->dwarf2_per_objfile
;
16367 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16368 struct dwarf2_locexpr_baton
*baton
;
16370 unsigned int cu_off
;
16371 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16372 LONGEST offset
= 0;
16374 gdb_assert (common_loc
&& member_loc
);
16375 gdb_assert (common_loc
->form_is_block ());
16376 gdb_assert (member_loc
->form_is_block ()
16377 || member_loc
->form_is_constant ());
16379 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16380 baton
->per_cu
= cu
->per_cu
;
16381 gdb_assert (baton
->per_cu
);
16383 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16385 if (member_loc
->form_is_constant ())
16387 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16388 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16391 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16393 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16396 *ptr
++ = DW_OP_call4
;
16397 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16398 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16401 if (member_loc
->form_is_constant ())
16403 *ptr
++ = DW_OP_addr
;
16404 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16405 ptr
+= cu
->header
.addr_size
;
16409 /* We have to copy the data here, because DW_OP_call4 will only
16410 use a DW_AT_location attribute. */
16411 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16412 ptr
+= DW_BLOCK (member_loc
)->size
;
16415 *ptr
++ = DW_OP_plus
;
16416 gdb_assert (ptr
- baton
->data
== baton
->size
);
16418 SYMBOL_LOCATION_BATON (sym
) = baton
;
16419 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16422 /* Create appropriate locally-scoped variables for all the
16423 DW_TAG_common_block entries. Also create a struct common_block
16424 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16425 is used to separate the common blocks name namespace from regular
16429 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16431 struct attribute
*attr
;
16433 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16434 if (attr
!= nullptr)
16436 /* Support the .debug_loc offsets. */
16437 if (attr
->form_is_block ())
16441 else if (attr
->form_is_section_offset ())
16443 dwarf2_complex_location_expr_complaint ();
16448 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16449 "common block member");
16454 if (die
->child
!= NULL
)
16456 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16457 struct die_info
*child_die
;
16458 size_t n_entries
= 0, size
;
16459 struct common_block
*common_block
;
16460 struct symbol
*sym
;
16462 for (child_die
= die
->child
;
16463 child_die
&& child_die
->tag
;
16464 child_die
= sibling_die (child_die
))
16467 size
= (sizeof (struct common_block
)
16468 + (n_entries
- 1) * sizeof (struct symbol
*));
16470 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16472 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16473 common_block
->n_entries
= 0;
16475 for (child_die
= die
->child
;
16476 child_die
&& child_die
->tag
;
16477 child_die
= sibling_die (child_die
))
16479 /* Create the symbol in the DW_TAG_common_block block in the current
16481 sym
= new_symbol (child_die
, NULL
, cu
);
16484 struct attribute
*member_loc
;
16486 common_block
->contents
[common_block
->n_entries
++] = sym
;
16488 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16492 /* GDB has handled this for a long time, but it is
16493 not specified by DWARF. It seems to have been
16494 emitted by gfortran at least as recently as:
16495 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16496 complaint (_("Variable in common block has "
16497 "DW_AT_data_member_location "
16498 "- DIE at %s [in module %s]"),
16499 sect_offset_str (child_die
->sect_off
),
16500 objfile_name (objfile
));
16502 if (member_loc
->form_is_section_offset ())
16503 dwarf2_complex_location_expr_complaint ();
16504 else if (member_loc
->form_is_constant ()
16505 || member_loc
->form_is_block ())
16507 if (attr
!= nullptr)
16508 mark_common_block_symbol_computed (sym
, die
, attr
,
16512 dwarf2_complex_location_expr_complaint ();
16517 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16518 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16522 /* Create a type for a C++ namespace. */
16524 static struct type
*
16525 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16527 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16528 const char *previous_prefix
, *name
;
16532 /* For extensions, reuse the type of the original namespace. */
16533 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16535 struct die_info
*ext_die
;
16536 struct dwarf2_cu
*ext_cu
= cu
;
16538 ext_die
= dwarf2_extension (die
, &ext_cu
);
16539 type
= read_type_die (ext_die
, ext_cu
);
16541 /* EXT_CU may not be the same as CU.
16542 Ensure TYPE is recorded with CU in die_type_hash. */
16543 return set_die_type (die
, type
, cu
);
16546 name
= namespace_name (die
, &is_anonymous
, cu
);
16548 /* Now build the name of the current namespace. */
16550 previous_prefix
= determine_prefix (die
, cu
);
16551 if (previous_prefix
[0] != '\0')
16552 name
= typename_concat (&objfile
->objfile_obstack
,
16553 previous_prefix
, name
, 0, cu
);
16555 /* Create the type. */
16556 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16558 return set_die_type (die
, type
, cu
);
16561 /* Read a namespace scope. */
16564 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16566 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16569 /* Add a symbol associated to this if we haven't seen the namespace
16570 before. Also, add a using directive if it's an anonymous
16573 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16577 type
= read_type_die (die
, cu
);
16578 new_symbol (die
, type
, cu
);
16580 namespace_name (die
, &is_anonymous
, cu
);
16583 const char *previous_prefix
= determine_prefix (die
, cu
);
16585 std::vector
<const char *> excludes
;
16586 add_using_directive (using_directives (cu
),
16587 previous_prefix
, TYPE_NAME (type
), NULL
,
16588 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16592 if (die
->child
!= NULL
)
16594 struct die_info
*child_die
= die
->child
;
16596 while (child_die
&& child_die
->tag
)
16598 process_die (child_die
, cu
);
16599 child_die
= sibling_die (child_die
);
16604 /* Read a Fortran module as type. This DIE can be only a declaration used for
16605 imported module. Still we need that type as local Fortran "use ... only"
16606 declaration imports depend on the created type in determine_prefix. */
16608 static struct type
*
16609 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16611 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16612 const char *module_name
;
16615 module_name
= dwarf2_name (die
, cu
);
16616 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16618 return set_die_type (die
, type
, cu
);
16621 /* Read a Fortran module. */
16624 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16626 struct die_info
*child_die
= die
->child
;
16629 type
= read_type_die (die
, cu
);
16630 new_symbol (die
, type
, cu
);
16632 while (child_die
&& child_die
->tag
)
16634 process_die (child_die
, cu
);
16635 child_die
= sibling_die (child_die
);
16639 /* Return the name of the namespace represented by DIE. Set
16640 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16643 static const char *
16644 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16646 struct die_info
*current_die
;
16647 const char *name
= NULL
;
16649 /* Loop through the extensions until we find a name. */
16651 for (current_die
= die
;
16652 current_die
!= NULL
;
16653 current_die
= dwarf2_extension (die
, &cu
))
16655 /* We don't use dwarf2_name here so that we can detect the absence
16656 of a name -> anonymous namespace. */
16657 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16663 /* Is it an anonymous namespace? */
16665 *is_anonymous
= (name
== NULL
);
16667 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16672 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16673 the user defined type vector. */
16675 static struct type
*
16676 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16678 struct gdbarch
*gdbarch
16679 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16680 struct comp_unit_head
*cu_header
= &cu
->header
;
16682 struct attribute
*attr_byte_size
;
16683 struct attribute
*attr_address_class
;
16684 int byte_size
, addr_class
;
16685 struct type
*target_type
;
16687 target_type
= die_type (die
, cu
);
16689 /* The die_type call above may have already set the type for this DIE. */
16690 type
= get_die_type (die
, cu
);
16694 type
= lookup_pointer_type (target_type
);
16696 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16697 if (attr_byte_size
)
16698 byte_size
= DW_UNSND (attr_byte_size
);
16700 byte_size
= cu_header
->addr_size
;
16702 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16703 if (attr_address_class
)
16704 addr_class
= DW_UNSND (attr_address_class
);
16706 addr_class
= DW_ADDR_none
;
16708 ULONGEST alignment
= get_alignment (cu
, die
);
16710 /* If the pointer size, alignment, or address class is different
16711 than the default, create a type variant marked as such and set
16712 the length accordingly. */
16713 if (TYPE_LENGTH (type
) != byte_size
16714 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16715 && alignment
!= TYPE_RAW_ALIGN (type
))
16716 || addr_class
!= DW_ADDR_none
)
16718 if (gdbarch_address_class_type_flags_p (gdbarch
))
16722 type_flags
= gdbarch_address_class_type_flags
16723 (gdbarch
, byte_size
, addr_class
);
16724 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16726 type
= make_type_with_address_space (type
, type_flags
);
16728 else if (TYPE_LENGTH (type
) != byte_size
)
16730 complaint (_("invalid pointer size %d"), byte_size
);
16732 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16734 complaint (_("Invalid DW_AT_alignment"
16735 " - DIE at %s [in module %s]"),
16736 sect_offset_str (die
->sect_off
),
16737 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16741 /* Should we also complain about unhandled address classes? */
16745 TYPE_LENGTH (type
) = byte_size
;
16746 set_type_align (type
, alignment
);
16747 return set_die_type (die
, type
, cu
);
16750 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16751 the user defined type vector. */
16753 static struct type
*
16754 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16757 struct type
*to_type
;
16758 struct type
*domain
;
16760 to_type
= die_type (die
, cu
);
16761 domain
= die_containing_type (die
, cu
);
16763 /* The calls above may have already set the type for this DIE. */
16764 type
= get_die_type (die
, cu
);
16768 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16769 type
= lookup_methodptr_type (to_type
);
16770 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16772 struct type
*new_type
16773 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16775 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16776 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16777 TYPE_VARARGS (to_type
));
16778 type
= lookup_methodptr_type (new_type
);
16781 type
= lookup_memberptr_type (to_type
, domain
);
16783 return set_die_type (die
, type
, cu
);
16786 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16787 the user defined type vector. */
16789 static struct type
*
16790 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16791 enum type_code refcode
)
16793 struct comp_unit_head
*cu_header
= &cu
->header
;
16794 struct type
*type
, *target_type
;
16795 struct attribute
*attr
;
16797 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16799 target_type
= die_type (die
, cu
);
16801 /* The die_type call above may have already set the type for this DIE. */
16802 type
= get_die_type (die
, cu
);
16806 type
= lookup_reference_type (target_type
, refcode
);
16807 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16808 if (attr
!= nullptr)
16810 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16814 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16816 maybe_set_alignment (cu
, die
, type
);
16817 return set_die_type (die
, type
, cu
);
16820 /* Add the given cv-qualifiers to the element type of the array. GCC
16821 outputs DWARF type qualifiers that apply to an array, not the
16822 element type. But GDB relies on the array element type to carry
16823 the cv-qualifiers. This mimics section 6.7.3 of the C99
16826 static struct type
*
16827 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16828 struct type
*base_type
, int cnst
, int voltl
)
16830 struct type
*el_type
, *inner_array
;
16832 base_type
= copy_type (base_type
);
16833 inner_array
= base_type
;
16835 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16837 TYPE_TARGET_TYPE (inner_array
) =
16838 copy_type (TYPE_TARGET_TYPE (inner_array
));
16839 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16842 el_type
= TYPE_TARGET_TYPE (inner_array
);
16843 cnst
|= TYPE_CONST (el_type
);
16844 voltl
|= TYPE_VOLATILE (el_type
);
16845 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16847 return set_die_type (die
, base_type
, cu
);
16850 static struct type
*
16851 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16853 struct type
*base_type
, *cv_type
;
16855 base_type
= die_type (die
, cu
);
16857 /* The die_type call above may have already set the type for this DIE. */
16858 cv_type
= get_die_type (die
, cu
);
16862 /* In case the const qualifier is applied to an array type, the element type
16863 is so qualified, not the array type (section 6.7.3 of C99). */
16864 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16865 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16867 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16868 return set_die_type (die
, cv_type
, cu
);
16871 static struct type
*
16872 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16874 struct type
*base_type
, *cv_type
;
16876 base_type
= die_type (die
, cu
);
16878 /* The die_type call above may have already set the type for this DIE. */
16879 cv_type
= get_die_type (die
, cu
);
16883 /* In case the volatile qualifier is applied to an array type, the
16884 element type is so qualified, not the array type (section 6.7.3
16886 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16887 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16889 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16890 return set_die_type (die
, cv_type
, cu
);
16893 /* Handle DW_TAG_restrict_type. */
16895 static struct type
*
16896 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16898 struct type
*base_type
, *cv_type
;
16900 base_type
= die_type (die
, cu
);
16902 /* The die_type call above may have already set the type for this DIE. */
16903 cv_type
= get_die_type (die
, cu
);
16907 cv_type
= make_restrict_type (base_type
);
16908 return set_die_type (die
, cv_type
, cu
);
16911 /* Handle DW_TAG_atomic_type. */
16913 static struct type
*
16914 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16916 struct type
*base_type
, *cv_type
;
16918 base_type
= die_type (die
, cu
);
16920 /* The die_type call above may have already set the type for this DIE. */
16921 cv_type
= get_die_type (die
, cu
);
16925 cv_type
= make_atomic_type (base_type
);
16926 return set_die_type (die
, cv_type
, cu
);
16929 /* Extract all information from a DW_TAG_string_type DIE and add to
16930 the user defined type vector. It isn't really a user defined type,
16931 but it behaves like one, with other DIE's using an AT_user_def_type
16932 attribute to reference it. */
16934 static struct type
*
16935 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16937 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16938 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16939 struct type
*type
, *range_type
, *index_type
, *char_type
;
16940 struct attribute
*attr
;
16941 struct dynamic_prop prop
;
16942 bool length_is_constant
= true;
16945 /* There are a couple of places where bit sizes might be made use of
16946 when parsing a DW_TAG_string_type, however, no producer that we know
16947 of make use of these. Handling bit sizes that are a multiple of the
16948 byte size is easy enough, but what about other bit sizes? Lets deal
16949 with that problem when we have to. Warn about these attributes being
16950 unsupported, then parse the type and ignore them like we always
16952 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16953 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16955 static bool warning_printed
= false;
16956 if (!warning_printed
)
16958 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16959 "currently supported on DW_TAG_string_type."));
16960 warning_printed
= true;
16964 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16965 if (attr
!= nullptr && !attr
->form_is_constant ())
16967 /* The string length describes the location at which the length of
16968 the string can be found. The size of the length field can be
16969 specified with one of the attributes below. */
16970 struct type
*prop_type
;
16971 struct attribute
*len
16972 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16973 if (len
== nullptr)
16974 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16975 if (len
!= nullptr && len
->form_is_constant ())
16977 /* Pass 0 as the default as we know this attribute is constant
16978 and the default value will not be returned. */
16979 LONGEST sz
= dwarf2_get_attr_constant_value (len
, 0);
16980 prop_type
= dwarf2_per_cu_int_type (cu
->per_cu
, sz
, true);
16984 /* If the size is not specified then we assume it is the size of
16985 an address on this target. */
16986 prop_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, true);
16989 /* Convert the attribute into a dynamic property. */
16990 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16993 length_is_constant
= false;
16995 else if (attr
!= nullptr)
16997 /* This DW_AT_string_length just contains the length with no
16998 indirection. There's no need to create a dynamic property in this
16999 case. Pass 0 for the default value as we know it will not be
17000 returned in this case. */
17001 length
= dwarf2_get_attr_constant_value (attr
, 0);
17003 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17005 /* We don't currently support non-constant byte sizes for strings. */
17006 length
= dwarf2_get_attr_constant_value (attr
, 1);
17010 /* Use 1 as a fallback length if we have nothing else. */
17014 index_type
= objfile_type (objfile
)->builtin_int
;
17015 if (length_is_constant
)
17016 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17019 struct dynamic_prop low_bound
;
17021 low_bound
.kind
= PROP_CONST
;
17022 low_bound
.data
.const_val
= 1;
17023 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
17025 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17026 type
= create_string_type (NULL
, char_type
, range_type
);
17028 return set_die_type (die
, type
, cu
);
17031 /* Assuming that DIE corresponds to a function, returns nonzero
17032 if the function is prototyped. */
17035 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17037 struct attribute
*attr
;
17039 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17040 if (attr
&& (DW_UNSND (attr
) != 0))
17043 /* The DWARF standard implies that the DW_AT_prototyped attribute
17044 is only meaningful for C, but the concept also extends to other
17045 languages that allow unprototyped functions (Eg: Objective C).
17046 For all other languages, assume that functions are always
17048 if (cu
->language
!= language_c
17049 && cu
->language
!= language_objc
17050 && cu
->language
!= language_opencl
)
17053 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17054 prototyped and unprototyped functions; default to prototyped,
17055 since that is more common in modern code (and RealView warns
17056 about unprototyped functions). */
17057 if (producer_is_realview (cu
->producer
))
17063 /* Handle DIES due to C code like:
17067 int (*funcp)(int a, long l);
17071 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17073 static struct type
*
17074 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17076 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17077 struct type
*type
; /* Type that this function returns. */
17078 struct type
*ftype
; /* Function that returns above type. */
17079 struct attribute
*attr
;
17081 type
= die_type (die
, cu
);
17083 /* The die_type call above may have already set the type for this DIE. */
17084 ftype
= get_die_type (die
, cu
);
17088 ftype
= lookup_function_type (type
);
17090 if (prototyped_function_p (die
, cu
))
17091 TYPE_PROTOTYPED (ftype
) = 1;
17093 /* Store the calling convention in the type if it's available in
17094 the subroutine die. Otherwise set the calling convention to
17095 the default value DW_CC_normal. */
17096 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17097 if (attr
!= nullptr
17098 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17099 TYPE_CALLING_CONVENTION (ftype
)
17100 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17101 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17102 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17104 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17106 /* Record whether the function returns normally to its caller or not
17107 if the DWARF producer set that information. */
17108 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17109 if (attr
&& (DW_UNSND (attr
) != 0))
17110 TYPE_NO_RETURN (ftype
) = 1;
17112 /* We need to add the subroutine type to the die immediately so
17113 we don't infinitely recurse when dealing with parameters
17114 declared as the same subroutine type. */
17115 set_die_type (die
, ftype
, cu
);
17117 if (die
->child
!= NULL
)
17119 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17120 struct die_info
*child_die
;
17121 int nparams
, iparams
;
17123 /* Count the number of parameters.
17124 FIXME: GDB currently ignores vararg functions, but knows about
17125 vararg member functions. */
17127 child_die
= die
->child
;
17128 while (child_die
&& child_die
->tag
)
17130 if (child_die
->tag
== DW_TAG_formal_parameter
)
17132 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17133 TYPE_VARARGS (ftype
) = 1;
17134 child_die
= sibling_die (child_die
);
17137 /* Allocate storage for parameters and fill them in. */
17138 TYPE_NFIELDS (ftype
) = nparams
;
17139 TYPE_FIELDS (ftype
) = (struct field
*)
17140 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17142 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17143 even if we error out during the parameters reading below. */
17144 for (iparams
= 0; iparams
< nparams
; iparams
++)
17145 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17148 child_die
= die
->child
;
17149 while (child_die
&& child_die
->tag
)
17151 if (child_die
->tag
== DW_TAG_formal_parameter
)
17153 struct type
*arg_type
;
17155 /* DWARF version 2 has no clean way to discern C++
17156 static and non-static member functions. G++ helps
17157 GDB by marking the first parameter for non-static
17158 member functions (which is the this pointer) as
17159 artificial. We pass this information to
17160 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17162 DWARF version 3 added DW_AT_object_pointer, which GCC
17163 4.5 does not yet generate. */
17164 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17165 if (attr
!= nullptr)
17166 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17168 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17169 arg_type
= die_type (child_die
, cu
);
17171 /* RealView does not mark THIS as const, which the testsuite
17172 expects. GCC marks THIS as const in method definitions,
17173 but not in the class specifications (GCC PR 43053). */
17174 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17175 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17178 struct dwarf2_cu
*arg_cu
= cu
;
17179 const char *name
= dwarf2_name (child_die
, cu
);
17181 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17182 if (attr
!= nullptr)
17184 /* If the compiler emits this, use it. */
17185 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17188 else if (name
&& strcmp (name
, "this") == 0)
17189 /* Function definitions will have the argument names. */
17191 else if (name
== NULL
&& iparams
== 0)
17192 /* Declarations may not have the names, so like
17193 elsewhere in GDB, assume an artificial first
17194 argument is "this". */
17198 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17202 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17205 child_die
= sibling_die (child_die
);
17212 static struct type
*
17213 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17215 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17216 const char *name
= NULL
;
17217 struct type
*this_type
, *target_type
;
17219 name
= dwarf2_full_name (NULL
, die
, cu
);
17220 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17221 TYPE_TARGET_STUB (this_type
) = 1;
17222 set_die_type (die
, this_type
, cu
);
17223 target_type
= die_type (die
, cu
);
17224 if (target_type
!= this_type
)
17225 TYPE_TARGET_TYPE (this_type
) = target_type
;
17228 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17229 spec and cause infinite loops in GDB. */
17230 complaint (_("Self-referential DW_TAG_typedef "
17231 "- DIE at %s [in module %s]"),
17232 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17233 TYPE_TARGET_TYPE (this_type
) = NULL
;
17238 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17239 (which may be different from NAME) to the architecture back-end to allow
17240 it to guess the correct format if necessary. */
17242 static struct type
*
17243 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17244 const char *name_hint
, enum bfd_endian byte_order
)
17246 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17247 const struct floatformat
**format
;
17250 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17252 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17254 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17259 /* Allocate an integer type of size BITS and name NAME. */
17261 static struct type
*
17262 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17263 int bits
, int unsigned_p
, const char *name
)
17267 /* Versions of Intel's C Compiler generate an integer type called "void"
17268 instead of using DW_TAG_unspecified_type. This has been seen on
17269 at least versions 14, 17, and 18. */
17270 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17271 && strcmp (name
, "void") == 0)
17272 type
= objfile_type (objfile
)->builtin_void
;
17274 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17279 /* Initialise and return a floating point type of size BITS suitable for
17280 use as a component of a complex number. The NAME_HINT is passed through
17281 when initialising the floating point type and is the name of the complex
17284 As DWARF doesn't currently provide an explicit name for the components
17285 of a complex number, but it can be helpful to have these components
17286 named, we try to select a suitable name based on the size of the
17288 static struct type
*
17289 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17290 struct objfile
*objfile
,
17291 int bits
, const char *name_hint
,
17292 enum bfd_endian byte_order
)
17294 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17295 struct type
*tt
= nullptr;
17297 /* Try to find a suitable floating point builtin type of size BITS.
17298 We're going to use the name of this type as the name for the complex
17299 target type that we are about to create. */
17300 switch (cu
->language
)
17302 case language_fortran
:
17306 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17309 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17311 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17313 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17321 tt
= builtin_type (gdbarch
)->builtin_float
;
17324 tt
= builtin_type (gdbarch
)->builtin_double
;
17326 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17328 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17334 /* If the type we found doesn't match the size we were looking for, then
17335 pretend we didn't find a type at all, the complex target type we
17336 create will then be nameless. */
17337 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17340 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17341 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17344 /* Find a representation of a given base type and install
17345 it in the TYPE field of the die. */
17347 static struct type
*
17348 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17350 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17352 struct attribute
*attr
;
17353 int encoding
= 0, bits
= 0;
17357 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17358 if (attr
!= nullptr)
17359 encoding
= DW_UNSND (attr
);
17360 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17361 if (attr
!= nullptr)
17362 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17363 name
= dwarf2_name (die
, cu
);
17365 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17367 arch
= get_objfile_arch (objfile
);
17368 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17370 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17373 int endianity
= DW_UNSND (attr
);
17378 byte_order
= BFD_ENDIAN_BIG
;
17380 case DW_END_little
:
17381 byte_order
= BFD_ENDIAN_LITTLE
;
17384 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17391 case DW_ATE_address
:
17392 /* Turn DW_ATE_address into a void * pointer. */
17393 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17394 type
= init_pointer_type (objfile
, bits
, name
, type
);
17396 case DW_ATE_boolean
:
17397 type
= init_boolean_type (objfile
, bits
, 1, name
);
17399 case DW_ATE_complex_float
:
17400 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17402 type
= init_complex_type (objfile
, name
, type
);
17404 case DW_ATE_decimal_float
:
17405 type
= init_decfloat_type (objfile
, bits
, name
);
17408 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17410 case DW_ATE_signed
:
17411 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17413 case DW_ATE_unsigned
:
17414 if (cu
->language
== language_fortran
17416 && startswith (name
, "character("))
17417 type
= init_character_type (objfile
, bits
, 1, name
);
17419 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17421 case DW_ATE_signed_char
:
17422 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17423 || cu
->language
== language_pascal
17424 || cu
->language
== language_fortran
)
17425 type
= init_character_type (objfile
, bits
, 0, name
);
17427 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17429 case DW_ATE_unsigned_char
:
17430 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17431 || cu
->language
== language_pascal
17432 || cu
->language
== language_fortran
17433 || cu
->language
== language_rust
)
17434 type
= init_character_type (objfile
, bits
, 1, name
);
17436 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17441 type
= builtin_type (arch
)->builtin_char16
;
17442 else if (bits
== 32)
17443 type
= builtin_type (arch
)->builtin_char32
;
17446 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17448 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17450 return set_die_type (die
, type
, cu
);
17455 complaint (_("unsupported DW_AT_encoding: '%s'"),
17456 dwarf_type_encoding_name (encoding
));
17457 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17461 if (name
&& strcmp (name
, "char") == 0)
17462 TYPE_NOSIGN (type
) = 1;
17464 maybe_set_alignment (cu
, die
, type
);
17466 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17468 return set_die_type (die
, type
, cu
);
17471 /* Parse dwarf attribute if it's a block, reference or constant and put the
17472 resulting value of the attribute into struct bound_prop.
17473 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17476 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17477 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17478 struct type
*default_type
)
17480 struct dwarf2_property_baton
*baton
;
17481 struct obstack
*obstack
17482 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17484 gdb_assert (default_type
!= NULL
);
17486 if (attr
== NULL
|| prop
== NULL
)
17489 if (attr
->form_is_block ())
17491 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17492 baton
->property_type
= default_type
;
17493 baton
->locexpr
.per_cu
= cu
->per_cu
;
17494 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17495 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17496 switch (attr
->name
)
17498 case DW_AT_string_length
:
17499 baton
->locexpr
.is_reference
= true;
17502 baton
->locexpr
.is_reference
= false;
17505 prop
->data
.baton
= baton
;
17506 prop
->kind
= PROP_LOCEXPR
;
17507 gdb_assert (prop
->data
.baton
!= NULL
);
17509 else if (attr
->form_is_ref ())
17511 struct dwarf2_cu
*target_cu
= cu
;
17512 struct die_info
*target_die
;
17513 struct attribute
*target_attr
;
17515 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17516 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17517 if (target_attr
== NULL
)
17518 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17520 if (target_attr
== NULL
)
17523 switch (target_attr
->name
)
17525 case DW_AT_location
:
17526 if (target_attr
->form_is_section_offset ())
17528 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17529 baton
->property_type
= die_type (target_die
, target_cu
);
17530 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17531 prop
->data
.baton
= baton
;
17532 prop
->kind
= PROP_LOCLIST
;
17533 gdb_assert (prop
->data
.baton
!= NULL
);
17535 else if (target_attr
->form_is_block ())
17537 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17538 baton
->property_type
= die_type (target_die
, target_cu
);
17539 baton
->locexpr
.per_cu
= cu
->per_cu
;
17540 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17541 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17542 baton
->locexpr
.is_reference
= true;
17543 prop
->data
.baton
= baton
;
17544 prop
->kind
= PROP_LOCEXPR
;
17545 gdb_assert (prop
->data
.baton
!= NULL
);
17549 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17550 "dynamic property");
17554 case DW_AT_data_member_location
:
17558 if (!handle_data_member_location (target_die
, target_cu
,
17562 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17563 baton
->property_type
= read_type_die (target_die
->parent
,
17565 baton
->offset_info
.offset
= offset
;
17566 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17567 prop
->data
.baton
= baton
;
17568 prop
->kind
= PROP_ADDR_OFFSET
;
17573 else if (attr
->form_is_constant ())
17575 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17576 prop
->kind
= PROP_CONST
;
17580 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17581 dwarf2_name (die
, cu
));
17588 /* Find an integer type SIZE_IN_BYTES bytes in size and return it.
17589 UNSIGNED_P controls if the integer is unsigned or not. */
17591 static struct type
*
17592 dwarf2_per_cu_int_type (struct dwarf2_per_cu_data
*per_cu
,
17593 int size_in_bytes
, bool unsigned_p
)
17595 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
17596 struct type
*int_type
;
17598 /* Helper macro to examine the various builtin types. */
17599 #define TRY_TYPE(F) \
17600 int_type = (unsigned_p \
17601 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17602 : objfile_type (objfile)->builtin_ ## F); \
17603 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17610 TRY_TYPE (long_long
);
17614 gdb_assert_not_reached ("unable to find suitable integer type");
17617 /* Find an integer type the same size as the address size given in the
17618 compilation unit header for PER_CU. UNSIGNED_P controls if the integer
17619 is unsigned or not. */
17621 static struct type
*
17622 dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data
*per_cu
,
17625 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
17626 return dwarf2_per_cu_int_type (per_cu
, addr_size
, unsigned_p
);
17629 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17630 present (which is valid) then compute the default type based on the
17631 compilation units address size. */
17633 static struct type
*
17634 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17636 struct type
*index_type
= die_type (die
, cu
);
17638 /* Dwarf-2 specifications explicitly allows to create subrange types
17639 without specifying a base type.
17640 In that case, the base type must be set to the type of
17641 the lower bound, upper bound or count, in that order, if any of these
17642 three attributes references an object that has a type.
17643 If no base type is found, the Dwarf-2 specifications say that
17644 a signed integer type of size equal to the size of an address should
17646 For the following C code: `extern char gdb_int [];'
17647 GCC produces an empty range DIE.
17648 FIXME: muller/2010-05-28: Possible references to object for low bound,
17649 high bound or count are not yet handled by this code. */
17650 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17651 index_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17656 /* Read the given DW_AT_subrange DIE. */
17658 static struct type
*
17659 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17661 struct type
*base_type
, *orig_base_type
;
17662 struct type
*range_type
;
17663 struct attribute
*attr
;
17664 struct dynamic_prop low
, high
;
17665 int low_default_is_valid
;
17666 int high_bound_is_count
= 0;
17668 ULONGEST negative_mask
;
17670 orig_base_type
= read_subrange_index_type (die
, cu
);
17672 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17673 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17674 creating the range type, but we use the result of check_typedef
17675 when examining properties of the type. */
17676 base_type
= check_typedef (orig_base_type
);
17678 /* The die_type call above may have already set the type for this DIE. */
17679 range_type
= get_die_type (die
, cu
);
17683 low
.kind
= PROP_CONST
;
17684 high
.kind
= PROP_CONST
;
17685 high
.data
.const_val
= 0;
17687 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17688 omitting DW_AT_lower_bound. */
17689 switch (cu
->language
)
17692 case language_cplus
:
17693 low
.data
.const_val
= 0;
17694 low_default_is_valid
= 1;
17696 case language_fortran
:
17697 low
.data
.const_val
= 1;
17698 low_default_is_valid
= 1;
17701 case language_objc
:
17702 case language_rust
:
17703 low
.data
.const_val
= 0;
17704 low_default_is_valid
= (cu
->header
.version
>= 4);
17708 case language_pascal
:
17709 low
.data
.const_val
= 1;
17710 low_default_is_valid
= (cu
->header
.version
>= 4);
17713 low
.data
.const_val
= 0;
17714 low_default_is_valid
= 0;
17718 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17719 if (attr
!= nullptr)
17720 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17721 else if (!low_default_is_valid
)
17722 complaint (_("Missing DW_AT_lower_bound "
17723 "- DIE at %s [in module %s]"),
17724 sect_offset_str (die
->sect_off
),
17725 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17727 struct attribute
*attr_ub
, *attr_count
;
17728 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17729 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17731 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17732 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17734 /* If bounds are constant do the final calculation here. */
17735 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17736 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17738 high_bound_is_count
= 1;
17742 if (attr_ub
!= NULL
)
17743 complaint (_("Unresolved DW_AT_upper_bound "
17744 "- DIE at %s [in module %s]"),
17745 sect_offset_str (die
->sect_off
),
17746 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17747 if (attr_count
!= NULL
)
17748 complaint (_("Unresolved DW_AT_count "
17749 "- DIE at %s [in module %s]"),
17750 sect_offset_str (die
->sect_off
),
17751 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17756 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17757 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17758 bias
= dwarf2_get_attr_constant_value (bias_attr
, 0);
17760 /* Normally, the DWARF producers are expected to use a signed
17761 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17762 But this is unfortunately not always the case, as witnessed
17763 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17764 is used instead. To work around that ambiguity, we treat
17765 the bounds as signed, and thus sign-extend their values, when
17766 the base type is signed. */
17768 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17769 if (low
.kind
== PROP_CONST
17770 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17771 low
.data
.const_val
|= negative_mask
;
17772 if (high
.kind
== PROP_CONST
17773 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17774 high
.data
.const_val
|= negative_mask
;
17776 /* Check for bit and byte strides. */
17777 struct dynamic_prop byte_stride_prop
;
17778 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17779 if (attr_byte_stride
!= nullptr)
17781 struct type
*prop_type
17782 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17783 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17787 struct dynamic_prop bit_stride_prop
;
17788 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17789 if (attr_bit_stride
!= nullptr)
17791 /* It only makes sense to have either a bit or byte stride. */
17792 if (attr_byte_stride
!= nullptr)
17794 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17795 "- DIE at %s [in module %s]"),
17796 sect_offset_str (die
->sect_off
),
17797 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17798 attr_bit_stride
= nullptr;
17802 struct type
*prop_type
17803 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17804 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17809 if (attr_byte_stride
!= nullptr
17810 || attr_bit_stride
!= nullptr)
17812 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17813 struct dynamic_prop
*stride
17814 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17817 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17818 &high
, bias
, stride
, byte_stride_p
);
17821 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17823 if (high_bound_is_count
)
17824 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17826 /* Ada expects an empty array on no boundary attributes. */
17827 if (attr
== NULL
&& cu
->language
!= language_ada
)
17828 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17830 name
= dwarf2_name (die
, cu
);
17832 TYPE_NAME (range_type
) = name
;
17834 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17835 if (attr
!= nullptr)
17836 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17838 maybe_set_alignment (cu
, die
, range_type
);
17840 set_die_type (die
, range_type
, cu
);
17842 /* set_die_type should be already done. */
17843 set_descriptive_type (range_type
, die
, cu
);
17848 static struct type
*
17849 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17853 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17855 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17857 /* In Ada, an unspecified type is typically used when the description
17858 of the type is deferred to a different unit. When encountering
17859 such a type, we treat it as a stub, and try to resolve it later on,
17861 if (cu
->language
== language_ada
)
17862 TYPE_STUB (type
) = 1;
17864 return set_die_type (die
, type
, cu
);
17867 /* Read a single die and all its descendents. Set the die's sibling
17868 field to NULL; set other fields in the die correctly, and set all
17869 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17870 location of the info_ptr after reading all of those dies. PARENT
17871 is the parent of the die in question. */
17873 static struct die_info
*
17874 read_die_and_children (const struct die_reader_specs
*reader
,
17875 const gdb_byte
*info_ptr
,
17876 const gdb_byte
**new_info_ptr
,
17877 struct die_info
*parent
)
17879 struct die_info
*die
;
17880 const gdb_byte
*cur_ptr
;
17882 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17885 *new_info_ptr
= cur_ptr
;
17888 store_in_ref_table (die
, reader
->cu
);
17890 if (die
->has_children
)
17891 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17895 *new_info_ptr
= cur_ptr
;
17898 die
->sibling
= NULL
;
17899 die
->parent
= parent
;
17903 /* Read a die, all of its descendents, and all of its siblings; set
17904 all of the fields of all of the dies correctly. Arguments are as
17905 in read_die_and_children. */
17907 static struct die_info
*
17908 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17909 const gdb_byte
*info_ptr
,
17910 const gdb_byte
**new_info_ptr
,
17911 struct die_info
*parent
)
17913 struct die_info
*first_die
, *last_sibling
;
17914 const gdb_byte
*cur_ptr
;
17916 cur_ptr
= info_ptr
;
17917 first_die
= last_sibling
= NULL
;
17921 struct die_info
*die
17922 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17926 *new_info_ptr
= cur_ptr
;
17933 last_sibling
->sibling
= die
;
17935 last_sibling
= die
;
17939 /* Read a die, all of its descendents, and all of its siblings; set
17940 all of the fields of all of the dies correctly. Arguments are as
17941 in read_die_and_children.
17942 This the main entry point for reading a DIE and all its children. */
17944 static struct die_info
*
17945 read_die_and_siblings (const struct die_reader_specs
*reader
,
17946 const gdb_byte
*info_ptr
,
17947 const gdb_byte
**new_info_ptr
,
17948 struct die_info
*parent
)
17950 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17951 new_info_ptr
, parent
);
17953 if (dwarf_die_debug
)
17955 fprintf_unfiltered (gdb_stdlog
,
17956 "Read die from %s@0x%x of %s:\n",
17957 reader
->die_section
->get_name (),
17958 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17959 bfd_get_filename (reader
->abfd
));
17960 dump_die (die
, dwarf_die_debug
);
17966 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17968 The caller is responsible for filling in the extra attributes
17969 and updating (*DIEP)->num_attrs.
17970 Set DIEP to point to a newly allocated die with its information,
17971 except for its child, sibling, and parent fields. */
17973 static const gdb_byte
*
17974 read_full_die_1 (const struct die_reader_specs
*reader
,
17975 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17976 int num_extra_attrs
)
17978 unsigned int abbrev_number
, bytes_read
, i
;
17979 struct abbrev_info
*abbrev
;
17980 struct die_info
*die
;
17981 struct dwarf2_cu
*cu
= reader
->cu
;
17982 bfd
*abfd
= reader
->abfd
;
17984 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17985 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17986 info_ptr
+= bytes_read
;
17987 if (!abbrev_number
)
17993 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17995 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17997 bfd_get_filename (abfd
));
17999 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18000 die
->sect_off
= sect_off
;
18001 die
->tag
= abbrev
->tag
;
18002 die
->abbrev
= abbrev_number
;
18003 die
->has_children
= abbrev
->has_children
;
18005 /* Make the result usable.
18006 The caller needs to update num_attrs after adding the extra
18008 die
->num_attrs
= abbrev
->num_attrs
;
18010 std::vector
<int> indexes_that_need_reprocess
;
18011 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18013 bool need_reprocess
;
18015 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18016 info_ptr
, &need_reprocess
);
18017 if (need_reprocess
)
18018 indexes_that_need_reprocess
.push_back (i
);
18021 struct attribute
*attr
= dwarf2_attr_no_follow (die
, DW_AT_str_offsets_base
);
18022 if (attr
!= nullptr)
18023 cu
->str_offsets_base
= DW_UNSND (attr
);
18025 auto maybe_addr_base
= lookup_addr_base(die
);
18026 if (maybe_addr_base
.has_value ())
18027 cu
->addr_base
= *maybe_addr_base
;
18028 for (int index
: indexes_that_need_reprocess
)
18029 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
18034 /* Read a die and all its attributes.
18035 Set DIEP to point to a newly allocated die with its information,
18036 except for its child, sibling, and parent fields. */
18038 static const gdb_byte
*
18039 read_full_die (const struct die_reader_specs
*reader
,
18040 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18042 const gdb_byte
*result
;
18044 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18046 if (dwarf_die_debug
)
18048 fprintf_unfiltered (gdb_stdlog
,
18049 "Read die from %s@0x%x of %s:\n",
18050 reader
->die_section
->get_name (),
18051 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18052 bfd_get_filename (reader
->abfd
));
18053 dump_die (*diep
, dwarf_die_debug
);
18060 /* Returns nonzero if TAG represents a type that we might generate a partial
18064 is_type_tag_for_partial (int tag
)
18069 /* Some types that would be reasonable to generate partial symbols for,
18070 that we don't at present. */
18071 case DW_TAG_array_type
:
18072 case DW_TAG_file_type
:
18073 case DW_TAG_ptr_to_member_type
:
18074 case DW_TAG_set_type
:
18075 case DW_TAG_string_type
:
18076 case DW_TAG_subroutine_type
:
18078 case DW_TAG_base_type
:
18079 case DW_TAG_class_type
:
18080 case DW_TAG_interface_type
:
18081 case DW_TAG_enumeration_type
:
18082 case DW_TAG_structure_type
:
18083 case DW_TAG_subrange_type
:
18084 case DW_TAG_typedef
:
18085 case DW_TAG_union_type
:
18092 /* Load all DIEs that are interesting for partial symbols into memory. */
18094 static struct partial_die_info
*
18095 load_partial_dies (const struct die_reader_specs
*reader
,
18096 const gdb_byte
*info_ptr
, int building_psymtab
)
18098 struct dwarf2_cu
*cu
= reader
->cu
;
18099 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18100 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18101 unsigned int bytes_read
;
18102 unsigned int load_all
= 0;
18103 int nesting_level
= 1;
18108 gdb_assert (cu
->per_cu
!= NULL
);
18109 if (cu
->per_cu
->load_all_dies
)
18113 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18117 &cu
->comp_unit_obstack
,
18118 hashtab_obstack_allocate
,
18119 dummy_obstack_deallocate
);
18123 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18125 /* A NULL abbrev means the end of a series of children. */
18126 if (abbrev
== NULL
)
18128 if (--nesting_level
== 0)
18131 info_ptr
+= bytes_read
;
18132 last_die
= parent_die
;
18133 parent_die
= parent_die
->die_parent
;
18137 /* Check for template arguments. We never save these; if
18138 they're seen, we just mark the parent, and go on our way. */
18139 if (parent_die
!= NULL
18140 && cu
->language
== language_cplus
18141 && (abbrev
->tag
== DW_TAG_template_type_param
18142 || abbrev
->tag
== DW_TAG_template_value_param
))
18144 parent_die
->has_template_arguments
= 1;
18148 /* We don't need a partial DIE for the template argument. */
18149 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18154 /* We only recurse into c++ subprograms looking for template arguments.
18155 Skip their other children. */
18157 && cu
->language
== language_cplus
18158 && parent_die
!= NULL
18159 && parent_die
->tag
== DW_TAG_subprogram
)
18161 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18165 /* Check whether this DIE is interesting enough to save. Normally
18166 we would not be interested in members here, but there may be
18167 later variables referencing them via DW_AT_specification (for
18168 static members). */
18170 && !is_type_tag_for_partial (abbrev
->tag
)
18171 && abbrev
->tag
!= DW_TAG_constant
18172 && abbrev
->tag
!= DW_TAG_enumerator
18173 && abbrev
->tag
!= DW_TAG_subprogram
18174 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18175 && abbrev
->tag
!= DW_TAG_lexical_block
18176 && abbrev
->tag
!= DW_TAG_variable
18177 && abbrev
->tag
!= DW_TAG_namespace
18178 && abbrev
->tag
!= DW_TAG_module
18179 && abbrev
->tag
!= DW_TAG_member
18180 && abbrev
->tag
!= DW_TAG_imported_unit
18181 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18183 /* Otherwise we skip to the next sibling, if any. */
18184 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18188 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18191 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18193 /* This two-pass algorithm for processing partial symbols has a
18194 high cost in cache pressure. Thus, handle some simple cases
18195 here which cover the majority of C partial symbols. DIEs
18196 which neither have specification tags in them, nor could have
18197 specification tags elsewhere pointing at them, can simply be
18198 processed and discarded.
18200 This segment is also optional; scan_partial_symbols and
18201 add_partial_symbol will handle these DIEs if we chain
18202 them in normally. When compilers which do not emit large
18203 quantities of duplicate debug information are more common,
18204 this code can probably be removed. */
18206 /* Any complete simple types at the top level (pretty much all
18207 of them, for a language without namespaces), can be processed
18209 if (parent_die
== NULL
18210 && pdi
.has_specification
== 0
18211 && pdi
.is_declaration
== 0
18212 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18213 || pdi
.tag
== DW_TAG_base_type
18214 || pdi
.tag
== DW_TAG_subrange_type
))
18216 if (building_psymtab
&& pdi
.name
!= NULL
)
18217 add_psymbol_to_list (pdi
.name
, false,
18218 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18219 psymbol_placement::STATIC
,
18220 0, cu
->language
, objfile
);
18221 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18225 /* The exception for DW_TAG_typedef with has_children above is
18226 a workaround of GCC PR debug/47510. In the case of this complaint
18227 type_name_or_error will error on such types later.
18229 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18230 it could not find the child DIEs referenced later, this is checked
18231 above. In correct DWARF DW_TAG_typedef should have no children. */
18233 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18234 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18235 "- DIE at %s [in module %s]"),
18236 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18238 /* If we're at the second level, and we're an enumerator, and
18239 our parent has no specification (meaning possibly lives in a
18240 namespace elsewhere), then we can add the partial symbol now
18241 instead of queueing it. */
18242 if (pdi
.tag
== DW_TAG_enumerator
18243 && parent_die
!= NULL
18244 && parent_die
->die_parent
== NULL
18245 && parent_die
->tag
== DW_TAG_enumeration_type
18246 && parent_die
->has_specification
== 0)
18248 if (pdi
.name
== NULL
)
18249 complaint (_("malformed enumerator DIE ignored"));
18250 else if (building_psymtab
)
18251 add_psymbol_to_list (pdi
.name
, false,
18252 VAR_DOMAIN
, LOC_CONST
, -1,
18253 cu
->language
== language_cplus
18254 ? psymbol_placement::GLOBAL
18255 : psymbol_placement::STATIC
,
18256 0, cu
->language
, objfile
);
18258 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18262 struct partial_die_info
*part_die
18263 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18265 /* We'll save this DIE so link it in. */
18266 part_die
->die_parent
= parent_die
;
18267 part_die
->die_sibling
= NULL
;
18268 part_die
->die_child
= NULL
;
18270 if (last_die
&& last_die
== parent_die
)
18271 last_die
->die_child
= part_die
;
18273 last_die
->die_sibling
= part_die
;
18275 last_die
= part_die
;
18277 if (first_die
== NULL
)
18278 first_die
= part_die
;
18280 /* Maybe add the DIE to the hash table. Not all DIEs that we
18281 find interesting need to be in the hash table, because we
18282 also have the parent/sibling/child chains; only those that we
18283 might refer to by offset later during partial symbol reading.
18285 For now this means things that might have be the target of a
18286 DW_AT_specification, DW_AT_abstract_origin, or
18287 DW_AT_extension. DW_AT_extension will refer only to
18288 namespaces; DW_AT_abstract_origin refers to functions (and
18289 many things under the function DIE, but we do not recurse
18290 into function DIEs during partial symbol reading) and
18291 possibly variables as well; DW_AT_specification refers to
18292 declarations. Declarations ought to have the DW_AT_declaration
18293 flag. It happens that GCC forgets to put it in sometimes, but
18294 only for functions, not for types.
18296 Adding more things than necessary to the hash table is harmless
18297 except for the performance cost. Adding too few will result in
18298 wasted time in find_partial_die, when we reread the compilation
18299 unit with load_all_dies set. */
18302 || abbrev
->tag
== DW_TAG_constant
18303 || abbrev
->tag
== DW_TAG_subprogram
18304 || abbrev
->tag
== DW_TAG_variable
18305 || abbrev
->tag
== DW_TAG_namespace
18306 || part_die
->is_declaration
)
18310 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18311 to_underlying (part_die
->sect_off
),
18316 /* For some DIEs we want to follow their children (if any). For C
18317 we have no reason to follow the children of structures; for other
18318 languages we have to, so that we can get at method physnames
18319 to infer fully qualified class names, for DW_AT_specification,
18320 and for C++ template arguments. For C++, we also look one level
18321 inside functions to find template arguments (if the name of the
18322 function does not already contain the template arguments).
18324 For Ada and Fortran, we need to scan the children of subprograms
18325 and lexical blocks as well because these languages allow the
18326 definition of nested entities that could be interesting for the
18327 debugger, such as nested subprograms for instance. */
18328 if (last_die
->has_children
18330 || last_die
->tag
== DW_TAG_namespace
18331 || last_die
->tag
== DW_TAG_module
18332 || last_die
->tag
== DW_TAG_enumeration_type
18333 || (cu
->language
== language_cplus
18334 && last_die
->tag
== DW_TAG_subprogram
18335 && (last_die
->name
== NULL
18336 || strchr (last_die
->name
, '<') == NULL
))
18337 || (cu
->language
!= language_c
18338 && (last_die
->tag
== DW_TAG_class_type
18339 || last_die
->tag
== DW_TAG_interface_type
18340 || last_die
->tag
== DW_TAG_structure_type
18341 || last_die
->tag
== DW_TAG_union_type
))
18342 || ((cu
->language
== language_ada
18343 || cu
->language
== language_fortran
)
18344 && (last_die
->tag
== DW_TAG_subprogram
18345 || last_die
->tag
== DW_TAG_lexical_block
))))
18348 parent_die
= last_die
;
18352 /* Otherwise we skip to the next sibling, if any. */
18353 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18355 /* Back to the top, do it again. */
18359 partial_die_info::partial_die_info (sect_offset sect_off_
,
18360 struct abbrev_info
*abbrev
)
18361 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18365 /* Read a minimal amount of information into the minimal die structure.
18366 INFO_PTR should point just after the initial uleb128 of a DIE. */
18369 partial_die_info::read (const struct die_reader_specs
*reader
,
18370 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18372 struct dwarf2_cu
*cu
= reader
->cu
;
18373 struct dwarf2_per_objfile
*dwarf2_per_objfile
18374 = cu
->per_cu
->dwarf2_per_objfile
;
18376 int has_low_pc_attr
= 0;
18377 int has_high_pc_attr
= 0;
18378 int high_pc_relative
= 0;
18380 std::vector
<struct attribute
> attr_vec (abbrev
.num_attrs
);
18381 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18383 bool need_reprocess
;
18384 info_ptr
= read_attribute (reader
, &attr_vec
[i
], &abbrev
.attrs
[i
],
18385 info_ptr
, &need_reprocess
);
18386 /* String and address offsets that need to do the reprocessing have
18387 already been read at this point, so there is no need to wait until
18388 the loop terminates to do the reprocessing. */
18389 if (need_reprocess
)
18390 read_attribute_reprocess (reader
, &attr_vec
[i
]);
18391 attribute
&attr
= attr_vec
[i
];
18392 /* Store the data if it is of an attribute we want to keep in a
18393 partial symbol table. */
18399 case DW_TAG_compile_unit
:
18400 case DW_TAG_partial_unit
:
18401 case DW_TAG_type_unit
:
18402 /* Compilation units have a DW_AT_name that is a filename, not
18403 a source language identifier. */
18404 case DW_TAG_enumeration_type
:
18405 case DW_TAG_enumerator
:
18406 /* These tags always have simple identifiers already; no need
18407 to canonicalize them. */
18408 name
= DW_STRING (&attr
);
18412 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18415 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18416 &objfile
->per_bfd
->storage_obstack
);
18421 case DW_AT_linkage_name
:
18422 case DW_AT_MIPS_linkage_name
:
18423 /* Note that both forms of linkage name might appear. We
18424 assume they will be the same, and we only store the last
18426 linkage_name
= DW_STRING (&attr
);
18429 has_low_pc_attr
= 1;
18430 lowpc
= attr
.value_as_address ();
18432 case DW_AT_high_pc
:
18433 has_high_pc_attr
= 1;
18434 highpc
= attr
.value_as_address ();
18435 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18436 high_pc_relative
= 1;
18438 case DW_AT_location
:
18439 /* Support the .debug_loc offsets. */
18440 if (attr
.form_is_block ())
18442 d
.locdesc
= DW_BLOCK (&attr
);
18444 else if (attr
.form_is_section_offset ())
18446 dwarf2_complex_location_expr_complaint ();
18450 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18451 "partial symbol information");
18454 case DW_AT_external
:
18455 is_external
= DW_UNSND (&attr
);
18457 case DW_AT_declaration
:
18458 is_declaration
= DW_UNSND (&attr
);
18463 case DW_AT_abstract_origin
:
18464 case DW_AT_specification
:
18465 case DW_AT_extension
:
18466 has_specification
= 1;
18467 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18468 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18469 || cu
->per_cu
->is_dwz
);
18471 case DW_AT_sibling
:
18472 /* Ignore absolute siblings, they might point outside of
18473 the current compile unit. */
18474 if (attr
.form
== DW_FORM_ref_addr
)
18475 complaint (_("ignoring absolute DW_AT_sibling"));
18478 const gdb_byte
*buffer
= reader
->buffer
;
18479 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18480 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18482 if (sibling_ptr
< info_ptr
)
18483 complaint (_("DW_AT_sibling points backwards"));
18484 else if (sibling_ptr
> reader
->buffer_end
)
18485 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18487 sibling
= sibling_ptr
;
18490 case DW_AT_byte_size
:
18493 case DW_AT_const_value
:
18494 has_const_value
= 1;
18496 case DW_AT_calling_convention
:
18497 /* DWARF doesn't provide a way to identify a program's source-level
18498 entry point. DW_AT_calling_convention attributes are only meant
18499 to describe functions' calling conventions.
18501 However, because it's a necessary piece of information in
18502 Fortran, and before DWARF 4 DW_CC_program was the only
18503 piece of debugging information whose definition refers to
18504 a 'main program' at all, several compilers marked Fortran
18505 main programs with DW_CC_program --- even when those
18506 functions use the standard calling conventions.
18508 Although DWARF now specifies a way to provide this
18509 information, we support this practice for backward
18511 if (DW_UNSND (&attr
) == DW_CC_program
18512 && cu
->language
== language_fortran
)
18513 main_subprogram
= 1;
18516 if (DW_UNSND (&attr
) == DW_INL_inlined
18517 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18518 may_be_inlined
= 1;
18522 if (tag
== DW_TAG_imported_unit
)
18524 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18525 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18526 || cu
->per_cu
->is_dwz
);
18530 case DW_AT_main_subprogram
:
18531 main_subprogram
= DW_UNSND (&attr
);
18536 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18537 but that requires a full DIE, so instead we just
18539 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18540 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18541 + (need_ranges_base
18545 /* Value of the DW_AT_ranges attribute is the offset in the
18546 .debug_ranges section. */
18547 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18558 /* For Ada, if both the name and the linkage name appear, we prefer
18559 the latter. This lets "catch exception" work better, regardless
18560 of the order in which the name and linkage name were emitted.
18561 Really, though, this is just a workaround for the fact that gdb
18562 doesn't store both the name and the linkage name. */
18563 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18564 name
= linkage_name
;
18566 if (high_pc_relative
)
18569 if (has_low_pc_attr
&& has_high_pc_attr
)
18571 /* When using the GNU linker, .gnu.linkonce. sections are used to
18572 eliminate duplicate copies of functions and vtables and such.
18573 The linker will arbitrarily choose one and discard the others.
18574 The AT_*_pc values for such functions refer to local labels in
18575 these sections. If the section from that file was discarded, the
18576 labels are not in the output, so the relocs get a value of 0.
18577 If this is a discarded function, mark the pc bounds as invalid,
18578 so that GDB will ignore it. */
18579 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18581 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18582 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18584 complaint (_("DW_AT_low_pc %s is zero "
18585 "for DIE at %s [in module %s]"),
18586 paddress (gdbarch
, lowpc
),
18587 sect_offset_str (sect_off
),
18588 objfile_name (objfile
));
18590 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18591 else if (lowpc
>= highpc
)
18593 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18594 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18596 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18597 "for DIE at %s [in module %s]"),
18598 paddress (gdbarch
, lowpc
),
18599 paddress (gdbarch
, highpc
),
18600 sect_offset_str (sect_off
),
18601 objfile_name (objfile
));
18610 /* Find a cached partial DIE at OFFSET in CU. */
18612 struct partial_die_info
*
18613 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18615 struct partial_die_info
*lookup_die
= NULL
;
18616 struct partial_die_info
part_die (sect_off
);
18618 lookup_die
= ((struct partial_die_info
*)
18619 htab_find_with_hash (partial_dies
, &part_die
,
18620 to_underlying (sect_off
)));
18625 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18626 except in the case of .debug_types DIEs which do not reference
18627 outside their CU (they do however referencing other types via
18628 DW_FORM_ref_sig8). */
18630 static const struct cu_partial_die_info
18631 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18633 struct dwarf2_per_objfile
*dwarf2_per_objfile
18634 = cu
->per_cu
->dwarf2_per_objfile
;
18635 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18636 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18637 struct partial_die_info
*pd
= NULL
;
18639 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18640 && offset_in_cu_p (&cu
->header
, sect_off
))
18642 pd
= cu
->find_partial_die (sect_off
);
18645 /* We missed recording what we needed.
18646 Load all dies and try again. */
18647 per_cu
= cu
->per_cu
;
18651 /* TUs don't reference other CUs/TUs (except via type signatures). */
18652 if (cu
->per_cu
->is_debug_types
)
18654 error (_("Dwarf Error: Type Unit at offset %s contains"
18655 " external reference to offset %s [in module %s].\n"),
18656 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18657 bfd_get_filename (objfile
->obfd
));
18659 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18660 dwarf2_per_objfile
);
18662 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18663 load_partial_comp_unit (per_cu
);
18665 per_cu
->cu
->last_used
= 0;
18666 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18669 /* If we didn't find it, and not all dies have been loaded,
18670 load them all and try again. */
18672 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18674 per_cu
->load_all_dies
= 1;
18676 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18677 THIS_CU->cu may already be in use. So we can't just free it and
18678 replace its DIEs with the ones we read in. Instead, we leave those
18679 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18680 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18682 load_partial_comp_unit (per_cu
);
18684 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18688 internal_error (__FILE__
, __LINE__
,
18689 _("could not find partial DIE %s "
18690 "in cache [from module %s]\n"),
18691 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18692 return { per_cu
->cu
, pd
};
18695 /* See if we can figure out if the class lives in a namespace. We do
18696 this by looking for a member function; its demangled name will
18697 contain namespace info, if there is any. */
18700 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18701 struct dwarf2_cu
*cu
)
18703 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18704 what template types look like, because the demangler
18705 frequently doesn't give the same name as the debug info. We
18706 could fix this by only using the demangled name to get the
18707 prefix (but see comment in read_structure_type). */
18709 struct partial_die_info
*real_pdi
;
18710 struct partial_die_info
*child_pdi
;
18712 /* If this DIE (this DIE's specification, if any) has a parent, then
18713 we should not do this. We'll prepend the parent's fully qualified
18714 name when we create the partial symbol. */
18716 real_pdi
= struct_pdi
;
18717 while (real_pdi
->has_specification
)
18719 auto res
= find_partial_die (real_pdi
->spec_offset
,
18720 real_pdi
->spec_is_dwz
, cu
);
18721 real_pdi
= res
.pdi
;
18725 if (real_pdi
->die_parent
!= NULL
)
18728 for (child_pdi
= struct_pdi
->die_child
;
18730 child_pdi
= child_pdi
->die_sibling
)
18732 if (child_pdi
->tag
== DW_TAG_subprogram
18733 && child_pdi
->linkage_name
!= NULL
)
18735 gdb::unique_xmalloc_ptr
<char> actual_class_name
18736 (language_class_name_from_physname (cu
->language_defn
,
18737 child_pdi
->linkage_name
));
18738 if (actual_class_name
!= NULL
)
18740 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18742 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
18743 actual_class_name
.get ());
18751 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18753 /* Once we've fixed up a die, there's no point in doing so again.
18754 This also avoids a memory leak if we were to call
18755 guess_partial_die_structure_name multiple times. */
18759 /* If we found a reference attribute and the DIE has no name, try
18760 to find a name in the referred to DIE. */
18762 if (name
== NULL
&& has_specification
)
18764 struct partial_die_info
*spec_die
;
18766 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18767 spec_die
= res
.pdi
;
18770 spec_die
->fixup (cu
);
18772 if (spec_die
->name
)
18774 name
= spec_die
->name
;
18776 /* Copy DW_AT_external attribute if it is set. */
18777 if (spec_die
->is_external
)
18778 is_external
= spec_die
->is_external
;
18782 /* Set default names for some unnamed DIEs. */
18784 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18785 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18787 /* If there is no parent die to provide a namespace, and there are
18788 children, see if we can determine the namespace from their linkage
18790 if (cu
->language
== language_cplus
18791 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18792 && die_parent
== NULL
18794 && (tag
== DW_TAG_class_type
18795 || tag
== DW_TAG_structure_type
18796 || tag
== DW_TAG_union_type
))
18797 guess_partial_die_structure_name (this, cu
);
18799 /* GCC might emit a nameless struct or union that has a linkage
18800 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18802 && (tag
== DW_TAG_class_type
18803 || tag
== DW_TAG_interface_type
18804 || tag
== DW_TAG_structure_type
18805 || tag
== DW_TAG_union_type
)
18806 && linkage_name
!= NULL
)
18808 gdb::unique_xmalloc_ptr
<char> demangled
18809 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18810 if (demangled
!= nullptr)
18814 /* Strip any leading namespaces/classes, keep only the base name.
18815 DW_AT_name for named DIEs does not contain the prefixes. */
18816 base
= strrchr (demangled
.get (), ':');
18817 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18820 base
= demangled
.get ();
18822 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18823 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, base
);
18830 /* Process the attributes that had to be skipped in the first round. These
18831 attributes are the ones that need str_offsets_base or addr_base attributes.
18832 They could not have been processed in the first round, because at the time
18833 the values of str_offsets_base or addr_base may not have been known. */
18834 void read_attribute_reprocess (const struct die_reader_specs
*reader
,
18835 struct attribute
*attr
)
18837 struct dwarf2_cu
*cu
= reader
->cu
;
18838 switch (attr
->form
)
18840 case DW_FORM_addrx
:
18841 case DW_FORM_GNU_addr_index
:
18842 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18845 case DW_FORM_strx1
:
18846 case DW_FORM_strx2
:
18847 case DW_FORM_strx3
:
18848 case DW_FORM_strx4
:
18849 case DW_FORM_GNU_str_index
:
18851 unsigned int str_index
= DW_UNSND (attr
);
18852 if (reader
->dwo_file
!= NULL
)
18854 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18855 DW_STRING_IS_CANONICAL (attr
) = 0;
18859 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18860 DW_STRING_IS_CANONICAL (attr
) = 0;
18865 gdb_assert_not_reached (_("Unexpected DWARF form."));
18869 /* Read an attribute value described by an attribute form. */
18871 static const gdb_byte
*
18872 read_attribute_value (const struct die_reader_specs
*reader
,
18873 struct attribute
*attr
, unsigned form
,
18874 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18875 bool *need_reprocess
)
18877 struct dwarf2_cu
*cu
= reader
->cu
;
18878 struct dwarf2_per_objfile
*dwarf2_per_objfile
18879 = cu
->per_cu
->dwarf2_per_objfile
;
18880 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18881 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18882 bfd
*abfd
= reader
->abfd
;
18883 struct comp_unit_head
*cu_header
= &cu
->header
;
18884 unsigned int bytes_read
;
18885 struct dwarf_block
*blk
;
18886 *need_reprocess
= false;
18888 attr
->form
= (enum dwarf_form
) form
;
18891 case DW_FORM_ref_addr
:
18892 if (cu
->header
.version
== 2)
18893 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18895 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18896 &cu
->header
, &bytes_read
);
18897 info_ptr
+= bytes_read
;
18899 case DW_FORM_GNU_ref_alt
:
18900 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18901 info_ptr
+= bytes_read
;
18904 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18905 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18906 info_ptr
+= bytes_read
;
18908 case DW_FORM_block2
:
18909 blk
= dwarf_alloc_block (cu
);
18910 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18912 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18913 info_ptr
+= blk
->size
;
18914 DW_BLOCK (attr
) = blk
;
18916 case DW_FORM_block4
:
18917 blk
= dwarf_alloc_block (cu
);
18918 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18920 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18921 info_ptr
+= blk
->size
;
18922 DW_BLOCK (attr
) = blk
;
18924 case DW_FORM_data2
:
18925 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18928 case DW_FORM_data4
:
18929 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18932 case DW_FORM_data8
:
18933 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18936 case DW_FORM_data16
:
18937 blk
= dwarf_alloc_block (cu
);
18939 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18941 DW_BLOCK (attr
) = blk
;
18943 case DW_FORM_sec_offset
:
18944 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18945 info_ptr
+= bytes_read
;
18947 case DW_FORM_string
:
18948 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18949 DW_STRING_IS_CANONICAL (attr
) = 0;
18950 info_ptr
+= bytes_read
;
18953 if (!cu
->per_cu
->is_dwz
)
18955 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18956 abfd
, info_ptr
, cu_header
,
18958 DW_STRING_IS_CANONICAL (attr
) = 0;
18959 info_ptr
+= bytes_read
;
18963 case DW_FORM_line_strp
:
18964 if (!cu
->per_cu
->is_dwz
)
18966 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18968 cu_header
, &bytes_read
);
18969 DW_STRING_IS_CANONICAL (attr
) = 0;
18970 info_ptr
+= bytes_read
;
18974 case DW_FORM_GNU_strp_alt
:
18976 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18977 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18980 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18982 DW_STRING_IS_CANONICAL (attr
) = 0;
18983 info_ptr
+= bytes_read
;
18986 case DW_FORM_exprloc
:
18987 case DW_FORM_block
:
18988 blk
= dwarf_alloc_block (cu
);
18989 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18990 info_ptr
+= bytes_read
;
18991 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18992 info_ptr
+= blk
->size
;
18993 DW_BLOCK (attr
) = blk
;
18995 case DW_FORM_block1
:
18996 blk
= dwarf_alloc_block (cu
);
18997 blk
->size
= read_1_byte (abfd
, info_ptr
);
18999 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19000 info_ptr
+= blk
->size
;
19001 DW_BLOCK (attr
) = blk
;
19003 case DW_FORM_data1
:
19004 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19008 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19011 case DW_FORM_flag_present
:
19012 DW_UNSND (attr
) = 1;
19014 case DW_FORM_sdata
:
19015 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19016 info_ptr
+= bytes_read
;
19018 case DW_FORM_udata
:
19019 case DW_FORM_rnglistx
:
19020 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19021 info_ptr
+= bytes_read
;
19024 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19025 + read_1_byte (abfd
, info_ptr
));
19029 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19030 + read_2_bytes (abfd
, info_ptr
));
19034 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19035 + read_4_bytes (abfd
, info_ptr
));
19039 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19040 + read_8_bytes (abfd
, info_ptr
));
19043 case DW_FORM_ref_sig8
:
19044 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19047 case DW_FORM_ref_udata
:
19048 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19049 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19050 info_ptr
+= bytes_read
;
19052 case DW_FORM_indirect
:
19053 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19054 info_ptr
+= bytes_read
;
19055 if (form
== DW_FORM_implicit_const
)
19057 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19058 info_ptr
+= bytes_read
;
19060 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19061 info_ptr
, need_reprocess
);
19063 case DW_FORM_implicit_const
:
19064 DW_SND (attr
) = implicit_const
;
19066 case DW_FORM_addrx
:
19067 case DW_FORM_GNU_addr_index
:
19068 *need_reprocess
= true;
19069 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19070 info_ptr
+= bytes_read
;
19073 case DW_FORM_strx1
:
19074 case DW_FORM_strx2
:
19075 case DW_FORM_strx3
:
19076 case DW_FORM_strx4
:
19077 case DW_FORM_GNU_str_index
:
19079 ULONGEST str_index
;
19080 if (form
== DW_FORM_strx1
)
19082 str_index
= read_1_byte (abfd
, info_ptr
);
19085 else if (form
== DW_FORM_strx2
)
19087 str_index
= read_2_bytes (abfd
, info_ptr
);
19090 else if (form
== DW_FORM_strx3
)
19092 str_index
= read_3_bytes (abfd
, info_ptr
);
19095 else if (form
== DW_FORM_strx4
)
19097 str_index
= read_4_bytes (abfd
, info_ptr
);
19102 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19103 info_ptr
+= bytes_read
;
19105 *need_reprocess
= true;
19106 DW_UNSND (attr
) = str_index
;
19110 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19111 dwarf_form_name (form
),
19112 bfd_get_filename (abfd
));
19116 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19117 attr
->form
= DW_FORM_GNU_ref_alt
;
19119 /* We have seen instances where the compiler tried to emit a byte
19120 size attribute of -1 which ended up being encoded as an unsigned
19121 0xffffffff. Although 0xffffffff is technically a valid size value,
19122 an object of this size seems pretty unlikely so we can relatively
19123 safely treat these cases as if the size attribute was invalid and
19124 treat them as zero by default. */
19125 if (attr
->name
== DW_AT_byte_size
19126 && form
== DW_FORM_data4
19127 && DW_UNSND (attr
) >= 0xffffffff)
19130 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19131 hex_string (DW_UNSND (attr
)));
19132 DW_UNSND (attr
) = 0;
19138 /* Read an attribute described by an abbreviated attribute. */
19140 static const gdb_byte
*
19141 read_attribute (const struct die_reader_specs
*reader
,
19142 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19143 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19145 attr
->name
= abbrev
->name
;
19146 return read_attribute_value (reader
, attr
, abbrev
->form
,
19147 abbrev
->implicit_const
, info_ptr
,
19152 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19153 unsigned int *bytes_read
)
19155 struct comp_unit_head
*cu_header
= &cu
->header
;
19156 CORE_ADDR retval
= 0;
19158 if (cu_header
->signed_addr_p
)
19160 switch (cu_header
->addr_size
)
19163 retval
= bfd_get_signed_16 (abfd
, buf
);
19166 retval
= bfd_get_signed_32 (abfd
, buf
);
19169 retval
= bfd_get_signed_64 (abfd
, buf
);
19172 internal_error (__FILE__
, __LINE__
,
19173 _("read_address: bad switch, signed [in module %s]"),
19174 bfd_get_filename (abfd
));
19179 switch (cu_header
->addr_size
)
19182 retval
= bfd_get_16 (abfd
, buf
);
19185 retval
= bfd_get_32 (abfd
, buf
);
19188 retval
= bfd_get_64 (abfd
, buf
);
19191 internal_error (__FILE__
, __LINE__
,
19192 _("read_address: bad switch, "
19193 "unsigned [in module %s]"),
19194 bfd_get_filename (abfd
));
19198 *bytes_read
= cu_header
->addr_size
;
19202 /* Read the initial length from a section. The (draft) DWARF 3
19203 specification allows the initial length to take up either 4 bytes
19204 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19205 bytes describe the length and all offsets will be 8 bytes in length
19208 An older, non-standard 64-bit format is also handled by this
19209 function. The older format in question stores the initial length
19210 as an 8-byte quantity without an escape value. Lengths greater
19211 than 2^32 aren't very common which means that the initial 4 bytes
19212 is almost always zero. Since a length value of zero doesn't make
19213 sense for the 32-bit format, this initial zero can be considered to
19214 be an escape value which indicates the presence of the older 64-bit
19215 format. As written, the code can't detect (old format) lengths
19216 greater than 4GB. If it becomes necessary to handle lengths
19217 somewhat larger than 4GB, we could allow other small values (such
19218 as the non-sensical values of 1, 2, and 3) to also be used as
19219 escape values indicating the presence of the old format.
19221 The value returned via bytes_read should be used to increment the
19222 relevant pointer after calling read_initial_length().
19224 [ Note: read_initial_length() and read_offset() are based on the
19225 document entitled "DWARF Debugging Information Format", revision
19226 3, draft 8, dated November 19, 2001. This document was obtained
19229 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19231 This document is only a draft and is subject to change. (So beware.)
19233 Details regarding the older, non-standard 64-bit format were
19234 determined empirically by examining 64-bit ELF files produced by
19235 the SGI toolchain on an IRIX 6.5 machine.
19237 - Kevin, July 16, 2002
19241 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19243 LONGEST length
= bfd_get_32 (abfd
, buf
);
19245 if (length
== 0xffffffff)
19247 length
= bfd_get_64 (abfd
, buf
+ 4);
19250 else if (length
== 0)
19252 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19253 length
= bfd_get_64 (abfd
, buf
);
19264 /* Cover function for read_initial_length.
19265 Returns the length of the object at BUF, and stores the size of the
19266 initial length in *BYTES_READ and stores the size that offsets will be in
19268 If the initial length size is not equivalent to that specified in
19269 CU_HEADER then issue a complaint.
19270 This is useful when reading non-comp-unit headers. */
19273 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19274 const struct comp_unit_head
*cu_header
,
19275 unsigned int *bytes_read
,
19276 unsigned int *offset_size
)
19278 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19280 gdb_assert (cu_header
->initial_length_size
== 4
19281 || cu_header
->initial_length_size
== 8
19282 || cu_header
->initial_length_size
== 12);
19284 if (cu_header
->initial_length_size
!= *bytes_read
)
19285 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19287 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19291 /* Read an offset from the data stream. The size of the offset is
19292 given by cu_header->offset_size. */
19295 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19296 const struct comp_unit_head
*cu_header
,
19297 unsigned int *bytes_read
)
19299 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19301 *bytes_read
= cu_header
->offset_size
;
19305 /* Read an offset from the data stream. */
19308 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19310 LONGEST retval
= 0;
19312 switch (offset_size
)
19315 retval
= bfd_get_32 (abfd
, buf
);
19318 retval
= bfd_get_64 (abfd
, buf
);
19321 internal_error (__FILE__
, __LINE__
,
19322 _("read_offset_1: bad switch [in module %s]"),
19323 bfd_get_filename (abfd
));
19329 static const gdb_byte
*
19330 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19332 /* If the size of a host char is 8 bits, we can return a pointer
19333 to the buffer, otherwise we have to copy the data to a buffer
19334 allocated on the temporary obstack. */
19335 gdb_assert (HOST_CHAR_BIT
== 8);
19339 static const char *
19340 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19341 unsigned int *bytes_read_ptr
)
19343 /* If the size of a host char is 8 bits, we can return a pointer
19344 to the string, otherwise we have to copy the string to a buffer
19345 allocated on the temporary obstack. */
19346 gdb_assert (HOST_CHAR_BIT
== 8);
19349 *bytes_read_ptr
= 1;
19352 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19353 return (const char *) buf
;
19356 /* Return pointer to string at section SECT offset STR_OFFSET with error
19357 reporting strings FORM_NAME and SECT_NAME. */
19359 static const char *
19360 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19361 bfd
*abfd
, LONGEST str_offset
,
19362 struct dwarf2_section_info
*sect
,
19363 const char *form_name
,
19364 const char *sect_name
)
19366 sect
->read (objfile
);
19367 if (sect
->buffer
== NULL
)
19368 error (_("%s used without %s section [in module %s]"),
19369 form_name
, sect_name
, bfd_get_filename (abfd
));
19370 if (str_offset
>= sect
->size
)
19371 error (_("%s pointing outside of %s section [in module %s]"),
19372 form_name
, sect_name
, bfd_get_filename (abfd
));
19373 gdb_assert (HOST_CHAR_BIT
== 8);
19374 if (sect
->buffer
[str_offset
] == '\0')
19376 return (const char *) (sect
->buffer
+ str_offset
);
19379 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19381 static const char *
19382 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19383 bfd
*abfd
, LONGEST str_offset
)
19385 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19387 &dwarf2_per_objfile
->str
,
19388 "DW_FORM_strp", ".debug_str");
19391 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19393 static const char *
19394 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19395 bfd
*abfd
, LONGEST str_offset
)
19397 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19399 &dwarf2_per_objfile
->line_str
,
19400 "DW_FORM_line_strp",
19401 ".debug_line_str");
19404 /* Read a string at offset STR_OFFSET in the .debug_str section from
19405 the .dwz file DWZ. Throw an error if the offset is too large. If
19406 the string consists of a single NUL byte, return NULL; otherwise
19407 return a pointer to the string. */
19409 static const char *
19410 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19411 LONGEST str_offset
)
19413 dwz
->str
.read (objfile
);
19415 if (dwz
->str
.buffer
== NULL
)
19416 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19417 "section [in module %s]"),
19418 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19419 if (str_offset
>= dwz
->str
.size
)
19420 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19421 ".debug_str section [in module %s]"),
19422 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19423 gdb_assert (HOST_CHAR_BIT
== 8);
19424 if (dwz
->str
.buffer
[str_offset
] == '\0')
19426 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19429 /* Return pointer to string at .debug_str offset as read from BUF.
19430 BUF is assumed to be in a compilation unit described by CU_HEADER.
19431 Return *BYTES_READ_PTR count of bytes read from BUF. */
19433 static const char *
19434 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19435 const gdb_byte
*buf
,
19436 const struct comp_unit_head
*cu_header
,
19437 unsigned int *bytes_read_ptr
)
19439 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19441 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19444 /* Return pointer to string at .debug_line_str offset as read from BUF.
19445 BUF is assumed to be in a compilation unit described by CU_HEADER.
19446 Return *BYTES_READ_PTR count of bytes read from BUF. */
19448 static const char *
19449 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19450 bfd
*abfd
, const gdb_byte
*buf
,
19451 const struct comp_unit_head
*cu_header
,
19452 unsigned int *bytes_read_ptr
)
19454 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19456 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19460 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19461 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19462 ADDR_SIZE is the size of addresses from the CU header. */
19465 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19466 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19469 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19470 bfd
*abfd
= objfile
->obfd
;
19471 const gdb_byte
*info_ptr
;
19472 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19474 dwarf2_per_objfile
->addr
.read (objfile
);
19475 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19476 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19477 objfile_name (objfile
));
19478 if (addr_base_or_zero
+ addr_index
* addr_size
19479 >= dwarf2_per_objfile
->addr
.size
)
19480 error (_("DW_FORM_addr_index pointing outside of "
19481 ".debug_addr section [in module %s]"),
19482 objfile_name (objfile
));
19483 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19484 + addr_base_or_zero
+ addr_index
* addr_size
);
19485 if (addr_size
== 4)
19486 return bfd_get_32 (abfd
, info_ptr
);
19488 return bfd_get_64 (abfd
, info_ptr
);
19491 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19494 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19496 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19497 cu
->addr_base
, cu
->header
.addr_size
);
19500 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19503 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19504 unsigned int *bytes_read
)
19506 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19507 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19509 return read_addr_index (cu
, addr_index
);
19512 /* Given an index in .debug_addr, fetch the value.
19513 NOTE: This can be called during dwarf expression evaluation,
19514 long after the debug information has been read, and thus per_cu->cu
19515 may no longer exist. */
19518 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19519 unsigned int addr_index
)
19521 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19522 struct dwarf2_cu
*cu
= per_cu
->cu
;
19523 gdb::optional
<ULONGEST
> addr_base
;
19526 /* We need addr_base and addr_size.
19527 If we don't have PER_CU->cu, we have to get it.
19528 Nasty, but the alternative is storing the needed info in PER_CU,
19529 which at this point doesn't seem justified: it's not clear how frequently
19530 it would get used and it would increase the size of every PER_CU.
19531 Entry points like dwarf2_per_cu_addr_size do a similar thing
19532 so we're not in uncharted territory here.
19533 Alas we need to be a bit more complicated as addr_base is contained
19536 We don't need to read the entire CU(/TU).
19537 We just need the header and top level die.
19539 IWBN to use the aging mechanism to let us lazily later discard the CU.
19540 For now we skip this optimization. */
19544 addr_base
= cu
->addr_base
;
19545 addr_size
= cu
->header
.addr_size
;
19549 cutu_reader
reader (per_cu
, NULL
, 0, 0, false);
19550 addr_base
= reader
.cu
->addr_base
;
19551 addr_size
= reader
.cu
->header
.addr_size
;
19554 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19558 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19559 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19562 static const char *
19563 read_str_index (struct dwarf2_cu
*cu
,
19564 struct dwarf2_section_info
*str_section
,
19565 struct dwarf2_section_info
*str_offsets_section
,
19566 ULONGEST str_offsets_base
, ULONGEST str_index
)
19568 struct dwarf2_per_objfile
*dwarf2_per_objfile
19569 = cu
->per_cu
->dwarf2_per_objfile
;
19570 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19571 const char *objf_name
= objfile_name (objfile
);
19572 bfd
*abfd
= objfile
->obfd
;
19573 const gdb_byte
*info_ptr
;
19574 ULONGEST str_offset
;
19575 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19577 str_section
->read (objfile
);
19578 str_offsets_section
->read (objfile
);
19579 if (str_section
->buffer
== NULL
)
19580 error (_("%s used without %s section"
19581 " in CU at offset %s [in module %s]"),
19582 form_name
, str_section
->get_name (),
19583 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19584 if (str_offsets_section
->buffer
== NULL
)
19585 error (_("%s used without %s section"
19586 " in CU at offset %s [in module %s]"),
19587 form_name
, str_section
->get_name (),
19588 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19589 info_ptr
= (str_offsets_section
->buffer
19591 + str_index
* cu
->header
.offset_size
);
19592 if (cu
->header
.offset_size
== 4)
19593 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19595 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19596 if (str_offset
>= str_section
->size
)
19597 error (_("Offset from %s pointing outside of"
19598 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19599 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19600 return (const char *) (str_section
->buffer
+ str_offset
);
19603 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19605 static const char *
19606 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19608 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19609 ? reader
->cu
->header
.addr_size
: 0;
19610 return read_str_index (reader
->cu
,
19611 &reader
->dwo_file
->sections
.str
,
19612 &reader
->dwo_file
->sections
.str_offsets
,
19613 str_offsets_base
, str_index
);
19616 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19618 static const char *
19619 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19621 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19622 const char *objf_name
= objfile_name (objfile
);
19623 static const char form_name
[] = "DW_FORM_GNU_str_index";
19624 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19626 if (!cu
->str_offsets_base
.has_value ())
19627 error (_("%s used in Fission stub without %s"
19628 " in CU at offset 0x%lx [in module %s]"),
19629 form_name
, str_offsets_attr_name
,
19630 (long) cu
->header
.offset_size
, objf_name
);
19632 return read_str_index (cu
,
19633 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19634 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19635 *cu
->str_offsets_base
, str_index
);
19638 /* Return the length of an LEB128 number in BUF. */
19641 leb128_size (const gdb_byte
*buf
)
19643 const gdb_byte
*begin
= buf
;
19649 if ((byte
& 128) == 0)
19650 return buf
- begin
;
19655 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19664 cu
->language
= language_c
;
19667 case DW_LANG_C_plus_plus
:
19668 case DW_LANG_C_plus_plus_11
:
19669 case DW_LANG_C_plus_plus_14
:
19670 cu
->language
= language_cplus
;
19673 cu
->language
= language_d
;
19675 case DW_LANG_Fortran77
:
19676 case DW_LANG_Fortran90
:
19677 case DW_LANG_Fortran95
:
19678 case DW_LANG_Fortran03
:
19679 case DW_LANG_Fortran08
:
19680 cu
->language
= language_fortran
;
19683 cu
->language
= language_go
;
19685 case DW_LANG_Mips_Assembler
:
19686 cu
->language
= language_asm
;
19688 case DW_LANG_Ada83
:
19689 case DW_LANG_Ada95
:
19690 cu
->language
= language_ada
;
19692 case DW_LANG_Modula2
:
19693 cu
->language
= language_m2
;
19695 case DW_LANG_Pascal83
:
19696 cu
->language
= language_pascal
;
19699 cu
->language
= language_objc
;
19702 case DW_LANG_Rust_old
:
19703 cu
->language
= language_rust
;
19705 case DW_LANG_Cobol74
:
19706 case DW_LANG_Cobol85
:
19708 cu
->language
= language_minimal
;
19711 cu
->language_defn
= language_def (cu
->language
);
19714 /* Return the named attribute or NULL if not there. */
19716 static struct attribute
*
19717 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19722 struct attribute
*spec
= NULL
;
19724 for (i
= 0; i
< die
->num_attrs
; ++i
)
19726 if (die
->attrs
[i
].name
== name
)
19727 return &die
->attrs
[i
];
19728 if (die
->attrs
[i
].name
== DW_AT_specification
19729 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19730 spec
= &die
->attrs
[i
];
19736 die
= follow_die_ref (die
, spec
, &cu
);
19742 /* Return the named attribute or NULL if not there,
19743 but do not follow DW_AT_specification, etc.
19744 This is for use in contexts where we're reading .debug_types dies.
19745 Following DW_AT_specification, DW_AT_abstract_origin will take us
19746 back up the chain, and we want to go down. */
19748 static struct attribute
*
19749 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19753 for (i
= 0; i
< die
->num_attrs
; ++i
)
19754 if (die
->attrs
[i
].name
== name
)
19755 return &die
->attrs
[i
];
19760 /* Return the string associated with a string-typed attribute, or NULL if it
19761 is either not found or is of an incorrect type. */
19763 static const char *
19764 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19766 struct attribute
*attr
;
19767 const char *str
= NULL
;
19769 attr
= dwarf2_attr (die
, name
, cu
);
19773 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19774 || attr
->form
== DW_FORM_string
19775 || attr
->form
== DW_FORM_strx
19776 || attr
->form
== DW_FORM_strx1
19777 || attr
->form
== DW_FORM_strx2
19778 || attr
->form
== DW_FORM_strx3
19779 || attr
->form
== DW_FORM_strx4
19780 || attr
->form
== DW_FORM_GNU_str_index
19781 || attr
->form
== DW_FORM_GNU_strp_alt
)
19782 str
= DW_STRING (attr
);
19784 complaint (_("string type expected for attribute %s for "
19785 "DIE at %s in module %s"),
19786 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19787 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19793 /* Return the dwo name or NULL if not present. If present, it is in either
19794 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19795 static const char *
19796 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19798 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19799 if (dwo_name
== nullptr)
19800 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19804 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19805 and holds a non-zero value. This function should only be used for
19806 DW_FORM_flag or DW_FORM_flag_present attributes. */
19809 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19811 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19813 return (attr
&& DW_UNSND (attr
));
19817 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19819 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19820 which value is non-zero. However, we have to be careful with
19821 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19822 (via dwarf2_flag_true_p) follows this attribute. So we may
19823 end up accidently finding a declaration attribute that belongs
19824 to a different DIE referenced by the specification attribute,
19825 even though the given DIE does not have a declaration attribute. */
19826 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19827 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19830 /* Return the die giving the specification for DIE, if there is
19831 one. *SPEC_CU is the CU containing DIE on input, and the CU
19832 containing the return value on output. If there is no
19833 specification, but there is an abstract origin, that is
19836 static struct die_info
*
19837 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19839 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19842 if (spec_attr
== NULL
)
19843 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19845 if (spec_attr
== NULL
)
19848 return follow_die_ref (die
, spec_attr
, spec_cu
);
19851 /* Stub for free_line_header to match void * callback types. */
19854 free_line_header_voidp (void *arg
)
19856 struct line_header
*lh
= (struct line_header
*) arg
;
19862 line_header::add_include_dir (const char *include_dir
)
19864 if (dwarf_line_debug
>= 2)
19868 new_size
= m_include_dirs
.size ();
19870 new_size
= m_include_dirs
.size () + 1;
19871 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19872 new_size
, include_dir
);
19874 m_include_dirs
.push_back (include_dir
);
19878 line_header::add_file_name (const char *name
,
19880 unsigned int mod_time
,
19881 unsigned int length
)
19883 if (dwarf_line_debug
>= 2)
19887 new_size
= file_names_size ();
19889 new_size
= file_names_size () + 1;
19890 fprintf_unfiltered (gdb_stdlog
, "Adding file %zu: %s\n",
19893 m_file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19896 /* A convenience function to find the proper .debug_line section for a CU. */
19898 static struct dwarf2_section_info
*
19899 get_debug_line_section (struct dwarf2_cu
*cu
)
19901 struct dwarf2_section_info
*section
;
19902 struct dwarf2_per_objfile
*dwarf2_per_objfile
19903 = cu
->per_cu
->dwarf2_per_objfile
;
19905 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19907 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19908 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19909 else if (cu
->per_cu
->is_dwz
)
19911 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19913 section
= &dwz
->line
;
19916 section
= &dwarf2_per_objfile
->line
;
19921 /* Read directory or file name entry format, starting with byte of
19922 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19923 entries count and the entries themselves in the described entry
19927 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19928 bfd
*abfd
, const gdb_byte
**bufp
,
19929 struct line_header
*lh
,
19930 const struct comp_unit_head
*cu_header
,
19931 void (*callback
) (struct line_header
*lh
,
19934 unsigned int mod_time
,
19935 unsigned int length
))
19937 gdb_byte format_count
, formati
;
19938 ULONGEST data_count
, datai
;
19939 const gdb_byte
*buf
= *bufp
;
19940 const gdb_byte
*format_header_data
;
19941 unsigned int bytes_read
;
19943 format_count
= read_1_byte (abfd
, buf
);
19945 format_header_data
= buf
;
19946 for (formati
= 0; formati
< format_count
; formati
++)
19948 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19950 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19954 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19956 for (datai
= 0; datai
< data_count
; datai
++)
19958 const gdb_byte
*format
= format_header_data
;
19959 struct file_entry fe
;
19961 for (formati
= 0; formati
< format_count
; formati
++)
19963 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19964 format
+= bytes_read
;
19966 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19967 format
+= bytes_read
;
19969 gdb::optional
<const char *> string
;
19970 gdb::optional
<unsigned int> uint
;
19974 case DW_FORM_string
:
19975 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
19979 case DW_FORM_line_strp
:
19980 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
19987 case DW_FORM_data1
:
19988 uint
.emplace (read_1_byte (abfd
, buf
));
19992 case DW_FORM_data2
:
19993 uint
.emplace (read_2_bytes (abfd
, buf
));
19997 case DW_FORM_data4
:
19998 uint
.emplace (read_4_bytes (abfd
, buf
));
20002 case DW_FORM_data8
:
20003 uint
.emplace (read_8_bytes (abfd
, buf
));
20007 case DW_FORM_data16
:
20008 /* This is used for MD5, but file_entry does not record MD5s. */
20012 case DW_FORM_udata
:
20013 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20017 case DW_FORM_block
:
20018 /* It is valid only for DW_LNCT_timestamp which is ignored by
20023 switch (content_type
)
20026 if (string
.has_value ())
20029 case DW_LNCT_directory_index
:
20030 if (uint
.has_value ())
20031 fe
.d_index
= (dir_index
) *uint
;
20033 case DW_LNCT_timestamp
:
20034 if (uint
.has_value ())
20035 fe
.mod_time
= *uint
;
20038 if (uint
.has_value ())
20044 complaint (_("Unknown format content type %s"),
20045 pulongest (content_type
));
20049 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20055 /* Read the statement program header starting at OFFSET in
20056 .debug_line, or .debug_line.dwo. Return a pointer
20057 to a struct line_header, allocated using xmalloc.
20058 Returns NULL if there is a problem reading the header, e.g., if it
20059 has a version we don't understand.
20061 NOTE: the strings in the include directory and file name tables of
20062 the returned object point into the dwarf line section buffer,
20063 and must not be freed. */
20065 static line_header_up
20066 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20068 const gdb_byte
*line_ptr
;
20069 unsigned int bytes_read
, offset_size
;
20071 const char *cur_dir
, *cur_file
;
20072 struct dwarf2_section_info
*section
;
20074 struct dwarf2_per_objfile
*dwarf2_per_objfile
20075 = cu
->per_cu
->dwarf2_per_objfile
;
20077 section
= get_debug_line_section (cu
);
20078 section
->read (dwarf2_per_objfile
->objfile
);
20079 if (section
->buffer
== NULL
)
20081 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20082 complaint (_("missing .debug_line.dwo section"));
20084 complaint (_("missing .debug_line section"));
20088 /* We can't do this until we know the section is non-empty.
20089 Only then do we know we have such a section. */
20090 abfd
= section
->get_bfd_owner ();
20092 /* Make sure that at least there's room for the total_length field.
20093 That could be 12 bytes long, but we're just going to fudge that. */
20094 if (to_underlying (sect_off
) + 4 >= section
->size
)
20096 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20100 line_header_up
lh (new line_header ());
20102 lh
->sect_off
= sect_off
;
20103 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20105 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20107 /* Read in the header. */
20109 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20110 &bytes_read
, &offset_size
);
20111 line_ptr
+= bytes_read
;
20113 const gdb_byte
*start_here
= line_ptr
;
20115 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20117 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20120 lh
->statement_program_end
= start_here
+ lh
->total_length
;
20121 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20123 if (lh
->version
> 5)
20125 /* This is a version we don't understand. The format could have
20126 changed in ways we don't handle properly so just punt. */
20127 complaint (_("unsupported version in .debug_line section"));
20130 if (lh
->version
>= 5)
20132 gdb_byte segment_selector_size
;
20134 /* Skip address size. */
20135 read_1_byte (abfd
, line_ptr
);
20138 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20140 if (segment_selector_size
!= 0)
20142 complaint (_("unsupported segment selector size %u "
20143 "in .debug_line section"),
20144 segment_selector_size
);
20148 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20149 line_ptr
+= offset_size
;
20150 lh
->statement_program_start
= line_ptr
+ lh
->header_length
;
20151 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20153 if (lh
->version
>= 4)
20155 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20159 lh
->maximum_ops_per_instruction
= 1;
20161 if (lh
->maximum_ops_per_instruction
== 0)
20163 lh
->maximum_ops_per_instruction
= 1;
20164 complaint (_("invalid maximum_ops_per_instruction "
20165 "in `.debug_line' section"));
20168 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20170 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20172 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20174 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20176 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20178 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20179 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20181 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20185 if (lh
->version
>= 5)
20187 /* Read directory table. */
20188 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20190 [] (struct line_header
*header
, const char *name
,
20191 dir_index d_index
, unsigned int mod_time
,
20192 unsigned int length
)
20194 header
->add_include_dir (name
);
20197 /* Read file name table. */
20198 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20200 [] (struct line_header
*header
, const char *name
,
20201 dir_index d_index
, unsigned int mod_time
,
20202 unsigned int length
)
20204 header
->add_file_name (name
, d_index
, mod_time
, length
);
20209 /* Read directory table. */
20210 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20212 line_ptr
+= bytes_read
;
20213 lh
->add_include_dir (cur_dir
);
20215 line_ptr
+= bytes_read
;
20217 /* Read file name table. */
20218 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20220 unsigned int mod_time
, length
;
20223 line_ptr
+= bytes_read
;
20224 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20225 line_ptr
+= bytes_read
;
20226 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20227 line_ptr
+= bytes_read
;
20228 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20229 line_ptr
+= bytes_read
;
20231 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20233 line_ptr
+= bytes_read
;
20236 if (line_ptr
> (section
->buffer
+ section
->size
))
20237 complaint (_("line number info header doesn't "
20238 "fit in `.debug_line' section"));
20243 /* Subroutine of dwarf_decode_lines to simplify it.
20244 Return the file name of the psymtab for the given file_entry.
20245 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20246 If space for the result is malloc'd, *NAME_HOLDER will be set.
20247 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20249 static const char *
20250 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
20251 const dwarf2_psymtab
*pst
,
20252 const char *comp_dir
,
20253 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20255 const char *include_name
= fe
.name
;
20256 const char *include_name_to_compare
= include_name
;
20257 const char *pst_filename
;
20260 const char *dir_name
= fe
.include_dir (lh
);
20262 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20263 if (!IS_ABSOLUTE_PATH (include_name
)
20264 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20266 /* Avoid creating a duplicate psymtab for PST.
20267 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20268 Before we do the comparison, however, we need to account
20269 for DIR_NAME and COMP_DIR.
20270 First prepend dir_name (if non-NULL). If we still don't
20271 have an absolute path prepend comp_dir (if non-NULL).
20272 However, the directory we record in the include-file's
20273 psymtab does not contain COMP_DIR (to match the
20274 corresponding symtab(s)).
20279 bash$ gcc -g ./hello.c
20280 include_name = "hello.c"
20282 DW_AT_comp_dir = comp_dir = "/tmp"
20283 DW_AT_name = "./hello.c"
20287 if (dir_name
!= NULL
)
20289 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20290 include_name
, (char *) NULL
));
20291 include_name
= name_holder
->get ();
20292 include_name_to_compare
= include_name
;
20294 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20296 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20297 include_name
, (char *) NULL
));
20298 include_name_to_compare
= hold_compare
.get ();
20302 pst_filename
= pst
->filename
;
20303 gdb::unique_xmalloc_ptr
<char> copied_name
;
20304 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20306 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20307 pst_filename
, (char *) NULL
));
20308 pst_filename
= copied_name
.get ();
20311 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20315 return include_name
;
20318 /* State machine to track the state of the line number program. */
20320 class lnp_state_machine
20323 /* Initialize a machine state for the start of a line number
20325 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20326 bool record_lines_p
);
20328 file_entry
*current_file ()
20330 /* lh->file_names is 0-based, but the file name numbers in the
20331 statement program are 1-based. */
20332 return m_line_header
->file_name_at (m_file
);
20335 /* Record the line in the state machine. END_SEQUENCE is true if
20336 we're processing the end of a sequence. */
20337 void record_line (bool end_sequence
);
20339 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20340 nop-out rest of the lines in this sequence. */
20341 void check_line_address (struct dwarf2_cu
*cu
,
20342 const gdb_byte
*line_ptr
,
20343 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20345 void handle_set_discriminator (unsigned int discriminator
)
20347 m_discriminator
= discriminator
;
20348 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20351 /* Handle DW_LNE_set_address. */
20352 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20355 address
+= baseaddr
;
20356 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20359 /* Handle DW_LNS_advance_pc. */
20360 void handle_advance_pc (CORE_ADDR adjust
);
20362 /* Handle a special opcode. */
20363 void handle_special_opcode (unsigned char op_code
);
20365 /* Handle DW_LNS_advance_line. */
20366 void handle_advance_line (int line_delta
)
20368 advance_line (line_delta
);
20371 /* Handle DW_LNS_set_file. */
20372 void handle_set_file (file_name_index file
);
20374 /* Handle DW_LNS_negate_stmt. */
20375 void handle_negate_stmt ()
20377 m_is_stmt
= !m_is_stmt
;
20380 /* Handle DW_LNS_const_add_pc. */
20381 void handle_const_add_pc ();
20383 /* Handle DW_LNS_fixed_advance_pc. */
20384 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20386 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20390 /* Handle DW_LNS_copy. */
20391 void handle_copy ()
20393 record_line (false);
20394 m_discriminator
= 0;
20397 /* Handle DW_LNE_end_sequence. */
20398 void handle_end_sequence ()
20400 m_currently_recording_lines
= true;
20404 /* Advance the line by LINE_DELTA. */
20405 void advance_line (int line_delta
)
20407 m_line
+= line_delta
;
20409 if (line_delta
!= 0)
20410 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20413 struct dwarf2_cu
*m_cu
;
20415 gdbarch
*m_gdbarch
;
20417 /* True if we're recording lines.
20418 Otherwise we're building partial symtabs and are just interested in
20419 finding include files mentioned by the line number program. */
20420 bool m_record_lines_p
;
20422 /* The line number header. */
20423 line_header
*m_line_header
;
20425 /* These are part of the standard DWARF line number state machine,
20426 and initialized according to the DWARF spec. */
20428 unsigned char m_op_index
= 0;
20429 /* The line table index of the current file. */
20430 file_name_index m_file
= 1;
20431 unsigned int m_line
= 1;
20433 /* These are initialized in the constructor. */
20435 CORE_ADDR m_address
;
20437 unsigned int m_discriminator
;
20439 /* Additional bits of state we need to track. */
20441 /* The last file that we called dwarf2_start_subfile for.
20442 This is only used for TLLs. */
20443 unsigned int m_last_file
= 0;
20444 /* The last file a line number was recorded for. */
20445 struct subfile
*m_last_subfile
= NULL
;
20447 /* When true, record the lines we decode. */
20448 bool m_currently_recording_lines
= false;
20450 /* The last line number that was recorded, used to coalesce
20451 consecutive entries for the same line. This can happen, for
20452 example, when discriminators are present. PR 17276. */
20453 unsigned int m_last_line
= 0;
20454 bool m_line_has_non_zero_discriminator
= false;
20458 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20460 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20461 / m_line_header
->maximum_ops_per_instruction
)
20462 * m_line_header
->minimum_instruction_length
);
20463 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20464 m_op_index
= ((m_op_index
+ adjust
)
20465 % m_line_header
->maximum_ops_per_instruction
);
20469 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20471 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20472 CORE_ADDR addr_adj
= (((m_op_index
20473 + (adj_opcode
/ m_line_header
->line_range
))
20474 / m_line_header
->maximum_ops_per_instruction
)
20475 * m_line_header
->minimum_instruction_length
);
20476 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20477 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20478 % m_line_header
->maximum_ops_per_instruction
);
20480 int line_delta
= (m_line_header
->line_base
20481 + (adj_opcode
% m_line_header
->line_range
));
20482 advance_line (line_delta
);
20483 record_line (false);
20484 m_discriminator
= 0;
20488 lnp_state_machine::handle_set_file (file_name_index file
)
20492 const file_entry
*fe
= current_file ();
20494 dwarf2_debug_line_missing_file_complaint ();
20495 else if (m_record_lines_p
)
20497 const char *dir
= fe
->include_dir (m_line_header
);
20499 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20500 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20501 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20506 lnp_state_machine::handle_const_add_pc ()
20509 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20512 = (((m_op_index
+ adjust
)
20513 / m_line_header
->maximum_ops_per_instruction
)
20514 * m_line_header
->minimum_instruction_length
);
20516 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20517 m_op_index
= ((m_op_index
+ adjust
)
20518 % m_line_header
->maximum_ops_per_instruction
);
20521 /* Return non-zero if we should add LINE to the line number table.
20522 LINE is the line to add, LAST_LINE is the last line that was added,
20523 LAST_SUBFILE is the subfile for LAST_LINE.
20524 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20525 had a non-zero discriminator.
20527 We have to be careful in the presence of discriminators.
20528 E.g., for this line:
20530 for (i = 0; i < 100000; i++);
20532 clang can emit four line number entries for that one line,
20533 each with a different discriminator.
20534 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20536 However, we want gdb to coalesce all four entries into one.
20537 Otherwise the user could stepi into the middle of the line and
20538 gdb would get confused about whether the pc really was in the
20539 middle of the line.
20541 Things are further complicated by the fact that two consecutive
20542 line number entries for the same line is a heuristic used by gcc
20543 to denote the end of the prologue. So we can't just discard duplicate
20544 entries, we have to be selective about it. The heuristic we use is
20545 that we only collapse consecutive entries for the same line if at least
20546 one of those entries has a non-zero discriminator. PR 17276.
20548 Note: Addresses in the line number state machine can never go backwards
20549 within one sequence, thus this coalescing is ok. */
20552 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20553 unsigned int line
, unsigned int last_line
,
20554 int line_has_non_zero_discriminator
,
20555 struct subfile
*last_subfile
)
20557 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20559 if (line
!= last_line
)
20561 /* Same line for the same file that we've seen already.
20562 As a last check, for pr 17276, only record the line if the line
20563 has never had a non-zero discriminator. */
20564 if (!line_has_non_zero_discriminator
)
20569 /* Use the CU's builder to record line number LINE beginning at
20570 address ADDRESS in the line table of subfile SUBFILE. */
20573 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20574 unsigned int line
, CORE_ADDR address
,
20575 struct dwarf2_cu
*cu
)
20577 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20579 if (dwarf_line_debug
)
20581 fprintf_unfiltered (gdb_stdlog
,
20582 "Recording line %u, file %s, address %s\n",
20583 line
, lbasename (subfile
->name
),
20584 paddress (gdbarch
, address
));
20588 cu
->get_builder ()->record_line (subfile
, line
, addr
);
20591 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20592 Mark the end of a set of line number records.
20593 The arguments are the same as for dwarf_record_line_1.
20594 If SUBFILE is NULL the request is ignored. */
20597 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20598 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20600 if (subfile
== NULL
)
20603 if (dwarf_line_debug
)
20605 fprintf_unfiltered (gdb_stdlog
,
20606 "Finishing current line, file %s, address %s\n",
20607 lbasename (subfile
->name
),
20608 paddress (gdbarch
, address
));
20611 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20615 lnp_state_machine::record_line (bool end_sequence
)
20617 if (dwarf_line_debug
)
20619 fprintf_unfiltered (gdb_stdlog
,
20620 "Processing actual line %u: file %u,"
20621 " address %s, is_stmt %u, discrim %u%s\n",
20623 paddress (m_gdbarch
, m_address
),
20624 m_is_stmt
, m_discriminator
,
20625 (end_sequence
? "\t(end sequence)" : ""));
20628 file_entry
*fe
= current_file ();
20631 dwarf2_debug_line_missing_file_complaint ();
20632 /* For now we ignore lines not starting on an instruction boundary.
20633 But not when processing end_sequence for compatibility with the
20634 previous version of the code. */
20635 else if (m_op_index
== 0 || end_sequence
)
20637 fe
->included_p
= 1;
20638 if (m_record_lines_p
20639 && (producer_is_codewarrior (m_cu
) || m_is_stmt
|| end_sequence
))
20641 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20644 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20645 m_currently_recording_lines
? m_cu
: nullptr);
20650 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20651 m_line_has_non_zero_discriminator
,
20654 buildsym_compunit
*builder
= m_cu
->get_builder ();
20655 dwarf_record_line_1 (m_gdbarch
,
20656 builder
->get_current_subfile (),
20658 m_currently_recording_lines
? m_cu
: nullptr);
20660 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20661 m_last_line
= m_line
;
20667 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20668 line_header
*lh
, bool record_lines_p
)
20672 m_record_lines_p
= record_lines_p
;
20673 m_line_header
= lh
;
20675 m_currently_recording_lines
= true;
20677 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20678 was a line entry for it so that the backend has a chance to adjust it
20679 and also record it in case it needs it. This is currently used by MIPS
20680 code, cf. `mips_adjust_dwarf2_line'. */
20681 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20682 m_is_stmt
= lh
->default_is_stmt
;
20683 m_discriminator
= 0;
20687 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20688 const gdb_byte
*line_ptr
,
20689 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20691 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20692 the pc range of the CU. However, we restrict the test to only ADDRESS
20693 values of zero to preserve GDB's previous behaviour which is to handle
20694 the specific case of a function being GC'd by the linker. */
20696 if (address
== 0 && address
< unrelocated_lowpc
)
20698 /* This line table is for a function which has been
20699 GCd by the linker. Ignore it. PR gdb/12528 */
20701 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20702 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20704 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20705 line_offset
, objfile_name (objfile
));
20706 m_currently_recording_lines
= false;
20707 /* Note: m_currently_recording_lines is left as false until we see
20708 DW_LNE_end_sequence. */
20712 /* Subroutine of dwarf_decode_lines to simplify it.
20713 Process the line number information in LH.
20714 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20715 program in order to set included_p for every referenced header. */
20718 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20719 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20721 const gdb_byte
*line_ptr
, *extended_end
;
20722 const gdb_byte
*line_end
;
20723 unsigned int bytes_read
, extended_len
;
20724 unsigned char op_code
, extended_op
;
20725 CORE_ADDR baseaddr
;
20726 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20727 bfd
*abfd
= objfile
->obfd
;
20728 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20729 /* True if we're recording line info (as opposed to building partial
20730 symtabs and just interested in finding include files mentioned by
20731 the line number program). */
20732 bool record_lines_p
= !decode_for_pst_p
;
20734 baseaddr
= objfile
->text_section_offset ();
20736 line_ptr
= lh
->statement_program_start
;
20737 line_end
= lh
->statement_program_end
;
20739 /* Read the statement sequences until there's nothing left. */
20740 while (line_ptr
< line_end
)
20742 /* The DWARF line number program state machine. Reset the state
20743 machine at the start of each sequence. */
20744 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20745 bool end_sequence
= false;
20747 if (record_lines_p
)
20749 /* Start a subfile for the current file of the state
20751 const file_entry
*fe
= state_machine
.current_file ();
20754 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20757 /* Decode the table. */
20758 while (line_ptr
< line_end
&& !end_sequence
)
20760 op_code
= read_1_byte (abfd
, line_ptr
);
20763 if (op_code
>= lh
->opcode_base
)
20765 /* Special opcode. */
20766 state_machine
.handle_special_opcode (op_code
);
20768 else switch (op_code
)
20770 case DW_LNS_extended_op
:
20771 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20773 line_ptr
+= bytes_read
;
20774 extended_end
= line_ptr
+ extended_len
;
20775 extended_op
= read_1_byte (abfd
, line_ptr
);
20777 switch (extended_op
)
20779 case DW_LNE_end_sequence
:
20780 state_machine
.handle_end_sequence ();
20781 end_sequence
= true;
20783 case DW_LNE_set_address
:
20786 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20787 line_ptr
+= bytes_read
;
20789 state_machine
.check_line_address (cu
, line_ptr
,
20790 lowpc
- baseaddr
, address
);
20791 state_machine
.handle_set_address (baseaddr
, address
);
20794 case DW_LNE_define_file
:
20796 const char *cur_file
;
20797 unsigned int mod_time
, length
;
20800 cur_file
= read_direct_string (abfd
, line_ptr
,
20802 line_ptr
+= bytes_read
;
20803 dindex
= (dir_index
)
20804 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20805 line_ptr
+= bytes_read
;
20807 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20808 line_ptr
+= bytes_read
;
20810 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20811 line_ptr
+= bytes_read
;
20812 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20815 case DW_LNE_set_discriminator
:
20817 /* The discriminator is not interesting to the
20818 debugger; just ignore it. We still need to
20819 check its value though:
20820 if there are consecutive entries for the same
20821 (non-prologue) line we want to coalesce them.
20824 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20825 line_ptr
+= bytes_read
;
20827 state_machine
.handle_set_discriminator (discr
);
20831 complaint (_("mangled .debug_line section"));
20834 /* Make sure that we parsed the extended op correctly. If e.g.
20835 we expected a different address size than the producer used,
20836 we may have read the wrong number of bytes. */
20837 if (line_ptr
!= extended_end
)
20839 complaint (_("mangled .debug_line section"));
20844 state_machine
.handle_copy ();
20846 case DW_LNS_advance_pc
:
20849 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20850 line_ptr
+= bytes_read
;
20852 state_machine
.handle_advance_pc (adjust
);
20855 case DW_LNS_advance_line
:
20858 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20859 line_ptr
+= bytes_read
;
20861 state_machine
.handle_advance_line (line_delta
);
20864 case DW_LNS_set_file
:
20866 file_name_index file
20867 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20869 line_ptr
+= bytes_read
;
20871 state_machine
.handle_set_file (file
);
20874 case DW_LNS_set_column
:
20875 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20876 line_ptr
+= bytes_read
;
20878 case DW_LNS_negate_stmt
:
20879 state_machine
.handle_negate_stmt ();
20881 case DW_LNS_set_basic_block
:
20883 /* Add to the address register of the state machine the
20884 address increment value corresponding to special opcode
20885 255. I.e., this value is scaled by the minimum
20886 instruction length since special opcode 255 would have
20887 scaled the increment. */
20888 case DW_LNS_const_add_pc
:
20889 state_machine
.handle_const_add_pc ();
20891 case DW_LNS_fixed_advance_pc
:
20893 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20896 state_machine
.handle_fixed_advance_pc (addr_adj
);
20901 /* Unknown standard opcode, ignore it. */
20904 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20906 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20907 line_ptr
+= bytes_read
;
20914 dwarf2_debug_line_missing_end_sequence_complaint ();
20916 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20917 in which case we still finish recording the last line). */
20918 state_machine
.record_line (true);
20922 /* Decode the Line Number Program (LNP) for the given line_header
20923 structure and CU. The actual information extracted and the type
20924 of structures created from the LNP depends on the value of PST.
20926 1. If PST is NULL, then this procedure uses the data from the program
20927 to create all necessary symbol tables, and their linetables.
20929 2. If PST is not NULL, this procedure reads the program to determine
20930 the list of files included by the unit represented by PST, and
20931 builds all the associated partial symbol tables.
20933 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20934 It is used for relative paths in the line table.
20935 NOTE: When processing partial symtabs (pst != NULL),
20936 comp_dir == pst->dirname.
20938 NOTE: It is important that psymtabs have the same file name (via strcmp)
20939 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20940 symtab we don't use it in the name of the psymtabs we create.
20941 E.g. expand_line_sal requires this when finding psymtabs to expand.
20942 A good testcase for this is mb-inline.exp.
20944 LOWPC is the lowest address in CU (or 0 if not known).
20946 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20947 for its PC<->lines mapping information. Otherwise only the filename
20948 table is read in. */
20951 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20952 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20953 CORE_ADDR lowpc
, int decode_mapping
)
20955 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20956 const int decode_for_pst_p
= (pst
!= NULL
);
20958 if (decode_mapping
)
20959 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20961 if (decode_for_pst_p
)
20963 /* Now that we're done scanning the Line Header Program, we can
20964 create the psymtab of each included file. */
20965 for (auto &file_entry
: lh
->file_names ())
20966 if (file_entry
.included_p
== 1)
20968 gdb::unique_xmalloc_ptr
<char> name_holder
;
20969 const char *include_name
=
20970 psymtab_include_file_name (lh
, file_entry
, pst
,
20971 comp_dir
, &name_holder
);
20972 if (include_name
!= NULL
)
20973 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20978 /* Make sure a symtab is created for every file, even files
20979 which contain only variables (i.e. no code with associated
20981 buildsym_compunit
*builder
= cu
->get_builder ();
20982 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20984 for (auto &fe
: lh
->file_names ())
20986 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20987 if (builder
->get_current_subfile ()->symtab
== NULL
)
20989 builder
->get_current_subfile ()->symtab
20990 = allocate_symtab (cust
,
20991 builder
->get_current_subfile ()->name
);
20993 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20998 /* Start a subfile for DWARF. FILENAME is the name of the file and
20999 DIRNAME the name of the source directory which contains FILENAME
21000 or NULL if not known.
21001 This routine tries to keep line numbers from identical absolute and
21002 relative file names in a common subfile.
21004 Using the `list' example from the GDB testsuite, which resides in
21005 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21006 of /srcdir/list0.c yields the following debugging information for list0.c:
21008 DW_AT_name: /srcdir/list0.c
21009 DW_AT_comp_dir: /compdir
21010 files.files[0].name: list0.h
21011 files.files[0].dir: /srcdir
21012 files.files[1].name: list0.c
21013 files.files[1].dir: /srcdir
21015 The line number information for list0.c has to end up in a single
21016 subfile, so that `break /srcdir/list0.c:1' works as expected.
21017 start_subfile will ensure that this happens provided that we pass the
21018 concatenation of files.files[1].dir and files.files[1].name as the
21022 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21023 const char *dirname
)
21025 gdb::unique_xmalloc_ptr
<char> copy
;
21027 /* In order not to lose the line information directory,
21028 we concatenate it to the filename when it makes sense.
21029 Note that the Dwarf3 standard says (speaking of filenames in line
21030 information): ``The directory index is ignored for file names
21031 that represent full path names''. Thus ignoring dirname in the
21032 `else' branch below isn't an issue. */
21034 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21036 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
21037 filename
= copy
.get ();
21040 cu
->get_builder ()->start_subfile (filename
);
21043 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21044 buildsym_compunit constructor. */
21046 struct compunit_symtab
*
21047 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21050 gdb_assert (m_builder
== nullptr);
21052 m_builder
.reset (new struct buildsym_compunit
21053 (per_cu
->dwarf2_per_objfile
->objfile
,
21054 name
, comp_dir
, language
, low_pc
));
21056 list_in_scope
= get_builder ()->get_file_symbols ();
21058 get_builder ()->record_debugformat ("DWARF 2");
21059 get_builder ()->record_producer (producer
);
21061 processing_has_namespace_info
= false;
21063 return get_builder ()->get_compunit_symtab ();
21067 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21068 struct dwarf2_cu
*cu
)
21070 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21071 struct comp_unit_head
*cu_header
= &cu
->header
;
21073 /* NOTE drow/2003-01-30: There used to be a comment and some special
21074 code here to turn a symbol with DW_AT_external and a
21075 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21076 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21077 with some versions of binutils) where shared libraries could have
21078 relocations against symbols in their debug information - the
21079 minimal symbol would have the right address, but the debug info
21080 would not. It's no longer necessary, because we will explicitly
21081 apply relocations when we read in the debug information now. */
21083 /* A DW_AT_location attribute with no contents indicates that a
21084 variable has been optimized away. */
21085 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
21087 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21091 /* Handle one degenerate form of location expression specially, to
21092 preserve GDB's previous behavior when section offsets are
21093 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21094 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21096 if (attr
->form_is_block ()
21097 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21098 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21099 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21100 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21101 && (DW_BLOCK (attr
)->size
21102 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21104 unsigned int dummy
;
21106 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21107 SET_SYMBOL_VALUE_ADDRESS (sym
,
21108 read_address (objfile
->obfd
,
21109 DW_BLOCK (attr
)->data
+ 1,
21112 SET_SYMBOL_VALUE_ADDRESS
21113 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
21115 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21116 fixup_symbol_section (sym
, objfile
);
21117 SET_SYMBOL_VALUE_ADDRESS
21119 SYMBOL_VALUE_ADDRESS (sym
)
21120 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
21124 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21125 expression evaluator, and use LOC_COMPUTED only when necessary
21126 (i.e. when the value of a register or memory location is
21127 referenced, or a thread-local block, etc.). Then again, it might
21128 not be worthwhile. I'm assuming that it isn't unless performance
21129 or memory numbers show me otherwise. */
21131 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21133 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21134 cu
->has_loclist
= true;
21137 /* Given a pointer to a DWARF information entry, figure out if we need
21138 to make a symbol table entry for it, and if so, create a new entry
21139 and return a pointer to it.
21140 If TYPE is NULL, determine symbol type from the die, otherwise
21141 used the passed type.
21142 If SPACE is not NULL, use it to hold the new symbol. If it is
21143 NULL, allocate a new symbol on the objfile's obstack. */
21145 static struct symbol
*
21146 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21147 struct symbol
*space
)
21149 struct dwarf2_per_objfile
*dwarf2_per_objfile
21150 = cu
->per_cu
->dwarf2_per_objfile
;
21151 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21152 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21153 struct symbol
*sym
= NULL
;
21155 struct attribute
*attr
= NULL
;
21156 struct attribute
*attr2
= NULL
;
21157 CORE_ADDR baseaddr
;
21158 struct pending
**list_to_add
= NULL
;
21160 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21162 baseaddr
= objfile
->text_section_offset ();
21164 name
= dwarf2_name (die
, cu
);
21167 const char *linkagename
;
21168 int suppress_add
= 0;
21173 sym
= allocate_symbol (objfile
);
21174 OBJSTAT (objfile
, n_syms
++);
21176 /* Cache this symbol's name and the name's demangled form (if any). */
21177 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
21178 linkagename
= dwarf2_physname (name
, die
, cu
);
21179 sym
->compute_and_set_names (linkagename
, false, objfile
->per_bfd
);
21181 /* Fortran does not have mangling standard and the mangling does differ
21182 between gfortran, iFort etc. */
21183 if (cu
->language
== language_fortran
21184 && symbol_get_demangled_name (sym
) == NULL
)
21185 symbol_set_demangled_name (sym
,
21186 dwarf2_full_name (name
, die
, cu
),
21189 /* Default assumptions.
21190 Use the passed type or decode it from the die. */
21191 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21192 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21194 SYMBOL_TYPE (sym
) = type
;
21196 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21197 attr
= dwarf2_attr (die
,
21198 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21200 if (attr
!= nullptr)
21202 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21205 attr
= dwarf2_attr (die
,
21206 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21208 if (attr
!= nullptr)
21210 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21211 struct file_entry
*fe
;
21213 if (cu
->line_header
!= NULL
)
21214 fe
= cu
->line_header
->file_name_at (file_index
);
21219 complaint (_("file index out of range"));
21221 symbol_set_symtab (sym
, fe
->symtab
);
21227 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21228 if (attr
!= nullptr)
21232 addr
= attr
->value_as_address ();
21233 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21234 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
21236 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21237 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21238 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21239 add_symbol_to_list (sym
, cu
->list_in_scope
);
21241 case DW_TAG_subprogram
:
21242 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21244 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21245 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21246 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21247 || cu
->language
== language_ada
21248 || cu
->language
== language_fortran
)
21250 /* Subprograms marked external are stored as a global symbol.
21251 Ada and Fortran subprograms, whether marked external or
21252 not, are always stored as a global symbol, because we want
21253 to be able to access them globally. For instance, we want
21254 to be able to break on a nested subprogram without having
21255 to specify the context. */
21256 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21260 list_to_add
= cu
->list_in_scope
;
21263 case DW_TAG_inlined_subroutine
:
21264 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21266 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21267 SYMBOL_INLINED (sym
) = 1;
21268 list_to_add
= cu
->list_in_scope
;
21270 case DW_TAG_template_value_param
:
21272 /* Fall through. */
21273 case DW_TAG_constant
:
21274 case DW_TAG_variable
:
21275 case DW_TAG_member
:
21276 /* Compilation with minimal debug info may result in
21277 variables with missing type entries. Change the
21278 misleading `void' type to something sensible. */
21279 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21280 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21282 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21283 /* In the case of DW_TAG_member, we should only be called for
21284 static const members. */
21285 if (die
->tag
== DW_TAG_member
)
21287 /* dwarf2_add_field uses die_is_declaration,
21288 so we do the same. */
21289 gdb_assert (die_is_declaration (die
, cu
));
21292 if (attr
!= nullptr)
21294 dwarf2_const_value (attr
, sym
, cu
);
21295 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21298 if (attr2
&& (DW_UNSND (attr2
) != 0))
21299 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21301 list_to_add
= cu
->list_in_scope
;
21305 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21306 if (attr
!= nullptr)
21308 var_decode_location (attr
, sym
, cu
);
21309 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21311 /* Fortran explicitly imports any global symbols to the local
21312 scope by DW_TAG_common_block. */
21313 if (cu
->language
== language_fortran
&& die
->parent
21314 && die
->parent
->tag
== DW_TAG_common_block
)
21317 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21318 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21319 && !dwarf2_per_objfile
->has_section_at_zero
)
21321 /* When a static variable is eliminated by the linker,
21322 the corresponding debug information is not stripped
21323 out, but the variable address is set to null;
21324 do not add such variables into symbol table. */
21326 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21328 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21329 && (objfile
->flags
& OBJF_MAINLINE
) == 0
21330 && dwarf2_per_objfile
->can_copy
)
21332 /* A global static variable might be subject to
21333 copy relocation. We first check for a local
21334 minsym, though, because maybe the symbol was
21335 marked hidden, in which case this would not
21337 bound_minimal_symbol found
21338 = (lookup_minimal_symbol_linkage
21339 (sym
->linkage_name (), objfile
));
21340 if (found
.minsym
!= nullptr)
21341 sym
->maybe_copied
= 1;
21344 /* A variable with DW_AT_external is never static,
21345 but it may be block-scoped. */
21347 = ((cu
->list_in_scope
21348 == cu
->get_builder ()->get_file_symbols ())
21349 ? cu
->get_builder ()->get_global_symbols ()
21350 : cu
->list_in_scope
);
21353 list_to_add
= cu
->list_in_scope
;
21357 /* We do not know the address of this symbol.
21358 If it is an external symbol and we have type information
21359 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21360 The address of the variable will then be determined from
21361 the minimal symbol table whenever the variable is
21363 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21365 /* Fortran explicitly imports any global symbols to the local
21366 scope by DW_TAG_common_block. */
21367 if (cu
->language
== language_fortran
&& die
->parent
21368 && die
->parent
->tag
== DW_TAG_common_block
)
21370 /* SYMBOL_CLASS doesn't matter here because
21371 read_common_block is going to reset it. */
21373 list_to_add
= cu
->list_in_scope
;
21375 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21376 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21378 /* A variable with DW_AT_external is never static, but it
21379 may be block-scoped. */
21381 = ((cu
->list_in_scope
21382 == cu
->get_builder ()->get_file_symbols ())
21383 ? cu
->get_builder ()->get_global_symbols ()
21384 : cu
->list_in_scope
);
21386 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21388 else if (!die_is_declaration (die
, cu
))
21390 /* Use the default LOC_OPTIMIZED_OUT class. */
21391 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21393 list_to_add
= cu
->list_in_scope
;
21397 case DW_TAG_formal_parameter
:
21399 /* If we are inside a function, mark this as an argument. If
21400 not, we might be looking at an argument to an inlined function
21401 when we do not have enough information to show inlined frames;
21402 pretend it's a local variable in that case so that the user can
21404 struct context_stack
*curr
21405 = cu
->get_builder ()->get_current_context_stack ();
21406 if (curr
!= nullptr && curr
->name
!= nullptr)
21407 SYMBOL_IS_ARGUMENT (sym
) = 1;
21408 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21409 if (attr
!= nullptr)
21411 var_decode_location (attr
, sym
, cu
);
21413 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21414 if (attr
!= nullptr)
21416 dwarf2_const_value (attr
, sym
, cu
);
21419 list_to_add
= cu
->list_in_scope
;
21422 case DW_TAG_unspecified_parameters
:
21423 /* From varargs functions; gdb doesn't seem to have any
21424 interest in this information, so just ignore it for now.
21427 case DW_TAG_template_type_param
:
21429 /* Fall through. */
21430 case DW_TAG_class_type
:
21431 case DW_TAG_interface_type
:
21432 case DW_TAG_structure_type
:
21433 case DW_TAG_union_type
:
21434 case DW_TAG_set_type
:
21435 case DW_TAG_enumeration_type
:
21436 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21437 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21440 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21441 really ever be static objects: otherwise, if you try
21442 to, say, break of a class's method and you're in a file
21443 which doesn't mention that class, it won't work unless
21444 the check for all static symbols in lookup_symbol_aux
21445 saves you. See the OtherFileClass tests in
21446 gdb.c++/namespace.exp. */
21450 buildsym_compunit
*builder
= cu
->get_builder ();
21452 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21453 && cu
->language
== language_cplus
21454 ? builder
->get_global_symbols ()
21455 : cu
->list_in_scope
);
21457 /* The semantics of C++ state that "struct foo {
21458 ... }" also defines a typedef for "foo". */
21459 if (cu
->language
== language_cplus
21460 || cu
->language
== language_ada
21461 || cu
->language
== language_d
21462 || cu
->language
== language_rust
)
21464 /* The symbol's name is already allocated along
21465 with this objfile, so we don't need to
21466 duplicate it for the type. */
21467 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21468 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
21473 case DW_TAG_typedef
:
21474 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21475 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21476 list_to_add
= cu
->list_in_scope
;
21478 case DW_TAG_base_type
:
21479 case DW_TAG_subrange_type
:
21480 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21481 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21482 list_to_add
= cu
->list_in_scope
;
21484 case DW_TAG_enumerator
:
21485 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21486 if (attr
!= nullptr)
21488 dwarf2_const_value (attr
, sym
, cu
);
21491 /* NOTE: carlton/2003-11-10: See comment above in the
21492 DW_TAG_class_type, etc. block. */
21495 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21496 && cu
->language
== language_cplus
21497 ? cu
->get_builder ()->get_global_symbols ()
21498 : cu
->list_in_scope
);
21501 case DW_TAG_imported_declaration
:
21502 case DW_TAG_namespace
:
21503 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21504 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21506 case DW_TAG_module
:
21507 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21508 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21509 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21511 case DW_TAG_common_block
:
21512 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21513 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21514 add_symbol_to_list (sym
, cu
->list_in_scope
);
21517 /* Not a tag we recognize. Hopefully we aren't processing
21518 trash data, but since we must specifically ignore things
21519 we don't recognize, there is nothing else we should do at
21521 complaint (_("unsupported tag: '%s'"),
21522 dwarf_tag_name (die
->tag
));
21528 sym
->hash_next
= objfile
->template_symbols
;
21529 objfile
->template_symbols
= sym
;
21530 list_to_add
= NULL
;
21533 if (list_to_add
!= NULL
)
21534 add_symbol_to_list (sym
, list_to_add
);
21536 /* For the benefit of old versions of GCC, check for anonymous
21537 namespaces based on the demangled name. */
21538 if (!cu
->processing_has_namespace_info
21539 && cu
->language
== language_cplus
)
21540 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21545 /* Given an attr with a DW_FORM_dataN value in host byte order,
21546 zero-extend it as appropriate for the symbol's type. The DWARF
21547 standard (v4) is not entirely clear about the meaning of using
21548 DW_FORM_dataN for a constant with a signed type, where the type is
21549 wider than the data. The conclusion of a discussion on the DWARF
21550 list was that this is unspecified. We choose to always zero-extend
21551 because that is the interpretation long in use by GCC. */
21554 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21555 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21557 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21558 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21559 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21560 LONGEST l
= DW_UNSND (attr
);
21562 if (bits
< sizeof (*value
) * 8)
21564 l
&= ((LONGEST
) 1 << bits
) - 1;
21567 else if (bits
== sizeof (*value
) * 8)
21571 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21572 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21579 /* Read a constant value from an attribute. Either set *VALUE, or if
21580 the value does not fit in *VALUE, set *BYTES - either already
21581 allocated on the objfile obstack, or newly allocated on OBSTACK,
21582 or, set *BATON, if we translated the constant to a location
21586 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21587 const char *name
, struct obstack
*obstack
,
21588 struct dwarf2_cu
*cu
,
21589 LONGEST
*value
, const gdb_byte
**bytes
,
21590 struct dwarf2_locexpr_baton
**baton
)
21592 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21593 struct comp_unit_head
*cu_header
= &cu
->header
;
21594 struct dwarf_block
*blk
;
21595 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21596 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21602 switch (attr
->form
)
21605 case DW_FORM_addrx
:
21606 case DW_FORM_GNU_addr_index
:
21610 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21611 dwarf2_const_value_length_mismatch_complaint (name
,
21612 cu_header
->addr_size
,
21613 TYPE_LENGTH (type
));
21614 /* Symbols of this form are reasonably rare, so we just
21615 piggyback on the existing location code rather than writing
21616 a new implementation of symbol_computed_ops. */
21617 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21618 (*baton
)->per_cu
= cu
->per_cu
;
21619 gdb_assert ((*baton
)->per_cu
);
21621 (*baton
)->size
= 2 + cu_header
->addr_size
;
21622 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21623 (*baton
)->data
= data
;
21625 data
[0] = DW_OP_addr
;
21626 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21627 byte_order
, DW_ADDR (attr
));
21628 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21631 case DW_FORM_string
:
21634 case DW_FORM_GNU_str_index
:
21635 case DW_FORM_GNU_strp_alt
:
21636 /* DW_STRING is already allocated on the objfile obstack, point
21638 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21640 case DW_FORM_block1
:
21641 case DW_FORM_block2
:
21642 case DW_FORM_block4
:
21643 case DW_FORM_block
:
21644 case DW_FORM_exprloc
:
21645 case DW_FORM_data16
:
21646 blk
= DW_BLOCK (attr
);
21647 if (TYPE_LENGTH (type
) != blk
->size
)
21648 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21649 TYPE_LENGTH (type
));
21650 *bytes
= blk
->data
;
21653 /* The DW_AT_const_value attributes are supposed to carry the
21654 symbol's value "represented as it would be on the target
21655 architecture." By the time we get here, it's already been
21656 converted to host endianness, so we just need to sign- or
21657 zero-extend it as appropriate. */
21658 case DW_FORM_data1
:
21659 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21661 case DW_FORM_data2
:
21662 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21664 case DW_FORM_data4
:
21665 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21667 case DW_FORM_data8
:
21668 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21671 case DW_FORM_sdata
:
21672 case DW_FORM_implicit_const
:
21673 *value
= DW_SND (attr
);
21676 case DW_FORM_udata
:
21677 *value
= DW_UNSND (attr
);
21681 complaint (_("unsupported const value attribute form: '%s'"),
21682 dwarf_form_name (attr
->form
));
21689 /* Copy constant value from an attribute to a symbol. */
21692 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21693 struct dwarf2_cu
*cu
)
21695 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21697 const gdb_byte
*bytes
;
21698 struct dwarf2_locexpr_baton
*baton
;
21700 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21701 sym
->print_name (),
21702 &objfile
->objfile_obstack
, cu
,
21703 &value
, &bytes
, &baton
);
21707 SYMBOL_LOCATION_BATON (sym
) = baton
;
21708 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21710 else if (bytes
!= NULL
)
21712 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21713 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21717 SYMBOL_VALUE (sym
) = value
;
21718 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21722 /* Return the type of the die in question using its DW_AT_type attribute. */
21724 static struct type
*
21725 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21727 struct attribute
*type_attr
;
21729 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21732 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21733 /* A missing DW_AT_type represents a void type. */
21734 return objfile_type (objfile
)->builtin_void
;
21737 return lookup_die_type (die
, type_attr
, cu
);
21740 /* True iff CU's producer generates GNAT Ada auxiliary information
21741 that allows to find parallel types through that information instead
21742 of having to do expensive parallel lookups by type name. */
21745 need_gnat_info (struct dwarf2_cu
*cu
)
21747 /* Assume that the Ada compiler was GNAT, which always produces
21748 the auxiliary information. */
21749 return (cu
->language
== language_ada
);
21752 /* Return the auxiliary type of the die in question using its
21753 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21754 attribute is not present. */
21756 static struct type
*
21757 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21759 struct attribute
*type_attr
;
21761 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21765 return lookup_die_type (die
, type_attr
, cu
);
21768 /* If DIE has a descriptive_type attribute, then set the TYPE's
21769 descriptive type accordingly. */
21772 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21773 struct dwarf2_cu
*cu
)
21775 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21777 if (descriptive_type
)
21779 ALLOCATE_GNAT_AUX_TYPE (type
);
21780 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21784 /* Return the containing type of the die in question using its
21785 DW_AT_containing_type attribute. */
21787 static struct type
*
21788 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21790 struct attribute
*type_attr
;
21791 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21793 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21795 error (_("Dwarf Error: Problem turning containing type into gdb type "
21796 "[in module %s]"), objfile_name (objfile
));
21798 return lookup_die_type (die
, type_attr
, cu
);
21801 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21803 static struct type
*
21804 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21806 struct dwarf2_per_objfile
*dwarf2_per_objfile
21807 = cu
->per_cu
->dwarf2_per_objfile
;
21808 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21811 std::string message
21812 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21813 objfile_name (objfile
),
21814 sect_offset_str (cu
->header
.sect_off
),
21815 sect_offset_str (die
->sect_off
));
21816 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21818 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21821 /* Look up the type of DIE in CU using its type attribute ATTR.
21822 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21823 DW_AT_containing_type.
21824 If there is no type substitute an error marker. */
21826 static struct type
*
21827 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21828 struct dwarf2_cu
*cu
)
21830 struct dwarf2_per_objfile
*dwarf2_per_objfile
21831 = cu
->per_cu
->dwarf2_per_objfile
;
21832 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21833 struct type
*this_type
;
21835 gdb_assert (attr
->name
== DW_AT_type
21836 || attr
->name
== DW_AT_GNAT_descriptive_type
21837 || attr
->name
== DW_AT_containing_type
);
21839 /* First see if we have it cached. */
21841 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21843 struct dwarf2_per_cu_data
*per_cu
;
21844 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21846 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21847 dwarf2_per_objfile
);
21848 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21850 else if (attr
->form_is_ref ())
21852 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21854 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21856 else if (attr
->form
== DW_FORM_ref_sig8
)
21858 ULONGEST signature
= DW_SIGNATURE (attr
);
21860 return get_signatured_type (die
, signature
, cu
);
21864 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21865 " at %s [in module %s]"),
21866 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21867 objfile_name (objfile
));
21868 return build_error_marker_type (cu
, die
);
21871 /* If not cached we need to read it in. */
21873 if (this_type
== NULL
)
21875 struct die_info
*type_die
= NULL
;
21876 struct dwarf2_cu
*type_cu
= cu
;
21878 if (attr
->form_is_ref ())
21879 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21880 if (type_die
== NULL
)
21881 return build_error_marker_type (cu
, die
);
21882 /* If we find the type now, it's probably because the type came
21883 from an inter-CU reference and the type's CU got expanded before
21885 this_type
= read_type_die (type_die
, type_cu
);
21888 /* If we still don't have a type use an error marker. */
21890 if (this_type
== NULL
)
21891 return build_error_marker_type (cu
, die
);
21896 /* Return the type in DIE, CU.
21897 Returns NULL for invalid types.
21899 This first does a lookup in die_type_hash,
21900 and only reads the die in if necessary.
21902 NOTE: This can be called when reading in partial or full symbols. */
21904 static struct type
*
21905 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21907 struct type
*this_type
;
21909 this_type
= get_die_type (die
, cu
);
21913 return read_type_die_1 (die
, cu
);
21916 /* Read the type in DIE, CU.
21917 Returns NULL for invalid types. */
21919 static struct type
*
21920 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21922 struct type
*this_type
= NULL
;
21926 case DW_TAG_class_type
:
21927 case DW_TAG_interface_type
:
21928 case DW_TAG_structure_type
:
21929 case DW_TAG_union_type
:
21930 this_type
= read_structure_type (die
, cu
);
21932 case DW_TAG_enumeration_type
:
21933 this_type
= read_enumeration_type (die
, cu
);
21935 case DW_TAG_subprogram
:
21936 case DW_TAG_subroutine_type
:
21937 case DW_TAG_inlined_subroutine
:
21938 this_type
= read_subroutine_type (die
, cu
);
21940 case DW_TAG_array_type
:
21941 this_type
= read_array_type (die
, cu
);
21943 case DW_TAG_set_type
:
21944 this_type
= read_set_type (die
, cu
);
21946 case DW_TAG_pointer_type
:
21947 this_type
= read_tag_pointer_type (die
, cu
);
21949 case DW_TAG_ptr_to_member_type
:
21950 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21952 case DW_TAG_reference_type
:
21953 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21955 case DW_TAG_rvalue_reference_type
:
21956 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21958 case DW_TAG_const_type
:
21959 this_type
= read_tag_const_type (die
, cu
);
21961 case DW_TAG_volatile_type
:
21962 this_type
= read_tag_volatile_type (die
, cu
);
21964 case DW_TAG_restrict_type
:
21965 this_type
= read_tag_restrict_type (die
, cu
);
21967 case DW_TAG_string_type
:
21968 this_type
= read_tag_string_type (die
, cu
);
21970 case DW_TAG_typedef
:
21971 this_type
= read_typedef (die
, cu
);
21973 case DW_TAG_subrange_type
:
21974 this_type
= read_subrange_type (die
, cu
);
21976 case DW_TAG_base_type
:
21977 this_type
= read_base_type (die
, cu
);
21979 case DW_TAG_unspecified_type
:
21980 this_type
= read_unspecified_type (die
, cu
);
21982 case DW_TAG_namespace
:
21983 this_type
= read_namespace_type (die
, cu
);
21985 case DW_TAG_module
:
21986 this_type
= read_module_type (die
, cu
);
21988 case DW_TAG_atomic_type
:
21989 this_type
= read_tag_atomic_type (die
, cu
);
21992 complaint (_("unexpected tag in read_type_die: '%s'"),
21993 dwarf_tag_name (die
->tag
));
22000 /* See if we can figure out if the class lives in a namespace. We do
22001 this by looking for a member function; its demangled name will
22002 contain namespace info, if there is any.
22003 Return the computed name or NULL.
22004 Space for the result is allocated on the objfile's obstack.
22005 This is the full-die version of guess_partial_die_structure_name.
22006 In this case we know DIE has no useful parent. */
22008 static const char *
22009 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22011 struct die_info
*spec_die
;
22012 struct dwarf2_cu
*spec_cu
;
22013 struct die_info
*child
;
22014 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22017 spec_die
= die_specification (die
, &spec_cu
);
22018 if (spec_die
!= NULL
)
22024 for (child
= die
->child
;
22026 child
= child
->sibling
)
22028 if (child
->tag
== DW_TAG_subprogram
)
22030 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22032 if (linkage_name
!= NULL
)
22034 gdb::unique_xmalloc_ptr
<char> actual_name
22035 (language_class_name_from_physname (cu
->language_defn
,
22037 const char *name
= NULL
;
22039 if (actual_name
!= NULL
)
22041 const char *die_name
= dwarf2_name (die
, cu
);
22043 if (die_name
!= NULL
22044 && strcmp (die_name
, actual_name
.get ()) != 0)
22046 /* Strip off the class name from the full name.
22047 We want the prefix. */
22048 int die_name_len
= strlen (die_name
);
22049 int actual_name_len
= strlen (actual_name
.get ());
22050 const char *ptr
= actual_name
.get ();
22052 /* Test for '::' as a sanity check. */
22053 if (actual_name_len
> die_name_len
+ 2
22054 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
22055 name
= obstack_strndup (
22056 &objfile
->per_bfd
->storage_obstack
,
22057 ptr
, actual_name_len
- die_name_len
- 2);
22068 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22069 prefix part in such case. See
22070 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22072 static const char *
22073 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22075 struct attribute
*attr
;
22078 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22079 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22082 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22085 attr
= dw2_linkage_name_attr (die
, cu
);
22086 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22089 /* dwarf2_name had to be already called. */
22090 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22092 /* Strip the base name, keep any leading namespaces/classes. */
22093 base
= strrchr (DW_STRING (attr
), ':');
22094 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22097 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22098 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22100 &base
[-1] - DW_STRING (attr
));
22103 /* Return the name of the namespace/class that DIE is defined within,
22104 or "" if we can't tell. The caller should not xfree the result.
22106 For example, if we're within the method foo() in the following
22116 then determine_prefix on foo's die will return "N::C". */
22118 static const char *
22119 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22121 struct dwarf2_per_objfile
*dwarf2_per_objfile
22122 = cu
->per_cu
->dwarf2_per_objfile
;
22123 struct die_info
*parent
, *spec_die
;
22124 struct dwarf2_cu
*spec_cu
;
22125 struct type
*parent_type
;
22126 const char *retval
;
22128 if (cu
->language
!= language_cplus
22129 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22130 && cu
->language
!= language_rust
)
22133 retval
= anonymous_struct_prefix (die
, cu
);
22137 /* We have to be careful in the presence of DW_AT_specification.
22138 For example, with GCC 3.4, given the code
22142 // Definition of N::foo.
22146 then we'll have a tree of DIEs like this:
22148 1: DW_TAG_compile_unit
22149 2: DW_TAG_namespace // N
22150 3: DW_TAG_subprogram // declaration of N::foo
22151 4: DW_TAG_subprogram // definition of N::foo
22152 DW_AT_specification // refers to die #3
22154 Thus, when processing die #4, we have to pretend that we're in
22155 the context of its DW_AT_specification, namely the contex of die
22158 spec_die
= die_specification (die
, &spec_cu
);
22159 if (spec_die
== NULL
)
22160 parent
= die
->parent
;
22163 parent
= spec_die
->parent
;
22167 if (parent
== NULL
)
22169 else if (parent
->building_fullname
)
22172 const char *parent_name
;
22174 /* It has been seen on RealView 2.2 built binaries,
22175 DW_TAG_template_type_param types actually _defined_ as
22176 children of the parent class:
22179 template class <class Enum> Class{};
22180 Class<enum E> class_e;
22182 1: DW_TAG_class_type (Class)
22183 2: DW_TAG_enumeration_type (E)
22184 3: DW_TAG_enumerator (enum1:0)
22185 3: DW_TAG_enumerator (enum2:1)
22187 2: DW_TAG_template_type_param
22188 DW_AT_type DW_FORM_ref_udata (E)
22190 Besides being broken debug info, it can put GDB into an
22191 infinite loop. Consider:
22193 When we're building the full name for Class<E>, we'll start
22194 at Class, and go look over its template type parameters,
22195 finding E. We'll then try to build the full name of E, and
22196 reach here. We're now trying to build the full name of E,
22197 and look over the parent DIE for containing scope. In the
22198 broken case, if we followed the parent DIE of E, we'd again
22199 find Class, and once again go look at its template type
22200 arguments, etc., etc. Simply don't consider such parent die
22201 as source-level parent of this die (it can't be, the language
22202 doesn't allow it), and break the loop here. */
22203 name
= dwarf2_name (die
, cu
);
22204 parent_name
= dwarf2_name (parent
, cu
);
22205 complaint (_("template param type '%s' defined within parent '%s'"),
22206 name
? name
: "<unknown>",
22207 parent_name
? parent_name
: "<unknown>");
22211 switch (parent
->tag
)
22213 case DW_TAG_namespace
:
22214 parent_type
= read_type_die (parent
, cu
);
22215 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22216 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22217 Work around this problem here. */
22218 if (cu
->language
== language_cplus
22219 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22221 /* We give a name to even anonymous namespaces. */
22222 return TYPE_NAME (parent_type
);
22223 case DW_TAG_class_type
:
22224 case DW_TAG_interface_type
:
22225 case DW_TAG_structure_type
:
22226 case DW_TAG_union_type
:
22227 case DW_TAG_module
:
22228 parent_type
= read_type_die (parent
, cu
);
22229 if (TYPE_NAME (parent_type
) != NULL
)
22230 return TYPE_NAME (parent_type
);
22232 /* An anonymous structure is only allowed non-static data
22233 members; no typedefs, no member functions, et cetera.
22234 So it does not need a prefix. */
22236 case DW_TAG_compile_unit
:
22237 case DW_TAG_partial_unit
:
22238 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22239 if (cu
->language
== language_cplus
22240 && !dwarf2_per_objfile
->types
.empty ()
22241 && die
->child
!= NULL
22242 && (die
->tag
== DW_TAG_class_type
22243 || die
->tag
== DW_TAG_structure_type
22244 || die
->tag
== DW_TAG_union_type
))
22246 const char *name
= guess_full_die_structure_name (die
, cu
);
22251 case DW_TAG_subprogram
:
22252 /* Nested subroutines in Fortran get a prefix with the name
22253 of the parent's subroutine. */
22254 if (cu
->language
== language_fortran
)
22256 if ((die
->tag
== DW_TAG_subprogram
)
22257 && (dwarf2_name (parent
, cu
) != NULL
))
22258 return dwarf2_name (parent
, cu
);
22260 return determine_prefix (parent
, cu
);
22261 case DW_TAG_enumeration_type
:
22262 parent_type
= read_type_die (parent
, cu
);
22263 if (TYPE_DECLARED_CLASS (parent_type
))
22265 if (TYPE_NAME (parent_type
) != NULL
)
22266 return TYPE_NAME (parent_type
);
22269 /* Fall through. */
22271 return determine_prefix (parent
, cu
);
22275 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22276 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22277 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22278 an obconcat, otherwise allocate storage for the result. The CU argument is
22279 used to determine the language and hence, the appropriate separator. */
22281 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22284 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22285 int physname
, struct dwarf2_cu
*cu
)
22287 const char *lead
= "";
22290 if (suffix
== NULL
|| suffix
[0] == '\0'
22291 || prefix
== NULL
|| prefix
[0] == '\0')
22293 else if (cu
->language
== language_d
)
22295 /* For D, the 'main' function could be defined in any module, but it
22296 should never be prefixed. */
22297 if (strcmp (suffix
, "D main") == 0)
22305 else if (cu
->language
== language_fortran
&& physname
)
22307 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22308 DW_AT_MIPS_linkage_name is preferred and used instead. */
22316 if (prefix
== NULL
)
22318 if (suffix
== NULL
)
22325 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22327 strcpy (retval
, lead
);
22328 strcat (retval
, prefix
);
22329 strcat (retval
, sep
);
22330 strcat (retval
, suffix
);
22335 /* We have an obstack. */
22336 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22340 /* Return sibling of die, NULL if no sibling. */
22342 static struct die_info
*
22343 sibling_die (struct die_info
*die
)
22345 return die
->sibling
;
22348 /* Get name of a die, return NULL if not found. */
22350 static const char *
22351 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22352 struct obstack
*obstack
)
22354 if (name
&& cu
->language
== language_cplus
)
22356 std::string canon_name
= cp_canonicalize_string (name
);
22358 if (!canon_name
.empty ())
22360 if (canon_name
!= name
)
22361 name
= obstack_strdup (obstack
, canon_name
);
22368 /* Get name of a die, return NULL if not found.
22369 Anonymous namespaces are converted to their magic string. */
22371 static const char *
22372 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22374 struct attribute
*attr
;
22375 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22377 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22378 if ((!attr
|| !DW_STRING (attr
))
22379 && die
->tag
!= DW_TAG_namespace
22380 && die
->tag
!= DW_TAG_class_type
22381 && die
->tag
!= DW_TAG_interface_type
22382 && die
->tag
!= DW_TAG_structure_type
22383 && die
->tag
!= DW_TAG_union_type
)
22388 case DW_TAG_compile_unit
:
22389 case DW_TAG_partial_unit
:
22390 /* Compilation units have a DW_AT_name that is a filename, not
22391 a source language identifier. */
22392 case DW_TAG_enumeration_type
:
22393 case DW_TAG_enumerator
:
22394 /* These tags always have simple identifiers already; no need
22395 to canonicalize them. */
22396 return DW_STRING (attr
);
22398 case DW_TAG_namespace
:
22399 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22400 return DW_STRING (attr
);
22401 return CP_ANONYMOUS_NAMESPACE_STR
;
22403 case DW_TAG_class_type
:
22404 case DW_TAG_interface_type
:
22405 case DW_TAG_structure_type
:
22406 case DW_TAG_union_type
:
22407 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22408 structures or unions. These were of the form "._%d" in GCC 4.1,
22409 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22410 and GCC 4.4. We work around this problem by ignoring these. */
22411 if (attr
&& DW_STRING (attr
)
22412 && (startswith (DW_STRING (attr
), "._")
22413 || startswith (DW_STRING (attr
), "<anonymous")))
22416 /* GCC might emit a nameless typedef that has a linkage name. See
22417 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22418 if (!attr
|| DW_STRING (attr
) == NULL
)
22420 attr
= dw2_linkage_name_attr (die
, cu
);
22421 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22424 /* Avoid demangling DW_STRING (attr) the second time on a second
22425 call for the same DIE. */
22426 if (!DW_STRING_IS_CANONICAL (attr
))
22428 gdb::unique_xmalloc_ptr
<char> demangled
22429 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
22433 /* FIXME: we already did this for the partial symbol... */
22435 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
22437 DW_STRING_IS_CANONICAL (attr
) = 1;
22439 /* Strip any leading namespaces/classes, keep only the base name.
22440 DW_AT_name for named DIEs does not contain the prefixes. */
22441 base
= strrchr (DW_STRING (attr
), ':');
22442 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22445 return DW_STRING (attr
);
22454 if (!DW_STRING_IS_CANONICAL (attr
))
22457 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22458 &objfile
->per_bfd
->storage_obstack
);
22459 DW_STRING_IS_CANONICAL (attr
) = 1;
22461 return DW_STRING (attr
);
22464 /* Return the die that this die in an extension of, or NULL if there
22465 is none. *EXT_CU is the CU containing DIE on input, and the CU
22466 containing the return value on output. */
22468 static struct die_info
*
22469 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22471 struct attribute
*attr
;
22473 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22477 return follow_die_ref (die
, attr
, ext_cu
);
22480 /* A convenience function that returns an "unknown" DWARF name,
22481 including the value of V. STR is the name of the entity being
22482 printed, e.g., "TAG". */
22484 static const char *
22485 dwarf_unknown (const char *str
, unsigned v
)
22487 char *cell
= get_print_cell ();
22488 xsnprintf (cell
, PRINT_CELL_SIZE
, "DW_%s_<unknown: %u>", str
, v
);
22492 /* Convert a DIE tag into its string name. */
22494 static const char *
22495 dwarf_tag_name (unsigned tag
)
22497 const char *name
= get_DW_TAG_name (tag
);
22500 return dwarf_unknown ("TAG", tag
);
22505 /* Convert a DWARF attribute code into its string name. */
22507 static const char *
22508 dwarf_attr_name (unsigned attr
)
22512 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22513 if (attr
== DW_AT_MIPS_fde
)
22514 return "DW_AT_MIPS_fde";
22516 if (attr
== DW_AT_HP_block_index
)
22517 return "DW_AT_HP_block_index";
22520 name
= get_DW_AT_name (attr
);
22523 return dwarf_unknown ("AT", attr
);
22528 /* Convert a unit type to corresponding DW_UT name. */
22530 static const char *
22531 dwarf_unit_type_name (int unit_type
) {
22535 return "DW_UT_compile (0x01)";
22537 return "DW_UT_type (0x02)";
22539 return "DW_UT_partial (0x03)";
22541 return "DW_UT_skeleton (0x04)";
22543 return "DW_UT_split_compile (0x05)";
22545 return "DW_UT_split_type (0x06)";
22547 return "DW_UT_lo_user (0x80)";
22549 return "DW_UT_hi_user (0xff)";
22555 /* Convert a DWARF value form code into its string name. */
22557 static const char *
22558 dwarf_form_name (unsigned form
)
22560 const char *name
= get_DW_FORM_name (form
);
22563 return dwarf_unknown ("FORM", form
);
22568 static const char *
22569 dwarf_bool_name (unsigned mybool
)
22577 /* Convert a DWARF type code into its string name. */
22579 static const char *
22580 dwarf_type_encoding_name (unsigned enc
)
22582 const char *name
= get_DW_ATE_name (enc
);
22585 return dwarf_unknown ("ATE", enc
);
22591 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22595 print_spaces (indent
, f
);
22596 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22597 dwarf_tag_name (die
->tag
), die
->abbrev
,
22598 sect_offset_str (die
->sect_off
));
22600 if (die
->parent
!= NULL
)
22602 print_spaces (indent
, f
);
22603 fprintf_unfiltered (f
, " parent at offset: %s\n",
22604 sect_offset_str (die
->parent
->sect_off
));
22607 print_spaces (indent
, f
);
22608 fprintf_unfiltered (f
, " has children: %s\n",
22609 dwarf_bool_name (die
->child
!= NULL
));
22611 print_spaces (indent
, f
);
22612 fprintf_unfiltered (f
, " attributes:\n");
22614 for (i
= 0; i
< die
->num_attrs
; ++i
)
22616 print_spaces (indent
, f
);
22617 fprintf_unfiltered (f
, " %s (%s) ",
22618 dwarf_attr_name (die
->attrs
[i
].name
),
22619 dwarf_form_name (die
->attrs
[i
].form
));
22621 switch (die
->attrs
[i
].form
)
22624 case DW_FORM_addrx
:
22625 case DW_FORM_GNU_addr_index
:
22626 fprintf_unfiltered (f
, "address: ");
22627 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22629 case DW_FORM_block2
:
22630 case DW_FORM_block4
:
22631 case DW_FORM_block
:
22632 case DW_FORM_block1
:
22633 fprintf_unfiltered (f
, "block: size %s",
22634 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22636 case DW_FORM_exprloc
:
22637 fprintf_unfiltered (f
, "expression: size %s",
22638 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22640 case DW_FORM_data16
:
22641 fprintf_unfiltered (f
, "constant of 16 bytes");
22643 case DW_FORM_ref_addr
:
22644 fprintf_unfiltered (f
, "ref address: ");
22645 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22647 case DW_FORM_GNU_ref_alt
:
22648 fprintf_unfiltered (f
, "alt ref address: ");
22649 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22655 case DW_FORM_ref_udata
:
22656 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22657 (long) (DW_UNSND (&die
->attrs
[i
])));
22659 case DW_FORM_data1
:
22660 case DW_FORM_data2
:
22661 case DW_FORM_data4
:
22662 case DW_FORM_data8
:
22663 case DW_FORM_udata
:
22664 case DW_FORM_sdata
:
22665 fprintf_unfiltered (f
, "constant: %s",
22666 pulongest (DW_UNSND (&die
->attrs
[i
])));
22668 case DW_FORM_sec_offset
:
22669 fprintf_unfiltered (f
, "section offset: %s",
22670 pulongest (DW_UNSND (&die
->attrs
[i
])));
22672 case DW_FORM_ref_sig8
:
22673 fprintf_unfiltered (f
, "signature: %s",
22674 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22676 case DW_FORM_string
:
22678 case DW_FORM_line_strp
:
22680 case DW_FORM_GNU_str_index
:
22681 case DW_FORM_GNU_strp_alt
:
22682 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22683 DW_STRING (&die
->attrs
[i
])
22684 ? DW_STRING (&die
->attrs
[i
]) : "",
22685 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22688 if (DW_UNSND (&die
->attrs
[i
]))
22689 fprintf_unfiltered (f
, "flag: TRUE");
22691 fprintf_unfiltered (f
, "flag: FALSE");
22693 case DW_FORM_flag_present
:
22694 fprintf_unfiltered (f
, "flag: TRUE");
22696 case DW_FORM_indirect
:
22697 /* The reader will have reduced the indirect form to
22698 the "base form" so this form should not occur. */
22699 fprintf_unfiltered (f
,
22700 "unexpected attribute form: DW_FORM_indirect");
22702 case DW_FORM_implicit_const
:
22703 fprintf_unfiltered (f
, "constant: %s",
22704 plongest (DW_SND (&die
->attrs
[i
])));
22707 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22708 die
->attrs
[i
].form
);
22711 fprintf_unfiltered (f
, "\n");
22716 dump_die_for_error (struct die_info
*die
)
22718 dump_die_shallow (gdb_stderr
, 0, die
);
22722 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22724 int indent
= level
* 4;
22726 gdb_assert (die
!= NULL
);
22728 if (level
>= max_level
)
22731 dump_die_shallow (f
, indent
, die
);
22733 if (die
->child
!= NULL
)
22735 print_spaces (indent
, f
);
22736 fprintf_unfiltered (f
, " Children:");
22737 if (level
+ 1 < max_level
)
22739 fprintf_unfiltered (f
, "\n");
22740 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22744 fprintf_unfiltered (f
,
22745 " [not printed, max nesting level reached]\n");
22749 if (die
->sibling
!= NULL
&& level
> 0)
22751 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22755 /* This is called from the pdie macro in gdbinit.in.
22756 It's not static so gcc will keep a copy callable from gdb. */
22759 dump_die (struct die_info
*die
, int max_level
)
22761 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22765 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22769 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22770 to_underlying (die
->sect_off
),
22776 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22780 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22782 if (attr
->form_is_ref ())
22783 return (sect_offset
) DW_UNSND (attr
);
22785 complaint (_("unsupported die ref attribute form: '%s'"),
22786 dwarf_form_name (attr
->form
));
22790 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22791 * the value held by the attribute is not constant. */
22794 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22796 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22797 return DW_SND (attr
);
22798 else if (attr
->form
== DW_FORM_udata
22799 || attr
->form
== DW_FORM_data1
22800 || attr
->form
== DW_FORM_data2
22801 || attr
->form
== DW_FORM_data4
22802 || attr
->form
== DW_FORM_data8
)
22803 return DW_UNSND (attr
);
22806 /* For DW_FORM_data16 see attribute::form_is_constant. */
22807 complaint (_("Attribute value is not a constant (%s)"),
22808 dwarf_form_name (attr
->form
));
22809 return default_value
;
22813 /* Follow reference or signature attribute ATTR of SRC_DIE.
22814 On entry *REF_CU is the CU of SRC_DIE.
22815 On exit *REF_CU is the CU of the result. */
22817 static struct die_info
*
22818 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22819 struct dwarf2_cu
**ref_cu
)
22821 struct die_info
*die
;
22823 if (attr
->form_is_ref ())
22824 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22825 else if (attr
->form
== DW_FORM_ref_sig8
)
22826 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22829 dump_die_for_error (src_die
);
22830 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22831 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22837 /* Follow reference OFFSET.
22838 On entry *REF_CU is the CU of the source die referencing OFFSET.
22839 On exit *REF_CU is the CU of the result.
22840 Returns NULL if OFFSET is invalid. */
22842 static struct die_info
*
22843 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22844 struct dwarf2_cu
**ref_cu
)
22846 struct die_info temp_die
;
22847 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22848 struct dwarf2_per_objfile
*dwarf2_per_objfile
22849 = cu
->per_cu
->dwarf2_per_objfile
;
22851 gdb_assert (cu
->per_cu
!= NULL
);
22855 if (cu
->per_cu
->is_debug_types
)
22857 /* .debug_types CUs cannot reference anything outside their CU.
22858 If they need to, they have to reference a signatured type via
22859 DW_FORM_ref_sig8. */
22860 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22863 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22864 || !offset_in_cu_p (&cu
->header
, sect_off
))
22866 struct dwarf2_per_cu_data
*per_cu
;
22868 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22869 dwarf2_per_objfile
);
22871 /* If necessary, add it to the queue and load its DIEs. */
22872 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22873 load_full_comp_unit (per_cu
, false, cu
->language
);
22875 target_cu
= per_cu
->cu
;
22877 else if (cu
->dies
== NULL
)
22879 /* We're loading full DIEs during partial symbol reading. */
22880 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22881 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22884 *ref_cu
= target_cu
;
22885 temp_die
.sect_off
= sect_off
;
22887 if (target_cu
!= cu
)
22888 target_cu
->ancestor
= cu
;
22890 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22892 to_underlying (sect_off
));
22895 /* Follow reference attribute ATTR of SRC_DIE.
22896 On entry *REF_CU is the CU of SRC_DIE.
22897 On exit *REF_CU is the CU of the result. */
22899 static struct die_info
*
22900 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22901 struct dwarf2_cu
**ref_cu
)
22903 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22904 struct dwarf2_cu
*cu
= *ref_cu
;
22905 struct die_info
*die
;
22907 die
= follow_die_offset (sect_off
,
22908 (attr
->form
== DW_FORM_GNU_ref_alt
22909 || cu
->per_cu
->is_dwz
),
22912 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22913 "at %s [in module %s]"),
22914 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22915 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22920 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22921 Returned value is intended for DW_OP_call*. Returned
22922 dwarf2_locexpr_baton->data has lifetime of
22923 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22925 struct dwarf2_locexpr_baton
22926 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22927 struct dwarf2_per_cu_data
*per_cu
,
22928 CORE_ADDR (*get_frame_pc
) (void *baton
),
22929 void *baton
, bool resolve_abstract_p
)
22931 struct dwarf2_cu
*cu
;
22932 struct die_info
*die
;
22933 struct attribute
*attr
;
22934 struct dwarf2_locexpr_baton retval
;
22935 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22936 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22938 if (per_cu
->cu
== NULL
)
22939 load_cu (per_cu
, false);
22943 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22944 Instead just throw an error, not much else we can do. */
22945 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22946 sect_offset_str (sect_off
), objfile_name (objfile
));
22949 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22951 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22952 sect_offset_str (sect_off
), objfile_name (objfile
));
22954 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22955 if (!attr
&& resolve_abstract_p
22956 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22957 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22959 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22960 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22961 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
22963 for (const auto &cand_off
22964 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22966 struct dwarf2_cu
*cand_cu
= cu
;
22967 struct die_info
*cand
22968 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22971 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22974 CORE_ADDR pc_low
, pc_high
;
22975 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22976 if (pc_low
== ((CORE_ADDR
) -1))
22978 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22979 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22980 if (!(pc_low
<= pc
&& pc
< pc_high
))
22984 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22991 /* DWARF: "If there is no such attribute, then there is no effect.".
22992 DATA is ignored if SIZE is 0. */
22994 retval
.data
= NULL
;
22997 else if (attr
->form_is_section_offset ())
22999 struct dwarf2_loclist_baton loclist_baton
;
23000 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23003 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23005 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23007 retval
.size
= size
;
23011 if (!attr
->form_is_block ())
23012 error (_("Dwarf Error: DIE at %s referenced in module %s "
23013 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23014 sect_offset_str (sect_off
), objfile_name (objfile
));
23016 retval
.data
= DW_BLOCK (attr
)->data
;
23017 retval
.size
= DW_BLOCK (attr
)->size
;
23019 retval
.per_cu
= cu
->per_cu
;
23021 age_cached_comp_units (dwarf2_per_objfile
);
23026 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23029 struct dwarf2_locexpr_baton
23030 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23031 struct dwarf2_per_cu_data
*per_cu
,
23032 CORE_ADDR (*get_frame_pc
) (void *baton
),
23035 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23037 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23040 /* Write a constant of a given type as target-ordered bytes into
23043 static const gdb_byte
*
23044 write_constant_as_bytes (struct obstack
*obstack
,
23045 enum bfd_endian byte_order
,
23052 *len
= TYPE_LENGTH (type
);
23053 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23054 store_unsigned_integer (result
, *len
, byte_order
, value
);
23059 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23060 pointer to the constant bytes and set LEN to the length of the
23061 data. If memory is needed, allocate it on OBSTACK. If the DIE
23062 does not have a DW_AT_const_value, return NULL. */
23065 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23066 struct dwarf2_per_cu_data
*per_cu
,
23067 struct obstack
*obstack
,
23070 struct dwarf2_cu
*cu
;
23071 struct die_info
*die
;
23072 struct attribute
*attr
;
23073 const gdb_byte
*result
= NULL
;
23076 enum bfd_endian byte_order
;
23077 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23079 if (per_cu
->cu
== NULL
)
23080 load_cu (per_cu
, false);
23084 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23085 Instead just throw an error, not much else we can do. */
23086 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23087 sect_offset_str (sect_off
), objfile_name (objfile
));
23090 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23092 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23093 sect_offset_str (sect_off
), objfile_name (objfile
));
23095 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23099 byte_order
= (bfd_big_endian (objfile
->obfd
)
23100 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23102 switch (attr
->form
)
23105 case DW_FORM_addrx
:
23106 case DW_FORM_GNU_addr_index
:
23110 *len
= cu
->header
.addr_size
;
23111 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23112 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23116 case DW_FORM_string
:
23119 case DW_FORM_GNU_str_index
:
23120 case DW_FORM_GNU_strp_alt
:
23121 /* DW_STRING is already allocated on the objfile obstack, point
23123 result
= (const gdb_byte
*) DW_STRING (attr
);
23124 *len
= strlen (DW_STRING (attr
));
23126 case DW_FORM_block1
:
23127 case DW_FORM_block2
:
23128 case DW_FORM_block4
:
23129 case DW_FORM_block
:
23130 case DW_FORM_exprloc
:
23131 case DW_FORM_data16
:
23132 result
= DW_BLOCK (attr
)->data
;
23133 *len
= DW_BLOCK (attr
)->size
;
23136 /* The DW_AT_const_value attributes are supposed to carry the
23137 symbol's value "represented as it would be on the target
23138 architecture." By the time we get here, it's already been
23139 converted to host endianness, so we just need to sign- or
23140 zero-extend it as appropriate. */
23141 case DW_FORM_data1
:
23142 type
= die_type (die
, cu
);
23143 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23144 if (result
== NULL
)
23145 result
= write_constant_as_bytes (obstack
, byte_order
,
23148 case DW_FORM_data2
:
23149 type
= die_type (die
, cu
);
23150 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23151 if (result
== NULL
)
23152 result
= write_constant_as_bytes (obstack
, byte_order
,
23155 case DW_FORM_data4
:
23156 type
= die_type (die
, cu
);
23157 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23158 if (result
== NULL
)
23159 result
= write_constant_as_bytes (obstack
, byte_order
,
23162 case DW_FORM_data8
:
23163 type
= die_type (die
, cu
);
23164 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23165 if (result
== NULL
)
23166 result
= write_constant_as_bytes (obstack
, byte_order
,
23170 case DW_FORM_sdata
:
23171 case DW_FORM_implicit_const
:
23172 type
= die_type (die
, cu
);
23173 result
= write_constant_as_bytes (obstack
, byte_order
,
23174 type
, DW_SND (attr
), len
);
23177 case DW_FORM_udata
:
23178 type
= die_type (die
, cu
);
23179 result
= write_constant_as_bytes (obstack
, byte_order
,
23180 type
, DW_UNSND (attr
), len
);
23184 complaint (_("unsupported const value attribute form: '%s'"),
23185 dwarf_form_name (attr
->form
));
23192 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23193 valid type for this die is found. */
23196 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23197 struct dwarf2_per_cu_data
*per_cu
)
23199 struct dwarf2_cu
*cu
;
23200 struct die_info
*die
;
23202 if (per_cu
->cu
== NULL
)
23203 load_cu (per_cu
, false);
23208 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23212 return die_type (die
, cu
);
23215 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23219 dwarf2_get_die_type (cu_offset die_offset
,
23220 struct dwarf2_per_cu_data
*per_cu
)
23222 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23223 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23226 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23227 On entry *REF_CU is the CU of SRC_DIE.
23228 On exit *REF_CU is the CU of the result.
23229 Returns NULL if the referenced DIE isn't found. */
23231 static struct die_info
*
23232 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23233 struct dwarf2_cu
**ref_cu
)
23235 struct die_info temp_die
;
23236 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23237 struct die_info
*die
;
23239 /* While it might be nice to assert sig_type->type == NULL here,
23240 we can get here for DW_AT_imported_declaration where we need
23241 the DIE not the type. */
23243 /* If necessary, add it to the queue and load its DIEs. */
23245 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23246 read_signatured_type (sig_type
);
23248 sig_cu
= sig_type
->per_cu
.cu
;
23249 gdb_assert (sig_cu
!= NULL
);
23250 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23251 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23252 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23253 to_underlying (temp_die
.sect_off
));
23256 struct dwarf2_per_objfile
*dwarf2_per_objfile
23257 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23259 /* For .gdb_index version 7 keep track of included TUs.
23260 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23261 if (dwarf2_per_objfile
->index_table
!= NULL
23262 && dwarf2_per_objfile
->index_table
->version
<= 7)
23264 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
23269 sig_cu
->ancestor
= cu
;
23277 /* Follow signatured type referenced by ATTR in SRC_DIE.
23278 On entry *REF_CU is the CU of SRC_DIE.
23279 On exit *REF_CU is the CU of the result.
23280 The result is the DIE of the type.
23281 If the referenced type cannot be found an error is thrown. */
23283 static struct die_info
*
23284 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23285 struct dwarf2_cu
**ref_cu
)
23287 ULONGEST signature
= DW_SIGNATURE (attr
);
23288 struct signatured_type
*sig_type
;
23289 struct die_info
*die
;
23291 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23293 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23294 /* sig_type will be NULL if the signatured type is missing from
23296 if (sig_type
== NULL
)
23298 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23299 " from DIE at %s [in module %s]"),
23300 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23301 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23304 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23307 dump_die_for_error (src_die
);
23308 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23309 " from DIE at %s [in module %s]"),
23310 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23311 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23317 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23318 reading in and processing the type unit if necessary. */
23320 static struct type
*
23321 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23322 struct dwarf2_cu
*cu
)
23324 struct dwarf2_per_objfile
*dwarf2_per_objfile
23325 = cu
->per_cu
->dwarf2_per_objfile
;
23326 struct signatured_type
*sig_type
;
23327 struct dwarf2_cu
*type_cu
;
23328 struct die_info
*type_die
;
23331 sig_type
= lookup_signatured_type (cu
, signature
);
23332 /* sig_type will be NULL if the signatured type is missing from
23334 if (sig_type
== NULL
)
23336 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23337 " from DIE at %s [in module %s]"),
23338 hex_string (signature
), sect_offset_str (die
->sect_off
),
23339 objfile_name (dwarf2_per_objfile
->objfile
));
23340 return build_error_marker_type (cu
, die
);
23343 /* If we already know the type we're done. */
23344 if (sig_type
->type
!= NULL
)
23345 return sig_type
->type
;
23348 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23349 if (type_die
!= NULL
)
23351 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23352 is created. This is important, for example, because for c++ classes
23353 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23354 type
= read_type_die (type_die
, type_cu
);
23357 complaint (_("Dwarf Error: Cannot build signatured type %s"
23358 " referenced from DIE at %s [in module %s]"),
23359 hex_string (signature
), sect_offset_str (die
->sect_off
),
23360 objfile_name (dwarf2_per_objfile
->objfile
));
23361 type
= build_error_marker_type (cu
, die
);
23366 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23367 " from DIE at %s [in module %s]"),
23368 hex_string (signature
), sect_offset_str (die
->sect_off
),
23369 objfile_name (dwarf2_per_objfile
->objfile
));
23370 type
= build_error_marker_type (cu
, die
);
23372 sig_type
->type
= type
;
23377 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23378 reading in and processing the type unit if necessary. */
23380 static struct type
*
23381 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23382 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23384 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23385 if (attr
->form_is_ref ())
23387 struct dwarf2_cu
*type_cu
= cu
;
23388 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23390 return read_type_die (type_die
, type_cu
);
23392 else if (attr
->form
== DW_FORM_ref_sig8
)
23394 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23398 struct dwarf2_per_objfile
*dwarf2_per_objfile
23399 = cu
->per_cu
->dwarf2_per_objfile
;
23401 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23402 " at %s [in module %s]"),
23403 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23404 objfile_name (dwarf2_per_objfile
->objfile
));
23405 return build_error_marker_type (cu
, die
);
23409 /* Load the DIEs associated with type unit PER_CU into memory. */
23412 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23414 struct signatured_type
*sig_type
;
23416 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23417 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23419 /* We have the per_cu, but we need the signatured_type.
23420 Fortunately this is an easy translation. */
23421 gdb_assert (per_cu
->is_debug_types
);
23422 sig_type
= (struct signatured_type
*) per_cu
;
23424 gdb_assert (per_cu
->cu
== NULL
);
23426 read_signatured_type (sig_type
);
23428 gdb_assert (per_cu
->cu
!= NULL
);
23431 /* Read in a signatured type and build its CU and DIEs.
23432 If the type is a stub for the real type in a DWO file,
23433 read in the real type from the DWO file as well. */
23436 read_signatured_type (struct signatured_type
*sig_type
)
23438 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23440 gdb_assert (per_cu
->is_debug_types
);
23441 gdb_assert (per_cu
->cu
== NULL
);
23443 cutu_reader
reader (per_cu
, NULL
, 0, 1, false);
23445 if (!reader
.dummy_p
)
23447 struct dwarf2_cu
*cu
= reader
.cu
;
23448 const gdb_byte
*info_ptr
= reader
.info_ptr
;
23450 gdb_assert (cu
->die_hash
== NULL
);
23452 htab_create_alloc_ex (cu
->header
.length
/ 12,
23456 &cu
->comp_unit_obstack
,
23457 hashtab_obstack_allocate
,
23458 dummy_obstack_deallocate
);
23460 if (reader
.comp_unit_die
->has_children
)
23461 reader
.comp_unit_die
->child
23462 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
23463 reader
.comp_unit_die
);
23464 cu
->dies
= reader
.comp_unit_die
;
23465 /* comp_unit_die is not stored in die_hash, no need. */
23467 /* We try not to read any attributes in this function, because
23468 not all CUs needed for references have been loaded yet, and
23469 symbol table processing isn't initialized. But we have to
23470 set the CU language, or we won't be able to build types
23471 correctly. Similarly, if we do not read the producer, we can
23472 not apply producer-specific interpretation. */
23473 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23476 sig_type
->per_cu
.tu_read
= 1;
23479 /* Decode simple location descriptions.
23480 Given a pointer to a dwarf block that defines a location, compute
23481 the location and return the value.
23483 NOTE drow/2003-11-18: This function is called in two situations
23484 now: for the address of static or global variables (partial symbols
23485 only) and for offsets into structures which are expected to be
23486 (more or less) constant. The partial symbol case should go away,
23487 and only the constant case should remain. That will let this
23488 function complain more accurately. A few special modes are allowed
23489 without complaint for global variables (for instance, global
23490 register values and thread-local values).
23492 A location description containing no operations indicates that the
23493 object is optimized out. The return value is 0 for that case.
23494 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23495 callers will only want a very basic result and this can become a
23498 Note that stack[0] is unused except as a default error return. */
23501 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23503 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23505 size_t size
= blk
->size
;
23506 const gdb_byte
*data
= blk
->data
;
23507 CORE_ADDR stack
[64];
23509 unsigned int bytes_read
, unsnd
;
23515 stack
[++stacki
] = 0;
23554 stack
[++stacki
] = op
- DW_OP_lit0
;
23589 stack
[++stacki
] = op
- DW_OP_reg0
;
23591 dwarf2_complex_location_expr_complaint ();
23595 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23597 stack
[++stacki
] = unsnd
;
23599 dwarf2_complex_location_expr_complaint ();
23603 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23608 case DW_OP_const1u
:
23609 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23613 case DW_OP_const1s
:
23614 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23618 case DW_OP_const2u
:
23619 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23623 case DW_OP_const2s
:
23624 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23628 case DW_OP_const4u
:
23629 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23633 case DW_OP_const4s
:
23634 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23638 case DW_OP_const8u
:
23639 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23644 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23650 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23655 stack
[stacki
+ 1] = stack
[stacki
];
23660 stack
[stacki
- 1] += stack
[stacki
];
23664 case DW_OP_plus_uconst
:
23665 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23671 stack
[stacki
- 1] -= stack
[stacki
];
23676 /* If we're not the last op, then we definitely can't encode
23677 this using GDB's address_class enum. This is valid for partial
23678 global symbols, although the variable's address will be bogus
23681 dwarf2_complex_location_expr_complaint ();
23684 case DW_OP_GNU_push_tls_address
:
23685 case DW_OP_form_tls_address
:
23686 /* The top of the stack has the offset from the beginning
23687 of the thread control block at which the variable is located. */
23688 /* Nothing should follow this operator, so the top of stack would
23690 /* This is valid for partial global symbols, but the variable's
23691 address will be bogus in the psymtab. Make it always at least
23692 non-zero to not look as a variable garbage collected by linker
23693 which have DW_OP_addr 0. */
23695 dwarf2_complex_location_expr_complaint ();
23699 case DW_OP_GNU_uninit
:
23703 case DW_OP_GNU_addr_index
:
23704 case DW_OP_GNU_const_index
:
23705 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23712 const char *name
= get_DW_OP_name (op
);
23715 complaint (_("unsupported stack op: '%s'"),
23718 complaint (_("unsupported stack op: '%02x'"),
23722 return (stack
[stacki
]);
23725 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23726 outside of the allocated space. Also enforce minimum>0. */
23727 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23729 complaint (_("location description stack overflow"));
23735 complaint (_("location description stack underflow"));
23739 return (stack
[stacki
]);
23742 /* memory allocation interface */
23744 static struct dwarf_block
*
23745 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23747 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23750 static struct die_info
*
23751 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23753 struct die_info
*die
;
23754 size_t size
= sizeof (struct die_info
);
23757 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23759 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23760 memset (die
, 0, sizeof (struct die_info
));
23765 /* Macro support. */
23767 /* Return file name relative to the compilation directory of file number I in
23768 *LH's file name table. The result is allocated using xmalloc; the caller is
23769 responsible for freeing it. */
23772 file_file_name (int file
, struct line_header
*lh
)
23774 /* Is the file number a valid index into the line header's file name
23775 table? Remember that file numbers start with one, not zero. */
23776 if (lh
->is_valid_file_index (file
))
23778 const file_entry
*fe
= lh
->file_name_at (file
);
23780 if (!IS_ABSOLUTE_PATH (fe
->name
))
23782 const char *dir
= fe
->include_dir (lh
);
23784 return concat (dir
, SLASH_STRING
, fe
->name
, (char *) NULL
);
23786 return xstrdup (fe
->name
);
23790 /* The compiler produced a bogus file number. We can at least
23791 record the macro definitions made in the file, even if we
23792 won't be able to find the file by name. */
23793 char fake_name
[80];
23795 xsnprintf (fake_name
, sizeof (fake_name
),
23796 "<bad macro file number %d>", file
);
23798 complaint (_("bad file number in macro information (%d)"),
23801 return xstrdup (fake_name
);
23805 /* Return the full name of file number I in *LH's file name table.
23806 Use COMP_DIR as the name of the current directory of the
23807 compilation. The result is allocated using xmalloc; the caller is
23808 responsible for freeing it. */
23810 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23812 /* Is the file number a valid index into the line header's file name
23813 table? Remember that file numbers start with one, not zero. */
23814 if (lh
->is_valid_file_index (file
))
23816 char *relative
= file_file_name (file
, lh
);
23818 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23820 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23821 relative
, (char *) NULL
);
23824 return file_file_name (file
, lh
);
23828 static struct macro_source_file
*
23829 macro_start_file (struct dwarf2_cu
*cu
,
23830 int file
, int line
,
23831 struct macro_source_file
*current_file
,
23832 struct line_header
*lh
)
23834 /* File name relative to the compilation directory of this source file. */
23835 char *file_name
= file_file_name (file
, lh
);
23837 if (! current_file
)
23839 /* Note: We don't create a macro table for this compilation unit
23840 at all until we actually get a filename. */
23841 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
23843 /* If we have no current file, then this must be the start_file
23844 directive for the compilation unit's main source file. */
23845 current_file
= macro_set_main (macro_table
, file_name
);
23846 macro_define_special (macro_table
);
23849 current_file
= macro_include (current_file
, line
, file_name
);
23853 return current_file
;
23856 static const char *
23857 consume_improper_spaces (const char *p
, const char *body
)
23861 complaint (_("macro definition contains spaces "
23862 "in formal argument list:\n`%s'"),
23874 parse_macro_definition (struct macro_source_file
*file
, int line
,
23879 /* The body string takes one of two forms. For object-like macro
23880 definitions, it should be:
23882 <macro name> " " <definition>
23884 For function-like macro definitions, it should be:
23886 <macro name> "() " <definition>
23888 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23890 Spaces may appear only where explicitly indicated, and in the
23893 The Dwarf 2 spec says that an object-like macro's name is always
23894 followed by a space, but versions of GCC around March 2002 omit
23895 the space when the macro's definition is the empty string.
23897 The Dwarf 2 spec says that there should be no spaces between the
23898 formal arguments in a function-like macro's formal argument list,
23899 but versions of GCC around March 2002 include spaces after the
23903 /* Find the extent of the macro name. The macro name is terminated
23904 by either a space or null character (for an object-like macro) or
23905 an opening paren (for a function-like macro). */
23906 for (p
= body
; *p
; p
++)
23907 if (*p
== ' ' || *p
== '(')
23910 if (*p
== ' ' || *p
== '\0')
23912 /* It's an object-like macro. */
23913 int name_len
= p
- body
;
23914 std::string
name (body
, name_len
);
23915 const char *replacement
;
23918 replacement
= body
+ name_len
+ 1;
23921 dwarf2_macro_malformed_definition_complaint (body
);
23922 replacement
= body
+ name_len
;
23925 macro_define_object (file
, line
, name
.c_str (), replacement
);
23927 else if (*p
== '(')
23929 /* It's a function-like macro. */
23930 std::string
name (body
, p
- body
);
23933 char **argv
= XNEWVEC (char *, argv_size
);
23937 p
= consume_improper_spaces (p
, body
);
23939 /* Parse the formal argument list. */
23940 while (*p
&& *p
!= ')')
23942 /* Find the extent of the current argument name. */
23943 const char *arg_start
= p
;
23945 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23948 if (! *p
|| p
== arg_start
)
23949 dwarf2_macro_malformed_definition_complaint (body
);
23952 /* Make sure argv has room for the new argument. */
23953 if (argc
>= argv_size
)
23956 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23959 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23962 p
= consume_improper_spaces (p
, body
);
23964 /* Consume the comma, if present. */
23969 p
= consume_improper_spaces (p
, body
);
23978 /* Perfectly formed definition, no complaints. */
23979 macro_define_function (file
, line
, name
.c_str (),
23980 argc
, (const char **) argv
,
23982 else if (*p
== '\0')
23984 /* Complain, but do define it. */
23985 dwarf2_macro_malformed_definition_complaint (body
);
23986 macro_define_function (file
, line
, name
.c_str (),
23987 argc
, (const char **) argv
,
23991 /* Just complain. */
23992 dwarf2_macro_malformed_definition_complaint (body
);
23995 /* Just complain. */
23996 dwarf2_macro_malformed_definition_complaint (body
);
24001 for (i
= 0; i
< argc
; i
++)
24007 dwarf2_macro_malformed_definition_complaint (body
);
24010 /* Skip some bytes from BYTES according to the form given in FORM.
24011 Returns the new pointer. */
24013 static const gdb_byte
*
24014 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24015 enum dwarf_form form
,
24016 unsigned int offset_size
,
24017 struct dwarf2_section_info
*section
)
24019 unsigned int bytes_read
;
24023 case DW_FORM_data1
:
24028 case DW_FORM_data2
:
24032 case DW_FORM_data4
:
24036 case DW_FORM_data8
:
24040 case DW_FORM_data16
:
24044 case DW_FORM_string
:
24045 read_direct_string (abfd
, bytes
, &bytes_read
);
24046 bytes
+= bytes_read
;
24049 case DW_FORM_sec_offset
:
24051 case DW_FORM_GNU_strp_alt
:
24052 bytes
+= offset_size
;
24055 case DW_FORM_block
:
24056 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24057 bytes
+= bytes_read
;
24060 case DW_FORM_block1
:
24061 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24063 case DW_FORM_block2
:
24064 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24066 case DW_FORM_block4
:
24067 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24070 case DW_FORM_addrx
:
24071 case DW_FORM_sdata
:
24073 case DW_FORM_udata
:
24074 case DW_FORM_GNU_addr_index
:
24075 case DW_FORM_GNU_str_index
:
24076 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24079 dwarf2_section_buffer_overflow_complaint (section
);
24084 case DW_FORM_implicit_const
:
24089 complaint (_("invalid form 0x%x in `%s'"),
24090 form
, section
->get_name ());
24098 /* A helper for dwarf_decode_macros that handles skipping an unknown
24099 opcode. Returns an updated pointer to the macro data buffer; or,
24100 on error, issues a complaint and returns NULL. */
24102 static const gdb_byte
*
24103 skip_unknown_opcode (unsigned int opcode
,
24104 const gdb_byte
**opcode_definitions
,
24105 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24107 unsigned int offset_size
,
24108 struct dwarf2_section_info
*section
)
24110 unsigned int bytes_read
, i
;
24112 const gdb_byte
*defn
;
24114 if (opcode_definitions
[opcode
] == NULL
)
24116 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24121 defn
= opcode_definitions
[opcode
];
24122 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24123 defn
+= bytes_read
;
24125 for (i
= 0; i
< arg
; ++i
)
24127 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24128 (enum dwarf_form
) defn
[i
], offset_size
,
24130 if (mac_ptr
== NULL
)
24132 /* skip_form_bytes already issued the complaint. */
24140 /* A helper function which parses the header of a macro section.
24141 If the macro section is the extended (for now called "GNU") type,
24142 then this updates *OFFSET_SIZE. Returns a pointer to just after
24143 the header, or issues a complaint and returns NULL on error. */
24145 static const gdb_byte
*
24146 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24148 const gdb_byte
*mac_ptr
,
24149 unsigned int *offset_size
,
24150 int section_is_gnu
)
24152 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24154 if (section_is_gnu
)
24156 unsigned int version
, flags
;
24158 version
= read_2_bytes (abfd
, mac_ptr
);
24159 if (version
!= 4 && version
!= 5)
24161 complaint (_("unrecognized version `%d' in .debug_macro section"),
24167 flags
= read_1_byte (abfd
, mac_ptr
);
24169 *offset_size
= (flags
& 1) ? 8 : 4;
24171 if ((flags
& 2) != 0)
24172 /* We don't need the line table offset. */
24173 mac_ptr
+= *offset_size
;
24175 /* Vendor opcode descriptions. */
24176 if ((flags
& 4) != 0)
24178 unsigned int i
, count
;
24180 count
= read_1_byte (abfd
, mac_ptr
);
24182 for (i
= 0; i
< count
; ++i
)
24184 unsigned int opcode
, bytes_read
;
24187 opcode
= read_1_byte (abfd
, mac_ptr
);
24189 opcode_definitions
[opcode
] = mac_ptr
;
24190 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24191 mac_ptr
+= bytes_read
;
24200 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24201 including DW_MACRO_import. */
24204 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24206 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24207 struct macro_source_file
*current_file
,
24208 struct line_header
*lh
,
24209 struct dwarf2_section_info
*section
,
24210 int section_is_gnu
, int section_is_dwz
,
24211 unsigned int offset_size
,
24212 htab_t include_hash
)
24214 struct dwarf2_per_objfile
*dwarf2_per_objfile
24215 = cu
->per_cu
->dwarf2_per_objfile
;
24216 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24217 enum dwarf_macro_record_type macinfo_type
;
24218 int at_commandline
;
24219 const gdb_byte
*opcode_definitions
[256];
24221 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24222 &offset_size
, section_is_gnu
);
24223 if (mac_ptr
== NULL
)
24225 /* We already issued a complaint. */
24229 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24230 GDB is still reading the definitions from command line. First
24231 DW_MACINFO_start_file will need to be ignored as it was already executed
24232 to create CURRENT_FILE for the main source holding also the command line
24233 definitions. On first met DW_MACINFO_start_file this flag is reset to
24234 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24236 at_commandline
= 1;
24240 /* Do we at least have room for a macinfo type byte? */
24241 if (mac_ptr
>= mac_end
)
24243 dwarf2_section_buffer_overflow_complaint (section
);
24247 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24250 /* Note that we rely on the fact that the corresponding GNU and
24251 DWARF constants are the same. */
24253 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24254 switch (macinfo_type
)
24256 /* A zero macinfo type indicates the end of the macro
24261 case DW_MACRO_define
:
24262 case DW_MACRO_undef
:
24263 case DW_MACRO_define_strp
:
24264 case DW_MACRO_undef_strp
:
24265 case DW_MACRO_define_sup
:
24266 case DW_MACRO_undef_sup
:
24268 unsigned int bytes_read
;
24273 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24274 mac_ptr
+= bytes_read
;
24276 if (macinfo_type
== DW_MACRO_define
24277 || macinfo_type
== DW_MACRO_undef
)
24279 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24280 mac_ptr
+= bytes_read
;
24284 LONGEST str_offset
;
24286 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24287 mac_ptr
+= offset_size
;
24289 if (macinfo_type
== DW_MACRO_define_sup
24290 || macinfo_type
== DW_MACRO_undef_sup
24293 struct dwz_file
*dwz
24294 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24296 body
= read_indirect_string_from_dwz (objfile
,
24300 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24304 is_define
= (macinfo_type
== DW_MACRO_define
24305 || macinfo_type
== DW_MACRO_define_strp
24306 || macinfo_type
== DW_MACRO_define_sup
);
24307 if (! current_file
)
24309 /* DWARF violation as no main source is present. */
24310 complaint (_("debug info with no main source gives macro %s "
24312 is_define
? _("definition") : _("undefinition"),
24316 if ((line
== 0 && !at_commandline
)
24317 || (line
!= 0 && at_commandline
))
24318 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24319 at_commandline
? _("command-line") : _("in-file"),
24320 is_define
? _("definition") : _("undefinition"),
24321 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24325 /* Fedora's rpm-build's "debugedit" binary
24326 corrupted .debug_macro sections.
24329 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24330 complaint (_("debug info gives %s invalid macro %s "
24331 "without body (corrupted?) at line %d "
24333 at_commandline
? _("command-line") : _("in-file"),
24334 is_define
? _("definition") : _("undefinition"),
24335 line
, current_file
->filename
);
24337 else if (is_define
)
24338 parse_macro_definition (current_file
, line
, body
);
24341 gdb_assert (macinfo_type
== DW_MACRO_undef
24342 || macinfo_type
== DW_MACRO_undef_strp
24343 || macinfo_type
== DW_MACRO_undef_sup
);
24344 macro_undef (current_file
, line
, body
);
24349 case DW_MACRO_start_file
:
24351 unsigned int bytes_read
;
24354 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24355 mac_ptr
+= bytes_read
;
24356 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24357 mac_ptr
+= bytes_read
;
24359 if ((line
== 0 && !at_commandline
)
24360 || (line
!= 0 && at_commandline
))
24361 complaint (_("debug info gives source %d included "
24362 "from %s at %s line %d"),
24363 file
, at_commandline
? _("command-line") : _("file"),
24364 line
== 0 ? _("zero") : _("non-zero"), line
);
24366 if (at_commandline
)
24368 /* This DW_MACRO_start_file was executed in the
24370 at_commandline
= 0;
24373 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24378 case DW_MACRO_end_file
:
24379 if (! current_file
)
24380 complaint (_("macro debug info has an unmatched "
24381 "`close_file' directive"));
24384 current_file
= current_file
->included_by
;
24385 if (! current_file
)
24387 enum dwarf_macro_record_type next_type
;
24389 /* GCC circa March 2002 doesn't produce the zero
24390 type byte marking the end of the compilation
24391 unit. Complain if it's not there, but exit no
24394 /* Do we at least have room for a macinfo type byte? */
24395 if (mac_ptr
>= mac_end
)
24397 dwarf2_section_buffer_overflow_complaint (section
);
24401 /* We don't increment mac_ptr here, so this is just
24404 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24406 if (next_type
!= 0)
24407 complaint (_("no terminating 0-type entry for "
24408 "macros in `.debug_macinfo' section"));
24415 case DW_MACRO_import
:
24416 case DW_MACRO_import_sup
:
24420 bfd
*include_bfd
= abfd
;
24421 struct dwarf2_section_info
*include_section
= section
;
24422 const gdb_byte
*include_mac_end
= mac_end
;
24423 int is_dwz
= section_is_dwz
;
24424 const gdb_byte
*new_mac_ptr
;
24426 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24427 mac_ptr
+= offset_size
;
24429 if (macinfo_type
== DW_MACRO_import_sup
)
24431 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24433 dwz
->macro
.read (objfile
);
24435 include_section
= &dwz
->macro
;
24436 include_bfd
= include_section
->get_bfd_owner ();
24437 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24441 new_mac_ptr
= include_section
->buffer
+ offset
;
24442 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24446 /* This has actually happened; see
24447 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24448 complaint (_("recursive DW_MACRO_import in "
24449 ".debug_macro section"));
24453 *slot
= (void *) new_mac_ptr
;
24455 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24456 include_mac_end
, current_file
, lh
,
24457 section
, section_is_gnu
, is_dwz
,
24458 offset_size
, include_hash
);
24460 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24465 case DW_MACINFO_vendor_ext
:
24466 if (!section_is_gnu
)
24468 unsigned int bytes_read
;
24470 /* This reads the constant, but since we don't recognize
24471 any vendor extensions, we ignore it. */
24472 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24473 mac_ptr
+= bytes_read
;
24474 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24475 mac_ptr
+= bytes_read
;
24477 /* We don't recognize any vendor extensions. */
24483 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24484 mac_ptr
, mac_end
, abfd
, offset_size
,
24486 if (mac_ptr
== NULL
)
24491 } while (macinfo_type
!= 0);
24495 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24496 int section_is_gnu
)
24498 struct dwarf2_per_objfile
*dwarf2_per_objfile
24499 = cu
->per_cu
->dwarf2_per_objfile
;
24500 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24501 struct line_header
*lh
= cu
->line_header
;
24503 const gdb_byte
*mac_ptr
, *mac_end
;
24504 struct macro_source_file
*current_file
= 0;
24505 enum dwarf_macro_record_type macinfo_type
;
24506 unsigned int offset_size
= cu
->header
.offset_size
;
24507 const gdb_byte
*opcode_definitions
[256];
24509 struct dwarf2_section_info
*section
;
24510 const char *section_name
;
24512 if (cu
->dwo_unit
!= NULL
)
24514 if (section_is_gnu
)
24516 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24517 section_name
= ".debug_macro.dwo";
24521 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24522 section_name
= ".debug_macinfo.dwo";
24527 if (section_is_gnu
)
24529 section
= &dwarf2_per_objfile
->macro
;
24530 section_name
= ".debug_macro";
24534 section
= &dwarf2_per_objfile
->macinfo
;
24535 section_name
= ".debug_macinfo";
24539 section
->read (objfile
);
24540 if (section
->buffer
== NULL
)
24542 complaint (_("missing %s section"), section_name
);
24545 abfd
= section
->get_bfd_owner ();
24547 /* First pass: Find the name of the base filename.
24548 This filename is needed in order to process all macros whose definition
24549 (or undefinition) comes from the command line. These macros are defined
24550 before the first DW_MACINFO_start_file entry, and yet still need to be
24551 associated to the base file.
24553 To determine the base file name, we scan the macro definitions until we
24554 reach the first DW_MACINFO_start_file entry. We then initialize
24555 CURRENT_FILE accordingly so that any macro definition found before the
24556 first DW_MACINFO_start_file can still be associated to the base file. */
24558 mac_ptr
= section
->buffer
+ offset
;
24559 mac_end
= section
->buffer
+ section
->size
;
24561 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24562 &offset_size
, section_is_gnu
);
24563 if (mac_ptr
== NULL
)
24565 /* We already issued a complaint. */
24571 /* Do we at least have room for a macinfo type byte? */
24572 if (mac_ptr
>= mac_end
)
24574 /* Complaint is printed during the second pass as GDB will probably
24575 stop the first pass earlier upon finding
24576 DW_MACINFO_start_file. */
24580 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24583 /* Note that we rely on the fact that the corresponding GNU and
24584 DWARF constants are the same. */
24586 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24587 switch (macinfo_type
)
24589 /* A zero macinfo type indicates the end of the macro
24594 case DW_MACRO_define
:
24595 case DW_MACRO_undef
:
24596 /* Only skip the data by MAC_PTR. */
24598 unsigned int bytes_read
;
24600 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24601 mac_ptr
+= bytes_read
;
24602 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24603 mac_ptr
+= bytes_read
;
24607 case DW_MACRO_start_file
:
24609 unsigned int bytes_read
;
24612 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24613 mac_ptr
+= bytes_read
;
24614 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24615 mac_ptr
+= bytes_read
;
24617 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24621 case DW_MACRO_end_file
:
24622 /* No data to skip by MAC_PTR. */
24625 case DW_MACRO_define_strp
:
24626 case DW_MACRO_undef_strp
:
24627 case DW_MACRO_define_sup
:
24628 case DW_MACRO_undef_sup
:
24630 unsigned int bytes_read
;
24632 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24633 mac_ptr
+= bytes_read
;
24634 mac_ptr
+= offset_size
;
24638 case DW_MACRO_import
:
24639 case DW_MACRO_import_sup
:
24640 /* Note that, according to the spec, a transparent include
24641 chain cannot call DW_MACRO_start_file. So, we can just
24642 skip this opcode. */
24643 mac_ptr
+= offset_size
;
24646 case DW_MACINFO_vendor_ext
:
24647 /* Only skip the data by MAC_PTR. */
24648 if (!section_is_gnu
)
24650 unsigned int bytes_read
;
24652 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24653 mac_ptr
+= bytes_read
;
24654 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24655 mac_ptr
+= bytes_read
;
24660 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24661 mac_ptr
, mac_end
, abfd
, offset_size
,
24663 if (mac_ptr
== NULL
)
24668 } while (macinfo_type
!= 0 && current_file
== NULL
);
24670 /* Second pass: Process all entries.
24672 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24673 command-line macro definitions/undefinitions. This flag is unset when we
24674 reach the first DW_MACINFO_start_file entry. */
24676 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24678 NULL
, xcalloc
, xfree
));
24679 mac_ptr
= section
->buffer
+ offset
;
24680 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24681 *slot
= (void *) mac_ptr
;
24682 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
24683 current_file
, lh
, section
,
24684 section_is_gnu
, 0, offset_size
,
24685 include_hash
.get ());
24688 /* Return the .debug_loc section to use for CU.
24689 For DWO files use .debug_loc.dwo. */
24691 static struct dwarf2_section_info
*
24692 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24694 struct dwarf2_per_objfile
*dwarf2_per_objfile
24695 = cu
->per_cu
->dwarf2_per_objfile
;
24699 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24701 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24703 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24704 : &dwarf2_per_objfile
->loc
);
24707 /* A helper function that fills in a dwarf2_loclist_baton. */
24710 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24711 struct dwarf2_loclist_baton
*baton
,
24712 const struct attribute
*attr
)
24714 struct dwarf2_per_objfile
*dwarf2_per_objfile
24715 = cu
->per_cu
->dwarf2_per_objfile
;
24716 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24718 section
->read (dwarf2_per_objfile
->objfile
);
24720 baton
->per_cu
= cu
->per_cu
;
24721 gdb_assert (baton
->per_cu
);
24722 /* We don't know how long the location list is, but make sure we
24723 don't run off the edge of the section. */
24724 baton
->size
= section
->size
- DW_UNSND (attr
);
24725 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24726 baton
->base_address
= cu
->base_address
;
24727 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24731 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24732 struct dwarf2_cu
*cu
, int is_block
)
24734 struct dwarf2_per_objfile
*dwarf2_per_objfile
24735 = cu
->per_cu
->dwarf2_per_objfile
;
24736 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24737 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24739 if (attr
->form_is_section_offset ()
24740 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24741 the section. If so, fall through to the complaint in the
24743 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24745 struct dwarf2_loclist_baton
*baton
;
24747 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24749 fill_in_loclist_baton (cu
, baton
, attr
);
24751 if (cu
->base_known
== 0)
24752 complaint (_("Location list used without "
24753 "specifying the CU base address."));
24755 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24756 ? dwarf2_loclist_block_index
24757 : dwarf2_loclist_index
);
24758 SYMBOL_LOCATION_BATON (sym
) = baton
;
24762 struct dwarf2_locexpr_baton
*baton
;
24764 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24765 baton
->per_cu
= cu
->per_cu
;
24766 gdb_assert (baton
->per_cu
);
24768 if (attr
->form_is_block ())
24770 /* Note that we're just copying the block's data pointer
24771 here, not the actual data. We're still pointing into the
24772 info_buffer for SYM's objfile; right now we never release
24773 that buffer, but when we do clean up properly this may
24775 baton
->size
= DW_BLOCK (attr
)->size
;
24776 baton
->data
= DW_BLOCK (attr
)->data
;
24780 dwarf2_invalid_attrib_class_complaint ("location description",
24781 sym
->natural_name ());
24785 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24786 ? dwarf2_locexpr_block_index
24787 : dwarf2_locexpr_index
);
24788 SYMBOL_LOCATION_BATON (sym
) = baton
;
24792 /* Return the OBJFILE associated with the compilation unit CU. If CU
24793 came from a separate debuginfo file, then the master objfile is
24797 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24799 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24801 /* Return the master objfile, so that we can report and look up the
24802 correct file containing this variable. */
24803 if (objfile
->separate_debug_objfile_backlink
)
24804 objfile
= objfile
->separate_debug_objfile_backlink
;
24809 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24810 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24811 CU_HEADERP first. */
24813 static const struct comp_unit_head
*
24814 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24815 struct dwarf2_per_cu_data
*per_cu
)
24817 const gdb_byte
*info_ptr
;
24820 return &per_cu
->cu
->header
;
24822 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24824 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24825 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24826 rcuh_kind::COMPILE
);
24831 /* Return the address size given in the compilation unit header for CU. */
24834 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24836 struct comp_unit_head cu_header_local
;
24837 const struct comp_unit_head
*cu_headerp
;
24839 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24841 return cu_headerp
->addr_size
;
24844 /* Return the offset size given in the compilation unit header for CU. */
24847 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24849 struct comp_unit_head cu_header_local
;
24850 const struct comp_unit_head
*cu_headerp
;
24852 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24854 return cu_headerp
->offset_size
;
24857 /* See its dwarf2loc.h declaration. */
24860 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24862 struct comp_unit_head cu_header_local
;
24863 const struct comp_unit_head
*cu_headerp
;
24865 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24867 if (cu_headerp
->version
== 2)
24868 return cu_headerp
->addr_size
;
24870 return cu_headerp
->offset_size
;
24873 /* Return the text offset of the CU. The returned offset comes from
24874 this CU's objfile. If this objfile came from a separate debuginfo
24875 file, then the offset may be different from the corresponding
24876 offset in the parent objfile. */
24879 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24881 return per_cu
->dwarf2_per_objfile
->objfile
->text_section_offset ();
24884 /* Return a type that is a generic pointer type, the size of which matches
24885 the address size given in the compilation unit header for PER_CU. */
24886 static struct type
*
24887 dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
)
24889 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24890 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
24891 struct type
*addr_type
= lookup_pointer_type (void_type
);
24892 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
24894 if (TYPE_LENGTH (addr_type
) == addr_size
)
24898 = dwarf2_per_cu_addr_sized_int_type (per_cu
, TYPE_UNSIGNED (addr_type
));
24902 /* Return DWARF version number of PER_CU. */
24905 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24907 return per_cu
->dwarf_version
;
24910 /* Locate the .debug_info compilation unit from CU's objfile which contains
24911 the DIE at OFFSET. Raises an error on failure. */
24913 static struct dwarf2_per_cu_data
*
24914 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24915 unsigned int offset_in_dwz
,
24916 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24918 struct dwarf2_per_cu_data
*this_cu
;
24922 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24925 struct dwarf2_per_cu_data
*mid_cu
;
24926 int mid
= low
+ (high
- low
) / 2;
24928 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24929 if (mid_cu
->is_dwz
> offset_in_dwz
24930 || (mid_cu
->is_dwz
== offset_in_dwz
24931 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
24936 gdb_assert (low
== high
);
24937 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24938 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
24940 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24941 error (_("Dwarf Error: could not find partial DIE containing "
24942 "offset %s [in module %s]"),
24943 sect_offset_str (sect_off
),
24944 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24946 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24948 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24952 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
24953 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24954 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24955 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24960 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24962 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24963 : per_cu (per_cu_
),
24965 has_loclist (false),
24966 checked_producer (false),
24967 producer_is_gxx_lt_4_6 (false),
24968 producer_is_gcc_lt_4_3 (false),
24969 producer_is_icc (false),
24970 producer_is_icc_lt_14 (false),
24971 producer_is_codewarrior (false),
24972 processing_has_namespace_info (false)
24977 /* Destroy a dwarf2_cu. */
24979 dwarf2_cu::~dwarf2_cu ()
24984 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24987 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24988 enum language pretend_language
)
24990 struct attribute
*attr
;
24992 /* Set the language we're debugging. */
24993 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24994 if (attr
!= nullptr)
24995 set_cu_language (DW_UNSND (attr
), cu
);
24998 cu
->language
= pretend_language
;
24999 cu
->language_defn
= language_def (cu
->language
);
25002 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25005 /* Increase the age counter on each cached compilation unit, and free
25006 any that are too old. */
25009 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25011 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25013 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25014 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25015 while (per_cu
!= NULL
)
25017 per_cu
->cu
->last_used
++;
25018 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25019 dwarf2_mark (per_cu
->cu
);
25020 per_cu
= per_cu
->cu
->read_in_chain
;
25023 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25024 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25025 while (per_cu
!= NULL
)
25027 struct dwarf2_per_cu_data
*next_cu
;
25029 next_cu
= per_cu
->cu
->read_in_chain
;
25031 if (!per_cu
->cu
->mark
)
25034 *last_chain
= next_cu
;
25037 last_chain
= &per_cu
->cu
->read_in_chain
;
25043 /* Remove a single compilation unit from the cache. */
25046 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25048 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25049 struct dwarf2_per_objfile
*dwarf2_per_objfile
25050 = target_per_cu
->dwarf2_per_objfile
;
25052 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25053 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25054 while (per_cu
!= NULL
)
25056 struct dwarf2_per_cu_data
*next_cu
;
25058 next_cu
= per_cu
->cu
->read_in_chain
;
25060 if (per_cu
== target_per_cu
)
25064 *last_chain
= next_cu
;
25068 last_chain
= &per_cu
->cu
->read_in_chain
;
25074 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25075 We store these in a hash table separate from the DIEs, and preserve them
25076 when the DIEs are flushed out of cache.
25078 The CU "per_cu" pointer is needed because offset alone is not enough to
25079 uniquely identify the type. A file may have multiple .debug_types sections,
25080 or the type may come from a DWO file. Furthermore, while it's more logical
25081 to use per_cu->section+offset, with Fission the section with the data is in
25082 the DWO file but we don't know that section at the point we need it.
25083 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25084 because we can enter the lookup routine, get_die_type_at_offset, from
25085 outside this file, and thus won't necessarily have PER_CU->cu.
25086 Fortunately, PER_CU is stable for the life of the objfile. */
25088 struct dwarf2_per_cu_offset_and_type
25090 const struct dwarf2_per_cu_data
*per_cu
;
25091 sect_offset sect_off
;
25095 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25098 per_cu_offset_and_type_hash (const void *item
)
25100 const struct dwarf2_per_cu_offset_and_type
*ofs
25101 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25103 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25106 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25109 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25111 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25112 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25113 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25114 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25116 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25117 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25120 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25121 table if necessary. For convenience, return TYPE.
25123 The DIEs reading must have careful ordering to:
25124 * Not cause infinite loops trying to read in DIEs as a prerequisite for
25125 reading current DIE.
25126 * Not trying to dereference contents of still incompletely read in types
25127 while reading in other DIEs.
25128 * Enable referencing still incompletely read in types just by a pointer to
25129 the type without accessing its fields.
25131 Therefore caller should follow these rules:
25132 * Try to fetch any prerequisite types we may need to build this DIE type
25133 before building the type and calling set_die_type.
25134 * After building type call set_die_type for current DIE as soon as
25135 possible before fetching more types to complete the current type.
25136 * Make the type as complete as possible before fetching more types. */
25138 static struct type
*
25139 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25141 struct dwarf2_per_objfile
*dwarf2_per_objfile
25142 = cu
->per_cu
->dwarf2_per_objfile
;
25143 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25144 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25145 struct attribute
*attr
;
25146 struct dynamic_prop prop
;
25148 /* For Ada types, make sure that the gnat-specific data is always
25149 initialized (if not already set). There are a few types where
25150 we should not be doing so, because the type-specific area is
25151 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25152 where the type-specific area is used to store the floatformat).
25153 But this is not a problem, because the gnat-specific information
25154 is actually not needed for these types. */
25155 if (need_gnat_info (cu
)
25156 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25157 && TYPE_CODE (type
) != TYPE_CODE_FLT
25158 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25159 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25160 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25161 && !HAVE_GNAT_AUX_INFO (type
))
25162 INIT_GNAT_SPECIFIC (type
);
25164 /* Read DW_AT_allocated and set in type. */
25165 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25166 if (attr
!= NULL
&& attr
->form_is_block ())
25168 struct type
*prop_type
25169 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25170 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25171 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25173 else if (attr
!= NULL
)
25175 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25176 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25177 sect_offset_str (die
->sect_off
));
25180 /* Read DW_AT_associated and set in type. */
25181 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25182 if (attr
!= NULL
&& attr
->form_is_block ())
25184 struct type
*prop_type
25185 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25186 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25187 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25189 else if (attr
!= NULL
)
25191 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25192 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25193 sect_offset_str (die
->sect_off
));
25196 /* Read DW_AT_data_location and set in type. */
25197 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25198 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
25199 dwarf2_per_cu_addr_type (cu
->per_cu
)))
25200 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25202 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25204 dwarf2_per_objfile
->die_type_hash
=
25205 htab_create_alloc_ex (127,
25206 per_cu_offset_and_type_hash
,
25207 per_cu_offset_and_type_eq
,
25209 &objfile
->objfile_obstack
,
25210 hashtab_obstack_allocate
,
25211 dummy_obstack_deallocate
);
25214 ofs
.per_cu
= cu
->per_cu
;
25215 ofs
.sect_off
= die
->sect_off
;
25217 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25218 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25220 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25221 sect_offset_str (die
->sect_off
));
25222 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25223 struct dwarf2_per_cu_offset_and_type
);
25228 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25229 or return NULL if the die does not have a saved type. */
25231 static struct type
*
25232 get_die_type_at_offset (sect_offset sect_off
,
25233 struct dwarf2_per_cu_data
*per_cu
)
25235 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25236 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25238 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25241 ofs
.per_cu
= per_cu
;
25242 ofs
.sect_off
= sect_off
;
25243 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25244 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25251 /* Look up the type for DIE in CU in die_type_hash,
25252 or return NULL if DIE does not have a saved type. */
25254 static struct type
*
25255 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25257 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25260 /* Add a dependence relationship from CU to REF_PER_CU. */
25263 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25264 struct dwarf2_per_cu_data
*ref_per_cu
)
25268 if (cu
->dependencies
== NULL
)
25270 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25271 NULL
, &cu
->comp_unit_obstack
,
25272 hashtab_obstack_allocate
,
25273 dummy_obstack_deallocate
);
25275 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25277 *slot
= ref_per_cu
;
25280 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25281 Set the mark field in every compilation unit in the
25282 cache that we must keep because we are keeping CU. */
25285 dwarf2_mark_helper (void **slot
, void *data
)
25287 struct dwarf2_per_cu_data
*per_cu
;
25289 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25291 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25292 reading of the chain. As such dependencies remain valid it is not much
25293 useful to track and undo them during QUIT cleanups. */
25294 if (per_cu
->cu
== NULL
)
25297 if (per_cu
->cu
->mark
)
25299 per_cu
->cu
->mark
= true;
25301 if (per_cu
->cu
->dependencies
!= NULL
)
25302 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25307 /* Set the mark field in CU and in every other compilation unit in the
25308 cache that we must keep because we are keeping CU. */
25311 dwarf2_mark (struct dwarf2_cu
*cu
)
25316 if (cu
->dependencies
!= NULL
)
25317 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25321 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25325 per_cu
->cu
->mark
= false;
25326 per_cu
= per_cu
->cu
->read_in_chain
;
25330 /* Trivial hash function for partial_die_info: the hash value of a DIE
25331 is its offset in .debug_info for this objfile. */
25334 partial_die_hash (const void *item
)
25336 const struct partial_die_info
*part_die
25337 = (const struct partial_die_info
*) item
;
25339 return to_underlying (part_die
->sect_off
);
25342 /* Trivial comparison function for partial_die_info structures: two DIEs
25343 are equal if they have the same offset. */
25346 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25348 const struct partial_die_info
*part_die_lhs
25349 = (const struct partial_die_info
*) item_lhs
;
25350 const struct partial_die_info
*part_die_rhs
25351 = (const struct partial_die_info
*) item_rhs
;
25353 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25356 struct cmd_list_element
*set_dwarf_cmdlist
;
25357 struct cmd_list_element
*show_dwarf_cmdlist
;
25360 set_dwarf_cmd (const char *args
, int from_tty
)
25362 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25367 show_dwarf_cmd (const char *args
, int from_tty
)
25369 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25372 bool dwarf_always_disassemble
;
25375 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25376 struct cmd_list_element
*c
, const char *value
)
25378 fprintf_filtered (file
,
25379 _("Whether to always disassemble "
25380 "DWARF expressions is %s.\n"),
25385 show_check_physname (struct ui_file
*file
, int from_tty
,
25386 struct cmd_list_element
*c
, const char *value
)
25388 fprintf_filtered (file
,
25389 _("Whether to check \"physname\" is %s.\n"),
25393 void _initialize_dwarf2_read ();
25395 _initialize_dwarf2_read ()
25397 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25398 Set DWARF specific variables.\n\
25399 Configure DWARF variables such as the cache size."),
25400 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25401 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25403 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25404 Show DWARF specific variables.\n\
25405 Show DWARF variables such as the cache size."),
25406 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25407 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25409 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25410 &dwarf_max_cache_age
, _("\
25411 Set the upper bound on the age of cached DWARF compilation units."), _("\
25412 Show the upper bound on the age of cached DWARF compilation units."), _("\
25413 A higher limit means that cached compilation units will be stored\n\
25414 in memory longer, and more total memory will be used. Zero disables\n\
25415 caching, which can slow down startup."),
25417 show_dwarf_max_cache_age
,
25418 &set_dwarf_cmdlist
,
25419 &show_dwarf_cmdlist
);
25421 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25422 &dwarf_always_disassemble
, _("\
25423 Set whether `info address' always disassembles DWARF expressions."), _("\
25424 Show whether `info address' always disassembles DWARF expressions."), _("\
25425 When enabled, DWARF expressions are always printed in an assembly-like\n\
25426 syntax. When disabled, expressions will be printed in a more\n\
25427 conversational style, when possible."),
25429 show_dwarf_always_disassemble
,
25430 &set_dwarf_cmdlist
,
25431 &show_dwarf_cmdlist
);
25433 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25434 Set debugging of the DWARF reader."), _("\
25435 Show debugging of the DWARF reader."), _("\
25436 When enabled (non-zero), debugging messages are printed during DWARF\n\
25437 reading and symtab expansion. A value of 1 (one) provides basic\n\
25438 information. A value greater than 1 provides more verbose information."),
25441 &setdebuglist
, &showdebuglist
);
25443 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25444 Set debugging of the DWARF DIE reader."), _("\
25445 Show debugging of the DWARF DIE reader."), _("\
25446 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25447 The value is the maximum depth to print."),
25450 &setdebuglist
, &showdebuglist
);
25452 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25453 Set debugging of the dwarf line reader."), _("\
25454 Show debugging of the dwarf line reader."), _("\
25455 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25456 A value of 1 (one) provides basic information.\n\
25457 A value greater than 1 provides more verbose information."),
25460 &setdebuglist
, &showdebuglist
);
25462 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25463 Set cross-checking of \"physname\" code against demangler."), _("\
25464 Show cross-checking of \"physname\" code against demangler."), _("\
25465 When enabled, GDB's internal \"physname\" code is checked against\n\
25467 NULL
, show_check_physname
,
25468 &setdebuglist
, &showdebuglist
);
25470 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25471 no_class
, &use_deprecated_index_sections
, _("\
25472 Set whether to use deprecated gdb_index sections."), _("\
25473 Show whether to use deprecated gdb_index sections."), _("\
25474 When enabled, deprecated .gdb_index sections are used anyway.\n\
25475 Normally they are ignored either because of a missing feature or\n\
25476 performance issue.\n\
25477 Warning: This option must be enabled before gdb reads the file."),
25480 &setlist
, &showlist
);
25482 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25483 &dwarf2_locexpr_funcs
);
25484 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25485 &dwarf2_loclist_funcs
);
25487 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25488 &dwarf2_block_frame_base_locexpr_funcs
);
25489 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25490 &dwarf2_block_frame_base_loclist_funcs
);
25493 selftests::register_test ("dw2_expand_symtabs_matching",
25494 selftests::dw2_expand_symtabs_matching::run_test
);