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/comp-unit.h"
36 #include "dwarf2/index-cache.h"
37 #include "dwarf2/index-common.h"
38 #include "dwarf2/leb.h"
39 #include "dwarf2/line-header.h"
40 #include "dwarf2/dwz.h"
41 #include "dwarf2/macro.h"
42 #include "dwarf2/die.h"
43 #include "dwarf2/stringify.h"
52 #include "gdb-demangle.h"
53 #include "filenames.h" /* for DOSish file names */
55 #include "complaints.h"
56 #include "dwarf2/expr.h"
57 #include "dwarf2/loc.h"
58 #include "cp-support.h"
64 #include "typeprint.h"
69 #include "gdbcore.h" /* for gnutarget */
70 #include "gdb/gdb-index.h"
75 #include "namespace.h"
76 #include "gdbsupport/function-view.h"
77 #include "gdbsupport/gdb_optional.h"
78 #include "gdbsupport/underlying.h"
79 #include "gdbsupport/hash_enum.h"
80 #include "filename-seen-cache.h"
84 #include <unordered_map>
85 #include "gdbsupport/selftest.h"
86 #include "rust-lang.h"
87 #include "gdbsupport/pathstuff.h"
88 #include "count-one-bits.h"
89 #include "debuginfod-support.h"
91 /* When == 1, print basic high level tracing messages.
92 When > 1, be more verbose.
93 This is in contrast to the low level DIE reading of dwarf_die_debug. */
94 static unsigned int dwarf_read_debug
= 0;
96 /* When non-zero, dump DIEs after they are read in. */
97 static unsigned int dwarf_die_debug
= 0;
99 /* When non-zero, dump line number entries as they are read in. */
100 unsigned int dwarf_line_debug
= 0;
102 /* When true, cross-check physname against demangler. */
103 static bool check_physname
= false;
105 /* When true, do not reject deprecated .gdb_index sections. */
106 static bool use_deprecated_index_sections
= false;
108 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
110 /* The "aclass" indices for various kinds of computed DWARF symbols. */
112 static int dwarf2_locexpr_index
;
113 static int dwarf2_loclist_index
;
114 static int dwarf2_locexpr_block_index
;
115 static int dwarf2_loclist_block_index
;
117 /* Size of .debug_loclists section header for 32-bit DWARF format. */
118 #define LOCLIST_HEADER_SIZE32 12
120 /* Size of .debug_loclists section header for 64-bit DWARF format. */
121 #define LOCLIST_HEADER_SIZE64 20
123 /* An index into a (C++) symbol name component in a symbol name as
124 recorded in the mapped_index's symbol table. For each C++ symbol
125 in the symbol table, we record one entry for the start of each
126 component in the symbol in a table of name components, and then
127 sort the table, in order to be able to binary search symbol names,
128 ignoring leading namespaces, both completion and regular look up.
129 For example, for symbol "A::B::C", we'll have an entry that points
130 to "A::B::C", another that points to "B::C", and another for "C".
131 Note that function symbols in GDB index have no parameter
132 information, just the function/method names. You can convert a
133 name_component to a "const char *" using the
134 'mapped_index::symbol_name_at(offset_type)' method. */
136 struct name_component
138 /* Offset in the symbol name where the component starts. Stored as
139 a (32-bit) offset instead of a pointer to save memory and improve
140 locality on 64-bit architectures. */
141 offset_type name_offset
;
143 /* The symbol's index in the symbol and constant pool tables of a
148 /* Base class containing bits shared by both .gdb_index and
149 .debug_name indexes. */
151 struct mapped_index_base
153 mapped_index_base () = default;
154 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
156 /* The name_component table (a sorted vector). See name_component's
157 description above. */
158 std::vector
<name_component
> name_components
;
160 /* How NAME_COMPONENTS is sorted. */
161 enum case_sensitivity name_components_casing
;
163 /* Return the number of names in the symbol table. */
164 virtual size_t symbol_name_count () const = 0;
166 /* Get the name of the symbol at IDX in the symbol table. */
167 virtual const char *symbol_name_at (offset_type idx
) const = 0;
169 /* Return whether the name at IDX in the symbol table should be
171 virtual bool symbol_name_slot_invalid (offset_type idx
) const
176 /* Build the symbol name component sorted vector, if we haven't
178 void build_name_components ();
180 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
181 possible matches for LN_NO_PARAMS in the name component
183 std::pair
<std::vector
<name_component
>::const_iterator
,
184 std::vector
<name_component
>::const_iterator
>
185 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
186 enum language lang
) const;
188 /* Prevent deleting/destroying via a base class pointer. */
190 ~mapped_index_base() = default;
193 /* A description of the mapped index. The file format is described in
194 a comment by the code that writes the index. */
195 struct mapped_index final
: public mapped_index_base
197 /* A slot/bucket in the symbol table hash. */
198 struct symbol_table_slot
200 const offset_type name
;
201 const offset_type vec
;
204 /* Index data format version. */
207 /* The address table data. */
208 gdb::array_view
<const gdb_byte
> address_table
;
210 /* The symbol table, implemented as a hash table. */
211 gdb::array_view
<symbol_table_slot
> symbol_table
;
213 /* A pointer to the constant pool. */
214 const char *constant_pool
= nullptr;
216 bool symbol_name_slot_invalid (offset_type idx
) const override
218 const auto &bucket
= this->symbol_table
[idx
];
219 return bucket
.name
== 0 && bucket
.vec
== 0;
222 /* Convenience method to get at the name of the symbol at IDX in the
224 const char *symbol_name_at (offset_type idx
) const override
225 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
227 size_t symbol_name_count () const override
228 { return this->symbol_table
.size (); }
231 /* A description of the mapped .debug_names.
232 Uninitialized map has CU_COUNT 0. */
233 struct mapped_debug_names final
: public mapped_index_base
235 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
236 : dwarf2_per_objfile (dwarf2_per_objfile_
)
239 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
240 bfd_endian dwarf5_byte_order
;
241 bool dwarf5_is_dwarf64
;
242 bool augmentation_is_gdb
;
244 uint32_t cu_count
= 0;
245 uint32_t tu_count
, bucket_count
, name_count
;
246 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
247 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
248 const gdb_byte
*name_table_string_offs_reordered
;
249 const gdb_byte
*name_table_entry_offs_reordered
;
250 const gdb_byte
*entry_pool
;
257 /* Attribute name DW_IDX_*. */
260 /* Attribute form DW_FORM_*. */
263 /* Value if FORM is DW_FORM_implicit_const. */
264 LONGEST implicit_const
;
266 std::vector
<attr
> attr_vec
;
269 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
271 const char *namei_to_name (uint32_t namei
) const;
273 /* Implementation of the mapped_index_base virtual interface, for
274 the name_components cache. */
276 const char *symbol_name_at (offset_type idx
) const override
277 { return namei_to_name (idx
); }
279 size_t symbol_name_count () const override
280 { return this->name_count
; }
283 /* See dwarf2read.h. */
286 get_dwarf2_per_objfile (struct objfile
*objfile
)
288 return dwarf2_objfile_data_key
.get (objfile
);
291 /* Default names of the debugging sections. */
293 /* Note that if the debugging section has been compressed, it might
294 have a name like .zdebug_info. */
296 static const struct dwarf2_debug_sections dwarf2_elf_names
=
298 { ".debug_info", ".zdebug_info" },
299 { ".debug_abbrev", ".zdebug_abbrev" },
300 { ".debug_line", ".zdebug_line" },
301 { ".debug_loc", ".zdebug_loc" },
302 { ".debug_loclists", ".zdebug_loclists" },
303 { ".debug_macinfo", ".zdebug_macinfo" },
304 { ".debug_macro", ".zdebug_macro" },
305 { ".debug_str", ".zdebug_str" },
306 { ".debug_str_offsets", ".zdebug_str_offsets" },
307 { ".debug_line_str", ".zdebug_line_str" },
308 { ".debug_ranges", ".zdebug_ranges" },
309 { ".debug_rnglists", ".zdebug_rnglists" },
310 { ".debug_types", ".zdebug_types" },
311 { ".debug_addr", ".zdebug_addr" },
312 { ".debug_frame", ".zdebug_frame" },
313 { ".eh_frame", NULL
},
314 { ".gdb_index", ".zgdb_index" },
315 { ".debug_names", ".zdebug_names" },
316 { ".debug_aranges", ".zdebug_aranges" },
320 /* List of DWO/DWP sections. */
322 static const struct dwop_section_names
324 struct dwarf2_section_names abbrev_dwo
;
325 struct dwarf2_section_names info_dwo
;
326 struct dwarf2_section_names line_dwo
;
327 struct dwarf2_section_names loc_dwo
;
328 struct dwarf2_section_names loclists_dwo
;
329 struct dwarf2_section_names macinfo_dwo
;
330 struct dwarf2_section_names macro_dwo
;
331 struct dwarf2_section_names str_dwo
;
332 struct dwarf2_section_names str_offsets_dwo
;
333 struct dwarf2_section_names types_dwo
;
334 struct dwarf2_section_names cu_index
;
335 struct dwarf2_section_names tu_index
;
339 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
340 { ".debug_info.dwo", ".zdebug_info.dwo" },
341 { ".debug_line.dwo", ".zdebug_line.dwo" },
342 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
343 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
344 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
345 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
346 { ".debug_str.dwo", ".zdebug_str.dwo" },
347 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
348 { ".debug_types.dwo", ".zdebug_types.dwo" },
349 { ".debug_cu_index", ".zdebug_cu_index" },
350 { ".debug_tu_index", ".zdebug_tu_index" },
353 /* local data types */
355 /* The location list section (.debug_loclists) begins with a header,
356 which contains the following information. */
357 struct loclist_header
359 /* A 4-byte or 12-byte length containing the length of the
360 set of entries for this compilation unit, not including the
361 length field itself. */
364 /* A 2-byte version identifier. */
367 /* A 1-byte unsigned integer containing the size in bytes of an address on
368 the target system. */
369 unsigned char addr_size
;
371 /* A 1-byte unsigned integer containing the size in bytes of a segment selector
372 on the target system. */
373 unsigned char segment_collector_size
;
375 /* A 4-byte count of the number of offsets that follow the header. */
376 unsigned int offset_entry_count
;
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 (dwarf2_per_cu_data
*per_cu
,
403 dwarf2_per_objfile
*per_objfile
);
406 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
408 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
409 Create the set of symtabs used by this TU, or if this TU is sharing
410 symtabs with another TU and the symtabs have already been created
411 then restore those symtabs in the line header.
412 We don't need the pc/line-number mapping for type units. */
413 void setup_type_unit_groups (struct die_info
*die
);
415 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
416 buildsym_compunit constructor. */
417 struct compunit_symtab
*start_symtab (const char *name
,
418 const char *comp_dir
,
421 /* Reset the builder. */
422 void reset_builder () { m_builder
.reset (); }
424 /* Return a type that is a generic pointer type, the size of which
425 matches the address size given in the compilation unit header for
427 struct type
*addr_type () const;
429 /* Find an integer type the same size as the address size given in
430 the compilation unit header for this CU. UNSIGNED_P controls if
431 the integer is unsigned or not. */
432 struct type
*addr_sized_int_type (bool unsigned_p
) const;
434 /* The header of the compilation unit. */
435 struct comp_unit_head header
{};
437 /* Base address of this compilation unit. */
438 gdb::optional
<CORE_ADDR
> base_address
;
440 /* The language we are debugging. */
441 enum language language
= language_unknown
;
442 const struct language_defn
*language_defn
= nullptr;
444 const char *producer
= nullptr;
447 /* The symtab builder for this CU. This is only non-NULL when full
448 symbols are being read. */
449 std::unique_ptr
<buildsym_compunit
> m_builder
;
452 /* The generic symbol table building routines have separate lists for
453 file scope symbols and all all other scopes (local scopes). So
454 we need to select the right one to pass to add_symbol_to_list().
455 We do it by keeping a pointer to the correct list in list_in_scope.
457 FIXME: The original dwarf code just treated the file scope as the
458 first local scope, and all other local scopes as nested local
459 scopes, and worked fine. Check to see if we really need to
460 distinguish these in buildsym.c. */
461 struct pending
**list_in_scope
= nullptr;
463 /* Hash table holding all the loaded partial DIEs
464 with partial_die->offset.SECT_OFF as hash. */
465 htab_t partial_dies
= nullptr;
467 /* Storage for things with the same lifetime as this read-in compilation
468 unit, including partial DIEs. */
469 auto_obstack comp_unit_obstack
;
471 /* When multiple dwarf2_cu structures are living in memory, this field
472 chains them all together, so that they can be released efficiently.
473 We will probably also want a generation counter so that most-recently-used
474 compilation units are cached... */
475 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
477 /* Backlink to our per_cu entry. */
478 struct dwarf2_per_cu_data
*per_cu
;
480 /* The dwarf2_per_objfile that owns this. */
481 struct dwarf2_per_objfile
*per_objfile
;
483 /* How many compilation units ago was this CU last referenced? */
486 /* A hash table of DIE cu_offset for following references with
487 die_info->offset.sect_off as hash. */
488 htab_t die_hash
= nullptr;
490 /* Full DIEs if read in. */
491 struct die_info
*dies
= nullptr;
493 /* A set of pointers to dwarf2_per_cu_data objects for compilation
494 units referenced by this one. Only set during full symbol processing;
495 partial symbol tables do not have dependencies. */
496 htab_t dependencies
= nullptr;
498 /* Header data from the line table, during full symbol processing. */
499 struct line_header
*line_header
= nullptr;
500 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
501 it's owned by dwarf2_per_bfd::line_header_hash. If non-NULL,
502 this is the DW_TAG_compile_unit die for this CU. We'll hold on
503 to the line header as long as this DIE is being processed. See
504 process_die_scope. */
505 die_info
*line_header_die_owner
= nullptr;
507 /* A list of methods which need to have physnames computed
508 after all type information has been read. */
509 std::vector
<delayed_method_info
> method_list
;
511 /* To be copied to symtab->call_site_htab. */
512 htab_t call_site_htab
= nullptr;
514 /* Non-NULL if this CU came from a DWO file.
515 There is an invariant here that is important to remember:
516 Except for attributes copied from the top level DIE in the "main"
517 (or "stub") file in preparation for reading the DWO file
518 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
519 Either there isn't a DWO file (in which case this is NULL and the point
520 is moot), or there is and either we're not going to read it (in which
521 case this is NULL) or there is and we are reading it (in which case this
523 struct dwo_unit
*dwo_unit
= nullptr;
525 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
526 Note this value comes from the Fission stub CU/TU's DIE. */
527 gdb::optional
<ULONGEST
> addr_base
;
529 /* The DW_AT_rnglists_base attribute if present.
530 Note this value comes from the Fission stub CU/TU's DIE.
531 Also note that the value is zero in the non-DWO case so this value can
532 be used without needing to know whether DWO files are in use or not.
533 N.B. This does not apply to DW_AT_ranges appearing in
534 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
535 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
536 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
537 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
538 ULONGEST ranges_base
= 0;
540 /* The DW_AT_loclists_base attribute if present. */
541 ULONGEST loclist_base
= 0;
543 /* When reading debug info generated by older versions of rustc, we
544 have to rewrite some union types to be struct types with a
545 variant part. This rewriting must be done after the CU is fully
546 read in, because otherwise at the point of rewriting some struct
547 type might not have been fully processed. So, we keep a list of
548 all such types here and process them after expansion. */
549 std::vector
<struct type
*> rust_unions
;
551 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
552 files, the value is implicitly zero. For DWARF 5 version DWO files, the
553 value is often implicit and is the size of the header of
554 .debug_str_offsets section (8 or 4, depending on the address size). */
555 gdb::optional
<ULONGEST
> str_offsets_base
;
557 /* Mark used when releasing cached dies. */
560 /* This CU references .debug_loc. See the symtab->locations_valid field.
561 This test is imperfect as there may exist optimized debug code not using
562 any location list and still facing inlining issues if handled as
563 unoptimized code. For a future better test see GCC PR other/32998. */
564 bool has_loclist
: 1;
566 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
567 if all the producer_is_* fields are valid. This information is cached
568 because profiling CU expansion showed excessive time spent in
569 producer_is_gxx_lt_4_6. */
570 bool checked_producer
: 1;
571 bool producer_is_gxx_lt_4_6
: 1;
572 bool producer_is_gcc_lt_4_3
: 1;
573 bool producer_is_icc
: 1;
574 bool producer_is_icc_lt_14
: 1;
575 bool producer_is_codewarrior
: 1;
577 /* When true, the file that we're processing is known to have
578 debugging info for C++ namespaces. GCC 3.3.x did not produce
579 this information, but later versions do. */
581 bool processing_has_namespace_info
: 1;
583 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
585 /* If this CU was inherited by another CU (via specification,
586 abstract_origin, etc), this is the ancestor CU. */
589 /* Get the buildsym_compunit for this CU. */
590 buildsym_compunit
*get_builder ()
592 /* If this CU has a builder associated with it, use that. */
593 if (m_builder
!= nullptr)
594 return m_builder
.get ();
596 /* Otherwise, search ancestors for a valid builder. */
597 if (ancestor
!= nullptr)
598 return ancestor
->get_builder ();
604 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
605 This includes type_unit_group and quick_file_names. */
607 struct stmt_list_hash
609 /* The DWO unit this table is from or NULL if there is none. */
610 struct dwo_unit
*dwo_unit
;
612 /* Offset in .debug_line or .debug_line.dwo. */
613 sect_offset line_sect_off
;
616 /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to
617 an object of this type. This contains elements of type unit groups
618 that can be shared across objfiles. The non-shareable parts are in
619 type_unit_group_unshareable. */
621 struct type_unit_group
623 /* dwarf2read.c's main "handle" on a TU symtab.
624 To simplify things we create an artificial CU that "includes" all the
625 type units using this stmt_list so that the rest of the code still has
626 a "per_cu" handle on the symtab. */
627 struct dwarf2_per_cu_data per_cu
;
629 /* The TUs that share this DW_AT_stmt_list entry.
630 This is added to while parsing type units to build partial symtabs,
631 and is deleted afterwards and not used again. */
632 std::vector
<signatured_type
*> *tus
;
634 /* The data used to construct the hash key. */
635 struct stmt_list_hash hash
;
638 /* These sections are what may appear in a (real or virtual) DWO file. */
642 struct dwarf2_section_info abbrev
;
643 struct dwarf2_section_info line
;
644 struct dwarf2_section_info loc
;
645 struct dwarf2_section_info loclists
;
646 struct dwarf2_section_info macinfo
;
647 struct dwarf2_section_info macro
;
648 struct dwarf2_section_info str
;
649 struct dwarf2_section_info str_offsets
;
650 /* In the case of a virtual DWO file, these two are unused. */
651 struct dwarf2_section_info info
;
652 std::vector
<dwarf2_section_info
> types
;
655 /* CUs/TUs in DWP/DWO files. */
659 /* Backlink to the containing struct dwo_file. */
660 struct dwo_file
*dwo_file
;
662 /* The "id" that distinguishes this CU/TU.
663 .debug_info calls this "dwo_id", .debug_types calls this "signature".
664 Since signatures came first, we stick with it for consistency. */
667 /* The section this CU/TU lives in, in the DWO file. */
668 struct dwarf2_section_info
*section
;
670 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
671 sect_offset sect_off
;
674 /* For types, offset in the type's DIE of the type defined by this TU. */
675 cu_offset type_offset_in_tu
;
678 /* include/dwarf2.h defines the DWP section codes.
679 It defines a max value but it doesn't define a min value, which we
680 use for error checking, so provide one. */
682 enum dwp_v2_section_ids
687 /* Data for one DWO file.
689 This includes virtual DWO files (a virtual DWO file is a DWO file as it
690 appears in a DWP file). DWP files don't really have DWO files per se -
691 comdat folding of types "loses" the DWO file they came from, and from
692 a high level view DWP files appear to contain a mass of random types.
693 However, to maintain consistency with the non-DWP case we pretend DWP
694 files contain virtual DWO files, and we assign each TU with one virtual
695 DWO file (generally based on the line and abbrev section offsets -
696 a heuristic that seems to work in practice). */
700 dwo_file () = default;
701 DISABLE_COPY_AND_ASSIGN (dwo_file
);
703 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
704 For virtual DWO files the name is constructed from the section offsets
705 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
706 from related CU+TUs. */
707 const char *dwo_name
= nullptr;
709 /* The DW_AT_comp_dir attribute. */
710 const char *comp_dir
= nullptr;
712 /* The bfd, when the file is open. Otherwise this is NULL.
713 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
714 gdb_bfd_ref_ptr dbfd
;
716 /* The sections that make up this DWO file.
717 Remember that for virtual DWO files in DWP V2, these are virtual
718 sections (for lack of a better name). */
719 struct dwo_sections sections
{};
721 /* The CUs in the file.
722 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
723 an extension to handle LLVM's Link Time Optimization output (where
724 multiple source files may be compiled into a single object/dwo pair). */
727 /* Table of TUs in the file.
728 Each element is a struct dwo_unit. */
732 /* These sections are what may appear in a DWP file. */
736 /* These are used by both DWP version 1 and 2. */
737 struct dwarf2_section_info str
;
738 struct dwarf2_section_info cu_index
;
739 struct dwarf2_section_info tu_index
;
741 /* These are only used by DWP version 2 files.
742 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
743 sections are referenced by section number, and are not recorded here.
744 In DWP version 2 there is at most one copy of all these sections, each
745 section being (effectively) comprised of the concatenation of all of the
746 individual sections that exist in the version 1 format.
747 To keep the code simple we treat each of these concatenated pieces as a
748 section itself (a virtual section?). */
749 struct dwarf2_section_info abbrev
;
750 struct dwarf2_section_info info
;
751 struct dwarf2_section_info line
;
752 struct dwarf2_section_info loc
;
753 struct dwarf2_section_info macinfo
;
754 struct dwarf2_section_info macro
;
755 struct dwarf2_section_info str_offsets
;
756 struct dwarf2_section_info types
;
759 /* These sections are what may appear in a virtual DWO file in DWP version 1.
760 A virtual DWO file is a DWO file as it appears in a DWP file. */
762 struct virtual_v1_dwo_sections
764 struct dwarf2_section_info abbrev
;
765 struct dwarf2_section_info line
;
766 struct dwarf2_section_info loc
;
767 struct dwarf2_section_info macinfo
;
768 struct dwarf2_section_info macro
;
769 struct dwarf2_section_info str_offsets
;
770 /* Each DWP hash table entry records one CU or one TU.
771 That is recorded here, and copied to dwo_unit.section. */
772 struct dwarf2_section_info info_or_types
;
775 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
776 In version 2, the sections of the DWO files are concatenated together
777 and stored in one section of that name. Thus each ELF section contains
778 several "virtual" sections. */
780 struct virtual_v2_dwo_sections
782 bfd_size_type abbrev_offset
;
783 bfd_size_type abbrev_size
;
785 bfd_size_type line_offset
;
786 bfd_size_type line_size
;
788 bfd_size_type loc_offset
;
789 bfd_size_type loc_size
;
791 bfd_size_type macinfo_offset
;
792 bfd_size_type macinfo_size
;
794 bfd_size_type macro_offset
;
795 bfd_size_type macro_size
;
797 bfd_size_type str_offsets_offset
;
798 bfd_size_type str_offsets_size
;
800 /* Each DWP hash table entry records one CU or one TU.
801 That is recorded here, and copied to dwo_unit.section. */
802 bfd_size_type info_or_types_offset
;
803 bfd_size_type info_or_types_size
;
806 /* Contents of DWP hash tables. */
808 struct dwp_hash_table
810 uint32_t version
, nr_columns
;
811 uint32_t nr_units
, nr_slots
;
812 const gdb_byte
*hash_table
, *unit_table
;
817 const gdb_byte
*indices
;
821 /* This is indexed by column number and gives the id of the section
823 #define MAX_NR_V2_DWO_SECTIONS \
824 (1 /* .debug_info or .debug_types */ \
825 + 1 /* .debug_abbrev */ \
826 + 1 /* .debug_line */ \
827 + 1 /* .debug_loc */ \
828 + 1 /* .debug_str_offsets */ \
829 + 1 /* .debug_macro or .debug_macinfo */)
830 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
831 const gdb_byte
*offsets
;
832 const gdb_byte
*sizes
;
837 /* Data for one DWP file. */
841 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
843 dbfd (std::move (abfd
))
847 /* Name of the file. */
850 /* File format version. */
854 gdb_bfd_ref_ptr dbfd
;
856 /* Section info for this file. */
857 struct dwp_sections sections
{};
859 /* Table of CUs in the file. */
860 const struct dwp_hash_table
*cus
= nullptr;
862 /* Table of TUs in the file. */
863 const struct dwp_hash_table
*tus
= nullptr;
865 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
869 /* Table to map ELF section numbers to their sections.
870 This is only needed for the DWP V1 file format. */
871 unsigned int num_sections
= 0;
872 asection
**elf_sections
= nullptr;
875 /* Struct used to pass misc. parameters to read_die_and_children, et
876 al. which are used for both .debug_info and .debug_types dies.
877 All parameters here are unchanging for the life of the call. This
878 struct exists to abstract away the constant parameters of die reading. */
880 struct die_reader_specs
882 /* The bfd of die_section. */
885 /* The CU of the DIE we are parsing. */
886 struct dwarf2_cu
*cu
;
888 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
889 struct dwo_file
*dwo_file
;
891 /* The section the die comes from.
892 This is either .debug_info or .debug_types, or the .dwo variants. */
893 struct dwarf2_section_info
*die_section
;
895 /* die_section->buffer. */
896 const gdb_byte
*buffer
;
898 /* The end of the buffer. */
899 const gdb_byte
*buffer_end
;
901 /* The abbreviation table to use when reading the DIEs. */
902 struct abbrev_table
*abbrev_table
;
905 /* A subclass of die_reader_specs that holds storage and has complex
906 constructor and destructor behavior. */
908 class cutu_reader
: public die_reader_specs
912 cutu_reader (dwarf2_per_cu_data
*this_cu
,
913 dwarf2_per_objfile
*per_objfile
,
914 struct abbrev_table
*abbrev_table
,
918 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
919 dwarf2_per_objfile
*per_objfile
,
920 struct dwarf2_cu
*parent_cu
= nullptr,
921 struct dwo_file
*dwo_file
= nullptr);
923 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
925 const gdb_byte
*info_ptr
= nullptr;
926 struct die_info
*comp_unit_die
= nullptr;
927 bool dummy_p
= false;
929 /* Release the new CU, putting it on the chain. This cannot be done
934 void init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
935 dwarf2_per_objfile
*per_objfile
,
936 int use_existing_cu
);
938 struct dwarf2_per_cu_data
*m_this_cu
;
939 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
941 /* The ordinary abbreviation table. */
942 abbrev_table_up m_abbrev_table_holder
;
944 /* The DWO abbreviation table. */
945 abbrev_table_up m_dwo_abbrev_table
;
948 /* When we construct a partial symbol table entry we only
949 need this much information. */
950 struct partial_die_info
: public allocate_on_obstack
952 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
954 /* Disable assign but still keep copy ctor, which is needed
955 load_partial_dies. */
956 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
958 /* Adjust the partial die before generating a symbol for it. This
959 function may set the is_external flag or change the DIE's
961 void fixup (struct dwarf2_cu
*cu
);
963 /* Read a minimal amount of information into the minimal die
965 const gdb_byte
*read (const struct die_reader_specs
*reader
,
966 const struct abbrev_info
&abbrev
,
967 const gdb_byte
*info_ptr
);
969 /* Offset of this DIE. */
970 const sect_offset sect_off
;
972 /* DWARF-2 tag for this DIE. */
973 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
975 /* Assorted flags describing the data found in this DIE. */
976 const unsigned int has_children
: 1;
978 unsigned int is_external
: 1;
979 unsigned int is_declaration
: 1;
980 unsigned int has_type
: 1;
981 unsigned int has_specification
: 1;
982 unsigned int has_pc_info
: 1;
983 unsigned int may_be_inlined
: 1;
985 /* This DIE has been marked DW_AT_main_subprogram. */
986 unsigned int main_subprogram
: 1;
988 /* Flag set if the SCOPE field of this structure has been
990 unsigned int scope_set
: 1;
992 /* Flag set if the DIE has a byte_size attribute. */
993 unsigned int has_byte_size
: 1;
995 /* Flag set if the DIE has a DW_AT_const_value attribute. */
996 unsigned int has_const_value
: 1;
998 /* Flag set if any of the DIE's children are template arguments. */
999 unsigned int has_template_arguments
: 1;
1001 /* Flag set if fixup has been called on this die. */
1002 unsigned int fixup_called
: 1;
1004 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1005 unsigned int is_dwz
: 1;
1007 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1008 unsigned int spec_is_dwz
: 1;
1010 /* The name of this DIE. Normally the value of DW_AT_name, but
1011 sometimes a default name for unnamed DIEs. */
1012 const char *name
= nullptr;
1014 /* The linkage name, if present. */
1015 const char *linkage_name
= nullptr;
1017 /* The scope to prepend to our children. This is generally
1018 allocated on the comp_unit_obstack, so will disappear
1019 when this compilation unit leaves the cache. */
1020 const char *scope
= nullptr;
1022 /* Some data associated with the partial DIE. The tag determines
1023 which field is live. */
1026 /* The location description associated with this DIE, if any. */
1027 struct dwarf_block
*locdesc
;
1028 /* The offset of an import, for DW_TAG_imported_unit. */
1029 sect_offset sect_off
;
1032 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1033 CORE_ADDR lowpc
= 0;
1034 CORE_ADDR highpc
= 0;
1036 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1037 DW_AT_sibling, if any. */
1038 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1039 could return DW_AT_sibling values to its caller load_partial_dies. */
1040 const gdb_byte
*sibling
= nullptr;
1042 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1043 DW_AT_specification (or DW_AT_abstract_origin or
1044 DW_AT_extension). */
1045 sect_offset spec_offset
{};
1047 /* Pointers to this DIE's parent, first child, and next sibling,
1049 struct partial_die_info
*die_parent
= nullptr;
1050 struct partial_die_info
*die_child
= nullptr;
1051 struct partial_die_info
*die_sibling
= nullptr;
1053 friend struct partial_die_info
*
1054 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1057 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1058 partial_die_info (sect_offset sect_off
)
1059 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1063 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1065 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1070 has_specification
= 0;
1073 main_subprogram
= 0;
1076 has_const_value
= 0;
1077 has_template_arguments
= 0;
1084 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1085 but this would require a corresponding change in unpack_field_as_long
1087 static int bits_per_byte
= 8;
1089 struct variant_part_builder
;
1091 /* When reading a variant, we track a bit more information about the
1092 field, and store it in an object of this type. */
1094 struct variant_field
1096 int first_field
= -1;
1097 int last_field
= -1;
1099 /* A variant can contain other variant parts. */
1100 std::vector
<variant_part_builder
> variant_parts
;
1102 /* If we see a DW_TAG_variant, then this will be set if this is the
1104 bool default_branch
= false;
1105 /* If we see a DW_AT_discr_value, then this will be the discriminant
1107 ULONGEST discriminant_value
= 0;
1108 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1110 struct dwarf_block
*discr_list_data
= nullptr;
1113 /* This represents a DW_TAG_variant_part. */
1115 struct variant_part_builder
1117 /* The offset of the discriminant field. */
1118 sect_offset discriminant_offset
{};
1120 /* Variants that are direct children of this variant part. */
1121 std::vector
<variant_field
> variants
;
1123 /* True if we're currently reading a variant. */
1124 bool processing_variant
= false;
1129 int accessibility
= 0;
1131 /* Variant parts need to find the discriminant, which is a DIE
1132 reference. We track the section offset of each field to make
1135 struct field field
{};
1140 const char *name
= nullptr;
1141 std::vector
<struct fn_field
> fnfields
;
1144 /* The routines that read and process dies for a C struct or C++ class
1145 pass lists of data member fields and lists of member function fields
1146 in an instance of a field_info structure, as defined below. */
1149 /* List of data member and baseclasses fields. */
1150 std::vector
<struct nextfield
> fields
;
1151 std::vector
<struct nextfield
> baseclasses
;
1153 /* Set if the accessibility of one of the fields is not public. */
1154 int non_public_fields
= 0;
1156 /* Member function fieldlist array, contains name of possibly overloaded
1157 member function, number of overloaded member functions and a pointer
1158 to the head of the member function field chain. */
1159 std::vector
<struct fnfieldlist
> fnfieldlists
;
1161 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1162 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1163 std::vector
<struct decl_field
> typedef_field_list
;
1165 /* Nested types defined by this class and the number of elements in this
1167 std::vector
<struct decl_field
> nested_types_list
;
1169 /* If non-null, this is the variant part we are currently
1171 variant_part_builder
*current_variant_part
= nullptr;
1172 /* This holds all the top-level variant parts attached to the type
1174 std::vector
<variant_part_builder
> variant_parts
;
1176 /* Return the total number of fields (including baseclasses). */
1177 int nfields () const
1179 return fields
.size () + baseclasses
.size ();
1183 /* Loaded secondary compilation units are kept in memory until they
1184 have not been referenced for the processing of this many
1185 compilation units. Set this to zero to disable caching. Cache
1186 sizes of up to at least twenty will improve startup time for
1187 typical inter-CU-reference binaries, at an obvious memory cost. */
1188 static int dwarf_max_cache_age
= 5;
1190 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1191 struct cmd_list_element
*c
, const char *value
)
1193 fprintf_filtered (file
, _("The upper bound on the age of cached "
1194 "DWARF compilation units is %s.\n"),
1198 /* local function prototypes */
1200 static void dwarf2_find_base_address (struct die_info
*die
,
1201 struct dwarf2_cu
*cu
);
1203 static dwarf2_psymtab
*create_partial_symtab
1204 (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
1207 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1208 const gdb_byte
*info_ptr
,
1209 struct die_info
*type_unit_die
);
1211 static void dwarf2_build_psymtabs_hard
1212 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1214 static void scan_partial_symbols (struct partial_die_info
*,
1215 CORE_ADDR
*, CORE_ADDR
*,
1216 int, struct dwarf2_cu
*);
1218 static void add_partial_symbol (struct partial_die_info
*,
1219 struct dwarf2_cu
*);
1221 static void add_partial_namespace (struct partial_die_info
*pdi
,
1222 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1223 int set_addrmap
, struct dwarf2_cu
*cu
);
1225 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1226 CORE_ADDR
*highpc
, int set_addrmap
,
1227 struct dwarf2_cu
*cu
);
1229 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1230 struct dwarf2_cu
*cu
);
1232 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1233 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1234 int need_pc
, struct dwarf2_cu
*cu
);
1236 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1238 static struct partial_die_info
*load_partial_dies
1239 (const struct die_reader_specs
*, const gdb_byte
*, int);
1241 /* A pair of partial_die_info and compilation unit. */
1242 struct cu_partial_die_info
1244 /* The compilation unit of the partial_die_info. */
1245 struct dwarf2_cu
*cu
;
1246 /* A partial_die_info. */
1247 struct partial_die_info
*pdi
;
1249 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1255 cu_partial_die_info () = delete;
1258 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1259 struct dwarf2_cu
*);
1261 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1262 struct attribute
*, struct attr_abbrev
*,
1263 const gdb_byte
*, bool *need_reprocess
);
1265 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1266 struct attribute
*attr
);
1268 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1270 static sect_offset read_abbrev_offset
1271 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1272 struct dwarf2_section_info
*, sect_offset
);
1274 static const char *read_indirect_string
1275 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1276 const struct comp_unit_head
*, unsigned int *);
1278 static const char *read_indirect_string_at_offset
1279 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1281 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1285 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1286 ULONGEST str_index
);
1288 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1289 ULONGEST str_index
);
1291 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1293 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1294 struct dwarf2_cu
*);
1296 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1297 struct dwarf2_cu
*cu
);
1299 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1301 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1302 struct dwarf2_cu
*cu
);
1304 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1306 static struct die_info
*die_specification (struct die_info
*die
,
1307 struct dwarf2_cu
**);
1309 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1310 struct dwarf2_cu
*cu
);
1312 static void dwarf_decode_lines (struct line_header
*, const char *,
1313 struct dwarf2_cu
*, dwarf2_psymtab
*,
1314 CORE_ADDR
, int decode_mapping
);
1316 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1319 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1320 struct dwarf2_cu
*, struct symbol
* = NULL
);
1322 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1323 struct dwarf2_cu
*);
1325 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1328 struct obstack
*obstack
,
1329 struct dwarf2_cu
*cu
, LONGEST
*value
,
1330 const gdb_byte
**bytes
,
1331 struct dwarf2_locexpr_baton
**baton
);
1333 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1335 static int need_gnat_info (struct dwarf2_cu
*);
1337 static struct type
*die_descriptive_type (struct die_info
*,
1338 struct dwarf2_cu
*);
1340 static void set_descriptive_type (struct type
*, struct die_info
*,
1341 struct dwarf2_cu
*);
1343 static struct type
*die_containing_type (struct die_info
*,
1344 struct dwarf2_cu
*);
1346 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1347 struct dwarf2_cu
*);
1349 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1351 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1353 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1355 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1356 const char *suffix
, int physname
,
1357 struct dwarf2_cu
*cu
);
1359 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1361 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1363 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1365 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1367 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1369 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1371 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1372 struct dwarf2_cu
*, dwarf2_psymtab
*);
1374 /* Return the .debug_loclists section to use for cu. */
1375 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1377 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1378 values. Keep the items ordered with increasing constraints compliance. */
1381 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1382 PC_BOUNDS_NOT_PRESENT
,
1384 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1385 were present but they do not form a valid range of PC addresses. */
1388 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1391 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1395 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1396 CORE_ADDR
*, CORE_ADDR
*,
1400 static void get_scope_pc_bounds (struct die_info
*,
1401 CORE_ADDR
*, CORE_ADDR
*,
1402 struct dwarf2_cu
*);
1404 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1405 CORE_ADDR
, struct dwarf2_cu
*);
1407 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1408 struct dwarf2_cu
*);
1410 static void dwarf2_attach_fields_to_type (struct field_info
*,
1411 struct type
*, struct dwarf2_cu
*);
1413 static void dwarf2_add_member_fn (struct field_info
*,
1414 struct die_info
*, struct type
*,
1415 struct dwarf2_cu
*);
1417 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1419 struct dwarf2_cu
*);
1421 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1423 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1425 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1427 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1429 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1431 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1433 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1435 static struct type
*read_module_type (struct die_info
*die
,
1436 struct dwarf2_cu
*cu
);
1438 static const char *namespace_name (struct die_info
*die
,
1439 int *is_anonymous
, struct dwarf2_cu
*);
1441 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1443 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1446 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1447 struct dwarf2_cu
*);
1449 static struct die_info
*read_die_and_siblings_1
1450 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1453 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1454 const gdb_byte
*info_ptr
,
1455 const gdb_byte
**new_info_ptr
,
1456 struct die_info
*parent
);
1458 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1459 struct die_info
**, const gdb_byte
*,
1462 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1463 struct die_info
**, const gdb_byte
*);
1465 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1467 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1470 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1472 static const char *dwarf2_full_name (const char *name
,
1473 struct die_info
*die
,
1474 struct dwarf2_cu
*cu
);
1476 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1477 struct dwarf2_cu
*cu
);
1479 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1480 struct dwarf2_cu
**);
1482 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1484 static void dump_die_for_error (struct die_info
*);
1486 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1489 /*static*/ void dump_die (struct die_info
*, int max_level
);
1491 static void store_in_ref_table (struct die_info
*,
1492 struct dwarf2_cu
*);
1494 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1495 const struct attribute
*,
1496 struct dwarf2_cu
**);
1498 static struct die_info
*follow_die_ref (struct die_info
*,
1499 const struct attribute
*,
1500 struct dwarf2_cu
**);
1502 static struct die_info
*follow_die_sig (struct die_info
*,
1503 const struct attribute
*,
1504 struct dwarf2_cu
**);
1506 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1507 struct dwarf2_cu
*);
1509 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1510 const struct attribute
*,
1511 struct dwarf2_cu
*);
1513 static void load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
1514 dwarf2_per_objfile
*per_objfile
);
1516 static void read_signatured_type (signatured_type
*sig_type
,
1517 dwarf2_per_objfile
*per_objfile
);
1519 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1520 struct die_info
*die
, struct dwarf2_cu
*cu
,
1521 struct dynamic_prop
*prop
, struct type
*type
);
1523 /* memory allocation interface */
1525 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1527 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1529 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1531 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1532 struct dwarf2_loclist_baton
*baton
,
1533 const struct attribute
*attr
);
1535 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1537 struct dwarf2_cu
*cu
,
1540 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1541 const gdb_byte
*info_ptr
,
1542 struct abbrev_info
*abbrev
);
1544 static hashval_t
partial_die_hash (const void *item
);
1546 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1548 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1549 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1550 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1552 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1553 struct die_info
*comp_unit_die
,
1554 enum language pretend_language
);
1556 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1558 static void free_one_cached_comp_unit (dwarf2_per_cu_data
*target_per_cu
,
1559 dwarf2_per_objfile
*per_objfile
);
1561 static struct type
*set_die_type (struct die_info
*, struct type
*,
1562 struct dwarf2_cu
*);
1564 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1566 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1568 static void load_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
1569 dwarf2_per_objfile
*per_objfile
,
1571 enum language pretend_language
);
1573 static void process_full_comp_unit (dwarf2_cu
*cu
,
1574 enum language pretend_language
);
1576 static void process_full_type_unit (dwarf2_cu
*cu
,
1577 enum language pretend_language
);
1579 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1580 struct dwarf2_per_cu_data
*);
1582 static void dwarf2_mark (struct dwarf2_cu
*);
1584 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1586 static struct type
*get_die_type_at_offset (sect_offset
,
1587 dwarf2_per_cu_data
*per_cu
,
1588 dwarf2_per_objfile
*per_objfile
);
1590 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1592 static void queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
1593 dwarf2_per_objfile
*per_objfile
,
1594 enum language pretend_language
);
1596 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1598 /* Class, the destructor of which frees all allocated queue entries. This
1599 will only have work to do if an error was thrown while processing the
1600 dwarf. If no error was thrown then the queue entries should have all
1601 been processed, and freed, as we went along. */
1603 class dwarf2_queue_guard
1606 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1607 : m_per_objfile (per_objfile
)
1611 /* Free any entries remaining on the queue. There should only be
1612 entries left if we hit an error while processing the dwarf. */
1613 ~dwarf2_queue_guard ()
1615 /* Ensure that no memory is allocated by the queue. */
1616 std::queue
<dwarf2_queue_item
> empty
;
1617 std::swap (m_per_objfile
->per_bfd
->queue
, empty
);
1620 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1623 dwarf2_per_objfile
*m_per_objfile
;
1626 dwarf2_queue_item::~dwarf2_queue_item ()
1628 /* Anything still marked queued is likely to be in an
1629 inconsistent state, so discard it. */
1632 if (per_cu
->cu
!= NULL
)
1633 free_one_cached_comp_unit (per_cu
, per_objfile
);
1638 /* The return type of find_file_and_directory. Note, the enclosed
1639 string pointers are only valid while this object is valid. */
1641 struct file_and_directory
1643 /* The filename. This is never NULL. */
1646 /* The compilation directory. NULL if not known. If we needed to
1647 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1648 points directly to the DW_AT_comp_dir string attribute owned by
1649 the obstack that owns the DIE. */
1650 const char *comp_dir
;
1652 /* If we needed to build a new string for comp_dir, this is what
1653 owns the storage. */
1654 std::string comp_dir_storage
;
1657 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1658 struct dwarf2_cu
*cu
);
1660 static htab_up
allocate_signatured_type_table ();
1662 static htab_up
allocate_dwo_unit_table ();
1664 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1665 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1666 struct dwp_file
*dwp_file
, const char *comp_dir
,
1667 ULONGEST signature
, int is_debug_types
);
1669 static struct dwp_file
*get_dwp_file
1670 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1672 static struct dwo_unit
*lookup_dwo_comp_unit
1673 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
1674 ULONGEST signature
);
1676 static struct dwo_unit
*lookup_dwo_type_unit
1677 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
);
1679 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1681 /* A unique pointer to a dwo_file. */
1683 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1685 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1687 static void check_producer (struct dwarf2_cu
*cu
);
1689 static void free_line_header_voidp (void *arg
);
1691 /* Various complaints about symbol reading that don't abort the process. */
1694 dwarf2_debug_line_missing_file_complaint (void)
1696 complaint (_(".debug_line section has line data without a file"));
1700 dwarf2_debug_line_missing_end_sequence_complaint (void)
1702 complaint (_(".debug_line section has line "
1703 "program sequence without an end"));
1707 dwarf2_complex_location_expr_complaint (void)
1709 complaint (_("location expression too complex"));
1713 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1716 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1721 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1723 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1727 /* Hash function for line_header_hash. */
1730 line_header_hash (const struct line_header
*ofs
)
1732 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1735 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1738 line_header_hash_voidp (const void *item
)
1740 const struct line_header
*ofs
= (const struct line_header
*) item
;
1742 return line_header_hash (ofs
);
1745 /* Equality function for line_header_hash. */
1748 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1750 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1751 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1753 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1754 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1759 /* See declaration. */
1761 dwarf2_per_bfd::dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
,
1764 can_copy (can_copy_
)
1767 names
= &dwarf2_elf_names
;
1769 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1770 locate_sections (obfd
, sec
, *names
);
1773 dwarf2_per_bfd::~dwarf2_per_bfd ()
1775 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1776 free_cached_comp_units ();
1778 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1779 per_cu
->imported_symtabs_free ();
1781 for (signatured_type
*sig_type
: all_type_units
)
1782 sig_type
->per_cu
.imported_symtabs_free ();
1784 /* Everything else should be on this->obstack. */
1787 /* See declaration. */
1790 dwarf2_per_bfd::free_cached_comp_units ()
1792 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1793 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1794 while (per_cu
!= NULL
)
1796 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1799 *last_chain
= next_cu
;
1804 /* A helper class that calls free_cached_comp_units on
1807 class free_cached_comp_units
1811 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1812 : m_per_objfile (per_objfile
)
1816 ~free_cached_comp_units ()
1818 m_per_objfile
->per_bfd
->free_cached_comp_units ();
1821 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1825 dwarf2_per_objfile
*m_per_objfile
;
1831 dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data
*per_cu
) const
1833 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1835 return this->m_symtabs
[per_cu
->index
] != nullptr;
1841 dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data
*per_cu
) const
1843 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1845 return this->m_symtabs
[per_cu
->index
];
1851 dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data
*per_cu
,
1852 compunit_symtab
*symtab
)
1854 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1855 gdb_assert (this->m_symtabs
[per_cu
->index
] == nullptr);
1857 this->m_symtabs
[per_cu
->index
] = symtab
;
1860 /* Try to locate the sections we need for DWARF 2 debugging
1861 information and return true if we have enough to do something.
1862 NAMES points to the dwarf2 section names, or is NULL if the standard
1863 ELF names are used. CAN_COPY is true for formats where symbol
1864 interposition is possible and so symbol values must follow copy
1865 relocation rules. */
1868 dwarf2_has_info (struct objfile
*objfile
,
1869 const struct dwarf2_debug_sections
*names
,
1872 if (objfile
->flags
& OBJF_READNEVER
)
1875 struct dwarf2_per_objfile
*dwarf2_per_objfile
1876 = get_dwarf2_per_objfile (objfile
);
1878 if (dwarf2_per_objfile
== NULL
)
1880 /* For now, each dwarf2_per_objfile owns its own dwarf2_per_bfd (no
1882 dwarf2_per_bfd
*per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1884 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
, per_bfd
);
1887 return (!dwarf2_per_objfile
->per_bfd
->info
.is_virtual
1888 && dwarf2_per_objfile
->per_bfd
->info
.s
.section
!= NULL
1889 && !dwarf2_per_objfile
->per_bfd
->abbrev
.is_virtual
1890 && dwarf2_per_objfile
->per_bfd
->abbrev
.s
.section
!= NULL
);
1893 /* When loading sections, we look either for uncompressed section or for
1894 compressed section names. */
1897 section_is_p (const char *section_name
,
1898 const struct dwarf2_section_names
*names
)
1900 if (names
->normal
!= NULL
1901 && strcmp (section_name
, names
->normal
) == 0)
1903 if (names
->compressed
!= NULL
1904 && strcmp (section_name
, names
->compressed
) == 0)
1909 /* See declaration. */
1912 dwarf2_per_bfd::locate_sections (bfd
*abfd
, asection
*sectp
,
1913 const dwarf2_debug_sections
&names
)
1915 flagword aflag
= bfd_section_flags (sectp
);
1917 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1920 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1921 > bfd_get_file_size (abfd
))
1923 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1924 warning (_("Discarding section %s which has a section size (%s"
1925 ") larger than the file size [in module %s]"),
1926 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1927 bfd_get_filename (abfd
));
1929 else if (section_is_p (sectp
->name
, &names
.info
))
1931 this->info
.s
.section
= sectp
;
1932 this->info
.size
= bfd_section_size (sectp
);
1934 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1936 this->abbrev
.s
.section
= sectp
;
1937 this->abbrev
.size
= bfd_section_size (sectp
);
1939 else if (section_is_p (sectp
->name
, &names
.line
))
1941 this->line
.s
.section
= sectp
;
1942 this->line
.size
= bfd_section_size (sectp
);
1944 else if (section_is_p (sectp
->name
, &names
.loc
))
1946 this->loc
.s
.section
= sectp
;
1947 this->loc
.size
= bfd_section_size (sectp
);
1949 else if (section_is_p (sectp
->name
, &names
.loclists
))
1951 this->loclists
.s
.section
= sectp
;
1952 this->loclists
.size
= bfd_section_size (sectp
);
1954 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1956 this->macinfo
.s
.section
= sectp
;
1957 this->macinfo
.size
= bfd_section_size (sectp
);
1959 else if (section_is_p (sectp
->name
, &names
.macro
))
1961 this->macro
.s
.section
= sectp
;
1962 this->macro
.size
= bfd_section_size (sectp
);
1964 else if (section_is_p (sectp
->name
, &names
.str
))
1966 this->str
.s
.section
= sectp
;
1967 this->str
.size
= bfd_section_size (sectp
);
1969 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1971 this->str_offsets
.s
.section
= sectp
;
1972 this->str_offsets
.size
= bfd_section_size (sectp
);
1974 else if (section_is_p (sectp
->name
, &names
.line_str
))
1976 this->line_str
.s
.section
= sectp
;
1977 this->line_str
.size
= bfd_section_size (sectp
);
1979 else if (section_is_p (sectp
->name
, &names
.addr
))
1981 this->addr
.s
.section
= sectp
;
1982 this->addr
.size
= bfd_section_size (sectp
);
1984 else if (section_is_p (sectp
->name
, &names
.frame
))
1986 this->frame
.s
.section
= sectp
;
1987 this->frame
.size
= bfd_section_size (sectp
);
1989 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1991 this->eh_frame
.s
.section
= sectp
;
1992 this->eh_frame
.size
= bfd_section_size (sectp
);
1994 else if (section_is_p (sectp
->name
, &names
.ranges
))
1996 this->ranges
.s
.section
= sectp
;
1997 this->ranges
.size
= bfd_section_size (sectp
);
1999 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2001 this->rnglists
.s
.section
= sectp
;
2002 this->rnglists
.size
= bfd_section_size (sectp
);
2004 else if (section_is_p (sectp
->name
, &names
.types
))
2006 struct dwarf2_section_info type_section
;
2008 memset (&type_section
, 0, sizeof (type_section
));
2009 type_section
.s
.section
= sectp
;
2010 type_section
.size
= bfd_section_size (sectp
);
2012 this->types
.push_back (type_section
);
2014 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2016 this->gdb_index
.s
.section
= sectp
;
2017 this->gdb_index
.size
= bfd_section_size (sectp
);
2019 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2021 this->debug_names
.s
.section
= sectp
;
2022 this->debug_names
.size
= bfd_section_size (sectp
);
2024 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2026 this->debug_aranges
.s
.section
= sectp
;
2027 this->debug_aranges
.size
= bfd_section_size (sectp
);
2030 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2031 && bfd_section_vma (sectp
) == 0)
2032 this->has_section_at_zero
= true;
2035 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2039 dwarf2_get_section_info (struct objfile
*objfile
,
2040 enum dwarf2_section_enum sect
,
2041 asection
**sectp
, const gdb_byte
**bufp
,
2042 bfd_size_type
*sizep
)
2044 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2045 struct dwarf2_section_info
*info
;
2047 /* We may see an objfile without any DWARF, in which case we just
2058 case DWARF2_DEBUG_FRAME
:
2059 info
= &data
->per_bfd
->frame
;
2061 case DWARF2_EH_FRAME
:
2062 info
= &data
->per_bfd
->eh_frame
;
2065 gdb_assert_not_reached ("unexpected section");
2068 info
->read (objfile
);
2070 *sectp
= info
->get_bfd_section ();
2071 *bufp
= info
->buffer
;
2072 *sizep
= info
->size
;
2075 /* A helper function to find the sections for a .dwz file. */
2078 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2080 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2082 /* Note that we only support the standard ELF names, because .dwz
2083 is ELF-only (at the time of writing). */
2084 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2086 dwz_file
->abbrev
.s
.section
= sectp
;
2087 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2089 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2091 dwz_file
->info
.s
.section
= sectp
;
2092 dwz_file
->info
.size
= bfd_section_size (sectp
);
2094 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2096 dwz_file
->str
.s
.section
= sectp
;
2097 dwz_file
->str
.size
= bfd_section_size (sectp
);
2099 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2101 dwz_file
->line
.s
.section
= sectp
;
2102 dwz_file
->line
.size
= bfd_section_size (sectp
);
2104 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2106 dwz_file
->macro
.s
.section
= sectp
;
2107 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2109 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2111 dwz_file
->gdb_index
.s
.section
= sectp
;
2112 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2114 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2116 dwz_file
->debug_names
.s
.section
= sectp
;
2117 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2121 /* See dwarf2read.h. */
2124 dwarf2_get_dwz_file (dwarf2_per_bfd
*per_bfd
)
2126 const char *filename
;
2127 bfd_size_type buildid_len_arg
;
2131 if (per_bfd
->dwz_file
!= NULL
)
2132 return per_bfd
->dwz_file
.get ();
2134 bfd_set_error (bfd_error_no_error
);
2135 gdb::unique_xmalloc_ptr
<char> data
2136 (bfd_get_alt_debug_link_info (per_bfd
->obfd
,
2137 &buildid_len_arg
, &buildid
));
2140 if (bfd_get_error () == bfd_error_no_error
)
2142 error (_("could not read '.gnu_debugaltlink' section: %s"),
2143 bfd_errmsg (bfd_get_error ()));
2146 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2148 buildid_len
= (size_t) buildid_len_arg
;
2150 filename
= data
.get ();
2152 std::string abs_storage
;
2153 if (!IS_ABSOLUTE_PATH (filename
))
2155 gdb::unique_xmalloc_ptr
<char> abs
2156 = gdb_realpath (bfd_get_filename (per_bfd
->obfd
));
2158 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2159 filename
= abs_storage
.c_str ();
2162 /* First try the file name given in the section. If that doesn't
2163 work, try to use the build-id instead. */
2164 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
));
2165 if (dwz_bfd
!= NULL
)
2167 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2168 dwz_bfd
.reset (nullptr);
2171 if (dwz_bfd
== NULL
)
2172 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2174 if (dwz_bfd
== nullptr)
2176 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2177 const char *origname
= bfd_get_filename (per_bfd
->obfd
);
2179 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2186 /* File successfully retrieved from server. */
2187 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2189 if (dwz_bfd
== nullptr)
2190 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2191 alt_filename
.get ());
2192 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2193 dwz_bfd
.reset (nullptr);
2197 if (dwz_bfd
== NULL
)
2198 error (_("could not find '.gnu_debugaltlink' file for %s"),
2199 bfd_get_filename (per_bfd
->obfd
));
2201 std::unique_ptr
<struct dwz_file
> result
2202 (new struct dwz_file (std::move (dwz_bfd
)));
2204 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2207 gdb_bfd_record_inclusion (per_bfd
->obfd
, result
->dwz_bfd
.get ());
2208 per_bfd
->dwz_file
= std::move (result
);
2209 return per_bfd
->dwz_file
.get ();
2212 /* DWARF quick_symbols_functions support. */
2214 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2215 unique line tables, so we maintain a separate table of all .debug_line
2216 derived entries to support the sharing.
2217 All the quick functions need is the list of file names. We discard the
2218 line_header when we're done and don't need to record it here. */
2219 struct quick_file_names
2221 /* The data used to construct the hash key. */
2222 struct stmt_list_hash hash
;
2224 /* The number of entries in file_names, real_names. */
2225 unsigned int num_file_names
;
2227 /* The file names from the line table, after being run through
2229 const char **file_names
;
2231 /* The file names from the line table after being run through
2232 gdb_realpath. These are computed lazily. */
2233 const char **real_names
;
2236 /* When using the index (and thus not using psymtabs), each CU has an
2237 object of this type. This is used to hold information needed by
2238 the various "quick" methods. */
2239 struct dwarf2_per_cu_quick_data
2241 /* The file table. This can be NULL if there was no file table
2242 or it's currently not read in.
2243 NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */
2244 struct quick_file_names
*file_names
;
2246 /* A temporary mark bit used when iterating over all CUs in
2247 expand_symtabs_matching. */
2248 unsigned int mark
: 1;
2250 /* True if we've tried to read the file table and found there isn't one.
2251 There will be no point in trying to read it again next time. */
2252 unsigned int no_file_data
: 1;
2255 /* Utility hash function for a stmt_list_hash. */
2258 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2262 if (stmt_list_hash
->dwo_unit
!= NULL
)
2263 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2264 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2268 /* Utility equality function for a stmt_list_hash. */
2271 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2272 const struct stmt_list_hash
*rhs
)
2274 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2276 if (lhs
->dwo_unit
!= NULL
2277 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2280 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2283 /* Hash function for a quick_file_names. */
2286 hash_file_name_entry (const void *e
)
2288 const struct quick_file_names
*file_data
2289 = (const struct quick_file_names
*) e
;
2291 return hash_stmt_list_entry (&file_data
->hash
);
2294 /* Equality function for a quick_file_names. */
2297 eq_file_name_entry (const void *a
, const void *b
)
2299 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2300 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2302 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2305 /* Delete function for a quick_file_names. */
2308 delete_file_name_entry (void *e
)
2310 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2313 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2315 xfree ((void*) file_data
->file_names
[i
]);
2316 if (file_data
->real_names
)
2317 xfree ((void*) file_data
->real_names
[i
]);
2320 /* The space for the struct itself lives on the obstack, so we don't
2324 /* Create a quick_file_names hash table. */
2327 create_quick_file_names_table (unsigned int nr_initial_entries
)
2329 return htab_up (htab_create_alloc (nr_initial_entries
,
2330 hash_file_name_entry
, eq_file_name_entry
,
2331 delete_file_name_entry
, xcalloc
, xfree
));
2334 /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This
2335 function is unrelated to symtabs, symtab would have to be created afterwards.
2336 You should call age_cached_comp_units after processing the CU. */
2339 load_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
2342 if (per_cu
->is_debug_types
)
2343 load_full_type_unit (per_cu
, per_objfile
);
2345 load_full_comp_unit (per_cu
, per_objfile
, skip_partial
, language_minimal
);
2347 if (per_cu
->cu
== NULL
)
2348 return; /* Dummy CU. */
2350 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2353 /* Read in the symbols for PER_CU in the context of DWARF"_PER_OBJFILE. */
2356 dw2_do_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2357 dwarf2_per_objfile
*dwarf2_per_objfile
,
2360 /* Skip type_unit_groups, reading the type units they contain
2361 is handled elsewhere. */
2362 if (per_cu
->type_unit_group_p ())
2365 /* The destructor of dwarf2_queue_guard frees any entries left on
2366 the queue. After this point we're guaranteed to leave this function
2367 with the dwarf queue empty. */
2368 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2370 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
2372 queue_comp_unit (per_cu
, dwarf2_per_objfile
, language_minimal
);
2373 load_cu (per_cu
, dwarf2_per_objfile
, skip_partial
);
2375 /* If we just loaded a CU from a DWO, and we're working with an index
2376 that may badly handle TUs, load all the TUs in that DWO as well.
2377 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2378 if (!per_cu
->is_debug_types
2379 && per_cu
->cu
!= NULL
2380 && per_cu
->cu
->dwo_unit
!= NULL
2381 && dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
2382 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7
2383 /* DWP files aren't supported yet. */
2384 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2385 queue_and_load_all_dwo_tus (per_cu
);
2388 process_queue (dwarf2_per_objfile
);
2390 /* Age the cache, releasing compilation units that have not
2391 been used recently. */
2392 age_cached_comp_units (dwarf2_per_objfile
);
2395 /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is
2396 the per-objfile for which this symtab is instantiated.
2398 Returns the resulting symbol table. */
2400 static struct compunit_symtab
*
2401 dw2_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2402 dwarf2_per_objfile
*dwarf2_per_objfile
,
2405 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
2407 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
2409 free_cached_comp_units
freer (dwarf2_per_objfile
);
2410 scoped_restore decrementer
= increment_reading_symtab ();
2411 dw2_do_instantiate_symtab (per_cu
, dwarf2_per_objfile
, skip_partial
);
2412 process_cu_includes (dwarf2_per_objfile
);
2415 return dwarf2_per_objfile
->get_symtab (per_cu
);
2418 /* See declaration. */
2420 dwarf2_per_cu_data
*
2421 dwarf2_per_bfd::get_cutu (int index
)
2423 if (index
>= this->all_comp_units
.size ())
2425 index
-= this->all_comp_units
.size ();
2426 gdb_assert (index
< this->all_type_units
.size ());
2427 return &this->all_type_units
[index
]->per_cu
;
2430 return this->all_comp_units
[index
];
2433 /* See declaration. */
2435 dwarf2_per_cu_data
*
2436 dwarf2_per_bfd::get_cu (int index
)
2438 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2440 return this->all_comp_units
[index
];
2443 /* See declaration. */
2446 dwarf2_per_bfd::get_tu (int index
)
2448 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2450 return this->all_type_units
[index
];
2455 dwarf2_per_cu_data
*
2456 dwarf2_per_bfd::allocate_per_cu ()
2458 dwarf2_per_cu_data
*result
= OBSTACK_ZALLOC (&obstack
, dwarf2_per_cu_data
);
2459 result
->per_bfd
= this;
2460 result
->index
= m_num_psymtabs
++;
2467 dwarf2_per_bfd::allocate_signatured_type ()
2469 signatured_type
*result
= OBSTACK_ZALLOC (&obstack
, signatured_type
);
2470 result
->per_cu
.per_bfd
= this;
2471 result
->per_cu
.index
= m_num_psymtabs
++;
2475 /* Return a new dwarf2_per_cu_data allocated on the per-bfd
2476 obstack, and constructed with the specified field values. */
2478 static dwarf2_per_cu_data
*
2479 create_cu_from_index_list (dwarf2_per_bfd
*per_bfd
,
2480 struct dwarf2_section_info
*section
,
2482 sect_offset sect_off
, ULONGEST length
)
2484 dwarf2_per_cu_data
*the_cu
= per_bfd
->allocate_per_cu ();
2485 the_cu
->sect_off
= sect_off
;
2486 the_cu
->length
= length
;
2487 the_cu
->section
= section
;
2488 the_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
2489 struct dwarf2_per_cu_quick_data
);
2490 the_cu
->is_dwz
= is_dwz
;
2494 /* A helper for create_cus_from_index that handles a given list of
2498 create_cus_from_index_list (dwarf2_per_bfd
*per_bfd
,
2499 const gdb_byte
*cu_list
, offset_type n_elements
,
2500 struct dwarf2_section_info
*section
,
2503 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2505 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2507 sect_offset sect_off
2508 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2509 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2512 dwarf2_per_cu_data
*per_cu
2513 = create_cu_from_index_list (per_bfd
, section
, is_dwz
, sect_off
,
2515 per_bfd
->all_comp_units
.push_back (per_cu
);
2519 /* Read the CU list from the mapped index, and use it to create all
2520 the CU objects for PER_BFD. */
2523 create_cus_from_index (dwarf2_per_bfd
*per_bfd
,
2524 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2525 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2527 gdb_assert (per_bfd
->all_comp_units
.empty ());
2528 per_bfd
->all_comp_units
.reserve ((cu_list_elements
+ dwz_elements
) / 2);
2530 create_cus_from_index_list (per_bfd
, cu_list
, cu_list_elements
,
2533 if (dwz_elements
== 0)
2536 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
2537 create_cus_from_index_list (per_bfd
, dwz_list
, dwz_elements
,
2541 /* Create the signatured type hash table from the index. */
2544 create_signatured_type_table_from_index
2545 (dwarf2_per_bfd
*per_bfd
, struct dwarf2_section_info
*section
,
2546 const gdb_byte
*bytes
, offset_type elements
)
2548 gdb_assert (per_bfd
->all_type_units
.empty ());
2549 per_bfd
->all_type_units
.reserve (elements
/ 3);
2551 htab_up sig_types_hash
= allocate_signatured_type_table ();
2553 for (offset_type i
= 0; i
< elements
; i
+= 3)
2555 struct signatured_type
*sig_type
;
2558 cu_offset type_offset_in_tu
;
2560 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2561 sect_offset sect_off
2562 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2564 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2566 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2569 sig_type
= per_bfd
->allocate_signatured_type ();
2570 sig_type
->signature
= signature
;
2571 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2572 sig_type
->per_cu
.is_debug_types
= 1;
2573 sig_type
->per_cu
.section
= section
;
2574 sig_type
->per_cu
.sect_off
= sect_off
;
2575 sig_type
->per_cu
.v
.quick
2576 = OBSTACK_ZALLOC (&per_bfd
->obstack
,
2577 struct dwarf2_per_cu_quick_data
);
2579 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2582 per_bfd
->all_type_units
.push_back (sig_type
);
2585 per_bfd
->signatured_types
= std::move (sig_types_hash
);
2588 /* Create the signatured type hash table from .debug_names. */
2591 create_signatured_type_table_from_debug_names
2592 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2593 const mapped_debug_names
&map
,
2594 struct dwarf2_section_info
*section
,
2595 struct dwarf2_section_info
*abbrev_section
)
2597 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2599 section
->read (objfile
);
2600 abbrev_section
->read (objfile
);
2602 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
2603 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve (map
.tu_count
);
2605 htab_up sig_types_hash
= allocate_signatured_type_table ();
2607 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2609 struct signatured_type
*sig_type
;
2612 sect_offset sect_off
2613 = (sect_offset
) (extract_unsigned_integer
2614 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2616 map
.dwarf5_byte_order
));
2618 comp_unit_head cu_header
;
2619 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2621 section
->buffer
+ to_underlying (sect_off
),
2624 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
2625 sig_type
->signature
= cu_header
.signature
;
2626 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2627 sig_type
->per_cu
.is_debug_types
= 1;
2628 sig_type
->per_cu
.section
= section
;
2629 sig_type
->per_cu
.sect_off
= sect_off
;
2630 sig_type
->per_cu
.v
.quick
2631 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2632 struct dwarf2_per_cu_quick_data
);
2634 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2637 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2640 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2643 /* Read the address map data from the mapped index, and use it to
2644 populate the objfile's psymtabs_addrmap. */
2647 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2648 struct mapped_index
*index
)
2650 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2651 struct gdbarch
*gdbarch
= objfile
->arch ();
2652 const gdb_byte
*iter
, *end
;
2653 struct addrmap
*mutable_map
;
2656 auto_obstack temp_obstack
;
2658 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2660 iter
= index
->address_table
.data ();
2661 end
= iter
+ index
->address_table
.size ();
2663 baseaddr
= objfile
->text_section_offset ();
2667 ULONGEST hi
, lo
, cu_index
;
2668 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2670 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2672 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2677 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2678 hex_string (lo
), hex_string (hi
));
2682 if (cu_index
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
2684 complaint (_(".gdb_index address table has invalid CU number %u"),
2685 (unsigned) cu_index
);
2689 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2690 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2691 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2692 dwarf2_per_objfile
->per_bfd
->get_cu (cu_index
));
2695 objfile
->partial_symtabs
->psymtabs_addrmap
2696 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2699 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2700 populate the objfile's psymtabs_addrmap. */
2703 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2704 struct dwarf2_section_info
*section
)
2706 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2707 bfd
*abfd
= objfile
->obfd
;
2708 struct gdbarch
*gdbarch
= objfile
->arch ();
2709 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2711 auto_obstack temp_obstack
;
2712 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2714 std::unordered_map
<sect_offset
,
2715 dwarf2_per_cu_data
*,
2716 gdb::hash_enum
<sect_offset
>>
2717 debug_info_offset_to_per_cu
;
2718 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
2720 const auto insertpair
2721 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2722 if (!insertpair
.second
)
2724 warning (_("Section .debug_aranges in %s has duplicate "
2725 "debug_info_offset %s, ignoring .debug_aranges."),
2726 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2731 section
->read (objfile
);
2733 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2735 const gdb_byte
*addr
= section
->buffer
;
2737 while (addr
< section
->buffer
+ section
->size
)
2739 const gdb_byte
*const entry_addr
= addr
;
2740 unsigned int bytes_read
;
2742 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2746 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2747 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2748 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2749 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2751 warning (_("Section .debug_aranges in %s entry at offset %s "
2752 "length %s exceeds section length %s, "
2753 "ignoring .debug_aranges."),
2754 objfile_name (objfile
),
2755 plongest (entry_addr
- section
->buffer
),
2756 plongest (bytes_read
+ entry_length
),
2757 pulongest (section
->size
));
2761 /* The version number. */
2762 const uint16_t version
= read_2_bytes (abfd
, addr
);
2766 warning (_("Section .debug_aranges in %s entry at offset %s "
2767 "has unsupported version %d, ignoring .debug_aranges."),
2768 objfile_name (objfile
),
2769 plongest (entry_addr
- section
->buffer
), version
);
2773 const uint64_t debug_info_offset
2774 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2775 addr
+= offset_size
;
2776 const auto per_cu_it
2777 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2778 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2780 warning (_("Section .debug_aranges in %s entry at offset %s "
2781 "debug_info_offset %s does not exists, "
2782 "ignoring .debug_aranges."),
2783 objfile_name (objfile
),
2784 plongest (entry_addr
- section
->buffer
),
2785 pulongest (debug_info_offset
));
2788 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2790 const uint8_t address_size
= *addr
++;
2791 if (address_size
< 1 || address_size
> 8)
2793 warning (_("Section .debug_aranges in %s entry at offset %s "
2794 "address_size %u is invalid, ignoring .debug_aranges."),
2795 objfile_name (objfile
),
2796 plongest (entry_addr
- section
->buffer
), address_size
);
2800 const uint8_t segment_selector_size
= *addr
++;
2801 if (segment_selector_size
!= 0)
2803 warning (_("Section .debug_aranges in %s entry at offset %s "
2804 "segment_selector_size %u is not supported, "
2805 "ignoring .debug_aranges."),
2806 objfile_name (objfile
),
2807 plongest (entry_addr
- section
->buffer
),
2808 segment_selector_size
);
2812 /* Must pad to an alignment boundary that is twice the address
2813 size. It is undocumented by the DWARF standard but GCC does
2815 for (size_t padding
= ((-(addr
- section
->buffer
))
2816 & (2 * address_size
- 1));
2817 padding
> 0; padding
--)
2820 warning (_("Section .debug_aranges in %s entry at offset %s "
2821 "padding is not zero, ignoring .debug_aranges."),
2822 objfile_name (objfile
),
2823 plongest (entry_addr
- section
->buffer
));
2829 if (addr
+ 2 * address_size
> entry_end
)
2831 warning (_("Section .debug_aranges in %s entry at offset %s "
2832 "address list is not properly terminated, "
2833 "ignoring .debug_aranges."),
2834 objfile_name (objfile
),
2835 plongest (entry_addr
- section
->buffer
));
2838 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2840 addr
+= address_size
;
2841 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2843 addr
+= address_size
;
2844 if (start
== 0 && length
== 0)
2846 if (start
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
2848 /* Symbol was eliminated due to a COMDAT group. */
2851 ULONGEST end
= start
+ length
;
2852 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2854 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2856 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2860 objfile
->partial_symtabs
->psymtabs_addrmap
2861 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2864 /* Find a slot in the mapped index INDEX for the object named NAME.
2865 If NAME is found, set *VEC_OUT to point to the CU vector in the
2866 constant pool and return true. If NAME cannot be found, return
2870 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2871 offset_type
**vec_out
)
2874 offset_type slot
, step
;
2875 int (*cmp
) (const char *, const char *);
2877 gdb::unique_xmalloc_ptr
<char> without_params
;
2878 if (current_language
->la_language
== language_cplus
2879 || current_language
->la_language
== language_fortran
2880 || current_language
->la_language
== language_d
)
2882 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2885 if (strchr (name
, '(') != NULL
)
2887 without_params
= cp_remove_params (name
);
2889 if (without_params
!= NULL
)
2890 name
= without_params
.get ();
2894 /* Index version 4 did not support case insensitive searches. But the
2895 indices for case insensitive languages are built in lowercase, therefore
2896 simulate our NAME being searched is also lowercased. */
2897 hash
= mapped_index_string_hash ((index
->version
== 4
2898 && case_sensitivity
== case_sensitive_off
2899 ? 5 : index
->version
),
2902 slot
= hash
& (index
->symbol_table
.size () - 1);
2903 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2904 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2910 const auto &bucket
= index
->symbol_table
[slot
];
2911 if (bucket
.name
== 0 && bucket
.vec
== 0)
2914 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2915 if (!cmp (name
, str
))
2917 *vec_out
= (offset_type
*) (index
->constant_pool
2918 + MAYBE_SWAP (bucket
.vec
));
2922 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2926 /* A helper function that reads the .gdb_index from BUFFER and fills
2927 in MAP. FILENAME is the name of the file containing the data;
2928 it is used for error reporting. DEPRECATED_OK is true if it is
2929 ok to use deprecated sections.
2931 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2932 out parameters that are filled in with information about the CU and
2933 TU lists in the section.
2935 Returns true if all went well, false otherwise. */
2938 read_gdb_index_from_buffer (const char *filename
,
2940 gdb::array_view
<const gdb_byte
> buffer
,
2941 struct mapped_index
*map
,
2942 const gdb_byte
**cu_list
,
2943 offset_type
*cu_list_elements
,
2944 const gdb_byte
**types_list
,
2945 offset_type
*types_list_elements
)
2947 const gdb_byte
*addr
= &buffer
[0];
2949 /* Version check. */
2950 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2951 /* Versions earlier than 3 emitted every copy of a psymbol. This
2952 causes the index to behave very poorly for certain requests. Version 3
2953 contained incomplete addrmap. So, it seems better to just ignore such
2957 static int warning_printed
= 0;
2958 if (!warning_printed
)
2960 warning (_("Skipping obsolete .gdb_index section in %s."),
2962 warning_printed
= 1;
2966 /* Index version 4 uses a different hash function than index version
2969 Versions earlier than 6 did not emit psymbols for inlined
2970 functions. Using these files will cause GDB not to be able to
2971 set breakpoints on inlined functions by name, so we ignore these
2972 indices unless the user has done
2973 "set use-deprecated-index-sections on". */
2974 if (version
< 6 && !deprecated_ok
)
2976 static int warning_printed
= 0;
2977 if (!warning_printed
)
2980 Skipping deprecated .gdb_index section in %s.\n\
2981 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2982 to use the section anyway."),
2984 warning_printed
= 1;
2988 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2989 of the TU (for symbols coming from TUs),
2990 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2991 Plus gold-generated indices can have duplicate entries for global symbols,
2992 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2993 These are just performance bugs, and we can't distinguish gdb-generated
2994 indices from gold-generated ones, so issue no warning here. */
2996 /* Indexes with higher version than the one supported by GDB may be no
2997 longer backward compatible. */
3001 map
->version
= version
;
3003 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3006 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3007 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3011 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3012 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3013 - MAYBE_SWAP (metadata
[i
]))
3017 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3018 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3020 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3023 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3024 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3026 = gdb::array_view
<mapped_index::symbol_table_slot
>
3027 ((mapped_index::symbol_table_slot
*) symbol_table
,
3028 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3031 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3036 /* Callback types for dwarf2_read_gdb_index. */
3038 typedef gdb::function_view
3039 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_bfd
*)>
3040 get_gdb_index_contents_ftype
;
3041 typedef gdb::function_view
3042 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3043 get_gdb_index_contents_dwz_ftype
;
3045 /* Read .gdb_index. If everything went ok, initialize the "quick"
3046 elements of all the CUs and return 1. Otherwise, return 0. */
3049 dwarf2_read_gdb_index
3050 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3051 get_gdb_index_contents_ftype get_gdb_index_contents
,
3052 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3054 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3055 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3056 struct dwz_file
*dwz
;
3057 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3059 gdb::array_view
<const gdb_byte
> main_index_contents
3060 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
->per_bfd
);
3062 if (main_index_contents
.empty ())
3065 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3066 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3067 use_deprecated_index_sections
,
3068 main_index_contents
, map
.get (), &cu_list
,
3069 &cu_list_elements
, &types_list
,
3070 &types_list_elements
))
3073 /* Don't use the index if it's empty. */
3074 if (map
->symbol_table
.empty ())
3077 /* If there is a .dwz file, read it so we can get its CU list as
3079 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
3082 struct mapped_index dwz_map
;
3083 const gdb_byte
*dwz_types_ignore
;
3084 offset_type dwz_types_elements_ignore
;
3086 gdb::array_view
<const gdb_byte
> dwz_index_content
3087 = get_gdb_index_contents_dwz (objfile
, dwz
);
3089 if (dwz_index_content
.empty ())
3092 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3093 1, dwz_index_content
, &dwz_map
,
3094 &dwz_list
, &dwz_list_elements
,
3096 &dwz_types_elements_ignore
))
3098 warning (_("could not read '.gdb_index' section from %s; skipping"),
3099 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3104 create_cus_from_index (dwarf2_per_objfile
->per_bfd
, cu_list
, cu_list_elements
,
3105 dwz_list
, dwz_list_elements
);
3107 if (types_list_elements
)
3109 /* We can only handle a single .debug_types when we have an
3111 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
3114 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
3116 create_signatured_type_table_from_index (dwarf2_per_objfile
->per_bfd
,
3117 section
, types_list
,
3118 types_list_elements
);
3121 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3123 dwarf2_per_objfile
->per_bfd
->index_table
= std::move (map
);
3124 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
3125 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
3126 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
3131 /* die_reader_func for dw2_get_file_names. */
3134 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3135 const gdb_byte
*info_ptr
,
3136 struct die_info
*comp_unit_die
)
3138 struct dwarf2_cu
*cu
= reader
->cu
;
3139 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3140 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
3141 struct dwarf2_per_cu_data
*lh_cu
;
3142 struct attribute
*attr
;
3144 struct quick_file_names
*qfn
;
3146 gdb_assert (! this_cu
->is_debug_types
);
3148 /* Our callers never want to match partial units -- instead they
3149 will match the enclosing full CU. */
3150 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3152 this_cu
->v
.quick
->no_file_data
= 1;
3160 sect_offset line_offset
{};
3162 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3163 if (attr
!= nullptr)
3165 struct quick_file_names find_entry
;
3167 line_offset
= (sect_offset
) DW_UNSND (attr
);
3169 /* We may have already read in this line header (TU line header sharing).
3170 If we have we're done. */
3171 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3172 find_entry
.hash
.line_sect_off
= line_offset
;
3173 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3174 &find_entry
, INSERT
);
3177 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3181 lh
= dwarf_decode_line_header (line_offset
, cu
);
3185 lh_cu
->v
.quick
->no_file_data
= 1;
3189 qfn
= XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct quick_file_names
);
3190 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3191 qfn
->hash
.line_sect_off
= line_offset
;
3192 gdb_assert (slot
!= NULL
);
3195 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3198 if (strcmp (fnd
.name
, "<unknown>") != 0)
3201 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3203 XOBNEWVEC (&dwarf2_per_objfile
->per_bfd
->obstack
, const char *,
3204 qfn
->num_file_names
);
3206 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3207 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3208 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3209 fnd
.comp_dir
).release ();
3210 qfn
->real_names
= NULL
;
3212 lh_cu
->v
.quick
->file_names
= qfn
;
3215 /* A helper for the "quick" functions which attempts to read the line
3216 table for THIS_CU. */
3218 static struct quick_file_names
*
3219 dw2_get_file_names (dwarf2_per_cu_data
*this_cu
,
3220 dwarf2_per_objfile
*per_objfile
)
3222 /* This should never be called for TUs. */
3223 gdb_assert (! this_cu
->is_debug_types
);
3224 /* Nor type unit groups. */
3225 gdb_assert (! this_cu
->type_unit_group_p ());
3227 if (this_cu
->v
.quick
->file_names
!= NULL
)
3228 return this_cu
->v
.quick
->file_names
;
3229 /* If we know there is no line data, no point in looking again. */
3230 if (this_cu
->v
.quick
->no_file_data
)
3233 cutu_reader
reader (this_cu
, per_objfile
);
3234 if (!reader
.dummy_p
)
3235 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3237 if (this_cu
->v
.quick
->no_file_data
)
3239 return this_cu
->v
.quick
->file_names
;
3242 /* A helper for the "quick" functions which computes and caches the
3243 real path for a given file name from the line table. */
3246 dw2_get_real_path (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3247 struct quick_file_names
*qfn
, int index
)
3249 if (qfn
->real_names
== NULL
)
3250 qfn
->real_names
= OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
3251 qfn
->num_file_names
, const char *);
3253 if (qfn
->real_names
[index
] == NULL
)
3254 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3256 return qfn
->real_names
[index
];
3259 static struct symtab
*
3260 dw2_find_last_source_symtab (struct objfile
*objfile
)
3262 struct dwarf2_per_objfile
*dwarf2_per_objfile
3263 = get_dwarf2_per_objfile (objfile
);
3264 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->per_bfd
->all_comp_units
.back ();
3265 compunit_symtab
*cust
3266 = dw2_instantiate_symtab (dwarf_cu
, dwarf2_per_objfile
, false);
3271 return compunit_primary_filetab (cust
);
3274 /* Traversal function for dw2_forget_cached_source_info. */
3277 dw2_free_cached_file_names (void **slot
, void *info
)
3279 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3281 if (file_data
->real_names
)
3285 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3287 xfree ((void*) file_data
->real_names
[i
]);
3288 file_data
->real_names
[i
] = NULL
;
3296 dw2_forget_cached_source_info (struct objfile
*objfile
)
3298 struct dwarf2_per_objfile
*dwarf2_per_objfile
3299 = get_dwarf2_per_objfile (objfile
);
3301 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3302 dw2_free_cached_file_names
, NULL
);
3305 /* Helper function for dw2_map_symtabs_matching_filename that expands
3306 the symtabs and calls the iterator. */
3309 dw2_map_expand_apply (struct objfile
*objfile
,
3310 struct dwarf2_per_cu_data
*per_cu
,
3311 const char *name
, const char *real_path
,
3312 gdb::function_view
<bool (symtab
*)> callback
)
3314 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3316 /* Don't visit already-expanded CUs. */
3317 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3318 if (per_objfile
->symtab_set_p (per_cu
))
3321 /* This may expand more than one symtab, and we want to iterate over
3323 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3325 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3326 last_made
, callback
);
3329 /* Implementation of the map_symtabs_matching_filename method. */
3332 dw2_map_symtabs_matching_filename
3333 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3334 gdb::function_view
<bool (symtab
*)> callback
)
3336 const char *name_basename
= lbasename (name
);
3337 struct dwarf2_per_objfile
*dwarf2_per_objfile
3338 = get_dwarf2_per_objfile (objfile
);
3340 /* The rule is CUs specify all the files, including those used by
3341 any TU, so there's no need to scan TUs here. */
3343 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3345 /* We only need to look at symtabs not already expanded. */
3346 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3349 quick_file_names
*file_data
3350 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
3351 if (file_data
== NULL
)
3354 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3356 const char *this_name
= file_data
->file_names
[j
];
3357 const char *this_real_name
;
3359 if (compare_filenames_for_search (this_name
, name
))
3361 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3367 /* Before we invoke realpath, which can get expensive when many
3368 files are involved, do a quick comparison of the basenames. */
3369 if (! basenames_may_differ
3370 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3373 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
3375 if (compare_filenames_for_search (this_real_name
, name
))
3377 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3383 if (real_path
!= NULL
)
3385 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3386 gdb_assert (IS_ABSOLUTE_PATH (name
));
3387 if (this_real_name
!= NULL
3388 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3390 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3402 /* Struct used to manage iterating over all CUs looking for a symbol. */
3404 struct dw2_symtab_iterator
3406 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3407 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3408 /* If set, only look for symbols that match that block. Valid values are
3409 GLOBAL_BLOCK and STATIC_BLOCK. */
3410 gdb::optional
<block_enum
> block_index
;
3411 /* The kind of symbol we're looking for. */
3413 /* The list of CUs from the index entry of the symbol,
3414 or NULL if not found. */
3416 /* The next element in VEC to look at. */
3418 /* The number of elements in VEC, or zero if there is no match. */
3420 /* Have we seen a global version of the symbol?
3421 If so we can ignore all further global instances.
3422 This is to work around gold/15646, inefficient gold-generated
3427 /* Initialize the index symtab iterator ITER. */
3430 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3431 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3432 gdb::optional
<block_enum
> block_index
,
3436 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3437 iter
->block_index
= block_index
;
3438 iter
->domain
= domain
;
3440 iter
->global_seen
= 0;
3442 mapped_index
*index
= dwarf2_per_objfile
->per_bfd
->index_table
.get ();
3444 /* index is NULL if OBJF_READNOW. */
3445 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3446 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3454 /* Return the next matching CU or NULL if there are no more. */
3456 static struct dwarf2_per_cu_data
*
3457 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3459 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3461 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3463 offset_type cu_index_and_attrs
=
3464 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3465 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3466 gdb_index_symbol_kind symbol_kind
=
3467 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3468 /* Only check the symbol attributes if they're present.
3469 Indices prior to version 7 don't record them,
3470 and indices >= 7 may elide them for certain symbols
3471 (gold does this). */
3473 (dwarf2_per_objfile
->per_bfd
->index_table
->version
>= 7
3474 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3476 /* Don't crash on bad data. */
3477 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3478 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
3480 complaint (_(".gdb_index entry has bad CU index"
3482 objfile_name (dwarf2_per_objfile
->objfile
));
3486 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
3488 /* Skip if already read in. */
3489 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3492 /* Check static vs global. */
3495 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3497 if (iter
->block_index
.has_value ())
3499 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3501 if (is_static
!= want_static
)
3505 /* Work around gold/15646. */
3506 if (!is_static
&& iter
->global_seen
)
3509 iter
->global_seen
= 1;
3512 /* Only check the symbol's kind if it has one. */
3515 switch (iter
->domain
)
3518 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3519 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3520 /* Some types are also in VAR_DOMAIN. */
3521 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3525 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3529 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3533 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3548 static struct compunit_symtab
*
3549 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3550 const char *name
, domain_enum domain
)
3552 struct compunit_symtab
*stab_best
= NULL
;
3553 struct dwarf2_per_objfile
*dwarf2_per_objfile
3554 = get_dwarf2_per_objfile (objfile
);
3556 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3558 struct dw2_symtab_iterator iter
;
3559 struct dwarf2_per_cu_data
*per_cu
;
3561 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3563 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3565 struct symbol
*sym
, *with_opaque
= NULL
;
3566 struct compunit_symtab
*stab
3567 = dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3568 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3569 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3571 sym
= block_find_symbol (block
, name
, domain
,
3572 block_find_non_opaque_type_preferred
,
3575 /* Some caution must be observed with overloaded functions
3576 and methods, since the index will not contain any overload
3577 information (but NAME might contain it). */
3580 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3582 if (with_opaque
!= NULL
3583 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3586 /* Keep looking through other CUs. */
3593 dw2_print_stats (struct objfile
*objfile
)
3595 struct dwarf2_per_objfile
*dwarf2_per_objfile
3596 = get_dwarf2_per_objfile (objfile
);
3597 int total
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3598 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3601 for (int i
= 0; i
< total
; ++i
)
3603 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3605 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
3608 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3609 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3612 /* This dumps minimal information about the index.
3613 It is called via "mt print objfiles".
3614 One use is to verify .gdb_index has been loaded by the
3615 gdb.dwarf2/gdb-index.exp testcase. */
3618 dw2_dump (struct objfile
*objfile
)
3620 struct dwarf2_per_objfile
*dwarf2_per_objfile
3621 = get_dwarf2_per_objfile (objfile
);
3623 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
3624 printf_filtered (".gdb_index:");
3625 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
)
3627 printf_filtered (" version %d\n",
3628 dwarf2_per_objfile
->per_bfd
->index_table
->version
);
3631 printf_filtered (" faked for \"readnow\"\n");
3632 printf_filtered ("\n");
3636 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3637 const char *func_name
)
3639 struct dwarf2_per_objfile
*dwarf2_per_objfile
3640 = get_dwarf2_per_objfile (objfile
);
3642 struct dw2_symtab_iterator iter
;
3643 struct dwarf2_per_cu_data
*per_cu
;
3645 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3647 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3648 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3653 dw2_expand_all_symtabs (struct objfile
*objfile
)
3655 struct dwarf2_per_objfile
*dwarf2_per_objfile
3656 = get_dwarf2_per_objfile (objfile
);
3657 int total_units
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3658 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3660 for (int i
= 0; i
< total_units
; ++i
)
3662 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3664 /* We don't want to directly expand a partial CU, because if we
3665 read it with the wrong language, then assertion failures can
3666 be triggered later on. See PR symtab/23010. So, tell
3667 dw2_instantiate_symtab to skip partial CUs -- any important
3668 partial CU will be read via DW_TAG_imported_unit anyway. */
3669 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, true);
3674 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3675 const char *fullname
)
3677 struct dwarf2_per_objfile
*dwarf2_per_objfile
3678 = get_dwarf2_per_objfile (objfile
);
3680 /* We don't need to consider type units here.
3681 This is only called for examining code, e.g. expand_line_sal.
3682 There can be an order of magnitude (or more) more type units
3683 than comp units, and we avoid them if we can. */
3685 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3687 /* We only need to look at symtabs not already expanded. */
3688 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3691 quick_file_names
*file_data
3692 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
3693 if (file_data
== NULL
)
3696 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3698 const char *this_fullname
= file_data
->file_names
[j
];
3700 if (filename_cmp (this_fullname
, fullname
) == 0)
3702 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3710 dw2_expand_symtabs_matching_symbol
3711 (mapped_index_base
&index
,
3712 const lookup_name_info
&lookup_name_in
,
3713 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3714 enum search_domain kind
,
3715 gdb::function_view
<bool (offset_type
)> match_callback
);
3718 dw2_expand_symtabs_matching_one
3719 (dwarf2_per_cu_data
*per_cu
,
3720 dwarf2_per_objfile
*per_objfile
,
3721 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3722 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3725 dw2_map_matching_symbols
3726 (struct objfile
*objfile
,
3727 const lookup_name_info
&name
, domain_enum domain
,
3729 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3730 symbol_compare_ftype
*ordered_compare
)
3733 struct dwarf2_per_objfile
*dwarf2_per_objfile
3734 = get_dwarf2_per_objfile (objfile
);
3736 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3738 if (dwarf2_per_objfile
->per_bfd
->index_table
!= nullptr)
3740 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3741 here though if the current language is Ada for a non-Ada objfile
3743 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
3745 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3746 auto matcher
= [&] (const char *symname
)
3748 if (ordered_compare
== nullptr)
3750 return ordered_compare (symname
, match_name
) == 0;
3753 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3754 [&] (offset_type namei
)
3756 struct dw2_symtab_iterator iter
;
3757 struct dwarf2_per_cu_data
*per_cu
;
3759 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_kind
, domain
,
3761 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3762 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, nullptr,
3769 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3770 proceed assuming all symtabs have been read in. */
3773 for (compunit_symtab
*cust
: objfile
->compunits ())
3775 const struct block
*block
;
3779 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3780 if (!iterate_over_symbols_terminated (block
, name
,
3786 /* Starting from a search name, return the string that finds the upper
3787 bound of all strings that start with SEARCH_NAME in a sorted name
3788 list. Returns the empty string to indicate that the upper bound is
3789 the end of the list. */
3792 make_sort_after_prefix_name (const char *search_name
)
3794 /* When looking to complete "func", we find the upper bound of all
3795 symbols that start with "func" by looking for where we'd insert
3796 the closest string that would follow "func" in lexicographical
3797 order. Usually, that's "func"-with-last-character-incremented,
3798 i.e. "fund". Mind non-ASCII characters, though. Usually those
3799 will be UTF-8 multi-byte sequences, but we can't be certain.
3800 Especially mind the 0xff character, which is a valid character in
3801 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3802 rule out compilers allowing it in identifiers. Note that
3803 conveniently, strcmp/strcasecmp are specified to compare
3804 characters interpreted as unsigned char. So what we do is treat
3805 the whole string as a base 256 number composed of a sequence of
3806 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3807 to 0, and carries 1 to the following more-significant position.
3808 If the very first character in SEARCH_NAME ends up incremented
3809 and carries/overflows, then the upper bound is the end of the
3810 list. The string after the empty string is also the empty
3813 Some examples of this operation:
3815 SEARCH_NAME => "+1" RESULT
3819 "\xff" "a" "\xff" => "\xff" "b"
3824 Then, with these symbols for example:
3830 completing "func" looks for symbols between "func" and
3831 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3832 which finds "func" and "func1", but not "fund".
3836 funcÿ (Latin1 'ÿ' [0xff])
3840 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3841 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3845 ÿÿ (Latin1 'ÿ' [0xff])
3848 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3849 the end of the list.
3851 std::string after
= search_name
;
3852 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3854 if (!after
.empty ())
3855 after
.back () = (unsigned char) after
.back () + 1;
3859 /* See declaration. */
3861 std::pair
<std::vector
<name_component
>::const_iterator
,
3862 std::vector
<name_component
>::const_iterator
>
3863 mapped_index_base::find_name_components_bounds
3864 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3867 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3869 const char *lang_name
3870 = lookup_name_without_params
.language_lookup_name (lang
);
3872 /* Comparison function object for lower_bound that matches against a
3873 given symbol name. */
3874 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3877 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3878 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3879 return name_cmp (elem_name
, name
) < 0;
3882 /* Comparison function object for upper_bound that matches against a
3883 given symbol name. */
3884 auto lookup_compare_upper
= [&] (const char *name
,
3885 const name_component
&elem
)
3887 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3888 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3889 return name_cmp (name
, elem_name
) < 0;
3892 auto begin
= this->name_components
.begin ();
3893 auto end
= this->name_components
.end ();
3895 /* Find the lower bound. */
3898 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3901 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3904 /* Find the upper bound. */
3907 if (lookup_name_without_params
.completion_mode ())
3909 /* In completion mode, we want UPPER to point past all
3910 symbols names that have the same prefix. I.e., with
3911 these symbols, and completing "func":
3913 function << lower bound
3915 other_function << upper bound
3917 We find the upper bound by looking for the insertion
3918 point of "func"-with-last-character-incremented,
3920 std::string after
= make_sort_after_prefix_name (lang_name
);
3923 return std::lower_bound (lower
, end
, after
.c_str (),
3924 lookup_compare_lower
);
3927 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3930 return {lower
, upper
};
3933 /* See declaration. */
3936 mapped_index_base::build_name_components ()
3938 if (!this->name_components
.empty ())
3941 this->name_components_casing
= case_sensitivity
;
3943 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3945 /* The code below only knows how to break apart components of C++
3946 symbol names (and other languages that use '::' as
3947 namespace/module separator) and Ada symbol names. */
3948 auto count
= this->symbol_name_count ();
3949 for (offset_type idx
= 0; idx
< count
; idx
++)
3951 if (this->symbol_name_slot_invalid (idx
))
3954 const char *name
= this->symbol_name_at (idx
);
3956 /* Add each name component to the name component table. */
3957 unsigned int previous_len
= 0;
3959 if (strstr (name
, "::") != nullptr)
3961 for (unsigned int current_len
= cp_find_first_component (name
);
3962 name
[current_len
] != '\0';
3963 current_len
+= cp_find_first_component (name
+ current_len
))
3965 gdb_assert (name
[current_len
] == ':');
3966 this->name_components
.push_back ({previous_len
, idx
});
3967 /* Skip the '::'. */
3969 previous_len
= current_len
;
3974 /* Handle the Ada encoded (aka mangled) form here. */
3975 for (const char *iter
= strstr (name
, "__");
3977 iter
= strstr (iter
, "__"))
3979 this->name_components
.push_back ({previous_len
, idx
});
3981 previous_len
= iter
- name
;
3985 this->name_components
.push_back ({previous_len
, idx
});
3988 /* Sort name_components elements by name. */
3989 auto name_comp_compare
= [&] (const name_component
&left
,
3990 const name_component
&right
)
3992 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3993 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3995 const char *left_name
= left_qualified
+ left
.name_offset
;
3996 const char *right_name
= right_qualified
+ right
.name_offset
;
3998 return name_cmp (left_name
, right_name
) < 0;
4001 std::sort (this->name_components
.begin (),
4002 this->name_components
.end (),
4006 /* Helper for dw2_expand_symtabs_matching that works with a
4007 mapped_index_base instead of the containing objfile. This is split
4008 to a separate function in order to be able to unit test the
4009 name_components matching using a mock mapped_index_base. For each
4010 symbol name that matches, calls MATCH_CALLBACK, passing it the
4011 symbol's index in the mapped_index_base symbol table. */
4014 dw2_expand_symtabs_matching_symbol
4015 (mapped_index_base
&index
,
4016 const lookup_name_info
&lookup_name_in
,
4017 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4018 enum search_domain kind
,
4019 gdb::function_view
<bool (offset_type
)> match_callback
)
4021 lookup_name_info lookup_name_without_params
4022 = lookup_name_in
.make_ignore_params ();
4024 /* Build the symbol name component sorted vector, if we haven't
4026 index
.build_name_components ();
4028 /* The same symbol may appear more than once in the range though.
4029 E.g., if we're looking for symbols that complete "w", and we have
4030 a symbol named "w1::w2", we'll find the two name components for
4031 that same symbol in the range. To be sure we only call the
4032 callback once per symbol, we first collect the symbol name
4033 indexes that matched in a temporary vector and ignore
4035 std::vector
<offset_type
> matches
;
4037 struct name_and_matcher
4039 symbol_name_matcher_ftype
*matcher
;
4042 bool operator== (const name_and_matcher
&other
) const
4044 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
4048 /* A vector holding all the different symbol name matchers, for all
4050 std::vector
<name_and_matcher
> matchers
;
4052 for (int i
= 0; i
< nr_languages
; i
++)
4054 enum language lang_e
= (enum language
) i
;
4056 const language_defn
*lang
= language_def (lang_e
);
4057 symbol_name_matcher_ftype
*name_matcher
4058 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4060 name_and_matcher key
{
4062 lookup_name_without_params
.language_lookup_name (lang_e
)
4065 /* Don't insert the same comparison routine more than once.
4066 Note that we do this linear walk. This is not a problem in
4067 practice because the number of supported languages is
4069 if (std::find (matchers
.begin (), matchers
.end (), key
)
4072 matchers
.push_back (std::move (key
));
4075 = index
.find_name_components_bounds (lookup_name_without_params
,
4078 /* Now for each symbol name in range, check to see if we have a name
4079 match, and if so, call the MATCH_CALLBACK callback. */
4081 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4083 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4085 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4086 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4089 matches
.push_back (bounds
.first
->idx
);
4093 std::sort (matches
.begin (), matches
.end ());
4095 /* Finally call the callback, once per match. */
4097 for (offset_type idx
: matches
)
4101 if (!match_callback (idx
))
4107 /* Above we use a type wider than idx's for 'prev', since 0 and
4108 (offset_type)-1 are both possible values. */
4109 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4114 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4116 /* A mock .gdb_index/.debug_names-like name index table, enough to
4117 exercise dw2_expand_symtabs_matching_symbol, which works with the
4118 mapped_index_base interface. Builds an index from the symbol list
4119 passed as parameter to the constructor. */
4120 class mock_mapped_index
: public mapped_index_base
4123 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4124 : m_symbol_table (symbols
)
4127 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4129 /* Return the number of names in the symbol table. */
4130 size_t symbol_name_count () const override
4132 return m_symbol_table
.size ();
4135 /* Get the name of the symbol at IDX in the symbol table. */
4136 const char *symbol_name_at (offset_type idx
) const override
4138 return m_symbol_table
[idx
];
4142 gdb::array_view
<const char *> m_symbol_table
;
4145 /* Convenience function that converts a NULL pointer to a "<null>"
4146 string, to pass to print routines. */
4149 string_or_null (const char *str
)
4151 return str
!= NULL
? str
: "<null>";
4154 /* Check if a lookup_name_info built from
4155 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4156 index. EXPECTED_LIST is the list of expected matches, in expected
4157 matching order. If no match expected, then an empty list is
4158 specified. Returns true on success. On failure prints a warning
4159 indicating the file:line that failed, and returns false. */
4162 check_match (const char *file
, int line
,
4163 mock_mapped_index
&mock_index
,
4164 const char *name
, symbol_name_match_type match_type
,
4165 bool completion_mode
,
4166 std::initializer_list
<const char *> expected_list
)
4168 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4170 bool matched
= true;
4172 auto mismatch
= [&] (const char *expected_str
,
4175 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4176 "expected=\"%s\", got=\"%s\"\n"),
4178 (match_type
== symbol_name_match_type::FULL
4180 name
, string_or_null (expected_str
), string_or_null (got
));
4184 auto expected_it
= expected_list
.begin ();
4185 auto expected_end
= expected_list
.end ();
4187 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4189 [&] (offset_type idx
)
4191 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4192 const char *expected_str
4193 = expected_it
== expected_end
? NULL
: *expected_it
++;
4195 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4196 mismatch (expected_str
, matched_name
);
4200 const char *expected_str
4201 = expected_it
== expected_end
? NULL
: *expected_it
++;
4202 if (expected_str
!= NULL
)
4203 mismatch (expected_str
, NULL
);
4208 /* The symbols added to the mock mapped_index for testing (in
4210 static const char *test_symbols
[] = {
4219 "ns2::tmpl<int>::foo2",
4220 "(anonymous namespace)::A::B::C",
4222 /* These are used to check that the increment-last-char in the
4223 matching algorithm for completion doesn't match "t1_fund" when
4224 completing "t1_func". */
4230 /* A UTF-8 name with multi-byte sequences to make sure that
4231 cp-name-parser understands this as a single identifier ("função"
4232 is "function" in PT). */
4235 /* \377 (0xff) is Latin1 'ÿ'. */
4238 /* \377 (0xff) is Latin1 'ÿ'. */
4242 /* A name with all sorts of complications. Starts with "z" to make
4243 it easier for the completion tests below. */
4244 #define Z_SYM_NAME \
4245 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4246 "::tuple<(anonymous namespace)::ui*, " \
4247 "std::default_delete<(anonymous namespace)::ui>, void>"
4252 /* Returns true if the mapped_index_base::find_name_component_bounds
4253 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4254 in completion mode. */
4257 check_find_bounds_finds (mapped_index_base
&index
,
4258 const char *search_name
,
4259 gdb::array_view
<const char *> expected_syms
)
4261 lookup_name_info
lookup_name (search_name
,
4262 symbol_name_match_type::FULL
, true);
4264 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4267 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4268 if (distance
!= expected_syms
.size ())
4271 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4273 auto nc_elem
= bounds
.first
+ exp_elem
;
4274 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4275 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4282 /* Test the lower-level mapped_index::find_name_component_bounds
4286 test_mapped_index_find_name_component_bounds ()
4288 mock_mapped_index
mock_index (test_symbols
);
4290 mock_index
.build_name_components ();
4292 /* Test the lower-level mapped_index::find_name_component_bounds
4293 method in completion mode. */
4295 static const char *expected_syms
[] = {
4300 SELF_CHECK (check_find_bounds_finds (mock_index
,
4301 "t1_func", expected_syms
));
4304 /* Check that the increment-last-char in the name matching algorithm
4305 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4307 static const char *expected_syms1
[] = {
4311 SELF_CHECK (check_find_bounds_finds (mock_index
,
4312 "\377", expected_syms1
));
4314 static const char *expected_syms2
[] = {
4317 SELF_CHECK (check_find_bounds_finds (mock_index
,
4318 "\377\377", expected_syms2
));
4322 /* Test dw2_expand_symtabs_matching_symbol. */
4325 test_dw2_expand_symtabs_matching_symbol ()
4327 mock_mapped_index
mock_index (test_symbols
);
4329 /* We let all tests run until the end even if some fails, for debug
4331 bool any_mismatch
= false;
4333 /* Create the expected symbols list (an initializer_list). Needed
4334 because lists have commas, and we need to pass them to CHECK,
4335 which is a macro. */
4336 #define EXPECT(...) { __VA_ARGS__ }
4338 /* Wrapper for check_match that passes down the current
4339 __FILE__/__LINE__. */
4340 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4341 any_mismatch |= !check_match (__FILE__, __LINE__, \
4343 NAME, MATCH_TYPE, COMPLETION_MODE, \
4346 /* Identity checks. */
4347 for (const char *sym
: test_symbols
)
4349 /* Should be able to match all existing symbols. */
4350 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4353 /* Should be able to match all existing symbols with
4355 std::string with_params
= std::string (sym
) + "(int)";
4356 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4359 /* Should be able to match all existing symbols with
4360 parameters and qualifiers. */
4361 with_params
= std::string (sym
) + " ( int ) const";
4362 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4365 /* This should really find sym, but cp-name-parser.y doesn't
4366 know about lvalue/rvalue qualifiers yet. */
4367 with_params
= std::string (sym
) + " ( int ) &&";
4368 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4372 /* Check that the name matching algorithm for completion doesn't get
4373 confused with Latin1 'ÿ' / 0xff. */
4375 static const char str
[] = "\377";
4376 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4377 EXPECT ("\377", "\377\377123"));
4380 /* Check that the increment-last-char in the matching algorithm for
4381 completion doesn't match "t1_fund" when completing "t1_func". */
4383 static const char str
[] = "t1_func";
4384 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4385 EXPECT ("t1_func", "t1_func1"));
4388 /* Check that completion mode works at each prefix of the expected
4391 static const char str
[] = "function(int)";
4392 size_t len
= strlen (str
);
4395 for (size_t i
= 1; i
< len
; i
++)
4397 lookup
.assign (str
, i
);
4398 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4399 EXPECT ("function"));
4403 /* While "w" is a prefix of both components, the match function
4404 should still only be called once. */
4406 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4408 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4412 /* Same, with a "complicated" symbol. */
4414 static const char str
[] = Z_SYM_NAME
;
4415 size_t len
= strlen (str
);
4418 for (size_t i
= 1; i
< len
; i
++)
4420 lookup
.assign (str
, i
);
4421 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4422 EXPECT (Z_SYM_NAME
));
4426 /* In FULL mode, an incomplete symbol doesn't match. */
4428 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4432 /* A complete symbol with parameters matches any overload, since the
4433 index has no overload info. */
4435 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4436 EXPECT ("std::zfunction", "std::zfunction2"));
4437 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4438 EXPECT ("std::zfunction", "std::zfunction2"));
4439 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4440 EXPECT ("std::zfunction", "std::zfunction2"));
4443 /* Check that whitespace is ignored appropriately. A symbol with a
4444 template argument list. */
4446 static const char expected
[] = "ns::foo<int>";
4447 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4449 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4453 /* Check that whitespace is ignored appropriately. A symbol with a
4454 template argument list that includes a pointer. */
4456 static const char expected
[] = "ns::foo<char*>";
4457 /* Try both completion and non-completion modes. */
4458 static const bool completion_mode
[2] = {false, true};
4459 for (size_t i
= 0; i
< 2; i
++)
4461 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4462 completion_mode
[i
], EXPECT (expected
));
4463 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4464 completion_mode
[i
], EXPECT (expected
));
4466 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4467 completion_mode
[i
], EXPECT (expected
));
4468 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4469 completion_mode
[i
], EXPECT (expected
));
4474 /* Check method qualifiers are ignored. */
4475 static const char expected
[] = "ns::foo<char*>";
4476 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4477 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4478 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4479 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4480 CHECK_MATCH ("foo < char * > ( int ) const",
4481 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4482 CHECK_MATCH ("foo < char * > ( int ) &&",
4483 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4486 /* Test lookup names that don't match anything. */
4488 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4491 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4495 /* Some wild matching tests, exercising "(anonymous namespace)",
4496 which should not be confused with a parameter list. */
4498 static const char *syms
[] = {
4502 "A :: B :: C ( int )",
4507 for (const char *s
: syms
)
4509 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4510 EXPECT ("(anonymous namespace)::A::B::C"));
4515 static const char expected
[] = "ns2::tmpl<int>::foo2";
4516 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4518 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4522 SELF_CHECK (!any_mismatch
);
4531 test_mapped_index_find_name_component_bounds ();
4532 test_dw2_expand_symtabs_matching_symbol ();
4535 }} // namespace selftests::dw2_expand_symtabs_matching
4537 #endif /* GDB_SELF_TEST */
4539 /* If FILE_MATCHER is NULL or if PER_CU has
4540 dwarf2_per_cu_quick_data::MARK set (see
4541 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4542 EXPANSION_NOTIFY on it. */
4545 dw2_expand_symtabs_matching_one
4546 (dwarf2_per_cu_data
*per_cu
,
4547 dwarf2_per_objfile
*per_objfile
,
4548 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4549 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4551 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4553 bool symtab_was_null
= !per_objfile
->symtab_set_p (per_cu
);
4555 compunit_symtab
*symtab
4556 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
4557 gdb_assert (symtab
!= nullptr);
4559 if (expansion_notify
!= NULL
&& symtab_was_null
)
4560 expansion_notify (symtab
);
4564 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4565 matched, to expand corresponding CUs that were marked. IDX is the
4566 index of the symbol name that matched. */
4569 dw2_expand_marked_cus
4570 (dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4571 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4572 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4575 offset_type
*vec
, vec_len
, vec_idx
;
4576 bool global_seen
= false;
4577 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4579 vec
= (offset_type
*) (index
.constant_pool
4580 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4581 vec_len
= MAYBE_SWAP (vec
[0]);
4582 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4584 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4585 /* This value is only valid for index versions >= 7. */
4586 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4587 gdb_index_symbol_kind symbol_kind
=
4588 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4589 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4590 /* Only check the symbol attributes if they're present.
4591 Indices prior to version 7 don't record them,
4592 and indices >= 7 may elide them for certain symbols
4593 (gold does this). */
4596 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4598 /* Work around gold/15646. */
4601 if (!is_static
&& global_seen
)
4607 /* Only check the symbol's kind if it has one. */
4612 case VARIABLES_DOMAIN
:
4613 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4616 case FUNCTIONS_DOMAIN
:
4617 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4621 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4624 case MODULES_DOMAIN
:
4625 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4633 /* Don't crash on bad data. */
4634 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
4635 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
4637 complaint (_(".gdb_index entry has bad CU index"
4639 objfile_name (dwarf2_per_objfile
->objfile
));
4643 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
4644 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, file_matcher
,
4649 /* If FILE_MATCHER is non-NULL, set all the
4650 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4651 that match FILE_MATCHER. */
4654 dw_expand_symtabs_matching_file_matcher
4655 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4656 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4658 if (file_matcher
== NULL
)
4661 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4663 NULL
, xcalloc
, xfree
));
4664 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4666 NULL
, xcalloc
, xfree
));
4668 /* The rule is CUs specify all the files, including those used by
4669 any TU, so there's no need to scan TUs here. */
4671 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4675 per_cu
->v
.quick
->mark
= 0;
4677 /* We only need to look at symtabs not already expanded. */
4678 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4681 quick_file_names
*file_data
4682 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
4683 if (file_data
== NULL
)
4686 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4688 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4690 per_cu
->v
.quick
->mark
= 1;
4694 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4696 const char *this_real_name
;
4698 if (file_matcher (file_data
->file_names
[j
], false))
4700 per_cu
->v
.quick
->mark
= 1;
4704 /* Before we invoke realpath, which can get expensive when many
4705 files are involved, do a quick comparison of the basenames. */
4706 if (!basenames_may_differ
4707 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4711 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
4713 if (file_matcher (this_real_name
, false))
4715 per_cu
->v
.quick
->mark
= 1;
4720 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4721 ? visited_found
.get ()
4722 : visited_not_found
.get (),
4729 dw2_expand_symtabs_matching
4730 (struct objfile
*objfile
,
4731 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4732 const lookup_name_info
*lookup_name
,
4733 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4734 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4735 enum search_domain kind
)
4737 struct dwarf2_per_objfile
*dwarf2_per_objfile
4738 = get_dwarf2_per_objfile (objfile
);
4740 /* index_table is NULL if OBJF_READNOW. */
4741 if (!dwarf2_per_objfile
->per_bfd
->index_table
)
4744 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4746 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4748 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4752 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
4753 file_matcher
, expansion_notify
);
4758 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4760 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4762 kind
, [&] (offset_type idx
)
4764 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4765 expansion_notify
, kind
);
4770 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4773 static struct compunit_symtab
*
4774 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4779 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4780 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4783 if (cust
->includes
== NULL
)
4786 for (i
= 0; cust
->includes
[i
]; ++i
)
4788 struct compunit_symtab
*s
= cust
->includes
[i
];
4790 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4798 static struct compunit_symtab
*
4799 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4800 struct bound_minimal_symbol msymbol
,
4802 struct obj_section
*section
,
4805 struct dwarf2_per_cu_data
*data
;
4806 struct compunit_symtab
*result
;
4808 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4811 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4812 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4813 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4817 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4818 if (warn_if_readin
&& per_objfile
->symtab_set_p (data
))
4819 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4820 paddress (objfile
->arch (), pc
));
4822 result
= recursively_find_pc_sect_compunit_symtab
4823 (dw2_instantiate_symtab (data
, per_objfile
, false), pc
);
4825 gdb_assert (result
!= NULL
);
4830 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4831 void *data
, int need_fullname
)
4833 struct dwarf2_per_objfile
*dwarf2_per_objfile
4834 = get_dwarf2_per_objfile (objfile
);
4836 if (!dwarf2_per_objfile
->per_bfd
->filenames_cache
)
4838 dwarf2_per_objfile
->per_bfd
->filenames_cache
.emplace ();
4840 htab_up
visited (htab_create_alloc (10,
4841 htab_hash_pointer
, htab_eq_pointer
,
4842 NULL
, xcalloc
, xfree
));
4844 /* The rule is CUs specify all the files, including those used
4845 by any TU, so there's no need to scan TUs here. We can
4846 ignore file names coming from already-expanded CUs. */
4848 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4850 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4852 void **slot
= htab_find_slot (visited
.get (),
4853 per_cu
->v
.quick
->file_names
,
4856 *slot
= per_cu
->v
.quick
->file_names
;
4860 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4862 /* We only need to look at symtabs not already expanded. */
4863 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4866 quick_file_names
*file_data
4867 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
4868 if (file_data
== NULL
)
4871 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4874 /* Already visited. */
4879 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4881 const char *filename
= file_data
->file_names
[j
];
4882 dwarf2_per_objfile
->per_bfd
->filenames_cache
->seen (filename
);
4887 dwarf2_per_objfile
->per_bfd
->filenames_cache
->traverse ([&] (const char *filename
)
4889 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4892 this_real_name
= gdb_realpath (filename
);
4893 (*fun
) (filename
, this_real_name
.get (), data
);
4898 dw2_has_symbols (struct objfile
*objfile
)
4903 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4906 dw2_find_last_source_symtab
,
4907 dw2_forget_cached_source_info
,
4908 dw2_map_symtabs_matching_filename
,
4913 dw2_expand_symtabs_for_function
,
4914 dw2_expand_all_symtabs
,
4915 dw2_expand_symtabs_with_fullname
,
4916 dw2_map_matching_symbols
,
4917 dw2_expand_symtabs_matching
,
4918 dw2_find_pc_sect_compunit_symtab
,
4920 dw2_map_symbol_filenames
4923 /* DWARF-5 debug_names reader. */
4925 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4926 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4928 /* A helper function that reads the .debug_names section in SECTION
4929 and fills in MAP. FILENAME is the name of the file containing the
4930 section; it is used for error reporting.
4932 Returns true if all went well, false otherwise. */
4935 read_debug_names_from_section (struct objfile
*objfile
,
4936 const char *filename
,
4937 struct dwarf2_section_info
*section
,
4938 mapped_debug_names
&map
)
4940 if (section
->empty ())
4943 /* Older elfutils strip versions could keep the section in the main
4944 executable while splitting it for the separate debug info file. */
4945 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4948 section
->read (objfile
);
4950 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4952 const gdb_byte
*addr
= section
->buffer
;
4954 bfd
*const abfd
= section
->get_bfd_owner ();
4956 unsigned int bytes_read
;
4957 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4960 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4961 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4962 if (bytes_read
+ length
!= section
->size
)
4964 /* There may be multiple per-CU indices. */
4965 warning (_("Section .debug_names in %s length %s does not match "
4966 "section length %s, ignoring .debug_names."),
4967 filename
, plongest (bytes_read
+ length
),
4968 pulongest (section
->size
));
4972 /* The version number. */
4973 uint16_t version
= read_2_bytes (abfd
, addr
);
4977 warning (_("Section .debug_names in %s has unsupported version %d, "
4978 "ignoring .debug_names."),
4984 uint16_t padding
= read_2_bytes (abfd
, addr
);
4988 warning (_("Section .debug_names in %s has unsupported padding %d, "
4989 "ignoring .debug_names."),
4994 /* comp_unit_count - The number of CUs in the CU list. */
4995 map
.cu_count
= read_4_bytes (abfd
, addr
);
4998 /* local_type_unit_count - The number of TUs in the local TU
5000 map
.tu_count
= read_4_bytes (abfd
, addr
);
5003 /* foreign_type_unit_count - The number of TUs in the foreign TU
5005 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5007 if (foreign_tu_count
!= 0)
5009 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5010 "ignoring .debug_names."),
5011 filename
, static_cast<unsigned long> (foreign_tu_count
));
5015 /* bucket_count - The number of hash buckets in the hash lookup
5017 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5020 /* name_count - The number of unique names in the index. */
5021 map
.name_count
= read_4_bytes (abfd
, addr
);
5024 /* abbrev_table_size - The size in bytes of the abbreviations
5026 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5029 /* augmentation_string_size - The size in bytes of the augmentation
5030 string. This value is rounded up to a multiple of 4. */
5031 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5033 map
.augmentation_is_gdb
= ((augmentation_string_size
5034 == sizeof (dwarf5_augmentation
))
5035 && memcmp (addr
, dwarf5_augmentation
,
5036 sizeof (dwarf5_augmentation
)) == 0);
5037 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5038 addr
+= augmentation_string_size
;
5041 map
.cu_table_reordered
= addr
;
5042 addr
+= map
.cu_count
* map
.offset_size
;
5044 /* List of Local TUs */
5045 map
.tu_table_reordered
= addr
;
5046 addr
+= map
.tu_count
* map
.offset_size
;
5048 /* Hash Lookup Table */
5049 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5050 addr
+= map
.bucket_count
* 4;
5051 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5052 addr
+= map
.name_count
* 4;
5055 map
.name_table_string_offs_reordered
= addr
;
5056 addr
+= map
.name_count
* map
.offset_size
;
5057 map
.name_table_entry_offs_reordered
= addr
;
5058 addr
+= map
.name_count
* map
.offset_size
;
5060 const gdb_byte
*abbrev_table_start
= addr
;
5063 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5068 const auto insertpair
5069 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5070 if (!insertpair
.second
)
5072 warning (_("Section .debug_names in %s has duplicate index %s, "
5073 "ignoring .debug_names."),
5074 filename
, pulongest (index_num
));
5077 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5078 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5083 mapped_debug_names::index_val::attr attr
;
5084 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5086 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5088 if (attr
.form
== DW_FORM_implicit_const
)
5090 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5094 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5096 indexval
.attr_vec
.push_back (std::move (attr
));
5099 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5101 warning (_("Section .debug_names in %s has abbreviation_table "
5102 "of size %s vs. written as %u, ignoring .debug_names."),
5103 filename
, plongest (addr
- abbrev_table_start
),
5107 map
.entry_pool
= addr
;
5112 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5116 create_cus_from_debug_names_list (dwarf2_per_bfd
*per_bfd
,
5117 const mapped_debug_names
&map
,
5118 dwarf2_section_info
§ion
,
5121 if (!map
.augmentation_is_gdb
)
5123 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5125 sect_offset sect_off
5126 = (sect_offset
) (extract_unsigned_integer
5127 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5129 map
.dwarf5_byte_order
));
5130 /* We don't know the length of the CU, because the CU list in a
5131 .debug_names index can be incomplete, so we can't use the start of
5132 the next CU as end of this CU. We create the CUs here with length 0,
5133 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5134 dwarf2_per_cu_data
*per_cu
5135 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
, sect_off
, 0);
5136 per_bfd
->all_comp_units
.push_back (per_cu
);
5140 sect_offset sect_off_prev
;
5141 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5143 sect_offset sect_off_next
;
5144 if (i
< map
.cu_count
)
5147 = (sect_offset
) (extract_unsigned_integer
5148 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5150 map
.dwarf5_byte_order
));
5153 sect_off_next
= (sect_offset
) section
.size
;
5156 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5157 dwarf2_per_cu_data
*per_cu
5158 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
,
5159 sect_off_prev
, length
);
5160 per_bfd
->all_comp_units
.push_back (per_cu
);
5162 sect_off_prev
= sect_off_next
;
5166 /* Read the CU list from the mapped index, and use it to create all
5167 the CU objects for this dwarf2_per_objfile. */
5170 create_cus_from_debug_names (dwarf2_per_bfd
*per_bfd
,
5171 const mapped_debug_names
&map
,
5172 const mapped_debug_names
&dwz_map
)
5174 gdb_assert (per_bfd
->all_comp_units
.empty ());
5175 per_bfd
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5177 create_cus_from_debug_names_list (per_bfd
, map
, per_bfd
->info
,
5178 false /* is_dwz */);
5180 if (dwz_map
.cu_count
== 0)
5183 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
5184 create_cus_from_debug_names_list (per_bfd
, dwz_map
, dwz
->info
,
5188 /* Read .debug_names. If everything went ok, initialize the "quick"
5189 elements of all the CUs and return true. Otherwise, return false. */
5192 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5194 std::unique_ptr
<mapped_debug_names
> map
5195 (new mapped_debug_names (dwarf2_per_objfile
));
5196 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5197 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5199 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5200 &dwarf2_per_objfile
->per_bfd
->debug_names
,
5204 /* Don't use the index if it's empty. */
5205 if (map
->name_count
== 0)
5208 /* If there is a .dwz file, read it so we can get its CU list as
5210 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
5213 if (!read_debug_names_from_section (objfile
,
5214 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5215 &dwz
->debug_names
, dwz_map
))
5217 warning (_("could not read '.debug_names' section from %s; skipping"),
5218 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5223 create_cus_from_debug_names (dwarf2_per_objfile
->per_bfd
, *map
, dwz_map
);
5225 if (map
->tu_count
!= 0)
5227 /* We can only handle a single .debug_types when we have an
5229 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
5232 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
5234 create_signatured_type_table_from_debug_names
5235 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->per_bfd
->abbrev
);
5238 create_addrmap_from_aranges (dwarf2_per_objfile
,
5239 &dwarf2_per_objfile
->per_bfd
->debug_aranges
);
5241 dwarf2_per_objfile
->per_bfd
->debug_names_table
= std::move (map
);
5242 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5243 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
5244 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5249 /* Type used to manage iterating over all CUs looking for a symbol for
5252 class dw2_debug_names_iterator
5255 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5256 gdb::optional
<block_enum
> block_index
,
5259 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5260 m_addr (find_vec_in_debug_names (map
, name
))
5263 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5264 search_domain search
, uint32_t namei
)
5267 m_addr (find_vec_in_debug_names (map
, namei
))
5270 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5271 block_enum block_index
, domain_enum domain
,
5273 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5274 m_addr (find_vec_in_debug_names (map
, namei
))
5277 /* Return the next matching CU or NULL if there are no more. */
5278 dwarf2_per_cu_data
*next ();
5281 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5283 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5286 /* The internalized form of .debug_names. */
5287 const mapped_debug_names
&m_map
;
5289 /* If set, only look for symbols that match that block. Valid values are
5290 GLOBAL_BLOCK and STATIC_BLOCK. */
5291 const gdb::optional
<block_enum
> m_block_index
;
5293 /* The kind of symbol we're looking for. */
5294 const domain_enum m_domain
= UNDEF_DOMAIN
;
5295 const search_domain m_search
= ALL_DOMAIN
;
5297 /* The list of CUs from the index entry of the symbol, or NULL if
5299 const gdb_byte
*m_addr
;
5303 mapped_debug_names::namei_to_name (uint32_t namei
) const
5305 const ULONGEST namei_string_offs
5306 = extract_unsigned_integer ((name_table_string_offs_reordered
5307 + namei
* offset_size
),
5310 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5314 /* Find a slot in .debug_names for the object named NAME. If NAME is
5315 found, return pointer to its pool data. If NAME cannot be found,
5319 dw2_debug_names_iterator::find_vec_in_debug_names
5320 (const mapped_debug_names
&map
, const char *name
)
5322 int (*cmp
) (const char *, const char *);
5324 gdb::unique_xmalloc_ptr
<char> without_params
;
5325 if (current_language
->la_language
== language_cplus
5326 || current_language
->la_language
== language_fortran
5327 || current_language
->la_language
== language_d
)
5329 /* NAME is already canonical. Drop any qualifiers as
5330 .debug_names does not contain any. */
5332 if (strchr (name
, '(') != NULL
)
5334 without_params
= cp_remove_params (name
);
5335 if (without_params
!= NULL
)
5336 name
= without_params
.get ();
5340 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5342 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5344 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5345 (map
.bucket_table_reordered
5346 + (full_hash
% map
.bucket_count
)), 4,
5347 map
.dwarf5_byte_order
);
5351 if (namei
>= map
.name_count
)
5353 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5355 namei
, map
.name_count
,
5356 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5362 const uint32_t namei_full_hash
5363 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5364 (map
.hash_table_reordered
+ namei
), 4,
5365 map
.dwarf5_byte_order
);
5366 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5369 if (full_hash
== namei_full_hash
)
5371 const char *const namei_string
= map
.namei_to_name (namei
);
5373 #if 0 /* An expensive sanity check. */
5374 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5376 complaint (_("Wrong .debug_names hash for string at index %u "
5378 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5383 if (cmp (namei_string
, name
) == 0)
5385 const ULONGEST namei_entry_offs
5386 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5387 + namei
* map
.offset_size
),
5388 map
.offset_size
, map
.dwarf5_byte_order
);
5389 return map
.entry_pool
+ namei_entry_offs
;
5394 if (namei
>= map
.name_count
)
5400 dw2_debug_names_iterator::find_vec_in_debug_names
5401 (const mapped_debug_names
&map
, uint32_t namei
)
5403 if (namei
>= map
.name_count
)
5405 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5407 namei
, map
.name_count
,
5408 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5412 const ULONGEST namei_entry_offs
5413 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5414 + namei
* map
.offset_size
),
5415 map
.offset_size
, map
.dwarf5_byte_order
);
5416 return map
.entry_pool
+ namei_entry_offs
;
5419 /* See dw2_debug_names_iterator. */
5421 dwarf2_per_cu_data
*
5422 dw2_debug_names_iterator::next ()
5427 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5428 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5429 bfd
*const abfd
= objfile
->obfd
;
5433 unsigned int bytes_read
;
5434 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5435 m_addr
+= bytes_read
;
5439 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5440 if (indexval_it
== m_map
.abbrev_map
.cend ())
5442 complaint (_("Wrong .debug_names undefined abbrev code %s "
5444 pulongest (abbrev
), objfile_name (objfile
));
5447 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5448 enum class symbol_linkage
{
5452 } symbol_linkage_
= symbol_linkage::unknown
;
5453 dwarf2_per_cu_data
*per_cu
= NULL
;
5454 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5459 case DW_FORM_implicit_const
:
5460 ull
= attr
.implicit_const
;
5462 case DW_FORM_flag_present
:
5466 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5467 m_addr
+= bytes_read
;
5470 ull
= read_4_bytes (abfd
, m_addr
);
5474 ull
= read_8_bytes (abfd
, m_addr
);
5477 case DW_FORM_ref_sig8
:
5478 ull
= read_8_bytes (abfd
, m_addr
);
5482 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5483 dwarf_form_name (attr
.form
),
5484 objfile_name (objfile
));
5487 switch (attr
.dw_idx
)
5489 case DW_IDX_compile_unit
:
5490 /* Don't crash on bad data. */
5491 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
5493 complaint (_(".debug_names entry has bad CU index %s"
5496 objfile_name (dwarf2_per_objfile
->objfile
));
5499 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (ull
);
5501 case DW_IDX_type_unit
:
5502 /* Don't crash on bad data. */
5503 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_type_units
.size ())
5505 complaint (_(".debug_names entry has bad TU index %s"
5508 objfile_name (dwarf2_per_objfile
->objfile
));
5511 per_cu
= &dwarf2_per_objfile
->per_bfd
->get_tu (ull
)->per_cu
;
5513 case DW_IDX_die_offset
:
5514 /* In a per-CU index (as opposed to a per-module index), index
5515 entries without CU attribute implicitly refer to the single CU. */
5517 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cu (0);
5519 case DW_IDX_GNU_internal
:
5520 if (!m_map
.augmentation_is_gdb
)
5522 symbol_linkage_
= symbol_linkage::static_
;
5524 case DW_IDX_GNU_external
:
5525 if (!m_map
.augmentation_is_gdb
)
5527 symbol_linkage_
= symbol_linkage::extern_
;
5532 /* Skip if already read in. */
5533 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
5536 /* Check static vs global. */
5537 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5539 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5540 const bool symbol_is_static
=
5541 symbol_linkage_
== symbol_linkage::static_
;
5542 if (want_static
!= symbol_is_static
)
5546 /* Match dw2_symtab_iter_next, symbol_kind
5547 and debug_names::psymbol_tag. */
5551 switch (indexval
.dwarf_tag
)
5553 case DW_TAG_variable
:
5554 case DW_TAG_subprogram
:
5555 /* Some types are also in VAR_DOMAIN. */
5556 case DW_TAG_typedef
:
5557 case DW_TAG_structure_type
:
5564 switch (indexval
.dwarf_tag
)
5566 case DW_TAG_typedef
:
5567 case DW_TAG_structure_type
:
5574 switch (indexval
.dwarf_tag
)
5577 case DW_TAG_variable
:
5584 switch (indexval
.dwarf_tag
)
5596 /* Match dw2_expand_symtabs_matching, symbol_kind and
5597 debug_names::psymbol_tag. */
5600 case VARIABLES_DOMAIN
:
5601 switch (indexval
.dwarf_tag
)
5603 case DW_TAG_variable
:
5609 case FUNCTIONS_DOMAIN
:
5610 switch (indexval
.dwarf_tag
)
5612 case DW_TAG_subprogram
:
5619 switch (indexval
.dwarf_tag
)
5621 case DW_TAG_typedef
:
5622 case DW_TAG_structure_type
:
5628 case MODULES_DOMAIN
:
5629 switch (indexval
.dwarf_tag
)
5643 static struct compunit_symtab
*
5644 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5645 const char *name
, domain_enum domain
)
5647 struct dwarf2_per_objfile
*dwarf2_per_objfile
5648 = get_dwarf2_per_objfile (objfile
);
5650 const auto &mapp
= dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5653 /* index is NULL if OBJF_READNOW. */
5656 const auto &map
= *mapp
;
5658 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5660 struct compunit_symtab
*stab_best
= NULL
;
5661 struct dwarf2_per_cu_data
*per_cu
;
5662 while ((per_cu
= iter
.next ()) != NULL
)
5664 struct symbol
*sym
, *with_opaque
= NULL
;
5665 compunit_symtab
*stab
5666 = dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
5667 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5668 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5670 sym
= block_find_symbol (block
, name
, domain
,
5671 block_find_non_opaque_type_preferred
,
5674 /* Some caution must be observed with overloaded functions and
5675 methods, since the index will not contain any overload
5676 information (but NAME might contain it). */
5679 && strcmp_iw (sym
->search_name (), name
) == 0)
5681 if (with_opaque
!= NULL
5682 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5685 /* Keep looking through other CUs. */
5691 /* This dumps minimal information about .debug_names. It is called
5692 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5693 uses this to verify that .debug_names has been loaded. */
5696 dw2_debug_names_dump (struct objfile
*objfile
)
5698 struct dwarf2_per_objfile
*dwarf2_per_objfile
5699 = get_dwarf2_per_objfile (objfile
);
5701 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
5702 printf_filtered (".debug_names:");
5703 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5704 printf_filtered (" exists\n");
5706 printf_filtered (" faked for \"readnow\"\n");
5707 printf_filtered ("\n");
5711 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5712 const char *func_name
)
5714 struct dwarf2_per_objfile
*dwarf2_per_objfile
5715 = get_dwarf2_per_objfile (objfile
);
5717 /* dwarf2_per_objfile->per_bfd->debug_names_table is NULL if OBJF_READNOW. */
5718 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5720 const mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5722 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5724 struct dwarf2_per_cu_data
*per_cu
;
5725 while ((per_cu
= iter
.next ()) != NULL
)
5726 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
5731 dw2_debug_names_map_matching_symbols
5732 (struct objfile
*objfile
,
5733 const lookup_name_info
&name
, domain_enum domain
,
5735 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5736 symbol_compare_ftype
*ordered_compare
)
5738 struct dwarf2_per_objfile
*dwarf2_per_objfile
5739 = get_dwarf2_per_objfile (objfile
);
5741 /* debug_names_table is NULL if OBJF_READNOW. */
5742 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5745 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5746 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5748 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5749 auto matcher
= [&] (const char *symname
)
5751 if (ordered_compare
== nullptr)
5753 return ordered_compare (symname
, match_name
) == 0;
5756 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5757 [&] (offset_type namei
)
5759 /* The name was matched, now expand corresponding CUs that were
5761 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5763 struct dwarf2_per_cu_data
*per_cu
;
5764 while ((per_cu
= iter
.next ()) != NULL
)
5765 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, nullptr,
5770 /* It's a shame we couldn't do this inside the
5771 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5772 that have already been expanded. Instead, this loop matches what
5773 the psymtab code does. */
5774 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5776 compunit_symtab
*symtab
= dwarf2_per_objfile
->get_symtab (per_cu
);
5777 if (symtab
!= nullptr)
5779 const struct block
*block
5780 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (symtab
), block_kind
);
5781 if (!iterate_over_symbols_terminated (block
, name
,
5789 dw2_debug_names_expand_symtabs_matching
5790 (struct objfile
*objfile
,
5791 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5792 const lookup_name_info
*lookup_name
,
5793 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5794 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5795 enum search_domain kind
)
5797 struct dwarf2_per_objfile
*dwarf2_per_objfile
5798 = get_dwarf2_per_objfile (objfile
);
5800 /* debug_names_table is NULL if OBJF_READNOW. */
5801 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5804 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5806 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5808 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5812 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
5813 file_matcher
, expansion_notify
);
5818 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5820 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5822 kind
, [&] (offset_type namei
)
5824 /* The name was matched, now expand corresponding CUs that were
5826 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5828 struct dwarf2_per_cu_data
*per_cu
;
5829 while ((per_cu
= iter
.next ()) != NULL
)
5830 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
5831 file_matcher
, expansion_notify
);
5836 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5839 dw2_find_last_source_symtab
,
5840 dw2_forget_cached_source_info
,
5841 dw2_map_symtabs_matching_filename
,
5842 dw2_debug_names_lookup_symbol
,
5845 dw2_debug_names_dump
,
5846 dw2_debug_names_expand_symtabs_for_function
,
5847 dw2_expand_all_symtabs
,
5848 dw2_expand_symtabs_with_fullname
,
5849 dw2_debug_names_map_matching_symbols
,
5850 dw2_debug_names_expand_symtabs_matching
,
5851 dw2_find_pc_sect_compunit_symtab
,
5853 dw2_map_symbol_filenames
5856 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5857 to either a dwarf2_per_bfd or dwz_file object. */
5859 template <typename T
>
5860 static gdb::array_view
<const gdb_byte
>
5861 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5863 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5865 if (section
->empty ())
5868 /* Older elfutils strip versions could keep the section in the main
5869 executable while splitting it for the separate debug info file. */
5870 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5873 section
->read (obj
);
5875 /* dwarf2_section_info::size is a bfd_size_type, while
5876 gdb::array_view works with size_t. On 32-bit hosts, with
5877 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5878 is 32-bit. So we need an explicit narrowing conversion here.
5879 This is fine, because it's impossible to allocate or mmap an
5880 array/buffer larger than what size_t can represent. */
5881 return gdb::make_array_view (section
->buffer
, section
->size
);
5884 /* Lookup the index cache for the contents of the index associated to
5887 static gdb::array_view
<const gdb_byte
>
5888 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_bfd
*dwarf2_per_bfd
)
5890 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5891 if (build_id
== nullptr)
5894 return global_index_cache
.lookup_gdb_index (build_id
,
5895 &dwarf2_per_bfd
->index_cache_res
);
5898 /* Same as the above, but for DWZ. */
5900 static gdb::array_view
<const gdb_byte
>
5901 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5903 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5904 if (build_id
== nullptr)
5907 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5910 /* See symfile.h. */
5913 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5915 struct dwarf2_per_objfile
*dwarf2_per_objfile
5916 = get_dwarf2_per_objfile (objfile
);
5918 /* If we're about to read full symbols, don't bother with the
5919 indices. In this case we also don't care if some other debug
5920 format is making psymtabs, because they are all about to be
5922 if ((objfile
->flags
& OBJF_READNOW
))
5924 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5925 create_all_comp_units (dwarf2_per_objfile
);
5926 create_all_type_units (dwarf2_per_objfile
);
5927 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
5928 = create_quick_file_names_table
5929 (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5930 dwarf2_per_objfile
->resize_symtabs ();
5932 for (int i
= 0; i
< (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
5933 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()); ++i
)
5935 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
5937 per_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
5938 struct dwarf2_per_cu_quick_data
);
5941 /* Return 1 so that gdb sees the "quick" functions. However,
5942 these functions will be no-ops because we will have expanded
5944 *index_kind
= dw_index_kind::GDB_INDEX
;
5948 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5950 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5951 dwarf2_per_objfile
->resize_symtabs ();
5955 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5956 get_gdb_index_contents_from_section
<struct dwarf2_per_bfd
>,
5957 get_gdb_index_contents_from_section
<dwz_file
>))
5959 *index_kind
= dw_index_kind::GDB_INDEX
;
5960 dwarf2_per_objfile
->resize_symtabs ();
5964 /* ... otherwise, try to find the index in the index cache. */
5965 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5966 get_gdb_index_contents_from_cache
,
5967 get_gdb_index_contents_from_cache_dwz
))
5969 global_index_cache
.hit ();
5970 *index_kind
= dw_index_kind::GDB_INDEX
;
5971 dwarf2_per_objfile
->resize_symtabs ();
5975 global_index_cache
.miss ();
5981 /* Build a partial symbol table. */
5984 dwarf2_build_psymtabs (struct objfile
*objfile
)
5986 struct dwarf2_per_objfile
*dwarf2_per_objfile
5987 = get_dwarf2_per_objfile (objfile
);
5989 init_psymbol_list (objfile
, 1024);
5993 /* This isn't really ideal: all the data we allocate on the
5994 objfile's obstack is still uselessly kept around. However,
5995 freeing it seems unsafe. */
5996 psymtab_discarder
psymtabs (objfile
);
5997 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6000 dwarf2_per_objfile
->resize_symtabs ();
6002 /* (maybe) store an index in the cache. */
6003 global_index_cache
.store (dwarf2_per_objfile
);
6005 catch (const gdb_exception_error
&except
)
6007 exception_print (gdb_stderr
, except
);
6011 /* Find the base address of the compilation unit for range lists and
6012 location lists. It will normally be specified by DW_AT_low_pc.
6013 In DWARF-3 draft 4, the base address could be overridden by
6014 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6015 compilation units with discontinuous ranges. */
6018 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6020 struct attribute
*attr
;
6022 cu
->base_address
.reset ();
6024 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6025 if (attr
!= nullptr)
6026 cu
->base_address
= attr
->value_as_address ();
6029 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6030 if (attr
!= nullptr)
6031 cu
->base_address
= attr
->value_as_address ();
6035 /* Helper function that returns the proper abbrev section for
6038 static struct dwarf2_section_info
*
6039 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6041 struct dwarf2_section_info
*abbrev
;
6042 dwarf2_per_bfd
*per_bfd
= this_cu
->per_bfd
;
6044 if (this_cu
->is_dwz
)
6045 abbrev
= &dwarf2_get_dwz_file (per_bfd
)->abbrev
;
6047 abbrev
= &per_bfd
->abbrev
;
6052 /* Fetch the abbreviation table offset from a comp or type unit header. */
6055 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6056 struct dwarf2_section_info
*section
,
6057 sect_offset sect_off
)
6059 bfd
*abfd
= section
->get_bfd_owner ();
6060 const gdb_byte
*info_ptr
;
6061 unsigned int initial_length_size
, offset_size
;
6064 section
->read (dwarf2_per_objfile
->objfile
);
6065 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6066 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6067 offset_size
= initial_length_size
== 4 ? 4 : 8;
6068 info_ptr
+= initial_length_size
;
6070 version
= read_2_bytes (abfd
, info_ptr
);
6074 /* Skip unit type and address size. */
6078 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6081 /* A partial symtab that is used only for include files. */
6082 struct dwarf2_include_psymtab
: public partial_symtab
6084 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6085 : partial_symtab (filename
, objfile
)
6089 void read_symtab (struct objfile
*objfile
) override
6091 /* It's an include file, no symbols to read for it.
6092 Everything is in the includer symtab. */
6094 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6095 expansion of the includer psymtab. We use the dependencies[0] field to
6096 model the includer. But if we go the regular route of calling
6097 expand_psymtab here, and having expand_psymtab call expand_dependencies
6098 to expand the includer, we'll only use expand_psymtab on the includer
6099 (making it a non-toplevel psymtab), while if we expand the includer via
6100 another path, we'll use read_symtab (making it a toplevel psymtab).
6101 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6102 psymtab, and trigger read_symtab on the includer here directly. */
6103 includer ()->read_symtab (objfile
);
6106 void expand_psymtab (struct objfile
*objfile
) override
6108 /* This is not called by read_symtab, and should not be called by any
6109 expand_dependencies. */
6113 bool readin_p (struct objfile
*objfile
) const override
6115 return includer ()->readin_p (objfile
);
6118 compunit_symtab
*get_compunit_symtab (struct objfile
*objfile
) const override
6124 partial_symtab
*includer () const
6126 /* An include psymtab has exactly one dependency: the psymtab that
6128 gdb_assert (this->number_of_dependencies
== 1);
6129 return this->dependencies
[0];
6133 /* Allocate a new partial symtab for file named NAME and mark this new
6134 partial symtab as being an include of PST. */
6137 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6138 struct objfile
*objfile
)
6140 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6142 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6143 subpst
->dirname
= pst
->dirname
;
6145 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6146 subpst
->dependencies
[0] = pst
;
6147 subpst
->number_of_dependencies
= 1;
6150 /* Read the Line Number Program data and extract the list of files
6151 included by the source file represented by PST. Build an include
6152 partial symtab for each of these included files. */
6155 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6156 struct die_info
*die
,
6157 dwarf2_psymtab
*pst
)
6160 struct attribute
*attr
;
6162 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6163 if (attr
!= nullptr)
6164 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6166 return; /* No linetable, so no includes. */
6168 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6169 that we pass in the raw text_low here; that is ok because we're
6170 only decoding the line table to make include partial symtabs, and
6171 so the addresses aren't really used. */
6172 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6173 pst
->raw_text_low (), 1);
6177 hash_signatured_type (const void *item
)
6179 const struct signatured_type
*sig_type
6180 = (const struct signatured_type
*) item
;
6182 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6183 return sig_type
->signature
;
6187 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6189 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6190 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6192 return lhs
->signature
== rhs
->signature
;
6195 /* Allocate a hash table for signatured types. */
6198 allocate_signatured_type_table ()
6200 return htab_up (htab_create_alloc (41,
6201 hash_signatured_type
,
6203 NULL
, xcalloc
, xfree
));
6206 /* A helper function to add a signatured type CU to a table. */
6209 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6211 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6212 std::vector
<signatured_type
*> *all_type_units
6213 = (std::vector
<signatured_type
*> *) datum
;
6215 all_type_units
->push_back (sigt
);
6220 /* A helper for create_debug_types_hash_table. Read types from SECTION
6221 and fill them into TYPES_HTAB. It will process only type units,
6222 therefore DW_UT_type. */
6225 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6226 struct dwo_file
*dwo_file
,
6227 dwarf2_section_info
*section
, htab_up
&types_htab
,
6228 rcuh_kind section_kind
)
6230 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6231 struct dwarf2_section_info
*abbrev_section
;
6233 const gdb_byte
*info_ptr
, *end_ptr
;
6235 abbrev_section
= (dwo_file
!= NULL
6236 ? &dwo_file
->sections
.abbrev
6237 : &dwarf2_per_objfile
->per_bfd
->abbrev
);
6239 if (dwarf_read_debug
)
6240 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6241 section
->get_name (),
6242 abbrev_section
->get_file_name ());
6244 section
->read (objfile
);
6245 info_ptr
= section
->buffer
;
6247 if (info_ptr
== NULL
)
6250 /* We can't set abfd until now because the section may be empty or
6251 not present, in which case the bfd is unknown. */
6252 abfd
= section
->get_bfd_owner ();
6254 /* We don't use cutu_reader here because we don't need to read
6255 any dies: the signature is in the header. */
6257 end_ptr
= info_ptr
+ section
->size
;
6258 while (info_ptr
< end_ptr
)
6260 struct signatured_type
*sig_type
;
6261 struct dwo_unit
*dwo_tu
;
6263 const gdb_byte
*ptr
= info_ptr
;
6264 struct comp_unit_head header
;
6265 unsigned int length
;
6267 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6269 /* Initialize it due to a false compiler warning. */
6270 header
.signature
= -1;
6271 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6273 /* We need to read the type's signature in order to build the hash
6274 table, but we don't need anything else just yet. */
6276 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6277 abbrev_section
, ptr
, section_kind
);
6279 length
= header
.get_length ();
6281 /* Skip dummy type units. */
6282 if (ptr
>= info_ptr
+ length
6283 || peek_abbrev_code (abfd
, ptr
) == 0
6284 || header
.unit_type
!= DW_UT_type
)
6290 if (types_htab
== NULL
)
6293 types_htab
= allocate_dwo_unit_table ();
6295 types_htab
= allocate_signatured_type_table ();
6301 dwo_tu
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6303 dwo_tu
->dwo_file
= dwo_file
;
6304 dwo_tu
->signature
= header
.signature
;
6305 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6306 dwo_tu
->section
= section
;
6307 dwo_tu
->sect_off
= sect_off
;
6308 dwo_tu
->length
= length
;
6312 /* N.B.: type_offset is not usable if this type uses a DWO file.
6313 The real type_offset is in the DWO file. */
6315 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6316 sig_type
->signature
= header
.signature
;
6317 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6318 sig_type
->per_cu
.is_debug_types
= 1;
6319 sig_type
->per_cu
.section
= section
;
6320 sig_type
->per_cu
.sect_off
= sect_off
;
6321 sig_type
->per_cu
.length
= length
;
6324 slot
= htab_find_slot (types_htab
.get (),
6325 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6327 gdb_assert (slot
!= NULL
);
6330 sect_offset dup_sect_off
;
6334 const struct dwo_unit
*dup_tu
6335 = (const struct dwo_unit
*) *slot
;
6337 dup_sect_off
= dup_tu
->sect_off
;
6341 const struct signatured_type
*dup_tu
6342 = (const struct signatured_type
*) *slot
;
6344 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6347 complaint (_("debug type entry at offset %s is duplicate to"
6348 " the entry at offset %s, signature %s"),
6349 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6350 hex_string (header
.signature
));
6352 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6354 if (dwarf_read_debug
> 1)
6355 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6356 sect_offset_str (sect_off
),
6357 hex_string (header
.signature
));
6363 /* Create the hash table of all entries in the .debug_types
6364 (or .debug_types.dwo) section(s).
6365 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6366 otherwise it is NULL.
6368 The result is a pointer to the hash table or NULL if there are no types.
6370 Note: This function processes DWO files only, not DWP files. */
6373 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6374 struct dwo_file
*dwo_file
,
6375 gdb::array_view
<dwarf2_section_info
> type_sections
,
6376 htab_up
&types_htab
)
6378 for (dwarf2_section_info
§ion
: type_sections
)
6379 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6380 types_htab
, rcuh_kind::TYPE
);
6383 /* Create the hash table of all entries in the .debug_types section,
6384 and initialize all_type_units.
6385 The result is zero if there is an error (e.g. missing .debug_types section),
6386 otherwise non-zero. */
6389 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6393 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6394 &dwarf2_per_objfile
->per_bfd
->info
, types_htab
,
6395 rcuh_kind::COMPILE
);
6396 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6397 dwarf2_per_objfile
->per_bfd
->types
, types_htab
);
6398 if (types_htab
== NULL
)
6400 dwarf2_per_objfile
->per_bfd
->signatured_types
= NULL
;
6404 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (types_htab
);
6406 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
6407 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve
6408 (htab_elements (dwarf2_per_objfile
->per_bfd
->signatured_types
.get ()));
6410 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6411 add_signatured_type_cu_to_table
,
6412 &dwarf2_per_objfile
->per_bfd
->all_type_units
);
6417 /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types.
6418 If SLOT is non-NULL, it is the entry to use in the hash table.
6419 Otherwise we find one. */
6421 static struct signatured_type
*
6422 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6425 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()
6426 == dwarf2_per_objfile
->per_bfd
->all_type_units
.capacity ())
6427 ++dwarf2_per_objfile
->per_bfd
->tu_stats
.nr_all_type_units_reallocs
;
6429 signatured_type
*sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6431 dwarf2_per_objfile
->resize_symtabs ();
6433 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
6434 sig_type
->signature
= sig
;
6435 sig_type
->per_cu
.is_debug_types
= 1;
6436 if (dwarf2_per_objfile
->per_bfd
->using_index
)
6438 sig_type
->per_cu
.v
.quick
=
6439 OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6440 struct dwarf2_per_cu_quick_data
);
6445 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6448 gdb_assert (*slot
== NULL
);
6450 /* The rest of sig_type must be filled in by the caller. */
6454 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6455 Fill in SIG_ENTRY with DWO_ENTRY. */
6458 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6459 struct signatured_type
*sig_entry
,
6460 struct dwo_unit
*dwo_entry
)
6462 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
6464 /* Make sure we're not clobbering something we don't expect to. */
6465 gdb_assert (! sig_entry
->per_cu
.queued
);
6466 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6467 if (per_bfd
->using_index
)
6469 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6470 gdb_assert (!dwarf2_per_objfile
->symtab_set_p (&sig_entry
->per_cu
));
6473 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6474 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6475 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6476 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6477 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6479 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6480 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6481 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6482 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6483 sig_entry
->per_cu
.per_bfd
= per_bfd
;
6484 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6485 sig_entry
->dwo_unit
= dwo_entry
;
6488 /* Subroutine of lookup_signatured_type.
6489 If we haven't read the TU yet, create the signatured_type data structure
6490 for a TU to be read in directly from a DWO file, bypassing the stub.
6491 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6492 using .gdb_index, then when reading a CU we want to stay in the DWO file
6493 containing that CU. Otherwise we could end up reading several other DWO
6494 files (due to comdat folding) to process the transitive closure of all the
6495 mentioned TUs, and that can be slow. The current DWO file will have every
6496 type signature that it needs.
6497 We only do this for .gdb_index because in the psymtab case we already have
6498 to read all the DWOs to build the type unit groups. */
6500 static struct signatured_type
*
6501 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6503 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6504 struct dwo_file
*dwo_file
;
6505 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6506 struct signatured_type find_sig_entry
, *sig_entry
;
6509 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6511 /* If TU skeletons have been removed then we may not have read in any
6513 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6514 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6516 /* We only ever need to read in one copy of a signatured type.
6517 Use the global signatured_types array to do our own comdat-folding
6518 of types. If this is the first time we're reading this TU, and
6519 the TU has an entry in .gdb_index, replace the recorded data from
6520 .gdb_index with this TU. */
6522 find_sig_entry
.signature
= sig
;
6523 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6524 &find_sig_entry
, INSERT
);
6525 sig_entry
= (struct signatured_type
*) *slot
;
6527 /* We can get here with the TU already read, *or* in the process of being
6528 read. Don't reassign the global entry to point to this DWO if that's
6529 the case. Also note that if the TU is already being read, it may not
6530 have come from a DWO, the program may be a mix of Fission-compiled
6531 code and non-Fission-compiled code. */
6533 /* Have we already tried to read this TU?
6534 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6535 needn't exist in the global table yet). */
6536 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6539 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6540 dwo_unit of the TU itself. */
6541 dwo_file
= cu
->dwo_unit
->dwo_file
;
6543 /* Ok, this is the first time we're reading this TU. */
6544 if (dwo_file
->tus
== NULL
)
6546 find_dwo_entry
.signature
= sig
;
6547 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6549 if (dwo_entry
== NULL
)
6552 /* If the global table doesn't have an entry for this TU, add one. */
6553 if (sig_entry
== NULL
)
6554 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6556 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6557 sig_entry
->per_cu
.tu_read
= 1;
6561 /* Subroutine of lookup_signatured_type.
6562 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6563 then try the DWP file. If the TU stub (skeleton) has been removed then
6564 it won't be in .gdb_index. */
6566 static struct signatured_type
*
6567 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6569 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6570 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6571 struct dwo_unit
*dwo_entry
;
6572 struct signatured_type find_sig_entry
, *sig_entry
;
6575 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6576 gdb_assert (dwp_file
!= NULL
);
6578 /* If TU skeletons have been removed then we may not have read in any
6580 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6581 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6583 find_sig_entry
.signature
= sig
;
6584 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6585 &find_sig_entry
, INSERT
);
6586 sig_entry
= (struct signatured_type
*) *slot
;
6588 /* Have we already tried to read this TU?
6589 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6590 needn't exist in the global table yet). */
6591 if (sig_entry
!= NULL
)
6594 if (dwp_file
->tus
== NULL
)
6596 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6597 sig
, 1 /* is_debug_types */);
6598 if (dwo_entry
== NULL
)
6601 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6602 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6607 /* Lookup a signature based type for DW_FORM_ref_sig8.
6608 Returns NULL if signature SIG is not present in the table.
6609 It is up to the caller to complain about this. */
6611 static struct signatured_type
*
6612 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6614 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6617 && dwarf2_per_objfile
->per_bfd
->using_index
)
6619 /* We're in a DWO/DWP file, and we're using .gdb_index.
6620 These cases require special processing. */
6621 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6622 return lookup_dwo_signatured_type (cu
, sig
);
6624 return lookup_dwp_signatured_type (cu
, sig
);
6628 struct signatured_type find_entry
, *entry
;
6630 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6632 find_entry
.signature
= sig
;
6633 entry
= ((struct signatured_type
*)
6634 htab_find (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6640 /* Low level DIE reading support. */
6642 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6645 init_cu_die_reader (struct die_reader_specs
*reader
,
6646 struct dwarf2_cu
*cu
,
6647 struct dwarf2_section_info
*section
,
6648 struct dwo_file
*dwo_file
,
6649 struct abbrev_table
*abbrev_table
)
6651 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6652 reader
->abfd
= section
->get_bfd_owner ();
6654 reader
->dwo_file
= dwo_file
;
6655 reader
->die_section
= section
;
6656 reader
->buffer
= section
->buffer
;
6657 reader
->buffer_end
= section
->buffer
+ section
->size
;
6658 reader
->abbrev_table
= abbrev_table
;
6661 /* Subroutine of cutu_reader to simplify it.
6662 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6663 There's just a lot of work to do, and cutu_reader is big enough
6666 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6667 from it to the DIE in the DWO. If NULL we are skipping the stub.
6668 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6669 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6670 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6671 STUB_COMP_DIR may be non-NULL.
6672 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6673 are filled in with the info of the DIE from the DWO file.
6674 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6675 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6676 kept around for at least as long as *RESULT_READER.
6678 The result is non-zero if a valid (non-dummy) DIE was found. */
6681 read_cutu_die_from_dwo (dwarf2_cu
*cu
,
6682 struct dwo_unit
*dwo_unit
,
6683 struct die_info
*stub_comp_unit_die
,
6684 const char *stub_comp_dir
,
6685 struct die_reader_specs
*result_reader
,
6686 const gdb_byte
**result_info_ptr
,
6687 struct die_info
**result_comp_unit_die
,
6688 abbrev_table_up
*result_dwo_abbrev_table
)
6690 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6691 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6692 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6694 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6695 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6696 int i
,num_extra_attrs
;
6697 struct dwarf2_section_info
*dwo_abbrev_section
;
6698 struct die_info
*comp_unit_die
;
6700 /* At most one of these may be provided. */
6701 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6703 /* These attributes aren't processed until later:
6704 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6705 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6706 referenced later. However, these attributes are found in the stub
6707 which we won't have later. In order to not impose this complication
6708 on the rest of the code, we read them here and copy them to the
6717 if (stub_comp_unit_die
!= NULL
)
6719 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6721 if (!per_cu
->is_debug_types
)
6722 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6723 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6724 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6725 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6726 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6728 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6730 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6731 here (if needed). We need the value before we can process
6733 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6735 else if (stub_comp_dir
!= NULL
)
6737 /* Reconstruct the comp_dir attribute to simplify the code below. */
6738 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6739 comp_dir
->name
= DW_AT_comp_dir
;
6740 comp_dir
->form
= DW_FORM_string
;
6741 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6742 DW_STRING (comp_dir
) = stub_comp_dir
;
6745 /* Set up for reading the DWO CU/TU. */
6746 cu
->dwo_unit
= dwo_unit
;
6747 dwarf2_section_info
*section
= dwo_unit
->section
;
6748 section
->read (objfile
);
6749 abfd
= section
->get_bfd_owner ();
6750 begin_info_ptr
= info_ptr
= (section
->buffer
6751 + to_underlying (dwo_unit
->sect_off
));
6752 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6754 if (per_cu
->is_debug_types
)
6756 signatured_type
*sig_type
= (struct signatured_type
*) per_cu
;
6758 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6759 &cu
->header
, section
,
6761 info_ptr
, rcuh_kind::TYPE
);
6762 /* This is not an assert because it can be caused by bad debug info. */
6763 if (sig_type
->signature
!= cu
->header
.signature
)
6765 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6766 " TU at offset %s [in module %s]"),
6767 hex_string (sig_type
->signature
),
6768 hex_string (cu
->header
.signature
),
6769 sect_offset_str (dwo_unit
->sect_off
),
6770 bfd_get_filename (abfd
));
6772 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6773 /* For DWOs coming from DWP files, we don't know the CU length
6774 nor the type's offset in the TU until now. */
6775 dwo_unit
->length
= cu
->header
.get_length ();
6776 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6778 /* Establish the type offset that can be used to lookup the type.
6779 For DWO files, we don't know it until now. */
6780 sig_type
->type_offset_in_section
6781 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6785 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6786 &cu
->header
, section
,
6788 info_ptr
, rcuh_kind::COMPILE
);
6789 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6790 /* For DWOs coming from DWP files, we don't know the CU length
6792 dwo_unit
->length
= cu
->header
.get_length ();
6795 *result_dwo_abbrev_table
6796 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6797 cu
->header
.abbrev_sect_off
);
6798 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6799 result_dwo_abbrev_table
->get ());
6801 /* Read in the die, but leave space to copy over the attributes
6802 from the stub. This has the benefit of simplifying the rest of
6803 the code - all the work to maintain the illusion of a single
6804 DW_TAG_{compile,type}_unit DIE is done here. */
6805 num_extra_attrs
= ((stmt_list
!= NULL
)
6809 + (comp_dir
!= NULL
));
6810 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6813 /* Copy over the attributes from the stub to the DIE we just read in. */
6814 comp_unit_die
= *result_comp_unit_die
;
6815 i
= comp_unit_die
->num_attrs
;
6816 if (stmt_list
!= NULL
)
6817 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6819 comp_unit_die
->attrs
[i
++] = *low_pc
;
6820 if (high_pc
!= NULL
)
6821 comp_unit_die
->attrs
[i
++] = *high_pc
;
6823 comp_unit_die
->attrs
[i
++] = *ranges
;
6824 if (comp_dir
!= NULL
)
6825 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6826 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6828 if (dwarf_die_debug
)
6830 fprintf_unfiltered (gdb_stdlog
,
6831 "Read die from %s@0x%x of %s:\n",
6832 section
->get_name (),
6833 (unsigned) (begin_info_ptr
- section
->buffer
),
6834 bfd_get_filename (abfd
));
6835 dump_die (comp_unit_die
, dwarf_die_debug
);
6838 /* Skip dummy compilation units. */
6839 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6840 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6843 *result_info_ptr
= info_ptr
;
6847 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6848 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6849 signature is part of the header. */
6850 static gdb::optional
<ULONGEST
>
6851 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6853 if (cu
->header
.version
>= 5)
6854 return cu
->header
.signature
;
6855 struct attribute
*attr
;
6856 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6857 if (attr
== nullptr)
6858 return gdb::optional
<ULONGEST
> ();
6859 return DW_UNSND (attr
);
6862 /* Subroutine of cutu_reader to simplify it.
6863 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6864 Returns NULL if the specified DWO unit cannot be found. */
6866 static struct dwo_unit
*
6867 lookup_dwo_unit (dwarf2_cu
*cu
, die_info
*comp_unit_die
, const char *dwo_name
)
6869 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6870 struct dwo_unit
*dwo_unit
;
6871 const char *comp_dir
;
6873 gdb_assert (cu
!= NULL
);
6875 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6876 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6877 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6879 if (per_cu
->is_debug_types
)
6880 dwo_unit
= lookup_dwo_type_unit (cu
, dwo_name
, comp_dir
);
6883 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6885 if (!signature
.has_value ())
6886 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6888 dwo_name
, bfd_get_filename (per_cu
->per_bfd
->obfd
));
6890 dwo_unit
= lookup_dwo_comp_unit (cu
, dwo_name
, comp_dir
, *signature
);
6896 /* Subroutine of cutu_reader to simplify it.
6897 See it for a description of the parameters.
6898 Read a TU directly from a DWO file, bypassing the stub. */
6901 cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
6902 dwarf2_per_objfile
*per_objfile
,
6903 int use_existing_cu
)
6905 struct signatured_type
*sig_type
;
6907 /* Verify we can do the following downcast, and that we have the
6909 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6910 sig_type
= (struct signatured_type
*) this_cu
;
6911 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6913 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6915 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6916 /* There's no need to do the rereading_dwo_cu handling that
6917 cutu_reader does since we don't read the stub. */
6921 /* If !use_existing_cu, this_cu->cu must be NULL. */
6922 gdb_assert (this_cu
->cu
== NULL
);
6923 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
6926 /* A future optimization, if needed, would be to use an existing
6927 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6928 could share abbrev tables. */
6930 if (read_cutu_die_from_dwo (this_cu
->cu
, sig_type
->dwo_unit
,
6931 NULL
/* stub_comp_unit_die */,
6932 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6935 &m_dwo_abbrev_table
) == 0)
6942 /* Initialize a CU (or TU) and read its DIEs.
6943 If the CU defers to a DWO file, read the DWO file as well.
6945 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6946 Otherwise the table specified in the comp unit header is read in and used.
6947 This is an optimization for when we already have the abbrev table.
6949 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6950 Otherwise, a new CU is allocated with xmalloc. */
6952 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
6953 dwarf2_per_objfile
*dwarf2_per_objfile
,
6954 struct abbrev_table
*abbrev_table
,
6955 int use_existing_cu
,
6957 : die_reader_specs
{},
6960 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6961 struct dwarf2_section_info
*section
= this_cu
->section
;
6962 bfd
*abfd
= section
->get_bfd_owner ();
6963 struct dwarf2_cu
*cu
;
6964 const gdb_byte
*begin_info_ptr
;
6965 struct signatured_type
*sig_type
= NULL
;
6966 struct dwarf2_section_info
*abbrev_section
;
6967 /* Non-zero if CU currently points to a DWO file and we need to
6968 reread it. When this happens we need to reread the skeleton die
6969 before we can reread the DWO file (this only applies to CUs, not TUs). */
6970 int rereading_dwo_cu
= 0;
6972 if (dwarf_die_debug
)
6973 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6974 this_cu
->is_debug_types
? "type" : "comp",
6975 sect_offset_str (this_cu
->sect_off
));
6977 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6978 file (instead of going through the stub), short-circuit all of this. */
6979 if (this_cu
->reading_dwo_directly
)
6981 /* Narrow down the scope of possibilities to have to understand. */
6982 gdb_assert (this_cu
->is_debug_types
);
6983 gdb_assert (abbrev_table
== NULL
);
6984 init_tu_and_read_dwo_dies (this_cu
, dwarf2_per_objfile
, use_existing_cu
);
6988 /* This is cheap if the section is already read in. */
6989 section
->read (objfile
);
6991 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6993 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6995 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6998 /* If this CU is from a DWO file we need to start over, we need to
6999 refetch the attributes from the skeleton CU.
7000 This could be optimized by retrieving those attributes from when we
7001 were here the first time: the previous comp_unit_die was stored in
7002 comp_unit_obstack. But there's no data yet that we need this
7004 if (cu
->dwo_unit
!= NULL
)
7005 rereading_dwo_cu
= 1;
7009 /* If !use_existing_cu, this_cu->cu must be NULL. */
7010 gdb_assert (this_cu
->cu
== NULL
);
7011 m_new_cu
.reset (new dwarf2_cu (this_cu
, dwarf2_per_objfile
));
7012 cu
= m_new_cu
.get ();
7015 /* Get the header. */
7016 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7018 /* We already have the header, there's no need to read it in again. */
7019 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7023 if (this_cu
->is_debug_types
)
7025 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7026 &cu
->header
, section
,
7027 abbrev_section
, info_ptr
,
7030 /* Since per_cu is the first member of struct signatured_type,
7031 we can go from a pointer to one to a pointer to the other. */
7032 sig_type
= (struct signatured_type
*) this_cu
;
7033 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7034 gdb_assert (sig_type
->type_offset_in_tu
7035 == cu
->header
.type_cu_offset_in_tu
);
7036 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7038 /* LENGTH has not been set yet for type units if we're
7039 using .gdb_index. */
7040 this_cu
->length
= cu
->header
.get_length ();
7042 /* Establish the type offset that can be used to lookup the type. */
7043 sig_type
->type_offset_in_section
=
7044 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7046 this_cu
->dwarf_version
= cu
->header
.version
;
7050 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7051 &cu
->header
, section
,
7054 rcuh_kind::COMPILE
);
7056 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7057 if (this_cu
->length
== 0)
7058 this_cu
->length
= cu
->header
.get_length ();
7060 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7061 this_cu
->dwarf_version
= cu
->header
.version
;
7065 /* Skip dummy compilation units. */
7066 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7067 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7073 /* If we don't have them yet, read the abbrevs for this compilation unit.
7074 And if we need to read them now, make sure they're freed when we're
7076 if (abbrev_table
!= NULL
)
7077 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7080 m_abbrev_table_holder
7081 = abbrev_table::read (objfile
, abbrev_section
,
7082 cu
->header
.abbrev_sect_off
);
7083 abbrev_table
= m_abbrev_table_holder
.get ();
7086 /* Read the top level CU/TU die. */
7087 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7088 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7090 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7096 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7097 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7098 table from the DWO file and pass the ownership over to us. It will be
7099 referenced from READER, so we must make sure to free it after we're done
7102 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7103 DWO CU, that this test will fail (the attribute will not be present). */
7104 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7105 if (dwo_name
!= nullptr)
7107 struct dwo_unit
*dwo_unit
;
7108 struct die_info
*dwo_comp_unit_die
;
7110 if (comp_unit_die
->has_children
)
7112 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7113 " has children (offset %s) [in module %s]"),
7114 sect_offset_str (this_cu
->sect_off
),
7115 bfd_get_filename (abfd
));
7117 dwo_unit
= lookup_dwo_unit (cu
, comp_unit_die
, dwo_name
);
7118 if (dwo_unit
!= NULL
)
7120 if (read_cutu_die_from_dwo (cu
, dwo_unit
,
7121 comp_unit_die
, NULL
,
7124 &m_dwo_abbrev_table
) == 0)
7130 comp_unit_die
= dwo_comp_unit_die
;
7134 /* Yikes, we couldn't find the rest of the DIE, we only have
7135 the stub. A complaint has already been logged. There's
7136 not much more we can do except pass on the stub DIE to
7137 die_reader_func. We don't want to throw an error on bad
7144 cutu_reader::keep ()
7146 /* Done, clean up. */
7147 gdb_assert (!dummy_p
);
7148 if (m_new_cu
!= NULL
)
7150 /* We know that m_this_cu->cu is set, since we are in the process of
7152 gdb_assert (m_this_cu
->cu
!= nullptr);
7153 dwarf2_per_objfile
*dwarf2_per_objfile
= m_this_cu
->cu
->per_objfile
;
7155 /* Link this CU into read_in_chain. */
7156 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
7157 dwarf2_per_objfile
->per_bfd
->read_in_chain
= m_this_cu
;
7158 /* The chain owns it now. */
7159 m_new_cu
.release ();
7163 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7164 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7165 assumed to have already done the lookup to find the DWO file).
7167 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7168 THIS_CU->is_debug_types, but nothing else.
7170 We fill in THIS_CU->length.
7172 THIS_CU->cu is always freed when done.
7173 This is done in order to not leave THIS_CU->cu in a state where we have
7174 to care whether it refers to the "main" CU or the DWO CU.
7176 When parent_cu is passed, it is used to provide a default value for
7177 str_offsets_base and addr_base from the parent. */
7179 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7180 dwarf2_per_objfile
*dwarf2_per_objfile
,
7181 struct dwarf2_cu
*parent_cu
,
7182 struct dwo_file
*dwo_file
)
7183 : die_reader_specs
{},
7186 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7187 struct dwarf2_section_info
*section
= this_cu
->section
;
7188 bfd
*abfd
= section
->get_bfd_owner ();
7189 struct dwarf2_section_info
*abbrev_section
;
7190 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7192 if (dwarf_die_debug
)
7193 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7194 this_cu
->is_debug_types
? "type" : "comp",
7195 sect_offset_str (this_cu
->sect_off
));
7197 gdb_assert (this_cu
->cu
== NULL
);
7199 abbrev_section
= (dwo_file
!= NULL
7200 ? &dwo_file
->sections
.abbrev
7201 : get_abbrev_section_for_cu (this_cu
));
7203 /* This is cheap if the section is already read in. */
7204 section
->read (objfile
);
7206 m_new_cu
.reset (new dwarf2_cu (this_cu
, dwarf2_per_objfile
));
7208 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7209 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7210 &m_new_cu
->header
, section
,
7211 abbrev_section
, info_ptr
,
7212 (this_cu
->is_debug_types
7214 : rcuh_kind::COMPILE
));
7216 if (parent_cu
!= nullptr)
7218 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7219 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7221 this_cu
->length
= m_new_cu
->header
.get_length ();
7223 /* Skip dummy compilation units. */
7224 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7225 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7231 m_abbrev_table_holder
7232 = abbrev_table::read (objfile
, abbrev_section
,
7233 m_new_cu
->header
.abbrev_sect_off
);
7235 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7236 m_abbrev_table_holder
.get ());
7237 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7241 /* Type Unit Groups.
7243 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7244 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7245 so that all types coming from the same compilation (.o file) are grouped
7246 together. A future step could be to put the types in the same symtab as
7247 the CU the types ultimately came from. */
7250 hash_type_unit_group (const void *item
)
7252 const struct type_unit_group
*tu_group
7253 = (const struct type_unit_group
*) item
;
7255 return hash_stmt_list_entry (&tu_group
->hash
);
7259 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7261 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7262 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7264 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7267 /* Allocate a hash table for type unit groups. */
7270 allocate_type_unit_groups_table ()
7272 return htab_up (htab_create_alloc (3,
7273 hash_type_unit_group
,
7275 NULL
, xcalloc
, xfree
));
7278 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7279 partial symtabs. We combine several TUs per psymtab to not let the size
7280 of any one psymtab grow too big. */
7281 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7282 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7284 /* Helper routine for get_type_unit_group.
7285 Create the type_unit_group object used to hold one or more TUs. */
7287 static struct type_unit_group
*
7288 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7290 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
7291 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
7292 struct dwarf2_per_cu_data
*per_cu
;
7293 struct type_unit_group
*tu_group
;
7295 tu_group
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
7296 struct type_unit_group
);
7297 per_cu
= &tu_group
->per_cu
;
7298 per_cu
->per_bfd
= per_bfd
;
7300 if (per_bfd
->using_index
)
7302 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
7303 struct dwarf2_per_cu_quick_data
);
7307 unsigned int line_offset
= to_underlying (line_offset_struct
);
7308 dwarf2_psymtab
*pst
;
7311 /* Give the symtab a useful name for debug purposes. */
7312 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7313 name
= string_printf ("<type_units_%d>",
7314 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7316 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7318 pst
= create_partial_symtab (per_cu
, dwarf2_per_objfile
, name
.c_str ());
7319 pst
->anonymous
= true;
7322 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7323 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7328 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7329 STMT_LIST is a DW_AT_stmt_list attribute. */
7331 static struct type_unit_group
*
7332 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7334 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
7335 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7336 struct type_unit_group
*tu_group
;
7338 unsigned int line_offset
;
7339 struct type_unit_group type_unit_group_for_lookup
;
7341 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
)
7342 dwarf2_per_objfile
->per_bfd
->type_unit_groups
= allocate_type_unit_groups_table ();
7344 /* Do we need to create a new group, or can we use an existing one? */
7348 line_offset
= DW_UNSND (stmt_list
);
7349 ++tu_stats
->nr_symtab_sharers
;
7353 /* Ugh, no stmt_list. Rare, but we have to handle it.
7354 We can do various things here like create one group per TU or
7355 spread them over multiple groups to split up the expansion work.
7356 To avoid worst case scenarios (too many groups or too large groups)
7357 we, umm, group them in bunches. */
7358 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7359 | (tu_stats
->nr_stmt_less_type_units
7360 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7361 ++tu_stats
->nr_stmt_less_type_units
;
7364 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7365 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7366 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7367 &type_unit_group_for_lookup
, INSERT
);
7370 tu_group
= (struct type_unit_group
*) *slot
;
7371 gdb_assert (tu_group
!= NULL
);
7375 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7376 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7378 ++tu_stats
->nr_symtabs
;
7384 /* Partial symbol tables. */
7386 /* Create a psymtab named NAME and assign it to PER_CU.
7388 The caller must fill in the following details:
7389 dirname, textlow, texthigh. */
7391 static dwarf2_psymtab
*
7392 create_partial_symtab (dwarf2_per_cu_data
*per_cu
,
7393 dwarf2_per_objfile
*per_objfile
,
7396 struct objfile
*objfile
= per_objfile
->objfile
;
7397 dwarf2_psymtab
*pst
;
7399 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7401 pst
->psymtabs_addrmap_supported
= true;
7403 /* This is the glue that links PST into GDB's symbol API. */
7404 per_cu
->v
.psymtab
= pst
;
7409 /* DIE reader function for process_psymtab_comp_unit. */
7412 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7413 const gdb_byte
*info_ptr
,
7414 struct die_info
*comp_unit_die
,
7415 enum language pretend_language
)
7417 struct dwarf2_cu
*cu
= reader
->cu
;
7418 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7419 struct objfile
*objfile
= per_objfile
->objfile
;
7420 struct gdbarch
*gdbarch
= objfile
->arch ();
7421 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7423 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7424 dwarf2_psymtab
*pst
;
7425 enum pc_bounds_kind cu_bounds_kind
;
7426 const char *filename
;
7428 gdb_assert (! per_cu
->is_debug_types
);
7430 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7432 /* Allocate a new partial symbol table structure. */
7433 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7434 static const char artificial
[] = "<artificial>";
7435 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7436 if (filename
== NULL
)
7438 else if (strcmp (filename
, artificial
) == 0)
7440 debug_filename
.reset (concat (artificial
, "@",
7441 sect_offset_str (per_cu
->sect_off
),
7443 filename
= debug_filename
.get ();
7446 pst
= create_partial_symtab (per_cu
, per_objfile
, filename
);
7448 /* This must be done before calling dwarf2_build_include_psymtabs. */
7449 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7451 baseaddr
= objfile
->text_section_offset ();
7453 dwarf2_find_base_address (comp_unit_die
, cu
);
7455 /* Possibly set the default values of LOWPC and HIGHPC from
7457 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7458 &best_highpc
, cu
, pst
);
7459 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7462 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7465 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7467 /* Store the contiguous range if it is not empty; it can be
7468 empty for CUs with no code. */
7469 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7473 /* Check if comp unit has_children.
7474 If so, read the rest of the partial symbols from this comp unit.
7475 If not, there's no more debug_info for this comp unit. */
7476 if (comp_unit_die
->has_children
)
7478 struct partial_die_info
*first_die
;
7479 CORE_ADDR lowpc
, highpc
;
7481 lowpc
= ((CORE_ADDR
) -1);
7482 highpc
= ((CORE_ADDR
) 0);
7484 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7486 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7487 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7489 /* If we didn't find a lowpc, set it to highpc to avoid
7490 complaints from `maint check'. */
7491 if (lowpc
== ((CORE_ADDR
) -1))
7494 /* If the compilation unit didn't have an explicit address range,
7495 then use the information extracted from its child dies. */
7496 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7499 best_highpc
= highpc
;
7502 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7503 best_lowpc
+ baseaddr
)
7505 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7506 best_highpc
+ baseaddr
)
7509 end_psymtab_common (objfile
, pst
);
7511 if (!cu
->per_cu
->imported_symtabs_empty ())
7514 int len
= cu
->per_cu
->imported_symtabs_size ();
7516 /* Fill in 'dependencies' here; we fill in 'users' in a
7518 pst
->number_of_dependencies
= len
;
7520 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7521 for (i
= 0; i
< len
; ++i
)
7523 pst
->dependencies
[i
]
7524 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7527 cu
->per_cu
->imported_symtabs_free ();
7530 /* Get the list of files included in the current compilation unit,
7531 and build a psymtab for each of them. */
7532 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7534 if (dwarf_read_debug
)
7535 fprintf_unfiltered (gdb_stdlog
,
7536 "Psymtab for %s unit @%s: %s - %s"
7537 ", %d global, %d static syms\n",
7538 per_cu
->is_debug_types
? "type" : "comp",
7539 sect_offset_str (per_cu
->sect_off
),
7540 paddress (gdbarch
, pst
->text_low (objfile
)),
7541 paddress (gdbarch
, pst
->text_high (objfile
)),
7542 pst
->n_global_syms
, pst
->n_static_syms
);
7545 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7546 Process compilation unit THIS_CU for a psymtab. */
7549 process_psymtab_comp_unit (dwarf2_per_cu_data
*this_cu
,
7550 dwarf2_per_objfile
*per_objfile
,
7551 bool want_partial_unit
,
7552 enum language pretend_language
)
7554 /* If this compilation unit was already read in, free the
7555 cached copy in order to read it in again. This is
7556 necessary because we skipped some symbols when we first
7557 read in the compilation unit (see load_partial_dies).
7558 This problem could be avoided, but the benefit is unclear. */
7559 if (this_cu
->cu
!= NULL
)
7560 free_one_cached_comp_unit (this_cu
, per_objfile
);
7562 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 0, false);
7564 switch (reader
.comp_unit_die
->tag
)
7566 case DW_TAG_compile_unit
:
7567 this_cu
->unit_type
= DW_UT_compile
;
7569 case DW_TAG_partial_unit
:
7570 this_cu
->unit_type
= DW_UT_partial
;
7580 else if (this_cu
->is_debug_types
)
7581 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7582 reader
.comp_unit_die
);
7583 else if (want_partial_unit
7584 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7585 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7586 reader
.comp_unit_die
,
7589 this_cu
->lang
= this_cu
->cu
->language
;
7591 /* Age out any secondary CUs. */
7592 age_cached_comp_units (per_objfile
);
7595 /* Reader function for build_type_psymtabs. */
7598 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7599 const gdb_byte
*info_ptr
,
7600 struct die_info
*type_unit_die
)
7602 struct dwarf2_per_objfile
*dwarf2_per_objfile
= reader
->cu
->per_objfile
;
7603 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7604 struct dwarf2_cu
*cu
= reader
->cu
;
7605 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7606 struct signatured_type
*sig_type
;
7607 struct type_unit_group
*tu_group
;
7608 struct attribute
*attr
;
7609 struct partial_die_info
*first_die
;
7610 CORE_ADDR lowpc
, highpc
;
7611 dwarf2_psymtab
*pst
;
7613 gdb_assert (per_cu
->is_debug_types
);
7614 sig_type
= (struct signatured_type
*) per_cu
;
7616 if (! type_unit_die
->has_children
)
7619 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7620 tu_group
= get_type_unit_group (cu
, attr
);
7622 if (tu_group
->tus
== nullptr)
7623 tu_group
->tus
= new std::vector
<signatured_type
*>;
7624 tu_group
->tus
->push_back (sig_type
);
7626 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7627 pst
= create_partial_symtab (per_cu
, dwarf2_per_objfile
, "");
7628 pst
->anonymous
= true;
7630 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7632 lowpc
= (CORE_ADDR
) -1;
7633 highpc
= (CORE_ADDR
) 0;
7634 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7636 end_psymtab_common (objfile
, pst
);
7639 /* Struct used to sort TUs by their abbreviation table offset. */
7641 struct tu_abbrev_offset
7643 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7644 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7647 signatured_type
*sig_type
;
7648 sect_offset abbrev_offset
;
7651 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7654 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7655 const struct tu_abbrev_offset
&b
)
7657 return a
.abbrev_offset
< b
.abbrev_offset
;
7660 /* Efficiently read all the type units.
7661 This does the bulk of the work for build_type_psymtabs.
7663 The efficiency is because we sort TUs by the abbrev table they use and
7664 only read each abbrev table once. In one program there are 200K TUs
7665 sharing 8K abbrev tables.
7667 The main purpose of this function is to support building the
7668 dwarf2_per_objfile->per_bfd->type_unit_groups table.
7669 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7670 can collapse the search space by grouping them by stmt_list.
7671 The savings can be significant, in the same program from above the 200K TUs
7672 share 8K stmt_list tables.
7674 FUNC is expected to call get_type_unit_group, which will create the
7675 struct type_unit_group if necessary and add it to
7676 dwarf2_per_objfile->per_bfd->type_unit_groups. */
7679 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7681 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7682 abbrev_table_up abbrev_table
;
7683 sect_offset abbrev_offset
;
7685 /* It's up to the caller to not call us multiple times. */
7686 gdb_assert (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
);
7688 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ())
7691 /* TUs typically share abbrev tables, and there can be way more TUs than
7692 abbrev tables. Sort by abbrev table to reduce the number of times we
7693 read each abbrev table in.
7694 Alternatives are to punt or to maintain a cache of abbrev tables.
7695 This is simpler and efficient enough for now.
7697 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7698 symtab to use). Typically TUs with the same abbrev offset have the same
7699 stmt_list value too so in practice this should work well.
7701 The basic algorithm here is:
7703 sort TUs by abbrev table
7704 for each TU with same abbrev table:
7705 read abbrev table if first user
7706 read TU top level DIE
7707 [IWBN if DWO skeletons had DW_AT_stmt_list]
7710 if (dwarf_read_debug
)
7711 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7713 /* Sort in a separate table to maintain the order of all_type_units
7714 for .gdb_index: TU indices directly index all_type_units. */
7715 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7716 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7718 for (signatured_type
*sig_type
: dwarf2_per_objfile
->per_bfd
->all_type_units
)
7719 sorted_by_abbrev
.emplace_back
7720 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7721 sig_type
->per_cu
.section
,
7722 sig_type
->per_cu
.sect_off
));
7724 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7725 sort_tu_by_abbrev_offset
);
7727 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7729 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7731 /* Switch to the next abbrev table if necessary. */
7732 if (abbrev_table
== NULL
7733 || tu
.abbrev_offset
!= abbrev_offset
)
7735 abbrev_offset
= tu
.abbrev_offset
;
7737 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7738 &dwarf2_per_objfile
->per_bfd
->abbrev
,
7740 ++tu_stats
->nr_uniq_abbrev_tables
;
7743 cutu_reader
reader (&tu
.sig_type
->per_cu
, dwarf2_per_objfile
,
7744 abbrev_table
.get (), 0, false);
7745 if (!reader
.dummy_p
)
7746 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7747 reader
.comp_unit_die
);
7751 /* Print collected type unit statistics. */
7754 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7756 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7758 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7759 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7760 dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7761 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7762 tu_stats
->nr_uniq_abbrev_tables
);
7763 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7764 tu_stats
->nr_symtabs
);
7765 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7766 tu_stats
->nr_symtab_sharers
);
7767 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7768 tu_stats
->nr_stmt_less_type_units
);
7769 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7770 tu_stats
->nr_all_type_units_reallocs
);
7773 /* Traversal function for build_type_psymtabs. */
7776 build_type_psymtab_dependencies (void **slot
, void *info
)
7778 struct dwarf2_per_objfile
*dwarf2_per_objfile
7779 = (struct dwarf2_per_objfile
*) info
;
7780 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7781 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7782 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7783 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7784 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7787 gdb_assert (len
> 0);
7788 gdb_assert (per_cu
->type_unit_group_p ());
7790 pst
->number_of_dependencies
= len
;
7791 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7792 for (i
= 0; i
< len
; ++i
)
7794 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7795 gdb_assert (iter
->per_cu
.is_debug_types
);
7796 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7797 iter
->type_unit_group
= tu_group
;
7800 delete tu_group
->tus
;
7801 tu_group
->tus
= nullptr;
7806 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7807 Build partial symbol tables for the .debug_types comp-units. */
7810 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7812 if (! create_all_type_units (dwarf2_per_objfile
))
7815 build_type_psymtabs_1 (dwarf2_per_objfile
);
7818 /* Traversal function for process_skeletonless_type_unit.
7819 Read a TU in a DWO file and build partial symbols for it. */
7822 process_skeletonless_type_unit (void **slot
, void *info
)
7824 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7825 struct dwarf2_per_objfile
*dwarf2_per_objfile
7826 = (struct dwarf2_per_objfile
*) info
;
7827 struct signatured_type find_entry
, *entry
;
7829 /* If this TU doesn't exist in the global table, add it and read it in. */
7831 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
7832 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
7834 find_entry
.signature
= dwo_unit
->signature
;
7835 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
7836 &find_entry
, INSERT
);
7837 /* If we've already seen this type there's nothing to do. What's happening
7838 is we're doing our own version of comdat-folding here. */
7842 /* This does the job that create_all_type_units would have done for
7844 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7845 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7848 /* This does the job that build_type_psymtabs_1 would have done. */
7849 cutu_reader
reader (&entry
->per_cu
, dwarf2_per_objfile
, NULL
, 0, false);
7850 if (!reader
.dummy_p
)
7851 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7852 reader
.comp_unit_die
);
7857 /* Traversal function for process_skeletonless_type_units. */
7860 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7862 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7864 if (dwo_file
->tus
!= NULL
)
7865 htab_traverse_noresize (dwo_file
->tus
.get (),
7866 process_skeletonless_type_unit
, info
);
7871 /* Scan all TUs of DWO files, verifying we've processed them.
7872 This is needed in case a TU was emitted without its skeleton.
7873 Note: This can't be done until we know what all the DWO files are. */
7876 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7878 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7879 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7880 && dwarf2_per_objfile
->per_bfd
->dwo_files
!= NULL
)
7882 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (),
7883 process_dwo_file_for_skeletonless_type_units
,
7884 dwarf2_per_objfile
);
7888 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7891 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7893 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7895 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7900 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7902 /* Set the 'user' field only if it is not already set. */
7903 if (pst
->dependencies
[j
]->user
== NULL
)
7904 pst
->dependencies
[j
]->user
= pst
;
7909 /* Build the partial symbol table by doing a quick pass through the
7910 .debug_info and .debug_abbrev sections. */
7913 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7915 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7917 if (dwarf_read_debug
)
7919 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7920 objfile_name (objfile
));
7923 scoped_restore restore_reading_psyms
7924 = make_scoped_restore (&dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
,
7927 dwarf2_per_objfile
->per_bfd
->info
.read (objfile
);
7929 /* Any cached compilation units will be linked by the per-objfile
7930 read_in_chain. Make sure to free them when we're done. */
7931 free_cached_comp_units
freer (dwarf2_per_objfile
);
7933 build_type_psymtabs (dwarf2_per_objfile
);
7935 create_all_comp_units (dwarf2_per_objfile
);
7937 /* Create a temporary address map on a temporary obstack. We later
7938 copy this to the final obstack. */
7939 auto_obstack temp_obstack
;
7941 scoped_restore save_psymtabs_addrmap
7942 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7943 addrmap_create_mutable (&temp_obstack
));
7945 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7947 if (per_cu
->v
.psymtab
!= NULL
)
7948 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7950 process_psymtab_comp_unit (per_cu
, dwarf2_per_objfile
, false,
7954 /* This has to wait until we read the CUs, we need the list of DWOs. */
7955 process_skeletonless_type_units (dwarf2_per_objfile
);
7957 /* Now that all TUs have been processed we can fill in the dependencies. */
7958 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
!= NULL
)
7960 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7961 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7964 if (dwarf_read_debug
)
7965 print_tu_stats (dwarf2_per_objfile
);
7967 set_partial_user (dwarf2_per_objfile
);
7969 objfile
->partial_symtabs
->psymtabs_addrmap
7970 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7971 objfile
->partial_symtabs
->obstack ());
7972 /* At this point we want to keep the address map. */
7973 save_psymtabs_addrmap
.release ();
7975 if (dwarf_read_debug
)
7976 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7977 objfile_name (objfile
));
7980 /* Load the partial DIEs for a secondary CU into memory.
7981 This is also used when rereading a primary CU with load_all_dies. */
7984 load_partial_comp_unit (dwarf2_per_cu_data
*this_cu
,
7985 dwarf2_per_objfile
*per_objfile
)
7987 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 1, false);
7989 if (!reader
.dummy_p
)
7991 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7994 /* Check if comp unit has_children.
7995 If so, read the rest of the partial symbols from this comp unit.
7996 If not, there's no more debug_info for this comp unit. */
7997 if (reader
.comp_unit_die
->has_children
)
7998 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8005 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8006 struct dwarf2_section_info
*section
,
8007 struct dwarf2_section_info
*abbrev_section
,
8008 unsigned int is_dwz
)
8010 const gdb_byte
*info_ptr
;
8011 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8013 if (dwarf_read_debug
)
8014 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8015 section
->get_name (),
8016 section
->get_file_name ());
8018 section
->read (objfile
);
8020 info_ptr
= section
->buffer
;
8022 while (info_ptr
< section
->buffer
+ section
->size
)
8024 struct dwarf2_per_cu_data
*this_cu
;
8026 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8028 comp_unit_head cu_header
;
8029 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8030 abbrev_section
, info_ptr
,
8031 rcuh_kind::COMPILE
);
8033 /* Save the compilation unit for later lookup. */
8034 if (cu_header
.unit_type
!= DW_UT_type
)
8035 this_cu
= dwarf2_per_objfile
->per_bfd
->allocate_per_cu ();
8038 auto sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
8039 sig_type
->signature
= cu_header
.signature
;
8040 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8041 this_cu
= &sig_type
->per_cu
;
8043 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8044 this_cu
->sect_off
= sect_off
;
8045 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8046 this_cu
->is_dwz
= is_dwz
;
8047 this_cu
->section
= section
;
8049 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (this_cu
);
8051 info_ptr
= info_ptr
+ this_cu
->length
;
8055 /* Create a list of all compilation units in OBJFILE.
8056 This is only done for -readnow and building partial symtabs. */
8059 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8061 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
8062 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->per_bfd
->info
,
8063 &dwarf2_per_objfile
->per_bfd
->abbrev
, 0);
8065 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
8067 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8071 /* Process all loaded DIEs for compilation unit CU, starting at
8072 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8073 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8074 DW_AT_ranges). See the comments of add_partial_subprogram on how
8075 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8078 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8079 CORE_ADDR
*highpc
, int set_addrmap
,
8080 struct dwarf2_cu
*cu
)
8082 struct partial_die_info
*pdi
;
8084 /* Now, march along the PDI's, descending into ones which have
8085 interesting children but skipping the children of the other ones,
8086 until we reach the end of the compilation unit. */
8094 /* Anonymous namespaces or modules have no name but have interesting
8095 children, so we need to look at them. Ditto for anonymous
8098 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8099 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8100 || pdi
->tag
== DW_TAG_imported_unit
8101 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8105 case DW_TAG_subprogram
:
8106 case DW_TAG_inlined_subroutine
:
8107 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8109 case DW_TAG_constant
:
8110 case DW_TAG_variable
:
8111 case DW_TAG_typedef
:
8112 case DW_TAG_union_type
:
8113 if (!pdi
->is_declaration
8114 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8116 add_partial_symbol (pdi
, cu
);
8119 case DW_TAG_class_type
:
8120 case DW_TAG_interface_type
:
8121 case DW_TAG_structure_type
:
8122 if (!pdi
->is_declaration
)
8124 add_partial_symbol (pdi
, cu
);
8126 if ((cu
->language
== language_rust
8127 || cu
->language
== language_cplus
) && pdi
->has_children
)
8128 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8131 case DW_TAG_enumeration_type
:
8132 if (!pdi
->is_declaration
)
8133 add_partial_enumeration (pdi
, cu
);
8135 case DW_TAG_base_type
:
8136 case DW_TAG_subrange_type
:
8137 /* File scope base type definitions are added to the partial
8139 add_partial_symbol (pdi
, cu
);
8141 case DW_TAG_namespace
:
8142 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8145 if (!pdi
->is_declaration
)
8146 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8148 case DW_TAG_imported_unit
:
8150 struct dwarf2_per_cu_data
*per_cu
;
8152 /* For now we don't handle imported units in type units. */
8153 if (cu
->per_cu
->is_debug_types
)
8155 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8156 " supported in type units [in module %s]"),
8157 objfile_name (cu
->per_objfile
->objfile
));
8160 per_cu
= dwarf2_find_containing_comp_unit
8161 (pdi
->d
.sect_off
, pdi
->is_dwz
, cu
->per_objfile
);
8163 /* Go read the partial unit, if needed. */
8164 if (per_cu
->v
.psymtab
== NULL
)
8165 process_psymtab_comp_unit (per_cu
, cu
->per_objfile
, true,
8168 cu
->per_cu
->imported_symtabs_push (per_cu
);
8171 case DW_TAG_imported_declaration
:
8172 add_partial_symbol (pdi
, cu
);
8179 /* If the die has a sibling, skip to the sibling. */
8181 pdi
= pdi
->die_sibling
;
8185 /* Functions used to compute the fully scoped name of a partial DIE.
8187 Normally, this is simple. For C++, the parent DIE's fully scoped
8188 name is concatenated with "::" and the partial DIE's name.
8189 Enumerators are an exception; they use the scope of their parent
8190 enumeration type, i.e. the name of the enumeration type is not
8191 prepended to the enumerator.
8193 There are two complexities. One is DW_AT_specification; in this
8194 case "parent" means the parent of the target of the specification,
8195 instead of the direct parent of the DIE. The other is compilers
8196 which do not emit DW_TAG_namespace; in this case we try to guess
8197 the fully qualified name of structure types from their members'
8198 linkage names. This must be done using the DIE's children rather
8199 than the children of any DW_AT_specification target. We only need
8200 to do this for structures at the top level, i.e. if the target of
8201 any DW_AT_specification (if any; otherwise the DIE itself) does not
8204 /* Compute the scope prefix associated with PDI's parent, in
8205 compilation unit CU. The result will be allocated on CU's
8206 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8207 field. NULL is returned if no prefix is necessary. */
8209 partial_die_parent_scope (struct partial_die_info
*pdi
,
8210 struct dwarf2_cu
*cu
)
8212 const char *grandparent_scope
;
8213 struct partial_die_info
*parent
, *real_pdi
;
8215 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8216 then this means the parent of the specification DIE. */
8219 while (real_pdi
->has_specification
)
8221 auto res
= find_partial_die (real_pdi
->spec_offset
,
8222 real_pdi
->spec_is_dwz
, cu
);
8227 parent
= real_pdi
->die_parent
;
8231 if (parent
->scope_set
)
8232 return parent
->scope
;
8236 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8238 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8239 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8240 Work around this problem here. */
8241 if (cu
->language
== language_cplus
8242 && parent
->tag
== DW_TAG_namespace
8243 && strcmp (parent
->name
, "::") == 0
8244 && grandparent_scope
== NULL
)
8246 parent
->scope
= NULL
;
8247 parent
->scope_set
= 1;
8251 /* Nested subroutines in Fortran get a prefix. */
8252 if (pdi
->tag
== DW_TAG_enumerator
)
8253 /* Enumerators should not get the name of the enumeration as a prefix. */
8254 parent
->scope
= grandparent_scope
;
8255 else if (parent
->tag
== DW_TAG_namespace
8256 || parent
->tag
== DW_TAG_module
8257 || parent
->tag
== DW_TAG_structure_type
8258 || parent
->tag
== DW_TAG_class_type
8259 || parent
->tag
== DW_TAG_interface_type
8260 || parent
->tag
== DW_TAG_union_type
8261 || parent
->tag
== DW_TAG_enumeration_type
8262 || (cu
->language
== language_fortran
8263 && parent
->tag
== DW_TAG_subprogram
8264 && pdi
->tag
== DW_TAG_subprogram
))
8266 if (grandparent_scope
== NULL
)
8267 parent
->scope
= parent
->name
;
8269 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8271 parent
->name
, 0, cu
);
8275 /* FIXME drow/2004-04-01: What should we be doing with
8276 function-local names? For partial symbols, we should probably be
8278 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8279 dwarf_tag_name (parent
->tag
),
8280 sect_offset_str (pdi
->sect_off
));
8281 parent
->scope
= grandparent_scope
;
8284 parent
->scope_set
= 1;
8285 return parent
->scope
;
8288 /* Return the fully scoped name associated with PDI, from compilation unit
8289 CU. The result will be allocated with malloc. */
8291 static gdb::unique_xmalloc_ptr
<char>
8292 partial_die_full_name (struct partial_die_info
*pdi
,
8293 struct dwarf2_cu
*cu
)
8295 const char *parent_scope
;
8297 /* If this is a template instantiation, we can not work out the
8298 template arguments from partial DIEs. So, unfortunately, we have
8299 to go through the full DIEs. At least any work we do building
8300 types here will be reused if full symbols are loaded later. */
8301 if (pdi
->has_template_arguments
)
8305 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8307 struct die_info
*die
;
8308 struct attribute attr
;
8309 struct dwarf2_cu
*ref_cu
= cu
;
8311 /* DW_FORM_ref_addr is using section offset. */
8312 attr
.name
= (enum dwarf_attribute
) 0;
8313 attr
.form
= DW_FORM_ref_addr
;
8314 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8315 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8317 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8321 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8322 if (parent_scope
== NULL
)
8325 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8330 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8332 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
8333 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8334 struct gdbarch
*gdbarch
= objfile
->arch ();
8336 const char *actual_name
= NULL
;
8339 baseaddr
= objfile
->text_section_offset ();
8341 gdb::unique_xmalloc_ptr
<char> built_actual_name
8342 = partial_die_full_name (pdi
, cu
);
8343 if (built_actual_name
!= NULL
)
8344 actual_name
= built_actual_name
.get ();
8346 if (actual_name
== NULL
)
8347 actual_name
= pdi
->name
;
8349 partial_symbol psymbol
;
8350 memset (&psymbol
, 0, sizeof (psymbol
));
8351 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8352 psymbol
.ginfo
.section
= -1;
8354 /* The code below indicates that the psymbol should be installed by
8356 gdb::optional
<psymbol_placement
> where
;
8360 case DW_TAG_inlined_subroutine
:
8361 case DW_TAG_subprogram
:
8362 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8364 if (pdi
->is_external
8365 || cu
->language
== language_ada
8366 || (cu
->language
== language_fortran
8367 && pdi
->die_parent
!= NULL
8368 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8370 /* Normally, only "external" DIEs are part of the global scope.
8371 But in Ada and Fortran, we want to be able to access nested
8372 procedures globally. So all Ada and Fortran subprograms are
8373 stored in the global scope. */
8374 where
= psymbol_placement::GLOBAL
;
8377 where
= psymbol_placement::STATIC
;
8379 psymbol
.domain
= VAR_DOMAIN
;
8380 psymbol
.aclass
= LOC_BLOCK
;
8381 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8382 psymbol
.ginfo
.value
.address
= addr
;
8384 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8385 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8387 case DW_TAG_constant
:
8388 psymbol
.domain
= VAR_DOMAIN
;
8389 psymbol
.aclass
= LOC_STATIC
;
8390 where
= (pdi
->is_external
8391 ? psymbol_placement::GLOBAL
8392 : psymbol_placement::STATIC
);
8394 case DW_TAG_variable
:
8396 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8400 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
8402 /* A global or static variable may also have been stripped
8403 out by the linker if unused, in which case its address
8404 will be nullified; do not add such variables into partial
8405 symbol table then. */
8407 else if (pdi
->is_external
)
8410 Don't enter into the minimal symbol tables as there is
8411 a minimal symbol table entry from the ELF symbols already.
8412 Enter into partial symbol table if it has a location
8413 descriptor or a type.
8414 If the location descriptor is missing, new_symbol will create
8415 a LOC_UNRESOLVED symbol, the address of the variable will then
8416 be determined from the minimal symbol table whenever the variable
8418 The address for the partial symbol table entry is not
8419 used by GDB, but it comes in handy for debugging partial symbol
8422 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8424 psymbol
.domain
= VAR_DOMAIN
;
8425 psymbol
.aclass
= LOC_STATIC
;
8426 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8427 psymbol
.ginfo
.value
.address
= addr
;
8428 where
= psymbol_placement::GLOBAL
;
8433 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8435 /* Static Variable. Skip symbols whose value we cannot know (those
8436 without location descriptors or constant values). */
8437 if (!has_loc
&& !pdi
->has_const_value
)
8440 psymbol
.domain
= VAR_DOMAIN
;
8441 psymbol
.aclass
= LOC_STATIC
;
8442 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8444 psymbol
.ginfo
.value
.address
= addr
;
8445 where
= psymbol_placement::STATIC
;
8448 case DW_TAG_typedef
:
8449 case DW_TAG_base_type
:
8450 case DW_TAG_subrange_type
:
8451 psymbol
.domain
= VAR_DOMAIN
;
8452 psymbol
.aclass
= LOC_TYPEDEF
;
8453 where
= psymbol_placement::STATIC
;
8455 case DW_TAG_imported_declaration
:
8456 case DW_TAG_namespace
:
8457 psymbol
.domain
= VAR_DOMAIN
;
8458 psymbol
.aclass
= LOC_TYPEDEF
;
8459 where
= psymbol_placement::GLOBAL
;
8462 /* With Fortran 77 there might be a "BLOCK DATA" module
8463 available without any name. If so, we skip the module as it
8464 doesn't bring any value. */
8465 if (actual_name
!= nullptr)
8467 psymbol
.domain
= MODULE_DOMAIN
;
8468 psymbol
.aclass
= LOC_TYPEDEF
;
8469 where
= psymbol_placement::GLOBAL
;
8472 case DW_TAG_class_type
:
8473 case DW_TAG_interface_type
:
8474 case DW_TAG_structure_type
:
8475 case DW_TAG_union_type
:
8476 case DW_TAG_enumeration_type
:
8477 /* Skip external references. The DWARF standard says in the section
8478 about "Structure, Union, and Class Type Entries": "An incomplete
8479 structure, union or class type is represented by a structure,
8480 union or class entry that does not have a byte size attribute
8481 and that has a DW_AT_declaration attribute." */
8482 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8485 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8486 static vs. global. */
8487 psymbol
.domain
= STRUCT_DOMAIN
;
8488 psymbol
.aclass
= LOC_TYPEDEF
;
8489 where
= (cu
->language
== language_cplus
8490 ? psymbol_placement::GLOBAL
8491 : psymbol_placement::STATIC
);
8493 case DW_TAG_enumerator
:
8494 psymbol
.domain
= VAR_DOMAIN
;
8495 psymbol
.aclass
= LOC_CONST
;
8496 where
= (cu
->language
== language_cplus
8497 ? psymbol_placement::GLOBAL
8498 : psymbol_placement::STATIC
);
8504 if (where
.has_value ())
8506 if (built_actual_name
!= nullptr)
8507 actual_name
= objfile
->intern (actual_name
);
8508 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8509 psymbol
.ginfo
.set_linkage_name (actual_name
);
8512 psymbol
.ginfo
.set_demangled_name (actual_name
,
8513 &objfile
->objfile_obstack
);
8514 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8516 add_psymbol_to_list (psymbol
, *where
, objfile
);
8520 /* Read a partial die corresponding to a namespace; also, add a symbol
8521 corresponding to that namespace to the symbol table. NAMESPACE is
8522 the name of the enclosing namespace. */
8525 add_partial_namespace (struct partial_die_info
*pdi
,
8526 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8527 int set_addrmap
, struct dwarf2_cu
*cu
)
8529 /* Add a symbol for the namespace. */
8531 add_partial_symbol (pdi
, cu
);
8533 /* Now scan partial symbols in that namespace. */
8535 if (pdi
->has_children
)
8536 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8539 /* Read a partial die corresponding to a Fortran module. */
8542 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8543 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8545 /* Add a symbol for the namespace. */
8547 add_partial_symbol (pdi
, cu
);
8549 /* Now scan partial symbols in that module. */
8551 if (pdi
->has_children
)
8552 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8555 /* Read a partial die corresponding to a subprogram or an inlined
8556 subprogram and create a partial symbol for that subprogram.
8557 When the CU language allows it, this routine also defines a partial
8558 symbol for each nested subprogram that this subprogram contains.
8559 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8560 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8562 PDI may also be a lexical block, in which case we simply search
8563 recursively for subprograms defined inside that lexical block.
8564 Again, this is only performed when the CU language allows this
8565 type of definitions. */
8568 add_partial_subprogram (struct partial_die_info
*pdi
,
8569 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8570 int set_addrmap
, struct dwarf2_cu
*cu
)
8572 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8574 if (pdi
->has_pc_info
)
8576 if (pdi
->lowpc
< *lowpc
)
8577 *lowpc
= pdi
->lowpc
;
8578 if (pdi
->highpc
> *highpc
)
8579 *highpc
= pdi
->highpc
;
8582 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
8583 struct gdbarch
*gdbarch
= objfile
->arch ();
8585 CORE_ADDR this_highpc
;
8586 CORE_ADDR this_lowpc
;
8588 baseaddr
= objfile
->text_section_offset ();
8590 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8591 pdi
->lowpc
+ baseaddr
)
8594 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8595 pdi
->highpc
+ baseaddr
)
8597 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8598 this_lowpc
, this_highpc
- 1,
8599 cu
->per_cu
->v
.psymtab
);
8603 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8605 if (!pdi
->is_declaration
)
8606 /* Ignore subprogram DIEs that do not have a name, they are
8607 illegal. Do not emit a complaint at this point, we will
8608 do so when we convert this psymtab into a symtab. */
8610 add_partial_symbol (pdi
, cu
);
8614 if (! pdi
->has_children
)
8617 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8619 pdi
= pdi
->die_child
;
8623 if (pdi
->tag
== DW_TAG_subprogram
8624 || pdi
->tag
== DW_TAG_inlined_subroutine
8625 || pdi
->tag
== DW_TAG_lexical_block
)
8626 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8627 pdi
= pdi
->die_sibling
;
8632 /* Read a partial die corresponding to an enumeration type. */
8635 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8636 struct dwarf2_cu
*cu
)
8638 struct partial_die_info
*pdi
;
8640 if (enum_pdi
->name
!= NULL
)
8641 add_partial_symbol (enum_pdi
, cu
);
8643 pdi
= enum_pdi
->die_child
;
8646 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8647 complaint (_("malformed enumerator DIE ignored"));
8649 add_partial_symbol (pdi
, cu
);
8650 pdi
= pdi
->die_sibling
;
8654 /* Return the initial uleb128 in the die at INFO_PTR. */
8657 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8659 unsigned int bytes_read
;
8661 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8664 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8665 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8667 Return the corresponding abbrev, or NULL if the number is zero (indicating
8668 an empty DIE). In either case *BYTES_READ will be set to the length of
8669 the initial number. */
8671 static struct abbrev_info
*
8672 peek_die_abbrev (const die_reader_specs
&reader
,
8673 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8675 dwarf2_cu
*cu
= reader
.cu
;
8676 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
8677 unsigned int abbrev_number
8678 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8680 if (abbrev_number
== 0)
8683 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8686 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8687 " at offset %s [in module %s]"),
8688 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8689 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8695 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8696 Returns a pointer to the end of a series of DIEs, terminated by an empty
8697 DIE. Any children of the skipped DIEs will also be skipped. */
8699 static const gdb_byte
*
8700 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8704 unsigned int bytes_read
;
8705 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8708 return info_ptr
+ bytes_read
;
8710 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8714 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8715 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8716 abbrev corresponding to that skipped uleb128 should be passed in
8717 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8720 static const gdb_byte
*
8721 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8722 struct abbrev_info
*abbrev
)
8724 unsigned int bytes_read
;
8725 struct attribute attr
;
8726 bfd
*abfd
= reader
->abfd
;
8727 struct dwarf2_cu
*cu
= reader
->cu
;
8728 const gdb_byte
*buffer
= reader
->buffer
;
8729 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8730 unsigned int form
, i
;
8732 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8734 /* The only abbrev we care about is DW_AT_sibling. */
8735 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8738 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8740 if (attr
.form
== DW_FORM_ref_addr
)
8741 complaint (_("ignoring absolute DW_AT_sibling"));
8744 sect_offset off
= attr
.get_ref_die_offset ();
8745 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8747 if (sibling_ptr
< info_ptr
)
8748 complaint (_("DW_AT_sibling points backwards"));
8749 else if (sibling_ptr
> reader
->buffer_end
)
8750 reader
->die_section
->overflow_complaint ();
8756 /* If it isn't DW_AT_sibling, skip this attribute. */
8757 form
= abbrev
->attrs
[i
].form
;
8761 case DW_FORM_ref_addr
:
8762 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8763 and later it is offset sized. */
8764 if (cu
->header
.version
== 2)
8765 info_ptr
+= cu
->header
.addr_size
;
8767 info_ptr
+= cu
->header
.offset_size
;
8769 case DW_FORM_GNU_ref_alt
:
8770 info_ptr
+= cu
->header
.offset_size
;
8773 info_ptr
+= cu
->header
.addr_size
;
8781 case DW_FORM_flag_present
:
8782 case DW_FORM_implicit_const
:
8799 case DW_FORM_ref_sig8
:
8802 case DW_FORM_data16
:
8805 case DW_FORM_string
:
8806 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8807 info_ptr
+= bytes_read
;
8809 case DW_FORM_sec_offset
:
8811 case DW_FORM_GNU_strp_alt
:
8812 info_ptr
+= cu
->header
.offset_size
;
8814 case DW_FORM_exprloc
:
8816 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8817 info_ptr
+= bytes_read
;
8819 case DW_FORM_block1
:
8820 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8822 case DW_FORM_block2
:
8823 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8825 case DW_FORM_block4
:
8826 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8832 case DW_FORM_ref_udata
:
8833 case DW_FORM_GNU_addr_index
:
8834 case DW_FORM_GNU_str_index
:
8835 case DW_FORM_rnglistx
:
8836 case DW_FORM_loclistx
:
8837 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8839 case DW_FORM_indirect
:
8840 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8841 info_ptr
+= bytes_read
;
8842 /* We need to continue parsing from here, so just go back to
8844 goto skip_attribute
;
8847 error (_("Dwarf Error: Cannot handle %s "
8848 "in DWARF reader [in module %s]"),
8849 dwarf_form_name (form
),
8850 bfd_get_filename (abfd
));
8854 if (abbrev
->has_children
)
8855 return skip_children (reader
, info_ptr
);
8860 /* Locate ORIG_PDI's sibling.
8861 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8863 static const gdb_byte
*
8864 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8865 struct partial_die_info
*orig_pdi
,
8866 const gdb_byte
*info_ptr
)
8868 /* Do we know the sibling already? */
8870 if (orig_pdi
->sibling
)
8871 return orig_pdi
->sibling
;
8873 /* Are there any children to deal with? */
8875 if (!orig_pdi
->has_children
)
8878 /* Skip the children the long way. */
8880 return skip_children (reader
, info_ptr
);
8883 /* Expand this partial symbol table into a full symbol table. SELF is
8887 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8889 struct dwarf2_per_objfile
*dwarf2_per_objfile
8890 = get_dwarf2_per_objfile (objfile
);
8892 gdb_assert (!dwarf2_per_objfile
->symtab_set_p (per_cu_data
));
8894 /* If this psymtab is constructed from a debug-only objfile, the
8895 has_section_at_zero flag will not necessarily be correct. We
8896 can get the correct value for this flag by looking at the data
8897 associated with the (presumably stripped) associated objfile. */
8898 if (objfile
->separate_debug_objfile_backlink
)
8900 struct dwarf2_per_objfile
*dpo_backlink
8901 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8903 dwarf2_per_objfile
->per_bfd
->has_section_at_zero
8904 = dpo_backlink
->per_bfd
->has_section_at_zero
;
8907 expand_psymtab (objfile
);
8909 process_cu_includes (dwarf2_per_objfile
);
8912 /* Reading in full CUs. */
8914 /* Add PER_CU to the queue. */
8917 queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
8918 dwarf2_per_objfile
*per_objfile
,
8919 enum language pretend_language
)
8922 per_cu
->per_bfd
->queue
.emplace (per_cu
, per_objfile
, pretend_language
);
8925 /* If PER_CU is not yet queued, add it to the queue.
8926 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8928 The result is non-zero if PER_CU was queued, otherwise the result is zero
8929 meaning either PER_CU is already queued or it is already loaded.
8931 N.B. There is an invariant here that if a CU is queued then it is loaded.
8932 The caller is required to load PER_CU if we return non-zero. */
8935 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8936 dwarf2_per_cu_data
*per_cu
,
8937 dwarf2_per_objfile
*per_objfile
,
8938 enum language pretend_language
)
8940 /* We may arrive here during partial symbol reading, if we need full
8941 DIEs to process an unusual case (e.g. template arguments). Do
8942 not queue PER_CU, just tell our caller to load its DIEs. */
8943 if (per_cu
->per_bfd
->reading_partial_symbols
)
8945 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8950 /* Mark the dependence relation so that we don't flush PER_CU
8952 if (dependent_cu
!= NULL
)
8953 dwarf2_add_dependence (dependent_cu
, per_cu
);
8955 /* If it's already on the queue, we have nothing to do. */
8959 /* If the compilation unit is already loaded, just mark it as
8961 if (per_cu
->cu
!= NULL
)
8963 per_cu
->cu
->last_used
= 0;
8967 /* Add it to the queue. */
8968 queue_comp_unit (per_cu
, per_objfile
, pretend_language
);
8973 /* Process the queue. */
8976 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8978 if (dwarf_read_debug
)
8980 fprintf_unfiltered (gdb_stdlog
,
8981 "Expanding one or more symtabs of objfile %s ...\n",
8982 objfile_name (dwarf2_per_objfile
->objfile
));
8985 /* The queue starts out with one item, but following a DIE reference
8986 may load a new CU, adding it to the end of the queue. */
8987 while (!dwarf2_per_objfile
->per_bfd
->queue
.empty ())
8989 dwarf2_queue_item
&item
= dwarf2_per_objfile
->per_bfd
->queue
.front ();
8991 if (!dwarf2_per_objfile
->symtab_set_p (item
.per_cu
)
8992 /* Skip dummy CUs. */
8993 && item
.per_cu
->cu
!= NULL
)
8995 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8996 unsigned int debug_print_threshold
;
8999 if (per_cu
->is_debug_types
)
9001 struct signatured_type
*sig_type
=
9002 (struct signatured_type
*) per_cu
;
9004 sprintf (buf
, "TU %s at offset %s",
9005 hex_string (sig_type
->signature
),
9006 sect_offset_str (per_cu
->sect_off
));
9007 /* There can be 100s of TUs.
9008 Only print them in verbose mode. */
9009 debug_print_threshold
= 2;
9013 sprintf (buf
, "CU at offset %s",
9014 sect_offset_str (per_cu
->sect_off
));
9015 debug_print_threshold
= 1;
9018 if (dwarf_read_debug
>= debug_print_threshold
)
9019 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9021 if (per_cu
->is_debug_types
)
9022 process_full_type_unit (per_cu
->cu
, item
.pretend_language
);
9024 process_full_comp_unit (per_cu
->cu
, item
.pretend_language
);
9026 if (dwarf_read_debug
>= debug_print_threshold
)
9027 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9030 item
.per_cu
->queued
= 0;
9031 dwarf2_per_objfile
->per_bfd
->queue
.pop ();
9034 if (dwarf_read_debug
)
9036 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9037 objfile_name (dwarf2_per_objfile
->objfile
));
9041 /* Read in full symbols for PST, and anything it depends on. */
9044 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9046 gdb_assert (!readin_p (objfile
));
9048 expand_dependencies (objfile
);
9050 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9051 dw2_do_instantiate_symtab (per_cu_data
, per_objfile
, false);
9052 gdb_assert (get_compunit_symtab (objfile
) != nullptr);
9055 /* See psympriv.h. */
9058 dwarf2_psymtab::readin_p (struct objfile
*objfile
) const
9060 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9061 return per_objfile
->symtab_set_p (per_cu_data
);
9064 /* See psympriv.h. */
9067 dwarf2_psymtab::get_compunit_symtab (struct objfile
*objfile
) const
9069 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9070 return per_objfile
->get_symtab (per_cu_data
);
9073 /* Trivial hash function for die_info: the hash value of a DIE
9074 is its offset in .debug_info for this objfile. */
9077 die_hash (const void *item
)
9079 const struct die_info
*die
= (const struct die_info
*) item
;
9081 return to_underlying (die
->sect_off
);
9084 /* Trivial comparison function for die_info structures: two DIEs
9085 are equal if they have the same offset. */
9088 die_eq (const void *item_lhs
, const void *item_rhs
)
9090 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9091 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9093 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9096 /* Load the DIEs associated with PER_CU into memory. */
9099 load_full_comp_unit (dwarf2_per_cu_data
*this_cu
,
9100 dwarf2_per_objfile
*per_objfile
,
9102 enum language pretend_language
)
9104 gdb_assert (! this_cu
->is_debug_types
);
9106 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 1, skip_partial
);
9110 struct dwarf2_cu
*cu
= reader
.cu
;
9111 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9113 gdb_assert (cu
->die_hash
== NULL
);
9115 htab_create_alloc_ex (cu
->header
.length
/ 12,
9119 &cu
->comp_unit_obstack
,
9120 hashtab_obstack_allocate
,
9121 dummy_obstack_deallocate
);
9123 if (reader
.comp_unit_die
->has_children
)
9124 reader
.comp_unit_die
->child
9125 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9126 &info_ptr
, reader
.comp_unit_die
);
9127 cu
->dies
= reader
.comp_unit_die
;
9128 /* comp_unit_die is not stored in die_hash, no need. */
9130 /* We try not to read any attributes in this function, because not
9131 all CUs needed for references have been loaded yet, and symbol
9132 table processing isn't initialized. But we have to set the CU language,
9133 or we won't be able to build types correctly.
9134 Similarly, if we do not read the producer, we can not apply
9135 producer-specific interpretation. */
9136 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9141 /* Add a DIE to the delayed physname list. */
9144 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9145 const char *name
, struct die_info
*die
,
9146 struct dwarf2_cu
*cu
)
9148 struct delayed_method_info mi
;
9150 mi
.fnfield_index
= fnfield_index
;
9154 cu
->method_list
.push_back (mi
);
9157 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9158 "const" / "volatile". If so, decrements LEN by the length of the
9159 modifier and return true. Otherwise return false. */
9163 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9165 size_t mod_len
= sizeof (mod
) - 1;
9166 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9174 /* Compute the physnames of any methods on the CU's method list.
9176 The computation of method physnames is delayed in order to avoid the
9177 (bad) condition that one of the method's formal parameters is of an as yet
9181 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9183 /* Only C++ delays computing physnames. */
9184 if (cu
->method_list
.empty ())
9186 gdb_assert (cu
->language
== language_cplus
);
9188 for (const delayed_method_info
&mi
: cu
->method_list
)
9190 const char *physname
;
9191 struct fn_fieldlist
*fn_flp
9192 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9193 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9194 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9195 = physname
? physname
: "";
9197 /* Since there's no tag to indicate whether a method is a
9198 const/volatile overload, extract that information out of the
9200 if (physname
!= NULL
)
9202 size_t len
= strlen (physname
);
9206 if (physname
[len
] == ')') /* shortcut */
9208 else if (check_modifier (physname
, len
, " const"))
9209 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9210 else if (check_modifier (physname
, len
, " volatile"))
9211 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9218 /* The list is no longer needed. */
9219 cu
->method_list
.clear ();
9222 /* Go objects should be embedded in a DW_TAG_module DIE,
9223 and it's not clear if/how imported objects will appear.
9224 To keep Go support simple until that's worked out,
9225 go back through what we've read and create something usable.
9226 We could do this while processing each DIE, and feels kinda cleaner,
9227 but that way is more invasive.
9228 This is to, for example, allow the user to type "p var" or "b main"
9229 without having to specify the package name, and allow lookups
9230 of module.object to work in contexts that use the expression
9234 fixup_go_packaging (struct dwarf2_cu
*cu
)
9236 gdb::unique_xmalloc_ptr
<char> package_name
;
9237 struct pending
*list
;
9240 for (list
= *cu
->get_builder ()->get_global_symbols ();
9244 for (i
= 0; i
< list
->nsyms
; ++i
)
9246 struct symbol
*sym
= list
->symbol
[i
];
9248 if (sym
->language () == language_go
9249 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9251 gdb::unique_xmalloc_ptr
<char> this_package_name
9252 (go_symbol_package_name (sym
));
9254 if (this_package_name
== NULL
)
9256 if (package_name
== NULL
)
9257 package_name
= std::move (this_package_name
);
9260 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9261 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9262 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9263 (symbol_symtab (sym
) != NULL
9264 ? symtab_to_filename_for_display
9265 (symbol_symtab (sym
))
9266 : objfile_name (objfile
)),
9267 this_package_name
.get (), package_name
.get ());
9273 if (package_name
!= NULL
)
9275 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9276 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9277 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9278 saved_package_name
);
9281 sym
= new (&objfile
->objfile_obstack
) symbol
;
9282 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9283 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9284 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9285 e.g., "main" finds the "main" module and not C's main(). */
9286 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9287 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9288 SYMBOL_TYPE (sym
) = type
;
9290 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9294 /* Allocate a fully-qualified name consisting of the two parts on the
9298 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9300 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9303 /* A helper that allocates a variant part to attach to a Rust enum
9304 type. OBSTACK is where the results should be allocated. TYPE is
9305 the type we're processing. DISCRIMINANT_INDEX is the index of the
9306 discriminant. It must be the index of one of the fields of TYPE.
9307 DEFAULT_INDEX is the index of the default field; or -1 if there is
9308 no default. RANGES is indexed by "effective" field number (the
9309 field index, but omitting the discriminant and default fields) and
9310 must hold the discriminant values used by the variants. Note that
9311 RANGES must have a lifetime at least as long as OBSTACK -- either
9312 already allocated on it, or static. */
9315 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9316 int discriminant_index
, int default_index
,
9317 gdb::array_view
<discriminant_range
> ranges
)
9319 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9320 must be handled by the caller. */
9321 gdb_assert (discriminant_index
>= 0
9322 && discriminant_index
< type
->num_fields ());
9323 gdb_assert (default_index
== -1
9324 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9326 /* We have one variant for each non-discriminant field. */
9327 int n_variants
= type
->num_fields () - 1;
9329 variant
*variants
= new (obstack
) variant
[n_variants
];
9332 for (int i
= 0; i
< type
->num_fields (); ++i
)
9334 if (i
== discriminant_index
)
9337 variants
[var_idx
].first_field
= i
;
9338 variants
[var_idx
].last_field
= i
+ 1;
9340 /* The default field does not need a range, but other fields do.
9341 We skipped the discriminant above. */
9342 if (i
!= default_index
)
9344 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9351 gdb_assert (range_idx
== ranges
.size ());
9352 gdb_assert (var_idx
== n_variants
);
9354 variant_part
*part
= new (obstack
) variant_part
;
9355 part
->discriminant_index
= discriminant_index
;
9356 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9357 discriminant_index
));
9358 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9360 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9361 gdb::array_view
<variant_part
> *prop_value
9362 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9364 struct dynamic_prop prop
;
9365 prop
.kind
= PROP_VARIANT_PARTS
;
9366 prop
.data
.variant_parts
= prop_value
;
9368 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9371 /* Some versions of rustc emitted enums in an unusual way.
9373 Ordinary enums were emitted as unions. The first element of each
9374 structure in the union was named "RUST$ENUM$DISR". This element
9375 held the discriminant.
9377 These versions of Rust also implemented the "non-zero"
9378 optimization. When the enum had two values, and one is empty and
9379 the other holds a pointer that cannot be zero, the pointer is used
9380 as the discriminant, with a zero value meaning the empty variant.
9381 Here, the union's first member is of the form
9382 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9383 where the fieldnos are the indices of the fields that should be
9384 traversed in order to find the field (which may be several fields deep)
9385 and the variantname is the name of the variant of the case when the
9388 This function recognizes whether TYPE is of one of these forms,
9389 and, if so, smashes it to be a variant type. */
9392 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9394 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9396 /* We don't need to deal with empty enums. */
9397 if (type
->num_fields () == 0)
9400 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9401 if (type
->num_fields () == 1
9402 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9404 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9406 /* Decode the field name to find the offset of the
9408 ULONGEST bit_offset
= 0;
9409 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9410 while (name
[0] >= '0' && name
[0] <= '9')
9413 unsigned long index
= strtoul (name
, &tail
, 10);
9416 || index
>= field_type
->num_fields ()
9417 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9418 != FIELD_LOC_KIND_BITPOS
))
9420 complaint (_("Could not parse Rust enum encoding string \"%s\""
9422 TYPE_FIELD_NAME (type
, 0),
9423 objfile_name (objfile
));
9428 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9429 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9432 /* Smash this type to be a structure type. We have to do this
9433 because the type has already been recorded. */
9434 type
->set_code (TYPE_CODE_STRUCT
);
9435 type
->set_num_fields (3);
9436 /* Save the field we care about. */
9437 struct field saved_field
= type
->field (0);
9439 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9441 /* Put the discriminant at index 0. */
9442 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9443 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9444 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9445 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9447 /* The order of fields doesn't really matter, so put the real
9448 field at index 1 and the data-less field at index 2. */
9449 type
->field (1) = saved_field
;
9450 TYPE_FIELD_NAME (type
, 1)
9451 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, 1)->name ());
9452 TYPE_FIELD_TYPE (type
, 1)->set_name
9453 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9454 TYPE_FIELD_NAME (type
, 1)));
9456 const char *dataless_name
9457 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9459 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9461 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9462 /* NAME points into the original discriminant name, which
9463 already has the correct lifetime. */
9464 TYPE_FIELD_NAME (type
, 2) = name
;
9465 SET_FIELD_BITPOS (type
->field (2), 0);
9467 /* Indicate that this is a variant type. */
9468 static discriminant_range ranges
[1] = { { 0, 0 } };
9469 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9471 /* A union with a single anonymous field is probably an old-style
9473 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9475 /* Smash this type to be a structure type. We have to do this
9476 because the type has already been recorded. */
9477 type
->set_code (TYPE_CODE_STRUCT
);
9479 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9480 const char *variant_name
9481 = rust_last_path_segment (field_type
->name ());
9482 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9483 field_type
->set_name
9484 (rust_fully_qualify (&objfile
->objfile_obstack
,
9485 type
->name (), variant_name
));
9489 struct type
*disr_type
= nullptr;
9490 for (int i
= 0; i
< type
->num_fields (); ++i
)
9492 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9494 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9496 /* All fields of a true enum will be structs. */
9499 else if (disr_type
->num_fields () == 0)
9501 /* Could be data-less variant, so keep going. */
9502 disr_type
= nullptr;
9504 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9505 "RUST$ENUM$DISR") != 0)
9507 /* Not a Rust enum. */
9517 /* If we got here without a discriminant, then it's probably
9519 if (disr_type
== nullptr)
9522 /* Smash this type to be a structure type. We have to do this
9523 because the type has already been recorded. */
9524 type
->set_code (TYPE_CODE_STRUCT
);
9526 /* Make space for the discriminant field. */
9527 struct field
*disr_field
= &disr_type
->field (0);
9529 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9530 * sizeof (struct field
)));
9531 memcpy (new_fields
+ 1, type
->fields (),
9532 type
->num_fields () * sizeof (struct field
));
9533 type
->set_fields (new_fields
);
9534 type
->set_num_fields (type
->num_fields () + 1);
9536 /* Install the discriminant at index 0 in the union. */
9537 type
->field (0) = *disr_field
;
9538 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9539 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9541 /* We need a way to find the correct discriminant given a
9542 variant name. For convenience we build a map here. */
9543 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9544 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9545 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9547 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9550 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9551 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9555 int n_fields
= type
->num_fields ();
9556 /* We don't need a range entry for the discriminant, but we do
9557 need one for every other field, as there is no default
9559 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9562 /* Skip the discriminant here. */
9563 for (int i
= 1; i
< n_fields
; ++i
)
9565 /* Find the final word in the name of this variant's type.
9566 That name can be used to look up the correct
9568 const char *variant_name
9569 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, i
)->name ());
9571 auto iter
= discriminant_map
.find (variant_name
);
9572 if (iter
!= discriminant_map
.end ())
9574 ranges
[i
].low
= iter
->second
;
9575 ranges
[i
].high
= iter
->second
;
9578 /* Remove the discriminant field, if it exists. */
9579 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9580 if (sub_type
->num_fields () > 0)
9582 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9583 sub_type
->set_fields (sub_type
->fields () + 1);
9585 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9587 (rust_fully_qualify (&objfile
->objfile_obstack
,
9588 type
->name (), variant_name
));
9591 /* Indicate that this is a variant type. */
9592 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9593 gdb::array_view
<discriminant_range
> (ranges
,
9598 /* Rewrite some Rust unions to be structures with variants parts. */
9601 rust_union_quirks (struct dwarf2_cu
*cu
)
9603 gdb_assert (cu
->language
== language_rust
);
9604 for (type
*type_
: cu
->rust_unions
)
9605 quirk_rust_enum (type_
, cu
->per_objfile
->objfile
);
9606 /* We don't need this any more. */
9607 cu
->rust_unions
.clear ();
9612 type_unit_group_unshareable
*
9613 dwarf2_per_objfile::get_type_unit_group_unshareable (type_unit_group
*tu_group
)
9615 auto iter
= this->m_type_units
.find (tu_group
);
9616 if (iter
!= this->m_type_units
.end ())
9617 return iter
->second
.get ();
9619 type_unit_group_unshareable_up
uniq (new type_unit_group_unshareable
);
9620 type_unit_group_unshareable
*result
= uniq
.get ();
9621 this->m_type_units
[tu_group
] = std::move (uniq
);
9626 dwarf2_per_objfile::get_type_for_signatured_type
9627 (signatured_type
*sig_type
) const
9629 auto iter
= this->m_type_map
.find (sig_type
);
9630 if (iter
== this->m_type_map
.end ())
9633 return iter
->second
;
9636 void dwarf2_per_objfile::set_type_for_signatured_type
9637 (signatured_type
*sig_type
, struct type
*type
)
9639 gdb_assert (this->m_type_map
.find (sig_type
) == this->m_type_map
.end ());
9641 this->m_type_map
[sig_type
] = type
;
9644 /* A helper function for computing the list of all symbol tables
9645 included by PER_CU. */
9648 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9649 htab_t all_children
, htab_t all_type_symtabs
,
9650 dwarf2_per_cu_data
*per_cu
,
9651 dwarf2_per_objfile
*per_objfile
,
9652 struct compunit_symtab
*immediate_parent
)
9654 void **slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9657 /* This inclusion and its children have been processed. */
9663 /* Only add a CU if it has a symbol table. */
9664 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9667 /* If this is a type unit only add its symbol table if we haven't
9668 seen it yet (type unit per_cu's can share symtabs). */
9669 if (per_cu
->is_debug_types
)
9671 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9675 result
->push_back (cust
);
9676 if (cust
->user
== NULL
)
9677 cust
->user
= immediate_parent
;
9682 result
->push_back (cust
);
9683 if (cust
->user
== NULL
)
9684 cust
->user
= immediate_parent
;
9688 if (!per_cu
->imported_symtabs_empty ())
9689 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9691 recursively_compute_inclusions (result
, all_children
,
9692 all_type_symtabs
, ptr
, per_objfile
,
9697 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9701 compute_compunit_symtab_includes (dwarf2_per_cu_data
*per_cu
,
9702 dwarf2_per_objfile
*per_objfile
)
9704 gdb_assert (! per_cu
->is_debug_types
);
9706 if (!per_cu
->imported_symtabs_empty ())
9709 std::vector
<compunit_symtab
*> result_symtabs
;
9710 htab_t all_children
, all_type_symtabs
;
9711 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9713 /* If we don't have a symtab, we can just skip this case. */
9717 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9718 NULL
, xcalloc
, xfree
);
9719 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9720 NULL
, xcalloc
, xfree
);
9722 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9724 recursively_compute_inclusions (&result_symtabs
, all_children
,
9725 all_type_symtabs
, ptr
, per_objfile
,
9729 /* Now we have a transitive closure of all the included symtabs. */
9730 len
= result_symtabs
.size ();
9732 = XOBNEWVEC (&per_objfile
->objfile
->objfile_obstack
,
9733 struct compunit_symtab
*, len
+ 1);
9734 memcpy (cust
->includes
, result_symtabs
.data (),
9735 len
* sizeof (compunit_symtab
*));
9736 cust
->includes
[len
] = NULL
;
9738 htab_delete (all_children
);
9739 htab_delete (all_type_symtabs
);
9743 /* Compute the 'includes' field for the symtabs of all the CUs we just
9747 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9749 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->per_bfd
->just_read_cus
)
9751 if (! iter
->is_debug_types
)
9752 compute_compunit_symtab_includes (iter
, dwarf2_per_objfile
);
9755 dwarf2_per_objfile
->per_bfd
->just_read_cus
.clear ();
9758 /* Generate full symbol information for CU, whose DIEs have
9759 already been loaded into memory. */
9762 process_full_comp_unit (dwarf2_cu
*cu
, enum language pretend_language
)
9764 dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
9765 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9766 struct gdbarch
*gdbarch
= objfile
->arch ();
9767 CORE_ADDR lowpc
, highpc
;
9768 struct compunit_symtab
*cust
;
9770 struct block
*static_block
;
9773 baseaddr
= objfile
->text_section_offset ();
9775 /* Clear the list here in case something was left over. */
9776 cu
->method_list
.clear ();
9778 cu
->language
= pretend_language
;
9779 cu
->language_defn
= language_def (cu
->language
);
9781 /* Do line number decoding in read_file_scope () */
9782 process_die (cu
->dies
, cu
);
9784 /* For now fudge the Go package. */
9785 if (cu
->language
== language_go
)
9786 fixup_go_packaging (cu
);
9788 /* Now that we have processed all the DIEs in the CU, all the types
9789 should be complete, and it should now be safe to compute all of the
9791 compute_delayed_physnames (cu
);
9793 if (cu
->language
== language_rust
)
9794 rust_union_quirks (cu
);
9796 /* Some compilers don't define a DW_AT_high_pc attribute for the
9797 compilation unit. If the DW_AT_high_pc is missing, synthesize
9798 it, by scanning the DIE's below the compilation unit. */
9799 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9801 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9802 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9804 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9805 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9806 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9807 addrmap to help ensure it has an accurate map of pc values belonging to
9809 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9811 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9812 SECT_OFF_TEXT (objfile
),
9817 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9819 /* Set symtab language to language from DW_AT_language. If the
9820 compilation is from a C file generated by language preprocessors, do
9821 not set the language if it was already deduced by start_subfile. */
9822 if (!(cu
->language
== language_c
9823 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9824 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9826 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9827 produce DW_AT_location with location lists but it can be possibly
9828 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9829 there were bugs in prologue debug info, fixed later in GCC-4.5
9830 by "unwind info for epilogues" patch (which is not directly related).
9832 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9833 needed, it would be wrong due to missing DW_AT_producer there.
9835 Still one can confuse GDB by using non-standard GCC compilation
9836 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9838 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9839 cust
->locations_valid
= 1;
9841 if (gcc_4_minor
>= 5)
9842 cust
->epilogue_unwind_valid
= 1;
9844 cust
->call_site_htab
= cu
->call_site_htab
;
9847 dwarf2_per_objfile
->set_symtab (cu
->per_cu
, cust
);
9849 /* Push it for inclusion processing later. */
9850 dwarf2_per_objfile
->per_bfd
->just_read_cus
.push_back (cu
->per_cu
);
9852 /* Not needed any more. */
9853 cu
->reset_builder ();
9856 /* Generate full symbol information for type unit CU, whose DIEs have
9857 already been loaded into memory. */
9860 process_full_type_unit (dwarf2_cu
*cu
,
9861 enum language pretend_language
)
9863 dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
9864 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9865 struct compunit_symtab
*cust
;
9866 struct signatured_type
*sig_type
;
9868 gdb_assert (cu
->per_cu
->is_debug_types
);
9869 sig_type
= (struct signatured_type
*) cu
->per_cu
;
9871 /* Clear the list here in case something was left over. */
9872 cu
->method_list
.clear ();
9874 cu
->language
= pretend_language
;
9875 cu
->language_defn
= language_def (cu
->language
);
9877 /* The symbol tables are set up in read_type_unit_scope. */
9878 process_die (cu
->dies
, cu
);
9880 /* For now fudge the Go package. */
9881 if (cu
->language
== language_go
)
9882 fixup_go_packaging (cu
);
9884 /* Now that we have processed all the DIEs in the CU, all the types
9885 should be complete, and it should now be safe to compute all of the
9887 compute_delayed_physnames (cu
);
9889 if (cu
->language
== language_rust
)
9890 rust_union_quirks (cu
);
9892 /* TUs share symbol tables.
9893 If this is the first TU to use this symtab, complete the construction
9894 of it with end_expandable_symtab. Otherwise, complete the addition of
9895 this TU's symbols to the existing symtab. */
9896 type_unit_group_unshareable
*tug_unshare
=
9897 dwarf2_per_objfile
->get_type_unit_group_unshareable (sig_type
->type_unit_group
);
9898 if (tug_unshare
->compunit_symtab
== NULL
)
9900 buildsym_compunit
*builder
= cu
->get_builder ();
9901 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9902 tug_unshare
->compunit_symtab
= cust
;
9906 /* Set symtab language to language from DW_AT_language. If the
9907 compilation is from a C file generated by language preprocessors,
9908 do not set the language if it was already deduced by
9910 if (!(cu
->language
== language_c
9911 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9912 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9917 cu
->get_builder ()->augment_type_symtab ();
9918 cust
= tug_unshare
->compunit_symtab
;
9921 dwarf2_per_objfile
->set_symtab (cu
->per_cu
, cust
);
9923 /* Not needed any more. */
9924 cu
->reset_builder ();
9927 /* Process an imported unit DIE. */
9930 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9932 struct attribute
*attr
;
9934 /* For now we don't handle imported units in type units. */
9935 if (cu
->per_cu
->is_debug_types
)
9937 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9938 " supported in type units [in module %s]"),
9939 objfile_name (cu
->per_objfile
->objfile
));
9942 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9945 sect_offset sect_off
= attr
->get_ref_die_offset ();
9946 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9947 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
9948 dwarf2_per_cu_data
*per_cu
9949 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, per_objfile
);
9951 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9952 into another compilation unit, at root level. Regard this as a hint,
9954 if (die
->parent
&& die
->parent
->parent
== NULL
9955 && per_cu
->unit_type
== DW_UT_compile
9956 && per_cu
->lang
== language_cplus
)
9959 /* If necessary, add it to the queue and load its DIEs. */
9960 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
9961 load_full_comp_unit (per_cu
, per_objfile
, false, cu
->language
);
9963 cu
->per_cu
->imported_symtabs_push (per_cu
);
9967 /* RAII object that represents a process_die scope: i.e.,
9968 starts/finishes processing a DIE. */
9969 class process_die_scope
9972 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9973 : m_die (die
), m_cu (cu
)
9975 /* We should only be processing DIEs not already in process. */
9976 gdb_assert (!m_die
->in_process
);
9977 m_die
->in_process
= true;
9980 ~process_die_scope ()
9982 m_die
->in_process
= false;
9984 /* If we're done processing the DIE for the CU that owns the line
9985 header, we don't need the line header anymore. */
9986 if (m_cu
->line_header_die_owner
== m_die
)
9988 delete m_cu
->line_header
;
9989 m_cu
->line_header
= NULL
;
9990 m_cu
->line_header_die_owner
= NULL
;
9999 /* Process a die and its children. */
10002 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10004 process_die_scope
scope (die
, cu
);
10008 case DW_TAG_padding
:
10010 case DW_TAG_compile_unit
:
10011 case DW_TAG_partial_unit
:
10012 read_file_scope (die
, cu
);
10014 case DW_TAG_type_unit
:
10015 read_type_unit_scope (die
, cu
);
10017 case DW_TAG_subprogram
:
10018 /* Nested subprograms in Fortran get a prefix. */
10019 if (cu
->language
== language_fortran
10020 && die
->parent
!= NULL
10021 && die
->parent
->tag
== DW_TAG_subprogram
)
10022 cu
->processing_has_namespace_info
= true;
10023 /* Fall through. */
10024 case DW_TAG_inlined_subroutine
:
10025 read_func_scope (die
, cu
);
10027 case DW_TAG_lexical_block
:
10028 case DW_TAG_try_block
:
10029 case DW_TAG_catch_block
:
10030 read_lexical_block_scope (die
, cu
);
10032 case DW_TAG_call_site
:
10033 case DW_TAG_GNU_call_site
:
10034 read_call_site_scope (die
, cu
);
10036 case DW_TAG_class_type
:
10037 case DW_TAG_interface_type
:
10038 case DW_TAG_structure_type
:
10039 case DW_TAG_union_type
:
10040 process_structure_scope (die
, cu
);
10042 case DW_TAG_enumeration_type
:
10043 process_enumeration_scope (die
, cu
);
10046 /* These dies have a type, but processing them does not create
10047 a symbol or recurse to process the children. Therefore we can
10048 read them on-demand through read_type_die. */
10049 case DW_TAG_subroutine_type
:
10050 case DW_TAG_set_type
:
10051 case DW_TAG_array_type
:
10052 case DW_TAG_pointer_type
:
10053 case DW_TAG_ptr_to_member_type
:
10054 case DW_TAG_reference_type
:
10055 case DW_TAG_rvalue_reference_type
:
10056 case DW_TAG_string_type
:
10059 case DW_TAG_base_type
:
10060 case DW_TAG_subrange_type
:
10061 case DW_TAG_typedef
:
10062 /* Add a typedef symbol for the type definition, if it has a
10064 new_symbol (die
, read_type_die (die
, cu
), cu
);
10066 case DW_TAG_common_block
:
10067 read_common_block (die
, cu
);
10069 case DW_TAG_common_inclusion
:
10071 case DW_TAG_namespace
:
10072 cu
->processing_has_namespace_info
= true;
10073 read_namespace (die
, cu
);
10075 case DW_TAG_module
:
10076 cu
->processing_has_namespace_info
= true;
10077 read_module (die
, cu
);
10079 case DW_TAG_imported_declaration
:
10080 cu
->processing_has_namespace_info
= true;
10081 if (read_namespace_alias (die
, cu
))
10083 /* The declaration is not a global namespace alias. */
10084 /* Fall through. */
10085 case DW_TAG_imported_module
:
10086 cu
->processing_has_namespace_info
= true;
10087 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10088 || cu
->language
!= language_fortran
))
10089 complaint (_("Tag '%s' has unexpected children"),
10090 dwarf_tag_name (die
->tag
));
10091 read_import_statement (die
, cu
);
10094 case DW_TAG_imported_unit
:
10095 process_imported_unit_die (die
, cu
);
10098 case DW_TAG_variable
:
10099 read_variable (die
, cu
);
10103 new_symbol (die
, NULL
, cu
);
10108 /* DWARF name computation. */
10110 /* A helper function for dwarf2_compute_name which determines whether DIE
10111 needs to have the name of the scope prepended to the name listed in the
10115 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10117 struct attribute
*attr
;
10121 case DW_TAG_namespace
:
10122 case DW_TAG_typedef
:
10123 case DW_TAG_class_type
:
10124 case DW_TAG_interface_type
:
10125 case DW_TAG_structure_type
:
10126 case DW_TAG_union_type
:
10127 case DW_TAG_enumeration_type
:
10128 case DW_TAG_enumerator
:
10129 case DW_TAG_subprogram
:
10130 case DW_TAG_inlined_subroutine
:
10131 case DW_TAG_member
:
10132 case DW_TAG_imported_declaration
:
10135 case DW_TAG_variable
:
10136 case DW_TAG_constant
:
10137 /* We only need to prefix "globally" visible variables. These include
10138 any variable marked with DW_AT_external or any variable that
10139 lives in a namespace. [Variables in anonymous namespaces
10140 require prefixing, but they are not DW_AT_external.] */
10142 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10144 struct dwarf2_cu
*spec_cu
= cu
;
10146 return die_needs_namespace (die_specification (die
, &spec_cu
),
10150 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10151 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10152 && die
->parent
->tag
!= DW_TAG_module
)
10154 /* A variable in a lexical block of some kind does not need a
10155 namespace, even though in C++ such variables may be external
10156 and have a mangled name. */
10157 if (die
->parent
->tag
== DW_TAG_lexical_block
10158 || die
->parent
->tag
== DW_TAG_try_block
10159 || die
->parent
->tag
== DW_TAG_catch_block
10160 || die
->parent
->tag
== DW_TAG_subprogram
)
10169 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10170 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10171 defined for the given DIE. */
10173 static struct attribute
*
10174 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10176 struct attribute
*attr
;
10178 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10180 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10185 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10186 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10187 defined for the given DIE. */
10189 static const char *
10190 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10192 const char *linkage_name
;
10194 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10195 if (linkage_name
== NULL
)
10196 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10198 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10199 See https://github.com/rust-lang/rust/issues/32925. */
10200 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10201 && strchr (linkage_name
, '{') != NULL
)
10202 linkage_name
= NULL
;
10204 return linkage_name
;
10207 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10208 compute the physname for the object, which include a method's:
10209 - formal parameters (C++),
10210 - receiver type (Go),
10212 The term "physname" is a bit confusing.
10213 For C++, for example, it is the demangled name.
10214 For Go, for example, it's the mangled name.
10216 For Ada, return the DIE's linkage name rather than the fully qualified
10217 name. PHYSNAME is ignored..
10219 The result is allocated on the objfile->per_bfd's obstack and
10222 static const char *
10223 dwarf2_compute_name (const char *name
,
10224 struct die_info
*die
, struct dwarf2_cu
*cu
,
10227 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10230 name
= dwarf2_name (die
, cu
);
10232 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10233 but otherwise compute it by typename_concat inside GDB.
10234 FIXME: Actually this is not really true, or at least not always true.
10235 It's all very confusing. compute_and_set_names doesn't try to demangle
10236 Fortran names because there is no mangling standard. So new_symbol
10237 will set the demangled name to the result of dwarf2_full_name, and it is
10238 the demangled name that GDB uses if it exists. */
10239 if (cu
->language
== language_ada
10240 || (cu
->language
== language_fortran
&& physname
))
10242 /* For Ada unit, we prefer the linkage name over the name, as
10243 the former contains the exported name, which the user expects
10244 to be able to reference. Ideally, we want the user to be able
10245 to reference this entity using either natural or linkage name,
10246 but we haven't started looking at this enhancement yet. */
10247 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10249 if (linkage_name
!= NULL
)
10250 return linkage_name
;
10253 /* These are the only languages we know how to qualify names in. */
10255 && (cu
->language
== language_cplus
10256 || cu
->language
== language_fortran
|| cu
->language
== language_d
10257 || cu
->language
== language_rust
))
10259 if (die_needs_namespace (die
, cu
))
10261 const char *prefix
;
10262 const char *canonical_name
= NULL
;
10266 prefix
= determine_prefix (die
, cu
);
10267 if (*prefix
!= '\0')
10269 gdb::unique_xmalloc_ptr
<char> prefixed_name
10270 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10272 buf
.puts (prefixed_name
.get ());
10277 /* Template parameters may be specified in the DIE's DW_AT_name, or
10278 as children with DW_TAG_template_type_param or
10279 DW_TAG_value_type_param. If the latter, add them to the name
10280 here. If the name already has template parameters, then
10281 skip this step; some versions of GCC emit both, and
10282 it is more efficient to use the pre-computed name.
10284 Something to keep in mind about this process: it is very
10285 unlikely, or in some cases downright impossible, to produce
10286 something that will match the mangled name of a function.
10287 If the definition of the function has the same debug info,
10288 we should be able to match up with it anyway. But fallbacks
10289 using the minimal symbol, for instance to find a method
10290 implemented in a stripped copy of libstdc++, will not work.
10291 If we do not have debug info for the definition, we will have to
10292 match them up some other way.
10294 When we do name matching there is a related problem with function
10295 templates; two instantiated function templates are allowed to
10296 differ only by their return types, which we do not add here. */
10298 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10300 struct attribute
*attr
;
10301 struct die_info
*child
;
10304 die
->building_fullname
= 1;
10306 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10310 const gdb_byte
*bytes
;
10311 struct dwarf2_locexpr_baton
*baton
;
10314 if (child
->tag
!= DW_TAG_template_type_param
10315 && child
->tag
!= DW_TAG_template_value_param
)
10326 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10329 complaint (_("template parameter missing DW_AT_type"));
10330 buf
.puts ("UNKNOWN_TYPE");
10333 type
= die_type (child
, cu
);
10335 if (child
->tag
== DW_TAG_template_type_param
)
10337 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10338 &type_print_raw_options
);
10342 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10345 complaint (_("template parameter missing "
10346 "DW_AT_const_value"));
10347 buf
.puts ("UNKNOWN_VALUE");
10351 dwarf2_const_value_attr (attr
, type
, name
,
10352 &cu
->comp_unit_obstack
, cu
,
10353 &value
, &bytes
, &baton
);
10355 if (TYPE_NOSIGN (type
))
10356 /* GDB prints characters as NUMBER 'CHAR'. If that's
10357 changed, this can use value_print instead. */
10358 c_printchar (value
, type
, &buf
);
10361 struct value_print_options opts
;
10364 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10368 baton
->per_objfile
);
10369 else if (bytes
!= NULL
)
10371 v
= allocate_value (type
);
10372 memcpy (value_contents_writeable (v
), bytes
,
10373 TYPE_LENGTH (type
));
10376 v
= value_from_longest (type
, value
);
10378 /* Specify decimal so that we do not depend on
10380 get_formatted_print_options (&opts
, 'd');
10382 value_print (v
, &buf
, &opts
);
10387 die
->building_fullname
= 0;
10391 /* Close the argument list, with a space if necessary
10392 (nested templates). */
10393 if (!buf
.empty () && buf
.string ().back () == '>')
10400 /* For C++ methods, append formal parameter type
10401 information, if PHYSNAME. */
10403 if (physname
&& die
->tag
== DW_TAG_subprogram
10404 && cu
->language
== language_cplus
)
10406 struct type
*type
= read_type_die (die
, cu
);
10408 c_type_print_args (type
, &buf
, 1, cu
->language
,
10409 &type_print_raw_options
);
10411 if (cu
->language
== language_cplus
)
10413 /* Assume that an artificial first parameter is
10414 "this", but do not crash if it is not. RealView
10415 marks unnamed (and thus unused) parameters as
10416 artificial; there is no way to differentiate
10418 if (type
->num_fields () > 0
10419 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10420 && TYPE_FIELD_TYPE (type
, 0)->code () == TYPE_CODE_PTR
10421 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10423 buf
.puts (" const");
10427 const std::string
&intermediate_name
= buf
.string ();
10429 if (cu
->language
== language_cplus
)
10431 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10434 /* If we only computed INTERMEDIATE_NAME, or if
10435 INTERMEDIATE_NAME is already canonical, then we need to
10437 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10438 name
= objfile
->intern (intermediate_name
);
10440 name
= canonical_name
;
10447 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10448 If scope qualifiers are appropriate they will be added. The result
10449 will be allocated on the storage_obstack, or NULL if the DIE does
10450 not have a name. NAME may either be from a previous call to
10451 dwarf2_name or NULL.
10453 The output string will be canonicalized (if C++). */
10455 static const char *
10456 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10458 return dwarf2_compute_name (name
, die
, cu
, 0);
10461 /* Construct a physname for the given DIE in CU. NAME may either be
10462 from a previous call to dwarf2_name or NULL. The result will be
10463 allocated on the objfile_objstack or NULL if the DIE does not have a
10466 The output string will be canonicalized (if C++). */
10468 static const char *
10469 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10471 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10472 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10475 /* In this case dwarf2_compute_name is just a shortcut not building anything
10477 if (!die_needs_namespace (die
, cu
))
10478 return dwarf2_compute_name (name
, die
, cu
, 1);
10480 if (cu
->language
!= language_rust
)
10481 mangled
= dw2_linkage_name (die
, cu
);
10483 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10485 gdb::unique_xmalloc_ptr
<char> demangled
;
10486 if (mangled
!= NULL
)
10489 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10491 /* Do nothing (do not demangle the symbol name). */
10493 else if (cu
->language
== language_go
)
10495 /* This is a lie, but we already lie to the caller new_symbol.
10496 new_symbol assumes we return the mangled name.
10497 This just undoes that lie until things are cleaned up. */
10501 /* Use DMGL_RET_DROP for C++ template functions to suppress
10502 their return type. It is easier for GDB users to search
10503 for such functions as `name(params)' than `long name(params)'.
10504 In such case the minimal symbol names do not match the full
10505 symbol names but for template functions there is never a need
10506 to look up their definition from their declaration so
10507 the only disadvantage remains the minimal symbol variant
10508 `long name(params)' does not have the proper inferior type. */
10509 demangled
.reset (gdb_demangle (mangled
,
10510 (DMGL_PARAMS
| DMGL_ANSI
10511 | DMGL_RET_DROP
)));
10514 canon
= demangled
.get ();
10522 if (canon
== NULL
|| check_physname
)
10524 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10526 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10528 /* It may not mean a bug in GDB. The compiler could also
10529 compute DW_AT_linkage_name incorrectly. But in such case
10530 GDB would need to be bug-to-bug compatible. */
10532 complaint (_("Computed physname <%s> does not match demangled <%s> "
10533 "(from linkage <%s>) - DIE at %s [in module %s]"),
10534 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10535 objfile_name (objfile
));
10537 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10538 is available here - over computed PHYSNAME. It is safer
10539 against both buggy GDB and buggy compilers. */
10553 retval
= objfile
->intern (retval
);
10558 /* Inspect DIE in CU for a namespace alias. If one exists, record
10559 a new symbol for it.
10561 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10564 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10566 struct attribute
*attr
;
10568 /* If the die does not have a name, this is not a namespace
10570 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10574 struct die_info
*d
= die
;
10575 struct dwarf2_cu
*imported_cu
= cu
;
10577 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10578 keep inspecting DIEs until we hit the underlying import. */
10579 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10580 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10582 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10586 d
= follow_die_ref (d
, attr
, &imported_cu
);
10587 if (d
->tag
!= DW_TAG_imported_declaration
)
10591 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10593 complaint (_("DIE at %s has too many recursively imported "
10594 "declarations"), sect_offset_str (d
->sect_off
));
10601 sect_offset sect_off
= attr
->get_ref_die_offset ();
10603 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, cu
->per_objfile
);
10604 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10606 /* This declaration is a global namespace alias. Add
10607 a symbol for it whose type is the aliased namespace. */
10608 new_symbol (die
, type
, cu
);
10617 /* Return the using directives repository (global or local?) to use in the
10618 current context for CU.
10620 For Ada, imported declarations can materialize renamings, which *may* be
10621 global. However it is impossible (for now?) in DWARF to distinguish
10622 "external" imported declarations and "static" ones. As all imported
10623 declarations seem to be static in all other languages, make them all CU-wide
10624 global only in Ada. */
10626 static struct using_direct
**
10627 using_directives (struct dwarf2_cu
*cu
)
10629 if (cu
->language
== language_ada
10630 && cu
->get_builder ()->outermost_context_p ())
10631 return cu
->get_builder ()->get_global_using_directives ();
10633 return cu
->get_builder ()->get_local_using_directives ();
10636 /* Read the import statement specified by the given die and record it. */
10639 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10641 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10642 struct attribute
*import_attr
;
10643 struct die_info
*imported_die
, *child_die
;
10644 struct dwarf2_cu
*imported_cu
;
10645 const char *imported_name
;
10646 const char *imported_name_prefix
;
10647 const char *canonical_name
;
10648 const char *import_alias
;
10649 const char *imported_declaration
= NULL
;
10650 const char *import_prefix
;
10651 std::vector
<const char *> excludes
;
10653 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10654 if (import_attr
== NULL
)
10656 complaint (_("Tag '%s' has no DW_AT_import"),
10657 dwarf_tag_name (die
->tag
));
10662 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10663 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10664 if (imported_name
== NULL
)
10666 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10668 The import in the following code:
10682 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10683 <52> DW_AT_decl_file : 1
10684 <53> DW_AT_decl_line : 6
10685 <54> DW_AT_import : <0x75>
10686 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10687 <59> DW_AT_name : B
10688 <5b> DW_AT_decl_file : 1
10689 <5c> DW_AT_decl_line : 2
10690 <5d> DW_AT_type : <0x6e>
10692 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10693 <76> DW_AT_byte_size : 4
10694 <77> DW_AT_encoding : 5 (signed)
10696 imports the wrong die ( 0x75 instead of 0x58 ).
10697 This case will be ignored until the gcc bug is fixed. */
10701 /* Figure out the local name after import. */
10702 import_alias
= dwarf2_name (die
, cu
);
10704 /* Figure out where the statement is being imported to. */
10705 import_prefix
= determine_prefix (die
, cu
);
10707 /* Figure out what the scope of the imported die is and prepend it
10708 to the name of the imported die. */
10709 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10711 if (imported_die
->tag
!= DW_TAG_namespace
10712 && imported_die
->tag
!= DW_TAG_module
)
10714 imported_declaration
= imported_name
;
10715 canonical_name
= imported_name_prefix
;
10717 else if (strlen (imported_name_prefix
) > 0)
10718 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10719 imported_name_prefix
,
10720 (cu
->language
== language_d
? "." : "::"),
10721 imported_name
, (char *) NULL
);
10723 canonical_name
= imported_name
;
10725 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10726 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10727 child_die
= child_die
->sibling
)
10729 /* DWARF-4: A Fortran use statement with a “rename list” may be
10730 represented by an imported module entry with an import attribute
10731 referring to the module and owned entries corresponding to those
10732 entities that are renamed as part of being imported. */
10734 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10736 complaint (_("child DW_TAG_imported_declaration expected "
10737 "- DIE at %s [in module %s]"),
10738 sect_offset_str (child_die
->sect_off
),
10739 objfile_name (objfile
));
10743 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10744 if (import_attr
== NULL
)
10746 complaint (_("Tag '%s' has no DW_AT_import"),
10747 dwarf_tag_name (child_die
->tag
));
10752 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10754 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10755 if (imported_name
== NULL
)
10757 complaint (_("child DW_TAG_imported_declaration has unknown "
10758 "imported name - DIE at %s [in module %s]"),
10759 sect_offset_str (child_die
->sect_off
),
10760 objfile_name (objfile
));
10764 excludes
.push_back (imported_name
);
10766 process_die (child_die
, cu
);
10769 add_using_directive (using_directives (cu
),
10773 imported_declaration
,
10776 &objfile
->objfile_obstack
);
10779 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10780 types, but gives them a size of zero. Starting with version 14,
10781 ICC is compatible with GCC. */
10784 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10786 if (!cu
->checked_producer
)
10787 check_producer (cu
);
10789 return cu
->producer_is_icc_lt_14
;
10792 /* ICC generates a DW_AT_type for C void functions. This was observed on
10793 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10794 which says that void functions should not have a DW_AT_type. */
10797 producer_is_icc (struct dwarf2_cu
*cu
)
10799 if (!cu
->checked_producer
)
10800 check_producer (cu
);
10802 return cu
->producer_is_icc
;
10805 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10806 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10807 this, it was first present in GCC release 4.3.0. */
10810 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10812 if (!cu
->checked_producer
)
10813 check_producer (cu
);
10815 return cu
->producer_is_gcc_lt_4_3
;
10818 static file_and_directory
10819 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10821 file_and_directory res
;
10823 /* Find the filename. Do not use dwarf2_name here, since the filename
10824 is not a source language identifier. */
10825 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10826 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10828 if (res
.comp_dir
== NULL
10829 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10830 && IS_ABSOLUTE_PATH (res
.name
))
10832 res
.comp_dir_storage
= ldirname (res
.name
);
10833 if (!res
.comp_dir_storage
.empty ())
10834 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10836 if (res
.comp_dir
!= NULL
)
10838 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10839 directory, get rid of it. */
10840 const char *cp
= strchr (res
.comp_dir
, ':');
10842 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10843 res
.comp_dir
= cp
+ 1;
10846 if (res
.name
== NULL
)
10847 res
.name
= "<unknown>";
10852 /* Handle DW_AT_stmt_list for a compilation unit.
10853 DIE is the DW_TAG_compile_unit die for CU.
10854 COMP_DIR is the compilation directory. LOWPC is passed to
10855 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10858 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10859 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10861 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
10862 struct attribute
*attr
;
10863 struct line_header line_header_local
;
10864 hashval_t line_header_local_hash
;
10866 int decode_mapping
;
10868 gdb_assert (! cu
->per_cu
->is_debug_types
);
10870 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10874 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10876 /* The line header hash table is only created if needed (it exists to
10877 prevent redundant reading of the line table for partial_units).
10878 If we're given a partial_unit, we'll need it. If we're given a
10879 compile_unit, then use the line header hash table if it's already
10880 created, but don't create one just yet. */
10882 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
10883 && die
->tag
== DW_TAG_partial_unit
)
10885 dwarf2_per_objfile
->per_bfd
->line_header_hash
10886 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10887 line_header_eq_voidp
,
10888 free_line_header_voidp
,
10892 line_header_local
.sect_off
= line_offset
;
10893 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10894 line_header_local_hash
= line_header_hash (&line_header_local
);
10895 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
!= NULL
)
10897 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10898 &line_header_local
,
10899 line_header_local_hash
, NO_INSERT
);
10901 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10902 is not present in *SLOT (since if there is something in *SLOT then
10903 it will be for a partial_unit). */
10904 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10906 gdb_assert (*slot
!= NULL
);
10907 cu
->line_header
= (struct line_header
*) *slot
;
10912 /* dwarf_decode_line_header does not yet provide sufficient information.
10913 We always have to call also dwarf_decode_lines for it. */
10914 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10918 cu
->line_header
= lh
.release ();
10919 cu
->line_header_die_owner
= die
;
10921 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
)
10925 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10926 &line_header_local
,
10927 line_header_local_hash
, INSERT
);
10928 gdb_assert (slot
!= NULL
);
10930 if (slot
!= NULL
&& *slot
== NULL
)
10932 /* This newly decoded line number information unit will be owned
10933 by line_header_hash hash table. */
10934 *slot
= cu
->line_header
;
10935 cu
->line_header_die_owner
= NULL
;
10939 /* We cannot free any current entry in (*slot) as that struct line_header
10940 may be already used by multiple CUs. Create only temporary decoded
10941 line_header for this CU - it may happen at most once for each line
10942 number information unit. And if we're not using line_header_hash
10943 then this is what we want as well. */
10944 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10946 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10947 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10952 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10955 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10957 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
10958 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10959 struct gdbarch
*gdbarch
= objfile
->arch ();
10960 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10961 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10962 struct attribute
*attr
;
10963 struct die_info
*child_die
;
10964 CORE_ADDR baseaddr
;
10966 prepare_one_comp_unit (cu
, die
, cu
->language
);
10967 baseaddr
= objfile
->text_section_offset ();
10969 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10971 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10972 from finish_block. */
10973 if (lowpc
== ((CORE_ADDR
) -1))
10975 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10977 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10979 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10980 standardised yet. As a workaround for the language detection we fall
10981 back to the DW_AT_producer string. */
10982 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10983 cu
->language
= language_opencl
;
10985 /* Similar hack for Go. */
10986 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10987 set_cu_language (DW_LANG_Go
, cu
);
10989 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10991 /* Decode line number information if present. We do this before
10992 processing child DIEs, so that the line header table is available
10993 for DW_AT_decl_file. */
10994 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10996 /* Process all dies in compilation unit. */
10997 if (die
->child
!= NULL
)
10999 child_die
= die
->child
;
11000 while (child_die
&& child_die
->tag
)
11002 process_die (child_die
, cu
);
11003 child_die
= child_die
->sibling
;
11007 /* Decode macro information, if present. Dwarf 2 macro information
11008 refers to information in the line number info statement program
11009 header, so we can only read it if we've read the header
11011 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11013 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11014 if (attr
&& cu
->line_header
)
11016 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11017 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11019 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11023 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11024 if (attr
&& cu
->line_header
)
11026 unsigned int macro_offset
= DW_UNSND (attr
);
11028 dwarf_decode_macros (cu
, macro_offset
, 0);
11034 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11036 struct type_unit_group
*tu_group
;
11038 struct attribute
*attr
;
11040 struct signatured_type
*sig_type
;
11042 gdb_assert (per_cu
->is_debug_types
);
11043 sig_type
= (struct signatured_type
*) per_cu
;
11045 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11047 /* If we're using .gdb_index (includes -readnow) then
11048 per_cu->type_unit_group may not have been set up yet. */
11049 if (sig_type
->type_unit_group
== NULL
)
11050 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11051 tu_group
= sig_type
->type_unit_group
;
11053 /* If we've already processed this stmt_list there's no real need to
11054 do it again, we could fake it and just recreate the part we need
11055 (file name,index -> symtab mapping). If data shows this optimization
11056 is useful we can do it then. */
11057 type_unit_group_unshareable
*tug_unshare
11058 = per_objfile
->get_type_unit_group_unshareable (tu_group
);
11059 first_time
= tug_unshare
->compunit_symtab
== NULL
;
11061 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11066 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11067 lh
= dwarf_decode_line_header (line_offset
, this);
11072 start_symtab ("", NULL
, 0);
11075 gdb_assert (tug_unshare
->symtabs
== NULL
);
11076 gdb_assert (m_builder
== nullptr);
11077 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11078 m_builder
.reset (new struct buildsym_compunit
11079 (COMPUNIT_OBJFILE (cust
), "",
11080 COMPUNIT_DIRNAME (cust
),
11081 compunit_language (cust
),
11083 list_in_scope
= get_builder ()->get_file_symbols ();
11088 line_header
= lh
.release ();
11089 line_header_die_owner
= die
;
11093 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11095 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11096 still initializing it, and our caller (a few levels up)
11097 process_full_type_unit still needs to know if this is the first
11100 tug_unshare
->symtabs
11101 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11102 struct symtab
*, line_header
->file_names_size ());
11104 auto &file_names
= line_header
->file_names ();
11105 for (i
= 0; i
< file_names
.size (); ++i
)
11107 file_entry
&fe
= file_names
[i
];
11108 dwarf2_start_subfile (this, fe
.name
,
11109 fe
.include_dir (line_header
));
11110 buildsym_compunit
*b
= get_builder ();
11111 if (b
->get_current_subfile ()->symtab
== NULL
)
11113 /* NOTE: start_subfile will recognize when it's been
11114 passed a file it has already seen. So we can't
11115 assume there's a simple mapping from
11116 cu->line_header->file_names to subfiles, plus
11117 cu->line_header->file_names may contain dups. */
11118 b
->get_current_subfile ()->symtab
11119 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11122 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11123 tug_unshare
->symtabs
[i
] = fe
.symtab
;
11128 gdb_assert (m_builder
== nullptr);
11129 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11130 m_builder
.reset (new struct buildsym_compunit
11131 (COMPUNIT_OBJFILE (cust
), "",
11132 COMPUNIT_DIRNAME (cust
),
11133 compunit_language (cust
),
11135 list_in_scope
= get_builder ()->get_file_symbols ();
11137 auto &file_names
= line_header
->file_names ();
11138 for (i
= 0; i
< file_names
.size (); ++i
)
11140 file_entry
&fe
= file_names
[i
];
11141 fe
.symtab
= tug_unshare
->symtabs
[i
];
11145 /* The main symtab is allocated last. Type units don't have DW_AT_name
11146 so they don't have a "real" (so to speak) symtab anyway.
11147 There is later code that will assign the main symtab to all symbols
11148 that don't have one. We need to handle the case of a symbol with a
11149 missing symtab (DW_AT_decl_file) anyway. */
11152 /* Process DW_TAG_type_unit.
11153 For TUs we want to skip the first top level sibling if it's not the
11154 actual type being defined by this TU. In this case the first top
11155 level sibling is there to provide context only. */
11158 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11160 struct die_info
*child_die
;
11162 prepare_one_comp_unit (cu
, die
, language_minimal
);
11164 /* Initialize (or reinitialize) the machinery for building symtabs.
11165 We do this before processing child DIEs, so that the line header table
11166 is available for DW_AT_decl_file. */
11167 cu
->setup_type_unit_groups (die
);
11169 if (die
->child
!= NULL
)
11171 child_die
= die
->child
;
11172 while (child_die
&& child_die
->tag
)
11174 process_die (child_die
, cu
);
11175 child_die
= child_die
->sibling
;
11182 http://gcc.gnu.org/wiki/DebugFission
11183 http://gcc.gnu.org/wiki/DebugFissionDWP
11185 To simplify handling of both DWO files ("object" files with the DWARF info)
11186 and DWP files (a file with the DWOs packaged up into one file), we treat
11187 DWP files as having a collection of virtual DWO files. */
11190 hash_dwo_file (const void *item
)
11192 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11195 hash
= htab_hash_string (dwo_file
->dwo_name
);
11196 if (dwo_file
->comp_dir
!= NULL
)
11197 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11202 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11204 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11205 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11207 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11209 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11210 return lhs
->comp_dir
== rhs
->comp_dir
;
11211 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11214 /* Allocate a hash table for DWO files. */
11217 allocate_dwo_file_hash_table ()
11219 auto delete_dwo_file
= [] (void *item
)
11221 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11226 return htab_up (htab_create_alloc (41,
11233 /* Lookup DWO file DWO_NAME. */
11236 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11237 const char *dwo_name
,
11238 const char *comp_dir
)
11240 struct dwo_file find_entry
;
11243 if (dwarf2_per_objfile
->per_bfd
->dwo_files
== NULL
)
11244 dwarf2_per_objfile
->per_bfd
->dwo_files
= allocate_dwo_file_hash_table ();
11246 find_entry
.dwo_name
= dwo_name
;
11247 find_entry
.comp_dir
= comp_dir
;
11248 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (), &find_entry
,
11255 hash_dwo_unit (const void *item
)
11257 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11259 /* This drops the top 32 bits of the id, but is ok for a hash. */
11260 return dwo_unit
->signature
;
11264 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11266 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11267 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11269 /* The signature is assumed to be unique within the DWO file.
11270 So while object file CU dwo_id's always have the value zero,
11271 that's OK, assuming each object file DWO file has only one CU,
11272 and that's the rule for now. */
11273 return lhs
->signature
== rhs
->signature
;
11276 /* Allocate a hash table for DWO CUs,TUs.
11277 There is one of these tables for each of CUs,TUs for each DWO file. */
11280 allocate_dwo_unit_table ()
11282 /* Start out with a pretty small number.
11283 Generally DWO files contain only one CU and maybe some TUs. */
11284 return htab_up (htab_create_alloc (3,
11287 NULL
, xcalloc
, xfree
));
11290 /* die_reader_func for create_dwo_cu. */
11293 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11294 const gdb_byte
*info_ptr
,
11295 struct die_info
*comp_unit_die
,
11296 struct dwo_file
*dwo_file
,
11297 struct dwo_unit
*dwo_unit
)
11299 struct dwarf2_cu
*cu
= reader
->cu
;
11300 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11301 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11303 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11304 if (!signature
.has_value ())
11306 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11307 " its dwo_id [in module %s]"),
11308 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11312 dwo_unit
->dwo_file
= dwo_file
;
11313 dwo_unit
->signature
= *signature
;
11314 dwo_unit
->section
= section
;
11315 dwo_unit
->sect_off
= sect_off
;
11316 dwo_unit
->length
= cu
->per_cu
->length
;
11318 if (dwarf_read_debug
)
11319 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11320 sect_offset_str (sect_off
),
11321 hex_string (dwo_unit
->signature
));
11324 /* Create the dwo_units for the CUs in a DWO_FILE.
11325 Note: This function processes DWO files only, not DWP files. */
11328 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11329 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11330 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11332 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11333 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
11334 const gdb_byte
*info_ptr
, *end_ptr
;
11336 section
.read (objfile
);
11337 info_ptr
= section
.buffer
;
11339 if (info_ptr
== NULL
)
11342 if (dwarf_read_debug
)
11344 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11345 section
.get_name (),
11346 section
.get_file_name ());
11349 end_ptr
= info_ptr
+ section
.size
;
11350 while (info_ptr
< end_ptr
)
11352 struct dwarf2_per_cu_data per_cu
;
11353 struct dwo_unit read_unit
{};
11354 struct dwo_unit
*dwo_unit
;
11356 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11358 memset (&per_cu
, 0, sizeof (per_cu
));
11359 per_cu
.per_bfd
= per_bfd
;
11360 per_cu
.is_debug_types
= 0;
11361 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11362 per_cu
.section
= §ion
;
11364 cutu_reader
reader (&per_cu
, dwarf2_per_objfile
, cu
, &dwo_file
);
11365 if (!reader
.dummy_p
)
11366 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11367 &dwo_file
, &read_unit
);
11368 info_ptr
+= per_cu
.length
;
11370 // If the unit could not be parsed, skip it.
11371 if (read_unit
.dwo_file
== NULL
)
11374 if (cus_htab
== NULL
)
11375 cus_htab
= allocate_dwo_unit_table ();
11377 dwo_unit
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
11379 *dwo_unit
= read_unit
;
11380 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11381 gdb_assert (slot
!= NULL
);
11384 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11385 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11387 complaint (_("debug cu entry at offset %s is duplicate to"
11388 " the entry at offset %s, signature %s"),
11389 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11390 hex_string (dwo_unit
->signature
));
11392 *slot
= (void *)dwo_unit
;
11396 /* DWP file .debug_{cu,tu}_index section format:
11397 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11401 Both index sections have the same format, and serve to map a 64-bit
11402 signature to a set of section numbers. Each section begins with a header,
11403 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11404 indexes, and a pool of 32-bit section numbers. The index sections will be
11405 aligned at 8-byte boundaries in the file.
11407 The index section header consists of:
11409 V, 32 bit version number
11411 N, 32 bit number of compilation units or type units in the index
11412 M, 32 bit number of slots in the hash table
11414 Numbers are recorded using the byte order of the application binary.
11416 The hash table begins at offset 16 in the section, and consists of an array
11417 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11418 order of the application binary). Unused slots in the hash table are 0.
11419 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11421 The parallel table begins immediately after the hash table
11422 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11423 array of 32-bit indexes (using the byte order of the application binary),
11424 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11425 table contains a 32-bit index into the pool of section numbers. For unused
11426 hash table slots, the corresponding entry in the parallel table will be 0.
11428 The pool of section numbers begins immediately following the hash table
11429 (at offset 16 + 12 * M from the beginning of the section). The pool of
11430 section numbers consists of an array of 32-bit words (using the byte order
11431 of the application binary). Each item in the array is indexed starting
11432 from 0. The hash table entry provides the index of the first section
11433 number in the set. Additional section numbers in the set follow, and the
11434 set is terminated by a 0 entry (section number 0 is not used in ELF).
11436 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11437 section must be the first entry in the set, and the .debug_abbrev.dwo must
11438 be the second entry. Other members of the set may follow in any order.
11444 DWP Version 2 combines all the .debug_info, etc. sections into one,
11445 and the entries in the index tables are now offsets into these sections.
11446 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11449 Index Section Contents:
11451 Hash Table of Signatures dwp_hash_table.hash_table
11452 Parallel Table of Indices dwp_hash_table.unit_table
11453 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11454 Table of Section Sizes dwp_hash_table.v2.sizes
11456 The index section header consists of:
11458 V, 32 bit version number
11459 L, 32 bit number of columns in the table of section offsets
11460 N, 32 bit number of compilation units or type units in the index
11461 M, 32 bit number of slots in the hash table
11463 Numbers are recorded using the byte order of the application binary.
11465 The hash table has the same format as version 1.
11466 The parallel table of indices has the same format as version 1,
11467 except that the entries are origin-1 indices into the table of sections
11468 offsets and the table of section sizes.
11470 The table of offsets begins immediately following the parallel table
11471 (at offset 16 + 12 * M from the beginning of the section). The table is
11472 a two-dimensional array of 32-bit words (using the byte order of the
11473 application binary), with L columns and N+1 rows, in row-major order.
11474 Each row in the array is indexed starting from 0. The first row provides
11475 a key to the remaining rows: each column in this row provides an identifier
11476 for a debug section, and the offsets in the same column of subsequent rows
11477 refer to that section. The section identifiers are:
11479 DW_SECT_INFO 1 .debug_info.dwo
11480 DW_SECT_TYPES 2 .debug_types.dwo
11481 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11482 DW_SECT_LINE 4 .debug_line.dwo
11483 DW_SECT_LOC 5 .debug_loc.dwo
11484 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11485 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11486 DW_SECT_MACRO 8 .debug_macro.dwo
11488 The offsets provided by the CU and TU index sections are the base offsets
11489 for the contributions made by each CU or TU to the corresponding section
11490 in the package file. Each CU and TU header contains an abbrev_offset
11491 field, used to find the abbreviations table for that CU or TU within the
11492 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11493 be interpreted as relative to the base offset given in the index section.
11494 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11495 should be interpreted as relative to the base offset for .debug_line.dwo,
11496 and offsets into other debug sections obtained from DWARF attributes should
11497 also be interpreted as relative to the corresponding base offset.
11499 The table of sizes begins immediately following the table of offsets.
11500 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11501 with L columns and N rows, in row-major order. Each row in the array is
11502 indexed starting from 1 (row 0 is shared by the two tables).
11506 Hash table lookup is handled the same in version 1 and 2:
11508 We assume that N and M will not exceed 2^32 - 1.
11509 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11511 Given a 64-bit compilation unit signature or a type signature S, an entry
11512 in the hash table is located as follows:
11514 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11515 the low-order k bits all set to 1.
11517 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11519 3) If the hash table entry at index H matches the signature, use that
11520 entry. If the hash table entry at index H is unused (all zeroes),
11521 terminate the search: the signature is not present in the table.
11523 4) Let H = (H + H') modulo M. Repeat at Step 3.
11525 Because M > N and H' and M are relatively prime, the search is guaranteed
11526 to stop at an unused slot or find the match. */
11528 /* Create a hash table to map DWO IDs to their CU/TU entry in
11529 .debug_{info,types}.dwo in DWP_FILE.
11530 Returns NULL if there isn't one.
11531 Note: This function processes DWP files only, not DWO files. */
11533 static struct dwp_hash_table
*
11534 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11535 struct dwp_file
*dwp_file
, int is_debug_types
)
11537 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11538 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11539 const gdb_byte
*index_ptr
, *index_end
;
11540 struct dwarf2_section_info
*index
;
11541 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11542 struct dwp_hash_table
*htab
;
11544 if (is_debug_types
)
11545 index
= &dwp_file
->sections
.tu_index
;
11547 index
= &dwp_file
->sections
.cu_index
;
11549 if (index
->empty ())
11551 index
->read (objfile
);
11553 index_ptr
= index
->buffer
;
11554 index_end
= index_ptr
+ index
->size
;
11556 version
= read_4_bytes (dbfd
, index_ptr
);
11559 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11563 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11565 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11568 if (version
!= 1 && version
!= 2)
11570 error (_("Dwarf Error: unsupported DWP file version (%s)"
11571 " [in module %s]"),
11572 pulongest (version
), dwp_file
->name
);
11574 if (nr_slots
!= (nr_slots
& -nr_slots
))
11576 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11577 " is not power of 2 [in module %s]"),
11578 pulongest (nr_slots
), dwp_file
->name
);
11581 htab
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwp_hash_table
);
11582 htab
->version
= version
;
11583 htab
->nr_columns
= nr_columns
;
11584 htab
->nr_units
= nr_units
;
11585 htab
->nr_slots
= nr_slots
;
11586 htab
->hash_table
= index_ptr
;
11587 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11589 /* Exit early if the table is empty. */
11590 if (nr_slots
== 0 || nr_units
== 0
11591 || (version
== 2 && nr_columns
== 0))
11593 /* All must be zero. */
11594 if (nr_slots
!= 0 || nr_units
!= 0
11595 || (version
== 2 && nr_columns
!= 0))
11597 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11598 " all zero [in modules %s]"),
11606 htab
->section_pool
.v1
.indices
=
11607 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11608 /* It's harder to decide whether the section is too small in v1.
11609 V1 is deprecated anyway so we punt. */
11613 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11614 int *ids
= htab
->section_pool
.v2
.section_ids
;
11615 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11616 /* Reverse map for error checking. */
11617 int ids_seen
[DW_SECT_MAX
+ 1];
11620 if (nr_columns
< 2)
11622 error (_("Dwarf Error: bad DWP hash table, too few columns"
11623 " in section table [in module %s]"),
11626 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11628 error (_("Dwarf Error: bad DWP hash table, too many columns"
11629 " in section table [in module %s]"),
11632 memset (ids
, 255, sizeof_ids
);
11633 memset (ids_seen
, 255, sizeof (ids_seen
));
11634 for (i
= 0; i
< nr_columns
; ++i
)
11636 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11638 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11640 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11641 " in section table [in module %s]"),
11642 id
, dwp_file
->name
);
11644 if (ids_seen
[id
] != -1)
11646 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11647 " id %d in section table [in module %s]"),
11648 id
, dwp_file
->name
);
11653 /* Must have exactly one info or types section. */
11654 if (((ids_seen
[DW_SECT_INFO
] != -1)
11655 + (ids_seen
[DW_SECT_TYPES
] != -1))
11658 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11659 " DWO info/types section [in module %s]"),
11662 /* Must have an abbrev section. */
11663 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11665 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11666 " section [in module %s]"),
11669 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11670 htab
->section_pool
.v2
.sizes
=
11671 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11672 * nr_units
* nr_columns
);
11673 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11674 * nr_units
* nr_columns
))
11677 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11678 " [in module %s]"),
11686 /* Update SECTIONS with the data from SECTP.
11688 This function is like the other "locate" section routines that are
11689 passed to bfd_map_over_sections, but in this context the sections to
11690 read comes from the DWP V1 hash table, not the full ELF section table.
11692 The result is non-zero for success, or zero if an error was found. */
11695 locate_v1_virtual_dwo_sections (asection
*sectp
,
11696 struct virtual_v1_dwo_sections
*sections
)
11698 const struct dwop_section_names
*names
= &dwop_section_names
;
11700 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11702 /* There can be only one. */
11703 if (sections
->abbrev
.s
.section
!= NULL
)
11705 sections
->abbrev
.s
.section
= sectp
;
11706 sections
->abbrev
.size
= bfd_section_size (sectp
);
11708 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11709 || section_is_p (sectp
->name
, &names
->types_dwo
))
11711 /* There can be only one. */
11712 if (sections
->info_or_types
.s
.section
!= NULL
)
11714 sections
->info_or_types
.s
.section
= sectp
;
11715 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11717 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11719 /* There can be only one. */
11720 if (sections
->line
.s
.section
!= NULL
)
11722 sections
->line
.s
.section
= sectp
;
11723 sections
->line
.size
= bfd_section_size (sectp
);
11725 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11727 /* There can be only one. */
11728 if (sections
->loc
.s
.section
!= NULL
)
11730 sections
->loc
.s
.section
= sectp
;
11731 sections
->loc
.size
= bfd_section_size (sectp
);
11733 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11735 /* There can be only one. */
11736 if (sections
->macinfo
.s
.section
!= NULL
)
11738 sections
->macinfo
.s
.section
= sectp
;
11739 sections
->macinfo
.size
= bfd_section_size (sectp
);
11741 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11743 /* There can be only one. */
11744 if (sections
->macro
.s
.section
!= NULL
)
11746 sections
->macro
.s
.section
= sectp
;
11747 sections
->macro
.size
= bfd_section_size (sectp
);
11749 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11751 /* There can be only one. */
11752 if (sections
->str_offsets
.s
.section
!= NULL
)
11754 sections
->str_offsets
.s
.section
= sectp
;
11755 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11759 /* No other kind of section is valid. */
11766 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11767 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11768 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11769 This is for DWP version 1 files. */
11771 static struct dwo_unit
*
11772 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11773 struct dwp_file
*dwp_file
,
11774 uint32_t unit_index
,
11775 const char *comp_dir
,
11776 ULONGEST signature
, int is_debug_types
)
11778 const struct dwp_hash_table
*dwp_htab
=
11779 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11780 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11781 const char *kind
= is_debug_types
? "TU" : "CU";
11782 struct dwo_file
*dwo_file
;
11783 struct dwo_unit
*dwo_unit
;
11784 struct virtual_v1_dwo_sections sections
;
11785 void **dwo_file_slot
;
11788 gdb_assert (dwp_file
->version
== 1);
11790 if (dwarf_read_debug
)
11792 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11794 pulongest (unit_index
), hex_string (signature
),
11798 /* Fetch the sections of this DWO unit.
11799 Put a limit on the number of sections we look for so that bad data
11800 doesn't cause us to loop forever. */
11802 #define MAX_NR_V1_DWO_SECTIONS \
11803 (1 /* .debug_info or .debug_types */ \
11804 + 1 /* .debug_abbrev */ \
11805 + 1 /* .debug_line */ \
11806 + 1 /* .debug_loc */ \
11807 + 1 /* .debug_str_offsets */ \
11808 + 1 /* .debug_macro or .debug_macinfo */ \
11809 + 1 /* trailing zero */)
11811 memset (§ions
, 0, sizeof (sections
));
11813 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11816 uint32_t section_nr
=
11817 read_4_bytes (dbfd
,
11818 dwp_htab
->section_pool
.v1
.indices
11819 + (unit_index
+ i
) * sizeof (uint32_t));
11821 if (section_nr
== 0)
11823 if (section_nr
>= dwp_file
->num_sections
)
11825 error (_("Dwarf Error: bad DWP hash table, section number too large"
11826 " [in module %s]"),
11830 sectp
= dwp_file
->elf_sections
[section_nr
];
11831 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11833 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11834 " [in module %s]"),
11840 || sections
.info_or_types
.empty ()
11841 || sections
.abbrev
.empty ())
11843 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11844 " [in module %s]"),
11847 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11849 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11850 " [in module %s]"),
11854 /* It's easier for the rest of the code if we fake a struct dwo_file and
11855 have dwo_unit "live" in that. At least for now.
11857 The DWP file can be made up of a random collection of CUs and TUs.
11858 However, for each CU + set of TUs that came from the same original DWO
11859 file, we can combine them back into a virtual DWO file to save space
11860 (fewer struct dwo_file objects to allocate). Remember that for really
11861 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11863 std::string virtual_dwo_name
=
11864 string_printf ("virtual-dwo/%d-%d-%d-%d",
11865 sections
.abbrev
.get_id (),
11866 sections
.line
.get_id (),
11867 sections
.loc
.get_id (),
11868 sections
.str_offsets
.get_id ());
11869 /* Can we use an existing virtual DWO file? */
11870 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11871 virtual_dwo_name
.c_str (),
11873 /* Create one if necessary. */
11874 if (*dwo_file_slot
== NULL
)
11876 if (dwarf_read_debug
)
11878 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11879 virtual_dwo_name
.c_str ());
11881 dwo_file
= new struct dwo_file
;
11882 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
11883 dwo_file
->comp_dir
= comp_dir
;
11884 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11885 dwo_file
->sections
.line
= sections
.line
;
11886 dwo_file
->sections
.loc
= sections
.loc
;
11887 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11888 dwo_file
->sections
.macro
= sections
.macro
;
11889 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11890 /* The "str" section is global to the entire DWP file. */
11891 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11892 /* The info or types section is assigned below to dwo_unit,
11893 there's no need to record it in dwo_file.
11894 Also, we can't simply record type sections in dwo_file because
11895 we record a pointer into the vector in dwo_unit. As we collect more
11896 types we'll grow the vector and eventually have to reallocate space
11897 for it, invalidating all copies of pointers into the previous
11899 *dwo_file_slot
= dwo_file
;
11903 if (dwarf_read_debug
)
11905 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11906 virtual_dwo_name
.c_str ());
11908 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11911 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
11912 dwo_unit
->dwo_file
= dwo_file
;
11913 dwo_unit
->signature
= signature
;
11914 dwo_unit
->section
=
11915 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
11916 *dwo_unit
->section
= sections
.info_or_types
;
11917 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11922 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11923 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11924 piece within that section used by a TU/CU, return a virtual section
11925 of just that piece. */
11927 static struct dwarf2_section_info
11928 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11929 struct dwarf2_section_info
*section
,
11930 bfd_size_type offset
, bfd_size_type size
)
11932 struct dwarf2_section_info result
;
11935 gdb_assert (section
!= NULL
);
11936 gdb_assert (!section
->is_virtual
);
11938 memset (&result
, 0, sizeof (result
));
11939 result
.s
.containing_section
= section
;
11940 result
.is_virtual
= true;
11945 sectp
= section
->get_bfd_section ();
11947 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11948 bounds of the real section. This is a pretty-rare event, so just
11949 flag an error (easier) instead of a warning and trying to cope. */
11951 || offset
+ size
> bfd_section_size (sectp
))
11953 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11954 " in section %s [in module %s]"),
11955 sectp
? bfd_section_name (sectp
) : "<unknown>",
11956 objfile_name (dwarf2_per_objfile
->objfile
));
11959 result
.virtual_offset
= offset
;
11960 result
.size
= size
;
11964 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11965 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11966 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11967 This is for DWP version 2 files. */
11969 static struct dwo_unit
*
11970 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11971 struct dwp_file
*dwp_file
,
11972 uint32_t unit_index
,
11973 const char *comp_dir
,
11974 ULONGEST signature
, int is_debug_types
)
11976 const struct dwp_hash_table
*dwp_htab
=
11977 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11978 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11979 const char *kind
= is_debug_types
? "TU" : "CU";
11980 struct dwo_file
*dwo_file
;
11981 struct dwo_unit
*dwo_unit
;
11982 struct virtual_v2_dwo_sections sections
;
11983 void **dwo_file_slot
;
11986 gdb_assert (dwp_file
->version
== 2);
11988 if (dwarf_read_debug
)
11990 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11992 pulongest (unit_index
), hex_string (signature
),
11996 /* Fetch the section offsets of this DWO unit. */
11998 memset (§ions
, 0, sizeof (sections
));
12000 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12002 uint32_t offset
= read_4_bytes (dbfd
,
12003 dwp_htab
->section_pool
.v2
.offsets
12004 + (((unit_index
- 1) * dwp_htab
->nr_columns
12006 * sizeof (uint32_t)));
12007 uint32_t size
= read_4_bytes (dbfd
,
12008 dwp_htab
->section_pool
.v2
.sizes
12009 + (((unit_index
- 1) * dwp_htab
->nr_columns
12011 * sizeof (uint32_t)));
12013 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12016 case DW_SECT_TYPES
:
12017 sections
.info_or_types_offset
= offset
;
12018 sections
.info_or_types_size
= size
;
12020 case DW_SECT_ABBREV
:
12021 sections
.abbrev_offset
= offset
;
12022 sections
.abbrev_size
= size
;
12025 sections
.line_offset
= offset
;
12026 sections
.line_size
= size
;
12029 sections
.loc_offset
= offset
;
12030 sections
.loc_size
= size
;
12032 case DW_SECT_STR_OFFSETS
:
12033 sections
.str_offsets_offset
= offset
;
12034 sections
.str_offsets_size
= size
;
12036 case DW_SECT_MACINFO
:
12037 sections
.macinfo_offset
= offset
;
12038 sections
.macinfo_size
= size
;
12040 case DW_SECT_MACRO
:
12041 sections
.macro_offset
= offset
;
12042 sections
.macro_size
= size
;
12047 /* It's easier for the rest of the code if we fake a struct dwo_file and
12048 have dwo_unit "live" in that. At least for now.
12050 The DWP file can be made up of a random collection of CUs and TUs.
12051 However, for each CU + set of TUs that came from the same original DWO
12052 file, we can combine them back into a virtual DWO file to save space
12053 (fewer struct dwo_file objects to allocate). Remember that for really
12054 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12056 std::string virtual_dwo_name
=
12057 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12058 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12059 (long) (sections
.line_size
? sections
.line_offset
: 0),
12060 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12061 (long) (sections
.str_offsets_size
12062 ? sections
.str_offsets_offset
: 0));
12063 /* Can we use an existing virtual DWO file? */
12064 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12065 virtual_dwo_name
.c_str (),
12067 /* Create one if necessary. */
12068 if (*dwo_file_slot
== NULL
)
12070 if (dwarf_read_debug
)
12072 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12073 virtual_dwo_name
.c_str ());
12075 dwo_file
= new struct dwo_file
;
12076 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
12077 dwo_file
->comp_dir
= comp_dir
;
12078 dwo_file
->sections
.abbrev
=
12079 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12080 sections
.abbrev_offset
, sections
.abbrev_size
);
12081 dwo_file
->sections
.line
=
12082 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12083 sections
.line_offset
, sections
.line_size
);
12084 dwo_file
->sections
.loc
=
12085 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12086 sections
.loc_offset
, sections
.loc_size
);
12087 dwo_file
->sections
.macinfo
=
12088 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12089 sections
.macinfo_offset
, sections
.macinfo_size
);
12090 dwo_file
->sections
.macro
=
12091 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12092 sections
.macro_offset
, sections
.macro_size
);
12093 dwo_file
->sections
.str_offsets
=
12094 create_dwp_v2_section (dwarf2_per_objfile
,
12095 &dwp_file
->sections
.str_offsets
,
12096 sections
.str_offsets_offset
,
12097 sections
.str_offsets_size
);
12098 /* The "str" section is global to the entire DWP file. */
12099 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12100 /* The info or types section is assigned below to dwo_unit,
12101 there's no need to record it in dwo_file.
12102 Also, we can't simply record type sections in dwo_file because
12103 we record a pointer into the vector in dwo_unit. As we collect more
12104 types we'll grow the vector and eventually have to reallocate space
12105 for it, invalidating all copies of pointers into the previous
12107 *dwo_file_slot
= dwo_file
;
12111 if (dwarf_read_debug
)
12113 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12114 virtual_dwo_name
.c_str ());
12116 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12119 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12120 dwo_unit
->dwo_file
= dwo_file
;
12121 dwo_unit
->signature
= signature
;
12122 dwo_unit
->section
=
12123 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12124 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12126 ? &dwp_file
->sections
.types
12127 : &dwp_file
->sections
.info
,
12128 sections
.info_or_types_offset
,
12129 sections
.info_or_types_size
);
12130 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12135 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12136 Returns NULL if the signature isn't found. */
12138 static struct dwo_unit
*
12139 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12140 struct dwp_file
*dwp_file
, const char *comp_dir
,
12141 ULONGEST signature
, int is_debug_types
)
12143 const struct dwp_hash_table
*dwp_htab
=
12144 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12145 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12146 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12147 uint32_t hash
= signature
& mask
;
12148 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12151 struct dwo_unit find_dwo_cu
;
12153 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12154 find_dwo_cu
.signature
= signature
;
12155 slot
= htab_find_slot (is_debug_types
12156 ? dwp_file
->loaded_tus
.get ()
12157 : dwp_file
->loaded_cus
.get (),
12158 &find_dwo_cu
, INSERT
);
12161 return (struct dwo_unit
*) *slot
;
12163 /* Use a for loop so that we don't loop forever on bad debug info. */
12164 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12166 ULONGEST signature_in_table
;
12168 signature_in_table
=
12169 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12170 if (signature_in_table
== signature
)
12172 uint32_t unit_index
=
12173 read_4_bytes (dbfd
,
12174 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12176 if (dwp_file
->version
== 1)
12178 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12179 dwp_file
, unit_index
,
12180 comp_dir
, signature
,
12185 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12186 dwp_file
, unit_index
,
12187 comp_dir
, signature
,
12190 return (struct dwo_unit
*) *slot
;
12192 if (signature_in_table
== 0)
12194 hash
= (hash
+ hash2
) & mask
;
12197 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12198 " [in module %s]"),
12202 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12203 Open the file specified by FILE_NAME and hand it off to BFD for
12204 preliminary analysis. Return a newly initialized bfd *, which
12205 includes a canonicalized copy of FILE_NAME.
12206 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12207 SEARCH_CWD is true if the current directory is to be searched.
12208 It will be searched before debug-file-directory.
12209 If successful, the file is added to the bfd include table of the
12210 objfile's bfd (see gdb_bfd_record_inclusion).
12211 If unable to find/open the file, return NULL.
12212 NOTE: This function is derived from symfile_bfd_open. */
12214 static gdb_bfd_ref_ptr
12215 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12216 const char *file_name
, int is_dwp
, int search_cwd
)
12219 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12220 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12221 to debug_file_directory. */
12222 const char *search_path
;
12223 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12225 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12228 if (*debug_file_directory
!= '\0')
12230 search_path_holder
.reset (concat (".", dirname_separator_string
,
12231 debug_file_directory
,
12233 search_path
= search_path_holder
.get ();
12239 search_path
= debug_file_directory
;
12241 openp_flags flags
= OPF_RETURN_REALPATH
;
12243 flags
|= OPF_SEARCH_IN_PATH
;
12245 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12246 desc
= openp (search_path
, flags
, file_name
,
12247 O_RDONLY
| O_BINARY
, &absolute_name
);
12251 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12253 if (sym_bfd
== NULL
)
12255 bfd_set_cacheable (sym_bfd
.get (), 1);
12257 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12260 /* Success. Record the bfd as having been included by the objfile's bfd.
12261 This is important because things like demangled_names_hash lives in the
12262 objfile's per_bfd space and may have references to things like symbol
12263 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12264 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12269 /* Try to open DWO file FILE_NAME.
12270 COMP_DIR is the DW_AT_comp_dir attribute.
12271 The result is the bfd handle of the file.
12272 If there is a problem finding or opening the file, return NULL.
12273 Upon success, the canonicalized path of the file is stored in the bfd,
12274 same as symfile_bfd_open. */
12276 static gdb_bfd_ref_ptr
12277 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12278 const char *file_name
, const char *comp_dir
)
12280 if (IS_ABSOLUTE_PATH (file_name
))
12281 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12282 0 /*is_dwp*/, 0 /*search_cwd*/);
12284 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12286 if (comp_dir
!= NULL
)
12288 gdb::unique_xmalloc_ptr
<char> path_to_try
12289 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12291 /* NOTE: If comp_dir is a relative path, this will also try the
12292 search path, which seems useful. */
12293 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12294 path_to_try
.get (),
12296 1 /*search_cwd*/));
12301 /* That didn't work, try debug-file-directory, which, despite its name,
12302 is a list of paths. */
12304 if (*debug_file_directory
== '\0')
12307 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12308 0 /*is_dwp*/, 1 /*search_cwd*/);
12311 /* This function is mapped across the sections and remembers the offset and
12312 size of each of the DWO debugging sections we are interested in. */
12315 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12317 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12318 const struct dwop_section_names
*names
= &dwop_section_names
;
12320 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12322 dwo_sections
->abbrev
.s
.section
= sectp
;
12323 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12325 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12327 dwo_sections
->info
.s
.section
= sectp
;
12328 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12330 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12332 dwo_sections
->line
.s
.section
= sectp
;
12333 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12335 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12337 dwo_sections
->loc
.s
.section
= sectp
;
12338 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12340 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12342 dwo_sections
->loclists
.s
.section
= sectp
;
12343 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12345 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12347 dwo_sections
->macinfo
.s
.section
= sectp
;
12348 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12350 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12352 dwo_sections
->macro
.s
.section
= sectp
;
12353 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12355 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12357 dwo_sections
->str
.s
.section
= sectp
;
12358 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12360 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12362 dwo_sections
->str_offsets
.s
.section
= sectp
;
12363 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12365 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12367 struct dwarf2_section_info type_section
;
12369 memset (&type_section
, 0, sizeof (type_section
));
12370 type_section
.s
.section
= sectp
;
12371 type_section
.size
= bfd_section_size (sectp
);
12372 dwo_sections
->types
.push_back (type_section
);
12376 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12377 by PER_CU. This is for the non-DWP case.
12378 The result is NULL if DWO_NAME can't be found. */
12380 static struct dwo_file
*
12381 open_and_init_dwo_file (dwarf2_cu
*cu
, const char *dwo_name
,
12382 const char *comp_dir
)
12384 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
12386 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12389 if (dwarf_read_debug
)
12390 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12394 dwo_file_up
dwo_file (new struct dwo_file
);
12395 dwo_file
->dwo_name
= dwo_name
;
12396 dwo_file
->comp_dir
= comp_dir
;
12397 dwo_file
->dbfd
= std::move (dbfd
);
12399 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12400 &dwo_file
->sections
);
12402 create_cus_hash_table (dwarf2_per_objfile
, cu
, *dwo_file
,
12403 dwo_file
->sections
.info
, dwo_file
->cus
);
12405 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12406 dwo_file
->sections
.types
, dwo_file
->tus
);
12408 if (dwarf_read_debug
)
12409 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12411 return dwo_file
.release ();
12414 /* This function is mapped across the sections and remembers the offset and
12415 size of each of the DWP debugging sections common to version 1 and 2 that
12416 we are interested in. */
12419 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12420 void *dwp_file_ptr
)
12422 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12423 const struct dwop_section_names
*names
= &dwop_section_names
;
12424 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12426 /* Record the ELF section number for later lookup: this is what the
12427 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12428 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12429 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12431 /* Look for specific sections that we need. */
12432 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12434 dwp_file
->sections
.str
.s
.section
= sectp
;
12435 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12437 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12439 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12440 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12442 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12444 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12445 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12449 /* This function is mapped across the sections and remembers the offset and
12450 size of each of the DWP version 2 debugging sections that we are interested
12451 in. This is split into a separate function because we don't know if we
12452 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12455 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12457 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12458 const struct dwop_section_names
*names
= &dwop_section_names
;
12459 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12461 /* Record the ELF section number for later lookup: this is what the
12462 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12463 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12464 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12466 /* Look for specific sections that we need. */
12467 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12469 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12470 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12472 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12474 dwp_file
->sections
.info
.s
.section
= sectp
;
12475 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12477 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12479 dwp_file
->sections
.line
.s
.section
= sectp
;
12480 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12482 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12484 dwp_file
->sections
.loc
.s
.section
= sectp
;
12485 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12487 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12489 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12490 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12492 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12494 dwp_file
->sections
.macro
.s
.section
= sectp
;
12495 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12497 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12499 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12500 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12502 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12504 dwp_file
->sections
.types
.s
.section
= sectp
;
12505 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12509 /* Hash function for dwp_file loaded CUs/TUs. */
12512 hash_dwp_loaded_cutus (const void *item
)
12514 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12516 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12517 return dwo_unit
->signature
;
12520 /* Equality function for dwp_file loaded CUs/TUs. */
12523 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12525 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12526 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12528 return dua
->signature
== dub
->signature
;
12531 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12534 allocate_dwp_loaded_cutus_table ()
12536 return htab_up (htab_create_alloc (3,
12537 hash_dwp_loaded_cutus
,
12538 eq_dwp_loaded_cutus
,
12539 NULL
, xcalloc
, xfree
));
12542 /* Try to open DWP file FILE_NAME.
12543 The result is the bfd handle of the file.
12544 If there is a problem finding or opening the file, return NULL.
12545 Upon success, the canonicalized path of the file is stored in the bfd,
12546 same as symfile_bfd_open. */
12548 static gdb_bfd_ref_ptr
12549 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12550 const char *file_name
)
12552 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12554 1 /*search_cwd*/));
12558 /* Work around upstream bug 15652.
12559 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12560 [Whether that's a "bug" is debatable, but it is getting in our way.]
12561 We have no real idea where the dwp file is, because gdb's realpath-ing
12562 of the executable's path may have discarded the needed info.
12563 [IWBN if the dwp file name was recorded in the executable, akin to
12564 .gnu_debuglink, but that doesn't exist yet.]
12565 Strip the directory from FILE_NAME and search again. */
12566 if (*debug_file_directory
!= '\0')
12568 /* Don't implicitly search the current directory here.
12569 If the user wants to search "." to handle this case,
12570 it must be added to debug-file-directory. */
12571 return try_open_dwop_file (dwarf2_per_objfile
,
12572 lbasename (file_name
), 1 /*is_dwp*/,
12579 /* Initialize the use of the DWP file for the current objfile.
12580 By convention the name of the DWP file is ${objfile}.dwp.
12581 The result is NULL if it can't be found. */
12583 static std::unique_ptr
<struct dwp_file
>
12584 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12586 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12588 /* Try to find first .dwp for the binary file before any symbolic links
12591 /* If the objfile is a debug file, find the name of the real binary
12592 file and get the name of dwp file from there. */
12593 std::string dwp_name
;
12594 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12596 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12597 const char *backlink_basename
= lbasename (backlink
->original_name
);
12599 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12602 dwp_name
= objfile
->original_name
;
12604 dwp_name
+= ".dwp";
12606 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12608 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12610 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12611 dwp_name
= objfile_name (objfile
);
12612 dwp_name
+= ".dwp";
12613 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12618 if (dwarf_read_debug
)
12619 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12620 return std::unique_ptr
<dwp_file
> ();
12623 const char *name
= bfd_get_filename (dbfd
.get ());
12624 std::unique_ptr
<struct dwp_file
> dwp_file
12625 (new struct dwp_file (name
, std::move (dbfd
)));
12627 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12628 dwp_file
->elf_sections
=
12629 OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
12630 dwp_file
->num_sections
, asection
*);
12632 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12633 dwarf2_locate_common_dwp_sections
,
12636 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12639 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12642 /* The DWP file version is stored in the hash table. Oh well. */
12643 if (dwp_file
->cus
&& dwp_file
->tus
12644 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12646 /* Technically speaking, we should try to limp along, but this is
12647 pretty bizarre. We use pulongest here because that's the established
12648 portability solution (e.g, we cannot use %u for uint32_t). */
12649 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12650 " TU version %s [in DWP file %s]"),
12651 pulongest (dwp_file
->cus
->version
),
12652 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12656 dwp_file
->version
= dwp_file
->cus
->version
;
12657 else if (dwp_file
->tus
)
12658 dwp_file
->version
= dwp_file
->tus
->version
;
12660 dwp_file
->version
= 2;
12662 if (dwp_file
->version
== 2)
12663 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12664 dwarf2_locate_v2_dwp_sections
,
12667 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12668 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12670 if (dwarf_read_debug
)
12672 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12673 fprintf_unfiltered (gdb_stdlog
,
12674 " %s CUs, %s TUs\n",
12675 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12676 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12682 /* Wrapper around open_and_init_dwp_file, only open it once. */
12684 static struct dwp_file
*
12685 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12687 if (! dwarf2_per_objfile
->per_bfd
->dwp_checked
)
12689 dwarf2_per_objfile
->per_bfd
->dwp_file
12690 = open_and_init_dwp_file (dwarf2_per_objfile
);
12691 dwarf2_per_objfile
->per_bfd
->dwp_checked
= 1;
12693 return dwarf2_per_objfile
->per_bfd
->dwp_file
.get ();
12696 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12697 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12698 or in the DWP file for the objfile, referenced by THIS_UNIT.
12699 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12700 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12702 This is called, for example, when wanting to read a variable with a
12703 complex location. Therefore we don't want to do file i/o for every call.
12704 Therefore we don't want to look for a DWO file on every call.
12705 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12706 then we check if we've already seen DWO_NAME, and only THEN do we check
12709 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12710 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12712 static struct dwo_unit
*
12713 lookup_dwo_cutu (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
12714 ULONGEST signature
, int is_debug_types
)
12716 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
12717 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12718 const char *kind
= is_debug_types
? "TU" : "CU";
12719 void **dwo_file_slot
;
12720 struct dwo_file
*dwo_file
;
12721 struct dwp_file
*dwp_file
;
12723 /* First see if there's a DWP file.
12724 If we have a DWP file but didn't find the DWO inside it, don't
12725 look for the original DWO file. It makes gdb behave differently
12726 depending on whether one is debugging in the build tree. */
12728 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12729 if (dwp_file
!= NULL
)
12731 const struct dwp_hash_table
*dwp_htab
=
12732 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12734 if (dwp_htab
!= NULL
)
12736 struct dwo_unit
*dwo_cutu
=
12737 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12738 signature
, is_debug_types
);
12740 if (dwo_cutu
!= NULL
)
12742 if (dwarf_read_debug
)
12744 fprintf_unfiltered (gdb_stdlog
,
12745 "Virtual DWO %s %s found: @%s\n",
12746 kind
, hex_string (signature
),
12747 host_address_to_string (dwo_cutu
));
12755 /* No DWP file, look for the DWO file. */
12757 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12758 dwo_name
, comp_dir
);
12759 if (*dwo_file_slot
== NULL
)
12761 /* Read in the file and build a table of the CUs/TUs it contains. */
12762 *dwo_file_slot
= open_and_init_dwo_file (cu
, dwo_name
, comp_dir
);
12764 /* NOTE: This will be NULL if unable to open the file. */
12765 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12767 if (dwo_file
!= NULL
)
12769 struct dwo_unit
*dwo_cutu
= NULL
;
12771 if (is_debug_types
&& dwo_file
->tus
)
12773 struct dwo_unit find_dwo_cutu
;
12775 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12776 find_dwo_cutu
.signature
= signature
;
12778 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12781 else if (!is_debug_types
&& dwo_file
->cus
)
12783 struct dwo_unit find_dwo_cutu
;
12785 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12786 find_dwo_cutu
.signature
= signature
;
12787 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12791 if (dwo_cutu
!= NULL
)
12793 if (dwarf_read_debug
)
12795 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12796 kind
, dwo_name
, hex_string (signature
),
12797 host_address_to_string (dwo_cutu
));
12804 /* We didn't find it. This could mean a dwo_id mismatch, or
12805 someone deleted the DWO/DWP file, or the search path isn't set up
12806 correctly to find the file. */
12808 if (dwarf_read_debug
)
12810 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12811 kind
, dwo_name
, hex_string (signature
));
12814 /* This is a warning and not a complaint because it can be caused by
12815 pilot error (e.g., user accidentally deleting the DWO). */
12817 /* Print the name of the DWP file if we looked there, helps the user
12818 better diagnose the problem. */
12819 std::string dwp_text
;
12821 if (dwp_file
!= NULL
)
12822 dwp_text
= string_printf (" [in DWP file %s]",
12823 lbasename (dwp_file
->name
));
12825 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12826 " [in module %s]"),
12827 kind
, dwo_name
, hex_string (signature
), dwp_text
.c_str (), kind
,
12828 sect_offset_str (cu
->per_cu
->sect_off
), objfile_name (objfile
));
12833 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12834 See lookup_dwo_cutu_unit for details. */
12836 static struct dwo_unit
*
12837 lookup_dwo_comp_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
12838 ULONGEST signature
)
12840 gdb_assert (!cu
->per_cu
->is_debug_types
);
12842 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, signature
, 0);
12845 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12846 See lookup_dwo_cutu_unit for details. */
12848 static struct dwo_unit
*
12849 lookup_dwo_type_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
)
12851 gdb_assert (cu
->per_cu
->is_debug_types
);
12853 signatured_type
*sig_type
= (signatured_type
*) cu
->per_cu
;
12855 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, sig_type
->signature
, 1);
12858 /* Traversal function for queue_and_load_all_dwo_tus. */
12861 queue_and_load_dwo_tu (void **slot
, void *info
)
12863 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12864 dwarf2_cu
*cu
= (dwarf2_cu
*) info
;
12865 ULONGEST signature
= dwo_unit
->signature
;
12866 signatured_type
*sig_type
= lookup_dwo_signatured_type (cu
, signature
);
12868 if (sig_type
!= NULL
)
12870 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12872 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12873 a real dependency of PER_CU on SIG_TYPE. That is detected later
12874 while processing PER_CU. */
12875 if (maybe_queue_comp_unit (NULL
, sig_cu
, cu
->per_objfile
, cu
->language
))
12876 load_full_type_unit (sig_cu
, cu
->per_objfile
);
12877 cu
->per_cu
->imported_symtabs_push (sig_cu
);
12883 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12884 The DWO may have the only definition of the type, though it may not be
12885 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12886 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12889 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12891 struct dwo_unit
*dwo_unit
;
12892 struct dwo_file
*dwo_file
;
12894 gdb_assert (!per_cu
->is_debug_types
);
12895 gdb_assert (per_cu
->cu
!= NULL
);
12896 gdb_assert (get_dwp_file (per_cu
->cu
->per_objfile
) == NULL
);
12898 dwo_unit
= per_cu
->cu
->dwo_unit
;
12899 gdb_assert (dwo_unit
!= NULL
);
12901 dwo_file
= dwo_unit
->dwo_file
;
12902 if (dwo_file
->tus
!= NULL
)
12903 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12907 /* Read in various DIEs. */
12909 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12910 Inherit only the children of the DW_AT_abstract_origin DIE not being
12911 already referenced by DW_AT_abstract_origin from the children of the
12915 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12917 struct die_info
*child_die
;
12918 sect_offset
*offsetp
;
12919 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12920 struct die_info
*origin_die
;
12921 /* Iterator of the ORIGIN_DIE children. */
12922 struct die_info
*origin_child_die
;
12923 struct attribute
*attr
;
12924 struct dwarf2_cu
*origin_cu
;
12925 struct pending
**origin_previous_list_in_scope
;
12927 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12931 /* Note that following die references may follow to a die in a
12935 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12937 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12939 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12940 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12942 if (die
->tag
!= origin_die
->tag
12943 && !(die
->tag
== DW_TAG_inlined_subroutine
12944 && origin_die
->tag
== DW_TAG_subprogram
))
12945 complaint (_("DIE %s and its abstract origin %s have different tags"),
12946 sect_offset_str (die
->sect_off
),
12947 sect_offset_str (origin_die
->sect_off
));
12949 std::vector
<sect_offset
> offsets
;
12951 for (child_die
= die
->child
;
12952 child_die
&& child_die
->tag
;
12953 child_die
= child_die
->sibling
)
12955 struct die_info
*child_origin_die
;
12956 struct dwarf2_cu
*child_origin_cu
;
12958 /* We are trying to process concrete instance entries:
12959 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12960 it's not relevant to our analysis here. i.e. detecting DIEs that are
12961 present in the abstract instance but not referenced in the concrete
12963 if (child_die
->tag
== DW_TAG_call_site
12964 || child_die
->tag
== DW_TAG_GNU_call_site
)
12967 /* For each CHILD_DIE, find the corresponding child of
12968 ORIGIN_DIE. If there is more than one layer of
12969 DW_AT_abstract_origin, follow them all; there shouldn't be,
12970 but GCC versions at least through 4.4 generate this (GCC PR
12972 child_origin_die
= child_die
;
12973 child_origin_cu
= cu
;
12976 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12980 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12984 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12985 counterpart may exist. */
12986 if (child_origin_die
!= child_die
)
12988 if (child_die
->tag
!= child_origin_die
->tag
12989 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12990 && child_origin_die
->tag
== DW_TAG_subprogram
))
12991 complaint (_("Child DIE %s and its abstract origin %s have "
12993 sect_offset_str (child_die
->sect_off
),
12994 sect_offset_str (child_origin_die
->sect_off
));
12995 if (child_origin_die
->parent
!= origin_die
)
12996 complaint (_("Child DIE %s and its abstract origin %s have "
12997 "different parents"),
12998 sect_offset_str (child_die
->sect_off
),
12999 sect_offset_str (child_origin_die
->sect_off
));
13001 offsets
.push_back (child_origin_die
->sect_off
);
13004 std::sort (offsets
.begin (), offsets
.end ());
13005 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13006 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13007 if (offsetp
[-1] == *offsetp
)
13008 complaint (_("Multiple children of DIE %s refer "
13009 "to DIE %s as their abstract origin"),
13010 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13012 offsetp
= offsets
.data ();
13013 origin_child_die
= origin_die
->child
;
13014 while (origin_child_die
&& origin_child_die
->tag
)
13016 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13017 while (offsetp
< offsets_end
13018 && *offsetp
< origin_child_die
->sect_off
)
13020 if (offsetp
>= offsets_end
13021 || *offsetp
> origin_child_die
->sect_off
)
13023 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13024 Check whether we're already processing ORIGIN_CHILD_DIE.
13025 This can happen with mutually referenced abstract_origins.
13027 if (!origin_child_die
->in_process
)
13028 process_die (origin_child_die
, origin_cu
);
13030 origin_child_die
= origin_child_die
->sibling
;
13032 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13034 if (cu
!= origin_cu
)
13035 compute_delayed_physnames (origin_cu
);
13039 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13041 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13042 struct gdbarch
*gdbarch
= objfile
->arch ();
13043 struct context_stack
*newobj
;
13046 struct die_info
*child_die
;
13047 struct attribute
*attr
, *call_line
, *call_file
;
13049 CORE_ADDR baseaddr
;
13050 struct block
*block
;
13051 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13052 std::vector
<struct symbol
*> template_args
;
13053 struct template_symbol
*templ_func
= NULL
;
13057 /* If we do not have call site information, we can't show the
13058 caller of this inlined function. That's too confusing, so
13059 only use the scope for local variables. */
13060 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13061 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13062 if (call_line
== NULL
|| call_file
== NULL
)
13064 read_lexical_block_scope (die
, cu
);
13069 baseaddr
= objfile
->text_section_offset ();
13071 name
= dwarf2_name (die
, cu
);
13073 /* Ignore functions with missing or empty names. These are actually
13074 illegal according to the DWARF standard. */
13077 complaint (_("missing name for subprogram DIE at %s"),
13078 sect_offset_str (die
->sect_off
));
13082 /* Ignore functions with missing or invalid low and high pc attributes. */
13083 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13084 <= PC_BOUNDS_INVALID
)
13086 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13087 if (!attr
|| !DW_UNSND (attr
))
13088 complaint (_("cannot get low and high bounds "
13089 "for subprogram DIE at %s"),
13090 sect_offset_str (die
->sect_off
));
13094 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13095 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13097 /* If we have any template arguments, then we must allocate a
13098 different sort of symbol. */
13099 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13101 if (child_die
->tag
== DW_TAG_template_type_param
13102 || child_die
->tag
== DW_TAG_template_value_param
)
13104 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13105 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13110 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13111 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13112 (struct symbol
*) templ_func
);
13114 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13115 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13118 /* If there is a location expression for DW_AT_frame_base, record
13120 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13121 if (attr
!= nullptr)
13122 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13124 /* If there is a location for the static link, record it. */
13125 newobj
->static_link
= NULL
;
13126 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13127 if (attr
!= nullptr)
13129 newobj
->static_link
13130 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13131 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13135 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13137 if (die
->child
!= NULL
)
13139 child_die
= die
->child
;
13140 while (child_die
&& child_die
->tag
)
13142 if (child_die
->tag
== DW_TAG_template_type_param
13143 || child_die
->tag
== DW_TAG_template_value_param
)
13145 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13148 template_args
.push_back (arg
);
13151 process_die (child_die
, cu
);
13152 child_die
= child_die
->sibling
;
13156 inherit_abstract_dies (die
, cu
);
13158 /* If we have a DW_AT_specification, we might need to import using
13159 directives from the context of the specification DIE. See the
13160 comment in determine_prefix. */
13161 if (cu
->language
== language_cplus
13162 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13164 struct dwarf2_cu
*spec_cu
= cu
;
13165 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13169 child_die
= spec_die
->child
;
13170 while (child_die
&& child_die
->tag
)
13172 if (child_die
->tag
== DW_TAG_imported_module
)
13173 process_die (child_die
, spec_cu
);
13174 child_die
= child_die
->sibling
;
13177 /* In some cases, GCC generates specification DIEs that
13178 themselves contain DW_AT_specification attributes. */
13179 spec_die
= die_specification (spec_die
, &spec_cu
);
13183 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13184 /* Make a block for the local symbols within. */
13185 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13186 cstk
.static_link
, lowpc
, highpc
);
13188 /* For C++, set the block's scope. */
13189 if ((cu
->language
== language_cplus
13190 || cu
->language
== language_fortran
13191 || cu
->language
== language_d
13192 || cu
->language
== language_rust
)
13193 && cu
->processing_has_namespace_info
)
13194 block_set_scope (block
, determine_prefix (die
, cu
),
13195 &objfile
->objfile_obstack
);
13197 /* If we have address ranges, record them. */
13198 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13200 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13202 /* Attach template arguments to function. */
13203 if (!template_args
.empty ())
13205 gdb_assert (templ_func
!= NULL
);
13207 templ_func
->n_template_arguments
= template_args
.size ();
13208 templ_func
->template_arguments
13209 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13210 templ_func
->n_template_arguments
);
13211 memcpy (templ_func
->template_arguments
,
13212 template_args
.data (),
13213 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13215 /* Make sure that the symtab is set on the new symbols. Even
13216 though they don't appear in this symtab directly, other parts
13217 of gdb assume that symbols do, and this is reasonably
13219 for (symbol
*sym
: template_args
)
13220 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13223 /* In C++, we can have functions nested inside functions (e.g., when
13224 a function declares a class that has methods). This means that
13225 when we finish processing a function scope, we may need to go
13226 back to building a containing block's symbol lists. */
13227 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13228 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13230 /* If we've finished processing a top-level function, subsequent
13231 symbols go in the file symbol list. */
13232 if (cu
->get_builder ()->outermost_context_p ())
13233 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13236 /* Process all the DIES contained within a lexical block scope. Start
13237 a new scope, process the dies, and then close the scope. */
13240 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13242 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13243 struct gdbarch
*gdbarch
= objfile
->arch ();
13244 CORE_ADDR lowpc
, highpc
;
13245 struct die_info
*child_die
;
13246 CORE_ADDR baseaddr
;
13248 baseaddr
= objfile
->text_section_offset ();
13250 /* Ignore blocks with missing or invalid low and high pc attributes. */
13251 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13252 as multiple lexical blocks? Handling children in a sane way would
13253 be nasty. Might be easier to properly extend generic blocks to
13254 describe ranges. */
13255 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13257 case PC_BOUNDS_NOT_PRESENT
:
13258 /* DW_TAG_lexical_block has no attributes, process its children as if
13259 there was no wrapping by that DW_TAG_lexical_block.
13260 GCC does no longer produces such DWARF since GCC r224161. */
13261 for (child_die
= die
->child
;
13262 child_die
!= NULL
&& child_die
->tag
;
13263 child_die
= child_die
->sibling
)
13265 /* We might already be processing this DIE. This can happen
13266 in an unusual circumstance -- where a subroutine A
13267 appears lexically in another subroutine B, but A actually
13268 inlines B. The recursion is broken here, rather than in
13269 inherit_abstract_dies, because it seems better to simply
13270 drop concrete children here. */
13271 if (!child_die
->in_process
)
13272 process_die (child_die
, cu
);
13275 case PC_BOUNDS_INVALID
:
13278 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13279 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13281 cu
->get_builder ()->push_context (0, lowpc
);
13282 if (die
->child
!= NULL
)
13284 child_die
= die
->child
;
13285 while (child_die
&& child_die
->tag
)
13287 process_die (child_die
, cu
);
13288 child_die
= child_die
->sibling
;
13291 inherit_abstract_dies (die
, cu
);
13292 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13294 if (*cu
->get_builder ()->get_local_symbols () != NULL
13295 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13297 struct block
*block
13298 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13299 cstk
.start_addr
, highpc
);
13301 /* Note that recording ranges after traversing children, as we
13302 do here, means that recording a parent's ranges entails
13303 walking across all its children's ranges as they appear in
13304 the address map, which is quadratic behavior.
13306 It would be nicer to record the parent's ranges before
13307 traversing its children, simply overriding whatever you find
13308 there. But since we don't even decide whether to create a
13309 block until after we've traversed its children, that's hard
13311 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13313 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13314 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13317 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13320 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13322 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13323 struct objfile
*objfile
= per_objfile
->objfile
;
13324 struct gdbarch
*gdbarch
= objfile
->arch ();
13325 CORE_ADDR pc
, baseaddr
;
13326 struct attribute
*attr
;
13327 struct call_site
*call_site
, call_site_local
;
13330 struct die_info
*child_die
;
13332 baseaddr
= objfile
->text_section_offset ();
13334 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13337 /* This was a pre-DWARF-5 GNU extension alias
13338 for DW_AT_call_return_pc. */
13339 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13343 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13344 "DIE %s [in module %s]"),
13345 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13348 pc
= attr
->value_as_address () + baseaddr
;
13349 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13351 if (cu
->call_site_htab
== NULL
)
13352 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13353 NULL
, &objfile
->objfile_obstack
,
13354 hashtab_obstack_allocate
, NULL
);
13355 call_site_local
.pc
= pc
;
13356 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13359 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13360 "DIE %s [in module %s]"),
13361 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13362 objfile_name (objfile
));
13366 /* Count parameters at the caller. */
13369 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13370 child_die
= child_die
->sibling
)
13372 if (child_die
->tag
!= DW_TAG_call_site_parameter
13373 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13375 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13376 "DW_TAG_call_site child DIE %s [in module %s]"),
13377 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13378 objfile_name (objfile
));
13386 = ((struct call_site
*)
13387 obstack_alloc (&objfile
->objfile_obstack
,
13388 sizeof (*call_site
)
13389 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13391 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13392 call_site
->pc
= pc
;
13394 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13395 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13397 struct die_info
*func_die
;
13399 /* Skip also over DW_TAG_inlined_subroutine. */
13400 for (func_die
= die
->parent
;
13401 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13402 && func_die
->tag
!= DW_TAG_subroutine_type
;
13403 func_die
= func_die
->parent
);
13405 /* DW_AT_call_all_calls is a superset
13406 of DW_AT_call_all_tail_calls. */
13408 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13409 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13410 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13411 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13413 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13414 not complete. But keep CALL_SITE for look ups via call_site_htab,
13415 both the initial caller containing the real return address PC and
13416 the final callee containing the current PC of a chain of tail
13417 calls do not need to have the tail call list complete. But any
13418 function candidate for a virtual tail call frame searched via
13419 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13420 determined unambiguously. */
13424 struct type
*func_type
= NULL
;
13427 func_type
= get_die_type (func_die
, cu
);
13428 if (func_type
!= NULL
)
13430 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13432 /* Enlist this call site to the function. */
13433 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13434 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13437 complaint (_("Cannot find function owning DW_TAG_call_site "
13438 "DIE %s [in module %s]"),
13439 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13443 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13445 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13447 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13450 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13451 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13453 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13454 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13455 /* Keep NULL DWARF_BLOCK. */;
13456 else if (attr
->form_is_block ())
13458 struct dwarf2_locexpr_baton
*dlbaton
;
13460 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13461 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13462 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13463 dlbaton
->per_objfile
= per_objfile
;
13464 dlbaton
->per_cu
= cu
->per_cu
;
13466 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13468 else if (attr
->form_is_ref ())
13470 struct dwarf2_cu
*target_cu
= cu
;
13471 struct die_info
*target_die
;
13473 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13474 gdb_assert (target_cu
->per_objfile
->objfile
== objfile
);
13475 if (die_is_declaration (target_die
, target_cu
))
13477 const char *target_physname
;
13479 /* Prefer the mangled name; otherwise compute the demangled one. */
13480 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13481 if (target_physname
== NULL
)
13482 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13483 if (target_physname
== NULL
)
13484 complaint (_("DW_AT_call_target target DIE has invalid "
13485 "physname, for referencing DIE %s [in module %s]"),
13486 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13488 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13494 /* DW_AT_entry_pc should be preferred. */
13495 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13496 <= PC_BOUNDS_INVALID
)
13497 complaint (_("DW_AT_call_target target DIE has invalid "
13498 "low pc, for referencing DIE %s [in module %s]"),
13499 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13502 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13503 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13508 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13509 "block nor reference, for DIE %s [in module %s]"),
13510 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13512 call_site
->per_cu
= cu
->per_cu
;
13513 call_site
->per_objfile
= per_objfile
;
13515 for (child_die
= die
->child
;
13516 child_die
&& child_die
->tag
;
13517 child_die
= child_die
->sibling
)
13519 struct call_site_parameter
*parameter
;
13520 struct attribute
*loc
, *origin
;
13522 if (child_die
->tag
!= DW_TAG_call_site_parameter
13523 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13525 /* Already printed the complaint above. */
13529 gdb_assert (call_site
->parameter_count
< nparams
);
13530 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13532 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13533 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13534 register is contained in DW_AT_call_value. */
13536 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13537 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13538 if (origin
== NULL
)
13540 /* This was a pre-DWARF-5 GNU extension alias
13541 for DW_AT_call_parameter. */
13542 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13544 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13546 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13548 sect_offset sect_off
= origin
->get_ref_die_offset ();
13549 if (!cu
->header
.offset_in_cu_p (sect_off
))
13551 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13552 binding can be done only inside one CU. Such referenced DIE
13553 therefore cannot be even moved to DW_TAG_partial_unit. */
13554 complaint (_("DW_AT_call_parameter offset is not in CU for "
13555 "DW_TAG_call_site child DIE %s [in module %s]"),
13556 sect_offset_str (child_die
->sect_off
),
13557 objfile_name (objfile
));
13560 parameter
->u
.param_cu_off
13561 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13563 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13565 complaint (_("No DW_FORM_block* DW_AT_location for "
13566 "DW_TAG_call_site child DIE %s [in module %s]"),
13567 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13572 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13573 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13574 if (parameter
->u
.dwarf_reg
!= -1)
13575 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13576 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13577 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13578 ¶meter
->u
.fb_offset
))
13579 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13582 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13583 "for DW_FORM_block* DW_AT_location is supported for "
13584 "DW_TAG_call_site child DIE %s "
13586 sect_offset_str (child_die
->sect_off
),
13587 objfile_name (objfile
));
13592 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13594 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13595 if (attr
== NULL
|| !attr
->form_is_block ())
13597 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13598 "DW_TAG_call_site child DIE %s [in module %s]"),
13599 sect_offset_str (child_die
->sect_off
),
13600 objfile_name (objfile
));
13603 parameter
->value
= DW_BLOCK (attr
)->data
;
13604 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13606 /* Parameters are not pre-cleared by memset above. */
13607 parameter
->data_value
= NULL
;
13608 parameter
->data_value_size
= 0;
13609 call_site
->parameter_count
++;
13611 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13613 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13614 if (attr
!= nullptr)
13616 if (!attr
->form_is_block ())
13617 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13618 "DW_TAG_call_site child DIE %s [in module %s]"),
13619 sect_offset_str (child_die
->sect_off
),
13620 objfile_name (objfile
));
13623 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13624 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13630 /* Helper function for read_variable. If DIE represents a virtual
13631 table, then return the type of the concrete object that is
13632 associated with the virtual table. Otherwise, return NULL. */
13634 static struct type
*
13635 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13637 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13641 /* Find the type DIE. */
13642 struct die_info
*type_die
= NULL
;
13643 struct dwarf2_cu
*type_cu
= cu
;
13645 if (attr
->form_is_ref ())
13646 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13647 if (type_die
== NULL
)
13650 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13652 return die_containing_type (type_die
, type_cu
);
13655 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13658 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13660 struct rust_vtable_symbol
*storage
= NULL
;
13662 if (cu
->language
== language_rust
)
13664 struct type
*containing_type
= rust_containing_type (die
, cu
);
13666 if (containing_type
!= NULL
)
13668 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13670 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
13671 storage
->concrete_type
= containing_type
;
13672 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13676 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13677 struct attribute
*abstract_origin
13678 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13679 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13680 if (res
== NULL
&& loc
&& abstract_origin
)
13682 /* We have a variable without a name, but with a location and an abstract
13683 origin. This may be a concrete instance of an abstract variable
13684 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13686 struct dwarf2_cu
*origin_cu
= cu
;
13687 struct die_info
*origin_die
13688 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13689 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13690 per_objfile
->per_bfd
->abstract_to_concrete
13691 [origin_die
->sect_off
].push_back (die
->sect_off
);
13695 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13696 reading .debug_rnglists.
13697 Callback's type should be:
13698 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13699 Return true if the attributes are present and valid, otherwise,
13702 template <typename Callback
>
13704 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13705 Callback
&&callback
)
13707 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
13708 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13709 bfd
*obfd
= objfile
->obfd
;
13710 /* Base address selection entry. */
13711 gdb::optional
<CORE_ADDR
> base
;
13712 const gdb_byte
*buffer
;
13713 CORE_ADDR baseaddr
;
13714 bool overflow
= false;
13716 base
= cu
->base_address
;
13718 dwarf2_per_objfile
->per_bfd
->rnglists
.read (objfile
);
13719 if (offset
>= dwarf2_per_objfile
->per_bfd
->rnglists
.size
)
13721 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13725 buffer
= dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
+ offset
;
13727 baseaddr
= objfile
->text_section_offset ();
13731 /* Initialize it due to a false compiler warning. */
13732 CORE_ADDR range_beginning
= 0, range_end
= 0;
13733 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
13734 + dwarf2_per_objfile
->per_bfd
->rnglists
.size
);
13735 unsigned int bytes_read
;
13737 if (buffer
== buf_end
)
13742 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13745 case DW_RLE_end_of_list
:
13747 case DW_RLE_base_address
:
13748 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13753 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13754 buffer
+= bytes_read
;
13756 case DW_RLE_start_length
:
13757 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13762 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13764 buffer
+= bytes_read
;
13765 range_end
= (range_beginning
13766 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13767 buffer
+= bytes_read
;
13768 if (buffer
> buf_end
)
13774 case DW_RLE_offset_pair
:
13775 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13776 buffer
+= bytes_read
;
13777 if (buffer
> buf_end
)
13782 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13783 buffer
+= bytes_read
;
13784 if (buffer
> buf_end
)
13790 case DW_RLE_start_end
:
13791 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13796 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13798 buffer
+= bytes_read
;
13799 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13800 buffer
+= bytes_read
;
13803 complaint (_("Invalid .debug_rnglists data (no base address)"));
13806 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13808 if (rlet
== DW_RLE_base_address
)
13811 if (!base
.has_value ())
13813 /* We have no valid base address for the ranges
13815 complaint (_("Invalid .debug_rnglists data (no base address)"));
13819 if (range_beginning
> range_end
)
13821 /* Inverted range entries are invalid. */
13822 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13826 /* Empty range entries have no effect. */
13827 if (range_beginning
== range_end
)
13830 range_beginning
+= *base
;
13831 range_end
+= *base
;
13833 /* A not-uncommon case of bad debug info.
13834 Don't pollute the addrmap with bad data. */
13835 if (range_beginning
+ baseaddr
== 0
13836 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
13838 complaint (_(".debug_rnglists entry has start address of zero"
13839 " [in module %s]"), objfile_name (objfile
));
13843 callback (range_beginning
, range_end
);
13848 complaint (_("Offset %d is not terminated "
13849 "for DW_AT_ranges attribute"),
13857 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13858 Callback's type should be:
13859 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13860 Return 1 if the attributes are present and valid, otherwise, return 0. */
13862 template <typename Callback
>
13864 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13865 Callback
&&callback
)
13867 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13868 struct objfile
*objfile
= per_objfile
->objfile
;
13869 struct comp_unit_head
*cu_header
= &cu
->header
;
13870 bfd
*obfd
= objfile
->obfd
;
13871 unsigned int addr_size
= cu_header
->addr_size
;
13872 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13873 /* Base address selection entry. */
13874 gdb::optional
<CORE_ADDR
> base
;
13875 unsigned int dummy
;
13876 const gdb_byte
*buffer
;
13877 CORE_ADDR baseaddr
;
13879 if (cu_header
->version
>= 5)
13880 return dwarf2_rnglists_process (offset
, cu
, callback
);
13882 base
= cu
->base_address
;
13884 per_objfile
->per_bfd
->ranges
.read (objfile
);
13885 if (offset
>= per_objfile
->per_bfd
->ranges
.size
)
13887 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13891 buffer
= per_objfile
->per_bfd
->ranges
.buffer
+ offset
;
13893 baseaddr
= objfile
->text_section_offset ();
13897 CORE_ADDR range_beginning
, range_end
;
13899 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13900 buffer
+= addr_size
;
13901 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13902 buffer
+= addr_size
;
13903 offset
+= 2 * addr_size
;
13905 /* An end of list marker is a pair of zero addresses. */
13906 if (range_beginning
== 0 && range_end
== 0)
13907 /* Found the end of list entry. */
13910 /* Each base address selection entry is a pair of 2 values.
13911 The first is the largest possible address, the second is
13912 the base address. Check for a base address here. */
13913 if ((range_beginning
& mask
) == mask
)
13915 /* If we found the largest possible address, then we already
13916 have the base address in range_end. */
13921 if (!base
.has_value ())
13923 /* We have no valid base address for the ranges
13925 complaint (_("Invalid .debug_ranges data (no base address)"));
13929 if (range_beginning
> range_end
)
13931 /* Inverted range entries are invalid. */
13932 complaint (_("Invalid .debug_ranges data (inverted range)"));
13936 /* Empty range entries have no effect. */
13937 if (range_beginning
== range_end
)
13940 range_beginning
+= *base
;
13941 range_end
+= *base
;
13943 /* A not-uncommon case of bad debug info.
13944 Don't pollute the addrmap with bad data. */
13945 if (range_beginning
+ baseaddr
== 0
13946 && !per_objfile
->per_bfd
->has_section_at_zero
)
13948 complaint (_(".debug_ranges entry has start address of zero"
13949 " [in module %s]"), objfile_name (objfile
));
13953 callback (range_beginning
, range_end
);
13959 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13960 Return 1 if the attributes are present and valid, otherwise, return 0.
13961 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13964 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13965 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13966 dwarf2_psymtab
*ranges_pst
)
13968 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13969 struct gdbarch
*gdbarch
= objfile
->arch ();
13970 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13973 CORE_ADDR high
= 0;
13976 retval
= dwarf2_ranges_process (offset
, cu
,
13977 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13979 if (ranges_pst
!= NULL
)
13984 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13985 range_beginning
+ baseaddr
)
13987 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13988 range_end
+ baseaddr
)
13990 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13991 lowpc
, highpc
- 1, ranges_pst
);
13994 /* FIXME: This is recording everything as a low-high
13995 segment of consecutive addresses. We should have a
13996 data structure for discontiguous block ranges
14000 low
= range_beginning
;
14006 if (range_beginning
< low
)
14007 low
= range_beginning
;
14008 if (range_end
> high
)
14016 /* If the first entry is an end-of-list marker, the range
14017 describes an empty scope, i.e. no instructions. */
14023 *high_return
= high
;
14027 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14028 definition for the return value. *LOWPC and *HIGHPC are set iff
14029 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14031 static enum pc_bounds_kind
14032 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14033 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14034 dwarf2_psymtab
*pst
)
14036 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
14037 struct attribute
*attr
;
14038 struct attribute
*attr_high
;
14040 CORE_ADDR high
= 0;
14041 enum pc_bounds_kind ret
;
14043 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14046 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14047 if (attr
!= nullptr)
14049 low
= attr
->value_as_address ();
14050 high
= attr_high
->value_as_address ();
14051 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14055 /* Found high w/o low attribute. */
14056 return PC_BOUNDS_INVALID
;
14058 /* Found consecutive range of addresses. */
14059 ret
= PC_BOUNDS_HIGH_LOW
;
14063 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14066 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14067 We take advantage of the fact that DW_AT_ranges does not appear
14068 in DW_TAG_compile_unit of DWO files. */
14069 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14070 unsigned int ranges_offset
= (DW_UNSND (attr
)
14071 + (need_ranges_base
14075 /* Value of the DW_AT_ranges attribute is the offset in the
14076 .debug_ranges section. */
14077 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14078 return PC_BOUNDS_INVALID
;
14079 /* Found discontinuous range of addresses. */
14080 ret
= PC_BOUNDS_RANGES
;
14083 return PC_BOUNDS_NOT_PRESENT
;
14086 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14088 return PC_BOUNDS_INVALID
;
14090 /* When using the GNU linker, .gnu.linkonce. sections are used to
14091 eliminate duplicate copies of functions and vtables and such.
14092 The linker will arbitrarily choose one and discard the others.
14093 The AT_*_pc values for such functions refer to local labels in
14094 these sections. If the section from that file was discarded, the
14095 labels are not in the output, so the relocs get a value of 0.
14096 If this is a discarded function, mark the pc bounds as invalid,
14097 so that GDB will ignore it. */
14098 if (low
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
14099 return PC_BOUNDS_INVALID
;
14107 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14108 its low and high PC addresses. Do nothing if these addresses could not
14109 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14110 and HIGHPC to the high address if greater than HIGHPC. */
14113 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14114 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14115 struct dwarf2_cu
*cu
)
14117 CORE_ADDR low
, high
;
14118 struct die_info
*child
= die
->child
;
14120 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14122 *lowpc
= std::min (*lowpc
, low
);
14123 *highpc
= std::max (*highpc
, high
);
14126 /* If the language does not allow nested subprograms (either inside
14127 subprograms or lexical blocks), we're done. */
14128 if (cu
->language
!= language_ada
)
14131 /* Check all the children of the given DIE. If it contains nested
14132 subprograms, then check their pc bounds. Likewise, we need to
14133 check lexical blocks as well, as they may also contain subprogram
14135 while (child
&& child
->tag
)
14137 if (child
->tag
== DW_TAG_subprogram
14138 || child
->tag
== DW_TAG_lexical_block
)
14139 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14140 child
= child
->sibling
;
14144 /* Get the low and high pc's represented by the scope DIE, and store
14145 them in *LOWPC and *HIGHPC. If the correct values can't be
14146 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14149 get_scope_pc_bounds (struct die_info
*die
,
14150 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14151 struct dwarf2_cu
*cu
)
14153 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14154 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14155 CORE_ADDR current_low
, current_high
;
14157 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14158 >= PC_BOUNDS_RANGES
)
14160 best_low
= current_low
;
14161 best_high
= current_high
;
14165 struct die_info
*child
= die
->child
;
14167 while (child
&& child
->tag
)
14169 switch (child
->tag
) {
14170 case DW_TAG_subprogram
:
14171 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14173 case DW_TAG_namespace
:
14174 case DW_TAG_module
:
14175 /* FIXME: carlton/2004-01-16: Should we do this for
14176 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14177 that current GCC's always emit the DIEs corresponding
14178 to definitions of methods of classes as children of a
14179 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14180 the DIEs giving the declarations, which could be
14181 anywhere). But I don't see any reason why the
14182 standards says that they have to be there. */
14183 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14185 if (current_low
!= ((CORE_ADDR
) -1))
14187 best_low
= std::min (best_low
, current_low
);
14188 best_high
= std::max (best_high
, current_high
);
14196 child
= child
->sibling
;
14201 *highpc
= best_high
;
14204 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14208 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14209 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14211 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14212 struct gdbarch
*gdbarch
= objfile
->arch ();
14213 struct attribute
*attr
;
14214 struct attribute
*attr_high
;
14216 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14219 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14220 if (attr
!= nullptr)
14222 CORE_ADDR low
= attr
->value_as_address ();
14223 CORE_ADDR high
= attr_high
->value_as_address ();
14225 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14228 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14229 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14230 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14234 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14235 if (attr
!= nullptr)
14237 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14238 We take advantage of the fact that DW_AT_ranges does not appear
14239 in DW_TAG_compile_unit of DWO files. */
14240 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14242 /* The value of the DW_AT_ranges attribute is the offset of the
14243 address range list in the .debug_ranges section. */
14244 unsigned long offset
= (DW_UNSND (attr
)
14245 + (need_ranges_base
? cu
->ranges_base
: 0));
14247 std::vector
<blockrange
> blockvec
;
14248 dwarf2_ranges_process (offset
, cu
,
14249 [&] (CORE_ADDR start
, CORE_ADDR end
)
14253 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14254 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14255 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14256 blockvec
.emplace_back (start
, end
);
14259 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14263 /* Check whether the producer field indicates either of GCC < 4.6, or the
14264 Intel C/C++ compiler, and cache the result in CU. */
14267 check_producer (struct dwarf2_cu
*cu
)
14271 if (cu
->producer
== NULL
)
14273 /* For unknown compilers expect their behavior is DWARF version
14276 GCC started to support .debug_types sections by -gdwarf-4 since
14277 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14278 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14279 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14280 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14282 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14284 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14285 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14287 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14289 cu
->producer_is_icc
= true;
14290 cu
->producer_is_icc_lt_14
= major
< 14;
14292 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14293 cu
->producer_is_codewarrior
= true;
14296 /* For other non-GCC compilers, expect their behavior is DWARF version
14300 cu
->checked_producer
= true;
14303 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14304 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14305 during 4.6.0 experimental. */
14308 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14310 if (!cu
->checked_producer
)
14311 check_producer (cu
);
14313 return cu
->producer_is_gxx_lt_4_6
;
14317 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14318 with incorrect is_stmt attributes. */
14321 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14323 if (!cu
->checked_producer
)
14324 check_producer (cu
);
14326 return cu
->producer_is_codewarrior
;
14329 /* Return the default accessibility type if it is not overridden by
14330 DW_AT_accessibility. */
14332 static enum dwarf_access_attribute
14333 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14335 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14337 /* The default DWARF 2 accessibility for members is public, the default
14338 accessibility for inheritance is private. */
14340 if (die
->tag
!= DW_TAG_inheritance
)
14341 return DW_ACCESS_public
;
14343 return DW_ACCESS_private
;
14347 /* DWARF 3+ defines the default accessibility a different way. The same
14348 rules apply now for DW_TAG_inheritance as for the members and it only
14349 depends on the container kind. */
14351 if (die
->parent
->tag
== DW_TAG_class_type
)
14352 return DW_ACCESS_private
;
14354 return DW_ACCESS_public
;
14358 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14359 offset. If the attribute was not found return 0, otherwise return
14360 1. If it was found but could not properly be handled, set *OFFSET
14364 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14367 struct attribute
*attr
;
14369 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14374 /* Note that we do not check for a section offset first here.
14375 This is because DW_AT_data_member_location is new in DWARF 4,
14376 so if we see it, we can assume that a constant form is really
14377 a constant and not a section offset. */
14378 if (attr
->form_is_constant ())
14379 *offset
= attr
->constant_value (0);
14380 else if (attr
->form_is_section_offset ())
14381 dwarf2_complex_location_expr_complaint ();
14382 else if (attr
->form_is_block ())
14383 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14385 dwarf2_complex_location_expr_complaint ();
14393 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14396 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14397 struct field
*field
)
14399 struct attribute
*attr
;
14401 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14404 if (attr
->form_is_constant ())
14406 LONGEST offset
= attr
->constant_value (0);
14407 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14409 else if (attr
->form_is_section_offset ())
14410 dwarf2_complex_location_expr_complaint ();
14411 else if (attr
->form_is_block ())
14414 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14416 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14419 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14420 struct objfile
*objfile
= per_objfile
->objfile
;
14421 struct dwarf2_locexpr_baton
*dlbaton
14422 = XOBNEW (&objfile
->objfile_obstack
,
14423 struct dwarf2_locexpr_baton
);
14424 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14425 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14426 /* When using this baton, we want to compute the address
14427 of the field, not the value. This is why
14428 is_reference is set to false here. */
14429 dlbaton
->is_reference
= false;
14430 dlbaton
->per_objfile
= per_objfile
;
14431 dlbaton
->per_cu
= cu
->per_cu
;
14433 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14437 dwarf2_complex_location_expr_complaint ();
14441 /* Add an aggregate field to the field list. */
14444 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14445 struct dwarf2_cu
*cu
)
14447 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14448 struct gdbarch
*gdbarch
= objfile
->arch ();
14449 struct nextfield
*new_field
;
14450 struct attribute
*attr
;
14452 const char *fieldname
= "";
14454 if (die
->tag
== DW_TAG_inheritance
)
14456 fip
->baseclasses
.emplace_back ();
14457 new_field
= &fip
->baseclasses
.back ();
14461 fip
->fields
.emplace_back ();
14462 new_field
= &fip
->fields
.back ();
14465 new_field
->offset
= die
->sect_off
;
14467 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14468 if (attr
!= nullptr)
14469 new_field
->accessibility
= DW_UNSND (attr
);
14471 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14472 if (new_field
->accessibility
!= DW_ACCESS_public
)
14473 fip
->non_public_fields
= 1;
14475 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14476 if (attr
!= nullptr)
14477 new_field
->virtuality
= DW_UNSND (attr
);
14479 new_field
->virtuality
= DW_VIRTUALITY_none
;
14481 fp
= &new_field
->field
;
14483 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14485 /* Data member other than a C++ static data member. */
14487 /* Get type of field. */
14488 fp
->type
= die_type (die
, cu
);
14490 SET_FIELD_BITPOS (*fp
, 0);
14492 /* Get bit size of field (zero if none). */
14493 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14494 if (attr
!= nullptr)
14496 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14500 FIELD_BITSIZE (*fp
) = 0;
14503 /* Get bit offset of field. */
14504 handle_data_member_location (die
, cu
, fp
);
14505 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14506 if (attr
!= nullptr)
14508 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14510 /* For big endian bits, the DW_AT_bit_offset gives the
14511 additional bit offset from the MSB of the containing
14512 anonymous object to the MSB of the field. We don't
14513 have to do anything special since we don't need to
14514 know the size of the anonymous object. */
14515 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14519 /* For little endian bits, compute the bit offset to the
14520 MSB of the anonymous object, subtract off the number of
14521 bits from the MSB of the field to the MSB of the
14522 object, and then subtract off the number of bits of
14523 the field itself. The result is the bit offset of
14524 the LSB of the field. */
14525 int anonymous_size
;
14526 int bit_offset
= DW_UNSND (attr
);
14528 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14529 if (attr
!= nullptr)
14531 /* The size of the anonymous object containing
14532 the bit field is explicit, so use the
14533 indicated size (in bytes). */
14534 anonymous_size
= DW_UNSND (attr
);
14538 /* The size of the anonymous object containing
14539 the bit field must be inferred from the type
14540 attribute of the data member containing the
14542 anonymous_size
= TYPE_LENGTH (fp
->type
);
14544 SET_FIELD_BITPOS (*fp
,
14545 (FIELD_BITPOS (*fp
)
14546 + anonymous_size
* bits_per_byte
14547 - bit_offset
- FIELD_BITSIZE (*fp
)));
14550 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14552 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14553 + attr
->constant_value (0)));
14555 /* Get name of field. */
14556 fieldname
= dwarf2_name (die
, cu
);
14557 if (fieldname
== NULL
)
14560 /* The name is already allocated along with this objfile, so we don't
14561 need to duplicate it for the type. */
14562 fp
->name
= fieldname
;
14564 /* Change accessibility for artificial fields (e.g. virtual table
14565 pointer or virtual base class pointer) to private. */
14566 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14568 FIELD_ARTIFICIAL (*fp
) = 1;
14569 new_field
->accessibility
= DW_ACCESS_private
;
14570 fip
->non_public_fields
= 1;
14573 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14575 /* C++ static member. */
14577 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14578 is a declaration, but all versions of G++ as of this writing
14579 (so through at least 3.2.1) incorrectly generate
14580 DW_TAG_variable tags. */
14582 const char *physname
;
14584 /* Get name of field. */
14585 fieldname
= dwarf2_name (die
, cu
);
14586 if (fieldname
== NULL
)
14589 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14591 /* Only create a symbol if this is an external value.
14592 new_symbol checks this and puts the value in the global symbol
14593 table, which we want. If it is not external, new_symbol
14594 will try to put the value in cu->list_in_scope which is wrong. */
14595 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14597 /* A static const member, not much different than an enum as far as
14598 we're concerned, except that we can support more types. */
14599 new_symbol (die
, NULL
, cu
);
14602 /* Get physical name. */
14603 physname
= dwarf2_physname (fieldname
, die
, cu
);
14605 /* The name is already allocated along with this objfile, so we don't
14606 need to duplicate it for the type. */
14607 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14608 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14609 FIELD_NAME (*fp
) = fieldname
;
14611 else if (die
->tag
== DW_TAG_inheritance
)
14613 /* C++ base class field. */
14614 handle_data_member_location (die
, cu
, fp
);
14615 FIELD_BITSIZE (*fp
) = 0;
14616 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14617 FIELD_NAME (*fp
) = fp
->type
->name ();
14620 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14623 /* Can the type given by DIE define another type? */
14626 type_can_define_types (const struct die_info
*die
)
14630 case DW_TAG_typedef
:
14631 case DW_TAG_class_type
:
14632 case DW_TAG_structure_type
:
14633 case DW_TAG_union_type
:
14634 case DW_TAG_enumeration_type
:
14642 /* Add a type definition defined in the scope of the FIP's class. */
14645 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14646 struct dwarf2_cu
*cu
)
14648 struct decl_field fp
;
14649 memset (&fp
, 0, sizeof (fp
));
14651 gdb_assert (type_can_define_types (die
));
14653 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14654 fp
.name
= dwarf2_name (die
, cu
);
14655 fp
.type
= read_type_die (die
, cu
);
14657 /* Save accessibility. */
14658 enum dwarf_access_attribute accessibility
;
14659 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14661 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14663 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14664 switch (accessibility
)
14666 case DW_ACCESS_public
:
14667 /* The assumed value if neither private nor protected. */
14669 case DW_ACCESS_private
:
14672 case DW_ACCESS_protected
:
14673 fp
.is_protected
= 1;
14676 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14679 if (die
->tag
== DW_TAG_typedef
)
14680 fip
->typedef_field_list
.push_back (fp
);
14682 fip
->nested_types_list
.push_back (fp
);
14685 /* A convenience typedef that's used when finding the discriminant
14686 field for a variant part. */
14687 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14690 /* Compute the discriminant range for a given variant. OBSTACK is
14691 where the results will be stored. VARIANT is the variant to
14692 process. IS_UNSIGNED indicates whether the discriminant is signed
14695 static const gdb::array_view
<discriminant_range
>
14696 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14699 std::vector
<discriminant_range
> ranges
;
14701 if (variant
.default_branch
)
14704 if (variant
.discr_list_data
== nullptr)
14706 discriminant_range r
14707 = {variant
.discriminant_value
, variant
.discriminant_value
};
14708 ranges
.push_back (r
);
14712 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14713 variant
.discr_list_data
->size
);
14714 while (!data
.empty ())
14716 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14718 complaint (_("invalid discriminant marker: %d"), data
[0]);
14721 bool is_range
= data
[0] == DW_DSC_range
;
14722 data
= data
.slice (1);
14724 ULONGEST low
, high
;
14725 unsigned int bytes_read
;
14729 complaint (_("DW_AT_discr_list missing low value"));
14733 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14735 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14737 data
= data
.slice (bytes_read
);
14743 complaint (_("DW_AT_discr_list missing high value"));
14747 high
= read_unsigned_leb128 (nullptr, data
.data (),
14750 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14752 data
= data
.slice (bytes_read
);
14757 ranges
.push_back ({ low
, high
});
14761 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14763 std::copy (ranges
.begin (), ranges
.end (), result
);
14764 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14767 static const gdb::array_view
<variant_part
> create_variant_parts
14768 (struct obstack
*obstack
,
14769 const offset_map_type
&offset_map
,
14770 struct field_info
*fi
,
14771 const std::vector
<variant_part_builder
> &variant_parts
);
14773 /* Fill in a "struct variant" for a given variant field. RESULT is
14774 the variant to fill in. OBSTACK is where any needed allocations
14775 will be done. OFFSET_MAP holds the mapping from section offsets to
14776 fields for the type. FI describes the fields of the type we're
14777 processing. FIELD is the variant field we're converting. */
14780 create_one_variant (variant
&result
, struct obstack
*obstack
,
14781 const offset_map_type
&offset_map
,
14782 struct field_info
*fi
, const variant_field
&field
)
14784 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14785 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14786 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14787 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14788 field
.variant_parts
);
14791 /* Fill in a "struct variant_part" for a given variant part. RESULT
14792 is the variant part to fill in. OBSTACK is where any needed
14793 allocations will be done. OFFSET_MAP holds the mapping from
14794 section offsets to fields for the type. FI describes the fields of
14795 the type we're processing. BUILDER is the variant part to be
14799 create_one_variant_part (variant_part
&result
,
14800 struct obstack
*obstack
,
14801 const offset_map_type
&offset_map
,
14802 struct field_info
*fi
,
14803 const variant_part_builder
&builder
)
14805 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14806 if (iter
== offset_map
.end ())
14808 result
.discriminant_index
= -1;
14809 /* Doesn't matter. */
14810 result
.is_unsigned
= false;
14814 result
.discriminant_index
= iter
->second
;
14816 = TYPE_UNSIGNED (FIELD_TYPE
14817 (fi
->fields
[result
.discriminant_index
].field
));
14820 size_t n
= builder
.variants
.size ();
14821 variant
*output
= new (obstack
) variant
[n
];
14822 for (size_t i
= 0; i
< n
; ++i
)
14823 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14824 builder
.variants
[i
]);
14826 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14829 /* Create a vector of variant parts that can be attached to a type.
14830 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14831 holds the mapping from section offsets to fields for the type. FI
14832 describes the fields of the type we're processing. VARIANT_PARTS
14833 is the vector to convert. */
14835 static const gdb::array_view
<variant_part
>
14836 create_variant_parts (struct obstack
*obstack
,
14837 const offset_map_type
&offset_map
,
14838 struct field_info
*fi
,
14839 const std::vector
<variant_part_builder
> &variant_parts
)
14841 if (variant_parts
.empty ())
14844 size_t n
= variant_parts
.size ();
14845 variant_part
*result
= new (obstack
) variant_part
[n
];
14846 for (size_t i
= 0; i
< n
; ++i
)
14847 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14850 return gdb::array_view
<variant_part
> (result
, n
);
14853 /* Compute the variant part vector for FIP, attaching it to TYPE when
14857 add_variant_property (struct field_info
*fip
, struct type
*type
,
14858 struct dwarf2_cu
*cu
)
14860 /* Map section offsets of fields to their field index. Note the
14861 field index here does not take the number of baseclasses into
14863 offset_map_type offset_map
;
14864 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14865 offset_map
[fip
->fields
[i
].offset
] = i
;
14867 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14868 gdb::array_view
<variant_part
> parts
14869 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14870 fip
->variant_parts
);
14872 struct dynamic_prop prop
;
14873 prop
.kind
= PROP_VARIANT_PARTS
;
14874 prop
.data
.variant_parts
14875 = ((gdb::array_view
<variant_part
> *)
14876 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14878 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14881 /* Create the vector of fields, and attach it to the type. */
14884 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14885 struct dwarf2_cu
*cu
)
14887 int nfields
= fip
->nfields ();
14889 /* Record the field count, allocate space for the array of fields,
14890 and create blank accessibility bitfields if necessary. */
14891 type
->set_num_fields (nfields
);
14893 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
14895 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14897 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14899 TYPE_FIELD_PRIVATE_BITS (type
) =
14900 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14901 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14903 TYPE_FIELD_PROTECTED_BITS (type
) =
14904 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14905 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14907 TYPE_FIELD_IGNORE_BITS (type
) =
14908 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14909 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14912 /* If the type has baseclasses, allocate and clear a bit vector for
14913 TYPE_FIELD_VIRTUAL_BITS. */
14914 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14916 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14917 unsigned char *pointer
;
14919 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14920 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14921 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14922 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14923 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14926 if (!fip
->variant_parts
.empty ())
14927 add_variant_property (fip
, type
, cu
);
14929 /* Copy the saved-up fields into the field vector. */
14930 for (int i
= 0; i
< nfields
; ++i
)
14932 struct nextfield
&field
14933 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14934 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14936 type
->field (i
) = field
.field
;
14937 switch (field
.accessibility
)
14939 case DW_ACCESS_private
:
14940 if (cu
->language
!= language_ada
)
14941 SET_TYPE_FIELD_PRIVATE (type
, i
);
14944 case DW_ACCESS_protected
:
14945 if (cu
->language
!= language_ada
)
14946 SET_TYPE_FIELD_PROTECTED (type
, i
);
14949 case DW_ACCESS_public
:
14953 /* Unknown accessibility. Complain and treat it as public. */
14955 complaint (_("unsupported accessibility %d"),
14956 field
.accessibility
);
14960 if (i
< fip
->baseclasses
.size ())
14962 switch (field
.virtuality
)
14964 case DW_VIRTUALITY_virtual
:
14965 case DW_VIRTUALITY_pure_virtual
:
14966 if (cu
->language
== language_ada
)
14967 error (_("unexpected virtuality in component of Ada type"));
14968 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14975 /* Return true if this member function is a constructor, false
14979 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14981 const char *fieldname
;
14982 const char *type_name
;
14985 if (die
->parent
== NULL
)
14988 if (die
->parent
->tag
!= DW_TAG_structure_type
14989 && die
->parent
->tag
!= DW_TAG_union_type
14990 && die
->parent
->tag
!= DW_TAG_class_type
)
14993 fieldname
= dwarf2_name (die
, cu
);
14994 type_name
= dwarf2_name (die
->parent
, cu
);
14995 if (fieldname
== NULL
|| type_name
== NULL
)
14998 len
= strlen (fieldname
);
14999 return (strncmp (fieldname
, type_name
, len
) == 0
15000 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15003 /* Check if the given VALUE is a recognized enum
15004 dwarf_defaulted_attribute constant according to DWARF5 spec,
15008 is_valid_DW_AT_defaulted (ULONGEST value
)
15012 case DW_DEFAULTED_no
:
15013 case DW_DEFAULTED_in_class
:
15014 case DW_DEFAULTED_out_of_class
:
15018 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
15022 /* Add a member function to the proper fieldlist. */
15025 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15026 struct type
*type
, struct dwarf2_cu
*cu
)
15028 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15029 struct attribute
*attr
;
15031 struct fnfieldlist
*flp
= nullptr;
15032 struct fn_field
*fnp
;
15033 const char *fieldname
;
15034 struct type
*this_type
;
15035 enum dwarf_access_attribute accessibility
;
15037 if (cu
->language
== language_ada
)
15038 error (_("unexpected member function in Ada type"));
15040 /* Get name of member function. */
15041 fieldname
= dwarf2_name (die
, cu
);
15042 if (fieldname
== NULL
)
15045 /* Look up member function name in fieldlist. */
15046 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15048 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15050 flp
= &fip
->fnfieldlists
[i
];
15055 /* Create a new fnfieldlist if necessary. */
15056 if (flp
== nullptr)
15058 fip
->fnfieldlists
.emplace_back ();
15059 flp
= &fip
->fnfieldlists
.back ();
15060 flp
->name
= fieldname
;
15061 i
= fip
->fnfieldlists
.size () - 1;
15064 /* Create a new member function field and add it to the vector of
15066 flp
->fnfields
.emplace_back ();
15067 fnp
= &flp
->fnfields
.back ();
15069 /* Delay processing of the physname until later. */
15070 if (cu
->language
== language_cplus
)
15071 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15075 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15076 fnp
->physname
= physname
? physname
: "";
15079 fnp
->type
= alloc_type (objfile
);
15080 this_type
= read_type_die (die
, cu
);
15081 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
15083 int nparams
= this_type
->num_fields ();
15085 /* TYPE is the domain of this method, and THIS_TYPE is the type
15086 of the method itself (TYPE_CODE_METHOD). */
15087 smash_to_method_type (fnp
->type
, type
,
15088 TYPE_TARGET_TYPE (this_type
),
15089 this_type
->fields (),
15090 this_type
->num_fields (),
15091 TYPE_VARARGS (this_type
));
15093 /* Handle static member functions.
15094 Dwarf2 has no clean way to discern C++ static and non-static
15095 member functions. G++ helps GDB by marking the first
15096 parameter for non-static member functions (which is the this
15097 pointer) as artificial. We obtain this information from
15098 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15099 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15100 fnp
->voffset
= VOFFSET_STATIC
;
15103 complaint (_("member function type missing for '%s'"),
15104 dwarf2_full_name (fieldname
, die
, cu
));
15106 /* Get fcontext from DW_AT_containing_type if present. */
15107 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15108 fnp
->fcontext
= die_containing_type (die
, cu
);
15110 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15111 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15113 /* Get accessibility. */
15114 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15115 if (attr
!= nullptr)
15116 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15118 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15119 switch (accessibility
)
15121 case DW_ACCESS_private
:
15122 fnp
->is_private
= 1;
15124 case DW_ACCESS_protected
:
15125 fnp
->is_protected
= 1;
15129 /* Check for artificial methods. */
15130 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15131 if (attr
&& DW_UNSND (attr
) != 0)
15132 fnp
->is_artificial
= 1;
15134 /* Check for defaulted methods. */
15135 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15136 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15137 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15139 /* Check for deleted methods. */
15140 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15141 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15142 fnp
->is_deleted
= 1;
15144 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15146 /* Get index in virtual function table if it is a virtual member
15147 function. For older versions of GCC, this is an offset in the
15148 appropriate virtual table, as specified by DW_AT_containing_type.
15149 For everyone else, it is an expression to be evaluated relative
15150 to the object address. */
15152 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15153 if (attr
!= nullptr)
15155 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15157 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15159 /* Old-style GCC. */
15160 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15162 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15163 || (DW_BLOCK (attr
)->size
> 1
15164 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15165 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15167 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15168 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15169 dwarf2_complex_location_expr_complaint ();
15171 fnp
->voffset
/= cu
->header
.addr_size
;
15175 dwarf2_complex_location_expr_complaint ();
15177 if (!fnp
->fcontext
)
15179 /* If there is no `this' field and no DW_AT_containing_type,
15180 we cannot actually find a base class context for the
15182 if (this_type
->num_fields () == 0
15183 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15185 complaint (_("cannot determine context for virtual member "
15186 "function \"%s\" (offset %s)"),
15187 fieldname
, sect_offset_str (die
->sect_off
));
15192 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15196 else if (attr
->form_is_section_offset ())
15198 dwarf2_complex_location_expr_complaint ();
15202 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15208 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15209 if (attr
&& DW_UNSND (attr
))
15211 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15212 complaint (_("Member function \"%s\" (offset %s) is virtual "
15213 "but the vtable offset is not specified"),
15214 fieldname
, sect_offset_str (die
->sect_off
));
15215 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15216 TYPE_CPLUS_DYNAMIC (type
) = 1;
15221 /* Create the vector of member function fields, and attach it to the type. */
15224 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15225 struct dwarf2_cu
*cu
)
15227 if (cu
->language
== language_ada
)
15228 error (_("unexpected member functions in Ada type"));
15230 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15231 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15233 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15235 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15237 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15238 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15240 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15241 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15242 fn_flp
->fn_fields
= (struct fn_field
*)
15243 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15245 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15246 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15249 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15252 /* Returns non-zero if NAME is the name of a vtable member in CU's
15253 language, zero otherwise. */
15255 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15257 static const char vptr
[] = "_vptr";
15259 /* Look for the C++ form of the vtable. */
15260 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15266 /* GCC outputs unnamed structures that are really pointers to member
15267 functions, with the ABI-specified layout. If TYPE describes
15268 such a structure, smash it into a member function type.
15270 GCC shouldn't do this; it should just output pointer to member DIEs.
15271 This is GCC PR debug/28767. */
15274 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15276 struct type
*pfn_type
, *self_type
, *new_type
;
15278 /* Check for a structure with no name and two children. */
15279 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15282 /* Check for __pfn and __delta members. */
15283 if (TYPE_FIELD_NAME (type
, 0) == NULL
15284 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15285 || TYPE_FIELD_NAME (type
, 1) == NULL
15286 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15289 /* Find the type of the method. */
15290 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15291 if (pfn_type
== NULL
15292 || pfn_type
->code () != TYPE_CODE_PTR
15293 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15296 /* Look for the "this" argument. */
15297 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15298 if (pfn_type
->num_fields () == 0
15299 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15300 || TYPE_FIELD_TYPE (pfn_type
, 0)->code () != TYPE_CODE_PTR
)
15303 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15304 new_type
= alloc_type (objfile
);
15305 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15306 pfn_type
->fields (), pfn_type
->num_fields (),
15307 TYPE_VARARGS (pfn_type
));
15308 smash_to_methodptr_type (type
, new_type
);
15311 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15312 appropriate error checking and issuing complaints if there is a
15316 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15318 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15320 if (attr
== nullptr)
15323 if (!attr
->form_is_constant ())
15325 complaint (_("DW_AT_alignment must have constant form"
15326 " - DIE at %s [in module %s]"),
15327 sect_offset_str (die
->sect_off
),
15328 objfile_name (cu
->per_objfile
->objfile
));
15333 if (attr
->form
== DW_FORM_sdata
)
15335 LONGEST val
= DW_SND (attr
);
15338 complaint (_("DW_AT_alignment value must not be negative"
15339 " - DIE at %s [in module %s]"),
15340 sect_offset_str (die
->sect_off
),
15341 objfile_name (cu
->per_objfile
->objfile
));
15347 align
= DW_UNSND (attr
);
15351 complaint (_("DW_AT_alignment value must not be zero"
15352 " - DIE at %s [in module %s]"),
15353 sect_offset_str (die
->sect_off
),
15354 objfile_name (cu
->per_objfile
->objfile
));
15357 if ((align
& (align
- 1)) != 0)
15359 complaint (_("DW_AT_alignment value must be a power of 2"
15360 " - DIE at %s [in module %s]"),
15361 sect_offset_str (die
->sect_off
),
15362 objfile_name (cu
->per_objfile
->objfile
));
15369 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15370 the alignment for TYPE. */
15373 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15376 if (!set_type_align (type
, get_alignment (cu
, die
)))
15377 complaint (_("DW_AT_alignment value too large"
15378 " - DIE at %s [in module %s]"),
15379 sect_offset_str (die
->sect_off
),
15380 objfile_name (cu
->per_objfile
->objfile
));
15383 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15384 constant for a type, according to DWARF5 spec, Table 5.5. */
15387 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15392 case DW_CC_pass_by_reference
:
15393 case DW_CC_pass_by_value
:
15397 complaint (_("unrecognized DW_AT_calling_convention value "
15398 "(%s) for a type"), pulongest (value
));
15403 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15404 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15405 also according to GNU-specific values (see include/dwarf2.h). */
15408 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15413 case DW_CC_program
:
15417 case DW_CC_GNU_renesas_sh
:
15418 case DW_CC_GNU_borland_fastcall_i386
:
15419 case DW_CC_GDB_IBM_OpenCL
:
15423 complaint (_("unrecognized DW_AT_calling_convention value "
15424 "(%s) for a subroutine"), pulongest (value
));
15429 /* Called when we find the DIE that starts a structure or union scope
15430 (definition) to create a type for the structure or union. Fill in
15431 the type's name and general properties; the members will not be
15432 processed until process_structure_scope. A symbol table entry for
15433 the type will also not be done until process_structure_scope (assuming
15434 the type has a name).
15436 NOTE: we need to call these functions regardless of whether or not the
15437 DIE has a DW_AT_name attribute, since it might be an anonymous
15438 structure or union. This gets the type entered into our set of
15439 user defined types. */
15441 static struct type
*
15442 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15444 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15446 struct attribute
*attr
;
15449 /* If the definition of this type lives in .debug_types, read that type.
15450 Don't follow DW_AT_specification though, that will take us back up
15451 the chain and we want to go down. */
15452 attr
= die
->attr (DW_AT_signature
);
15453 if (attr
!= nullptr)
15455 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15457 /* The type's CU may not be the same as CU.
15458 Ensure TYPE is recorded with CU in die_type_hash. */
15459 return set_die_type (die
, type
, cu
);
15462 type
= alloc_type (objfile
);
15463 INIT_CPLUS_SPECIFIC (type
);
15465 name
= dwarf2_name (die
, cu
);
15468 if (cu
->language
== language_cplus
15469 || cu
->language
== language_d
15470 || cu
->language
== language_rust
)
15472 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15474 /* dwarf2_full_name might have already finished building the DIE's
15475 type. If so, there is no need to continue. */
15476 if (get_die_type (die
, cu
) != NULL
)
15477 return get_die_type (die
, cu
);
15479 type
->set_name (full_name
);
15483 /* The name is already allocated along with this objfile, so
15484 we don't need to duplicate it for the type. */
15485 type
->set_name (name
);
15489 if (die
->tag
== DW_TAG_structure_type
)
15491 type
->set_code (TYPE_CODE_STRUCT
);
15493 else if (die
->tag
== DW_TAG_union_type
)
15495 type
->set_code (TYPE_CODE_UNION
);
15499 type
->set_code (TYPE_CODE_STRUCT
);
15502 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15503 TYPE_DECLARED_CLASS (type
) = 1;
15505 /* Store the calling convention in the type if it's available in
15506 the die. Otherwise the calling convention remains set to
15507 the default value DW_CC_normal. */
15508 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15509 if (attr
!= nullptr
15510 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15512 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15513 TYPE_CPLUS_CALLING_CONVENTION (type
)
15514 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15517 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15518 if (attr
!= nullptr)
15520 if (attr
->form_is_constant ())
15521 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15524 struct dynamic_prop prop
;
15525 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
15526 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15527 TYPE_LENGTH (type
) = 0;
15532 TYPE_LENGTH (type
) = 0;
15535 maybe_set_alignment (cu
, die
, type
);
15537 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15539 /* ICC<14 does not output the required DW_AT_declaration on
15540 incomplete types, but gives them a size of zero. */
15541 TYPE_STUB (type
) = 1;
15544 TYPE_STUB_SUPPORTED (type
) = 1;
15546 if (die_is_declaration (die
, cu
))
15547 TYPE_STUB (type
) = 1;
15548 else if (attr
== NULL
&& die
->child
== NULL
15549 && producer_is_realview (cu
->producer
))
15550 /* RealView does not output the required DW_AT_declaration
15551 on incomplete types. */
15552 TYPE_STUB (type
) = 1;
15554 /* We need to add the type field to the die immediately so we don't
15555 infinitely recurse when dealing with pointers to the structure
15556 type within the structure itself. */
15557 set_die_type (die
, type
, cu
);
15559 /* set_die_type should be already done. */
15560 set_descriptive_type (type
, die
, cu
);
15565 static void handle_struct_member_die
15566 (struct die_info
*child_die
,
15568 struct field_info
*fi
,
15569 std::vector
<struct symbol
*> *template_args
,
15570 struct dwarf2_cu
*cu
);
15572 /* A helper for handle_struct_member_die that handles
15573 DW_TAG_variant_part. */
15576 handle_variant_part (struct die_info
*die
, struct type
*type
,
15577 struct field_info
*fi
,
15578 std::vector
<struct symbol
*> *template_args
,
15579 struct dwarf2_cu
*cu
)
15581 variant_part_builder
*new_part
;
15582 if (fi
->current_variant_part
== nullptr)
15584 fi
->variant_parts
.emplace_back ();
15585 new_part
= &fi
->variant_parts
.back ();
15587 else if (!fi
->current_variant_part
->processing_variant
)
15589 complaint (_("nested DW_TAG_variant_part seen "
15590 "- DIE at %s [in module %s]"),
15591 sect_offset_str (die
->sect_off
),
15592 objfile_name (cu
->per_objfile
->objfile
));
15597 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15598 current
.variant_parts
.emplace_back ();
15599 new_part
= ¤t
.variant_parts
.back ();
15602 /* When we recurse, we want callees to add to this new variant
15604 scoped_restore save_current_variant_part
15605 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15607 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15610 /* It's a univariant form, an extension we support. */
15612 else if (discr
->form_is_ref ())
15614 struct dwarf2_cu
*target_cu
= cu
;
15615 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15617 new_part
->discriminant_offset
= target_die
->sect_off
;
15621 complaint (_("DW_AT_discr does not have DIE reference form"
15622 " - DIE at %s [in module %s]"),
15623 sect_offset_str (die
->sect_off
),
15624 objfile_name (cu
->per_objfile
->objfile
));
15627 for (die_info
*child_die
= die
->child
;
15629 child_die
= child_die
->sibling
)
15630 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15633 /* A helper for handle_struct_member_die that handles
15637 handle_variant (struct die_info
*die
, struct type
*type
,
15638 struct field_info
*fi
,
15639 std::vector
<struct symbol
*> *template_args
,
15640 struct dwarf2_cu
*cu
)
15642 if (fi
->current_variant_part
== nullptr)
15644 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15645 "- DIE at %s [in module %s]"),
15646 sect_offset_str (die
->sect_off
),
15647 objfile_name (cu
->per_objfile
->objfile
));
15650 if (fi
->current_variant_part
->processing_variant
)
15652 complaint (_("nested DW_TAG_variant seen "
15653 "- DIE at %s [in module %s]"),
15654 sect_offset_str (die
->sect_off
),
15655 objfile_name (cu
->per_objfile
->objfile
));
15659 scoped_restore save_processing_variant
15660 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15663 fi
->current_variant_part
->variants
.emplace_back ();
15664 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15665 variant
.first_field
= fi
->fields
.size ();
15667 /* In a variant we want to get the discriminant and also add a
15668 field for our sole member child. */
15669 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15670 if (discr
== nullptr)
15672 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15673 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15674 variant
.default_branch
= true;
15676 variant
.discr_list_data
= DW_BLOCK (discr
);
15679 variant
.discriminant_value
= DW_UNSND (discr
);
15681 for (die_info
*variant_child
= die
->child
;
15682 variant_child
!= NULL
;
15683 variant_child
= variant_child
->sibling
)
15684 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15686 variant
.last_field
= fi
->fields
.size ();
15689 /* A helper for process_structure_scope that handles a single member
15693 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15694 struct field_info
*fi
,
15695 std::vector
<struct symbol
*> *template_args
,
15696 struct dwarf2_cu
*cu
)
15698 if (child_die
->tag
== DW_TAG_member
15699 || child_die
->tag
== DW_TAG_variable
)
15701 /* NOTE: carlton/2002-11-05: A C++ static data member
15702 should be a DW_TAG_member that is a declaration, but
15703 all versions of G++ as of this writing (so through at
15704 least 3.2.1) incorrectly generate DW_TAG_variable
15705 tags for them instead. */
15706 dwarf2_add_field (fi
, child_die
, cu
);
15708 else if (child_die
->tag
== DW_TAG_subprogram
)
15710 /* Rust doesn't have member functions in the C++ sense.
15711 However, it does emit ordinary functions as children
15712 of a struct DIE. */
15713 if (cu
->language
== language_rust
)
15714 read_func_scope (child_die
, cu
);
15717 /* C++ member function. */
15718 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15721 else if (child_die
->tag
== DW_TAG_inheritance
)
15723 /* C++ base class field. */
15724 dwarf2_add_field (fi
, child_die
, cu
);
15726 else if (type_can_define_types (child_die
))
15727 dwarf2_add_type_defn (fi
, child_die
, cu
);
15728 else if (child_die
->tag
== DW_TAG_template_type_param
15729 || child_die
->tag
== DW_TAG_template_value_param
)
15731 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15734 template_args
->push_back (arg
);
15736 else if (child_die
->tag
== DW_TAG_variant_part
)
15737 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15738 else if (child_die
->tag
== DW_TAG_variant
)
15739 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15742 /* Finish creating a structure or union type, including filling in
15743 its members and creating a symbol for it. */
15746 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15748 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15749 struct die_info
*child_die
;
15752 type
= get_die_type (die
, cu
);
15754 type
= read_structure_type (die
, cu
);
15756 bool has_template_parameters
= false;
15757 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15759 struct field_info fi
;
15760 std::vector
<struct symbol
*> template_args
;
15762 child_die
= die
->child
;
15764 while (child_die
&& child_die
->tag
)
15766 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15767 child_die
= child_die
->sibling
;
15770 /* Attach template arguments to type. */
15771 if (!template_args
.empty ())
15773 has_template_parameters
= true;
15774 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15775 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15776 TYPE_TEMPLATE_ARGUMENTS (type
)
15777 = XOBNEWVEC (&objfile
->objfile_obstack
,
15779 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15780 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15781 template_args
.data (),
15782 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15783 * sizeof (struct symbol
*)));
15786 /* Attach fields and member functions to the type. */
15787 if (fi
.nfields () > 0)
15788 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15789 if (!fi
.fnfieldlists
.empty ())
15791 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15793 /* Get the type which refers to the base class (possibly this
15794 class itself) which contains the vtable pointer for the current
15795 class from the DW_AT_containing_type attribute. This use of
15796 DW_AT_containing_type is a GNU extension. */
15798 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15800 struct type
*t
= die_containing_type (die
, cu
);
15802 set_type_vptr_basetype (type
, t
);
15807 /* Our own class provides vtbl ptr. */
15808 for (i
= t
->num_fields () - 1;
15809 i
>= TYPE_N_BASECLASSES (t
);
15812 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15814 if (is_vtable_name (fieldname
, cu
))
15816 set_type_vptr_fieldno (type
, i
);
15821 /* Complain if virtual function table field not found. */
15822 if (i
< TYPE_N_BASECLASSES (t
))
15823 complaint (_("virtual function table pointer "
15824 "not found when defining class '%s'"),
15825 type
->name () ? type
->name () : "");
15829 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15832 else if (cu
->producer
15833 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15835 /* The IBM XLC compiler does not provide direct indication
15836 of the containing type, but the vtable pointer is
15837 always named __vfp. */
15841 for (i
= type
->num_fields () - 1;
15842 i
>= TYPE_N_BASECLASSES (type
);
15845 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15847 set_type_vptr_fieldno (type
, i
);
15848 set_type_vptr_basetype (type
, type
);
15855 /* Copy fi.typedef_field_list linked list elements content into the
15856 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15857 if (!fi
.typedef_field_list
.empty ())
15859 int count
= fi
.typedef_field_list
.size ();
15861 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15862 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15863 = ((struct decl_field
*)
15865 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15866 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15868 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15869 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15872 /* Copy fi.nested_types_list linked list elements content into the
15873 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15874 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15876 int count
= fi
.nested_types_list
.size ();
15878 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15879 TYPE_NESTED_TYPES_ARRAY (type
)
15880 = ((struct decl_field
*)
15881 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15882 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15884 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15885 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15889 quirk_gcc_member_function_pointer (type
, objfile
);
15890 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15891 cu
->rust_unions
.push_back (type
);
15893 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15894 snapshots) has been known to create a die giving a declaration
15895 for a class that has, as a child, a die giving a definition for a
15896 nested class. So we have to process our children even if the
15897 current die is a declaration. Normally, of course, a declaration
15898 won't have any children at all. */
15900 child_die
= die
->child
;
15902 while (child_die
!= NULL
&& child_die
->tag
)
15904 if (child_die
->tag
== DW_TAG_member
15905 || child_die
->tag
== DW_TAG_variable
15906 || child_die
->tag
== DW_TAG_inheritance
15907 || child_die
->tag
== DW_TAG_template_value_param
15908 || child_die
->tag
== DW_TAG_template_type_param
)
15913 process_die (child_die
, cu
);
15915 child_die
= child_die
->sibling
;
15918 /* Do not consider external references. According to the DWARF standard,
15919 these DIEs are identified by the fact that they have no byte_size
15920 attribute, and a declaration attribute. */
15921 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15922 || !die_is_declaration (die
, cu
)
15923 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15925 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15927 if (has_template_parameters
)
15929 struct symtab
*symtab
;
15930 if (sym
!= nullptr)
15931 symtab
= symbol_symtab (sym
);
15932 else if (cu
->line_header
!= nullptr)
15934 /* Any related symtab will do. */
15936 = cu
->line_header
->file_names ()[0].symtab
;
15941 complaint (_("could not find suitable "
15942 "symtab for template parameter"
15943 " - DIE at %s [in module %s]"),
15944 sect_offset_str (die
->sect_off
),
15945 objfile_name (objfile
));
15948 if (symtab
!= nullptr)
15950 /* Make sure that the symtab is set on the new symbols.
15951 Even though they don't appear in this symtab directly,
15952 other parts of gdb assume that symbols do, and this is
15953 reasonably true. */
15954 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15955 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15961 /* Assuming DIE is an enumeration type, and TYPE is its associated
15962 type, update TYPE using some information only available in DIE's
15963 children. In particular, the fields are computed. */
15966 update_enumeration_type_from_children (struct die_info
*die
,
15968 struct dwarf2_cu
*cu
)
15970 struct die_info
*child_die
;
15971 int unsigned_enum
= 1;
15974 auto_obstack obstack
;
15975 std::vector
<struct field
> fields
;
15977 for (child_die
= die
->child
;
15978 child_die
!= NULL
&& child_die
->tag
;
15979 child_die
= child_die
->sibling
)
15981 struct attribute
*attr
;
15983 const gdb_byte
*bytes
;
15984 struct dwarf2_locexpr_baton
*baton
;
15987 if (child_die
->tag
!= DW_TAG_enumerator
)
15990 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15994 name
= dwarf2_name (child_die
, cu
);
15996 name
= "<anonymous enumerator>";
15998 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15999 &value
, &bytes
, &baton
);
16007 if (count_one_bits_ll (value
) >= 2)
16011 fields
.emplace_back ();
16012 struct field
&field
= fields
.back ();
16013 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
16014 SET_FIELD_ENUMVAL (field
, value
);
16017 if (!fields
.empty ())
16019 type
->set_num_fields (fields
.size ());
16022 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
16023 memcpy (type
->fields (), fields
.data (),
16024 sizeof (struct field
) * fields
.size ());
16028 TYPE_UNSIGNED (type
) = 1;
16030 TYPE_FLAG_ENUM (type
) = 1;
16033 /* Given a DW_AT_enumeration_type die, set its type. We do not
16034 complete the type's fields yet, or create any symbols. */
16036 static struct type
*
16037 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16039 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16041 struct attribute
*attr
;
16044 /* If the definition of this type lives in .debug_types, read that type.
16045 Don't follow DW_AT_specification though, that will take us back up
16046 the chain and we want to go down. */
16047 attr
= die
->attr (DW_AT_signature
);
16048 if (attr
!= nullptr)
16050 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16052 /* The type's CU may not be the same as CU.
16053 Ensure TYPE is recorded with CU in die_type_hash. */
16054 return set_die_type (die
, type
, cu
);
16057 type
= alloc_type (objfile
);
16059 type
->set_code (TYPE_CODE_ENUM
);
16060 name
= dwarf2_full_name (NULL
, die
, cu
);
16062 type
->set_name (name
);
16064 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16067 struct type
*underlying_type
= die_type (die
, cu
);
16069 TYPE_TARGET_TYPE (type
) = underlying_type
;
16072 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16073 if (attr
!= nullptr)
16075 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16079 TYPE_LENGTH (type
) = 0;
16082 maybe_set_alignment (cu
, die
, type
);
16084 /* The enumeration DIE can be incomplete. In Ada, any type can be
16085 declared as private in the package spec, and then defined only
16086 inside the package body. Such types are known as Taft Amendment
16087 Types. When another package uses such a type, an incomplete DIE
16088 may be generated by the compiler. */
16089 if (die_is_declaration (die
, cu
))
16090 TYPE_STUB (type
) = 1;
16092 /* If this type has an underlying type that is not a stub, then we
16093 may use its attributes. We always use the "unsigned" attribute
16094 in this situation, because ordinarily we guess whether the type
16095 is unsigned -- but the guess can be wrong and the underlying type
16096 can tell us the reality. However, we defer to a local size
16097 attribute if one exists, because this lets the compiler override
16098 the underlying type if needed. */
16099 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16101 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16102 underlying_type
= check_typedef (underlying_type
);
16103 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
16104 if (TYPE_LENGTH (type
) == 0)
16105 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16106 if (TYPE_RAW_ALIGN (type
) == 0
16107 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16108 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16111 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16113 set_die_type (die
, type
, cu
);
16115 /* Finish the creation of this type by using the enum's children.
16116 Note that, as usual, this must come after set_die_type to avoid
16117 infinite recursion when trying to compute the names of the
16119 update_enumeration_type_from_children (die
, type
, cu
);
16124 /* Given a pointer to a die which begins an enumeration, process all
16125 the dies that define the members of the enumeration, and create the
16126 symbol for the enumeration type.
16128 NOTE: We reverse the order of the element list. */
16131 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16133 struct type
*this_type
;
16135 this_type
= get_die_type (die
, cu
);
16136 if (this_type
== NULL
)
16137 this_type
= read_enumeration_type (die
, cu
);
16139 if (die
->child
!= NULL
)
16141 struct die_info
*child_die
;
16144 child_die
= die
->child
;
16145 while (child_die
&& child_die
->tag
)
16147 if (child_die
->tag
!= DW_TAG_enumerator
)
16149 process_die (child_die
, cu
);
16153 name
= dwarf2_name (child_die
, cu
);
16155 new_symbol (child_die
, this_type
, cu
);
16158 child_die
= child_die
->sibling
;
16162 /* If we are reading an enum from a .debug_types unit, and the enum
16163 is a declaration, and the enum is not the signatured type in the
16164 unit, then we do not want to add a symbol for it. Adding a
16165 symbol would in some cases obscure the true definition of the
16166 enum, giving users an incomplete type when the definition is
16167 actually available. Note that we do not want to do this for all
16168 enums which are just declarations, because C++0x allows forward
16169 enum declarations. */
16170 if (cu
->per_cu
->is_debug_types
16171 && die_is_declaration (die
, cu
))
16173 struct signatured_type
*sig_type
;
16175 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16176 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16177 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16181 new_symbol (die
, this_type
, cu
);
16184 /* Extract all information from a DW_TAG_array_type DIE and put it in
16185 the DIE's type field. For now, this only handles one dimensional
16188 static struct type
*
16189 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16191 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16192 struct die_info
*child_die
;
16194 struct type
*element_type
, *range_type
, *index_type
;
16195 struct attribute
*attr
;
16197 struct dynamic_prop
*byte_stride_prop
= NULL
;
16198 unsigned int bit_stride
= 0;
16200 element_type
= die_type (die
, cu
);
16202 /* The die_type call above may have already set the type for this DIE. */
16203 type
= get_die_type (die
, cu
);
16207 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16211 struct type
*prop_type
= cu
->addr_sized_int_type (false);
16214 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16215 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16219 complaint (_("unable to read array DW_AT_byte_stride "
16220 " - DIE at %s [in module %s]"),
16221 sect_offset_str (die
->sect_off
),
16222 objfile_name (cu
->per_objfile
->objfile
));
16223 /* Ignore this attribute. We will likely not be able to print
16224 arrays of this type correctly, but there is little we can do
16225 to help if we cannot read the attribute's value. */
16226 byte_stride_prop
= NULL
;
16230 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16232 bit_stride
= DW_UNSND (attr
);
16234 /* Irix 6.2 native cc creates array types without children for
16235 arrays with unspecified length. */
16236 if (die
->child
== NULL
)
16238 index_type
= objfile_type (objfile
)->builtin_int
;
16239 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16240 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16241 byte_stride_prop
, bit_stride
);
16242 return set_die_type (die
, type
, cu
);
16245 std::vector
<struct type
*> range_types
;
16246 child_die
= die
->child
;
16247 while (child_die
&& child_die
->tag
)
16249 if (child_die
->tag
== DW_TAG_subrange_type
)
16251 struct type
*child_type
= read_type_die (child_die
, cu
);
16253 if (child_type
!= NULL
)
16255 /* The range type was succesfully read. Save it for the
16256 array type creation. */
16257 range_types
.push_back (child_type
);
16260 child_die
= child_die
->sibling
;
16263 /* Dwarf2 dimensions are output from left to right, create the
16264 necessary array types in backwards order. */
16266 type
= element_type
;
16268 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16272 while (i
< range_types
.size ())
16273 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16274 byte_stride_prop
, bit_stride
);
16278 size_t ndim
= range_types
.size ();
16280 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16281 byte_stride_prop
, bit_stride
);
16284 /* Understand Dwarf2 support for vector types (like they occur on
16285 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16286 array type. This is not part of the Dwarf2/3 standard yet, but a
16287 custom vendor extension. The main difference between a regular
16288 array and the vector variant is that vectors are passed by value
16290 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16291 if (attr
!= nullptr)
16292 make_vector_type (type
);
16294 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16295 implementation may choose to implement triple vectors using this
16297 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16298 if (attr
!= nullptr)
16300 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16301 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16303 complaint (_("DW_AT_byte_size for array type smaller "
16304 "than the total size of elements"));
16307 name
= dwarf2_name (die
, cu
);
16309 type
->set_name (name
);
16311 maybe_set_alignment (cu
, die
, type
);
16313 /* Install the type in the die. */
16314 set_die_type (die
, type
, cu
);
16316 /* set_die_type should be already done. */
16317 set_descriptive_type (type
, die
, cu
);
16322 static enum dwarf_array_dim_ordering
16323 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16325 struct attribute
*attr
;
16327 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16329 if (attr
!= nullptr)
16330 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16332 /* GNU F77 is a special case, as at 08/2004 array type info is the
16333 opposite order to the dwarf2 specification, but data is still
16334 laid out as per normal fortran.
16336 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16337 version checking. */
16339 if (cu
->language
== language_fortran
16340 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16342 return DW_ORD_row_major
;
16345 switch (cu
->language_defn
->la_array_ordering
)
16347 case array_column_major
:
16348 return DW_ORD_col_major
;
16349 case array_row_major
:
16351 return DW_ORD_row_major
;
16355 /* Extract all information from a DW_TAG_set_type DIE and put it in
16356 the DIE's type field. */
16358 static struct type
*
16359 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16361 struct type
*domain_type
, *set_type
;
16362 struct attribute
*attr
;
16364 domain_type
= die_type (die
, cu
);
16366 /* The die_type call above may have already set the type for this DIE. */
16367 set_type
= get_die_type (die
, cu
);
16371 set_type
= create_set_type (NULL
, domain_type
);
16373 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16374 if (attr
!= nullptr)
16375 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16377 maybe_set_alignment (cu
, die
, set_type
);
16379 return set_die_type (die
, set_type
, cu
);
16382 /* A helper for read_common_block that creates a locexpr baton.
16383 SYM is the symbol which we are marking as computed.
16384 COMMON_DIE is the DIE for the common block.
16385 COMMON_LOC is the location expression attribute for the common
16387 MEMBER_LOC is the location expression attribute for the particular
16388 member of the common block that we are processing.
16389 CU is the CU from which the above come. */
16392 mark_common_block_symbol_computed (struct symbol
*sym
,
16393 struct die_info
*common_die
,
16394 struct attribute
*common_loc
,
16395 struct attribute
*member_loc
,
16396 struct dwarf2_cu
*cu
)
16398 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
16399 struct objfile
*objfile
= per_objfile
->objfile
;
16400 struct dwarf2_locexpr_baton
*baton
;
16402 unsigned int cu_off
;
16403 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16404 LONGEST offset
= 0;
16406 gdb_assert (common_loc
&& member_loc
);
16407 gdb_assert (common_loc
->form_is_block ());
16408 gdb_assert (member_loc
->form_is_block ()
16409 || member_loc
->form_is_constant ());
16411 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16412 baton
->per_objfile
= per_objfile
;
16413 baton
->per_cu
= cu
->per_cu
;
16414 gdb_assert (baton
->per_cu
);
16416 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16418 if (member_loc
->form_is_constant ())
16420 offset
= member_loc
->constant_value (0);
16421 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16424 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16426 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16429 *ptr
++ = DW_OP_call4
;
16430 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16431 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16434 if (member_loc
->form_is_constant ())
16436 *ptr
++ = DW_OP_addr
;
16437 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16438 ptr
+= cu
->header
.addr_size
;
16442 /* We have to copy the data here, because DW_OP_call4 will only
16443 use a DW_AT_location attribute. */
16444 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16445 ptr
+= DW_BLOCK (member_loc
)->size
;
16448 *ptr
++ = DW_OP_plus
;
16449 gdb_assert (ptr
- baton
->data
== baton
->size
);
16451 SYMBOL_LOCATION_BATON (sym
) = baton
;
16452 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16455 /* Create appropriate locally-scoped variables for all the
16456 DW_TAG_common_block entries. Also create a struct common_block
16457 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16458 is used to separate the common blocks name namespace from regular
16462 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16464 struct attribute
*attr
;
16466 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16467 if (attr
!= nullptr)
16469 /* Support the .debug_loc offsets. */
16470 if (attr
->form_is_block ())
16474 else if (attr
->form_is_section_offset ())
16476 dwarf2_complex_location_expr_complaint ();
16481 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16482 "common block member");
16487 if (die
->child
!= NULL
)
16489 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16490 struct die_info
*child_die
;
16491 size_t n_entries
= 0, size
;
16492 struct common_block
*common_block
;
16493 struct symbol
*sym
;
16495 for (child_die
= die
->child
;
16496 child_die
&& child_die
->tag
;
16497 child_die
= child_die
->sibling
)
16500 size
= (sizeof (struct common_block
)
16501 + (n_entries
- 1) * sizeof (struct symbol
*));
16503 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16505 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16506 common_block
->n_entries
= 0;
16508 for (child_die
= die
->child
;
16509 child_die
&& child_die
->tag
;
16510 child_die
= child_die
->sibling
)
16512 /* Create the symbol in the DW_TAG_common_block block in the current
16514 sym
= new_symbol (child_die
, NULL
, cu
);
16517 struct attribute
*member_loc
;
16519 common_block
->contents
[common_block
->n_entries
++] = sym
;
16521 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16525 /* GDB has handled this for a long time, but it is
16526 not specified by DWARF. It seems to have been
16527 emitted by gfortran at least as recently as:
16528 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16529 complaint (_("Variable in common block has "
16530 "DW_AT_data_member_location "
16531 "- DIE at %s [in module %s]"),
16532 sect_offset_str (child_die
->sect_off
),
16533 objfile_name (objfile
));
16535 if (member_loc
->form_is_section_offset ())
16536 dwarf2_complex_location_expr_complaint ();
16537 else if (member_loc
->form_is_constant ()
16538 || member_loc
->form_is_block ())
16540 if (attr
!= nullptr)
16541 mark_common_block_symbol_computed (sym
, die
, attr
,
16545 dwarf2_complex_location_expr_complaint ();
16550 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16551 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16555 /* Create a type for a C++ namespace. */
16557 static struct type
*
16558 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16560 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16561 const char *previous_prefix
, *name
;
16565 /* For extensions, reuse the type of the original namespace. */
16566 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16568 struct die_info
*ext_die
;
16569 struct dwarf2_cu
*ext_cu
= cu
;
16571 ext_die
= dwarf2_extension (die
, &ext_cu
);
16572 type
= read_type_die (ext_die
, ext_cu
);
16574 /* EXT_CU may not be the same as CU.
16575 Ensure TYPE is recorded with CU in die_type_hash. */
16576 return set_die_type (die
, type
, cu
);
16579 name
= namespace_name (die
, &is_anonymous
, cu
);
16581 /* Now build the name of the current namespace. */
16583 previous_prefix
= determine_prefix (die
, cu
);
16584 if (previous_prefix
[0] != '\0')
16585 name
= typename_concat (&objfile
->objfile_obstack
,
16586 previous_prefix
, name
, 0, cu
);
16588 /* Create the type. */
16589 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16591 return set_die_type (die
, type
, cu
);
16594 /* Read a namespace scope. */
16597 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16599 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16602 /* Add a symbol associated to this if we haven't seen the namespace
16603 before. Also, add a using directive if it's an anonymous
16606 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16610 type
= read_type_die (die
, cu
);
16611 new_symbol (die
, type
, cu
);
16613 namespace_name (die
, &is_anonymous
, cu
);
16616 const char *previous_prefix
= determine_prefix (die
, cu
);
16618 std::vector
<const char *> excludes
;
16619 add_using_directive (using_directives (cu
),
16620 previous_prefix
, type
->name (), NULL
,
16621 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16625 if (die
->child
!= NULL
)
16627 struct die_info
*child_die
= die
->child
;
16629 while (child_die
&& child_die
->tag
)
16631 process_die (child_die
, cu
);
16632 child_die
= child_die
->sibling
;
16637 /* Read a Fortran module as type. This DIE can be only a declaration used for
16638 imported module. Still we need that type as local Fortran "use ... only"
16639 declaration imports depend on the created type in determine_prefix. */
16641 static struct type
*
16642 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16644 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16645 const char *module_name
;
16648 module_name
= dwarf2_name (die
, cu
);
16649 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16651 return set_die_type (die
, type
, cu
);
16654 /* Read a Fortran module. */
16657 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16659 struct die_info
*child_die
= die
->child
;
16662 type
= read_type_die (die
, cu
);
16663 new_symbol (die
, type
, cu
);
16665 while (child_die
&& child_die
->tag
)
16667 process_die (child_die
, cu
);
16668 child_die
= child_die
->sibling
;
16672 /* Return the name of the namespace represented by DIE. Set
16673 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16676 static const char *
16677 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16679 struct die_info
*current_die
;
16680 const char *name
= NULL
;
16682 /* Loop through the extensions until we find a name. */
16684 for (current_die
= die
;
16685 current_die
!= NULL
;
16686 current_die
= dwarf2_extension (die
, &cu
))
16688 /* We don't use dwarf2_name here so that we can detect the absence
16689 of a name -> anonymous namespace. */
16690 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16696 /* Is it an anonymous namespace? */
16698 *is_anonymous
= (name
== NULL
);
16700 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16705 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16706 the user defined type vector. */
16708 static struct type
*
16709 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16711 struct gdbarch
*gdbarch
= cu
->per_objfile
->objfile
->arch ();
16712 struct comp_unit_head
*cu_header
= &cu
->header
;
16714 struct attribute
*attr_byte_size
;
16715 struct attribute
*attr_address_class
;
16716 int byte_size
, addr_class
;
16717 struct type
*target_type
;
16719 target_type
= die_type (die
, cu
);
16721 /* The die_type call above may have already set the type for this DIE. */
16722 type
= get_die_type (die
, cu
);
16726 type
= lookup_pointer_type (target_type
);
16728 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16729 if (attr_byte_size
)
16730 byte_size
= DW_UNSND (attr_byte_size
);
16732 byte_size
= cu_header
->addr_size
;
16734 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16735 if (attr_address_class
)
16736 addr_class
= DW_UNSND (attr_address_class
);
16738 addr_class
= DW_ADDR_none
;
16740 ULONGEST alignment
= get_alignment (cu
, die
);
16742 /* If the pointer size, alignment, or address class is different
16743 than the default, create a type variant marked as such and set
16744 the length accordingly. */
16745 if (TYPE_LENGTH (type
) != byte_size
16746 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16747 && alignment
!= TYPE_RAW_ALIGN (type
))
16748 || addr_class
!= DW_ADDR_none
)
16750 if (gdbarch_address_class_type_flags_p (gdbarch
))
16754 type_flags
= gdbarch_address_class_type_flags
16755 (gdbarch
, byte_size
, addr_class
);
16756 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16758 type
= make_type_with_address_space (type
, type_flags
);
16760 else if (TYPE_LENGTH (type
) != byte_size
)
16762 complaint (_("invalid pointer size %d"), byte_size
);
16764 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16766 complaint (_("Invalid DW_AT_alignment"
16767 " - DIE at %s [in module %s]"),
16768 sect_offset_str (die
->sect_off
),
16769 objfile_name (cu
->per_objfile
->objfile
));
16773 /* Should we also complain about unhandled address classes? */
16777 TYPE_LENGTH (type
) = byte_size
;
16778 set_type_align (type
, alignment
);
16779 return set_die_type (die
, type
, cu
);
16782 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16783 the user defined type vector. */
16785 static struct type
*
16786 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16789 struct type
*to_type
;
16790 struct type
*domain
;
16792 to_type
= die_type (die
, cu
);
16793 domain
= die_containing_type (die
, cu
);
16795 /* The calls above may have already set the type for this DIE. */
16796 type
= get_die_type (die
, cu
);
16800 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
16801 type
= lookup_methodptr_type (to_type
);
16802 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
16804 struct type
*new_type
= alloc_type (cu
->per_objfile
->objfile
);
16806 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16807 to_type
->fields (), to_type
->num_fields (),
16808 TYPE_VARARGS (to_type
));
16809 type
= lookup_methodptr_type (new_type
);
16812 type
= lookup_memberptr_type (to_type
, domain
);
16814 return set_die_type (die
, type
, cu
);
16817 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16818 the user defined type vector. */
16820 static struct type
*
16821 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16822 enum type_code refcode
)
16824 struct comp_unit_head
*cu_header
= &cu
->header
;
16825 struct type
*type
, *target_type
;
16826 struct attribute
*attr
;
16828 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16830 target_type
= die_type (die
, cu
);
16832 /* The die_type call above may have already set the type for this DIE. */
16833 type
= get_die_type (die
, cu
);
16837 type
= lookup_reference_type (target_type
, refcode
);
16838 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16839 if (attr
!= nullptr)
16841 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16845 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16847 maybe_set_alignment (cu
, die
, type
);
16848 return set_die_type (die
, type
, cu
);
16851 /* Add the given cv-qualifiers to the element type of the array. GCC
16852 outputs DWARF type qualifiers that apply to an array, not the
16853 element type. But GDB relies on the array element type to carry
16854 the cv-qualifiers. This mimics section 6.7.3 of the C99
16857 static struct type
*
16858 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16859 struct type
*base_type
, int cnst
, int voltl
)
16861 struct type
*el_type
, *inner_array
;
16863 base_type
= copy_type (base_type
);
16864 inner_array
= base_type
;
16866 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
16868 TYPE_TARGET_TYPE (inner_array
) =
16869 copy_type (TYPE_TARGET_TYPE (inner_array
));
16870 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16873 el_type
= TYPE_TARGET_TYPE (inner_array
);
16874 cnst
|= TYPE_CONST (el_type
);
16875 voltl
|= TYPE_VOLATILE (el_type
);
16876 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16878 return set_die_type (die
, base_type
, cu
);
16881 static struct type
*
16882 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16884 struct type
*base_type
, *cv_type
;
16886 base_type
= die_type (die
, cu
);
16888 /* The die_type call above may have already set the type for this DIE. */
16889 cv_type
= get_die_type (die
, cu
);
16893 /* In case the const qualifier is applied to an array type, the element type
16894 is so qualified, not the array type (section 6.7.3 of C99). */
16895 if (base_type
->code () == TYPE_CODE_ARRAY
)
16896 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16898 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16899 return set_die_type (die
, cv_type
, cu
);
16902 static struct type
*
16903 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16905 struct type
*base_type
, *cv_type
;
16907 base_type
= die_type (die
, cu
);
16909 /* The die_type call above may have already set the type for this DIE. */
16910 cv_type
= get_die_type (die
, cu
);
16914 /* In case the volatile qualifier is applied to an array type, the
16915 element type is so qualified, not the array type (section 6.7.3
16917 if (base_type
->code () == TYPE_CODE_ARRAY
)
16918 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16920 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16921 return set_die_type (die
, cv_type
, cu
);
16924 /* Handle DW_TAG_restrict_type. */
16926 static struct type
*
16927 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16929 struct type
*base_type
, *cv_type
;
16931 base_type
= die_type (die
, cu
);
16933 /* The die_type call above may have already set the type for this DIE. */
16934 cv_type
= get_die_type (die
, cu
);
16938 cv_type
= make_restrict_type (base_type
);
16939 return set_die_type (die
, cv_type
, cu
);
16942 /* Handle DW_TAG_atomic_type. */
16944 static struct type
*
16945 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16947 struct type
*base_type
, *cv_type
;
16949 base_type
= die_type (die
, cu
);
16951 /* The die_type call above may have already set the type for this DIE. */
16952 cv_type
= get_die_type (die
, cu
);
16956 cv_type
= make_atomic_type (base_type
);
16957 return set_die_type (die
, cv_type
, cu
);
16960 /* Extract all information from a DW_TAG_string_type DIE and add to
16961 the user defined type vector. It isn't really a user defined type,
16962 but it behaves like one, with other DIE's using an AT_user_def_type
16963 attribute to reference it. */
16965 static struct type
*
16966 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16968 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16969 struct gdbarch
*gdbarch
= objfile
->arch ();
16970 struct type
*type
, *range_type
, *index_type
, *char_type
;
16971 struct attribute
*attr
;
16972 struct dynamic_prop prop
;
16973 bool length_is_constant
= true;
16976 /* There are a couple of places where bit sizes might be made use of
16977 when parsing a DW_TAG_string_type, however, no producer that we know
16978 of make use of these. Handling bit sizes that are a multiple of the
16979 byte size is easy enough, but what about other bit sizes? Lets deal
16980 with that problem when we have to. Warn about these attributes being
16981 unsupported, then parse the type and ignore them like we always
16983 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16984 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16986 static bool warning_printed
= false;
16987 if (!warning_printed
)
16989 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16990 "currently supported on DW_TAG_string_type."));
16991 warning_printed
= true;
16995 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16996 if (attr
!= nullptr && !attr
->form_is_constant ())
16998 /* The string length describes the location at which the length of
16999 the string can be found. The size of the length field can be
17000 specified with one of the attributes below. */
17001 struct type
*prop_type
;
17002 struct attribute
*len
17003 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
17004 if (len
== nullptr)
17005 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17006 if (len
!= nullptr && len
->form_is_constant ())
17008 /* Pass 0 as the default as we know this attribute is constant
17009 and the default value will not be returned. */
17010 LONGEST sz
= len
->constant_value (0);
17011 prop_type
= cu
->per_objfile
->int_type (sz
, true);
17015 /* If the size is not specified then we assume it is the size of
17016 an address on this target. */
17017 prop_type
= cu
->addr_sized_int_type (true);
17020 /* Convert the attribute into a dynamic property. */
17021 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
17024 length_is_constant
= false;
17026 else if (attr
!= nullptr)
17028 /* This DW_AT_string_length just contains the length with no
17029 indirection. There's no need to create a dynamic property in this
17030 case. Pass 0 for the default value as we know it will not be
17031 returned in this case. */
17032 length
= attr
->constant_value (0);
17034 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17036 /* We don't currently support non-constant byte sizes for strings. */
17037 length
= attr
->constant_value (1);
17041 /* Use 1 as a fallback length if we have nothing else. */
17045 index_type
= objfile_type (objfile
)->builtin_int
;
17046 if (length_is_constant
)
17047 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17050 struct dynamic_prop low_bound
;
17052 low_bound
.kind
= PROP_CONST
;
17053 low_bound
.data
.const_val
= 1;
17054 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
17056 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17057 type
= create_string_type (NULL
, char_type
, range_type
);
17059 return set_die_type (die
, type
, cu
);
17062 /* Assuming that DIE corresponds to a function, returns nonzero
17063 if the function is prototyped. */
17066 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17068 struct attribute
*attr
;
17070 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17071 if (attr
&& (DW_UNSND (attr
) != 0))
17074 /* The DWARF standard implies that the DW_AT_prototyped attribute
17075 is only meaningful for C, but the concept also extends to other
17076 languages that allow unprototyped functions (Eg: Objective C).
17077 For all other languages, assume that functions are always
17079 if (cu
->language
!= language_c
17080 && cu
->language
!= language_objc
17081 && cu
->language
!= language_opencl
)
17084 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17085 prototyped and unprototyped functions; default to prototyped,
17086 since that is more common in modern code (and RealView warns
17087 about unprototyped functions). */
17088 if (producer_is_realview (cu
->producer
))
17094 /* Handle DIES due to C code like:
17098 int (*funcp)(int a, long l);
17102 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17104 static struct type
*
17105 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17107 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17108 struct type
*type
; /* Type that this function returns. */
17109 struct type
*ftype
; /* Function that returns above type. */
17110 struct attribute
*attr
;
17112 type
= die_type (die
, cu
);
17114 /* The die_type call above may have already set the type for this DIE. */
17115 ftype
= get_die_type (die
, cu
);
17119 ftype
= lookup_function_type (type
);
17121 if (prototyped_function_p (die
, cu
))
17122 TYPE_PROTOTYPED (ftype
) = 1;
17124 /* Store the calling convention in the type if it's available in
17125 the subroutine die. Otherwise set the calling convention to
17126 the default value DW_CC_normal. */
17127 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17128 if (attr
!= nullptr
17129 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17130 TYPE_CALLING_CONVENTION (ftype
)
17131 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17132 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17133 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17135 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17137 /* Record whether the function returns normally to its caller or not
17138 if the DWARF producer set that information. */
17139 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17140 if (attr
&& (DW_UNSND (attr
) != 0))
17141 TYPE_NO_RETURN (ftype
) = 1;
17143 /* We need to add the subroutine type to the die immediately so
17144 we don't infinitely recurse when dealing with parameters
17145 declared as the same subroutine type. */
17146 set_die_type (die
, ftype
, cu
);
17148 if (die
->child
!= NULL
)
17150 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17151 struct die_info
*child_die
;
17152 int nparams
, iparams
;
17154 /* Count the number of parameters.
17155 FIXME: GDB currently ignores vararg functions, but knows about
17156 vararg member functions. */
17158 child_die
= die
->child
;
17159 while (child_die
&& child_die
->tag
)
17161 if (child_die
->tag
== DW_TAG_formal_parameter
)
17163 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17164 TYPE_VARARGS (ftype
) = 1;
17165 child_die
= child_die
->sibling
;
17168 /* Allocate storage for parameters and fill them in. */
17169 ftype
->set_num_fields (nparams
);
17171 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
17173 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17174 even if we error out during the parameters reading below. */
17175 for (iparams
= 0; iparams
< nparams
; iparams
++)
17176 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17179 child_die
= die
->child
;
17180 while (child_die
&& child_die
->tag
)
17182 if (child_die
->tag
== DW_TAG_formal_parameter
)
17184 struct type
*arg_type
;
17186 /* DWARF version 2 has no clean way to discern C++
17187 static and non-static member functions. G++ helps
17188 GDB by marking the first parameter for non-static
17189 member functions (which is the this pointer) as
17190 artificial. We pass this information to
17191 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17193 DWARF version 3 added DW_AT_object_pointer, which GCC
17194 4.5 does not yet generate. */
17195 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17196 if (attr
!= nullptr)
17197 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17199 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17200 arg_type
= die_type (child_die
, cu
);
17202 /* RealView does not mark THIS as const, which the testsuite
17203 expects. GCC marks THIS as const in method definitions,
17204 but not in the class specifications (GCC PR 43053). */
17205 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17206 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17209 struct dwarf2_cu
*arg_cu
= cu
;
17210 const char *name
= dwarf2_name (child_die
, cu
);
17212 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17213 if (attr
!= nullptr)
17215 /* If the compiler emits this, use it. */
17216 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17219 else if (name
&& strcmp (name
, "this") == 0)
17220 /* Function definitions will have the argument names. */
17222 else if (name
== NULL
&& iparams
== 0)
17223 /* Declarations may not have the names, so like
17224 elsewhere in GDB, assume an artificial first
17225 argument is "this". */
17229 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17233 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17236 child_die
= child_die
->sibling
;
17243 static struct type
*
17244 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17246 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17247 const char *name
= NULL
;
17248 struct type
*this_type
, *target_type
;
17250 name
= dwarf2_full_name (NULL
, die
, cu
);
17251 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17252 TYPE_TARGET_STUB (this_type
) = 1;
17253 set_die_type (die
, this_type
, cu
);
17254 target_type
= die_type (die
, cu
);
17255 if (target_type
!= this_type
)
17256 TYPE_TARGET_TYPE (this_type
) = target_type
;
17259 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17260 spec and cause infinite loops in GDB. */
17261 complaint (_("Self-referential DW_TAG_typedef "
17262 "- DIE at %s [in module %s]"),
17263 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17264 TYPE_TARGET_TYPE (this_type
) = NULL
;
17268 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17269 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17270 Handle these by just returning the target type, rather than
17271 constructing an anonymous typedef type and trying to handle this
17273 set_die_type (die
, target_type
, cu
);
17274 return target_type
;
17279 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17280 (which may be different from NAME) to the architecture back-end to allow
17281 it to guess the correct format if necessary. */
17283 static struct type
*
17284 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17285 const char *name_hint
, enum bfd_endian byte_order
)
17287 struct gdbarch
*gdbarch
= objfile
->arch ();
17288 const struct floatformat
**format
;
17291 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17293 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17295 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17300 /* Allocate an integer type of size BITS and name NAME. */
17302 static struct type
*
17303 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17304 int bits
, int unsigned_p
, const char *name
)
17308 /* Versions of Intel's C Compiler generate an integer type called "void"
17309 instead of using DW_TAG_unspecified_type. This has been seen on
17310 at least versions 14, 17, and 18. */
17311 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17312 && strcmp (name
, "void") == 0)
17313 type
= objfile_type (objfile
)->builtin_void
;
17315 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17320 /* Initialise and return a floating point type of size BITS suitable for
17321 use as a component of a complex number. The NAME_HINT is passed through
17322 when initialising the floating point type and is the name of the complex
17325 As DWARF doesn't currently provide an explicit name for the components
17326 of a complex number, but it can be helpful to have these components
17327 named, we try to select a suitable name based on the size of the
17329 static struct type
*
17330 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17331 struct objfile
*objfile
,
17332 int bits
, const char *name_hint
,
17333 enum bfd_endian byte_order
)
17335 gdbarch
*gdbarch
= objfile
->arch ();
17336 struct type
*tt
= nullptr;
17338 /* Try to find a suitable floating point builtin type of size BITS.
17339 We're going to use the name of this type as the name for the complex
17340 target type that we are about to create. */
17341 switch (cu
->language
)
17343 case language_fortran
:
17347 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17350 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17352 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17354 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17362 tt
= builtin_type (gdbarch
)->builtin_float
;
17365 tt
= builtin_type (gdbarch
)->builtin_double
;
17367 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17369 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17375 /* If the type we found doesn't match the size we were looking for, then
17376 pretend we didn't find a type at all, the complex target type we
17377 create will then be nameless. */
17378 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17381 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
17382 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17385 /* Find a representation of a given base type and install
17386 it in the TYPE field of the die. */
17388 static struct type
*
17389 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17391 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17393 struct attribute
*attr
;
17394 int encoding
= 0, bits
= 0;
17398 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17399 if (attr
!= nullptr)
17400 encoding
= DW_UNSND (attr
);
17401 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17402 if (attr
!= nullptr)
17403 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17404 name
= dwarf2_name (die
, cu
);
17406 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17408 arch
= objfile
->arch ();
17409 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17411 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17414 int endianity
= DW_UNSND (attr
);
17419 byte_order
= BFD_ENDIAN_BIG
;
17421 case DW_END_little
:
17422 byte_order
= BFD_ENDIAN_LITTLE
;
17425 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17432 case DW_ATE_address
:
17433 /* Turn DW_ATE_address into a void * pointer. */
17434 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17435 type
= init_pointer_type (objfile
, bits
, name
, type
);
17437 case DW_ATE_boolean
:
17438 type
= init_boolean_type (objfile
, bits
, 1, name
);
17440 case DW_ATE_complex_float
:
17441 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17443 if (type
->code () == TYPE_CODE_ERROR
)
17445 if (name
== nullptr)
17447 struct obstack
*obstack
17448 = &cu
->per_objfile
->objfile
->objfile_obstack
;
17449 name
= obconcat (obstack
, "_Complex ", type
->name (),
17452 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17455 type
= init_complex_type (name
, type
);
17457 case DW_ATE_decimal_float
:
17458 type
= init_decfloat_type (objfile
, bits
, name
);
17461 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17463 case DW_ATE_signed
:
17464 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17466 case DW_ATE_unsigned
:
17467 if (cu
->language
== language_fortran
17469 && startswith (name
, "character("))
17470 type
= init_character_type (objfile
, bits
, 1, name
);
17472 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17474 case DW_ATE_signed_char
:
17475 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17476 || cu
->language
== language_pascal
17477 || cu
->language
== language_fortran
)
17478 type
= init_character_type (objfile
, bits
, 0, name
);
17480 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17482 case DW_ATE_unsigned_char
:
17483 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17484 || cu
->language
== language_pascal
17485 || cu
->language
== language_fortran
17486 || cu
->language
== language_rust
)
17487 type
= init_character_type (objfile
, bits
, 1, name
);
17489 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17494 type
= builtin_type (arch
)->builtin_char16
;
17495 else if (bits
== 32)
17496 type
= builtin_type (arch
)->builtin_char32
;
17499 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17501 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17503 return set_die_type (die
, type
, cu
);
17508 complaint (_("unsupported DW_AT_encoding: '%s'"),
17509 dwarf_type_encoding_name (encoding
));
17510 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17514 if (name
&& strcmp (name
, "char") == 0)
17515 TYPE_NOSIGN (type
) = 1;
17517 maybe_set_alignment (cu
, die
, type
);
17519 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17521 return set_die_type (die
, type
, cu
);
17524 /* Parse dwarf attribute if it's a block, reference or constant and put the
17525 resulting value of the attribute into struct bound_prop.
17526 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17529 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17530 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17531 struct type
*default_type
)
17533 struct dwarf2_property_baton
*baton
;
17534 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
17535 struct objfile
*objfile
= per_objfile
->objfile
;
17536 struct obstack
*obstack
= &objfile
->objfile_obstack
;
17538 gdb_assert (default_type
!= NULL
);
17540 if (attr
== NULL
|| prop
== NULL
)
17543 if (attr
->form_is_block ())
17545 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17546 baton
->property_type
= default_type
;
17547 baton
->locexpr
.per_cu
= cu
->per_cu
;
17548 baton
->locexpr
.per_objfile
= per_objfile
;
17549 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17550 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17551 switch (attr
->name
)
17553 case DW_AT_string_length
:
17554 baton
->locexpr
.is_reference
= true;
17557 baton
->locexpr
.is_reference
= false;
17560 prop
->data
.baton
= baton
;
17561 prop
->kind
= PROP_LOCEXPR
;
17562 gdb_assert (prop
->data
.baton
!= NULL
);
17564 else if (attr
->form_is_ref ())
17566 struct dwarf2_cu
*target_cu
= cu
;
17567 struct die_info
*target_die
;
17568 struct attribute
*target_attr
;
17570 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17571 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17572 if (target_attr
== NULL
)
17573 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17575 if (target_attr
== NULL
)
17578 switch (target_attr
->name
)
17580 case DW_AT_location
:
17581 if (target_attr
->form_is_section_offset ())
17583 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17584 baton
->property_type
= die_type (target_die
, target_cu
);
17585 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17586 prop
->data
.baton
= baton
;
17587 prop
->kind
= PROP_LOCLIST
;
17588 gdb_assert (prop
->data
.baton
!= NULL
);
17590 else if (target_attr
->form_is_block ())
17592 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17593 baton
->property_type
= die_type (target_die
, target_cu
);
17594 baton
->locexpr
.per_cu
= cu
->per_cu
;
17595 baton
->locexpr
.per_objfile
= per_objfile
;
17596 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17597 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17598 baton
->locexpr
.is_reference
= true;
17599 prop
->data
.baton
= baton
;
17600 prop
->kind
= PROP_LOCEXPR
;
17601 gdb_assert (prop
->data
.baton
!= NULL
);
17605 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17606 "dynamic property");
17610 case DW_AT_data_member_location
:
17614 if (!handle_data_member_location (target_die
, target_cu
,
17618 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17619 baton
->property_type
= read_type_die (target_die
->parent
,
17621 baton
->offset_info
.offset
= offset
;
17622 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17623 prop
->data
.baton
= baton
;
17624 prop
->kind
= PROP_ADDR_OFFSET
;
17629 else if (attr
->form_is_constant ())
17631 prop
->data
.const_val
= attr
->constant_value (0);
17632 prop
->kind
= PROP_CONST
;
17636 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17637 dwarf2_name (die
, cu
));
17647 dwarf2_per_objfile::int_type (int size_in_bytes
, bool unsigned_p
) const
17649 struct type
*int_type
;
17651 /* Helper macro to examine the various builtin types. */
17652 #define TRY_TYPE(F) \
17653 int_type = (unsigned_p \
17654 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17655 : objfile_type (objfile)->builtin_ ## F); \
17656 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17663 TRY_TYPE (long_long
);
17667 gdb_assert_not_reached ("unable to find suitable integer type");
17673 dwarf2_cu::addr_sized_int_type (bool unsigned_p
) const
17675 int addr_size
= this->per_cu
->addr_size ();
17676 return this->per_objfile
->int_type (addr_size
, unsigned_p
);
17679 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17680 present (which is valid) then compute the default type based on the
17681 compilation units address size. */
17683 static struct type
*
17684 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17686 struct type
*index_type
= die_type (die
, cu
);
17688 /* Dwarf-2 specifications explicitly allows to create subrange types
17689 without specifying a base type.
17690 In that case, the base type must be set to the type of
17691 the lower bound, upper bound or count, in that order, if any of these
17692 three attributes references an object that has a type.
17693 If no base type is found, the Dwarf-2 specifications say that
17694 a signed integer type of size equal to the size of an address should
17696 For the following C code: `extern char gdb_int [];'
17697 GCC produces an empty range DIE.
17698 FIXME: muller/2010-05-28: Possible references to object for low bound,
17699 high bound or count are not yet handled by this code. */
17700 if (index_type
->code () == TYPE_CODE_VOID
)
17701 index_type
= cu
->addr_sized_int_type (false);
17706 /* Read the given DW_AT_subrange DIE. */
17708 static struct type
*
17709 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17711 struct type
*base_type
, *orig_base_type
;
17712 struct type
*range_type
;
17713 struct attribute
*attr
;
17714 struct dynamic_prop low
, high
;
17715 int low_default_is_valid
;
17716 int high_bound_is_count
= 0;
17718 ULONGEST negative_mask
;
17720 orig_base_type
= read_subrange_index_type (die
, cu
);
17722 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17723 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17724 creating the range type, but we use the result of check_typedef
17725 when examining properties of the type. */
17726 base_type
= check_typedef (orig_base_type
);
17728 /* The die_type call above may have already set the type for this DIE. */
17729 range_type
= get_die_type (die
, cu
);
17733 low
.kind
= PROP_CONST
;
17734 high
.kind
= PROP_CONST
;
17735 high
.data
.const_val
= 0;
17737 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17738 omitting DW_AT_lower_bound. */
17739 switch (cu
->language
)
17742 case language_cplus
:
17743 low
.data
.const_val
= 0;
17744 low_default_is_valid
= 1;
17746 case language_fortran
:
17747 low
.data
.const_val
= 1;
17748 low_default_is_valid
= 1;
17751 case language_objc
:
17752 case language_rust
:
17753 low
.data
.const_val
= 0;
17754 low_default_is_valid
= (cu
->header
.version
>= 4);
17758 case language_pascal
:
17759 low
.data
.const_val
= 1;
17760 low_default_is_valid
= (cu
->header
.version
>= 4);
17763 low
.data
.const_val
= 0;
17764 low_default_is_valid
= 0;
17768 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17769 if (attr
!= nullptr)
17770 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17771 else if (!low_default_is_valid
)
17772 complaint (_("Missing DW_AT_lower_bound "
17773 "- DIE at %s [in module %s]"),
17774 sect_offset_str (die
->sect_off
),
17775 objfile_name (cu
->per_objfile
->objfile
));
17777 struct attribute
*attr_ub
, *attr_count
;
17778 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17779 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17781 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17782 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17784 /* If bounds are constant do the final calculation here. */
17785 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17786 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17788 high_bound_is_count
= 1;
17792 if (attr_ub
!= NULL
)
17793 complaint (_("Unresolved DW_AT_upper_bound "
17794 "- DIE at %s [in module %s]"),
17795 sect_offset_str (die
->sect_off
),
17796 objfile_name (cu
->per_objfile
->objfile
));
17797 if (attr_count
!= NULL
)
17798 complaint (_("Unresolved DW_AT_count "
17799 "- DIE at %s [in module %s]"),
17800 sect_offset_str (die
->sect_off
),
17801 objfile_name (cu
->per_objfile
->objfile
));
17806 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17807 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17808 bias
= bias_attr
->constant_value (0);
17810 /* Normally, the DWARF producers are expected to use a signed
17811 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17812 But this is unfortunately not always the case, as witnessed
17813 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17814 is used instead. To work around that ambiguity, we treat
17815 the bounds as signed, and thus sign-extend their values, when
17816 the base type is signed. */
17818 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17819 if (low
.kind
== PROP_CONST
17820 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17821 low
.data
.const_val
|= negative_mask
;
17822 if (high
.kind
== PROP_CONST
17823 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17824 high
.data
.const_val
|= negative_mask
;
17826 /* Check for bit and byte strides. */
17827 struct dynamic_prop byte_stride_prop
;
17828 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17829 if (attr_byte_stride
!= nullptr)
17831 struct type
*prop_type
= cu
->addr_sized_int_type (false);
17832 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17836 struct dynamic_prop bit_stride_prop
;
17837 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17838 if (attr_bit_stride
!= nullptr)
17840 /* It only makes sense to have either a bit or byte stride. */
17841 if (attr_byte_stride
!= nullptr)
17843 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17844 "- DIE at %s [in module %s]"),
17845 sect_offset_str (die
->sect_off
),
17846 objfile_name (cu
->per_objfile
->objfile
));
17847 attr_bit_stride
= nullptr;
17851 struct type
*prop_type
= cu
->addr_sized_int_type (false);
17852 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17857 if (attr_byte_stride
!= nullptr
17858 || attr_bit_stride
!= nullptr)
17860 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17861 struct dynamic_prop
*stride
17862 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17865 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17866 &high
, bias
, stride
, byte_stride_p
);
17869 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17871 if (high_bound_is_count
)
17872 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17874 /* Ada expects an empty array on no boundary attributes. */
17875 if (attr
== NULL
&& cu
->language
!= language_ada
)
17876 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17878 name
= dwarf2_name (die
, cu
);
17880 range_type
->set_name (name
);
17882 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17883 if (attr
!= nullptr)
17884 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17886 maybe_set_alignment (cu
, die
, range_type
);
17888 set_die_type (die
, range_type
, cu
);
17890 /* set_die_type should be already done. */
17891 set_descriptive_type (range_type
, die
, cu
);
17896 static struct type
*
17897 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17901 type
= init_type (cu
->per_objfile
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
17902 type
->set_name (dwarf2_name (die
, cu
));
17904 /* In Ada, an unspecified type is typically used when the description
17905 of the type is deferred to a different unit. When encountering
17906 such a type, we treat it as a stub, and try to resolve it later on,
17908 if (cu
->language
== language_ada
)
17909 TYPE_STUB (type
) = 1;
17911 return set_die_type (die
, type
, cu
);
17914 /* Read a single die and all its descendents. Set the die's sibling
17915 field to NULL; set other fields in the die correctly, and set all
17916 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17917 location of the info_ptr after reading all of those dies. PARENT
17918 is the parent of the die in question. */
17920 static struct die_info
*
17921 read_die_and_children (const struct die_reader_specs
*reader
,
17922 const gdb_byte
*info_ptr
,
17923 const gdb_byte
**new_info_ptr
,
17924 struct die_info
*parent
)
17926 struct die_info
*die
;
17927 const gdb_byte
*cur_ptr
;
17929 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17932 *new_info_ptr
= cur_ptr
;
17935 store_in_ref_table (die
, reader
->cu
);
17937 if (die
->has_children
)
17938 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17942 *new_info_ptr
= cur_ptr
;
17945 die
->sibling
= NULL
;
17946 die
->parent
= parent
;
17950 /* Read a die, all of its descendents, and all of its siblings; set
17951 all of the fields of all of the dies correctly. Arguments are as
17952 in read_die_and_children. */
17954 static struct die_info
*
17955 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17956 const gdb_byte
*info_ptr
,
17957 const gdb_byte
**new_info_ptr
,
17958 struct die_info
*parent
)
17960 struct die_info
*first_die
, *last_sibling
;
17961 const gdb_byte
*cur_ptr
;
17963 cur_ptr
= info_ptr
;
17964 first_die
= last_sibling
= NULL
;
17968 struct die_info
*die
17969 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17973 *new_info_ptr
= cur_ptr
;
17980 last_sibling
->sibling
= die
;
17982 last_sibling
= die
;
17986 /* Read a die, all of its descendents, and all of its siblings; set
17987 all of the fields of all of the dies correctly. Arguments are as
17988 in read_die_and_children.
17989 This the main entry point for reading a DIE and all its children. */
17991 static struct die_info
*
17992 read_die_and_siblings (const struct die_reader_specs
*reader
,
17993 const gdb_byte
*info_ptr
,
17994 const gdb_byte
**new_info_ptr
,
17995 struct die_info
*parent
)
17997 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17998 new_info_ptr
, parent
);
18000 if (dwarf_die_debug
)
18002 fprintf_unfiltered (gdb_stdlog
,
18003 "Read die from %s@0x%x of %s:\n",
18004 reader
->die_section
->get_name (),
18005 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18006 bfd_get_filename (reader
->abfd
));
18007 dump_die (die
, dwarf_die_debug
);
18013 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18015 The caller is responsible for filling in the extra attributes
18016 and updating (*DIEP)->num_attrs.
18017 Set DIEP to point to a newly allocated die with its information,
18018 except for its child, sibling, and parent fields. */
18020 static const gdb_byte
*
18021 read_full_die_1 (const struct die_reader_specs
*reader
,
18022 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18023 int num_extra_attrs
)
18025 unsigned int abbrev_number
, bytes_read
, i
;
18026 struct abbrev_info
*abbrev
;
18027 struct die_info
*die
;
18028 struct dwarf2_cu
*cu
= reader
->cu
;
18029 bfd
*abfd
= reader
->abfd
;
18031 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18032 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18033 info_ptr
+= bytes_read
;
18034 if (!abbrev_number
)
18040 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18042 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18044 bfd_get_filename (abfd
));
18046 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18047 die
->sect_off
= sect_off
;
18048 die
->tag
= abbrev
->tag
;
18049 die
->abbrev
= abbrev_number
;
18050 die
->has_children
= abbrev
->has_children
;
18052 /* Make the result usable.
18053 The caller needs to update num_attrs after adding the extra
18055 die
->num_attrs
= abbrev
->num_attrs
;
18057 std::vector
<int> indexes_that_need_reprocess
;
18058 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18060 bool need_reprocess
;
18062 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18063 info_ptr
, &need_reprocess
);
18064 if (need_reprocess
)
18065 indexes_that_need_reprocess
.push_back (i
);
18068 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
18069 if (attr
!= nullptr)
18070 cu
->str_offsets_base
= DW_UNSND (attr
);
18072 attr
= die
->attr (DW_AT_loclists_base
);
18073 if (attr
!= nullptr)
18074 cu
->loclist_base
= DW_UNSND (attr
);
18076 auto maybe_addr_base
= die
->addr_base ();
18077 if (maybe_addr_base
.has_value ())
18078 cu
->addr_base
= *maybe_addr_base
;
18079 for (int index
: indexes_that_need_reprocess
)
18080 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
18085 /* Read a die and all its attributes.
18086 Set DIEP to point to a newly allocated die with its information,
18087 except for its child, sibling, and parent fields. */
18089 static const gdb_byte
*
18090 read_full_die (const struct die_reader_specs
*reader
,
18091 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18093 const gdb_byte
*result
;
18095 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18097 if (dwarf_die_debug
)
18099 fprintf_unfiltered (gdb_stdlog
,
18100 "Read die from %s@0x%x of %s:\n",
18101 reader
->die_section
->get_name (),
18102 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18103 bfd_get_filename (reader
->abfd
));
18104 dump_die (*diep
, dwarf_die_debug
);
18111 /* Returns nonzero if TAG represents a type that we might generate a partial
18115 is_type_tag_for_partial (int tag
)
18120 /* Some types that would be reasonable to generate partial symbols for,
18121 that we don't at present. */
18122 case DW_TAG_array_type
:
18123 case DW_TAG_file_type
:
18124 case DW_TAG_ptr_to_member_type
:
18125 case DW_TAG_set_type
:
18126 case DW_TAG_string_type
:
18127 case DW_TAG_subroutine_type
:
18129 case DW_TAG_base_type
:
18130 case DW_TAG_class_type
:
18131 case DW_TAG_interface_type
:
18132 case DW_TAG_enumeration_type
:
18133 case DW_TAG_structure_type
:
18134 case DW_TAG_subrange_type
:
18135 case DW_TAG_typedef
:
18136 case DW_TAG_union_type
:
18143 /* Load all DIEs that are interesting for partial symbols into memory. */
18145 static struct partial_die_info
*
18146 load_partial_dies (const struct die_reader_specs
*reader
,
18147 const gdb_byte
*info_ptr
, int building_psymtab
)
18149 struct dwarf2_cu
*cu
= reader
->cu
;
18150 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18151 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18152 unsigned int bytes_read
;
18153 unsigned int load_all
= 0;
18154 int nesting_level
= 1;
18159 gdb_assert (cu
->per_cu
!= NULL
);
18160 if (cu
->per_cu
->load_all_dies
)
18164 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18168 &cu
->comp_unit_obstack
,
18169 hashtab_obstack_allocate
,
18170 dummy_obstack_deallocate
);
18174 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18176 /* A NULL abbrev means the end of a series of children. */
18177 if (abbrev
== NULL
)
18179 if (--nesting_level
== 0)
18182 info_ptr
+= bytes_read
;
18183 last_die
= parent_die
;
18184 parent_die
= parent_die
->die_parent
;
18188 /* Check for template arguments. We never save these; if
18189 they're seen, we just mark the parent, and go on our way. */
18190 if (parent_die
!= NULL
18191 && cu
->language
== language_cplus
18192 && (abbrev
->tag
== DW_TAG_template_type_param
18193 || abbrev
->tag
== DW_TAG_template_value_param
))
18195 parent_die
->has_template_arguments
= 1;
18199 /* We don't need a partial DIE for the template argument. */
18200 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18205 /* We only recurse into c++ subprograms looking for template arguments.
18206 Skip their other children. */
18208 && cu
->language
== language_cplus
18209 && parent_die
!= NULL
18210 && parent_die
->tag
== DW_TAG_subprogram
)
18212 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18216 /* Check whether this DIE is interesting enough to save. Normally
18217 we would not be interested in members here, but there may be
18218 later variables referencing them via DW_AT_specification (for
18219 static members). */
18221 && !is_type_tag_for_partial (abbrev
->tag
)
18222 && abbrev
->tag
!= DW_TAG_constant
18223 && abbrev
->tag
!= DW_TAG_enumerator
18224 && abbrev
->tag
!= DW_TAG_subprogram
18225 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18226 && abbrev
->tag
!= DW_TAG_lexical_block
18227 && abbrev
->tag
!= DW_TAG_variable
18228 && abbrev
->tag
!= DW_TAG_namespace
18229 && abbrev
->tag
!= DW_TAG_module
18230 && abbrev
->tag
!= DW_TAG_member
18231 && abbrev
->tag
!= DW_TAG_imported_unit
18232 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18234 /* Otherwise we skip to the next sibling, if any. */
18235 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18239 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18242 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18244 /* This two-pass algorithm for processing partial symbols has a
18245 high cost in cache pressure. Thus, handle some simple cases
18246 here which cover the majority of C partial symbols. DIEs
18247 which neither have specification tags in them, nor could have
18248 specification tags elsewhere pointing at them, can simply be
18249 processed and discarded.
18251 This segment is also optional; scan_partial_symbols and
18252 add_partial_symbol will handle these DIEs if we chain
18253 them in normally. When compilers which do not emit large
18254 quantities of duplicate debug information are more common,
18255 this code can probably be removed. */
18257 /* Any complete simple types at the top level (pretty much all
18258 of them, for a language without namespaces), can be processed
18260 if (parent_die
== NULL
18261 && pdi
.has_specification
== 0
18262 && pdi
.is_declaration
== 0
18263 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18264 || pdi
.tag
== DW_TAG_base_type
18265 || pdi
.tag
== DW_TAG_subrange_type
))
18267 if (building_psymtab
&& pdi
.name
!= NULL
)
18268 add_psymbol_to_list (pdi
.name
, false,
18269 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18270 psymbol_placement::STATIC
,
18271 0, cu
->language
, objfile
);
18272 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18276 /* The exception for DW_TAG_typedef with has_children above is
18277 a workaround of GCC PR debug/47510. In the case of this complaint
18278 type_name_or_error will error on such types later.
18280 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18281 it could not find the child DIEs referenced later, this is checked
18282 above. In correct DWARF DW_TAG_typedef should have no children. */
18284 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18285 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18286 "- DIE at %s [in module %s]"),
18287 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18289 /* If we're at the second level, and we're an enumerator, and
18290 our parent has no specification (meaning possibly lives in a
18291 namespace elsewhere), then we can add the partial symbol now
18292 instead of queueing it. */
18293 if (pdi
.tag
== DW_TAG_enumerator
18294 && parent_die
!= NULL
18295 && parent_die
->die_parent
== NULL
18296 && parent_die
->tag
== DW_TAG_enumeration_type
18297 && parent_die
->has_specification
== 0)
18299 if (pdi
.name
== NULL
)
18300 complaint (_("malformed enumerator DIE ignored"));
18301 else if (building_psymtab
)
18302 add_psymbol_to_list (pdi
.name
, false,
18303 VAR_DOMAIN
, LOC_CONST
, -1,
18304 cu
->language
== language_cplus
18305 ? psymbol_placement::GLOBAL
18306 : psymbol_placement::STATIC
,
18307 0, cu
->language
, objfile
);
18309 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18313 struct partial_die_info
*part_die
18314 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18316 /* We'll save this DIE so link it in. */
18317 part_die
->die_parent
= parent_die
;
18318 part_die
->die_sibling
= NULL
;
18319 part_die
->die_child
= NULL
;
18321 if (last_die
&& last_die
== parent_die
)
18322 last_die
->die_child
= part_die
;
18324 last_die
->die_sibling
= part_die
;
18326 last_die
= part_die
;
18328 if (first_die
== NULL
)
18329 first_die
= part_die
;
18331 /* Maybe add the DIE to the hash table. Not all DIEs that we
18332 find interesting need to be in the hash table, because we
18333 also have the parent/sibling/child chains; only those that we
18334 might refer to by offset later during partial symbol reading.
18336 For now this means things that might have be the target of a
18337 DW_AT_specification, DW_AT_abstract_origin, or
18338 DW_AT_extension. DW_AT_extension will refer only to
18339 namespaces; DW_AT_abstract_origin refers to functions (and
18340 many things under the function DIE, but we do not recurse
18341 into function DIEs during partial symbol reading) and
18342 possibly variables as well; DW_AT_specification refers to
18343 declarations. Declarations ought to have the DW_AT_declaration
18344 flag. It happens that GCC forgets to put it in sometimes, but
18345 only for functions, not for types.
18347 Adding more things than necessary to the hash table is harmless
18348 except for the performance cost. Adding too few will result in
18349 wasted time in find_partial_die, when we reread the compilation
18350 unit with load_all_dies set. */
18353 || abbrev
->tag
== DW_TAG_constant
18354 || abbrev
->tag
== DW_TAG_subprogram
18355 || abbrev
->tag
== DW_TAG_variable
18356 || abbrev
->tag
== DW_TAG_namespace
18357 || part_die
->is_declaration
)
18361 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18362 to_underlying (part_die
->sect_off
),
18367 /* For some DIEs we want to follow their children (if any). For C
18368 we have no reason to follow the children of structures; for other
18369 languages we have to, so that we can get at method physnames
18370 to infer fully qualified class names, for DW_AT_specification,
18371 and for C++ template arguments. For C++, we also look one level
18372 inside functions to find template arguments (if the name of the
18373 function does not already contain the template arguments).
18375 For Ada and Fortran, we need to scan the children of subprograms
18376 and lexical blocks as well because these languages allow the
18377 definition of nested entities that could be interesting for the
18378 debugger, such as nested subprograms for instance. */
18379 if (last_die
->has_children
18381 || last_die
->tag
== DW_TAG_namespace
18382 || last_die
->tag
== DW_TAG_module
18383 || last_die
->tag
== DW_TAG_enumeration_type
18384 || (cu
->language
== language_cplus
18385 && last_die
->tag
== DW_TAG_subprogram
18386 && (last_die
->name
== NULL
18387 || strchr (last_die
->name
, '<') == NULL
))
18388 || (cu
->language
!= language_c
18389 && (last_die
->tag
== DW_TAG_class_type
18390 || last_die
->tag
== DW_TAG_interface_type
18391 || last_die
->tag
== DW_TAG_structure_type
18392 || last_die
->tag
== DW_TAG_union_type
))
18393 || ((cu
->language
== language_ada
18394 || cu
->language
== language_fortran
)
18395 && (last_die
->tag
== DW_TAG_subprogram
18396 || last_die
->tag
== DW_TAG_lexical_block
))))
18399 parent_die
= last_die
;
18403 /* Otherwise we skip to the next sibling, if any. */
18404 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18406 /* Back to the top, do it again. */
18410 partial_die_info::partial_die_info (sect_offset sect_off_
,
18411 struct abbrev_info
*abbrev
)
18412 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18416 /* Read a minimal amount of information into the minimal die structure.
18417 INFO_PTR should point just after the initial uleb128 of a DIE. */
18420 partial_die_info::read (const struct die_reader_specs
*reader
,
18421 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18423 struct dwarf2_cu
*cu
= reader
->cu
;
18424 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18426 int has_low_pc_attr
= 0;
18427 int has_high_pc_attr
= 0;
18428 int high_pc_relative
= 0;
18430 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18433 bool need_reprocess
;
18434 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18435 info_ptr
, &need_reprocess
);
18436 /* String and address offsets that need to do the reprocessing have
18437 already been read at this point, so there is no need to wait until
18438 the loop terminates to do the reprocessing. */
18439 if (need_reprocess
)
18440 read_attribute_reprocess (reader
, &attr
);
18441 /* Store the data if it is of an attribute we want to keep in a
18442 partial symbol table. */
18448 case DW_TAG_compile_unit
:
18449 case DW_TAG_partial_unit
:
18450 case DW_TAG_type_unit
:
18451 /* Compilation units have a DW_AT_name that is a filename, not
18452 a source language identifier. */
18453 case DW_TAG_enumeration_type
:
18454 case DW_TAG_enumerator
:
18455 /* These tags always have simple identifiers already; no need
18456 to canonicalize them. */
18457 name
= DW_STRING (&attr
);
18461 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18464 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18469 case DW_AT_linkage_name
:
18470 case DW_AT_MIPS_linkage_name
:
18471 /* Note that both forms of linkage name might appear. We
18472 assume they will be the same, and we only store the last
18474 linkage_name
= attr
.value_as_string ();
18475 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18476 See https://github.com/rust-lang/rust/issues/32925. */
18477 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18478 && strchr (linkage_name
, '{') != NULL
)
18479 linkage_name
= NULL
;
18482 has_low_pc_attr
= 1;
18483 lowpc
= attr
.value_as_address ();
18485 case DW_AT_high_pc
:
18486 has_high_pc_attr
= 1;
18487 highpc
= attr
.value_as_address ();
18488 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18489 high_pc_relative
= 1;
18491 case DW_AT_location
:
18492 /* Support the .debug_loc offsets. */
18493 if (attr
.form_is_block ())
18495 d
.locdesc
= DW_BLOCK (&attr
);
18497 else if (attr
.form_is_section_offset ())
18499 dwarf2_complex_location_expr_complaint ();
18503 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18504 "partial symbol information");
18507 case DW_AT_external
:
18508 is_external
= DW_UNSND (&attr
);
18510 case DW_AT_declaration
:
18511 is_declaration
= DW_UNSND (&attr
);
18516 case DW_AT_abstract_origin
:
18517 case DW_AT_specification
:
18518 case DW_AT_extension
:
18519 has_specification
= 1;
18520 spec_offset
= attr
.get_ref_die_offset ();
18521 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18522 || cu
->per_cu
->is_dwz
);
18524 case DW_AT_sibling
:
18525 /* Ignore absolute siblings, they might point outside of
18526 the current compile unit. */
18527 if (attr
.form
== DW_FORM_ref_addr
)
18528 complaint (_("ignoring absolute DW_AT_sibling"));
18531 const gdb_byte
*buffer
= reader
->buffer
;
18532 sect_offset off
= attr
.get_ref_die_offset ();
18533 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18535 if (sibling_ptr
< info_ptr
)
18536 complaint (_("DW_AT_sibling points backwards"));
18537 else if (sibling_ptr
> reader
->buffer_end
)
18538 reader
->die_section
->overflow_complaint ();
18540 sibling
= sibling_ptr
;
18543 case DW_AT_byte_size
:
18546 case DW_AT_const_value
:
18547 has_const_value
= 1;
18549 case DW_AT_calling_convention
:
18550 /* DWARF doesn't provide a way to identify a program's source-level
18551 entry point. DW_AT_calling_convention attributes are only meant
18552 to describe functions' calling conventions.
18554 However, because it's a necessary piece of information in
18555 Fortran, and before DWARF 4 DW_CC_program was the only
18556 piece of debugging information whose definition refers to
18557 a 'main program' at all, several compilers marked Fortran
18558 main programs with DW_CC_program --- even when those
18559 functions use the standard calling conventions.
18561 Although DWARF now specifies a way to provide this
18562 information, we support this practice for backward
18564 if (DW_UNSND (&attr
) == DW_CC_program
18565 && cu
->language
== language_fortran
)
18566 main_subprogram
= 1;
18569 if (DW_UNSND (&attr
) == DW_INL_inlined
18570 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18571 may_be_inlined
= 1;
18575 if (tag
== DW_TAG_imported_unit
)
18577 d
.sect_off
= attr
.get_ref_die_offset ();
18578 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18579 || cu
->per_cu
->is_dwz
);
18583 case DW_AT_main_subprogram
:
18584 main_subprogram
= DW_UNSND (&attr
);
18589 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18590 but that requires a full DIE, so instead we just
18592 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18593 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18594 + (need_ranges_base
18598 /* Value of the DW_AT_ranges attribute is the offset in the
18599 .debug_ranges section. */
18600 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18611 /* For Ada, if both the name and the linkage name appear, we prefer
18612 the latter. This lets "catch exception" work better, regardless
18613 of the order in which the name and linkage name were emitted.
18614 Really, though, this is just a workaround for the fact that gdb
18615 doesn't store both the name and the linkage name. */
18616 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18617 name
= linkage_name
;
18619 if (high_pc_relative
)
18622 if (has_low_pc_attr
&& has_high_pc_attr
)
18624 /* When using the GNU linker, .gnu.linkonce. sections are used to
18625 eliminate duplicate copies of functions and vtables and such.
18626 The linker will arbitrarily choose one and discard the others.
18627 The AT_*_pc values for such functions refer to local labels in
18628 these sections. If the section from that file was discarded, the
18629 labels are not in the output, so the relocs get a value of 0.
18630 If this is a discarded function, mark the pc bounds as invalid,
18631 so that GDB will ignore it. */
18632 if (lowpc
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
18634 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18635 struct gdbarch
*gdbarch
= objfile
->arch ();
18637 complaint (_("DW_AT_low_pc %s is zero "
18638 "for DIE at %s [in module %s]"),
18639 paddress (gdbarch
, lowpc
),
18640 sect_offset_str (sect_off
),
18641 objfile_name (objfile
));
18643 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18644 else if (lowpc
>= highpc
)
18646 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18647 struct gdbarch
*gdbarch
= objfile
->arch ();
18649 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18650 "for DIE at %s [in module %s]"),
18651 paddress (gdbarch
, lowpc
),
18652 paddress (gdbarch
, highpc
),
18653 sect_offset_str (sect_off
),
18654 objfile_name (objfile
));
18663 /* Find a cached partial DIE at OFFSET in CU. */
18665 struct partial_die_info
*
18666 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18668 struct partial_die_info
*lookup_die
= NULL
;
18669 struct partial_die_info
part_die (sect_off
);
18671 lookup_die
= ((struct partial_die_info
*)
18672 htab_find_with_hash (partial_dies
, &part_die
,
18673 to_underlying (sect_off
)));
18678 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18679 except in the case of .debug_types DIEs which do not reference
18680 outside their CU (they do however referencing other types via
18681 DW_FORM_ref_sig8). */
18683 static const struct cu_partial_die_info
18684 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18686 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18687 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18688 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18689 struct partial_die_info
*pd
= NULL
;
18691 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18692 && cu
->header
.offset_in_cu_p (sect_off
))
18694 pd
= cu
->find_partial_die (sect_off
);
18697 /* We missed recording what we needed.
18698 Load all dies and try again. */
18699 per_cu
= cu
->per_cu
;
18703 /* TUs don't reference other CUs/TUs (except via type signatures). */
18704 if (cu
->per_cu
->is_debug_types
)
18706 error (_("Dwarf Error: Type Unit at offset %s contains"
18707 " external reference to offset %s [in module %s].\n"),
18708 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18709 bfd_get_filename (objfile
->obfd
));
18711 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18712 dwarf2_per_objfile
);
18714 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18715 load_partial_comp_unit (per_cu
, cu
->per_objfile
);
18717 per_cu
->cu
->last_used
= 0;
18718 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18721 /* If we didn't find it, and not all dies have been loaded,
18722 load them all and try again. */
18724 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18726 per_cu
->load_all_dies
= 1;
18728 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18729 THIS_CU->cu may already be in use. So we can't just free it and
18730 replace its DIEs with the ones we read in. Instead, we leave those
18731 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18732 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18734 load_partial_comp_unit (per_cu
, cu
->per_objfile
);
18736 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18740 internal_error (__FILE__
, __LINE__
,
18741 _("could not find partial DIE %s "
18742 "in cache [from module %s]\n"),
18743 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18744 return { per_cu
->cu
, pd
};
18747 /* See if we can figure out if the class lives in a namespace. We do
18748 this by looking for a member function; its demangled name will
18749 contain namespace info, if there is any. */
18752 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18753 struct dwarf2_cu
*cu
)
18755 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18756 what template types look like, because the demangler
18757 frequently doesn't give the same name as the debug info. We
18758 could fix this by only using the demangled name to get the
18759 prefix (but see comment in read_structure_type). */
18761 struct partial_die_info
*real_pdi
;
18762 struct partial_die_info
*child_pdi
;
18764 /* If this DIE (this DIE's specification, if any) has a parent, then
18765 we should not do this. We'll prepend the parent's fully qualified
18766 name when we create the partial symbol. */
18768 real_pdi
= struct_pdi
;
18769 while (real_pdi
->has_specification
)
18771 auto res
= find_partial_die (real_pdi
->spec_offset
,
18772 real_pdi
->spec_is_dwz
, cu
);
18773 real_pdi
= res
.pdi
;
18777 if (real_pdi
->die_parent
!= NULL
)
18780 for (child_pdi
= struct_pdi
->die_child
;
18782 child_pdi
= child_pdi
->die_sibling
)
18784 if (child_pdi
->tag
== DW_TAG_subprogram
18785 && child_pdi
->linkage_name
!= NULL
)
18787 gdb::unique_xmalloc_ptr
<char> actual_class_name
18788 (language_class_name_from_physname (cu
->language_defn
,
18789 child_pdi
->linkage_name
));
18790 if (actual_class_name
!= NULL
)
18792 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18793 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18800 /* Return true if a DIE with TAG may have the DW_AT_const_value
18804 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18808 case DW_TAG_constant
:
18809 case DW_TAG_enumerator
:
18810 case DW_TAG_formal_parameter
:
18811 case DW_TAG_template_value_param
:
18812 case DW_TAG_variable
:
18820 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18822 /* Once we've fixed up a die, there's no point in doing so again.
18823 This also avoids a memory leak if we were to call
18824 guess_partial_die_structure_name multiple times. */
18828 /* If we found a reference attribute and the DIE has no name, try
18829 to find a name in the referred to DIE. */
18831 if (name
== NULL
&& has_specification
)
18833 struct partial_die_info
*spec_die
;
18835 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18836 spec_die
= res
.pdi
;
18839 spec_die
->fixup (cu
);
18841 if (spec_die
->name
)
18843 name
= spec_die
->name
;
18845 /* Copy DW_AT_external attribute if it is set. */
18846 if (spec_die
->is_external
)
18847 is_external
= spec_die
->is_external
;
18851 if (!has_const_value
&& has_specification
18852 && can_have_DW_AT_const_value_p (tag
))
18854 struct partial_die_info
*spec_die
;
18856 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18857 spec_die
= res
.pdi
;
18860 spec_die
->fixup (cu
);
18862 if (spec_die
->has_const_value
)
18864 /* Copy DW_AT_const_value attribute if it is set. */
18865 has_const_value
= spec_die
->has_const_value
;
18869 /* Set default names for some unnamed DIEs. */
18871 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18872 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18874 /* If there is no parent die to provide a namespace, and there are
18875 children, see if we can determine the namespace from their linkage
18877 if (cu
->language
== language_cplus
18878 && !cu
->per_objfile
->per_bfd
->types
.empty ()
18879 && die_parent
== NULL
18881 && (tag
== DW_TAG_class_type
18882 || tag
== DW_TAG_structure_type
18883 || tag
== DW_TAG_union_type
))
18884 guess_partial_die_structure_name (this, cu
);
18886 /* GCC might emit a nameless struct or union that has a linkage
18887 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18889 && (tag
== DW_TAG_class_type
18890 || tag
== DW_TAG_interface_type
18891 || tag
== DW_TAG_structure_type
18892 || tag
== DW_TAG_union_type
)
18893 && linkage_name
!= NULL
)
18895 gdb::unique_xmalloc_ptr
<char> demangled
18896 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18897 if (demangled
!= nullptr)
18901 /* Strip any leading namespaces/classes, keep only the base name.
18902 DW_AT_name for named DIEs does not contain the prefixes. */
18903 base
= strrchr (demangled
.get (), ':');
18904 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18907 base
= demangled
.get ();
18909 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18910 name
= objfile
->intern (base
);
18917 /* Read the .debug_loclists header contents from the given SECTION in the
18920 read_loclist_header (struct loclist_header
*header
,
18921 struct dwarf2_section_info
*section
)
18923 unsigned int bytes_read
;
18924 bfd
*abfd
= section
->get_bfd_owner ();
18925 const gdb_byte
*info_ptr
= section
->buffer
;
18926 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18927 info_ptr
+= bytes_read
;
18928 header
->version
= read_2_bytes (abfd
, info_ptr
);
18930 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18932 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18934 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18937 /* Return the DW_AT_loclists_base value for the CU. */
18939 lookup_loclist_base (struct dwarf2_cu
*cu
)
18941 /* For the .dwo unit, the loclist_base points to the first offset following
18942 the header. The header consists of the following entities-
18943 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18945 2. version (2 bytes)
18946 3. address size (1 byte)
18947 4. segment selector size (1 byte)
18948 5. offset entry count (4 bytes)
18949 These sizes are derived as per the DWARFv5 standard. */
18950 if (cu
->dwo_unit
!= nullptr)
18952 if (cu
->header
.initial_length_size
== 4)
18953 return LOCLIST_HEADER_SIZE32
;
18954 return LOCLIST_HEADER_SIZE64
;
18956 return cu
->loclist_base
;
18959 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18960 array of offsets in the .debug_loclists section. */
18962 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18964 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18965 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18966 bfd
*abfd
= objfile
->obfd
;
18967 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18968 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18970 section
->read (objfile
);
18971 if (section
->buffer
== NULL
)
18972 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18973 "section [in module %s]"), objfile_name (objfile
));
18974 struct loclist_header header
;
18975 read_loclist_header (&header
, section
);
18976 if (loclist_index
>= header
.offset_entry_count
)
18977 complaint (_("DW_FORM_loclistx pointing outside of "
18978 ".debug_loclists offset array [in module %s]"),
18979 objfile_name (objfile
));
18980 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18982 complaint (_("DW_FORM_loclistx pointing outside of "
18983 ".debug_loclists section [in module %s]"),
18984 objfile_name (objfile
));
18985 const gdb_byte
*info_ptr
18986 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18988 if (cu
->header
.offset_size
== 4)
18989 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18991 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18994 /* Process the attributes that had to be skipped in the first round. These
18995 attributes are the ones that need str_offsets_base or addr_base attributes.
18996 They could not have been processed in the first round, because at the time
18997 the values of str_offsets_base or addr_base may not have been known. */
18999 read_attribute_reprocess (const struct die_reader_specs
*reader
,
19000 struct attribute
*attr
)
19002 struct dwarf2_cu
*cu
= reader
->cu
;
19003 switch (attr
->form
)
19005 case DW_FORM_addrx
:
19006 case DW_FORM_GNU_addr_index
:
19007 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
19009 case DW_FORM_loclistx
:
19010 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
19013 case DW_FORM_strx1
:
19014 case DW_FORM_strx2
:
19015 case DW_FORM_strx3
:
19016 case DW_FORM_strx4
:
19017 case DW_FORM_GNU_str_index
:
19019 unsigned int str_index
= DW_UNSND (attr
);
19020 if (reader
->dwo_file
!= NULL
)
19022 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
19023 DW_STRING_IS_CANONICAL (attr
) = 0;
19027 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
19028 DW_STRING_IS_CANONICAL (attr
) = 0;
19033 gdb_assert_not_reached (_("Unexpected DWARF form."));
19037 /* Read an attribute value described by an attribute form. */
19039 static const gdb_byte
*
19040 read_attribute_value (const struct die_reader_specs
*reader
,
19041 struct attribute
*attr
, unsigned form
,
19042 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
19043 bool *need_reprocess
)
19045 struct dwarf2_cu
*cu
= reader
->cu
;
19046 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19047 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19048 bfd
*abfd
= reader
->abfd
;
19049 struct comp_unit_head
*cu_header
= &cu
->header
;
19050 unsigned int bytes_read
;
19051 struct dwarf_block
*blk
;
19052 *need_reprocess
= false;
19054 attr
->form
= (enum dwarf_form
) form
;
19057 case DW_FORM_ref_addr
:
19058 if (cu
->header
.version
== 2)
19059 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
19062 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
19064 info_ptr
+= bytes_read
;
19066 case DW_FORM_GNU_ref_alt
:
19067 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19068 info_ptr
+= bytes_read
;
19072 struct gdbarch
*gdbarch
= objfile
->arch ();
19073 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
19074 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19075 info_ptr
+= bytes_read
;
19078 case DW_FORM_block2
:
19079 blk
= dwarf_alloc_block (cu
);
19080 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19082 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19083 info_ptr
+= blk
->size
;
19084 DW_BLOCK (attr
) = blk
;
19086 case DW_FORM_block4
:
19087 blk
= dwarf_alloc_block (cu
);
19088 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19090 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19091 info_ptr
+= blk
->size
;
19092 DW_BLOCK (attr
) = blk
;
19094 case DW_FORM_data2
:
19095 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19098 case DW_FORM_data4
:
19099 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19102 case DW_FORM_data8
:
19103 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19106 case DW_FORM_data16
:
19107 blk
= dwarf_alloc_block (cu
);
19109 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19111 DW_BLOCK (attr
) = blk
;
19113 case DW_FORM_sec_offset
:
19114 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19115 info_ptr
+= bytes_read
;
19117 case DW_FORM_loclistx
:
19119 *need_reprocess
= true;
19120 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19121 info_ptr
+= bytes_read
;
19124 case DW_FORM_string
:
19125 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19126 DW_STRING_IS_CANONICAL (attr
) = 0;
19127 info_ptr
+= bytes_read
;
19130 if (!cu
->per_cu
->is_dwz
)
19132 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19133 abfd
, info_ptr
, cu_header
,
19135 DW_STRING_IS_CANONICAL (attr
) = 0;
19136 info_ptr
+= bytes_read
;
19140 case DW_FORM_line_strp
:
19141 if (!cu
->per_cu
->is_dwz
)
19144 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
19146 DW_STRING_IS_CANONICAL (attr
) = 0;
19147 info_ptr
+= bytes_read
;
19151 case DW_FORM_GNU_strp_alt
:
19153 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
19154 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19157 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
19158 DW_STRING_IS_CANONICAL (attr
) = 0;
19159 info_ptr
+= bytes_read
;
19162 case DW_FORM_exprloc
:
19163 case DW_FORM_block
:
19164 blk
= dwarf_alloc_block (cu
);
19165 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19166 info_ptr
+= bytes_read
;
19167 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19168 info_ptr
+= blk
->size
;
19169 DW_BLOCK (attr
) = blk
;
19171 case DW_FORM_block1
:
19172 blk
= dwarf_alloc_block (cu
);
19173 blk
->size
= read_1_byte (abfd
, info_ptr
);
19175 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19176 info_ptr
+= blk
->size
;
19177 DW_BLOCK (attr
) = blk
;
19179 case DW_FORM_data1
:
19180 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19184 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19187 case DW_FORM_flag_present
:
19188 DW_UNSND (attr
) = 1;
19190 case DW_FORM_sdata
:
19191 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19192 info_ptr
+= bytes_read
;
19194 case DW_FORM_udata
:
19195 case DW_FORM_rnglistx
:
19196 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19197 info_ptr
+= bytes_read
;
19200 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19201 + read_1_byte (abfd
, info_ptr
));
19205 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19206 + read_2_bytes (abfd
, info_ptr
));
19210 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19211 + read_4_bytes (abfd
, info_ptr
));
19215 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19216 + read_8_bytes (abfd
, info_ptr
));
19219 case DW_FORM_ref_sig8
:
19220 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19223 case DW_FORM_ref_udata
:
19224 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19225 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19226 info_ptr
+= bytes_read
;
19228 case DW_FORM_indirect
:
19229 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19230 info_ptr
+= bytes_read
;
19231 if (form
== DW_FORM_implicit_const
)
19233 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19234 info_ptr
+= bytes_read
;
19236 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19237 info_ptr
, need_reprocess
);
19239 case DW_FORM_implicit_const
:
19240 DW_SND (attr
) = implicit_const
;
19242 case DW_FORM_addrx
:
19243 case DW_FORM_GNU_addr_index
:
19244 *need_reprocess
= true;
19245 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19246 info_ptr
+= bytes_read
;
19249 case DW_FORM_strx1
:
19250 case DW_FORM_strx2
:
19251 case DW_FORM_strx3
:
19252 case DW_FORM_strx4
:
19253 case DW_FORM_GNU_str_index
:
19255 ULONGEST str_index
;
19256 if (form
== DW_FORM_strx1
)
19258 str_index
= read_1_byte (abfd
, info_ptr
);
19261 else if (form
== DW_FORM_strx2
)
19263 str_index
= read_2_bytes (abfd
, info_ptr
);
19266 else if (form
== DW_FORM_strx3
)
19268 str_index
= read_3_bytes (abfd
, info_ptr
);
19271 else if (form
== DW_FORM_strx4
)
19273 str_index
= read_4_bytes (abfd
, info_ptr
);
19278 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19279 info_ptr
+= bytes_read
;
19281 *need_reprocess
= true;
19282 DW_UNSND (attr
) = str_index
;
19286 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19287 dwarf_form_name (form
),
19288 bfd_get_filename (abfd
));
19292 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19293 attr
->form
= DW_FORM_GNU_ref_alt
;
19295 /* We have seen instances where the compiler tried to emit a byte
19296 size attribute of -1 which ended up being encoded as an unsigned
19297 0xffffffff. Although 0xffffffff is technically a valid size value,
19298 an object of this size seems pretty unlikely so we can relatively
19299 safely treat these cases as if the size attribute was invalid and
19300 treat them as zero by default. */
19301 if (attr
->name
== DW_AT_byte_size
19302 && form
== DW_FORM_data4
19303 && DW_UNSND (attr
) >= 0xffffffff)
19306 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19307 hex_string (DW_UNSND (attr
)));
19308 DW_UNSND (attr
) = 0;
19314 /* Read an attribute described by an abbreviated attribute. */
19316 static const gdb_byte
*
19317 read_attribute (const struct die_reader_specs
*reader
,
19318 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19319 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19321 attr
->name
= abbrev
->name
;
19322 return read_attribute_value (reader
, attr
, abbrev
->form
,
19323 abbrev
->implicit_const
, info_ptr
,
19327 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19329 static const char *
19330 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19331 LONGEST str_offset
)
19333 return dwarf2_per_objfile
->per_bfd
->str
.read_string
19334 (dwarf2_per_objfile
->objfile
, str_offset
, "DW_FORM_strp");
19337 /* Return pointer to string at .debug_str offset as read from BUF.
19338 BUF is assumed to be in a compilation unit described by CU_HEADER.
19339 Return *BYTES_READ_PTR count of bytes read from BUF. */
19341 static const char *
19342 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19343 const gdb_byte
*buf
,
19344 const struct comp_unit_head
*cu_header
,
19345 unsigned int *bytes_read_ptr
)
19347 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19349 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19355 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19356 const struct comp_unit_head
*cu_header
,
19357 unsigned int *bytes_read_ptr
)
19359 bfd
*abfd
= objfile
->obfd
;
19360 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19362 return per_bfd
->line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19365 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19366 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19367 ADDR_SIZE is the size of addresses from the CU header. */
19370 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19371 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19374 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19375 bfd
*abfd
= objfile
->obfd
;
19376 const gdb_byte
*info_ptr
;
19377 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19379 dwarf2_per_objfile
->per_bfd
->addr
.read (objfile
);
19380 if (dwarf2_per_objfile
->per_bfd
->addr
.buffer
== NULL
)
19381 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19382 objfile_name (objfile
));
19383 if (addr_base_or_zero
+ addr_index
* addr_size
19384 >= dwarf2_per_objfile
->per_bfd
->addr
.size
)
19385 error (_("DW_FORM_addr_index pointing outside of "
19386 ".debug_addr section [in module %s]"),
19387 objfile_name (objfile
));
19388 info_ptr
= (dwarf2_per_objfile
->per_bfd
->addr
.buffer
19389 + addr_base_or_zero
+ addr_index
* addr_size
);
19390 if (addr_size
== 4)
19391 return bfd_get_32 (abfd
, info_ptr
);
19393 return bfd_get_64 (abfd
, info_ptr
);
19396 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19399 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19401 return read_addr_index_1 (cu
->per_objfile
, addr_index
,
19402 cu
->addr_base
, cu
->header
.addr_size
);
19405 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19408 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19409 unsigned int *bytes_read
)
19411 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
19412 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19414 return read_addr_index (cu
, addr_index
);
19420 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
,
19421 dwarf2_per_objfile
*dwarf2_per_objfile
,
19422 unsigned int addr_index
)
19424 struct dwarf2_cu
*cu
= per_cu
->cu
;
19425 gdb::optional
<ULONGEST
> addr_base
;
19428 /* We need addr_base and addr_size.
19429 If we don't have PER_CU->cu, we have to get it.
19430 Nasty, but the alternative is storing the needed info in PER_CU,
19431 which at this point doesn't seem justified: it's not clear how frequently
19432 it would get used and it would increase the size of every PER_CU.
19433 Entry points like dwarf2_per_cu_addr_size do a similar thing
19434 so we're not in uncharted territory here.
19435 Alas we need to be a bit more complicated as addr_base is contained
19438 We don't need to read the entire CU(/TU).
19439 We just need the header and top level die.
19441 IWBN to use the aging mechanism to let us lazily later discard the CU.
19442 For now we skip this optimization. */
19446 addr_base
= cu
->addr_base
;
19447 addr_size
= cu
->header
.addr_size
;
19451 cutu_reader
reader (per_cu
, dwarf2_per_objfile
, NULL
, 0, false);
19452 addr_base
= reader
.cu
->addr_base
;
19453 addr_size
= reader
.cu
->header
.addr_size
;
19456 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19460 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19461 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19464 static const char *
19465 read_str_index (struct dwarf2_cu
*cu
,
19466 struct dwarf2_section_info
*str_section
,
19467 struct dwarf2_section_info
*str_offsets_section
,
19468 ULONGEST str_offsets_base
, ULONGEST str_index
)
19470 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19471 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19472 const char *objf_name
= objfile_name (objfile
);
19473 bfd
*abfd
= objfile
->obfd
;
19474 const gdb_byte
*info_ptr
;
19475 ULONGEST str_offset
;
19476 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19478 str_section
->read (objfile
);
19479 str_offsets_section
->read (objfile
);
19480 if (str_section
->buffer
== NULL
)
19481 error (_("%s used without %s section"
19482 " in CU at offset %s [in module %s]"),
19483 form_name
, str_section
->get_name (),
19484 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19485 if (str_offsets_section
->buffer
== NULL
)
19486 error (_("%s used without %s section"
19487 " in CU at offset %s [in module %s]"),
19488 form_name
, str_section
->get_name (),
19489 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19490 info_ptr
= (str_offsets_section
->buffer
19492 + str_index
* cu
->header
.offset_size
);
19493 if (cu
->header
.offset_size
== 4)
19494 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19496 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19497 if (str_offset
>= str_section
->size
)
19498 error (_("Offset from %s pointing outside of"
19499 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19500 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19501 return (const char *) (str_section
->buffer
+ str_offset
);
19504 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19506 static const char *
19507 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19509 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19510 ? reader
->cu
->header
.addr_size
: 0;
19511 return read_str_index (reader
->cu
,
19512 &reader
->dwo_file
->sections
.str
,
19513 &reader
->dwo_file
->sections
.str_offsets
,
19514 str_offsets_base
, str_index
);
19517 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19519 static const char *
19520 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19522 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19523 const char *objf_name
= objfile_name (objfile
);
19524 static const char form_name
[] = "DW_FORM_GNU_str_index";
19525 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19527 if (!cu
->str_offsets_base
.has_value ())
19528 error (_("%s used in Fission stub without %s"
19529 " in CU at offset 0x%lx [in module %s]"),
19530 form_name
, str_offsets_attr_name
,
19531 (long) cu
->header
.offset_size
, objf_name
);
19533 return read_str_index (cu
,
19534 &cu
->per_objfile
->per_bfd
->str
,
19535 &cu
->per_objfile
->per_bfd
->str_offsets
,
19536 *cu
->str_offsets_base
, str_index
);
19539 /* Return the length of an LEB128 number in BUF. */
19542 leb128_size (const gdb_byte
*buf
)
19544 const gdb_byte
*begin
= buf
;
19550 if ((byte
& 128) == 0)
19551 return buf
- begin
;
19556 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19565 cu
->language
= language_c
;
19568 case DW_LANG_C_plus_plus
:
19569 case DW_LANG_C_plus_plus_11
:
19570 case DW_LANG_C_plus_plus_14
:
19571 cu
->language
= language_cplus
;
19574 cu
->language
= language_d
;
19576 case DW_LANG_Fortran77
:
19577 case DW_LANG_Fortran90
:
19578 case DW_LANG_Fortran95
:
19579 case DW_LANG_Fortran03
:
19580 case DW_LANG_Fortran08
:
19581 cu
->language
= language_fortran
;
19584 cu
->language
= language_go
;
19586 case DW_LANG_Mips_Assembler
:
19587 cu
->language
= language_asm
;
19589 case DW_LANG_Ada83
:
19590 case DW_LANG_Ada95
:
19591 cu
->language
= language_ada
;
19593 case DW_LANG_Modula2
:
19594 cu
->language
= language_m2
;
19596 case DW_LANG_Pascal83
:
19597 cu
->language
= language_pascal
;
19600 cu
->language
= language_objc
;
19603 case DW_LANG_Rust_old
:
19604 cu
->language
= language_rust
;
19606 case DW_LANG_Cobol74
:
19607 case DW_LANG_Cobol85
:
19609 cu
->language
= language_minimal
;
19612 cu
->language_defn
= language_def (cu
->language
);
19615 /* Return the named attribute or NULL if not there. */
19617 static struct attribute
*
19618 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19623 struct attribute
*spec
= NULL
;
19625 for (i
= 0; i
< die
->num_attrs
; ++i
)
19627 if (die
->attrs
[i
].name
== name
)
19628 return &die
->attrs
[i
];
19629 if (die
->attrs
[i
].name
== DW_AT_specification
19630 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19631 spec
= &die
->attrs
[i
];
19637 die
= follow_die_ref (die
, spec
, &cu
);
19643 /* Return the string associated with a string-typed attribute, or NULL if it
19644 is either not found or is of an incorrect type. */
19646 static const char *
19647 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19649 struct attribute
*attr
;
19650 const char *str
= NULL
;
19652 attr
= dwarf2_attr (die
, name
, cu
);
19656 str
= attr
->value_as_string ();
19657 if (str
== nullptr)
19658 complaint (_("string type expected for attribute %s for "
19659 "DIE at %s in module %s"),
19660 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19661 objfile_name (cu
->per_objfile
->objfile
));
19667 /* Return the dwo name or NULL if not present. If present, it is in either
19668 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19669 static const char *
19670 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19672 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19673 if (dwo_name
== nullptr)
19674 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19678 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19679 and holds a non-zero value. This function should only be used for
19680 DW_FORM_flag or DW_FORM_flag_present attributes. */
19683 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19685 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19687 return (attr
&& DW_UNSND (attr
));
19691 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19693 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19694 which value is non-zero. However, we have to be careful with
19695 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19696 (via dwarf2_flag_true_p) follows this attribute. So we may
19697 end up accidently finding a declaration attribute that belongs
19698 to a different DIE referenced by the specification attribute,
19699 even though the given DIE does not have a declaration attribute. */
19700 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19701 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19704 /* Return the die giving the specification for DIE, if there is
19705 one. *SPEC_CU is the CU containing DIE on input, and the CU
19706 containing the return value on output. If there is no
19707 specification, but there is an abstract origin, that is
19710 static struct die_info
*
19711 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19713 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19716 if (spec_attr
== NULL
)
19717 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19719 if (spec_attr
== NULL
)
19722 return follow_die_ref (die
, spec_attr
, spec_cu
);
19725 /* Stub for free_line_header to match void * callback types. */
19728 free_line_header_voidp (void *arg
)
19730 struct line_header
*lh
= (struct line_header
*) arg
;
19735 /* A convenience function to find the proper .debug_line section for a CU. */
19737 static struct dwarf2_section_info
*
19738 get_debug_line_section (struct dwarf2_cu
*cu
)
19740 struct dwarf2_section_info
*section
;
19741 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19743 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19745 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19746 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19747 else if (cu
->per_cu
->is_dwz
)
19749 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
19751 section
= &dwz
->line
;
19754 section
= &dwarf2_per_objfile
->per_bfd
->line
;
19759 /* Read the statement program header starting at OFFSET in
19760 .debug_line, or .debug_line.dwo. Return a pointer
19761 to a struct line_header, allocated using xmalloc.
19762 Returns NULL if there is a problem reading the header, e.g., if it
19763 has a version we don't understand.
19765 NOTE: the strings in the include directory and file name tables of
19766 the returned object point into the dwarf line section buffer,
19767 and must not be freed. */
19769 static line_header_up
19770 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19772 struct dwarf2_section_info
*section
;
19773 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19775 section
= get_debug_line_section (cu
);
19776 section
->read (dwarf2_per_objfile
->objfile
);
19777 if (section
->buffer
== NULL
)
19779 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19780 complaint (_("missing .debug_line.dwo section"));
19782 complaint (_("missing .debug_line section"));
19786 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19787 dwarf2_per_objfile
, section
,
19791 /* Subroutine of dwarf_decode_lines to simplify it.
19792 Return the file name of the psymtab for the given file_entry.
19793 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19794 If space for the result is malloc'd, *NAME_HOLDER will be set.
19795 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19797 static const char *
19798 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19799 const dwarf2_psymtab
*pst
,
19800 const char *comp_dir
,
19801 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19803 const char *include_name
= fe
.name
;
19804 const char *include_name_to_compare
= include_name
;
19805 const char *pst_filename
;
19808 const char *dir_name
= fe
.include_dir (lh
);
19810 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19811 if (!IS_ABSOLUTE_PATH (include_name
)
19812 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19814 /* Avoid creating a duplicate psymtab for PST.
19815 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19816 Before we do the comparison, however, we need to account
19817 for DIR_NAME and COMP_DIR.
19818 First prepend dir_name (if non-NULL). If we still don't
19819 have an absolute path prepend comp_dir (if non-NULL).
19820 However, the directory we record in the include-file's
19821 psymtab does not contain COMP_DIR (to match the
19822 corresponding symtab(s)).
19827 bash$ gcc -g ./hello.c
19828 include_name = "hello.c"
19830 DW_AT_comp_dir = comp_dir = "/tmp"
19831 DW_AT_name = "./hello.c"
19835 if (dir_name
!= NULL
)
19837 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19838 include_name
, (char *) NULL
));
19839 include_name
= name_holder
->get ();
19840 include_name_to_compare
= include_name
;
19842 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19844 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19845 include_name
, (char *) NULL
));
19846 include_name_to_compare
= hold_compare
.get ();
19850 pst_filename
= pst
->filename
;
19851 gdb::unique_xmalloc_ptr
<char> copied_name
;
19852 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19854 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19855 pst_filename
, (char *) NULL
));
19856 pst_filename
= copied_name
.get ();
19859 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19863 return include_name
;
19866 /* State machine to track the state of the line number program. */
19868 class lnp_state_machine
19871 /* Initialize a machine state for the start of a line number
19873 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19874 bool record_lines_p
);
19876 file_entry
*current_file ()
19878 /* lh->file_names is 0-based, but the file name numbers in the
19879 statement program are 1-based. */
19880 return m_line_header
->file_name_at (m_file
);
19883 /* Record the line in the state machine. END_SEQUENCE is true if
19884 we're processing the end of a sequence. */
19885 void record_line (bool end_sequence
);
19887 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19888 nop-out rest of the lines in this sequence. */
19889 void check_line_address (struct dwarf2_cu
*cu
,
19890 const gdb_byte
*line_ptr
,
19891 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19893 void handle_set_discriminator (unsigned int discriminator
)
19895 m_discriminator
= discriminator
;
19896 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19899 /* Handle DW_LNE_set_address. */
19900 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19903 address
+= baseaddr
;
19904 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19907 /* Handle DW_LNS_advance_pc. */
19908 void handle_advance_pc (CORE_ADDR adjust
);
19910 /* Handle a special opcode. */
19911 void handle_special_opcode (unsigned char op_code
);
19913 /* Handle DW_LNS_advance_line. */
19914 void handle_advance_line (int line_delta
)
19916 advance_line (line_delta
);
19919 /* Handle DW_LNS_set_file. */
19920 void handle_set_file (file_name_index file
);
19922 /* Handle DW_LNS_negate_stmt. */
19923 void handle_negate_stmt ()
19925 m_is_stmt
= !m_is_stmt
;
19928 /* Handle DW_LNS_const_add_pc. */
19929 void handle_const_add_pc ();
19931 /* Handle DW_LNS_fixed_advance_pc. */
19932 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19934 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19938 /* Handle DW_LNS_copy. */
19939 void handle_copy ()
19941 record_line (false);
19942 m_discriminator
= 0;
19945 /* Handle DW_LNE_end_sequence. */
19946 void handle_end_sequence ()
19948 m_currently_recording_lines
= true;
19952 /* Advance the line by LINE_DELTA. */
19953 void advance_line (int line_delta
)
19955 m_line
+= line_delta
;
19957 if (line_delta
!= 0)
19958 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19961 struct dwarf2_cu
*m_cu
;
19963 gdbarch
*m_gdbarch
;
19965 /* True if we're recording lines.
19966 Otherwise we're building partial symtabs and are just interested in
19967 finding include files mentioned by the line number program. */
19968 bool m_record_lines_p
;
19970 /* The line number header. */
19971 line_header
*m_line_header
;
19973 /* These are part of the standard DWARF line number state machine,
19974 and initialized according to the DWARF spec. */
19976 unsigned char m_op_index
= 0;
19977 /* The line table index of the current file. */
19978 file_name_index m_file
= 1;
19979 unsigned int m_line
= 1;
19981 /* These are initialized in the constructor. */
19983 CORE_ADDR m_address
;
19985 unsigned int m_discriminator
;
19987 /* Additional bits of state we need to track. */
19989 /* The last file that we called dwarf2_start_subfile for.
19990 This is only used for TLLs. */
19991 unsigned int m_last_file
= 0;
19992 /* The last file a line number was recorded for. */
19993 struct subfile
*m_last_subfile
= NULL
;
19995 /* When true, record the lines we decode. */
19996 bool m_currently_recording_lines
= false;
19998 /* The last line number that was recorded, used to coalesce
19999 consecutive entries for the same line. This can happen, for
20000 example, when discriminators are present. PR 17276. */
20001 unsigned int m_last_line
= 0;
20002 bool m_line_has_non_zero_discriminator
= false;
20006 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20008 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20009 / m_line_header
->maximum_ops_per_instruction
)
20010 * m_line_header
->minimum_instruction_length
);
20011 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20012 m_op_index
= ((m_op_index
+ adjust
)
20013 % m_line_header
->maximum_ops_per_instruction
);
20017 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20019 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20020 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
20021 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
20022 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
20023 / m_line_header
->maximum_ops_per_instruction
)
20024 * m_line_header
->minimum_instruction_length
);
20025 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20026 m_op_index
= ((m_op_index
+ adj_opcode_d
)
20027 % m_line_header
->maximum_ops_per_instruction
);
20029 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
20030 advance_line (line_delta
);
20031 record_line (false);
20032 m_discriminator
= 0;
20036 lnp_state_machine::handle_set_file (file_name_index file
)
20040 const file_entry
*fe
= current_file ();
20042 dwarf2_debug_line_missing_file_complaint ();
20043 else if (m_record_lines_p
)
20045 const char *dir
= fe
->include_dir (m_line_header
);
20047 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20048 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20049 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20054 lnp_state_machine::handle_const_add_pc ()
20057 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20060 = (((m_op_index
+ adjust
)
20061 / m_line_header
->maximum_ops_per_instruction
)
20062 * m_line_header
->minimum_instruction_length
);
20064 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20065 m_op_index
= ((m_op_index
+ adjust
)
20066 % m_line_header
->maximum_ops_per_instruction
);
20069 /* Return non-zero if we should add LINE to the line number table.
20070 LINE is the line to add, LAST_LINE is the last line that was added,
20071 LAST_SUBFILE is the subfile for LAST_LINE.
20072 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20073 had a non-zero discriminator.
20075 We have to be careful in the presence of discriminators.
20076 E.g., for this line:
20078 for (i = 0; i < 100000; i++);
20080 clang can emit four line number entries for that one line,
20081 each with a different discriminator.
20082 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20084 However, we want gdb to coalesce all four entries into one.
20085 Otherwise the user could stepi into the middle of the line and
20086 gdb would get confused about whether the pc really was in the
20087 middle of the line.
20089 Things are further complicated by the fact that two consecutive
20090 line number entries for the same line is a heuristic used by gcc
20091 to denote the end of the prologue. So we can't just discard duplicate
20092 entries, we have to be selective about it. The heuristic we use is
20093 that we only collapse consecutive entries for the same line if at least
20094 one of those entries has a non-zero discriminator. PR 17276.
20096 Note: Addresses in the line number state machine can never go backwards
20097 within one sequence, thus this coalescing is ok. */
20100 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20101 unsigned int line
, unsigned int last_line
,
20102 int line_has_non_zero_discriminator
,
20103 struct subfile
*last_subfile
)
20105 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20107 if (line
!= last_line
)
20109 /* Same line for the same file that we've seen already.
20110 As a last check, for pr 17276, only record the line if the line
20111 has never had a non-zero discriminator. */
20112 if (!line_has_non_zero_discriminator
)
20117 /* Use the CU's builder to record line number LINE beginning at
20118 address ADDRESS in the line table of subfile SUBFILE. */
20121 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20122 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20123 struct dwarf2_cu
*cu
)
20125 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20127 if (dwarf_line_debug
)
20129 fprintf_unfiltered (gdb_stdlog
,
20130 "Recording line %u, file %s, address %s\n",
20131 line
, lbasename (subfile
->name
),
20132 paddress (gdbarch
, address
));
20136 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20139 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20140 Mark the end of a set of line number records.
20141 The arguments are the same as for dwarf_record_line_1.
20142 If SUBFILE is NULL the request is ignored. */
20145 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20146 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20148 if (subfile
== NULL
)
20151 if (dwarf_line_debug
)
20153 fprintf_unfiltered (gdb_stdlog
,
20154 "Finishing current line, file %s, address %s\n",
20155 lbasename (subfile
->name
),
20156 paddress (gdbarch
, address
));
20159 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20163 lnp_state_machine::record_line (bool end_sequence
)
20165 if (dwarf_line_debug
)
20167 fprintf_unfiltered (gdb_stdlog
,
20168 "Processing actual line %u: file %u,"
20169 " address %s, is_stmt %u, discrim %u%s\n",
20171 paddress (m_gdbarch
, m_address
),
20172 m_is_stmt
, m_discriminator
,
20173 (end_sequence
? "\t(end sequence)" : ""));
20176 file_entry
*fe
= current_file ();
20179 dwarf2_debug_line_missing_file_complaint ();
20180 /* For now we ignore lines not starting on an instruction boundary.
20181 But not when processing end_sequence for compatibility with the
20182 previous version of the code. */
20183 else if (m_op_index
== 0 || end_sequence
)
20185 fe
->included_p
= 1;
20186 if (m_record_lines_p
)
20188 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20191 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20192 m_currently_recording_lines
? m_cu
: nullptr);
20197 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20199 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20200 m_line_has_non_zero_discriminator
,
20203 buildsym_compunit
*builder
= m_cu
->get_builder ();
20204 dwarf_record_line_1 (m_gdbarch
,
20205 builder
->get_current_subfile (),
20206 m_line
, m_address
, is_stmt
,
20207 m_currently_recording_lines
? m_cu
: nullptr);
20209 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20210 m_last_line
= m_line
;
20216 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20217 line_header
*lh
, bool record_lines_p
)
20221 m_record_lines_p
= record_lines_p
;
20222 m_line_header
= lh
;
20224 m_currently_recording_lines
= true;
20226 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20227 was a line entry for it so that the backend has a chance to adjust it
20228 and also record it in case it needs it. This is currently used by MIPS
20229 code, cf. `mips_adjust_dwarf2_line'. */
20230 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20231 m_is_stmt
= lh
->default_is_stmt
;
20232 m_discriminator
= 0;
20236 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20237 const gdb_byte
*line_ptr
,
20238 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20240 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20241 the pc range of the CU. However, we restrict the test to only ADDRESS
20242 values of zero to preserve GDB's previous behaviour which is to handle
20243 the specific case of a function being GC'd by the linker. */
20245 if (address
== 0 && address
< unrelocated_lowpc
)
20247 /* This line table is for a function which has been
20248 GCd by the linker. Ignore it. PR gdb/12528 */
20250 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20251 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20253 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20254 line_offset
, objfile_name (objfile
));
20255 m_currently_recording_lines
= false;
20256 /* Note: m_currently_recording_lines is left as false until we see
20257 DW_LNE_end_sequence. */
20261 /* Subroutine of dwarf_decode_lines to simplify it.
20262 Process the line number information in LH.
20263 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20264 program in order to set included_p for every referenced header. */
20267 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20268 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20270 const gdb_byte
*line_ptr
, *extended_end
;
20271 const gdb_byte
*line_end
;
20272 unsigned int bytes_read
, extended_len
;
20273 unsigned char op_code
, extended_op
;
20274 CORE_ADDR baseaddr
;
20275 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20276 bfd
*abfd
= objfile
->obfd
;
20277 struct gdbarch
*gdbarch
= objfile
->arch ();
20278 /* True if we're recording line info (as opposed to building partial
20279 symtabs and just interested in finding include files mentioned by
20280 the line number program). */
20281 bool record_lines_p
= !decode_for_pst_p
;
20283 baseaddr
= objfile
->text_section_offset ();
20285 line_ptr
= lh
->statement_program_start
;
20286 line_end
= lh
->statement_program_end
;
20288 /* Read the statement sequences until there's nothing left. */
20289 while (line_ptr
< line_end
)
20291 /* The DWARF line number program state machine. Reset the state
20292 machine at the start of each sequence. */
20293 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20294 bool end_sequence
= false;
20296 if (record_lines_p
)
20298 /* Start a subfile for the current file of the state
20300 const file_entry
*fe
= state_machine
.current_file ();
20303 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20306 /* Decode the table. */
20307 while (line_ptr
< line_end
&& !end_sequence
)
20309 op_code
= read_1_byte (abfd
, line_ptr
);
20312 if (op_code
>= lh
->opcode_base
)
20314 /* Special opcode. */
20315 state_machine
.handle_special_opcode (op_code
);
20317 else switch (op_code
)
20319 case DW_LNS_extended_op
:
20320 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20322 line_ptr
+= bytes_read
;
20323 extended_end
= line_ptr
+ extended_len
;
20324 extended_op
= read_1_byte (abfd
, line_ptr
);
20326 switch (extended_op
)
20328 case DW_LNE_end_sequence
:
20329 state_machine
.handle_end_sequence ();
20330 end_sequence
= true;
20332 case DW_LNE_set_address
:
20335 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20336 line_ptr
+= bytes_read
;
20338 state_machine
.check_line_address (cu
, line_ptr
,
20339 lowpc
- baseaddr
, address
);
20340 state_machine
.handle_set_address (baseaddr
, address
);
20343 case DW_LNE_define_file
:
20345 const char *cur_file
;
20346 unsigned int mod_time
, length
;
20349 cur_file
= read_direct_string (abfd
, line_ptr
,
20351 line_ptr
+= bytes_read
;
20352 dindex
= (dir_index
)
20353 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20354 line_ptr
+= bytes_read
;
20356 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20357 line_ptr
+= bytes_read
;
20359 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20360 line_ptr
+= bytes_read
;
20361 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20364 case DW_LNE_set_discriminator
:
20366 /* The discriminator is not interesting to the
20367 debugger; just ignore it. We still need to
20368 check its value though:
20369 if there are consecutive entries for the same
20370 (non-prologue) line we want to coalesce them.
20373 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20374 line_ptr
+= bytes_read
;
20376 state_machine
.handle_set_discriminator (discr
);
20380 complaint (_("mangled .debug_line section"));
20383 /* Make sure that we parsed the extended op correctly. If e.g.
20384 we expected a different address size than the producer used,
20385 we may have read the wrong number of bytes. */
20386 if (line_ptr
!= extended_end
)
20388 complaint (_("mangled .debug_line section"));
20393 state_machine
.handle_copy ();
20395 case DW_LNS_advance_pc
:
20398 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20399 line_ptr
+= bytes_read
;
20401 state_machine
.handle_advance_pc (adjust
);
20404 case DW_LNS_advance_line
:
20407 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20408 line_ptr
+= bytes_read
;
20410 state_machine
.handle_advance_line (line_delta
);
20413 case DW_LNS_set_file
:
20415 file_name_index file
20416 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20418 line_ptr
+= bytes_read
;
20420 state_machine
.handle_set_file (file
);
20423 case DW_LNS_set_column
:
20424 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20425 line_ptr
+= bytes_read
;
20427 case DW_LNS_negate_stmt
:
20428 state_machine
.handle_negate_stmt ();
20430 case DW_LNS_set_basic_block
:
20432 /* Add to the address register of the state machine the
20433 address increment value corresponding to special opcode
20434 255. I.e., this value is scaled by the minimum
20435 instruction length since special opcode 255 would have
20436 scaled the increment. */
20437 case DW_LNS_const_add_pc
:
20438 state_machine
.handle_const_add_pc ();
20440 case DW_LNS_fixed_advance_pc
:
20442 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20445 state_machine
.handle_fixed_advance_pc (addr_adj
);
20450 /* Unknown standard opcode, ignore it. */
20453 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20455 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20456 line_ptr
+= bytes_read
;
20463 dwarf2_debug_line_missing_end_sequence_complaint ();
20465 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20466 in which case we still finish recording the last line). */
20467 state_machine
.record_line (true);
20471 /* Decode the Line Number Program (LNP) for the given line_header
20472 structure and CU. The actual information extracted and the type
20473 of structures created from the LNP depends on the value of PST.
20475 1. If PST is NULL, then this procedure uses the data from the program
20476 to create all necessary symbol tables, and their linetables.
20478 2. If PST is not NULL, this procedure reads the program to determine
20479 the list of files included by the unit represented by PST, and
20480 builds all the associated partial symbol tables.
20482 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20483 It is used for relative paths in the line table.
20484 NOTE: When processing partial symtabs (pst != NULL),
20485 comp_dir == pst->dirname.
20487 NOTE: It is important that psymtabs have the same file name (via strcmp)
20488 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20489 symtab we don't use it in the name of the psymtabs we create.
20490 E.g. expand_line_sal requires this when finding psymtabs to expand.
20491 A good testcase for this is mb-inline.exp.
20493 LOWPC is the lowest address in CU (or 0 if not known).
20495 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20496 for its PC<->lines mapping information. Otherwise only the filename
20497 table is read in. */
20500 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20501 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20502 CORE_ADDR lowpc
, int decode_mapping
)
20504 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20505 const int decode_for_pst_p
= (pst
!= NULL
);
20507 if (decode_mapping
)
20508 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20510 if (decode_for_pst_p
)
20512 /* Now that we're done scanning the Line Header Program, we can
20513 create the psymtab of each included file. */
20514 for (auto &file_entry
: lh
->file_names ())
20515 if (file_entry
.included_p
== 1)
20517 gdb::unique_xmalloc_ptr
<char> name_holder
;
20518 const char *include_name
=
20519 psymtab_include_file_name (lh
, file_entry
, pst
,
20520 comp_dir
, &name_holder
);
20521 if (include_name
!= NULL
)
20522 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20527 /* Make sure a symtab is created for every file, even files
20528 which contain only variables (i.e. no code with associated
20530 buildsym_compunit
*builder
= cu
->get_builder ();
20531 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20533 for (auto &fe
: lh
->file_names ())
20535 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20536 if (builder
->get_current_subfile ()->symtab
== NULL
)
20538 builder
->get_current_subfile ()->symtab
20539 = allocate_symtab (cust
,
20540 builder
->get_current_subfile ()->name
);
20542 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20547 /* Start a subfile for DWARF. FILENAME is the name of the file and
20548 DIRNAME the name of the source directory which contains FILENAME
20549 or NULL if not known.
20550 This routine tries to keep line numbers from identical absolute and
20551 relative file names in a common subfile.
20553 Using the `list' example from the GDB testsuite, which resides in
20554 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20555 of /srcdir/list0.c yields the following debugging information for list0.c:
20557 DW_AT_name: /srcdir/list0.c
20558 DW_AT_comp_dir: /compdir
20559 files.files[0].name: list0.h
20560 files.files[0].dir: /srcdir
20561 files.files[1].name: list0.c
20562 files.files[1].dir: /srcdir
20564 The line number information for list0.c has to end up in a single
20565 subfile, so that `break /srcdir/list0.c:1' works as expected.
20566 start_subfile will ensure that this happens provided that we pass the
20567 concatenation of files.files[1].dir and files.files[1].name as the
20571 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20572 const char *dirname
)
20574 gdb::unique_xmalloc_ptr
<char> copy
;
20576 /* In order not to lose the line information directory,
20577 we concatenate it to the filename when it makes sense.
20578 Note that the Dwarf3 standard says (speaking of filenames in line
20579 information): ``The directory index is ignored for file names
20580 that represent full path names''. Thus ignoring dirname in the
20581 `else' branch below isn't an issue. */
20583 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20585 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20586 filename
= copy
.get ();
20589 cu
->get_builder ()->start_subfile (filename
);
20592 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20593 buildsym_compunit constructor. */
20595 struct compunit_symtab
*
20596 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20599 gdb_assert (m_builder
== nullptr);
20601 m_builder
.reset (new struct buildsym_compunit
20602 (this->per_objfile
->objfile
,
20603 name
, comp_dir
, language
, low_pc
));
20605 list_in_scope
= get_builder ()->get_file_symbols ();
20607 get_builder ()->record_debugformat ("DWARF 2");
20608 get_builder ()->record_producer (producer
);
20610 processing_has_namespace_info
= false;
20612 return get_builder ()->get_compunit_symtab ();
20616 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20617 struct dwarf2_cu
*cu
)
20619 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20620 struct comp_unit_head
*cu_header
= &cu
->header
;
20622 /* NOTE drow/2003-01-30: There used to be a comment and some special
20623 code here to turn a symbol with DW_AT_external and a
20624 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20625 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20626 with some versions of binutils) where shared libraries could have
20627 relocations against symbols in their debug information - the
20628 minimal symbol would have the right address, but the debug info
20629 would not. It's no longer necessary, because we will explicitly
20630 apply relocations when we read in the debug information now. */
20632 /* A DW_AT_location attribute with no contents indicates that a
20633 variable has been optimized away. */
20634 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20636 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20640 /* Handle one degenerate form of location expression specially, to
20641 preserve GDB's previous behavior when section offsets are
20642 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20643 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20645 if (attr
->form_is_block ()
20646 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20647 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20648 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20649 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20650 && (DW_BLOCK (attr
)->size
20651 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20653 unsigned int dummy
;
20655 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20656 SET_SYMBOL_VALUE_ADDRESS
20657 (sym
, cu
->header
.read_address (objfile
->obfd
,
20658 DW_BLOCK (attr
)->data
+ 1,
20661 SET_SYMBOL_VALUE_ADDRESS
20662 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20664 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20665 fixup_symbol_section (sym
, objfile
);
20666 SET_SYMBOL_VALUE_ADDRESS
20668 SYMBOL_VALUE_ADDRESS (sym
)
20669 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20673 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20674 expression evaluator, and use LOC_COMPUTED only when necessary
20675 (i.e. when the value of a register or memory location is
20676 referenced, or a thread-local block, etc.). Then again, it might
20677 not be worthwhile. I'm assuming that it isn't unless performance
20678 or memory numbers show me otherwise. */
20680 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20682 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20683 cu
->has_loclist
= true;
20686 /* Given a pointer to a DWARF information entry, figure out if we need
20687 to make a symbol table entry for it, and if so, create a new entry
20688 and return a pointer to it.
20689 If TYPE is NULL, determine symbol type from the die, otherwise
20690 used the passed type.
20691 If SPACE is not NULL, use it to hold the new symbol. If it is
20692 NULL, allocate a new symbol on the objfile's obstack. */
20694 static struct symbol
*
20695 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20696 struct symbol
*space
)
20698 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
20699 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20700 struct gdbarch
*gdbarch
= objfile
->arch ();
20701 struct symbol
*sym
= NULL
;
20703 struct attribute
*attr
= NULL
;
20704 struct attribute
*attr2
= NULL
;
20705 CORE_ADDR baseaddr
;
20706 struct pending
**list_to_add
= NULL
;
20708 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20710 baseaddr
= objfile
->text_section_offset ();
20712 name
= dwarf2_name (die
, cu
);
20715 int suppress_add
= 0;
20720 sym
= new (&objfile
->objfile_obstack
) symbol
;
20721 OBJSTAT (objfile
, n_syms
++);
20723 /* Cache this symbol's name and the name's demangled form (if any). */
20724 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20725 /* Fortran does not have mangling standard and the mangling does differ
20726 between gfortran, iFort etc. */
20727 const char *physname
20728 = (cu
->language
== language_fortran
20729 ? dwarf2_full_name (name
, die
, cu
)
20730 : dwarf2_physname (name
, die
, cu
));
20731 const char *linkagename
= dw2_linkage_name (die
, cu
);
20733 if (linkagename
== nullptr || cu
->language
== language_ada
)
20734 sym
->set_linkage_name (physname
);
20737 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20738 sym
->set_linkage_name (linkagename
);
20741 /* Default assumptions.
20742 Use the passed type or decode it from the die. */
20743 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20744 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20746 SYMBOL_TYPE (sym
) = type
;
20748 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20749 attr
= dwarf2_attr (die
,
20750 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20752 if (attr
!= nullptr)
20754 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20757 attr
= dwarf2_attr (die
,
20758 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20760 if (attr
!= nullptr)
20762 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20763 struct file_entry
*fe
;
20765 if (cu
->line_header
!= NULL
)
20766 fe
= cu
->line_header
->file_name_at (file_index
);
20771 complaint (_("file index out of range"));
20773 symbol_set_symtab (sym
, fe
->symtab
);
20779 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20780 if (attr
!= nullptr)
20784 addr
= attr
->value_as_address ();
20785 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20786 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20788 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20789 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20790 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20791 add_symbol_to_list (sym
, cu
->list_in_scope
);
20793 case DW_TAG_subprogram
:
20794 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20796 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20797 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20798 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20799 || cu
->language
== language_ada
20800 || cu
->language
== language_fortran
)
20802 /* Subprograms marked external are stored as a global symbol.
20803 Ada and Fortran subprograms, whether marked external or
20804 not, are always stored as a global symbol, because we want
20805 to be able to access them globally. For instance, we want
20806 to be able to break on a nested subprogram without having
20807 to specify the context. */
20808 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20812 list_to_add
= cu
->list_in_scope
;
20815 case DW_TAG_inlined_subroutine
:
20816 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20818 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20819 SYMBOL_INLINED (sym
) = 1;
20820 list_to_add
= cu
->list_in_scope
;
20822 case DW_TAG_template_value_param
:
20824 /* Fall through. */
20825 case DW_TAG_constant
:
20826 case DW_TAG_variable
:
20827 case DW_TAG_member
:
20828 /* Compilation with minimal debug info may result in
20829 variables with missing type entries. Change the
20830 misleading `void' type to something sensible. */
20831 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
20832 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20834 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20835 /* In the case of DW_TAG_member, we should only be called for
20836 static const members. */
20837 if (die
->tag
== DW_TAG_member
)
20839 /* dwarf2_add_field uses die_is_declaration,
20840 so we do the same. */
20841 gdb_assert (die_is_declaration (die
, cu
));
20844 if (attr
!= nullptr)
20846 dwarf2_const_value (attr
, sym
, cu
);
20847 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20850 if (attr2
&& (DW_UNSND (attr2
) != 0))
20851 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20853 list_to_add
= cu
->list_in_scope
;
20857 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20858 if (attr
!= nullptr)
20860 var_decode_location (attr
, sym
, cu
);
20861 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20863 /* Fortran explicitly imports any global symbols to the local
20864 scope by DW_TAG_common_block. */
20865 if (cu
->language
== language_fortran
&& die
->parent
20866 && die
->parent
->tag
== DW_TAG_common_block
)
20869 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20870 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20871 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
20873 /* When a static variable is eliminated by the linker,
20874 the corresponding debug information is not stripped
20875 out, but the variable address is set to null;
20876 do not add such variables into symbol table. */
20878 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20880 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20881 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20882 && dwarf2_per_objfile
->per_bfd
->can_copy
)
20884 /* A global static variable might be subject to
20885 copy relocation. We first check for a local
20886 minsym, though, because maybe the symbol was
20887 marked hidden, in which case this would not
20889 bound_minimal_symbol found
20890 = (lookup_minimal_symbol_linkage
20891 (sym
->linkage_name (), objfile
));
20892 if (found
.minsym
!= nullptr)
20893 sym
->maybe_copied
= 1;
20896 /* A variable with DW_AT_external is never static,
20897 but it may be block-scoped. */
20899 = ((cu
->list_in_scope
20900 == cu
->get_builder ()->get_file_symbols ())
20901 ? cu
->get_builder ()->get_global_symbols ()
20902 : cu
->list_in_scope
);
20905 list_to_add
= cu
->list_in_scope
;
20909 /* We do not know the address of this symbol.
20910 If it is an external symbol and we have type information
20911 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20912 The address of the variable will then be determined from
20913 the minimal symbol table whenever the variable is
20915 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20917 /* Fortran explicitly imports any global symbols to the local
20918 scope by DW_TAG_common_block. */
20919 if (cu
->language
== language_fortran
&& die
->parent
20920 && die
->parent
->tag
== DW_TAG_common_block
)
20922 /* SYMBOL_CLASS doesn't matter here because
20923 read_common_block is going to reset it. */
20925 list_to_add
= cu
->list_in_scope
;
20927 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20928 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20930 /* A variable with DW_AT_external is never static, but it
20931 may be block-scoped. */
20933 = ((cu
->list_in_scope
20934 == cu
->get_builder ()->get_file_symbols ())
20935 ? cu
->get_builder ()->get_global_symbols ()
20936 : cu
->list_in_scope
);
20938 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20940 else if (!die_is_declaration (die
, cu
))
20942 /* Use the default LOC_OPTIMIZED_OUT class. */
20943 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20945 list_to_add
= cu
->list_in_scope
;
20949 case DW_TAG_formal_parameter
:
20951 /* If we are inside a function, mark this as an argument. If
20952 not, we might be looking at an argument to an inlined function
20953 when we do not have enough information to show inlined frames;
20954 pretend it's a local variable in that case so that the user can
20956 struct context_stack
*curr
20957 = cu
->get_builder ()->get_current_context_stack ();
20958 if (curr
!= nullptr && curr
->name
!= nullptr)
20959 SYMBOL_IS_ARGUMENT (sym
) = 1;
20960 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20961 if (attr
!= nullptr)
20963 var_decode_location (attr
, sym
, cu
);
20965 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20966 if (attr
!= nullptr)
20968 dwarf2_const_value (attr
, sym
, cu
);
20971 list_to_add
= cu
->list_in_scope
;
20974 case DW_TAG_unspecified_parameters
:
20975 /* From varargs functions; gdb doesn't seem to have any
20976 interest in this information, so just ignore it for now.
20979 case DW_TAG_template_type_param
:
20981 /* Fall through. */
20982 case DW_TAG_class_type
:
20983 case DW_TAG_interface_type
:
20984 case DW_TAG_structure_type
:
20985 case DW_TAG_union_type
:
20986 case DW_TAG_set_type
:
20987 case DW_TAG_enumeration_type
:
20988 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20989 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20992 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20993 really ever be static objects: otherwise, if you try
20994 to, say, break of a class's method and you're in a file
20995 which doesn't mention that class, it won't work unless
20996 the check for all static symbols in lookup_symbol_aux
20997 saves you. See the OtherFileClass tests in
20998 gdb.c++/namespace.exp. */
21002 buildsym_compunit
*builder
= cu
->get_builder ();
21004 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21005 && cu
->language
== language_cplus
21006 ? builder
->get_global_symbols ()
21007 : cu
->list_in_scope
);
21009 /* The semantics of C++ state that "struct foo {
21010 ... }" also defines a typedef for "foo". */
21011 if (cu
->language
== language_cplus
21012 || cu
->language
== language_ada
21013 || cu
->language
== language_d
21014 || cu
->language
== language_rust
)
21016 /* The symbol's name is already allocated along
21017 with this objfile, so we don't need to
21018 duplicate it for the type. */
21019 if (SYMBOL_TYPE (sym
)->name () == 0)
21020 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
21025 case DW_TAG_typedef
:
21026 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21027 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21028 list_to_add
= cu
->list_in_scope
;
21030 case DW_TAG_base_type
:
21031 case DW_TAG_subrange_type
:
21032 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21033 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21034 list_to_add
= cu
->list_in_scope
;
21036 case DW_TAG_enumerator
:
21037 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21038 if (attr
!= nullptr)
21040 dwarf2_const_value (attr
, sym
, cu
);
21043 /* NOTE: carlton/2003-11-10: See comment above in the
21044 DW_TAG_class_type, etc. block. */
21047 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21048 && cu
->language
== language_cplus
21049 ? cu
->get_builder ()->get_global_symbols ()
21050 : cu
->list_in_scope
);
21053 case DW_TAG_imported_declaration
:
21054 case DW_TAG_namespace
:
21055 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21056 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21058 case DW_TAG_module
:
21059 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21060 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21061 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21063 case DW_TAG_common_block
:
21064 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21065 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21066 add_symbol_to_list (sym
, cu
->list_in_scope
);
21069 /* Not a tag we recognize. Hopefully we aren't processing
21070 trash data, but since we must specifically ignore things
21071 we don't recognize, there is nothing else we should do at
21073 complaint (_("unsupported tag: '%s'"),
21074 dwarf_tag_name (die
->tag
));
21080 sym
->hash_next
= objfile
->template_symbols
;
21081 objfile
->template_symbols
= sym
;
21082 list_to_add
= NULL
;
21085 if (list_to_add
!= NULL
)
21086 add_symbol_to_list (sym
, list_to_add
);
21088 /* For the benefit of old versions of GCC, check for anonymous
21089 namespaces based on the demangled name. */
21090 if (!cu
->processing_has_namespace_info
21091 && cu
->language
== language_cplus
)
21092 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21097 /* Given an attr with a DW_FORM_dataN value in host byte order,
21098 zero-extend it as appropriate for the symbol's type. The DWARF
21099 standard (v4) is not entirely clear about the meaning of using
21100 DW_FORM_dataN for a constant with a signed type, where the type is
21101 wider than the data. The conclusion of a discussion on the DWARF
21102 list was that this is unspecified. We choose to always zero-extend
21103 because that is the interpretation long in use by GCC. */
21106 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21107 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21109 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21110 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21111 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21112 LONGEST l
= DW_UNSND (attr
);
21114 if (bits
< sizeof (*value
) * 8)
21116 l
&= ((LONGEST
) 1 << bits
) - 1;
21119 else if (bits
== sizeof (*value
) * 8)
21123 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21124 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21131 /* Read a constant value from an attribute. Either set *VALUE, or if
21132 the value does not fit in *VALUE, set *BYTES - either already
21133 allocated on the objfile obstack, or newly allocated on OBSTACK,
21134 or, set *BATON, if we translated the constant to a location
21138 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21139 const char *name
, struct obstack
*obstack
,
21140 struct dwarf2_cu
*cu
,
21141 LONGEST
*value
, const gdb_byte
**bytes
,
21142 struct dwarf2_locexpr_baton
**baton
)
21144 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21145 struct objfile
*objfile
= per_objfile
->objfile
;
21146 struct comp_unit_head
*cu_header
= &cu
->header
;
21147 struct dwarf_block
*blk
;
21148 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21149 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21155 switch (attr
->form
)
21158 case DW_FORM_addrx
:
21159 case DW_FORM_GNU_addr_index
:
21163 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21164 dwarf2_const_value_length_mismatch_complaint (name
,
21165 cu_header
->addr_size
,
21166 TYPE_LENGTH (type
));
21167 /* Symbols of this form are reasonably rare, so we just
21168 piggyback on the existing location code rather than writing
21169 a new implementation of symbol_computed_ops. */
21170 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21171 (*baton
)->per_objfile
= per_objfile
;
21172 (*baton
)->per_cu
= cu
->per_cu
;
21173 gdb_assert ((*baton
)->per_cu
);
21175 (*baton
)->size
= 2 + cu_header
->addr_size
;
21176 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21177 (*baton
)->data
= data
;
21179 data
[0] = DW_OP_addr
;
21180 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21181 byte_order
, DW_ADDR (attr
));
21182 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21185 case DW_FORM_string
:
21188 case DW_FORM_GNU_str_index
:
21189 case DW_FORM_GNU_strp_alt
:
21190 /* DW_STRING is already allocated on the objfile obstack, point
21192 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21194 case DW_FORM_block1
:
21195 case DW_FORM_block2
:
21196 case DW_FORM_block4
:
21197 case DW_FORM_block
:
21198 case DW_FORM_exprloc
:
21199 case DW_FORM_data16
:
21200 blk
= DW_BLOCK (attr
);
21201 if (TYPE_LENGTH (type
) != blk
->size
)
21202 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21203 TYPE_LENGTH (type
));
21204 *bytes
= blk
->data
;
21207 /* The DW_AT_const_value attributes are supposed to carry the
21208 symbol's value "represented as it would be on the target
21209 architecture." By the time we get here, it's already been
21210 converted to host endianness, so we just need to sign- or
21211 zero-extend it as appropriate. */
21212 case DW_FORM_data1
:
21213 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21215 case DW_FORM_data2
:
21216 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21218 case DW_FORM_data4
:
21219 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21221 case DW_FORM_data8
:
21222 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21225 case DW_FORM_sdata
:
21226 case DW_FORM_implicit_const
:
21227 *value
= DW_SND (attr
);
21230 case DW_FORM_udata
:
21231 *value
= DW_UNSND (attr
);
21235 complaint (_("unsupported const value attribute form: '%s'"),
21236 dwarf_form_name (attr
->form
));
21243 /* Copy constant value from an attribute to a symbol. */
21246 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21247 struct dwarf2_cu
*cu
)
21249 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21251 const gdb_byte
*bytes
;
21252 struct dwarf2_locexpr_baton
*baton
;
21254 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21255 sym
->print_name (),
21256 &objfile
->objfile_obstack
, cu
,
21257 &value
, &bytes
, &baton
);
21261 SYMBOL_LOCATION_BATON (sym
) = baton
;
21262 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21264 else if (bytes
!= NULL
)
21266 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21267 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21271 SYMBOL_VALUE (sym
) = value
;
21272 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21276 /* Return the type of the die in question using its DW_AT_type attribute. */
21278 static struct type
*
21279 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21281 struct attribute
*type_attr
;
21283 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21286 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21287 /* A missing DW_AT_type represents a void type. */
21288 return objfile_type (objfile
)->builtin_void
;
21291 return lookup_die_type (die
, type_attr
, cu
);
21294 /* True iff CU's producer generates GNAT Ada auxiliary information
21295 that allows to find parallel types through that information instead
21296 of having to do expensive parallel lookups by type name. */
21299 need_gnat_info (struct dwarf2_cu
*cu
)
21301 /* Assume that the Ada compiler was GNAT, which always produces
21302 the auxiliary information. */
21303 return (cu
->language
== language_ada
);
21306 /* Return the auxiliary type of the die in question using its
21307 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21308 attribute is not present. */
21310 static struct type
*
21311 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21313 struct attribute
*type_attr
;
21315 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21319 return lookup_die_type (die
, type_attr
, cu
);
21322 /* If DIE has a descriptive_type attribute, then set the TYPE's
21323 descriptive type accordingly. */
21326 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21327 struct dwarf2_cu
*cu
)
21329 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21331 if (descriptive_type
)
21333 ALLOCATE_GNAT_AUX_TYPE (type
);
21334 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21338 /* Return the containing type of the die in question using its
21339 DW_AT_containing_type attribute. */
21341 static struct type
*
21342 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21344 struct attribute
*type_attr
;
21345 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21347 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21349 error (_("Dwarf Error: Problem turning containing type into gdb type "
21350 "[in module %s]"), objfile_name (objfile
));
21352 return lookup_die_type (die
, type_attr
, cu
);
21355 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21357 static struct type
*
21358 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21360 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21361 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21364 std::string message
21365 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21366 objfile_name (objfile
),
21367 sect_offset_str (cu
->header
.sect_off
),
21368 sect_offset_str (die
->sect_off
));
21369 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21371 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21374 /* Look up the type of DIE in CU using its type attribute ATTR.
21375 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21376 DW_AT_containing_type.
21377 If there is no type substitute an error marker. */
21379 static struct type
*
21380 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21381 struct dwarf2_cu
*cu
)
21383 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21384 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21385 struct type
*this_type
;
21387 gdb_assert (attr
->name
== DW_AT_type
21388 || attr
->name
== DW_AT_GNAT_descriptive_type
21389 || attr
->name
== DW_AT_containing_type
);
21391 /* First see if we have it cached. */
21393 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21395 struct dwarf2_per_cu_data
*per_cu
;
21396 sect_offset sect_off
= attr
->get_ref_die_offset ();
21398 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21399 dwarf2_per_objfile
);
21400 this_type
= get_die_type_at_offset (sect_off
, per_cu
, dwarf2_per_objfile
);
21402 else if (attr
->form_is_ref ())
21404 sect_offset sect_off
= attr
->get_ref_die_offset ();
21406 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
,
21407 dwarf2_per_objfile
);
21409 else if (attr
->form
== DW_FORM_ref_sig8
)
21411 ULONGEST signature
= DW_SIGNATURE (attr
);
21413 return get_signatured_type (die
, signature
, cu
);
21417 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21418 " at %s [in module %s]"),
21419 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21420 objfile_name (objfile
));
21421 return build_error_marker_type (cu
, die
);
21424 /* If not cached we need to read it in. */
21426 if (this_type
== NULL
)
21428 struct die_info
*type_die
= NULL
;
21429 struct dwarf2_cu
*type_cu
= cu
;
21431 if (attr
->form_is_ref ())
21432 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21433 if (type_die
== NULL
)
21434 return build_error_marker_type (cu
, die
);
21435 /* If we find the type now, it's probably because the type came
21436 from an inter-CU reference and the type's CU got expanded before
21438 this_type
= read_type_die (type_die
, type_cu
);
21441 /* If we still don't have a type use an error marker. */
21443 if (this_type
== NULL
)
21444 return build_error_marker_type (cu
, die
);
21449 /* Return the type in DIE, CU.
21450 Returns NULL for invalid types.
21452 This first does a lookup in die_type_hash,
21453 and only reads the die in if necessary.
21455 NOTE: This can be called when reading in partial or full symbols. */
21457 static struct type
*
21458 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21460 struct type
*this_type
;
21462 this_type
= get_die_type (die
, cu
);
21466 return read_type_die_1 (die
, cu
);
21469 /* Read the type in DIE, CU.
21470 Returns NULL for invalid types. */
21472 static struct type
*
21473 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21475 struct type
*this_type
= NULL
;
21479 case DW_TAG_class_type
:
21480 case DW_TAG_interface_type
:
21481 case DW_TAG_structure_type
:
21482 case DW_TAG_union_type
:
21483 this_type
= read_structure_type (die
, cu
);
21485 case DW_TAG_enumeration_type
:
21486 this_type
= read_enumeration_type (die
, cu
);
21488 case DW_TAG_subprogram
:
21489 case DW_TAG_subroutine_type
:
21490 case DW_TAG_inlined_subroutine
:
21491 this_type
= read_subroutine_type (die
, cu
);
21493 case DW_TAG_array_type
:
21494 this_type
= read_array_type (die
, cu
);
21496 case DW_TAG_set_type
:
21497 this_type
= read_set_type (die
, cu
);
21499 case DW_TAG_pointer_type
:
21500 this_type
= read_tag_pointer_type (die
, cu
);
21502 case DW_TAG_ptr_to_member_type
:
21503 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21505 case DW_TAG_reference_type
:
21506 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21508 case DW_TAG_rvalue_reference_type
:
21509 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21511 case DW_TAG_const_type
:
21512 this_type
= read_tag_const_type (die
, cu
);
21514 case DW_TAG_volatile_type
:
21515 this_type
= read_tag_volatile_type (die
, cu
);
21517 case DW_TAG_restrict_type
:
21518 this_type
= read_tag_restrict_type (die
, cu
);
21520 case DW_TAG_string_type
:
21521 this_type
= read_tag_string_type (die
, cu
);
21523 case DW_TAG_typedef
:
21524 this_type
= read_typedef (die
, cu
);
21526 case DW_TAG_subrange_type
:
21527 this_type
= read_subrange_type (die
, cu
);
21529 case DW_TAG_base_type
:
21530 this_type
= read_base_type (die
, cu
);
21532 case DW_TAG_unspecified_type
:
21533 this_type
= read_unspecified_type (die
, cu
);
21535 case DW_TAG_namespace
:
21536 this_type
= read_namespace_type (die
, cu
);
21538 case DW_TAG_module
:
21539 this_type
= read_module_type (die
, cu
);
21541 case DW_TAG_atomic_type
:
21542 this_type
= read_tag_atomic_type (die
, cu
);
21545 complaint (_("unexpected tag in read_type_die: '%s'"),
21546 dwarf_tag_name (die
->tag
));
21553 /* See if we can figure out if the class lives in a namespace. We do
21554 this by looking for a member function; its demangled name will
21555 contain namespace info, if there is any.
21556 Return the computed name or NULL.
21557 Space for the result is allocated on the objfile's obstack.
21558 This is the full-die version of guess_partial_die_structure_name.
21559 In this case we know DIE has no useful parent. */
21561 static const char *
21562 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21564 struct die_info
*spec_die
;
21565 struct dwarf2_cu
*spec_cu
;
21566 struct die_info
*child
;
21567 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21570 spec_die
= die_specification (die
, &spec_cu
);
21571 if (spec_die
!= NULL
)
21577 for (child
= die
->child
;
21579 child
= child
->sibling
)
21581 if (child
->tag
== DW_TAG_subprogram
)
21583 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21585 if (linkage_name
!= NULL
)
21587 gdb::unique_xmalloc_ptr
<char> actual_name
21588 (language_class_name_from_physname (cu
->language_defn
,
21590 const char *name
= NULL
;
21592 if (actual_name
!= NULL
)
21594 const char *die_name
= dwarf2_name (die
, cu
);
21596 if (die_name
!= NULL
21597 && strcmp (die_name
, actual_name
.get ()) != 0)
21599 /* Strip off the class name from the full name.
21600 We want the prefix. */
21601 int die_name_len
= strlen (die_name
);
21602 int actual_name_len
= strlen (actual_name
.get ());
21603 const char *ptr
= actual_name
.get ();
21605 /* Test for '::' as a sanity check. */
21606 if (actual_name_len
> die_name_len
+ 2
21607 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21608 name
= obstack_strndup (
21609 &objfile
->per_bfd
->storage_obstack
,
21610 ptr
, actual_name_len
- die_name_len
- 2);
21621 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21622 prefix part in such case. See
21623 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21625 static const char *
21626 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21628 struct attribute
*attr
;
21631 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21632 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21635 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21638 attr
= dw2_linkage_name_attr (die
, cu
);
21639 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21642 /* dwarf2_name had to be already called. */
21643 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21645 /* Strip the base name, keep any leading namespaces/classes. */
21646 base
= strrchr (DW_STRING (attr
), ':');
21647 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21650 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21651 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21653 &base
[-1] - DW_STRING (attr
));
21656 /* Return the name of the namespace/class that DIE is defined within,
21657 or "" if we can't tell. The caller should not xfree the result.
21659 For example, if we're within the method foo() in the following
21669 then determine_prefix on foo's die will return "N::C". */
21671 static const char *
21672 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21674 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21675 struct die_info
*parent
, *spec_die
;
21676 struct dwarf2_cu
*spec_cu
;
21677 struct type
*parent_type
;
21678 const char *retval
;
21680 if (cu
->language
!= language_cplus
21681 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21682 && cu
->language
!= language_rust
)
21685 retval
= anonymous_struct_prefix (die
, cu
);
21689 /* We have to be careful in the presence of DW_AT_specification.
21690 For example, with GCC 3.4, given the code
21694 // Definition of N::foo.
21698 then we'll have a tree of DIEs like this:
21700 1: DW_TAG_compile_unit
21701 2: DW_TAG_namespace // N
21702 3: DW_TAG_subprogram // declaration of N::foo
21703 4: DW_TAG_subprogram // definition of N::foo
21704 DW_AT_specification // refers to die #3
21706 Thus, when processing die #4, we have to pretend that we're in
21707 the context of its DW_AT_specification, namely the contex of die
21710 spec_die
= die_specification (die
, &spec_cu
);
21711 if (spec_die
== NULL
)
21712 parent
= die
->parent
;
21715 parent
= spec_die
->parent
;
21719 if (parent
== NULL
)
21721 else if (parent
->building_fullname
)
21724 const char *parent_name
;
21726 /* It has been seen on RealView 2.2 built binaries,
21727 DW_TAG_template_type_param types actually _defined_ as
21728 children of the parent class:
21731 template class <class Enum> Class{};
21732 Class<enum E> class_e;
21734 1: DW_TAG_class_type (Class)
21735 2: DW_TAG_enumeration_type (E)
21736 3: DW_TAG_enumerator (enum1:0)
21737 3: DW_TAG_enumerator (enum2:1)
21739 2: DW_TAG_template_type_param
21740 DW_AT_type DW_FORM_ref_udata (E)
21742 Besides being broken debug info, it can put GDB into an
21743 infinite loop. Consider:
21745 When we're building the full name for Class<E>, we'll start
21746 at Class, and go look over its template type parameters,
21747 finding E. We'll then try to build the full name of E, and
21748 reach here. We're now trying to build the full name of E,
21749 and look over the parent DIE for containing scope. In the
21750 broken case, if we followed the parent DIE of E, we'd again
21751 find Class, and once again go look at its template type
21752 arguments, etc., etc. Simply don't consider such parent die
21753 as source-level parent of this die (it can't be, the language
21754 doesn't allow it), and break the loop here. */
21755 name
= dwarf2_name (die
, cu
);
21756 parent_name
= dwarf2_name (parent
, cu
);
21757 complaint (_("template param type '%s' defined within parent '%s'"),
21758 name
? name
: "<unknown>",
21759 parent_name
? parent_name
: "<unknown>");
21763 switch (parent
->tag
)
21765 case DW_TAG_namespace
:
21766 parent_type
= read_type_die (parent
, cu
);
21767 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21768 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21769 Work around this problem here. */
21770 if (cu
->language
== language_cplus
21771 && strcmp (parent_type
->name (), "::") == 0)
21773 /* We give a name to even anonymous namespaces. */
21774 return parent_type
->name ();
21775 case DW_TAG_class_type
:
21776 case DW_TAG_interface_type
:
21777 case DW_TAG_structure_type
:
21778 case DW_TAG_union_type
:
21779 case DW_TAG_module
:
21780 parent_type
= read_type_die (parent
, cu
);
21781 if (parent_type
->name () != NULL
)
21782 return parent_type
->name ();
21784 /* An anonymous structure is only allowed non-static data
21785 members; no typedefs, no member functions, et cetera.
21786 So it does not need a prefix. */
21788 case DW_TAG_compile_unit
:
21789 case DW_TAG_partial_unit
:
21790 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21791 if (cu
->language
== language_cplus
21792 && !dwarf2_per_objfile
->per_bfd
->types
.empty ()
21793 && die
->child
!= NULL
21794 && (die
->tag
== DW_TAG_class_type
21795 || die
->tag
== DW_TAG_structure_type
21796 || die
->tag
== DW_TAG_union_type
))
21798 const char *name
= guess_full_die_structure_name (die
, cu
);
21803 case DW_TAG_subprogram
:
21804 /* Nested subroutines in Fortran get a prefix with the name
21805 of the parent's subroutine. */
21806 if (cu
->language
== language_fortran
)
21808 if ((die
->tag
== DW_TAG_subprogram
)
21809 && (dwarf2_name (parent
, cu
) != NULL
))
21810 return dwarf2_name (parent
, cu
);
21812 return determine_prefix (parent
, cu
);
21813 case DW_TAG_enumeration_type
:
21814 parent_type
= read_type_die (parent
, cu
);
21815 if (TYPE_DECLARED_CLASS (parent_type
))
21817 if (parent_type
->name () != NULL
)
21818 return parent_type
->name ();
21821 /* Fall through. */
21823 return determine_prefix (parent
, cu
);
21827 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21828 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21829 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21830 an obconcat, otherwise allocate storage for the result. The CU argument is
21831 used to determine the language and hence, the appropriate separator. */
21833 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21836 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21837 int physname
, struct dwarf2_cu
*cu
)
21839 const char *lead
= "";
21842 if (suffix
== NULL
|| suffix
[0] == '\0'
21843 || prefix
== NULL
|| prefix
[0] == '\0')
21845 else if (cu
->language
== language_d
)
21847 /* For D, the 'main' function could be defined in any module, but it
21848 should never be prefixed. */
21849 if (strcmp (suffix
, "D main") == 0)
21857 else if (cu
->language
== language_fortran
&& physname
)
21859 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21860 DW_AT_MIPS_linkage_name is preferred and used instead. */
21868 if (prefix
== NULL
)
21870 if (suffix
== NULL
)
21877 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21879 strcpy (retval
, lead
);
21880 strcat (retval
, prefix
);
21881 strcat (retval
, sep
);
21882 strcat (retval
, suffix
);
21887 /* We have an obstack. */
21888 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21892 /* Get name of a die, return NULL if not found. */
21894 static const char *
21895 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21896 struct objfile
*objfile
)
21898 if (name
&& cu
->language
== language_cplus
)
21900 gdb::unique_xmalloc_ptr
<char> canon_name
21901 = cp_canonicalize_string (name
);
21903 if (canon_name
!= nullptr)
21904 name
= objfile
->intern (canon_name
.get ());
21910 /* Get name of a die, return NULL if not found.
21911 Anonymous namespaces are converted to their magic string. */
21913 static const char *
21914 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21916 struct attribute
*attr
;
21917 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21919 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21920 if ((!attr
|| !DW_STRING (attr
))
21921 && die
->tag
!= DW_TAG_namespace
21922 && die
->tag
!= DW_TAG_class_type
21923 && die
->tag
!= DW_TAG_interface_type
21924 && die
->tag
!= DW_TAG_structure_type
21925 && die
->tag
!= DW_TAG_union_type
)
21930 case DW_TAG_compile_unit
:
21931 case DW_TAG_partial_unit
:
21932 /* Compilation units have a DW_AT_name that is a filename, not
21933 a source language identifier. */
21934 case DW_TAG_enumeration_type
:
21935 case DW_TAG_enumerator
:
21936 /* These tags always have simple identifiers already; no need
21937 to canonicalize them. */
21938 return DW_STRING (attr
);
21940 case DW_TAG_namespace
:
21941 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21942 return DW_STRING (attr
);
21943 return CP_ANONYMOUS_NAMESPACE_STR
;
21945 case DW_TAG_class_type
:
21946 case DW_TAG_interface_type
:
21947 case DW_TAG_structure_type
:
21948 case DW_TAG_union_type
:
21949 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21950 structures or unions. These were of the form "._%d" in GCC 4.1,
21951 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21952 and GCC 4.4. We work around this problem by ignoring these. */
21953 if (attr
&& DW_STRING (attr
)
21954 && (startswith (DW_STRING (attr
), "._")
21955 || startswith (DW_STRING (attr
), "<anonymous")))
21958 /* GCC might emit a nameless typedef that has a linkage name. See
21959 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21960 if (!attr
|| DW_STRING (attr
) == NULL
)
21962 attr
= dw2_linkage_name_attr (die
, cu
);
21963 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21966 /* Avoid demangling DW_STRING (attr) the second time on a second
21967 call for the same DIE. */
21968 if (!DW_STRING_IS_CANONICAL (attr
))
21970 gdb::unique_xmalloc_ptr
<char> demangled
21971 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21972 if (demangled
== nullptr)
21975 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21976 DW_STRING_IS_CANONICAL (attr
) = 1;
21979 /* Strip any leading namespaces/classes, keep only the base name.
21980 DW_AT_name for named DIEs does not contain the prefixes. */
21981 const char *base
= strrchr (DW_STRING (attr
), ':');
21982 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21985 return DW_STRING (attr
);
21993 if (!DW_STRING_IS_CANONICAL (attr
))
21995 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21997 DW_STRING_IS_CANONICAL (attr
) = 1;
21999 return DW_STRING (attr
);
22002 /* Return the die that this die in an extension of, or NULL if there
22003 is none. *EXT_CU is the CU containing DIE on input, and the CU
22004 containing the return value on output. */
22006 static struct die_info
*
22007 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22009 struct attribute
*attr
;
22011 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22015 return follow_die_ref (die
, attr
, ext_cu
);
22019 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22023 print_spaces (indent
, f
);
22024 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22025 dwarf_tag_name (die
->tag
), die
->abbrev
,
22026 sect_offset_str (die
->sect_off
));
22028 if (die
->parent
!= NULL
)
22030 print_spaces (indent
, f
);
22031 fprintf_unfiltered (f
, " parent at offset: %s\n",
22032 sect_offset_str (die
->parent
->sect_off
));
22035 print_spaces (indent
, f
);
22036 fprintf_unfiltered (f
, " has children: %s\n",
22037 dwarf_bool_name (die
->child
!= NULL
));
22039 print_spaces (indent
, f
);
22040 fprintf_unfiltered (f
, " attributes:\n");
22042 for (i
= 0; i
< die
->num_attrs
; ++i
)
22044 print_spaces (indent
, f
);
22045 fprintf_unfiltered (f
, " %s (%s) ",
22046 dwarf_attr_name (die
->attrs
[i
].name
),
22047 dwarf_form_name (die
->attrs
[i
].form
));
22049 switch (die
->attrs
[i
].form
)
22052 case DW_FORM_addrx
:
22053 case DW_FORM_GNU_addr_index
:
22054 fprintf_unfiltered (f
, "address: ");
22055 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22057 case DW_FORM_block2
:
22058 case DW_FORM_block4
:
22059 case DW_FORM_block
:
22060 case DW_FORM_block1
:
22061 fprintf_unfiltered (f
, "block: size %s",
22062 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22064 case DW_FORM_exprloc
:
22065 fprintf_unfiltered (f
, "expression: size %s",
22066 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22068 case DW_FORM_data16
:
22069 fprintf_unfiltered (f
, "constant of 16 bytes");
22071 case DW_FORM_ref_addr
:
22072 fprintf_unfiltered (f
, "ref address: ");
22073 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22075 case DW_FORM_GNU_ref_alt
:
22076 fprintf_unfiltered (f
, "alt ref address: ");
22077 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22083 case DW_FORM_ref_udata
:
22084 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22085 (long) (DW_UNSND (&die
->attrs
[i
])));
22087 case DW_FORM_data1
:
22088 case DW_FORM_data2
:
22089 case DW_FORM_data4
:
22090 case DW_FORM_data8
:
22091 case DW_FORM_udata
:
22092 case DW_FORM_sdata
:
22093 fprintf_unfiltered (f
, "constant: %s",
22094 pulongest (DW_UNSND (&die
->attrs
[i
])));
22096 case DW_FORM_sec_offset
:
22097 fprintf_unfiltered (f
, "section offset: %s",
22098 pulongest (DW_UNSND (&die
->attrs
[i
])));
22100 case DW_FORM_ref_sig8
:
22101 fprintf_unfiltered (f
, "signature: %s",
22102 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22104 case DW_FORM_string
:
22106 case DW_FORM_line_strp
:
22108 case DW_FORM_GNU_str_index
:
22109 case DW_FORM_GNU_strp_alt
:
22110 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22111 DW_STRING (&die
->attrs
[i
])
22112 ? DW_STRING (&die
->attrs
[i
]) : "",
22113 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22116 if (DW_UNSND (&die
->attrs
[i
]))
22117 fprintf_unfiltered (f
, "flag: TRUE");
22119 fprintf_unfiltered (f
, "flag: FALSE");
22121 case DW_FORM_flag_present
:
22122 fprintf_unfiltered (f
, "flag: TRUE");
22124 case DW_FORM_indirect
:
22125 /* The reader will have reduced the indirect form to
22126 the "base form" so this form should not occur. */
22127 fprintf_unfiltered (f
,
22128 "unexpected attribute form: DW_FORM_indirect");
22130 case DW_FORM_implicit_const
:
22131 fprintf_unfiltered (f
, "constant: %s",
22132 plongest (DW_SND (&die
->attrs
[i
])));
22135 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22136 die
->attrs
[i
].form
);
22139 fprintf_unfiltered (f
, "\n");
22144 dump_die_for_error (struct die_info
*die
)
22146 dump_die_shallow (gdb_stderr
, 0, die
);
22150 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22152 int indent
= level
* 4;
22154 gdb_assert (die
!= NULL
);
22156 if (level
>= max_level
)
22159 dump_die_shallow (f
, indent
, die
);
22161 if (die
->child
!= NULL
)
22163 print_spaces (indent
, f
);
22164 fprintf_unfiltered (f
, " Children:");
22165 if (level
+ 1 < max_level
)
22167 fprintf_unfiltered (f
, "\n");
22168 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22172 fprintf_unfiltered (f
,
22173 " [not printed, max nesting level reached]\n");
22177 if (die
->sibling
!= NULL
&& level
> 0)
22179 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22183 /* This is called from the pdie macro in gdbinit.in.
22184 It's not static so gcc will keep a copy callable from gdb. */
22187 dump_die (struct die_info
*die
, int max_level
)
22189 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22193 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22197 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22198 to_underlying (die
->sect_off
),
22204 /* Follow reference or signature attribute ATTR of SRC_DIE.
22205 On entry *REF_CU is the CU of SRC_DIE.
22206 On exit *REF_CU is the CU of the result. */
22208 static struct die_info
*
22209 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22210 struct dwarf2_cu
**ref_cu
)
22212 struct die_info
*die
;
22214 if (attr
->form_is_ref ())
22215 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22216 else if (attr
->form
== DW_FORM_ref_sig8
)
22217 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22220 dump_die_for_error (src_die
);
22221 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22222 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22228 /* Follow reference OFFSET.
22229 On entry *REF_CU is the CU of the source die referencing OFFSET.
22230 On exit *REF_CU is the CU of the result.
22231 Returns NULL if OFFSET is invalid. */
22233 static struct die_info
*
22234 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22235 struct dwarf2_cu
**ref_cu
)
22237 struct die_info temp_die
;
22238 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22239 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22241 gdb_assert (cu
->per_cu
!= NULL
);
22245 if (cu
->per_cu
->is_debug_types
)
22247 /* .debug_types CUs cannot reference anything outside their CU.
22248 If they need to, they have to reference a signatured type via
22249 DW_FORM_ref_sig8. */
22250 if (!cu
->header
.offset_in_cu_p (sect_off
))
22253 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22254 || !cu
->header
.offset_in_cu_p (sect_off
))
22256 struct dwarf2_per_cu_data
*per_cu
;
22258 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22259 dwarf2_per_objfile
);
22261 /* If necessary, add it to the queue and load its DIEs. */
22262 if (maybe_queue_comp_unit (cu
, per_cu
, dwarf2_per_objfile
, cu
->language
))
22263 load_full_comp_unit (per_cu
, dwarf2_per_objfile
, false, cu
->language
);
22265 target_cu
= per_cu
->cu
;
22267 else if (cu
->dies
== NULL
)
22269 /* We're loading full DIEs during partial symbol reading. */
22270 gdb_assert (dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
);
22271 load_full_comp_unit (cu
->per_cu
, dwarf2_per_objfile
, false,
22275 *ref_cu
= target_cu
;
22276 temp_die
.sect_off
= sect_off
;
22278 if (target_cu
!= cu
)
22279 target_cu
->ancestor
= cu
;
22281 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22283 to_underlying (sect_off
));
22286 /* Follow reference attribute ATTR of SRC_DIE.
22287 On entry *REF_CU is the CU of SRC_DIE.
22288 On exit *REF_CU is the CU of the result. */
22290 static struct die_info
*
22291 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22292 struct dwarf2_cu
**ref_cu
)
22294 sect_offset sect_off
= attr
->get_ref_die_offset ();
22295 struct dwarf2_cu
*cu
= *ref_cu
;
22296 struct die_info
*die
;
22298 die
= follow_die_offset (sect_off
,
22299 (attr
->form
== DW_FORM_GNU_ref_alt
22300 || cu
->per_cu
->is_dwz
),
22303 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22304 "at %s [in module %s]"),
22305 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22306 objfile_name (cu
->per_objfile
->objfile
));
22313 struct dwarf2_locexpr_baton
22314 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22315 dwarf2_per_cu_data
*per_cu
,
22316 dwarf2_per_objfile
*dwarf2_per_objfile
,
22317 CORE_ADDR (*get_frame_pc
) (void *baton
),
22318 void *baton
, bool resolve_abstract_p
)
22320 struct dwarf2_cu
*cu
;
22321 struct die_info
*die
;
22322 struct attribute
*attr
;
22323 struct dwarf2_locexpr_baton retval
;
22324 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22326 if (per_cu
->cu
== NULL
)
22327 load_cu (per_cu
, dwarf2_per_objfile
, false);
22331 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22332 Instead just throw an error, not much else we can do. */
22333 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22334 sect_offset_str (sect_off
), objfile_name (objfile
));
22337 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22339 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22340 sect_offset_str (sect_off
), objfile_name (objfile
));
22342 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22343 if (!attr
&& resolve_abstract_p
22344 && (dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.find (die
->sect_off
)
22345 != dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.end ()))
22347 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22348 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22349 struct gdbarch
*gdbarch
= objfile
->arch ();
22351 for (const auto &cand_off
22352 : dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
[die
->sect_off
])
22354 struct dwarf2_cu
*cand_cu
= cu
;
22355 struct die_info
*cand
22356 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22359 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22362 CORE_ADDR pc_low
, pc_high
;
22363 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22364 if (pc_low
== ((CORE_ADDR
) -1))
22366 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22367 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22368 if (!(pc_low
<= pc
&& pc
< pc_high
))
22372 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22379 /* DWARF: "If there is no such attribute, then there is no effect.".
22380 DATA is ignored if SIZE is 0. */
22382 retval
.data
= NULL
;
22385 else if (attr
->form_is_section_offset ())
22387 struct dwarf2_loclist_baton loclist_baton
;
22388 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22391 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22393 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22395 retval
.size
= size
;
22399 if (!attr
->form_is_block ())
22400 error (_("Dwarf Error: DIE at %s referenced in module %s "
22401 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22402 sect_offset_str (sect_off
), objfile_name (objfile
));
22404 retval
.data
= DW_BLOCK (attr
)->data
;
22405 retval
.size
= DW_BLOCK (attr
)->size
;
22407 retval
.per_objfile
= dwarf2_per_objfile
;
22408 retval
.per_cu
= cu
->per_cu
;
22410 age_cached_comp_units (dwarf2_per_objfile
);
22417 struct dwarf2_locexpr_baton
22418 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22419 dwarf2_per_cu_data
*per_cu
,
22420 dwarf2_per_objfile
*per_objfile
,
22421 CORE_ADDR (*get_frame_pc
) (void *baton
),
22424 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22426 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, per_objfile
,
22427 get_frame_pc
, baton
);
22430 /* Write a constant of a given type as target-ordered bytes into
22433 static const gdb_byte
*
22434 write_constant_as_bytes (struct obstack
*obstack
,
22435 enum bfd_endian byte_order
,
22442 *len
= TYPE_LENGTH (type
);
22443 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22444 store_unsigned_integer (result
, *len
, byte_order
, value
);
22452 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22453 dwarf2_per_cu_data
*per_cu
,
22454 dwarf2_per_objfile
*per_objfile
,
22458 struct dwarf2_cu
*cu
;
22459 struct die_info
*die
;
22460 struct attribute
*attr
;
22461 const gdb_byte
*result
= NULL
;
22464 enum bfd_endian byte_order
;
22465 struct objfile
*objfile
= per_objfile
->objfile
;
22467 if (per_cu
->cu
== NULL
)
22468 load_cu (per_cu
, per_objfile
, false);
22472 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22473 Instead just throw an error, not much else we can do. */
22474 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22475 sect_offset_str (sect_off
), objfile_name (objfile
));
22478 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22480 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22481 sect_offset_str (sect_off
), objfile_name (objfile
));
22483 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22487 byte_order
= (bfd_big_endian (objfile
->obfd
)
22488 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22490 switch (attr
->form
)
22493 case DW_FORM_addrx
:
22494 case DW_FORM_GNU_addr_index
:
22498 *len
= cu
->header
.addr_size
;
22499 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22500 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22504 case DW_FORM_string
:
22507 case DW_FORM_GNU_str_index
:
22508 case DW_FORM_GNU_strp_alt
:
22509 /* DW_STRING is already allocated on the objfile obstack, point
22511 result
= (const gdb_byte
*) DW_STRING (attr
);
22512 *len
= strlen (DW_STRING (attr
));
22514 case DW_FORM_block1
:
22515 case DW_FORM_block2
:
22516 case DW_FORM_block4
:
22517 case DW_FORM_block
:
22518 case DW_FORM_exprloc
:
22519 case DW_FORM_data16
:
22520 result
= DW_BLOCK (attr
)->data
;
22521 *len
= DW_BLOCK (attr
)->size
;
22524 /* The DW_AT_const_value attributes are supposed to carry the
22525 symbol's value "represented as it would be on the target
22526 architecture." By the time we get here, it's already been
22527 converted to host endianness, so we just need to sign- or
22528 zero-extend it as appropriate. */
22529 case DW_FORM_data1
:
22530 type
= die_type (die
, cu
);
22531 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22532 if (result
== NULL
)
22533 result
= write_constant_as_bytes (obstack
, byte_order
,
22536 case DW_FORM_data2
:
22537 type
= die_type (die
, cu
);
22538 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22539 if (result
== NULL
)
22540 result
= write_constant_as_bytes (obstack
, byte_order
,
22543 case DW_FORM_data4
:
22544 type
= die_type (die
, cu
);
22545 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22546 if (result
== NULL
)
22547 result
= write_constant_as_bytes (obstack
, byte_order
,
22550 case DW_FORM_data8
:
22551 type
= die_type (die
, cu
);
22552 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22553 if (result
== NULL
)
22554 result
= write_constant_as_bytes (obstack
, byte_order
,
22558 case DW_FORM_sdata
:
22559 case DW_FORM_implicit_const
:
22560 type
= die_type (die
, cu
);
22561 result
= write_constant_as_bytes (obstack
, byte_order
,
22562 type
, DW_SND (attr
), len
);
22565 case DW_FORM_udata
:
22566 type
= die_type (die
, cu
);
22567 result
= write_constant_as_bytes (obstack
, byte_order
,
22568 type
, DW_UNSND (attr
), len
);
22572 complaint (_("unsupported const value attribute form: '%s'"),
22573 dwarf_form_name (attr
->form
));
22583 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22584 dwarf2_per_cu_data
*per_cu
,
22585 dwarf2_per_objfile
*per_objfile
)
22587 struct dwarf2_cu
*cu
;
22588 struct die_info
*die
;
22590 if (per_cu
->cu
== NULL
)
22591 load_cu (per_cu
, per_objfile
, false);
22596 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22600 return die_type (die
, cu
);
22606 dwarf2_get_die_type (cu_offset die_offset
,
22607 dwarf2_per_cu_data
*per_cu
,
22608 dwarf2_per_objfile
*per_objfile
)
22610 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22611 return get_die_type_at_offset (die_offset_sect
, per_cu
, per_objfile
);
22614 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22615 On entry *REF_CU is the CU of SRC_DIE.
22616 On exit *REF_CU is the CU of the result.
22617 Returns NULL if the referenced DIE isn't found. */
22619 static struct die_info
*
22620 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22621 struct dwarf2_cu
**ref_cu
)
22623 struct die_info temp_die
;
22624 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22625 struct die_info
*die
;
22626 dwarf2_per_objfile
*dwarf2_per_objfile
= (*ref_cu
)->per_objfile
;
22629 /* While it might be nice to assert sig_type->type == NULL here,
22630 we can get here for DW_AT_imported_declaration where we need
22631 the DIE not the type. */
22633 /* If necessary, add it to the queue and load its DIEs. */
22635 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, dwarf2_per_objfile
,
22637 read_signatured_type (sig_type
, dwarf2_per_objfile
);
22639 sig_cu
= sig_type
->per_cu
.cu
;
22640 gdb_assert (sig_cu
!= NULL
);
22641 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22642 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22643 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22644 to_underlying (temp_die
.sect_off
));
22647 /* For .gdb_index version 7 keep track of included TUs.
22648 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22649 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
22650 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7)
22652 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22657 sig_cu
->ancestor
= cu
;
22665 /* Follow signatured type referenced by ATTR in SRC_DIE.
22666 On entry *REF_CU is the CU of SRC_DIE.
22667 On exit *REF_CU is the CU of the result.
22668 The result is the DIE of the type.
22669 If the referenced type cannot be found an error is thrown. */
22671 static struct die_info
*
22672 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22673 struct dwarf2_cu
**ref_cu
)
22675 ULONGEST signature
= DW_SIGNATURE (attr
);
22676 struct signatured_type
*sig_type
;
22677 struct die_info
*die
;
22679 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22681 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22682 /* sig_type will be NULL if the signatured type is missing from
22684 if (sig_type
== NULL
)
22686 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22687 " from DIE at %s [in module %s]"),
22688 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22689 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22692 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22695 dump_die_for_error (src_die
);
22696 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22697 " from DIE at %s [in module %s]"),
22698 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22699 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22705 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22706 reading in and processing the type unit if necessary. */
22708 static struct type
*
22709 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22710 struct dwarf2_cu
*cu
)
22712 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22713 struct signatured_type
*sig_type
;
22714 struct dwarf2_cu
*type_cu
;
22715 struct die_info
*type_die
;
22718 sig_type
= lookup_signatured_type (cu
, signature
);
22719 /* sig_type will be NULL if the signatured type is missing from
22721 if (sig_type
== NULL
)
22723 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22724 " from DIE at %s [in module %s]"),
22725 hex_string (signature
), sect_offset_str (die
->sect_off
),
22726 objfile_name (dwarf2_per_objfile
->objfile
));
22727 return build_error_marker_type (cu
, die
);
22730 /* If we already know the type we're done. */
22731 type
= dwarf2_per_objfile
->get_type_for_signatured_type (sig_type
);
22732 if (type
!= nullptr)
22736 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22737 if (type_die
!= NULL
)
22739 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22740 is created. This is important, for example, because for c++ classes
22741 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22742 type
= read_type_die (type_die
, type_cu
);
22745 complaint (_("Dwarf Error: Cannot build signatured type %s"
22746 " referenced from DIE at %s [in module %s]"),
22747 hex_string (signature
), sect_offset_str (die
->sect_off
),
22748 objfile_name (dwarf2_per_objfile
->objfile
));
22749 type
= build_error_marker_type (cu
, die
);
22754 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22755 " from DIE at %s [in module %s]"),
22756 hex_string (signature
), sect_offset_str (die
->sect_off
),
22757 objfile_name (dwarf2_per_objfile
->objfile
));
22758 type
= build_error_marker_type (cu
, die
);
22761 dwarf2_per_objfile
->set_type_for_signatured_type (sig_type
, type
);
22766 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22767 reading in and processing the type unit if necessary. */
22769 static struct type
*
22770 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22771 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22773 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22774 if (attr
->form_is_ref ())
22776 struct dwarf2_cu
*type_cu
= cu
;
22777 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22779 return read_type_die (type_die
, type_cu
);
22781 else if (attr
->form
== DW_FORM_ref_sig8
)
22783 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22787 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22789 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22790 " at %s [in module %s]"),
22791 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22792 objfile_name (dwarf2_per_objfile
->objfile
));
22793 return build_error_marker_type (cu
, die
);
22797 /* Load the DIEs associated with type unit PER_CU into memory. */
22800 load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
22801 dwarf2_per_objfile
*per_objfile
)
22803 struct signatured_type
*sig_type
;
22805 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22806 gdb_assert (! per_cu
->type_unit_group_p ());
22808 /* We have the per_cu, but we need the signatured_type.
22809 Fortunately this is an easy translation. */
22810 gdb_assert (per_cu
->is_debug_types
);
22811 sig_type
= (struct signatured_type
*) per_cu
;
22813 gdb_assert (per_cu
->cu
== NULL
);
22815 read_signatured_type (sig_type
, per_objfile
);
22817 gdb_assert (per_cu
->cu
!= NULL
);
22820 /* Read in a signatured type and build its CU and DIEs.
22821 If the type is a stub for the real type in a DWO file,
22822 read in the real type from the DWO file as well. */
22825 read_signatured_type (signatured_type
*sig_type
,
22826 dwarf2_per_objfile
*per_objfile
)
22828 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22830 gdb_assert (per_cu
->is_debug_types
);
22831 gdb_assert (per_cu
->cu
== NULL
);
22833 cutu_reader
reader (per_cu
, per_objfile
, NULL
, 0, false);
22835 if (!reader
.dummy_p
)
22837 struct dwarf2_cu
*cu
= reader
.cu
;
22838 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22840 gdb_assert (cu
->die_hash
== NULL
);
22842 htab_create_alloc_ex (cu
->header
.length
/ 12,
22846 &cu
->comp_unit_obstack
,
22847 hashtab_obstack_allocate
,
22848 dummy_obstack_deallocate
);
22850 if (reader
.comp_unit_die
->has_children
)
22851 reader
.comp_unit_die
->child
22852 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22853 reader
.comp_unit_die
);
22854 cu
->dies
= reader
.comp_unit_die
;
22855 /* comp_unit_die is not stored in die_hash, no need. */
22857 /* We try not to read any attributes in this function, because
22858 not all CUs needed for references have been loaded yet, and
22859 symbol table processing isn't initialized. But we have to
22860 set the CU language, or we won't be able to build types
22861 correctly. Similarly, if we do not read the producer, we can
22862 not apply producer-specific interpretation. */
22863 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22868 sig_type
->per_cu
.tu_read
= 1;
22871 /* Decode simple location descriptions.
22872 Given a pointer to a dwarf block that defines a location, compute
22873 the location and return the value. If COMPUTED is non-null, it is
22874 set to true to indicate that decoding was successful, and false
22875 otherwise. If COMPUTED is null, then this function may emit a
22879 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22881 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22883 size_t size
= blk
->size
;
22884 const gdb_byte
*data
= blk
->data
;
22885 CORE_ADDR stack
[64];
22887 unsigned int bytes_read
, unsnd
;
22890 if (computed
!= nullptr)
22896 stack
[++stacki
] = 0;
22935 stack
[++stacki
] = op
- DW_OP_lit0
;
22970 stack
[++stacki
] = op
- DW_OP_reg0
;
22973 if (computed
== nullptr)
22974 dwarf2_complex_location_expr_complaint ();
22981 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22983 stack
[++stacki
] = unsnd
;
22986 if (computed
== nullptr)
22987 dwarf2_complex_location_expr_complaint ();
22994 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22999 case DW_OP_const1u
:
23000 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23004 case DW_OP_const1s
:
23005 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23009 case DW_OP_const2u
:
23010 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23014 case DW_OP_const2s
:
23015 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23019 case DW_OP_const4u
:
23020 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23024 case DW_OP_const4s
:
23025 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23029 case DW_OP_const8u
:
23030 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23035 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23041 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23046 stack
[stacki
+ 1] = stack
[stacki
];
23051 stack
[stacki
- 1] += stack
[stacki
];
23055 case DW_OP_plus_uconst
:
23056 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23062 stack
[stacki
- 1] -= stack
[stacki
];
23067 /* If we're not the last op, then we definitely can't encode
23068 this using GDB's address_class enum. This is valid for partial
23069 global symbols, although the variable's address will be bogus
23073 if (computed
== nullptr)
23074 dwarf2_complex_location_expr_complaint ();
23080 case DW_OP_GNU_push_tls_address
:
23081 case DW_OP_form_tls_address
:
23082 /* The top of the stack has the offset from the beginning
23083 of the thread control block at which the variable is located. */
23084 /* Nothing should follow this operator, so the top of stack would
23086 /* This is valid for partial global symbols, but the variable's
23087 address will be bogus in the psymtab. Make it always at least
23088 non-zero to not look as a variable garbage collected by linker
23089 which have DW_OP_addr 0. */
23092 if (computed
== nullptr)
23093 dwarf2_complex_location_expr_complaint ();
23100 case DW_OP_GNU_uninit
:
23101 if (computed
!= nullptr)
23106 case DW_OP_GNU_addr_index
:
23107 case DW_OP_GNU_const_index
:
23108 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23114 if (computed
== nullptr)
23116 const char *name
= get_DW_OP_name (op
);
23119 complaint (_("unsupported stack op: '%s'"),
23122 complaint (_("unsupported stack op: '%02x'"),
23126 return (stack
[stacki
]);
23129 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23130 outside of the allocated space. Also enforce minimum>0. */
23131 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23133 if (computed
== nullptr)
23134 complaint (_("location description stack overflow"));
23140 if (computed
== nullptr)
23141 complaint (_("location description stack underflow"));
23146 if (computed
!= nullptr)
23148 return (stack
[stacki
]);
23151 /* memory allocation interface */
23153 static struct dwarf_block
*
23154 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23156 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23159 static struct die_info
*
23160 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23162 struct die_info
*die
;
23163 size_t size
= sizeof (struct die_info
);
23166 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23168 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23169 memset (die
, 0, sizeof (struct die_info
));
23175 /* Macro support. */
23177 /* An overload of dwarf_decode_macros that finds the correct section
23178 and ensures it is read in before calling the other overload. */
23181 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23182 int section_is_gnu
)
23184 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23185 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23186 const struct line_header
*lh
= cu
->line_header
;
23187 unsigned int offset_size
= cu
->header
.offset_size
;
23188 struct dwarf2_section_info
*section
;
23189 const char *section_name
;
23191 if (cu
->dwo_unit
!= nullptr)
23193 if (section_is_gnu
)
23195 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23196 section_name
= ".debug_macro.dwo";
23200 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23201 section_name
= ".debug_macinfo.dwo";
23206 if (section_is_gnu
)
23208 section
= &dwarf2_per_objfile
->per_bfd
->macro
;
23209 section_name
= ".debug_macro";
23213 section
= &dwarf2_per_objfile
->per_bfd
->macinfo
;
23214 section_name
= ".debug_macinfo";
23218 section
->read (objfile
);
23219 if (section
->buffer
== nullptr)
23221 complaint (_("missing %s section"), section_name
);
23225 buildsym_compunit
*builder
= cu
->get_builder ();
23227 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23228 offset_size
, offset
, section_is_gnu
);
23231 /* Return the .debug_loc section to use for CU.
23232 For DWO files use .debug_loc.dwo. */
23234 static struct dwarf2_section_info
*
23235 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23237 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23241 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23243 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23245 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->per_bfd
->loclists
23246 : &dwarf2_per_objfile
->per_bfd
->loc
);
23249 /* A helper function that fills in a dwarf2_loclist_baton. */
23252 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23253 struct dwarf2_loclist_baton
*baton
,
23254 const struct attribute
*attr
)
23256 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23257 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23259 section
->read (dwarf2_per_objfile
->objfile
);
23261 baton
->per_objfile
= dwarf2_per_objfile
;
23262 baton
->per_cu
= cu
->per_cu
;
23263 gdb_assert (baton
->per_cu
);
23264 /* We don't know how long the location list is, but make sure we
23265 don't run off the edge of the section. */
23266 baton
->size
= section
->size
- DW_UNSND (attr
);
23267 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23268 if (cu
->base_address
.has_value ())
23269 baton
->base_address
= *cu
->base_address
;
23271 baton
->base_address
= 0;
23272 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23276 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23277 struct dwarf2_cu
*cu
, int is_block
)
23279 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23280 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23281 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23283 if (attr
->form_is_section_offset ()
23284 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23285 the section. If so, fall through to the complaint in the
23287 && DW_UNSND (attr
) < section
->get_size (objfile
))
23289 struct dwarf2_loclist_baton
*baton
;
23291 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23293 fill_in_loclist_baton (cu
, baton
, attr
);
23295 if (!cu
->base_address
.has_value ())
23296 complaint (_("Location list used without "
23297 "specifying the CU base address."));
23299 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23300 ? dwarf2_loclist_block_index
23301 : dwarf2_loclist_index
);
23302 SYMBOL_LOCATION_BATON (sym
) = baton
;
23306 struct dwarf2_locexpr_baton
*baton
;
23308 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23309 baton
->per_objfile
= dwarf2_per_objfile
;
23310 baton
->per_cu
= cu
->per_cu
;
23311 gdb_assert (baton
->per_cu
);
23313 if (attr
->form_is_block ())
23315 /* Note that we're just copying the block's data pointer
23316 here, not the actual data. We're still pointing into the
23317 info_buffer for SYM's objfile; right now we never release
23318 that buffer, but when we do clean up properly this may
23320 baton
->size
= DW_BLOCK (attr
)->size
;
23321 baton
->data
= DW_BLOCK (attr
)->data
;
23325 dwarf2_invalid_attrib_class_complaint ("location description",
23326 sym
->natural_name ());
23330 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23331 ? dwarf2_locexpr_block_index
23332 : dwarf2_locexpr_index
);
23333 SYMBOL_LOCATION_BATON (sym
) = baton
;
23337 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23338 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23339 CU_HEADERP first. */
23341 static const struct comp_unit_head
*
23342 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23343 const struct dwarf2_per_cu_data
*per_cu
)
23345 const gdb_byte
*info_ptr
;
23348 return &per_cu
->cu
->header
;
23350 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23352 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23353 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23354 rcuh_kind::COMPILE
);
23362 dwarf2_per_cu_data::addr_size () const
23364 struct comp_unit_head cu_header_local
;
23365 const struct comp_unit_head
*cu_headerp
;
23367 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23369 return cu_headerp
->addr_size
;
23375 dwarf2_per_cu_data::offset_size () const
23377 struct comp_unit_head cu_header_local
;
23378 const struct comp_unit_head
*cu_headerp
;
23380 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23382 return cu_headerp
->offset_size
;
23388 dwarf2_per_cu_data::ref_addr_size () const
23390 struct comp_unit_head cu_header_local
;
23391 const struct comp_unit_head
*cu_headerp
;
23393 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23395 if (cu_headerp
->version
== 2)
23396 return cu_headerp
->addr_size
;
23398 return cu_headerp
->offset_size
;
23404 dwarf2_cu::addr_type () const
23406 struct objfile
*objfile
= this->per_objfile
->objfile
;
23407 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23408 struct type
*addr_type
= lookup_pointer_type (void_type
);
23409 int addr_size
= this->per_cu
->addr_size ();
23411 if (TYPE_LENGTH (addr_type
) == addr_size
)
23414 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23418 /* A helper function for dwarf2_find_containing_comp_unit that returns
23419 the index of the result, and that searches a vector. It will
23420 return a result even if the offset in question does not actually
23421 occur in any CU. This is separate so that it can be unit
23425 dwarf2_find_containing_comp_unit
23426 (sect_offset sect_off
,
23427 unsigned int offset_in_dwz
,
23428 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23433 high
= all_comp_units
.size () - 1;
23436 struct dwarf2_per_cu_data
*mid_cu
;
23437 int mid
= low
+ (high
- low
) / 2;
23439 mid_cu
= all_comp_units
[mid
];
23440 if (mid_cu
->is_dwz
> offset_in_dwz
23441 || (mid_cu
->is_dwz
== offset_in_dwz
23442 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23447 gdb_assert (low
== high
);
23451 /* Locate the .debug_info compilation unit from CU's objfile which contains
23452 the DIE at OFFSET. Raises an error on failure. */
23454 static struct dwarf2_per_cu_data
*
23455 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23456 unsigned int offset_in_dwz
,
23457 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23460 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23461 dwarf2_per_objfile
->per_bfd
->all_comp_units
);
23462 struct dwarf2_per_cu_data
*this_cu
23463 = dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
];
23465 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23467 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23468 error (_("Dwarf Error: could not find partial DIE containing "
23469 "offset %s [in module %s]"),
23470 sect_offset_str (sect_off
),
23471 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23473 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1]->sect_off
23475 return dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1];
23479 if (low
== dwarf2_per_objfile
->per_bfd
->all_comp_units
.size () - 1
23480 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23481 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23482 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23489 namespace selftests
{
23490 namespace find_containing_comp_unit
{
23495 struct dwarf2_per_cu_data one
{};
23496 struct dwarf2_per_cu_data two
{};
23497 struct dwarf2_per_cu_data three
{};
23498 struct dwarf2_per_cu_data four
{};
23501 two
.sect_off
= sect_offset (one
.length
);
23506 four
.sect_off
= sect_offset (three
.length
);
23510 std::vector
<dwarf2_per_cu_data
*> units
;
23511 units
.push_back (&one
);
23512 units
.push_back (&two
);
23513 units
.push_back (&three
);
23514 units
.push_back (&four
);
23518 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23519 SELF_CHECK (units
[result
] == &one
);
23520 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23521 SELF_CHECK (units
[result
] == &one
);
23522 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23523 SELF_CHECK (units
[result
] == &two
);
23525 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23526 SELF_CHECK (units
[result
] == &three
);
23527 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23528 SELF_CHECK (units
[result
] == &three
);
23529 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23530 SELF_CHECK (units
[result
] == &four
);
23536 #endif /* GDB_SELF_TEST */
23538 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE. */
23540 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
23541 dwarf2_per_objfile
*per_objfile
)
23543 per_objfile (per_objfile
),
23545 has_loclist (false),
23546 checked_producer (false),
23547 producer_is_gxx_lt_4_6 (false),
23548 producer_is_gcc_lt_4_3 (false),
23549 producer_is_icc (false),
23550 producer_is_icc_lt_14 (false),
23551 producer_is_codewarrior (false),
23552 processing_has_namespace_info (false)
23557 /* Destroy a dwarf2_cu. */
23559 dwarf2_cu::~dwarf2_cu ()
23564 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23567 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23568 enum language pretend_language
)
23570 struct attribute
*attr
;
23572 /* Set the language we're debugging. */
23573 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23574 if (attr
!= nullptr)
23575 set_cu_language (DW_UNSND (attr
), cu
);
23578 cu
->language
= pretend_language
;
23579 cu
->language_defn
= language_def (cu
->language
);
23582 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23585 /* Increase the age counter on each cached compilation unit, and free
23586 any that are too old. */
23589 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23591 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23593 dwarf2_clear_marks (dwarf2_per_objfile
->per_bfd
->read_in_chain
);
23594 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23595 while (per_cu
!= NULL
)
23597 per_cu
->cu
->last_used
++;
23598 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23599 dwarf2_mark (per_cu
->cu
);
23600 per_cu
= per_cu
->cu
->read_in_chain
;
23603 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23604 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23605 while (per_cu
!= NULL
)
23607 struct dwarf2_per_cu_data
*next_cu
;
23609 next_cu
= per_cu
->cu
->read_in_chain
;
23611 if (!per_cu
->cu
->mark
)
23614 *last_chain
= next_cu
;
23617 last_chain
= &per_cu
->cu
->read_in_chain
;
23623 /* Remove a single compilation unit from the cache. */
23626 free_one_cached_comp_unit (dwarf2_per_cu_data
*target_per_cu
,
23627 dwarf2_per_objfile
*dwarf2_per_objfile
)
23629 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23631 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23632 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23633 while (per_cu
!= NULL
)
23635 struct dwarf2_per_cu_data
*next_cu
;
23637 next_cu
= per_cu
->cu
->read_in_chain
;
23639 if (per_cu
== target_per_cu
)
23643 *last_chain
= next_cu
;
23647 last_chain
= &per_cu
->cu
->read_in_chain
;
23653 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23654 We store these in a hash table separate from the DIEs, and preserve them
23655 when the DIEs are flushed out of cache.
23657 The CU "per_cu" pointer is needed because offset alone is not enough to
23658 uniquely identify the type. A file may have multiple .debug_types sections,
23659 or the type may come from a DWO file. Furthermore, while it's more logical
23660 to use per_cu->section+offset, with Fission the section with the data is in
23661 the DWO file but we don't know that section at the point we need it.
23662 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23663 because we can enter the lookup routine, get_die_type_at_offset, from
23664 outside this file, and thus won't necessarily have PER_CU->cu.
23665 Fortunately, PER_CU is stable for the life of the objfile. */
23667 struct dwarf2_per_cu_offset_and_type
23669 const struct dwarf2_per_cu_data
*per_cu
;
23670 sect_offset sect_off
;
23674 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23677 per_cu_offset_and_type_hash (const void *item
)
23679 const struct dwarf2_per_cu_offset_and_type
*ofs
23680 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23682 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23685 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23688 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23690 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23691 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23692 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23693 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23695 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23696 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23699 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23700 table if necessary. For convenience, return TYPE.
23702 The DIEs reading must have careful ordering to:
23703 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23704 reading current DIE.
23705 * Not trying to dereference contents of still incompletely read in types
23706 while reading in other DIEs.
23707 * Enable referencing still incompletely read in types just by a pointer to
23708 the type without accessing its fields.
23710 Therefore caller should follow these rules:
23711 * Try to fetch any prerequisite types we may need to build this DIE type
23712 before building the type and calling set_die_type.
23713 * After building type call set_die_type for current DIE as soon as
23714 possible before fetching more types to complete the current type.
23715 * Make the type as complete as possible before fetching more types. */
23717 static struct type
*
23718 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23720 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23721 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23722 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23723 struct attribute
*attr
;
23724 struct dynamic_prop prop
;
23726 /* For Ada types, make sure that the gnat-specific data is always
23727 initialized (if not already set). There are a few types where
23728 we should not be doing so, because the type-specific area is
23729 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23730 where the type-specific area is used to store the floatformat).
23731 But this is not a problem, because the gnat-specific information
23732 is actually not needed for these types. */
23733 if (need_gnat_info (cu
)
23734 && type
->code () != TYPE_CODE_FUNC
23735 && type
->code () != TYPE_CODE_FLT
23736 && type
->code () != TYPE_CODE_METHODPTR
23737 && type
->code () != TYPE_CODE_MEMBERPTR
23738 && type
->code () != TYPE_CODE_METHOD
23739 && !HAVE_GNAT_AUX_INFO (type
))
23740 INIT_GNAT_SPECIFIC (type
);
23742 /* Read DW_AT_allocated and set in type. */
23743 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23744 if (attr
!= NULL
&& attr
->form_is_block ())
23746 struct type
*prop_type
= cu
->addr_sized_int_type (false);
23747 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23748 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23750 else if (attr
!= NULL
)
23752 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23753 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23754 sect_offset_str (die
->sect_off
));
23757 /* Read DW_AT_associated and set in type. */
23758 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23759 if (attr
!= NULL
&& attr
->form_is_block ())
23761 struct type
*prop_type
= cu
->addr_sized_int_type (false);
23762 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23763 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23765 else if (attr
!= NULL
)
23767 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23768 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23769 sect_offset_str (die
->sect_off
));
23772 /* Read DW_AT_data_location and set in type. */
23773 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23774 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
23775 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23777 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23778 dwarf2_per_objfile
->die_type_hash
23779 = htab_up (htab_create_alloc (127,
23780 per_cu_offset_and_type_hash
,
23781 per_cu_offset_and_type_eq
,
23782 NULL
, xcalloc
, xfree
));
23784 ofs
.per_cu
= cu
->per_cu
;
23785 ofs
.sect_off
= die
->sect_off
;
23787 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23788 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23790 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23791 sect_offset_str (die
->sect_off
));
23792 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23793 struct dwarf2_per_cu_offset_and_type
);
23798 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23799 or return NULL if the die does not have a saved type. */
23801 static struct type
*
23802 get_die_type_at_offset (sect_offset sect_off
,
23803 dwarf2_per_cu_data
*per_cu
,
23804 dwarf2_per_objfile
*dwarf2_per_objfile
)
23806 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23808 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23811 ofs
.per_cu
= per_cu
;
23812 ofs
.sect_off
= sect_off
;
23813 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23814 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23821 /* Look up the type for DIE in CU in die_type_hash,
23822 or return NULL if DIE does not have a saved type. */
23824 static struct type
*
23825 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23827 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
, cu
->per_objfile
);
23830 /* Add a dependence relationship from CU to REF_PER_CU. */
23833 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23834 struct dwarf2_per_cu_data
*ref_per_cu
)
23838 if (cu
->dependencies
== NULL
)
23840 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23841 NULL
, &cu
->comp_unit_obstack
,
23842 hashtab_obstack_allocate
,
23843 dummy_obstack_deallocate
);
23845 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23847 *slot
= ref_per_cu
;
23850 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23851 Set the mark field in every compilation unit in the
23852 cache that we must keep because we are keeping CU. */
23855 dwarf2_mark_helper (void **slot
, void *data
)
23857 struct dwarf2_per_cu_data
*per_cu
;
23859 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23861 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23862 reading of the chain. As such dependencies remain valid it is not much
23863 useful to track and undo them during QUIT cleanups. */
23864 if (per_cu
->cu
== NULL
)
23867 if (per_cu
->cu
->mark
)
23869 per_cu
->cu
->mark
= true;
23871 if (per_cu
->cu
->dependencies
!= NULL
)
23872 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23877 /* Set the mark field in CU and in every other compilation unit in the
23878 cache that we must keep because we are keeping CU. */
23881 dwarf2_mark (struct dwarf2_cu
*cu
)
23886 if (cu
->dependencies
!= NULL
)
23887 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23891 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23895 per_cu
->cu
->mark
= false;
23896 per_cu
= per_cu
->cu
->read_in_chain
;
23900 /* Trivial hash function for partial_die_info: the hash value of a DIE
23901 is its offset in .debug_info for this objfile. */
23904 partial_die_hash (const void *item
)
23906 const struct partial_die_info
*part_die
23907 = (const struct partial_die_info
*) item
;
23909 return to_underlying (part_die
->sect_off
);
23912 /* Trivial comparison function for partial_die_info structures: two DIEs
23913 are equal if they have the same offset. */
23916 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23918 const struct partial_die_info
*part_die_lhs
23919 = (const struct partial_die_info
*) item_lhs
;
23920 const struct partial_die_info
*part_die_rhs
23921 = (const struct partial_die_info
*) item_rhs
;
23923 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23926 struct cmd_list_element
*set_dwarf_cmdlist
;
23927 struct cmd_list_element
*show_dwarf_cmdlist
;
23930 show_check_physname (struct ui_file
*file
, int from_tty
,
23931 struct cmd_list_element
*c
, const char *value
)
23933 fprintf_filtered (file
,
23934 _("Whether to check \"physname\" is %s.\n"),
23938 void _initialize_dwarf2_read ();
23940 _initialize_dwarf2_read ()
23942 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23943 Set DWARF specific variables.\n\
23944 Configure DWARF variables such as the cache size."),
23945 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23946 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23948 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23949 Show DWARF specific variables.\n\
23950 Show DWARF variables such as the cache size."),
23951 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23952 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23954 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23955 &dwarf_max_cache_age
, _("\
23956 Set the upper bound on the age of cached DWARF compilation units."), _("\
23957 Show the upper bound on the age of cached DWARF compilation units."), _("\
23958 A higher limit means that cached compilation units will be stored\n\
23959 in memory longer, and more total memory will be used. Zero disables\n\
23960 caching, which can slow down startup."),
23962 show_dwarf_max_cache_age
,
23963 &set_dwarf_cmdlist
,
23964 &show_dwarf_cmdlist
);
23966 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23967 Set debugging of the DWARF reader."), _("\
23968 Show debugging of the DWARF reader."), _("\
23969 When enabled (non-zero), debugging messages are printed during DWARF\n\
23970 reading and symtab expansion. A value of 1 (one) provides basic\n\
23971 information. A value greater than 1 provides more verbose information."),
23974 &setdebuglist
, &showdebuglist
);
23976 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23977 Set debugging of the DWARF DIE reader."), _("\
23978 Show debugging of the DWARF DIE reader."), _("\
23979 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23980 The value is the maximum depth to print."),
23983 &setdebuglist
, &showdebuglist
);
23985 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23986 Set debugging of the dwarf line reader."), _("\
23987 Show debugging of the dwarf line reader."), _("\
23988 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23989 A value of 1 (one) provides basic information.\n\
23990 A value greater than 1 provides more verbose information."),
23993 &setdebuglist
, &showdebuglist
);
23995 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23996 Set cross-checking of \"physname\" code against demangler."), _("\
23997 Show cross-checking of \"physname\" code against demangler."), _("\
23998 When enabled, GDB's internal \"physname\" code is checked against\n\
24000 NULL
, show_check_physname
,
24001 &setdebuglist
, &showdebuglist
);
24003 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24004 no_class
, &use_deprecated_index_sections
, _("\
24005 Set whether to use deprecated gdb_index sections."), _("\
24006 Show whether to use deprecated gdb_index sections."), _("\
24007 When enabled, deprecated .gdb_index sections are used anyway.\n\
24008 Normally they are ignored either because of a missing feature or\n\
24009 performance issue.\n\
24010 Warning: This option must be enabled before gdb reads the file."),
24013 &setlist
, &showlist
);
24015 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24016 &dwarf2_locexpr_funcs
);
24017 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24018 &dwarf2_loclist_funcs
);
24020 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24021 &dwarf2_block_frame_base_locexpr_funcs
);
24022 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24023 &dwarf2_block_frame_base_loclist_funcs
);
24026 selftests::register_test ("dw2_expand_symtabs_matching",
24027 selftests::dw2_expand_symtabs_matching::run_test
);
24028 selftests::register_test ("dwarf2_find_containing_comp_unit",
24029 selftests::find_containing_comp_unit::run_test
);