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 the obstack, so we don't
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 the dwarf2_per_objfile
2412 obstack, and constructed with the specified field values. */
2414 static dwarf2_per_cu_data
*
2415 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2416 struct dwarf2_section_info
*section
,
2418 sect_offset sect_off
, ULONGEST length
)
2420 dwarf2_per_cu_data
*the_cu
2421 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
2422 struct dwarf2_per_cu_data
);
2423 the_cu
->sect_off
= sect_off
;
2424 the_cu
->length
= length
;
2425 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2426 the_cu
->section
= section
;
2427 the_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
2428 struct dwarf2_per_cu_quick_data
);
2429 the_cu
->is_dwz
= is_dwz
;
2433 /* A helper for create_cus_from_index that handles a given list of
2437 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2438 const gdb_byte
*cu_list
, offset_type n_elements
,
2439 struct dwarf2_section_info
*section
,
2442 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2444 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2446 sect_offset sect_off
2447 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2448 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2451 dwarf2_per_cu_data
*per_cu
2452 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2454 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2458 /* Read the CU list from the mapped index, and use it to create all
2459 the CU objects for this objfile. */
2462 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2463 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2464 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2466 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2467 dwarf2_per_objfile
->all_comp_units
.reserve
2468 ((cu_list_elements
+ dwz_elements
) / 2);
2470 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2471 &dwarf2_per_objfile
->info
, 0);
2473 if (dwz_elements
== 0)
2476 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2477 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2481 /* Create the signatured type hash table from the index. */
2484 create_signatured_type_table_from_index
2485 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2486 struct dwarf2_section_info
*section
,
2487 const gdb_byte
*bytes
,
2488 offset_type elements
)
2490 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2491 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2493 htab_up sig_types_hash
= allocate_signatured_type_table ();
2495 for (offset_type i
= 0; i
< elements
; i
+= 3)
2497 struct signatured_type
*sig_type
;
2500 cu_offset type_offset_in_tu
;
2502 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2503 sect_offset sect_off
2504 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2506 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2508 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2511 sig_type
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
2512 struct signatured_type
);
2513 sig_type
->signature
= signature
;
2514 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2515 sig_type
->per_cu
.is_debug_types
= 1;
2516 sig_type
->per_cu
.section
= section
;
2517 sig_type
->per_cu
.sect_off
= sect_off
;
2518 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2519 sig_type
->per_cu
.v
.quick
2520 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
2521 struct dwarf2_per_cu_quick_data
);
2523 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2526 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2529 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2532 /* Create the signatured type hash table from .debug_names. */
2535 create_signatured_type_table_from_debug_names
2536 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2537 const mapped_debug_names
&map
,
2538 struct dwarf2_section_info
*section
,
2539 struct dwarf2_section_info
*abbrev_section
)
2541 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2543 section
->read (objfile
);
2544 abbrev_section
->read (objfile
);
2546 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2547 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2549 htab_up sig_types_hash
= allocate_signatured_type_table ();
2551 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2553 struct signatured_type
*sig_type
;
2556 sect_offset sect_off
2557 = (sect_offset
) (extract_unsigned_integer
2558 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2560 map
.dwarf5_byte_order
));
2562 comp_unit_head cu_header
;
2563 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2565 section
->buffer
+ to_underlying (sect_off
),
2568 sig_type
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
2569 struct signatured_type
);
2570 sig_type
->signature
= cu_header
.signature
;
2571 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2572 sig_type
->per_cu
.is_debug_types
= 1;
2573 sig_type
->per_cu
.section
= section
;
2574 sig_type
->per_cu
.sect_off
= sect_off
;
2575 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2576 sig_type
->per_cu
.v
.quick
2577 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
2578 struct dwarf2_per_cu_quick_data
);
2580 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2583 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2586 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2589 /* Read the address map data from the mapped index, and use it to
2590 populate the objfile's psymtabs_addrmap. */
2593 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2594 struct mapped_index
*index
)
2596 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2597 struct gdbarch
*gdbarch
= objfile
->arch ();
2598 const gdb_byte
*iter
, *end
;
2599 struct addrmap
*mutable_map
;
2602 auto_obstack temp_obstack
;
2604 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2606 iter
= index
->address_table
.data ();
2607 end
= iter
+ index
->address_table
.size ();
2609 baseaddr
= objfile
->text_section_offset ();
2613 ULONGEST hi
, lo
, cu_index
;
2614 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2616 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2618 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2623 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2624 hex_string (lo
), hex_string (hi
));
2628 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2630 complaint (_(".gdb_index address table has invalid CU number %u"),
2631 (unsigned) cu_index
);
2635 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2636 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2637 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2638 dwarf2_per_objfile
->get_cu (cu_index
));
2641 objfile
->partial_symtabs
->psymtabs_addrmap
2642 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2645 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2646 populate the objfile's psymtabs_addrmap. */
2649 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2650 struct dwarf2_section_info
*section
)
2652 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2653 bfd
*abfd
= objfile
->obfd
;
2654 struct gdbarch
*gdbarch
= objfile
->arch ();
2655 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2657 auto_obstack temp_obstack
;
2658 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2660 std::unordered_map
<sect_offset
,
2661 dwarf2_per_cu_data
*,
2662 gdb::hash_enum
<sect_offset
>>
2663 debug_info_offset_to_per_cu
;
2664 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2666 const auto insertpair
2667 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2668 if (!insertpair
.second
)
2670 warning (_("Section .debug_aranges in %s has duplicate "
2671 "debug_info_offset %s, ignoring .debug_aranges."),
2672 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2677 section
->read (objfile
);
2679 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2681 const gdb_byte
*addr
= section
->buffer
;
2683 while (addr
< section
->buffer
+ section
->size
)
2685 const gdb_byte
*const entry_addr
= addr
;
2686 unsigned int bytes_read
;
2688 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2692 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2693 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2694 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2695 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2697 warning (_("Section .debug_aranges in %s entry at offset %s "
2698 "length %s exceeds section length %s, "
2699 "ignoring .debug_aranges."),
2700 objfile_name (objfile
),
2701 plongest (entry_addr
- section
->buffer
),
2702 plongest (bytes_read
+ entry_length
),
2703 pulongest (section
->size
));
2707 /* The version number. */
2708 const uint16_t version
= read_2_bytes (abfd
, addr
);
2712 warning (_("Section .debug_aranges in %s entry at offset %s "
2713 "has unsupported version %d, ignoring .debug_aranges."),
2714 objfile_name (objfile
),
2715 plongest (entry_addr
- section
->buffer
), version
);
2719 const uint64_t debug_info_offset
2720 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2721 addr
+= offset_size
;
2722 const auto per_cu_it
2723 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2724 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2726 warning (_("Section .debug_aranges in %s entry at offset %s "
2727 "debug_info_offset %s does not exists, "
2728 "ignoring .debug_aranges."),
2729 objfile_name (objfile
),
2730 plongest (entry_addr
- section
->buffer
),
2731 pulongest (debug_info_offset
));
2734 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2736 const uint8_t address_size
= *addr
++;
2737 if (address_size
< 1 || address_size
> 8)
2739 warning (_("Section .debug_aranges in %s entry at offset %s "
2740 "address_size %u is invalid, ignoring .debug_aranges."),
2741 objfile_name (objfile
),
2742 plongest (entry_addr
- section
->buffer
), address_size
);
2746 const uint8_t segment_selector_size
= *addr
++;
2747 if (segment_selector_size
!= 0)
2749 warning (_("Section .debug_aranges in %s entry at offset %s "
2750 "segment_selector_size %u is not supported, "
2751 "ignoring .debug_aranges."),
2752 objfile_name (objfile
),
2753 plongest (entry_addr
- section
->buffer
),
2754 segment_selector_size
);
2758 /* Must pad to an alignment boundary that is twice the address
2759 size. It is undocumented by the DWARF standard but GCC does
2761 for (size_t padding
= ((-(addr
- section
->buffer
))
2762 & (2 * address_size
- 1));
2763 padding
> 0; padding
--)
2766 warning (_("Section .debug_aranges in %s entry at offset %s "
2767 "padding is not zero, ignoring .debug_aranges."),
2768 objfile_name (objfile
),
2769 plongest (entry_addr
- section
->buffer
));
2775 if (addr
+ 2 * address_size
> entry_end
)
2777 warning (_("Section .debug_aranges in %s entry at offset %s "
2778 "address list is not properly terminated, "
2779 "ignoring .debug_aranges."),
2780 objfile_name (objfile
),
2781 plongest (entry_addr
- section
->buffer
));
2784 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2786 addr
+= address_size
;
2787 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2789 addr
+= address_size
;
2790 if (start
== 0 && length
== 0)
2792 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
2794 /* Symbol was eliminated due to a COMDAT group. */
2797 ULONGEST end
= start
+ length
;
2798 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2800 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2802 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2806 objfile
->partial_symtabs
->psymtabs_addrmap
2807 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2810 /* Find a slot in the mapped index INDEX for the object named NAME.
2811 If NAME is found, set *VEC_OUT to point to the CU vector in the
2812 constant pool and return true. If NAME cannot be found, return
2816 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2817 offset_type
**vec_out
)
2820 offset_type slot
, step
;
2821 int (*cmp
) (const char *, const char *);
2823 gdb::unique_xmalloc_ptr
<char> without_params
;
2824 if (current_language
->la_language
== language_cplus
2825 || current_language
->la_language
== language_fortran
2826 || current_language
->la_language
== language_d
)
2828 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2831 if (strchr (name
, '(') != NULL
)
2833 without_params
= cp_remove_params (name
);
2835 if (without_params
!= NULL
)
2836 name
= without_params
.get ();
2840 /* Index version 4 did not support case insensitive searches. But the
2841 indices for case insensitive languages are built in lowercase, therefore
2842 simulate our NAME being searched is also lowercased. */
2843 hash
= mapped_index_string_hash ((index
->version
== 4
2844 && case_sensitivity
== case_sensitive_off
2845 ? 5 : index
->version
),
2848 slot
= hash
& (index
->symbol_table
.size () - 1);
2849 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2850 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2856 const auto &bucket
= index
->symbol_table
[slot
];
2857 if (bucket
.name
== 0 && bucket
.vec
== 0)
2860 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2861 if (!cmp (name
, str
))
2863 *vec_out
= (offset_type
*) (index
->constant_pool
2864 + MAYBE_SWAP (bucket
.vec
));
2868 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2872 /* A helper function that reads the .gdb_index from BUFFER and fills
2873 in MAP. FILENAME is the name of the file containing the data;
2874 it is used for error reporting. DEPRECATED_OK is true if it is
2875 ok to use deprecated sections.
2877 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2878 out parameters that are filled in with information about the CU and
2879 TU lists in the section.
2881 Returns true if all went well, false otherwise. */
2884 read_gdb_index_from_buffer (const char *filename
,
2886 gdb::array_view
<const gdb_byte
> buffer
,
2887 struct mapped_index
*map
,
2888 const gdb_byte
**cu_list
,
2889 offset_type
*cu_list_elements
,
2890 const gdb_byte
**types_list
,
2891 offset_type
*types_list_elements
)
2893 const gdb_byte
*addr
= &buffer
[0];
2895 /* Version check. */
2896 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2897 /* Versions earlier than 3 emitted every copy of a psymbol. This
2898 causes the index to behave very poorly for certain requests. Version 3
2899 contained incomplete addrmap. So, it seems better to just ignore such
2903 static int warning_printed
= 0;
2904 if (!warning_printed
)
2906 warning (_("Skipping obsolete .gdb_index section in %s."),
2908 warning_printed
= 1;
2912 /* Index version 4 uses a different hash function than index version
2915 Versions earlier than 6 did not emit psymbols for inlined
2916 functions. Using these files will cause GDB not to be able to
2917 set breakpoints on inlined functions by name, so we ignore these
2918 indices unless the user has done
2919 "set use-deprecated-index-sections on". */
2920 if (version
< 6 && !deprecated_ok
)
2922 static int warning_printed
= 0;
2923 if (!warning_printed
)
2926 Skipping deprecated .gdb_index section in %s.\n\
2927 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2928 to use the section anyway."),
2930 warning_printed
= 1;
2934 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2935 of the TU (for symbols coming from TUs),
2936 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2937 Plus gold-generated indices can have duplicate entries for global symbols,
2938 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2939 These are just performance bugs, and we can't distinguish gdb-generated
2940 indices from gold-generated ones, so issue no warning here. */
2942 /* Indexes with higher version than the one supported by GDB may be no
2943 longer backward compatible. */
2947 map
->version
= version
;
2949 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2952 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2953 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2957 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2958 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2959 - MAYBE_SWAP (metadata
[i
]))
2963 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2964 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2966 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2969 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2970 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2972 = gdb::array_view
<mapped_index::symbol_table_slot
>
2973 ((mapped_index::symbol_table_slot
*) symbol_table
,
2974 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2977 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2982 /* Callback types for dwarf2_read_gdb_index. */
2984 typedef gdb::function_view
2985 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
2986 get_gdb_index_contents_ftype
;
2987 typedef gdb::function_view
2988 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
2989 get_gdb_index_contents_dwz_ftype
;
2991 /* Read .gdb_index. If everything went ok, initialize the "quick"
2992 elements of all the CUs and return 1. Otherwise, return 0. */
2995 dwarf2_read_gdb_index
2996 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2997 get_gdb_index_contents_ftype get_gdb_index_contents
,
2998 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3000 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3001 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3002 struct dwz_file
*dwz
;
3003 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3005 gdb::array_view
<const gdb_byte
> main_index_contents
3006 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3008 if (main_index_contents
.empty ())
3011 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3012 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3013 use_deprecated_index_sections
,
3014 main_index_contents
, map
.get (), &cu_list
,
3015 &cu_list_elements
, &types_list
,
3016 &types_list_elements
))
3019 /* Don't use the index if it's empty. */
3020 if (map
->symbol_table
.empty ())
3023 /* If there is a .dwz file, read it so we can get its CU list as
3025 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3028 struct mapped_index dwz_map
;
3029 const gdb_byte
*dwz_types_ignore
;
3030 offset_type dwz_types_elements_ignore
;
3032 gdb::array_view
<const gdb_byte
> dwz_index_content
3033 = get_gdb_index_contents_dwz (objfile
, dwz
);
3035 if (dwz_index_content
.empty ())
3038 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3039 1, dwz_index_content
, &dwz_map
,
3040 &dwz_list
, &dwz_list_elements
,
3042 &dwz_types_elements_ignore
))
3044 warning (_("could not read '.gdb_index' section from %s; skipping"),
3045 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3050 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3051 dwz_list
, dwz_list_elements
);
3053 if (types_list_elements
)
3055 /* We can only handle a single .debug_types when we have an
3057 if (dwarf2_per_objfile
->types
.size () != 1)
3060 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3062 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3063 types_list
, types_list_elements
);
3066 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3068 dwarf2_per_objfile
->index_table
= std::move (map
);
3069 dwarf2_per_objfile
->using_index
= 1;
3070 dwarf2_per_objfile
->quick_file_names_table
=
3071 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3076 /* die_reader_func for dw2_get_file_names. */
3079 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3080 const gdb_byte
*info_ptr
,
3081 struct die_info
*comp_unit_die
)
3083 struct dwarf2_cu
*cu
= reader
->cu
;
3084 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3085 struct dwarf2_per_objfile
*dwarf2_per_objfile
3086 = cu
->per_cu
->dwarf2_per_objfile
;
3087 struct dwarf2_per_cu_data
*lh_cu
;
3088 struct attribute
*attr
;
3090 struct quick_file_names
*qfn
;
3092 gdb_assert (! this_cu
->is_debug_types
);
3094 /* Our callers never want to match partial units -- instead they
3095 will match the enclosing full CU. */
3096 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3098 this_cu
->v
.quick
->no_file_data
= 1;
3106 sect_offset line_offset
{};
3108 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3109 if (attr
!= nullptr)
3111 struct quick_file_names find_entry
;
3113 line_offset
= (sect_offset
) DW_UNSND (attr
);
3115 /* We may have already read in this line header (TU line header sharing).
3116 If we have we're done. */
3117 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3118 find_entry
.hash
.line_sect_off
= line_offset
;
3119 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
.get (),
3120 &find_entry
, INSERT
);
3123 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3127 lh
= dwarf_decode_line_header (line_offset
, cu
);
3131 lh_cu
->v
.quick
->no_file_data
= 1;
3135 qfn
= XOBNEW (&dwarf2_per_objfile
->obstack
, struct quick_file_names
);
3136 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3137 qfn
->hash
.line_sect_off
= line_offset
;
3138 gdb_assert (slot
!= NULL
);
3141 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3144 if (strcmp (fnd
.name
, "<unknown>") != 0)
3147 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3149 XOBNEWVEC (&dwarf2_per_objfile
->obstack
, const char *,
3150 qfn
->num_file_names
);
3152 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3153 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3154 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3155 fnd
.comp_dir
).release ();
3156 qfn
->real_names
= NULL
;
3158 lh_cu
->v
.quick
->file_names
= qfn
;
3161 /* A helper for the "quick" functions which attempts to read the line
3162 table for THIS_CU. */
3164 static struct quick_file_names
*
3165 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3167 /* This should never be called for TUs. */
3168 gdb_assert (! this_cu
->is_debug_types
);
3169 /* Nor type unit groups. */
3170 gdb_assert (! this_cu
->type_unit_group_p ());
3172 if (this_cu
->v
.quick
->file_names
!= NULL
)
3173 return this_cu
->v
.quick
->file_names
;
3174 /* If we know there is no line data, no point in looking again. */
3175 if (this_cu
->v
.quick
->no_file_data
)
3178 cutu_reader
reader (this_cu
);
3179 if (!reader
.dummy_p
)
3180 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3182 if (this_cu
->v
.quick
->no_file_data
)
3184 return this_cu
->v
.quick
->file_names
;
3187 /* A helper for the "quick" functions which computes and caches the
3188 real path for a given file name from the line table. */
3191 dw2_get_real_path (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3192 struct quick_file_names
*qfn
, int index
)
3194 if (qfn
->real_names
== NULL
)
3195 qfn
->real_names
= OBSTACK_CALLOC (&dwarf2_per_objfile
->obstack
,
3196 qfn
->num_file_names
, const char *);
3198 if (qfn
->real_names
[index
] == NULL
)
3199 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3201 return qfn
->real_names
[index
];
3204 static struct symtab
*
3205 dw2_find_last_source_symtab (struct objfile
*objfile
)
3207 struct dwarf2_per_objfile
*dwarf2_per_objfile
3208 = get_dwarf2_per_objfile (objfile
);
3209 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3210 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3215 return compunit_primary_filetab (cust
);
3218 /* Traversal function for dw2_forget_cached_source_info. */
3221 dw2_free_cached_file_names (void **slot
, void *info
)
3223 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3225 if (file_data
->real_names
)
3229 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3231 xfree ((void*) file_data
->real_names
[i
]);
3232 file_data
->real_names
[i
] = NULL
;
3240 dw2_forget_cached_source_info (struct objfile
*objfile
)
3242 struct dwarf2_per_objfile
*dwarf2_per_objfile
3243 = get_dwarf2_per_objfile (objfile
);
3245 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
.get (),
3246 dw2_free_cached_file_names
, NULL
);
3249 /* Helper function for dw2_map_symtabs_matching_filename that expands
3250 the symtabs and calls the iterator. */
3253 dw2_map_expand_apply (struct objfile
*objfile
,
3254 struct dwarf2_per_cu_data
*per_cu
,
3255 const char *name
, const char *real_path
,
3256 gdb::function_view
<bool (symtab
*)> callback
)
3258 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3260 /* Don't visit already-expanded CUs. */
3261 if (per_cu
->v
.quick
->compunit_symtab
)
3264 /* This may expand more than one symtab, and we want to iterate over
3266 dw2_instantiate_symtab (per_cu
, false);
3268 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3269 last_made
, callback
);
3272 /* Implementation of the map_symtabs_matching_filename method. */
3275 dw2_map_symtabs_matching_filename
3276 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3277 gdb::function_view
<bool (symtab
*)> callback
)
3279 const char *name_basename
= lbasename (name
);
3280 struct dwarf2_per_objfile
*dwarf2_per_objfile
3281 = get_dwarf2_per_objfile (objfile
);
3283 /* The rule is CUs specify all the files, including those used by
3284 any TU, so there's no need to scan TUs here. */
3286 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3288 /* We only need to look at symtabs not already expanded. */
3289 if (per_cu
->v
.quick
->compunit_symtab
)
3292 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3293 if (file_data
== NULL
)
3296 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3298 const char *this_name
= file_data
->file_names
[j
];
3299 const char *this_real_name
;
3301 if (compare_filenames_for_search (this_name
, name
))
3303 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3309 /* Before we invoke realpath, which can get expensive when many
3310 files are involved, do a quick comparison of the basenames. */
3311 if (! basenames_may_differ
3312 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3315 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
3317 if (compare_filenames_for_search (this_real_name
, name
))
3319 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3325 if (real_path
!= NULL
)
3327 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3328 gdb_assert (IS_ABSOLUTE_PATH (name
));
3329 if (this_real_name
!= NULL
3330 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3332 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3344 /* Struct used to manage iterating over all CUs looking for a symbol. */
3346 struct dw2_symtab_iterator
3348 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3349 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3350 /* If set, only look for symbols that match that block. Valid values are
3351 GLOBAL_BLOCK and STATIC_BLOCK. */
3352 gdb::optional
<block_enum
> block_index
;
3353 /* The kind of symbol we're looking for. */
3355 /* The list of CUs from the index entry of the symbol,
3356 or NULL if not found. */
3358 /* The next element in VEC to look at. */
3360 /* The number of elements in VEC, or zero if there is no match. */
3362 /* Have we seen a global version of the symbol?
3363 If so we can ignore all further global instances.
3364 This is to work around gold/15646, inefficient gold-generated
3369 /* Initialize the index symtab iterator ITER. */
3372 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3373 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3374 gdb::optional
<block_enum
> block_index
,
3378 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3379 iter
->block_index
= block_index
;
3380 iter
->domain
= domain
;
3382 iter
->global_seen
= 0;
3384 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3386 /* index is NULL if OBJF_READNOW. */
3387 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3388 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3396 /* Return the next matching CU or NULL if there are no more. */
3398 static struct dwarf2_per_cu_data
*
3399 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3401 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3403 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3405 offset_type cu_index_and_attrs
=
3406 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3407 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3408 gdb_index_symbol_kind symbol_kind
=
3409 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3410 /* Only check the symbol attributes if they're present.
3411 Indices prior to version 7 don't record them,
3412 and indices >= 7 may elide them for certain symbols
3413 (gold does this). */
3415 (dwarf2_per_objfile
->index_table
->version
>= 7
3416 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3418 /* Don't crash on bad data. */
3419 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3420 + dwarf2_per_objfile
->all_type_units
.size ()))
3422 complaint (_(".gdb_index entry has bad CU index"
3424 objfile_name (dwarf2_per_objfile
->objfile
));
3428 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3430 /* Skip if already read in. */
3431 if (per_cu
->v
.quick
->compunit_symtab
)
3434 /* Check static vs global. */
3437 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3439 if (iter
->block_index
.has_value ())
3441 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3443 if (is_static
!= want_static
)
3447 /* Work around gold/15646. */
3448 if (!is_static
&& iter
->global_seen
)
3451 iter
->global_seen
= 1;
3454 /* Only check the symbol's kind if it has one. */
3457 switch (iter
->domain
)
3460 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3461 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3462 /* Some types are also in VAR_DOMAIN. */
3463 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3467 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3471 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3475 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3490 static struct compunit_symtab
*
3491 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3492 const char *name
, domain_enum domain
)
3494 struct compunit_symtab
*stab_best
= NULL
;
3495 struct dwarf2_per_objfile
*dwarf2_per_objfile
3496 = get_dwarf2_per_objfile (objfile
);
3498 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3500 struct dw2_symtab_iterator iter
;
3501 struct dwarf2_per_cu_data
*per_cu
;
3503 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3505 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3507 struct symbol
*sym
, *with_opaque
= NULL
;
3508 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3509 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3510 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3512 sym
= block_find_symbol (block
, name
, domain
,
3513 block_find_non_opaque_type_preferred
,
3516 /* Some caution must be observed with overloaded functions
3517 and methods, since the index will not contain any overload
3518 information (but NAME might contain it). */
3521 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3523 if (with_opaque
!= NULL
3524 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3527 /* Keep looking through other CUs. */
3534 dw2_print_stats (struct objfile
*objfile
)
3536 struct dwarf2_per_objfile
*dwarf2_per_objfile
3537 = get_dwarf2_per_objfile (objfile
);
3538 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3539 + dwarf2_per_objfile
->all_type_units
.size ());
3542 for (int i
= 0; i
< total
; ++i
)
3544 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3546 if (!per_cu
->v
.quick
->compunit_symtab
)
3549 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3550 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3553 /* This dumps minimal information about the index.
3554 It is called via "mt print objfiles".
3555 One use is to verify .gdb_index has been loaded by the
3556 gdb.dwarf2/gdb-index.exp testcase. */
3559 dw2_dump (struct objfile
*objfile
)
3561 struct dwarf2_per_objfile
*dwarf2_per_objfile
3562 = get_dwarf2_per_objfile (objfile
);
3564 gdb_assert (dwarf2_per_objfile
->using_index
);
3565 printf_filtered (".gdb_index:");
3566 if (dwarf2_per_objfile
->index_table
!= NULL
)
3568 printf_filtered (" version %d\n",
3569 dwarf2_per_objfile
->index_table
->version
);
3572 printf_filtered (" faked for \"readnow\"\n");
3573 printf_filtered ("\n");
3577 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3578 const char *func_name
)
3580 struct dwarf2_per_objfile
*dwarf2_per_objfile
3581 = get_dwarf2_per_objfile (objfile
);
3583 struct dw2_symtab_iterator iter
;
3584 struct dwarf2_per_cu_data
*per_cu
;
3586 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3588 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3589 dw2_instantiate_symtab (per_cu
, false);
3594 dw2_expand_all_symtabs (struct objfile
*objfile
)
3596 struct dwarf2_per_objfile
*dwarf2_per_objfile
3597 = get_dwarf2_per_objfile (objfile
);
3598 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3599 + dwarf2_per_objfile
->all_type_units
.size ());
3601 for (int i
= 0; i
< total_units
; ++i
)
3603 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3605 /* We don't want to directly expand a partial CU, because if we
3606 read it with the wrong language, then assertion failures can
3607 be triggered later on. See PR symtab/23010. So, tell
3608 dw2_instantiate_symtab to skip partial CUs -- any important
3609 partial CU will be read via DW_TAG_imported_unit anyway. */
3610 dw2_instantiate_symtab (per_cu
, true);
3615 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3616 const char *fullname
)
3618 struct dwarf2_per_objfile
*dwarf2_per_objfile
3619 = get_dwarf2_per_objfile (objfile
);
3621 /* We don't need to consider type units here.
3622 This is only called for examining code, e.g. expand_line_sal.
3623 There can be an order of magnitude (or more) more type units
3624 than comp units, and we avoid them if we can. */
3626 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3628 /* We only need to look at symtabs not already expanded. */
3629 if (per_cu
->v
.quick
->compunit_symtab
)
3632 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3633 if (file_data
== NULL
)
3636 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3638 const char *this_fullname
= file_data
->file_names
[j
];
3640 if (filename_cmp (this_fullname
, fullname
) == 0)
3642 dw2_instantiate_symtab (per_cu
, false);
3650 dw2_expand_symtabs_matching_symbol
3651 (mapped_index_base
&index
,
3652 const lookup_name_info
&lookup_name_in
,
3653 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3654 enum search_domain kind
,
3655 gdb::function_view
<bool (offset_type
)> match_callback
);
3658 dw2_expand_symtabs_matching_one
3659 (struct dwarf2_per_cu_data
*per_cu
,
3660 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3661 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3664 dw2_map_matching_symbols
3665 (struct objfile
*objfile
,
3666 const lookup_name_info
&name
, domain_enum domain
,
3668 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3669 symbol_compare_ftype
*ordered_compare
)
3672 struct dwarf2_per_objfile
*dwarf2_per_objfile
3673 = get_dwarf2_per_objfile (objfile
);
3675 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3677 if (dwarf2_per_objfile
->index_table
!= nullptr)
3679 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3680 here though if the current language is Ada for a non-Ada objfile
3682 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
3684 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3685 auto matcher
= [&] (const char *symname
)
3687 if (ordered_compare
== nullptr)
3689 return ordered_compare (symname
, match_name
) == 0;
3692 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3693 [&] (offset_type namei
)
3695 struct dw2_symtab_iterator iter
;
3696 struct dwarf2_per_cu_data
*per_cu
;
3698 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_kind
, domain
,
3700 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3701 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
3707 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3708 proceed assuming all symtabs have been read in. */
3711 for (compunit_symtab
*cust
: objfile
->compunits ())
3713 const struct block
*block
;
3717 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3718 if (!iterate_over_symbols_terminated (block
, name
,
3724 /* Starting from a search name, return the string that finds the upper
3725 bound of all strings that start with SEARCH_NAME in a sorted name
3726 list. Returns the empty string to indicate that the upper bound is
3727 the end of the list. */
3730 make_sort_after_prefix_name (const char *search_name
)
3732 /* When looking to complete "func", we find the upper bound of all
3733 symbols that start with "func" by looking for where we'd insert
3734 the closest string that would follow "func" in lexicographical
3735 order. Usually, that's "func"-with-last-character-incremented,
3736 i.e. "fund". Mind non-ASCII characters, though. Usually those
3737 will be UTF-8 multi-byte sequences, but we can't be certain.
3738 Especially mind the 0xff character, which is a valid character in
3739 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3740 rule out compilers allowing it in identifiers. Note that
3741 conveniently, strcmp/strcasecmp are specified to compare
3742 characters interpreted as unsigned char. So what we do is treat
3743 the whole string as a base 256 number composed of a sequence of
3744 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3745 to 0, and carries 1 to the following more-significant position.
3746 If the very first character in SEARCH_NAME ends up incremented
3747 and carries/overflows, then the upper bound is the end of the
3748 list. The string after the empty string is also the empty
3751 Some examples of this operation:
3753 SEARCH_NAME => "+1" RESULT
3757 "\xff" "a" "\xff" => "\xff" "b"
3762 Then, with these symbols for example:
3768 completing "func" looks for symbols between "func" and
3769 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3770 which finds "func" and "func1", but not "fund".
3774 funcÿ (Latin1 'ÿ' [0xff])
3778 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3779 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3783 ÿÿ (Latin1 'ÿ' [0xff])
3786 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3787 the end of the list.
3789 std::string after
= search_name
;
3790 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3792 if (!after
.empty ())
3793 after
.back () = (unsigned char) after
.back () + 1;
3797 /* See declaration. */
3799 std::pair
<std::vector
<name_component
>::const_iterator
,
3800 std::vector
<name_component
>::const_iterator
>
3801 mapped_index_base::find_name_components_bounds
3802 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3805 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3807 const char *lang_name
3808 = lookup_name_without_params
.language_lookup_name (lang
);
3810 /* Comparison function object for lower_bound that matches against a
3811 given symbol name. */
3812 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3815 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3816 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3817 return name_cmp (elem_name
, name
) < 0;
3820 /* Comparison function object for upper_bound that matches against a
3821 given symbol name. */
3822 auto lookup_compare_upper
= [&] (const char *name
,
3823 const name_component
&elem
)
3825 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3826 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3827 return name_cmp (name
, elem_name
) < 0;
3830 auto begin
= this->name_components
.begin ();
3831 auto end
= this->name_components
.end ();
3833 /* Find the lower bound. */
3836 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3839 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3842 /* Find the upper bound. */
3845 if (lookup_name_without_params
.completion_mode ())
3847 /* In completion mode, we want UPPER to point past all
3848 symbols names that have the same prefix. I.e., with
3849 these symbols, and completing "func":
3851 function << lower bound
3853 other_function << upper bound
3855 We find the upper bound by looking for the insertion
3856 point of "func"-with-last-character-incremented,
3858 std::string after
= make_sort_after_prefix_name (lang_name
);
3861 return std::lower_bound (lower
, end
, after
.c_str (),
3862 lookup_compare_lower
);
3865 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3868 return {lower
, upper
};
3871 /* See declaration. */
3874 mapped_index_base::build_name_components ()
3876 if (!this->name_components
.empty ())
3879 this->name_components_casing
= case_sensitivity
;
3881 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3883 /* The code below only knows how to break apart components of C++
3884 symbol names (and other languages that use '::' as
3885 namespace/module separator) and Ada symbol names. */
3886 auto count
= this->symbol_name_count ();
3887 for (offset_type idx
= 0; idx
< count
; idx
++)
3889 if (this->symbol_name_slot_invalid (idx
))
3892 const char *name
= this->symbol_name_at (idx
);
3894 /* Add each name component to the name component table. */
3895 unsigned int previous_len
= 0;
3897 if (strstr (name
, "::") != nullptr)
3899 for (unsigned int current_len
= cp_find_first_component (name
);
3900 name
[current_len
] != '\0';
3901 current_len
+= cp_find_first_component (name
+ current_len
))
3903 gdb_assert (name
[current_len
] == ':');
3904 this->name_components
.push_back ({previous_len
, idx
});
3905 /* Skip the '::'. */
3907 previous_len
= current_len
;
3912 /* Handle the Ada encoded (aka mangled) form here. */
3913 for (const char *iter
= strstr (name
, "__");
3915 iter
= strstr (iter
, "__"))
3917 this->name_components
.push_back ({previous_len
, idx
});
3919 previous_len
= iter
- name
;
3923 this->name_components
.push_back ({previous_len
, idx
});
3926 /* Sort name_components elements by name. */
3927 auto name_comp_compare
= [&] (const name_component
&left
,
3928 const name_component
&right
)
3930 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3931 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3933 const char *left_name
= left_qualified
+ left
.name_offset
;
3934 const char *right_name
= right_qualified
+ right
.name_offset
;
3936 return name_cmp (left_name
, right_name
) < 0;
3939 std::sort (this->name_components
.begin (),
3940 this->name_components
.end (),
3944 /* Helper for dw2_expand_symtabs_matching that works with a
3945 mapped_index_base instead of the containing objfile. This is split
3946 to a separate function in order to be able to unit test the
3947 name_components matching using a mock mapped_index_base. For each
3948 symbol name that matches, calls MATCH_CALLBACK, passing it the
3949 symbol's index in the mapped_index_base symbol table. */
3952 dw2_expand_symtabs_matching_symbol
3953 (mapped_index_base
&index
,
3954 const lookup_name_info
&lookup_name_in
,
3955 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3956 enum search_domain kind
,
3957 gdb::function_view
<bool (offset_type
)> match_callback
)
3959 lookup_name_info lookup_name_without_params
3960 = lookup_name_in
.make_ignore_params ();
3962 /* Build the symbol name component sorted vector, if we haven't
3964 index
.build_name_components ();
3966 /* The same symbol may appear more than once in the range though.
3967 E.g., if we're looking for symbols that complete "w", and we have
3968 a symbol named "w1::w2", we'll find the two name components for
3969 that same symbol in the range. To be sure we only call the
3970 callback once per symbol, we first collect the symbol name
3971 indexes that matched in a temporary vector and ignore
3973 std::vector
<offset_type
> matches
;
3975 struct name_and_matcher
3977 symbol_name_matcher_ftype
*matcher
;
3980 bool operator== (const name_and_matcher
&other
) const
3982 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
3986 /* A vector holding all the different symbol name matchers, for all
3988 std::vector
<name_and_matcher
> matchers
;
3990 for (int i
= 0; i
< nr_languages
; i
++)
3992 enum language lang_e
= (enum language
) i
;
3994 const language_defn
*lang
= language_def (lang_e
);
3995 symbol_name_matcher_ftype
*name_matcher
3996 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
3998 name_and_matcher key
{
4000 lookup_name_without_params
.language_lookup_name (lang_e
)
4003 /* Don't insert the same comparison routine more than once.
4004 Note that we do this linear walk. This is not a problem in
4005 practice because the number of supported languages is
4007 if (std::find (matchers
.begin (), matchers
.end (), key
)
4010 matchers
.push_back (std::move (key
));
4013 = index
.find_name_components_bounds (lookup_name_without_params
,
4016 /* Now for each symbol name in range, check to see if we have a name
4017 match, and if so, call the MATCH_CALLBACK callback. */
4019 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4021 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4023 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4024 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4027 matches
.push_back (bounds
.first
->idx
);
4031 std::sort (matches
.begin (), matches
.end ());
4033 /* Finally call the callback, once per match. */
4035 for (offset_type idx
: matches
)
4039 if (!match_callback (idx
))
4045 /* Above we use a type wider than idx's for 'prev', since 0 and
4046 (offset_type)-1 are both possible values. */
4047 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4052 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4054 /* A mock .gdb_index/.debug_names-like name index table, enough to
4055 exercise dw2_expand_symtabs_matching_symbol, which works with the
4056 mapped_index_base interface. Builds an index from the symbol list
4057 passed as parameter to the constructor. */
4058 class mock_mapped_index
: public mapped_index_base
4061 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4062 : m_symbol_table (symbols
)
4065 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4067 /* Return the number of names in the symbol table. */
4068 size_t symbol_name_count () const override
4070 return m_symbol_table
.size ();
4073 /* Get the name of the symbol at IDX in the symbol table. */
4074 const char *symbol_name_at (offset_type idx
) const override
4076 return m_symbol_table
[idx
];
4080 gdb::array_view
<const char *> m_symbol_table
;
4083 /* Convenience function that converts a NULL pointer to a "<null>"
4084 string, to pass to print routines. */
4087 string_or_null (const char *str
)
4089 return str
!= NULL
? str
: "<null>";
4092 /* Check if a lookup_name_info built from
4093 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4094 index. EXPECTED_LIST is the list of expected matches, in expected
4095 matching order. If no match expected, then an empty list is
4096 specified. Returns true on success. On failure prints a warning
4097 indicating the file:line that failed, and returns false. */
4100 check_match (const char *file
, int line
,
4101 mock_mapped_index
&mock_index
,
4102 const char *name
, symbol_name_match_type match_type
,
4103 bool completion_mode
,
4104 std::initializer_list
<const char *> expected_list
)
4106 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4108 bool matched
= true;
4110 auto mismatch
= [&] (const char *expected_str
,
4113 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4114 "expected=\"%s\", got=\"%s\"\n"),
4116 (match_type
== symbol_name_match_type::FULL
4118 name
, string_or_null (expected_str
), string_or_null (got
));
4122 auto expected_it
= expected_list
.begin ();
4123 auto expected_end
= expected_list
.end ();
4125 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4127 [&] (offset_type idx
)
4129 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4130 const char *expected_str
4131 = expected_it
== expected_end
? NULL
: *expected_it
++;
4133 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4134 mismatch (expected_str
, matched_name
);
4138 const char *expected_str
4139 = expected_it
== expected_end
? NULL
: *expected_it
++;
4140 if (expected_str
!= NULL
)
4141 mismatch (expected_str
, NULL
);
4146 /* The symbols added to the mock mapped_index for testing (in
4148 static const char *test_symbols
[] = {
4157 "ns2::tmpl<int>::foo2",
4158 "(anonymous namespace)::A::B::C",
4160 /* These are used to check that the increment-last-char in the
4161 matching algorithm for completion doesn't match "t1_fund" when
4162 completing "t1_func". */
4168 /* A UTF-8 name with multi-byte sequences to make sure that
4169 cp-name-parser understands this as a single identifier ("função"
4170 is "function" in PT). */
4173 /* \377 (0xff) is Latin1 'ÿ'. */
4176 /* \377 (0xff) is Latin1 'ÿ'. */
4180 /* A name with all sorts of complications. Starts with "z" to make
4181 it easier for the completion tests below. */
4182 #define Z_SYM_NAME \
4183 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4184 "::tuple<(anonymous namespace)::ui*, " \
4185 "std::default_delete<(anonymous namespace)::ui>, void>"
4190 /* Returns true if the mapped_index_base::find_name_component_bounds
4191 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4192 in completion mode. */
4195 check_find_bounds_finds (mapped_index_base
&index
,
4196 const char *search_name
,
4197 gdb::array_view
<const char *> expected_syms
)
4199 lookup_name_info
lookup_name (search_name
,
4200 symbol_name_match_type::FULL
, true);
4202 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4205 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4206 if (distance
!= expected_syms
.size ())
4209 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4211 auto nc_elem
= bounds
.first
+ exp_elem
;
4212 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4213 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4220 /* Test the lower-level mapped_index::find_name_component_bounds
4224 test_mapped_index_find_name_component_bounds ()
4226 mock_mapped_index
mock_index (test_symbols
);
4228 mock_index
.build_name_components ();
4230 /* Test the lower-level mapped_index::find_name_component_bounds
4231 method in completion mode. */
4233 static const char *expected_syms
[] = {
4238 SELF_CHECK (check_find_bounds_finds (mock_index
,
4239 "t1_func", expected_syms
));
4242 /* Check that the increment-last-char in the name matching algorithm
4243 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4245 static const char *expected_syms1
[] = {
4249 SELF_CHECK (check_find_bounds_finds (mock_index
,
4250 "\377", expected_syms1
));
4252 static const char *expected_syms2
[] = {
4255 SELF_CHECK (check_find_bounds_finds (mock_index
,
4256 "\377\377", expected_syms2
));
4260 /* Test dw2_expand_symtabs_matching_symbol. */
4263 test_dw2_expand_symtabs_matching_symbol ()
4265 mock_mapped_index
mock_index (test_symbols
);
4267 /* We let all tests run until the end even if some fails, for debug
4269 bool any_mismatch
= false;
4271 /* Create the expected symbols list (an initializer_list). Needed
4272 because lists have commas, and we need to pass them to CHECK,
4273 which is a macro. */
4274 #define EXPECT(...) { __VA_ARGS__ }
4276 /* Wrapper for check_match that passes down the current
4277 __FILE__/__LINE__. */
4278 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4279 any_mismatch |= !check_match (__FILE__, __LINE__, \
4281 NAME, MATCH_TYPE, COMPLETION_MODE, \
4284 /* Identity checks. */
4285 for (const char *sym
: test_symbols
)
4287 /* Should be able to match all existing symbols. */
4288 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4291 /* Should be able to match all existing symbols with
4293 std::string with_params
= std::string (sym
) + "(int)";
4294 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4297 /* Should be able to match all existing symbols with
4298 parameters and qualifiers. */
4299 with_params
= std::string (sym
) + " ( int ) const";
4300 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4303 /* This should really find sym, but cp-name-parser.y doesn't
4304 know about lvalue/rvalue qualifiers yet. */
4305 with_params
= std::string (sym
) + " ( int ) &&";
4306 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4310 /* Check that the name matching algorithm for completion doesn't get
4311 confused with Latin1 'ÿ' / 0xff. */
4313 static const char str
[] = "\377";
4314 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4315 EXPECT ("\377", "\377\377123"));
4318 /* Check that the increment-last-char in the matching algorithm for
4319 completion doesn't match "t1_fund" when completing "t1_func". */
4321 static const char str
[] = "t1_func";
4322 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4323 EXPECT ("t1_func", "t1_func1"));
4326 /* Check that completion mode works at each prefix of the expected
4329 static const char str
[] = "function(int)";
4330 size_t len
= strlen (str
);
4333 for (size_t i
= 1; i
< len
; i
++)
4335 lookup
.assign (str
, i
);
4336 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4337 EXPECT ("function"));
4341 /* While "w" is a prefix of both components, the match function
4342 should still only be called once. */
4344 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4346 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4350 /* Same, with a "complicated" symbol. */
4352 static const char str
[] = Z_SYM_NAME
;
4353 size_t len
= strlen (str
);
4356 for (size_t i
= 1; i
< len
; i
++)
4358 lookup
.assign (str
, i
);
4359 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4360 EXPECT (Z_SYM_NAME
));
4364 /* In FULL mode, an incomplete symbol doesn't match. */
4366 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4370 /* A complete symbol with parameters matches any overload, since the
4371 index has no overload info. */
4373 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4374 EXPECT ("std::zfunction", "std::zfunction2"));
4375 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4376 EXPECT ("std::zfunction", "std::zfunction2"));
4377 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4378 EXPECT ("std::zfunction", "std::zfunction2"));
4381 /* Check that whitespace is ignored appropriately. A symbol with a
4382 template argument list. */
4384 static const char expected
[] = "ns::foo<int>";
4385 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4387 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4391 /* Check that whitespace is ignored appropriately. A symbol with a
4392 template argument list that includes a pointer. */
4394 static const char expected
[] = "ns::foo<char*>";
4395 /* Try both completion and non-completion modes. */
4396 static const bool completion_mode
[2] = {false, true};
4397 for (size_t i
= 0; i
< 2; i
++)
4399 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4400 completion_mode
[i
], EXPECT (expected
));
4401 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4402 completion_mode
[i
], EXPECT (expected
));
4404 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4405 completion_mode
[i
], EXPECT (expected
));
4406 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4407 completion_mode
[i
], EXPECT (expected
));
4412 /* Check method qualifiers are ignored. */
4413 static const char expected
[] = "ns::foo<char*>";
4414 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4415 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4416 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4417 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4418 CHECK_MATCH ("foo < char * > ( int ) const",
4419 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4420 CHECK_MATCH ("foo < char * > ( int ) &&",
4421 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4424 /* Test lookup names that don't match anything. */
4426 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4429 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4433 /* Some wild matching tests, exercising "(anonymous namespace)",
4434 which should not be confused with a parameter list. */
4436 static const char *syms
[] = {
4440 "A :: B :: C ( int )",
4445 for (const char *s
: syms
)
4447 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4448 EXPECT ("(anonymous namespace)::A::B::C"));
4453 static const char expected
[] = "ns2::tmpl<int>::foo2";
4454 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4456 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4460 SELF_CHECK (!any_mismatch
);
4469 test_mapped_index_find_name_component_bounds ();
4470 test_dw2_expand_symtabs_matching_symbol ();
4473 }} // namespace selftests::dw2_expand_symtabs_matching
4475 #endif /* GDB_SELF_TEST */
4477 /* If FILE_MATCHER is NULL or if PER_CU has
4478 dwarf2_per_cu_quick_data::MARK set (see
4479 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4480 EXPANSION_NOTIFY on it. */
4483 dw2_expand_symtabs_matching_one
4484 (struct dwarf2_per_cu_data
*per_cu
,
4485 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4486 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4488 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4490 bool symtab_was_null
4491 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4493 dw2_instantiate_symtab (per_cu
, false);
4495 if (expansion_notify
!= NULL
4497 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4498 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4502 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4503 matched, to expand corresponding CUs that were marked. IDX is the
4504 index of the symbol name that matched. */
4507 dw2_expand_marked_cus
4508 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4509 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4510 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4513 offset_type
*vec
, vec_len
, vec_idx
;
4514 bool global_seen
= false;
4515 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4517 vec
= (offset_type
*) (index
.constant_pool
4518 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4519 vec_len
= MAYBE_SWAP (vec
[0]);
4520 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4522 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4523 /* This value is only valid for index versions >= 7. */
4524 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4525 gdb_index_symbol_kind symbol_kind
=
4526 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4527 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4528 /* Only check the symbol attributes if they're present.
4529 Indices prior to version 7 don't record them,
4530 and indices >= 7 may elide them for certain symbols
4531 (gold does this). */
4534 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4536 /* Work around gold/15646. */
4539 if (!is_static
&& global_seen
)
4545 /* Only check the symbol's kind if it has one. */
4550 case VARIABLES_DOMAIN
:
4551 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4554 case FUNCTIONS_DOMAIN
:
4555 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4559 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4562 case MODULES_DOMAIN
:
4563 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4571 /* Don't crash on bad data. */
4572 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4573 + dwarf2_per_objfile
->all_type_units
.size ()))
4575 complaint (_(".gdb_index entry has bad CU index"
4577 objfile_name (dwarf2_per_objfile
->objfile
));
4581 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4582 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4587 /* If FILE_MATCHER is non-NULL, set all the
4588 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4589 that match FILE_MATCHER. */
4592 dw_expand_symtabs_matching_file_matcher
4593 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4594 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4596 if (file_matcher
== NULL
)
4599 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4601 NULL
, xcalloc
, xfree
));
4602 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4604 NULL
, xcalloc
, xfree
));
4606 /* The rule is CUs specify all the files, including those used by
4607 any TU, so there's no need to scan TUs here. */
4609 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4613 per_cu
->v
.quick
->mark
= 0;
4615 /* We only need to look at symtabs not already expanded. */
4616 if (per_cu
->v
.quick
->compunit_symtab
)
4619 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4620 if (file_data
== NULL
)
4623 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4625 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4627 per_cu
->v
.quick
->mark
= 1;
4631 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4633 const char *this_real_name
;
4635 if (file_matcher (file_data
->file_names
[j
], false))
4637 per_cu
->v
.quick
->mark
= 1;
4641 /* Before we invoke realpath, which can get expensive when many
4642 files are involved, do a quick comparison of the basenames. */
4643 if (!basenames_may_differ
4644 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4648 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
4650 if (file_matcher (this_real_name
, false))
4652 per_cu
->v
.quick
->mark
= 1;
4657 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4658 ? visited_found
.get ()
4659 : visited_not_found
.get (),
4666 dw2_expand_symtabs_matching
4667 (struct objfile
*objfile
,
4668 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4669 const lookup_name_info
*lookup_name
,
4670 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4671 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4672 enum search_domain kind
)
4674 struct dwarf2_per_objfile
*dwarf2_per_objfile
4675 = get_dwarf2_per_objfile (objfile
);
4677 /* index_table is NULL if OBJF_READNOW. */
4678 if (!dwarf2_per_objfile
->index_table
)
4681 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4683 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4685 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4689 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4695 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4697 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4699 kind
, [&] (offset_type idx
)
4701 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4702 expansion_notify
, kind
);
4707 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4710 static struct compunit_symtab
*
4711 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4716 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4717 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4720 if (cust
->includes
== NULL
)
4723 for (i
= 0; cust
->includes
[i
]; ++i
)
4725 struct compunit_symtab
*s
= cust
->includes
[i
];
4727 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4735 static struct compunit_symtab
*
4736 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4737 struct bound_minimal_symbol msymbol
,
4739 struct obj_section
*section
,
4742 struct dwarf2_per_cu_data
*data
;
4743 struct compunit_symtab
*result
;
4745 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4748 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4749 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4750 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4754 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4755 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4756 paddress (objfile
->arch (), pc
));
4759 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4762 gdb_assert (result
!= NULL
);
4767 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4768 void *data
, int need_fullname
)
4770 struct dwarf2_per_objfile
*dwarf2_per_objfile
4771 = get_dwarf2_per_objfile (objfile
);
4773 if (!dwarf2_per_objfile
->filenames_cache
)
4775 dwarf2_per_objfile
->filenames_cache
.emplace ();
4777 htab_up
visited (htab_create_alloc (10,
4778 htab_hash_pointer
, htab_eq_pointer
,
4779 NULL
, xcalloc
, xfree
));
4781 /* The rule is CUs specify all the files, including those used
4782 by any TU, so there's no need to scan TUs here. We can
4783 ignore file names coming from already-expanded CUs. */
4785 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4787 if (per_cu
->v
.quick
->compunit_symtab
)
4789 void **slot
= htab_find_slot (visited
.get (),
4790 per_cu
->v
.quick
->file_names
,
4793 *slot
= per_cu
->v
.quick
->file_names
;
4797 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4799 /* We only need to look at symtabs not already expanded. */
4800 if (per_cu
->v
.quick
->compunit_symtab
)
4803 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4804 if (file_data
== NULL
)
4807 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4810 /* Already visited. */
4815 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4817 const char *filename
= file_data
->file_names
[j
];
4818 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4823 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4825 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4828 this_real_name
= gdb_realpath (filename
);
4829 (*fun
) (filename
, this_real_name
.get (), data
);
4834 dw2_has_symbols (struct objfile
*objfile
)
4839 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4842 dw2_find_last_source_symtab
,
4843 dw2_forget_cached_source_info
,
4844 dw2_map_symtabs_matching_filename
,
4849 dw2_expand_symtabs_for_function
,
4850 dw2_expand_all_symtabs
,
4851 dw2_expand_symtabs_with_fullname
,
4852 dw2_map_matching_symbols
,
4853 dw2_expand_symtabs_matching
,
4854 dw2_find_pc_sect_compunit_symtab
,
4856 dw2_map_symbol_filenames
4859 /* DWARF-5 debug_names reader. */
4861 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4862 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4864 /* A helper function that reads the .debug_names section in SECTION
4865 and fills in MAP. FILENAME is the name of the file containing the
4866 section; it is used for error reporting.
4868 Returns true if all went well, false otherwise. */
4871 read_debug_names_from_section (struct objfile
*objfile
,
4872 const char *filename
,
4873 struct dwarf2_section_info
*section
,
4874 mapped_debug_names
&map
)
4876 if (section
->empty ())
4879 /* Older elfutils strip versions could keep the section in the main
4880 executable while splitting it for the separate debug info file. */
4881 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4884 section
->read (objfile
);
4886 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4888 const gdb_byte
*addr
= section
->buffer
;
4890 bfd
*const abfd
= section
->get_bfd_owner ();
4892 unsigned int bytes_read
;
4893 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4896 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4897 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4898 if (bytes_read
+ length
!= section
->size
)
4900 /* There may be multiple per-CU indices. */
4901 warning (_("Section .debug_names in %s length %s does not match "
4902 "section length %s, ignoring .debug_names."),
4903 filename
, plongest (bytes_read
+ length
),
4904 pulongest (section
->size
));
4908 /* The version number. */
4909 uint16_t version
= read_2_bytes (abfd
, addr
);
4913 warning (_("Section .debug_names in %s has unsupported version %d, "
4914 "ignoring .debug_names."),
4920 uint16_t padding
= read_2_bytes (abfd
, addr
);
4924 warning (_("Section .debug_names in %s has unsupported padding %d, "
4925 "ignoring .debug_names."),
4930 /* comp_unit_count - The number of CUs in the CU list. */
4931 map
.cu_count
= read_4_bytes (abfd
, addr
);
4934 /* local_type_unit_count - The number of TUs in the local TU
4936 map
.tu_count
= read_4_bytes (abfd
, addr
);
4939 /* foreign_type_unit_count - The number of TUs in the foreign TU
4941 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4943 if (foreign_tu_count
!= 0)
4945 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4946 "ignoring .debug_names."),
4947 filename
, static_cast<unsigned long> (foreign_tu_count
));
4951 /* bucket_count - The number of hash buckets in the hash lookup
4953 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4956 /* name_count - The number of unique names in the index. */
4957 map
.name_count
= read_4_bytes (abfd
, addr
);
4960 /* abbrev_table_size - The size in bytes of the abbreviations
4962 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4965 /* augmentation_string_size - The size in bytes of the augmentation
4966 string. This value is rounded up to a multiple of 4. */
4967 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4969 map
.augmentation_is_gdb
= ((augmentation_string_size
4970 == sizeof (dwarf5_augmentation
))
4971 && memcmp (addr
, dwarf5_augmentation
,
4972 sizeof (dwarf5_augmentation
)) == 0);
4973 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4974 addr
+= augmentation_string_size
;
4977 map
.cu_table_reordered
= addr
;
4978 addr
+= map
.cu_count
* map
.offset_size
;
4980 /* List of Local TUs */
4981 map
.tu_table_reordered
= addr
;
4982 addr
+= map
.tu_count
* map
.offset_size
;
4984 /* Hash Lookup Table */
4985 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4986 addr
+= map
.bucket_count
* 4;
4987 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4988 addr
+= map
.name_count
* 4;
4991 map
.name_table_string_offs_reordered
= addr
;
4992 addr
+= map
.name_count
* map
.offset_size
;
4993 map
.name_table_entry_offs_reordered
= addr
;
4994 addr
+= map
.name_count
* map
.offset_size
;
4996 const gdb_byte
*abbrev_table_start
= addr
;
4999 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5004 const auto insertpair
5005 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5006 if (!insertpair
.second
)
5008 warning (_("Section .debug_names in %s has duplicate index %s, "
5009 "ignoring .debug_names."),
5010 filename
, pulongest (index_num
));
5013 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5014 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5019 mapped_debug_names::index_val::attr attr
;
5020 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5022 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5024 if (attr
.form
== DW_FORM_implicit_const
)
5026 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5030 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5032 indexval
.attr_vec
.push_back (std::move (attr
));
5035 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5037 warning (_("Section .debug_names in %s has abbreviation_table "
5038 "of size %s vs. written as %u, ignoring .debug_names."),
5039 filename
, plongest (addr
- abbrev_table_start
),
5043 map
.entry_pool
= addr
;
5048 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5052 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5053 const mapped_debug_names
&map
,
5054 dwarf2_section_info
§ion
,
5057 if (!map
.augmentation_is_gdb
)
5059 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5061 sect_offset sect_off
5062 = (sect_offset
) (extract_unsigned_integer
5063 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5065 map
.dwarf5_byte_order
));
5066 /* We don't know the length of the CU, because the CU list in a
5067 .debug_names index can be incomplete, so we can't use the start of
5068 the next CU as end of this CU. We create the CUs here with length 0,
5069 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5070 dwarf2_per_cu_data
*per_cu
5071 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5073 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5077 sect_offset sect_off_prev
;
5078 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5080 sect_offset sect_off_next
;
5081 if (i
< map
.cu_count
)
5084 = (sect_offset
) (extract_unsigned_integer
5085 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5087 map
.dwarf5_byte_order
));
5090 sect_off_next
= (sect_offset
) section
.size
;
5093 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5094 dwarf2_per_cu_data
*per_cu
5095 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5096 sect_off_prev
, length
);
5097 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5099 sect_off_prev
= sect_off_next
;
5103 /* Read the CU list from the mapped index, and use it to create all
5104 the CU objects for this dwarf2_per_objfile. */
5107 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5108 const mapped_debug_names
&map
,
5109 const mapped_debug_names
&dwz_map
)
5111 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5112 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5114 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5115 dwarf2_per_objfile
->info
,
5116 false /* is_dwz */);
5118 if (dwz_map
.cu_count
== 0)
5121 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5122 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5126 /* Read .debug_names. If everything went ok, initialize the "quick"
5127 elements of all the CUs and return true. Otherwise, return false. */
5130 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5132 std::unique_ptr
<mapped_debug_names
> map
5133 (new mapped_debug_names (dwarf2_per_objfile
));
5134 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5135 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5137 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5138 &dwarf2_per_objfile
->debug_names
,
5142 /* Don't use the index if it's empty. */
5143 if (map
->name_count
== 0)
5146 /* If there is a .dwz file, read it so we can get its CU list as
5148 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5151 if (!read_debug_names_from_section (objfile
,
5152 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5153 &dwz
->debug_names
, dwz_map
))
5155 warning (_("could not read '.debug_names' section from %s; skipping"),
5156 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5161 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5163 if (map
->tu_count
!= 0)
5165 /* We can only handle a single .debug_types when we have an
5167 if (dwarf2_per_objfile
->types
.size () != 1)
5170 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5172 create_signatured_type_table_from_debug_names
5173 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5176 create_addrmap_from_aranges (dwarf2_per_objfile
,
5177 &dwarf2_per_objfile
->debug_aranges
);
5179 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5180 dwarf2_per_objfile
->using_index
= 1;
5181 dwarf2_per_objfile
->quick_file_names_table
=
5182 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5187 /* Type used to manage iterating over all CUs looking for a symbol for
5190 class dw2_debug_names_iterator
5193 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5194 gdb::optional
<block_enum
> block_index
,
5197 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5198 m_addr (find_vec_in_debug_names (map
, name
))
5201 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5202 search_domain search
, uint32_t namei
)
5205 m_addr (find_vec_in_debug_names (map
, namei
))
5208 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5209 block_enum block_index
, domain_enum domain
,
5211 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5212 m_addr (find_vec_in_debug_names (map
, namei
))
5215 /* Return the next matching CU or NULL if there are no more. */
5216 dwarf2_per_cu_data
*next ();
5219 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5221 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5224 /* The internalized form of .debug_names. */
5225 const mapped_debug_names
&m_map
;
5227 /* If set, only look for symbols that match that block. Valid values are
5228 GLOBAL_BLOCK and STATIC_BLOCK. */
5229 const gdb::optional
<block_enum
> m_block_index
;
5231 /* The kind of symbol we're looking for. */
5232 const domain_enum m_domain
= UNDEF_DOMAIN
;
5233 const search_domain m_search
= ALL_DOMAIN
;
5235 /* The list of CUs from the index entry of the symbol, or NULL if
5237 const gdb_byte
*m_addr
;
5241 mapped_debug_names::namei_to_name (uint32_t namei
) const
5243 const ULONGEST namei_string_offs
5244 = extract_unsigned_integer ((name_table_string_offs_reordered
5245 + namei
* offset_size
),
5248 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5252 /* Find a slot in .debug_names for the object named NAME. If NAME is
5253 found, return pointer to its pool data. If NAME cannot be found,
5257 dw2_debug_names_iterator::find_vec_in_debug_names
5258 (const mapped_debug_names
&map
, const char *name
)
5260 int (*cmp
) (const char *, const char *);
5262 gdb::unique_xmalloc_ptr
<char> without_params
;
5263 if (current_language
->la_language
== language_cplus
5264 || current_language
->la_language
== language_fortran
5265 || current_language
->la_language
== language_d
)
5267 /* NAME is already canonical. Drop any qualifiers as
5268 .debug_names does not contain any. */
5270 if (strchr (name
, '(') != NULL
)
5272 without_params
= cp_remove_params (name
);
5273 if (without_params
!= NULL
)
5274 name
= without_params
.get ();
5278 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5280 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5282 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5283 (map
.bucket_table_reordered
5284 + (full_hash
% map
.bucket_count
)), 4,
5285 map
.dwarf5_byte_order
);
5289 if (namei
>= map
.name_count
)
5291 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5293 namei
, map
.name_count
,
5294 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5300 const uint32_t namei_full_hash
5301 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5302 (map
.hash_table_reordered
+ namei
), 4,
5303 map
.dwarf5_byte_order
);
5304 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5307 if (full_hash
== namei_full_hash
)
5309 const char *const namei_string
= map
.namei_to_name (namei
);
5311 #if 0 /* An expensive sanity check. */
5312 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5314 complaint (_("Wrong .debug_names hash for string at index %u "
5316 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5321 if (cmp (namei_string
, name
) == 0)
5323 const ULONGEST namei_entry_offs
5324 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5325 + namei
* map
.offset_size
),
5326 map
.offset_size
, map
.dwarf5_byte_order
);
5327 return map
.entry_pool
+ namei_entry_offs
;
5332 if (namei
>= map
.name_count
)
5338 dw2_debug_names_iterator::find_vec_in_debug_names
5339 (const mapped_debug_names
&map
, uint32_t namei
)
5341 if (namei
>= map
.name_count
)
5343 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5345 namei
, map
.name_count
,
5346 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5350 const ULONGEST namei_entry_offs
5351 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5352 + namei
* map
.offset_size
),
5353 map
.offset_size
, map
.dwarf5_byte_order
);
5354 return map
.entry_pool
+ namei_entry_offs
;
5357 /* See dw2_debug_names_iterator. */
5359 dwarf2_per_cu_data
*
5360 dw2_debug_names_iterator::next ()
5365 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5366 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5367 bfd
*const abfd
= objfile
->obfd
;
5371 unsigned int bytes_read
;
5372 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5373 m_addr
+= bytes_read
;
5377 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5378 if (indexval_it
== m_map
.abbrev_map
.cend ())
5380 complaint (_("Wrong .debug_names undefined abbrev code %s "
5382 pulongest (abbrev
), objfile_name (objfile
));
5385 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5386 enum class symbol_linkage
{
5390 } symbol_linkage_
= symbol_linkage::unknown
;
5391 dwarf2_per_cu_data
*per_cu
= NULL
;
5392 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5397 case DW_FORM_implicit_const
:
5398 ull
= attr
.implicit_const
;
5400 case DW_FORM_flag_present
:
5404 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5405 m_addr
+= bytes_read
;
5408 ull
= read_4_bytes (abfd
, m_addr
);
5412 ull
= read_8_bytes (abfd
, m_addr
);
5415 case DW_FORM_ref_sig8
:
5416 ull
= read_8_bytes (abfd
, m_addr
);
5420 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5421 dwarf_form_name (attr
.form
),
5422 objfile_name (objfile
));
5425 switch (attr
.dw_idx
)
5427 case DW_IDX_compile_unit
:
5428 /* Don't crash on bad data. */
5429 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5431 complaint (_(".debug_names entry has bad CU index %s"
5434 objfile_name (dwarf2_per_objfile
->objfile
));
5437 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5439 case DW_IDX_type_unit
:
5440 /* Don't crash on bad data. */
5441 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5443 complaint (_(".debug_names entry has bad TU index %s"
5446 objfile_name (dwarf2_per_objfile
->objfile
));
5449 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5451 case DW_IDX_die_offset
:
5452 /* In a per-CU index (as opposed to a per-module index), index
5453 entries without CU attribute implicitly refer to the single CU. */
5455 per_cu
= dwarf2_per_objfile
->get_cu (0);
5457 case DW_IDX_GNU_internal
:
5458 if (!m_map
.augmentation_is_gdb
)
5460 symbol_linkage_
= symbol_linkage::static_
;
5462 case DW_IDX_GNU_external
:
5463 if (!m_map
.augmentation_is_gdb
)
5465 symbol_linkage_
= symbol_linkage::extern_
;
5470 /* Skip if already read in. */
5471 if (per_cu
->v
.quick
->compunit_symtab
)
5474 /* Check static vs global. */
5475 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5477 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5478 const bool symbol_is_static
=
5479 symbol_linkage_
== symbol_linkage::static_
;
5480 if (want_static
!= symbol_is_static
)
5484 /* Match dw2_symtab_iter_next, symbol_kind
5485 and debug_names::psymbol_tag. */
5489 switch (indexval
.dwarf_tag
)
5491 case DW_TAG_variable
:
5492 case DW_TAG_subprogram
:
5493 /* Some types are also in VAR_DOMAIN. */
5494 case DW_TAG_typedef
:
5495 case DW_TAG_structure_type
:
5502 switch (indexval
.dwarf_tag
)
5504 case DW_TAG_typedef
:
5505 case DW_TAG_structure_type
:
5512 switch (indexval
.dwarf_tag
)
5515 case DW_TAG_variable
:
5522 switch (indexval
.dwarf_tag
)
5534 /* Match dw2_expand_symtabs_matching, symbol_kind and
5535 debug_names::psymbol_tag. */
5538 case VARIABLES_DOMAIN
:
5539 switch (indexval
.dwarf_tag
)
5541 case DW_TAG_variable
:
5547 case FUNCTIONS_DOMAIN
:
5548 switch (indexval
.dwarf_tag
)
5550 case DW_TAG_subprogram
:
5557 switch (indexval
.dwarf_tag
)
5559 case DW_TAG_typedef
:
5560 case DW_TAG_structure_type
:
5566 case MODULES_DOMAIN
:
5567 switch (indexval
.dwarf_tag
)
5581 static struct compunit_symtab
*
5582 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5583 const char *name
, domain_enum domain
)
5585 struct dwarf2_per_objfile
*dwarf2_per_objfile
5586 = get_dwarf2_per_objfile (objfile
);
5588 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5591 /* index is NULL if OBJF_READNOW. */
5594 const auto &map
= *mapp
;
5596 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5598 struct compunit_symtab
*stab_best
= NULL
;
5599 struct dwarf2_per_cu_data
*per_cu
;
5600 while ((per_cu
= iter
.next ()) != NULL
)
5602 struct symbol
*sym
, *with_opaque
= NULL
;
5603 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5604 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5605 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5607 sym
= block_find_symbol (block
, name
, domain
,
5608 block_find_non_opaque_type_preferred
,
5611 /* Some caution must be observed with overloaded functions and
5612 methods, since the index will not contain any overload
5613 information (but NAME might contain it). */
5616 && strcmp_iw (sym
->search_name (), name
) == 0)
5618 if (with_opaque
!= NULL
5619 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5622 /* Keep looking through other CUs. */
5628 /* This dumps minimal information about .debug_names. It is called
5629 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5630 uses this to verify that .debug_names has been loaded. */
5633 dw2_debug_names_dump (struct objfile
*objfile
)
5635 struct dwarf2_per_objfile
*dwarf2_per_objfile
5636 = get_dwarf2_per_objfile (objfile
);
5638 gdb_assert (dwarf2_per_objfile
->using_index
);
5639 printf_filtered (".debug_names:");
5640 if (dwarf2_per_objfile
->debug_names_table
)
5641 printf_filtered (" exists\n");
5643 printf_filtered (" faked for \"readnow\"\n");
5644 printf_filtered ("\n");
5648 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5649 const char *func_name
)
5651 struct dwarf2_per_objfile
*dwarf2_per_objfile
5652 = get_dwarf2_per_objfile (objfile
);
5654 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5655 if (dwarf2_per_objfile
->debug_names_table
)
5657 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5659 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5661 struct dwarf2_per_cu_data
*per_cu
;
5662 while ((per_cu
= iter
.next ()) != NULL
)
5663 dw2_instantiate_symtab (per_cu
, false);
5668 dw2_debug_names_map_matching_symbols
5669 (struct objfile
*objfile
,
5670 const lookup_name_info
&name
, domain_enum domain
,
5672 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5673 symbol_compare_ftype
*ordered_compare
)
5675 struct dwarf2_per_objfile
*dwarf2_per_objfile
5676 = get_dwarf2_per_objfile (objfile
);
5678 /* debug_names_table is NULL if OBJF_READNOW. */
5679 if (!dwarf2_per_objfile
->debug_names_table
)
5682 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5683 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5685 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5686 auto matcher
= [&] (const char *symname
)
5688 if (ordered_compare
== nullptr)
5690 return ordered_compare (symname
, match_name
) == 0;
5693 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5694 [&] (offset_type namei
)
5696 /* The name was matched, now expand corresponding CUs that were
5698 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5700 struct dwarf2_per_cu_data
*per_cu
;
5701 while ((per_cu
= iter
.next ()) != NULL
)
5702 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5706 /* It's a shame we couldn't do this inside the
5707 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5708 that have already been expanded. Instead, this loop matches what
5709 the psymtab code does. */
5710 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5712 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5713 if (cust
!= nullptr)
5715 const struct block
*block
5716 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5717 if (!iterate_over_symbols_terminated (block
, name
,
5725 dw2_debug_names_expand_symtabs_matching
5726 (struct objfile
*objfile
,
5727 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5728 const lookup_name_info
*lookup_name
,
5729 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5730 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5731 enum search_domain kind
)
5733 struct dwarf2_per_objfile
*dwarf2_per_objfile
5734 = get_dwarf2_per_objfile (objfile
);
5736 /* debug_names_table is NULL if OBJF_READNOW. */
5737 if (!dwarf2_per_objfile
->debug_names_table
)
5740 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5742 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5744 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5748 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5754 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5756 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5758 kind
, [&] (offset_type namei
)
5760 /* The name was matched, now expand corresponding CUs that were
5762 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5764 struct dwarf2_per_cu_data
*per_cu
;
5765 while ((per_cu
= iter
.next ()) != NULL
)
5766 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5772 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5775 dw2_find_last_source_symtab
,
5776 dw2_forget_cached_source_info
,
5777 dw2_map_symtabs_matching_filename
,
5778 dw2_debug_names_lookup_symbol
,
5781 dw2_debug_names_dump
,
5782 dw2_debug_names_expand_symtabs_for_function
,
5783 dw2_expand_all_symtabs
,
5784 dw2_expand_symtabs_with_fullname
,
5785 dw2_debug_names_map_matching_symbols
,
5786 dw2_debug_names_expand_symtabs_matching
,
5787 dw2_find_pc_sect_compunit_symtab
,
5789 dw2_map_symbol_filenames
5792 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5793 to either a dwarf2_per_objfile or dwz_file object. */
5795 template <typename T
>
5796 static gdb::array_view
<const gdb_byte
>
5797 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5799 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5801 if (section
->empty ())
5804 /* Older elfutils strip versions could keep the section in the main
5805 executable while splitting it for the separate debug info file. */
5806 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5809 section
->read (obj
);
5811 /* dwarf2_section_info::size is a bfd_size_type, while
5812 gdb::array_view works with size_t. On 32-bit hosts, with
5813 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5814 is 32-bit. So we need an explicit narrowing conversion here.
5815 This is fine, because it's impossible to allocate or mmap an
5816 array/buffer larger than what size_t can represent. */
5817 return gdb::make_array_view (section
->buffer
, section
->size
);
5820 /* Lookup the index cache for the contents of the index associated to
5823 static gdb::array_view
<const gdb_byte
>
5824 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5826 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5827 if (build_id
== nullptr)
5830 return global_index_cache
.lookup_gdb_index (build_id
,
5831 &dwarf2_obj
->index_cache_res
);
5834 /* Same as the above, but for DWZ. */
5836 static gdb::array_view
<const gdb_byte
>
5837 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5839 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5840 if (build_id
== nullptr)
5843 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5846 /* See symfile.h. */
5849 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5851 struct dwarf2_per_objfile
*dwarf2_per_objfile
5852 = get_dwarf2_per_objfile (objfile
);
5854 /* If we're about to read full symbols, don't bother with the
5855 indices. In this case we also don't care if some other debug
5856 format is making psymtabs, because they are all about to be
5858 if ((objfile
->flags
& OBJF_READNOW
))
5860 dwarf2_per_objfile
->using_index
= 1;
5861 create_all_comp_units (dwarf2_per_objfile
);
5862 create_all_type_units (dwarf2_per_objfile
);
5863 dwarf2_per_objfile
->quick_file_names_table
5864 = create_quick_file_names_table
5865 (dwarf2_per_objfile
->all_comp_units
.size ());
5867 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5868 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5870 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5872 per_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
5873 struct dwarf2_per_cu_quick_data
);
5876 /* Return 1 so that gdb sees the "quick" functions. However,
5877 these functions will be no-ops because we will have expanded
5879 *index_kind
= dw_index_kind::GDB_INDEX
;
5883 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5885 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5889 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5890 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5891 get_gdb_index_contents_from_section
<dwz_file
>))
5893 *index_kind
= dw_index_kind::GDB_INDEX
;
5897 /* ... otherwise, try to find the index in the index cache. */
5898 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5899 get_gdb_index_contents_from_cache
,
5900 get_gdb_index_contents_from_cache_dwz
))
5902 global_index_cache
.hit ();
5903 *index_kind
= dw_index_kind::GDB_INDEX
;
5907 global_index_cache
.miss ();
5913 /* Build a partial symbol table. */
5916 dwarf2_build_psymtabs (struct objfile
*objfile
)
5918 struct dwarf2_per_objfile
*dwarf2_per_objfile
5919 = get_dwarf2_per_objfile (objfile
);
5921 init_psymbol_list (objfile
, 1024);
5925 /* This isn't really ideal: all the data we allocate on the
5926 objfile's obstack is still uselessly kept around. However,
5927 freeing it seems unsafe. */
5928 psymtab_discarder
psymtabs (objfile
);
5929 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5932 /* (maybe) store an index in the cache. */
5933 global_index_cache
.store (dwarf2_per_objfile
);
5935 catch (const gdb_exception_error
&except
)
5937 exception_print (gdb_stderr
, except
);
5941 /* Find the base address of the compilation unit for range lists and
5942 location lists. It will normally be specified by DW_AT_low_pc.
5943 In DWARF-3 draft 4, the base address could be overridden by
5944 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5945 compilation units with discontinuous ranges. */
5948 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5950 struct attribute
*attr
;
5952 cu
->base_address
.reset ();
5954 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5955 if (attr
!= nullptr)
5956 cu
->base_address
= attr
->value_as_address ();
5959 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5960 if (attr
!= nullptr)
5961 cu
->base_address
= attr
->value_as_address ();
5965 /* Helper function that returns the proper abbrev section for
5968 static struct dwarf2_section_info
*
5969 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5971 struct dwarf2_section_info
*abbrev
;
5972 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5974 if (this_cu
->is_dwz
)
5975 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5977 abbrev
= &dwarf2_per_objfile
->abbrev
;
5982 /* Fetch the abbreviation table offset from a comp or type unit header. */
5985 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5986 struct dwarf2_section_info
*section
,
5987 sect_offset sect_off
)
5989 bfd
*abfd
= section
->get_bfd_owner ();
5990 const gdb_byte
*info_ptr
;
5991 unsigned int initial_length_size
, offset_size
;
5994 section
->read (dwarf2_per_objfile
->objfile
);
5995 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5996 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5997 offset_size
= initial_length_size
== 4 ? 4 : 8;
5998 info_ptr
+= initial_length_size
;
6000 version
= read_2_bytes (abfd
, info_ptr
);
6004 /* Skip unit type and address size. */
6008 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6011 /* A partial symtab that is used only for include files. */
6012 struct dwarf2_include_psymtab
: public partial_symtab
6014 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6015 : partial_symtab (filename
, objfile
)
6019 void read_symtab (struct objfile
*objfile
) override
6021 /* It's an include file, no symbols to read for it.
6022 Everything is in the includer symtab. */
6024 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6025 expansion of the includer psymtab. We use the dependencies[0] field to
6026 model the includer. But if we go the regular route of calling
6027 expand_psymtab here, and having expand_psymtab call expand_dependencies
6028 to expand the includer, we'll only use expand_psymtab on the includer
6029 (making it a non-toplevel psymtab), while if we expand the includer via
6030 another path, we'll use read_symtab (making it a toplevel psymtab).
6031 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6032 psymtab, and trigger read_symtab on the includer here directly. */
6033 includer ()->read_symtab (objfile
);
6036 void expand_psymtab (struct objfile
*objfile
) override
6038 /* This is not called by read_symtab, and should not be called by any
6039 expand_dependencies. */
6043 bool readin_p () const override
6045 return includer ()->readin_p ();
6048 struct compunit_symtab
*get_compunit_symtab () const override
6054 partial_symtab
*includer () const
6056 /* An include psymtab has exactly one dependency: the psymtab that
6058 gdb_assert (this->number_of_dependencies
== 1);
6059 return this->dependencies
[0];
6063 /* Allocate a new partial symtab for file named NAME and mark this new
6064 partial symtab as being an include of PST. */
6067 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6068 struct objfile
*objfile
)
6070 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6072 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6073 subpst
->dirname
= pst
->dirname
;
6075 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6076 subpst
->dependencies
[0] = pst
;
6077 subpst
->number_of_dependencies
= 1;
6080 /* Read the Line Number Program data and extract the list of files
6081 included by the source file represented by PST. Build an include
6082 partial symtab for each of these included files. */
6085 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6086 struct die_info
*die
,
6087 dwarf2_psymtab
*pst
)
6090 struct attribute
*attr
;
6092 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6093 if (attr
!= nullptr)
6094 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6096 return; /* No linetable, so no includes. */
6098 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6099 that we pass in the raw text_low here; that is ok because we're
6100 only decoding the line table to make include partial symtabs, and
6101 so the addresses aren't really used. */
6102 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6103 pst
->raw_text_low (), 1);
6107 hash_signatured_type (const void *item
)
6109 const struct signatured_type
*sig_type
6110 = (const struct signatured_type
*) item
;
6112 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6113 return sig_type
->signature
;
6117 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6119 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6120 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6122 return lhs
->signature
== rhs
->signature
;
6125 /* Allocate a hash table for signatured types. */
6128 allocate_signatured_type_table ()
6130 return htab_up (htab_create_alloc (41,
6131 hash_signatured_type
,
6133 NULL
, xcalloc
, xfree
));
6136 /* A helper function to add a signatured type CU to a table. */
6139 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6141 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6142 std::vector
<signatured_type
*> *all_type_units
6143 = (std::vector
<signatured_type
*> *) datum
;
6145 all_type_units
->push_back (sigt
);
6150 /* A helper for create_debug_types_hash_table. Read types from SECTION
6151 and fill them into TYPES_HTAB. It will process only type units,
6152 therefore DW_UT_type. */
6155 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6156 struct dwo_file
*dwo_file
,
6157 dwarf2_section_info
*section
, htab_up
&types_htab
,
6158 rcuh_kind section_kind
)
6160 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6161 struct dwarf2_section_info
*abbrev_section
;
6163 const gdb_byte
*info_ptr
, *end_ptr
;
6165 abbrev_section
= (dwo_file
!= NULL
6166 ? &dwo_file
->sections
.abbrev
6167 : &dwarf2_per_objfile
->abbrev
);
6169 if (dwarf_read_debug
)
6170 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6171 section
->get_name (),
6172 abbrev_section
->get_file_name ());
6174 section
->read (objfile
);
6175 info_ptr
= section
->buffer
;
6177 if (info_ptr
== NULL
)
6180 /* We can't set abfd until now because the section may be empty or
6181 not present, in which case the bfd is unknown. */
6182 abfd
= section
->get_bfd_owner ();
6184 /* We don't use cutu_reader here because we don't need to read
6185 any dies: the signature is in the header. */
6187 end_ptr
= info_ptr
+ section
->size
;
6188 while (info_ptr
< end_ptr
)
6190 struct signatured_type
*sig_type
;
6191 struct dwo_unit
*dwo_tu
;
6193 const gdb_byte
*ptr
= info_ptr
;
6194 struct comp_unit_head header
;
6195 unsigned int length
;
6197 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6199 /* Initialize it due to a false compiler warning. */
6200 header
.signature
= -1;
6201 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6203 /* We need to read the type's signature in order to build the hash
6204 table, but we don't need anything else just yet. */
6206 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6207 abbrev_section
, ptr
, section_kind
);
6209 length
= header
.get_length ();
6211 /* Skip dummy type units. */
6212 if (ptr
>= info_ptr
+ length
6213 || peek_abbrev_code (abfd
, ptr
) == 0
6214 || header
.unit_type
!= DW_UT_type
)
6220 if (types_htab
== NULL
)
6223 types_htab
= allocate_dwo_unit_table ();
6225 types_htab
= allocate_signatured_type_table ();
6231 dwo_tu
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
6233 dwo_tu
->dwo_file
= dwo_file
;
6234 dwo_tu
->signature
= header
.signature
;
6235 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6236 dwo_tu
->section
= section
;
6237 dwo_tu
->sect_off
= sect_off
;
6238 dwo_tu
->length
= length
;
6242 /* N.B.: type_offset is not usable if this type uses a DWO file.
6243 The real type_offset is in the DWO file. */
6245 sig_type
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
6246 struct signatured_type
);
6247 sig_type
->signature
= header
.signature
;
6248 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6249 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6250 sig_type
->per_cu
.is_debug_types
= 1;
6251 sig_type
->per_cu
.section
= section
;
6252 sig_type
->per_cu
.sect_off
= sect_off
;
6253 sig_type
->per_cu
.length
= length
;
6256 slot
= htab_find_slot (types_htab
.get (),
6257 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6259 gdb_assert (slot
!= NULL
);
6262 sect_offset dup_sect_off
;
6266 const struct dwo_unit
*dup_tu
6267 = (const struct dwo_unit
*) *slot
;
6269 dup_sect_off
= dup_tu
->sect_off
;
6273 const struct signatured_type
*dup_tu
6274 = (const struct signatured_type
*) *slot
;
6276 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6279 complaint (_("debug type entry at offset %s is duplicate to"
6280 " the entry at offset %s, signature %s"),
6281 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6282 hex_string (header
.signature
));
6284 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6286 if (dwarf_read_debug
> 1)
6287 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6288 sect_offset_str (sect_off
),
6289 hex_string (header
.signature
));
6295 /* Create the hash table of all entries in the .debug_types
6296 (or .debug_types.dwo) section(s).
6297 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6298 otherwise it is NULL.
6300 The result is a pointer to the hash table or NULL if there are no types.
6302 Note: This function processes DWO files only, not DWP files. */
6305 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6306 struct dwo_file
*dwo_file
,
6307 gdb::array_view
<dwarf2_section_info
> type_sections
,
6308 htab_up
&types_htab
)
6310 for (dwarf2_section_info
§ion
: type_sections
)
6311 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6312 types_htab
, rcuh_kind::TYPE
);
6315 /* Create the hash table of all entries in the .debug_types section,
6316 and initialize all_type_units.
6317 The result is zero if there is an error (e.g. missing .debug_types section),
6318 otherwise non-zero. */
6321 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6325 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6326 &dwarf2_per_objfile
->info
, types_htab
,
6327 rcuh_kind::COMPILE
);
6328 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6329 dwarf2_per_objfile
->types
, types_htab
);
6330 if (types_htab
== NULL
)
6332 dwarf2_per_objfile
->signatured_types
= NULL
;
6336 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6338 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6339 dwarf2_per_objfile
->all_type_units
.reserve
6340 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6342 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6343 add_signatured_type_cu_to_table
,
6344 &dwarf2_per_objfile
->all_type_units
);
6349 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6350 If SLOT is non-NULL, it is the entry to use in the hash table.
6351 Otherwise we find one. */
6353 static struct signatured_type
*
6354 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6357 if (dwarf2_per_objfile
->all_type_units
.size ()
6358 == dwarf2_per_objfile
->all_type_units
.capacity ())
6359 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6361 signatured_type
*sig_type
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
6362 struct signatured_type
);
6364 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6365 sig_type
->signature
= sig
;
6366 sig_type
->per_cu
.is_debug_types
= 1;
6367 if (dwarf2_per_objfile
->using_index
)
6369 sig_type
->per_cu
.v
.quick
=
6370 OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
6371 struct dwarf2_per_cu_quick_data
);
6376 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6379 gdb_assert (*slot
== NULL
);
6381 /* The rest of sig_type must be filled in by the caller. */
6385 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6386 Fill in SIG_ENTRY with DWO_ENTRY. */
6389 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6390 struct signatured_type
*sig_entry
,
6391 struct dwo_unit
*dwo_entry
)
6393 /* Make sure we're not clobbering something we don't expect to. */
6394 gdb_assert (! sig_entry
->per_cu
.queued
);
6395 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6396 if (dwarf2_per_objfile
->using_index
)
6398 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6399 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6402 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6403 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6404 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6405 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6406 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6408 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6409 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6410 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6411 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6412 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6413 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6414 sig_entry
->dwo_unit
= dwo_entry
;
6417 /* Subroutine of lookup_signatured_type.
6418 If we haven't read the TU yet, create the signatured_type data structure
6419 for a TU to be read in directly from a DWO file, bypassing the stub.
6420 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6421 using .gdb_index, then when reading a CU we want to stay in the DWO file
6422 containing that CU. Otherwise we could end up reading several other DWO
6423 files (due to comdat folding) to process the transitive closure of all the
6424 mentioned TUs, and that can be slow. The current DWO file will have every
6425 type signature that it needs.
6426 We only do this for .gdb_index because in the psymtab case we already have
6427 to read all the DWOs to build the type unit groups. */
6429 static struct signatured_type
*
6430 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6432 struct dwarf2_per_objfile
*dwarf2_per_objfile
6433 = cu
->per_cu
->dwarf2_per_objfile
;
6434 struct dwo_file
*dwo_file
;
6435 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6436 struct signatured_type find_sig_entry
, *sig_entry
;
6439 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6441 /* If TU skeletons have been removed then we may not have read in any
6443 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6444 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6446 /* We only ever need to read in one copy of a signatured type.
6447 Use the global signatured_types array to do our own comdat-folding
6448 of types. If this is the first time we're reading this TU, and
6449 the TU has an entry in .gdb_index, replace the recorded data from
6450 .gdb_index with this TU. */
6452 find_sig_entry
.signature
= sig
;
6453 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6454 &find_sig_entry
, INSERT
);
6455 sig_entry
= (struct signatured_type
*) *slot
;
6457 /* We can get here with the TU already read, *or* in the process of being
6458 read. Don't reassign the global entry to point to this DWO if that's
6459 the case. Also note that if the TU is already being read, it may not
6460 have come from a DWO, the program may be a mix of Fission-compiled
6461 code and non-Fission-compiled code. */
6463 /* Have we already tried to read this TU?
6464 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6465 needn't exist in the global table yet). */
6466 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6469 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6470 dwo_unit of the TU itself. */
6471 dwo_file
= cu
->dwo_unit
->dwo_file
;
6473 /* Ok, this is the first time we're reading this TU. */
6474 if (dwo_file
->tus
== NULL
)
6476 find_dwo_entry
.signature
= sig
;
6477 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6479 if (dwo_entry
== NULL
)
6482 /* If the global table doesn't have an entry for this TU, add one. */
6483 if (sig_entry
== NULL
)
6484 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6486 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6487 sig_entry
->per_cu
.tu_read
= 1;
6491 /* Subroutine of lookup_signatured_type.
6492 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6493 then try the DWP file. If the TU stub (skeleton) has been removed then
6494 it won't be in .gdb_index. */
6496 static struct signatured_type
*
6497 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6499 struct dwarf2_per_objfile
*dwarf2_per_objfile
6500 = cu
->per_cu
->dwarf2_per_objfile
;
6501 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6502 struct dwo_unit
*dwo_entry
;
6503 struct signatured_type find_sig_entry
, *sig_entry
;
6506 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6507 gdb_assert (dwp_file
!= NULL
);
6509 /* If TU skeletons have been removed then we may not have read in any
6511 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6512 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6514 find_sig_entry
.signature
= sig
;
6515 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6516 &find_sig_entry
, INSERT
);
6517 sig_entry
= (struct signatured_type
*) *slot
;
6519 /* Have we already tried to read this TU?
6520 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6521 needn't exist in the global table yet). */
6522 if (sig_entry
!= NULL
)
6525 if (dwp_file
->tus
== NULL
)
6527 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6528 sig
, 1 /* is_debug_types */);
6529 if (dwo_entry
== NULL
)
6532 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6533 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6538 /* Lookup a signature based type for DW_FORM_ref_sig8.
6539 Returns NULL if signature SIG is not present in the table.
6540 It is up to the caller to complain about this. */
6542 static struct signatured_type
*
6543 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6545 struct dwarf2_per_objfile
*dwarf2_per_objfile
6546 = cu
->per_cu
->dwarf2_per_objfile
;
6549 && dwarf2_per_objfile
->using_index
)
6551 /* We're in a DWO/DWP file, and we're using .gdb_index.
6552 These cases require special processing. */
6553 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6554 return lookup_dwo_signatured_type (cu
, sig
);
6556 return lookup_dwp_signatured_type (cu
, sig
);
6560 struct signatured_type find_entry
, *entry
;
6562 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6564 find_entry
.signature
= sig
;
6565 entry
= ((struct signatured_type
*)
6566 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6572 /* Low level DIE reading support. */
6574 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6577 init_cu_die_reader (struct die_reader_specs
*reader
,
6578 struct dwarf2_cu
*cu
,
6579 struct dwarf2_section_info
*section
,
6580 struct dwo_file
*dwo_file
,
6581 struct abbrev_table
*abbrev_table
)
6583 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6584 reader
->abfd
= section
->get_bfd_owner ();
6586 reader
->dwo_file
= dwo_file
;
6587 reader
->die_section
= section
;
6588 reader
->buffer
= section
->buffer
;
6589 reader
->buffer_end
= section
->buffer
+ section
->size
;
6590 reader
->abbrev_table
= abbrev_table
;
6593 /* Subroutine of cutu_reader to simplify it.
6594 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6595 There's just a lot of work to do, and cutu_reader is big enough
6598 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6599 from it to the DIE in the DWO. If NULL we are skipping the stub.
6600 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6601 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6602 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6603 STUB_COMP_DIR may be non-NULL.
6604 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6605 are filled in with the info of the DIE from the DWO file.
6606 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6607 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6608 kept around for at least as long as *RESULT_READER.
6610 The result is non-zero if a valid (non-dummy) DIE was found. */
6613 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6614 struct dwo_unit
*dwo_unit
,
6615 struct die_info
*stub_comp_unit_die
,
6616 const char *stub_comp_dir
,
6617 struct die_reader_specs
*result_reader
,
6618 const gdb_byte
**result_info_ptr
,
6619 struct die_info
**result_comp_unit_die
,
6620 abbrev_table_up
*result_dwo_abbrev_table
)
6622 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6623 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6624 struct dwarf2_cu
*cu
= this_cu
->cu
;
6626 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6627 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6628 int i
,num_extra_attrs
;
6629 struct dwarf2_section_info
*dwo_abbrev_section
;
6630 struct die_info
*comp_unit_die
;
6632 /* At most one of these may be provided. */
6633 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6635 /* These attributes aren't processed until later:
6636 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6637 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6638 referenced later. However, these attributes are found in the stub
6639 which we won't have later. In order to not impose this complication
6640 on the rest of the code, we read them here and copy them to the
6649 if (stub_comp_unit_die
!= NULL
)
6651 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6653 if (! this_cu
->is_debug_types
)
6654 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6655 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6656 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6657 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6658 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6660 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6662 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6663 here (if needed). We need the value before we can process
6665 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6667 else if (stub_comp_dir
!= NULL
)
6669 /* Reconstruct the comp_dir attribute to simplify the code below. */
6670 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6671 comp_dir
->name
= DW_AT_comp_dir
;
6672 comp_dir
->form
= DW_FORM_string
;
6673 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6674 DW_STRING (comp_dir
) = stub_comp_dir
;
6677 /* Set up for reading the DWO CU/TU. */
6678 cu
->dwo_unit
= dwo_unit
;
6679 dwarf2_section_info
*section
= dwo_unit
->section
;
6680 section
->read (objfile
);
6681 abfd
= section
->get_bfd_owner ();
6682 begin_info_ptr
= info_ptr
= (section
->buffer
6683 + to_underlying (dwo_unit
->sect_off
));
6684 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6686 if (this_cu
->is_debug_types
)
6688 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6690 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6691 &cu
->header
, section
,
6693 info_ptr
, rcuh_kind::TYPE
);
6694 /* This is not an assert because it can be caused by bad debug info. */
6695 if (sig_type
->signature
!= cu
->header
.signature
)
6697 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6698 " TU at offset %s [in module %s]"),
6699 hex_string (sig_type
->signature
),
6700 hex_string (cu
->header
.signature
),
6701 sect_offset_str (dwo_unit
->sect_off
),
6702 bfd_get_filename (abfd
));
6704 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6705 /* For DWOs coming from DWP files, we don't know the CU length
6706 nor the type's offset in the TU until now. */
6707 dwo_unit
->length
= cu
->header
.get_length ();
6708 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6710 /* Establish the type offset that can be used to lookup the type.
6711 For DWO files, we don't know it until now. */
6712 sig_type
->type_offset_in_section
6713 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6717 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6718 &cu
->header
, section
,
6720 info_ptr
, rcuh_kind::COMPILE
);
6721 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6722 /* For DWOs coming from DWP files, we don't know the CU length
6724 dwo_unit
->length
= cu
->header
.get_length ();
6727 *result_dwo_abbrev_table
6728 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6729 cu
->header
.abbrev_sect_off
);
6730 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6731 result_dwo_abbrev_table
->get ());
6733 /* Read in the die, but leave space to copy over the attributes
6734 from the stub. This has the benefit of simplifying the rest of
6735 the code - all the work to maintain the illusion of a single
6736 DW_TAG_{compile,type}_unit DIE is done here. */
6737 num_extra_attrs
= ((stmt_list
!= NULL
)
6741 + (comp_dir
!= NULL
));
6742 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6745 /* Copy over the attributes from the stub to the DIE we just read in. */
6746 comp_unit_die
= *result_comp_unit_die
;
6747 i
= comp_unit_die
->num_attrs
;
6748 if (stmt_list
!= NULL
)
6749 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6751 comp_unit_die
->attrs
[i
++] = *low_pc
;
6752 if (high_pc
!= NULL
)
6753 comp_unit_die
->attrs
[i
++] = *high_pc
;
6755 comp_unit_die
->attrs
[i
++] = *ranges
;
6756 if (comp_dir
!= NULL
)
6757 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6758 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6760 if (dwarf_die_debug
)
6762 fprintf_unfiltered (gdb_stdlog
,
6763 "Read die from %s@0x%x of %s:\n",
6764 section
->get_name (),
6765 (unsigned) (begin_info_ptr
- section
->buffer
),
6766 bfd_get_filename (abfd
));
6767 dump_die (comp_unit_die
, dwarf_die_debug
);
6770 /* Skip dummy compilation units. */
6771 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6772 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6775 *result_info_ptr
= info_ptr
;
6779 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6780 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6781 signature is part of the header. */
6782 static gdb::optional
<ULONGEST
>
6783 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6785 if (cu
->header
.version
>= 5)
6786 return cu
->header
.signature
;
6787 struct attribute
*attr
;
6788 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6789 if (attr
== nullptr)
6790 return gdb::optional
<ULONGEST
> ();
6791 return DW_UNSND (attr
);
6794 /* Subroutine of cutu_reader to simplify it.
6795 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6796 Returns NULL if the specified DWO unit cannot be found. */
6798 static struct dwo_unit
*
6799 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6800 struct die_info
*comp_unit_die
,
6801 const char *dwo_name
)
6803 struct dwarf2_cu
*cu
= this_cu
->cu
;
6804 struct dwo_unit
*dwo_unit
;
6805 const char *comp_dir
;
6807 gdb_assert (cu
!= NULL
);
6809 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6810 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6811 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6813 if (this_cu
->is_debug_types
)
6815 struct signatured_type
*sig_type
;
6817 /* Since this_cu is the first member of struct signatured_type,
6818 we can go from a pointer to one to a pointer to the other. */
6819 sig_type
= (struct signatured_type
*) this_cu
;
6820 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6824 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6825 if (!signature
.has_value ())
6826 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6828 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6829 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6836 /* Subroutine of cutu_reader to simplify it.
6837 See it for a description of the parameters.
6838 Read a TU directly from a DWO file, bypassing the stub. */
6841 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6842 int use_existing_cu
)
6844 struct signatured_type
*sig_type
;
6846 /* Verify we can do the following downcast, and that we have the
6848 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6849 sig_type
= (struct signatured_type
*) this_cu
;
6850 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6852 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6854 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6855 /* There's no need to do the rereading_dwo_cu handling that
6856 cutu_reader does since we don't read the stub. */
6860 /* If !use_existing_cu, this_cu->cu must be NULL. */
6861 gdb_assert (this_cu
->cu
== NULL
);
6862 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6865 /* A future optimization, if needed, would be to use an existing
6866 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6867 could share abbrev tables. */
6869 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6870 NULL
/* stub_comp_unit_die */,
6871 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6874 &m_dwo_abbrev_table
) == 0)
6881 /* Initialize a CU (or TU) and read its DIEs.
6882 If the CU defers to a DWO file, read the DWO file as well.
6884 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6885 Otherwise the table specified in the comp unit header is read in and used.
6886 This is an optimization for when we already have the abbrev table.
6888 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6889 Otherwise, a new CU is allocated with xmalloc. */
6891 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6892 struct abbrev_table
*abbrev_table
,
6893 int use_existing_cu
,
6895 : die_reader_specs
{},
6898 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6899 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6900 struct dwarf2_section_info
*section
= this_cu
->section
;
6901 bfd
*abfd
= section
->get_bfd_owner ();
6902 struct dwarf2_cu
*cu
;
6903 const gdb_byte
*begin_info_ptr
;
6904 struct signatured_type
*sig_type
= NULL
;
6905 struct dwarf2_section_info
*abbrev_section
;
6906 /* Non-zero if CU currently points to a DWO file and we need to
6907 reread it. When this happens we need to reread the skeleton die
6908 before we can reread the DWO file (this only applies to CUs, not TUs). */
6909 int rereading_dwo_cu
= 0;
6911 if (dwarf_die_debug
)
6912 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6913 this_cu
->is_debug_types
? "type" : "comp",
6914 sect_offset_str (this_cu
->sect_off
));
6916 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6917 file (instead of going through the stub), short-circuit all of this. */
6918 if (this_cu
->reading_dwo_directly
)
6920 /* Narrow down the scope of possibilities to have to understand. */
6921 gdb_assert (this_cu
->is_debug_types
);
6922 gdb_assert (abbrev_table
== NULL
);
6923 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6927 /* This is cheap if the section is already read in. */
6928 section
->read (objfile
);
6930 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6932 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6934 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6937 /* If this CU is from a DWO file we need to start over, we need to
6938 refetch the attributes from the skeleton CU.
6939 This could be optimized by retrieving those attributes from when we
6940 were here the first time: the previous comp_unit_die was stored in
6941 comp_unit_obstack. But there's no data yet that we need this
6943 if (cu
->dwo_unit
!= NULL
)
6944 rereading_dwo_cu
= 1;
6948 /* If !use_existing_cu, this_cu->cu must be NULL. */
6949 gdb_assert (this_cu
->cu
== NULL
);
6950 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6951 cu
= m_new_cu
.get ();
6954 /* Get the header. */
6955 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6957 /* We already have the header, there's no need to read it in again. */
6958 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6962 if (this_cu
->is_debug_types
)
6964 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6965 &cu
->header
, section
,
6966 abbrev_section
, info_ptr
,
6969 /* Since per_cu is the first member of struct signatured_type,
6970 we can go from a pointer to one to a pointer to the other. */
6971 sig_type
= (struct signatured_type
*) this_cu
;
6972 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6973 gdb_assert (sig_type
->type_offset_in_tu
6974 == cu
->header
.type_cu_offset_in_tu
);
6975 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6977 /* LENGTH has not been set yet for type units if we're
6978 using .gdb_index. */
6979 this_cu
->length
= cu
->header
.get_length ();
6981 /* Establish the type offset that can be used to lookup the type. */
6982 sig_type
->type_offset_in_section
=
6983 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6985 this_cu
->dwarf_version
= cu
->header
.version
;
6989 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6990 &cu
->header
, section
,
6993 rcuh_kind::COMPILE
);
6995 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6996 if (this_cu
->length
== 0)
6997 this_cu
->length
= cu
->header
.get_length ();
6999 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7000 this_cu
->dwarf_version
= cu
->header
.version
;
7004 /* Skip dummy compilation units. */
7005 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7006 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7012 /* If we don't have them yet, read the abbrevs for this compilation unit.
7013 And if we need to read them now, make sure they're freed when we're
7015 if (abbrev_table
!= NULL
)
7016 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7019 m_abbrev_table_holder
7020 = abbrev_table::read (objfile
, abbrev_section
,
7021 cu
->header
.abbrev_sect_off
);
7022 abbrev_table
= m_abbrev_table_holder
.get ();
7025 /* Read the top level CU/TU die. */
7026 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7027 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7029 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7035 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7036 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7037 table from the DWO file and pass the ownership over to us. It will be
7038 referenced from READER, so we must make sure to free it after we're done
7041 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7042 DWO CU, that this test will fail (the attribute will not be present). */
7043 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7044 if (dwo_name
!= nullptr)
7046 struct dwo_unit
*dwo_unit
;
7047 struct die_info
*dwo_comp_unit_die
;
7049 if (comp_unit_die
->has_children
)
7051 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7052 " has children (offset %s) [in module %s]"),
7053 sect_offset_str (this_cu
->sect_off
),
7054 bfd_get_filename (abfd
));
7056 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
7057 if (dwo_unit
!= NULL
)
7059 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7060 comp_unit_die
, NULL
,
7063 &m_dwo_abbrev_table
) == 0)
7069 comp_unit_die
= dwo_comp_unit_die
;
7073 /* Yikes, we couldn't find the rest of the DIE, we only have
7074 the stub. A complaint has already been logged. There's
7075 not much more we can do except pass on the stub DIE to
7076 die_reader_func. We don't want to throw an error on bad
7083 cutu_reader::keep ()
7085 /* Done, clean up. */
7086 gdb_assert (!dummy_p
);
7087 if (m_new_cu
!= NULL
)
7089 struct dwarf2_per_objfile
*dwarf2_per_objfile
7090 = m_this_cu
->dwarf2_per_objfile
;
7091 /* Link this CU into read_in_chain. */
7092 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7093 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7094 /* The chain owns it now. */
7095 m_new_cu
.release ();
7099 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7100 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7101 assumed to have already done the lookup to find the DWO file).
7103 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7104 THIS_CU->is_debug_types, but nothing else.
7106 We fill in THIS_CU->length.
7108 THIS_CU->cu is always freed when done.
7109 This is done in order to not leave THIS_CU->cu in a state where we have
7110 to care whether it refers to the "main" CU or the DWO CU.
7112 When parent_cu is passed, it is used to provide a default value for
7113 str_offsets_base and addr_base from the parent. */
7115 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7116 struct dwarf2_cu
*parent_cu
,
7117 struct dwo_file
*dwo_file
)
7118 : die_reader_specs
{},
7121 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7122 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7123 struct dwarf2_section_info
*section
= this_cu
->section
;
7124 bfd
*abfd
= section
->get_bfd_owner ();
7125 struct dwarf2_section_info
*abbrev_section
;
7126 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7128 if (dwarf_die_debug
)
7129 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7130 this_cu
->is_debug_types
? "type" : "comp",
7131 sect_offset_str (this_cu
->sect_off
));
7133 gdb_assert (this_cu
->cu
== NULL
);
7135 abbrev_section
= (dwo_file
!= NULL
7136 ? &dwo_file
->sections
.abbrev
7137 : get_abbrev_section_for_cu (this_cu
));
7139 /* This is cheap if the section is already read in. */
7140 section
->read (objfile
);
7142 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7144 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7145 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7146 &m_new_cu
->header
, section
,
7147 abbrev_section
, info_ptr
,
7148 (this_cu
->is_debug_types
7150 : rcuh_kind::COMPILE
));
7152 if (parent_cu
!= nullptr)
7154 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7155 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7157 this_cu
->length
= m_new_cu
->header
.get_length ();
7159 /* Skip dummy compilation units. */
7160 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7161 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7167 m_abbrev_table_holder
7168 = abbrev_table::read (objfile
, abbrev_section
,
7169 m_new_cu
->header
.abbrev_sect_off
);
7171 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7172 m_abbrev_table_holder
.get ());
7173 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7177 /* Type Unit Groups.
7179 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7180 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7181 so that all types coming from the same compilation (.o file) are grouped
7182 together. A future step could be to put the types in the same symtab as
7183 the CU the types ultimately came from. */
7186 hash_type_unit_group (const void *item
)
7188 const struct type_unit_group
*tu_group
7189 = (const struct type_unit_group
*) item
;
7191 return hash_stmt_list_entry (&tu_group
->hash
);
7195 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7197 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7198 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7200 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7203 /* Allocate a hash table for type unit groups. */
7206 allocate_type_unit_groups_table ()
7208 return htab_up (htab_create_alloc (3,
7209 hash_type_unit_group
,
7211 NULL
, xcalloc
, xfree
));
7214 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7215 partial symtabs. We combine several TUs per psymtab to not let the size
7216 of any one psymtab grow too big. */
7217 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7218 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7220 /* Helper routine for get_type_unit_group.
7221 Create the type_unit_group object used to hold one or more TUs. */
7223 static struct type_unit_group
*
7224 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7226 struct dwarf2_per_objfile
*dwarf2_per_objfile
7227 = cu
->per_cu
->dwarf2_per_objfile
;
7228 struct dwarf2_per_cu_data
*per_cu
;
7229 struct type_unit_group
*tu_group
;
7231 tu_group
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
7232 struct type_unit_group
);
7233 per_cu
= &tu_group
->per_cu
;
7234 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7236 if (dwarf2_per_objfile
->using_index
)
7238 per_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
7239 struct dwarf2_per_cu_quick_data
);
7243 unsigned int line_offset
= to_underlying (line_offset_struct
);
7244 dwarf2_psymtab
*pst
;
7247 /* Give the symtab a useful name for debug purposes. */
7248 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7249 name
= string_printf ("<type_units_%d>",
7250 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7252 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7254 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7255 pst
->anonymous
= true;
7258 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7259 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7264 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7265 STMT_LIST is a DW_AT_stmt_list attribute. */
7267 static struct type_unit_group
*
7268 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7270 struct dwarf2_per_objfile
*dwarf2_per_objfile
7271 = cu
->per_cu
->dwarf2_per_objfile
;
7272 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7273 struct type_unit_group
*tu_group
;
7275 unsigned int line_offset
;
7276 struct type_unit_group type_unit_group_for_lookup
;
7278 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7279 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7281 /* Do we need to create a new group, or can we use an existing one? */
7285 line_offset
= DW_UNSND (stmt_list
);
7286 ++tu_stats
->nr_symtab_sharers
;
7290 /* Ugh, no stmt_list. Rare, but we have to handle it.
7291 We can do various things here like create one group per TU or
7292 spread them over multiple groups to split up the expansion work.
7293 To avoid worst case scenarios (too many groups or too large groups)
7294 we, umm, group them in bunches. */
7295 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7296 | (tu_stats
->nr_stmt_less_type_units
7297 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7298 ++tu_stats
->nr_stmt_less_type_units
;
7301 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7302 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7303 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7304 &type_unit_group_for_lookup
, INSERT
);
7307 tu_group
= (struct type_unit_group
*) *slot
;
7308 gdb_assert (tu_group
!= NULL
);
7312 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7313 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7315 ++tu_stats
->nr_symtabs
;
7321 /* Partial symbol tables. */
7323 /* Create a psymtab named NAME and assign it to PER_CU.
7325 The caller must fill in the following details:
7326 dirname, textlow, texthigh. */
7328 static dwarf2_psymtab
*
7329 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7331 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7332 dwarf2_psymtab
*pst
;
7334 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7336 pst
->psymtabs_addrmap_supported
= true;
7338 /* This is the glue that links PST into GDB's symbol API. */
7339 per_cu
->v
.psymtab
= pst
;
7344 /* DIE reader function for process_psymtab_comp_unit. */
7347 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7348 const gdb_byte
*info_ptr
,
7349 struct die_info
*comp_unit_die
,
7350 enum language pretend_language
)
7352 struct dwarf2_cu
*cu
= reader
->cu
;
7353 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7354 struct gdbarch
*gdbarch
= objfile
->arch ();
7355 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7357 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7358 dwarf2_psymtab
*pst
;
7359 enum pc_bounds_kind cu_bounds_kind
;
7360 const char *filename
;
7362 gdb_assert (! per_cu
->is_debug_types
);
7364 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7366 /* Allocate a new partial symbol table structure. */
7367 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7368 static const char artificial
[] = "<artificial>";
7369 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7370 if (filename
== NULL
)
7372 else if (strcmp (filename
, artificial
) == 0)
7374 debug_filename
.reset (concat (artificial
, "@",
7375 sect_offset_str (per_cu
->sect_off
),
7377 filename
= debug_filename
.get ();
7380 pst
= create_partial_symtab (per_cu
, filename
);
7382 /* This must be done before calling dwarf2_build_include_psymtabs. */
7383 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7385 baseaddr
= objfile
->text_section_offset ();
7387 dwarf2_find_base_address (comp_unit_die
, cu
);
7389 /* Possibly set the default values of LOWPC and HIGHPC from
7391 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7392 &best_highpc
, cu
, pst
);
7393 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7396 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7399 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7401 /* Store the contiguous range if it is not empty; it can be
7402 empty for CUs with no code. */
7403 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7407 /* Check if comp unit has_children.
7408 If so, read the rest of the partial symbols from this comp unit.
7409 If not, there's no more debug_info for this comp unit. */
7410 if (comp_unit_die
->has_children
)
7412 struct partial_die_info
*first_die
;
7413 CORE_ADDR lowpc
, highpc
;
7415 lowpc
= ((CORE_ADDR
) -1);
7416 highpc
= ((CORE_ADDR
) 0);
7418 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7420 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7421 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7423 /* If we didn't find a lowpc, set it to highpc to avoid
7424 complaints from `maint check'. */
7425 if (lowpc
== ((CORE_ADDR
) -1))
7428 /* If the compilation unit didn't have an explicit address range,
7429 then use the information extracted from its child dies. */
7430 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7433 best_highpc
= highpc
;
7436 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7437 best_lowpc
+ baseaddr
)
7439 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7440 best_highpc
+ baseaddr
)
7443 end_psymtab_common (objfile
, pst
);
7445 if (!cu
->per_cu
->imported_symtabs_empty ())
7448 int len
= cu
->per_cu
->imported_symtabs_size ();
7450 /* Fill in 'dependencies' here; we fill in 'users' in a
7452 pst
->number_of_dependencies
= len
;
7454 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7455 for (i
= 0; i
< len
; ++i
)
7457 pst
->dependencies
[i
]
7458 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7461 cu
->per_cu
->imported_symtabs_free ();
7464 /* Get the list of files included in the current compilation unit,
7465 and build a psymtab for each of them. */
7466 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7468 if (dwarf_read_debug
)
7469 fprintf_unfiltered (gdb_stdlog
,
7470 "Psymtab for %s unit @%s: %s - %s"
7471 ", %d global, %d static syms\n",
7472 per_cu
->is_debug_types
? "type" : "comp",
7473 sect_offset_str (per_cu
->sect_off
),
7474 paddress (gdbarch
, pst
->text_low (objfile
)),
7475 paddress (gdbarch
, pst
->text_high (objfile
)),
7476 pst
->n_global_syms
, pst
->n_static_syms
);
7479 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7480 Process compilation unit THIS_CU for a psymtab. */
7483 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7484 bool want_partial_unit
,
7485 enum language pretend_language
)
7487 /* If this compilation unit was already read in, free the
7488 cached copy in order to read it in again. This is
7489 necessary because we skipped some symbols when we first
7490 read in the compilation unit (see load_partial_dies).
7491 This problem could be avoided, but the benefit is unclear. */
7492 if (this_cu
->cu
!= NULL
)
7493 free_one_cached_comp_unit (this_cu
);
7495 cutu_reader
reader (this_cu
, NULL
, 0, false);
7497 switch (reader
.comp_unit_die
->tag
)
7499 case DW_TAG_compile_unit
:
7500 this_cu
->unit_type
= DW_UT_compile
;
7502 case DW_TAG_partial_unit
:
7503 this_cu
->unit_type
= DW_UT_partial
;
7513 else if (this_cu
->is_debug_types
)
7514 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7515 reader
.comp_unit_die
);
7516 else if (want_partial_unit
7517 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7518 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7519 reader
.comp_unit_die
,
7522 this_cu
->lang
= this_cu
->cu
->language
;
7524 /* Age out any secondary CUs. */
7525 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7528 /* Reader function for build_type_psymtabs. */
7531 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7532 const gdb_byte
*info_ptr
,
7533 struct die_info
*type_unit_die
)
7535 struct dwarf2_per_objfile
*dwarf2_per_objfile
7536 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7537 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7538 struct dwarf2_cu
*cu
= reader
->cu
;
7539 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7540 struct signatured_type
*sig_type
;
7541 struct type_unit_group
*tu_group
;
7542 struct attribute
*attr
;
7543 struct partial_die_info
*first_die
;
7544 CORE_ADDR lowpc
, highpc
;
7545 dwarf2_psymtab
*pst
;
7547 gdb_assert (per_cu
->is_debug_types
);
7548 sig_type
= (struct signatured_type
*) per_cu
;
7550 if (! type_unit_die
->has_children
)
7553 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7554 tu_group
= get_type_unit_group (cu
, attr
);
7556 if (tu_group
->tus
== nullptr)
7557 tu_group
->tus
= new std::vector
<signatured_type
*>;
7558 tu_group
->tus
->push_back (sig_type
);
7560 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7561 pst
= create_partial_symtab (per_cu
, "");
7562 pst
->anonymous
= true;
7564 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7566 lowpc
= (CORE_ADDR
) -1;
7567 highpc
= (CORE_ADDR
) 0;
7568 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7570 end_psymtab_common (objfile
, pst
);
7573 /* Struct used to sort TUs by their abbreviation table offset. */
7575 struct tu_abbrev_offset
7577 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7578 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7581 signatured_type
*sig_type
;
7582 sect_offset abbrev_offset
;
7585 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7588 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7589 const struct tu_abbrev_offset
&b
)
7591 return a
.abbrev_offset
< b
.abbrev_offset
;
7594 /* Efficiently read all the type units.
7595 This does the bulk of the work for build_type_psymtabs.
7597 The efficiency is because we sort TUs by the abbrev table they use and
7598 only read each abbrev table once. In one program there are 200K TUs
7599 sharing 8K abbrev tables.
7601 The main purpose of this function is to support building the
7602 dwarf2_per_objfile->type_unit_groups table.
7603 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7604 can collapse the search space by grouping them by stmt_list.
7605 The savings can be significant, in the same program from above the 200K TUs
7606 share 8K stmt_list tables.
7608 FUNC is expected to call get_type_unit_group, which will create the
7609 struct type_unit_group if necessary and add it to
7610 dwarf2_per_objfile->type_unit_groups. */
7613 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7615 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7616 abbrev_table_up abbrev_table
;
7617 sect_offset abbrev_offset
;
7619 /* It's up to the caller to not call us multiple times. */
7620 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7622 if (dwarf2_per_objfile
->all_type_units
.empty ())
7625 /* TUs typically share abbrev tables, and there can be way more TUs than
7626 abbrev tables. Sort by abbrev table to reduce the number of times we
7627 read each abbrev table in.
7628 Alternatives are to punt or to maintain a cache of abbrev tables.
7629 This is simpler and efficient enough for now.
7631 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7632 symtab to use). Typically TUs with the same abbrev offset have the same
7633 stmt_list value too so in practice this should work well.
7635 The basic algorithm here is:
7637 sort TUs by abbrev table
7638 for each TU with same abbrev table:
7639 read abbrev table if first user
7640 read TU top level DIE
7641 [IWBN if DWO skeletons had DW_AT_stmt_list]
7644 if (dwarf_read_debug
)
7645 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7647 /* Sort in a separate table to maintain the order of all_type_units
7648 for .gdb_index: TU indices directly index all_type_units. */
7649 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7650 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7652 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7653 sorted_by_abbrev
.emplace_back
7654 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7655 sig_type
->per_cu
.section
,
7656 sig_type
->per_cu
.sect_off
));
7658 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7659 sort_tu_by_abbrev_offset
);
7661 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7663 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7665 /* Switch to the next abbrev table if necessary. */
7666 if (abbrev_table
== NULL
7667 || tu
.abbrev_offset
!= abbrev_offset
)
7669 abbrev_offset
= tu
.abbrev_offset
;
7671 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7672 &dwarf2_per_objfile
->abbrev
,
7674 ++tu_stats
->nr_uniq_abbrev_tables
;
7677 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7679 if (!reader
.dummy_p
)
7680 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7681 reader
.comp_unit_die
);
7685 /* Print collected type unit statistics. */
7688 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7690 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7692 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7693 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7694 dwarf2_per_objfile
->all_type_units
.size ());
7695 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7696 tu_stats
->nr_uniq_abbrev_tables
);
7697 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7698 tu_stats
->nr_symtabs
);
7699 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7700 tu_stats
->nr_symtab_sharers
);
7701 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7702 tu_stats
->nr_stmt_less_type_units
);
7703 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7704 tu_stats
->nr_all_type_units_reallocs
);
7707 /* Traversal function for build_type_psymtabs. */
7710 build_type_psymtab_dependencies (void **slot
, void *info
)
7712 struct dwarf2_per_objfile
*dwarf2_per_objfile
7713 = (struct dwarf2_per_objfile
*) info
;
7714 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7715 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7716 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7717 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7718 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7721 gdb_assert (len
> 0);
7722 gdb_assert (per_cu
->type_unit_group_p ());
7724 pst
->number_of_dependencies
= len
;
7725 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7726 for (i
= 0; i
< len
; ++i
)
7728 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7729 gdb_assert (iter
->per_cu
.is_debug_types
);
7730 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7731 iter
->type_unit_group
= tu_group
;
7734 delete tu_group
->tus
;
7735 tu_group
->tus
= nullptr;
7740 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7741 Build partial symbol tables for the .debug_types comp-units. */
7744 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7746 if (! create_all_type_units (dwarf2_per_objfile
))
7749 build_type_psymtabs_1 (dwarf2_per_objfile
);
7752 /* Traversal function for process_skeletonless_type_unit.
7753 Read a TU in a DWO file and build partial symbols for it. */
7756 process_skeletonless_type_unit (void **slot
, void *info
)
7758 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7759 struct dwarf2_per_objfile
*dwarf2_per_objfile
7760 = (struct dwarf2_per_objfile
*) info
;
7761 struct signatured_type find_entry
, *entry
;
7763 /* If this TU doesn't exist in the global table, add it and read it in. */
7765 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7766 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7768 find_entry
.signature
= dwo_unit
->signature
;
7769 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7770 &find_entry
, INSERT
);
7771 /* If we've already seen this type there's nothing to do. What's happening
7772 is we're doing our own version of comdat-folding here. */
7776 /* This does the job that create_all_type_units would have done for
7778 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7779 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7782 /* This does the job that build_type_psymtabs_1 would have done. */
7783 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7784 if (!reader
.dummy_p
)
7785 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7786 reader
.comp_unit_die
);
7791 /* Traversal function for process_skeletonless_type_units. */
7794 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7796 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7798 if (dwo_file
->tus
!= NULL
)
7799 htab_traverse_noresize (dwo_file
->tus
.get (),
7800 process_skeletonless_type_unit
, info
);
7805 /* Scan all TUs of DWO files, verifying we've processed them.
7806 This is needed in case a TU was emitted without its skeleton.
7807 Note: This can't be done until we know what all the DWO files are. */
7810 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7812 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7813 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7814 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7816 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7817 process_dwo_file_for_skeletonless_type_units
,
7818 dwarf2_per_objfile
);
7822 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7825 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7827 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7829 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7834 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7836 /* Set the 'user' field only if it is not already set. */
7837 if (pst
->dependencies
[j
]->user
== NULL
)
7838 pst
->dependencies
[j
]->user
= pst
;
7843 /* Build the partial symbol table by doing a quick pass through the
7844 .debug_info and .debug_abbrev sections. */
7847 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7849 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7851 if (dwarf_read_debug
)
7853 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7854 objfile_name (objfile
));
7857 scoped_restore restore_reading_psyms
7858 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7861 dwarf2_per_objfile
->info
.read (objfile
);
7863 /* Any cached compilation units will be linked by the per-objfile
7864 read_in_chain. Make sure to free them when we're done. */
7865 free_cached_comp_units
freer (dwarf2_per_objfile
);
7867 build_type_psymtabs (dwarf2_per_objfile
);
7869 create_all_comp_units (dwarf2_per_objfile
);
7871 /* Create a temporary address map on a temporary obstack. We later
7872 copy this to the final obstack. */
7873 auto_obstack temp_obstack
;
7875 scoped_restore save_psymtabs_addrmap
7876 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7877 addrmap_create_mutable (&temp_obstack
));
7879 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7881 if (per_cu
->v
.psymtab
!= NULL
)
7882 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7884 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7887 /* This has to wait until we read the CUs, we need the list of DWOs. */
7888 process_skeletonless_type_units (dwarf2_per_objfile
);
7890 /* Now that all TUs have been processed we can fill in the dependencies. */
7891 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7893 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7894 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7897 if (dwarf_read_debug
)
7898 print_tu_stats (dwarf2_per_objfile
);
7900 set_partial_user (dwarf2_per_objfile
);
7902 objfile
->partial_symtabs
->psymtabs_addrmap
7903 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7904 objfile
->partial_symtabs
->obstack ());
7905 /* At this point we want to keep the address map. */
7906 save_psymtabs_addrmap
.release ();
7908 if (dwarf_read_debug
)
7909 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7910 objfile_name (objfile
));
7913 /* Load the partial DIEs for a secondary CU into memory.
7914 This is also used when rereading a primary CU with load_all_dies. */
7917 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7919 cutu_reader
reader (this_cu
, NULL
, 1, false);
7921 if (!reader
.dummy_p
)
7923 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7926 /* Check if comp unit has_children.
7927 If so, read the rest of the partial symbols from this comp unit.
7928 If not, there's no more debug_info for this comp unit. */
7929 if (reader
.comp_unit_die
->has_children
)
7930 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7937 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7938 struct dwarf2_section_info
*section
,
7939 struct dwarf2_section_info
*abbrev_section
,
7940 unsigned int is_dwz
)
7942 const gdb_byte
*info_ptr
;
7943 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7945 if (dwarf_read_debug
)
7946 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7947 section
->get_name (),
7948 section
->get_file_name ());
7950 section
->read (objfile
);
7952 info_ptr
= section
->buffer
;
7954 while (info_ptr
< section
->buffer
+ section
->size
)
7956 struct dwarf2_per_cu_data
*this_cu
;
7958 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7960 comp_unit_head cu_header
;
7961 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7962 abbrev_section
, info_ptr
,
7963 rcuh_kind::COMPILE
);
7965 /* Save the compilation unit for later lookup. */
7966 if (cu_header
.unit_type
!= DW_UT_type
)
7968 this_cu
= XOBNEW (&dwarf2_per_objfile
->obstack
,
7969 struct dwarf2_per_cu_data
);
7970 memset (this_cu
, 0, sizeof (*this_cu
));
7974 auto sig_type
= XOBNEW (&dwarf2_per_objfile
->obstack
,
7975 struct signatured_type
);
7976 memset (sig_type
, 0, sizeof (*sig_type
));
7977 sig_type
->signature
= cu_header
.signature
;
7978 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7979 this_cu
= &sig_type
->per_cu
;
7981 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7982 this_cu
->sect_off
= sect_off
;
7983 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7984 this_cu
->is_dwz
= is_dwz
;
7985 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7986 this_cu
->section
= section
;
7988 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
7990 info_ptr
= info_ptr
+ this_cu
->length
;
7994 /* Create a list of all compilation units in OBJFILE.
7995 This is only done for -readnow and building partial symtabs. */
7998 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8000 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8001 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8002 &dwarf2_per_objfile
->abbrev
, 0);
8004 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8006 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8010 /* Process all loaded DIEs for compilation unit CU, starting at
8011 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8012 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8013 DW_AT_ranges). See the comments of add_partial_subprogram on how
8014 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8017 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8018 CORE_ADDR
*highpc
, int set_addrmap
,
8019 struct dwarf2_cu
*cu
)
8021 struct partial_die_info
*pdi
;
8023 /* Now, march along the PDI's, descending into ones which have
8024 interesting children but skipping the children of the other ones,
8025 until we reach the end of the compilation unit. */
8033 /* Anonymous namespaces or modules have no name but have interesting
8034 children, so we need to look at them. Ditto for anonymous
8037 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8038 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8039 || pdi
->tag
== DW_TAG_imported_unit
8040 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8044 case DW_TAG_subprogram
:
8045 case DW_TAG_inlined_subroutine
:
8046 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8048 case DW_TAG_constant
:
8049 case DW_TAG_variable
:
8050 case DW_TAG_typedef
:
8051 case DW_TAG_union_type
:
8052 if (!pdi
->is_declaration
8053 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8055 add_partial_symbol (pdi
, cu
);
8058 case DW_TAG_class_type
:
8059 case DW_TAG_interface_type
:
8060 case DW_TAG_structure_type
:
8061 if (!pdi
->is_declaration
)
8063 add_partial_symbol (pdi
, cu
);
8065 if ((cu
->language
== language_rust
8066 || cu
->language
== language_cplus
) && pdi
->has_children
)
8067 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8070 case DW_TAG_enumeration_type
:
8071 if (!pdi
->is_declaration
)
8072 add_partial_enumeration (pdi
, cu
);
8074 case DW_TAG_base_type
:
8075 case DW_TAG_subrange_type
:
8076 /* File scope base type definitions are added to the partial
8078 add_partial_symbol (pdi
, cu
);
8080 case DW_TAG_namespace
:
8081 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8084 if (!pdi
->is_declaration
)
8085 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8087 case DW_TAG_imported_unit
:
8089 struct dwarf2_per_cu_data
*per_cu
;
8091 /* For now we don't handle imported units in type units. */
8092 if (cu
->per_cu
->is_debug_types
)
8094 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8095 " supported in type units [in module %s]"),
8096 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8099 per_cu
= dwarf2_find_containing_comp_unit
8100 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8101 cu
->per_cu
->dwarf2_per_objfile
);
8103 /* Go read the partial unit, if needed. */
8104 if (per_cu
->v
.psymtab
== NULL
)
8105 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8107 cu
->per_cu
->imported_symtabs_push (per_cu
);
8110 case DW_TAG_imported_declaration
:
8111 add_partial_symbol (pdi
, cu
);
8118 /* If the die has a sibling, skip to the sibling. */
8120 pdi
= pdi
->die_sibling
;
8124 /* Functions used to compute the fully scoped name of a partial DIE.
8126 Normally, this is simple. For C++, the parent DIE's fully scoped
8127 name is concatenated with "::" and the partial DIE's name.
8128 Enumerators are an exception; they use the scope of their parent
8129 enumeration type, i.e. the name of the enumeration type is not
8130 prepended to the enumerator.
8132 There are two complexities. One is DW_AT_specification; in this
8133 case "parent" means the parent of the target of the specification,
8134 instead of the direct parent of the DIE. The other is compilers
8135 which do not emit DW_TAG_namespace; in this case we try to guess
8136 the fully qualified name of structure types from their members'
8137 linkage names. This must be done using the DIE's children rather
8138 than the children of any DW_AT_specification target. We only need
8139 to do this for structures at the top level, i.e. if the target of
8140 any DW_AT_specification (if any; otherwise the DIE itself) does not
8143 /* Compute the scope prefix associated with PDI's parent, in
8144 compilation unit CU. The result will be allocated on CU's
8145 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8146 field. NULL is returned if no prefix is necessary. */
8148 partial_die_parent_scope (struct partial_die_info
*pdi
,
8149 struct dwarf2_cu
*cu
)
8151 const char *grandparent_scope
;
8152 struct partial_die_info
*parent
, *real_pdi
;
8154 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8155 then this means the parent of the specification DIE. */
8158 while (real_pdi
->has_specification
)
8160 auto res
= find_partial_die (real_pdi
->spec_offset
,
8161 real_pdi
->spec_is_dwz
, cu
);
8166 parent
= real_pdi
->die_parent
;
8170 if (parent
->scope_set
)
8171 return parent
->scope
;
8175 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8177 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8178 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8179 Work around this problem here. */
8180 if (cu
->language
== language_cplus
8181 && parent
->tag
== DW_TAG_namespace
8182 && strcmp (parent
->name
, "::") == 0
8183 && grandparent_scope
== NULL
)
8185 parent
->scope
= NULL
;
8186 parent
->scope_set
= 1;
8190 /* Nested subroutines in Fortran get a prefix. */
8191 if (pdi
->tag
== DW_TAG_enumerator
)
8192 /* Enumerators should not get the name of the enumeration as a prefix. */
8193 parent
->scope
= grandparent_scope
;
8194 else if (parent
->tag
== DW_TAG_namespace
8195 || parent
->tag
== DW_TAG_module
8196 || parent
->tag
== DW_TAG_structure_type
8197 || parent
->tag
== DW_TAG_class_type
8198 || parent
->tag
== DW_TAG_interface_type
8199 || parent
->tag
== DW_TAG_union_type
8200 || parent
->tag
== DW_TAG_enumeration_type
8201 || (cu
->language
== language_fortran
8202 && parent
->tag
== DW_TAG_subprogram
8203 && pdi
->tag
== DW_TAG_subprogram
))
8205 if (grandparent_scope
== NULL
)
8206 parent
->scope
= parent
->name
;
8208 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8210 parent
->name
, 0, cu
);
8214 /* FIXME drow/2004-04-01: What should we be doing with
8215 function-local names? For partial symbols, we should probably be
8217 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8218 dwarf_tag_name (parent
->tag
),
8219 sect_offset_str (pdi
->sect_off
));
8220 parent
->scope
= grandparent_scope
;
8223 parent
->scope_set
= 1;
8224 return parent
->scope
;
8227 /* Return the fully scoped name associated with PDI, from compilation unit
8228 CU. The result will be allocated with malloc. */
8230 static gdb::unique_xmalloc_ptr
<char>
8231 partial_die_full_name (struct partial_die_info
*pdi
,
8232 struct dwarf2_cu
*cu
)
8234 const char *parent_scope
;
8236 /* If this is a template instantiation, we can not work out the
8237 template arguments from partial DIEs. So, unfortunately, we have
8238 to go through the full DIEs. At least any work we do building
8239 types here will be reused if full symbols are loaded later. */
8240 if (pdi
->has_template_arguments
)
8244 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8246 struct die_info
*die
;
8247 struct attribute attr
;
8248 struct dwarf2_cu
*ref_cu
= cu
;
8250 /* DW_FORM_ref_addr is using section offset. */
8251 attr
.name
= (enum dwarf_attribute
) 0;
8252 attr
.form
= DW_FORM_ref_addr
;
8253 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8254 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8256 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8260 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8261 if (parent_scope
== NULL
)
8264 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8269 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8271 struct dwarf2_per_objfile
*dwarf2_per_objfile
8272 = cu
->per_cu
->dwarf2_per_objfile
;
8273 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8274 struct gdbarch
*gdbarch
= objfile
->arch ();
8276 const char *actual_name
= NULL
;
8279 baseaddr
= objfile
->text_section_offset ();
8281 gdb::unique_xmalloc_ptr
<char> built_actual_name
8282 = partial_die_full_name (pdi
, cu
);
8283 if (built_actual_name
!= NULL
)
8284 actual_name
= built_actual_name
.get ();
8286 if (actual_name
== NULL
)
8287 actual_name
= pdi
->name
;
8289 partial_symbol psymbol
;
8290 memset (&psymbol
, 0, sizeof (psymbol
));
8291 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8292 psymbol
.ginfo
.section
= -1;
8294 /* The code below indicates that the psymbol should be installed by
8296 gdb::optional
<psymbol_placement
> where
;
8300 case DW_TAG_inlined_subroutine
:
8301 case DW_TAG_subprogram
:
8302 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8304 if (pdi
->is_external
8305 || cu
->language
== language_ada
8306 || (cu
->language
== language_fortran
8307 && pdi
->die_parent
!= NULL
8308 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8310 /* Normally, only "external" DIEs are part of the global scope.
8311 But in Ada and Fortran, we want to be able to access nested
8312 procedures globally. So all Ada and Fortran subprograms are
8313 stored in the global scope. */
8314 where
= psymbol_placement::GLOBAL
;
8317 where
= psymbol_placement::STATIC
;
8319 psymbol
.domain
= VAR_DOMAIN
;
8320 psymbol
.aclass
= LOC_BLOCK
;
8321 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8322 psymbol
.ginfo
.value
.address
= addr
;
8324 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8325 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8327 case DW_TAG_constant
:
8328 psymbol
.domain
= VAR_DOMAIN
;
8329 psymbol
.aclass
= LOC_STATIC
;
8330 where
= (pdi
->is_external
8331 ? psymbol_placement::GLOBAL
8332 : psymbol_placement::STATIC
);
8334 case DW_TAG_variable
:
8336 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8340 && !dwarf2_per_objfile
->has_section_at_zero
)
8342 /* A global or static variable may also have been stripped
8343 out by the linker if unused, in which case its address
8344 will be nullified; do not add such variables into partial
8345 symbol table then. */
8347 else if (pdi
->is_external
)
8350 Don't enter into the minimal symbol tables as there is
8351 a minimal symbol table entry from the ELF symbols already.
8352 Enter into partial symbol table if it has a location
8353 descriptor or a type.
8354 If the location descriptor is missing, new_symbol will create
8355 a LOC_UNRESOLVED symbol, the address of the variable will then
8356 be determined from the minimal symbol table whenever the variable
8358 The address for the partial symbol table entry is not
8359 used by GDB, but it comes in handy for debugging partial symbol
8362 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8364 psymbol
.domain
= VAR_DOMAIN
;
8365 psymbol
.aclass
= LOC_STATIC
;
8366 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8367 psymbol
.ginfo
.value
.address
= addr
;
8368 where
= psymbol_placement::GLOBAL
;
8373 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8375 /* Static Variable. Skip symbols whose value we cannot know (those
8376 without location descriptors or constant values). */
8377 if (!has_loc
&& !pdi
->has_const_value
)
8380 psymbol
.domain
= VAR_DOMAIN
;
8381 psymbol
.aclass
= LOC_STATIC
;
8382 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8384 psymbol
.ginfo
.value
.address
= addr
;
8385 where
= psymbol_placement::STATIC
;
8388 case DW_TAG_typedef
:
8389 case DW_TAG_base_type
:
8390 case DW_TAG_subrange_type
:
8391 psymbol
.domain
= VAR_DOMAIN
;
8392 psymbol
.aclass
= LOC_TYPEDEF
;
8393 where
= psymbol_placement::STATIC
;
8395 case DW_TAG_imported_declaration
:
8396 case DW_TAG_namespace
:
8397 psymbol
.domain
= VAR_DOMAIN
;
8398 psymbol
.aclass
= LOC_TYPEDEF
;
8399 where
= psymbol_placement::GLOBAL
;
8402 /* With Fortran 77 there might be a "BLOCK DATA" module
8403 available without any name. If so, we skip the module as it
8404 doesn't bring any value. */
8405 if (actual_name
!= nullptr)
8407 psymbol
.domain
= MODULE_DOMAIN
;
8408 psymbol
.aclass
= LOC_TYPEDEF
;
8409 where
= psymbol_placement::GLOBAL
;
8412 case DW_TAG_class_type
:
8413 case DW_TAG_interface_type
:
8414 case DW_TAG_structure_type
:
8415 case DW_TAG_union_type
:
8416 case DW_TAG_enumeration_type
:
8417 /* Skip external references. The DWARF standard says in the section
8418 about "Structure, Union, and Class Type Entries": "An incomplete
8419 structure, union or class type is represented by a structure,
8420 union or class entry that does not have a byte size attribute
8421 and that has a DW_AT_declaration attribute." */
8422 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8425 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8426 static vs. global. */
8427 psymbol
.domain
= STRUCT_DOMAIN
;
8428 psymbol
.aclass
= LOC_TYPEDEF
;
8429 where
= (cu
->language
== language_cplus
8430 ? psymbol_placement::GLOBAL
8431 : psymbol_placement::STATIC
);
8433 case DW_TAG_enumerator
:
8434 psymbol
.domain
= VAR_DOMAIN
;
8435 psymbol
.aclass
= LOC_CONST
;
8436 where
= (cu
->language
== language_cplus
8437 ? psymbol_placement::GLOBAL
8438 : psymbol_placement::STATIC
);
8444 if (where
.has_value ())
8446 if (built_actual_name
!= nullptr)
8447 actual_name
= objfile
->intern (actual_name
);
8448 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8449 psymbol
.ginfo
.set_linkage_name (actual_name
);
8452 psymbol
.ginfo
.set_demangled_name (actual_name
,
8453 &objfile
->objfile_obstack
);
8454 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8456 add_psymbol_to_list (psymbol
, *where
, objfile
);
8460 /* Read a partial die corresponding to a namespace; also, add a symbol
8461 corresponding to that namespace to the symbol table. NAMESPACE is
8462 the name of the enclosing namespace. */
8465 add_partial_namespace (struct partial_die_info
*pdi
,
8466 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8467 int set_addrmap
, struct dwarf2_cu
*cu
)
8469 /* Add a symbol for the namespace. */
8471 add_partial_symbol (pdi
, cu
);
8473 /* Now scan partial symbols in that namespace. */
8475 if (pdi
->has_children
)
8476 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8479 /* Read a partial die corresponding to a Fortran module. */
8482 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8483 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8485 /* Add a symbol for the namespace. */
8487 add_partial_symbol (pdi
, cu
);
8489 /* Now scan partial symbols in that module. */
8491 if (pdi
->has_children
)
8492 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8495 /* Read a partial die corresponding to a subprogram or an inlined
8496 subprogram and create a partial symbol for that subprogram.
8497 When the CU language allows it, this routine also defines a partial
8498 symbol for each nested subprogram that this subprogram contains.
8499 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8500 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8502 PDI may also be a lexical block, in which case we simply search
8503 recursively for subprograms defined inside that lexical block.
8504 Again, this is only performed when the CU language allows this
8505 type of definitions. */
8508 add_partial_subprogram (struct partial_die_info
*pdi
,
8509 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8510 int set_addrmap
, struct dwarf2_cu
*cu
)
8512 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8514 if (pdi
->has_pc_info
)
8516 if (pdi
->lowpc
< *lowpc
)
8517 *lowpc
= pdi
->lowpc
;
8518 if (pdi
->highpc
> *highpc
)
8519 *highpc
= pdi
->highpc
;
8522 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8523 struct gdbarch
*gdbarch
= objfile
->arch ();
8525 CORE_ADDR this_highpc
;
8526 CORE_ADDR this_lowpc
;
8528 baseaddr
= objfile
->text_section_offset ();
8530 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8531 pdi
->lowpc
+ baseaddr
)
8534 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8535 pdi
->highpc
+ baseaddr
)
8537 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8538 this_lowpc
, this_highpc
- 1,
8539 cu
->per_cu
->v
.psymtab
);
8543 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8545 if (!pdi
->is_declaration
)
8546 /* Ignore subprogram DIEs that do not have a name, they are
8547 illegal. Do not emit a complaint at this point, we will
8548 do so when we convert this psymtab into a symtab. */
8550 add_partial_symbol (pdi
, cu
);
8554 if (! pdi
->has_children
)
8557 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8559 pdi
= pdi
->die_child
;
8563 if (pdi
->tag
== DW_TAG_subprogram
8564 || pdi
->tag
== DW_TAG_inlined_subroutine
8565 || pdi
->tag
== DW_TAG_lexical_block
)
8566 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8567 pdi
= pdi
->die_sibling
;
8572 /* Read a partial die corresponding to an enumeration type. */
8575 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8576 struct dwarf2_cu
*cu
)
8578 struct partial_die_info
*pdi
;
8580 if (enum_pdi
->name
!= NULL
)
8581 add_partial_symbol (enum_pdi
, cu
);
8583 pdi
= enum_pdi
->die_child
;
8586 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8587 complaint (_("malformed enumerator DIE ignored"));
8589 add_partial_symbol (pdi
, cu
);
8590 pdi
= pdi
->die_sibling
;
8594 /* Return the initial uleb128 in the die at INFO_PTR. */
8597 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8599 unsigned int bytes_read
;
8601 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8604 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8605 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8607 Return the corresponding abbrev, or NULL if the number is zero (indicating
8608 an empty DIE). In either case *BYTES_READ will be set to the length of
8609 the initial number. */
8611 static struct abbrev_info
*
8612 peek_die_abbrev (const die_reader_specs
&reader
,
8613 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8615 dwarf2_cu
*cu
= reader
.cu
;
8616 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8617 unsigned int abbrev_number
8618 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8620 if (abbrev_number
== 0)
8623 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8626 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8627 " at offset %s [in module %s]"),
8628 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8629 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8635 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8636 Returns a pointer to the end of a series of DIEs, terminated by an empty
8637 DIE. Any children of the skipped DIEs will also be skipped. */
8639 static const gdb_byte
*
8640 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8644 unsigned int bytes_read
;
8645 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8648 return info_ptr
+ bytes_read
;
8650 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8654 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8655 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8656 abbrev corresponding to that skipped uleb128 should be passed in
8657 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8660 static const gdb_byte
*
8661 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8662 struct abbrev_info
*abbrev
)
8664 unsigned int bytes_read
;
8665 struct attribute attr
;
8666 bfd
*abfd
= reader
->abfd
;
8667 struct dwarf2_cu
*cu
= reader
->cu
;
8668 const gdb_byte
*buffer
= reader
->buffer
;
8669 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8670 unsigned int form
, i
;
8672 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8674 /* The only abbrev we care about is DW_AT_sibling. */
8675 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8678 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8680 if (attr
.form
== DW_FORM_ref_addr
)
8681 complaint (_("ignoring absolute DW_AT_sibling"));
8684 sect_offset off
= attr
.get_ref_die_offset ();
8685 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8687 if (sibling_ptr
< info_ptr
)
8688 complaint (_("DW_AT_sibling points backwards"));
8689 else if (sibling_ptr
> reader
->buffer_end
)
8690 reader
->die_section
->overflow_complaint ();
8696 /* If it isn't DW_AT_sibling, skip this attribute. */
8697 form
= abbrev
->attrs
[i
].form
;
8701 case DW_FORM_ref_addr
:
8702 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8703 and later it is offset sized. */
8704 if (cu
->header
.version
== 2)
8705 info_ptr
+= cu
->header
.addr_size
;
8707 info_ptr
+= cu
->header
.offset_size
;
8709 case DW_FORM_GNU_ref_alt
:
8710 info_ptr
+= cu
->header
.offset_size
;
8713 info_ptr
+= cu
->header
.addr_size
;
8721 case DW_FORM_flag_present
:
8722 case DW_FORM_implicit_const
:
8739 case DW_FORM_ref_sig8
:
8742 case DW_FORM_data16
:
8745 case DW_FORM_string
:
8746 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8747 info_ptr
+= bytes_read
;
8749 case DW_FORM_sec_offset
:
8751 case DW_FORM_GNU_strp_alt
:
8752 info_ptr
+= cu
->header
.offset_size
;
8754 case DW_FORM_exprloc
:
8756 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8757 info_ptr
+= bytes_read
;
8759 case DW_FORM_block1
:
8760 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8762 case DW_FORM_block2
:
8763 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8765 case DW_FORM_block4
:
8766 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8772 case DW_FORM_ref_udata
:
8773 case DW_FORM_GNU_addr_index
:
8774 case DW_FORM_GNU_str_index
:
8775 case DW_FORM_rnglistx
:
8776 case DW_FORM_loclistx
:
8777 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8779 case DW_FORM_indirect
:
8780 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8781 info_ptr
+= bytes_read
;
8782 /* We need to continue parsing from here, so just go back to
8784 goto skip_attribute
;
8787 error (_("Dwarf Error: Cannot handle %s "
8788 "in DWARF reader [in module %s]"),
8789 dwarf_form_name (form
),
8790 bfd_get_filename (abfd
));
8794 if (abbrev
->has_children
)
8795 return skip_children (reader
, info_ptr
);
8800 /* Locate ORIG_PDI's sibling.
8801 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8803 static const gdb_byte
*
8804 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8805 struct partial_die_info
*orig_pdi
,
8806 const gdb_byte
*info_ptr
)
8808 /* Do we know the sibling already? */
8810 if (orig_pdi
->sibling
)
8811 return orig_pdi
->sibling
;
8813 /* Are there any children to deal with? */
8815 if (!orig_pdi
->has_children
)
8818 /* Skip the children the long way. */
8820 return skip_children (reader
, info_ptr
);
8823 /* Expand this partial symbol table into a full symbol table. SELF is
8827 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8829 struct dwarf2_per_objfile
*dwarf2_per_objfile
8830 = get_dwarf2_per_objfile (objfile
);
8832 gdb_assert (!readin
);
8833 /* If this psymtab is constructed from a debug-only objfile, the
8834 has_section_at_zero flag will not necessarily be correct. We
8835 can get the correct value for this flag by looking at the data
8836 associated with the (presumably stripped) associated objfile. */
8837 if (objfile
->separate_debug_objfile_backlink
)
8839 struct dwarf2_per_objfile
*dpo_backlink
8840 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8842 dwarf2_per_objfile
->has_section_at_zero
8843 = dpo_backlink
->has_section_at_zero
;
8846 expand_psymtab (objfile
);
8848 process_cu_includes (dwarf2_per_objfile
);
8851 /* Reading in full CUs. */
8853 /* Add PER_CU to the queue. */
8856 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8857 enum language pretend_language
)
8860 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
8863 /* If PER_CU is not yet queued, add it to the queue.
8864 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8866 The result is non-zero if PER_CU was queued, otherwise the result is zero
8867 meaning either PER_CU is already queued or it is already loaded.
8869 N.B. There is an invariant here that if a CU is queued then it is loaded.
8870 The caller is required to load PER_CU if we return non-zero. */
8873 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8874 struct dwarf2_per_cu_data
*per_cu
,
8875 enum language pretend_language
)
8877 /* We may arrive here during partial symbol reading, if we need full
8878 DIEs to process an unusual case (e.g. template arguments). Do
8879 not queue PER_CU, just tell our caller to load its DIEs. */
8880 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
8882 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8887 /* Mark the dependence relation so that we don't flush PER_CU
8889 if (dependent_cu
!= NULL
)
8890 dwarf2_add_dependence (dependent_cu
, per_cu
);
8892 /* If it's already on the queue, we have nothing to do. */
8896 /* If the compilation unit is already loaded, just mark it as
8898 if (per_cu
->cu
!= NULL
)
8900 per_cu
->cu
->last_used
= 0;
8904 /* Add it to the queue. */
8905 queue_comp_unit (per_cu
, pretend_language
);
8910 /* Process the queue. */
8913 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8915 if (dwarf_read_debug
)
8917 fprintf_unfiltered (gdb_stdlog
,
8918 "Expanding one or more symtabs of objfile %s ...\n",
8919 objfile_name (dwarf2_per_objfile
->objfile
));
8922 /* The queue starts out with one item, but following a DIE reference
8923 may load a new CU, adding it to the end of the queue. */
8924 while (!dwarf2_per_objfile
->queue
.empty ())
8926 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
8928 if ((dwarf2_per_objfile
->using_index
8929 ? !item
.per_cu
->v
.quick
->compunit_symtab
8930 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8931 /* Skip dummy CUs. */
8932 && item
.per_cu
->cu
!= NULL
)
8934 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8935 unsigned int debug_print_threshold
;
8938 if (per_cu
->is_debug_types
)
8940 struct signatured_type
*sig_type
=
8941 (struct signatured_type
*) per_cu
;
8943 sprintf (buf
, "TU %s at offset %s",
8944 hex_string (sig_type
->signature
),
8945 sect_offset_str (per_cu
->sect_off
));
8946 /* There can be 100s of TUs.
8947 Only print them in verbose mode. */
8948 debug_print_threshold
= 2;
8952 sprintf (buf
, "CU at offset %s",
8953 sect_offset_str (per_cu
->sect_off
));
8954 debug_print_threshold
= 1;
8957 if (dwarf_read_debug
>= debug_print_threshold
)
8958 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8960 if (per_cu
->is_debug_types
)
8961 process_full_type_unit (per_cu
, item
.pretend_language
);
8963 process_full_comp_unit (per_cu
, item
.pretend_language
);
8965 if (dwarf_read_debug
>= debug_print_threshold
)
8966 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8969 item
.per_cu
->queued
= 0;
8970 dwarf2_per_objfile
->queue
.pop ();
8973 if (dwarf_read_debug
)
8975 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8976 objfile_name (dwarf2_per_objfile
->objfile
));
8980 /* Read in full symbols for PST, and anything it depends on. */
8983 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8985 gdb_assert (!readin
);
8987 expand_dependencies (objfile
);
8989 dw2_do_instantiate_symtab (per_cu_data
, false);
8990 gdb_assert (get_compunit_symtab () != nullptr);
8993 /* Trivial hash function for die_info: the hash value of a DIE
8994 is its offset in .debug_info for this objfile. */
8997 die_hash (const void *item
)
8999 const struct die_info
*die
= (const struct die_info
*) item
;
9001 return to_underlying (die
->sect_off
);
9004 /* Trivial comparison function for die_info structures: two DIEs
9005 are equal if they have the same offset. */
9008 die_eq (const void *item_lhs
, const void *item_rhs
)
9010 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9011 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9013 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9016 /* Load the DIEs associated with PER_CU into memory. */
9019 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9021 enum language pretend_language
)
9023 gdb_assert (! this_cu
->is_debug_types
);
9025 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
9029 struct dwarf2_cu
*cu
= reader
.cu
;
9030 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9032 gdb_assert (cu
->die_hash
== NULL
);
9034 htab_create_alloc_ex (cu
->header
.length
/ 12,
9038 &cu
->comp_unit_obstack
,
9039 hashtab_obstack_allocate
,
9040 dummy_obstack_deallocate
);
9042 if (reader
.comp_unit_die
->has_children
)
9043 reader
.comp_unit_die
->child
9044 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9045 &info_ptr
, reader
.comp_unit_die
);
9046 cu
->dies
= reader
.comp_unit_die
;
9047 /* comp_unit_die is not stored in die_hash, no need. */
9049 /* We try not to read any attributes in this function, because not
9050 all CUs needed for references have been loaded yet, and symbol
9051 table processing isn't initialized. But we have to set the CU language,
9052 or we won't be able to build types correctly.
9053 Similarly, if we do not read the producer, we can not apply
9054 producer-specific interpretation. */
9055 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9060 /* Add a DIE to the delayed physname list. */
9063 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9064 const char *name
, struct die_info
*die
,
9065 struct dwarf2_cu
*cu
)
9067 struct delayed_method_info mi
;
9069 mi
.fnfield_index
= fnfield_index
;
9073 cu
->method_list
.push_back (mi
);
9076 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9077 "const" / "volatile". If so, decrements LEN by the length of the
9078 modifier and return true. Otherwise return false. */
9082 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9084 size_t mod_len
= sizeof (mod
) - 1;
9085 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9093 /* Compute the physnames of any methods on the CU's method list.
9095 The computation of method physnames is delayed in order to avoid the
9096 (bad) condition that one of the method's formal parameters is of an as yet
9100 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9102 /* Only C++ delays computing physnames. */
9103 if (cu
->method_list
.empty ())
9105 gdb_assert (cu
->language
== language_cplus
);
9107 for (const delayed_method_info
&mi
: cu
->method_list
)
9109 const char *physname
;
9110 struct fn_fieldlist
*fn_flp
9111 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9112 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9113 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9114 = physname
? physname
: "";
9116 /* Since there's no tag to indicate whether a method is a
9117 const/volatile overload, extract that information out of the
9119 if (physname
!= NULL
)
9121 size_t len
= strlen (physname
);
9125 if (physname
[len
] == ')') /* shortcut */
9127 else if (check_modifier (physname
, len
, " const"))
9128 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9129 else if (check_modifier (physname
, len
, " volatile"))
9130 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9137 /* The list is no longer needed. */
9138 cu
->method_list
.clear ();
9141 /* Go objects should be embedded in a DW_TAG_module DIE,
9142 and it's not clear if/how imported objects will appear.
9143 To keep Go support simple until that's worked out,
9144 go back through what we've read and create something usable.
9145 We could do this while processing each DIE, and feels kinda cleaner,
9146 but that way is more invasive.
9147 This is to, for example, allow the user to type "p var" or "b main"
9148 without having to specify the package name, and allow lookups
9149 of module.object to work in contexts that use the expression
9153 fixup_go_packaging (struct dwarf2_cu
*cu
)
9155 gdb::unique_xmalloc_ptr
<char> package_name
;
9156 struct pending
*list
;
9159 for (list
= *cu
->get_builder ()->get_global_symbols ();
9163 for (i
= 0; i
< list
->nsyms
; ++i
)
9165 struct symbol
*sym
= list
->symbol
[i
];
9167 if (sym
->language () == language_go
9168 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9170 gdb::unique_xmalloc_ptr
<char> this_package_name
9171 (go_symbol_package_name (sym
));
9173 if (this_package_name
== NULL
)
9175 if (package_name
== NULL
)
9176 package_name
= std::move (this_package_name
);
9179 struct objfile
*objfile
9180 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9181 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9182 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9183 (symbol_symtab (sym
) != NULL
9184 ? symtab_to_filename_for_display
9185 (symbol_symtab (sym
))
9186 : objfile_name (objfile
)),
9187 this_package_name
.get (), package_name
.get ());
9193 if (package_name
!= NULL
)
9195 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9196 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9197 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9198 saved_package_name
);
9201 sym
= new (&objfile
->objfile_obstack
) symbol
;
9202 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9203 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9204 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9205 e.g., "main" finds the "main" module and not C's main(). */
9206 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9207 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9208 SYMBOL_TYPE (sym
) = type
;
9210 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9214 /* Allocate a fully-qualified name consisting of the two parts on the
9218 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9220 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9223 /* A helper that allocates a variant part to attach to a Rust enum
9224 type. OBSTACK is where the results should be allocated. TYPE is
9225 the type we're processing. DISCRIMINANT_INDEX is the index of the
9226 discriminant. It must be the index of one of the fields of TYPE.
9227 DEFAULT_INDEX is the index of the default field; or -1 if there is
9228 no default. RANGES is indexed by "effective" field number (the
9229 field index, but omitting the discriminant and default fields) and
9230 must hold the discriminant values used by the variants. Note that
9231 RANGES must have a lifetime at least as long as OBSTACK -- either
9232 already allocated on it, or static. */
9235 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9236 int discriminant_index
, int default_index
,
9237 gdb::array_view
<discriminant_range
> ranges
)
9239 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9240 must be handled by the caller. */
9241 gdb_assert (discriminant_index
>= 0
9242 && discriminant_index
< type
->num_fields ());
9243 gdb_assert (default_index
== -1
9244 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9246 /* We have one variant for each non-discriminant field. */
9247 int n_variants
= type
->num_fields () - 1;
9249 variant
*variants
= new (obstack
) variant
[n_variants
];
9252 for (int i
= 0; i
< type
->num_fields (); ++i
)
9254 if (i
== discriminant_index
)
9257 variants
[var_idx
].first_field
= i
;
9258 variants
[var_idx
].last_field
= i
+ 1;
9260 /* The default field does not need a range, but other fields do.
9261 We skipped the discriminant above. */
9262 if (i
!= default_index
)
9264 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9271 gdb_assert (range_idx
== ranges
.size ());
9272 gdb_assert (var_idx
== n_variants
);
9274 variant_part
*part
= new (obstack
) variant_part
;
9275 part
->discriminant_index
= discriminant_index
;
9276 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9277 discriminant_index
));
9278 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9280 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9281 gdb::array_view
<variant_part
> *prop_value
9282 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9284 struct dynamic_prop prop
;
9285 prop
.kind
= PROP_VARIANT_PARTS
;
9286 prop
.data
.variant_parts
= prop_value
;
9288 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9291 /* Some versions of rustc emitted enums in an unusual way.
9293 Ordinary enums were emitted as unions. The first element of each
9294 structure in the union was named "RUST$ENUM$DISR". This element
9295 held the discriminant.
9297 These versions of Rust also implemented the "non-zero"
9298 optimization. When the enum had two values, and one is empty and
9299 the other holds a pointer that cannot be zero, the pointer is used
9300 as the discriminant, with a zero value meaning the empty variant.
9301 Here, the union's first member is of the form
9302 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9303 where the fieldnos are the indices of the fields that should be
9304 traversed in order to find the field (which may be several fields deep)
9305 and the variantname is the name of the variant of the case when the
9308 This function recognizes whether TYPE is of one of these forms,
9309 and, if so, smashes it to be a variant type. */
9312 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9314 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9316 /* We don't need to deal with empty enums. */
9317 if (type
->num_fields () == 0)
9320 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9321 if (type
->num_fields () == 1
9322 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9324 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9326 /* Decode the field name to find the offset of the
9328 ULONGEST bit_offset
= 0;
9329 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9330 while (name
[0] >= '0' && name
[0] <= '9')
9333 unsigned long index
= strtoul (name
, &tail
, 10);
9336 || index
>= field_type
->num_fields ()
9337 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9338 != FIELD_LOC_KIND_BITPOS
))
9340 complaint (_("Could not parse Rust enum encoding string \"%s\""
9342 TYPE_FIELD_NAME (type
, 0),
9343 objfile_name (objfile
));
9348 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9349 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9352 /* Smash this type to be a structure type. We have to do this
9353 because the type has already been recorded. */
9354 type
->set_code (TYPE_CODE_STRUCT
);
9355 type
->set_num_fields (3);
9356 /* Save the field we care about. */
9357 struct field saved_field
= type
->field (0);
9359 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9361 /* Put the discriminant at index 0. */
9362 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9363 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9364 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9365 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9367 /* The order of fields doesn't really matter, so put the real
9368 field at index 1 and the data-less field at index 2. */
9369 type
->field (1) = saved_field
;
9370 TYPE_FIELD_NAME (type
, 1)
9371 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, 1)->name ());
9372 TYPE_FIELD_TYPE (type
, 1)->set_name
9373 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9374 TYPE_FIELD_NAME (type
, 1)));
9376 const char *dataless_name
9377 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9379 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9381 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9382 /* NAME points into the original discriminant name, which
9383 already has the correct lifetime. */
9384 TYPE_FIELD_NAME (type
, 2) = name
;
9385 SET_FIELD_BITPOS (type
->field (2), 0);
9387 /* Indicate that this is a variant type. */
9388 static discriminant_range ranges
[1] = { { 0, 0 } };
9389 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9391 /* A union with a single anonymous field is probably an old-style
9393 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9395 /* Smash this type to be a structure type. We have to do this
9396 because the type has already been recorded. */
9397 type
->set_code (TYPE_CODE_STRUCT
);
9399 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9400 const char *variant_name
9401 = rust_last_path_segment (field_type
->name ());
9402 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9403 field_type
->set_name
9404 (rust_fully_qualify (&objfile
->objfile_obstack
,
9405 type
->name (), variant_name
));
9409 struct type
*disr_type
= nullptr;
9410 for (int i
= 0; i
< type
->num_fields (); ++i
)
9412 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9414 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9416 /* All fields of a true enum will be structs. */
9419 else if (disr_type
->num_fields () == 0)
9421 /* Could be data-less variant, so keep going. */
9422 disr_type
= nullptr;
9424 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9425 "RUST$ENUM$DISR") != 0)
9427 /* Not a Rust enum. */
9437 /* If we got here without a discriminant, then it's probably
9439 if (disr_type
== nullptr)
9442 /* Smash this type to be a structure type. We have to do this
9443 because the type has already been recorded. */
9444 type
->set_code (TYPE_CODE_STRUCT
);
9446 /* Make space for the discriminant field. */
9447 struct field
*disr_field
= &disr_type
->field (0);
9449 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9450 * sizeof (struct field
)));
9451 memcpy (new_fields
+ 1, type
->fields (),
9452 type
->num_fields () * sizeof (struct field
));
9453 type
->set_fields (new_fields
);
9454 type
->set_num_fields (type
->num_fields () + 1);
9456 /* Install the discriminant at index 0 in the union. */
9457 type
->field (0) = *disr_field
;
9458 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9459 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9461 /* We need a way to find the correct discriminant given a
9462 variant name. For convenience we build a map here. */
9463 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9464 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9465 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9467 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9470 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9471 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9475 int n_fields
= type
->num_fields ();
9476 /* We don't need a range entry for the discriminant, but we do
9477 need one for every other field, as there is no default
9479 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9482 /* Skip the discriminant here. */
9483 for (int i
= 1; i
< n_fields
; ++i
)
9485 /* Find the final word in the name of this variant's type.
9486 That name can be used to look up the correct
9488 const char *variant_name
9489 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, i
)->name ());
9491 auto iter
= discriminant_map
.find (variant_name
);
9492 if (iter
!= discriminant_map
.end ())
9494 ranges
[i
].low
= iter
->second
;
9495 ranges
[i
].high
= iter
->second
;
9498 /* Remove the discriminant field, if it exists. */
9499 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9500 if (sub_type
->num_fields () > 0)
9502 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9503 sub_type
->set_fields (sub_type
->fields () + 1);
9505 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9507 (rust_fully_qualify (&objfile
->objfile_obstack
,
9508 type
->name (), variant_name
));
9511 /* Indicate that this is a variant type. */
9512 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9513 gdb::array_view
<discriminant_range
> (ranges
,
9518 /* Rewrite some Rust unions to be structures with variants parts. */
9521 rust_union_quirks (struct dwarf2_cu
*cu
)
9523 gdb_assert (cu
->language
== language_rust
);
9524 for (type
*type_
: cu
->rust_unions
)
9525 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9526 /* We don't need this any more. */
9527 cu
->rust_unions
.clear ();
9530 /* Return the symtab for PER_CU. This works properly regardless of
9531 whether we're using the index or psymtabs. */
9533 static struct compunit_symtab
*
9534 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9536 return (per_cu
->dwarf2_per_objfile
->using_index
9537 ? per_cu
->v
.quick
->compunit_symtab
9538 : per_cu
->v
.psymtab
->compunit_symtab
);
9541 /* A helper function for computing the list of all symbol tables
9542 included by PER_CU. */
9545 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9546 htab_t all_children
, htab_t all_type_symtabs
,
9547 struct dwarf2_per_cu_data
*per_cu
,
9548 struct compunit_symtab
*immediate_parent
)
9551 struct compunit_symtab
*cust
;
9553 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9556 /* This inclusion and its children have been processed. */
9561 /* Only add a CU if it has a symbol table. */
9562 cust
= get_compunit_symtab (per_cu
);
9565 /* If this is a type unit only add its symbol table if we haven't
9566 seen it yet (type unit per_cu's can share symtabs). */
9567 if (per_cu
->is_debug_types
)
9569 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9573 result
->push_back (cust
);
9574 if (cust
->user
== NULL
)
9575 cust
->user
= immediate_parent
;
9580 result
->push_back (cust
);
9581 if (cust
->user
== NULL
)
9582 cust
->user
= immediate_parent
;
9586 if (!per_cu
->imported_symtabs_empty ())
9587 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9589 recursively_compute_inclusions (result
, all_children
,
9590 all_type_symtabs
, ptr
, cust
);
9594 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9598 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9600 gdb_assert (! per_cu
->is_debug_types
);
9602 if (!per_cu
->imported_symtabs_empty ())
9605 std::vector
<compunit_symtab
*> result_symtabs
;
9606 htab_t all_children
, all_type_symtabs
;
9607 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9609 /* If we don't have a symtab, we can just skip this case. */
9613 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9614 NULL
, xcalloc
, xfree
);
9615 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9616 NULL
, xcalloc
, xfree
);
9618 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9620 recursively_compute_inclusions (&result_symtabs
, all_children
,
9621 all_type_symtabs
, ptr
, cust
);
9624 /* Now we have a transitive closure of all the included symtabs. */
9625 len
= result_symtabs
.size ();
9627 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9628 struct compunit_symtab
*, len
+ 1);
9629 memcpy (cust
->includes
, result_symtabs
.data (),
9630 len
* sizeof (compunit_symtab
*));
9631 cust
->includes
[len
] = NULL
;
9633 htab_delete (all_children
);
9634 htab_delete (all_type_symtabs
);
9638 /* Compute the 'includes' field for the symtabs of all the CUs we just
9642 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9644 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9646 if (! iter
->is_debug_types
)
9647 compute_compunit_symtab_includes (iter
);
9650 dwarf2_per_objfile
->just_read_cus
.clear ();
9653 /* Generate full symbol information for PER_CU, whose DIEs have
9654 already been loaded into memory. */
9657 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9658 enum language pretend_language
)
9660 struct dwarf2_cu
*cu
= per_cu
->cu
;
9661 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9662 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9663 struct gdbarch
*gdbarch
= objfile
->arch ();
9664 CORE_ADDR lowpc
, highpc
;
9665 struct compunit_symtab
*cust
;
9667 struct block
*static_block
;
9670 baseaddr
= objfile
->text_section_offset ();
9672 /* Clear the list here in case something was left over. */
9673 cu
->method_list
.clear ();
9675 cu
->language
= pretend_language
;
9676 cu
->language_defn
= language_def (cu
->language
);
9678 /* Do line number decoding in read_file_scope () */
9679 process_die (cu
->dies
, cu
);
9681 /* For now fudge the Go package. */
9682 if (cu
->language
== language_go
)
9683 fixup_go_packaging (cu
);
9685 /* Now that we have processed all the DIEs in the CU, all the types
9686 should be complete, and it should now be safe to compute all of the
9688 compute_delayed_physnames (cu
);
9690 if (cu
->language
== language_rust
)
9691 rust_union_quirks (cu
);
9693 /* Some compilers don't define a DW_AT_high_pc attribute for the
9694 compilation unit. If the DW_AT_high_pc is missing, synthesize
9695 it, by scanning the DIE's below the compilation unit. */
9696 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9698 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9699 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9701 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9702 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9703 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9704 addrmap to help ensure it has an accurate map of pc values belonging to
9706 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9708 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9709 SECT_OFF_TEXT (objfile
),
9714 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9716 /* Set symtab language to language from DW_AT_language. If the
9717 compilation is from a C file generated by language preprocessors, do
9718 not set the language if it was already deduced by start_subfile. */
9719 if (!(cu
->language
== language_c
9720 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9721 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9723 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9724 produce DW_AT_location with location lists but it can be possibly
9725 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9726 there were bugs in prologue debug info, fixed later in GCC-4.5
9727 by "unwind info for epilogues" patch (which is not directly related).
9729 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9730 needed, it would be wrong due to missing DW_AT_producer there.
9732 Still one can confuse GDB by using non-standard GCC compilation
9733 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9735 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9736 cust
->locations_valid
= 1;
9738 if (gcc_4_minor
>= 5)
9739 cust
->epilogue_unwind_valid
= 1;
9741 cust
->call_site_htab
= cu
->call_site_htab
;
9744 if (dwarf2_per_objfile
->using_index
)
9745 per_cu
->v
.quick
->compunit_symtab
= cust
;
9748 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9749 pst
->compunit_symtab
= cust
;
9753 /* Push it for inclusion processing later. */
9754 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
9756 /* Not needed any more. */
9757 cu
->reset_builder ();
9760 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9761 already been loaded into memory. */
9764 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9765 enum language pretend_language
)
9767 struct dwarf2_cu
*cu
= per_cu
->cu
;
9768 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9769 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9770 struct compunit_symtab
*cust
;
9771 struct signatured_type
*sig_type
;
9773 gdb_assert (per_cu
->is_debug_types
);
9774 sig_type
= (struct signatured_type
*) per_cu
;
9776 /* Clear the list here in case something was left over. */
9777 cu
->method_list
.clear ();
9779 cu
->language
= pretend_language
;
9780 cu
->language_defn
= language_def (cu
->language
);
9782 /* The symbol tables are set up in read_type_unit_scope. */
9783 process_die (cu
->dies
, cu
);
9785 /* For now fudge the Go package. */
9786 if (cu
->language
== language_go
)
9787 fixup_go_packaging (cu
);
9789 /* Now that we have processed all the DIEs in the CU, all the types
9790 should be complete, and it should now be safe to compute all of the
9792 compute_delayed_physnames (cu
);
9794 if (cu
->language
== language_rust
)
9795 rust_union_quirks (cu
);
9797 /* TUs share symbol tables.
9798 If this is the first TU to use this symtab, complete the construction
9799 of it with end_expandable_symtab. Otherwise, complete the addition of
9800 this TU's symbols to the existing symtab. */
9801 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9803 buildsym_compunit
*builder
= cu
->get_builder ();
9804 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9805 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9809 /* Set symtab language to language from DW_AT_language. If the
9810 compilation is from a C file generated by language preprocessors,
9811 do not set the language if it was already deduced by
9813 if (!(cu
->language
== language_c
9814 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9815 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9820 cu
->get_builder ()->augment_type_symtab ();
9821 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9824 if (dwarf2_per_objfile
->using_index
)
9825 per_cu
->v
.quick
->compunit_symtab
= cust
;
9828 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9829 pst
->compunit_symtab
= cust
;
9833 /* Not needed any more. */
9834 cu
->reset_builder ();
9837 /* Process an imported unit DIE. */
9840 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9842 struct attribute
*attr
;
9844 /* For now we don't handle imported units in type units. */
9845 if (cu
->per_cu
->is_debug_types
)
9847 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9848 " supported in type units [in module %s]"),
9849 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9852 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9855 sect_offset sect_off
= attr
->get_ref_die_offset ();
9856 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9857 dwarf2_per_cu_data
*per_cu
9858 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9859 cu
->per_cu
->dwarf2_per_objfile
);
9861 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9862 into another compilation unit, at root level. Regard this as a hint,
9864 if (die
->parent
&& die
->parent
->parent
== NULL
9865 && per_cu
->unit_type
== DW_UT_compile
9866 && per_cu
->lang
== language_cplus
)
9869 /* If necessary, add it to the queue and load its DIEs. */
9870 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9871 load_full_comp_unit (per_cu
, false, cu
->language
);
9873 cu
->per_cu
->imported_symtabs_push (per_cu
);
9877 /* RAII object that represents a process_die scope: i.e.,
9878 starts/finishes processing a DIE. */
9879 class process_die_scope
9882 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9883 : m_die (die
), m_cu (cu
)
9885 /* We should only be processing DIEs not already in process. */
9886 gdb_assert (!m_die
->in_process
);
9887 m_die
->in_process
= true;
9890 ~process_die_scope ()
9892 m_die
->in_process
= false;
9894 /* If we're done processing the DIE for the CU that owns the line
9895 header, we don't need the line header anymore. */
9896 if (m_cu
->line_header_die_owner
== m_die
)
9898 delete m_cu
->line_header
;
9899 m_cu
->line_header
= NULL
;
9900 m_cu
->line_header_die_owner
= NULL
;
9909 /* Process a die and its children. */
9912 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9914 process_die_scope
scope (die
, cu
);
9918 case DW_TAG_padding
:
9920 case DW_TAG_compile_unit
:
9921 case DW_TAG_partial_unit
:
9922 read_file_scope (die
, cu
);
9924 case DW_TAG_type_unit
:
9925 read_type_unit_scope (die
, cu
);
9927 case DW_TAG_subprogram
:
9928 /* Nested subprograms in Fortran get a prefix. */
9929 if (cu
->language
== language_fortran
9930 && die
->parent
!= NULL
9931 && die
->parent
->tag
== DW_TAG_subprogram
)
9932 cu
->processing_has_namespace_info
= true;
9934 case DW_TAG_inlined_subroutine
:
9935 read_func_scope (die
, cu
);
9937 case DW_TAG_lexical_block
:
9938 case DW_TAG_try_block
:
9939 case DW_TAG_catch_block
:
9940 read_lexical_block_scope (die
, cu
);
9942 case DW_TAG_call_site
:
9943 case DW_TAG_GNU_call_site
:
9944 read_call_site_scope (die
, cu
);
9946 case DW_TAG_class_type
:
9947 case DW_TAG_interface_type
:
9948 case DW_TAG_structure_type
:
9949 case DW_TAG_union_type
:
9950 process_structure_scope (die
, cu
);
9952 case DW_TAG_enumeration_type
:
9953 process_enumeration_scope (die
, cu
);
9956 /* These dies have a type, but processing them does not create
9957 a symbol or recurse to process the children. Therefore we can
9958 read them on-demand through read_type_die. */
9959 case DW_TAG_subroutine_type
:
9960 case DW_TAG_set_type
:
9961 case DW_TAG_array_type
:
9962 case DW_TAG_pointer_type
:
9963 case DW_TAG_ptr_to_member_type
:
9964 case DW_TAG_reference_type
:
9965 case DW_TAG_rvalue_reference_type
:
9966 case DW_TAG_string_type
:
9969 case DW_TAG_base_type
:
9970 case DW_TAG_subrange_type
:
9971 case DW_TAG_typedef
:
9972 /* Add a typedef symbol for the type definition, if it has a
9974 new_symbol (die
, read_type_die (die
, cu
), cu
);
9976 case DW_TAG_common_block
:
9977 read_common_block (die
, cu
);
9979 case DW_TAG_common_inclusion
:
9981 case DW_TAG_namespace
:
9982 cu
->processing_has_namespace_info
= true;
9983 read_namespace (die
, cu
);
9986 cu
->processing_has_namespace_info
= true;
9987 read_module (die
, cu
);
9989 case DW_TAG_imported_declaration
:
9990 cu
->processing_has_namespace_info
= true;
9991 if (read_namespace_alias (die
, cu
))
9993 /* The declaration is not a global namespace alias. */
9995 case DW_TAG_imported_module
:
9996 cu
->processing_has_namespace_info
= true;
9997 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9998 || cu
->language
!= language_fortran
))
9999 complaint (_("Tag '%s' has unexpected children"),
10000 dwarf_tag_name (die
->tag
));
10001 read_import_statement (die
, cu
);
10004 case DW_TAG_imported_unit
:
10005 process_imported_unit_die (die
, cu
);
10008 case DW_TAG_variable
:
10009 read_variable (die
, cu
);
10013 new_symbol (die
, NULL
, cu
);
10018 /* DWARF name computation. */
10020 /* A helper function for dwarf2_compute_name which determines whether DIE
10021 needs to have the name of the scope prepended to the name listed in the
10025 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10027 struct attribute
*attr
;
10031 case DW_TAG_namespace
:
10032 case DW_TAG_typedef
:
10033 case DW_TAG_class_type
:
10034 case DW_TAG_interface_type
:
10035 case DW_TAG_structure_type
:
10036 case DW_TAG_union_type
:
10037 case DW_TAG_enumeration_type
:
10038 case DW_TAG_enumerator
:
10039 case DW_TAG_subprogram
:
10040 case DW_TAG_inlined_subroutine
:
10041 case DW_TAG_member
:
10042 case DW_TAG_imported_declaration
:
10045 case DW_TAG_variable
:
10046 case DW_TAG_constant
:
10047 /* We only need to prefix "globally" visible variables. These include
10048 any variable marked with DW_AT_external or any variable that
10049 lives in a namespace. [Variables in anonymous namespaces
10050 require prefixing, but they are not DW_AT_external.] */
10052 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10054 struct dwarf2_cu
*spec_cu
= cu
;
10056 return die_needs_namespace (die_specification (die
, &spec_cu
),
10060 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10061 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10062 && die
->parent
->tag
!= DW_TAG_module
)
10064 /* A variable in a lexical block of some kind does not need a
10065 namespace, even though in C++ such variables may be external
10066 and have a mangled name. */
10067 if (die
->parent
->tag
== DW_TAG_lexical_block
10068 || die
->parent
->tag
== DW_TAG_try_block
10069 || die
->parent
->tag
== DW_TAG_catch_block
10070 || die
->parent
->tag
== DW_TAG_subprogram
)
10079 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10080 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10081 defined for the given DIE. */
10083 static struct attribute
*
10084 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10086 struct attribute
*attr
;
10088 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10090 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10095 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10096 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10097 defined for the given DIE. */
10099 static const char *
10100 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10102 const char *linkage_name
;
10104 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10105 if (linkage_name
== NULL
)
10106 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10108 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10109 See https://github.com/rust-lang/rust/issues/32925. */
10110 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10111 && strchr (linkage_name
, '{') != NULL
)
10112 linkage_name
= NULL
;
10114 return linkage_name
;
10117 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10118 compute the physname for the object, which include a method's:
10119 - formal parameters (C++),
10120 - receiver type (Go),
10122 The term "physname" is a bit confusing.
10123 For C++, for example, it is the demangled name.
10124 For Go, for example, it's the mangled name.
10126 For Ada, return the DIE's linkage name rather than the fully qualified
10127 name. PHYSNAME is ignored..
10129 The result is allocated on the dwarf2_per_objfile obstack and
10132 static const char *
10133 dwarf2_compute_name (const char *name
,
10134 struct die_info
*die
, struct dwarf2_cu
*cu
,
10137 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10140 name
= dwarf2_name (die
, cu
);
10142 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10143 but otherwise compute it by typename_concat inside GDB.
10144 FIXME: Actually this is not really true, or at least not always true.
10145 It's all very confusing. compute_and_set_names doesn't try to demangle
10146 Fortran names because there is no mangling standard. So new_symbol
10147 will set the demangled name to the result of dwarf2_full_name, and it is
10148 the demangled name that GDB uses if it exists. */
10149 if (cu
->language
== language_ada
10150 || (cu
->language
== language_fortran
&& physname
))
10152 /* For Ada unit, we prefer the linkage name over the name, as
10153 the former contains the exported name, which the user expects
10154 to be able to reference. Ideally, we want the user to be able
10155 to reference this entity using either natural or linkage name,
10156 but we haven't started looking at this enhancement yet. */
10157 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10159 if (linkage_name
!= NULL
)
10160 return linkage_name
;
10163 /* These are the only languages we know how to qualify names in. */
10165 && (cu
->language
== language_cplus
10166 || cu
->language
== language_fortran
|| cu
->language
== language_d
10167 || cu
->language
== language_rust
))
10169 if (die_needs_namespace (die
, cu
))
10171 const char *prefix
;
10172 const char *canonical_name
= NULL
;
10176 prefix
= determine_prefix (die
, cu
);
10177 if (*prefix
!= '\0')
10179 gdb::unique_xmalloc_ptr
<char> prefixed_name
10180 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10182 buf
.puts (prefixed_name
.get ());
10187 /* Template parameters may be specified in the DIE's DW_AT_name, or
10188 as children with DW_TAG_template_type_param or
10189 DW_TAG_value_type_param. If the latter, add them to the name
10190 here. If the name already has template parameters, then
10191 skip this step; some versions of GCC emit both, and
10192 it is more efficient to use the pre-computed name.
10194 Something to keep in mind about this process: it is very
10195 unlikely, or in some cases downright impossible, to produce
10196 something that will match the mangled name of a function.
10197 If the definition of the function has the same debug info,
10198 we should be able to match up with it anyway. But fallbacks
10199 using the minimal symbol, for instance to find a method
10200 implemented in a stripped copy of libstdc++, will not work.
10201 If we do not have debug info for the definition, we will have to
10202 match them up some other way.
10204 When we do name matching there is a related problem with function
10205 templates; two instantiated function templates are allowed to
10206 differ only by their return types, which we do not add here. */
10208 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10210 struct attribute
*attr
;
10211 struct die_info
*child
;
10214 die
->building_fullname
= 1;
10216 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10220 const gdb_byte
*bytes
;
10221 struct dwarf2_locexpr_baton
*baton
;
10224 if (child
->tag
!= DW_TAG_template_type_param
10225 && child
->tag
!= DW_TAG_template_value_param
)
10236 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10239 complaint (_("template parameter missing DW_AT_type"));
10240 buf
.puts ("UNKNOWN_TYPE");
10243 type
= die_type (child
, cu
);
10245 if (child
->tag
== DW_TAG_template_type_param
)
10247 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10248 &type_print_raw_options
);
10252 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10255 complaint (_("template parameter missing "
10256 "DW_AT_const_value"));
10257 buf
.puts ("UNKNOWN_VALUE");
10261 dwarf2_const_value_attr (attr
, type
, name
,
10262 &cu
->comp_unit_obstack
, cu
,
10263 &value
, &bytes
, &baton
);
10265 if (TYPE_NOSIGN (type
))
10266 /* GDB prints characters as NUMBER 'CHAR'. If that's
10267 changed, this can use value_print instead. */
10268 c_printchar (value
, type
, &buf
);
10271 struct value_print_options opts
;
10274 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10278 else if (bytes
!= NULL
)
10280 v
= allocate_value (type
);
10281 memcpy (value_contents_writeable (v
), bytes
,
10282 TYPE_LENGTH (type
));
10285 v
= value_from_longest (type
, value
);
10287 /* Specify decimal so that we do not depend on
10289 get_formatted_print_options (&opts
, 'd');
10291 value_print (v
, &buf
, &opts
);
10296 die
->building_fullname
= 0;
10300 /* Close the argument list, with a space if necessary
10301 (nested templates). */
10302 if (!buf
.empty () && buf
.string ().back () == '>')
10309 /* For C++ methods, append formal parameter type
10310 information, if PHYSNAME. */
10312 if (physname
&& die
->tag
== DW_TAG_subprogram
10313 && cu
->language
== language_cplus
)
10315 struct type
*type
= read_type_die (die
, cu
);
10317 c_type_print_args (type
, &buf
, 1, cu
->language
,
10318 &type_print_raw_options
);
10320 if (cu
->language
== language_cplus
)
10322 /* Assume that an artificial first parameter is
10323 "this", but do not crash if it is not. RealView
10324 marks unnamed (and thus unused) parameters as
10325 artificial; there is no way to differentiate
10327 if (type
->num_fields () > 0
10328 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10329 && TYPE_FIELD_TYPE (type
, 0)->code () == TYPE_CODE_PTR
10330 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10332 buf
.puts (" const");
10336 const std::string
&intermediate_name
= buf
.string ();
10338 if (cu
->language
== language_cplus
)
10340 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10343 /* If we only computed INTERMEDIATE_NAME, or if
10344 INTERMEDIATE_NAME is already canonical, then we need to
10346 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10347 name
= objfile
->intern (intermediate_name
);
10349 name
= canonical_name
;
10356 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10357 If scope qualifiers are appropriate they will be added. The result
10358 will be allocated on the storage_obstack, or NULL if the DIE does
10359 not have a name. NAME may either be from a previous call to
10360 dwarf2_name or NULL.
10362 The output string will be canonicalized (if C++). */
10364 static const char *
10365 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10367 return dwarf2_compute_name (name
, die
, cu
, 0);
10370 /* Construct a physname for the given DIE in CU. NAME may either be
10371 from a previous call to dwarf2_name or NULL. The result will be
10372 allocated on the objfile_objstack or NULL if the DIE does not have a
10375 The output string will be canonicalized (if C++). */
10377 static const char *
10378 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10380 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10381 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10384 /* In this case dwarf2_compute_name is just a shortcut not building anything
10386 if (!die_needs_namespace (die
, cu
))
10387 return dwarf2_compute_name (name
, die
, cu
, 1);
10389 if (cu
->language
!= language_rust
)
10390 mangled
= dw2_linkage_name (die
, cu
);
10392 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10394 gdb::unique_xmalloc_ptr
<char> demangled
;
10395 if (mangled
!= NULL
)
10398 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10400 /* Do nothing (do not demangle the symbol name). */
10402 else if (cu
->language
== language_go
)
10404 /* This is a lie, but we already lie to the caller new_symbol.
10405 new_symbol assumes we return the mangled name.
10406 This just undoes that lie until things are cleaned up. */
10410 /* Use DMGL_RET_DROP for C++ template functions to suppress
10411 their return type. It is easier for GDB users to search
10412 for such functions as `name(params)' than `long name(params)'.
10413 In such case the minimal symbol names do not match the full
10414 symbol names but for template functions there is never a need
10415 to look up their definition from their declaration so
10416 the only disadvantage remains the minimal symbol variant
10417 `long name(params)' does not have the proper inferior type. */
10418 demangled
.reset (gdb_demangle (mangled
,
10419 (DMGL_PARAMS
| DMGL_ANSI
10420 | DMGL_RET_DROP
)));
10423 canon
= demangled
.get ();
10431 if (canon
== NULL
|| check_physname
)
10433 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10435 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10437 /* It may not mean a bug in GDB. The compiler could also
10438 compute DW_AT_linkage_name incorrectly. But in such case
10439 GDB would need to be bug-to-bug compatible. */
10441 complaint (_("Computed physname <%s> does not match demangled <%s> "
10442 "(from linkage <%s>) - DIE at %s [in module %s]"),
10443 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10444 objfile_name (objfile
));
10446 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10447 is available here - over computed PHYSNAME. It is safer
10448 against both buggy GDB and buggy compilers. */
10462 retval
= objfile
->intern (retval
);
10467 /* Inspect DIE in CU for a namespace alias. If one exists, record
10468 a new symbol for it.
10470 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10473 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10475 struct attribute
*attr
;
10477 /* If the die does not have a name, this is not a namespace
10479 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10483 struct die_info
*d
= die
;
10484 struct dwarf2_cu
*imported_cu
= cu
;
10486 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10487 keep inspecting DIEs until we hit the underlying import. */
10488 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10489 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10491 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10495 d
= follow_die_ref (d
, attr
, &imported_cu
);
10496 if (d
->tag
!= DW_TAG_imported_declaration
)
10500 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10502 complaint (_("DIE at %s has too many recursively imported "
10503 "declarations"), sect_offset_str (d
->sect_off
));
10510 sect_offset sect_off
= attr
->get_ref_die_offset ();
10512 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10513 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10515 /* This declaration is a global namespace alias. Add
10516 a symbol for it whose type is the aliased namespace. */
10517 new_symbol (die
, type
, cu
);
10526 /* Return the using directives repository (global or local?) to use in the
10527 current context for CU.
10529 For Ada, imported declarations can materialize renamings, which *may* be
10530 global. However it is impossible (for now?) in DWARF to distinguish
10531 "external" imported declarations and "static" ones. As all imported
10532 declarations seem to be static in all other languages, make them all CU-wide
10533 global only in Ada. */
10535 static struct using_direct
**
10536 using_directives (struct dwarf2_cu
*cu
)
10538 if (cu
->language
== language_ada
10539 && cu
->get_builder ()->outermost_context_p ())
10540 return cu
->get_builder ()->get_global_using_directives ();
10542 return cu
->get_builder ()->get_local_using_directives ();
10545 /* Read the import statement specified by the given die and record it. */
10548 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10550 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10551 struct attribute
*import_attr
;
10552 struct die_info
*imported_die
, *child_die
;
10553 struct dwarf2_cu
*imported_cu
;
10554 const char *imported_name
;
10555 const char *imported_name_prefix
;
10556 const char *canonical_name
;
10557 const char *import_alias
;
10558 const char *imported_declaration
= NULL
;
10559 const char *import_prefix
;
10560 std::vector
<const char *> excludes
;
10562 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10563 if (import_attr
== NULL
)
10565 complaint (_("Tag '%s' has no DW_AT_import"),
10566 dwarf_tag_name (die
->tag
));
10571 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10572 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10573 if (imported_name
== NULL
)
10575 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10577 The import in the following code:
10591 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10592 <52> DW_AT_decl_file : 1
10593 <53> DW_AT_decl_line : 6
10594 <54> DW_AT_import : <0x75>
10595 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10596 <59> DW_AT_name : B
10597 <5b> DW_AT_decl_file : 1
10598 <5c> DW_AT_decl_line : 2
10599 <5d> DW_AT_type : <0x6e>
10601 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10602 <76> DW_AT_byte_size : 4
10603 <77> DW_AT_encoding : 5 (signed)
10605 imports the wrong die ( 0x75 instead of 0x58 ).
10606 This case will be ignored until the gcc bug is fixed. */
10610 /* Figure out the local name after import. */
10611 import_alias
= dwarf2_name (die
, cu
);
10613 /* Figure out where the statement is being imported to. */
10614 import_prefix
= determine_prefix (die
, cu
);
10616 /* Figure out what the scope of the imported die is and prepend it
10617 to the name of the imported die. */
10618 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10620 if (imported_die
->tag
!= DW_TAG_namespace
10621 && imported_die
->tag
!= DW_TAG_module
)
10623 imported_declaration
= imported_name
;
10624 canonical_name
= imported_name_prefix
;
10626 else if (strlen (imported_name_prefix
) > 0)
10627 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10628 imported_name_prefix
,
10629 (cu
->language
== language_d
? "." : "::"),
10630 imported_name
, (char *) NULL
);
10632 canonical_name
= imported_name
;
10634 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10635 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10636 child_die
= child_die
->sibling
)
10638 /* DWARF-4: A Fortran use statement with a “rename list” may be
10639 represented by an imported module entry with an import attribute
10640 referring to the module and owned entries corresponding to those
10641 entities that are renamed as part of being imported. */
10643 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10645 complaint (_("child DW_TAG_imported_declaration expected "
10646 "- DIE at %s [in module %s]"),
10647 sect_offset_str (child_die
->sect_off
),
10648 objfile_name (objfile
));
10652 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10653 if (import_attr
== NULL
)
10655 complaint (_("Tag '%s' has no DW_AT_import"),
10656 dwarf_tag_name (child_die
->tag
));
10661 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10663 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10664 if (imported_name
== NULL
)
10666 complaint (_("child DW_TAG_imported_declaration has unknown "
10667 "imported name - DIE at %s [in module %s]"),
10668 sect_offset_str (child_die
->sect_off
),
10669 objfile_name (objfile
));
10673 excludes
.push_back (imported_name
);
10675 process_die (child_die
, cu
);
10678 add_using_directive (using_directives (cu
),
10682 imported_declaration
,
10685 &objfile
->objfile_obstack
);
10688 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10689 types, but gives them a size of zero. Starting with version 14,
10690 ICC is compatible with GCC. */
10693 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10695 if (!cu
->checked_producer
)
10696 check_producer (cu
);
10698 return cu
->producer_is_icc_lt_14
;
10701 /* ICC generates a DW_AT_type for C void functions. This was observed on
10702 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10703 which says that void functions should not have a DW_AT_type. */
10706 producer_is_icc (struct dwarf2_cu
*cu
)
10708 if (!cu
->checked_producer
)
10709 check_producer (cu
);
10711 return cu
->producer_is_icc
;
10714 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10715 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10716 this, it was first present in GCC release 4.3.0. */
10719 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10721 if (!cu
->checked_producer
)
10722 check_producer (cu
);
10724 return cu
->producer_is_gcc_lt_4_3
;
10727 static file_and_directory
10728 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10730 file_and_directory res
;
10732 /* Find the filename. Do not use dwarf2_name here, since the filename
10733 is not a source language identifier. */
10734 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10735 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10737 if (res
.comp_dir
== NULL
10738 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10739 && IS_ABSOLUTE_PATH (res
.name
))
10741 res
.comp_dir_storage
= ldirname (res
.name
);
10742 if (!res
.comp_dir_storage
.empty ())
10743 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10745 if (res
.comp_dir
!= NULL
)
10747 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10748 directory, get rid of it. */
10749 const char *cp
= strchr (res
.comp_dir
, ':');
10751 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10752 res
.comp_dir
= cp
+ 1;
10755 if (res
.name
== NULL
)
10756 res
.name
= "<unknown>";
10761 /* Handle DW_AT_stmt_list for a compilation unit.
10762 DIE is the DW_TAG_compile_unit die for CU.
10763 COMP_DIR is the compilation directory. LOWPC is passed to
10764 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10767 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10768 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10770 struct dwarf2_per_objfile
*dwarf2_per_objfile
10771 = cu
->per_cu
->dwarf2_per_objfile
;
10772 struct attribute
*attr
;
10773 struct line_header line_header_local
;
10774 hashval_t line_header_local_hash
;
10776 int decode_mapping
;
10778 gdb_assert (! cu
->per_cu
->is_debug_types
);
10780 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10784 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10786 /* The line header hash table is only created if needed (it exists to
10787 prevent redundant reading of the line table for partial_units).
10788 If we're given a partial_unit, we'll need it. If we're given a
10789 compile_unit, then use the line header hash table if it's already
10790 created, but don't create one just yet. */
10792 if (dwarf2_per_objfile
->line_header_hash
== NULL
10793 && die
->tag
== DW_TAG_partial_unit
)
10795 dwarf2_per_objfile
->line_header_hash
10796 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10797 line_header_eq_voidp
,
10798 free_line_header_voidp
,
10802 line_header_local
.sect_off
= line_offset
;
10803 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10804 line_header_local_hash
= line_header_hash (&line_header_local
);
10805 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10807 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10808 &line_header_local
,
10809 line_header_local_hash
, NO_INSERT
);
10811 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10812 is not present in *SLOT (since if there is something in *SLOT then
10813 it will be for a partial_unit). */
10814 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10816 gdb_assert (*slot
!= NULL
);
10817 cu
->line_header
= (struct line_header
*) *slot
;
10822 /* dwarf_decode_line_header does not yet provide sufficient information.
10823 We always have to call also dwarf_decode_lines for it. */
10824 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10828 cu
->line_header
= lh
.release ();
10829 cu
->line_header_die_owner
= die
;
10831 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10835 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10836 &line_header_local
,
10837 line_header_local_hash
, INSERT
);
10838 gdb_assert (slot
!= NULL
);
10840 if (slot
!= NULL
&& *slot
== NULL
)
10842 /* This newly decoded line number information unit will be owned
10843 by line_header_hash hash table. */
10844 *slot
= cu
->line_header
;
10845 cu
->line_header_die_owner
= NULL
;
10849 /* We cannot free any current entry in (*slot) as that struct line_header
10850 may be already used by multiple CUs. Create only temporary decoded
10851 line_header for this CU - it may happen at most once for each line
10852 number information unit. And if we're not using line_header_hash
10853 then this is what we want as well. */
10854 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10856 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10857 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10862 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10865 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10867 struct dwarf2_per_objfile
*dwarf2_per_objfile
10868 = cu
->per_cu
->dwarf2_per_objfile
;
10869 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10870 struct gdbarch
*gdbarch
= objfile
->arch ();
10871 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10872 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10873 struct attribute
*attr
;
10874 struct die_info
*child_die
;
10875 CORE_ADDR baseaddr
;
10877 prepare_one_comp_unit (cu
, die
, cu
->language
);
10878 baseaddr
= objfile
->text_section_offset ();
10880 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10882 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10883 from finish_block. */
10884 if (lowpc
== ((CORE_ADDR
) -1))
10886 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10888 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10890 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10891 standardised yet. As a workaround for the language detection we fall
10892 back to the DW_AT_producer string. */
10893 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10894 cu
->language
= language_opencl
;
10896 /* Similar hack for Go. */
10897 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10898 set_cu_language (DW_LANG_Go
, cu
);
10900 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10902 /* Decode line number information if present. We do this before
10903 processing child DIEs, so that the line header table is available
10904 for DW_AT_decl_file. */
10905 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10907 /* Process all dies in compilation unit. */
10908 if (die
->child
!= NULL
)
10910 child_die
= die
->child
;
10911 while (child_die
&& child_die
->tag
)
10913 process_die (child_die
, cu
);
10914 child_die
= child_die
->sibling
;
10918 /* Decode macro information, if present. Dwarf 2 macro information
10919 refers to information in the line number info statement program
10920 header, so we can only read it if we've read the header
10922 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10924 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10925 if (attr
&& cu
->line_header
)
10927 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10928 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10930 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10934 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10935 if (attr
&& cu
->line_header
)
10937 unsigned int macro_offset
= DW_UNSND (attr
);
10939 dwarf_decode_macros (cu
, macro_offset
, 0);
10945 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10947 struct type_unit_group
*tu_group
;
10949 struct attribute
*attr
;
10951 struct signatured_type
*sig_type
;
10953 gdb_assert (per_cu
->is_debug_types
);
10954 sig_type
= (struct signatured_type
*) per_cu
;
10956 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10958 /* If we're using .gdb_index (includes -readnow) then
10959 per_cu->type_unit_group may not have been set up yet. */
10960 if (sig_type
->type_unit_group
== NULL
)
10961 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10962 tu_group
= sig_type
->type_unit_group
;
10964 /* If we've already processed this stmt_list there's no real need to
10965 do it again, we could fake it and just recreate the part we need
10966 (file name,index -> symtab mapping). If data shows this optimization
10967 is useful we can do it then. */
10968 first_time
= tu_group
->compunit_symtab
== NULL
;
10970 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10975 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10976 lh
= dwarf_decode_line_header (line_offset
, this);
10981 start_symtab ("", NULL
, 0);
10984 gdb_assert (tu_group
->symtabs
== NULL
);
10985 gdb_assert (m_builder
== nullptr);
10986 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10987 m_builder
.reset (new struct buildsym_compunit
10988 (COMPUNIT_OBJFILE (cust
), "",
10989 COMPUNIT_DIRNAME (cust
),
10990 compunit_language (cust
),
10992 list_in_scope
= get_builder ()->get_file_symbols ();
10997 line_header
= lh
.release ();
10998 line_header_die_owner
= die
;
11002 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11004 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11005 still initializing it, and our caller (a few levels up)
11006 process_full_type_unit still needs to know if this is the first
11010 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11011 struct symtab
*, line_header
->file_names_size ());
11013 auto &file_names
= line_header
->file_names ();
11014 for (i
= 0; i
< file_names
.size (); ++i
)
11016 file_entry
&fe
= file_names
[i
];
11017 dwarf2_start_subfile (this, fe
.name
,
11018 fe
.include_dir (line_header
));
11019 buildsym_compunit
*b
= get_builder ();
11020 if (b
->get_current_subfile ()->symtab
== NULL
)
11022 /* NOTE: start_subfile will recognize when it's been
11023 passed a file it has already seen. So we can't
11024 assume there's a simple mapping from
11025 cu->line_header->file_names to subfiles, plus
11026 cu->line_header->file_names may contain dups. */
11027 b
->get_current_subfile ()->symtab
11028 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11031 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11032 tu_group
->symtabs
[i
] = fe
.symtab
;
11037 gdb_assert (m_builder
== nullptr);
11038 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11039 m_builder
.reset (new struct buildsym_compunit
11040 (COMPUNIT_OBJFILE (cust
), "",
11041 COMPUNIT_DIRNAME (cust
),
11042 compunit_language (cust
),
11044 list_in_scope
= get_builder ()->get_file_symbols ();
11046 auto &file_names
= line_header
->file_names ();
11047 for (i
= 0; i
< file_names
.size (); ++i
)
11049 file_entry
&fe
= file_names
[i
];
11050 fe
.symtab
= tu_group
->symtabs
[i
];
11054 /* The main symtab is allocated last. Type units don't have DW_AT_name
11055 so they don't have a "real" (so to speak) symtab anyway.
11056 There is later code that will assign the main symtab to all symbols
11057 that don't have one. We need to handle the case of a symbol with a
11058 missing symtab (DW_AT_decl_file) anyway. */
11061 /* Process DW_TAG_type_unit.
11062 For TUs we want to skip the first top level sibling if it's not the
11063 actual type being defined by this TU. In this case the first top
11064 level sibling is there to provide context only. */
11067 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11069 struct die_info
*child_die
;
11071 prepare_one_comp_unit (cu
, die
, language_minimal
);
11073 /* Initialize (or reinitialize) the machinery for building symtabs.
11074 We do this before processing child DIEs, so that the line header table
11075 is available for DW_AT_decl_file. */
11076 cu
->setup_type_unit_groups (die
);
11078 if (die
->child
!= NULL
)
11080 child_die
= die
->child
;
11081 while (child_die
&& child_die
->tag
)
11083 process_die (child_die
, cu
);
11084 child_die
= child_die
->sibling
;
11091 http://gcc.gnu.org/wiki/DebugFission
11092 http://gcc.gnu.org/wiki/DebugFissionDWP
11094 To simplify handling of both DWO files ("object" files with the DWARF info)
11095 and DWP files (a file with the DWOs packaged up into one file), we treat
11096 DWP files as having a collection of virtual DWO files. */
11099 hash_dwo_file (const void *item
)
11101 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11104 hash
= htab_hash_string (dwo_file
->dwo_name
);
11105 if (dwo_file
->comp_dir
!= NULL
)
11106 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11111 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11113 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11114 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11116 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11118 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11119 return lhs
->comp_dir
== rhs
->comp_dir
;
11120 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11123 /* Allocate a hash table for DWO files. */
11126 allocate_dwo_file_hash_table ()
11128 auto delete_dwo_file
= [] (void *item
)
11130 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11135 return htab_up (htab_create_alloc (41,
11142 /* Lookup DWO file DWO_NAME. */
11145 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11146 const char *dwo_name
,
11147 const char *comp_dir
)
11149 struct dwo_file find_entry
;
11152 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11153 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
11155 find_entry
.dwo_name
= dwo_name
;
11156 find_entry
.comp_dir
= comp_dir
;
11157 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11164 hash_dwo_unit (const void *item
)
11166 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11168 /* This drops the top 32 bits of the id, but is ok for a hash. */
11169 return dwo_unit
->signature
;
11173 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11175 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11176 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11178 /* The signature is assumed to be unique within the DWO file.
11179 So while object file CU dwo_id's always have the value zero,
11180 that's OK, assuming each object file DWO file has only one CU,
11181 and that's the rule for now. */
11182 return lhs
->signature
== rhs
->signature
;
11185 /* Allocate a hash table for DWO CUs,TUs.
11186 There is one of these tables for each of CUs,TUs for each DWO file. */
11189 allocate_dwo_unit_table ()
11191 /* Start out with a pretty small number.
11192 Generally DWO files contain only one CU and maybe some TUs. */
11193 return htab_up (htab_create_alloc (3,
11196 NULL
, xcalloc
, xfree
));
11199 /* die_reader_func for create_dwo_cu. */
11202 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11203 const gdb_byte
*info_ptr
,
11204 struct die_info
*comp_unit_die
,
11205 struct dwo_file
*dwo_file
,
11206 struct dwo_unit
*dwo_unit
)
11208 struct dwarf2_cu
*cu
= reader
->cu
;
11209 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11210 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11212 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11213 if (!signature
.has_value ())
11215 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11216 " its dwo_id [in module %s]"),
11217 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11221 dwo_unit
->dwo_file
= dwo_file
;
11222 dwo_unit
->signature
= *signature
;
11223 dwo_unit
->section
= section
;
11224 dwo_unit
->sect_off
= sect_off
;
11225 dwo_unit
->length
= cu
->per_cu
->length
;
11227 if (dwarf_read_debug
)
11228 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11229 sect_offset_str (sect_off
),
11230 hex_string (dwo_unit
->signature
));
11233 /* Create the dwo_units for the CUs in a DWO_FILE.
11234 Note: This function processes DWO files only, not DWP files. */
11237 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11238 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11239 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11241 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11242 const gdb_byte
*info_ptr
, *end_ptr
;
11244 section
.read (objfile
);
11245 info_ptr
= section
.buffer
;
11247 if (info_ptr
== NULL
)
11250 if (dwarf_read_debug
)
11252 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11253 section
.get_name (),
11254 section
.get_file_name ());
11257 end_ptr
= info_ptr
+ section
.size
;
11258 while (info_ptr
< end_ptr
)
11260 struct dwarf2_per_cu_data per_cu
;
11261 struct dwo_unit read_unit
{};
11262 struct dwo_unit
*dwo_unit
;
11264 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11266 memset (&per_cu
, 0, sizeof (per_cu
));
11267 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11268 per_cu
.is_debug_types
= 0;
11269 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11270 per_cu
.section
= §ion
;
11272 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11273 if (!reader
.dummy_p
)
11274 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11275 &dwo_file
, &read_unit
);
11276 info_ptr
+= per_cu
.length
;
11278 // If the unit could not be parsed, skip it.
11279 if (read_unit
.dwo_file
== NULL
)
11282 if (cus_htab
== NULL
)
11283 cus_htab
= allocate_dwo_unit_table ();
11285 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
,
11287 *dwo_unit
= read_unit
;
11288 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11289 gdb_assert (slot
!= NULL
);
11292 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11293 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11295 complaint (_("debug cu entry at offset %s is duplicate to"
11296 " the entry at offset %s, signature %s"),
11297 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11298 hex_string (dwo_unit
->signature
));
11300 *slot
= (void *)dwo_unit
;
11304 /* DWP file .debug_{cu,tu}_index section format:
11305 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11309 Both index sections have the same format, and serve to map a 64-bit
11310 signature to a set of section numbers. Each section begins with a header,
11311 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11312 indexes, and a pool of 32-bit section numbers. The index sections will be
11313 aligned at 8-byte boundaries in the file.
11315 The index section header consists of:
11317 V, 32 bit version number
11319 N, 32 bit number of compilation units or type units in the index
11320 M, 32 bit number of slots in the hash table
11322 Numbers are recorded using the byte order of the application binary.
11324 The hash table begins at offset 16 in the section, and consists of an array
11325 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11326 order of the application binary). Unused slots in the hash table are 0.
11327 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11329 The parallel table begins immediately after the hash table
11330 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11331 array of 32-bit indexes (using the byte order of the application binary),
11332 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11333 table contains a 32-bit index into the pool of section numbers. For unused
11334 hash table slots, the corresponding entry in the parallel table will be 0.
11336 The pool of section numbers begins immediately following the hash table
11337 (at offset 16 + 12 * M from the beginning of the section). The pool of
11338 section numbers consists of an array of 32-bit words (using the byte order
11339 of the application binary). Each item in the array is indexed starting
11340 from 0. The hash table entry provides the index of the first section
11341 number in the set. Additional section numbers in the set follow, and the
11342 set is terminated by a 0 entry (section number 0 is not used in ELF).
11344 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11345 section must be the first entry in the set, and the .debug_abbrev.dwo must
11346 be the second entry. Other members of the set may follow in any order.
11352 DWP Version 2 combines all the .debug_info, etc. sections into one,
11353 and the entries in the index tables are now offsets into these sections.
11354 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11357 Index Section Contents:
11359 Hash Table of Signatures dwp_hash_table.hash_table
11360 Parallel Table of Indices dwp_hash_table.unit_table
11361 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11362 Table of Section Sizes dwp_hash_table.v2.sizes
11364 The index section header consists of:
11366 V, 32 bit version number
11367 L, 32 bit number of columns in the table of section offsets
11368 N, 32 bit number of compilation units or type units in the index
11369 M, 32 bit number of slots in the hash table
11371 Numbers are recorded using the byte order of the application binary.
11373 The hash table has the same format as version 1.
11374 The parallel table of indices has the same format as version 1,
11375 except that the entries are origin-1 indices into the table of sections
11376 offsets and the table of section sizes.
11378 The table of offsets begins immediately following the parallel table
11379 (at offset 16 + 12 * M from the beginning of the section). The table is
11380 a two-dimensional array of 32-bit words (using the byte order of the
11381 application binary), with L columns and N+1 rows, in row-major order.
11382 Each row in the array is indexed starting from 0. The first row provides
11383 a key to the remaining rows: each column in this row provides an identifier
11384 for a debug section, and the offsets in the same column of subsequent rows
11385 refer to that section. The section identifiers are:
11387 DW_SECT_INFO 1 .debug_info.dwo
11388 DW_SECT_TYPES 2 .debug_types.dwo
11389 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11390 DW_SECT_LINE 4 .debug_line.dwo
11391 DW_SECT_LOC 5 .debug_loc.dwo
11392 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11393 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11394 DW_SECT_MACRO 8 .debug_macro.dwo
11396 The offsets provided by the CU and TU index sections are the base offsets
11397 for the contributions made by each CU or TU to the corresponding section
11398 in the package file. Each CU and TU header contains an abbrev_offset
11399 field, used to find the abbreviations table for that CU or TU within the
11400 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11401 be interpreted as relative to the base offset given in the index section.
11402 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11403 should be interpreted as relative to the base offset for .debug_line.dwo,
11404 and offsets into other debug sections obtained from DWARF attributes should
11405 also be interpreted as relative to the corresponding base offset.
11407 The table of sizes begins immediately following the table of offsets.
11408 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11409 with L columns and N rows, in row-major order. Each row in the array is
11410 indexed starting from 1 (row 0 is shared by the two tables).
11414 Hash table lookup is handled the same in version 1 and 2:
11416 We assume that N and M will not exceed 2^32 - 1.
11417 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11419 Given a 64-bit compilation unit signature or a type signature S, an entry
11420 in the hash table is located as follows:
11422 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11423 the low-order k bits all set to 1.
11425 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11427 3) If the hash table entry at index H matches the signature, use that
11428 entry. If the hash table entry at index H is unused (all zeroes),
11429 terminate the search: the signature is not present in the table.
11431 4) Let H = (H + H') modulo M. Repeat at Step 3.
11433 Because M > N and H' and M are relatively prime, the search is guaranteed
11434 to stop at an unused slot or find the match. */
11436 /* Create a hash table to map DWO IDs to their CU/TU entry in
11437 .debug_{info,types}.dwo in DWP_FILE.
11438 Returns NULL if there isn't one.
11439 Note: This function processes DWP files only, not DWO files. */
11441 static struct dwp_hash_table
*
11442 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11443 struct dwp_file
*dwp_file
, int is_debug_types
)
11445 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11446 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11447 const gdb_byte
*index_ptr
, *index_end
;
11448 struct dwarf2_section_info
*index
;
11449 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11450 struct dwp_hash_table
*htab
;
11452 if (is_debug_types
)
11453 index
= &dwp_file
->sections
.tu_index
;
11455 index
= &dwp_file
->sections
.cu_index
;
11457 if (index
->empty ())
11459 index
->read (objfile
);
11461 index_ptr
= index
->buffer
;
11462 index_end
= index_ptr
+ index
->size
;
11464 version
= read_4_bytes (dbfd
, index_ptr
);
11467 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11471 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11473 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11476 if (version
!= 1 && version
!= 2)
11478 error (_("Dwarf Error: unsupported DWP file version (%s)"
11479 " [in module %s]"),
11480 pulongest (version
), dwp_file
->name
);
11482 if (nr_slots
!= (nr_slots
& -nr_slots
))
11484 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11485 " is not power of 2 [in module %s]"),
11486 pulongest (nr_slots
), dwp_file
->name
);
11489 htab
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
, struct dwp_hash_table
);
11490 htab
->version
= version
;
11491 htab
->nr_columns
= nr_columns
;
11492 htab
->nr_units
= nr_units
;
11493 htab
->nr_slots
= nr_slots
;
11494 htab
->hash_table
= index_ptr
;
11495 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11497 /* Exit early if the table is empty. */
11498 if (nr_slots
== 0 || nr_units
== 0
11499 || (version
== 2 && nr_columns
== 0))
11501 /* All must be zero. */
11502 if (nr_slots
!= 0 || nr_units
!= 0
11503 || (version
== 2 && nr_columns
!= 0))
11505 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11506 " all zero [in modules %s]"),
11514 htab
->section_pool
.v1
.indices
=
11515 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11516 /* It's harder to decide whether the section is too small in v1.
11517 V1 is deprecated anyway so we punt. */
11521 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11522 int *ids
= htab
->section_pool
.v2
.section_ids
;
11523 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11524 /* Reverse map for error checking. */
11525 int ids_seen
[DW_SECT_MAX
+ 1];
11528 if (nr_columns
< 2)
11530 error (_("Dwarf Error: bad DWP hash table, too few columns"
11531 " in section table [in module %s]"),
11534 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11536 error (_("Dwarf Error: bad DWP hash table, too many columns"
11537 " in section table [in module %s]"),
11540 memset (ids
, 255, sizeof_ids
);
11541 memset (ids_seen
, 255, sizeof (ids_seen
));
11542 for (i
= 0; i
< nr_columns
; ++i
)
11544 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11546 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11548 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11549 " in section table [in module %s]"),
11550 id
, dwp_file
->name
);
11552 if (ids_seen
[id
] != -1)
11554 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11555 " id %d in section table [in module %s]"),
11556 id
, dwp_file
->name
);
11561 /* Must have exactly one info or types section. */
11562 if (((ids_seen
[DW_SECT_INFO
] != -1)
11563 + (ids_seen
[DW_SECT_TYPES
] != -1))
11566 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11567 " DWO info/types section [in module %s]"),
11570 /* Must have an abbrev section. */
11571 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11573 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11574 " section [in module %s]"),
11577 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11578 htab
->section_pool
.v2
.sizes
=
11579 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11580 * nr_units
* nr_columns
);
11581 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11582 * nr_units
* nr_columns
))
11585 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11586 " [in module %s]"),
11594 /* Update SECTIONS with the data from SECTP.
11596 This function is like the other "locate" section routines that are
11597 passed to bfd_map_over_sections, but in this context the sections to
11598 read comes from the DWP V1 hash table, not the full ELF section table.
11600 The result is non-zero for success, or zero if an error was found. */
11603 locate_v1_virtual_dwo_sections (asection
*sectp
,
11604 struct virtual_v1_dwo_sections
*sections
)
11606 const struct dwop_section_names
*names
= &dwop_section_names
;
11608 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11610 /* There can be only one. */
11611 if (sections
->abbrev
.s
.section
!= NULL
)
11613 sections
->abbrev
.s
.section
= sectp
;
11614 sections
->abbrev
.size
= bfd_section_size (sectp
);
11616 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11617 || section_is_p (sectp
->name
, &names
->types_dwo
))
11619 /* There can be only one. */
11620 if (sections
->info_or_types
.s
.section
!= NULL
)
11622 sections
->info_or_types
.s
.section
= sectp
;
11623 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11625 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11627 /* There can be only one. */
11628 if (sections
->line
.s
.section
!= NULL
)
11630 sections
->line
.s
.section
= sectp
;
11631 sections
->line
.size
= bfd_section_size (sectp
);
11633 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11635 /* There can be only one. */
11636 if (sections
->loc
.s
.section
!= NULL
)
11638 sections
->loc
.s
.section
= sectp
;
11639 sections
->loc
.size
= bfd_section_size (sectp
);
11641 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11643 /* There can be only one. */
11644 if (sections
->macinfo
.s
.section
!= NULL
)
11646 sections
->macinfo
.s
.section
= sectp
;
11647 sections
->macinfo
.size
= bfd_section_size (sectp
);
11649 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11651 /* There can be only one. */
11652 if (sections
->macro
.s
.section
!= NULL
)
11654 sections
->macro
.s
.section
= sectp
;
11655 sections
->macro
.size
= bfd_section_size (sectp
);
11657 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11659 /* There can be only one. */
11660 if (sections
->str_offsets
.s
.section
!= NULL
)
11662 sections
->str_offsets
.s
.section
= sectp
;
11663 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11667 /* No other kind of section is valid. */
11674 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11675 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11676 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11677 This is for DWP version 1 files. */
11679 static struct dwo_unit
*
11680 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11681 struct dwp_file
*dwp_file
,
11682 uint32_t unit_index
,
11683 const char *comp_dir
,
11684 ULONGEST signature
, int is_debug_types
)
11686 const struct dwp_hash_table
*dwp_htab
=
11687 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11688 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11689 const char *kind
= is_debug_types
? "TU" : "CU";
11690 struct dwo_file
*dwo_file
;
11691 struct dwo_unit
*dwo_unit
;
11692 struct virtual_v1_dwo_sections sections
;
11693 void **dwo_file_slot
;
11696 gdb_assert (dwp_file
->version
== 1);
11698 if (dwarf_read_debug
)
11700 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11702 pulongest (unit_index
), hex_string (signature
),
11706 /* Fetch the sections of this DWO unit.
11707 Put a limit on the number of sections we look for so that bad data
11708 doesn't cause us to loop forever. */
11710 #define MAX_NR_V1_DWO_SECTIONS \
11711 (1 /* .debug_info or .debug_types */ \
11712 + 1 /* .debug_abbrev */ \
11713 + 1 /* .debug_line */ \
11714 + 1 /* .debug_loc */ \
11715 + 1 /* .debug_str_offsets */ \
11716 + 1 /* .debug_macro or .debug_macinfo */ \
11717 + 1 /* trailing zero */)
11719 memset (§ions
, 0, sizeof (sections
));
11721 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11724 uint32_t section_nr
=
11725 read_4_bytes (dbfd
,
11726 dwp_htab
->section_pool
.v1
.indices
11727 + (unit_index
+ i
) * sizeof (uint32_t));
11729 if (section_nr
== 0)
11731 if (section_nr
>= dwp_file
->num_sections
)
11733 error (_("Dwarf Error: bad DWP hash table, section number too large"
11734 " [in module %s]"),
11738 sectp
= dwp_file
->elf_sections
[section_nr
];
11739 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11741 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11742 " [in module %s]"),
11748 || sections
.info_or_types
.empty ()
11749 || sections
.abbrev
.empty ())
11751 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11752 " [in module %s]"),
11755 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11757 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11758 " [in module %s]"),
11762 /* It's easier for the rest of the code if we fake a struct dwo_file and
11763 have dwo_unit "live" in that. At least for now.
11765 The DWP file can be made up of a random collection of CUs and TUs.
11766 However, for each CU + set of TUs that came from the same original DWO
11767 file, we can combine them back into a virtual DWO file to save space
11768 (fewer struct dwo_file objects to allocate). Remember that for really
11769 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11771 std::string virtual_dwo_name
=
11772 string_printf ("virtual-dwo/%d-%d-%d-%d",
11773 sections
.abbrev
.get_id (),
11774 sections
.line
.get_id (),
11775 sections
.loc
.get_id (),
11776 sections
.str_offsets
.get_id ());
11777 /* Can we use an existing virtual DWO file? */
11778 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11779 virtual_dwo_name
.c_str (),
11781 /* Create one if necessary. */
11782 if (*dwo_file_slot
== NULL
)
11784 if (dwarf_read_debug
)
11786 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11787 virtual_dwo_name
.c_str ());
11789 dwo_file
= new struct dwo_file
;
11790 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
11791 dwo_file
->comp_dir
= comp_dir
;
11792 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11793 dwo_file
->sections
.line
= sections
.line
;
11794 dwo_file
->sections
.loc
= sections
.loc
;
11795 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11796 dwo_file
->sections
.macro
= sections
.macro
;
11797 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11798 /* The "str" section is global to the entire DWP file. */
11799 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11800 /* The info or types section is assigned below to dwo_unit,
11801 there's no need to record it in dwo_file.
11802 Also, we can't simply record type sections in dwo_file because
11803 we record a pointer into the vector in dwo_unit. As we collect more
11804 types we'll grow the vector and eventually have to reallocate space
11805 for it, invalidating all copies of pointers into the previous
11807 *dwo_file_slot
= dwo_file
;
11811 if (dwarf_read_debug
)
11813 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11814 virtual_dwo_name
.c_str ());
11816 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11819 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
, struct dwo_unit
);
11820 dwo_unit
->dwo_file
= dwo_file
;
11821 dwo_unit
->signature
= signature
;
11822 dwo_unit
->section
=
11823 XOBNEW (&dwarf2_per_objfile
->obstack
, struct dwarf2_section_info
);
11824 *dwo_unit
->section
= sections
.info_or_types
;
11825 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11830 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11831 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11832 piece within that section used by a TU/CU, return a virtual section
11833 of just that piece. */
11835 static struct dwarf2_section_info
11836 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11837 struct dwarf2_section_info
*section
,
11838 bfd_size_type offset
, bfd_size_type size
)
11840 struct dwarf2_section_info result
;
11843 gdb_assert (section
!= NULL
);
11844 gdb_assert (!section
->is_virtual
);
11846 memset (&result
, 0, sizeof (result
));
11847 result
.s
.containing_section
= section
;
11848 result
.is_virtual
= true;
11853 sectp
= section
->get_bfd_section ();
11855 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11856 bounds of the real section. This is a pretty-rare event, so just
11857 flag an error (easier) instead of a warning and trying to cope. */
11859 || offset
+ size
> bfd_section_size (sectp
))
11861 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11862 " in section %s [in module %s]"),
11863 sectp
? bfd_section_name (sectp
) : "<unknown>",
11864 objfile_name (dwarf2_per_objfile
->objfile
));
11867 result
.virtual_offset
= offset
;
11868 result
.size
= size
;
11872 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11873 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11874 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11875 This is for DWP version 2 files. */
11877 static struct dwo_unit
*
11878 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11879 struct dwp_file
*dwp_file
,
11880 uint32_t unit_index
,
11881 const char *comp_dir
,
11882 ULONGEST signature
, int is_debug_types
)
11884 const struct dwp_hash_table
*dwp_htab
=
11885 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11886 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11887 const char *kind
= is_debug_types
? "TU" : "CU";
11888 struct dwo_file
*dwo_file
;
11889 struct dwo_unit
*dwo_unit
;
11890 struct virtual_v2_dwo_sections sections
;
11891 void **dwo_file_slot
;
11894 gdb_assert (dwp_file
->version
== 2);
11896 if (dwarf_read_debug
)
11898 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11900 pulongest (unit_index
), hex_string (signature
),
11904 /* Fetch the section offsets of this DWO unit. */
11906 memset (§ions
, 0, sizeof (sections
));
11908 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11910 uint32_t offset
= read_4_bytes (dbfd
,
11911 dwp_htab
->section_pool
.v2
.offsets
11912 + (((unit_index
- 1) * dwp_htab
->nr_columns
11914 * sizeof (uint32_t)));
11915 uint32_t size
= read_4_bytes (dbfd
,
11916 dwp_htab
->section_pool
.v2
.sizes
11917 + (((unit_index
- 1) * dwp_htab
->nr_columns
11919 * sizeof (uint32_t)));
11921 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11924 case DW_SECT_TYPES
:
11925 sections
.info_or_types_offset
= offset
;
11926 sections
.info_or_types_size
= size
;
11928 case DW_SECT_ABBREV
:
11929 sections
.abbrev_offset
= offset
;
11930 sections
.abbrev_size
= size
;
11933 sections
.line_offset
= offset
;
11934 sections
.line_size
= size
;
11937 sections
.loc_offset
= offset
;
11938 sections
.loc_size
= size
;
11940 case DW_SECT_STR_OFFSETS
:
11941 sections
.str_offsets_offset
= offset
;
11942 sections
.str_offsets_size
= size
;
11944 case DW_SECT_MACINFO
:
11945 sections
.macinfo_offset
= offset
;
11946 sections
.macinfo_size
= size
;
11948 case DW_SECT_MACRO
:
11949 sections
.macro_offset
= offset
;
11950 sections
.macro_size
= size
;
11955 /* It's easier for the rest of the code if we fake a struct dwo_file and
11956 have dwo_unit "live" in that. At least for now.
11958 The DWP file can be made up of a random collection of CUs and TUs.
11959 However, for each CU + set of TUs that came from the same original DWO
11960 file, we can combine them back into a virtual DWO file to save space
11961 (fewer struct dwo_file objects to allocate). Remember that for really
11962 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11964 std::string virtual_dwo_name
=
11965 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11966 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11967 (long) (sections
.line_size
? sections
.line_offset
: 0),
11968 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11969 (long) (sections
.str_offsets_size
11970 ? sections
.str_offsets_offset
: 0));
11971 /* Can we use an existing virtual DWO file? */
11972 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11973 virtual_dwo_name
.c_str (),
11975 /* Create one if necessary. */
11976 if (*dwo_file_slot
== NULL
)
11978 if (dwarf_read_debug
)
11980 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11981 virtual_dwo_name
.c_str ());
11983 dwo_file
= new struct dwo_file
;
11984 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
11985 dwo_file
->comp_dir
= comp_dir
;
11986 dwo_file
->sections
.abbrev
=
11987 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11988 sections
.abbrev_offset
, sections
.abbrev_size
);
11989 dwo_file
->sections
.line
=
11990 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
11991 sections
.line_offset
, sections
.line_size
);
11992 dwo_file
->sections
.loc
=
11993 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
11994 sections
.loc_offset
, sections
.loc_size
);
11995 dwo_file
->sections
.macinfo
=
11996 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
11997 sections
.macinfo_offset
, sections
.macinfo_size
);
11998 dwo_file
->sections
.macro
=
11999 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12000 sections
.macro_offset
, sections
.macro_size
);
12001 dwo_file
->sections
.str_offsets
=
12002 create_dwp_v2_section (dwarf2_per_objfile
,
12003 &dwp_file
->sections
.str_offsets
,
12004 sections
.str_offsets_offset
,
12005 sections
.str_offsets_size
);
12006 /* The "str" section is global to the entire DWP file. */
12007 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12008 /* The info or types section is assigned below to dwo_unit,
12009 there's no need to record it in dwo_file.
12010 Also, we can't simply record type sections in dwo_file because
12011 we record a pointer into the vector in dwo_unit. As we collect more
12012 types we'll grow the vector and eventually have to reallocate space
12013 for it, invalidating all copies of pointers into the previous
12015 *dwo_file_slot
= dwo_file
;
12019 if (dwarf_read_debug
)
12021 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12022 virtual_dwo_name
.c_str ());
12024 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12027 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->obstack
, struct dwo_unit
);
12028 dwo_unit
->dwo_file
= dwo_file
;
12029 dwo_unit
->signature
= signature
;
12030 dwo_unit
->section
=
12031 XOBNEW (&dwarf2_per_objfile
->obstack
, struct dwarf2_section_info
);
12032 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12034 ? &dwp_file
->sections
.types
12035 : &dwp_file
->sections
.info
,
12036 sections
.info_or_types_offset
,
12037 sections
.info_or_types_size
);
12038 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12043 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12044 Returns NULL if the signature isn't found. */
12046 static struct dwo_unit
*
12047 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12048 struct dwp_file
*dwp_file
, const char *comp_dir
,
12049 ULONGEST signature
, int is_debug_types
)
12051 const struct dwp_hash_table
*dwp_htab
=
12052 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12053 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12054 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12055 uint32_t hash
= signature
& mask
;
12056 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12059 struct dwo_unit find_dwo_cu
;
12061 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12062 find_dwo_cu
.signature
= signature
;
12063 slot
= htab_find_slot (is_debug_types
12064 ? dwp_file
->loaded_tus
.get ()
12065 : dwp_file
->loaded_cus
.get (),
12066 &find_dwo_cu
, INSERT
);
12069 return (struct dwo_unit
*) *slot
;
12071 /* Use a for loop so that we don't loop forever on bad debug info. */
12072 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12074 ULONGEST signature_in_table
;
12076 signature_in_table
=
12077 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12078 if (signature_in_table
== signature
)
12080 uint32_t unit_index
=
12081 read_4_bytes (dbfd
,
12082 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12084 if (dwp_file
->version
== 1)
12086 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12087 dwp_file
, unit_index
,
12088 comp_dir
, signature
,
12093 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12094 dwp_file
, unit_index
,
12095 comp_dir
, signature
,
12098 return (struct dwo_unit
*) *slot
;
12100 if (signature_in_table
== 0)
12102 hash
= (hash
+ hash2
) & mask
;
12105 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12106 " [in module %s]"),
12110 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12111 Open the file specified by FILE_NAME and hand it off to BFD for
12112 preliminary analysis. Return a newly initialized bfd *, which
12113 includes a canonicalized copy of FILE_NAME.
12114 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12115 SEARCH_CWD is true if the current directory is to be searched.
12116 It will be searched before debug-file-directory.
12117 If successful, the file is added to the bfd include table of the
12118 objfile's bfd (see gdb_bfd_record_inclusion).
12119 If unable to find/open the file, return NULL.
12120 NOTE: This function is derived from symfile_bfd_open. */
12122 static gdb_bfd_ref_ptr
12123 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12124 const char *file_name
, int is_dwp
, int search_cwd
)
12127 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12128 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12129 to debug_file_directory. */
12130 const char *search_path
;
12131 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12133 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12136 if (*debug_file_directory
!= '\0')
12138 search_path_holder
.reset (concat (".", dirname_separator_string
,
12139 debug_file_directory
,
12141 search_path
= search_path_holder
.get ();
12147 search_path
= debug_file_directory
;
12149 openp_flags flags
= OPF_RETURN_REALPATH
;
12151 flags
|= OPF_SEARCH_IN_PATH
;
12153 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12154 desc
= openp (search_path
, flags
, file_name
,
12155 O_RDONLY
| O_BINARY
, &absolute_name
);
12159 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12161 if (sym_bfd
== NULL
)
12163 bfd_set_cacheable (sym_bfd
.get (), 1);
12165 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12168 /* Success. Record the bfd as having been included by the objfile's bfd.
12169 This is important because things like demangled_names_hash lives in the
12170 objfile's per_bfd space and may have references to things like symbol
12171 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12172 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12177 /* Try to open DWO file FILE_NAME.
12178 COMP_DIR is the DW_AT_comp_dir attribute.
12179 The result is the bfd handle of the file.
12180 If there is a problem finding or opening the file, return NULL.
12181 Upon success, the canonicalized path of the file is stored in the bfd,
12182 same as symfile_bfd_open. */
12184 static gdb_bfd_ref_ptr
12185 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12186 const char *file_name
, const char *comp_dir
)
12188 if (IS_ABSOLUTE_PATH (file_name
))
12189 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12190 0 /*is_dwp*/, 0 /*search_cwd*/);
12192 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12194 if (comp_dir
!= NULL
)
12196 gdb::unique_xmalloc_ptr
<char> path_to_try
12197 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12199 /* NOTE: If comp_dir is a relative path, this will also try the
12200 search path, which seems useful. */
12201 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12202 path_to_try
.get (),
12204 1 /*search_cwd*/));
12209 /* That didn't work, try debug-file-directory, which, despite its name,
12210 is a list of paths. */
12212 if (*debug_file_directory
== '\0')
12215 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12216 0 /*is_dwp*/, 1 /*search_cwd*/);
12219 /* This function is mapped across the sections and remembers the offset and
12220 size of each of the DWO debugging sections we are interested in. */
12223 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12225 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12226 const struct dwop_section_names
*names
= &dwop_section_names
;
12228 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12230 dwo_sections
->abbrev
.s
.section
= sectp
;
12231 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12233 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12235 dwo_sections
->info
.s
.section
= sectp
;
12236 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12238 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12240 dwo_sections
->line
.s
.section
= sectp
;
12241 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12243 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12245 dwo_sections
->loc
.s
.section
= sectp
;
12246 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12248 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12250 dwo_sections
->loclists
.s
.section
= sectp
;
12251 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12253 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12255 dwo_sections
->macinfo
.s
.section
= sectp
;
12256 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12258 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12260 dwo_sections
->macro
.s
.section
= sectp
;
12261 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12263 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12265 dwo_sections
->str
.s
.section
= sectp
;
12266 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12268 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12270 dwo_sections
->str_offsets
.s
.section
= sectp
;
12271 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12273 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12275 struct dwarf2_section_info type_section
;
12277 memset (&type_section
, 0, sizeof (type_section
));
12278 type_section
.s
.section
= sectp
;
12279 type_section
.size
= bfd_section_size (sectp
);
12280 dwo_sections
->types
.push_back (type_section
);
12284 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12285 by PER_CU. This is for the non-DWP case.
12286 The result is NULL if DWO_NAME can't be found. */
12288 static struct dwo_file
*
12289 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12290 const char *dwo_name
, const char *comp_dir
)
12292 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12294 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12297 if (dwarf_read_debug
)
12298 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12302 dwo_file_up
dwo_file (new struct dwo_file
);
12303 dwo_file
->dwo_name
= dwo_name
;
12304 dwo_file
->comp_dir
= comp_dir
;
12305 dwo_file
->dbfd
= std::move (dbfd
);
12307 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12308 &dwo_file
->sections
);
12310 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12311 dwo_file
->sections
.info
, dwo_file
->cus
);
12313 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12314 dwo_file
->sections
.types
, dwo_file
->tus
);
12316 if (dwarf_read_debug
)
12317 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12319 return dwo_file
.release ();
12322 /* This function is mapped across the sections and remembers the offset and
12323 size of each of the DWP debugging sections common to version 1 and 2 that
12324 we are interested in. */
12327 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12328 void *dwp_file_ptr
)
12330 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12331 const struct dwop_section_names
*names
= &dwop_section_names
;
12332 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12334 /* Record the ELF section number for later lookup: this is what the
12335 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12336 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12337 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12339 /* Look for specific sections that we need. */
12340 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12342 dwp_file
->sections
.str
.s
.section
= sectp
;
12343 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12345 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12347 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12348 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12350 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12352 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12353 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12357 /* This function is mapped across the sections and remembers the offset and
12358 size of each of the DWP version 2 debugging sections that we are interested
12359 in. This is split into a separate function because we don't know if we
12360 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12363 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12365 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12366 const struct dwop_section_names
*names
= &dwop_section_names
;
12367 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12369 /* Record the ELF section number for later lookup: this is what the
12370 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12371 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12372 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12374 /* Look for specific sections that we need. */
12375 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12377 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12378 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12380 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12382 dwp_file
->sections
.info
.s
.section
= sectp
;
12383 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12385 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12387 dwp_file
->sections
.line
.s
.section
= sectp
;
12388 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12390 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12392 dwp_file
->sections
.loc
.s
.section
= sectp
;
12393 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12395 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12397 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12398 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12400 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12402 dwp_file
->sections
.macro
.s
.section
= sectp
;
12403 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12405 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12407 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12408 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12410 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12412 dwp_file
->sections
.types
.s
.section
= sectp
;
12413 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12417 /* Hash function for dwp_file loaded CUs/TUs. */
12420 hash_dwp_loaded_cutus (const void *item
)
12422 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12424 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12425 return dwo_unit
->signature
;
12428 /* Equality function for dwp_file loaded CUs/TUs. */
12431 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12433 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12434 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12436 return dua
->signature
== dub
->signature
;
12439 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12442 allocate_dwp_loaded_cutus_table ()
12444 return htab_up (htab_create_alloc (3,
12445 hash_dwp_loaded_cutus
,
12446 eq_dwp_loaded_cutus
,
12447 NULL
, xcalloc
, xfree
));
12450 /* Try to open DWP file FILE_NAME.
12451 The result is the bfd handle of the file.
12452 If there is a problem finding or opening the file, return NULL.
12453 Upon success, the canonicalized path of the file is stored in the bfd,
12454 same as symfile_bfd_open. */
12456 static gdb_bfd_ref_ptr
12457 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12458 const char *file_name
)
12460 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12462 1 /*search_cwd*/));
12466 /* Work around upstream bug 15652.
12467 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12468 [Whether that's a "bug" is debatable, but it is getting in our way.]
12469 We have no real idea where the dwp file is, because gdb's realpath-ing
12470 of the executable's path may have discarded the needed info.
12471 [IWBN if the dwp file name was recorded in the executable, akin to
12472 .gnu_debuglink, but that doesn't exist yet.]
12473 Strip the directory from FILE_NAME and search again. */
12474 if (*debug_file_directory
!= '\0')
12476 /* Don't implicitly search the current directory here.
12477 If the user wants to search "." to handle this case,
12478 it must be added to debug-file-directory. */
12479 return try_open_dwop_file (dwarf2_per_objfile
,
12480 lbasename (file_name
), 1 /*is_dwp*/,
12487 /* Initialize the use of the DWP file for the current objfile.
12488 By convention the name of the DWP file is ${objfile}.dwp.
12489 The result is NULL if it can't be found. */
12491 static std::unique_ptr
<struct dwp_file
>
12492 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12494 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12496 /* Try to find first .dwp for the binary file before any symbolic links
12499 /* If the objfile is a debug file, find the name of the real binary
12500 file and get the name of dwp file from there. */
12501 std::string dwp_name
;
12502 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12504 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12505 const char *backlink_basename
= lbasename (backlink
->original_name
);
12507 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12510 dwp_name
= objfile
->original_name
;
12512 dwp_name
+= ".dwp";
12514 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12516 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12518 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12519 dwp_name
= objfile_name (objfile
);
12520 dwp_name
+= ".dwp";
12521 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12526 if (dwarf_read_debug
)
12527 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12528 return std::unique_ptr
<dwp_file
> ();
12531 const char *name
= bfd_get_filename (dbfd
.get ());
12532 std::unique_ptr
<struct dwp_file
> dwp_file
12533 (new struct dwp_file (name
, std::move (dbfd
)));
12535 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12536 dwp_file
->elf_sections
=
12537 OBSTACK_CALLOC (&dwarf2_per_objfile
->obstack
,
12538 dwp_file
->num_sections
, asection
*);
12540 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12541 dwarf2_locate_common_dwp_sections
,
12544 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12547 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12550 /* The DWP file version is stored in the hash table. Oh well. */
12551 if (dwp_file
->cus
&& dwp_file
->tus
12552 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12554 /* Technically speaking, we should try to limp along, but this is
12555 pretty bizarre. We use pulongest here because that's the established
12556 portability solution (e.g, we cannot use %u for uint32_t). */
12557 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12558 " TU version %s [in DWP file %s]"),
12559 pulongest (dwp_file
->cus
->version
),
12560 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12564 dwp_file
->version
= dwp_file
->cus
->version
;
12565 else if (dwp_file
->tus
)
12566 dwp_file
->version
= dwp_file
->tus
->version
;
12568 dwp_file
->version
= 2;
12570 if (dwp_file
->version
== 2)
12571 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12572 dwarf2_locate_v2_dwp_sections
,
12575 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12576 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12578 if (dwarf_read_debug
)
12580 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12581 fprintf_unfiltered (gdb_stdlog
,
12582 " %s CUs, %s TUs\n",
12583 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12584 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12590 /* Wrapper around open_and_init_dwp_file, only open it once. */
12592 static struct dwp_file
*
12593 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12595 if (! dwarf2_per_objfile
->dwp_checked
)
12597 dwarf2_per_objfile
->dwp_file
12598 = open_and_init_dwp_file (dwarf2_per_objfile
);
12599 dwarf2_per_objfile
->dwp_checked
= 1;
12601 return dwarf2_per_objfile
->dwp_file
.get ();
12604 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12605 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12606 or in the DWP file for the objfile, referenced by THIS_UNIT.
12607 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12608 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12610 This is called, for example, when wanting to read a variable with a
12611 complex location. Therefore we don't want to do file i/o for every call.
12612 Therefore we don't want to look for a DWO file on every call.
12613 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12614 then we check if we've already seen DWO_NAME, and only THEN do we check
12617 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12618 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12620 static struct dwo_unit
*
12621 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12622 const char *dwo_name
, const char *comp_dir
,
12623 ULONGEST signature
, int is_debug_types
)
12625 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12626 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12627 const char *kind
= is_debug_types
? "TU" : "CU";
12628 void **dwo_file_slot
;
12629 struct dwo_file
*dwo_file
;
12630 struct dwp_file
*dwp_file
;
12632 /* First see if there's a DWP file.
12633 If we have a DWP file but didn't find the DWO inside it, don't
12634 look for the original DWO file. It makes gdb behave differently
12635 depending on whether one is debugging in the build tree. */
12637 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12638 if (dwp_file
!= NULL
)
12640 const struct dwp_hash_table
*dwp_htab
=
12641 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12643 if (dwp_htab
!= NULL
)
12645 struct dwo_unit
*dwo_cutu
=
12646 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12647 signature
, is_debug_types
);
12649 if (dwo_cutu
!= NULL
)
12651 if (dwarf_read_debug
)
12653 fprintf_unfiltered (gdb_stdlog
,
12654 "Virtual DWO %s %s found: @%s\n",
12655 kind
, hex_string (signature
),
12656 host_address_to_string (dwo_cutu
));
12664 /* No DWP file, look for the DWO file. */
12666 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12667 dwo_name
, comp_dir
);
12668 if (*dwo_file_slot
== NULL
)
12670 /* Read in the file and build a table of the CUs/TUs it contains. */
12671 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12673 /* NOTE: This will be NULL if unable to open the file. */
12674 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12676 if (dwo_file
!= NULL
)
12678 struct dwo_unit
*dwo_cutu
= NULL
;
12680 if (is_debug_types
&& dwo_file
->tus
)
12682 struct dwo_unit find_dwo_cutu
;
12684 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12685 find_dwo_cutu
.signature
= signature
;
12687 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12690 else if (!is_debug_types
&& dwo_file
->cus
)
12692 struct dwo_unit find_dwo_cutu
;
12694 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12695 find_dwo_cutu
.signature
= signature
;
12696 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12700 if (dwo_cutu
!= NULL
)
12702 if (dwarf_read_debug
)
12704 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12705 kind
, dwo_name
, hex_string (signature
),
12706 host_address_to_string (dwo_cutu
));
12713 /* We didn't find it. This could mean a dwo_id mismatch, or
12714 someone deleted the DWO/DWP file, or the search path isn't set up
12715 correctly to find the file. */
12717 if (dwarf_read_debug
)
12719 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12720 kind
, dwo_name
, hex_string (signature
));
12723 /* This is a warning and not a complaint because it can be caused by
12724 pilot error (e.g., user accidentally deleting the DWO). */
12726 /* Print the name of the DWP file if we looked there, helps the user
12727 better diagnose the problem. */
12728 std::string dwp_text
;
12730 if (dwp_file
!= NULL
)
12731 dwp_text
= string_printf (" [in DWP file %s]",
12732 lbasename (dwp_file
->name
));
12734 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12735 " [in module %s]"),
12736 kind
, dwo_name
, hex_string (signature
),
12738 this_unit
->is_debug_types
? "TU" : "CU",
12739 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12744 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12745 See lookup_dwo_cutu_unit for details. */
12747 static struct dwo_unit
*
12748 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12749 const char *dwo_name
, const char *comp_dir
,
12750 ULONGEST signature
)
12752 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12755 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12756 See lookup_dwo_cutu_unit for details. */
12758 static struct dwo_unit
*
12759 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12760 const char *dwo_name
, const char *comp_dir
)
12762 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12765 /* Traversal function for queue_and_load_all_dwo_tus. */
12768 queue_and_load_dwo_tu (void **slot
, void *info
)
12770 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12771 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12772 ULONGEST signature
= dwo_unit
->signature
;
12773 struct signatured_type
*sig_type
=
12774 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12776 if (sig_type
!= NULL
)
12778 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12780 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12781 a real dependency of PER_CU on SIG_TYPE. That is detected later
12782 while processing PER_CU. */
12783 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12784 load_full_type_unit (sig_cu
);
12785 per_cu
->imported_symtabs_push (sig_cu
);
12791 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12792 The DWO may have the only definition of the type, though it may not be
12793 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12794 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12797 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12799 struct dwo_unit
*dwo_unit
;
12800 struct dwo_file
*dwo_file
;
12802 gdb_assert (!per_cu
->is_debug_types
);
12803 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12804 gdb_assert (per_cu
->cu
!= NULL
);
12806 dwo_unit
= per_cu
->cu
->dwo_unit
;
12807 gdb_assert (dwo_unit
!= NULL
);
12809 dwo_file
= dwo_unit
->dwo_file
;
12810 if (dwo_file
->tus
!= NULL
)
12811 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12815 /* Read in various DIEs. */
12817 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12818 Inherit only the children of the DW_AT_abstract_origin DIE not being
12819 already referenced by DW_AT_abstract_origin from the children of the
12823 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12825 struct die_info
*child_die
;
12826 sect_offset
*offsetp
;
12827 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12828 struct die_info
*origin_die
;
12829 /* Iterator of the ORIGIN_DIE children. */
12830 struct die_info
*origin_child_die
;
12831 struct attribute
*attr
;
12832 struct dwarf2_cu
*origin_cu
;
12833 struct pending
**origin_previous_list_in_scope
;
12835 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12839 /* Note that following die references may follow to a die in a
12843 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12845 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12847 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12848 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12850 if (die
->tag
!= origin_die
->tag
12851 && !(die
->tag
== DW_TAG_inlined_subroutine
12852 && origin_die
->tag
== DW_TAG_subprogram
))
12853 complaint (_("DIE %s and its abstract origin %s have different tags"),
12854 sect_offset_str (die
->sect_off
),
12855 sect_offset_str (origin_die
->sect_off
));
12857 std::vector
<sect_offset
> offsets
;
12859 for (child_die
= die
->child
;
12860 child_die
&& child_die
->tag
;
12861 child_die
= child_die
->sibling
)
12863 struct die_info
*child_origin_die
;
12864 struct dwarf2_cu
*child_origin_cu
;
12866 /* We are trying to process concrete instance entries:
12867 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12868 it's not relevant to our analysis here. i.e. detecting DIEs that are
12869 present in the abstract instance but not referenced in the concrete
12871 if (child_die
->tag
== DW_TAG_call_site
12872 || child_die
->tag
== DW_TAG_GNU_call_site
)
12875 /* For each CHILD_DIE, find the corresponding child of
12876 ORIGIN_DIE. If there is more than one layer of
12877 DW_AT_abstract_origin, follow them all; there shouldn't be,
12878 but GCC versions at least through 4.4 generate this (GCC PR
12880 child_origin_die
= child_die
;
12881 child_origin_cu
= cu
;
12884 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12888 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12892 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12893 counterpart may exist. */
12894 if (child_origin_die
!= child_die
)
12896 if (child_die
->tag
!= child_origin_die
->tag
12897 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12898 && child_origin_die
->tag
== DW_TAG_subprogram
))
12899 complaint (_("Child DIE %s and its abstract origin %s have "
12901 sect_offset_str (child_die
->sect_off
),
12902 sect_offset_str (child_origin_die
->sect_off
));
12903 if (child_origin_die
->parent
!= origin_die
)
12904 complaint (_("Child DIE %s and its abstract origin %s have "
12905 "different parents"),
12906 sect_offset_str (child_die
->sect_off
),
12907 sect_offset_str (child_origin_die
->sect_off
));
12909 offsets
.push_back (child_origin_die
->sect_off
);
12912 std::sort (offsets
.begin (), offsets
.end ());
12913 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12914 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12915 if (offsetp
[-1] == *offsetp
)
12916 complaint (_("Multiple children of DIE %s refer "
12917 "to DIE %s as their abstract origin"),
12918 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12920 offsetp
= offsets
.data ();
12921 origin_child_die
= origin_die
->child
;
12922 while (origin_child_die
&& origin_child_die
->tag
)
12924 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12925 while (offsetp
< offsets_end
12926 && *offsetp
< origin_child_die
->sect_off
)
12928 if (offsetp
>= offsets_end
12929 || *offsetp
> origin_child_die
->sect_off
)
12931 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12932 Check whether we're already processing ORIGIN_CHILD_DIE.
12933 This can happen with mutually referenced abstract_origins.
12935 if (!origin_child_die
->in_process
)
12936 process_die (origin_child_die
, origin_cu
);
12938 origin_child_die
= origin_child_die
->sibling
;
12940 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12942 if (cu
!= origin_cu
)
12943 compute_delayed_physnames (origin_cu
);
12947 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12949 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12950 struct gdbarch
*gdbarch
= objfile
->arch ();
12951 struct context_stack
*newobj
;
12954 struct die_info
*child_die
;
12955 struct attribute
*attr
, *call_line
, *call_file
;
12957 CORE_ADDR baseaddr
;
12958 struct block
*block
;
12959 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12960 std::vector
<struct symbol
*> template_args
;
12961 struct template_symbol
*templ_func
= NULL
;
12965 /* If we do not have call site information, we can't show the
12966 caller of this inlined function. That's too confusing, so
12967 only use the scope for local variables. */
12968 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12969 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12970 if (call_line
== NULL
|| call_file
== NULL
)
12972 read_lexical_block_scope (die
, cu
);
12977 baseaddr
= objfile
->text_section_offset ();
12979 name
= dwarf2_name (die
, cu
);
12981 /* Ignore functions with missing or empty names. These are actually
12982 illegal according to the DWARF standard. */
12985 complaint (_("missing name for subprogram DIE at %s"),
12986 sect_offset_str (die
->sect_off
));
12990 /* Ignore functions with missing or invalid low and high pc attributes. */
12991 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12992 <= PC_BOUNDS_INVALID
)
12994 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12995 if (!attr
|| !DW_UNSND (attr
))
12996 complaint (_("cannot get low and high bounds "
12997 "for subprogram DIE at %s"),
12998 sect_offset_str (die
->sect_off
));
13002 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13003 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13005 /* If we have any template arguments, then we must allocate a
13006 different sort of symbol. */
13007 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13009 if (child_die
->tag
== DW_TAG_template_type_param
13010 || child_die
->tag
== DW_TAG_template_value_param
)
13012 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13013 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13018 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13019 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13020 (struct symbol
*) templ_func
);
13022 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13023 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13026 /* If there is a location expression for DW_AT_frame_base, record
13028 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13029 if (attr
!= nullptr)
13030 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13032 /* If there is a location for the static link, record it. */
13033 newobj
->static_link
= NULL
;
13034 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13035 if (attr
!= nullptr)
13037 newobj
->static_link
13038 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13039 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13040 cu
->per_cu
->addr_type ());
13043 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13045 if (die
->child
!= NULL
)
13047 child_die
= die
->child
;
13048 while (child_die
&& child_die
->tag
)
13050 if (child_die
->tag
== DW_TAG_template_type_param
13051 || child_die
->tag
== DW_TAG_template_value_param
)
13053 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13056 template_args
.push_back (arg
);
13059 process_die (child_die
, cu
);
13060 child_die
= child_die
->sibling
;
13064 inherit_abstract_dies (die
, cu
);
13066 /* If we have a DW_AT_specification, we might need to import using
13067 directives from the context of the specification DIE. See the
13068 comment in determine_prefix. */
13069 if (cu
->language
== language_cplus
13070 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13072 struct dwarf2_cu
*spec_cu
= cu
;
13073 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13077 child_die
= spec_die
->child
;
13078 while (child_die
&& child_die
->tag
)
13080 if (child_die
->tag
== DW_TAG_imported_module
)
13081 process_die (child_die
, spec_cu
);
13082 child_die
= child_die
->sibling
;
13085 /* In some cases, GCC generates specification DIEs that
13086 themselves contain DW_AT_specification attributes. */
13087 spec_die
= die_specification (spec_die
, &spec_cu
);
13091 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13092 /* Make a block for the local symbols within. */
13093 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13094 cstk
.static_link
, lowpc
, highpc
);
13096 /* For C++, set the block's scope. */
13097 if ((cu
->language
== language_cplus
13098 || cu
->language
== language_fortran
13099 || cu
->language
== language_d
13100 || cu
->language
== language_rust
)
13101 && cu
->processing_has_namespace_info
)
13102 block_set_scope (block
, determine_prefix (die
, cu
),
13103 &objfile
->objfile_obstack
);
13105 /* If we have address ranges, record them. */
13106 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13108 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13110 /* Attach template arguments to function. */
13111 if (!template_args
.empty ())
13113 gdb_assert (templ_func
!= NULL
);
13115 templ_func
->n_template_arguments
= template_args
.size ();
13116 templ_func
->template_arguments
13117 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13118 templ_func
->n_template_arguments
);
13119 memcpy (templ_func
->template_arguments
,
13120 template_args
.data (),
13121 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13123 /* Make sure that the symtab is set on the new symbols. Even
13124 though they don't appear in this symtab directly, other parts
13125 of gdb assume that symbols do, and this is reasonably
13127 for (symbol
*sym
: template_args
)
13128 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13131 /* In C++, we can have functions nested inside functions (e.g., when
13132 a function declares a class that has methods). This means that
13133 when we finish processing a function scope, we may need to go
13134 back to building a containing block's symbol lists. */
13135 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13136 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13138 /* If we've finished processing a top-level function, subsequent
13139 symbols go in the file symbol list. */
13140 if (cu
->get_builder ()->outermost_context_p ())
13141 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13144 /* Process all the DIES contained within a lexical block scope. Start
13145 a new scope, process the dies, and then close the scope. */
13148 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13150 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13151 struct gdbarch
*gdbarch
= objfile
->arch ();
13152 CORE_ADDR lowpc
, highpc
;
13153 struct die_info
*child_die
;
13154 CORE_ADDR baseaddr
;
13156 baseaddr
= objfile
->text_section_offset ();
13158 /* Ignore blocks with missing or invalid low and high pc attributes. */
13159 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13160 as multiple lexical blocks? Handling children in a sane way would
13161 be nasty. Might be easier to properly extend generic blocks to
13162 describe ranges. */
13163 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13165 case PC_BOUNDS_NOT_PRESENT
:
13166 /* DW_TAG_lexical_block has no attributes, process its children as if
13167 there was no wrapping by that DW_TAG_lexical_block.
13168 GCC does no longer produces such DWARF since GCC r224161. */
13169 for (child_die
= die
->child
;
13170 child_die
!= NULL
&& child_die
->tag
;
13171 child_die
= child_die
->sibling
)
13173 /* We might already be processing this DIE. This can happen
13174 in an unusual circumstance -- where a subroutine A
13175 appears lexically in another subroutine B, but A actually
13176 inlines B. The recursion is broken here, rather than in
13177 inherit_abstract_dies, because it seems better to simply
13178 drop concrete children here. */
13179 if (!child_die
->in_process
)
13180 process_die (child_die
, cu
);
13183 case PC_BOUNDS_INVALID
:
13186 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13187 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13189 cu
->get_builder ()->push_context (0, lowpc
);
13190 if (die
->child
!= NULL
)
13192 child_die
= die
->child
;
13193 while (child_die
&& child_die
->tag
)
13195 process_die (child_die
, cu
);
13196 child_die
= child_die
->sibling
;
13199 inherit_abstract_dies (die
, cu
);
13200 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13202 if (*cu
->get_builder ()->get_local_symbols () != NULL
13203 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13205 struct block
*block
13206 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13207 cstk
.start_addr
, highpc
);
13209 /* Note that recording ranges after traversing children, as we
13210 do here, means that recording a parent's ranges entails
13211 walking across all its children's ranges as they appear in
13212 the address map, which is quadratic behavior.
13214 It would be nicer to record the parent's ranges before
13215 traversing its children, simply overriding whatever you find
13216 there. But since we don't even decide whether to create a
13217 block until after we've traversed its children, that's hard
13219 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13221 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13222 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13225 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13228 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13230 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13231 struct gdbarch
*gdbarch
= objfile
->arch ();
13232 CORE_ADDR pc
, baseaddr
;
13233 struct attribute
*attr
;
13234 struct call_site
*call_site
, call_site_local
;
13237 struct die_info
*child_die
;
13239 baseaddr
= objfile
->text_section_offset ();
13241 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13244 /* This was a pre-DWARF-5 GNU extension alias
13245 for DW_AT_call_return_pc. */
13246 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13250 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13251 "DIE %s [in module %s]"),
13252 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13255 pc
= attr
->value_as_address () + baseaddr
;
13256 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13258 if (cu
->call_site_htab
== NULL
)
13259 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13260 NULL
, &objfile
->objfile_obstack
,
13261 hashtab_obstack_allocate
, NULL
);
13262 call_site_local
.pc
= pc
;
13263 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13266 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13267 "DIE %s [in module %s]"),
13268 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13269 objfile_name (objfile
));
13273 /* Count parameters at the caller. */
13276 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13277 child_die
= child_die
->sibling
)
13279 if (child_die
->tag
!= DW_TAG_call_site_parameter
13280 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13282 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13283 "DW_TAG_call_site child DIE %s [in module %s]"),
13284 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13285 objfile_name (objfile
));
13293 = ((struct call_site
*)
13294 obstack_alloc (&objfile
->objfile_obstack
,
13295 sizeof (*call_site
)
13296 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13298 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13299 call_site
->pc
= pc
;
13301 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13302 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13304 struct die_info
*func_die
;
13306 /* Skip also over DW_TAG_inlined_subroutine. */
13307 for (func_die
= die
->parent
;
13308 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13309 && func_die
->tag
!= DW_TAG_subroutine_type
;
13310 func_die
= func_die
->parent
);
13312 /* DW_AT_call_all_calls is a superset
13313 of DW_AT_call_all_tail_calls. */
13315 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13316 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13317 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13318 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13320 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13321 not complete. But keep CALL_SITE for look ups via call_site_htab,
13322 both the initial caller containing the real return address PC and
13323 the final callee containing the current PC of a chain of tail
13324 calls do not need to have the tail call list complete. But any
13325 function candidate for a virtual tail call frame searched via
13326 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13327 determined unambiguously. */
13331 struct type
*func_type
= NULL
;
13334 func_type
= get_die_type (func_die
, cu
);
13335 if (func_type
!= NULL
)
13337 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13339 /* Enlist this call site to the function. */
13340 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13341 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13344 complaint (_("Cannot find function owning DW_TAG_call_site "
13345 "DIE %s [in module %s]"),
13346 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13350 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13352 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13354 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13357 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13358 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13360 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13361 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13362 /* Keep NULL DWARF_BLOCK. */;
13363 else if (attr
->form_is_block ())
13365 struct dwarf2_locexpr_baton
*dlbaton
;
13367 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13368 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13369 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13370 dlbaton
->per_cu
= cu
->per_cu
;
13372 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13374 else if (attr
->form_is_ref ())
13376 struct dwarf2_cu
*target_cu
= cu
;
13377 struct die_info
*target_die
;
13379 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13380 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13381 if (die_is_declaration (target_die
, target_cu
))
13383 const char *target_physname
;
13385 /* Prefer the mangled name; otherwise compute the demangled one. */
13386 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13387 if (target_physname
== NULL
)
13388 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13389 if (target_physname
== NULL
)
13390 complaint (_("DW_AT_call_target target DIE has invalid "
13391 "physname, for referencing DIE %s [in module %s]"),
13392 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13394 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13400 /* DW_AT_entry_pc should be preferred. */
13401 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13402 <= PC_BOUNDS_INVALID
)
13403 complaint (_("DW_AT_call_target target DIE has invalid "
13404 "low pc, for referencing DIE %s [in module %s]"),
13405 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13408 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13409 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13414 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13415 "block nor reference, for DIE %s [in module %s]"),
13416 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13418 call_site
->per_cu
= cu
->per_cu
;
13420 for (child_die
= die
->child
;
13421 child_die
&& child_die
->tag
;
13422 child_die
= child_die
->sibling
)
13424 struct call_site_parameter
*parameter
;
13425 struct attribute
*loc
, *origin
;
13427 if (child_die
->tag
!= DW_TAG_call_site_parameter
13428 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13430 /* Already printed the complaint above. */
13434 gdb_assert (call_site
->parameter_count
< nparams
);
13435 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13437 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13438 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13439 register is contained in DW_AT_call_value. */
13441 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13442 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13443 if (origin
== NULL
)
13445 /* This was a pre-DWARF-5 GNU extension alias
13446 for DW_AT_call_parameter. */
13447 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13449 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13451 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13453 sect_offset sect_off
= origin
->get_ref_die_offset ();
13454 if (!cu
->header
.offset_in_cu_p (sect_off
))
13456 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13457 binding can be done only inside one CU. Such referenced DIE
13458 therefore cannot be even moved to DW_TAG_partial_unit. */
13459 complaint (_("DW_AT_call_parameter offset is not in CU for "
13460 "DW_TAG_call_site child DIE %s [in module %s]"),
13461 sect_offset_str (child_die
->sect_off
),
13462 objfile_name (objfile
));
13465 parameter
->u
.param_cu_off
13466 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13468 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13470 complaint (_("No DW_FORM_block* DW_AT_location for "
13471 "DW_TAG_call_site child DIE %s [in module %s]"),
13472 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13477 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13478 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13479 if (parameter
->u
.dwarf_reg
!= -1)
13480 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13481 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13482 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13483 ¶meter
->u
.fb_offset
))
13484 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13487 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13488 "for DW_FORM_block* DW_AT_location is supported for "
13489 "DW_TAG_call_site child DIE %s "
13491 sect_offset_str (child_die
->sect_off
),
13492 objfile_name (objfile
));
13497 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13499 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13500 if (attr
== NULL
|| !attr
->form_is_block ())
13502 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13503 "DW_TAG_call_site child DIE %s [in module %s]"),
13504 sect_offset_str (child_die
->sect_off
),
13505 objfile_name (objfile
));
13508 parameter
->value
= DW_BLOCK (attr
)->data
;
13509 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13511 /* Parameters are not pre-cleared by memset above. */
13512 parameter
->data_value
= NULL
;
13513 parameter
->data_value_size
= 0;
13514 call_site
->parameter_count
++;
13516 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13518 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13519 if (attr
!= nullptr)
13521 if (!attr
->form_is_block ())
13522 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13523 "DW_TAG_call_site child DIE %s [in module %s]"),
13524 sect_offset_str (child_die
->sect_off
),
13525 objfile_name (objfile
));
13528 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13529 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13535 /* Helper function for read_variable. If DIE represents a virtual
13536 table, then return the type of the concrete object that is
13537 associated with the virtual table. Otherwise, return NULL. */
13539 static struct type
*
13540 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13542 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13546 /* Find the type DIE. */
13547 struct die_info
*type_die
= NULL
;
13548 struct dwarf2_cu
*type_cu
= cu
;
13550 if (attr
->form_is_ref ())
13551 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13552 if (type_die
== NULL
)
13555 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13557 return die_containing_type (type_die
, type_cu
);
13560 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13563 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13565 struct rust_vtable_symbol
*storage
= NULL
;
13567 if (cu
->language
== language_rust
)
13569 struct type
*containing_type
= rust_containing_type (die
, cu
);
13571 if (containing_type
!= NULL
)
13573 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13575 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
13576 storage
->concrete_type
= containing_type
;
13577 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13581 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13582 struct attribute
*abstract_origin
13583 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13584 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13585 if (res
== NULL
&& loc
&& abstract_origin
)
13587 /* We have a variable without a name, but with a location and an abstract
13588 origin. This may be a concrete instance of an abstract variable
13589 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13591 struct dwarf2_cu
*origin_cu
= cu
;
13592 struct die_info
*origin_die
13593 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13594 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13595 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13599 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13600 reading .debug_rnglists.
13601 Callback's type should be:
13602 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13603 Return true if the attributes are present and valid, otherwise,
13606 template <typename Callback
>
13608 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13609 Callback
&&callback
)
13611 struct dwarf2_per_objfile
*dwarf2_per_objfile
13612 = cu
->per_cu
->dwarf2_per_objfile
;
13613 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13614 bfd
*obfd
= objfile
->obfd
;
13615 /* Base address selection entry. */
13616 gdb::optional
<CORE_ADDR
> base
;
13617 const gdb_byte
*buffer
;
13618 CORE_ADDR baseaddr
;
13619 bool overflow
= false;
13621 base
= cu
->base_address
;
13623 dwarf2_per_objfile
->rnglists
.read (objfile
);
13624 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13626 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13630 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13632 baseaddr
= objfile
->text_section_offset ();
13636 /* Initialize it due to a false compiler warning. */
13637 CORE_ADDR range_beginning
= 0, range_end
= 0;
13638 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13639 + dwarf2_per_objfile
->rnglists
.size
);
13640 unsigned int bytes_read
;
13642 if (buffer
== buf_end
)
13647 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13650 case DW_RLE_end_of_list
:
13652 case DW_RLE_base_address
:
13653 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13658 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13659 buffer
+= bytes_read
;
13661 case DW_RLE_start_length
:
13662 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13667 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13669 buffer
+= bytes_read
;
13670 range_end
= (range_beginning
13671 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13672 buffer
+= bytes_read
;
13673 if (buffer
> buf_end
)
13679 case DW_RLE_offset_pair
:
13680 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13681 buffer
+= bytes_read
;
13682 if (buffer
> buf_end
)
13687 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13688 buffer
+= bytes_read
;
13689 if (buffer
> buf_end
)
13695 case DW_RLE_start_end
:
13696 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13701 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13703 buffer
+= bytes_read
;
13704 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13705 buffer
+= bytes_read
;
13708 complaint (_("Invalid .debug_rnglists data (no base address)"));
13711 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13713 if (rlet
== DW_RLE_base_address
)
13716 if (!base
.has_value ())
13718 /* We have no valid base address for the ranges
13720 complaint (_("Invalid .debug_rnglists data (no base address)"));
13724 if (range_beginning
> range_end
)
13726 /* Inverted range entries are invalid. */
13727 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13731 /* Empty range entries have no effect. */
13732 if (range_beginning
== range_end
)
13735 range_beginning
+= *base
;
13736 range_end
+= *base
;
13738 /* A not-uncommon case of bad debug info.
13739 Don't pollute the addrmap with bad data. */
13740 if (range_beginning
+ baseaddr
== 0
13741 && !dwarf2_per_objfile
->has_section_at_zero
)
13743 complaint (_(".debug_rnglists entry has start address of zero"
13744 " [in module %s]"), objfile_name (objfile
));
13748 callback (range_beginning
, range_end
);
13753 complaint (_("Offset %d is not terminated "
13754 "for DW_AT_ranges attribute"),
13762 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13763 Callback's type should be:
13764 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13765 Return 1 if the attributes are present and valid, otherwise, return 0. */
13767 template <typename Callback
>
13769 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13770 Callback
&&callback
)
13772 struct dwarf2_per_objfile
*dwarf2_per_objfile
13773 = cu
->per_cu
->dwarf2_per_objfile
;
13774 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13775 struct comp_unit_head
*cu_header
= &cu
->header
;
13776 bfd
*obfd
= objfile
->obfd
;
13777 unsigned int addr_size
= cu_header
->addr_size
;
13778 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13779 /* Base address selection entry. */
13780 gdb::optional
<CORE_ADDR
> base
;
13781 unsigned int dummy
;
13782 const gdb_byte
*buffer
;
13783 CORE_ADDR baseaddr
;
13785 if (cu_header
->version
>= 5)
13786 return dwarf2_rnglists_process (offset
, cu
, callback
);
13788 base
= cu
->base_address
;
13790 dwarf2_per_objfile
->ranges
.read (objfile
);
13791 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13793 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13797 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13799 baseaddr
= objfile
->text_section_offset ();
13803 CORE_ADDR range_beginning
, range_end
;
13805 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13806 buffer
+= addr_size
;
13807 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13808 buffer
+= addr_size
;
13809 offset
+= 2 * addr_size
;
13811 /* An end of list marker is a pair of zero addresses. */
13812 if (range_beginning
== 0 && range_end
== 0)
13813 /* Found the end of list entry. */
13816 /* Each base address selection entry is a pair of 2 values.
13817 The first is the largest possible address, the second is
13818 the base address. Check for a base address here. */
13819 if ((range_beginning
& mask
) == mask
)
13821 /* If we found the largest possible address, then we already
13822 have the base address in range_end. */
13827 if (!base
.has_value ())
13829 /* We have no valid base address for the ranges
13831 complaint (_("Invalid .debug_ranges data (no base address)"));
13835 if (range_beginning
> range_end
)
13837 /* Inverted range entries are invalid. */
13838 complaint (_("Invalid .debug_ranges data (inverted range)"));
13842 /* Empty range entries have no effect. */
13843 if (range_beginning
== range_end
)
13846 range_beginning
+= *base
;
13847 range_end
+= *base
;
13849 /* A not-uncommon case of bad debug info.
13850 Don't pollute the addrmap with bad data. */
13851 if (range_beginning
+ baseaddr
== 0
13852 && !dwarf2_per_objfile
->has_section_at_zero
)
13854 complaint (_(".debug_ranges entry has start address of zero"
13855 " [in module %s]"), objfile_name (objfile
));
13859 callback (range_beginning
, range_end
);
13865 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13866 Return 1 if the attributes are present and valid, otherwise, return 0.
13867 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13870 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13871 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13872 dwarf2_psymtab
*ranges_pst
)
13874 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13875 struct gdbarch
*gdbarch
= objfile
->arch ();
13876 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13879 CORE_ADDR high
= 0;
13882 retval
= dwarf2_ranges_process (offset
, cu
,
13883 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13885 if (ranges_pst
!= NULL
)
13890 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13891 range_beginning
+ baseaddr
)
13893 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13894 range_end
+ baseaddr
)
13896 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13897 lowpc
, highpc
- 1, ranges_pst
);
13900 /* FIXME: This is recording everything as a low-high
13901 segment of consecutive addresses. We should have a
13902 data structure for discontiguous block ranges
13906 low
= range_beginning
;
13912 if (range_beginning
< low
)
13913 low
= range_beginning
;
13914 if (range_end
> high
)
13922 /* If the first entry is an end-of-list marker, the range
13923 describes an empty scope, i.e. no instructions. */
13929 *high_return
= high
;
13933 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13934 definition for the return value. *LOWPC and *HIGHPC are set iff
13935 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13937 static enum pc_bounds_kind
13938 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13939 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13940 dwarf2_psymtab
*pst
)
13942 struct dwarf2_per_objfile
*dwarf2_per_objfile
13943 = cu
->per_cu
->dwarf2_per_objfile
;
13944 struct attribute
*attr
;
13945 struct attribute
*attr_high
;
13947 CORE_ADDR high
= 0;
13948 enum pc_bounds_kind ret
;
13950 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13953 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13954 if (attr
!= nullptr)
13956 low
= attr
->value_as_address ();
13957 high
= attr_high
->value_as_address ();
13958 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13962 /* Found high w/o low attribute. */
13963 return PC_BOUNDS_INVALID
;
13965 /* Found consecutive range of addresses. */
13966 ret
= PC_BOUNDS_HIGH_LOW
;
13970 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13973 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13974 We take advantage of the fact that DW_AT_ranges does not appear
13975 in DW_TAG_compile_unit of DWO files. */
13976 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13977 unsigned int ranges_offset
= (DW_UNSND (attr
)
13978 + (need_ranges_base
13982 /* Value of the DW_AT_ranges attribute is the offset in the
13983 .debug_ranges section. */
13984 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13985 return PC_BOUNDS_INVALID
;
13986 /* Found discontinuous range of addresses. */
13987 ret
= PC_BOUNDS_RANGES
;
13990 return PC_BOUNDS_NOT_PRESENT
;
13993 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
13995 return PC_BOUNDS_INVALID
;
13997 /* When using the GNU linker, .gnu.linkonce. sections are used to
13998 eliminate duplicate copies of functions and vtables and such.
13999 The linker will arbitrarily choose one and discard the others.
14000 The AT_*_pc values for such functions refer to local labels in
14001 these sections. If the section from that file was discarded, the
14002 labels are not in the output, so the relocs get a value of 0.
14003 If this is a discarded function, mark the pc bounds as invalid,
14004 so that GDB will ignore it. */
14005 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14006 return PC_BOUNDS_INVALID
;
14014 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14015 its low and high PC addresses. Do nothing if these addresses could not
14016 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14017 and HIGHPC to the high address if greater than HIGHPC. */
14020 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14021 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14022 struct dwarf2_cu
*cu
)
14024 CORE_ADDR low
, high
;
14025 struct die_info
*child
= die
->child
;
14027 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14029 *lowpc
= std::min (*lowpc
, low
);
14030 *highpc
= std::max (*highpc
, high
);
14033 /* If the language does not allow nested subprograms (either inside
14034 subprograms or lexical blocks), we're done. */
14035 if (cu
->language
!= language_ada
)
14038 /* Check all the children of the given DIE. If it contains nested
14039 subprograms, then check their pc bounds. Likewise, we need to
14040 check lexical blocks as well, as they may also contain subprogram
14042 while (child
&& child
->tag
)
14044 if (child
->tag
== DW_TAG_subprogram
14045 || child
->tag
== DW_TAG_lexical_block
)
14046 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14047 child
= child
->sibling
;
14051 /* Get the low and high pc's represented by the scope DIE, and store
14052 them in *LOWPC and *HIGHPC. If the correct values can't be
14053 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14056 get_scope_pc_bounds (struct die_info
*die
,
14057 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14058 struct dwarf2_cu
*cu
)
14060 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14061 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14062 CORE_ADDR current_low
, current_high
;
14064 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14065 >= PC_BOUNDS_RANGES
)
14067 best_low
= current_low
;
14068 best_high
= current_high
;
14072 struct die_info
*child
= die
->child
;
14074 while (child
&& child
->tag
)
14076 switch (child
->tag
) {
14077 case DW_TAG_subprogram
:
14078 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14080 case DW_TAG_namespace
:
14081 case DW_TAG_module
:
14082 /* FIXME: carlton/2004-01-16: Should we do this for
14083 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14084 that current GCC's always emit the DIEs corresponding
14085 to definitions of methods of classes as children of a
14086 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14087 the DIEs giving the declarations, which could be
14088 anywhere). But I don't see any reason why the
14089 standards says that they have to be there. */
14090 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14092 if (current_low
!= ((CORE_ADDR
) -1))
14094 best_low
= std::min (best_low
, current_low
);
14095 best_high
= std::max (best_high
, current_high
);
14103 child
= child
->sibling
;
14108 *highpc
= best_high
;
14111 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14115 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14116 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14118 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14119 struct gdbarch
*gdbarch
= objfile
->arch ();
14120 struct attribute
*attr
;
14121 struct attribute
*attr_high
;
14123 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14126 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14127 if (attr
!= nullptr)
14129 CORE_ADDR low
= attr
->value_as_address ();
14130 CORE_ADDR high
= attr_high
->value_as_address ();
14132 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14135 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14136 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14137 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14141 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14142 if (attr
!= nullptr)
14144 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14145 We take advantage of the fact that DW_AT_ranges does not appear
14146 in DW_TAG_compile_unit of DWO files. */
14147 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14149 /* The value of the DW_AT_ranges attribute is the offset of the
14150 address range list in the .debug_ranges section. */
14151 unsigned long offset
= (DW_UNSND (attr
)
14152 + (need_ranges_base
? cu
->ranges_base
: 0));
14154 std::vector
<blockrange
> blockvec
;
14155 dwarf2_ranges_process (offset
, cu
,
14156 [&] (CORE_ADDR start
, CORE_ADDR end
)
14160 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14161 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14162 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14163 blockvec
.emplace_back (start
, end
);
14166 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14170 /* Check whether the producer field indicates either of GCC < 4.6, or the
14171 Intel C/C++ compiler, and cache the result in CU. */
14174 check_producer (struct dwarf2_cu
*cu
)
14178 if (cu
->producer
== NULL
)
14180 /* For unknown compilers expect their behavior is DWARF version
14183 GCC started to support .debug_types sections by -gdwarf-4 since
14184 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14185 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14186 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14187 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14189 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14191 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14192 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14194 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14196 cu
->producer_is_icc
= true;
14197 cu
->producer_is_icc_lt_14
= major
< 14;
14199 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14200 cu
->producer_is_codewarrior
= true;
14203 /* For other non-GCC compilers, expect their behavior is DWARF version
14207 cu
->checked_producer
= true;
14210 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14211 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14212 during 4.6.0 experimental. */
14215 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14217 if (!cu
->checked_producer
)
14218 check_producer (cu
);
14220 return cu
->producer_is_gxx_lt_4_6
;
14224 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14225 with incorrect is_stmt attributes. */
14228 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14230 if (!cu
->checked_producer
)
14231 check_producer (cu
);
14233 return cu
->producer_is_codewarrior
;
14236 /* Return the default accessibility type if it is not overridden by
14237 DW_AT_accessibility. */
14239 static enum dwarf_access_attribute
14240 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14242 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14244 /* The default DWARF 2 accessibility for members is public, the default
14245 accessibility for inheritance is private. */
14247 if (die
->tag
!= DW_TAG_inheritance
)
14248 return DW_ACCESS_public
;
14250 return DW_ACCESS_private
;
14254 /* DWARF 3+ defines the default accessibility a different way. The same
14255 rules apply now for DW_TAG_inheritance as for the members and it only
14256 depends on the container kind. */
14258 if (die
->parent
->tag
== DW_TAG_class_type
)
14259 return DW_ACCESS_private
;
14261 return DW_ACCESS_public
;
14265 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14266 offset. If the attribute was not found return 0, otherwise return
14267 1. If it was found but could not properly be handled, set *OFFSET
14271 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14274 struct attribute
*attr
;
14276 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14281 /* Note that we do not check for a section offset first here.
14282 This is because DW_AT_data_member_location is new in DWARF 4,
14283 so if we see it, we can assume that a constant form is really
14284 a constant and not a section offset. */
14285 if (attr
->form_is_constant ())
14286 *offset
= attr
->constant_value (0);
14287 else if (attr
->form_is_section_offset ())
14288 dwarf2_complex_location_expr_complaint ();
14289 else if (attr
->form_is_block ())
14290 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14292 dwarf2_complex_location_expr_complaint ();
14300 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14303 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14304 struct field
*field
)
14306 struct attribute
*attr
;
14308 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14311 if (attr
->form_is_constant ())
14313 LONGEST offset
= attr
->constant_value (0);
14314 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14316 else if (attr
->form_is_section_offset ())
14317 dwarf2_complex_location_expr_complaint ();
14318 else if (attr
->form_is_block ())
14321 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14323 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14326 struct objfile
*objfile
14327 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14328 struct dwarf2_locexpr_baton
*dlbaton
14329 = XOBNEW (&objfile
->objfile_obstack
,
14330 struct dwarf2_locexpr_baton
);
14331 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14332 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14333 /* When using this baton, we want to compute the address
14334 of the field, not the value. This is why
14335 is_reference is set to false here. */
14336 dlbaton
->is_reference
= false;
14337 dlbaton
->per_cu
= cu
->per_cu
;
14339 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14343 dwarf2_complex_location_expr_complaint ();
14347 /* Add an aggregate field to the field list. */
14350 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14351 struct dwarf2_cu
*cu
)
14353 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14354 struct gdbarch
*gdbarch
= objfile
->arch ();
14355 struct nextfield
*new_field
;
14356 struct attribute
*attr
;
14358 const char *fieldname
= "";
14360 if (die
->tag
== DW_TAG_inheritance
)
14362 fip
->baseclasses
.emplace_back ();
14363 new_field
= &fip
->baseclasses
.back ();
14367 fip
->fields
.emplace_back ();
14368 new_field
= &fip
->fields
.back ();
14371 new_field
->offset
= die
->sect_off
;
14373 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14374 if (attr
!= nullptr)
14375 new_field
->accessibility
= DW_UNSND (attr
);
14377 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14378 if (new_field
->accessibility
!= DW_ACCESS_public
)
14379 fip
->non_public_fields
= 1;
14381 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14382 if (attr
!= nullptr)
14383 new_field
->virtuality
= DW_UNSND (attr
);
14385 new_field
->virtuality
= DW_VIRTUALITY_none
;
14387 fp
= &new_field
->field
;
14389 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14391 /* Data member other than a C++ static data member. */
14393 /* Get type of field. */
14394 fp
->type
= die_type (die
, cu
);
14396 SET_FIELD_BITPOS (*fp
, 0);
14398 /* Get bit size of field (zero if none). */
14399 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14400 if (attr
!= nullptr)
14402 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14406 FIELD_BITSIZE (*fp
) = 0;
14409 /* Get bit offset of field. */
14410 handle_data_member_location (die
, cu
, fp
);
14411 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14412 if (attr
!= nullptr)
14414 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14416 /* For big endian bits, the DW_AT_bit_offset gives the
14417 additional bit offset from the MSB of the containing
14418 anonymous object to the MSB of the field. We don't
14419 have to do anything special since we don't need to
14420 know the size of the anonymous object. */
14421 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14425 /* For little endian bits, compute the bit offset to the
14426 MSB of the anonymous object, subtract off the number of
14427 bits from the MSB of the field to the MSB of the
14428 object, and then subtract off the number of bits of
14429 the field itself. The result is the bit offset of
14430 the LSB of the field. */
14431 int anonymous_size
;
14432 int bit_offset
= DW_UNSND (attr
);
14434 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14435 if (attr
!= nullptr)
14437 /* The size of the anonymous object containing
14438 the bit field is explicit, so use the
14439 indicated size (in bytes). */
14440 anonymous_size
= DW_UNSND (attr
);
14444 /* The size of the anonymous object containing
14445 the bit field must be inferred from the type
14446 attribute of the data member containing the
14448 anonymous_size
= TYPE_LENGTH (fp
->type
);
14450 SET_FIELD_BITPOS (*fp
,
14451 (FIELD_BITPOS (*fp
)
14452 + anonymous_size
* bits_per_byte
14453 - bit_offset
- FIELD_BITSIZE (*fp
)));
14456 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14458 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14459 + attr
->constant_value (0)));
14461 /* Get name of field. */
14462 fieldname
= dwarf2_name (die
, cu
);
14463 if (fieldname
== NULL
)
14466 /* The name is already allocated along with this objfile, so we don't
14467 need to duplicate it for the type. */
14468 fp
->name
= fieldname
;
14470 /* Change accessibility for artificial fields (e.g. virtual table
14471 pointer or virtual base class pointer) to private. */
14472 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14474 FIELD_ARTIFICIAL (*fp
) = 1;
14475 new_field
->accessibility
= DW_ACCESS_private
;
14476 fip
->non_public_fields
= 1;
14479 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14481 /* C++ static member. */
14483 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14484 is a declaration, but all versions of G++ as of this writing
14485 (so through at least 3.2.1) incorrectly generate
14486 DW_TAG_variable tags. */
14488 const char *physname
;
14490 /* Get name of field. */
14491 fieldname
= dwarf2_name (die
, cu
);
14492 if (fieldname
== NULL
)
14495 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14497 /* Only create a symbol if this is an external value.
14498 new_symbol checks this and puts the value in the global symbol
14499 table, which we want. If it is not external, new_symbol
14500 will try to put the value in cu->list_in_scope which is wrong. */
14501 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14503 /* A static const member, not much different than an enum as far as
14504 we're concerned, except that we can support more types. */
14505 new_symbol (die
, NULL
, cu
);
14508 /* Get physical name. */
14509 physname
= dwarf2_physname (fieldname
, die
, cu
);
14511 /* The name is already allocated along with this objfile, so we don't
14512 need to duplicate it for the type. */
14513 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14514 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14515 FIELD_NAME (*fp
) = fieldname
;
14517 else if (die
->tag
== DW_TAG_inheritance
)
14519 /* C++ base class field. */
14520 handle_data_member_location (die
, cu
, fp
);
14521 FIELD_BITSIZE (*fp
) = 0;
14522 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14523 FIELD_NAME (*fp
) = fp
->type
->name ();
14526 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14529 /* Can the type given by DIE define another type? */
14532 type_can_define_types (const struct die_info
*die
)
14536 case DW_TAG_typedef
:
14537 case DW_TAG_class_type
:
14538 case DW_TAG_structure_type
:
14539 case DW_TAG_union_type
:
14540 case DW_TAG_enumeration_type
:
14548 /* Add a type definition defined in the scope of the FIP's class. */
14551 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14552 struct dwarf2_cu
*cu
)
14554 struct decl_field fp
;
14555 memset (&fp
, 0, sizeof (fp
));
14557 gdb_assert (type_can_define_types (die
));
14559 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14560 fp
.name
= dwarf2_name (die
, cu
);
14561 fp
.type
= read_type_die (die
, cu
);
14563 /* Save accessibility. */
14564 enum dwarf_access_attribute accessibility
;
14565 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14567 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14569 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14570 switch (accessibility
)
14572 case DW_ACCESS_public
:
14573 /* The assumed value if neither private nor protected. */
14575 case DW_ACCESS_private
:
14578 case DW_ACCESS_protected
:
14579 fp
.is_protected
= 1;
14582 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14585 if (die
->tag
== DW_TAG_typedef
)
14586 fip
->typedef_field_list
.push_back (fp
);
14588 fip
->nested_types_list
.push_back (fp
);
14591 /* A convenience typedef that's used when finding the discriminant
14592 field for a variant part. */
14593 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14596 /* Compute the discriminant range for a given variant. OBSTACK is
14597 where the results will be stored. VARIANT is the variant to
14598 process. IS_UNSIGNED indicates whether the discriminant is signed
14601 static const gdb::array_view
<discriminant_range
>
14602 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14605 std::vector
<discriminant_range
> ranges
;
14607 if (variant
.default_branch
)
14610 if (variant
.discr_list_data
== nullptr)
14612 discriminant_range r
14613 = {variant
.discriminant_value
, variant
.discriminant_value
};
14614 ranges
.push_back (r
);
14618 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14619 variant
.discr_list_data
->size
);
14620 while (!data
.empty ())
14622 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14624 complaint (_("invalid discriminant marker: %d"), data
[0]);
14627 bool is_range
= data
[0] == DW_DSC_range
;
14628 data
= data
.slice (1);
14630 ULONGEST low
, high
;
14631 unsigned int bytes_read
;
14635 complaint (_("DW_AT_discr_list missing low value"));
14639 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14641 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14643 data
= data
.slice (bytes_read
);
14649 complaint (_("DW_AT_discr_list missing high value"));
14653 high
= read_unsigned_leb128 (nullptr, data
.data (),
14656 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14658 data
= data
.slice (bytes_read
);
14663 ranges
.push_back ({ low
, high
});
14667 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14669 std::copy (ranges
.begin (), ranges
.end (), result
);
14670 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14673 static const gdb::array_view
<variant_part
> create_variant_parts
14674 (struct obstack
*obstack
,
14675 const offset_map_type
&offset_map
,
14676 struct field_info
*fi
,
14677 const std::vector
<variant_part_builder
> &variant_parts
);
14679 /* Fill in a "struct variant" for a given variant field. RESULT is
14680 the variant to fill in. OBSTACK is where any needed allocations
14681 will be done. OFFSET_MAP holds the mapping from section offsets to
14682 fields for the type. FI describes the fields of the type we're
14683 processing. FIELD is the variant field we're converting. */
14686 create_one_variant (variant
&result
, struct obstack
*obstack
,
14687 const offset_map_type
&offset_map
,
14688 struct field_info
*fi
, const variant_field
&field
)
14690 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14691 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14692 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14693 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14694 field
.variant_parts
);
14697 /* Fill in a "struct variant_part" for a given variant part. RESULT
14698 is the variant part to fill in. OBSTACK is where any needed
14699 allocations will be done. OFFSET_MAP holds the mapping from
14700 section offsets to fields for the type. FI describes the fields of
14701 the type we're processing. BUILDER is the variant part to be
14705 create_one_variant_part (variant_part
&result
,
14706 struct obstack
*obstack
,
14707 const offset_map_type
&offset_map
,
14708 struct field_info
*fi
,
14709 const variant_part_builder
&builder
)
14711 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14712 if (iter
== offset_map
.end ())
14714 result
.discriminant_index
= -1;
14715 /* Doesn't matter. */
14716 result
.is_unsigned
= false;
14720 result
.discriminant_index
= iter
->second
;
14722 = TYPE_UNSIGNED (FIELD_TYPE
14723 (fi
->fields
[result
.discriminant_index
].field
));
14726 size_t n
= builder
.variants
.size ();
14727 variant
*output
= new (obstack
) variant
[n
];
14728 for (size_t i
= 0; i
< n
; ++i
)
14729 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14730 builder
.variants
[i
]);
14732 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14735 /* Create a vector of variant parts that can be attached to a type.
14736 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14737 holds the mapping from section offsets to fields for the type. FI
14738 describes the fields of the type we're processing. VARIANT_PARTS
14739 is the vector to convert. */
14741 static const gdb::array_view
<variant_part
>
14742 create_variant_parts (struct obstack
*obstack
,
14743 const offset_map_type
&offset_map
,
14744 struct field_info
*fi
,
14745 const std::vector
<variant_part_builder
> &variant_parts
)
14747 if (variant_parts
.empty ())
14750 size_t n
= variant_parts
.size ();
14751 variant_part
*result
= new (obstack
) variant_part
[n
];
14752 for (size_t i
= 0; i
< n
; ++i
)
14753 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14756 return gdb::array_view
<variant_part
> (result
, n
);
14759 /* Compute the variant part vector for FIP, attaching it to TYPE when
14763 add_variant_property (struct field_info
*fip
, struct type
*type
,
14764 struct dwarf2_cu
*cu
)
14766 /* Map section offsets of fields to their field index. Note the
14767 field index here does not take the number of baseclasses into
14769 offset_map_type offset_map
;
14770 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14771 offset_map
[fip
->fields
[i
].offset
] = i
;
14773 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14774 gdb::array_view
<variant_part
> parts
14775 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14776 fip
->variant_parts
);
14778 struct dynamic_prop prop
;
14779 prop
.kind
= PROP_VARIANT_PARTS
;
14780 prop
.data
.variant_parts
14781 = ((gdb::array_view
<variant_part
> *)
14782 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14784 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14787 /* Create the vector of fields, and attach it to the type. */
14790 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14791 struct dwarf2_cu
*cu
)
14793 int nfields
= fip
->nfields ();
14795 /* Record the field count, allocate space for the array of fields,
14796 and create blank accessibility bitfields if necessary. */
14797 type
->set_num_fields (nfields
);
14799 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
14801 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14803 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14805 TYPE_FIELD_PRIVATE_BITS (type
) =
14806 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14807 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14809 TYPE_FIELD_PROTECTED_BITS (type
) =
14810 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14811 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14813 TYPE_FIELD_IGNORE_BITS (type
) =
14814 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14815 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14818 /* If the type has baseclasses, allocate and clear a bit vector for
14819 TYPE_FIELD_VIRTUAL_BITS. */
14820 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14822 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14823 unsigned char *pointer
;
14825 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14826 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14827 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14828 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14829 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14832 if (!fip
->variant_parts
.empty ())
14833 add_variant_property (fip
, type
, cu
);
14835 /* Copy the saved-up fields into the field vector. */
14836 for (int i
= 0; i
< nfields
; ++i
)
14838 struct nextfield
&field
14839 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14840 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14842 type
->field (i
) = field
.field
;
14843 switch (field
.accessibility
)
14845 case DW_ACCESS_private
:
14846 if (cu
->language
!= language_ada
)
14847 SET_TYPE_FIELD_PRIVATE (type
, i
);
14850 case DW_ACCESS_protected
:
14851 if (cu
->language
!= language_ada
)
14852 SET_TYPE_FIELD_PROTECTED (type
, i
);
14855 case DW_ACCESS_public
:
14859 /* Unknown accessibility. Complain and treat it as public. */
14861 complaint (_("unsupported accessibility %d"),
14862 field
.accessibility
);
14866 if (i
< fip
->baseclasses
.size ())
14868 switch (field
.virtuality
)
14870 case DW_VIRTUALITY_virtual
:
14871 case DW_VIRTUALITY_pure_virtual
:
14872 if (cu
->language
== language_ada
)
14873 error (_("unexpected virtuality in component of Ada type"));
14874 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14881 /* Return true if this member function is a constructor, false
14885 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14887 const char *fieldname
;
14888 const char *type_name
;
14891 if (die
->parent
== NULL
)
14894 if (die
->parent
->tag
!= DW_TAG_structure_type
14895 && die
->parent
->tag
!= DW_TAG_union_type
14896 && die
->parent
->tag
!= DW_TAG_class_type
)
14899 fieldname
= dwarf2_name (die
, cu
);
14900 type_name
= dwarf2_name (die
->parent
, cu
);
14901 if (fieldname
== NULL
|| type_name
== NULL
)
14904 len
= strlen (fieldname
);
14905 return (strncmp (fieldname
, type_name
, len
) == 0
14906 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14909 /* Check if the given VALUE is a recognized enum
14910 dwarf_defaulted_attribute constant according to DWARF5 spec,
14914 is_valid_DW_AT_defaulted (ULONGEST value
)
14918 case DW_DEFAULTED_no
:
14919 case DW_DEFAULTED_in_class
:
14920 case DW_DEFAULTED_out_of_class
:
14924 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14928 /* Add a member function to the proper fieldlist. */
14931 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14932 struct type
*type
, struct dwarf2_cu
*cu
)
14934 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14935 struct attribute
*attr
;
14937 struct fnfieldlist
*flp
= nullptr;
14938 struct fn_field
*fnp
;
14939 const char *fieldname
;
14940 struct type
*this_type
;
14941 enum dwarf_access_attribute accessibility
;
14943 if (cu
->language
== language_ada
)
14944 error (_("unexpected member function in Ada type"));
14946 /* Get name of member function. */
14947 fieldname
= dwarf2_name (die
, cu
);
14948 if (fieldname
== NULL
)
14951 /* Look up member function name in fieldlist. */
14952 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14954 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14956 flp
= &fip
->fnfieldlists
[i
];
14961 /* Create a new fnfieldlist if necessary. */
14962 if (flp
== nullptr)
14964 fip
->fnfieldlists
.emplace_back ();
14965 flp
= &fip
->fnfieldlists
.back ();
14966 flp
->name
= fieldname
;
14967 i
= fip
->fnfieldlists
.size () - 1;
14970 /* Create a new member function field and add it to the vector of
14972 flp
->fnfields
.emplace_back ();
14973 fnp
= &flp
->fnfields
.back ();
14975 /* Delay processing of the physname until later. */
14976 if (cu
->language
== language_cplus
)
14977 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14981 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14982 fnp
->physname
= physname
? physname
: "";
14985 fnp
->type
= alloc_type (objfile
);
14986 this_type
= read_type_die (die
, cu
);
14987 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
14989 int nparams
= this_type
->num_fields ();
14991 /* TYPE is the domain of this method, and THIS_TYPE is the type
14992 of the method itself (TYPE_CODE_METHOD). */
14993 smash_to_method_type (fnp
->type
, type
,
14994 TYPE_TARGET_TYPE (this_type
),
14995 this_type
->fields (),
14996 this_type
->num_fields (),
14997 TYPE_VARARGS (this_type
));
14999 /* Handle static member functions.
15000 Dwarf2 has no clean way to discern C++ static and non-static
15001 member functions. G++ helps GDB by marking the first
15002 parameter for non-static member functions (which is the this
15003 pointer) as artificial. We obtain this information from
15004 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15005 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15006 fnp
->voffset
= VOFFSET_STATIC
;
15009 complaint (_("member function type missing for '%s'"),
15010 dwarf2_full_name (fieldname
, die
, cu
));
15012 /* Get fcontext from DW_AT_containing_type if present. */
15013 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15014 fnp
->fcontext
= die_containing_type (die
, cu
);
15016 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15017 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15019 /* Get accessibility. */
15020 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15021 if (attr
!= nullptr)
15022 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15024 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15025 switch (accessibility
)
15027 case DW_ACCESS_private
:
15028 fnp
->is_private
= 1;
15030 case DW_ACCESS_protected
:
15031 fnp
->is_protected
= 1;
15035 /* Check for artificial methods. */
15036 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15037 if (attr
&& DW_UNSND (attr
) != 0)
15038 fnp
->is_artificial
= 1;
15040 /* Check for defaulted methods. */
15041 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15042 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15043 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15045 /* Check for deleted methods. */
15046 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15047 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15048 fnp
->is_deleted
= 1;
15050 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15052 /* Get index in virtual function table if it is a virtual member
15053 function. For older versions of GCC, this is an offset in the
15054 appropriate virtual table, as specified by DW_AT_containing_type.
15055 For everyone else, it is an expression to be evaluated relative
15056 to the object address. */
15058 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15059 if (attr
!= nullptr)
15061 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15063 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15065 /* Old-style GCC. */
15066 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15068 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15069 || (DW_BLOCK (attr
)->size
> 1
15070 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15071 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15073 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15074 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15075 dwarf2_complex_location_expr_complaint ();
15077 fnp
->voffset
/= cu
->header
.addr_size
;
15081 dwarf2_complex_location_expr_complaint ();
15083 if (!fnp
->fcontext
)
15085 /* If there is no `this' field and no DW_AT_containing_type,
15086 we cannot actually find a base class context for the
15088 if (this_type
->num_fields () == 0
15089 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15091 complaint (_("cannot determine context for virtual member "
15092 "function \"%s\" (offset %s)"),
15093 fieldname
, sect_offset_str (die
->sect_off
));
15098 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15102 else if (attr
->form_is_section_offset ())
15104 dwarf2_complex_location_expr_complaint ();
15108 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15114 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15115 if (attr
&& DW_UNSND (attr
))
15117 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15118 complaint (_("Member function \"%s\" (offset %s) is virtual "
15119 "but the vtable offset is not specified"),
15120 fieldname
, sect_offset_str (die
->sect_off
));
15121 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15122 TYPE_CPLUS_DYNAMIC (type
) = 1;
15127 /* Create the vector of member function fields, and attach it to the type. */
15130 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15131 struct dwarf2_cu
*cu
)
15133 if (cu
->language
== language_ada
)
15134 error (_("unexpected member functions in Ada type"));
15136 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15137 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15139 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15141 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15143 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15144 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15146 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15147 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15148 fn_flp
->fn_fields
= (struct fn_field
*)
15149 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15151 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15152 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15155 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15158 /* Returns non-zero if NAME is the name of a vtable member in CU's
15159 language, zero otherwise. */
15161 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15163 static const char vptr
[] = "_vptr";
15165 /* Look for the C++ form of the vtable. */
15166 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15172 /* GCC outputs unnamed structures that are really pointers to member
15173 functions, with the ABI-specified layout. If TYPE describes
15174 such a structure, smash it into a member function type.
15176 GCC shouldn't do this; it should just output pointer to member DIEs.
15177 This is GCC PR debug/28767. */
15180 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15182 struct type
*pfn_type
, *self_type
, *new_type
;
15184 /* Check for a structure with no name and two children. */
15185 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15188 /* Check for __pfn and __delta members. */
15189 if (TYPE_FIELD_NAME (type
, 0) == NULL
15190 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15191 || TYPE_FIELD_NAME (type
, 1) == NULL
15192 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15195 /* Find the type of the method. */
15196 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15197 if (pfn_type
== NULL
15198 || pfn_type
->code () != TYPE_CODE_PTR
15199 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15202 /* Look for the "this" argument. */
15203 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15204 if (pfn_type
->num_fields () == 0
15205 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15206 || TYPE_FIELD_TYPE (pfn_type
, 0)->code () != TYPE_CODE_PTR
)
15209 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15210 new_type
= alloc_type (objfile
);
15211 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15212 pfn_type
->fields (), pfn_type
->num_fields (),
15213 TYPE_VARARGS (pfn_type
));
15214 smash_to_methodptr_type (type
, new_type
);
15217 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15218 appropriate error checking and issuing complaints if there is a
15222 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15224 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15226 if (attr
== nullptr)
15229 if (!attr
->form_is_constant ())
15231 complaint (_("DW_AT_alignment must have constant form"
15232 " - DIE at %s [in module %s]"),
15233 sect_offset_str (die
->sect_off
),
15234 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15239 if (attr
->form
== DW_FORM_sdata
)
15241 LONGEST val
= DW_SND (attr
);
15244 complaint (_("DW_AT_alignment value must not be negative"
15245 " - DIE at %s [in module %s]"),
15246 sect_offset_str (die
->sect_off
),
15247 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15253 align
= DW_UNSND (attr
);
15257 complaint (_("DW_AT_alignment value must not be zero"
15258 " - DIE at %s [in module %s]"),
15259 sect_offset_str (die
->sect_off
),
15260 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15263 if ((align
& (align
- 1)) != 0)
15265 complaint (_("DW_AT_alignment value must be a power of 2"
15266 " - DIE at %s [in module %s]"),
15267 sect_offset_str (die
->sect_off
),
15268 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15275 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15276 the alignment for TYPE. */
15279 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15282 if (!set_type_align (type
, get_alignment (cu
, die
)))
15283 complaint (_("DW_AT_alignment value too large"
15284 " - DIE at %s [in module %s]"),
15285 sect_offset_str (die
->sect_off
),
15286 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15289 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15290 constant for a type, according to DWARF5 spec, Table 5.5. */
15293 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15298 case DW_CC_pass_by_reference
:
15299 case DW_CC_pass_by_value
:
15303 complaint (_("unrecognized DW_AT_calling_convention value "
15304 "(%s) for a type"), pulongest (value
));
15309 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15310 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15311 also according to GNU-specific values (see include/dwarf2.h). */
15314 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15319 case DW_CC_program
:
15323 case DW_CC_GNU_renesas_sh
:
15324 case DW_CC_GNU_borland_fastcall_i386
:
15325 case DW_CC_GDB_IBM_OpenCL
:
15329 complaint (_("unrecognized DW_AT_calling_convention value "
15330 "(%s) for a subroutine"), pulongest (value
));
15335 /* Called when we find the DIE that starts a structure or union scope
15336 (definition) to create a type for the structure or union. Fill in
15337 the type's name and general properties; the members will not be
15338 processed until process_structure_scope. A symbol table entry for
15339 the type will also not be done until process_structure_scope (assuming
15340 the type has a name).
15342 NOTE: we need to call these functions regardless of whether or not the
15343 DIE has a DW_AT_name attribute, since it might be an anonymous
15344 structure or union. This gets the type entered into our set of
15345 user defined types. */
15347 static struct type
*
15348 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15350 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15352 struct attribute
*attr
;
15355 /* If the definition of this type lives in .debug_types, read that type.
15356 Don't follow DW_AT_specification though, that will take us back up
15357 the chain and we want to go down. */
15358 attr
= die
->attr (DW_AT_signature
);
15359 if (attr
!= nullptr)
15361 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15363 /* The type's CU may not be the same as CU.
15364 Ensure TYPE is recorded with CU in die_type_hash. */
15365 return set_die_type (die
, type
, cu
);
15368 type
= alloc_type (objfile
);
15369 INIT_CPLUS_SPECIFIC (type
);
15371 name
= dwarf2_name (die
, cu
);
15374 if (cu
->language
== language_cplus
15375 || cu
->language
== language_d
15376 || cu
->language
== language_rust
)
15378 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15380 /* dwarf2_full_name might have already finished building the DIE's
15381 type. If so, there is no need to continue. */
15382 if (get_die_type (die
, cu
) != NULL
)
15383 return get_die_type (die
, cu
);
15385 type
->set_name (full_name
);
15389 /* The name is already allocated along with this objfile, so
15390 we don't need to duplicate it for the type. */
15391 type
->set_name (name
);
15395 if (die
->tag
== DW_TAG_structure_type
)
15397 type
->set_code (TYPE_CODE_STRUCT
);
15399 else if (die
->tag
== DW_TAG_union_type
)
15401 type
->set_code (TYPE_CODE_UNION
);
15405 type
->set_code (TYPE_CODE_STRUCT
);
15408 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15409 TYPE_DECLARED_CLASS (type
) = 1;
15411 /* Store the calling convention in the type if it's available in
15412 the die. Otherwise the calling convention remains set to
15413 the default value DW_CC_normal. */
15414 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15415 if (attr
!= nullptr
15416 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15418 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15419 TYPE_CPLUS_CALLING_CONVENTION (type
)
15420 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15423 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15424 if (attr
!= nullptr)
15426 if (attr
->form_is_constant ())
15427 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15430 struct dynamic_prop prop
;
15431 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15432 cu
->per_cu
->addr_type ()))
15433 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15434 TYPE_LENGTH (type
) = 0;
15439 TYPE_LENGTH (type
) = 0;
15442 maybe_set_alignment (cu
, die
, type
);
15444 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15446 /* ICC<14 does not output the required DW_AT_declaration on
15447 incomplete types, but gives them a size of zero. */
15448 TYPE_STUB (type
) = 1;
15451 TYPE_STUB_SUPPORTED (type
) = 1;
15453 if (die_is_declaration (die
, cu
))
15454 TYPE_STUB (type
) = 1;
15455 else if (attr
== NULL
&& die
->child
== NULL
15456 && producer_is_realview (cu
->producer
))
15457 /* RealView does not output the required DW_AT_declaration
15458 on incomplete types. */
15459 TYPE_STUB (type
) = 1;
15461 /* We need to add the type field to the die immediately so we don't
15462 infinitely recurse when dealing with pointers to the structure
15463 type within the structure itself. */
15464 set_die_type (die
, type
, cu
);
15466 /* set_die_type should be already done. */
15467 set_descriptive_type (type
, die
, cu
);
15472 static void handle_struct_member_die
15473 (struct die_info
*child_die
,
15475 struct field_info
*fi
,
15476 std::vector
<struct symbol
*> *template_args
,
15477 struct dwarf2_cu
*cu
);
15479 /* A helper for handle_struct_member_die that handles
15480 DW_TAG_variant_part. */
15483 handle_variant_part (struct die_info
*die
, struct type
*type
,
15484 struct field_info
*fi
,
15485 std::vector
<struct symbol
*> *template_args
,
15486 struct dwarf2_cu
*cu
)
15488 variant_part_builder
*new_part
;
15489 if (fi
->current_variant_part
== nullptr)
15491 fi
->variant_parts
.emplace_back ();
15492 new_part
= &fi
->variant_parts
.back ();
15494 else if (!fi
->current_variant_part
->processing_variant
)
15496 complaint (_("nested DW_TAG_variant_part seen "
15497 "- DIE at %s [in module %s]"),
15498 sect_offset_str (die
->sect_off
),
15499 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15504 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15505 current
.variant_parts
.emplace_back ();
15506 new_part
= ¤t
.variant_parts
.back ();
15509 /* When we recurse, we want callees to add to this new variant
15511 scoped_restore save_current_variant_part
15512 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15514 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15517 /* It's a univariant form, an extension we support. */
15519 else if (discr
->form_is_ref ())
15521 struct dwarf2_cu
*target_cu
= cu
;
15522 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15524 new_part
->discriminant_offset
= target_die
->sect_off
;
15528 complaint (_("DW_AT_discr does not have DIE reference form"
15529 " - DIE at %s [in module %s]"),
15530 sect_offset_str (die
->sect_off
),
15531 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15534 for (die_info
*child_die
= die
->child
;
15536 child_die
= child_die
->sibling
)
15537 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15540 /* A helper for handle_struct_member_die that handles
15544 handle_variant (struct die_info
*die
, struct type
*type
,
15545 struct field_info
*fi
,
15546 std::vector
<struct symbol
*> *template_args
,
15547 struct dwarf2_cu
*cu
)
15549 if (fi
->current_variant_part
== nullptr)
15551 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15552 "- DIE at %s [in module %s]"),
15553 sect_offset_str (die
->sect_off
),
15554 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15557 if (fi
->current_variant_part
->processing_variant
)
15559 complaint (_("nested DW_TAG_variant seen "
15560 "- DIE at %s [in module %s]"),
15561 sect_offset_str (die
->sect_off
),
15562 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15566 scoped_restore save_processing_variant
15567 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15570 fi
->current_variant_part
->variants
.emplace_back ();
15571 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15572 variant
.first_field
= fi
->fields
.size ();
15574 /* In a variant we want to get the discriminant and also add a
15575 field for our sole member child. */
15576 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15577 if (discr
== nullptr)
15579 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15580 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15581 variant
.default_branch
= true;
15583 variant
.discr_list_data
= DW_BLOCK (discr
);
15586 variant
.discriminant_value
= DW_UNSND (discr
);
15588 for (die_info
*variant_child
= die
->child
;
15589 variant_child
!= NULL
;
15590 variant_child
= variant_child
->sibling
)
15591 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15593 variant
.last_field
= fi
->fields
.size ();
15596 /* A helper for process_structure_scope that handles a single member
15600 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15601 struct field_info
*fi
,
15602 std::vector
<struct symbol
*> *template_args
,
15603 struct dwarf2_cu
*cu
)
15605 if (child_die
->tag
== DW_TAG_member
15606 || child_die
->tag
== DW_TAG_variable
)
15608 /* NOTE: carlton/2002-11-05: A C++ static data member
15609 should be a DW_TAG_member that is a declaration, but
15610 all versions of G++ as of this writing (so through at
15611 least 3.2.1) incorrectly generate DW_TAG_variable
15612 tags for them instead. */
15613 dwarf2_add_field (fi
, child_die
, cu
);
15615 else if (child_die
->tag
== DW_TAG_subprogram
)
15617 /* Rust doesn't have member functions in the C++ sense.
15618 However, it does emit ordinary functions as children
15619 of a struct DIE. */
15620 if (cu
->language
== language_rust
)
15621 read_func_scope (child_die
, cu
);
15624 /* C++ member function. */
15625 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15628 else if (child_die
->tag
== DW_TAG_inheritance
)
15630 /* C++ base class field. */
15631 dwarf2_add_field (fi
, child_die
, cu
);
15633 else if (type_can_define_types (child_die
))
15634 dwarf2_add_type_defn (fi
, child_die
, cu
);
15635 else if (child_die
->tag
== DW_TAG_template_type_param
15636 || child_die
->tag
== DW_TAG_template_value_param
)
15638 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15641 template_args
->push_back (arg
);
15643 else if (child_die
->tag
== DW_TAG_variant_part
)
15644 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15645 else if (child_die
->tag
== DW_TAG_variant
)
15646 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15649 /* Finish creating a structure or union type, including filling in
15650 its members and creating a symbol for it. */
15653 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15655 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15656 struct die_info
*child_die
;
15659 type
= get_die_type (die
, cu
);
15661 type
= read_structure_type (die
, cu
);
15663 bool has_template_parameters
= false;
15664 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15666 struct field_info fi
;
15667 std::vector
<struct symbol
*> template_args
;
15669 child_die
= die
->child
;
15671 while (child_die
&& child_die
->tag
)
15673 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15674 child_die
= child_die
->sibling
;
15677 /* Attach template arguments to type. */
15678 if (!template_args
.empty ())
15680 has_template_parameters
= true;
15681 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15682 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15683 TYPE_TEMPLATE_ARGUMENTS (type
)
15684 = XOBNEWVEC (&objfile
->objfile_obstack
,
15686 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15687 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15688 template_args
.data (),
15689 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15690 * sizeof (struct symbol
*)));
15693 /* Attach fields and member functions to the type. */
15694 if (fi
.nfields () > 0)
15695 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15696 if (!fi
.fnfieldlists
.empty ())
15698 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15700 /* Get the type which refers to the base class (possibly this
15701 class itself) which contains the vtable pointer for the current
15702 class from the DW_AT_containing_type attribute. This use of
15703 DW_AT_containing_type is a GNU extension. */
15705 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15707 struct type
*t
= die_containing_type (die
, cu
);
15709 set_type_vptr_basetype (type
, t
);
15714 /* Our own class provides vtbl ptr. */
15715 for (i
= t
->num_fields () - 1;
15716 i
>= TYPE_N_BASECLASSES (t
);
15719 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15721 if (is_vtable_name (fieldname
, cu
))
15723 set_type_vptr_fieldno (type
, i
);
15728 /* Complain if virtual function table field not found. */
15729 if (i
< TYPE_N_BASECLASSES (t
))
15730 complaint (_("virtual function table pointer "
15731 "not found when defining class '%s'"),
15732 type
->name () ? type
->name () : "");
15736 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15739 else if (cu
->producer
15740 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15742 /* The IBM XLC compiler does not provide direct indication
15743 of the containing type, but the vtable pointer is
15744 always named __vfp. */
15748 for (i
= type
->num_fields () - 1;
15749 i
>= TYPE_N_BASECLASSES (type
);
15752 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15754 set_type_vptr_fieldno (type
, i
);
15755 set_type_vptr_basetype (type
, type
);
15762 /* Copy fi.typedef_field_list linked list elements content into the
15763 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15764 if (!fi
.typedef_field_list
.empty ())
15766 int count
= fi
.typedef_field_list
.size ();
15768 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15769 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15770 = ((struct decl_field
*)
15772 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15773 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15775 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15776 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15779 /* Copy fi.nested_types_list linked list elements content into the
15780 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15781 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15783 int count
= fi
.nested_types_list
.size ();
15785 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15786 TYPE_NESTED_TYPES_ARRAY (type
)
15787 = ((struct decl_field
*)
15788 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15789 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15791 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15792 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15796 quirk_gcc_member_function_pointer (type
, objfile
);
15797 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15798 cu
->rust_unions
.push_back (type
);
15800 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15801 snapshots) has been known to create a die giving a declaration
15802 for a class that has, as a child, a die giving a definition for a
15803 nested class. So we have to process our children even if the
15804 current die is a declaration. Normally, of course, a declaration
15805 won't have any children at all. */
15807 child_die
= die
->child
;
15809 while (child_die
!= NULL
&& child_die
->tag
)
15811 if (child_die
->tag
== DW_TAG_member
15812 || child_die
->tag
== DW_TAG_variable
15813 || child_die
->tag
== DW_TAG_inheritance
15814 || child_die
->tag
== DW_TAG_template_value_param
15815 || child_die
->tag
== DW_TAG_template_type_param
)
15820 process_die (child_die
, cu
);
15822 child_die
= child_die
->sibling
;
15825 /* Do not consider external references. According to the DWARF standard,
15826 these DIEs are identified by the fact that they have no byte_size
15827 attribute, and a declaration attribute. */
15828 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15829 || !die_is_declaration (die
, cu
)
15830 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15832 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15834 if (has_template_parameters
)
15836 struct symtab
*symtab
;
15837 if (sym
!= nullptr)
15838 symtab
= symbol_symtab (sym
);
15839 else if (cu
->line_header
!= nullptr)
15841 /* Any related symtab will do. */
15843 = cu
->line_header
->file_names ()[0].symtab
;
15848 complaint (_("could not find suitable "
15849 "symtab for template parameter"
15850 " - DIE at %s [in module %s]"),
15851 sect_offset_str (die
->sect_off
),
15852 objfile_name (objfile
));
15855 if (symtab
!= nullptr)
15857 /* Make sure that the symtab is set on the new symbols.
15858 Even though they don't appear in this symtab directly,
15859 other parts of gdb assume that symbols do, and this is
15860 reasonably true. */
15861 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15862 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15868 /* Assuming DIE is an enumeration type, and TYPE is its associated
15869 type, update TYPE using some information only available in DIE's
15870 children. In particular, the fields are computed. */
15873 update_enumeration_type_from_children (struct die_info
*die
,
15875 struct dwarf2_cu
*cu
)
15877 struct die_info
*child_die
;
15878 int unsigned_enum
= 1;
15881 auto_obstack obstack
;
15882 std::vector
<struct field
> fields
;
15884 for (child_die
= die
->child
;
15885 child_die
!= NULL
&& child_die
->tag
;
15886 child_die
= child_die
->sibling
)
15888 struct attribute
*attr
;
15890 const gdb_byte
*bytes
;
15891 struct dwarf2_locexpr_baton
*baton
;
15894 if (child_die
->tag
!= DW_TAG_enumerator
)
15897 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15901 name
= dwarf2_name (child_die
, cu
);
15903 name
= "<anonymous enumerator>";
15905 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15906 &value
, &bytes
, &baton
);
15914 if (count_one_bits_ll (value
) >= 2)
15918 fields
.emplace_back ();
15919 struct field
&field
= fields
.back ();
15920 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
15921 SET_FIELD_ENUMVAL (field
, value
);
15924 if (!fields
.empty ())
15926 type
->set_num_fields (fields
.size ());
15929 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
15930 memcpy (type
->fields (), fields
.data (),
15931 sizeof (struct field
) * fields
.size ());
15935 TYPE_UNSIGNED (type
) = 1;
15937 TYPE_FLAG_ENUM (type
) = 1;
15940 /* Given a DW_AT_enumeration_type die, set its type. We do not
15941 complete the type's fields yet, or create any symbols. */
15943 static struct type
*
15944 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15946 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15948 struct attribute
*attr
;
15951 /* If the definition of this type lives in .debug_types, read that type.
15952 Don't follow DW_AT_specification though, that will take us back up
15953 the chain and we want to go down. */
15954 attr
= die
->attr (DW_AT_signature
);
15955 if (attr
!= nullptr)
15957 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15959 /* The type's CU may not be the same as CU.
15960 Ensure TYPE is recorded with CU in die_type_hash. */
15961 return set_die_type (die
, type
, cu
);
15964 type
= alloc_type (objfile
);
15966 type
->set_code (TYPE_CODE_ENUM
);
15967 name
= dwarf2_full_name (NULL
, die
, cu
);
15969 type
->set_name (name
);
15971 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15974 struct type
*underlying_type
= die_type (die
, cu
);
15976 TYPE_TARGET_TYPE (type
) = underlying_type
;
15979 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15980 if (attr
!= nullptr)
15982 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15986 TYPE_LENGTH (type
) = 0;
15989 maybe_set_alignment (cu
, die
, type
);
15991 /* The enumeration DIE can be incomplete. In Ada, any type can be
15992 declared as private in the package spec, and then defined only
15993 inside the package body. Such types are known as Taft Amendment
15994 Types. When another package uses such a type, an incomplete DIE
15995 may be generated by the compiler. */
15996 if (die_is_declaration (die
, cu
))
15997 TYPE_STUB (type
) = 1;
15999 /* If this type has an underlying type that is not a stub, then we
16000 may use its attributes. We always use the "unsigned" attribute
16001 in this situation, because ordinarily we guess whether the type
16002 is unsigned -- but the guess can be wrong and the underlying type
16003 can tell us the reality. However, we defer to a local size
16004 attribute if one exists, because this lets the compiler override
16005 the underlying type if needed. */
16006 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16008 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16009 underlying_type
= check_typedef (underlying_type
);
16010 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
16011 if (TYPE_LENGTH (type
) == 0)
16012 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16013 if (TYPE_RAW_ALIGN (type
) == 0
16014 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16015 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16018 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16020 set_die_type (die
, type
, cu
);
16022 /* Finish the creation of this type by using the enum's children.
16023 Note that, as usual, this must come after set_die_type to avoid
16024 infinite recursion when trying to compute the names of the
16026 update_enumeration_type_from_children (die
, type
, cu
);
16031 /* Given a pointer to a die which begins an enumeration, process all
16032 the dies that define the members of the enumeration, and create the
16033 symbol for the enumeration type.
16035 NOTE: We reverse the order of the element list. */
16038 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16040 struct type
*this_type
;
16042 this_type
= get_die_type (die
, cu
);
16043 if (this_type
== NULL
)
16044 this_type
= read_enumeration_type (die
, cu
);
16046 if (die
->child
!= NULL
)
16048 struct die_info
*child_die
;
16051 child_die
= die
->child
;
16052 while (child_die
&& child_die
->tag
)
16054 if (child_die
->tag
!= DW_TAG_enumerator
)
16056 process_die (child_die
, cu
);
16060 name
= dwarf2_name (child_die
, cu
);
16062 new_symbol (child_die
, this_type
, cu
);
16065 child_die
= child_die
->sibling
;
16069 /* If we are reading an enum from a .debug_types unit, and the enum
16070 is a declaration, and the enum is not the signatured type in the
16071 unit, then we do not want to add a symbol for it. Adding a
16072 symbol would in some cases obscure the true definition of the
16073 enum, giving users an incomplete type when the definition is
16074 actually available. Note that we do not want to do this for all
16075 enums which are just declarations, because C++0x allows forward
16076 enum declarations. */
16077 if (cu
->per_cu
->is_debug_types
16078 && die_is_declaration (die
, cu
))
16080 struct signatured_type
*sig_type
;
16082 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16083 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16084 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16088 new_symbol (die
, this_type
, cu
);
16091 /* Extract all information from a DW_TAG_array_type DIE and put it in
16092 the DIE's type field. For now, this only handles one dimensional
16095 static struct type
*
16096 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16098 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16099 struct die_info
*child_die
;
16101 struct type
*element_type
, *range_type
, *index_type
;
16102 struct attribute
*attr
;
16104 struct dynamic_prop
*byte_stride_prop
= NULL
;
16105 unsigned int bit_stride
= 0;
16107 element_type
= die_type (die
, cu
);
16109 /* The die_type call above may have already set the type for this DIE. */
16110 type
= get_die_type (die
, cu
);
16114 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16118 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16121 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16122 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16126 complaint (_("unable to read array DW_AT_byte_stride "
16127 " - DIE at %s [in module %s]"),
16128 sect_offset_str (die
->sect_off
),
16129 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16130 /* Ignore this attribute. We will likely not be able to print
16131 arrays of this type correctly, but there is little we can do
16132 to help if we cannot read the attribute's value. */
16133 byte_stride_prop
= NULL
;
16137 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16139 bit_stride
= DW_UNSND (attr
);
16141 /* Irix 6.2 native cc creates array types without children for
16142 arrays with unspecified length. */
16143 if (die
->child
== NULL
)
16145 index_type
= objfile_type (objfile
)->builtin_int
;
16146 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16147 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16148 byte_stride_prop
, bit_stride
);
16149 return set_die_type (die
, type
, cu
);
16152 std::vector
<struct type
*> range_types
;
16153 child_die
= die
->child
;
16154 while (child_die
&& child_die
->tag
)
16156 if (child_die
->tag
== DW_TAG_subrange_type
)
16158 struct type
*child_type
= read_type_die (child_die
, cu
);
16160 if (child_type
!= NULL
)
16162 /* The range type was succesfully read. Save it for the
16163 array type creation. */
16164 range_types
.push_back (child_type
);
16167 child_die
= child_die
->sibling
;
16170 /* Dwarf2 dimensions are output from left to right, create the
16171 necessary array types in backwards order. */
16173 type
= element_type
;
16175 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16179 while (i
< range_types
.size ())
16180 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16181 byte_stride_prop
, bit_stride
);
16185 size_t ndim
= range_types
.size ();
16187 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16188 byte_stride_prop
, bit_stride
);
16191 /* Understand Dwarf2 support for vector types (like they occur on
16192 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16193 array type. This is not part of the Dwarf2/3 standard yet, but a
16194 custom vendor extension. The main difference between a regular
16195 array and the vector variant is that vectors are passed by value
16197 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16198 if (attr
!= nullptr)
16199 make_vector_type (type
);
16201 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16202 implementation may choose to implement triple vectors using this
16204 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16205 if (attr
!= nullptr)
16207 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16208 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16210 complaint (_("DW_AT_byte_size for array type smaller "
16211 "than the total size of elements"));
16214 name
= dwarf2_name (die
, cu
);
16216 type
->set_name (name
);
16218 maybe_set_alignment (cu
, die
, type
);
16220 /* Install the type in the die. */
16221 set_die_type (die
, type
, cu
);
16223 /* set_die_type should be already done. */
16224 set_descriptive_type (type
, die
, cu
);
16229 static enum dwarf_array_dim_ordering
16230 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16232 struct attribute
*attr
;
16234 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16236 if (attr
!= nullptr)
16237 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16239 /* GNU F77 is a special case, as at 08/2004 array type info is the
16240 opposite order to the dwarf2 specification, but data is still
16241 laid out as per normal fortran.
16243 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16244 version checking. */
16246 if (cu
->language
== language_fortran
16247 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16249 return DW_ORD_row_major
;
16252 switch (cu
->language_defn
->la_array_ordering
)
16254 case array_column_major
:
16255 return DW_ORD_col_major
;
16256 case array_row_major
:
16258 return DW_ORD_row_major
;
16262 /* Extract all information from a DW_TAG_set_type DIE and put it in
16263 the DIE's type field. */
16265 static struct type
*
16266 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16268 struct type
*domain_type
, *set_type
;
16269 struct attribute
*attr
;
16271 domain_type
= die_type (die
, cu
);
16273 /* The die_type call above may have already set the type for this DIE. */
16274 set_type
= get_die_type (die
, cu
);
16278 set_type
= create_set_type (NULL
, domain_type
);
16280 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16281 if (attr
!= nullptr)
16282 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16284 maybe_set_alignment (cu
, die
, set_type
);
16286 return set_die_type (die
, set_type
, cu
);
16289 /* A helper for read_common_block that creates a locexpr baton.
16290 SYM is the symbol which we are marking as computed.
16291 COMMON_DIE is the DIE for the common block.
16292 COMMON_LOC is the location expression attribute for the common
16294 MEMBER_LOC is the location expression attribute for the particular
16295 member of the common block that we are processing.
16296 CU is the CU from which the above come. */
16299 mark_common_block_symbol_computed (struct symbol
*sym
,
16300 struct die_info
*common_die
,
16301 struct attribute
*common_loc
,
16302 struct attribute
*member_loc
,
16303 struct dwarf2_cu
*cu
)
16305 struct dwarf2_per_objfile
*dwarf2_per_objfile
16306 = cu
->per_cu
->dwarf2_per_objfile
;
16307 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16308 struct dwarf2_locexpr_baton
*baton
;
16310 unsigned int cu_off
;
16311 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16312 LONGEST offset
= 0;
16314 gdb_assert (common_loc
&& member_loc
);
16315 gdb_assert (common_loc
->form_is_block ());
16316 gdb_assert (member_loc
->form_is_block ()
16317 || member_loc
->form_is_constant ());
16319 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16320 baton
->per_cu
= cu
->per_cu
;
16321 gdb_assert (baton
->per_cu
);
16323 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16325 if (member_loc
->form_is_constant ())
16327 offset
= member_loc
->constant_value (0);
16328 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16331 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16333 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16336 *ptr
++ = DW_OP_call4
;
16337 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16338 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16341 if (member_loc
->form_is_constant ())
16343 *ptr
++ = DW_OP_addr
;
16344 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16345 ptr
+= cu
->header
.addr_size
;
16349 /* We have to copy the data here, because DW_OP_call4 will only
16350 use a DW_AT_location attribute. */
16351 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16352 ptr
+= DW_BLOCK (member_loc
)->size
;
16355 *ptr
++ = DW_OP_plus
;
16356 gdb_assert (ptr
- baton
->data
== baton
->size
);
16358 SYMBOL_LOCATION_BATON (sym
) = baton
;
16359 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16362 /* Create appropriate locally-scoped variables for all the
16363 DW_TAG_common_block entries. Also create a struct common_block
16364 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16365 is used to separate the common blocks name namespace from regular
16369 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16371 struct attribute
*attr
;
16373 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16374 if (attr
!= nullptr)
16376 /* Support the .debug_loc offsets. */
16377 if (attr
->form_is_block ())
16381 else if (attr
->form_is_section_offset ())
16383 dwarf2_complex_location_expr_complaint ();
16388 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16389 "common block member");
16394 if (die
->child
!= NULL
)
16396 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16397 struct die_info
*child_die
;
16398 size_t n_entries
= 0, size
;
16399 struct common_block
*common_block
;
16400 struct symbol
*sym
;
16402 for (child_die
= die
->child
;
16403 child_die
&& child_die
->tag
;
16404 child_die
= child_die
->sibling
)
16407 size
= (sizeof (struct common_block
)
16408 + (n_entries
- 1) * sizeof (struct symbol
*));
16410 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16412 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16413 common_block
->n_entries
= 0;
16415 for (child_die
= die
->child
;
16416 child_die
&& child_die
->tag
;
16417 child_die
= child_die
->sibling
)
16419 /* Create the symbol in the DW_TAG_common_block block in the current
16421 sym
= new_symbol (child_die
, NULL
, cu
);
16424 struct attribute
*member_loc
;
16426 common_block
->contents
[common_block
->n_entries
++] = sym
;
16428 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16432 /* GDB has handled this for a long time, but it is
16433 not specified by DWARF. It seems to have been
16434 emitted by gfortran at least as recently as:
16435 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16436 complaint (_("Variable in common block has "
16437 "DW_AT_data_member_location "
16438 "- DIE at %s [in module %s]"),
16439 sect_offset_str (child_die
->sect_off
),
16440 objfile_name (objfile
));
16442 if (member_loc
->form_is_section_offset ())
16443 dwarf2_complex_location_expr_complaint ();
16444 else if (member_loc
->form_is_constant ()
16445 || member_loc
->form_is_block ())
16447 if (attr
!= nullptr)
16448 mark_common_block_symbol_computed (sym
, die
, attr
,
16452 dwarf2_complex_location_expr_complaint ();
16457 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16458 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16462 /* Create a type for a C++ namespace. */
16464 static struct type
*
16465 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16467 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16468 const char *previous_prefix
, *name
;
16472 /* For extensions, reuse the type of the original namespace. */
16473 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16475 struct die_info
*ext_die
;
16476 struct dwarf2_cu
*ext_cu
= cu
;
16478 ext_die
= dwarf2_extension (die
, &ext_cu
);
16479 type
= read_type_die (ext_die
, ext_cu
);
16481 /* EXT_CU may not be the same as CU.
16482 Ensure TYPE is recorded with CU in die_type_hash. */
16483 return set_die_type (die
, type
, cu
);
16486 name
= namespace_name (die
, &is_anonymous
, cu
);
16488 /* Now build the name of the current namespace. */
16490 previous_prefix
= determine_prefix (die
, cu
);
16491 if (previous_prefix
[0] != '\0')
16492 name
= typename_concat (&objfile
->objfile_obstack
,
16493 previous_prefix
, name
, 0, cu
);
16495 /* Create the type. */
16496 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16498 return set_die_type (die
, type
, cu
);
16501 /* Read a namespace scope. */
16504 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16506 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16509 /* Add a symbol associated to this if we haven't seen the namespace
16510 before. Also, add a using directive if it's an anonymous
16513 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16517 type
= read_type_die (die
, cu
);
16518 new_symbol (die
, type
, cu
);
16520 namespace_name (die
, &is_anonymous
, cu
);
16523 const char *previous_prefix
= determine_prefix (die
, cu
);
16525 std::vector
<const char *> excludes
;
16526 add_using_directive (using_directives (cu
),
16527 previous_prefix
, type
->name (), NULL
,
16528 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16532 if (die
->child
!= NULL
)
16534 struct die_info
*child_die
= die
->child
;
16536 while (child_die
&& child_die
->tag
)
16538 process_die (child_die
, cu
);
16539 child_die
= child_die
->sibling
;
16544 /* Read a Fortran module as type. This DIE can be only a declaration used for
16545 imported module. Still we need that type as local Fortran "use ... only"
16546 declaration imports depend on the created type in determine_prefix. */
16548 static struct type
*
16549 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16551 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16552 const char *module_name
;
16555 module_name
= dwarf2_name (die
, cu
);
16556 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16558 return set_die_type (die
, type
, cu
);
16561 /* Read a Fortran module. */
16564 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16566 struct die_info
*child_die
= die
->child
;
16569 type
= read_type_die (die
, cu
);
16570 new_symbol (die
, type
, cu
);
16572 while (child_die
&& child_die
->tag
)
16574 process_die (child_die
, cu
);
16575 child_die
= child_die
->sibling
;
16579 /* Return the name of the namespace represented by DIE. Set
16580 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16583 static const char *
16584 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16586 struct die_info
*current_die
;
16587 const char *name
= NULL
;
16589 /* Loop through the extensions until we find a name. */
16591 for (current_die
= die
;
16592 current_die
!= NULL
;
16593 current_die
= dwarf2_extension (die
, &cu
))
16595 /* We don't use dwarf2_name here so that we can detect the absence
16596 of a name -> anonymous namespace. */
16597 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16603 /* Is it an anonymous namespace? */
16605 *is_anonymous
= (name
== NULL
);
16607 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16612 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16613 the user defined type vector. */
16615 static struct type
*
16616 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16618 struct gdbarch
*gdbarch
16619 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16620 struct comp_unit_head
*cu_header
= &cu
->header
;
16622 struct attribute
*attr_byte_size
;
16623 struct attribute
*attr_address_class
;
16624 int byte_size
, addr_class
;
16625 struct type
*target_type
;
16627 target_type
= die_type (die
, cu
);
16629 /* The die_type call above may have already set the type for this DIE. */
16630 type
= get_die_type (die
, cu
);
16634 type
= lookup_pointer_type (target_type
);
16636 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16637 if (attr_byte_size
)
16638 byte_size
= DW_UNSND (attr_byte_size
);
16640 byte_size
= cu_header
->addr_size
;
16642 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16643 if (attr_address_class
)
16644 addr_class
= DW_UNSND (attr_address_class
);
16646 addr_class
= DW_ADDR_none
;
16648 ULONGEST alignment
= get_alignment (cu
, die
);
16650 /* If the pointer size, alignment, or address class is different
16651 than the default, create a type variant marked as such and set
16652 the length accordingly. */
16653 if (TYPE_LENGTH (type
) != byte_size
16654 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16655 && alignment
!= TYPE_RAW_ALIGN (type
))
16656 || addr_class
!= DW_ADDR_none
)
16658 if (gdbarch_address_class_type_flags_p (gdbarch
))
16662 type_flags
= gdbarch_address_class_type_flags
16663 (gdbarch
, byte_size
, addr_class
);
16664 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16666 type
= make_type_with_address_space (type
, type_flags
);
16668 else if (TYPE_LENGTH (type
) != byte_size
)
16670 complaint (_("invalid pointer size %d"), byte_size
);
16672 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16674 complaint (_("Invalid DW_AT_alignment"
16675 " - DIE at %s [in module %s]"),
16676 sect_offset_str (die
->sect_off
),
16677 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16681 /* Should we also complain about unhandled address classes? */
16685 TYPE_LENGTH (type
) = byte_size
;
16686 set_type_align (type
, alignment
);
16687 return set_die_type (die
, type
, cu
);
16690 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16691 the user defined type vector. */
16693 static struct type
*
16694 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16697 struct type
*to_type
;
16698 struct type
*domain
;
16700 to_type
= die_type (die
, cu
);
16701 domain
= die_containing_type (die
, cu
);
16703 /* The calls above may have already set the type for this DIE. */
16704 type
= get_die_type (die
, cu
);
16708 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
16709 type
= lookup_methodptr_type (to_type
);
16710 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
16712 struct type
*new_type
16713 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16715 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16716 to_type
->fields (), to_type
->num_fields (),
16717 TYPE_VARARGS (to_type
));
16718 type
= lookup_methodptr_type (new_type
);
16721 type
= lookup_memberptr_type (to_type
, domain
);
16723 return set_die_type (die
, type
, cu
);
16726 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16727 the user defined type vector. */
16729 static struct type
*
16730 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16731 enum type_code refcode
)
16733 struct comp_unit_head
*cu_header
= &cu
->header
;
16734 struct type
*type
, *target_type
;
16735 struct attribute
*attr
;
16737 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16739 target_type
= die_type (die
, cu
);
16741 /* The die_type call above may have already set the type for this DIE. */
16742 type
= get_die_type (die
, cu
);
16746 type
= lookup_reference_type (target_type
, refcode
);
16747 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16748 if (attr
!= nullptr)
16750 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16754 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16756 maybe_set_alignment (cu
, die
, type
);
16757 return set_die_type (die
, type
, cu
);
16760 /* Add the given cv-qualifiers to the element type of the array. GCC
16761 outputs DWARF type qualifiers that apply to an array, not the
16762 element type. But GDB relies on the array element type to carry
16763 the cv-qualifiers. This mimics section 6.7.3 of the C99
16766 static struct type
*
16767 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16768 struct type
*base_type
, int cnst
, int voltl
)
16770 struct type
*el_type
, *inner_array
;
16772 base_type
= copy_type (base_type
);
16773 inner_array
= base_type
;
16775 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
16777 TYPE_TARGET_TYPE (inner_array
) =
16778 copy_type (TYPE_TARGET_TYPE (inner_array
));
16779 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16782 el_type
= TYPE_TARGET_TYPE (inner_array
);
16783 cnst
|= TYPE_CONST (el_type
);
16784 voltl
|= TYPE_VOLATILE (el_type
);
16785 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16787 return set_die_type (die
, base_type
, cu
);
16790 static struct type
*
16791 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16793 struct type
*base_type
, *cv_type
;
16795 base_type
= die_type (die
, cu
);
16797 /* The die_type call above may have already set the type for this DIE. */
16798 cv_type
= get_die_type (die
, cu
);
16802 /* In case the const qualifier is applied to an array type, the element type
16803 is so qualified, not the array type (section 6.7.3 of C99). */
16804 if (base_type
->code () == TYPE_CODE_ARRAY
)
16805 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16807 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16808 return set_die_type (die
, cv_type
, cu
);
16811 static struct type
*
16812 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16814 struct type
*base_type
, *cv_type
;
16816 base_type
= die_type (die
, cu
);
16818 /* The die_type call above may have already set the type for this DIE. */
16819 cv_type
= get_die_type (die
, cu
);
16823 /* In case the volatile qualifier is applied to an array type, the
16824 element type is so qualified, not the array type (section 6.7.3
16826 if (base_type
->code () == TYPE_CODE_ARRAY
)
16827 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16829 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16830 return set_die_type (die
, cv_type
, cu
);
16833 /* Handle DW_TAG_restrict_type. */
16835 static struct type
*
16836 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16838 struct type
*base_type
, *cv_type
;
16840 base_type
= die_type (die
, cu
);
16842 /* The die_type call above may have already set the type for this DIE. */
16843 cv_type
= get_die_type (die
, cu
);
16847 cv_type
= make_restrict_type (base_type
);
16848 return set_die_type (die
, cv_type
, cu
);
16851 /* Handle DW_TAG_atomic_type. */
16853 static struct type
*
16854 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16856 struct type
*base_type
, *cv_type
;
16858 base_type
= die_type (die
, cu
);
16860 /* The die_type call above may have already set the type for this DIE. */
16861 cv_type
= get_die_type (die
, cu
);
16865 cv_type
= make_atomic_type (base_type
);
16866 return set_die_type (die
, cv_type
, cu
);
16869 /* Extract all information from a DW_TAG_string_type DIE and add to
16870 the user defined type vector. It isn't really a user defined type,
16871 but it behaves like one, with other DIE's using an AT_user_def_type
16872 attribute to reference it. */
16874 static struct type
*
16875 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16877 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16878 struct gdbarch
*gdbarch
= objfile
->arch ();
16879 struct type
*type
, *range_type
, *index_type
, *char_type
;
16880 struct attribute
*attr
;
16881 struct dynamic_prop prop
;
16882 bool length_is_constant
= true;
16885 /* There are a couple of places where bit sizes might be made use of
16886 when parsing a DW_TAG_string_type, however, no producer that we know
16887 of make use of these. Handling bit sizes that are a multiple of the
16888 byte size is easy enough, but what about other bit sizes? Lets deal
16889 with that problem when we have to. Warn about these attributes being
16890 unsupported, then parse the type and ignore them like we always
16892 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16893 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16895 static bool warning_printed
= false;
16896 if (!warning_printed
)
16898 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16899 "currently supported on DW_TAG_string_type."));
16900 warning_printed
= true;
16904 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16905 if (attr
!= nullptr && !attr
->form_is_constant ())
16907 /* The string length describes the location at which the length of
16908 the string can be found. The size of the length field can be
16909 specified with one of the attributes below. */
16910 struct type
*prop_type
;
16911 struct attribute
*len
16912 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16913 if (len
== nullptr)
16914 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16915 if (len
!= nullptr && len
->form_is_constant ())
16917 /* Pass 0 as the default as we know this attribute is constant
16918 and the default value will not be returned. */
16919 LONGEST sz
= len
->constant_value (0);
16920 prop_type
= cu
->per_cu
->int_type (sz
, true);
16924 /* If the size is not specified then we assume it is the size of
16925 an address on this target. */
16926 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16929 /* Convert the attribute into a dynamic property. */
16930 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16933 length_is_constant
= false;
16935 else if (attr
!= nullptr)
16937 /* This DW_AT_string_length just contains the length with no
16938 indirection. There's no need to create a dynamic property in this
16939 case. Pass 0 for the default value as we know it will not be
16940 returned in this case. */
16941 length
= attr
->constant_value (0);
16943 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16945 /* We don't currently support non-constant byte sizes for strings. */
16946 length
= attr
->constant_value (1);
16950 /* Use 1 as a fallback length if we have nothing else. */
16954 index_type
= objfile_type (objfile
)->builtin_int
;
16955 if (length_is_constant
)
16956 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16959 struct dynamic_prop low_bound
;
16961 low_bound
.kind
= PROP_CONST
;
16962 low_bound
.data
.const_val
= 1;
16963 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16965 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16966 type
= create_string_type (NULL
, char_type
, range_type
);
16968 return set_die_type (die
, type
, cu
);
16971 /* Assuming that DIE corresponds to a function, returns nonzero
16972 if the function is prototyped. */
16975 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16977 struct attribute
*attr
;
16979 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16980 if (attr
&& (DW_UNSND (attr
) != 0))
16983 /* The DWARF standard implies that the DW_AT_prototyped attribute
16984 is only meaningful for C, but the concept also extends to other
16985 languages that allow unprototyped functions (Eg: Objective C).
16986 For all other languages, assume that functions are always
16988 if (cu
->language
!= language_c
16989 && cu
->language
!= language_objc
16990 && cu
->language
!= language_opencl
)
16993 /* RealView does not emit DW_AT_prototyped. We can not distinguish
16994 prototyped and unprototyped functions; default to prototyped,
16995 since that is more common in modern code (and RealView warns
16996 about unprototyped functions). */
16997 if (producer_is_realview (cu
->producer
))
17003 /* Handle DIES due to C code like:
17007 int (*funcp)(int a, long l);
17011 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17013 static struct type
*
17014 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17016 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17017 struct type
*type
; /* Type that this function returns. */
17018 struct type
*ftype
; /* Function that returns above type. */
17019 struct attribute
*attr
;
17021 type
= die_type (die
, cu
);
17023 /* The die_type call above may have already set the type for this DIE. */
17024 ftype
= get_die_type (die
, cu
);
17028 ftype
= lookup_function_type (type
);
17030 if (prototyped_function_p (die
, cu
))
17031 TYPE_PROTOTYPED (ftype
) = 1;
17033 /* Store the calling convention in the type if it's available in
17034 the subroutine die. Otherwise set the calling convention to
17035 the default value DW_CC_normal. */
17036 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17037 if (attr
!= nullptr
17038 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17039 TYPE_CALLING_CONVENTION (ftype
)
17040 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17041 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17042 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17044 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17046 /* Record whether the function returns normally to its caller or not
17047 if the DWARF producer set that information. */
17048 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17049 if (attr
&& (DW_UNSND (attr
) != 0))
17050 TYPE_NO_RETURN (ftype
) = 1;
17052 /* We need to add the subroutine type to the die immediately so
17053 we don't infinitely recurse when dealing with parameters
17054 declared as the same subroutine type. */
17055 set_die_type (die
, ftype
, cu
);
17057 if (die
->child
!= NULL
)
17059 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17060 struct die_info
*child_die
;
17061 int nparams
, iparams
;
17063 /* Count the number of parameters.
17064 FIXME: GDB currently ignores vararg functions, but knows about
17065 vararg member functions. */
17067 child_die
= die
->child
;
17068 while (child_die
&& child_die
->tag
)
17070 if (child_die
->tag
== DW_TAG_formal_parameter
)
17072 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17073 TYPE_VARARGS (ftype
) = 1;
17074 child_die
= child_die
->sibling
;
17077 /* Allocate storage for parameters and fill them in. */
17078 ftype
->set_num_fields (nparams
);
17080 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
17082 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17083 even if we error out during the parameters reading below. */
17084 for (iparams
= 0; iparams
< nparams
; iparams
++)
17085 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17088 child_die
= die
->child
;
17089 while (child_die
&& child_die
->tag
)
17091 if (child_die
->tag
== DW_TAG_formal_parameter
)
17093 struct type
*arg_type
;
17095 /* DWARF version 2 has no clean way to discern C++
17096 static and non-static member functions. G++ helps
17097 GDB by marking the first parameter for non-static
17098 member functions (which is the this pointer) as
17099 artificial. We pass this information to
17100 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17102 DWARF version 3 added DW_AT_object_pointer, which GCC
17103 4.5 does not yet generate. */
17104 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17105 if (attr
!= nullptr)
17106 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17108 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17109 arg_type
= die_type (child_die
, cu
);
17111 /* RealView does not mark THIS as const, which the testsuite
17112 expects. GCC marks THIS as const in method definitions,
17113 but not in the class specifications (GCC PR 43053). */
17114 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17115 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17118 struct dwarf2_cu
*arg_cu
= cu
;
17119 const char *name
= dwarf2_name (child_die
, cu
);
17121 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17122 if (attr
!= nullptr)
17124 /* If the compiler emits this, use it. */
17125 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17128 else if (name
&& strcmp (name
, "this") == 0)
17129 /* Function definitions will have the argument names. */
17131 else if (name
== NULL
&& iparams
== 0)
17132 /* Declarations may not have the names, so like
17133 elsewhere in GDB, assume an artificial first
17134 argument is "this". */
17138 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17142 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17145 child_die
= child_die
->sibling
;
17152 static struct type
*
17153 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17155 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17156 const char *name
= NULL
;
17157 struct type
*this_type
, *target_type
;
17159 name
= dwarf2_full_name (NULL
, die
, cu
);
17160 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17161 TYPE_TARGET_STUB (this_type
) = 1;
17162 set_die_type (die
, this_type
, cu
);
17163 target_type
= die_type (die
, cu
);
17164 if (target_type
!= this_type
)
17165 TYPE_TARGET_TYPE (this_type
) = target_type
;
17168 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17169 spec and cause infinite loops in GDB. */
17170 complaint (_("Self-referential DW_TAG_typedef "
17171 "- DIE at %s [in module %s]"),
17172 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17173 TYPE_TARGET_TYPE (this_type
) = NULL
;
17177 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17178 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17179 Handle these by just returning the target type, rather than
17180 constructing an anonymous typedef type and trying to handle this
17182 set_die_type (die
, target_type
, cu
);
17183 return target_type
;
17188 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17189 (which may be different from NAME) to the architecture back-end to allow
17190 it to guess the correct format if necessary. */
17192 static struct type
*
17193 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17194 const char *name_hint
, enum bfd_endian byte_order
)
17196 struct gdbarch
*gdbarch
= objfile
->arch ();
17197 const struct floatformat
**format
;
17200 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17202 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17204 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17209 /* Allocate an integer type of size BITS and name NAME. */
17211 static struct type
*
17212 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17213 int bits
, int unsigned_p
, const char *name
)
17217 /* Versions of Intel's C Compiler generate an integer type called "void"
17218 instead of using DW_TAG_unspecified_type. This has been seen on
17219 at least versions 14, 17, and 18. */
17220 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17221 && strcmp (name
, "void") == 0)
17222 type
= objfile_type (objfile
)->builtin_void
;
17224 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17229 /* Initialise and return a floating point type of size BITS suitable for
17230 use as a component of a complex number. The NAME_HINT is passed through
17231 when initialising the floating point type and is the name of the complex
17234 As DWARF doesn't currently provide an explicit name for the components
17235 of a complex number, but it can be helpful to have these components
17236 named, we try to select a suitable name based on the size of the
17238 static struct type
*
17239 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17240 struct objfile
*objfile
,
17241 int bits
, const char *name_hint
,
17242 enum bfd_endian byte_order
)
17244 gdbarch
*gdbarch
= objfile
->arch ();
17245 struct type
*tt
= nullptr;
17247 /* Try to find a suitable floating point builtin type of size BITS.
17248 We're going to use the name of this type as the name for the complex
17249 target type that we are about to create. */
17250 switch (cu
->language
)
17252 case language_fortran
:
17256 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17259 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17261 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17263 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17271 tt
= builtin_type (gdbarch
)->builtin_float
;
17274 tt
= builtin_type (gdbarch
)->builtin_double
;
17276 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17278 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17284 /* If the type we found doesn't match the size we were looking for, then
17285 pretend we didn't find a type at all, the complex target type we
17286 create will then be nameless. */
17287 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17290 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
17291 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17294 /* Find a representation of a given base type and install
17295 it in the TYPE field of the die. */
17297 static struct type
*
17298 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17300 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17302 struct attribute
*attr
;
17303 int encoding
= 0, bits
= 0;
17307 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17308 if (attr
!= nullptr)
17309 encoding
= DW_UNSND (attr
);
17310 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17311 if (attr
!= nullptr)
17312 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17313 name
= dwarf2_name (die
, cu
);
17315 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17317 arch
= objfile
->arch ();
17318 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17320 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17323 int endianity
= DW_UNSND (attr
);
17328 byte_order
= BFD_ENDIAN_BIG
;
17330 case DW_END_little
:
17331 byte_order
= BFD_ENDIAN_LITTLE
;
17334 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17341 case DW_ATE_address
:
17342 /* Turn DW_ATE_address into a void * pointer. */
17343 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17344 type
= init_pointer_type (objfile
, bits
, name
, type
);
17346 case DW_ATE_boolean
:
17347 type
= init_boolean_type (objfile
, bits
, 1, name
);
17349 case DW_ATE_complex_float
:
17350 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17352 if (type
->code () == TYPE_CODE_ERROR
)
17354 if (name
== nullptr)
17356 struct obstack
*obstack
17357 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17358 name
= obconcat (obstack
, "_Complex ", type
->name (),
17361 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17364 type
= init_complex_type (name
, type
);
17366 case DW_ATE_decimal_float
:
17367 type
= init_decfloat_type (objfile
, bits
, name
);
17370 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17372 case DW_ATE_signed
:
17373 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17375 case DW_ATE_unsigned
:
17376 if (cu
->language
== language_fortran
17378 && startswith (name
, "character("))
17379 type
= init_character_type (objfile
, bits
, 1, name
);
17381 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17383 case DW_ATE_signed_char
:
17384 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17385 || cu
->language
== language_pascal
17386 || cu
->language
== language_fortran
)
17387 type
= init_character_type (objfile
, bits
, 0, name
);
17389 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17391 case DW_ATE_unsigned_char
:
17392 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17393 || cu
->language
== language_pascal
17394 || cu
->language
== language_fortran
17395 || cu
->language
== language_rust
)
17396 type
= init_character_type (objfile
, bits
, 1, name
);
17398 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17403 type
= builtin_type (arch
)->builtin_char16
;
17404 else if (bits
== 32)
17405 type
= builtin_type (arch
)->builtin_char32
;
17408 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17410 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17412 return set_die_type (die
, type
, cu
);
17417 complaint (_("unsupported DW_AT_encoding: '%s'"),
17418 dwarf_type_encoding_name (encoding
));
17419 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17423 if (name
&& strcmp (name
, "char") == 0)
17424 TYPE_NOSIGN (type
) = 1;
17426 maybe_set_alignment (cu
, die
, type
);
17428 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17430 return set_die_type (die
, type
, cu
);
17433 /* Parse dwarf attribute if it's a block, reference or constant and put the
17434 resulting value of the attribute into struct bound_prop.
17435 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17438 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17439 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17440 struct type
*default_type
)
17442 struct dwarf2_property_baton
*baton
;
17443 struct obstack
*obstack
17444 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17446 gdb_assert (default_type
!= NULL
);
17448 if (attr
== NULL
|| prop
== NULL
)
17451 if (attr
->form_is_block ())
17453 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17454 baton
->property_type
= default_type
;
17455 baton
->locexpr
.per_cu
= cu
->per_cu
;
17456 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17457 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17458 switch (attr
->name
)
17460 case DW_AT_string_length
:
17461 baton
->locexpr
.is_reference
= true;
17464 baton
->locexpr
.is_reference
= false;
17467 prop
->data
.baton
= baton
;
17468 prop
->kind
= PROP_LOCEXPR
;
17469 gdb_assert (prop
->data
.baton
!= NULL
);
17471 else if (attr
->form_is_ref ())
17473 struct dwarf2_cu
*target_cu
= cu
;
17474 struct die_info
*target_die
;
17475 struct attribute
*target_attr
;
17477 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17478 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17479 if (target_attr
== NULL
)
17480 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17482 if (target_attr
== NULL
)
17485 switch (target_attr
->name
)
17487 case DW_AT_location
:
17488 if (target_attr
->form_is_section_offset ())
17490 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17491 baton
->property_type
= die_type (target_die
, target_cu
);
17492 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17493 prop
->data
.baton
= baton
;
17494 prop
->kind
= PROP_LOCLIST
;
17495 gdb_assert (prop
->data
.baton
!= NULL
);
17497 else if (target_attr
->form_is_block ())
17499 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17500 baton
->property_type
= die_type (target_die
, target_cu
);
17501 baton
->locexpr
.per_cu
= cu
->per_cu
;
17502 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17503 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17504 baton
->locexpr
.is_reference
= true;
17505 prop
->data
.baton
= baton
;
17506 prop
->kind
= PROP_LOCEXPR
;
17507 gdb_assert (prop
->data
.baton
!= NULL
);
17511 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17512 "dynamic property");
17516 case DW_AT_data_member_location
:
17520 if (!handle_data_member_location (target_die
, target_cu
,
17524 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17525 baton
->property_type
= read_type_die (target_die
->parent
,
17527 baton
->offset_info
.offset
= offset
;
17528 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17529 prop
->data
.baton
= baton
;
17530 prop
->kind
= PROP_ADDR_OFFSET
;
17535 else if (attr
->form_is_constant ())
17537 prop
->data
.const_val
= attr
->constant_value (0);
17538 prop
->kind
= PROP_CONST
;
17542 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17543 dwarf2_name (die
, cu
));
17553 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17555 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17556 struct type
*int_type
;
17558 /* Helper macro to examine the various builtin types. */
17559 #define TRY_TYPE(F) \
17560 int_type = (unsigned_p \
17561 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17562 : objfile_type (objfile)->builtin_ ## F); \
17563 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17570 TRY_TYPE (long_long
);
17574 gdb_assert_not_reached ("unable to find suitable integer type");
17580 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17582 int addr_size
= this->addr_size ();
17583 return int_type (addr_size
, unsigned_p
);
17586 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17587 present (which is valid) then compute the default type based on the
17588 compilation units address size. */
17590 static struct type
*
17591 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17593 struct type
*index_type
= die_type (die
, cu
);
17595 /* Dwarf-2 specifications explicitly allows to create subrange types
17596 without specifying a base type.
17597 In that case, the base type must be set to the type of
17598 the lower bound, upper bound or count, in that order, if any of these
17599 three attributes references an object that has a type.
17600 If no base type is found, the Dwarf-2 specifications say that
17601 a signed integer type of size equal to the size of an address should
17603 For the following C code: `extern char gdb_int [];'
17604 GCC produces an empty range DIE.
17605 FIXME: muller/2010-05-28: Possible references to object for low bound,
17606 high bound or count are not yet handled by this code. */
17607 if (index_type
->code () == TYPE_CODE_VOID
)
17608 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17613 /* Read the given DW_AT_subrange DIE. */
17615 static struct type
*
17616 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17618 struct type
*base_type
, *orig_base_type
;
17619 struct type
*range_type
;
17620 struct attribute
*attr
;
17621 struct dynamic_prop low
, high
;
17622 int low_default_is_valid
;
17623 int high_bound_is_count
= 0;
17625 ULONGEST negative_mask
;
17627 orig_base_type
= read_subrange_index_type (die
, cu
);
17629 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17630 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17631 creating the range type, but we use the result of check_typedef
17632 when examining properties of the type. */
17633 base_type
= check_typedef (orig_base_type
);
17635 /* The die_type call above may have already set the type for this DIE. */
17636 range_type
= get_die_type (die
, cu
);
17640 low
.kind
= PROP_CONST
;
17641 high
.kind
= PROP_CONST
;
17642 high
.data
.const_val
= 0;
17644 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17645 omitting DW_AT_lower_bound. */
17646 switch (cu
->language
)
17649 case language_cplus
:
17650 low
.data
.const_val
= 0;
17651 low_default_is_valid
= 1;
17653 case language_fortran
:
17654 low
.data
.const_val
= 1;
17655 low_default_is_valid
= 1;
17658 case language_objc
:
17659 case language_rust
:
17660 low
.data
.const_val
= 0;
17661 low_default_is_valid
= (cu
->header
.version
>= 4);
17665 case language_pascal
:
17666 low
.data
.const_val
= 1;
17667 low_default_is_valid
= (cu
->header
.version
>= 4);
17670 low
.data
.const_val
= 0;
17671 low_default_is_valid
= 0;
17675 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17676 if (attr
!= nullptr)
17677 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17678 else if (!low_default_is_valid
)
17679 complaint (_("Missing DW_AT_lower_bound "
17680 "- DIE at %s [in module %s]"),
17681 sect_offset_str (die
->sect_off
),
17682 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17684 struct attribute
*attr_ub
, *attr_count
;
17685 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17686 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17688 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17689 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17691 /* If bounds are constant do the final calculation here. */
17692 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17693 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17695 high_bound_is_count
= 1;
17699 if (attr_ub
!= NULL
)
17700 complaint (_("Unresolved DW_AT_upper_bound "
17701 "- DIE at %s [in module %s]"),
17702 sect_offset_str (die
->sect_off
),
17703 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17704 if (attr_count
!= NULL
)
17705 complaint (_("Unresolved DW_AT_count "
17706 "- DIE at %s [in module %s]"),
17707 sect_offset_str (die
->sect_off
),
17708 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17713 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17714 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17715 bias
= bias_attr
->constant_value (0);
17717 /* Normally, the DWARF producers are expected to use a signed
17718 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17719 But this is unfortunately not always the case, as witnessed
17720 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17721 is used instead. To work around that ambiguity, we treat
17722 the bounds as signed, and thus sign-extend their values, when
17723 the base type is signed. */
17725 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17726 if (low
.kind
== PROP_CONST
17727 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17728 low
.data
.const_val
|= negative_mask
;
17729 if (high
.kind
== PROP_CONST
17730 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17731 high
.data
.const_val
|= negative_mask
;
17733 /* Check for bit and byte strides. */
17734 struct dynamic_prop byte_stride_prop
;
17735 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17736 if (attr_byte_stride
!= nullptr)
17738 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17739 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17743 struct dynamic_prop bit_stride_prop
;
17744 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17745 if (attr_bit_stride
!= nullptr)
17747 /* It only makes sense to have either a bit or byte stride. */
17748 if (attr_byte_stride
!= nullptr)
17750 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17751 "- DIE at %s [in module %s]"),
17752 sect_offset_str (die
->sect_off
),
17753 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17754 attr_bit_stride
= nullptr;
17758 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17759 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17764 if (attr_byte_stride
!= nullptr
17765 || attr_bit_stride
!= nullptr)
17767 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17768 struct dynamic_prop
*stride
17769 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17772 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17773 &high
, bias
, stride
, byte_stride_p
);
17776 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17778 if (high_bound_is_count
)
17779 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17781 /* Ada expects an empty array on no boundary attributes. */
17782 if (attr
== NULL
&& cu
->language
!= language_ada
)
17783 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17785 name
= dwarf2_name (die
, cu
);
17787 range_type
->set_name (name
);
17789 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17790 if (attr
!= nullptr)
17791 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17793 maybe_set_alignment (cu
, die
, range_type
);
17795 set_die_type (die
, range_type
, cu
);
17797 /* set_die_type should be already done. */
17798 set_descriptive_type (range_type
, die
, cu
);
17803 static struct type
*
17804 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17808 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17810 type
->set_name (dwarf2_name (die
, cu
));
17812 /* In Ada, an unspecified type is typically used when the description
17813 of the type is deferred to a different unit. When encountering
17814 such a type, we treat it as a stub, and try to resolve it later on,
17816 if (cu
->language
== language_ada
)
17817 TYPE_STUB (type
) = 1;
17819 return set_die_type (die
, type
, cu
);
17822 /* Read a single die and all its descendents. Set the die's sibling
17823 field to NULL; set other fields in the die correctly, and set all
17824 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17825 location of the info_ptr after reading all of those dies. PARENT
17826 is the parent of the die in question. */
17828 static struct die_info
*
17829 read_die_and_children (const struct die_reader_specs
*reader
,
17830 const gdb_byte
*info_ptr
,
17831 const gdb_byte
**new_info_ptr
,
17832 struct die_info
*parent
)
17834 struct die_info
*die
;
17835 const gdb_byte
*cur_ptr
;
17837 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17840 *new_info_ptr
= cur_ptr
;
17843 store_in_ref_table (die
, reader
->cu
);
17845 if (die
->has_children
)
17846 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17850 *new_info_ptr
= cur_ptr
;
17853 die
->sibling
= NULL
;
17854 die
->parent
= parent
;
17858 /* Read a die, all of its descendents, and all of its siblings; set
17859 all of the fields of all of the dies correctly. Arguments are as
17860 in read_die_and_children. */
17862 static struct die_info
*
17863 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17864 const gdb_byte
*info_ptr
,
17865 const gdb_byte
**new_info_ptr
,
17866 struct die_info
*parent
)
17868 struct die_info
*first_die
, *last_sibling
;
17869 const gdb_byte
*cur_ptr
;
17871 cur_ptr
= info_ptr
;
17872 first_die
= last_sibling
= NULL
;
17876 struct die_info
*die
17877 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17881 *new_info_ptr
= cur_ptr
;
17888 last_sibling
->sibling
= die
;
17890 last_sibling
= die
;
17894 /* Read a die, all of its descendents, and all of its siblings; set
17895 all of the fields of all of the dies correctly. Arguments are as
17896 in read_die_and_children.
17897 This the main entry point for reading a DIE and all its children. */
17899 static struct die_info
*
17900 read_die_and_siblings (const struct die_reader_specs
*reader
,
17901 const gdb_byte
*info_ptr
,
17902 const gdb_byte
**new_info_ptr
,
17903 struct die_info
*parent
)
17905 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17906 new_info_ptr
, parent
);
17908 if (dwarf_die_debug
)
17910 fprintf_unfiltered (gdb_stdlog
,
17911 "Read die from %s@0x%x of %s:\n",
17912 reader
->die_section
->get_name (),
17913 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17914 bfd_get_filename (reader
->abfd
));
17915 dump_die (die
, dwarf_die_debug
);
17921 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17923 The caller is responsible for filling in the extra attributes
17924 and updating (*DIEP)->num_attrs.
17925 Set DIEP to point to a newly allocated die with its information,
17926 except for its child, sibling, and parent fields. */
17928 static const gdb_byte
*
17929 read_full_die_1 (const struct die_reader_specs
*reader
,
17930 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17931 int num_extra_attrs
)
17933 unsigned int abbrev_number
, bytes_read
, i
;
17934 struct abbrev_info
*abbrev
;
17935 struct die_info
*die
;
17936 struct dwarf2_cu
*cu
= reader
->cu
;
17937 bfd
*abfd
= reader
->abfd
;
17939 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17940 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17941 info_ptr
+= bytes_read
;
17942 if (!abbrev_number
)
17948 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17950 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17952 bfd_get_filename (abfd
));
17954 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17955 die
->sect_off
= sect_off
;
17956 die
->tag
= abbrev
->tag
;
17957 die
->abbrev
= abbrev_number
;
17958 die
->has_children
= abbrev
->has_children
;
17960 /* Make the result usable.
17961 The caller needs to update num_attrs after adding the extra
17963 die
->num_attrs
= abbrev
->num_attrs
;
17965 std::vector
<int> indexes_that_need_reprocess
;
17966 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17968 bool need_reprocess
;
17970 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17971 info_ptr
, &need_reprocess
);
17972 if (need_reprocess
)
17973 indexes_that_need_reprocess
.push_back (i
);
17976 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17977 if (attr
!= nullptr)
17978 cu
->str_offsets_base
= DW_UNSND (attr
);
17980 attr
= die
->attr (DW_AT_loclists_base
);
17981 if (attr
!= nullptr)
17982 cu
->loclist_base
= DW_UNSND (attr
);
17984 auto maybe_addr_base
= die
->addr_base ();
17985 if (maybe_addr_base
.has_value ())
17986 cu
->addr_base
= *maybe_addr_base
;
17987 for (int index
: indexes_that_need_reprocess
)
17988 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
17993 /* Read a die and all its attributes.
17994 Set DIEP to point to a newly allocated die with its information,
17995 except for its child, sibling, and parent fields. */
17997 static const gdb_byte
*
17998 read_full_die (const struct die_reader_specs
*reader
,
17999 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18001 const gdb_byte
*result
;
18003 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18005 if (dwarf_die_debug
)
18007 fprintf_unfiltered (gdb_stdlog
,
18008 "Read die from %s@0x%x of %s:\n",
18009 reader
->die_section
->get_name (),
18010 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18011 bfd_get_filename (reader
->abfd
));
18012 dump_die (*diep
, dwarf_die_debug
);
18019 /* Returns nonzero if TAG represents a type that we might generate a partial
18023 is_type_tag_for_partial (int tag
)
18028 /* Some types that would be reasonable to generate partial symbols for,
18029 that we don't at present. */
18030 case DW_TAG_array_type
:
18031 case DW_TAG_file_type
:
18032 case DW_TAG_ptr_to_member_type
:
18033 case DW_TAG_set_type
:
18034 case DW_TAG_string_type
:
18035 case DW_TAG_subroutine_type
:
18037 case DW_TAG_base_type
:
18038 case DW_TAG_class_type
:
18039 case DW_TAG_interface_type
:
18040 case DW_TAG_enumeration_type
:
18041 case DW_TAG_structure_type
:
18042 case DW_TAG_subrange_type
:
18043 case DW_TAG_typedef
:
18044 case DW_TAG_union_type
:
18051 /* Load all DIEs that are interesting for partial symbols into memory. */
18053 static struct partial_die_info
*
18054 load_partial_dies (const struct die_reader_specs
*reader
,
18055 const gdb_byte
*info_ptr
, int building_psymtab
)
18057 struct dwarf2_cu
*cu
= reader
->cu
;
18058 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18059 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18060 unsigned int bytes_read
;
18061 unsigned int load_all
= 0;
18062 int nesting_level
= 1;
18067 gdb_assert (cu
->per_cu
!= NULL
);
18068 if (cu
->per_cu
->load_all_dies
)
18072 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18076 &cu
->comp_unit_obstack
,
18077 hashtab_obstack_allocate
,
18078 dummy_obstack_deallocate
);
18082 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18084 /* A NULL abbrev means the end of a series of children. */
18085 if (abbrev
== NULL
)
18087 if (--nesting_level
== 0)
18090 info_ptr
+= bytes_read
;
18091 last_die
= parent_die
;
18092 parent_die
= parent_die
->die_parent
;
18096 /* Check for template arguments. We never save these; if
18097 they're seen, we just mark the parent, and go on our way. */
18098 if (parent_die
!= NULL
18099 && cu
->language
== language_cplus
18100 && (abbrev
->tag
== DW_TAG_template_type_param
18101 || abbrev
->tag
== DW_TAG_template_value_param
))
18103 parent_die
->has_template_arguments
= 1;
18107 /* We don't need a partial DIE for the template argument. */
18108 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18113 /* We only recurse into c++ subprograms looking for template arguments.
18114 Skip their other children. */
18116 && cu
->language
== language_cplus
18117 && parent_die
!= NULL
18118 && parent_die
->tag
== DW_TAG_subprogram
)
18120 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18124 /* Check whether this DIE is interesting enough to save. Normally
18125 we would not be interested in members here, but there may be
18126 later variables referencing them via DW_AT_specification (for
18127 static members). */
18129 && !is_type_tag_for_partial (abbrev
->tag
)
18130 && abbrev
->tag
!= DW_TAG_constant
18131 && abbrev
->tag
!= DW_TAG_enumerator
18132 && abbrev
->tag
!= DW_TAG_subprogram
18133 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18134 && abbrev
->tag
!= DW_TAG_lexical_block
18135 && abbrev
->tag
!= DW_TAG_variable
18136 && abbrev
->tag
!= DW_TAG_namespace
18137 && abbrev
->tag
!= DW_TAG_module
18138 && abbrev
->tag
!= DW_TAG_member
18139 && abbrev
->tag
!= DW_TAG_imported_unit
18140 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18142 /* Otherwise we skip to the next sibling, if any. */
18143 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18147 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18150 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18152 /* This two-pass algorithm for processing partial symbols has a
18153 high cost in cache pressure. Thus, handle some simple cases
18154 here which cover the majority of C partial symbols. DIEs
18155 which neither have specification tags in them, nor could have
18156 specification tags elsewhere pointing at them, can simply be
18157 processed and discarded.
18159 This segment is also optional; scan_partial_symbols and
18160 add_partial_symbol will handle these DIEs if we chain
18161 them in normally. When compilers which do not emit large
18162 quantities of duplicate debug information are more common,
18163 this code can probably be removed. */
18165 /* Any complete simple types at the top level (pretty much all
18166 of them, for a language without namespaces), can be processed
18168 if (parent_die
== NULL
18169 && pdi
.has_specification
== 0
18170 && pdi
.is_declaration
== 0
18171 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18172 || pdi
.tag
== DW_TAG_base_type
18173 || pdi
.tag
== DW_TAG_subrange_type
))
18175 if (building_psymtab
&& pdi
.name
!= NULL
)
18176 add_psymbol_to_list (pdi
.name
, false,
18177 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18178 psymbol_placement::STATIC
,
18179 0, cu
->language
, objfile
);
18180 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18184 /* The exception for DW_TAG_typedef with has_children above is
18185 a workaround of GCC PR debug/47510. In the case of this complaint
18186 type_name_or_error will error on such types later.
18188 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18189 it could not find the child DIEs referenced later, this is checked
18190 above. In correct DWARF DW_TAG_typedef should have no children. */
18192 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18193 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18194 "- DIE at %s [in module %s]"),
18195 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18197 /* If we're at the second level, and we're an enumerator, and
18198 our parent has no specification (meaning possibly lives in a
18199 namespace elsewhere), then we can add the partial symbol now
18200 instead of queueing it. */
18201 if (pdi
.tag
== DW_TAG_enumerator
18202 && parent_die
!= NULL
18203 && parent_die
->die_parent
== NULL
18204 && parent_die
->tag
== DW_TAG_enumeration_type
18205 && parent_die
->has_specification
== 0)
18207 if (pdi
.name
== NULL
)
18208 complaint (_("malformed enumerator DIE ignored"));
18209 else if (building_psymtab
)
18210 add_psymbol_to_list (pdi
.name
, false,
18211 VAR_DOMAIN
, LOC_CONST
, -1,
18212 cu
->language
== language_cplus
18213 ? psymbol_placement::GLOBAL
18214 : psymbol_placement::STATIC
,
18215 0, cu
->language
, objfile
);
18217 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18221 struct partial_die_info
*part_die
18222 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18224 /* We'll save this DIE so link it in. */
18225 part_die
->die_parent
= parent_die
;
18226 part_die
->die_sibling
= NULL
;
18227 part_die
->die_child
= NULL
;
18229 if (last_die
&& last_die
== parent_die
)
18230 last_die
->die_child
= part_die
;
18232 last_die
->die_sibling
= part_die
;
18234 last_die
= part_die
;
18236 if (first_die
== NULL
)
18237 first_die
= part_die
;
18239 /* Maybe add the DIE to the hash table. Not all DIEs that we
18240 find interesting need to be in the hash table, because we
18241 also have the parent/sibling/child chains; only those that we
18242 might refer to by offset later during partial symbol reading.
18244 For now this means things that might have be the target of a
18245 DW_AT_specification, DW_AT_abstract_origin, or
18246 DW_AT_extension. DW_AT_extension will refer only to
18247 namespaces; DW_AT_abstract_origin refers to functions (and
18248 many things under the function DIE, but we do not recurse
18249 into function DIEs during partial symbol reading) and
18250 possibly variables as well; DW_AT_specification refers to
18251 declarations. Declarations ought to have the DW_AT_declaration
18252 flag. It happens that GCC forgets to put it in sometimes, but
18253 only for functions, not for types.
18255 Adding more things than necessary to the hash table is harmless
18256 except for the performance cost. Adding too few will result in
18257 wasted time in find_partial_die, when we reread the compilation
18258 unit with load_all_dies set. */
18261 || abbrev
->tag
== DW_TAG_constant
18262 || abbrev
->tag
== DW_TAG_subprogram
18263 || abbrev
->tag
== DW_TAG_variable
18264 || abbrev
->tag
== DW_TAG_namespace
18265 || part_die
->is_declaration
)
18269 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18270 to_underlying (part_die
->sect_off
),
18275 /* For some DIEs we want to follow their children (if any). For C
18276 we have no reason to follow the children of structures; for other
18277 languages we have to, so that we can get at method physnames
18278 to infer fully qualified class names, for DW_AT_specification,
18279 and for C++ template arguments. For C++, we also look one level
18280 inside functions to find template arguments (if the name of the
18281 function does not already contain the template arguments).
18283 For Ada and Fortran, we need to scan the children of subprograms
18284 and lexical blocks as well because these languages allow the
18285 definition of nested entities that could be interesting for the
18286 debugger, such as nested subprograms for instance. */
18287 if (last_die
->has_children
18289 || last_die
->tag
== DW_TAG_namespace
18290 || last_die
->tag
== DW_TAG_module
18291 || last_die
->tag
== DW_TAG_enumeration_type
18292 || (cu
->language
== language_cplus
18293 && last_die
->tag
== DW_TAG_subprogram
18294 && (last_die
->name
== NULL
18295 || strchr (last_die
->name
, '<') == NULL
))
18296 || (cu
->language
!= language_c
18297 && (last_die
->tag
== DW_TAG_class_type
18298 || last_die
->tag
== DW_TAG_interface_type
18299 || last_die
->tag
== DW_TAG_structure_type
18300 || last_die
->tag
== DW_TAG_union_type
))
18301 || ((cu
->language
== language_ada
18302 || cu
->language
== language_fortran
)
18303 && (last_die
->tag
== DW_TAG_subprogram
18304 || last_die
->tag
== DW_TAG_lexical_block
))))
18307 parent_die
= last_die
;
18311 /* Otherwise we skip to the next sibling, if any. */
18312 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18314 /* Back to the top, do it again. */
18318 partial_die_info::partial_die_info (sect_offset sect_off_
,
18319 struct abbrev_info
*abbrev
)
18320 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18324 /* Read a minimal amount of information into the minimal die structure.
18325 INFO_PTR should point just after the initial uleb128 of a DIE. */
18328 partial_die_info::read (const struct die_reader_specs
*reader
,
18329 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18331 struct dwarf2_cu
*cu
= reader
->cu
;
18332 struct dwarf2_per_objfile
*dwarf2_per_objfile
18333 = cu
->per_cu
->dwarf2_per_objfile
;
18335 int has_low_pc_attr
= 0;
18336 int has_high_pc_attr
= 0;
18337 int high_pc_relative
= 0;
18339 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18342 bool need_reprocess
;
18343 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18344 info_ptr
, &need_reprocess
);
18345 /* String and address offsets that need to do the reprocessing have
18346 already been read at this point, so there is no need to wait until
18347 the loop terminates to do the reprocessing. */
18348 if (need_reprocess
)
18349 read_attribute_reprocess (reader
, &attr
);
18350 /* Store the data if it is of an attribute we want to keep in a
18351 partial symbol table. */
18357 case DW_TAG_compile_unit
:
18358 case DW_TAG_partial_unit
:
18359 case DW_TAG_type_unit
:
18360 /* Compilation units have a DW_AT_name that is a filename, not
18361 a source language identifier. */
18362 case DW_TAG_enumeration_type
:
18363 case DW_TAG_enumerator
:
18364 /* These tags always have simple identifiers already; no need
18365 to canonicalize them. */
18366 name
= DW_STRING (&attr
);
18370 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18373 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18378 case DW_AT_linkage_name
:
18379 case DW_AT_MIPS_linkage_name
:
18380 /* Note that both forms of linkage name might appear. We
18381 assume they will be the same, and we only store the last
18383 linkage_name
= attr
.value_as_string ();
18384 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18385 See https://github.com/rust-lang/rust/issues/32925. */
18386 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18387 && strchr (linkage_name
, '{') != NULL
)
18388 linkage_name
= NULL
;
18391 has_low_pc_attr
= 1;
18392 lowpc
= attr
.value_as_address ();
18394 case DW_AT_high_pc
:
18395 has_high_pc_attr
= 1;
18396 highpc
= attr
.value_as_address ();
18397 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18398 high_pc_relative
= 1;
18400 case DW_AT_location
:
18401 /* Support the .debug_loc offsets. */
18402 if (attr
.form_is_block ())
18404 d
.locdesc
= DW_BLOCK (&attr
);
18406 else if (attr
.form_is_section_offset ())
18408 dwarf2_complex_location_expr_complaint ();
18412 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18413 "partial symbol information");
18416 case DW_AT_external
:
18417 is_external
= DW_UNSND (&attr
);
18419 case DW_AT_declaration
:
18420 is_declaration
= DW_UNSND (&attr
);
18425 case DW_AT_abstract_origin
:
18426 case DW_AT_specification
:
18427 case DW_AT_extension
:
18428 has_specification
= 1;
18429 spec_offset
= attr
.get_ref_die_offset ();
18430 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18431 || cu
->per_cu
->is_dwz
);
18433 case DW_AT_sibling
:
18434 /* Ignore absolute siblings, they might point outside of
18435 the current compile unit. */
18436 if (attr
.form
== DW_FORM_ref_addr
)
18437 complaint (_("ignoring absolute DW_AT_sibling"));
18440 const gdb_byte
*buffer
= reader
->buffer
;
18441 sect_offset off
= attr
.get_ref_die_offset ();
18442 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18444 if (sibling_ptr
< info_ptr
)
18445 complaint (_("DW_AT_sibling points backwards"));
18446 else if (sibling_ptr
> reader
->buffer_end
)
18447 reader
->die_section
->overflow_complaint ();
18449 sibling
= sibling_ptr
;
18452 case DW_AT_byte_size
:
18455 case DW_AT_const_value
:
18456 has_const_value
= 1;
18458 case DW_AT_calling_convention
:
18459 /* DWARF doesn't provide a way to identify a program's source-level
18460 entry point. DW_AT_calling_convention attributes are only meant
18461 to describe functions' calling conventions.
18463 However, because it's a necessary piece of information in
18464 Fortran, and before DWARF 4 DW_CC_program was the only
18465 piece of debugging information whose definition refers to
18466 a 'main program' at all, several compilers marked Fortran
18467 main programs with DW_CC_program --- even when those
18468 functions use the standard calling conventions.
18470 Although DWARF now specifies a way to provide this
18471 information, we support this practice for backward
18473 if (DW_UNSND (&attr
) == DW_CC_program
18474 && cu
->language
== language_fortran
)
18475 main_subprogram
= 1;
18478 if (DW_UNSND (&attr
) == DW_INL_inlined
18479 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18480 may_be_inlined
= 1;
18484 if (tag
== DW_TAG_imported_unit
)
18486 d
.sect_off
= attr
.get_ref_die_offset ();
18487 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18488 || cu
->per_cu
->is_dwz
);
18492 case DW_AT_main_subprogram
:
18493 main_subprogram
= DW_UNSND (&attr
);
18498 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18499 but that requires a full DIE, so instead we just
18501 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18502 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18503 + (need_ranges_base
18507 /* Value of the DW_AT_ranges attribute is the offset in the
18508 .debug_ranges section. */
18509 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18520 /* For Ada, if both the name and the linkage name appear, we prefer
18521 the latter. This lets "catch exception" work better, regardless
18522 of the order in which the name and linkage name were emitted.
18523 Really, though, this is just a workaround for the fact that gdb
18524 doesn't store both the name and the linkage name. */
18525 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18526 name
= linkage_name
;
18528 if (high_pc_relative
)
18531 if (has_low_pc_attr
&& has_high_pc_attr
)
18533 /* When using the GNU linker, .gnu.linkonce. sections are used to
18534 eliminate duplicate copies of functions and vtables and such.
18535 The linker will arbitrarily choose one and discard the others.
18536 The AT_*_pc values for such functions refer to local labels in
18537 these sections. If the section from that file was discarded, the
18538 labels are not in the output, so the relocs get a value of 0.
18539 If this is a discarded function, mark the pc bounds as invalid,
18540 so that GDB will ignore it. */
18541 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18543 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18544 struct gdbarch
*gdbarch
= objfile
->arch ();
18546 complaint (_("DW_AT_low_pc %s is zero "
18547 "for DIE at %s [in module %s]"),
18548 paddress (gdbarch
, lowpc
),
18549 sect_offset_str (sect_off
),
18550 objfile_name (objfile
));
18552 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18553 else if (lowpc
>= highpc
)
18555 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18556 struct gdbarch
*gdbarch
= objfile
->arch ();
18558 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18559 "for DIE at %s [in module %s]"),
18560 paddress (gdbarch
, lowpc
),
18561 paddress (gdbarch
, highpc
),
18562 sect_offset_str (sect_off
),
18563 objfile_name (objfile
));
18572 /* Find a cached partial DIE at OFFSET in CU. */
18574 struct partial_die_info
*
18575 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18577 struct partial_die_info
*lookup_die
= NULL
;
18578 struct partial_die_info
part_die (sect_off
);
18580 lookup_die
= ((struct partial_die_info
*)
18581 htab_find_with_hash (partial_dies
, &part_die
,
18582 to_underlying (sect_off
)));
18587 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18588 except in the case of .debug_types DIEs which do not reference
18589 outside their CU (they do however referencing other types via
18590 DW_FORM_ref_sig8). */
18592 static const struct cu_partial_die_info
18593 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18595 struct dwarf2_per_objfile
*dwarf2_per_objfile
18596 = cu
->per_cu
->dwarf2_per_objfile
;
18597 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18598 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18599 struct partial_die_info
*pd
= NULL
;
18601 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18602 && cu
->header
.offset_in_cu_p (sect_off
))
18604 pd
= cu
->find_partial_die (sect_off
);
18607 /* We missed recording what we needed.
18608 Load all dies and try again. */
18609 per_cu
= cu
->per_cu
;
18613 /* TUs don't reference other CUs/TUs (except via type signatures). */
18614 if (cu
->per_cu
->is_debug_types
)
18616 error (_("Dwarf Error: Type Unit at offset %s contains"
18617 " external reference to offset %s [in module %s].\n"),
18618 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18619 bfd_get_filename (objfile
->obfd
));
18621 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18622 dwarf2_per_objfile
);
18624 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18625 load_partial_comp_unit (per_cu
);
18627 per_cu
->cu
->last_used
= 0;
18628 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18631 /* If we didn't find it, and not all dies have been loaded,
18632 load them all and try again. */
18634 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18636 per_cu
->load_all_dies
= 1;
18638 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18639 THIS_CU->cu may already be in use. So we can't just free it and
18640 replace its DIEs with the ones we read in. Instead, we leave those
18641 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18642 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18644 load_partial_comp_unit (per_cu
);
18646 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18650 internal_error (__FILE__
, __LINE__
,
18651 _("could not find partial DIE %s "
18652 "in cache [from module %s]\n"),
18653 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18654 return { per_cu
->cu
, pd
};
18657 /* See if we can figure out if the class lives in a namespace. We do
18658 this by looking for a member function; its demangled name will
18659 contain namespace info, if there is any. */
18662 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18663 struct dwarf2_cu
*cu
)
18665 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18666 what template types look like, because the demangler
18667 frequently doesn't give the same name as the debug info. We
18668 could fix this by only using the demangled name to get the
18669 prefix (but see comment in read_structure_type). */
18671 struct partial_die_info
*real_pdi
;
18672 struct partial_die_info
*child_pdi
;
18674 /* If this DIE (this DIE's specification, if any) has a parent, then
18675 we should not do this. We'll prepend the parent's fully qualified
18676 name when we create the partial symbol. */
18678 real_pdi
= struct_pdi
;
18679 while (real_pdi
->has_specification
)
18681 auto res
= find_partial_die (real_pdi
->spec_offset
,
18682 real_pdi
->spec_is_dwz
, cu
);
18683 real_pdi
= res
.pdi
;
18687 if (real_pdi
->die_parent
!= NULL
)
18690 for (child_pdi
= struct_pdi
->die_child
;
18692 child_pdi
= child_pdi
->die_sibling
)
18694 if (child_pdi
->tag
== DW_TAG_subprogram
18695 && child_pdi
->linkage_name
!= NULL
)
18697 gdb::unique_xmalloc_ptr
<char> actual_class_name
18698 (language_class_name_from_physname (cu
->language_defn
,
18699 child_pdi
->linkage_name
));
18700 if (actual_class_name
!= NULL
)
18702 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18703 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18710 /* Return true if a DIE with TAG may have the DW_AT_const_value
18714 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18718 case DW_TAG_constant
:
18719 case DW_TAG_enumerator
:
18720 case DW_TAG_formal_parameter
:
18721 case DW_TAG_template_value_param
:
18722 case DW_TAG_variable
:
18730 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18732 /* Once we've fixed up a die, there's no point in doing so again.
18733 This also avoids a memory leak if we were to call
18734 guess_partial_die_structure_name multiple times. */
18738 /* If we found a reference attribute and the DIE has no name, try
18739 to find a name in the referred to DIE. */
18741 if (name
== NULL
&& has_specification
)
18743 struct partial_die_info
*spec_die
;
18745 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18746 spec_die
= res
.pdi
;
18749 spec_die
->fixup (cu
);
18751 if (spec_die
->name
)
18753 name
= spec_die
->name
;
18755 /* Copy DW_AT_external attribute if it is set. */
18756 if (spec_die
->is_external
)
18757 is_external
= spec_die
->is_external
;
18761 if (!has_const_value
&& has_specification
18762 && can_have_DW_AT_const_value_p (tag
))
18764 struct partial_die_info
*spec_die
;
18766 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18767 spec_die
= res
.pdi
;
18770 spec_die
->fixup (cu
);
18772 if (spec_die
->has_const_value
)
18774 /* Copy DW_AT_const_value attribute if it is set. */
18775 has_const_value
= spec_die
->has_const_value
;
18779 /* Set default names for some unnamed DIEs. */
18781 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18782 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18784 /* If there is no parent die to provide a namespace, and there are
18785 children, see if we can determine the namespace from their linkage
18787 if (cu
->language
== language_cplus
18788 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18789 && die_parent
== NULL
18791 && (tag
== DW_TAG_class_type
18792 || tag
== DW_TAG_structure_type
18793 || tag
== DW_TAG_union_type
))
18794 guess_partial_die_structure_name (this, cu
);
18796 /* GCC might emit a nameless struct or union that has a linkage
18797 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18799 && (tag
== DW_TAG_class_type
18800 || tag
== DW_TAG_interface_type
18801 || tag
== DW_TAG_structure_type
18802 || tag
== DW_TAG_union_type
)
18803 && linkage_name
!= NULL
)
18805 gdb::unique_xmalloc_ptr
<char> demangled
18806 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18807 if (demangled
!= nullptr)
18811 /* Strip any leading namespaces/classes, keep only the base name.
18812 DW_AT_name for named DIEs does not contain the prefixes. */
18813 base
= strrchr (demangled
.get (), ':');
18814 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18817 base
= demangled
.get ();
18819 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18820 name
= objfile
->intern (base
);
18827 /* Read the .debug_loclists header contents from the given SECTION in the
18830 read_loclist_header (struct loclist_header
*header
,
18831 struct dwarf2_section_info
*section
)
18833 unsigned int bytes_read
;
18834 bfd
*abfd
= section
->get_bfd_owner ();
18835 const gdb_byte
*info_ptr
= section
->buffer
;
18836 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18837 info_ptr
+= bytes_read
;
18838 header
->version
= read_2_bytes (abfd
, info_ptr
);
18840 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18842 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18844 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18847 /* Return the DW_AT_loclists_base value for the CU. */
18849 lookup_loclist_base (struct dwarf2_cu
*cu
)
18851 /* For the .dwo unit, the loclist_base points to the first offset following
18852 the header. The header consists of the following entities-
18853 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18855 2. version (2 bytes)
18856 3. address size (1 byte)
18857 4. segment selector size (1 byte)
18858 5. offset entry count (4 bytes)
18859 These sizes are derived as per the DWARFv5 standard. */
18860 if (cu
->dwo_unit
!= nullptr)
18862 if (cu
->header
.initial_length_size
== 4)
18863 return LOCLIST_HEADER_SIZE32
;
18864 return LOCLIST_HEADER_SIZE64
;
18866 return cu
->loclist_base
;
18869 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18870 array of offsets in the .debug_loclists section. */
18872 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18874 struct dwarf2_per_objfile
*dwarf2_per_objfile
18875 = cu
->per_cu
->dwarf2_per_objfile
;
18876 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18877 bfd
*abfd
= objfile
->obfd
;
18878 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18879 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18881 section
->read (objfile
);
18882 if (section
->buffer
== NULL
)
18883 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18884 "section [in module %s]"), objfile_name (objfile
));
18885 struct loclist_header header
;
18886 read_loclist_header (&header
, section
);
18887 if (loclist_index
>= header
.offset_entry_count
)
18888 complaint (_("DW_FORM_loclistx pointing outside of "
18889 ".debug_loclists offset array [in module %s]"),
18890 objfile_name (objfile
));
18891 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18893 complaint (_("DW_FORM_loclistx pointing outside of "
18894 ".debug_loclists section [in module %s]"),
18895 objfile_name (objfile
));
18896 const gdb_byte
*info_ptr
18897 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18899 if (cu
->header
.offset_size
== 4)
18900 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18902 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18905 /* Process the attributes that had to be skipped in the first round. These
18906 attributes are the ones that need str_offsets_base or addr_base attributes.
18907 They could not have been processed in the first round, because at the time
18908 the values of str_offsets_base or addr_base may not have been known. */
18910 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18911 struct attribute
*attr
)
18913 struct dwarf2_cu
*cu
= reader
->cu
;
18914 switch (attr
->form
)
18916 case DW_FORM_addrx
:
18917 case DW_FORM_GNU_addr_index
:
18918 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18920 case DW_FORM_loclistx
:
18921 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18924 case DW_FORM_strx1
:
18925 case DW_FORM_strx2
:
18926 case DW_FORM_strx3
:
18927 case DW_FORM_strx4
:
18928 case DW_FORM_GNU_str_index
:
18930 unsigned int str_index
= DW_UNSND (attr
);
18931 if (reader
->dwo_file
!= NULL
)
18933 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18934 DW_STRING_IS_CANONICAL (attr
) = 0;
18938 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18939 DW_STRING_IS_CANONICAL (attr
) = 0;
18944 gdb_assert_not_reached (_("Unexpected DWARF form."));
18948 /* Read an attribute value described by an attribute form. */
18950 static const gdb_byte
*
18951 read_attribute_value (const struct die_reader_specs
*reader
,
18952 struct attribute
*attr
, unsigned form
,
18953 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18954 bool *need_reprocess
)
18956 struct dwarf2_cu
*cu
= reader
->cu
;
18957 struct dwarf2_per_objfile
*dwarf2_per_objfile
18958 = cu
->per_cu
->dwarf2_per_objfile
;
18959 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18960 bfd
*abfd
= reader
->abfd
;
18961 struct comp_unit_head
*cu_header
= &cu
->header
;
18962 unsigned int bytes_read
;
18963 struct dwarf_block
*blk
;
18964 *need_reprocess
= false;
18966 attr
->form
= (enum dwarf_form
) form
;
18969 case DW_FORM_ref_addr
:
18970 if (cu
->header
.version
== 2)
18971 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18974 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18976 info_ptr
+= bytes_read
;
18978 case DW_FORM_GNU_ref_alt
:
18979 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18980 info_ptr
+= bytes_read
;
18984 struct gdbarch
*gdbarch
= objfile
->arch ();
18985 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18986 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18987 info_ptr
+= bytes_read
;
18990 case DW_FORM_block2
:
18991 blk
= dwarf_alloc_block (cu
);
18992 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18994 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18995 info_ptr
+= blk
->size
;
18996 DW_BLOCK (attr
) = blk
;
18998 case DW_FORM_block4
:
18999 blk
= dwarf_alloc_block (cu
);
19000 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19002 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19003 info_ptr
+= blk
->size
;
19004 DW_BLOCK (attr
) = blk
;
19006 case DW_FORM_data2
:
19007 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19010 case DW_FORM_data4
:
19011 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19014 case DW_FORM_data8
:
19015 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19018 case DW_FORM_data16
:
19019 blk
= dwarf_alloc_block (cu
);
19021 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19023 DW_BLOCK (attr
) = blk
;
19025 case DW_FORM_sec_offset
:
19026 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19027 info_ptr
+= bytes_read
;
19029 case DW_FORM_loclistx
:
19031 *need_reprocess
= true;
19032 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19033 info_ptr
+= bytes_read
;
19036 case DW_FORM_string
:
19037 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19038 DW_STRING_IS_CANONICAL (attr
) = 0;
19039 info_ptr
+= bytes_read
;
19042 if (!cu
->per_cu
->is_dwz
)
19044 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19045 abfd
, info_ptr
, cu_header
,
19047 DW_STRING_IS_CANONICAL (attr
) = 0;
19048 info_ptr
+= bytes_read
;
19052 case DW_FORM_line_strp
:
19053 if (!cu
->per_cu
->is_dwz
)
19056 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
19058 DW_STRING_IS_CANONICAL (attr
) = 0;
19059 info_ptr
+= bytes_read
;
19063 case DW_FORM_GNU_strp_alt
:
19065 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19066 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19069 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
19070 DW_STRING_IS_CANONICAL (attr
) = 0;
19071 info_ptr
+= bytes_read
;
19074 case DW_FORM_exprloc
:
19075 case DW_FORM_block
:
19076 blk
= dwarf_alloc_block (cu
);
19077 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19078 info_ptr
+= bytes_read
;
19079 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19080 info_ptr
+= blk
->size
;
19081 DW_BLOCK (attr
) = blk
;
19083 case DW_FORM_block1
:
19084 blk
= dwarf_alloc_block (cu
);
19085 blk
->size
= read_1_byte (abfd
, info_ptr
);
19087 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19088 info_ptr
+= blk
->size
;
19089 DW_BLOCK (attr
) = blk
;
19091 case DW_FORM_data1
:
19092 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19096 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19099 case DW_FORM_flag_present
:
19100 DW_UNSND (attr
) = 1;
19102 case DW_FORM_sdata
:
19103 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19104 info_ptr
+= bytes_read
;
19106 case DW_FORM_udata
:
19107 case DW_FORM_rnglistx
:
19108 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19109 info_ptr
+= bytes_read
;
19112 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19113 + read_1_byte (abfd
, info_ptr
));
19117 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19118 + read_2_bytes (abfd
, info_ptr
));
19122 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19123 + read_4_bytes (abfd
, info_ptr
));
19127 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19128 + read_8_bytes (abfd
, info_ptr
));
19131 case DW_FORM_ref_sig8
:
19132 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19135 case DW_FORM_ref_udata
:
19136 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19137 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19138 info_ptr
+= bytes_read
;
19140 case DW_FORM_indirect
:
19141 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19142 info_ptr
+= bytes_read
;
19143 if (form
== DW_FORM_implicit_const
)
19145 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19146 info_ptr
+= bytes_read
;
19148 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19149 info_ptr
, need_reprocess
);
19151 case DW_FORM_implicit_const
:
19152 DW_SND (attr
) = implicit_const
;
19154 case DW_FORM_addrx
:
19155 case DW_FORM_GNU_addr_index
:
19156 *need_reprocess
= true;
19157 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19158 info_ptr
+= bytes_read
;
19161 case DW_FORM_strx1
:
19162 case DW_FORM_strx2
:
19163 case DW_FORM_strx3
:
19164 case DW_FORM_strx4
:
19165 case DW_FORM_GNU_str_index
:
19167 ULONGEST str_index
;
19168 if (form
== DW_FORM_strx1
)
19170 str_index
= read_1_byte (abfd
, info_ptr
);
19173 else if (form
== DW_FORM_strx2
)
19175 str_index
= read_2_bytes (abfd
, info_ptr
);
19178 else if (form
== DW_FORM_strx3
)
19180 str_index
= read_3_bytes (abfd
, info_ptr
);
19183 else if (form
== DW_FORM_strx4
)
19185 str_index
= read_4_bytes (abfd
, info_ptr
);
19190 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19191 info_ptr
+= bytes_read
;
19193 *need_reprocess
= true;
19194 DW_UNSND (attr
) = str_index
;
19198 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19199 dwarf_form_name (form
),
19200 bfd_get_filename (abfd
));
19204 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19205 attr
->form
= DW_FORM_GNU_ref_alt
;
19207 /* We have seen instances where the compiler tried to emit a byte
19208 size attribute of -1 which ended up being encoded as an unsigned
19209 0xffffffff. Although 0xffffffff is technically a valid size value,
19210 an object of this size seems pretty unlikely so we can relatively
19211 safely treat these cases as if the size attribute was invalid and
19212 treat them as zero by default. */
19213 if (attr
->name
== DW_AT_byte_size
19214 && form
== DW_FORM_data4
19215 && DW_UNSND (attr
) >= 0xffffffff)
19218 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19219 hex_string (DW_UNSND (attr
)));
19220 DW_UNSND (attr
) = 0;
19226 /* Read an attribute described by an abbreviated attribute. */
19228 static const gdb_byte
*
19229 read_attribute (const struct die_reader_specs
*reader
,
19230 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19231 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19233 attr
->name
= abbrev
->name
;
19234 return read_attribute_value (reader
, attr
, abbrev
->form
,
19235 abbrev
->implicit_const
, info_ptr
,
19239 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19241 static const char *
19242 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19243 LONGEST str_offset
)
19245 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
19246 str_offset
, "DW_FORM_strp");
19249 /* Return pointer to string at .debug_str offset as read from BUF.
19250 BUF is assumed to be in a compilation unit described by CU_HEADER.
19251 Return *BYTES_READ_PTR count of bytes read from BUF. */
19253 static const char *
19254 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19255 const gdb_byte
*buf
,
19256 const struct comp_unit_head
*cu_header
,
19257 unsigned int *bytes_read_ptr
)
19259 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19261 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19267 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19268 const struct comp_unit_head
*cu_header
,
19269 unsigned int *bytes_read_ptr
)
19271 bfd
*abfd
= objfile
->obfd
;
19272 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19274 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19277 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19278 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19279 ADDR_SIZE is the size of addresses from the CU header. */
19282 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19283 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19286 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19287 bfd
*abfd
= objfile
->obfd
;
19288 const gdb_byte
*info_ptr
;
19289 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19291 dwarf2_per_objfile
->addr
.read (objfile
);
19292 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19293 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19294 objfile_name (objfile
));
19295 if (addr_base_or_zero
+ addr_index
* addr_size
19296 >= dwarf2_per_objfile
->addr
.size
)
19297 error (_("DW_FORM_addr_index pointing outside of "
19298 ".debug_addr section [in module %s]"),
19299 objfile_name (objfile
));
19300 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19301 + addr_base_or_zero
+ addr_index
* addr_size
);
19302 if (addr_size
== 4)
19303 return bfd_get_32 (abfd
, info_ptr
);
19305 return bfd_get_64 (abfd
, info_ptr
);
19308 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19311 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19313 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19314 cu
->addr_base
, cu
->header
.addr_size
);
19317 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19320 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19321 unsigned int *bytes_read
)
19323 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19324 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19326 return read_addr_index (cu
, addr_index
);
19332 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19334 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19335 struct dwarf2_cu
*cu
= per_cu
->cu
;
19336 gdb::optional
<ULONGEST
> addr_base
;
19339 /* We need addr_base and addr_size.
19340 If we don't have PER_CU->cu, we have to get it.
19341 Nasty, but the alternative is storing the needed info in PER_CU,
19342 which at this point doesn't seem justified: it's not clear how frequently
19343 it would get used and it would increase the size of every PER_CU.
19344 Entry points like dwarf2_per_cu_addr_size do a similar thing
19345 so we're not in uncharted territory here.
19346 Alas we need to be a bit more complicated as addr_base is contained
19349 We don't need to read the entire CU(/TU).
19350 We just need the header and top level die.
19352 IWBN to use the aging mechanism to let us lazily later discard the CU.
19353 For now we skip this optimization. */
19357 addr_base
= cu
->addr_base
;
19358 addr_size
= cu
->header
.addr_size
;
19362 cutu_reader
reader (per_cu
, NULL
, 0, false);
19363 addr_base
= reader
.cu
->addr_base
;
19364 addr_size
= reader
.cu
->header
.addr_size
;
19367 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19371 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19372 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19375 static const char *
19376 read_str_index (struct dwarf2_cu
*cu
,
19377 struct dwarf2_section_info
*str_section
,
19378 struct dwarf2_section_info
*str_offsets_section
,
19379 ULONGEST str_offsets_base
, ULONGEST str_index
)
19381 struct dwarf2_per_objfile
*dwarf2_per_objfile
19382 = cu
->per_cu
->dwarf2_per_objfile
;
19383 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19384 const char *objf_name
= objfile_name (objfile
);
19385 bfd
*abfd
= objfile
->obfd
;
19386 const gdb_byte
*info_ptr
;
19387 ULONGEST str_offset
;
19388 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19390 str_section
->read (objfile
);
19391 str_offsets_section
->read (objfile
);
19392 if (str_section
->buffer
== NULL
)
19393 error (_("%s used without %s section"
19394 " in CU at offset %s [in module %s]"),
19395 form_name
, str_section
->get_name (),
19396 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19397 if (str_offsets_section
->buffer
== NULL
)
19398 error (_("%s used without %s section"
19399 " in CU at offset %s [in module %s]"),
19400 form_name
, str_section
->get_name (),
19401 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19402 info_ptr
= (str_offsets_section
->buffer
19404 + str_index
* cu
->header
.offset_size
);
19405 if (cu
->header
.offset_size
== 4)
19406 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19408 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19409 if (str_offset
>= str_section
->size
)
19410 error (_("Offset from %s pointing outside of"
19411 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19412 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19413 return (const char *) (str_section
->buffer
+ str_offset
);
19416 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19418 static const char *
19419 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19421 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19422 ? reader
->cu
->header
.addr_size
: 0;
19423 return read_str_index (reader
->cu
,
19424 &reader
->dwo_file
->sections
.str
,
19425 &reader
->dwo_file
->sections
.str_offsets
,
19426 str_offsets_base
, str_index
);
19429 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19431 static const char *
19432 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19434 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19435 const char *objf_name
= objfile_name (objfile
);
19436 static const char form_name
[] = "DW_FORM_GNU_str_index";
19437 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19439 if (!cu
->str_offsets_base
.has_value ())
19440 error (_("%s used in Fission stub without %s"
19441 " in CU at offset 0x%lx [in module %s]"),
19442 form_name
, str_offsets_attr_name
,
19443 (long) cu
->header
.offset_size
, objf_name
);
19445 return read_str_index (cu
,
19446 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19447 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19448 *cu
->str_offsets_base
, str_index
);
19451 /* Return the length of an LEB128 number in BUF. */
19454 leb128_size (const gdb_byte
*buf
)
19456 const gdb_byte
*begin
= buf
;
19462 if ((byte
& 128) == 0)
19463 return buf
- begin
;
19468 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19477 cu
->language
= language_c
;
19480 case DW_LANG_C_plus_plus
:
19481 case DW_LANG_C_plus_plus_11
:
19482 case DW_LANG_C_plus_plus_14
:
19483 cu
->language
= language_cplus
;
19486 cu
->language
= language_d
;
19488 case DW_LANG_Fortran77
:
19489 case DW_LANG_Fortran90
:
19490 case DW_LANG_Fortran95
:
19491 case DW_LANG_Fortran03
:
19492 case DW_LANG_Fortran08
:
19493 cu
->language
= language_fortran
;
19496 cu
->language
= language_go
;
19498 case DW_LANG_Mips_Assembler
:
19499 cu
->language
= language_asm
;
19501 case DW_LANG_Ada83
:
19502 case DW_LANG_Ada95
:
19503 cu
->language
= language_ada
;
19505 case DW_LANG_Modula2
:
19506 cu
->language
= language_m2
;
19508 case DW_LANG_Pascal83
:
19509 cu
->language
= language_pascal
;
19512 cu
->language
= language_objc
;
19515 case DW_LANG_Rust_old
:
19516 cu
->language
= language_rust
;
19518 case DW_LANG_Cobol74
:
19519 case DW_LANG_Cobol85
:
19521 cu
->language
= language_minimal
;
19524 cu
->language_defn
= language_def (cu
->language
);
19527 /* Return the named attribute or NULL if not there. */
19529 static struct attribute
*
19530 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19535 struct attribute
*spec
= NULL
;
19537 for (i
= 0; i
< die
->num_attrs
; ++i
)
19539 if (die
->attrs
[i
].name
== name
)
19540 return &die
->attrs
[i
];
19541 if (die
->attrs
[i
].name
== DW_AT_specification
19542 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19543 spec
= &die
->attrs
[i
];
19549 die
= follow_die_ref (die
, spec
, &cu
);
19555 /* Return the string associated with a string-typed attribute, or NULL if it
19556 is either not found or is of an incorrect type. */
19558 static const char *
19559 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19561 struct attribute
*attr
;
19562 const char *str
= NULL
;
19564 attr
= dwarf2_attr (die
, name
, cu
);
19568 str
= attr
->value_as_string ();
19569 if (str
== nullptr)
19570 complaint (_("string type expected for attribute %s for "
19571 "DIE at %s in module %s"),
19572 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19573 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19579 /* Return the dwo name or NULL if not present. If present, it is in either
19580 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19581 static const char *
19582 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19584 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19585 if (dwo_name
== nullptr)
19586 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19590 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19591 and holds a non-zero value. This function should only be used for
19592 DW_FORM_flag or DW_FORM_flag_present attributes. */
19595 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19597 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19599 return (attr
&& DW_UNSND (attr
));
19603 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19605 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19606 which value is non-zero. However, we have to be careful with
19607 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19608 (via dwarf2_flag_true_p) follows this attribute. So we may
19609 end up accidently finding a declaration attribute that belongs
19610 to a different DIE referenced by the specification attribute,
19611 even though the given DIE does not have a declaration attribute. */
19612 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19613 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19616 /* Return the die giving the specification for DIE, if there is
19617 one. *SPEC_CU is the CU containing DIE on input, and the CU
19618 containing the return value on output. If there is no
19619 specification, but there is an abstract origin, that is
19622 static struct die_info
*
19623 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19625 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19628 if (spec_attr
== NULL
)
19629 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19631 if (spec_attr
== NULL
)
19634 return follow_die_ref (die
, spec_attr
, spec_cu
);
19637 /* Stub for free_line_header to match void * callback types. */
19640 free_line_header_voidp (void *arg
)
19642 struct line_header
*lh
= (struct line_header
*) arg
;
19647 /* A convenience function to find the proper .debug_line section for a CU. */
19649 static struct dwarf2_section_info
*
19650 get_debug_line_section (struct dwarf2_cu
*cu
)
19652 struct dwarf2_section_info
*section
;
19653 struct dwarf2_per_objfile
*dwarf2_per_objfile
19654 = cu
->per_cu
->dwarf2_per_objfile
;
19656 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19658 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19659 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19660 else if (cu
->per_cu
->is_dwz
)
19662 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19664 section
= &dwz
->line
;
19667 section
= &dwarf2_per_objfile
->line
;
19672 /* Read the statement program header starting at OFFSET in
19673 .debug_line, or .debug_line.dwo. Return a pointer
19674 to a struct line_header, allocated using xmalloc.
19675 Returns NULL if there is a problem reading the header, e.g., if it
19676 has a version we don't understand.
19678 NOTE: the strings in the include directory and file name tables of
19679 the returned object point into the dwarf line section buffer,
19680 and must not be freed. */
19682 static line_header_up
19683 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19685 struct dwarf2_section_info
*section
;
19686 struct dwarf2_per_objfile
*dwarf2_per_objfile
19687 = cu
->per_cu
->dwarf2_per_objfile
;
19689 section
= get_debug_line_section (cu
);
19690 section
->read (dwarf2_per_objfile
->objfile
);
19691 if (section
->buffer
== NULL
)
19693 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19694 complaint (_("missing .debug_line.dwo section"));
19696 complaint (_("missing .debug_line section"));
19700 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19701 dwarf2_per_objfile
, section
,
19705 /* Subroutine of dwarf_decode_lines to simplify it.
19706 Return the file name of the psymtab for the given file_entry.
19707 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19708 If space for the result is malloc'd, *NAME_HOLDER will be set.
19709 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19711 static const char *
19712 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19713 const dwarf2_psymtab
*pst
,
19714 const char *comp_dir
,
19715 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19717 const char *include_name
= fe
.name
;
19718 const char *include_name_to_compare
= include_name
;
19719 const char *pst_filename
;
19722 const char *dir_name
= fe
.include_dir (lh
);
19724 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19725 if (!IS_ABSOLUTE_PATH (include_name
)
19726 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19728 /* Avoid creating a duplicate psymtab for PST.
19729 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19730 Before we do the comparison, however, we need to account
19731 for DIR_NAME and COMP_DIR.
19732 First prepend dir_name (if non-NULL). If we still don't
19733 have an absolute path prepend comp_dir (if non-NULL).
19734 However, the directory we record in the include-file's
19735 psymtab does not contain COMP_DIR (to match the
19736 corresponding symtab(s)).
19741 bash$ gcc -g ./hello.c
19742 include_name = "hello.c"
19744 DW_AT_comp_dir = comp_dir = "/tmp"
19745 DW_AT_name = "./hello.c"
19749 if (dir_name
!= NULL
)
19751 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19752 include_name
, (char *) NULL
));
19753 include_name
= name_holder
->get ();
19754 include_name_to_compare
= include_name
;
19756 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19758 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19759 include_name
, (char *) NULL
));
19760 include_name_to_compare
= hold_compare
.get ();
19764 pst_filename
= pst
->filename
;
19765 gdb::unique_xmalloc_ptr
<char> copied_name
;
19766 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19768 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19769 pst_filename
, (char *) NULL
));
19770 pst_filename
= copied_name
.get ();
19773 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19777 return include_name
;
19780 /* State machine to track the state of the line number program. */
19782 class lnp_state_machine
19785 /* Initialize a machine state for the start of a line number
19787 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19788 bool record_lines_p
);
19790 file_entry
*current_file ()
19792 /* lh->file_names is 0-based, but the file name numbers in the
19793 statement program are 1-based. */
19794 return m_line_header
->file_name_at (m_file
);
19797 /* Record the line in the state machine. END_SEQUENCE is true if
19798 we're processing the end of a sequence. */
19799 void record_line (bool end_sequence
);
19801 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19802 nop-out rest of the lines in this sequence. */
19803 void check_line_address (struct dwarf2_cu
*cu
,
19804 const gdb_byte
*line_ptr
,
19805 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19807 void handle_set_discriminator (unsigned int discriminator
)
19809 m_discriminator
= discriminator
;
19810 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19813 /* Handle DW_LNE_set_address. */
19814 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19817 address
+= baseaddr
;
19818 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19821 /* Handle DW_LNS_advance_pc. */
19822 void handle_advance_pc (CORE_ADDR adjust
);
19824 /* Handle a special opcode. */
19825 void handle_special_opcode (unsigned char op_code
);
19827 /* Handle DW_LNS_advance_line. */
19828 void handle_advance_line (int line_delta
)
19830 advance_line (line_delta
);
19833 /* Handle DW_LNS_set_file. */
19834 void handle_set_file (file_name_index file
);
19836 /* Handle DW_LNS_negate_stmt. */
19837 void handle_negate_stmt ()
19839 m_is_stmt
= !m_is_stmt
;
19842 /* Handle DW_LNS_const_add_pc. */
19843 void handle_const_add_pc ();
19845 /* Handle DW_LNS_fixed_advance_pc. */
19846 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19848 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19852 /* Handle DW_LNS_copy. */
19853 void handle_copy ()
19855 record_line (false);
19856 m_discriminator
= 0;
19859 /* Handle DW_LNE_end_sequence. */
19860 void handle_end_sequence ()
19862 m_currently_recording_lines
= true;
19866 /* Advance the line by LINE_DELTA. */
19867 void advance_line (int line_delta
)
19869 m_line
+= line_delta
;
19871 if (line_delta
!= 0)
19872 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19875 struct dwarf2_cu
*m_cu
;
19877 gdbarch
*m_gdbarch
;
19879 /* True if we're recording lines.
19880 Otherwise we're building partial symtabs and are just interested in
19881 finding include files mentioned by the line number program. */
19882 bool m_record_lines_p
;
19884 /* The line number header. */
19885 line_header
*m_line_header
;
19887 /* These are part of the standard DWARF line number state machine,
19888 and initialized according to the DWARF spec. */
19890 unsigned char m_op_index
= 0;
19891 /* The line table index of the current file. */
19892 file_name_index m_file
= 1;
19893 unsigned int m_line
= 1;
19895 /* These are initialized in the constructor. */
19897 CORE_ADDR m_address
;
19899 unsigned int m_discriminator
;
19901 /* Additional bits of state we need to track. */
19903 /* The last file that we called dwarf2_start_subfile for.
19904 This is only used for TLLs. */
19905 unsigned int m_last_file
= 0;
19906 /* The last file a line number was recorded for. */
19907 struct subfile
*m_last_subfile
= NULL
;
19909 /* When true, record the lines we decode. */
19910 bool m_currently_recording_lines
= false;
19912 /* The last line number that was recorded, used to coalesce
19913 consecutive entries for the same line. This can happen, for
19914 example, when discriminators are present. PR 17276. */
19915 unsigned int m_last_line
= 0;
19916 bool m_line_has_non_zero_discriminator
= false;
19920 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19922 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19923 / m_line_header
->maximum_ops_per_instruction
)
19924 * m_line_header
->minimum_instruction_length
);
19925 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19926 m_op_index
= ((m_op_index
+ adjust
)
19927 % m_line_header
->maximum_ops_per_instruction
);
19931 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19933 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19934 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19935 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19936 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19937 / m_line_header
->maximum_ops_per_instruction
)
19938 * m_line_header
->minimum_instruction_length
);
19939 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19940 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19941 % m_line_header
->maximum_ops_per_instruction
);
19943 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19944 advance_line (line_delta
);
19945 record_line (false);
19946 m_discriminator
= 0;
19950 lnp_state_machine::handle_set_file (file_name_index file
)
19954 const file_entry
*fe
= current_file ();
19956 dwarf2_debug_line_missing_file_complaint ();
19957 else if (m_record_lines_p
)
19959 const char *dir
= fe
->include_dir (m_line_header
);
19961 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19962 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19963 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19968 lnp_state_machine::handle_const_add_pc ()
19971 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19974 = (((m_op_index
+ adjust
)
19975 / m_line_header
->maximum_ops_per_instruction
)
19976 * m_line_header
->minimum_instruction_length
);
19978 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19979 m_op_index
= ((m_op_index
+ adjust
)
19980 % m_line_header
->maximum_ops_per_instruction
);
19983 /* Return non-zero if we should add LINE to the line number table.
19984 LINE is the line to add, LAST_LINE is the last line that was added,
19985 LAST_SUBFILE is the subfile for LAST_LINE.
19986 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19987 had a non-zero discriminator.
19989 We have to be careful in the presence of discriminators.
19990 E.g., for this line:
19992 for (i = 0; i < 100000; i++);
19994 clang can emit four line number entries for that one line,
19995 each with a different discriminator.
19996 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19998 However, we want gdb to coalesce all four entries into one.
19999 Otherwise the user could stepi into the middle of the line and
20000 gdb would get confused about whether the pc really was in the
20001 middle of the line.
20003 Things are further complicated by the fact that two consecutive
20004 line number entries for the same line is a heuristic used by gcc
20005 to denote the end of the prologue. So we can't just discard duplicate
20006 entries, we have to be selective about it. The heuristic we use is
20007 that we only collapse consecutive entries for the same line if at least
20008 one of those entries has a non-zero discriminator. PR 17276.
20010 Note: Addresses in the line number state machine can never go backwards
20011 within one sequence, thus this coalescing is ok. */
20014 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20015 unsigned int line
, unsigned int last_line
,
20016 int line_has_non_zero_discriminator
,
20017 struct subfile
*last_subfile
)
20019 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20021 if (line
!= last_line
)
20023 /* Same line for the same file that we've seen already.
20024 As a last check, for pr 17276, only record the line if the line
20025 has never had a non-zero discriminator. */
20026 if (!line_has_non_zero_discriminator
)
20031 /* Use the CU's builder to record line number LINE beginning at
20032 address ADDRESS in the line table of subfile SUBFILE. */
20035 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20036 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20037 struct dwarf2_cu
*cu
)
20039 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20041 if (dwarf_line_debug
)
20043 fprintf_unfiltered (gdb_stdlog
,
20044 "Recording line %u, file %s, address %s\n",
20045 line
, lbasename (subfile
->name
),
20046 paddress (gdbarch
, address
));
20050 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20053 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20054 Mark the end of a set of line number records.
20055 The arguments are the same as for dwarf_record_line_1.
20056 If SUBFILE is NULL the request is ignored. */
20059 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20060 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20062 if (subfile
== NULL
)
20065 if (dwarf_line_debug
)
20067 fprintf_unfiltered (gdb_stdlog
,
20068 "Finishing current line, file %s, address %s\n",
20069 lbasename (subfile
->name
),
20070 paddress (gdbarch
, address
));
20073 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20077 lnp_state_machine::record_line (bool end_sequence
)
20079 if (dwarf_line_debug
)
20081 fprintf_unfiltered (gdb_stdlog
,
20082 "Processing actual line %u: file %u,"
20083 " address %s, is_stmt %u, discrim %u%s\n",
20085 paddress (m_gdbarch
, m_address
),
20086 m_is_stmt
, m_discriminator
,
20087 (end_sequence
? "\t(end sequence)" : ""));
20090 file_entry
*fe
= current_file ();
20093 dwarf2_debug_line_missing_file_complaint ();
20094 /* For now we ignore lines not starting on an instruction boundary.
20095 But not when processing end_sequence for compatibility with the
20096 previous version of the code. */
20097 else if (m_op_index
== 0 || end_sequence
)
20099 fe
->included_p
= 1;
20100 if (m_record_lines_p
)
20102 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20105 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20106 m_currently_recording_lines
? m_cu
: nullptr);
20111 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20113 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20114 m_line_has_non_zero_discriminator
,
20117 buildsym_compunit
*builder
= m_cu
->get_builder ();
20118 dwarf_record_line_1 (m_gdbarch
,
20119 builder
->get_current_subfile (),
20120 m_line
, m_address
, is_stmt
,
20121 m_currently_recording_lines
? m_cu
: nullptr);
20123 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20124 m_last_line
= m_line
;
20130 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20131 line_header
*lh
, bool record_lines_p
)
20135 m_record_lines_p
= record_lines_p
;
20136 m_line_header
= lh
;
20138 m_currently_recording_lines
= true;
20140 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20141 was a line entry for it so that the backend has a chance to adjust it
20142 and also record it in case it needs it. This is currently used by MIPS
20143 code, cf. `mips_adjust_dwarf2_line'. */
20144 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20145 m_is_stmt
= lh
->default_is_stmt
;
20146 m_discriminator
= 0;
20150 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20151 const gdb_byte
*line_ptr
,
20152 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20154 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20155 the pc range of the CU. However, we restrict the test to only ADDRESS
20156 values of zero to preserve GDB's previous behaviour which is to handle
20157 the specific case of a function being GC'd by the linker. */
20159 if (address
== 0 && address
< unrelocated_lowpc
)
20161 /* This line table is for a function which has been
20162 GCd by the linker. Ignore it. PR gdb/12528 */
20164 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20165 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20167 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20168 line_offset
, objfile_name (objfile
));
20169 m_currently_recording_lines
= false;
20170 /* Note: m_currently_recording_lines is left as false until we see
20171 DW_LNE_end_sequence. */
20175 /* Subroutine of dwarf_decode_lines to simplify it.
20176 Process the line number information in LH.
20177 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20178 program in order to set included_p for every referenced header. */
20181 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20182 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20184 const gdb_byte
*line_ptr
, *extended_end
;
20185 const gdb_byte
*line_end
;
20186 unsigned int bytes_read
, extended_len
;
20187 unsigned char op_code
, extended_op
;
20188 CORE_ADDR baseaddr
;
20189 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20190 bfd
*abfd
= objfile
->obfd
;
20191 struct gdbarch
*gdbarch
= objfile
->arch ();
20192 /* True if we're recording line info (as opposed to building partial
20193 symtabs and just interested in finding include files mentioned by
20194 the line number program). */
20195 bool record_lines_p
= !decode_for_pst_p
;
20197 baseaddr
= objfile
->text_section_offset ();
20199 line_ptr
= lh
->statement_program_start
;
20200 line_end
= lh
->statement_program_end
;
20202 /* Read the statement sequences until there's nothing left. */
20203 while (line_ptr
< line_end
)
20205 /* The DWARF line number program state machine. Reset the state
20206 machine at the start of each sequence. */
20207 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20208 bool end_sequence
= false;
20210 if (record_lines_p
)
20212 /* Start a subfile for the current file of the state
20214 const file_entry
*fe
= state_machine
.current_file ();
20217 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20220 /* Decode the table. */
20221 while (line_ptr
< line_end
&& !end_sequence
)
20223 op_code
= read_1_byte (abfd
, line_ptr
);
20226 if (op_code
>= lh
->opcode_base
)
20228 /* Special opcode. */
20229 state_machine
.handle_special_opcode (op_code
);
20231 else switch (op_code
)
20233 case DW_LNS_extended_op
:
20234 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20236 line_ptr
+= bytes_read
;
20237 extended_end
= line_ptr
+ extended_len
;
20238 extended_op
= read_1_byte (abfd
, line_ptr
);
20240 switch (extended_op
)
20242 case DW_LNE_end_sequence
:
20243 state_machine
.handle_end_sequence ();
20244 end_sequence
= true;
20246 case DW_LNE_set_address
:
20249 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20250 line_ptr
+= bytes_read
;
20252 state_machine
.check_line_address (cu
, line_ptr
,
20253 lowpc
- baseaddr
, address
);
20254 state_machine
.handle_set_address (baseaddr
, address
);
20257 case DW_LNE_define_file
:
20259 const char *cur_file
;
20260 unsigned int mod_time
, length
;
20263 cur_file
= read_direct_string (abfd
, line_ptr
,
20265 line_ptr
+= bytes_read
;
20266 dindex
= (dir_index
)
20267 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20268 line_ptr
+= bytes_read
;
20270 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20271 line_ptr
+= bytes_read
;
20273 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20274 line_ptr
+= bytes_read
;
20275 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20278 case DW_LNE_set_discriminator
:
20280 /* The discriminator is not interesting to the
20281 debugger; just ignore it. We still need to
20282 check its value though:
20283 if there are consecutive entries for the same
20284 (non-prologue) line we want to coalesce them.
20287 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20288 line_ptr
+= bytes_read
;
20290 state_machine
.handle_set_discriminator (discr
);
20294 complaint (_("mangled .debug_line section"));
20297 /* Make sure that we parsed the extended op correctly. If e.g.
20298 we expected a different address size than the producer used,
20299 we may have read the wrong number of bytes. */
20300 if (line_ptr
!= extended_end
)
20302 complaint (_("mangled .debug_line section"));
20307 state_machine
.handle_copy ();
20309 case DW_LNS_advance_pc
:
20312 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20313 line_ptr
+= bytes_read
;
20315 state_machine
.handle_advance_pc (adjust
);
20318 case DW_LNS_advance_line
:
20321 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20322 line_ptr
+= bytes_read
;
20324 state_machine
.handle_advance_line (line_delta
);
20327 case DW_LNS_set_file
:
20329 file_name_index file
20330 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20332 line_ptr
+= bytes_read
;
20334 state_machine
.handle_set_file (file
);
20337 case DW_LNS_set_column
:
20338 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20339 line_ptr
+= bytes_read
;
20341 case DW_LNS_negate_stmt
:
20342 state_machine
.handle_negate_stmt ();
20344 case DW_LNS_set_basic_block
:
20346 /* Add to the address register of the state machine the
20347 address increment value corresponding to special opcode
20348 255. I.e., this value is scaled by the minimum
20349 instruction length since special opcode 255 would have
20350 scaled the increment. */
20351 case DW_LNS_const_add_pc
:
20352 state_machine
.handle_const_add_pc ();
20354 case DW_LNS_fixed_advance_pc
:
20356 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20359 state_machine
.handle_fixed_advance_pc (addr_adj
);
20364 /* Unknown standard opcode, ignore it. */
20367 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20369 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20370 line_ptr
+= bytes_read
;
20377 dwarf2_debug_line_missing_end_sequence_complaint ();
20379 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20380 in which case we still finish recording the last line). */
20381 state_machine
.record_line (true);
20385 /* Decode the Line Number Program (LNP) for the given line_header
20386 structure and CU. The actual information extracted and the type
20387 of structures created from the LNP depends on the value of PST.
20389 1. If PST is NULL, then this procedure uses the data from the program
20390 to create all necessary symbol tables, and their linetables.
20392 2. If PST is not NULL, this procedure reads the program to determine
20393 the list of files included by the unit represented by PST, and
20394 builds all the associated partial symbol tables.
20396 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20397 It is used for relative paths in the line table.
20398 NOTE: When processing partial symtabs (pst != NULL),
20399 comp_dir == pst->dirname.
20401 NOTE: It is important that psymtabs have the same file name (via strcmp)
20402 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20403 symtab we don't use it in the name of the psymtabs we create.
20404 E.g. expand_line_sal requires this when finding psymtabs to expand.
20405 A good testcase for this is mb-inline.exp.
20407 LOWPC is the lowest address in CU (or 0 if not known).
20409 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20410 for its PC<->lines mapping information. Otherwise only the filename
20411 table is read in. */
20414 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20415 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20416 CORE_ADDR lowpc
, int decode_mapping
)
20418 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20419 const int decode_for_pst_p
= (pst
!= NULL
);
20421 if (decode_mapping
)
20422 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20424 if (decode_for_pst_p
)
20426 /* Now that we're done scanning the Line Header Program, we can
20427 create the psymtab of each included file. */
20428 for (auto &file_entry
: lh
->file_names ())
20429 if (file_entry
.included_p
== 1)
20431 gdb::unique_xmalloc_ptr
<char> name_holder
;
20432 const char *include_name
=
20433 psymtab_include_file_name (lh
, file_entry
, pst
,
20434 comp_dir
, &name_holder
);
20435 if (include_name
!= NULL
)
20436 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20441 /* Make sure a symtab is created for every file, even files
20442 which contain only variables (i.e. no code with associated
20444 buildsym_compunit
*builder
= cu
->get_builder ();
20445 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20447 for (auto &fe
: lh
->file_names ())
20449 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20450 if (builder
->get_current_subfile ()->symtab
== NULL
)
20452 builder
->get_current_subfile ()->symtab
20453 = allocate_symtab (cust
,
20454 builder
->get_current_subfile ()->name
);
20456 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20461 /* Start a subfile for DWARF. FILENAME is the name of the file and
20462 DIRNAME the name of the source directory which contains FILENAME
20463 or NULL if not known.
20464 This routine tries to keep line numbers from identical absolute and
20465 relative file names in a common subfile.
20467 Using the `list' example from the GDB testsuite, which resides in
20468 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20469 of /srcdir/list0.c yields the following debugging information for list0.c:
20471 DW_AT_name: /srcdir/list0.c
20472 DW_AT_comp_dir: /compdir
20473 files.files[0].name: list0.h
20474 files.files[0].dir: /srcdir
20475 files.files[1].name: list0.c
20476 files.files[1].dir: /srcdir
20478 The line number information for list0.c has to end up in a single
20479 subfile, so that `break /srcdir/list0.c:1' works as expected.
20480 start_subfile will ensure that this happens provided that we pass the
20481 concatenation of files.files[1].dir and files.files[1].name as the
20485 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20486 const char *dirname
)
20488 gdb::unique_xmalloc_ptr
<char> copy
;
20490 /* In order not to lose the line information directory,
20491 we concatenate it to the filename when it makes sense.
20492 Note that the Dwarf3 standard says (speaking of filenames in line
20493 information): ``The directory index is ignored for file names
20494 that represent full path names''. Thus ignoring dirname in the
20495 `else' branch below isn't an issue. */
20497 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20499 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20500 filename
= copy
.get ();
20503 cu
->get_builder ()->start_subfile (filename
);
20506 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20507 buildsym_compunit constructor. */
20509 struct compunit_symtab
*
20510 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20513 gdb_assert (m_builder
== nullptr);
20515 m_builder
.reset (new struct buildsym_compunit
20516 (per_cu
->dwarf2_per_objfile
->objfile
,
20517 name
, comp_dir
, language
, low_pc
));
20519 list_in_scope
= get_builder ()->get_file_symbols ();
20521 get_builder ()->record_debugformat ("DWARF 2");
20522 get_builder ()->record_producer (producer
);
20524 processing_has_namespace_info
= false;
20526 return get_builder ()->get_compunit_symtab ();
20530 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20531 struct dwarf2_cu
*cu
)
20533 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20534 struct comp_unit_head
*cu_header
= &cu
->header
;
20536 /* NOTE drow/2003-01-30: There used to be a comment and some special
20537 code here to turn a symbol with DW_AT_external and a
20538 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20539 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20540 with some versions of binutils) where shared libraries could have
20541 relocations against symbols in their debug information - the
20542 minimal symbol would have the right address, but the debug info
20543 would not. It's no longer necessary, because we will explicitly
20544 apply relocations when we read in the debug information now. */
20546 /* A DW_AT_location attribute with no contents indicates that a
20547 variable has been optimized away. */
20548 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20550 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20554 /* Handle one degenerate form of location expression specially, to
20555 preserve GDB's previous behavior when section offsets are
20556 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20557 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20559 if (attr
->form_is_block ()
20560 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20561 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20562 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20563 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20564 && (DW_BLOCK (attr
)->size
20565 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20567 unsigned int dummy
;
20569 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20570 SET_SYMBOL_VALUE_ADDRESS
20571 (sym
, cu
->header
.read_address (objfile
->obfd
,
20572 DW_BLOCK (attr
)->data
+ 1,
20575 SET_SYMBOL_VALUE_ADDRESS
20576 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20578 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20579 fixup_symbol_section (sym
, objfile
);
20580 SET_SYMBOL_VALUE_ADDRESS
20582 SYMBOL_VALUE_ADDRESS (sym
)
20583 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20587 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20588 expression evaluator, and use LOC_COMPUTED only when necessary
20589 (i.e. when the value of a register or memory location is
20590 referenced, or a thread-local block, etc.). Then again, it might
20591 not be worthwhile. I'm assuming that it isn't unless performance
20592 or memory numbers show me otherwise. */
20594 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20596 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20597 cu
->has_loclist
= true;
20600 /* Given a pointer to a DWARF information entry, figure out if we need
20601 to make a symbol table entry for it, and if so, create a new entry
20602 and return a pointer to it.
20603 If TYPE is NULL, determine symbol type from the die, otherwise
20604 used the passed type.
20605 If SPACE is not NULL, use it to hold the new symbol. If it is
20606 NULL, allocate a new symbol on the objfile's obstack. */
20608 static struct symbol
*
20609 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20610 struct symbol
*space
)
20612 struct dwarf2_per_objfile
*dwarf2_per_objfile
20613 = cu
->per_cu
->dwarf2_per_objfile
;
20614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20615 struct gdbarch
*gdbarch
= objfile
->arch ();
20616 struct symbol
*sym
= NULL
;
20618 struct attribute
*attr
= NULL
;
20619 struct attribute
*attr2
= NULL
;
20620 CORE_ADDR baseaddr
;
20621 struct pending
**list_to_add
= NULL
;
20623 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20625 baseaddr
= objfile
->text_section_offset ();
20627 name
= dwarf2_name (die
, cu
);
20630 int suppress_add
= 0;
20635 sym
= new (&objfile
->objfile_obstack
) symbol
;
20636 OBJSTAT (objfile
, n_syms
++);
20638 /* Cache this symbol's name and the name's demangled form (if any). */
20639 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20640 /* Fortran does not have mangling standard and the mangling does differ
20641 between gfortran, iFort etc. */
20642 const char *physname
20643 = (cu
->language
== language_fortran
20644 ? dwarf2_full_name (name
, die
, cu
)
20645 : dwarf2_physname (name
, die
, cu
));
20646 const char *linkagename
= dw2_linkage_name (die
, cu
);
20648 if (linkagename
== nullptr || cu
->language
== language_ada
)
20649 sym
->set_linkage_name (physname
);
20652 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20653 sym
->set_linkage_name (linkagename
);
20656 /* Default assumptions.
20657 Use the passed type or decode it from the die. */
20658 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20659 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20661 SYMBOL_TYPE (sym
) = type
;
20663 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20664 attr
= dwarf2_attr (die
,
20665 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20667 if (attr
!= nullptr)
20669 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20672 attr
= dwarf2_attr (die
,
20673 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20675 if (attr
!= nullptr)
20677 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20678 struct file_entry
*fe
;
20680 if (cu
->line_header
!= NULL
)
20681 fe
= cu
->line_header
->file_name_at (file_index
);
20686 complaint (_("file index out of range"));
20688 symbol_set_symtab (sym
, fe
->symtab
);
20694 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20695 if (attr
!= nullptr)
20699 addr
= attr
->value_as_address ();
20700 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20701 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20703 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20704 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20705 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20706 add_symbol_to_list (sym
, cu
->list_in_scope
);
20708 case DW_TAG_subprogram
:
20709 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20711 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20712 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20713 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20714 || cu
->language
== language_ada
20715 || cu
->language
== language_fortran
)
20717 /* Subprograms marked external are stored as a global symbol.
20718 Ada and Fortran subprograms, whether marked external or
20719 not, are always stored as a global symbol, because we want
20720 to be able to access them globally. For instance, we want
20721 to be able to break on a nested subprogram without having
20722 to specify the context. */
20723 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20727 list_to_add
= cu
->list_in_scope
;
20730 case DW_TAG_inlined_subroutine
:
20731 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20733 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20734 SYMBOL_INLINED (sym
) = 1;
20735 list_to_add
= cu
->list_in_scope
;
20737 case DW_TAG_template_value_param
:
20739 /* Fall through. */
20740 case DW_TAG_constant
:
20741 case DW_TAG_variable
:
20742 case DW_TAG_member
:
20743 /* Compilation with minimal debug info may result in
20744 variables with missing type entries. Change the
20745 misleading `void' type to something sensible. */
20746 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
20747 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20749 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20750 /* In the case of DW_TAG_member, we should only be called for
20751 static const members. */
20752 if (die
->tag
== DW_TAG_member
)
20754 /* dwarf2_add_field uses die_is_declaration,
20755 so we do the same. */
20756 gdb_assert (die_is_declaration (die
, cu
));
20759 if (attr
!= nullptr)
20761 dwarf2_const_value (attr
, sym
, cu
);
20762 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20765 if (attr2
&& (DW_UNSND (attr2
) != 0))
20766 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20768 list_to_add
= cu
->list_in_scope
;
20772 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20773 if (attr
!= nullptr)
20775 var_decode_location (attr
, sym
, cu
);
20776 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20778 /* Fortran explicitly imports any global symbols to the local
20779 scope by DW_TAG_common_block. */
20780 if (cu
->language
== language_fortran
&& die
->parent
20781 && die
->parent
->tag
== DW_TAG_common_block
)
20784 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20785 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20786 && !dwarf2_per_objfile
->has_section_at_zero
)
20788 /* When a static variable is eliminated by the linker,
20789 the corresponding debug information is not stripped
20790 out, but the variable address is set to null;
20791 do not add such variables into symbol table. */
20793 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20795 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20796 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20797 && dwarf2_per_objfile
->can_copy
)
20799 /* A global static variable might be subject to
20800 copy relocation. We first check for a local
20801 minsym, though, because maybe the symbol was
20802 marked hidden, in which case this would not
20804 bound_minimal_symbol found
20805 = (lookup_minimal_symbol_linkage
20806 (sym
->linkage_name (), objfile
));
20807 if (found
.minsym
!= nullptr)
20808 sym
->maybe_copied
= 1;
20811 /* A variable with DW_AT_external is never static,
20812 but it may be block-scoped. */
20814 = ((cu
->list_in_scope
20815 == cu
->get_builder ()->get_file_symbols ())
20816 ? cu
->get_builder ()->get_global_symbols ()
20817 : cu
->list_in_scope
);
20820 list_to_add
= cu
->list_in_scope
;
20824 /* We do not know the address of this symbol.
20825 If it is an external symbol and we have type information
20826 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20827 The address of the variable will then be determined from
20828 the minimal symbol table whenever the variable is
20830 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20832 /* Fortran explicitly imports any global symbols to the local
20833 scope by DW_TAG_common_block. */
20834 if (cu
->language
== language_fortran
&& die
->parent
20835 && die
->parent
->tag
== DW_TAG_common_block
)
20837 /* SYMBOL_CLASS doesn't matter here because
20838 read_common_block is going to reset it. */
20840 list_to_add
= cu
->list_in_scope
;
20842 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20843 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20845 /* A variable with DW_AT_external is never static, but it
20846 may be block-scoped. */
20848 = ((cu
->list_in_scope
20849 == cu
->get_builder ()->get_file_symbols ())
20850 ? cu
->get_builder ()->get_global_symbols ()
20851 : cu
->list_in_scope
);
20853 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20855 else if (!die_is_declaration (die
, cu
))
20857 /* Use the default LOC_OPTIMIZED_OUT class. */
20858 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20860 list_to_add
= cu
->list_in_scope
;
20864 case DW_TAG_formal_parameter
:
20866 /* If we are inside a function, mark this as an argument. If
20867 not, we might be looking at an argument to an inlined function
20868 when we do not have enough information to show inlined frames;
20869 pretend it's a local variable in that case so that the user can
20871 struct context_stack
*curr
20872 = cu
->get_builder ()->get_current_context_stack ();
20873 if (curr
!= nullptr && curr
->name
!= nullptr)
20874 SYMBOL_IS_ARGUMENT (sym
) = 1;
20875 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20876 if (attr
!= nullptr)
20878 var_decode_location (attr
, sym
, cu
);
20880 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20881 if (attr
!= nullptr)
20883 dwarf2_const_value (attr
, sym
, cu
);
20886 list_to_add
= cu
->list_in_scope
;
20889 case DW_TAG_unspecified_parameters
:
20890 /* From varargs functions; gdb doesn't seem to have any
20891 interest in this information, so just ignore it for now.
20894 case DW_TAG_template_type_param
:
20896 /* Fall through. */
20897 case DW_TAG_class_type
:
20898 case DW_TAG_interface_type
:
20899 case DW_TAG_structure_type
:
20900 case DW_TAG_union_type
:
20901 case DW_TAG_set_type
:
20902 case DW_TAG_enumeration_type
:
20903 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20904 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20907 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20908 really ever be static objects: otherwise, if you try
20909 to, say, break of a class's method and you're in a file
20910 which doesn't mention that class, it won't work unless
20911 the check for all static symbols in lookup_symbol_aux
20912 saves you. See the OtherFileClass tests in
20913 gdb.c++/namespace.exp. */
20917 buildsym_compunit
*builder
= cu
->get_builder ();
20919 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20920 && cu
->language
== language_cplus
20921 ? builder
->get_global_symbols ()
20922 : cu
->list_in_scope
);
20924 /* The semantics of C++ state that "struct foo {
20925 ... }" also defines a typedef for "foo". */
20926 if (cu
->language
== language_cplus
20927 || cu
->language
== language_ada
20928 || cu
->language
== language_d
20929 || cu
->language
== language_rust
)
20931 /* The symbol's name is already allocated along
20932 with this objfile, so we don't need to
20933 duplicate it for the type. */
20934 if (SYMBOL_TYPE (sym
)->name () == 0)
20935 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
20940 case DW_TAG_typedef
:
20941 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20942 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20943 list_to_add
= cu
->list_in_scope
;
20945 case DW_TAG_base_type
:
20946 case DW_TAG_subrange_type
:
20947 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20948 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20949 list_to_add
= cu
->list_in_scope
;
20951 case DW_TAG_enumerator
:
20952 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20953 if (attr
!= nullptr)
20955 dwarf2_const_value (attr
, sym
, cu
);
20958 /* NOTE: carlton/2003-11-10: See comment above in the
20959 DW_TAG_class_type, etc. block. */
20962 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20963 && cu
->language
== language_cplus
20964 ? cu
->get_builder ()->get_global_symbols ()
20965 : cu
->list_in_scope
);
20968 case DW_TAG_imported_declaration
:
20969 case DW_TAG_namespace
:
20970 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20971 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20973 case DW_TAG_module
:
20974 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20975 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20976 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20978 case DW_TAG_common_block
:
20979 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20980 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20981 add_symbol_to_list (sym
, cu
->list_in_scope
);
20984 /* Not a tag we recognize. Hopefully we aren't processing
20985 trash data, but since we must specifically ignore things
20986 we don't recognize, there is nothing else we should do at
20988 complaint (_("unsupported tag: '%s'"),
20989 dwarf_tag_name (die
->tag
));
20995 sym
->hash_next
= objfile
->template_symbols
;
20996 objfile
->template_symbols
= sym
;
20997 list_to_add
= NULL
;
21000 if (list_to_add
!= NULL
)
21001 add_symbol_to_list (sym
, list_to_add
);
21003 /* For the benefit of old versions of GCC, check for anonymous
21004 namespaces based on the demangled name. */
21005 if (!cu
->processing_has_namespace_info
21006 && cu
->language
== language_cplus
)
21007 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21012 /* Given an attr with a DW_FORM_dataN value in host byte order,
21013 zero-extend it as appropriate for the symbol's type. The DWARF
21014 standard (v4) is not entirely clear about the meaning of using
21015 DW_FORM_dataN for a constant with a signed type, where the type is
21016 wider than the data. The conclusion of a discussion on the DWARF
21017 list was that this is unspecified. We choose to always zero-extend
21018 because that is the interpretation long in use by GCC. */
21021 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21022 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21024 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21025 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21026 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21027 LONGEST l
= DW_UNSND (attr
);
21029 if (bits
< sizeof (*value
) * 8)
21031 l
&= ((LONGEST
) 1 << bits
) - 1;
21034 else if (bits
== sizeof (*value
) * 8)
21038 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21039 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21046 /* Read a constant value from an attribute. Either set *VALUE, or if
21047 the value does not fit in *VALUE, set *BYTES - either already
21048 allocated on the objfile obstack, or newly allocated on OBSTACK,
21049 or, set *BATON, if we translated the constant to a location
21053 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21054 const char *name
, struct obstack
*obstack
,
21055 struct dwarf2_cu
*cu
,
21056 LONGEST
*value
, const gdb_byte
**bytes
,
21057 struct dwarf2_locexpr_baton
**baton
)
21059 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21060 struct comp_unit_head
*cu_header
= &cu
->header
;
21061 struct dwarf_block
*blk
;
21062 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21063 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21069 switch (attr
->form
)
21072 case DW_FORM_addrx
:
21073 case DW_FORM_GNU_addr_index
:
21077 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21078 dwarf2_const_value_length_mismatch_complaint (name
,
21079 cu_header
->addr_size
,
21080 TYPE_LENGTH (type
));
21081 /* Symbols of this form are reasonably rare, so we just
21082 piggyback on the existing location code rather than writing
21083 a new implementation of symbol_computed_ops. */
21084 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21085 (*baton
)->per_cu
= cu
->per_cu
;
21086 gdb_assert ((*baton
)->per_cu
);
21088 (*baton
)->size
= 2 + cu_header
->addr_size
;
21089 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21090 (*baton
)->data
= data
;
21092 data
[0] = DW_OP_addr
;
21093 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21094 byte_order
, DW_ADDR (attr
));
21095 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21098 case DW_FORM_string
:
21101 case DW_FORM_GNU_str_index
:
21102 case DW_FORM_GNU_strp_alt
:
21103 /* DW_STRING is already allocated on the objfile obstack, point
21105 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21107 case DW_FORM_block1
:
21108 case DW_FORM_block2
:
21109 case DW_FORM_block4
:
21110 case DW_FORM_block
:
21111 case DW_FORM_exprloc
:
21112 case DW_FORM_data16
:
21113 blk
= DW_BLOCK (attr
);
21114 if (TYPE_LENGTH (type
) != blk
->size
)
21115 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21116 TYPE_LENGTH (type
));
21117 *bytes
= blk
->data
;
21120 /* The DW_AT_const_value attributes are supposed to carry the
21121 symbol's value "represented as it would be on the target
21122 architecture." By the time we get here, it's already been
21123 converted to host endianness, so we just need to sign- or
21124 zero-extend it as appropriate. */
21125 case DW_FORM_data1
:
21126 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21128 case DW_FORM_data2
:
21129 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21131 case DW_FORM_data4
:
21132 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21134 case DW_FORM_data8
:
21135 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21138 case DW_FORM_sdata
:
21139 case DW_FORM_implicit_const
:
21140 *value
= DW_SND (attr
);
21143 case DW_FORM_udata
:
21144 *value
= DW_UNSND (attr
);
21148 complaint (_("unsupported const value attribute form: '%s'"),
21149 dwarf_form_name (attr
->form
));
21156 /* Copy constant value from an attribute to a symbol. */
21159 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21160 struct dwarf2_cu
*cu
)
21162 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21164 const gdb_byte
*bytes
;
21165 struct dwarf2_locexpr_baton
*baton
;
21167 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21168 sym
->print_name (),
21169 &objfile
->objfile_obstack
, cu
,
21170 &value
, &bytes
, &baton
);
21174 SYMBOL_LOCATION_BATON (sym
) = baton
;
21175 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21177 else if (bytes
!= NULL
)
21179 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21180 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21184 SYMBOL_VALUE (sym
) = value
;
21185 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21189 /* Return the type of the die in question using its DW_AT_type attribute. */
21191 static struct type
*
21192 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21194 struct attribute
*type_attr
;
21196 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21199 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21200 /* A missing DW_AT_type represents a void type. */
21201 return objfile_type (objfile
)->builtin_void
;
21204 return lookup_die_type (die
, type_attr
, cu
);
21207 /* True iff CU's producer generates GNAT Ada auxiliary information
21208 that allows to find parallel types through that information instead
21209 of having to do expensive parallel lookups by type name. */
21212 need_gnat_info (struct dwarf2_cu
*cu
)
21214 /* Assume that the Ada compiler was GNAT, which always produces
21215 the auxiliary information. */
21216 return (cu
->language
== language_ada
);
21219 /* Return the auxiliary type of the die in question using its
21220 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21221 attribute is not present. */
21223 static struct type
*
21224 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21226 struct attribute
*type_attr
;
21228 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21232 return lookup_die_type (die
, type_attr
, cu
);
21235 /* If DIE has a descriptive_type attribute, then set the TYPE's
21236 descriptive type accordingly. */
21239 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21240 struct dwarf2_cu
*cu
)
21242 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21244 if (descriptive_type
)
21246 ALLOCATE_GNAT_AUX_TYPE (type
);
21247 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21251 /* Return the containing type of the die in question using its
21252 DW_AT_containing_type attribute. */
21254 static struct type
*
21255 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21257 struct attribute
*type_attr
;
21258 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21260 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21262 error (_("Dwarf Error: Problem turning containing type into gdb type "
21263 "[in module %s]"), objfile_name (objfile
));
21265 return lookup_die_type (die
, type_attr
, cu
);
21268 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21270 static struct type
*
21271 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21273 struct dwarf2_per_objfile
*dwarf2_per_objfile
21274 = cu
->per_cu
->dwarf2_per_objfile
;
21275 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21278 std::string message
21279 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21280 objfile_name (objfile
),
21281 sect_offset_str (cu
->header
.sect_off
),
21282 sect_offset_str (die
->sect_off
));
21283 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21285 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21288 /* Look up the type of DIE in CU using its type attribute ATTR.
21289 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21290 DW_AT_containing_type.
21291 If there is no type substitute an error marker. */
21293 static struct type
*
21294 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21295 struct dwarf2_cu
*cu
)
21297 struct dwarf2_per_objfile
*dwarf2_per_objfile
21298 = cu
->per_cu
->dwarf2_per_objfile
;
21299 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21300 struct type
*this_type
;
21302 gdb_assert (attr
->name
== DW_AT_type
21303 || attr
->name
== DW_AT_GNAT_descriptive_type
21304 || attr
->name
== DW_AT_containing_type
);
21306 /* First see if we have it cached. */
21308 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21310 struct dwarf2_per_cu_data
*per_cu
;
21311 sect_offset sect_off
= attr
->get_ref_die_offset ();
21313 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21314 dwarf2_per_objfile
);
21315 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21317 else if (attr
->form_is_ref ())
21319 sect_offset sect_off
= attr
->get_ref_die_offset ();
21321 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21323 else if (attr
->form
== DW_FORM_ref_sig8
)
21325 ULONGEST signature
= DW_SIGNATURE (attr
);
21327 return get_signatured_type (die
, signature
, cu
);
21331 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21332 " at %s [in module %s]"),
21333 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21334 objfile_name (objfile
));
21335 return build_error_marker_type (cu
, die
);
21338 /* If not cached we need to read it in. */
21340 if (this_type
== NULL
)
21342 struct die_info
*type_die
= NULL
;
21343 struct dwarf2_cu
*type_cu
= cu
;
21345 if (attr
->form_is_ref ())
21346 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21347 if (type_die
== NULL
)
21348 return build_error_marker_type (cu
, die
);
21349 /* If we find the type now, it's probably because the type came
21350 from an inter-CU reference and the type's CU got expanded before
21352 this_type
= read_type_die (type_die
, type_cu
);
21355 /* If we still don't have a type use an error marker. */
21357 if (this_type
== NULL
)
21358 return build_error_marker_type (cu
, die
);
21363 /* Return the type in DIE, CU.
21364 Returns NULL for invalid types.
21366 This first does a lookup in die_type_hash,
21367 and only reads the die in if necessary.
21369 NOTE: This can be called when reading in partial or full symbols. */
21371 static struct type
*
21372 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21374 struct type
*this_type
;
21376 this_type
= get_die_type (die
, cu
);
21380 return read_type_die_1 (die
, cu
);
21383 /* Read the type in DIE, CU.
21384 Returns NULL for invalid types. */
21386 static struct type
*
21387 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21389 struct type
*this_type
= NULL
;
21393 case DW_TAG_class_type
:
21394 case DW_TAG_interface_type
:
21395 case DW_TAG_structure_type
:
21396 case DW_TAG_union_type
:
21397 this_type
= read_structure_type (die
, cu
);
21399 case DW_TAG_enumeration_type
:
21400 this_type
= read_enumeration_type (die
, cu
);
21402 case DW_TAG_subprogram
:
21403 case DW_TAG_subroutine_type
:
21404 case DW_TAG_inlined_subroutine
:
21405 this_type
= read_subroutine_type (die
, cu
);
21407 case DW_TAG_array_type
:
21408 this_type
= read_array_type (die
, cu
);
21410 case DW_TAG_set_type
:
21411 this_type
= read_set_type (die
, cu
);
21413 case DW_TAG_pointer_type
:
21414 this_type
= read_tag_pointer_type (die
, cu
);
21416 case DW_TAG_ptr_to_member_type
:
21417 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21419 case DW_TAG_reference_type
:
21420 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21422 case DW_TAG_rvalue_reference_type
:
21423 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21425 case DW_TAG_const_type
:
21426 this_type
= read_tag_const_type (die
, cu
);
21428 case DW_TAG_volatile_type
:
21429 this_type
= read_tag_volatile_type (die
, cu
);
21431 case DW_TAG_restrict_type
:
21432 this_type
= read_tag_restrict_type (die
, cu
);
21434 case DW_TAG_string_type
:
21435 this_type
= read_tag_string_type (die
, cu
);
21437 case DW_TAG_typedef
:
21438 this_type
= read_typedef (die
, cu
);
21440 case DW_TAG_subrange_type
:
21441 this_type
= read_subrange_type (die
, cu
);
21443 case DW_TAG_base_type
:
21444 this_type
= read_base_type (die
, cu
);
21446 case DW_TAG_unspecified_type
:
21447 this_type
= read_unspecified_type (die
, cu
);
21449 case DW_TAG_namespace
:
21450 this_type
= read_namespace_type (die
, cu
);
21452 case DW_TAG_module
:
21453 this_type
= read_module_type (die
, cu
);
21455 case DW_TAG_atomic_type
:
21456 this_type
= read_tag_atomic_type (die
, cu
);
21459 complaint (_("unexpected tag in read_type_die: '%s'"),
21460 dwarf_tag_name (die
->tag
));
21467 /* See if we can figure out if the class lives in a namespace. We do
21468 this by looking for a member function; its demangled name will
21469 contain namespace info, if there is any.
21470 Return the computed name or NULL.
21471 Space for the result is allocated on the objfile's obstack.
21472 This is the full-die version of guess_partial_die_structure_name.
21473 In this case we know DIE has no useful parent. */
21475 static const char *
21476 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21478 struct die_info
*spec_die
;
21479 struct dwarf2_cu
*spec_cu
;
21480 struct die_info
*child
;
21481 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21484 spec_die
= die_specification (die
, &spec_cu
);
21485 if (spec_die
!= NULL
)
21491 for (child
= die
->child
;
21493 child
= child
->sibling
)
21495 if (child
->tag
== DW_TAG_subprogram
)
21497 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21499 if (linkage_name
!= NULL
)
21501 gdb::unique_xmalloc_ptr
<char> actual_name
21502 (language_class_name_from_physname (cu
->language_defn
,
21504 const char *name
= NULL
;
21506 if (actual_name
!= NULL
)
21508 const char *die_name
= dwarf2_name (die
, cu
);
21510 if (die_name
!= NULL
21511 && strcmp (die_name
, actual_name
.get ()) != 0)
21513 /* Strip off the class name from the full name.
21514 We want the prefix. */
21515 int die_name_len
= strlen (die_name
);
21516 int actual_name_len
= strlen (actual_name
.get ());
21517 const char *ptr
= actual_name
.get ();
21519 /* Test for '::' as a sanity check. */
21520 if (actual_name_len
> die_name_len
+ 2
21521 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21522 name
= obstack_strndup (
21523 &objfile
->per_bfd
->storage_obstack
,
21524 ptr
, actual_name_len
- die_name_len
- 2);
21535 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21536 prefix part in such case. See
21537 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21539 static const char *
21540 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21542 struct attribute
*attr
;
21545 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21546 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21549 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21552 attr
= dw2_linkage_name_attr (die
, cu
);
21553 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21556 /* dwarf2_name had to be already called. */
21557 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21559 /* Strip the base name, keep any leading namespaces/classes. */
21560 base
= strrchr (DW_STRING (attr
), ':');
21561 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21564 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21565 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21567 &base
[-1] - DW_STRING (attr
));
21570 /* Return the name of the namespace/class that DIE is defined within,
21571 or "" if we can't tell. The caller should not xfree the result.
21573 For example, if we're within the method foo() in the following
21583 then determine_prefix on foo's die will return "N::C". */
21585 static const char *
21586 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21588 struct dwarf2_per_objfile
*dwarf2_per_objfile
21589 = cu
->per_cu
->dwarf2_per_objfile
;
21590 struct die_info
*parent
, *spec_die
;
21591 struct dwarf2_cu
*spec_cu
;
21592 struct type
*parent_type
;
21593 const char *retval
;
21595 if (cu
->language
!= language_cplus
21596 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21597 && cu
->language
!= language_rust
)
21600 retval
= anonymous_struct_prefix (die
, cu
);
21604 /* We have to be careful in the presence of DW_AT_specification.
21605 For example, with GCC 3.4, given the code
21609 // Definition of N::foo.
21613 then we'll have a tree of DIEs like this:
21615 1: DW_TAG_compile_unit
21616 2: DW_TAG_namespace // N
21617 3: DW_TAG_subprogram // declaration of N::foo
21618 4: DW_TAG_subprogram // definition of N::foo
21619 DW_AT_specification // refers to die #3
21621 Thus, when processing die #4, we have to pretend that we're in
21622 the context of its DW_AT_specification, namely the contex of die
21625 spec_die
= die_specification (die
, &spec_cu
);
21626 if (spec_die
== NULL
)
21627 parent
= die
->parent
;
21630 parent
= spec_die
->parent
;
21634 if (parent
== NULL
)
21636 else if (parent
->building_fullname
)
21639 const char *parent_name
;
21641 /* It has been seen on RealView 2.2 built binaries,
21642 DW_TAG_template_type_param types actually _defined_ as
21643 children of the parent class:
21646 template class <class Enum> Class{};
21647 Class<enum E> class_e;
21649 1: DW_TAG_class_type (Class)
21650 2: DW_TAG_enumeration_type (E)
21651 3: DW_TAG_enumerator (enum1:0)
21652 3: DW_TAG_enumerator (enum2:1)
21654 2: DW_TAG_template_type_param
21655 DW_AT_type DW_FORM_ref_udata (E)
21657 Besides being broken debug info, it can put GDB into an
21658 infinite loop. Consider:
21660 When we're building the full name for Class<E>, we'll start
21661 at Class, and go look over its template type parameters,
21662 finding E. We'll then try to build the full name of E, and
21663 reach here. We're now trying to build the full name of E,
21664 and look over the parent DIE for containing scope. In the
21665 broken case, if we followed the parent DIE of E, we'd again
21666 find Class, and once again go look at its template type
21667 arguments, etc., etc. Simply don't consider such parent die
21668 as source-level parent of this die (it can't be, the language
21669 doesn't allow it), and break the loop here. */
21670 name
= dwarf2_name (die
, cu
);
21671 parent_name
= dwarf2_name (parent
, cu
);
21672 complaint (_("template param type '%s' defined within parent '%s'"),
21673 name
? name
: "<unknown>",
21674 parent_name
? parent_name
: "<unknown>");
21678 switch (parent
->tag
)
21680 case DW_TAG_namespace
:
21681 parent_type
= read_type_die (parent
, cu
);
21682 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21683 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21684 Work around this problem here. */
21685 if (cu
->language
== language_cplus
21686 && strcmp (parent_type
->name (), "::") == 0)
21688 /* We give a name to even anonymous namespaces. */
21689 return parent_type
->name ();
21690 case DW_TAG_class_type
:
21691 case DW_TAG_interface_type
:
21692 case DW_TAG_structure_type
:
21693 case DW_TAG_union_type
:
21694 case DW_TAG_module
:
21695 parent_type
= read_type_die (parent
, cu
);
21696 if (parent_type
->name () != NULL
)
21697 return parent_type
->name ();
21699 /* An anonymous structure is only allowed non-static data
21700 members; no typedefs, no member functions, et cetera.
21701 So it does not need a prefix. */
21703 case DW_TAG_compile_unit
:
21704 case DW_TAG_partial_unit
:
21705 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21706 if (cu
->language
== language_cplus
21707 && !dwarf2_per_objfile
->types
.empty ()
21708 && die
->child
!= NULL
21709 && (die
->tag
== DW_TAG_class_type
21710 || die
->tag
== DW_TAG_structure_type
21711 || die
->tag
== DW_TAG_union_type
))
21713 const char *name
= guess_full_die_structure_name (die
, cu
);
21718 case DW_TAG_subprogram
:
21719 /* Nested subroutines in Fortran get a prefix with the name
21720 of the parent's subroutine. */
21721 if (cu
->language
== language_fortran
)
21723 if ((die
->tag
== DW_TAG_subprogram
)
21724 && (dwarf2_name (parent
, cu
) != NULL
))
21725 return dwarf2_name (parent
, cu
);
21727 return determine_prefix (parent
, cu
);
21728 case DW_TAG_enumeration_type
:
21729 parent_type
= read_type_die (parent
, cu
);
21730 if (TYPE_DECLARED_CLASS (parent_type
))
21732 if (parent_type
->name () != NULL
)
21733 return parent_type
->name ();
21736 /* Fall through. */
21738 return determine_prefix (parent
, cu
);
21742 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21743 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21744 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21745 an obconcat, otherwise allocate storage for the result. The CU argument is
21746 used to determine the language and hence, the appropriate separator. */
21748 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21751 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21752 int physname
, struct dwarf2_cu
*cu
)
21754 const char *lead
= "";
21757 if (suffix
== NULL
|| suffix
[0] == '\0'
21758 || prefix
== NULL
|| prefix
[0] == '\0')
21760 else if (cu
->language
== language_d
)
21762 /* For D, the 'main' function could be defined in any module, but it
21763 should never be prefixed. */
21764 if (strcmp (suffix
, "D main") == 0)
21772 else if (cu
->language
== language_fortran
&& physname
)
21774 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21775 DW_AT_MIPS_linkage_name is preferred and used instead. */
21783 if (prefix
== NULL
)
21785 if (suffix
== NULL
)
21792 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21794 strcpy (retval
, lead
);
21795 strcat (retval
, prefix
);
21796 strcat (retval
, sep
);
21797 strcat (retval
, suffix
);
21802 /* We have an obstack. */
21803 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21807 /* Get name of a die, return NULL if not found. */
21809 static const char *
21810 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21811 struct objfile
*objfile
)
21813 if (name
&& cu
->language
== language_cplus
)
21815 gdb::unique_xmalloc_ptr
<char> canon_name
21816 = cp_canonicalize_string (name
);
21818 if (canon_name
!= nullptr)
21819 name
= objfile
->intern (canon_name
.get ());
21825 /* Get name of a die, return NULL if not found.
21826 Anonymous namespaces are converted to their magic string. */
21828 static const char *
21829 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21831 struct attribute
*attr
;
21832 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21834 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21835 if ((!attr
|| !DW_STRING (attr
))
21836 && die
->tag
!= DW_TAG_namespace
21837 && die
->tag
!= DW_TAG_class_type
21838 && die
->tag
!= DW_TAG_interface_type
21839 && die
->tag
!= DW_TAG_structure_type
21840 && die
->tag
!= DW_TAG_union_type
)
21845 case DW_TAG_compile_unit
:
21846 case DW_TAG_partial_unit
:
21847 /* Compilation units have a DW_AT_name that is a filename, not
21848 a source language identifier. */
21849 case DW_TAG_enumeration_type
:
21850 case DW_TAG_enumerator
:
21851 /* These tags always have simple identifiers already; no need
21852 to canonicalize them. */
21853 return DW_STRING (attr
);
21855 case DW_TAG_namespace
:
21856 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21857 return DW_STRING (attr
);
21858 return CP_ANONYMOUS_NAMESPACE_STR
;
21860 case DW_TAG_class_type
:
21861 case DW_TAG_interface_type
:
21862 case DW_TAG_structure_type
:
21863 case DW_TAG_union_type
:
21864 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21865 structures or unions. These were of the form "._%d" in GCC 4.1,
21866 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21867 and GCC 4.4. We work around this problem by ignoring these. */
21868 if (attr
&& DW_STRING (attr
)
21869 && (startswith (DW_STRING (attr
), "._")
21870 || startswith (DW_STRING (attr
), "<anonymous")))
21873 /* GCC might emit a nameless typedef that has a linkage name. See
21874 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21875 if (!attr
|| DW_STRING (attr
) == NULL
)
21877 attr
= dw2_linkage_name_attr (die
, cu
);
21878 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21881 /* Avoid demangling DW_STRING (attr) the second time on a second
21882 call for the same DIE. */
21883 if (!DW_STRING_IS_CANONICAL (attr
))
21885 gdb::unique_xmalloc_ptr
<char> demangled
21886 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21887 if (demangled
== nullptr)
21890 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21891 DW_STRING_IS_CANONICAL (attr
) = 1;
21894 /* Strip any leading namespaces/classes, keep only the base name.
21895 DW_AT_name for named DIEs does not contain the prefixes. */
21896 const char *base
= strrchr (DW_STRING (attr
), ':');
21897 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21900 return DW_STRING (attr
);
21908 if (!DW_STRING_IS_CANONICAL (attr
))
21910 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21912 DW_STRING_IS_CANONICAL (attr
) = 1;
21914 return DW_STRING (attr
);
21917 /* Return the die that this die in an extension of, or NULL if there
21918 is none. *EXT_CU is the CU containing DIE on input, and the CU
21919 containing the return value on output. */
21921 static struct die_info
*
21922 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21924 struct attribute
*attr
;
21926 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21930 return follow_die_ref (die
, attr
, ext_cu
);
21934 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21938 print_spaces (indent
, f
);
21939 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21940 dwarf_tag_name (die
->tag
), die
->abbrev
,
21941 sect_offset_str (die
->sect_off
));
21943 if (die
->parent
!= NULL
)
21945 print_spaces (indent
, f
);
21946 fprintf_unfiltered (f
, " parent at offset: %s\n",
21947 sect_offset_str (die
->parent
->sect_off
));
21950 print_spaces (indent
, f
);
21951 fprintf_unfiltered (f
, " has children: %s\n",
21952 dwarf_bool_name (die
->child
!= NULL
));
21954 print_spaces (indent
, f
);
21955 fprintf_unfiltered (f
, " attributes:\n");
21957 for (i
= 0; i
< die
->num_attrs
; ++i
)
21959 print_spaces (indent
, f
);
21960 fprintf_unfiltered (f
, " %s (%s) ",
21961 dwarf_attr_name (die
->attrs
[i
].name
),
21962 dwarf_form_name (die
->attrs
[i
].form
));
21964 switch (die
->attrs
[i
].form
)
21967 case DW_FORM_addrx
:
21968 case DW_FORM_GNU_addr_index
:
21969 fprintf_unfiltered (f
, "address: ");
21970 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21972 case DW_FORM_block2
:
21973 case DW_FORM_block4
:
21974 case DW_FORM_block
:
21975 case DW_FORM_block1
:
21976 fprintf_unfiltered (f
, "block: size %s",
21977 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21979 case DW_FORM_exprloc
:
21980 fprintf_unfiltered (f
, "expression: size %s",
21981 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21983 case DW_FORM_data16
:
21984 fprintf_unfiltered (f
, "constant of 16 bytes");
21986 case DW_FORM_ref_addr
:
21987 fprintf_unfiltered (f
, "ref address: ");
21988 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21990 case DW_FORM_GNU_ref_alt
:
21991 fprintf_unfiltered (f
, "alt ref address: ");
21992 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21998 case DW_FORM_ref_udata
:
21999 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22000 (long) (DW_UNSND (&die
->attrs
[i
])));
22002 case DW_FORM_data1
:
22003 case DW_FORM_data2
:
22004 case DW_FORM_data4
:
22005 case DW_FORM_data8
:
22006 case DW_FORM_udata
:
22007 case DW_FORM_sdata
:
22008 fprintf_unfiltered (f
, "constant: %s",
22009 pulongest (DW_UNSND (&die
->attrs
[i
])));
22011 case DW_FORM_sec_offset
:
22012 fprintf_unfiltered (f
, "section offset: %s",
22013 pulongest (DW_UNSND (&die
->attrs
[i
])));
22015 case DW_FORM_ref_sig8
:
22016 fprintf_unfiltered (f
, "signature: %s",
22017 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22019 case DW_FORM_string
:
22021 case DW_FORM_line_strp
:
22023 case DW_FORM_GNU_str_index
:
22024 case DW_FORM_GNU_strp_alt
:
22025 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22026 DW_STRING (&die
->attrs
[i
])
22027 ? DW_STRING (&die
->attrs
[i
]) : "",
22028 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22031 if (DW_UNSND (&die
->attrs
[i
]))
22032 fprintf_unfiltered (f
, "flag: TRUE");
22034 fprintf_unfiltered (f
, "flag: FALSE");
22036 case DW_FORM_flag_present
:
22037 fprintf_unfiltered (f
, "flag: TRUE");
22039 case DW_FORM_indirect
:
22040 /* The reader will have reduced the indirect form to
22041 the "base form" so this form should not occur. */
22042 fprintf_unfiltered (f
,
22043 "unexpected attribute form: DW_FORM_indirect");
22045 case DW_FORM_implicit_const
:
22046 fprintf_unfiltered (f
, "constant: %s",
22047 plongest (DW_SND (&die
->attrs
[i
])));
22050 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22051 die
->attrs
[i
].form
);
22054 fprintf_unfiltered (f
, "\n");
22059 dump_die_for_error (struct die_info
*die
)
22061 dump_die_shallow (gdb_stderr
, 0, die
);
22065 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22067 int indent
= level
* 4;
22069 gdb_assert (die
!= NULL
);
22071 if (level
>= max_level
)
22074 dump_die_shallow (f
, indent
, die
);
22076 if (die
->child
!= NULL
)
22078 print_spaces (indent
, f
);
22079 fprintf_unfiltered (f
, " Children:");
22080 if (level
+ 1 < max_level
)
22082 fprintf_unfiltered (f
, "\n");
22083 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22087 fprintf_unfiltered (f
,
22088 " [not printed, max nesting level reached]\n");
22092 if (die
->sibling
!= NULL
&& level
> 0)
22094 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22098 /* This is called from the pdie macro in gdbinit.in.
22099 It's not static so gcc will keep a copy callable from gdb. */
22102 dump_die (struct die_info
*die
, int max_level
)
22104 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22108 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22112 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22113 to_underlying (die
->sect_off
),
22119 /* Follow reference or signature attribute ATTR of SRC_DIE.
22120 On entry *REF_CU is the CU of SRC_DIE.
22121 On exit *REF_CU is the CU of the result. */
22123 static struct die_info
*
22124 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22125 struct dwarf2_cu
**ref_cu
)
22127 struct die_info
*die
;
22129 if (attr
->form_is_ref ())
22130 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22131 else if (attr
->form
== DW_FORM_ref_sig8
)
22132 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22135 dump_die_for_error (src_die
);
22136 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22137 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22143 /* Follow reference OFFSET.
22144 On entry *REF_CU is the CU of the source die referencing OFFSET.
22145 On exit *REF_CU is the CU of the result.
22146 Returns NULL if OFFSET is invalid. */
22148 static struct die_info
*
22149 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22150 struct dwarf2_cu
**ref_cu
)
22152 struct die_info temp_die
;
22153 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22154 struct dwarf2_per_objfile
*dwarf2_per_objfile
22155 = cu
->per_cu
->dwarf2_per_objfile
;
22157 gdb_assert (cu
->per_cu
!= NULL
);
22161 if (cu
->per_cu
->is_debug_types
)
22163 /* .debug_types CUs cannot reference anything outside their CU.
22164 If they need to, they have to reference a signatured type via
22165 DW_FORM_ref_sig8. */
22166 if (!cu
->header
.offset_in_cu_p (sect_off
))
22169 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22170 || !cu
->header
.offset_in_cu_p (sect_off
))
22172 struct dwarf2_per_cu_data
*per_cu
;
22174 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22175 dwarf2_per_objfile
);
22177 /* If necessary, add it to the queue and load its DIEs. */
22178 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22179 load_full_comp_unit (per_cu
, false, cu
->language
);
22181 target_cu
= per_cu
->cu
;
22183 else if (cu
->dies
== NULL
)
22185 /* We're loading full DIEs during partial symbol reading. */
22186 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22187 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22190 *ref_cu
= target_cu
;
22191 temp_die
.sect_off
= sect_off
;
22193 if (target_cu
!= cu
)
22194 target_cu
->ancestor
= cu
;
22196 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22198 to_underlying (sect_off
));
22201 /* Follow reference attribute ATTR of SRC_DIE.
22202 On entry *REF_CU is the CU of SRC_DIE.
22203 On exit *REF_CU is the CU of the result. */
22205 static struct die_info
*
22206 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22207 struct dwarf2_cu
**ref_cu
)
22209 sect_offset sect_off
= attr
->get_ref_die_offset ();
22210 struct dwarf2_cu
*cu
= *ref_cu
;
22211 struct die_info
*die
;
22213 die
= follow_die_offset (sect_off
,
22214 (attr
->form
== DW_FORM_GNU_ref_alt
22215 || cu
->per_cu
->is_dwz
),
22218 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22219 "at %s [in module %s]"),
22220 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22221 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22228 struct dwarf2_locexpr_baton
22229 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22230 dwarf2_per_cu_data
*per_cu
,
22231 CORE_ADDR (*get_frame_pc
) (void *baton
),
22232 void *baton
, bool resolve_abstract_p
)
22234 struct dwarf2_cu
*cu
;
22235 struct die_info
*die
;
22236 struct attribute
*attr
;
22237 struct dwarf2_locexpr_baton retval
;
22238 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22239 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22241 if (per_cu
->cu
== NULL
)
22242 load_cu (per_cu
, false);
22246 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22247 Instead just throw an error, not much else we can do. */
22248 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22249 sect_offset_str (sect_off
), objfile_name (objfile
));
22252 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22254 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22255 sect_offset_str (sect_off
), objfile_name (objfile
));
22257 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22258 if (!attr
&& resolve_abstract_p
22259 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22260 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22262 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22263 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22264 struct gdbarch
*gdbarch
= objfile
->arch ();
22266 for (const auto &cand_off
22267 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22269 struct dwarf2_cu
*cand_cu
= cu
;
22270 struct die_info
*cand
22271 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22274 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22277 CORE_ADDR pc_low
, pc_high
;
22278 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22279 if (pc_low
== ((CORE_ADDR
) -1))
22281 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22282 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22283 if (!(pc_low
<= pc
&& pc
< pc_high
))
22287 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22294 /* DWARF: "If there is no such attribute, then there is no effect.".
22295 DATA is ignored if SIZE is 0. */
22297 retval
.data
= NULL
;
22300 else if (attr
->form_is_section_offset ())
22302 struct dwarf2_loclist_baton loclist_baton
;
22303 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22306 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22308 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22310 retval
.size
= size
;
22314 if (!attr
->form_is_block ())
22315 error (_("Dwarf Error: DIE at %s referenced in module %s "
22316 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22317 sect_offset_str (sect_off
), objfile_name (objfile
));
22319 retval
.data
= DW_BLOCK (attr
)->data
;
22320 retval
.size
= DW_BLOCK (attr
)->size
;
22322 retval
.per_cu
= cu
->per_cu
;
22324 age_cached_comp_units (dwarf2_per_objfile
);
22331 struct dwarf2_locexpr_baton
22332 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22333 dwarf2_per_cu_data
*per_cu
,
22334 CORE_ADDR (*get_frame_pc
) (void *baton
),
22337 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22339 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22342 /* Write a constant of a given type as target-ordered bytes into
22345 static const gdb_byte
*
22346 write_constant_as_bytes (struct obstack
*obstack
,
22347 enum bfd_endian byte_order
,
22354 *len
= TYPE_LENGTH (type
);
22355 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22356 store_unsigned_integer (result
, *len
, byte_order
, value
);
22364 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22365 dwarf2_per_cu_data
*per_cu
,
22369 struct dwarf2_cu
*cu
;
22370 struct die_info
*die
;
22371 struct attribute
*attr
;
22372 const gdb_byte
*result
= NULL
;
22375 enum bfd_endian byte_order
;
22376 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22378 if (per_cu
->cu
== NULL
)
22379 load_cu (per_cu
, false);
22383 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22384 Instead just throw an error, not much else we can do. */
22385 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22386 sect_offset_str (sect_off
), objfile_name (objfile
));
22389 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22391 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22392 sect_offset_str (sect_off
), objfile_name (objfile
));
22394 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22398 byte_order
= (bfd_big_endian (objfile
->obfd
)
22399 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22401 switch (attr
->form
)
22404 case DW_FORM_addrx
:
22405 case DW_FORM_GNU_addr_index
:
22409 *len
= cu
->header
.addr_size
;
22410 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22411 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22415 case DW_FORM_string
:
22418 case DW_FORM_GNU_str_index
:
22419 case DW_FORM_GNU_strp_alt
:
22420 /* DW_STRING is already allocated on the objfile obstack, point
22422 result
= (const gdb_byte
*) DW_STRING (attr
);
22423 *len
= strlen (DW_STRING (attr
));
22425 case DW_FORM_block1
:
22426 case DW_FORM_block2
:
22427 case DW_FORM_block4
:
22428 case DW_FORM_block
:
22429 case DW_FORM_exprloc
:
22430 case DW_FORM_data16
:
22431 result
= DW_BLOCK (attr
)->data
;
22432 *len
= DW_BLOCK (attr
)->size
;
22435 /* The DW_AT_const_value attributes are supposed to carry the
22436 symbol's value "represented as it would be on the target
22437 architecture." By the time we get here, it's already been
22438 converted to host endianness, so we just need to sign- or
22439 zero-extend it as appropriate. */
22440 case DW_FORM_data1
:
22441 type
= die_type (die
, cu
);
22442 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22443 if (result
== NULL
)
22444 result
= write_constant_as_bytes (obstack
, byte_order
,
22447 case DW_FORM_data2
:
22448 type
= die_type (die
, cu
);
22449 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22450 if (result
== NULL
)
22451 result
= write_constant_as_bytes (obstack
, byte_order
,
22454 case DW_FORM_data4
:
22455 type
= die_type (die
, cu
);
22456 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22457 if (result
== NULL
)
22458 result
= write_constant_as_bytes (obstack
, byte_order
,
22461 case DW_FORM_data8
:
22462 type
= die_type (die
, cu
);
22463 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22464 if (result
== NULL
)
22465 result
= write_constant_as_bytes (obstack
, byte_order
,
22469 case DW_FORM_sdata
:
22470 case DW_FORM_implicit_const
:
22471 type
= die_type (die
, cu
);
22472 result
= write_constant_as_bytes (obstack
, byte_order
,
22473 type
, DW_SND (attr
), len
);
22476 case DW_FORM_udata
:
22477 type
= die_type (die
, cu
);
22478 result
= write_constant_as_bytes (obstack
, byte_order
,
22479 type
, DW_UNSND (attr
), len
);
22483 complaint (_("unsupported const value attribute form: '%s'"),
22484 dwarf_form_name (attr
->form
));
22494 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22495 dwarf2_per_cu_data
*per_cu
)
22497 struct dwarf2_cu
*cu
;
22498 struct die_info
*die
;
22500 if (per_cu
->cu
== NULL
)
22501 load_cu (per_cu
, false);
22506 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22510 return die_type (die
, cu
);
22516 dwarf2_get_die_type (cu_offset die_offset
,
22517 struct dwarf2_per_cu_data
*per_cu
)
22519 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22520 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22523 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22524 On entry *REF_CU is the CU of SRC_DIE.
22525 On exit *REF_CU is the CU of the result.
22526 Returns NULL if the referenced DIE isn't found. */
22528 static struct die_info
*
22529 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22530 struct dwarf2_cu
**ref_cu
)
22532 struct die_info temp_die
;
22533 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22534 struct die_info
*die
;
22536 /* While it might be nice to assert sig_type->type == NULL here,
22537 we can get here for DW_AT_imported_declaration where we need
22538 the DIE not the type. */
22540 /* If necessary, add it to the queue and load its DIEs. */
22542 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22543 read_signatured_type (sig_type
);
22545 sig_cu
= sig_type
->per_cu
.cu
;
22546 gdb_assert (sig_cu
!= NULL
);
22547 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22548 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22549 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22550 to_underlying (temp_die
.sect_off
));
22553 struct dwarf2_per_objfile
*dwarf2_per_objfile
22554 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22556 /* For .gdb_index version 7 keep track of included TUs.
22557 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22558 if (dwarf2_per_objfile
->index_table
!= NULL
22559 && dwarf2_per_objfile
->index_table
->version
<= 7)
22561 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22566 sig_cu
->ancestor
= cu
;
22574 /* Follow signatured type referenced by ATTR in SRC_DIE.
22575 On entry *REF_CU is the CU of SRC_DIE.
22576 On exit *REF_CU is the CU of the result.
22577 The result is the DIE of the type.
22578 If the referenced type cannot be found an error is thrown. */
22580 static struct die_info
*
22581 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22582 struct dwarf2_cu
**ref_cu
)
22584 ULONGEST signature
= DW_SIGNATURE (attr
);
22585 struct signatured_type
*sig_type
;
22586 struct die_info
*die
;
22588 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22590 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22591 /* sig_type will be NULL if the signatured type is missing from
22593 if (sig_type
== NULL
)
22595 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22596 " from DIE at %s [in module %s]"),
22597 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22598 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22601 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22604 dump_die_for_error (src_die
);
22605 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22606 " from DIE at %s [in module %s]"),
22607 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22608 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22614 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22615 reading in and processing the type unit if necessary. */
22617 static struct type
*
22618 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22619 struct dwarf2_cu
*cu
)
22621 struct dwarf2_per_objfile
*dwarf2_per_objfile
22622 = cu
->per_cu
->dwarf2_per_objfile
;
22623 struct signatured_type
*sig_type
;
22624 struct dwarf2_cu
*type_cu
;
22625 struct die_info
*type_die
;
22628 sig_type
= lookup_signatured_type (cu
, signature
);
22629 /* sig_type will be NULL if the signatured type is missing from
22631 if (sig_type
== NULL
)
22633 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22634 " from DIE at %s [in module %s]"),
22635 hex_string (signature
), sect_offset_str (die
->sect_off
),
22636 objfile_name (dwarf2_per_objfile
->objfile
));
22637 return build_error_marker_type (cu
, die
);
22640 /* If we already know the type we're done. */
22641 if (sig_type
->type
!= NULL
)
22642 return sig_type
->type
;
22645 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22646 if (type_die
!= NULL
)
22648 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22649 is created. This is important, for example, because for c++ classes
22650 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22651 type
= read_type_die (type_die
, type_cu
);
22654 complaint (_("Dwarf Error: Cannot build signatured type %s"
22655 " referenced from DIE at %s [in module %s]"),
22656 hex_string (signature
), sect_offset_str (die
->sect_off
),
22657 objfile_name (dwarf2_per_objfile
->objfile
));
22658 type
= build_error_marker_type (cu
, die
);
22663 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22664 " 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
);
22669 sig_type
->type
= type
;
22674 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22675 reading in and processing the type unit if necessary. */
22677 static struct type
*
22678 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22679 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22681 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22682 if (attr
->form_is_ref ())
22684 struct dwarf2_cu
*type_cu
= cu
;
22685 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22687 return read_type_die (type_die
, type_cu
);
22689 else if (attr
->form
== DW_FORM_ref_sig8
)
22691 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22695 struct dwarf2_per_objfile
*dwarf2_per_objfile
22696 = cu
->per_cu
->dwarf2_per_objfile
;
22698 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22699 " at %s [in module %s]"),
22700 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22701 objfile_name (dwarf2_per_objfile
->objfile
));
22702 return build_error_marker_type (cu
, die
);
22706 /* Load the DIEs associated with type unit PER_CU into memory. */
22709 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22711 struct signatured_type
*sig_type
;
22713 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22714 gdb_assert (! per_cu
->type_unit_group_p ());
22716 /* We have the per_cu, but we need the signatured_type.
22717 Fortunately this is an easy translation. */
22718 gdb_assert (per_cu
->is_debug_types
);
22719 sig_type
= (struct signatured_type
*) per_cu
;
22721 gdb_assert (per_cu
->cu
== NULL
);
22723 read_signatured_type (sig_type
);
22725 gdb_assert (per_cu
->cu
!= NULL
);
22728 /* Read in a signatured type and build its CU and DIEs.
22729 If the type is a stub for the real type in a DWO file,
22730 read in the real type from the DWO file as well. */
22733 read_signatured_type (struct signatured_type
*sig_type
)
22735 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22737 gdb_assert (per_cu
->is_debug_types
);
22738 gdb_assert (per_cu
->cu
== NULL
);
22740 cutu_reader
reader (per_cu
, NULL
, 0, false);
22742 if (!reader
.dummy_p
)
22744 struct dwarf2_cu
*cu
= reader
.cu
;
22745 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22747 gdb_assert (cu
->die_hash
== NULL
);
22749 htab_create_alloc_ex (cu
->header
.length
/ 12,
22753 &cu
->comp_unit_obstack
,
22754 hashtab_obstack_allocate
,
22755 dummy_obstack_deallocate
);
22757 if (reader
.comp_unit_die
->has_children
)
22758 reader
.comp_unit_die
->child
22759 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22760 reader
.comp_unit_die
);
22761 cu
->dies
= reader
.comp_unit_die
;
22762 /* comp_unit_die is not stored in die_hash, no need. */
22764 /* We try not to read any attributes in this function, because
22765 not all CUs needed for references have been loaded yet, and
22766 symbol table processing isn't initialized. But we have to
22767 set the CU language, or we won't be able to build types
22768 correctly. Similarly, if we do not read the producer, we can
22769 not apply producer-specific interpretation. */
22770 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22775 sig_type
->per_cu
.tu_read
= 1;
22778 /* Decode simple location descriptions.
22779 Given a pointer to a dwarf block that defines a location, compute
22780 the location and return the value. If COMPUTED is non-null, it is
22781 set to true to indicate that decoding was successful, and false
22782 otherwise. If COMPUTED is null, then this function may emit a
22786 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22788 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22790 size_t size
= blk
->size
;
22791 const gdb_byte
*data
= blk
->data
;
22792 CORE_ADDR stack
[64];
22794 unsigned int bytes_read
, unsnd
;
22797 if (computed
!= nullptr)
22803 stack
[++stacki
] = 0;
22842 stack
[++stacki
] = op
- DW_OP_lit0
;
22877 stack
[++stacki
] = op
- DW_OP_reg0
;
22880 if (computed
== nullptr)
22881 dwarf2_complex_location_expr_complaint ();
22888 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22890 stack
[++stacki
] = unsnd
;
22893 if (computed
== nullptr)
22894 dwarf2_complex_location_expr_complaint ();
22901 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22906 case DW_OP_const1u
:
22907 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22911 case DW_OP_const1s
:
22912 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22916 case DW_OP_const2u
:
22917 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22921 case DW_OP_const2s
:
22922 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22926 case DW_OP_const4u
:
22927 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22931 case DW_OP_const4s
:
22932 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22936 case DW_OP_const8u
:
22937 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22942 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22948 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22953 stack
[stacki
+ 1] = stack
[stacki
];
22958 stack
[stacki
- 1] += stack
[stacki
];
22962 case DW_OP_plus_uconst
:
22963 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22969 stack
[stacki
- 1] -= stack
[stacki
];
22974 /* If we're not the last op, then we definitely can't encode
22975 this using GDB's address_class enum. This is valid for partial
22976 global symbols, although the variable's address will be bogus
22980 if (computed
== nullptr)
22981 dwarf2_complex_location_expr_complaint ();
22987 case DW_OP_GNU_push_tls_address
:
22988 case DW_OP_form_tls_address
:
22989 /* The top of the stack has the offset from the beginning
22990 of the thread control block at which the variable is located. */
22991 /* Nothing should follow this operator, so the top of stack would
22993 /* This is valid for partial global symbols, but the variable's
22994 address will be bogus in the psymtab. Make it always at least
22995 non-zero to not look as a variable garbage collected by linker
22996 which have DW_OP_addr 0. */
22999 if (computed
== nullptr)
23000 dwarf2_complex_location_expr_complaint ();
23007 case DW_OP_GNU_uninit
:
23008 if (computed
!= nullptr)
23013 case DW_OP_GNU_addr_index
:
23014 case DW_OP_GNU_const_index
:
23015 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23021 if (computed
== nullptr)
23023 const char *name
= get_DW_OP_name (op
);
23026 complaint (_("unsupported stack op: '%s'"),
23029 complaint (_("unsupported stack op: '%02x'"),
23033 return (stack
[stacki
]);
23036 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23037 outside of the allocated space. Also enforce minimum>0. */
23038 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23040 if (computed
== nullptr)
23041 complaint (_("location description stack overflow"));
23047 if (computed
== nullptr)
23048 complaint (_("location description stack underflow"));
23053 if (computed
!= nullptr)
23055 return (stack
[stacki
]);
23058 /* memory allocation interface */
23060 static struct dwarf_block
*
23061 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23063 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23066 static struct die_info
*
23067 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23069 struct die_info
*die
;
23070 size_t size
= sizeof (struct die_info
);
23073 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23075 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23076 memset (die
, 0, sizeof (struct die_info
));
23082 /* Macro support. */
23084 /* An overload of dwarf_decode_macros that finds the correct section
23085 and ensures it is read in before calling the other overload. */
23088 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23089 int section_is_gnu
)
23091 struct dwarf2_per_objfile
*dwarf2_per_objfile
23092 = cu
->per_cu
->dwarf2_per_objfile
;
23093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23094 const struct line_header
*lh
= cu
->line_header
;
23095 unsigned int offset_size
= cu
->header
.offset_size
;
23096 struct dwarf2_section_info
*section
;
23097 const char *section_name
;
23099 if (cu
->dwo_unit
!= nullptr)
23101 if (section_is_gnu
)
23103 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23104 section_name
= ".debug_macro.dwo";
23108 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23109 section_name
= ".debug_macinfo.dwo";
23114 if (section_is_gnu
)
23116 section
= &dwarf2_per_objfile
->macro
;
23117 section_name
= ".debug_macro";
23121 section
= &dwarf2_per_objfile
->macinfo
;
23122 section_name
= ".debug_macinfo";
23126 section
->read (objfile
);
23127 if (section
->buffer
== nullptr)
23129 complaint (_("missing %s section"), section_name
);
23133 buildsym_compunit
*builder
= cu
->get_builder ();
23135 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23136 offset_size
, offset
, section_is_gnu
);
23139 /* Return the .debug_loc section to use for CU.
23140 For DWO files use .debug_loc.dwo. */
23142 static struct dwarf2_section_info
*
23143 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23145 struct dwarf2_per_objfile
*dwarf2_per_objfile
23146 = cu
->per_cu
->dwarf2_per_objfile
;
23150 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23152 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23154 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23155 : &dwarf2_per_objfile
->loc
);
23158 /* A helper function that fills in a dwarf2_loclist_baton. */
23161 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23162 struct dwarf2_loclist_baton
*baton
,
23163 const struct attribute
*attr
)
23165 struct dwarf2_per_objfile
*dwarf2_per_objfile
23166 = cu
->per_cu
->dwarf2_per_objfile
;
23167 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23169 section
->read (dwarf2_per_objfile
->objfile
);
23171 baton
->per_cu
= cu
->per_cu
;
23172 gdb_assert (baton
->per_cu
);
23173 /* We don't know how long the location list is, but make sure we
23174 don't run off the edge of the section. */
23175 baton
->size
= section
->size
- DW_UNSND (attr
);
23176 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23177 if (cu
->base_address
.has_value ())
23178 baton
->base_address
= *cu
->base_address
;
23180 baton
->base_address
= 0;
23181 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23185 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23186 struct dwarf2_cu
*cu
, int is_block
)
23188 struct dwarf2_per_objfile
*dwarf2_per_objfile
23189 = cu
->per_cu
->dwarf2_per_objfile
;
23190 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23191 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23193 if (attr
->form_is_section_offset ()
23194 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23195 the section. If so, fall through to the complaint in the
23197 && DW_UNSND (attr
) < section
->get_size (objfile
))
23199 struct dwarf2_loclist_baton
*baton
;
23201 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23203 fill_in_loclist_baton (cu
, baton
, attr
);
23205 if (!cu
->base_address
.has_value ())
23206 complaint (_("Location list used without "
23207 "specifying the CU base address."));
23209 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23210 ? dwarf2_loclist_block_index
23211 : dwarf2_loclist_index
);
23212 SYMBOL_LOCATION_BATON (sym
) = baton
;
23216 struct dwarf2_locexpr_baton
*baton
;
23218 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23219 baton
->per_cu
= cu
->per_cu
;
23220 gdb_assert (baton
->per_cu
);
23222 if (attr
->form_is_block ())
23224 /* Note that we're just copying the block's data pointer
23225 here, not the actual data. We're still pointing into the
23226 info_buffer for SYM's objfile; right now we never release
23227 that buffer, but when we do clean up properly this may
23229 baton
->size
= DW_BLOCK (attr
)->size
;
23230 baton
->data
= DW_BLOCK (attr
)->data
;
23234 dwarf2_invalid_attrib_class_complaint ("location description",
23235 sym
->natural_name ());
23239 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23240 ? dwarf2_locexpr_block_index
23241 : dwarf2_locexpr_index
);
23242 SYMBOL_LOCATION_BATON (sym
) = baton
;
23249 dwarf2_per_cu_data::objfile () const
23251 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23253 /* Return the master objfile, so that we can report and look up the
23254 correct file containing this variable. */
23255 if (objfile
->separate_debug_objfile_backlink
)
23256 objfile
= objfile
->separate_debug_objfile_backlink
;
23261 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23262 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23263 CU_HEADERP first. */
23265 static const struct comp_unit_head
*
23266 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23267 const struct dwarf2_per_cu_data
*per_cu
)
23269 const gdb_byte
*info_ptr
;
23272 return &per_cu
->cu
->header
;
23274 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23276 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23277 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23278 rcuh_kind::COMPILE
);
23286 dwarf2_per_cu_data::addr_size () const
23288 struct comp_unit_head cu_header_local
;
23289 const struct comp_unit_head
*cu_headerp
;
23291 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23293 return cu_headerp
->addr_size
;
23299 dwarf2_per_cu_data::offset_size () const
23301 struct comp_unit_head cu_header_local
;
23302 const struct comp_unit_head
*cu_headerp
;
23304 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23306 return cu_headerp
->offset_size
;
23312 dwarf2_per_cu_data::ref_addr_size () const
23314 struct comp_unit_head cu_header_local
;
23315 const struct comp_unit_head
*cu_headerp
;
23317 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23319 if (cu_headerp
->version
== 2)
23320 return cu_headerp
->addr_size
;
23322 return cu_headerp
->offset_size
;
23328 dwarf2_per_cu_data::text_offset () const
23330 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23332 return objfile
->text_section_offset ();
23338 dwarf2_per_cu_data::addr_type () const
23340 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23341 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23342 struct type
*addr_type
= lookup_pointer_type (void_type
);
23343 int addr_size
= this->addr_size ();
23345 if (TYPE_LENGTH (addr_type
) == addr_size
)
23348 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23352 /* A helper function for dwarf2_find_containing_comp_unit that returns
23353 the index of the result, and that searches a vector. It will
23354 return a result even if the offset in question does not actually
23355 occur in any CU. This is separate so that it can be unit
23359 dwarf2_find_containing_comp_unit
23360 (sect_offset sect_off
,
23361 unsigned int offset_in_dwz
,
23362 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23367 high
= all_comp_units
.size () - 1;
23370 struct dwarf2_per_cu_data
*mid_cu
;
23371 int mid
= low
+ (high
- low
) / 2;
23373 mid_cu
= all_comp_units
[mid
];
23374 if (mid_cu
->is_dwz
> offset_in_dwz
23375 || (mid_cu
->is_dwz
== offset_in_dwz
23376 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23381 gdb_assert (low
== high
);
23385 /* Locate the .debug_info compilation unit from CU's objfile which contains
23386 the DIE at OFFSET. Raises an error on failure. */
23388 static struct dwarf2_per_cu_data
*
23389 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23390 unsigned int offset_in_dwz
,
23391 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23394 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23395 dwarf2_per_objfile
->all_comp_units
);
23396 struct dwarf2_per_cu_data
*this_cu
23397 = dwarf2_per_objfile
->all_comp_units
[low
];
23399 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23401 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23402 error (_("Dwarf Error: could not find partial DIE containing "
23403 "offset %s [in module %s]"),
23404 sect_offset_str (sect_off
),
23405 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23407 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23409 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23413 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23414 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23415 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23416 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23423 namespace selftests
{
23424 namespace find_containing_comp_unit
{
23429 struct dwarf2_per_cu_data one
{};
23430 struct dwarf2_per_cu_data two
{};
23431 struct dwarf2_per_cu_data three
{};
23432 struct dwarf2_per_cu_data four
{};
23435 two
.sect_off
= sect_offset (one
.length
);
23440 four
.sect_off
= sect_offset (three
.length
);
23444 std::vector
<dwarf2_per_cu_data
*> units
;
23445 units
.push_back (&one
);
23446 units
.push_back (&two
);
23447 units
.push_back (&three
);
23448 units
.push_back (&four
);
23452 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23453 SELF_CHECK (units
[result
] == &one
);
23454 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23455 SELF_CHECK (units
[result
] == &one
);
23456 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23457 SELF_CHECK (units
[result
] == &two
);
23459 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23460 SELF_CHECK (units
[result
] == &three
);
23461 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23462 SELF_CHECK (units
[result
] == &three
);
23463 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23464 SELF_CHECK (units
[result
] == &four
);
23470 #endif /* GDB_SELF_TEST */
23472 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23474 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23475 : per_cu (per_cu_
),
23477 has_loclist (false),
23478 checked_producer (false),
23479 producer_is_gxx_lt_4_6 (false),
23480 producer_is_gcc_lt_4_3 (false),
23481 producer_is_icc (false),
23482 producer_is_icc_lt_14 (false),
23483 producer_is_codewarrior (false),
23484 processing_has_namespace_info (false)
23489 /* Destroy a dwarf2_cu. */
23491 dwarf2_cu::~dwarf2_cu ()
23496 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23499 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23500 enum language pretend_language
)
23502 struct attribute
*attr
;
23504 /* Set the language we're debugging. */
23505 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23506 if (attr
!= nullptr)
23507 set_cu_language (DW_UNSND (attr
), cu
);
23510 cu
->language
= pretend_language
;
23511 cu
->language_defn
= language_def (cu
->language
);
23514 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23517 /* Increase the age counter on each cached compilation unit, and free
23518 any that are too old. */
23521 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23523 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23525 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23526 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23527 while (per_cu
!= NULL
)
23529 per_cu
->cu
->last_used
++;
23530 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23531 dwarf2_mark (per_cu
->cu
);
23532 per_cu
= per_cu
->cu
->read_in_chain
;
23535 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23536 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23537 while (per_cu
!= NULL
)
23539 struct dwarf2_per_cu_data
*next_cu
;
23541 next_cu
= per_cu
->cu
->read_in_chain
;
23543 if (!per_cu
->cu
->mark
)
23546 *last_chain
= next_cu
;
23549 last_chain
= &per_cu
->cu
->read_in_chain
;
23555 /* Remove a single compilation unit from the cache. */
23558 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23560 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23561 struct dwarf2_per_objfile
*dwarf2_per_objfile
23562 = target_per_cu
->dwarf2_per_objfile
;
23564 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23565 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23566 while (per_cu
!= NULL
)
23568 struct dwarf2_per_cu_data
*next_cu
;
23570 next_cu
= per_cu
->cu
->read_in_chain
;
23572 if (per_cu
== target_per_cu
)
23576 *last_chain
= next_cu
;
23580 last_chain
= &per_cu
->cu
->read_in_chain
;
23586 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23587 We store these in a hash table separate from the DIEs, and preserve them
23588 when the DIEs are flushed out of cache.
23590 The CU "per_cu" pointer is needed because offset alone is not enough to
23591 uniquely identify the type. A file may have multiple .debug_types sections,
23592 or the type may come from a DWO file. Furthermore, while it's more logical
23593 to use per_cu->section+offset, with Fission the section with the data is in
23594 the DWO file but we don't know that section at the point we need it.
23595 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23596 because we can enter the lookup routine, get_die_type_at_offset, from
23597 outside this file, and thus won't necessarily have PER_CU->cu.
23598 Fortunately, PER_CU is stable for the life of the objfile. */
23600 struct dwarf2_per_cu_offset_and_type
23602 const struct dwarf2_per_cu_data
*per_cu
;
23603 sect_offset sect_off
;
23607 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23610 per_cu_offset_and_type_hash (const void *item
)
23612 const struct dwarf2_per_cu_offset_and_type
*ofs
23613 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23615 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23618 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23621 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23623 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23624 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23625 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23626 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23628 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23629 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23632 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23633 table if necessary. For convenience, return TYPE.
23635 The DIEs reading must have careful ordering to:
23636 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23637 reading current DIE.
23638 * Not trying to dereference contents of still incompletely read in types
23639 while reading in other DIEs.
23640 * Enable referencing still incompletely read in types just by a pointer to
23641 the type without accessing its fields.
23643 Therefore caller should follow these rules:
23644 * Try to fetch any prerequisite types we may need to build this DIE type
23645 before building the type and calling set_die_type.
23646 * After building type call set_die_type for current DIE as soon as
23647 possible before fetching more types to complete the current type.
23648 * Make the type as complete as possible before fetching more types. */
23650 static struct type
*
23651 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23653 struct dwarf2_per_objfile
*dwarf2_per_objfile
23654 = cu
->per_cu
->dwarf2_per_objfile
;
23655 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23656 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23657 struct attribute
*attr
;
23658 struct dynamic_prop prop
;
23660 /* For Ada types, make sure that the gnat-specific data is always
23661 initialized (if not already set). There are a few types where
23662 we should not be doing so, because the type-specific area is
23663 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23664 where the type-specific area is used to store the floatformat).
23665 But this is not a problem, because the gnat-specific information
23666 is actually not needed for these types. */
23667 if (need_gnat_info (cu
)
23668 && type
->code () != TYPE_CODE_FUNC
23669 && type
->code () != TYPE_CODE_FLT
23670 && type
->code () != TYPE_CODE_METHODPTR
23671 && type
->code () != TYPE_CODE_MEMBERPTR
23672 && type
->code () != TYPE_CODE_METHOD
23673 && !HAVE_GNAT_AUX_INFO (type
))
23674 INIT_GNAT_SPECIFIC (type
);
23676 /* Read DW_AT_allocated and set in type. */
23677 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23678 if (attr
!= NULL
&& attr
->form_is_block ())
23680 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23681 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23682 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23684 else if (attr
!= NULL
)
23686 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23687 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23688 sect_offset_str (die
->sect_off
));
23691 /* Read DW_AT_associated and set in type. */
23692 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23693 if (attr
!= NULL
&& attr
->form_is_block ())
23695 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23696 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23697 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23699 else if (attr
!= NULL
)
23701 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23702 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23703 sect_offset_str (die
->sect_off
));
23706 /* Read DW_AT_data_location and set in type. */
23707 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23708 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23709 cu
->per_cu
->addr_type ()))
23710 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23712 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23713 dwarf2_per_objfile
->die_type_hash
23714 = htab_up (htab_create_alloc (127,
23715 per_cu_offset_and_type_hash
,
23716 per_cu_offset_and_type_eq
,
23717 NULL
, xcalloc
, xfree
));
23719 ofs
.per_cu
= cu
->per_cu
;
23720 ofs
.sect_off
= die
->sect_off
;
23722 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23723 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23725 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23726 sect_offset_str (die
->sect_off
));
23727 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23728 struct dwarf2_per_cu_offset_and_type
);
23733 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23734 or return NULL if the die does not have a saved type. */
23736 static struct type
*
23737 get_die_type_at_offset (sect_offset sect_off
,
23738 struct dwarf2_per_cu_data
*per_cu
)
23740 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23741 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23743 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23746 ofs
.per_cu
= per_cu
;
23747 ofs
.sect_off
= sect_off
;
23748 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23749 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23756 /* Look up the type for DIE in CU in die_type_hash,
23757 or return NULL if DIE does not have a saved type. */
23759 static struct type
*
23760 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23762 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23765 /* Add a dependence relationship from CU to REF_PER_CU. */
23768 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23769 struct dwarf2_per_cu_data
*ref_per_cu
)
23773 if (cu
->dependencies
== NULL
)
23775 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23776 NULL
, &cu
->comp_unit_obstack
,
23777 hashtab_obstack_allocate
,
23778 dummy_obstack_deallocate
);
23780 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23782 *slot
= ref_per_cu
;
23785 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23786 Set the mark field in every compilation unit in the
23787 cache that we must keep because we are keeping CU. */
23790 dwarf2_mark_helper (void **slot
, void *data
)
23792 struct dwarf2_per_cu_data
*per_cu
;
23794 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23796 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23797 reading of the chain. As such dependencies remain valid it is not much
23798 useful to track and undo them during QUIT cleanups. */
23799 if (per_cu
->cu
== NULL
)
23802 if (per_cu
->cu
->mark
)
23804 per_cu
->cu
->mark
= true;
23806 if (per_cu
->cu
->dependencies
!= NULL
)
23807 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23812 /* Set the mark field in CU and in every other compilation unit in the
23813 cache that we must keep because we are keeping CU. */
23816 dwarf2_mark (struct dwarf2_cu
*cu
)
23821 if (cu
->dependencies
!= NULL
)
23822 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23826 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23830 per_cu
->cu
->mark
= false;
23831 per_cu
= per_cu
->cu
->read_in_chain
;
23835 /* Trivial hash function for partial_die_info: the hash value of a DIE
23836 is its offset in .debug_info for this objfile. */
23839 partial_die_hash (const void *item
)
23841 const struct partial_die_info
*part_die
23842 = (const struct partial_die_info
*) item
;
23844 return to_underlying (part_die
->sect_off
);
23847 /* Trivial comparison function for partial_die_info structures: two DIEs
23848 are equal if they have the same offset. */
23851 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23853 const struct partial_die_info
*part_die_lhs
23854 = (const struct partial_die_info
*) item_lhs
;
23855 const struct partial_die_info
*part_die_rhs
23856 = (const struct partial_die_info
*) item_rhs
;
23858 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23861 struct cmd_list_element
*set_dwarf_cmdlist
;
23862 struct cmd_list_element
*show_dwarf_cmdlist
;
23865 show_check_physname (struct ui_file
*file
, int from_tty
,
23866 struct cmd_list_element
*c
, const char *value
)
23868 fprintf_filtered (file
,
23869 _("Whether to check \"physname\" is %s.\n"),
23873 void _initialize_dwarf2_read ();
23875 _initialize_dwarf2_read ()
23877 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23878 Set DWARF specific variables.\n\
23879 Configure DWARF variables such as the cache size."),
23880 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23881 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23883 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23884 Show DWARF specific variables.\n\
23885 Show DWARF variables such as the cache size."),
23886 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23887 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23889 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23890 &dwarf_max_cache_age
, _("\
23891 Set the upper bound on the age of cached DWARF compilation units."), _("\
23892 Show the upper bound on the age of cached DWARF compilation units."), _("\
23893 A higher limit means that cached compilation units will be stored\n\
23894 in memory longer, and more total memory will be used. Zero disables\n\
23895 caching, which can slow down startup."),
23897 show_dwarf_max_cache_age
,
23898 &set_dwarf_cmdlist
,
23899 &show_dwarf_cmdlist
);
23901 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23902 Set debugging of the DWARF reader."), _("\
23903 Show debugging of the DWARF reader."), _("\
23904 When enabled (non-zero), debugging messages are printed during DWARF\n\
23905 reading and symtab expansion. A value of 1 (one) provides basic\n\
23906 information. A value greater than 1 provides more verbose information."),
23909 &setdebuglist
, &showdebuglist
);
23911 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23912 Set debugging of the DWARF DIE reader."), _("\
23913 Show debugging of the DWARF DIE reader."), _("\
23914 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23915 The value is the maximum depth to print."),
23918 &setdebuglist
, &showdebuglist
);
23920 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23921 Set debugging of the dwarf line reader."), _("\
23922 Show debugging of the dwarf line reader."), _("\
23923 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23924 A value of 1 (one) provides basic information.\n\
23925 A value greater than 1 provides more verbose information."),
23928 &setdebuglist
, &showdebuglist
);
23930 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23931 Set cross-checking of \"physname\" code against demangler."), _("\
23932 Show cross-checking of \"physname\" code against demangler."), _("\
23933 When enabled, GDB's internal \"physname\" code is checked against\n\
23935 NULL
, show_check_physname
,
23936 &setdebuglist
, &showdebuglist
);
23938 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23939 no_class
, &use_deprecated_index_sections
, _("\
23940 Set whether to use deprecated gdb_index sections."), _("\
23941 Show whether to use deprecated gdb_index sections."), _("\
23942 When enabled, deprecated .gdb_index sections are used anyway.\n\
23943 Normally they are ignored either because of a missing feature or\n\
23944 performance issue.\n\
23945 Warning: This option must be enabled before gdb reads the file."),
23948 &setlist
, &showlist
);
23950 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23951 &dwarf2_locexpr_funcs
);
23952 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23953 &dwarf2_loclist_funcs
);
23955 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23956 &dwarf2_block_frame_base_locexpr_funcs
);
23957 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23958 &dwarf2_block_frame_base_loclist_funcs
);
23961 selftests::register_test ("dw2_expand_symtabs_matching",
23962 selftests::dw2_expand_symtabs_matching::run_test
);
23963 selftests::register_test ("dwarf2_find_containing_comp_unit",
23964 selftests::find_containing_comp_unit::run_test
);