1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2018 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. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "completer.h"
63 #include "gdbcore.h" /* for gnutarget */
64 #include "gdb/gdb-index.h"
69 #include "filestuff.h"
71 #include "namespace.h"
72 #include "common/gdb_unlinker.h"
73 #include "common/function-view.h"
74 #include "common/gdb_optional.h"
75 #include "common/underlying.h"
76 #include "common/byte-vector.h"
77 #include "common/hash_enum.h"
78 #include "filename-seen-cache.h"
81 #include <sys/types.h>
83 #include <unordered_set>
84 #include <unordered_map>
88 #include <forward_list>
90 /* When == 1, print basic high level tracing messages.
91 When > 1, be more verbose.
92 This is in contrast to the low level DIE reading of dwarf_die_debug. */
93 static unsigned int dwarf_read_debug
= 0;
95 /* When non-zero, dump DIEs after they are read in. */
96 static unsigned int dwarf_die_debug
= 0;
98 /* When non-zero, dump line number entries as they are read in. */
99 static unsigned int dwarf_line_debug
= 0;
101 /* When non-zero, cross-check physname against demangler. */
102 static int check_physname
= 0;
104 /* When non-zero, do not reject deprecated .gdb_index sections. */
105 static int use_deprecated_index_sections
= 0;
107 static const struct objfile_data
*dwarf2_objfile_data_key
;
109 /* The "aclass" indices for various kinds of computed DWARF symbols. */
111 static int dwarf2_locexpr_index
;
112 static int dwarf2_loclist_index
;
113 static int dwarf2_locexpr_block_index
;
114 static int dwarf2_loclist_block_index
;
116 /* A descriptor for dwarf sections.
118 S.ASECTION, SIZE are typically initialized when the objfile is first
119 scanned. BUFFER, READIN are filled in later when the section is read.
120 If the section contained compressed data then SIZE is updated to record
121 the uncompressed size of the section.
123 DWP file format V2 introduces a wrinkle that is easiest to handle by
124 creating the concept of virtual sections contained within a real section.
125 In DWP V2 the sections of the input DWO files are concatenated together
126 into one section, but section offsets are kept relative to the original
128 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
129 the real section this "virtual" section is contained in, and BUFFER,SIZE
130 describe the virtual section. */
132 struct dwarf2_section_info
136 /* If this is a real section, the bfd section. */
138 /* If this is a virtual section, pointer to the containing ("real")
140 struct dwarf2_section_info
*containing_section
;
142 /* Pointer to section data, only valid if readin. */
143 const gdb_byte
*buffer
;
144 /* The size of the section, real or virtual. */
146 /* If this is a virtual section, the offset in the real section.
147 Only valid if is_virtual. */
148 bfd_size_type virtual_offset
;
149 /* True if we have tried to read this section. */
151 /* True if this is a virtual section, False otherwise.
152 This specifies which of s.section and s.containing_section to use. */
156 typedef struct dwarf2_section_info dwarf2_section_info_def
;
157 DEF_VEC_O (dwarf2_section_info_def
);
159 /* All offsets in the index are of this type. It must be
160 architecture-independent. */
161 typedef uint32_t offset_type
;
163 DEF_VEC_I (offset_type
);
165 /* Ensure only legit values are used. */
166 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
168 gdb_assert ((unsigned int) (value) <= 1); \
169 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
172 /* Ensure only legit values are used. */
173 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
175 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
176 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
177 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
180 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
181 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
183 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
184 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
189 /* Convert VALUE between big- and little-endian. */
192 byte_swap (offset_type value
)
196 result
= (value
& 0xff) << 24;
197 result
|= (value
& 0xff00) << 8;
198 result
|= (value
& 0xff0000) >> 8;
199 result
|= (value
& 0xff000000) >> 24;
203 #define MAYBE_SWAP(V) byte_swap (V)
206 #define MAYBE_SWAP(V) static_cast<offset_type> (V)
207 #endif /* WORDS_BIGENDIAN */
209 /* An index into a (C++) symbol name component in a symbol name as
210 recorded in the mapped_index's symbol table. For each C++ symbol
211 in the symbol table, we record one entry for the start of each
212 component in the symbol in a table of name components, and then
213 sort the table, in order to be able to binary search symbol names,
214 ignoring leading namespaces, both completion and regular look up.
215 For example, for symbol "A::B::C", we'll have an entry that points
216 to "A::B::C", another that points to "B::C", and another for "C".
217 Note that function symbols in GDB index have no parameter
218 information, just the function/method names. You can convert a
219 name_component to a "const char *" using the
220 'mapped_index::symbol_name_at(offset_type)' method. */
222 struct name_component
224 /* Offset in the symbol name where the component starts. Stored as
225 a (32-bit) offset instead of a pointer to save memory and improve
226 locality on 64-bit architectures. */
227 offset_type name_offset
;
229 /* The symbol's index in the symbol and constant pool tables of a
234 /* Base class containing bits shared by both .gdb_index and
235 .debug_name indexes. */
237 struct mapped_index_base
239 /* The name_component table (a sorted vector). See name_component's
240 description above. */
241 std::vector
<name_component
> name_components
;
243 /* How NAME_COMPONENTS is sorted. */
244 enum case_sensitivity name_components_casing
;
246 /* Return the number of names in the symbol table. */
247 virtual size_t symbol_name_count () const = 0;
249 /* Get the name of the symbol at IDX in the symbol table. */
250 virtual const char *symbol_name_at (offset_type idx
) const = 0;
252 /* Return whether the name at IDX in the symbol table should be
254 virtual bool symbol_name_slot_invalid (offset_type idx
) const
259 /* Build the symbol name component sorted vector, if we haven't
261 void build_name_components ();
263 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
264 possible matches for LN_NO_PARAMS in the name component
266 std::pair
<std::vector
<name_component
>::const_iterator
,
267 std::vector
<name_component
>::const_iterator
>
268 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
270 /* Prevent deleting/destroying via a base class pointer. */
272 ~mapped_index_base() = default;
275 /* A description of the mapped index. The file format is described in
276 a comment by the code that writes the index. */
277 struct mapped_index final
: public mapped_index_base
279 /* A slot/bucket in the symbol table hash. */
280 struct symbol_table_slot
282 const offset_type name
;
283 const offset_type vec
;
286 /* Index data format version. */
289 /* The total length of the buffer. */
292 /* The address table data. */
293 gdb::array_view
<const gdb_byte
> address_table
;
295 /* The symbol table, implemented as a hash table. */
296 gdb::array_view
<symbol_table_slot
> symbol_table
;
298 /* A pointer to the constant pool. */
299 const char *constant_pool
;
301 bool symbol_name_slot_invalid (offset_type idx
) const override
303 const auto &bucket
= this->symbol_table
[idx
];
304 return bucket
.name
== 0 && bucket
.vec
;
307 /* Convenience method to get at the name of the symbol at IDX in the
309 const char *symbol_name_at (offset_type idx
) const override
310 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
312 size_t symbol_name_count () const override
313 { return this->symbol_table
.size (); }
316 /* A description of the mapped .debug_names.
317 Uninitialized map has CU_COUNT 0. */
318 struct mapped_debug_names final
: public mapped_index_base
320 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
321 : dwarf2_per_objfile (dwarf2_per_objfile_
)
324 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
325 bfd_endian dwarf5_byte_order
;
326 bool dwarf5_is_dwarf64
;
327 bool augmentation_is_gdb
;
329 uint32_t cu_count
= 0;
330 uint32_t tu_count
, bucket_count
, name_count
;
331 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
332 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
333 const gdb_byte
*name_table_string_offs_reordered
;
334 const gdb_byte
*name_table_entry_offs_reordered
;
335 const gdb_byte
*entry_pool
;
342 /* Attribute name DW_IDX_*. */
345 /* Attribute form DW_FORM_*. */
348 /* Value if FORM is DW_FORM_implicit_const. */
349 LONGEST implicit_const
;
351 std::vector
<attr
> attr_vec
;
354 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
356 const char *namei_to_name (uint32_t namei
) const;
358 /* Implementation of the mapped_index_base virtual interface, for
359 the name_components cache. */
361 const char *symbol_name_at (offset_type idx
) const override
362 { return namei_to_name (idx
); }
364 size_t symbol_name_count () const override
365 { return this->name_count
; }
368 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
369 DEF_VEC_P (dwarf2_per_cu_ptr
);
373 int nr_uniq_abbrev_tables
;
375 int nr_symtab_sharers
;
376 int nr_stmt_less_type_units
;
377 int nr_all_type_units_reallocs
;
380 /* Collection of data recorded per objfile.
381 This hangs off of dwarf2_objfile_data_key. */
383 struct dwarf2_per_objfile
385 /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the
386 dwarf2 section names, or is NULL if the standard ELF names are
388 dwarf2_per_objfile (struct objfile
*objfile
,
389 const dwarf2_debug_sections
*names
);
391 ~dwarf2_per_objfile ();
393 DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile
);
395 /* Free all cached compilation units. */
396 void free_cached_comp_units ();
398 /* This function is mapped across the sections and remembers the
399 offset and size of each of the debugging sections we are
401 void locate_sections (bfd
*abfd
, asection
*sectp
,
402 const dwarf2_debug_sections
&names
);
405 dwarf2_section_info info
{};
406 dwarf2_section_info abbrev
{};
407 dwarf2_section_info line
{};
408 dwarf2_section_info loc
{};
409 dwarf2_section_info loclists
{};
410 dwarf2_section_info macinfo
{};
411 dwarf2_section_info macro
{};
412 dwarf2_section_info str
{};
413 dwarf2_section_info line_str
{};
414 dwarf2_section_info ranges
{};
415 dwarf2_section_info rnglists
{};
416 dwarf2_section_info addr
{};
417 dwarf2_section_info frame
{};
418 dwarf2_section_info eh_frame
{};
419 dwarf2_section_info gdb_index
{};
420 dwarf2_section_info debug_names
{};
421 dwarf2_section_info debug_aranges
{};
423 VEC (dwarf2_section_info_def
) *types
= NULL
;
426 struct objfile
*objfile
= NULL
;
428 /* Table of all the compilation units. This is used to locate
429 the target compilation unit of a particular reference. */
430 struct dwarf2_per_cu_data
**all_comp_units
= NULL
;
432 /* The number of compilation units in ALL_COMP_UNITS. */
433 int n_comp_units
= 0;
435 /* The number of .debug_types-related CUs. */
436 int n_type_units
= 0;
438 /* The number of elements allocated in all_type_units.
439 If there are skeleton-less TUs, we add them to all_type_units lazily. */
440 int n_allocated_type_units
= 0;
442 /* The .debug_types-related CUs (TUs).
443 This is stored in malloc space because we may realloc it. */
444 struct signatured_type
**all_type_units
= NULL
;
446 /* Table of struct type_unit_group objects.
447 The hash key is the DW_AT_stmt_list value. */
448 htab_t type_unit_groups
{};
450 /* A table mapping .debug_types signatures to its signatured_type entry.
451 This is NULL if the .debug_types section hasn't been read in yet. */
452 htab_t signatured_types
{};
454 /* Type unit statistics, to see how well the scaling improvements
456 struct tu_stats tu_stats
{};
458 /* A chain of compilation units that are currently read in, so that
459 they can be freed later. */
460 dwarf2_per_cu_data
*read_in_chain
= NULL
;
462 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
463 This is NULL if the table hasn't been allocated yet. */
466 /* True if we've checked for whether there is a DWP file. */
467 bool dwp_checked
= false;
469 /* The DWP file if there is one, or NULL. */
470 struct dwp_file
*dwp_file
= NULL
;
472 /* The shared '.dwz' file, if one exists. This is used when the
473 original data was compressed using 'dwz -m'. */
474 struct dwz_file
*dwz_file
= NULL
;
476 /* A flag indicating whether this objfile has a section loaded at a
478 bool has_section_at_zero
= false;
480 /* True if we are using the mapped index,
481 or we are faking it for OBJF_READNOW's sake. */
482 bool using_index
= false;
484 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
485 mapped_index
*index_table
= NULL
;
487 /* The mapped index, or NULL if .debug_names is missing or not being used. */
488 std::unique_ptr
<mapped_debug_names
> debug_names_table
;
490 /* When using index_table, this keeps track of all quick_file_names entries.
491 TUs typically share line table entries with a CU, so we maintain a
492 separate table of all line table entries to support the sharing.
493 Note that while there can be way more TUs than CUs, we've already
494 sorted all the TUs into "type unit groups", grouped by their
495 DW_AT_stmt_list value. Therefore the only sharing done here is with a
496 CU and its associated TU group if there is one. */
497 htab_t quick_file_names_table
{};
499 /* Set during partial symbol reading, to prevent queueing of full
501 bool reading_partial_symbols
= false;
503 /* Table mapping type DIEs to their struct type *.
504 This is NULL if not allocated yet.
505 The mapping is done via (CU/TU + DIE offset) -> type. */
506 htab_t die_type_hash
{};
508 /* The CUs we recently read. */
509 VEC (dwarf2_per_cu_ptr
) *just_read_cus
= NULL
;
511 /* Table containing line_header indexed by offset and offset_in_dwz. */
512 htab_t line_header_hash
{};
514 /* Table containing all filenames. This is an optional because the
515 table is lazily constructed on first access. */
516 gdb::optional
<filename_seen_cache
> filenames_cache
;
519 /* Get the dwarf2_per_objfile associated to OBJFILE. */
521 struct dwarf2_per_objfile
*
522 get_dwarf2_per_objfile (struct objfile
*objfile
)
524 return ((struct dwarf2_per_objfile
*)
525 objfile_data (objfile
, dwarf2_objfile_data_key
));
528 /* Set the dwarf2_per_objfile associated to OBJFILE. */
531 set_dwarf2_per_objfile (struct objfile
*objfile
,
532 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
534 gdb_assert (get_dwarf2_per_objfile (objfile
) == NULL
);
535 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
538 /* Default names of the debugging sections. */
540 /* Note that if the debugging section has been compressed, it might
541 have a name like .zdebug_info. */
543 static const struct dwarf2_debug_sections dwarf2_elf_names
=
545 { ".debug_info", ".zdebug_info" },
546 { ".debug_abbrev", ".zdebug_abbrev" },
547 { ".debug_line", ".zdebug_line" },
548 { ".debug_loc", ".zdebug_loc" },
549 { ".debug_loclists", ".zdebug_loclists" },
550 { ".debug_macinfo", ".zdebug_macinfo" },
551 { ".debug_macro", ".zdebug_macro" },
552 { ".debug_str", ".zdebug_str" },
553 { ".debug_line_str", ".zdebug_line_str" },
554 { ".debug_ranges", ".zdebug_ranges" },
555 { ".debug_rnglists", ".zdebug_rnglists" },
556 { ".debug_types", ".zdebug_types" },
557 { ".debug_addr", ".zdebug_addr" },
558 { ".debug_frame", ".zdebug_frame" },
559 { ".eh_frame", NULL
},
560 { ".gdb_index", ".zgdb_index" },
561 { ".debug_names", ".zdebug_names" },
562 { ".debug_aranges", ".zdebug_aranges" },
566 /* List of DWO/DWP sections. */
568 static const struct dwop_section_names
570 struct dwarf2_section_names abbrev_dwo
;
571 struct dwarf2_section_names info_dwo
;
572 struct dwarf2_section_names line_dwo
;
573 struct dwarf2_section_names loc_dwo
;
574 struct dwarf2_section_names loclists_dwo
;
575 struct dwarf2_section_names macinfo_dwo
;
576 struct dwarf2_section_names macro_dwo
;
577 struct dwarf2_section_names str_dwo
;
578 struct dwarf2_section_names str_offsets_dwo
;
579 struct dwarf2_section_names types_dwo
;
580 struct dwarf2_section_names cu_index
;
581 struct dwarf2_section_names tu_index
;
585 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
586 { ".debug_info.dwo", ".zdebug_info.dwo" },
587 { ".debug_line.dwo", ".zdebug_line.dwo" },
588 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
589 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
590 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
591 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
592 { ".debug_str.dwo", ".zdebug_str.dwo" },
593 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
594 { ".debug_types.dwo", ".zdebug_types.dwo" },
595 { ".debug_cu_index", ".zdebug_cu_index" },
596 { ".debug_tu_index", ".zdebug_tu_index" },
599 /* local data types */
601 /* The data in a compilation unit header, after target2host
602 translation, looks like this. */
603 struct comp_unit_head
607 unsigned char addr_size
;
608 unsigned char signed_addr_p
;
609 sect_offset abbrev_sect_off
;
611 /* Size of file offsets; either 4 or 8. */
612 unsigned int offset_size
;
614 /* Size of the length field; either 4 or 12. */
615 unsigned int initial_length_size
;
617 enum dwarf_unit_type unit_type
;
619 /* Offset to the first byte of this compilation unit header in the
620 .debug_info section, for resolving relative reference dies. */
621 sect_offset sect_off
;
623 /* Offset to first die in this cu from the start of the cu.
624 This will be the first byte following the compilation unit header. */
625 cu_offset first_die_cu_offset
;
627 /* 64-bit signature of this type unit - it is valid only for
628 UNIT_TYPE DW_UT_type. */
631 /* For types, offset in the type's DIE of the type defined by this TU. */
632 cu_offset type_cu_offset_in_tu
;
635 /* Type used for delaying computation of method physnames.
636 See comments for compute_delayed_physnames. */
637 struct delayed_method_info
639 /* The type to which the method is attached, i.e., its parent class. */
642 /* The index of the method in the type's function fieldlists. */
645 /* The index of the method in the fieldlist. */
648 /* The name of the DIE. */
651 /* The DIE associated with this method. */
652 struct die_info
*die
;
655 /* Internal state when decoding a particular compilation unit. */
658 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
661 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
663 /* The header of the compilation unit. */
664 struct comp_unit_head header
{};
666 /* Base address of this compilation unit. */
667 CORE_ADDR base_address
= 0;
669 /* Non-zero if base_address has been set. */
672 /* The language we are debugging. */
673 enum language language
= language_unknown
;
674 const struct language_defn
*language_defn
= nullptr;
676 const char *producer
= nullptr;
678 /* The generic symbol table building routines have separate lists for
679 file scope symbols and all all other scopes (local scopes). So
680 we need to select the right one to pass to add_symbol_to_list().
681 We do it by keeping a pointer to the correct list in list_in_scope.
683 FIXME: The original dwarf code just treated the file scope as the
684 first local scope, and all other local scopes as nested local
685 scopes, and worked fine. Check to see if we really need to
686 distinguish these in buildsym.c. */
687 struct pending
**list_in_scope
= nullptr;
689 /* Hash table holding all the loaded partial DIEs
690 with partial_die->offset.SECT_OFF as hash. */
691 htab_t partial_dies
= nullptr;
693 /* Storage for things with the same lifetime as this read-in compilation
694 unit, including partial DIEs. */
695 auto_obstack comp_unit_obstack
;
697 /* When multiple dwarf2_cu structures are living in memory, this field
698 chains them all together, so that they can be released efficiently.
699 We will probably also want a generation counter so that most-recently-used
700 compilation units are cached... */
701 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
703 /* Backlink to our per_cu entry. */
704 struct dwarf2_per_cu_data
*per_cu
;
706 /* How many compilation units ago was this CU last referenced? */
709 /* A hash table of DIE cu_offset for following references with
710 die_info->offset.sect_off as hash. */
711 htab_t die_hash
= nullptr;
713 /* Full DIEs if read in. */
714 struct die_info
*dies
= nullptr;
716 /* A set of pointers to dwarf2_per_cu_data objects for compilation
717 units referenced by this one. Only set during full symbol processing;
718 partial symbol tables do not have dependencies. */
719 htab_t dependencies
= nullptr;
721 /* Header data from the line table, during full symbol processing. */
722 struct line_header
*line_header
= nullptr;
723 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
724 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
725 this is the DW_TAG_compile_unit die for this CU. We'll hold on
726 to the line header as long as this DIE is being processed. See
727 process_die_scope. */
728 die_info
*line_header_die_owner
= nullptr;
730 /* A list of methods which need to have physnames computed
731 after all type information has been read. */
732 std::vector
<delayed_method_info
> method_list
;
734 /* To be copied to symtab->call_site_htab. */
735 htab_t call_site_htab
= nullptr;
737 /* Non-NULL if this CU came from a DWO file.
738 There is an invariant here that is important to remember:
739 Except for attributes copied from the top level DIE in the "main"
740 (or "stub") file in preparation for reading the DWO file
741 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
742 Either there isn't a DWO file (in which case this is NULL and the point
743 is moot), or there is and either we're not going to read it (in which
744 case this is NULL) or there is and we are reading it (in which case this
746 struct dwo_unit
*dwo_unit
= nullptr;
748 /* The DW_AT_addr_base attribute if present, zero otherwise
749 (zero is a valid value though).
750 Note this value comes from the Fission stub CU/TU's DIE. */
751 ULONGEST addr_base
= 0;
753 /* The DW_AT_ranges_base attribute if present, zero otherwise
754 (zero is a valid value though).
755 Note this value comes from the Fission stub CU/TU's DIE.
756 Also note that the value is zero in the non-DWO case so this value can
757 be used without needing to know whether DWO files are in use or not.
758 N.B. This does not apply to DW_AT_ranges appearing in
759 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
760 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
761 DW_AT_ranges_base *would* have to be applied, and we'd have to care
762 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
763 ULONGEST ranges_base
= 0;
765 /* Mark used when releasing cached dies. */
766 unsigned int mark
: 1;
768 /* This CU references .debug_loc. See the symtab->locations_valid field.
769 This test is imperfect as there may exist optimized debug code not using
770 any location list and still facing inlining issues if handled as
771 unoptimized code. For a future better test see GCC PR other/32998. */
772 unsigned int has_loclist
: 1;
774 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
775 if all the producer_is_* fields are valid. This information is cached
776 because profiling CU expansion showed excessive time spent in
777 producer_is_gxx_lt_4_6. */
778 unsigned int checked_producer
: 1;
779 unsigned int producer_is_gxx_lt_4_6
: 1;
780 unsigned int producer_is_gcc_lt_4_3
: 1;
781 unsigned int producer_is_icc_lt_14
: 1;
783 /* When set, the file that we're processing is known to have
784 debugging info for C++ namespaces. GCC 3.3.x did not produce
785 this information, but later versions do. */
787 unsigned int processing_has_namespace_info
: 1;
790 /* Persistent data held for a compilation unit, even when not
791 processing it. We put a pointer to this structure in the
792 read_symtab_private field of the psymtab. */
794 struct dwarf2_per_cu_data
796 /* The start offset and length of this compilation unit.
797 NOTE: Unlike comp_unit_head.length, this length includes
799 If the DIE refers to a DWO file, this is always of the original die,
801 sect_offset sect_off
;
804 /* DWARF standard version this data has been read from (such as 4 or 5). */
807 /* Flag indicating this compilation unit will be read in before
808 any of the current compilation units are processed. */
809 unsigned int queued
: 1;
811 /* This flag will be set when reading partial DIEs if we need to load
812 absolutely all DIEs for this compilation unit, instead of just the ones
813 we think are interesting. It gets set if we look for a DIE in the
814 hash table and don't find it. */
815 unsigned int load_all_dies
: 1;
817 /* Non-zero if this CU is from .debug_types.
818 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
820 unsigned int is_debug_types
: 1;
822 /* Non-zero if this CU is from the .dwz file. */
823 unsigned int is_dwz
: 1;
825 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
826 This flag is only valid if is_debug_types is true.
827 We can't read a CU directly from a DWO file: There are required
828 attributes in the stub. */
829 unsigned int reading_dwo_directly
: 1;
831 /* Non-zero if the TU has been read.
832 This is used to assist the "Stay in DWO Optimization" for Fission:
833 When reading a DWO, it's faster to read TUs from the DWO instead of
834 fetching them from random other DWOs (due to comdat folding).
835 If the TU has already been read, the optimization is unnecessary
836 (and unwise - we don't want to change where gdb thinks the TU lives
838 This flag is only valid if is_debug_types is true. */
839 unsigned int tu_read
: 1;
841 /* The section this CU/TU lives in.
842 If the DIE refers to a DWO file, this is always the original die,
844 struct dwarf2_section_info
*section
;
846 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
847 of the CU cache it gets reset to NULL again. This is left as NULL for
848 dummy CUs (a CU header, but nothing else). */
849 struct dwarf2_cu
*cu
;
851 /* The corresponding dwarf2_per_objfile. */
852 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
854 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
855 is active. Otherwise, the 'psymtab' field is active. */
858 /* The partial symbol table associated with this compilation unit,
859 or NULL for unread partial units. */
860 struct partial_symtab
*psymtab
;
862 /* Data needed by the "quick" functions. */
863 struct dwarf2_per_cu_quick_data
*quick
;
866 /* The CUs we import using DW_TAG_imported_unit. This is filled in
867 while reading psymtabs, used to compute the psymtab dependencies,
868 and then cleared. Then it is filled in again while reading full
869 symbols, and only deleted when the objfile is destroyed.
871 This is also used to work around a difference between the way gold
872 generates .gdb_index version <=7 and the way gdb does. Arguably this
873 is a gold bug. For symbols coming from TUs, gold records in the index
874 the CU that includes the TU instead of the TU itself. This breaks
875 dw2_lookup_symbol: It assumes that if the index says symbol X lives
876 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
877 will find X. Alas TUs live in their own symtab, so after expanding CU Y
878 we need to look in TU Z to find X. Fortunately, this is akin to
879 DW_TAG_imported_unit, so we just use the same mechanism: For
880 .gdb_index version <=7 this also records the TUs that the CU referred
881 to. Concurrently with this change gdb was modified to emit version 8
882 indices so we only pay a price for gold generated indices.
883 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
884 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
887 /* Entry in the signatured_types hash table. */
889 struct signatured_type
891 /* The "per_cu" object of this type.
892 This struct is used iff per_cu.is_debug_types.
893 N.B.: This is the first member so that it's easy to convert pointers
895 struct dwarf2_per_cu_data per_cu
;
897 /* The type's signature. */
900 /* Offset in the TU of the type's DIE, as read from the TU header.
901 If this TU is a DWO stub and the definition lives in a DWO file
902 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
903 cu_offset type_offset_in_tu
;
905 /* Offset in the section of the type's DIE.
906 If the definition lives in a DWO file, this is the offset in the
907 .debug_types.dwo section.
908 The value is zero until the actual value is known.
909 Zero is otherwise not a valid section offset. */
910 sect_offset type_offset_in_section
;
912 /* Type units are grouped by their DW_AT_stmt_list entry so that they
913 can share them. This points to the containing symtab. */
914 struct type_unit_group
*type_unit_group
;
917 The first time we encounter this type we fully read it in and install it
918 in the symbol tables. Subsequent times we only need the type. */
921 /* Containing DWO unit.
922 This field is valid iff per_cu.reading_dwo_directly. */
923 struct dwo_unit
*dwo_unit
;
926 typedef struct signatured_type
*sig_type_ptr
;
927 DEF_VEC_P (sig_type_ptr
);
929 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
930 This includes type_unit_group and quick_file_names. */
932 struct stmt_list_hash
934 /* The DWO unit this table is from or NULL if there is none. */
935 struct dwo_unit
*dwo_unit
;
937 /* Offset in .debug_line or .debug_line.dwo. */
938 sect_offset line_sect_off
;
941 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
942 an object of this type. */
944 struct type_unit_group
946 /* dwarf2read.c's main "handle" on a TU symtab.
947 To simplify things we create an artificial CU that "includes" all the
948 type units using this stmt_list so that the rest of the code still has
949 a "per_cu" handle on the symtab.
950 This PER_CU is recognized by having no section. */
951 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
952 struct dwarf2_per_cu_data per_cu
;
954 /* The TUs that share this DW_AT_stmt_list entry.
955 This is added to while parsing type units to build partial symtabs,
956 and is deleted afterwards and not used again. */
957 VEC (sig_type_ptr
) *tus
;
959 /* The compunit symtab.
960 Type units in a group needn't all be defined in the same source file,
961 so we create an essentially anonymous symtab as the compunit symtab. */
962 struct compunit_symtab
*compunit_symtab
;
964 /* The data used to construct the hash key. */
965 struct stmt_list_hash hash
;
967 /* The number of symtabs from the line header.
968 The value here must match line_header.num_file_names. */
969 unsigned int num_symtabs
;
971 /* The symbol tables for this TU (obtained from the files listed in
973 WARNING: The order of entries here must match the order of entries
974 in the line header. After the first TU using this type_unit_group, the
975 line header for the subsequent TUs is recreated from this. This is done
976 because we need to use the same symtabs for each TU using the same
977 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
978 there's no guarantee the line header doesn't have duplicate entries. */
979 struct symtab
**symtabs
;
982 /* These sections are what may appear in a (real or virtual) DWO file. */
986 struct dwarf2_section_info abbrev
;
987 struct dwarf2_section_info line
;
988 struct dwarf2_section_info loc
;
989 struct dwarf2_section_info loclists
;
990 struct dwarf2_section_info macinfo
;
991 struct dwarf2_section_info macro
;
992 struct dwarf2_section_info str
;
993 struct dwarf2_section_info str_offsets
;
994 /* In the case of a virtual DWO file, these two are unused. */
995 struct dwarf2_section_info info
;
996 VEC (dwarf2_section_info_def
) *types
;
999 /* CUs/TUs in DWP/DWO files. */
1003 /* Backlink to the containing struct dwo_file. */
1004 struct dwo_file
*dwo_file
;
1006 /* The "id" that distinguishes this CU/TU.
1007 .debug_info calls this "dwo_id", .debug_types calls this "signature".
1008 Since signatures came first, we stick with it for consistency. */
1011 /* The section this CU/TU lives in, in the DWO file. */
1012 struct dwarf2_section_info
*section
;
1014 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
1015 sect_offset sect_off
;
1016 unsigned int length
;
1018 /* For types, offset in the type's DIE of the type defined by this TU. */
1019 cu_offset type_offset_in_tu
;
1022 /* include/dwarf2.h defines the DWP section codes.
1023 It defines a max value but it doesn't define a min value, which we
1024 use for error checking, so provide one. */
1026 enum dwp_v2_section_ids
1031 /* Data for one DWO file.
1033 This includes virtual DWO files (a virtual DWO file is a DWO file as it
1034 appears in a DWP file). DWP files don't really have DWO files per se -
1035 comdat folding of types "loses" the DWO file they came from, and from
1036 a high level view DWP files appear to contain a mass of random types.
1037 However, to maintain consistency with the non-DWP case we pretend DWP
1038 files contain virtual DWO files, and we assign each TU with one virtual
1039 DWO file (generally based on the line and abbrev section offsets -
1040 a heuristic that seems to work in practice). */
1044 /* The DW_AT_GNU_dwo_name attribute.
1045 For virtual DWO files the name is constructed from the section offsets
1046 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
1047 from related CU+TUs. */
1048 const char *dwo_name
;
1050 /* The DW_AT_comp_dir attribute. */
1051 const char *comp_dir
;
1053 /* The bfd, when the file is open. Otherwise this is NULL.
1054 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
1057 /* The sections that make up this DWO file.
1058 Remember that for virtual DWO files in DWP V2, these are virtual
1059 sections (for lack of a better name). */
1060 struct dwo_sections sections
;
1062 /* The CUs in the file.
1063 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
1064 an extension to handle LLVM's Link Time Optimization output (where
1065 multiple source files may be compiled into a single object/dwo pair). */
1068 /* Table of TUs in the file.
1069 Each element is a struct dwo_unit. */
1073 /* These sections are what may appear in a DWP file. */
1077 /* These are used by both DWP version 1 and 2. */
1078 struct dwarf2_section_info str
;
1079 struct dwarf2_section_info cu_index
;
1080 struct dwarf2_section_info tu_index
;
1082 /* These are only used by DWP version 2 files.
1083 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
1084 sections are referenced by section number, and are not recorded here.
1085 In DWP version 2 there is at most one copy of all these sections, each
1086 section being (effectively) comprised of the concatenation of all of the
1087 individual sections that exist in the version 1 format.
1088 To keep the code simple we treat each of these concatenated pieces as a
1089 section itself (a virtual section?). */
1090 struct dwarf2_section_info abbrev
;
1091 struct dwarf2_section_info info
;
1092 struct dwarf2_section_info line
;
1093 struct dwarf2_section_info loc
;
1094 struct dwarf2_section_info macinfo
;
1095 struct dwarf2_section_info macro
;
1096 struct dwarf2_section_info str_offsets
;
1097 struct dwarf2_section_info types
;
1100 /* These sections are what may appear in a virtual DWO file in DWP version 1.
1101 A virtual DWO file is a DWO file as it appears in a DWP file. */
1103 struct virtual_v1_dwo_sections
1105 struct dwarf2_section_info abbrev
;
1106 struct dwarf2_section_info line
;
1107 struct dwarf2_section_info loc
;
1108 struct dwarf2_section_info macinfo
;
1109 struct dwarf2_section_info macro
;
1110 struct dwarf2_section_info str_offsets
;
1111 /* Each DWP hash table entry records one CU or one TU.
1112 That is recorded here, and copied to dwo_unit.section. */
1113 struct dwarf2_section_info info_or_types
;
1116 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
1117 In version 2, the sections of the DWO files are concatenated together
1118 and stored in one section of that name. Thus each ELF section contains
1119 several "virtual" sections. */
1121 struct virtual_v2_dwo_sections
1123 bfd_size_type abbrev_offset
;
1124 bfd_size_type abbrev_size
;
1126 bfd_size_type line_offset
;
1127 bfd_size_type line_size
;
1129 bfd_size_type loc_offset
;
1130 bfd_size_type loc_size
;
1132 bfd_size_type macinfo_offset
;
1133 bfd_size_type macinfo_size
;
1135 bfd_size_type macro_offset
;
1136 bfd_size_type macro_size
;
1138 bfd_size_type str_offsets_offset
;
1139 bfd_size_type str_offsets_size
;
1141 /* Each DWP hash table entry records one CU or one TU.
1142 That is recorded here, and copied to dwo_unit.section. */
1143 bfd_size_type info_or_types_offset
;
1144 bfd_size_type info_or_types_size
;
1147 /* Contents of DWP hash tables. */
1149 struct dwp_hash_table
1151 uint32_t version
, nr_columns
;
1152 uint32_t nr_units
, nr_slots
;
1153 const gdb_byte
*hash_table
, *unit_table
;
1158 const gdb_byte
*indices
;
1162 /* This is indexed by column number and gives the id of the section
1164 #define MAX_NR_V2_DWO_SECTIONS \
1165 (1 /* .debug_info or .debug_types */ \
1166 + 1 /* .debug_abbrev */ \
1167 + 1 /* .debug_line */ \
1168 + 1 /* .debug_loc */ \
1169 + 1 /* .debug_str_offsets */ \
1170 + 1 /* .debug_macro or .debug_macinfo */)
1171 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
1172 const gdb_byte
*offsets
;
1173 const gdb_byte
*sizes
;
1178 /* Data for one DWP file. */
1182 /* Name of the file. */
1185 /* File format version. */
1191 /* Section info for this file. */
1192 struct dwp_sections sections
;
1194 /* Table of CUs in the file. */
1195 const struct dwp_hash_table
*cus
;
1197 /* Table of TUs in the file. */
1198 const struct dwp_hash_table
*tus
;
1200 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
1204 /* Table to map ELF section numbers to their sections.
1205 This is only needed for the DWP V1 file format. */
1206 unsigned int num_sections
;
1207 asection
**elf_sections
;
1210 /* This represents a '.dwz' file. */
1214 /* A dwz file can only contain a few sections. */
1215 struct dwarf2_section_info abbrev
;
1216 struct dwarf2_section_info info
;
1217 struct dwarf2_section_info str
;
1218 struct dwarf2_section_info line
;
1219 struct dwarf2_section_info macro
;
1220 struct dwarf2_section_info gdb_index
;
1221 struct dwarf2_section_info debug_names
;
1223 /* The dwz's BFD. */
1227 /* Struct used to pass misc. parameters to read_die_and_children, et
1228 al. which are used for both .debug_info and .debug_types dies.
1229 All parameters here are unchanging for the life of the call. This
1230 struct exists to abstract away the constant parameters of die reading. */
1232 struct die_reader_specs
1234 /* The bfd of die_section. */
1237 /* The CU of the DIE we are parsing. */
1238 struct dwarf2_cu
*cu
;
1240 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1241 struct dwo_file
*dwo_file
;
1243 /* The section the die comes from.
1244 This is either .debug_info or .debug_types, or the .dwo variants. */
1245 struct dwarf2_section_info
*die_section
;
1247 /* die_section->buffer. */
1248 const gdb_byte
*buffer
;
1250 /* The end of the buffer. */
1251 const gdb_byte
*buffer_end
;
1253 /* The value of the DW_AT_comp_dir attribute. */
1254 const char *comp_dir
;
1256 /* The abbreviation table to use when reading the DIEs. */
1257 struct abbrev_table
*abbrev_table
;
1260 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1261 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1262 const gdb_byte
*info_ptr
,
1263 struct die_info
*comp_unit_die
,
1267 /* A 1-based directory index. This is a strong typedef to prevent
1268 accidentally using a directory index as a 0-based index into an
1270 enum class dir_index
: unsigned int {};
1272 /* Likewise, a 1-based file name index. */
1273 enum class file_name_index
: unsigned int {};
1277 file_entry () = default;
1279 file_entry (const char *name_
, dir_index d_index_
,
1280 unsigned int mod_time_
, unsigned int length_
)
1283 mod_time (mod_time_
),
1287 /* Return the include directory at D_INDEX stored in LH. Returns
1288 NULL if D_INDEX is out of bounds. */
1289 const char *include_dir (const line_header
*lh
) const;
1291 /* The file name. Note this is an observing pointer. The memory is
1292 owned by debug_line_buffer. */
1293 const char *name
{};
1295 /* The directory index (1-based). */
1296 dir_index d_index
{};
1298 unsigned int mod_time
{};
1300 unsigned int length
{};
1302 /* True if referenced by the Line Number Program. */
1305 /* The associated symbol table, if any. */
1306 struct symtab
*symtab
{};
1309 /* The line number information for a compilation unit (found in the
1310 .debug_line section) begins with a "statement program header",
1311 which contains the following information. */
1318 /* Add an entry to the include directory table. */
1319 void add_include_dir (const char *include_dir
);
1321 /* Add an entry to the file name table. */
1322 void add_file_name (const char *name
, dir_index d_index
,
1323 unsigned int mod_time
, unsigned int length
);
1325 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1326 is out of bounds. */
1327 const char *include_dir_at (dir_index index
) const
1329 /* Convert directory index number (1-based) to vector index
1331 size_t vec_index
= to_underlying (index
) - 1;
1333 if (vec_index
>= include_dirs
.size ())
1335 return include_dirs
[vec_index
];
1338 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1339 is out of bounds. */
1340 file_entry
*file_name_at (file_name_index index
)
1342 /* Convert file name index number (1-based) to vector index
1344 size_t vec_index
= to_underlying (index
) - 1;
1346 if (vec_index
>= file_names
.size ())
1348 return &file_names
[vec_index
];
1351 /* Const version of the above. */
1352 const file_entry
*file_name_at (unsigned int index
) const
1354 if (index
>= file_names
.size ())
1356 return &file_names
[index
];
1359 /* Offset of line number information in .debug_line section. */
1360 sect_offset sect_off
{};
1362 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1363 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1365 unsigned int total_length
{};
1366 unsigned short version
{};
1367 unsigned int header_length
{};
1368 unsigned char minimum_instruction_length
{};
1369 unsigned char maximum_ops_per_instruction
{};
1370 unsigned char default_is_stmt
{};
1372 unsigned char line_range
{};
1373 unsigned char opcode_base
{};
1375 /* standard_opcode_lengths[i] is the number of operands for the
1376 standard opcode whose value is i. This means that
1377 standard_opcode_lengths[0] is unused, and the last meaningful
1378 element is standard_opcode_lengths[opcode_base - 1]. */
1379 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1381 /* The include_directories table. Note these are observing
1382 pointers. The memory is owned by debug_line_buffer. */
1383 std::vector
<const char *> include_dirs
;
1385 /* The file_names table. */
1386 std::vector
<file_entry
> file_names
;
1388 /* The start and end of the statement program following this
1389 header. These point into dwarf2_per_objfile->line_buffer. */
1390 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1393 typedef std::unique_ptr
<line_header
> line_header_up
;
1396 file_entry::include_dir (const line_header
*lh
) const
1398 return lh
->include_dir_at (d_index
);
1401 /* When we construct a partial symbol table entry we only
1402 need this much information. */
1403 struct partial_die_info
1405 /* Offset of this DIE. */
1406 sect_offset sect_off
;
1408 /* DWARF-2 tag for this DIE. */
1409 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1411 /* Assorted flags describing the data found in this DIE. */
1412 unsigned int has_children
: 1;
1413 unsigned int is_external
: 1;
1414 unsigned int is_declaration
: 1;
1415 unsigned int has_type
: 1;
1416 unsigned int has_specification
: 1;
1417 unsigned int has_pc_info
: 1;
1418 unsigned int may_be_inlined
: 1;
1420 /* This DIE has been marked DW_AT_main_subprogram. */
1421 unsigned int main_subprogram
: 1;
1423 /* Flag set if the SCOPE field of this structure has been
1425 unsigned int scope_set
: 1;
1427 /* Flag set if the DIE has a byte_size attribute. */
1428 unsigned int has_byte_size
: 1;
1430 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1431 unsigned int has_const_value
: 1;
1433 /* Flag set if any of the DIE's children are template arguments. */
1434 unsigned int has_template_arguments
: 1;
1436 /* Flag set if fixup_partial_die has been called on this die. */
1437 unsigned int fixup_called
: 1;
1439 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1440 unsigned int is_dwz
: 1;
1442 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1443 unsigned int spec_is_dwz
: 1;
1445 /* The name of this DIE. Normally the value of DW_AT_name, but
1446 sometimes a default name for unnamed DIEs. */
1449 /* The linkage name, if present. */
1450 const char *linkage_name
;
1452 /* The scope to prepend to our children. This is generally
1453 allocated on the comp_unit_obstack, so will disappear
1454 when this compilation unit leaves the cache. */
1457 /* Some data associated with the partial DIE. The tag determines
1458 which field is live. */
1461 /* The location description associated with this DIE, if any. */
1462 struct dwarf_block
*locdesc
;
1463 /* The offset of an import, for DW_TAG_imported_unit. */
1464 sect_offset sect_off
;
1467 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1471 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1472 DW_AT_sibling, if any. */
1473 /* NOTE: This member isn't strictly necessary, read_partial_die could
1474 return DW_AT_sibling values to its caller load_partial_dies. */
1475 const gdb_byte
*sibling
;
1477 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1478 DW_AT_specification (or DW_AT_abstract_origin or
1479 DW_AT_extension). */
1480 sect_offset spec_offset
;
1482 /* Pointers to this DIE's parent, first child, and next sibling,
1484 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1487 /* This data structure holds the information of an abbrev. */
1490 unsigned int number
; /* number identifying abbrev */
1491 enum dwarf_tag tag
; /* dwarf tag */
1492 unsigned short has_children
; /* boolean */
1493 unsigned short num_attrs
; /* number of attributes */
1494 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1495 struct abbrev_info
*next
; /* next in chain */
1500 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1501 ENUM_BITFIELD(dwarf_form
) form
: 16;
1503 /* It is valid only if FORM is DW_FORM_implicit_const. */
1504 LONGEST implicit_const
;
1507 /* Size of abbrev_table.abbrev_hash_table. */
1508 #define ABBREV_HASH_SIZE 121
1510 /* Top level data structure to contain an abbreviation table. */
1514 explicit abbrev_table (sect_offset off
)
1518 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1519 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1522 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1524 /* Allocate space for a struct abbrev_info object in
1526 struct abbrev_info
*alloc_abbrev ();
1528 /* Add an abbreviation to the table. */
1529 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1531 /* Look up an abbrev in the table.
1532 Returns NULL if the abbrev is not found. */
1534 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1537 /* Where the abbrev table came from.
1538 This is used as a sanity check when the table is used. */
1539 const sect_offset sect_off
;
1541 /* Storage for the abbrev table. */
1542 auto_obstack abbrev_obstack
;
1546 /* Hash table of abbrevs.
1547 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1548 It could be statically allocated, but the previous code didn't so we
1550 struct abbrev_info
**m_abbrevs
;
1553 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1555 /* Attributes have a name and a value. */
1558 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1559 ENUM_BITFIELD(dwarf_form
) form
: 15;
1561 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1562 field should be in u.str (existing only for DW_STRING) but it is kept
1563 here for better struct attribute alignment. */
1564 unsigned int string_is_canonical
: 1;
1569 struct dwarf_block
*blk
;
1578 /* This data structure holds a complete die structure. */
1581 /* DWARF-2 tag for this DIE. */
1582 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1584 /* Number of attributes */
1585 unsigned char num_attrs
;
1587 /* True if we're presently building the full type name for the
1588 type derived from this DIE. */
1589 unsigned char building_fullname
: 1;
1591 /* True if this die is in process. PR 16581. */
1592 unsigned char in_process
: 1;
1595 unsigned int abbrev
;
1597 /* Offset in .debug_info or .debug_types section. */
1598 sect_offset sect_off
;
1600 /* The dies in a compilation unit form an n-ary tree. PARENT
1601 points to this die's parent; CHILD points to the first child of
1602 this node; and all the children of a given node are chained
1603 together via their SIBLING fields. */
1604 struct die_info
*child
; /* Its first child, if any. */
1605 struct die_info
*sibling
; /* Its next sibling, if any. */
1606 struct die_info
*parent
; /* Its parent, if any. */
1608 /* An array of attributes, with NUM_ATTRS elements. There may be
1609 zero, but it's not common and zero-sized arrays are not
1610 sufficiently portable C. */
1611 struct attribute attrs
[1];
1614 /* Get at parts of an attribute structure. */
1616 #define DW_STRING(attr) ((attr)->u.str)
1617 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1618 #define DW_UNSND(attr) ((attr)->u.unsnd)
1619 #define DW_BLOCK(attr) ((attr)->u.blk)
1620 #define DW_SND(attr) ((attr)->u.snd)
1621 #define DW_ADDR(attr) ((attr)->u.addr)
1622 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1624 /* Blocks are a bunch of untyped bytes. */
1629 /* Valid only if SIZE is not zero. */
1630 const gdb_byte
*data
;
1633 #ifndef ATTR_ALLOC_CHUNK
1634 #define ATTR_ALLOC_CHUNK 4
1637 /* Allocate fields for structs, unions and enums in this size. */
1638 #ifndef DW_FIELD_ALLOC_CHUNK
1639 #define DW_FIELD_ALLOC_CHUNK 4
1642 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1643 but this would require a corresponding change in unpack_field_as_long
1645 static int bits_per_byte
= 8;
1649 struct nextfield
*next
;
1657 struct nextfnfield
*next
;
1658 struct fn_field fnfield
;
1665 struct nextfnfield
*head
;
1668 struct decl_field_list
1670 struct decl_field field
;
1671 struct decl_field_list
*next
;
1674 /* The routines that read and process dies for a C struct or C++ class
1675 pass lists of data member fields and lists of member function fields
1676 in an instance of a field_info structure, as defined below. */
1679 /* List of data member and baseclasses fields. */
1680 struct nextfield
*fields
, *baseclasses
;
1682 /* Number of fields (including baseclasses). */
1685 /* Number of baseclasses. */
1688 /* Set if the accesibility of one of the fields is not public. */
1689 int non_public_fields
;
1691 /* Member function fieldlist array, contains name of possibly overloaded
1692 member function, number of overloaded member functions and a pointer
1693 to the head of the member function field chain. */
1694 struct fnfieldlist
*fnfieldlists
;
1696 /* Number of entries in the fnfieldlists array. */
1699 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1700 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1701 struct decl_field_list
*typedef_field_list
;
1702 unsigned typedef_field_list_count
;
1704 /* Nested types defined by this class and the number of elements in this
1706 struct decl_field_list
*nested_types_list
;
1707 unsigned nested_types_list_count
;
1710 /* One item on the queue of compilation units to read in full symbols
1712 struct dwarf2_queue_item
1714 struct dwarf2_per_cu_data
*per_cu
;
1715 enum language pretend_language
;
1716 struct dwarf2_queue_item
*next
;
1719 /* The current queue. */
1720 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1722 /* Loaded secondary compilation units are kept in memory until they
1723 have not been referenced for the processing of this many
1724 compilation units. Set this to zero to disable caching. Cache
1725 sizes of up to at least twenty will improve startup time for
1726 typical inter-CU-reference binaries, at an obvious memory cost. */
1727 static int dwarf_max_cache_age
= 5;
1729 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1730 struct cmd_list_element
*c
, const char *value
)
1732 fprintf_filtered (file
, _("The upper bound on the age of cached "
1733 "DWARF compilation units is %s.\n"),
1737 /* local function prototypes */
1739 static const char *get_section_name (const struct dwarf2_section_info
*);
1741 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1743 static void dwarf2_find_base_address (struct die_info
*die
,
1744 struct dwarf2_cu
*cu
);
1746 static struct partial_symtab
*create_partial_symtab
1747 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1749 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1750 const gdb_byte
*info_ptr
,
1751 struct die_info
*type_unit_die
,
1752 int has_children
, void *data
);
1754 static void dwarf2_build_psymtabs_hard
1755 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1757 static void scan_partial_symbols (struct partial_die_info
*,
1758 CORE_ADDR
*, CORE_ADDR
*,
1759 int, struct dwarf2_cu
*);
1761 static void add_partial_symbol (struct partial_die_info
*,
1762 struct dwarf2_cu
*);
1764 static void add_partial_namespace (struct partial_die_info
*pdi
,
1765 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1766 int set_addrmap
, struct dwarf2_cu
*cu
);
1768 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1769 CORE_ADDR
*highpc
, int set_addrmap
,
1770 struct dwarf2_cu
*cu
);
1772 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1773 struct dwarf2_cu
*cu
);
1775 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1776 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1777 int need_pc
, struct dwarf2_cu
*cu
);
1779 static void dwarf2_read_symtab (struct partial_symtab
*,
1782 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1784 static abbrev_table_up abbrev_table_read_table
1785 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1788 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1790 static struct partial_die_info
*load_partial_dies
1791 (const struct die_reader_specs
*, const gdb_byte
*, int);
1793 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1794 struct partial_die_info
*,
1795 struct abbrev_info
*,
1799 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1800 struct dwarf2_cu
*);
1802 static void fixup_partial_die (struct partial_die_info
*,
1803 struct dwarf2_cu
*);
1805 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1806 struct attribute
*, struct attr_abbrev
*,
1809 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1811 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1813 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1815 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1817 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1819 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1822 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1824 static LONGEST read_checked_initial_length_and_offset
1825 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1826 unsigned int *, unsigned int *);
1828 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1829 const struct comp_unit_head
*,
1832 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1834 static sect_offset read_abbrev_offset
1835 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1836 struct dwarf2_section_info
*, sect_offset
);
1838 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1840 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1842 static const char *read_indirect_string
1843 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1844 const struct comp_unit_head
*, unsigned int *);
1846 static const char *read_indirect_line_string
1847 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1848 const struct comp_unit_head
*, unsigned int *);
1850 static const char *read_indirect_string_at_offset
1851 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1852 LONGEST str_offset
);
1854 static const char *read_indirect_string_from_dwz
1855 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1857 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1859 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1863 static const char *read_str_index (const struct die_reader_specs
*reader
,
1864 ULONGEST str_index
);
1866 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1868 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1869 struct dwarf2_cu
*);
1871 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1874 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1875 struct dwarf2_cu
*cu
);
1877 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1878 struct dwarf2_cu
*cu
);
1880 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1882 static struct die_info
*die_specification (struct die_info
*die
,
1883 struct dwarf2_cu
**);
1885 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1886 struct dwarf2_cu
*cu
);
1888 static void dwarf_decode_lines (struct line_header
*, const char *,
1889 struct dwarf2_cu
*, struct partial_symtab
*,
1890 CORE_ADDR
, int decode_mapping
);
1892 static void dwarf2_start_subfile (const char *, const char *);
1894 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1895 const char *, const char *,
1898 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1899 struct dwarf2_cu
*, struct symbol
* = NULL
);
1901 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1902 struct dwarf2_cu
*);
1904 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1907 struct obstack
*obstack
,
1908 struct dwarf2_cu
*cu
, LONGEST
*value
,
1909 const gdb_byte
**bytes
,
1910 struct dwarf2_locexpr_baton
**baton
);
1912 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1914 static int need_gnat_info (struct dwarf2_cu
*);
1916 static struct type
*die_descriptive_type (struct die_info
*,
1917 struct dwarf2_cu
*);
1919 static void set_descriptive_type (struct type
*, struct die_info
*,
1920 struct dwarf2_cu
*);
1922 static struct type
*die_containing_type (struct die_info
*,
1923 struct dwarf2_cu
*);
1925 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1926 struct dwarf2_cu
*);
1928 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1930 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1932 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1934 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1935 const char *suffix
, int physname
,
1936 struct dwarf2_cu
*cu
);
1938 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1940 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1942 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1944 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1946 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1948 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1950 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1951 struct dwarf2_cu
*, struct partial_symtab
*);
1953 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1954 values. Keep the items ordered with increasing constraints compliance. */
1957 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1958 PC_BOUNDS_NOT_PRESENT
,
1960 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1961 were present but they do not form a valid range of PC addresses. */
1964 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1967 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1971 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1972 CORE_ADDR
*, CORE_ADDR
*,
1974 struct partial_symtab
*);
1976 static void get_scope_pc_bounds (struct die_info
*,
1977 CORE_ADDR
*, CORE_ADDR
*,
1978 struct dwarf2_cu
*);
1980 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1981 CORE_ADDR
, struct dwarf2_cu
*);
1983 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1984 struct dwarf2_cu
*);
1986 static void dwarf2_attach_fields_to_type (struct field_info
*,
1987 struct type
*, struct dwarf2_cu
*);
1989 static void dwarf2_add_member_fn (struct field_info
*,
1990 struct die_info
*, struct type
*,
1991 struct dwarf2_cu
*);
1993 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1995 struct dwarf2_cu
*);
1997 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1999 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
2001 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
2003 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
2005 static struct using_direct
**using_directives (enum language
);
2007 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
2009 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
2011 static struct type
*read_module_type (struct die_info
*die
,
2012 struct dwarf2_cu
*cu
);
2014 static const char *namespace_name (struct die_info
*die
,
2015 int *is_anonymous
, struct dwarf2_cu
*);
2017 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
2019 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
2021 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
2022 struct dwarf2_cu
*);
2024 static struct die_info
*read_die_and_siblings_1
2025 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
2028 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
2029 const gdb_byte
*info_ptr
,
2030 const gdb_byte
**new_info_ptr
,
2031 struct die_info
*parent
);
2033 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
2034 struct die_info
**, const gdb_byte
*,
2037 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
2038 struct die_info
**, const gdb_byte
*,
2041 static void process_die (struct die_info
*, struct dwarf2_cu
*);
2043 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
2046 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
2048 static const char *dwarf2_full_name (const char *name
,
2049 struct die_info
*die
,
2050 struct dwarf2_cu
*cu
);
2052 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
2053 struct dwarf2_cu
*cu
);
2055 static struct die_info
*dwarf2_extension (struct die_info
*die
,
2056 struct dwarf2_cu
**);
2058 static const char *dwarf_tag_name (unsigned int);
2060 static const char *dwarf_attr_name (unsigned int);
2062 static const char *dwarf_form_name (unsigned int);
2064 static const char *dwarf_bool_name (unsigned int);
2066 static const char *dwarf_type_encoding_name (unsigned int);
2068 static struct die_info
*sibling_die (struct die_info
*);
2070 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
2072 static void dump_die_for_error (struct die_info
*);
2074 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
2077 /*static*/ void dump_die (struct die_info
*, int max_level
);
2079 static void store_in_ref_table (struct die_info
*,
2080 struct dwarf2_cu
*);
2082 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
2084 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
2086 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
2087 const struct attribute
*,
2088 struct dwarf2_cu
**);
2090 static struct die_info
*follow_die_ref (struct die_info
*,
2091 const struct attribute
*,
2092 struct dwarf2_cu
**);
2094 static struct die_info
*follow_die_sig (struct die_info
*,
2095 const struct attribute
*,
2096 struct dwarf2_cu
**);
2098 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
2099 struct dwarf2_cu
*);
2101 static struct type
*get_DW_AT_signature_type (struct die_info
*,
2102 const struct attribute
*,
2103 struct dwarf2_cu
*);
2105 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
2107 static void read_signatured_type (struct signatured_type
*);
2109 static int attr_to_dynamic_prop (const struct attribute
*attr
,
2110 struct die_info
*die
, struct dwarf2_cu
*cu
,
2111 struct dynamic_prop
*prop
);
2113 /* memory allocation interface */
2115 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
2117 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
2119 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
2121 static int attr_form_is_block (const struct attribute
*);
2123 static int attr_form_is_section_offset (const struct attribute
*);
2125 static int attr_form_is_constant (const struct attribute
*);
2127 static int attr_form_is_ref (const struct attribute
*);
2129 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
2130 struct dwarf2_loclist_baton
*baton
,
2131 const struct attribute
*attr
);
2133 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
2135 struct dwarf2_cu
*cu
,
2138 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
2139 const gdb_byte
*info_ptr
,
2140 struct abbrev_info
*abbrev
);
2142 static hashval_t
partial_die_hash (const void *item
);
2144 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
2146 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
2147 (sect_offset sect_off
, unsigned int offset_in_dwz
,
2148 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2150 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
2151 struct die_info
*comp_unit_die
,
2152 enum language pretend_language
);
2154 static void free_cached_comp_units (void *);
2156 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2158 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
2160 static struct type
*set_die_type (struct die_info
*, struct type
*,
2161 struct dwarf2_cu
*);
2163 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2165 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2167 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
2170 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
2173 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
2176 static void dwarf2_add_dependence (struct dwarf2_cu
*,
2177 struct dwarf2_per_cu_data
*);
2179 static void dwarf2_mark (struct dwarf2_cu
*);
2181 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
2183 static struct type
*get_die_type_at_offset (sect_offset
,
2184 struct dwarf2_per_cu_data
*);
2186 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
2188 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
2189 enum language pretend_language
);
2191 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2193 /* Class, the destructor of which frees all allocated queue entries. This
2194 will only have work to do if an error was thrown while processing the
2195 dwarf. If no error was thrown then the queue entries should have all
2196 been processed, and freed, as we went along. */
2198 class dwarf2_queue_guard
2201 dwarf2_queue_guard () = default;
2203 /* Free any entries remaining on the queue. There should only be
2204 entries left if we hit an error while processing the dwarf. */
2205 ~dwarf2_queue_guard ()
2207 struct dwarf2_queue_item
*item
, *last
;
2209 item
= dwarf2_queue
;
2212 /* Anything still marked queued is likely to be in an
2213 inconsistent state, so discard it. */
2214 if (item
->per_cu
->queued
)
2216 if (item
->per_cu
->cu
!= NULL
)
2217 free_one_cached_comp_unit (item
->per_cu
);
2218 item
->per_cu
->queued
= 0;
2226 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2230 /* The return type of find_file_and_directory. Note, the enclosed
2231 string pointers are only valid while this object is valid. */
2233 struct file_and_directory
2235 /* The filename. This is never NULL. */
2238 /* The compilation directory. NULL if not known. If we needed to
2239 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
2240 points directly to the DW_AT_comp_dir string attribute owned by
2241 the obstack that owns the DIE. */
2242 const char *comp_dir
;
2244 /* If we needed to build a new string for comp_dir, this is what
2245 owns the storage. */
2246 std::string comp_dir_storage
;
2249 static file_and_directory
find_file_and_directory (struct die_info
*die
,
2250 struct dwarf2_cu
*cu
);
2252 static char *file_full_name (int file
, struct line_header
*lh
,
2253 const char *comp_dir
);
2255 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
2256 enum class rcuh_kind
{ COMPILE
, TYPE
};
2258 static const gdb_byte
*read_and_check_comp_unit_head
2259 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
2260 struct comp_unit_head
*header
,
2261 struct dwarf2_section_info
*section
,
2262 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
2263 rcuh_kind section_kind
);
2265 static void init_cutu_and_read_dies
2266 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
2267 int use_existing_cu
, int keep
,
2268 die_reader_func_ftype
*die_reader_func
, void *data
);
2270 static void init_cutu_and_read_dies_simple
2271 (struct dwarf2_per_cu_data
*this_cu
,
2272 die_reader_func_ftype
*die_reader_func
, void *data
);
2274 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
2276 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
2278 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2279 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2280 struct dwp_file
*dwp_file
, const char *comp_dir
,
2281 ULONGEST signature
, int is_debug_types
);
2283 static struct dwp_file
*get_dwp_file
2284 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2286 static struct dwo_unit
*lookup_dwo_comp_unit
2287 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2289 static struct dwo_unit
*lookup_dwo_type_unit
2290 (struct signatured_type
*, const char *, const char *);
2292 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2294 static void free_dwo_file_cleanup (void *);
2296 struct free_dwo_file_cleanup_data
2298 struct dwo_file
*dwo_file
;
2299 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
2302 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2304 static void check_producer (struct dwarf2_cu
*cu
);
2306 static void free_line_header_voidp (void *arg
);
2308 /* Various complaints about symbol reading that don't abort the process. */
2311 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2313 complaint (&symfile_complaints
,
2314 _("statement list doesn't fit in .debug_line section"));
2318 dwarf2_debug_line_missing_file_complaint (void)
2320 complaint (&symfile_complaints
,
2321 _(".debug_line section has line data without a file"));
2325 dwarf2_debug_line_missing_end_sequence_complaint (void)
2327 complaint (&symfile_complaints
,
2328 _(".debug_line section has line "
2329 "program sequence without an end"));
2333 dwarf2_complex_location_expr_complaint (void)
2335 complaint (&symfile_complaints
, _("location expression too complex"));
2339 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2342 complaint (&symfile_complaints
,
2343 _("const value length mismatch for '%s', got %d, expected %d"),
2348 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2350 complaint (&symfile_complaints
,
2351 _("debug info runs off end of %s section"
2353 get_section_name (section
),
2354 get_section_file_name (section
));
2358 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2360 complaint (&symfile_complaints
,
2361 _("macro debug info contains a "
2362 "malformed macro definition:\n`%s'"),
2367 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2369 complaint (&symfile_complaints
,
2370 _("invalid attribute class or form for '%s' in '%s'"),
2374 /* Hash function for line_header_hash. */
2377 line_header_hash (const struct line_header
*ofs
)
2379 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2382 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2385 line_header_hash_voidp (const void *item
)
2387 const struct line_header
*ofs
= (const struct line_header
*) item
;
2389 return line_header_hash (ofs
);
2392 /* Equality function for line_header_hash. */
2395 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2397 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2398 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2400 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2401 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2406 /* Read the given attribute value as an address, taking the attribute's
2407 form into account. */
2410 attr_value_as_address (struct attribute
*attr
)
2414 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2416 /* Aside from a few clearly defined exceptions, attributes that
2417 contain an address must always be in DW_FORM_addr form.
2418 Unfortunately, some compilers happen to be violating this
2419 requirement by encoding addresses using other forms, such
2420 as DW_FORM_data4 for example. For those broken compilers,
2421 we try to do our best, without any guarantee of success,
2422 to interpret the address correctly. It would also be nice
2423 to generate a complaint, but that would require us to maintain
2424 a list of legitimate cases where a non-address form is allowed,
2425 as well as update callers to pass in at least the CU's DWARF
2426 version. This is more overhead than what we're willing to
2427 expand for a pretty rare case. */
2428 addr
= DW_UNSND (attr
);
2431 addr
= DW_ADDR (attr
);
2436 /* The suffix for an index file. */
2437 #define INDEX4_SUFFIX ".gdb-index"
2438 #define INDEX5_SUFFIX ".debug_names"
2439 #define DEBUG_STR_SUFFIX ".debug_str"
2441 /* See declaration. */
2443 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2444 const dwarf2_debug_sections
*names
)
2445 : objfile (objfile_
)
2448 names
= &dwarf2_elf_names
;
2450 bfd
*obfd
= objfile
->obfd
;
2452 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2453 locate_sections (obfd
, sec
, *names
);
2456 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2458 dwarf2_per_objfile::~dwarf2_per_objfile ()
2460 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2461 free_cached_comp_units ();
2463 if (quick_file_names_table
)
2464 htab_delete (quick_file_names_table
);
2466 if (line_header_hash
)
2467 htab_delete (line_header_hash
);
2469 for (int ix
= 0; ix
< n_comp_units
; ++ix
)
2470 VEC_free (dwarf2_per_cu_ptr
, all_comp_units
[ix
]->imported_symtabs
);
2472 for (int ix
= 0; ix
< n_type_units
; ++ix
)
2473 VEC_free (dwarf2_per_cu_ptr
,
2474 all_type_units
[ix
]->per_cu
.imported_symtabs
);
2475 xfree (all_type_units
);
2477 VEC_free (dwarf2_section_info_def
, types
);
2479 if (dwo_files
!= NULL
)
2480 free_dwo_files (dwo_files
, objfile
);
2481 if (dwp_file
!= NULL
)
2482 gdb_bfd_unref (dwp_file
->dbfd
);
2484 if (dwz_file
!= NULL
&& dwz_file
->dwz_bfd
)
2485 gdb_bfd_unref (dwz_file
->dwz_bfd
);
2487 if (index_table
!= NULL
)
2488 index_table
->~mapped_index ();
2490 /* Everything else should be on the objfile obstack. */
2493 /* See declaration. */
2496 dwarf2_per_objfile::free_cached_comp_units ()
2498 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2499 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2500 while (per_cu
!= NULL
)
2502 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2505 *last_chain
= next_cu
;
2510 /* Try to locate the sections we need for DWARF 2 debugging
2511 information and return true if we have enough to do something.
2512 NAMES points to the dwarf2 section names, or is NULL if the standard
2513 ELF names are used. */
2516 dwarf2_has_info (struct objfile
*objfile
,
2517 const struct dwarf2_debug_sections
*names
)
2519 if (objfile
->flags
& OBJF_READNEVER
)
2522 struct dwarf2_per_objfile
*dwarf2_per_objfile
2523 = get_dwarf2_per_objfile (objfile
);
2525 if (dwarf2_per_objfile
== NULL
)
2527 /* Initialize per-objfile state. */
2528 struct dwarf2_per_objfile
*data
2529 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2531 dwarf2_per_objfile
= new (data
) struct dwarf2_per_objfile (objfile
, names
);
2532 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2534 return (!dwarf2_per_objfile
->info
.is_virtual
2535 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2536 && !dwarf2_per_objfile
->abbrev
.is_virtual
2537 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2540 /* Return the containing section of virtual section SECTION. */
2542 static struct dwarf2_section_info
*
2543 get_containing_section (const struct dwarf2_section_info
*section
)
2545 gdb_assert (section
->is_virtual
);
2546 return section
->s
.containing_section
;
2549 /* Return the bfd owner of SECTION. */
2552 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2554 if (section
->is_virtual
)
2556 section
= get_containing_section (section
);
2557 gdb_assert (!section
->is_virtual
);
2559 return section
->s
.section
->owner
;
2562 /* Return the bfd section of SECTION.
2563 Returns NULL if the section is not present. */
2566 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2568 if (section
->is_virtual
)
2570 section
= get_containing_section (section
);
2571 gdb_assert (!section
->is_virtual
);
2573 return section
->s
.section
;
2576 /* Return the name of SECTION. */
2579 get_section_name (const struct dwarf2_section_info
*section
)
2581 asection
*sectp
= get_section_bfd_section (section
);
2583 gdb_assert (sectp
!= NULL
);
2584 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2587 /* Return the name of the file SECTION is in. */
2590 get_section_file_name (const struct dwarf2_section_info
*section
)
2592 bfd
*abfd
= get_section_bfd_owner (section
);
2594 return bfd_get_filename (abfd
);
2597 /* Return the id of SECTION.
2598 Returns 0 if SECTION doesn't exist. */
2601 get_section_id (const struct dwarf2_section_info
*section
)
2603 asection
*sectp
= get_section_bfd_section (section
);
2610 /* Return the flags of SECTION.
2611 SECTION (or containing section if this is a virtual section) must exist. */
2614 get_section_flags (const struct dwarf2_section_info
*section
)
2616 asection
*sectp
= get_section_bfd_section (section
);
2618 gdb_assert (sectp
!= NULL
);
2619 return bfd_get_section_flags (sectp
->owner
, sectp
);
2622 /* When loading sections, we look either for uncompressed section or for
2623 compressed section names. */
2626 section_is_p (const char *section_name
,
2627 const struct dwarf2_section_names
*names
)
2629 if (names
->normal
!= NULL
2630 && strcmp (section_name
, names
->normal
) == 0)
2632 if (names
->compressed
!= NULL
2633 && strcmp (section_name
, names
->compressed
) == 0)
2638 /* See declaration. */
2641 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2642 const dwarf2_debug_sections
&names
)
2644 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2646 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2649 else if (section_is_p (sectp
->name
, &names
.info
))
2651 this->info
.s
.section
= sectp
;
2652 this->info
.size
= bfd_get_section_size (sectp
);
2654 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2656 this->abbrev
.s
.section
= sectp
;
2657 this->abbrev
.size
= bfd_get_section_size (sectp
);
2659 else if (section_is_p (sectp
->name
, &names
.line
))
2661 this->line
.s
.section
= sectp
;
2662 this->line
.size
= bfd_get_section_size (sectp
);
2664 else if (section_is_p (sectp
->name
, &names
.loc
))
2666 this->loc
.s
.section
= sectp
;
2667 this->loc
.size
= bfd_get_section_size (sectp
);
2669 else if (section_is_p (sectp
->name
, &names
.loclists
))
2671 this->loclists
.s
.section
= sectp
;
2672 this->loclists
.size
= bfd_get_section_size (sectp
);
2674 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2676 this->macinfo
.s
.section
= sectp
;
2677 this->macinfo
.size
= bfd_get_section_size (sectp
);
2679 else if (section_is_p (sectp
->name
, &names
.macro
))
2681 this->macro
.s
.section
= sectp
;
2682 this->macro
.size
= bfd_get_section_size (sectp
);
2684 else if (section_is_p (sectp
->name
, &names
.str
))
2686 this->str
.s
.section
= sectp
;
2687 this->str
.size
= bfd_get_section_size (sectp
);
2689 else if (section_is_p (sectp
->name
, &names
.line_str
))
2691 this->line_str
.s
.section
= sectp
;
2692 this->line_str
.size
= bfd_get_section_size (sectp
);
2694 else if (section_is_p (sectp
->name
, &names
.addr
))
2696 this->addr
.s
.section
= sectp
;
2697 this->addr
.size
= bfd_get_section_size (sectp
);
2699 else if (section_is_p (sectp
->name
, &names
.frame
))
2701 this->frame
.s
.section
= sectp
;
2702 this->frame
.size
= bfd_get_section_size (sectp
);
2704 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2706 this->eh_frame
.s
.section
= sectp
;
2707 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2709 else if (section_is_p (sectp
->name
, &names
.ranges
))
2711 this->ranges
.s
.section
= sectp
;
2712 this->ranges
.size
= bfd_get_section_size (sectp
);
2714 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2716 this->rnglists
.s
.section
= sectp
;
2717 this->rnglists
.size
= bfd_get_section_size (sectp
);
2719 else if (section_is_p (sectp
->name
, &names
.types
))
2721 struct dwarf2_section_info type_section
;
2723 memset (&type_section
, 0, sizeof (type_section
));
2724 type_section
.s
.section
= sectp
;
2725 type_section
.size
= bfd_get_section_size (sectp
);
2727 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2730 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2732 this->gdb_index
.s
.section
= sectp
;
2733 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2735 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2737 this->debug_names
.s
.section
= sectp
;
2738 this->debug_names
.size
= bfd_get_section_size (sectp
);
2740 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2742 this->debug_aranges
.s
.section
= sectp
;
2743 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2746 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2747 && bfd_section_vma (abfd
, sectp
) == 0)
2748 this->has_section_at_zero
= true;
2751 /* A helper function that decides whether a section is empty,
2755 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2757 if (section
->is_virtual
)
2758 return section
->size
== 0;
2759 return section
->s
.section
== NULL
|| section
->size
== 0;
2762 /* Read the contents of the section INFO.
2763 OBJFILE is the main object file, but not necessarily the file where
2764 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2766 If the section is compressed, uncompress it before returning. */
2769 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2773 gdb_byte
*buf
, *retbuf
;
2777 info
->buffer
= NULL
;
2780 if (dwarf2_section_empty_p (info
))
2783 sectp
= get_section_bfd_section (info
);
2785 /* If this is a virtual section we need to read in the real one first. */
2786 if (info
->is_virtual
)
2788 struct dwarf2_section_info
*containing_section
=
2789 get_containing_section (info
);
2791 gdb_assert (sectp
!= NULL
);
2792 if ((sectp
->flags
& SEC_RELOC
) != 0)
2794 error (_("Dwarf Error: DWP format V2 with relocations is not"
2795 " supported in section %s [in module %s]"),
2796 get_section_name (info
), get_section_file_name (info
));
2798 dwarf2_read_section (objfile
, containing_section
);
2799 /* Other code should have already caught virtual sections that don't
2801 gdb_assert (info
->virtual_offset
+ info
->size
2802 <= containing_section
->size
);
2803 /* If the real section is empty or there was a problem reading the
2804 section we shouldn't get here. */
2805 gdb_assert (containing_section
->buffer
!= NULL
);
2806 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2810 /* If the section has relocations, we must read it ourselves.
2811 Otherwise we attach it to the BFD. */
2812 if ((sectp
->flags
& SEC_RELOC
) == 0)
2814 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2818 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2821 /* When debugging .o files, we may need to apply relocations; see
2822 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2823 We never compress sections in .o files, so we only need to
2824 try this when the section is not compressed. */
2825 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2828 info
->buffer
= retbuf
;
2832 abfd
= get_section_bfd_owner (info
);
2833 gdb_assert (abfd
!= NULL
);
2835 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2836 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2838 error (_("Dwarf Error: Can't read DWARF data"
2839 " in section %s [in module %s]"),
2840 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2844 /* A helper function that returns the size of a section in a safe way.
2845 If you are positive that the section has been read before using the
2846 size, then it is safe to refer to the dwarf2_section_info object's
2847 "size" field directly. In other cases, you must call this
2848 function, because for compressed sections the size field is not set
2849 correctly until the section has been read. */
2851 static bfd_size_type
2852 dwarf2_section_size (struct objfile
*objfile
,
2853 struct dwarf2_section_info
*info
)
2856 dwarf2_read_section (objfile
, info
);
2860 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2864 dwarf2_get_section_info (struct objfile
*objfile
,
2865 enum dwarf2_section_enum sect
,
2866 asection
**sectp
, const gdb_byte
**bufp
,
2867 bfd_size_type
*sizep
)
2869 struct dwarf2_per_objfile
*data
2870 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2871 dwarf2_objfile_data_key
);
2872 struct dwarf2_section_info
*info
;
2874 /* We may see an objfile without any DWARF, in which case we just
2885 case DWARF2_DEBUG_FRAME
:
2886 info
= &data
->frame
;
2888 case DWARF2_EH_FRAME
:
2889 info
= &data
->eh_frame
;
2892 gdb_assert_not_reached ("unexpected section");
2895 dwarf2_read_section (objfile
, info
);
2897 *sectp
= get_section_bfd_section (info
);
2898 *bufp
= info
->buffer
;
2899 *sizep
= info
->size
;
2902 /* A helper function to find the sections for a .dwz file. */
2905 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2907 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2909 /* Note that we only support the standard ELF names, because .dwz
2910 is ELF-only (at the time of writing). */
2911 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2913 dwz_file
->abbrev
.s
.section
= sectp
;
2914 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2916 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2918 dwz_file
->info
.s
.section
= sectp
;
2919 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2921 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2923 dwz_file
->str
.s
.section
= sectp
;
2924 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2926 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2928 dwz_file
->line
.s
.section
= sectp
;
2929 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2931 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2933 dwz_file
->macro
.s
.section
= sectp
;
2934 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2936 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2938 dwz_file
->gdb_index
.s
.section
= sectp
;
2939 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2941 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2943 dwz_file
->debug_names
.s
.section
= sectp
;
2944 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2948 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2949 there is no .gnu_debugaltlink section in the file. Error if there
2950 is such a section but the file cannot be found. */
2952 static struct dwz_file
*
2953 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2955 const char *filename
;
2956 struct dwz_file
*result
;
2957 bfd_size_type buildid_len_arg
;
2961 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2962 return dwarf2_per_objfile
->dwz_file
;
2964 bfd_set_error (bfd_error_no_error
);
2965 gdb::unique_xmalloc_ptr
<char> data
2966 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2967 &buildid_len_arg
, &buildid
));
2970 if (bfd_get_error () == bfd_error_no_error
)
2972 error (_("could not read '.gnu_debugaltlink' section: %s"),
2973 bfd_errmsg (bfd_get_error ()));
2976 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2978 buildid_len
= (size_t) buildid_len_arg
;
2980 filename
= data
.get ();
2982 std::string abs_storage
;
2983 if (!IS_ABSOLUTE_PATH (filename
))
2985 gdb::unique_xmalloc_ptr
<char> abs
2986 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2988 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2989 filename
= abs_storage
.c_str ();
2992 /* First try the file name given in the section. If that doesn't
2993 work, try to use the build-id instead. */
2994 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2995 if (dwz_bfd
!= NULL
)
2997 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
3001 if (dwz_bfd
== NULL
)
3002 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
3004 if (dwz_bfd
== NULL
)
3005 error (_("could not find '.gnu_debugaltlink' file for %s"),
3006 objfile_name (dwarf2_per_objfile
->objfile
));
3008 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
3010 result
->dwz_bfd
= dwz_bfd
.release ();
3012 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
3014 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
3015 dwarf2_per_objfile
->dwz_file
= result
;
3019 /* DWARF quick_symbols_functions support. */
3021 /* TUs can share .debug_line entries, and there can be a lot more TUs than
3022 unique line tables, so we maintain a separate table of all .debug_line
3023 derived entries to support the sharing.
3024 All the quick functions need is the list of file names. We discard the
3025 line_header when we're done and don't need to record it here. */
3026 struct quick_file_names
3028 /* The data used to construct the hash key. */
3029 struct stmt_list_hash hash
;
3031 /* The number of entries in file_names, real_names. */
3032 unsigned int num_file_names
;
3034 /* The file names from the line table, after being run through
3036 const char **file_names
;
3038 /* The file names from the line table after being run through
3039 gdb_realpath. These are computed lazily. */
3040 const char **real_names
;
3043 /* When using the index (and thus not using psymtabs), each CU has an
3044 object of this type. This is used to hold information needed by
3045 the various "quick" methods. */
3046 struct dwarf2_per_cu_quick_data
3048 /* The file table. This can be NULL if there was no file table
3049 or it's currently not read in.
3050 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
3051 struct quick_file_names
*file_names
;
3053 /* The corresponding symbol table. This is NULL if symbols for this
3054 CU have not yet been read. */
3055 struct compunit_symtab
*compunit_symtab
;
3057 /* A temporary mark bit used when iterating over all CUs in
3058 expand_symtabs_matching. */
3059 unsigned int mark
: 1;
3061 /* True if we've tried to read the file table and found there isn't one.
3062 There will be no point in trying to read it again next time. */
3063 unsigned int no_file_data
: 1;
3066 /* Utility hash function for a stmt_list_hash. */
3069 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
3073 if (stmt_list_hash
->dwo_unit
!= NULL
)
3074 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
3075 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
3079 /* Utility equality function for a stmt_list_hash. */
3082 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
3083 const struct stmt_list_hash
*rhs
)
3085 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
3087 if (lhs
->dwo_unit
!= NULL
3088 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
3091 return lhs
->line_sect_off
== rhs
->line_sect_off
;
3094 /* Hash function for a quick_file_names. */
3097 hash_file_name_entry (const void *e
)
3099 const struct quick_file_names
*file_data
3100 = (const struct quick_file_names
*) e
;
3102 return hash_stmt_list_entry (&file_data
->hash
);
3105 /* Equality function for a quick_file_names. */
3108 eq_file_name_entry (const void *a
, const void *b
)
3110 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
3111 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
3113 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
3116 /* Delete function for a quick_file_names. */
3119 delete_file_name_entry (void *e
)
3121 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
3124 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3126 xfree ((void*) file_data
->file_names
[i
]);
3127 if (file_data
->real_names
)
3128 xfree ((void*) file_data
->real_names
[i
]);
3131 /* The space for the struct itself lives on objfile_obstack,
3132 so we don't free it here. */
3135 /* Create a quick_file_names hash table. */
3138 create_quick_file_names_table (unsigned int nr_initial_entries
)
3140 return htab_create_alloc (nr_initial_entries
,
3141 hash_file_name_entry
, eq_file_name_entry
,
3142 delete_file_name_entry
, xcalloc
, xfree
);
3145 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
3146 have to be created afterwards. You should call age_cached_comp_units after
3147 processing PER_CU->CU. dw2_setup must have been already called. */
3150 load_cu (struct dwarf2_per_cu_data
*per_cu
)
3152 if (per_cu
->is_debug_types
)
3153 load_full_type_unit (per_cu
);
3155 load_full_comp_unit (per_cu
, language_minimal
);
3157 if (per_cu
->cu
== NULL
)
3158 return; /* Dummy CU. */
3160 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
3163 /* Read in the symbols for PER_CU. */
3166 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
3168 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
3170 /* Skip type_unit_groups, reading the type units they contain
3171 is handled elsewhere. */
3172 if (IS_TYPE_UNIT_GROUP (per_cu
))
3175 /* The destructor of dwarf2_queue_guard frees any entries left on
3176 the queue. After this point we're guaranteed to leave this function
3177 with the dwarf queue empty. */
3178 dwarf2_queue_guard q_guard
;
3180 if (dwarf2_per_objfile
->using_index
3181 ? per_cu
->v
.quick
->compunit_symtab
== NULL
3182 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
3184 queue_comp_unit (per_cu
, language_minimal
);
3187 /* If we just loaded a CU from a DWO, and we're working with an index
3188 that may badly handle TUs, load all the TUs in that DWO as well.
3189 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
3190 if (!per_cu
->is_debug_types
3191 && per_cu
->cu
!= NULL
3192 && per_cu
->cu
->dwo_unit
!= NULL
3193 && dwarf2_per_objfile
->index_table
!= NULL
3194 && dwarf2_per_objfile
->index_table
->version
<= 7
3195 /* DWP files aren't supported yet. */
3196 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
3197 queue_and_load_all_dwo_tus (per_cu
);
3200 process_queue (dwarf2_per_objfile
);
3202 /* Age the cache, releasing compilation units that have not
3203 been used recently. */
3204 age_cached_comp_units (dwarf2_per_objfile
);
3207 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
3208 the objfile from which this CU came. Returns the resulting symbol
3211 static struct compunit_symtab
*
3212 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
3214 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
3216 gdb_assert (dwarf2_per_objfile
->using_index
);
3217 if (!per_cu
->v
.quick
->compunit_symtab
)
3219 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
,
3220 dwarf2_per_objfile
);
3221 scoped_restore decrementer
= increment_reading_symtab ();
3222 dw2_do_instantiate_symtab (per_cu
);
3223 process_cu_includes (dwarf2_per_objfile
);
3224 do_cleanups (back_to
);
3227 return per_cu
->v
.quick
->compunit_symtab
;
3230 /* Return the CU/TU given its index.
3232 This is intended for loops like:
3234 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3235 + dwarf2_per_objfile->n_type_units); ++i)
3237 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
3243 static struct dwarf2_per_cu_data
*
3244 dw2_get_cutu (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3247 if (index
>= dwarf2_per_objfile
->n_comp_units
)
3249 index
-= dwarf2_per_objfile
->n_comp_units
;
3250 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
3251 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
3254 return dwarf2_per_objfile
->all_comp_units
[index
];
3257 /* Return the CU given its index.
3258 This differs from dw2_get_cutu in that it's for when you know INDEX
3261 static struct dwarf2_per_cu_data
*
3262 dw2_get_cu (struct dwarf2_per_objfile
*dwarf2_per_objfile
, int index
)
3264 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
3266 return dwarf2_per_objfile
->all_comp_units
[index
];
3269 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
3270 objfile_obstack, and constructed with the specified field
3273 static dwarf2_per_cu_data
*
3274 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3275 struct dwarf2_section_info
*section
,
3277 sect_offset sect_off
, ULONGEST length
)
3279 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3280 dwarf2_per_cu_data
*the_cu
3281 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3282 struct dwarf2_per_cu_data
);
3283 the_cu
->sect_off
= sect_off
;
3284 the_cu
->length
= length
;
3285 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3286 the_cu
->section
= section
;
3287 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3288 struct dwarf2_per_cu_quick_data
);
3289 the_cu
->is_dwz
= is_dwz
;
3293 /* A helper for create_cus_from_index that handles a given list of
3297 create_cus_from_index_list (struct objfile
*objfile
,
3298 const gdb_byte
*cu_list
, offset_type n_elements
,
3299 struct dwarf2_section_info
*section
,
3304 struct dwarf2_per_objfile
*dwarf2_per_objfile
3305 = get_dwarf2_per_objfile (objfile
);
3307 for (i
= 0; i
< n_elements
; i
+= 2)
3309 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3311 sect_offset sect_off
3312 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3313 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3316 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2]
3317 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
3322 /* Read the CU list from the mapped index, and use it to create all
3323 the CU objects for this objfile. */
3326 create_cus_from_index (struct objfile
*objfile
,
3327 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3328 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3330 struct dwz_file
*dwz
;
3331 struct dwarf2_per_objfile
*dwarf2_per_objfile
3332 = get_dwarf2_per_objfile (objfile
);
3334 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3335 dwarf2_per_objfile
->all_comp_units
=
3336 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3337 dwarf2_per_objfile
->n_comp_units
);
3339 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3340 &dwarf2_per_objfile
->info
, 0, 0);
3342 if (dwz_elements
== 0)
3345 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3346 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3347 cu_list_elements
/ 2);
3350 /* Create the signatured type hash table from the index. */
3353 create_signatured_type_table_from_index (struct objfile
*objfile
,
3354 struct dwarf2_section_info
*section
,
3355 const gdb_byte
*bytes
,
3356 offset_type elements
)
3359 htab_t sig_types_hash
;
3360 struct dwarf2_per_objfile
*dwarf2_per_objfile
3361 = get_dwarf2_per_objfile (objfile
);
3363 dwarf2_per_objfile
->n_type_units
3364 = dwarf2_per_objfile
->n_allocated_type_units
3366 dwarf2_per_objfile
->all_type_units
=
3367 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3369 sig_types_hash
= allocate_signatured_type_table (objfile
);
3371 for (i
= 0; i
< elements
; i
+= 3)
3373 struct signatured_type
*sig_type
;
3376 cu_offset type_offset_in_tu
;
3378 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3379 sect_offset sect_off
3380 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3382 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3384 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3387 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3388 struct signatured_type
);
3389 sig_type
->signature
= signature
;
3390 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3391 sig_type
->per_cu
.is_debug_types
= 1;
3392 sig_type
->per_cu
.section
= section
;
3393 sig_type
->per_cu
.sect_off
= sect_off
;
3394 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3395 sig_type
->per_cu
.v
.quick
3396 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3397 struct dwarf2_per_cu_quick_data
);
3399 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3402 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3405 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3408 /* Create the signatured type hash table from .debug_names. */
3411 create_signatured_type_table_from_debug_names
3412 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3413 const mapped_debug_names
&map
,
3414 struct dwarf2_section_info
*section
,
3415 struct dwarf2_section_info
*abbrev_section
)
3417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3419 dwarf2_read_section (objfile
, section
);
3420 dwarf2_read_section (objfile
, abbrev_section
);
3422 dwarf2_per_objfile
->n_type_units
3423 = dwarf2_per_objfile
->n_allocated_type_units
3425 dwarf2_per_objfile
->all_type_units
3426 = XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3428 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3430 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3432 struct signatured_type
*sig_type
;
3435 cu_offset type_offset_in_tu
;
3437 sect_offset sect_off
3438 = (sect_offset
) (extract_unsigned_integer
3439 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3441 map
.dwarf5_byte_order
));
3443 comp_unit_head cu_header
;
3444 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3446 section
->buffer
+ to_underlying (sect_off
),
3449 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3450 struct signatured_type
);
3451 sig_type
->signature
= cu_header
.signature
;
3452 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3453 sig_type
->per_cu
.is_debug_types
= 1;
3454 sig_type
->per_cu
.section
= section
;
3455 sig_type
->per_cu
.sect_off
= sect_off
;
3456 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3457 sig_type
->per_cu
.v
.quick
3458 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3459 struct dwarf2_per_cu_quick_data
);
3461 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3464 dwarf2_per_objfile
->all_type_units
[i
] = sig_type
;
3467 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3470 /* Read the address map data from the mapped index, and use it to
3471 populate the objfile's psymtabs_addrmap. */
3474 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3475 struct mapped_index
*index
)
3477 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3478 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3479 const gdb_byte
*iter
, *end
;
3480 struct addrmap
*mutable_map
;
3483 auto_obstack temp_obstack
;
3485 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3487 iter
= index
->address_table
.data ();
3488 end
= iter
+ index
->address_table
.size ();
3490 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3494 ULONGEST hi
, lo
, cu_index
;
3495 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3497 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3499 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3504 complaint (&symfile_complaints
,
3505 _(".gdb_index address table has invalid range (%s - %s)"),
3506 hex_string (lo
), hex_string (hi
));
3510 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3512 complaint (&symfile_complaints
,
3513 _(".gdb_index address table has invalid CU number %u"),
3514 (unsigned) cu_index
);
3518 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3519 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3520 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3521 dw2_get_cutu (dwarf2_per_objfile
, cu_index
));
3524 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3525 &objfile
->objfile_obstack
);
3528 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3529 populate the objfile's psymtabs_addrmap. */
3532 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3533 struct dwarf2_section_info
*section
)
3535 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3536 bfd
*abfd
= objfile
->obfd
;
3537 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3538 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3539 SECT_OFF_TEXT (objfile
));
3541 auto_obstack temp_obstack
;
3542 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3544 std::unordered_map
<sect_offset
,
3545 dwarf2_per_cu_data
*,
3546 gdb::hash_enum
<sect_offset
>>
3547 debug_info_offset_to_per_cu
;
3548 for (int cui
= 0; cui
< dwarf2_per_objfile
->n_comp_units
; ++cui
)
3550 dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, cui
);
3551 const auto insertpair
3552 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3553 if (!insertpair
.second
)
3555 warning (_("Section .debug_aranges in %s has duplicate "
3556 "debug_info_offset %u, ignoring .debug_aranges."),
3557 objfile_name (objfile
), to_underlying (per_cu
->sect_off
));
3562 dwarf2_read_section (objfile
, section
);
3564 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3566 const gdb_byte
*addr
= section
->buffer
;
3568 while (addr
< section
->buffer
+ section
->size
)
3570 const gdb_byte
*const entry_addr
= addr
;
3571 unsigned int bytes_read
;
3573 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3577 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3578 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3579 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3580 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3582 warning (_("Section .debug_aranges in %s entry at offset %zu "
3583 "length %s exceeds section length %s, "
3584 "ignoring .debug_aranges."),
3585 objfile_name (objfile
), entry_addr
- section
->buffer
,
3586 plongest (bytes_read
+ entry_length
),
3587 pulongest (section
->size
));
3591 /* The version number. */
3592 const uint16_t version
= read_2_bytes (abfd
, addr
);
3596 warning (_("Section .debug_aranges in %s entry at offset %zu "
3597 "has unsupported version %d, ignoring .debug_aranges."),
3598 objfile_name (objfile
), entry_addr
- section
->buffer
,
3603 const uint64_t debug_info_offset
3604 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3605 addr
+= offset_size
;
3606 const auto per_cu_it
3607 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3608 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3610 warning (_("Section .debug_aranges in %s entry at offset %zu "
3611 "debug_info_offset %s does not exists, "
3612 "ignoring .debug_aranges."),
3613 objfile_name (objfile
), entry_addr
- section
->buffer
,
3614 pulongest (debug_info_offset
));
3617 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3619 const uint8_t address_size
= *addr
++;
3620 if (address_size
< 1 || address_size
> 8)
3622 warning (_("Section .debug_aranges in %s entry at offset %zu "
3623 "address_size %u is invalid, ignoring .debug_aranges."),
3624 objfile_name (objfile
), entry_addr
- section
->buffer
,
3629 const uint8_t segment_selector_size
= *addr
++;
3630 if (segment_selector_size
!= 0)
3632 warning (_("Section .debug_aranges in %s entry at offset %zu "
3633 "segment_selector_size %u is not supported, "
3634 "ignoring .debug_aranges."),
3635 objfile_name (objfile
), entry_addr
- section
->buffer
,
3636 segment_selector_size
);
3640 /* Must pad to an alignment boundary that is twice the address
3641 size. It is undocumented by the DWARF standard but GCC does
3643 for (size_t padding
= ((-(addr
- section
->buffer
))
3644 & (2 * address_size
- 1));
3645 padding
> 0; padding
--)
3648 warning (_("Section .debug_aranges in %s entry at offset %zu "
3649 "padding is not zero, ignoring .debug_aranges."),
3650 objfile_name (objfile
), entry_addr
- section
->buffer
);
3656 if (addr
+ 2 * address_size
> entry_end
)
3658 warning (_("Section .debug_aranges in %s entry at offset %zu "
3659 "address list is not properly terminated, "
3660 "ignoring .debug_aranges."),
3661 objfile_name (objfile
), entry_addr
- section
->buffer
);
3664 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3666 addr
+= address_size
;
3667 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3669 addr
+= address_size
;
3670 if (start
== 0 && length
== 0)
3672 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3674 /* Symbol was eliminated due to a COMDAT group. */
3677 ULONGEST end
= start
+ length
;
3678 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3679 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3680 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3684 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3685 &objfile
->objfile_obstack
);
3688 /* The hash function for strings in the mapped index. This is the same as
3689 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3690 implementation. This is necessary because the hash function is tied to the
3691 format of the mapped index file. The hash values do not have to match with
3694 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3697 mapped_index_string_hash (int index_version
, const void *p
)
3699 const unsigned char *str
= (const unsigned char *) p
;
3703 while ((c
= *str
++) != 0)
3705 if (index_version
>= 5)
3707 r
= r
* 67 + c
- 113;
3713 /* Find a slot in the mapped index INDEX for the object named NAME.
3714 If NAME is found, set *VEC_OUT to point to the CU vector in the
3715 constant pool and return true. If NAME cannot be found, return
3719 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3720 offset_type
**vec_out
)
3723 offset_type slot
, step
;
3724 int (*cmp
) (const char *, const char *);
3726 gdb::unique_xmalloc_ptr
<char> without_params
;
3727 if (current_language
->la_language
== language_cplus
3728 || current_language
->la_language
== language_fortran
3729 || current_language
->la_language
== language_d
)
3731 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3734 if (strchr (name
, '(') != NULL
)
3736 without_params
= cp_remove_params (name
);
3738 if (without_params
!= NULL
)
3739 name
= without_params
.get ();
3743 /* Index version 4 did not support case insensitive searches. But the
3744 indices for case insensitive languages are built in lowercase, therefore
3745 simulate our NAME being searched is also lowercased. */
3746 hash
= mapped_index_string_hash ((index
->version
== 4
3747 && case_sensitivity
== case_sensitive_off
3748 ? 5 : index
->version
),
3751 slot
= hash
& (index
->symbol_table
.size () - 1);
3752 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3753 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3759 const auto &bucket
= index
->symbol_table
[slot
];
3760 if (bucket
.name
== 0 && bucket
.vec
== 0)
3763 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3764 if (!cmp (name
, str
))
3766 *vec_out
= (offset_type
*) (index
->constant_pool
3767 + MAYBE_SWAP (bucket
.vec
));
3771 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3775 /* A helper function that reads the .gdb_index from SECTION and fills
3776 in MAP. FILENAME is the name of the file containing the section;
3777 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3778 ok to use deprecated sections.
3780 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3781 out parameters that are filled in with information about the CU and
3782 TU lists in the section.
3784 Returns 1 if all went well, 0 otherwise. */
3787 read_index_from_section (struct objfile
*objfile
,
3788 const char *filename
,
3790 struct dwarf2_section_info
*section
,
3791 struct mapped_index
*map
,
3792 const gdb_byte
**cu_list
,
3793 offset_type
*cu_list_elements
,
3794 const gdb_byte
**types_list
,
3795 offset_type
*types_list_elements
)
3797 const gdb_byte
*addr
;
3798 offset_type version
;
3799 offset_type
*metadata
;
3802 if (dwarf2_section_empty_p (section
))
3805 /* Older elfutils strip versions could keep the section in the main
3806 executable while splitting it for the separate debug info file. */
3807 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3810 dwarf2_read_section (objfile
, section
);
3812 addr
= section
->buffer
;
3813 /* Version check. */
3814 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3815 /* Versions earlier than 3 emitted every copy of a psymbol. This
3816 causes the index to behave very poorly for certain requests. Version 3
3817 contained incomplete addrmap. So, it seems better to just ignore such
3821 static int warning_printed
= 0;
3822 if (!warning_printed
)
3824 warning (_("Skipping obsolete .gdb_index section in %s."),
3826 warning_printed
= 1;
3830 /* Index version 4 uses a different hash function than index version
3833 Versions earlier than 6 did not emit psymbols for inlined
3834 functions. Using these files will cause GDB not to be able to
3835 set breakpoints on inlined functions by name, so we ignore these
3836 indices unless the user has done
3837 "set use-deprecated-index-sections on". */
3838 if (version
< 6 && !deprecated_ok
)
3840 static int warning_printed
= 0;
3841 if (!warning_printed
)
3844 Skipping deprecated .gdb_index section in %s.\n\
3845 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3846 to use the section anyway."),
3848 warning_printed
= 1;
3852 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3853 of the TU (for symbols coming from TUs),
3854 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3855 Plus gold-generated indices can have duplicate entries for global symbols,
3856 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3857 These are just performance bugs, and we can't distinguish gdb-generated
3858 indices from gold-generated ones, so issue no warning here. */
3860 /* Indexes with higher version than the one supported by GDB may be no
3861 longer backward compatible. */
3865 map
->version
= version
;
3866 map
->total_size
= section
->size
;
3868 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3871 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3872 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3876 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3877 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3878 - MAYBE_SWAP (metadata
[i
]))
3882 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3883 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3885 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3888 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3889 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3891 = gdb::array_view
<mapped_index::symbol_table_slot
>
3892 ((mapped_index::symbol_table_slot
*) symbol_table
,
3893 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3896 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3901 /* Read .gdb_index. If everything went ok, initialize the "quick"
3902 elements of all the CUs and return 1. Otherwise, return 0. */
3905 dwarf2_read_index (struct objfile
*objfile
)
3907 struct mapped_index local_map
, *map
;
3908 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3909 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3910 struct dwz_file
*dwz
;
3911 struct dwarf2_per_objfile
*dwarf2_per_objfile
3912 = get_dwarf2_per_objfile (objfile
);
3914 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3915 use_deprecated_index_sections
,
3916 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3917 &cu_list
, &cu_list_elements
,
3918 &types_list
, &types_list_elements
))
3921 /* Don't use the index if it's empty. */
3922 if (local_map
.symbol_table
.empty ())
3925 /* If there is a .dwz file, read it so we can get its CU list as
3927 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3930 struct mapped_index dwz_map
;
3931 const gdb_byte
*dwz_types_ignore
;
3932 offset_type dwz_types_elements_ignore
;
3934 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3936 &dwz
->gdb_index
, &dwz_map
,
3937 &dwz_list
, &dwz_list_elements
,
3939 &dwz_types_elements_ignore
))
3941 warning (_("could not read '.gdb_index' section from %s; skipping"),
3942 bfd_get_filename (dwz
->dwz_bfd
));
3947 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3950 if (types_list_elements
)
3952 struct dwarf2_section_info
*section
;
3954 /* We can only handle a single .debug_types when we have an
3956 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3959 section
= VEC_index (dwarf2_section_info_def
,
3960 dwarf2_per_objfile
->types
, 0);
3962 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3963 types_list_elements
);
3966 create_addrmap_from_index (dwarf2_per_objfile
, &local_map
);
3968 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3969 map
= new (map
) mapped_index ();
3972 dwarf2_per_objfile
->index_table
= map
;
3973 dwarf2_per_objfile
->using_index
= 1;
3974 dwarf2_per_objfile
->quick_file_names_table
=
3975 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3980 /* die_reader_func for dw2_get_file_names. */
3983 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3984 const gdb_byte
*info_ptr
,
3985 struct die_info
*comp_unit_die
,
3989 struct dwarf2_cu
*cu
= reader
->cu
;
3990 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3991 struct dwarf2_per_objfile
*dwarf2_per_objfile
3992 = cu
->per_cu
->dwarf2_per_objfile
;
3993 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3994 struct dwarf2_per_cu_data
*lh_cu
;
3995 struct attribute
*attr
;
3998 struct quick_file_names
*qfn
;
4000 gdb_assert (! this_cu
->is_debug_types
);
4002 /* Our callers never want to match partial units -- instead they
4003 will match the enclosing full CU. */
4004 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
4006 this_cu
->v
.quick
->no_file_data
= 1;
4014 sect_offset line_offset
{};
4016 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4019 struct quick_file_names find_entry
;
4021 line_offset
= (sect_offset
) DW_UNSND (attr
);
4023 /* We may have already read in this line header (TU line header sharing).
4024 If we have we're done. */
4025 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
4026 find_entry
.hash
.line_sect_off
= line_offset
;
4027 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
4028 &find_entry
, INSERT
);
4031 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
4035 lh
= dwarf_decode_line_header (line_offset
, cu
);
4039 lh_cu
->v
.quick
->no_file_data
= 1;
4043 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
4044 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
4045 qfn
->hash
.line_sect_off
= line_offset
;
4046 gdb_assert (slot
!= NULL
);
4049 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
4051 qfn
->num_file_names
= lh
->file_names
.size ();
4053 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
4054 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
4055 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
4056 qfn
->real_names
= NULL
;
4058 lh_cu
->v
.quick
->file_names
= qfn
;
4061 /* A helper for the "quick" functions which attempts to read the line
4062 table for THIS_CU. */
4064 static struct quick_file_names
*
4065 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
4067 /* This should never be called for TUs. */
4068 gdb_assert (! this_cu
->is_debug_types
);
4069 /* Nor type unit groups. */
4070 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
4072 if (this_cu
->v
.quick
->file_names
!= NULL
)
4073 return this_cu
->v
.quick
->file_names
;
4074 /* If we know there is no line data, no point in looking again. */
4075 if (this_cu
->v
.quick
->no_file_data
)
4078 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
4080 if (this_cu
->v
.quick
->no_file_data
)
4082 return this_cu
->v
.quick
->file_names
;
4085 /* A helper for the "quick" functions which computes and caches the
4086 real path for a given file name from the line table. */
4089 dw2_get_real_path (struct objfile
*objfile
,
4090 struct quick_file_names
*qfn
, int index
)
4092 if (qfn
->real_names
== NULL
)
4093 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
4094 qfn
->num_file_names
, const char *);
4096 if (qfn
->real_names
[index
] == NULL
)
4097 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
4099 return qfn
->real_names
[index
];
4102 static struct symtab
*
4103 dw2_find_last_source_symtab (struct objfile
*objfile
)
4105 struct dwarf2_per_objfile
*dwarf2_per_objfile
4106 = get_dwarf2_per_objfile (objfile
);
4107 int index
= dwarf2_per_objfile
->n_comp_units
- 1;
4108 dwarf2_per_cu_data
*dwarf_cu
= dw2_get_cutu (dwarf2_per_objfile
, index
);
4109 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
);
4114 return compunit_primary_filetab (cust
);
4117 /* Traversal function for dw2_forget_cached_source_info. */
4120 dw2_free_cached_file_names (void **slot
, void *info
)
4122 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
4124 if (file_data
->real_names
)
4128 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
4130 xfree ((void*) file_data
->real_names
[i
]);
4131 file_data
->real_names
[i
] = NULL
;
4139 dw2_forget_cached_source_info (struct objfile
*objfile
)
4141 struct dwarf2_per_objfile
*dwarf2_per_objfile
4142 = get_dwarf2_per_objfile (objfile
);
4144 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
4145 dw2_free_cached_file_names
, NULL
);
4148 /* Helper function for dw2_map_symtabs_matching_filename that expands
4149 the symtabs and calls the iterator. */
4152 dw2_map_expand_apply (struct objfile
*objfile
,
4153 struct dwarf2_per_cu_data
*per_cu
,
4154 const char *name
, const char *real_path
,
4155 gdb::function_view
<bool (symtab
*)> callback
)
4157 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
4159 /* Don't visit already-expanded CUs. */
4160 if (per_cu
->v
.quick
->compunit_symtab
)
4163 /* This may expand more than one symtab, and we want to iterate over
4165 dw2_instantiate_symtab (per_cu
);
4167 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
4168 last_made
, callback
);
4171 /* Implementation of the map_symtabs_matching_filename method. */
4174 dw2_map_symtabs_matching_filename
4175 (struct objfile
*objfile
, const char *name
, const char *real_path
,
4176 gdb::function_view
<bool (symtab
*)> callback
)
4179 const char *name_basename
= lbasename (name
);
4180 struct dwarf2_per_objfile
*dwarf2_per_objfile
4181 = get_dwarf2_per_objfile (objfile
);
4183 /* The rule is CUs specify all the files, including those used by
4184 any TU, so there's no need to scan TUs here. */
4186 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4189 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (dwarf2_per_objfile
, i
);
4190 struct quick_file_names
*file_data
;
4192 /* We only need to look at symtabs not already expanded. */
4193 if (per_cu
->v
.quick
->compunit_symtab
)
4196 file_data
= dw2_get_file_names (per_cu
);
4197 if (file_data
== NULL
)
4200 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4202 const char *this_name
= file_data
->file_names
[j
];
4203 const char *this_real_name
;
4205 if (compare_filenames_for_search (this_name
, name
))
4207 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
4213 /* Before we invoke realpath, which can get expensive when many
4214 files are involved, do a quick comparison of the basenames. */
4215 if (! basenames_may_differ
4216 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
4219 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4220 if (compare_filenames_for_search (this_real_name
, name
))
4222 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
4228 if (real_path
!= NULL
)
4230 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
4231 gdb_assert (IS_ABSOLUTE_PATH (name
));
4232 if (this_real_name
!= NULL
4233 && FILENAME_CMP (real_path
, this_real_name
) == 0)
4235 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
4247 /* Struct used to manage iterating over all CUs looking for a symbol. */
4249 struct dw2_symtab_iterator
4251 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
4252 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
4253 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
4254 int want_specific_block
;
4255 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
4256 Unused if !WANT_SPECIFIC_BLOCK. */
4258 /* The kind of symbol we're looking for. */
4260 /* The list of CUs from the index entry of the symbol,
4261 or NULL if not found. */
4263 /* The next element in VEC to look at. */
4265 /* The number of elements in VEC, or zero if there is no match. */
4267 /* Have we seen a global version of the symbol?
4268 If so we can ignore all further global instances.
4269 This is to work around gold/15646, inefficient gold-generated
4274 /* Initialize the index symtab iterator ITER.
4275 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
4276 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
4279 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
4280 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4281 int want_specific_block
,
4286 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
4287 iter
->want_specific_block
= want_specific_block
;
4288 iter
->block_index
= block_index
;
4289 iter
->domain
= domain
;
4291 iter
->global_seen
= 0;
4293 mapped_index
*index
= dwarf2_per_objfile
->index_table
;
4295 /* index is NULL if OBJF_READNOW. */
4296 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
4297 iter
->length
= MAYBE_SWAP (*iter
->vec
);
4305 /* Return the next matching CU or NULL if there are no more. */
4307 static struct dwarf2_per_cu_data
*
4308 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
4310 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
4312 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
4314 offset_type cu_index_and_attrs
=
4315 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
4316 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4317 struct dwarf2_per_cu_data
*per_cu
;
4318 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
4319 /* This value is only valid for index versions >= 7. */
4320 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4321 gdb_index_symbol_kind symbol_kind
=
4322 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4323 /* Only check the symbol attributes if they're present.
4324 Indices prior to version 7 don't record them,
4325 and indices >= 7 may elide them for certain symbols
4326 (gold does this). */
4328 (dwarf2_per_objfile
->index_table
->version
>= 7
4329 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4331 /* Don't crash on bad data. */
4332 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4333 + dwarf2_per_objfile
->n_type_units
))
4335 complaint (&symfile_complaints
,
4336 _(".gdb_index entry has bad CU index"
4338 objfile_name (dwarf2_per_objfile
->objfile
));
4342 per_cu
= dw2_get_cutu (dwarf2_per_objfile
, cu_index
);
4344 /* Skip if already read in. */
4345 if (per_cu
->v
.quick
->compunit_symtab
)
4348 /* Check static vs global. */
4351 if (iter
->want_specific_block
4352 && want_static
!= is_static
)
4354 /* Work around gold/15646. */
4355 if (!is_static
&& iter
->global_seen
)
4358 iter
->global_seen
= 1;
4361 /* Only check the symbol's kind if it has one. */
4364 switch (iter
->domain
)
4367 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4368 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4369 /* Some types are also in VAR_DOMAIN. */
4370 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4374 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4378 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4393 static struct compunit_symtab
*
4394 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4395 const char *name
, domain_enum domain
)
4397 struct compunit_symtab
*stab_best
= NULL
;
4398 struct dwarf2_per_objfile
*dwarf2_per_objfile
4399 = get_dwarf2_per_objfile (objfile
);
4401 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4403 struct dw2_symtab_iterator iter
;
4404 struct dwarf2_per_cu_data
*per_cu
;
4406 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4408 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4410 struct symbol
*sym
, *with_opaque
= NULL
;
4411 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
4412 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4413 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4415 sym
= block_find_symbol (block
, name
, domain
,
4416 block_find_non_opaque_type_preferred
,
4419 /* Some caution must be observed with overloaded functions
4420 and methods, since the index will not contain any overload
4421 information (but NAME might contain it). */
4424 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4426 if (with_opaque
!= NULL
4427 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4430 /* Keep looking through other CUs. */
4437 dw2_print_stats (struct objfile
*objfile
)
4439 struct dwarf2_per_objfile
*dwarf2_per_objfile
4440 = get_dwarf2_per_objfile (objfile
);
4441 int total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
4444 for (int i
= 0; i
< total
; ++i
)
4446 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
4448 if (!per_cu
->v
.quick
->compunit_symtab
)
4451 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4452 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4455 /* This dumps minimal information about the index.
4456 It is called via "mt print objfiles".
4457 One use is to verify .gdb_index has been loaded by the
4458 gdb.dwarf2/gdb-index.exp testcase. */
4461 dw2_dump (struct objfile
*objfile
)
4463 struct dwarf2_per_objfile
*dwarf2_per_objfile
4464 = get_dwarf2_per_objfile (objfile
);
4466 gdb_assert (dwarf2_per_objfile
->using_index
);
4467 printf_filtered (".gdb_index:");
4468 if (dwarf2_per_objfile
->index_table
!= NULL
)
4470 printf_filtered (" version %d\n",
4471 dwarf2_per_objfile
->index_table
->version
);
4474 printf_filtered (" faked for \"readnow\"\n");
4475 printf_filtered ("\n");
4479 dw2_relocate (struct objfile
*objfile
,
4480 const struct section_offsets
*new_offsets
,
4481 const struct section_offsets
*delta
)
4483 /* There's nothing to relocate here. */
4487 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4488 const char *func_name
)
4490 struct dwarf2_per_objfile
*dwarf2_per_objfile
4491 = get_dwarf2_per_objfile (objfile
);
4493 struct dw2_symtab_iterator iter
;
4494 struct dwarf2_per_cu_data
*per_cu
;
4496 /* Note: It doesn't matter what we pass for block_index here. */
4497 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4500 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4501 dw2_instantiate_symtab (per_cu
);
4506 dw2_expand_all_symtabs (struct objfile
*objfile
)
4508 struct dwarf2_per_objfile
*dwarf2_per_objfile
4509 = get_dwarf2_per_objfile (objfile
);
4510 int total_units
= (dwarf2_per_objfile
->n_comp_units
4511 + dwarf2_per_objfile
->n_type_units
);
4513 for (int i
= 0; i
< total_units
; ++i
)
4515 struct dwarf2_per_cu_data
*per_cu
4516 = dw2_get_cutu (dwarf2_per_objfile
, i
);
4518 dw2_instantiate_symtab (per_cu
);
4523 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4524 const char *fullname
)
4526 struct dwarf2_per_objfile
*dwarf2_per_objfile
4527 = get_dwarf2_per_objfile (objfile
);
4529 /* We don't need to consider type units here.
4530 This is only called for examining code, e.g. expand_line_sal.
4531 There can be an order of magnitude (or more) more type units
4532 than comp units, and we avoid them if we can. */
4534 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4537 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
4538 struct quick_file_names
*file_data
;
4540 /* We only need to look at symtabs not already expanded. */
4541 if (per_cu
->v
.quick
->compunit_symtab
)
4544 file_data
= dw2_get_file_names (per_cu
);
4545 if (file_data
== NULL
)
4548 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4550 const char *this_fullname
= file_data
->file_names
[j
];
4552 if (filename_cmp (this_fullname
, fullname
) == 0)
4554 dw2_instantiate_symtab (per_cu
);
4562 dw2_map_matching_symbols (struct objfile
*objfile
,
4563 const char * name
, domain_enum domain
,
4565 int (*callback
) (struct block
*,
4566 struct symbol
*, void *),
4567 void *data
, symbol_name_match_type match
,
4568 symbol_compare_ftype
*ordered_compare
)
4570 /* Currently unimplemented; used for Ada. The function can be called if the
4571 current language is Ada for a non-Ada objfile using GNU index. As Ada
4572 does not look for non-Ada symbols this function should just return. */
4575 /* Symbol name matcher for .gdb_index names.
4577 Symbol names in .gdb_index have a few particularities:
4579 - There's no indication of which is the language of each symbol.
4581 Since each language has its own symbol name matching algorithm,
4582 and we don't know which language is the right one, we must match
4583 each symbol against all languages. This would be a potential
4584 performance problem if it were not mitigated by the
4585 mapped_index::name_components lookup table, which significantly
4586 reduces the number of times we need to call into this matcher,
4587 making it a non-issue.
4589 - Symbol names in the index have no overload (parameter)
4590 information. I.e., in C++, "foo(int)" and "foo(long)" both
4591 appear as "foo" in the index, for example.
4593 This means that the lookup names passed to the symbol name
4594 matcher functions must have no parameter information either
4595 because (e.g.) symbol search name "foo" does not match
4596 lookup-name "foo(int)" [while swapping search name for lookup
4599 class gdb_index_symbol_name_matcher
4602 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4603 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4605 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4606 Returns true if any matcher matches. */
4607 bool matches (const char *symbol_name
);
4610 /* A reference to the lookup name we're matching against. */
4611 const lookup_name_info
&m_lookup_name
;
4613 /* A vector holding all the different symbol name matchers, for all
4615 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4618 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4619 (const lookup_name_info
&lookup_name
)
4620 : m_lookup_name (lookup_name
)
4622 /* Prepare the vector of comparison functions upfront, to avoid
4623 doing the same work for each symbol. Care is taken to avoid
4624 matching with the same matcher more than once if/when multiple
4625 languages use the same matcher function. */
4626 auto &matchers
= m_symbol_name_matcher_funcs
;
4627 matchers
.reserve (nr_languages
);
4629 matchers
.push_back (default_symbol_name_matcher
);
4631 for (int i
= 0; i
< nr_languages
; i
++)
4633 const language_defn
*lang
= language_def ((enum language
) i
);
4634 symbol_name_matcher_ftype
*name_matcher
4635 = get_symbol_name_matcher (lang
, m_lookup_name
);
4637 /* Don't insert the same comparison routine more than once.
4638 Note that we do this linear walk instead of a seemingly
4639 cheaper sorted insert, or use a std::set or something like
4640 that, because relative order of function addresses is not
4641 stable. This is not a problem in practice because the number
4642 of supported languages is low, and the cost here is tiny
4643 compared to the number of searches we'll do afterwards using
4645 if (name_matcher
!= default_symbol_name_matcher
4646 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4647 == matchers
.end ()))
4648 matchers
.push_back (name_matcher
);
4653 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4655 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4656 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4662 /* Starting from a search name, return the string that finds the upper
4663 bound of all strings that start with SEARCH_NAME in a sorted name
4664 list. Returns the empty string to indicate that the upper bound is
4665 the end of the list. */
4668 make_sort_after_prefix_name (const char *search_name
)
4670 /* When looking to complete "func", we find the upper bound of all
4671 symbols that start with "func" by looking for where we'd insert
4672 the closest string that would follow "func" in lexicographical
4673 order. Usually, that's "func"-with-last-character-incremented,
4674 i.e. "fund". Mind non-ASCII characters, though. Usually those
4675 will be UTF-8 multi-byte sequences, but we can't be certain.
4676 Especially mind the 0xff character, which is a valid character in
4677 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4678 rule out compilers allowing it in identifiers. Note that
4679 conveniently, strcmp/strcasecmp are specified to compare
4680 characters interpreted as unsigned char. So what we do is treat
4681 the whole string as a base 256 number composed of a sequence of
4682 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4683 to 0, and carries 1 to the following more-significant position.
4684 If the very first character in SEARCH_NAME ends up incremented
4685 and carries/overflows, then the upper bound is the end of the
4686 list. The string after the empty string is also the empty
4689 Some examples of this operation:
4691 SEARCH_NAME => "+1" RESULT
4695 "\xff" "a" "\xff" => "\xff" "b"
4700 Then, with these symbols for example:
4706 completing "func" looks for symbols between "func" and
4707 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4708 which finds "func" and "func1", but not "fund".
4712 funcÿ (Latin1 'ÿ' [0xff])
4716 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4717 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4721 ÿÿ (Latin1 'ÿ' [0xff])
4724 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4725 the end of the list.
4727 std::string after
= search_name
;
4728 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4730 if (!after
.empty ())
4731 after
.back () = (unsigned char) after
.back () + 1;
4735 /* See declaration. */
4737 std::pair
<std::vector
<name_component
>::const_iterator
,
4738 std::vector
<name_component
>::const_iterator
>
4739 mapped_index_base::find_name_components_bounds
4740 (const lookup_name_info
&lookup_name_without_params
) const
4743 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4746 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4748 /* Comparison function object for lower_bound that matches against a
4749 given symbol name. */
4750 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4753 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4754 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4755 return name_cmp (elem_name
, name
) < 0;
4758 /* Comparison function object for upper_bound that matches against a
4759 given symbol name. */
4760 auto lookup_compare_upper
= [&] (const char *name
,
4761 const name_component
&elem
)
4763 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4764 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4765 return name_cmp (name
, elem_name
) < 0;
4768 auto begin
= this->name_components
.begin ();
4769 auto end
= this->name_components
.end ();
4771 /* Find the lower bound. */
4774 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4777 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4780 /* Find the upper bound. */
4783 if (lookup_name_without_params
.completion_mode ())
4785 /* In completion mode, we want UPPER to point past all
4786 symbols names that have the same prefix. I.e., with
4787 these symbols, and completing "func":
4789 function << lower bound
4791 other_function << upper bound
4793 We find the upper bound by looking for the insertion
4794 point of "func"-with-last-character-incremented,
4796 std::string after
= make_sort_after_prefix_name (cplus
);
4799 return std::lower_bound (lower
, end
, after
.c_str (),
4800 lookup_compare_lower
);
4803 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4806 return {lower
, upper
};
4809 /* See declaration. */
4812 mapped_index_base::build_name_components ()
4814 if (!this->name_components
.empty ())
4817 this->name_components_casing
= case_sensitivity
;
4819 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4821 /* The code below only knows how to break apart components of C++
4822 symbol names (and other languages that use '::' as
4823 namespace/module separator). If we add support for wild matching
4824 to some language that uses some other operator (E.g., Ada, Go and
4825 D use '.'), then we'll need to try splitting the symbol name
4826 according to that language too. Note that Ada does support wild
4827 matching, but doesn't currently support .gdb_index. */
4828 auto count
= this->symbol_name_count ();
4829 for (offset_type idx
= 0; idx
< count
; idx
++)
4831 if (this->symbol_name_slot_invalid (idx
))
4834 const char *name
= this->symbol_name_at (idx
);
4836 /* Add each name component to the name component table. */
4837 unsigned int previous_len
= 0;
4838 for (unsigned int current_len
= cp_find_first_component (name
);
4839 name
[current_len
] != '\0';
4840 current_len
+= cp_find_first_component (name
+ current_len
))
4842 gdb_assert (name
[current_len
] == ':');
4843 this->name_components
.push_back ({previous_len
, idx
});
4844 /* Skip the '::'. */
4846 previous_len
= current_len
;
4848 this->name_components
.push_back ({previous_len
, idx
});
4851 /* Sort name_components elements by name. */
4852 auto name_comp_compare
= [&] (const name_component
&left
,
4853 const name_component
&right
)
4855 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4856 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4858 const char *left_name
= left_qualified
+ left
.name_offset
;
4859 const char *right_name
= right_qualified
+ right
.name_offset
;
4861 return name_cmp (left_name
, right_name
) < 0;
4864 std::sort (this->name_components
.begin (),
4865 this->name_components
.end (),
4869 /* Helper for dw2_expand_symtabs_matching that works with a
4870 mapped_index_base instead of the containing objfile. This is split
4871 to a separate function in order to be able to unit test the
4872 name_components matching using a mock mapped_index_base. For each
4873 symbol name that matches, calls MATCH_CALLBACK, passing it the
4874 symbol's index in the mapped_index_base symbol table. */
4877 dw2_expand_symtabs_matching_symbol
4878 (mapped_index_base
&index
,
4879 const lookup_name_info
&lookup_name_in
,
4880 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4881 enum search_domain kind
,
4882 gdb::function_view
<void (offset_type
)> match_callback
)
4884 lookup_name_info lookup_name_without_params
4885 = lookup_name_in
.make_ignore_params ();
4886 gdb_index_symbol_name_matcher lookup_name_matcher
4887 (lookup_name_without_params
);
4889 /* Build the symbol name component sorted vector, if we haven't
4891 index
.build_name_components ();
4893 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4895 /* Now for each symbol name in range, check to see if we have a name
4896 match, and if so, call the MATCH_CALLBACK callback. */
4898 /* The same symbol may appear more than once in the range though.
4899 E.g., if we're looking for symbols that complete "w", and we have
4900 a symbol named "w1::w2", we'll find the two name components for
4901 that same symbol in the range. To be sure we only call the
4902 callback once per symbol, we first collect the symbol name
4903 indexes that matched in a temporary vector and ignore
4905 std::vector
<offset_type
> matches
;
4906 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4908 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4910 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4912 if (!lookup_name_matcher
.matches (qualified
)
4913 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4916 matches
.push_back (bounds
.first
->idx
);
4919 std::sort (matches
.begin (), matches
.end ());
4921 /* Finally call the callback, once per match. */
4923 for (offset_type idx
: matches
)
4927 match_callback (idx
);
4932 /* Above we use a type wider than idx's for 'prev', since 0 and
4933 (offset_type)-1 are both possible values. */
4934 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4939 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4941 /* A mock .gdb_index/.debug_names-like name index table, enough to
4942 exercise dw2_expand_symtabs_matching_symbol, which works with the
4943 mapped_index_base interface. Builds an index from the symbol list
4944 passed as parameter to the constructor. */
4945 class mock_mapped_index
: public mapped_index_base
4948 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4949 : m_symbol_table (symbols
)
4952 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4954 /* Return the number of names in the symbol table. */
4955 virtual size_t symbol_name_count () const
4957 return m_symbol_table
.size ();
4960 /* Get the name of the symbol at IDX in the symbol table. */
4961 virtual const char *symbol_name_at (offset_type idx
) const
4963 return m_symbol_table
[idx
];
4967 gdb::array_view
<const char *> m_symbol_table
;
4970 /* Convenience function that converts a NULL pointer to a "<null>"
4971 string, to pass to print routines. */
4974 string_or_null (const char *str
)
4976 return str
!= NULL
? str
: "<null>";
4979 /* Check if a lookup_name_info built from
4980 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4981 index. EXPECTED_LIST is the list of expected matches, in expected
4982 matching order. If no match expected, then an empty list is
4983 specified. Returns true on success. On failure prints a warning
4984 indicating the file:line that failed, and returns false. */
4987 check_match (const char *file
, int line
,
4988 mock_mapped_index
&mock_index
,
4989 const char *name
, symbol_name_match_type match_type
,
4990 bool completion_mode
,
4991 std::initializer_list
<const char *> expected_list
)
4993 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4995 bool matched
= true;
4997 auto mismatch
= [&] (const char *expected_str
,
5000 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
5001 "expected=\"%s\", got=\"%s\"\n"),
5003 (match_type
== symbol_name_match_type::FULL
5005 name
, string_or_null (expected_str
), string_or_null (got
));
5009 auto expected_it
= expected_list
.begin ();
5010 auto expected_end
= expected_list
.end ();
5012 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
5014 [&] (offset_type idx
)
5016 const char *matched_name
= mock_index
.symbol_name_at (idx
);
5017 const char *expected_str
5018 = expected_it
== expected_end
? NULL
: *expected_it
++;
5020 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
5021 mismatch (expected_str
, matched_name
);
5024 const char *expected_str
5025 = expected_it
== expected_end
? NULL
: *expected_it
++;
5026 if (expected_str
!= NULL
)
5027 mismatch (expected_str
, NULL
);
5032 /* The symbols added to the mock mapped_index for testing (in
5034 static const char *test_symbols
[] = {
5043 "ns2::tmpl<int>::foo2",
5044 "(anonymous namespace)::A::B::C",
5046 /* These are used to check that the increment-last-char in the
5047 matching algorithm for completion doesn't match "t1_fund" when
5048 completing "t1_func". */
5054 /* A UTF-8 name with multi-byte sequences to make sure that
5055 cp-name-parser understands this as a single identifier ("função"
5056 is "function" in PT). */
5059 /* \377 (0xff) is Latin1 'ÿ'. */
5062 /* \377 (0xff) is Latin1 'ÿ'. */
5066 /* A name with all sorts of complications. Starts with "z" to make
5067 it easier for the completion tests below. */
5068 #define Z_SYM_NAME \
5069 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
5070 "::tuple<(anonymous namespace)::ui*, " \
5071 "std::default_delete<(anonymous namespace)::ui>, void>"
5076 /* Returns true if the mapped_index_base::find_name_component_bounds
5077 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
5078 in completion mode. */
5081 check_find_bounds_finds (mapped_index_base
&index
,
5082 const char *search_name
,
5083 gdb::array_view
<const char *> expected_syms
)
5085 lookup_name_info
lookup_name (search_name
,
5086 symbol_name_match_type::FULL
, true);
5088 auto bounds
= index
.find_name_components_bounds (lookup_name
);
5090 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
5091 if (distance
!= expected_syms
.size ())
5094 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
5096 auto nc_elem
= bounds
.first
+ exp_elem
;
5097 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
5098 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
5105 /* Test the lower-level mapped_index::find_name_component_bounds
5109 test_mapped_index_find_name_component_bounds ()
5111 mock_mapped_index
mock_index (test_symbols
);
5113 mock_index
.build_name_components ();
5115 /* Test the lower-level mapped_index::find_name_component_bounds
5116 method in completion mode. */
5118 static const char *expected_syms
[] = {
5123 SELF_CHECK (check_find_bounds_finds (mock_index
,
5124 "t1_func", expected_syms
));
5127 /* Check that the increment-last-char in the name matching algorithm
5128 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
5130 static const char *expected_syms1
[] = {
5134 SELF_CHECK (check_find_bounds_finds (mock_index
,
5135 "\377", expected_syms1
));
5137 static const char *expected_syms2
[] = {
5140 SELF_CHECK (check_find_bounds_finds (mock_index
,
5141 "\377\377", expected_syms2
));
5145 /* Test dw2_expand_symtabs_matching_symbol. */
5148 test_dw2_expand_symtabs_matching_symbol ()
5150 mock_mapped_index
mock_index (test_symbols
);
5152 /* We let all tests run until the end even if some fails, for debug
5154 bool any_mismatch
= false;
5156 /* Create the expected symbols list (an initializer_list). Needed
5157 because lists have commas, and we need to pass them to CHECK,
5158 which is a macro. */
5159 #define EXPECT(...) { __VA_ARGS__ }
5161 /* Wrapper for check_match that passes down the current
5162 __FILE__/__LINE__. */
5163 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
5164 any_mismatch |= !check_match (__FILE__, __LINE__, \
5166 NAME, MATCH_TYPE, COMPLETION_MODE, \
5169 /* Identity checks. */
5170 for (const char *sym
: test_symbols
)
5172 /* Should be able to match all existing symbols. */
5173 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
5176 /* Should be able to match all existing symbols with
5178 std::string with_params
= std::string (sym
) + "(int)";
5179 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
5182 /* Should be able to match all existing symbols with
5183 parameters and qualifiers. */
5184 with_params
= std::string (sym
) + " ( int ) const";
5185 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
5188 /* This should really find sym, but cp-name-parser.y doesn't
5189 know about lvalue/rvalue qualifiers yet. */
5190 with_params
= std::string (sym
) + " ( int ) &&";
5191 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
5195 /* Check that the name matching algorithm for completion doesn't get
5196 confused with Latin1 'ÿ' / 0xff. */
5198 static const char str
[] = "\377";
5199 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
5200 EXPECT ("\377", "\377\377123"));
5203 /* Check that the increment-last-char in the matching algorithm for
5204 completion doesn't match "t1_fund" when completing "t1_func". */
5206 static const char str
[] = "t1_func";
5207 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
5208 EXPECT ("t1_func", "t1_func1"));
5211 /* Check that completion mode works at each prefix of the expected
5214 static const char str
[] = "function(int)";
5215 size_t len
= strlen (str
);
5218 for (size_t i
= 1; i
< len
; i
++)
5220 lookup
.assign (str
, i
);
5221 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
5222 EXPECT ("function"));
5226 /* While "w" is a prefix of both components, the match function
5227 should still only be called once. */
5229 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
5231 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
5235 /* Same, with a "complicated" symbol. */
5237 static const char str
[] = Z_SYM_NAME
;
5238 size_t len
= strlen (str
);
5241 for (size_t i
= 1; i
< len
; i
++)
5243 lookup
.assign (str
, i
);
5244 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
5245 EXPECT (Z_SYM_NAME
));
5249 /* In FULL mode, an incomplete symbol doesn't match. */
5251 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
5255 /* A complete symbol with parameters matches any overload, since the
5256 index has no overload info. */
5258 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
5259 EXPECT ("std::zfunction", "std::zfunction2"));
5260 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
5261 EXPECT ("std::zfunction", "std::zfunction2"));
5262 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
5263 EXPECT ("std::zfunction", "std::zfunction2"));
5266 /* Check that whitespace is ignored appropriately. A symbol with a
5267 template argument list. */
5269 static const char expected
[] = "ns::foo<int>";
5270 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
5272 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
5276 /* Check that whitespace is ignored appropriately. A symbol with a
5277 template argument list that includes a pointer. */
5279 static const char expected
[] = "ns::foo<char*>";
5280 /* Try both completion and non-completion modes. */
5281 static const bool completion_mode
[2] = {false, true};
5282 for (size_t i
= 0; i
< 2; i
++)
5284 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
5285 completion_mode
[i
], EXPECT (expected
));
5286 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
5287 completion_mode
[i
], EXPECT (expected
));
5289 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
5290 completion_mode
[i
], EXPECT (expected
));
5291 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
5292 completion_mode
[i
], EXPECT (expected
));
5297 /* Check method qualifiers are ignored. */
5298 static const char expected
[] = "ns::foo<char*>";
5299 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
5300 symbol_name_match_type::FULL
, true, EXPECT (expected
));
5301 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
5302 symbol_name_match_type::FULL
, true, EXPECT (expected
));
5303 CHECK_MATCH ("foo < char * > ( int ) const",
5304 symbol_name_match_type::WILD
, true, EXPECT (expected
));
5305 CHECK_MATCH ("foo < char * > ( int ) &&",
5306 symbol_name_match_type::WILD
, true, EXPECT (expected
));
5309 /* Test lookup names that don't match anything. */
5311 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
5314 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
5318 /* Some wild matching tests, exercising "(anonymous namespace)",
5319 which should not be confused with a parameter list. */
5321 static const char *syms
[] = {
5325 "A :: B :: C ( int )",
5330 for (const char *s
: syms
)
5332 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
5333 EXPECT ("(anonymous namespace)::A::B::C"));
5338 static const char expected
[] = "ns2::tmpl<int>::foo2";
5339 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
5341 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
5345 SELF_CHECK (!any_mismatch
);
5354 test_mapped_index_find_name_component_bounds ();
5355 test_dw2_expand_symtabs_matching_symbol ();
5358 }} // namespace selftests::dw2_expand_symtabs_matching
5360 #endif /* GDB_SELF_TEST */
5362 /* If FILE_MATCHER is NULL or if PER_CU has
5363 dwarf2_per_cu_quick_data::MARK set (see
5364 dw_expand_symtabs_matching_file_matcher), expand the CU and call
5365 EXPANSION_NOTIFY on it. */
5368 dw2_expand_symtabs_matching_one
5369 (struct dwarf2_per_cu_data
*per_cu
,
5370 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5371 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
5373 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5375 bool symtab_was_null
5376 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5378 dw2_instantiate_symtab (per_cu
);
5380 if (expansion_notify
!= NULL
5382 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5383 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5387 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5388 matched, to expand corresponding CUs that were marked. IDX is the
5389 index of the symbol name that matched. */
5392 dw2_expand_marked_cus
5393 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5394 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5395 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5398 offset_type
*vec
, vec_len
, vec_idx
;
5399 bool global_seen
= false;
5400 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5402 vec
= (offset_type
*) (index
.constant_pool
5403 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5404 vec_len
= MAYBE_SWAP (vec
[0]);
5405 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5407 struct dwarf2_per_cu_data
*per_cu
;
5408 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5409 /* This value is only valid for index versions >= 7. */
5410 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5411 gdb_index_symbol_kind symbol_kind
=
5412 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5413 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5414 /* Only check the symbol attributes if they're present.
5415 Indices prior to version 7 don't record them,
5416 and indices >= 7 may elide them for certain symbols
5417 (gold does this). */
5420 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5422 /* Work around gold/15646. */
5425 if (!is_static
&& global_seen
)
5431 /* Only check the symbol's kind if it has one. */
5436 case VARIABLES_DOMAIN
:
5437 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5440 case FUNCTIONS_DOMAIN
:
5441 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5445 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5453 /* Don't crash on bad data. */
5454 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
5455 + dwarf2_per_objfile
->n_type_units
))
5457 complaint (&symfile_complaints
,
5458 _(".gdb_index entry has bad CU index"
5460 objfile_name (dwarf2_per_objfile
->objfile
));
5464 per_cu
= dw2_get_cutu (dwarf2_per_objfile
, cu_index
);
5465 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5470 /* If FILE_MATCHER is non-NULL, set all the
5471 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5472 that match FILE_MATCHER. */
5475 dw_expand_symtabs_matching_file_matcher
5476 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5477 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5479 if (file_matcher
== NULL
)
5482 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5484 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5486 NULL
, xcalloc
, xfree
));
5487 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5489 NULL
, xcalloc
, xfree
));
5491 /* The rule is CUs specify all the files, including those used by
5492 any TU, so there's no need to scan TUs here. */
5494 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5497 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (dwarf2_per_objfile
, i
);
5498 struct quick_file_names
*file_data
;
5503 per_cu
->v
.quick
->mark
= 0;
5505 /* We only need to look at symtabs not already expanded. */
5506 if (per_cu
->v
.quick
->compunit_symtab
)
5509 file_data
= dw2_get_file_names (per_cu
);
5510 if (file_data
== NULL
)
5513 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5515 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5517 per_cu
->v
.quick
->mark
= 1;
5521 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
5523 const char *this_real_name
;
5525 if (file_matcher (file_data
->file_names
[j
], false))
5527 per_cu
->v
.quick
->mark
= 1;
5531 /* Before we invoke realpath, which can get expensive when many
5532 files are involved, do a quick comparison of the basenames. */
5533 if (!basenames_may_differ
5534 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5538 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5539 if (file_matcher (this_real_name
, false))
5541 per_cu
->v
.quick
->mark
= 1;
5546 slot
= htab_find_slot (per_cu
->v
.quick
->mark
5547 ? visited_found
.get ()
5548 : visited_not_found
.get (),
5555 dw2_expand_symtabs_matching
5556 (struct objfile
*objfile
,
5557 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5558 const lookup_name_info
&lookup_name
,
5559 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5560 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5561 enum search_domain kind
)
5563 struct dwarf2_per_objfile
*dwarf2_per_objfile
5564 = get_dwarf2_per_objfile (objfile
);
5566 /* index_table is NULL if OBJF_READNOW. */
5567 if (!dwarf2_per_objfile
->index_table
)
5570 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5572 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5574 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5576 kind
, [&] (offset_type idx
)
5578 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5579 expansion_notify
, kind
);
5583 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5586 static struct compunit_symtab
*
5587 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5592 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5593 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5596 if (cust
->includes
== NULL
)
5599 for (i
= 0; cust
->includes
[i
]; ++i
)
5601 struct compunit_symtab
*s
= cust
->includes
[i
];
5603 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5611 static struct compunit_symtab
*
5612 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5613 struct bound_minimal_symbol msymbol
,
5615 struct obj_section
*section
,
5618 struct dwarf2_per_cu_data
*data
;
5619 struct compunit_symtab
*result
;
5621 if (!objfile
->psymtabs_addrmap
)
5624 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5629 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5630 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5631 paddress (get_objfile_arch (objfile
), pc
));
5634 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5636 gdb_assert (result
!= NULL
);
5641 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5642 void *data
, int need_fullname
)
5644 struct dwarf2_per_objfile
*dwarf2_per_objfile
5645 = get_dwarf2_per_objfile (objfile
);
5647 if (!dwarf2_per_objfile
->filenames_cache
)
5649 dwarf2_per_objfile
->filenames_cache
.emplace ();
5651 htab_up
visited (htab_create_alloc (10,
5652 htab_hash_pointer
, htab_eq_pointer
,
5653 NULL
, xcalloc
, xfree
));
5655 /* The rule is CUs specify all the files, including those used
5656 by any TU, so there's no need to scan TUs here. We can
5657 ignore file names coming from already-expanded CUs. */
5659 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5661 dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
5663 if (per_cu
->v
.quick
->compunit_symtab
)
5665 void **slot
= htab_find_slot (visited
.get (),
5666 per_cu
->v
.quick
->file_names
,
5669 *slot
= per_cu
->v
.quick
->file_names
;
5673 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5675 dwarf2_per_cu_data
*per_cu
= dw2_get_cu (dwarf2_per_objfile
, i
);
5676 struct quick_file_names
*file_data
;
5679 /* We only need to look at symtabs not already expanded. */
5680 if (per_cu
->v
.quick
->compunit_symtab
)
5683 file_data
= dw2_get_file_names (per_cu
);
5684 if (file_data
== NULL
)
5687 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5690 /* Already visited. */
5695 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5697 const char *filename
= file_data
->file_names
[j
];
5698 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5703 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5705 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5708 this_real_name
= gdb_realpath (filename
);
5709 (*fun
) (filename
, this_real_name
.get (), data
);
5714 dw2_has_symbols (struct objfile
*objfile
)
5719 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5722 dw2_find_last_source_symtab
,
5723 dw2_forget_cached_source_info
,
5724 dw2_map_symtabs_matching_filename
,
5729 dw2_expand_symtabs_for_function
,
5730 dw2_expand_all_symtabs
,
5731 dw2_expand_symtabs_with_fullname
,
5732 dw2_map_matching_symbols
,
5733 dw2_expand_symtabs_matching
,
5734 dw2_find_pc_sect_compunit_symtab
,
5736 dw2_map_symbol_filenames
5739 /* DWARF-5 debug_names reader. */
5741 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5742 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5744 /* A helper function that reads the .debug_names section in SECTION
5745 and fills in MAP. FILENAME is the name of the file containing the
5746 section; it is used for error reporting.
5748 Returns true if all went well, false otherwise. */
5751 read_debug_names_from_section (struct objfile
*objfile
,
5752 const char *filename
,
5753 struct dwarf2_section_info
*section
,
5754 mapped_debug_names
&map
)
5756 if (dwarf2_section_empty_p (section
))
5759 /* Older elfutils strip versions could keep the section in the main
5760 executable while splitting it for the separate debug info file. */
5761 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5764 dwarf2_read_section (objfile
, section
);
5766 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5768 const gdb_byte
*addr
= section
->buffer
;
5770 bfd
*const abfd
= get_section_bfd_owner (section
);
5772 unsigned int bytes_read
;
5773 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5776 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5777 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5778 if (bytes_read
+ length
!= section
->size
)
5780 /* There may be multiple per-CU indices. */
5781 warning (_("Section .debug_names in %s length %s does not match "
5782 "section length %s, ignoring .debug_names."),
5783 filename
, plongest (bytes_read
+ length
),
5784 pulongest (section
->size
));
5788 /* The version number. */
5789 uint16_t version
= read_2_bytes (abfd
, addr
);
5793 warning (_("Section .debug_names in %s has unsupported version %d, "
5794 "ignoring .debug_names."),
5800 uint16_t padding
= read_2_bytes (abfd
, addr
);
5804 warning (_("Section .debug_names in %s has unsupported padding %d, "
5805 "ignoring .debug_names."),
5810 /* comp_unit_count - The number of CUs in the CU list. */
5811 map
.cu_count
= read_4_bytes (abfd
, addr
);
5814 /* local_type_unit_count - The number of TUs in the local TU
5816 map
.tu_count
= read_4_bytes (abfd
, addr
);
5819 /* foreign_type_unit_count - The number of TUs in the foreign TU
5821 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5823 if (foreign_tu_count
!= 0)
5825 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5826 "ignoring .debug_names."),
5827 filename
, static_cast<unsigned long> (foreign_tu_count
));
5831 /* bucket_count - The number of hash buckets in the hash lookup
5833 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5836 /* name_count - The number of unique names in the index. */
5837 map
.name_count
= read_4_bytes (abfd
, addr
);
5840 /* abbrev_table_size - The size in bytes of the abbreviations
5842 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5845 /* augmentation_string_size - The size in bytes of the augmentation
5846 string. This value is rounded up to a multiple of 4. */
5847 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5849 map
.augmentation_is_gdb
= ((augmentation_string_size
5850 == sizeof (dwarf5_augmentation
))
5851 && memcmp (addr
, dwarf5_augmentation
,
5852 sizeof (dwarf5_augmentation
)) == 0);
5853 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5854 addr
+= augmentation_string_size
;
5857 map
.cu_table_reordered
= addr
;
5858 addr
+= map
.cu_count
* map
.offset_size
;
5860 /* List of Local TUs */
5861 map
.tu_table_reordered
= addr
;
5862 addr
+= map
.tu_count
* map
.offset_size
;
5864 /* Hash Lookup Table */
5865 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5866 addr
+= map
.bucket_count
* 4;
5867 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5868 addr
+= map
.name_count
* 4;
5871 map
.name_table_string_offs_reordered
= addr
;
5872 addr
+= map
.name_count
* map
.offset_size
;
5873 map
.name_table_entry_offs_reordered
= addr
;
5874 addr
+= map
.name_count
* map
.offset_size
;
5876 const gdb_byte
*abbrev_table_start
= addr
;
5879 unsigned int bytes_read
;
5880 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5885 const auto insertpair
5886 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5887 if (!insertpair
.second
)
5889 warning (_("Section .debug_names in %s has duplicate index %s, "
5890 "ignoring .debug_names."),
5891 filename
, pulongest (index_num
));
5894 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5895 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5900 mapped_debug_names::index_val::attr attr
;
5901 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5903 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5905 if (attr
.form
== DW_FORM_implicit_const
)
5907 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5911 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5913 indexval
.attr_vec
.push_back (std::move (attr
));
5916 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5918 warning (_("Section .debug_names in %s has abbreviation_table "
5919 "of size %zu vs. written as %u, ignoring .debug_names."),
5920 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5923 map
.entry_pool
= addr
;
5928 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5932 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5933 const mapped_debug_names
&map
,
5934 dwarf2_section_info
§ion
,
5935 bool is_dwz
, int base_offset
)
5937 sect_offset sect_off_prev
;
5938 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5940 sect_offset sect_off_next
;
5941 if (i
< map
.cu_count
)
5944 = (sect_offset
) (extract_unsigned_integer
5945 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5947 map
.dwarf5_byte_order
));
5950 sect_off_next
= (sect_offset
) section
.size
;
5953 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5954 dwarf2_per_objfile
->all_comp_units
[base_offset
+ (i
- 1)]
5955 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5956 sect_off_prev
, length
);
5958 sect_off_prev
= sect_off_next
;
5962 /* Read the CU list from the mapped index, and use it to create all
5963 the CU objects for this dwarf2_per_objfile. */
5966 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5967 const mapped_debug_names
&map
,
5968 const mapped_debug_names
&dwz_map
)
5970 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5972 dwarf2_per_objfile
->n_comp_units
= map
.cu_count
+ dwz_map
.cu_count
;
5973 dwarf2_per_objfile
->all_comp_units
5974 = XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
5975 dwarf2_per_objfile
->n_comp_units
);
5977 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5978 dwarf2_per_objfile
->info
,
5980 0 /* base_offset */);
5982 if (dwz_map
.cu_count
== 0)
5985 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5986 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5988 map
.cu_count
/* base_offset */);
5991 /* Read .debug_names. If everything went ok, initialize the "quick"
5992 elements of all the CUs and return true. Otherwise, return false. */
5995 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5997 mapped_debug_names
local_map (dwarf2_per_objfile
);
5998 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5999 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6001 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
6002 &dwarf2_per_objfile
->debug_names
,
6006 /* Don't use the index if it's empty. */
6007 if (local_map
.name_count
== 0)
6010 /* If there is a .dwz file, read it so we can get its CU list as
6012 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
6015 if (!read_debug_names_from_section (objfile
,
6016 bfd_get_filename (dwz
->dwz_bfd
),
6017 &dwz
->debug_names
, dwz_map
))
6019 warning (_("could not read '.debug_names' section from %s; skipping"),
6020 bfd_get_filename (dwz
->dwz_bfd
));
6025 create_cus_from_debug_names (dwarf2_per_objfile
, local_map
, dwz_map
);
6027 if (local_map
.tu_count
!= 0)
6029 /* We can only handle a single .debug_types when we have an
6031 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
6034 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
6035 dwarf2_per_objfile
->types
, 0);
6037 create_signatured_type_table_from_debug_names
6038 (dwarf2_per_objfile
, local_map
, section
, &dwarf2_per_objfile
->abbrev
);
6041 create_addrmap_from_aranges (dwarf2_per_objfile
,
6042 &dwarf2_per_objfile
->debug_aranges
);
6044 dwarf2_per_objfile
->debug_names_table
.reset
6045 (new mapped_debug_names (dwarf2_per_objfile
));
6046 *dwarf2_per_objfile
->debug_names_table
= std::move (local_map
);
6047 dwarf2_per_objfile
->using_index
= 1;
6048 dwarf2_per_objfile
->quick_file_names_table
=
6049 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
6054 /* Symbol name hashing function as specified by DWARF-5. */
6057 dwarf5_djb_hash (const char *str_
)
6059 const unsigned char *str
= (const unsigned char *) str_
;
6061 /* Note: tolower here ignores UTF-8, which isn't fully compliant.
6062 See http://dwarfstd.org/ShowIssue.php?issue=161027.1. */
6064 uint32_t hash
= 5381;
6065 while (int c
= *str
++)
6066 hash
= hash
* 33 + tolower (c
);
6070 /* Type used to manage iterating over all CUs looking for a symbol for
6073 class dw2_debug_names_iterator
6076 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
6077 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
6078 dw2_debug_names_iterator (const mapped_debug_names
&map
,
6079 bool want_specific_block
,
6080 block_enum block_index
, domain_enum domain
,
6082 : m_map (map
), m_want_specific_block (want_specific_block
),
6083 m_block_index (block_index
), m_domain (domain
),
6084 m_addr (find_vec_in_debug_names (map
, name
))
6087 dw2_debug_names_iterator (const mapped_debug_names
&map
,
6088 search_domain search
, uint32_t namei
)
6091 m_addr (find_vec_in_debug_names (map
, namei
))
6094 /* Return the next matching CU or NULL if there are no more. */
6095 dwarf2_per_cu_data
*next ();
6098 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
6100 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
6103 /* The internalized form of .debug_names. */
6104 const mapped_debug_names
&m_map
;
6106 /* If true, only look for symbols that match BLOCK_INDEX. */
6107 const bool m_want_specific_block
= false;
6109 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
6110 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
6112 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
6114 /* The kind of symbol we're looking for. */
6115 const domain_enum m_domain
= UNDEF_DOMAIN
;
6116 const search_domain m_search
= ALL_DOMAIN
;
6118 /* The list of CUs from the index entry of the symbol, or NULL if
6120 const gdb_byte
*m_addr
;
6124 mapped_debug_names::namei_to_name (uint32_t namei
) const
6126 const ULONGEST namei_string_offs
6127 = extract_unsigned_integer ((name_table_string_offs_reordered
6128 + namei
* offset_size
),
6131 return read_indirect_string_at_offset
6132 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
6135 /* Find a slot in .debug_names for the object named NAME. If NAME is
6136 found, return pointer to its pool data. If NAME cannot be found,
6140 dw2_debug_names_iterator::find_vec_in_debug_names
6141 (const mapped_debug_names
&map
, const char *name
)
6143 int (*cmp
) (const char *, const char *);
6145 if (current_language
->la_language
== language_cplus
6146 || current_language
->la_language
== language_fortran
6147 || current_language
->la_language
== language_d
)
6149 /* NAME is already canonical. Drop any qualifiers as
6150 .debug_names does not contain any. */
6152 if (strchr (name
, '(') != NULL
)
6154 gdb::unique_xmalloc_ptr
<char> without_params
6155 = cp_remove_params (name
);
6157 if (without_params
!= NULL
)
6159 name
= without_params
.get();
6164 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
6166 const uint32_t full_hash
= dwarf5_djb_hash (name
);
6168 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
6169 (map
.bucket_table_reordered
6170 + (full_hash
% map
.bucket_count
)), 4,
6171 map
.dwarf5_byte_order
);
6175 if (namei
>= map
.name_count
)
6177 complaint (&symfile_complaints
,
6178 _("Wrong .debug_names with name index %u but name_count=%u "
6180 namei
, map
.name_count
,
6181 objfile_name (map
.dwarf2_per_objfile
->objfile
));
6187 const uint32_t namei_full_hash
6188 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
6189 (map
.hash_table_reordered
+ namei
), 4,
6190 map
.dwarf5_byte_order
);
6191 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
6194 if (full_hash
== namei_full_hash
)
6196 const char *const namei_string
= map
.namei_to_name (namei
);
6198 #if 0 /* An expensive sanity check. */
6199 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
6201 complaint (&symfile_complaints
,
6202 _("Wrong .debug_names hash for string at index %u "
6204 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
6209 if (cmp (namei_string
, name
) == 0)
6211 const ULONGEST namei_entry_offs
6212 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
6213 + namei
* map
.offset_size
),
6214 map
.offset_size
, map
.dwarf5_byte_order
);
6215 return map
.entry_pool
+ namei_entry_offs
;
6220 if (namei
>= map
.name_count
)
6226 dw2_debug_names_iterator::find_vec_in_debug_names
6227 (const mapped_debug_names
&map
, uint32_t namei
)
6229 if (namei
>= map
.name_count
)
6231 complaint (&symfile_complaints
,
6232 _("Wrong .debug_names with name index %u but name_count=%u "
6234 namei
, map
.name_count
,
6235 objfile_name (map
.dwarf2_per_objfile
->objfile
));
6239 const ULONGEST namei_entry_offs
6240 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
6241 + namei
* map
.offset_size
),
6242 map
.offset_size
, map
.dwarf5_byte_order
);
6243 return map
.entry_pool
+ namei_entry_offs
;
6246 /* See dw2_debug_names_iterator. */
6248 dwarf2_per_cu_data
*
6249 dw2_debug_names_iterator::next ()
6254 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
6255 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6256 bfd
*const abfd
= objfile
->obfd
;
6260 unsigned int bytes_read
;
6261 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
6262 m_addr
+= bytes_read
;
6266 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
6267 if (indexval_it
== m_map
.abbrev_map
.cend ())
6269 complaint (&symfile_complaints
,
6270 _("Wrong .debug_names undefined abbrev code %s "
6272 pulongest (abbrev
), objfile_name (objfile
));
6275 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
6276 bool have_is_static
= false;
6278 dwarf2_per_cu_data
*per_cu
= NULL
;
6279 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
6284 case DW_FORM_implicit_const
:
6285 ull
= attr
.implicit_const
;
6287 case DW_FORM_flag_present
:
6291 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
6292 m_addr
+= bytes_read
;
6295 complaint (&symfile_complaints
,
6296 _("Unsupported .debug_names form %s [in module %s]"),
6297 dwarf_form_name (attr
.form
),
6298 objfile_name (objfile
));
6301 switch (attr
.dw_idx
)
6303 case DW_IDX_compile_unit
:
6304 /* Don't crash on bad data. */
6305 if (ull
>= dwarf2_per_objfile
->n_comp_units
)
6307 complaint (&symfile_complaints
,
6308 _(".debug_names entry has bad CU index %s"
6311 objfile_name (dwarf2_per_objfile
->objfile
));
6314 per_cu
= dw2_get_cutu (dwarf2_per_objfile
, ull
);
6316 case DW_IDX_type_unit
:
6317 /* Don't crash on bad data. */
6318 if (ull
>= dwarf2_per_objfile
->n_type_units
)
6320 complaint (&symfile_complaints
,
6321 _(".debug_names entry has bad TU index %s"
6324 objfile_name (dwarf2_per_objfile
->objfile
));
6327 per_cu
= dw2_get_cutu (dwarf2_per_objfile
,
6328 dwarf2_per_objfile
->n_comp_units
+ ull
);
6330 case DW_IDX_GNU_internal
:
6331 if (!m_map
.augmentation_is_gdb
)
6333 have_is_static
= true;
6336 case DW_IDX_GNU_external
:
6337 if (!m_map
.augmentation_is_gdb
)
6339 have_is_static
= true;
6345 /* Skip if already read in. */
6346 if (per_cu
->v
.quick
->compunit_symtab
)
6349 /* Check static vs global. */
6352 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
6353 if (m_want_specific_block
&& want_static
!= is_static
)
6357 /* Match dw2_symtab_iter_next, symbol_kind
6358 and debug_names::psymbol_tag. */
6362 switch (indexval
.dwarf_tag
)
6364 case DW_TAG_variable
:
6365 case DW_TAG_subprogram
:
6366 /* Some types are also in VAR_DOMAIN. */
6367 case DW_TAG_typedef
:
6368 case DW_TAG_structure_type
:
6375 switch (indexval
.dwarf_tag
)
6377 case DW_TAG_typedef
:
6378 case DW_TAG_structure_type
:
6385 switch (indexval
.dwarf_tag
)
6388 case DW_TAG_variable
:
6398 /* Match dw2_expand_symtabs_matching, symbol_kind and
6399 debug_names::psymbol_tag. */
6402 case VARIABLES_DOMAIN
:
6403 switch (indexval
.dwarf_tag
)
6405 case DW_TAG_variable
:
6411 case FUNCTIONS_DOMAIN
:
6412 switch (indexval
.dwarf_tag
)
6414 case DW_TAG_subprogram
:
6421 switch (indexval
.dwarf_tag
)
6423 case DW_TAG_typedef
:
6424 case DW_TAG_structure_type
:
6437 static struct compunit_symtab
*
6438 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6439 const char *name
, domain_enum domain
)
6441 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6442 struct dwarf2_per_objfile
*dwarf2_per_objfile
6443 = get_dwarf2_per_objfile (objfile
);
6445 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6448 /* index is NULL if OBJF_READNOW. */
6451 const auto &map
= *mapp
;
6453 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6454 block_index
, domain
, name
);
6456 struct compunit_symtab
*stab_best
= NULL
;
6457 struct dwarf2_per_cu_data
*per_cu
;
6458 while ((per_cu
= iter
.next ()) != NULL
)
6460 struct symbol
*sym
, *with_opaque
= NULL
;
6461 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
6462 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6463 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6465 sym
= block_find_symbol (block
, name
, domain
,
6466 block_find_non_opaque_type_preferred
,
6469 /* Some caution must be observed with overloaded functions and
6470 methods, since the index will not contain any overload
6471 information (but NAME might contain it). */
6474 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6476 if (with_opaque
!= NULL
6477 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6480 /* Keep looking through other CUs. */
6486 /* This dumps minimal information about .debug_names. It is called
6487 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6488 uses this to verify that .debug_names has been loaded. */
6491 dw2_debug_names_dump (struct objfile
*objfile
)
6493 struct dwarf2_per_objfile
*dwarf2_per_objfile
6494 = get_dwarf2_per_objfile (objfile
);
6496 gdb_assert (dwarf2_per_objfile
->using_index
);
6497 printf_filtered (".debug_names:");
6498 if (dwarf2_per_objfile
->debug_names_table
)
6499 printf_filtered (" exists\n");
6501 printf_filtered (" faked for \"readnow\"\n");
6502 printf_filtered ("\n");
6506 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6507 const char *func_name
)
6509 struct dwarf2_per_objfile
*dwarf2_per_objfile
6510 = get_dwarf2_per_objfile (objfile
);
6512 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6513 if (dwarf2_per_objfile
->debug_names_table
)
6515 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6517 /* Note: It doesn't matter what we pass for block_index here. */
6518 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6519 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6521 struct dwarf2_per_cu_data
*per_cu
;
6522 while ((per_cu
= iter
.next ()) != NULL
)
6523 dw2_instantiate_symtab (per_cu
);
6528 dw2_debug_names_expand_symtabs_matching
6529 (struct objfile
*objfile
,
6530 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6531 const lookup_name_info
&lookup_name
,
6532 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6533 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6534 enum search_domain kind
)
6536 struct dwarf2_per_objfile
*dwarf2_per_objfile
6537 = get_dwarf2_per_objfile (objfile
);
6539 /* debug_names_table is NULL if OBJF_READNOW. */
6540 if (!dwarf2_per_objfile
->debug_names_table
)
6543 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6545 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6547 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6549 kind
, [&] (offset_type namei
)
6551 /* The name was matched, now expand corresponding CUs that were
6553 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6555 struct dwarf2_per_cu_data
*per_cu
;
6556 while ((per_cu
= iter
.next ()) != NULL
)
6557 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6562 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6565 dw2_find_last_source_symtab
,
6566 dw2_forget_cached_source_info
,
6567 dw2_map_symtabs_matching_filename
,
6568 dw2_debug_names_lookup_symbol
,
6570 dw2_debug_names_dump
,
6572 dw2_debug_names_expand_symtabs_for_function
,
6573 dw2_expand_all_symtabs
,
6574 dw2_expand_symtabs_with_fullname
,
6575 dw2_map_matching_symbols
,
6576 dw2_debug_names_expand_symtabs_matching
,
6577 dw2_find_pc_sect_compunit_symtab
,
6579 dw2_map_symbol_filenames
6582 /* See symfile.h. */
6585 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6587 struct dwarf2_per_objfile
*dwarf2_per_objfile
6588 = get_dwarf2_per_objfile (objfile
);
6590 /* If we're about to read full symbols, don't bother with the
6591 indices. In this case we also don't care if some other debug
6592 format is making psymtabs, because they are all about to be
6594 if ((objfile
->flags
& OBJF_READNOW
))
6598 dwarf2_per_objfile
->using_index
= 1;
6599 create_all_comp_units (dwarf2_per_objfile
);
6600 create_all_type_units (dwarf2_per_objfile
);
6601 dwarf2_per_objfile
->quick_file_names_table
=
6602 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
6604 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
6605 + dwarf2_per_objfile
->n_type_units
); ++i
)
6607 dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
6609 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6610 struct dwarf2_per_cu_quick_data
);
6613 /* Return 1 so that gdb sees the "quick" functions. However,
6614 these functions will be no-ops because we will have expanded
6616 *index_kind
= dw_index_kind::GDB_INDEX
;
6620 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6622 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6626 if (dwarf2_read_index (objfile
))
6628 *index_kind
= dw_index_kind::GDB_INDEX
;
6637 /* Build a partial symbol table. */
6640 dwarf2_build_psymtabs (struct objfile
*objfile
)
6642 struct dwarf2_per_objfile
*dwarf2_per_objfile
6643 = get_dwarf2_per_objfile (objfile
);
6645 if (objfile
->global_psymbols
.capacity () == 0
6646 && objfile
->static_psymbols
.capacity () == 0)
6647 init_psymbol_list (objfile
, 1024);
6651 /* This isn't really ideal: all the data we allocate on the
6652 objfile's obstack is still uselessly kept around. However,
6653 freeing it seems unsafe. */
6654 psymtab_discarder
psymtabs (objfile
);
6655 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6658 CATCH (except
, RETURN_MASK_ERROR
)
6660 exception_print (gdb_stderr
, except
);
6665 /* Return the total length of the CU described by HEADER. */
6668 get_cu_length (const struct comp_unit_head
*header
)
6670 return header
->initial_length_size
+ header
->length
;
6673 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6676 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6678 sect_offset bottom
= cu_header
->sect_off
;
6679 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6681 return sect_off
>= bottom
&& sect_off
< top
;
6684 /* Find the base address of the compilation unit for range lists and
6685 location lists. It will normally be specified by DW_AT_low_pc.
6686 In DWARF-3 draft 4, the base address could be overridden by
6687 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6688 compilation units with discontinuous ranges. */
6691 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6693 struct attribute
*attr
;
6696 cu
->base_address
= 0;
6698 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6701 cu
->base_address
= attr_value_as_address (attr
);
6706 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6709 cu
->base_address
= attr_value_as_address (attr
);
6715 /* Read in the comp unit header information from the debug_info at info_ptr.
6716 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6717 NOTE: This leaves members offset, first_die_offset to be filled in
6720 static const gdb_byte
*
6721 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6722 const gdb_byte
*info_ptr
,
6723 struct dwarf2_section_info
*section
,
6724 rcuh_kind section_kind
)
6727 unsigned int bytes_read
;
6728 const char *filename
= get_section_file_name (section
);
6729 bfd
*abfd
= get_section_bfd_owner (section
);
6731 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6732 cu_header
->initial_length_size
= bytes_read
;
6733 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6734 info_ptr
+= bytes_read
;
6735 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6737 if (cu_header
->version
< 5)
6738 switch (section_kind
)
6740 case rcuh_kind::COMPILE
:
6741 cu_header
->unit_type
= DW_UT_compile
;
6743 case rcuh_kind::TYPE
:
6744 cu_header
->unit_type
= DW_UT_type
;
6747 internal_error (__FILE__
, __LINE__
,
6748 _("read_comp_unit_head: invalid section_kind"));
6752 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6753 (read_1_byte (abfd
, info_ptr
));
6755 switch (cu_header
->unit_type
)
6758 if (section_kind
!= rcuh_kind::COMPILE
)
6759 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6760 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6764 section_kind
= rcuh_kind::TYPE
;
6767 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6768 "(is %d, should be %d or %d) [in module %s]"),
6769 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6772 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6775 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6778 info_ptr
+= bytes_read
;
6779 if (cu_header
->version
< 5)
6781 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6784 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6785 if (signed_addr
< 0)
6786 internal_error (__FILE__
, __LINE__
,
6787 _("read_comp_unit_head: dwarf from non elf file"));
6788 cu_header
->signed_addr_p
= signed_addr
;
6790 if (section_kind
== rcuh_kind::TYPE
)
6792 LONGEST type_offset
;
6794 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6797 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6798 info_ptr
+= bytes_read
;
6799 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6800 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6801 error (_("Dwarf Error: Too big type_offset in compilation unit "
6802 "header (is %s) [in module %s]"), plongest (type_offset
),
6809 /* Helper function that returns the proper abbrev section for
6812 static struct dwarf2_section_info
*
6813 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6815 struct dwarf2_section_info
*abbrev
;
6816 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6818 if (this_cu
->is_dwz
)
6819 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6821 abbrev
= &dwarf2_per_objfile
->abbrev
;
6826 /* Subroutine of read_and_check_comp_unit_head and
6827 read_and_check_type_unit_head to simplify them.
6828 Perform various error checking on the header. */
6831 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6832 struct comp_unit_head
*header
,
6833 struct dwarf2_section_info
*section
,
6834 struct dwarf2_section_info
*abbrev_section
)
6836 const char *filename
= get_section_file_name (section
);
6838 if (header
->version
< 2 || header
->version
> 5)
6839 error (_("Dwarf Error: wrong version in compilation unit header "
6840 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6843 if (to_underlying (header
->abbrev_sect_off
)
6844 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6845 error (_("Dwarf Error: bad offset (0x%x) in compilation unit header "
6846 "(offset 0x%x + 6) [in module %s]"),
6847 to_underlying (header
->abbrev_sect_off
),
6848 to_underlying (header
->sect_off
),
6851 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6852 avoid potential 32-bit overflow. */
6853 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6855 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6856 "(offset 0x%x + 0) [in module %s]"),
6857 header
->length
, to_underlying (header
->sect_off
),
6861 /* Read in a CU/TU header and perform some basic error checking.
6862 The contents of the header are stored in HEADER.
6863 The result is a pointer to the start of the first DIE. */
6865 static const gdb_byte
*
6866 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6867 struct comp_unit_head
*header
,
6868 struct dwarf2_section_info
*section
,
6869 struct dwarf2_section_info
*abbrev_section
,
6870 const gdb_byte
*info_ptr
,
6871 rcuh_kind section_kind
)
6873 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6875 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6877 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6879 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6881 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6887 /* Fetch the abbreviation table offset from a comp or type unit header. */
6890 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6891 struct dwarf2_section_info
*section
,
6892 sect_offset sect_off
)
6894 bfd
*abfd
= get_section_bfd_owner (section
);
6895 const gdb_byte
*info_ptr
;
6896 unsigned int initial_length_size
, offset_size
;
6899 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6900 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6901 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6902 offset_size
= initial_length_size
== 4 ? 4 : 8;
6903 info_ptr
+= initial_length_size
;
6905 version
= read_2_bytes (abfd
, info_ptr
);
6909 /* Skip unit type and address size. */
6913 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6916 /* Allocate a new partial symtab for file named NAME and mark this new
6917 partial symtab as being an include of PST. */
6920 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6921 struct objfile
*objfile
)
6923 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6925 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6927 /* It shares objfile->objfile_obstack. */
6928 subpst
->dirname
= pst
->dirname
;
6931 subpst
->textlow
= 0;
6932 subpst
->texthigh
= 0;
6934 subpst
->dependencies
6935 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6936 subpst
->dependencies
[0] = pst
;
6937 subpst
->number_of_dependencies
= 1;
6939 subpst
->globals_offset
= 0;
6940 subpst
->n_global_syms
= 0;
6941 subpst
->statics_offset
= 0;
6942 subpst
->n_static_syms
= 0;
6943 subpst
->compunit_symtab
= NULL
;
6944 subpst
->read_symtab
= pst
->read_symtab
;
6947 /* No private part is necessary for include psymtabs. This property
6948 can be used to differentiate between such include psymtabs and
6949 the regular ones. */
6950 subpst
->read_symtab_private
= NULL
;
6953 /* Read the Line Number Program data and extract the list of files
6954 included by the source file represented by PST. Build an include
6955 partial symtab for each of these included files. */
6958 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6959 struct die_info
*die
,
6960 struct partial_symtab
*pst
)
6963 struct attribute
*attr
;
6965 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6967 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6969 return; /* No linetable, so no includes. */
6971 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6972 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6976 hash_signatured_type (const void *item
)
6978 const struct signatured_type
*sig_type
6979 = (const struct signatured_type
*) item
;
6981 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6982 return sig_type
->signature
;
6986 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6988 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6989 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6991 return lhs
->signature
== rhs
->signature
;
6994 /* Allocate a hash table for signatured types. */
6997 allocate_signatured_type_table (struct objfile
*objfile
)
6999 return htab_create_alloc_ex (41,
7000 hash_signatured_type
,
7003 &objfile
->objfile_obstack
,
7004 hashtab_obstack_allocate
,
7005 dummy_obstack_deallocate
);
7008 /* A helper function to add a signatured type CU to a table. */
7011 add_signatured_type_cu_to_table (void **slot
, void *datum
)
7013 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
7014 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
7022 /* A helper for create_debug_types_hash_table. Read types from SECTION
7023 and fill them into TYPES_HTAB. It will process only type units,
7024 therefore DW_UT_type. */
7027 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7028 struct dwo_file
*dwo_file
,
7029 dwarf2_section_info
*section
, htab_t
&types_htab
,
7030 rcuh_kind section_kind
)
7032 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7033 struct dwarf2_section_info
*abbrev_section
;
7035 const gdb_byte
*info_ptr
, *end_ptr
;
7037 abbrev_section
= (dwo_file
!= NULL
7038 ? &dwo_file
->sections
.abbrev
7039 : &dwarf2_per_objfile
->abbrev
);
7041 if (dwarf_read_debug
)
7042 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
7043 get_section_name (section
),
7044 get_section_file_name (abbrev_section
));
7046 dwarf2_read_section (objfile
, section
);
7047 info_ptr
= section
->buffer
;
7049 if (info_ptr
== NULL
)
7052 /* We can't set abfd until now because the section may be empty or
7053 not present, in which case the bfd is unknown. */
7054 abfd
= get_section_bfd_owner (section
);
7056 /* We don't use init_cutu_and_read_dies_simple, or some such, here
7057 because we don't need to read any dies: the signature is in the
7060 end_ptr
= info_ptr
+ section
->size
;
7061 while (info_ptr
< end_ptr
)
7063 struct signatured_type
*sig_type
;
7064 struct dwo_unit
*dwo_tu
;
7066 const gdb_byte
*ptr
= info_ptr
;
7067 struct comp_unit_head header
;
7068 unsigned int length
;
7070 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
7072 /* Initialize it due to a false compiler warning. */
7073 header
.signature
= -1;
7074 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
7076 /* We need to read the type's signature in order to build the hash
7077 table, but we don't need anything else just yet. */
7079 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
7080 abbrev_section
, ptr
, section_kind
);
7082 length
= get_cu_length (&header
);
7084 /* Skip dummy type units. */
7085 if (ptr
>= info_ptr
+ length
7086 || peek_abbrev_code (abfd
, ptr
) == 0
7087 || header
.unit_type
!= DW_UT_type
)
7093 if (types_htab
== NULL
)
7096 types_htab
= allocate_dwo_unit_table (objfile
);
7098 types_htab
= allocate_signatured_type_table (objfile
);
7104 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7106 dwo_tu
->dwo_file
= dwo_file
;
7107 dwo_tu
->signature
= header
.signature
;
7108 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
7109 dwo_tu
->section
= section
;
7110 dwo_tu
->sect_off
= sect_off
;
7111 dwo_tu
->length
= length
;
7115 /* N.B.: type_offset is not usable if this type uses a DWO file.
7116 The real type_offset is in the DWO file. */
7118 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7119 struct signatured_type
);
7120 sig_type
->signature
= header
.signature
;
7121 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
7122 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
7123 sig_type
->per_cu
.is_debug_types
= 1;
7124 sig_type
->per_cu
.section
= section
;
7125 sig_type
->per_cu
.sect_off
= sect_off
;
7126 sig_type
->per_cu
.length
= length
;
7129 slot
= htab_find_slot (types_htab
,
7130 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
7132 gdb_assert (slot
!= NULL
);
7135 sect_offset dup_sect_off
;
7139 const struct dwo_unit
*dup_tu
7140 = (const struct dwo_unit
*) *slot
;
7142 dup_sect_off
= dup_tu
->sect_off
;
7146 const struct signatured_type
*dup_tu
7147 = (const struct signatured_type
*) *slot
;
7149 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
7152 complaint (&symfile_complaints
,
7153 _("debug type entry at offset 0x%x is duplicate to"
7154 " the entry at offset 0x%x, signature %s"),
7155 to_underlying (sect_off
), to_underlying (dup_sect_off
),
7156 hex_string (header
.signature
));
7158 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
7160 if (dwarf_read_debug
> 1)
7161 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
7162 to_underlying (sect_off
),
7163 hex_string (header
.signature
));
7169 /* Create the hash table of all entries in the .debug_types
7170 (or .debug_types.dwo) section(s).
7171 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
7172 otherwise it is NULL.
7174 The result is a pointer to the hash table or NULL if there are no types.
7176 Note: This function processes DWO files only, not DWP files. */
7179 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7180 struct dwo_file
*dwo_file
,
7181 VEC (dwarf2_section_info_def
) *types
,
7185 struct dwarf2_section_info
*section
;
7187 if (VEC_empty (dwarf2_section_info_def
, types
))
7191 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
7193 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
7194 types_htab
, rcuh_kind::TYPE
);
7197 /* Create the hash table of all entries in the .debug_types section,
7198 and initialize all_type_units.
7199 The result is zero if there is an error (e.g. missing .debug_types section),
7200 otherwise non-zero. */
7203 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7205 htab_t types_htab
= NULL
;
7206 struct signatured_type
**iter
;
7208 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
7209 &dwarf2_per_objfile
->info
, types_htab
,
7210 rcuh_kind::COMPILE
);
7211 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
7212 dwarf2_per_objfile
->types
, types_htab
);
7213 if (types_htab
== NULL
)
7215 dwarf2_per_objfile
->signatured_types
= NULL
;
7219 dwarf2_per_objfile
->signatured_types
= types_htab
;
7221 dwarf2_per_objfile
->n_type_units
7222 = dwarf2_per_objfile
->n_allocated_type_units
7223 = htab_elements (types_htab
);
7224 dwarf2_per_objfile
->all_type_units
=
7225 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
7226 iter
= &dwarf2_per_objfile
->all_type_units
[0];
7227 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
7228 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
7229 == dwarf2_per_objfile
->n_type_units
);
7234 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
7235 If SLOT is non-NULL, it is the entry to use in the hash table.
7236 Otherwise we find one. */
7238 static struct signatured_type
*
7239 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
7242 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7243 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
7244 struct signatured_type
*sig_type
;
7246 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
7248 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
7250 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
7251 dwarf2_per_objfile
->n_allocated_type_units
= 1;
7252 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
7253 dwarf2_per_objfile
->all_type_units
7254 = XRESIZEVEC (struct signatured_type
*,
7255 dwarf2_per_objfile
->all_type_units
,
7256 dwarf2_per_objfile
->n_allocated_type_units
);
7257 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
7259 dwarf2_per_objfile
->n_type_units
= n_type_units
;
7261 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7262 struct signatured_type
);
7263 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
7264 sig_type
->signature
= sig
;
7265 sig_type
->per_cu
.is_debug_types
= 1;
7266 if (dwarf2_per_objfile
->using_index
)
7268 sig_type
->per_cu
.v
.quick
=
7269 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7270 struct dwarf2_per_cu_quick_data
);
7275 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7278 gdb_assert (*slot
== NULL
);
7280 /* The rest of sig_type must be filled in by the caller. */
7284 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
7285 Fill in SIG_ENTRY with DWO_ENTRY. */
7288 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7289 struct signatured_type
*sig_entry
,
7290 struct dwo_unit
*dwo_entry
)
7292 /* Make sure we're not clobbering something we don't expect to. */
7293 gdb_assert (! sig_entry
->per_cu
.queued
);
7294 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
7295 if (dwarf2_per_objfile
->using_index
)
7297 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
7298 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
7301 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
7302 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
7303 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
7304 gdb_assert (sig_entry
->type_unit_group
== NULL
);
7305 gdb_assert (sig_entry
->dwo_unit
== NULL
);
7307 sig_entry
->per_cu
.section
= dwo_entry
->section
;
7308 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
7309 sig_entry
->per_cu
.length
= dwo_entry
->length
;
7310 sig_entry
->per_cu
.reading_dwo_directly
= 1;
7311 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
7312 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
7313 sig_entry
->dwo_unit
= dwo_entry
;
7316 /* Subroutine of lookup_signatured_type.
7317 If we haven't read the TU yet, create the signatured_type data structure
7318 for a TU to be read in directly from a DWO file, bypassing the stub.
7319 This is the "Stay in DWO Optimization": When there is no DWP file and we're
7320 using .gdb_index, then when reading a CU we want to stay in the DWO file
7321 containing that CU. Otherwise we could end up reading several other DWO
7322 files (due to comdat folding) to process the transitive closure of all the
7323 mentioned TUs, and that can be slow. The current DWO file will have every
7324 type signature that it needs.
7325 We only do this for .gdb_index because in the psymtab case we already have
7326 to read all the DWOs to build the type unit groups. */
7328 static struct signatured_type
*
7329 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7331 struct dwarf2_per_objfile
*dwarf2_per_objfile
7332 = cu
->per_cu
->dwarf2_per_objfile
;
7333 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7334 struct dwo_file
*dwo_file
;
7335 struct dwo_unit find_dwo_entry
, *dwo_entry
;
7336 struct signatured_type find_sig_entry
, *sig_entry
;
7339 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7341 /* If TU skeletons have been removed then we may not have read in any
7343 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7345 dwarf2_per_objfile
->signatured_types
7346 = allocate_signatured_type_table (objfile
);
7349 /* We only ever need to read in one copy of a signatured type.
7350 Use the global signatured_types array to do our own comdat-folding
7351 of types. If this is the first time we're reading this TU, and
7352 the TU has an entry in .gdb_index, replace the recorded data from
7353 .gdb_index with this TU. */
7355 find_sig_entry
.signature
= sig
;
7356 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7357 &find_sig_entry
, INSERT
);
7358 sig_entry
= (struct signatured_type
*) *slot
;
7360 /* We can get here with the TU already read, *or* in the process of being
7361 read. Don't reassign the global entry to point to this DWO if that's
7362 the case. Also note that if the TU is already being read, it may not
7363 have come from a DWO, the program may be a mix of Fission-compiled
7364 code and non-Fission-compiled code. */
7366 /* Have we already tried to read this TU?
7367 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7368 needn't exist in the global table yet). */
7369 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
7372 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7373 dwo_unit of the TU itself. */
7374 dwo_file
= cu
->dwo_unit
->dwo_file
;
7376 /* Ok, this is the first time we're reading this TU. */
7377 if (dwo_file
->tus
== NULL
)
7379 find_dwo_entry
.signature
= sig
;
7380 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7381 if (dwo_entry
== NULL
)
7384 /* If the global table doesn't have an entry for this TU, add one. */
7385 if (sig_entry
== NULL
)
7386 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7388 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7389 sig_entry
->per_cu
.tu_read
= 1;
7393 /* Subroutine of lookup_signatured_type.
7394 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7395 then try the DWP file. If the TU stub (skeleton) has been removed then
7396 it won't be in .gdb_index. */
7398 static struct signatured_type
*
7399 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7401 struct dwarf2_per_objfile
*dwarf2_per_objfile
7402 = cu
->per_cu
->dwarf2_per_objfile
;
7403 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7404 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7405 struct dwo_unit
*dwo_entry
;
7406 struct signatured_type find_sig_entry
, *sig_entry
;
7409 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7410 gdb_assert (dwp_file
!= NULL
);
7412 /* If TU skeletons have been removed then we may not have read in any
7414 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7416 dwarf2_per_objfile
->signatured_types
7417 = allocate_signatured_type_table (objfile
);
7420 find_sig_entry
.signature
= sig
;
7421 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7422 &find_sig_entry
, INSERT
);
7423 sig_entry
= (struct signatured_type
*) *slot
;
7425 /* Have we already tried to read this TU?
7426 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7427 needn't exist in the global table yet). */
7428 if (sig_entry
!= NULL
)
7431 if (dwp_file
->tus
== NULL
)
7433 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7434 sig
, 1 /* is_debug_types */);
7435 if (dwo_entry
== NULL
)
7438 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7439 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7444 /* Lookup a signature based type for DW_FORM_ref_sig8.
7445 Returns NULL if signature SIG is not present in the table.
7446 It is up to the caller to complain about this. */
7448 static struct signatured_type
*
7449 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7451 struct dwarf2_per_objfile
*dwarf2_per_objfile
7452 = cu
->per_cu
->dwarf2_per_objfile
;
7455 && dwarf2_per_objfile
->using_index
)
7457 /* We're in a DWO/DWP file, and we're using .gdb_index.
7458 These cases require special processing. */
7459 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7460 return lookup_dwo_signatured_type (cu
, sig
);
7462 return lookup_dwp_signatured_type (cu
, sig
);
7466 struct signatured_type find_entry
, *entry
;
7468 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7470 find_entry
.signature
= sig
;
7471 entry
= ((struct signatured_type
*)
7472 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7477 /* Low level DIE reading support. */
7479 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7482 init_cu_die_reader (struct die_reader_specs
*reader
,
7483 struct dwarf2_cu
*cu
,
7484 struct dwarf2_section_info
*section
,
7485 struct dwo_file
*dwo_file
,
7486 struct abbrev_table
*abbrev_table
)
7488 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7489 reader
->abfd
= get_section_bfd_owner (section
);
7491 reader
->dwo_file
= dwo_file
;
7492 reader
->die_section
= section
;
7493 reader
->buffer
= section
->buffer
;
7494 reader
->buffer_end
= section
->buffer
+ section
->size
;
7495 reader
->comp_dir
= NULL
;
7496 reader
->abbrev_table
= abbrev_table
;
7499 /* Subroutine of init_cutu_and_read_dies to simplify it.
7500 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7501 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7504 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7505 from it to the DIE in the DWO. If NULL we are skipping the stub.
7506 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7507 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7508 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7509 STUB_COMP_DIR may be non-NULL.
7510 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7511 are filled in with the info of the DIE from the DWO file.
7512 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7513 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7514 kept around for at least as long as *RESULT_READER.
7516 The result is non-zero if a valid (non-dummy) DIE was found. */
7519 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7520 struct dwo_unit
*dwo_unit
,
7521 struct die_info
*stub_comp_unit_die
,
7522 const char *stub_comp_dir
,
7523 struct die_reader_specs
*result_reader
,
7524 const gdb_byte
**result_info_ptr
,
7525 struct die_info
**result_comp_unit_die
,
7526 int *result_has_children
,
7527 abbrev_table_up
*result_dwo_abbrev_table
)
7529 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7530 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7531 struct dwarf2_cu
*cu
= this_cu
->cu
;
7533 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7534 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7535 int i
,num_extra_attrs
;
7536 struct dwarf2_section_info
*dwo_abbrev_section
;
7537 struct attribute
*attr
;
7538 struct die_info
*comp_unit_die
;
7540 /* At most one of these may be provided. */
7541 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7543 /* These attributes aren't processed until later:
7544 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7545 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7546 referenced later. However, these attributes are found in the stub
7547 which we won't have later. In order to not impose this complication
7548 on the rest of the code, we read them here and copy them to the
7557 if (stub_comp_unit_die
!= NULL
)
7559 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7561 if (! this_cu
->is_debug_types
)
7562 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7563 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7564 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7565 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7566 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7568 /* There should be a DW_AT_addr_base attribute here (if needed).
7569 We need the value before we can process DW_FORM_GNU_addr_index. */
7571 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7573 cu
->addr_base
= DW_UNSND (attr
);
7575 /* There should be a DW_AT_ranges_base attribute here (if needed).
7576 We need the value before we can process DW_AT_ranges. */
7577 cu
->ranges_base
= 0;
7578 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7580 cu
->ranges_base
= DW_UNSND (attr
);
7582 else if (stub_comp_dir
!= NULL
)
7584 /* Reconstruct the comp_dir attribute to simplify the code below. */
7585 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7586 comp_dir
->name
= DW_AT_comp_dir
;
7587 comp_dir
->form
= DW_FORM_string
;
7588 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7589 DW_STRING (comp_dir
) = stub_comp_dir
;
7592 /* Set up for reading the DWO CU/TU. */
7593 cu
->dwo_unit
= dwo_unit
;
7594 dwarf2_section_info
*section
= dwo_unit
->section
;
7595 dwarf2_read_section (objfile
, section
);
7596 abfd
= get_section_bfd_owner (section
);
7597 begin_info_ptr
= info_ptr
= (section
->buffer
7598 + to_underlying (dwo_unit
->sect_off
));
7599 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7601 if (this_cu
->is_debug_types
)
7603 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7605 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7606 &cu
->header
, section
,
7608 info_ptr
, rcuh_kind::TYPE
);
7609 /* This is not an assert because it can be caused by bad debug info. */
7610 if (sig_type
->signature
!= cu
->header
.signature
)
7612 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7613 " TU at offset 0x%x [in module %s]"),
7614 hex_string (sig_type
->signature
),
7615 hex_string (cu
->header
.signature
),
7616 to_underlying (dwo_unit
->sect_off
),
7617 bfd_get_filename (abfd
));
7619 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7620 /* For DWOs coming from DWP files, we don't know the CU length
7621 nor the type's offset in the TU until now. */
7622 dwo_unit
->length
= get_cu_length (&cu
->header
);
7623 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7625 /* Establish the type offset that can be used to lookup the type.
7626 For DWO files, we don't know it until now. */
7627 sig_type
->type_offset_in_section
7628 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7632 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7633 &cu
->header
, section
,
7635 info_ptr
, rcuh_kind::COMPILE
);
7636 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7637 /* For DWOs coming from DWP files, we don't know the CU length
7639 dwo_unit
->length
= get_cu_length (&cu
->header
);
7642 *result_dwo_abbrev_table
7643 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7644 cu
->header
.abbrev_sect_off
);
7645 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7646 result_dwo_abbrev_table
->get ());
7648 /* Read in the die, but leave space to copy over the attributes
7649 from the stub. This has the benefit of simplifying the rest of
7650 the code - all the work to maintain the illusion of a single
7651 DW_TAG_{compile,type}_unit DIE is done here. */
7652 num_extra_attrs
= ((stmt_list
!= NULL
)
7656 + (comp_dir
!= NULL
));
7657 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7658 result_has_children
, num_extra_attrs
);
7660 /* Copy over the attributes from the stub to the DIE we just read in. */
7661 comp_unit_die
= *result_comp_unit_die
;
7662 i
= comp_unit_die
->num_attrs
;
7663 if (stmt_list
!= NULL
)
7664 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7666 comp_unit_die
->attrs
[i
++] = *low_pc
;
7667 if (high_pc
!= NULL
)
7668 comp_unit_die
->attrs
[i
++] = *high_pc
;
7670 comp_unit_die
->attrs
[i
++] = *ranges
;
7671 if (comp_dir
!= NULL
)
7672 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7673 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7675 if (dwarf_die_debug
)
7677 fprintf_unfiltered (gdb_stdlog
,
7678 "Read die from %s@0x%x of %s:\n",
7679 get_section_name (section
),
7680 (unsigned) (begin_info_ptr
- section
->buffer
),
7681 bfd_get_filename (abfd
));
7682 dump_die (comp_unit_die
, dwarf_die_debug
);
7685 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7686 TUs by skipping the stub and going directly to the entry in the DWO file.
7687 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7688 to get it via circuitous means. Blech. */
7689 if (comp_dir
!= NULL
)
7690 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7692 /* Skip dummy compilation units. */
7693 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7694 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7697 *result_info_ptr
= info_ptr
;
7701 /* Subroutine of init_cutu_and_read_dies to simplify it.
7702 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7703 Returns NULL if the specified DWO unit cannot be found. */
7705 static struct dwo_unit
*
7706 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7707 struct die_info
*comp_unit_die
)
7709 struct dwarf2_cu
*cu
= this_cu
->cu
;
7711 struct dwo_unit
*dwo_unit
;
7712 const char *comp_dir
, *dwo_name
;
7714 gdb_assert (cu
!= NULL
);
7716 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7717 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7718 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7720 if (this_cu
->is_debug_types
)
7722 struct signatured_type
*sig_type
;
7724 /* Since this_cu is the first member of struct signatured_type,
7725 we can go from a pointer to one to a pointer to the other. */
7726 sig_type
= (struct signatured_type
*) this_cu
;
7727 signature
= sig_type
->signature
;
7728 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7732 struct attribute
*attr
;
7734 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7736 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7738 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7739 signature
= DW_UNSND (attr
);
7740 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7747 /* Subroutine of init_cutu_and_read_dies to simplify it.
7748 See it for a description of the parameters.
7749 Read a TU directly from a DWO file, bypassing the stub. */
7752 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7753 int use_existing_cu
, int keep
,
7754 die_reader_func_ftype
*die_reader_func
,
7757 std::unique_ptr
<dwarf2_cu
> new_cu
;
7758 struct signatured_type
*sig_type
;
7759 struct die_reader_specs reader
;
7760 const gdb_byte
*info_ptr
;
7761 struct die_info
*comp_unit_die
;
7763 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7765 /* Verify we can do the following downcast, and that we have the
7767 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7768 sig_type
= (struct signatured_type
*) this_cu
;
7769 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7771 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7773 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7774 /* There's no need to do the rereading_dwo_cu handling that
7775 init_cutu_and_read_dies does since we don't read the stub. */
7779 /* If !use_existing_cu, this_cu->cu must be NULL. */
7780 gdb_assert (this_cu
->cu
== NULL
);
7781 new_cu
.reset (new dwarf2_cu (this_cu
));
7784 /* A future optimization, if needed, would be to use an existing
7785 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7786 could share abbrev tables. */
7788 /* The abbreviation table used by READER, this must live at least as long as
7790 abbrev_table_up dwo_abbrev_table
;
7792 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7793 NULL
/* stub_comp_unit_die */,
7794 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7796 &comp_unit_die
, &has_children
,
7797 &dwo_abbrev_table
) == 0)
7803 /* All the "real" work is done here. */
7804 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7806 /* This duplicates the code in init_cutu_and_read_dies,
7807 but the alternative is making the latter more complex.
7808 This function is only for the special case of using DWO files directly:
7809 no point in overly complicating the general case just to handle this. */
7810 if (new_cu
!= NULL
&& keep
)
7812 /* Link this CU into read_in_chain. */
7813 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7814 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7815 /* The chain owns it now. */
7820 /* Initialize a CU (or TU) and read its DIEs.
7821 If the CU defers to a DWO file, read the DWO file as well.
7823 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7824 Otherwise the table specified in the comp unit header is read in and used.
7825 This is an optimization for when we already have the abbrev table.
7827 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7828 Otherwise, a new CU is allocated with xmalloc.
7830 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7831 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7833 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7834 linker) then DIE_READER_FUNC will not get called. */
7837 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7838 struct abbrev_table
*abbrev_table
,
7839 int use_existing_cu
, int keep
,
7840 die_reader_func_ftype
*die_reader_func
,
7843 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7844 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7845 struct dwarf2_section_info
*section
= this_cu
->section
;
7846 bfd
*abfd
= get_section_bfd_owner (section
);
7847 struct dwarf2_cu
*cu
;
7848 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7849 struct die_reader_specs reader
;
7850 struct die_info
*comp_unit_die
;
7852 struct attribute
*attr
;
7853 struct signatured_type
*sig_type
= NULL
;
7854 struct dwarf2_section_info
*abbrev_section
;
7855 /* Non-zero if CU currently points to a DWO file and we need to
7856 reread it. When this happens we need to reread the skeleton die
7857 before we can reread the DWO file (this only applies to CUs, not TUs). */
7858 int rereading_dwo_cu
= 0;
7860 if (dwarf_die_debug
)
7861 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
7862 this_cu
->is_debug_types
? "type" : "comp",
7863 to_underlying (this_cu
->sect_off
));
7865 if (use_existing_cu
)
7868 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7869 file (instead of going through the stub), short-circuit all of this. */
7870 if (this_cu
->reading_dwo_directly
)
7872 /* Narrow down the scope of possibilities to have to understand. */
7873 gdb_assert (this_cu
->is_debug_types
);
7874 gdb_assert (abbrev_table
== NULL
);
7875 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7876 die_reader_func
, data
);
7880 /* This is cheap if the section is already read in. */
7881 dwarf2_read_section (objfile
, section
);
7883 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7885 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7887 std::unique_ptr
<dwarf2_cu
> new_cu
;
7888 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7891 /* If this CU is from a DWO file we need to start over, we need to
7892 refetch the attributes from the skeleton CU.
7893 This could be optimized by retrieving those attributes from when we
7894 were here the first time: the previous comp_unit_die was stored in
7895 comp_unit_obstack. But there's no data yet that we need this
7897 if (cu
->dwo_unit
!= NULL
)
7898 rereading_dwo_cu
= 1;
7902 /* If !use_existing_cu, this_cu->cu must be NULL. */
7903 gdb_assert (this_cu
->cu
== NULL
);
7904 new_cu
.reset (new dwarf2_cu (this_cu
));
7908 /* Get the header. */
7909 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7911 /* We already have the header, there's no need to read it in again. */
7912 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7916 if (this_cu
->is_debug_types
)
7918 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7919 &cu
->header
, section
,
7920 abbrev_section
, info_ptr
,
7923 /* Since per_cu is the first member of struct signatured_type,
7924 we can go from a pointer to one to a pointer to the other. */
7925 sig_type
= (struct signatured_type
*) this_cu
;
7926 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7927 gdb_assert (sig_type
->type_offset_in_tu
7928 == cu
->header
.type_cu_offset_in_tu
);
7929 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7931 /* LENGTH has not been set yet for type units if we're
7932 using .gdb_index. */
7933 this_cu
->length
= get_cu_length (&cu
->header
);
7935 /* Establish the type offset that can be used to lookup the type. */
7936 sig_type
->type_offset_in_section
=
7937 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7939 this_cu
->dwarf_version
= cu
->header
.version
;
7943 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7944 &cu
->header
, section
,
7947 rcuh_kind::COMPILE
);
7949 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7950 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7951 this_cu
->dwarf_version
= cu
->header
.version
;
7955 /* Skip dummy compilation units. */
7956 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7957 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7960 /* If we don't have them yet, read the abbrevs for this compilation unit.
7961 And if we need to read them now, make sure they're freed when we're
7962 done (own the table through ABBREV_TABLE_HOLDER). */
7963 abbrev_table_up abbrev_table_holder
;
7964 if (abbrev_table
!= NULL
)
7965 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7969 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7970 cu
->header
.abbrev_sect_off
);
7971 abbrev_table
= abbrev_table_holder
.get ();
7974 /* Read the top level CU/TU die. */
7975 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7976 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7978 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7979 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7980 table from the DWO file and pass the ownership over to us. It will be
7981 referenced from READER, so we must make sure to free it after we're done
7984 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7985 DWO CU, that this test will fail (the attribute will not be present). */
7986 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7987 abbrev_table_up dwo_abbrev_table
;
7990 struct dwo_unit
*dwo_unit
;
7991 struct die_info
*dwo_comp_unit_die
;
7995 complaint (&symfile_complaints
,
7996 _("compilation unit with DW_AT_GNU_dwo_name"
7997 " has children (offset 0x%x) [in module %s]"),
7998 to_underlying (this_cu
->sect_off
), bfd_get_filename (abfd
));
8000 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
8001 if (dwo_unit
!= NULL
)
8003 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
8004 comp_unit_die
, NULL
,
8006 &dwo_comp_unit_die
, &has_children
,
8007 &dwo_abbrev_table
) == 0)
8012 comp_unit_die
= dwo_comp_unit_die
;
8016 /* Yikes, we couldn't find the rest of the DIE, we only have
8017 the stub. A complaint has already been logged. There's
8018 not much more we can do except pass on the stub DIE to
8019 die_reader_func. We don't want to throw an error on bad
8024 /* All of the above is setup for this call. Yikes. */
8025 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
8027 /* Done, clean up. */
8028 if (new_cu
!= NULL
&& keep
)
8030 /* Link this CU into read_in_chain. */
8031 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
8032 dwarf2_per_objfile
->read_in_chain
= this_cu
;
8033 /* The chain owns it now. */
8038 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
8039 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
8040 to have already done the lookup to find the DWO file).
8042 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
8043 THIS_CU->is_debug_types, but nothing else.
8045 We fill in THIS_CU->length.
8047 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
8048 linker) then DIE_READER_FUNC will not get called.
8050 THIS_CU->cu is always freed when done.
8051 This is done in order to not leave THIS_CU->cu in a state where we have
8052 to care whether it refers to the "main" CU or the DWO CU. */
8055 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
8056 struct dwo_file
*dwo_file
,
8057 die_reader_func_ftype
*die_reader_func
,
8060 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
8061 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8062 struct dwarf2_section_info
*section
= this_cu
->section
;
8063 bfd
*abfd
= get_section_bfd_owner (section
);
8064 struct dwarf2_section_info
*abbrev_section
;
8065 const gdb_byte
*begin_info_ptr
, *info_ptr
;
8066 struct die_reader_specs reader
;
8067 struct die_info
*comp_unit_die
;
8070 if (dwarf_die_debug
)
8071 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
8072 this_cu
->is_debug_types
? "type" : "comp",
8073 to_underlying (this_cu
->sect_off
));
8075 gdb_assert (this_cu
->cu
== NULL
);
8077 abbrev_section
= (dwo_file
!= NULL
8078 ? &dwo_file
->sections
.abbrev
8079 : get_abbrev_section_for_cu (this_cu
));
8081 /* This is cheap if the section is already read in. */
8082 dwarf2_read_section (objfile
, section
);
8084 struct dwarf2_cu
cu (this_cu
);
8086 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
8087 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
8088 &cu
.header
, section
,
8089 abbrev_section
, info_ptr
,
8090 (this_cu
->is_debug_types
8092 : rcuh_kind::COMPILE
));
8094 this_cu
->length
= get_cu_length (&cu
.header
);
8096 /* Skip dummy compilation units. */
8097 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
8098 || peek_abbrev_code (abfd
, info_ptr
) == 0)
8101 abbrev_table_up abbrev_table
8102 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
8103 cu
.header
.abbrev_sect_off
);
8105 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
8106 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
8108 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
8111 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
8112 does not lookup the specified DWO file.
8113 This cannot be used to read DWO files.
8115 THIS_CU->cu is always freed when done.
8116 This is done in order to not leave THIS_CU->cu in a state where we have
8117 to care whether it refers to the "main" CU or the DWO CU.
8118 We can revisit this if the data shows there's a performance issue. */
8121 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
8122 die_reader_func_ftype
*die_reader_func
,
8125 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
8128 /* Type Unit Groups.
8130 Type Unit Groups are a way to collapse the set of all TUs (type units) into
8131 a more manageable set. The grouping is done by DW_AT_stmt_list entry
8132 so that all types coming from the same compilation (.o file) are grouped
8133 together. A future step could be to put the types in the same symtab as
8134 the CU the types ultimately came from. */
8137 hash_type_unit_group (const void *item
)
8139 const struct type_unit_group
*tu_group
8140 = (const struct type_unit_group
*) item
;
8142 return hash_stmt_list_entry (&tu_group
->hash
);
8146 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
8148 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
8149 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
8151 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
8154 /* Allocate a hash table for type unit groups. */
8157 allocate_type_unit_groups_table (struct objfile
*objfile
)
8159 return htab_create_alloc_ex (3,
8160 hash_type_unit_group
,
8163 &objfile
->objfile_obstack
,
8164 hashtab_obstack_allocate
,
8165 dummy_obstack_deallocate
);
8168 /* Type units that don't have DW_AT_stmt_list are grouped into their own
8169 partial symtabs. We combine several TUs per psymtab to not let the size
8170 of any one psymtab grow too big. */
8171 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
8172 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
8174 /* Helper routine for get_type_unit_group.
8175 Create the type_unit_group object used to hold one or more TUs. */
8177 static struct type_unit_group
*
8178 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
8180 struct dwarf2_per_objfile
*dwarf2_per_objfile
8181 = cu
->per_cu
->dwarf2_per_objfile
;
8182 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8183 struct dwarf2_per_cu_data
*per_cu
;
8184 struct type_unit_group
*tu_group
;
8186 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8187 struct type_unit_group
);
8188 per_cu
= &tu_group
->per_cu
;
8189 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8191 if (dwarf2_per_objfile
->using_index
)
8193 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8194 struct dwarf2_per_cu_quick_data
);
8198 unsigned int line_offset
= to_underlying (line_offset_struct
);
8199 struct partial_symtab
*pst
;
8202 /* Give the symtab a useful name for debug purposes. */
8203 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
8204 name
= xstrprintf ("<type_units_%d>",
8205 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
8207 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
8209 pst
= create_partial_symtab (per_cu
, name
);
8215 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
8216 tu_group
->hash
.line_sect_off
= line_offset_struct
;
8221 /* Look up the type_unit_group for type unit CU, and create it if necessary.
8222 STMT_LIST is a DW_AT_stmt_list attribute. */
8224 static struct type_unit_group
*
8225 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
8227 struct dwarf2_per_objfile
*dwarf2_per_objfile
8228 = cu
->per_cu
->dwarf2_per_objfile
;
8229 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8230 struct type_unit_group
*tu_group
;
8232 unsigned int line_offset
;
8233 struct type_unit_group type_unit_group_for_lookup
;
8235 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
8237 dwarf2_per_objfile
->type_unit_groups
=
8238 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
8241 /* Do we need to create a new group, or can we use an existing one? */
8245 line_offset
= DW_UNSND (stmt_list
);
8246 ++tu_stats
->nr_symtab_sharers
;
8250 /* Ugh, no stmt_list. Rare, but we have to handle it.
8251 We can do various things here like create one group per TU or
8252 spread them over multiple groups to split up the expansion work.
8253 To avoid worst case scenarios (too many groups or too large groups)
8254 we, umm, group them in bunches. */
8255 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
8256 | (tu_stats
->nr_stmt_less_type_units
8257 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
8258 ++tu_stats
->nr_stmt_less_type_units
;
8261 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
8262 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
8263 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
8264 &type_unit_group_for_lookup
, INSERT
);
8267 tu_group
= (struct type_unit_group
*) *slot
;
8268 gdb_assert (tu_group
!= NULL
);
8272 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
8273 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
8275 ++tu_stats
->nr_symtabs
;
8281 /* Partial symbol tables. */
8283 /* Create a psymtab named NAME and assign it to PER_CU.
8285 The caller must fill in the following details:
8286 dirname, textlow, texthigh. */
8288 static struct partial_symtab
*
8289 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
8291 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
8292 struct partial_symtab
*pst
;
8294 pst
= start_psymtab_common (objfile
, name
, 0,
8295 objfile
->global_psymbols
,
8296 objfile
->static_psymbols
);
8298 pst
->psymtabs_addrmap_supported
= 1;
8300 /* This is the glue that links PST into GDB's symbol API. */
8301 pst
->read_symtab_private
= per_cu
;
8302 pst
->read_symtab
= dwarf2_read_symtab
;
8303 per_cu
->v
.psymtab
= pst
;
8308 /* The DATA object passed to process_psymtab_comp_unit_reader has this
8311 struct process_psymtab_comp_unit_data
8313 /* True if we are reading a DW_TAG_partial_unit. */
8315 int want_partial_unit
;
8317 /* The "pretend" language that is used if the CU doesn't declare a
8320 enum language pretend_language
;
8323 /* die_reader_func for process_psymtab_comp_unit. */
8326 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
8327 const gdb_byte
*info_ptr
,
8328 struct die_info
*comp_unit_die
,
8332 struct dwarf2_cu
*cu
= reader
->cu
;
8333 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8334 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8335 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8337 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
8338 struct partial_symtab
*pst
;
8339 enum pc_bounds_kind cu_bounds_kind
;
8340 const char *filename
;
8341 struct process_psymtab_comp_unit_data
*info
8342 = (struct process_psymtab_comp_unit_data
*) data
;
8344 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
8347 gdb_assert (! per_cu
->is_debug_types
);
8349 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
8351 cu
->list_in_scope
= &file_symbols
;
8353 /* Allocate a new partial symbol table structure. */
8354 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
8355 if (filename
== NULL
)
8358 pst
= create_partial_symtab (per_cu
, filename
);
8360 /* This must be done before calling dwarf2_build_include_psymtabs. */
8361 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
8363 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8365 dwarf2_find_base_address (comp_unit_die
, cu
);
8367 /* Possibly set the default values of LOWPC and HIGHPC from
8369 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
8370 &best_highpc
, cu
, pst
);
8371 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8372 /* Store the contiguous range if it is not empty; it can be empty for
8373 CUs with no code. */
8374 addrmap_set_empty (objfile
->psymtabs_addrmap
,
8375 gdbarch_adjust_dwarf2_addr (gdbarch
,
8376 best_lowpc
+ baseaddr
),
8377 gdbarch_adjust_dwarf2_addr (gdbarch
,
8378 best_highpc
+ baseaddr
) - 1,
8381 /* Check if comp unit has_children.
8382 If so, read the rest of the partial symbols from this comp unit.
8383 If not, there's no more debug_info for this comp unit. */
8386 struct partial_die_info
*first_die
;
8387 CORE_ADDR lowpc
, highpc
;
8389 lowpc
= ((CORE_ADDR
) -1);
8390 highpc
= ((CORE_ADDR
) 0);
8392 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8394 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8395 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8397 /* If we didn't find a lowpc, set it to highpc to avoid
8398 complaints from `maint check'. */
8399 if (lowpc
== ((CORE_ADDR
) -1))
8402 /* If the compilation unit didn't have an explicit address range,
8403 then use the information extracted from its child dies. */
8404 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8407 best_highpc
= highpc
;
8410 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
8411 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
8413 end_psymtab_common (objfile
, pst
);
8415 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8418 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8419 struct dwarf2_per_cu_data
*iter
;
8421 /* Fill in 'dependencies' here; we fill in 'users' in a
8423 pst
->number_of_dependencies
= len
;
8425 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8427 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8430 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8432 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8435 /* Get the list of files included in the current compilation unit,
8436 and build a psymtab for each of them. */
8437 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8439 if (dwarf_read_debug
)
8441 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8443 fprintf_unfiltered (gdb_stdlog
,
8444 "Psymtab for %s unit @0x%x: %s - %s"
8445 ", %d global, %d static syms\n",
8446 per_cu
->is_debug_types
? "type" : "comp",
8447 to_underlying (per_cu
->sect_off
),
8448 paddress (gdbarch
, pst
->textlow
),
8449 paddress (gdbarch
, pst
->texthigh
),
8450 pst
->n_global_syms
, pst
->n_static_syms
);
8454 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8455 Process compilation unit THIS_CU for a psymtab. */
8458 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8459 int want_partial_unit
,
8460 enum language pretend_language
)
8462 /* If this compilation unit was already read in, free the
8463 cached copy in order to read it in again. This is
8464 necessary because we skipped some symbols when we first
8465 read in the compilation unit (see load_partial_dies).
8466 This problem could be avoided, but the benefit is unclear. */
8467 if (this_cu
->cu
!= NULL
)
8468 free_one_cached_comp_unit (this_cu
);
8470 if (this_cu
->is_debug_types
)
8471 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
8475 process_psymtab_comp_unit_data info
;
8476 info
.want_partial_unit
= want_partial_unit
;
8477 info
.pretend_language
= pretend_language
;
8478 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
8479 process_psymtab_comp_unit_reader
, &info
);
8482 /* Age out any secondary CUs. */
8483 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8486 /* Reader function for build_type_psymtabs. */
8489 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8490 const gdb_byte
*info_ptr
,
8491 struct die_info
*type_unit_die
,
8495 struct dwarf2_per_objfile
*dwarf2_per_objfile
8496 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8497 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8498 struct dwarf2_cu
*cu
= reader
->cu
;
8499 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8500 struct signatured_type
*sig_type
;
8501 struct type_unit_group
*tu_group
;
8502 struct attribute
*attr
;
8503 struct partial_die_info
*first_die
;
8504 CORE_ADDR lowpc
, highpc
;
8505 struct partial_symtab
*pst
;
8507 gdb_assert (data
== NULL
);
8508 gdb_assert (per_cu
->is_debug_types
);
8509 sig_type
= (struct signatured_type
*) per_cu
;
8514 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8515 tu_group
= get_type_unit_group (cu
, attr
);
8517 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8519 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8520 cu
->list_in_scope
= &file_symbols
;
8521 pst
= create_partial_symtab (per_cu
, "");
8524 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8526 lowpc
= (CORE_ADDR
) -1;
8527 highpc
= (CORE_ADDR
) 0;
8528 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8530 end_psymtab_common (objfile
, pst
);
8533 /* Struct used to sort TUs by their abbreviation table offset. */
8535 struct tu_abbrev_offset
8537 struct signatured_type
*sig_type
;
8538 sect_offset abbrev_offset
;
8541 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
8544 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
8546 const struct tu_abbrev_offset
* const *a
8547 = (const struct tu_abbrev_offset
* const*) ap
;
8548 const struct tu_abbrev_offset
* const *b
8549 = (const struct tu_abbrev_offset
* const*) bp
;
8550 sect_offset aoff
= (*a
)->abbrev_offset
;
8551 sect_offset boff
= (*b
)->abbrev_offset
;
8553 return (aoff
> boff
) - (aoff
< boff
);
8556 /* Efficiently read all the type units.
8557 This does the bulk of the work for build_type_psymtabs.
8559 The efficiency is because we sort TUs by the abbrev table they use and
8560 only read each abbrev table once. In one program there are 200K TUs
8561 sharing 8K abbrev tables.
8563 The main purpose of this function is to support building the
8564 dwarf2_per_objfile->type_unit_groups table.
8565 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8566 can collapse the search space by grouping them by stmt_list.
8567 The savings can be significant, in the same program from above the 200K TUs
8568 share 8K stmt_list tables.
8570 FUNC is expected to call get_type_unit_group, which will create the
8571 struct type_unit_group if necessary and add it to
8572 dwarf2_per_objfile->type_unit_groups. */
8575 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8577 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8578 struct cleanup
*cleanups
;
8579 abbrev_table_up abbrev_table
;
8580 sect_offset abbrev_offset
;
8581 struct tu_abbrev_offset
*sorted_by_abbrev
;
8584 /* It's up to the caller to not call us multiple times. */
8585 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8587 if (dwarf2_per_objfile
->n_type_units
== 0)
8590 /* TUs typically share abbrev tables, and there can be way more TUs than
8591 abbrev tables. Sort by abbrev table to reduce the number of times we
8592 read each abbrev table in.
8593 Alternatives are to punt or to maintain a cache of abbrev tables.
8594 This is simpler and efficient enough for now.
8596 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8597 symtab to use). Typically TUs with the same abbrev offset have the same
8598 stmt_list value too so in practice this should work well.
8600 The basic algorithm here is:
8602 sort TUs by abbrev table
8603 for each TU with same abbrev table:
8604 read abbrev table if first user
8605 read TU top level DIE
8606 [IWBN if DWO skeletons had DW_AT_stmt_list]
8609 if (dwarf_read_debug
)
8610 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8612 /* Sort in a separate table to maintain the order of all_type_units
8613 for .gdb_index: TU indices directly index all_type_units. */
8614 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
8615 dwarf2_per_objfile
->n_type_units
);
8616 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
8618 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
8620 sorted_by_abbrev
[i
].sig_type
= sig_type
;
8621 sorted_by_abbrev
[i
].abbrev_offset
=
8622 read_abbrev_offset (dwarf2_per_objfile
,
8623 sig_type
->per_cu
.section
,
8624 sig_type
->per_cu
.sect_off
);
8626 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
8627 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
8628 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
8630 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8632 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
8634 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
8636 /* Switch to the next abbrev table if necessary. */
8637 if (abbrev_table
== NULL
8638 || tu
->abbrev_offset
!= abbrev_offset
)
8640 abbrev_offset
= tu
->abbrev_offset
;
8642 abbrev_table_read_table (dwarf2_per_objfile
,
8643 &dwarf2_per_objfile
->abbrev
,
8645 ++tu_stats
->nr_uniq_abbrev_tables
;
8648 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
.get (),
8649 0, 0, build_type_psymtabs_reader
, NULL
);
8652 do_cleanups (cleanups
);
8655 /* Print collected type unit statistics. */
8658 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8660 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8662 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8663 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
8664 dwarf2_per_objfile
->n_type_units
);
8665 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8666 tu_stats
->nr_uniq_abbrev_tables
);
8667 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8668 tu_stats
->nr_symtabs
);
8669 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8670 tu_stats
->nr_symtab_sharers
);
8671 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8672 tu_stats
->nr_stmt_less_type_units
);
8673 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8674 tu_stats
->nr_all_type_units_reallocs
);
8677 /* Traversal function for build_type_psymtabs. */
8680 build_type_psymtab_dependencies (void **slot
, void *info
)
8682 struct dwarf2_per_objfile
*dwarf2_per_objfile
8683 = (struct dwarf2_per_objfile
*) info
;
8684 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8685 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8686 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8687 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8688 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8689 struct signatured_type
*iter
;
8692 gdb_assert (len
> 0);
8693 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8695 pst
->number_of_dependencies
= len
;
8697 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8699 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8702 gdb_assert (iter
->per_cu
.is_debug_types
);
8703 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8704 iter
->type_unit_group
= tu_group
;
8707 VEC_free (sig_type_ptr
, tu_group
->tus
);
8712 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8713 Build partial symbol tables for the .debug_types comp-units. */
8716 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8718 if (! create_all_type_units (dwarf2_per_objfile
))
8721 build_type_psymtabs_1 (dwarf2_per_objfile
);
8724 /* Traversal function for process_skeletonless_type_unit.
8725 Read a TU in a DWO file and build partial symbols for it. */
8728 process_skeletonless_type_unit (void **slot
, void *info
)
8730 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8731 struct dwarf2_per_objfile
*dwarf2_per_objfile
8732 = (struct dwarf2_per_objfile
*) info
;
8733 struct signatured_type find_entry
, *entry
;
8735 /* If this TU doesn't exist in the global table, add it and read it in. */
8737 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8739 dwarf2_per_objfile
->signatured_types
8740 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8743 find_entry
.signature
= dwo_unit
->signature
;
8744 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8746 /* If we've already seen this type there's nothing to do. What's happening
8747 is we're doing our own version of comdat-folding here. */
8751 /* This does the job that create_all_type_units would have done for
8753 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8754 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8757 /* This does the job that build_type_psymtabs_1 would have done. */
8758 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
8759 build_type_psymtabs_reader
, NULL
);
8764 /* Traversal function for process_skeletonless_type_units. */
8767 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8769 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8771 if (dwo_file
->tus
!= NULL
)
8773 htab_traverse_noresize (dwo_file
->tus
,
8774 process_skeletonless_type_unit
, info
);
8780 /* Scan all TUs of DWO files, verifying we've processed them.
8781 This is needed in case a TU was emitted without its skeleton.
8782 Note: This can't be done until we know what all the DWO files are. */
8785 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8787 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8788 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8789 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8791 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8792 process_dwo_file_for_skeletonless_type_units
,
8793 dwarf2_per_objfile
);
8797 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8800 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8804 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
8806 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
8807 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8813 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8815 /* Set the 'user' field only if it is not already set. */
8816 if (pst
->dependencies
[j
]->user
== NULL
)
8817 pst
->dependencies
[j
]->user
= pst
;
8822 /* Build the partial symbol table by doing a quick pass through the
8823 .debug_info and .debug_abbrev sections. */
8826 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8828 struct cleanup
*back_to
;
8830 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8832 if (dwarf_read_debug
)
8834 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8835 objfile_name (objfile
));
8838 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8840 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8842 /* Any cached compilation units will be linked by the per-objfile
8843 read_in_chain. Make sure to free them when we're done. */
8844 back_to
= make_cleanup (free_cached_comp_units
, dwarf2_per_objfile
);
8846 build_type_psymtabs (dwarf2_per_objfile
);
8848 create_all_comp_units (dwarf2_per_objfile
);
8850 /* Create a temporary address map on a temporary obstack. We later
8851 copy this to the final obstack. */
8852 auto_obstack temp_obstack
;
8854 scoped_restore save_psymtabs_addrmap
8855 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8856 addrmap_create_mutable (&temp_obstack
));
8858 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
8860 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
8862 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8865 /* This has to wait until we read the CUs, we need the list of DWOs. */
8866 process_skeletonless_type_units (dwarf2_per_objfile
);
8868 /* Now that all TUs have been processed we can fill in the dependencies. */
8869 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8871 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8872 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8875 if (dwarf_read_debug
)
8876 print_tu_stats (dwarf2_per_objfile
);
8878 set_partial_user (dwarf2_per_objfile
);
8880 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8881 &objfile
->objfile_obstack
);
8882 /* At this point we want to keep the address map. */
8883 save_psymtabs_addrmap
.release ();
8885 do_cleanups (back_to
);
8887 if (dwarf_read_debug
)
8888 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8889 objfile_name (objfile
));
8892 /* die_reader_func for load_partial_comp_unit. */
8895 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8896 const gdb_byte
*info_ptr
,
8897 struct die_info
*comp_unit_die
,
8901 struct dwarf2_cu
*cu
= reader
->cu
;
8903 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8905 /* Check if comp unit has_children.
8906 If so, read the rest of the partial symbols from this comp unit.
8907 If not, there's no more debug_info for this comp unit. */
8909 load_partial_dies (reader
, info_ptr
, 0);
8912 /* Load the partial DIEs for a secondary CU into memory.
8913 This is also used when rereading a primary CU with load_all_dies. */
8916 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8918 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8919 load_partial_comp_unit_reader
, NULL
);
8923 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8924 struct dwarf2_section_info
*section
,
8925 struct dwarf2_section_info
*abbrev_section
,
8926 unsigned int is_dwz
,
8929 struct dwarf2_per_cu_data
***all_comp_units
)
8931 const gdb_byte
*info_ptr
;
8932 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8934 if (dwarf_read_debug
)
8935 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8936 get_section_name (section
),
8937 get_section_file_name (section
));
8939 dwarf2_read_section (objfile
, section
);
8941 info_ptr
= section
->buffer
;
8943 while (info_ptr
< section
->buffer
+ section
->size
)
8945 struct dwarf2_per_cu_data
*this_cu
;
8947 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8949 comp_unit_head cu_header
;
8950 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8951 abbrev_section
, info_ptr
,
8952 rcuh_kind::COMPILE
);
8954 /* Save the compilation unit for later lookup. */
8955 if (cu_header
.unit_type
!= DW_UT_type
)
8957 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8958 struct dwarf2_per_cu_data
);
8959 memset (this_cu
, 0, sizeof (*this_cu
));
8963 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8964 struct signatured_type
);
8965 memset (sig_type
, 0, sizeof (*sig_type
));
8966 sig_type
->signature
= cu_header
.signature
;
8967 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8968 this_cu
= &sig_type
->per_cu
;
8970 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8971 this_cu
->sect_off
= sect_off
;
8972 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8973 this_cu
->is_dwz
= is_dwz
;
8974 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8975 this_cu
->section
= section
;
8977 if (*n_comp_units
== *n_allocated
)
8980 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
8981 *all_comp_units
, *n_allocated
);
8983 (*all_comp_units
)[*n_comp_units
] = this_cu
;
8986 info_ptr
= info_ptr
+ this_cu
->length
;
8990 /* Create a list of all compilation units in OBJFILE.
8991 This is only done for -readnow and building partial symtabs. */
8994 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8998 struct dwarf2_per_cu_data
**all_comp_units
;
8999 struct dwz_file
*dwz
;
9000 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9004 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
9006 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
9007 &dwarf2_per_objfile
->abbrev
, 0,
9008 &n_allocated
, &n_comp_units
, &all_comp_units
);
9010 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
9012 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
9013 1, &n_allocated
, &n_comp_units
,
9016 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
9017 struct dwarf2_per_cu_data
*,
9019 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
9020 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
9021 xfree (all_comp_units
);
9022 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
9025 /* Process all loaded DIEs for compilation unit CU, starting at
9026 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
9027 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
9028 DW_AT_ranges). See the comments of add_partial_subprogram on how
9029 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
9032 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
9033 CORE_ADDR
*highpc
, int set_addrmap
,
9034 struct dwarf2_cu
*cu
)
9036 struct partial_die_info
*pdi
;
9038 /* Now, march along the PDI's, descending into ones which have
9039 interesting children but skipping the children of the other ones,
9040 until we reach the end of the compilation unit. */
9046 fixup_partial_die (pdi
, cu
);
9048 /* Anonymous namespaces or modules have no name but have interesting
9049 children, so we need to look at them. Ditto for anonymous
9052 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
9053 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
9054 || pdi
->tag
== DW_TAG_imported_unit
9055 || pdi
->tag
== DW_TAG_inlined_subroutine
)
9059 case DW_TAG_subprogram
:
9060 case DW_TAG_inlined_subroutine
:
9061 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9063 case DW_TAG_constant
:
9064 case DW_TAG_variable
:
9065 case DW_TAG_typedef
:
9066 case DW_TAG_union_type
:
9067 if (!pdi
->is_declaration
)
9069 add_partial_symbol (pdi
, cu
);
9072 case DW_TAG_class_type
:
9073 case DW_TAG_interface_type
:
9074 case DW_TAG_structure_type
:
9075 if (!pdi
->is_declaration
)
9077 add_partial_symbol (pdi
, cu
);
9079 if (cu
->language
== language_rust
&& pdi
->has_children
)
9080 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
9083 case DW_TAG_enumeration_type
:
9084 if (!pdi
->is_declaration
)
9085 add_partial_enumeration (pdi
, cu
);
9087 case DW_TAG_base_type
:
9088 case DW_TAG_subrange_type
:
9089 /* File scope base type definitions are added to the partial
9091 add_partial_symbol (pdi
, cu
);
9093 case DW_TAG_namespace
:
9094 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9097 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9099 case DW_TAG_imported_unit
:
9101 struct dwarf2_per_cu_data
*per_cu
;
9103 /* For now we don't handle imported units in type units. */
9104 if (cu
->per_cu
->is_debug_types
)
9106 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9107 " supported in type units [in module %s]"),
9108 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9111 per_cu
= dwarf2_find_containing_comp_unit
9112 (pdi
->d
.sect_off
, pdi
->is_dwz
,
9113 cu
->per_cu
->dwarf2_per_objfile
);
9115 /* Go read the partial unit, if needed. */
9116 if (per_cu
->v
.psymtab
== NULL
)
9117 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
9119 VEC_safe_push (dwarf2_per_cu_ptr
,
9120 cu
->per_cu
->imported_symtabs
, per_cu
);
9123 case DW_TAG_imported_declaration
:
9124 add_partial_symbol (pdi
, cu
);
9131 /* If the die has a sibling, skip to the sibling. */
9133 pdi
= pdi
->die_sibling
;
9137 /* Functions used to compute the fully scoped name of a partial DIE.
9139 Normally, this is simple. For C++, the parent DIE's fully scoped
9140 name is concatenated with "::" and the partial DIE's name.
9141 Enumerators are an exception; they use the scope of their parent
9142 enumeration type, i.e. the name of the enumeration type is not
9143 prepended to the enumerator.
9145 There are two complexities. One is DW_AT_specification; in this
9146 case "parent" means the parent of the target of the specification,
9147 instead of the direct parent of the DIE. The other is compilers
9148 which do not emit DW_TAG_namespace; in this case we try to guess
9149 the fully qualified name of structure types from their members'
9150 linkage names. This must be done using the DIE's children rather
9151 than the children of any DW_AT_specification target. We only need
9152 to do this for structures at the top level, i.e. if the target of
9153 any DW_AT_specification (if any; otherwise the DIE itself) does not
9156 /* Compute the scope prefix associated with PDI's parent, in
9157 compilation unit CU. The result will be allocated on CU's
9158 comp_unit_obstack, or a copy of the already allocated PDI->NAME
9159 field. NULL is returned if no prefix is necessary. */
9161 partial_die_parent_scope (struct partial_die_info
*pdi
,
9162 struct dwarf2_cu
*cu
)
9164 const char *grandparent_scope
;
9165 struct partial_die_info
*parent
, *real_pdi
;
9167 /* We need to look at our parent DIE; if we have a DW_AT_specification,
9168 then this means the parent of the specification DIE. */
9171 while (real_pdi
->has_specification
)
9172 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
9173 real_pdi
->spec_is_dwz
, cu
);
9175 parent
= real_pdi
->die_parent
;
9179 if (parent
->scope_set
)
9180 return parent
->scope
;
9182 fixup_partial_die (parent
, cu
);
9184 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
9186 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9187 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9188 Work around this problem here. */
9189 if (cu
->language
== language_cplus
9190 && parent
->tag
== DW_TAG_namespace
9191 && strcmp (parent
->name
, "::") == 0
9192 && grandparent_scope
== NULL
)
9194 parent
->scope
= NULL
;
9195 parent
->scope_set
= 1;
9199 if (pdi
->tag
== DW_TAG_enumerator
)
9200 /* Enumerators should not get the name of the enumeration as a prefix. */
9201 parent
->scope
= grandparent_scope
;
9202 else if (parent
->tag
== DW_TAG_namespace
9203 || parent
->tag
== DW_TAG_module
9204 || parent
->tag
== DW_TAG_structure_type
9205 || parent
->tag
== DW_TAG_class_type
9206 || parent
->tag
== DW_TAG_interface_type
9207 || parent
->tag
== DW_TAG_union_type
9208 || parent
->tag
== DW_TAG_enumeration_type
)
9210 if (grandparent_scope
== NULL
)
9211 parent
->scope
= parent
->name
;
9213 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
9215 parent
->name
, 0, cu
);
9219 /* FIXME drow/2004-04-01: What should we be doing with
9220 function-local names? For partial symbols, we should probably be
9222 complaint (&symfile_complaints
,
9223 _("unhandled containing DIE tag %d for DIE at %d"),
9224 parent
->tag
, to_underlying (pdi
->sect_off
));
9225 parent
->scope
= grandparent_scope
;
9228 parent
->scope_set
= 1;
9229 return parent
->scope
;
9232 /* Return the fully scoped name associated with PDI, from compilation unit
9233 CU. The result will be allocated with malloc. */
9236 partial_die_full_name (struct partial_die_info
*pdi
,
9237 struct dwarf2_cu
*cu
)
9239 const char *parent_scope
;
9241 /* If this is a template instantiation, we can not work out the
9242 template arguments from partial DIEs. So, unfortunately, we have
9243 to go through the full DIEs. At least any work we do building
9244 types here will be reused if full symbols are loaded later. */
9245 if (pdi
->has_template_arguments
)
9247 fixup_partial_die (pdi
, cu
);
9249 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
9251 struct die_info
*die
;
9252 struct attribute attr
;
9253 struct dwarf2_cu
*ref_cu
= cu
;
9255 /* DW_FORM_ref_addr is using section offset. */
9256 attr
.name
= (enum dwarf_attribute
) 0;
9257 attr
.form
= DW_FORM_ref_addr
;
9258 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
9259 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
9261 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
9265 parent_scope
= partial_die_parent_scope (pdi
, cu
);
9266 if (parent_scope
== NULL
)
9269 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
9273 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
9275 struct dwarf2_per_objfile
*dwarf2_per_objfile
9276 = cu
->per_cu
->dwarf2_per_objfile
;
9277 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9278 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9280 const char *actual_name
= NULL
;
9282 char *built_actual_name
;
9284 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9286 built_actual_name
= partial_die_full_name (pdi
, cu
);
9287 if (built_actual_name
!= NULL
)
9288 actual_name
= built_actual_name
;
9290 if (actual_name
== NULL
)
9291 actual_name
= pdi
->name
;
9295 case DW_TAG_inlined_subroutine
:
9296 case DW_TAG_subprogram
:
9297 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
9298 if (pdi
->is_external
|| cu
->language
== language_ada
)
9300 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
9301 of the global scope. But in Ada, we want to be able to access
9302 nested procedures globally. So all Ada subprograms are stored
9303 in the global scope. */
9304 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9305 built_actual_name
!= NULL
,
9306 VAR_DOMAIN
, LOC_BLOCK
,
9307 &objfile
->global_psymbols
,
9308 addr
, cu
->language
, objfile
);
9312 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9313 built_actual_name
!= NULL
,
9314 VAR_DOMAIN
, LOC_BLOCK
,
9315 &objfile
->static_psymbols
,
9316 addr
, cu
->language
, objfile
);
9319 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
9320 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
9322 case DW_TAG_constant
:
9324 std::vector
<partial_symbol
*> *list
;
9326 if (pdi
->is_external
)
9327 list
= &objfile
->global_psymbols
;
9329 list
= &objfile
->static_psymbols
;
9330 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9331 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
9332 list
, 0, cu
->language
, objfile
);
9335 case DW_TAG_variable
:
9337 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
9341 && !dwarf2_per_objfile
->has_section_at_zero
)
9343 /* A global or static variable may also have been stripped
9344 out by the linker if unused, in which case its address
9345 will be nullified; do not add such variables into partial
9346 symbol table then. */
9348 else if (pdi
->is_external
)
9351 Don't enter into the minimal symbol tables as there is
9352 a minimal symbol table entry from the ELF symbols already.
9353 Enter into partial symbol table if it has a location
9354 descriptor or a type.
9355 If the location descriptor is missing, new_symbol will create
9356 a LOC_UNRESOLVED symbol, the address of the variable will then
9357 be determined from the minimal symbol table whenever the variable
9359 The address for the partial symbol table entry is not
9360 used by GDB, but it comes in handy for debugging partial symbol
9363 if (pdi
->d
.locdesc
|| pdi
->has_type
)
9364 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9365 built_actual_name
!= NULL
,
9366 VAR_DOMAIN
, LOC_STATIC
,
9367 &objfile
->global_psymbols
,
9369 cu
->language
, objfile
);
9373 int has_loc
= pdi
->d
.locdesc
!= NULL
;
9375 /* Static Variable. Skip symbols whose value we cannot know (those
9376 without location descriptors or constant values). */
9377 if (!has_loc
&& !pdi
->has_const_value
)
9379 xfree (built_actual_name
);
9383 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9384 built_actual_name
!= NULL
,
9385 VAR_DOMAIN
, LOC_STATIC
,
9386 &objfile
->static_psymbols
,
9387 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
9388 cu
->language
, objfile
);
9391 case DW_TAG_typedef
:
9392 case DW_TAG_base_type
:
9393 case DW_TAG_subrange_type
:
9394 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9395 built_actual_name
!= NULL
,
9396 VAR_DOMAIN
, LOC_TYPEDEF
,
9397 &objfile
->static_psymbols
,
9398 0, cu
->language
, objfile
);
9400 case DW_TAG_imported_declaration
:
9401 case DW_TAG_namespace
:
9402 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9403 built_actual_name
!= NULL
,
9404 VAR_DOMAIN
, LOC_TYPEDEF
,
9405 &objfile
->global_psymbols
,
9406 0, cu
->language
, objfile
);
9409 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9410 built_actual_name
!= NULL
,
9411 MODULE_DOMAIN
, LOC_TYPEDEF
,
9412 &objfile
->global_psymbols
,
9413 0, cu
->language
, objfile
);
9415 case DW_TAG_class_type
:
9416 case DW_TAG_interface_type
:
9417 case DW_TAG_structure_type
:
9418 case DW_TAG_union_type
:
9419 case DW_TAG_enumeration_type
:
9420 /* Skip external references. The DWARF standard says in the section
9421 about "Structure, Union, and Class Type Entries": "An incomplete
9422 structure, union or class type is represented by a structure,
9423 union or class entry that does not have a byte size attribute
9424 and that has a DW_AT_declaration attribute." */
9425 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9427 xfree (built_actual_name
);
9431 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9432 static vs. global. */
9433 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9434 built_actual_name
!= NULL
,
9435 STRUCT_DOMAIN
, LOC_TYPEDEF
,
9436 cu
->language
== language_cplus
9437 ? &objfile
->global_psymbols
9438 : &objfile
->static_psymbols
,
9439 0, cu
->language
, objfile
);
9442 case DW_TAG_enumerator
:
9443 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9444 built_actual_name
!= NULL
,
9445 VAR_DOMAIN
, LOC_CONST
,
9446 cu
->language
== language_cplus
9447 ? &objfile
->global_psymbols
9448 : &objfile
->static_psymbols
,
9449 0, cu
->language
, objfile
);
9455 xfree (built_actual_name
);
9458 /* Read a partial die corresponding to a namespace; also, add a symbol
9459 corresponding to that namespace to the symbol table. NAMESPACE is
9460 the name of the enclosing namespace. */
9463 add_partial_namespace (struct partial_die_info
*pdi
,
9464 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9465 int set_addrmap
, struct dwarf2_cu
*cu
)
9467 /* Add a symbol for the namespace. */
9469 add_partial_symbol (pdi
, cu
);
9471 /* Now scan partial symbols in that namespace. */
9473 if (pdi
->has_children
)
9474 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9477 /* Read a partial die corresponding to a Fortran module. */
9480 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9481 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9483 /* Add a symbol for the namespace. */
9485 add_partial_symbol (pdi
, cu
);
9487 /* Now scan partial symbols in that module. */
9489 if (pdi
->has_children
)
9490 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9493 /* Read a partial die corresponding to a subprogram or an inlined
9494 subprogram and create a partial symbol for that subprogram.
9495 When the CU language allows it, this routine also defines a partial
9496 symbol for each nested subprogram that this subprogram contains.
9497 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9498 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9500 PDI may also be a lexical block, in which case we simply search
9501 recursively for subprograms defined inside that lexical block.
9502 Again, this is only performed when the CU language allows this
9503 type of definitions. */
9506 add_partial_subprogram (struct partial_die_info
*pdi
,
9507 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9508 int set_addrmap
, struct dwarf2_cu
*cu
)
9510 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9512 if (pdi
->has_pc_info
)
9514 if (pdi
->lowpc
< *lowpc
)
9515 *lowpc
= pdi
->lowpc
;
9516 if (pdi
->highpc
> *highpc
)
9517 *highpc
= pdi
->highpc
;
9520 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9521 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9526 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9527 SECT_OFF_TEXT (objfile
));
9528 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9529 pdi
->lowpc
+ baseaddr
);
9530 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9531 pdi
->highpc
+ baseaddr
);
9532 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9533 cu
->per_cu
->v
.psymtab
);
9537 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9539 if (!pdi
->is_declaration
)
9540 /* Ignore subprogram DIEs that do not have a name, they are
9541 illegal. Do not emit a complaint at this point, we will
9542 do so when we convert this psymtab into a symtab. */
9544 add_partial_symbol (pdi
, cu
);
9548 if (! pdi
->has_children
)
9551 if (cu
->language
== language_ada
)
9553 pdi
= pdi
->die_child
;
9556 fixup_partial_die (pdi
, cu
);
9557 if (pdi
->tag
== DW_TAG_subprogram
9558 || pdi
->tag
== DW_TAG_inlined_subroutine
9559 || pdi
->tag
== DW_TAG_lexical_block
)
9560 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9561 pdi
= pdi
->die_sibling
;
9566 /* Read a partial die corresponding to an enumeration type. */
9569 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9570 struct dwarf2_cu
*cu
)
9572 struct partial_die_info
*pdi
;
9574 if (enum_pdi
->name
!= NULL
)
9575 add_partial_symbol (enum_pdi
, cu
);
9577 pdi
= enum_pdi
->die_child
;
9580 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9581 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
9583 add_partial_symbol (pdi
, cu
);
9584 pdi
= pdi
->die_sibling
;
9588 /* Return the initial uleb128 in the die at INFO_PTR. */
9591 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9593 unsigned int bytes_read
;
9595 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9598 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9599 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9601 Return the corresponding abbrev, or NULL if the number is zero (indicating
9602 an empty DIE). In either case *BYTES_READ will be set to the length of
9603 the initial number. */
9605 static struct abbrev_info
*
9606 peek_die_abbrev (const die_reader_specs
&reader
,
9607 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9609 dwarf2_cu
*cu
= reader
.cu
;
9610 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9611 unsigned int abbrev_number
9612 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9614 if (abbrev_number
== 0)
9617 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9620 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9621 " at offset 0x%x [in module %s]"),
9622 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9623 to_underlying (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9629 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9630 Returns a pointer to the end of a series of DIEs, terminated by an empty
9631 DIE. Any children of the skipped DIEs will also be skipped. */
9633 static const gdb_byte
*
9634 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9638 unsigned int bytes_read
;
9639 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9642 return info_ptr
+ bytes_read
;
9644 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9648 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9649 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9650 abbrev corresponding to that skipped uleb128 should be passed in
9651 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9654 static const gdb_byte
*
9655 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9656 struct abbrev_info
*abbrev
)
9658 unsigned int bytes_read
;
9659 struct attribute attr
;
9660 bfd
*abfd
= reader
->abfd
;
9661 struct dwarf2_cu
*cu
= reader
->cu
;
9662 const gdb_byte
*buffer
= reader
->buffer
;
9663 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9664 unsigned int form
, i
;
9666 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9668 /* The only abbrev we care about is DW_AT_sibling. */
9669 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9671 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9672 if (attr
.form
== DW_FORM_ref_addr
)
9673 complaint (&symfile_complaints
,
9674 _("ignoring absolute DW_AT_sibling"));
9677 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9678 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9680 if (sibling_ptr
< info_ptr
)
9681 complaint (&symfile_complaints
,
9682 _("DW_AT_sibling points backwards"));
9683 else if (sibling_ptr
> reader
->buffer_end
)
9684 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9690 /* If it isn't DW_AT_sibling, skip this attribute. */
9691 form
= abbrev
->attrs
[i
].form
;
9695 case DW_FORM_ref_addr
:
9696 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9697 and later it is offset sized. */
9698 if (cu
->header
.version
== 2)
9699 info_ptr
+= cu
->header
.addr_size
;
9701 info_ptr
+= cu
->header
.offset_size
;
9703 case DW_FORM_GNU_ref_alt
:
9704 info_ptr
+= cu
->header
.offset_size
;
9707 info_ptr
+= cu
->header
.addr_size
;
9714 case DW_FORM_flag_present
:
9715 case DW_FORM_implicit_const
:
9727 case DW_FORM_ref_sig8
:
9730 case DW_FORM_data16
:
9733 case DW_FORM_string
:
9734 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9735 info_ptr
+= bytes_read
;
9737 case DW_FORM_sec_offset
:
9739 case DW_FORM_GNU_strp_alt
:
9740 info_ptr
+= cu
->header
.offset_size
;
9742 case DW_FORM_exprloc
:
9744 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9745 info_ptr
+= bytes_read
;
9747 case DW_FORM_block1
:
9748 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9750 case DW_FORM_block2
:
9751 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9753 case DW_FORM_block4
:
9754 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9758 case DW_FORM_ref_udata
:
9759 case DW_FORM_GNU_addr_index
:
9760 case DW_FORM_GNU_str_index
:
9761 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9763 case DW_FORM_indirect
:
9764 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9765 info_ptr
+= bytes_read
;
9766 /* We need to continue parsing from here, so just go back to
9768 goto skip_attribute
;
9771 error (_("Dwarf Error: Cannot handle %s "
9772 "in DWARF reader [in module %s]"),
9773 dwarf_form_name (form
),
9774 bfd_get_filename (abfd
));
9778 if (abbrev
->has_children
)
9779 return skip_children (reader
, info_ptr
);
9784 /* Locate ORIG_PDI's sibling.
9785 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9787 static const gdb_byte
*
9788 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9789 struct partial_die_info
*orig_pdi
,
9790 const gdb_byte
*info_ptr
)
9792 /* Do we know the sibling already? */
9794 if (orig_pdi
->sibling
)
9795 return orig_pdi
->sibling
;
9797 /* Are there any children to deal with? */
9799 if (!orig_pdi
->has_children
)
9802 /* Skip the children the long way. */
9804 return skip_children (reader
, info_ptr
);
9807 /* Expand this partial symbol table into a full symbol table. SELF is
9811 dwarf2_read_symtab (struct partial_symtab
*self
,
9812 struct objfile
*objfile
)
9814 struct dwarf2_per_objfile
*dwarf2_per_objfile
9815 = get_dwarf2_per_objfile (objfile
);
9819 warning (_("bug: psymtab for %s is already read in."),
9826 printf_filtered (_("Reading in symbols for %s..."),
9828 gdb_flush (gdb_stdout
);
9831 /* If this psymtab is constructed from a debug-only objfile, the
9832 has_section_at_zero flag will not necessarily be correct. We
9833 can get the correct value for this flag by looking at the data
9834 associated with the (presumably stripped) associated objfile. */
9835 if (objfile
->separate_debug_objfile_backlink
)
9837 struct dwarf2_per_objfile
*dpo_backlink
9838 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9840 dwarf2_per_objfile
->has_section_at_zero
9841 = dpo_backlink
->has_section_at_zero
;
9844 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9846 psymtab_to_symtab_1 (self
);
9848 /* Finish up the debug error message. */
9850 printf_filtered (_("done.\n"));
9853 process_cu_includes (dwarf2_per_objfile
);
9856 /* Reading in full CUs. */
9858 /* Add PER_CU to the queue. */
9861 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9862 enum language pretend_language
)
9864 struct dwarf2_queue_item
*item
;
9867 item
= XNEW (struct dwarf2_queue_item
);
9868 item
->per_cu
= per_cu
;
9869 item
->pretend_language
= pretend_language
;
9872 if (dwarf2_queue
== NULL
)
9873 dwarf2_queue
= item
;
9875 dwarf2_queue_tail
->next
= item
;
9877 dwarf2_queue_tail
= item
;
9880 /* If PER_CU is not yet queued, add it to the queue.
9881 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9883 The result is non-zero if PER_CU was queued, otherwise the result is zero
9884 meaning either PER_CU is already queued or it is already loaded.
9886 N.B. There is an invariant here that if a CU is queued then it is loaded.
9887 The caller is required to load PER_CU if we return non-zero. */
9890 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9891 struct dwarf2_per_cu_data
*per_cu
,
9892 enum language pretend_language
)
9894 /* We may arrive here during partial symbol reading, if we need full
9895 DIEs to process an unusual case (e.g. template arguments). Do
9896 not queue PER_CU, just tell our caller to load its DIEs. */
9897 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9899 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9904 /* Mark the dependence relation so that we don't flush PER_CU
9906 if (dependent_cu
!= NULL
)
9907 dwarf2_add_dependence (dependent_cu
, per_cu
);
9909 /* If it's already on the queue, we have nothing to do. */
9913 /* If the compilation unit is already loaded, just mark it as
9915 if (per_cu
->cu
!= NULL
)
9917 per_cu
->cu
->last_used
= 0;
9921 /* Add it to the queue. */
9922 queue_comp_unit (per_cu
, pretend_language
);
9927 /* Process the queue. */
9930 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9932 struct dwarf2_queue_item
*item
, *next_item
;
9934 if (dwarf_read_debug
)
9936 fprintf_unfiltered (gdb_stdlog
,
9937 "Expanding one or more symtabs of objfile %s ...\n",
9938 objfile_name (dwarf2_per_objfile
->objfile
));
9941 /* The queue starts out with one item, but following a DIE reference
9942 may load a new CU, adding it to the end of the queue. */
9943 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9945 if ((dwarf2_per_objfile
->using_index
9946 ? !item
->per_cu
->v
.quick
->compunit_symtab
9947 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9948 /* Skip dummy CUs. */
9949 && item
->per_cu
->cu
!= NULL
)
9951 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9952 unsigned int debug_print_threshold
;
9955 if (per_cu
->is_debug_types
)
9957 struct signatured_type
*sig_type
=
9958 (struct signatured_type
*) per_cu
;
9960 sprintf (buf
, "TU %s at offset 0x%x",
9961 hex_string (sig_type
->signature
),
9962 to_underlying (per_cu
->sect_off
));
9963 /* There can be 100s of TUs.
9964 Only print them in verbose mode. */
9965 debug_print_threshold
= 2;
9969 sprintf (buf
, "CU at offset 0x%x",
9970 to_underlying (per_cu
->sect_off
));
9971 debug_print_threshold
= 1;
9974 if (dwarf_read_debug
>= debug_print_threshold
)
9975 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9977 if (per_cu
->is_debug_types
)
9978 process_full_type_unit (per_cu
, item
->pretend_language
);
9980 process_full_comp_unit (per_cu
, item
->pretend_language
);
9982 if (dwarf_read_debug
>= debug_print_threshold
)
9983 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9986 item
->per_cu
->queued
= 0;
9987 next_item
= item
->next
;
9991 dwarf2_queue_tail
= NULL
;
9993 if (dwarf_read_debug
)
9995 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9996 objfile_name (dwarf2_per_objfile
->objfile
));
10000 /* Read in full symbols for PST, and anything it depends on. */
10003 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
10005 struct dwarf2_per_cu_data
*per_cu
;
10011 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
10012 if (!pst
->dependencies
[i
]->readin
10013 && pst
->dependencies
[i
]->user
== NULL
)
10015 /* Inform about additional files that need to be read in. */
10018 /* FIXME: i18n: Need to make this a single string. */
10019 fputs_filtered (" ", gdb_stdout
);
10021 fputs_filtered ("and ", gdb_stdout
);
10023 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
10024 wrap_here (""); /* Flush output. */
10025 gdb_flush (gdb_stdout
);
10027 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
10030 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
10032 if (per_cu
== NULL
)
10034 /* It's an include file, no symbols to read for it.
10035 Everything is in the parent symtab. */
10040 dw2_do_instantiate_symtab (per_cu
);
10043 /* Trivial hash function for die_info: the hash value of a DIE
10044 is its offset in .debug_info for this objfile. */
10047 die_hash (const void *item
)
10049 const struct die_info
*die
= (const struct die_info
*) item
;
10051 return to_underlying (die
->sect_off
);
10054 /* Trivial comparison function for die_info structures: two DIEs
10055 are equal if they have the same offset. */
10058 die_eq (const void *item_lhs
, const void *item_rhs
)
10060 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
10061 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
10063 return die_lhs
->sect_off
== die_rhs
->sect_off
;
10066 /* die_reader_func for load_full_comp_unit.
10067 This is identical to read_signatured_type_reader,
10068 but is kept separate for now. */
10071 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
10072 const gdb_byte
*info_ptr
,
10073 struct die_info
*comp_unit_die
,
10077 struct dwarf2_cu
*cu
= reader
->cu
;
10078 enum language
*language_ptr
= (enum language
*) data
;
10080 gdb_assert (cu
->die_hash
== NULL
);
10082 htab_create_alloc_ex (cu
->header
.length
/ 12,
10086 &cu
->comp_unit_obstack
,
10087 hashtab_obstack_allocate
,
10088 dummy_obstack_deallocate
);
10091 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
10092 &info_ptr
, comp_unit_die
);
10093 cu
->dies
= comp_unit_die
;
10094 /* comp_unit_die is not stored in die_hash, no need. */
10096 /* We try not to read any attributes in this function, because not
10097 all CUs needed for references have been loaded yet, and symbol
10098 table processing isn't initialized. But we have to set the CU language,
10099 or we won't be able to build types correctly.
10100 Similarly, if we do not read the producer, we can not apply
10101 producer-specific interpretation. */
10102 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
10105 /* Load the DIEs associated with PER_CU into memory. */
10108 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
10109 enum language pretend_language
)
10111 gdb_assert (! this_cu
->is_debug_types
);
10113 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
10114 load_full_comp_unit_reader
, &pretend_language
);
10117 /* Add a DIE to the delayed physname list. */
10120 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
10121 const char *name
, struct die_info
*die
,
10122 struct dwarf2_cu
*cu
)
10124 struct delayed_method_info mi
;
10126 mi
.fnfield_index
= fnfield_index
;
10130 cu
->method_list
.push_back (mi
);
10133 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
10134 "const" / "volatile". If so, decrements LEN by the length of the
10135 modifier and return true. Otherwise return false. */
10139 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
10141 size_t mod_len
= sizeof (mod
) - 1;
10142 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
10150 /* Compute the physnames of any methods on the CU's method list.
10152 The computation of method physnames is delayed in order to avoid the
10153 (bad) condition that one of the method's formal parameters is of an as yet
10154 incomplete type. */
10157 compute_delayed_physnames (struct dwarf2_cu
*cu
)
10159 /* Only C++ delays computing physnames. */
10160 if (cu
->method_list
.empty ())
10162 gdb_assert (cu
->language
== language_cplus
);
10164 for (struct delayed_method_info
&mi
: cu
->method_list
)
10166 const char *physname
;
10167 struct fn_fieldlist
*fn_flp
10168 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
10169 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
10170 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
10171 = physname
? physname
: "";
10173 /* Since there's no tag to indicate whether a method is a
10174 const/volatile overload, extract that information out of the
10176 if (physname
!= NULL
)
10178 size_t len
= strlen (physname
);
10182 if (physname
[len
] == ')') /* shortcut */
10184 else if (check_modifier (physname
, len
, " const"))
10185 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
10186 else if (check_modifier (physname
, len
, " volatile"))
10187 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
10194 /* The list is no longer needed. */
10195 cu
->method_list
.clear ();
10198 /* Go objects should be embedded in a DW_TAG_module DIE,
10199 and it's not clear if/how imported objects will appear.
10200 To keep Go support simple until that's worked out,
10201 go back through what we've read and create something usable.
10202 We could do this while processing each DIE, and feels kinda cleaner,
10203 but that way is more invasive.
10204 This is to, for example, allow the user to type "p var" or "b main"
10205 without having to specify the package name, and allow lookups
10206 of module.object to work in contexts that use the expression
10210 fixup_go_packaging (struct dwarf2_cu
*cu
)
10212 char *package_name
= NULL
;
10213 struct pending
*list
;
10216 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
10218 for (i
= 0; i
< list
->nsyms
; ++i
)
10220 struct symbol
*sym
= list
->symbol
[i
];
10222 if (SYMBOL_LANGUAGE (sym
) == language_go
10223 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
10225 char *this_package_name
= go_symbol_package_name (sym
);
10227 if (this_package_name
== NULL
)
10229 if (package_name
== NULL
)
10230 package_name
= this_package_name
;
10233 struct objfile
*objfile
10234 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10235 if (strcmp (package_name
, this_package_name
) != 0)
10236 complaint (&symfile_complaints
,
10237 _("Symtab %s has objects from two different Go packages: %s and %s"),
10238 (symbol_symtab (sym
) != NULL
10239 ? symtab_to_filename_for_display
10240 (symbol_symtab (sym
))
10241 : objfile_name (objfile
)),
10242 this_package_name
, package_name
);
10243 xfree (this_package_name
);
10249 if (package_name
!= NULL
)
10251 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10252 const char *saved_package_name
10253 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10255 strlen (package_name
));
10256 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
10257 saved_package_name
);
10258 struct symbol
*sym
;
10260 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
10262 sym
= allocate_symbol (objfile
);
10263 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
10264 SYMBOL_SET_NAMES (sym
, saved_package_name
,
10265 strlen (saved_package_name
), 0, objfile
);
10266 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
10267 e.g., "main" finds the "main" module and not C's main(). */
10268 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
10269 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
10270 SYMBOL_TYPE (sym
) = type
;
10272 add_symbol_to_list (sym
, &global_symbols
);
10274 xfree (package_name
);
10278 /* Return the symtab for PER_CU. This works properly regardless of
10279 whether we're using the index or psymtabs. */
10281 static struct compunit_symtab
*
10282 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10284 return (per_cu
->dwarf2_per_objfile
->using_index
10285 ? per_cu
->v
.quick
->compunit_symtab
10286 : per_cu
->v
.psymtab
->compunit_symtab
);
10289 /* A helper function for computing the list of all symbol tables
10290 included by PER_CU. */
10293 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10294 htab_t all_children
, htab_t all_type_symtabs
,
10295 struct dwarf2_per_cu_data
*per_cu
,
10296 struct compunit_symtab
*immediate_parent
)
10300 struct compunit_symtab
*cust
;
10301 struct dwarf2_per_cu_data
*iter
;
10303 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10306 /* This inclusion and its children have been processed. */
10311 /* Only add a CU if it has a symbol table. */
10312 cust
= get_compunit_symtab (per_cu
);
10315 /* If this is a type unit only add its symbol table if we haven't
10316 seen it yet (type unit per_cu's can share symtabs). */
10317 if (per_cu
->is_debug_types
)
10319 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10323 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10324 if (cust
->user
== NULL
)
10325 cust
->user
= immediate_parent
;
10330 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10331 if (cust
->user
== NULL
)
10332 cust
->user
= immediate_parent
;
10337 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10340 recursively_compute_inclusions (result
, all_children
,
10341 all_type_symtabs
, iter
, cust
);
10345 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10349 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10351 gdb_assert (! per_cu
->is_debug_types
);
10353 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10356 struct dwarf2_per_cu_data
*per_cu_iter
;
10357 struct compunit_symtab
*compunit_symtab_iter
;
10358 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10359 htab_t all_children
, all_type_symtabs
;
10360 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10362 /* If we don't have a symtab, we can just skip this case. */
10366 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10367 NULL
, xcalloc
, xfree
);
10368 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10369 NULL
, xcalloc
, xfree
);
10372 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10376 recursively_compute_inclusions (&result_symtabs
, all_children
,
10377 all_type_symtabs
, per_cu_iter
,
10381 /* Now we have a transitive closure of all the included symtabs. */
10382 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10384 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10385 struct compunit_symtab
*, len
+ 1);
10387 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10388 compunit_symtab_iter
);
10390 cust
->includes
[ix
] = compunit_symtab_iter
;
10391 cust
->includes
[len
] = NULL
;
10393 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10394 htab_delete (all_children
);
10395 htab_delete (all_type_symtabs
);
10399 /* Compute the 'includes' field for the symtabs of all the CUs we just
10403 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10406 struct dwarf2_per_cu_data
*iter
;
10409 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10413 if (! iter
->is_debug_types
)
10414 compute_compunit_symtab_includes (iter
);
10417 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10420 /* Generate full symbol information for PER_CU, whose DIEs have
10421 already been loaded into memory. */
10424 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10425 enum language pretend_language
)
10427 struct dwarf2_cu
*cu
= per_cu
->cu
;
10428 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10429 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10430 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10431 CORE_ADDR lowpc
, highpc
;
10432 struct compunit_symtab
*cust
;
10433 CORE_ADDR baseaddr
;
10434 struct block
*static_block
;
10437 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10440 scoped_free_pendings free_pending
;
10442 /* Clear the list here in case something was left over. */
10443 cu
->method_list
.clear ();
10445 cu
->list_in_scope
= &file_symbols
;
10447 cu
->language
= pretend_language
;
10448 cu
->language_defn
= language_def (cu
->language
);
10450 /* Do line number decoding in read_file_scope () */
10451 process_die (cu
->dies
, cu
);
10453 /* For now fudge the Go package. */
10454 if (cu
->language
== language_go
)
10455 fixup_go_packaging (cu
);
10457 /* Now that we have processed all the DIEs in the CU, all the types
10458 should be complete, and it should now be safe to compute all of the
10460 compute_delayed_physnames (cu
);
10462 /* Some compilers don't define a DW_AT_high_pc attribute for the
10463 compilation unit. If the DW_AT_high_pc is missing, synthesize
10464 it, by scanning the DIE's below the compilation unit. */
10465 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10467 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10468 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10470 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10471 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10472 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10473 addrmap to help ensure it has an accurate map of pc values belonging to
10475 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10477 cust
= end_symtab_from_static_block (static_block
,
10478 SECT_OFF_TEXT (objfile
), 0);
10482 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10484 /* Set symtab language to language from DW_AT_language. If the
10485 compilation is from a C file generated by language preprocessors, do
10486 not set the language if it was already deduced by start_subfile. */
10487 if (!(cu
->language
== language_c
10488 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10489 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10491 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10492 produce DW_AT_location with location lists but it can be possibly
10493 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10494 there were bugs in prologue debug info, fixed later in GCC-4.5
10495 by "unwind info for epilogues" patch (which is not directly related).
10497 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10498 needed, it would be wrong due to missing DW_AT_producer there.
10500 Still one can confuse GDB by using non-standard GCC compilation
10501 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10503 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10504 cust
->locations_valid
= 1;
10506 if (gcc_4_minor
>= 5)
10507 cust
->epilogue_unwind_valid
= 1;
10509 cust
->call_site_htab
= cu
->call_site_htab
;
10512 if (dwarf2_per_objfile
->using_index
)
10513 per_cu
->v
.quick
->compunit_symtab
= cust
;
10516 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10517 pst
->compunit_symtab
= cust
;
10521 /* Push it for inclusion processing later. */
10522 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10525 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10526 already been loaded into memory. */
10529 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10530 enum language pretend_language
)
10532 struct dwarf2_cu
*cu
= per_cu
->cu
;
10533 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10534 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10535 struct compunit_symtab
*cust
;
10536 struct signatured_type
*sig_type
;
10538 gdb_assert (per_cu
->is_debug_types
);
10539 sig_type
= (struct signatured_type
*) per_cu
;
10542 scoped_free_pendings free_pending
;
10544 /* Clear the list here in case something was left over. */
10545 cu
->method_list
.clear ();
10547 cu
->list_in_scope
= &file_symbols
;
10549 cu
->language
= pretend_language
;
10550 cu
->language_defn
= language_def (cu
->language
);
10552 /* The symbol tables are set up in read_type_unit_scope. */
10553 process_die (cu
->dies
, cu
);
10555 /* For now fudge the Go package. */
10556 if (cu
->language
== language_go
)
10557 fixup_go_packaging (cu
);
10559 /* Now that we have processed all the DIEs in the CU, all the types
10560 should be complete, and it should now be safe to compute all of the
10562 compute_delayed_physnames (cu
);
10564 /* TUs share symbol tables.
10565 If this is the first TU to use this symtab, complete the construction
10566 of it with end_expandable_symtab. Otherwise, complete the addition of
10567 this TU's symbols to the existing symtab. */
10568 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10570 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10571 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10575 /* Set symtab language to language from DW_AT_language. If the
10576 compilation is from a C file generated by language preprocessors,
10577 do not set the language if it was already deduced by
10579 if (!(cu
->language
== language_c
10580 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10581 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10586 augment_type_symtab ();
10587 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10590 if (dwarf2_per_objfile
->using_index
)
10591 per_cu
->v
.quick
->compunit_symtab
= cust
;
10594 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10595 pst
->compunit_symtab
= cust
;
10600 /* Process an imported unit DIE. */
10603 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10605 struct attribute
*attr
;
10607 /* For now we don't handle imported units in type units. */
10608 if (cu
->per_cu
->is_debug_types
)
10610 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10611 " supported in type units [in module %s]"),
10612 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10615 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10618 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10619 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10620 dwarf2_per_cu_data
*per_cu
10621 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10622 cu
->per_cu
->dwarf2_per_objfile
);
10624 /* If necessary, add it to the queue and load its DIEs. */
10625 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10626 load_full_comp_unit (per_cu
, cu
->language
);
10628 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10633 /* RAII object that represents a process_die scope: i.e.,
10634 starts/finishes processing a DIE. */
10635 class process_die_scope
10638 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10639 : m_die (die
), m_cu (cu
)
10641 /* We should only be processing DIEs not already in process. */
10642 gdb_assert (!m_die
->in_process
);
10643 m_die
->in_process
= true;
10646 ~process_die_scope ()
10648 m_die
->in_process
= false;
10650 /* If we're done processing the DIE for the CU that owns the line
10651 header, we don't need the line header anymore. */
10652 if (m_cu
->line_header_die_owner
== m_die
)
10654 delete m_cu
->line_header
;
10655 m_cu
->line_header
= NULL
;
10656 m_cu
->line_header_die_owner
= NULL
;
10665 /* Process a die and its children. */
10668 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10670 process_die_scope
scope (die
, cu
);
10674 case DW_TAG_padding
:
10676 case DW_TAG_compile_unit
:
10677 case DW_TAG_partial_unit
:
10678 read_file_scope (die
, cu
);
10680 case DW_TAG_type_unit
:
10681 read_type_unit_scope (die
, cu
);
10683 case DW_TAG_subprogram
:
10684 case DW_TAG_inlined_subroutine
:
10685 read_func_scope (die
, cu
);
10687 case DW_TAG_lexical_block
:
10688 case DW_TAG_try_block
:
10689 case DW_TAG_catch_block
:
10690 read_lexical_block_scope (die
, cu
);
10692 case DW_TAG_call_site
:
10693 case DW_TAG_GNU_call_site
:
10694 read_call_site_scope (die
, cu
);
10696 case DW_TAG_class_type
:
10697 case DW_TAG_interface_type
:
10698 case DW_TAG_structure_type
:
10699 case DW_TAG_union_type
:
10700 process_structure_scope (die
, cu
);
10702 case DW_TAG_enumeration_type
:
10703 process_enumeration_scope (die
, cu
);
10706 /* These dies have a type, but processing them does not create
10707 a symbol or recurse to process the children. Therefore we can
10708 read them on-demand through read_type_die. */
10709 case DW_TAG_subroutine_type
:
10710 case DW_TAG_set_type
:
10711 case DW_TAG_array_type
:
10712 case DW_TAG_pointer_type
:
10713 case DW_TAG_ptr_to_member_type
:
10714 case DW_TAG_reference_type
:
10715 case DW_TAG_rvalue_reference_type
:
10716 case DW_TAG_string_type
:
10719 case DW_TAG_base_type
:
10720 case DW_TAG_subrange_type
:
10721 case DW_TAG_typedef
:
10722 /* Add a typedef symbol for the type definition, if it has a
10724 new_symbol (die
, read_type_die (die
, cu
), cu
);
10726 case DW_TAG_common_block
:
10727 read_common_block (die
, cu
);
10729 case DW_TAG_common_inclusion
:
10731 case DW_TAG_namespace
:
10732 cu
->processing_has_namespace_info
= 1;
10733 read_namespace (die
, cu
);
10735 case DW_TAG_module
:
10736 cu
->processing_has_namespace_info
= 1;
10737 read_module (die
, cu
);
10739 case DW_TAG_imported_declaration
:
10740 cu
->processing_has_namespace_info
= 1;
10741 if (read_namespace_alias (die
, cu
))
10743 /* The declaration is not a global namespace alias: fall through. */
10744 case DW_TAG_imported_module
:
10745 cu
->processing_has_namespace_info
= 1;
10746 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10747 || cu
->language
!= language_fortran
))
10748 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10749 dwarf_tag_name (die
->tag
));
10750 read_import_statement (die
, cu
);
10753 case DW_TAG_imported_unit
:
10754 process_imported_unit_die (die
, cu
);
10757 case DW_TAG_variable
:
10758 read_variable (die
, cu
);
10762 new_symbol (die
, NULL
, cu
);
10767 /* DWARF name computation. */
10769 /* A helper function for dwarf2_compute_name which determines whether DIE
10770 needs to have the name of the scope prepended to the name listed in the
10774 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10776 struct attribute
*attr
;
10780 case DW_TAG_namespace
:
10781 case DW_TAG_typedef
:
10782 case DW_TAG_class_type
:
10783 case DW_TAG_interface_type
:
10784 case DW_TAG_structure_type
:
10785 case DW_TAG_union_type
:
10786 case DW_TAG_enumeration_type
:
10787 case DW_TAG_enumerator
:
10788 case DW_TAG_subprogram
:
10789 case DW_TAG_inlined_subroutine
:
10790 case DW_TAG_member
:
10791 case DW_TAG_imported_declaration
:
10794 case DW_TAG_variable
:
10795 case DW_TAG_constant
:
10796 /* We only need to prefix "globally" visible variables. These include
10797 any variable marked with DW_AT_external or any variable that
10798 lives in a namespace. [Variables in anonymous namespaces
10799 require prefixing, but they are not DW_AT_external.] */
10801 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10803 struct dwarf2_cu
*spec_cu
= cu
;
10805 return die_needs_namespace (die_specification (die
, &spec_cu
),
10809 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10810 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10811 && die
->parent
->tag
!= DW_TAG_module
)
10813 /* A variable in a lexical block of some kind does not need a
10814 namespace, even though in C++ such variables may be external
10815 and have a mangled name. */
10816 if (die
->parent
->tag
== DW_TAG_lexical_block
10817 || die
->parent
->tag
== DW_TAG_try_block
10818 || die
->parent
->tag
== DW_TAG_catch_block
10819 || die
->parent
->tag
== DW_TAG_subprogram
)
10828 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10829 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10830 defined for the given DIE. */
10832 static struct attribute
*
10833 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10835 struct attribute
*attr
;
10837 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10839 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10844 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10845 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10846 defined for the given DIE. */
10848 static const char *
10849 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10851 const char *linkage_name
;
10853 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10854 if (linkage_name
== NULL
)
10855 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10857 return linkage_name
;
10860 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10861 compute the physname for the object, which include a method's:
10862 - formal parameters (C++),
10863 - receiver type (Go),
10865 The term "physname" is a bit confusing.
10866 For C++, for example, it is the demangled name.
10867 For Go, for example, it's the mangled name.
10869 For Ada, return the DIE's linkage name rather than the fully qualified
10870 name. PHYSNAME is ignored..
10872 The result is allocated on the objfile_obstack and canonicalized. */
10874 static const char *
10875 dwarf2_compute_name (const char *name
,
10876 struct die_info
*die
, struct dwarf2_cu
*cu
,
10879 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10882 name
= dwarf2_name (die
, cu
);
10884 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10885 but otherwise compute it by typename_concat inside GDB.
10886 FIXME: Actually this is not really true, or at least not always true.
10887 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10888 Fortran names because there is no mangling standard. So new_symbol
10889 will set the demangled name to the result of dwarf2_full_name, and it is
10890 the demangled name that GDB uses if it exists. */
10891 if (cu
->language
== language_ada
10892 || (cu
->language
== language_fortran
&& physname
))
10894 /* For Ada unit, we prefer the linkage name over the name, as
10895 the former contains the exported name, which the user expects
10896 to be able to reference. Ideally, we want the user to be able
10897 to reference this entity using either natural or linkage name,
10898 but we haven't started looking at this enhancement yet. */
10899 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10901 if (linkage_name
!= NULL
)
10902 return linkage_name
;
10905 /* These are the only languages we know how to qualify names in. */
10907 && (cu
->language
== language_cplus
10908 || cu
->language
== language_fortran
|| cu
->language
== language_d
10909 || cu
->language
== language_rust
))
10911 if (die_needs_namespace (die
, cu
))
10913 const char *prefix
;
10914 const char *canonical_name
= NULL
;
10918 prefix
= determine_prefix (die
, cu
);
10919 if (*prefix
!= '\0')
10921 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10924 buf
.puts (prefixed_name
);
10925 xfree (prefixed_name
);
10930 /* Template parameters may be specified in the DIE's DW_AT_name, or
10931 as children with DW_TAG_template_type_param or
10932 DW_TAG_value_type_param. If the latter, add them to the name
10933 here. If the name already has template parameters, then
10934 skip this step; some versions of GCC emit both, and
10935 it is more efficient to use the pre-computed name.
10937 Something to keep in mind about this process: it is very
10938 unlikely, or in some cases downright impossible, to produce
10939 something that will match the mangled name of a function.
10940 If the definition of the function has the same debug info,
10941 we should be able to match up with it anyway. But fallbacks
10942 using the minimal symbol, for instance to find a method
10943 implemented in a stripped copy of libstdc++, will not work.
10944 If we do not have debug info for the definition, we will have to
10945 match them up some other way.
10947 When we do name matching there is a related problem with function
10948 templates; two instantiated function templates are allowed to
10949 differ only by their return types, which we do not add here. */
10951 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10953 struct attribute
*attr
;
10954 struct die_info
*child
;
10957 die
->building_fullname
= 1;
10959 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10963 const gdb_byte
*bytes
;
10964 struct dwarf2_locexpr_baton
*baton
;
10967 if (child
->tag
!= DW_TAG_template_type_param
10968 && child
->tag
!= DW_TAG_template_value_param
)
10979 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10982 complaint (&symfile_complaints
,
10983 _("template parameter missing DW_AT_type"));
10984 buf
.puts ("UNKNOWN_TYPE");
10987 type
= die_type (child
, cu
);
10989 if (child
->tag
== DW_TAG_template_type_param
)
10991 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10995 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10998 complaint (&symfile_complaints
,
10999 _("template parameter missing "
11000 "DW_AT_const_value"));
11001 buf
.puts ("UNKNOWN_VALUE");
11005 dwarf2_const_value_attr (attr
, type
, name
,
11006 &cu
->comp_unit_obstack
, cu
,
11007 &value
, &bytes
, &baton
);
11009 if (TYPE_NOSIGN (type
))
11010 /* GDB prints characters as NUMBER 'CHAR'. If that's
11011 changed, this can use value_print instead. */
11012 c_printchar (value
, type
, &buf
);
11015 struct value_print_options opts
;
11018 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
11022 else if (bytes
!= NULL
)
11024 v
= allocate_value (type
);
11025 memcpy (value_contents_writeable (v
), bytes
,
11026 TYPE_LENGTH (type
));
11029 v
= value_from_longest (type
, value
);
11031 /* Specify decimal so that we do not depend on
11033 get_formatted_print_options (&opts
, 'd');
11035 value_print (v
, &buf
, &opts
);
11041 die
->building_fullname
= 0;
11045 /* Close the argument list, with a space if necessary
11046 (nested templates). */
11047 if (!buf
.empty () && buf
.string ().back () == '>')
11054 /* For C++ methods, append formal parameter type
11055 information, if PHYSNAME. */
11057 if (physname
&& die
->tag
== DW_TAG_subprogram
11058 && cu
->language
== language_cplus
)
11060 struct type
*type
= read_type_die (die
, cu
);
11062 c_type_print_args (type
, &buf
, 1, cu
->language
,
11063 &type_print_raw_options
);
11065 if (cu
->language
== language_cplus
)
11067 /* Assume that an artificial first parameter is
11068 "this", but do not crash if it is not. RealView
11069 marks unnamed (and thus unused) parameters as
11070 artificial; there is no way to differentiate
11072 if (TYPE_NFIELDS (type
) > 0
11073 && TYPE_FIELD_ARTIFICIAL (type
, 0)
11074 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
11075 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
11077 buf
.puts (" const");
11081 const std::string
&intermediate_name
= buf
.string ();
11083 if (cu
->language
== language_cplus
)
11085 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
11086 &objfile
->per_bfd
->storage_obstack
);
11088 /* If we only computed INTERMEDIATE_NAME, or if
11089 INTERMEDIATE_NAME is already canonical, then we need to
11090 copy it to the appropriate obstack. */
11091 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11092 name
= ((const char *)
11093 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11094 intermediate_name
.c_str (),
11095 intermediate_name
.length ()));
11097 name
= canonical_name
;
11104 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11105 If scope qualifiers are appropriate they will be added. The result
11106 will be allocated on the storage_obstack, or NULL if the DIE does
11107 not have a name. NAME may either be from a previous call to
11108 dwarf2_name or NULL.
11110 The output string will be canonicalized (if C++). */
11112 static const char *
11113 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11115 return dwarf2_compute_name (name
, die
, cu
, 0);
11118 /* Construct a physname for the given DIE in CU. NAME may either be
11119 from a previous call to dwarf2_name or NULL. The result will be
11120 allocated on the objfile_objstack or NULL if the DIE does not have a
11123 The output string will be canonicalized (if C++). */
11125 static const char *
11126 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11128 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11129 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11132 /* In this case dwarf2_compute_name is just a shortcut not building anything
11134 if (!die_needs_namespace (die
, cu
))
11135 return dwarf2_compute_name (name
, die
, cu
, 1);
11137 mangled
= dw2_linkage_name (die
, cu
);
11139 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11140 See https://github.com/rust-lang/rust/issues/32925. */
11141 if (cu
->language
== language_rust
&& mangled
!= NULL
11142 && strchr (mangled
, '{') != NULL
)
11145 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11147 gdb::unique_xmalloc_ptr
<char> demangled
;
11148 if (mangled
!= NULL
)
11151 if (cu
->language
== language_go
)
11153 /* This is a lie, but we already lie to the caller new_symbol.
11154 new_symbol assumes we return the mangled name.
11155 This just undoes that lie until things are cleaned up. */
11159 /* Use DMGL_RET_DROP for C++ template functions to suppress
11160 their return type. It is easier for GDB users to search
11161 for such functions as `name(params)' than `long name(params)'.
11162 In such case the minimal symbol names do not match the full
11163 symbol names but for template functions there is never a need
11164 to look up their definition from their declaration so
11165 the only disadvantage remains the minimal symbol variant
11166 `long name(params)' does not have the proper inferior type. */
11167 demangled
.reset (gdb_demangle (mangled
,
11168 (DMGL_PARAMS
| DMGL_ANSI
11169 | DMGL_RET_DROP
)));
11172 canon
= demangled
.get ();
11180 if (canon
== NULL
|| check_physname
)
11182 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11184 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11186 /* It may not mean a bug in GDB. The compiler could also
11187 compute DW_AT_linkage_name incorrectly. But in such case
11188 GDB would need to be bug-to-bug compatible. */
11190 complaint (&symfile_complaints
,
11191 _("Computed physname <%s> does not match demangled <%s> "
11192 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
11193 physname
, canon
, mangled
, to_underlying (die
->sect_off
),
11194 objfile_name (objfile
));
11196 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11197 is available here - over computed PHYSNAME. It is safer
11198 against both buggy GDB and buggy compilers. */
11212 retval
= ((const char *)
11213 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11214 retval
, strlen (retval
)));
11219 /* Inspect DIE in CU for a namespace alias. If one exists, record
11220 a new symbol for it.
11222 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11225 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11227 struct attribute
*attr
;
11229 /* If the die does not have a name, this is not a namespace
11231 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11235 struct die_info
*d
= die
;
11236 struct dwarf2_cu
*imported_cu
= cu
;
11238 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11239 keep inspecting DIEs until we hit the underlying import. */
11240 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11241 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11243 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11247 d
= follow_die_ref (d
, attr
, &imported_cu
);
11248 if (d
->tag
!= DW_TAG_imported_declaration
)
11252 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11254 complaint (&symfile_complaints
,
11255 _("DIE at 0x%x has too many recursively imported "
11256 "declarations"), to_underlying (d
->sect_off
));
11263 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11265 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11266 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11268 /* This declaration is a global namespace alias. Add
11269 a symbol for it whose type is the aliased namespace. */
11270 new_symbol (die
, type
, cu
);
11279 /* Return the using directives repository (global or local?) to use in the
11280 current context for LANGUAGE.
11282 For Ada, imported declarations can materialize renamings, which *may* be
11283 global. However it is impossible (for now?) in DWARF to distinguish
11284 "external" imported declarations and "static" ones. As all imported
11285 declarations seem to be static in all other languages, make them all CU-wide
11286 global only in Ada. */
11288 static struct using_direct
**
11289 using_directives (enum language language
)
11291 if (language
== language_ada
&& context_stack_depth
== 0)
11292 return &global_using_directives
;
11294 return &local_using_directives
;
11297 /* Read the import statement specified by the given die and record it. */
11300 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11302 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11303 struct attribute
*import_attr
;
11304 struct die_info
*imported_die
, *child_die
;
11305 struct dwarf2_cu
*imported_cu
;
11306 const char *imported_name
;
11307 const char *imported_name_prefix
;
11308 const char *canonical_name
;
11309 const char *import_alias
;
11310 const char *imported_declaration
= NULL
;
11311 const char *import_prefix
;
11312 std::vector
<const char *> excludes
;
11314 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11315 if (import_attr
== NULL
)
11317 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11318 dwarf_tag_name (die
->tag
));
11323 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11324 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11325 if (imported_name
== NULL
)
11327 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11329 The import in the following code:
11343 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11344 <52> DW_AT_decl_file : 1
11345 <53> DW_AT_decl_line : 6
11346 <54> DW_AT_import : <0x75>
11347 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11348 <59> DW_AT_name : B
11349 <5b> DW_AT_decl_file : 1
11350 <5c> DW_AT_decl_line : 2
11351 <5d> DW_AT_type : <0x6e>
11353 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11354 <76> DW_AT_byte_size : 4
11355 <77> DW_AT_encoding : 5 (signed)
11357 imports the wrong die ( 0x75 instead of 0x58 ).
11358 This case will be ignored until the gcc bug is fixed. */
11362 /* Figure out the local name after import. */
11363 import_alias
= dwarf2_name (die
, cu
);
11365 /* Figure out where the statement is being imported to. */
11366 import_prefix
= determine_prefix (die
, cu
);
11368 /* Figure out what the scope of the imported die is and prepend it
11369 to the name of the imported die. */
11370 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11372 if (imported_die
->tag
!= DW_TAG_namespace
11373 && imported_die
->tag
!= DW_TAG_module
)
11375 imported_declaration
= imported_name
;
11376 canonical_name
= imported_name_prefix
;
11378 else if (strlen (imported_name_prefix
) > 0)
11379 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11380 imported_name_prefix
,
11381 (cu
->language
== language_d
? "." : "::"),
11382 imported_name
, (char *) NULL
);
11384 canonical_name
= imported_name
;
11386 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11387 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11388 child_die
= sibling_die (child_die
))
11390 /* DWARF-4: A Fortran use statement with a “rename list” may be
11391 represented by an imported module entry with an import attribute
11392 referring to the module and owned entries corresponding to those
11393 entities that are renamed as part of being imported. */
11395 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11397 complaint (&symfile_complaints
,
11398 _("child DW_TAG_imported_declaration expected "
11399 "- DIE at 0x%x [in module %s]"),
11400 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
11404 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11405 if (import_attr
== NULL
)
11407 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11408 dwarf_tag_name (child_die
->tag
));
11413 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11415 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11416 if (imported_name
== NULL
)
11418 complaint (&symfile_complaints
,
11419 _("child DW_TAG_imported_declaration has unknown "
11420 "imported name - DIE at 0x%x [in module %s]"),
11421 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
11425 excludes
.push_back (imported_name
);
11427 process_die (child_die
, cu
);
11430 add_using_directive (using_directives (cu
->language
),
11434 imported_declaration
,
11437 &objfile
->objfile_obstack
);
11440 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11441 types, but gives them a size of zero. Starting with version 14,
11442 ICC is compatible with GCC. */
11445 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11447 if (!cu
->checked_producer
)
11448 check_producer (cu
);
11450 return cu
->producer_is_icc_lt_14
;
11453 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11454 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11455 this, it was first present in GCC release 4.3.0. */
11458 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11460 if (!cu
->checked_producer
)
11461 check_producer (cu
);
11463 return cu
->producer_is_gcc_lt_4_3
;
11466 static file_and_directory
11467 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11469 file_and_directory res
;
11471 /* Find the filename. Do not use dwarf2_name here, since the filename
11472 is not a source language identifier. */
11473 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11474 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11476 if (res
.comp_dir
== NULL
11477 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11478 && IS_ABSOLUTE_PATH (res
.name
))
11480 res
.comp_dir_storage
= ldirname (res
.name
);
11481 if (!res
.comp_dir_storage
.empty ())
11482 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11484 if (res
.comp_dir
!= NULL
)
11486 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11487 directory, get rid of it. */
11488 const char *cp
= strchr (res
.comp_dir
, ':');
11490 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11491 res
.comp_dir
= cp
+ 1;
11494 if (res
.name
== NULL
)
11495 res
.name
= "<unknown>";
11500 /* Handle DW_AT_stmt_list for a compilation unit.
11501 DIE is the DW_TAG_compile_unit die for CU.
11502 COMP_DIR is the compilation directory. LOWPC is passed to
11503 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11506 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11507 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11509 struct dwarf2_per_objfile
*dwarf2_per_objfile
11510 = cu
->per_cu
->dwarf2_per_objfile
;
11511 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11512 struct attribute
*attr
;
11513 struct line_header line_header_local
;
11514 hashval_t line_header_local_hash
;
11516 int decode_mapping
;
11518 gdb_assert (! cu
->per_cu
->is_debug_types
);
11520 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11524 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11526 /* The line header hash table is only created if needed (it exists to
11527 prevent redundant reading of the line table for partial_units).
11528 If we're given a partial_unit, we'll need it. If we're given a
11529 compile_unit, then use the line header hash table if it's already
11530 created, but don't create one just yet. */
11532 if (dwarf2_per_objfile
->line_header_hash
== NULL
11533 && die
->tag
== DW_TAG_partial_unit
)
11535 dwarf2_per_objfile
->line_header_hash
11536 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11537 line_header_eq_voidp
,
11538 free_line_header_voidp
,
11539 &objfile
->objfile_obstack
,
11540 hashtab_obstack_allocate
,
11541 dummy_obstack_deallocate
);
11544 line_header_local
.sect_off
= line_offset
;
11545 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11546 line_header_local_hash
= line_header_hash (&line_header_local
);
11547 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11549 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11550 &line_header_local
,
11551 line_header_local_hash
, NO_INSERT
);
11553 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11554 is not present in *SLOT (since if there is something in *SLOT then
11555 it will be for a partial_unit). */
11556 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11558 gdb_assert (*slot
!= NULL
);
11559 cu
->line_header
= (struct line_header
*) *slot
;
11564 /* dwarf_decode_line_header does not yet provide sufficient information.
11565 We always have to call also dwarf_decode_lines for it. */
11566 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11570 cu
->line_header
= lh
.release ();
11571 cu
->line_header_die_owner
= die
;
11573 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11577 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11578 &line_header_local
,
11579 line_header_local_hash
, INSERT
);
11580 gdb_assert (slot
!= NULL
);
11582 if (slot
!= NULL
&& *slot
== NULL
)
11584 /* This newly decoded line number information unit will be owned
11585 by line_header_hash hash table. */
11586 *slot
= cu
->line_header
;
11587 cu
->line_header_die_owner
= NULL
;
11591 /* We cannot free any current entry in (*slot) as that struct line_header
11592 may be already used by multiple CUs. Create only temporary decoded
11593 line_header for this CU - it may happen at most once for each line
11594 number information unit. And if we're not using line_header_hash
11595 then this is what we want as well. */
11596 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11598 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11599 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11604 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11607 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11609 struct dwarf2_per_objfile
*dwarf2_per_objfile
11610 = cu
->per_cu
->dwarf2_per_objfile
;
11611 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11612 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11613 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11614 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11615 struct attribute
*attr
;
11616 struct die_info
*child_die
;
11617 CORE_ADDR baseaddr
;
11619 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11621 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11623 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11624 from finish_block. */
11625 if (lowpc
== ((CORE_ADDR
) -1))
11627 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11629 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11631 prepare_one_comp_unit (cu
, die
, cu
->language
);
11633 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11634 standardised yet. As a workaround for the language detection we fall
11635 back to the DW_AT_producer string. */
11636 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11637 cu
->language
= language_opencl
;
11639 /* Similar hack for Go. */
11640 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11641 set_cu_language (DW_LANG_Go
, cu
);
11643 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11645 /* Decode line number information if present. We do this before
11646 processing child DIEs, so that the line header table is available
11647 for DW_AT_decl_file. */
11648 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11650 /* Process all dies in compilation unit. */
11651 if (die
->child
!= NULL
)
11653 child_die
= die
->child
;
11654 while (child_die
&& child_die
->tag
)
11656 process_die (child_die
, cu
);
11657 child_die
= sibling_die (child_die
);
11661 /* Decode macro information, if present. Dwarf 2 macro information
11662 refers to information in the line number info statement program
11663 header, so we can only read it if we've read the header
11665 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11667 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11668 if (attr
&& cu
->line_header
)
11670 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11671 complaint (&symfile_complaints
,
11672 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11674 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11678 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11679 if (attr
&& cu
->line_header
)
11681 unsigned int macro_offset
= DW_UNSND (attr
);
11683 dwarf_decode_macros (cu
, macro_offset
, 0);
11688 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11689 Create the set of symtabs used by this TU, or if this TU is sharing
11690 symtabs with another TU and the symtabs have already been created
11691 then restore those symtabs in the line header.
11692 We don't need the pc/line-number mapping for type units. */
11695 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11697 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11698 struct type_unit_group
*tu_group
;
11700 struct attribute
*attr
;
11702 struct signatured_type
*sig_type
;
11704 gdb_assert (per_cu
->is_debug_types
);
11705 sig_type
= (struct signatured_type
*) per_cu
;
11707 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11709 /* If we're using .gdb_index (includes -readnow) then
11710 per_cu->type_unit_group may not have been set up yet. */
11711 if (sig_type
->type_unit_group
== NULL
)
11712 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11713 tu_group
= sig_type
->type_unit_group
;
11715 /* If we've already processed this stmt_list there's no real need to
11716 do it again, we could fake it and just recreate the part we need
11717 (file name,index -> symtab mapping). If data shows this optimization
11718 is useful we can do it then. */
11719 first_time
= tu_group
->compunit_symtab
== NULL
;
11721 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11726 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11727 lh
= dwarf_decode_line_header (line_offset
, cu
);
11732 dwarf2_start_symtab (cu
, "", NULL
, 0);
11735 gdb_assert (tu_group
->symtabs
== NULL
);
11736 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11741 cu
->line_header
= lh
.release ();
11742 cu
->line_header_die_owner
= die
;
11746 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11748 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11749 still initializing it, and our caller (a few levels up)
11750 process_full_type_unit still needs to know if this is the first
11753 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11754 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11755 cu
->line_header
->file_names
.size ());
11757 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11759 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11761 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11763 if (current_subfile
->symtab
== NULL
)
11765 /* NOTE: start_subfile will recognize when it's been
11766 passed a file it has already seen. So we can't
11767 assume there's a simple mapping from
11768 cu->line_header->file_names to subfiles, plus
11769 cu->line_header->file_names may contain dups. */
11770 current_subfile
->symtab
11771 = allocate_symtab (cust
, current_subfile
->name
);
11774 fe
.symtab
= current_subfile
->symtab
;
11775 tu_group
->symtabs
[i
] = fe
.symtab
;
11780 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11782 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11784 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11786 fe
.symtab
= tu_group
->symtabs
[i
];
11790 /* The main symtab is allocated last. Type units don't have DW_AT_name
11791 so they don't have a "real" (so to speak) symtab anyway.
11792 There is later code that will assign the main symtab to all symbols
11793 that don't have one. We need to handle the case of a symbol with a
11794 missing symtab (DW_AT_decl_file) anyway. */
11797 /* Process DW_TAG_type_unit.
11798 For TUs we want to skip the first top level sibling if it's not the
11799 actual type being defined by this TU. In this case the first top
11800 level sibling is there to provide context only. */
11803 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11805 struct die_info
*child_die
;
11807 prepare_one_comp_unit (cu
, die
, language_minimal
);
11809 /* Initialize (or reinitialize) the machinery for building symtabs.
11810 We do this before processing child DIEs, so that the line header table
11811 is available for DW_AT_decl_file. */
11812 setup_type_unit_groups (die
, cu
);
11814 if (die
->child
!= NULL
)
11816 child_die
= die
->child
;
11817 while (child_die
&& child_die
->tag
)
11819 process_die (child_die
, cu
);
11820 child_die
= sibling_die (child_die
);
11827 http://gcc.gnu.org/wiki/DebugFission
11828 http://gcc.gnu.org/wiki/DebugFissionDWP
11830 To simplify handling of both DWO files ("object" files with the DWARF info)
11831 and DWP files (a file with the DWOs packaged up into one file), we treat
11832 DWP files as having a collection of virtual DWO files. */
11835 hash_dwo_file (const void *item
)
11837 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11840 hash
= htab_hash_string (dwo_file
->dwo_name
);
11841 if (dwo_file
->comp_dir
!= NULL
)
11842 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11847 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11849 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11850 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11852 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11854 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11855 return lhs
->comp_dir
== rhs
->comp_dir
;
11856 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11859 /* Allocate a hash table for DWO files. */
11862 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11864 return htab_create_alloc_ex (41,
11868 &objfile
->objfile_obstack
,
11869 hashtab_obstack_allocate
,
11870 dummy_obstack_deallocate
);
11873 /* Lookup DWO file DWO_NAME. */
11876 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11877 const char *dwo_name
,
11878 const char *comp_dir
)
11880 struct dwo_file find_entry
;
11883 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11884 dwarf2_per_objfile
->dwo_files
11885 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11887 memset (&find_entry
, 0, sizeof (find_entry
));
11888 find_entry
.dwo_name
= dwo_name
;
11889 find_entry
.comp_dir
= comp_dir
;
11890 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11896 hash_dwo_unit (const void *item
)
11898 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11900 /* This drops the top 32 bits of the id, but is ok for a hash. */
11901 return dwo_unit
->signature
;
11905 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11907 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11908 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11910 /* The signature is assumed to be unique within the DWO file.
11911 So while object file CU dwo_id's always have the value zero,
11912 that's OK, assuming each object file DWO file has only one CU,
11913 and that's the rule for now. */
11914 return lhs
->signature
== rhs
->signature
;
11917 /* Allocate a hash table for DWO CUs,TUs.
11918 There is one of these tables for each of CUs,TUs for each DWO file. */
11921 allocate_dwo_unit_table (struct objfile
*objfile
)
11923 /* Start out with a pretty small number.
11924 Generally DWO files contain only one CU and maybe some TUs. */
11925 return htab_create_alloc_ex (3,
11929 &objfile
->objfile_obstack
,
11930 hashtab_obstack_allocate
,
11931 dummy_obstack_deallocate
);
11934 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11936 struct create_dwo_cu_data
11938 struct dwo_file
*dwo_file
;
11939 struct dwo_unit dwo_unit
;
11942 /* die_reader_func for create_dwo_cu. */
11945 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11946 const gdb_byte
*info_ptr
,
11947 struct die_info
*comp_unit_die
,
11951 struct dwarf2_cu
*cu
= reader
->cu
;
11952 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11953 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11954 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11955 struct dwo_file
*dwo_file
= data
->dwo_file
;
11956 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11957 struct attribute
*attr
;
11959 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11962 complaint (&symfile_complaints
,
11963 _("Dwarf Error: debug entry at offset 0x%x is missing"
11964 " its dwo_id [in module %s]"),
11965 to_underlying (sect_off
), dwo_file
->dwo_name
);
11969 dwo_unit
->dwo_file
= dwo_file
;
11970 dwo_unit
->signature
= DW_UNSND (attr
);
11971 dwo_unit
->section
= section
;
11972 dwo_unit
->sect_off
= sect_off
;
11973 dwo_unit
->length
= cu
->per_cu
->length
;
11975 if (dwarf_read_debug
)
11976 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
11977 to_underlying (sect_off
),
11978 hex_string (dwo_unit
->signature
));
11981 /* Create the dwo_units for the CUs in a DWO_FILE.
11982 Note: This function processes DWO files only, not DWP files. */
11985 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11986 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11989 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11990 const gdb_byte
*info_ptr
, *end_ptr
;
11992 dwarf2_read_section (objfile
, §ion
);
11993 info_ptr
= section
.buffer
;
11995 if (info_ptr
== NULL
)
11998 if (dwarf_read_debug
)
12000 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
12001 get_section_name (§ion
),
12002 get_section_file_name (§ion
));
12005 end_ptr
= info_ptr
+ section
.size
;
12006 while (info_ptr
< end_ptr
)
12008 struct dwarf2_per_cu_data per_cu
;
12009 struct create_dwo_cu_data create_dwo_cu_data
;
12010 struct dwo_unit
*dwo_unit
;
12012 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
12014 memset (&create_dwo_cu_data
.dwo_unit
, 0,
12015 sizeof (create_dwo_cu_data
.dwo_unit
));
12016 memset (&per_cu
, 0, sizeof (per_cu
));
12017 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
12018 per_cu
.is_debug_types
= 0;
12019 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
12020 per_cu
.section
= §ion
;
12021 create_dwo_cu_data
.dwo_file
= &dwo_file
;
12023 init_cutu_and_read_dies_no_follow (
12024 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
12025 info_ptr
+= per_cu
.length
;
12027 // If the unit could not be parsed, skip it.
12028 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
12031 if (cus_htab
== NULL
)
12032 cus_htab
= allocate_dwo_unit_table (objfile
);
12034 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12035 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
12036 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
12037 gdb_assert (slot
!= NULL
);
12040 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
12041 sect_offset dup_sect_off
= dup_cu
->sect_off
;
12043 complaint (&symfile_complaints
,
12044 _("debug cu entry at offset 0x%x is duplicate to"
12045 " the entry at offset 0x%x, signature %s"),
12046 to_underlying (sect_off
), to_underlying (dup_sect_off
),
12047 hex_string (dwo_unit
->signature
));
12049 *slot
= (void *)dwo_unit
;
12053 /* DWP file .debug_{cu,tu}_index section format:
12054 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
12058 Both index sections have the same format, and serve to map a 64-bit
12059 signature to a set of section numbers. Each section begins with a header,
12060 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
12061 indexes, and a pool of 32-bit section numbers. The index sections will be
12062 aligned at 8-byte boundaries in the file.
12064 The index section header consists of:
12066 V, 32 bit version number
12068 N, 32 bit number of compilation units or type units in the index
12069 M, 32 bit number of slots in the hash table
12071 Numbers are recorded using the byte order of the application binary.
12073 The hash table begins at offset 16 in the section, and consists of an array
12074 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12075 order of the application binary). Unused slots in the hash table are 0.
12076 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12078 The parallel table begins immediately after the hash table
12079 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12080 array of 32-bit indexes (using the byte order of the application binary),
12081 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12082 table contains a 32-bit index into the pool of section numbers. For unused
12083 hash table slots, the corresponding entry in the parallel table will be 0.
12085 The pool of section numbers begins immediately following the hash table
12086 (at offset 16 + 12 * M from the beginning of the section). The pool of
12087 section numbers consists of an array of 32-bit words (using the byte order
12088 of the application binary). Each item in the array is indexed starting
12089 from 0. The hash table entry provides the index of the first section
12090 number in the set. Additional section numbers in the set follow, and the
12091 set is terminated by a 0 entry (section number 0 is not used in ELF).
12093 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12094 section must be the first entry in the set, and the .debug_abbrev.dwo must
12095 be the second entry. Other members of the set may follow in any order.
12101 DWP Version 2 combines all the .debug_info, etc. sections into one,
12102 and the entries in the index tables are now offsets into these sections.
12103 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12106 Index Section Contents:
12108 Hash Table of Signatures dwp_hash_table.hash_table
12109 Parallel Table of Indices dwp_hash_table.unit_table
12110 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12111 Table of Section Sizes dwp_hash_table.v2.sizes
12113 The index section header consists of:
12115 V, 32 bit version number
12116 L, 32 bit number of columns in the table of section offsets
12117 N, 32 bit number of compilation units or type units in the index
12118 M, 32 bit number of slots in the hash table
12120 Numbers are recorded using the byte order of the application binary.
12122 The hash table has the same format as version 1.
12123 The parallel table of indices has the same format as version 1,
12124 except that the entries are origin-1 indices into the table of sections
12125 offsets and the table of section sizes.
12127 The table of offsets begins immediately following the parallel table
12128 (at offset 16 + 12 * M from the beginning of the section). The table is
12129 a two-dimensional array of 32-bit words (using the byte order of the
12130 application binary), with L columns and N+1 rows, in row-major order.
12131 Each row in the array is indexed starting from 0. The first row provides
12132 a key to the remaining rows: each column in this row provides an identifier
12133 for a debug section, and the offsets in the same column of subsequent rows
12134 refer to that section. The section identifiers are:
12136 DW_SECT_INFO 1 .debug_info.dwo
12137 DW_SECT_TYPES 2 .debug_types.dwo
12138 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12139 DW_SECT_LINE 4 .debug_line.dwo
12140 DW_SECT_LOC 5 .debug_loc.dwo
12141 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12142 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12143 DW_SECT_MACRO 8 .debug_macro.dwo
12145 The offsets provided by the CU and TU index sections are the base offsets
12146 for the contributions made by each CU or TU to the corresponding section
12147 in the package file. Each CU and TU header contains an abbrev_offset
12148 field, used to find the abbreviations table for that CU or TU within the
12149 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12150 be interpreted as relative to the base offset given in the index section.
12151 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12152 should be interpreted as relative to the base offset for .debug_line.dwo,
12153 and offsets into other debug sections obtained from DWARF attributes should
12154 also be interpreted as relative to the corresponding base offset.
12156 The table of sizes begins immediately following the table of offsets.
12157 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12158 with L columns and N rows, in row-major order. Each row in the array is
12159 indexed starting from 1 (row 0 is shared by the two tables).
12163 Hash table lookup is handled the same in version 1 and 2:
12165 We assume that N and M will not exceed 2^32 - 1.
12166 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12168 Given a 64-bit compilation unit signature or a type signature S, an entry
12169 in the hash table is located as follows:
12171 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12172 the low-order k bits all set to 1.
12174 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12176 3) If the hash table entry at index H matches the signature, use that
12177 entry. If the hash table entry at index H is unused (all zeroes),
12178 terminate the search: the signature is not present in the table.
12180 4) Let H = (H + H') modulo M. Repeat at Step 3.
12182 Because M > N and H' and M are relatively prime, the search is guaranteed
12183 to stop at an unused slot or find the match. */
12185 /* Create a hash table to map DWO IDs to their CU/TU entry in
12186 .debug_{info,types}.dwo in DWP_FILE.
12187 Returns NULL if there isn't one.
12188 Note: This function processes DWP files only, not DWO files. */
12190 static struct dwp_hash_table
*
12191 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12192 struct dwp_file
*dwp_file
, int is_debug_types
)
12194 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12195 bfd
*dbfd
= dwp_file
->dbfd
;
12196 const gdb_byte
*index_ptr
, *index_end
;
12197 struct dwarf2_section_info
*index
;
12198 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12199 struct dwp_hash_table
*htab
;
12201 if (is_debug_types
)
12202 index
= &dwp_file
->sections
.tu_index
;
12204 index
= &dwp_file
->sections
.cu_index
;
12206 if (dwarf2_section_empty_p (index
))
12208 dwarf2_read_section (objfile
, index
);
12210 index_ptr
= index
->buffer
;
12211 index_end
= index_ptr
+ index
->size
;
12213 version
= read_4_bytes (dbfd
, index_ptr
);
12216 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12220 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12222 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12225 if (version
!= 1 && version
!= 2)
12227 error (_("Dwarf Error: unsupported DWP file version (%s)"
12228 " [in module %s]"),
12229 pulongest (version
), dwp_file
->name
);
12231 if (nr_slots
!= (nr_slots
& -nr_slots
))
12233 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12234 " is not power of 2 [in module %s]"),
12235 pulongest (nr_slots
), dwp_file
->name
);
12238 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12239 htab
->version
= version
;
12240 htab
->nr_columns
= nr_columns
;
12241 htab
->nr_units
= nr_units
;
12242 htab
->nr_slots
= nr_slots
;
12243 htab
->hash_table
= index_ptr
;
12244 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12246 /* Exit early if the table is empty. */
12247 if (nr_slots
== 0 || nr_units
== 0
12248 || (version
== 2 && nr_columns
== 0))
12250 /* All must be zero. */
12251 if (nr_slots
!= 0 || nr_units
!= 0
12252 || (version
== 2 && nr_columns
!= 0))
12254 complaint (&symfile_complaints
,
12255 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12256 " all zero [in modules %s]"),
12264 htab
->section_pool
.v1
.indices
=
12265 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12266 /* It's harder to decide whether the section is too small in v1.
12267 V1 is deprecated anyway so we punt. */
12271 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12272 int *ids
= htab
->section_pool
.v2
.section_ids
;
12273 /* Reverse map for error checking. */
12274 int ids_seen
[DW_SECT_MAX
+ 1];
12277 if (nr_columns
< 2)
12279 error (_("Dwarf Error: bad DWP hash table, too few columns"
12280 " in section table [in module %s]"),
12283 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12285 error (_("Dwarf Error: bad DWP hash table, too many columns"
12286 " in section table [in module %s]"),
12289 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12290 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12291 for (i
= 0; i
< nr_columns
; ++i
)
12293 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12295 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12297 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12298 " in section table [in module %s]"),
12299 id
, dwp_file
->name
);
12301 if (ids_seen
[id
] != -1)
12303 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12304 " id %d in section table [in module %s]"),
12305 id
, dwp_file
->name
);
12310 /* Must have exactly one info or types section. */
12311 if (((ids_seen
[DW_SECT_INFO
] != -1)
12312 + (ids_seen
[DW_SECT_TYPES
] != -1))
12315 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12316 " DWO info/types section [in module %s]"),
12319 /* Must have an abbrev section. */
12320 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12322 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12323 " section [in module %s]"),
12326 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12327 htab
->section_pool
.v2
.sizes
=
12328 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12329 * nr_units
* nr_columns
);
12330 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12331 * nr_units
* nr_columns
))
12334 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12335 " [in module %s]"),
12343 /* Update SECTIONS with the data from SECTP.
12345 This function is like the other "locate" section routines that are
12346 passed to bfd_map_over_sections, but in this context the sections to
12347 read comes from the DWP V1 hash table, not the full ELF section table.
12349 The result is non-zero for success, or zero if an error was found. */
12352 locate_v1_virtual_dwo_sections (asection
*sectp
,
12353 struct virtual_v1_dwo_sections
*sections
)
12355 const struct dwop_section_names
*names
= &dwop_section_names
;
12357 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12359 /* There can be only one. */
12360 if (sections
->abbrev
.s
.section
!= NULL
)
12362 sections
->abbrev
.s
.section
= sectp
;
12363 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12365 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12366 || section_is_p (sectp
->name
, &names
->types_dwo
))
12368 /* There can be only one. */
12369 if (sections
->info_or_types
.s
.section
!= NULL
)
12371 sections
->info_or_types
.s
.section
= sectp
;
12372 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12374 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12376 /* There can be only one. */
12377 if (sections
->line
.s
.section
!= NULL
)
12379 sections
->line
.s
.section
= sectp
;
12380 sections
->line
.size
= bfd_get_section_size (sectp
);
12382 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12384 /* There can be only one. */
12385 if (sections
->loc
.s
.section
!= NULL
)
12387 sections
->loc
.s
.section
= sectp
;
12388 sections
->loc
.size
= bfd_get_section_size (sectp
);
12390 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12392 /* There can be only one. */
12393 if (sections
->macinfo
.s
.section
!= NULL
)
12395 sections
->macinfo
.s
.section
= sectp
;
12396 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12398 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12400 /* There can be only one. */
12401 if (sections
->macro
.s
.section
!= NULL
)
12403 sections
->macro
.s
.section
= sectp
;
12404 sections
->macro
.size
= bfd_get_section_size (sectp
);
12406 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12408 /* There can be only one. */
12409 if (sections
->str_offsets
.s
.section
!= NULL
)
12411 sections
->str_offsets
.s
.section
= sectp
;
12412 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12416 /* No other kind of section is valid. */
12423 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12424 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12425 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12426 This is for DWP version 1 files. */
12428 static struct dwo_unit
*
12429 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12430 struct dwp_file
*dwp_file
,
12431 uint32_t unit_index
,
12432 const char *comp_dir
,
12433 ULONGEST signature
, int is_debug_types
)
12435 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12436 const struct dwp_hash_table
*dwp_htab
=
12437 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12438 bfd
*dbfd
= dwp_file
->dbfd
;
12439 const char *kind
= is_debug_types
? "TU" : "CU";
12440 struct dwo_file
*dwo_file
;
12441 struct dwo_unit
*dwo_unit
;
12442 struct virtual_v1_dwo_sections sections
;
12443 void **dwo_file_slot
;
12446 gdb_assert (dwp_file
->version
== 1);
12448 if (dwarf_read_debug
)
12450 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12452 pulongest (unit_index
), hex_string (signature
),
12456 /* Fetch the sections of this DWO unit.
12457 Put a limit on the number of sections we look for so that bad data
12458 doesn't cause us to loop forever. */
12460 #define MAX_NR_V1_DWO_SECTIONS \
12461 (1 /* .debug_info or .debug_types */ \
12462 + 1 /* .debug_abbrev */ \
12463 + 1 /* .debug_line */ \
12464 + 1 /* .debug_loc */ \
12465 + 1 /* .debug_str_offsets */ \
12466 + 1 /* .debug_macro or .debug_macinfo */ \
12467 + 1 /* trailing zero */)
12469 memset (§ions
, 0, sizeof (sections
));
12471 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12474 uint32_t section_nr
=
12475 read_4_bytes (dbfd
,
12476 dwp_htab
->section_pool
.v1
.indices
12477 + (unit_index
+ i
) * sizeof (uint32_t));
12479 if (section_nr
== 0)
12481 if (section_nr
>= dwp_file
->num_sections
)
12483 error (_("Dwarf Error: bad DWP hash table, section number too large"
12484 " [in module %s]"),
12488 sectp
= dwp_file
->elf_sections
[section_nr
];
12489 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12491 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12492 " [in module %s]"),
12498 || dwarf2_section_empty_p (§ions
.info_or_types
)
12499 || dwarf2_section_empty_p (§ions
.abbrev
))
12501 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12502 " [in module %s]"),
12505 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12507 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12508 " [in module %s]"),
12512 /* It's easier for the rest of the code if we fake a struct dwo_file and
12513 have dwo_unit "live" in that. At least for now.
12515 The DWP file can be made up of a random collection of CUs and TUs.
12516 However, for each CU + set of TUs that came from the same original DWO
12517 file, we can combine them back into a virtual DWO file to save space
12518 (fewer struct dwo_file objects to allocate). Remember that for really
12519 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12521 std::string virtual_dwo_name
=
12522 string_printf ("virtual-dwo/%d-%d-%d-%d",
12523 get_section_id (§ions
.abbrev
),
12524 get_section_id (§ions
.line
),
12525 get_section_id (§ions
.loc
),
12526 get_section_id (§ions
.str_offsets
));
12527 /* Can we use an existing virtual DWO file? */
12528 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12529 virtual_dwo_name
.c_str (),
12531 /* Create one if necessary. */
12532 if (*dwo_file_slot
== NULL
)
12534 if (dwarf_read_debug
)
12536 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12537 virtual_dwo_name
.c_str ());
12539 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12541 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12542 virtual_dwo_name
.c_str (),
12543 virtual_dwo_name
.size ());
12544 dwo_file
->comp_dir
= comp_dir
;
12545 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12546 dwo_file
->sections
.line
= sections
.line
;
12547 dwo_file
->sections
.loc
= sections
.loc
;
12548 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12549 dwo_file
->sections
.macro
= sections
.macro
;
12550 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12551 /* The "str" section is global to the entire DWP file. */
12552 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12553 /* The info or types section is assigned below to dwo_unit,
12554 there's no need to record it in dwo_file.
12555 Also, we can't simply record type sections in dwo_file because
12556 we record a pointer into the vector in dwo_unit. As we collect more
12557 types we'll grow the vector and eventually have to reallocate space
12558 for it, invalidating all copies of pointers into the previous
12560 *dwo_file_slot
= dwo_file
;
12564 if (dwarf_read_debug
)
12566 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12567 virtual_dwo_name
.c_str ());
12569 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12572 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12573 dwo_unit
->dwo_file
= dwo_file
;
12574 dwo_unit
->signature
= signature
;
12575 dwo_unit
->section
=
12576 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12577 *dwo_unit
->section
= sections
.info_or_types
;
12578 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12583 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12584 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12585 piece within that section used by a TU/CU, return a virtual section
12586 of just that piece. */
12588 static struct dwarf2_section_info
12589 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12590 struct dwarf2_section_info
*section
,
12591 bfd_size_type offset
, bfd_size_type size
)
12593 struct dwarf2_section_info result
;
12596 gdb_assert (section
!= NULL
);
12597 gdb_assert (!section
->is_virtual
);
12599 memset (&result
, 0, sizeof (result
));
12600 result
.s
.containing_section
= section
;
12601 result
.is_virtual
= 1;
12606 sectp
= get_section_bfd_section (section
);
12608 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12609 bounds of the real section. This is a pretty-rare event, so just
12610 flag an error (easier) instead of a warning and trying to cope. */
12612 || offset
+ size
> bfd_get_section_size (sectp
))
12614 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12615 " in section %s [in module %s]"),
12616 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12617 objfile_name (dwarf2_per_objfile
->objfile
));
12620 result
.virtual_offset
= offset
;
12621 result
.size
= size
;
12625 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12626 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12627 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12628 This is for DWP version 2 files. */
12630 static struct dwo_unit
*
12631 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12632 struct dwp_file
*dwp_file
,
12633 uint32_t unit_index
,
12634 const char *comp_dir
,
12635 ULONGEST signature
, int is_debug_types
)
12637 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12638 const struct dwp_hash_table
*dwp_htab
=
12639 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12640 bfd
*dbfd
= dwp_file
->dbfd
;
12641 const char *kind
= is_debug_types
? "TU" : "CU";
12642 struct dwo_file
*dwo_file
;
12643 struct dwo_unit
*dwo_unit
;
12644 struct virtual_v2_dwo_sections sections
;
12645 void **dwo_file_slot
;
12648 gdb_assert (dwp_file
->version
== 2);
12650 if (dwarf_read_debug
)
12652 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12654 pulongest (unit_index
), hex_string (signature
),
12658 /* Fetch the section offsets of this DWO unit. */
12660 memset (§ions
, 0, sizeof (sections
));
12662 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12664 uint32_t offset
= read_4_bytes (dbfd
,
12665 dwp_htab
->section_pool
.v2
.offsets
12666 + (((unit_index
- 1) * dwp_htab
->nr_columns
12668 * sizeof (uint32_t)));
12669 uint32_t size
= read_4_bytes (dbfd
,
12670 dwp_htab
->section_pool
.v2
.sizes
12671 + (((unit_index
- 1) * dwp_htab
->nr_columns
12673 * sizeof (uint32_t)));
12675 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12678 case DW_SECT_TYPES
:
12679 sections
.info_or_types_offset
= offset
;
12680 sections
.info_or_types_size
= size
;
12682 case DW_SECT_ABBREV
:
12683 sections
.abbrev_offset
= offset
;
12684 sections
.abbrev_size
= size
;
12687 sections
.line_offset
= offset
;
12688 sections
.line_size
= size
;
12691 sections
.loc_offset
= offset
;
12692 sections
.loc_size
= size
;
12694 case DW_SECT_STR_OFFSETS
:
12695 sections
.str_offsets_offset
= offset
;
12696 sections
.str_offsets_size
= size
;
12698 case DW_SECT_MACINFO
:
12699 sections
.macinfo_offset
= offset
;
12700 sections
.macinfo_size
= size
;
12702 case DW_SECT_MACRO
:
12703 sections
.macro_offset
= offset
;
12704 sections
.macro_size
= size
;
12709 /* It's easier for the rest of the code if we fake a struct dwo_file and
12710 have dwo_unit "live" in that. At least for now.
12712 The DWP file can be made up of a random collection of CUs and TUs.
12713 However, for each CU + set of TUs that came from the same original DWO
12714 file, we can combine them back into a virtual DWO file to save space
12715 (fewer struct dwo_file objects to allocate). Remember that for really
12716 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12718 std::string virtual_dwo_name
=
12719 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12720 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12721 (long) (sections
.line_size
? sections
.line_offset
: 0),
12722 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12723 (long) (sections
.str_offsets_size
12724 ? sections
.str_offsets_offset
: 0));
12725 /* Can we use an existing virtual DWO file? */
12726 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12727 virtual_dwo_name
.c_str (),
12729 /* Create one if necessary. */
12730 if (*dwo_file_slot
== NULL
)
12732 if (dwarf_read_debug
)
12734 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12735 virtual_dwo_name
.c_str ());
12737 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12739 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12740 virtual_dwo_name
.c_str (),
12741 virtual_dwo_name
.size ());
12742 dwo_file
->comp_dir
= comp_dir
;
12743 dwo_file
->sections
.abbrev
=
12744 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12745 sections
.abbrev_offset
, sections
.abbrev_size
);
12746 dwo_file
->sections
.line
=
12747 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12748 sections
.line_offset
, sections
.line_size
);
12749 dwo_file
->sections
.loc
=
12750 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12751 sections
.loc_offset
, sections
.loc_size
);
12752 dwo_file
->sections
.macinfo
=
12753 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12754 sections
.macinfo_offset
, sections
.macinfo_size
);
12755 dwo_file
->sections
.macro
=
12756 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12757 sections
.macro_offset
, sections
.macro_size
);
12758 dwo_file
->sections
.str_offsets
=
12759 create_dwp_v2_section (dwarf2_per_objfile
,
12760 &dwp_file
->sections
.str_offsets
,
12761 sections
.str_offsets_offset
,
12762 sections
.str_offsets_size
);
12763 /* The "str" section is global to the entire DWP file. */
12764 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12765 /* The info or types section is assigned below to dwo_unit,
12766 there's no need to record it in dwo_file.
12767 Also, we can't simply record type sections in dwo_file because
12768 we record a pointer into the vector in dwo_unit. As we collect more
12769 types we'll grow the vector and eventually have to reallocate space
12770 for it, invalidating all copies of pointers into the previous
12772 *dwo_file_slot
= dwo_file
;
12776 if (dwarf_read_debug
)
12778 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12779 virtual_dwo_name
.c_str ());
12781 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12784 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12785 dwo_unit
->dwo_file
= dwo_file
;
12786 dwo_unit
->signature
= signature
;
12787 dwo_unit
->section
=
12788 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12789 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12791 ? &dwp_file
->sections
.types
12792 : &dwp_file
->sections
.info
,
12793 sections
.info_or_types_offset
,
12794 sections
.info_or_types_size
);
12795 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12800 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12801 Returns NULL if the signature isn't found. */
12803 static struct dwo_unit
*
12804 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12805 struct dwp_file
*dwp_file
, const char *comp_dir
,
12806 ULONGEST signature
, int is_debug_types
)
12808 const struct dwp_hash_table
*dwp_htab
=
12809 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12810 bfd
*dbfd
= dwp_file
->dbfd
;
12811 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12812 uint32_t hash
= signature
& mask
;
12813 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12816 struct dwo_unit find_dwo_cu
;
12818 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12819 find_dwo_cu
.signature
= signature
;
12820 slot
= htab_find_slot (is_debug_types
12821 ? dwp_file
->loaded_tus
12822 : dwp_file
->loaded_cus
,
12823 &find_dwo_cu
, INSERT
);
12826 return (struct dwo_unit
*) *slot
;
12828 /* Use a for loop so that we don't loop forever on bad debug info. */
12829 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12831 ULONGEST signature_in_table
;
12833 signature_in_table
=
12834 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12835 if (signature_in_table
== signature
)
12837 uint32_t unit_index
=
12838 read_4_bytes (dbfd
,
12839 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12841 if (dwp_file
->version
== 1)
12843 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12844 dwp_file
, unit_index
,
12845 comp_dir
, signature
,
12850 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12851 dwp_file
, unit_index
,
12852 comp_dir
, signature
,
12855 return (struct dwo_unit
*) *slot
;
12857 if (signature_in_table
== 0)
12859 hash
= (hash
+ hash2
) & mask
;
12862 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12863 " [in module %s]"),
12867 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12868 Open the file specified by FILE_NAME and hand it off to BFD for
12869 preliminary analysis. Return a newly initialized bfd *, which
12870 includes a canonicalized copy of FILE_NAME.
12871 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12872 SEARCH_CWD is true if the current directory is to be searched.
12873 It will be searched before debug-file-directory.
12874 If successful, the file is added to the bfd include table of the
12875 objfile's bfd (see gdb_bfd_record_inclusion).
12876 If unable to find/open the file, return NULL.
12877 NOTE: This function is derived from symfile_bfd_open. */
12879 static gdb_bfd_ref_ptr
12880 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12881 const char *file_name
, int is_dwp
, int search_cwd
)
12884 char *absolute_name
;
12885 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12886 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12887 to debug_file_directory. */
12889 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12893 if (*debug_file_directory
!= '\0')
12894 search_path
= concat (".", dirname_separator_string
,
12895 debug_file_directory
, (char *) NULL
);
12897 search_path
= xstrdup (".");
12900 search_path
= xstrdup (debug_file_directory
);
12902 openp_flags flags
= OPF_RETURN_REALPATH
;
12904 flags
|= OPF_SEARCH_IN_PATH
;
12905 desc
= openp (search_path
, flags
, file_name
,
12906 O_RDONLY
| O_BINARY
, &absolute_name
);
12907 xfree (search_path
);
12911 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
12912 xfree (absolute_name
);
12913 if (sym_bfd
== NULL
)
12915 bfd_set_cacheable (sym_bfd
.get (), 1);
12917 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12920 /* Success. Record the bfd as having been included by the objfile's bfd.
12921 This is important because things like demangled_names_hash lives in the
12922 objfile's per_bfd space and may have references to things like symbol
12923 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12924 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12929 /* Try to open DWO file FILE_NAME.
12930 COMP_DIR is the DW_AT_comp_dir attribute.
12931 The result is the bfd handle of the file.
12932 If there is a problem finding or opening the file, return NULL.
12933 Upon success, the canonicalized path of the file is stored in the bfd,
12934 same as symfile_bfd_open. */
12936 static gdb_bfd_ref_ptr
12937 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12938 const char *file_name
, const char *comp_dir
)
12940 if (IS_ABSOLUTE_PATH (file_name
))
12941 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12942 0 /*is_dwp*/, 0 /*search_cwd*/);
12944 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12946 if (comp_dir
!= NULL
)
12948 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12949 file_name
, (char *) NULL
);
12951 /* NOTE: If comp_dir is a relative path, this will also try the
12952 search path, which seems useful. */
12953 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12956 1 /*search_cwd*/));
12957 xfree (path_to_try
);
12962 /* That didn't work, try debug-file-directory, which, despite its name,
12963 is a list of paths. */
12965 if (*debug_file_directory
== '\0')
12968 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12969 0 /*is_dwp*/, 1 /*search_cwd*/);
12972 /* This function is mapped across the sections and remembers the offset and
12973 size of each of the DWO debugging sections we are interested in. */
12976 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12978 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12979 const struct dwop_section_names
*names
= &dwop_section_names
;
12981 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12983 dwo_sections
->abbrev
.s
.section
= sectp
;
12984 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12986 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12988 dwo_sections
->info
.s
.section
= sectp
;
12989 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12991 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12993 dwo_sections
->line
.s
.section
= sectp
;
12994 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12996 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12998 dwo_sections
->loc
.s
.section
= sectp
;
12999 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
13001 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13003 dwo_sections
->macinfo
.s
.section
= sectp
;
13004 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
13006 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13008 dwo_sections
->macro
.s
.section
= sectp
;
13009 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
13011 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
13013 dwo_sections
->str
.s
.section
= sectp
;
13014 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
13016 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13018 dwo_sections
->str_offsets
.s
.section
= sectp
;
13019 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
13021 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13023 struct dwarf2_section_info type_section
;
13025 memset (&type_section
, 0, sizeof (type_section
));
13026 type_section
.s
.section
= sectp
;
13027 type_section
.size
= bfd_get_section_size (sectp
);
13028 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
13033 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
13034 by PER_CU. This is for the non-DWP case.
13035 The result is NULL if DWO_NAME can't be found. */
13037 static struct dwo_file
*
13038 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
13039 const char *dwo_name
, const char *comp_dir
)
13041 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
13042 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13043 struct dwo_file
*dwo_file
;
13044 struct cleanup
*cleanups
;
13046 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
13049 if (dwarf_read_debug
)
13050 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
13053 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
13054 dwo_file
->dwo_name
= dwo_name
;
13055 dwo_file
->comp_dir
= comp_dir
;
13056 dwo_file
->dbfd
= dbfd
.release ();
13058 free_dwo_file_cleanup_data
*cleanup_data
= XNEW (free_dwo_file_cleanup_data
);
13059 cleanup_data
->dwo_file
= dwo_file
;
13060 cleanup_data
->dwarf2_per_objfile
= dwarf2_per_objfile
;
13062 cleanups
= make_cleanup (free_dwo_file_cleanup
, cleanup_data
);
13064 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
13065 &dwo_file
->sections
);
13067 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
13070 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
,
13071 dwo_file
->sections
.types
, dwo_file
->tus
);
13073 discard_cleanups (cleanups
);
13075 if (dwarf_read_debug
)
13076 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13081 /* This function is mapped across the sections and remembers the offset and
13082 size of each of the DWP debugging sections common to version 1 and 2 that
13083 we are interested in. */
13086 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13087 void *dwp_file_ptr
)
13089 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13090 const struct dwop_section_names
*names
= &dwop_section_names
;
13091 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13093 /* Record the ELF section number for later lookup: this is what the
13094 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13095 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13096 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13098 /* Look for specific sections that we need. */
13099 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13101 dwp_file
->sections
.str
.s
.section
= sectp
;
13102 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
13104 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13106 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13107 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
13109 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13111 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13112 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
13116 /* This function is mapped across the sections and remembers the offset and
13117 size of each of the DWP version 2 debugging sections that we are interested
13118 in. This is split into a separate function because we don't know if we
13119 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13122 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13124 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13125 const struct dwop_section_names
*names
= &dwop_section_names
;
13126 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13128 /* Record the ELF section number for later lookup: this is what the
13129 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13130 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13131 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13133 /* Look for specific sections that we need. */
13134 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13136 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13137 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
13139 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13141 dwp_file
->sections
.info
.s
.section
= sectp
;
13142 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
13144 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13146 dwp_file
->sections
.line
.s
.section
= sectp
;
13147 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13149 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13151 dwp_file
->sections
.loc
.s
.section
= sectp
;
13152 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13154 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13156 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13157 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13159 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13161 dwp_file
->sections
.macro
.s
.section
= sectp
;
13162 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13164 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13166 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13167 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13169 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13171 dwp_file
->sections
.types
.s
.section
= sectp
;
13172 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13176 /* Hash function for dwp_file loaded CUs/TUs. */
13179 hash_dwp_loaded_cutus (const void *item
)
13181 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13183 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13184 return dwo_unit
->signature
;
13187 /* Equality function for dwp_file loaded CUs/TUs. */
13190 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13192 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13193 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13195 return dua
->signature
== dub
->signature
;
13198 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13201 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13203 return htab_create_alloc_ex (3,
13204 hash_dwp_loaded_cutus
,
13205 eq_dwp_loaded_cutus
,
13207 &objfile
->objfile_obstack
,
13208 hashtab_obstack_allocate
,
13209 dummy_obstack_deallocate
);
13212 /* Try to open DWP file FILE_NAME.
13213 The result is the bfd handle of the file.
13214 If there is a problem finding or opening the file, return NULL.
13215 Upon success, the canonicalized path of the file is stored in the bfd,
13216 same as symfile_bfd_open. */
13218 static gdb_bfd_ref_ptr
13219 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13220 const char *file_name
)
13222 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13224 1 /*search_cwd*/));
13228 /* Work around upstream bug 15652.
13229 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13230 [Whether that's a "bug" is debatable, but it is getting in our way.]
13231 We have no real idea where the dwp file is, because gdb's realpath-ing
13232 of the executable's path may have discarded the needed info.
13233 [IWBN if the dwp file name was recorded in the executable, akin to
13234 .gnu_debuglink, but that doesn't exist yet.]
13235 Strip the directory from FILE_NAME and search again. */
13236 if (*debug_file_directory
!= '\0')
13238 /* Don't implicitly search the current directory here.
13239 If the user wants to search "." to handle this case,
13240 it must be added to debug-file-directory. */
13241 return try_open_dwop_file (dwarf2_per_objfile
,
13242 lbasename (file_name
), 1 /*is_dwp*/,
13249 /* Initialize the use of the DWP file for the current objfile.
13250 By convention the name of the DWP file is ${objfile}.dwp.
13251 The result is NULL if it can't be found. */
13253 static struct dwp_file
*
13254 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13256 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13257 struct dwp_file
*dwp_file
;
13259 /* Try to find first .dwp for the binary file before any symbolic links
13262 /* If the objfile is a debug file, find the name of the real binary
13263 file and get the name of dwp file from there. */
13264 std::string dwp_name
;
13265 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13267 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13268 const char *backlink_basename
= lbasename (backlink
->original_name
);
13270 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13273 dwp_name
= objfile
->original_name
;
13275 dwp_name
+= ".dwp";
13277 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13279 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13281 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13282 dwp_name
= objfile_name (objfile
);
13283 dwp_name
+= ".dwp";
13284 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13289 if (dwarf_read_debug
)
13290 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13293 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
13294 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
13295 dwp_file
->dbfd
= dbfd
.release ();
13297 /* +1: section 0 is unused */
13298 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13299 dwp_file
->elf_sections
=
13300 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13301 dwp_file
->num_sections
, asection
*);
13303 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
13306 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 0);
13308 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 1);
13310 /* The DWP file version is stored in the hash table. Oh well. */
13311 if (dwp_file
->cus
&& dwp_file
->tus
13312 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13314 /* Technically speaking, we should try to limp along, but this is
13315 pretty bizarre. We use pulongest here because that's the established
13316 portability solution (e.g, we cannot use %u for uint32_t). */
13317 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13318 " TU version %s [in DWP file %s]"),
13319 pulongest (dwp_file
->cus
->version
),
13320 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13324 dwp_file
->version
= dwp_file
->cus
->version
;
13325 else if (dwp_file
->tus
)
13326 dwp_file
->version
= dwp_file
->tus
->version
;
13328 dwp_file
->version
= 2;
13330 if (dwp_file
->version
== 2)
13331 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
13334 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13335 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13337 if (dwarf_read_debug
)
13339 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13340 fprintf_unfiltered (gdb_stdlog
,
13341 " %s CUs, %s TUs\n",
13342 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13343 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13349 /* Wrapper around open_and_init_dwp_file, only open it once. */
13351 static struct dwp_file
*
13352 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13354 if (! dwarf2_per_objfile
->dwp_checked
)
13356 dwarf2_per_objfile
->dwp_file
13357 = open_and_init_dwp_file (dwarf2_per_objfile
);
13358 dwarf2_per_objfile
->dwp_checked
= 1;
13360 return dwarf2_per_objfile
->dwp_file
;
13363 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13364 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13365 or in the DWP file for the objfile, referenced by THIS_UNIT.
13366 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13367 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13369 This is called, for example, when wanting to read a variable with a
13370 complex location. Therefore we don't want to do file i/o for every call.
13371 Therefore we don't want to look for a DWO file on every call.
13372 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13373 then we check if we've already seen DWO_NAME, and only THEN do we check
13376 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13377 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13379 static struct dwo_unit
*
13380 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13381 const char *dwo_name
, const char *comp_dir
,
13382 ULONGEST signature
, int is_debug_types
)
13384 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13385 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13386 const char *kind
= is_debug_types
? "TU" : "CU";
13387 void **dwo_file_slot
;
13388 struct dwo_file
*dwo_file
;
13389 struct dwp_file
*dwp_file
;
13391 /* First see if there's a DWP file.
13392 If we have a DWP file but didn't find the DWO inside it, don't
13393 look for the original DWO file. It makes gdb behave differently
13394 depending on whether one is debugging in the build tree. */
13396 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13397 if (dwp_file
!= NULL
)
13399 const struct dwp_hash_table
*dwp_htab
=
13400 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13402 if (dwp_htab
!= NULL
)
13404 struct dwo_unit
*dwo_cutu
=
13405 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13406 signature
, is_debug_types
);
13408 if (dwo_cutu
!= NULL
)
13410 if (dwarf_read_debug
)
13412 fprintf_unfiltered (gdb_stdlog
,
13413 "Virtual DWO %s %s found: @%s\n",
13414 kind
, hex_string (signature
),
13415 host_address_to_string (dwo_cutu
));
13423 /* No DWP file, look for the DWO file. */
13425 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13426 dwo_name
, comp_dir
);
13427 if (*dwo_file_slot
== NULL
)
13429 /* Read in the file and build a table of the CUs/TUs it contains. */
13430 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13432 /* NOTE: This will be NULL if unable to open the file. */
13433 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13435 if (dwo_file
!= NULL
)
13437 struct dwo_unit
*dwo_cutu
= NULL
;
13439 if (is_debug_types
&& dwo_file
->tus
)
13441 struct dwo_unit find_dwo_cutu
;
13443 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13444 find_dwo_cutu
.signature
= signature
;
13446 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13448 else if (!is_debug_types
&& dwo_file
->cus
)
13450 struct dwo_unit find_dwo_cutu
;
13452 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13453 find_dwo_cutu
.signature
= signature
;
13454 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13458 if (dwo_cutu
!= NULL
)
13460 if (dwarf_read_debug
)
13462 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13463 kind
, dwo_name
, hex_string (signature
),
13464 host_address_to_string (dwo_cutu
));
13471 /* We didn't find it. This could mean a dwo_id mismatch, or
13472 someone deleted the DWO/DWP file, or the search path isn't set up
13473 correctly to find the file. */
13475 if (dwarf_read_debug
)
13477 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13478 kind
, dwo_name
, hex_string (signature
));
13481 /* This is a warning and not a complaint because it can be caused by
13482 pilot error (e.g., user accidentally deleting the DWO). */
13484 /* Print the name of the DWP file if we looked there, helps the user
13485 better diagnose the problem. */
13486 std::string dwp_text
;
13488 if (dwp_file
!= NULL
)
13489 dwp_text
= string_printf (" [in DWP file %s]",
13490 lbasename (dwp_file
->name
));
13492 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
13493 " [in module %s]"),
13494 kind
, dwo_name
, hex_string (signature
),
13496 this_unit
->is_debug_types
? "TU" : "CU",
13497 to_underlying (this_unit
->sect_off
), objfile_name (objfile
));
13502 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13503 See lookup_dwo_cutu_unit for details. */
13505 static struct dwo_unit
*
13506 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13507 const char *dwo_name
, const char *comp_dir
,
13508 ULONGEST signature
)
13510 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13513 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13514 See lookup_dwo_cutu_unit for details. */
13516 static struct dwo_unit
*
13517 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13518 const char *dwo_name
, const char *comp_dir
)
13520 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13523 /* Traversal function for queue_and_load_all_dwo_tus. */
13526 queue_and_load_dwo_tu (void **slot
, void *info
)
13528 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13529 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13530 ULONGEST signature
= dwo_unit
->signature
;
13531 struct signatured_type
*sig_type
=
13532 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13534 if (sig_type
!= NULL
)
13536 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13538 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13539 a real dependency of PER_CU on SIG_TYPE. That is detected later
13540 while processing PER_CU. */
13541 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13542 load_full_type_unit (sig_cu
);
13543 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13549 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13550 The DWO may have the only definition of the type, though it may not be
13551 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13552 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13555 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13557 struct dwo_unit
*dwo_unit
;
13558 struct dwo_file
*dwo_file
;
13560 gdb_assert (!per_cu
->is_debug_types
);
13561 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13562 gdb_assert (per_cu
->cu
!= NULL
);
13564 dwo_unit
= per_cu
->cu
->dwo_unit
;
13565 gdb_assert (dwo_unit
!= NULL
);
13567 dwo_file
= dwo_unit
->dwo_file
;
13568 if (dwo_file
->tus
!= NULL
)
13569 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13572 /* Free all resources associated with DWO_FILE.
13573 Close the DWO file and munmap the sections.
13574 All memory should be on the objfile obstack. */
13577 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
13580 /* Note: dbfd is NULL for virtual DWO files. */
13581 gdb_bfd_unref (dwo_file
->dbfd
);
13583 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13586 /* Wrapper for free_dwo_file for use in cleanups. */
13589 free_dwo_file_cleanup (void *arg
)
13591 struct free_dwo_file_cleanup_data
*data
13592 = (struct free_dwo_file_cleanup_data
*) arg
;
13593 struct objfile
*objfile
= data
->dwarf2_per_objfile
->objfile
;
13595 free_dwo_file (data
->dwo_file
, objfile
);
13600 /* Traversal function for free_dwo_files. */
13603 free_dwo_file_from_slot (void **slot
, void *info
)
13605 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13606 struct objfile
*objfile
= (struct objfile
*) info
;
13608 free_dwo_file (dwo_file
, objfile
);
13613 /* Free all resources associated with DWO_FILES. */
13616 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13618 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13621 /* Read in various DIEs. */
13623 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13624 Inherit only the children of the DW_AT_abstract_origin DIE not being
13625 already referenced by DW_AT_abstract_origin from the children of the
13629 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13631 struct die_info
*child_die
;
13632 sect_offset
*offsetp
;
13633 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13634 struct die_info
*origin_die
;
13635 /* Iterator of the ORIGIN_DIE children. */
13636 struct die_info
*origin_child_die
;
13637 struct attribute
*attr
;
13638 struct dwarf2_cu
*origin_cu
;
13639 struct pending
**origin_previous_list_in_scope
;
13641 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13645 /* Note that following die references may follow to a die in a
13649 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13651 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13653 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13654 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13656 if (die
->tag
!= origin_die
->tag
13657 && !(die
->tag
== DW_TAG_inlined_subroutine
13658 && origin_die
->tag
== DW_TAG_subprogram
))
13659 complaint (&symfile_complaints
,
13660 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
13661 to_underlying (die
->sect_off
),
13662 to_underlying (origin_die
->sect_off
));
13664 std::vector
<sect_offset
> offsets
;
13666 for (child_die
= die
->child
;
13667 child_die
&& child_die
->tag
;
13668 child_die
= sibling_die (child_die
))
13670 struct die_info
*child_origin_die
;
13671 struct dwarf2_cu
*child_origin_cu
;
13673 /* We are trying to process concrete instance entries:
13674 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13675 it's not relevant to our analysis here. i.e. detecting DIEs that are
13676 present in the abstract instance but not referenced in the concrete
13678 if (child_die
->tag
== DW_TAG_call_site
13679 || child_die
->tag
== DW_TAG_GNU_call_site
)
13682 /* For each CHILD_DIE, find the corresponding child of
13683 ORIGIN_DIE. If there is more than one layer of
13684 DW_AT_abstract_origin, follow them all; there shouldn't be,
13685 but GCC versions at least through 4.4 generate this (GCC PR
13687 child_origin_die
= child_die
;
13688 child_origin_cu
= cu
;
13691 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13695 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13699 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13700 counterpart may exist. */
13701 if (child_origin_die
!= child_die
)
13703 if (child_die
->tag
!= child_origin_die
->tag
13704 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13705 && child_origin_die
->tag
== DW_TAG_subprogram
))
13706 complaint (&symfile_complaints
,
13707 _("Child DIE 0x%x and its abstract origin 0x%x have "
13709 to_underlying (child_die
->sect_off
),
13710 to_underlying (child_origin_die
->sect_off
));
13711 if (child_origin_die
->parent
!= origin_die
)
13712 complaint (&symfile_complaints
,
13713 _("Child DIE 0x%x and its abstract origin 0x%x have "
13714 "different parents"),
13715 to_underlying (child_die
->sect_off
),
13716 to_underlying (child_origin_die
->sect_off
));
13718 offsets
.push_back (child_origin_die
->sect_off
);
13721 std::sort (offsets
.begin (), offsets
.end ());
13722 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13723 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13724 if (offsetp
[-1] == *offsetp
)
13725 complaint (&symfile_complaints
,
13726 _("Multiple children of DIE 0x%x refer "
13727 "to DIE 0x%x as their abstract origin"),
13728 to_underlying (die
->sect_off
), to_underlying (*offsetp
));
13730 offsetp
= offsets
.data ();
13731 origin_child_die
= origin_die
->child
;
13732 while (origin_child_die
&& origin_child_die
->tag
)
13734 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13735 while (offsetp
< offsets_end
13736 && *offsetp
< origin_child_die
->sect_off
)
13738 if (offsetp
>= offsets_end
13739 || *offsetp
> origin_child_die
->sect_off
)
13741 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13742 Check whether we're already processing ORIGIN_CHILD_DIE.
13743 This can happen with mutually referenced abstract_origins.
13745 if (!origin_child_die
->in_process
)
13746 process_die (origin_child_die
, origin_cu
);
13748 origin_child_die
= sibling_die (origin_child_die
);
13750 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13754 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13756 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13757 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13758 struct context_stack
*newobj
;
13761 struct die_info
*child_die
;
13762 struct attribute
*attr
, *call_line
, *call_file
;
13764 CORE_ADDR baseaddr
;
13765 struct block
*block
;
13766 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13767 std::vector
<struct symbol
*> template_args
;
13768 struct template_symbol
*templ_func
= NULL
;
13772 /* If we do not have call site information, we can't show the
13773 caller of this inlined function. That's too confusing, so
13774 only use the scope for local variables. */
13775 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13776 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13777 if (call_line
== NULL
|| call_file
== NULL
)
13779 read_lexical_block_scope (die
, cu
);
13784 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13786 name
= dwarf2_name (die
, cu
);
13788 /* Ignore functions with missing or empty names. These are actually
13789 illegal according to the DWARF standard. */
13792 complaint (&symfile_complaints
,
13793 _("missing name for subprogram DIE at %d"),
13794 to_underlying (die
->sect_off
));
13798 /* Ignore functions with missing or invalid low and high pc attributes. */
13799 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13800 <= PC_BOUNDS_INVALID
)
13802 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13803 if (!attr
|| !DW_UNSND (attr
))
13804 complaint (&symfile_complaints
,
13805 _("cannot get low and high bounds "
13806 "for subprogram DIE at %d"),
13807 to_underlying (die
->sect_off
));
13811 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13812 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13814 /* If we have any template arguments, then we must allocate a
13815 different sort of symbol. */
13816 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13818 if (child_die
->tag
== DW_TAG_template_type_param
13819 || child_die
->tag
== DW_TAG_template_value_param
)
13821 templ_func
= allocate_template_symbol (objfile
);
13822 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13827 newobj
= push_context (0, lowpc
);
13828 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13829 (struct symbol
*) templ_func
);
13831 /* If there is a location expression for DW_AT_frame_base, record
13833 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13835 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13837 /* If there is a location for the static link, record it. */
13838 newobj
->static_link
= NULL
;
13839 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13842 newobj
->static_link
13843 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13844 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13847 cu
->list_in_scope
= &local_symbols
;
13849 if (die
->child
!= NULL
)
13851 child_die
= die
->child
;
13852 while (child_die
&& child_die
->tag
)
13854 if (child_die
->tag
== DW_TAG_template_type_param
13855 || child_die
->tag
== DW_TAG_template_value_param
)
13857 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13860 template_args
.push_back (arg
);
13863 process_die (child_die
, cu
);
13864 child_die
= sibling_die (child_die
);
13868 inherit_abstract_dies (die
, cu
);
13870 /* If we have a DW_AT_specification, we might need to import using
13871 directives from the context of the specification DIE. See the
13872 comment in determine_prefix. */
13873 if (cu
->language
== language_cplus
13874 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13876 struct dwarf2_cu
*spec_cu
= cu
;
13877 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13881 child_die
= spec_die
->child
;
13882 while (child_die
&& child_die
->tag
)
13884 if (child_die
->tag
== DW_TAG_imported_module
)
13885 process_die (child_die
, spec_cu
);
13886 child_die
= sibling_die (child_die
);
13889 /* In some cases, GCC generates specification DIEs that
13890 themselves contain DW_AT_specification attributes. */
13891 spec_die
= die_specification (spec_die
, &spec_cu
);
13895 newobj
= pop_context ();
13896 /* Make a block for the local symbols within. */
13897 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13898 newobj
->static_link
, lowpc
, highpc
);
13900 /* For C++, set the block's scope. */
13901 if ((cu
->language
== language_cplus
13902 || cu
->language
== language_fortran
13903 || cu
->language
== language_d
13904 || cu
->language
== language_rust
)
13905 && cu
->processing_has_namespace_info
)
13906 block_set_scope (block
, determine_prefix (die
, cu
),
13907 &objfile
->objfile_obstack
);
13909 /* If we have address ranges, record them. */
13910 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13912 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13914 /* Attach template arguments to function. */
13915 if (!template_args
.empty ())
13917 gdb_assert (templ_func
!= NULL
);
13919 templ_func
->n_template_arguments
= template_args
.size ();
13920 templ_func
->template_arguments
13921 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13922 templ_func
->n_template_arguments
);
13923 memcpy (templ_func
->template_arguments
,
13924 template_args
.data (),
13925 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13928 /* In C++, we can have functions nested inside functions (e.g., when
13929 a function declares a class that has methods). This means that
13930 when we finish processing a function scope, we may need to go
13931 back to building a containing block's symbol lists. */
13932 local_symbols
= newobj
->locals
;
13933 local_using_directives
= newobj
->local_using_directives
;
13935 /* If we've finished processing a top-level function, subsequent
13936 symbols go in the file symbol list. */
13937 if (outermost_context_p ())
13938 cu
->list_in_scope
= &file_symbols
;
13941 /* Process all the DIES contained within a lexical block scope. Start
13942 a new scope, process the dies, and then close the scope. */
13945 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13947 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13948 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13949 struct context_stack
*newobj
;
13950 CORE_ADDR lowpc
, highpc
;
13951 struct die_info
*child_die
;
13952 CORE_ADDR baseaddr
;
13954 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13956 /* Ignore blocks with missing or invalid low and high pc attributes. */
13957 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13958 as multiple lexical blocks? Handling children in a sane way would
13959 be nasty. Might be easier to properly extend generic blocks to
13960 describe ranges. */
13961 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13963 case PC_BOUNDS_NOT_PRESENT
:
13964 /* DW_TAG_lexical_block has no attributes, process its children as if
13965 there was no wrapping by that DW_TAG_lexical_block.
13966 GCC does no longer produces such DWARF since GCC r224161. */
13967 for (child_die
= die
->child
;
13968 child_die
!= NULL
&& child_die
->tag
;
13969 child_die
= sibling_die (child_die
))
13970 process_die (child_die
, cu
);
13972 case PC_BOUNDS_INVALID
:
13975 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13976 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13978 push_context (0, lowpc
);
13979 if (die
->child
!= NULL
)
13981 child_die
= die
->child
;
13982 while (child_die
&& child_die
->tag
)
13984 process_die (child_die
, cu
);
13985 child_die
= sibling_die (child_die
);
13988 inherit_abstract_dies (die
, cu
);
13989 newobj
= pop_context ();
13991 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13993 struct block
*block
13994 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13995 newobj
->start_addr
, highpc
);
13997 /* Note that recording ranges after traversing children, as we
13998 do here, means that recording a parent's ranges entails
13999 walking across all its children's ranges as they appear in
14000 the address map, which is quadratic behavior.
14002 It would be nicer to record the parent's ranges before
14003 traversing its children, simply overriding whatever you find
14004 there. But since we don't even decide whether to create a
14005 block until after we've traversed its children, that's hard
14007 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
14009 local_symbols
= newobj
->locals
;
14010 local_using_directives
= newobj
->local_using_directives
;
14013 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
14016 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14018 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14019 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14020 CORE_ADDR pc
, baseaddr
;
14021 struct attribute
*attr
;
14022 struct call_site
*call_site
, call_site_local
;
14025 struct die_info
*child_die
;
14027 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14029 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
14032 /* This was a pre-DWARF-5 GNU extension alias
14033 for DW_AT_call_return_pc. */
14034 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14038 complaint (&symfile_complaints
,
14039 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
14040 "DIE 0x%x [in module %s]"),
14041 to_underlying (die
->sect_off
), objfile_name (objfile
));
14044 pc
= attr_value_as_address (attr
) + baseaddr
;
14045 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
14047 if (cu
->call_site_htab
== NULL
)
14048 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
14049 NULL
, &objfile
->objfile_obstack
,
14050 hashtab_obstack_allocate
, NULL
);
14051 call_site_local
.pc
= pc
;
14052 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
14055 complaint (&symfile_complaints
,
14056 _("Duplicate PC %s for DW_TAG_call_site "
14057 "DIE 0x%x [in module %s]"),
14058 paddress (gdbarch
, pc
), to_underlying (die
->sect_off
),
14059 objfile_name (objfile
));
14063 /* Count parameters at the caller. */
14066 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
14067 child_die
= sibling_die (child_die
))
14069 if (child_die
->tag
!= DW_TAG_call_site_parameter
14070 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14072 complaint (&symfile_complaints
,
14073 _("Tag %d is not DW_TAG_call_site_parameter in "
14074 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
14075 child_die
->tag
, to_underlying (child_die
->sect_off
),
14076 objfile_name (objfile
));
14084 = ((struct call_site
*)
14085 obstack_alloc (&objfile
->objfile_obstack
,
14086 sizeof (*call_site
)
14087 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
14089 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
14090 call_site
->pc
= pc
;
14092 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14093 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14095 struct die_info
*func_die
;
14097 /* Skip also over DW_TAG_inlined_subroutine. */
14098 for (func_die
= die
->parent
;
14099 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14100 && func_die
->tag
!= DW_TAG_subroutine_type
;
14101 func_die
= func_die
->parent
);
14103 /* DW_AT_call_all_calls is a superset
14104 of DW_AT_call_all_tail_calls. */
14106 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14107 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14108 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14109 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14111 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14112 not complete. But keep CALL_SITE for look ups via call_site_htab,
14113 both the initial caller containing the real return address PC and
14114 the final callee containing the current PC of a chain of tail
14115 calls do not need to have the tail call list complete. But any
14116 function candidate for a virtual tail call frame searched via
14117 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14118 determined unambiguously. */
14122 struct type
*func_type
= NULL
;
14125 func_type
= get_die_type (func_die
, cu
);
14126 if (func_type
!= NULL
)
14128 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14130 /* Enlist this call site to the function. */
14131 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14132 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14135 complaint (&symfile_complaints
,
14136 _("Cannot find function owning DW_TAG_call_site "
14137 "DIE 0x%x [in module %s]"),
14138 to_underlying (die
->sect_off
), objfile_name (objfile
));
14142 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14144 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14146 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14149 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14150 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14152 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14153 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14154 /* Keep NULL DWARF_BLOCK. */;
14155 else if (attr_form_is_block (attr
))
14157 struct dwarf2_locexpr_baton
*dlbaton
;
14159 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14160 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14161 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14162 dlbaton
->per_cu
= cu
->per_cu
;
14164 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14166 else if (attr_form_is_ref (attr
))
14168 struct dwarf2_cu
*target_cu
= cu
;
14169 struct die_info
*target_die
;
14171 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14172 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14173 if (die_is_declaration (target_die
, target_cu
))
14175 const char *target_physname
;
14177 /* Prefer the mangled name; otherwise compute the demangled one. */
14178 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14179 if (target_physname
== NULL
)
14180 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14181 if (target_physname
== NULL
)
14182 complaint (&symfile_complaints
,
14183 _("DW_AT_call_target target DIE has invalid "
14184 "physname, for referencing DIE 0x%x [in module %s]"),
14185 to_underlying (die
->sect_off
), objfile_name (objfile
));
14187 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14193 /* DW_AT_entry_pc should be preferred. */
14194 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14195 <= PC_BOUNDS_INVALID
)
14196 complaint (&symfile_complaints
,
14197 _("DW_AT_call_target target DIE has invalid "
14198 "low pc, for referencing DIE 0x%x [in module %s]"),
14199 to_underlying (die
->sect_off
), objfile_name (objfile
));
14202 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14203 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14208 complaint (&symfile_complaints
,
14209 _("DW_TAG_call_site DW_AT_call_target is neither "
14210 "block nor reference, for DIE 0x%x [in module %s]"),
14211 to_underlying (die
->sect_off
), objfile_name (objfile
));
14213 call_site
->per_cu
= cu
->per_cu
;
14215 for (child_die
= die
->child
;
14216 child_die
&& child_die
->tag
;
14217 child_die
= sibling_die (child_die
))
14219 struct call_site_parameter
*parameter
;
14220 struct attribute
*loc
, *origin
;
14222 if (child_die
->tag
!= DW_TAG_call_site_parameter
14223 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14225 /* Already printed the complaint above. */
14229 gdb_assert (call_site
->parameter_count
< nparams
);
14230 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14232 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14233 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14234 register is contained in DW_AT_call_value. */
14236 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14237 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14238 if (origin
== NULL
)
14240 /* This was a pre-DWARF-5 GNU extension alias
14241 for DW_AT_call_parameter. */
14242 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14244 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14246 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14248 sect_offset sect_off
14249 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14250 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14252 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14253 binding can be done only inside one CU. Such referenced DIE
14254 therefore cannot be even moved to DW_TAG_partial_unit. */
14255 complaint (&symfile_complaints
,
14256 _("DW_AT_call_parameter offset is not in CU for "
14257 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
14258 to_underlying (child_die
->sect_off
),
14259 objfile_name (objfile
));
14262 parameter
->u
.param_cu_off
14263 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14265 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14267 complaint (&symfile_complaints
,
14268 _("No DW_FORM_block* DW_AT_location for "
14269 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
14270 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
14275 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14276 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14277 if (parameter
->u
.dwarf_reg
!= -1)
14278 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14279 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14280 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14281 ¶meter
->u
.fb_offset
))
14282 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14285 complaint (&symfile_complaints
,
14286 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14287 "for DW_FORM_block* DW_AT_location is supported for "
14288 "DW_TAG_call_site child DIE 0x%x "
14290 to_underlying (child_die
->sect_off
),
14291 objfile_name (objfile
));
14296 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14298 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14299 if (!attr_form_is_block (attr
))
14301 complaint (&symfile_complaints
,
14302 _("No DW_FORM_block* DW_AT_call_value for "
14303 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
14304 to_underlying (child_die
->sect_off
),
14305 objfile_name (objfile
));
14308 parameter
->value
= DW_BLOCK (attr
)->data
;
14309 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14311 /* Parameters are not pre-cleared by memset above. */
14312 parameter
->data_value
= NULL
;
14313 parameter
->data_value_size
= 0;
14314 call_site
->parameter_count
++;
14316 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14318 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14321 if (!attr_form_is_block (attr
))
14322 complaint (&symfile_complaints
,
14323 _("No DW_FORM_block* DW_AT_call_data_value for "
14324 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
14325 to_underlying (child_die
->sect_off
),
14326 objfile_name (objfile
));
14329 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14330 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14336 /* Helper function for read_variable. If DIE represents a virtual
14337 table, then return the type of the concrete object that is
14338 associated with the virtual table. Otherwise, return NULL. */
14340 static struct type
*
14341 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14343 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14347 /* Find the type DIE. */
14348 struct die_info
*type_die
= NULL
;
14349 struct dwarf2_cu
*type_cu
= cu
;
14351 if (attr_form_is_ref (attr
))
14352 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14353 if (type_die
== NULL
)
14356 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14358 return die_containing_type (type_die
, type_cu
);
14361 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14364 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14366 struct rust_vtable_symbol
*storage
= NULL
;
14368 if (cu
->language
== language_rust
)
14370 struct type
*containing_type
= rust_containing_type (die
, cu
);
14372 if (containing_type
!= NULL
)
14374 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14376 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14377 struct rust_vtable_symbol
);
14378 initialize_objfile_symbol (storage
);
14379 storage
->concrete_type
= containing_type
;
14380 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14384 new_symbol (die
, NULL
, cu
, storage
);
14387 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14388 reading .debug_rnglists.
14389 Callback's type should be:
14390 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14391 Return true if the attributes are present and valid, otherwise,
14394 template <typename Callback
>
14396 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14397 Callback
&&callback
)
14399 struct dwarf2_per_objfile
*dwarf2_per_objfile
14400 = cu
->per_cu
->dwarf2_per_objfile
;
14401 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14402 bfd
*obfd
= objfile
->obfd
;
14403 /* Base address selection entry. */
14406 const gdb_byte
*buffer
;
14407 CORE_ADDR baseaddr
;
14408 bool overflow
= false;
14410 found_base
= cu
->base_known
;
14411 base
= cu
->base_address
;
14413 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14414 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14416 complaint (&symfile_complaints
,
14417 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14421 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14423 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14427 /* Initialize it due to a false compiler warning. */
14428 CORE_ADDR range_beginning
= 0, range_end
= 0;
14429 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14430 + dwarf2_per_objfile
->rnglists
.size
);
14431 unsigned int bytes_read
;
14433 if (buffer
== buf_end
)
14438 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14441 case DW_RLE_end_of_list
:
14443 case DW_RLE_base_address
:
14444 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14449 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14451 buffer
+= bytes_read
;
14453 case DW_RLE_start_length
:
14454 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14459 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14460 buffer
+= bytes_read
;
14461 range_end
= (range_beginning
14462 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14463 buffer
+= bytes_read
;
14464 if (buffer
> buf_end
)
14470 case DW_RLE_offset_pair
:
14471 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14472 buffer
+= bytes_read
;
14473 if (buffer
> buf_end
)
14478 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14479 buffer
+= bytes_read
;
14480 if (buffer
> buf_end
)
14486 case DW_RLE_start_end
:
14487 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14492 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14493 buffer
+= bytes_read
;
14494 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14495 buffer
+= bytes_read
;
14498 complaint (&symfile_complaints
,
14499 _("Invalid .debug_rnglists data (no base address)"));
14502 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14504 if (rlet
== DW_RLE_base_address
)
14509 /* We have no valid base address for the ranges
14511 complaint (&symfile_complaints
,
14512 _("Invalid .debug_rnglists data (no base address)"));
14516 if (range_beginning
> range_end
)
14518 /* Inverted range entries are invalid. */
14519 complaint (&symfile_complaints
,
14520 _("Invalid .debug_rnglists data (inverted range)"));
14524 /* Empty range entries have no effect. */
14525 if (range_beginning
== range_end
)
14528 range_beginning
+= base
;
14531 /* A not-uncommon case of bad debug info.
14532 Don't pollute the addrmap with bad data. */
14533 if (range_beginning
+ baseaddr
== 0
14534 && !dwarf2_per_objfile
->has_section_at_zero
)
14536 complaint (&symfile_complaints
,
14537 _(".debug_rnglists entry has start address of zero"
14538 " [in module %s]"), objfile_name (objfile
));
14542 callback (range_beginning
, range_end
);
14547 complaint (&symfile_complaints
,
14548 _("Offset %d is not terminated "
14549 "for DW_AT_ranges attribute"),
14557 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14558 Callback's type should be:
14559 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14560 Return 1 if the attributes are present and valid, otherwise, return 0. */
14562 template <typename Callback
>
14564 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14565 Callback
&&callback
)
14567 struct dwarf2_per_objfile
*dwarf2_per_objfile
14568 = cu
->per_cu
->dwarf2_per_objfile
;
14569 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14570 struct comp_unit_head
*cu_header
= &cu
->header
;
14571 bfd
*obfd
= objfile
->obfd
;
14572 unsigned int addr_size
= cu_header
->addr_size
;
14573 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14574 /* Base address selection entry. */
14577 unsigned int dummy
;
14578 const gdb_byte
*buffer
;
14579 CORE_ADDR baseaddr
;
14581 if (cu_header
->version
>= 5)
14582 return dwarf2_rnglists_process (offset
, cu
, callback
);
14584 found_base
= cu
->base_known
;
14585 base
= cu
->base_address
;
14587 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14588 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14590 complaint (&symfile_complaints
,
14591 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14595 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14597 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14601 CORE_ADDR range_beginning
, range_end
;
14603 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14604 buffer
+= addr_size
;
14605 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14606 buffer
+= addr_size
;
14607 offset
+= 2 * addr_size
;
14609 /* An end of list marker is a pair of zero addresses. */
14610 if (range_beginning
== 0 && range_end
== 0)
14611 /* Found the end of list entry. */
14614 /* Each base address selection entry is a pair of 2 values.
14615 The first is the largest possible address, the second is
14616 the base address. Check for a base address here. */
14617 if ((range_beginning
& mask
) == mask
)
14619 /* If we found the largest possible address, then we already
14620 have the base address in range_end. */
14628 /* We have no valid base address for the ranges
14630 complaint (&symfile_complaints
,
14631 _("Invalid .debug_ranges data (no base address)"));
14635 if (range_beginning
> range_end
)
14637 /* Inverted range entries are invalid. */
14638 complaint (&symfile_complaints
,
14639 _("Invalid .debug_ranges data (inverted range)"));
14643 /* Empty range entries have no effect. */
14644 if (range_beginning
== range_end
)
14647 range_beginning
+= base
;
14650 /* A not-uncommon case of bad debug info.
14651 Don't pollute the addrmap with bad data. */
14652 if (range_beginning
+ baseaddr
== 0
14653 && !dwarf2_per_objfile
->has_section_at_zero
)
14655 complaint (&symfile_complaints
,
14656 _(".debug_ranges entry has start address of zero"
14657 " [in module %s]"), objfile_name (objfile
));
14661 callback (range_beginning
, range_end
);
14667 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14668 Return 1 if the attributes are present and valid, otherwise, return 0.
14669 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14672 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14673 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14674 struct partial_symtab
*ranges_pst
)
14676 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14677 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14678 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14679 SECT_OFF_TEXT (objfile
));
14682 CORE_ADDR high
= 0;
14685 retval
= dwarf2_ranges_process (offset
, cu
,
14686 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14688 if (ranges_pst
!= NULL
)
14693 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14694 range_beginning
+ baseaddr
);
14695 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14696 range_end
+ baseaddr
);
14697 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14701 /* FIXME: This is recording everything as a low-high
14702 segment of consecutive addresses. We should have a
14703 data structure for discontiguous block ranges
14707 low
= range_beginning
;
14713 if (range_beginning
< low
)
14714 low
= range_beginning
;
14715 if (range_end
> high
)
14723 /* If the first entry is an end-of-list marker, the range
14724 describes an empty scope, i.e. no instructions. */
14730 *high_return
= high
;
14734 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14735 definition for the return value. *LOWPC and *HIGHPC are set iff
14736 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14738 static enum pc_bounds_kind
14739 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14740 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14741 struct partial_symtab
*pst
)
14743 struct dwarf2_per_objfile
*dwarf2_per_objfile
14744 = cu
->per_cu
->dwarf2_per_objfile
;
14745 struct attribute
*attr
;
14746 struct attribute
*attr_high
;
14748 CORE_ADDR high
= 0;
14749 enum pc_bounds_kind ret
;
14751 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14754 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14757 low
= attr_value_as_address (attr
);
14758 high
= attr_value_as_address (attr_high
);
14759 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14763 /* Found high w/o low attribute. */
14764 return PC_BOUNDS_INVALID
;
14766 /* Found consecutive range of addresses. */
14767 ret
= PC_BOUNDS_HIGH_LOW
;
14771 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14774 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14775 We take advantage of the fact that DW_AT_ranges does not appear
14776 in DW_TAG_compile_unit of DWO files. */
14777 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14778 unsigned int ranges_offset
= (DW_UNSND (attr
)
14779 + (need_ranges_base
14783 /* Value of the DW_AT_ranges attribute is the offset in the
14784 .debug_ranges section. */
14785 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14786 return PC_BOUNDS_INVALID
;
14787 /* Found discontinuous range of addresses. */
14788 ret
= PC_BOUNDS_RANGES
;
14791 return PC_BOUNDS_NOT_PRESENT
;
14794 /* read_partial_die has also the strict LOW < HIGH requirement. */
14796 return PC_BOUNDS_INVALID
;
14798 /* When using the GNU linker, .gnu.linkonce. sections are used to
14799 eliminate duplicate copies of functions and vtables and such.
14800 The linker will arbitrarily choose one and discard the others.
14801 The AT_*_pc values for such functions refer to local labels in
14802 these sections. If the section from that file was discarded, the
14803 labels are not in the output, so the relocs get a value of 0.
14804 If this is a discarded function, mark the pc bounds as invalid,
14805 so that GDB will ignore it. */
14806 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14807 return PC_BOUNDS_INVALID
;
14815 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14816 its low and high PC addresses. Do nothing if these addresses could not
14817 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14818 and HIGHPC to the high address if greater than HIGHPC. */
14821 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14822 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14823 struct dwarf2_cu
*cu
)
14825 CORE_ADDR low
, high
;
14826 struct die_info
*child
= die
->child
;
14828 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14830 *lowpc
= std::min (*lowpc
, low
);
14831 *highpc
= std::max (*highpc
, high
);
14834 /* If the language does not allow nested subprograms (either inside
14835 subprograms or lexical blocks), we're done. */
14836 if (cu
->language
!= language_ada
)
14839 /* Check all the children of the given DIE. If it contains nested
14840 subprograms, then check their pc bounds. Likewise, we need to
14841 check lexical blocks as well, as they may also contain subprogram
14843 while (child
&& child
->tag
)
14845 if (child
->tag
== DW_TAG_subprogram
14846 || child
->tag
== DW_TAG_lexical_block
)
14847 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14848 child
= sibling_die (child
);
14852 /* Get the low and high pc's represented by the scope DIE, and store
14853 them in *LOWPC and *HIGHPC. If the correct values can't be
14854 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14857 get_scope_pc_bounds (struct die_info
*die
,
14858 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14859 struct dwarf2_cu
*cu
)
14861 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14862 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14863 CORE_ADDR current_low
, current_high
;
14865 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14866 >= PC_BOUNDS_RANGES
)
14868 best_low
= current_low
;
14869 best_high
= current_high
;
14873 struct die_info
*child
= die
->child
;
14875 while (child
&& child
->tag
)
14877 switch (child
->tag
) {
14878 case DW_TAG_subprogram
:
14879 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14881 case DW_TAG_namespace
:
14882 case DW_TAG_module
:
14883 /* FIXME: carlton/2004-01-16: Should we do this for
14884 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14885 that current GCC's always emit the DIEs corresponding
14886 to definitions of methods of classes as children of a
14887 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14888 the DIEs giving the declarations, which could be
14889 anywhere). But I don't see any reason why the
14890 standards says that they have to be there. */
14891 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14893 if (current_low
!= ((CORE_ADDR
) -1))
14895 best_low
= std::min (best_low
, current_low
);
14896 best_high
= std::max (best_high
, current_high
);
14904 child
= sibling_die (child
);
14909 *highpc
= best_high
;
14912 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14916 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14917 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14919 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14920 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14921 struct attribute
*attr
;
14922 struct attribute
*attr_high
;
14924 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14927 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14930 CORE_ADDR low
= attr_value_as_address (attr
);
14931 CORE_ADDR high
= attr_value_as_address (attr_high
);
14933 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14936 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14937 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14938 record_block_range (block
, low
, high
- 1);
14942 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14945 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14946 We take advantage of the fact that DW_AT_ranges does not appear
14947 in DW_TAG_compile_unit of DWO files. */
14948 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14950 /* The value of the DW_AT_ranges attribute is the offset of the
14951 address range list in the .debug_ranges section. */
14952 unsigned long offset
= (DW_UNSND (attr
)
14953 + (need_ranges_base
? cu
->ranges_base
: 0));
14954 const gdb_byte
*buffer
;
14956 /* For some target architectures, but not others, the
14957 read_address function sign-extends the addresses it returns.
14958 To recognize base address selection entries, we need a
14960 unsigned int addr_size
= cu
->header
.addr_size
;
14961 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14963 /* The base address, to which the next pair is relative. Note
14964 that this 'base' is a DWARF concept: most entries in a range
14965 list are relative, to reduce the number of relocs against the
14966 debugging information. This is separate from this function's
14967 'baseaddr' argument, which GDB uses to relocate debugging
14968 information from a shared library based on the address at
14969 which the library was loaded. */
14970 CORE_ADDR base
= cu
->base_address
;
14971 int base_known
= cu
->base_known
;
14973 dwarf2_ranges_process (offset
, cu
,
14974 [&] (CORE_ADDR start
, CORE_ADDR end
)
14978 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14979 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14980 record_block_range (block
, start
, end
- 1);
14985 /* Check whether the producer field indicates either of GCC < 4.6, or the
14986 Intel C/C++ compiler, and cache the result in CU. */
14989 check_producer (struct dwarf2_cu
*cu
)
14993 if (cu
->producer
== NULL
)
14995 /* For unknown compilers expect their behavior is DWARF version
14998 GCC started to support .debug_types sections by -gdwarf-4 since
14999 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
15000 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
15001 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
15002 interpreted incorrectly by GDB now - GCC PR debug/48229. */
15004 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
15006 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
15007 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
15009 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
15010 cu
->producer_is_icc_lt_14
= major
< 14;
15013 /* For other non-GCC compilers, expect their behavior is DWARF version
15017 cu
->checked_producer
= 1;
15020 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
15021 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
15022 during 4.6.0 experimental. */
15025 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
15027 if (!cu
->checked_producer
)
15028 check_producer (cu
);
15030 return cu
->producer_is_gxx_lt_4_6
;
15033 /* Return the default accessibility type if it is not overriden by
15034 DW_AT_accessibility. */
15036 static enum dwarf_access_attribute
15037 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
15039 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
15041 /* The default DWARF 2 accessibility for members is public, the default
15042 accessibility for inheritance is private. */
15044 if (die
->tag
!= DW_TAG_inheritance
)
15045 return DW_ACCESS_public
;
15047 return DW_ACCESS_private
;
15051 /* DWARF 3+ defines the default accessibility a different way. The same
15052 rules apply now for DW_TAG_inheritance as for the members and it only
15053 depends on the container kind. */
15055 if (die
->parent
->tag
== DW_TAG_class_type
)
15056 return DW_ACCESS_private
;
15058 return DW_ACCESS_public
;
15062 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
15063 offset. If the attribute was not found return 0, otherwise return
15064 1. If it was found but could not properly be handled, set *OFFSET
15068 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
15071 struct attribute
*attr
;
15073 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
15078 /* Note that we do not check for a section offset first here.
15079 This is because DW_AT_data_member_location is new in DWARF 4,
15080 so if we see it, we can assume that a constant form is really
15081 a constant and not a section offset. */
15082 if (attr_form_is_constant (attr
))
15083 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
15084 else if (attr_form_is_section_offset (attr
))
15085 dwarf2_complex_location_expr_complaint ();
15086 else if (attr_form_is_block (attr
))
15087 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15089 dwarf2_complex_location_expr_complaint ();
15097 /* Add an aggregate field to the field list. */
15100 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15101 struct dwarf2_cu
*cu
)
15103 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15104 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15105 struct nextfield
*new_field
;
15106 struct attribute
*attr
;
15108 const char *fieldname
= "";
15110 /* Allocate a new field list entry and link it in. */
15111 new_field
= XNEW (struct nextfield
);
15112 make_cleanup (xfree
, new_field
);
15113 memset (new_field
, 0, sizeof (struct nextfield
));
15115 if (die
->tag
== DW_TAG_inheritance
)
15117 new_field
->next
= fip
->baseclasses
;
15118 fip
->baseclasses
= new_field
;
15122 new_field
->next
= fip
->fields
;
15123 fip
->fields
= new_field
;
15127 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15129 new_field
->accessibility
= DW_UNSND (attr
);
15131 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15132 if (new_field
->accessibility
!= DW_ACCESS_public
)
15133 fip
->non_public_fields
= 1;
15135 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15137 new_field
->virtuality
= DW_UNSND (attr
);
15139 new_field
->virtuality
= DW_VIRTUALITY_none
;
15141 fp
= &new_field
->field
;
15143 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15147 /* Data member other than a C++ static data member. */
15149 /* Get type of field. */
15150 fp
->type
= die_type (die
, cu
);
15152 SET_FIELD_BITPOS (*fp
, 0);
15154 /* Get bit size of field (zero if none). */
15155 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15158 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15162 FIELD_BITSIZE (*fp
) = 0;
15165 /* Get bit offset of field. */
15166 if (handle_data_member_location (die
, cu
, &offset
))
15167 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15168 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15171 if (gdbarch_bits_big_endian (gdbarch
))
15173 /* For big endian bits, the DW_AT_bit_offset gives the
15174 additional bit offset from the MSB of the containing
15175 anonymous object to the MSB of the field. We don't
15176 have to do anything special since we don't need to
15177 know the size of the anonymous object. */
15178 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15182 /* For little endian bits, compute the bit offset to the
15183 MSB of the anonymous object, subtract off the number of
15184 bits from the MSB of the field to the MSB of the
15185 object, and then subtract off the number of bits of
15186 the field itself. The result is the bit offset of
15187 the LSB of the field. */
15188 int anonymous_size
;
15189 int bit_offset
= DW_UNSND (attr
);
15191 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15194 /* The size of the anonymous object containing
15195 the bit field is explicit, so use the
15196 indicated size (in bytes). */
15197 anonymous_size
= DW_UNSND (attr
);
15201 /* The size of the anonymous object containing
15202 the bit field must be inferred from the type
15203 attribute of the data member containing the
15205 anonymous_size
= TYPE_LENGTH (fp
->type
);
15207 SET_FIELD_BITPOS (*fp
,
15208 (FIELD_BITPOS (*fp
)
15209 + anonymous_size
* bits_per_byte
15210 - bit_offset
- FIELD_BITSIZE (*fp
)));
15213 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15215 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15216 + dwarf2_get_attr_constant_value (attr
, 0)));
15218 /* Get name of field. */
15219 fieldname
= dwarf2_name (die
, cu
);
15220 if (fieldname
== NULL
)
15223 /* The name is already allocated along with this objfile, so we don't
15224 need to duplicate it for the type. */
15225 fp
->name
= fieldname
;
15227 /* Change accessibility for artificial fields (e.g. virtual table
15228 pointer or virtual base class pointer) to private. */
15229 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15231 FIELD_ARTIFICIAL (*fp
) = 1;
15232 new_field
->accessibility
= DW_ACCESS_private
;
15233 fip
->non_public_fields
= 1;
15236 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15238 /* C++ static member. */
15240 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15241 is a declaration, but all versions of G++ as of this writing
15242 (so through at least 3.2.1) incorrectly generate
15243 DW_TAG_variable tags. */
15245 const char *physname
;
15247 /* Get name of field. */
15248 fieldname
= dwarf2_name (die
, cu
);
15249 if (fieldname
== NULL
)
15252 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15254 /* Only create a symbol if this is an external value.
15255 new_symbol checks this and puts the value in the global symbol
15256 table, which we want. If it is not external, new_symbol
15257 will try to put the value in cu->list_in_scope which is wrong. */
15258 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15260 /* A static const member, not much different than an enum as far as
15261 we're concerned, except that we can support more types. */
15262 new_symbol (die
, NULL
, cu
);
15265 /* Get physical name. */
15266 physname
= dwarf2_physname (fieldname
, die
, cu
);
15268 /* The name is already allocated along with this objfile, so we don't
15269 need to duplicate it for the type. */
15270 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15271 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15272 FIELD_NAME (*fp
) = fieldname
;
15274 else if (die
->tag
== DW_TAG_inheritance
)
15278 /* C++ base class field. */
15279 if (handle_data_member_location (die
, cu
, &offset
))
15280 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15281 FIELD_BITSIZE (*fp
) = 0;
15282 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15283 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15284 fip
->nbaseclasses
++;
15288 /* Can the type given by DIE define another type? */
15291 type_can_define_types (const struct die_info
*die
)
15295 case DW_TAG_typedef
:
15296 case DW_TAG_class_type
:
15297 case DW_TAG_structure_type
:
15298 case DW_TAG_union_type
:
15299 case DW_TAG_enumeration_type
:
15307 /* Add a type definition defined in the scope of the FIP's class. */
15310 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15311 struct dwarf2_cu
*cu
)
15313 struct decl_field_list
*new_field
;
15314 struct decl_field
*fp
;
15316 /* Allocate a new field list entry and link it in. */
15317 new_field
= XCNEW (struct decl_field_list
);
15318 make_cleanup (xfree
, new_field
);
15320 gdb_assert (type_can_define_types (die
));
15322 fp
= &new_field
->field
;
15324 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15325 fp
->name
= dwarf2_name (die
, cu
);
15326 fp
->type
= read_type_die (die
, cu
);
15328 /* Save accessibility. */
15329 enum dwarf_access_attribute accessibility
;
15330 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15332 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15334 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15335 switch (accessibility
)
15337 case DW_ACCESS_public
:
15338 /* The assumed value if neither private nor protected. */
15340 case DW_ACCESS_private
:
15341 fp
->is_private
= 1;
15343 case DW_ACCESS_protected
:
15344 fp
->is_protected
= 1;
15347 complaint (&symfile_complaints
,
15348 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15351 if (die
->tag
== DW_TAG_typedef
)
15353 new_field
->next
= fip
->typedef_field_list
;
15354 fip
->typedef_field_list
= new_field
;
15355 fip
->typedef_field_list_count
++;
15359 new_field
->next
= fip
->nested_types_list
;
15360 fip
->nested_types_list
= new_field
;
15361 fip
->nested_types_list_count
++;
15365 /* Create the vector of fields, and attach it to the type. */
15368 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15369 struct dwarf2_cu
*cu
)
15371 int nfields
= fip
->nfields
;
15373 /* Record the field count, allocate space for the array of fields,
15374 and create blank accessibility bitfields if necessary. */
15375 TYPE_NFIELDS (type
) = nfields
;
15376 TYPE_FIELDS (type
) = (struct field
*)
15377 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
15378 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
15380 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15382 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15384 TYPE_FIELD_PRIVATE_BITS (type
) =
15385 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15386 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15388 TYPE_FIELD_PROTECTED_BITS (type
) =
15389 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15390 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15392 TYPE_FIELD_IGNORE_BITS (type
) =
15393 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15394 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15397 /* If the type has baseclasses, allocate and clear a bit vector for
15398 TYPE_FIELD_VIRTUAL_BITS. */
15399 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
15401 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
15402 unsigned char *pointer
;
15404 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15405 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15406 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15407 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
15408 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
15411 /* Copy the saved-up fields into the field vector. Start from the head of
15412 the list, adding to the tail of the field array, so that they end up in
15413 the same order in the array in which they were added to the list. */
15414 while (nfields
-- > 0)
15416 struct nextfield
*fieldp
;
15420 fieldp
= fip
->fields
;
15421 fip
->fields
= fieldp
->next
;
15425 fieldp
= fip
->baseclasses
;
15426 fip
->baseclasses
= fieldp
->next
;
15429 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
15430 switch (fieldp
->accessibility
)
15432 case DW_ACCESS_private
:
15433 if (cu
->language
!= language_ada
)
15434 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
15437 case DW_ACCESS_protected
:
15438 if (cu
->language
!= language_ada
)
15439 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
15442 case DW_ACCESS_public
:
15446 /* Unknown accessibility. Complain and treat it as public. */
15448 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15449 fieldp
->accessibility
);
15453 if (nfields
< fip
->nbaseclasses
)
15455 switch (fieldp
->virtuality
)
15457 case DW_VIRTUALITY_virtual
:
15458 case DW_VIRTUALITY_pure_virtual
:
15459 if (cu
->language
== language_ada
)
15460 error (_("unexpected virtuality in component of Ada type"));
15461 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
15468 /* Return true if this member function is a constructor, false
15472 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15474 const char *fieldname
;
15475 const char *type_name
;
15478 if (die
->parent
== NULL
)
15481 if (die
->parent
->tag
!= DW_TAG_structure_type
15482 && die
->parent
->tag
!= DW_TAG_union_type
15483 && die
->parent
->tag
!= DW_TAG_class_type
)
15486 fieldname
= dwarf2_name (die
, cu
);
15487 type_name
= dwarf2_name (die
->parent
, cu
);
15488 if (fieldname
== NULL
|| type_name
== NULL
)
15491 len
= strlen (fieldname
);
15492 return (strncmp (fieldname
, type_name
, len
) == 0
15493 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15496 /* Add a member function to the proper fieldlist. */
15499 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15500 struct type
*type
, struct dwarf2_cu
*cu
)
15502 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15503 struct attribute
*attr
;
15504 struct fnfieldlist
*flp
;
15506 struct fn_field
*fnp
;
15507 const char *fieldname
;
15508 struct nextfnfield
*new_fnfield
;
15509 struct type
*this_type
;
15510 enum dwarf_access_attribute accessibility
;
15512 if (cu
->language
== language_ada
)
15513 error (_("unexpected member function in Ada type"));
15515 /* Get name of member function. */
15516 fieldname
= dwarf2_name (die
, cu
);
15517 if (fieldname
== NULL
)
15520 /* Look up member function name in fieldlist. */
15521 for (i
= 0; i
< fip
->nfnfields
; i
++)
15523 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15527 /* Create new list element if necessary. */
15528 if (i
< fip
->nfnfields
)
15529 flp
= &fip
->fnfieldlists
[i
];
15532 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
15534 fip
->fnfieldlists
= (struct fnfieldlist
*)
15535 xrealloc (fip
->fnfieldlists
,
15536 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
15537 * sizeof (struct fnfieldlist
));
15538 if (fip
->nfnfields
== 0)
15539 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
15541 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
15542 flp
->name
= fieldname
;
15545 i
= fip
->nfnfields
++;
15548 /* Create a new member function field and chain it to the field list
15550 new_fnfield
= XNEW (struct nextfnfield
);
15551 make_cleanup (xfree
, new_fnfield
);
15552 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
15553 new_fnfield
->next
= flp
->head
;
15554 flp
->head
= new_fnfield
;
15557 /* Fill in the member function field info. */
15558 fnp
= &new_fnfield
->fnfield
;
15560 /* Delay processing of the physname until later. */
15561 if (cu
->language
== language_cplus
)
15563 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
15568 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15569 fnp
->physname
= physname
? physname
: "";
15572 fnp
->type
= alloc_type (objfile
);
15573 this_type
= read_type_die (die
, cu
);
15574 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15576 int nparams
= TYPE_NFIELDS (this_type
);
15578 /* TYPE is the domain of this method, and THIS_TYPE is the type
15579 of the method itself (TYPE_CODE_METHOD). */
15580 smash_to_method_type (fnp
->type
, type
,
15581 TYPE_TARGET_TYPE (this_type
),
15582 TYPE_FIELDS (this_type
),
15583 TYPE_NFIELDS (this_type
),
15584 TYPE_VARARGS (this_type
));
15586 /* Handle static member functions.
15587 Dwarf2 has no clean way to discern C++ static and non-static
15588 member functions. G++ helps GDB by marking the first
15589 parameter for non-static member functions (which is the this
15590 pointer) as artificial. We obtain this information from
15591 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15592 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15593 fnp
->voffset
= VOFFSET_STATIC
;
15596 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15597 dwarf2_full_name (fieldname
, die
, cu
));
15599 /* Get fcontext from DW_AT_containing_type if present. */
15600 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15601 fnp
->fcontext
= die_containing_type (die
, cu
);
15603 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15604 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15606 /* Get accessibility. */
15607 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15609 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15611 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15612 switch (accessibility
)
15614 case DW_ACCESS_private
:
15615 fnp
->is_private
= 1;
15617 case DW_ACCESS_protected
:
15618 fnp
->is_protected
= 1;
15622 /* Check for artificial methods. */
15623 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15624 if (attr
&& DW_UNSND (attr
) != 0)
15625 fnp
->is_artificial
= 1;
15627 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15629 /* Get index in virtual function table if it is a virtual member
15630 function. For older versions of GCC, this is an offset in the
15631 appropriate virtual table, as specified by DW_AT_containing_type.
15632 For everyone else, it is an expression to be evaluated relative
15633 to the object address. */
15635 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15638 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15640 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15642 /* Old-style GCC. */
15643 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15645 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15646 || (DW_BLOCK (attr
)->size
> 1
15647 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15648 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15650 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15651 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15652 dwarf2_complex_location_expr_complaint ();
15654 fnp
->voffset
/= cu
->header
.addr_size
;
15658 dwarf2_complex_location_expr_complaint ();
15660 if (!fnp
->fcontext
)
15662 /* If there is no `this' field and no DW_AT_containing_type,
15663 we cannot actually find a base class context for the
15665 if (TYPE_NFIELDS (this_type
) == 0
15666 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15668 complaint (&symfile_complaints
,
15669 _("cannot determine context for virtual member "
15670 "function \"%s\" (offset %d)"),
15671 fieldname
, to_underlying (die
->sect_off
));
15676 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15680 else if (attr_form_is_section_offset (attr
))
15682 dwarf2_complex_location_expr_complaint ();
15686 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15692 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15693 if (attr
&& DW_UNSND (attr
))
15695 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15696 complaint (&symfile_complaints
,
15697 _("Member function \"%s\" (offset %d) is virtual "
15698 "but the vtable offset is not specified"),
15699 fieldname
, to_underlying (die
->sect_off
));
15700 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15701 TYPE_CPLUS_DYNAMIC (type
) = 1;
15706 /* Create the vector of member function fields, and attach it to the type. */
15709 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15710 struct dwarf2_cu
*cu
)
15712 struct fnfieldlist
*flp
;
15715 if (cu
->language
== language_ada
)
15716 error (_("unexpected member functions in Ada type"));
15718 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15719 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15720 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
15722 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
15724 struct nextfnfield
*nfp
= flp
->head
;
15725 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15728 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
15729 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
15730 fn_flp
->fn_fields
= (struct fn_field
*)
15731 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
15732 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
15733 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
15736 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
15739 /* Returns non-zero if NAME is the name of a vtable member in CU's
15740 language, zero otherwise. */
15742 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15744 static const char vptr
[] = "_vptr";
15746 /* Look for the C++ form of the vtable. */
15747 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15753 /* GCC outputs unnamed structures that are really pointers to member
15754 functions, with the ABI-specified layout. If TYPE describes
15755 such a structure, smash it into a member function type.
15757 GCC shouldn't do this; it should just output pointer to member DIEs.
15758 This is GCC PR debug/28767. */
15761 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15763 struct type
*pfn_type
, *self_type
, *new_type
;
15765 /* Check for a structure with no name and two children. */
15766 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15769 /* Check for __pfn and __delta members. */
15770 if (TYPE_FIELD_NAME (type
, 0) == NULL
15771 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15772 || TYPE_FIELD_NAME (type
, 1) == NULL
15773 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15776 /* Find the type of the method. */
15777 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15778 if (pfn_type
== NULL
15779 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15780 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15783 /* Look for the "this" argument. */
15784 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15785 if (TYPE_NFIELDS (pfn_type
) == 0
15786 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15787 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15790 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15791 new_type
= alloc_type (objfile
);
15792 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15793 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15794 TYPE_VARARGS (pfn_type
));
15795 smash_to_methodptr_type (type
, new_type
);
15799 /* Called when we find the DIE that starts a structure or union scope
15800 (definition) to create a type for the structure or union. Fill in
15801 the type's name and general properties; the members will not be
15802 processed until process_structure_scope. A symbol table entry for
15803 the type will also not be done until process_structure_scope (assuming
15804 the type has a name).
15806 NOTE: we need to call these functions regardless of whether or not the
15807 DIE has a DW_AT_name attribute, since it might be an anonymous
15808 structure or union. This gets the type entered into our set of
15809 user defined types. */
15811 static struct type
*
15812 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15814 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15816 struct attribute
*attr
;
15819 /* If the definition of this type lives in .debug_types, read that type.
15820 Don't follow DW_AT_specification though, that will take us back up
15821 the chain and we want to go down. */
15822 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15825 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15827 /* The type's CU may not be the same as CU.
15828 Ensure TYPE is recorded with CU in die_type_hash. */
15829 return set_die_type (die
, type
, cu
);
15832 type
= alloc_type (objfile
);
15833 INIT_CPLUS_SPECIFIC (type
);
15835 name
= dwarf2_name (die
, cu
);
15838 if (cu
->language
== language_cplus
15839 || cu
->language
== language_d
15840 || cu
->language
== language_rust
)
15842 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15844 /* dwarf2_full_name might have already finished building the DIE's
15845 type. If so, there is no need to continue. */
15846 if (get_die_type (die
, cu
) != NULL
)
15847 return get_die_type (die
, cu
);
15849 TYPE_TAG_NAME (type
) = full_name
;
15850 if (die
->tag
== DW_TAG_structure_type
15851 || die
->tag
== DW_TAG_class_type
)
15852 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15856 /* The name is already allocated along with this objfile, so
15857 we don't need to duplicate it for the type. */
15858 TYPE_TAG_NAME (type
) = name
;
15859 if (die
->tag
== DW_TAG_class_type
)
15860 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15864 if (die
->tag
== DW_TAG_structure_type
)
15866 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15868 else if (die
->tag
== DW_TAG_union_type
)
15870 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15874 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15877 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15878 TYPE_DECLARED_CLASS (type
) = 1;
15880 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15883 if (attr_form_is_constant (attr
))
15884 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15887 /* For the moment, dynamic type sizes are not supported
15888 by GDB's struct type. The actual size is determined
15889 on-demand when resolving the type of a given object,
15890 so set the type's length to zero for now. Otherwise,
15891 we record an expression as the length, and that expression
15892 could lead to a very large value, which could eventually
15893 lead to us trying to allocate that much memory when creating
15894 a value of that type. */
15895 TYPE_LENGTH (type
) = 0;
15900 TYPE_LENGTH (type
) = 0;
15903 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15905 /* ICC<14 does not output the required DW_AT_declaration on
15906 incomplete types, but gives them a size of zero. */
15907 TYPE_STUB (type
) = 1;
15910 TYPE_STUB_SUPPORTED (type
) = 1;
15912 if (die_is_declaration (die
, cu
))
15913 TYPE_STUB (type
) = 1;
15914 else if (attr
== NULL
&& die
->child
== NULL
15915 && producer_is_realview (cu
->producer
))
15916 /* RealView does not output the required DW_AT_declaration
15917 on incomplete types. */
15918 TYPE_STUB (type
) = 1;
15920 /* We need to add the type field to the die immediately so we don't
15921 infinitely recurse when dealing with pointers to the structure
15922 type within the structure itself. */
15923 set_die_type (die
, type
, cu
);
15925 /* set_die_type should be already done. */
15926 set_descriptive_type (type
, die
, cu
);
15931 /* Finish creating a structure or union type, including filling in
15932 its members and creating a symbol for it. */
15935 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15937 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15938 struct die_info
*child_die
;
15941 type
= get_die_type (die
, cu
);
15943 type
= read_structure_type (die
, cu
);
15945 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15947 struct field_info fi
;
15948 std::vector
<struct symbol
*> template_args
;
15949 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
15951 memset (&fi
, 0, sizeof (struct field_info
));
15953 child_die
= die
->child
;
15955 while (child_die
&& child_die
->tag
)
15957 if (child_die
->tag
== DW_TAG_member
15958 || child_die
->tag
== DW_TAG_variable
)
15960 /* NOTE: carlton/2002-11-05: A C++ static data member
15961 should be a DW_TAG_member that is a declaration, but
15962 all versions of G++ as of this writing (so through at
15963 least 3.2.1) incorrectly generate DW_TAG_variable
15964 tags for them instead. */
15965 dwarf2_add_field (&fi
, child_die
, cu
);
15967 else if (child_die
->tag
== DW_TAG_subprogram
)
15969 /* Rust doesn't have member functions in the C++ sense.
15970 However, it does emit ordinary functions as children
15971 of a struct DIE. */
15972 if (cu
->language
== language_rust
)
15973 read_func_scope (child_die
, cu
);
15976 /* C++ member function. */
15977 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
15980 else if (child_die
->tag
== DW_TAG_inheritance
)
15982 /* C++ base class field. */
15983 dwarf2_add_field (&fi
, child_die
, cu
);
15985 else if (type_can_define_types (child_die
))
15986 dwarf2_add_type_defn (&fi
, child_die
, cu
);
15987 else if (child_die
->tag
== DW_TAG_template_type_param
15988 || child_die
->tag
== DW_TAG_template_value_param
)
15990 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15993 template_args
.push_back (arg
);
15996 child_die
= sibling_die (child_die
);
15999 /* Attach template arguments to type. */
16000 if (!template_args
.empty ())
16002 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16003 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16004 TYPE_TEMPLATE_ARGUMENTS (type
)
16005 = XOBNEWVEC (&objfile
->objfile_obstack
,
16007 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16008 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16009 template_args
.data (),
16010 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16011 * sizeof (struct symbol
*)));
16014 /* Attach fields and member functions to the type. */
16016 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16019 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16021 /* Get the type which refers to the base class (possibly this
16022 class itself) which contains the vtable pointer for the current
16023 class from the DW_AT_containing_type attribute. This use of
16024 DW_AT_containing_type is a GNU extension. */
16026 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16028 struct type
*t
= die_containing_type (die
, cu
);
16030 set_type_vptr_basetype (type
, t
);
16035 /* Our own class provides vtbl ptr. */
16036 for (i
= TYPE_NFIELDS (t
) - 1;
16037 i
>= TYPE_N_BASECLASSES (t
);
16040 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16042 if (is_vtable_name (fieldname
, cu
))
16044 set_type_vptr_fieldno (type
, i
);
16049 /* Complain if virtual function table field not found. */
16050 if (i
< TYPE_N_BASECLASSES (t
))
16051 complaint (&symfile_complaints
,
16052 _("virtual function table pointer "
16053 "not found when defining class '%s'"),
16054 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
16059 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16062 else if (cu
->producer
16063 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16065 /* The IBM XLC compiler does not provide direct indication
16066 of the containing type, but the vtable pointer is
16067 always named __vfp. */
16071 for (i
= TYPE_NFIELDS (type
) - 1;
16072 i
>= TYPE_N_BASECLASSES (type
);
16075 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16077 set_type_vptr_fieldno (type
, i
);
16078 set_type_vptr_basetype (type
, type
);
16085 /* Copy fi.typedef_field_list linked list elements content into the
16086 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16087 if (fi
.typedef_field_list
)
16089 int i
= fi
.typedef_field_list_count
;
16091 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16092 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16093 = ((struct decl_field
*)
16094 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
16095 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
16097 /* Reverse the list order to keep the debug info elements order. */
16100 struct decl_field
*dest
, *src
;
16102 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
16103 src
= &fi
.typedef_field_list
->field
;
16104 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
16109 /* Copy fi.nested_types_list linked list elements content into the
16110 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16111 if (fi
.nested_types_list
!= NULL
&& cu
->language
!= language_ada
)
16113 int i
= fi
.nested_types_list_count
;
16115 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16116 TYPE_NESTED_TYPES_ARRAY (type
)
16117 = ((struct decl_field
*)
16118 TYPE_ALLOC (type
, sizeof (struct decl_field
) * i
));
16119 TYPE_NESTED_TYPES_COUNT (type
) = i
;
16121 /* Reverse the list order to keep the debug info elements order. */
16124 struct decl_field
*dest
, *src
;
16126 dest
= &TYPE_NESTED_TYPES_FIELD (type
, i
);
16127 src
= &fi
.nested_types_list
->field
;
16128 fi
.nested_types_list
= fi
.nested_types_list
->next
;
16133 do_cleanups (back_to
);
16136 quirk_gcc_member_function_pointer (type
, objfile
);
16138 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16139 snapshots) has been known to create a die giving a declaration
16140 for a class that has, as a child, a die giving a definition for a
16141 nested class. So we have to process our children even if the
16142 current die is a declaration. Normally, of course, a declaration
16143 won't have any children at all. */
16145 child_die
= die
->child
;
16147 while (child_die
!= NULL
&& child_die
->tag
)
16149 if (child_die
->tag
== DW_TAG_member
16150 || child_die
->tag
== DW_TAG_variable
16151 || child_die
->tag
== DW_TAG_inheritance
16152 || child_die
->tag
== DW_TAG_template_value_param
16153 || child_die
->tag
== DW_TAG_template_type_param
)
16158 process_die (child_die
, cu
);
16160 child_die
= sibling_die (child_die
);
16163 /* Do not consider external references. According to the DWARF standard,
16164 these DIEs are identified by the fact that they have no byte_size
16165 attribute, and a declaration attribute. */
16166 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16167 || !die_is_declaration (die
, cu
))
16168 new_symbol (die
, type
, cu
);
16171 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16172 update TYPE using some information only available in DIE's children. */
16175 update_enumeration_type_from_children (struct die_info
*die
,
16177 struct dwarf2_cu
*cu
)
16179 struct die_info
*child_die
;
16180 int unsigned_enum
= 1;
16184 auto_obstack obstack
;
16186 for (child_die
= die
->child
;
16187 child_die
!= NULL
&& child_die
->tag
;
16188 child_die
= sibling_die (child_die
))
16190 struct attribute
*attr
;
16192 const gdb_byte
*bytes
;
16193 struct dwarf2_locexpr_baton
*baton
;
16196 if (child_die
->tag
!= DW_TAG_enumerator
)
16199 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16203 name
= dwarf2_name (child_die
, cu
);
16205 name
= "<anonymous enumerator>";
16207 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16208 &value
, &bytes
, &baton
);
16214 else if ((mask
& value
) != 0)
16219 /* If we already know that the enum type is neither unsigned, nor
16220 a flag type, no need to look at the rest of the enumerates. */
16221 if (!unsigned_enum
&& !flag_enum
)
16226 TYPE_UNSIGNED (type
) = 1;
16228 TYPE_FLAG_ENUM (type
) = 1;
16231 /* Given a DW_AT_enumeration_type die, set its type. We do not
16232 complete the type's fields yet, or create any symbols. */
16234 static struct type
*
16235 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16237 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16239 struct attribute
*attr
;
16242 /* If the definition of this type lives in .debug_types, read that type.
16243 Don't follow DW_AT_specification though, that will take us back up
16244 the chain and we want to go down. */
16245 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16248 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16250 /* The type's CU may not be the same as CU.
16251 Ensure TYPE is recorded with CU in die_type_hash. */
16252 return set_die_type (die
, type
, cu
);
16255 type
= alloc_type (objfile
);
16257 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16258 name
= dwarf2_full_name (NULL
, die
, cu
);
16260 TYPE_TAG_NAME (type
) = name
;
16262 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16265 struct type
*underlying_type
= die_type (die
, cu
);
16267 TYPE_TARGET_TYPE (type
) = underlying_type
;
16270 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16273 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16277 TYPE_LENGTH (type
) = 0;
16280 /* The enumeration DIE can be incomplete. In Ada, any type can be
16281 declared as private in the package spec, and then defined only
16282 inside the package body. Such types are known as Taft Amendment
16283 Types. When another package uses such a type, an incomplete DIE
16284 may be generated by the compiler. */
16285 if (die_is_declaration (die
, cu
))
16286 TYPE_STUB (type
) = 1;
16288 /* Finish the creation of this type by using the enum's children.
16289 We must call this even when the underlying type has been provided
16290 so that we can determine if we're looking at a "flag" enum. */
16291 update_enumeration_type_from_children (die
, type
, cu
);
16293 /* If this type has an underlying type that is not a stub, then we
16294 may use its attributes. We always use the "unsigned" attribute
16295 in this situation, because ordinarily we guess whether the type
16296 is unsigned -- but the guess can be wrong and the underlying type
16297 can tell us the reality. However, we defer to a local size
16298 attribute if one exists, because this lets the compiler override
16299 the underlying type if needed. */
16300 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16302 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16303 if (TYPE_LENGTH (type
) == 0)
16304 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16307 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16309 return set_die_type (die
, type
, cu
);
16312 /* Given a pointer to a die which begins an enumeration, process all
16313 the dies that define the members of the enumeration, and create the
16314 symbol for the enumeration type.
16316 NOTE: We reverse the order of the element list. */
16319 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16321 struct type
*this_type
;
16323 this_type
= get_die_type (die
, cu
);
16324 if (this_type
== NULL
)
16325 this_type
= read_enumeration_type (die
, cu
);
16327 if (die
->child
!= NULL
)
16329 struct die_info
*child_die
;
16330 struct symbol
*sym
;
16331 struct field
*fields
= NULL
;
16332 int num_fields
= 0;
16335 child_die
= die
->child
;
16336 while (child_die
&& child_die
->tag
)
16338 if (child_die
->tag
!= DW_TAG_enumerator
)
16340 process_die (child_die
, cu
);
16344 name
= dwarf2_name (child_die
, cu
);
16347 sym
= new_symbol (child_die
, this_type
, cu
);
16349 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16351 fields
= (struct field
*)
16353 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16354 * sizeof (struct field
));
16357 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16358 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16359 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16360 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16366 child_die
= sibling_die (child_die
);
16371 TYPE_NFIELDS (this_type
) = num_fields
;
16372 TYPE_FIELDS (this_type
) = (struct field
*)
16373 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16374 memcpy (TYPE_FIELDS (this_type
), fields
,
16375 sizeof (struct field
) * num_fields
);
16380 /* If we are reading an enum from a .debug_types unit, and the enum
16381 is a declaration, and the enum is not the signatured type in the
16382 unit, then we do not want to add a symbol for it. Adding a
16383 symbol would in some cases obscure the true definition of the
16384 enum, giving users an incomplete type when the definition is
16385 actually available. Note that we do not want to do this for all
16386 enums which are just declarations, because C++0x allows forward
16387 enum declarations. */
16388 if (cu
->per_cu
->is_debug_types
16389 && die_is_declaration (die
, cu
))
16391 struct signatured_type
*sig_type
;
16393 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16394 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16395 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16399 new_symbol (die
, this_type
, cu
);
16402 /* Extract all information from a DW_TAG_array_type DIE and put it in
16403 the DIE's type field. For now, this only handles one dimensional
16406 static struct type
*
16407 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16409 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16410 struct die_info
*child_die
;
16412 struct type
*element_type
, *range_type
, *index_type
;
16413 struct attribute
*attr
;
16415 struct dynamic_prop
*byte_stride_prop
= NULL
;
16416 unsigned int bit_stride
= 0;
16418 element_type
= die_type (die
, cu
);
16420 /* The die_type call above may have already set the type for this DIE. */
16421 type
= get_die_type (die
, cu
);
16425 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16431 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16432 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16435 complaint (&symfile_complaints
,
16436 _("unable to read array DW_AT_byte_stride "
16437 " - DIE at 0x%x [in module %s]"),
16438 to_underlying (die
->sect_off
),
16439 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16440 /* Ignore this attribute. We will likely not be able to print
16441 arrays of this type correctly, but there is little we can do
16442 to help if we cannot read the attribute's value. */
16443 byte_stride_prop
= NULL
;
16447 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16449 bit_stride
= DW_UNSND (attr
);
16451 /* Irix 6.2 native cc creates array types without children for
16452 arrays with unspecified length. */
16453 if (die
->child
== NULL
)
16455 index_type
= objfile_type (objfile
)->builtin_int
;
16456 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16457 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16458 byte_stride_prop
, bit_stride
);
16459 return set_die_type (die
, type
, cu
);
16462 std::vector
<struct type
*> range_types
;
16463 child_die
= die
->child
;
16464 while (child_die
&& child_die
->tag
)
16466 if (child_die
->tag
== DW_TAG_subrange_type
)
16468 struct type
*child_type
= read_type_die (child_die
, cu
);
16470 if (child_type
!= NULL
)
16472 /* The range type was succesfully read. Save it for the
16473 array type creation. */
16474 range_types
.push_back (child_type
);
16477 child_die
= sibling_die (child_die
);
16480 /* Dwarf2 dimensions are output from left to right, create the
16481 necessary array types in backwards order. */
16483 type
= element_type
;
16485 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16489 while (i
< range_types
.size ())
16490 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16491 byte_stride_prop
, bit_stride
);
16495 size_t ndim
= range_types
.size ();
16497 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16498 byte_stride_prop
, bit_stride
);
16501 /* Understand Dwarf2 support for vector types (like they occur on
16502 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16503 array type. This is not part of the Dwarf2/3 standard yet, but a
16504 custom vendor extension. The main difference between a regular
16505 array and the vector variant is that vectors are passed by value
16507 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16509 make_vector_type (type
);
16511 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16512 implementation may choose to implement triple vectors using this
16514 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16517 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16518 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16520 complaint (&symfile_complaints
,
16521 _("DW_AT_byte_size for array type smaller "
16522 "than the total size of elements"));
16525 name
= dwarf2_name (die
, cu
);
16527 TYPE_NAME (type
) = name
;
16529 /* Install the type in the die. */
16530 set_die_type (die
, type
, cu
);
16532 /* set_die_type should be already done. */
16533 set_descriptive_type (type
, die
, cu
);
16538 static enum dwarf_array_dim_ordering
16539 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16541 struct attribute
*attr
;
16543 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16546 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16548 /* GNU F77 is a special case, as at 08/2004 array type info is the
16549 opposite order to the dwarf2 specification, but data is still
16550 laid out as per normal fortran.
16552 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16553 version checking. */
16555 if (cu
->language
== language_fortran
16556 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16558 return DW_ORD_row_major
;
16561 switch (cu
->language_defn
->la_array_ordering
)
16563 case array_column_major
:
16564 return DW_ORD_col_major
;
16565 case array_row_major
:
16567 return DW_ORD_row_major
;
16571 /* Extract all information from a DW_TAG_set_type DIE and put it in
16572 the DIE's type field. */
16574 static struct type
*
16575 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16577 struct type
*domain_type
, *set_type
;
16578 struct attribute
*attr
;
16580 domain_type
= die_type (die
, cu
);
16582 /* The die_type call above may have already set the type for this DIE. */
16583 set_type
= get_die_type (die
, cu
);
16587 set_type
= create_set_type (NULL
, domain_type
);
16589 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16591 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16593 return set_die_type (die
, set_type
, cu
);
16596 /* A helper for read_common_block that creates a locexpr baton.
16597 SYM is the symbol which we are marking as computed.
16598 COMMON_DIE is the DIE for the common block.
16599 COMMON_LOC is the location expression attribute for the common
16601 MEMBER_LOC is the location expression attribute for the particular
16602 member of the common block that we are processing.
16603 CU is the CU from which the above come. */
16606 mark_common_block_symbol_computed (struct symbol
*sym
,
16607 struct die_info
*common_die
,
16608 struct attribute
*common_loc
,
16609 struct attribute
*member_loc
,
16610 struct dwarf2_cu
*cu
)
16612 struct dwarf2_per_objfile
*dwarf2_per_objfile
16613 = cu
->per_cu
->dwarf2_per_objfile
;
16614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16615 struct dwarf2_locexpr_baton
*baton
;
16617 unsigned int cu_off
;
16618 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16619 LONGEST offset
= 0;
16621 gdb_assert (common_loc
&& member_loc
);
16622 gdb_assert (attr_form_is_block (common_loc
));
16623 gdb_assert (attr_form_is_block (member_loc
)
16624 || attr_form_is_constant (member_loc
));
16626 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16627 baton
->per_cu
= cu
->per_cu
;
16628 gdb_assert (baton
->per_cu
);
16630 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16632 if (attr_form_is_constant (member_loc
))
16634 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16635 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16638 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16640 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16643 *ptr
++ = DW_OP_call4
;
16644 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16645 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16648 if (attr_form_is_constant (member_loc
))
16650 *ptr
++ = DW_OP_addr
;
16651 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16652 ptr
+= cu
->header
.addr_size
;
16656 /* We have to copy the data here, because DW_OP_call4 will only
16657 use a DW_AT_location attribute. */
16658 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16659 ptr
+= DW_BLOCK (member_loc
)->size
;
16662 *ptr
++ = DW_OP_plus
;
16663 gdb_assert (ptr
- baton
->data
== baton
->size
);
16665 SYMBOL_LOCATION_BATON (sym
) = baton
;
16666 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16669 /* Create appropriate locally-scoped variables for all the
16670 DW_TAG_common_block entries. Also create a struct common_block
16671 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16672 is used to sepate the common blocks name namespace from regular
16676 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16678 struct attribute
*attr
;
16680 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16683 /* Support the .debug_loc offsets. */
16684 if (attr_form_is_block (attr
))
16688 else if (attr_form_is_section_offset (attr
))
16690 dwarf2_complex_location_expr_complaint ();
16695 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16696 "common block member");
16701 if (die
->child
!= NULL
)
16703 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16704 struct die_info
*child_die
;
16705 size_t n_entries
= 0, size
;
16706 struct common_block
*common_block
;
16707 struct symbol
*sym
;
16709 for (child_die
= die
->child
;
16710 child_die
&& child_die
->tag
;
16711 child_die
= sibling_die (child_die
))
16714 size
= (sizeof (struct common_block
)
16715 + (n_entries
- 1) * sizeof (struct symbol
*));
16717 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16719 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16720 common_block
->n_entries
= 0;
16722 for (child_die
= die
->child
;
16723 child_die
&& child_die
->tag
;
16724 child_die
= sibling_die (child_die
))
16726 /* Create the symbol in the DW_TAG_common_block block in the current
16728 sym
= new_symbol (child_die
, NULL
, cu
);
16731 struct attribute
*member_loc
;
16733 common_block
->contents
[common_block
->n_entries
++] = sym
;
16735 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16739 /* GDB has handled this for a long time, but it is
16740 not specified by DWARF. It seems to have been
16741 emitted by gfortran at least as recently as:
16742 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16743 complaint (&symfile_complaints
,
16744 _("Variable in common block has "
16745 "DW_AT_data_member_location "
16746 "- DIE at 0x%x [in module %s]"),
16747 to_underlying (child_die
->sect_off
),
16748 objfile_name (objfile
));
16750 if (attr_form_is_section_offset (member_loc
))
16751 dwarf2_complex_location_expr_complaint ();
16752 else if (attr_form_is_constant (member_loc
)
16753 || attr_form_is_block (member_loc
))
16756 mark_common_block_symbol_computed (sym
, die
, attr
,
16760 dwarf2_complex_location_expr_complaint ();
16765 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16766 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16770 /* Create a type for a C++ namespace. */
16772 static struct type
*
16773 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16775 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16776 const char *previous_prefix
, *name
;
16780 /* For extensions, reuse the type of the original namespace. */
16781 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16783 struct die_info
*ext_die
;
16784 struct dwarf2_cu
*ext_cu
= cu
;
16786 ext_die
= dwarf2_extension (die
, &ext_cu
);
16787 type
= read_type_die (ext_die
, ext_cu
);
16789 /* EXT_CU may not be the same as CU.
16790 Ensure TYPE is recorded with CU in die_type_hash. */
16791 return set_die_type (die
, type
, cu
);
16794 name
= namespace_name (die
, &is_anonymous
, cu
);
16796 /* Now build the name of the current namespace. */
16798 previous_prefix
= determine_prefix (die
, cu
);
16799 if (previous_prefix
[0] != '\0')
16800 name
= typename_concat (&objfile
->objfile_obstack
,
16801 previous_prefix
, name
, 0, cu
);
16803 /* Create the type. */
16804 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16805 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16807 return set_die_type (die
, type
, cu
);
16810 /* Read a namespace scope. */
16813 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16815 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16818 /* Add a symbol associated to this if we haven't seen the namespace
16819 before. Also, add a using directive if it's an anonymous
16822 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16826 type
= read_type_die (die
, cu
);
16827 new_symbol (die
, type
, cu
);
16829 namespace_name (die
, &is_anonymous
, cu
);
16832 const char *previous_prefix
= determine_prefix (die
, cu
);
16834 std::vector
<const char *> excludes
;
16835 add_using_directive (using_directives (cu
->language
),
16836 previous_prefix
, TYPE_NAME (type
), NULL
,
16837 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16841 if (die
->child
!= NULL
)
16843 struct die_info
*child_die
= die
->child
;
16845 while (child_die
&& child_die
->tag
)
16847 process_die (child_die
, cu
);
16848 child_die
= sibling_die (child_die
);
16853 /* Read a Fortran module as type. This DIE can be only a declaration used for
16854 imported module. Still we need that type as local Fortran "use ... only"
16855 declaration imports depend on the created type in determine_prefix. */
16857 static struct type
*
16858 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16860 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16861 const char *module_name
;
16864 module_name
= dwarf2_name (die
, cu
);
16866 complaint (&symfile_complaints
,
16867 _("DW_TAG_module has no name, offset 0x%x"),
16868 to_underlying (die
->sect_off
));
16869 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16871 /* determine_prefix uses TYPE_TAG_NAME. */
16872 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16874 return set_die_type (die
, type
, cu
);
16877 /* Read a Fortran module. */
16880 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16882 struct die_info
*child_die
= die
->child
;
16885 type
= read_type_die (die
, cu
);
16886 new_symbol (die
, type
, cu
);
16888 while (child_die
&& child_die
->tag
)
16890 process_die (child_die
, cu
);
16891 child_die
= sibling_die (child_die
);
16895 /* Return the name of the namespace represented by DIE. Set
16896 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16899 static const char *
16900 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16902 struct die_info
*current_die
;
16903 const char *name
= NULL
;
16905 /* Loop through the extensions until we find a name. */
16907 for (current_die
= die
;
16908 current_die
!= NULL
;
16909 current_die
= dwarf2_extension (die
, &cu
))
16911 /* We don't use dwarf2_name here so that we can detect the absence
16912 of a name -> anonymous namespace. */
16913 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16919 /* Is it an anonymous namespace? */
16921 *is_anonymous
= (name
== NULL
);
16923 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16928 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16929 the user defined type vector. */
16931 static struct type
*
16932 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16934 struct gdbarch
*gdbarch
16935 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16936 struct comp_unit_head
*cu_header
= &cu
->header
;
16938 struct attribute
*attr_byte_size
;
16939 struct attribute
*attr_address_class
;
16940 int byte_size
, addr_class
;
16941 struct type
*target_type
;
16943 target_type
= die_type (die
, cu
);
16945 /* The die_type call above may have already set the type for this DIE. */
16946 type
= get_die_type (die
, cu
);
16950 type
= lookup_pointer_type (target_type
);
16952 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16953 if (attr_byte_size
)
16954 byte_size
= DW_UNSND (attr_byte_size
);
16956 byte_size
= cu_header
->addr_size
;
16958 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16959 if (attr_address_class
)
16960 addr_class
= DW_UNSND (attr_address_class
);
16962 addr_class
= DW_ADDR_none
;
16964 /* If the pointer size or address class is different than the
16965 default, create a type variant marked as such and set the
16966 length accordingly. */
16967 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
16969 if (gdbarch_address_class_type_flags_p (gdbarch
))
16973 type_flags
= gdbarch_address_class_type_flags
16974 (gdbarch
, byte_size
, addr_class
);
16975 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16977 type
= make_type_with_address_space (type
, type_flags
);
16979 else if (TYPE_LENGTH (type
) != byte_size
)
16981 complaint (&symfile_complaints
,
16982 _("invalid pointer size %d"), byte_size
);
16986 /* Should we also complain about unhandled address classes? */
16990 TYPE_LENGTH (type
) = byte_size
;
16991 return set_die_type (die
, type
, cu
);
16994 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16995 the user defined type vector. */
16997 static struct type
*
16998 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17001 struct type
*to_type
;
17002 struct type
*domain
;
17004 to_type
= die_type (die
, cu
);
17005 domain
= die_containing_type (die
, cu
);
17007 /* The calls above may have already set the type for this DIE. */
17008 type
= get_die_type (die
, cu
);
17012 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17013 type
= lookup_methodptr_type (to_type
);
17014 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17016 struct type
*new_type
17017 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17019 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17020 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17021 TYPE_VARARGS (to_type
));
17022 type
= lookup_methodptr_type (new_type
);
17025 type
= lookup_memberptr_type (to_type
, domain
);
17027 return set_die_type (die
, type
, cu
);
17030 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17031 the user defined type vector. */
17033 static struct type
*
17034 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17035 enum type_code refcode
)
17037 struct comp_unit_head
*cu_header
= &cu
->header
;
17038 struct type
*type
, *target_type
;
17039 struct attribute
*attr
;
17041 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17043 target_type
= die_type (die
, cu
);
17045 /* The die_type call above may have already set the type for this DIE. */
17046 type
= get_die_type (die
, cu
);
17050 type
= lookup_reference_type (target_type
, refcode
);
17051 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17054 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17058 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17060 return set_die_type (die
, type
, cu
);
17063 /* Add the given cv-qualifiers to the element type of the array. GCC
17064 outputs DWARF type qualifiers that apply to an array, not the
17065 element type. But GDB relies on the array element type to carry
17066 the cv-qualifiers. This mimics section 6.7.3 of the C99
17069 static struct type
*
17070 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17071 struct type
*base_type
, int cnst
, int voltl
)
17073 struct type
*el_type
, *inner_array
;
17075 base_type
= copy_type (base_type
);
17076 inner_array
= base_type
;
17078 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17080 TYPE_TARGET_TYPE (inner_array
) =
17081 copy_type (TYPE_TARGET_TYPE (inner_array
));
17082 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17085 el_type
= TYPE_TARGET_TYPE (inner_array
);
17086 cnst
|= TYPE_CONST (el_type
);
17087 voltl
|= TYPE_VOLATILE (el_type
);
17088 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17090 return set_die_type (die
, base_type
, cu
);
17093 static struct type
*
17094 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17096 struct type
*base_type
, *cv_type
;
17098 base_type
= die_type (die
, cu
);
17100 /* The die_type call above may have already set the type for this DIE. */
17101 cv_type
= get_die_type (die
, cu
);
17105 /* In case the const qualifier is applied to an array type, the element type
17106 is so qualified, not the array type (section 6.7.3 of C99). */
17107 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17108 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17110 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17111 return set_die_type (die
, cv_type
, cu
);
17114 static struct type
*
17115 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17117 struct type
*base_type
, *cv_type
;
17119 base_type
= die_type (die
, cu
);
17121 /* The die_type call above may have already set the type for this DIE. */
17122 cv_type
= get_die_type (die
, cu
);
17126 /* In case the volatile qualifier is applied to an array type, the
17127 element type is so qualified, not the array type (section 6.7.3
17129 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17130 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17132 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17133 return set_die_type (die
, cv_type
, cu
);
17136 /* Handle DW_TAG_restrict_type. */
17138 static struct type
*
17139 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17141 struct type
*base_type
, *cv_type
;
17143 base_type
= die_type (die
, cu
);
17145 /* The die_type call above may have already set the type for this DIE. */
17146 cv_type
= get_die_type (die
, cu
);
17150 cv_type
= make_restrict_type (base_type
);
17151 return set_die_type (die
, cv_type
, cu
);
17154 /* Handle DW_TAG_atomic_type. */
17156 static struct type
*
17157 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17159 struct type
*base_type
, *cv_type
;
17161 base_type
= die_type (die
, cu
);
17163 /* The die_type call above may have already set the type for this DIE. */
17164 cv_type
= get_die_type (die
, cu
);
17168 cv_type
= make_atomic_type (base_type
);
17169 return set_die_type (die
, cv_type
, cu
);
17172 /* Extract all information from a DW_TAG_string_type DIE and add to
17173 the user defined type vector. It isn't really a user defined type,
17174 but it behaves like one, with other DIE's using an AT_user_def_type
17175 attribute to reference it. */
17177 static struct type
*
17178 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17180 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17181 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17182 struct type
*type
, *range_type
, *index_type
, *char_type
;
17183 struct attribute
*attr
;
17184 unsigned int length
;
17186 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17189 length
= DW_UNSND (attr
);
17193 /* Check for the DW_AT_byte_size attribute. */
17194 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17197 length
= DW_UNSND (attr
);
17205 index_type
= objfile_type (objfile
)->builtin_int
;
17206 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17207 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17208 type
= create_string_type (NULL
, char_type
, range_type
);
17210 return set_die_type (die
, type
, cu
);
17213 /* Assuming that DIE corresponds to a function, returns nonzero
17214 if the function is prototyped. */
17217 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17219 struct attribute
*attr
;
17221 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17222 if (attr
&& (DW_UNSND (attr
) != 0))
17225 /* The DWARF standard implies that the DW_AT_prototyped attribute
17226 is only meaninful for C, but the concept also extends to other
17227 languages that allow unprototyped functions (Eg: Objective C).
17228 For all other languages, assume that functions are always
17230 if (cu
->language
!= language_c
17231 && cu
->language
!= language_objc
17232 && cu
->language
!= language_opencl
)
17235 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17236 prototyped and unprototyped functions; default to prototyped,
17237 since that is more common in modern code (and RealView warns
17238 about unprototyped functions). */
17239 if (producer_is_realview (cu
->producer
))
17245 /* Handle DIES due to C code like:
17249 int (*funcp)(int a, long l);
17253 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17255 static struct type
*
17256 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17258 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17259 struct type
*type
; /* Type that this function returns. */
17260 struct type
*ftype
; /* Function that returns above type. */
17261 struct attribute
*attr
;
17263 type
= die_type (die
, cu
);
17265 /* The die_type call above may have already set the type for this DIE. */
17266 ftype
= get_die_type (die
, cu
);
17270 ftype
= lookup_function_type (type
);
17272 if (prototyped_function_p (die
, cu
))
17273 TYPE_PROTOTYPED (ftype
) = 1;
17275 /* Store the calling convention in the type if it's available in
17276 the subroutine die. Otherwise set the calling convention to
17277 the default value DW_CC_normal. */
17278 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17280 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17281 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17282 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17284 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17286 /* Record whether the function returns normally to its caller or not
17287 if the DWARF producer set that information. */
17288 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17289 if (attr
&& (DW_UNSND (attr
) != 0))
17290 TYPE_NO_RETURN (ftype
) = 1;
17292 /* We need to add the subroutine type to the die immediately so
17293 we don't infinitely recurse when dealing with parameters
17294 declared as the same subroutine type. */
17295 set_die_type (die
, ftype
, cu
);
17297 if (die
->child
!= NULL
)
17299 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17300 struct die_info
*child_die
;
17301 int nparams
, iparams
;
17303 /* Count the number of parameters.
17304 FIXME: GDB currently ignores vararg functions, but knows about
17305 vararg member functions. */
17307 child_die
= die
->child
;
17308 while (child_die
&& child_die
->tag
)
17310 if (child_die
->tag
== DW_TAG_formal_parameter
)
17312 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17313 TYPE_VARARGS (ftype
) = 1;
17314 child_die
= sibling_die (child_die
);
17317 /* Allocate storage for parameters and fill them in. */
17318 TYPE_NFIELDS (ftype
) = nparams
;
17319 TYPE_FIELDS (ftype
) = (struct field
*)
17320 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17322 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17323 even if we error out during the parameters reading below. */
17324 for (iparams
= 0; iparams
< nparams
; iparams
++)
17325 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17328 child_die
= die
->child
;
17329 while (child_die
&& child_die
->tag
)
17331 if (child_die
->tag
== DW_TAG_formal_parameter
)
17333 struct type
*arg_type
;
17335 /* DWARF version 2 has no clean way to discern C++
17336 static and non-static member functions. G++ helps
17337 GDB by marking the first parameter for non-static
17338 member functions (which is the this pointer) as
17339 artificial. We pass this information to
17340 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17342 DWARF version 3 added DW_AT_object_pointer, which GCC
17343 4.5 does not yet generate. */
17344 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17346 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17348 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17349 arg_type
= die_type (child_die
, cu
);
17351 /* RealView does not mark THIS as const, which the testsuite
17352 expects. GCC marks THIS as const in method definitions,
17353 but not in the class specifications (GCC PR 43053). */
17354 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17355 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17358 struct dwarf2_cu
*arg_cu
= cu
;
17359 const char *name
= dwarf2_name (child_die
, cu
);
17361 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17364 /* If the compiler emits this, use it. */
17365 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17368 else if (name
&& strcmp (name
, "this") == 0)
17369 /* Function definitions will have the argument names. */
17371 else if (name
== NULL
&& iparams
== 0)
17372 /* Declarations may not have the names, so like
17373 elsewhere in GDB, assume an artificial first
17374 argument is "this". */
17378 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17382 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17385 child_die
= sibling_die (child_die
);
17392 static struct type
*
17393 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17395 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17396 const char *name
= NULL
;
17397 struct type
*this_type
, *target_type
;
17399 name
= dwarf2_full_name (NULL
, die
, cu
);
17400 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17401 TYPE_TARGET_STUB (this_type
) = 1;
17402 set_die_type (die
, this_type
, cu
);
17403 target_type
= die_type (die
, cu
);
17404 if (target_type
!= this_type
)
17405 TYPE_TARGET_TYPE (this_type
) = target_type
;
17408 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17409 spec and cause infinite loops in GDB. */
17410 complaint (&symfile_complaints
,
17411 _("Self-referential DW_TAG_typedef "
17412 "- DIE at 0x%x [in module %s]"),
17413 to_underlying (die
->sect_off
), objfile_name (objfile
));
17414 TYPE_TARGET_TYPE (this_type
) = NULL
;
17419 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17420 (which may be different from NAME) to the architecture back-end to allow
17421 it to guess the correct format if necessary. */
17423 static struct type
*
17424 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17425 const char *name_hint
)
17427 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17428 const struct floatformat
**format
;
17431 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17433 type
= init_float_type (objfile
, bits
, name
, format
);
17435 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17440 /* Find a representation of a given base type and install
17441 it in the TYPE field of the die. */
17443 static struct type
*
17444 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17446 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17448 struct attribute
*attr
;
17449 int encoding
= 0, bits
= 0;
17452 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17455 encoding
= DW_UNSND (attr
);
17457 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17460 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17462 name
= dwarf2_name (die
, cu
);
17465 complaint (&symfile_complaints
,
17466 _("DW_AT_name missing from DW_TAG_base_type"));
17471 case DW_ATE_address
:
17472 /* Turn DW_ATE_address into a void * pointer. */
17473 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17474 type
= init_pointer_type (objfile
, bits
, name
, type
);
17476 case DW_ATE_boolean
:
17477 type
= init_boolean_type (objfile
, bits
, 1, name
);
17479 case DW_ATE_complex_float
:
17480 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17481 type
= init_complex_type (objfile
, name
, type
);
17483 case DW_ATE_decimal_float
:
17484 type
= init_decfloat_type (objfile
, bits
, name
);
17487 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17489 case DW_ATE_signed
:
17490 type
= init_integer_type (objfile
, bits
, 0, name
);
17492 case DW_ATE_unsigned
:
17493 if (cu
->language
== language_fortran
17495 && startswith (name
, "character("))
17496 type
= init_character_type (objfile
, bits
, 1, name
);
17498 type
= init_integer_type (objfile
, bits
, 1, name
);
17500 case DW_ATE_signed_char
:
17501 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17502 || cu
->language
== language_pascal
17503 || cu
->language
== language_fortran
)
17504 type
= init_character_type (objfile
, bits
, 0, name
);
17506 type
= init_integer_type (objfile
, bits
, 0, name
);
17508 case DW_ATE_unsigned_char
:
17509 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17510 || cu
->language
== language_pascal
17511 || cu
->language
== language_fortran
17512 || cu
->language
== language_rust
)
17513 type
= init_character_type (objfile
, bits
, 1, name
);
17515 type
= init_integer_type (objfile
, bits
, 1, name
);
17519 gdbarch
*arch
= get_objfile_arch (objfile
);
17522 type
= builtin_type (arch
)->builtin_char16
;
17523 else if (bits
== 32)
17524 type
= builtin_type (arch
)->builtin_char32
;
17527 complaint (&symfile_complaints
,
17528 _("unsupported DW_ATE_UTF bit size: '%d'"),
17530 type
= init_integer_type (objfile
, bits
, 1, name
);
17532 return set_die_type (die
, type
, cu
);
17537 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17538 dwarf_type_encoding_name (encoding
));
17539 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17543 if (name
&& strcmp (name
, "char") == 0)
17544 TYPE_NOSIGN (type
) = 1;
17546 return set_die_type (die
, type
, cu
);
17549 /* Parse dwarf attribute if it's a block, reference or constant and put the
17550 resulting value of the attribute into struct bound_prop.
17551 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17554 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17555 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17557 struct dwarf2_property_baton
*baton
;
17558 struct obstack
*obstack
17559 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17561 if (attr
== NULL
|| prop
== NULL
)
17564 if (attr_form_is_block (attr
))
17566 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17567 baton
->referenced_type
= NULL
;
17568 baton
->locexpr
.per_cu
= cu
->per_cu
;
17569 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17570 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17571 prop
->data
.baton
= baton
;
17572 prop
->kind
= PROP_LOCEXPR
;
17573 gdb_assert (prop
->data
.baton
!= NULL
);
17575 else if (attr_form_is_ref (attr
))
17577 struct dwarf2_cu
*target_cu
= cu
;
17578 struct die_info
*target_die
;
17579 struct attribute
*target_attr
;
17581 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17582 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17583 if (target_attr
== NULL
)
17584 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17586 if (target_attr
== NULL
)
17589 switch (target_attr
->name
)
17591 case DW_AT_location
:
17592 if (attr_form_is_section_offset (target_attr
))
17594 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17595 baton
->referenced_type
= die_type (target_die
, target_cu
);
17596 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17597 prop
->data
.baton
= baton
;
17598 prop
->kind
= PROP_LOCLIST
;
17599 gdb_assert (prop
->data
.baton
!= NULL
);
17601 else if (attr_form_is_block (target_attr
))
17603 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17604 baton
->referenced_type
= die_type (target_die
, target_cu
);
17605 baton
->locexpr
.per_cu
= cu
->per_cu
;
17606 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17607 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17608 prop
->data
.baton
= baton
;
17609 prop
->kind
= PROP_LOCEXPR
;
17610 gdb_assert (prop
->data
.baton
!= NULL
);
17614 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17615 "dynamic property");
17619 case DW_AT_data_member_location
:
17623 if (!handle_data_member_location (target_die
, target_cu
,
17627 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17628 baton
->referenced_type
= read_type_die (target_die
->parent
,
17630 baton
->offset_info
.offset
= offset
;
17631 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17632 prop
->data
.baton
= baton
;
17633 prop
->kind
= PROP_ADDR_OFFSET
;
17638 else if (attr_form_is_constant (attr
))
17640 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17641 prop
->kind
= PROP_CONST
;
17645 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17646 dwarf2_name (die
, cu
));
17653 /* Read the given DW_AT_subrange DIE. */
17655 static struct type
*
17656 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17658 struct type
*base_type
, *orig_base_type
;
17659 struct type
*range_type
;
17660 struct attribute
*attr
;
17661 struct dynamic_prop low
, high
;
17662 int low_default_is_valid
;
17663 int high_bound_is_count
= 0;
17665 LONGEST negative_mask
;
17667 orig_base_type
= die_type (die
, cu
);
17668 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17669 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17670 creating the range type, but we use the result of check_typedef
17671 when examining properties of the type. */
17672 base_type
= check_typedef (orig_base_type
);
17674 /* The die_type call above may have already set the type for this DIE. */
17675 range_type
= get_die_type (die
, cu
);
17679 low
.kind
= PROP_CONST
;
17680 high
.kind
= PROP_CONST
;
17681 high
.data
.const_val
= 0;
17683 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17684 omitting DW_AT_lower_bound. */
17685 switch (cu
->language
)
17688 case language_cplus
:
17689 low
.data
.const_val
= 0;
17690 low_default_is_valid
= 1;
17692 case language_fortran
:
17693 low
.data
.const_val
= 1;
17694 low_default_is_valid
= 1;
17697 case language_objc
:
17698 case language_rust
:
17699 low
.data
.const_val
= 0;
17700 low_default_is_valid
= (cu
->header
.version
>= 4);
17704 case language_pascal
:
17705 low
.data
.const_val
= 1;
17706 low_default_is_valid
= (cu
->header
.version
>= 4);
17709 low
.data
.const_val
= 0;
17710 low_default_is_valid
= 0;
17714 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17716 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17717 else if (!low_default_is_valid
)
17718 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17719 "- DIE at 0x%x [in module %s]"),
17720 to_underlying (die
->sect_off
),
17721 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17723 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17724 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17726 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17727 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17729 /* If bounds are constant do the final calculation here. */
17730 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17731 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17733 high_bound_is_count
= 1;
17737 /* Dwarf-2 specifications explicitly allows to create subrange types
17738 without specifying a base type.
17739 In that case, the base type must be set to the type of
17740 the lower bound, upper bound or count, in that order, if any of these
17741 three attributes references an object that has a type.
17742 If no base type is found, the Dwarf-2 specifications say that
17743 a signed integer type of size equal to the size of an address should
17745 For the following C code: `extern char gdb_int [];'
17746 GCC produces an empty range DIE.
17747 FIXME: muller/2010-05-28: Possible references to object for low bound,
17748 high bound or count are not yet handled by this code. */
17749 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17751 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17752 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17753 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17754 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17756 /* Test "int", "long int", and "long long int" objfile types,
17757 and select the first one having a size above or equal to the
17758 architecture address size. */
17759 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17760 base_type
= int_type
;
17763 int_type
= objfile_type (objfile
)->builtin_long
;
17764 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17765 base_type
= int_type
;
17768 int_type
= objfile_type (objfile
)->builtin_long_long
;
17769 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17770 base_type
= int_type
;
17775 /* Normally, the DWARF producers are expected to use a signed
17776 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17777 But this is unfortunately not always the case, as witnessed
17778 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17779 is used instead. To work around that ambiguity, we treat
17780 the bounds as signed, and thus sign-extend their values, when
17781 the base type is signed. */
17783 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17784 if (low
.kind
== PROP_CONST
17785 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17786 low
.data
.const_val
|= negative_mask
;
17787 if (high
.kind
== PROP_CONST
17788 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17789 high
.data
.const_val
|= negative_mask
;
17791 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17793 if (high_bound_is_count
)
17794 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17796 /* Ada expects an empty array on no boundary attributes. */
17797 if (attr
== NULL
&& cu
->language
!= language_ada
)
17798 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17800 name
= dwarf2_name (die
, cu
);
17802 TYPE_NAME (range_type
) = name
;
17804 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17806 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17808 set_die_type (die
, range_type
, cu
);
17810 /* set_die_type should be already done. */
17811 set_descriptive_type (range_type
, die
, cu
);
17816 static struct type
*
17817 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17821 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17823 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17825 /* In Ada, an unspecified type is typically used when the description
17826 of the type is defered to a different unit. When encountering
17827 such a type, we treat it as a stub, and try to resolve it later on,
17829 if (cu
->language
== language_ada
)
17830 TYPE_STUB (type
) = 1;
17832 return set_die_type (die
, type
, cu
);
17835 /* Read a single die and all its descendents. Set the die's sibling
17836 field to NULL; set other fields in the die correctly, and set all
17837 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17838 location of the info_ptr after reading all of those dies. PARENT
17839 is the parent of the die in question. */
17841 static struct die_info
*
17842 read_die_and_children (const struct die_reader_specs
*reader
,
17843 const gdb_byte
*info_ptr
,
17844 const gdb_byte
**new_info_ptr
,
17845 struct die_info
*parent
)
17847 struct die_info
*die
;
17848 const gdb_byte
*cur_ptr
;
17851 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17854 *new_info_ptr
= cur_ptr
;
17857 store_in_ref_table (die
, reader
->cu
);
17860 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17864 *new_info_ptr
= cur_ptr
;
17867 die
->sibling
= NULL
;
17868 die
->parent
= parent
;
17872 /* Read a die, all of its descendents, and all of its siblings; set
17873 all of the fields of all of the dies correctly. Arguments are as
17874 in read_die_and_children. */
17876 static struct die_info
*
17877 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17878 const gdb_byte
*info_ptr
,
17879 const gdb_byte
**new_info_ptr
,
17880 struct die_info
*parent
)
17882 struct die_info
*first_die
, *last_sibling
;
17883 const gdb_byte
*cur_ptr
;
17885 cur_ptr
= info_ptr
;
17886 first_die
= last_sibling
= NULL
;
17890 struct die_info
*die
17891 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17895 *new_info_ptr
= cur_ptr
;
17902 last_sibling
->sibling
= die
;
17904 last_sibling
= die
;
17908 /* Read a die, all of its descendents, and all of its siblings; set
17909 all of the fields of all of the dies correctly. Arguments are as
17910 in read_die_and_children.
17911 This the main entry point for reading a DIE and all its children. */
17913 static struct die_info
*
17914 read_die_and_siblings (const struct die_reader_specs
*reader
,
17915 const gdb_byte
*info_ptr
,
17916 const gdb_byte
**new_info_ptr
,
17917 struct die_info
*parent
)
17919 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17920 new_info_ptr
, parent
);
17922 if (dwarf_die_debug
)
17924 fprintf_unfiltered (gdb_stdlog
,
17925 "Read die from %s@0x%x of %s:\n",
17926 get_section_name (reader
->die_section
),
17927 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17928 bfd_get_filename (reader
->abfd
));
17929 dump_die (die
, dwarf_die_debug
);
17935 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17937 The caller is responsible for filling in the extra attributes
17938 and updating (*DIEP)->num_attrs.
17939 Set DIEP to point to a newly allocated die with its information,
17940 except for its child, sibling, and parent fields.
17941 Set HAS_CHILDREN to tell whether the die has children or not. */
17943 static const gdb_byte
*
17944 read_full_die_1 (const struct die_reader_specs
*reader
,
17945 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17946 int *has_children
, int num_extra_attrs
)
17948 unsigned int abbrev_number
, bytes_read
, i
;
17949 struct abbrev_info
*abbrev
;
17950 struct die_info
*die
;
17951 struct dwarf2_cu
*cu
= reader
->cu
;
17952 bfd
*abfd
= reader
->abfd
;
17954 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17955 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17956 info_ptr
+= bytes_read
;
17957 if (!abbrev_number
)
17964 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17966 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17968 bfd_get_filename (abfd
));
17970 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17971 die
->sect_off
= sect_off
;
17972 die
->tag
= abbrev
->tag
;
17973 die
->abbrev
= abbrev_number
;
17975 /* Make the result usable.
17976 The caller needs to update num_attrs after adding the extra
17978 die
->num_attrs
= abbrev
->num_attrs
;
17980 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17981 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17985 *has_children
= abbrev
->has_children
;
17989 /* Read a die and all its attributes.
17990 Set DIEP to point to a newly allocated die with its information,
17991 except for its child, sibling, and parent fields.
17992 Set HAS_CHILDREN to tell whether the die has children or not. */
17994 static const gdb_byte
*
17995 read_full_die (const struct die_reader_specs
*reader
,
17996 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17999 const gdb_byte
*result
;
18001 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18003 if (dwarf_die_debug
)
18005 fprintf_unfiltered (gdb_stdlog
,
18006 "Read die from %s@0x%x of %s:\n",
18007 get_section_name (reader
->die_section
),
18008 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18009 bfd_get_filename (reader
->abfd
));
18010 dump_die (*diep
, dwarf_die_debug
);
18016 /* Abbreviation tables.
18018 In DWARF version 2, the description of the debugging information is
18019 stored in a separate .debug_abbrev section. Before we read any
18020 dies from a section we read in all abbreviations and install them
18021 in a hash table. */
18023 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18025 struct abbrev_info
*
18026 abbrev_table::alloc_abbrev ()
18028 struct abbrev_info
*abbrev
;
18030 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18031 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18036 /* Add an abbreviation to the table. */
18039 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18040 struct abbrev_info
*abbrev
)
18042 unsigned int hash_number
;
18044 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18045 abbrev
->next
= m_abbrevs
[hash_number
];
18046 m_abbrevs
[hash_number
] = abbrev
;
18049 /* Look up an abbrev in the table.
18050 Returns NULL if the abbrev is not found. */
18052 struct abbrev_info
*
18053 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18055 unsigned int hash_number
;
18056 struct abbrev_info
*abbrev
;
18058 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18059 abbrev
= m_abbrevs
[hash_number
];
18063 if (abbrev
->number
== abbrev_number
)
18065 abbrev
= abbrev
->next
;
18070 /* Read in an abbrev table. */
18072 static abbrev_table_up
18073 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18074 struct dwarf2_section_info
*section
,
18075 sect_offset sect_off
)
18077 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18078 bfd
*abfd
= get_section_bfd_owner (section
);
18079 const gdb_byte
*abbrev_ptr
;
18080 struct abbrev_info
*cur_abbrev
;
18081 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18082 unsigned int abbrev_form
;
18083 struct attr_abbrev
*cur_attrs
;
18084 unsigned int allocated_attrs
;
18086 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18088 dwarf2_read_section (objfile
, section
);
18089 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18090 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18091 abbrev_ptr
+= bytes_read
;
18093 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18094 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18096 /* Loop until we reach an abbrev number of 0. */
18097 while (abbrev_number
)
18099 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18101 /* read in abbrev header */
18102 cur_abbrev
->number
= abbrev_number
;
18104 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18105 abbrev_ptr
+= bytes_read
;
18106 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18109 /* now read in declarations */
18112 LONGEST implicit_const
;
18114 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18115 abbrev_ptr
+= bytes_read
;
18116 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18117 abbrev_ptr
+= bytes_read
;
18118 if (abbrev_form
== DW_FORM_implicit_const
)
18120 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18122 abbrev_ptr
+= bytes_read
;
18126 /* Initialize it due to a false compiler warning. */
18127 implicit_const
= -1;
18130 if (abbrev_name
== 0)
18133 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18135 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18137 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18140 cur_attrs
[cur_abbrev
->num_attrs
].name
18141 = (enum dwarf_attribute
) abbrev_name
;
18142 cur_attrs
[cur_abbrev
->num_attrs
].form
18143 = (enum dwarf_form
) abbrev_form
;
18144 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18145 ++cur_abbrev
->num_attrs
;
18148 cur_abbrev
->attrs
=
18149 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18150 cur_abbrev
->num_attrs
);
18151 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18152 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18154 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18156 /* Get next abbreviation.
18157 Under Irix6 the abbreviations for a compilation unit are not
18158 always properly terminated with an abbrev number of 0.
18159 Exit loop if we encounter an abbreviation which we have
18160 already read (which means we are about to read the abbreviations
18161 for the next compile unit) or if the end of the abbreviation
18162 table is reached. */
18163 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18165 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18166 abbrev_ptr
+= bytes_read
;
18167 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18172 return abbrev_table
;
18175 /* Returns nonzero if TAG represents a type that we might generate a partial
18179 is_type_tag_for_partial (int tag
)
18184 /* Some types that would be reasonable to generate partial symbols for,
18185 that we don't at present. */
18186 case DW_TAG_array_type
:
18187 case DW_TAG_file_type
:
18188 case DW_TAG_ptr_to_member_type
:
18189 case DW_TAG_set_type
:
18190 case DW_TAG_string_type
:
18191 case DW_TAG_subroutine_type
:
18193 case DW_TAG_base_type
:
18194 case DW_TAG_class_type
:
18195 case DW_TAG_interface_type
:
18196 case DW_TAG_enumeration_type
:
18197 case DW_TAG_structure_type
:
18198 case DW_TAG_subrange_type
:
18199 case DW_TAG_typedef
:
18200 case DW_TAG_union_type
:
18207 /* Load all DIEs that are interesting for partial symbols into memory. */
18209 static struct partial_die_info
*
18210 load_partial_dies (const struct die_reader_specs
*reader
,
18211 const gdb_byte
*info_ptr
, int building_psymtab
)
18213 struct dwarf2_cu
*cu
= reader
->cu
;
18214 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18215 struct partial_die_info
*part_die
;
18216 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18217 unsigned int bytes_read
;
18218 unsigned int load_all
= 0;
18219 int nesting_level
= 1;
18224 gdb_assert (cu
->per_cu
!= NULL
);
18225 if (cu
->per_cu
->load_all_dies
)
18229 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18233 &cu
->comp_unit_obstack
,
18234 hashtab_obstack_allocate
,
18235 dummy_obstack_deallocate
);
18237 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
18241 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18243 /* A NULL abbrev means the end of a series of children. */
18244 if (abbrev
== NULL
)
18246 if (--nesting_level
== 0)
18248 /* PART_DIE was probably the last thing allocated on the
18249 comp_unit_obstack, so we could call obstack_free
18250 here. We don't do that because the waste is small,
18251 and will be cleaned up when we're done with this
18252 compilation unit. This way, we're also more robust
18253 against other users of the comp_unit_obstack. */
18256 info_ptr
+= bytes_read
;
18257 last_die
= parent_die
;
18258 parent_die
= parent_die
->die_parent
;
18262 /* Check for template arguments. We never save these; if
18263 they're seen, we just mark the parent, and go on our way. */
18264 if (parent_die
!= NULL
18265 && cu
->language
== language_cplus
18266 && (abbrev
->tag
== DW_TAG_template_type_param
18267 || abbrev
->tag
== DW_TAG_template_value_param
))
18269 parent_die
->has_template_arguments
= 1;
18273 /* We don't need a partial DIE for the template argument. */
18274 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18279 /* We only recurse into c++ subprograms looking for template arguments.
18280 Skip their other children. */
18282 && cu
->language
== language_cplus
18283 && parent_die
!= NULL
18284 && parent_die
->tag
== DW_TAG_subprogram
)
18286 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18290 /* Check whether this DIE is interesting enough to save. Normally
18291 we would not be interested in members here, but there may be
18292 later variables referencing them via DW_AT_specification (for
18293 static members). */
18295 && !is_type_tag_for_partial (abbrev
->tag
)
18296 && abbrev
->tag
!= DW_TAG_constant
18297 && abbrev
->tag
!= DW_TAG_enumerator
18298 && abbrev
->tag
!= DW_TAG_subprogram
18299 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18300 && abbrev
->tag
!= DW_TAG_lexical_block
18301 && abbrev
->tag
!= DW_TAG_variable
18302 && abbrev
->tag
!= DW_TAG_namespace
18303 && abbrev
->tag
!= DW_TAG_module
18304 && abbrev
->tag
!= DW_TAG_member
18305 && abbrev
->tag
!= DW_TAG_imported_unit
18306 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18308 /* Otherwise we skip to the next sibling, if any. */
18309 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18313 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
18316 /* This two-pass algorithm for processing partial symbols has a
18317 high cost in cache pressure. Thus, handle some simple cases
18318 here which cover the majority of C partial symbols. DIEs
18319 which neither have specification tags in them, nor could have
18320 specification tags elsewhere pointing at them, can simply be
18321 processed and discarded.
18323 This segment is also optional; scan_partial_symbols and
18324 add_partial_symbol will handle these DIEs if we chain
18325 them in normally. When compilers which do not emit large
18326 quantities of duplicate debug information are more common,
18327 this code can probably be removed. */
18329 /* Any complete simple types at the top level (pretty much all
18330 of them, for a language without namespaces), can be processed
18332 if (parent_die
== NULL
18333 && part_die
->has_specification
== 0
18334 && part_die
->is_declaration
== 0
18335 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
18336 || part_die
->tag
== DW_TAG_base_type
18337 || part_die
->tag
== DW_TAG_subrange_type
))
18339 if (building_psymtab
&& part_die
->name
!= NULL
)
18340 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
18341 VAR_DOMAIN
, LOC_TYPEDEF
,
18342 &objfile
->static_psymbols
,
18343 0, cu
->language
, objfile
);
18344 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
18348 /* The exception for DW_TAG_typedef with has_children above is
18349 a workaround of GCC PR debug/47510. In the case of this complaint
18350 type_name_no_tag_or_error will error on such types later.
18352 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18353 it could not find the child DIEs referenced later, this is checked
18354 above. In correct DWARF DW_TAG_typedef should have no children. */
18356 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
18357 complaint (&symfile_complaints
,
18358 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18359 "- DIE at 0x%x [in module %s]"),
18360 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
18362 /* If we're at the second level, and we're an enumerator, and
18363 our parent has no specification (meaning possibly lives in a
18364 namespace elsewhere), then we can add the partial symbol now
18365 instead of queueing it. */
18366 if (part_die
->tag
== DW_TAG_enumerator
18367 && parent_die
!= NULL
18368 && parent_die
->die_parent
== NULL
18369 && parent_die
->tag
== DW_TAG_enumeration_type
18370 && parent_die
->has_specification
== 0)
18372 if (part_die
->name
== NULL
)
18373 complaint (&symfile_complaints
,
18374 _("malformed enumerator DIE ignored"));
18375 else if (building_psymtab
)
18376 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
18377 VAR_DOMAIN
, LOC_CONST
,
18378 cu
->language
== language_cplus
18379 ? &objfile
->global_psymbols
18380 : &objfile
->static_psymbols
,
18381 0, cu
->language
, objfile
);
18383 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
18387 /* We'll save this DIE so link it in. */
18388 part_die
->die_parent
= parent_die
;
18389 part_die
->die_sibling
= NULL
;
18390 part_die
->die_child
= NULL
;
18392 if (last_die
&& last_die
== parent_die
)
18393 last_die
->die_child
= part_die
;
18395 last_die
->die_sibling
= part_die
;
18397 last_die
= part_die
;
18399 if (first_die
== NULL
)
18400 first_die
= part_die
;
18402 /* Maybe add the DIE to the hash table. Not all DIEs that we
18403 find interesting need to be in the hash table, because we
18404 also have the parent/sibling/child chains; only those that we
18405 might refer to by offset later during partial symbol reading.
18407 For now this means things that might have be the target of a
18408 DW_AT_specification, DW_AT_abstract_origin, or
18409 DW_AT_extension. DW_AT_extension will refer only to
18410 namespaces; DW_AT_abstract_origin refers to functions (and
18411 many things under the function DIE, but we do not recurse
18412 into function DIEs during partial symbol reading) and
18413 possibly variables as well; DW_AT_specification refers to
18414 declarations. Declarations ought to have the DW_AT_declaration
18415 flag. It happens that GCC forgets to put it in sometimes, but
18416 only for functions, not for types.
18418 Adding more things than necessary to the hash table is harmless
18419 except for the performance cost. Adding too few will result in
18420 wasted time in find_partial_die, when we reread the compilation
18421 unit with load_all_dies set. */
18424 || abbrev
->tag
== DW_TAG_constant
18425 || abbrev
->tag
== DW_TAG_subprogram
18426 || abbrev
->tag
== DW_TAG_variable
18427 || abbrev
->tag
== DW_TAG_namespace
18428 || part_die
->is_declaration
)
18432 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18433 to_underlying (part_die
->sect_off
),
18438 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
18440 /* For some DIEs we want to follow their children (if any). For C
18441 we have no reason to follow the children of structures; for other
18442 languages we have to, so that we can get at method physnames
18443 to infer fully qualified class names, for DW_AT_specification,
18444 and for C++ template arguments. For C++, we also look one level
18445 inside functions to find template arguments (if the name of the
18446 function does not already contain the template arguments).
18448 For Ada, we need to scan the children of subprograms and lexical
18449 blocks as well because Ada allows the definition of nested
18450 entities that could be interesting for the debugger, such as
18451 nested subprograms for instance. */
18452 if (last_die
->has_children
18454 || last_die
->tag
== DW_TAG_namespace
18455 || last_die
->tag
== DW_TAG_module
18456 || last_die
->tag
== DW_TAG_enumeration_type
18457 || (cu
->language
== language_cplus
18458 && last_die
->tag
== DW_TAG_subprogram
18459 && (last_die
->name
== NULL
18460 || strchr (last_die
->name
, '<') == NULL
))
18461 || (cu
->language
!= language_c
18462 && (last_die
->tag
== DW_TAG_class_type
18463 || last_die
->tag
== DW_TAG_interface_type
18464 || last_die
->tag
== DW_TAG_structure_type
18465 || last_die
->tag
== DW_TAG_union_type
))
18466 || (cu
->language
== language_ada
18467 && (last_die
->tag
== DW_TAG_subprogram
18468 || last_die
->tag
== DW_TAG_lexical_block
))))
18471 parent_die
= last_die
;
18475 /* Otherwise we skip to the next sibling, if any. */
18476 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18478 /* Back to the top, do it again. */
18482 /* Read a minimal amount of information into the minimal die structure. */
18484 static const gdb_byte
*
18485 read_partial_die (const struct die_reader_specs
*reader
,
18486 struct partial_die_info
*part_die
,
18487 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
18488 const gdb_byte
*info_ptr
)
18490 struct dwarf2_cu
*cu
= reader
->cu
;
18491 struct dwarf2_per_objfile
*dwarf2_per_objfile
18492 = cu
->per_cu
->dwarf2_per_objfile
;
18493 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18494 const gdb_byte
*buffer
= reader
->buffer
;
18496 struct attribute attr
;
18497 int has_low_pc_attr
= 0;
18498 int has_high_pc_attr
= 0;
18499 int high_pc_relative
= 0;
18501 memset (part_die
, 0, sizeof (struct partial_die_info
));
18503 part_die
->sect_off
= (sect_offset
) (info_ptr
- buffer
);
18505 info_ptr
+= abbrev_len
;
18507 if (abbrev
== NULL
)
18510 part_die
->tag
= abbrev
->tag
;
18511 part_die
->has_children
= abbrev
->has_children
;
18513 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18515 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
18517 /* Store the data if it is of an attribute we want to keep in a
18518 partial symbol table. */
18522 switch (part_die
->tag
)
18524 case DW_TAG_compile_unit
:
18525 case DW_TAG_partial_unit
:
18526 case DW_TAG_type_unit
:
18527 /* Compilation units have a DW_AT_name that is a filename, not
18528 a source language identifier. */
18529 case DW_TAG_enumeration_type
:
18530 case DW_TAG_enumerator
:
18531 /* These tags always have simple identifiers already; no need
18532 to canonicalize them. */
18533 part_die
->name
= DW_STRING (&attr
);
18537 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18538 &objfile
->per_bfd
->storage_obstack
);
18542 case DW_AT_linkage_name
:
18543 case DW_AT_MIPS_linkage_name
:
18544 /* Note that both forms of linkage name might appear. We
18545 assume they will be the same, and we only store the last
18547 if (cu
->language
== language_ada
)
18548 part_die
->name
= DW_STRING (&attr
);
18549 part_die
->linkage_name
= DW_STRING (&attr
);
18552 has_low_pc_attr
= 1;
18553 part_die
->lowpc
= attr_value_as_address (&attr
);
18555 case DW_AT_high_pc
:
18556 has_high_pc_attr
= 1;
18557 part_die
->highpc
= attr_value_as_address (&attr
);
18558 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18559 high_pc_relative
= 1;
18561 case DW_AT_location
:
18562 /* Support the .debug_loc offsets. */
18563 if (attr_form_is_block (&attr
))
18565 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
18567 else if (attr_form_is_section_offset (&attr
))
18569 dwarf2_complex_location_expr_complaint ();
18573 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18574 "partial symbol information");
18577 case DW_AT_external
:
18578 part_die
->is_external
= DW_UNSND (&attr
);
18580 case DW_AT_declaration
:
18581 part_die
->is_declaration
= DW_UNSND (&attr
);
18584 part_die
->has_type
= 1;
18586 case DW_AT_abstract_origin
:
18587 case DW_AT_specification
:
18588 case DW_AT_extension
:
18589 part_die
->has_specification
= 1;
18590 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18591 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18592 || cu
->per_cu
->is_dwz
);
18594 case DW_AT_sibling
:
18595 /* Ignore absolute siblings, they might point outside of
18596 the current compile unit. */
18597 if (attr
.form
== DW_FORM_ref_addr
)
18598 complaint (&symfile_complaints
,
18599 _("ignoring absolute DW_AT_sibling"));
18602 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18603 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18605 if (sibling_ptr
< info_ptr
)
18606 complaint (&symfile_complaints
,
18607 _("DW_AT_sibling points backwards"));
18608 else if (sibling_ptr
> reader
->buffer_end
)
18609 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18611 part_die
->sibling
= sibling_ptr
;
18614 case DW_AT_byte_size
:
18615 part_die
->has_byte_size
= 1;
18617 case DW_AT_const_value
:
18618 part_die
->has_const_value
= 1;
18620 case DW_AT_calling_convention
:
18621 /* DWARF doesn't provide a way to identify a program's source-level
18622 entry point. DW_AT_calling_convention attributes are only meant
18623 to describe functions' calling conventions.
18625 However, because it's a necessary piece of information in
18626 Fortran, and before DWARF 4 DW_CC_program was the only
18627 piece of debugging information whose definition refers to
18628 a 'main program' at all, several compilers marked Fortran
18629 main programs with DW_CC_program --- even when those
18630 functions use the standard calling conventions.
18632 Although DWARF now specifies a way to provide this
18633 information, we support this practice for backward
18635 if (DW_UNSND (&attr
) == DW_CC_program
18636 && cu
->language
== language_fortran
)
18637 part_die
->main_subprogram
= 1;
18640 if (DW_UNSND (&attr
) == DW_INL_inlined
18641 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18642 part_die
->may_be_inlined
= 1;
18646 if (part_die
->tag
== DW_TAG_imported_unit
)
18648 part_die
->d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18649 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18650 || cu
->per_cu
->is_dwz
);
18654 case DW_AT_main_subprogram
:
18655 part_die
->main_subprogram
= DW_UNSND (&attr
);
18663 if (high_pc_relative
)
18664 part_die
->highpc
+= part_die
->lowpc
;
18666 if (has_low_pc_attr
&& has_high_pc_attr
)
18668 /* When using the GNU linker, .gnu.linkonce. sections are used to
18669 eliminate duplicate copies of functions and vtables and such.
18670 The linker will arbitrarily choose one and discard the others.
18671 The AT_*_pc values for such functions refer to local labels in
18672 these sections. If the section from that file was discarded, the
18673 labels are not in the output, so the relocs get a value of 0.
18674 If this is a discarded function, mark the pc bounds as invalid,
18675 so that GDB will ignore it. */
18676 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18678 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18680 complaint (&symfile_complaints
,
18681 _("DW_AT_low_pc %s is zero "
18682 "for DIE at 0x%x [in module %s]"),
18683 paddress (gdbarch
, part_die
->lowpc
),
18684 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
18686 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18687 else if (part_die
->lowpc
>= part_die
->highpc
)
18689 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18691 complaint (&symfile_complaints
,
18692 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18693 "for DIE at 0x%x [in module %s]"),
18694 paddress (gdbarch
, part_die
->lowpc
),
18695 paddress (gdbarch
, part_die
->highpc
),
18696 to_underlying (part_die
->sect_off
),
18697 objfile_name (objfile
));
18700 part_die
->has_pc_info
= 1;
18706 /* Find a cached partial DIE at OFFSET in CU. */
18708 static struct partial_die_info
*
18709 find_partial_die_in_comp_unit (sect_offset sect_off
, struct dwarf2_cu
*cu
)
18711 struct partial_die_info
*lookup_die
= NULL
;
18712 struct partial_die_info part_die
;
18714 part_die
.sect_off
= sect_off
;
18715 lookup_die
= ((struct partial_die_info
*)
18716 htab_find_with_hash (cu
->partial_dies
, &part_die
,
18717 to_underlying (sect_off
)));
18722 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18723 except in the case of .debug_types DIEs which do not reference
18724 outside their CU (they do however referencing other types via
18725 DW_FORM_ref_sig8). */
18727 static struct partial_die_info
*
18728 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18730 struct dwarf2_per_objfile
*dwarf2_per_objfile
18731 = cu
->per_cu
->dwarf2_per_objfile
;
18732 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18733 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18734 struct partial_die_info
*pd
= NULL
;
18736 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18737 && offset_in_cu_p (&cu
->header
, sect_off
))
18739 pd
= find_partial_die_in_comp_unit (sect_off
, cu
);
18742 /* We missed recording what we needed.
18743 Load all dies and try again. */
18744 per_cu
= cu
->per_cu
;
18748 /* TUs don't reference other CUs/TUs (except via type signatures). */
18749 if (cu
->per_cu
->is_debug_types
)
18751 error (_("Dwarf Error: Type Unit at offset 0x%x contains"
18752 " external reference to offset 0x%x [in module %s].\n"),
18753 to_underlying (cu
->header
.sect_off
), to_underlying (sect_off
),
18754 bfd_get_filename (objfile
->obfd
));
18756 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18757 dwarf2_per_objfile
);
18759 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18760 load_partial_comp_unit (per_cu
);
18762 per_cu
->cu
->last_used
= 0;
18763 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
18766 /* If we didn't find it, and not all dies have been loaded,
18767 load them all and try again. */
18769 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18771 per_cu
->load_all_dies
= 1;
18773 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18774 THIS_CU->cu may already be in use. So we can't just free it and
18775 replace its DIEs with the ones we read in. Instead, we leave those
18776 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18777 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18779 load_partial_comp_unit (per_cu
);
18781 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
18785 internal_error (__FILE__
, __LINE__
,
18786 _("could not find partial DIE 0x%x "
18787 "in cache [from module %s]\n"),
18788 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
18792 /* See if we can figure out if the class lives in a namespace. We do
18793 this by looking for a member function; its demangled name will
18794 contain namespace info, if there is any. */
18797 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18798 struct dwarf2_cu
*cu
)
18800 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18801 what template types look like, because the demangler
18802 frequently doesn't give the same name as the debug info. We
18803 could fix this by only using the demangled name to get the
18804 prefix (but see comment in read_structure_type). */
18806 struct partial_die_info
*real_pdi
;
18807 struct partial_die_info
*child_pdi
;
18809 /* If this DIE (this DIE's specification, if any) has a parent, then
18810 we should not do this. We'll prepend the parent's fully qualified
18811 name when we create the partial symbol. */
18813 real_pdi
= struct_pdi
;
18814 while (real_pdi
->has_specification
)
18815 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18816 real_pdi
->spec_is_dwz
, cu
);
18818 if (real_pdi
->die_parent
!= NULL
)
18821 for (child_pdi
= struct_pdi
->die_child
;
18823 child_pdi
= child_pdi
->die_sibling
)
18825 if (child_pdi
->tag
== DW_TAG_subprogram
18826 && child_pdi
->linkage_name
!= NULL
)
18828 char *actual_class_name
18829 = language_class_name_from_physname (cu
->language_defn
,
18830 child_pdi
->linkage_name
);
18831 if (actual_class_name
!= NULL
)
18833 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18836 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18838 strlen (actual_class_name
)));
18839 xfree (actual_class_name
);
18846 /* Adjust PART_DIE before generating a symbol for it. This function
18847 may set the is_external flag or change the DIE's name. */
18850 fixup_partial_die (struct partial_die_info
*part_die
,
18851 struct dwarf2_cu
*cu
)
18853 /* Once we've fixed up a die, there's no point in doing so again.
18854 This also avoids a memory leak if we were to call
18855 guess_partial_die_structure_name multiple times. */
18856 if (part_die
->fixup_called
)
18859 /* If we found a reference attribute and the DIE has no name, try
18860 to find a name in the referred to DIE. */
18862 if (part_die
->name
== NULL
&& part_die
->has_specification
)
18864 struct partial_die_info
*spec_die
;
18866 spec_die
= find_partial_die (part_die
->spec_offset
,
18867 part_die
->spec_is_dwz
, cu
);
18869 fixup_partial_die (spec_die
, cu
);
18871 if (spec_die
->name
)
18873 part_die
->name
= spec_die
->name
;
18875 /* Copy DW_AT_external attribute if it is set. */
18876 if (spec_die
->is_external
)
18877 part_die
->is_external
= spec_die
->is_external
;
18881 /* Set default names for some unnamed DIEs. */
18883 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
18884 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
18886 /* If there is no parent die to provide a namespace, and there are
18887 children, see if we can determine the namespace from their linkage
18889 if (cu
->language
== language_cplus
18890 && !VEC_empty (dwarf2_section_info_def
,
18891 cu
->per_cu
->dwarf2_per_objfile
->types
)
18892 && part_die
->die_parent
== NULL
18893 && part_die
->has_children
18894 && (part_die
->tag
== DW_TAG_class_type
18895 || part_die
->tag
== DW_TAG_structure_type
18896 || part_die
->tag
== DW_TAG_union_type
))
18897 guess_partial_die_structure_name (part_die
, cu
);
18899 /* GCC might emit a nameless struct or union that has a linkage
18900 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18901 if (part_die
->name
== NULL
18902 && (part_die
->tag
== DW_TAG_class_type
18903 || part_die
->tag
== DW_TAG_interface_type
18904 || part_die
->tag
== DW_TAG_structure_type
18905 || part_die
->tag
== DW_TAG_union_type
)
18906 && part_die
->linkage_name
!= NULL
)
18910 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
18915 /* Strip any leading namespaces/classes, keep only the base name.
18916 DW_AT_name for named DIEs does not contain the prefixes. */
18917 base
= strrchr (demangled
, ':');
18918 if (base
&& base
> demangled
&& base
[-1] == ':')
18923 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18926 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18927 base
, strlen (base
)));
18932 part_die
->fixup_called
= 1;
18935 /* Read an attribute value described by an attribute form. */
18937 static const gdb_byte
*
18938 read_attribute_value (const struct die_reader_specs
*reader
,
18939 struct attribute
*attr
, unsigned form
,
18940 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18942 struct dwarf2_cu
*cu
= reader
->cu
;
18943 struct dwarf2_per_objfile
*dwarf2_per_objfile
18944 = cu
->per_cu
->dwarf2_per_objfile
;
18945 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18946 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18947 bfd
*abfd
= reader
->abfd
;
18948 struct comp_unit_head
*cu_header
= &cu
->header
;
18949 unsigned int bytes_read
;
18950 struct dwarf_block
*blk
;
18952 attr
->form
= (enum dwarf_form
) form
;
18955 case DW_FORM_ref_addr
:
18956 if (cu
->header
.version
== 2)
18957 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18959 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18960 &cu
->header
, &bytes_read
);
18961 info_ptr
+= bytes_read
;
18963 case DW_FORM_GNU_ref_alt
:
18964 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18965 info_ptr
+= bytes_read
;
18968 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18969 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18970 info_ptr
+= bytes_read
;
18972 case DW_FORM_block2
:
18973 blk
= dwarf_alloc_block (cu
);
18974 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18976 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18977 info_ptr
+= blk
->size
;
18978 DW_BLOCK (attr
) = blk
;
18980 case DW_FORM_block4
:
18981 blk
= dwarf_alloc_block (cu
);
18982 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18984 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18985 info_ptr
+= blk
->size
;
18986 DW_BLOCK (attr
) = blk
;
18988 case DW_FORM_data2
:
18989 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18992 case DW_FORM_data4
:
18993 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18996 case DW_FORM_data8
:
18997 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19000 case DW_FORM_data16
:
19001 blk
= dwarf_alloc_block (cu
);
19003 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19005 DW_BLOCK (attr
) = blk
;
19007 case DW_FORM_sec_offset
:
19008 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19009 info_ptr
+= bytes_read
;
19011 case DW_FORM_string
:
19012 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19013 DW_STRING_IS_CANONICAL (attr
) = 0;
19014 info_ptr
+= bytes_read
;
19017 if (!cu
->per_cu
->is_dwz
)
19019 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19020 abfd
, info_ptr
, cu_header
,
19022 DW_STRING_IS_CANONICAL (attr
) = 0;
19023 info_ptr
+= bytes_read
;
19027 case DW_FORM_line_strp
:
19028 if (!cu
->per_cu
->is_dwz
)
19030 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19032 cu_header
, &bytes_read
);
19033 DW_STRING_IS_CANONICAL (attr
) = 0;
19034 info_ptr
+= bytes_read
;
19038 case DW_FORM_GNU_strp_alt
:
19040 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19041 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19044 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19046 DW_STRING_IS_CANONICAL (attr
) = 0;
19047 info_ptr
+= bytes_read
;
19050 case DW_FORM_exprloc
:
19051 case DW_FORM_block
:
19052 blk
= dwarf_alloc_block (cu
);
19053 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19054 info_ptr
+= bytes_read
;
19055 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19056 info_ptr
+= blk
->size
;
19057 DW_BLOCK (attr
) = blk
;
19059 case DW_FORM_block1
:
19060 blk
= dwarf_alloc_block (cu
);
19061 blk
->size
= read_1_byte (abfd
, info_ptr
);
19063 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19064 info_ptr
+= blk
->size
;
19065 DW_BLOCK (attr
) = blk
;
19067 case DW_FORM_data1
:
19068 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19072 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19075 case DW_FORM_flag_present
:
19076 DW_UNSND (attr
) = 1;
19078 case DW_FORM_sdata
:
19079 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19080 info_ptr
+= bytes_read
;
19082 case DW_FORM_udata
:
19083 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19084 info_ptr
+= bytes_read
;
19087 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19088 + read_1_byte (abfd
, info_ptr
));
19092 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19093 + read_2_bytes (abfd
, info_ptr
));
19097 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19098 + read_4_bytes (abfd
, info_ptr
));
19102 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19103 + read_8_bytes (abfd
, info_ptr
));
19106 case DW_FORM_ref_sig8
:
19107 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19110 case DW_FORM_ref_udata
:
19111 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19112 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19113 info_ptr
+= bytes_read
;
19115 case DW_FORM_indirect
:
19116 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19117 info_ptr
+= bytes_read
;
19118 if (form
== DW_FORM_implicit_const
)
19120 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19121 info_ptr
+= bytes_read
;
19123 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19126 case DW_FORM_implicit_const
:
19127 DW_SND (attr
) = implicit_const
;
19129 case DW_FORM_GNU_addr_index
:
19130 if (reader
->dwo_file
== NULL
)
19132 /* For now flag a hard error.
19133 Later we can turn this into a complaint. */
19134 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19135 dwarf_form_name (form
),
19136 bfd_get_filename (abfd
));
19138 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19139 info_ptr
+= bytes_read
;
19141 case DW_FORM_GNU_str_index
:
19142 if (reader
->dwo_file
== NULL
)
19144 /* For now flag a hard error.
19145 Later we can turn this into a complaint if warranted. */
19146 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19147 dwarf_form_name (form
),
19148 bfd_get_filename (abfd
));
19151 ULONGEST str_index
=
19152 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19154 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19155 DW_STRING_IS_CANONICAL (attr
) = 0;
19156 info_ptr
+= bytes_read
;
19160 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19161 dwarf_form_name (form
),
19162 bfd_get_filename (abfd
));
19166 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19167 attr
->form
= DW_FORM_GNU_ref_alt
;
19169 /* We have seen instances where the compiler tried to emit a byte
19170 size attribute of -1 which ended up being encoded as an unsigned
19171 0xffffffff. Although 0xffffffff is technically a valid size value,
19172 an object of this size seems pretty unlikely so we can relatively
19173 safely treat these cases as if the size attribute was invalid and
19174 treat them as zero by default. */
19175 if (attr
->name
== DW_AT_byte_size
19176 && form
== DW_FORM_data4
19177 && DW_UNSND (attr
) >= 0xffffffff)
19180 (&symfile_complaints
,
19181 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19182 hex_string (DW_UNSND (attr
)));
19183 DW_UNSND (attr
) = 0;
19189 /* Read an attribute described by an abbreviated attribute. */
19191 static const gdb_byte
*
19192 read_attribute (const struct die_reader_specs
*reader
,
19193 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19194 const gdb_byte
*info_ptr
)
19196 attr
->name
= abbrev
->name
;
19197 return read_attribute_value (reader
, attr
, abbrev
->form
,
19198 abbrev
->implicit_const
, info_ptr
);
19201 /* Read dwarf information from a buffer. */
19203 static unsigned int
19204 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19206 return bfd_get_8 (abfd
, buf
);
19210 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19212 return bfd_get_signed_8 (abfd
, buf
);
19215 static unsigned int
19216 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19218 return bfd_get_16 (abfd
, buf
);
19222 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19224 return bfd_get_signed_16 (abfd
, buf
);
19227 static unsigned int
19228 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19230 return bfd_get_32 (abfd
, buf
);
19234 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19236 return bfd_get_signed_32 (abfd
, buf
);
19240 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19242 return bfd_get_64 (abfd
, buf
);
19246 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19247 unsigned int *bytes_read
)
19249 struct comp_unit_head
*cu_header
= &cu
->header
;
19250 CORE_ADDR retval
= 0;
19252 if (cu_header
->signed_addr_p
)
19254 switch (cu_header
->addr_size
)
19257 retval
= bfd_get_signed_16 (abfd
, buf
);
19260 retval
= bfd_get_signed_32 (abfd
, buf
);
19263 retval
= bfd_get_signed_64 (abfd
, buf
);
19266 internal_error (__FILE__
, __LINE__
,
19267 _("read_address: bad switch, signed [in module %s]"),
19268 bfd_get_filename (abfd
));
19273 switch (cu_header
->addr_size
)
19276 retval
= bfd_get_16 (abfd
, buf
);
19279 retval
= bfd_get_32 (abfd
, buf
);
19282 retval
= bfd_get_64 (abfd
, buf
);
19285 internal_error (__FILE__
, __LINE__
,
19286 _("read_address: bad switch, "
19287 "unsigned [in module %s]"),
19288 bfd_get_filename (abfd
));
19292 *bytes_read
= cu_header
->addr_size
;
19296 /* Read the initial length from a section. The (draft) DWARF 3
19297 specification allows the initial length to take up either 4 bytes
19298 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19299 bytes describe the length and all offsets will be 8 bytes in length
19302 An older, non-standard 64-bit format is also handled by this
19303 function. The older format in question stores the initial length
19304 as an 8-byte quantity without an escape value. Lengths greater
19305 than 2^32 aren't very common which means that the initial 4 bytes
19306 is almost always zero. Since a length value of zero doesn't make
19307 sense for the 32-bit format, this initial zero can be considered to
19308 be an escape value which indicates the presence of the older 64-bit
19309 format. As written, the code can't detect (old format) lengths
19310 greater than 4GB. If it becomes necessary to handle lengths
19311 somewhat larger than 4GB, we could allow other small values (such
19312 as the non-sensical values of 1, 2, and 3) to also be used as
19313 escape values indicating the presence of the old format.
19315 The value returned via bytes_read should be used to increment the
19316 relevant pointer after calling read_initial_length().
19318 [ Note: read_initial_length() and read_offset() are based on the
19319 document entitled "DWARF Debugging Information Format", revision
19320 3, draft 8, dated November 19, 2001. This document was obtained
19323 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19325 This document is only a draft and is subject to change. (So beware.)
19327 Details regarding the older, non-standard 64-bit format were
19328 determined empirically by examining 64-bit ELF files produced by
19329 the SGI toolchain on an IRIX 6.5 machine.
19331 - Kevin, July 16, 2002
19335 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19337 LONGEST length
= bfd_get_32 (abfd
, buf
);
19339 if (length
== 0xffffffff)
19341 length
= bfd_get_64 (abfd
, buf
+ 4);
19344 else if (length
== 0)
19346 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19347 length
= bfd_get_64 (abfd
, buf
);
19358 /* Cover function for read_initial_length.
19359 Returns the length of the object at BUF, and stores the size of the
19360 initial length in *BYTES_READ and stores the size that offsets will be in
19362 If the initial length size is not equivalent to that specified in
19363 CU_HEADER then issue a complaint.
19364 This is useful when reading non-comp-unit headers. */
19367 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19368 const struct comp_unit_head
*cu_header
,
19369 unsigned int *bytes_read
,
19370 unsigned int *offset_size
)
19372 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19374 gdb_assert (cu_header
->initial_length_size
== 4
19375 || cu_header
->initial_length_size
== 8
19376 || cu_header
->initial_length_size
== 12);
19378 if (cu_header
->initial_length_size
!= *bytes_read
)
19379 complaint (&symfile_complaints
,
19380 _("intermixed 32-bit and 64-bit DWARF sections"));
19382 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19386 /* Read an offset from the data stream. The size of the offset is
19387 given by cu_header->offset_size. */
19390 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19391 const struct comp_unit_head
*cu_header
,
19392 unsigned int *bytes_read
)
19394 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19396 *bytes_read
= cu_header
->offset_size
;
19400 /* Read an offset from the data stream. */
19403 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19405 LONGEST retval
= 0;
19407 switch (offset_size
)
19410 retval
= bfd_get_32 (abfd
, buf
);
19413 retval
= bfd_get_64 (abfd
, buf
);
19416 internal_error (__FILE__
, __LINE__
,
19417 _("read_offset_1: bad switch [in module %s]"),
19418 bfd_get_filename (abfd
));
19424 static const gdb_byte
*
19425 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19427 /* If the size of a host char is 8 bits, we can return a pointer
19428 to the buffer, otherwise we have to copy the data to a buffer
19429 allocated on the temporary obstack. */
19430 gdb_assert (HOST_CHAR_BIT
== 8);
19434 static const char *
19435 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19436 unsigned int *bytes_read_ptr
)
19438 /* If the size of a host char is 8 bits, we can return a pointer
19439 to the string, otherwise we have to copy the string to a buffer
19440 allocated on the temporary obstack. */
19441 gdb_assert (HOST_CHAR_BIT
== 8);
19444 *bytes_read_ptr
= 1;
19447 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19448 return (const char *) buf
;
19451 /* Return pointer to string at section SECT offset STR_OFFSET with error
19452 reporting strings FORM_NAME and SECT_NAME. */
19454 static const char *
19455 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19456 bfd
*abfd
, LONGEST str_offset
,
19457 struct dwarf2_section_info
*sect
,
19458 const char *form_name
,
19459 const char *sect_name
)
19461 dwarf2_read_section (objfile
, sect
);
19462 if (sect
->buffer
== NULL
)
19463 error (_("%s used without %s section [in module %s]"),
19464 form_name
, sect_name
, bfd_get_filename (abfd
));
19465 if (str_offset
>= sect
->size
)
19466 error (_("%s pointing outside of %s section [in module %s]"),
19467 form_name
, sect_name
, bfd_get_filename (abfd
));
19468 gdb_assert (HOST_CHAR_BIT
== 8);
19469 if (sect
->buffer
[str_offset
] == '\0')
19471 return (const char *) (sect
->buffer
+ str_offset
);
19474 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19476 static const char *
19477 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19478 bfd
*abfd
, LONGEST str_offset
)
19480 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19482 &dwarf2_per_objfile
->str
,
19483 "DW_FORM_strp", ".debug_str");
19486 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19488 static const char *
19489 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19490 bfd
*abfd
, LONGEST str_offset
)
19492 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19494 &dwarf2_per_objfile
->line_str
,
19495 "DW_FORM_line_strp",
19496 ".debug_line_str");
19499 /* Read a string at offset STR_OFFSET in the .debug_str section from
19500 the .dwz file DWZ. Throw an error if the offset is too large. If
19501 the string consists of a single NUL byte, return NULL; otherwise
19502 return a pointer to the string. */
19504 static const char *
19505 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19506 LONGEST str_offset
)
19508 dwarf2_read_section (objfile
, &dwz
->str
);
19510 if (dwz
->str
.buffer
== NULL
)
19511 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19512 "section [in module %s]"),
19513 bfd_get_filename (dwz
->dwz_bfd
));
19514 if (str_offset
>= dwz
->str
.size
)
19515 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19516 ".debug_str section [in module %s]"),
19517 bfd_get_filename (dwz
->dwz_bfd
));
19518 gdb_assert (HOST_CHAR_BIT
== 8);
19519 if (dwz
->str
.buffer
[str_offset
] == '\0')
19521 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19524 /* Return pointer to string at .debug_str offset as read from BUF.
19525 BUF is assumed to be in a compilation unit described by CU_HEADER.
19526 Return *BYTES_READ_PTR count of bytes read from BUF. */
19528 static const char *
19529 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19530 const gdb_byte
*buf
,
19531 const struct comp_unit_head
*cu_header
,
19532 unsigned int *bytes_read_ptr
)
19534 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19536 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19539 /* Return pointer to string at .debug_line_str offset as read from BUF.
19540 BUF is assumed to be in a compilation unit described by CU_HEADER.
19541 Return *BYTES_READ_PTR count of bytes read from BUF. */
19543 static const char *
19544 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19545 bfd
*abfd
, const gdb_byte
*buf
,
19546 const struct comp_unit_head
*cu_header
,
19547 unsigned int *bytes_read_ptr
)
19549 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19551 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19556 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19557 unsigned int *bytes_read_ptr
)
19560 unsigned int num_read
;
19562 unsigned char byte
;
19569 byte
= bfd_get_8 (abfd
, buf
);
19572 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19573 if ((byte
& 128) == 0)
19579 *bytes_read_ptr
= num_read
;
19584 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19585 unsigned int *bytes_read_ptr
)
19588 int shift
, num_read
;
19589 unsigned char byte
;
19596 byte
= bfd_get_8 (abfd
, buf
);
19599 result
|= ((LONGEST
) (byte
& 127) << shift
);
19601 if ((byte
& 128) == 0)
19606 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19607 result
|= -(((LONGEST
) 1) << shift
);
19608 *bytes_read_ptr
= num_read
;
19612 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19613 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19614 ADDR_SIZE is the size of addresses from the CU header. */
19617 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19618 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19620 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19621 bfd
*abfd
= objfile
->obfd
;
19622 const gdb_byte
*info_ptr
;
19624 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19625 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19626 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19627 objfile_name (objfile
));
19628 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19629 error (_("DW_FORM_addr_index pointing outside of "
19630 ".debug_addr section [in module %s]"),
19631 objfile_name (objfile
));
19632 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19633 + addr_base
+ addr_index
* addr_size
);
19634 if (addr_size
== 4)
19635 return bfd_get_32 (abfd
, info_ptr
);
19637 return bfd_get_64 (abfd
, info_ptr
);
19640 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19643 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19645 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19646 cu
->addr_base
, cu
->header
.addr_size
);
19649 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19652 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19653 unsigned int *bytes_read
)
19655 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19656 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19658 return read_addr_index (cu
, addr_index
);
19661 /* Data structure to pass results from dwarf2_read_addr_index_reader
19662 back to dwarf2_read_addr_index. */
19664 struct dwarf2_read_addr_index_data
19666 ULONGEST addr_base
;
19670 /* die_reader_func for dwarf2_read_addr_index. */
19673 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19674 const gdb_byte
*info_ptr
,
19675 struct die_info
*comp_unit_die
,
19679 struct dwarf2_cu
*cu
= reader
->cu
;
19680 struct dwarf2_read_addr_index_data
*aidata
=
19681 (struct dwarf2_read_addr_index_data
*) data
;
19683 aidata
->addr_base
= cu
->addr_base
;
19684 aidata
->addr_size
= cu
->header
.addr_size
;
19687 /* Given an index in .debug_addr, fetch the value.
19688 NOTE: This can be called during dwarf expression evaluation,
19689 long after the debug information has been read, and thus per_cu->cu
19690 may no longer exist. */
19693 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19694 unsigned int addr_index
)
19696 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19697 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19698 struct dwarf2_cu
*cu
= per_cu
->cu
;
19699 ULONGEST addr_base
;
19702 /* We need addr_base and addr_size.
19703 If we don't have PER_CU->cu, we have to get it.
19704 Nasty, but the alternative is storing the needed info in PER_CU,
19705 which at this point doesn't seem justified: it's not clear how frequently
19706 it would get used and it would increase the size of every PER_CU.
19707 Entry points like dwarf2_per_cu_addr_size do a similar thing
19708 so we're not in uncharted territory here.
19709 Alas we need to be a bit more complicated as addr_base is contained
19712 We don't need to read the entire CU(/TU).
19713 We just need the header and top level die.
19715 IWBN to use the aging mechanism to let us lazily later discard the CU.
19716 For now we skip this optimization. */
19720 addr_base
= cu
->addr_base
;
19721 addr_size
= cu
->header
.addr_size
;
19725 struct dwarf2_read_addr_index_data aidata
;
19727 /* Note: We can't use init_cutu_and_read_dies_simple here,
19728 we need addr_base. */
19729 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
19730 dwarf2_read_addr_index_reader
, &aidata
);
19731 addr_base
= aidata
.addr_base
;
19732 addr_size
= aidata
.addr_size
;
19735 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19739 /* Given a DW_FORM_GNU_str_index, fetch the string.
19740 This is only used by the Fission support. */
19742 static const char *
19743 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19745 struct dwarf2_cu
*cu
= reader
->cu
;
19746 struct dwarf2_per_objfile
*dwarf2_per_objfile
19747 = cu
->per_cu
->dwarf2_per_objfile
;
19748 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19749 const char *objf_name
= objfile_name (objfile
);
19750 bfd
*abfd
= objfile
->obfd
;
19751 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19752 struct dwarf2_section_info
*str_offsets_section
=
19753 &reader
->dwo_file
->sections
.str_offsets
;
19754 const gdb_byte
*info_ptr
;
19755 ULONGEST str_offset
;
19756 static const char form_name
[] = "DW_FORM_GNU_str_index";
19758 dwarf2_read_section (objfile
, str_section
);
19759 dwarf2_read_section (objfile
, str_offsets_section
);
19760 if (str_section
->buffer
== NULL
)
19761 error (_("%s used without .debug_str.dwo section"
19762 " in CU at offset 0x%x [in module %s]"),
19763 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
19764 if (str_offsets_section
->buffer
== NULL
)
19765 error (_("%s used without .debug_str_offsets.dwo section"
19766 " in CU at offset 0x%x [in module %s]"),
19767 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
19768 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19769 error (_("%s pointing outside of .debug_str_offsets.dwo"
19770 " section in CU at offset 0x%x [in module %s]"),
19771 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
19772 info_ptr
= (str_offsets_section
->buffer
19773 + str_index
* cu
->header
.offset_size
);
19774 if (cu
->header
.offset_size
== 4)
19775 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19777 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19778 if (str_offset
>= str_section
->size
)
19779 error (_("Offset from %s pointing outside of"
19780 " .debug_str.dwo section in CU at offset 0x%x [in module %s]"),
19781 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
19782 return (const char *) (str_section
->buffer
+ str_offset
);
19785 /* Return the length of an LEB128 number in BUF. */
19788 leb128_size (const gdb_byte
*buf
)
19790 const gdb_byte
*begin
= buf
;
19796 if ((byte
& 128) == 0)
19797 return buf
- begin
;
19802 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19811 cu
->language
= language_c
;
19814 case DW_LANG_C_plus_plus
:
19815 case DW_LANG_C_plus_plus_11
:
19816 case DW_LANG_C_plus_plus_14
:
19817 cu
->language
= language_cplus
;
19820 cu
->language
= language_d
;
19822 case DW_LANG_Fortran77
:
19823 case DW_LANG_Fortran90
:
19824 case DW_LANG_Fortran95
:
19825 case DW_LANG_Fortran03
:
19826 case DW_LANG_Fortran08
:
19827 cu
->language
= language_fortran
;
19830 cu
->language
= language_go
;
19832 case DW_LANG_Mips_Assembler
:
19833 cu
->language
= language_asm
;
19835 case DW_LANG_Ada83
:
19836 case DW_LANG_Ada95
:
19837 cu
->language
= language_ada
;
19839 case DW_LANG_Modula2
:
19840 cu
->language
= language_m2
;
19842 case DW_LANG_Pascal83
:
19843 cu
->language
= language_pascal
;
19846 cu
->language
= language_objc
;
19849 case DW_LANG_Rust_old
:
19850 cu
->language
= language_rust
;
19852 case DW_LANG_Cobol74
:
19853 case DW_LANG_Cobol85
:
19855 cu
->language
= language_minimal
;
19858 cu
->language_defn
= language_def (cu
->language
);
19861 /* Return the named attribute or NULL if not there. */
19863 static struct attribute
*
19864 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19869 struct attribute
*spec
= NULL
;
19871 for (i
= 0; i
< die
->num_attrs
; ++i
)
19873 if (die
->attrs
[i
].name
== name
)
19874 return &die
->attrs
[i
];
19875 if (die
->attrs
[i
].name
== DW_AT_specification
19876 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19877 spec
= &die
->attrs
[i
];
19883 die
= follow_die_ref (die
, spec
, &cu
);
19889 /* Return the named attribute or NULL if not there,
19890 but do not follow DW_AT_specification, etc.
19891 This is for use in contexts where we're reading .debug_types dies.
19892 Following DW_AT_specification, DW_AT_abstract_origin will take us
19893 back up the chain, and we want to go down. */
19895 static struct attribute
*
19896 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19900 for (i
= 0; i
< die
->num_attrs
; ++i
)
19901 if (die
->attrs
[i
].name
== name
)
19902 return &die
->attrs
[i
];
19907 /* Return the string associated with a string-typed attribute, or NULL if it
19908 is either not found or is of an incorrect type. */
19910 static const char *
19911 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19913 struct attribute
*attr
;
19914 const char *str
= NULL
;
19916 attr
= dwarf2_attr (die
, name
, cu
);
19920 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19921 || attr
->form
== DW_FORM_string
19922 || attr
->form
== DW_FORM_GNU_str_index
19923 || attr
->form
== DW_FORM_GNU_strp_alt
)
19924 str
= DW_STRING (attr
);
19926 complaint (&symfile_complaints
,
19927 _("string type expected for attribute %s for "
19928 "DIE at 0x%x in module %s"),
19929 dwarf_attr_name (name
), to_underlying (die
->sect_off
),
19930 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19936 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19937 and holds a non-zero value. This function should only be used for
19938 DW_FORM_flag or DW_FORM_flag_present attributes. */
19941 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19943 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19945 return (attr
&& DW_UNSND (attr
));
19949 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19951 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19952 which value is non-zero. However, we have to be careful with
19953 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19954 (via dwarf2_flag_true_p) follows this attribute. So we may
19955 end up accidently finding a declaration attribute that belongs
19956 to a different DIE referenced by the specification attribute,
19957 even though the given DIE does not have a declaration attribute. */
19958 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19959 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19962 /* Return the die giving the specification for DIE, if there is
19963 one. *SPEC_CU is the CU containing DIE on input, and the CU
19964 containing the return value on output. If there is no
19965 specification, but there is an abstract origin, that is
19968 static struct die_info
*
19969 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19971 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19974 if (spec_attr
== NULL
)
19975 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19977 if (spec_attr
== NULL
)
19980 return follow_die_ref (die
, spec_attr
, spec_cu
);
19983 /* Stub for free_line_header to match void * callback types. */
19986 free_line_header_voidp (void *arg
)
19988 struct line_header
*lh
= (struct line_header
*) arg
;
19994 line_header::add_include_dir (const char *include_dir
)
19996 if (dwarf_line_debug
>= 2)
19997 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19998 include_dirs
.size () + 1, include_dir
);
20000 include_dirs
.push_back (include_dir
);
20004 line_header::add_file_name (const char *name
,
20006 unsigned int mod_time
,
20007 unsigned int length
)
20009 if (dwarf_line_debug
>= 2)
20010 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
20011 (unsigned) file_names
.size () + 1, name
);
20013 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20016 /* A convenience function to find the proper .debug_line section for a CU. */
20018 static struct dwarf2_section_info
*
20019 get_debug_line_section (struct dwarf2_cu
*cu
)
20021 struct dwarf2_section_info
*section
;
20022 struct dwarf2_per_objfile
*dwarf2_per_objfile
20023 = cu
->per_cu
->dwarf2_per_objfile
;
20025 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20027 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20028 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20029 else if (cu
->per_cu
->is_dwz
)
20031 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20033 section
= &dwz
->line
;
20036 section
= &dwarf2_per_objfile
->line
;
20041 /* Read directory or file name entry format, starting with byte of
20042 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20043 entries count and the entries themselves in the described entry
20047 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20048 bfd
*abfd
, const gdb_byte
**bufp
,
20049 struct line_header
*lh
,
20050 const struct comp_unit_head
*cu_header
,
20051 void (*callback
) (struct line_header
*lh
,
20054 unsigned int mod_time
,
20055 unsigned int length
))
20057 gdb_byte format_count
, formati
;
20058 ULONGEST data_count
, datai
;
20059 const gdb_byte
*buf
= *bufp
;
20060 const gdb_byte
*format_header_data
;
20061 unsigned int bytes_read
;
20063 format_count
= read_1_byte (abfd
, buf
);
20065 format_header_data
= buf
;
20066 for (formati
= 0; formati
< format_count
; formati
++)
20068 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20070 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20074 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20076 for (datai
= 0; datai
< data_count
; datai
++)
20078 const gdb_byte
*format
= format_header_data
;
20079 struct file_entry fe
;
20081 for (formati
= 0; formati
< format_count
; formati
++)
20083 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20084 format
+= bytes_read
;
20086 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20087 format
+= bytes_read
;
20089 gdb::optional
<const char *> string
;
20090 gdb::optional
<unsigned int> uint
;
20094 case DW_FORM_string
:
20095 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20099 case DW_FORM_line_strp
:
20100 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20107 case DW_FORM_data1
:
20108 uint
.emplace (read_1_byte (abfd
, buf
));
20112 case DW_FORM_data2
:
20113 uint
.emplace (read_2_bytes (abfd
, buf
));
20117 case DW_FORM_data4
:
20118 uint
.emplace (read_4_bytes (abfd
, buf
));
20122 case DW_FORM_data8
:
20123 uint
.emplace (read_8_bytes (abfd
, buf
));
20127 case DW_FORM_udata
:
20128 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20132 case DW_FORM_block
:
20133 /* It is valid only for DW_LNCT_timestamp which is ignored by
20138 switch (content_type
)
20141 if (string
.has_value ())
20144 case DW_LNCT_directory_index
:
20145 if (uint
.has_value ())
20146 fe
.d_index
= (dir_index
) *uint
;
20148 case DW_LNCT_timestamp
:
20149 if (uint
.has_value ())
20150 fe
.mod_time
= *uint
;
20153 if (uint
.has_value ())
20159 complaint (&symfile_complaints
,
20160 _("Unknown format content type %s"),
20161 pulongest (content_type
));
20165 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20171 /* Read the statement program header starting at OFFSET in
20172 .debug_line, or .debug_line.dwo. Return a pointer
20173 to a struct line_header, allocated using xmalloc.
20174 Returns NULL if there is a problem reading the header, e.g., if it
20175 has a version we don't understand.
20177 NOTE: the strings in the include directory and file name tables of
20178 the returned object point into the dwarf line section buffer,
20179 and must not be freed. */
20181 static line_header_up
20182 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20184 const gdb_byte
*line_ptr
;
20185 unsigned int bytes_read
, offset_size
;
20187 const char *cur_dir
, *cur_file
;
20188 struct dwarf2_section_info
*section
;
20190 struct dwarf2_per_objfile
*dwarf2_per_objfile
20191 = cu
->per_cu
->dwarf2_per_objfile
;
20193 section
= get_debug_line_section (cu
);
20194 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20195 if (section
->buffer
== NULL
)
20197 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20198 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20200 complaint (&symfile_complaints
, _("missing .debug_line section"));
20204 /* We can't do this until we know the section is non-empty.
20205 Only then do we know we have such a section. */
20206 abfd
= get_section_bfd_owner (section
);
20208 /* Make sure that at least there's room for the total_length field.
20209 That could be 12 bytes long, but we're just going to fudge that. */
20210 if (to_underlying (sect_off
) + 4 >= section
->size
)
20212 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20216 line_header_up
lh (new line_header ());
20218 lh
->sect_off
= sect_off
;
20219 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20221 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20223 /* Read in the header. */
20225 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20226 &bytes_read
, &offset_size
);
20227 line_ptr
+= bytes_read
;
20228 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20230 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20233 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20234 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20236 if (lh
->version
> 5)
20238 /* This is a version we don't understand. The format could have
20239 changed in ways we don't handle properly so just punt. */
20240 complaint (&symfile_complaints
,
20241 _("unsupported version in .debug_line section"));
20244 if (lh
->version
>= 5)
20246 gdb_byte segment_selector_size
;
20248 /* Skip address size. */
20249 read_1_byte (abfd
, line_ptr
);
20252 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20254 if (segment_selector_size
!= 0)
20256 complaint (&symfile_complaints
,
20257 _("unsupported segment selector size %u "
20258 "in .debug_line section"),
20259 segment_selector_size
);
20263 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20264 line_ptr
+= offset_size
;
20265 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20267 if (lh
->version
>= 4)
20269 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20273 lh
->maximum_ops_per_instruction
= 1;
20275 if (lh
->maximum_ops_per_instruction
== 0)
20277 lh
->maximum_ops_per_instruction
= 1;
20278 complaint (&symfile_complaints
,
20279 _("invalid maximum_ops_per_instruction "
20280 "in `.debug_line' section"));
20283 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20285 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20287 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20289 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20291 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20293 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20294 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20296 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20300 if (lh
->version
>= 5)
20302 /* Read directory table. */
20303 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20305 [] (struct line_header
*lh
, const char *name
,
20306 dir_index d_index
, unsigned int mod_time
,
20307 unsigned int length
)
20309 lh
->add_include_dir (name
);
20312 /* Read file name table. */
20313 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20315 [] (struct line_header
*lh
, const char *name
,
20316 dir_index d_index
, unsigned int mod_time
,
20317 unsigned int length
)
20319 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20324 /* Read directory table. */
20325 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20327 line_ptr
+= bytes_read
;
20328 lh
->add_include_dir (cur_dir
);
20330 line_ptr
+= bytes_read
;
20332 /* Read file name table. */
20333 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20335 unsigned int mod_time
, length
;
20338 line_ptr
+= bytes_read
;
20339 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20340 line_ptr
+= bytes_read
;
20341 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20342 line_ptr
+= bytes_read
;
20343 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20344 line_ptr
+= bytes_read
;
20346 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20348 line_ptr
+= bytes_read
;
20350 lh
->statement_program_start
= line_ptr
;
20352 if (line_ptr
> (section
->buffer
+ section
->size
))
20353 complaint (&symfile_complaints
,
20354 _("line number info header doesn't "
20355 "fit in `.debug_line' section"));
20360 /* Subroutine of dwarf_decode_lines to simplify it.
20361 Return the file name of the psymtab for included file FILE_INDEX
20362 in line header LH of PST.
20363 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20364 If space for the result is malloc'd, *NAME_HOLDER will be set.
20365 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20367 static const char *
20368 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20369 const struct partial_symtab
*pst
,
20370 const char *comp_dir
,
20371 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20373 const file_entry
&fe
= lh
->file_names
[file_index
];
20374 const char *include_name
= fe
.name
;
20375 const char *include_name_to_compare
= include_name
;
20376 const char *pst_filename
;
20379 const char *dir_name
= fe
.include_dir (lh
);
20381 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20382 if (!IS_ABSOLUTE_PATH (include_name
)
20383 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20385 /* Avoid creating a duplicate psymtab for PST.
20386 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20387 Before we do the comparison, however, we need to account
20388 for DIR_NAME and COMP_DIR.
20389 First prepend dir_name (if non-NULL). If we still don't
20390 have an absolute path prepend comp_dir (if non-NULL).
20391 However, the directory we record in the include-file's
20392 psymtab does not contain COMP_DIR (to match the
20393 corresponding symtab(s)).
20398 bash$ gcc -g ./hello.c
20399 include_name = "hello.c"
20401 DW_AT_comp_dir = comp_dir = "/tmp"
20402 DW_AT_name = "./hello.c"
20406 if (dir_name
!= NULL
)
20408 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20409 include_name
, (char *) NULL
));
20410 include_name
= name_holder
->get ();
20411 include_name_to_compare
= include_name
;
20413 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20415 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20416 include_name
, (char *) NULL
));
20417 include_name_to_compare
= hold_compare
.get ();
20421 pst_filename
= pst
->filename
;
20422 gdb::unique_xmalloc_ptr
<char> copied_name
;
20423 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20425 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20426 pst_filename
, (char *) NULL
));
20427 pst_filename
= copied_name
.get ();
20430 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20434 return include_name
;
20437 /* State machine to track the state of the line number program. */
20439 class lnp_state_machine
20442 /* Initialize a machine state for the start of a line number
20444 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20446 file_entry
*current_file ()
20448 /* lh->file_names is 0-based, but the file name numbers in the
20449 statement program are 1-based. */
20450 return m_line_header
->file_name_at (m_file
);
20453 /* Record the line in the state machine. END_SEQUENCE is true if
20454 we're processing the end of a sequence. */
20455 void record_line (bool end_sequence
);
20457 /* Check address and if invalid nop-out the rest of the lines in this
20459 void check_line_address (struct dwarf2_cu
*cu
,
20460 const gdb_byte
*line_ptr
,
20461 CORE_ADDR lowpc
, CORE_ADDR address
);
20463 void handle_set_discriminator (unsigned int discriminator
)
20465 m_discriminator
= discriminator
;
20466 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20469 /* Handle DW_LNE_set_address. */
20470 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20473 address
+= baseaddr
;
20474 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20477 /* Handle DW_LNS_advance_pc. */
20478 void handle_advance_pc (CORE_ADDR adjust
);
20480 /* Handle a special opcode. */
20481 void handle_special_opcode (unsigned char op_code
);
20483 /* Handle DW_LNS_advance_line. */
20484 void handle_advance_line (int line_delta
)
20486 advance_line (line_delta
);
20489 /* Handle DW_LNS_set_file. */
20490 void handle_set_file (file_name_index file
);
20492 /* Handle DW_LNS_negate_stmt. */
20493 void handle_negate_stmt ()
20495 m_is_stmt
= !m_is_stmt
;
20498 /* Handle DW_LNS_const_add_pc. */
20499 void handle_const_add_pc ();
20501 /* Handle DW_LNS_fixed_advance_pc. */
20502 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20504 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20508 /* Handle DW_LNS_copy. */
20509 void handle_copy ()
20511 record_line (false);
20512 m_discriminator
= 0;
20515 /* Handle DW_LNE_end_sequence. */
20516 void handle_end_sequence ()
20518 m_record_line_callback
= ::record_line
;
20522 /* Advance the line by LINE_DELTA. */
20523 void advance_line (int line_delta
)
20525 m_line
+= line_delta
;
20527 if (line_delta
!= 0)
20528 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20531 gdbarch
*m_gdbarch
;
20533 /* True if we're recording lines.
20534 Otherwise we're building partial symtabs and are just interested in
20535 finding include files mentioned by the line number program. */
20536 bool m_record_lines_p
;
20538 /* The line number header. */
20539 line_header
*m_line_header
;
20541 /* These are part of the standard DWARF line number state machine,
20542 and initialized according to the DWARF spec. */
20544 unsigned char m_op_index
= 0;
20545 /* The line table index (1-based) of the current file. */
20546 file_name_index m_file
= (file_name_index
) 1;
20547 unsigned int m_line
= 1;
20549 /* These are initialized in the constructor. */
20551 CORE_ADDR m_address
;
20553 unsigned int m_discriminator
;
20555 /* Additional bits of state we need to track. */
20557 /* The last file that we called dwarf2_start_subfile for.
20558 This is only used for TLLs. */
20559 unsigned int m_last_file
= 0;
20560 /* The last file a line number was recorded for. */
20561 struct subfile
*m_last_subfile
= NULL
;
20563 /* The function to call to record a line. */
20564 record_line_ftype
*m_record_line_callback
= NULL
;
20566 /* The last line number that was recorded, used to coalesce
20567 consecutive entries for the same line. This can happen, for
20568 example, when discriminators are present. PR 17276. */
20569 unsigned int m_last_line
= 0;
20570 bool m_line_has_non_zero_discriminator
= false;
20574 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20576 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20577 / m_line_header
->maximum_ops_per_instruction
)
20578 * m_line_header
->minimum_instruction_length
);
20579 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20580 m_op_index
= ((m_op_index
+ adjust
)
20581 % m_line_header
->maximum_ops_per_instruction
);
20585 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20587 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20588 CORE_ADDR addr_adj
= (((m_op_index
20589 + (adj_opcode
/ m_line_header
->line_range
))
20590 / m_line_header
->maximum_ops_per_instruction
)
20591 * m_line_header
->minimum_instruction_length
);
20592 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20593 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20594 % m_line_header
->maximum_ops_per_instruction
);
20596 int line_delta
= (m_line_header
->line_base
20597 + (adj_opcode
% m_line_header
->line_range
));
20598 advance_line (line_delta
);
20599 record_line (false);
20600 m_discriminator
= 0;
20604 lnp_state_machine::handle_set_file (file_name_index file
)
20608 const file_entry
*fe
= current_file ();
20610 dwarf2_debug_line_missing_file_complaint ();
20611 else if (m_record_lines_p
)
20613 const char *dir
= fe
->include_dir (m_line_header
);
20615 m_last_subfile
= current_subfile
;
20616 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20617 dwarf2_start_subfile (fe
->name
, dir
);
20622 lnp_state_machine::handle_const_add_pc ()
20625 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20628 = (((m_op_index
+ adjust
)
20629 / m_line_header
->maximum_ops_per_instruction
)
20630 * m_line_header
->minimum_instruction_length
);
20632 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20633 m_op_index
= ((m_op_index
+ adjust
)
20634 % m_line_header
->maximum_ops_per_instruction
);
20637 /* Ignore this record_line request. */
20640 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20645 /* Return non-zero if we should add LINE to the line number table.
20646 LINE is the line to add, LAST_LINE is the last line that was added,
20647 LAST_SUBFILE is the subfile for LAST_LINE.
20648 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20649 had a non-zero discriminator.
20651 We have to be careful in the presence of discriminators.
20652 E.g., for this line:
20654 for (i = 0; i < 100000; i++);
20656 clang can emit four line number entries for that one line,
20657 each with a different discriminator.
20658 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20660 However, we want gdb to coalesce all four entries into one.
20661 Otherwise the user could stepi into the middle of the line and
20662 gdb would get confused about whether the pc really was in the
20663 middle of the line.
20665 Things are further complicated by the fact that two consecutive
20666 line number entries for the same line is a heuristic used by gcc
20667 to denote the end of the prologue. So we can't just discard duplicate
20668 entries, we have to be selective about it. The heuristic we use is
20669 that we only collapse consecutive entries for the same line if at least
20670 one of those entries has a non-zero discriminator. PR 17276.
20672 Note: Addresses in the line number state machine can never go backwards
20673 within one sequence, thus this coalescing is ok. */
20676 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20677 int line_has_non_zero_discriminator
,
20678 struct subfile
*last_subfile
)
20680 if (current_subfile
!= last_subfile
)
20682 if (line
!= last_line
)
20684 /* Same line for the same file that we've seen already.
20685 As a last check, for pr 17276, only record the line if the line
20686 has never had a non-zero discriminator. */
20687 if (!line_has_non_zero_discriminator
)
20692 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20693 in the line table of subfile SUBFILE. */
20696 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20697 unsigned int line
, CORE_ADDR address
,
20698 record_line_ftype p_record_line
)
20700 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20702 if (dwarf_line_debug
)
20704 fprintf_unfiltered (gdb_stdlog
,
20705 "Recording line %u, file %s, address %s\n",
20706 line
, lbasename (subfile
->name
),
20707 paddress (gdbarch
, address
));
20710 (*p_record_line
) (subfile
, line
, addr
);
20713 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20714 Mark the end of a set of line number records.
20715 The arguments are the same as for dwarf_record_line_1.
20716 If SUBFILE is NULL the request is ignored. */
20719 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20720 CORE_ADDR address
, record_line_ftype p_record_line
)
20722 if (subfile
== NULL
)
20725 if (dwarf_line_debug
)
20727 fprintf_unfiltered (gdb_stdlog
,
20728 "Finishing current line, file %s, address %s\n",
20729 lbasename (subfile
->name
),
20730 paddress (gdbarch
, address
));
20733 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20737 lnp_state_machine::record_line (bool end_sequence
)
20739 if (dwarf_line_debug
)
20741 fprintf_unfiltered (gdb_stdlog
,
20742 "Processing actual line %u: file %u,"
20743 " address %s, is_stmt %u, discrim %u\n",
20744 m_line
, to_underlying (m_file
),
20745 paddress (m_gdbarch
, m_address
),
20746 m_is_stmt
, m_discriminator
);
20749 file_entry
*fe
= current_file ();
20752 dwarf2_debug_line_missing_file_complaint ();
20753 /* For now we ignore lines not starting on an instruction boundary.
20754 But not when processing end_sequence for compatibility with the
20755 previous version of the code. */
20756 else if (m_op_index
== 0 || end_sequence
)
20758 fe
->included_p
= 1;
20759 if (m_record_lines_p
&& m_is_stmt
)
20761 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20763 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20764 m_address
, m_record_line_callback
);
20769 if (dwarf_record_line_p (m_line
, m_last_line
,
20770 m_line_has_non_zero_discriminator
,
20773 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20775 m_record_line_callback
);
20777 m_last_subfile
= current_subfile
;
20778 m_last_line
= m_line
;
20784 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20785 bool record_lines_p
)
20788 m_record_lines_p
= record_lines_p
;
20789 m_line_header
= lh
;
20791 m_record_line_callback
= ::record_line
;
20793 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20794 was a line entry for it so that the backend has a chance to adjust it
20795 and also record it in case it needs it. This is currently used by MIPS
20796 code, cf. `mips_adjust_dwarf2_line'. */
20797 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20798 m_is_stmt
= lh
->default_is_stmt
;
20799 m_discriminator
= 0;
20803 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20804 const gdb_byte
*line_ptr
,
20805 CORE_ADDR lowpc
, CORE_ADDR address
)
20807 /* If address < lowpc then it's not a usable value, it's outside the
20808 pc range of the CU. However, we restrict the test to only address
20809 values of zero to preserve GDB's previous behaviour which is to
20810 handle the specific case of a function being GC'd by the linker. */
20812 if (address
== 0 && address
< lowpc
)
20814 /* This line table is for a function which has been
20815 GCd by the linker. Ignore it. PR gdb/12528 */
20817 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20818 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20820 complaint (&symfile_complaints
,
20821 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20822 line_offset
, objfile_name (objfile
));
20823 m_record_line_callback
= noop_record_line
;
20824 /* Note: record_line_callback is left as noop_record_line until
20825 we see DW_LNE_end_sequence. */
20829 /* Subroutine of dwarf_decode_lines to simplify it.
20830 Process the line number information in LH.
20831 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20832 program in order to set included_p for every referenced header. */
20835 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20836 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20838 const gdb_byte
*line_ptr
, *extended_end
;
20839 const gdb_byte
*line_end
;
20840 unsigned int bytes_read
, extended_len
;
20841 unsigned char op_code
, extended_op
;
20842 CORE_ADDR baseaddr
;
20843 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20844 bfd
*abfd
= objfile
->obfd
;
20845 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20846 /* True if we're recording line info (as opposed to building partial
20847 symtabs and just interested in finding include files mentioned by
20848 the line number program). */
20849 bool record_lines_p
= !decode_for_pst_p
;
20851 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20853 line_ptr
= lh
->statement_program_start
;
20854 line_end
= lh
->statement_program_end
;
20856 /* Read the statement sequences until there's nothing left. */
20857 while (line_ptr
< line_end
)
20859 /* The DWARF line number program state machine. Reset the state
20860 machine at the start of each sequence. */
20861 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20862 bool end_sequence
= false;
20864 if (record_lines_p
)
20866 /* Start a subfile for the current file of the state
20868 const file_entry
*fe
= state_machine
.current_file ();
20871 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20874 /* Decode the table. */
20875 while (line_ptr
< line_end
&& !end_sequence
)
20877 op_code
= read_1_byte (abfd
, line_ptr
);
20880 if (op_code
>= lh
->opcode_base
)
20882 /* Special opcode. */
20883 state_machine
.handle_special_opcode (op_code
);
20885 else switch (op_code
)
20887 case DW_LNS_extended_op
:
20888 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20890 line_ptr
+= bytes_read
;
20891 extended_end
= line_ptr
+ extended_len
;
20892 extended_op
= read_1_byte (abfd
, line_ptr
);
20894 switch (extended_op
)
20896 case DW_LNE_end_sequence
:
20897 state_machine
.handle_end_sequence ();
20898 end_sequence
= true;
20900 case DW_LNE_set_address
:
20903 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20904 line_ptr
+= bytes_read
;
20906 state_machine
.check_line_address (cu
, line_ptr
,
20908 state_machine
.handle_set_address (baseaddr
, address
);
20911 case DW_LNE_define_file
:
20913 const char *cur_file
;
20914 unsigned int mod_time
, length
;
20917 cur_file
= read_direct_string (abfd
, line_ptr
,
20919 line_ptr
+= bytes_read
;
20920 dindex
= (dir_index
)
20921 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20922 line_ptr
+= bytes_read
;
20924 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20925 line_ptr
+= bytes_read
;
20927 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20928 line_ptr
+= bytes_read
;
20929 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20932 case DW_LNE_set_discriminator
:
20934 /* The discriminator is not interesting to the
20935 debugger; just ignore it. We still need to
20936 check its value though:
20937 if there are consecutive entries for the same
20938 (non-prologue) line we want to coalesce them.
20941 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20942 line_ptr
+= bytes_read
;
20944 state_machine
.handle_set_discriminator (discr
);
20948 complaint (&symfile_complaints
,
20949 _("mangled .debug_line section"));
20952 /* Make sure that we parsed the extended op correctly. If e.g.
20953 we expected a different address size than the producer used,
20954 we may have read the wrong number of bytes. */
20955 if (line_ptr
!= extended_end
)
20957 complaint (&symfile_complaints
,
20958 _("mangled .debug_line section"));
20963 state_machine
.handle_copy ();
20965 case DW_LNS_advance_pc
:
20968 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20969 line_ptr
+= bytes_read
;
20971 state_machine
.handle_advance_pc (adjust
);
20974 case DW_LNS_advance_line
:
20977 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20978 line_ptr
+= bytes_read
;
20980 state_machine
.handle_advance_line (line_delta
);
20983 case DW_LNS_set_file
:
20985 file_name_index file
20986 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20988 line_ptr
+= bytes_read
;
20990 state_machine
.handle_set_file (file
);
20993 case DW_LNS_set_column
:
20994 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20995 line_ptr
+= bytes_read
;
20997 case DW_LNS_negate_stmt
:
20998 state_machine
.handle_negate_stmt ();
21000 case DW_LNS_set_basic_block
:
21002 /* Add to the address register of the state machine the
21003 address increment value corresponding to special opcode
21004 255. I.e., this value is scaled by the minimum
21005 instruction length since special opcode 255 would have
21006 scaled the increment. */
21007 case DW_LNS_const_add_pc
:
21008 state_machine
.handle_const_add_pc ();
21010 case DW_LNS_fixed_advance_pc
:
21012 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21015 state_machine
.handle_fixed_advance_pc (addr_adj
);
21020 /* Unknown standard opcode, ignore it. */
21023 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21025 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21026 line_ptr
+= bytes_read
;
21033 dwarf2_debug_line_missing_end_sequence_complaint ();
21035 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21036 in which case we still finish recording the last line). */
21037 state_machine
.record_line (true);
21041 /* Decode the Line Number Program (LNP) for the given line_header
21042 structure and CU. The actual information extracted and the type
21043 of structures created from the LNP depends on the value of PST.
21045 1. If PST is NULL, then this procedure uses the data from the program
21046 to create all necessary symbol tables, and their linetables.
21048 2. If PST is not NULL, this procedure reads the program to determine
21049 the list of files included by the unit represented by PST, and
21050 builds all the associated partial symbol tables.
21052 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21053 It is used for relative paths in the line table.
21054 NOTE: When processing partial symtabs (pst != NULL),
21055 comp_dir == pst->dirname.
21057 NOTE: It is important that psymtabs have the same file name (via strcmp)
21058 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21059 symtab we don't use it in the name of the psymtabs we create.
21060 E.g. expand_line_sal requires this when finding psymtabs to expand.
21061 A good testcase for this is mb-inline.exp.
21063 LOWPC is the lowest address in CU (or 0 if not known).
21065 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21066 for its PC<->lines mapping information. Otherwise only the filename
21067 table is read in. */
21070 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21071 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21072 CORE_ADDR lowpc
, int decode_mapping
)
21074 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21075 const int decode_for_pst_p
= (pst
!= NULL
);
21077 if (decode_mapping
)
21078 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21080 if (decode_for_pst_p
)
21084 /* Now that we're done scanning the Line Header Program, we can
21085 create the psymtab of each included file. */
21086 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21087 if (lh
->file_names
[file_index
].included_p
== 1)
21089 gdb::unique_xmalloc_ptr
<char> name_holder
;
21090 const char *include_name
=
21091 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21093 if (include_name
!= NULL
)
21094 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21099 /* Make sure a symtab is created for every file, even files
21100 which contain only variables (i.e. no code with associated
21102 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
21105 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21107 file_entry
&fe
= lh
->file_names
[i
];
21109 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
21111 if (current_subfile
->symtab
== NULL
)
21113 current_subfile
->symtab
21114 = allocate_symtab (cust
, current_subfile
->name
);
21116 fe
.symtab
= current_subfile
->symtab
;
21121 /* Start a subfile for DWARF. FILENAME is the name of the file and
21122 DIRNAME the name of the source directory which contains FILENAME
21123 or NULL if not known.
21124 This routine tries to keep line numbers from identical absolute and
21125 relative file names in a common subfile.
21127 Using the `list' example from the GDB testsuite, which resides in
21128 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21129 of /srcdir/list0.c yields the following debugging information for list0.c:
21131 DW_AT_name: /srcdir/list0.c
21132 DW_AT_comp_dir: /compdir
21133 files.files[0].name: list0.h
21134 files.files[0].dir: /srcdir
21135 files.files[1].name: list0.c
21136 files.files[1].dir: /srcdir
21138 The line number information for list0.c has to end up in a single
21139 subfile, so that `break /srcdir/list0.c:1' works as expected.
21140 start_subfile will ensure that this happens provided that we pass the
21141 concatenation of files.files[1].dir and files.files[1].name as the
21145 dwarf2_start_subfile (const char *filename
, const char *dirname
)
21149 /* In order not to lose the line information directory,
21150 we concatenate it to the filename when it makes sense.
21151 Note that the Dwarf3 standard says (speaking of filenames in line
21152 information): ``The directory index is ignored for file names
21153 that represent full path names''. Thus ignoring dirname in the
21154 `else' branch below isn't an issue. */
21156 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21158 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21162 start_subfile (filename
);
21168 /* Start a symtab for DWARF.
21169 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21171 static struct compunit_symtab
*
21172 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21173 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21175 struct compunit_symtab
*cust
21176 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21177 low_pc
, cu
->language
);
21179 record_debugformat ("DWARF 2");
21180 record_producer (cu
->producer
);
21182 /* We assume that we're processing GCC output. */
21183 processing_gcc_compilation
= 2;
21185 cu
->processing_has_namespace_info
= 0;
21191 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21192 struct dwarf2_cu
*cu
)
21194 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21195 struct comp_unit_head
*cu_header
= &cu
->header
;
21197 /* NOTE drow/2003-01-30: There used to be a comment and some special
21198 code here to turn a symbol with DW_AT_external and a
21199 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21200 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21201 with some versions of binutils) where shared libraries could have
21202 relocations against symbols in their debug information - the
21203 minimal symbol would have the right address, but the debug info
21204 would not. It's no longer necessary, because we will explicitly
21205 apply relocations when we read in the debug information now. */
21207 /* A DW_AT_location attribute with no contents indicates that a
21208 variable has been optimized away. */
21209 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21211 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21215 /* Handle one degenerate form of location expression specially, to
21216 preserve GDB's previous behavior when section offsets are
21217 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21218 then mark this symbol as LOC_STATIC. */
21220 if (attr_form_is_block (attr
)
21221 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21222 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21223 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21224 && (DW_BLOCK (attr
)->size
21225 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21227 unsigned int dummy
;
21229 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21230 SYMBOL_VALUE_ADDRESS (sym
) =
21231 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21233 SYMBOL_VALUE_ADDRESS (sym
) =
21234 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21235 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21236 fixup_symbol_section (sym
, objfile
);
21237 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21238 SYMBOL_SECTION (sym
));
21242 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21243 expression evaluator, and use LOC_COMPUTED only when necessary
21244 (i.e. when the value of a register or memory location is
21245 referenced, or a thread-local block, etc.). Then again, it might
21246 not be worthwhile. I'm assuming that it isn't unless performance
21247 or memory numbers show me otherwise. */
21249 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21251 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21252 cu
->has_loclist
= 1;
21255 /* Given a pointer to a DWARF information entry, figure out if we need
21256 to make a symbol table entry for it, and if so, create a new entry
21257 and return a pointer to it.
21258 If TYPE is NULL, determine symbol type from the die, otherwise
21259 used the passed type.
21260 If SPACE is not NULL, use it to hold the new symbol. If it is
21261 NULL, allocate a new symbol on the objfile's obstack. */
21263 static struct symbol
*
21264 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21265 struct symbol
*space
)
21267 struct dwarf2_per_objfile
*dwarf2_per_objfile
21268 = cu
->per_cu
->dwarf2_per_objfile
;
21269 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21270 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21271 struct symbol
*sym
= NULL
;
21273 struct attribute
*attr
= NULL
;
21274 struct attribute
*attr2
= NULL
;
21275 CORE_ADDR baseaddr
;
21276 struct pending
**list_to_add
= NULL
;
21278 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21280 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21282 name
= dwarf2_name (die
, cu
);
21285 const char *linkagename
;
21286 int suppress_add
= 0;
21291 sym
= allocate_symbol (objfile
);
21292 OBJSTAT (objfile
, n_syms
++);
21294 /* Cache this symbol's name and the name's demangled form (if any). */
21295 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21296 linkagename
= dwarf2_physname (name
, die
, cu
);
21297 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21299 /* Fortran does not have mangling standard and the mangling does differ
21300 between gfortran, iFort etc. */
21301 if (cu
->language
== language_fortran
21302 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21303 symbol_set_demangled_name (&(sym
->ginfo
),
21304 dwarf2_full_name (name
, die
, cu
),
21307 /* Default assumptions.
21308 Use the passed type or decode it from the die. */
21309 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21310 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21312 SYMBOL_TYPE (sym
) = type
;
21314 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21315 attr
= dwarf2_attr (die
,
21316 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21320 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21323 attr
= dwarf2_attr (die
,
21324 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21328 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21329 struct file_entry
*fe
;
21331 if (cu
->line_header
!= NULL
)
21332 fe
= cu
->line_header
->file_name_at (file_index
);
21337 complaint (&symfile_complaints
,
21338 _("file index out of range"));
21340 symbol_set_symtab (sym
, fe
->symtab
);
21346 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21351 addr
= attr_value_as_address (attr
);
21352 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21353 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21355 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21356 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21357 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21358 add_symbol_to_list (sym
, cu
->list_in_scope
);
21360 case DW_TAG_subprogram
:
21361 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21363 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21364 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21365 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21366 || cu
->language
== language_ada
)
21368 /* Subprograms marked external are stored as a global symbol.
21369 Ada subprograms, whether marked external or not, are always
21370 stored as a global symbol, because we want to be able to
21371 access them globally. For instance, we want to be able
21372 to break on a nested subprogram without having to
21373 specify the context. */
21374 list_to_add
= &global_symbols
;
21378 list_to_add
= cu
->list_in_scope
;
21381 case DW_TAG_inlined_subroutine
:
21382 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21384 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21385 SYMBOL_INLINED (sym
) = 1;
21386 list_to_add
= cu
->list_in_scope
;
21388 case DW_TAG_template_value_param
:
21390 /* Fall through. */
21391 case DW_TAG_constant
:
21392 case DW_TAG_variable
:
21393 case DW_TAG_member
:
21394 /* Compilation with minimal debug info may result in
21395 variables with missing type entries. Change the
21396 misleading `void' type to something sensible. */
21397 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21398 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21400 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21401 /* In the case of DW_TAG_member, we should only be called for
21402 static const members. */
21403 if (die
->tag
== DW_TAG_member
)
21405 /* dwarf2_add_field uses die_is_declaration,
21406 so we do the same. */
21407 gdb_assert (die_is_declaration (die
, cu
));
21412 dwarf2_const_value (attr
, sym
, cu
);
21413 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21416 if (attr2
&& (DW_UNSND (attr2
) != 0))
21417 list_to_add
= &global_symbols
;
21419 list_to_add
= cu
->list_in_scope
;
21423 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21426 var_decode_location (attr
, sym
, cu
);
21427 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21429 /* Fortran explicitly imports any global symbols to the local
21430 scope by DW_TAG_common_block. */
21431 if (cu
->language
== language_fortran
&& die
->parent
21432 && die
->parent
->tag
== DW_TAG_common_block
)
21435 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21436 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21437 && !dwarf2_per_objfile
->has_section_at_zero
)
21439 /* When a static variable is eliminated by the linker,
21440 the corresponding debug information is not stripped
21441 out, but the variable address is set to null;
21442 do not add such variables into symbol table. */
21444 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21446 /* Workaround gfortran PR debug/40040 - it uses
21447 DW_AT_location for variables in -fPIC libraries which may
21448 get overriden by other libraries/executable and get
21449 a different address. Resolve it by the minimal symbol
21450 which may come from inferior's executable using copy
21451 relocation. Make this workaround only for gfortran as for
21452 other compilers GDB cannot guess the minimal symbol
21453 Fortran mangling kind. */
21454 if (cu
->language
== language_fortran
&& die
->parent
21455 && die
->parent
->tag
== DW_TAG_module
21457 && startswith (cu
->producer
, "GNU Fortran"))
21458 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21460 /* A variable with DW_AT_external is never static,
21461 but it may be block-scoped. */
21462 list_to_add
= (cu
->list_in_scope
== &file_symbols
21463 ? &global_symbols
: cu
->list_in_scope
);
21466 list_to_add
= cu
->list_in_scope
;
21470 /* We do not know the address of this symbol.
21471 If it is an external symbol and we have type information
21472 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21473 The address of the variable will then be determined from
21474 the minimal symbol table whenever the variable is
21476 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21478 /* Fortran explicitly imports any global symbols to the local
21479 scope by DW_TAG_common_block. */
21480 if (cu
->language
== language_fortran
&& die
->parent
21481 && die
->parent
->tag
== DW_TAG_common_block
)
21483 /* SYMBOL_CLASS doesn't matter here because
21484 read_common_block is going to reset it. */
21486 list_to_add
= cu
->list_in_scope
;
21488 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21489 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21491 /* A variable with DW_AT_external is never static, but it
21492 may be block-scoped. */
21493 list_to_add
= (cu
->list_in_scope
== &file_symbols
21494 ? &global_symbols
: cu
->list_in_scope
);
21496 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21498 else if (!die_is_declaration (die
, cu
))
21500 /* Use the default LOC_OPTIMIZED_OUT class. */
21501 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21503 list_to_add
= cu
->list_in_scope
;
21507 case DW_TAG_formal_parameter
:
21508 /* If we are inside a function, mark this as an argument. If
21509 not, we might be looking at an argument to an inlined function
21510 when we do not have enough information to show inlined frames;
21511 pretend it's a local variable in that case so that the user can
21513 if (context_stack_depth
> 0
21514 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21515 SYMBOL_IS_ARGUMENT (sym
) = 1;
21516 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21519 var_decode_location (attr
, sym
, cu
);
21521 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21524 dwarf2_const_value (attr
, sym
, cu
);
21527 list_to_add
= cu
->list_in_scope
;
21529 case DW_TAG_unspecified_parameters
:
21530 /* From varargs functions; gdb doesn't seem to have any
21531 interest in this information, so just ignore it for now.
21534 case DW_TAG_template_type_param
:
21536 /* Fall through. */
21537 case DW_TAG_class_type
:
21538 case DW_TAG_interface_type
:
21539 case DW_TAG_structure_type
:
21540 case DW_TAG_union_type
:
21541 case DW_TAG_set_type
:
21542 case DW_TAG_enumeration_type
:
21543 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21544 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21547 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21548 really ever be static objects: otherwise, if you try
21549 to, say, break of a class's method and you're in a file
21550 which doesn't mention that class, it won't work unless
21551 the check for all static symbols in lookup_symbol_aux
21552 saves you. See the OtherFileClass tests in
21553 gdb.c++/namespace.exp. */
21557 list_to_add
= (cu
->list_in_scope
== &file_symbols
21558 && cu
->language
== language_cplus
21559 ? &global_symbols
: cu
->list_in_scope
);
21561 /* The semantics of C++ state that "struct foo {
21562 ... }" also defines a typedef for "foo". */
21563 if (cu
->language
== language_cplus
21564 || cu
->language
== language_ada
21565 || cu
->language
== language_d
21566 || cu
->language
== language_rust
)
21568 /* The symbol's name is already allocated along
21569 with this objfile, so we don't need to
21570 duplicate it for the type. */
21571 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21572 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21577 case DW_TAG_typedef
:
21578 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21579 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21580 list_to_add
= cu
->list_in_scope
;
21582 case DW_TAG_base_type
:
21583 case DW_TAG_subrange_type
:
21584 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21585 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21586 list_to_add
= cu
->list_in_scope
;
21588 case DW_TAG_enumerator
:
21589 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21592 dwarf2_const_value (attr
, sym
, cu
);
21595 /* NOTE: carlton/2003-11-10: See comment above in the
21596 DW_TAG_class_type, etc. block. */
21598 list_to_add
= (cu
->list_in_scope
== &file_symbols
21599 && cu
->language
== language_cplus
21600 ? &global_symbols
: cu
->list_in_scope
);
21603 case DW_TAG_imported_declaration
:
21604 case DW_TAG_namespace
:
21605 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21606 list_to_add
= &global_symbols
;
21608 case DW_TAG_module
:
21609 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21610 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21611 list_to_add
= &global_symbols
;
21613 case DW_TAG_common_block
:
21614 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21615 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21616 add_symbol_to_list (sym
, cu
->list_in_scope
);
21619 /* Not a tag we recognize. Hopefully we aren't processing
21620 trash data, but since we must specifically ignore things
21621 we don't recognize, there is nothing else we should do at
21623 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21624 dwarf_tag_name (die
->tag
));
21630 sym
->hash_next
= objfile
->template_symbols
;
21631 objfile
->template_symbols
= sym
;
21632 list_to_add
= NULL
;
21635 if (list_to_add
!= NULL
)
21636 add_symbol_to_list (sym
, list_to_add
);
21638 /* For the benefit of old versions of GCC, check for anonymous
21639 namespaces based on the demangled name. */
21640 if (!cu
->processing_has_namespace_info
21641 && cu
->language
== language_cplus
)
21642 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21647 /* Given an attr with a DW_FORM_dataN value in host byte order,
21648 zero-extend it as appropriate for the symbol's type. The DWARF
21649 standard (v4) is not entirely clear about the meaning of using
21650 DW_FORM_dataN for a constant with a signed type, where the type is
21651 wider than the data. The conclusion of a discussion on the DWARF
21652 list was that this is unspecified. We choose to always zero-extend
21653 because that is the interpretation long in use by GCC. */
21656 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21657 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21659 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21660 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21661 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21662 LONGEST l
= DW_UNSND (attr
);
21664 if (bits
< sizeof (*value
) * 8)
21666 l
&= ((LONGEST
) 1 << bits
) - 1;
21669 else if (bits
== sizeof (*value
) * 8)
21673 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21674 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21681 /* Read a constant value from an attribute. Either set *VALUE, or if
21682 the value does not fit in *VALUE, set *BYTES - either already
21683 allocated on the objfile obstack, or newly allocated on OBSTACK,
21684 or, set *BATON, if we translated the constant to a location
21688 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21689 const char *name
, struct obstack
*obstack
,
21690 struct dwarf2_cu
*cu
,
21691 LONGEST
*value
, const gdb_byte
**bytes
,
21692 struct dwarf2_locexpr_baton
**baton
)
21694 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21695 struct comp_unit_head
*cu_header
= &cu
->header
;
21696 struct dwarf_block
*blk
;
21697 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21698 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21704 switch (attr
->form
)
21707 case DW_FORM_GNU_addr_index
:
21711 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21712 dwarf2_const_value_length_mismatch_complaint (name
,
21713 cu_header
->addr_size
,
21714 TYPE_LENGTH (type
));
21715 /* Symbols of this form are reasonably rare, so we just
21716 piggyback on the existing location code rather than writing
21717 a new implementation of symbol_computed_ops. */
21718 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21719 (*baton
)->per_cu
= cu
->per_cu
;
21720 gdb_assert ((*baton
)->per_cu
);
21722 (*baton
)->size
= 2 + cu_header
->addr_size
;
21723 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21724 (*baton
)->data
= data
;
21726 data
[0] = DW_OP_addr
;
21727 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21728 byte_order
, DW_ADDR (attr
));
21729 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21732 case DW_FORM_string
:
21734 case DW_FORM_GNU_str_index
:
21735 case DW_FORM_GNU_strp_alt
:
21736 /* DW_STRING is already allocated on the objfile obstack, point
21738 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21740 case DW_FORM_block1
:
21741 case DW_FORM_block2
:
21742 case DW_FORM_block4
:
21743 case DW_FORM_block
:
21744 case DW_FORM_exprloc
:
21745 case DW_FORM_data16
:
21746 blk
= DW_BLOCK (attr
);
21747 if (TYPE_LENGTH (type
) != blk
->size
)
21748 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21749 TYPE_LENGTH (type
));
21750 *bytes
= blk
->data
;
21753 /* The DW_AT_const_value attributes are supposed to carry the
21754 symbol's value "represented as it would be on the target
21755 architecture." By the time we get here, it's already been
21756 converted to host endianness, so we just need to sign- or
21757 zero-extend it as appropriate. */
21758 case DW_FORM_data1
:
21759 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21761 case DW_FORM_data2
:
21762 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21764 case DW_FORM_data4
:
21765 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21767 case DW_FORM_data8
:
21768 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21771 case DW_FORM_sdata
:
21772 case DW_FORM_implicit_const
:
21773 *value
= DW_SND (attr
);
21776 case DW_FORM_udata
:
21777 *value
= DW_UNSND (attr
);
21781 complaint (&symfile_complaints
,
21782 _("unsupported const value attribute form: '%s'"),
21783 dwarf_form_name (attr
->form
));
21790 /* Copy constant value from an attribute to a symbol. */
21793 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21794 struct dwarf2_cu
*cu
)
21796 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21798 const gdb_byte
*bytes
;
21799 struct dwarf2_locexpr_baton
*baton
;
21801 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21802 SYMBOL_PRINT_NAME (sym
),
21803 &objfile
->objfile_obstack
, cu
,
21804 &value
, &bytes
, &baton
);
21808 SYMBOL_LOCATION_BATON (sym
) = baton
;
21809 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21811 else if (bytes
!= NULL
)
21813 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21814 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21818 SYMBOL_VALUE (sym
) = value
;
21819 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21823 /* Return the type of the die in question using its DW_AT_type attribute. */
21825 static struct type
*
21826 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21828 struct attribute
*type_attr
;
21830 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21833 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21834 /* A missing DW_AT_type represents a void type. */
21835 return objfile_type (objfile
)->builtin_void
;
21838 return lookup_die_type (die
, type_attr
, cu
);
21841 /* True iff CU's producer generates GNAT Ada auxiliary information
21842 that allows to find parallel types through that information instead
21843 of having to do expensive parallel lookups by type name. */
21846 need_gnat_info (struct dwarf2_cu
*cu
)
21848 /* Assume that the Ada compiler was GNAT, which always produces
21849 the auxiliary information. */
21850 return (cu
->language
== language_ada
);
21853 /* Return the auxiliary type of the die in question using its
21854 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21855 attribute is not present. */
21857 static struct type
*
21858 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21860 struct attribute
*type_attr
;
21862 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21866 return lookup_die_type (die
, type_attr
, cu
);
21869 /* If DIE has a descriptive_type attribute, then set the TYPE's
21870 descriptive type accordingly. */
21873 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21874 struct dwarf2_cu
*cu
)
21876 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21878 if (descriptive_type
)
21880 ALLOCATE_GNAT_AUX_TYPE (type
);
21881 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21885 /* Return the containing type of the die in question using its
21886 DW_AT_containing_type attribute. */
21888 static struct type
*
21889 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21891 struct attribute
*type_attr
;
21892 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21894 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21896 error (_("Dwarf Error: Problem turning containing type into gdb type "
21897 "[in module %s]"), objfile_name (objfile
));
21899 return lookup_die_type (die
, type_attr
, cu
);
21902 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21904 static struct type
*
21905 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21907 struct dwarf2_per_objfile
*dwarf2_per_objfile
21908 = cu
->per_cu
->dwarf2_per_objfile
;
21909 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21910 char *message
, *saved
;
21912 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
21913 objfile_name (objfile
),
21914 to_underlying (cu
->header
.sect_off
),
21915 to_underlying (die
->sect_off
));
21916 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21917 message
, strlen (message
));
21920 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21923 /* Look up the type of DIE in CU using its type attribute ATTR.
21924 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21925 DW_AT_containing_type.
21926 If there is no type substitute an error marker. */
21928 static struct type
*
21929 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21930 struct dwarf2_cu
*cu
)
21932 struct dwarf2_per_objfile
*dwarf2_per_objfile
21933 = cu
->per_cu
->dwarf2_per_objfile
;
21934 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21935 struct type
*this_type
;
21937 gdb_assert (attr
->name
== DW_AT_type
21938 || attr
->name
== DW_AT_GNAT_descriptive_type
21939 || attr
->name
== DW_AT_containing_type
);
21941 /* First see if we have it cached. */
21943 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21945 struct dwarf2_per_cu_data
*per_cu
;
21946 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21948 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21949 dwarf2_per_objfile
);
21950 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21952 else if (attr_form_is_ref (attr
))
21954 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21956 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21958 else if (attr
->form
== DW_FORM_ref_sig8
)
21960 ULONGEST signature
= DW_SIGNATURE (attr
);
21962 return get_signatured_type (die
, signature
, cu
);
21966 complaint (&symfile_complaints
,
21967 _("Dwarf Error: Bad type attribute %s in DIE"
21968 " at 0x%x [in module %s]"),
21969 dwarf_attr_name (attr
->name
), to_underlying (die
->sect_off
),
21970 objfile_name (objfile
));
21971 return build_error_marker_type (cu
, die
);
21974 /* If not cached we need to read it in. */
21976 if (this_type
== NULL
)
21978 struct die_info
*type_die
= NULL
;
21979 struct dwarf2_cu
*type_cu
= cu
;
21981 if (attr_form_is_ref (attr
))
21982 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21983 if (type_die
== NULL
)
21984 return build_error_marker_type (cu
, die
);
21985 /* If we find the type now, it's probably because the type came
21986 from an inter-CU reference and the type's CU got expanded before
21988 this_type
= read_type_die (type_die
, type_cu
);
21991 /* If we still don't have a type use an error marker. */
21993 if (this_type
== NULL
)
21994 return build_error_marker_type (cu
, die
);
21999 /* Return the type in DIE, CU.
22000 Returns NULL for invalid types.
22002 This first does a lookup in die_type_hash,
22003 and only reads the die in if necessary.
22005 NOTE: This can be called when reading in partial or full symbols. */
22007 static struct type
*
22008 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22010 struct type
*this_type
;
22012 this_type
= get_die_type (die
, cu
);
22016 return read_type_die_1 (die
, cu
);
22019 /* Read the type in DIE, CU.
22020 Returns NULL for invalid types. */
22022 static struct type
*
22023 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22025 struct type
*this_type
= NULL
;
22029 case DW_TAG_class_type
:
22030 case DW_TAG_interface_type
:
22031 case DW_TAG_structure_type
:
22032 case DW_TAG_union_type
:
22033 this_type
= read_structure_type (die
, cu
);
22035 case DW_TAG_enumeration_type
:
22036 this_type
= read_enumeration_type (die
, cu
);
22038 case DW_TAG_subprogram
:
22039 case DW_TAG_subroutine_type
:
22040 case DW_TAG_inlined_subroutine
:
22041 this_type
= read_subroutine_type (die
, cu
);
22043 case DW_TAG_array_type
:
22044 this_type
= read_array_type (die
, cu
);
22046 case DW_TAG_set_type
:
22047 this_type
= read_set_type (die
, cu
);
22049 case DW_TAG_pointer_type
:
22050 this_type
= read_tag_pointer_type (die
, cu
);
22052 case DW_TAG_ptr_to_member_type
:
22053 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22055 case DW_TAG_reference_type
:
22056 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22058 case DW_TAG_rvalue_reference_type
:
22059 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22061 case DW_TAG_const_type
:
22062 this_type
= read_tag_const_type (die
, cu
);
22064 case DW_TAG_volatile_type
:
22065 this_type
= read_tag_volatile_type (die
, cu
);
22067 case DW_TAG_restrict_type
:
22068 this_type
= read_tag_restrict_type (die
, cu
);
22070 case DW_TAG_string_type
:
22071 this_type
= read_tag_string_type (die
, cu
);
22073 case DW_TAG_typedef
:
22074 this_type
= read_typedef (die
, cu
);
22076 case DW_TAG_subrange_type
:
22077 this_type
= read_subrange_type (die
, cu
);
22079 case DW_TAG_base_type
:
22080 this_type
= read_base_type (die
, cu
);
22082 case DW_TAG_unspecified_type
:
22083 this_type
= read_unspecified_type (die
, cu
);
22085 case DW_TAG_namespace
:
22086 this_type
= read_namespace_type (die
, cu
);
22088 case DW_TAG_module
:
22089 this_type
= read_module_type (die
, cu
);
22091 case DW_TAG_atomic_type
:
22092 this_type
= read_tag_atomic_type (die
, cu
);
22095 complaint (&symfile_complaints
,
22096 _("unexpected tag in read_type_die: '%s'"),
22097 dwarf_tag_name (die
->tag
));
22104 /* See if we can figure out if the class lives in a namespace. We do
22105 this by looking for a member function; its demangled name will
22106 contain namespace info, if there is any.
22107 Return the computed name or NULL.
22108 Space for the result is allocated on the objfile's obstack.
22109 This is the full-die version of guess_partial_die_structure_name.
22110 In this case we know DIE has no useful parent. */
22113 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22115 struct die_info
*spec_die
;
22116 struct dwarf2_cu
*spec_cu
;
22117 struct die_info
*child
;
22118 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22121 spec_die
= die_specification (die
, &spec_cu
);
22122 if (spec_die
!= NULL
)
22128 for (child
= die
->child
;
22130 child
= child
->sibling
)
22132 if (child
->tag
== DW_TAG_subprogram
)
22134 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22136 if (linkage_name
!= NULL
)
22139 = language_class_name_from_physname (cu
->language_defn
,
22143 if (actual_name
!= NULL
)
22145 const char *die_name
= dwarf2_name (die
, cu
);
22147 if (die_name
!= NULL
22148 && strcmp (die_name
, actual_name
) != 0)
22150 /* Strip off the class name from the full name.
22151 We want the prefix. */
22152 int die_name_len
= strlen (die_name
);
22153 int actual_name_len
= strlen (actual_name
);
22155 /* Test for '::' as a sanity check. */
22156 if (actual_name_len
> die_name_len
+ 2
22157 && actual_name
[actual_name_len
22158 - die_name_len
- 1] == ':')
22159 name
= (char *) obstack_copy0 (
22160 &objfile
->per_bfd
->storage_obstack
,
22161 actual_name
, actual_name_len
- die_name_len
- 2);
22164 xfree (actual_name
);
22173 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22174 prefix part in such case. See
22175 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22177 static const char *
22178 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22180 struct attribute
*attr
;
22183 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22184 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22187 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22190 attr
= dw2_linkage_name_attr (die
, cu
);
22191 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22194 /* dwarf2_name had to be already called. */
22195 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22197 /* Strip the base name, keep any leading namespaces/classes. */
22198 base
= strrchr (DW_STRING (attr
), ':');
22199 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22202 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22203 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22205 &base
[-1] - DW_STRING (attr
));
22208 /* Return the name of the namespace/class that DIE is defined within,
22209 or "" if we can't tell. The caller should not xfree the result.
22211 For example, if we're within the method foo() in the following
22221 then determine_prefix on foo's die will return "N::C". */
22223 static const char *
22224 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22226 struct dwarf2_per_objfile
*dwarf2_per_objfile
22227 = cu
->per_cu
->dwarf2_per_objfile
;
22228 struct die_info
*parent
, *spec_die
;
22229 struct dwarf2_cu
*spec_cu
;
22230 struct type
*parent_type
;
22231 const char *retval
;
22233 if (cu
->language
!= language_cplus
22234 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22235 && cu
->language
!= language_rust
)
22238 retval
= anonymous_struct_prefix (die
, cu
);
22242 /* We have to be careful in the presence of DW_AT_specification.
22243 For example, with GCC 3.4, given the code
22247 // Definition of N::foo.
22251 then we'll have a tree of DIEs like this:
22253 1: DW_TAG_compile_unit
22254 2: DW_TAG_namespace // N
22255 3: DW_TAG_subprogram // declaration of N::foo
22256 4: DW_TAG_subprogram // definition of N::foo
22257 DW_AT_specification // refers to die #3
22259 Thus, when processing die #4, we have to pretend that we're in
22260 the context of its DW_AT_specification, namely the contex of die
22263 spec_die
= die_specification (die
, &spec_cu
);
22264 if (spec_die
== NULL
)
22265 parent
= die
->parent
;
22268 parent
= spec_die
->parent
;
22272 if (parent
== NULL
)
22274 else if (parent
->building_fullname
)
22277 const char *parent_name
;
22279 /* It has been seen on RealView 2.2 built binaries,
22280 DW_TAG_template_type_param types actually _defined_ as
22281 children of the parent class:
22284 template class <class Enum> Class{};
22285 Class<enum E> class_e;
22287 1: DW_TAG_class_type (Class)
22288 2: DW_TAG_enumeration_type (E)
22289 3: DW_TAG_enumerator (enum1:0)
22290 3: DW_TAG_enumerator (enum2:1)
22292 2: DW_TAG_template_type_param
22293 DW_AT_type DW_FORM_ref_udata (E)
22295 Besides being broken debug info, it can put GDB into an
22296 infinite loop. Consider:
22298 When we're building the full name for Class<E>, we'll start
22299 at Class, and go look over its template type parameters,
22300 finding E. We'll then try to build the full name of E, and
22301 reach here. We're now trying to build the full name of E,
22302 and look over the parent DIE for containing scope. In the
22303 broken case, if we followed the parent DIE of E, we'd again
22304 find Class, and once again go look at its template type
22305 arguments, etc., etc. Simply don't consider such parent die
22306 as source-level parent of this die (it can't be, the language
22307 doesn't allow it), and break the loop here. */
22308 name
= dwarf2_name (die
, cu
);
22309 parent_name
= dwarf2_name (parent
, cu
);
22310 complaint (&symfile_complaints
,
22311 _("template param type '%s' defined within parent '%s'"),
22312 name
? name
: "<unknown>",
22313 parent_name
? parent_name
: "<unknown>");
22317 switch (parent
->tag
)
22319 case DW_TAG_namespace
:
22320 parent_type
= read_type_die (parent
, cu
);
22321 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22322 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22323 Work around this problem here. */
22324 if (cu
->language
== language_cplus
22325 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22327 /* We give a name to even anonymous namespaces. */
22328 return TYPE_TAG_NAME (parent_type
);
22329 case DW_TAG_class_type
:
22330 case DW_TAG_interface_type
:
22331 case DW_TAG_structure_type
:
22332 case DW_TAG_union_type
:
22333 case DW_TAG_module
:
22334 parent_type
= read_type_die (parent
, cu
);
22335 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22336 return TYPE_TAG_NAME (parent_type
);
22338 /* An anonymous structure is only allowed non-static data
22339 members; no typedefs, no member functions, et cetera.
22340 So it does not need a prefix. */
22342 case DW_TAG_compile_unit
:
22343 case DW_TAG_partial_unit
:
22344 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22345 if (cu
->language
== language_cplus
22346 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22347 && die
->child
!= NULL
22348 && (die
->tag
== DW_TAG_class_type
22349 || die
->tag
== DW_TAG_structure_type
22350 || die
->tag
== DW_TAG_union_type
))
22352 char *name
= guess_full_die_structure_name (die
, cu
);
22357 case DW_TAG_enumeration_type
:
22358 parent_type
= read_type_die (parent
, cu
);
22359 if (TYPE_DECLARED_CLASS (parent_type
))
22361 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22362 return TYPE_TAG_NAME (parent_type
);
22365 /* Fall through. */
22367 return determine_prefix (parent
, cu
);
22371 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22372 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22373 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22374 an obconcat, otherwise allocate storage for the result. The CU argument is
22375 used to determine the language and hence, the appropriate separator. */
22377 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22380 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22381 int physname
, struct dwarf2_cu
*cu
)
22383 const char *lead
= "";
22386 if (suffix
== NULL
|| suffix
[0] == '\0'
22387 || prefix
== NULL
|| prefix
[0] == '\0')
22389 else if (cu
->language
== language_d
)
22391 /* For D, the 'main' function could be defined in any module, but it
22392 should never be prefixed. */
22393 if (strcmp (suffix
, "D main") == 0)
22401 else if (cu
->language
== language_fortran
&& physname
)
22403 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22404 DW_AT_MIPS_linkage_name is preferred and used instead. */
22412 if (prefix
== NULL
)
22414 if (suffix
== NULL
)
22421 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22423 strcpy (retval
, lead
);
22424 strcat (retval
, prefix
);
22425 strcat (retval
, sep
);
22426 strcat (retval
, suffix
);
22431 /* We have an obstack. */
22432 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22436 /* Return sibling of die, NULL if no sibling. */
22438 static struct die_info
*
22439 sibling_die (struct die_info
*die
)
22441 return die
->sibling
;
22444 /* Get name of a die, return NULL if not found. */
22446 static const char *
22447 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22448 struct obstack
*obstack
)
22450 if (name
&& cu
->language
== language_cplus
)
22452 std::string canon_name
= cp_canonicalize_string (name
);
22454 if (!canon_name
.empty ())
22456 if (canon_name
!= name
)
22457 name
= (const char *) obstack_copy0 (obstack
,
22458 canon_name
.c_str (),
22459 canon_name
.length ());
22466 /* Get name of a die, return NULL if not found.
22467 Anonymous namespaces are converted to their magic string. */
22469 static const char *
22470 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22472 struct attribute
*attr
;
22473 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22475 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22476 if ((!attr
|| !DW_STRING (attr
))
22477 && die
->tag
!= DW_TAG_namespace
22478 && die
->tag
!= DW_TAG_class_type
22479 && die
->tag
!= DW_TAG_interface_type
22480 && die
->tag
!= DW_TAG_structure_type
22481 && die
->tag
!= DW_TAG_union_type
)
22486 case DW_TAG_compile_unit
:
22487 case DW_TAG_partial_unit
:
22488 /* Compilation units have a DW_AT_name that is a filename, not
22489 a source language identifier. */
22490 case DW_TAG_enumeration_type
:
22491 case DW_TAG_enumerator
:
22492 /* These tags always have simple identifiers already; no need
22493 to canonicalize them. */
22494 return DW_STRING (attr
);
22496 case DW_TAG_namespace
:
22497 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22498 return DW_STRING (attr
);
22499 return CP_ANONYMOUS_NAMESPACE_STR
;
22501 case DW_TAG_class_type
:
22502 case DW_TAG_interface_type
:
22503 case DW_TAG_structure_type
:
22504 case DW_TAG_union_type
:
22505 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22506 structures or unions. These were of the form "._%d" in GCC 4.1,
22507 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22508 and GCC 4.4. We work around this problem by ignoring these. */
22509 if (attr
&& DW_STRING (attr
)
22510 && (startswith (DW_STRING (attr
), "._")
22511 || startswith (DW_STRING (attr
), "<anonymous")))
22514 /* GCC might emit a nameless typedef that has a linkage name. See
22515 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22516 if (!attr
|| DW_STRING (attr
) == NULL
)
22518 char *demangled
= NULL
;
22520 attr
= dw2_linkage_name_attr (die
, cu
);
22521 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22524 /* Avoid demangling DW_STRING (attr) the second time on a second
22525 call for the same DIE. */
22526 if (!DW_STRING_IS_CANONICAL (attr
))
22527 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22533 /* FIXME: we already did this for the partial symbol... */
22536 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22537 demangled
, strlen (demangled
)));
22538 DW_STRING_IS_CANONICAL (attr
) = 1;
22541 /* Strip any leading namespaces/classes, keep only the base name.
22542 DW_AT_name for named DIEs does not contain the prefixes. */
22543 base
= strrchr (DW_STRING (attr
), ':');
22544 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22547 return DW_STRING (attr
);
22556 if (!DW_STRING_IS_CANONICAL (attr
))
22559 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22560 &objfile
->per_bfd
->storage_obstack
);
22561 DW_STRING_IS_CANONICAL (attr
) = 1;
22563 return DW_STRING (attr
);
22566 /* Return the die that this die in an extension of, or NULL if there
22567 is none. *EXT_CU is the CU containing DIE on input, and the CU
22568 containing the return value on output. */
22570 static struct die_info
*
22571 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22573 struct attribute
*attr
;
22575 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22579 return follow_die_ref (die
, attr
, ext_cu
);
22582 /* Convert a DIE tag into its string name. */
22584 static const char *
22585 dwarf_tag_name (unsigned tag
)
22587 const char *name
= get_DW_TAG_name (tag
);
22590 return "DW_TAG_<unknown>";
22595 /* Convert a DWARF attribute code into its string name. */
22597 static const char *
22598 dwarf_attr_name (unsigned attr
)
22602 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22603 if (attr
== DW_AT_MIPS_fde
)
22604 return "DW_AT_MIPS_fde";
22606 if (attr
== DW_AT_HP_block_index
)
22607 return "DW_AT_HP_block_index";
22610 name
= get_DW_AT_name (attr
);
22613 return "DW_AT_<unknown>";
22618 /* Convert a DWARF value form code into its string name. */
22620 static const char *
22621 dwarf_form_name (unsigned form
)
22623 const char *name
= get_DW_FORM_name (form
);
22626 return "DW_FORM_<unknown>";
22631 static const char *
22632 dwarf_bool_name (unsigned mybool
)
22640 /* Convert a DWARF type code into its string name. */
22642 static const char *
22643 dwarf_type_encoding_name (unsigned enc
)
22645 const char *name
= get_DW_ATE_name (enc
);
22648 return "DW_ATE_<unknown>";
22654 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22658 print_spaces (indent
, f
);
22659 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
22660 dwarf_tag_name (die
->tag
), die
->abbrev
,
22661 to_underlying (die
->sect_off
));
22663 if (die
->parent
!= NULL
)
22665 print_spaces (indent
, f
);
22666 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
22667 to_underlying (die
->parent
->sect_off
));
22670 print_spaces (indent
, f
);
22671 fprintf_unfiltered (f
, " has children: %s\n",
22672 dwarf_bool_name (die
->child
!= NULL
));
22674 print_spaces (indent
, f
);
22675 fprintf_unfiltered (f
, " attributes:\n");
22677 for (i
= 0; i
< die
->num_attrs
; ++i
)
22679 print_spaces (indent
, f
);
22680 fprintf_unfiltered (f
, " %s (%s) ",
22681 dwarf_attr_name (die
->attrs
[i
].name
),
22682 dwarf_form_name (die
->attrs
[i
].form
));
22684 switch (die
->attrs
[i
].form
)
22687 case DW_FORM_GNU_addr_index
:
22688 fprintf_unfiltered (f
, "address: ");
22689 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22691 case DW_FORM_block2
:
22692 case DW_FORM_block4
:
22693 case DW_FORM_block
:
22694 case DW_FORM_block1
:
22695 fprintf_unfiltered (f
, "block: size %s",
22696 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22698 case DW_FORM_exprloc
:
22699 fprintf_unfiltered (f
, "expression: size %s",
22700 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22702 case DW_FORM_data16
:
22703 fprintf_unfiltered (f
, "constant of 16 bytes");
22705 case DW_FORM_ref_addr
:
22706 fprintf_unfiltered (f
, "ref address: ");
22707 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22709 case DW_FORM_GNU_ref_alt
:
22710 fprintf_unfiltered (f
, "alt ref address: ");
22711 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22717 case DW_FORM_ref_udata
:
22718 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22719 (long) (DW_UNSND (&die
->attrs
[i
])));
22721 case DW_FORM_data1
:
22722 case DW_FORM_data2
:
22723 case DW_FORM_data4
:
22724 case DW_FORM_data8
:
22725 case DW_FORM_udata
:
22726 case DW_FORM_sdata
:
22727 fprintf_unfiltered (f
, "constant: %s",
22728 pulongest (DW_UNSND (&die
->attrs
[i
])));
22730 case DW_FORM_sec_offset
:
22731 fprintf_unfiltered (f
, "section offset: %s",
22732 pulongest (DW_UNSND (&die
->attrs
[i
])));
22734 case DW_FORM_ref_sig8
:
22735 fprintf_unfiltered (f
, "signature: %s",
22736 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22738 case DW_FORM_string
:
22740 case DW_FORM_line_strp
:
22741 case DW_FORM_GNU_str_index
:
22742 case DW_FORM_GNU_strp_alt
:
22743 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22744 DW_STRING (&die
->attrs
[i
])
22745 ? DW_STRING (&die
->attrs
[i
]) : "",
22746 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22749 if (DW_UNSND (&die
->attrs
[i
]))
22750 fprintf_unfiltered (f
, "flag: TRUE");
22752 fprintf_unfiltered (f
, "flag: FALSE");
22754 case DW_FORM_flag_present
:
22755 fprintf_unfiltered (f
, "flag: TRUE");
22757 case DW_FORM_indirect
:
22758 /* The reader will have reduced the indirect form to
22759 the "base form" so this form should not occur. */
22760 fprintf_unfiltered (f
,
22761 "unexpected attribute form: DW_FORM_indirect");
22763 case DW_FORM_implicit_const
:
22764 fprintf_unfiltered (f
, "constant: %s",
22765 plongest (DW_SND (&die
->attrs
[i
])));
22768 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22769 die
->attrs
[i
].form
);
22772 fprintf_unfiltered (f
, "\n");
22777 dump_die_for_error (struct die_info
*die
)
22779 dump_die_shallow (gdb_stderr
, 0, die
);
22783 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22785 int indent
= level
* 4;
22787 gdb_assert (die
!= NULL
);
22789 if (level
>= max_level
)
22792 dump_die_shallow (f
, indent
, die
);
22794 if (die
->child
!= NULL
)
22796 print_spaces (indent
, f
);
22797 fprintf_unfiltered (f
, " Children:");
22798 if (level
+ 1 < max_level
)
22800 fprintf_unfiltered (f
, "\n");
22801 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22805 fprintf_unfiltered (f
,
22806 " [not printed, max nesting level reached]\n");
22810 if (die
->sibling
!= NULL
&& level
> 0)
22812 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22816 /* This is called from the pdie macro in gdbinit.in.
22817 It's not static so gcc will keep a copy callable from gdb. */
22820 dump_die (struct die_info
*die
, int max_level
)
22822 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22826 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22830 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22831 to_underlying (die
->sect_off
),
22837 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22841 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22843 if (attr_form_is_ref (attr
))
22844 return (sect_offset
) DW_UNSND (attr
);
22846 complaint (&symfile_complaints
,
22847 _("unsupported die ref attribute form: '%s'"),
22848 dwarf_form_name (attr
->form
));
22852 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22853 * the value held by the attribute is not constant. */
22856 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22858 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22859 return DW_SND (attr
);
22860 else if (attr
->form
== DW_FORM_udata
22861 || attr
->form
== DW_FORM_data1
22862 || attr
->form
== DW_FORM_data2
22863 || attr
->form
== DW_FORM_data4
22864 || attr
->form
== DW_FORM_data8
)
22865 return DW_UNSND (attr
);
22868 /* For DW_FORM_data16 see attr_form_is_constant. */
22869 complaint (&symfile_complaints
,
22870 _("Attribute value is not a constant (%s)"),
22871 dwarf_form_name (attr
->form
));
22872 return default_value
;
22876 /* Follow reference or signature attribute ATTR of SRC_DIE.
22877 On entry *REF_CU is the CU of SRC_DIE.
22878 On exit *REF_CU is the CU of the result. */
22880 static struct die_info
*
22881 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22882 struct dwarf2_cu
**ref_cu
)
22884 struct die_info
*die
;
22886 if (attr_form_is_ref (attr
))
22887 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22888 else if (attr
->form
== DW_FORM_ref_sig8
)
22889 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22892 dump_die_for_error (src_die
);
22893 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22894 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22900 /* Follow reference OFFSET.
22901 On entry *REF_CU is the CU of the source die referencing OFFSET.
22902 On exit *REF_CU is the CU of the result.
22903 Returns NULL if OFFSET is invalid. */
22905 static struct die_info
*
22906 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22907 struct dwarf2_cu
**ref_cu
)
22909 struct die_info temp_die
;
22910 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22911 struct dwarf2_per_objfile
*dwarf2_per_objfile
22912 = cu
->per_cu
->dwarf2_per_objfile
;
22913 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22915 gdb_assert (cu
->per_cu
!= NULL
);
22919 if (cu
->per_cu
->is_debug_types
)
22921 /* .debug_types CUs cannot reference anything outside their CU.
22922 If they need to, they have to reference a signatured type via
22923 DW_FORM_ref_sig8. */
22924 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22927 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22928 || !offset_in_cu_p (&cu
->header
, sect_off
))
22930 struct dwarf2_per_cu_data
*per_cu
;
22932 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22933 dwarf2_per_objfile
);
22935 /* If necessary, add it to the queue and load its DIEs. */
22936 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22937 load_full_comp_unit (per_cu
, cu
->language
);
22939 target_cu
= per_cu
->cu
;
22941 else if (cu
->dies
== NULL
)
22943 /* We're loading full DIEs during partial symbol reading. */
22944 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22945 load_full_comp_unit (cu
->per_cu
, language_minimal
);
22948 *ref_cu
= target_cu
;
22949 temp_die
.sect_off
= sect_off
;
22950 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22952 to_underlying (sect_off
));
22955 /* Follow reference attribute ATTR of SRC_DIE.
22956 On entry *REF_CU is the CU of SRC_DIE.
22957 On exit *REF_CU is the CU of the result. */
22959 static struct die_info
*
22960 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22961 struct dwarf2_cu
**ref_cu
)
22963 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22964 struct dwarf2_cu
*cu
= *ref_cu
;
22965 struct die_info
*die
;
22967 die
= follow_die_offset (sect_off
,
22968 (attr
->form
== DW_FORM_GNU_ref_alt
22969 || cu
->per_cu
->is_dwz
),
22972 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
22973 "at 0x%x [in module %s]"),
22974 to_underlying (sect_off
), to_underlying (src_die
->sect_off
),
22975 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22980 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22981 Returned value is intended for DW_OP_call*. Returned
22982 dwarf2_locexpr_baton->data has lifetime of
22983 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22985 struct dwarf2_locexpr_baton
22986 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22987 struct dwarf2_per_cu_data
*per_cu
,
22988 CORE_ADDR (*get_frame_pc
) (void *baton
),
22991 struct dwarf2_cu
*cu
;
22992 struct die_info
*die
;
22993 struct attribute
*attr
;
22994 struct dwarf2_locexpr_baton retval
;
22995 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22996 struct dwarf2_per_objfile
*dwarf2_per_objfile
22997 = get_dwarf2_per_objfile (objfile
);
22999 if (per_cu
->cu
== NULL
)
23004 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23005 Instead just throw an error, not much else we can do. */
23006 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
23007 to_underlying (sect_off
), objfile_name (objfile
));
23010 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23012 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
23013 to_underlying (sect_off
), objfile_name (objfile
));
23015 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23018 /* DWARF: "If there is no such attribute, then there is no effect.".
23019 DATA is ignored if SIZE is 0. */
23021 retval
.data
= NULL
;
23024 else if (attr_form_is_section_offset (attr
))
23026 struct dwarf2_loclist_baton loclist_baton
;
23027 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23030 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23032 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23034 retval
.size
= size
;
23038 if (!attr_form_is_block (attr
))
23039 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
23040 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23041 to_underlying (sect_off
), objfile_name (objfile
));
23043 retval
.data
= DW_BLOCK (attr
)->data
;
23044 retval
.size
= DW_BLOCK (attr
)->size
;
23046 retval
.per_cu
= cu
->per_cu
;
23048 age_cached_comp_units (dwarf2_per_objfile
);
23053 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23056 struct dwarf2_locexpr_baton
23057 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23058 struct dwarf2_per_cu_data
*per_cu
,
23059 CORE_ADDR (*get_frame_pc
) (void *baton
),
23062 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23064 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23067 /* Write a constant of a given type as target-ordered bytes into
23070 static const gdb_byte
*
23071 write_constant_as_bytes (struct obstack
*obstack
,
23072 enum bfd_endian byte_order
,
23079 *len
= TYPE_LENGTH (type
);
23080 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23081 store_unsigned_integer (result
, *len
, byte_order
, value
);
23086 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23087 pointer to the constant bytes and set LEN to the length of the
23088 data. If memory is needed, allocate it on OBSTACK. If the DIE
23089 does not have a DW_AT_const_value, return NULL. */
23092 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23093 struct dwarf2_per_cu_data
*per_cu
,
23094 struct obstack
*obstack
,
23097 struct dwarf2_cu
*cu
;
23098 struct die_info
*die
;
23099 struct attribute
*attr
;
23100 const gdb_byte
*result
= NULL
;
23103 enum bfd_endian byte_order
;
23104 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23106 if (per_cu
->cu
== NULL
)
23111 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23112 Instead just throw an error, not much else we can do. */
23113 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
23114 to_underlying (sect_off
), objfile_name (objfile
));
23117 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23119 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
23120 to_underlying (sect_off
), objfile_name (objfile
));
23123 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23127 byte_order
= (bfd_big_endian (objfile
->obfd
)
23128 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23130 switch (attr
->form
)
23133 case DW_FORM_GNU_addr_index
:
23137 *len
= cu
->header
.addr_size
;
23138 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23139 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23143 case DW_FORM_string
:
23145 case DW_FORM_GNU_str_index
:
23146 case DW_FORM_GNU_strp_alt
:
23147 /* DW_STRING is already allocated on the objfile obstack, point
23149 result
= (const gdb_byte
*) DW_STRING (attr
);
23150 *len
= strlen (DW_STRING (attr
));
23152 case DW_FORM_block1
:
23153 case DW_FORM_block2
:
23154 case DW_FORM_block4
:
23155 case DW_FORM_block
:
23156 case DW_FORM_exprloc
:
23157 case DW_FORM_data16
:
23158 result
= DW_BLOCK (attr
)->data
;
23159 *len
= DW_BLOCK (attr
)->size
;
23162 /* The DW_AT_const_value attributes are supposed to carry the
23163 symbol's value "represented as it would be on the target
23164 architecture." By the time we get here, it's already been
23165 converted to host endianness, so we just need to sign- or
23166 zero-extend it as appropriate. */
23167 case DW_FORM_data1
:
23168 type
= die_type (die
, cu
);
23169 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23170 if (result
== NULL
)
23171 result
= write_constant_as_bytes (obstack
, byte_order
,
23174 case DW_FORM_data2
:
23175 type
= die_type (die
, cu
);
23176 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23177 if (result
== NULL
)
23178 result
= write_constant_as_bytes (obstack
, byte_order
,
23181 case DW_FORM_data4
:
23182 type
= die_type (die
, cu
);
23183 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23184 if (result
== NULL
)
23185 result
= write_constant_as_bytes (obstack
, byte_order
,
23188 case DW_FORM_data8
:
23189 type
= die_type (die
, cu
);
23190 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23191 if (result
== NULL
)
23192 result
= write_constant_as_bytes (obstack
, byte_order
,
23196 case DW_FORM_sdata
:
23197 case DW_FORM_implicit_const
:
23198 type
= die_type (die
, cu
);
23199 result
= write_constant_as_bytes (obstack
, byte_order
,
23200 type
, DW_SND (attr
), len
);
23203 case DW_FORM_udata
:
23204 type
= die_type (die
, cu
);
23205 result
= write_constant_as_bytes (obstack
, byte_order
,
23206 type
, DW_UNSND (attr
), len
);
23210 complaint (&symfile_complaints
,
23211 _("unsupported const value attribute form: '%s'"),
23212 dwarf_form_name (attr
->form
));
23219 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23220 valid type for this die is found. */
23223 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23224 struct dwarf2_per_cu_data
*per_cu
)
23226 struct dwarf2_cu
*cu
;
23227 struct die_info
*die
;
23229 if (per_cu
->cu
== NULL
)
23235 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23239 return die_type (die
, cu
);
23242 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23246 dwarf2_get_die_type (cu_offset die_offset
,
23247 struct dwarf2_per_cu_data
*per_cu
)
23249 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23250 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23253 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23254 On entry *REF_CU is the CU of SRC_DIE.
23255 On exit *REF_CU is the CU of the result.
23256 Returns NULL if the referenced DIE isn't found. */
23258 static struct die_info
*
23259 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23260 struct dwarf2_cu
**ref_cu
)
23262 struct die_info temp_die
;
23263 struct dwarf2_cu
*sig_cu
;
23264 struct die_info
*die
;
23266 /* While it might be nice to assert sig_type->type == NULL here,
23267 we can get here for DW_AT_imported_declaration where we need
23268 the DIE not the type. */
23270 /* If necessary, add it to the queue and load its DIEs. */
23272 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23273 read_signatured_type (sig_type
);
23275 sig_cu
= sig_type
->per_cu
.cu
;
23276 gdb_assert (sig_cu
!= NULL
);
23277 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23278 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23279 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23280 to_underlying (temp_die
.sect_off
));
23283 struct dwarf2_per_objfile
*dwarf2_per_objfile
23284 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23286 /* For .gdb_index version 7 keep track of included TUs.
23287 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23288 if (dwarf2_per_objfile
->index_table
!= NULL
23289 && dwarf2_per_objfile
->index_table
->version
<= 7)
23291 VEC_safe_push (dwarf2_per_cu_ptr
,
23292 (*ref_cu
)->per_cu
->imported_symtabs
,
23303 /* Follow signatured type referenced by ATTR in SRC_DIE.
23304 On entry *REF_CU is the CU of SRC_DIE.
23305 On exit *REF_CU is the CU of the result.
23306 The result is the DIE of the type.
23307 If the referenced type cannot be found an error is thrown. */
23309 static struct die_info
*
23310 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23311 struct dwarf2_cu
**ref_cu
)
23313 ULONGEST signature
= DW_SIGNATURE (attr
);
23314 struct signatured_type
*sig_type
;
23315 struct die_info
*die
;
23317 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23319 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23320 /* sig_type will be NULL if the signatured type is missing from
23322 if (sig_type
== NULL
)
23324 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23325 " from DIE at 0x%x [in module %s]"),
23326 hex_string (signature
), to_underlying (src_die
->sect_off
),
23327 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23330 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23333 dump_die_for_error (src_die
);
23334 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23335 " from DIE at 0x%x [in module %s]"),
23336 hex_string (signature
), to_underlying (src_die
->sect_off
),
23337 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23343 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23344 reading in and processing the type unit if necessary. */
23346 static struct type
*
23347 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23348 struct dwarf2_cu
*cu
)
23350 struct dwarf2_per_objfile
*dwarf2_per_objfile
23351 = cu
->per_cu
->dwarf2_per_objfile
;
23352 struct signatured_type
*sig_type
;
23353 struct dwarf2_cu
*type_cu
;
23354 struct die_info
*type_die
;
23357 sig_type
= lookup_signatured_type (cu
, signature
);
23358 /* sig_type will be NULL if the signatured type is missing from
23360 if (sig_type
== NULL
)
23362 complaint (&symfile_complaints
,
23363 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23364 " from DIE at 0x%x [in module %s]"),
23365 hex_string (signature
), to_underlying (die
->sect_off
),
23366 objfile_name (dwarf2_per_objfile
->objfile
));
23367 return build_error_marker_type (cu
, die
);
23370 /* If we already know the type we're done. */
23371 if (sig_type
->type
!= NULL
)
23372 return sig_type
->type
;
23375 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23376 if (type_die
!= NULL
)
23378 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23379 is created. This is important, for example, because for c++ classes
23380 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23381 type
= read_type_die (type_die
, type_cu
);
23384 complaint (&symfile_complaints
,
23385 _("Dwarf Error: Cannot build signatured type %s"
23386 " referenced from DIE at 0x%x [in module %s]"),
23387 hex_string (signature
), to_underlying (die
->sect_off
),
23388 objfile_name (dwarf2_per_objfile
->objfile
));
23389 type
= build_error_marker_type (cu
, die
);
23394 complaint (&symfile_complaints
,
23395 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23396 " from DIE at 0x%x [in module %s]"),
23397 hex_string (signature
), to_underlying (die
->sect_off
),
23398 objfile_name (dwarf2_per_objfile
->objfile
));
23399 type
= build_error_marker_type (cu
, die
);
23401 sig_type
->type
= type
;
23406 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23407 reading in and processing the type unit if necessary. */
23409 static struct type
*
23410 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23411 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23413 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23414 if (attr_form_is_ref (attr
))
23416 struct dwarf2_cu
*type_cu
= cu
;
23417 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23419 return read_type_die (type_die
, type_cu
);
23421 else if (attr
->form
== DW_FORM_ref_sig8
)
23423 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23427 struct dwarf2_per_objfile
*dwarf2_per_objfile
23428 = cu
->per_cu
->dwarf2_per_objfile
;
23430 complaint (&symfile_complaints
,
23431 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23432 " at 0x%x [in module %s]"),
23433 dwarf_form_name (attr
->form
), to_underlying (die
->sect_off
),
23434 objfile_name (dwarf2_per_objfile
->objfile
));
23435 return build_error_marker_type (cu
, die
);
23439 /* Load the DIEs associated with type unit PER_CU into memory. */
23442 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23444 struct signatured_type
*sig_type
;
23446 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23447 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23449 /* We have the per_cu, but we need the signatured_type.
23450 Fortunately this is an easy translation. */
23451 gdb_assert (per_cu
->is_debug_types
);
23452 sig_type
= (struct signatured_type
*) per_cu
;
23454 gdb_assert (per_cu
->cu
== NULL
);
23456 read_signatured_type (sig_type
);
23458 gdb_assert (per_cu
->cu
!= NULL
);
23461 /* die_reader_func for read_signatured_type.
23462 This is identical to load_full_comp_unit_reader,
23463 but is kept separate for now. */
23466 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23467 const gdb_byte
*info_ptr
,
23468 struct die_info
*comp_unit_die
,
23472 struct dwarf2_cu
*cu
= reader
->cu
;
23474 gdb_assert (cu
->die_hash
== NULL
);
23476 htab_create_alloc_ex (cu
->header
.length
/ 12,
23480 &cu
->comp_unit_obstack
,
23481 hashtab_obstack_allocate
,
23482 dummy_obstack_deallocate
);
23485 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23486 &info_ptr
, comp_unit_die
);
23487 cu
->dies
= comp_unit_die
;
23488 /* comp_unit_die is not stored in die_hash, no need. */
23490 /* We try not to read any attributes in this function, because not
23491 all CUs needed for references have been loaded yet, and symbol
23492 table processing isn't initialized. But we have to set the CU language,
23493 or we won't be able to build types correctly.
23494 Similarly, if we do not read the producer, we can not apply
23495 producer-specific interpretation. */
23496 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23499 /* Read in a signatured type and build its CU and DIEs.
23500 If the type is a stub for the real type in a DWO file,
23501 read in the real type from the DWO file as well. */
23504 read_signatured_type (struct signatured_type
*sig_type
)
23506 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23508 gdb_assert (per_cu
->is_debug_types
);
23509 gdb_assert (per_cu
->cu
== NULL
);
23511 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
23512 read_signatured_type_reader
, NULL
);
23513 sig_type
->per_cu
.tu_read
= 1;
23516 /* Decode simple location descriptions.
23517 Given a pointer to a dwarf block that defines a location, compute
23518 the location and return the value.
23520 NOTE drow/2003-11-18: This function is called in two situations
23521 now: for the address of static or global variables (partial symbols
23522 only) and for offsets into structures which are expected to be
23523 (more or less) constant. The partial symbol case should go away,
23524 and only the constant case should remain. That will let this
23525 function complain more accurately. A few special modes are allowed
23526 without complaint for global variables (for instance, global
23527 register values and thread-local values).
23529 A location description containing no operations indicates that the
23530 object is optimized out. The return value is 0 for that case.
23531 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23532 callers will only want a very basic result and this can become a
23535 Note that stack[0] is unused except as a default error return. */
23538 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23540 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23542 size_t size
= blk
->size
;
23543 const gdb_byte
*data
= blk
->data
;
23544 CORE_ADDR stack
[64];
23546 unsigned int bytes_read
, unsnd
;
23552 stack
[++stacki
] = 0;
23591 stack
[++stacki
] = op
- DW_OP_lit0
;
23626 stack
[++stacki
] = op
- DW_OP_reg0
;
23628 dwarf2_complex_location_expr_complaint ();
23632 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23634 stack
[++stacki
] = unsnd
;
23636 dwarf2_complex_location_expr_complaint ();
23640 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23645 case DW_OP_const1u
:
23646 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23650 case DW_OP_const1s
:
23651 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23655 case DW_OP_const2u
:
23656 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23660 case DW_OP_const2s
:
23661 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23665 case DW_OP_const4u
:
23666 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23670 case DW_OP_const4s
:
23671 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23675 case DW_OP_const8u
:
23676 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23681 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23687 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23692 stack
[stacki
+ 1] = stack
[stacki
];
23697 stack
[stacki
- 1] += stack
[stacki
];
23701 case DW_OP_plus_uconst
:
23702 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23708 stack
[stacki
- 1] -= stack
[stacki
];
23713 /* If we're not the last op, then we definitely can't encode
23714 this using GDB's address_class enum. This is valid for partial
23715 global symbols, although the variable's address will be bogus
23718 dwarf2_complex_location_expr_complaint ();
23721 case DW_OP_GNU_push_tls_address
:
23722 case DW_OP_form_tls_address
:
23723 /* The top of the stack has the offset from the beginning
23724 of the thread control block at which the variable is located. */
23725 /* Nothing should follow this operator, so the top of stack would
23727 /* This is valid for partial global symbols, but the variable's
23728 address will be bogus in the psymtab. Make it always at least
23729 non-zero to not look as a variable garbage collected by linker
23730 which have DW_OP_addr 0. */
23732 dwarf2_complex_location_expr_complaint ();
23736 case DW_OP_GNU_uninit
:
23739 case DW_OP_GNU_addr_index
:
23740 case DW_OP_GNU_const_index
:
23741 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23748 const char *name
= get_DW_OP_name (op
);
23751 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23754 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23758 return (stack
[stacki
]);
23761 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23762 outside of the allocated space. Also enforce minimum>0. */
23763 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23765 complaint (&symfile_complaints
,
23766 _("location description stack overflow"));
23772 complaint (&symfile_complaints
,
23773 _("location description stack underflow"));
23777 return (stack
[stacki
]);
23780 /* memory allocation interface */
23782 static struct dwarf_block
*
23783 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23785 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23788 static struct die_info
*
23789 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23791 struct die_info
*die
;
23792 size_t size
= sizeof (struct die_info
);
23795 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23797 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23798 memset (die
, 0, sizeof (struct die_info
));
23803 /* Macro support. */
23805 /* Return file name relative to the compilation directory of file number I in
23806 *LH's file name table. The result is allocated using xmalloc; the caller is
23807 responsible for freeing it. */
23810 file_file_name (int file
, struct line_header
*lh
)
23812 /* Is the file number a valid index into the line header's file name
23813 table? Remember that file numbers start with one, not zero. */
23814 if (1 <= file
&& file
<= lh
->file_names
.size ())
23816 const file_entry
&fe
= lh
->file_names
[file
- 1];
23818 if (!IS_ABSOLUTE_PATH (fe
.name
))
23820 const char *dir
= fe
.include_dir (lh
);
23822 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23824 return xstrdup (fe
.name
);
23828 /* The compiler produced a bogus file number. We can at least
23829 record the macro definitions made in the file, even if we
23830 won't be able to find the file by name. */
23831 char fake_name
[80];
23833 xsnprintf (fake_name
, sizeof (fake_name
),
23834 "<bad macro file number %d>", file
);
23836 complaint (&symfile_complaints
,
23837 _("bad file number in macro information (%d)"),
23840 return xstrdup (fake_name
);
23844 /* Return the full name of file number I in *LH's file name table.
23845 Use COMP_DIR as the name of the current directory of the
23846 compilation. The result is allocated using xmalloc; the caller is
23847 responsible for freeing it. */
23849 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23851 /* Is the file number a valid index into the line header's file name
23852 table? Remember that file numbers start with one, not zero. */
23853 if (1 <= file
&& file
<= lh
->file_names
.size ())
23855 char *relative
= file_file_name (file
, lh
);
23857 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23859 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23860 relative
, (char *) NULL
);
23863 return file_file_name (file
, lh
);
23867 static struct macro_source_file
*
23868 macro_start_file (int file
, int line
,
23869 struct macro_source_file
*current_file
,
23870 struct line_header
*lh
)
23872 /* File name relative to the compilation directory of this source file. */
23873 char *file_name
= file_file_name (file
, lh
);
23875 if (! current_file
)
23877 /* Note: We don't create a macro table for this compilation unit
23878 at all until we actually get a filename. */
23879 struct macro_table
*macro_table
= get_macro_table ();
23881 /* If we have no current file, then this must be the start_file
23882 directive for the compilation unit's main source file. */
23883 current_file
= macro_set_main (macro_table
, file_name
);
23884 macro_define_special (macro_table
);
23887 current_file
= macro_include (current_file
, line
, file_name
);
23891 return current_file
;
23894 static const char *
23895 consume_improper_spaces (const char *p
, const char *body
)
23899 complaint (&symfile_complaints
,
23900 _("macro definition contains spaces "
23901 "in formal argument list:\n`%s'"),
23913 parse_macro_definition (struct macro_source_file
*file
, int line
,
23918 /* The body string takes one of two forms. For object-like macro
23919 definitions, it should be:
23921 <macro name> " " <definition>
23923 For function-like macro definitions, it should be:
23925 <macro name> "() " <definition>
23927 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23929 Spaces may appear only where explicitly indicated, and in the
23932 The Dwarf 2 spec says that an object-like macro's name is always
23933 followed by a space, but versions of GCC around March 2002 omit
23934 the space when the macro's definition is the empty string.
23936 The Dwarf 2 spec says that there should be no spaces between the
23937 formal arguments in a function-like macro's formal argument list,
23938 but versions of GCC around March 2002 include spaces after the
23942 /* Find the extent of the macro name. The macro name is terminated
23943 by either a space or null character (for an object-like macro) or
23944 an opening paren (for a function-like macro). */
23945 for (p
= body
; *p
; p
++)
23946 if (*p
== ' ' || *p
== '(')
23949 if (*p
== ' ' || *p
== '\0')
23951 /* It's an object-like macro. */
23952 int name_len
= p
- body
;
23953 char *name
= savestring (body
, name_len
);
23954 const char *replacement
;
23957 replacement
= body
+ name_len
+ 1;
23960 dwarf2_macro_malformed_definition_complaint (body
);
23961 replacement
= body
+ name_len
;
23964 macro_define_object (file
, line
, name
, replacement
);
23968 else if (*p
== '(')
23970 /* It's a function-like macro. */
23971 char *name
= savestring (body
, p
- body
);
23974 char **argv
= XNEWVEC (char *, argv_size
);
23978 p
= consume_improper_spaces (p
, body
);
23980 /* Parse the formal argument list. */
23981 while (*p
&& *p
!= ')')
23983 /* Find the extent of the current argument name. */
23984 const char *arg_start
= p
;
23986 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23989 if (! *p
|| p
== arg_start
)
23990 dwarf2_macro_malformed_definition_complaint (body
);
23993 /* Make sure argv has room for the new argument. */
23994 if (argc
>= argv_size
)
23997 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24000 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24003 p
= consume_improper_spaces (p
, body
);
24005 /* Consume the comma, if present. */
24010 p
= consume_improper_spaces (p
, body
);
24019 /* Perfectly formed definition, no complaints. */
24020 macro_define_function (file
, line
, name
,
24021 argc
, (const char **) argv
,
24023 else if (*p
== '\0')
24025 /* Complain, but do define it. */
24026 dwarf2_macro_malformed_definition_complaint (body
);
24027 macro_define_function (file
, line
, name
,
24028 argc
, (const char **) argv
,
24032 /* Just complain. */
24033 dwarf2_macro_malformed_definition_complaint (body
);
24036 /* Just complain. */
24037 dwarf2_macro_malformed_definition_complaint (body
);
24043 for (i
= 0; i
< argc
; i
++)
24049 dwarf2_macro_malformed_definition_complaint (body
);
24052 /* Skip some bytes from BYTES according to the form given in FORM.
24053 Returns the new pointer. */
24055 static const gdb_byte
*
24056 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24057 enum dwarf_form form
,
24058 unsigned int offset_size
,
24059 struct dwarf2_section_info
*section
)
24061 unsigned int bytes_read
;
24065 case DW_FORM_data1
:
24070 case DW_FORM_data2
:
24074 case DW_FORM_data4
:
24078 case DW_FORM_data8
:
24082 case DW_FORM_data16
:
24086 case DW_FORM_string
:
24087 read_direct_string (abfd
, bytes
, &bytes_read
);
24088 bytes
+= bytes_read
;
24091 case DW_FORM_sec_offset
:
24093 case DW_FORM_GNU_strp_alt
:
24094 bytes
+= offset_size
;
24097 case DW_FORM_block
:
24098 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24099 bytes
+= bytes_read
;
24102 case DW_FORM_block1
:
24103 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24105 case DW_FORM_block2
:
24106 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24108 case DW_FORM_block4
:
24109 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24112 case DW_FORM_sdata
:
24113 case DW_FORM_udata
:
24114 case DW_FORM_GNU_addr_index
:
24115 case DW_FORM_GNU_str_index
:
24116 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24119 dwarf2_section_buffer_overflow_complaint (section
);
24124 case DW_FORM_implicit_const
:
24129 complaint (&symfile_complaints
,
24130 _("invalid form 0x%x in `%s'"),
24131 form
, get_section_name (section
));
24139 /* A helper for dwarf_decode_macros that handles skipping an unknown
24140 opcode. Returns an updated pointer to the macro data buffer; or,
24141 on error, issues a complaint and returns NULL. */
24143 static const gdb_byte
*
24144 skip_unknown_opcode (unsigned int opcode
,
24145 const gdb_byte
**opcode_definitions
,
24146 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24148 unsigned int offset_size
,
24149 struct dwarf2_section_info
*section
)
24151 unsigned int bytes_read
, i
;
24153 const gdb_byte
*defn
;
24155 if (opcode_definitions
[opcode
] == NULL
)
24157 complaint (&symfile_complaints
,
24158 _("unrecognized DW_MACFINO opcode 0x%x"),
24163 defn
= opcode_definitions
[opcode
];
24164 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24165 defn
+= bytes_read
;
24167 for (i
= 0; i
< arg
; ++i
)
24169 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24170 (enum dwarf_form
) defn
[i
], offset_size
,
24172 if (mac_ptr
== NULL
)
24174 /* skip_form_bytes already issued the complaint. */
24182 /* A helper function which parses the header of a macro section.
24183 If the macro section is the extended (for now called "GNU") type,
24184 then this updates *OFFSET_SIZE. Returns a pointer to just after
24185 the header, or issues a complaint and returns NULL on error. */
24187 static const gdb_byte
*
24188 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24190 const gdb_byte
*mac_ptr
,
24191 unsigned int *offset_size
,
24192 int section_is_gnu
)
24194 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24196 if (section_is_gnu
)
24198 unsigned int version
, flags
;
24200 version
= read_2_bytes (abfd
, mac_ptr
);
24201 if (version
!= 4 && version
!= 5)
24203 complaint (&symfile_complaints
,
24204 _("unrecognized version `%d' in .debug_macro section"),
24210 flags
= read_1_byte (abfd
, mac_ptr
);
24212 *offset_size
= (flags
& 1) ? 8 : 4;
24214 if ((flags
& 2) != 0)
24215 /* We don't need the line table offset. */
24216 mac_ptr
+= *offset_size
;
24218 /* Vendor opcode descriptions. */
24219 if ((flags
& 4) != 0)
24221 unsigned int i
, count
;
24223 count
= read_1_byte (abfd
, mac_ptr
);
24225 for (i
= 0; i
< count
; ++i
)
24227 unsigned int opcode
, bytes_read
;
24230 opcode
= read_1_byte (abfd
, mac_ptr
);
24232 opcode_definitions
[opcode
] = mac_ptr
;
24233 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24234 mac_ptr
+= bytes_read
;
24243 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24244 including DW_MACRO_import. */
24247 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24249 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24250 struct macro_source_file
*current_file
,
24251 struct line_header
*lh
,
24252 struct dwarf2_section_info
*section
,
24253 int section_is_gnu
, int section_is_dwz
,
24254 unsigned int offset_size
,
24255 htab_t include_hash
)
24257 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24258 enum dwarf_macro_record_type macinfo_type
;
24259 int at_commandline
;
24260 const gdb_byte
*opcode_definitions
[256];
24262 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24263 &offset_size
, section_is_gnu
);
24264 if (mac_ptr
== NULL
)
24266 /* We already issued a complaint. */
24270 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24271 GDB is still reading the definitions from command line. First
24272 DW_MACINFO_start_file will need to be ignored as it was already executed
24273 to create CURRENT_FILE for the main source holding also the command line
24274 definitions. On first met DW_MACINFO_start_file this flag is reset to
24275 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24277 at_commandline
= 1;
24281 /* Do we at least have room for a macinfo type byte? */
24282 if (mac_ptr
>= mac_end
)
24284 dwarf2_section_buffer_overflow_complaint (section
);
24288 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24291 /* Note that we rely on the fact that the corresponding GNU and
24292 DWARF constants are the same. */
24294 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24295 switch (macinfo_type
)
24297 /* A zero macinfo type indicates the end of the macro
24302 case DW_MACRO_define
:
24303 case DW_MACRO_undef
:
24304 case DW_MACRO_define_strp
:
24305 case DW_MACRO_undef_strp
:
24306 case DW_MACRO_define_sup
:
24307 case DW_MACRO_undef_sup
:
24309 unsigned int bytes_read
;
24314 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24315 mac_ptr
+= bytes_read
;
24317 if (macinfo_type
== DW_MACRO_define
24318 || macinfo_type
== DW_MACRO_undef
)
24320 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24321 mac_ptr
+= bytes_read
;
24325 LONGEST str_offset
;
24327 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24328 mac_ptr
+= offset_size
;
24330 if (macinfo_type
== DW_MACRO_define_sup
24331 || macinfo_type
== DW_MACRO_undef_sup
24334 struct dwz_file
*dwz
24335 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24337 body
= read_indirect_string_from_dwz (objfile
,
24341 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24345 is_define
= (macinfo_type
== DW_MACRO_define
24346 || macinfo_type
== DW_MACRO_define_strp
24347 || macinfo_type
== DW_MACRO_define_sup
);
24348 if (! current_file
)
24350 /* DWARF violation as no main source is present. */
24351 complaint (&symfile_complaints
,
24352 _("debug info with no main source gives macro %s "
24354 is_define
? _("definition") : _("undefinition"),
24358 if ((line
== 0 && !at_commandline
)
24359 || (line
!= 0 && at_commandline
))
24360 complaint (&symfile_complaints
,
24361 _("debug info gives %s macro %s with %s line %d: %s"),
24362 at_commandline
? _("command-line") : _("in-file"),
24363 is_define
? _("definition") : _("undefinition"),
24364 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24367 parse_macro_definition (current_file
, line
, body
);
24370 gdb_assert (macinfo_type
== DW_MACRO_undef
24371 || macinfo_type
== DW_MACRO_undef_strp
24372 || macinfo_type
== DW_MACRO_undef_sup
);
24373 macro_undef (current_file
, line
, body
);
24378 case DW_MACRO_start_file
:
24380 unsigned int bytes_read
;
24383 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24384 mac_ptr
+= bytes_read
;
24385 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24386 mac_ptr
+= bytes_read
;
24388 if ((line
== 0 && !at_commandline
)
24389 || (line
!= 0 && at_commandline
))
24390 complaint (&symfile_complaints
,
24391 _("debug info gives source %d included "
24392 "from %s at %s line %d"),
24393 file
, at_commandline
? _("command-line") : _("file"),
24394 line
== 0 ? _("zero") : _("non-zero"), line
);
24396 if (at_commandline
)
24398 /* This DW_MACRO_start_file was executed in the
24400 at_commandline
= 0;
24403 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24407 case DW_MACRO_end_file
:
24408 if (! current_file
)
24409 complaint (&symfile_complaints
,
24410 _("macro debug info has an unmatched "
24411 "`close_file' directive"));
24414 current_file
= current_file
->included_by
;
24415 if (! current_file
)
24417 enum dwarf_macro_record_type next_type
;
24419 /* GCC circa March 2002 doesn't produce the zero
24420 type byte marking the end of the compilation
24421 unit. Complain if it's not there, but exit no
24424 /* Do we at least have room for a macinfo type byte? */
24425 if (mac_ptr
>= mac_end
)
24427 dwarf2_section_buffer_overflow_complaint (section
);
24431 /* We don't increment mac_ptr here, so this is just
24434 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24436 if (next_type
!= 0)
24437 complaint (&symfile_complaints
,
24438 _("no terminating 0-type entry for "
24439 "macros in `.debug_macinfo' section"));
24446 case DW_MACRO_import
:
24447 case DW_MACRO_import_sup
:
24451 bfd
*include_bfd
= abfd
;
24452 struct dwarf2_section_info
*include_section
= section
;
24453 const gdb_byte
*include_mac_end
= mac_end
;
24454 int is_dwz
= section_is_dwz
;
24455 const gdb_byte
*new_mac_ptr
;
24457 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24458 mac_ptr
+= offset_size
;
24460 if (macinfo_type
== DW_MACRO_import_sup
)
24462 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24464 dwarf2_read_section (objfile
, &dwz
->macro
);
24466 include_section
= &dwz
->macro
;
24467 include_bfd
= get_section_bfd_owner (include_section
);
24468 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24472 new_mac_ptr
= include_section
->buffer
+ offset
;
24473 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24477 /* This has actually happened; see
24478 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24479 complaint (&symfile_complaints
,
24480 _("recursive DW_MACRO_import in "
24481 ".debug_macro section"));
24485 *slot
= (void *) new_mac_ptr
;
24487 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24488 include_bfd
, new_mac_ptr
,
24489 include_mac_end
, current_file
, lh
,
24490 section
, section_is_gnu
, is_dwz
,
24491 offset_size
, include_hash
);
24493 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24498 case DW_MACINFO_vendor_ext
:
24499 if (!section_is_gnu
)
24501 unsigned int bytes_read
;
24503 /* This reads the constant, but since we don't recognize
24504 any vendor extensions, we ignore it. */
24505 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24506 mac_ptr
+= bytes_read
;
24507 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24508 mac_ptr
+= bytes_read
;
24510 /* We don't recognize any vendor extensions. */
24516 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24517 mac_ptr
, mac_end
, abfd
, offset_size
,
24519 if (mac_ptr
== NULL
)
24524 } while (macinfo_type
!= 0);
24528 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24529 int section_is_gnu
)
24531 struct dwarf2_per_objfile
*dwarf2_per_objfile
24532 = cu
->per_cu
->dwarf2_per_objfile
;
24533 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24534 struct line_header
*lh
= cu
->line_header
;
24536 const gdb_byte
*mac_ptr
, *mac_end
;
24537 struct macro_source_file
*current_file
= 0;
24538 enum dwarf_macro_record_type macinfo_type
;
24539 unsigned int offset_size
= cu
->header
.offset_size
;
24540 const gdb_byte
*opcode_definitions
[256];
24542 struct dwarf2_section_info
*section
;
24543 const char *section_name
;
24545 if (cu
->dwo_unit
!= NULL
)
24547 if (section_is_gnu
)
24549 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24550 section_name
= ".debug_macro.dwo";
24554 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24555 section_name
= ".debug_macinfo.dwo";
24560 if (section_is_gnu
)
24562 section
= &dwarf2_per_objfile
->macro
;
24563 section_name
= ".debug_macro";
24567 section
= &dwarf2_per_objfile
->macinfo
;
24568 section_name
= ".debug_macinfo";
24572 dwarf2_read_section (objfile
, section
);
24573 if (section
->buffer
== NULL
)
24575 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24578 abfd
= get_section_bfd_owner (section
);
24580 /* First pass: Find the name of the base filename.
24581 This filename is needed in order to process all macros whose definition
24582 (or undefinition) comes from the command line. These macros are defined
24583 before the first DW_MACINFO_start_file entry, and yet still need to be
24584 associated to the base file.
24586 To determine the base file name, we scan the macro definitions until we
24587 reach the first DW_MACINFO_start_file entry. We then initialize
24588 CURRENT_FILE accordingly so that any macro definition found before the
24589 first DW_MACINFO_start_file can still be associated to the base file. */
24591 mac_ptr
= section
->buffer
+ offset
;
24592 mac_end
= section
->buffer
+ section
->size
;
24594 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24595 &offset_size
, section_is_gnu
);
24596 if (mac_ptr
== NULL
)
24598 /* We already issued a complaint. */
24604 /* Do we at least have room for a macinfo type byte? */
24605 if (mac_ptr
>= mac_end
)
24607 /* Complaint is printed during the second pass as GDB will probably
24608 stop the first pass earlier upon finding
24609 DW_MACINFO_start_file. */
24613 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24616 /* Note that we rely on the fact that the corresponding GNU and
24617 DWARF constants are the same. */
24619 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24620 switch (macinfo_type
)
24622 /* A zero macinfo type indicates the end of the macro
24627 case DW_MACRO_define
:
24628 case DW_MACRO_undef
:
24629 /* Only skip the data by MAC_PTR. */
24631 unsigned int bytes_read
;
24633 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24634 mac_ptr
+= bytes_read
;
24635 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24636 mac_ptr
+= bytes_read
;
24640 case DW_MACRO_start_file
:
24642 unsigned int bytes_read
;
24645 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24646 mac_ptr
+= bytes_read
;
24647 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24648 mac_ptr
+= bytes_read
;
24650 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24654 case DW_MACRO_end_file
:
24655 /* No data to skip by MAC_PTR. */
24658 case DW_MACRO_define_strp
:
24659 case DW_MACRO_undef_strp
:
24660 case DW_MACRO_define_sup
:
24661 case DW_MACRO_undef_sup
:
24663 unsigned int bytes_read
;
24665 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24666 mac_ptr
+= bytes_read
;
24667 mac_ptr
+= offset_size
;
24671 case DW_MACRO_import
:
24672 case DW_MACRO_import_sup
:
24673 /* Note that, according to the spec, a transparent include
24674 chain cannot call DW_MACRO_start_file. So, we can just
24675 skip this opcode. */
24676 mac_ptr
+= offset_size
;
24679 case DW_MACINFO_vendor_ext
:
24680 /* Only skip the data by MAC_PTR. */
24681 if (!section_is_gnu
)
24683 unsigned int bytes_read
;
24685 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24686 mac_ptr
+= bytes_read
;
24687 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24688 mac_ptr
+= bytes_read
;
24693 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24694 mac_ptr
, mac_end
, abfd
, offset_size
,
24696 if (mac_ptr
== NULL
)
24701 } while (macinfo_type
!= 0 && current_file
== NULL
);
24703 /* Second pass: Process all entries.
24705 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24706 command-line macro definitions/undefinitions. This flag is unset when we
24707 reach the first DW_MACINFO_start_file entry. */
24709 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24711 NULL
, xcalloc
, xfree
));
24712 mac_ptr
= section
->buffer
+ offset
;
24713 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24714 *slot
= (void *) mac_ptr
;
24715 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24716 abfd
, mac_ptr
, mac_end
,
24717 current_file
, lh
, section
,
24718 section_is_gnu
, 0, offset_size
,
24719 include_hash
.get ());
24722 /* Check if the attribute's form is a DW_FORM_block*
24723 if so return true else false. */
24726 attr_form_is_block (const struct attribute
*attr
)
24728 return (attr
== NULL
? 0 :
24729 attr
->form
== DW_FORM_block1
24730 || attr
->form
== DW_FORM_block2
24731 || attr
->form
== DW_FORM_block4
24732 || attr
->form
== DW_FORM_block
24733 || attr
->form
== DW_FORM_exprloc
);
24736 /* Return non-zero if ATTR's value is a section offset --- classes
24737 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24738 You may use DW_UNSND (attr) to retrieve such offsets.
24740 Section 7.5.4, "Attribute Encodings", explains that no attribute
24741 may have a value that belongs to more than one of these classes; it
24742 would be ambiguous if we did, because we use the same forms for all
24746 attr_form_is_section_offset (const struct attribute
*attr
)
24748 return (attr
->form
== DW_FORM_data4
24749 || attr
->form
== DW_FORM_data8
24750 || attr
->form
== DW_FORM_sec_offset
);
24753 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24754 zero otherwise. When this function returns true, you can apply
24755 dwarf2_get_attr_constant_value to it.
24757 However, note that for some attributes you must check
24758 attr_form_is_section_offset before using this test. DW_FORM_data4
24759 and DW_FORM_data8 are members of both the constant class, and of
24760 the classes that contain offsets into other debug sections
24761 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24762 that, if an attribute's can be either a constant or one of the
24763 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24764 taken as section offsets, not constants.
24766 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24767 cannot handle that. */
24770 attr_form_is_constant (const struct attribute
*attr
)
24772 switch (attr
->form
)
24774 case DW_FORM_sdata
:
24775 case DW_FORM_udata
:
24776 case DW_FORM_data1
:
24777 case DW_FORM_data2
:
24778 case DW_FORM_data4
:
24779 case DW_FORM_data8
:
24780 case DW_FORM_implicit_const
:
24788 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24789 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24792 attr_form_is_ref (const struct attribute
*attr
)
24794 switch (attr
->form
)
24796 case DW_FORM_ref_addr
:
24801 case DW_FORM_ref_udata
:
24802 case DW_FORM_GNU_ref_alt
:
24809 /* Return the .debug_loc section to use for CU.
24810 For DWO files use .debug_loc.dwo. */
24812 static struct dwarf2_section_info
*
24813 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24815 struct dwarf2_per_objfile
*dwarf2_per_objfile
24816 = cu
->per_cu
->dwarf2_per_objfile
;
24820 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24822 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24824 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24825 : &dwarf2_per_objfile
->loc
);
24828 /* A helper function that fills in a dwarf2_loclist_baton. */
24831 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24832 struct dwarf2_loclist_baton
*baton
,
24833 const struct attribute
*attr
)
24835 struct dwarf2_per_objfile
*dwarf2_per_objfile
24836 = cu
->per_cu
->dwarf2_per_objfile
;
24837 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24839 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24841 baton
->per_cu
= cu
->per_cu
;
24842 gdb_assert (baton
->per_cu
);
24843 /* We don't know how long the location list is, but make sure we
24844 don't run off the edge of the section. */
24845 baton
->size
= section
->size
- DW_UNSND (attr
);
24846 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24847 baton
->base_address
= cu
->base_address
;
24848 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24852 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24853 struct dwarf2_cu
*cu
, int is_block
)
24855 struct dwarf2_per_objfile
*dwarf2_per_objfile
24856 = cu
->per_cu
->dwarf2_per_objfile
;
24857 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24858 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24860 if (attr_form_is_section_offset (attr
)
24861 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24862 the section. If so, fall through to the complaint in the
24864 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24866 struct dwarf2_loclist_baton
*baton
;
24868 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24870 fill_in_loclist_baton (cu
, baton
, attr
);
24872 if (cu
->base_known
== 0)
24873 complaint (&symfile_complaints
,
24874 _("Location list used without "
24875 "specifying the CU base address."));
24877 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24878 ? dwarf2_loclist_block_index
24879 : dwarf2_loclist_index
);
24880 SYMBOL_LOCATION_BATON (sym
) = baton
;
24884 struct dwarf2_locexpr_baton
*baton
;
24886 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24887 baton
->per_cu
= cu
->per_cu
;
24888 gdb_assert (baton
->per_cu
);
24890 if (attr_form_is_block (attr
))
24892 /* Note that we're just copying the block's data pointer
24893 here, not the actual data. We're still pointing into the
24894 info_buffer for SYM's objfile; right now we never release
24895 that buffer, but when we do clean up properly this may
24897 baton
->size
= DW_BLOCK (attr
)->size
;
24898 baton
->data
= DW_BLOCK (attr
)->data
;
24902 dwarf2_invalid_attrib_class_complaint ("location description",
24903 SYMBOL_NATURAL_NAME (sym
));
24907 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24908 ? dwarf2_locexpr_block_index
24909 : dwarf2_locexpr_index
);
24910 SYMBOL_LOCATION_BATON (sym
) = baton
;
24914 /* Return the OBJFILE associated with the compilation unit CU. If CU
24915 came from a separate debuginfo file, then the master objfile is
24919 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24921 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24923 /* Return the master objfile, so that we can report and look up the
24924 correct file containing this variable. */
24925 if (objfile
->separate_debug_objfile_backlink
)
24926 objfile
= objfile
->separate_debug_objfile_backlink
;
24931 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24932 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24933 CU_HEADERP first. */
24935 static const struct comp_unit_head
*
24936 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24937 struct dwarf2_per_cu_data
*per_cu
)
24939 const gdb_byte
*info_ptr
;
24942 return &per_cu
->cu
->header
;
24944 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24946 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24947 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24948 rcuh_kind::COMPILE
);
24953 /* Return the address size given in the compilation unit header for CU. */
24956 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24958 struct comp_unit_head cu_header_local
;
24959 const struct comp_unit_head
*cu_headerp
;
24961 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24963 return cu_headerp
->addr_size
;
24966 /* Return the offset size given in the compilation unit header for CU. */
24969 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24971 struct comp_unit_head cu_header_local
;
24972 const struct comp_unit_head
*cu_headerp
;
24974 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24976 return cu_headerp
->offset_size
;
24979 /* See its dwarf2loc.h declaration. */
24982 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24984 struct comp_unit_head cu_header_local
;
24985 const struct comp_unit_head
*cu_headerp
;
24987 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24989 if (cu_headerp
->version
== 2)
24990 return cu_headerp
->addr_size
;
24992 return cu_headerp
->offset_size
;
24995 /* Return the text offset of the CU. The returned offset comes from
24996 this CU's objfile. If this objfile came from a separate debuginfo
24997 file, then the offset may be different from the corresponding
24998 offset in the parent objfile. */
25001 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25003 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25005 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25008 /* Return DWARF version number of PER_CU. */
25011 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25013 return per_cu
->dwarf_version
;
25016 /* Locate the .debug_info compilation unit from CU's objfile which contains
25017 the DIE at OFFSET. Raises an error on failure. */
25019 static struct dwarf2_per_cu_data
*
25020 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25021 unsigned int offset_in_dwz
,
25022 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25024 struct dwarf2_per_cu_data
*this_cu
;
25026 const sect_offset
*cu_off
;
25029 high
= dwarf2_per_objfile
->n_comp_units
- 1;
25032 struct dwarf2_per_cu_data
*mid_cu
;
25033 int mid
= low
+ (high
- low
) / 2;
25035 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25036 cu_off
= &mid_cu
->sect_off
;
25037 if (mid_cu
->is_dwz
> offset_in_dwz
25038 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
25043 gdb_assert (low
== high
);
25044 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25045 cu_off
= &this_cu
->sect_off
;
25046 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
25048 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25049 error (_("Dwarf Error: could not find partial DIE containing "
25050 "offset 0x%x [in module %s]"),
25051 to_underlying (sect_off
),
25052 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25054 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25056 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25060 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25061 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
25062 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25063 error (_("invalid dwarf2 offset %u"), to_underlying (sect_off
));
25064 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25069 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25071 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25072 : per_cu (per_cu_
),
25075 checked_producer (0),
25076 producer_is_gxx_lt_4_6 (0),
25077 producer_is_gcc_lt_4_3 (0),
25078 producer_is_icc_lt_14 (0),
25079 processing_has_namespace_info (0)
25084 /* Destroy a dwarf2_cu. */
25086 dwarf2_cu::~dwarf2_cu ()
25091 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25094 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25095 enum language pretend_language
)
25097 struct attribute
*attr
;
25099 /* Set the language we're debugging. */
25100 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25102 set_cu_language (DW_UNSND (attr
), cu
);
25105 cu
->language
= pretend_language
;
25106 cu
->language_defn
= language_def (cu
->language
);
25109 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25112 /* Free all cached compilation units. */
25115 free_cached_comp_units (void *data
)
25117 struct dwarf2_per_objfile
*dwarf2_per_objfile
25118 = (struct dwarf2_per_objfile
*) data
;
25120 dwarf2_per_objfile
->free_cached_comp_units ();
25123 /* Increase the age counter on each cached compilation unit, and free
25124 any that are too old. */
25127 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25129 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25131 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25132 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25133 while (per_cu
!= NULL
)
25135 per_cu
->cu
->last_used
++;
25136 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25137 dwarf2_mark (per_cu
->cu
);
25138 per_cu
= per_cu
->cu
->read_in_chain
;
25141 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25142 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25143 while (per_cu
!= NULL
)
25145 struct dwarf2_per_cu_data
*next_cu
;
25147 next_cu
= per_cu
->cu
->read_in_chain
;
25149 if (!per_cu
->cu
->mark
)
25152 *last_chain
= next_cu
;
25155 last_chain
= &per_cu
->cu
->read_in_chain
;
25161 /* Remove a single compilation unit from the cache. */
25164 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25166 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25167 struct dwarf2_per_objfile
*dwarf2_per_objfile
25168 = target_per_cu
->dwarf2_per_objfile
;
25170 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25171 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25172 while (per_cu
!= NULL
)
25174 struct dwarf2_per_cu_data
*next_cu
;
25176 next_cu
= per_cu
->cu
->read_in_chain
;
25178 if (per_cu
== target_per_cu
)
25182 *last_chain
= next_cu
;
25186 last_chain
= &per_cu
->cu
->read_in_chain
;
25192 /* Release all extra memory associated with OBJFILE. */
25195 dwarf2_free_objfile (struct objfile
*objfile
)
25197 struct dwarf2_per_objfile
*dwarf2_per_objfile
25198 = get_dwarf2_per_objfile (objfile
);
25200 if (dwarf2_per_objfile
== NULL
)
25203 dwarf2_per_objfile
->~dwarf2_per_objfile ();
25206 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25207 We store these in a hash table separate from the DIEs, and preserve them
25208 when the DIEs are flushed out of cache.
25210 The CU "per_cu" pointer is needed because offset alone is not enough to
25211 uniquely identify the type. A file may have multiple .debug_types sections,
25212 or the type may come from a DWO file. Furthermore, while it's more logical
25213 to use per_cu->section+offset, with Fission the section with the data is in
25214 the DWO file but we don't know that section at the point we need it.
25215 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25216 because we can enter the lookup routine, get_die_type_at_offset, from
25217 outside this file, and thus won't necessarily have PER_CU->cu.
25218 Fortunately, PER_CU is stable for the life of the objfile. */
25220 struct dwarf2_per_cu_offset_and_type
25222 const struct dwarf2_per_cu_data
*per_cu
;
25223 sect_offset sect_off
;
25227 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25230 per_cu_offset_and_type_hash (const void *item
)
25232 const struct dwarf2_per_cu_offset_and_type
*ofs
25233 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25235 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25238 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25241 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25243 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25244 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25245 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25246 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25248 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25249 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25252 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25253 table if necessary. For convenience, return TYPE.
25255 The DIEs reading must have careful ordering to:
25256 * Not cause infite loops trying to read in DIEs as a prerequisite for
25257 reading current DIE.
25258 * Not trying to dereference contents of still incompletely read in types
25259 while reading in other DIEs.
25260 * Enable referencing still incompletely read in types just by a pointer to
25261 the type without accessing its fields.
25263 Therefore caller should follow these rules:
25264 * Try to fetch any prerequisite types we may need to build this DIE type
25265 before building the type and calling set_die_type.
25266 * After building type call set_die_type for current DIE as soon as
25267 possible before fetching more types to complete the current type.
25268 * Make the type as complete as possible before fetching more types. */
25270 static struct type
*
25271 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25273 struct dwarf2_per_objfile
*dwarf2_per_objfile
25274 = cu
->per_cu
->dwarf2_per_objfile
;
25275 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25276 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25277 struct attribute
*attr
;
25278 struct dynamic_prop prop
;
25280 /* For Ada types, make sure that the gnat-specific data is always
25281 initialized (if not already set). There are a few types where
25282 we should not be doing so, because the type-specific area is
25283 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25284 where the type-specific area is used to store the floatformat).
25285 But this is not a problem, because the gnat-specific information
25286 is actually not needed for these types. */
25287 if (need_gnat_info (cu
)
25288 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25289 && TYPE_CODE (type
) != TYPE_CODE_FLT
25290 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25291 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25292 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25293 && !HAVE_GNAT_AUX_INFO (type
))
25294 INIT_GNAT_SPECIFIC (type
);
25296 /* Read DW_AT_allocated and set in type. */
25297 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25298 if (attr_form_is_block (attr
))
25300 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25301 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25303 else if (attr
!= NULL
)
25305 complaint (&symfile_complaints
,
25306 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
25307 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25308 to_underlying (die
->sect_off
));
25311 /* Read DW_AT_associated and set in type. */
25312 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25313 if (attr_form_is_block (attr
))
25315 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25316 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25318 else if (attr
!= NULL
)
25320 complaint (&symfile_complaints
,
25321 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
25322 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25323 to_underlying (die
->sect_off
));
25326 /* Read DW_AT_data_location and set in type. */
25327 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25328 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25329 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25331 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25333 dwarf2_per_objfile
->die_type_hash
=
25334 htab_create_alloc_ex (127,
25335 per_cu_offset_and_type_hash
,
25336 per_cu_offset_and_type_eq
,
25338 &objfile
->objfile_obstack
,
25339 hashtab_obstack_allocate
,
25340 dummy_obstack_deallocate
);
25343 ofs
.per_cu
= cu
->per_cu
;
25344 ofs
.sect_off
= die
->sect_off
;
25346 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25347 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25349 complaint (&symfile_complaints
,
25350 _("A problem internal to GDB: DIE 0x%x has type already set"),
25351 to_underlying (die
->sect_off
));
25352 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25353 struct dwarf2_per_cu_offset_and_type
);
25358 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25359 or return NULL if the die does not have a saved type. */
25361 static struct type
*
25362 get_die_type_at_offset (sect_offset sect_off
,
25363 struct dwarf2_per_cu_data
*per_cu
)
25365 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25366 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25368 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25371 ofs
.per_cu
= per_cu
;
25372 ofs
.sect_off
= sect_off
;
25373 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25374 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25381 /* Look up the type for DIE in CU in die_type_hash,
25382 or return NULL if DIE does not have a saved type. */
25384 static struct type
*
25385 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25387 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25390 /* Add a dependence relationship from CU to REF_PER_CU. */
25393 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25394 struct dwarf2_per_cu_data
*ref_per_cu
)
25398 if (cu
->dependencies
== NULL
)
25400 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25401 NULL
, &cu
->comp_unit_obstack
,
25402 hashtab_obstack_allocate
,
25403 dummy_obstack_deallocate
);
25405 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25407 *slot
= ref_per_cu
;
25410 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25411 Set the mark field in every compilation unit in the
25412 cache that we must keep because we are keeping CU. */
25415 dwarf2_mark_helper (void **slot
, void *data
)
25417 struct dwarf2_per_cu_data
*per_cu
;
25419 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25421 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25422 reading of the chain. As such dependencies remain valid it is not much
25423 useful to track and undo them during QUIT cleanups. */
25424 if (per_cu
->cu
== NULL
)
25427 if (per_cu
->cu
->mark
)
25429 per_cu
->cu
->mark
= 1;
25431 if (per_cu
->cu
->dependencies
!= NULL
)
25432 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25437 /* Set the mark field in CU and in every other compilation unit in the
25438 cache that we must keep because we are keeping CU. */
25441 dwarf2_mark (struct dwarf2_cu
*cu
)
25446 if (cu
->dependencies
!= NULL
)
25447 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25451 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25455 per_cu
->cu
->mark
= 0;
25456 per_cu
= per_cu
->cu
->read_in_chain
;
25460 /* Trivial hash function for partial_die_info: the hash value of a DIE
25461 is its offset in .debug_info for this objfile. */
25464 partial_die_hash (const void *item
)
25466 const struct partial_die_info
*part_die
25467 = (const struct partial_die_info
*) item
;
25469 return to_underlying (part_die
->sect_off
);
25472 /* Trivial comparison function for partial_die_info structures: two DIEs
25473 are equal if they have the same offset. */
25476 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25478 const struct partial_die_info
*part_die_lhs
25479 = (const struct partial_die_info
*) item_lhs
;
25480 const struct partial_die_info
*part_die_rhs
25481 = (const struct partial_die_info
*) item_rhs
;
25483 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25486 static struct cmd_list_element
*set_dwarf_cmdlist
;
25487 static struct cmd_list_element
*show_dwarf_cmdlist
;
25490 set_dwarf_cmd (const char *args
, int from_tty
)
25492 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25497 show_dwarf_cmd (const char *args
, int from_tty
)
25499 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25502 /* The "save gdb-index" command. */
25504 /* Write SIZE bytes from the buffer pointed to by DATA to FILE, with
25508 file_write (FILE *file
, const void *data
, size_t size
)
25510 if (fwrite (data
, 1, size
, file
) != size
)
25511 error (_("couldn't data write to file"));
25514 /* Write the contents of VEC to FILE, with error checking. */
25516 template<typename Elem
, typename Alloc
>
25518 file_write (FILE *file
, const std::vector
<Elem
, Alloc
> &vec
)
25520 file_write (file
, vec
.data (), vec
.size () * sizeof (vec
[0]));
25523 /* In-memory buffer to prepare data to be written later to a file. */
25527 /* Copy DATA to the end of the buffer. */
25528 template<typename T
>
25529 void append_data (const T
&data
)
25531 std::copy (reinterpret_cast<const gdb_byte
*> (&data
),
25532 reinterpret_cast<const gdb_byte
*> (&data
+ 1),
25533 grow (sizeof (data
)));
25536 /* Copy CSTR (a zero-terminated string) to the end of buffer. The
25537 terminating zero is appended too. */
25538 void append_cstr0 (const char *cstr
)
25540 const size_t size
= strlen (cstr
) + 1;
25541 std::copy (cstr
, cstr
+ size
, grow (size
));
25544 /* Store INPUT as ULEB128 to the end of buffer. */
25545 void append_unsigned_leb128 (ULONGEST input
)
25549 gdb_byte output
= input
& 0x7f;
25553 append_data (output
);
25559 /* Accept a host-format integer in VAL and append it to the buffer
25560 as a target-format integer which is LEN bytes long. */
25561 void append_uint (size_t len
, bfd_endian byte_order
, ULONGEST val
)
25563 ::store_unsigned_integer (grow (len
), len
, byte_order
, val
);
25566 /* Return the size of the buffer. */
25567 size_t size () const
25569 return m_vec
.size ();
25572 /* Return true iff the buffer is empty. */
25573 bool empty () const
25575 return m_vec
.empty ();
25578 /* Write the buffer to FILE. */
25579 void file_write (FILE *file
) const
25581 ::file_write (file
, m_vec
);
25585 /* Grow SIZE bytes at the end of the buffer. Returns a pointer to
25586 the start of the new block. */
25587 gdb_byte
*grow (size_t size
)
25589 m_vec
.resize (m_vec
.size () + size
);
25590 return &*m_vec
.end () - size
;
25593 gdb::byte_vector m_vec
;
25596 /* An entry in the symbol table. */
25597 struct symtab_index_entry
25599 /* The name of the symbol. */
25601 /* The offset of the name in the constant pool. */
25602 offset_type index_offset
;
25603 /* A sorted vector of the indices of all the CUs that hold an object
25605 std::vector
<offset_type
> cu_indices
;
25608 /* The symbol table. This is a power-of-2-sized hash table. */
25609 struct mapped_symtab
25613 data
.resize (1024);
25616 offset_type n_elements
= 0;
25617 std::vector
<symtab_index_entry
> data
;
25620 /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to
25623 Function is used only during write_hash_table so no index format backward
25624 compatibility is needed. */
25626 static symtab_index_entry
&
25627 find_slot (struct mapped_symtab
*symtab
, const char *name
)
25629 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
25631 index
= hash
& (symtab
->data
.size () - 1);
25632 step
= ((hash
* 17) & (symtab
->data
.size () - 1)) | 1;
25636 if (symtab
->data
[index
].name
== NULL
25637 || strcmp (name
, symtab
->data
[index
].name
) == 0)
25638 return symtab
->data
[index
];
25639 index
= (index
+ step
) & (symtab
->data
.size () - 1);
25643 /* Expand SYMTAB's hash table. */
25646 hash_expand (struct mapped_symtab
*symtab
)
25648 auto old_entries
= std::move (symtab
->data
);
25650 symtab
->data
.clear ();
25651 symtab
->data
.resize (old_entries
.size () * 2);
25653 for (auto &it
: old_entries
)
25654 if (it
.name
!= NULL
)
25656 auto &ref
= find_slot (symtab
, it
.name
);
25657 ref
= std::move (it
);
25661 /* Add an entry to SYMTAB. NAME is the name of the symbol.
25662 CU_INDEX is the index of the CU in which the symbol appears.
25663 IS_STATIC is one if the symbol is static, otherwise zero (global). */
25666 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
25667 int is_static
, gdb_index_symbol_kind kind
,
25668 offset_type cu_index
)
25670 offset_type cu_index_and_attrs
;
25672 ++symtab
->n_elements
;
25673 if (4 * symtab
->n_elements
/ 3 >= symtab
->data
.size ())
25674 hash_expand (symtab
);
25676 symtab_index_entry
&slot
= find_slot (symtab
, name
);
25677 if (slot
.name
== NULL
)
25680 /* index_offset is set later. */
25683 cu_index_and_attrs
= 0;
25684 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
25685 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
25686 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
25688 /* We don't want to record an index value twice as we want to avoid the
25690 We process all global symbols and then all static symbols
25691 (which would allow us to avoid the duplication by only having to check
25692 the last entry pushed), but a symbol could have multiple kinds in one CU.
25693 To keep things simple we don't worry about the duplication here and
25694 sort and uniqufy the list after we've processed all symbols. */
25695 slot
.cu_indices
.push_back (cu_index_and_attrs
);
25698 /* Sort and remove duplicates of all symbols' cu_indices lists. */
25701 uniquify_cu_indices (struct mapped_symtab
*symtab
)
25703 for (auto &entry
: symtab
->data
)
25705 if (entry
.name
!= NULL
&& !entry
.cu_indices
.empty ())
25707 auto &cu_indices
= entry
.cu_indices
;
25708 std::sort (cu_indices
.begin (), cu_indices
.end ());
25709 auto from
= std::unique (cu_indices
.begin (), cu_indices
.end ());
25710 cu_indices
.erase (from
, cu_indices
.end ());
25715 /* A form of 'const char *' suitable for container keys. Only the
25716 pointer is stored. The strings themselves are compared, not the
25721 c_str_view (const char *cstr
)
25725 bool operator== (const c_str_view
&other
) const
25727 return strcmp (m_cstr
, other
.m_cstr
) == 0;
25730 /* Return the underlying C string. Note, the returned string is
25731 only a reference with lifetime of this object. */
25732 const char *c_str () const
25738 friend class c_str_view_hasher
;
25739 const char *const m_cstr
;
25742 /* A std::unordered_map::hasher for c_str_view that uses the right
25743 hash function for strings in a mapped index. */
25744 class c_str_view_hasher
25747 size_t operator () (const c_str_view
&x
) const
25749 return mapped_index_string_hash (INT_MAX
, x
.m_cstr
);
25753 /* A std::unordered_map::hasher for std::vector<>. */
25754 template<typename T
>
25755 class vector_hasher
25758 size_t operator () (const std::vector
<T
> &key
) const
25760 return iterative_hash (key
.data (),
25761 sizeof (key
.front ()) * key
.size (), 0);
25765 /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with
25766 constant pool entries going into the data buffer CPOOL. */
25769 write_hash_table (mapped_symtab
*symtab
, data_buf
&output
, data_buf
&cpool
)
25772 /* Elements are sorted vectors of the indices of all the CUs that
25773 hold an object of this name. */
25774 std::unordered_map
<std::vector
<offset_type
>, offset_type
,
25775 vector_hasher
<offset_type
>>
25778 /* We add all the index vectors to the constant pool first, to
25779 ensure alignment is ok. */
25780 for (symtab_index_entry
&entry
: symtab
->data
)
25782 if (entry
.name
== NULL
)
25784 gdb_assert (entry
.index_offset
== 0);
25786 /* Finding before inserting is faster than always trying to
25787 insert, because inserting always allocates a node, does the
25788 lookup, and then destroys the new node if another node
25789 already had the same key. C++17 try_emplace will avoid
25792 = symbol_hash_table
.find (entry
.cu_indices
);
25793 if (found
!= symbol_hash_table
.end ())
25795 entry
.index_offset
= found
->second
;
25799 symbol_hash_table
.emplace (entry
.cu_indices
, cpool
.size ());
25800 entry
.index_offset
= cpool
.size ();
25801 cpool
.append_data (MAYBE_SWAP (entry
.cu_indices
.size ()));
25802 for (const auto index
: entry
.cu_indices
)
25803 cpool
.append_data (MAYBE_SWAP (index
));
25807 /* Now write out the hash table. */
25808 std::unordered_map
<c_str_view
, offset_type
, c_str_view_hasher
> str_table
;
25809 for (const auto &entry
: symtab
->data
)
25811 offset_type str_off
, vec_off
;
25813 if (entry
.name
!= NULL
)
25815 const auto insertpair
= str_table
.emplace (entry
.name
, cpool
.size ());
25816 if (insertpair
.second
)
25817 cpool
.append_cstr0 (entry
.name
);
25818 str_off
= insertpair
.first
->second
;
25819 vec_off
= entry
.index_offset
;
25823 /* While 0 is a valid constant pool index, it is not valid
25824 to have 0 for both offsets. */
25829 output
.append_data (MAYBE_SWAP (str_off
));
25830 output
.append_data (MAYBE_SWAP (vec_off
));
25834 typedef std::unordered_map
<partial_symtab
*, unsigned int> psym_index_map
;
25836 /* Helper struct for building the address table. */
25837 struct addrmap_index_data
25839 addrmap_index_data (data_buf
&addr_vec_
, psym_index_map
&cu_index_htab_
)
25840 : addr_vec (addr_vec_
), cu_index_htab (cu_index_htab_
)
25843 struct objfile
*objfile
;
25844 data_buf
&addr_vec
;
25845 psym_index_map
&cu_index_htab
;
25847 /* Non-zero if the previous_* fields are valid.
25848 We can't write an entry until we see the next entry (since it is only then
25849 that we know the end of the entry). */
25850 int previous_valid
;
25851 /* Index of the CU in the table of all CUs in the index file. */
25852 unsigned int previous_cu_index
;
25853 /* Start address of the CU. */
25854 CORE_ADDR previous_cu_start
;
25857 /* Write an address entry to ADDR_VEC. */
25860 add_address_entry (struct objfile
*objfile
, data_buf
&addr_vec
,
25861 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
25863 CORE_ADDR baseaddr
;
25865 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25867 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
25868 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
25869 addr_vec
.append_data (MAYBE_SWAP (cu_index
));
25872 /* Worker function for traversing an addrmap to build the address table. */
25875 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
25877 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
25878 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
25880 if (data
->previous_valid
)
25881 add_address_entry (data
->objfile
, data
->addr_vec
,
25882 data
->previous_cu_start
, start_addr
,
25883 data
->previous_cu_index
);
25885 data
->previous_cu_start
= start_addr
;
25888 const auto it
= data
->cu_index_htab
.find (pst
);
25889 gdb_assert (it
!= data
->cu_index_htab
.cend ());
25890 data
->previous_cu_index
= it
->second
;
25891 data
->previous_valid
= 1;
25894 data
->previous_valid
= 0;
25899 /* Write OBJFILE's address map to ADDR_VEC.
25900 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
25901 in the index file. */
25904 write_address_map (struct objfile
*objfile
, data_buf
&addr_vec
,
25905 psym_index_map
&cu_index_htab
)
25907 struct addrmap_index_data
addrmap_index_data (addr_vec
, cu_index_htab
);
25909 /* When writing the address table, we have to cope with the fact that
25910 the addrmap iterator only provides the start of a region; we have to
25911 wait until the next invocation to get the start of the next region. */
25913 addrmap_index_data
.objfile
= objfile
;
25914 addrmap_index_data
.previous_valid
= 0;
25916 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
25917 &addrmap_index_data
);
25919 /* It's highly unlikely the last entry (end address = 0xff...ff)
25920 is valid, but we should still handle it.
25921 The end address is recorded as the start of the next region, but that
25922 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
25924 if (addrmap_index_data
.previous_valid
)
25925 add_address_entry (objfile
, addr_vec
,
25926 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
25927 addrmap_index_data
.previous_cu_index
);
25930 /* Return the symbol kind of PSYM. */
25932 static gdb_index_symbol_kind
25933 symbol_kind (struct partial_symbol
*psym
)
25935 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
25936 enum address_class aclass
= PSYMBOL_CLASS (psym
);
25944 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
25946 return GDB_INDEX_SYMBOL_KIND_TYPE
;
25948 case LOC_CONST_BYTES
:
25949 case LOC_OPTIMIZED_OUT
:
25951 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
25953 /* Note: It's currently impossible to recognize psyms as enum values
25954 short of reading the type info. For now punt. */
25955 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
25957 /* There are other LOC_FOO values that one might want to classify
25958 as variables, but dwarf2read.c doesn't currently use them. */
25959 return GDB_INDEX_SYMBOL_KIND_OTHER
;
25961 case STRUCT_DOMAIN
:
25962 return GDB_INDEX_SYMBOL_KIND_TYPE
;
25964 return GDB_INDEX_SYMBOL_KIND_OTHER
;
25968 /* Add a list of partial symbols to SYMTAB. */
25971 write_psymbols (struct mapped_symtab
*symtab
,
25972 std::unordered_set
<partial_symbol
*> &psyms_seen
,
25973 struct partial_symbol
**psymp
,
25975 offset_type cu_index
,
25978 for (; count
-- > 0; ++psymp
)
25980 struct partial_symbol
*psym
= *psymp
;
25982 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
25983 error (_("Ada is not currently supported by the index"));
25985 /* Only add a given psymbol once. */
25986 if (psyms_seen
.insert (psym
).second
)
25988 gdb_index_symbol_kind kind
= symbol_kind (psym
);
25990 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
25991 is_static
, kind
, cu_index
);
25996 /* A helper struct used when iterating over debug_types. */
25997 struct signatured_type_index_data
25999 signatured_type_index_data (data_buf
&types_list_
,
26000 std::unordered_set
<partial_symbol
*> &psyms_seen_
)
26001 : types_list (types_list_
), psyms_seen (psyms_seen_
)
26004 struct objfile
*objfile
;
26005 struct mapped_symtab
*symtab
;
26006 data_buf
&types_list
;
26007 std::unordered_set
<partial_symbol
*> &psyms_seen
;
26011 /* A helper function that writes a single signatured_type to an
26015 write_one_signatured_type (void **slot
, void *d
)
26017 struct signatured_type_index_data
*info
26018 = (struct signatured_type_index_data
*) d
;
26019 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
26020 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
26022 write_psymbols (info
->symtab
,
26024 &info
->objfile
->global_psymbols
[psymtab
->globals_offset
],
26025 psymtab
->n_global_syms
, info
->cu_index
,
26027 write_psymbols (info
->symtab
,
26029 &info
->objfile
->static_psymbols
[psymtab
->statics_offset
],
26030 psymtab
->n_static_syms
, info
->cu_index
,
26033 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
26034 to_underlying (entry
->per_cu
.sect_off
));
26035 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
26036 to_underlying (entry
->type_offset_in_tu
));
26037 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
, entry
->signature
);
26044 /* Recurse into all "included" dependencies and count their symbols as
26045 if they appeared in this psymtab. */
26048 recursively_count_psymbols (struct partial_symtab
*psymtab
,
26049 size_t &psyms_seen
)
26051 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
26052 if (psymtab
->dependencies
[i
]->user
!= NULL
)
26053 recursively_count_psymbols (psymtab
->dependencies
[i
],
26056 psyms_seen
+= psymtab
->n_global_syms
;
26057 psyms_seen
+= psymtab
->n_static_syms
;
26060 /* Recurse into all "included" dependencies and write their symbols as
26061 if they appeared in this psymtab. */
26064 recursively_write_psymbols (struct objfile
*objfile
,
26065 struct partial_symtab
*psymtab
,
26066 struct mapped_symtab
*symtab
,
26067 std::unordered_set
<partial_symbol
*> &psyms_seen
,
26068 offset_type cu_index
)
26072 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
26073 if (psymtab
->dependencies
[i
]->user
!= NULL
)
26074 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
26075 symtab
, psyms_seen
, cu_index
);
26077 write_psymbols (symtab
,
26079 &objfile
->global_psymbols
[psymtab
->globals_offset
],
26080 psymtab
->n_global_syms
, cu_index
,
26082 write_psymbols (symtab
,
26084 &objfile
->static_psymbols
[psymtab
->statics_offset
],
26085 psymtab
->n_static_syms
, cu_index
,
26089 /* DWARF-5 .debug_names builder. */
26093 debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bool is_dwarf64
,
26094 bfd_endian dwarf5_byte_order
)
26095 : m_dwarf5_byte_order (dwarf5_byte_order
),
26096 m_dwarf32 (dwarf5_byte_order
),
26097 m_dwarf64 (dwarf5_byte_order
),
26098 m_dwarf (is_dwarf64
26099 ? static_cast<dwarf
&> (m_dwarf64
)
26100 : static_cast<dwarf
&> (m_dwarf32
)),
26101 m_name_table_string_offs (m_dwarf
.name_table_string_offs
),
26102 m_name_table_entry_offs (m_dwarf
.name_table_entry_offs
),
26103 m_debugstrlookup (dwarf2_per_objfile
)
26106 int dwarf5_offset_size () const
26108 const bool dwarf5_is_dwarf64
= &m_dwarf
== &m_dwarf64
;
26109 return dwarf5_is_dwarf64
? 8 : 4;
26112 /* Is this symbol from DW_TAG_compile_unit or DW_TAG_type_unit? */
26113 enum class unit_kind
{ cu
, tu
};
26115 /* Insert one symbol. */
26116 void insert (const partial_symbol
*psym
, int cu_index
, bool is_static
,
26119 const int dwarf_tag
= psymbol_tag (psym
);
26120 if (dwarf_tag
== 0)
26122 const char *const name
= SYMBOL_SEARCH_NAME (psym
);
26123 const auto insertpair
26124 = m_name_to_value_set
.emplace (c_str_view (name
),
26125 std::set
<symbol_value
> ());
26126 std::set
<symbol_value
> &value_set
= insertpair
.first
->second
;
26127 value_set
.emplace (symbol_value (dwarf_tag
, cu_index
, is_static
, kind
));
26130 /* Build all the tables. All symbols must be already inserted.
26131 This function does not call file_write, caller has to do it
26135 /* Verify the build method has not be called twice. */
26136 gdb_assert (m_abbrev_table
.empty ());
26137 const size_t name_count
= m_name_to_value_set
.size ();
26138 m_bucket_table
.resize
26139 (std::pow (2, std::ceil (std::log2 (name_count
* 4 / 3))));
26140 m_hash_table
.reserve (name_count
);
26141 m_name_table_string_offs
.reserve (name_count
);
26142 m_name_table_entry_offs
.reserve (name_count
);
26144 /* Map each hash of symbol to its name and value. */
26145 struct hash_it_pair
26148 decltype (m_name_to_value_set
)::const_iterator it
;
26150 std::vector
<std::forward_list
<hash_it_pair
>> bucket_hash
;
26151 bucket_hash
.resize (m_bucket_table
.size ());
26152 for (decltype (m_name_to_value_set
)::const_iterator it
26153 = m_name_to_value_set
.cbegin ();
26154 it
!= m_name_to_value_set
.cend ();
26157 const char *const name
= it
->first
.c_str ();
26158 const uint32_t hash
= dwarf5_djb_hash (name
);
26159 hash_it_pair hashitpair
;
26160 hashitpair
.hash
= hash
;
26161 hashitpair
.it
= it
;
26162 auto &slot
= bucket_hash
[hash
% bucket_hash
.size()];
26163 slot
.push_front (std::move (hashitpair
));
26165 for (size_t bucket_ix
= 0; bucket_ix
< bucket_hash
.size (); ++bucket_ix
)
26167 const std::forward_list
<hash_it_pair
> &hashitlist
26168 = bucket_hash
[bucket_ix
];
26169 if (hashitlist
.empty ())
26171 uint32_t &bucket_slot
= m_bucket_table
[bucket_ix
];
26172 /* The hashes array is indexed starting at 1. */
26173 store_unsigned_integer (reinterpret_cast<gdb_byte
*> (&bucket_slot
),
26174 sizeof (bucket_slot
), m_dwarf5_byte_order
,
26175 m_hash_table
.size () + 1);
26176 for (const hash_it_pair
&hashitpair
: hashitlist
)
26178 m_hash_table
.push_back (0);
26179 store_unsigned_integer (reinterpret_cast<gdb_byte
*>
26180 (&m_hash_table
.back ()),
26181 sizeof (m_hash_table
.back ()),
26182 m_dwarf5_byte_order
, hashitpair
.hash
);
26183 const c_str_view
&name
= hashitpair
.it
->first
;
26184 const std::set
<symbol_value
> &value_set
= hashitpair
.it
->second
;
26185 m_name_table_string_offs
.push_back_reorder
26186 (m_debugstrlookup
.lookup (name
.c_str ()));
26187 m_name_table_entry_offs
.push_back_reorder (m_entry_pool
.size ());
26188 gdb_assert (!value_set
.empty ());
26189 for (const symbol_value
&value
: value_set
)
26191 int &idx
= m_indexkey_to_idx
[index_key (value
.dwarf_tag
,
26196 idx
= m_idx_next
++;
26197 m_abbrev_table
.append_unsigned_leb128 (idx
);
26198 m_abbrev_table
.append_unsigned_leb128 (value
.dwarf_tag
);
26199 m_abbrev_table
.append_unsigned_leb128
26200 (value
.kind
== unit_kind::cu
? DW_IDX_compile_unit
26201 : DW_IDX_type_unit
);
26202 m_abbrev_table
.append_unsigned_leb128 (DW_FORM_udata
);
26203 m_abbrev_table
.append_unsigned_leb128 (value
.is_static
26204 ? DW_IDX_GNU_internal
26205 : DW_IDX_GNU_external
);
26206 m_abbrev_table
.append_unsigned_leb128 (DW_FORM_flag_present
);
26208 /* Terminate attributes list. */
26209 m_abbrev_table
.append_unsigned_leb128 (0);
26210 m_abbrev_table
.append_unsigned_leb128 (0);
26213 m_entry_pool
.append_unsigned_leb128 (idx
);
26214 m_entry_pool
.append_unsigned_leb128 (value
.cu_index
);
26217 /* Terminate the list of CUs. */
26218 m_entry_pool
.append_unsigned_leb128 (0);
26221 gdb_assert (m_hash_table
.size () == name_count
);
26223 /* Terminate tags list. */
26224 m_abbrev_table
.append_unsigned_leb128 (0);
26227 /* Return .debug_names bucket count. This must be called only after
26228 calling the build method. */
26229 uint32_t bucket_count () const
26231 /* Verify the build method has been already called. */
26232 gdb_assert (!m_abbrev_table
.empty ());
26233 const uint32_t retval
= m_bucket_table
.size ();
26235 /* Check for overflow. */
26236 gdb_assert (retval
== m_bucket_table
.size ());
26240 /* Return .debug_names names count. This must be called only after
26241 calling the build method. */
26242 uint32_t name_count () const
26244 /* Verify the build method has been already called. */
26245 gdb_assert (!m_abbrev_table
.empty ());
26246 const uint32_t retval
= m_hash_table
.size ();
26248 /* Check for overflow. */
26249 gdb_assert (retval
== m_hash_table
.size ());
26253 /* Return number of bytes of .debug_names abbreviation table. This
26254 must be called only after calling the build method. */
26255 uint32_t abbrev_table_bytes () const
26257 gdb_assert (!m_abbrev_table
.empty ());
26258 return m_abbrev_table
.size ();
26261 /* Recurse into all "included" dependencies and store their symbols
26262 as if they appeared in this psymtab. */
26263 void recursively_write_psymbols
26264 (struct objfile
*objfile
,
26265 struct partial_symtab
*psymtab
,
26266 std::unordered_set
<partial_symbol
*> &psyms_seen
,
26269 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
26270 if (psymtab
->dependencies
[i
]->user
!= NULL
)
26271 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
26272 psyms_seen
, cu_index
);
26274 write_psymbols (psyms_seen
,
26275 &objfile
->global_psymbols
[psymtab
->globals_offset
],
26276 psymtab
->n_global_syms
, cu_index
, false, unit_kind::cu
);
26277 write_psymbols (psyms_seen
,
26278 &objfile
->static_psymbols
[psymtab
->statics_offset
],
26279 psymtab
->n_static_syms
, cu_index
, true, unit_kind::cu
);
26282 /* Return number of bytes the .debug_names section will have. This
26283 must be called only after calling the build method. */
26284 size_t bytes () const
26286 /* Verify the build method has been already called. */
26287 gdb_assert (!m_abbrev_table
.empty ());
26288 size_t expected_bytes
= 0;
26289 expected_bytes
+= m_bucket_table
.size () * sizeof (m_bucket_table
[0]);
26290 expected_bytes
+= m_hash_table
.size () * sizeof (m_hash_table
[0]);
26291 expected_bytes
+= m_name_table_string_offs
.bytes ();
26292 expected_bytes
+= m_name_table_entry_offs
.bytes ();
26293 expected_bytes
+= m_abbrev_table
.size ();
26294 expected_bytes
+= m_entry_pool
.size ();
26295 return expected_bytes
;
26298 /* Write .debug_names to FILE_NAMES and .debug_str addition to
26299 FILE_STR. This must be called only after calling the build
26301 void file_write (FILE *file_names
, FILE *file_str
) const
26303 /* Verify the build method has been already called. */
26304 gdb_assert (!m_abbrev_table
.empty ());
26305 ::file_write (file_names
, m_bucket_table
);
26306 ::file_write (file_names
, m_hash_table
);
26307 m_name_table_string_offs
.file_write (file_names
);
26308 m_name_table_entry_offs
.file_write (file_names
);
26309 m_abbrev_table
.file_write (file_names
);
26310 m_entry_pool
.file_write (file_names
);
26311 m_debugstrlookup
.file_write (file_str
);
26314 /* A helper user data for write_one_signatured_type. */
26315 class write_one_signatured_type_data
26318 write_one_signatured_type_data (debug_names
&nametable_
,
26319 signatured_type_index_data
&&info_
)
26320 : nametable (nametable_
), info (std::move (info_
))
26322 debug_names
&nametable
;
26323 struct signatured_type_index_data info
;
26326 /* A helper function to pass write_one_signatured_type to
26327 htab_traverse_noresize. */
26329 write_one_signatured_type (void **slot
, void *d
)
26331 write_one_signatured_type_data
*data
= (write_one_signatured_type_data
*) d
;
26332 struct signatured_type_index_data
*info
= &data
->info
;
26333 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
26335 data
->nametable
.write_one_signatured_type (entry
, info
);
26342 /* Storage for symbol names mapping them to their .debug_str section
26344 class debug_str_lookup
26348 /* Object costructor to be called for current DWARF2_PER_OBJFILE.
26349 All .debug_str section strings are automatically stored. */
26350 debug_str_lookup (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
26351 : m_abfd (dwarf2_per_objfile
->objfile
->obfd
),
26352 m_dwarf2_per_objfile (dwarf2_per_objfile
)
26354 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
26355 &dwarf2_per_objfile
->str
);
26356 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
26358 for (const gdb_byte
*data
= dwarf2_per_objfile
->str
.buffer
;
26359 data
< (dwarf2_per_objfile
->str
.buffer
26360 + dwarf2_per_objfile
->str
.size
);)
26362 const char *const s
= reinterpret_cast<const char *> (data
);
26363 const auto insertpair
26364 = m_str_table
.emplace (c_str_view (s
),
26365 data
- dwarf2_per_objfile
->str
.buffer
);
26366 if (!insertpair
.second
)
26367 complaint (&symfile_complaints
,
26368 _("Duplicate string \"%s\" in "
26369 ".debug_str section [in module %s]"),
26370 s
, bfd_get_filename (m_abfd
));
26371 data
+= strlen (s
) + 1;
26375 /* Return offset of symbol name S in the .debug_str section. Add
26376 such symbol to the section's end if it does not exist there
26378 size_t lookup (const char *s
)
26380 const auto it
= m_str_table
.find (c_str_view (s
));
26381 if (it
!= m_str_table
.end ())
26383 const size_t offset
= (m_dwarf2_per_objfile
->str
.size
26384 + m_str_add_buf
.size ());
26385 m_str_table
.emplace (c_str_view (s
), offset
);
26386 m_str_add_buf
.append_cstr0 (s
);
26390 /* Append the end of the .debug_str section to FILE. */
26391 void file_write (FILE *file
) const
26393 m_str_add_buf
.file_write (file
);
26397 std::unordered_map
<c_str_view
, size_t, c_str_view_hasher
> m_str_table
;
26399 struct dwarf2_per_objfile
*m_dwarf2_per_objfile
;
26401 /* Data to add at the end of .debug_str for new needed symbol names. */
26402 data_buf m_str_add_buf
;
26405 /* Container to map used DWARF tags to their .debug_names abbreviation
26410 index_key (int dwarf_tag_
, bool is_static_
, unit_kind kind_
)
26411 : dwarf_tag (dwarf_tag_
), is_static (is_static_
), kind (kind_
)
26416 operator== (const index_key
&other
) const
26418 return (dwarf_tag
== other
.dwarf_tag
&& is_static
== other
.is_static
26419 && kind
== other
.kind
);
26422 const int dwarf_tag
;
26423 const bool is_static
;
26424 const unit_kind kind
;
26427 /* Provide std::unordered_map::hasher for index_key. */
26428 class index_key_hasher
26432 operator () (const index_key
&key
) const
26434 return (std::hash
<int>() (key
.dwarf_tag
) << 1) | key
.is_static
;
26438 /* Parameters of one symbol entry. */
26442 const int dwarf_tag
, cu_index
;
26443 const bool is_static
;
26444 const unit_kind kind
;
26446 symbol_value (int dwarf_tag_
, int cu_index_
, bool is_static_
,
26448 : dwarf_tag (dwarf_tag_
), cu_index (cu_index_
), is_static (is_static_
),
26453 operator< (const symbol_value
&other
) const
26473 /* Abstract base class to unify DWARF-32 and DWARF-64 name table
26478 const bfd_endian dwarf5_byte_order
;
26480 explicit offset_vec (bfd_endian dwarf5_byte_order_
)
26481 : dwarf5_byte_order (dwarf5_byte_order_
)
26484 /* Call std::vector::reserve for NELEM elements. */
26485 virtual void reserve (size_t nelem
) = 0;
26487 /* Call std::vector::push_back with store_unsigned_integer byte
26488 reordering for ELEM. */
26489 virtual void push_back_reorder (size_t elem
) = 0;
26491 /* Return expected output size in bytes. */
26492 virtual size_t bytes () const = 0;
26494 /* Write name table to FILE. */
26495 virtual void file_write (FILE *file
) const = 0;
26498 /* Template to unify DWARF-32 and DWARF-64 output. */
26499 template<typename OffsetSize
>
26500 class offset_vec_tmpl
: public offset_vec
26503 explicit offset_vec_tmpl (bfd_endian dwarf5_byte_order_
)
26504 : offset_vec (dwarf5_byte_order_
)
26507 /* Implement offset_vec::reserve. */
26508 void reserve (size_t nelem
) override
26510 m_vec
.reserve (nelem
);
26513 /* Implement offset_vec::push_back_reorder. */
26514 void push_back_reorder (size_t elem
) override
26516 m_vec
.push_back (elem
);
26517 /* Check for overflow. */
26518 gdb_assert (m_vec
.back () == elem
);
26519 store_unsigned_integer (reinterpret_cast<gdb_byte
*> (&m_vec
.back ()),
26520 sizeof (m_vec
.back ()), dwarf5_byte_order
, elem
);
26523 /* Implement offset_vec::bytes. */
26524 size_t bytes () const override
26526 return m_vec
.size () * sizeof (m_vec
[0]);
26529 /* Implement offset_vec::file_write. */
26530 void file_write (FILE *file
) const override
26532 ::file_write (file
, m_vec
);
26536 std::vector
<OffsetSize
> m_vec
;
26539 /* Base class to unify DWARF-32 and DWARF-64 .debug_names output
26540 respecting name table width. */
26544 offset_vec
&name_table_string_offs
, &name_table_entry_offs
;
26546 dwarf (offset_vec
&name_table_string_offs_
,
26547 offset_vec
&name_table_entry_offs_
)
26548 : name_table_string_offs (name_table_string_offs_
),
26549 name_table_entry_offs (name_table_entry_offs_
)
26554 /* Template to unify DWARF-32 and DWARF-64 .debug_names output
26555 respecting name table width. */
26556 template<typename OffsetSize
>
26557 class dwarf_tmpl
: public dwarf
26560 explicit dwarf_tmpl (bfd_endian dwarf5_byte_order_
)
26561 : dwarf (m_name_table_string_offs
, m_name_table_entry_offs
),
26562 m_name_table_string_offs (dwarf5_byte_order_
),
26563 m_name_table_entry_offs (dwarf5_byte_order_
)
26567 offset_vec_tmpl
<OffsetSize
> m_name_table_string_offs
;
26568 offset_vec_tmpl
<OffsetSize
> m_name_table_entry_offs
;
26571 /* Try to reconstruct original DWARF tag for given partial_symbol.
26572 This function is not DWARF-5 compliant but it is sufficient for
26573 GDB as a DWARF-5 index consumer. */
26574 static int psymbol_tag (const struct partial_symbol
*psym
)
26576 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
26577 enum address_class aclass
= PSYMBOL_CLASS (psym
);
26585 return DW_TAG_subprogram
;
26587 return DW_TAG_typedef
;
26589 case LOC_CONST_BYTES
:
26590 case LOC_OPTIMIZED_OUT
:
26592 return DW_TAG_variable
;
26594 /* Note: It's currently impossible to recognize psyms as enum values
26595 short of reading the type info. For now punt. */
26596 return DW_TAG_variable
;
26598 /* There are other LOC_FOO values that one might want to classify
26599 as variables, but dwarf2read.c doesn't currently use them. */
26600 return DW_TAG_variable
;
26602 case STRUCT_DOMAIN
:
26603 return DW_TAG_structure_type
;
26609 /* Call insert for all partial symbols and mark them in PSYMS_SEEN. */
26610 void write_psymbols (std::unordered_set
<partial_symbol
*> &psyms_seen
,
26611 struct partial_symbol
**psymp
, int count
, int cu_index
,
26612 bool is_static
, unit_kind kind
)
26614 for (; count
-- > 0; ++psymp
)
26616 struct partial_symbol
*psym
= *psymp
;
26618 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
26619 error (_("Ada is not currently supported by the index"));
26621 /* Only add a given psymbol once. */
26622 if (psyms_seen
.insert (psym
).second
)
26623 insert (psym
, cu_index
, is_static
, kind
);
26627 /* A helper function that writes a single signatured_type
26628 to a debug_names. */
26630 write_one_signatured_type (struct signatured_type
*entry
,
26631 struct signatured_type_index_data
*info
)
26633 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
26635 write_psymbols (info
->psyms_seen
,
26636 &info
->objfile
->global_psymbols
[psymtab
->globals_offset
],
26637 psymtab
->n_global_syms
, info
->cu_index
, false,
26639 write_psymbols (info
->psyms_seen
,
26640 &info
->objfile
->static_psymbols
[psymtab
->statics_offset
],
26641 psymtab
->n_static_syms
, info
->cu_index
, true,
26644 info
->types_list
.append_uint (dwarf5_offset_size (), m_dwarf5_byte_order
,
26645 to_underlying (entry
->per_cu
.sect_off
));
26650 /* Store value of each symbol. */
26651 std::unordered_map
<c_str_view
, std::set
<symbol_value
>, c_str_view_hasher
>
26652 m_name_to_value_set
;
26654 /* Tables of DWARF-5 .debug_names. They are in object file byte
26656 std::vector
<uint32_t> m_bucket_table
;
26657 std::vector
<uint32_t> m_hash_table
;
26659 const bfd_endian m_dwarf5_byte_order
;
26660 dwarf_tmpl
<uint32_t> m_dwarf32
;
26661 dwarf_tmpl
<uint64_t> m_dwarf64
;
26663 offset_vec
&m_name_table_string_offs
, &m_name_table_entry_offs
;
26664 debug_str_lookup m_debugstrlookup
;
26666 /* Map each used .debug_names abbreviation tag parameter to its
26668 std::unordered_map
<index_key
, int, index_key_hasher
> m_indexkey_to_idx
;
26670 /* Next unused .debug_names abbreviation tag for
26671 m_indexkey_to_idx. */
26672 int m_idx_next
= 1;
26674 /* .debug_names abbreviation table. */
26675 data_buf m_abbrev_table
;
26677 /* .debug_names entry pool. */
26678 data_buf m_entry_pool
;
26681 /* Return iff any of the needed offsets does not fit into 32-bit
26682 .debug_names section. */
26685 check_dwarf64_offsets (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
26687 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
26689 const dwarf2_per_cu_data
&per_cu
= *dwarf2_per_objfile
->all_comp_units
[i
];
26691 if (to_underlying (per_cu
.sect_off
) >= (static_cast<uint64_t> (1) << 32))
26694 for (int i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
26696 const signatured_type
&sigtype
= *dwarf2_per_objfile
->all_type_units
[i
];
26697 const dwarf2_per_cu_data
&per_cu
= sigtype
.per_cu
;
26699 if (to_underlying (per_cu
.sect_off
) >= (static_cast<uint64_t> (1) << 32))
26705 /* The psyms_seen set is potentially going to be largish (~40k
26706 elements when indexing a -g3 build of GDB itself). Estimate the
26707 number of elements in order to avoid too many rehashes, which
26708 require rebuilding buckets and thus many trips to
26712 psyms_seen_size (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
26714 size_t psyms_count
= 0;
26715 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
26717 struct dwarf2_per_cu_data
*per_cu
26718 = dwarf2_per_objfile
->all_comp_units
[i
];
26719 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
26721 if (psymtab
!= NULL
&& psymtab
->user
== NULL
)
26722 recursively_count_psymbols (psymtab
, psyms_count
);
26724 /* Generating an index for gdb itself shows a ratio of
26725 TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */
26726 return psyms_count
/ 4;
26729 /* Write new .gdb_index section for OBJFILE into OUT_FILE.
26730 Return how many bytes were expected to be written into OUT_FILE. */
26733 write_gdbindex (struct dwarf2_per_objfile
*dwarf2_per_objfile
, FILE *out_file
)
26735 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
26736 mapped_symtab symtab
;
26739 /* While we're scanning CU's create a table that maps a psymtab pointer
26740 (which is what addrmap records) to its index (which is what is recorded
26741 in the index file). This will later be needed to write the address
26743 psym_index_map cu_index_htab
;
26744 cu_index_htab
.reserve (dwarf2_per_objfile
->n_comp_units
);
26746 /* The CU list is already sorted, so we don't need to do additional
26747 work here. Also, the debug_types entries do not appear in
26748 all_comp_units, but only in their own hash table. */
26750 std::unordered_set
<partial_symbol
*> psyms_seen
26751 (psyms_seen_size (dwarf2_per_objfile
));
26752 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
26754 struct dwarf2_per_cu_data
*per_cu
26755 = dwarf2_per_objfile
->all_comp_units
[i
];
26756 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
26758 /* CU of a shared file from 'dwz -m' may be unused by this main file.
26759 It may be referenced from a local scope but in such case it does not
26760 need to be present in .gdb_index. */
26761 if (psymtab
== NULL
)
26764 if (psymtab
->user
== NULL
)
26765 recursively_write_psymbols (objfile
, psymtab
, &symtab
,
26768 const auto insertpair
= cu_index_htab
.emplace (psymtab
, i
);
26769 gdb_assert (insertpair
.second
);
26771 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
26772 to_underlying (per_cu
->sect_off
));
26773 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
26776 /* Dump the address map. */
26778 write_address_map (objfile
, addr_vec
, cu_index_htab
);
26780 /* Write out the .debug_type entries, if any. */
26781 data_buf types_cu_list
;
26782 if (dwarf2_per_objfile
->signatured_types
)
26784 signatured_type_index_data
sig_data (types_cu_list
,
26787 sig_data
.objfile
= objfile
;
26788 sig_data
.symtab
= &symtab
;
26789 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
26790 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
26791 write_one_signatured_type
, &sig_data
);
26794 /* Now that we've processed all symbols we can shrink their cu_indices
26796 uniquify_cu_indices (&symtab
);
26798 data_buf symtab_vec
, constant_pool
;
26799 write_hash_table (&symtab
, symtab_vec
, constant_pool
);
26802 const offset_type size_of_contents
= 6 * sizeof (offset_type
);
26803 offset_type total_len
= size_of_contents
;
26805 /* The version number. */
26806 contents
.append_data (MAYBE_SWAP (8));
26808 /* The offset of the CU list from the start of the file. */
26809 contents
.append_data (MAYBE_SWAP (total_len
));
26810 total_len
+= cu_list
.size ();
26812 /* The offset of the types CU list from the start of the file. */
26813 contents
.append_data (MAYBE_SWAP (total_len
));
26814 total_len
+= types_cu_list
.size ();
26816 /* The offset of the address table from the start of the file. */
26817 contents
.append_data (MAYBE_SWAP (total_len
));
26818 total_len
+= addr_vec
.size ();
26820 /* The offset of the symbol table from the start of the file. */
26821 contents
.append_data (MAYBE_SWAP (total_len
));
26822 total_len
+= symtab_vec
.size ();
26824 /* The offset of the constant pool from the start of the file. */
26825 contents
.append_data (MAYBE_SWAP (total_len
));
26826 total_len
+= constant_pool
.size ();
26828 gdb_assert (contents
.size () == size_of_contents
);
26830 contents
.file_write (out_file
);
26831 cu_list
.file_write (out_file
);
26832 types_cu_list
.file_write (out_file
);
26833 addr_vec
.file_write (out_file
);
26834 symtab_vec
.file_write (out_file
);
26835 constant_pool
.file_write (out_file
);
26840 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
26841 static const gdb_byte dwarf5_gdb_augmentation
[] = { 'G', 'D', 'B', 0 };
26843 /* Write a new .debug_names section for OBJFILE into OUT_FILE, write
26844 needed addition to .debug_str section to OUT_FILE_STR. Return how
26845 many bytes were expected to be written into OUT_FILE. */
26848 write_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
26849 FILE *out_file
, FILE *out_file_str
)
26851 const bool dwarf5_is_dwarf64
= check_dwarf64_offsets (dwarf2_per_objfile
);
26852 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
26853 const enum bfd_endian dwarf5_byte_order
26854 = gdbarch_byte_order (get_objfile_arch (objfile
));
26856 /* The CU list is already sorted, so we don't need to do additional
26857 work here. Also, the debug_types entries do not appear in
26858 all_comp_units, but only in their own hash table. */
26860 debug_names
nametable (dwarf2_per_objfile
, dwarf5_is_dwarf64
,
26861 dwarf5_byte_order
);
26862 std::unordered_set
<partial_symbol
*>
26863 psyms_seen (psyms_seen_size (dwarf2_per_objfile
));
26864 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
26866 const dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->all_comp_units
[i
];
26867 partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
26869 /* CU of a shared file from 'dwz -m' may be unused by this main
26870 file. It may be referenced from a local scope but in such
26871 case it does not need to be present in .debug_names. */
26872 if (psymtab
== NULL
)
26875 if (psymtab
->user
== NULL
)
26876 nametable
.recursively_write_psymbols (objfile
, psymtab
, psyms_seen
, i
);
26878 cu_list
.append_uint (nametable
.dwarf5_offset_size (), dwarf5_byte_order
,
26879 to_underlying (per_cu
->sect_off
));
26882 /* Write out the .debug_type entries, if any. */
26883 data_buf types_cu_list
;
26884 if (dwarf2_per_objfile
->signatured_types
)
26886 debug_names::write_one_signatured_type_data
sig_data (nametable
,
26887 signatured_type_index_data (types_cu_list
, psyms_seen
));
26889 sig_data
.info
.objfile
= objfile
;
26890 /* It is used only for gdb_index. */
26891 sig_data
.info
.symtab
= nullptr;
26892 sig_data
.info
.cu_index
= 0;
26893 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
26894 debug_names::write_one_signatured_type
,
26898 nametable
.build ();
26900 /* No addr_vec - DWARF-5 uses .debug_aranges generated by GCC. */
26902 const offset_type bytes_of_header
26903 = ((dwarf5_is_dwarf64
? 12 : 4)
26905 + sizeof (dwarf5_gdb_augmentation
));
26906 size_t expected_bytes
= 0;
26907 expected_bytes
+= bytes_of_header
;
26908 expected_bytes
+= cu_list
.size ();
26909 expected_bytes
+= types_cu_list
.size ();
26910 expected_bytes
+= nametable
.bytes ();
26913 if (!dwarf5_is_dwarf64
)
26915 const uint64_t size64
= expected_bytes
- 4;
26916 gdb_assert (size64
< 0xfffffff0);
26917 header
.append_uint (4, dwarf5_byte_order
, size64
);
26921 header
.append_uint (4, dwarf5_byte_order
, 0xffffffff);
26922 header
.append_uint (8, dwarf5_byte_order
, expected_bytes
- 12);
26925 /* The version number. */
26926 header
.append_uint (2, dwarf5_byte_order
, 5);
26929 header
.append_uint (2, dwarf5_byte_order
, 0);
26931 /* comp_unit_count - The number of CUs in the CU list. */
26932 header
.append_uint (4, dwarf5_byte_order
, dwarf2_per_objfile
->n_comp_units
);
26934 /* local_type_unit_count - The number of TUs in the local TU
26936 header
.append_uint (4, dwarf5_byte_order
, dwarf2_per_objfile
->n_type_units
);
26938 /* foreign_type_unit_count - The number of TUs in the foreign TU
26940 header
.append_uint (4, dwarf5_byte_order
, 0);
26942 /* bucket_count - The number of hash buckets in the hash lookup
26944 header
.append_uint (4, dwarf5_byte_order
, nametable
.bucket_count ());
26946 /* name_count - The number of unique names in the index. */
26947 header
.append_uint (4, dwarf5_byte_order
, nametable
.name_count ());
26949 /* abbrev_table_size - The size in bytes of the abbreviations
26951 header
.append_uint (4, dwarf5_byte_order
, nametable
.abbrev_table_bytes ());
26953 /* augmentation_string_size - The size in bytes of the augmentation
26954 string. This value is rounded up to a multiple of 4. */
26955 static_assert (sizeof (dwarf5_gdb_augmentation
) % 4 == 0, "");
26956 header
.append_uint (4, dwarf5_byte_order
, sizeof (dwarf5_gdb_augmentation
));
26957 header
.append_data (dwarf5_gdb_augmentation
);
26959 gdb_assert (header
.size () == bytes_of_header
);
26961 header
.file_write (out_file
);
26962 cu_list
.file_write (out_file
);
26963 types_cu_list
.file_write (out_file
);
26964 nametable
.file_write (out_file
, out_file_str
);
26966 return expected_bytes
;
26969 /* Assert that FILE's size is EXPECTED_SIZE. Assumes file's seek
26970 position is at the end of the file. */
26973 assert_file_size (FILE *file
, const char *filename
, size_t expected_size
)
26975 const auto file_size
= ftell (file
);
26976 if (file_size
== -1)
26977 error (_("Can't get `%s' size"), filename
);
26978 gdb_assert (file_size
== expected_size
);
26981 /* Create an index file for OBJFILE in the directory DIR. */
26984 write_psymtabs_to_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
26986 dw_index_kind index_kind
)
26988 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
26990 if (dwarf2_per_objfile
->using_index
)
26991 error (_("Cannot use an index to create the index"));
26993 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
26994 error (_("Cannot make an index when the file has multiple .debug_types sections"));
26996 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
27000 if (stat (objfile_name (objfile
), &st
) < 0)
27001 perror_with_name (objfile_name (objfile
));
27003 std::string
filename (std::string (dir
) + SLASH_STRING
27004 + lbasename (objfile_name (objfile
))
27005 + (index_kind
== dw_index_kind::DEBUG_NAMES
27006 ? INDEX5_SUFFIX
: INDEX4_SUFFIX
));
27008 FILE *out_file
= gdb_fopen_cloexec (filename
.c_str (), "wb").release ();
27010 error (_("Can't open `%s' for writing"), filename
.c_str ());
27012 /* Order matters here; we want FILE to be closed before FILENAME is
27013 unlinked, because on MS-Windows one cannot delete a file that is
27014 still open. (Don't call anything here that might throw until
27015 file_closer is created.) */
27016 gdb::unlinker
unlink_file (filename
.c_str ());
27017 gdb_file_up
close_out_file (out_file
);
27019 if (index_kind
== dw_index_kind::DEBUG_NAMES
)
27021 std::string
filename_str (std::string (dir
) + SLASH_STRING
27022 + lbasename (objfile_name (objfile
))
27023 + DEBUG_STR_SUFFIX
);
27025 = gdb_fopen_cloexec (filename_str
.c_str (), "wb").release ();
27027 error (_("Can't open `%s' for writing"), filename_str
.c_str ());
27028 gdb::unlinker
unlink_file_str (filename_str
.c_str ());
27029 gdb_file_up
close_out_file_str (out_file_str
);
27031 const size_t total_len
27032 = write_debug_names (dwarf2_per_objfile
, out_file
, out_file_str
);
27033 assert_file_size (out_file
, filename
.c_str (), total_len
);
27035 /* We want to keep the file .debug_str file too. */
27036 unlink_file_str
.keep ();
27040 const size_t total_len
27041 = write_gdbindex (dwarf2_per_objfile
, out_file
);
27042 assert_file_size (out_file
, filename
.c_str (), total_len
);
27045 /* We want to keep the file. */
27046 unlink_file
.keep ();
27049 /* Implementation of the `save gdb-index' command.
27051 Note that the .gdb_index file format used by this command is
27052 documented in the GDB manual. Any changes here must be documented
27056 save_gdb_index_command (const char *arg
, int from_tty
)
27058 struct objfile
*objfile
;
27059 const char dwarf5space
[] = "-dwarf-5 ";
27060 dw_index_kind index_kind
= dw_index_kind::GDB_INDEX
;
27065 arg
= skip_spaces (arg
);
27066 if (strncmp (arg
, dwarf5space
, strlen (dwarf5space
)) == 0)
27068 index_kind
= dw_index_kind::DEBUG_NAMES
;
27069 arg
+= strlen (dwarf5space
);
27070 arg
= skip_spaces (arg
);
27074 error (_("usage: save gdb-index [-dwarf-5] DIRECTORY"));
27076 ALL_OBJFILES (objfile
)
27080 /* If the objfile does not correspond to an actual file, skip it. */
27081 if (stat (objfile_name (objfile
), &st
) < 0)
27084 struct dwarf2_per_objfile
*dwarf2_per_objfile
27085 = get_dwarf2_per_objfile (objfile
);
27087 if (dwarf2_per_objfile
!= NULL
)
27091 write_psymtabs_to_index (dwarf2_per_objfile
, arg
, index_kind
);
27093 CATCH (except
, RETURN_MASK_ERROR
)
27095 exception_fprintf (gdb_stderr
, except
,
27096 _("Error while writing index for `%s': "),
27097 objfile_name (objfile
));
27107 int dwarf_always_disassemble
;
27110 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
27111 struct cmd_list_element
*c
, const char *value
)
27113 fprintf_filtered (file
,
27114 _("Whether to always disassemble "
27115 "DWARF expressions is %s.\n"),
27120 show_check_physname (struct ui_file
*file
, int from_tty
,
27121 struct cmd_list_element
*c
, const char *value
)
27123 fprintf_filtered (file
,
27124 _("Whether to check \"physname\" is %s.\n"),
27129 _initialize_dwarf2_read (void)
27131 struct cmd_list_element
*c
;
27133 dwarf2_objfile_data_key
= register_objfile_data ();
27135 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
27136 Set DWARF specific variables.\n\
27137 Configure DWARF variables such as the cache size"),
27138 &set_dwarf_cmdlist
, "maintenance set dwarf ",
27139 0/*allow-unknown*/, &maintenance_set_cmdlist
);
27141 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
27142 Show DWARF specific variables\n\
27143 Show DWARF variables such as the cache size"),
27144 &show_dwarf_cmdlist
, "maintenance show dwarf ",
27145 0/*allow-unknown*/, &maintenance_show_cmdlist
);
27147 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
27148 &dwarf_max_cache_age
, _("\
27149 Set the upper bound on the age of cached DWARF compilation units."), _("\
27150 Show the upper bound on the age of cached DWARF compilation units."), _("\
27151 A higher limit means that cached compilation units will be stored\n\
27152 in memory longer, and more total memory will be used. Zero disables\n\
27153 caching, which can slow down startup."),
27155 show_dwarf_max_cache_age
,
27156 &set_dwarf_cmdlist
,
27157 &show_dwarf_cmdlist
);
27159 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
27160 &dwarf_always_disassemble
, _("\
27161 Set whether `info address' always disassembles DWARF expressions."), _("\
27162 Show whether `info address' always disassembles DWARF expressions."), _("\
27163 When enabled, DWARF expressions are always printed in an assembly-like\n\
27164 syntax. When disabled, expressions will be printed in a more\n\
27165 conversational style, when possible."),
27167 show_dwarf_always_disassemble
,
27168 &set_dwarf_cmdlist
,
27169 &show_dwarf_cmdlist
);
27171 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
27172 Set debugging of the DWARF reader."), _("\
27173 Show debugging of the DWARF reader."), _("\
27174 When enabled (non-zero), debugging messages are printed during DWARF\n\
27175 reading and symtab expansion. A value of 1 (one) provides basic\n\
27176 information. A value greater than 1 provides more verbose information."),
27179 &setdebuglist
, &showdebuglist
);
27181 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
27182 Set debugging of the DWARF DIE reader."), _("\
27183 Show debugging of the DWARF DIE reader."), _("\
27184 When enabled (non-zero), DIEs are dumped after they are read in.\n\
27185 The value is the maximum depth to print."),
27188 &setdebuglist
, &showdebuglist
);
27190 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
27191 Set debugging of the dwarf line reader."), _("\
27192 Show debugging of the dwarf line reader."), _("\
27193 When enabled (non-zero), line number entries are dumped as they are read in.\n\
27194 A value of 1 (one) provides basic information.\n\
27195 A value greater than 1 provides more verbose information."),
27198 &setdebuglist
, &showdebuglist
);
27200 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
27201 Set cross-checking of \"physname\" code against demangler."), _("\
27202 Show cross-checking of \"physname\" code against demangler."), _("\
27203 When enabled, GDB's internal \"physname\" code is checked against\n\
27205 NULL
, show_check_physname
,
27206 &setdebuglist
, &showdebuglist
);
27208 add_setshow_boolean_cmd ("use-deprecated-index-sections",
27209 no_class
, &use_deprecated_index_sections
, _("\
27210 Set whether to use deprecated gdb_index sections."), _("\
27211 Show whether to use deprecated gdb_index sections."), _("\
27212 When enabled, deprecated .gdb_index sections are used anyway.\n\
27213 Normally they are ignored either because of a missing feature or\n\
27214 performance issue.\n\
27215 Warning: This option must be enabled before gdb reads the file."),
27218 &setlist
, &showlist
);
27220 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
27222 Save a gdb-index file.\n\
27223 Usage: save gdb-index [-dwarf-5] DIRECTORY\n\
27225 No options create one file with .gdb-index extension for pre-DWARF-5\n\
27226 compatible .gdb_index section. With -dwarf-5 creates two files with\n\
27227 extension .debug_names and .debug_str for DWARF-5 .debug_names section."),
27229 set_cmd_completer (c
, filename_completer
);
27231 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
27232 &dwarf2_locexpr_funcs
);
27233 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
27234 &dwarf2_loclist_funcs
);
27236 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
27237 &dwarf2_block_frame_base_locexpr_funcs
);
27238 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
27239 &dwarf2_block_frame_base_loclist_funcs
);
27242 selftests::register_test ("dw2_expand_symtabs_matching",
27243 selftests::dw2_expand_symtabs_matching::run_test
);