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 (struct dwarf2_per_cu_data
*per_cu
);
405 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
407 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
408 Create the set of symtabs used by this TU, or if this TU is sharing
409 symtabs with another TU and the symtabs have already been created
410 then restore those symtabs in the line header.
411 We don't need the pc/line-number mapping for type units. */
412 void setup_type_unit_groups (struct die_info
*die
);
414 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
415 buildsym_compunit constructor. */
416 struct compunit_symtab
*start_symtab (const char *name
,
417 const char *comp_dir
,
420 /* Reset the builder. */
421 void reset_builder () { m_builder
.reset (); }
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 gdb::optional
<CORE_ADDR
> base_address
;
429 /* The language we are debugging. */
430 enum language language
= language_unknown
;
431 const struct language_defn
*language_defn
= nullptr;
433 const char *producer
= nullptr;
436 /* The symtab builder for this CU. This is only non-NULL when full
437 symbols are being read. */
438 std::unique_ptr
<buildsym_compunit
> m_builder
;
441 /* The generic symbol table building routines have separate lists for
442 file scope symbols and all all other scopes (local scopes). So
443 we need to select the right one to pass to add_symbol_to_list().
444 We do it by keeping a pointer to the correct list in list_in_scope.
446 FIXME: The original dwarf code just treated the file scope as the
447 first local scope, and all other local scopes as nested local
448 scopes, and worked fine. Check to see if we really need to
449 distinguish these in buildsym.c. */
450 struct pending
**list_in_scope
= nullptr;
452 /* Hash table holding all the loaded partial DIEs
453 with partial_die->offset.SECT_OFF as hash. */
454 htab_t partial_dies
= nullptr;
456 /* Storage for things with the same lifetime as this read-in compilation
457 unit, including partial DIEs. */
458 auto_obstack comp_unit_obstack
;
460 /* When multiple dwarf2_cu structures are living in memory, this field
461 chains them all together, so that they can be released efficiently.
462 We will probably also want a generation counter so that most-recently-used
463 compilation units are cached... */
464 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
466 /* Backlink to our per_cu entry. */
467 struct dwarf2_per_cu_data
*per_cu
;
469 /* How many compilation units ago was this CU last referenced? */
472 /* A hash table of DIE cu_offset for following references with
473 die_info->offset.sect_off as hash. */
474 htab_t die_hash
= nullptr;
476 /* Full DIEs if read in. */
477 struct die_info
*dies
= nullptr;
479 /* A set of pointers to dwarf2_per_cu_data objects for compilation
480 units referenced by this one. Only set during full symbol processing;
481 partial symbol tables do not have dependencies. */
482 htab_t dependencies
= nullptr;
484 /* Header data from the line table, during full symbol processing. */
485 struct line_header
*line_header
= nullptr;
486 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
487 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
488 this is the DW_TAG_compile_unit die for this CU. We'll hold on
489 to the line header as long as this DIE is being processed. See
490 process_die_scope. */
491 die_info
*line_header_die_owner
= nullptr;
493 /* A list of methods which need to have physnames computed
494 after all type information has been read. */
495 std::vector
<delayed_method_info
> method_list
;
497 /* To be copied to symtab->call_site_htab. */
498 htab_t call_site_htab
= nullptr;
500 /* Non-NULL if this CU came from a DWO file.
501 There is an invariant here that is important to remember:
502 Except for attributes copied from the top level DIE in the "main"
503 (or "stub") file in preparation for reading the DWO file
504 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
505 Either there isn't a DWO file (in which case this is NULL and the point
506 is moot), or there is and either we're not going to read it (in which
507 case this is NULL) or there is and we are reading it (in which case this
509 struct dwo_unit
*dwo_unit
= nullptr;
511 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
512 Note this value comes from the Fission stub CU/TU's DIE. */
513 gdb::optional
<ULONGEST
> addr_base
;
515 /* The DW_AT_rnglists_base attribute if present.
516 Note this value comes from the Fission stub CU/TU's DIE.
517 Also note that the value is zero in the non-DWO case so this value can
518 be used without needing to know whether DWO files are in use or not.
519 N.B. This does not apply to DW_AT_ranges appearing in
520 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
521 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
522 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
523 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
524 ULONGEST ranges_base
= 0;
526 /* The DW_AT_loclists_base attribute if present. */
527 ULONGEST loclist_base
= 0;
529 /* When reading debug info generated by older versions of rustc, we
530 have to rewrite some union types to be struct types with a
531 variant part. This rewriting must be done after the CU is fully
532 read in, because otherwise at the point of rewriting some struct
533 type might not have been fully processed. So, we keep a list of
534 all such types here and process them after expansion. */
535 std::vector
<struct type
*> rust_unions
;
537 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
538 files, the value is implicitly zero. For DWARF 5 version DWO files, the
539 value is often implicit and is the size of the header of
540 .debug_str_offsets section (8 or 4, depending on the address size). */
541 gdb::optional
<ULONGEST
> str_offsets_base
;
543 /* Mark used when releasing cached dies. */
546 /* This CU references .debug_loc. See the symtab->locations_valid field.
547 This test is imperfect as there may exist optimized debug code not using
548 any location list and still facing inlining issues if handled as
549 unoptimized code. For a future better test see GCC PR other/32998. */
550 bool has_loclist
: 1;
552 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
553 if all the producer_is_* fields are valid. This information is cached
554 because profiling CU expansion showed excessive time spent in
555 producer_is_gxx_lt_4_6. */
556 bool checked_producer
: 1;
557 bool producer_is_gxx_lt_4_6
: 1;
558 bool producer_is_gcc_lt_4_3
: 1;
559 bool producer_is_icc
: 1;
560 bool producer_is_icc_lt_14
: 1;
561 bool producer_is_codewarrior
: 1;
563 /* When true, the file that we're processing is known to have
564 debugging info for C++ namespaces. GCC 3.3.x did not produce
565 this information, but later versions do. */
567 bool processing_has_namespace_info
: 1;
569 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
571 /* If this CU was inherited by another CU (via specification,
572 abstract_origin, etc), this is the ancestor CU. */
575 /* Get the buildsym_compunit for this CU. */
576 buildsym_compunit
*get_builder ()
578 /* If this CU has a builder associated with it, use that. */
579 if (m_builder
!= nullptr)
580 return m_builder
.get ();
582 /* Otherwise, search ancestors for a valid builder. */
583 if (ancestor
!= nullptr)
584 return ancestor
->get_builder ();
590 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
591 This includes type_unit_group and quick_file_names. */
593 struct stmt_list_hash
595 /* The DWO unit this table is from or NULL if there is none. */
596 struct dwo_unit
*dwo_unit
;
598 /* Offset in .debug_line or .debug_line.dwo. */
599 sect_offset line_sect_off
;
602 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
603 an object of this type. */
605 struct type_unit_group
607 /* dwarf2read.c's main "handle" on a TU symtab.
608 To simplify things we create an artificial CU that "includes" all the
609 type units using this stmt_list so that the rest of the code still has
610 a "per_cu" handle on the symtab. */
611 struct dwarf2_per_cu_data per_cu
;
613 /* The TUs that share this DW_AT_stmt_list entry.
614 This is added to while parsing type units to build partial symtabs,
615 and is deleted afterwards and not used again. */
616 std::vector
<signatured_type
*> *tus
;
618 /* The compunit symtab.
619 Type units in a group needn't all be defined in the same source file,
620 so we create an essentially anonymous symtab as the compunit symtab. */
621 struct compunit_symtab
*compunit_symtab
;
623 /* The data used to construct the hash key. */
624 struct stmt_list_hash hash
;
626 /* The symbol tables for this TU (obtained from the files listed in
628 WARNING: The order of entries here must match the order of entries
629 in the line header. After the first TU using this type_unit_group, the
630 line header for the subsequent TUs is recreated from this. This is done
631 because we need to use the same symtabs for each TU using the same
632 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
633 there's no guarantee the line header doesn't have duplicate entries. */
634 struct symtab
**symtabs
;
637 /* These sections are what may appear in a (real or virtual) DWO file. */
641 struct dwarf2_section_info abbrev
;
642 struct dwarf2_section_info line
;
643 struct dwarf2_section_info loc
;
644 struct dwarf2_section_info loclists
;
645 struct dwarf2_section_info macinfo
;
646 struct dwarf2_section_info macro
;
647 struct dwarf2_section_info str
;
648 struct dwarf2_section_info str_offsets
;
649 /* In the case of a virtual DWO file, these two are unused. */
650 struct dwarf2_section_info info
;
651 std::vector
<dwarf2_section_info
> types
;
654 /* CUs/TUs in DWP/DWO files. */
658 /* Backlink to the containing struct dwo_file. */
659 struct dwo_file
*dwo_file
;
661 /* The "id" that distinguishes this CU/TU.
662 .debug_info calls this "dwo_id", .debug_types calls this "signature".
663 Since signatures came first, we stick with it for consistency. */
666 /* The section this CU/TU lives in, in the DWO file. */
667 struct dwarf2_section_info
*section
;
669 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
670 sect_offset sect_off
;
673 /* For types, offset in the type's DIE of the type defined by this TU. */
674 cu_offset type_offset_in_tu
;
677 /* include/dwarf2.h defines the DWP section codes.
678 It defines a max value but it doesn't define a min value, which we
679 use for error checking, so provide one. */
681 enum dwp_v2_section_ids
686 /* Data for one DWO file.
688 This includes virtual DWO files (a virtual DWO file is a DWO file as it
689 appears in a DWP file). DWP files don't really have DWO files per se -
690 comdat folding of types "loses" the DWO file they came from, and from
691 a high level view DWP files appear to contain a mass of random types.
692 However, to maintain consistency with the non-DWP case we pretend DWP
693 files contain virtual DWO files, and we assign each TU with one virtual
694 DWO file (generally based on the line and abbrev section offsets -
695 a heuristic that seems to work in practice). */
699 dwo_file () = default;
700 DISABLE_COPY_AND_ASSIGN (dwo_file
);
702 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
703 For virtual DWO files the name is constructed from the section offsets
704 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
705 from related CU+TUs. */
706 const char *dwo_name
= nullptr;
708 /* The DW_AT_comp_dir attribute. */
709 const char *comp_dir
= nullptr;
711 /* The bfd, when the file is open. Otherwise this is NULL.
712 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
713 gdb_bfd_ref_ptr dbfd
;
715 /* The sections that make up this DWO file.
716 Remember that for virtual DWO files in DWP V2, these are virtual
717 sections (for lack of a better name). */
718 struct dwo_sections sections
{};
720 /* The CUs in the file.
721 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
722 an extension to handle LLVM's Link Time Optimization output (where
723 multiple source files may be compiled into a single object/dwo pair). */
726 /* Table of TUs in the file.
727 Each element is a struct dwo_unit. */
731 /* These sections are what may appear in a DWP file. */
735 /* These are used by both DWP version 1 and 2. */
736 struct dwarf2_section_info str
;
737 struct dwarf2_section_info cu_index
;
738 struct dwarf2_section_info tu_index
;
740 /* These are only used by DWP version 2 files.
741 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
742 sections are referenced by section number, and are not recorded here.
743 In DWP version 2 there is at most one copy of all these sections, each
744 section being (effectively) comprised of the concatenation of all of the
745 individual sections that exist in the version 1 format.
746 To keep the code simple we treat each of these concatenated pieces as a
747 section itself (a virtual section?). */
748 struct dwarf2_section_info abbrev
;
749 struct dwarf2_section_info info
;
750 struct dwarf2_section_info line
;
751 struct dwarf2_section_info loc
;
752 struct dwarf2_section_info macinfo
;
753 struct dwarf2_section_info macro
;
754 struct dwarf2_section_info str_offsets
;
755 struct dwarf2_section_info types
;
758 /* These sections are what may appear in a virtual DWO file in DWP version 1.
759 A virtual DWO file is a DWO file as it appears in a DWP file. */
761 struct virtual_v1_dwo_sections
763 struct dwarf2_section_info abbrev
;
764 struct dwarf2_section_info line
;
765 struct dwarf2_section_info loc
;
766 struct dwarf2_section_info macinfo
;
767 struct dwarf2_section_info macro
;
768 struct dwarf2_section_info str_offsets
;
769 /* Each DWP hash table entry records one CU or one TU.
770 That is recorded here, and copied to dwo_unit.section. */
771 struct dwarf2_section_info info_or_types
;
774 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
775 In version 2, the sections of the DWO files are concatenated together
776 and stored in one section of that name. Thus each ELF section contains
777 several "virtual" sections. */
779 struct virtual_v2_dwo_sections
781 bfd_size_type abbrev_offset
;
782 bfd_size_type abbrev_size
;
784 bfd_size_type line_offset
;
785 bfd_size_type line_size
;
787 bfd_size_type loc_offset
;
788 bfd_size_type loc_size
;
790 bfd_size_type macinfo_offset
;
791 bfd_size_type macinfo_size
;
793 bfd_size_type macro_offset
;
794 bfd_size_type macro_size
;
796 bfd_size_type str_offsets_offset
;
797 bfd_size_type str_offsets_size
;
799 /* Each DWP hash table entry records one CU or one TU.
800 That is recorded here, and copied to dwo_unit.section. */
801 bfd_size_type info_or_types_offset
;
802 bfd_size_type info_or_types_size
;
805 /* Contents of DWP hash tables. */
807 struct dwp_hash_table
809 uint32_t version
, nr_columns
;
810 uint32_t nr_units
, nr_slots
;
811 const gdb_byte
*hash_table
, *unit_table
;
816 const gdb_byte
*indices
;
820 /* This is indexed by column number and gives the id of the section
822 #define MAX_NR_V2_DWO_SECTIONS \
823 (1 /* .debug_info or .debug_types */ \
824 + 1 /* .debug_abbrev */ \
825 + 1 /* .debug_line */ \
826 + 1 /* .debug_loc */ \
827 + 1 /* .debug_str_offsets */ \
828 + 1 /* .debug_macro or .debug_macinfo */)
829 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
830 const gdb_byte
*offsets
;
831 const gdb_byte
*sizes
;
836 /* Data for one DWP file. */
840 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
842 dbfd (std::move (abfd
))
846 /* Name of the file. */
849 /* File format version. */
853 gdb_bfd_ref_ptr dbfd
;
855 /* Section info for this file. */
856 struct dwp_sections sections
{};
858 /* Table of CUs in the file. */
859 const struct dwp_hash_table
*cus
= nullptr;
861 /* Table of TUs in the file. */
862 const struct dwp_hash_table
*tus
= nullptr;
864 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
868 /* Table to map ELF section numbers to their sections.
869 This is only needed for the DWP V1 file format. */
870 unsigned int num_sections
= 0;
871 asection
**elf_sections
= nullptr;
874 /* Struct used to pass misc. parameters to read_die_and_children, et
875 al. which are used for both .debug_info and .debug_types dies.
876 All parameters here are unchanging for the life of the call. This
877 struct exists to abstract away the constant parameters of die reading. */
879 struct die_reader_specs
881 /* The bfd of die_section. */
884 /* The CU of the DIE we are parsing. */
885 struct dwarf2_cu
*cu
;
887 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
888 struct dwo_file
*dwo_file
;
890 /* The section the die comes from.
891 This is either .debug_info or .debug_types, or the .dwo variants. */
892 struct dwarf2_section_info
*die_section
;
894 /* die_section->buffer. */
895 const gdb_byte
*buffer
;
897 /* The end of the buffer. */
898 const gdb_byte
*buffer_end
;
900 /* The abbreviation table to use when reading the DIEs. */
901 struct abbrev_table
*abbrev_table
;
904 /* A subclass of die_reader_specs that holds storage and has complex
905 constructor and destructor behavior. */
907 class cutu_reader
: public die_reader_specs
911 cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
912 struct abbrev_table
*abbrev_table
,
916 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
917 struct dwarf2_cu
*parent_cu
= nullptr,
918 struct dwo_file
*dwo_file
= nullptr);
920 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
922 const gdb_byte
*info_ptr
= nullptr;
923 struct die_info
*comp_unit_die
= nullptr;
924 bool dummy_p
= false;
926 /* Release the new CU, putting it on the chain. This cannot be done
931 void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
932 int use_existing_cu
);
934 struct dwarf2_per_cu_data
*m_this_cu
;
935 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
937 /* The ordinary abbreviation table. */
938 abbrev_table_up m_abbrev_table_holder
;
940 /* The DWO abbreviation table. */
941 abbrev_table_up m_dwo_abbrev_table
;
944 /* When we construct a partial symbol table entry we only
945 need this much information. */
946 struct partial_die_info
: public allocate_on_obstack
948 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
950 /* Disable assign but still keep copy ctor, which is needed
951 load_partial_dies. */
952 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
954 /* Adjust the partial die before generating a symbol for it. This
955 function may set the is_external flag or change the DIE's
957 void fixup (struct dwarf2_cu
*cu
);
959 /* Read a minimal amount of information into the minimal die
961 const gdb_byte
*read (const struct die_reader_specs
*reader
,
962 const struct abbrev_info
&abbrev
,
963 const gdb_byte
*info_ptr
);
965 /* Offset of this DIE. */
966 const sect_offset sect_off
;
968 /* DWARF-2 tag for this DIE. */
969 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
971 /* Assorted flags describing the data found in this DIE. */
972 const unsigned int has_children
: 1;
974 unsigned int is_external
: 1;
975 unsigned int is_declaration
: 1;
976 unsigned int has_type
: 1;
977 unsigned int has_specification
: 1;
978 unsigned int has_pc_info
: 1;
979 unsigned int may_be_inlined
: 1;
981 /* This DIE has been marked DW_AT_main_subprogram. */
982 unsigned int main_subprogram
: 1;
984 /* Flag set if the SCOPE field of this structure has been
986 unsigned int scope_set
: 1;
988 /* Flag set if the DIE has a byte_size attribute. */
989 unsigned int has_byte_size
: 1;
991 /* Flag set if the DIE has a DW_AT_const_value attribute. */
992 unsigned int has_const_value
: 1;
994 /* Flag set if any of the DIE's children are template arguments. */
995 unsigned int has_template_arguments
: 1;
997 /* Flag set if fixup has been called on this die. */
998 unsigned int fixup_called
: 1;
1000 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1001 unsigned int is_dwz
: 1;
1003 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1004 unsigned int spec_is_dwz
: 1;
1006 /* The name of this DIE. Normally the value of DW_AT_name, but
1007 sometimes a default name for unnamed DIEs. */
1008 const char *name
= nullptr;
1010 /* The linkage name, if present. */
1011 const char *linkage_name
= nullptr;
1013 /* The scope to prepend to our children. This is generally
1014 allocated on the comp_unit_obstack, so will disappear
1015 when this compilation unit leaves the cache. */
1016 const char *scope
= nullptr;
1018 /* Some data associated with the partial DIE. The tag determines
1019 which field is live. */
1022 /* The location description associated with this DIE, if any. */
1023 struct dwarf_block
*locdesc
;
1024 /* The offset of an import, for DW_TAG_imported_unit. */
1025 sect_offset sect_off
;
1028 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1029 CORE_ADDR lowpc
= 0;
1030 CORE_ADDR highpc
= 0;
1032 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1033 DW_AT_sibling, if any. */
1034 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1035 could return DW_AT_sibling values to its caller load_partial_dies. */
1036 const gdb_byte
*sibling
= nullptr;
1038 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1039 DW_AT_specification (or DW_AT_abstract_origin or
1040 DW_AT_extension). */
1041 sect_offset spec_offset
{};
1043 /* Pointers to this DIE's parent, first child, and next sibling,
1045 struct partial_die_info
*die_parent
= nullptr;
1046 struct partial_die_info
*die_child
= nullptr;
1047 struct partial_die_info
*die_sibling
= nullptr;
1049 friend struct partial_die_info
*
1050 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1053 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1054 partial_die_info (sect_offset sect_off
)
1055 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1059 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1061 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1066 has_specification
= 0;
1069 main_subprogram
= 0;
1072 has_const_value
= 0;
1073 has_template_arguments
= 0;
1080 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1081 but this would require a corresponding change in unpack_field_as_long
1083 static int bits_per_byte
= 8;
1085 struct variant_part_builder
;
1087 /* When reading a variant, we track a bit more information about the
1088 field, and store it in an object of this type. */
1090 struct variant_field
1092 int first_field
= -1;
1093 int last_field
= -1;
1095 /* A variant can contain other variant parts. */
1096 std::vector
<variant_part_builder
> variant_parts
;
1098 /* If we see a DW_TAG_variant, then this will be set if this is the
1100 bool default_branch
= false;
1101 /* If we see a DW_AT_discr_value, then this will be the discriminant
1103 ULONGEST discriminant_value
= 0;
1104 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1106 struct dwarf_block
*discr_list_data
= nullptr;
1109 /* This represents a DW_TAG_variant_part. */
1111 struct variant_part_builder
1113 /* The offset of the discriminant field. */
1114 sect_offset discriminant_offset
{};
1116 /* Variants that are direct children of this variant part. */
1117 std::vector
<variant_field
> variants
;
1119 /* True if we're currently reading a variant. */
1120 bool processing_variant
= false;
1125 int accessibility
= 0;
1127 /* Variant parts need to find the discriminant, which is a DIE
1128 reference. We track the section offset of each field to make
1131 struct field field
{};
1136 const char *name
= nullptr;
1137 std::vector
<struct fn_field
> fnfields
;
1140 /* The routines that read and process dies for a C struct or C++ class
1141 pass lists of data member fields and lists of member function fields
1142 in an instance of a field_info structure, as defined below. */
1145 /* List of data member and baseclasses fields. */
1146 std::vector
<struct nextfield
> fields
;
1147 std::vector
<struct nextfield
> baseclasses
;
1149 /* Set if the accessibility of one of the fields is not public. */
1150 int non_public_fields
= 0;
1152 /* Member function fieldlist array, contains name of possibly overloaded
1153 member function, number of overloaded member functions and a pointer
1154 to the head of the member function field chain. */
1155 std::vector
<struct fnfieldlist
> fnfieldlists
;
1157 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1158 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1159 std::vector
<struct decl_field
> typedef_field_list
;
1161 /* Nested types defined by this class and the number of elements in this
1163 std::vector
<struct decl_field
> nested_types_list
;
1165 /* If non-null, this is the variant part we are currently
1167 variant_part_builder
*current_variant_part
= nullptr;
1168 /* This holds all the top-level variant parts attached to the type
1170 std::vector
<variant_part_builder
> variant_parts
;
1172 /* Return the total number of fields (including baseclasses). */
1173 int nfields () const
1175 return fields
.size () + baseclasses
.size ();
1179 /* Loaded secondary compilation units are kept in memory until they
1180 have not been referenced for the processing of this many
1181 compilation units. Set this to zero to disable caching. Cache
1182 sizes of up to at least twenty will improve startup time for
1183 typical inter-CU-reference binaries, at an obvious memory cost. */
1184 static int dwarf_max_cache_age
= 5;
1186 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1187 struct cmd_list_element
*c
, const char *value
)
1189 fprintf_filtered (file
, _("The upper bound on the age of cached "
1190 "DWARF compilation units is %s.\n"),
1194 /* local function prototypes */
1196 static void dwarf2_find_base_address (struct die_info
*die
,
1197 struct dwarf2_cu
*cu
);
1199 static dwarf2_psymtab
*create_partial_symtab
1200 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1202 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1203 const gdb_byte
*info_ptr
,
1204 struct die_info
*type_unit_die
);
1206 static void dwarf2_build_psymtabs_hard
1207 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1209 static void scan_partial_symbols (struct partial_die_info
*,
1210 CORE_ADDR
*, CORE_ADDR
*,
1211 int, struct dwarf2_cu
*);
1213 static void add_partial_symbol (struct partial_die_info
*,
1214 struct dwarf2_cu
*);
1216 static void add_partial_namespace (struct partial_die_info
*pdi
,
1217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1218 int set_addrmap
, struct dwarf2_cu
*cu
);
1220 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1221 CORE_ADDR
*highpc
, int set_addrmap
,
1222 struct dwarf2_cu
*cu
);
1224 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1225 struct dwarf2_cu
*cu
);
1227 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1228 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1229 int need_pc
, struct dwarf2_cu
*cu
);
1231 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1233 static struct partial_die_info
*load_partial_dies
1234 (const struct die_reader_specs
*, const gdb_byte
*, int);
1236 /* A pair of partial_die_info and compilation unit. */
1237 struct cu_partial_die_info
1239 /* The compilation unit of the partial_die_info. */
1240 struct dwarf2_cu
*cu
;
1241 /* A partial_die_info. */
1242 struct partial_die_info
*pdi
;
1244 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1250 cu_partial_die_info () = delete;
1253 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1254 struct dwarf2_cu
*);
1256 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1257 struct attribute
*, struct attr_abbrev
*,
1258 const gdb_byte
*, bool *need_reprocess
);
1260 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1261 struct attribute
*attr
);
1263 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1265 static sect_offset read_abbrev_offset
1266 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1267 struct dwarf2_section_info
*, sect_offset
);
1269 static const char *read_indirect_string
1270 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1271 const struct comp_unit_head
*, unsigned int *);
1273 static const char *read_indirect_string_at_offset
1274 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1276 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1280 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1281 ULONGEST str_index
);
1283 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1284 ULONGEST str_index
);
1286 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1288 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1289 struct dwarf2_cu
*);
1291 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1292 struct dwarf2_cu
*cu
);
1294 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1296 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1297 struct dwarf2_cu
*cu
);
1299 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1301 static struct die_info
*die_specification (struct die_info
*die
,
1302 struct dwarf2_cu
**);
1304 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1305 struct dwarf2_cu
*cu
);
1307 static void dwarf_decode_lines (struct line_header
*, const char *,
1308 struct dwarf2_cu
*, dwarf2_psymtab
*,
1309 CORE_ADDR
, int decode_mapping
);
1311 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1314 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1315 struct dwarf2_cu
*, struct symbol
* = NULL
);
1317 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1318 struct dwarf2_cu
*);
1320 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1323 struct obstack
*obstack
,
1324 struct dwarf2_cu
*cu
, LONGEST
*value
,
1325 const gdb_byte
**bytes
,
1326 struct dwarf2_locexpr_baton
**baton
);
1328 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1330 static int need_gnat_info (struct dwarf2_cu
*);
1332 static struct type
*die_descriptive_type (struct die_info
*,
1333 struct dwarf2_cu
*);
1335 static void set_descriptive_type (struct type
*, struct die_info
*,
1336 struct dwarf2_cu
*);
1338 static struct type
*die_containing_type (struct die_info
*,
1339 struct dwarf2_cu
*);
1341 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1342 struct dwarf2_cu
*);
1344 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1346 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1348 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1350 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1351 const char *suffix
, int physname
,
1352 struct dwarf2_cu
*cu
);
1354 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1356 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1358 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1360 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1362 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1364 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1366 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1367 struct dwarf2_cu
*, dwarf2_psymtab
*);
1369 /* Return the .debug_loclists section to use for cu. */
1370 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1372 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1373 values. Keep the items ordered with increasing constraints compliance. */
1376 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1377 PC_BOUNDS_NOT_PRESENT
,
1379 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1380 were present but they do not form a valid range of PC addresses. */
1383 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1386 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1390 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1391 CORE_ADDR
*, CORE_ADDR
*,
1395 static void get_scope_pc_bounds (struct die_info
*,
1396 CORE_ADDR
*, CORE_ADDR
*,
1397 struct dwarf2_cu
*);
1399 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1400 CORE_ADDR
, struct dwarf2_cu
*);
1402 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1403 struct dwarf2_cu
*);
1405 static void dwarf2_attach_fields_to_type (struct field_info
*,
1406 struct type
*, struct dwarf2_cu
*);
1408 static void dwarf2_add_member_fn (struct field_info
*,
1409 struct die_info
*, struct type
*,
1410 struct dwarf2_cu
*);
1412 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1414 struct dwarf2_cu
*);
1416 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1418 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1420 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1422 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1424 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1426 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1428 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1430 static struct type
*read_module_type (struct die_info
*die
,
1431 struct dwarf2_cu
*cu
);
1433 static const char *namespace_name (struct die_info
*die
,
1434 int *is_anonymous
, struct dwarf2_cu
*);
1436 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1438 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1441 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1442 struct dwarf2_cu
*);
1444 static struct die_info
*read_die_and_siblings_1
1445 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1448 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1449 const gdb_byte
*info_ptr
,
1450 const gdb_byte
**new_info_ptr
,
1451 struct die_info
*parent
);
1453 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1454 struct die_info
**, const gdb_byte
*,
1457 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1458 struct die_info
**, const gdb_byte
*);
1460 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1462 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1465 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1467 static const char *dwarf2_full_name (const char *name
,
1468 struct die_info
*die
,
1469 struct dwarf2_cu
*cu
);
1471 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1472 struct dwarf2_cu
*cu
);
1474 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1475 struct dwarf2_cu
**);
1477 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1479 static void dump_die_for_error (struct die_info
*);
1481 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1484 /*static*/ void dump_die (struct die_info
*, int max_level
);
1486 static void store_in_ref_table (struct die_info
*,
1487 struct dwarf2_cu
*);
1489 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1490 const struct attribute
*,
1491 struct dwarf2_cu
**);
1493 static struct die_info
*follow_die_ref (struct die_info
*,
1494 const struct attribute
*,
1495 struct dwarf2_cu
**);
1497 static struct die_info
*follow_die_sig (struct die_info
*,
1498 const struct attribute
*,
1499 struct dwarf2_cu
**);
1501 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1502 struct dwarf2_cu
*);
1504 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1505 const struct attribute
*,
1506 struct dwarf2_cu
*);
1508 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1510 static void read_signatured_type (struct signatured_type
*);
1512 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1513 struct die_info
*die
, struct dwarf2_cu
*cu
,
1514 struct dynamic_prop
*prop
, struct type
*type
);
1516 /* memory allocation interface */
1518 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1520 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1522 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1524 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1525 struct dwarf2_loclist_baton
*baton
,
1526 const struct attribute
*attr
);
1528 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1530 struct dwarf2_cu
*cu
,
1533 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1534 const gdb_byte
*info_ptr
,
1535 struct abbrev_info
*abbrev
);
1537 static hashval_t
partial_die_hash (const void *item
);
1539 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1541 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1542 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1543 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1545 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1546 struct die_info
*comp_unit_die
,
1547 enum language pretend_language
);
1549 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1551 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1553 static struct type
*set_die_type (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*);
1556 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1558 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1560 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1563 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1566 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1569 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1570 struct dwarf2_per_cu_data
*);
1572 static void dwarf2_mark (struct dwarf2_cu
*);
1574 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1576 static struct type
*get_die_type_at_offset (sect_offset
,
1577 struct dwarf2_per_cu_data
*);
1579 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1581 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1582 enum language pretend_language
);
1584 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1586 /* Class, the destructor of which frees all allocated queue entries. This
1587 will only have work to do if an error was thrown while processing the
1588 dwarf. If no error was thrown then the queue entries should have all
1589 been processed, and freed, as we went along. */
1591 class dwarf2_queue_guard
1594 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1595 : m_per_objfile (per_objfile
)
1599 /* Free any entries remaining on the queue. There should only be
1600 entries left if we hit an error while processing the dwarf. */
1601 ~dwarf2_queue_guard ()
1603 /* Ensure that no memory is allocated by the queue. */
1604 std::queue
<dwarf2_queue_item
> empty
;
1605 std::swap (m_per_objfile
->queue
, empty
);
1608 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1611 dwarf2_per_objfile
*m_per_objfile
;
1614 dwarf2_queue_item::~dwarf2_queue_item ()
1616 /* Anything still marked queued is likely to be in an
1617 inconsistent state, so discard it. */
1620 if (per_cu
->cu
!= NULL
)
1621 free_one_cached_comp_unit (per_cu
);
1626 /* The return type of find_file_and_directory. Note, the enclosed
1627 string pointers are only valid while this object is valid. */
1629 struct file_and_directory
1631 /* The filename. This is never NULL. */
1634 /* The compilation directory. NULL if not known. If we needed to
1635 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1636 points directly to the DW_AT_comp_dir string attribute owned by
1637 the obstack that owns the DIE. */
1638 const char *comp_dir
;
1640 /* If we needed to build a new string for comp_dir, this is what
1641 owns the storage. */
1642 std::string comp_dir_storage
;
1645 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1646 struct dwarf2_cu
*cu
);
1648 static htab_up
allocate_signatured_type_table ();
1650 static htab_up
allocate_dwo_unit_table ();
1652 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1653 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1654 struct dwp_file
*dwp_file
, const char *comp_dir
,
1655 ULONGEST signature
, int is_debug_types
);
1657 static struct dwp_file
*get_dwp_file
1658 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1660 static struct dwo_unit
*lookup_dwo_comp_unit
1661 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1663 static struct dwo_unit
*lookup_dwo_type_unit
1664 (struct signatured_type
*, const char *, const char *);
1666 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1668 /* A unique pointer to a dwo_file. */
1670 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1672 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1674 static void check_producer (struct dwarf2_cu
*cu
);
1676 static void free_line_header_voidp (void *arg
);
1678 /* Various complaints about symbol reading that don't abort the process. */
1681 dwarf2_debug_line_missing_file_complaint (void)
1683 complaint (_(".debug_line section has line data without a file"));
1687 dwarf2_debug_line_missing_end_sequence_complaint (void)
1689 complaint (_(".debug_line section has line "
1690 "program sequence without an end"));
1694 dwarf2_complex_location_expr_complaint (void)
1696 complaint (_("location expression too complex"));
1700 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1703 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1708 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1710 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1714 /* Hash function for line_header_hash. */
1717 line_header_hash (const struct line_header
*ofs
)
1719 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1722 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1725 line_header_hash_voidp (const void *item
)
1727 const struct line_header
*ofs
= (const struct line_header
*) item
;
1729 return line_header_hash (ofs
);
1732 /* Equality function for line_header_hash. */
1735 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1737 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1738 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1740 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1741 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1746 /* See declaration. */
1748 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1749 const dwarf2_debug_sections
*names
,
1751 : objfile (objfile_
),
1752 can_copy (can_copy_
)
1755 names
= &dwarf2_elf_names
;
1757 bfd
*obfd
= objfile
->obfd
;
1759 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1760 locate_sections (obfd
, sec
, *names
);
1763 dwarf2_per_objfile::~dwarf2_per_objfile ()
1765 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1766 free_cached_comp_units ();
1768 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1769 per_cu
->imported_symtabs_free ();
1771 for (signatured_type
*sig_type
: all_type_units
)
1772 sig_type
->per_cu
.imported_symtabs_free ();
1774 /* Everything else should be on the objfile obstack. */
1777 /* See declaration. */
1780 dwarf2_per_objfile::free_cached_comp_units ()
1782 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1783 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1784 while (per_cu
!= NULL
)
1786 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1789 *last_chain
= next_cu
;
1794 /* A helper class that calls free_cached_comp_units on
1797 class free_cached_comp_units
1801 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1802 : m_per_objfile (per_objfile
)
1806 ~free_cached_comp_units ()
1808 m_per_objfile
->free_cached_comp_units ();
1811 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1815 dwarf2_per_objfile
*m_per_objfile
;
1818 /* Try to locate the sections we need for DWARF 2 debugging
1819 information and return true if we have enough to do something.
1820 NAMES points to the dwarf2 section names, or is NULL if the standard
1821 ELF names are used. CAN_COPY is true for formats where symbol
1822 interposition is possible and so symbol values must follow copy
1823 relocation rules. */
1826 dwarf2_has_info (struct objfile
*objfile
,
1827 const struct dwarf2_debug_sections
*names
,
1830 if (objfile
->flags
& OBJF_READNEVER
)
1833 struct dwarf2_per_objfile
*dwarf2_per_objfile
1834 = get_dwarf2_per_objfile (objfile
);
1836 if (dwarf2_per_objfile
== NULL
)
1837 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
1841 return (!dwarf2_per_objfile
->info
.is_virtual
1842 && dwarf2_per_objfile
->info
.s
.section
!= NULL
1843 && !dwarf2_per_objfile
->abbrev
.is_virtual
1844 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
1847 /* When loading sections, we look either for uncompressed section or for
1848 compressed section names. */
1851 section_is_p (const char *section_name
,
1852 const struct dwarf2_section_names
*names
)
1854 if (names
->normal
!= NULL
1855 && strcmp (section_name
, names
->normal
) == 0)
1857 if (names
->compressed
!= NULL
1858 && strcmp (section_name
, names
->compressed
) == 0)
1863 /* See declaration. */
1866 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
1867 const dwarf2_debug_sections
&names
)
1869 flagword aflag
= bfd_section_flags (sectp
);
1871 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1874 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1875 > bfd_get_file_size (abfd
))
1877 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1878 warning (_("Discarding section %s which has a section size (%s"
1879 ") larger than the file size [in module %s]"),
1880 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1881 bfd_get_filename (abfd
));
1883 else if (section_is_p (sectp
->name
, &names
.info
))
1885 this->info
.s
.section
= sectp
;
1886 this->info
.size
= bfd_section_size (sectp
);
1888 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1890 this->abbrev
.s
.section
= sectp
;
1891 this->abbrev
.size
= bfd_section_size (sectp
);
1893 else if (section_is_p (sectp
->name
, &names
.line
))
1895 this->line
.s
.section
= sectp
;
1896 this->line
.size
= bfd_section_size (sectp
);
1898 else if (section_is_p (sectp
->name
, &names
.loc
))
1900 this->loc
.s
.section
= sectp
;
1901 this->loc
.size
= bfd_section_size (sectp
);
1903 else if (section_is_p (sectp
->name
, &names
.loclists
))
1905 this->loclists
.s
.section
= sectp
;
1906 this->loclists
.size
= bfd_section_size (sectp
);
1908 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1910 this->macinfo
.s
.section
= sectp
;
1911 this->macinfo
.size
= bfd_section_size (sectp
);
1913 else if (section_is_p (sectp
->name
, &names
.macro
))
1915 this->macro
.s
.section
= sectp
;
1916 this->macro
.size
= bfd_section_size (sectp
);
1918 else if (section_is_p (sectp
->name
, &names
.str
))
1920 this->str
.s
.section
= sectp
;
1921 this->str
.size
= bfd_section_size (sectp
);
1923 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1925 this->str_offsets
.s
.section
= sectp
;
1926 this->str_offsets
.size
= bfd_section_size (sectp
);
1928 else if (section_is_p (sectp
->name
, &names
.line_str
))
1930 this->line_str
.s
.section
= sectp
;
1931 this->line_str
.size
= bfd_section_size (sectp
);
1933 else if (section_is_p (sectp
->name
, &names
.addr
))
1935 this->addr
.s
.section
= sectp
;
1936 this->addr
.size
= bfd_section_size (sectp
);
1938 else if (section_is_p (sectp
->name
, &names
.frame
))
1940 this->frame
.s
.section
= sectp
;
1941 this->frame
.size
= bfd_section_size (sectp
);
1943 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1945 this->eh_frame
.s
.section
= sectp
;
1946 this->eh_frame
.size
= bfd_section_size (sectp
);
1948 else if (section_is_p (sectp
->name
, &names
.ranges
))
1950 this->ranges
.s
.section
= sectp
;
1951 this->ranges
.size
= bfd_section_size (sectp
);
1953 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1955 this->rnglists
.s
.section
= sectp
;
1956 this->rnglists
.size
= bfd_section_size (sectp
);
1958 else if (section_is_p (sectp
->name
, &names
.types
))
1960 struct dwarf2_section_info type_section
;
1962 memset (&type_section
, 0, sizeof (type_section
));
1963 type_section
.s
.section
= sectp
;
1964 type_section
.size
= bfd_section_size (sectp
);
1966 this->types
.push_back (type_section
);
1968 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
1970 this->gdb_index
.s
.section
= sectp
;
1971 this->gdb_index
.size
= bfd_section_size (sectp
);
1973 else if (section_is_p (sectp
->name
, &names
.debug_names
))
1975 this->debug_names
.s
.section
= sectp
;
1976 this->debug_names
.size
= bfd_section_size (sectp
);
1978 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
1980 this->debug_aranges
.s
.section
= sectp
;
1981 this->debug_aranges
.size
= bfd_section_size (sectp
);
1984 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
1985 && bfd_section_vma (sectp
) == 0)
1986 this->has_section_at_zero
= true;
1989 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1993 dwarf2_get_section_info (struct objfile
*objfile
,
1994 enum dwarf2_section_enum sect
,
1995 asection
**sectp
, const gdb_byte
**bufp
,
1996 bfd_size_type
*sizep
)
1998 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
1999 struct dwarf2_section_info
*info
;
2001 /* We may see an objfile without any DWARF, in which case we just
2012 case DWARF2_DEBUG_FRAME
:
2013 info
= &data
->frame
;
2015 case DWARF2_EH_FRAME
:
2016 info
= &data
->eh_frame
;
2019 gdb_assert_not_reached ("unexpected section");
2022 info
->read (objfile
);
2024 *sectp
= info
->get_bfd_section ();
2025 *bufp
= info
->buffer
;
2026 *sizep
= info
->size
;
2029 /* A helper function to find the sections for a .dwz file. */
2032 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2034 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2036 /* Note that we only support the standard ELF names, because .dwz
2037 is ELF-only (at the time of writing). */
2038 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2040 dwz_file
->abbrev
.s
.section
= sectp
;
2041 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2043 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2045 dwz_file
->info
.s
.section
= sectp
;
2046 dwz_file
->info
.size
= bfd_section_size (sectp
);
2048 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2050 dwz_file
->str
.s
.section
= sectp
;
2051 dwz_file
->str
.size
= bfd_section_size (sectp
);
2053 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2055 dwz_file
->line
.s
.section
= sectp
;
2056 dwz_file
->line
.size
= bfd_section_size (sectp
);
2058 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2060 dwz_file
->macro
.s
.section
= sectp
;
2061 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2063 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2065 dwz_file
->gdb_index
.s
.section
= sectp
;
2066 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2068 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2070 dwz_file
->debug_names
.s
.section
= sectp
;
2071 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2075 /* See dwarf2read.h. */
2078 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2080 const char *filename
;
2081 bfd_size_type buildid_len_arg
;
2085 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2086 return dwarf2_per_objfile
->dwz_file
.get ();
2088 bfd_set_error (bfd_error_no_error
);
2089 gdb::unique_xmalloc_ptr
<char> data
2090 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2091 &buildid_len_arg
, &buildid
));
2094 if (bfd_get_error () == bfd_error_no_error
)
2096 error (_("could not read '.gnu_debugaltlink' section: %s"),
2097 bfd_errmsg (bfd_get_error ()));
2100 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2102 buildid_len
= (size_t) buildid_len_arg
;
2104 filename
= data
.get ();
2106 std::string abs_storage
;
2107 if (!IS_ABSOLUTE_PATH (filename
))
2109 gdb::unique_xmalloc_ptr
<char> abs
2110 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2112 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2113 filename
= abs_storage
.c_str ();
2116 /* First try the file name given in the section. If that doesn't
2117 work, try to use the build-id instead. */
2118 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
));
2119 if (dwz_bfd
!= NULL
)
2121 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2122 dwz_bfd
.reset (nullptr);
2125 if (dwz_bfd
== NULL
)
2126 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2128 if (dwz_bfd
== nullptr)
2130 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2131 const char *origname
= dwarf2_per_objfile
->objfile
->original_name
;
2133 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2140 /* File successfully retrieved from server. */
2141 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2143 if (dwz_bfd
== nullptr)
2144 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2145 alt_filename
.get ());
2146 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2147 dwz_bfd
.reset (nullptr);
2151 if (dwz_bfd
== NULL
)
2152 error (_("could not find '.gnu_debugaltlink' file for %s"),
2153 objfile_name (dwarf2_per_objfile
->objfile
));
2155 std::unique_ptr
<struct dwz_file
> result
2156 (new struct dwz_file (std::move (dwz_bfd
)));
2158 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2161 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2162 result
->dwz_bfd
.get ());
2163 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2164 return dwarf2_per_objfile
->dwz_file
.get ();
2167 /* DWARF quick_symbols_functions support. */
2169 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2170 unique line tables, so we maintain a separate table of all .debug_line
2171 derived entries to support the sharing.
2172 All the quick functions need is the list of file names. We discard the
2173 line_header when we're done and don't need to record it here. */
2174 struct quick_file_names
2176 /* The data used to construct the hash key. */
2177 struct stmt_list_hash hash
;
2179 /* The number of entries in file_names, real_names. */
2180 unsigned int num_file_names
;
2182 /* The file names from the line table, after being run through
2184 const char **file_names
;
2186 /* The file names from the line table after being run through
2187 gdb_realpath. These are computed lazily. */
2188 const char **real_names
;
2191 /* When using the index (and thus not using psymtabs), each CU has an
2192 object of this type. This is used to hold information needed by
2193 the various "quick" methods. */
2194 struct dwarf2_per_cu_quick_data
2196 /* The file table. This can be NULL if there was no file table
2197 or it's currently not read in.
2198 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2199 struct quick_file_names
*file_names
;
2201 /* The corresponding symbol table. This is NULL if symbols for this
2202 CU have not yet been read. */
2203 struct compunit_symtab
*compunit_symtab
;
2205 /* A temporary mark bit used when iterating over all CUs in
2206 expand_symtabs_matching. */
2207 unsigned int mark
: 1;
2209 /* True if we've tried to read the file table and found there isn't one.
2210 There will be no point in trying to read it again next time. */
2211 unsigned int no_file_data
: 1;
2214 /* Utility hash function for a stmt_list_hash. */
2217 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2221 if (stmt_list_hash
->dwo_unit
!= NULL
)
2222 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2223 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2227 /* Utility equality function for a stmt_list_hash. */
2230 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2231 const struct stmt_list_hash
*rhs
)
2233 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2235 if (lhs
->dwo_unit
!= NULL
2236 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2239 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2242 /* Hash function for a quick_file_names. */
2245 hash_file_name_entry (const void *e
)
2247 const struct quick_file_names
*file_data
2248 = (const struct quick_file_names
*) e
;
2250 return hash_stmt_list_entry (&file_data
->hash
);
2253 /* Equality function for a quick_file_names. */
2256 eq_file_name_entry (const void *a
, const void *b
)
2258 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2259 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2261 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2264 /* Delete function for a quick_file_names. */
2267 delete_file_name_entry (void *e
)
2269 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2272 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2274 xfree ((void*) file_data
->file_names
[i
]);
2275 if (file_data
->real_names
)
2276 xfree ((void*) file_data
->real_names
[i
]);
2279 /* The space for the struct itself lives on objfile_obstack,
2280 so we don't free it here. */
2283 /* Create a quick_file_names hash table. */
2286 create_quick_file_names_table (unsigned int nr_initial_entries
)
2288 return htab_up (htab_create_alloc (nr_initial_entries
,
2289 hash_file_name_entry
, eq_file_name_entry
,
2290 delete_file_name_entry
, xcalloc
, xfree
));
2293 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2294 have to be created afterwards. You should call age_cached_comp_units after
2295 processing PER_CU->CU. dw2_setup must have been already called. */
2298 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2300 if (per_cu
->is_debug_types
)
2301 load_full_type_unit (per_cu
);
2303 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2305 if (per_cu
->cu
== NULL
)
2306 return; /* Dummy CU. */
2308 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2311 /* Read in the symbols for PER_CU. */
2314 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2316 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2318 /* Skip type_unit_groups, reading the type units they contain
2319 is handled elsewhere. */
2320 if (per_cu
->type_unit_group_p ())
2323 /* The destructor of dwarf2_queue_guard frees any entries left on
2324 the queue. After this point we're guaranteed to leave this function
2325 with the dwarf queue empty. */
2326 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2328 if (dwarf2_per_objfile
->using_index
2329 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2330 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2332 queue_comp_unit (per_cu
, language_minimal
);
2333 load_cu (per_cu
, skip_partial
);
2335 /* If we just loaded a CU from a DWO, and we're working with an index
2336 that may badly handle TUs, load all the TUs in that DWO as well.
2337 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2338 if (!per_cu
->is_debug_types
2339 && per_cu
->cu
!= NULL
2340 && per_cu
->cu
->dwo_unit
!= NULL
2341 && dwarf2_per_objfile
->index_table
!= NULL
2342 && dwarf2_per_objfile
->index_table
->version
<= 7
2343 /* DWP files aren't supported yet. */
2344 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2345 queue_and_load_all_dwo_tus (per_cu
);
2348 process_queue (dwarf2_per_objfile
);
2350 /* Age the cache, releasing compilation units that have not
2351 been used recently. */
2352 age_cached_comp_units (dwarf2_per_objfile
);
2355 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2356 the objfile from which this CU came. Returns the resulting symbol
2359 static struct compunit_symtab
*
2360 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2362 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2364 gdb_assert (dwarf2_per_objfile
->using_index
);
2365 if (!per_cu
->v
.quick
->compunit_symtab
)
2367 free_cached_comp_units
freer (dwarf2_per_objfile
);
2368 scoped_restore decrementer
= increment_reading_symtab ();
2369 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2370 process_cu_includes (dwarf2_per_objfile
);
2373 return per_cu
->v
.quick
->compunit_symtab
;
2376 /* See declaration. */
2378 dwarf2_per_cu_data
*
2379 dwarf2_per_objfile::get_cutu (int index
)
2381 if (index
>= this->all_comp_units
.size ())
2383 index
-= this->all_comp_units
.size ();
2384 gdb_assert (index
< this->all_type_units
.size ());
2385 return &this->all_type_units
[index
]->per_cu
;
2388 return this->all_comp_units
[index
];
2391 /* See declaration. */
2393 dwarf2_per_cu_data
*
2394 dwarf2_per_objfile::get_cu (int index
)
2396 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2398 return this->all_comp_units
[index
];
2401 /* See declaration. */
2404 dwarf2_per_objfile::get_tu (int index
)
2406 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2408 return this->all_type_units
[index
];
2411 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2412 objfile_obstack, and constructed with the specified field
2415 static dwarf2_per_cu_data
*
2416 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2417 struct dwarf2_section_info
*section
,
2419 sect_offset sect_off
, ULONGEST length
)
2421 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2422 dwarf2_per_cu_data
*the_cu
2423 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2424 struct dwarf2_per_cu_data
);
2425 the_cu
->sect_off
= sect_off
;
2426 the_cu
->length
= length
;
2427 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2428 the_cu
->section
= section
;
2429 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2430 struct dwarf2_per_cu_quick_data
);
2431 the_cu
->is_dwz
= is_dwz
;
2435 /* A helper for create_cus_from_index that handles a given list of
2439 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2440 const gdb_byte
*cu_list
, offset_type n_elements
,
2441 struct dwarf2_section_info
*section
,
2444 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2446 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2448 sect_offset sect_off
2449 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2450 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2453 dwarf2_per_cu_data
*per_cu
2454 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2456 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2460 /* Read the CU list from the mapped index, and use it to create all
2461 the CU objects for this objfile. */
2464 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2465 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2466 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2468 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2469 dwarf2_per_objfile
->all_comp_units
.reserve
2470 ((cu_list_elements
+ dwz_elements
) / 2);
2472 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2473 &dwarf2_per_objfile
->info
, 0);
2475 if (dwz_elements
== 0)
2478 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2479 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2483 /* Create the signatured type hash table from the index. */
2486 create_signatured_type_table_from_index
2487 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2488 struct dwarf2_section_info
*section
,
2489 const gdb_byte
*bytes
,
2490 offset_type elements
)
2492 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2494 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2495 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2497 htab_up sig_types_hash
= allocate_signatured_type_table ();
2499 for (offset_type i
= 0; i
< elements
; i
+= 3)
2501 struct signatured_type
*sig_type
;
2504 cu_offset type_offset_in_tu
;
2506 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2507 sect_offset sect_off
2508 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2510 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2512 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2515 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2516 struct signatured_type
);
2517 sig_type
->signature
= signature
;
2518 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2519 sig_type
->per_cu
.is_debug_types
= 1;
2520 sig_type
->per_cu
.section
= section
;
2521 sig_type
->per_cu
.sect_off
= sect_off
;
2522 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2523 sig_type
->per_cu
.v
.quick
2524 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2525 struct dwarf2_per_cu_quick_data
);
2527 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2530 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2533 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2536 /* Create the signatured type hash table from .debug_names. */
2539 create_signatured_type_table_from_debug_names
2540 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2541 const mapped_debug_names
&map
,
2542 struct dwarf2_section_info
*section
,
2543 struct dwarf2_section_info
*abbrev_section
)
2545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2547 section
->read (objfile
);
2548 abbrev_section
->read (objfile
);
2550 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2551 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2553 htab_up sig_types_hash
= allocate_signatured_type_table ();
2555 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2557 struct signatured_type
*sig_type
;
2560 sect_offset sect_off
2561 = (sect_offset
) (extract_unsigned_integer
2562 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2564 map
.dwarf5_byte_order
));
2566 comp_unit_head cu_header
;
2567 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2569 section
->buffer
+ to_underlying (sect_off
),
2572 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2573 struct signatured_type
);
2574 sig_type
->signature
= cu_header
.signature
;
2575 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2576 sig_type
->per_cu
.is_debug_types
= 1;
2577 sig_type
->per_cu
.section
= section
;
2578 sig_type
->per_cu
.sect_off
= sect_off
;
2579 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2580 sig_type
->per_cu
.v
.quick
2581 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2582 struct dwarf2_per_cu_quick_data
);
2584 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2587 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2590 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2593 /* Read the address map data from the mapped index, and use it to
2594 populate the objfile's psymtabs_addrmap. */
2597 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2598 struct mapped_index
*index
)
2600 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2601 struct gdbarch
*gdbarch
= objfile
->arch ();
2602 const gdb_byte
*iter
, *end
;
2603 struct addrmap
*mutable_map
;
2606 auto_obstack temp_obstack
;
2608 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2610 iter
= index
->address_table
.data ();
2611 end
= iter
+ index
->address_table
.size ();
2613 baseaddr
= objfile
->text_section_offset ();
2617 ULONGEST hi
, lo
, cu_index
;
2618 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2620 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2622 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2627 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2628 hex_string (lo
), hex_string (hi
));
2632 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2634 complaint (_(".gdb_index address table has invalid CU number %u"),
2635 (unsigned) cu_index
);
2639 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2640 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2641 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2642 dwarf2_per_objfile
->get_cu (cu_index
));
2645 objfile
->partial_symtabs
->psymtabs_addrmap
2646 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2649 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2650 populate the objfile's psymtabs_addrmap. */
2653 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2654 struct dwarf2_section_info
*section
)
2656 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2657 bfd
*abfd
= objfile
->obfd
;
2658 struct gdbarch
*gdbarch
= objfile
->arch ();
2659 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2661 auto_obstack temp_obstack
;
2662 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2664 std::unordered_map
<sect_offset
,
2665 dwarf2_per_cu_data
*,
2666 gdb::hash_enum
<sect_offset
>>
2667 debug_info_offset_to_per_cu
;
2668 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2670 const auto insertpair
2671 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2672 if (!insertpair
.second
)
2674 warning (_("Section .debug_aranges in %s has duplicate "
2675 "debug_info_offset %s, ignoring .debug_aranges."),
2676 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2681 section
->read (objfile
);
2683 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2685 const gdb_byte
*addr
= section
->buffer
;
2687 while (addr
< section
->buffer
+ section
->size
)
2689 const gdb_byte
*const entry_addr
= addr
;
2690 unsigned int bytes_read
;
2692 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2696 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2697 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2698 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2699 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2701 warning (_("Section .debug_aranges in %s entry at offset %s "
2702 "length %s exceeds section length %s, "
2703 "ignoring .debug_aranges."),
2704 objfile_name (objfile
),
2705 plongest (entry_addr
- section
->buffer
),
2706 plongest (bytes_read
+ entry_length
),
2707 pulongest (section
->size
));
2711 /* The version number. */
2712 const uint16_t version
= read_2_bytes (abfd
, addr
);
2716 warning (_("Section .debug_aranges in %s entry at offset %s "
2717 "has unsupported version %d, ignoring .debug_aranges."),
2718 objfile_name (objfile
),
2719 plongest (entry_addr
- section
->buffer
), version
);
2723 const uint64_t debug_info_offset
2724 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2725 addr
+= offset_size
;
2726 const auto per_cu_it
2727 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2728 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2730 warning (_("Section .debug_aranges in %s entry at offset %s "
2731 "debug_info_offset %s does not exists, "
2732 "ignoring .debug_aranges."),
2733 objfile_name (objfile
),
2734 plongest (entry_addr
- section
->buffer
),
2735 pulongest (debug_info_offset
));
2738 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2740 const uint8_t address_size
= *addr
++;
2741 if (address_size
< 1 || address_size
> 8)
2743 warning (_("Section .debug_aranges in %s entry at offset %s "
2744 "address_size %u is invalid, ignoring .debug_aranges."),
2745 objfile_name (objfile
),
2746 plongest (entry_addr
- section
->buffer
), address_size
);
2750 const uint8_t segment_selector_size
= *addr
++;
2751 if (segment_selector_size
!= 0)
2753 warning (_("Section .debug_aranges in %s entry at offset %s "
2754 "segment_selector_size %u is not supported, "
2755 "ignoring .debug_aranges."),
2756 objfile_name (objfile
),
2757 plongest (entry_addr
- section
->buffer
),
2758 segment_selector_size
);
2762 /* Must pad to an alignment boundary that is twice the address
2763 size. It is undocumented by the DWARF standard but GCC does
2765 for (size_t padding
= ((-(addr
- section
->buffer
))
2766 & (2 * address_size
- 1));
2767 padding
> 0; padding
--)
2770 warning (_("Section .debug_aranges in %s entry at offset %s "
2771 "padding is not zero, ignoring .debug_aranges."),
2772 objfile_name (objfile
),
2773 plongest (entry_addr
- section
->buffer
));
2779 if (addr
+ 2 * address_size
> entry_end
)
2781 warning (_("Section .debug_aranges in %s entry at offset %s "
2782 "address list is not properly terminated, "
2783 "ignoring .debug_aranges."),
2784 objfile_name (objfile
),
2785 plongest (entry_addr
- section
->buffer
));
2788 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2790 addr
+= address_size
;
2791 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2793 addr
+= address_size
;
2794 if (start
== 0 && length
== 0)
2796 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
2798 /* Symbol was eliminated due to a COMDAT group. */
2801 ULONGEST end
= start
+ length
;
2802 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2804 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2806 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2810 objfile
->partial_symtabs
->psymtabs_addrmap
2811 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2814 /* Find a slot in the mapped index INDEX for the object named NAME.
2815 If NAME is found, set *VEC_OUT to point to the CU vector in the
2816 constant pool and return true. If NAME cannot be found, return
2820 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2821 offset_type
**vec_out
)
2824 offset_type slot
, step
;
2825 int (*cmp
) (const char *, const char *);
2827 gdb::unique_xmalloc_ptr
<char> without_params
;
2828 if (current_language
->la_language
== language_cplus
2829 || current_language
->la_language
== language_fortran
2830 || current_language
->la_language
== language_d
)
2832 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2835 if (strchr (name
, '(') != NULL
)
2837 without_params
= cp_remove_params (name
);
2839 if (without_params
!= NULL
)
2840 name
= without_params
.get ();
2844 /* Index version 4 did not support case insensitive searches. But the
2845 indices for case insensitive languages are built in lowercase, therefore
2846 simulate our NAME being searched is also lowercased. */
2847 hash
= mapped_index_string_hash ((index
->version
== 4
2848 && case_sensitivity
== case_sensitive_off
2849 ? 5 : index
->version
),
2852 slot
= hash
& (index
->symbol_table
.size () - 1);
2853 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2854 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2860 const auto &bucket
= index
->symbol_table
[slot
];
2861 if (bucket
.name
== 0 && bucket
.vec
== 0)
2864 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2865 if (!cmp (name
, str
))
2867 *vec_out
= (offset_type
*) (index
->constant_pool
2868 + MAYBE_SWAP (bucket
.vec
));
2872 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2876 /* A helper function that reads the .gdb_index from BUFFER and fills
2877 in MAP. FILENAME is the name of the file containing the data;
2878 it is used for error reporting. DEPRECATED_OK is true if it is
2879 ok to use deprecated sections.
2881 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2882 out parameters that are filled in with information about the CU and
2883 TU lists in the section.
2885 Returns true if all went well, false otherwise. */
2888 read_gdb_index_from_buffer (const char *filename
,
2890 gdb::array_view
<const gdb_byte
> buffer
,
2891 struct mapped_index
*map
,
2892 const gdb_byte
**cu_list
,
2893 offset_type
*cu_list_elements
,
2894 const gdb_byte
**types_list
,
2895 offset_type
*types_list_elements
)
2897 const gdb_byte
*addr
= &buffer
[0];
2899 /* Version check. */
2900 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2901 /* Versions earlier than 3 emitted every copy of a psymbol. This
2902 causes the index to behave very poorly for certain requests. Version 3
2903 contained incomplete addrmap. So, it seems better to just ignore such
2907 static int warning_printed
= 0;
2908 if (!warning_printed
)
2910 warning (_("Skipping obsolete .gdb_index section in %s."),
2912 warning_printed
= 1;
2916 /* Index version 4 uses a different hash function than index version
2919 Versions earlier than 6 did not emit psymbols for inlined
2920 functions. Using these files will cause GDB not to be able to
2921 set breakpoints on inlined functions by name, so we ignore these
2922 indices unless the user has done
2923 "set use-deprecated-index-sections on". */
2924 if (version
< 6 && !deprecated_ok
)
2926 static int warning_printed
= 0;
2927 if (!warning_printed
)
2930 Skipping deprecated .gdb_index section in %s.\n\
2931 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2932 to use the section anyway."),
2934 warning_printed
= 1;
2938 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2939 of the TU (for symbols coming from TUs),
2940 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2941 Plus gold-generated indices can have duplicate entries for global symbols,
2942 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2943 These are just performance bugs, and we can't distinguish gdb-generated
2944 indices from gold-generated ones, so issue no warning here. */
2946 /* Indexes with higher version than the one supported by GDB may be no
2947 longer backward compatible. */
2951 map
->version
= version
;
2953 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2956 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2957 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2961 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2962 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2963 - MAYBE_SWAP (metadata
[i
]))
2967 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2968 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2970 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2973 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2974 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2976 = gdb::array_view
<mapped_index::symbol_table_slot
>
2977 ((mapped_index::symbol_table_slot
*) symbol_table
,
2978 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2981 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2986 /* Callback types for dwarf2_read_gdb_index. */
2988 typedef gdb::function_view
2989 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
2990 get_gdb_index_contents_ftype
;
2991 typedef gdb::function_view
2992 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
2993 get_gdb_index_contents_dwz_ftype
;
2995 /* Read .gdb_index. If everything went ok, initialize the "quick"
2996 elements of all the CUs and return 1. Otherwise, return 0. */
2999 dwarf2_read_gdb_index
3000 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3001 get_gdb_index_contents_ftype get_gdb_index_contents
,
3002 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3004 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3005 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3006 struct dwz_file
*dwz
;
3007 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3009 gdb::array_view
<const gdb_byte
> main_index_contents
3010 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3012 if (main_index_contents
.empty ())
3015 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3016 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3017 use_deprecated_index_sections
,
3018 main_index_contents
, map
.get (), &cu_list
,
3019 &cu_list_elements
, &types_list
,
3020 &types_list_elements
))
3023 /* Don't use the index if it's empty. */
3024 if (map
->symbol_table
.empty ())
3027 /* If there is a .dwz file, read it so we can get its CU list as
3029 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3032 struct mapped_index dwz_map
;
3033 const gdb_byte
*dwz_types_ignore
;
3034 offset_type dwz_types_elements_ignore
;
3036 gdb::array_view
<const gdb_byte
> dwz_index_content
3037 = get_gdb_index_contents_dwz (objfile
, dwz
);
3039 if (dwz_index_content
.empty ())
3042 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3043 1, dwz_index_content
, &dwz_map
,
3044 &dwz_list
, &dwz_list_elements
,
3046 &dwz_types_elements_ignore
))
3048 warning (_("could not read '.gdb_index' section from %s; skipping"),
3049 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3054 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3055 dwz_list
, dwz_list_elements
);
3057 if (types_list_elements
)
3059 /* We can only handle a single .debug_types when we have an
3061 if (dwarf2_per_objfile
->types
.size () != 1)
3064 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3066 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3067 types_list
, types_list_elements
);
3070 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3072 dwarf2_per_objfile
->index_table
= std::move (map
);
3073 dwarf2_per_objfile
->using_index
= 1;
3074 dwarf2_per_objfile
->quick_file_names_table
=
3075 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3080 /* die_reader_func for dw2_get_file_names. */
3083 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3084 const gdb_byte
*info_ptr
,
3085 struct die_info
*comp_unit_die
)
3087 struct dwarf2_cu
*cu
= reader
->cu
;
3088 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3089 struct dwarf2_per_objfile
*dwarf2_per_objfile
3090 = cu
->per_cu
->dwarf2_per_objfile
;
3091 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3092 struct dwarf2_per_cu_data
*lh_cu
;
3093 struct attribute
*attr
;
3095 struct quick_file_names
*qfn
;
3097 gdb_assert (! this_cu
->is_debug_types
);
3099 /* Our callers never want to match partial units -- instead they
3100 will match the enclosing full CU. */
3101 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3103 this_cu
->v
.quick
->no_file_data
= 1;
3111 sect_offset line_offset
{};
3113 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3114 if (attr
!= nullptr)
3116 struct quick_file_names find_entry
;
3118 line_offset
= (sect_offset
) DW_UNSND (attr
);
3120 /* We may have already read in this line header (TU line header sharing).
3121 If we have we're done. */
3122 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3123 find_entry
.hash
.line_sect_off
= line_offset
;
3124 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
.get (),
3125 &find_entry
, INSERT
);
3128 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3132 lh
= dwarf_decode_line_header (line_offset
, cu
);
3136 lh_cu
->v
.quick
->no_file_data
= 1;
3140 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3141 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3142 qfn
->hash
.line_sect_off
= line_offset
;
3143 gdb_assert (slot
!= NULL
);
3146 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3149 if (strcmp (fnd
.name
, "<unknown>") != 0)
3152 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3154 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3156 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3157 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3158 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3159 fnd
.comp_dir
).release ();
3160 qfn
->real_names
= NULL
;
3162 lh_cu
->v
.quick
->file_names
= qfn
;
3165 /* A helper for the "quick" functions which attempts to read the line
3166 table for THIS_CU. */
3168 static struct quick_file_names
*
3169 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3171 /* This should never be called for TUs. */
3172 gdb_assert (! this_cu
->is_debug_types
);
3173 /* Nor type unit groups. */
3174 gdb_assert (! this_cu
->type_unit_group_p ());
3176 if (this_cu
->v
.quick
->file_names
!= NULL
)
3177 return this_cu
->v
.quick
->file_names
;
3178 /* If we know there is no line data, no point in looking again. */
3179 if (this_cu
->v
.quick
->no_file_data
)
3182 cutu_reader
reader (this_cu
);
3183 if (!reader
.dummy_p
)
3184 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3186 if (this_cu
->v
.quick
->no_file_data
)
3188 return this_cu
->v
.quick
->file_names
;
3191 /* A helper for the "quick" functions which computes and caches the
3192 real path for a given file name from the line table. */
3195 dw2_get_real_path (struct objfile
*objfile
,
3196 struct quick_file_names
*qfn
, int index
)
3198 if (qfn
->real_names
== NULL
)
3199 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3200 qfn
->num_file_names
, const char *);
3202 if (qfn
->real_names
[index
] == NULL
)
3203 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3205 return qfn
->real_names
[index
];
3208 static struct symtab
*
3209 dw2_find_last_source_symtab (struct objfile
*objfile
)
3211 struct dwarf2_per_objfile
*dwarf2_per_objfile
3212 = get_dwarf2_per_objfile (objfile
);
3213 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3214 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3219 return compunit_primary_filetab (cust
);
3222 /* Traversal function for dw2_forget_cached_source_info. */
3225 dw2_free_cached_file_names (void **slot
, void *info
)
3227 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3229 if (file_data
->real_names
)
3233 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3235 xfree ((void*) file_data
->real_names
[i
]);
3236 file_data
->real_names
[i
] = NULL
;
3244 dw2_forget_cached_source_info (struct objfile
*objfile
)
3246 struct dwarf2_per_objfile
*dwarf2_per_objfile
3247 = get_dwarf2_per_objfile (objfile
);
3249 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
.get (),
3250 dw2_free_cached_file_names
, NULL
);
3253 /* Helper function for dw2_map_symtabs_matching_filename that expands
3254 the symtabs and calls the iterator. */
3257 dw2_map_expand_apply (struct objfile
*objfile
,
3258 struct dwarf2_per_cu_data
*per_cu
,
3259 const char *name
, const char *real_path
,
3260 gdb::function_view
<bool (symtab
*)> callback
)
3262 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3264 /* Don't visit already-expanded CUs. */
3265 if (per_cu
->v
.quick
->compunit_symtab
)
3268 /* This may expand more than one symtab, and we want to iterate over
3270 dw2_instantiate_symtab (per_cu
, false);
3272 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3273 last_made
, callback
);
3276 /* Implementation of the map_symtabs_matching_filename method. */
3279 dw2_map_symtabs_matching_filename
3280 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3281 gdb::function_view
<bool (symtab
*)> callback
)
3283 const char *name_basename
= lbasename (name
);
3284 struct dwarf2_per_objfile
*dwarf2_per_objfile
3285 = get_dwarf2_per_objfile (objfile
);
3287 /* The rule is CUs specify all the files, including those used by
3288 any TU, so there's no need to scan TUs here. */
3290 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3292 /* We only need to look at symtabs not already expanded. */
3293 if (per_cu
->v
.quick
->compunit_symtab
)
3296 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3297 if (file_data
== NULL
)
3300 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3302 const char *this_name
= file_data
->file_names
[j
];
3303 const char *this_real_name
;
3305 if (compare_filenames_for_search (this_name
, name
))
3307 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3313 /* Before we invoke realpath, which can get expensive when many
3314 files are involved, do a quick comparison of the basenames. */
3315 if (! basenames_may_differ
3316 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3319 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3320 if (compare_filenames_for_search (this_real_name
, name
))
3322 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3328 if (real_path
!= NULL
)
3330 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3331 gdb_assert (IS_ABSOLUTE_PATH (name
));
3332 if (this_real_name
!= NULL
3333 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3335 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3347 /* Struct used to manage iterating over all CUs looking for a symbol. */
3349 struct dw2_symtab_iterator
3351 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3352 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3353 /* If set, only look for symbols that match that block. Valid values are
3354 GLOBAL_BLOCK and STATIC_BLOCK. */
3355 gdb::optional
<block_enum
> block_index
;
3356 /* The kind of symbol we're looking for. */
3358 /* The list of CUs from the index entry of the symbol,
3359 or NULL if not found. */
3361 /* The next element in VEC to look at. */
3363 /* The number of elements in VEC, or zero if there is no match. */
3365 /* Have we seen a global version of the symbol?
3366 If so we can ignore all further global instances.
3367 This is to work around gold/15646, inefficient gold-generated
3372 /* Initialize the index symtab iterator ITER. */
3375 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3376 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3377 gdb::optional
<block_enum
> block_index
,
3381 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3382 iter
->block_index
= block_index
;
3383 iter
->domain
= domain
;
3385 iter
->global_seen
= 0;
3387 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3389 /* index is NULL if OBJF_READNOW. */
3390 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3391 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3399 /* Return the next matching CU or NULL if there are no more. */
3401 static struct dwarf2_per_cu_data
*
3402 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3404 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3406 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3408 offset_type cu_index_and_attrs
=
3409 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3410 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3411 gdb_index_symbol_kind symbol_kind
=
3412 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3413 /* Only check the symbol attributes if they're present.
3414 Indices prior to version 7 don't record them,
3415 and indices >= 7 may elide them for certain symbols
3416 (gold does this). */
3418 (dwarf2_per_objfile
->index_table
->version
>= 7
3419 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3421 /* Don't crash on bad data. */
3422 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3423 + dwarf2_per_objfile
->all_type_units
.size ()))
3425 complaint (_(".gdb_index entry has bad CU index"
3427 objfile_name (dwarf2_per_objfile
->objfile
));
3431 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3433 /* Skip if already read in. */
3434 if (per_cu
->v
.quick
->compunit_symtab
)
3437 /* Check static vs global. */
3440 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3442 if (iter
->block_index
.has_value ())
3444 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3446 if (is_static
!= want_static
)
3450 /* Work around gold/15646. */
3451 if (!is_static
&& iter
->global_seen
)
3454 iter
->global_seen
= 1;
3457 /* Only check the symbol's kind if it has one. */
3460 switch (iter
->domain
)
3463 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3464 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3465 /* Some types are also in VAR_DOMAIN. */
3466 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3470 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3474 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3478 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3493 static struct compunit_symtab
*
3494 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3495 const char *name
, domain_enum domain
)
3497 struct compunit_symtab
*stab_best
= NULL
;
3498 struct dwarf2_per_objfile
*dwarf2_per_objfile
3499 = get_dwarf2_per_objfile (objfile
);
3501 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3503 struct dw2_symtab_iterator iter
;
3504 struct dwarf2_per_cu_data
*per_cu
;
3506 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3508 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3510 struct symbol
*sym
, *with_opaque
= NULL
;
3511 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3512 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3513 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3515 sym
= block_find_symbol (block
, name
, domain
,
3516 block_find_non_opaque_type_preferred
,
3519 /* Some caution must be observed with overloaded functions
3520 and methods, since the index will not contain any overload
3521 information (but NAME might contain it). */
3524 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3526 if (with_opaque
!= NULL
3527 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3530 /* Keep looking through other CUs. */
3537 dw2_print_stats (struct objfile
*objfile
)
3539 struct dwarf2_per_objfile
*dwarf2_per_objfile
3540 = get_dwarf2_per_objfile (objfile
);
3541 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3542 + dwarf2_per_objfile
->all_type_units
.size ());
3545 for (int i
= 0; i
< total
; ++i
)
3547 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3549 if (!per_cu
->v
.quick
->compunit_symtab
)
3552 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3553 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3556 /* This dumps minimal information about the index.
3557 It is called via "mt print objfiles".
3558 One use is to verify .gdb_index has been loaded by the
3559 gdb.dwarf2/gdb-index.exp testcase. */
3562 dw2_dump (struct objfile
*objfile
)
3564 struct dwarf2_per_objfile
*dwarf2_per_objfile
3565 = get_dwarf2_per_objfile (objfile
);
3567 gdb_assert (dwarf2_per_objfile
->using_index
);
3568 printf_filtered (".gdb_index:");
3569 if (dwarf2_per_objfile
->index_table
!= NULL
)
3571 printf_filtered (" version %d\n",
3572 dwarf2_per_objfile
->index_table
->version
);
3575 printf_filtered (" faked for \"readnow\"\n");
3576 printf_filtered ("\n");
3580 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3581 const char *func_name
)
3583 struct dwarf2_per_objfile
*dwarf2_per_objfile
3584 = get_dwarf2_per_objfile (objfile
);
3586 struct dw2_symtab_iterator iter
;
3587 struct dwarf2_per_cu_data
*per_cu
;
3589 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3591 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3592 dw2_instantiate_symtab (per_cu
, false);
3597 dw2_expand_all_symtabs (struct objfile
*objfile
)
3599 struct dwarf2_per_objfile
*dwarf2_per_objfile
3600 = get_dwarf2_per_objfile (objfile
);
3601 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3602 + dwarf2_per_objfile
->all_type_units
.size ());
3604 for (int i
= 0; i
< total_units
; ++i
)
3606 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3608 /* We don't want to directly expand a partial CU, because if we
3609 read it with the wrong language, then assertion failures can
3610 be triggered later on. See PR symtab/23010. So, tell
3611 dw2_instantiate_symtab to skip partial CUs -- any important
3612 partial CU will be read via DW_TAG_imported_unit anyway. */
3613 dw2_instantiate_symtab (per_cu
, true);
3618 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3619 const char *fullname
)
3621 struct dwarf2_per_objfile
*dwarf2_per_objfile
3622 = get_dwarf2_per_objfile (objfile
);
3624 /* We don't need to consider type units here.
3625 This is only called for examining code, e.g. expand_line_sal.
3626 There can be an order of magnitude (or more) more type units
3627 than comp units, and we avoid them if we can. */
3629 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3631 /* We only need to look at symtabs not already expanded. */
3632 if (per_cu
->v
.quick
->compunit_symtab
)
3635 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3636 if (file_data
== NULL
)
3639 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3641 const char *this_fullname
= file_data
->file_names
[j
];
3643 if (filename_cmp (this_fullname
, fullname
) == 0)
3645 dw2_instantiate_symtab (per_cu
, false);
3653 dw2_expand_symtabs_matching_symbol
3654 (mapped_index_base
&index
,
3655 const lookup_name_info
&lookup_name_in
,
3656 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3657 enum search_domain kind
,
3658 gdb::function_view
<bool (offset_type
)> match_callback
);
3661 dw2_expand_symtabs_matching_one
3662 (struct dwarf2_per_cu_data
*per_cu
,
3663 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3664 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3667 dw2_map_matching_symbols
3668 (struct objfile
*objfile
,
3669 const lookup_name_info
&name
, domain_enum domain
,
3671 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3672 symbol_compare_ftype
*ordered_compare
)
3675 struct dwarf2_per_objfile
*dwarf2_per_objfile
3676 = get_dwarf2_per_objfile (objfile
);
3678 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3680 if (dwarf2_per_objfile
->index_table
!= nullptr)
3682 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3683 here though if the current language is Ada for a non-Ada objfile
3685 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
3687 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3688 auto matcher
= [&] (const char *symname
)
3690 if (ordered_compare
== nullptr)
3692 return ordered_compare (symname
, match_name
) == 0;
3695 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3696 [&] (offset_type namei
)
3698 struct dw2_symtab_iterator iter
;
3699 struct dwarf2_per_cu_data
*per_cu
;
3701 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_kind
, domain
,
3703 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3704 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
3710 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3711 proceed assuming all symtabs have been read in. */
3714 for (compunit_symtab
*cust
: objfile
->compunits ())
3716 const struct block
*block
;
3720 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3721 if (!iterate_over_symbols_terminated (block
, name
,
3727 /* Starting from a search name, return the string that finds the upper
3728 bound of all strings that start with SEARCH_NAME in a sorted name
3729 list. Returns the empty string to indicate that the upper bound is
3730 the end of the list. */
3733 make_sort_after_prefix_name (const char *search_name
)
3735 /* When looking to complete "func", we find the upper bound of all
3736 symbols that start with "func" by looking for where we'd insert
3737 the closest string that would follow "func" in lexicographical
3738 order. Usually, that's "func"-with-last-character-incremented,
3739 i.e. "fund". Mind non-ASCII characters, though. Usually those
3740 will be UTF-8 multi-byte sequences, but we can't be certain.
3741 Especially mind the 0xff character, which is a valid character in
3742 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3743 rule out compilers allowing it in identifiers. Note that
3744 conveniently, strcmp/strcasecmp are specified to compare
3745 characters interpreted as unsigned char. So what we do is treat
3746 the whole string as a base 256 number composed of a sequence of
3747 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3748 to 0, and carries 1 to the following more-significant position.
3749 If the very first character in SEARCH_NAME ends up incremented
3750 and carries/overflows, then the upper bound is the end of the
3751 list. The string after the empty string is also the empty
3754 Some examples of this operation:
3756 SEARCH_NAME => "+1" RESULT
3760 "\xff" "a" "\xff" => "\xff" "b"
3765 Then, with these symbols for example:
3771 completing "func" looks for symbols between "func" and
3772 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3773 which finds "func" and "func1", but not "fund".
3777 funcÿ (Latin1 'ÿ' [0xff])
3781 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3782 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3786 ÿÿ (Latin1 'ÿ' [0xff])
3789 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3790 the end of the list.
3792 std::string after
= search_name
;
3793 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3795 if (!after
.empty ())
3796 after
.back () = (unsigned char) after
.back () + 1;
3800 /* See declaration. */
3802 std::pair
<std::vector
<name_component
>::const_iterator
,
3803 std::vector
<name_component
>::const_iterator
>
3804 mapped_index_base::find_name_components_bounds
3805 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3808 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3810 const char *lang_name
3811 = lookup_name_without_params
.language_lookup_name (lang
);
3813 /* Comparison function object for lower_bound that matches against a
3814 given symbol name. */
3815 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3818 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3819 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3820 return name_cmp (elem_name
, name
) < 0;
3823 /* Comparison function object for upper_bound that matches against a
3824 given symbol name. */
3825 auto lookup_compare_upper
= [&] (const char *name
,
3826 const name_component
&elem
)
3828 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3829 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3830 return name_cmp (name
, elem_name
) < 0;
3833 auto begin
= this->name_components
.begin ();
3834 auto end
= this->name_components
.end ();
3836 /* Find the lower bound. */
3839 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3842 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3845 /* Find the upper bound. */
3848 if (lookup_name_without_params
.completion_mode ())
3850 /* In completion mode, we want UPPER to point past all
3851 symbols names that have the same prefix. I.e., with
3852 these symbols, and completing "func":
3854 function << lower bound
3856 other_function << upper bound
3858 We find the upper bound by looking for the insertion
3859 point of "func"-with-last-character-incremented,
3861 std::string after
= make_sort_after_prefix_name (lang_name
);
3864 return std::lower_bound (lower
, end
, after
.c_str (),
3865 lookup_compare_lower
);
3868 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3871 return {lower
, upper
};
3874 /* See declaration. */
3877 mapped_index_base::build_name_components ()
3879 if (!this->name_components
.empty ())
3882 this->name_components_casing
= case_sensitivity
;
3884 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3886 /* The code below only knows how to break apart components of C++
3887 symbol names (and other languages that use '::' as
3888 namespace/module separator) and Ada symbol names. */
3889 auto count
= this->symbol_name_count ();
3890 for (offset_type idx
= 0; idx
< count
; idx
++)
3892 if (this->symbol_name_slot_invalid (idx
))
3895 const char *name
= this->symbol_name_at (idx
);
3897 /* Add each name component to the name component table. */
3898 unsigned int previous_len
= 0;
3900 if (strstr (name
, "::") != nullptr)
3902 for (unsigned int current_len
= cp_find_first_component (name
);
3903 name
[current_len
] != '\0';
3904 current_len
+= cp_find_first_component (name
+ current_len
))
3906 gdb_assert (name
[current_len
] == ':');
3907 this->name_components
.push_back ({previous_len
, idx
});
3908 /* Skip the '::'. */
3910 previous_len
= current_len
;
3915 /* Handle the Ada encoded (aka mangled) form here. */
3916 for (const char *iter
= strstr (name
, "__");
3918 iter
= strstr (iter
, "__"))
3920 this->name_components
.push_back ({previous_len
, idx
});
3922 previous_len
= iter
- name
;
3926 this->name_components
.push_back ({previous_len
, idx
});
3929 /* Sort name_components elements by name. */
3930 auto name_comp_compare
= [&] (const name_component
&left
,
3931 const name_component
&right
)
3933 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3934 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3936 const char *left_name
= left_qualified
+ left
.name_offset
;
3937 const char *right_name
= right_qualified
+ right
.name_offset
;
3939 return name_cmp (left_name
, right_name
) < 0;
3942 std::sort (this->name_components
.begin (),
3943 this->name_components
.end (),
3947 /* Helper for dw2_expand_symtabs_matching that works with a
3948 mapped_index_base instead of the containing objfile. This is split
3949 to a separate function in order to be able to unit test the
3950 name_components matching using a mock mapped_index_base. For each
3951 symbol name that matches, calls MATCH_CALLBACK, passing it the
3952 symbol's index in the mapped_index_base symbol table. */
3955 dw2_expand_symtabs_matching_symbol
3956 (mapped_index_base
&index
,
3957 const lookup_name_info
&lookup_name_in
,
3958 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3959 enum search_domain kind
,
3960 gdb::function_view
<bool (offset_type
)> match_callback
)
3962 lookup_name_info lookup_name_without_params
3963 = lookup_name_in
.make_ignore_params ();
3965 /* Build the symbol name component sorted vector, if we haven't
3967 index
.build_name_components ();
3969 /* The same symbol may appear more than once in the range though.
3970 E.g., if we're looking for symbols that complete "w", and we have
3971 a symbol named "w1::w2", we'll find the two name components for
3972 that same symbol in the range. To be sure we only call the
3973 callback once per symbol, we first collect the symbol name
3974 indexes that matched in a temporary vector and ignore
3976 std::vector
<offset_type
> matches
;
3978 struct name_and_matcher
3980 symbol_name_matcher_ftype
*matcher
;
3983 bool operator== (const name_and_matcher
&other
) const
3985 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
3989 /* A vector holding all the different symbol name matchers, for all
3991 std::vector
<name_and_matcher
> matchers
;
3993 for (int i
= 0; i
< nr_languages
; i
++)
3995 enum language lang_e
= (enum language
) i
;
3997 const language_defn
*lang
= language_def (lang_e
);
3998 symbol_name_matcher_ftype
*name_matcher
3999 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4001 name_and_matcher key
{
4003 lookup_name_without_params
.language_lookup_name (lang_e
)
4006 /* Don't insert the same comparison routine more than once.
4007 Note that we do this linear walk. This is not a problem in
4008 practice because the number of supported languages is
4010 if (std::find (matchers
.begin (), matchers
.end (), key
)
4013 matchers
.push_back (std::move (key
));
4016 = index
.find_name_components_bounds (lookup_name_without_params
,
4019 /* Now for each symbol name in range, check to see if we have a name
4020 match, and if so, call the MATCH_CALLBACK callback. */
4022 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4024 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4026 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4027 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4030 matches
.push_back (bounds
.first
->idx
);
4034 std::sort (matches
.begin (), matches
.end ());
4036 /* Finally call the callback, once per match. */
4038 for (offset_type idx
: matches
)
4042 if (!match_callback (idx
))
4048 /* Above we use a type wider than idx's for 'prev', since 0 and
4049 (offset_type)-1 are both possible values. */
4050 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4055 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4057 /* A mock .gdb_index/.debug_names-like name index table, enough to
4058 exercise dw2_expand_symtabs_matching_symbol, which works with the
4059 mapped_index_base interface. Builds an index from the symbol list
4060 passed as parameter to the constructor. */
4061 class mock_mapped_index
: public mapped_index_base
4064 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4065 : m_symbol_table (symbols
)
4068 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4070 /* Return the number of names in the symbol table. */
4071 size_t symbol_name_count () const override
4073 return m_symbol_table
.size ();
4076 /* Get the name of the symbol at IDX in the symbol table. */
4077 const char *symbol_name_at (offset_type idx
) const override
4079 return m_symbol_table
[idx
];
4083 gdb::array_view
<const char *> m_symbol_table
;
4086 /* Convenience function that converts a NULL pointer to a "<null>"
4087 string, to pass to print routines. */
4090 string_or_null (const char *str
)
4092 return str
!= NULL
? str
: "<null>";
4095 /* Check if a lookup_name_info built from
4096 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4097 index. EXPECTED_LIST is the list of expected matches, in expected
4098 matching order. If no match expected, then an empty list is
4099 specified. Returns true on success. On failure prints a warning
4100 indicating the file:line that failed, and returns false. */
4103 check_match (const char *file
, int line
,
4104 mock_mapped_index
&mock_index
,
4105 const char *name
, symbol_name_match_type match_type
,
4106 bool completion_mode
,
4107 std::initializer_list
<const char *> expected_list
)
4109 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4111 bool matched
= true;
4113 auto mismatch
= [&] (const char *expected_str
,
4116 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4117 "expected=\"%s\", got=\"%s\"\n"),
4119 (match_type
== symbol_name_match_type::FULL
4121 name
, string_or_null (expected_str
), string_or_null (got
));
4125 auto expected_it
= expected_list
.begin ();
4126 auto expected_end
= expected_list
.end ();
4128 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4130 [&] (offset_type idx
)
4132 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4133 const char *expected_str
4134 = expected_it
== expected_end
? NULL
: *expected_it
++;
4136 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4137 mismatch (expected_str
, matched_name
);
4141 const char *expected_str
4142 = expected_it
== expected_end
? NULL
: *expected_it
++;
4143 if (expected_str
!= NULL
)
4144 mismatch (expected_str
, NULL
);
4149 /* The symbols added to the mock mapped_index for testing (in
4151 static const char *test_symbols
[] = {
4160 "ns2::tmpl<int>::foo2",
4161 "(anonymous namespace)::A::B::C",
4163 /* These are used to check that the increment-last-char in the
4164 matching algorithm for completion doesn't match "t1_fund" when
4165 completing "t1_func". */
4171 /* A UTF-8 name with multi-byte sequences to make sure that
4172 cp-name-parser understands this as a single identifier ("função"
4173 is "function" in PT). */
4176 /* \377 (0xff) is Latin1 'ÿ'. */
4179 /* \377 (0xff) is Latin1 'ÿ'. */
4183 /* A name with all sorts of complications. Starts with "z" to make
4184 it easier for the completion tests below. */
4185 #define Z_SYM_NAME \
4186 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4187 "::tuple<(anonymous namespace)::ui*, " \
4188 "std::default_delete<(anonymous namespace)::ui>, void>"
4193 /* Returns true if the mapped_index_base::find_name_component_bounds
4194 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4195 in completion mode. */
4198 check_find_bounds_finds (mapped_index_base
&index
,
4199 const char *search_name
,
4200 gdb::array_view
<const char *> expected_syms
)
4202 lookup_name_info
lookup_name (search_name
,
4203 symbol_name_match_type::FULL
, true);
4205 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4208 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4209 if (distance
!= expected_syms
.size ())
4212 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4214 auto nc_elem
= bounds
.first
+ exp_elem
;
4215 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4216 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4223 /* Test the lower-level mapped_index::find_name_component_bounds
4227 test_mapped_index_find_name_component_bounds ()
4229 mock_mapped_index
mock_index (test_symbols
);
4231 mock_index
.build_name_components ();
4233 /* Test the lower-level mapped_index::find_name_component_bounds
4234 method in completion mode. */
4236 static const char *expected_syms
[] = {
4241 SELF_CHECK (check_find_bounds_finds (mock_index
,
4242 "t1_func", expected_syms
));
4245 /* Check that the increment-last-char in the name matching algorithm
4246 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4248 static const char *expected_syms1
[] = {
4252 SELF_CHECK (check_find_bounds_finds (mock_index
,
4253 "\377", expected_syms1
));
4255 static const char *expected_syms2
[] = {
4258 SELF_CHECK (check_find_bounds_finds (mock_index
,
4259 "\377\377", expected_syms2
));
4263 /* Test dw2_expand_symtabs_matching_symbol. */
4266 test_dw2_expand_symtabs_matching_symbol ()
4268 mock_mapped_index
mock_index (test_symbols
);
4270 /* We let all tests run until the end even if some fails, for debug
4272 bool any_mismatch
= false;
4274 /* Create the expected symbols list (an initializer_list). Needed
4275 because lists have commas, and we need to pass them to CHECK,
4276 which is a macro. */
4277 #define EXPECT(...) { __VA_ARGS__ }
4279 /* Wrapper for check_match that passes down the current
4280 __FILE__/__LINE__. */
4281 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4282 any_mismatch |= !check_match (__FILE__, __LINE__, \
4284 NAME, MATCH_TYPE, COMPLETION_MODE, \
4287 /* Identity checks. */
4288 for (const char *sym
: test_symbols
)
4290 /* Should be able to match all existing symbols. */
4291 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4294 /* Should be able to match all existing symbols with
4296 std::string with_params
= std::string (sym
) + "(int)";
4297 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4300 /* Should be able to match all existing symbols with
4301 parameters and qualifiers. */
4302 with_params
= std::string (sym
) + " ( int ) const";
4303 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4306 /* This should really find sym, but cp-name-parser.y doesn't
4307 know about lvalue/rvalue qualifiers yet. */
4308 with_params
= std::string (sym
) + " ( int ) &&";
4309 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4313 /* Check that the name matching algorithm for completion doesn't get
4314 confused with Latin1 'ÿ' / 0xff. */
4316 static const char str
[] = "\377";
4317 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4318 EXPECT ("\377", "\377\377123"));
4321 /* Check that the increment-last-char in the matching algorithm for
4322 completion doesn't match "t1_fund" when completing "t1_func". */
4324 static const char str
[] = "t1_func";
4325 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4326 EXPECT ("t1_func", "t1_func1"));
4329 /* Check that completion mode works at each prefix of the expected
4332 static const char str
[] = "function(int)";
4333 size_t len
= strlen (str
);
4336 for (size_t i
= 1; i
< len
; i
++)
4338 lookup
.assign (str
, i
);
4339 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4340 EXPECT ("function"));
4344 /* While "w" is a prefix of both components, the match function
4345 should still only be called once. */
4347 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4349 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4353 /* Same, with a "complicated" symbol. */
4355 static const char str
[] = Z_SYM_NAME
;
4356 size_t len
= strlen (str
);
4359 for (size_t i
= 1; i
< len
; i
++)
4361 lookup
.assign (str
, i
);
4362 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4363 EXPECT (Z_SYM_NAME
));
4367 /* In FULL mode, an incomplete symbol doesn't match. */
4369 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4373 /* A complete symbol with parameters matches any overload, since the
4374 index has no overload info. */
4376 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4377 EXPECT ("std::zfunction", "std::zfunction2"));
4378 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4379 EXPECT ("std::zfunction", "std::zfunction2"));
4380 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4381 EXPECT ("std::zfunction", "std::zfunction2"));
4384 /* Check that whitespace is ignored appropriately. A symbol with a
4385 template argument list. */
4387 static const char expected
[] = "ns::foo<int>";
4388 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4390 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4394 /* Check that whitespace is ignored appropriately. A symbol with a
4395 template argument list that includes a pointer. */
4397 static const char expected
[] = "ns::foo<char*>";
4398 /* Try both completion and non-completion modes. */
4399 static const bool completion_mode
[2] = {false, true};
4400 for (size_t i
= 0; i
< 2; i
++)
4402 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4403 completion_mode
[i
], EXPECT (expected
));
4404 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4405 completion_mode
[i
], EXPECT (expected
));
4407 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4408 completion_mode
[i
], EXPECT (expected
));
4409 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4410 completion_mode
[i
], EXPECT (expected
));
4415 /* Check method qualifiers are ignored. */
4416 static const char expected
[] = "ns::foo<char*>";
4417 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4418 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4419 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4420 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4421 CHECK_MATCH ("foo < char * > ( int ) const",
4422 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4423 CHECK_MATCH ("foo < char * > ( int ) &&",
4424 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4427 /* Test lookup names that don't match anything. */
4429 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4432 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4436 /* Some wild matching tests, exercising "(anonymous namespace)",
4437 which should not be confused with a parameter list. */
4439 static const char *syms
[] = {
4443 "A :: B :: C ( int )",
4448 for (const char *s
: syms
)
4450 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4451 EXPECT ("(anonymous namespace)::A::B::C"));
4456 static const char expected
[] = "ns2::tmpl<int>::foo2";
4457 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4459 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4463 SELF_CHECK (!any_mismatch
);
4472 test_mapped_index_find_name_component_bounds ();
4473 test_dw2_expand_symtabs_matching_symbol ();
4476 }} // namespace selftests::dw2_expand_symtabs_matching
4478 #endif /* GDB_SELF_TEST */
4480 /* If FILE_MATCHER is NULL or if PER_CU has
4481 dwarf2_per_cu_quick_data::MARK set (see
4482 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4483 EXPANSION_NOTIFY on it. */
4486 dw2_expand_symtabs_matching_one
4487 (struct dwarf2_per_cu_data
*per_cu
,
4488 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4489 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4491 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4493 bool symtab_was_null
4494 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4496 dw2_instantiate_symtab (per_cu
, false);
4498 if (expansion_notify
!= NULL
4500 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4501 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4505 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4506 matched, to expand corresponding CUs that were marked. IDX is the
4507 index of the symbol name that matched. */
4510 dw2_expand_marked_cus
4511 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4512 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4513 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4516 offset_type
*vec
, vec_len
, vec_idx
;
4517 bool global_seen
= false;
4518 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4520 vec
= (offset_type
*) (index
.constant_pool
4521 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4522 vec_len
= MAYBE_SWAP (vec
[0]);
4523 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4525 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4526 /* This value is only valid for index versions >= 7. */
4527 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4528 gdb_index_symbol_kind symbol_kind
=
4529 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4530 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4531 /* Only check the symbol attributes if they're present.
4532 Indices prior to version 7 don't record them,
4533 and indices >= 7 may elide them for certain symbols
4534 (gold does this). */
4537 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4539 /* Work around gold/15646. */
4542 if (!is_static
&& global_seen
)
4548 /* Only check the symbol's kind if it has one. */
4553 case VARIABLES_DOMAIN
:
4554 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4557 case FUNCTIONS_DOMAIN
:
4558 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4562 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4565 case MODULES_DOMAIN
:
4566 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4574 /* Don't crash on bad data. */
4575 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4576 + dwarf2_per_objfile
->all_type_units
.size ()))
4578 complaint (_(".gdb_index entry has bad CU index"
4580 objfile_name (dwarf2_per_objfile
->objfile
));
4584 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4585 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4590 /* If FILE_MATCHER is non-NULL, set all the
4591 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4592 that match FILE_MATCHER. */
4595 dw_expand_symtabs_matching_file_matcher
4596 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4597 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4599 if (file_matcher
== NULL
)
4602 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4604 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4606 NULL
, xcalloc
, xfree
));
4607 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4609 NULL
, xcalloc
, xfree
));
4611 /* The rule is CUs specify all the files, including those used by
4612 any TU, so there's no need to scan TUs here. */
4614 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4618 per_cu
->v
.quick
->mark
= 0;
4620 /* We only need to look at symtabs not already expanded. */
4621 if (per_cu
->v
.quick
->compunit_symtab
)
4624 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4625 if (file_data
== NULL
)
4628 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4630 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4632 per_cu
->v
.quick
->mark
= 1;
4636 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4638 const char *this_real_name
;
4640 if (file_matcher (file_data
->file_names
[j
], false))
4642 per_cu
->v
.quick
->mark
= 1;
4646 /* Before we invoke realpath, which can get expensive when many
4647 files are involved, do a quick comparison of the basenames. */
4648 if (!basenames_may_differ
4649 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4653 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4654 if (file_matcher (this_real_name
, false))
4656 per_cu
->v
.quick
->mark
= 1;
4661 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4662 ? visited_found
.get ()
4663 : visited_not_found
.get (),
4670 dw2_expand_symtabs_matching
4671 (struct objfile
*objfile
,
4672 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4673 const lookup_name_info
*lookup_name
,
4674 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4675 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4676 enum search_domain kind
)
4678 struct dwarf2_per_objfile
*dwarf2_per_objfile
4679 = get_dwarf2_per_objfile (objfile
);
4681 /* index_table is NULL if OBJF_READNOW. */
4682 if (!dwarf2_per_objfile
->index_table
)
4685 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4687 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4689 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4693 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4699 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4701 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4703 kind
, [&] (offset_type idx
)
4705 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4706 expansion_notify
, kind
);
4711 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4714 static struct compunit_symtab
*
4715 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4720 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4721 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4724 if (cust
->includes
== NULL
)
4727 for (i
= 0; cust
->includes
[i
]; ++i
)
4729 struct compunit_symtab
*s
= cust
->includes
[i
];
4731 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4739 static struct compunit_symtab
*
4740 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4741 struct bound_minimal_symbol msymbol
,
4743 struct obj_section
*section
,
4746 struct dwarf2_per_cu_data
*data
;
4747 struct compunit_symtab
*result
;
4749 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4752 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4753 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4754 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4758 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4759 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4760 paddress (objfile
->arch (), pc
));
4763 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4766 gdb_assert (result
!= NULL
);
4771 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4772 void *data
, int need_fullname
)
4774 struct dwarf2_per_objfile
*dwarf2_per_objfile
4775 = get_dwarf2_per_objfile (objfile
);
4777 if (!dwarf2_per_objfile
->filenames_cache
)
4779 dwarf2_per_objfile
->filenames_cache
.emplace ();
4781 htab_up
visited (htab_create_alloc (10,
4782 htab_hash_pointer
, htab_eq_pointer
,
4783 NULL
, xcalloc
, xfree
));
4785 /* The rule is CUs specify all the files, including those used
4786 by any TU, so there's no need to scan TUs here. We can
4787 ignore file names coming from already-expanded CUs. */
4789 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4791 if (per_cu
->v
.quick
->compunit_symtab
)
4793 void **slot
= htab_find_slot (visited
.get (),
4794 per_cu
->v
.quick
->file_names
,
4797 *slot
= per_cu
->v
.quick
->file_names
;
4801 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4803 /* We only need to look at symtabs not already expanded. */
4804 if (per_cu
->v
.quick
->compunit_symtab
)
4807 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4808 if (file_data
== NULL
)
4811 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4814 /* Already visited. */
4819 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4821 const char *filename
= file_data
->file_names
[j
];
4822 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4827 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4829 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4832 this_real_name
= gdb_realpath (filename
);
4833 (*fun
) (filename
, this_real_name
.get (), data
);
4838 dw2_has_symbols (struct objfile
*objfile
)
4843 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4846 dw2_find_last_source_symtab
,
4847 dw2_forget_cached_source_info
,
4848 dw2_map_symtabs_matching_filename
,
4853 dw2_expand_symtabs_for_function
,
4854 dw2_expand_all_symtabs
,
4855 dw2_expand_symtabs_with_fullname
,
4856 dw2_map_matching_symbols
,
4857 dw2_expand_symtabs_matching
,
4858 dw2_find_pc_sect_compunit_symtab
,
4860 dw2_map_symbol_filenames
4863 /* DWARF-5 debug_names reader. */
4865 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4866 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4868 /* A helper function that reads the .debug_names section in SECTION
4869 and fills in MAP. FILENAME is the name of the file containing the
4870 section; it is used for error reporting.
4872 Returns true if all went well, false otherwise. */
4875 read_debug_names_from_section (struct objfile
*objfile
,
4876 const char *filename
,
4877 struct dwarf2_section_info
*section
,
4878 mapped_debug_names
&map
)
4880 if (section
->empty ())
4883 /* Older elfutils strip versions could keep the section in the main
4884 executable while splitting it for the separate debug info file. */
4885 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4888 section
->read (objfile
);
4890 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4892 const gdb_byte
*addr
= section
->buffer
;
4894 bfd
*const abfd
= section
->get_bfd_owner ();
4896 unsigned int bytes_read
;
4897 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4900 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4901 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4902 if (bytes_read
+ length
!= section
->size
)
4904 /* There may be multiple per-CU indices. */
4905 warning (_("Section .debug_names in %s length %s does not match "
4906 "section length %s, ignoring .debug_names."),
4907 filename
, plongest (bytes_read
+ length
),
4908 pulongest (section
->size
));
4912 /* The version number. */
4913 uint16_t version
= read_2_bytes (abfd
, addr
);
4917 warning (_("Section .debug_names in %s has unsupported version %d, "
4918 "ignoring .debug_names."),
4924 uint16_t padding
= read_2_bytes (abfd
, addr
);
4928 warning (_("Section .debug_names in %s has unsupported padding %d, "
4929 "ignoring .debug_names."),
4934 /* comp_unit_count - The number of CUs in the CU list. */
4935 map
.cu_count
= read_4_bytes (abfd
, addr
);
4938 /* local_type_unit_count - The number of TUs in the local TU
4940 map
.tu_count
= read_4_bytes (abfd
, addr
);
4943 /* foreign_type_unit_count - The number of TUs in the foreign TU
4945 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4947 if (foreign_tu_count
!= 0)
4949 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4950 "ignoring .debug_names."),
4951 filename
, static_cast<unsigned long> (foreign_tu_count
));
4955 /* bucket_count - The number of hash buckets in the hash lookup
4957 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4960 /* name_count - The number of unique names in the index. */
4961 map
.name_count
= read_4_bytes (abfd
, addr
);
4964 /* abbrev_table_size - The size in bytes of the abbreviations
4966 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4969 /* augmentation_string_size - The size in bytes of the augmentation
4970 string. This value is rounded up to a multiple of 4. */
4971 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4973 map
.augmentation_is_gdb
= ((augmentation_string_size
4974 == sizeof (dwarf5_augmentation
))
4975 && memcmp (addr
, dwarf5_augmentation
,
4976 sizeof (dwarf5_augmentation
)) == 0);
4977 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4978 addr
+= augmentation_string_size
;
4981 map
.cu_table_reordered
= addr
;
4982 addr
+= map
.cu_count
* map
.offset_size
;
4984 /* List of Local TUs */
4985 map
.tu_table_reordered
= addr
;
4986 addr
+= map
.tu_count
* map
.offset_size
;
4988 /* Hash Lookup Table */
4989 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4990 addr
+= map
.bucket_count
* 4;
4991 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4992 addr
+= map
.name_count
* 4;
4995 map
.name_table_string_offs_reordered
= addr
;
4996 addr
+= map
.name_count
* map
.offset_size
;
4997 map
.name_table_entry_offs_reordered
= addr
;
4998 addr
+= map
.name_count
* map
.offset_size
;
5000 const gdb_byte
*abbrev_table_start
= addr
;
5003 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5008 const auto insertpair
5009 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5010 if (!insertpair
.second
)
5012 warning (_("Section .debug_names in %s has duplicate index %s, "
5013 "ignoring .debug_names."),
5014 filename
, pulongest (index_num
));
5017 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5018 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5023 mapped_debug_names::index_val::attr attr
;
5024 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5026 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5028 if (attr
.form
== DW_FORM_implicit_const
)
5030 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5034 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5036 indexval
.attr_vec
.push_back (std::move (attr
));
5039 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5041 warning (_("Section .debug_names in %s has abbreviation_table "
5042 "of size %s vs. written as %u, ignoring .debug_names."),
5043 filename
, plongest (addr
- abbrev_table_start
),
5047 map
.entry_pool
= addr
;
5052 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5056 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5057 const mapped_debug_names
&map
,
5058 dwarf2_section_info
§ion
,
5061 if (!map
.augmentation_is_gdb
)
5063 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5065 sect_offset sect_off
5066 = (sect_offset
) (extract_unsigned_integer
5067 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5069 map
.dwarf5_byte_order
));
5070 /* We don't know the length of the CU, because the CU list in a
5071 .debug_names index can be incomplete, so we can't use the start of
5072 the next CU as end of this CU. We create the CUs here with length 0,
5073 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5074 dwarf2_per_cu_data
*per_cu
5075 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5077 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5081 sect_offset sect_off_prev
;
5082 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5084 sect_offset sect_off_next
;
5085 if (i
< map
.cu_count
)
5088 = (sect_offset
) (extract_unsigned_integer
5089 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5091 map
.dwarf5_byte_order
));
5094 sect_off_next
= (sect_offset
) section
.size
;
5097 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5098 dwarf2_per_cu_data
*per_cu
5099 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5100 sect_off_prev
, length
);
5101 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5103 sect_off_prev
= sect_off_next
;
5107 /* Read the CU list from the mapped index, and use it to create all
5108 the CU objects for this dwarf2_per_objfile. */
5111 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5112 const mapped_debug_names
&map
,
5113 const mapped_debug_names
&dwz_map
)
5115 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5116 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5118 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5119 dwarf2_per_objfile
->info
,
5120 false /* is_dwz */);
5122 if (dwz_map
.cu_count
== 0)
5125 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5126 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5130 /* Read .debug_names. If everything went ok, initialize the "quick"
5131 elements of all the CUs and return true. Otherwise, return false. */
5134 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5136 std::unique_ptr
<mapped_debug_names
> map
5137 (new mapped_debug_names (dwarf2_per_objfile
));
5138 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5139 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5141 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5142 &dwarf2_per_objfile
->debug_names
,
5146 /* Don't use the index if it's empty. */
5147 if (map
->name_count
== 0)
5150 /* If there is a .dwz file, read it so we can get its CU list as
5152 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5155 if (!read_debug_names_from_section (objfile
,
5156 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5157 &dwz
->debug_names
, dwz_map
))
5159 warning (_("could not read '.debug_names' section from %s; skipping"),
5160 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5165 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5167 if (map
->tu_count
!= 0)
5169 /* We can only handle a single .debug_types when we have an
5171 if (dwarf2_per_objfile
->types
.size () != 1)
5174 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5176 create_signatured_type_table_from_debug_names
5177 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5180 create_addrmap_from_aranges (dwarf2_per_objfile
,
5181 &dwarf2_per_objfile
->debug_aranges
);
5183 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5184 dwarf2_per_objfile
->using_index
= 1;
5185 dwarf2_per_objfile
->quick_file_names_table
=
5186 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5191 /* Type used to manage iterating over all CUs looking for a symbol for
5194 class dw2_debug_names_iterator
5197 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5198 gdb::optional
<block_enum
> block_index
,
5201 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5202 m_addr (find_vec_in_debug_names (map
, name
))
5205 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5206 search_domain search
, uint32_t namei
)
5209 m_addr (find_vec_in_debug_names (map
, namei
))
5212 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5213 block_enum block_index
, domain_enum domain
,
5215 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5216 m_addr (find_vec_in_debug_names (map
, namei
))
5219 /* Return the next matching CU or NULL if there are no more. */
5220 dwarf2_per_cu_data
*next ();
5223 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5225 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5228 /* The internalized form of .debug_names. */
5229 const mapped_debug_names
&m_map
;
5231 /* If set, only look for symbols that match that block. Valid values are
5232 GLOBAL_BLOCK and STATIC_BLOCK. */
5233 const gdb::optional
<block_enum
> m_block_index
;
5235 /* The kind of symbol we're looking for. */
5236 const domain_enum m_domain
= UNDEF_DOMAIN
;
5237 const search_domain m_search
= ALL_DOMAIN
;
5239 /* The list of CUs from the index entry of the symbol, or NULL if
5241 const gdb_byte
*m_addr
;
5245 mapped_debug_names::namei_to_name (uint32_t namei
) const
5247 const ULONGEST namei_string_offs
5248 = extract_unsigned_integer ((name_table_string_offs_reordered
5249 + namei
* offset_size
),
5252 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5256 /* Find a slot in .debug_names for the object named NAME. If NAME is
5257 found, return pointer to its pool data. If NAME cannot be found,
5261 dw2_debug_names_iterator::find_vec_in_debug_names
5262 (const mapped_debug_names
&map
, const char *name
)
5264 int (*cmp
) (const char *, const char *);
5266 gdb::unique_xmalloc_ptr
<char> without_params
;
5267 if (current_language
->la_language
== language_cplus
5268 || current_language
->la_language
== language_fortran
5269 || current_language
->la_language
== language_d
)
5271 /* NAME is already canonical. Drop any qualifiers as
5272 .debug_names does not contain any. */
5274 if (strchr (name
, '(') != NULL
)
5276 without_params
= cp_remove_params (name
);
5277 if (without_params
!= NULL
)
5278 name
= without_params
.get ();
5282 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5284 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5286 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5287 (map
.bucket_table_reordered
5288 + (full_hash
% map
.bucket_count
)), 4,
5289 map
.dwarf5_byte_order
);
5293 if (namei
>= map
.name_count
)
5295 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5297 namei
, map
.name_count
,
5298 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5304 const uint32_t namei_full_hash
5305 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5306 (map
.hash_table_reordered
+ namei
), 4,
5307 map
.dwarf5_byte_order
);
5308 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5311 if (full_hash
== namei_full_hash
)
5313 const char *const namei_string
= map
.namei_to_name (namei
);
5315 #if 0 /* An expensive sanity check. */
5316 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5318 complaint (_("Wrong .debug_names hash for string at index %u "
5320 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5325 if (cmp (namei_string
, name
) == 0)
5327 const ULONGEST namei_entry_offs
5328 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5329 + namei
* map
.offset_size
),
5330 map
.offset_size
, map
.dwarf5_byte_order
);
5331 return map
.entry_pool
+ namei_entry_offs
;
5336 if (namei
>= map
.name_count
)
5342 dw2_debug_names_iterator::find_vec_in_debug_names
5343 (const mapped_debug_names
&map
, uint32_t namei
)
5345 if (namei
>= map
.name_count
)
5347 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5349 namei
, map
.name_count
,
5350 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5354 const ULONGEST namei_entry_offs
5355 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5356 + namei
* map
.offset_size
),
5357 map
.offset_size
, map
.dwarf5_byte_order
);
5358 return map
.entry_pool
+ namei_entry_offs
;
5361 /* See dw2_debug_names_iterator. */
5363 dwarf2_per_cu_data
*
5364 dw2_debug_names_iterator::next ()
5369 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5370 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5371 bfd
*const abfd
= objfile
->obfd
;
5375 unsigned int bytes_read
;
5376 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5377 m_addr
+= bytes_read
;
5381 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5382 if (indexval_it
== m_map
.abbrev_map
.cend ())
5384 complaint (_("Wrong .debug_names undefined abbrev code %s "
5386 pulongest (abbrev
), objfile_name (objfile
));
5389 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5390 enum class symbol_linkage
{
5394 } symbol_linkage_
= symbol_linkage::unknown
;
5395 dwarf2_per_cu_data
*per_cu
= NULL
;
5396 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5401 case DW_FORM_implicit_const
:
5402 ull
= attr
.implicit_const
;
5404 case DW_FORM_flag_present
:
5408 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5409 m_addr
+= bytes_read
;
5412 ull
= read_4_bytes (abfd
, m_addr
);
5416 ull
= read_8_bytes (abfd
, m_addr
);
5419 case DW_FORM_ref_sig8
:
5420 ull
= read_8_bytes (abfd
, m_addr
);
5424 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5425 dwarf_form_name (attr
.form
),
5426 objfile_name (objfile
));
5429 switch (attr
.dw_idx
)
5431 case DW_IDX_compile_unit
:
5432 /* Don't crash on bad data. */
5433 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5435 complaint (_(".debug_names entry has bad CU index %s"
5438 objfile_name (dwarf2_per_objfile
->objfile
));
5441 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5443 case DW_IDX_type_unit
:
5444 /* Don't crash on bad data. */
5445 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5447 complaint (_(".debug_names entry has bad TU index %s"
5450 objfile_name (dwarf2_per_objfile
->objfile
));
5453 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5455 case DW_IDX_die_offset
:
5456 /* In a per-CU index (as opposed to a per-module index), index
5457 entries without CU attribute implicitly refer to the single CU. */
5459 per_cu
= dwarf2_per_objfile
->get_cu (0);
5461 case DW_IDX_GNU_internal
:
5462 if (!m_map
.augmentation_is_gdb
)
5464 symbol_linkage_
= symbol_linkage::static_
;
5466 case DW_IDX_GNU_external
:
5467 if (!m_map
.augmentation_is_gdb
)
5469 symbol_linkage_
= symbol_linkage::extern_
;
5474 /* Skip if already read in. */
5475 if (per_cu
->v
.quick
->compunit_symtab
)
5478 /* Check static vs global. */
5479 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5481 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5482 const bool symbol_is_static
=
5483 symbol_linkage_
== symbol_linkage::static_
;
5484 if (want_static
!= symbol_is_static
)
5488 /* Match dw2_symtab_iter_next, symbol_kind
5489 and debug_names::psymbol_tag. */
5493 switch (indexval
.dwarf_tag
)
5495 case DW_TAG_variable
:
5496 case DW_TAG_subprogram
:
5497 /* Some types are also in VAR_DOMAIN. */
5498 case DW_TAG_typedef
:
5499 case DW_TAG_structure_type
:
5506 switch (indexval
.dwarf_tag
)
5508 case DW_TAG_typedef
:
5509 case DW_TAG_structure_type
:
5516 switch (indexval
.dwarf_tag
)
5519 case DW_TAG_variable
:
5526 switch (indexval
.dwarf_tag
)
5538 /* Match dw2_expand_symtabs_matching, symbol_kind and
5539 debug_names::psymbol_tag. */
5542 case VARIABLES_DOMAIN
:
5543 switch (indexval
.dwarf_tag
)
5545 case DW_TAG_variable
:
5551 case FUNCTIONS_DOMAIN
:
5552 switch (indexval
.dwarf_tag
)
5554 case DW_TAG_subprogram
:
5561 switch (indexval
.dwarf_tag
)
5563 case DW_TAG_typedef
:
5564 case DW_TAG_structure_type
:
5570 case MODULES_DOMAIN
:
5571 switch (indexval
.dwarf_tag
)
5585 static struct compunit_symtab
*
5586 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5587 const char *name
, domain_enum domain
)
5589 struct dwarf2_per_objfile
*dwarf2_per_objfile
5590 = get_dwarf2_per_objfile (objfile
);
5592 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5595 /* index is NULL if OBJF_READNOW. */
5598 const auto &map
= *mapp
;
5600 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5602 struct compunit_symtab
*stab_best
= NULL
;
5603 struct dwarf2_per_cu_data
*per_cu
;
5604 while ((per_cu
= iter
.next ()) != NULL
)
5606 struct symbol
*sym
, *with_opaque
= NULL
;
5607 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5608 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5609 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5611 sym
= block_find_symbol (block
, name
, domain
,
5612 block_find_non_opaque_type_preferred
,
5615 /* Some caution must be observed with overloaded functions and
5616 methods, since the index will not contain any overload
5617 information (but NAME might contain it). */
5620 && strcmp_iw (sym
->search_name (), name
) == 0)
5622 if (with_opaque
!= NULL
5623 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5626 /* Keep looking through other CUs. */
5632 /* This dumps minimal information about .debug_names. It is called
5633 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5634 uses this to verify that .debug_names has been loaded. */
5637 dw2_debug_names_dump (struct objfile
*objfile
)
5639 struct dwarf2_per_objfile
*dwarf2_per_objfile
5640 = get_dwarf2_per_objfile (objfile
);
5642 gdb_assert (dwarf2_per_objfile
->using_index
);
5643 printf_filtered (".debug_names:");
5644 if (dwarf2_per_objfile
->debug_names_table
)
5645 printf_filtered (" exists\n");
5647 printf_filtered (" faked for \"readnow\"\n");
5648 printf_filtered ("\n");
5652 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5653 const char *func_name
)
5655 struct dwarf2_per_objfile
*dwarf2_per_objfile
5656 = get_dwarf2_per_objfile (objfile
);
5658 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5659 if (dwarf2_per_objfile
->debug_names_table
)
5661 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5663 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5665 struct dwarf2_per_cu_data
*per_cu
;
5666 while ((per_cu
= iter
.next ()) != NULL
)
5667 dw2_instantiate_symtab (per_cu
, false);
5672 dw2_debug_names_map_matching_symbols
5673 (struct objfile
*objfile
,
5674 const lookup_name_info
&name
, domain_enum domain
,
5676 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5677 symbol_compare_ftype
*ordered_compare
)
5679 struct dwarf2_per_objfile
*dwarf2_per_objfile
5680 = get_dwarf2_per_objfile (objfile
);
5682 /* debug_names_table is NULL if OBJF_READNOW. */
5683 if (!dwarf2_per_objfile
->debug_names_table
)
5686 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5687 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5689 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5690 auto matcher
= [&] (const char *symname
)
5692 if (ordered_compare
== nullptr)
5694 return ordered_compare (symname
, match_name
) == 0;
5697 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5698 [&] (offset_type namei
)
5700 /* The name was matched, now expand corresponding CUs that were
5702 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5704 struct dwarf2_per_cu_data
*per_cu
;
5705 while ((per_cu
= iter
.next ()) != NULL
)
5706 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5710 /* It's a shame we couldn't do this inside the
5711 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5712 that have already been expanded. Instead, this loop matches what
5713 the psymtab code does. */
5714 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5716 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5717 if (cust
!= nullptr)
5719 const struct block
*block
5720 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5721 if (!iterate_over_symbols_terminated (block
, name
,
5729 dw2_debug_names_expand_symtabs_matching
5730 (struct objfile
*objfile
,
5731 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5732 const lookup_name_info
*lookup_name
,
5733 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5734 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5735 enum search_domain kind
)
5737 struct dwarf2_per_objfile
*dwarf2_per_objfile
5738 = get_dwarf2_per_objfile (objfile
);
5740 /* debug_names_table is NULL if OBJF_READNOW. */
5741 if (!dwarf2_per_objfile
->debug_names_table
)
5744 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5746 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5748 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5752 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5758 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5760 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5762 kind
, [&] (offset_type namei
)
5764 /* The name was matched, now expand corresponding CUs that were
5766 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5768 struct dwarf2_per_cu_data
*per_cu
;
5769 while ((per_cu
= iter
.next ()) != NULL
)
5770 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5776 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5779 dw2_find_last_source_symtab
,
5780 dw2_forget_cached_source_info
,
5781 dw2_map_symtabs_matching_filename
,
5782 dw2_debug_names_lookup_symbol
,
5785 dw2_debug_names_dump
,
5786 dw2_debug_names_expand_symtabs_for_function
,
5787 dw2_expand_all_symtabs
,
5788 dw2_expand_symtabs_with_fullname
,
5789 dw2_debug_names_map_matching_symbols
,
5790 dw2_debug_names_expand_symtabs_matching
,
5791 dw2_find_pc_sect_compunit_symtab
,
5793 dw2_map_symbol_filenames
5796 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5797 to either a dwarf2_per_objfile or dwz_file object. */
5799 template <typename T
>
5800 static gdb::array_view
<const gdb_byte
>
5801 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5803 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5805 if (section
->empty ())
5808 /* Older elfutils strip versions could keep the section in the main
5809 executable while splitting it for the separate debug info file. */
5810 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5813 section
->read (obj
);
5815 /* dwarf2_section_info::size is a bfd_size_type, while
5816 gdb::array_view works with size_t. On 32-bit hosts, with
5817 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5818 is 32-bit. So we need an explicit narrowing conversion here.
5819 This is fine, because it's impossible to allocate or mmap an
5820 array/buffer larger than what size_t can represent. */
5821 return gdb::make_array_view (section
->buffer
, section
->size
);
5824 /* Lookup the index cache for the contents of the index associated to
5827 static gdb::array_view
<const gdb_byte
>
5828 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5830 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5831 if (build_id
== nullptr)
5834 return global_index_cache
.lookup_gdb_index (build_id
,
5835 &dwarf2_obj
->index_cache_res
);
5838 /* Same as the above, but for DWZ. */
5840 static gdb::array_view
<const gdb_byte
>
5841 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5843 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5844 if (build_id
== nullptr)
5847 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5850 /* See symfile.h. */
5853 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5855 struct dwarf2_per_objfile
*dwarf2_per_objfile
5856 = get_dwarf2_per_objfile (objfile
);
5858 /* If we're about to read full symbols, don't bother with the
5859 indices. In this case we also don't care if some other debug
5860 format is making psymtabs, because they are all about to be
5862 if ((objfile
->flags
& OBJF_READNOW
))
5864 dwarf2_per_objfile
->using_index
= 1;
5865 create_all_comp_units (dwarf2_per_objfile
);
5866 create_all_type_units (dwarf2_per_objfile
);
5867 dwarf2_per_objfile
->quick_file_names_table
5868 = create_quick_file_names_table
5869 (dwarf2_per_objfile
->all_comp_units
.size ());
5871 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5872 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5874 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5876 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5877 struct dwarf2_per_cu_quick_data
);
5880 /* Return 1 so that gdb sees the "quick" functions. However,
5881 these functions will be no-ops because we will have expanded
5883 *index_kind
= dw_index_kind::GDB_INDEX
;
5887 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5889 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5893 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5894 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5895 get_gdb_index_contents_from_section
<dwz_file
>))
5897 *index_kind
= dw_index_kind::GDB_INDEX
;
5901 /* ... otherwise, try to find the index in the index cache. */
5902 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5903 get_gdb_index_contents_from_cache
,
5904 get_gdb_index_contents_from_cache_dwz
))
5906 global_index_cache
.hit ();
5907 *index_kind
= dw_index_kind::GDB_INDEX
;
5911 global_index_cache
.miss ();
5917 /* Build a partial symbol table. */
5920 dwarf2_build_psymtabs (struct objfile
*objfile
)
5922 struct dwarf2_per_objfile
*dwarf2_per_objfile
5923 = get_dwarf2_per_objfile (objfile
);
5925 init_psymbol_list (objfile
, 1024);
5929 /* This isn't really ideal: all the data we allocate on the
5930 objfile's obstack is still uselessly kept around. However,
5931 freeing it seems unsafe. */
5932 psymtab_discarder
psymtabs (objfile
);
5933 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5936 /* (maybe) store an index in the cache. */
5937 global_index_cache
.store (dwarf2_per_objfile
);
5939 catch (const gdb_exception_error
&except
)
5941 exception_print (gdb_stderr
, except
);
5945 /* Find the base address of the compilation unit for range lists and
5946 location lists. It will normally be specified by DW_AT_low_pc.
5947 In DWARF-3 draft 4, the base address could be overridden by
5948 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5949 compilation units with discontinuous ranges. */
5952 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5954 struct attribute
*attr
;
5956 cu
->base_address
.reset ();
5958 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5959 if (attr
!= nullptr)
5960 cu
->base_address
= attr
->value_as_address ();
5963 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5964 if (attr
!= nullptr)
5965 cu
->base_address
= attr
->value_as_address ();
5969 /* Helper function that returns the proper abbrev section for
5972 static struct dwarf2_section_info
*
5973 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5975 struct dwarf2_section_info
*abbrev
;
5976 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5978 if (this_cu
->is_dwz
)
5979 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5981 abbrev
= &dwarf2_per_objfile
->abbrev
;
5986 /* Fetch the abbreviation table offset from a comp or type unit header. */
5989 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5990 struct dwarf2_section_info
*section
,
5991 sect_offset sect_off
)
5993 bfd
*abfd
= section
->get_bfd_owner ();
5994 const gdb_byte
*info_ptr
;
5995 unsigned int initial_length_size
, offset_size
;
5998 section
->read (dwarf2_per_objfile
->objfile
);
5999 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6000 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6001 offset_size
= initial_length_size
== 4 ? 4 : 8;
6002 info_ptr
+= initial_length_size
;
6004 version
= read_2_bytes (abfd
, info_ptr
);
6008 /* Skip unit type and address size. */
6012 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6015 /* A partial symtab that is used only for include files. */
6016 struct dwarf2_include_psymtab
: public partial_symtab
6018 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6019 : partial_symtab (filename
, objfile
)
6023 void read_symtab (struct objfile
*objfile
) override
6025 /* It's an include file, no symbols to read for it.
6026 Everything is in the includer symtab. */
6028 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6029 expansion of the includer psymtab. We use the dependencies[0] field to
6030 model the includer. But if we go the regular route of calling
6031 expand_psymtab here, and having expand_psymtab call expand_dependencies
6032 to expand the includer, we'll only use expand_psymtab on the includer
6033 (making it a non-toplevel psymtab), while if we expand the includer via
6034 another path, we'll use read_symtab (making it a toplevel psymtab).
6035 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6036 psymtab, and trigger read_symtab on the includer here directly. */
6037 includer ()->read_symtab (objfile
);
6040 void expand_psymtab (struct objfile
*objfile
) override
6042 /* This is not called by read_symtab, and should not be called by any
6043 expand_dependencies. */
6047 bool readin_p () const override
6049 return includer ()->readin_p ();
6052 struct compunit_symtab
*get_compunit_symtab () const override
6058 partial_symtab
*includer () const
6060 /* An include psymtab has exactly one dependency: the psymtab that
6062 gdb_assert (this->number_of_dependencies
== 1);
6063 return this->dependencies
[0];
6067 /* Allocate a new partial symtab for file named NAME and mark this new
6068 partial symtab as being an include of PST. */
6071 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6072 struct objfile
*objfile
)
6074 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6076 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6078 /* It shares objfile->objfile_obstack. */
6079 subpst
->dirname
= pst
->dirname
;
6082 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6083 subpst
->dependencies
[0] = pst
;
6084 subpst
->number_of_dependencies
= 1;
6087 /* Read the Line Number Program data and extract the list of files
6088 included by the source file represented by PST. Build an include
6089 partial symtab for each of these included files. */
6092 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6093 struct die_info
*die
,
6094 dwarf2_psymtab
*pst
)
6097 struct attribute
*attr
;
6099 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6100 if (attr
!= nullptr)
6101 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6103 return; /* No linetable, so no includes. */
6105 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6106 that we pass in the raw text_low here; that is ok because we're
6107 only decoding the line table to make include partial symtabs, and
6108 so the addresses aren't really used. */
6109 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6110 pst
->raw_text_low (), 1);
6114 hash_signatured_type (const void *item
)
6116 const struct signatured_type
*sig_type
6117 = (const struct signatured_type
*) item
;
6119 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6120 return sig_type
->signature
;
6124 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6126 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6127 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6129 return lhs
->signature
== rhs
->signature
;
6132 /* Allocate a hash table for signatured types. */
6135 allocate_signatured_type_table ()
6137 return htab_up (htab_create_alloc (41,
6138 hash_signatured_type
,
6140 NULL
, xcalloc
, xfree
));
6143 /* A helper function to add a signatured type CU to a table. */
6146 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6148 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6149 std::vector
<signatured_type
*> *all_type_units
6150 = (std::vector
<signatured_type
*> *) datum
;
6152 all_type_units
->push_back (sigt
);
6157 /* A helper for create_debug_types_hash_table. Read types from SECTION
6158 and fill them into TYPES_HTAB. It will process only type units,
6159 therefore DW_UT_type. */
6162 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6163 struct dwo_file
*dwo_file
,
6164 dwarf2_section_info
*section
, htab_up
&types_htab
,
6165 rcuh_kind section_kind
)
6167 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6168 struct dwarf2_section_info
*abbrev_section
;
6170 const gdb_byte
*info_ptr
, *end_ptr
;
6172 abbrev_section
= (dwo_file
!= NULL
6173 ? &dwo_file
->sections
.abbrev
6174 : &dwarf2_per_objfile
->abbrev
);
6176 if (dwarf_read_debug
)
6177 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6178 section
->get_name (),
6179 abbrev_section
->get_file_name ());
6181 section
->read (objfile
);
6182 info_ptr
= section
->buffer
;
6184 if (info_ptr
== NULL
)
6187 /* We can't set abfd until now because the section may be empty or
6188 not present, in which case the bfd is unknown. */
6189 abfd
= section
->get_bfd_owner ();
6191 /* We don't use cutu_reader here because we don't need to read
6192 any dies: the signature is in the header. */
6194 end_ptr
= info_ptr
+ section
->size
;
6195 while (info_ptr
< end_ptr
)
6197 struct signatured_type
*sig_type
;
6198 struct dwo_unit
*dwo_tu
;
6200 const gdb_byte
*ptr
= info_ptr
;
6201 struct comp_unit_head header
;
6202 unsigned int length
;
6204 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6206 /* Initialize it due to a false compiler warning. */
6207 header
.signature
= -1;
6208 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6210 /* We need to read the type's signature in order to build the hash
6211 table, but we don't need anything else just yet. */
6213 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6214 abbrev_section
, ptr
, section_kind
);
6216 length
= header
.get_length ();
6218 /* Skip dummy type units. */
6219 if (ptr
>= info_ptr
+ length
6220 || peek_abbrev_code (abfd
, ptr
) == 0
6221 || header
.unit_type
!= DW_UT_type
)
6227 if (types_htab
== NULL
)
6230 types_htab
= allocate_dwo_unit_table ();
6232 types_htab
= allocate_signatured_type_table ();
6238 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6240 dwo_tu
->dwo_file
= dwo_file
;
6241 dwo_tu
->signature
= header
.signature
;
6242 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6243 dwo_tu
->section
= section
;
6244 dwo_tu
->sect_off
= sect_off
;
6245 dwo_tu
->length
= length
;
6249 /* N.B.: type_offset is not usable if this type uses a DWO file.
6250 The real type_offset is in the DWO file. */
6252 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6253 struct signatured_type
);
6254 sig_type
->signature
= header
.signature
;
6255 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6256 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6257 sig_type
->per_cu
.is_debug_types
= 1;
6258 sig_type
->per_cu
.section
= section
;
6259 sig_type
->per_cu
.sect_off
= sect_off
;
6260 sig_type
->per_cu
.length
= length
;
6263 slot
= htab_find_slot (types_htab
.get (),
6264 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6266 gdb_assert (slot
!= NULL
);
6269 sect_offset dup_sect_off
;
6273 const struct dwo_unit
*dup_tu
6274 = (const struct dwo_unit
*) *slot
;
6276 dup_sect_off
= dup_tu
->sect_off
;
6280 const struct signatured_type
*dup_tu
6281 = (const struct signatured_type
*) *slot
;
6283 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6286 complaint (_("debug type entry at offset %s is duplicate to"
6287 " the entry at offset %s, signature %s"),
6288 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6289 hex_string (header
.signature
));
6291 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6293 if (dwarf_read_debug
> 1)
6294 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6295 sect_offset_str (sect_off
),
6296 hex_string (header
.signature
));
6302 /* Create the hash table of all entries in the .debug_types
6303 (or .debug_types.dwo) section(s).
6304 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6305 otherwise it is NULL.
6307 The result is a pointer to the hash table or NULL if there are no types.
6309 Note: This function processes DWO files only, not DWP files. */
6312 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6313 struct dwo_file
*dwo_file
,
6314 gdb::array_view
<dwarf2_section_info
> type_sections
,
6315 htab_up
&types_htab
)
6317 for (dwarf2_section_info
§ion
: type_sections
)
6318 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6319 types_htab
, rcuh_kind::TYPE
);
6322 /* Create the hash table of all entries in the .debug_types section,
6323 and initialize all_type_units.
6324 The result is zero if there is an error (e.g. missing .debug_types section),
6325 otherwise non-zero. */
6328 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6332 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6333 &dwarf2_per_objfile
->info
, types_htab
,
6334 rcuh_kind::COMPILE
);
6335 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6336 dwarf2_per_objfile
->types
, types_htab
);
6337 if (types_htab
== NULL
)
6339 dwarf2_per_objfile
->signatured_types
= NULL
;
6343 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6345 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6346 dwarf2_per_objfile
->all_type_units
.reserve
6347 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6349 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6350 add_signatured_type_cu_to_table
,
6351 &dwarf2_per_objfile
->all_type_units
);
6356 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6357 If SLOT is non-NULL, it is the entry to use in the hash table.
6358 Otherwise we find one. */
6360 static struct signatured_type
*
6361 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6364 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6366 if (dwarf2_per_objfile
->all_type_units
.size ()
6367 == dwarf2_per_objfile
->all_type_units
.capacity ())
6368 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6370 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6371 struct signatured_type
);
6373 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6374 sig_type
->signature
= sig
;
6375 sig_type
->per_cu
.is_debug_types
= 1;
6376 if (dwarf2_per_objfile
->using_index
)
6378 sig_type
->per_cu
.v
.quick
=
6379 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6380 struct dwarf2_per_cu_quick_data
);
6385 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6388 gdb_assert (*slot
== NULL
);
6390 /* The rest of sig_type must be filled in by the caller. */
6394 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6395 Fill in SIG_ENTRY with DWO_ENTRY. */
6398 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6399 struct signatured_type
*sig_entry
,
6400 struct dwo_unit
*dwo_entry
)
6402 /* Make sure we're not clobbering something we don't expect to. */
6403 gdb_assert (! sig_entry
->per_cu
.queued
);
6404 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6405 if (dwarf2_per_objfile
->using_index
)
6407 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6408 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6411 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6412 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6413 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6414 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6415 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6417 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6418 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6419 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6420 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6421 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6422 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6423 sig_entry
->dwo_unit
= dwo_entry
;
6426 /* Subroutine of lookup_signatured_type.
6427 If we haven't read the TU yet, create the signatured_type data structure
6428 for a TU to be read in directly from a DWO file, bypassing the stub.
6429 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6430 using .gdb_index, then when reading a CU we want to stay in the DWO file
6431 containing that CU. Otherwise we could end up reading several other DWO
6432 files (due to comdat folding) to process the transitive closure of all the
6433 mentioned TUs, and that can be slow. The current DWO file will have every
6434 type signature that it needs.
6435 We only do this for .gdb_index because in the psymtab case we already have
6436 to read all the DWOs to build the type unit groups. */
6438 static struct signatured_type
*
6439 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6441 struct dwarf2_per_objfile
*dwarf2_per_objfile
6442 = cu
->per_cu
->dwarf2_per_objfile
;
6443 struct dwo_file
*dwo_file
;
6444 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6445 struct signatured_type find_sig_entry
, *sig_entry
;
6448 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6450 /* If TU skeletons have been removed then we may not have read in any
6452 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6453 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6455 /* We only ever need to read in one copy of a signatured type.
6456 Use the global signatured_types array to do our own comdat-folding
6457 of types. If this is the first time we're reading this TU, and
6458 the TU has an entry in .gdb_index, replace the recorded data from
6459 .gdb_index with this TU. */
6461 find_sig_entry
.signature
= sig
;
6462 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6463 &find_sig_entry
, INSERT
);
6464 sig_entry
= (struct signatured_type
*) *slot
;
6466 /* We can get here with the TU already read, *or* in the process of being
6467 read. Don't reassign the global entry to point to this DWO if that's
6468 the case. Also note that if the TU is already being read, it may not
6469 have come from a DWO, the program may be a mix of Fission-compiled
6470 code and non-Fission-compiled code. */
6472 /* Have we already tried to read this TU?
6473 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6474 needn't exist in the global table yet). */
6475 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6478 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6479 dwo_unit of the TU itself. */
6480 dwo_file
= cu
->dwo_unit
->dwo_file
;
6482 /* Ok, this is the first time we're reading this TU. */
6483 if (dwo_file
->tus
== NULL
)
6485 find_dwo_entry
.signature
= sig
;
6486 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6488 if (dwo_entry
== NULL
)
6491 /* If the global table doesn't have an entry for this TU, add one. */
6492 if (sig_entry
== NULL
)
6493 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6495 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6496 sig_entry
->per_cu
.tu_read
= 1;
6500 /* Subroutine of lookup_signatured_type.
6501 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6502 then try the DWP file. If the TU stub (skeleton) has been removed then
6503 it won't be in .gdb_index. */
6505 static struct signatured_type
*
6506 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6508 struct dwarf2_per_objfile
*dwarf2_per_objfile
6509 = cu
->per_cu
->dwarf2_per_objfile
;
6510 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6511 struct dwo_unit
*dwo_entry
;
6512 struct signatured_type find_sig_entry
, *sig_entry
;
6515 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6516 gdb_assert (dwp_file
!= NULL
);
6518 /* If TU skeletons have been removed then we may not have read in any
6520 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6521 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6523 find_sig_entry
.signature
= sig
;
6524 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6525 &find_sig_entry
, INSERT
);
6526 sig_entry
= (struct signatured_type
*) *slot
;
6528 /* Have we already tried to read this TU?
6529 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6530 needn't exist in the global table yet). */
6531 if (sig_entry
!= NULL
)
6534 if (dwp_file
->tus
== NULL
)
6536 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6537 sig
, 1 /* is_debug_types */);
6538 if (dwo_entry
== NULL
)
6541 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6542 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6547 /* Lookup a signature based type for DW_FORM_ref_sig8.
6548 Returns NULL if signature SIG is not present in the table.
6549 It is up to the caller to complain about this. */
6551 static struct signatured_type
*
6552 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6554 struct dwarf2_per_objfile
*dwarf2_per_objfile
6555 = cu
->per_cu
->dwarf2_per_objfile
;
6558 && dwarf2_per_objfile
->using_index
)
6560 /* We're in a DWO/DWP file, and we're using .gdb_index.
6561 These cases require special processing. */
6562 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6563 return lookup_dwo_signatured_type (cu
, sig
);
6565 return lookup_dwp_signatured_type (cu
, sig
);
6569 struct signatured_type find_entry
, *entry
;
6571 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6573 find_entry
.signature
= sig
;
6574 entry
= ((struct signatured_type
*)
6575 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6581 /* Low level DIE reading support. */
6583 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6586 init_cu_die_reader (struct die_reader_specs
*reader
,
6587 struct dwarf2_cu
*cu
,
6588 struct dwarf2_section_info
*section
,
6589 struct dwo_file
*dwo_file
,
6590 struct abbrev_table
*abbrev_table
)
6592 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6593 reader
->abfd
= section
->get_bfd_owner ();
6595 reader
->dwo_file
= dwo_file
;
6596 reader
->die_section
= section
;
6597 reader
->buffer
= section
->buffer
;
6598 reader
->buffer_end
= section
->buffer
+ section
->size
;
6599 reader
->abbrev_table
= abbrev_table
;
6602 /* Subroutine of cutu_reader to simplify it.
6603 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6604 There's just a lot of work to do, and cutu_reader is big enough
6607 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6608 from it to the DIE in the DWO. If NULL we are skipping the stub.
6609 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6610 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6611 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6612 STUB_COMP_DIR may be non-NULL.
6613 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6614 are filled in with the info of the DIE from the DWO file.
6615 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6616 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6617 kept around for at least as long as *RESULT_READER.
6619 The result is non-zero if a valid (non-dummy) DIE was found. */
6622 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6623 struct dwo_unit
*dwo_unit
,
6624 struct die_info
*stub_comp_unit_die
,
6625 const char *stub_comp_dir
,
6626 struct die_reader_specs
*result_reader
,
6627 const gdb_byte
**result_info_ptr
,
6628 struct die_info
**result_comp_unit_die
,
6629 abbrev_table_up
*result_dwo_abbrev_table
)
6631 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6632 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6633 struct dwarf2_cu
*cu
= this_cu
->cu
;
6635 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6636 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6637 int i
,num_extra_attrs
;
6638 struct dwarf2_section_info
*dwo_abbrev_section
;
6639 struct die_info
*comp_unit_die
;
6641 /* At most one of these may be provided. */
6642 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6644 /* These attributes aren't processed until later:
6645 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6646 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6647 referenced later. However, these attributes are found in the stub
6648 which we won't have later. In order to not impose this complication
6649 on the rest of the code, we read them here and copy them to the
6658 if (stub_comp_unit_die
!= NULL
)
6660 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6662 if (! this_cu
->is_debug_types
)
6663 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6664 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6665 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6666 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6667 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6669 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6671 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6672 here (if needed). We need the value before we can process
6674 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6676 else if (stub_comp_dir
!= NULL
)
6678 /* Reconstruct the comp_dir attribute to simplify the code below. */
6679 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6680 comp_dir
->name
= DW_AT_comp_dir
;
6681 comp_dir
->form
= DW_FORM_string
;
6682 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6683 DW_STRING (comp_dir
) = stub_comp_dir
;
6686 /* Set up for reading the DWO CU/TU. */
6687 cu
->dwo_unit
= dwo_unit
;
6688 dwarf2_section_info
*section
= dwo_unit
->section
;
6689 section
->read (objfile
);
6690 abfd
= section
->get_bfd_owner ();
6691 begin_info_ptr
= info_ptr
= (section
->buffer
6692 + to_underlying (dwo_unit
->sect_off
));
6693 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6695 if (this_cu
->is_debug_types
)
6697 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6699 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6700 &cu
->header
, section
,
6702 info_ptr
, rcuh_kind::TYPE
);
6703 /* This is not an assert because it can be caused by bad debug info. */
6704 if (sig_type
->signature
!= cu
->header
.signature
)
6706 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6707 " TU at offset %s [in module %s]"),
6708 hex_string (sig_type
->signature
),
6709 hex_string (cu
->header
.signature
),
6710 sect_offset_str (dwo_unit
->sect_off
),
6711 bfd_get_filename (abfd
));
6713 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6714 /* For DWOs coming from DWP files, we don't know the CU length
6715 nor the type's offset in the TU until now. */
6716 dwo_unit
->length
= cu
->header
.get_length ();
6717 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6719 /* Establish the type offset that can be used to lookup the type.
6720 For DWO files, we don't know it until now. */
6721 sig_type
->type_offset_in_section
6722 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6726 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6727 &cu
->header
, section
,
6729 info_ptr
, rcuh_kind::COMPILE
);
6730 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6731 /* For DWOs coming from DWP files, we don't know the CU length
6733 dwo_unit
->length
= cu
->header
.get_length ();
6736 *result_dwo_abbrev_table
6737 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6738 cu
->header
.abbrev_sect_off
);
6739 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6740 result_dwo_abbrev_table
->get ());
6742 /* Read in the die, but leave space to copy over the attributes
6743 from the stub. This has the benefit of simplifying the rest of
6744 the code - all the work to maintain the illusion of a single
6745 DW_TAG_{compile,type}_unit DIE is done here. */
6746 num_extra_attrs
= ((stmt_list
!= NULL
)
6750 + (comp_dir
!= NULL
));
6751 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6754 /* Copy over the attributes from the stub to the DIE we just read in. */
6755 comp_unit_die
= *result_comp_unit_die
;
6756 i
= comp_unit_die
->num_attrs
;
6757 if (stmt_list
!= NULL
)
6758 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6760 comp_unit_die
->attrs
[i
++] = *low_pc
;
6761 if (high_pc
!= NULL
)
6762 comp_unit_die
->attrs
[i
++] = *high_pc
;
6764 comp_unit_die
->attrs
[i
++] = *ranges
;
6765 if (comp_dir
!= NULL
)
6766 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6767 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6769 if (dwarf_die_debug
)
6771 fprintf_unfiltered (gdb_stdlog
,
6772 "Read die from %s@0x%x of %s:\n",
6773 section
->get_name (),
6774 (unsigned) (begin_info_ptr
- section
->buffer
),
6775 bfd_get_filename (abfd
));
6776 dump_die (comp_unit_die
, dwarf_die_debug
);
6779 /* Skip dummy compilation units. */
6780 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6781 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6784 *result_info_ptr
= info_ptr
;
6788 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6789 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6790 signature is part of the header. */
6791 static gdb::optional
<ULONGEST
>
6792 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6794 if (cu
->header
.version
>= 5)
6795 return cu
->header
.signature
;
6796 struct attribute
*attr
;
6797 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6798 if (attr
== nullptr)
6799 return gdb::optional
<ULONGEST
> ();
6800 return DW_UNSND (attr
);
6803 /* Subroutine of cutu_reader to simplify it.
6804 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6805 Returns NULL if the specified DWO unit cannot be found. */
6807 static struct dwo_unit
*
6808 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6809 struct die_info
*comp_unit_die
,
6810 const char *dwo_name
)
6812 struct dwarf2_cu
*cu
= this_cu
->cu
;
6813 struct dwo_unit
*dwo_unit
;
6814 const char *comp_dir
;
6816 gdb_assert (cu
!= NULL
);
6818 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6819 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6820 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6822 if (this_cu
->is_debug_types
)
6824 struct signatured_type
*sig_type
;
6826 /* Since this_cu is the first member of struct signatured_type,
6827 we can go from a pointer to one to a pointer to the other. */
6828 sig_type
= (struct signatured_type
*) this_cu
;
6829 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6833 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6834 if (!signature
.has_value ())
6835 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6837 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6838 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6845 /* Subroutine of cutu_reader to simplify it.
6846 See it for a description of the parameters.
6847 Read a TU directly from a DWO file, bypassing the stub. */
6850 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6851 int use_existing_cu
)
6853 struct signatured_type
*sig_type
;
6855 /* Verify we can do the following downcast, and that we have the
6857 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6858 sig_type
= (struct signatured_type
*) this_cu
;
6859 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6861 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6863 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6864 /* There's no need to do the rereading_dwo_cu handling that
6865 cutu_reader does since we don't read the stub. */
6869 /* If !use_existing_cu, this_cu->cu must be NULL. */
6870 gdb_assert (this_cu
->cu
== NULL
);
6871 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6874 /* A future optimization, if needed, would be to use an existing
6875 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6876 could share abbrev tables. */
6878 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6879 NULL
/* stub_comp_unit_die */,
6880 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6883 &m_dwo_abbrev_table
) == 0)
6890 /* Initialize a CU (or TU) and read its DIEs.
6891 If the CU defers to a DWO file, read the DWO file as well.
6893 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6894 Otherwise the table specified in the comp unit header is read in and used.
6895 This is an optimization for when we already have the abbrev table.
6897 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6898 Otherwise, a new CU is allocated with xmalloc. */
6900 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6901 struct abbrev_table
*abbrev_table
,
6902 int use_existing_cu
,
6904 : die_reader_specs
{},
6907 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6908 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6909 struct dwarf2_section_info
*section
= this_cu
->section
;
6910 bfd
*abfd
= section
->get_bfd_owner ();
6911 struct dwarf2_cu
*cu
;
6912 const gdb_byte
*begin_info_ptr
;
6913 struct signatured_type
*sig_type
= NULL
;
6914 struct dwarf2_section_info
*abbrev_section
;
6915 /* Non-zero if CU currently points to a DWO file and we need to
6916 reread it. When this happens we need to reread the skeleton die
6917 before we can reread the DWO file (this only applies to CUs, not TUs). */
6918 int rereading_dwo_cu
= 0;
6920 if (dwarf_die_debug
)
6921 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6922 this_cu
->is_debug_types
? "type" : "comp",
6923 sect_offset_str (this_cu
->sect_off
));
6925 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6926 file (instead of going through the stub), short-circuit all of this. */
6927 if (this_cu
->reading_dwo_directly
)
6929 /* Narrow down the scope of possibilities to have to understand. */
6930 gdb_assert (this_cu
->is_debug_types
);
6931 gdb_assert (abbrev_table
== NULL
);
6932 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6936 /* This is cheap if the section is already read in. */
6937 section
->read (objfile
);
6939 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6941 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6943 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6946 /* If this CU is from a DWO file we need to start over, we need to
6947 refetch the attributes from the skeleton CU.
6948 This could be optimized by retrieving those attributes from when we
6949 were here the first time: the previous comp_unit_die was stored in
6950 comp_unit_obstack. But there's no data yet that we need this
6952 if (cu
->dwo_unit
!= NULL
)
6953 rereading_dwo_cu
= 1;
6957 /* If !use_existing_cu, this_cu->cu must be NULL. */
6958 gdb_assert (this_cu
->cu
== NULL
);
6959 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6960 cu
= m_new_cu
.get ();
6963 /* Get the header. */
6964 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6966 /* We already have the header, there's no need to read it in again. */
6967 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6971 if (this_cu
->is_debug_types
)
6973 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6974 &cu
->header
, section
,
6975 abbrev_section
, info_ptr
,
6978 /* Since per_cu is the first member of struct signatured_type,
6979 we can go from a pointer to one to a pointer to the other. */
6980 sig_type
= (struct signatured_type
*) this_cu
;
6981 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6982 gdb_assert (sig_type
->type_offset_in_tu
6983 == cu
->header
.type_cu_offset_in_tu
);
6984 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6986 /* LENGTH has not been set yet for type units if we're
6987 using .gdb_index. */
6988 this_cu
->length
= cu
->header
.get_length ();
6990 /* Establish the type offset that can be used to lookup the type. */
6991 sig_type
->type_offset_in_section
=
6992 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6994 this_cu
->dwarf_version
= cu
->header
.version
;
6998 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6999 &cu
->header
, section
,
7002 rcuh_kind::COMPILE
);
7004 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7005 if (this_cu
->length
== 0)
7006 this_cu
->length
= cu
->header
.get_length ();
7008 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7009 this_cu
->dwarf_version
= cu
->header
.version
;
7013 /* Skip dummy compilation units. */
7014 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7015 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7021 /* If we don't have them yet, read the abbrevs for this compilation unit.
7022 And if we need to read them now, make sure they're freed when we're
7024 if (abbrev_table
!= NULL
)
7025 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7028 m_abbrev_table_holder
7029 = abbrev_table::read (objfile
, abbrev_section
,
7030 cu
->header
.abbrev_sect_off
);
7031 abbrev_table
= m_abbrev_table_holder
.get ();
7034 /* Read the top level CU/TU die. */
7035 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7036 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7038 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7044 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7045 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7046 table from the DWO file and pass the ownership over to us. It will be
7047 referenced from READER, so we must make sure to free it after we're done
7050 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7051 DWO CU, that this test will fail (the attribute will not be present). */
7052 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7053 if (dwo_name
!= nullptr)
7055 struct dwo_unit
*dwo_unit
;
7056 struct die_info
*dwo_comp_unit_die
;
7058 if (comp_unit_die
->has_children
)
7060 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7061 " has children (offset %s) [in module %s]"),
7062 sect_offset_str (this_cu
->sect_off
),
7063 bfd_get_filename (abfd
));
7065 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
7066 if (dwo_unit
!= NULL
)
7068 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7069 comp_unit_die
, NULL
,
7072 &m_dwo_abbrev_table
) == 0)
7078 comp_unit_die
= dwo_comp_unit_die
;
7082 /* Yikes, we couldn't find the rest of the DIE, we only have
7083 the stub. A complaint has already been logged. There's
7084 not much more we can do except pass on the stub DIE to
7085 die_reader_func. We don't want to throw an error on bad
7092 cutu_reader::keep ()
7094 /* Done, clean up. */
7095 gdb_assert (!dummy_p
);
7096 if (m_new_cu
!= NULL
)
7098 struct dwarf2_per_objfile
*dwarf2_per_objfile
7099 = m_this_cu
->dwarf2_per_objfile
;
7100 /* Link this CU into read_in_chain. */
7101 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7102 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7103 /* The chain owns it now. */
7104 m_new_cu
.release ();
7108 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7109 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7110 assumed to have already done the lookup to find the DWO file).
7112 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7113 THIS_CU->is_debug_types, but nothing else.
7115 We fill in THIS_CU->length.
7117 THIS_CU->cu is always freed when done.
7118 This is done in order to not leave THIS_CU->cu in a state where we have
7119 to care whether it refers to the "main" CU or the DWO CU.
7121 When parent_cu is passed, it is used to provide a default value for
7122 str_offsets_base and addr_base from the parent. */
7124 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7125 struct dwarf2_cu
*parent_cu
,
7126 struct dwo_file
*dwo_file
)
7127 : die_reader_specs
{},
7130 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7131 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7132 struct dwarf2_section_info
*section
= this_cu
->section
;
7133 bfd
*abfd
= section
->get_bfd_owner ();
7134 struct dwarf2_section_info
*abbrev_section
;
7135 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7137 if (dwarf_die_debug
)
7138 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7139 this_cu
->is_debug_types
? "type" : "comp",
7140 sect_offset_str (this_cu
->sect_off
));
7142 gdb_assert (this_cu
->cu
== NULL
);
7144 abbrev_section
= (dwo_file
!= NULL
7145 ? &dwo_file
->sections
.abbrev
7146 : get_abbrev_section_for_cu (this_cu
));
7148 /* This is cheap if the section is already read in. */
7149 section
->read (objfile
);
7151 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7153 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7154 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7155 &m_new_cu
->header
, section
,
7156 abbrev_section
, info_ptr
,
7157 (this_cu
->is_debug_types
7159 : rcuh_kind::COMPILE
));
7161 if (parent_cu
!= nullptr)
7163 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7164 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7166 this_cu
->length
= m_new_cu
->header
.get_length ();
7168 /* Skip dummy compilation units. */
7169 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7170 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7176 m_abbrev_table_holder
7177 = abbrev_table::read (objfile
, abbrev_section
,
7178 m_new_cu
->header
.abbrev_sect_off
);
7180 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7181 m_abbrev_table_holder
.get ());
7182 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7186 /* Type Unit Groups.
7188 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7189 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7190 so that all types coming from the same compilation (.o file) are grouped
7191 together. A future step could be to put the types in the same symtab as
7192 the CU the types ultimately came from. */
7195 hash_type_unit_group (const void *item
)
7197 const struct type_unit_group
*tu_group
7198 = (const struct type_unit_group
*) item
;
7200 return hash_stmt_list_entry (&tu_group
->hash
);
7204 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7206 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7207 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7209 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7212 /* Allocate a hash table for type unit groups. */
7215 allocate_type_unit_groups_table ()
7217 return htab_up (htab_create_alloc (3,
7218 hash_type_unit_group
,
7220 NULL
, xcalloc
, xfree
));
7223 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7224 partial symtabs. We combine several TUs per psymtab to not let the size
7225 of any one psymtab grow too big. */
7226 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7227 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7229 /* Helper routine for get_type_unit_group.
7230 Create the type_unit_group object used to hold one or more TUs. */
7232 static struct type_unit_group
*
7233 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7235 struct dwarf2_per_objfile
*dwarf2_per_objfile
7236 = cu
->per_cu
->dwarf2_per_objfile
;
7237 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7238 struct dwarf2_per_cu_data
*per_cu
;
7239 struct type_unit_group
*tu_group
;
7241 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7242 struct type_unit_group
);
7243 per_cu
= &tu_group
->per_cu
;
7244 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7246 if (dwarf2_per_objfile
->using_index
)
7248 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7249 struct dwarf2_per_cu_quick_data
);
7253 unsigned int line_offset
= to_underlying (line_offset_struct
);
7254 dwarf2_psymtab
*pst
;
7257 /* Give the symtab a useful name for debug purposes. */
7258 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7259 name
= string_printf ("<type_units_%d>",
7260 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7262 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7264 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7265 pst
->anonymous
= true;
7268 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7269 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7274 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7275 STMT_LIST is a DW_AT_stmt_list attribute. */
7277 static struct type_unit_group
*
7278 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7280 struct dwarf2_per_objfile
*dwarf2_per_objfile
7281 = cu
->per_cu
->dwarf2_per_objfile
;
7282 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7283 struct type_unit_group
*tu_group
;
7285 unsigned int line_offset
;
7286 struct type_unit_group type_unit_group_for_lookup
;
7288 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7289 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7291 /* Do we need to create a new group, or can we use an existing one? */
7295 line_offset
= DW_UNSND (stmt_list
);
7296 ++tu_stats
->nr_symtab_sharers
;
7300 /* Ugh, no stmt_list. Rare, but we have to handle it.
7301 We can do various things here like create one group per TU or
7302 spread them over multiple groups to split up the expansion work.
7303 To avoid worst case scenarios (too many groups or too large groups)
7304 we, umm, group them in bunches. */
7305 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7306 | (tu_stats
->nr_stmt_less_type_units
7307 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7308 ++tu_stats
->nr_stmt_less_type_units
;
7311 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7312 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7313 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7314 &type_unit_group_for_lookup
, INSERT
);
7317 tu_group
= (struct type_unit_group
*) *slot
;
7318 gdb_assert (tu_group
!= NULL
);
7322 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7323 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7325 ++tu_stats
->nr_symtabs
;
7331 /* Partial symbol tables. */
7333 /* Create a psymtab named NAME and assign it to PER_CU.
7335 The caller must fill in the following details:
7336 dirname, textlow, texthigh. */
7338 static dwarf2_psymtab
*
7339 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7341 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7342 dwarf2_psymtab
*pst
;
7344 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7346 pst
->psymtabs_addrmap_supported
= true;
7348 /* This is the glue that links PST into GDB's symbol API. */
7349 per_cu
->v
.psymtab
= pst
;
7354 /* DIE reader function for process_psymtab_comp_unit. */
7357 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7358 const gdb_byte
*info_ptr
,
7359 struct die_info
*comp_unit_die
,
7360 enum language pretend_language
)
7362 struct dwarf2_cu
*cu
= reader
->cu
;
7363 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7364 struct gdbarch
*gdbarch
= objfile
->arch ();
7365 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7367 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7368 dwarf2_psymtab
*pst
;
7369 enum pc_bounds_kind cu_bounds_kind
;
7370 const char *filename
;
7372 gdb_assert (! per_cu
->is_debug_types
);
7374 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7376 /* Allocate a new partial symbol table structure. */
7377 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7378 static const char artificial
[] = "<artificial>";
7379 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7380 if (filename
== NULL
)
7382 else if (strcmp (filename
, artificial
) == 0)
7384 debug_filename
.reset (concat (artificial
, "@",
7385 sect_offset_str (per_cu
->sect_off
),
7387 filename
= debug_filename
.get ();
7390 pst
= create_partial_symtab (per_cu
, filename
);
7392 /* This must be done before calling dwarf2_build_include_psymtabs. */
7393 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7395 baseaddr
= objfile
->text_section_offset ();
7397 dwarf2_find_base_address (comp_unit_die
, cu
);
7399 /* Possibly set the default values of LOWPC and HIGHPC from
7401 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7402 &best_highpc
, cu
, pst
);
7403 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7406 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7409 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7411 /* Store the contiguous range if it is not empty; it can be
7412 empty for CUs with no code. */
7413 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7417 /* Check if comp unit has_children.
7418 If so, read the rest of the partial symbols from this comp unit.
7419 If not, there's no more debug_info for this comp unit. */
7420 if (comp_unit_die
->has_children
)
7422 struct partial_die_info
*first_die
;
7423 CORE_ADDR lowpc
, highpc
;
7425 lowpc
= ((CORE_ADDR
) -1);
7426 highpc
= ((CORE_ADDR
) 0);
7428 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7430 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7431 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7433 /* If we didn't find a lowpc, set it to highpc to avoid
7434 complaints from `maint check'. */
7435 if (lowpc
== ((CORE_ADDR
) -1))
7438 /* If the compilation unit didn't have an explicit address range,
7439 then use the information extracted from its child dies. */
7440 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7443 best_highpc
= highpc
;
7446 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7447 best_lowpc
+ baseaddr
)
7449 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7450 best_highpc
+ baseaddr
)
7453 end_psymtab_common (objfile
, pst
);
7455 if (!cu
->per_cu
->imported_symtabs_empty ())
7458 int len
= cu
->per_cu
->imported_symtabs_size ();
7460 /* Fill in 'dependencies' here; we fill in 'users' in a
7462 pst
->number_of_dependencies
= len
;
7464 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7465 for (i
= 0; i
< len
; ++i
)
7467 pst
->dependencies
[i
]
7468 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7471 cu
->per_cu
->imported_symtabs_free ();
7474 /* Get the list of files included in the current compilation unit,
7475 and build a psymtab for each of them. */
7476 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7478 if (dwarf_read_debug
)
7479 fprintf_unfiltered (gdb_stdlog
,
7480 "Psymtab for %s unit @%s: %s - %s"
7481 ", %d global, %d static syms\n",
7482 per_cu
->is_debug_types
? "type" : "comp",
7483 sect_offset_str (per_cu
->sect_off
),
7484 paddress (gdbarch
, pst
->text_low (objfile
)),
7485 paddress (gdbarch
, pst
->text_high (objfile
)),
7486 pst
->n_global_syms
, pst
->n_static_syms
);
7489 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7490 Process compilation unit THIS_CU for a psymtab. */
7493 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7494 bool want_partial_unit
,
7495 enum language pretend_language
)
7497 /* If this compilation unit was already read in, free the
7498 cached copy in order to read it in again. This is
7499 necessary because we skipped some symbols when we first
7500 read in the compilation unit (see load_partial_dies).
7501 This problem could be avoided, but the benefit is unclear. */
7502 if (this_cu
->cu
!= NULL
)
7503 free_one_cached_comp_unit (this_cu
);
7505 cutu_reader
reader (this_cu
, NULL
, 0, false);
7507 switch (reader
.comp_unit_die
->tag
)
7509 case DW_TAG_compile_unit
:
7510 this_cu
->unit_type
= DW_UT_compile
;
7512 case DW_TAG_partial_unit
:
7513 this_cu
->unit_type
= DW_UT_partial
;
7523 else if (this_cu
->is_debug_types
)
7524 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7525 reader
.comp_unit_die
);
7526 else if (want_partial_unit
7527 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7528 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7529 reader
.comp_unit_die
,
7532 this_cu
->lang
= this_cu
->cu
->language
;
7534 /* Age out any secondary CUs. */
7535 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7538 /* Reader function for build_type_psymtabs. */
7541 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7542 const gdb_byte
*info_ptr
,
7543 struct die_info
*type_unit_die
)
7545 struct dwarf2_per_objfile
*dwarf2_per_objfile
7546 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7547 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7548 struct dwarf2_cu
*cu
= reader
->cu
;
7549 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7550 struct signatured_type
*sig_type
;
7551 struct type_unit_group
*tu_group
;
7552 struct attribute
*attr
;
7553 struct partial_die_info
*first_die
;
7554 CORE_ADDR lowpc
, highpc
;
7555 dwarf2_psymtab
*pst
;
7557 gdb_assert (per_cu
->is_debug_types
);
7558 sig_type
= (struct signatured_type
*) per_cu
;
7560 if (! type_unit_die
->has_children
)
7563 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7564 tu_group
= get_type_unit_group (cu
, attr
);
7566 if (tu_group
->tus
== nullptr)
7567 tu_group
->tus
= new std::vector
<signatured_type
*>;
7568 tu_group
->tus
->push_back (sig_type
);
7570 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7571 pst
= create_partial_symtab (per_cu
, "");
7572 pst
->anonymous
= true;
7574 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7576 lowpc
= (CORE_ADDR
) -1;
7577 highpc
= (CORE_ADDR
) 0;
7578 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7580 end_psymtab_common (objfile
, pst
);
7583 /* Struct used to sort TUs by their abbreviation table offset. */
7585 struct tu_abbrev_offset
7587 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7588 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7591 signatured_type
*sig_type
;
7592 sect_offset abbrev_offset
;
7595 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7598 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7599 const struct tu_abbrev_offset
&b
)
7601 return a
.abbrev_offset
< b
.abbrev_offset
;
7604 /* Efficiently read all the type units.
7605 This does the bulk of the work for build_type_psymtabs.
7607 The efficiency is because we sort TUs by the abbrev table they use and
7608 only read each abbrev table once. In one program there are 200K TUs
7609 sharing 8K abbrev tables.
7611 The main purpose of this function is to support building the
7612 dwarf2_per_objfile->type_unit_groups table.
7613 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7614 can collapse the search space by grouping them by stmt_list.
7615 The savings can be significant, in the same program from above the 200K TUs
7616 share 8K stmt_list tables.
7618 FUNC is expected to call get_type_unit_group, which will create the
7619 struct type_unit_group if necessary and add it to
7620 dwarf2_per_objfile->type_unit_groups. */
7623 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7625 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7626 abbrev_table_up abbrev_table
;
7627 sect_offset abbrev_offset
;
7629 /* It's up to the caller to not call us multiple times. */
7630 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7632 if (dwarf2_per_objfile
->all_type_units
.empty ())
7635 /* TUs typically share abbrev tables, and there can be way more TUs than
7636 abbrev tables. Sort by abbrev table to reduce the number of times we
7637 read each abbrev table in.
7638 Alternatives are to punt or to maintain a cache of abbrev tables.
7639 This is simpler and efficient enough for now.
7641 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7642 symtab to use). Typically TUs with the same abbrev offset have the same
7643 stmt_list value too so in practice this should work well.
7645 The basic algorithm here is:
7647 sort TUs by abbrev table
7648 for each TU with same abbrev table:
7649 read abbrev table if first user
7650 read TU top level DIE
7651 [IWBN if DWO skeletons had DW_AT_stmt_list]
7654 if (dwarf_read_debug
)
7655 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7657 /* Sort in a separate table to maintain the order of all_type_units
7658 for .gdb_index: TU indices directly index all_type_units. */
7659 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7660 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7662 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7663 sorted_by_abbrev
.emplace_back
7664 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7665 sig_type
->per_cu
.section
,
7666 sig_type
->per_cu
.sect_off
));
7668 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7669 sort_tu_by_abbrev_offset
);
7671 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7673 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7675 /* Switch to the next abbrev table if necessary. */
7676 if (abbrev_table
== NULL
7677 || tu
.abbrev_offset
!= abbrev_offset
)
7679 abbrev_offset
= tu
.abbrev_offset
;
7681 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7682 &dwarf2_per_objfile
->abbrev
,
7684 ++tu_stats
->nr_uniq_abbrev_tables
;
7687 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7689 if (!reader
.dummy_p
)
7690 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7691 reader
.comp_unit_die
);
7695 /* Print collected type unit statistics. */
7698 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7700 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7702 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7703 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7704 dwarf2_per_objfile
->all_type_units
.size ());
7705 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7706 tu_stats
->nr_uniq_abbrev_tables
);
7707 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7708 tu_stats
->nr_symtabs
);
7709 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7710 tu_stats
->nr_symtab_sharers
);
7711 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7712 tu_stats
->nr_stmt_less_type_units
);
7713 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7714 tu_stats
->nr_all_type_units_reallocs
);
7717 /* Traversal function for build_type_psymtabs. */
7720 build_type_psymtab_dependencies (void **slot
, void *info
)
7722 struct dwarf2_per_objfile
*dwarf2_per_objfile
7723 = (struct dwarf2_per_objfile
*) info
;
7724 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7725 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7726 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7727 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7728 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7731 gdb_assert (len
> 0);
7732 gdb_assert (per_cu
->type_unit_group_p ());
7734 pst
->number_of_dependencies
= len
;
7735 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7736 for (i
= 0; i
< len
; ++i
)
7738 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7739 gdb_assert (iter
->per_cu
.is_debug_types
);
7740 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7741 iter
->type_unit_group
= tu_group
;
7744 delete tu_group
->tus
;
7745 tu_group
->tus
= nullptr;
7750 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7751 Build partial symbol tables for the .debug_types comp-units. */
7754 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7756 if (! create_all_type_units (dwarf2_per_objfile
))
7759 build_type_psymtabs_1 (dwarf2_per_objfile
);
7762 /* Traversal function for process_skeletonless_type_unit.
7763 Read a TU in a DWO file and build partial symbols for it. */
7766 process_skeletonless_type_unit (void **slot
, void *info
)
7768 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7769 struct dwarf2_per_objfile
*dwarf2_per_objfile
7770 = (struct dwarf2_per_objfile
*) info
;
7771 struct signatured_type find_entry
, *entry
;
7773 /* If this TU doesn't exist in the global table, add it and read it in. */
7775 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7776 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7778 find_entry
.signature
= dwo_unit
->signature
;
7779 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7780 &find_entry
, INSERT
);
7781 /* If we've already seen this type there's nothing to do. What's happening
7782 is we're doing our own version of comdat-folding here. */
7786 /* This does the job that create_all_type_units would have done for
7788 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7789 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7792 /* This does the job that build_type_psymtabs_1 would have done. */
7793 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7794 if (!reader
.dummy_p
)
7795 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7796 reader
.comp_unit_die
);
7801 /* Traversal function for process_skeletonless_type_units. */
7804 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7806 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7808 if (dwo_file
->tus
!= NULL
)
7809 htab_traverse_noresize (dwo_file
->tus
.get (),
7810 process_skeletonless_type_unit
, info
);
7815 /* Scan all TUs of DWO files, verifying we've processed them.
7816 This is needed in case a TU was emitted without its skeleton.
7817 Note: This can't be done until we know what all the DWO files are. */
7820 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7822 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7823 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7824 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7826 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7827 process_dwo_file_for_skeletonless_type_units
,
7828 dwarf2_per_objfile
);
7832 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7835 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7837 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7839 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7844 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7846 /* Set the 'user' field only if it is not already set. */
7847 if (pst
->dependencies
[j
]->user
== NULL
)
7848 pst
->dependencies
[j
]->user
= pst
;
7853 /* Build the partial symbol table by doing a quick pass through the
7854 .debug_info and .debug_abbrev sections. */
7857 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7859 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7861 if (dwarf_read_debug
)
7863 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7864 objfile_name (objfile
));
7867 scoped_restore restore_reading_psyms
7868 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7871 dwarf2_per_objfile
->info
.read (objfile
);
7873 /* Any cached compilation units will be linked by the per-objfile
7874 read_in_chain. Make sure to free them when we're done. */
7875 free_cached_comp_units
freer (dwarf2_per_objfile
);
7877 build_type_psymtabs (dwarf2_per_objfile
);
7879 create_all_comp_units (dwarf2_per_objfile
);
7881 /* Create a temporary address map on a temporary obstack. We later
7882 copy this to the final obstack. */
7883 auto_obstack temp_obstack
;
7885 scoped_restore save_psymtabs_addrmap
7886 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7887 addrmap_create_mutable (&temp_obstack
));
7889 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7891 if (per_cu
->v
.psymtab
!= NULL
)
7892 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7894 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7897 /* This has to wait until we read the CUs, we need the list of DWOs. */
7898 process_skeletonless_type_units (dwarf2_per_objfile
);
7900 /* Now that all TUs have been processed we can fill in the dependencies. */
7901 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7903 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7904 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7907 if (dwarf_read_debug
)
7908 print_tu_stats (dwarf2_per_objfile
);
7910 set_partial_user (dwarf2_per_objfile
);
7912 objfile
->partial_symtabs
->psymtabs_addrmap
7913 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7914 objfile
->partial_symtabs
->obstack ());
7915 /* At this point we want to keep the address map. */
7916 save_psymtabs_addrmap
.release ();
7918 if (dwarf_read_debug
)
7919 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7920 objfile_name (objfile
));
7923 /* Load the partial DIEs for a secondary CU into memory.
7924 This is also used when rereading a primary CU with load_all_dies. */
7927 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7929 cutu_reader
reader (this_cu
, NULL
, 1, false);
7931 if (!reader
.dummy_p
)
7933 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7936 /* Check if comp unit has_children.
7937 If so, read the rest of the partial symbols from this comp unit.
7938 If not, there's no more debug_info for this comp unit. */
7939 if (reader
.comp_unit_die
->has_children
)
7940 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7947 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7948 struct dwarf2_section_info
*section
,
7949 struct dwarf2_section_info
*abbrev_section
,
7950 unsigned int is_dwz
)
7952 const gdb_byte
*info_ptr
;
7953 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7955 if (dwarf_read_debug
)
7956 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7957 section
->get_name (),
7958 section
->get_file_name ());
7960 section
->read (objfile
);
7962 info_ptr
= section
->buffer
;
7964 while (info_ptr
< section
->buffer
+ section
->size
)
7966 struct dwarf2_per_cu_data
*this_cu
;
7968 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7970 comp_unit_head cu_header
;
7971 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7972 abbrev_section
, info_ptr
,
7973 rcuh_kind::COMPILE
);
7975 /* Save the compilation unit for later lookup. */
7976 if (cu_header
.unit_type
!= DW_UT_type
)
7978 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7979 struct dwarf2_per_cu_data
);
7980 memset (this_cu
, 0, sizeof (*this_cu
));
7984 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7985 struct signatured_type
);
7986 memset (sig_type
, 0, sizeof (*sig_type
));
7987 sig_type
->signature
= cu_header
.signature
;
7988 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7989 this_cu
= &sig_type
->per_cu
;
7991 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7992 this_cu
->sect_off
= sect_off
;
7993 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7994 this_cu
->is_dwz
= is_dwz
;
7995 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7996 this_cu
->section
= section
;
7998 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8000 info_ptr
= info_ptr
+ this_cu
->length
;
8004 /* Create a list of all compilation units in OBJFILE.
8005 This is only done for -readnow and building partial symtabs. */
8008 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8010 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8011 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8012 &dwarf2_per_objfile
->abbrev
, 0);
8014 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8016 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8020 /* Process all loaded DIEs for compilation unit CU, starting at
8021 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8022 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8023 DW_AT_ranges). See the comments of add_partial_subprogram on how
8024 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8027 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8028 CORE_ADDR
*highpc
, int set_addrmap
,
8029 struct dwarf2_cu
*cu
)
8031 struct partial_die_info
*pdi
;
8033 /* Now, march along the PDI's, descending into ones which have
8034 interesting children but skipping the children of the other ones,
8035 until we reach the end of the compilation unit. */
8043 /* Anonymous namespaces or modules have no name but have interesting
8044 children, so we need to look at them. Ditto for anonymous
8047 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8048 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8049 || pdi
->tag
== DW_TAG_imported_unit
8050 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8054 case DW_TAG_subprogram
:
8055 case DW_TAG_inlined_subroutine
:
8056 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8058 case DW_TAG_constant
:
8059 case DW_TAG_variable
:
8060 case DW_TAG_typedef
:
8061 case DW_TAG_union_type
:
8062 if (!pdi
->is_declaration
8063 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8065 add_partial_symbol (pdi
, cu
);
8068 case DW_TAG_class_type
:
8069 case DW_TAG_interface_type
:
8070 case DW_TAG_structure_type
:
8071 if (!pdi
->is_declaration
)
8073 add_partial_symbol (pdi
, cu
);
8075 if ((cu
->language
== language_rust
8076 || cu
->language
== language_cplus
) && pdi
->has_children
)
8077 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8080 case DW_TAG_enumeration_type
:
8081 if (!pdi
->is_declaration
)
8082 add_partial_enumeration (pdi
, cu
);
8084 case DW_TAG_base_type
:
8085 case DW_TAG_subrange_type
:
8086 /* File scope base type definitions are added to the partial
8088 add_partial_symbol (pdi
, cu
);
8090 case DW_TAG_namespace
:
8091 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8094 if (!pdi
->is_declaration
)
8095 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8097 case DW_TAG_imported_unit
:
8099 struct dwarf2_per_cu_data
*per_cu
;
8101 /* For now we don't handle imported units in type units. */
8102 if (cu
->per_cu
->is_debug_types
)
8104 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8105 " supported in type units [in module %s]"),
8106 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8109 per_cu
= dwarf2_find_containing_comp_unit
8110 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8111 cu
->per_cu
->dwarf2_per_objfile
);
8113 /* Go read the partial unit, if needed. */
8114 if (per_cu
->v
.psymtab
== NULL
)
8115 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8117 cu
->per_cu
->imported_symtabs_push (per_cu
);
8120 case DW_TAG_imported_declaration
:
8121 add_partial_symbol (pdi
, cu
);
8128 /* If the die has a sibling, skip to the sibling. */
8130 pdi
= pdi
->die_sibling
;
8134 /* Functions used to compute the fully scoped name of a partial DIE.
8136 Normally, this is simple. For C++, the parent DIE's fully scoped
8137 name is concatenated with "::" and the partial DIE's name.
8138 Enumerators are an exception; they use the scope of their parent
8139 enumeration type, i.e. the name of the enumeration type is not
8140 prepended to the enumerator.
8142 There are two complexities. One is DW_AT_specification; in this
8143 case "parent" means the parent of the target of the specification,
8144 instead of the direct parent of the DIE. The other is compilers
8145 which do not emit DW_TAG_namespace; in this case we try to guess
8146 the fully qualified name of structure types from their members'
8147 linkage names. This must be done using the DIE's children rather
8148 than the children of any DW_AT_specification target. We only need
8149 to do this for structures at the top level, i.e. if the target of
8150 any DW_AT_specification (if any; otherwise the DIE itself) does not
8153 /* Compute the scope prefix associated with PDI's parent, in
8154 compilation unit CU. The result will be allocated on CU's
8155 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8156 field. NULL is returned if no prefix is necessary. */
8158 partial_die_parent_scope (struct partial_die_info
*pdi
,
8159 struct dwarf2_cu
*cu
)
8161 const char *grandparent_scope
;
8162 struct partial_die_info
*parent
, *real_pdi
;
8164 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8165 then this means the parent of the specification DIE. */
8168 while (real_pdi
->has_specification
)
8170 auto res
= find_partial_die (real_pdi
->spec_offset
,
8171 real_pdi
->spec_is_dwz
, cu
);
8176 parent
= real_pdi
->die_parent
;
8180 if (parent
->scope_set
)
8181 return parent
->scope
;
8185 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8187 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8188 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8189 Work around this problem here. */
8190 if (cu
->language
== language_cplus
8191 && parent
->tag
== DW_TAG_namespace
8192 && strcmp (parent
->name
, "::") == 0
8193 && grandparent_scope
== NULL
)
8195 parent
->scope
= NULL
;
8196 parent
->scope_set
= 1;
8200 /* Nested subroutines in Fortran get a prefix. */
8201 if (pdi
->tag
== DW_TAG_enumerator
)
8202 /* Enumerators should not get the name of the enumeration as a prefix. */
8203 parent
->scope
= grandparent_scope
;
8204 else if (parent
->tag
== DW_TAG_namespace
8205 || parent
->tag
== DW_TAG_module
8206 || parent
->tag
== DW_TAG_structure_type
8207 || parent
->tag
== DW_TAG_class_type
8208 || parent
->tag
== DW_TAG_interface_type
8209 || parent
->tag
== DW_TAG_union_type
8210 || parent
->tag
== DW_TAG_enumeration_type
8211 || (cu
->language
== language_fortran
8212 && parent
->tag
== DW_TAG_subprogram
8213 && pdi
->tag
== DW_TAG_subprogram
))
8215 if (grandparent_scope
== NULL
)
8216 parent
->scope
= parent
->name
;
8218 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8220 parent
->name
, 0, cu
);
8224 /* FIXME drow/2004-04-01: What should we be doing with
8225 function-local names? For partial symbols, we should probably be
8227 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8228 dwarf_tag_name (parent
->tag
),
8229 sect_offset_str (pdi
->sect_off
));
8230 parent
->scope
= grandparent_scope
;
8233 parent
->scope_set
= 1;
8234 return parent
->scope
;
8237 /* Return the fully scoped name associated with PDI, from compilation unit
8238 CU. The result will be allocated with malloc. */
8240 static gdb::unique_xmalloc_ptr
<char>
8241 partial_die_full_name (struct partial_die_info
*pdi
,
8242 struct dwarf2_cu
*cu
)
8244 const char *parent_scope
;
8246 /* If this is a template instantiation, we can not work out the
8247 template arguments from partial DIEs. So, unfortunately, we have
8248 to go through the full DIEs. At least any work we do building
8249 types here will be reused if full symbols are loaded later. */
8250 if (pdi
->has_template_arguments
)
8254 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8256 struct die_info
*die
;
8257 struct attribute attr
;
8258 struct dwarf2_cu
*ref_cu
= cu
;
8260 /* DW_FORM_ref_addr is using section offset. */
8261 attr
.name
= (enum dwarf_attribute
) 0;
8262 attr
.form
= DW_FORM_ref_addr
;
8263 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8264 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8266 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8270 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8271 if (parent_scope
== NULL
)
8274 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8279 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8281 struct dwarf2_per_objfile
*dwarf2_per_objfile
8282 = cu
->per_cu
->dwarf2_per_objfile
;
8283 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8284 struct gdbarch
*gdbarch
= objfile
->arch ();
8286 const char *actual_name
= NULL
;
8289 baseaddr
= objfile
->text_section_offset ();
8291 gdb::unique_xmalloc_ptr
<char> built_actual_name
8292 = partial_die_full_name (pdi
, cu
);
8293 if (built_actual_name
!= NULL
)
8294 actual_name
= built_actual_name
.get ();
8296 if (actual_name
== NULL
)
8297 actual_name
= pdi
->name
;
8299 partial_symbol psymbol
;
8300 memset (&psymbol
, 0, sizeof (psymbol
));
8301 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8302 psymbol
.ginfo
.section
= -1;
8304 /* The code below indicates that the psymbol should be installed by
8306 gdb::optional
<psymbol_placement
> where
;
8310 case DW_TAG_inlined_subroutine
:
8311 case DW_TAG_subprogram
:
8312 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8314 if (pdi
->is_external
8315 || cu
->language
== language_ada
8316 || (cu
->language
== language_fortran
8317 && pdi
->die_parent
!= NULL
8318 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8320 /* Normally, only "external" DIEs are part of the global scope.
8321 But in Ada and Fortran, we want to be able to access nested
8322 procedures globally. So all Ada and Fortran subprograms are
8323 stored in the global scope. */
8324 where
= psymbol_placement::GLOBAL
;
8327 where
= psymbol_placement::STATIC
;
8329 psymbol
.domain
= VAR_DOMAIN
;
8330 psymbol
.aclass
= LOC_BLOCK
;
8331 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8332 psymbol
.ginfo
.value
.address
= addr
;
8334 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8335 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8337 case DW_TAG_constant
:
8338 psymbol
.domain
= VAR_DOMAIN
;
8339 psymbol
.aclass
= LOC_STATIC
;
8340 where
= (pdi
->is_external
8341 ? psymbol_placement::GLOBAL
8342 : psymbol_placement::STATIC
);
8344 case DW_TAG_variable
:
8346 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8350 && !dwarf2_per_objfile
->has_section_at_zero
)
8352 /* A global or static variable may also have been stripped
8353 out by the linker if unused, in which case its address
8354 will be nullified; do not add such variables into partial
8355 symbol table then. */
8357 else if (pdi
->is_external
)
8360 Don't enter into the minimal symbol tables as there is
8361 a minimal symbol table entry from the ELF symbols already.
8362 Enter into partial symbol table if it has a location
8363 descriptor or a type.
8364 If the location descriptor is missing, new_symbol will create
8365 a LOC_UNRESOLVED symbol, the address of the variable will then
8366 be determined from the minimal symbol table whenever the variable
8368 The address for the partial symbol table entry is not
8369 used by GDB, but it comes in handy for debugging partial symbol
8372 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8374 psymbol
.domain
= VAR_DOMAIN
;
8375 psymbol
.aclass
= LOC_STATIC
;
8376 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8377 psymbol
.ginfo
.value
.address
= addr
;
8378 where
= psymbol_placement::GLOBAL
;
8383 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8385 /* Static Variable. Skip symbols whose value we cannot know (those
8386 without location descriptors or constant values). */
8387 if (!has_loc
&& !pdi
->has_const_value
)
8390 psymbol
.domain
= VAR_DOMAIN
;
8391 psymbol
.aclass
= LOC_STATIC
;
8392 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8394 psymbol
.ginfo
.value
.address
= addr
;
8395 where
= psymbol_placement::STATIC
;
8398 case DW_TAG_typedef
:
8399 case DW_TAG_base_type
:
8400 case DW_TAG_subrange_type
:
8401 psymbol
.domain
= VAR_DOMAIN
;
8402 psymbol
.aclass
= LOC_TYPEDEF
;
8403 where
= psymbol_placement::STATIC
;
8405 case DW_TAG_imported_declaration
:
8406 case DW_TAG_namespace
:
8407 psymbol
.domain
= VAR_DOMAIN
;
8408 psymbol
.aclass
= LOC_TYPEDEF
;
8409 where
= psymbol_placement::GLOBAL
;
8412 /* With Fortran 77 there might be a "BLOCK DATA" module
8413 available without any name. If so, we skip the module as it
8414 doesn't bring any value. */
8415 if (actual_name
!= nullptr)
8417 psymbol
.domain
= MODULE_DOMAIN
;
8418 psymbol
.aclass
= LOC_TYPEDEF
;
8419 where
= psymbol_placement::GLOBAL
;
8422 case DW_TAG_class_type
:
8423 case DW_TAG_interface_type
:
8424 case DW_TAG_structure_type
:
8425 case DW_TAG_union_type
:
8426 case DW_TAG_enumeration_type
:
8427 /* Skip external references. The DWARF standard says in the section
8428 about "Structure, Union, and Class Type Entries": "An incomplete
8429 structure, union or class type is represented by a structure,
8430 union or class entry that does not have a byte size attribute
8431 and that has a DW_AT_declaration attribute." */
8432 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8435 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8436 static vs. global. */
8437 psymbol
.domain
= STRUCT_DOMAIN
;
8438 psymbol
.aclass
= LOC_TYPEDEF
;
8439 where
= (cu
->language
== language_cplus
8440 ? psymbol_placement::GLOBAL
8441 : psymbol_placement::STATIC
);
8443 case DW_TAG_enumerator
:
8444 psymbol
.domain
= VAR_DOMAIN
;
8445 psymbol
.aclass
= LOC_CONST
;
8446 where
= (cu
->language
== language_cplus
8447 ? psymbol_placement::GLOBAL
8448 : psymbol_placement::STATIC
);
8454 if (where
.has_value ())
8456 if (built_actual_name
!= nullptr)
8457 actual_name
= objfile
->intern (actual_name
);
8458 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8459 psymbol
.ginfo
.set_linkage_name (actual_name
);
8462 psymbol
.ginfo
.set_demangled_name (actual_name
,
8463 &objfile
->objfile_obstack
);
8464 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8466 add_psymbol_to_list (psymbol
, *where
, objfile
);
8470 /* Read a partial die corresponding to a namespace; also, add a symbol
8471 corresponding to that namespace to the symbol table. NAMESPACE is
8472 the name of the enclosing namespace. */
8475 add_partial_namespace (struct partial_die_info
*pdi
,
8476 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8477 int set_addrmap
, struct dwarf2_cu
*cu
)
8479 /* Add a symbol for the namespace. */
8481 add_partial_symbol (pdi
, cu
);
8483 /* Now scan partial symbols in that namespace. */
8485 if (pdi
->has_children
)
8486 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8489 /* Read a partial die corresponding to a Fortran module. */
8492 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8493 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8495 /* Add a symbol for the namespace. */
8497 add_partial_symbol (pdi
, cu
);
8499 /* Now scan partial symbols in that module. */
8501 if (pdi
->has_children
)
8502 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8505 /* Read a partial die corresponding to a subprogram or an inlined
8506 subprogram and create a partial symbol for that subprogram.
8507 When the CU language allows it, this routine also defines a partial
8508 symbol for each nested subprogram that this subprogram contains.
8509 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8510 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8512 PDI may also be a lexical block, in which case we simply search
8513 recursively for subprograms defined inside that lexical block.
8514 Again, this is only performed when the CU language allows this
8515 type of definitions. */
8518 add_partial_subprogram (struct partial_die_info
*pdi
,
8519 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8520 int set_addrmap
, struct dwarf2_cu
*cu
)
8522 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8524 if (pdi
->has_pc_info
)
8526 if (pdi
->lowpc
< *lowpc
)
8527 *lowpc
= pdi
->lowpc
;
8528 if (pdi
->highpc
> *highpc
)
8529 *highpc
= pdi
->highpc
;
8532 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8533 struct gdbarch
*gdbarch
= objfile
->arch ();
8535 CORE_ADDR this_highpc
;
8536 CORE_ADDR this_lowpc
;
8538 baseaddr
= objfile
->text_section_offset ();
8540 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8541 pdi
->lowpc
+ baseaddr
)
8544 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8545 pdi
->highpc
+ baseaddr
)
8547 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8548 this_lowpc
, this_highpc
- 1,
8549 cu
->per_cu
->v
.psymtab
);
8553 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8555 if (!pdi
->is_declaration
)
8556 /* Ignore subprogram DIEs that do not have a name, they are
8557 illegal. Do not emit a complaint at this point, we will
8558 do so when we convert this psymtab into a symtab. */
8560 add_partial_symbol (pdi
, cu
);
8564 if (! pdi
->has_children
)
8567 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8569 pdi
= pdi
->die_child
;
8573 if (pdi
->tag
== DW_TAG_subprogram
8574 || pdi
->tag
== DW_TAG_inlined_subroutine
8575 || pdi
->tag
== DW_TAG_lexical_block
)
8576 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8577 pdi
= pdi
->die_sibling
;
8582 /* Read a partial die corresponding to an enumeration type. */
8585 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8586 struct dwarf2_cu
*cu
)
8588 struct partial_die_info
*pdi
;
8590 if (enum_pdi
->name
!= NULL
)
8591 add_partial_symbol (enum_pdi
, cu
);
8593 pdi
= enum_pdi
->die_child
;
8596 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8597 complaint (_("malformed enumerator DIE ignored"));
8599 add_partial_symbol (pdi
, cu
);
8600 pdi
= pdi
->die_sibling
;
8604 /* Return the initial uleb128 in the die at INFO_PTR. */
8607 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8609 unsigned int bytes_read
;
8611 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8614 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8615 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8617 Return the corresponding abbrev, or NULL if the number is zero (indicating
8618 an empty DIE). In either case *BYTES_READ will be set to the length of
8619 the initial number. */
8621 static struct abbrev_info
*
8622 peek_die_abbrev (const die_reader_specs
&reader
,
8623 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8625 dwarf2_cu
*cu
= reader
.cu
;
8626 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8627 unsigned int abbrev_number
8628 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8630 if (abbrev_number
== 0)
8633 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8636 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8637 " at offset %s [in module %s]"),
8638 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8639 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8645 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8646 Returns a pointer to the end of a series of DIEs, terminated by an empty
8647 DIE. Any children of the skipped DIEs will also be skipped. */
8649 static const gdb_byte
*
8650 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8654 unsigned int bytes_read
;
8655 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8658 return info_ptr
+ bytes_read
;
8660 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8664 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8665 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8666 abbrev corresponding to that skipped uleb128 should be passed in
8667 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8670 static const gdb_byte
*
8671 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8672 struct abbrev_info
*abbrev
)
8674 unsigned int bytes_read
;
8675 struct attribute attr
;
8676 bfd
*abfd
= reader
->abfd
;
8677 struct dwarf2_cu
*cu
= reader
->cu
;
8678 const gdb_byte
*buffer
= reader
->buffer
;
8679 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8680 unsigned int form
, i
;
8682 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8684 /* The only abbrev we care about is DW_AT_sibling. */
8685 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8688 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8690 if (attr
.form
== DW_FORM_ref_addr
)
8691 complaint (_("ignoring absolute DW_AT_sibling"));
8694 sect_offset off
= attr
.get_ref_die_offset ();
8695 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8697 if (sibling_ptr
< info_ptr
)
8698 complaint (_("DW_AT_sibling points backwards"));
8699 else if (sibling_ptr
> reader
->buffer_end
)
8700 reader
->die_section
->overflow_complaint ();
8706 /* If it isn't DW_AT_sibling, skip this attribute. */
8707 form
= abbrev
->attrs
[i
].form
;
8711 case DW_FORM_ref_addr
:
8712 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8713 and later it is offset sized. */
8714 if (cu
->header
.version
== 2)
8715 info_ptr
+= cu
->header
.addr_size
;
8717 info_ptr
+= cu
->header
.offset_size
;
8719 case DW_FORM_GNU_ref_alt
:
8720 info_ptr
+= cu
->header
.offset_size
;
8723 info_ptr
+= cu
->header
.addr_size
;
8731 case DW_FORM_flag_present
:
8732 case DW_FORM_implicit_const
:
8749 case DW_FORM_ref_sig8
:
8752 case DW_FORM_data16
:
8755 case DW_FORM_string
:
8756 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8757 info_ptr
+= bytes_read
;
8759 case DW_FORM_sec_offset
:
8761 case DW_FORM_GNU_strp_alt
:
8762 info_ptr
+= cu
->header
.offset_size
;
8764 case DW_FORM_exprloc
:
8766 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8767 info_ptr
+= bytes_read
;
8769 case DW_FORM_block1
:
8770 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8772 case DW_FORM_block2
:
8773 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8775 case DW_FORM_block4
:
8776 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8782 case DW_FORM_ref_udata
:
8783 case DW_FORM_GNU_addr_index
:
8784 case DW_FORM_GNU_str_index
:
8785 case DW_FORM_rnglistx
:
8786 case DW_FORM_loclistx
:
8787 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8789 case DW_FORM_indirect
:
8790 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8791 info_ptr
+= bytes_read
;
8792 /* We need to continue parsing from here, so just go back to
8794 goto skip_attribute
;
8797 error (_("Dwarf Error: Cannot handle %s "
8798 "in DWARF reader [in module %s]"),
8799 dwarf_form_name (form
),
8800 bfd_get_filename (abfd
));
8804 if (abbrev
->has_children
)
8805 return skip_children (reader
, info_ptr
);
8810 /* Locate ORIG_PDI's sibling.
8811 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8813 static const gdb_byte
*
8814 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8815 struct partial_die_info
*orig_pdi
,
8816 const gdb_byte
*info_ptr
)
8818 /* Do we know the sibling already? */
8820 if (orig_pdi
->sibling
)
8821 return orig_pdi
->sibling
;
8823 /* Are there any children to deal with? */
8825 if (!orig_pdi
->has_children
)
8828 /* Skip the children the long way. */
8830 return skip_children (reader
, info_ptr
);
8833 /* Expand this partial symbol table into a full symbol table. SELF is
8837 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8839 struct dwarf2_per_objfile
*dwarf2_per_objfile
8840 = get_dwarf2_per_objfile (objfile
);
8842 gdb_assert (!readin
);
8843 /* If this psymtab is constructed from a debug-only objfile, the
8844 has_section_at_zero flag will not necessarily be correct. We
8845 can get the correct value for this flag by looking at the data
8846 associated with the (presumably stripped) associated objfile. */
8847 if (objfile
->separate_debug_objfile_backlink
)
8849 struct dwarf2_per_objfile
*dpo_backlink
8850 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8852 dwarf2_per_objfile
->has_section_at_zero
8853 = dpo_backlink
->has_section_at_zero
;
8856 expand_psymtab (objfile
);
8858 process_cu_includes (dwarf2_per_objfile
);
8861 /* Reading in full CUs. */
8863 /* Add PER_CU to the queue. */
8866 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8867 enum language pretend_language
)
8870 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
8873 /* If PER_CU is not yet queued, add it to the queue.
8874 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8876 The result is non-zero if PER_CU was queued, otherwise the result is zero
8877 meaning either PER_CU is already queued or it is already loaded.
8879 N.B. There is an invariant here that if a CU is queued then it is loaded.
8880 The caller is required to load PER_CU if we return non-zero. */
8883 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8884 struct dwarf2_per_cu_data
*per_cu
,
8885 enum language pretend_language
)
8887 /* We may arrive here during partial symbol reading, if we need full
8888 DIEs to process an unusual case (e.g. template arguments). Do
8889 not queue PER_CU, just tell our caller to load its DIEs. */
8890 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
8892 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8897 /* Mark the dependence relation so that we don't flush PER_CU
8899 if (dependent_cu
!= NULL
)
8900 dwarf2_add_dependence (dependent_cu
, per_cu
);
8902 /* If it's already on the queue, we have nothing to do. */
8906 /* If the compilation unit is already loaded, just mark it as
8908 if (per_cu
->cu
!= NULL
)
8910 per_cu
->cu
->last_used
= 0;
8914 /* Add it to the queue. */
8915 queue_comp_unit (per_cu
, pretend_language
);
8920 /* Process the queue. */
8923 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8925 if (dwarf_read_debug
)
8927 fprintf_unfiltered (gdb_stdlog
,
8928 "Expanding one or more symtabs of objfile %s ...\n",
8929 objfile_name (dwarf2_per_objfile
->objfile
));
8932 /* The queue starts out with one item, but following a DIE reference
8933 may load a new CU, adding it to the end of the queue. */
8934 while (!dwarf2_per_objfile
->queue
.empty ())
8936 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
8938 if ((dwarf2_per_objfile
->using_index
8939 ? !item
.per_cu
->v
.quick
->compunit_symtab
8940 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8941 /* Skip dummy CUs. */
8942 && item
.per_cu
->cu
!= NULL
)
8944 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8945 unsigned int debug_print_threshold
;
8948 if (per_cu
->is_debug_types
)
8950 struct signatured_type
*sig_type
=
8951 (struct signatured_type
*) per_cu
;
8953 sprintf (buf
, "TU %s at offset %s",
8954 hex_string (sig_type
->signature
),
8955 sect_offset_str (per_cu
->sect_off
));
8956 /* There can be 100s of TUs.
8957 Only print them in verbose mode. */
8958 debug_print_threshold
= 2;
8962 sprintf (buf
, "CU at offset %s",
8963 sect_offset_str (per_cu
->sect_off
));
8964 debug_print_threshold
= 1;
8967 if (dwarf_read_debug
>= debug_print_threshold
)
8968 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8970 if (per_cu
->is_debug_types
)
8971 process_full_type_unit (per_cu
, item
.pretend_language
);
8973 process_full_comp_unit (per_cu
, item
.pretend_language
);
8975 if (dwarf_read_debug
>= debug_print_threshold
)
8976 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8979 item
.per_cu
->queued
= 0;
8980 dwarf2_per_objfile
->queue
.pop ();
8983 if (dwarf_read_debug
)
8985 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8986 objfile_name (dwarf2_per_objfile
->objfile
));
8990 /* Read in full symbols for PST, and anything it depends on. */
8993 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8995 gdb_assert (!readin
);
8997 expand_dependencies (objfile
);
8999 dw2_do_instantiate_symtab (per_cu_data
, false);
9000 gdb_assert (get_compunit_symtab () != nullptr);
9003 /* Trivial hash function for die_info: the hash value of a DIE
9004 is its offset in .debug_info for this objfile. */
9007 die_hash (const void *item
)
9009 const struct die_info
*die
= (const struct die_info
*) item
;
9011 return to_underlying (die
->sect_off
);
9014 /* Trivial comparison function for die_info structures: two DIEs
9015 are equal if they have the same offset. */
9018 die_eq (const void *item_lhs
, const void *item_rhs
)
9020 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9021 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9023 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9026 /* Load the DIEs associated with PER_CU into memory. */
9029 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9031 enum language pretend_language
)
9033 gdb_assert (! this_cu
->is_debug_types
);
9035 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
9039 struct dwarf2_cu
*cu
= reader
.cu
;
9040 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9042 gdb_assert (cu
->die_hash
== NULL
);
9044 htab_create_alloc_ex (cu
->header
.length
/ 12,
9048 &cu
->comp_unit_obstack
,
9049 hashtab_obstack_allocate
,
9050 dummy_obstack_deallocate
);
9052 if (reader
.comp_unit_die
->has_children
)
9053 reader
.comp_unit_die
->child
9054 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9055 &info_ptr
, reader
.comp_unit_die
);
9056 cu
->dies
= reader
.comp_unit_die
;
9057 /* comp_unit_die is not stored in die_hash, no need. */
9059 /* We try not to read any attributes in this function, because not
9060 all CUs needed for references have been loaded yet, and symbol
9061 table processing isn't initialized. But we have to set the CU language,
9062 or we won't be able to build types correctly.
9063 Similarly, if we do not read the producer, we can not apply
9064 producer-specific interpretation. */
9065 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9070 /* Add a DIE to the delayed physname list. */
9073 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9074 const char *name
, struct die_info
*die
,
9075 struct dwarf2_cu
*cu
)
9077 struct delayed_method_info mi
;
9079 mi
.fnfield_index
= fnfield_index
;
9083 cu
->method_list
.push_back (mi
);
9086 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9087 "const" / "volatile". If so, decrements LEN by the length of the
9088 modifier and return true. Otherwise return false. */
9092 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9094 size_t mod_len
= sizeof (mod
) - 1;
9095 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9103 /* Compute the physnames of any methods on the CU's method list.
9105 The computation of method physnames is delayed in order to avoid the
9106 (bad) condition that one of the method's formal parameters is of an as yet
9110 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9112 /* Only C++ delays computing physnames. */
9113 if (cu
->method_list
.empty ())
9115 gdb_assert (cu
->language
== language_cplus
);
9117 for (const delayed_method_info
&mi
: cu
->method_list
)
9119 const char *physname
;
9120 struct fn_fieldlist
*fn_flp
9121 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9122 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9123 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9124 = physname
? physname
: "";
9126 /* Since there's no tag to indicate whether a method is a
9127 const/volatile overload, extract that information out of the
9129 if (physname
!= NULL
)
9131 size_t len
= strlen (physname
);
9135 if (physname
[len
] == ')') /* shortcut */
9137 else if (check_modifier (physname
, len
, " const"))
9138 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9139 else if (check_modifier (physname
, len
, " volatile"))
9140 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9147 /* The list is no longer needed. */
9148 cu
->method_list
.clear ();
9151 /* Go objects should be embedded in a DW_TAG_module DIE,
9152 and it's not clear if/how imported objects will appear.
9153 To keep Go support simple until that's worked out,
9154 go back through what we've read and create something usable.
9155 We could do this while processing each DIE, and feels kinda cleaner,
9156 but that way is more invasive.
9157 This is to, for example, allow the user to type "p var" or "b main"
9158 without having to specify the package name, and allow lookups
9159 of module.object to work in contexts that use the expression
9163 fixup_go_packaging (struct dwarf2_cu
*cu
)
9165 gdb::unique_xmalloc_ptr
<char> package_name
;
9166 struct pending
*list
;
9169 for (list
= *cu
->get_builder ()->get_global_symbols ();
9173 for (i
= 0; i
< list
->nsyms
; ++i
)
9175 struct symbol
*sym
= list
->symbol
[i
];
9177 if (sym
->language () == language_go
9178 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9180 gdb::unique_xmalloc_ptr
<char> this_package_name
9181 (go_symbol_package_name (sym
));
9183 if (this_package_name
== NULL
)
9185 if (package_name
== NULL
)
9186 package_name
= std::move (this_package_name
);
9189 struct objfile
*objfile
9190 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9191 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9192 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9193 (symbol_symtab (sym
) != NULL
9194 ? symtab_to_filename_for_display
9195 (symbol_symtab (sym
))
9196 : objfile_name (objfile
)),
9197 this_package_name
.get (), package_name
.get ());
9203 if (package_name
!= NULL
)
9205 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9206 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9207 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9208 saved_package_name
);
9211 sym
= new (&objfile
->objfile_obstack
) symbol
;
9212 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9213 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9214 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9215 e.g., "main" finds the "main" module and not C's main(). */
9216 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9217 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9218 SYMBOL_TYPE (sym
) = type
;
9220 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9224 /* Allocate a fully-qualified name consisting of the two parts on the
9228 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9230 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9233 /* A helper that allocates a variant part to attach to a Rust enum
9234 type. OBSTACK is where the results should be allocated. TYPE is
9235 the type we're processing. DISCRIMINANT_INDEX is the index of the
9236 discriminant. It must be the index of one of the fields of TYPE.
9237 DEFAULT_INDEX is the index of the default field; or -1 if there is
9238 no default. RANGES is indexed by "effective" field number (the
9239 field index, but omitting the discriminant and default fields) and
9240 must hold the discriminant values used by the variants. Note that
9241 RANGES must have a lifetime at least as long as OBSTACK -- either
9242 already allocated on it, or static. */
9245 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9246 int discriminant_index
, int default_index
,
9247 gdb::array_view
<discriminant_range
> ranges
)
9249 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9250 must be handled by the caller. */
9251 gdb_assert (discriminant_index
>= 0
9252 && discriminant_index
< type
->num_fields ());
9253 gdb_assert (default_index
== -1
9254 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9256 /* We have one variant for each non-discriminant field. */
9257 int n_variants
= type
->num_fields () - 1;
9259 variant
*variants
= new (obstack
) variant
[n_variants
];
9262 for (int i
= 0; i
< type
->num_fields (); ++i
)
9264 if (i
== discriminant_index
)
9267 variants
[var_idx
].first_field
= i
;
9268 variants
[var_idx
].last_field
= i
+ 1;
9270 /* The default field does not need a range, but other fields do.
9271 We skipped the discriminant above. */
9272 if (i
!= default_index
)
9274 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9281 gdb_assert (range_idx
== ranges
.size ());
9282 gdb_assert (var_idx
== n_variants
);
9284 variant_part
*part
= new (obstack
) variant_part
;
9285 part
->discriminant_index
= discriminant_index
;
9286 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9287 discriminant_index
));
9288 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9290 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9291 gdb::array_view
<variant_part
> *prop_value
9292 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9294 struct dynamic_prop prop
;
9295 prop
.kind
= PROP_VARIANT_PARTS
;
9296 prop
.data
.variant_parts
= prop_value
;
9298 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9301 /* Some versions of rustc emitted enums in an unusual way.
9303 Ordinary enums were emitted as unions. The first element of each
9304 structure in the union was named "RUST$ENUM$DISR". This element
9305 held the discriminant.
9307 These versions of Rust also implemented the "non-zero"
9308 optimization. When the enum had two values, and one is empty and
9309 the other holds a pointer that cannot be zero, the pointer is used
9310 as the discriminant, with a zero value meaning the empty variant.
9311 Here, the union's first member is of the form
9312 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9313 where the fieldnos are the indices of the fields that should be
9314 traversed in order to find the field (which may be several fields deep)
9315 and the variantname is the name of the variant of the case when the
9318 This function recognizes whether TYPE is of one of these forms,
9319 and, if so, smashes it to be a variant type. */
9322 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9324 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9326 /* We don't need to deal with empty enums. */
9327 if (type
->num_fields () == 0)
9330 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9331 if (type
->num_fields () == 1
9332 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9334 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9336 /* Decode the field name to find the offset of the
9338 ULONGEST bit_offset
= 0;
9339 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9340 while (name
[0] >= '0' && name
[0] <= '9')
9343 unsigned long index
= strtoul (name
, &tail
, 10);
9346 || index
>= field_type
->num_fields ()
9347 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9348 != FIELD_LOC_KIND_BITPOS
))
9350 complaint (_("Could not parse Rust enum encoding string \"%s\""
9352 TYPE_FIELD_NAME (type
, 0),
9353 objfile_name (objfile
));
9358 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9359 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9362 /* Smash this type to be a structure type. We have to do this
9363 because the type has already been recorded. */
9364 type
->set_code (TYPE_CODE_STRUCT
);
9365 type
->set_num_fields (3);
9366 /* Save the field we care about. */
9367 struct field saved_field
= TYPE_FIELD (type
, 0);
9369 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9371 /* Put the discriminant at index 0. */
9372 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9373 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9374 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9375 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), bit_offset
);
9377 /* The order of fields doesn't really matter, so put the real
9378 field at index 1 and the data-less field at index 2. */
9379 TYPE_FIELD (type
, 1) = saved_field
;
9380 TYPE_FIELD_NAME (type
, 1)
9381 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, 1)->name ());
9382 TYPE_FIELD_TYPE (type
, 1)->set_name
9383 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9384 TYPE_FIELD_NAME (type
, 1)));
9386 const char *dataless_name
9387 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9389 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9391 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9392 /* NAME points into the original discriminant name, which
9393 already has the correct lifetime. */
9394 TYPE_FIELD_NAME (type
, 2) = name
;
9395 SET_FIELD_BITPOS (TYPE_FIELD (type
, 2), 0);
9397 /* Indicate that this is a variant type. */
9398 static discriminant_range ranges
[1] = { { 0, 0 } };
9399 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9401 /* A union with a single anonymous field is probably an old-style
9403 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9405 /* Smash this type to be a structure type. We have to do this
9406 because the type has already been recorded. */
9407 type
->set_code (TYPE_CODE_STRUCT
);
9409 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9410 const char *variant_name
9411 = rust_last_path_segment (field_type
->name ());
9412 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9413 field_type
->set_name
9414 (rust_fully_qualify (&objfile
->objfile_obstack
,
9415 type
->name (), variant_name
));
9419 struct type
*disr_type
= nullptr;
9420 for (int i
= 0; i
< type
->num_fields (); ++i
)
9422 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9424 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9426 /* All fields of a true enum will be structs. */
9429 else if (disr_type
->num_fields () == 0)
9431 /* Could be data-less variant, so keep going. */
9432 disr_type
= nullptr;
9434 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9435 "RUST$ENUM$DISR") != 0)
9437 /* Not a Rust enum. */
9447 /* If we got here without a discriminant, then it's probably
9449 if (disr_type
== nullptr)
9452 /* Smash this type to be a structure type. We have to do this
9453 because the type has already been recorded. */
9454 type
->set_code (TYPE_CODE_STRUCT
);
9456 /* Make space for the discriminant field. */
9457 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9459 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9460 * sizeof (struct field
)));
9461 memcpy (new_fields
+ 1, TYPE_FIELDS (type
),
9462 type
->num_fields () * sizeof (struct field
));
9463 TYPE_FIELDS (type
) = new_fields
;
9464 type
->set_num_fields (type
->num_fields () + 1);
9466 /* Install the discriminant at index 0 in the union. */
9467 TYPE_FIELD (type
, 0) = *disr_field
;
9468 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9469 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9471 /* We need a way to find the correct discriminant given a
9472 variant name. For convenience we build a map here. */
9473 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9474 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9475 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9477 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9480 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9481 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9485 int n_fields
= type
->num_fields ();
9486 /* We don't need a range entry for the discriminant, but we do
9487 need one for every other field, as there is no default
9489 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9492 /* Skip the discriminant here. */
9493 for (int i
= 1; i
< n_fields
; ++i
)
9495 /* Find the final word in the name of this variant's type.
9496 That name can be used to look up the correct
9498 const char *variant_name
9499 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, i
)->name ());
9501 auto iter
= discriminant_map
.find (variant_name
);
9502 if (iter
!= discriminant_map
.end ())
9504 ranges
[i
].low
= iter
->second
;
9505 ranges
[i
].high
= iter
->second
;
9508 /* Remove the discriminant field, if it exists. */
9509 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9510 if (sub_type
->num_fields () > 0)
9512 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9513 ++TYPE_FIELDS (sub_type
);
9515 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9517 (rust_fully_qualify (&objfile
->objfile_obstack
,
9518 type
->name (), variant_name
));
9521 /* Indicate that this is a variant type. */
9522 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9523 gdb::array_view
<discriminant_range
> (ranges
,
9528 /* Rewrite some Rust unions to be structures with variants parts. */
9531 rust_union_quirks (struct dwarf2_cu
*cu
)
9533 gdb_assert (cu
->language
== language_rust
);
9534 for (type
*type_
: cu
->rust_unions
)
9535 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9536 /* We don't need this any more. */
9537 cu
->rust_unions
.clear ();
9540 /* Return the symtab for PER_CU. This works properly regardless of
9541 whether we're using the index or psymtabs. */
9543 static struct compunit_symtab
*
9544 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9546 return (per_cu
->dwarf2_per_objfile
->using_index
9547 ? per_cu
->v
.quick
->compunit_symtab
9548 : per_cu
->v
.psymtab
->compunit_symtab
);
9551 /* A helper function for computing the list of all symbol tables
9552 included by PER_CU. */
9555 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9556 htab_t all_children
, htab_t all_type_symtabs
,
9557 struct dwarf2_per_cu_data
*per_cu
,
9558 struct compunit_symtab
*immediate_parent
)
9561 struct compunit_symtab
*cust
;
9563 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9566 /* This inclusion and its children have been processed. */
9571 /* Only add a CU if it has a symbol table. */
9572 cust
= get_compunit_symtab (per_cu
);
9575 /* If this is a type unit only add its symbol table if we haven't
9576 seen it yet (type unit per_cu's can share symtabs). */
9577 if (per_cu
->is_debug_types
)
9579 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9583 result
->push_back (cust
);
9584 if (cust
->user
== NULL
)
9585 cust
->user
= immediate_parent
;
9590 result
->push_back (cust
);
9591 if (cust
->user
== NULL
)
9592 cust
->user
= immediate_parent
;
9596 if (!per_cu
->imported_symtabs_empty ())
9597 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9599 recursively_compute_inclusions (result
, all_children
,
9600 all_type_symtabs
, ptr
, cust
);
9604 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9608 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9610 gdb_assert (! per_cu
->is_debug_types
);
9612 if (!per_cu
->imported_symtabs_empty ())
9615 std::vector
<compunit_symtab
*> result_symtabs
;
9616 htab_t all_children
, all_type_symtabs
;
9617 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9619 /* If we don't have a symtab, we can just skip this case. */
9623 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9624 NULL
, xcalloc
, xfree
);
9625 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9626 NULL
, xcalloc
, xfree
);
9628 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9630 recursively_compute_inclusions (&result_symtabs
, all_children
,
9631 all_type_symtabs
, ptr
, cust
);
9634 /* Now we have a transitive closure of all the included symtabs. */
9635 len
= result_symtabs
.size ();
9637 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9638 struct compunit_symtab
*, len
+ 1);
9639 memcpy (cust
->includes
, result_symtabs
.data (),
9640 len
* sizeof (compunit_symtab
*));
9641 cust
->includes
[len
] = NULL
;
9643 htab_delete (all_children
);
9644 htab_delete (all_type_symtabs
);
9648 /* Compute the 'includes' field for the symtabs of all the CUs we just
9652 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9654 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9656 if (! iter
->is_debug_types
)
9657 compute_compunit_symtab_includes (iter
);
9660 dwarf2_per_objfile
->just_read_cus
.clear ();
9663 /* Generate full symbol information for PER_CU, whose DIEs have
9664 already been loaded into memory. */
9667 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9668 enum language pretend_language
)
9670 struct dwarf2_cu
*cu
= per_cu
->cu
;
9671 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9672 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9673 struct gdbarch
*gdbarch
= objfile
->arch ();
9674 CORE_ADDR lowpc
, highpc
;
9675 struct compunit_symtab
*cust
;
9677 struct block
*static_block
;
9680 baseaddr
= objfile
->text_section_offset ();
9682 /* Clear the list here in case something was left over. */
9683 cu
->method_list
.clear ();
9685 cu
->language
= pretend_language
;
9686 cu
->language_defn
= language_def (cu
->language
);
9688 /* Do line number decoding in read_file_scope () */
9689 process_die (cu
->dies
, cu
);
9691 /* For now fudge the Go package. */
9692 if (cu
->language
== language_go
)
9693 fixup_go_packaging (cu
);
9695 /* Now that we have processed all the DIEs in the CU, all the types
9696 should be complete, and it should now be safe to compute all of the
9698 compute_delayed_physnames (cu
);
9700 if (cu
->language
== language_rust
)
9701 rust_union_quirks (cu
);
9703 /* Some compilers don't define a DW_AT_high_pc attribute for the
9704 compilation unit. If the DW_AT_high_pc is missing, synthesize
9705 it, by scanning the DIE's below the compilation unit. */
9706 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9708 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9709 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9711 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9712 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9713 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9714 addrmap to help ensure it has an accurate map of pc values belonging to
9716 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9718 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9719 SECT_OFF_TEXT (objfile
),
9724 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9726 /* Set symtab language to language from DW_AT_language. If the
9727 compilation is from a C file generated by language preprocessors, do
9728 not set the language if it was already deduced by start_subfile. */
9729 if (!(cu
->language
== language_c
9730 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9731 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9733 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9734 produce DW_AT_location with location lists but it can be possibly
9735 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9736 there were bugs in prologue debug info, fixed later in GCC-4.5
9737 by "unwind info for epilogues" patch (which is not directly related).
9739 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9740 needed, it would be wrong due to missing DW_AT_producer there.
9742 Still one can confuse GDB by using non-standard GCC compilation
9743 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9745 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9746 cust
->locations_valid
= 1;
9748 if (gcc_4_minor
>= 5)
9749 cust
->epilogue_unwind_valid
= 1;
9751 cust
->call_site_htab
= cu
->call_site_htab
;
9754 if (dwarf2_per_objfile
->using_index
)
9755 per_cu
->v
.quick
->compunit_symtab
= cust
;
9758 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9759 pst
->compunit_symtab
= cust
;
9763 /* Push it for inclusion processing later. */
9764 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
9766 /* Not needed any more. */
9767 cu
->reset_builder ();
9770 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9771 already been loaded into memory. */
9774 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9775 enum language pretend_language
)
9777 struct dwarf2_cu
*cu
= per_cu
->cu
;
9778 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9779 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9780 struct compunit_symtab
*cust
;
9781 struct signatured_type
*sig_type
;
9783 gdb_assert (per_cu
->is_debug_types
);
9784 sig_type
= (struct signatured_type
*) per_cu
;
9786 /* Clear the list here in case something was left over. */
9787 cu
->method_list
.clear ();
9789 cu
->language
= pretend_language
;
9790 cu
->language_defn
= language_def (cu
->language
);
9792 /* The symbol tables are set up in read_type_unit_scope. */
9793 process_die (cu
->dies
, cu
);
9795 /* For now fudge the Go package. */
9796 if (cu
->language
== language_go
)
9797 fixup_go_packaging (cu
);
9799 /* Now that we have processed all the DIEs in the CU, all the types
9800 should be complete, and it should now be safe to compute all of the
9802 compute_delayed_physnames (cu
);
9804 if (cu
->language
== language_rust
)
9805 rust_union_quirks (cu
);
9807 /* TUs share symbol tables.
9808 If this is the first TU to use this symtab, complete the construction
9809 of it with end_expandable_symtab. Otherwise, complete the addition of
9810 this TU's symbols to the existing symtab. */
9811 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9813 buildsym_compunit
*builder
= cu
->get_builder ();
9814 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9815 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9819 /* Set symtab language to language from DW_AT_language. If the
9820 compilation is from a C file generated by language preprocessors,
9821 do not set the language if it was already deduced by
9823 if (!(cu
->language
== language_c
9824 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9825 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9830 cu
->get_builder ()->augment_type_symtab ();
9831 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9834 if (dwarf2_per_objfile
->using_index
)
9835 per_cu
->v
.quick
->compunit_symtab
= cust
;
9838 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9839 pst
->compunit_symtab
= cust
;
9843 /* Not needed any more. */
9844 cu
->reset_builder ();
9847 /* Process an imported unit DIE. */
9850 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9852 struct attribute
*attr
;
9854 /* For now we don't handle imported units in type units. */
9855 if (cu
->per_cu
->is_debug_types
)
9857 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9858 " supported in type units [in module %s]"),
9859 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9862 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9865 sect_offset sect_off
= attr
->get_ref_die_offset ();
9866 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9867 dwarf2_per_cu_data
*per_cu
9868 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9869 cu
->per_cu
->dwarf2_per_objfile
);
9871 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9872 into another compilation unit, at root level. Regard this as a hint,
9874 if (die
->parent
&& die
->parent
->parent
== NULL
9875 && per_cu
->unit_type
== DW_UT_compile
9876 && per_cu
->lang
== language_cplus
)
9879 /* If necessary, add it to the queue and load its DIEs. */
9880 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9881 load_full_comp_unit (per_cu
, false, cu
->language
);
9883 cu
->per_cu
->imported_symtabs_push (per_cu
);
9887 /* RAII object that represents a process_die scope: i.e.,
9888 starts/finishes processing a DIE. */
9889 class process_die_scope
9892 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9893 : m_die (die
), m_cu (cu
)
9895 /* We should only be processing DIEs not already in process. */
9896 gdb_assert (!m_die
->in_process
);
9897 m_die
->in_process
= true;
9900 ~process_die_scope ()
9902 m_die
->in_process
= false;
9904 /* If we're done processing the DIE for the CU that owns the line
9905 header, we don't need the line header anymore. */
9906 if (m_cu
->line_header_die_owner
== m_die
)
9908 delete m_cu
->line_header
;
9909 m_cu
->line_header
= NULL
;
9910 m_cu
->line_header_die_owner
= NULL
;
9919 /* Process a die and its children. */
9922 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9924 process_die_scope
scope (die
, cu
);
9928 case DW_TAG_padding
:
9930 case DW_TAG_compile_unit
:
9931 case DW_TAG_partial_unit
:
9932 read_file_scope (die
, cu
);
9934 case DW_TAG_type_unit
:
9935 read_type_unit_scope (die
, cu
);
9937 case DW_TAG_subprogram
:
9938 /* Nested subprograms in Fortran get a prefix. */
9939 if (cu
->language
== language_fortran
9940 && die
->parent
!= NULL
9941 && die
->parent
->tag
== DW_TAG_subprogram
)
9942 cu
->processing_has_namespace_info
= true;
9944 case DW_TAG_inlined_subroutine
:
9945 read_func_scope (die
, cu
);
9947 case DW_TAG_lexical_block
:
9948 case DW_TAG_try_block
:
9949 case DW_TAG_catch_block
:
9950 read_lexical_block_scope (die
, cu
);
9952 case DW_TAG_call_site
:
9953 case DW_TAG_GNU_call_site
:
9954 read_call_site_scope (die
, cu
);
9956 case DW_TAG_class_type
:
9957 case DW_TAG_interface_type
:
9958 case DW_TAG_structure_type
:
9959 case DW_TAG_union_type
:
9960 process_structure_scope (die
, cu
);
9962 case DW_TAG_enumeration_type
:
9963 process_enumeration_scope (die
, cu
);
9966 /* These dies have a type, but processing them does not create
9967 a symbol or recurse to process the children. Therefore we can
9968 read them on-demand through read_type_die. */
9969 case DW_TAG_subroutine_type
:
9970 case DW_TAG_set_type
:
9971 case DW_TAG_array_type
:
9972 case DW_TAG_pointer_type
:
9973 case DW_TAG_ptr_to_member_type
:
9974 case DW_TAG_reference_type
:
9975 case DW_TAG_rvalue_reference_type
:
9976 case DW_TAG_string_type
:
9979 case DW_TAG_base_type
:
9980 case DW_TAG_subrange_type
:
9981 case DW_TAG_typedef
:
9982 /* Add a typedef symbol for the type definition, if it has a
9984 new_symbol (die
, read_type_die (die
, cu
), cu
);
9986 case DW_TAG_common_block
:
9987 read_common_block (die
, cu
);
9989 case DW_TAG_common_inclusion
:
9991 case DW_TAG_namespace
:
9992 cu
->processing_has_namespace_info
= true;
9993 read_namespace (die
, cu
);
9996 cu
->processing_has_namespace_info
= true;
9997 read_module (die
, cu
);
9999 case DW_TAG_imported_declaration
:
10000 cu
->processing_has_namespace_info
= true;
10001 if (read_namespace_alias (die
, cu
))
10003 /* The declaration is not a global namespace alias. */
10004 /* Fall through. */
10005 case DW_TAG_imported_module
:
10006 cu
->processing_has_namespace_info
= true;
10007 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10008 || cu
->language
!= language_fortran
))
10009 complaint (_("Tag '%s' has unexpected children"),
10010 dwarf_tag_name (die
->tag
));
10011 read_import_statement (die
, cu
);
10014 case DW_TAG_imported_unit
:
10015 process_imported_unit_die (die
, cu
);
10018 case DW_TAG_variable
:
10019 read_variable (die
, cu
);
10023 new_symbol (die
, NULL
, cu
);
10028 /* DWARF name computation. */
10030 /* A helper function for dwarf2_compute_name which determines whether DIE
10031 needs to have the name of the scope prepended to the name listed in the
10035 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10037 struct attribute
*attr
;
10041 case DW_TAG_namespace
:
10042 case DW_TAG_typedef
:
10043 case DW_TAG_class_type
:
10044 case DW_TAG_interface_type
:
10045 case DW_TAG_structure_type
:
10046 case DW_TAG_union_type
:
10047 case DW_TAG_enumeration_type
:
10048 case DW_TAG_enumerator
:
10049 case DW_TAG_subprogram
:
10050 case DW_TAG_inlined_subroutine
:
10051 case DW_TAG_member
:
10052 case DW_TAG_imported_declaration
:
10055 case DW_TAG_variable
:
10056 case DW_TAG_constant
:
10057 /* We only need to prefix "globally" visible variables. These include
10058 any variable marked with DW_AT_external or any variable that
10059 lives in a namespace. [Variables in anonymous namespaces
10060 require prefixing, but they are not DW_AT_external.] */
10062 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10064 struct dwarf2_cu
*spec_cu
= cu
;
10066 return die_needs_namespace (die_specification (die
, &spec_cu
),
10070 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10071 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10072 && die
->parent
->tag
!= DW_TAG_module
)
10074 /* A variable in a lexical block of some kind does not need a
10075 namespace, even though in C++ such variables may be external
10076 and have a mangled name. */
10077 if (die
->parent
->tag
== DW_TAG_lexical_block
10078 || die
->parent
->tag
== DW_TAG_try_block
10079 || die
->parent
->tag
== DW_TAG_catch_block
10080 || die
->parent
->tag
== DW_TAG_subprogram
)
10089 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10090 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10091 defined for the given DIE. */
10093 static struct attribute
*
10094 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10096 struct attribute
*attr
;
10098 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10100 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10105 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10106 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10107 defined for the given DIE. */
10109 static const char *
10110 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10112 const char *linkage_name
;
10114 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10115 if (linkage_name
== NULL
)
10116 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10118 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10119 See https://github.com/rust-lang/rust/issues/32925. */
10120 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10121 && strchr (linkage_name
, '{') != NULL
)
10122 linkage_name
= NULL
;
10124 return linkage_name
;
10127 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10128 compute the physname for the object, which include a method's:
10129 - formal parameters (C++),
10130 - receiver type (Go),
10132 The term "physname" is a bit confusing.
10133 For C++, for example, it is the demangled name.
10134 For Go, for example, it's the mangled name.
10136 For Ada, return the DIE's linkage name rather than the fully qualified
10137 name. PHYSNAME is ignored..
10139 The result is allocated on the objfile_obstack and canonicalized. */
10141 static const char *
10142 dwarf2_compute_name (const char *name
,
10143 struct die_info
*die
, struct dwarf2_cu
*cu
,
10146 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10149 name
= dwarf2_name (die
, cu
);
10151 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10152 but otherwise compute it by typename_concat inside GDB.
10153 FIXME: Actually this is not really true, or at least not always true.
10154 It's all very confusing. compute_and_set_names doesn't try to demangle
10155 Fortran names because there is no mangling standard. So new_symbol
10156 will set the demangled name to the result of dwarf2_full_name, and it is
10157 the demangled name that GDB uses if it exists. */
10158 if (cu
->language
== language_ada
10159 || (cu
->language
== language_fortran
&& physname
))
10161 /* For Ada unit, we prefer the linkage name over the name, as
10162 the former contains the exported name, which the user expects
10163 to be able to reference. Ideally, we want the user to be able
10164 to reference this entity using either natural or linkage name,
10165 but we haven't started looking at this enhancement yet. */
10166 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10168 if (linkage_name
!= NULL
)
10169 return linkage_name
;
10172 /* These are the only languages we know how to qualify names in. */
10174 && (cu
->language
== language_cplus
10175 || cu
->language
== language_fortran
|| cu
->language
== language_d
10176 || cu
->language
== language_rust
))
10178 if (die_needs_namespace (die
, cu
))
10180 const char *prefix
;
10181 const char *canonical_name
= NULL
;
10185 prefix
= determine_prefix (die
, cu
);
10186 if (*prefix
!= '\0')
10188 gdb::unique_xmalloc_ptr
<char> prefixed_name
10189 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10191 buf
.puts (prefixed_name
.get ());
10196 /* Template parameters may be specified in the DIE's DW_AT_name, or
10197 as children with DW_TAG_template_type_param or
10198 DW_TAG_value_type_param. If the latter, add them to the name
10199 here. If the name already has template parameters, then
10200 skip this step; some versions of GCC emit both, and
10201 it is more efficient to use the pre-computed name.
10203 Something to keep in mind about this process: it is very
10204 unlikely, or in some cases downright impossible, to produce
10205 something that will match the mangled name of a function.
10206 If the definition of the function has the same debug info,
10207 we should be able to match up with it anyway. But fallbacks
10208 using the minimal symbol, for instance to find a method
10209 implemented in a stripped copy of libstdc++, will not work.
10210 If we do not have debug info for the definition, we will have to
10211 match them up some other way.
10213 When we do name matching there is a related problem with function
10214 templates; two instantiated function templates are allowed to
10215 differ only by their return types, which we do not add here. */
10217 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10219 struct attribute
*attr
;
10220 struct die_info
*child
;
10223 die
->building_fullname
= 1;
10225 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10229 const gdb_byte
*bytes
;
10230 struct dwarf2_locexpr_baton
*baton
;
10233 if (child
->tag
!= DW_TAG_template_type_param
10234 && child
->tag
!= DW_TAG_template_value_param
)
10245 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10248 complaint (_("template parameter missing DW_AT_type"));
10249 buf
.puts ("UNKNOWN_TYPE");
10252 type
= die_type (child
, cu
);
10254 if (child
->tag
== DW_TAG_template_type_param
)
10256 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10257 &type_print_raw_options
);
10261 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10264 complaint (_("template parameter missing "
10265 "DW_AT_const_value"));
10266 buf
.puts ("UNKNOWN_VALUE");
10270 dwarf2_const_value_attr (attr
, type
, name
,
10271 &cu
->comp_unit_obstack
, cu
,
10272 &value
, &bytes
, &baton
);
10274 if (TYPE_NOSIGN (type
))
10275 /* GDB prints characters as NUMBER 'CHAR'. If that's
10276 changed, this can use value_print instead. */
10277 c_printchar (value
, type
, &buf
);
10280 struct value_print_options opts
;
10283 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10287 else if (bytes
!= NULL
)
10289 v
= allocate_value (type
);
10290 memcpy (value_contents_writeable (v
), bytes
,
10291 TYPE_LENGTH (type
));
10294 v
= value_from_longest (type
, value
);
10296 /* Specify decimal so that we do not depend on
10298 get_formatted_print_options (&opts
, 'd');
10300 value_print (v
, &buf
, &opts
);
10305 die
->building_fullname
= 0;
10309 /* Close the argument list, with a space if necessary
10310 (nested templates). */
10311 if (!buf
.empty () && buf
.string ().back () == '>')
10318 /* For C++ methods, append formal parameter type
10319 information, if PHYSNAME. */
10321 if (physname
&& die
->tag
== DW_TAG_subprogram
10322 && cu
->language
== language_cplus
)
10324 struct type
*type
= read_type_die (die
, cu
);
10326 c_type_print_args (type
, &buf
, 1, cu
->language
,
10327 &type_print_raw_options
);
10329 if (cu
->language
== language_cplus
)
10331 /* Assume that an artificial first parameter is
10332 "this", but do not crash if it is not. RealView
10333 marks unnamed (and thus unused) parameters as
10334 artificial; there is no way to differentiate
10336 if (type
->num_fields () > 0
10337 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10338 && TYPE_FIELD_TYPE (type
, 0)->code () == TYPE_CODE_PTR
10339 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10341 buf
.puts (" const");
10345 const std::string
&intermediate_name
= buf
.string ();
10347 if (cu
->language
== language_cplus
)
10349 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10352 /* If we only computed INTERMEDIATE_NAME, or if
10353 INTERMEDIATE_NAME is already canonical, then we need to
10355 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10356 name
= objfile
->intern (intermediate_name
);
10358 name
= canonical_name
;
10365 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10366 If scope qualifiers are appropriate they will be added. The result
10367 will be allocated on the storage_obstack, or NULL if the DIE does
10368 not have a name. NAME may either be from a previous call to
10369 dwarf2_name or NULL.
10371 The output string will be canonicalized (if C++). */
10373 static const char *
10374 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10376 return dwarf2_compute_name (name
, die
, cu
, 0);
10379 /* Construct a physname for the given DIE in CU. NAME may either be
10380 from a previous call to dwarf2_name or NULL. The result will be
10381 allocated on the objfile_objstack or NULL if the DIE does not have a
10384 The output string will be canonicalized (if C++). */
10386 static const char *
10387 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10389 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10390 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10393 /* In this case dwarf2_compute_name is just a shortcut not building anything
10395 if (!die_needs_namespace (die
, cu
))
10396 return dwarf2_compute_name (name
, die
, cu
, 1);
10398 if (cu
->language
!= language_rust
)
10399 mangled
= dw2_linkage_name (die
, cu
);
10401 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10403 gdb::unique_xmalloc_ptr
<char> demangled
;
10404 if (mangled
!= NULL
)
10407 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10409 /* Do nothing (do not demangle the symbol name). */
10411 else if (cu
->language
== language_go
)
10413 /* This is a lie, but we already lie to the caller new_symbol.
10414 new_symbol assumes we return the mangled name.
10415 This just undoes that lie until things are cleaned up. */
10419 /* Use DMGL_RET_DROP for C++ template functions to suppress
10420 their return type. It is easier for GDB users to search
10421 for such functions as `name(params)' than `long name(params)'.
10422 In such case the minimal symbol names do not match the full
10423 symbol names but for template functions there is never a need
10424 to look up their definition from their declaration so
10425 the only disadvantage remains the minimal symbol variant
10426 `long name(params)' does not have the proper inferior type. */
10427 demangled
.reset (gdb_demangle (mangled
,
10428 (DMGL_PARAMS
| DMGL_ANSI
10429 | DMGL_RET_DROP
)));
10432 canon
= demangled
.get ();
10440 if (canon
== NULL
|| check_physname
)
10442 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10444 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10446 /* It may not mean a bug in GDB. The compiler could also
10447 compute DW_AT_linkage_name incorrectly. But in such case
10448 GDB would need to be bug-to-bug compatible. */
10450 complaint (_("Computed physname <%s> does not match demangled <%s> "
10451 "(from linkage <%s>) - DIE at %s [in module %s]"),
10452 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10453 objfile_name (objfile
));
10455 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10456 is available here - over computed PHYSNAME. It is safer
10457 against both buggy GDB and buggy compilers. */
10471 retval
= objfile
->intern (retval
);
10476 /* Inspect DIE in CU for a namespace alias. If one exists, record
10477 a new symbol for it.
10479 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10482 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10484 struct attribute
*attr
;
10486 /* If the die does not have a name, this is not a namespace
10488 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10492 struct die_info
*d
= die
;
10493 struct dwarf2_cu
*imported_cu
= cu
;
10495 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10496 keep inspecting DIEs until we hit the underlying import. */
10497 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10498 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10500 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10504 d
= follow_die_ref (d
, attr
, &imported_cu
);
10505 if (d
->tag
!= DW_TAG_imported_declaration
)
10509 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10511 complaint (_("DIE at %s has too many recursively imported "
10512 "declarations"), sect_offset_str (d
->sect_off
));
10519 sect_offset sect_off
= attr
->get_ref_die_offset ();
10521 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10522 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10524 /* This declaration is a global namespace alias. Add
10525 a symbol for it whose type is the aliased namespace. */
10526 new_symbol (die
, type
, cu
);
10535 /* Return the using directives repository (global or local?) to use in the
10536 current context for CU.
10538 For Ada, imported declarations can materialize renamings, which *may* be
10539 global. However it is impossible (for now?) in DWARF to distinguish
10540 "external" imported declarations and "static" ones. As all imported
10541 declarations seem to be static in all other languages, make them all CU-wide
10542 global only in Ada. */
10544 static struct using_direct
**
10545 using_directives (struct dwarf2_cu
*cu
)
10547 if (cu
->language
== language_ada
10548 && cu
->get_builder ()->outermost_context_p ())
10549 return cu
->get_builder ()->get_global_using_directives ();
10551 return cu
->get_builder ()->get_local_using_directives ();
10554 /* Read the import statement specified by the given die and record it. */
10557 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10559 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10560 struct attribute
*import_attr
;
10561 struct die_info
*imported_die
, *child_die
;
10562 struct dwarf2_cu
*imported_cu
;
10563 const char *imported_name
;
10564 const char *imported_name_prefix
;
10565 const char *canonical_name
;
10566 const char *import_alias
;
10567 const char *imported_declaration
= NULL
;
10568 const char *import_prefix
;
10569 std::vector
<const char *> excludes
;
10571 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10572 if (import_attr
== NULL
)
10574 complaint (_("Tag '%s' has no DW_AT_import"),
10575 dwarf_tag_name (die
->tag
));
10580 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10581 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10582 if (imported_name
== NULL
)
10584 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10586 The import in the following code:
10600 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10601 <52> DW_AT_decl_file : 1
10602 <53> DW_AT_decl_line : 6
10603 <54> DW_AT_import : <0x75>
10604 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10605 <59> DW_AT_name : B
10606 <5b> DW_AT_decl_file : 1
10607 <5c> DW_AT_decl_line : 2
10608 <5d> DW_AT_type : <0x6e>
10610 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10611 <76> DW_AT_byte_size : 4
10612 <77> DW_AT_encoding : 5 (signed)
10614 imports the wrong die ( 0x75 instead of 0x58 ).
10615 This case will be ignored until the gcc bug is fixed. */
10619 /* Figure out the local name after import. */
10620 import_alias
= dwarf2_name (die
, cu
);
10622 /* Figure out where the statement is being imported to. */
10623 import_prefix
= determine_prefix (die
, cu
);
10625 /* Figure out what the scope of the imported die is and prepend it
10626 to the name of the imported die. */
10627 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10629 if (imported_die
->tag
!= DW_TAG_namespace
10630 && imported_die
->tag
!= DW_TAG_module
)
10632 imported_declaration
= imported_name
;
10633 canonical_name
= imported_name_prefix
;
10635 else if (strlen (imported_name_prefix
) > 0)
10636 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10637 imported_name_prefix
,
10638 (cu
->language
== language_d
? "." : "::"),
10639 imported_name
, (char *) NULL
);
10641 canonical_name
= imported_name
;
10643 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10644 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10645 child_die
= child_die
->sibling
)
10647 /* DWARF-4: A Fortran use statement with a “rename list” may be
10648 represented by an imported module entry with an import attribute
10649 referring to the module and owned entries corresponding to those
10650 entities that are renamed as part of being imported. */
10652 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10654 complaint (_("child DW_TAG_imported_declaration expected "
10655 "- DIE at %s [in module %s]"),
10656 sect_offset_str (child_die
->sect_off
),
10657 objfile_name (objfile
));
10661 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10662 if (import_attr
== NULL
)
10664 complaint (_("Tag '%s' has no DW_AT_import"),
10665 dwarf_tag_name (child_die
->tag
));
10670 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10672 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10673 if (imported_name
== NULL
)
10675 complaint (_("child DW_TAG_imported_declaration has unknown "
10676 "imported name - DIE at %s [in module %s]"),
10677 sect_offset_str (child_die
->sect_off
),
10678 objfile_name (objfile
));
10682 excludes
.push_back (imported_name
);
10684 process_die (child_die
, cu
);
10687 add_using_directive (using_directives (cu
),
10691 imported_declaration
,
10694 &objfile
->objfile_obstack
);
10697 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10698 types, but gives them a size of zero. Starting with version 14,
10699 ICC is compatible with GCC. */
10702 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10704 if (!cu
->checked_producer
)
10705 check_producer (cu
);
10707 return cu
->producer_is_icc_lt_14
;
10710 /* ICC generates a DW_AT_type for C void functions. This was observed on
10711 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10712 which says that void functions should not have a DW_AT_type. */
10715 producer_is_icc (struct dwarf2_cu
*cu
)
10717 if (!cu
->checked_producer
)
10718 check_producer (cu
);
10720 return cu
->producer_is_icc
;
10723 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10724 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10725 this, it was first present in GCC release 4.3.0. */
10728 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10730 if (!cu
->checked_producer
)
10731 check_producer (cu
);
10733 return cu
->producer_is_gcc_lt_4_3
;
10736 static file_and_directory
10737 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10739 file_and_directory res
;
10741 /* Find the filename. Do not use dwarf2_name here, since the filename
10742 is not a source language identifier. */
10743 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10744 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10746 if (res
.comp_dir
== NULL
10747 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10748 && IS_ABSOLUTE_PATH (res
.name
))
10750 res
.comp_dir_storage
= ldirname (res
.name
);
10751 if (!res
.comp_dir_storage
.empty ())
10752 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10754 if (res
.comp_dir
!= NULL
)
10756 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10757 directory, get rid of it. */
10758 const char *cp
= strchr (res
.comp_dir
, ':');
10760 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10761 res
.comp_dir
= cp
+ 1;
10764 if (res
.name
== NULL
)
10765 res
.name
= "<unknown>";
10770 /* Handle DW_AT_stmt_list for a compilation unit.
10771 DIE is the DW_TAG_compile_unit die for CU.
10772 COMP_DIR is the compilation directory. LOWPC is passed to
10773 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10776 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10777 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10779 struct dwarf2_per_objfile
*dwarf2_per_objfile
10780 = cu
->per_cu
->dwarf2_per_objfile
;
10781 struct attribute
*attr
;
10782 struct line_header line_header_local
;
10783 hashval_t line_header_local_hash
;
10785 int decode_mapping
;
10787 gdb_assert (! cu
->per_cu
->is_debug_types
);
10789 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10793 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10795 /* The line header hash table is only created if needed (it exists to
10796 prevent redundant reading of the line table for partial_units).
10797 If we're given a partial_unit, we'll need it. If we're given a
10798 compile_unit, then use the line header hash table if it's already
10799 created, but don't create one just yet. */
10801 if (dwarf2_per_objfile
->line_header_hash
== NULL
10802 && die
->tag
== DW_TAG_partial_unit
)
10804 dwarf2_per_objfile
->line_header_hash
10805 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10806 line_header_eq_voidp
,
10807 free_line_header_voidp
,
10811 line_header_local
.sect_off
= line_offset
;
10812 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10813 line_header_local_hash
= line_header_hash (&line_header_local
);
10814 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10816 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10817 &line_header_local
,
10818 line_header_local_hash
, NO_INSERT
);
10820 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10821 is not present in *SLOT (since if there is something in *SLOT then
10822 it will be for a partial_unit). */
10823 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10825 gdb_assert (*slot
!= NULL
);
10826 cu
->line_header
= (struct line_header
*) *slot
;
10831 /* dwarf_decode_line_header does not yet provide sufficient information.
10832 We always have to call also dwarf_decode_lines for it. */
10833 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10837 cu
->line_header
= lh
.release ();
10838 cu
->line_header_die_owner
= die
;
10840 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10844 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10845 &line_header_local
,
10846 line_header_local_hash
, INSERT
);
10847 gdb_assert (slot
!= NULL
);
10849 if (slot
!= NULL
&& *slot
== NULL
)
10851 /* This newly decoded line number information unit will be owned
10852 by line_header_hash hash table. */
10853 *slot
= cu
->line_header
;
10854 cu
->line_header_die_owner
= NULL
;
10858 /* We cannot free any current entry in (*slot) as that struct line_header
10859 may be already used by multiple CUs. Create only temporary decoded
10860 line_header for this CU - it may happen at most once for each line
10861 number information unit. And if we're not using line_header_hash
10862 then this is what we want as well. */
10863 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10865 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10866 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10871 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10874 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10876 struct dwarf2_per_objfile
*dwarf2_per_objfile
10877 = cu
->per_cu
->dwarf2_per_objfile
;
10878 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10879 struct gdbarch
*gdbarch
= objfile
->arch ();
10880 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10881 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10882 struct attribute
*attr
;
10883 struct die_info
*child_die
;
10884 CORE_ADDR baseaddr
;
10886 prepare_one_comp_unit (cu
, die
, cu
->language
);
10887 baseaddr
= objfile
->text_section_offset ();
10889 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10891 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10892 from finish_block. */
10893 if (lowpc
== ((CORE_ADDR
) -1))
10895 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10897 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10899 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10900 standardised yet. As a workaround for the language detection we fall
10901 back to the DW_AT_producer string. */
10902 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10903 cu
->language
= language_opencl
;
10905 /* Similar hack for Go. */
10906 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10907 set_cu_language (DW_LANG_Go
, cu
);
10909 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10911 /* Decode line number information if present. We do this before
10912 processing child DIEs, so that the line header table is available
10913 for DW_AT_decl_file. */
10914 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10916 /* Process all dies in compilation unit. */
10917 if (die
->child
!= NULL
)
10919 child_die
= die
->child
;
10920 while (child_die
&& child_die
->tag
)
10922 process_die (child_die
, cu
);
10923 child_die
= child_die
->sibling
;
10927 /* Decode macro information, if present. Dwarf 2 macro information
10928 refers to information in the line number info statement program
10929 header, so we can only read it if we've read the header
10931 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10933 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10934 if (attr
&& cu
->line_header
)
10936 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10937 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10939 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10943 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10944 if (attr
&& cu
->line_header
)
10946 unsigned int macro_offset
= DW_UNSND (attr
);
10948 dwarf_decode_macros (cu
, macro_offset
, 0);
10954 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10956 struct type_unit_group
*tu_group
;
10958 struct attribute
*attr
;
10960 struct signatured_type
*sig_type
;
10962 gdb_assert (per_cu
->is_debug_types
);
10963 sig_type
= (struct signatured_type
*) per_cu
;
10965 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10967 /* If we're using .gdb_index (includes -readnow) then
10968 per_cu->type_unit_group may not have been set up yet. */
10969 if (sig_type
->type_unit_group
== NULL
)
10970 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10971 tu_group
= sig_type
->type_unit_group
;
10973 /* If we've already processed this stmt_list there's no real need to
10974 do it again, we could fake it and just recreate the part we need
10975 (file name,index -> symtab mapping). If data shows this optimization
10976 is useful we can do it then. */
10977 first_time
= tu_group
->compunit_symtab
== NULL
;
10979 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10984 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10985 lh
= dwarf_decode_line_header (line_offset
, this);
10990 start_symtab ("", NULL
, 0);
10993 gdb_assert (tu_group
->symtabs
== NULL
);
10994 gdb_assert (m_builder
== nullptr);
10995 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10996 m_builder
.reset (new struct buildsym_compunit
10997 (COMPUNIT_OBJFILE (cust
), "",
10998 COMPUNIT_DIRNAME (cust
),
10999 compunit_language (cust
),
11001 list_in_scope
= get_builder ()->get_file_symbols ();
11006 line_header
= lh
.release ();
11007 line_header_die_owner
= die
;
11011 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11013 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11014 still initializing it, and our caller (a few levels up)
11015 process_full_type_unit still needs to know if this is the first
11019 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11020 struct symtab
*, line_header
->file_names_size ());
11022 auto &file_names
= line_header
->file_names ();
11023 for (i
= 0; i
< file_names
.size (); ++i
)
11025 file_entry
&fe
= file_names
[i
];
11026 dwarf2_start_subfile (this, fe
.name
,
11027 fe
.include_dir (line_header
));
11028 buildsym_compunit
*b
= get_builder ();
11029 if (b
->get_current_subfile ()->symtab
== NULL
)
11031 /* NOTE: start_subfile will recognize when it's been
11032 passed a file it has already seen. So we can't
11033 assume there's a simple mapping from
11034 cu->line_header->file_names to subfiles, plus
11035 cu->line_header->file_names may contain dups. */
11036 b
->get_current_subfile ()->symtab
11037 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11040 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11041 tu_group
->symtabs
[i
] = fe
.symtab
;
11046 gdb_assert (m_builder
== nullptr);
11047 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11048 m_builder
.reset (new struct buildsym_compunit
11049 (COMPUNIT_OBJFILE (cust
), "",
11050 COMPUNIT_DIRNAME (cust
),
11051 compunit_language (cust
),
11053 list_in_scope
= get_builder ()->get_file_symbols ();
11055 auto &file_names
= line_header
->file_names ();
11056 for (i
= 0; i
< file_names
.size (); ++i
)
11058 file_entry
&fe
= file_names
[i
];
11059 fe
.symtab
= tu_group
->symtabs
[i
];
11063 /* The main symtab is allocated last. Type units don't have DW_AT_name
11064 so they don't have a "real" (so to speak) symtab anyway.
11065 There is later code that will assign the main symtab to all symbols
11066 that don't have one. We need to handle the case of a symbol with a
11067 missing symtab (DW_AT_decl_file) anyway. */
11070 /* Process DW_TAG_type_unit.
11071 For TUs we want to skip the first top level sibling if it's not the
11072 actual type being defined by this TU. In this case the first top
11073 level sibling is there to provide context only. */
11076 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11078 struct die_info
*child_die
;
11080 prepare_one_comp_unit (cu
, die
, language_minimal
);
11082 /* Initialize (or reinitialize) the machinery for building symtabs.
11083 We do this before processing child DIEs, so that the line header table
11084 is available for DW_AT_decl_file. */
11085 cu
->setup_type_unit_groups (die
);
11087 if (die
->child
!= NULL
)
11089 child_die
= die
->child
;
11090 while (child_die
&& child_die
->tag
)
11092 process_die (child_die
, cu
);
11093 child_die
= child_die
->sibling
;
11100 http://gcc.gnu.org/wiki/DebugFission
11101 http://gcc.gnu.org/wiki/DebugFissionDWP
11103 To simplify handling of both DWO files ("object" files with the DWARF info)
11104 and DWP files (a file with the DWOs packaged up into one file), we treat
11105 DWP files as having a collection of virtual DWO files. */
11108 hash_dwo_file (const void *item
)
11110 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11113 hash
= htab_hash_string (dwo_file
->dwo_name
);
11114 if (dwo_file
->comp_dir
!= NULL
)
11115 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11120 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11122 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11123 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11125 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11127 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11128 return lhs
->comp_dir
== rhs
->comp_dir
;
11129 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11132 /* Allocate a hash table for DWO files. */
11135 allocate_dwo_file_hash_table ()
11137 auto delete_dwo_file
= [] (void *item
)
11139 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11144 return htab_up (htab_create_alloc (41,
11151 /* Lookup DWO file DWO_NAME. */
11154 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11155 const char *dwo_name
,
11156 const char *comp_dir
)
11158 struct dwo_file find_entry
;
11161 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11162 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
11164 find_entry
.dwo_name
= dwo_name
;
11165 find_entry
.comp_dir
= comp_dir
;
11166 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11173 hash_dwo_unit (const void *item
)
11175 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11177 /* This drops the top 32 bits of the id, but is ok for a hash. */
11178 return dwo_unit
->signature
;
11182 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11184 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11185 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11187 /* The signature is assumed to be unique within the DWO file.
11188 So while object file CU dwo_id's always have the value zero,
11189 that's OK, assuming each object file DWO file has only one CU,
11190 and that's the rule for now. */
11191 return lhs
->signature
== rhs
->signature
;
11194 /* Allocate a hash table for DWO CUs,TUs.
11195 There is one of these tables for each of CUs,TUs for each DWO file. */
11198 allocate_dwo_unit_table ()
11200 /* Start out with a pretty small number.
11201 Generally DWO files contain only one CU and maybe some TUs. */
11202 return htab_up (htab_create_alloc (3,
11205 NULL
, xcalloc
, xfree
));
11208 /* die_reader_func for create_dwo_cu. */
11211 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11212 const gdb_byte
*info_ptr
,
11213 struct die_info
*comp_unit_die
,
11214 struct dwo_file
*dwo_file
,
11215 struct dwo_unit
*dwo_unit
)
11217 struct dwarf2_cu
*cu
= reader
->cu
;
11218 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11219 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11221 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11222 if (!signature
.has_value ())
11224 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11225 " its dwo_id [in module %s]"),
11226 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11230 dwo_unit
->dwo_file
= dwo_file
;
11231 dwo_unit
->signature
= *signature
;
11232 dwo_unit
->section
= section
;
11233 dwo_unit
->sect_off
= sect_off
;
11234 dwo_unit
->length
= cu
->per_cu
->length
;
11236 if (dwarf_read_debug
)
11237 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11238 sect_offset_str (sect_off
),
11239 hex_string (dwo_unit
->signature
));
11242 /* Create the dwo_units for the CUs in a DWO_FILE.
11243 Note: This function processes DWO files only, not DWP files. */
11246 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11247 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11248 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11250 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11251 const gdb_byte
*info_ptr
, *end_ptr
;
11253 section
.read (objfile
);
11254 info_ptr
= section
.buffer
;
11256 if (info_ptr
== NULL
)
11259 if (dwarf_read_debug
)
11261 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11262 section
.get_name (),
11263 section
.get_file_name ());
11266 end_ptr
= info_ptr
+ section
.size
;
11267 while (info_ptr
< end_ptr
)
11269 struct dwarf2_per_cu_data per_cu
;
11270 struct dwo_unit read_unit
{};
11271 struct dwo_unit
*dwo_unit
;
11273 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11275 memset (&per_cu
, 0, sizeof (per_cu
));
11276 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11277 per_cu
.is_debug_types
= 0;
11278 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11279 per_cu
.section
= §ion
;
11281 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11282 if (!reader
.dummy_p
)
11283 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11284 &dwo_file
, &read_unit
);
11285 info_ptr
+= per_cu
.length
;
11287 // If the unit could not be parsed, skip it.
11288 if (read_unit
.dwo_file
== NULL
)
11291 if (cus_htab
== NULL
)
11292 cus_htab
= allocate_dwo_unit_table ();
11294 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11295 *dwo_unit
= read_unit
;
11296 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11297 gdb_assert (slot
!= NULL
);
11300 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11301 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11303 complaint (_("debug cu entry at offset %s is duplicate to"
11304 " the entry at offset %s, signature %s"),
11305 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11306 hex_string (dwo_unit
->signature
));
11308 *slot
= (void *)dwo_unit
;
11312 /* DWP file .debug_{cu,tu}_index section format:
11313 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11317 Both index sections have the same format, and serve to map a 64-bit
11318 signature to a set of section numbers. Each section begins with a header,
11319 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11320 indexes, and a pool of 32-bit section numbers. The index sections will be
11321 aligned at 8-byte boundaries in the file.
11323 The index section header consists of:
11325 V, 32 bit version number
11327 N, 32 bit number of compilation units or type units in the index
11328 M, 32 bit number of slots in the hash table
11330 Numbers are recorded using the byte order of the application binary.
11332 The hash table begins at offset 16 in the section, and consists of an array
11333 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11334 order of the application binary). Unused slots in the hash table are 0.
11335 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11337 The parallel table begins immediately after the hash table
11338 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11339 array of 32-bit indexes (using the byte order of the application binary),
11340 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11341 table contains a 32-bit index into the pool of section numbers. For unused
11342 hash table slots, the corresponding entry in the parallel table will be 0.
11344 The pool of section numbers begins immediately following the hash table
11345 (at offset 16 + 12 * M from the beginning of the section). The pool of
11346 section numbers consists of an array of 32-bit words (using the byte order
11347 of the application binary). Each item in the array is indexed starting
11348 from 0. The hash table entry provides the index of the first section
11349 number in the set. Additional section numbers in the set follow, and the
11350 set is terminated by a 0 entry (section number 0 is not used in ELF).
11352 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11353 section must be the first entry in the set, and the .debug_abbrev.dwo must
11354 be the second entry. Other members of the set may follow in any order.
11360 DWP Version 2 combines all the .debug_info, etc. sections into one,
11361 and the entries in the index tables are now offsets into these sections.
11362 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11365 Index Section Contents:
11367 Hash Table of Signatures dwp_hash_table.hash_table
11368 Parallel Table of Indices dwp_hash_table.unit_table
11369 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11370 Table of Section Sizes dwp_hash_table.v2.sizes
11372 The index section header consists of:
11374 V, 32 bit version number
11375 L, 32 bit number of columns in the table of section offsets
11376 N, 32 bit number of compilation units or type units in the index
11377 M, 32 bit number of slots in the hash table
11379 Numbers are recorded using the byte order of the application binary.
11381 The hash table has the same format as version 1.
11382 The parallel table of indices has the same format as version 1,
11383 except that the entries are origin-1 indices into the table of sections
11384 offsets and the table of section sizes.
11386 The table of offsets begins immediately following the parallel table
11387 (at offset 16 + 12 * M from the beginning of the section). The table is
11388 a two-dimensional array of 32-bit words (using the byte order of the
11389 application binary), with L columns and N+1 rows, in row-major order.
11390 Each row in the array is indexed starting from 0. The first row provides
11391 a key to the remaining rows: each column in this row provides an identifier
11392 for a debug section, and the offsets in the same column of subsequent rows
11393 refer to that section. The section identifiers are:
11395 DW_SECT_INFO 1 .debug_info.dwo
11396 DW_SECT_TYPES 2 .debug_types.dwo
11397 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11398 DW_SECT_LINE 4 .debug_line.dwo
11399 DW_SECT_LOC 5 .debug_loc.dwo
11400 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11401 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11402 DW_SECT_MACRO 8 .debug_macro.dwo
11404 The offsets provided by the CU and TU index sections are the base offsets
11405 for the contributions made by each CU or TU to the corresponding section
11406 in the package file. Each CU and TU header contains an abbrev_offset
11407 field, used to find the abbreviations table for that CU or TU within the
11408 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11409 be interpreted as relative to the base offset given in the index section.
11410 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11411 should be interpreted as relative to the base offset for .debug_line.dwo,
11412 and offsets into other debug sections obtained from DWARF attributes should
11413 also be interpreted as relative to the corresponding base offset.
11415 The table of sizes begins immediately following the table of offsets.
11416 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11417 with L columns and N rows, in row-major order. Each row in the array is
11418 indexed starting from 1 (row 0 is shared by the two tables).
11422 Hash table lookup is handled the same in version 1 and 2:
11424 We assume that N and M will not exceed 2^32 - 1.
11425 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11427 Given a 64-bit compilation unit signature or a type signature S, an entry
11428 in the hash table is located as follows:
11430 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11431 the low-order k bits all set to 1.
11433 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11435 3) If the hash table entry at index H matches the signature, use that
11436 entry. If the hash table entry at index H is unused (all zeroes),
11437 terminate the search: the signature is not present in the table.
11439 4) Let H = (H + H') modulo M. Repeat at Step 3.
11441 Because M > N and H' and M are relatively prime, the search is guaranteed
11442 to stop at an unused slot or find the match. */
11444 /* Create a hash table to map DWO IDs to their CU/TU entry in
11445 .debug_{info,types}.dwo in DWP_FILE.
11446 Returns NULL if there isn't one.
11447 Note: This function processes DWP files only, not DWO files. */
11449 static struct dwp_hash_table
*
11450 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11451 struct dwp_file
*dwp_file
, int is_debug_types
)
11453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11454 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11455 const gdb_byte
*index_ptr
, *index_end
;
11456 struct dwarf2_section_info
*index
;
11457 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11458 struct dwp_hash_table
*htab
;
11460 if (is_debug_types
)
11461 index
= &dwp_file
->sections
.tu_index
;
11463 index
= &dwp_file
->sections
.cu_index
;
11465 if (index
->empty ())
11467 index
->read (objfile
);
11469 index_ptr
= index
->buffer
;
11470 index_end
= index_ptr
+ index
->size
;
11472 version
= read_4_bytes (dbfd
, index_ptr
);
11475 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11479 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11481 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11484 if (version
!= 1 && version
!= 2)
11486 error (_("Dwarf Error: unsupported DWP file version (%s)"
11487 " [in module %s]"),
11488 pulongest (version
), dwp_file
->name
);
11490 if (nr_slots
!= (nr_slots
& -nr_slots
))
11492 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11493 " is not power of 2 [in module %s]"),
11494 pulongest (nr_slots
), dwp_file
->name
);
11497 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11498 htab
->version
= version
;
11499 htab
->nr_columns
= nr_columns
;
11500 htab
->nr_units
= nr_units
;
11501 htab
->nr_slots
= nr_slots
;
11502 htab
->hash_table
= index_ptr
;
11503 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11505 /* Exit early if the table is empty. */
11506 if (nr_slots
== 0 || nr_units
== 0
11507 || (version
== 2 && nr_columns
== 0))
11509 /* All must be zero. */
11510 if (nr_slots
!= 0 || nr_units
!= 0
11511 || (version
== 2 && nr_columns
!= 0))
11513 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11514 " all zero [in modules %s]"),
11522 htab
->section_pool
.v1
.indices
=
11523 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11524 /* It's harder to decide whether the section is too small in v1.
11525 V1 is deprecated anyway so we punt. */
11529 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11530 int *ids
= htab
->section_pool
.v2
.section_ids
;
11531 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11532 /* Reverse map for error checking. */
11533 int ids_seen
[DW_SECT_MAX
+ 1];
11536 if (nr_columns
< 2)
11538 error (_("Dwarf Error: bad DWP hash table, too few columns"
11539 " in section table [in module %s]"),
11542 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11544 error (_("Dwarf Error: bad DWP hash table, too many columns"
11545 " in section table [in module %s]"),
11548 memset (ids
, 255, sizeof_ids
);
11549 memset (ids_seen
, 255, sizeof (ids_seen
));
11550 for (i
= 0; i
< nr_columns
; ++i
)
11552 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11554 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11556 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11557 " in section table [in module %s]"),
11558 id
, dwp_file
->name
);
11560 if (ids_seen
[id
] != -1)
11562 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11563 " id %d in section table [in module %s]"),
11564 id
, dwp_file
->name
);
11569 /* Must have exactly one info or types section. */
11570 if (((ids_seen
[DW_SECT_INFO
] != -1)
11571 + (ids_seen
[DW_SECT_TYPES
] != -1))
11574 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11575 " DWO info/types section [in module %s]"),
11578 /* Must have an abbrev section. */
11579 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11581 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11582 " section [in module %s]"),
11585 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11586 htab
->section_pool
.v2
.sizes
=
11587 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11588 * nr_units
* nr_columns
);
11589 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11590 * nr_units
* nr_columns
))
11593 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11594 " [in module %s]"),
11602 /* Update SECTIONS with the data from SECTP.
11604 This function is like the other "locate" section routines that are
11605 passed to bfd_map_over_sections, but in this context the sections to
11606 read comes from the DWP V1 hash table, not the full ELF section table.
11608 The result is non-zero for success, or zero if an error was found. */
11611 locate_v1_virtual_dwo_sections (asection
*sectp
,
11612 struct virtual_v1_dwo_sections
*sections
)
11614 const struct dwop_section_names
*names
= &dwop_section_names
;
11616 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11618 /* There can be only one. */
11619 if (sections
->abbrev
.s
.section
!= NULL
)
11621 sections
->abbrev
.s
.section
= sectp
;
11622 sections
->abbrev
.size
= bfd_section_size (sectp
);
11624 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11625 || section_is_p (sectp
->name
, &names
->types_dwo
))
11627 /* There can be only one. */
11628 if (sections
->info_or_types
.s
.section
!= NULL
)
11630 sections
->info_or_types
.s
.section
= sectp
;
11631 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11633 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11635 /* There can be only one. */
11636 if (sections
->line
.s
.section
!= NULL
)
11638 sections
->line
.s
.section
= sectp
;
11639 sections
->line
.size
= bfd_section_size (sectp
);
11641 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11643 /* There can be only one. */
11644 if (sections
->loc
.s
.section
!= NULL
)
11646 sections
->loc
.s
.section
= sectp
;
11647 sections
->loc
.size
= bfd_section_size (sectp
);
11649 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11651 /* There can be only one. */
11652 if (sections
->macinfo
.s
.section
!= NULL
)
11654 sections
->macinfo
.s
.section
= sectp
;
11655 sections
->macinfo
.size
= bfd_section_size (sectp
);
11657 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11659 /* There can be only one. */
11660 if (sections
->macro
.s
.section
!= NULL
)
11662 sections
->macro
.s
.section
= sectp
;
11663 sections
->macro
.size
= bfd_section_size (sectp
);
11665 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11667 /* There can be only one. */
11668 if (sections
->str_offsets
.s
.section
!= NULL
)
11670 sections
->str_offsets
.s
.section
= sectp
;
11671 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11675 /* No other kind of section is valid. */
11682 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11683 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11684 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11685 This is for DWP version 1 files. */
11687 static struct dwo_unit
*
11688 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11689 struct dwp_file
*dwp_file
,
11690 uint32_t unit_index
,
11691 const char *comp_dir
,
11692 ULONGEST signature
, int is_debug_types
)
11694 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11695 const struct dwp_hash_table
*dwp_htab
=
11696 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11697 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11698 const char *kind
= is_debug_types
? "TU" : "CU";
11699 struct dwo_file
*dwo_file
;
11700 struct dwo_unit
*dwo_unit
;
11701 struct virtual_v1_dwo_sections sections
;
11702 void **dwo_file_slot
;
11705 gdb_assert (dwp_file
->version
== 1);
11707 if (dwarf_read_debug
)
11709 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11711 pulongest (unit_index
), hex_string (signature
),
11715 /* Fetch the sections of this DWO unit.
11716 Put a limit on the number of sections we look for so that bad data
11717 doesn't cause us to loop forever. */
11719 #define MAX_NR_V1_DWO_SECTIONS \
11720 (1 /* .debug_info or .debug_types */ \
11721 + 1 /* .debug_abbrev */ \
11722 + 1 /* .debug_line */ \
11723 + 1 /* .debug_loc */ \
11724 + 1 /* .debug_str_offsets */ \
11725 + 1 /* .debug_macro or .debug_macinfo */ \
11726 + 1 /* trailing zero */)
11728 memset (§ions
, 0, sizeof (sections
));
11730 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11733 uint32_t section_nr
=
11734 read_4_bytes (dbfd
,
11735 dwp_htab
->section_pool
.v1
.indices
11736 + (unit_index
+ i
) * sizeof (uint32_t));
11738 if (section_nr
== 0)
11740 if (section_nr
>= dwp_file
->num_sections
)
11742 error (_("Dwarf Error: bad DWP hash table, section number too large"
11743 " [in module %s]"),
11747 sectp
= dwp_file
->elf_sections
[section_nr
];
11748 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11750 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11751 " [in module %s]"),
11757 || sections
.info_or_types
.empty ()
11758 || sections
.abbrev
.empty ())
11760 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11761 " [in module %s]"),
11764 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11766 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11767 " [in module %s]"),
11771 /* It's easier for the rest of the code if we fake a struct dwo_file and
11772 have dwo_unit "live" in that. At least for now.
11774 The DWP file can be made up of a random collection of CUs and TUs.
11775 However, for each CU + set of TUs that came from the same original DWO
11776 file, we can combine them back into a virtual DWO file to save space
11777 (fewer struct dwo_file objects to allocate). Remember that for really
11778 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11780 std::string virtual_dwo_name
=
11781 string_printf ("virtual-dwo/%d-%d-%d-%d",
11782 sections
.abbrev
.get_id (),
11783 sections
.line
.get_id (),
11784 sections
.loc
.get_id (),
11785 sections
.str_offsets
.get_id ());
11786 /* Can we use an existing virtual DWO file? */
11787 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11788 virtual_dwo_name
.c_str (),
11790 /* Create one if necessary. */
11791 if (*dwo_file_slot
== NULL
)
11793 if (dwarf_read_debug
)
11795 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11796 virtual_dwo_name
.c_str ());
11798 dwo_file
= new struct dwo_file
;
11799 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11800 dwo_file
->comp_dir
= comp_dir
;
11801 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11802 dwo_file
->sections
.line
= sections
.line
;
11803 dwo_file
->sections
.loc
= sections
.loc
;
11804 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11805 dwo_file
->sections
.macro
= sections
.macro
;
11806 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11807 /* The "str" section is global to the entire DWP file. */
11808 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11809 /* The info or types section is assigned below to dwo_unit,
11810 there's no need to record it in dwo_file.
11811 Also, we can't simply record type sections in dwo_file because
11812 we record a pointer into the vector in dwo_unit. As we collect more
11813 types we'll grow the vector and eventually have to reallocate space
11814 for it, invalidating all copies of pointers into the previous
11816 *dwo_file_slot
= dwo_file
;
11820 if (dwarf_read_debug
)
11822 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11823 virtual_dwo_name
.c_str ());
11825 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11828 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11829 dwo_unit
->dwo_file
= dwo_file
;
11830 dwo_unit
->signature
= signature
;
11831 dwo_unit
->section
=
11832 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11833 *dwo_unit
->section
= sections
.info_or_types
;
11834 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11839 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11840 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11841 piece within that section used by a TU/CU, return a virtual section
11842 of just that piece. */
11844 static struct dwarf2_section_info
11845 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11846 struct dwarf2_section_info
*section
,
11847 bfd_size_type offset
, bfd_size_type size
)
11849 struct dwarf2_section_info result
;
11852 gdb_assert (section
!= NULL
);
11853 gdb_assert (!section
->is_virtual
);
11855 memset (&result
, 0, sizeof (result
));
11856 result
.s
.containing_section
= section
;
11857 result
.is_virtual
= true;
11862 sectp
= section
->get_bfd_section ();
11864 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11865 bounds of the real section. This is a pretty-rare event, so just
11866 flag an error (easier) instead of a warning and trying to cope. */
11868 || offset
+ size
> bfd_section_size (sectp
))
11870 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11871 " in section %s [in module %s]"),
11872 sectp
? bfd_section_name (sectp
) : "<unknown>",
11873 objfile_name (dwarf2_per_objfile
->objfile
));
11876 result
.virtual_offset
= offset
;
11877 result
.size
= size
;
11881 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11882 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11883 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11884 This is for DWP version 2 files. */
11886 static struct dwo_unit
*
11887 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11888 struct dwp_file
*dwp_file
,
11889 uint32_t unit_index
,
11890 const char *comp_dir
,
11891 ULONGEST signature
, int is_debug_types
)
11893 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11894 const struct dwp_hash_table
*dwp_htab
=
11895 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11896 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11897 const char *kind
= is_debug_types
? "TU" : "CU";
11898 struct dwo_file
*dwo_file
;
11899 struct dwo_unit
*dwo_unit
;
11900 struct virtual_v2_dwo_sections sections
;
11901 void **dwo_file_slot
;
11904 gdb_assert (dwp_file
->version
== 2);
11906 if (dwarf_read_debug
)
11908 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11910 pulongest (unit_index
), hex_string (signature
),
11914 /* Fetch the section offsets of this DWO unit. */
11916 memset (§ions
, 0, sizeof (sections
));
11918 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11920 uint32_t offset
= read_4_bytes (dbfd
,
11921 dwp_htab
->section_pool
.v2
.offsets
11922 + (((unit_index
- 1) * dwp_htab
->nr_columns
11924 * sizeof (uint32_t)));
11925 uint32_t size
= read_4_bytes (dbfd
,
11926 dwp_htab
->section_pool
.v2
.sizes
11927 + (((unit_index
- 1) * dwp_htab
->nr_columns
11929 * sizeof (uint32_t)));
11931 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11934 case DW_SECT_TYPES
:
11935 sections
.info_or_types_offset
= offset
;
11936 sections
.info_or_types_size
= size
;
11938 case DW_SECT_ABBREV
:
11939 sections
.abbrev_offset
= offset
;
11940 sections
.abbrev_size
= size
;
11943 sections
.line_offset
= offset
;
11944 sections
.line_size
= size
;
11947 sections
.loc_offset
= offset
;
11948 sections
.loc_size
= size
;
11950 case DW_SECT_STR_OFFSETS
:
11951 sections
.str_offsets_offset
= offset
;
11952 sections
.str_offsets_size
= size
;
11954 case DW_SECT_MACINFO
:
11955 sections
.macinfo_offset
= offset
;
11956 sections
.macinfo_size
= size
;
11958 case DW_SECT_MACRO
:
11959 sections
.macro_offset
= offset
;
11960 sections
.macro_size
= size
;
11965 /* It's easier for the rest of the code if we fake a struct dwo_file and
11966 have dwo_unit "live" in that. At least for now.
11968 The DWP file can be made up of a random collection of CUs and TUs.
11969 However, for each CU + set of TUs that came from the same original DWO
11970 file, we can combine them back into a virtual DWO file to save space
11971 (fewer struct dwo_file objects to allocate). Remember that for really
11972 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11974 std::string virtual_dwo_name
=
11975 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11976 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11977 (long) (sections
.line_size
? sections
.line_offset
: 0),
11978 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11979 (long) (sections
.str_offsets_size
11980 ? sections
.str_offsets_offset
: 0));
11981 /* Can we use an existing virtual DWO file? */
11982 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11983 virtual_dwo_name
.c_str (),
11985 /* Create one if necessary. */
11986 if (*dwo_file_slot
== NULL
)
11988 if (dwarf_read_debug
)
11990 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11991 virtual_dwo_name
.c_str ());
11993 dwo_file
= new struct dwo_file
;
11994 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11995 dwo_file
->comp_dir
= comp_dir
;
11996 dwo_file
->sections
.abbrev
=
11997 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11998 sections
.abbrev_offset
, sections
.abbrev_size
);
11999 dwo_file
->sections
.line
=
12000 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12001 sections
.line_offset
, sections
.line_size
);
12002 dwo_file
->sections
.loc
=
12003 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12004 sections
.loc_offset
, sections
.loc_size
);
12005 dwo_file
->sections
.macinfo
=
12006 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12007 sections
.macinfo_offset
, sections
.macinfo_size
);
12008 dwo_file
->sections
.macro
=
12009 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12010 sections
.macro_offset
, sections
.macro_size
);
12011 dwo_file
->sections
.str_offsets
=
12012 create_dwp_v2_section (dwarf2_per_objfile
,
12013 &dwp_file
->sections
.str_offsets
,
12014 sections
.str_offsets_offset
,
12015 sections
.str_offsets_size
);
12016 /* The "str" section is global to the entire DWP file. */
12017 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12018 /* The info or types section is assigned below to dwo_unit,
12019 there's no need to record it in dwo_file.
12020 Also, we can't simply record type sections in dwo_file because
12021 we record a pointer into the vector in dwo_unit. As we collect more
12022 types we'll grow the vector and eventually have to reallocate space
12023 for it, invalidating all copies of pointers into the previous
12025 *dwo_file_slot
= dwo_file
;
12029 if (dwarf_read_debug
)
12031 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12032 virtual_dwo_name
.c_str ());
12034 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12037 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12038 dwo_unit
->dwo_file
= dwo_file
;
12039 dwo_unit
->signature
= signature
;
12040 dwo_unit
->section
=
12041 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12042 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12044 ? &dwp_file
->sections
.types
12045 : &dwp_file
->sections
.info
,
12046 sections
.info_or_types_offset
,
12047 sections
.info_or_types_size
);
12048 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12053 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12054 Returns NULL if the signature isn't found. */
12056 static struct dwo_unit
*
12057 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12058 struct dwp_file
*dwp_file
, const char *comp_dir
,
12059 ULONGEST signature
, int is_debug_types
)
12061 const struct dwp_hash_table
*dwp_htab
=
12062 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12063 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12064 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12065 uint32_t hash
= signature
& mask
;
12066 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12069 struct dwo_unit find_dwo_cu
;
12071 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12072 find_dwo_cu
.signature
= signature
;
12073 slot
= htab_find_slot (is_debug_types
12074 ? dwp_file
->loaded_tus
.get ()
12075 : dwp_file
->loaded_cus
.get (),
12076 &find_dwo_cu
, INSERT
);
12079 return (struct dwo_unit
*) *slot
;
12081 /* Use a for loop so that we don't loop forever on bad debug info. */
12082 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12084 ULONGEST signature_in_table
;
12086 signature_in_table
=
12087 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12088 if (signature_in_table
== signature
)
12090 uint32_t unit_index
=
12091 read_4_bytes (dbfd
,
12092 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12094 if (dwp_file
->version
== 1)
12096 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12097 dwp_file
, unit_index
,
12098 comp_dir
, signature
,
12103 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12104 dwp_file
, unit_index
,
12105 comp_dir
, signature
,
12108 return (struct dwo_unit
*) *slot
;
12110 if (signature_in_table
== 0)
12112 hash
= (hash
+ hash2
) & mask
;
12115 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12116 " [in module %s]"),
12120 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12121 Open the file specified by FILE_NAME and hand it off to BFD for
12122 preliminary analysis. Return a newly initialized bfd *, which
12123 includes a canonicalized copy of FILE_NAME.
12124 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12125 SEARCH_CWD is true if the current directory is to be searched.
12126 It will be searched before debug-file-directory.
12127 If successful, the file is added to the bfd include table of the
12128 objfile's bfd (see gdb_bfd_record_inclusion).
12129 If unable to find/open the file, return NULL.
12130 NOTE: This function is derived from symfile_bfd_open. */
12132 static gdb_bfd_ref_ptr
12133 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12134 const char *file_name
, int is_dwp
, int search_cwd
)
12137 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12138 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12139 to debug_file_directory. */
12140 const char *search_path
;
12141 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12143 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12146 if (*debug_file_directory
!= '\0')
12148 search_path_holder
.reset (concat (".", dirname_separator_string
,
12149 debug_file_directory
,
12151 search_path
= search_path_holder
.get ();
12157 search_path
= debug_file_directory
;
12159 openp_flags flags
= OPF_RETURN_REALPATH
;
12161 flags
|= OPF_SEARCH_IN_PATH
;
12163 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12164 desc
= openp (search_path
, flags
, file_name
,
12165 O_RDONLY
| O_BINARY
, &absolute_name
);
12169 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12171 if (sym_bfd
== NULL
)
12173 bfd_set_cacheable (sym_bfd
.get (), 1);
12175 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12178 /* Success. Record the bfd as having been included by the objfile's bfd.
12179 This is important because things like demangled_names_hash lives in the
12180 objfile's per_bfd space and may have references to things like symbol
12181 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12182 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12187 /* Try to open DWO file FILE_NAME.
12188 COMP_DIR is the DW_AT_comp_dir attribute.
12189 The result is the bfd handle of the file.
12190 If there is a problem finding or opening the file, return NULL.
12191 Upon success, the canonicalized path of the file is stored in the bfd,
12192 same as symfile_bfd_open. */
12194 static gdb_bfd_ref_ptr
12195 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12196 const char *file_name
, const char *comp_dir
)
12198 if (IS_ABSOLUTE_PATH (file_name
))
12199 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12200 0 /*is_dwp*/, 0 /*search_cwd*/);
12202 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12204 if (comp_dir
!= NULL
)
12206 gdb::unique_xmalloc_ptr
<char> path_to_try
12207 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12209 /* NOTE: If comp_dir is a relative path, this will also try the
12210 search path, which seems useful. */
12211 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12212 path_to_try
.get (),
12214 1 /*search_cwd*/));
12219 /* That didn't work, try debug-file-directory, which, despite its name,
12220 is a list of paths. */
12222 if (*debug_file_directory
== '\0')
12225 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12226 0 /*is_dwp*/, 1 /*search_cwd*/);
12229 /* This function is mapped across the sections and remembers the offset and
12230 size of each of the DWO debugging sections we are interested in. */
12233 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12235 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12236 const struct dwop_section_names
*names
= &dwop_section_names
;
12238 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12240 dwo_sections
->abbrev
.s
.section
= sectp
;
12241 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12243 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12245 dwo_sections
->info
.s
.section
= sectp
;
12246 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12248 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12250 dwo_sections
->line
.s
.section
= sectp
;
12251 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12253 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12255 dwo_sections
->loc
.s
.section
= sectp
;
12256 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12258 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12260 dwo_sections
->loclists
.s
.section
= sectp
;
12261 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12263 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12265 dwo_sections
->macinfo
.s
.section
= sectp
;
12266 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12268 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12270 dwo_sections
->macro
.s
.section
= sectp
;
12271 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12273 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12275 dwo_sections
->str
.s
.section
= sectp
;
12276 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12278 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12280 dwo_sections
->str_offsets
.s
.section
= sectp
;
12281 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12283 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12285 struct dwarf2_section_info type_section
;
12287 memset (&type_section
, 0, sizeof (type_section
));
12288 type_section
.s
.section
= sectp
;
12289 type_section
.size
= bfd_section_size (sectp
);
12290 dwo_sections
->types
.push_back (type_section
);
12294 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12295 by PER_CU. This is for the non-DWP case.
12296 The result is NULL if DWO_NAME can't be found. */
12298 static struct dwo_file
*
12299 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12300 const char *dwo_name
, const char *comp_dir
)
12302 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12304 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12307 if (dwarf_read_debug
)
12308 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12312 dwo_file_up
dwo_file (new struct dwo_file
);
12313 dwo_file
->dwo_name
= dwo_name
;
12314 dwo_file
->comp_dir
= comp_dir
;
12315 dwo_file
->dbfd
= std::move (dbfd
);
12317 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12318 &dwo_file
->sections
);
12320 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12321 dwo_file
->sections
.info
, dwo_file
->cus
);
12323 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12324 dwo_file
->sections
.types
, dwo_file
->tus
);
12326 if (dwarf_read_debug
)
12327 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12329 return dwo_file
.release ();
12332 /* This function is mapped across the sections and remembers the offset and
12333 size of each of the DWP debugging sections common to version 1 and 2 that
12334 we are interested in. */
12337 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12338 void *dwp_file_ptr
)
12340 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12341 const struct dwop_section_names
*names
= &dwop_section_names
;
12342 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12344 /* Record the ELF section number for later lookup: this is what the
12345 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12346 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12347 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12349 /* Look for specific sections that we need. */
12350 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12352 dwp_file
->sections
.str
.s
.section
= sectp
;
12353 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12355 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12357 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12358 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12360 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12362 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12363 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12367 /* This function is mapped across the sections and remembers the offset and
12368 size of each of the DWP version 2 debugging sections that we are interested
12369 in. This is split into a separate function because we don't know if we
12370 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12373 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12375 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12376 const struct dwop_section_names
*names
= &dwop_section_names
;
12377 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12379 /* Record the ELF section number for later lookup: this is what the
12380 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12381 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12382 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12384 /* Look for specific sections that we need. */
12385 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12387 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12388 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12390 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12392 dwp_file
->sections
.info
.s
.section
= sectp
;
12393 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12395 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12397 dwp_file
->sections
.line
.s
.section
= sectp
;
12398 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12400 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12402 dwp_file
->sections
.loc
.s
.section
= sectp
;
12403 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12405 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12407 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12408 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12410 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12412 dwp_file
->sections
.macro
.s
.section
= sectp
;
12413 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12415 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12417 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12418 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12420 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12422 dwp_file
->sections
.types
.s
.section
= sectp
;
12423 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12427 /* Hash function for dwp_file loaded CUs/TUs. */
12430 hash_dwp_loaded_cutus (const void *item
)
12432 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12434 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12435 return dwo_unit
->signature
;
12438 /* Equality function for dwp_file loaded CUs/TUs. */
12441 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12443 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12444 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12446 return dua
->signature
== dub
->signature
;
12449 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12452 allocate_dwp_loaded_cutus_table ()
12454 return htab_up (htab_create_alloc (3,
12455 hash_dwp_loaded_cutus
,
12456 eq_dwp_loaded_cutus
,
12457 NULL
, xcalloc
, xfree
));
12460 /* Try to open DWP file FILE_NAME.
12461 The result is the bfd handle of the file.
12462 If there is a problem finding or opening the file, return NULL.
12463 Upon success, the canonicalized path of the file is stored in the bfd,
12464 same as symfile_bfd_open. */
12466 static gdb_bfd_ref_ptr
12467 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12468 const char *file_name
)
12470 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12472 1 /*search_cwd*/));
12476 /* Work around upstream bug 15652.
12477 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12478 [Whether that's a "bug" is debatable, but it is getting in our way.]
12479 We have no real idea where the dwp file is, because gdb's realpath-ing
12480 of the executable's path may have discarded the needed info.
12481 [IWBN if the dwp file name was recorded in the executable, akin to
12482 .gnu_debuglink, but that doesn't exist yet.]
12483 Strip the directory from FILE_NAME and search again. */
12484 if (*debug_file_directory
!= '\0')
12486 /* Don't implicitly search the current directory here.
12487 If the user wants to search "." to handle this case,
12488 it must be added to debug-file-directory. */
12489 return try_open_dwop_file (dwarf2_per_objfile
,
12490 lbasename (file_name
), 1 /*is_dwp*/,
12497 /* Initialize the use of the DWP file for the current objfile.
12498 By convention the name of the DWP file is ${objfile}.dwp.
12499 The result is NULL if it can't be found. */
12501 static std::unique_ptr
<struct dwp_file
>
12502 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12504 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12506 /* Try to find first .dwp for the binary file before any symbolic links
12509 /* If the objfile is a debug file, find the name of the real binary
12510 file and get the name of dwp file from there. */
12511 std::string dwp_name
;
12512 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12514 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12515 const char *backlink_basename
= lbasename (backlink
->original_name
);
12517 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12520 dwp_name
= objfile
->original_name
;
12522 dwp_name
+= ".dwp";
12524 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12526 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12528 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12529 dwp_name
= objfile_name (objfile
);
12530 dwp_name
+= ".dwp";
12531 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12536 if (dwarf_read_debug
)
12537 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12538 return std::unique_ptr
<dwp_file
> ();
12541 const char *name
= bfd_get_filename (dbfd
.get ());
12542 std::unique_ptr
<struct dwp_file
> dwp_file
12543 (new struct dwp_file (name
, std::move (dbfd
)));
12545 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12546 dwp_file
->elf_sections
=
12547 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12548 dwp_file
->num_sections
, asection
*);
12550 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12551 dwarf2_locate_common_dwp_sections
,
12554 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12557 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12560 /* The DWP file version is stored in the hash table. Oh well. */
12561 if (dwp_file
->cus
&& dwp_file
->tus
12562 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12564 /* Technically speaking, we should try to limp along, but this is
12565 pretty bizarre. We use pulongest here because that's the established
12566 portability solution (e.g, we cannot use %u for uint32_t). */
12567 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12568 " TU version %s [in DWP file %s]"),
12569 pulongest (dwp_file
->cus
->version
),
12570 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12574 dwp_file
->version
= dwp_file
->cus
->version
;
12575 else if (dwp_file
->tus
)
12576 dwp_file
->version
= dwp_file
->tus
->version
;
12578 dwp_file
->version
= 2;
12580 if (dwp_file
->version
== 2)
12581 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12582 dwarf2_locate_v2_dwp_sections
,
12585 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12586 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12588 if (dwarf_read_debug
)
12590 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12591 fprintf_unfiltered (gdb_stdlog
,
12592 " %s CUs, %s TUs\n",
12593 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12594 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12600 /* Wrapper around open_and_init_dwp_file, only open it once. */
12602 static struct dwp_file
*
12603 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12605 if (! dwarf2_per_objfile
->dwp_checked
)
12607 dwarf2_per_objfile
->dwp_file
12608 = open_and_init_dwp_file (dwarf2_per_objfile
);
12609 dwarf2_per_objfile
->dwp_checked
= 1;
12611 return dwarf2_per_objfile
->dwp_file
.get ();
12614 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12615 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12616 or in the DWP file for the objfile, referenced by THIS_UNIT.
12617 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12618 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12620 This is called, for example, when wanting to read a variable with a
12621 complex location. Therefore we don't want to do file i/o for every call.
12622 Therefore we don't want to look for a DWO file on every call.
12623 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12624 then we check if we've already seen DWO_NAME, and only THEN do we check
12627 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12628 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12630 static struct dwo_unit
*
12631 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12632 const char *dwo_name
, const char *comp_dir
,
12633 ULONGEST signature
, int is_debug_types
)
12635 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12636 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12637 const char *kind
= is_debug_types
? "TU" : "CU";
12638 void **dwo_file_slot
;
12639 struct dwo_file
*dwo_file
;
12640 struct dwp_file
*dwp_file
;
12642 /* First see if there's a DWP file.
12643 If we have a DWP file but didn't find the DWO inside it, don't
12644 look for the original DWO file. It makes gdb behave differently
12645 depending on whether one is debugging in the build tree. */
12647 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12648 if (dwp_file
!= NULL
)
12650 const struct dwp_hash_table
*dwp_htab
=
12651 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12653 if (dwp_htab
!= NULL
)
12655 struct dwo_unit
*dwo_cutu
=
12656 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12657 signature
, is_debug_types
);
12659 if (dwo_cutu
!= NULL
)
12661 if (dwarf_read_debug
)
12663 fprintf_unfiltered (gdb_stdlog
,
12664 "Virtual DWO %s %s found: @%s\n",
12665 kind
, hex_string (signature
),
12666 host_address_to_string (dwo_cutu
));
12674 /* No DWP file, look for the DWO file. */
12676 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12677 dwo_name
, comp_dir
);
12678 if (*dwo_file_slot
== NULL
)
12680 /* Read in the file and build a table of the CUs/TUs it contains. */
12681 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12683 /* NOTE: This will be NULL if unable to open the file. */
12684 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12686 if (dwo_file
!= NULL
)
12688 struct dwo_unit
*dwo_cutu
= NULL
;
12690 if (is_debug_types
&& dwo_file
->tus
)
12692 struct dwo_unit find_dwo_cutu
;
12694 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12695 find_dwo_cutu
.signature
= signature
;
12697 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12700 else if (!is_debug_types
&& dwo_file
->cus
)
12702 struct dwo_unit find_dwo_cutu
;
12704 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12705 find_dwo_cutu
.signature
= signature
;
12706 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12710 if (dwo_cutu
!= NULL
)
12712 if (dwarf_read_debug
)
12714 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12715 kind
, dwo_name
, hex_string (signature
),
12716 host_address_to_string (dwo_cutu
));
12723 /* We didn't find it. This could mean a dwo_id mismatch, or
12724 someone deleted the DWO/DWP file, or the search path isn't set up
12725 correctly to find the file. */
12727 if (dwarf_read_debug
)
12729 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12730 kind
, dwo_name
, hex_string (signature
));
12733 /* This is a warning and not a complaint because it can be caused by
12734 pilot error (e.g., user accidentally deleting the DWO). */
12736 /* Print the name of the DWP file if we looked there, helps the user
12737 better diagnose the problem. */
12738 std::string dwp_text
;
12740 if (dwp_file
!= NULL
)
12741 dwp_text
= string_printf (" [in DWP file %s]",
12742 lbasename (dwp_file
->name
));
12744 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12745 " [in module %s]"),
12746 kind
, dwo_name
, hex_string (signature
),
12748 this_unit
->is_debug_types
? "TU" : "CU",
12749 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12754 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12755 See lookup_dwo_cutu_unit for details. */
12757 static struct dwo_unit
*
12758 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12759 const char *dwo_name
, const char *comp_dir
,
12760 ULONGEST signature
)
12762 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12765 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12766 See lookup_dwo_cutu_unit for details. */
12768 static struct dwo_unit
*
12769 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12770 const char *dwo_name
, const char *comp_dir
)
12772 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12775 /* Traversal function for queue_and_load_all_dwo_tus. */
12778 queue_and_load_dwo_tu (void **slot
, void *info
)
12780 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12781 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12782 ULONGEST signature
= dwo_unit
->signature
;
12783 struct signatured_type
*sig_type
=
12784 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12786 if (sig_type
!= NULL
)
12788 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12790 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12791 a real dependency of PER_CU on SIG_TYPE. That is detected later
12792 while processing PER_CU. */
12793 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12794 load_full_type_unit (sig_cu
);
12795 per_cu
->imported_symtabs_push (sig_cu
);
12801 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12802 The DWO may have the only definition of the type, though it may not be
12803 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12804 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12807 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12809 struct dwo_unit
*dwo_unit
;
12810 struct dwo_file
*dwo_file
;
12812 gdb_assert (!per_cu
->is_debug_types
);
12813 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12814 gdb_assert (per_cu
->cu
!= NULL
);
12816 dwo_unit
= per_cu
->cu
->dwo_unit
;
12817 gdb_assert (dwo_unit
!= NULL
);
12819 dwo_file
= dwo_unit
->dwo_file
;
12820 if (dwo_file
->tus
!= NULL
)
12821 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12825 /* Read in various DIEs. */
12827 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12828 Inherit only the children of the DW_AT_abstract_origin DIE not being
12829 already referenced by DW_AT_abstract_origin from the children of the
12833 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12835 struct die_info
*child_die
;
12836 sect_offset
*offsetp
;
12837 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12838 struct die_info
*origin_die
;
12839 /* Iterator of the ORIGIN_DIE children. */
12840 struct die_info
*origin_child_die
;
12841 struct attribute
*attr
;
12842 struct dwarf2_cu
*origin_cu
;
12843 struct pending
**origin_previous_list_in_scope
;
12845 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12849 /* Note that following die references may follow to a die in a
12853 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12855 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12857 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12858 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12860 if (die
->tag
!= origin_die
->tag
12861 && !(die
->tag
== DW_TAG_inlined_subroutine
12862 && origin_die
->tag
== DW_TAG_subprogram
))
12863 complaint (_("DIE %s and its abstract origin %s have different tags"),
12864 sect_offset_str (die
->sect_off
),
12865 sect_offset_str (origin_die
->sect_off
));
12867 std::vector
<sect_offset
> offsets
;
12869 for (child_die
= die
->child
;
12870 child_die
&& child_die
->tag
;
12871 child_die
= child_die
->sibling
)
12873 struct die_info
*child_origin_die
;
12874 struct dwarf2_cu
*child_origin_cu
;
12876 /* We are trying to process concrete instance entries:
12877 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12878 it's not relevant to our analysis here. i.e. detecting DIEs that are
12879 present in the abstract instance but not referenced in the concrete
12881 if (child_die
->tag
== DW_TAG_call_site
12882 || child_die
->tag
== DW_TAG_GNU_call_site
)
12885 /* For each CHILD_DIE, find the corresponding child of
12886 ORIGIN_DIE. If there is more than one layer of
12887 DW_AT_abstract_origin, follow them all; there shouldn't be,
12888 but GCC versions at least through 4.4 generate this (GCC PR
12890 child_origin_die
= child_die
;
12891 child_origin_cu
= cu
;
12894 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12898 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12902 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12903 counterpart may exist. */
12904 if (child_origin_die
!= child_die
)
12906 if (child_die
->tag
!= child_origin_die
->tag
12907 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12908 && child_origin_die
->tag
== DW_TAG_subprogram
))
12909 complaint (_("Child DIE %s and its abstract origin %s have "
12911 sect_offset_str (child_die
->sect_off
),
12912 sect_offset_str (child_origin_die
->sect_off
));
12913 if (child_origin_die
->parent
!= origin_die
)
12914 complaint (_("Child DIE %s and its abstract origin %s have "
12915 "different parents"),
12916 sect_offset_str (child_die
->sect_off
),
12917 sect_offset_str (child_origin_die
->sect_off
));
12919 offsets
.push_back (child_origin_die
->sect_off
);
12922 std::sort (offsets
.begin (), offsets
.end ());
12923 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12924 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12925 if (offsetp
[-1] == *offsetp
)
12926 complaint (_("Multiple children of DIE %s refer "
12927 "to DIE %s as their abstract origin"),
12928 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12930 offsetp
= offsets
.data ();
12931 origin_child_die
= origin_die
->child
;
12932 while (origin_child_die
&& origin_child_die
->tag
)
12934 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12935 while (offsetp
< offsets_end
12936 && *offsetp
< origin_child_die
->sect_off
)
12938 if (offsetp
>= offsets_end
12939 || *offsetp
> origin_child_die
->sect_off
)
12941 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12942 Check whether we're already processing ORIGIN_CHILD_DIE.
12943 This can happen with mutually referenced abstract_origins.
12945 if (!origin_child_die
->in_process
)
12946 process_die (origin_child_die
, origin_cu
);
12948 origin_child_die
= origin_child_die
->sibling
;
12950 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12952 if (cu
!= origin_cu
)
12953 compute_delayed_physnames (origin_cu
);
12957 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12959 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12960 struct gdbarch
*gdbarch
= objfile
->arch ();
12961 struct context_stack
*newobj
;
12964 struct die_info
*child_die
;
12965 struct attribute
*attr
, *call_line
, *call_file
;
12967 CORE_ADDR baseaddr
;
12968 struct block
*block
;
12969 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12970 std::vector
<struct symbol
*> template_args
;
12971 struct template_symbol
*templ_func
= NULL
;
12975 /* If we do not have call site information, we can't show the
12976 caller of this inlined function. That's too confusing, so
12977 only use the scope for local variables. */
12978 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12979 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12980 if (call_line
== NULL
|| call_file
== NULL
)
12982 read_lexical_block_scope (die
, cu
);
12987 baseaddr
= objfile
->text_section_offset ();
12989 name
= dwarf2_name (die
, cu
);
12991 /* Ignore functions with missing or empty names. These are actually
12992 illegal according to the DWARF standard. */
12995 complaint (_("missing name for subprogram DIE at %s"),
12996 sect_offset_str (die
->sect_off
));
13000 /* Ignore functions with missing or invalid low and high pc attributes. */
13001 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13002 <= PC_BOUNDS_INVALID
)
13004 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13005 if (!attr
|| !DW_UNSND (attr
))
13006 complaint (_("cannot get low and high bounds "
13007 "for subprogram DIE at %s"),
13008 sect_offset_str (die
->sect_off
));
13012 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13013 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13015 /* If we have any template arguments, then we must allocate a
13016 different sort of symbol. */
13017 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13019 if (child_die
->tag
== DW_TAG_template_type_param
13020 || child_die
->tag
== DW_TAG_template_value_param
)
13022 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13023 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13028 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13029 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13030 (struct symbol
*) templ_func
);
13032 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13033 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13036 /* If there is a location expression for DW_AT_frame_base, record
13038 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13039 if (attr
!= nullptr)
13040 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13042 /* If there is a location for the static link, record it. */
13043 newobj
->static_link
= NULL
;
13044 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13045 if (attr
!= nullptr)
13047 newobj
->static_link
13048 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13049 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13050 cu
->per_cu
->addr_type ());
13053 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13055 if (die
->child
!= NULL
)
13057 child_die
= die
->child
;
13058 while (child_die
&& child_die
->tag
)
13060 if (child_die
->tag
== DW_TAG_template_type_param
13061 || child_die
->tag
== DW_TAG_template_value_param
)
13063 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13066 template_args
.push_back (arg
);
13069 process_die (child_die
, cu
);
13070 child_die
= child_die
->sibling
;
13074 inherit_abstract_dies (die
, cu
);
13076 /* If we have a DW_AT_specification, we might need to import using
13077 directives from the context of the specification DIE. See the
13078 comment in determine_prefix. */
13079 if (cu
->language
== language_cplus
13080 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13082 struct dwarf2_cu
*spec_cu
= cu
;
13083 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13087 child_die
= spec_die
->child
;
13088 while (child_die
&& child_die
->tag
)
13090 if (child_die
->tag
== DW_TAG_imported_module
)
13091 process_die (child_die
, spec_cu
);
13092 child_die
= child_die
->sibling
;
13095 /* In some cases, GCC generates specification DIEs that
13096 themselves contain DW_AT_specification attributes. */
13097 spec_die
= die_specification (spec_die
, &spec_cu
);
13101 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13102 /* Make a block for the local symbols within. */
13103 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13104 cstk
.static_link
, lowpc
, highpc
);
13106 /* For C++, set the block's scope. */
13107 if ((cu
->language
== language_cplus
13108 || cu
->language
== language_fortran
13109 || cu
->language
== language_d
13110 || cu
->language
== language_rust
)
13111 && cu
->processing_has_namespace_info
)
13112 block_set_scope (block
, determine_prefix (die
, cu
),
13113 &objfile
->objfile_obstack
);
13115 /* If we have address ranges, record them. */
13116 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13118 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13120 /* Attach template arguments to function. */
13121 if (!template_args
.empty ())
13123 gdb_assert (templ_func
!= NULL
);
13125 templ_func
->n_template_arguments
= template_args
.size ();
13126 templ_func
->template_arguments
13127 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13128 templ_func
->n_template_arguments
);
13129 memcpy (templ_func
->template_arguments
,
13130 template_args
.data (),
13131 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13133 /* Make sure that the symtab is set on the new symbols. Even
13134 though they don't appear in this symtab directly, other parts
13135 of gdb assume that symbols do, and this is reasonably
13137 for (symbol
*sym
: template_args
)
13138 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13141 /* In C++, we can have functions nested inside functions (e.g., when
13142 a function declares a class that has methods). This means that
13143 when we finish processing a function scope, we may need to go
13144 back to building a containing block's symbol lists. */
13145 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13146 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13148 /* If we've finished processing a top-level function, subsequent
13149 symbols go in the file symbol list. */
13150 if (cu
->get_builder ()->outermost_context_p ())
13151 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13154 /* Process all the DIES contained within a lexical block scope. Start
13155 a new scope, process the dies, and then close the scope. */
13158 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13160 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13161 struct gdbarch
*gdbarch
= objfile
->arch ();
13162 CORE_ADDR lowpc
, highpc
;
13163 struct die_info
*child_die
;
13164 CORE_ADDR baseaddr
;
13166 baseaddr
= objfile
->text_section_offset ();
13168 /* Ignore blocks with missing or invalid low and high pc attributes. */
13169 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13170 as multiple lexical blocks? Handling children in a sane way would
13171 be nasty. Might be easier to properly extend generic blocks to
13172 describe ranges. */
13173 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13175 case PC_BOUNDS_NOT_PRESENT
:
13176 /* DW_TAG_lexical_block has no attributes, process its children as if
13177 there was no wrapping by that DW_TAG_lexical_block.
13178 GCC does no longer produces such DWARF since GCC r224161. */
13179 for (child_die
= die
->child
;
13180 child_die
!= NULL
&& child_die
->tag
;
13181 child_die
= child_die
->sibling
)
13183 /* We might already be processing this DIE. This can happen
13184 in an unusual circumstance -- where a subroutine A
13185 appears lexically in another subroutine B, but A actually
13186 inlines B. The recursion is broken here, rather than in
13187 inherit_abstract_dies, because it seems better to simply
13188 drop concrete children here. */
13189 if (!child_die
->in_process
)
13190 process_die (child_die
, cu
);
13193 case PC_BOUNDS_INVALID
:
13196 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13197 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13199 cu
->get_builder ()->push_context (0, lowpc
);
13200 if (die
->child
!= NULL
)
13202 child_die
= die
->child
;
13203 while (child_die
&& child_die
->tag
)
13205 process_die (child_die
, cu
);
13206 child_die
= child_die
->sibling
;
13209 inherit_abstract_dies (die
, cu
);
13210 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13212 if (*cu
->get_builder ()->get_local_symbols () != NULL
13213 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13215 struct block
*block
13216 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13217 cstk
.start_addr
, highpc
);
13219 /* Note that recording ranges after traversing children, as we
13220 do here, means that recording a parent's ranges entails
13221 walking across all its children's ranges as they appear in
13222 the address map, which is quadratic behavior.
13224 It would be nicer to record the parent's ranges before
13225 traversing its children, simply overriding whatever you find
13226 there. But since we don't even decide whether to create a
13227 block until after we've traversed its children, that's hard
13229 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13231 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13232 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13235 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13238 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13240 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13241 struct gdbarch
*gdbarch
= objfile
->arch ();
13242 CORE_ADDR pc
, baseaddr
;
13243 struct attribute
*attr
;
13244 struct call_site
*call_site
, call_site_local
;
13247 struct die_info
*child_die
;
13249 baseaddr
= objfile
->text_section_offset ();
13251 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13254 /* This was a pre-DWARF-5 GNU extension alias
13255 for DW_AT_call_return_pc. */
13256 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13260 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13261 "DIE %s [in module %s]"),
13262 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13265 pc
= attr
->value_as_address () + baseaddr
;
13266 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13268 if (cu
->call_site_htab
== NULL
)
13269 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13270 NULL
, &objfile
->objfile_obstack
,
13271 hashtab_obstack_allocate
, NULL
);
13272 call_site_local
.pc
= pc
;
13273 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13276 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13277 "DIE %s [in module %s]"),
13278 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13279 objfile_name (objfile
));
13283 /* Count parameters at the caller. */
13286 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13287 child_die
= child_die
->sibling
)
13289 if (child_die
->tag
!= DW_TAG_call_site_parameter
13290 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13292 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13293 "DW_TAG_call_site child DIE %s [in module %s]"),
13294 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13295 objfile_name (objfile
));
13303 = ((struct call_site
*)
13304 obstack_alloc (&objfile
->objfile_obstack
,
13305 sizeof (*call_site
)
13306 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13308 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13309 call_site
->pc
= pc
;
13311 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13312 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13314 struct die_info
*func_die
;
13316 /* Skip also over DW_TAG_inlined_subroutine. */
13317 for (func_die
= die
->parent
;
13318 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13319 && func_die
->tag
!= DW_TAG_subroutine_type
;
13320 func_die
= func_die
->parent
);
13322 /* DW_AT_call_all_calls is a superset
13323 of DW_AT_call_all_tail_calls. */
13325 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13326 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13327 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13328 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13330 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13331 not complete. But keep CALL_SITE for look ups via call_site_htab,
13332 both the initial caller containing the real return address PC and
13333 the final callee containing the current PC of a chain of tail
13334 calls do not need to have the tail call list complete. But any
13335 function candidate for a virtual tail call frame searched via
13336 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13337 determined unambiguously. */
13341 struct type
*func_type
= NULL
;
13344 func_type
= get_die_type (func_die
, cu
);
13345 if (func_type
!= NULL
)
13347 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13349 /* Enlist this call site to the function. */
13350 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13351 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13354 complaint (_("Cannot find function owning DW_TAG_call_site "
13355 "DIE %s [in module %s]"),
13356 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13360 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13362 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13364 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13367 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13368 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13370 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13371 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13372 /* Keep NULL DWARF_BLOCK. */;
13373 else if (attr
->form_is_block ())
13375 struct dwarf2_locexpr_baton
*dlbaton
;
13377 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13378 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13379 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13380 dlbaton
->per_cu
= cu
->per_cu
;
13382 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13384 else if (attr
->form_is_ref ())
13386 struct dwarf2_cu
*target_cu
= cu
;
13387 struct die_info
*target_die
;
13389 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13390 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13391 if (die_is_declaration (target_die
, target_cu
))
13393 const char *target_physname
;
13395 /* Prefer the mangled name; otherwise compute the demangled one. */
13396 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13397 if (target_physname
== NULL
)
13398 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13399 if (target_physname
== NULL
)
13400 complaint (_("DW_AT_call_target target DIE has invalid "
13401 "physname, for referencing DIE %s [in module %s]"),
13402 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13404 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13410 /* DW_AT_entry_pc should be preferred. */
13411 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13412 <= PC_BOUNDS_INVALID
)
13413 complaint (_("DW_AT_call_target target DIE has invalid "
13414 "low pc, for referencing DIE %s [in module %s]"),
13415 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13418 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13419 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13424 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13425 "block nor reference, for DIE %s [in module %s]"),
13426 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13428 call_site
->per_cu
= cu
->per_cu
;
13430 for (child_die
= die
->child
;
13431 child_die
&& child_die
->tag
;
13432 child_die
= child_die
->sibling
)
13434 struct call_site_parameter
*parameter
;
13435 struct attribute
*loc
, *origin
;
13437 if (child_die
->tag
!= DW_TAG_call_site_parameter
13438 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13440 /* Already printed the complaint above. */
13444 gdb_assert (call_site
->parameter_count
< nparams
);
13445 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13447 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13448 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13449 register is contained in DW_AT_call_value. */
13451 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13452 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13453 if (origin
== NULL
)
13455 /* This was a pre-DWARF-5 GNU extension alias
13456 for DW_AT_call_parameter. */
13457 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13459 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13461 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13463 sect_offset sect_off
= origin
->get_ref_die_offset ();
13464 if (!cu
->header
.offset_in_cu_p (sect_off
))
13466 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13467 binding can be done only inside one CU. Such referenced DIE
13468 therefore cannot be even moved to DW_TAG_partial_unit. */
13469 complaint (_("DW_AT_call_parameter offset is not in CU for "
13470 "DW_TAG_call_site child DIE %s [in module %s]"),
13471 sect_offset_str (child_die
->sect_off
),
13472 objfile_name (objfile
));
13475 parameter
->u
.param_cu_off
13476 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13478 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13480 complaint (_("No DW_FORM_block* DW_AT_location for "
13481 "DW_TAG_call_site child DIE %s [in module %s]"),
13482 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13487 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13488 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13489 if (parameter
->u
.dwarf_reg
!= -1)
13490 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13491 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13492 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13493 ¶meter
->u
.fb_offset
))
13494 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13497 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13498 "for DW_FORM_block* DW_AT_location is supported for "
13499 "DW_TAG_call_site child DIE %s "
13501 sect_offset_str (child_die
->sect_off
),
13502 objfile_name (objfile
));
13507 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13509 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13510 if (attr
== NULL
|| !attr
->form_is_block ())
13512 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13513 "DW_TAG_call_site child DIE %s [in module %s]"),
13514 sect_offset_str (child_die
->sect_off
),
13515 objfile_name (objfile
));
13518 parameter
->value
= DW_BLOCK (attr
)->data
;
13519 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13521 /* Parameters are not pre-cleared by memset above. */
13522 parameter
->data_value
= NULL
;
13523 parameter
->data_value_size
= 0;
13524 call_site
->parameter_count
++;
13526 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13528 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13529 if (attr
!= nullptr)
13531 if (!attr
->form_is_block ())
13532 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13533 "DW_TAG_call_site child DIE %s [in module %s]"),
13534 sect_offset_str (child_die
->sect_off
),
13535 objfile_name (objfile
));
13538 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13539 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13545 /* Helper function for read_variable. If DIE represents a virtual
13546 table, then return the type of the concrete object that is
13547 associated with the virtual table. Otherwise, return NULL. */
13549 static struct type
*
13550 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13552 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13556 /* Find the type DIE. */
13557 struct die_info
*type_die
= NULL
;
13558 struct dwarf2_cu
*type_cu
= cu
;
13560 if (attr
->form_is_ref ())
13561 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13562 if (type_die
== NULL
)
13565 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13567 return die_containing_type (type_die
, type_cu
);
13570 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13573 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13575 struct rust_vtable_symbol
*storage
= NULL
;
13577 if (cu
->language
== language_rust
)
13579 struct type
*containing_type
= rust_containing_type (die
, cu
);
13581 if (containing_type
!= NULL
)
13583 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13585 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
13586 storage
->concrete_type
= containing_type
;
13587 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13591 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13592 struct attribute
*abstract_origin
13593 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13594 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13595 if (res
== NULL
&& loc
&& abstract_origin
)
13597 /* We have a variable without a name, but with a location and an abstract
13598 origin. This may be a concrete instance of an abstract variable
13599 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13601 struct dwarf2_cu
*origin_cu
= cu
;
13602 struct die_info
*origin_die
13603 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13604 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13605 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13609 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13610 reading .debug_rnglists.
13611 Callback's type should be:
13612 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13613 Return true if the attributes are present and valid, otherwise,
13616 template <typename Callback
>
13618 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13619 Callback
&&callback
)
13621 struct dwarf2_per_objfile
*dwarf2_per_objfile
13622 = cu
->per_cu
->dwarf2_per_objfile
;
13623 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13624 bfd
*obfd
= objfile
->obfd
;
13625 /* Base address selection entry. */
13626 gdb::optional
<CORE_ADDR
> base
;
13627 const gdb_byte
*buffer
;
13628 CORE_ADDR baseaddr
;
13629 bool overflow
= false;
13631 base
= cu
->base_address
;
13633 dwarf2_per_objfile
->rnglists
.read (objfile
);
13634 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13636 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13640 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13642 baseaddr
= objfile
->text_section_offset ();
13646 /* Initialize it due to a false compiler warning. */
13647 CORE_ADDR range_beginning
= 0, range_end
= 0;
13648 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13649 + dwarf2_per_objfile
->rnglists
.size
);
13650 unsigned int bytes_read
;
13652 if (buffer
== buf_end
)
13657 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13660 case DW_RLE_end_of_list
:
13662 case DW_RLE_base_address
:
13663 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13668 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13669 buffer
+= bytes_read
;
13671 case DW_RLE_start_length
:
13672 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13677 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13679 buffer
+= bytes_read
;
13680 range_end
= (range_beginning
13681 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13682 buffer
+= bytes_read
;
13683 if (buffer
> buf_end
)
13689 case DW_RLE_offset_pair
:
13690 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13691 buffer
+= bytes_read
;
13692 if (buffer
> buf_end
)
13697 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13698 buffer
+= bytes_read
;
13699 if (buffer
> buf_end
)
13705 case DW_RLE_start_end
:
13706 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13711 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13713 buffer
+= bytes_read
;
13714 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13715 buffer
+= bytes_read
;
13718 complaint (_("Invalid .debug_rnglists data (no base address)"));
13721 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13723 if (rlet
== DW_RLE_base_address
)
13726 if (!base
.has_value ())
13728 /* We have no valid base address for the ranges
13730 complaint (_("Invalid .debug_rnglists data (no base address)"));
13734 if (range_beginning
> range_end
)
13736 /* Inverted range entries are invalid. */
13737 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13741 /* Empty range entries have no effect. */
13742 if (range_beginning
== range_end
)
13745 range_beginning
+= *base
;
13746 range_end
+= *base
;
13748 /* A not-uncommon case of bad debug info.
13749 Don't pollute the addrmap with bad data. */
13750 if (range_beginning
+ baseaddr
== 0
13751 && !dwarf2_per_objfile
->has_section_at_zero
)
13753 complaint (_(".debug_rnglists entry has start address of zero"
13754 " [in module %s]"), objfile_name (objfile
));
13758 callback (range_beginning
, range_end
);
13763 complaint (_("Offset %d is not terminated "
13764 "for DW_AT_ranges attribute"),
13772 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13773 Callback's type should be:
13774 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13775 Return 1 if the attributes are present and valid, otherwise, return 0. */
13777 template <typename Callback
>
13779 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13780 Callback
&&callback
)
13782 struct dwarf2_per_objfile
*dwarf2_per_objfile
13783 = cu
->per_cu
->dwarf2_per_objfile
;
13784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13785 struct comp_unit_head
*cu_header
= &cu
->header
;
13786 bfd
*obfd
= objfile
->obfd
;
13787 unsigned int addr_size
= cu_header
->addr_size
;
13788 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13789 /* Base address selection entry. */
13790 gdb::optional
<CORE_ADDR
> base
;
13791 unsigned int dummy
;
13792 const gdb_byte
*buffer
;
13793 CORE_ADDR baseaddr
;
13795 if (cu_header
->version
>= 5)
13796 return dwarf2_rnglists_process (offset
, cu
, callback
);
13798 base
= cu
->base_address
;
13800 dwarf2_per_objfile
->ranges
.read (objfile
);
13801 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13803 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13807 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13809 baseaddr
= objfile
->text_section_offset ();
13813 CORE_ADDR range_beginning
, range_end
;
13815 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13816 buffer
+= addr_size
;
13817 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13818 buffer
+= addr_size
;
13819 offset
+= 2 * addr_size
;
13821 /* An end of list marker is a pair of zero addresses. */
13822 if (range_beginning
== 0 && range_end
== 0)
13823 /* Found the end of list entry. */
13826 /* Each base address selection entry is a pair of 2 values.
13827 The first is the largest possible address, the second is
13828 the base address. Check for a base address here. */
13829 if ((range_beginning
& mask
) == mask
)
13831 /* If we found the largest possible address, then we already
13832 have the base address in range_end. */
13837 if (!base
.has_value ())
13839 /* We have no valid base address for the ranges
13841 complaint (_("Invalid .debug_ranges data (no base address)"));
13845 if (range_beginning
> range_end
)
13847 /* Inverted range entries are invalid. */
13848 complaint (_("Invalid .debug_ranges data (inverted range)"));
13852 /* Empty range entries have no effect. */
13853 if (range_beginning
== range_end
)
13856 range_beginning
+= *base
;
13857 range_end
+= *base
;
13859 /* A not-uncommon case of bad debug info.
13860 Don't pollute the addrmap with bad data. */
13861 if (range_beginning
+ baseaddr
== 0
13862 && !dwarf2_per_objfile
->has_section_at_zero
)
13864 complaint (_(".debug_ranges entry has start address of zero"
13865 " [in module %s]"), objfile_name (objfile
));
13869 callback (range_beginning
, range_end
);
13875 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13876 Return 1 if the attributes are present and valid, otherwise, return 0.
13877 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13880 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13881 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13882 dwarf2_psymtab
*ranges_pst
)
13884 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13885 struct gdbarch
*gdbarch
= objfile
->arch ();
13886 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13889 CORE_ADDR high
= 0;
13892 retval
= dwarf2_ranges_process (offset
, cu
,
13893 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13895 if (ranges_pst
!= NULL
)
13900 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13901 range_beginning
+ baseaddr
)
13903 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13904 range_end
+ baseaddr
)
13906 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13907 lowpc
, highpc
- 1, ranges_pst
);
13910 /* FIXME: This is recording everything as a low-high
13911 segment of consecutive addresses. We should have a
13912 data structure for discontiguous block ranges
13916 low
= range_beginning
;
13922 if (range_beginning
< low
)
13923 low
= range_beginning
;
13924 if (range_end
> high
)
13932 /* If the first entry is an end-of-list marker, the range
13933 describes an empty scope, i.e. no instructions. */
13939 *high_return
= high
;
13943 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13944 definition for the return value. *LOWPC and *HIGHPC are set iff
13945 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13947 static enum pc_bounds_kind
13948 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13949 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13950 dwarf2_psymtab
*pst
)
13952 struct dwarf2_per_objfile
*dwarf2_per_objfile
13953 = cu
->per_cu
->dwarf2_per_objfile
;
13954 struct attribute
*attr
;
13955 struct attribute
*attr_high
;
13957 CORE_ADDR high
= 0;
13958 enum pc_bounds_kind ret
;
13960 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13963 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13964 if (attr
!= nullptr)
13966 low
= attr
->value_as_address ();
13967 high
= attr_high
->value_as_address ();
13968 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13972 /* Found high w/o low attribute. */
13973 return PC_BOUNDS_INVALID
;
13975 /* Found consecutive range of addresses. */
13976 ret
= PC_BOUNDS_HIGH_LOW
;
13980 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13983 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13984 We take advantage of the fact that DW_AT_ranges does not appear
13985 in DW_TAG_compile_unit of DWO files. */
13986 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13987 unsigned int ranges_offset
= (DW_UNSND (attr
)
13988 + (need_ranges_base
13992 /* Value of the DW_AT_ranges attribute is the offset in the
13993 .debug_ranges section. */
13994 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13995 return PC_BOUNDS_INVALID
;
13996 /* Found discontinuous range of addresses. */
13997 ret
= PC_BOUNDS_RANGES
;
14000 return PC_BOUNDS_NOT_PRESENT
;
14003 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14005 return PC_BOUNDS_INVALID
;
14007 /* When using the GNU linker, .gnu.linkonce. sections are used to
14008 eliminate duplicate copies of functions and vtables and such.
14009 The linker will arbitrarily choose one and discard the others.
14010 The AT_*_pc values for such functions refer to local labels in
14011 these sections. If the section from that file was discarded, the
14012 labels are not in the output, so the relocs get a value of 0.
14013 If this is a discarded function, mark the pc bounds as invalid,
14014 so that GDB will ignore it. */
14015 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14016 return PC_BOUNDS_INVALID
;
14024 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14025 its low and high PC addresses. Do nothing if these addresses could not
14026 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14027 and HIGHPC to the high address if greater than HIGHPC. */
14030 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14031 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14032 struct dwarf2_cu
*cu
)
14034 CORE_ADDR low
, high
;
14035 struct die_info
*child
= die
->child
;
14037 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14039 *lowpc
= std::min (*lowpc
, low
);
14040 *highpc
= std::max (*highpc
, high
);
14043 /* If the language does not allow nested subprograms (either inside
14044 subprograms or lexical blocks), we're done. */
14045 if (cu
->language
!= language_ada
)
14048 /* Check all the children of the given DIE. If it contains nested
14049 subprograms, then check their pc bounds. Likewise, we need to
14050 check lexical blocks as well, as they may also contain subprogram
14052 while (child
&& child
->tag
)
14054 if (child
->tag
== DW_TAG_subprogram
14055 || child
->tag
== DW_TAG_lexical_block
)
14056 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14057 child
= child
->sibling
;
14061 /* Get the low and high pc's represented by the scope DIE, and store
14062 them in *LOWPC and *HIGHPC. If the correct values can't be
14063 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14066 get_scope_pc_bounds (struct die_info
*die
,
14067 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14068 struct dwarf2_cu
*cu
)
14070 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14071 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14072 CORE_ADDR current_low
, current_high
;
14074 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14075 >= PC_BOUNDS_RANGES
)
14077 best_low
= current_low
;
14078 best_high
= current_high
;
14082 struct die_info
*child
= die
->child
;
14084 while (child
&& child
->tag
)
14086 switch (child
->tag
) {
14087 case DW_TAG_subprogram
:
14088 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14090 case DW_TAG_namespace
:
14091 case DW_TAG_module
:
14092 /* FIXME: carlton/2004-01-16: Should we do this for
14093 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14094 that current GCC's always emit the DIEs corresponding
14095 to definitions of methods of classes as children of a
14096 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14097 the DIEs giving the declarations, which could be
14098 anywhere). But I don't see any reason why the
14099 standards says that they have to be there. */
14100 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14102 if (current_low
!= ((CORE_ADDR
) -1))
14104 best_low
= std::min (best_low
, current_low
);
14105 best_high
= std::max (best_high
, current_high
);
14113 child
= child
->sibling
;
14118 *highpc
= best_high
;
14121 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14125 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14126 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14128 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14129 struct gdbarch
*gdbarch
= objfile
->arch ();
14130 struct attribute
*attr
;
14131 struct attribute
*attr_high
;
14133 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14136 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14137 if (attr
!= nullptr)
14139 CORE_ADDR low
= attr
->value_as_address ();
14140 CORE_ADDR high
= attr_high
->value_as_address ();
14142 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14145 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14146 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14147 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14151 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14152 if (attr
!= nullptr)
14154 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14155 We take advantage of the fact that DW_AT_ranges does not appear
14156 in DW_TAG_compile_unit of DWO files. */
14157 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14159 /* The value of the DW_AT_ranges attribute is the offset of the
14160 address range list in the .debug_ranges section. */
14161 unsigned long offset
= (DW_UNSND (attr
)
14162 + (need_ranges_base
? cu
->ranges_base
: 0));
14164 std::vector
<blockrange
> blockvec
;
14165 dwarf2_ranges_process (offset
, cu
,
14166 [&] (CORE_ADDR start
, CORE_ADDR end
)
14170 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14171 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14172 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14173 blockvec
.emplace_back (start
, end
);
14176 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14180 /* Check whether the producer field indicates either of GCC < 4.6, or the
14181 Intel C/C++ compiler, and cache the result in CU. */
14184 check_producer (struct dwarf2_cu
*cu
)
14188 if (cu
->producer
== NULL
)
14190 /* For unknown compilers expect their behavior is DWARF version
14193 GCC started to support .debug_types sections by -gdwarf-4 since
14194 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14195 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14196 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14197 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14199 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14201 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14202 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14204 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14206 cu
->producer_is_icc
= true;
14207 cu
->producer_is_icc_lt_14
= major
< 14;
14209 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14210 cu
->producer_is_codewarrior
= true;
14213 /* For other non-GCC compilers, expect their behavior is DWARF version
14217 cu
->checked_producer
= true;
14220 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14221 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14222 during 4.6.0 experimental. */
14225 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14227 if (!cu
->checked_producer
)
14228 check_producer (cu
);
14230 return cu
->producer_is_gxx_lt_4_6
;
14234 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14235 with incorrect is_stmt attributes. */
14238 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14240 if (!cu
->checked_producer
)
14241 check_producer (cu
);
14243 return cu
->producer_is_codewarrior
;
14246 /* Return the default accessibility type if it is not overridden by
14247 DW_AT_accessibility. */
14249 static enum dwarf_access_attribute
14250 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14252 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14254 /* The default DWARF 2 accessibility for members is public, the default
14255 accessibility for inheritance is private. */
14257 if (die
->tag
!= DW_TAG_inheritance
)
14258 return DW_ACCESS_public
;
14260 return DW_ACCESS_private
;
14264 /* DWARF 3+ defines the default accessibility a different way. The same
14265 rules apply now for DW_TAG_inheritance as for the members and it only
14266 depends on the container kind. */
14268 if (die
->parent
->tag
== DW_TAG_class_type
)
14269 return DW_ACCESS_private
;
14271 return DW_ACCESS_public
;
14275 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14276 offset. If the attribute was not found return 0, otherwise return
14277 1. If it was found but could not properly be handled, set *OFFSET
14281 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14284 struct attribute
*attr
;
14286 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14291 /* Note that we do not check for a section offset first here.
14292 This is because DW_AT_data_member_location is new in DWARF 4,
14293 so if we see it, we can assume that a constant form is really
14294 a constant and not a section offset. */
14295 if (attr
->form_is_constant ())
14296 *offset
= attr
->constant_value (0);
14297 else if (attr
->form_is_section_offset ())
14298 dwarf2_complex_location_expr_complaint ();
14299 else if (attr
->form_is_block ())
14300 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14302 dwarf2_complex_location_expr_complaint ();
14310 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14313 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14314 struct field
*field
)
14316 struct attribute
*attr
;
14318 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14321 if (attr
->form_is_constant ())
14323 LONGEST offset
= attr
->constant_value (0);
14324 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14326 else if (attr
->form_is_section_offset ())
14327 dwarf2_complex_location_expr_complaint ();
14328 else if (attr
->form_is_block ())
14331 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14333 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14336 struct objfile
*objfile
14337 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14338 struct dwarf2_locexpr_baton
*dlbaton
14339 = XOBNEW (&objfile
->objfile_obstack
,
14340 struct dwarf2_locexpr_baton
);
14341 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14342 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14343 /* When using this baton, we want to compute the address
14344 of the field, not the value. This is why
14345 is_reference is set to false here. */
14346 dlbaton
->is_reference
= false;
14347 dlbaton
->per_cu
= cu
->per_cu
;
14349 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14353 dwarf2_complex_location_expr_complaint ();
14357 /* Add an aggregate field to the field list. */
14360 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14361 struct dwarf2_cu
*cu
)
14363 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14364 struct gdbarch
*gdbarch
= objfile
->arch ();
14365 struct nextfield
*new_field
;
14366 struct attribute
*attr
;
14368 const char *fieldname
= "";
14370 if (die
->tag
== DW_TAG_inheritance
)
14372 fip
->baseclasses
.emplace_back ();
14373 new_field
= &fip
->baseclasses
.back ();
14377 fip
->fields
.emplace_back ();
14378 new_field
= &fip
->fields
.back ();
14381 new_field
->offset
= die
->sect_off
;
14383 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14384 if (attr
!= nullptr)
14385 new_field
->accessibility
= DW_UNSND (attr
);
14387 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14388 if (new_field
->accessibility
!= DW_ACCESS_public
)
14389 fip
->non_public_fields
= 1;
14391 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14392 if (attr
!= nullptr)
14393 new_field
->virtuality
= DW_UNSND (attr
);
14395 new_field
->virtuality
= DW_VIRTUALITY_none
;
14397 fp
= &new_field
->field
;
14399 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14401 /* Data member other than a C++ static data member. */
14403 /* Get type of field. */
14404 fp
->type
= die_type (die
, cu
);
14406 SET_FIELD_BITPOS (*fp
, 0);
14408 /* Get bit size of field (zero if none). */
14409 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14410 if (attr
!= nullptr)
14412 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14416 FIELD_BITSIZE (*fp
) = 0;
14419 /* Get bit offset of field. */
14420 handle_data_member_location (die
, cu
, fp
);
14421 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14422 if (attr
!= nullptr)
14424 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14426 /* For big endian bits, the DW_AT_bit_offset gives the
14427 additional bit offset from the MSB of the containing
14428 anonymous object to the MSB of the field. We don't
14429 have to do anything special since we don't need to
14430 know the size of the anonymous object. */
14431 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14435 /* For little endian bits, compute the bit offset to the
14436 MSB of the anonymous object, subtract off the number of
14437 bits from the MSB of the field to the MSB of the
14438 object, and then subtract off the number of bits of
14439 the field itself. The result is the bit offset of
14440 the LSB of the field. */
14441 int anonymous_size
;
14442 int bit_offset
= DW_UNSND (attr
);
14444 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14445 if (attr
!= nullptr)
14447 /* The size of the anonymous object containing
14448 the bit field is explicit, so use the
14449 indicated size (in bytes). */
14450 anonymous_size
= DW_UNSND (attr
);
14454 /* The size of the anonymous object containing
14455 the bit field must be inferred from the type
14456 attribute of the data member containing the
14458 anonymous_size
= TYPE_LENGTH (fp
->type
);
14460 SET_FIELD_BITPOS (*fp
,
14461 (FIELD_BITPOS (*fp
)
14462 + anonymous_size
* bits_per_byte
14463 - bit_offset
- FIELD_BITSIZE (*fp
)));
14466 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14468 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14469 + attr
->constant_value (0)));
14471 /* Get name of field. */
14472 fieldname
= dwarf2_name (die
, cu
);
14473 if (fieldname
== NULL
)
14476 /* The name is already allocated along with this objfile, so we don't
14477 need to duplicate it for the type. */
14478 fp
->name
= fieldname
;
14480 /* Change accessibility for artificial fields (e.g. virtual table
14481 pointer or virtual base class pointer) to private. */
14482 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14484 FIELD_ARTIFICIAL (*fp
) = 1;
14485 new_field
->accessibility
= DW_ACCESS_private
;
14486 fip
->non_public_fields
= 1;
14489 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14491 /* C++ static member. */
14493 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14494 is a declaration, but all versions of G++ as of this writing
14495 (so through at least 3.2.1) incorrectly generate
14496 DW_TAG_variable tags. */
14498 const char *physname
;
14500 /* Get name of field. */
14501 fieldname
= dwarf2_name (die
, cu
);
14502 if (fieldname
== NULL
)
14505 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14507 /* Only create a symbol if this is an external value.
14508 new_symbol checks this and puts the value in the global symbol
14509 table, which we want. If it is not external, new_symbol
14510 will try to put the value in cu->list_in_scope which is wrong. */
14511 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14513 /* A static const member, not much different than an enum as far as
14514 we're concerned, except that we can support more types. */
14515 new_symbol (die
, NULL
, cu
);
14518 /* Get physical name. */
14519 physname
= dwarf2_physname (fieldname
, die
, cu
);
14521 /* The name is already allocated along with this objfile, so we don't
14522 need to duplicate it for the type. */
14523 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14524 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14525 FIELD_NAME (*fp
) = fieldname
;
14527 else if (die
->tag
== DW_TAG_inheritance
)
14529 /* C++ base class field. */
14530 handle_data_member_location (die
, cu
, fp
);
14531 FIELD_BITSIZE (*fp
) = 0;
14532 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14533 FIELD_NAME (*fp
) = fp
->type
->name ();
14536 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14539 /* Can the type given by DIE define another type? */
14542 type_can_define_types (const struct die_info
*die
)
14546 case DW_TAG_typedef
:
14547 case DW_TAG_class_type
:
14548 case DW_TAG_structure_type
:
14549 case DW_TAG_union_type
:
14550 case DW_TAG_enumeration_type
:
14558 /* Add a type definition defined in the scope of the FIP's class. */
14561 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14562 struct dwarf2_cu
*cu
)
14564 struct decl_field fp
;
14565 memset (&fp
, 0, sizeof (fp
));
14567 gdb_assert (type_can_define_types (die
));
14569 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14570 fp
.name
= dwarf2_name (die
, cu
);
14571 fp
.type
= read_type_die (die
, cu
);
14573 /* Save accessibility. */
14574 enum dwarf_access_attribute accessibility
;
14575 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14577 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14579 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14580 switch (accessibility
)
14582 case DW_ACCESS_public
:
14583 /* The assumed value if neither private nor protected. */
14585 case DW_ACCESS_private
:
14588 case DW_ACCESS_protected
:
14589 fp
.is_protected
= 1;
14592 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14595 if (die
->tag
== DW_TAG_typedef
)
14596 fip
->typedef_field_list
.push_back (fp
);
14598 fip
->nested_types_list
.push_back (fp
);
14601 /* A convenience typedef that's used when finding the discriminant
14602 field for a variant part. */
14603 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14606 /* Compute the discriminant range for a given variant. OBSTACK is
14607 where the results will be stored. VARIANT is the variant to
14608 process. IS_UNSIGNED indicates whether the discriminant is signed
14611 static const gdb::array_view
<discriminant_range
>
14612 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14615 std::vector
<discriminant_range
> ranges
;
14617 if (variant
.default_branch
)
14620 if (variant
.discr_list_data
== nullptr)
14622 discriminant_range r
14623 = {variant
.discriminant_value
, variant
.discriminant_value
};
14624 ranges
.push_back (r
);
14628 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14629 variant
.discr_list_data
->size
);
14630 while (!data
.empty ())
14632 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14634 complaint (_("invalid discriminant marker: %d"), data
[0]);
14637 bool is_range
= data
[0] == DW_DSC_range
;
14638 data
= data
.slice (1);
14640 ULONGEST low
, high
;
14641 unsigned int bytes_read
;
14645 complaint (_("DW_AT_discr_list missing low value"));
14649 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14651 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14653 data
= data
.slice (bytes_read
);
14659 complaint (_("DW_AT_discr_list missing high value"));
14663 high
= read_unsigned_leb128 (nullptr, data
.data (),
14666 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14668 data
= data
.slice (bytes_read
);
14673 ranges
.push_back ({ low
, high
});
14677 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14679 std::copy (ranges
.begin (), ranges
.end (), result
);
14680 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14683 static const gdb::array_view
<variant_part
> create_variant_parts
14684 (struct obstack
*obstack
,
14685 const offset_map_type
&offset_map
,
14686 struct field_info
*fi
,
14687 const std::vector
<variant_part_builder
> &variant_parts
);
14689 /* Fill in a "struct variant" for a given variant field. RESULT is
14690 the variant to fill in. OBSTACK is where any needed allocations
14691 will be done. OFFSET_MAP holds the mapping from section offsets to
14692 fields for the type. FI describes the fields of the type we're
14693 processing. FIELD is the variant field we're converting. */
14696 create_one_variant (variant
&result
, struct obstack
*obstack
,
14697 const offset_map_type
&offset_map
,
14698 struct field_info
*fi
, const variant_field
&field
)
14700 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14701 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14702 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14703 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14704 field
.variant_parts
);
14707 /* Fill in a "struct variant_part" for a given variant part. RESULT
14708 is the variant part to fill in. OBSTACK is where any needed
14709 allocations will be done. OFFSET_MAP holds the mapping from
14710 section offsets to fields for the type. FI describes the fields of
14711 the type we're processing. BUILDER is the variant part to be
14715 create_one_variant_part (variant_part
&result
,
14716 struct obstack
*obstack
,
14717 const offset_map_type
&offset_map
,
14718 struct field_info
*fi
,
14719 const variant_part_builder
&builder
)
14721 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14722 if (iter
== offset_map
.end ())
14724 result
.discriminant_index
= -1;
14725 /* Doesn't matter. */
14726 result
.is_unsigned
= false;
14730 result
.discriminant_index
= iter
->second
;
14732 = TYPE_UNSIGNED (FIELD_TYPE
14733 (fi
->fields
[result
.discriminant_index
].field
));
14736 size_t n
= builder
.variants
.size ();
14737 variant
*output
= new (obstack
) variant
[n
];
14738 for (size_t i
= 0; i
< n
; ++i
)
14739 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14740 builder
.variants
[i
]);
14742 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14745 /* Create a vector of variant parts that can be attached to a type.
14746 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14747 holds the mapping from section offsets to fields for the type. FI
14748 describes the fields of the type we're processing. VARIANT_PARTS
14749 is the vector to convert. */
14751 static const gdb::array_view
<variant_part
>
14752 create_variant_parts (struct obstack
*obstack
,
14753 const offset_map_type
&offset_map
,
14754 struct field_info
*fi
,
14755 const std::vector
<variant_part_builder
> &variant_parts
)
14757 if (variant_parts
.empty ())
14760 size_t n
= variant_parts
.size ();
14761 variant_part
*result
= new (obstack
) variant_part
[n
];
14762 for (size_t i
= 0; i
< n
; ++i
)
14763 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14766 return gdb::array_view
<variant_part
> (result
, n
);
14769 /* Compute the variant part vector for FIP, attaching it to TYPE when
14773 add_variant_property (struct field_info
*fip
, struct type
*type
,
14774 struct dwarf2_cu
*cu
)
14776 /* Map section offsets of fields to their field index. Note the
14777 field index here does not take the number of baseclasses into
14779 offset_map_type offset_map
;
14780 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14781 offset_map
[fip
->fields
[i
].offset
] = i
;
14783 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14784 gdb::array_view
<variant_part
> parts
14785 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14786 fip
->variant_parts
);
14788 struct dynamic_prop prop
;
14789 prop
.kind
= PROP_VARIANT_PARTS
;
14790 prop
.data
.variant_parts
14791 = ((gdb::array_view
<variant_part
> *)
14792 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14794 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14797 /* Create the vector of fields, and attach it to the type. */
14800 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14801 struct dwarf2_cu
*cu
)
14803 int nfields
= fip
->nfields ();
14805 /* Record the field count, allocate space for the array of fields,
14806 and create blank accessibility bitfields if necessary. */
14807 type
->set_num_fields (nfields
);
14808 TYPE_FIELDS (type
) = (struct field
*)
14809 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14811 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14813 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14815 TYPE_FIELD_PRIVATE_BITS (type
) =
14816 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14817 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14819 TYPE_FIELD_PROTECTED_BITS (type
) =
14820 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14821 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14823 TYPE_FIELD_IGNORE_BITS (type
) =
14824 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14825 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14828 /* If the type has baseclasses, allocate and clear a bit vector for
14829 TYPE_FIELD_VIRTUAL_BITS. */
14830 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14832 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14833 unsigned char *pointer
;
14835 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14836 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14837 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14838 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14839 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14842 if (!fip
->variant_parts
.empty ())
14843 add_variant_property (fip
, type
, cu
);
14845 /* Copy the saved-up fields into the field vector. */
14846 for (int i
= 0; i
< nfields
; ++i
)
14848 struct nextfield
&field
14849 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14850 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14852 TYPE_FIELD (type
, i
) = field
.field
;
14853 switch (field
.accessibility
)
14855 case DW_ACCESS_private
:
14856 if (cu
->language
!= language_ada
)
14857 SET_TYPE_FIELD_PRIVATE (type
, i
);
14860 case DW_ACCESS_protected
:
14861 if (cu
->language
!= language_ada
)
14862 SET_TYPE_FIELD_PROTECTED (type
, i
);
14865 case DW_ACCESS_public
:
14869 /* Unknown accessibility. Complain and treat it as public. */
14871 complaint (_("unsupported accessibility %d"),
14872 field
.accessibility
);
14876 if (i
< fip
->baseclasses
.size ())
14878 switch (field
.virtuality
)
14880 case DW_VIRTUALITY_virtual
:
14881 case DW_VIRTUALITY_pure_virtual
:
14882 if (cu
->language
== language_ada
)
14883 error (_("unexpected virtuality in component of Ada type"));
14884 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14891 /* Return true if this member function is a constructor, false
14895 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14897 const char *fieldname
;
14898 const char *type_name
;
14901 if (die
->parent
== NULL
)
14904 if (die
->parent
->tag
!= DW_TAG_structure_type
14905 && die
->parent
->tag
!= DW_TAG_union_type
14906 && die
->parent
->tag
!= DW_TAG_class_type
)
14909 fieldname
= dwarf2_name (die
, cu
);
14910 type_name
= dwarf2_name (die
->parent
, cu
);
14911 if (fieldname
== NULL
|| type_name
== NULL
)
14914 len
= strlen (fieldname
);
14915 return (strncmp (fieldname
, type_name
, len
) == 0
14916 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14919 /* Check if the given VALUE is a recognized enum
14920 dwarf_defaulted_attribute constant according to DWARF5 spec,
14924 is_valid_DW_AT_defaulted (ULONGEST value
)
14928 case DW_DEFAULTED_no
:
14929 case DW_DEFAULTED_in_class
:
14930 case DW_DEFAULTED_out_of_class
:
14934 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14938 /* Add a member function to the proper fieldlist. */
14941 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14942 struct type
*type
, struct dwarf2_cu
*cu
)
14944 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14945 struct attribute
*attr
;
14947 struct fnfieldlist
*flp
= nullptr;
14948 struct fn_field
*fnp
;
14949 const char *fieldname
;
14950 struct type
*this_type
;
14951 enum dwarf_access_attribute accessibility
;
14953 if (cu
->language
== language_ada
)
14954 error (_("unexpected member function in Ada type"));
14956 /* Get name of member function. */
14957 fieldname
= dwarf2_name (die
, cu
);
14958 if (fieldname
== NULL
)
14961 /* Look up member function name in fieldlist. */
14962 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14964 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14966 flp
= &fip
->fnfieldlists
[i
];
14971 /* Create a new fnfieldlist if necessary. */
14972 if (flp
== nullptr)
14974 fip
->fnfieldlists
.emplace_back ();
14975 flp
= &fip
->fnfieldlists
.back ();
14976 flp
->name
= fieldname
;
14977 i
= fip
->fnfieldlists
.size () - 1;
14980 /* Create a new member function field and add it to the vector of
14982 flp
->fnfields
.emplace_back ();
14983 fnp
= &flp
->fnfields
.back ();
14985 /* Delay processing of the physname until later. */
14986 if (cu
->language
== language_cplus
)
14987 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14991 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14992 fnp
->physname
= physname
? physname
: "";
14995 fnp
->type
= alloc_type (objfile
);
14996 this_type
= read_type_die (die
, cu
);
14997 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
14999 int nparams
= this_type
->num_fields ();
15001 /* TYPE is the domain of this method, and THIS_TYPE is the type
15002 of the method itself (TYPE_CODE_METHOD). */
15003 smash_to_method_type (fnp
->type
, type
,
15004 TYPE_TARGET_TYPE (this_type
),
15005 TYPE_FIELDS (this_type
),
15006 this_type
->num_fields (),
15007 TYPE_VARARGS (this_type
));
15009 /* Handle static member functions.
15010 Dwarf2 has no clean way to discern C++ static and non-static
15011 member functions. G++ helps GDB by marking the first
15012 parameter for non-static member functions (which is the this
15013 pointer) as artificial. We obtain this information from
15014 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15015 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15016 fnp
->voffset
= VOFFSET_STATIC
;
15019 complaint (_("member function type missing for '%s'"),
15020 dwarf2_full_name (fieldname
, die
, cu
));
15022 /* Get fcontext from DW_AT_containing_type if present. */
15023 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15024 fnp
->fcontext
= die_containing_type (die
, cu
);
15026 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15027 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15029 /* Get accessibility. */
15030 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15031 if (attr
!= nullptr)
15032 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15034 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15035 switch (accessibility
)
15037 case DW_ACCESS_private
:
15038 fnp
->is_private
= 1;
15040 case DW_ACCESS_protected
:
15041 fnp
->is_protected
= 1;
15045 /* Check for artificial methods. */
15046 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15047 if (attr
&& DW_UNSND (attr
) != 0)
15048 fnp
->is_artificial
= 1;
15050 /* Check for defaulted methods. */
15051 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15052 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15053 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15055 /* Check for deleted methods. */
15056 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15057 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15058 fnp
->is_deleted
= 1;
15060 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15062 /* Get index in virtual function table if it is a virtual member
15063 function. For older versions of GCC, this is an offset in the
15064 appropriate virtual table, as specified by DW_AT_containing_type.
15065 For everyone else, it is an expression to be evaluated relative
15066 to the object address. */
15068 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15069 if (attr
!= nullptr)
15071 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15073 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15075 /* Old-style GCC. */
15076 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15078 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15079 || (DW_BLOCK (attr
)->size
> 1
15080 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15081 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15083 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15084 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15085 dwarf2_complex_location_expr_complaint ();
15087 fnp
->voffset
/= cu
->header
.addr_size
;
15091 dwarf2_complex_location_expr_complaint ();
15093 if (!fnp
->fcontext
)
15095 /* If there is no `this' field and no DW_AT_containing_type,
15096 we cannot actually find a base class context for the
15098 if (this_type
->num_fields () == 0
15099 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15101 complaint (_("cannot determine context for virtual member "
15102 "function \"%s\" (offset %s)"),
15103 fieldname
, sect_offset_str (die
->sect_off
));
15108 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15112 else if (attr
->form_is_section_offset ())
15114 dwarf2_complex_location_expr_complaint ();
15118 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15124 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15125 if (attr
&& DW_UNSND (attr
))
15127 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15128 complaint (_("Member function \"%s\" (offset %s) is virtual "
15129 "but the vtable offset is not specified"),
15130 fieldname
, sect_offset_str (die
->sect_off
));
15131 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15132 TYPE_CPLUS_DYNAMIC (type
) = 1;
15137 /* Create the vector of member function fields, and attach it to the type. */
15140 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15141 struct dwarf2_cu
*cu
)
15143 if (cu
->language
== language_ada
)
15144 error (_("unexpected member functions in Ada type"));
15146 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15147 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15149 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15151 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15153 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15154 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15156 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15157 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15158 fn_flp
->fn_fields
= (struct fn_field
*)
15159 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15161 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15162 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15165 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15168 /* Returns non-zero if NAME is the name of a vtable member in CU's
15169 language, zero otherwise. */
15171 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15173 static const char vptr
[] = "_vptr";
15175 /* Look for the C++ form of the vtable. */
15176 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15182 /* GCC outputs unnamed structures that are really pointers to member
15183 functions, with the ABI-specified layout. If TYPE describes
15184 such a structure, smash it into a member function type.
15186 GCC shouldn't do this; it should just output pointer to member DIEs.
15187 This is GCC PR debug/28767. */
15190 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15192 struct type
*pfn_type
, *self_type
, *new_type
;
15194 /* Check for a structure with no name and two children. */
15195 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15198 /* Check for __pfn and __delta members. */
15199 if (TYPE_FIELD_NAME (type
, 0) == NULL
15200 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15201 || TYPE_FIELD_NAME (type
, 1) == NULL
15202 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15205 /* Find the type of the method. */
15206 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15207 if (pfn_type
== NULL
15208 || pfn_type
->code () != TYPE_CODE_PTR
15209 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15212 /* Look for the "this" argument. */
15213 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15214 if (pfn_type
->num_fields () == 0
15215 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15216 || TYPE_FIELD_TYPE (pfn_type
, 0)->code () != TYPE_CODE_PTR
)
15219 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15220 new_type
= alloc_type (objfile
);
15221 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15222 TYPE_FIELDS (pfn_type
), pfn_type
->num_fields (),
15223 TYPE_VARARGS (pfn_type
));
15224 smash_to_methodptr_type (type
, new_type
);
15227 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15228 appropriate error checking and issuing complaints if there is a
15232 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15234 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15236 if (attr
== nullptr)
15239 if (!attr
->form_is_constant ())
15241 complaint (_("DW_AT_alignment must have constant form"
15242 " - DIE at %s [in module %s]"),
15243 sect_offset_str (die
->sect_off
),
15244 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15249 if (attr
->form
== DW_FORM_sdata
)
15251 LONGEST val
= DW_SND (attr
);
15254 complaint (_("DW_AT_alignment value must not be negative"
15255 " - DIE at %s [in module %s]"),
15256 sect_offset_str (die
->sect_off
),
15257 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15263 align
= DW_UNSND (attr
);
15267 complaint (_("DW_AT_alignment value must not be zero"
15268 " - DIE at %s [in module %s]"),
15269 sect_offset_str (die
->sect_off
),
15270 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15273 if ((align
& (align
- 1)) != 0)
15275 complaint (_("DW_AT_alignment value must be a power of 2"
15276 " - DIE at %s [in module %s]"),
15277 sect_offset_str (die
->sect_off
),
15278 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15285 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15286 the alignment for TYPE. */
15289 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15292 if (!set_type_align (type
, get_alignment (cu
, die
)))
15293 complaint (_("DW_AT_alignment value too large"
15294 " - DIE at %s [in module %s]"),
15295 sect_offset_str (die
->sect_off
),
15296 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15299 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15300 constant for a type, according to DWARF5 spec, Table 5.5. */
15303 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15308 case DW_CC_pass_by_reference
:
15309 case DW_CC_pass_by_value
:
15313 complaint (_("unrecognized DW_AT_calling_convention value "
15314 "(%s) for a type"), pulongest (value
));
15319 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15320 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15321 also according to GNU-specific values (see include/dwarf2.h). */
15324 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15329 case DW_CC_program
:
15333 case DW_CC_GNU_renesas_sh
:
15334 case DW_CC_GNU_borland_fastcall_i386
:
15335 case DW_CC_GDB_IBM_OpenCL
:
15339 complaint (_("unrecognized DW_AT_calling_convention value "
15340 "(%s) for a subroutine"), pulongest (value
));
15345 /* Called when we find the DIE that starts a structure or union scope
15346 (definition) to create a type for the structure or union. Fill in
15347 the type's name and general properties; the members will not be
15348 processed until process_structure_scope. A symbol table entry for
15349 the type will also not be done until process_structure_scope (assuming
15350 the type has a name).
15352 NOTE: we need to call these functions regardless of whether or not the
15353 DIE has a DW_AT_name attribute, since it might be an anonymous
15354 structure or union. This gets the type entered into our set of
15355 user defined types. */
15357 static struct type
*
15358 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15360 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15362 struct attribute
*attr
;
15365 /* If the definition of this type lives in .debug_types, read that type.
15366 Don't follow DW_AT_specification though, that will take us back up
15367 the chain and we want to go down. */
15368 attr
= die
->attr (DW_AT_signature
);
15369 if (attr
!= nullptr)
15371 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15373 /* The type's CU may not be the same as CU.
15374 Ensure TYPE is recorded with CU in die_type_hash. */
15375 return set_die_type (die
, type
, cu
);
15378 type
= alloc_type (objfile
);
15379 INIT_CPLUS_SPECIFIC (type
);
15381 name
= dwarf2_name (die
, cu
);
15384 if (cu
->language
== language_cplus
15385 || cu
->language
== language_d
15386 || cu
->language
== language_rust
)
15388 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15390 /* dwarf2_full_name might have already finished building the DIE's
15391 type. If so, there is no need to continue. */
15392 if (get_die_type (die
, cu
) != NULL
)
15393 return get_die_type (die
, cu
);
15395 type
->set_name (full_name
);
15399 /* The name is already allocated along with this objfile, so
15400 we don't need to duplicate it for the type. */
15401 type
->set_name (name
);
15405 if (die
->tag
== DW_TAG_structure_type
)
15407 type
->set_code (TYPE_CODE_STRUCT
);
15409 else if (die
->tag
== DW_TAG_union_type
)
15411 type
->set_code (TYPE_CODE_UNION
);
15415 type
->set_code (TYPE_CODE_STRUCT
);
15418 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15419 TYPE_DECLARED_CLASS (type
) = 1;
15421 /* Store the calling convention in the type if it's available in
15422 the die. Otherwise the calling convention remains set to
15423 the default value DW_CC_normal. */
15424 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15425 if (attr
!= nullptr
15426 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15428 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15429 TYPE_CPLUS_CALLING_CONVENTION (type
)
15430 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15433 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15434 if (attr
!= nullptr)
15436 if (attr
->form_is_constant ())
15437 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15440 struct dynamic_prop prop
;
15441 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15442 cu
->per_cu
->addr_type ()))
15443 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15444 TYPE_LENGTH (type
) = 0;
15449 TYPE_LENGTH (type
) = 0;
15452 maybe_set_alignment (cu
, die
, type
);
15454 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15456 /* ICC<14 does not output the required DW_AT_declaration on
15457 incomplete types, but gives them a size of zero. */
15458 TYPE_STUB (type
) = 1;
15461 TYPE_STUB_SUPPORTED (type
) = 1;
15463 if (die_is_declaration (die
, cu
))
15464 TYPE_STUB (type
) = 1;
15465 else if (attr
== NULL
&& die
->child
== NULL
15466 && producer_is_realview (cu
->producer
))
15467 /* RealView does not output the required DW_AT_declaration
15468 on incomplete types. */
15469 TYPE_STUB (type
) = 1;
15471 /* We need to add the type field to the die immediately so we don't
15472 infinitely recurse when dealing with pointers to the structure
15473 type within the structure itself. */
15474 set_die_type (die
, type
, cu
);
15476 /* set_die_type should be already done. */
15477 set_descriptive_type (type
, die
, cu
);
15482 static void handle_struct_member_die
15483 (struct die_info
*child_die
,
15485 struct field_info
*fi
,
15486 std::vector
<struct symbol
*> *template_args
,
15487 struct dwarf2_cu
*cu
);
15489 /* A helper for handle_struct_member_die that handles
15490 DW_TAG_variant_part. */
15493 handle_variant_part (struct die_info
*die
, struct type
*type
,
15494 struct field_info
*fi
,
15495 std::vector
<struct symbol
*> *template_args
,
15496 struct dwarf2_cu
*cu
)
15498 variant_part_builder
*new_part
;
15499 if (fi
->current_variant_part
== nullptr)
15501 fi
->variant_parts
.emplace_back ();
15502 new_part
= &fi
->variant_parts
.back ();
15504 else if (!fi
->current_variant_part
->processing_variant
)
15506 complaint (_("nested DW_TAG_variant_part seen "
15507 "- DIE at %s [in module %s]"),
15508 sect_offset_str (die
->sect_off
),
15509 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15514 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15515 current
.variant_parts
.emplace_back ();
15516 new_part
= ¤t
.variant_parts
.back ();
15519 /* When we recurse, we want callees to add to this new variant
15521 scoped_restore save_current_variant_part
15522 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15524 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15527 /* It's a univariant form, an extension we support. */
15529 else if (discr
->form_is_ref ())
15531 struct dwarf2_cu
*target_cu
= cu
;
15532 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15534 new_part
->discriminant_offset
= target_die
->sect_off
;
15538 complaint (_("DW_AT_discr does not have DIE reference form"
15539 " - DIE at %s [in module %s]"),
15540 sect_offset_str (die
->sect_off
),
15541 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15544 for (die_info
*child_die
= die
->child
;
15546 child_die
= child_die
->sibling
)
15547 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15550 /* A helper for handle_struct_member_die that handles
15554 handle_variant (struct die_info
*die
, struct type
*type
,
15555 struct field_info
*fi
,
15556 std::vector
<struct symbol
*> *template_args
,
15557 struct dwarf2_cu
*cu
)
15559 if (fi
->current_variant_part
== nullptr)
15561 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15562 "- DIE at %s [in module %s]"),
15563 sect_offset_str (die
->sect_off
),
15564 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15567 if (fi
->current_variant_part
->processing_variant
)
15569 complaint (_("nested DW_TAG_variant seen "
15570 "- DIE at %s [in module %s]"),
15571 sect_offset_str (die
->sect_off
),
15572 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15576 scoped_restore save_processing_variant
15577 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15580 fi
->current_variant_part
->variants
.emplace_back ();
15581 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15582 variant
.first_field
= fi
->fields
.size ();
15584 /* In a variant we want to get the discriminant and also add a
15585 field for our sole member child. */
15586 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15587 if (discr
== nullptr)
15589 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15590 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15591 variant
.default_branch
= true;
15593 variant
.discr_list_data
= DW_BLOCK (discr
);
15596 variant
.discriminant_value
= DW_UNSND (discr
);
15598 for (die_info
*variant_child
= die
->child
;
15599 variant_child
!= NULL
;
15600 variant_child
= variant_child
->sibling
)
15601 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15603 variant
.last_field
= fi
->fields
.size ();
15606 /* A helper for process_structure_scope that handles a single member
15610 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15611 struct field_info
*fi
,
15612 std::vector
<struct symbol
*> *template_args
,
15613 struct dwarf2_cu
*cu
)
15615 if (child_die
->tag
== DW_TAG_member
15616 || child_die
->tag
== DW_TAG_variable
)
15618 /* NOTE: carlton/2002-11-05: A C++ static data member
15619 should be a DW_TAG_member that is a declaration, but
15620 all versions of G++ as of this writing (so through at
15621 least 3.2.1) incorrectly generate DW_TAG_variable
15622 tags for them instead. */
15623 dwarf2_add_field (fi
, child_die
, cu
);
15625 else if (child_die
->tag
== DW_TAG_subprogram
)
15627 /* Rust doesn't have member functions in the C++ sense.
15628 However, it does emit ordinary functions as children
15629 of a struct DIE. */
15630 if (cu
->language
== language_rust
)
15631 read_func_scope (child_die
, cu
);
15634 /* C++ member function. */
15635 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15638 else if (child_die
->tag
== DW_TAG_inheritance
)
15640 /* C++ base class field. */
15641 dwarf2_add_field (fi
, child_die
, cu
);
15643 else if (type_can_define_types (child_die
))
15644 dwarf2_add_type_defn (fi
, child_die
, cu
);
15645 else if (child_die
->tag
== DW_TAG_template_type_param
15646 || child_die
->tag
== DW_TAG_template_value_param
)
15648 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15651 template_args
->push_back (arg
);
15653 else if (child_die
->tag
== DW_TAG_variant_part
)
15654 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15655 else if (child_die
->tag
== DW_TAG_variant
)
15656 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15659 /* Finish creating a structure or union type, including filling in
15660 its members and creating a symbol for it. */
15663 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15665 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15666 struct die_info
*child_die
;
15669 type
= get_die_type (die
, cu
);
15671 type
= read_structure_type (die
, cu
);
15673 bool has_template_parameters
= false;
15674 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15676 struct field_info fi
;
15677 std::vector
<struct symbol
*> template_args
;
15679 child_die
= die
->child
;
15681 while (child_die
&& child_die
->tag
)
15683 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15684 child_die
= child_die
->sibling
;
15687 /* Attach template arguments to type. */
15688 if (!template_args
.empty ())
15690 has_template_parameters
= true;
15691 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15692 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15693 TYPE_TEMPLATE_ARGUMENTS (type
)
15694 = XOBNEWVEC (&objfile
->objfile_obstack
,
15696 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15697 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15698 template_args
.data (),
15699 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15700 * sizeof (struct symbol
*)));
15703 /* Attach fields and member functions to the type. */
15704 if (fi
.nfields () > 0)
15705 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15706 if (!fi
.fnfieldlists
.empty ())
15708 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15710 /* Get the type which refers to the base class (possibly this
15711 class itself) which contains the vtable pointer for the current
15712 class from the DW_AT_containing_type attribute. This use of
15713 DW_AT_containing_type is a GNU extension. */
15715 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15717 struct type
*t
= die_containing_type (die
, cu
);
15719 set_type_vptr_basetype (type
, t
);
15724 /* Our own class provides vtbl ptr. */
15725 for (i
= t
->num_fields () - 1;
15726 i
>= TYPE_N_BASECLASSES (t
);
15729 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15731 if (is_vtable_name (fieldname
, cu
))
15733 set_type_vptr_fieldno (type
, i
);
15738 /* Complain if virtual function table field not found. */
15739 if (i
< TYPE_N_BASECLASSES (t
))
15740 complaint (_("virtual function table pointer "
15741 "not found when defining class '%s'"),
15742 type
->name () ? type
->name () : "");
15746 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15749 else if (cu
->producer
15750 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15752 /* The IBM XLC compiler does not provide direct indication
15753 of the containing type, but the vtable pointer is
15754 always named __vfp. */
15758 for (i
= type
->num_fields () - 1;
15759 i
>= TYPE_N_BASECLASSES (type
);
15762 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15764 set_type_vptr_fieldno (type
, i
);
15765 set_type_vptr_basetype (type
, type
);
15772 /* Copy fi.typedef_field_list linked list elements content into the
15773 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15774 if (!fi
.typedef_field_list
.empty ())
15776 int count
= fi
.typedef_field_list
.size ();
15778 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15779 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15780 = ((struct decl_field
*)
15782 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15783 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15785 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15786 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15789 /* Copy fi.nested_types_list linked list elements content into the
15790 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15791 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15793 int count
= fi
.nested_types_list
.size ();
15795 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15796 TYPE_NESTED_TYPES_ARRAY (type
)
15797 = ((struct decl_field
*)
15798 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15799 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15801 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15802 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15806 quirk_gcc_member_function_pointer (type
, objfile
);
15807 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15808 cu
->rust_unions
.push_back (type
);
15810 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15811 snapshots) has been known to create a die giving a declaration
15812 for a class that has, as a child, a die giving a definition for a
15813 nested class. So we have to process our children even if the
15814 current die is a declaration. Normally, of course, a declaration
15815 won't have any children at all. */
15817 child_die
= die
->child
;
15819 while (child_die
!= NULL
&& child_die
->tag
)
15821 if (child_die
->tag
== DW_TAG_member
15822 || child_die
->tag
== DW_TAG_variable
15823 || child_die
->tag
== DW_TAG_inheritance
15824 || child_die
->tag
== DW_TAG_template_value_param
15825 || child_die
->tag
== DW_TAG_template_type_param
)
15830 process_die (child_die
, cu
);
15832 child_die
= child_die
->sibling
;
15835 /* Do not consider external references. According to the DWARF standard,
15836 these DIEs are identified by the fact that they have no byte_size
15837 attribute, and a declaration attribute. */
15838 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15839 || !die_is_declaration (die
, cu
)
15840 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15842 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15844 if (has_template_parameters
)
15846 struct symtab
*symtab
;
15847 if (sym
!= nullptr)
15848 symtab
= symbol_symtab (sym
);
15849 else if (cu
->line_header
!= nullptr)
15851 /* Any related symtab will do. */
15853 = cu
->line_header
->file_names ()[0].symtab
;
15858 complaint (_("could not find suitable "
15859 "symtab for template parameter"
15860 " - DIE at %s [in module %s]"),
15861 sect_offset_str (die
->sect_off
),
15862 objfile_name (objfile
));
15865 if (symtab
!= nullptr)
15867 /* Make sure that the symtab is set on the new symbols.
15868 Even though they don't appear in this symtab directly,
15869 other parts of gdb assume that symbols do, and this is
15870 reasonably true. */
15871 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15872 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15878 /* Assuming DIE is an enumeration type, and TYPE is its associated
15879 type, update TYPE using some information only available in DIE's
15880 children. In particular, the fields are computed. */
15883 update_enumeration_type_from_children (struct die_info
*die
,
15885 struct dwarf2_cu
*cu
)
15887 struct die_info
*child_die
;
15888 int unsigned_enum
= 1;
15891 auto_obstack obstack
;
15892 std::vector
<struct field
> fields
;
15894 for (child_die
= die
->child
;
15895 child_die
!= NULL
&& child_die
->tag
;
15896 child_die
= child_die
->sibling
)
15898 struct attribute
*attr
;
15900 const gdb_byte
*bytes
;
15901 struct dwarf2_locexpr_baton
*baton
;
15904 if (child_die
->tag
!= DW_TAG_enumerator
)
15907 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15911 name
= dwarf2_name (child_die
, cu
);
15913 name
= "<anonymous enumerator>";
15915 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15916 &value
, &bytes
, &baton
);
15924 if (count_one_bits_ll (value
) >= 2)
15928 fields
.emplace_back ();
15929 struct field
&field
= fields
.back ();
15930 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
15931 SET_FIELD_ENUMVAL (field
, value
);
15934 if (!fields
.empty ())
15936 type
->set_num_fields (fields
.size ());
15937 TYPE_FIELDS (type
) = (struct field
*)
15938 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ());
15939 memcpy (TYPE_FIELDS (type
), fields
.data (),
15940 sizeof (struct field
) * fields
.size ());
15944 TYPE_UNSIGNED (type
) = 1;
15946 TYPE_FLAG_ENUM (type
) = 1;
15949 /* Given a DW_AT_enumeration_type die, set its type. We do not
15950 complete the type's fields yet, or create any symbols. */
15952 static struct type
*
15953 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15955 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15957 struct attribute
*attr
;
15960 /* If the definition of this type lives in .debug_types, read that type.
15961 Don't follow DW_AT_specification though, that will take us back up
15962 the chain and we want to go down. */
15963 attr
= die
->attr (DW_AT_signature
);
15964 if (attr
!= nullptr)
15966 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15968 /* The type's CU may not be the same as CU.
15969 Ensure TYPE is recorded with CU in die_type_hash. */
15970 return set_die_type (die
, type
, cu
);
15973 type
= alloc_type (objfile
);
15975 type
->set_code (TYPE_CODE_ENUM
);
15976 name
= dwarf2_full_name (NULL
, die
, cu
);
15978 type
->set_name (name
);
15980 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15983 struct type
*underlying_type
= die_type (die
, cu
);
15985 TYPE_TARGET_TYPE (type
) = underlying_type
;
15988 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15989 if (attr
!= nullptr)
15991 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15995 TYPE_LENGTH (type
) = 0;
15998 maybe_set_alignment (cu
, die
, type
);
16000 /* The enumeration DIE can be incomplete. In Ada, any type can be
16001 declared as private in the package spec, and then defined only
16002 inside the package body. Such types are known as Taft Amendment
16003 Types. When another package uses such a type, an incomplete DIE
16004 may be generated by the compiler. */
16005 if (die_is_declaration (die
, cu
))
16006 TYPE_STUB (type
) = 1;
16008 /* If this type has an underlying type that is not a stub, then we
16009 may use its attributes. We always use the "unsigned" attribute
16010 in this situation, because ordinarily we guess whether the type
16011 is unsigned -- but the guess can be wrong and the underlying type
16012 can tell us the reality. However, we defer to a local size
16013 attribute if one exists, because this lets the compiler override
16014 the underlying type if needed. */
16015 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16017 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16018 underlying_type
= check_typedef (underlying_type
);
16019 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
16020 if (TYPE_LENGTH (type
) == 0)
16021 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16022 if (TYPE_RAW_ALIGN (type
) == 0
16023 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16024 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16027 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16029 set_die_type (die
, type
, cu
);
16031 /* Finish the creation of this type by using the enum's children.
16032 Note that, as usual, this must come after set_die_type to avoid
16033 infinite recursion when trying to compute the names of the
16035 update_enumeration_type_from_children (die
, type
, cu
);
16040 /* Given a pointer to a die which begins an enumeration, process all
16041 the dies that define the members of the enumeration, and create the
16042 symbol for the enumeration type.
16044 NOTE: We reverse the order of the element list. */
16047 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16049 struct type
*this_type
;
16051 this_type
= get_die_type (die
, cu
);
16052 if (this_type
== NULL
)
16053 this_type
= read_enumeration_type (die
, cu
);
16055 if (die
->child
!= NULL
)
16057 struct die_info
*child_die
;
16060 child_die
= die
->child
;
16061 while (child_die
&& child_die
->tag
)
16063 if (child_die
->tag
!= DW_TAG_enumerator
)
16065 process_die (child_die
, cu
);
16069 name
= dwarf2_name (child_die
, cu
);
16071 new_symbol (child_die
, this_type
, cu
);
16074 child_die
= child_die
->sibling
;
16078 /* If we are reading an enum from a .debug_types unit, and the enum
16079 is a declaration, and the enum is not the signatured type in the
16080 unit, then we do not want to add a symbol for it. Adding a
16081 symbol would in some cases obscure the true definition of the
16082 enum, giving users an incomplete type when the definition is
16083 actually available. Note that we do not want to do this for all
16084 enums which are just declarations, because C++0x allows forward
16085 enum declarations. */
16086 if (cu
->per_cu
->is_debug_types
16087 && die_is_declaration (die
, cu
))
16089 struct signatured_type
*sig_type
;
16091 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16092 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16093 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16097 new_symbol (die
, this_type
, cu
);
16100 /* Extract all information from a DW_TAG_array_type DIE and put it in
16101 the DIE's type field. For now, this only handles one dimensional
16104 static struct type
*
16105 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16107 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16108 struct die_info
*child_die
;
16110 struct type
*element_type
, *range_type
, *index_type
;
16111 struct attribute
*attr
;
16113 struct dynamic_prop
*byte_stride_prop
= NULL
;
16114 unsigned int bit_stride
= 0;
16116 element_type
= die_type (die
, cu
);
16118 /* The die_type call above may have already set the type for this DIE. */
16119 type
= get_die_type (die
, cu
);
16123 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16127 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16130 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16131 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16135 complaint (_("unable to read array DW_AT_byte_stride "
16136 " - DIE at %s [in module %s]"),
16137 sect_offset_str (die
->sect_off
),
16138 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16139 /* Ignore this attribute. We will likely not be able to print
16140 arrays of this type correctly, but there is little we can do
16141 to help if we cannot read the attribute's value. */
16142 byte_stride_prop
= NULL
;
16146 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16148 bit_stride
= DW_UNSND (attr
);
16150 /* Irix 6.2 native cc creates array types without children for
16151 arrays with unspecified length. */
16152 if (die
->child
== NULL
)
16154 index_type
= objfile_type (objfile
)->builtin_int
;
16155 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16156 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16157 byte_stride_prop
, bit_stride
);
16158 return set_die_type (die
, type
, cu
);
16161 std::vector
<struct type
*> range_types
;
16162 child_die
= die
->child
;
16163 while (child_die
&& child_die
->tag
)
16165 if (child_die
->tag
== DW_TAG_subrange_type
)
16167 struct type
*child_type
= read_type_die (child_die
, cu
);
16169 if (child_type
!= NULL
)
16171 /* The range type was succesfully read. Save it for the
16172 array type creation. */
16173 range_types
.push_back (child_type
);
16176 child_die
= child_die
->sibling
;
16179 /* Dwarf2 dimensions are output from left to right, create the
16180 necessary array types in backwards order. */
16182 type
= element_type
;
16184 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16188 while (i
< range_types
.size ())
16189 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16190 byte_stride_prop
, bit_stride
);
16194 size_t ndim
= range_types
.size ();
16196 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16197 byte_stride_prop
, bit_stride
);
16200 /* Understand Dwarf2 support for vector types (like they occur on
16201 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16202 array type. This is not part of the Dwarf2/3 standard yet, but a
16203 custom vendor extension. The main difference between a regular
16204 array and the vector variant is that vectors are passed by value
16206 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16207 if (attr
!= nullptr)
16208 make_vector_type (type
);
16210 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16211 implementation may choose to implement triple vectors using this
16213 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16214 if (attr
!= nullptr)
16216 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16217 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16219 complaint (_("DW_AT_byte_size for array type smaller "
16220 "than the total size of elements"));
16223 name
= dwarf2_name (die
, cu
);
16225 type
->set_name (name
);
16227 maybe_set_alignment (cu
, die
, type
);
16229 /* Install the type in the die. */
16230 set_die_type (die
, type
, cu
);
16232 /* set_die_type should be already done. */
16233 set_descriptive_type (type
, die
, cu
);
16238 static enum dwarf_array_dim_ordering
16239 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16241 struct attribute
*attr
;
16243 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16245 if (attr
!= nullptr)
16246 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16248 /* GNU F77 is a special case, as at 08/2004 array type info is the
16249 opposite order to the dwarf2 specification, but data is still
16250 laid out as per normal fortran.
16252 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16253 version checking. */
16255 if (cu
->language
== language_fortran
16256 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16258 return DW_ORD_row_major
;
16261 switch (cu
->language_defn
->la_array_ordering
)
16263 case array_column_major
:
16264 return DW_ORD_col_major
;
16265 case array_row_major
:
16267 return DW_ORD_row_major
;
16271 /* Extract all information from a DW_TAG_set_type DIE and put it in
16272 the DIE's type field. */
16274 static struct type
*
16275 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16277 struct type
*domain_type
, *set_type
;
16278 struct attribute
*attr
;
16280 domain_type
= die_type (die
, cu
);
16282 /* The die_type call above may have already set the type for this DIE. */
16283 set_type
= get_die_type (die
, cu
);
16287 set_type
= create_set_type (NULL
, domain_type
);
16289 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16290 if (attr
!= nullptr)
16291 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16293 maybe_set_alignment (cu
, die
, set_type
);
16295 return set_die_type (die
, set_type
, cu
);
16298 /* A helper for read_common_block that creates a locexpr baton.
16299 SYM is the symbol which we are marking as computed.
16300 COMMON_DIE is the DIE for the common block.
16301 COMMON_LOC is the location expression attribute for the common
16303 MEMBER_LOC is the location expression attribute for the particular
16304 member of the common block that we are processing.
16305 CU is the CU from which the above come. */
16308 mark_common_block_symbol_computed (struct symbol
*sym
,
16309 struct die_info
*common_die
,
16310 struct attribute
*common_loc
,
16311 struct attribute
*member_loc
,
16312 struct dwarf2_cu
*cu
)
16314 struct dwarf2_per_objfile
*dwarf2_per_objfile
16315 = cu
->per_cu
->dwarf2_per_objfile
;
16316 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16317 struct dwarf2_locexpr_baton
*baton
;
16319 unsigned int cu_off
;
16320 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16321 LONGEST offset
= 0;
16323 gdb_assert (common_loc
&& member_loc
);
16324 gdb_assert (common_loc
->form_is_block ());
16325 gdb_assert (member_loc
->form_is_block ()
16326 || member_loc
->form_is_constant ());
16328 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16329 baton
->per_cu
= cu
->per_cu
;
16330 gdb_assert (baton
->per_cu
);
16332 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16334 if (member_loc
->form_is_constant ())
16336 offset
= member_loc
->constant_value (0);
16337 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16340 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16342 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16345 *ptr
++ = DW_OP_call4
;
16346 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16347 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16350 if (member_loc
->form_is_constant ())
16352 *ptr
++ = DW_OP_addr
;
16353 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16354 ptr
+= cu
->header
.addr_size
;
16358 /* We have to copy the data here, because DW_OP_call4 will only
16359 use a DW_AT_location attribute. */
16360 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16361 ptr
+= DW_BLOCK (member_loc
)->size
;
16364 *ptr
++ = DW_OP_plus
;
16365 gdb_assert (ptr
- baton
->data
== baton
->size
);
16367 SYMBOL_LOCATION_BATON (sym
) = baton
;
16368 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16371 /* Create appropriate locally-scoped variables for all the
16372 DW_TAG_common_block entries. Also create a struct common_block
16373 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16374 is used to separate the common blocks name namespace from regular
16378 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16380 struct attribute
*attr
;
16382 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16383 if (attr
!= nullptr)
16385 /* Support the .debug_loc offsets. */
16386 if (attr
->form_is_block ())
16390 else if (attr
->form_is_section_offset ())
16392 dwarf2_complex_location_expr_complaint ();
16397 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16398 "common block member");
16403 if (die
->child
!= NULL
)
16405 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16406 struct die_info
*child_die
;
16407 size_t n_entries
= 0, size
;
16408 struct common_block
*common_block
;
16409 struct symbol
*sym
;
16411 for (child_die
= die
->child
;
16412 child_die
&& child_die
->tag
;
16413 child_die
= child_die
->sibling
)
16416 size
= (sizeof (struct common_block
)
16417 + (n_entries
- 1) * sizeof (struct symbol
*));
16419 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16421 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16422 common_block
->n_entries
= 0;
16424 for (child_die
= die
->child
;
16425 child_die
&& child_die
->tag
;
16426 child_die
= child_die
->sibling
)
16428 /* Create the symbol in the DW_TAG_common_block block in the current
16430 sym
= new_symbol (child_die
, NULL
, cu
);
16433 struct attribute
*member_loc
;
16435 common_block
->contents
[common_block
->n_entries
++] = sym
;
16437 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16441 /* GDB has handled this for a long time, but it is
16442 not specified by DWARF. It seems to have been
16443 emitted by gfortran at least as recently as:
16444 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16445 complaint (_("Variable in common block has "
16446 "DW_AT_data_member_location "
16447 "- DIE at %s [in module %s]"),
16448 sect_offset_str (child_die
->sect_off
),
16449 objfile_name (objfile
));
16451 if (member_loc
->form_is_section_offset ())
16452 dwarf2_complex_location_expr_complaint ();
16453 else if (member_loc
->form_is_constant ()
16454 || member_loc
->form_is_block ())
16456 if (attr
!= nullptr)
16457 mark_common_block_symbol_computed (sym
, die
, attr
,
16461 dwarf2_complex_location_expr_complaint ();
16466 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16467 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16471 /* Create a type for a C++ namespace. */
16473 static struct type
*
16474 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16476 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16477 const char *previous_prefix
, *name
;
16481 /* For extensions, reuse the type of the original namespace. */
16482 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16484 struct die_info
*ext_die
;
16485 struct dwarf2_cu
*ext_cu
= cu
;
16487 ext_die
= dwarf2_extension (die
, &ext_cu
);
16488 type
= read_type_die (ext_die
, ext_cu
);
16490 /* EXT_CU may not be the same as CU.
16491 Ensure TYPE is recorded with CU in die_type_hash. */
16492 return set_die_type (die
, type
, cu
);
16495 name
= namespace_name (die
, &is_anonymous
, cu
);
16497 /* Now build the name of the current namespace. */
16499 previous_prefix
= determine_prefix (die
, cu
);
16500 if (previous_prefix
[0] != '\0')
16501 name
= typename_concat (&objfile
->objfile_obstack
,
16502 previous_prefix
, name
, 0, cu
);
16504 /* Create the type. */
16505 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16507 return set_die_type (die
, type
, cu
);
16510 /* Read a namespace scope. */
16513 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16515 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16518 /* Add a symbol associated to this if we haven't seen the namespace
16519 before. Also, add a using directive if it's an anonymous
16522 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16526 type
= read_type_die (die
, cu
);
16527 new_symbol (die
, type
, cu
);
16529 namespace_name (die
, &is_anonymous
, cu
);
16532 const char *previous_prefix
= determine_prefix (die
, cu
);
16534 std::vector
<const char *> excludes
;
16535 add_using_directive (using_directives (cu
),
16536 previous_prefix
, type
->name (), NULL
,
16537 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16541 if (die
->child
!= NULL
)
16543 struct die_info
*child_die
= die
->child
;
16545 while (child_die
&& child_die
->tag
)
16547 process_die (child_die
, cu
);
16548 child_die
= child_die
->sibling
;
16553 /* Read a Fortran module as type. This DIE can be only a declaration used for
16554 imported module. Still we need that type as local Fortran "use ... only"
16555 declaration imports depend on the created type in determine_prefix. */
16557 static struct type
*
16558 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16560 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16561 const char *module_name
;
16564 module_name
= dwarf2_name (die
, cu
);
16565 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16567 return set_die_type (die
, type
, cu
);
16570 /* Read a Fortran module. */
16573 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16575 struct die_info
*child_die
= die
->child
;
16578 type
= read_type_die (die
, cu
);
16579 new_symbol (die
, type
, cu
);
16581 while (child_die
&& child_die
->tag
)
16583 process_die (child_die
, cu
);
16584 child_die
= child_die
->sibling
;
16588 /* Return the name of the namespace represented by DIE. Set
16589 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16592 static const char *
16593 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16595 struct die_info
*current_die
;
16596 const char *name
= NULL
;
16598 /* Loop through the extensions until we find a name. */
16600 for (current_die
= die
;
16601 current_die
!= NULL
;
16602 current_die
= dwarf2_extension (die
, &cu
))
16604 /* We don't use dwarf2_name here so that we can detect the absence
16605 of a name -> anonymous namespace. */
16606 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16612 /* Is it an anonymous namespace? */
16614 *is_anonymous
= (name
== NULL
);
16616 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16621 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16622 the user defined type vector. */
16624 static struct type
*
16625 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16627 struct gdbarch
*gdbarch
16628 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16629 struct comp_unit_head
*cu_header
= &cu
->header
;
16631 struct attribute
*attr_byte_size
;
16632 struct attribute
*attr_address_class
;
16633 int byte_size
, addr_class
;
16634 struct type
*target_type
;
16636 target_type
= die_type (die
, cu
);
16638 /* The die_type call above may have already set the type for this DIE. */
16639 type
= get_die_type (die
, cu
);
16643 type
= lookup_pointer_type (target_type
);
16645 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16646 if (attr_byte_size
)
16647 byte_size
= DW_UNSND (attr_byte_size
);
16649 byte_size
= cu_header
->addr_size
;
16651 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16652 if (attr_address_class
)
16653 addr_class
= DW_UNSND (attr_address_class
);
16655 addr_class
= DW_ADDR_none
;
16657 ULONGEST alignment
= get_alignment (cu
, die
);
16659 /* If the pointer size, alignment, or address class is different
16660 than the default, create a type variant marked as such and set
16661 the length accordingly. */
16662 if (TYPE_LENGTH (type
) != byte_size
16663 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16664 && alignment
!= TYPE_RAW_ALIGN (type
))
16665 || addr_class
!= DW_ADDR_none
)
16667 if (gdbarch_address_class_type_flags_p (gdbarch
))
16671 type_flags
= gdbarch_address_class_type_flags
16672 (gdbarch
, byte_size
, addr_class
);
16673 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16675 type
= make_type_with_address_space (type
, type_flags
);
16677 else if (TYPE_LENGTH (type
) != byte_size
)
16679 complaint (_("invalid pointer size %d"), byte_size
);
16681 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16683 complaint (_("Invalid DW_AT_alignment"
16684 " - DIE at %s [in module %s]"),
16685 sect_offset_str (die
->sect_off
),
16686 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16690 /* Should we also complain about unhandled address classes? */
16694 TYPE_LENGTH (type
) = byte_size
;
16695 set_type_align (type
, alignment
);
16696 return set_die_type (die
, type
, cu
);
16699 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16700 the user defined type vector. */
16702 static struct type
*
16703 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16706 struct type
*to_type
;
16707 struct type
*domain
;
16709 to_type
= die_type (die
, cu
);
16710 domain
= die_containing_type (die
, cu
);
16712 /* The calls above may have already set the type for this DIE. */
16713 type
= get_die_type (die
, cu
);
16717 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
16718 type
= lookup_methodptr_type (to_type
);
16719 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
16721 struct type
*new_type
16722 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16724 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16725 TYPE_FIELDS (to_type
), to_type
->num_fields (),
16726 TYPE_VARARGS (to_type
));
16727 type
= lookup_methodptr_type (new_type
);
16730 type
= lookup_memberptr_type (to_type
, domain
);
16732 return set_die_type (die
, type
, cu
);
16735 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16736 the user defined type vector. */
16738 static struct type
*
16739 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16740 enum type_code refcode
)
16742 struct comp_unit_head
*cu_header
= &cu
->header
;
16743 struct type
*type
, *target_type
;
16744 struct attribute
*attr
;
16746 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16748 target_type
= die_type (die
, cu
);
16750 /* The die_type call above may have already set the type for this DIE. */
16751 type
= get_die_type (die
, cu
);
16755 type
= lookup_reference_type (target_type
, refcode
);
16756 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16757 if (attr
!= nullptr)
16759 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16763 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16765 maybe_set_alignment (cu
, die
, type
);
16766 return set_die_type (die
, type
, cu
);
16769 /* Add the given cv-qualifiers to the element type of the array. GCC
16770 outputs DWARF type qualifiers that apply to an array, not the
16771 element type. But GDB relies on the array element type to carry
16772 the cv-qualifiers. This mimics section 6.7.3 of the C99
16775 static struct type
*
16776 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16777 struct type
*base_type
, int cnst
, int voltl
)
16779 struct type
*el_type
, *inner_array
;
16781 base_type
= copy_type (base_type
);
16782 inner_array
= base_type
;
16784 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
16786 TYPE_TARGET_TYPE (inner_array
) =
16787 copy_type (TYPE_TARGET_TYPE (inner_array
));
16788 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16791 el_type
= TYPE_TARGET_TYPE (inner_array
);
16792 cnst
|= TYPE_CONST (el_type
);
16793 voltl
|= TYPE_VOLATILE (el_type
);
16794 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16796 return set_die_type (die
, base_type
, cu
);
16799 static struct type
*
16800 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16802 struct type
*base_type
, *cv_type
;
16804 base_type
= die_type (die
, cu
);
16806 /* The die_type call above may have already set the type for this DIE. */
16807 cv_type
= get_die_type (die
, cu
);
16811 /* In case the const qualifier is applied to an array type, the element type
16812 is so qualified, not the array type (section 6.7.3 of C99). */
16813 if (base_type
->code () == TYPE_CODE_ARRAY
)
16814 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16816 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16817 return set_die_type (die
, cv_type
, cu
);
16820 static struct type
*
16821 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16823 struct type
*base_type
, *cv_type
;
16825 base_type
= die_type (die
, cu
);
16827 /* The die_type call above may have already set the type for this DIE. */
16828 cv_type
= get_die_type (die
, cu
);
16832 /* In case the volatile qualifier is applied to an array type, the
16833 element type is so qualified, not the array type (section 6.7.3
16835 if (base_type
->code () == TYPE_CODE_ARRAY
)
16836 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16838 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16839 return set_die_type (die
, cv_type
, cu
);
16842 /* Handle DW_TAG_restrict_type. */
16844 static struct type
*
16845 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16847 struct type
*base_type
, *cv_type
;
16849 base_type
= die_type (die
, cu
);
16851 /* The die_type call above may have already set the type for this DIE. */
16852 cv_type
= get_die_type (die
, cu
);
16856 cv_type
= make_restrict_type (base_type
);
16857 return set_die_type (die
, cv_type
, cu
);
16860 /* Handle DW_TAG_atomic_type. */
16862 static struct type
*
16863 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16865 struct type
*base_type
, *cv_type
;
16867 base_type
= die_type (die
, cu
);
16869 /* The die_type call above may have already set the type for this DIE. */
16870 cv_type
= get_die_type (die
, cu
);
16874 cv_type
= make_atomic_type (base_type
);
16875 return set_die_type (die
, cv_type
, cu
);
16878 /* Extract all information from a DW_TAG_string_type DIE and add to
16879 the user defined type vector. It isn't really a user defined type,
16880 but it behaves like one, with other DIE's using an AT_user_def_type
16881 attribute to reference it. */
16883 static struct type
*
16884 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16886 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16887 struct gdbarch
*gdbarch
= objfile
->arch ();
16888 struct type
*type
, *range_type
, *index_type
, *char_type
;
16889 struct attribute
*attr
;
16890 struct dynamic_prop prop
;
16891 bool length_is_constant
= true;
16894 /* There are a couple of places where bit sizes might be made use of
16895 when parsing a DW_TAG_string_type, however, no producer that we know
16896 of make use of these. Handling bit sizes that are a multiple of the
16897 byte size is easy enough, but what about other bit sizes? Lets deal
16898 with that problem when we have to. Warn about these attributes being
16899 unsupported, then parse the type and ignore them like we always
16901 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16902 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16904 static bool warning_printed
= false;
16905 if (!warning_printed
)
16907 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16908 "currently supported on DW_TAG_string_type."));
16909 warning_printed
= true;
16913 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16914 if (attr
!= nullptr && !attr
->form_is_constant ())
16916 /* The string length describes the location at which the length of
16917 the string can be found. The size of the length field can be
16918 specified with one of the attributes below. */
16919 struct type
*prop_type
;
16920 struct attribute
*len
16921 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16922 if (len
== nullptr)
16923 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16924 if (len
!= nullptr && len
->form_is_constant ())
16926 /* Pass 0 as the default as we know this attribute is constant
16927 and the default value will not be returned. */
16928 LONGEST sz
= len
->constant_value (0);
16929 prop_type
= cu
->per_cu
->int_type (sz
, true);
16933 /* If the size is not specified then we assume it is the size of
16934 an address on this target. */
16935 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16938 /* Convert the attribute into a dynamic property. */
16939 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16942 length_is_constant
= false;
16944 else if (attr
!= nullptr)
16946 /* This DW_AT_string_length just contains the length with no
16947 indirection. There's no need to create a dynamic property in this
16948 case. Pass 0 for the default value as we know it will not be
16949 returned in this case. */
16950 length
= attr
->constant_value (0);
16952 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16954 /* We don't currently support non-constant byte sizes for strings. */
16955 length
= attr
->constant_value (1);
16959 /* Use 1 as a fallback length if we have nothing else. */
16963 index_type
= objfile_type (objfile
)->builtin_int
;
16964 if (length_is_constant
)
16965 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16968 struct dynamic_prop low_bound
;
16970 low_bound
.kind
= PROP_CONST
;
16971 low_bound
.data
.const_val
= 1;
16972 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16974 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16975 type
= create_string_type (NULL
, char_type
, range_type
);
16977 return set_die_type (die
, type
, cu
);
16980 /* Assuming that DIE corresponds to a function, returns nonzero
16981 if the function is prototyped. */
16984 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16986 struct attribute
*attr
;
16988 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16989 if (attr
&& (DW_UNSND (attr
) != 0))
16992 /* The DWARF standard implies that the DW_AT_prototyped attribute
16993 is only meaningful for C, but the concept also extends to other
16994 languages that allow unprototyped functions (Eg: Objective C).
16995 For all other languages, assume that functions are always
16997 if (cu
->language
!= language_c
16998 && cu
->language
!= language_objc
16999 && cu
->language
!= language_opencl
)
17002 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17003 prototyped and unprototyped functions; default to prototyped,
17004 since that is more common in modern code (and RealView warns
17005 about unprototyped functions). */
17006 if (producer_is_realview (cu
->producer
))
17012 /* Handle DIES due to C code like:
17016 int (*funcp)(int a, long l);
17020 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17022 static struct type
*
17023 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17025 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17026 struct type
*type
; /* Type that this function returns. */
17027 struct type
*ftype
; /* Function that returns above type. */
17028 struct attribute
*attr
;
17030 type
= die_type (die
, cu
);
17032 /* The die_type call above may have already set the type for this DIE. */
17033 ftype
= get_die_type (die
, cu
);
17037 ftype
= lookup_function_type (type
);
17039 if (prototyped_function_p (die
, cu
))
17040 TYPE_PROTOTYPED (ftype
) = 1;
17042 /* Store the calling convention in the type if it's available in
17043 the subroutine die. Otherwise set the calling convention to
17044 the default value DW_CC_normal. */
17045 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17046 if (attr
!= nullptr
17047 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17048 TYPE_CALLING_CONVENTION (ftype
)
17049 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17050 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17051 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17053 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17055 /* Record whether the function returns normally to its caller or not
17056 if the DWARF producer set that information. */
17057 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17058 if (attr
&& (DW_UNSND (attr
) != 0))
17059 TYPE_NO_RETURN (ftype
) = 1;
17061 /* We need to add the subroutine type to the die immediately so
17062 we don't infinitely recurse when dealing with parameters
17063 declared as the same subroutine type. */
17064 set_die_type (die
, ftype
, cu
);
17066 if (die
->child
!= NULL
)
17068 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17069 struct die_info
*child_die
;
17070 int nparams
, iparams
;
17072 /* Count the number of parameters.
17073 FIXME: GDB currently ignores vararg functions, but knows about
17074 vararg member functions. */
17076 child_die
= die
->child
;
17077 while (child_die
&& child_die
->tag
)
17079 if (child_die
->tag
== DW_TAG_formal_parameter
)
17081 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17082 TYPE_VARARGS (ftype
) = 1;
17083 child_die
= child_die
->sibling
;
17086 /* Allocate storage for parameters and fill them in. */
17087 ftype
->set_num_fields (nparams
);
17088 TYPE_FIELDS (ftype
) = (struct field
*)
17089 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17091 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17092 even if we error out during the parameters reading below. */
17093 for (iparams
= 0; iparams
< nparams
; iparams
++)
17094 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17097 child_die
= die
->child
;
17098 while (child_die
&& child_die
->tag
)
17100 if (child_die
->tag
== DW_TAG_formal_parameter
)
17102 struct type
*arg_type
;
17104 /* DWARF version 2 has no clean way to discern C++
17105 static and non-static member functions. G++ helps
17106 GDB by marking the first parameter for non-static
17107 member functions (which is the this pointer) as
17108 artificial. We pass this information to
17109 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17111 DWARF version 3 added DW_AT_object_pointer, which GCC
17112 4.5 does not yet generate. */
17113 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17114 if (attr
!= nullptr)
17115 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17117 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17118 arg_type
= die_type (child_die
, cu
);
17120 /* RealView does not mark THIS as const, which the testsuite
17121 expects. GCC marks THIS as const in method definitions,
17122 but not in the class specifications (GCC PR 43053). */
17123 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17124 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17127 struct dwarf2_cu
*arg_cu
= cu
;
17128 const char *name
= dwarf2_name (child_die
, cu
);
17130 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17131 if (attr
!= nullptr)
17133 /* If the compiler emits this, use it. */
17134 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17137 else if (name
&& strcmp (name
, "this") == 0)
17138 /* Function definitions will have the argument names. */
17140 else if (name
== NULL
&& iparams
== 0)
17141 /* Declarations may not have the names, so like
17142 elsewhere in GDB, assume an artificial first
17143 argument is "this". */
17147 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17151 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17154 child_die
= child_die
->sibling
;
17161 static struct type
*
17162 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17164 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17165 const char *name
= NULL
;
17166 struct type
*this_type
, *target_type
;
17168 name
= dwarf2_full_name (NULL
, die
, cu
);
17169 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17170 TYPE_TARGET_STUB (this_type
) = 1;
17171 set_die_type (die
, this_type
, cu
);
17172 target_type
= die_type (die
, cu
);
17173 if (target_type
!= this_type
)
17174 TYPE_TARGET_TYPE (this_type
) = target_type
;
17177 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17178 spec and cause infinite loops in GDB. */
17179 complaint (_("Self-referential DW_TAG_typedef "
17180 "- DIE at %s [in module %s]"),
17181 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17182 TYPE_TARGET_TYPE (this_type
) = NULL
;
17186 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17187 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17188 Handle these by just returning the target type, rather than
17189 constructing an anonymous typedef type and trying to handle this
17191 set_die_type (die
, target_type
, cu
);
17192 return target_type
;
17197 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17198 (which may be different from NAME) to the architecture back-end to allow
17199 it to guess the correct format if necessary. */
17201 static struct type
*
17202 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17203 const char *name_hint
, enum bfd_endian byte_order
)
17205 struct gdbarch
*gdbarch
= objfile
->arch ();
17206 const struct floatformat
**format
;
17209 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17211 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17213 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17218 /* Allocate an integer type of size BITS and name NAME. */
17220 static struct type
*
17221 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17222 int bits
, int unsigned_p
, const char *name
)
17226 /* Versions of Intel's C Compiler generate an integer type called "void"
17227 instead of using DW_TAG_unspecified_type. This has been seen on
17228 at least versions 14, 17, and 18. */
17229 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17230 && strcmp (name
, "void") == 0)
17231 type
= objfile_type (objfile
)->builtin_void
;
17233 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17238 /* Initialise and return a floating point type of size BITS suitable for
17239 use as a component of a complex number. The NAME_HINT is passed through
17240 when initialising the floating point type and is the name of the complex
17243 As DWARF doesn't currently provide an explicit name for the components
17244 of a complex number, but it can be helpful to have these components
17245 named, we try to select a suitable name based on the size of the
17247 static struct type
*
17248 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17249 struct objfile
*objfile
,
17250 int bits
, const char *name_hint
,
17251 enum bfd_endian byte_order
)
17253 gdbarch
*gdbarch
= objfile
->arch ();
17254 struct type
*tt
= nullptr;
17256 /* Try to find a suitable floating point builtin type of size BITS.
17257 We're going to use the name of this type as the name for the complex
17258 target type that we are about to create. */
17259 switch (cu
->language
)
17261 case language_fortran
:
17265 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17268 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17270 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17272 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17280 tt
= builtin_type (gdbarch
)->builtin_float
;
17283 tt
= builtin_type (gdbarch
)->builtin_double
;
17285 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17287 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17293 /* If the type we found doesn't match the size we were looking for, then
17294 pretend we didn't find a type at all, the complex target type we
17295 create will then be nameless. */
17296 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17299 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
17300 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17303 /* Find a representation of a given base type and install
17304 it in the TYPE field of the die. */
17306 static struct type
*
17307 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17309 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17311 struct attribute
*attr
;
17312 int encoding
= 0, bits
= 0;
17316 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17317 if (attr
!= nullptr)
17318 encoding
= DW_UNSND (attr
);
17319 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17320 if (attr
!= nullptr)
17321 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17322 name
= dwarf2_name (die
, cu
);
17324 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17326 arch
= objfile
->arch ();
17327 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17329 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17332 int endianity
= DW_UNSND (attr
);
17337 byte_order
= BFD_ENDIAN_BIG
;
17339 case DW_END_little
:
17340 byte_order
= BFD_ENDIAN_LITTLE
;
17343 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17350 case DW_ATE_address
:
17351 /* Turn DW_ATE_address into a void * pointer. */
17352 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17353 type
= init_pointer_type (objfile
, bits
, name
, type
);
17355 case DW_ATE_boolean
:
17356 type
= init_boolean_type (objfile
, bits
, 1, name
);
17358 case DW_ATE_complex_float
:
17359 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17361 if (type
->code () == TYPE_CODE_ERROR
)
17363 if (name
== nullptr)
17365 struct obstack
*obstack
17366 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17367 name
= obconcat (obstack
, "_Complex ", type
->name (),
17370 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17373 type
= init_complex_type (name
, type
);
17375 case DW_ATE_decimal_float
:
17376 type
= init_decfloat_type (objfile
, bits
, name
);
17379 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17381 case DW_ATE_signed
:
17382 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17384 case DW_ATE_unsigned
:
17385 if (cu
->language
== language_fortran
17387 && startswith (name
, "character("))
17388 type
= init_character_type (objfile
, bits
, 1, name
);
17390 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17392 case DW_ATE_signed_char
:
17393 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17394 || cu
->language
== language_pascal
17395 || cu
->language
== language_fortran
)
17396 type
= init_character_type (objfile
, bits
, 0, name
);
17398 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17400 case DW_ATE_unsigned_char
:
17401 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17402 || cu
->language
== language_pascal
17403 || cu
->language
== language_fortran
17404 || cu
->language
== language_rust
)
17405 type
= init_character_type (objfile
, bits
, 1, name
);
17407 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17412 type
= builtin_type (arch
)->builtin_char16
;
17413 else if (bits
== 32)
17414 type
= builtin_type (arch
)->builtin_char32
;
17417 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17419 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17421 return set_die_type (die
, type
, cu
);
17426 complaint (_("unsupported DW_AT_encoding: '%s'"),
17427 dwarf_type_encoding_name (encoding
));
17428 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17432 if (name
&& strcmp (name
, "char") == 0)
17433 TYPE_NOSIGN (type
) = 1;
17435 maybe_set_alignment (cu
, die
, type
);
17437 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17439 return set_die_type (die
, type
, cu
);
17442 /* Parse dwarf attribute if it's a block, reference or constant and put the
17443 resulting value of the attribute into struct bound_prop.
17444 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17447 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17448 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17449 struct type
*default_type
)
17451 struct dwarf2_property_baton
*baton
;
17452 struct obstack
*obstack
17453 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17455 gdb_assert (default_type
!= NULL
);
17457 if (attr
== NULL
|| prop
== NULL
)
17460 if (attr
->form_is_block ())
17462 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17463 baton
->property_type
= default_type
;
17464 baton
->locexpr
.per_cu
= cu
->per_cu
;
17465 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17466 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17467 switch (attr
->name
)
17469 case DW_AT_string_length
:
17470 baton
->locexpr
.is_reference
= true;
17473 baton
->locexpr
.is_reference
= false;
17476 prop
->data
.baton
= baton
;
17477 prop
->kind
= PROP_LOCEXPR
;
17478 gdb_assert (prop
->data
.baton
!= NULL
);
17480 else if (attr
->form_is_ref ())
17482 struct dwarf2_cu
*target_cu
= cu
;
17483 struct die_info
*target_die
;
17484 struct attribute
*target_attr
;
17486 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17487 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17488 if (target_attr
== NULL
)
17489 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17491 if (target_attr
== NULL
)
17494 switch (target_attr
->name
)
17496 case DW_AT_location
:
17497 if (target_attr
->form_is_section_offset ())
17499 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17500 baton
->property_type
= die_type (target_die
, target_cu
);
17501 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17502 prop
->data
.baton
= baton
;
17503 prop
->kind
= PROP_LOCLIST
;
17504 gdb_assert (prop
->data
.baton
!= NULL
);
17506 else if (target_attr
->form_is_block ())
17508 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17509 baton
->property_type
= die_type (target_die
, target_cu
);
17510 baton
->locexpr
.per_cu
= cu
->per_cu
;
17511 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17512 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17513 baton
->locexpr
.is_reference
= true;
17514 prop
->data
.baton
= baton
;
17515 prop
->kind
= PROP_LOCEXPR
;
17516 gdb_assert (prop
->data
.baton
!= NULL
);
17520 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17521 "dynamic property");
17525 case DW_AT_data_member_location
:
17529 if (!handle_data_member_location (target_die
, target_cu
,
17533 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17534 baton
->property_type
= read_type_die (target_die
->parent
,
17536 baton
->offset_info
.offset
= offset
;
17537 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17538 prop
->data
.baton
= baton
;
17539 prop
->kind
= PROP_ADDR_OFFSET
;
17544 else if (attr
->form_is_constant ())
17546 prop
->data
.const_val
= attr
->constant_value (0);
17547 prop
->kind
= PROP_CONST
;
17551 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17552 dwarf2_name (die
, cu
));
17562 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17564 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17565 struct type
*int_type
;
17567 /* Helper macro to examine the various builtin types. */
17568 #define TRY_TYPE(F) \
17569 int_type = (unsigned_p \
17570 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17571 : objfile_type (objfile)->builtin_ ## F); \
17572 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17579 TRY_TYPE (long_long
);
17583 gdb_assert_not_reached ("unable to find suitable integer type");
17589 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17591 int addr_size
= this->addr_size ();
17592 return int_type (addr_size
, unsigned_p
);
17595 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17596 present (which is valid) then compute the default type based on the
17597 compilation units address size. */
17599 static struct type
*
17600 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17602 struct type
*index_type
= die_type (die
, cu
);
17604 /* Dwarf-2 specifications explicitly allows to create subrange types
17605 without specifying a base type.
17606 In that case, the base type must be set to the type of
17607 the lower bound, upper bound or count, in that order, if any of these
17608 three attributes references an object that has a type.
17609 If no base type is found, the Dwarf-2 specifications say that
17610 a signed integer type of size equal to the size of an address should
17612 For the following C code: `extern char gdb_int [];'
17613 GCC produces an empty range DIE.
17614 FIXME: muller/2010-05-28: Possible references to object for low bound,
17615 high bound or count are not yet handled by this code. */
17616 if (index_type
->code () == TYPE_CODE_VOID
)
17617 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17622 /* Read the given DW_AT_subrange DIE. */
17624 static struct type
*
17625 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17627 struct type
*base_type
, *orig_base_type
;
17628 struct type
*range_type
;
17629 struct attribute
*attr
;
17630 struct dynamic_prop low
, high
;
17631 int low_default_is_valid
;
17632 int high_bound_is_count
= 0;
17634 ULONGEST negative_mask
;
17636 orig_base_type
= read_subrange_index_type (die
, cu
);
17638 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17639 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17640 creating the range type, but we use the result of check_typedef
17641 when examining properties of the type. */
17642 base_type
= check_typedef (orig_base_type
);
17644 /* The die_type call above may have already set the type for this DIE. */
17645 range_type
= get_die_type (die
, cu
);
17649 low
.kind
= PROP_CONST
;
17650 high
.kind
= PROP_CONST
;
17651 high
.data
.const_val
= 0;
17653 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17654 omitting DW_AT_lower_bound. */
17655 switch (cu
->language
)
17658 case language_cplus
:
17659 low
.data
.const_val
= 0;
17660 low_default_is_valid
= 1;
17662 case language_fortran
:
17663 low
.data
.const_val
= 1;
17664 low_default_is_valid
= 1;
17667 case language_objc
:
17668 case language_rust
:
17669 low
.data
.const_val
= 0;
17670 low_default_is_valid
= (cu
->header
.version
>= 4);
17674 case language_pascal
:
17675 low
.data
.const_val
= 1;
17676 low_default_is_valid
= (cu
->header
.version
>= 4);
17679 low
.data
.const_val
= 0;
17680 low_default_is_valid
= 0;
17684 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17685 if (attr
!= nullptr)
17686 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17687 else if (!low_default_is_valid
)
17688 complaint (_("Missing DW_AT_lower_bound "
17689 "- DIE at %s [in module %s]"),
17690 sect_offset_str (die
->sect_off
),
17691 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17693 struct attribute
*attr_ub
, *attr_count
;
17694 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17695 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17697 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17698 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17700 /* If bounds are constant do the final calculation here. */
17701 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17702 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17704 high_bound_is_count
= 1;
17708 if (attr_ub
!= NULL
)
17709 complaint (_("Unresolved DW_AT_upper_bound "
17710 "- DIE at %s [in module %s]"),
17711 sect_offset_str (die
->sect_off
),
17712 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17713 if (attr_count
!= NULL
)
17714 complaint (_("Unresolved DW_AT_count "
17715 "- DIE at %s [in module %s]"),
17716 sect_offset_str (die
->sect_off
),
17717 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17722 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17723 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17724 bias
= bias_attr
->constant_value (0);
17726 /* Normally, the DWARF producers are expected to use a signed
17727 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17728 But this is unfortunately not always the case, as witnessed
17729 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17730 is used instead. To work around that ambiguity, we treat
17731 the bounds as signed, and thus sign-extend their values, when
17732 the base type is signed. */
17734 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17735 if (low
.kind
== PROP_CONST
17736 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17737 low
.data
.const_val
|= negative_mask
;
17738 if (high
.kind
== PROP_CONST
17739 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17740 high
.data
.const_val
|= negative_mask
;
17742 /* Check for bit and byte strides. */
17743 struct dynamic_prop byte_stride_prop
;
17744 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17745 if (attr_byte_stride
!= nullptr)
17747 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17748 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17752 struct dynamic_prop bit_stride_prop
;
17753 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17754 if (attr_bit_stride
!= nullptr)
17756 /* It only makes sense to have either a bit or byte stride. */
17757 if (attr_byte_stride
!= nullptr)
17759 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17760 "- DIE at %s [in module %s]"),
17761 sect_offset_str (die
->sect_off
),
17762 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17763 attr_bit_stride
= nullptr;
17767 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17768 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17773 if (attr_byte_stride
!= nullptr
17774 || attr_bit_stride
!= nullptr)
17776 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17777 struct dynamic_prop
*stride
17778 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17781 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17782 &high
, bias
, stride
, byte_stride_p
);
17785 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17787 if (high_bound_is_count
)
17788 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17790 /* Ada expects an empty array on no boundary attributes. */
17791 if (attr
== NULL
&& cu
->language
!= language_ada
)
17792 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17794 name
= dwarf2_name (die
, cu
);
17796 range_type
->set_name (name
);
17798 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17799 if (attr
!= nullptr)
17800 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17802 maybe_set_alignment (cu
, die
, range_type
);
17804 set_die_type (die
, range_type
, cu
);
17806 /* set_die_type should be already done. */
17807 set_descriptive_type (range_type
, die
, cu
);
17812 static struct type
*
17813 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17817 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17819 type
->set_name (dwarf2_name (die
, cu
));
17821 /* In Ada, an unspecified type is typically used when the description
17822 of the type is deferred to a different unit. When encountering
17823 such a type, we treat it as a stub, and try to resolve it later on,
17825 if (cu
->language
== language_ada
)
17826 TYPE_STUB (type
) = 1;
17828 return set_die_type (die
, type
, cu
);
17831 /* Read a single die and all its descendents. Set the die's sibling
17832 field to NULL; set other fields in the die correctly, and set all
17833 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17834 location of the info_ptr after reading all of those dies. PARENT
17835 is the parent of the die in question. */
17837 static struct die_info
*
17838 read_die_and_children (const struct die_reader_specs
*reader
,
17839 const gdb_byte
*info_ptr
,
17840 const gdb_byte
**new_info_ptr
,
17841 struct die_info
*parent
)
17843 struct die_info
*die
;
17844 const gdb_byte
*cur_ptr
;
17846 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17849 *new_info_ptr
= cur_ptr
;
17852 store_in_ref_table (die
, reader
->cu
);
17854 if (die
->has_children
)
17855 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17859 *new_info_ptr
= cur_ptr
;
17862 die
->sibling
= NULL
;
17863 die
->parent
= parent
;
17867 /* Read a die, all of its descendents, and all of its siblings; set
17868 all of the fields of all of the dies correctly. Arguments are as
17869 in read_die_and_children. */
17871 static struct die_info
*
17872 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17873 const gdb_byte
*info_ptr
,
17874 const gdb_byte
**new_info_ptr
,
17875 struct die_info
*parent
)
17877 struct die_info
*first_die
, *last_sibling
;
17878 const gdb_byte
*cur_ptr
;
17880 cur_ptr
= info_ptr
;
17881 first_die
= last_sibling
= NULL
;
17885 struct die_info
*die
17886 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17890 *new_info_ptr
= cur_ptr
;
17897 last_sibling
->sibling
= die
;
17899 last_sibling
= die
;
17903 /* Read a die, all of its descendents, and all of its siblings; set
17904 all of the fields of all of the dies correctly. Arguments are as
17905 in read_die_and_children.
17906 This the main entry point for reading a DIE and all its children. */
17908 static struct die_info
*
17909 read_die_and_siblings (const struct die_reader_specs
*reader
,
17910 const gdb_byte
*info_ptr
,
17911 const gdb_byte
**new_info_ptr
,
17912 struct die_info
*parent
)
17914 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17915 new_info_ptr
, parent
);
17917 if (dwarf_die_debug
)
17919 fprintf_unfiltered (gdb_stdlog
,
17920 "Read die from %s@0x%x of %s:\n",
17921 reader
->die_section
->get_name (),
17922 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17923 bfd_get_filename (reader
->abfd
));
17924 dump_die (die
, dwarf_die_debug
);
17930 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17932 The caller is responsible for filling in the extra attributes
17933 and updating (*DIEP)->num_attrs.
17934 Set DIEP to point to a newly allocated die with its information,
17935 except for its child, sibling, and parent fields. */
17937 static const gdb_byte
*
17938 read_full_die_1 (const struct die_reader_specs
*reader
,
17939 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17940 int num_extra_attrs
)
17942 unsigned int abbrev_number
, bytes_read
, i
;
17943 struct abbrev_info
*abbrev
;
17944 struct die_info
*die
;
17945 struct dwarf2_cu
*cu
= reader
->cu
;
17946 bfd
*abfd
= reader
->abfd
;
17948 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17949 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17950 info_ptr
+= bytes_read
;
17951 if (!abbrev_number
)
17957 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17959 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17961 bfd_get_filename (abfd
));
17963 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17964 die
->sect_off
= sect_off
;
17965 die
->tag
= abbrev
->tag
;
17966 die
->abbrev
= abbrev_number
;
17967 die
->has_children
= abbrev
->has_children
;
17969 /* Make the result usable.
17970 The caller needs to update num_attrs after adding the extra
17972 die
->num_attrs
= abbrev
->num_attrs
;
17974 std::vector
<int> indexes_that_need_reprocess
;
17975 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17977 bool need_reprocess
;
17979 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17980 info_ptr
, &need_reprocess
);
17981 if (need_reprocess
)
17982 indexes_that_need_reprocess
.push_back (i
);
17985 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17986 if (attr
!= nullptr)
17987 cu
->str_offsets_base
= DW_UNSND (attr
);
17989 attr
= die
->attr (DW_AT_loclists_base
);
17990 if (attr
!= nullptr)
17991 cu
->loclist_base
= DW_UNSND (attr
);
17993 auto maybe_addr_base
= die
->addr_base ();
17994 if (maybe_addr_base
.has_value ())
17995 cu
->addr_base
= *maybe_addr_base
;
17996 for (int index
: indexes_that_need_reprocess
)
17997 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
18002 /* Read a die and all its attributes.
18003 Set DIEP to point to a newly allocated die with its information,
18004 except for its child, sibling, and parent fields. */
18006 static const gdb_byte
*
18007 read_full_die (const struct die_reader_specs
*reader
,
18008 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18010 const gdb_byte
*result
;
18012 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18014 if (dwarf_die_debug
)
18016 fprintf_unfiltered (gdb_stdlog
,
18017 "Read die from %s@0x%x of %s:\n",
18018 reader
->die_section
->get_name (),
18019 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18020 bfd_get_filename (reader
->abfd
));
18021 dump_die (*diep
, dwarf_die_debug
);
18028 /* Returns nonzero if TAG represents a type that we might generate a partial
18032 is_type_tag_for_partial (int tag
)
18037 /* Some types that would be reasonable to generate partial symbols for,
18038 that we don't at present. */
18039 case DW_TAG_array_type
:
18040 case DW_TAG_file_type
:
18041 case DW_TAG_ptr_to_member_type
:
18042 case DW_TAG_set_type
:
18043 case DW_TAG_string_type
:
18044 case DW_TAG_subroutine_type
:
18046 case DW_TAG_base_type
:
18047 case DW_TAG_class_type
:
18048 case DW_TAG_interface_type
:
18049 case DW_TAG_enumeration_type
:
18050 case DW_TAG_structure_type
:
18051 case DW_TAG_subrange_type
:
18052 case DW_TAG_typedef
:
18053 case DW_TAG_union_type
:
18060 /* Load all DIEs that are interesting for partial symbols into memory. */
18062 static struct partial_die_info
*
18063 load_partial_dies (const struct die_reader_specs
*reader
,
18064 const gdb_byte
*info_ptr
, int building_psymtab
)
18066 struct dwarf2_cu
*cu
= reader
->cu
;
18067 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18068 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18069 unsigned int bytes_read
;
18070 unsigned int load_all
= 0;
18071 int nesting_level
= 1;
18076 gdb_assert (cu
->per_cu
!= NULL
);
18077 if (cu
->per_cu
->load_all_dies
)
18081 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18085 &cu
->comp_unit_obstack
,
18086 hashtab_obstack_allocate
,
18087 dummy_obstack_deallocate
);
18091 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18093 /* A NULL abbrev means the end of a series of children. */
18094 if (abbrev
== NULL
)
18096 if (--nesting_level
== 0)
18099 info_ptr
+= bytes_read
;
18100 last_die
= parent_die
;
18101 parent_die
= parent_die
->die_parent
;
18105 /* Check for template arguments. We never save these; if
18106 they're seen, we just mark the parent, and go on our way. */
18107 if (parent_die
!= NULL
18108 && cu
->language
== language_cplus
18109 && (abbrev
->tag
== DW_TAG_template_type_param
18110 || abbrev
->tag
== DW_TAG_template_value_param
))
18112 parent_die
->has_template_arguments
= 1;
18116 /* We don't need a partial DIE for the template argument. */
18117 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18122 /* We only recurse into c++ subprograms looking for template arguments.
18123 Skip their other children. */
18125 && cu
->language
== language_cplus
18126 && parent_die
!= NULL
18127 && parent_die
->tag
== DW_TAG_subprogram
)
18129 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18133 /* Check whether this DIE is interesting enough to save. Normally
18134 we would not be interested in members here, but there may be
18135 later variables referencing them via DW_AT_specification (for
18136 static members). */
18138 && !is_type_tag_for_partial (abbrev
->tag
)
18139 && abbrev
->tag
!= DW_TAG_constant
18140 && abbrev
->tag
!= DW_TAG_enumerator
18141 && abbrev
->tag
!= DW_TAG_subprogram
18142 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18143 && abbrev
->tag
!= DW_TAG_lexical_block
18144 && abbrev
->tag
!= DW_TAG_variable
18145 && abbrev
->tag
!= DW_TAG_namespace
18146 && abbrev
->tag
!= DW_TAG_module
18147 && abbrev
->tag
!= DW_TAG_member
18148 && abbrev
->tag
!= DW_TAG_imported_unit
18149 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18151 /* Otherwise we skip to the next sibling, if any. */
18152 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18156 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18159 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18161 /* This two-pass algorithm for processing partial symbols has a
18162 high cost in cache pressure. Thus, handle some simple cases
18163 here which cover the majority of C partial symbols. DIEs
18164 which neither have specification tags in them, nor could have
18165 specification tags elsewhere pointing at them, can simply be
18166 processed and discarded.
18168 This segment is also optional; scan_partial_symbols and
18169 add_partial_symbol will handle these DIEs if we chain
18170 them in normally. When compilers which do not emit large
18171 quantities of duplicate debug information are more common,
18172 this code can probably be removed. */
18174 /* Any complete simple types at the top level (pretty much all
18175 of them, for a language without namespaces), can be processed
18177 if (parent_die
== NULL
18178 && pdi
.has_specification
== 0
18179 && pdi
.is_declaration
== 0
18180 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18181 || pdi
.tag
== DW_TAG_base_type
18182 || pdi
.tag
== DW_TAG_subrange_type
))
18184 if (building_psymtab
&& pdi
.name
!= NULL
)
18185 add_psymbol_to_list (pdi
.name
, false,
18186 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18187 psymbol_placement::STATIC
,
18188 0, cu
->language
, objfile
);
18189 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18193 /* The exception for DW_TAG_typedef with has_children above is
18194 a workaround of GCC PR debug/47510. In the case of this complaint
18195 type_name_or_error will error on such types later.
18197 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18198 it could not find the child DIEs referenced later, this is checked
18199 above. In correct DWARF DW_TAG_typedef should have no children. */
18201 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18202 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18203 "- DIE at %s [in module %s]"),
18204 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18206 /* If we're at the second level, and we're an enumerator, and
18207 our parent has no specification (meaning possibly lives in a
18208 namespace elsewhere), then we can add the partial symbol now
18209 instead of queueing it. */
18210 if (pdi
.tag
== DW_TAG_enumerator
18211 && parent_die
!= NULL
18212 && parent_die
->die_parent
== NULL
18213 && parent_die
->tag
== DW_TAG_enumeration_type
18214 && parent_die
->has_specification
== 0)
18216 if (pdi
.name
== NULL
)
18217 complaint (_("malformed enumerator DIE ignored"));
18218 else if (building_psymtab
)
18219 add_psymbol_to_list (pdi
.name
, false,
18220 VAR_DOMAIN
, LOC_CONST
, -1,
18221 cu
->language
== language_cplus
18222 ? psymbol_placement::GLOBAL
18223 : psymbol_placement::STATIC
,
18224 0, cu
->language
, objfile
);
18226 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18230 struct partial_die_info
*part_die
18231 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18233 /* We'll save this DIE so link it in. */
18234 part_die
->die_parent
= parent_die
;
18235 part_die
->die_sibling
= NULL
;
18236 part_die
->die_child
= NULL
;
18238 if (last_die
&& last_die
== parent_die
)
18239 last_die
->die_child
= part_die
;
18241 last_die
->die_sibling
= part_die
;
18243 last_die
= part_die
;
18245 if (first_die
== NULL
)
18246 first_die
= part_die
;
18248 /* Maybe add the DIE to the hash table. Not all DIEs that we
18249 find interesting need to be in the hash table, because we
18250 also have the parent/sibling/child chains; only those that we
18251 might refer to by offset later during partial symbol reading.
18253 For now this means things that might have be the target of a
18254 DW_AT_specification, DW_AT_abstract_origin, or
18255 DW_AT_extension. DW_AT_extension will refer only to
18256 namespaces; DW_AT_abstract_origin refers to functions (and
18257 many things under the function DIE, but we do not recurse
18258 into function DIEs during partial symbol reading) and
18259 possibly variables as well; DW_AT_specification refers to
18260 declarations. Declarations ought to have the DW_AT_declaration
18261 flag. It happens that GCC forgets to put it in sometimes, but
18262 only for functions, not for types.
18264 Adding more things than necessary to the hash table is harmless
18265 except for the performance cost. Adding too few will result in
18266 wasted time in find_partial_die, when we reread the compilation
18267 unit with load_all_dies set. */
18270 || abbrev
->tag
== DW_TAG_constant
18271 || abbrev
->tag
== DW_TAG_subprogram
18272 || abbrev
->tag
== DW_TAG_variable
18273 || abbrev
->tag
== DW_TAG_namespace
18274 || part_die
->is_declaration
)
18278 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18279 to_underlying (part_die
->sect_off
),
18284 /* For some DIEs we want to follow their children (if any). For C
18285 we have no reason to follow the children of structures; for other
18286 languages we have to, so that we can get at method physnames
18287 to infer fully qualified class names, for DW_AT_specification,
18288 and for C++ template arguments. For C++, we also look one level
18289 inside functions to find template arguments (if the name of the
18290 function does not already contain the template arguments).
18292 For Ada and Fortran, we need to scan the children of subprograms
18293 and lexical blocks as well because these languages allow the
18294 definition of nested entities that could be interesting for the
18295 debugger, such as nested subprograms for instance. */
18296 if (last_die
->has_children
18298 || last_die
->tag
== DW_TAG_namespace
18299 || last_die
->tag
== DW_TAG_module
18300 || last_die
->tag
== DW_TAG_enumeration_type
18301 || (cu
->language
== language_cplus
18302 && last_die
->tag
== DW_TAG_subprogram
18303 && (last_die
->name
== NULL
18304 || strchr (last_die
->name
, '<') == NULL
))
18305 || (cu
->language
!= language_c
18306 && (last_die
->tag
== DW_TAG_class_type
18307 || last_die
->tag
== DW_TAG_interface_type
18308 || last_die
->tag
== DW_TAG_structure_type
18309 || last_die
->tag
== DW_TAG_union_type
))
18310 || ((cu
->language
== language_ada
18311 || cu
->language
== language_fortran
)
18312 && (last_die
->tag
== DW_TAG_subprogram
18313 || last_die
->tag
== DW_TAG_lexical_block
))))
18316 parent_die
= last_die
;
18320 /* Otherwise we skip to the next sibling, if any. */
18321 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18323 /* Back to the top, do it again. */
18327 partial_die_info::partial_die_info (sect_offset sect_off_
,
18328 struct abbrev_info
*abbrev
)
18329 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18333 /* Read a minimal amount of information into the minimal die structure.
18334 INFO_PTR should point just after the initial uleb128 of a DIE. */
18337 partial_die_info::read (const struct die_reader_specs
*reader
,
18338 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18340 struct dwarf2_cu
*cu
= reader
->cu
;
18341 struct dwarf2_per_objfile
*dwarf2_per_objfile
18342 = cu
->per_cu
->dwarf2_per_objfile
;
18344 int has_low_pc_attr
= 0;
18345 int has_high_pc_attr
= 0;
18346 int high_pc_relative
= 0;
18348 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18351 bool need_reprocess
;
18352 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18353 info_ptr
, &need_reprocess
);
18354 /* String and address offsets that need to do the reprocessing have
18355 already been read at this point, so there is no need to wait until
18356 the loop terminates to do the reprocessing. */
18357 if (need_reprocess
)
18358 read_attribute_reprocess (reader
, &attr
);
18359 /* Store the data if it is of an attribute we want to keep in a
18360 partial symbol table. */
18366 case DW_TAG_compile_unit
:
18367 case DW_TAG_partial_unit
:
18368 case DW_TAG_type_unit
:
18369 /* Compilation units have a DW_AT_name that is a filename, not
18370 a source language identifier. */
18371 case DW_TAG_enumeration_type
:
18372 case DW_TAG_enumerator
:
18373 /* These tags always have simple identifiers already; no need
18374 to canonicalize them. */
18375 name
= DW_STRING (&attr
);
18379 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18382 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18387 case DW_AT_linkage_name
:
18388 case DW_AT_MIPS_linkage_name
:
18389 /* Note that both forms of linkage name might appear. We
18390 assume they will be the same, and we only store the last
18392 linkage_name
= attr
.value_as_string ();
18393 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18394 See https://github.com/rust-lang/rust/issues/32925. */
18395 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18396 && strchr (linkage_name
, '{') != NULL
)
18397 linkage_name
= NULL
;
18400 has_low_pc_attr
= 1;
18401 lowpc
= attr
.value_as_address ();
18403 case DW_AT_high_pc
:
18404 has_high_pc_attr
= 1;
18405 highpc
= attr
.value_as_address ();
18406 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18407 high_pc_relative
= 1;
18409 case DW_AT_location
:
18410 /* Support the .debug_loc offsets. */
18411 if (attr
.form_is_block ())
18413 d
.locdesc
= DW_BLOCK (&attr
);
18415 else if (attr
.form_is_section_offset ())
18417 dwarf2_complex_location_expr_complaint ();
18421 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18422 "partial symbol information");
18425 case DW_AT_external
:
18426 is_external
= DW_UNSND (&attr
);
18428 case DW_AT_declaration
:
18429 is_declaration
= DW_UNSND (&attr
);
18434 case DW_AT_abstract_origin
:
18435 case DW_AT_specification
:
18436 case DW_AT_extension
:
18437 has_specification
= 1;
18438 spec_offset
= attr
.get_ref_die_offset ();
18439 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18440 || cu
->per_cu
->is_dwz
);
18442 case DW_AT_sibling
:
18443 /* Ignore absolute siblings, they might point outside of
18444 the current compile unit. */
18445 if (attr
.form
== DW_FORM_ref_addr
)
18446 complaint (_("ignoring absolute DW_AT_sibling"));
18449 const gdb_byte
*buffer
= reader
->buffer
;
18450 sect_offset off
= attr
.get_ref_die_offset ();
18451 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18453 if (sibling_ptr
< info_ptr
)
18454 complaint (_("DW_AT_sibling points backwards"));
18455 else if (sibling_ptr
> reader
->buffer_end
)
18456 reader
->die_section
->overflow_complaint ();
18458 sibling
= sibling_ptr
;
18461 case DW_AT_byte_size
:
18464 case DW_AT_const_value
:
18465 has_const_value
= 1;
18467 case DW_AT_calling_convention
:
18468 /* DWARF doesn't provide a way to identify a program's source-level
18469 entry point. DW_AT_calling_convention attributes are only meant
18470 to describe functions' calling conventions.
18472 However, because it's a necessary piece of information in
18473 Fortran, and before DWARF 4 DW_CC_program was the only
18474 piece of debugging information whose definition refers to
18475 a 'main program' at all, several compilers marked Fortran
18476 main programs with DW_CC_program --- even when those
18477 functions use the standard calling conventions.
18479 Although DWARF now specifies a way to provide this
18480 information, we support this practice for backward
18482 if (DW_UNSND (&attr
) == DW_CC_program
18483 && cu
->language
== language_fortran
)
18484 main_subprogram
= 1;
18487 if (DW_UNSND (&attr
) == DW_INL_inlined
18488 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18489 may_be_inlined
= 1;
18493 if (tag
== DW_TAG_imported_unit
)
18495 d
.sect_off
= attr
.get_ref_die_offset ();
18496 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18497 || cu
->per_cu
->is_dwz
);
18501 case DW_AT_main_subprogram
:
18502 main_subprogram
= DW_UNSND (&attr
);
18507 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18508 but that requires a full DIE, so instead we just
18510 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18511 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18512 + (need_ranges_base
18516 /* Value of the DW_AT_ranges attribute is the offset in the
18517 .debug_ranges section. */
18518 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18529 /* For Ada, if both the name and the linkage name appear, we prefer
18530 the latter. This lets "catch exception" work better, regardless
18531 of the order in which the name and linkage name were emitted.
18532 Really, though, this is just a workaround for the fact that gdb
18533 doesn't store both the name and the linkage name. */
18534 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18535 name
= linkage_name
;
18537 if (high_pc_relative
)
18540 if (has_low_pc_attr
&& has_high_pc_attr
)
18542 /* When using the GNU linker, .gnu.linkonce. sections are used to
18543 eliminate duplicate copies of functions and vtables and such.
18544 The linker will arbitrarily choose one and discard the others.
18545 The AT_*_pc values for such functions refer to local labels in
18546 these sections. If the section from that file was discarded, the
18547 labels are not in the output, so the relocs get a value of 0.
18548 If this is a discarded function, mark the pc bounds as invalid,
18549 so that GDB will ignore it. */
18550 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18552 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18553 struct gdbarch
*gdbarch
= objfile
->arch ();
18555 complaint (_("DW_AT_low_pc %s is zero "
18556 "for DIE at %s [in module %s]"),
18557 paddress (gdbarch
, lowpc
),
18558 sect_offset_str (sect_off
),
18559 objfile_name (objfile
));
18561 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18562 else if (lowpc
>= highpc
)
18564 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18565 struct gdbarch
*gdbarch
= objfile
->arch ();
18567 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18568 "for DIE at %s [in module %s]"),
18569 paddress (gdbarch
, lowpc
),
18570 paddress (gdbarch
, highpc
),
18571 sect_offset_str (sect_off
),
18572 objfile_name (objfile
));
18581 /* Find a cached partial DIE at OFFSET in CU. */
18583 struct partial_die_info
*
18584 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18586 struct partial_die_info
*lookup_die
= NULL
;
18587 struct partial_die_info
part_die (sect_off
);
18589 lookup_die
= ((struct partial_die_info
*)
18590 htab_find_with_hash (partial_dies
, &part_die
,
18591 to_underlying (sect_off
)));
18596 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18597 except in the case of .debug_types DIEs which do not reference
18598 outside their CU (they do however referencing other types via
18599 DW_FORM_ref_sig8). */
18601 static const struct cu_partial_die_info
18602 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18604 struct dwarf2_per_objfile
*dwarf2_per_objfile
18605 = cu
->per_cu
->dwarf2_per_objfile
;
18606 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18607 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18608 struct partial_die_info
*pd
= NULL
;
18610 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18611 && cu
->header
.offset_in_cu_p (sect_off
))
18613 pd
= cu
->find_partial_die (sect_off
);
18616 /* We missed recording what we needed.
18617 Load all dies and try again. */
18618 per_cu
= cu
->per_cu
;
18622 /* TUs don't reference other CUs/TUs (except via type signatures). */
18623 if (cu
->per_cu
->is_debug_types
)
18625 error (_("Dwarf Error: Type Unit at offset %s contains"
18626 " external reference to offset %s [in module %s].\n"),
18627 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18628 bfd_get_filename (objfile
->obfd
));
18630 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18631 dwarf2_per_objfile
);
18633 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18634 load_partial_comp_unit (per_cu
);
18636 per_cu
->cu
->last_used
= 0;
18637 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18640 /* If we didn't find it, and not all dies have been loaded,
18641 load them all and try again. */
18643 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18645 per_cu
->load_all_dies
= 1;
18647 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18648 THIS_CU->cu may already be in use. So we can't just free it and
18649 replace its DIEs with the ones we read in. Instead, we leave those
18650 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18651 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18653 load_partial_comp_unit (per_cu
);
18655 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18659 internal_error (__FILE__
, __LINE__
,
18660 _("could not find partial DIE %s "
18661 "in cache [from module %s]\n"),
18662 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18663 return { per_cu
->cu
, pd
};
18666 /* See if we can figure out if the class lives in a namespace. We do
18667 this by looking for a member function; its demangled name will
18668 contain namespace info, if there is any. */
18671 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18672 struct dwarf2_cu
*cu
)
18674 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18675 what template types look like, because the demangler
18676 frequently doesn't give the same name as the debug info. We
18677 could fix this by only using the demangled name to get the
18678 prefix (but see comment in read_structure_type). */
18680 struct partial_die_info
*real_pdi
;
18681 struct partial_die_info
*child_pdi
;
18683 /* If this DIE (this DIE's specification, if any) has a parent, then
18684 we should not do this. We'll prepend the parent's fully qualified
18685 name when we create the partial symbol. */
18687 real_pdi
= struct_pdi
;
18688 while (real_pdi
->has_specification
)
18690 auto res
= find_partial_die (real_pdi
->spec_offset
,
18691 real_pdi
->spec_is_dwz
, cu
);
18692 real_pdi
= res
.pdi
;
18696 if (real_pdi
->die_parent
!= NULL
)
18699 for (child_pdi
= struct_pdi
->die_child
;
18701 child_pdi
= child_pdi
->die_sibling
)
18703 if (child_pdi
->tag
== DW_TAG_subprogram
18704 && child_pdi
->linkage_name
!= NULL
)
18706 gdb::unique_xmalloc_ptr
<char> actual_class_name
18707 (language_class_name_from_physname (cu
->language_defn
,
18708 child_pdi
->linkage_name
));
18709 if (actual_class_name
!= NULL
)
18711 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18712 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18719 /* Return true if a DIE with TAG may have the DW_AT_const_value
18723 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18727 case DW_TAG_constant
:
18728 case DW_TAG_enumerator
:
18729 case DW_TAG_formal_parameter
:
18730 case DW_TAG_template_value_param
:
18731 case DW_TAG_variable
:
18739 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18741 /* Once we've fixed up a die, there's no point in doing so again.
18742 This also avoids a memory leak if we were to call
18743 guess_partial_die_structure_name multiple times. */
18747 /* If we found a reference attribute and the DIE has no name, try
18748 to find a name in the referred to DIE. */
18750 if (name
== NULL
&& has_specification
)
18752 struct partial_die_info
*spec_die
;
18754 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18755 spec_die
= res
.pdi
;
18758 spec_die
->fixup (cu
);
18760 if (spec_die
->name
)
18762 name
= spec_die
->name
;
18764 /* Copy DW_AT_external attribute if it is set. */
18765 if (spec_die
->is_external
)
18766 is_external
= spec_die
->is_external
;
18770 if (!has_const_value
&& has_specification
18771 && can_have_DW_AT_const_value_p (tag
))
18773 struct partial_die_info
*spec_die
;
18775 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18776 spec_die
= res
.pdi
;
18779 spec_die
->fixup (cu
);
18781 if (spec_die
->has_const_value
)
18783 /* Copy DW_AT_const_value attribute if it is set. */
18784 has_const_value
= spec_die
->has_const_value
;
18788 /* Set default names for some unnamed DIEs. */
18790 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18791 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18793 /* If there is no parent die to provide a namespace, and there are
18794 children, see if we can determine the namespace from their linkage
18796 if (cu
->language
== language_cplus
18797 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18798 && die_parent
== NULL
18800 && (tag
== DW_TAG_class_type
18801 || tag
== DW_TAG_structure_type
18802 || tag
== DW_TAG_union_type
))
18803 guess_partial_die_structure_name (this, cu
);
18805 /* GCC might emit a nameless struct or union that has a linkage
18806 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18808 && (tag
== DW_TAG_class_type
18809 || tag
== DW_TAG_interface_type
18810 || tag
== DW_TAG_structure_type
18811 || tag
== DW_TAG_union_type
)
18812 && linkage_name
!= NULL
)
18814 gdb::unique_xmalloc_ptr
<char> demangled
18815 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18816 if (demangled
!= nullptr)
18820 /* Strip any leading namespaces/classes, keep only the base name.
18821 DW_AT_name for named DIEs does not contain the prefixes. */
18822 base
= strrchr (demangled
.get (), ':');
18823 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18826 base
= demangled
.get ();
18828 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18829 name
= objfile
->intern (base
);
18836 /* Read the .debug_loclists header contents from the given SECTION in the
18839 read_loclist_header (struct loclist_header
*header
,
18840 struct dwarf2_section_info
*section
)
18842 unsigned int bytes_read
;
18843 bfd
*abfd
= section
->get_bfd_owner ();
18844 const gdb_byte
*info_ptr
= section
->buffer
;
18845 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18846 info_ptr
+= bytes_read
;
18847 header
->version
= read_2_bytes (abfd
, info_ptr
);
18849 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18851 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18853 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18856 /* Return the DW_AT_loclists_base value for the CU. */
18858 lookup_loclist_base (struct dwarf2_cu
*cu
)
18860 /* For the .dwo unit, the loclist_base points to the first offset following
18861 the header. The header consists of the following entities-
18862 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18864 2. version (2 bytes)
18865 3. address size (1 byte)
18866 4. segment selector size (1 byte)
18867 5. offset entry count (4 bytes)
18868 These sizes are derived as per the DWARFv5 standard. */
18869 if (cu
->dwo_unit
!= nullptr)
18871 if (cu
->header
.initial_length_size
== 4)
18872 return LOCLIST_HEADER_SIZE32
;
18873 return LOCLIST_HEADER_SIZE64
;
18875 return cu
->loclist_base
;
18878 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18879 array of offsets in the .debug_loclists section. */
18881 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18883 struct dwarf2_per_objfile
*dwarf2_per_objfile
18884 = cu
->per_cu
->dwarf2_per_objfile
;
18885 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18886 bfd
*abfd
= objfile
->obfd
;
18887 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18888 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18890 section
->read (objfile
);
18891 if (section
->buffer
== NULL
)
18892 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18893 "section [in module %s]"), objfile_name (objfile
));
18894 struct loclist_header header
;
18895 read_loclist_header (&header
, section
);
18896 if (loclist_index
>= header
.offset_entry_count
)
18897 complaint (_("DW_FORM_loclistx pointing outside of "
18898 ".debug_loclists offset array [in module %s]"),
18899 objfile_name (objfile
));
18900 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18902 complaint (_("DW_FORM_loclistx pointing outside of "
18903 ".debug_loclists section [in module %s]"),
18904 objfile_name (objfile
));
18905 const gdb_byte
*info_ptr
18906 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18908 if (cu
->header
.offset_size
== 4)
18909 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18911 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18914 /* Process the attributes that had to be skipped in the first round. These
18915 attributes are the ones that need str_offsets_base or addr_base attributes.
18916 They could not have been processed in the first round, because at the time
18917 the values of str_offsets_base or addr_base may not have been known. */
18919 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18920 struct attribute
*attr
)
18922 struct dwarf2_cu
*cu
= reader
->cu
;
18923 switch (attr
->form
)
18925 case DW_FORM_addrx
:
18926 case DW_FORM_GNU_addr_index
:
18927 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18929 case DW_FORM_loclistx
:
18930 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18933 case DW_FORM_strx1
:
18934 case DW_FORM_strx2
:
18935 case DW_FORM_strx3
:
18936 case DW_FORM_strx4
:
18937 case DW_FORM_GNU_str_index
:
18939 unsigned int str_index
= DW_UNSND (attr
);
18940 if (reader
->dwo_file
!= NULL
)
18942 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18943 DW_STRING_IS_CANONICAL (attr
) = 0;
18947 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18948 DW_STRING_IS_CANONICAL (attr
) = 0;
18953 gdb_assert_not_reached (_("Unexpected DWARF form."));
18957 /* Read an attribute value described by an attribute form. */
18959 static const gdb_byte
*
18960 read_attribute_value (const struct die_reader_specs
*reader
,
18961 struct attribute
*attr
, unsigned form
,
18962 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18963 bool *need_reprocess
)
18965 struct dwarf2_cu
*cu
= reader
->cu
;
18966 struct dwarf2_per_objfile
*dwarf2_per_objfile
18967 = cu
->per_cu
->dwarf2_per_objfile
;
18968 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18969 bfd
*abfd
= reader
->abfd
;
18970 struct comp_unit_head
*cu_header
= &cu
->header
;
18971 unsigned int bytes_read
;
18972 struct dwarf_block
*blk
;
18973 *need_reprocess
= false;
18975 attr
->form
= (enum dwarf_form
) form
;
18978 case DW_FORM_ref_addr
:
18979 if (cu
->header
.version
== 2)
18980 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18983 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18985 info_ptr
+= bytes_read
;
18987 case DW_FORM_GNU_ref_alt
:
18988 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18989 info_ptr
+= bytes_read
;
18993 struct gdbarch
*gdbarch
= objfile
->arch ();
18994 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18995 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18996 info_ptr
+= bytes_read
;
18999 case DW_FORM_block2
:
19000 blk
= dwarf_alloc_block (cu
);
19001 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19003 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19004 info_ptr
+= blk
->size
;
19005 DW_BLOCK (attr
) = blk
;
19007 case DW_FORM_block4
:
19008 blk
= dwarf_alloc_block (cu
);
19009 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19011 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19012 info_ptr
+= blk
->size
;
19013 DW_BLOCK (attr
) = blk
;
19015 case DW_FORM_data2
:
19016 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19019 case DW_FORM_data4
:
19020 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19023 case DW_FORM_data8
:
19024 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19027 case DW_FORM_data16
:
19028 blk
= dwarf_alloc_block (cu
);
19030 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19032 DW_BLOCK (attr
) = blk
;
19034 case DW_FORM_sec_offset
:
19035 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19036 info_ptr
+= bytes_read
;
19038 case DW_FORM_loclistx
:
19040 *need_reprocess
= true;
19041 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19042 info_ptr
+= bytes_read
;
19045 case DW_FORM_string
:
19046 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19047 DW_STRING_IS_CANONICAL (attr
) = 0;
19048 info_ptr
+= bytes_read
;
19051 if (!cu
->per_cu
->is_dwz
)
19053 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19054 abfd
, info_ptr
, cu_header
,
19056 DW_STRING_IS_CANONICAL (attr
) = 0;
19057 info_ptr
+= bytes_read
;
19061 case DW_FORM_line_strp
:
19062 if (!cu
->per_cu
->is_dwz
)
19065 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
19067 DW_STRING_IS_CANONICAL (attr
) = 0;
19068 info_ptr
+= bytes_read
;
19072 case DW_FORM_GNU_strp_alt
:
19074 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19075 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19078 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
19079 DW_STRING_IS_CANONICAL (attr
) = 0;
19080 info_ptr
+= bytes_read
;
19083 case DW_FORM_exprloc
:
19084 case DW_FORM_block
:
19085 blk
= dwarf_alloc_block (cu
);
19086 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19087 info_ptr
+= bytes_read
;
19088 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19089 info_ptr
+= blk
->size
;
19090 DW_BLOCK (attr
) = blk
;
19092 case DW_FORM_block1
:
19093 blk
= dwarf_alloc_block (cu
);
19094 blk
->size
= read_1_byte (abfd
, info_ptr
);
19096 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19097 info_ptr
+= blk
->size
;
19098 DW_BLOCK (attr
) = blk
;
19100 case DW_FORM_data1
:
19101 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19105 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19108 case DW_FORM_flag_present
:
19109 DW_UNSND (attr
) = 1;
19111 case DW_FORM_sdata
:
19112 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19113 info_ptr
+= bytes_read
;
19115 case DW_FORM_udata
:
19116 case DW_FORM_rnglistx
:
19117 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19118 info_ptr
+= bytes_read
;
19121 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19122 + read_1_byte (abfd
, info_ptr
));
19126 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19127 + read_2_bytes (abfd
, info_ptr
));
19131 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19132 + read_4_bytes (abfd
, info_ptr
));
19136 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19137 + read_8_bytes (abfd
, info_ptr
));
19140 case DW_FORM_ref_sig8
:
19141 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19144 case DW_FORM_ref_udata
:
19145 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19146 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19147 info_ptr
+= bytes_read
;
19149 case DW_FORM_indirect
:
19150 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19151 info_ptr
+= bytes_read
;
19152 if (form
== DW_FORM_implicit_const
)
19154 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19155 info_ptr
+= bytes_read
;
19157 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19158 info_ptr
, need_reprocess
);
19160 case DW_FORM_implicit_const
:
19161 DW_SND (attr
) = implicit_const
;
19163 case DW_FORM_addrx
:
19164 case DW_FORM_GNU_addr_index
:
19165 *need_reprocess
= true;
19166 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19167 info_ptr
+= bytes_read
;
19170 case DW_FORM_strx1
:
19171 case DW_FORM_strx2
:
19172 case DW_FORM_strx3
:
19173 case DW_FORM_strx4
:
19174 case DW_FORM_GNU_str_index
:
19176 ULONGEST str_index
;
19177 if (form
== DW_FORM_strx1
)
19179 str_index
= read_1_byte (abfd
, info_ptr
);
19182 else if (form
== DW_FORM_strx2
)
19184 str_index
= read_2_bytes (abfd
, info_ptr
);
19187 else if (form
== DW_FORM_strx3
)
19189 str_index
= read_3_bytes (abfd
, info_ptr
);
19192 else if (form
== DW_FORM_strx4
)
19194 str_index
= read_4_bytes (abfd
, info_ptr
);
19199 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19200 info_ptr
+= bytes_read
;
19202 *need_reprocess
= true;
19203 DW_UNSND (attr
) = str_index
;
19207 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19208 dwarf_form_name (form
),
19209 bfd_get_filename (abfd
));
19213 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19214 attr
->form
= DW_FORM_GNU_ref_alt
;
19216 /* We have seen instances where the compiler tried to emit a byte
19217 size attribute of -1 which ended up being encoded as an unsigned
19218 0xffffffff. Although 0xffffffff is technically a valid size value,
19219 an object of this size seems pretty unlikely so we can relatively
19220 safely treat these cases as if the size attribute was invalid and
19221 treat them as zero by default. */
19222 if (attr
->name
== DW_AT_byte_size
19223 && form
== DW_FORM_data4
19224 && DW_UNSND (attr
) >= 0xffffffff)
19227 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19228 hex_string (DW_UNSND (attr
)));
19229 DW_UNSND (attr
) = 0;
19235 /* Read an attribute described by an abbreviated attribute. */
19237 static const gdb_byte
*
19238 read_attribute (const struct die_reader_specs
*reader
,
19239 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19240 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19242 attr
->name
= abbrev
->name
;
19243 return read_attribute_value (reader
, attr
, abbrev
->form
,
19244 abbrev
->implicit_const
, info_ptr
,
19248 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19250 static const char *
19251 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19252 LONGEST str_offset
)
19254 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
19255 str_offset
, "DW_FORM_strp");
19258 /* Return pointer to string at .debug_str offset as read from BUF.
19259 BUF is assumed to be in a compilation unit described by CU_HEADER.
19260 Return *BYTES_READ_PTR count of bytes read from BUF. */
19262 static const char *
19263 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19264 const gdb_byte
*buf
,
19265 const struct comp_unit_head
*cu_header
,
19266 unsigned int *bytes_read_ptr
)
19268 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19270 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19276 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19277 const struct comp_unit_head
*cu_header
,
19278 unsigned int *bytes_read_ptr
)
19280 bfd
*abfd
= objfile
->obfd
;
19281 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19283 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19286 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19287 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19288 ADDR_SIZE is the size of addresses from the CU header. */
19291 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19292 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19295 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19296 bfd
*abfd
= objfile
->obfd
;
19297 const gdb_byte
*info_ptr
;
19298 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19300 dwarf2_per_objfile
->addr
.read (objfile
);
19301 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19302 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19303 objfile_name (objfile
));
19304 if (addr_base_or_zero
+ addr_index
* addr_size
19305 >= dwarf2_per_objfile
->addr
.size
)
19306 error (_("DW_FORM_addr_index pointing outside of "
19307 ".debug_addr section [in module %s]"),
19308 objfile_name (objfile
));
19309 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19310 + addr_base_or_zero
+ addr_index
* addr_size
);
19311 if (addr_size
== 4)
19312 return bfd_get_32 (abfd
, info_ptr
);
19314 return bfd_get_64 (abfd
, info_ptr
);
19317 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19320 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19322 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19323 cu
->addr_base
, cu
->header
.addr_size
);
19326 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19329 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19330 unsigned int *bytes_read
)
19332 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19333 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19335 return read_addr_index (cu
, addr_index
);
19341 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19343 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19344 struct dwarf2_cu
*cu
= per_cu
->cu
;
19345 gdb::optional
<ULONGEST
> addr_base
;
19348 /* We need addr_base and addr_size.
19349 If we don't have PER_CU->cu, we have to get it.
19350 Nasty, but the alternative is storing the needed info in PER_CU,
19351 which at this point doesn't seem justified: it's not clear how frequently
19352 it would get used and it would increase the size of every PER_CU.
19353 Entry points like dwarf2_per_cu_addr_size do a similar thing
19354 so we're not in uncharted territory here.
19355 Alas we need to be a bit more complicated as addr_base is contained
19358 We don't need to read the entire CU(/TU).
19359 We just need the header and top level die.
19361 IWBN to use the aging mechanism to let us lazily later discard the CU.
19362 For now we skip this optimization. */
19366 addr_base
= cu
->addr_base
;
19367 addr_size
= cu
->header
.addr_size
;
19371 cutu_reader
reader (per_cu
, NULL
, 0, false);
19372 addr_base
= reader
.cu
->addr_base
;
19373 addr_size
= reader
.cu
->header
.addr_size
;
19376 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19380 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19381 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19384 static const char *
19385 read_str_index (struct dwarf2_cu
*cu
,
19386 struct dwarf2_section_info
*str_section
,
19387 struct dwarf2_section_info
*str_offsets_section
,
19388 ULONGEST str_offsets_base
, ULONGEST str_index
)
19390 struct dwarf2_per_objfile
*dwarf2_per_objfile
19391 = cu
->per_cu
->dwarf2_per_objfile
;
19392 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19393 const char *objf_name
= objfile_name (objfile
);
19394 bfd
*abfd
= objfile
->obfd
;
19395 const gdb_byte
*info_ptr
;
19396 ULONGEST str_offset
;
19397 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19399 str_section
->read (objfile
);
19400 str_offsets_section
->read (objfile
);
19401 if (str_section
->buffer
== NULL
)
19402 error (_("%s used without %s section"
19403 " in CU at offset %s [in module %s]"),
19404 form_name
, str_section
->get_name (),
19405 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19406 if (str_offsets_section
->buffer
== NULL
)
19407 error (_("%s used without %s section"
19408 " in CU at offset %s [in module %s]"),
19409 form_name
, str_section
->get_name (),
19410 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19411 info_ptr
= (str_offsets_section
->buffer
19413 + str_index
* cu
->header
.offset_size
);
19414 if (cu
->header
.offset_size
== 4)
19415 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19417 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19418 if (str_offset
>= str_section
->size
)
19419 error (_("Offset from %s pointing outside of"
19420 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19421 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19422 return (const char *) (str_section
->buffer
+ str_offset
);
19425 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19427 static const char *
19428 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19430 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19431 ? reader
->cu
->header
.addr_size
: 0;
19432 return read_str_index (reader
->cu
,
19433 &reader
->dwo_file
->sections
.str
,
19434 &reader
->dwo_file
->sections
.str_offsets
,
19435 str_offsets_base
, str_index
);
19438 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19440 static const char *
19441 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19443 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19444 const char *objf_name
= objfile_name (objfile
);
19445 static const char form_name
[] = "DW_FORM_GNU_str_index";
19446 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19448 if (!cu
->str_offsets_base
.has_value ())
19449 error (_("%s used in Fission stub without %s"
19450 " in CU at offset 0x%lx [in module %s]"),
19451 form_name
, str_offsets_attr_name
,
19452 (long) cu
->header
.offset_size
, objf_name
);
19454 return read_str_index (cu
,
19455 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19456 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19457 *cu
->str_offsets_base
, str_index
);
19460 /* Return the length of an LEB128 number in BUF. */
19463 leb128_size (const gdb_byte
*buf
)
19465 const gdb_byte
*begin
= buf
;
19471 if ((byte
& 128) == 0)
19472 return buf
- begin
;
19477 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19486 cu
->language
= language_c
;
19489 case DW_LANG_C_plus_plus
:
19490 case DW_LANG_C_plus_plus_11
:
19491 case DW_LANG_C_plus_plus_14
:
19492 cu
->language
= language_cplus
;
19495 cu
->language
= language_d
;
19497 case DW_LANG_Fortran77
:
19498 case DW_LANG_Fortran90
:
19499 case DW_LANG_Fortran95
:
19500 case DW_LANG_Fortran03
:
19501 case DW_LANG_Fortran08
:
19502 cu
->language
= language_fortran
;
19505 cu
->language
= language_go
;
19507 case DW_LANG_Mips_Assembler
:
19508 cu
->language
= language_asm
;
19510 case DW_LANG_Ada83
:
19511 case DW_LANG_Ada95
:
19512 cu
->language
= language_ada
;
19514 case DW_LANG_Modula2
:
19515 cu
->language
= language_m2
;
19517 case DW_LANG_Pascal83
:
19518 cu
->language
= language_pascal
;
19521 cu
->language
= language_objc
;
19524 case DW_LANG_Rust_old
:
19525 cu
->language
= language_rust
;
19527 case DW_LANG_Cobol74
:
19528 case DW_LANG_Cobol85
:
19530 cu
->language
= language_minimal
;
19533 cu
->language_defn
= language_def (cu
->language
);
19536 /* Return the named attribute or NULL if not there. */
19538 static struct attribute
*
19539 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19544 struct attribute
*spec
= NULL
;
19546 for (i
= 0; i
< die
->num_attrs
; ++i
)
19548 if (die
->attrs
[i
].name
== name
)
19549 return &die
->attrs
[i
];
19550 if (die
->attrs
[i
].name
== DW_AT_specification
19551 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19552 spec
= &die
->attrs
[i
];
19558 die
= follow_die_ref (die
, spec
, &cu
);
19564 /* Return the string associated with a string-typed attribute, or NULL if it
19565 is either not found or is of an incorrect type. */
19567 static const char *
19568 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19570 struct attribute
*attr
;
19571 const char *str
= NULL
;
19573 attr
= dwarf2_attr (die
, name
, cu
);
19577 str
= attr
->value_as_string ();
19578 if (str
== nullptr)
19579 complaint (_("string type expected for attribute %s for "
19580 "DIE at %s in module %s"),
19581 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19582 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19588 /* Return the dwo name or NULL if not present. If present, it is in either
19589 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19590 static const char *
19591 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19593 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19594 if (dwo_name
== nullptr)
19595 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19599 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19600 and holds a non-zero value. This function should only be used for
19601 DW_FORM_flag or DW_FORM_flag_present attributes. */
19604 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19606 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19608 return (attr
&& DW_UNSND (attr
));
19612 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19614 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19615 which value is non-zero. However, we have to be careful with
19616 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19617 (via dwarf2_flag_true_p) follows this attribute. So we may
19618 end up accidently finding a declaration attribute that belongs
19619 to a different DIE referenced by the specification attribute,
19620 even though the given DIE does not have a declaration attribute. */
19621 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19622 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19625 /* Return the die giving the specification for DIE, if there is
19626 one. *SPEC_CU is the CU containing DIE on input, and the CU
19627 containing the return value on output. If there is no
19628 specification, but there is an abstract origin, that is
19631 static struct die_info
*
19632 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19634 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19637 if (spec_attr
== NULL
)
19638 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19640 if (spec_attr
== NULL
)
19643 return follow_die_ref (die
, spec_attr
, spec_cu
);
19646 /* Stub for free_line_header to match void * callback types. */
19649 free_line_header_voidp (void *arg
)
19651 struct line_header
*lh
= (struct line_header
*) arg
;
19656 /* A convenience function to find the proper .debug_line section for a CU. */
19658 static struct dwarf2_section_info
*
19659 get_debug_line_section (struct dwarf2_cu
*cu
)
19661 struct dwarf2_section_info
*section
;
19662 struct dwarf2_per_objfile
*dwarf2_per_objfile
19663 = cu
->per_cu
->dwarf2_per_objfile
;
19665 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19667 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19668 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19669 else if (cu
->per_cu
->is_dwz
)
19671 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19673 section
= &dwz
->line
;
19676 section
= &dwarf2_per_objfile
->line
;
19681 /* Read the statement program header starting at OFFSET in
19682 .debug_line, or .debug_line.dwo. Return a pointer
19683 to a struct line_header, allocated using xmalloc.
19684 Returns NULL if there is a problem reading the header, e.g., if it
19685 has a version we don't understand.
19687 NOTE: the strings in the include directory and file name tables of
19688 the returned object point into the dwarf line section buffer,
19689 and must not be freed. */
19691 static line_header_up
19692 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19694 struct dwarf2_section_info
*section
;
19695 struct dwarf2_per_objfile
*dwarf2_per_objfile
19696 = cu
->per_cu
->dwarf2_per_objfile
;
19698 section
= get_debug_line_section (cu
);
19699 section
->read (dwarf2_per_objfile
->objfile
);
19700 if (section
->buffer
== NULL
)
19702 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19703 complaint (_("missing .debug_line.dwo section"));
19705 complaint (_("missing .debug_line section"));
19709 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19710 dwarf2_per_objfile
, section
,
19714 /* Subroutine of dwarf_decode_lines to simplify it.
19715 Return the file name of the psymtab for the given file_entry.
19716 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19717 If space for the result is malloc'd, *NAME_HOLDER will be set.
19718 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19720 static const char *
19721 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19722 const dwarf2_psymtab
*pst
,
19723 const char *comp_dir
,
19724 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19726 const char *include_name
= fe
.name
;
19727 const char *include_name_to_compare
= include_name
;
19728 const char *pst_filename
;
19731 const char *dir_name
= fe
.include_dir (lh
);
19733 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19734 if (!IS_ABSOLUTE_PATH (include_name
)
19735 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19737 /* Avoid creating a duplicate psymtab for PST.
19738 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19739 Before we do the comparison, however, we need to account
19740 for DIR_NAME and COMP_DIR.
19741 First prepend dir_name (if non-NULL). If we still don't
19742 have an absolute path prepend comp_dir (if non-NULL).
19743 However, the directory we record in the include-file's
19744 psymtab does not contain COMP_DIR (to match the
19745 corresponding symtab(s)).
19750 bash$ gcc -g ./hello.c
19751 include_name = "hello.c"
19753 DW_AT_comp_dir = comp_dir = "/tmp"
19754 DW_AT_name = "./hello.c"
19758 if (dir_name
!= NULL
)
19760 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19761 include_name
, (char *) NULL
));
19762 include_name
= name_holder
->get ();
19763 include_name_to_compare
= include_name
;
19765 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19767 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19768 include_name
, (char *) NULL
));
19769 include_name_to_compare
= hold_compare
.get ();
19773 pst_filename
= pst
->filename
;
19774 gdb::unique_xmalloc_ptr
<char> copied_name
;
19775 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19777 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19778 pst_filename
, (char *) NULL
));
19779 pst_filename
= copied_name
.get ();
19782 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19786 return include_name
;
19789 /* State machine to track the state of the line number program. */
19791 class lnp_state_machine
19794 /* Initialize a machine state for the start of a line number
19796 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19797 bool record_lines_p
);
19799 file_entry
*current_file ()
19801 /* lh->file_names is 0-based, but the file name numbers in the
19802 statement program are 1-based. */
19803 return m_line_header
->file_name_at (m_file
);
19806 /* Record the line in the state machine. END_SEQUENCE is true if
19807 we're processing the end of a sequence. */
19808 void record_line (bool end_sequence
);
19810 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19811 nop-out rest of the lines in this sequence. */
19812 void check_line_address (struct dwarf2_cu
*cu
,
19813 const gdb_byte
*line_ptr
,
19814 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19816 void handle_set_discriminator (unsigned int discriminator
)
19818 m_discriminator
= discriminator
;
19819 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19822 /* Handle DW_LNE_set_address. */
19823 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19826 address
+= baseaddr
;
19827 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19830 /* Handle DW_LNS_advance_pc. */
19831 void handle_advance_pc (CORE_ADDR adjust
);
19833 /* Handle a special opcode. */
19834 void handle_special_opcode (unsigned char op_code
);
19836 /* Handle DW_LNS_advance_line. */
19837 void handle_advance_line (int line_delta
)
19839 advance_line (line_delta
);
19842 /* Handle DW_LNS_set_file. */
19843 void handle_set_file (file_name_index file
);
19845 /* Handle DW_LNS_negate_stmt. */
19846 void handle_negate_stmt ()
19848 m_is_stmt
= !m_is_stmt
;
19851 /* Handle DW_LNS_const_add_pc. */
19852 void handle_const_add_pc ();
19854 /* Handle DW_LNS_fixed_advance_pc. */
19855 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19857 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19861 /* Handle DW_LNS_copy. */
19862 void handle_copy ()
19864 record_line (false);
19865 m_discriminator
= 0;
19868 /* Handle DW_LNE_end_sequence. */
19869 void handle_end_sequence ()
19871 m_currently_recording_lines
= true;
19875 /* Advance the line by LINE_DELTA. */
19876 void advance_line (int line_delta
)
19878 m_line
+= line_delta
;
19880 if (line_delta
!= 0)
19881 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19884 struct dwarf2_cu
*m_cu
;
19886 gdbarch
*m_gdbarch
;
19888 /* True if we're recording lines.
19889 Otherwise we're building partial symtabs and are just interested in
19890 finding include files mentioned by the line number program. */
19891 bool m_record_lines_p
;
19893 /* The line number header. */
19894 line_header
*m_line_header
;
19896 /* These are part of the standard DWARF line number state machine,
19897 and initialized according to the DWARF spec. */
19899 unsigned char m_op_index
= 0;
19900 /* The line table index of the current file. */
19901 file_name_index m_file
= 1;
19902 unsigned int m_line
= 1;
19904 /* These are initialized in the constructor. */
19906 CORE_ADDR m_address
;
19908 unsigned int m_discriminator
;
19910 /* Additional bits of state we need to track. */
19912 /* The last file that we called dwarf2_start_subfile for.
19913 This is only used for TLLs. */
19914 unsigned int m_last_file
= 0;
19915 /* The last file a line number was recorded for. */
19916 struct subfile
*m_last_subfile
= NULL
;
19918 /* When true, record the lines we decode. */
19919 bool m_currently_recording_lines
= false;
19921 /* The last line number that was recorded, used to coalesce
19922 consecutive entries for the same line. This can happen, for
19923 example, when discriminators are present. PR 17276. */
19924 unsigned int m_last_line
= 0;
19925 bool m_line_has_non_zero_discriminator
= false;
19929 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19931 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19932 / m_line_header
->maximum_ops_per_instruction
)
19933 * m_line_header
->minimum_instruction_length
);
19934 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19935 m_op_index
= ((m_op_index
+ adjust
)
19936 % m_line_header
->maximum_ops_per_instruction
);
19940 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19942 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19943 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19944 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19945 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19946 / m_line_header
->maximum_ops_per_instruction
)
19947 * m_line_header
->minimum_instruction_length
);
19948 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19949 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19950 % m_line_header
->maximum_ops_per_instruction
);
19952 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19953 advance_line (line_delta
);
19954 record_line (false);
19955 m_discriminator
= 0;
19959 lnp_state_machine::handle_set_file (file_name_index file
)
19963 const file_entry
*fe
= current_file ();
19965 dwarf2_debug_line_missing_file_complaint ();
19966 else if (m_record_lines_p
)
19968 const char *dir
= fe
->include_dir (m_line_header
);
19970 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19971 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19972 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19977 lnp_state_machine::handle_const_add_pc ()
19980 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19983 = (((m_op_index
+ adjust
)
19984 / m_line_header
->maximum_ops_per_instruction
)
19985 * m_line_header
->minimum_instruction_length
);
19987 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19988 m_op_index
= ((m_op_index
+ adjust
)
19989 % m_line_header
->maximum_ops_per_instruction
);
19992 /* Return non-zero if we should add LINE to the line number table.
19993 LINE is the line to add, LAST_LINE is the last line that was added,
19994 LAST_SUBFILE is the subfile for LAST_LINE.
19995 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19996 had a non-zero discriminator.
19998 We have to be careful in the presence of discriminators.
19999 E.g., for this line:
20001 for (i = 0; i < 100000; i++);
20003 clang can emit four line number entries for that one line,
20004 each with a different discriminator.
20005 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20007 However, we want gdb to coalesce all four entries into one.
20008 Otherwise the user could stepi into the middle of the line and
20009 gdb would get confused about whether the pc really was in the
20010 middle of the line.
20012 Things are further complicated by the fact that two consecutive
20013 line number entries for the same line is a heuristic used by gcc
20014 to denote the end of the prologue. So we can't just discard duplicate
20015 entries, we have to be selective about it. The heuristic we use is
20016 that we only collapse consecutive entries for the same line if at least
20017 one of those entries has a non-zero discriminator. PR 17276.
20019 Note: Addresses in the line number state machine can never go backwards
20020 within one sequence, thus this coalescing is ok. */
20023 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20024 unsigned int line
, unsigned int last_line
,
20025 int line_has_non_zero_discriminator
,
20026 struct subfile
*last_subfile
)
20028 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20030 if (line
!= last_line
)
20032 /* Same line for the same file that we've seen already.
20033 As a last check, for pr 17276, only record the line if the line
20034 has never had a non-zero discriminator. */
20035 if (!line_has_non_zero_discriminator
)
20040 /* Use the CU's builder to record line number LINE beginning at
20041 address ADDRESS in the line table of subfile SUBFILE. */
20044 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20045 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20046 struct dwarf2_cu
*cu
)
20048 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20050 if (dwarf_line_debug
)
20052 fprintf_unfiltered (gdb_stdlog
,
20053 "Recording line %u, file %s, address %s\n",
20054 line
, lbasename (subfile
->name
),
20055 paddress (gdbarch
, address
));
20059 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20062 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20063 Mark the end of a set of line number records.
20064 The arguments are the same as for dwarf_record_line_1.
20065 If SUBFILE is NULL the request is ignored. */
20068 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20069 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20071 if (subfile
== NULL
)
20074 if (dwarf_line_debug
)
20076 fprintf_unfiltered (gdb_stdlog
,
20077 "Finishing current line, file %s, address %s\n",
20078 lbasename (subfile
->name
),
20079 paddress (gdbarch
, address
));
20082 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20086 lnp_state_machine::record_line (bool end_sequence
)
20088 if (dwarf_line_debug
)
20090 fprintf_unfiltered (gdb_stdlog
,
20091 "Processing actual line %u: file %u,"
20092 " address %s, is_stmt %u, discrim %u%s\n",
20094 paddress (m_gdbarch
, m_address
),
20095 m_is_stmt
, m_discriminator
,
20096 (end_sequence
? "\t(end sequence)" : ""));
20099 file_entry
*fe
= current_file ();
20102 dwarf2_debug_line_missing_file_complaint ();
20103 /* For now we ignore lines not starting on an instruction boundary.
20104 But not when processing end_sequence for compatibility with the
20105 previous version of the code. */
20106 else if (m_op_index
== 0 || end_sequence
)
20108 fe
->included_p
= 1;
20109 if (m_record_lines_p
)
20111 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20114 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20115 m_currently_recording_lines
? m_cu
: nullptr);
20120 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20122 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20123 m_line_has_non_zero_discriminator
,
20126 buildsym_compunit
*builder
= m_cu
->get_builder ();
20127 dwarf_record_line_1 (m_gdbarch
,
20128 builder
->get_current_subfile (),
20129 m_line
, m_address
, is_stmt
,
20130 m_currently_recording_lines
? m_cu
: nullptr);
20132 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20133 m_last_line
= m_line
;
20139 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20140 line_header
*lh
, bool record_lines_p
)
20144 m_record_lines_p
= record_lines_p
;
20145 m_line_header
= lh
;
20147 m_currently_recording_lines
= true;
20149 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20150 was a line entry for it so that the backend has a chance to adjust it
20151 and also record it in case it needs it. This is currently used by MIPS
20152 code, cf. `mips_adjust_dwarf2_line'. */
20153 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20154 m_is_stmt
= lh
->default_is_stmt
;
20155 m_discriminator
= 0;
20159 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20160 const gdb_byte
*line_ptr
,
20161 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20163 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20164 the pc range of the CU. However, we restrict the test to only ADDRESS
20165 values of zero to preserve GDB's previous behaviour which is to handle
20166 the specific case of a function being GC'd by the linker. */
20168 if (address
== 0 && address
< unrelocated_lowpc
)
20170 /* This line table is for a function which has been
20171 GCd by the linker. Ignore it. PR gdb/12528 */
20173 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20174 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20176 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20177 line_offset
, objfile_name (objfile
));
20178 m_currently_recording_lines
= false;
20179 /* Note: m_currently_recording_lines is left as false until we see
20180 DW_LNE_end_sequence. */
20184 /* Subroutine of dwarf_decode_lines to simplify it.
20185 Process the line number information in LH.
20186 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20187 program in order to set included_p for every referenced header. */
20190 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20191 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20193 const gdb_byte
*line_ptr
, *extended_end
;
20194 const gdb_byte
*line_end
;
20195 unsigned int bytes_read
, extended_len
;
20196 unsigned char op_code
, extended_op
;
20197 CORE_ADDR baseaddr
;
20198 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20199 bfd
*abfd
= objfile
->obfd
;
20200 struct gdbarch
*gdbarch
= objfile
->arch ();
20201 /* True if we're recording line info (as opposed to building partial
20202 symtabs and just interested in finding include files mentioned by
20203 the line number program). */
20204 bool record_lines_p
= !decode_for_pst_p
;
20206 baseaddr
= objfile
->text_section_offset ();
20208 line_ptr
= lh
->statement_program_start
;
20209 line_end
= lh
->statement_program_end
;
20211 /* Read the statement sequences until there's nothing left. */
20212 while (line_ptr
< line_end
)
20214 /* The DWARF line number program state machine. Reset the state
20215 machine at the start of each sequence. */
20216 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20217 bool end_sequence
= false;
20219 if (record_lines_p
)
20221 /* Start a subfile for the current file of the state
20223 const file_entry
*fe
= state_machine
.current_file ();
20226 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20229 /* Decode the table. */
20230 while (line_ptr
< line_end
&& !end_sequence
)
20232 op_code
= read_1_byte (abfd
, line_ptr
);
20235 if (op_code
>= lh
->opcode_base
)
20237 /* Special opcode. */
20238 state_machine
.handle_special_opcode (op_code
);
20240 else switch (op_code
)
20242 case DW_LNS_extended_op
:
20243 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20245 line_ptr
+= bytes_read
;
20246 extended_end
= line_ptr
+ extended_len
;
20247 extended_op
= read_1_byte (abfd
, line_ptr
);
20249 switch (extended_op
)
20251 case DW_LNE_end_sequence
:
20252 state_machine
.handle_end_sequence ();
20253 end_sequence
= true;
20255 case DW_LNE_set_address
:
20258 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20259 line_ptr
+= bytes_read
;
20261 state_machine
.check_line_address (cu
, line_ptr
,
20262 lowpc
- baseaddr
, address
);
20263 state_machine
.handle_set_address (baseaddr
, address
);
20266 case DW_LNE_define_file
:
20268 const char *cur_file
;
20269 unsigned int mod_time
, length
;
20272 cur_file
= read_direct_string (abfd
, line_ptr
,
20274 line_ptr
+= bytes_read
;
20275 dindex
= (dir_index
)
20276 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20277 line_ptr
+= bytes_read
;
20279 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20280 line_ptr
+= bytes_read
;
20282 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20283 line_ptr
+= bytes_read
;
20284 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20287 case DW_LNE_set_discriminator
:
20289 /* The discriminator is not interesting to the
20290 debugger; just ignore it. We still need to
20291 check its value though:
20292 if there are consecutive entries for the same
20293 (non-prologue) line we want to coalesce them.
20296 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20297 line_ptr
+= bytes_read
;
20299 state_machine
.handle_set_discriminator (discr
);
20303 complaint (_("mangled .debug_line section"));
20306 /* Make sure that we parsed the extended op correctly. If e.g.
20307 we expected a different address size than the producer used,
20308 we may have read the wrong number of bytes. */
20309 if (line_ptr
!= extended_end
)
20311 complaint (_("mangled .debug_line section"));
20316 state_machine
.handle_copy ();
20318 case DW_LNS_advance_pc
:
20321 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20322 line_ptr
+= bytes_read
;
20324 state_machine
.handle_advance_pc (adjust
);
20327 case DW_LNS_advance_line
:
20330 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20331 line_ptr
+= bytes_read
;
20333 state_machine
.handle_advance_line (line_delta
);
20336 case DW_LNS_set_file
:
20338 file_name_index file
20339 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20341 line_ptr
+= bytes_read
;
20343 state_machine
.handle_set_file (file
);
20346 case DW_LNS_set_column
:
20347 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20348 line_ptr
+= bytes_read
;
20350 case DW_LNS_negate_stmt
:
20351 state_machine
.handle_negate_stmt ();
20353 case DW_LNS_set_basic_block
:
20355 /* Add to the address register of the state machine the
20356 address increment value corresponding to special opcode
20357 255. I.e., this value is scaled by the minimum
20358 instruction length since special opcode 255 would have
20359 scaled the increment. */
20360 case DW_LNS_const_add_pc
:
20361 state_machine
.handle_const_add_pc ();
20363 case DW_LNS_fixed_advance_pc
:
20365 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20368 state_machine
.handle_fixed_advance_pc (addr_adj
);
20373 /* Unknown standard opcode, ignore it. */
20376 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20378 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20379 line_ptr
+= bytes_read
;
20386 dwarf2_debug_line_missing_end_sequence_complaint ();
20388 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20389 in which case we still finish recording the last line). */
20390 state_machine
.record_line (true);
20394 /* Decode the Line Number Program (LNP) for the given line_header
20395 structure and CU. The actual information extracted and the type
20396 of structures created from the LNP depends on the value of PST.
20398 1. If PST is NULL, then this procedure uses the data from the program
20399 to create all necessary symbol tables, and their linetables.
20401 2. If PST is not NULL, this procedure reads the program to determine
20402 the list of files included by the unit represented by PST, and
20403 builds all the associated partial symbol tables.
20405 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20406 It is used for relative paths in the line table.
20407 NOTE: When processing partial symtabs (pst != NULL),
20408 comp_dir == pst->dirname.
20410 NOTE: It is important that psymtabs have the same file name (via strcmp)
20411 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20412 symtab we don't use it in the name of the psymtabs we create.
20413 E.g. expand_line_sal requires this when finding psymtabs to expand.
20414 A good testcase for this is mb-inline.exp.
20416 LOWPC is the lowest address in CU (or 0 if not known).
20418 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20419 for its PC<->lines mapping information. Otherwise only the filename
20420 table is read in. */
20423 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20424 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20425 CORE_ADDR lowpc
, int decode_mapping
)
20427 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20428 const int decode_for_pst_p
= (pst
!= NULL
);
20430 if (decode_mapping
)
20431 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20433 if (decode_for_pst_p
)
20435 /* Now that we're done scanning the Line Header Program, we can
20436 create the psymtab of each included file. */
20437 for (auto &file_entry
: lh
->file_names ())
20438 if (file_entry
.included_p
== 1)
20440 gdb::unique_xmalloc_ptr
<char> name_holder
;
20441 const char *include_name
=
20442 psymtab_include_file_name (lh
, file_entry
, pst
,
20443 comp_dir
, &name_holder
);
20444 if (include_name
!= NULL
)
20445 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20450 /* Make sure a symtab is created for every file, even files
20451 which contain only variables (i.e. no code with associated
20453 buildsym_compunit
*builder
= cu
->get_builder ();
20454 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20456 for (auto &fe
: lh
->file_names ())
20458 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20459 if (builder
->get_current_subfile ()->symtab
== NULL
)
20461 builder
->get_current_subfile ()->symtab
20462 = allocate_symtab (cust
,
20463 builder
->get_current_subfile ()->name
);
20465 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20470 /* Start a subfile for DWARF. FILENAME is the name of the file and
20471 DIRNAME the name of the source directory which contains FILENAME
20472 or NULL if not known.
20473 This routine tries to keep line numbers from identical absolute and
20474 relative file names in a common subfile.
20476 Using the `list' example from the GDB testsuite, which resides in
20477 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20478 of /srcdir/list0.c yields the following debugging information for list0.c:
20480 DW_AT_name: /srcdir/list0.c
20481 DW_AT_comp_dir: /compdir
20482 files.files[0].name: list0.h
20483 files.files[0].dir: /srcdir
20484 files.files[1].name: list0.c
20485 files.files[1].dir: /srcdir
20487 The line number information for list0.c has to end up in a single
20488 subfile, so that `break /srcdir/list0.c:1' works as expected.
20489 start_subfile will ensure that this happens provided that we pass the
20490 concatenation of files.files[1].dir and files.files[1].name as the
20494 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20495 const char *dirname
)
20497 gdb::unique_xmalloc_ptr
<char> copy
;
20499 /* In order not to lose the line information directory,
20500 we concatenate it to the filename when it makes sense.
20501 Note that the Dwarf3 standard says (speaking of filenames in line
20502 information): ``The directory index is ignored for file names
20503 that represent full path names''. Thus ignoring dirname in the
20504 `else' branch below isn't an issue. */
20506 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20508 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20509 filename
= copy
.get ();
20512 cu
->get_builder ()->start_subfile (filename
);
20515 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20516 buildsym_compunit constructor. */
20518 struct compunit_symtab
*
20519 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20522 gdb_assert (m_builder
== nullptr);
20524 m_builder
.reset (new struct buildsym_compunit
20525 (per_cu
->dwarf2_per_objfile
->objfile
,
20526 name
, comp_dir
, language
, low_pc
));
20528 list_in_scope
= get_builder ()->get_file_symbols ();
20530 get_builder ()->record_debugformat ("DWARF 2");
20531 get_builder ()->record_producer (producer
);
20533 processing_has_namespace_info
= false;
20535 return get_builder ()->get_compunit_symtab ();
20539 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20540 struct dwarf2_cu
*cu
)
20542 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20543 struct comp_unit_head
*cu_header
= &cu
->header
;
20545 /* NOTE drow/2003-01-30: There used to be a comment and some special
20546 code here to turn a symbol with DW_AT_external and a
20547 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20548 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20549 with some versions of binutils) where shared libraries could have
20550 relocations against symbols in their debug information - the
20551 minimal symbol would have the right address, but the debug info
20552 would not. It's no longer necessary, because we will explicitly
20553 apply relocations when we read in the debug information now. */
20555 /* A DW_AT_location attribute with no contents indicates that a
20556 variable has been optimized away. */
20557 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20559 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20563 /* Handle one degenerate form of location expression specially, to
20564 preserve GDB's previous behavior when section offsets are
20565 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20566 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20568 if (attr
->form_is_block ()
20569 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20570 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20571 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20572 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20573 && (DW_BLOCK (attr
)->size
20574 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20576 unsigned int dummy
;
20578 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20579 SET_SYMBOL_VALUE_ADDRESS
20580 (sym
, cu
->header
.read_address (objfile
->obfd
,
20581 DW_BLOCK (attr
)->data
+ 1,
20584 SET_SYMBOL_VALUE_ADDRESS
20585 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20587 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20588 fixup_symbol_section (sym
, objfile
);
20589 SET_SYMBOL_VALUE_ADDRESS
20591 SYMBOL_VALUE_ADDRESS (sym
)
20592 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20596 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20597 expression evaluator, and use LOC_COMPUTED only when necessary
20598 (i.e. when the value of a register or memory location is
20599 referenced, or a thread-local block, etc.). Then again, it might
20600 not be worthwhile. I'm assuming that it isn't unless performance
20601 or memory numbers show me otherwise. */
20603 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20605 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20606 cu
->has_loclist
= true;
20609 /* Given a pointer to a DWARF information entry, figure out if we need
20610 to make a symbol table entry for it, and if so, create a new entry
20611 and return a pointer to it.
20612 If TYPE is NULL, determine symbol type from the die, otherwise
20613 used the passed type.
20614 If SPACE is not NULL, use it to hold the new symbol. If it is
20615 NULL, allocate a new symbol on the objfile's obstack. */
20617 static struct symbol
*
20618 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20619 struct symbol
*space
)
20621 struct dwarf2_per_objfile
*dwarf2_per_objfile
20622 = cu
->per_cu
->dwarf2_per_objfile
;
20623 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20624 struct gdbarch
*gdbarch
= objfile
->arch ();
20625 struct symbol
*sym
= NULL
;
20627 struct attribute
*attr
= NULL
;
20628 struct attribute
*attr2
= NULL
;
20629 CORE_ADDR baseaddr
;
20630 struct pending
**list_to_add
= NULL
;
20632 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20634 baseaddr
= objfile
->text_section_offset ();
20636 name
= dwarf2_name (die
, cu
);
20639 int suppress_add
= 0;
20644 sym
= new (&objfile
->objfile_obstack
) symbol
;
20645 OBJSTAT (objfile
, n_syms
++);
20647 /* Cache this symbol's name and the name's demangled form (if any). */
20648 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20649 /* Fortran does not have mangling standard and the mangling does differ
20650 between gfortran, iFort etc. */
20651 const char *physname
20652 = (cu
->language
== language_fortran
20653 ? dwarf2_full_name (name
, die
, cu
)
20654 : dwarf2_physname (name
, die
, cu
));
20655 const char *linkagename
= dw2_linkage_name (die
, cu
);
20657 if (linkagename
== nullptr || cu
->language
== language_ada
)
20658 sym
->set_linkage_name (physname
);
20661 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20662 sym
->set_linkage_name (linkagename
);
20665 /* Default assumptions.
20666 Use the passed type or decode it from the die. */
20667 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20668 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20670 SYMBOL_TYPE (sym
) = type
;
20672 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20673 attr
= dwarf2_attr (die
,
20674 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20676 if (attr
!= nullptr)
20678 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20681 attr
= dwarf2_attr (die
,
20682 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20684 if (attr
!= nullptr)
20686 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20687 struct file_entry
*fe
;
20689 if (cu
->line_header
!= NULL
)
20690 fe
= cu
->line_header
->file_name_at (file_index
);
20695 complaint (_("file index out of range"));
20697 symbol_set_symtab (sym
, fe
->symtab
);
20703 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20704 if (attr
!= nullptr)
20708 addr
= attr
->value_as_address ();
20709 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20710 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20712 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20713 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20714 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20715 add_symbol_to_list (sym
, cu
->list_in_scope
);
20717 case DW_TAG_subprogram
:
20718 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20720 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20721 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20722 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20723 || cu
->language
== language_ada
20724 || cu
->language
== language_fortran
)
20726 /* Subprograms marked external are stored as a global symbol.
20727 Ada and Fortran subprograms, whether marked external or
20728 not, are always stored as a global symbol, because we want
20729 to be able to access them globally. For instance, we want
20730 to be able to break on a nested subprogram without having
20731 to specify the context. */
20732 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20736 list_to_add
= cu
->list_in_scope
;
20739 case DW_TAG_inlined_subroutine
:
20740 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20742 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20743 SYMBOL_INLINED (sym
) = 1;
20744 list_to_add
= cu
->list_in_scope
;
20746 case DW_TAG_template_value_param
:
20748 /* Fall through. */
20749 case DW_TAG_constant
:
20750 case DW_TAG_variable
:
20751 case DW_TAG_member
:
20752 /* Compilation with minimal debug info may result in
20753 variables with missing type entries. Change the
20754 misleading `void' type to something sensible. */
20755 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
20756 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20758 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20759 /* In the case of DW_TAG_member, we should only be called for
20760 static const members. */
20761 if (die
->tag
== DW_TAG_member
)
20763 /* dwarf2_add_field uses die_is_declaration,
20764 so we do the same. */
20765 gdb_assert (die_is_declaration (die
, cu
));
20768 if (attr
!= nullptr)
20770 dwarf2_const_value (attr
, sym
, cu
);
20771 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20774 if (attr2
&& (DW_UNSND (attr2
) != 0))
20775 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20777 list_to_add
= cu
->list_in_scope
;
20781 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20782 if (attr
!= nullptr)
20784 var_decode_location (attr
, sym
, cu
);
20785 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20787 /* Fortran explicitly imports any global symbols to the local
20788 scope by DW_TAG_common_block. */
20789 if (cu
->language
== language_fortran
&& die
->parent
20790 && die
->parent
->tag
== DW_TAG_common_block
)
20793 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20794 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20795 && !dwarf2_per_objfile
->has_section_at_zero
)
20797 /* When a static variable is eliminated by the linker,
20798 the corresponding debug information is not stripped
20799 out, but the variable address is set to null;
20800 do not add such variables into symbol table. */
20802 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20804 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20805 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20806 && dwarf2_per_objfile
->can_copy
)
20808 /* A global static variable might be subject to
20809 copy relocation. We first check for a local
20810 minsym, though, because maybe the symbol was
20811 marked hidden, in which case this would not
20813 bound_minimal_symbol found
20814 = (lookup_minimal_symbol_linkage
20815 (sym
->linkage_name (), objfile
));
20816 if (found
.minsym
!= nullptr)
20817 sym
->maybe_copied
= 1;
20820 /* A variable with DW_AT_external is never static,
20821 but it may be block-scoped. */
20823 = ((cu
->list_in_scope
20824 == cu
->get_builder ()->get_file_symbols ())
20825 ? cu
->get_builder ()->get_global_symbols ()
20826 : cu
->list_in_scope
);
20829 list_to_add
= cu
->list_in_scope
;
20833 /* We do not know the address of this symbol.
20834 If it is an external symbol and we have type information
20835 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20836 The address of the variable will then be determined from
20837 the minimal symbol table whenever the variable is
20839 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20841 /* Fortran explicitly imports any global symbols to the local
20842 scope by DW_TAG_common_block. */
20843 if (cu
->language
== language_fortran
&& die
->parent
20844 && die
->parent
->tag
== DW_TAG_common_block
)
20846 /* SYMBOL_CLASS doesn't matter here because
20847 read_common_block is going to reset it. */
20849 list_to_add
= cu
->list_in_scope
;
20851 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20852 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20854 /* A variable with DW_AT_external is never static, but it
20855 may be block-scoped. */
20857 = ((cu
->list_in_scope
20858 == cu
->get_builder ()->get_file_symbols ())
20859 ? cu
->get_builder ()->get_global_symbols ()
20860 : cu
->list_in_scope
);
20862 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20864 else if (!die_is_declaration (die
, cu
))
20866 /* Use the default LOC_OPTIMIZED_OUT class. */
20867 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20869 list_to_add
= cu
->list_in_scope
;
20873 case DW_TAG_formal_parameter
:
20875 /* If we are inside a function, mark this as an argument. If
20876 not, we might be looking at an argument to an inlined function
20877 when we do not have enough information to show inlined frames;
20878 pretend it's a local variable in that case so that the user can
20880 struct context_stack
*curr
20881 = cu
->get_builder ()->get_current_context_stack ();
20882 if (curr
!= nullptr && curr
->name
!= nullptr)
20883 SYMBOL_IS_ARGUMENT (sym
) = 1;
20884 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20885 if (attr
!= nullptr)
20887 var_decode_location (attr
, sym
, cu
);
20889 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20890 if (attr
!= nullptr)
20892 dwarf2_const_value (attr
, sym
, cu
);
20895 list_to_add
= cu
->list_in_scope
;
20898 case DW_TAG_unspecified_parameters
:
20899 /* From varargs functions; gdb doesn't seem to have any
20900 interest in this information, so just ignore it for now.
20903 case DW_TAG_template_type_param
:
20905 /* Fall through. */
20906 case DW_TAG_class_type
:
20907 case DW_TAG_interface_type
:
20908 case DW_TAG_structure_type
:
20909 case DW_TAG_union_type
:
20910 case DW_TAG_set_type
:
20911 case DW_TAG_enumeration_type
:
20912 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20913 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20916 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20917 really ever be static objects: otherwise, if you try
20918 to, say, break of a class's method and you're in a file
20919 which doesn't mention that class, it won't work unless
20920 the check for all static symbols in lookup_symbol_aux
20921 saves you. See the OtherFileClass tests in
20922 gdb.c++/namespace.exp. */
20926 buildsym_compunit
*builder
= cu
->get_builder ();
20928 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20929 && cu
->language
== language_cplus
20930 ? builder
->get_global_symbols ()
20931 : cu
->list_in_scope
);
20933 /* The semantics of C++ state that "struct foo {
20934 ... }" also defines a typedef for "foo". */
20935 if (cu
->language
== language_cplus
20936 || cu
->language
== language_ada
20937 || cu
->language
== language_d
20938 || cu
->language
== language_rust
)
20940 /* The symbol's name is already allocated along
20941 with this objfile, so we don't need to
20942 duplicate it for the type. */
20943 if (SYMBOL_TYPE (sym
)->name () == 0)
20944 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
20949 case DW_TAG_typedef
:
20950 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20951 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20952 list_to_add
= cu
->list_in_scope
;
20954 case DW_TAG_base_type
:
20955 case DW_TAG_subrange_type
:
20956 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20957 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20958 list_to_add
= cu
->list_in_scope
;
20960 case DW_TAG_enumerator
:
20961 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20962 if (attr
!= nullptr)
20964 dwarf2_const_value (attr
, sym
, cu
);
20967 /* NOTE: carlton/2003-11-10: See comment above in the
20968 DW_TAG_class_type, etc. block. */
20971 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20972 && cu
->language
== language_cplus
20973 ? cu
->get_builder ()->get_global_symbols ()
20974 : cu
->list_in_scope
);
20977 case DW_TAG_imported_declaration
:
20978 case DW_TAG_namespace
:
20979 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20980 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20982 case DW_TAG_module
:
20983 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20984 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20985 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20987 case DW_TAG_common_block
:
20988 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20989 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20990 add_symbol_to_list (sym
, cu
->list_in_scope
);
20993 /* Not a tag we recognize. Hopefully we aren't processing
20994 trash data, but since we must specifically ignore things
20995 we don't recognize, there is nothing else we should do at
20997 complaint (_("unsupported tag: '%s'"),
20998 dwarf_tag_name (die
->tag
));
21004 sym
->hash_next
= objfile
->template_symbols
;
21005 objfile
->template_symbols
= sym
;
21006 list_to_add
= NULL
;
21009 if (list_to_add
!= NULL
)
21010 add_symbol_to_list (sym
, list_to_add
);
21012 /* For the benefit of old versions of GCC, check for anonymous
21013 namespaces based on the demangled name. */
21014 if (!cu
->processing_has_namespace_info
21015 && cu
->language
== language_cplus
)
21016 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21021 /* Given an attr with a DW_FORM_dataN value in host byte order,
21022 zero-extend it as appropriate for the symbol's type. The DWARF
21023 standard (v4) is not entirely clear about the meaning of using
21024 DW_FORM_dataN for a constant with a signed type, where the type is
21025 wider than the data. The conclusion of a discussion on the DWARF
21026 list was that this is unspecified. We choose to always zero-extend
21027 because that is the interpretation long in use by GCC. */
21030 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21031 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21033 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21034 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21035 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21036 LONGEST l
= DW_UNSND (attr
);
21038 if (bits
< sizeof (*value
) * 8)
21040 l
&= ((LONGEST
) 1 << bits
) - 1;
21043 else if (bits
== sizeof (*value
) * 8)
21047 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21048 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21055 /* Read a constant value from an attribute. Either set *VALUE, or if
21056 the value does not fit in *VALUE, set *BYTES - either already
21057 allocated on the objfile obstack, or newly allocated on OBSTACK,
21058 or, set *BATON, if we translated the constant to a location
21062 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21063 const char *name
, struct obstack
*obstack
,
21064 struct dwarf2_cu
*cu
,
21065 LONGEST
*value
, const gdb_byte
**bytes
,
21066 struct dwarf2_locexpr_baton
**baton
)
21068 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21069 struct comp_unit_head
*cu_header
= &cu
->header
;
21070 struct dwarf_block
*blk
;
21071 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21072 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21078 switch (attr
->form
)
21081 case DW_FORM_addrx
:
21082 case DW_FORM_GNU_addr_index
:
21086 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21087 dwarf2_const_value_length_mismatch_complaint (name
,
21088 cu_header
->addr_size
,
21089 TYPE_LENGTH (type
));
21090 /* Symbols of this form are reasonably rare, so we just
21091 piggyback on the existing location code rather than writing
21092 a new implementation of symbol_computed_ops. */
21093 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21094 (*baton
)->per_cu
= cu
->per_cu
;
21095 gdb_assert ((*baton
)->per_cu
);
21097 (*baton
)->size
= 2 + cu_header
->addr_size
;
21098 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21099 (*baton
)->data
= data
;
21101 data
[0] = DW_OP_addr
;
21102 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21103 byte_order
, DW_ADDR (attr
));
21104 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21107 case DW_FORM_string
:
21110 case DW_FORM_GNU_str_index
:
21111 case DW_FORM_GNU_strp_alt
:
21112 /* DW_STRING is already allocated on the objfile obstack, point
21114 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21116 case DW_FORM_block1
:
21117 case DW_FORM_block2
:
21118 case DW_FORM_block4
:
21119 case DW_FORM_block
:
21120 case DW_FORM_exprloc
:
21121 case DW_FORM_data16
:
21122 blk
= DW_BLOCK (attr
);
21123 if (TYPE_LENGTH (type
) != blk
->size
)
21124 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21125 TYPE_LENGTH (type
));
21126 *bytes
= blk
->data
;
21129 /* The DW_AT_const_value attributes are supposed to carry the
21130 symbol's value "represented as it would be on the target
21131 architecture." By the time we get here, it's already been
21132 converted to host endianness, so we just need to sign- or
21133 zero-extend it as appropriate. */
21134 case DW_FORM_data1
:
21135 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21137 case DW_FORM_data2
:
21138 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21140 case DW_FORM_data4
:
21141 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21143 case DW_FORM_data8
:
21144 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21147 case DW_FORM_sdata
:
21148 case DW_FORM_implicit_const
:
21149 *value
= DW_SND (attr
);
21152 case DW_FORM_udata
:
21153 *value
= DW_UNSND (attr
);
21157 complaint (_("unsupported const value attribute form: '%s'"),
21158 dwarf_form_name (attr
->form
));
21165 /* Copy constant value from an attribute to a symbol. */
21168 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21169 struct dwarf2_cu
*cu
)
21171 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21173 const gdb_byte
*bytes
;
21174 struct dwarf2_locexpr_baton
*baton
;
21176 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21177 sym
->print_name (),
21178 &objfile
->objfile_obstack
, cu
,
21179 &value
, &bytes
, &baton
);
21183 SYMBOL_LOCATION_BATON (sym
) = baton
;
21184 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21186 else if (bytes
!= NULL
)
21188 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21189 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21193 SYMBOL_VALUE (sym
) = value
;
21194 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21198 /* Return the type of the die in question using its DW_AT_type attribute. */
21200 static struct type
*
21201 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21203 struct attribute
*type_attr
;
21205 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21208 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21209 /* A missing DW_AT_type represents a void type. */
21210 return objfile_type (objfile
)->builtin_void
;
21213 return lookup_die_type (die
, type_attr
, cu
);
21216 /* True iff CU's producer generates GNAT Ada auxiliary information
21217 that allows to find parallel types through that information instead
21218 of having to do expensive parallel lookups by type name. */
21221 need_gnat_info (struct dwarf2_cu
*cu
)
21223 /* Assume that the Ada compiler was GNAT, which always produces
21224 the auxiliary information. */
21225 return (cu
->language
== language_ada
);
21228 /* Return the auxiliary type of the die in question using its
21229 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21230 attribute is not present. */
21232 static struct type
*
21233 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21235 struct attribute
*type_attr
;
21237 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21241 return lookup_die_type (die
, type_attr
, cu
);
21244 /* If DIE has a descriptive_type attribute, then set the TYPE's
21245 descriptive type accordingly. */
21248 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21249 struct dwarf2_cu
*cu
)
21251 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21253 if (descriptive_type
)
21255 ALLOCATE_GNAT_AUX_TYPE (type
);
21256 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21260 /* Return the containing type of the die in question using its
21261 DW_AT_containing_type attribute. */
21263 static struct type
*
21264 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21266 struct attribute
*type_attr
;
21267 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21269 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21271 error (_("Dwarf Error: Problem turning containing type into gdb type "
21272 "[in module %s]"), objfile_name (objfile
));
21274 return lookup_die_type (die
, type_attr
, cu
);
21277 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21279 static struct type
*
21280 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21282 struct dwarf2_per_objfile
*dwarf2_per_objfile
21283 = cu
->per_cu
->dwarf2_per_objfile
;
21284 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21287 std::string message
21288 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21289 objfile_name (objfile
),
21290 sect_offset_str (cu
->header
.sect_off
),
21291 sect_offset_str (die
->sect_off
));
21292 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21294 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21297 /* Look up the type of DIE in CU using its type attribute ATTR.
21298 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21299 DW_AT_containing_type.
21300 If there is no type substitute an error marker. */
21302 static struct type
*
21303 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21304 struct dwarf2_cu
*cu
)
21306 struct dwarf2_per_objfile
*dwarf2_per_objfile
21307 = cu
->per_cu
->dwarf2_per_objfile
;
21308 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21309 struct type
*this_type
;
21311 gdb_assert (attr
->name
== DW_AT_type
21312 || attr
->name
== DW_AT_GNAT_descriptive_type
21313 || attr
->name
== DW_AT_containing_type
);
21315 /* First see if we have it cached. */
21317 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21319 struct dwarf2_per_cu_data
*per_cu
;
21320 sect_offset sect_off
= attr
->get_ref_die_offset ();
21322 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21323 dwarf2_per_objfile
);
21324 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21326 else if (attr
->form_is_ref ())
21328 sect_offset sect_off
= attr
->get_ref_die_offset ();
21330 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21332 else if (attr
->form
== DW_FORM_ref_sig8
)
21334 ULONGEST signature
= DW_SIGNATURE (attr
);
21336 return get_signatured_type (die
, signature
, cu
);
21340 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21341 " at %s [in module %s]"),
21342 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21343 objfile_name (objfile
));
21344 return build_error_marker_type (cu
, die
);
21347 /* If not cached we need to read it in. */
21349 if (this_type
== NULL
)
21351 struct die_info
*type_die
= NULL
;
21352 struct dwarf2_cu
*type_cu
= cu
;
21354 if (attr
->form_is_ref ())
21355 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21356 if (type_die
== NULL
)
21357 return build_error_marker_type (cu
, die
);
21358 /* If we find the type now, it's probably because the type came
21359 from an inter-CU reference and the type's CU got expanded before
21361 this_type
= read_type_die (type_die
, type_cu
);
21364 /* If we still don't have a type use an error marker. */
21366 if (this_type
== NULL
)
21367 return build_error_marker_type (cu
, die
);
21372 /* Return the type in DIE, CU.
21373 Returns NULL for invalid types.
21375 This first does a lookup in die_type_hash,
21376 and only reads the die in if necessary.
21378 NOTE: This can be called when reading in partial or full symbols. */
21380 static struct type
*
21381 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21383 struct type
*this_type
;
21385 this_type
= get_die_type (die
, cu
);
21389 return read_type_die_1 (die
, cu
);
21392 /* Read the type in DIE, CU.
21393 Returns NULL for invalid types. */
21395 static struct type
*
21396 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21398 struct type
*this_type
= NULL
;
21402 case DW_TAG_class_type
:
21403 case DW_TAG_interface_type
:
21404 case DW_TAG_structure_type
:
21405 case DW_TAG_union_type
:
21406 this_type
= read_structure_type (die
, cu
);
21408 case DW_TAG_enumeration_type
:
21409 this_type
= read_enumeration_type (die
, cu
);
21411 case DW_TAG_subprogram
:
21412 case DW_TAG_subroutine_type
:
21413 case DW_TAG_inlined_subroutine
:
21414 this_type
= read_subroutine_type (die
, cu
);
21416 case DW_TAG_array_type
:
21417 this_type
= read_array_type (die
, cu
);
21419 case DW_TAG_set_type
:
21420 this_type
= read_set_type (die
, cu
);
21422 case DW_TAG_pointer_type
:
21423 this_type
= read_tag_pointer_type (die
, cu
);
21425 case DW_TAG_ptr_to_member_type
:
21426 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21428 case DW_TAG_reference_type
:
21429 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21431 case DW_TAG_rvalue_reference_type
:
21432 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21434 case DW_TAG_const_type
:
21435 this_type
= read_tag_const_type (die
, cu
);
21437 case DW_TAG_volatile_type
:
21438 this_type
= read_tag_volatile_type (die
, cu
);
21440 case DW_TAG_restrict_type
:
21441 this_type
= read_tag_restrict_type (die
, cu
);
21443 case DW_TAG_string_type
:
21444 this_type
= read_tag_string_type (die
, cu
);
21446 case DW_TAG_typedef
:
21447 this_type
= read_typedef (die
, cu
);
21449 case DW_TAG_subrange_type
:
21450 this_type
= read_subrange_type (die
, cu
);
21452 case DW_TAG_base_type
:
21453 this_type
= read_base_type (die
, cu
);
21455 case DW_TAG_unspecified_type
:
21456 this_type
= read_unspecified_type (die
, cu
);
21458 case DW_TAG_namespace
:
21459 this_type
= read_namespace_type (die
, cu
);
21461 case DW_TAG_module
:
21462 this_type
= read_module_type (die
, cu
);
21464 case DW_TAG_atomic_type
:
21465 this_type
= read_tag_atomic_type (die
, cu
);
21468 complaint (_("unexpected tag in read_type_die: '%s'"),
21469 dwarf_tag_name (die
->tag
));
21476 /* See if we can figure out if the class lives in a namespace. We do
21477 this by looking for a member function; its demangled name will
21478 contain namespace info, if there is any.
21479 Return the computed name or NULL.
21480 Space for the result is allocated on the objfile's obstack.
21481 This is the full-die version of guess_partial_die_structure_name.
21482 In this case we know DIE has no useful parent. */
21484 static const char *
21485 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21487 struct die_info
*spec_die
;
21488 struct dwarf2_cu
*spec_cu
;
21489 struct die_info
*child
;
21490 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21493 spec_die
= die_specification (die
, &spec_cu
);
21494 if (spec_die
!= NULL
)
21500 for (child
= die
->child
;
21502 child
= child
->sibling
)
21504 if (child
->tag
== DW_TAG_subprogram
)
21506 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21508 if (linkage_name
!= NULL
)
21510 gdb::unique_xmalloc_ptr
<char> actual_name
21511 (language_class_name_from_physname (cu
->language_defn
,
21513 const char *name
= NULL
;
21515 if (actual_name
!= NULL
)
21517 const char *die_name
= dwarf2_name (die
, cu
);
21519 if (die_name
!= NULL
21520 && strcmp (die_name
, actual_name
.get ()) != 0)
21522 /* Strip off the class name from the full name.
21523 We want the prefix. */
21524 int die_name_len
= strlen (die_name
);
21525 int actual_name_len
= strlen (actual_name
.get ());
21526 const char *ptr
= actual_name
.get ();
21528 /* Test for '::' as a sanity check. */
21529 if (actual_name_len
> die_name_len
+ 2
21530 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21531 name
= obstack_strndup (
21532 &objfile
->per_bfd
->storage_obstack
,
21533 ptr
, actual_name_len
- die_name_len
- 2);
21544 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21545 prefix part in such case. See
21546 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21548 static const char *
21549 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21551 struct attribute
*attr
;
21554 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21555 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21558 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21561 attr
= dw2_linkage_name_attr (die
, cu
);
21562 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21565 /* dwarf2_name had to be already called. */
21566 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21568 /* Strip the base name, keep any leading namespaces/classes. */
21569 base
= strrchr (DW_STRING (attr
), ':');
21570 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21573 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21574 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21576 &base
[-1] - DW_STRING (attr
));
21579 /* Return the name of the namespace/class that DIE is defined within,
21580 or "" if we can't tell. The caller should not xfree the result.
21582 For example, if we're within the method foo() in the following
21592 then determine_prefix on foo's die will return "N::C". */
21594 static const char *
21595 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21597 struct dwarf2_per_objfile
*dwarf2_per_objfile
21598 = cu
->per_cu
->dwarf2_per_objfile
;
21599 struct die_info
*parent
, *spec_die
;
21600 struct dwarf2_cu
*spec_cu
;
21601 struct type
*parent_type
;
21602 const char *retval
;
21604 if (cu
->language
!= language_cplus
21605 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21606 && cu
->language
!= language_rust
)
21609 retval
= anonymous_struct_prefix (die
, cu
);
21613 /* We have to be careful in the presence of DW_AT_specification.
21614 For example, with GCC 3.4, given the code
21618 // Definition of N::foo.
21622 then we'll have a tree of DIEs like this:
21624 1: DW_TAG_compile_unit
21625 2: DW_TAG_namespace // N
21626 3: DW_TAG_subprogram // declaration of N::foo
21627 4: DW_TAG_subprogram // definition of N::foo
21628 DW_AT_specification // refers to die #3
21630 Thus, when processing die #4, we have to pretend that we're in
21631 the context of its DW_AT_specification, namely the contex of die
21634 spec_die
= die_specification (die
, &spec_cu
);
21635 if (spec_die
== NULL
)
21636 parent
= die
->parent
;
21639 parent
= spec_die
->parent
;
21643 if (parent
== NULL
)
21645 else if (parent
->building_fullname
)
21648 const char *parent_name
;
21650 /* It has been seen on RealView 2.2 built binaries,
21651 DW_TAG_template_type_param types actually _defined_ as
21652 children of the parent class:
21655 template class <class Enum> Class{};
21656 Class<enum E> class_e;
21658 1: DW_TAG_class_type (Class)
21659 2: DW_TAG_enumeration_type (E)
21660 3: DW_TAG_enumerator (enum1:0)
21661 3: DW_TAG_enumerator (enum2:1)
21663 2: DW_TAG_template_type_param
21664 DW_AT_type DW_FORM_ref_udata (E)
21666 Besides being broken debug info, it can put GDB into an
21667 infinite loop. Consider:
21669 When we're building the full name for Class<E>, we'll start
21670 at Class, and go look over its template type parameters,
21671 finding E. We'll then try to build the full name of E, and
21672 reach here. We're now trying to build the full name of E,
21673 and look over the parent DIE for containing scope. In the
21674 broken case, if we followed the parent DIE of E, we'd again
21675 find Class, and once again go look at its template type
21676 arguments, etc., etc. Simply don't consider such parent die
21677 as source-level parent of this die (it can't be, the language
21678 doesn't allow it), and break the loop here. */
21679 name
= dwarf2_name (die
, cu
);
21680 parent_name
= dwarf2_name (parent
, cu
);
21681 complaint (_("template param type '%s' defined within parent '%s'"),
21682 name
? name
: "<unknown>",
21683 parent_name
? parent_name
: "<unknown>");
21687 switch (parent
->tag
)
21689 case DW_TAG_namespace
:
21690 parent_type
= read_type_die (parent
, cu
);
21691 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21692 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21693 Work around this problem here. */
21694 if (cu
->language
== language_cplus
21695 && strcmp (parent_type
->name (), "::") == 0)
21697 /* We give a name to even anonymous namespaces. */
21698 return parent_type
->name ();
21699 case DW_TAG_class_type
:
21700 case DW_TAG_interface_type
:
21701 case DW_TAG_structure_type
:
21702 case DW_TAG_union_type
:
21703 case DW_TAG_module
:
21704 parent_type
= read_type_die (parent
, cu
);
21705 if (parent_type
->name () != NULL
)
21706 return parent_type
->name ();
21708 /* An anonymous structure is only allowed non-static data
21709 members; no typedefs, no member functions, et cetera.
21710 So it does not need a prefix. */
21712 case DW_TAG_compile_unit
:
21713 case DW_TAG_partial_unit
:
21714 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21715 if (cu
->language
== language_cplus
21716 && !dwarf2_per_objfile
->types
.empty ()
21717 && die
->child
!= NULL
21718 && (die
->tag
== DW_TAG_class_type
21719 || die
->tag
== DW_TAG_structure_type
21720 || die
->tag
== DW_TAG_union_type
))
21722 const char *name
= guess_full_die_structure_name (die
, cu
);
21727 case DW_TAG_subprogram
:
21728 /* Nested subroutines in Fortran get a prefix with the name
21729 of the parent's subroutine. */
21730 if (cu
->language
== language_fortran
)
21732 if ((die
->tag
== DW_TAG_subprogram
)
21733 && (dwarf2_name (parent
, cu
) != NULL
))
21734 return dwarf2_name (parent
, cu
);
21736 return determine_prefix (parent
, cu
);
21737 case DW_TAG_enumeration_type
:
21738 parent_type
= read_type_die (parent
, cu
);
21739 if (TYPE_DECLARED_CLASS (parent_type
))
21741 if (parent_type
->name () != NULL
)
21742 return parent_type
->name ();
21745 /* Fall through. */
21747 return determine_prefix (parent
, cu
);
21751 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21752 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21753 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21754 an obconcat, otherwise allocate storage for the result. The CU argument is
21755 used to determine the language and hence, the appropriate separator. */
21757 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21760 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21761 int physname
, struct dwarf2_cu
*cu
)
21763 const char *lead
= "";
21766 if (suffix
== NULL
|| suffix
[0] == '\0'
21767 || prefix
== NULL
|| prefix
[0] == '\0')
21769 else if (cu
->language
== language_d
)
21771 /* For D, the 'main' function could be defined in any module, but it
21772 should never be prefixed. */
21773 if (strcmp (suffix
, "D main") == 0)
21781 else if (cu
->language
== language_fortran
&& physname
)
21783 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21784 DW_AT_MIPS_linkage_name is preferred and used instead. */
21792 if (prefix
== NULL
)
21794 if (suffix
== NULL
)
21801 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21803 strcpy (retval
, lead
);
21804 strcat (retval
, prefix
);
21805 strcat (retval
, sep
);
21806 strcat (retval
, suffix
);
21811 /* We have an obstack. */
21812 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21816 /* Get name of a die, return NULL if not found. */
21818 static const char *
21819 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21820 struct objfile
*objfile
)
21822 if (name
&& cu
->language
== language_cplus
)
21824 gdb::unique_xmalloc_ptr
<char> canon_name
21825 = cp_canonicalize_string (name
);
21827 if (canon_name
!= nullptr)
21828 name
= objfile
->intern (canon_name
.get ());
21834 /* Get name of a die, return NULL if not found.
21835 Anonymous namespaces are converted to their magic string. */
21837 static const char *
21838 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21840 struct attribute
*attr
;
21841 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21843 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21844 if ((!attr
|| !DW_STRING (attr
))
21845 && die
->tag
!= DW_TAG_namespace
21846 && die
->tag
!= DW_TAG_class_type
21847 && die
->tag
!= DW_TAG_interface_type
21848 && die
->tag
!= DW_TAG_structure_type
21849 && die
->tag
!= DW_TAG_union_type
)
21854 case DW_TAG_compile_unit
:
21855 case DW_TAG_partial_unit
:
21856 /* Compilation units have a DW_AT_name that is a filename, not
21857 a source language identifier. */
21858 case DW_TAG_enumeration_type
:
21859 case DW_TAG_enumerator
:
21860 /* These tags always have simple identifiers already; no need
21861 to canonicalize them. */
21862 return DW_STRING (attr
);
21864 case DW_TAG_namespace
:
21865 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21866 return DW_STRING (attr
);
21867 return CP_ANONYMOUS_NAMESPACE_STR
;
21869 case DW_TAG_class_type
:
21870 case DW_TAG_interface_type
:
21871 case DW_TAG_structure_type
:
21872 case DW_TAG_union_type
:
21873 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21874 structures or unions. These were of the form "._%d" in GCC 4.1,
21875 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21876 and GCC 4.4. We work around this problem by ignoring these. */
21877 if (attr
&& DW_STRING (attr
)
21878 && (startswith (DW_STRING (attr
), "._")
21879 || startswith (DW_STRING (attr
), "<anonymous")))
21882 /* GCC might emit a nameless typedef that has a linkage name. See
21883 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21884 if (!attr
|| DW_STRING (attr
) == NULL
)
21886 attr
= dw2_linkage_name_attr (die
, cu
);
21887 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21890 /* Avoid demangling DW_STRING (attr) the second time on a second
21891 call for the same DIE. */
21892 if (!DW_STRING_IS_CANONICAL (attr
))
21894 gdb::unique_xmalloc_ptr
<char> demangled
21895 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21896 if (demangled
== nullptr)
21899 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21900 DW_STRING_IS_CANONICAL (attr
) = 1;
21903 /* Strip any leading namespaces/classes, keep only the base name.
21904 DW_AT_name for named DIEs does not contain the prefixes. */
21905 const char *base
= strrchr (DW_STRING (attr
), ':');
21906 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21909 return DW_STRING (attr
);
21917 if (!DW_STRING_IS_CANONICAL (attr
))
21919 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21921 DW_STRING_IS_CANONICAL (attr
) = 1;
21923 return DW_STRING (attr
);
21926 /* Return the die that this die in an extension of, or NULL if there
21927 is none. *EXT_CU is the CU containing DIE on input, and the CU
21928 containing the return value on output. */
21930 static struct die_info
*
21931 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21933 struct attribute
*attr
;
21935 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21939 return follow_die_ref (die
, attr
, ext_cu
);
21943 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21947 print_spaces (indent
, f
);
21948 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21949 dwarf_tag_name (die
->tag
), die
->abbrev
,
21950 sect_offset_str (die
->sect_off
));
21952 if (die
->parent
!= NULL
)
21954 print_spaces (indent
, f
);
21955 fprintf_unfiltered (f
, " parent at offset: %s\n",
21956 sect_offset_str (die
->parent
->sect_off
));
21959 print_spaces (indent
, f
);
21960 fprintf_unfiltered (f
, " has children: %s\n",
21961 dwarf_bool_name (die
->child
!= NULL
));
21963 print_spaces (indent
, f
);
21964 fprintf_unfiltered (f
, " attributes:\n");
21966 for (i
= 0; i
< die
->num_attrs
; ++i
)
21968 print_spaces (indent
, f
);
21969 fprintf_unfiltered (f
, " %s (%s) ",
21970 dwarf_attr_name (die
->attrs
[i
].name
),
21971 dwarf_form_name (die
->attrs
[i
].form
));
21973 switch (die
->attrs
[i
].form
)
21976 case DW_FORM_addrx
:
21977 case DW_FORM_GNU_addr_index
:
21978 fprintf_unfiltered (f
, "address: ");
21979 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21981 case DW_FORM_block2
:
21982 case DW_FORM_block4
:
21983 case DW_FORM_block
:
21984 case DW_FORM_block1
:
21985 fprintf_unfiltered (f
, "block: size %s",
21986 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21988 case DW_FORM_exprloc
:
21989 fprintf_unfiltered (f
, "expression: size %s",
21990 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21992 case DW_FORM_data16
:
21993 fprintf_unfiltered (f
, "constant of 16 bytes");
21995 case DW_FORM_ref_addr
:
21996 fprintf_unfiltered (f
, "ref address: ");
21997 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21999 case DW_FORM_GNU_ref_alt
:
22000 fprintf_unfiltered (f
, "alt ref address: ");
22001 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22007 case DW_FORM_ref_udata
:
22008 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22009 (long) (DW_UNSND (&die
->attrs
[i
])));
22011 case DW_FORM_data1
:
22012 case DW_FORM_data2
:
22013 case DW_FORM_data4
:
22014 case DW_FORM_data8
:
22015 case DW_FORM_udata
:
22016 case DW_FORM_sdata
:
22017 fprintf_unfiltered (f
, "constant: %s",
22018 pulongest (DW_UNSND (&die
->attrs
[i
])));
22020 case DW_FORM_sec_offset
:
22021 fprintf_unfiltered (f
, "section offset: %s",
22022 pulongest (DW_UNSND (&die
->attrs
[i
])));
22024 case DW_FORM_ref_sig8
:
22025 fprintf_unfiltered (f
, "signature: %s",
22026 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22028 case DW_FORM_string
:
22030 case DW_FORM_line_strp
:
22032 case DW_FORM_GNU_str_index
:
22033 case DW_FORM_GNU_strp_alt
:
22034 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22035 DW_STRING (&die
->attrs
[i
])
22036 ? DW_STRING (&die
->attrs
[i
]) : "",
22037 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22040 if (DW_UNSND (&die
->attrs
[i
]))
22041 fprintf_unfiltered (f
, "flag: TRUE");
22043 fprintf_unfiltered (f
, "flag: FALSE");
22045 case DW_FORM_flag_present
:
22046 fprintf_unfiltered (f
, "flag: TRUE");
22048 case DW_FORM_indirect
:
22049 /* The reader will have reduced the indirect form to
22050 the "base form" so this form should not occur. */
22051 fprintf_unfiltered (f
,
22052 "unexpected attribute form: DW_FORM_indirect");
22054 case DW_FORM_implicit_const
:
22055 fprintf_unfiltered (f
, "constant: %s",
22056 plongest (DW_SND (&die
->attrs
[i
])));
22059 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22060 die
->attrs
[i
].form
);
22063 fprintf_unfiltered (f
, "\n");
22068 dump_die_for_error (struct die_info
*die
)
22070 dump_die_shallow (gdb_stderr
, 0, die
);
22074 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22076 int indent
= level
* 4;
22078 gdb_assert (die
!= NULL
);
22080 if (level
>= max_level
)
22083 dump_die_shallow (f
, indent
, die
);
22085 if (die
->child
!= NULL
)
22087 print_spaces (indent
, f
);
22088 fprintf_unfiltered (f
, " Children:");
22089 if (level
+ 1 < max_level
)
22091 fprintf_unfiltered (f
, "\n");
22092 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22096 fprintf_unfiltered (f
,
22097 " [not printed, max nesting level reached]\n");
22101 if (die
->sibling
!= NULL
&& level
> 0)
22103 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22107 /* This is called from the pdie macro in gdbinit.in.
22108 It's not static so gcc will keep a copy callable from gdb. */
22111 dump_die (struct die_info
*die
, int max_level
)
22113 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22117 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22121 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22122 to_underlying (die
->sect_off
),
22128 /* Follow reference or signature attribute ATTR of SRC_DIE.
22129 On entry *REF_CU is the CU of SRC_DIE.
22130 On exit *REF_CU is the CU of the result. */
22132 static struct die_info
*
22133 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22134 struct dwarf2_cu
**ref_cu
)
22136 struct die_info
*die
;
22138 if (attr
->form_is_ref ())
22139 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22140 else if (attr
->form
== DW_FORM_ref_sig8
)
22141 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22144 dump_die_for_error (src_die
);
22145 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22146 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22152 /* Follow reference OFFSET.
22153 On entry *REF_CU is the CU of the source die referencing OFFSET.
22154 On exit *REF_CU is the CU of the result.
22155 Returns NULL if OFFSET is invalid. */
22157 static struct die_info
*
22158 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22159 struct dwarf2_cu
**ref_cu
)
22161 struct die_info temp_die
;
22162 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22163 struct dwarf2_per_objfile
*dwarf2_per_objfile
22164 = cu
->per_cu
->dwarf2_per_objfile
;
22166 gdb_assert (cu
->per_cu
!= NULL
);
22170 if (cu
->per_cu
->is_debug_types
)
22172 /* .debug_types CUs cannot reference anything outside their CU.
22173 If they need to, they have to reference a signatured type via
22174 DW_FORM_ref_sig8. */
22175 if (!cu
->header
.offset_in_cu_p (sect_off
))
22178 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22179 || !cu
->header
.offset_in_cu_p (sect_off
))
22181 struct dwarf2_per_cu_data
*per_cu
;
22183 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22184 dwarf2_per_objfile
);
22186 /* If necessary, add it to the queue and load its DIEs. */
22187 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22188 load_full_comp_unit (per_cu
, false, cu
->language
);
22190 target_cu
= per_cu
->cu
;
22192 else if (cu
->dies
== NULL
)
22194 /* We're loading full DIEs during partial symbol reading. */
22195 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22196 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22199 *ref_cu
= target_cu
;
22200 temp_die
.sect_off
= sect_off
;
22202 if (target_cu
!= cu
)
22203 target_cu
->ancestor
= cu
;
22205 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22207 to_underlying (sect_off
));
22210 /* Follow reference attribute ATTR of SRC_DIE.
22211 On entry *REF_CU is the CU of SRC_DIE.
22212 On exit *REF_CU is the CU of the result. */
22214 static struct die_info
*
22215 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22216 struct dwarf2_cu
**ref_cu
)
22218 sect_offset sect_off
= attr
->get_ref_die_offset ();
22219 struct dwarf2_cu
*cu
= *ref_cu
;
22220 struct die_info
*die
;
22222 die
= follow_die_offset (sect_off
,
22223 (attr
->form
== DW_FORM_GNU_ref_alt
22224 || cu
->per_cu
->is_dwz
),
22227 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22228 "at %s [in module %s]"),
22229 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22230 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22237 struct dwarf2_locexpr_baton
22238 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22239 dwarf2_per_cu_data
*per_cu
,
22240 CORE_ADDR (*get_frame_pc
) (void *baton
),
22241 void *baton
, bool resolve_abstract_p
)
22243 struct dwarf2_cu
*cu
;
22244 struct die_info
*die
;
22245 struct attribute
*attr
;
22246 struct dwarf2_locexpr_baton retval
;
22247 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22248 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22250 if (per_cu
->cu
== NULL
)
22251 load_cu (per_cu
, false);
22255 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22256 Instead just throw an error, not much else we can do. */
22257 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22258 sect_offset_str (sect_off
), objfile_name (objfile
));
22261 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22263 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22264 sect_offset_str (sect_off
), objfile_name (objfile
));
22266 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22267 if (!attr
&& resolve_abstract_p
22268 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22269 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22271 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22272 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22273 struct gdbarch
*gdbarch
= objfile
->arch ();
22275 for (const auto &cand_off
22276 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22278 struct dwarf2_cu
*cand_cu
= cu
;
22279 struct die_info
*cand
22280 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22283 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22286 CORE_ADDR pc_low
, pc_high
;
22287 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22288 if (pc_low
== ((CORE_ADDR
) -1))
22290 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22291 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22292 if (!(pc_low
<= pc
&& pc
< pc_high
))
22296 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22303 /* DWARF: "If there is no such attribute, then there is no effect.".
22304 DATA is ignored if SIZE is 0. */
22306 retval
.data
= NULL
;
22309 else if (attr
->form_is_section_offset ())
22311 struct dwarf2_loclist_baton loclist_baton
;
22312 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22315 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22317 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22319 retval
.size
= size
;
22323 if (!attr
->form_is_block ())
22324 error (_("Dwarf Error: DIE at %s referenced in module %s "
22325 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22326 sect_offset_str (sect_off
), objfile_name (objfile
));
22328 retval
.data
= DW_BLOCK (attr
)->data
;
22329 retval
.size
= DW_BLOCK (attr
)->size
;
22331 retval
.per_cu
= cu
->per_cu
;
22333 age_cached_comp_units (dwarf2_per_objfile
);
22340 struct dwarf2_locexpr_baton
22341 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22342 dwarf2_per_cu_data
*per_cu
,
22343 CORE_ADDR (*get_frame_pc
) (void *baton
),
22346 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22348 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22351 /* Write a constant of a given type as target-ordered bytes into
22354 static const gdb_byte
*
22355 write_constant_as_bytes (struct obstack
*obstack
,
22356 enum bfd_endian byte_order
,
22363 *len
= TYPE_LENGTH (type
);
22364 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22365 store_unsigned_integer (result
, *len
, byte_order
, value
);
22373 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22374 dwarf2_per_cu_data
*per_cu
,
22378 struct dwarf2_cu
*cu
;
22379 struct die_info
*die
;
22380 struct attribute
*attr
;
22381 const gdb_byte
*result
= NULL
;
22384 enum bfd_endian byte_order
;
22385 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22387 if (per_cu
->cu
== NULL
)
22388 load_cu (per_cu
, false);
22392 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22393 Instead just throw an error, not much else we can do. */
22394 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22395 sect_offset_str (sect_off
), objfile_name (objfile
));
22398 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22400 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22401 sect_offset_str (sect_off
), objfile_name (objfile
));
22403 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22407 byte_order
= (bfd_big_endian (objfile
->obfd
)
22408 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22410 switch (attr
->form
)
22413 case DW_FORM_addrx
:
22414 case DW_FORM_GNU_addr_index
:
22418 *len
= cu
->header
.addr_size
;
22419 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22420 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22424 case DW_FORM_string
:
22427 case DW_FORM_GNU_str_index
:
22428 case DW_FORM_GNU_strp_alt
:
22429 /* DW_STRING is already allocated on the objfile obstack, point
22431 result
= (const gdb_byte
*) DW_STRING (attr
);
22432 *len
= strlen (DW_STRING (attr
));
22434 case DW_FORM_block1
:
22435 case DW_FORM_block2
:
22436 case DW_FORM_block4
:
22437 case DW_FORM_block
:
22438 case DW_FORM_exprloc
:
22439 case DW_FORM_data16
:
22440 result
= DW_BLOCK (attr
)->data
;
22441 *len
= DW_BLOCK (attr
)->size
;
22444 /* The DW_AT_const_value attributes are supposed to carry the
22445 symbol's value "represented as it would be on the target
22446 architecture." By the time we get here, it's already been
22447 converted to host endianness, so we just need to sign- or
22448 zero-extend it as appropriate. */
22449 case DW_FORM_data1
:
22450 type
= die_type (die
, cu
);
22451 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22452 if (result
== NULL
)
22453 result
= write_constant_as_bytes (obstack
, byte_order
,
22456 case DW_FORM_data2
:
22457 type
= die_type (die
, cu
);
22458 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22459 if (result
== NULL
)
22460 result
= write_constant_as_bytes (obstack
, byte_order
,
22463 case DW_FORM_data4
:
22464 type
= die_type (die
, cu
);
22465 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22466 if (result
== NULL
)
22467 result
= write_constant_as_bytes (obstack
, byte_order
,
22470 case DW_FORM_data8
:
22471 type
= die_type (die
, cu
);
22472 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22473 if (result
== NULL
)
22474 result
= write_constant_as_bytes (obstack
, byte_order
,
22478 case DW_FORM_sdata
:
22479 case DW_FORM_implicit_const
:
22480 type
= die_type (die
, cu
);
22481 result
= write_constant_as_bytes (obstack
, byte_order
,
22482 type
, DW_SND (attr
), len
);
22485 case DW_FORM_udata
:
22486 type
= die_type (die
, cu
);
22487 result
= write_constant_as_bytes (obstack
, byte_order
,
22488 type
, DW_UNSND (attr
), len
);
22492 complaint (_("unsupported const value attribute form: '%s'"),
22493 dwarf_form_name (attr
->form
));
22503 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22504 dwarf2_per_cu_data
*per_cu
)
22506 struct dwarf2_cu
*cu
;
22507 struct die_info
*die
;
22509 if (per_cu
->cu
== NULL
)
22510 load_cu (per_cu
, false);
22515 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22519 return die_type (die
, cu
);
22525 dwarf2_get_die_type (cu_offset die_offset
,
22526 struct dwarf2_per_cu_data
*per_cu
)
22528 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22529 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22532 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22533 On entry *REF_CU is the CU of SRC_DIE.
22534 On exit *REF_CU is the CU of the result.
22535 Returns NULL if the referenced DIE isn't found. */
22537 static struct die_info
*
22538 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22539 struct dwarf2_cu
**ref_cu
)
22541 struct die_info temp_die
;
22542 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22543 struct die_info
*die
;
22545 /* While it might be nice to assert sig_type->type == NULL here,
22546 we can get here for DW_AT_imported_declaration where we need
22547 the DIE not the type. */
22549 /* If necessary, add it to the queue and load its DIEs. */
22551 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22552 read_signatured_type (sig_type
);
22554 sig_cu
= sig_type
->per_cu
.cu
;
22555 gdb_assert (sig_cu
!= NULL
);
22556 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22557 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22558 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22559 to_underlying (temp_die
.sect_off
));
22562 struct dwarf2_per_objfile
*dwarf2_per_objfile
22563 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22565 /* For .gdb_index version 7 keep track of included TUs.
22566 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22567 if (dwarf2_per_objfile
->index_table
!= NULL
22568 && dwarf2_per_objfile
->index_table
->version
<= 7)
22570 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22575 sig_cu
->ancestor
= cu
;
22583 /* Follow signatured type referenced by ATTR in SRC_DIE.
22584 On entry *REF_CU is the CU of SRC_DIE.
22585 On exit *REF_CU is the CU of the result.
22586 The result is the DIE of the type.
22587 If the referenced type cannot be found an error is thrown. */
22589 static struct die_info
*
22590 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22591 struct dwarf2_cu
**ref_cu
)
22593 ULONGEST signature
= DW_SIGNATURE (attr
);
22594 struct signatured_type
*sig_type
;
22595 struct die_info
*die
;
22597 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22599 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22600 /* sig_type will be NULL if the signatured type is missing from
22602 if (sig_type
== NULL
)
22604 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22605 " from DIE at %s [in module %s]"),
22606 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22607 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22610 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22613 dump_die_for_error (src_die
);
22614 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22615 " from DIE at %s [in module %s]"),
22616 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22617 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22623 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22624 reading in and processing the type unit if necessary. */
22626 static struct type
*
22627 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22628 struct dwarf2_cu
*cu
)
22630 struct dwarf2_per_objfile
*dwarf2_per_objfile
22631 = cu
->per_cu
->dwarf2_per_objfile
;
22632 struct signatured_type
*sig_type
;
22633 struct dwarf2_cu
*type_cu
;
22634 struct die_info
*type_die
;
22637 sig_type
= lookup_signatured_type (cu
, signature
);
22638 /* sig_type will be NULL if the signatured type is missing from
22640 if (sig_type
== NULL
)
22642 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22643 " from DIE at %s [in module %s]"),
22644 hex_string (signature
), sect_offset_str (die
->sect_off
),
22645 objfile_name (dwarf2_per_objfile
->objfile
));
22646 return build_error_marker_type (cu
, die
);
22649 /* If we already know the type we're done. */
22650 if (sig_type
->type
!= NULL
)
22651 return sig_type
->type
;
22654 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22655 if (type_die
!= NULL
)
22657 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22658 is created. This is important, for example, because for c++ classes
22659 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22660 type
= read_type_die (type_die
, type_cu
);
22663 complaint (_("Dwarf Error: Cannot build signatured type %s"
22664 " referenced from DIE at %s [in module %s]"),
22665 hex_string (signature
), sect_offset_str (die
->sect_off
),
22666 objfile_name (dwarf2_per_objfile
->objfile
));
22667 type
= build_error_marker_type (cu
, die
);
22672 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22673 " from DIE at %s [in module %s]"),
22674 hex_string (signature
), sect_offset_str (die
->sect_off
),
22675 objfile_name (dwarf2_per_objfile
->objfile
));
22676 type
= build_error_marker_type (cu
, die
);
22678 sig_type
->type
= type
;
22683 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22684 reading in and processing the type unit if necessary. */
22686 static struct type
*
22687 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22688 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22690 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22691 if (attr
->form_is_ref ())
22693 struct dwarf2_cu
*type_cu
= cu
;
22694 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22696 return read_type_die (type_die
, type_cu
);
22698 else if (attr
->form
== DW_FORM_ref_sig8
)
22700 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22704 struct dwarf2_per_objfile
*dwarf2_per_objfile
22705 = cu
->per_cu
->dwarf2_per_objfile
;
22707 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22708 " at %s [in module %s]"),
22709 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22710 objfile_name (dwarf2_per_objfile
->objfile
));
22711 return build_error_marker_type (cu
, die
);
22715 /* Load the DIEs associated with type unit PER_CU into memory. */
22718 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22720 struct signatured_type
*sig_type
;
22722 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22723 gdb_assert (! per_cu
->type_unit_group_p ());
22725 /* We have the per_cu, but we need the signatured_type.
22726 Fortunately this is an easy translation. */
22727 gdb_assert (per_cu
->is_debug_types
);
22728 sig_type
= (struct signatured_type
*) per_cu
;
22730 gdb_assert (per_cu
->cu
== NULL
);
22732 read_signatured_type (sig_type
);
22734 gdb_assert (per_cu
->cu
!= NULL
);
22737 /* Read in a signatured type and build its CU and DIEs.
22738 If the type is a stub for the real type in a DWO file,
22739 read in the real type from the DWO file as well. */
22742 read_signatured_type (struct signatured_type
*sig_type
)
22744 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22746 gdb_assert (per_cu
->is_debug_types
);
22747 gdb_assert (per_cu
->cu
== NULL
);
22749 cutu_reader
reader (per_cu
, NULL
, 0, false);
22751 if (!reader
.dummy_p
)
22753 struct dwarf2_cu
*cu
= reader
.cu
;
22754 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22756 gdb_assert (cu
->die_hash
== NULL
);
22758 htab_create_alloc_ex (cu
->header
.length
/ 12,
22762 &cu
->comp_unit_obstack
,
22763 hashtab_obstack_allocate
,
22764 dummy_obstack_deallocate
);
22766 if (reader
.comp_unit_die
->has_children
)
22767 reader
.comp_unit_die
->child
22768 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22769 reader
.comp_unit_die
);
22770 cu
->dies
= reader
.comp_unit_die
;
22771 /* comp_unit_die is not stored in die_hash, no need. */
22773 /* We try not to read any attributes in this function, because
22774 not all CUs needed for references have been loaded yet, and
22775 symbol table processing isn't initialized. But we have to
22776 set the CU language, or we won't be able to build types
22777 correctly. Similarly, if we do not read the producer, we can
22778 not apply producer-specific interpretation. */
22779 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22784 sig_type
->per_cu
.tu_read
= 1;
22787 /* Decode simple location descriptions.
22788 Given a pointer to a dwarf block that defines a location, compute
22789 the location and return the value. If COMPUTED is non-null, it is
22790 set to true to indicate that decoding was successful, and false
22791 otherwise. If COMPUTED is null, then this function may emit a
22795 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22797 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22799 size_t size
= blk
->size
;
22800 const gdb_byte
*data
= blk
->data
;
22801 CORE_ADDR stack
[64];
22803 unsigned int bytes_read
, unsnd
;
22806 if (computed
!= nullptr)
22812 stack
[++stacki
] = 0;
22851 stack
[++stacki
] = op
- DW_OP_lit0
;
22886 stack
[++stacki
] = op
- DW_OP_reg0
;
22889 if (computed
== nullptr)
22890 dwarf2_complex_location_expr_complaint ();
22897 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22899 stack
[++stacki
] = unsnd
;
22902 if (computed
== nullptr)
22903 dwarf2_complex_location_expr_complaint ();
22910 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22915 case DW_OP_const1u
:
22916 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22920 case DW_OP_const1s
:
22921 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22925 case DW_OP_const2u
:
22926 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22930 case DW_OP_const2s
:
22931 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22935 case DW_OP_const4u
:
22936 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22940 case DW_OP_const4s
:
22941 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22945 case DW_OP_const8u
:
22946 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22951 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22957 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22962 stack
[stacki
+ 1] = stack
[stacki
];
22967 stack
[stacki
- 1] += stack
[stacki
];
22971 case DW_OP_plus_uconst
:
22972 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22978 stack
[stacki
- 1] -= stack
[stacki
];
22983 /* If we're not the last op, then we definitely can't encode
22984 this using GDB's address_class enum. This is valid for partial
22985 global symbols, although the variable's address will be bogus
22989 if (computed
== nullptr)
22990 dwarf2_complex_location_expr_complaint ();
22996 case DW_OP_GNU_push_tls_address
:
22997 case DW_OP_form_tls_address
:
22998 /* The top of the stack has the offset from the beginning
22999 of the thread control block at which the variable is located. */
23000 /* Nothing should follow this operator, so the top of stack would
23002 /* This is valid for partial global symbols, but the variable's
23003 address will be bogus in the psymtab. Make it always at least
23004 non-zero to not look as a variable garbage collected by linker
23005 which have DW_OP_addr 0. */
23008 if (computed
== nullptr)
23009 dwarf2_complex_location_expr_complaint ();
23016 case DW_OP_GNU_uninit
:
23017 if (computed
!= nullptr)
23022 case DW_OP_GNU_addr_index
:
23023 case DW_OP_GNU_const_index
:
23024 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23030 if (computed
== nullptr)
23032 const char *name
= get_DW_OP_name (op
);
23035 complaint (_("unsupported stack op: '%s'"),
23038 complaint (_("unsupported stack op: '%02x'"),
23042 return (stack
[stacki
]);
23045 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23046 outside of the allocated space. Also enforce minimum>0. */
23047 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23049 if (computed
== nullptr)
23050 complaint (_("location description stack overflow"));
23056 if (computed
== nullptr)
23057 complaint (_("location description stack underflow"));
23062 if (computed
!= nullptr)
23064 return (stack
[stacki
]);
23067 /* memory allocation interface */
23069 static struct dwarf_block
*
23070 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23072 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23075 static struct die_info
*
23076 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23078 struct die_info
*die
;
23079 size_t size
= sizeof (struct die_info
);
23082 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23084 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23085 memset (die
, 0, sizeof (struct die_info
));
23091 /* Macro support. */
23093 /* An overload of dwarf_decode_macros that finds the correct section
23094 and ensures it is read in before calling the other overload. */
23097 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23098 int section_is_gnu
)
23100 struct dwarf2_per_objfile
*dwarf2_per_objfile
23101 = cu
->per_cu
->dwarf2_per_objfile
;
23102 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23103 const struct line_header
*lh
= cu
->line_header
;
23104 unsigned int offset_size
= cu
->header
.offset_size
;
23105 struct dwarf2_section_info
*section
;
23106 const char *section_name
;
23108 if (cu
->dwo_unit
!= nullptr)
23110 if (section_is_gnu
)
23112 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23113 section_name
= ".debug_macro.dwo";
23117 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23118 section_name
= ".debug_macinfo.dwo";
23123 if (section_is_gnu
)
23125 section
= &dwarf2_per_objfile
->macro
;
23126 section_name
= ".debug_macro";
23130 section
= &dwarf2_per_objfile
->macinfo
;
23131 section_name
= ".debug_macinfo";
23135 section
->read (objfile
);
23136 if (section
->buffer
== nullptr)
23138 complaint (_("missing %s section"), section_name
);
23142 buildsym_compunit
*builder
= cu
->get_builder ();
23144 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23145 offset_size
, offset
, section_is_gnu
);
23148 /* Return the .debug_loc section to use for CU.
23149 For DWO files use .debug_loc.dwo. */
23151 static struct dwarf2_section_info
*
23152 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23154 struct dwarf2_per_objfile
*dwarf2_per_objfile
23155 = cu
->per_cu
->dwarf2_per_objfile
;
23159 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23161 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23163 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23164 : &dwarf2_per_objfile
->loc
);
23167 /* A helper function that fills in a dwarf2_loclist_baton. */
23170 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23171 struct dwarf2_loclist_baton
*baton
,
23172 const struct attribute
*attr
)
23174 struct dwarf2_per_objfile
*dwarf2_per_objfile
23175 = cu
->per_cu
->dwarf2_per_objfile
;
23176 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23178 section
->read (dwarf2_per_objfile
->objfile
);
23180 baton
->per_cu
= cu
->per_cu
;
23181 gdb_assert (baton
->per_cu
);
23182 /* We don't know how long the location list is, but make sure we
23183 don't run off the edge of the section. */
23184 baton
->size
= section
->size
- DW_UNSND (attr
);
23185 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23186 if (cu
->base_address
.has_value ())
23187 baton
->base_address
= *cu
->base_address
;
23189 baton
->base_address
= 0;
23190 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23194 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23195 struct dwarf2_cu
*cu
, int is_block
)
23197 struct dwarf2_per_objfile
*dwarf2_per_objfile
23198 = cu
->per_cu
->dwarf2_per_objfile
;
23199 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23200 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23202 if (attr
->form_is_section_offset ()
23203 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23204 the section. If so, fall through to the complaint in the
23206 && DW_UNSND (attr
) < section
->get_size (objfile
))
23208 struct dwarf2_loclist_baton
*baton
;
23210 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23212 fill_in_loclist_baton (cu
, baton
, attr
);
23214 if (!cu
->base_address
.has_value ())
23215 complaint (_("Location list used without "
23216 "specifying the CU base address."));
23218 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23219 ? dwarf2_loclist_block_index
23220 : dwarf2_loclist_index
);
23221 SYMBOL_LOCATION_BATON (sym
) = baton
;
23225 struct dwarf2_locexpr_baton
*baton
;
23227 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23228 baton
->per_cu
= cu
->per_cu
;
23229 gdb_assert (baton
->per_cu
);
23231 if (attr
->form_is_block ())
23233 /* Note that we're just copying the block's data pointer
23234 here, not the actual data. We're still pointing into the
23235 info_buffer for SYM's objfile; right now we never release
23236 that buffer, but when we do clean up properly this may
23238 baton
->size
= DW_BLOCK (attr
)->size
;
23239 baton
->data
= DW_BLOCK (attr
)->data
;
23243 dwarf2_invalid_attrib_class_complaint ("location description",
23244 sym
->natural_name ());
23248 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23249 ? dwarf2_locexpr_block_index
23250 : dwarf2_locexpr_index
);
23251 SYMBOL_LOCATION_BATON (sym
) = baton
;
23258 dwarf2_per_cu_data::objfile () const
23260 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23262 /* Return the master objfile, so that we can report and look up the
23263 correct file containing this variable. */
23264 if (objfile
->separate_debug_objfile_backlink
)
23265 objfile
= objfile
->separate_debug_objfile_backlink
;
23270 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23271 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23272 CU_HEADERP first. */
23274 static const struct comp_unit_head
*
23275 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23276 const struct dwarf2_per_cu_data
*per_cu
)
23278 const gdb_byte
*info_ptr
;
23281 return &per_cu
->cu
->header
;
23283 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23285 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23286 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23287 rcuh_kind::COMPILE
);
23295 dwarf2_per_cu_data::addr_size () const
23297 struct comp_unit_head cu_header_local
;
23298 const struct comp_unit_head
*cu_headerp
;
23300 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23302 return cu_headerp
->addr_size
;
23308 dwarf2_per_cu_data::offset_size () const
23310 struct comp_unit_head cu_header_local
;
23311 const struct comp_unit_head
*cu_headerp
;
23313 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23315 return cu_headerp
->offset_size
;
23321 dwarf2_per_cu_data::ref_addr_size () const
23323 struct comp_unit_head cu_header_local
;
23324 const struct comp_unit_head
*cu_headerp
;
23326 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23328 if (cu_headerp
->version
== 2)
23329 return cu_headerp
->addr_size
;
23331 return cu_headerp
->offset_size
;
23337 dwarf2_per_cu_data::text_offset () const
23339 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23341 return objfile
->text_section_offset ();
23347 dwarf2_per_cu_data::addr_type () const
23349 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23350 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23351 struct type
*addr_type
= lookup_pointer_type (void_type
);
23352 int addr_size
= this->addr_size ();
23354 if (TYPE_LENGTH (addr_type
) == addr_size
)
23357 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23361 /* A helper function for dwarf2_find_containing_comp_unit that returns
23362 the index of the result, and that searches a vector. It will
23363 return a result even if the offset in question does not actually
23364 occur in any CU. This is separate so that it can be unit
23368 dwarf2_find_containing_comp_unit
23369 (sect_offset sect_off
,
23370 unsigned int offset_in_dwz
,
23371 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23376 high
= all_comp_units
.size () - 1;
23379 struct dwarf2_per_cu_data
*mid_cu
;
23380 int mid
= low
+ (high
- low
) / 2;
23382 mid_cu
= all_comp_units
[mid
];
23383 if (mid_cu
->is_dwz
> offset_in_dwz
23384 || (mid_cu
->is_dwz
== offset_in_dwz
23385 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23390 gdb_assert (low
== high
);
23394 /* Locate the .debug_info compilation unit from CU's objfile which contains
23395 the DIE at OFFSET. Raises an error on failure. */
23397 static struct dwarf2_per_cu_data
*
23398 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23399 unsigned int offset_in_dwz
,
23400 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23403 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23404 dwarf2_per_objfile
->all_comp_units
);
23405 struct dwarf2_per_cu_data
*this_cu
23406 = dwarf2_per_objfile
->all_comp_units
[low
];
23408 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23410 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23411 error (_("Dwarf Error: could not find partial DIE containing "
23412 "offset %s [in module %s]"),
23413 sect_offset_str (sect_off
),
23414 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23416 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23418 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23422 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23423 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23424 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23425 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23432 namespace selftests
{
23433 namespace find_containing_comp_unit
{
23438 struct dwarf2_per_cu_data one
{};
23439 struct dwarf2_per_cu_data two
{};
23440 struct dwarf2_per_cu_data three
{};
23441 struct dwarf2_per_cu_data four
{};
23444 two
.sect_off
= sect_offset (one
.length
);
23449 four
.sect_off
= sect_offset (three
.length
);
23453 std::vector
<dwarf2_per_cu_data
*> units
;
23454 units
.push_back (&one
);
23455 units
.push_back (&two
);
23456 units
.push_back (&three
);
23457 units
.push_back (&four
);
23461 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23462 SELF_CHECK (units
[result
] == &one
);
23463 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23464 SELF_CHECK (units
[result
] == &one
);
23465 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23466 SELF_CHECK (units
[result
] == &two
);
23468 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23469 SELF_CHECK (units
[result
] == &three
);
23470 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23471 SELF_CHECK (units
[result
] == &three
);
23472 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23473 SELF_CHECK (units
[result
] == &four
);
23479 #endif /* GDB_SELF_TEST */
23481 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23483 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23484 : per_cu (per_cu_
),
23486 has_loclist (false),
23487 checked_producer (false),
23488 producer_is_gxx_lt_4_6 (false),
23489 producer_is_gcc_lt_4_3 (false),
23490 producer_is_icc (false),
23491 producer_is_icc_lt_14 (false),
23492 producer_is_codewarrior (false),
23493 processing_has_namespace_info (false)
23498 /* Destroy a dwarf2_cu. */
23500 dwarf2_cu::~dwarf2_cu ()
23505 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23508 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23509 enum language pretend_language
)
23511 struct attribute
*attr
;
23513 /* Set the language we're debugging. */
23514 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23515 if (attr
!= nullptr)
23516 set_cu_language (DW_UNSND (attr
), cu
);
23519 cu
->language
= pretend_language
;
23520 cu
->language_defn
= language_def (cu
->language
);
23523 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23526 /* Increase the age counter on each cached compilation unit, and free
23527 any that are too old. */
23530 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23532 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23534 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23535 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23536 while (per_cu
!= NULL
)
23538 per_cu
->cu
->last_used
++;
23539 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23540 dwarf2_mark (per_cu
->cu
);
23541 per_cu
= per_cu
->cu
->read_in_chain
;
23544 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23545 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23546 while (per_cu
!= NULL
)
23548 struct dwarf2_per_cu_data
*next_cu
;
23550 next_cu
= per_cu
->cu
->read_in_chain
;
23552 if (!per_cu
->cu
->mark
)
23555 *last_chain
= next_cu
;
23558 last_chain
= &per_cu
->cu
->read_in_chain
;
23564 /* Remove a single compilation unit from the cache. */
23567 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23569 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23570 struct dwarf2_per_objfile
*dwarf2_per_objfile
23571 = target_per_cu
->dwarf2_per_objfile
;
23573 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23574 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23575 while (per_cu
!= NULL
)
23577 struct dwarf2_per_cu_data
*next_cu
;
23579 next_cu
= per_cu
->cu
->read_in_chain
;
23581 if (per_cu
== target_per_cu
)
23585 *last_chain
= next_cu
;
23589 last_chain
= &per_cu
->cu
->read_in_chain
;
23595 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23596 We store these in a hash table separate from the DIEs, and preserve them
23597 when the DIEs are flushed out of cache.
23599 The CU "per_cu" pointer is needed because offset alone is not enough to
23600 uniquely identify the type. A file may have multiple .debug_types sections,
23601 or the type may come from a DWO file. Furthermore, while it's more logical
23602 to use per_cu->section+offset, with Fission the section with the data is in
23603 the DWO file but we don't know that section at the point we need it.
23604 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23605 because we can enter the lookup routine, get_die_type_at_offset, from
23606 outside this file, and thus won't necessarily have PER_CU->cu.
23607 Fortunately, PER_CU is stable for the life of the objfile. */
23609 struct dwarf2_per_cu_offset_and_type
23611 const struct dwarf2_per_cu_data
*per_cu
;
23612 sect_offset sect_off
;
23616 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23619 per_cu_offset_and_type_hash (const void *item
)
23621 const struct dwarf2_per_cu_offset_and_type
*ofs
23622 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23624 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23627 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23630 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23632 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23633 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23634 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23635 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23637 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23638 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23641 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23642 table if necessary. For convenience, return TYPE.
23644 The DIEs reading must have careful ordering to:
23645 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23646 reading current DIE.
23647 * Not trying to dereference contents of still incompletely read in types
23648 while reading in other DIEs.
23649 * Enable referencing still incompletely read in types just by a pointer to
23650 the type without accessing its fields.
23652 Therefore caller should follow these rules:
23653 * Try to fetch any prerequisite types we may need to build this DIE type
23654 before building the type and calling set_die_type.
23655 * After building type call set_die_type for current DIE as soon as
23656 possible before fetching more types to complete the current type.
23657 * Make the type as complete as possible before fetching more types. */
23659 static struct type
*
23660 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23662 struct dwarf2_per_objfile
*dwarf2_per_objfile
23663 = cu
->per_cu
->dwarf2_per_objfile
;
23664 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23665 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23666 struct attribute
*attr
;
23667 struct dynamic_prop prop
;
23669 /* For Ada types, make sure that the gnat-specific data is always
23670 initialized (if not already set). There are a few types where
23671 we should not be doing so, because the type-specific area is
23672 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23673 where the type-specific area is used to store the floatformat).
23674 But this is not a problem, because the gnat-specific information
23675 is actually not needed for these types. */
23676 if (need_gnat_info (cu
)
23677 && type
->code () != TYPE_CODE_FUNC
23678 && type
->code () != TYPE_CODE_FLT
23679 && type
->code () != TYPE_CODE_METHODPTR
23680 && type
->code () != TYPE_CODE_MEMBERPTR
23681 && type
->code () != TYPE_CODE_METHOD
23682 && !HAVE_GNAT_AUX_INFO (type
))
23683 INIT_GNAT_SPECIFIC (type
);
23685 /* Read DW_AT_allocated and set in type. */
23686 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23687 if (attr
!= NULL
&& attr
->form_is_block ())
23689 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23690 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23691 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23693 else if (attr
!= NULL
)
23695 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23696 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23697 sect_offset_str (die
->sect_off
));
23700 /* Read DW_AT_associated and set in type. */
23701 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23702 if (attr
!= NULL
&& attr
->form_is_block ())
23704 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23705 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23706 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23708 else if (attr
!= NULL
)
23710 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23711 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23712 sect_offset_str (die
->sect_off
));
23715 /* Read DW_AT_data_location and set in type. */
23716 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23717 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23718 cu
->per_cu
->addr_type ()))
23719 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23721 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23722 dwarf2_per_objfile
->die_type_hash
23723 = htab_up (htab_create_alloc (127,
23724 per_cu_offset_and_type_hash
,
23725 per_cu_offset_and_type_eq
,
23726 NULL
, xcalloc
, xfree
));
23728 ofs
.per_cu
= cu
->per_cu
;
23729 ofs
.sect_off
= die
->sect_off
;
23731 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23732 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23734 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23735 sect_offset_str (die
->sect_off
));
23736 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23737 struct dwarf2_per_cu_offset_and_type
);
23742 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23743 or return NULL if the die does not have a saved type. */
23745 static struct type
*
23746 get_die_type_at_offset (sect_offset sect_off
,
23747 struct dwarf2_per_cu_data
*per_cu
)
23749 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23750 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23752 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23755 ofs
.per_cu
= per_cu
;
23756 ofs
.sect_off
= sect_off
;
23757 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23758 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23765 /* Look up the type for DIE in CU in die_type_hash,
23766 or return NULL if DIE does not have a saved type. */
23768 static struct type
*
23769 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23771 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23774 /* Add a dependence relationship from CU to REF_PER_CU. */
23777 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23778 struct dwarf2_per_cu_data
*ref_per_cu
)
23782 if (cu
->dependencies
== NULL
)
23784 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23785 NULL
, &cu
->comp_unit_obstack
,
23786 hashtab_obstack_allocate
,
23787 dummy_obstack_deallocate
);
23789 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23791 *slot
= ref_per_cu
;
23794 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23795 Set the mark field in every compilation unit in the
23796 cache that we must keep because we are keeping CU. */
23799 dwarf2_mark_helper (void **slot
, void *data
)
23801 struct dwarf2_per_cu_data
*per_cu
;
23803 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23805 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23806 reading of the chain. As such dependencies remain valid it is not much
23807 useful to track and undo them during QUIT cleanups. */
23808 if (per_cu
->cu
== NULL
)
23811 if (per_cu
->cu
->mark
)
23813 per_cu
->cu
->mark
= true;
23815 if (per_cu
->cu
->dependencies
!= NULL
)
23816 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23821 /* Set the mark field in CU and in every other compilation unit in the
23822 cache that we must keep because we are keeping CU. */
23825 dwarf2_mark (struct dwarf2_cu
*cu
)
23830 if (cu
->dependencies
!= NULL
)
23831 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23835 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23839 per_cu
->cu
->mark
= false;
23840 per_cu
= per_cu
->cu
->read_in_chain
;
23844 /* Trivial hash function for partial_die_info: the hash value of a DIE
23845 is its offset in .debug_info for this objfile. */
23848 partial_die_hash (const void *item
)
23850 const struct partial_die_info
*part_die
23851 = (const struct partial_die_info
*) item
;
23853 return to_underlying (part_die
->sect_off
);
23856 /* Trivial comparison function for partial_die_info structures: two DIEs
23857 are equal if they have the same offset. */
23860 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23862 const struct partial_die_info
*part_die_lhs
23863 = (const struct partial_die_info
*) item_lhs
;
23864 const struct partial_die_info
*part_die_rhs
23865 = (const struct partial_die_info
*) item_rhs
;
23867 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23870 struct cmd_list_element
*set_dwarf_cmdlist
;
23871 struct cmd_list_element
*show_dwarf_cmdlist
;
23874 show_check_physname (struct ui_file
*file
, int from_tty
,
23875 struct cmd_list_element
*c
, const char *value
)
23877 fprintf_filtered (file
,
23878 _("Whether to check \"physname\" is %s.\n"),
23882 void _initialize_dwarf2_read ();
23884 _initialize_dwarf2_read ()
23886 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23887 Set DWARF specific variables.\n\
23888 Configure DWARF variables such as the cache size."),
23889 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23890 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23892 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23893 Show DWARF specific variables.\n\
23894 Show DWARF variables such as the cache size."),
23895 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23896 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23898 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23899 &dwarf_max_cache_age
, _("\
23900 Set the upper bound on the age of cached DWARF compilation units."), _("\
23901 Show the upper bound on the age of cached DWARF compilation units."), _("\
23902 A higher limit means that cached compilation units will be stored\n\
23903 in memory longer, and more total memory will be used. Zero disables\n\
23904 caching, which can slow down startup."),
23906 show_dwarf_max_cache_age
,
23907 &set_dwarf_cmdlist
,
23908 &show_dwarf_cmdlist
);
23910 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23911 Set debugging of the DWARF reader."), _("\
23912 Show debugging of the DWARF reader."), _("\
23913 When enabled (non-zero), debugging messages are printed during DWARF\n\
23914 reading and symtab expansion. A value of 1 (one) provides basic\n\
23915 information. A value greater than 1 provides more verbose information."),
23918 &setdebuglist
, &showdebuglist
);
23920 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23921 Set debugging of the DWARF DIE reader."), _("\
23922 Show debugging of the DWARF DIE reader."), _("\
23923 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23924 The value is the maximum depth to print."),
23927 &setdebuglist
, &showdebuglist
);
23929 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23930 Set debugging of the dwarf line reader."), _("\
23931 Show debugging of the dwarf line reader."), _("\
23932 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23933 A value of 1 (one) provides basic information.\n\
23934 A value greater than 1 provides more verbose information."),
23937 &setdebuglist
, &showdebuglist
);
23939 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23940 Set cross-checking of \"physname\" code against demangler."), _("\
23941 Show cross-checking of \"physname\" code against demangler."), _("\
23942 When enabled, GDB's internal \"physname\" code is checked against\n\
23944 NULL
, show_check_physname
,
23945 &setdebuglist
, &showdebuglist
);
23947 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23948 no_class
, &use_deprecated_index_sections
, _("\
23949 Set whether to use deprecated gdb_index sections."), _("\
23950 Show whether to use deprecated gdb_index sections."), _("\
23951 When enabled, deprecated .gdb_index sections are used anyway.\n\
23952 Normally they are ignored either because of a missing feature or\n\
23953 performance issue.\n\
23954 Warning: This option must be enabled before gdb reads the file."),
23957 &setlist
, &showlist
);
23959 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23960 &dwarf2_locexpr_funcs
);
23961 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23962 &dwarf2_loclist_funcs
);
23964 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23965 &dwarf2_block_frame_base_locexpr_funcs
);
23966 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23967 &dwarf2_block_frame_base_loclist_funcs
);
23970 selftests::register_test ("dw2_expand_symtabs_matching",
23971 selftests::dw2_expand_symtabs_matching::run_test
);
23972 selftests::register_test ("dwarf2_find_containing_comp_unit",
23973 selftests::find_containing_comp_unit::run_test
);