1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2017 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 "filename-seen-cache.h"
80 #include <sys/types.h>
82 #include <unordered_set>
83 #include <unordered_map>
86 /* When == 1, print basic high level tracing messages.
87 When > 1, be more verbose.
88 This is in contrast to the low level DIE reading of dwarf_die_debug. */
89 static unsigned int dwarf_read_debug
= 0;
91 /* When non-zero, dump DIEs after they are read in. */
92 static unsigned int dwarf_die_debug
= 0;
94 /* When non-zero, dump line number entries as they are read in. */
95 static unsigned int dwarf_line_debug
= 0;
97 /* When non-zero, cross-check physname against demangler. */
98 static int check_physname
= 0;
100 /* When non-zero, do not reject deprecated .gdb_index sections. */
101 static int use_deprecated_index_sections
= 0;
103 static const struct objfile_data
*dwarf2_objfile_data_key
;
105 /* The "aclass" indices for various kinds of computed DWARF symbols. */
107 static int dwarf2_locexpr_index
;
108 static int dwarf2_loclist_index
;
109 static int dwarf2_locexpr_block_index
;
110 static int dwarf2_loclist_block_index
;
112 /* A descriptor for dwarf sections.
114 S.ASECTION, SIZE are typically initialized when the objfile is first
115 scanned. BUFFER, READIN are filled in later when the section is read.
116 If the section contained compressed data then SIZE is updated to record
117 the uncompressed size of the section.
119 DWP file format V2 introduces a wrinkle that is easiest to handle by
120 creating the concept of virtual sections contained within a real section.
121 In DWP V2 the sections of the input DWO files are concatenated together
122 into one section, but section offsets are kept relative to the original
124 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
125 the real section this "virtual" section is contained in, and BUFFER,SIZE
126 describe the virtual section. */
128 struct dwarf2_section_info
132 /* If this is a real section, the bfd section. */
134 /* If this is a virtual section, pointer to the containing ("real")
136 struct dwarf2_section_info
*containing_section
;
138 /* Pointer to section data, only valid if readin. */
139 const gdb_byte
*buffer
;
140 /* The size of the section, real or virtual. */
142 /* If this is a virtual section, the offset in the real section.
143 Only valid if is_virtual. */
144 bfd_size_type virtual_offset
;
145 /* True if we have tried to read this section. */
147 /* True if this is a virtual section, False otherwise.
148 This specifies which of s.section and s.containing_section to use. */
152 typedef struct dwarf2_section_info dwarf2_section_info_def
;
153 DEF_VEC_O (dwarf2_section_info_def
);
155 /* All offsets in the index are of this type. It must be
156 architecture-independent. */
157 typedef uint32_t offset_type
;
159 DEF_VEC_I (offset_type
);
161 /* Ensure only legit values are used. */
162 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
164 gdb_assert ((unsigned int) (value) <= 1); \
165 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
168 /* Ensure only legit values are used. */
169 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
171 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
172 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
173 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
176 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
177 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
179 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
180 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
185 /* Convert VALUE between big- and little-endian. */
188 byte_swap (offset_type value
)
192 result
= (value
& 0xff) << 24;
193 result
|= (value
& 0xff00) << 8;
194 result
|= (value
& 0xff0000) >> 8;
195 result
|= (value
& 0xff000000) >> 24;
199 #define MAYBE_SWAP(V) byte_swap (V)
202 #define MAYBE_SWAP(V) static_cast<offset_type> (V)
203 #endif /* WORDS_BIGENDIAN */
205 /* An index into a (C++) symbol name component in a symbol name as
206 recorded in the mapped_index's symbol table. For each C++ symbol
207 in the symbol table, we record one entry for the start of each
208 component in the symbol in a table of name components, and then
209 sort the table, in order to be able to binary search symbol names,
210 ignoring leading namespaces, both completion and regular look up.
211 For example, for symbol "A::B::C", we'll have an entry that points
212 to "A::B::C", another that points to "B::C", and another for "C".
213 Note that function symbols in GDB index have no parameter
214 information, just the function/method names. You can convert a
215 name_component to a "const char *" using the
216 'mapped_index::symbol_name_at(offset_type)' method. */
218 struct name_component
220 /* Offset in the symbol name where the component starts. Stored as
221 a (32-bit) offset instead of a pointer to save memory and improve
222 locality on 64-bit architectures. */
223 offset_type name_offset
;
225 /* The symbol's index in the symbol and constant pool tables of a
230 /* A description of the mapped index. The file format is described in
231 a comment by the code that writes the index. */
234 /* Index data format version. */
237 /* The total length of the buffer. */
240 /* A pointer to the address table data. */
241 const gdb_byte
*address_table
;
243 /* Size of the address table data in bytes. */
244 offset_type address_table_size
;
246 /* The symbol table, implemented as a hash table. */
247 const offset_type
*symbol_table
;
249 /* Size in slots, each slot is 2 offset_types. */
250 offset_type symbol_table_slots
;
252 /* A pointer to the constant pool. */
253 const char *constant_pool
;
255 /* The name_component table (a sorted vector). See name_component's
256 description above. */
257 std::vector
<name_component
> name_components
;
259 /* How NAME_COMPONENTS is sorted. */
260 enum case_sensitivity name_components_casing
;
262 /* Convenience method to get at the name of the symbol at IDX in the
264 const char *symbol_name_at (offset_type idx
) const
265 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
]); }
267 /* Build the symbol name component sorted vector, if we haven't
269 void build_name_components ();
271 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
272 possible matches for LN_NO_PARAMS in the name component
274 std::pair
<std::vector
<name_component
>::const_iterator
,
275 std::vector
<name_component
>::const_iterator
>
276 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
279 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
280 DEF_VEC_P (dwarf2_per_cu_ptr
);
284 int nr_uniq_abbrev_tables
;
286 int nr_symtab_sharers
;
287 int nr_stmt_less_type_units
;
288 int nr_all_type_units_reallocs
;
291 /* Collection of data recorded per objfile.
292 This hangs off of dwarf2_objfile_data_key. */
294 struct dwarf2_per_objfile
296 /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the
297 dwarf2 section names, or is NULL if the standard ELF names are
299 dwarf2_per_objfile (struct objfile
*objfile
,
300 const dwarf2_debug_sections
*names
);
302 ~dwarf2_per_objfile ();
304 DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile
);
306 /* Free all cached compilation units. */
307 void free_cached_comp_units ();
309 /* This function is mapped across the sections and remembers the
310 offset and size of each of the debugging sections we are
312 void locate_sections (bfd
*abfd
, asection
*sectp
,
313 const dwarf2_debug_sections
&names
);
316 dwarf2_section_info info
{};
317 dwarf2_section_info abbrev
{};
318 dwarf2_section_info line
{};
319 dwarf2_section_info loc
{};
320 dwarf2_section_info loclists
{};
321 dwarf2_section_info macinfo
{};
322 dwarf2_section_info macro
{};
323 dwarf2_section_info str
{};
324 dwarf2_section_info line_str
{};
325 dwarf2_section_info ranges
{};
326 dwarf2_section_info rnglists
{};
327 dwarf2_section_info addr
{};
328 dwarf2_section_info frame
{};
329 dwarf2_section_info eh_frame
{};
330 dwarf2_section_info gdb_index
{};
332 VEC (dwarf2_section_info_def
) *types
= NULL
;
335 struct objfile
*objfile
= NULL
;
337 /* Table of all the compilation units. This is used to locate
338 the target compilation unit of a particular reference. */
339 struct dwarf2_per_cu_data
**all_comp_units
= NULL
;
341 /* The number of compilation units in ALL_COMP_UNITS. */
342 int n_comp_units
= 0;
344 /* The number of .debug_types-related CUs. */
345 int n_type_units
= 0;
347 /* The number of elements allocated in all_type_units.
348 If there are skeleton-less TUs, we add them to all_type_units lazily. */
349 int n_allocated_type_units
= 0;
351 /* The .debug_types-related CUs (TUs).
352 This is stored in malloc space because we may realloc it. */
353 struct signatured_type
**all_type_units
= NULL
;
355 /* Table of struct type_unit_group objects.
356 The hash key is the DW_AT_stmt_list value. */
357 htab_t type_unit_groups
{};
359 /* A table mapping .debug_types signatures to its signatured_type entry.
360 This is NULL if the .debug_types section hasn't been read in yet. */
361 htab_t signatured_types
{};
363 /* Type unit statistics, to see how well the scaling improvements
365 struct tu_stats tu_stats
{};
367 /* A chain of compilation units that are currently read in, so that
368 they can be freed later. */
369 dwarf2_per_cu_data
*read_in_chain
= NULL
;
371 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
372 This is NULL if the table hasn't been allocated yet. */
375 /* True if we've checked for whether there is a DWP file. */
376 bool dwp_checked
= false;
378 /* The DWP file if there is one, or NULL. */
379 struct dwp_file
*dwp_file
= NULL
;
381 /* The shared '.dwz' file, if one exists. This is used when the
382 original data was compressed using 'dwz -m'. */
383 struct dwz_file
*dwz_file
= NULL
;
385 /* A flag indicating whether this objfile has a section loaded at a
387 bool has_section_at_zero
= false;
389 /* True if we are using the mapped index,
390 or we are faking it for OBJF_READNOW's sake. */
391 bool using_index
= false;
393 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
394 mapped_index
*index_table
= NULL
;
396 /* When using index_table, this keeps track of all quick_file_names entries.
397 TUs typically share line table entries with a CU, so we maintain a
398 separate table of all line table entries to support the sharing.
399 Note that while there can be way more TUs than CUs, we've already
400 sorted all the TUs into "type unit groups", grouped by their
401 DW_AT_stmt_list value. Therefore the only sharing done here is with a
402 CU and its associated TU group if there is one. */
403 htab_t quick_file_names_table
{};
405 /* Set during partial symbol reading, to prevent queueing of full
407 bool reading_partial_symbols
= false;
409 /* Table mapping type DIEs to their struct type *.
410 This is NULL if not allocated yet.
411 The mapping is done via (CU/TU + DIE offset) -> type. */
412 htab_t die_type_hash
{};
414 /* The CUs we recently read. */
415 VEC (dwarf2_per_cu_ptr
) *just_read_cus
= NULL
;
417 /* Table containing line_header indexed by offset and offset_in_dwz. */
418 htab_t line_header_hash
{};
420 /* Table containing all filenames. This is an optional because the
421 table is lazily constructed on first access. */
422 gdb::optional
<filename_seen_cache
> filenames_cache
;
425 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
427 /* Default names of the debugging sections. */
429 /* Note that if the debugging section has been compressed, it might
430 have a name like .zdebug_info. */
432 static const struct dwarf2_debug_sections dwarf2_elf_names
=
434 { ".debug_info", ".zdebug_info" },
435 { ".debug_abbrev", ".zdebug_abbrev" },
436 { ".debug_line", ".zdebug_line" },
437 { ".debug_loc", ".zdebug_loc" },
438 { ".debug_loclists", ".zdebug_loclists" },
439 { ".debug_macinfo", ".zdebug_macinfo" },
440 { ".debug_macro", ".zdebug_macro" },
441 { ".debug_str", ".zdebug_str" },
442 { ".debug_line_str", ".zdebug_line_str" },
443 { ".debug_ranges", ".zdebug_ranges" },
444 { ".debug_rnglists", ".zdebug_rnglists" },
445 { ".debug_types", ".zdebug_types" },
446 { ".debug_addr", ".zdebug_addr" },
447 { ".debug_frame", ".zdebug_frame" },
448 { ".eh_frame", NULL
},
449 { ".gdb_index", ".zgdb_index" },
453 /* List of DWO/DWP sections. */
455 static const struct dwop_section_names
457 struct dwarf2_section_names abbrev_dwo
;
458 struct dwarf2_section_names info_dwo
;
459 struct dwarf2_section_names line_dwo
;
460 struct dwarf2_section_names loc_dwo
;
461 struct dwarf2_section_names loclists_dwo
;
462 struct dwarf2_section_names macinfo_dwo
;
463 struct dwarf2_section_names macro_dwo
;
464 struct dwarf2_section_names str_dwo
;
465 struct dwarf2_section_names str_offsets_dwo
;
466 struct dwarf2_section_names types_dwo
;
467 struct dwarf2_section_names cu_index
;
468 struct dwarf2_section_names tu_index
;
472 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
473 { ".debug_info.dwo", ".zdebug_info.dwo" },
474 { ".debug_line.dwo", ".zdebug_line.dwo" },
475 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
476 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
477 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
478 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
479 { ".debug_str.dwo", ".zdebug_str.dwo" },
480 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
481 { ".debug_types.dwo", ".zdebug_types.dwo" },
482 { ".debug_cu_index", ".zdebug_cu_index" },
483 { ".debug_tu_index", ".zdebug_tu_index" },
486 /* local data types */
488 /* The data in a compilation unit header, after target2host
489 translation, looks like this. */
490 struct comp_unit_head
494 unsigned char addr_size
;
495 unsigned char signed_addr_p
;
496 sect_offset abbrev_sect_off
;
498 /* Size of file offsets; either 4 or 8. */
499 unsigned int offset_size
;
501 /* Size of the length field; either 4 or 12. */
502 unsigned int initial_length_size
;
504 enum dwarf_unit_type unit_type
;
506 /* Offset to the first byte of this compilation unit header in the
507 .debug_info section, for resolving relative reference dies. */
508 sect_offset sect_off
;
510 /* Offset to first die in this cu from the start of the cu.
511 This will be the first byte following the compilation unit header. */
512 cu_offset first_die_cu_offset
;
514 /* 64-bit signature of this type unit - it is valid only for
515 UNIT_TYPE DW_UT_type. */
518 /* For types, offset in the type's DIE of the type defined by this TU. */
519 cu_offset type_cu_offset_in_tu
;
522 /* Type used for delaying computation of method physnames.
523 See comments for compute_delayed_physnames. */
524 struct delayed_method_info
526 /* The type to which the method is attached, i.e., its parent class. */
529 /* The index of the method in the type's function fieldlists. */
532 /* The index of the method in the fieldlist. */
535 /* The name of the DIE. */
538 /* The DIE associated with this method. */
539 struct die_info
*die
;
542 typedef struct delayed_method_info delayed_method_info
;
543 DEF_VEC_O (delayed_method_info
);
545 /* Internal state when decoding a particular compilation unit. */
548 /* The objfile containing this compilation unit. */
549 struct objfile
*objfile
;
551 /* The header of the compilation unit. */
552 struct comp_unit_head header
;
554 /* Base address of this compilation unit. */
555 CORE_ADDR base_address
;
557 /* Non-zero if base_address has been set. */
560 /* The language we are debugging. */
561 enum language language
;
562 const struct language_defn
*language_defn
;
564 const char *producer
;
566 /* The generic symbol table building routines have separate lists for
567 file scope symbols and all all other scopes (local scopes). So
568 we need to select the right one to pass to add_symbol_to_list().
569 We do it by keeping a pointer to the correct list in list_in_scope.
571 FIXME: The original dwarf code just treated the file scope as the
572 first local scope, and all other local scopes as nested local
573 scopes, and worked fine. Check to see if we really need to
574 distinguish these in buildsym.c. */
575 struct pending
**list_in_scope
;
577 /* The abbrev table for this CU.
578 Normally this points to the abbrev table in the objfile.
579 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
580 struct abbrev_table
*abbrev_table
;
582 /* Hash table holding all the loaded partial DIEs
583 with partial_die->offset.SECT_OFF as hash. */
586 /* Storage for things with the same lifetime as this read-in compilation
587 unit, including partial DIEs. */
588 struct obstack comp_unit_obstack
;
590 /* When multiple dwarf2_cu structures are living in memory, this field
591 chains them all together, so that they can be released efficiently.
592 We will probably also want a generation counter so that most-recently-used
593 compilation units are cached... */
594 struct dwarf2_per_cu_data
*read_in_chain
;
596 /* Backlink to our per_cu entry. */
597 struct dwarf2_per_cu_data
*per_cu
;
599 /* How many compilation units ago was this CU last referenced? */
602 /* A hash table of DIE cu_offset for following references with
603 die_info->offset.sect_off as hash. */
606 /* Full DIEs if read in. */
607 struct die_info
*dies
;
609 /* A set of pointers to dwarf2_per_cu_data objects for compilation
610 units referenced by this one. Only set during full symbol processing;
611 partial symbol tables do not have dependencies. */
614 /* Header data from the line table, during full symbol processing. */
615 struct line_header
*line_header
;
616 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
617 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
618 this is the DW_TAG_compile_unit die for this CU. We'll hold on
619 to the line header as long as this DIE is being processed. See
620 process_die_scope. */
621 die_info
*line_header_die_owner
;
623 /* A list of methods which need to have physnames computed
624 after all type information has been read. */
625 VEC (delayed_method_info
) *method_list
;
627 /* To be copied to symtab->call_site_htab. */
628 htab_t call_site_htab
;
630 /* Non-NULL if this CU came from a DWO file.
631 There is an invariant here that is important to remember:
632 Except for attributes copied from the top level DIE in the "main"
633 (or "stub") file in preparation for reading the DWO file
634 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
635 Either there isn't a DWO file (in which case this is NULL and the point
636 is moot), or there is and either we're not going to read it (in which
637 case this is NULL) or there is and we are reading it (in which case this
639 struct dwo_unit
*dwo_unit
;
641 /* The DW_AT_addr_base attribute if present, zero otherwise
642 (zero is a valid value though).
643 Note this value comes from the Fission stub CU/TU's DIE. */
646 /* The DW_AT_ranges_base attribute if present, zero otherwise
647 (zero is a valid value though).
648 Note this value comes from the Fission stub CU/TU's DIE.
649 Also note that the value is zero in the non-DWO case so this value can
650 be used without needing to know whether DWO files are in use or not.
651 N.B. This does not apply to DW_AT_ranges appearing in
652 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
653 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
654 DW_AT_ranges_base *would* have to be applied, and we'd have to care
655 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
656 ULONGEST ranges_base
;
658 /* Mark used when releasing cached dies. */
659 unsigned int mark
: 1;
661 /* This CU references .debug_loc. See the symtab->locations_valid field.
662 This test is imperfect as there may exist optimized debug code not using
663 any location list and still facing inlining issues if handled as
664 unoptimized code. For a future better test see GCC PR other/32998. */
665 unsigned int has_loclist
: 1;
667 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
668 if all the producer_is_* fields are valid. This information is cached
669 because profiling CU expansion showed excessive time spent in
670 producer_is_gxx_lt_4_6. */
671 unsigned int checked_producer
: 1;
672 unsigned int producer_is_gxx_lt_4_6
: 1;
673 unsigned int producer_is_gcc_lt_4_3
: 1;
674 unsigned int producer_is_icc_lt_14
: 1;
676 /* When set, the file that we're processing is known to have
677 debugging info for C++ namespaces. GCC 3.3.x did not produce
678 this information, but later versions do. */
680 unsigned int processing_has_namespace_info
: 1;
683 /* Persistent data held for a compilation unit, even when not
684 processing it. We put a pointer to this structure in the
685 read_symtab_private field of the psymtab. */
687 struct dwarf2_per_cu_data
689 /* The start offset and length of this compilation unit.
690 NOTE: Unlike comp_unit_head.length, this length includes
692 If the DIE refers to a DWO file, this is always of the original die,
694 sect_offset sect_off
;
697 /* DWARF standard version this data has been read from (such as 4 or 5). */
700 /* Flag indicating this compilation unit will be read in before
701 any of the current compilation units are processed. */
702 unsigned int queued
: 1;
704 /* This flag will be set when reading partial DIEs if we need to load
705 absolutely all DIEs for this compilation unit, instead of just the ones
706 we think are interesting. It gets set if we look for a DIE in the
707 hash table and don't find it. */
708 unsigned int load_all_dies
: 1;
710 /* Non-zero if this CU is from .debug_types.
711 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
713 unsigned int is_debug_types
: 1;
715 /* Non-zero if this CU is from the .dwz file. */
716 unsigned int is_dwz
: 1;
718 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
719 This flag is only valid if is_debug_types is true.
720 We can't read a CU directly from a DWO file: There are required
721 attributes in the stub. */
722 unsigned int reading_dwo_directly
: 1;
724 /* Non-zero if the TU has been read.
725 This is used to assist the "Stay in DWO Optimization" for Fission:
726 When reading a DWO, it's faster to read TUs from the DWO instead of
727 fetching them from random other DWOs (due to comdat folding).
728 If the TU has already been read, the optimization is unnecessary
729 (and unwise - we don't want to change where gdb thinks the TU lives
731 This flag is only valid if is_debug_types is true. */
732 unsigned int tu_read
: 1;
734 /* The section this CU/TU lives in.
735 If the DIE refers to a DWO file, this is always the original die,
737 struct dwarf2_section_info
*section
;
739 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
740 of the CU cache it gets reset to NULL again. This is left as NULL for
741 dummy CUs (a CU header, but nothing else). */
742 struct dwarf2_cu
*cu
;
744 /* The corresponding objfile.
745 Normally we can get the objfile from dwarf2_per_objfile.
746 However we can enter this file with just a "per_cu" handle. */
747 struct objfile
*objfile
;
749 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
750 is active. Otherwise, the 'psymtab' field is active. */
753 /* The partial symbol table associated with this compilation unit,
754 or NULL for unread partial units. */
755 struct partial_symtab
*psymtab
;
757 /* Data needed by the "quick" functions. */
758 struct dwarf2_per_cu_quick_data
*quick
;
761 /* The CUs we import using DW_TAG_imported_unit. This is filled in
762 while reading psymtabs, used to compute the psymtab dependencies,
763 and then cleared. Then it is filled in again while reading full
764 symbols, and only deleted when the objfile is destroyed.
766 This is also used to work around a difference between the way gold
767 generates .gdb_index version <=7 and the way gdb does. Arguably this
768 is a gold bug. For symbols coming from TUs, gold records in the index
769 the CU that includes the TU instead of the TU itself. This breaks
770 dw2_lookup_symbol: It assumes that if the index says symbol X lives
771 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
772 will find X. Alas TUs live in their own symtab, so after expanding CU Y
773 we need to look in TU Z to find X. Fortunately, this is akin to
774 DW_TAG_imported_unit, so we just use the same mechanism: For
775 .gdb_index version <=7 this also records the TUs that the CU referred
776 to. Concurrently with this change gdb was modified to emit version 8
777 indices so we only pay a price for gold generated indices.
778 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
779 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
782 /* Entry in the signatured_types hash table. */
784 struct signatured_type
786 /* The "per_cu" object of this type.
787 This struct is used iff per_cu.is_debug_types.
788 N.B.: This is the first member so that it's easy to convert pointers
790 struct dwarf2_per_cu_data per_cu
;
792 /* The type's signature. */
795 /* Offset in the TU of the type's DIE, as read from the TU header.
796 If this TU is a DWO stub and the definition lives in a DWO file
797 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
798 cu_offset type_offset_in_tu
;
800 /* Offset in the section of the type's DIE.
801 If the definition lives in a DWO file, this is the offset in the
802 .debug_types.dwo section.
803 The value is zero until the actual value is known.
804 Zero is otherwise not a valid section offset. */
805 sect_offset type_offset_in_section
;
807 /* Type units are grouped by their DW_AT_stmt_list entry so that they
808 can share them. This points to the containing symtab. */
809 struct type_unit_group
*type_unit_group
;
812 The first time we encounter this type we fully read it in and install it
813 in the symbol tables. Subsequent times we only need the type. */
816 /* Containing DWO unit.
817 This field is valid iff per_cu.reading_dwo_directly. */
818 struct dwo_unit
*dwo_unit
;
821 typedef struct signatured_type
*sig_type_ptr
;
822 DEF_VEC_P (sig_type_ptr
);
824 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
825 This includes type_unit_group and quick_file_names. */
827 struct stmt_list_hash
829 /* The DWO unit this table is from or NULL if there is none. */
830 struct dwo_unit
*dwo_unit
;
832 /* Offset in .debug_line or .debug_line.dwo. */
833 sect_offset line_sect_off
;
836 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
837 an object of this type. */
839 struct type_unit_group
841 /* dwarf2read.c's main "handle" on a TU symtab.
842 To simplify things we create an artificial CU that "includes" all the
843 type units using this stmt_list so that the rest of the code still has
844 a "per_cu" handle on the symtab.
845 This PER_CU is recognized by having no section. */
846 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
847 struct dwarf2_per_cu_data per_cu
;
849 /* The TUs that share this DW_AT_stmt_list entry.
850 This is added to while parsing type units to build partial symtabs,
851 and is deleted afterwards and not used again. */
852 VEC (sig_type_ptr
) *tus
;
854 /* The compunit symtab.
855 Type units in a group needn't all be defined in the same source file,
856 so we create an essentially anonymous symtab as the compunit symtab. */
857 struct compunit_symtab
*compunit_symtab
;
859 /* The data used to construct the hash key. */
860 struct stmt_list_hash hash
;
862 /* The number of symtabs from the line header.
863 The value here must match line_header.num_file_names. */
864 unsigned int num_symtabs
;
866 /* The symbol tables for this TU (obtained from the files listed in
868 WARNING: The order of entries here must match the order of entries
869 in the line header. After the first TU using this type_unit_group, the
870 line header for the subsequent TUs is recreated from this. This is done
871 because we need to use the same symtabs for each TU using the same
872 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
873 there's no guarantee the line header doesn't have duplicate entries. */
874 struct symtab
**symtabs
;
877 /* These sections are what may appear in a (real or virtual) DWO file. */
881 struct dwarf2_section_info abbrev
;
882 struct dwarf2_section_info line
;
883 struct dwarf2_section_info loc
;
884 struct dwarf2_section_info loclists
;
885 struct dwarf2_section_info macinfo
;
886 struct dwarf2_section_info macro
;
887 struct dwarf2_section_info str
;
888 struct dwarf2_section_info str_offsets
;
889 /* In the case of a virtual DWO file, these two are unused. */
890 struct dwarf2_section_info info
;
891 VEC (dwarf2_section_info_def
) *types
;
894 /* CUs/TUs in DWP/DWO files. */
898 /* Backlink to the containing struct dwo_file. */
899 struct dwo_file
*dwo_file
;
901 /* The "id" that distinguishes this CU/TU.
902 .debug_info calls this "dwo_id", .debug_types calls this "signature".
903 Since signatures came first, we stick with it for consistency. */
906 /* The section this CU/TU lives in, in the DWO file. */
907 struct dwarf2_section_info
*section
;
909 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
910 sect_offset sect_off
;
913 /* For types, offset in the type's DIE of the type defined by this TU. */
914 cu_offset type_offset_in_tu
;
917 /* include/dwarf2.h defines the DWP section codes.
918 It defines a max value but it doesn't define a min value, which we
919 use for error checking, so provide one. */
921 enum dwp_v2_section_ids
926 /* Data for one DWO file.
928 This includes virtual DWO files (a virtual DWO file is a DWO file as it
929 appears in a DWP file). DWP files don't really have DWO files per se -
930 comdat folding of types "loses" the DWO file they came from, and from
931 a high level view DWP files appear to contain a mass of random types.
932 However, to maintain consistency with the non-DWP case we pretend DWP
933 files contain virtual DWO files, and we assign each TU with one virtual
934 DWO file (generally based on the line and abbrev section offsets -
935 a heuristic that seems to work in practice). */
939 /* The DW_AT_GNU_dwo_name attribute.
940 For virtual DWO files the name is constructed from the section offsets
941 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
942 from related CU+TUs. */
943 const char *dwo_name
;
945 /* The DW_AT_comp_dir attribute. */
946 const char *comp_dir
;
948 /* The bfd, when the file is open. Otherwise this is NULL.
949 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
952 /* The sections that make up this DWO file.
953 Remember that for virtual DWO files in DWP V2, these are virtual
954 sections (for lack of a better name). */
955 struct dwo_sections sections
;
957 /* The CUs in the file.
958 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
959 an extension to handle LLVM's Link Time Optimization output (where
960 multiple source files may be compiled into a single object/dwo pair). */
963 /* Table of TUs in the file.
964 Each element is a struct dwo_unit. */
968 /* These sections are what may appear in a DWP file. */
972 /* These are used by both DWP version 1 and 2. */
973 struct dwarf2_section_info str
;
974 struct dwarf2_section_info cu_index
;
975 struct dwarf2_section_info tu_index
;
977 /* These are only used by DWP version 2 files.
978 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
979 sections are referenced by section number, and are not recorded here.
980 In DWP version 2 there is at most one copy of all these sections, each
981 section being (effectively) comprised of the concatenation of all of the
982 individual sections that exist in the version 1 format.
983 To keep the code simple we treat each of these concatenated pieces as a
984 section itself (a virtual section?). */
985 struct dwarf2_section_info abbrev
;
986 struct dwarf2_section_info info
;
987 struct dwarf2_section_info line
;
988 struct dwarf2_section_info loc
;
989 struct dwarf2_section_info macinfo
;
990 struct dwarf2_section_info macro
;
991 struct dwarf2_section_info str_offsets
;
992 struct dwarf2_section_info types
;
995 /* These sections are what may appear in a virtual DWO file in DWP version 1.
996 A virtual DWO file is a DWO file as it appears in a DWP file. */
998 struct virtual_v1_dwo_sections
1000 struct dwarf2_section_info abbrev
;
1001 struct dwarf2_section_info line
;
1002 struct dwarf2_section_info loc
;
1003 struct dwarf2_section_info macinfo
;
1004 struct dwarf2_section_info macro
;
1005 struct dwarf2_section_info str_offsets
;
1006 /* Each DWP hash table entry records one CU or one TU.
1007 That is recorded here, and copied to dwo_unit.section. */
1008 struct dwarf2_section_info info_or_types
;
1011 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
1012 In version 2, the sections of the DWO files are concatenated together
1013 and stored in one section of that name. Thus each ELF section contains
1014 several "virtual" sections. */
1016 struct virtual_v2_dwo_sections
1018 bfd_size_type abbrev_offset
;
1019 bfd_size_type abbrev_size
;
1021 bfd_size_type line_offset
;
1022 bfd_size_type line_size
;
1024 bfd_size_type loc_offset
;
1025 bfd_size_type loc_size
;
1027 bfd_size_type macinfo_offset
;
1028 bfd_size_type macinfo_size
;
1030 bfd_size_type macro_offset
;
1031 bfd_size_type macro_size
;
1033 bfd_size_type str_offsets_offset
;
1034 bfd_size_type str_offsets_size
;
1036 /* Each DWP hash table entry records one CU or one TU.
1037 That is recorded here, and copied to dwo_unit.section. */
1038 bfd_size_type info_or_types_offset
;
1039 bfd_size_type info_or_types_size
;
1042 /* Contents of DWP hash tables. */
1044 struct dwp_hash_table
1046 uint32_t version
, nr_columns
;
1047 uint32_t nr_units
, nr_slots
;
1048 const gdb_byte
*hash_table
, *unit_table
;
1053 const gdb_byte
*indices
;
1057 /* This is indexed by column number and gives the id of the section
1059 #define MAX_NR_V2_DWO_SECTIONS \
1060 (1 /* .debug_info or .debug_types */ \
1061 + 1 /* .debug_abbrev */ \
1062 + 1 /* .debug_line */ \
1063 + 1 /* .debug_loc */ \
1064 + 1 /* .debug_str_offsets */ \
1065 + 1 /* .debug_macro or .debug_macinfo */)
1066 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
1067 const gdb_byte
*offsets
;
1068 const gdb_byte
*sizes
;
1073 /* Data for one DWP file. */
1077 /* Name of the file. */
1080 /* File format version. */
1086 /* Section info for this file. */
1087 struct dwp_sections sections
;
1089 /* Table of CUs in the file. */
1090 const struct dwp_hash_table
*cus
;
1092 /* Table of TUs in the file. */
1093 const struct dwp_hash_table
*tus
;
1095 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
1099 /* Table to map ELF section numbers to their sections.
1100 This is only needed for the DWP V1 file format. */
1101 unsigned int num_sections
;
1102 asection
**elf_sections
;
1105 /* This represents a '.dwz' file. */
1109 /* A dwz file can only contain a few sections. */
1110 struct dwarf2_section_info abbrev
;
1111 struct dwarf2_section_info info
;
1112 struct dwarf2_section_info str
;
1113 struct dwarf2_section_info line
;
1114 struct dwarf2_section_info macro
;
1115 struct dwarf2_section_info gdb_index
;
1117 /* The dwz's BFD. */
1121 /* Struct used to pass misc. parameters to read_die_and_children, et
1122 al. which are used for both .debug_info and .debug_types dies.
1123 All parameters here are unchanging for the life of the call. This
1124 struct exists to abstract away the constant parameters of die reading. */
1126 struct die_reader_specs
1128 /* The bfd of die_section. */
1131 /* The CU of the DIE we are parsing. */
1132 struct dwarf2_cu
*cu
;
1134 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1135 struct dwo_file
*dwo_file
;
1137 /* The section the die comes from.
1138 This is either .debug_info or .debug_types, or the .dwo variants. */
1139 struct dwarf2_section_info
*die_section
;
1141 /* die_section->buffer. */
1142 const gdb_byte
*buffer
;
1144 /* The end of the buffer. */
1145 const gdb_byte
*buffer_end
;
1147 /* The value of the DW_AT_comp_dir attribute. */
1148 const char *comp_dir
;
1151 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1152 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1153 const gdb_byte
*info_ptr
,
1154 struct die_info
*comp_unit_die
,
1158 /* A 1-based directory index. This is a strong typedef to prevent
1159 accidentally using a directory index as a 0-based index into an
1161 enum class dir_index
: unsigned int {};
1163 /* Likewise, a 1-based file name index. */
1164 enum class file_name_index
: unsigned int {};
1168 file_entry () = default;
1170 file_entry (const char *name_
, dir_index d_index_
,
1171 unsigned int mod_time_
, unsigned int length_
)
1174 mod_time (mod_time_
),
1178 /* Return the include directory at D_INDEX stored in LH. Returns
1179 NULL if D_INDEX is out of bounds. */
1180 const char *include_dir (const line_header
*lh
) const;
1182 /* The file name. Note this is an observing pointer. The memory is
1183 owned by debug_line_buffer. */
1184 const char *name
{};
1186 /* The directory index (1-based). */
1187 dir_index d_index
{};
1189 unsigned int mod_time
{};
1191 unsigned int length
{};
1193 /* True if referenced by the Line Number Program. */
1196 /* The associated symbol table, if any. */
1197 struct symtab
*symtab
{};
1200 /* The line number information for a compilation unit (found in the
1201 .debug_line section) begins with a "statement program header",
1202 which contains the following information. */
1209 /* Add an entry to the include directory table. */
1210 void add_include_dir (const char *include_dir
);
1212 /* Add an entry to the file name table. */
1213 void add_file_name (const char *name
, dir_index d_index
,
1214 unsigned int mod_time
, unsigned int length
);
1216 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1217 is out of bounds. */
1218 const char *include_dir_at (dir_index index
) const
1220 /* Convert directory index number (1-based) to vector index
1222 size_t vec_index
= to_underlying (index
) - 1;
1224 if (vec_index
>= include_dirs
.size ())
1226 return include_dirs
[vec_index
];
1229 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1230 is out of bounds. */
1231 file_entry
*file_name_at (file_name_index index
)
1233 /* Convert file name index number (1-based) to vector index
1235 size_t vec_index
= to_underlying (index
) - 1;
1237 if (vec_index
>= file_names
.size ())
1239 return &file_names
[vec_index
];
1242 /* Const version of the above. */
1243 const file_entry
*file_name_at (unsigned int index
) const
1245 if (index
>= file_names
.size ())
1247 return &file_names
[index
];
1250 /* Offset of line number information in .debug_line section. */
1251 sect_offset sect_off
{};
1253 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1254 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1256 unsigned int total_length
{};
1257 unsigned short version
{};
1258 unsigned int header_length
{};
1259 unsigned char minimum_instruction_length
{};
1260 unsigned char maximum_ops_per_instruction
{};
1261 unsigned char default_is_stmt
{};
1263 unsigned char line_range
{};
1264 unsigned char opcode_base
{};
1266 /* standard_opcode_lengths[i] is the number of operands for the
1267 standard opcode whose value is i. This means that
1268 standard_opcode_lengths[0] is unused, and the last meaningful
1269 element is standard_opcode_lengths[opcode_base - 1]. */
1270 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1272 /* The include_directories table. Note these are observing
1273 pointers. The memory is owned by debug_line_buffer. */
1274 std::vector
<const char *> include_dirs
;
1276 /* The file_names table. */
1277 std::vector
<file_entry
> file_names
;
1279 /* The start and end of the statement program following this
1280 header. These point into dwarf2_per_objfile->line_buffer. */
1281 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1284 typedef std::unique_ptr
<line_header
> line_header_up
;
1287 file_entry::include_dir (const line_header
*lh
) const
1289 return lh
->include_dir_at (d_index
);
1292 /* When we construct a partial symbol table entry we only
1293 need this much information. */
1294 struct partial_die_info
1296 /* Offset of this DIE. */
1297 sect_offset sect_off
;
1299 /* DWARF-2 tag for this DIE. */
1300 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1302 /* Assorted flags describing the data found in this DIE. */
1303 unsigned int has_children
: 1;
1304 unsigned int is_external
: 1;
1305 unsigned int is_declaration
: 1;
1306 unsigned int has_type
: 1;
1307 unsigned int has_specification
: 1;
1308 unsigned int has_pc_info
: 1;
1309 unsigned int may_be_inlined
: 1;
1311 /* This DIE has been marked DW_AT_main_subprogram. */
1312 unsigned int main_subprogram
: 1;
1314 /* Flag set if the SCOPE field of this structure has been
1316 unsigned int scope_set
: 1;
1318 /* Flag set if the DIE has a byte_size attribute. */
1319 unsigned int has_byte_size
: 1;
1321 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1322 unsigned int has_const_value
: 1;
1324 /* Flag set if any of the DIE's children are template arguments. */
1325 unsigned int has_template_arguments
: 1;
1327 /* Flag set if fixup_partial_die has been called on this die. */
1328 unsigned int fixup_called
: 1;
1330 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1331 unsigned int is_dwz
: 1;
1333 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1334 unsigned int spec_is_dwz
: 1;
1336 /* The name of this DIE. Normally the value of DW_AT_name, but
1337 sometimes a default name for unnamed DIEs. */
1340 /* The linkage name, if present. */
1341 const char *linkage_name
;
1343 /* The scope to prepend to our children. This is generally
1344 allocated on the comp_unit_obstack, so will disappear
1345 when this compilation unit leaves the cache. */
1348 /* Some data associated with the partial DIE. The tag determines
1349 which field is live. */
1352 /* The location description associated with this DIE, if any. */
1353 struct dwarf_block
*locdesc
;
1354 /* The offset of an import, for DW_TAG_imported_unit. */
1355 sect_offset sect_off
;
1358 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1362 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1363 DW_AT_sibling, if any. */
1364 /* NOTE: This member isn't strictly necessary, read_partial_die could
1365 return DW_AT_sibling values to its caller load_partial_dies. */
1366 const gdb_byte
*sibling
;
1368 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1369 DW_AT_specification (or DW_AT_abstract_origin or
1370 DW_AT_extension). */
1371 sect_offset spec_offset
;
1373 /* Pointers to this DIE's parent, first child, and next sibling,
1375 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1378 /* This data structure holds the information of an abbrev. */
1381 unsigned int number
; /* number identifying abbrev */
1382 enum dwarf_tag tag
; /* dwarf tag */
1383 unsigned short has_children
; /* boolean */
1384 unsigned short num_attrs
; /* number of attributes */
1385 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1386 struct abbrev_info
*next
; /* next in chain */
1391 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1392 ENUM_BITFIELD(dwarf_form
) form
: 16;
1394 /* It is valid only if FORM is DW_FORM_implicit_const. */
1395 LONGEST implicit_const
;
1398 /* Size of abbrev_table.abbrev_hash_table. */
1399 #define ABBREV_HASH_SIZE 121
1401 /* Top level data structure to contain an abbreviation table. */
1405 /* Where the abbrev table came from.
1406 This is used as a sanity check when the table is used. */
1407 sect_offset sect_off
;
1409 /* Storage for the abbrev table. */
1410 struct obstack abbrev_obstack
;
1412 /* Hash table of abbrevs.
1413 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1414 It could be statically allocated, but the previous code didn't so we
1416 struct abbrev_info
**abbrevs
;
1419 /* Attributes have a name and a value. */
1422 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1423 ENUM_BITFIELD(dwarf_form
) form
: 15;
1425 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1426 field should be in u.str (existing only for DW_STRING) but it is kept
1427 here for better struct attribute alignment. */
1428 unsigned int string_is_canonical
: 1;
1433 struct dwarf_block
*blk
;
1442 /* This data structure holds a complete die structure. */
1445 /* DWARF-2 tag for this DIE. */
1446 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1448 /* Number of attributes */
1449 unsigned char num_attrs
;
1451 /* True if we're presently building the full type name for the
1452 type derived from this DIE. */
1453 unsigned char building_fullname
: 1;
1455 /* True if this die is in process. PR 16581. */
1456 unsigned char in_process
: 1;
1459 unsigned int abbrev
;
1461 /* Offset in .debug_info or .debug_types section. */
1462 sect_offset sect_off
;
1464 /* The dies in a compilation unit form an n-ary tree. PARENT
1465 points to this die's parent; CHILD points to the first child of
1466 this node; and all the children of a given node are chained
1467 together via their SIBLING fields. */
1468 struct die_info
*child
; /* Its first child, if any. */
1469 struct die_info
*sibling
; /* Its next sibling, if any. */
1470 struct die_info
*parent
; /* Its parent, if any. */
1472 /* An array of attributes, with NUM_ATTRS elements. There may be
1473 zero, but it's not common and zero-sized arrays are not
1474 sufficiently portable C. */
1475 struct attribute attrs
[1];
1478 /* Get at parts of an attribute structure. */
1480 #define DW_STRING(attr) ((attr)->u.str)
1481 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1482 #define DW_UNSND(attr) ((attr)->u.unsnd)
1483 #define DW_BLOCK(attr) ((attr)->u.blk)
1484 #define DW_SND(attr) ((attr)->u.snd)
1485 #define DW_ADDR(attr) ((attr)->u.addr)
1486 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1488 /* Blocks are a bunch of untyped bytes. */
1493 /* Valid only if SIZE is not zero. */
1494 const gdb_byte
*data
;
1497 #ifndef ATTR_ALLOC_CHUNK
1498 #define ATTR_ALLOC_CHUNK 4
1501 /* Allocate fields for structs, unions and enums in this size. */
1502 #ifndef DW_FIELD_ALLOC_CHUNK
1503 #define DW_FIELD_ALLOC_CHUNK 4
1506 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1507 but this would require a corresponding change in unpack_field_as_long
1509 static int bits_per_byte
= 8;
1513 struct nextfield
*next
;
1521 struct nextfnfield
*next
;
1522 struct fn_field fnfield
;
1529 struct nextfnfield
*head
;
1532 struct typedef_field_list
1534 struct typedef_field field
;
1535 struct typedef_field_list
*next
;
1538 /* The routines that read and process dies for a C struct or C++ class
1539 pass lists of data member fields and lists of member function fields
1540 in an instance of a field_info structure, as defined below. */
1543 /* List of data member and baseclasses fields. */
1544 struct nextfield
*fields
, *baseclasses
;
1546 /* Number of fields (including baseclasses). */
1549 /* Number of baseclasses. */
1552 /* Set if the accesibility of one of the fields is not public. */
1553 int non_public_fields
;
1555 /* Member function fieldlist array, contains name of possibly overloaded
1556 member function, number of overloaded member functions and a pointer
1557 to the head of the member function field chain. */
1558 struct fnfieldlist
*fnfieldlists
;
1560 /* Number of entries in the fnfieldlists array. */
1563 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1564 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1565 struct typedef_field_list
*typedef_field_list
;
1566 unsigned typedef_field_list_count
;
1569 /* One item on the queue of compilation units to read in full symbols
1571 struct dwarf2_queue_item
1573 struct dwarf2_per_cu_data
*per_cu
;
1574 enum language pretend_language
;
1575 struct dwarf2_queue_item
*next
;
1578 /* The current queue. */
1579 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1581 /* Loaded secondary compilation units are kept in memory until they
1582 have not been referenced for the processing of this many
1583 compilation units. Set this to zero to disable caching. Cache
1584 sizes of up to at least twenty will improve startup time for
1585 typical inter-CU-reference binaries, at an obvious memory cost. */
1586 static int dwarf_max_cache_age
= 5;
1588 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1589 struct cmd_list_element
*c
, const char *value
)
1591 fprintf_filtered (file
, _("The upper bound on the age of cached "
1592 "DWARF compilation units is %s.\n"),
1596 /* local function prototypes */
1598 static const char *get_section_name (const struct dwarf2_section_info
*);
1600 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1602 static void dwarf2_find_base_address (struct die_info
*die
,
1603 struct dwarf2_cu
*cu
);
1605 static struct partial_symtab
*create_partial_symtab
1606 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1608 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1609 const gdb_byte
*info_ptr
,
1610 struct die_info
*type_unit_die
,
1611 int has_children
, void *data
);
1613 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1615 static void scan_partial_symbols (struct partial_die_info
*,
1616 CORE_ADDR
*, CORE_ADDR
*,
1617 int, struct dwarf2_cu
*);
1619 static void add_partial_symbol (struct partial_die_info
*,
1620 struct dwarf2_cu
*);
1622 static void add_partial_namespace (struct partial_die_info
*pdi
,
1623 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1624 int set_addrmap
, struct dwarf2_cu
*cu
);
1626 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1627 CORE_ADDR
*highpc
, int set_addrmap
,
1628 struct dwarf2_cu
*cu
);
1630 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1631 struct dwarf2_cu
*cu
);
1633 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1634 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1635 int need_pc
, struct dwarf2_cu
*cu
);
1637 static void dwarf2_read_symtab (struct partial_symtab
*,
1640 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1642 static struct abbrev_info
*abbrev_table_lookup_abbrev
1643 (const struct abbrev_table
*, unsigned int);
1645 static struct abbrev_table
*abbrev_table_read_table
1646 (struct dwarf2_section_info
*, sect_offset
);
1648 static void abbrev_table_free (struct abbrev_table
*);
1650 static void abbrev_table_free_cleanup (void *);
1652 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1653 struct dwarf2_section_info
*);
1655 static void dwarf2_free_abbrev_table (void *);
1657 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1659 static struct partial_die_info
*load_partial_dies
1660 (const struct die_reader_specs
*, const gdb_byte
*, int);
1662 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1663 struct partial_die_info
*,
1664 struct abbrev_info
*,
1668 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1669 struct dwarf2_cu
*);
1671 static void fixup_partial_die (struct partial_die_info
*,
1672 struct dwarf2_cu
*);
1674 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1675 struct attribute
*, struct attr_abbrev
*,
1678 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1680 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1682 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1684 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1686 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1688 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1691 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1693 static LONGEST read_checked_initial_length_and_offset
1694 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1695 unsigned int *, unsigned int *);
1697 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1698 const struct comp_unit_head
*,
1701 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1703 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1706 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1708 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1710 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1711 const struct comp_unit_head
*,
1714 static const char *read_indirect_line_string (bfd
*, const gdb_byte
*,
1715 const struct comp_unit_head
*,
1718 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1720 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1722 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1726 static const char *read_str_index (const struct die_reader_specs
*reader
,
1727 ULONGEST str_index
);
1729 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1731 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1732 struct dwarf2_cu
*);
1734 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1737 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1738 struct dwarf2_cu
*cu
);
1740 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1741 struct dwarf2_cu
*cu
);
1743 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1745 static struct die_info
*die_specification (struct die_info
*die
,
1746 struct dwarf2_cu
**);
1748 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1749 struct dwarf2_cu
*cu
);
1751 static void dwarf_decode_lines (struct line_header
*, const char *,
1752 struct dwarf2_cu
*, struct partial_symtab
*,
1753 CORE_ADDR
, int decode_mapping
);
1755 static void dwarf2_start_subfile (const char *, const char *);
1757 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1758 const char *, const char *,
1761 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1762 struct dwarf2_cu
*);
1764 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1765 struct dwarf2_cu
*, struct symbol
*);
1767 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1768 struct dwarf2_cu
*);
1770 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1773 struct obstack
*obstack
,
1774 struct dwarf2_cu
*cu
, LONGEST
*value
,
1775 const gdb_byte
**bytes
,
1776 struct dwarf2_locexpr_baton
**baton
);
1778 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1780 static int need_gnat_info (struct dwarf2_cu
*);
1782 static struct type
*die_descriptive_type (struct die_info
*,
1783 struct dwarf2_cu
*);
1785 static void set_descriptive_type (struct type
*, struct die_info
*,
1786 struct dwarf2_cu
*);
1788 static struct type
*die_containing_type (struct die_info
*,
1789 struct dwarf2_cu
*);
1791 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1792 struct dwarf2_cu
*);
1794 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1796 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1798 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1800 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1801 const char *suffix
, int physname
,
1802 struct dwarf2_cu
*cu
);
1804 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1806 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1808 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1810 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1812 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1814 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1816 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1817 struct dwarf2_cu
*, struct partial_symtab
*);
1819 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1820 values. Keep the items ordered with increasing constraints compliance. */
1823 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1824 PC_BOUNDS_NOT_PRESENT
,
1826 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1827 were present but they do not form a valid range of PC addresses. */
1830 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1833 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1837 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1838 CORE_ADDR
*, CORE_ADDR
*,
1840 struct partial_symtab
*);
1842 static void get_scope_pc_bounds (struct die_info
*,
1843 CORE_ADDR
*, CORE_ADDR
*,
1844 struct dwarf2_cu
*);
1846 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1847 CORE_ADDR
, struct dwarf2_cu
*);
1849 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1850 struct dwarf2_cu
*);
1852 static void dwarf2_attach_fields_to_type (struct field_info
*,
1853 struct type
*, struct dwarf2_cu
*);
1855 static void dwarf2_add_member_fn (struct field_info
*,
1856 struct die_info
*, struct type
*,
1857 struct dwarf2_cu
*);
1859 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1861 struct dwarf2_cu
*);
1863 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1865 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1867 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1869 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1871 static struct using_direct
**using_directives (enum language
);
1873 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1875 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1877 static struct type
*read_module_type (struct die_info
*die
,
1878 struct dwarf2_cu
*cu
);
1880 static const char *namespace_name (struct die_info
*die
,
1881 int *is_anonymous
, struct dwarf2_cu
*);
1883 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1885 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1887 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1888 struct dwarf2_cu
*);
1890 static struct die_info
*read_die_and_siblings_1
1891 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1894 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1895 const gdb_byte
*info_ptr
,
1896 const gdb_byte
**new_info_ptr
,
1897 struct die_info
*parent
);
1899 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1900 struct die_info
**, const gdb_byte
*,
1903 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1904 struct die_info
**, const gdb_byte
*,
1907 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1909 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1912 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1914 static const char *dwarf2_full_name (const char *name
,
1915 struct die_info
*die
,
1916 struct dwarf2_cu
*cu
);
1918 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1919 struct dwarf2_cu
*cu
);
1921 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1922 struct dwarf2_cu
**);
1924 static const char *dwarf_tag_name (unsigned int);
1926 static const char *dwarf_attr_name (unsigned int);
1928 static const char *dwarf_form_name (unsigned int);
1930 static const char *dwarf_bool_name (unsigned int);
1932 static const char *dwarf_type_encoding_name (unsigned int);
1934 static struct die_info
*sibling_die (struct die_info
*);
1936 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1938 static void dump_die_for_error (struct die_info
*);
1940 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1943 /*static*/ void dump_die (struct die_info
*, int max_level
);
1945 static void store_in_ref_table (struct die_info
*,
1946 struct dwarf2_cu
*);
1948 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1950 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1952 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1953 const struct attribute
*,
1954 struct dwarf2_cu
**);
1956 static struct die_info
*follow_die_ref (struct die_info
*,
1957 const struct attribute
*,
1958 struct dwarf2_cu
**);
1960 static struct die_info
*follow_die_sig (struct die_info
*,
1961 const struct attribute
*,
1962 struct dwarf2_cu
**);
1964 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1965 struct dwarf2_cu
*);
1967 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1968 const struct attribute
*,
1969 struct dwarf2_cu
*);
1971 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1973 static void read_signatured_type (struct signatured_type
*);
1975 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1976 struct die_info
*die
, struct dwarf2_cu
*cu
,
1977 struct dynamic_prop
*prop
);
1979 /* memory allocation interface */
1981 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1983 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1985 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1987 static int attr_form_is_block (const struct attribute
*);
1989 static int attr_form_is_section_offset (const struct attribute
*);
1991 static int attr_form_is_constant (const struct attribute
*);
1993 static int attr_form_is_ref (const struct attribute
*);
1995 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1996 struct dwarf2_loclist_baton
*baton
,
1997 const struct attribute
*attr
);
1999 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
2001 struct dwarf2_cu
*cu
,
2004 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
2005 const gdb_byte
*info_ptr
,
2006 struct abbrev_info
*abbrev
);
2008 static void free_stack_comp_unit (void *);
2010 static hashval_t
partial_die_hash (const void *item
);
2012 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
2014 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
2015 (sect_offset sect_off
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
2017 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
2018 struct dwarf2_per_cu_data
*per_cu
);
2020 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
2021 struct die_info
*comp_unit_die
,
2022 enum language pretend_language
);
2024 static void free_heap_comp_unit (void *);
2026 static void free_cached_comp_units (void *);
2028 static void age_cached_comp_units (void);
2030 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
2032 static struct type
*set_die_type (struct die_info
*, struct type
*,
2033 struct dwarf2_cu
*);
2035 static void create_all_comp_units (struct objfile
*);
2037 static int create_all_type_units (struct objfile
*);
2039 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
2042 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
2045 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
2048 static void dwarf2_add_dependence (struct dwarf2_cu
*,
2049 struct dwarf2_per_cu_data
*);
2051 static void dwarf2_mark (struct dwarf2_cu
*);
2053 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
2055 static struct type
*get_die_type_at_offset (sect_offset
,
2056 struct dwarf2_per_cu_data
*);
2058 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
2060 static void dwarf2_release_queue (void *dummy
);
2062 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
2063 enum language pretend_language
);
2065 static void process_queue (void);
2067 /* The return type of find_file_and_directory. Note, the enclosed
2068 string pointers are only valid while this object is valid. */
2070 struct file_and_directory
2072 /* The filename. This is never NULL. */
2075 /* The compilation directory. NULL if not known. If we needed to
2076 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
2077 points directly to the DW_AT_comp_dir string attribute owned by
2078 the obstack that owns the DIE. */
2079 const char *comp_dir
;
2081 /* If we needed to build a new string for comp_dir, this is what
2082 owns the storage. */
2083 std::string comp_dir_storage
;
2086 static file_and_directory
find_file_and_directory (struct die_info
*die
,
2087 struct dwarf2_cu
*cu
);
2089 static char *file_full_name (int file
, struct line_header
*lh
,
2090 const char *comp_dir
);
2092 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
2093 enum class rcuh_kind
{ COMPILE
, TYPE
};
2095 static const gdb_byte
*read_and_check_comp_unit_head
2096 (struct comp_unit_head
*header
,
2097 struct dwarf2_section_info
*section
,
2098 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
2099 rcuh_kind section_kind
);
2101 static void init_cutu_and_read_dies
2102 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
2103 int use_existing_cu
, int keep
,
2104 die_reader_func_ftype
*die_reader_func
, void *data
);
2106 static void init_cutu_and_read_dies_simple
2107 (struct dwarf2_per_cu_data
*this_cu
,
2108 die_reader_func_ftype
*die_reader_func
, void *data
);
2110 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
2112 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
2114 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2115 (struct dwp_file
*dwp_file
, const char *comp_dir
,
2116 ULONGEST signature
, int is_debug_types
);
2118 static struct dwp_file
*get_dwp_file (void);
2120 static struct dwo_unit
*lookup_dwo_comp_unit
2121 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2123 static struct dwo_unit
*lookup_dwo_type_unit
2124 (struct signatured_type
*, const char *, const char *);
2126 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2128 static void free_dwo_file_cleanup (void *);
2130 static void process_cu_includes (void);
2132 static void check_producer (struct dwarf2_cu
*cu
);
2134 static void free_line_header_voidp (void *arg
);
2136 /* Various complaints about symbol reading that don't abort the process. */
2139 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2141 complaint (&symfile_complaints
,
2142 _("statement list doesn't fit in .debug_line section"));
2146 dwarf2_debug_line_missing_file_complaint (void)
2148 complaint (&symfile_complaints
,
2149 _(".debug_line section has line data without a file"));
2153 dwarf2_debug_line_missing_end_sequence_complaint (void)
2155 complaint (&symfile_complaints
,
2156 _(".debug_line section has line "
2157 "program sequence without an end"));
2161 dwarf2_complex_location_expr_complaint (void)
2163 complaint (&symfile_complaints
, _("location expression too complex"));
2167 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2170 complaint (&symfile_complaints
,
2171 _("const value length mismatch for '%s', got %d, expected %d"),
2176 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2178 complaint (&symfile_complaints
,
2179 _("debug info runs off end of %s section"
2181 get_section_name (section
),
2182 get_section_file_name (section
));
2186 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2188 complaint (&symfile_complaints
,
2189 _("macro debug info contains a "
2190 "malformed macro definition:\n`%s'"),
2195 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2197 complaint (&symfile_complaints
,
2198 _("invalid attribute class or form for '%s' in '%s'"),
2202 /* Hash function for line_header_hash. */
2205 line_header_hash (const struct line_header
*ofs
)
2207 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2210 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2213 line_header_hash_voidp (const void *item
)
2215 const struct line_header
*ofs
= (const struct line_header
*) item
;
2217 return line_header_hash (ofs
);
2220 /* Equality function for line_header_hash. */
2223 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2225 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2226 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2228 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2229 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2234 /* Read the given attribute value as an address, taking the attribute's
2235 form into account. */
2238 attr_value_as_address (struct attribute
*attr
)
2242 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2244 /* Aside from a few clearly defined exceptions, attributes that
2245 contain an address must always be in DW_FORM_addr form.
2246 Unfortunately, some compilers happen to be violating this
2247 requirement by encoding addresses using other forms, such
2248 as DW_FORM_data4 for example. For those broken compilers,
2249 we try to do our best, without any guarantee of success,
2250 to interpret the address correctly. It would also be nice
2251 to generate a complaint, but that would require us to maintain
2252 a list of legitimate cases where a non-address form is allowed,
2253 as well as update callers to pass in at least the CU's DWARF
2254 version. This is more overhead than what we're willing to
2255 expand for a pretty rare case. */
2256 addr
= DW_UNSND (attr
);
2259 addr
= DW_ADDR (attr
);
2264 /* The suffix for an index file. */
2265 #define INDEX_SUFFIX ".gdb-index"
2267 /* See declaration. */
2269 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2270 const dwarf2_debug_sections
*names
)
2271 : objfile (objfile_
)
2274 names
= &dwarf2_elf_names
;
2276 bfd
*obfd
= objfile
->obfd
;
2278 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2279 locate_sections (obfd
, sec
, *names
);
2282 dwarf2_per_objfile::~dwarf2_per_objfile ()
2284 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2285 free_cached_comp_units ();
2287 if (quick_file_names_table
)
2288 htab_delete (quick_file_names_table
);
2290 if (line_header_hash
)
2291 htab_delete (line_header_hash
);
2293 /* Everything else should be on the objfile obstack. */
2296 /* See declaration. */
2299 dwarf2_per_objfile::free_cached_comp_units ()
2301 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2302 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2303 while (per_cu
!= NULL
)
2305 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2307 free_heap_comp_unit (per_cu
->cu
);
2308 *last_chain
= next_cu
;
2313 /* Try to locate the sections we need for DWARF 2 debugging
2314 information and return true if we have enough to do something.
2315 NAMES points to the dwarf2 section names, or is NULL if the standard
2316 ELF names are used. */
2319 dwarf2_has_info (struct objfile
*objfile
,
2320 const struct dwarf2_debug_sections
*names
)
2322 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2323 objfile_data (objfile
, dwarf2_objfile_data_key
));
2324 if (!dwarf2_per_objfile
)
2326 /* Initialize per-objfile state. */
2327 struct dwarf2_per_objfile
*data
2328 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2330 dwarf2_per_objfile
= new (data
) struct dwarf2_per_objfile (objfile
, names
);
2331 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
2333 return (!dwarf2_per_objfile
->info
.is_virtual
2334 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2335 && !dwarf2_per_objfile
->abbrev
.is_virtual
2336 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2339 /* Return the containing section of virtual section SECTION. */
2341 static struct dwarf2_section_info
*
2342 get_containing_section (const struct dwarf2_section_info
*section
)
2344 gdb_assert (section
->is_virtual
);
2345 return section
->s
.containing_section
;
2348 /* Return the bfd owner of SECTION. */
2351 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2353 if (section
->is_virtual
)
2355 section
= get_containing_section (section
);
2356 gdb_assert (!section
->is_virtual
);
2358 return section
->s
.section
->owner
;
2361 /* Return the bfd section of SECTION.
2362 Returns NULL if the section is not present. */
2365 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2367 if (section
->is_virtual
)
2369 section
= get_containing_section (section
);
2370 gdb_assert (!section
->is_virtual
);
2372 return section
->s
.section
;
2375 /* Return the name of SECTION. */
2378 get_section_name (const struct dwarf2_section_info
*section
)
2380 asection
*sectp
= get_section_bfd_section (section
);
2382 gdb_assert (sectp
!= NULL
);
2383 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2386 /* Return the name of the file SECTION is in. */
2389 get_section_file_name (const struct dwarf2_section_info
*section
)
2391 bfd
*abfd
= get_section_bfd_owner (section
);
2393 return bfd_get_filename (abfd
);
2396 /* Return the id of SECTION.
2397 Returns 0 if SECTION doesn't exist. */
2400 get_section_id (const struct dwarf2_section_info
*section
)
2402 asection
*sectp
= get_section_bfd_section (section
);
2409 /* Return the flags of SECTION.
2410 SECTION (or containing section if this is a virtual section) must exist. */
2413 get_section_flags (const struct dwarf2_section_info
*section
)
2415 asection
*sectp
= get_section_bfd_section (section
);
2417 gdb_assert (sectp
!= NULL
);
2418 return bfd_get_section_flags (sectp
->owner
, sectp
);
2421 /* When loading sections, we look either for uncompressed section or for
2422 compressed section names. */
2425 section_is_p (const char *section_name
,
2426 const struct dwarf2_section_names
*names
)
2428 if (names
->normal
!= NULL
2429 && strcmp (section_name
, names
->normal
) == 0)
2431 if (names
->compressed
!= NULL
2432 && strcmp (section_name
, names
->compressed
) == 0)
2437 /* See declaration. */
2440 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2441 const dwarf2_debug_sections
&names
)
2443 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2445 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2448 else if (section_is_p (sectp
->name
, &names
.info
))
2450 this->info
.s
.section
= sectp
;
2451 this->info
.size
= bfd_get_section_size (sectp
);
2453 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2455 this->abbrev
.s
.section
= sectp
;
2456 this->abbrev
.size
= bfd_get_section_size (sectp
);
2458 else if (section_is_p (sectp
->name
, &names
.line
))
2460 this->line
.s
.section
= sectp
;
2461 this->line
.size
= bfd_get_section_size (sectp
);
2463 else if (section_is_p (sectp
->name
, &names
.loc
))
2465 this->loc
.s
.section
= sectp
;
2466 this->loc
.size
= bfd_get_section_size (sectp
);
2468 else if (section_is_p (sectp
->name
, &names
.loclists
))
2470 this->loclists
.s
.section
= sectp
;
2471 this->loclists
.size
= bfd_get_section_size (sectp
);
2473 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2475 this->macinfo
.s
.section
= sectp
;
2476 this->macinfo
.size
= bfd_get_section_size (sectp
);
2478 else if (section_is_p (sectp
->name
, &names
.macro
))
2480 this->macro
.s
.section
= sectp
;
2481 this->macro
.size
= bfd_get_section_size (sectp
);
2483 else if (section_is_p (sectp
->name
, &names
.str
))
2485 this->str
.s
.section
= sectp
;
2486 this->str
.size
= bfd_get_section_size (sectp
);
2488 else if (section_is_p (sectp
->name
, &names
.line_str
))
2490 this->line_str
.s
.section
= sectp
;
2491 this->line_str
.size
= bfd_get_section_size (sectp
);
2493 else if (section_is_p (sectp
->name
, &names
.addr
))
2495 this->addr
.s
.section
= sectp
;
2496 this->addr
.size
= bfd_get_section_size (sectp
);
2498 else if (section_is_p (sectp
->name
, &names
.frame
))
2500 this->frame
.s
.section
= sectp
;
2501 this->frame
.size
= bfd_get_section_size (sectp
);
2503 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2505 this->eh_frame
.s
.section
= sectp
;
2506 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2508 else if (section_is_p (sectp
->name
, &names
.ranges
))
2510 this->ranges
.s
.section
= sectp
;
2511 this->ranges
.size
= bfd_get_section_size (sectp
);
2513 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2515 this->rnglists
.s
.section
= sectp
;
2516 this->rnglists
.size
= bfd_get_section_size (sectp
);
2518 else if (section_is_p (sectp
->name
, &names
.types
))
2520 struct dwarf2_section_info type_section
;
2522 memset (&type_section
, 0, sizeof (type_section
));
2523 type_section
.s
.section
= sectp
;
2524 type_section
.size
= bfd_get_section_size (sectp
);
2526 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2529 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2531 this->gdb_index
.s
.section
= sectp
;
2532 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2535 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2536 && bfd_section_vma (abfd
, sectp
) == 0)
2537 this->has_section_at_zero
= true;
2540 /* A helper function that decides whether a section is empty,
2544 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2546 if (section
->is_virtual
)
2547 return section
->size
== 0;
2548 return section
->s
.section
== NULL
|| section
->size
== 0;
2551 /* Read the contents of the section INFO.
2552 OBJFILE is the main object file, but not necessarily the file where
2553 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2555 If the section is compressed, uncompress it before returning. */
2558 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2562 gdb_byte
*buf
, *retbuf
;
2566 info
->buffer
= NULL
;
2569 if (dwarf2_section_empty_p (info
))
2572 sectp
= get_section_bfd_section (info
);
2574 /* If this is a virtual section we need to read in the real one first. */
2575 if (info
->is_virtual
)
2577 struct dwarf2_section_info
*containing_section
=
2578 get_containing_section (info
);
2580 gdb_assert (sectp
!= NULL
);
2581 if ((sectp
->flags
& SEC_RELOC
) != 0)
2583 error (_("Dwarf Error: DWP format V2 with relocations is not"
2584 " supported in section %s [in module %s]"),
2585 get_section_name (info
), get_section_file_name (info
));
2587 dwarf2_read_section (objfile
, containing_section
);
2588 /* Other code should have already caught virtual sections that don't
2590 gdb_assert (info
->virtual_offset
+ info
->size
2591 <= containing_section
->size
);
2592 /* If the real section is empty or there was a problem reading the
2593 section we shouldn't get here. */
2594 gdb_assert (containing_section
->buffer
!= NULL
);
2595 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2599 /* If the section has relocations, we must read it ourselves.
2600 Otherwise we attach it to the BFD. */
2601 if ((sectp
->flags
& SEC_RELOC
) == 0)
2603 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2607 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2610 /* When debugging .o files, we may need to apply relocations; see
2611 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2612 We never compress sections in .o files, so we only need to
2613 try this when the section is not compressed. */
2614 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2617 info
->buffer
= retbuf
;
2621 abfd
= get_section_bfd_owner (info
);
2622 gdb_assert (abfd
!= NULL
);
2624 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2625 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2627 error (_("Dwarf Error: Can't read DWARF data"
2628 " in section %s [in module %s]"),
2629 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2633 /* A helper function that returns the size of a section in a safe way.
2634 If you are positive that the section has been read before using the
2635 size, then it is safe to refer to the dwarf2_section_info object's
2636 "size" field directly. In other cases, you must call this
2637 function, because for compressed sections the size field is not set
2638 correctly until the section has been read. */
2640 static bfd_size_type
2641 dwarf2_section_size (struct objfile
*objfile
,
2642 struct dwarf2_section_info
*info
)
2645 dwarf2_read_section (objfile
, info
);
2649 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2653 dwarf2_get_section_info (struct objfile
*objfile
,
2654 enum dwarf2_section_enum sect
,
2655 asection
**sectp
, const gdb_byte
**bufp
,
2656 bfd_size_type
*sizep
)
2658 struct dwarf2_per_objfile
*data
2659 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2660 dwarf2_objfile_data_key
);
2661 struct dwarf2_section_info
*info
;
2663 /* We may see an objfile without any DWARF, in which case we just
2674 case DWARF2_DEBUG_FRAME
:
2675 info
= &data
->frame
;
2677 case DWARF2_EH_FRAME
:
2678 info
= &data
->eh_frame
;
2681 gdb_assert_not_reached ("unexpected section");
2684 dwarf2_read_section (objfile
, info
);
2686 *sectp
= get_section_bfd_section (info
);
2687 *bufp
= info
->buffer
;
2688 *sizep
= info
->size
;
2691 /* A helper function to find the sections for a .dwz file. */
2694 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2696 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2698 /* Note that we only support the standard ELF names, because .dwz
2699 is ELF-only (at the time of writing). */
2700 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2702 dwz_file
->abbrev
.s
.section
= sectp
;
2703 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2705 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2707 dwz_file
->info
.s
.section
= sectp
;
2708 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2710 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2712 dwz_file
->str
.s
.section
= sectp
;
2713 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2715 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2717 dwz_file
->line
.s
.section
= sectp
;
2718 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2720 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2722 dwz_file
->macro
.s
.section
= sectp
;
2723 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2725 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2727 dwz_file
->gdb_index
.s
.section
= sectp
;
2728 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2732 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2733 there is no .gnu_debugaltlink section in the file. Error if there
2734 is such a section but the file cannot be found. */
2736 static struct dwz_file
*
2737 dwarf2_get_dwz_file (void)
2739 const char *filename
;
2740 struct dwz_file
*result
;
2741 bfd_size_type buildid_len_arg
;
2745 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2746 return dwarf2_per_objfile
->dwz_file
;
2748 bfd_set_error (bfd_error_no_error
);
2749 gdb::unique_xmalloc_ptr
<char> data
2750 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2751 &buildid_len_arg
, &buildid
));
2754 if (bfd_get_error () == bfd_error_no_error
)
2756 error (_("could not read '.gnu_debugaltlink' section: %s"),
2757 bfd_errmsg (bfd_get_error ()));
2760 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2762 buildid_len
= (size_t) buildid_len_arg
;
2764 filename
= data
.get ();
2766 std::string abs_storage
;
2767 if (!IS_ABSOLUTE_PATH (filename
))
2769 gdb::unique_xmalloc_ptr
<char> abs
2770 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2772 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2773 filename
= abs_storage
.c_str ();
2776 /* First try the file name given in the section. If that doesn't
2777 work, try to use the build-id instead. */
2778 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2779 if (dwz_bfd
!= NULL
)
2781 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2785 if (dwz_bfd
== NULL
)
2786 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2788 if (dwz_bfd
== NULL
)
2789 error (_("could not find '.gnu_debugaltlink' file for %s"),
2790 objfile_name (dwarf2_per_objfile
->objfile
));
2792 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2794 result
->dwz_bfd
= dwz_bfd
.release ();
2796 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2798 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2799 dwarf2_per_objfile
->dwz_file
= result
;
2803 /* DWARF quick_symbols_functions support. */
2805 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2806 unique line tables, so we maintain a separate table of all .debug_line
2807 derived entries to support the sharing.
2808 All the quick functions need is the list of file names. We discard the
2809 line_header when we're done and don't need to record it here. */
2810 struct quick_file_names
2812 /* The data used to construct the hash key. */
2813 struct stmt_list_hash hash
;
2815 /* The number of entries in file_names, real_names. */
2816 unsigned int num_file_names
;
2818 /* The file names from the line table, after being run through
2820 const char **file_names
;
2822 /* The file names from the line table after being run through
2823 gdb_realpath. These are computed lazily. */
2824 const char **real_names
;
2827 /* When using the index (and thus not using psymtabs), each CU has an
2828 object of this type. This is used to hold information needed by
2829 the various "quick" methods. */
2830 struct dwarf2_per_cu_quick_data
2832 /* The file table. This can be NULL if there was no file table
2833 or it's currently not read in.
2834 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2835 struct quick_file_names
*file_names
;
2837 /* The corresponding symbol table. This is NULL if symbols for this
2838 CU have not yet been read. */
2839 struct compunit_symtab
*compunit_symtab
;
2841 /* A temporary mark bit used when iterating over all CUs in
2842 expand_symtabs_matching. */
2843 unsigned int mark
: 1;
2845 /* True if we've tried to read the file table and found there isn't one.
2846 There will be no point in trying to read it again next time. */
2847 unsigned int no_file_data
: 1;
2850 /* Utility hash function for a stmt_list_hash. */
2853 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2857 if (stmt_list_hash
->dwo_unit
!= NULL
)
2858 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2859 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2863 /* Utility equality function for a stmt_list_hash. */
2866 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2867 const struct stmt_list_hash
*rhs
)
2869 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2871 if (lhs
->dwo_unit
!= NULL
2872 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2875 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2878 /* Hash function for a quick_file_names. */
2881 hash_file_name_entry (const void *e
)
2883 const struct quick_file_names
*file_data
2884 = (const struct quick_file_names
*) e
;
2886 return hash_stmt_list_entry (&file_data
->hash
);
2889 /* Equality function for a quick_file_names. */
2892 eq_file_name_entry (const void *a
, const void *b
)
2894 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2895 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2897 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2900 /* Delete function for a quick_file_names. */
2903 delete_file_name_entry (void *e
)
2905 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2908 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2910 xfree ((void*) file_data
->file_names
[i
]);
2911 if (file_data
->real_names
)
2912 xfree ((void*) file_data
->real_names
[i
]);
2915 /* The space for the struct itself lives on objfile_obstack,
2916 so we don't free it here. */
2919 /* Create a quick_file_names hash table. */
2922 create_quick_file_names_table (unsigned int nr_initial_entries
)
2924 return htab_create_alloc (nr_initial_entries
,
2925 hash_file_name_entry
, eq_file_name_entry
,
2926 delete_file_name_entry
, xcalloc
, xfree
);
2929 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2930 have to be created afterwards. You should call age_cached_comp_units after
2931 processing PER_CU->CU. dw2_setup must have been already called. */
2934 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2936 if (per_cu
->is_debug_types
)
2937 load_full_type_unit (per_cu
);
2939 load_full_comp_unit (per_cu
, language_minimal
);
2941 if (per_cu
->cu
== NULL
)
2942 return; /* Dummy CU. */
2944 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2947 /* Read in the symbols for PER_CU. */
2950 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2952 struct cleanup
*back_to
;
2954 /* Skip type_unit_groups, reading the type units they contain
2955 is handled elsewhere. */
2956 if (IS_TYPE_UNIT_GROUP (per_cu
))
2959 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2961 if (dwarf2_per_objfile
->using_index
2962 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2963 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2965 queue_comp_unit (per_cu
, language_minimal
);
2968 /* If we just loaded a CU from a DWO, and we're working with an index
2969 that may badly handle TUs, load all the TUs in that DWO as well.
2970 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2971 if (!per_cu
->is_debug_types
2972 && per_cu
->cu
!= NULL
2973 && per_cu
->cu
->dwo_unit
!= NULL
2974 && dwarf2_per_objfile
->index_table
!= NULL
2975 && dwarf2_per_objfile
->index_table
->version
<= 7
2976 /* DWP files aren't supported yet. */
2977 && get_dwp_file () == NULL
)
2978 queue_and_load_all_dwo_tus (per_cu
);
2983 /* Age the cache, releasing compilation units that have not
2984 been used recently. */
2985 age_cached_comp_units ();
2987 do_cleanups (back_to
);
2990 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2991 the objfile from which this CU came. Returns the resulting symbol
2994 static struct compunit_symtab
*
2995 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2997 gdb_assert (dwarf2_per_objfile
->using_index
);
2998 if (!per_cu
->v
.quick
->compunit_symtab
)
3000 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3001 scoped_restore decrementer
= increment_reading_symtab ();
3002 dw2_do_instantiate_symtab (per_cu
);
3003 process_cu_includes ();
3004 do_cleanups (back_to
);
3007 return per_cu
->v
.quick
->compunit_symtab
;
3010 /* Return the CU/TU given its index.
3012 This is intended for loops like:
3014 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3015 + dwarf2_per_objfile->n_type_units); ++i)
3017 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
3023 static struct dwarf2_per_cu_data
*
3024 dw2_get_cutu (int index
)
3026 if (index
>= dwarf2_per_objfile
->n_comp_units
)
3028 index
-= dwarf2_per_objfile
->n_comp_units
;
3029 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
3030 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
3033 return dwarf2_per_objfile
->all_comp_units
[index
];
3036 /* Return the CU given its index.
3037 This differs from dw2_get_cutu in that it's for when you know INDEX
3040 static struct dwarf2_per_cu_data
*
3041 dw2_get_cu (int index
)
3043 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
3045 return dwarf2_per_objfile
->all_comp_units
[index
];
3048 /* A helper for create_cus_from_index that handles a given list of
3052 create_cus_from_index_list (struct objfile
*objfile
,
3053 const gdb_byte
*cu_list
, offset_type n_elements
,
3054 struct dwarf2_section_info
*section
,
3060 for (i
= 0; i
< n_elements
; i
+= 2)
3062 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3064 sect_offset sect_off
3065 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3066 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3069 dwarf2_per_cu_data
*the_cu
3070 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3071 struct dwarf2_per_cu_data
);
3072 the_cu
->sect_off
= sect_off
;
3073 the_cu
->length
= length
;
3074 the_cu
->objfile
= objfile
;
3075 the_cu
->section
= section
;
3076 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3077 struct dwarf2_per_cu_quick_data
);
3078 the_cu
->is_dwz
= is_dwz
;
3079 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
3083 /* Read the CU list from the mapped index, and use it to create all
3084 the CU objects for this objfile. */
3087 create_cus_from_index (struct objfile
*objfile
,
3088 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3089 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3091 struct dwz_file
*dwz
;
3093 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3094 dwarf2_per_objfile
->all_comp_units
=
3095 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3096 dwarf2_per_objfile
->n_comp_units
);
3098 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3099 &dwarf2_per_objfile
->info
, 0, 0);
3101 if (dwz_elements
== 0)
3104 dwz
= dwarf2_get_dwz_file ();
3105 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3106 cu_list_elements
/ 2);
3109 /* Create the signatured type hash table from the index. */
3112 create_signatured_type_table_from_index (struct objfile
*objfile
,
3113 struct dwarf2_section_info
*section
,
3114 const gdb_byte
*bytes
,
3115 offset_type elements
)
3118 htab_t sig_types_hash
;
3120 dwarf2_per_objfile
->n_type_units
3121 = dwarf2_per_objfile
->n_allocated_type_units
3123 dwarf2_per_objfile
->all_type_units
=
3124 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3126 sig_types_hash
= allocate_signatured_type_table (objfile
);
3128 for (i
= 0; i
< elements
; i
+= 3)
3130 struct signatured_type
*sig_type
;
3133 cu_offset type_offset_in_tu
;
3135 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3136 sect_offset sect_off
3137 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3139 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3141 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3144 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3145 struct signatured_type
);
3146 sig_type
->signature
= signature
;
3147 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3148 sig_type
->per_cu
.is_debug_types
= 1;
3149 sig_type
->per_cu
.section
= section
;
3150 sig_type
->per_cu
.sect_off
= sect_off
;
3151 sig_type
->per_cu
.objfile
= objfile
;
3152 sig_type
->per_cu
.v
.quick
3153 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3154 struct dwarf2_per_cu_quick_data
);
3156 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3159 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3162 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3165 /* Read the address map data from the mapped index, and use it to
3166 populate the objfile's psymtabs_addrmap. */
3169 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
3171 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3172 const gdb_byte
*iter
, *end
;
3173 struct addrmap
*mutable_map
;
3176 auto_obstack temp_obstack
;
3178 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3180 iter
= index
->address_table
;
3181 end
= iter
+ index
->address_table_size
;
3183 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3187 ULONGEST hi
, lo
, cu_index
;
3188 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3190 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3192 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3197 complaint (&symfile_complaints
,
3198 _(".gdb_index address table has invalid range (%s - %s)"),
3199 hex_string (lo
), hex_string (hi
));
3203 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3205 complaint (&symfile_complaints
,
3206 _(".gdb_index address table has invalid CU number %u"),
3207 (unsigned) cu_index
);
3211 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3212 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3213 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
3216 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3217 &objfile
->objfile_obstack
);
3220 /* The hash function for strings in the mapped index. This is the same as
3221 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3222 implementation. This is necessary because the hash function is tied to the
3223 format of the mapped index file. The hash values do not have to match with
3226 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3229 mapped_index_string_hash (int index_version
, const void *p
)
3231 const unsigned char *str
= (const unsigned char *) p
;
3235 while ((c
= *str
++) != 0)
3237 if (index_version
>= 5)
3239 r
= r
* 67 + c
- 113;
3245 /* Find a slot in the mapped index INDEX for the object named NAME.
3246 If NAME is found, set *VEC_OUT to point to the CU vector in the
3247 constant pool and return true. If NAME cannot be found, return
3251 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3252 offset_type
**vec_out
)
3255 offset_type slot
, step
;
3256 int (*cmp
) (const char *, const char *);
3258 gdb::unique_xmalloc_ptr
<char> without_params
;
3259 if (current_language
->la_language
== language_cplus
3260 || current_language
->la_language
== language_fortran
3261 || current_language
->la_language
== language_d
)
3263 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3266 if (strchr (name
, '(') != NULL
)
3268 without_params
= cp_remove_params (name
);
3270 if (without_params
!= NULL
)
3271 name
= without_params
.get ();
3275 /* Index version 4 did not support case insensitive searches. But the
3276 indices for case insensitive languages are built in lowercase, therefore
3277 simulate our NAME being searched is also lowercased. */
3278 hash
= mapped_index_string_hash ((index
->version
== 4
3279 && case_sensitivity
== case_sensitive_off
3280 ? 5 : index
->version
),
3283 slot
= hash
& (index
->symbol_table_slots
- 1);
3284 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3285 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3289 /* Convert a slot number to an offset into the table. */
3290 offset_type i
= 2 * slot
;
3292 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3295 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3296 if (!cmp (name
, str
))
3298 *vec_out
= (offset_type
*) (index
->constant_pool
3299 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3303 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3307 /* A helper function that reads the .gdb_index from SECTION and fills
3308 in MAP. FILENAME is the name of the file containing the section;
3309 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3310 ok to use deprecated sections.
3312 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3313 out parameters that are filled in with information about the CU and
3314 TU lists in the section.
3316 Returns 1 if all went well, 0 otherwise. */
3319 read_index_from_section (struct objfile
*objfile
,
3320 const char *filename
,
3322 struct dwarf2_section_info
*section
,
3323 struct mapped_index
*map
,
3324 const gdb_byte
**cu_list
,
3325 offset_type
*cu_list_elements
,
3326 const gdb_byte
**types_list
,
3327 offset_type
*types_list_elements
)
3329 const gdb_byte
*addr
;
3330 offset_type version
;
3331 offset_type
*metadata
;
3334 if (dwarf2_section_empty_p (section
))
3337 /* Older elfutils strip versions could keep the section in the main
3338 executable while splitting it for the separate debug info file. */
3339 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3342 dwarf2_read_section (objfile
, section
);
3344 addr
= section
->buffer
;
3345 /* Version check. */
3346 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3347 /* Versions earlier than 3 emitted every copy of a psymbol. This
3348 causes the index to behave very poorly for certain requests. Version 3
3349 contained incomplete addrmap. So, it seems better to just ignore such
3353 static int warning_printed
= 0;
3354 if (!warning_printed
)
3356 warning (_("Skipping obsolete .gdb_index section in %s."),
3358 warning_printed
= 1;
3362 /* Index version 4 uses a different hash function than index version
3365 Versions earlier than 6 did not emit psymbols for inlined
3366 functions. Using these files will cause GDB not to be able to
3367 set breakpoints on inlined functions by name, so we ignore these
3368 indices unless the user has done
3369 "set use-deprecated-index-sections on". */
3370 if (version
< 6 && !deprecated_ok
)
3372 static int warning_printed
= 0;
3373 if (!warning_printed
)
3376 Skipping deprecated .gdb_index section in %s.\n\
3377 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3378 to use the section anyway."),
3380 warning_printed
= 1;
3384 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3385 of the TU (for symbols coming from TUs),
3386 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3387 Plus gold-generated indices can have duplicate entries for global symbols,
3388 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3389 These are just performance bugs, and we can't distinguish gdb-generated
3390 indices from gold-generated ones, so issue no warning here. */
3392 /* Indexes with higher version than the one supported by GDB may be no
3393 longer backward compatible. */
3397 map
->version
= version
;
3398 map
->total_size
= section
->size
;
3400 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3403 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3404 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3408 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3409 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3410 - MAYBE_SWAP (metadata
[i
]))
3414 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3415 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3416 - MAYBE_SWAP (metadata
[i
]));
3419 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3420 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3421 - MAYBE_SWAP (metadata
[i
]))
3422 / (2 * sizeof (offset_type
)));
3425 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3431 /* Read the index file. If everything went ok, initialize the "quick"
3432 elements of all the CUs and return 1. Otherwise, return 0. */
3435 dwarf2_read_index (struct objfile
*objfile
)
3437 struct mapped_index local_map
, *map
;
3438 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3439 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3440 struct dwz_file
*dwz
;
3442 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3443 use_deprecated_index_sections
,
3444 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3445 &cu_list
, &cu_list_elements
,
3446 &types_list
, &types_list_elements
))
3449 /* Don't use the index if it's empty. */
3450 if (local_map
.symbol_table_slots
== 0)
3453 /* If there is a .dwz file, read it so we can get its CU list as
3455 dwz
= dwarf2_get_dwz_file ();
3458 struct mapped_index dwz_map
;
3459 const gdb_byte
*dwz_types_ignore
;
3460 offset_type dwz_types_elements_ignore
;
3462 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3464 &dwz
->gdb_index
, &dwz_map
,
3465 &dwz_list
, &dwz_list_elements
,
3467 &dwz_types_elements_ignore
))
3469 warning (_("could not read '.gdb_index' section from %s; skipping"),
3470 bfd_get_filename (dwz
->dwz_bfd
));
3475 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3478 if (types_list_elements
)
3480 struct dwarf2_section_info
*section
;
3482 /* We can only handle a single .debug_types when we have an
3484 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3487 section
= VEC_index (dwarf2_section_info_def
,
3488 dwarf2_per_objfile
->types
, 0);
3490 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3491 types_list_elements
);
3494 create_addrmap_from_index (objfile
, &local_map
);
3496 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3497 map
= new (map
) mapped_index ();
3500 dwarf2_per_objfile
->index_table
= map
;
3501 dwarf2_per_objfile
->using_index
= 1;
3502 dwarf2_per_objfile
->quick_file_names_table
=
3503 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3508 /* A helper for the "quick" functions which sets the global
3509 dwarf2_per_objfile according to OBJFILE. */
3512 dw2_setup (struct objfile
*objfile
)
3514 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3515 objfile_data (objfile
, dwarf2_objfile_data_key
));
3516 gdb_assert (dwarf2_per_objfile
);
3519 /* die_reader_func for dw2_get_file_names. */
3522 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3523 const gdb_byte
*info_ptr
,
3524 struct die_info
*comp_unit_die
,
3528 struct dwarf2_cu
*cu
= reader
->cu
;
3529 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3530 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3531 struct dwarf2_per_cu_data
*lh_cu
;
3532 struct attribute
*attr
;
3535 struct quick_file_names
*qfn
;
3537 gdb_assert (! this_cu
->is_debug_types
);
3539 /* Our callers never want to match partial units -- instead they
3540 will match the enclosing full CU. */
3541 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3543 this_cu
->v
.quick
->no_file_data
= 1;
3551 sect_offset line_offset
{};
3553 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3556 struct quick_file_names find_entry
;
3558 line_offset
= (sect_offset
) DW_UNSND (attr
);
3560 /* We may have already read in this line header (TU line header sharing).
3561 If we have we're done. */
3562 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3563 find_entry
.hash
.line_sect_off
= line_offset
;
3564 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3565 &find_entry
, INSERT
);
3568 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3572 lh
= dwarf_decode_line_header (line_offset
, cu
);
3576 lh_cu
->v
.quick
->no_file_data
= 1;
3580 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3581 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3582 qfn
->hash
.line_sect_off
= line_offset
;
3583 gdb_assert (slot
!= NULL
);
3586 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3588 qfn
->num_file_names
= lh
->file_names
.size ();
3590 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3591 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3592 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3593 qfn
->real_names
= NULL
;
3595 lh_cu
->v
.quick
->file_names
= qfn
;
3598 /* A helper for the "quick" functions which attempts to read the line
3599 table for THIS_CU. */
3601 static struct quick_file_names
*
3602 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3604 /* This should never be called for TUs. */
3605 gdb_assert (! this_cu
->is_debug_types
);
3606 /* Nor type unit groups. */
3607 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3609 if (this_cu
->v
.quick
->file_names
!= NULL
)
3610 return this_cu
->v
.quick
->file_names
;
3611 /* If we know there is no line data, no point in looking again. */
3612 if (this_cu
->v
.quick
->no_file_data
)
3615 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3617 if (this_cu
->v
.quick
->no_file_data
)
3619 return this_cu
->v
.quick
->file_names
;
3622 /* A helper for the "quick" functions which computes and caches the
3623 real path for a given file name from the line table. */
3626 dw2_get_real_path (struct objfile
*objfile
,
3627 struct quick_file_names
*qfn
, int index
)
3629 if (qfn
->real_names
== NULL
)
3630 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3631 qfn
->num_file_names
, const char *);
3633 if (qfn
->real_names
[index
] == NULL
)
3634 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3636 return qfn
->real_names
[index
];
3639 static struct symtab
*
3640 dw2_find_last_source_symtab (struct objfile
*objfile
)
3642 struct compunit_symtab
*cust
;
3645 dw2_setup (objfile
);
3646 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3647 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3650 return compunit_primary_filetab (cust
);
3653 /* Traversal function for dw2_forget_cached_source_info. */
3656 dw2_free_cached_file_names (void **slot
, void *info
)
3658 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3660 if (file_data
->real_names
)
3664 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3666 xfree ((void*) file_data
->real_names
[i
]);
3667 file_data
->real_names
[i
] = NULL
;
3675 dw2_forget_cached_source_info (struct objfile
*objfile
)
3677 dw2_setup (objfile
);
3679 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3680 dw2_free_cached_file_names
, NULL
);
3683 /* Helper function for dw2_map_symtabs_matching_filename that expands
3684 the symtabs and calls the iterator. */
3687 dw2_map_expand_apply (struct objfile
*objfile
,
3688 struct dwarf2_per_cu_data
*per_cu
,
3689 const char *name
, const char *real_path
,
3690 gdb::function_view
<bool (symtab
*)> callback
)
3692 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3694 /* Don't visit already-expanded CUs. */
3695 if (per_cu
->v
.quick
->compunit_symtab
)
3698 /* This may expand more than one symtab, and we want to iterate over
3700 dw2_instantiate_symtab (per_cu
);
3702 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3703 last_made
, callback
);
3706 /* Implementation of the map_symtabs_matching_filename method. */
3709 dw2_map_symtabs_matching_filename
3710 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3711 gdb::function_view
<bool (symtab
*)> callback
)
3714 const char *name_basename
= lbasename (name
);
3716 dw2_setup (objfile
);
3718 /* The rule is CUs specify all the files, including those used by
3719 any TU, so there's no need to scan TUs here. */
3721 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3724 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3725 struct quick_file_names
*file_data
;
3727 /* We only need to look at symtabs not already expanded. */
3728 if (per_cu
->v
.quick
->compunit_symtab
)
3731 file_data
= dw2_get_file_names (per_cu
);
3732 if (file_data
== NULL
)
3735 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3737 const char *this_name
= file_data
->file_names
[j
];
3738 const char *this_real_name
;
3740 if (compare_filenames_for_search (this_name
, name
))
3742 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3748 /* Before we invoke realpath, which can get expensive when many
3749 files are involved, do a quick comparison of the basenames. */
3750 if (! basenames_may_differ
3751 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3754 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3755 if (compare_filenames_for_search (this_real_name
, name
))
3757 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3763 if (real_path
!= NULL
)
3765 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3766 gdb_assert (IS_ABSOLUTE_PATH (name
));
3767 if (this_real_name
!= NULL
3768 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3770 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3782 /* Struct used to manage iterating over all CUs looking for a symbol. */
3784 struct dw2_symtab_iterator
3786 /* The internalized form of .gdb_index. */
3787 struct mapped_index
*index
;
3788 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3789 int want_specific_block
;
3790 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3791 Unused if !WANT_SPECIFIC_BLOCK. */
3793 /* The kind of symbol we're looking for. */
3795 /* The list of CUs from the index entry of the symbol,
3796 or NULL if not found. */
3798 /* The next element in VEC to look at. */
3800 /* The number of elements in VEC, or zero if there is no match. */
3802 /* Have we seen a global version of the symbol?
3803 If so we can ignore all further global instances.
3804 This is to work around gold/15646, inefficient gold-generated
3809 /* Initialize the index symtab iterator ITER.
3810 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3811 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3814 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3815 struct mapped_index
*index
,
3816 int want_specific_block
,
3821 iter
->index
= index
;
3822 iter
->want_specific_block
= want_specific_block
;
3823 iter
->block_index
= block_index
;
3824 iter
->domain
= domain
;
3826 iter
->global_seen
= 0;
3828 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3829 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3837 /* Return the next matching CU or NULL if there are no more. */
3839 static struct dwarf2_per_cu_data
*
3840 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3842 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3844 offset_type cu_index_and_attrs
=
3845 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3846 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3847 struct dwarf2_per_cu_data
*per_cu
;
3848 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3849 /* This value is only valid for index versions >= 7. */
3850 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3851 gdb_index_symbol_kind symbol_kind
=
3852 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3853 /* Only check the symbol attributes if they're present.
3854 Indices prior to version 7 don't record them,
3855 and indices >= 7 may elide them for certain symbols
3856 (gold does this). */
3858 (iter
->index
->version
>= 7
3859 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3861 /* Don't crash on bad data. */
3862 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3863 + dwarf2_per_objfile
->n_type_units
))
3865 complaint (&symfile_complaints
,
3866 _(".gdb_index entry has bad CU index"
3868 objfile_name (dwarf2_per_objfile
->objfile
));
3872 per_cu
= dw2_get_cutu (cu_index
);
3874 /* Skip if already read in. */
3875 if (per_cu
->v
.quick
->compunit_symtab
)
3878 /* Check static vs global. */
3881 if (iter
->want_specific_block
3882 && want_static
!= is_static
)
3884 /* Work around gold/15646. */
3885 if (!is_static
&& iter
->global_seen
)
3888 iter
->global_seen
= 1;
3891 /* Only check the symbol's kind if it has one. */
3894 switch (iter
->domain
)
3897 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3898 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3899 /* Some types are also in VAR_DOMAIN. */
3900 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3904 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3908 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3923 static struct compunit_symtab
*
3924 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3925 const char *name
, domain_enum domain
)
3927 struct compunit_symtab
*stab_best
= NULL
;
3928 struct mapped_index
*index
;
3930 dw2_setup (objfile
);
3932 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3934 index
= dwarf2_per_objfile
->index_table
;
3936 /* index is NULL if OBJF_READNOW. */
3939 struct dw2_symtab_iterator iter
;
3940 struct dwarf2_per_cu_data
*per_cu
;
3942 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3944 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3946 struct symbol
*sym
, *with_opaque
= NULL
;
3947 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3948 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3949 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3951 sym
= block_find_symbol (block
, name
, domain
,
3952 block_find_non_opaque_type_preferred
,
3955 /* Some caution must be observed with overloaded functions
3956 and methods, since the index will not contain any overload
3957 information (but NAME might contain it). */
3960 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3962 if (with_opaque
!= NULL
3963 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3966 /* Keep looking through other CUs. */
3974 dw2_print_stats (struct objfile
*objfile
)
3976 int i
, total
, count
;
3978 dw2_setup (objfile
);
3979 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3981 for (i
= 0; i
< total
; ++i
)
3983 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3985 if (!per_cu
->v
.quick
->compunit_symtab
)
3988 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3989 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3992 /* This dumps minimal information about the index.
3993 It is called via "mt print objfiles".
3994 One use is to verify .gdb_index has been loaded by the
3995 gdb.dwarf2/gdb-index.exp testcase. */
3998 dw2_dump (struct objfile
*objfile
)
4000 dw2_setup (objfile
);
4001 gdb_assert (dwarf2_per_objfile
->using_index
);
4002 printf_filtered (".gdb_index:");
4003 if (dwarf2_per_objfile
->index_table
!= NULL
)
4005 printf_filtered (" version %d\n",
4006 dwarf2_per_objfile
->index_table
->version
);
4009 printf_filtered (" faked for \"readnow\"\n");
4010 printf_filtered ("\n");
4014 dw2_relocate (struct objfile
*objfile
,
4015 const struct section_offsets
*new_offsets
,
4016 const struct section_offsets
*delta
)
4018 /* There's nothing to relocate here. */
4022 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4023 const char *func_name
)
4025 struct mapped_index
*index
;
4027 dw2_setup (objfile
);
4029 index
= dwarf2_per_objfile
->index_table
;
4031 /* index is NULL if OBJF_READNOW. */
4034 struct dw2_symtab_iterator iter
;
4035 struct dwarf2_per_cu_data
*per_cu
;
4037 /* Note: It doesn't matter what we pass for block_index here. */
4038 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4041 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4042 dw2_instantiate_symtab (per_cu
);
4047 dw2_expand_all_symtabs (struct objfile
*objfile
)
4051 dw2_setup (objfile
);
4053 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4054 + dwarf2_per_objfile
->n_type_units
); ++i
)
4056 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4058 dw2_instantiate_symtab (per_cu
);
4063 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4064 const char *fullname
)
4068 dw2_setup (objfile
);
4070 /* We don't need to consider type units here.
4071 This is only called for examining code, e.g. expand_line_sal.
4072 There can be an order of magnitude (or more) more type units
4073 than comp units, and we avoid them if we can. */
4075 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4078 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4079 struct quick_file_names
*file_data
;
4081 /* We only need to look at symtabs not already expanded. */
4082 if (per_cu
->v
.quick
->compunit_symtab
)
4085 file_data
= dw2_get_file_names (per_cu
);
4086 if (file_data
== NULL
)
4089 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4091 const char *this_fullname
= file_data
->file_names
[j
];
4093 if (filename_cmp (this_fullname
, fullname
) == 0)
4095 dw2_instantiate_symtab (per_cu
);
4103 dw2_map_matching_symbols (struct objfile
*objfile
,
4104 const char * name
, domain_enum domain
,
4106 int (*callback
) (struct block
*,
4107 struct symbol
*, void *),
4108 void *data
, symbol_name_match_type match
,
4109 symbol_compare_ftype
*ordered_compare
)
4111 /* Currently unimplemented; used for Ada. The function can be called if the
4112 current language is Ada for a non-Ada objfile using GNU index. As Ada
4113 does not look for non-Ada symbols this function should just return. */
4116 /* Symbol name matcher for .gdb_index names.
4118 Symbol names in .gdb_index have a few particularities:
4120 - There's no indication of which is the language of each symbol.
4122 Since each language has its own symbol name matching algorithm,
4123 and we don't know which language is the right one, we must match
4124 each symbol against all languages. This would be a potential
4125 performance problem if it were not mitigated by the
4126 mapped_index::name_components lookup table, which significantly
4127 reduces the number of times we need to call into this matcher,
4128 making it a non-issue.
4130 - Symbol names in the index have no overload (parameter)
4131 information. I.e., in C++, "foo(int)" and "foo(long)" both
4132 appear as "foo" in the index, for example.
4134 This means that the lookup names passed to the symbol name
4135 matcher functions must have no parameter information either
4136 because (e.g.) symbol search name "foo" does not match
4137 lookup-name "foo(int)" [while swapping search name for lookup
4140 class gdb_index_symbol_name_matcher
4143 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4144 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4146 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4147 Returns true if any matcher matches. */
4148 bool matches (const char *symbol_name
);
4151 /* A reference to the lookup name we're matching against. */
4152 const lookup_name_info
&m_lookup_name
;
4154 /* A vector holding all the different symbol name matchers, for all
4156 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4159 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4160 (const lookup_name_info
&lookup_name
)
4161 : m_lookup_name (lookup_name
)
4163 /* Prepare the vector of comparison functions upfront, to avoid
4164 doing the same work for each symbol. Care is taken to avoid
4165 matching with the same matcher more than once if/when multiple
4166 languages use the same matcher function. */
4167 auto &matchers
= m_symbol_name_matcher_funcs
;
4168 matchers
.reserve (nr_languages
);
4170 matchers
.push_back (default_symbol_name_matcher
);
4172 for (int i
= 0; i
< nr_languages
; i
++)
4174 const language_defn
*lang
= language_def ((enum language
) i
);
4175 if (lang
->la_get_symbol_name_matcher
!= NULL
)
4177 symbol_name_matcher_ftype
*name_matcher
4178 = lang
->la_get_symbol_name_matcher (m_lookup_name
);
4180 /* Don't insert the same comparison routine more than once.
4181 Note that we do this linear walk instead of a cheaper
4182 sorted insert, or use a std::set or something like that,
4183 because relative order of function addresses is not
4184 stable. This is not a problem in practice because the
4185 number of supported languages is low, and the cost here
4186 is tiny compared to the number of searches we'll do
4187 afterwards using this object. */
4188 if (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4190 matchers
.push_back (name_matcher
);
4196 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4198 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4199 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4205 /* Starting from a search name, return the string that finds the upper
4206 bound of all strings that start with SEARCH_NAME in a sorted name
4207 list. Returns the empty string to indicate that the upper bound is
4208 the end of the list. */
4211 make_sort_after_prefix_name (const char *search_name
)
4213 /* When looking to complete "func", we find the upper bound of all
4214 symbols that start with "func" by looking for where we'd insert
4215 the closest string that would follow "func" in lexicographical
4216 order. Usually, that's "func"-with-last-character-incremented,
4217 i.e. "fund". Mind non-ASCII characters, though. Usually those
4218 will be UTF-8 multi-byte sequences, but we can't be certain.
4219 Especially mind the 0xff character, which is a valid character in
4220 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4221 rule out compilers allowing it in identifiers. Note that
4222 conveniently, strcmp/strcasecmp are specified to compare
4223 characters interpreted as unsigned char. So what we do is treat
4224 the whole string as a base 256 number composed of a sequence of
4225 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4226 to 0, and carries 1 to the following more-significant position.
4227 If the very first character in SEARCH_NAME ends up incremented
4228 and carries/overflows, then the upper bound is the end of the
4229 list. The string after the empty string is also the empty
4232 Some examples of this operation:
4234 SEARCH_NAME => "+1" RESULT
4238 "\xff" "a" "\xff" => "\xff" "b"
4243 Then, with these symbols for example:
4249 completing "func" looks for symbols between "func" and
4250 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4251 which finds "func" and "func1", but not "fund".
4255 funcÿ (Latin1 'ÿ' [0xff])
4259 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4260 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4264 ÿÿ (Latin1 'ÿ' [0xff])
4267 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4268 the end of the list.
4270 std::string after
= search_name
;
4271 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4273 if (!after
.empty ())
4274 after
.back () = (unsigned char) after
.back () + 1;
4278 /* See declaration. */
4280 std::pair
<std::vector
<name_component
>::const_iterator
,
4281 std::vector
<name_component
>::const_iterator
>
4282 mapped_index::find_name_components_bounds
4283 (const lookup_name_info
&lookup_name_without_params
) const
4286 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4289 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4291 /* Comparison function object for lower_bound that matches against a
4292 given symbol name. */
4293 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4296 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4297 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4298 return name_cmp (elem_name
, name
) < 0;
4301 /* Comparison function object for upper_bound that matches against a
4302 given symbol name. */
4303 auto lookup_compare_upper
= [&] (const char *name
,
4304 const name_component
&elem
)
4306 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4307 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4308 return name_cmp (name
, elem_name
) < 0;
4311 auto begin
= this->name_components
.begin ();
4312 auto end
= this->name_components
.end ();
4314 /* Find the lower bound. */
4317 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4320 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4323 /* Find the upper bound. */
4326 if (lookup_name_without_params
.completion_mode ())
4328 /* In completion mode, we want UPPER to point past all
4329 symbols names that have the same prefix. I.e., with
4330 these symbols, and completing "func":
4332 function << lower bound
4334 other_function << upper bound
4336 We find the upper bound by looking for the insertion
4337 point of "func"-with-last-character-incremented,
4339 std::string after
= make_sort_after_prefix_name (cplus
);
4342 return std::lower_bound (lower
, end
, after
.c_str (),
4343 lookup_compare_lower
);
4346 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4349 return {lower
, upper
};
4352 /* See declaration. */
4355 mapped_index::build_name_components ()
4357 if (!this->name_components
.empty ())
4360 this->name_components_casing
= case_sensitivity
;
4362 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4364 /* The code below only knows how to break apart components of C++
4365 symbol names (and other languages that use '::' as
4366 namespace/module separator). If we add support for wild matching
4367 to some language that uses some other operator (E.g., Ada, Go and
4368 D use '.'), then we'll need to try splitting the symbol name
4369 according to that language too. Note that Ada does support wild
4370 matching, but doesn't currently support .gdb_index. */
4371 for (size_t iter
= 0; iter
< this->symbol_table_slots
; ++iter
)
4373 offset_type idx
= 2 * iter
;
4375 if (this->symbol_table
[idx
] == 0
4376 && this->symbol_table
[idx
+ 1] == 0)
4379 const char *name
= this->symbol_name_at (idx
);
4381 /* Add each name component to the name component table. */
4382 unsigned int previous_len
= 0;
4383 for (unsigned int current_len
= cp_find_first_component (name
);
4384 name
[current_len
] != '\0';
4385 current_len
+= cp_find_first_component (name
+ current_len
))
4387 gdb_assert (name
[current_len
] == ':');
4388 this->name_components
.push_back ({previous_len
, idx
});
4389 /* Skip the '::'. */
4391 previous_len
= current_len
;
4393 this->name_components
.push_back ({previous_len
, idx
});
4396 /* Sort name_components elements by name. */
4397 auto name_comp_compare
= [&] (const name_component
&left
,
4398 const name_component
&right
)
4400 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4401 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4403 const char *left_name
= left_qualified
+ left
.name_offset
;
4404 const char *right_name
= right_qualified
+ right
.name_offset
;
4406 return name_cmp (left_name
, right_name
) < 0;
4409 std::sort (this->name_components
.begin (),
4410 this->name_components
.end (),
4414 /* Helper for dw2_expand_symtabs_matching that works with a
4415 mapped_index instead of the containing objfile. This is split to a
4416 separate function in order to be able to unit test the
4417 name_components matching using a mock mapped_index. For each
4418 symbol name that matches, calls MATCH_CALLBACK, passing it the
4419 symbol's index in the mapped_index symbol table. */
4422 dw2_expand_symtabs_matching_symbol
4423 (mapped_index
&index
,
4424 const lookup_name_info
&lookup_name_in
,
4425 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4426 enum search_domain kind
,
4427 gdb::function_view
<void (offset_type
)> match_callback
)
4429 lookup_name_info lookup_name_without_params
4430 = lookup_name_in
.make_ignore_params ();
4431 gdb_index_symbol_name_matcher lookup_name_matcher
4432 (lookup_name_without_params
);
4434 /* Build the symbol name component sorted vector, if we haven't
4436 index
.build_name_components ();
4438 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4440 /* Now for each symbol name in range, check to see if we have a name
4441 match, and if so, call the MATCH_CALLBACK callback. */
4443 /* The same symbol may appear more than once in the range though.
4444 E.g., if we're looking for symbols that complete "w", and we have
4445 a symbol named "w1::w2", we'll find the two name components for
4446 that same symbol in the range. To be sure we only call the
4447 callback once per symbol, we first collect the symbol name
4448 indexes that matched in a temporary vector and ignore
4450 std::vector
<offset_type
> matches
;
4451 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4453 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4455 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4457 if (!lookup_name_matcher
.matches (qualified
)
4458 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4461 matches
.push_back (bounds
.first
->idx
);
4464 std::sort (matches
.begin (), matches
.end ());
4466 /* Finally call the callback, once per match. */
4468 for (offset_type idx
: matches
)
4472 match_callback (idx
);
4477 /* Above we use a type wider than idx's for 'prev', since 0 and
4478 (offset_type)-1 are both possible values. */
4479 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4484 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4486 /* A wrapper around mapped_index that builds a mock mapped_index, from
4487 the symbol list passed as parameter to the constructor. */
4488 class mock_mapped_index
4492 mock_mapped_index (const char *(&symbols
)[N
])
4493 : mock_mapped_index (symbols
, N
)
4496 /* Access the built index. */
4497 mapped_index
&index ()
4501 mock_mapped_index(const mock_mapped_index
&) = delete;
4502 void operator= (const mock_mapped_index
&) = delete;
4505 mock_mapped_index (const char **symbols
, size_t symbols_size
)
4507 /* No string can live at offset zero. Add a dummy entry. */
4508 obstack_grow_str0 (&m_constant_pool
, "");
4510 for (size_t i
= 0; i
< symbols_size
; i
++)
4512 const char *sym
= symbols
[i
];
4513 size_t offset
= obstack_object_size (&m_constant_pool
);
4514 obstack_grow_str0 (&m_constant_pool
, sym
);
4515 m_symbol_table
.push_back (offset
);
4516 m_symbol_table
.push_back (0);
4519 m_index
.constant_pool
= (const char *) obstack_base (&m_constant_pool
);
4520 m_index
.symbol_table
= m_symbol_table
.data ();
4521 m_index
.symbol_table_slots
= m_symbol_table
.size () / 2;
4525 /* The built mapped_index. */
4526 mapped_index m_index
{};
4528 /* The storage that the built mapped_index uses for symbol and
4529 constant pool tables. */
4530 std::vector
<offset_type
> m_symbol_table
;
4531 auto_obstack m_constant_pool
;
4534 /* Convenience function that converts a NULL pointer to a "<null>"
4535 string, to pass to print routines. */
4538 string_or_null (const char *str
)
4540 return str
!= NULL
? str
: "<null>";
4543 /* Check if a lookup_name_info built from
4544 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4545 index. EXPECTED_LIST is the list of expected matches, in expected
4546 matching order. If no match expected, then an empty list is
4547 specified. Returns true on success. On failure prints a warning
4548 indicating the file:line that failed, and returns false. */
4551 check_match (const char *file
, int line
,
4552 mock_mapped_index
&mock_index
,
4553 const char *name
, symbol_name_match_type match_type
,
4554 bool completion_mode
,
4555 std::initializer_list
<const char *> expected_list
)
4557 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4559 bool matched
= true;
4561 auto mismatch
= [&] (const char *expected_str
,
4564 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4565 "expected=\"%s\", got=\"%s\"\n"),
4567 (match_type
== symbol_name_match_type::FULL
4569 name
, string_or_null (expected_str
), string_or_null (got
));
4573 auto expected_it
= expected_list
.begin ();
4574 auto expected_end
= expected_list
.end ();
4576 dw2_expand_symtabs_matching_symbol (mock_index
.index (), lookup_name
,
4578 [&] (offset_type idx
)
4580 const char *matched_name
= mock_index
.index ().symbol_name_at (idx
);
4581 const char *expected_str
4582 = expected_it
== expected_end
? NULL
: *expected_it
++;
4584 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4585 mismatch (expected_str
, matched_name
);
4588 const char *expected_str
4589 = expected_it
== expected_end
? NULL
: *expected_it
++;
4590 if (expected_str
!= NULL
)
4591 mismatch (expected_str
, NULL
);
4596 /* The symbols added to the mock mapped_index for testing (in
4598 static const char *test_symbols
[] = {
4608 /* These are used to check that the increment-last-char in the
4609 matching algorithm for completion doesn't match "t1_fund" when
4610 completing "t1_func". */
4616 /* A UTF-8 name with multi-byte sequences to make sure that
4617 cp-name-parser understands this as a single identifier ("função"
4618 is "function" in PT). */
4621 /* \377 (0xff) is Latin1 'ÿ'. */
4624 /* \377 (0xff) is Latin1 'ÿ'. */
4628 /* A name with all sorts of complications. Starts with "z" to make
4629 it easier for the completion tests below. */
4630 #define Z_SYM_NAME \
4631 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4632 "::tuple<(anonymous namespace)::ui*, " \
4633 "std::default_delete<(anonymous namespace)::ui>, void>"
4638 /* Returns true if the mapped_index::find_name_component_bounds method
4639 finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, in
4643 check_find_bounds_finds (mapped_index
&index
,
4644 const char *search_name
,
4645 gdb::array_view
<const char *> expected_syms
)
4647 lookup_name_info
lookup_name (search_name
,
4648 symbol_name_match_type::FULL
, true);
4650 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4652 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4653 if (distance
!= expected_syms
.size ())
4656 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4658 auto nc_elem
= bounds
.first
+ exp_elem
;
4659 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4660 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4667 /* Test the lower-level mapped_index::find_name_component_bounds
4671 test_mapped_index_find_name_component_bounds ()
4673 mock_mapped_index
mock_index (test_symbols
);
4675 mock_index
.index ().build_name_components ();
4677 /* Test the lower-level mapped_index::find_name_component_bounds
4678 method in completion mode. */
4680 static const char *expected_syms
[] = {
4685 SELF_CHECK (check_find_bounds_finds (mock_index
.index (),
4686 "t1_func", expected_syms
));
4689 /* Check that the increment-last-char in the name matching algorithm
4690 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4692 static const char *expected_syms1
[] = {
4696 SELF_CHECK (check_find_bounds_finds (mock_index
.index (),
4697 "\377", expected_syms1
));
4699 static const char *expected_syms2
[] = {
4702 SELF_CHECK (check_find_bounds_finds (mock_index
.index (),
4703 "\377\377", expected_syms2
));
4707 /* Test dw2_expand_symtabs_matching_symbol. */
4710 test_dw2_expand_symtabs_matching_symbol ()
4712 mock_mapped_index
mock_index (test_symbols
);
4714 /* We let all tests run until the end even if some fails, for debug
4716 bool any_mismatch
= false;
4718 /* Create the expected symbols list (an initializer_list). Needed
4719 because lists have commas, and we need to pass them to CHECK,
4720 which is a macro. */
4721 #define EXPECT(...) { __VA_ARGS__ }
4723 /* Wrapper for check_match that passes down the current
4724 __FILE__/__LINE__. */
4725 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4726 any_mismatch |= !check_match (__FILE__, __LINE__, \
4728 NAME, MATCH_TYPE, COMPLETION_MODE, \
4731 /* Identity checks. */
4732 for (const char *sym
: test_symbols
)
4734 /* Should be able to match all existing symbols. */
4735 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4738 /* Should be able to match all existing symbols with
4740 std::string with_params
= std::string (sym
) + "(int)";
4741 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4744 /* Should be able to match all existing symbols with
4745 parameters and qualifiers. */
4746 with_params
= std::string (sym
) + " ( int ) const";
4747 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4750 /* This should really find sym, but cp-name-parser.y doesn't
4751 know about lvalue/rvalue qualifiers yet. */
4752 with_params
= std::string (sym
) + " ( int ) &&";
4753 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4757 /* Check that the name matching algorithm for completion doesn't get
4758 confused with Latin1 'ÿ' / 0xff. */
4760 static const char str
[] = "\377";
4761 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4762 EXPECT ("\377", "\377\377123"));
4765 /* Check that the increment-last-char in the matching algorithm for
4766 completion doesn't match "t1_fund" when completing "t1_func". */
4768 static const char str
[] = "t1_func";
4769 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4770 EXPECT ("t1_func", "t1_func1"));
4773 /* Check that completion mode works at each prefix of the expected
4776 static const char str
[] = "function(int)";
4777 size_t len
= strlen (str
);
4780 for (size_t i
= 1; i
< len
; i
++)
4782 lookup
.assign (str
, i
);
4783 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4784 EXPECT ("function"));
4788 /* While "w" is a prefix of both components, the match function
4789 should still only be called once. */
4791 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4795 /* Same, with a "complicated" symbol. */
4797 static const char str
[] = Z_SYM_NAME
;
4798 size_t len
= strlen (str
);
4801 for (size_t i
= 1; i
< len
; i
++)
4803 lookup
.assign (str
, i
);
4804 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4805 EXPECT (Z_SYM_NAME
));
4809 /* In FULL mode, an incomplete symbol doesn't match. */
4811 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4815 /* A complete symbol with parameters matches any overload, since the
4816 index has no overload info. */
4818 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4819 EXPECT ("std::zfunction", "std::zfunction2"));
4822 /* Check that whitespace is ignored appropriately. A symbol with a
4823 template argument list. */
4825 static const char expected
[] = "ns::foo<int>";
4826 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4830 /* Check that whitespace is ignored appropriately. A symbol with a
4831 template argument list that includes a pointer. */
4833 static const char expected
[] = "ns::foo<char*>";
4834 /* Try both completion and non-completion modes. */
4835 static const bool completion_mode
[2] = {false, true};
4836 for (size_t i
= 0; i
< 2; i
++)
4838 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4839 completion_mode
[i
], EXPECT (expected
));
4841 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4842 completion_mode
[i
], EXPECT (expected
));
4847 /* Check method qualifiers are ignored. */
4848 static const char expected
[] = "ns::foo<char*>";
4849 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4850 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4851 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4852 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4855 /* Test lookup names that don't match anything. */
4857 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4861 SELF_CHECK (!any_mismatch
);
4870 test_mapped_index_find_name_component_bounds ();
4871 test_dw2_expand_symtabs_matching_symbol ();
4874 }} // namespace selftests::dw2_expand_symtabs_matching
4876 #endif /* GDB_SELF_TEST */
4878 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4879 matched, to expand corresponding CUs that were marked. IDX is the
4880 index of the symbol name that matched. */
4883 dw2_expand_marked_cus
4884 (mapped_index
&index
, offset_type idx
,
4885 struct objfile
*objfile
,
4886 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4887 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4891 offset_type
*vec
, vec_len
, vec_idx
;
4892 bool global_seen
= false;
4894 vec
= (offset_type
*) (index
.constant_pool
4895 + MAYBE_SWAP (index
.symbol_table
[idx
+ 1]));
4896 vec_len
= MAYBE_SWAP (vec
[0]);
4897 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4899 struct dwarf2_per_cu_data
*per_cu
;
4900 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4901 /* This value is only valid for index versions >= 7. */
4902 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4903 gdb_index_symbol_kind symbol_kind
=
4904 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4905 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4906 /* Only check the symbol attributes if they're present.
4907 Indices prior to version 7 don't record them,
4908 and indices >= 7 may elide them for certain symbols
4909 (gold does this). */
4912 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4914 /* Work around gold/15646. */
4917 if (!is_static
&& global_seen
)
4923 /* Only check the symbol's kind if it has one. */
4928 case VARIABLES_DOMAIN
:
4929 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4932 case FUNCTIONS_DOMAIN
:
4933 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4937 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4945 /* Don't crash on bad data. */
4946 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4947 + dwarf2_per_objfile
->n_type_units
))
4949 complaint (&symfile_complaints
,
4950 _(".gdb_index entry has bad CU index"
4951 " [in module %s]"), objfile_name (objfile
));
4955 per_cu
= dw2_get_cutu (cu_index
);
4956 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4958 int symtab_was_null
=
4959 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4961 dw2_instantiate_symtab (per_cu
);
4963 if (expansion_notify
!= NULL
4965 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4966 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4972 dw2_expand_symtabs_matching
4973 (struct objfile
*objfile
,
4974 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4975 const lookup_name_info
&lookup_name
,
4976 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4977 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4978 enum search_domain kind
)
4983 dw2_setup (objfile
);
4985 /* index_table is NULL if OBJF_READNOW. */
4986 if (!dwarf2_per_objfile
->index_table
)
4989 if (file_matcher
!= NULL
)
4991 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4993 NULL
, xcalloc
, xfree
));
4994 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4996 NULL
, xcalloc
, xfree
));
4998 /* The rule is CUs specify all the files, including those used by
4999 any TU, so there's no need to scan TUs here. */
5001 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5004 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5005 struct quick_file_names
*file_data
;
5010 per_cu
->v
.quick
->mark
= 0;
5012 /* We only need to look at symtabs not already expanded. */
5013 if (per_cu
->v
.quick
->compunit_symtab
)
5016 file_data
= dw2_get_file_names (per_cu
);
5017 if (file_data
== NULL
)
5020 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5022 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5024 per_cu
->v
.quick
->mark
= 1;
5028 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
5030 const char *this_real_name
;
5032 if (file_matcher (file_data
->file_names
[j
], false))
5034 per_cu
->v
.quick
->mark
= 1;
5038 /* Before we invoke realpath, which can get expensive when many
5039 files are involved, do a quick comparison of the basenames. */
5040 if (!basenames_may_differ
5041 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5045 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5046 if (file_matcher (this_real_name
, false))
5048 per_cu
->v
.quick
->mark
= 1;
5053 slot
= htab_find_slot (per_cu
->v
.quick
->mark
5054 ? visited_found
.get ()
5055 : visited_not_found
.get (),
5061 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5063 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5065 kind
, [&] (offset_type idx
)
5067 dw2_expand_marked_cus (index
, idx
, objfile
, file_matcher
,
5068 expansion_notify
, kind
);
5072 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5075 static struct compunit_symtab
*
5076 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5081 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5082 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5085 if (cust
->includes
== NULL
)
5088 for (i
= 0; cust
->includes
[i
]; ++i
)
5090 struct compunit_symtab
*s
= cust
->includes
[i
];
5092 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5100 static struct compunit_symtab
*
5101 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5102 struct bound_minimal_symbol msymbol
,
5104 struct obj_section
*section
,
5107 struct dwarf2_per_cu_data
*data
;
5108 struct compunit_symtab
*result
;
5110 dw2_setup (objfile
);
5112 if (!objfile
->psymtabs_addrmap
)
5115 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5120 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5121 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5122 paddress (get_objfile_arch (objfile
), pc
));
5125 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5127 gdb_assert (result
!= NULL
);
5132 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5133 void *data
, int need_fullname
)
5135 dw2_setup (objfile
);
5137 if (!dwarf2_per_objfile
->filenames_cache
)
5139 dwarf2_per_objfile
->filenames_cache
.emplace ();
5141 htab_up
visited (htab_create_alloc (10,
5142 htab_hash_pointer
, htab_eq_pointer
,
5143 NULL
, xcalloc
, xfree
));
5145 /* The rule is CUs specify all the files, including those used
5146 by any TU, so there's no need to scan TUs here. We can
5147 ignore file names coming from already-expanded CUs. */
5149 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5151 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
5153 if (per_cu
->v
.quick
->compunit_symtab
)
5155 void **slot
= htab_find_slot (visited
.get (),
5156 per_cu
->v
.quick
->file_names
,
5159 *slot
= per_cu
->v
.quick
->file_names
;
5163 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5166 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5167 struct quick_file_names
*file_data
;
5170 /* We only need to look at symtabs not already expanded. */
5171 if (per_cu
->v
.quick
->compunit_symtab
)
5174 file_data
= dw2_get_file_names (per_cu
);
5175 if (file_data
== NULL
)
5178 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5181 /* Already visited. */
5186 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5188 const char *filename
= file_data
->file_names
[j
];
5189 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5194 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5196 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5199 this_real_name
= gdb_realpath (filename
);
5200 (*fun
) (filename
, this_real_name
.get (), data
);
5205 dw2_has_symbols (struct objfile
*objfile
)
5210 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5213 dw2_find_last_source_symtab
,
5214 dw2_forget_cached_source_info
,
5215 dw2_map_symtabs_matching_filename
,
5220 dw2_expand_symtabs_for_function
,
5221 dw2_expand_all_symtabs
,
5222 dw2_expand_symtabs_with_fullname
,
5223 dw2_map_matching_symbols
,
5224 dw2_expand_symtabs_matching
,
5225 dw2_find_pc_sect_compunit_symtab
,
5227 dw2_map_symbol_filenames
5230 /* Initialize for reading DWARF for this objfile. Return 0 if this
5231 file will use psymtabs, or 1 if using the GNU index. */
5234 dwarf2_initialize_objfile (struct objfile
*objfile
)
5236 /* If we're about to read full symbols, don't bother with the
5237 indices. In this case we also don't care if some other debug
5238 format is making psymtabs, because they are all about to be
5240 if ((objfile
->flags
& OBJF_READNOW
))
5244 dwarf2_per_objfile
->using_index
= 1;
5245 create_all_comp_units (objfile
);
5246 create_all_type_units (objfile
);
5247 dwarf2_per_objfile
->quick_file_names_table
=
5248 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
5250 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
5251 + dwarf2_per_objfile
->n_type_units
); ++i
)
5253 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
5255 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5256 struct dwarf2_per_cu_quick_data
);
5259 /* Return 1 so that gdb sees the "quick" functions. However,
5260 these functions will be no-ops because we will have expanded
5265 if (dwarf2_read_index (objfile
))
5273 /* Build a partial symbol table. */
5276 dwarf2_build_psymtabs (struct objfile
*objfile
)
5279 if (objfile
->global_psymbols
.capacity () == 0
5280 && objfile
->static_psymbols
.capacity () == 0)
5281 init_psymbol_list (objfile
, 1024);
5285 /* This isn't really ideal: all the data we allocate on the
5286 objfile's obstack is still uselessly kept around. However,
5287 freeing it seems unsafe. */
5288 psymtab_discarder
psymtabs (objfile
);
5289 dwarf2_build_psymtabs_hard (objfile
);
5292 CATCH (except
, RETURN_MASK_ERROR
)
5294 exception_print (gdb_stderr
, except
);
5299 /* Return the total length of the CU described by HEADER. */
5302 get_cu_length (const struct comp_unit_head
*header
)
5304 return header
->initial_length_size
+ header
->length
;
5307 /* Return TRUE if SECT_OFF is within CU_HEADER. */
5310 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
5312 sect_offset bottom
= cu_header
->sect_off
;
5313 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
5315 return sect_off
>= bottom
&& sect_off
< top
;
5318 /* Find the base address of the compilation unit for range lists and
5319 location lists. It will normally be specified by DW_AT_low_pc.
5320 In DWARF-3 draft 4, the base address could be overridden by
5321 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5322 compilation units with discontinuous ranges. */
5325 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5327 struct attribute
*attr
;
5330 cu
->base_address
= 0;
5332 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5335 cu
->base_address
= attr_value_as_address (attr
);
5340 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5343 cu
->base_address
= attr_value_as_address (attr
);
5349 /* Read in the comp unit header information from the debug_info at info_ptr.
5350 Use rcuh_kind::COMPILE as the default type if not known by the caller.
5351 NOTE: This leaves members offset, first_die_offset to be filled in
5354 static const gdb_byte
*
5355 read_comp_unit_head (struct comp_unit_head
*cu_header
,
5356 const gdb_byte
*info_ptr
,
5357 struct dwarf2_section_info
*section
,
5358 rcuh_kind section_kind
)
5361 unsigned int bytes_read
;
5362 const char *filename
= get_section_file_name (section
);
5363 bfd
*abfd
= get_section_bfd_owner (section
);
5365 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
5366 cu_header
->initial_length_size
= bytes_read
;
5367 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
5368 info_ptr
+= bytes_read
;
5369 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
5371 if (cu_header
->version
< 5)
5372 switch (section_kind
)
5374 case rcuh_kind::COMPILE
:
5375 cu_header
->unit_type
= DW_UT_compile
;
5377 case rcuh_kind::TYPE
:
5378 cu_header
->unit_type
= DW_UT_type
;
5381 internal_error (__FILE__
, __LINE__
,
5382 _("read_comp_unit_head: invalid section_kind"));
5386 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
5387 (read_1_byte (abfd
, info_ptr
));
5389 switch (cu_header
->unit_type
)
5392 if (section_kind
!= rcuh_kind::COMPILE
)
5393 error (_("Dwarf Error: wrong unit_type in compilation unit header "
5394 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
5398 section_kind
= rcuh_kind::TYPE
;
5401 error (_("Dwarf Error: wrong unit_type in compilation unit header "
5402 "(is %d, should be %d or %d) [in module %s]"),
5403 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
5406 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
5409 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
5412 info_ptr
+= bytes_read
;
5413 if (cu_header
->version
< 5)
5415 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
5418 signed_addr
= bfd_get_sign_extend_vma (abfd
);
5419 if (signed_addr
< 0)
5420 internal_error (__FILE__
, __LINE__
,
5421 _("read_comp_unit_head: dwarf from non elf file"));
5422 cu_header
->signed_addr_p
= signed_addr
;
5424 if (section_kind
== rcuh_kind::TYPE
)
5426 LONGEST type_offset
;
5428 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
5431 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
5432 info_ptr
+= bytes_read
;
5433 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
5434 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
5435 error (_("Dwarf Error: Too big type_offset in compilation unit "
5436 "header (is %s) [in module %s]"), plongest (type_offset
),
5443 /* Helper function that returns the proper abbrev section for
5446 static struct dwarf2_section_info
*
5447 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5449 struct dwarf2_section_info
*abbrev
;
5451 if (this_cu
->is_dwz
)
5452 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
5454 abbrev
= &dwarf2_per_objfile
->abbrev
;
5459 /* Subroutine of read_and_check_comp_unit_head and
5460 read_and_check_type_unit_head to simplify them.
5461 Perform various error checking on the header. */
5464 error_check_comp_unit_head (struct comp_unit_head
*header
,
5465 struct dwarf2_section_info
*section
,
5466 struct dwarf2_section_info
*abbrev_section
)
5468 const char *filename
= get_section_file_name (section
);
5470 if (header
->version
< 2 || header
->version
> 5)
5471 error (_("Dwarf Error: wrong version in compilation unit header "
5472 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
5475 if (to_underlying (header
->abbrev_sect_off
)
5476 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
5477 error (_("Dwarf Error: bad offset (0x%x) in compilation unit header "
5478 "(offset 0x%x + 6) [in module %s]"),
5479 to_underlying (header
->abbrev_sect_off
),
5480 to_underlying (header
->sect_off
),
5483 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
5484 avoid potential 32-bit overflow. */
5485 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
5487 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
5488 "(offset 0x%x + 0) [in module %s]"),
5489 header
->length
, to_underlying (header
->sect_off
),
5493 /* Read in a CU/TU header and perform some basic error checking.
5494 The contents of the header are stored in HEADER.
5495 The result is a pointer to the start of the first DIE. */
5497 static const gdb_byte
*
5498 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
5499 struct dwarf2_section_info
*section
,
5500 struct dwarf2_section_info
*abbrev_section
,
5501 const gdb_byte
*info_ptr
,
5502 rcuh_kind section_kind
)
5504 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
5505 bfd
*abfd
= get_section_bfd_owner (section
);
5507 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
5509 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
5511 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
5513 error_check_comp_unit_head (header
, section
, abbrev_section
);
5518 /* Fetch the abbreviation table offset from a comp or type unit header. */
5521 read_abbrev_offset (struct dwarf2_section_info
*section
,
5522 sect_offset sect_off
)
5524 bfd
*abfd
= get_section_bfd_owner (section
);
5525 const gdb_byte
*info_ptr
;
5526 unsigned int initial_length_size
, offset_size
;
5529 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
5530 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5531 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5532 offset_size
= initial_length_size
== 4 ? 4 : 8;
5533 info_ptr
+= initial_length_size
;
5535 version
= read_2_bytes (abfd
, info_ptr
);
5539 /* Skip unit type and address size. */
5543 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
5546 /* Allocate a new partial symtab for file named NAME and mark this new
5547 partial symtab as being an include of PST. */
5550 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
5551 struct objfile
*objfile
)
5553 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
5555 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
5557 /* It shares objfile->objfile_obstack. */
5558 subpst
->dirname
= pst
->dirname
;
5561 subpst
->textlow
= 0;
5562 subpst
->texthigh
= 0;
5564 subpst
->dependencies
5565 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
5566 subpst
->dependencies
[0] = pst
;
5567 subpst
->number_of_dependencies
= 1;
5569 subpst
->globals_offset
= 0;
5570 subpst
->n_global_syms
= 0;
5571 subpst
->statics_offset
= 0;
5572 subpst
->n_static_syms
= 0;
5573 subpst
->compunit_symtab
= NULL
;
5574 subpst
->read_symtab
= pst
->read_symtab
;
5577 /* No private part is necessary for include psymtabs. This property
5578 can be used to differentiate between such include psymtabs and
5579 the regular ones. */
5580 subpst
->read_symtab_private
= NULL
;
5583 /* Read the Line Number Program data and extract the list of files
5584 included by the source file represented by PST. Build an include
5585 partial symtab for each of these included files. */
5588 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
5589 struct die_info
*die
,
5590 struct partial_symtab
*pst
)
5593 struct attribute
*attr
;
5595 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5597 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
5599 return; /* No linetable, so no includes. */
5601 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
5602 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
5606 hash_signatured_type (const void *item
)
5608 const struct signatured_type
*sig_type
5609 = (const struct signatured_type
*) item
;
5611 /* This drops the top 32 bits of the signature, but is ok for a hash. */
5612 return sig_type
->signature
;
5616 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
5618 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
5619 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
5621 return lhs
->signature
== rhs
->signature
;
5624 /* Allocate a hash table for signatured types. */
5627 allocate_signatured_type_table (struct objfile
*objfile
)
5629 return htab_create_alloc_ex (41,
5630 hash_signatured_type
,
5633 &objfile
->objfile_obstack
,
5634 hashtab_obstack_allocate
,
5635 dummy_obstack_deallocate
);
5638 /* A helper function to add a signatured type CU to a table. */
5641 add_signatured_type_cu_to_table (void **slot
, void *datum
)
5643 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
5644 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
5652 /* A helper for create_debug_types_hash_table. Read types from SECTION
5653 and fill them into TYPES_HTAB. It will process only type units,
5654 therefore DW_UT_type. */
5657 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
5658 dwarf2_section_info
*section
, htab_t
&types_htab
,
5659 rcuh_kind section_kind
)
5661 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5662 struct dwarf2_section_info
*abbrev_section
;
5664 const gdb_byte
*info_ptr
, *end_ptr
;
5666 abbrev_section
= (dwo_file
!= NULL
5667 ? &dwo_file
->sections
.abbrev
5668 : &dwarf2_per_objfile
->abbrev
);
5670 if (dwarf_read_debug
)
5671 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
5672 get_section_name (section
),
5673 get_section_file_name (abbrev_section
));
5675 dwarf2_read_section (objfile
, section
);
5676 info_ptr
= section
->buffer
;
5678 if (info_ptr
== NULL
)
5681 /* We can't set abfd until now because the section may be empty or
5682 not present, in which case the bfd is unknown. */
5683 abfd
= get_section_bfd_owner (section
);
5685 /* We don't use init_cutu_and_read_dies_simple, or some such, here
5686 because we don't need to read any dies: the signature is in the
5689 end_ptr
= info_ptr
+ section
->size
;
5690 while (info_ptr
< end_ptr
)
5692 struct signatured_type
*sig_type
;
5693 struct dwo_unit
*dwo_tu
;
5695 const gdb_byte
*ptr
= info_ptr
;
5696 struct comp_unit_head header
;
5697 unsigned int length
;
5699 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
5701 /* Initialize it due to a false compiler warning. */
5702 header
.signature
= -1;
5703 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
5705 /* We need to read the type's signature in order to build the hash
5706 table, but we don't need anything else just yet. */
5708 ptr
= read_and_check_comp_unit_head (&header
, section
,
5709 abbrev_section
, ptr
, section_kind
);
5711 length
= get_cu_length (&header
);
5713 /* Skip dummy type units. */
5714 if (ptr
>= info_ptr
+ length
5715 || peek_abbrev_code (abfd
, ptr
) == 0
5716 || header
.unit_type
!= DW_UT_type
)
5722 if (types_htab
== NULL
)
5725 types_htab
= allocate_dwo_unit_table (objfile
);
5727 types_htab
= allocate_signatured_type_table (objfile
);
5733 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5735 dwo_tu
->dwo_file
= dwo_file
;
5736 dwo_tu
->signature
= header
.signature
;
5737 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
5738 dwo_tu
->section
= section
;
5739 dwo_tu
->sect_off
= sect_off
;
5740 dwo_tu
->length
= length
;
5744 /* N.B.: type_offset is not usable if this type uses a DWO file.
5745 The real type_offset is in the DWO file. */
5747 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5748 struct signatured_type
);
5749 sig_type
->signature
= header
.signature
;
5750 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
5751 sig_type
->per_cu
.objfile
= objfile
;
5752 sig_type
->per_cu
.is_debug_types
= 1;
5753 sig_type
->per_cu
.section
= section
;
5754 sig_type
->per_cu
.sect_off
= sect_off
;
5755 sig_type
->per_cu
.length
= length
;
5758 slot
= htab_find_slot (types_htab
,
5759 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
5761 gdb_assert (slot
!= NULL
);
5764 sect_offset dup_sect_off
;
5768 const struct dwo_unit
*dup_tu
5769 = (const struct dwo_unit
*) *slot
;
5771 dup_sect_off
= dup_tu
->sect_off
;
5775 const struct signatured_type
*dup_tu
5776 = (const struct signatured_type
*) *slot
;
5778 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
5781 complaint (&symfile_complaints
,
5782 _("debug type entry at offset 0x%x is duplicate to"
5783 " the entry at offset 0x%x, signature %s"),
5784 to_underlying (sect_off
), to_underlying (dup_sect_off
),
5785 hex_string (header
.signature
));
5787 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
5789 if (dwarf_read_debug
> 1)
5790 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
5791 to_underlying (sect_off
),
5792 hex_string (header
.signature
));
5798 /* Create the hash table of all entries in the .debug_types
5799 (or .debug_types.dwo) section(s).
5800 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
5801 otherwise it is NULL.
5803 The result is a pointer to the hash table or NULL if there are no types.
5805 Note: This function processes DWO files only, not DWP files. */
5808 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
5809 VEC (dwarf2_section_info_def
) *types
,
5813 struct dwarf2_section_info
*section
;
5815 if (VEC_empty (dwarf2_section_info_def
, types
))
5819 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
5821 create_debug_type_hash_table (dwo_file
, section
, types_htab
,
5825 /* Create the hash table of all entries in the .debug_types section,
5826 and initialize all_type_units.
5827 The result is zero if there is an error (e.g. missing .debug_types section),
5828 otherwise non-zero. */
5831 create_all_type_units (struct objfile
*objfile
)
5833 htab_t types_htab
= NULL
;
5834 struct signatured_type
**iter
;
5836 create_debug_type_hash_table (NULL
, &dwarf2_per_objfile
->info
, types_htab
,
5837 rcuh_kind::COMPILE
);
5838 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
5839 if (types_htab
== NULL
)
5841 dwarf2_per_objfile
->signatured_types
= NULL
;
5845 dwarf2_per_objfile
->signatured_types
= types_htab
;
5847 dwarf2_per_objfile
->n_type_units
5848 = dwarf2_per_objfile
->n_allocated_type_units
5849 = htab_elements (types_htab
);
5850 dwarf2_per_objfile
->all_type_units
=
5851 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
5852 iter
= &dwarf2_per_objfile
->all_type_units
[0];
5853 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
5854 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
5855 == dwarf2_per_objfile
->n_type_units
);
5860 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
5861 If SLOT is non-NULL, it is the entry to use in the hash table.
5862 Otherwise we find one. */
5864 static struct signatured_type
*
5865 add_type_unit (ULONGEST sig
, void **slot
)
5867 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5868 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
5869 struct signatured_type
*sig_type
;
5871 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
5873 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
5875 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
5876 dwarf2_per_objfile
->n_allocated_type_units
= 1;
5877 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
5878 dwarf2_per_objfile
->all_type_units
5879 = XRESIZEVEC (struct signatured_type
*,
5880 dwarf2_per_objfile
->all_type_units
,
5881 dwarf2_per_objfile
->n_allocated_type_units
);
5882 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
5884 dwarf2_per_objfile
->n_type_units
= n_type_units
;
5886 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5887 struct signatured_type
);
5888 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
5889 sig_type
->signature
= sig
;
5890 sig_type
->per_cu
.is_debug_types
= 1;
5891 if (dwarf2_per_objfile
->using_index
)
5893 sig_type
->per_cu
.v
.quick
=
5894 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5895 struct dwarf2_per_cu_quick_data
);
5900 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5903 gdb_assert (*slot
== NULL
);
5905 /* The rest of sig_type must be filled in by the caller. */
5909 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
5910 Fill in SIG_ENTRY with DWO_ENTRY. */
5913 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
5914 struct signatured_type
*sig_entry
,
5915 struct dwo_unit
*dwo_entry
)
5917 /* Make sure we're not clobbering something we don't expect to. */
5918 gdb_assert (! sig_entry
->per_cu
.queued
);
5919 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
5920 if (dwarf2_per_objfile
->using_index
)
5922 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
5923 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
5926 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
5927 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
5928 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
5929 gdb_assert (sig_entry
->type_unit_group
== NULL
);
5930 gdb_assert (sig_entry
->dwo_unit
== NULL
);
5932 sig_entry
->per_cu
.section
= dwo_entry
->section
;
5933 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
5934 sig_entry
->per_cu
.length
= dwo_entry
->length
;
5935 sig_entry
->per_cu
.reading_dwo_directly
= 1;
5936 sig_entry
->per_cu
.objfile
= objfile
;
5937 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
5938 sig_entry
->dwo_unit
= dwo_entry
;
5941 /* Subroutine of lookup_signatured_type.
5942 If we haven't read the TU yet, create the signatured_type data structure
5943 for a TU to be read in directly from a DWO file, bypassing the stub.
5944 This is the "Stay in DWO Optimization": When there is no DWP file and we're
5945 using .gdb_index, then when reading a CU we want to stay in the DWO file
5946 containing that CU. Otherwise we could end up reading several other DWO
5947 files (due to comdat folding) to process the transitive closure of all the
5948 mentioned TUs, and that can be slow. The current DWO file will have every
5949 type signature that it needs.
5950 We only do this for .gdb_index because in the psymtab case we already have
5951 to read all the DWOs to build the type unit groups. */
5953 static struct signatured_type
*
5954 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5956 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5957 struct dwo_file
*dwo_file
;
5958 struct dwo_unit find_dwo_entry
, *dwo_entry
;
5959 struct signatured_type find_sig_entry
, *sig_entry
;
5962 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5964 /* If TU skeletons have been removed then we may not have read in any
5966 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5968 dwarf2_per_objfile
->signatured_types
5969 = allocate_signatured_type_table (objfile
);
5972 /* We only ever need to read in one copy of a signatured type.
5973 Use the global signatured_types array to do our own comdat-folding
5974 of types. If this is the first time we're reading this TU, and
5975 the TU has an entry in .gdb_index, replace the recorded data from
5976 .gdb_index with this TU. */
5978 find_sig_entry
.signature
= sig
;
5979 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5980 &find_sig_entry
, INSERT
);
5981 sig_entry
= (struct signatured_type
*) *slot
;
5983 /* We can get here with the TU already read, *or* in the process of being
5984 read. Don't reassign the global entry to point to this DWO if that's
5985 the case. Also note that if the TU is already being read, it may not
5986 have come from a DWO, the program may be a mix of Fission-compiled
5987 code and non-Fission-compiled code. */
5989 /* Have we already tried to read this TU?
5990 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5991 needn't exist in the global table yet). */
5992 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
5995 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
5996 dwo_unit of the TU itself. */
5997 dwo_file
= cu
->dwo_unit
->dwo_file
;
5999 /* Ok, this is the first time we're reading this TU. */
6000 if (dwo_file
->tus
== NULL
)
6002 find_dwo_entry
.signature
= sig
;
6003 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6004 if (dwo_entry
== NULL
)
6007 /* If the global table doesn't have an entry for this TU, add one. */
6008 if (sig_entry
== NULL
)
6009 sig_entry
= add_type_unit (sig
, slot
);
6011 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
6012 sig_entry
->per_cu
.tu_read
= 1;
6016 /* Subroutine of lookup_signatured_type.
6017 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6018 then try the DWP file. If the TU stub (skeleton) has been removed then
6019 it won't be in .gdb_index. */
6021 static struct signatured_type
*
6022 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6024 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6025 struct dwp_file
*dwp_file
= get_dwp_file ();
6026 struct dwo_unit
*dwo_entry
;
6027 struct signatured_type find_sig_entry
, *sig_entry
;
6030 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6031 gdb_assert (dwp_file
!= NULL
);
6033 /* If TU skeletons have been removed then we may not have read in any
6035 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6037 dwarf2_per_objfile
->signatured_types
6038 = allocate_signatured_type_table (objfile
);
6041 find_sig_entry
.signature
= sig
;
6042 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6043 &find_sig_entry
, INSERT
);
6044 sig_entry
= (struct signatured_type
*) *slot
;
6046 /* Have we already tried to read this TU?
6047 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6048 needn't exist in the global table yet). */
6049 if (sig_entry
!= NULL
)
6052 if (dwp_file
->tus
== NULL
)
6054 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
6055 sig
, 1 /* is_debug_types */);
6056 if (dwo_entry
== NULL
)
6059 sig_entry
= add_type_unit (sig
, slot
);
6060 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
6065 /* Lookup a signature based type for DW_FORM_ref_sig8.
6066 Returns NULL if signature SIG is not present in the table.
6067 It is up to the caller to complain about this. */
6069 static struct signatured_type
*
6070 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6073 && dwarf2_per_objfile
->using_index
)
6075 /* We're in a DWO/DWP file, and we're using .gdb_index.
6076 These cases require special processing. */
6077 if (get_dwp_file () == NULL
)
6078 return lookup_dwo_signatured_type (cu
, sig
);
6080 return lookup_dwp_signatured_type (cu
, sig
);
6084 struct signatured_type find_entry
, *entry
;
6086 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6088 find_entry
.signature
= sig
;
6089 entry
= ((struct signatured_type
*)
6090 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
6095 /* Low level DIE reading support. */
6097 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6100 init_cu_die_reader (struct die_reader_specs
*reader
,
6101 struct dwarf2_cu
*cu
,
6102 struct dwarf2_section_info
*section
,
6103 struct dwo_file
*dwo_file
)
6105 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6106 reader
->abfd
= get_section_bfd_owner (section
);
6108 reader
->dwo_file
= dwo_file
;
6109 reader
->die_section
= section
;
6110 reader
->buffer
= section
->buffer
;
6111 reader
->buffer_end
= section
->buffer
+ section
->size
;
6112 reader
->comp_dir
= NULL
;
6115 /* Subroutine of init_cutu_and_read_dies to simplify it.
6116 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6117 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
6120 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6121 from it to the DIE in the DWO. If NULL we are skipping the stub.
6122 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6123 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6124 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6125 STUB_COMP_DIR may be non-NULL.
6126 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
6127 are filled in with the info of the DIE from the DWO file.
6128 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
6129 provided an abbrev table to use.
6130 The result is non-zero if a valid (non-dummy) DIE was found. */
6133 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6134 struct dwo_unit
*dwo_unit
,
6135 int abbrev_table_provided
,
6136 struct die_info
*stub_comp_unit_die
,
6137 const char *stub_comp_dir
,
6138 struct die_reader_specs
*result_reader
,
6139 const gdb_byte
**result_info_ptr
,
6140 struct die_info
**result_comp_unit_die
,
6141 int *result_has_children
)
6143 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6144 struct dwarf2_cu
*cu
= this_cu
->cu
;
6145 struct dwarf2_section_info
*section
;
6147 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6148 ULONGEST signature
; /* Or dwo_id. */
6149 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6150 int i
,num_extra_attrs
;
6151 struct dwarf2_section_info
*dwo_abbrev_section
;
6152 struct attribute
*attr
;
6153 struct die_info
*comp_unit_die
;
6155 /* At most one of these may be provided. */
6156 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6158 /* These attributes aren't processed until later:
6159 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6160 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6161 referenced later. However, these attributes are found in the stub
6162 which we won't have later. In order to not impose this complication
6163 on the rest of the code, we read them here and copy them to the
6172 if (stub_comp_unit_die
!= NULL
)
6174 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6176 if (! this_cu
->is_debug_types
)
6177 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6178 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6179 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6180 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6181 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6183 /* There should be a DW_AT_addr_base attribute here (if needed).
6184 We need the value before we can process DW_FORM_GNU_addr_index. */
6186 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
6188 cu
->addr_base
= DW_UNSND (attr
);
6190 /* There should be a DW_AT_ranges_base attribute here (if needed).
6191 We need the value before we can process DW_AT_ranges. */
6192 cu
->ranges_base
= 0;
6193 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
6195 cu
->ranges_base
= DW_UNSND (attr
);
6197 else if (stub_comp_dir
!= NULL
)
6199 /* Reconstruct the comp_dir attribute to simplify the code below. */
6200 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6201 comp_dir
->name
= DW_AT_comp_dir
;
6202 comp_dir
->form
= DW_FORM_string
;
6203 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6204 DW_STRING (comp_dir
) = stub_comp_dir
;
6207 /* Set up for reading the DWO CU/TU. */
6208 cu
->dwo_unit
= dwo_unit
;
6209 section
= dwo_unit
->section
;
6210 dwarf2_read_section (objfile
, section
);
6211 abfd
= get_section_bfd_owner (section
);
6212 begin_info_ptr
= info_ptr
= (section
->buffer
6213 + to_underlying (dwo_unit
->sect_off
));
6214 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6215 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
6217 if (this_cu
->is_debug_types
)
6219 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6221 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6223 info_ptr
, rcuh_kind::TYPE
);
6224 /* This is not an assert because it can be caused by bad debug info. */
6225 if (sig_type
->signature
!= cu
->header
.signature
)
6227 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6228 " TU at offset 0x%x [in module %s]"),
6229 hex_string (sig_type
->signature
),
6230 hex_string (cu
->header
.signature
),
6231 to_underlying (dwo_unit
->sect_off
),
6232 bfd_get_filename (abfd
));
6234 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6235 /* For DWOs coming from DWP files, we don't know the CU length
6236 nor the type's offset in the TU until now. */
6237 dwo_unit
->length
= get_cu_length (&cu
->header
);
6238 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6240 /* Establish the type offset that can be used to lookup the type.
6241 For DWO files, we don't know it until now. */
6242 sig_type
->type_offset_in_section
6243 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6247 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6249 info_ptr
, rcuh_kind::COMPILE
);
6250 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6251 /* For DWOs coming from DWP files, we don't know the CU length
6253 dwo_unit
->length
= get_cu_length (&cu
->header
);
6256 /* Replace the CU's original abbrev table with the DWO's.
6257 Reminder: We can't read the abbrev table until we've read the header. */
6258 if (abbrev_table_provided
)
6260 /* Don't free the provided abbrev table, the caller of
6261 init_cutu_and_read_dies owns it. */
6262 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
6263 /* Ensure the DWO abbrev table gets freed. */
6264 make_cleanup (dwarf2_free_abbrev_table
, cu
);
6268 dwarf2_free_abbrev_table (cu
);
6269 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
6270 /* Leave any existing abbrev table cleanup as is. */
6273 /* Read in the die, but leave space to copy over the attributes
6274 from the stub. This has the benefit of simplifying the rest of
6275 the code - all the work to maintain the illusion of a single
6276 DW_TAG_{compile,type}_unit DIE is done here. */
6277 num_extra_attrs
= ((stmt_list
!= NULL
)
6281 + (comp_dir
!= NULL
));
6282 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6283 result_has_children
, num_extra_attrs
);
6285 /* Copy over the attributes from the stub to the DIE we just read in. */
6286 comp_unit_die
= *result_comp_unit_die
;
6287 i
= comp_unit_die
->num_attrs
;
6288 if (stmt_list
!= NULL
)
6289 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6291 comp_unit_die
->attrs
[i
++] = *low_pc
;
6292 if (high_pc
!= NULL
)
6293 comp_unit_die
->attrs
[i
++] = *high_pc
;
6295 comp_unit_die
->attrs
[i
++] = *ranges
;
6296 if (comp_dir
!= NULL
)
6297 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6298 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6300 if (dwarf_die_debug
)
6302 fprintf_unfiltered (gdb_stdlog
,
6303 "Read die from %s@0x%x of %s:\n",
6304 get_section_name (section
),
6305 (unsigned) (begin_info_ptr
- section
->buffer
),
6306 bfd_get_filename (abfd
));
6307 dump_die (comp_unit_die
, dwarf_die_debug
);
6310 /* Save the comp_dir attribute. If there is no DWP file then we'll read
6311 TUs by skipping the stub and going directly to the entry in the DWO file.
6312 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
6313 to get it via circuitous means. Blech. */
6314 if (comp_dir
!= NULL
)
6315 result_reader
->comp_dir
= DW_STRING (comp_dir
);
6317 /* Skip dummy compilation units. */
6318 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6319 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6322 *result_info_ptr
= info_ptr
;
6326 /* Subroutine of init_cutu_and_read_dies to simplify it.
6327 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6328 Returns NULL if the specified DWO unit cannot be found. */
6330 static struct dwo_unit
*
6331 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6332 struct die_info
*comp_unit_die
)
6334 struct dwarf2_cu
*cu
= this_cu
->cu
;
6335 struct attribute
*attr
;
6337 struct dwo_unit
*dwo_unit
;
6338 const char *comp_dir
, *dwo_name
;
6340 gdb_assert (cu
!= NULL
);
6342 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6343 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
6344 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6346 if (this_cu
->is_debug_types
)
6348 struct signatured_type
*sig_type
;
6350 /* Since this_cu is the first member of struct signatured_type,
6351 we can go from a pointer to one to a pointer to the other. */
6352 sig_type
= (struct signatured_type
*) this_cu
;
6353 signature
= sig_type
->signature
;
6354 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6358 struct attribute
*attr
;
6360 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6362 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6364 dwo_name
, objfile_name (this_cu
->objfile
));
6365 signature
= DW_UNSND (attr
);
6366 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6373 /* Subroutine of init_cutu_and_read_dies to simplify it.
6374 See it for a description of the parameters.
6375 Read a TU directly from a DWO file, bypassing the stub.
6377 Note: This function could be a little bit simpler if we shared cleanups
6378 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
6379 to do, so we keep this function self-contained. Or we could move this
6380 into our caller, but it's complex enough already. */
6383 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6384 int use_existing_cu
, int keep
,
6385 die_reader_func_ftype
*die_reader_func
,
6388 struct dwarf2_cu
*cu
;
6389 struct signatured_type
*sig_type
;
6390 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
6391 struct die_reader_specs reader
;
6392 const gdb_byte
*info_ptr
;
6393 struct die_info
*comp_unit_die
;
6396 /* Verify we can do the following downcast, and that we have the
6398 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6399 sig_type
= (struct signatured_type
*) this_cu
;
6400 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6402 cleanups
= make_cleanup (null_cleanup
, NULL
);
6404 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6406 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6408 /* There's no need to do the rereading_dwo_cu handling that
6409 init_cutu_and_read_dies does since we don't read the stub. */
6413 /* If !use_existing_cu, this_cu->cu must be NULL. */
6414 gdb_assert (this_cu
->cu
== NULL
);
6415 cu
= XNEW (struct dwarf2_cu
);
6416 init_one_comp_unit (cu
, this_cu
);
6417 /* If an error occurs while loading, release our storage. */
6418 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
6421 /* A future optimization, if needed, would be to use an existing
6422 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6423 could share abbrev tables. */
6425 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6426 0 /* abbrev_table_provided */,
6427 NULL
/* stub_comp_unit_die */,
6428 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6430 &comp_unit_die
, &has_children
) == 0)
6433 do_cleanups (cleanups
);
6437 /* All the "real" work is done here. */
6438 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6440 /* This duplicates the code in init_cutu_and_read_dies,
6441 but the alternative is making the latter more complex.
6442 This function is only for the special case of using DWO files directly:
6443 no point in overly complicating the general case just to handle this. */
6444 if (free_cu_cleanup
!= NULL
)
6448 /* We've successfully allocated this compilation unit. Let our
6449 caller clean it up when finished with it. */
6450 discard_cleanups (free_cu_cleanup
);
6452 /* We can only discard free_cu_cleanup and all subsequent cleanups.
6453 So we have to manually free the abbrev table. */
6454 dwarf2_free_abbrev_table (cu
);
6456 /* Link this CU into read_in_chain. */
6457 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6458 dwarf2_per_objfile
->read_in_chain
= this_cu
;
6461 do_cleanups (free_cu_cleanup
);
6464 do_cleanups (cleanups
);
6467 /* Initialize a CU (or TU) and read its DIEs.
6468 If the CU defers to a DWO file, read the DWO file as well.
6470 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6471 Otherwise the table specified in the comp unit header is read in and used.
6472 This is an optimization for when we already have the abbrev table.
6474 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6475 Otherwise, a new CU is allocated with xmalloc.
6477 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
6478 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
6480 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
6481 linker) then DIE_READER_FUNC will not get called. */
6484 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
6485 struct abbrev_table
*abbrev_table
,
6486 int use_existing_cu
, int keep
,
6487 die_reader_func_ftype
*die_reader_func
,
6490 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6491 struct dwarf2_section_info
*section
= this_cu
->section
;
6492 bfd
*abfd
= get_section_bfd_owner (section
);
6493 struct dwarf2_cu
*cu
;
6494 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6495 struct die_reader_specs reader
;
6496 struct die_info
*comp_unit_die
;
6498 struct attribute
*attr
;
6499 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
6500 struct signatured_type
*sig_type
= NULL
;
6501 struct dwarf2_section_info
*abbrev_section
;
6502 /* Non-zero if CU currently points to a DWO file and we need to
6503 reread it. When this happens we need to reread the skeleton die
6504 before we can reread the DWO file (this only applies to CUs, not TUs). */
6505 int rereading_dwo_cu
= 0;
6507 if (dwarf_die_debug
)
6508 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
6509 this_cu
->is_debug_types
? "type" : "comp",
6510 to_underlying (this_cu
->sect_off
));
6512 if (use_existing_cu
)
6515 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6516 file (instead of going through the stub), short-circuit all of this. */
6517 if (this_cu
->reading_dwo_directly
)
6519 /* Narrow down the scope of possibilities to have to understand. */
6520 gdb_assert (this_cu
->is_debug_types
);
6521 gdb_assert (abbrev_table
== NULL
);
6522 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
6523 die_reader_func
, data
);
6527 cleanups
= make_cleanup (null_cleanup
, NULL
);
6529 /* This is cheap if the section is already read in. */
6530 dwarf2_read_section (objfile
, section
);
6532 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6534 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6536 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6539 /* If this CU is from a DWO file we need to start over, we need to
6540 refetch the attributes from the skeleton CU.
6541 This could be optimized by retrieving those attributes from when we
6542 were here the first time: the previous comp_unit_die was stored in
6543 comp_unit_obstack. But there's no data yet that we need this
6545 if (cu
->dwo_unit
!= NULL
)
6546 rereading_dwo_cu
= 1;
6550 /* If !use_existing_cu, this_cu->cu must be NULL. */
6551 gdb_assert (this_cu
->cu
== NULL
);
6552 cu
= XNEW (struct dwarf2_cu
);
6553 init_one_comp_unit (cu
, this_cu
);
6554 /* If an error occurs while loading, release our storage. */
6555 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
6558 /* Get the header. */
6559 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6561 /* We already have the header, there's no need to read it in again. */
6562 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6566 if (this_cu
->is_debug_types
)
6568 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6569 abbrev_section
, info_ptr
,
6572 /* Since per_cu is the first member of struct signatured_type,
6573 we can go from a pointer to one to a pointer to the other. */
6574 sig_type
= (struct signatured_type
*) this_cu
;
6575 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6576 gdb_assert (sig_type
->type_offset_in_tu
6577 == cu
->header
.type_cu_offset_in_tu
);
6578 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6580 /* LENGTH has not been set yet for type units if we're
6581 using .gdb_index. */
6582 this_cu
->length
= get_cu_length (&cu
->header
);
6584 /* Establish the type offset that can be used to lookup the type. */
6585 sig_type
->type_offset_in_section
=
6586 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6588 this_cu
->dwarf_version
= cu
->header
.version
;
6592 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6595 rcuh_kind::COMPILE
);
6597 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6598 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
6599 this_cu
->dwarf_version
= cu
->header
.version
;
6603 /* Skip dummy compilation units. */
6604 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6605 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6607 do_cleanups (cleanups
);
6611 /* If we don't have them yet, read the abbrevs for this compilation unit.
6612 And if we need to read them now, make sure they're freed when we're
6613 done. Note that it's important that if the CU had an abbrev table
6614 on entry we don't free it when we're done: Somewhere up the call stack
6615 it may be in use. */
6616 if (abbrev_table
!= NULL
)
6618 gdb_assert (cu
->abbrev_table
== NULL
);
6619 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6620 cu
->abbrev_table
= abbrev_table
;
6622 else if (cu
->abbrev_table
== NULL
)
6624 dwarf2_read_abbrevs (cu
, abbrev_section
);
6625 make_cleanup (dwarf2_free_abbrev_table
, cu
);
6627 else if (rereading_dwo_cu
)
6629 dwarf2_free_abbrev_table (cu
);
6630 dwarf2_read_abbrevs (cu
, abbrev_section
);
6633 /* Read the top level CU/TU die. */
6634 init_cu_die_reader (&reader
, cu
, section
, NULL
);
6635 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
6637 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6639 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6640 DWO CU, that this test will fail (the attribute will not be present). */
6641 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
6644 struct dwo_unit
*dwo_unit
;
6645 struct die_info
*dwo_comp_unit_die
;
6649 complaint (&symfile_complaints
,
6650 _("compilation unit with DW_AT_GNU_dwo_name"
6651 " has children (offset 0x%x) [in module %s]"),
6652 to_underlying (this_cu
->sect_off
), bfd_get_filename (abfd
));
6654 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
6655 if (dwo_unit
!= NULL
)
6657 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6658 abbrev_table
!= NULL
,
6659 comp_unit_die
, NULL
,
6661 &dwo_comp_unit_die
, &has_children
) == 0)
6664 do_cleanups (cleanups
);
6667 comp_unit_die
= dwo_comp_unit_die
;
6671 /* Yikes, we couldn't find the rest of the DIE, we only have
6672 the stub. A complaint has already been logged. There's
6673 not much more we can do except pass on the stub DIE to
6674 die_reader_func. We don't want to throw an error on bad
6679 /* All of the above is setup for this call. Yikes. */
6680 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6682 /* Done, clean up. */
6683 if (free_cu_cleanup
!= NULL
)
6687 /* We've successfully allocated this compilation unit. Let our
6688 caller clean it up when finished with it. */
6689 discard_cleanups (free_cu_cleanup
);
6691 /* We can only discard free_cu_cleanup and all subsequent cleanups.
6692 So we have to manually free the abbrev table. */
6693 dwarf2_free_abbrev_table (cu
);
6695 /* Link this CU into read_in_chain. */
6696 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6697 dwarf2_per_objfile
->read_in_chain
= this_cu
;
6700 do_cleanups (free_cu_cleanup
);
6703 do_cleanups (cleanups
);
6706 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
6707 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
6708 to have already done the lookup to find the DWO file).
6710 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
6711 THIS_CU->is_debug_types, but nothing else.
6713 We fill in THIS_CU->length.
6715 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
6716 linker) then DIE_READER_FUNC will not get called.
6718 THIS_CU->cu is always freed when done.
6719 This is done in order to not leave THIS_CU->cu in a state where we have
6720 to care whether it refers to the "main" CU or the DWO CU. */
6723 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
6724 struct dwo_file
*dwo_file
,
6725 die_reader_func_ftype
*die_reader_func
,
6728 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6729 struct dwarf2_section_info
*section
= this_cu
->section
;
6730 bfd
*abfd
= get_section_bfd_owner (section
);
6731 struct dwarf2_section_info
*abbrev_section
;
6732 struct dwarf2_cu cu
;
6733 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6734 struct die_reader_specs reader
;
6735 struct cleanup
*cleanups
;
6736 struct die_info
*comp_unit_die
;
6739 if (dwarf_die_debug
)
6740 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
6741 this_cu
->is_debug_types
? "type" : "comp",
6742 to_underlying (this_cu
->sect_off
));
6744 gdb_assert (this_cu
->cu
== NULL
);
6746 abbrev_section
= (dwo_file
!= NULL
6747 ? &dwo_file
->sections
.abbrev
6748 : get_abbrev_section_for_cu (this_cu
));
6750 /* This is cheap if the section is already read in. */
6751 dwarf2_read_section (objfile
, section
);
6753 init_one_comp_unit (&cu
, this_cu
);
6755 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
6757 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6758 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
6759 abbrev_section
, info_ptr
,
6760 (this_cu
->is_debug_types
6762 : rcuh_kind::COMPILE
));
6764 this_cu
->length
= get_cu_length (&cu
.header
);
6766 /* Skip dummy compilation units. */
6767 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6768 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6770 do_cleanups (cleanups
);
6774 dwarf2_read_abbrevs (&cu
, abbrev_section
);
6775 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
6777 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
6778 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
6780 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6782 do_cleanups (cleanups
);
6785 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
6786 does not lookup the specified DWO file.
6787 This cannot be used to read DWO files.
6789 THIS_CU->cu is always freed when done.
6790 This is done in order to not leave THIS_CU->cu in a state where we have
6791 to care whether it refers to the "main" CU or the DWO CU.
6792 We can revisit this if the data shows there's a performance issue. */
6795 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
6796 die_reader_func_ftype
*die_reader_func
,
6799 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
6802 /* Type Unit Groups.
6804 Type Unit Groups are a way to collapse the set of all TUs (type units) into
6805 a more manageable set. The grouping is done by DW_AT_stmt_list entry
6806 so that all types coming from the same compilation (.o file) are grouped
6807 together. A future step could be to put the types in the same symtab as
6808 the CU the types ultimately came from. */
6811 hash_type_unit_group (const void *item
)
6813 const struct type_unit_group
*tu_group
6814 = (const struct type_unit_group
*) item
;
6816 return hash_stmt_list_entry (&tu_group
->hash
);
6820 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
6822 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
6823 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
6825 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
6828 /* Allocate a hash table for type unit groups. */
6831 allocate_type_unit_groups_table (void)
6833 return htab_create_alloc_ex (3,
6834 hash_type_unit_group
,
6837 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
6838 hashtab_obstack_allocate
,
6839 dummy_obstack_deallocate
);
6842 /* Type units that don't have DW_AT_stmt_list are grouped into their own
6843 partial symtabs. We combine several TUs per psymtab to not let the size
6844 of any one psymtab grow too big. */
6845 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
6846 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
6848 /* Helper routine for get_type_unit_group.
6849 Create the type_unit_group object used to hold one or more TUs. */
6851 static struct type_unit_group
*
6852 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
6854 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6855 struct dwarf2_per_cu_data
*per_cu
;
6856 struct type_unit_group
*tu_group
;
6858 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6859 struct type_unit_group
);
6860 per_cu
= &tu_group
->per_cu
;
6861 per_cu
->objfile
= objfile
;
6863 if (dwarf2_per_objfile
->using_index
)
6865 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6866 struct dwarf2_per_cu_quick_data
);
6870 unsigned int line_offset
= to_underlying (line_offset_struct
);
6871 struct partial_symtab
*pst
;
6874 /* Give the symtab a useful name for debug purposes. */
6875 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
6876 name
= xstrprintf ("<type_units_%d>",
6877 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
6879 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
6881 pst
= create_partial_symtab (per_cu
, name
);
6887 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
6888 tu_group
->hash
.line_sect_off
= line_offset_struct
;
6893 /* Look up the type_unit_group for type unit CU, and create it if necessary.
6894 STMT_LIST is a DW_AT_stmt_list attribute. */
6896 static struct type_unit_group
*
6897 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
6899 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6900 struct type_unit_group
*tu_group
;
6902 unsigned int line_offset
;
6903 struct type_unit_group type_unit_group_for_lookup
;
6905 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
6907 dwarf2_per_objfile
->type_unit_groups
=
6908 allocate_type_unit_groups_table ();
6911 /* Do we need to create a new group, or can we use an existing one? */
6915 line_offset
= DW_UNSND (stmt_list
);
6916 ++tu_stats
->nr_symtab_sharers
;
6920 /* Ugh, no stmt_list. Rare, but we have to handle it.
6921 We can do various things here like create one group per TU or
6922 spread them over multiple groups to split up the expansion work.
6923 To avoid worst case scenarios (too many groups or too large groups)
6924 we, umm, group them in bunches. */
6925 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
6926 | (tu_stats
->nr_stmt_less_type_units
6927 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
6928 ++tu_stats
->nr_stmt_less_type_units
;
6931 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
6932 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
6933 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
6934 &type_unit_group_for_lookup
, INSERT
);
6937 tu_group
= (struct type_unit_group
*) *slot
;
6938 gdb_assert (tu_group
!= NULL
);
6942 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
6943 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
6945 ++tu_stats
->nr_symtabs
;
6951 /* Partial symbol tables. */
6953 /* Create a psymtab named NAME and assign it to PER_CU.
6955 The caller must fill in the following details:
6956 dirname, textlow, texthigh. */
6958 static struct partial_symtab
*
6959 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
6961 struct objfile
*objfile
= per_cu
->objfile
;
6962 struct partial_symtab
*pst
;
6964 pst
= start_psymtab_common (objfile
, name
, 0,
6965 objfile
->global_psymbols
,
6966 objfile
->static_psymbols
);
6968 pst
->psymtabs_addrmap_supported
= 1;
6970 /* This is the glue that links PST into GDB's symbol API. */
6971 pst
->read_symtab_private
= per_cu
;
6972 pst
->read_symtab
= dwarf2_read_symtab
;
6973 per_cu
->v
.psymtab
= pst
;
6978 /* The DATA object passed to process_psymtab_comp_unit_reader has this
6981 struct process_psymtab_comp_unit_data
6983 /* True if we are reading a DW_TAG_partial_unit. */
6985 int want_partial_unit
;
6987 /* The "pretend" language that is used if the CU doesn't declare a
6990 enum language pretend_language
;
6993 /* die_reader_func for process_psymtab_comp_unit. */
6996 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
6997 const gdb_byte
*info_ptr
,
6998 struct die_info
*comp_unit_die
,
7002 struct dwarf2_cu
*cu
= reader
->cu
;
7003 struct objfile
*objfile
= cu
->objfile
;
7004 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7005 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7007 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7008 struct partial_symtab
*pst
;
7009 enum pc_bounds_kind cu_bounds_kind
;
7010 const char *filename
;
7011 struct process_psymtab_comp_unit_data
*info
7012 = (struct process_psymtab_comp_unit_data
*) data
;
7014 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7017 gdb_assert (! per_cu
->is_debug_types
);
7019 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7021 cu
->list_in_scope
= &file_symbols
;
7023 /* Allocate a new partial symbol table structure. */
7024 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7025 if (filename
== NULL
)
7028 pst
= create_partial_symtab (per_cu
, filename
);
7030 /* This must be done before calling dwarf2_build_include_psymtabs. */
7031 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7033 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7035 dwarf2_find_base_address (comp_unit_die
, cu
);
7037 /* Possibly set the default values of LOWPC and HIGHPC from
7039 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7040 &best_highpc
, cu
, pst
);
7041 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7042 /* Store the contiguous range if it is not empty; it can be empty for
7043 CUs with no code. */
7044 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7045 gdbarch_adjust_dwarf2_addr (gdbarch
,
7046 best_lowpc
+ baseaddr
),
7047 gdbarch_adjust_dwarf2_addr (gdbarch
,
7048 best_highpc
+ baseaddr
) - 1,
7051 /* Check if comp unit has_children.
7052 If so, read the rest of the partial symbols from this comp unit.
7053 If not, there's no more debug_info for this comp unit. */
7056 struct partial_die_info
*first_die
;
7057 CORE_ADDR lowpc
, highpc
;
7059 lowpc
= ((CORE_ADDR
) -1);
7060 highpc
= ((CORE_ADDR
) 0);
7062 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7064 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7065 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7067 /* If we didn't find a lowpc, set it to highpc to avoid
7068 complaints from `maint check'. */
7069 if (lowpc
== ((CORE_ADDR
) -1))
7072 /* If the compilation unit didn't have an explicit address range,
7073 then use the information extracted from its child dies. */
7074 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7077 best_highpc
= highpc
;
7080 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7081 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7083 end_psymtab_common (objfile
, pst
);
7085 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7088 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7089 struct dwarf2_per_cu_data
*iter
;
7091 /* Fill in 'dependencies' here; we fill in 'users' in a
7093 pst
->number_of_dependencies
= len
;
7095 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
7097 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7100 pst
->dependencies
[i
] = iter
->v
.psymtab
;
7102 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7105 /* Get the list of files included in the current compilation unit,
7106 and build a psymtab for each of them. */
7107 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7109 if (dwarf_read_debug
)
7111 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7113 fprintf_unfiltered (gdb_stdlog
,
7114 "Psymtab for %s unit @0x%x: %s - %s"
7115 ", %d global, %d static syms\n",
7116 per_cu
->is_debug_types
? "type" : "comp",
7117 to_underlying (per_cu
->sect_off
),
7118 paddress (gdbarch
, pst
->textlow
),
7119 paddress (gdbarch
, pst
->texthigh
),
7120 pst
->n_global_syms
, pst
->n_static_syms
);
7124 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7125 Process compilation unit THIS_CU for a psymtab. */
7128 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7129 int want_partial_unit
,
7130 enum language pretend_language
)
7132 /* If this compilation unit was already read in, free the
7133 cached copy in order to read it in again. This is
7134 necessary because we skipped some symbols when we first
7135 read in the compilation unit (see load_partial_dies).
7136 This problem could be avoided, but the benefit is unclear. */
7137 if (this_cu
->cu
!= NULL
)
7138 free_one_cached_comp_unit (this_cu
);
7140 if (this_cu
->is_debug_types
)
7141 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
7145 process_psymtab_comp_unit_data info
;
7146 info
.want_partial_unit
= want_partial_unit
;
7147 info
.pretend_language
= pretend_language
;
7148 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
7149 process_psymtab_comp_unit_reader
, &info
);
7152 /* Age out any secondary CUs. */
7153 age_cached_comp_units ();
7156 /* Reader function for build_type_psymtabs. */
7159 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7160 const gdb_byte
*info_ptr
,
7161 struct die_info
*type_unit_die
,
7165 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7166 struct dwarf2_cu
*cu
= reader
->cu
;
7167 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7168 struct signatured_type
*sig_type
;
7169 struct type_unit_group
*tu_group
;
7170 struct attribute
*attr
;
7171 struct partial_die_info
*first_die
;
7172 CORE_ADDR lowpc
, highpc
;
7173 struct partial_symtab
*pst
;
7175 gdb_assert (data
== NULL
);
7176 gdb_assert (per_cu
->is_debug_types
);
7177 sig_type
= (struct signatured_type
*) per_cu
;
7182 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
7183 tu_group
= get_type_unit_group (cu
, attr
);
7185 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
7187 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7188 cu
->list_in_scope
= &file_symbols
;
7189 pst
= create_partial_symtab (per_cu
, "");
7192 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7194 lowpc
= (CORE_ADDR
) -1;
7195 highpc
= (CORE_ADDR
) 0;
7196 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7198 end_psymtab_common (objfile
, pst
);
7201 /* Struct used to sort TUs by their abbreviation table offset. */
7203 struct tu_abbrev_offset
7205 struct signatured_type
*sig_type
;
7206 sect_offset abbrev_offset
;
7209 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
7212 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
7214 const struct tu_abbrev_offset
* const *a
7215 = (const struct tu_abbrev_offset
* const*) ap
;
7216 const struct tu_abbrev_offset
* const *b
7217 = (const struct tu_abbrev_offset
* const*) bp
;
7218 sect_offset aoff
= (*a
)->abbrev_offset
;
7219 sect_offset boff
= (*b
)->abbrev_offset
;
7221 return (aoff
> boff
) - (aoff
< boff
);
7224 /* Efficiently read all the type units.
7225 This does the bulk of the work for build_type_psymtabs.
7227 The efficiency is because we sort TUs by the abbrev table they use and
7228 only read each abbrev table once. In one program there are 200K TUs
7229 sharing 8K abbrev tables.
7231 The main purpose of this function is to support building the
7232 dwarf2_per_objfile->type_unit_groups table.
7233 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7234 can collapse the search space by grouping them by stmt_list.
7235 The savings can be significant, in the same program from above the 200K TUs
7236 share 8K stmt_list tables.
7238 FUNC is expected to call get_type_unit_group, which will create the
7239 struct type_unit_group if necessary and add it to
7240 dwarf2_per_objfile->type_unit_groups. */
7243 build_type_psymtabs_1 (void)
7245 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7246 struct cleanup
*cleanups
;
7247 struct abbrev_table
*abbrev_table
;
7248 sect_offset abbrev_offset
;
7249 struct tu_abbrev_offset
*sorted_by_abbrev
;
7252 /* It's up to the caller to not call us multiple times. */
7253 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7255 if (dwarf2_per_objfile
->n_type_units
== 0)
7258 /* TUs typically share abbrev tables, and there can be way more TUs than
7259 abbrev tables. Sort by abbrev table to reduce the number of times we
7260 read each abbrev table in.
7261 Alternatives are to punt or to maintain a cache of abbrev tables.
7262 This is simpler and efficient enough for now.
7264 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7265 symtab to use). Typically TUs with the same abbrev offset have the same
7266 stmt_list value too so in practice this should work well.
7268 The basic algorithm here is:
7270 sort TUs by abbrev table
7271 for each TU with same abbrev table:
7272 read abbrev table if first user
7273 read TU top level DIE
7274 [IWBN if DWO skeletons had DW_AT_stmt_list]
7277 if (dwarf_read_debug
)
7278 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7280 /* Sort in a separate table to maintain the order of all_type_units
7281 for .gdb_index: TU indices directly index all_type_units. */
7282 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
7283 dwarf2_per_objfile
->n_type_units
);
7284 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
7286 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
7288 sorted_by_abbrev
[i
].sig_type
= sig_type
;
7289 sorted_by_abbrev
[i
].abbrev_offset
=
7290 read_abbrev_offset (sig_type
->per_cu
.section
,
7291 sig_type
->per_cu
.sect_off
);
7293 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
7294 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
7295 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
7297 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7298 abbrev_table
= NULL
;
7299 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
7301 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
7303 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
7305 /* Switch to the next abbrev table if necessary. */
7306 if (abbrev_table
== NULL
7307 || tu
->abbrev_offset
!= abbrev_offset
)
7309 if (abbrev_table
!= NULL
)
7311 abbrev_table_free (abbrev_table
);
7312 /* Reset to NULL in case abbrev_table_read_table throws
7313 an error: abbrev_table_free_cleanup will get called. */
7314 abbrev_table
= NULL
;
7316 abbrev_offset
= tu
->abbrev_offset
;
7318 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
7320 ++tu_stats
->nr_uniq_abbrev_tables
;
7323 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
7324 build_type_psymtabs_reader
, NULL
);
7327 do_cleanups (cleanups
);
7330 /* Print collected type unit statistics. */
7333 print_tu_stats (void)
7335 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7337 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7338 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
7339 dwarf2_per_objfile
->n_type_units
);
7340 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7341 tu_stats
->nr_uniq_abbrev_tables
);
7342 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7343 tu_stats
->nr_symtabs
);
7344 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7345 tu_stats
->nr_symtab_sharers
);
7346 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7347 tu_stats
->nr_stmt_less_type_units
);
7348 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7349 tu_stats
->nr_all_type_units_reallocs
);
7352 /* Traversal function for build_type_psymtabs. */
7355 build_type_psymtab_dependencies (void **slot
, void *info
)
7357 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7358 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7359 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7360 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7361 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
7362 struct signatured_type
*iter
;
7365 gdb_assert (len
> 0);
7366 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
7368 pst
->number_of_dependencies
= len
;
7370 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
7372 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
7375 gdb_assert (iter
->per_cu
.is_debug_types
);
7376 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7377 iter
->type_unit_group
= tu_group
;
7380 VEC_free (sig_type_ptr
, tu_group
->tus
);
7385 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7386 Build partial symbol tables for the .debug_types comp-units. */
7389 build_type_psymtabs (struct objfile
*objfile
)
7391 if (! create_all_type_units (objfile
))
7394 build_type_psymtabs_1 ();
7397 /* Traversal function for process_skeletonless_type_unit.
7398 Read a TU in a DWO file and build partial symbols for it. */
7401 process_skeletonless_type_unit (void **slot
, void *info
)
7403 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7404 struct objfile
*objfile
= (struct objfile
*) info
;
7405 struct signatured_type find_entry
, *entry
;
7407 /* If this TU doesn't exist in the global table, add it and read it in. */
7409 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7411 dwarf2_per_objfile
->signatured_types
7412 = allocate_signatured_type_table (objfile
);
7415 find_entry
.signature
= dwo_unit
->signature
;
7416 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
7418 /* If we've already seen this type there's nothing to do. What's happening
7419 is we're doing our own version of comdat-folding here. */
7423 /* This does the job that create_all_type_units would have done for
7425 entry
= add_type_unit (dwo_unit
->signature
, slot
);
7426 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
7429 /* This does the job that build_type_psymtabs_1 would have done. */
7430 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
7431 build_type_psymtabs_reader
, NULL
);
7436 /* Traversal function for process_skeletonless_type_units. */
7439 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7441 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7443 if (dwo_file
->tus
!= NULL
)
7445 htab_traverse_noresize (dwo_file
->tus
,
7446 process_skeletonless_type_unit
, info
);
7452 /* Scan all TUs of DWO files, verifying we've processed them.
7453 This is needed in case a TU was emitted without its skeleton.
7454 Note: This can't be done until we know what all the DWO files are. */
7457 process_skeletonless_type_units (struct objfile
*objfile
)
7459 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7460 if (get_dwp_file () == NULL
7461 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7463 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
7464 process_dwo_file_for_skeletonless_type_units
,
7469 /* Compute the 'user' field for each psymtab in OBJFILE. */
7472 set_partial_user (struct objfile
*objfile
)
7476 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
7478 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
7479 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7485 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7487 /* Set the 'user' field only if it is not already set. */
7488 if (pst
->dependencies
[j
]->user
== NULL
)
7489 pst
->dependencies
[j
]->user
= pst
;
7494 /* Build the partial symbol table by doing a quick pass through the
7495 .debug_info and .debug_abbrev sections. */
7498 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
7500 struct cleanup
*back_to
;
7503 if (dwarf_read_debug
)
7505 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7506 objfile_name (objfile
));
7509 dwarf2_per_objfile
->reading_partial_symbols
= 1;
7511 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
7513 /* Any cached compilation units will be linked by the per-objfile
7514 read_in_chain. Make sure to free them when we're done. */
7515 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
7517 build_type_psymtabs (objfile
);
7519 create_all_comp_units (objfile
);
7521 /* Create a temporary address map on a temporary obstack. We later
7522 copy this to the final obstack. */
7523 auto_obstack temp_obstack
;
7525 scoped_restore save_psymtabs_addrmap
7526 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
7527 addrmap_create_mutable (&temp_obstack
));
7529 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
7531 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
7533 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
7536 /* This has to wait until we read the CUs, we need the list of DWOs. */
7537 process_skeletonless_type_units (objfile
);
7539 /* Now that all TUs have been processed we can fill in the dependencies. */
7540 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7542 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
7543 build_type_psymtab_dependencies
, NULL
);
7546 if (dwarf_read_debug
)
7549 set_partial_user (objfile
);
7551 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
7552 &objfile
->objfile_obstack
);
7553 /* At this point we want to keep the address map. */
7554 save_psymtabs_addrmap
.release ();
7556 do_cleanups (back_to
);
7558 if (dwarf_read_debug
)
7559 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7560 objfile_name (objfile
));
7563 /* die_reader_func for load_partial_comp_unit. */
7566 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
7567 const gdb_byte
*info_ptr
,
7568 struct die_info
*comp_unit_die
,
7572 struct dwarf2_cu
*cu
= reader
->cu
;
7574 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
7576 /* Check if comp unit has_children.
7577 If so, read the rest of the partial symbols from this comp unit.
7578 If not, there's no more debug_info for this comp unit. */
7580 load_partial_dies (reader
, info_ptr
, 0);
7583 /* Load the partial DIEs for a secondary CU into memory.
7584 This is also used when rereading a primary CU with load_all_dies. */
7587 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7589 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7590 load_partial_comp_unit_reader
, NULL
);
7594 read_comp_units_from_section (struct objfile
*objfile
,
7595 struct dwarf2_section_info
*section
,
7596 struct dwarf2_section_info
*abbrev_section
,
7597 unsigned int is_dwz
,
7600 struct dwarf2_per_cu_data
***all_comp_units
)
7602 const gdb_byte
*info_ptr
;
7603 bfd
*abfd
= get_section_bfd_owner (section
);
7605 if (dwarf_read_debug
)
7606 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7607 get_section_name (section
),
7608 get_section_file_name (section
));
7610 dwarf2_read_section (objfile
, section
);
7612 info_ptr
= section
->buffer
;
7614 while (info_ptr
< section
->buffer
+ section
->size
)
7616 struct dwarf2_per_cu_data
*this_cu
;
7618 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7620 comp_unit_head cu_header
;
7621 read_and_check_comp_unit_head (&cu_header
, section
, abbrev_section
,
7622 info_ptr
, rcuh_kind::COMPILE
);
7624 /* Save the compilation unit for later lookup. */
7625 if (cu_header
.unit_type
!= DW_UT_type
)
7627 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7628 struct dwarf2_per_cu_data
);
7629 memset (this_cu
, 0, sizeof (*this_cu
));
7633 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7634 struct signatured_type
);
7635 memset (sig_type
, 0, sizeof (*sig_type
));
7636 sig_type
->signature
= cu_header
.signature
;
7637 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7638 this_cu
= &sig_type
->per_cu
;
7640 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7641 this_cu
->sect_off
= sect_off
;
7642 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7643 this_cu
->is_dwz
= is_dwz
;
7644 this_cu
->objfile
= objfile
;
7645 this_cu
->section
= section
;
7647 if (*n_comp_units
== *n_allocated
)
7650 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
7651 *all_comp_units
, *n_allocated
);
7653 (*all_comp_units
)[*n_comp_units
] = this_cu
;
7656 info_ptr
= info_ptr
+ this_cu
->length
;
7660 /* Create a list of all compilation units in OBJFILE.
7661 This is only done for -readnow and building partial symtabs. */
7664 create_all_comp_units (struct objfile
*objfile
)
7668 struct dwarf2_per_cu_data
**all_comp_units
;
7669 struct dwz_file
*dwz
;
7673 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
7675 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
,
7676 &dwarf2_per_objfile
->abbrev
, 0,
7677 &n_allocated
, &n_comp_units
, &all_comp_units
);
7679 dwz
= dwarf2_get_dwz_file ();
7681 read_comp_units_from_section (objfile
, &dwz
->info
, &dwz
->abbrev
, 1,
7682 &n_allocated
, &n_comp_units
,
7685 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
7686 struct dwarf2_per_cu_data
*,
7688 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
7689 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
7690 xfree (all_comp_units
);
7691 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
7694 /* Process all loaded DIEs for compilation unit CU, starting at
7695 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7696 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7697 DW_AT_ranges). See the comments of add_partial_subprogram on how
7698 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7701 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7702 CORE_ADDR
*highpc
, int set_addrmap
,
7703 struct dwarf2_cu
*cu
)
7705 struct partial_die_info
*pdi
;
7707 /* Now, march along the PDI's, descending into ones which have
7708 interesting children but skipping the children of the other ones,
7709 until we reach the end of the compilation unit. */
7715 fixup_partial_die (pdi
, cu
);
7717 /* Anonymous namespaces or modules have no name but have interesting
7718 children, so we need to look at them. Ditto for anonymous
7721 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7722 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7723 || pdi
->tag
== DW_TAG_imported_unit
)
7727 case DW_TAG_subprogram
:
7728 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7730 case DW_TAG_constant
:
7731 case DW_TAG_variable
:
7732 case DW_TAG_typedef
:
7733 case DW_TAG_union_type
:
7734 if (!pdi
->is_declaration
)
7736 add_partial_symbol (pdi
, cu
);
7739 case DW_TAG_class_type
:
7740 case DW_TAG_interface_type
:
7741 case DW_TAG_structure_type
:
7742 if (!pdi
->is_declaration
)
7744 add_partial_symbol (pdi
, cu
);
7746 if (cu
->language
== language_rust
&& pdi
->has_children
)
7747 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
7750 case DW_TAG_enumeration_type
:
7751 if (!pdi
->is_declaration
)
7752 add_partial_enumeration (pdi
, cu
);
7754 case DW_TAG_base_type
:
7755 case DW_TAG_subrange_type
:
7756 /* File scope base type definitions are added to the partial
7758 add_partial_symbol (pdi
, cu
);
7760 case DW_TAG_namespace
:
7761 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7764 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7766 case DW_TAG_imported_unit
:
7768 struct dwarf2_per_cu_data
*per_cu
;
7770 /* For now we don't handle imported units in type units. */
7771 if (cu
->per_cu
->is_debug_types
)
7773 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7774 " supported in type units [in module %s]"),
7775 objfile_name (cu
->objfile
));
7778 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.sect_off
,
7782 /* Go read the partial unit, if needed. */
7783 if (per_cu
->v
.psymtab
== NULL
)
7784 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
7786 VEC_safe_push (dwarf2_per_cu_ptr
,
7787 cu
->per_cu
->imported_symtabs
, per_cu
);
7790 case DW_TAG_imported_declaration
:
7791 add_partial_symbol (pdi
, cu
);
7798 /* If the die has a sibling, skip to the sibling. */
7800 pdi
= pdi
->die_sibling
;
7804 /* Functions used to compute the fully scoped name of a partial DIE.
7806 Normally, this is simple. For C++, the parent DIE's fully scoped
7807 name is concatenated with "::" and the partial DIE's name.
7808 Enumerators are an exception; they use the scope of their parent
7809 enumeration type, i.e. the name of the enumeration type is not
7810 prepended to the enumerator.
7812 There are two complexities. One is DW_AT_specification; in this
7813 case "parent" means the parent of the target of the specification,
7814 instead of the direct parent of the DIE. The other is compilers
7815 which do not emit DW_TAG_namespace; in this case we try to guess
7816 the fully qualified name of structure types from their members'
7817 linkage names. This must be done using the DIE's children rather
7818 than the children of any DW_AT_specification target. We only need
7819 to do this for structures at the top level, i.e. if the target of
7820 any DW_AT_specification (if any; otherwise the DIE itself) does not
7823 /* Compute the scope prefix associated with PDI's parent, in
7824 compilation unit CU. The result will be allocated on CU's
7825 comp_unit_obstack, or a copy of the already allocated PDI->NAME
7826 field. NULL is returned if no prefix is necessary. */
7828 partial_die_parent_scope (struct partial_die_info
*pdi
,
7829 struct dwarf2_cu
*cu
)
7831 const char *grandparent_scope
;
7832 struct partial_die_info
*parent
, *real_pdi
;
7834 /* We need to look at our parent DIE; if we have a DW_AT_specification,
7835 then this means the parent of the specification DIE. */
7838 while (real_pdi
->has_specification
)
7839 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
7840 real_pdi
->spec_is_dwz
, cu
);
7842 parent
= real_pdi
->die_parent
;
7846 if (parent
->scope_set
)
7847 return parent
->scope
;
7849 fixup_partial_die (parent
, cu
);
7851 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
7853 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
7854 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
7855 Work around this problem here. */
7856 if (cu
->language
== language_cplus
7857 && parent
->tag
== DW_TAG_namespace
7858 && strcmp (parent
->name
, "::") == 0
7859 && grandparent_scope
== NULL
)
7861 parent
->scope
= NULL
;
7862 parent
->scope_set
= 1;
7866 if (pdi
->tag
== DW_TAG_enumerator
)
7867 /* Enumerators should not get the name of the enumeration as a prefix. */
7868 parent
->scope
= grandparent_scope
;
7869 else if (parent
->tag
== DW_TAG_namespace
7870 || parent
->tag
== DW_TAG_module
7871 || parent
->tag
== DW_TAG_structure_type
7872 || parent
->tag
== DW_TAG_class_type
7873 || parent
->tag
== DW_TAG_interface_type
7874 || parent
->tag
== DW_TAG_union_type
7875 || parent
->tag
== DW_TAG_enumeration_type
)
7877 if (grandparent_scope
== NULL
)
7878 parent
->scope
= parent
->name
;
7880 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
7882 parent
->name
, 0, cu
);
7886 /* FIXME drow/2004-04-01: What should we be doing with
7887 function-local names? For partial symbols, we should probably be
7889 complaint (&symfile_complaints
,
7890 _("unhandled containing DIE tag %d for DIE at %d"),
7891 parent
->tag
, to_underlying (pdi
->sect_off
));
7892 parent
->scope
= grandparent_scope
;
7895 parent
->scope_set
= 1;
7896 return parent
->scope
;
7899 /* Return the fully scoped name associated with PDI, from compilation unit
7900 CU. The result will be allocated with malloc. */
7903 partial_die_full_name (struct partial_die_info
*pdi
,
7904 struct dwarf2_cu
*cu
)
7906 const char *parent_scope
;
7908 /* If this is a template instantiation, we can not work out the
7909 template arguments from partial DIEs. So, unfortunately, we have
7910 to go through the full DIEs. At least any work we do building
7911 types here will be reused if full symbols are loaded later. */
7912 if (pdi
->has_template_arguments
)
7914 fixup_partial_die (pdi
, cu
);
7916 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
7918 struct die_info
*die
;
7919 struct attribute attr
;
7920 struct dwarf2_cu
*ref_cu
= cu
;
7922 /* DW_FORM_ref_addr is using section offset. */
7923 attr
.name
= (enum dwarf_attribute
) 0;
7924 attr
.form
= DW_FORM_ref_addr
;
7925 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
7926 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
7928 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
7932 parent_scope
= partial_die_parent_scope (pdi
, cu
);
7933 if (parent_scope
== NULL
)
7936 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
7940 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
7942 struct objfile
*objfile
= cu
->objfile
;
7943 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7945 const char *actual_name
= NULL
;
7947 char *built_actual_name
;
7949 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7951 built_actual_name
= partial_die_full_name (pdi
, cu
);
7952 if (built_actual_name
!= NULL
)
7953 actual_name
= built_actual_name
;
7955 if (actual_name
== NULL
)
7956 actual_name
= pdi
->name
;
7960 case DW_TAG_subprogram
:
7961 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
7962 if (pdi
->is_external
|| cu
->language
== language_ada
)
7964 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
7965 of the global scope. But in Ada, we want to be able to access
7966 nested procedures globally. So all Ada subprograms are stored
7967 in the global scope. */
7968 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7969 built_actual_name
!= NULL
,
7970 VAR_DOMAIN
, LOC_BLOCK
,
7971 &objfile
->global_psymbols
,
7972 addr
, cu
->language
, objfile
);
7976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7977 built_actual_name
!= NULL
,
7978 VAR_DOMAIN
, LOC_BLOCK
,
7979 &objfile
->static_psymbols
,
7980 addr
, cu
->language
, objfile
);
7983 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
7984 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
7986 case DW_TAG_constant
:
7988 std::vector
<partial_symbol
*> *list
;
7990 if (pdi
->is_external
)
7991 list
= &objfile
->global_psymbols
;
7993 list
= &objfile
->static_psymbols
;
7994 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7995 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
7996 list
, 0, cu
->language
, objfile
);
7999 case DW_TAG_variable
:
8001 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8005 && !dwarf2_per_objfile
->has_section_at_zero
)
8007 /* A global or static variable may also have been stripped
8008 out by the linker if unused, in which case its address
8009 will be nullified; do not add such variables into partial
8010 symbol table then. */
8012 else if (pdi
->is_external
)
8015 Don't enter into the minimal symbol tables as there is
8016 a minimal symbol table entry from the ELF symbols already.
8017 Enter into partial symbol table if it has a location
8018 descriptor or a type.
8019 If the location descriptor is missing, new_symbol will create
8020 a LOC_UNRESOLVED symbol, the address of the variable will then
8021 be determined from the minimal symbol table whenever the variable
8023 The address for the partial symbol table entry is not
8024 used by GDB, but it comes in handy for debugging partial symbol
8027 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8028 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8029 built_actual_name
!= NULL
,
8030 VAR_DOMAIN
, LOC_STATIC
,
8031 &objfile
->global_psymbols
,
8033 cu
->language
, objfile
);
8037 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8039 /* Static Variable. Skip symbols whose value we cannot know (those
8040 without location descriptors or constant values). */
8041 if (!has_loc
&& !pdi
->has_const_value
)
8043 xfree (built_actual_name
);
8047 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8048 built_actual_name
!= NULL
,
8049 VAR_DOMAIN
, LOC_STATIC
,
8050 &objfile
->static_psymbols
,
8051 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8052 cu
->language
, objfile
);
8055 case DW_TAG_typedef
:
8056 case DW_TAG_base_type
:
8057 case DW_TAG_subrange_type
:
8058 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8059 built_actual_name
!= NULL
,
8060 VAR_DOMAIN
, LOC_TYPEDEF
,
8061 &objfile
->static_psymbols
,
8062 0, cu
->language
, objfile
);
8064 case DW_TAG_imported_declaration
:
8065 case DW_TAG_namespace
:
8066 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8067 built_actual_name
!= NULL
,
8068 VAR_DOMAIN
, LOC_TYPEDEF
,
8069 &objfile
->global_psymbols
,
8070 0, cu
->language
, objfile
);
8073 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8074 built_actual_name
!= NULL
,
8075 MODULE_DOMAIN
, LOC_TYPEDEF
,
8076 &objfile
->global_psymbols
,
8077 0, cu
->language
, objfile
);
8079 case DW_TAG_class_type
:
8080 case DW_TAG_interface_type
:
8081 case DW_TAG_structure_type
:
8082 case DW_TAG_union_type
:
8083 case DW_TAG_enumeration_type
:
8084 /* Skip external references. The DWARF standard says in the section
8085 about "Structure, Union, and Class Type Entries": "An incomplete
8086 structure, union or class type is represented by a structure,
8087 union or class entry that does not have a byte size attribute
8088 and that has a DW_AT_declaration attribute." */
8089 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8091 xfree (built_actual_name
);
8095 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8096 static vs. global. */
8097 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8098 built_actual_name
!= NULL
,
8099 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8100 cu
->language
== language_cplus
8101 ? &objfile
->global_psymbols
8102 : &objfile
->static_psymbols
,
8103 0, cu
->language
, objfile
);
8106 case DW_TAG_enumerator
:
8107 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8108 built_actual_name
!= NULL
,
8109 VAR_DOMAIN
, LOC_CONST
,
8110 cu
->language
== language_cplus
8111 ? &objfile
->global_psymbols
8112 : &objfile
->static_psymbols
,
8113 0, cu
->language
, objfile
);
8119 xfree (built_actual_name
);
8122 /* Read a partial die corresponding to a namespace; also, add a symbol
8123 corresponding to that namespace to the symbol table. NAMESPACE is
8124 the name of the enclosing namespace. */
8127 add_partial_namespace (struct partial_die_info
*pdi
,
8128 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8129 int set_addrmap
, struct dwarf2_cu
*cu
)
8131 /* Add a symbol for the namespace. */
8133 add_partial_symbol (pdi
, cu
);
8135 /* Now scan partial symbols in that namespace. */
8137 if (pdi
->has_children
)
8138 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8141 /* Read a partial die corresponding to a Fortran module. */
8144 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8145 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8147 /* Add a symbol for the namespace. */
8149 add_partial_symbol (pdi
, cu
);
8151 /* Now scan partial symbols in that module. */
8153 if (pdi
->has_children
)
8154 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8157 /* Read a partial die corresponding to a subprogram and create a partial
8158 symbol for that subprogram. When the CU language allows it, this
8159 routine also defines a partial symbol for each nested subprogram
8160 that this subprogram contains. If SET_ADDRMAP is true, record the
8161 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
8162 and highest PC values found in PDI.
8164 PDI may also be a lexical block, in which case we simply search
8165 recursively for subprograms defined inside that lexical block.
8166 Again, this is only performed when the CU language allows this
8167 type of definitions. */
8170 add_partial_subprogram (struct partial_die_info
*pdi
,
8171 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8172 int set_addrmap
, struct dwarf2_cu
*cu
)
8174 if (pdi
->tag
== DW_TAG_subprogram
)
8176 if (pdi
->has_pc_info
)
8178 if (pdi
->lowpc
< *lowpc
)
8179 *lowpc
= pdi
->lowpc
;
8180 if (pdi
->highpc
> *highpc
)
8181 *highpc
= pdi
->highpc
;
8184 struct objfile
*objfile
= cu
->objfile
;
8185 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8190 baseaddr
= ANOFFSET (objfile
->section_offsets
,
8191 SECT_OFF_TEXT (objfile
));
8192 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
8193 pdi
->lowpc
+ baseaddr
);
8194 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
8195 pdi
->highpc
+ baseaddr
);
8196 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
8197 cu
->per_cu
->v
.psymtab
);
8201 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8203 if (!pdi
->is_declaration
)
8204 /* Ignore subprogram DIEs that do not have a name, they are
8205 illegal. Do not emit a complaint at this point, we will
8206 do so when we convert this psymtab into a symtab. */
8208 add_partial_symbol (pdi
, cu
);
8212 if (! pdi
->has_children
)
8215 if (cu
->language
== language_ada
)
8217 pdi
= pdi
->die_child
;
8220 fixup_partial_die (pdi
, cu
);
8221 if (pdi
->tag
== DW_TAG_subprogram
8222 || pdi
->tag
== DW_TAG_lexical_block
)
8223 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8224 pdi
= pdi
->die_sibling
;
8229 /* Read a partial die corresponding to an enumeration type. */
8232 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8233 struct dwarf2_cu
*cu
)
8235 struct partial_die_info
*pdi
;
8237 if (enum_pdi
->name
!= NULL
)
8238 add_partial_symbol (enum_pdi
, cu
);
8240 pdi
= enum_pdi
->die_child
;
8243 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8244 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8246 add_partial_symbol (pdi
, cu
);
8247 pdi
= pdi
->die_sibling
;
8251 /* Return the initial uleb128 in the die at INFO_PTR. */
8254 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8256 unsigned int bytes_read
;
8258 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8261 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
8262 Return the corresponding abbrev, or NULL if the number is zero (indicating
8263 an empty DIE). In either case *BYTES_READ will be set to the length of
8264 the initial number. */
8266 static struct abbrev_info
*
8267 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
8268 struct dwarf2_cu
*cu
)
8270 bfd
*abfd
= cu
->objfile
->obfd
;
8271 unsigned int abbrev_number
;
8272 struct abbrev_info
*abbrev
;
8274 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8276 if (abbrev_number
== 0)
8279 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
8282 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8283 " at offset 0x%x [in module %s]"),
8284 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8285 to_underlying (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8291 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8292 Returns a pointer to the end of a series of DIEs, terminated by an empty
8293 DIE. Any children of the skipped DIEs will also be skipped. */
8295 static const gdb_byte
*
8296 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8298 struct dwarf2_cu
*cu
= reader
->cu
;
8299 struct abbrev_info
*abbrev
;
8300 unsigned int bytes_read
;
8304 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8306 return info_ptr
+ bytes_read
;
8308 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8312 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8313 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8314 abbrev corresponding to that skipped uleb128 should be passed in
8315 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8318 static const gdb_byte
*
8319 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8320 struct abbrev_info
*abbrev
)
8322 unsigned int bytes_read
;
8323 struct attribute attr
;
8324 bfd
*abfd
= reader
->abfd
;
8325 struct dwarf2_cu
*cu
= reader
->cu
;
8326 const gdb_byte
*buffer
= reader
->buffer
;
8327 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8328 unsigned int form
, i
;
8330 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8332 /* The only abbrev we care about is DW_AT_sibling. */
8333 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8335 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
8336 if (attr
.form
== DW_FORM_ref_addr
)
8337 complaint (&symfile_complaints
,
8338 _("ignoring absolute DW_AT_sibling"));
8341 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
8342 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8344 if (sibling_ptr
< info_ptr
)
8345 complaint (&symfile_complaints
,
8346 _("DW_AT_sibling points backwards"));
8347 else if (sibling_ptr
> reader
->buffer_end
)
8348 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
8354 /* If it isn't DW_AT_sibling, skip this attribute. */
8355 form
= abbrev
->attrs
[i
].form
;
8359 case DW_FORM_ref_addr
:
8360 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8361 and later it is offset sized. */
8362 if (cu
->header
.version
== 2)
8363 info_ptr
+= cu
->header
.addr_size
;
8365 info_ptr
+= cu
->header
.offset_size
;
8367 case DW_FORM_GNU_ref_alt
:
8368 info_ptr
+= cu
->header
.offset_size
;
8371 info_ptr
+= cu
->header
.addr_size
;
8378 case DW_FORM_flag_present
:
8379 case DW_FORM_implicit_const
:
8391 case DW_FORM_ref_sig8
:
8394 case DW_FORM_data16
:
8397 case DW_FORM_string
:
8398 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8399 info_ptr
+= bytes_read
;
8401 case DW_FORM_sec_offset
:
8403 case DW_FORM_GNU_strp_alt
:
8404 info_ptr
+= cu
->header
.offset_size
;
8406 case DW_FORM_exprloc
:
8408 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8409 info_ptr
+= bytes_read
;
8411 case DW_FORM_block1
:
8412 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8414 case DW_FORM_block2
:
8415 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8417 case DW_FORM_block4
:
8418 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8422 case DW_FORM_ref_udata
:
8423 case DW_FORM_GNU_addr_index
:
8424 case DW_FORM_GNU_str_index
:
8425 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8427 case DW_FORM_indirect
:
8428 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8429 info_ptr
+= bytes_read
;
8430 /* We need to continue parsing from here, so just go back to
8432 goto skip_attribute
;
8435 error (_("Dwarf Error: Cannot handle %s "
8436 "in DWARF reader [in module %s]"),
8437 dwarf_form_name (form
),
8438 bfd_get_filename (abfd
));
8442 if (abbrev
->has_children
)
8443 return skip_children (reader
, info_ptr
);
8448 /* Locate ORIG_PDI's sibling.
8449 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8451 static const gdb_byte
*
8452 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8453 struct partial_die_info
*orig_pdi
,
8454 const gdb_byte
*info_ptr
)
8456 /* Do we know the sibling already? */
8458 if (orig_pdi
->sibling
)
8459 return orig_pdi
->sibling
;
8461 /* Are there any children to deal with? */
8463 if (!orig_pdi
->has_children
)
8466 /* Skip the children the long way. */
8468 return skip_children (reader
, info_ptr
);
8471 /* Expand this partial symbol table into a full symbol table. SELF is
8475 dwarf2_read_symtab (struct partial_symtab
*self
,
8476 struct objfile
*objfile
)
8480 warning (_("bug: psymtab for %s is already read in."),
8487 printf_filtered (_("Reading in symbols for %s..."),
8489 gdb_flush (gdb_stdout
);
8492 /* Restore our global data. */
8494 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
8495 dwarf2_objfile_data_key
);
8497 /* If this psymtab is constructed from a debug-only objfile, the
8498 has_section_at_zero flag will not necessarily be correct. We
8499 can get the correct value for this flag by looking at the data
8500 associated with the (presumably stripped) associated objfile. */
8501 if (objfile
->separate_debug_objfile_backlink
)
8503 struct dwarf2_per_objfile
*dpo_backlink
8504 = ((struct dwarf2_per_objfile
*)
8505 objfile_data (objfile
->separate_debug_objfile_backlink
,
8506 dwarf2_objfile_data_key
));
8508 dwarf2_per_objfile
->has_section_at_zero
8509 = dpo_backlink
->has_section_at_zero
;
8512 dwarf2_per_objfile
->reading_partial_symbols
= 0;
8514 psymtab_to_symtab_1 (self
);
8516 /* Finish up the debug error message. */
8518 printf_filtered (_("done.\n"));
8521 process_cu_includes ();
8524 /* Reading in full CUs. */
8526 /* Add PER_CU to the queue. */
8529 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8530 enum language pretend_language
)
8532 struct dwarf2_queue_item
*item
;
8535 item
= XNEW (struct dwarf2_queue_item
);
8536 item
->per_cu
= per_cu
;
8537 item
->pretend_language
= pretend_language
;
8540 if (dwarf2_queue
== NULL
)
8541 dwarf2_queue
= item
;
8543 dwarf2_queue_tail
->next
= item
;
8545 dwarf2_queue_tail
= item
;
8548 /* If PER_CU is not yet queued, add it to the queue.
8549 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8551 The result is non-zero if PER_CU was queued, otherwise the result is zero
8552 meaning either PER_CU is already queued or it is already loaded.
8554 N.B. There is an invariant here that if a CU is queued then it is loaded.
8555 The caller is required to load PER_CU if we return non-zero. */
8558 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8559 struct dwarf2_per_cu_data
*per_cu
,
8560 enum language pretend_language
)
8562 /* We may arrive here during partial symbol reading, if we need full
8563 DIEs to process an unusual case (e.g. template arguments). Do
8564 not queue PER_CU, just tell our caller to load its DIEs. */
8565 if (dwarf2_per_objfile
->reading_partial_symbols
)
8567 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8572 /* Mark the dependence relation so that we don't flush PER_CU
8574 if (dependent_cu
!= NULL
)
8575 dwarf2_add_dependence (dependent_cu
, per_cu
);
8577 /* If it's already on the queue, we have nothing to do. */
8581 /* If the compilation unit is already loaded, just mark it as
8583 if (per_cu
->cu
!= NULL
)
8585 per_cu
->cu
->last_used
= 0;
8589 /* Add it to the queue. */
8590 queue_comp_unit (per_cu
, pretend_language
);
8595 /* Process the queue. */
8598 process_queue (void)
8600 struct dwarf2_queue_item
*item
, *next_item
;
8602 if (dwarf_read_debug
)
8604 fprintf_unfiltered (gdb_stdlog
,
8605 "Expanding one or more symtabs of objfile %s ...\n",
8606 objfile_name (dwarf2_per_objfile
->objfile
));
8609 /* The queue starts out with one item, but following a DIE reference
8610 may load a new CU, adding it to the end of the queue. */
8611 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
8613 if ((dwarf2_per_objfile
->using_index
8614 ? !item
->per_cu
->v
.quick
->compunit_symtab
8615 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
8616 /* Skip dummy CUs. */
8617 && item
->per_cu
->cu
!= NULL
)
8619 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
8620 unsigned int debug_print_threshold
;
8623 if (per_cu
->is_debug_types
)
8625 struct signatured_type
*sig_type
=
8626 (struct signatured_type
*) per_cu
;
8628 sprintf (buf
, "TU %s at offset 0x%x",
8629 hex_string (sig_type
->signature
),
8630 to_underlying (per_cu
->sect_off
));
8631 /* There can be 100s of TUs.
8632 Only print them in verbose mode. */
8633 debug_print_threshold
= 2;
8637 sprintf (buf
, "CU at offset 0x%x",
8638 to_underlying (per_cu
->sect_off
));
8639 debug_print_threshold
= 1;
8642 if (dwarf_read_debug
>= debug_print_threshold
)
8643 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8645 if (per_cu
->is_debug_types
)
8646 process_full_type_unit (per_cu
, item
->pretend_language
);
8648 process_full_comp_unit (per_cu
, item
->pretend_language
);
8650 if (dwarf_read_debug
>= debug_print_threshold
)
8651 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8654 item
->per_cu
->queued
= 0;
8655 next_item
= item
->next
;
8659 dwarf2_queue_tail
= NULL
;
8661 if (dwarf_read_debug
)
8663 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8664 objfile_name (dwarf2_per_objfile
->objfile
));
8668 /* Free all allocated queue entries. This function only releases anything if
8669 an error was thrown; if the queue was processed then it would have been
8670 freed as we went along. */
8673 dwarf2_release_queue (void *dummy
)
8675 struct dwarf2_queue_item
*item
, *last
;
8677 item
= dwarf2_queue
;
8680 /* Anything still marked queued is likely to be in an
8681 inconsistent state, so discard it. */
8682 if (item
->per_cu
->queued
)
8684 if (item
->per_cu
->cu
!= NULL
)
8685 free_one_cached_comp_unit (item
->per_cu
);
8686 item
->per_cu
->queued
= 0;
8694 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
8697 /* Read in full symbols for PST, and anything it depends on. */
8700 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
8702 struct dwarf2_per_cu_data
*per_cu
;
8708 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
8709 if (!pst
->dependencies
[i
]->readin
8710 && pst
->dependencies
[i
]->user
== NULL
)
8712 /* Inform about additional files that need to be read in. */
8715 /* FIXME: i18n: Need to make this a single string. */
8716 fputs_filtered (" ", gdb_stdout
);
8718 fputs_filtered ("and ", gdb_stdout
);
8720 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
8721 wrap_here (""); /* Flush output. */
8722 gdb_flush (gdb_stdout
);
8724 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
8727 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
8731 /* It's an include file, no symbols to read for it.
8732 Everything is in the parent symtab. */
8737 dw2_do_instantiate_symtab (per_cu
);
8740 /* Trivial hash function for die_info: the hash value of a DIE
8741 is its offset in .debug_info for this objfile. */
8744 die_hash (const void *item
)
8746 const struct die_info
*die
= (const struct die_info
*) item
;
8748 return to_underlying (die
->sect_off
);
8751 /* Trivial comparison function for die_info structures: two DIEs
8752 are equal if they have the same offset. */
8755 die_eq (const void *item_lhs
, const void *item_rhs
)
8757 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8758 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8760 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8763 /* die_reader_func for load_full_comp_unit.
8764 This is identical to read_signatured_type_reader,
8765 but is kept separate for now. */
8768 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
8769 const gdb_byte
*info_ptr
,
8770 struct die_info
*comp_unit_die
,
8774 struct dwarf2_cu
*cu
= reader
->cu
;
8775 enum language
*language_ptr
= (enum language
*) data
;
8777 gdb_assert (cu
->die_hash
== NULL
);
8779 htab_create_alloc_ex (cu
->header
.length
/ 12,
8783 &cu
->comp_unit_obstack
,
8784 hashtab_obstack_allocate
,
8785 dummy_obstack_deallocate
);
8788 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
8789 &info_ptr
, comp_unit_die
);
8790 cu
->dies
= comp_unit_die
;
8791 /* comp_unit_die is not stored in die_hash, no need. */
8793 /* We try not to read any attributes in this function, because not
8794 all CUs needed for references have been loaded yet, and symbol
8795 table processing isn't initialized. But we have to set the CU language,
8796 or we won't be able to build types correctly.
8797 Similarly, if we do not read the producer, we can not apply
8798 producer-specific interpretation. */
8799 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
8802 /* Load the DIEs associated with PER_CU into memory. */
8805 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8806 enum language pretend_language
)
8808 gdb_assert (! this_cu
->is_debug_types
);
8810 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8811 load_full_comp_unit_reader
, &pretend_language
);
8814 /* Add a DIE to the delayed physname list. */
8817 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8818 const char *name
, struct die_info
*die
,
8819 struct dwarf2_cu
*cu
)
8821 struct delayed_method_info mi
;
8823 mi
.fnfield_index
= fnfield_index
;
8827 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
8830 /* A cleanup for freeing the delayed method list. */
8833 free_delayed_list (void *ptr
)
8835 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
8836 if (cu
->method_list
!= NULL
)
8838 VEC_free (delayed_method_info
, cu
->method_list
);
8839 cu
->method_list
= NULL
;
8843 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
8844 "const" / "volatile". If so, decrements LEN by the length of the
8845 modifier and return true. Otherwise return false. */
8849 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
8851 size_t mod_len
= sizeof (mod
) - 1;
8852 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
8860 /* Compute the physnames of any methods on the CU's method list.
8862 The computation of method physnames is delayed in order to avoid the
8863 (bad) condition that one of the method's formal parameters is of an as yet
8867 compute_delayed_physnames (struct dwarf2_cu
*cu
)
8870 struct delayed_method_info
*mi
;
8872 /* Only C++ delays computing physnames. */
8873 if (VEC_empty (delayed_method_info
, cu
->method_list
))
8875 gdb_assert (cu
->language
== language_cplus
);
8877 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
8879 const char *physname
;
8880 struct fn_fieldlist
*fn_flp
8881 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
8882 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
8883 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
8884 = physname
? physname
: "";
8886 /* Since there's no tag to indicate whether a method is a
8887 const/volatile overload, extract that information out of the
8889 if (physname
!= NULL
)
8891 size_t len
= strlen (physname
);
8895 if (physname
[len
] == ')') /* shortcut */
8897 else if (check_modifier (physname
, len
, " const"))
8898 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
->index
) = 1;
8899 else if (check_modifier (physname
, len
, " volatile"))
8900 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
->index
) = 1;
8908 /* Go objects should be embedded in a DW_TAG_module DIE,
8909 and it's not clear if/how imported objects will appear.
8910 To keep Go support simple until that's worked out,
8911 go back through what we've read and create something usable.
8912 We could do this while processing each DIE, and feels kinda cleaner,
8913 but that way is more invasive.
8914 This is to, for example, allow the user to type "p var" or "b main"
8915 without having to specify the package name, and allow lookups
8916 of module.object to work in contexts that use the expression
8920 fixup_go_packaging (struct dwarf2_cu
*cu
)
8922 char *package_name
= NULL
;
8923 struct pending
*list
;
8926 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
8928 for (i
= 0; i
< list
->nsyms
; ++i
)
8930 struct symbol
*sym
= list
->symbol
[i
];
8932 if (SYMBOL_LANGUAGE (sym
) == language_go
8933 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
8935 char *this_package_name
= go_symbol_package_name (sym
);
8937 if (this_package_name
== NULL
)
8939 if (package_name
== NULL
)
8940 package_name
= this_package_name
;
8943 if (strcmp (package_name
, this_package_name
) != 0)
8944 complaint (&symfile_complaints
,
8945 _("Symtab %s has objects from two different Go packages: %s and %s"),
8946 (symbol_symtab (sym
) != NULL
8947 ? symtab_to_filename_for_display
8948 (symbol_symtab (sym
))
8949 : objfile_name (cu
->objfile
)),
8950 this_package_name
, package_name
);
8951 xfree (this_package_name
);
8957 if (package_name
!= NULL
)
8959 struct objfile
*objfile
= cu
->objfile
;
8960 const char *saved_package_name
8961 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8963 strlen (package_name
));
8964 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
8965 saved_package_name
);
8968 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8970 sym
= allocate_symbol (objfile
);
8971 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
8972 SYMBOL_SET_NAMES (sym
, saved_package_name
,
8973 strlen (saved_package_name
), 0, objfile
);
8974 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
8975 e.g., "main" finds the "main" module and not C's main(). */
8976 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8977 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
8978 SYMBOL_TYPE (sym
) = type
;
8980 add_symbol_to_list (sym
, &global_symbols
);
8982 xfree (package_name
);
8986 /* Return the symtab for PER_CU. This works properly regardless of
8987 whether we're using the index or psymtabs. */
8989 static struct compunit_symtab
*
8990 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
8992 return (dwarf2_per_objfile
->using_index
8993 ? per_cu
->v
.quick
->compunit_symtab
8994 : per_cu
->v
.psymtab
->compunit_symtab
);
8997 /* A helper function for computing the list of all symbol tables
8998 included by PER_CU. */
9001 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
9002 htab_t all_children
, htab_t all_type_symtabs
,
9003 struct dwarf2_per_cu_data
*per_cu
,
9004 struct compunit_symtab
*immediate_parent
)
9008 struct compunit_symtab
*cust
;
9009 struct dwarf2_per_cu_data
*iter
;
9011 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9014 /* This inclusion and its children have been processed. */
9019 /* Only add a CU if it has a symbol table. */
9020 cust
= get_compunit_symtab (per_cu
);
9023 /* If this is a type unit only add its symbol table if we haven't
9024 seen it yet (type unit per_cu's can share symtabs). */
9025 if (per_cu
->is_debug_types
)
9027 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9031 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
9032 if (cust
->user
== NULL
)
9033 cust
->user
= immediate_parent
;
9038 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
9039 if (cust
->user
== NULL
)
9040 cust
->user
= immediate_parent
;
9045 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
9048 recursively_compute_inclusions (result
, all_children
,
9049 all_type_symtabs
, iter
, cust
);
9053 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9057 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9059 gdb_assert (! per_cu
->is_debug_types
);
9061 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
9064 struct dwarf2_per_cu_data
*per_cu_iter
;
9065 struct compunit_symtab
*compunit_symtab_iter
;
9066 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
9067 htab_t all_children
, all_type_symtabs
;
9068 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9070 /* If we don't have a symtab, we can just skip this case. */
9074 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9075 NULL
, xcalloc
, xfree
);
9076 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9077 NULL
, xcalloc
, xfree
);
9080 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
9084 recursively_compute_inclusions (&result_symtabs
, all_children
,
9085 all_type_symtabs
, per_cu_iter
,
9089 /* Now we have a transitive closure of all the included symtabs. */
9090 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
9092 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
9093 struct compunit_symtab
*, len
+ 1);
9095 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
9096 compunit_symtab_iter
);
9098 cust
->includes
[ix
] = compunit_symtab_iter
;
9099 cust
->includes
[len
] = NULL
;
9101 VEC_free (compunit_symtab_ptr
, result_symtabs
);
9102 htab_delete (all_children
);
9103 htab_delete (all_type_symtabs
);
9107 /* Compute the 'includes' field for the symtabs of all the CUs we just
9111 process_cu_includes (void)
9114 struct dwarf2_per_cu_data
*iter
;
9117 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
9121 if (! iter
->is_debug_types
)
9122 compute_compunit_symtab_includes (iter
);
9125 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
9128 /* Generate full symbol information for PER_CU, whose DIEs have
9129 already been loaded into memory. */
9132 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9133 enum language pretend_language
)
9135 struct dwarf2_cu
*cu
= per_cu
->cu
;
9136 struct objfile
*objfile
= per_cu
->objfile
;
9137 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9138 CORE_ADDR lowpc
, highpc
;
9139 struct compunit_symtab
*cust
;
9140 struct cleanup
*delayed_list_cleanup
;
9142 struct block
*static_block
;
9145 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9148 scoped_free_pendings free_pending
;
9149 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
9151 cu
->list_in_scope
= &file_symbols
;
9153 cu
->language
= pretend_language
;
9154 cu
->language_defn
= language_def (cu
->language
);
9156 /* Do line number decoding in read_file_scope () */
9157 process_die (cu
->dies
, cu
);
9159 /* For now fudge the Go package. */
9160 if (cu
->language
== language_go
)
9161 fixup_go_packaging (cu
);
9163 /* Now that we have processed all the DIEs in the CU, all the types
9164 should be complete, and it should now be safe to compute all of the
9166 compute_delayed_physnames (cu
);
9167 do_cleanups (delayed_list_cleanup
);
9169 /* Some compilers don't define a DW_AT_high_pc attribute for the
9170 compilation unit. If the DW_AT_high_pc is missing, synthesize
9171 it, by scanning the DIE's below the compilation unit. */
9172 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9174 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9175 static_block
= end_symtab_get_static_block (addr
, 0, 1);
9177 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9178 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9179 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9180 addrmap to help ensure it has an accurate map of pc values belonging to
9182 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9184 cust
= end_symtab_from_static_block (static_block
,
9185 SECT_OFF_TEXT (objfile
), 0);
9189 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9191 /* Set symtab language to language from DW_AT_language. If the
9192 compilation is from a C file generated by language preprocessors, do
9193 not set the language if it was already deduced by start_subfile. */
9194 if (!(cu
->language
== language_c
9195 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9196 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9198 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9199 produce DW_AT_location with location lists but it can be possibly
9200 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9201 there were bugs in prologue debug info, fixed later in GCC-4.5
9202 by "unwind info for epilogues" patch (which is not directly related).
9204 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9205 needed, it would be wrong due to missing DW_AT_producer there.
9207 Still one can confuse GDB by using non-standard GCC compilation
9208 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9210 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9211 cust
->locations_valid
= 1;
9213 if (gcc_4_minor
>= 5)
9214 cust
->epilogue_unwind_valid
= 1;
9216 cust
->call_site_htab
= cu
->call_site_htab
;
9219 if (dwarf2_per_objfile
->using_index
)
9220 per_cu
->v
.quick
->compunit_symtab
= cust
;
9223 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
9224 pst
->compunit_symtab
= cust
;
9228 /* Push it for inclusion processing later. */
9229 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
9232 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9233 already been loaded into memory. */
9236 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9237 enum language pretend_language
)
9239 struct dwarf2_cu
*cu
= per_cu
->cu
;
9240 struct objfile
*objfile
= per_cu
->objfile
;
9241 struct compunit_symtab
*cust
;
9242 struct cleanup
*delayed_list_cleanup
;
9243 struct signatured_type
*sig_type
;
9245 gdb_assert (per_cu
->is_debug_types
);
9246 sig_type
= (struct signatured_type
*) per_cu
;
9249 scoped_free_pendings free_pending
;
9250 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
9252 cu
->list_in_scope
= &file_symbols
;
9254 cu
->language
= pretend_language
;
9255 cu
->language_defn
= language_def (cu
->language
);
9257 /* The symbol tables are set up in read_type_unit_scope. */
9258 process_die (cu
->dies
, cu
);
9260 /* For now fudge the Go package. */
9261 if (cu
->language
== language_go
)
9262 fixup_go_packaging (cu
);
9264 /* Now that we have processed all the DIEs in the CU, all the types
9265 should be complete, and it should now be safe to compute all of the
9267 compute_delayed_physnames (cu
);
9268 do_cleanups (delayed_list_cleanup
);
9270 /* TUs share symbol tables.
9271 If this is the first TU to use this symtab, complete the construction
9272 of it with end_expandable_symtab. Otherwise, complete the addition of
9273 this TU's symbols to the existing symtab. */
9274 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9276 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9277 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9281 /* Set symtab language to language from DW_AT_language. If the
9282 compilation is from a C file generated by language preprocessors,
9283 do not set the language if it was already deduced by
9285 if (!(cu
->language
== language_c
9286 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9287 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9292 augment_type_symtab ();
9293 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9296 if (dwarf2_per_objfile
->using_index
)
9297 per_cu
->v
.quick
->compunit_symtab
= cust
;
9300 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
9301 pst
->compunit_symtab
= cust
;
9306 /* Process an imported unit DIE. */
9309 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9311 struct attribute
*attr
;
9313 /* For now we don't handle imported units in type units. */
9314 if (cu
->per_cu
->is_debug_types
)
9316 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9317 " supported in type units [in module %s]"),
9318 objfile_name (cu
->objfile
));
9321 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9324 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9325 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9326 dwarf2_per_cu_data
*per_cu
9327 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, cu
->objfile
);
9329 /* If necessary, add it to the queue and load its DIEs. */
9330 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9331 load_full_comp_unit (per_cu
, cu
->language
);
9333 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
9338 /* RAII object that represents a process_die scope: i.e.,
9339 starts/finishes processing a DIE. */
9340 class process_die_scope
9343 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9344 : m_die (die
), m_cu (cu
)
9346 /* We should only be processing DIEs not already in process. */
9347 gdb_assert (!m_die
->in_process
);
9348 m_die
->in_process
= true;
9351 ~process_die_scope ()
9353 m_die
->in_process
= false;
9355 /* If we're done processing the DIE for the CU that owns the line
9356 header, we don't need the line header anymore. */
9357 if (m_cu
->line_header_die_owner
== m_die
)
9359 delete m_cu
->line_header
;
9360 m_cu
->line_header
= NULL
;
9361 m_cu
->line_header_die_owner
= NULL
;
9370 /* Process a die and its children. */
9373 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9375 process_die_scope
scope (die
, cu
);
9379 case DW_TAG_padding
:
9381 case DW_TAG_compile_unit
:
9382 case DW_TAG_partial_unit
:
9383 read_file_scope (die
, cu
);
9385 case DW_TAG_type_unit
:
9386 read_type_unit_scope (die
, cu
);
9388 case DW_TAG_subprogram
:
9389 case DW_TAG_inlined_subroutine
:
9390 read_func_scope (die
, cu
);
9392 case DW_TAG_lexical_block
:
9393 case DW_TAG_try_block
:
9394 case DW_TAG_catch_block
:
9395 read_lexical_block_scope (die
, cu
);
9397 case DW_TAG_call_site
:
9398 case DW_TAG_GNU_call_site
:
9399 read_call_site_scope (die
, cu
);
9401 case DW_TAG_class_type
:
9402 case DW_TAG_interface_type
:
9403 case DW_TAG_structure_type
:
9404 case DW_TAG_union_type
:
9405 process_structure_scope (die
, cu
);
9407 case DW_TAG_enumeration_type
:
9408 process_enumeration_scope (die
, cu
);
9411 /* These dies have a type, but processing them does not create
9412 a symbol or recurse to process the children. Therefore we can
9413 read them on-demand through read_type_die. */
9414 case DW_TAG_subroutine_type
:
9415 case DW_TAG_set_type
:
9416 case DW_TAG_array_type
:
9417 case DW_TAG_pointer_type
:
9418 case DW_TAG_ptr_to_member_type
:
9419 case DW_TAG_reference_type
:
9420 case DW_TAG_rvalue_reference_type
:
9421 case DW_TAG_string_type
:
9424 case DW_TAG_base_type
:
9425 case DW_TAG_subrange_type
:
9426 case DW_TAG_typedef
:
9427 /* Add a typedef symbol for the type definition, if it has a
9429 new_symbol (die
, read_type_die (die
, cu
), cu
);
9431 case DW_TAG_common_block
:
9432 read_common_block (die
, cu
);
9434 case DW_TAG_common_inclusion
:
9436 case DW_TAG_namespace
:
9437 cu
->processing_has_namespace_info
= 1;
9438 read_namespace (die
, cu
);
9441 cu
->processing_has_namespace_info
= 1;
9442 read_module (die
, cu
);
9444 case DW_TAG_imported_declaration
:
9445 cu
->processing_has_namespace_info
= 1;
9446 if (read_namespace_alias (die
, cu
))
9448 /* The declaration is not a global namespace alias: fall through. */
9449 case DW_TAG_imported_module
:
9450 cu
->processing_has_namespace_info
= 1;
9451 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9452 || cu
->language
!= language_fortran
))
9453 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
9454 dwarf_tag_name (die
->tag
));
9455 read_import_statement (die
, cu
);
9458 case DW_TAG_imported_unit
:
9459 process_imported_unit_die (die
, cu
);
9462 case DW_TAG_variable
:
9463 read_variable (die
, cu
);
9467 new_symbol (die
, NULL
, cu
);
9472 /* DWARF name computation. */
9474 /* A helper function for dwarf2_compute_name which determines whether DIE
9475 needs to have the name of the scope prepended to the name listed in the
9479 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9481 struct attribute
*attr
;
9485 case DW_TAG_namespace
:
9486 case DW_TAG_typedef
:
9487 case DW_TAG_class_type
:
9488 case DW_TAG_interface_type
:
9489 case DW_TAG_structure_type
:
9490 case DW_TAG_union_type
:
9491 case DW_TAG_enumeration_type
:
9492 case DW_TAG_enumerator
:
9493 case DW_TAG_subprogram
:
9494 case DW_TAG_inlined_subroutine
:
9496 case DW_TAG_imported_declaration
:
9499 case DW_TAG_variable
:
9500 case DW_TAG_constant
:
9501 /* We only need to prefix "globally" visible variables. These include
9502 any variable marked with DW_AT_external or any variable that
9503 lives in a namespace. [Variables in anonymous namespaces
9504 require prefixing, but they are not DW_AT_external.] */
9506 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
9508 struct dwarf2_cu
*spec_cu
= cu
;
9510 return die_needs_namespace (die_specification (die
, &spec_cu
),
9514 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9515 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
9516 && die
->parent
->tag
!= DW_TAG_module
)
9518 /* A variable in a lexical block of some kind does not need a
9519 namespace, even though in C++ such variables may be external
9520 and have a mangled name. */
9521 if (die
->parent
->tag
== DW_TAG_lexical_block
9522 || die
->parent
->tag
== DW_TAG_try_block
9523 || die
->parent
->tag
== DW_TAG_catch_block
9524 || die
->parent
->tag
== DW_TAG_subprogram
)
9533 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
9534 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9535 defined for the given DIE. */
9537 static struct attribute
*
9538 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
9540 struct attribute
*attr
;
9542 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
9544 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9549 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
9550 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9551 defined for the given DIE. */
9554 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9556 const char *linkage_name
;
9558 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
9559 if (linkage_name
== NULL
)
9560 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9562 return linkage_name
;
9565 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
9566 compute the physname for the object, which include a method's:
9567 - formal parameters (C++),
9568 - receiver type (Go),
9570 The term "physname" is a bit confusing.
9571 For C++, for example, it is the demangled name.
9572 For Go, for example, it's the mangled name.
9574 For Ada, return the DIE's linkage name rather than the fully qualified
9575 name. PHYSNAME is ignored..
9577 The result is allocated on the objfile_obstack and canonicalized. */
9580 dwarf2_compute_name (const char *name
,
9581 struct die_info
*die
, struct dwarf2_cu
*cu
,
9584 struct objfile
*objfile
= cu
->objfile
;
9587 name
= dwarf2_name (die
, cu
);
9589 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
9590 but otherwise compute it by typename_concat inside GDB.
9591 FIXME: Actually this is not really true, or at least not always true.
9592 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
9593 Fortran names because there is no mangling standard. So new_symbol_full
9594 will set the demangled name to the result of dwarf2_full_name, and it is
9595 the demangled name that GDB uses if it exists. */
9596 if (cu
->language
== language_ada
9597 || (cu
->language
== language_fortran
&& physname
))
9599 /* For Ada unit, we prefer the linkage name over the name, as
9600 the former contains the exported name, which the user expects
9601 to be able to reference. Ideally, we want the user to be able
9602 to reference this entity using either natural or linkage name,
9603 but we haven't started looking at this enhancement yet. */
9604 const char *linkage_name
= dw2_linkage_name (die
, cu
);
9606 if (linkage_name
!= NULL
)
9607 return linkage_name
;
9610 /* These are the only languages we know how to qualify names in. */
9612 && (cu
->language
== language_cplus
9613 || cu
->language
== language_fortran
|| cu
->language
== language_d
9614 || cu
->language
== language_rust
))
9616 if (die_needs_namespace (die
, cu
))
9620 const char *canonical_name
= NULL
;
9624 prefix
= determine_prefix (die
, cu
);
9625 if (*prefix
!= '\0')
9627 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
9630 buf
.puts (prefixed_name
);
9631 xfree (prefixed_name
);
9636 /* Template parameters may be specified in the DIE's DW_AT_name, or
9637 as children with DW_TAG_template_type_param or
9638 DW_TAG_value_type_param. If the latter, add them to the name
9639 here. If the name already has template parameters, then
9640 skip this step; some versions of GCC emit both, and
9641 it is more efficient to use the pre-computed name.
9643 Something to keep in mind about this process: it is very
9644 unlikely, or in some cases downright impossible, to produce
9645 something that will match the mangled name of a function.
9646 If the definition of the function has the same debug info,
9647 we should be able to match up with it anyway. But fallbacks
9648 using the minimal symbol, for instance to find a method
9649 implemented in a stripped copy of libstdc++, will not work.
9650 If we do not have debug info for the definition, we will have to
9651 match them up some other way.
9653 When we do name matching there is a related problem with function
9654 templates; two instantiated function templates are allowed to
9655 differ only by their return types, which we do not add here. */
9657 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
9659 struct attribute
*attr
;
9660 struct die_info
*child
;
9663 die
->building_fullname
= 1;
9665 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
9669 const gdb_byte
*bytes
;
9670 struct dwarf2_locexpr_baton
*baton
;
9673 if (child
->tag
!= DW_TAG_template_type_param
9674 && child
->tag
!= DW_TAG_template_value_param
)
9685 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
9688 complaint (&symfile_complaints
,
9689 _("template parameter missing DW_AT_type"));
9690 buf
.puts ("UNKNOWN_TYPE");
9693 type
= die_type (child
, cu
);
9695 if (child
->tag
== DW_TAG_template_type_param
)
9697 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
9701 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
9704 complaint (&symfile_complaints
,
9705 _("template parameter missing "
9706 "DW_AT_const_value"));
9707 buf
.puts ("UNKNOWN_VALUE");
9711 dwarf2_const_value_attr (attr
, type
, name
,
9712 &cu
->comp_unit_obstack
, cu
,
9713 &value
, &bytes
, &baton
);
9715 if (TYPE_NOSIGN (type
))
9716 /* GDB prints characters as NUMBER 'CHAR'. If that's
9717 changed, this can use value_print instead. */
9718 c_printchar (value
, type
, &buf
);
9721 struct value_print_options opts
;
9724 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
9728 else if (bytes
!= NULL
)
9730 v
= allocate_value (type
);
9731 memcpy (value_contents_writeable (v
), bytes
,
9732 TYPE_LENGTH (type
));
9735 v
= value_from_longest (type
, value
);
9737 /* Specify decimal so that we do not depend on
9739 get_formatted_print_options (&opts
, 'd');
9741 value_print (v
, &buf
, &opts
);
9747 die
->building_fullname
= 0;
9751 /* Close the argument list, with a space if necessary
9752 (nested templates). */
9753 if (!buf
.empty () && buf
.string ().back () == '>')
9760 /* For C++ methods, append formal parameter type
9761 information, if PHYSNAME. */
9763 if (physname
&& die
->tag
== DW_TAG_subprogram
9764 && cu
->language
== language_cplus
)
9766 struct type
*type
= read_type_die (die
, cu
);
9768 c_type_print_args (type
, &buf
, 1, cu
->language
,
9769 &type_print_raw_options
);
9771 if (cu
->language
== language_cplus
)
9773 /* Assume that an artificial first parameter is
9774 "this", but do not crash if it is not. RealView
9775 marks unnamed (and thus unused) parameters as
9776 artificial; there is no way to differentiate
9778 if (TYPE_NFIELDS (type
) > 0
9779 && TYPE_FIELD_ARTIFICIAL (type
, 0)
9780 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
9781 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
9783 buf
.puts (" const");
9787 const std::string
&intermediate_name
= buf
.string ();
9789 if (cu
->language
== language_cplus
)
9791 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
9792 &objfile
->per_bfd
->storage_obstack
);
9794 /* If we only computed INTERMEDIATE_NAME, or if
9795 INTERMEDIATE_NAME is already canonical, then we need to
9796 copy it to the appropriate obstack. */
9797 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
9798 name
= ((const char *)
9799 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9800 intermediate_name
.c_str (),
9801 intermediate_name
.length ()));
9803 name
= canonical_name
;
9810 /* Return the fully qualified name of DIE, based on its DW_AT_name.
9811 If scope qualifiers are appropriate they will be added. The result
9812 will be allocated on the storage_obstack, or NULL if the DIE does
9813 not have a name. NAME may either be from a previous call to
9814 dwarf2_name or NULL.
9816 The output string will be canonicalized (if C++). */
9819 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9821 return dwarf2_compute_name (name
, die
, cu
, 0);
9824 /* Construct a physname for the given DIE in CU. NAME may either be
9825 from a previous call to dwarf2_name or NULL. The result will be
9826 allocated on the objfile_objstack or NULL if the DIE does not have a
9829 The output string will be canonicalized (if C++). */
9832 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9834 struct objfile
*objfile
= cu
->objfile
;
9835 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
9838 /* In this case dwarf2_compute_name is just a shortcut not building anything
9840 if (!die_needs_namespace (die
, cu
))
9841 return dwarf2_compute_name (name
, die
, cu
, 1);
9843 mangled
= dw2_linkage_name (die
, cu
);
9845 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
9846 See https://github.com/rust-lang/rust/issues/32925. */
9847 if (cu
->language
== language_rust
&& mangled
!= NULL
9848 && strchr (mangled
, '{') != NULL
)
9851 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
9853 gdb::unique_xmalloc_ptr
<char> demangled
;
9854 if (mangled
!= NULL
)
9856 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
9857 type. It is easier for GDB users to search for such functions as
9858 `name(params)' than `long name(params)'. In such case the minimal
9859 symbol names do not match the full symbol names but for template
9860 functions there is never a need to look up their definition from their
9861 declaration so the only disadvantage remains the minimal symbol
9862 variant `long name(params)' does not have the proper inferior type.
9865 if (cu
->language
== language_go
)
9867 /* This is a lie, but we already lie to the caller new_symbol_full.
9868 new_symbol_full assumes we return the mangled name.
9869 This just undoes that lie until things are cleaned up. */
9873 demangled
.reset (gdb_demangle (mangled
,
9874 (DMGL_PARAMS
| DMGL_ANSI
9878 canon
= demangled
.get ();
9886 if (canon
== NULL
|| check_physname
)
9888 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
9890 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
9892 /* It may not mean a bug in GDB. The compiler could also
9893 compute DW_AT_linkage_name incorrectly. But in such case
9894 GDB would need to be bug-to-bug compatible. */
9896 complaint (&symfile_complaints
,
9897 _("Computed physname <%s> does not match demangled <%s> "
9898 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
9899 physname
, canon
, mangled
, to_underlying (die
->sect_off
),
9900 objfile_name (objfile
));
9902 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
9903 is available here - over computed PHYSNAME. It is safer
9904 against both buggy GDB and buggy compilers. */
9918 retval
= ((const char *)
9919 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9920 retval
, strlen (retval
)));
9925 /* Inspect DIE in CU for a namespace alias. If one exists, record
9926 a new symbol for it.
9928 Returns 1 if a namespace alias was recorded, 0 otherwise. */
9931 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
9933 struct attribute
*attr
;
9935 /* If the die does not have a name, this is not a namespace
9937 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9941 struct die_info
*d
= die
;
9942 struct dwarf2_cu
*imported_cu
= cu
;
9944 /* If the compiler has nested DW_AT_imported_declaration DIEs,
9945 keep inspecting DIEs until we hit the underlying import. */
9946 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
9947 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
9949 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
9953 d
= follow_die_ref (d
, attr
, &imported_cu
);
9954 if (d
->tag
!= DW_TAG_imported_declaration
)
9958 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
9960 complaint (&symfile_complaints
,
9961 _("DIE at 0x%x has too many recursively imported "
9962 "declarations"), to_underlying (d
->sect_off
));
9969 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9971 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
9972 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
9974 /* This declaration is a global namespace alias. Add
9975 a symbol for it whose type is the aliased namespace. */
9976 new_symbol (die
, type
, cu
);
9985 /* Return the using directives repository (global or local?) to use in the
9986 current context for LANGUAGE.
9988 For Ada, imported declarations can materialize renamings, which *may* be
9989 global. However it is impossible (for now?) in DWARF to distinguish
9990 "external" imported declarations and "static" ones. As all imported
9991 declarations seem to be static in all other languages, make them all CU-wide
9992 global only in Ada. */
9994 static struct using_direct
**
9995 using_directives (enum language language
)
9997 if (language
== language_ada
&& context_stack_depth
== 0)
9998 return &global_using_directives
;
10000 return &local_using_directives
;
10003 /* Read the import statement specified by the given die and record it. */
10006 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10008 struct objfile
*objfile
= cu
->objfile
;
10009 struct attribute
*import_attr
;
10010 struct die_info
*imported_die
, *child_die
;
10011 struct dwarf2_cu
*imported_cu
;
10012 const char *imported_name
;
10013 const char *imported_name_prefix
;
10014 const char *canonical_name
;
10015 const char *import_alias
;
10016 const char *imported_declaration
= NULL
;
10017 const char *import_prefix
;
10018 std::vector
<const char *> excludes
;
10020 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10021 if (import_attr
== NULL
)
10023 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
10024 dwarf_tag_name (die
->tag
));
10029 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10030 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10031 if (imported_name
== NULL
)
10033 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10035 The import in the following code:
10049 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10050 <52> DW_AT_decl_file : 1
10051 <53> DW_AT_decl_line : 6
10052 <54> DW_AT_import : <0x75>
10053 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10054 <59> DW_AT_name : B
10055 <5b> DW_AT_decl_file : 1
10056 <5c> DW_AT_decl_line : 2
10057 <5d> DW_AT_type : <0x6e>
10059 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10060 <76> DW_AT_byte_size : 4
10061 <77> DW_AT_encoding : 5 (signed)
10063 imports the wrong die ( 0x75 instead of 0x58 ).
10064 This case will be ignored until the gcc bug is fixed. */
10068 /* Figure out the local name after import. */
10069 import_alias
= dwarf2_name (die
, cu
);
10071 /* Figure out where the statement is being imported to. */
10072 import_prefix
= determine_prefix (die
, cu
);
10074 /* Figure out what the scope of the imported die is and prepend it
10075 to the name of the imported die. */
10076 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10078 if (imported_die
->tag
!= DW_TAG_namespace
10079 && imported_die
->tag
!= DW_TAG_module
)
10081 imported_declaration
= imported_name
;
10082 canonical_name
= imported_name_prefix
;
10084 else if (strlen (imported_name_prefix
) > 0)
10085 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10086 imported_name_prefix
,
10087 (cu
->language
== language_d
? "." : "::"),
10088 imported_name
, (char *) NULL
);
10090 canonical_name
= imported_name
;
10092 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10093 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10094 child_die
= sibling_die (child_die
))
10096 /* DWARF-4: A Fortran use statement with a “rename list” may be
10097 represented by an imported module entry with an import attribute
10098 referring to the module and owned entries corresponding to those
10099 entities that are renamed as part of being imported. */
10101 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10103 complaint (&symfile_complaints
,
10104 _("child DW_TAG_imported_declaration expected "
10105 "- DIE at 0x%x [in module %s]"),
10106 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
10110 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10111 if (import_attr
== NULL
)
10113 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
10114 dwarf_tag_name (child_die
->tag
));
10119 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10121 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10122 if (imported_name
== NULL
)
10124 complaint (&symfile_complaints
,
10125 _("child DW_TAG_imported_declaration has unknown "
10126 "imported name - DIE at 0x%x [in module %s]"),
10127 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
10131 excludes
.push_back (imported_name
);
10133 process_die (child_die
, cu
);
10136 add_using_directive (using_directives (cu
->language
),
10140 imported_declaration
,
10143 &objfile
->objfile_obstack
);
10146 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10147 types, but gives them a size of zero. Starting with version 14,
10148 ICC is compatible with GCC. */
10151 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10153 if (!cu
->checked_producer
)
10154 check_producer (cu
);
10156 return cu
->producer_is_icc_lt_14
;
10159 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10160 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10161 this, it was first present in GCC release 4.3.0. */
10164 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10166 if (!cu
->checked_producer
)
10167 check_producer (cu
);
10169 return cu
->producer_is_gcc_lt_4_3
;
10172 static file_and_directory
10173 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10175 file_and_directory res
;
10177 /* Find the filename. Do not use dwarf2_name here, since the filename
10178 is not a source language identifier. */
10179 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10180 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10182 if (res
.comp_dir
== NULL
10183 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10184 && IS_ABSOLUTE_PATH (res
.name
))
10186 res
.comp_dir_storage
= ldirname (res
.name
);
10187 if (!res
.comp_dir_storage
.empty ())
10188 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10190 if (res
.comp_dir
!= NULL
)
10192 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10193 directory, get rid of it. */
10194 const char *cp
= strchr (res
.comp_dir
, ':');
10196 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10197 res
.comp_dir
= cp
+ 1;
10200 if (res
.name
== NULL
)
10201 res
.name
= "<unknown>";
10206 /* Handle DW_AT_stmt_list for a compilation unit.
10207 DIE is the DW_TAG_compile_unit die for CU.
10208 COMP_DIR is the compilation directory. LOWPC is passed to
10209 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10212 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10213 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10215 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10216 struct attribute
*attr
;
10217 struct line_header line_header_local
;
10218 hashval_t line_header_local_hash
;
10221 int decode_mapping
;
10223 gdb_assert (! cu
->per_cu
->is_debug_types
);
10225 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10229 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10231 /* The line header hash table is only created if needed (it exists to
10232 prevent redundant reading of the line table for partial_units).
10233 If we're given a partial_unit, we'll need it. If we're given a
10234 compile_unit, then use the line header hash table if it's already
10235 created, but don't create one just yet. */
10237 if (dwarf2_per_objfile
->line_header_hash
== NULL
10238 && die
->tag
== DW_TAG_partial_unit
)
10240 dwarf2_per_objfile
->line_header_hash
10241 = htab_create_alloc_ex (127, line_header_hash_voidp
,
10242 line_header_eq_voidp
,
10243 free_line_header_voidp
,
10244 &objfile
->objfile_obstack
,
10245 hashtab_obstack_allocate
,
10246 dummy_obstack_deallocate
);
10249 line_header_local
.sect_off
= line_offset
;
10250 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10251 line_header_local_hash
= line_header_hash (&line_header_local
);
10252 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10254 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
10255 &line_header_local
,
10256 line_header_local_hash
, NO_INSERT
);
10258 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10259 is not present in *SLOT (since if there is something in *SLOT then
10260 it will be for a partial_unit). */
10261 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10263 gdb_assert (*slot
!= NULL
);
10264 cu
->line_header
= (struct line_header
*) *slot
;
10269 /* dwarf_decode_line_header does not yet provide sufficient information.
10270 We always have to call also dwarf_decode_lines for it. */
10271 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10275 cu
->line_header
= lh
.release ();
10276 cu
->line_header_die_owner
= die
;
10278 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10282 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
10283 &line_header_local
,
10284 line_header_local_hash
, INSERT
);
10285 gdb_assert (slot
!= NULL
);
10287 if (slot
!= NULL
&& *slot
== NULL
)
10289 /* This newly decoded line number information unit will be owned
10290 by line_header_hash hash table. */
10291 *slot
= cu
->line_header
;
10292 cu
->line_header_die_owner
= NULL
;
10296 /* We cannot free any current entry in (*slot) as that struct line_header
10297 may be already used by multiple CUs. Create only temporary decoded
10298 line_header for this CU - it may happen at most once for each line
10299 number information unit. And if we're not using line_header_hash
10300 then this is what we want as well. */
10301 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10303 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10304 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10309 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10312 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10314 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10315 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10316 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10317 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10318 struct attribute
*attr
;
10319 struct die_info
*child_die
;
10320 CORE_ADDR baseaddr
;
10322 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10324 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10326 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10327 from finish_block. */
10328 if (lowpc
== ((CORE_ADDR
) -1))
10330 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10332 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10334 prepare_one_comp_unit (cu
, die
, cu
->language
);
10336 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10337 standardised yet. As a workaround for the language detection we fall
10338 back to the DW_AT_producer string. */
10339 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10340 cu
->language
= language_opencl
;
10342 /* Similar hack for Go. */
10343 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10344 set_cu_language (DW_LANG_Go
, cu
);
10346 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
10348 /* Decode line number information if present. We do this before
10349 processing child DIEs, so that the line header table is available
10350 for DW_AT_decl_file. */
10351 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10353 /* Process all dies in compilation unit. */
10354 if (die
->child
!= NULL
)
10356 child_die
= die
->child
;
10357 while (child_die
&& child_die
->tag
)
10359 process_die (child_die
, cu
);
10360 child_die
= sibling_die (child_die
);
10364 /* Decode macro information, if present. Dwarf 2 macro information
10365 refers to information in the line number info statement program
10366 header, so we can only read it if we've read the header
10368 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10370 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10371 if (attr
&& cu
->line_header
)
10373 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10374 complaint (&symfile_complaints
,
10375 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10377 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10381 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10382 if (attr
&& cu
->line_header
)
10384 unsigned int macro_offset
= DW_UNSND (attr
);
10386 dwarf_decode_macros (cu
, macro_offset
, 0);
10391 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
10392 Create the set of symtabs used by this TU, or if this TU is sharing
10393 symtabs with another TU and the symtabs have already been created
10394 then restore those symtabs in the line header.
10395 We don't need the pc/line-number mapping for type units. */
10398 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
10400 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
10401 struct type_unit_group
*tu_group
;
10403 struct attribute
*attr
;
10405 struct signatured_type
*sig_type
;
10407 gdb_assert (per_cu
->is_debug_types
);
10408 sig_type
= (struct signatured_type
*) per_cu
;
10410 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10412 /* If we're using .gdb_index (includes -readnow) then
10413 per_cu->type_unit_group may not have been set up yet. */
10414 if (sig_type
->type_unit_group
== NULL
)
10415 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
10416 tu_group
= sig_type
->type_unit_group
;
10418 /* If we've already processed this stmt_list there's no real need to
10419 do it again, we could fake it and just recreate the part we need
10420 (file name,index -> symtab mapping). If data shows this optimization
10421 is useful we can do it then. */
10422 first_time
= tu_group
->compunit_symtab
== NULL
;
10424 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10429 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10430 lh
= dwarf_decode_line_header (line_offset
, cu
);
10435 dwarf2_start_symtab (cu
, "", NULL
, 0);
10438 gdb_assert (tu_group
->symtabs
== NULL
);
10439 restart_symtab (tu_group
->compunit_symtab
, "", 0);
10444 cu
->line_header
= lh
.release ();
10445 cu
->line_header_die_owner
= die
;
10449 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
10451 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10452 still initializing it, and our caller (a few levels up)
10453 process_full_type_unit still needs to know if this is the first
10456 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
10457 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
10458 cu
->line_header
->file_names
.size ());
10460 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
10462 file_entry
&fe
= cu
->line_header
->file_names
[i
];
10464 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
10466 if (current_subfile
->symtab
== NULL
)
10468 /* NOTE: start_subfile will recognize when it's been
10469 passed a file it has already seen. So we can't
10470 assume there's a simple mapping from
10471 cu->line_header->file_names to subfiles, plus
10472 cu->line_header->file_names may contain dups. */
10473 current_subfile
->symtab
10474 = allocate_symtab (cust
, current_subfile
->name
);
10477 fe
.symtab
= current_subfile
->symtab
;
10478 tu_group
->symtabs
[i
] = fe
.symtab
;
10483 restart_symtab (tu_group
->compunit_symtab
, "", 0);
10485 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
10487 file_entry
&fe
= cu
->line_header
->file_names
[i
];
10489 fe
.symtab
= tu_group
->symtabs
[i
];
10493 /* The main symtab is allocated last. Type units don't have DW_AT_name
10494 so they don't have a "real" (so to speak) symtab anyway.
10495 There is later code that will assign the main symtab to all symbols
10496 that don't have one. We need to handle the case of a symbol with a
10497 missing symtab (DW_AT_decl_file) anyway. */
10500 /* Process DW_TAG_type_unit.
10501 For TUs we want to skip the first top level sibling if it's not the
10502 actual type being defined by this TU. In this case the first top
10503 level sibling is there to provide context only. */
10506 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10508 struct die_info
*child_die
;
10510 prepare_one_comp_unit (cu
, die
, language_minimal
);
10512 /* Initialize (or reinitialize) the machinery for building symtabs.
10513 We do this before processing child DIEs, so that the line header table
10514 is available for DW_AT_decl_file. */
10515 setup_type_unit_groups (die
, cu
);
10517 if (die
->child
!= NULL
)
10519 child_die
= die
->child
;
10520 while (child_die
&& child_die
->tag
)
10522 process_die (child_die
, cu
);
10523 child_die
= sibling_die (child_die
);
10530 http://gcc.gnu.org/wiki/DebugFission
10531 http://gcc.gnu.org/wiki/DebugFissionDWP
10533 To simplify handling of both DWO files ("object" files with the DWARF info)
10534 and DWP files (a file with the DWOs packaged up into one file), we treat
10535 DWP files as having a collection of virtual DWO files. */
10538 hash_dwo_file (const void *item
)
10540 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
10543 hash
= htab_hash_string (dwo_file
->dwo_name
);
10544 if (dwo_file
->comp_dir
!= NULL
)
10545 hash
+= htab_hash_string (dwo_file
->comp_dir
);
10550 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
10552 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
10553 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
10555 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
10557 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
10558 return lhs
->comp_dir
== rhs
->comp_dir
;
10559 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
10562 /* Allocate a hash table for DWO files. */
10565 allocate_dwo_file_hash_table (void)
10567 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10569 return htab_create_alloc_ex (41,
10573 &objfile
->objfile_obstack
,
10574 hashtab_obstack_allocate
,
10575 dummy_obstack_deallocate
);
10578 /* Lookup DWO file DWO_NAME. */
10581 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
10583 struct dwo_file find_entry
;
10586 if (dwarf2_per_objfile
->dwo_files
== NULL
)
10587 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
10589 memset (&find_entry
, 0, sizeof (find_entry
));
10590 find_entry
.dwo_name
= dwo_name
;
10591 find_entry
.comp_dir
= comp_dir
;
10592 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
10598 hash_dwo_unit (const void *item
)
10600 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10602 /* This drops the top 32 bits of the id, but is ok for a hash. */
10603 return dwo_unit
->signature
;
10607 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
10609 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
10610 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
10612 /* The signature is assumed to be unique within the DWO file.
10613 So while object file CU dwo_id's always have the value zero,
10614 that's OK, assuming each object file DWO file has only one CU,
10615 and that's the rule for now. */
10616 return lhs
->signature
== rhs
->signature
;
10619 /* Allocate a hash table for DWO CUs,TUs.
10620 There is one of these tables for each of CUs,TUs for each DWO file. */
10623 allocate_dwo_unit_table (struct objfile
*objfile
)
10625 /* Start out with a pretty small number.
10626 Generally DWO files contain only one CU and maybe some TUs. */
10627 return htab_create_alloc_ex (3,
10631 &objfile
->objfile_obstack
,
10632 hashtab_obstack_allocate
,
10633 dummy_obstack_deallocate
);
10636 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
10638 struct create_dwo_cu_data
10640 struct dwo_file
*dwo_file
;
10641 struct dwo_unit dwo_unit
;
10644 /* die_reader_func for create_dwo_cu. */
10647 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
10648 const gdb_byte
*info_ptr
,
10649 struct die_info
*comp_unit_die
,
10653 struct dwarf2_cu
*cu
= reader
->cu
;
10654 sect_offset sect_off
= cu
->per_cu
->sect_off
;
10655 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
10656 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
10657 struct dwo_file
*dwo_file
= data
->dwo_file
;
10658 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
10659 struct attribute
*attr
;
10661 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
10664 complaint (&symfile_complaints
,
10665 _("Dwarf Error: debug entry at offset 0x%x is missing"
10666 " its dwo_id [in module %s]"),
10667 to_underlying (sect_off
), dwo_file
->dwo_name
);
10671 dwo_unit
->dwo_file
= dwo_file
;
10672 dwo_unit
->signature
= DW_UNSND (attr
);
10673 dwo_unit
->section
= section
;
10674 dwo_unit
->sect_off
= sect_off
;
10675 dwo_unit
->length
= cu
->per_cu
->length
;
10677 if (dwarf_read_debug
)
10678 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
10679 to_underlying (sect_off
),
10680 hex_string (dwo_unit
->signature
));
10683 /* Create the dwo_units for the CUs in a DWO_FILE.
10684 Note: This function processes DWO files only, not DWP files. */
10687 create_cus_hash_table (struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
10690 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10691 const struct dwarf2_section_info
*abbrev_section
= &dwo_file
.sections
.abbrev
;
10692 const gdb_byte
*info_ptr
, *end_ptr
;
10694 dwarf2_read_section (objfile
, §ion
);
10695 info_ptr
= section
.buffer
;
10697 if (info_ptr
== NULL
)
10700 if (dwarf_read_debug
)
10702 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
10703 get_section_name (§ion
),
10704 get_section_file_name (§ion
));
10707 end_ptr
= info_ptr
+ section
.size
;
10708 while (info_ptr
< end_ptr
)
10710 struct dwarf2_per_cu_data per_cu
;
10711 struct create_dwo_cu_data create_dwo_cu_data
;
10712 struct dwo_unit
*dwo_unit
;
10714 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
10716 memset (&create_dwo_cu_data
.dwo_unit
, 0,
10717 sizeof (create_dwo_cu_data
.dwo_unit
));
10718 memset (&per_cu
, 0, sizeof (per_cu
));
10719 per_cu
.objfile
= objfile
;
10720 per_cu
.is_debug_types
= 0;
10721 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
10722 per_cu
.section
= §ion
;
10723 create_dwo_cu_data
.dwo_file
= &dwo_file
;
10725 init_cutu_and_read_dies_no_follow (
10726 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
10727 info_ptr
+= per_cu
.length
;
10729 // If the unit could not be parsed, skip it.
10730 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
10733 if (cus_htab
== NULL
)
10734 cus_htab
= allocate_dwo_unit_table (objfile
);
10736 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10737 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
10738 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
10739 gdb_assert (slot
!= NULL
);
10742 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
10743 sect_offset dup_sect_off
= dup_cu
->sect_off
;
10745 complaint (&symfile_complaints
,
10746 _("debug cu entry at offset 0x%x is duplicate to"
10747 " the entry at offset 0x%x, signature %s"),
10748 to_underlying (sect_off
), to_underlying (dup_sect_off
),
10749 hex_string (dwo_unit
->signature
));
10751 *slot
= (void *)dwo_unit
;
10755 /* DWP file .debug_{cu,tu}_index section format:
10756 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
10760 Both index sections have the same format, and serve to map a 64-bit
10761 signature to a set of section numbers. Each section begins with a header,
10762 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
10763 indexes, and a pool of 32-bit section numbers. The index sections will be
10764 aligned at 8-byte boundaries in the file.
10766 The index section header consists of:
10768 V, 32 bit version number
10770 N, 32 bit number of compilation units or type units in the index
10771 M, 32 bit number of slots in the hash table
10773 Numbers are recorded using the byte order of the application binary.
10775 The hash table begins at offset 16 in the section, and consists of an array
10776 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
10777 order of the application binary). Unused slots in the hash table are 0.
10778 (We rely on the extreme unlikeliness of a signature being exactly 0.)
10780 The parallel table begins immediately after the hash table
10781 (at offset 16 + 8 * M from the beginning of the section), and consists of an
10782 array of 32-bit indexes (using the byte order of the application binary),
10783 corresponding 1-1 with slots in the hash table. Each entry in the parallel
10784 table contains a 32-bit index into the pool of section numbers. For unused
10785 hash table slots, the corresponding entry in the parallel table will be 0.
10787 The pool of section numbers begins immediately following the hash table
10788 (at offset 16 + 12 * M from the beginning of the section). The pool of
10789 section numbers consists of an array of 32-bit words (using the byte order
10790 of the application binary). Each item in the array is indexed starting
10791 from 0. The hash table entry provides the index of the first section
10792 number in the set. Additional section numbers in the set follow, and the
10793 set is terminated by a 0 entry (section number 0 is not used in ELF).
10795 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
10796 section must be the first entry in the set, and the .debug_abbrev.dwo must
10797 be the second entry. Other members of the set may follow in any order.
10803 DWP Version 2 combines all the .debug_info, etc. sections into one,
10804 and the entries in the index tables are now offsets into these sections.
10805 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
10808 Index Section Contents:
10810 Hash Table of Signatures dwp_hash_table.hash_table
10811 Parallel Table of Indices dwp_hash_table.unit_table
10812 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
10813 Table of Section Sizes dwp_hash_table.v2.sizes
10815 The index section header consists of:
10817 V, 32 bit version number
10818 L, 32 bit number of columns in the table of section offsets
10819 N, 32 bit number of compilation units or type units in the index
10820 M, 32 bit number of slots in the hash table
10822 Numbers are recorded using the byte order of the application binary.
10824 The hash table has the same format as version 1.
10825 The parallel table of indices has the same format as version 1,
10826 except that the entries are origin-1 indices into the table of sections
10827 offsets and the table of section sizes.
10829 The table of offsets begins immediately following the parallel table
10830 (at offset 16 + 12 * M from the beginning of the section). The table is
10831 a two-dimensional array of 32-bit words (using the byte order of the
10832 application binary), with L columns and N+1 rows, in row-major order.
10833 Each row in the array is indexed starting from 0. The first row provides
10834 a key to the remaining rows: each column in this row provides an identifier
10835 for a debug section, and the offsets in the same column of subsequent rows
10836 refer to that section. The section identifiers are:
10838 DW_SECT_INFO 1 .debug_info.dwo
10839 DW_SECT_TYPES 2 .debug_types.dwo
10840 DW_SECT_ABBREV 3 .debug_abbrev.dwo
10841 DW_SECT_LINE 4 .debug_line.dwo
10842 DW_SECT_LOC 5 .debug_loc.dwo
10843 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
10844 DW_SECT_MACINFO 7 .debug_macinfo.dwo
10845 DW_SECT_MACRO 8 .debug_macro.dwo
10847 The offsets provided by the CU and TU index sections are the base offsets
10848 for the contributions made by each CU or TU to the corresponding section
10849 in the package file. Each CU and TU header contains an abbrev_offset
10850 field, used to find the abbreviations table for that CU or TU within the
10851 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
10852 be interpreted as relative to the base offset given in the index section.
10853 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
10854 should be interpreted as relative to the base offset for .debug_line.dwo,
10855 and offsets into other debug sections obtained from DWARF attributes should
10856 also be interpreted as relative to the corresponding base offset.
10858 The table of sizes begins immediately following the table of offsets.
10859 Like the table of offsets, it is a two-dimensional array of 32-bit words,
10860 with L columns and N rows, in row-major order. Each row in the array is
10861 indexed starting from 1 (row 0 is shared by the two tables).
10865 Hash table lookup is handled the same in version 1 and 2:
10867 We assume that N and M will not exceed 2^32 - 1.
10868 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
10870 Given a 64-bit compilation unit signature or a type signature S, an entry
10871 in the hash table is located as follows:
10873 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
10874 the low-order k bits all set to 1.
10876 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
10878 3) If the hash table entry at index H matches the signature, use that
10879 entry. If the hash table entry at index H is unused (all zeroes),
10880 terminate the search: the signature is not present in the table.
10882 4) Let H = (H + H') modulo M. Repeat at Step 3.
10884 Because M > N and H' and M are relatively prime, the search is guaranteed
10885 to stop at an unused slot or find the match. */
10887 /* Create a hash table to map DWO IDs to their CU/TU entry in
10888 .debug_{info,types}.dwo in DWP_FILE.
10889 Returns NULL if there isn't one.
10890 Note: This function processes DWP files only, not DWO files. */
10892 static struct dwp_hash_table
*
10893 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
10895 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10896 bfd
*dbfd
= dwp_file
->dbfd
;
10897 const gdb_byte
*index_ptr
, *index_end
;
10898 struct dwarf2_section_info
*index
;
10899 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
10900 struct dwp_hash_table
*htab
;
10902 if (is_debug_types
)
10903 index
= &dwp_file
->sections
.tu_index
;
10905 index
= &dwp_file
->sections
.cu_index
;
10907 if (dwarf2_section_empty_p (index
))
10909 dwarf2_read_section (objfile
, index
);
10911 index_ptr
= index
->buffer
;
10912 index_end
= index_ptr
+ index
->size
;
10914 version
= read_4_bytes (dbfd
, index_ptr
);
10917 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
10921 nr_units
= read_4_bytes (dbfd
, index_ptr
);
10923 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
10926 if (version
!= 1 && version
!= 2)
10928 error (_("Dwarf Error: unsupported DWP file version (%s)"
10929 " [in module %s]"),
10930 pulongest (version
), dwp_file
->name
);
10932 if (nr_slots
!= (nr_slots
& -nr_slots
))
10934 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
10935 " is not power of 2 [in module %s]"),
10936 pulongest (nr_slots
), dwp_file
->name
);
10939 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
10940 htab
->version
= version
;
10941 htab
->nr_columns
= nr_columns
;
10942 htab
->nr_units
= nr_units
;
10943 htab
->nr_slots
= nr_slots
;
10944 htab
->hash_table
= index_ptr
;
10945 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
10947 /* Exit early if the table is empty. */
10948 if (nr_slots
== 0 || nr_units
== 0
10949 || (version
== 2 && nr_columns
== 0))
10951 /* All must be zero. */
10952 if (nr_slots
!= 0 || nr_units
!= 0
10953 || (version
== 2 && nr_columns
!= 0))
10955 complaint (&symfile_complaints
,
10956 _("Empty DWP but nr_slots,nr_units,nr_columns not"
10957 " all zero [in modules %s]"),
10965 htab
->section_pool
.v1
.indices
=
10966 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10967 /* It's harder to decide whether the section is too small in v1.
10968 V1 is deprecated anyway so we punt. */
10972 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10973 int *ids
= htab
->section_pool
.v2
.section_ids
;
10974 /* Reverse map for error checking. */
10975 int ids_seen
[DW_SECT_MAX
+ 1];
10978 if (nr_columns
< 2)
10980 error (_("Dwarf Error: bad DWP hash table, too few columns"
10981 " in section table [in module %s]"),
10984 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
10986 error (_("Dwarf Error: bad DWP hash table, too many columns"
10987 " in section table [in module %s]"),
10990 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10991 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10992 for (i
= 0; i
< nr_columns
; ++i
)
10994 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
10996 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
10998 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
10999 " in section table [in module %s]"),
11000 id
, dwp_file
->name
);
11002 if (ids_seen
[id
] != -1)
11004 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11005 " id %d in section table [in module %s]"),
11006 id
, dwp_file
->name
);
11011 /* Must have exactly one info or types section. */
11012 if (((ids_seen
[DW_SECT_INFO
] != -1)
11013 + (ids_seen
[DW_SECT_TYPES
] != -1))
11016 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11017 " DWO info/types section [in module %s]"),
11020 /* Must have an abbrev section. */
11021 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11023 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11024 " section [in module %s]"),
11027 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11028 htab
->section_pool
.v2
.sizes
=
11029 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11030 * nr_units
* nr_columns
);
11031 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11032 * nr_units
* nr_columns
))
11035 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11036 " [in module %s]"),
11044 /* Update SECTIONS with the data from SECTP.
11046 This function is like the other "locate" section routines that are
11047 passed to bfd_map_over_sections, but in this context the sections to
11048 read comes from the DWP V1 hash table, not the full ELF section table.
11050 The result is non-zero for success, or zero if an error was found. */
11053 locate_v1_virtual_dwo_sections (asection
*sectp
,
11054 struct virtual_v1_dwo_sections
*sections
)
11056 const struct dwop_section_names
*names
= &dwop_section_names
;
11058 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11060 /* There can be only one. */
11061 if (sections
->abbrev
.s
.section
!= NULL
)
11063 sections
->abbrev
.s
.section
= sectp
;
11064 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
11066 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11067 || section_is_p (sectp
->name
, &names
->types_dwo
))
11069 /* There can be only one. */
11070 if (sections
->info_or_types
.s
.section
!= NULL
)
11072 sections
->info_or_types
.s
.section
= sectp
;
11073 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
11075 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11077 /* There can be only one. */
11078 if (sections
->line
.s
.section
!= NULL
)
11080 sections
->line
.s
.section
= sectp
;
11081 sections
->line
.size
= bfd_get_section_size (sectp
);
11083 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11085 /* There can be only one. */
11086 if (sections
->loc
.s
.section
!= NULL
)
11088 sections
->loc
.s
.section
= sectp
;
11089 sections
->loc
.size
= bfd_get_section_size (sectp
);
11091 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11093 /* There can be only one. */
11094 if (sections
->macinfo
.s
.section
!= NULL
)
11096 sections
->macinfo
.s
.section
= sectp
;
11097 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
11099 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11101 /* There can be only one. */
11102 if (sections
->macro
.s
.section
!= NULL
)
11104 sections
->macro
.s
.section
= sectp
;
11105 sections
->macro
.size
= bfd_get_section_size (sectp
);
11107 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11109 /* There can be only one. */
11110 if (sections
->str_offsets
.s
.section
!= NULL
)
11112 sections
->str_offsets
.s
.section
= sectp
;
11113 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
11117 /* No other kind of section is valid. */
11124 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11125 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11126 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11127 This is for DWP version 1 files. */
11129 static struct dwo_unit
*
11130 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
11131 uint32_t unit_index
,
11132 const char *comp_dir
,
11133 ULONGEST signature
, int is_debug_types
)
11135 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11136 const struct dwp_hash_table
*dwp_htab
=
11137 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11138 bfd
*dbfd
= dwp_file
->dbfd
;
11139 const char *kind
= is_debug_types
? "TU" : "CU";
11140 struct dwo_file
*dwo_file
;
11141 struct dwo_unit
*dwo_unit
;
11142 struct virtual_v1_dwo_sections sections
;
11143 void **dwo_file_slot
;
11146 gdb_assert (dwp_file
->version
== 1);
11148 if (dwarf_read_debug
)
11150 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11152 pulongest (unit_index
), hex_string (signature
),
11156 /* Fetch the sections of this DWO unit.
11157 Put a limit on the number of sections we look for so that bad data
11158 doesn't cause us to loop forever. */
11160 #define MAX_NR_V1_DWO_SECTIONS \
11161 (1 /* .debug_info or .debug_types */ \
11162 + 1 /* .debug_abbrev */ \
11163 + 1 /* .debug_line */ \
11164 + 1 /* .debug_loc */ \
11165 + 1 /* .debug_str_offsets */ \
11166 + 1 /* .debug_macro or .debug_macinfo */ \
11167 + 1 /* trailing zero */)
11169 memset (§ions
, 0, sizeof (sections
));
11171 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11174 uint32_t section_nr
=
11175 read_4_bytes (dbfd
,
11176 dwp_htab
->section_pool
.v1
.indices
11177 + (unit_index
+ i
) * sizeof (uint32_t));
11179 if (section_nr
== 0)
11181 if (section_nr
>= dwp_file
->num_sections
)
11183 error (_("Dwarf Error: bad DWP hash table, section number too large"
11184 " [in module %s]"),
11188 sectp
= dwp_file
->elf_sections
[section_nr
];
11189 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11191 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11192 " [in module %s]"),
11198 || dwarf2_section_empty_p (§ions
.info_or_types
)
11199 || dwarf2_section_empty_p (§ions
.abbrev
))
11201 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11202 " [in module %s]"),
11205 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11207 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11208 " [in module %s]"),
11212 /* It's easier for the rest of the code if we fake a struct dwo_file and
11213 have dwo_unit "live" in that. At least for now.
11215 The DWP file can be made up of a random collection of CUs and TUs.
11216 However, for each CU + set of TUs that came from the same original DWO
11217 file, we can combine them back into a virtual DWO file to save space
11218 (fewer struct dwo_file objects to allocate). Remember that for really
11219 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11221 std::string virtual_dwo_name
=
11222 string_printf ("virtual-dwo/%d-%d-%d-%d",
11223 get_section_id (§ions
.abbrev
),
11224 get_section_id (§ions
.line
),
11225 get_section_id (§ions
.loc
),
11226 get_section_id (§ions
.str_offsets
));
11227 /* Can we use an existing virtual DWO file? */
11228 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
11229 /* Create one if necessary. */
11230 if (*dwo_file_slot
== NULL
)
11232 if (dwarf_read_debug
)
11234 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11235 virtual_dwo_name
.c_str ());
11237 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11239 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
11240 virtual_dwo_name
.c_str (),
11241 virtual_dwo_name
.size ());
11242 dwo_file
->comp_dir
= comp_dir
;
11243 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11244 dwo_file
->sections
.line
= sections
.line
;
11245 dwo_file
->sections
.loc
= sections
.loc
;
11246 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11247 dwo_file
->sections
.macro
= sections
.macro
;
11248 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11249 /* The "str" section is global to the entire DWP file. */
11250 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11251 /* The info or types section is assigned below to dwo_unit,
11252 there's no need to record it in dwo_file.
11253 Also, we can't simply record type sections in dwo_file because
11254 we record a pointer into the vector in dwo_unit. As we collect more
11255 types we'll grow the vector and eventually have to reallocate space
11256 for it, invalidating all copies of pointers into the previous
11258 *dwo_file_slot
= dwo_file
;
11262 if (dwarf_read_debug
)
11264 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11265 virtual_dwo_name
.c_str ());
11267 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11270 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11271 dwo_unit
->dwo_file
= dwo_file
;
11272 dwo_unit
->signature
= signature
;
11273 dwo_unit
->section
=
11274 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11275 *dwo_unit
->section
= sections
.info_or_types
;
11276 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11281 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11282 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11283 piece within that section used by a TU/CU, return a virtual section
11284 of just that piece. */
11286 static struct dwarf2_section_info
11287 create_dwp_v2_section (struct dwarf2_section_info
*section
,
11288 bfd_size_type offset
, bfd_size_type size
)
11290 struct dwarf2_section_info result
;
11293 gdb_assert (section
!= NULL
);
11294 gdb_assert (!section
->is_virtual
);
11296 memset (&result
, 0, sizeof (result
));
11297 result
.s
.containing_section
= section
;
11298 result
.is_virtual
= 1;
11303 sectp
= get_section_bfd_section (section
);
11305 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11306 bounds of the real section. This is a pretty-rare event, so just
11307 flag an error (easier) instead of a warning and trying to cope. */
11309 || offset
+ size
> bfd_get_section_size (sectp
))
11311 bfd
*abfd
= sectp
->owner
;
11313 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11314 " in section %s [in module %s]"),
11315 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
11316 objfile_name (dwarf2_per_objfile
->objfile
));
11319 result
.virtual_offset
= offset
;
11320 result
.size
= size
;
11324 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11325 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11326 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11327 This is for DWP version 2 files. */
11329 static struct dwo_unit
*
11330 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
11331 uint32_t unit_index
,
11332 const char *comp_dir
,
11333 ULONGEST signature
, int is_debug_types
)
11335 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11336 const struct dwp_hash_table
*dwp_htab
=
11337 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11338 bfd
*dbfd
= dwp_file
->dbfd
;
11339 const char *kind
= is_debug_types
? "TU" : "CU";
11340 struct dwo_file
*dwo_file
;
11341 struct dwo_unit
*dwo_unit
;
11342 struct virtual_v2_dwo_sections sections
;
11343 void **dwo_file_slot
;
11346 gdb_assert (dwp_file
->version
== 2);
11348 if (dwarf_read_debug
)
11350 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11352 pulongest (unit_index
), hex_string (signature
),
11356 /* Fetch the section offsets of this DWO unit. */
11358 memset (§ions
, 0, sizeof (sections
));
11360 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11362 uint32_t offset
= read_4_bytes (dbfd
,
11363 dwp_htab
->section_pool
.v2
.offsets
11364 + (((unit_index
- 1) * dwp_htab
->nr_columns
11366 * sizeof (uint32_t)));
11367 uint32_t size
= read_4_bytes (dbfd
,
11368 dwp_htab
->section_pool
.v2
.sizes
11369 + (((unit_index
- 1) * dwp_htab
->nr_columns
11371 * sizeof (uint32_t)));
11373 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11376 case DW_SECT_TYPES
:
11377 sections
.info_or_types_offset
= offset
;
11378 sections
.info_or_types_size
= size
;
11380 case DW_SECT_ABBREV
:
11381 sections
.abbrev_offset
= offset
;
11382 sections
.abbrev_size
= size
;
11385 sections
.line_offset
= offset
;
11386 sections
.line_size
= size
;
11389 sections
.loc_offset
= offset
;
11390 sections
.loc_size
= size
;
11392 case DW_SECT_STR_OFFSETS
:
11393 sections
.str_offsets_offset
= offset
;
11394 sections
.str_offsets_size
= size
;
11396 case DW_SECT_MACINFO
:
11397 sections
.macinfo_offset
= offset
;
11398 sections
.macinfo_size
= size
;
11400 case DW_SECT_MACRO
:
11401 sections
.macro_offset
= offset
;
11402 sections
.macro_size
= size
;
11407 /* It's easier for the rest of the code if we fake a struct dwo_file and
11408 have dwo_unit "live" in that. At least for now.
11410 The DWP file can be made up of a random collection of CUs and TUs.
11411 However, for each CU + set of TUs that came from the same original DWO
11412 file, we can combine them back into a virtual DWO file to save space
11413 (fewer struct dwo_file objects to allocate). Remember that for really
11414 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11416 std::string virtual_dwo_name
=
11417 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11418 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11419 (long) (sections
.line_size
? sections
.line_offset
: 0),
11420 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11421 (long) (sections
.str_offsets_size
11422 ? sections
.str_offsets_offset
: 0));
11423 /* Can we use an existing virtual DWO file? */
11424 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
11425 /* Create one if necessary. */
11426 if (*dwo_file_slot
== NULL
)
11428 if (dwarf_read_debug
)
11430 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11431 virtual_dwo_name
.c_str ());
11433 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11435 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
11436 virtual_dwo_name
.c_str (),
11437 virtual_dwo_name
.size ());
11438 dwo_file
->comp_dir
= comp_dir
;
11439 dwo_file
->sections
.abbrev
=
11440 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
11441 sections
.abbrev_offset
, sections
.abbrev_size
);
11442 dwo_file
->sections
.line
=
11443 create_dwp_v2_section (&dwp_file
->sections
.line
,
11444 sections
.line_offset
, sections
.line_size
);
11445 dwo_file
->sections
.loc
=
11446 create_dwp_v2_section (&dwp_file
->sections
.loc
,
11447 sections
.loc_offset
, sections
.loc_size
);
11448 dwo_file
->sections
.macinfo
=
11449 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
11450 sections
.macinfo_offset
, sections
.macinfo_size
);
11451 dwo_file
->sections
.macro
=
11452 create_dwp_v2_section (&dwp_file
->sections
.macro
,
11453 sections
.macro_offset
, sections
.macro_size
);
11454 dwo_file
->sections
.str_offsets
=
11455 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
11456 sections
.str_offsets_offset
,
11457 sections
.str_offsets_size
);
11458 /* The "str" section is global to the entire DWP file. */
11459 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11460 /* The info or types section is assigned below to dwo_unit,
11461 there's no need to record it in dwo_file.
11462 Also, we can't simply record type sections in dwo_file because
11463 we record a pointer into the vector in dwo_unit. As we collect more
11464 types we'll grow the vector and eventually have to reallocate space
11465 for it, invalidating all copies of pointers into the previous
11467 *dwo_file_slot
= dwo_file
;
11471 if (dwarf_read_debug
)
11473 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11474 virtual_dwo_name
.c_str ());
11476 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11479 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11480 dwo_unit
->dwo_file
= dwo_file
;
11481 dwo_unit
->signature
= signature
;
11482 dwo_unit
->section
=
11483 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11484 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
11485 ? &dwp_file
->sections
.types
11486 : &dwp_file
->sections
.info
,
11487 sections
.info_or_types_offset
,
11488 sections
.info_or_types_size
);
11489 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11494 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
11495 Returns NULL if the signature isn't found. */
11497 static struct dwo_unit
*
11498 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
11499 ULONGEST signature
, int is_debug_types
)
11501 const struct dwp_hash_table
*dwp_htab
=
11502 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11503 bfd
*dbfd
= dwp_file
->dbfd
;
11504 uint32_t mask
= dwp_htab
->nr_slots
- 1;
11505 uint32_t hash
= signature
& mask
;
11506 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
11509 struct dwo_unit find_dwo_cu
;
11511 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
11512 find_dwo_cu
.signature
= signature
;
11513 slot
= htab_find_slot (is_debug_types
11514 ? dwp_file
->loaded_tus
11515 : dwp_file
->loaded_cus
,
11516 &find_dwo_cu
, INSERT
);
11519 return (struct dwo_unit
*) *slot
;
11521 /* Use a for loop so that we don't loop forever on bad debug info. */
11522 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
11524 ULONGEST signature_in_table
;
11526 signature_in_table
=
11527 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
11528 if (signature_in_table
== signature
)
11530 uint32_t unit_index
=
11531 read_4_bytes (dbfd
,
11532 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
11534 if (dwp_file
->version
== 1)
11536 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
11537 comp_dir
, signature
,
11542 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
11543 comp_dir
, signature
,
11546 return (struct dwo_unit
*) *slot
;
11548 if (signature_in_table
== 0)
11550 hash
= (hash
+ hash2
) & mask
;
11553 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
11554 " [in module %s]"),
11558 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
11559 Open the file specified by FILE_NAME and hand it off to BFD for
11560 preliminary analysis. Return a newly initialized bfd *, which
11561 includes a canonicalized copy of FILE_NAME.
11562 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
11563 SEARCH_CWD is true if the current directory is to be searched.
11564 It will be searched before debug-file-directory.
11565 If successful, the file is added to the bfd include table of the
11566 objfile's bfd (see gdb_bfd_record_inclusion).
11567 If unable to find/open the file, return NULL.
11568 NOTE: This function is derived from symfile_bfd_open. */
11570 static gdb_bfd_ref_ptr
11571 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
11574 char *absolute_name
;
11575 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
11576 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
11577 to debug_file_directory. */
11579 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
11583 if (*debug_file_directory
!= '\0')
11584 search_path
= concat (".", dirname_separator_string
,
11585 debug_file_directory
, (char *) NULL
);
11587 search_path
= xstrdup (".");
11590 search_path
= xstrdup (debug_file_directory
);
11592 flags
= OPF_RETURN_REALPATH
;
11594 flags
|= OPF_SEARCH_IN_PATH
;
11595 desc
= openp (search_path
, flags
, file_name
,
11596 O_RDONLY
| O_BINARY
, &absolute_name
);
11597 xfree (search_path
);
11601 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
11602 xfree (absolute_name
);
11603 if (sym_bfd
== NULL
)
11605 bfd_set_cacheable (sym_bfd
.get (), 1);
11607 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
11610 /* Success. Record the bfd as having been included by the objfile's bfd.
11611 This is important because things like demangled_names_hash lives in the
11612 objfile's per_bfd space and may have references to things like symbol
11613 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
11614 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
11619 /* Try to open DWO file FILE_NAME.
11620 COMP_DIR is the DW_AT_comp_dir attribute.
11621 The result is the bfd handle of the file.
11622 If there is a problem finding or opening the file, return NULL.
11623 Upon success, the canonicalized path of the file is stored in the bfd,
11624 same as symfile_bfd_open. */
11626 static gdb_bfd_ref_ptr
11627 open_dwo_file (const char *file_name
, const char *comp_dir
)
11629 if (IS_ABSOLUTE_PATH (file_name
))
11630 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
11632 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
11634 if (comp_dir
!= NULL
)
11636 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
11637 file_name
, (char *) NULL
);
11639 /* NOTE: If comp_dir is a relative path, this will also try the
11640 search path, which seems useful. */
11641 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
11642 1 /*search_cwd*/));
11643 xfree (path_to_try
);
11648 /* That didn't work, try debug-file-directory, which, despite its name,
11649 is a list of paths. */
11651 if (*debug_file_directory
== '\0')
11654 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
11657 /* This function is mapped across the sections and remembers the offset and
11658 size of each of the DWO debugging sections we are interested in. */
11661 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
11663 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
11664 const struct dwop_section_names
*names
= &dwop_section_names
;
11666 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11668 dwo_sections
->abbrev
.s
.section
= sectp
;
11669 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
11671 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11673 dwo_sections
->info
.s
.section
= sectp
;
11674 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
11676 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11678 dwo_sections
->line
.s
.section
= sectp
;
11679 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
11681 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11683 dwo_sections
->loc
.s
.section
= sectp
;
11684 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
11686 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11688 dwo_sections
->macinfo
.s
.section
= sectp
;
11689 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
11691 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11693 dwo_sections
->macro
.s
.section
= sectp
;
11694 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
11696 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
11698 dwo_sections
->str
.s
.section
= sectp
;
11699 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
11701 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11703 dwo_sections
->str_offsets
.s
.section
= sectp
;
11704 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
11706 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11708 struct dwarf2_section_info type_section
;
11710 memset (&type_section
, 0, sizeof (type_section
));
11711 type_section
.s
.section
= sectp
;
11712 type_section
.size
= bfd_get_section_size (sectp
);
11713 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
11718 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
11719 by PER_CU. This is for the non-DWP case.
11720 The result is NULL if DWO_NAME can't be found. */
11722 static struct dwo_file
*
11723 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
11724 const char *dwo_name
, const char *comp_dir
)
11726 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11727 struct dwo_file
*dwo_file
;
11728 struct cleanup
*cleanups
;
11730 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
11733 if (dwarf_read_debug
)
11734 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
11737 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11738 dwo_file
->dwo_name
= dwo_name
;
11739 dwo_file
->comp_dir
= comp_dir
;
11740 dwo_file
->dbfd
= dbfd
.release ();
11742 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
11744 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
11745 &dwo_file
->sections
);
11747 create_cus_hash_table (*dwo_file
, dwo_file
->sections
.info
, dwo_file
->cus
);
11749 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
11752 discard_cleanups (cleanups
);
11754 if (dwarf_read_debug
)
11755 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
11760 /* This function is mapped across the sections and remembers the offset and
11761 size of each of the DWP debugging sections common to version 1 and 2 that
11762 we are interested in. */
11765 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
11766 void *dwp_file_ptr
)
11768 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11769 const struct dwop_section_names
*names
= &dwop_section_names
;
11770 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11772 /* Record the ELF section number for later lookup: this is what the
11773 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11774 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11775 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11777 /* Look for specific sections that we need. */
11778 if (section_is_p (sectp
->name
, &names
->str_dwo
))
11780 dwp_file
->sections
.str
.s
.section
= sectp
;
11781 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
11783 else if (section_is_p (sectp
->name
, &names
->cu_index
))
11785 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
11786 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
11788 else if (section_is_p (sectp
->name
, &names
->tu_index
))
11790 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
11791 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
11795 /* This function is mapped across the sections and remembers the offset and
11796 size of each of the DWP version 2 debugging sections that we are interested
11797 in. This is split into a separate function because we don't know if we
11798 have version 1 or 2 until we parse the cu_index/tu_index sections. */
11801 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
11803 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11804 const struct dwop_section_names
*names
= &dwop_section_names
;
11805 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11807 /* Record the ELF section number for later lookup: this is what the
11808 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11809 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11810 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11812 /* Look for specific sections that we need. */
11813 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11815 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
11816 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
11818 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11820 dwp_file
->sections
.info
.s
.section
= sectp
;
11821 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
11823 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11825 dwp_file
->sections
.line
.s
.section
= sectp
;
11826 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
11828 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11830 dwp_file
->sections
.loc
.s
.section
= sectp
;
11831 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
11833 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11835 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
11836 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
11838 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11840 dwp_file
->sections
.macro
.s
.section
= sectp
;
11841 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
11843 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11845 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
11846 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
11848 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11850 dwp_file
->sections
.types
.s
.section
= sectp
;
11851 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
11855 /* Hash function for dwp_file loaded CUs/TUs. */
11858 hash_dwp_loaded_cutus (const void *item
)
11860 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11862 /* This drops the top 32 bits of the signature, but is ok for a hash. */
11863 return dwo_unit
->signature
;
11866 /* Equality function for dwp_file loaded CUs/TUs. */
11869 eq_dwp_loaded_cutus (const void *a
, const void *b
)
11871 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
11872 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
11874 return dua
->signature
== dub
->signature
;
11877 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
11880 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
11882 return htab_create_alloc_ex (3,
11883 hash_dwp_loaded_cutus
,
11884 eq_dwp_loaded_cutus
,
11886 &objfile
->objfile_obstack
,
11887 hashtab_obstack_allocate
,
11888 dummy_obstack_deallocate
);
11891 /* Try to open DWP file FILE_NAME.
11892 The result is the bfd handle of the file.
11893 If there is a problem finding or opening the file, return NULL.
11894 Upon success, the canonicalized path of the file is stored in the bfd,
11895 same as symfile_bfd_open. */
11897 static gdb_bfd_ref_ptr
11898 open_dwp_file (const char *file_name
)
11900 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
11901 1 /*search_cwd*/));
11905 /* Work around upstream bug 15652.
11906 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
11907 [Whether that's a "bug" is debatable, but it is getting in our way.]
11908 We have no real idea where the dwp file is, because gdb's realpath-ing
11909 of the executable's path may have discarded the needed info.
11910 [IWBN if the dwp file name was recorded in the executable, akin to
11911 .gnu_debuglink, but that doesn't exist yet.]
11912 Strip the directory from FILE_NAME and search again. */
11913 if (*debug_file_directory
!= '\0')
11915 /* Don't implicitly search the current directory here.
11916 If the user wants to search "." to handle this case,
11917 it must be added to debug-file-directory. */
11918 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
11925 /* Initialize the use of the DWP file for the current objfile.
11926 By convention the name of the DWP file is ${objfile}.dwp.
11927 The result is NULL if it can't be found. */
11929 static struct dwp_file
*
11930 open_and_init_dwp_file (void)
11932 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11933 struct dwp_file
*dwp_file
;
11935 /* Try to find first .dwp for the binary file before any symbolic links
11938 /* If the objfile is a debug file, find the name of the real binary
11939 file and get the name of dwp file from there. */
11940 std::string dwp_name
;
11941 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
11943 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
11944 const char *backlink_basename
= lbasename (backlink
->original_name
);
11946 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
11949 dwp_name
= objfile
->original_name
;
11951 dwp_name
+= ".dwp";
11953 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
.c_str ()));
11955 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
11957 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
11958 dwp_name
= objfile_name (objfile
);
11959 dwp_name
+= ".dwp";
11960 dbfd
= open_dwp_file (dwp_name
.c_str ());
11965 if (dwarf_read_debug
)
11966 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
11969 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
11970 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
11971 dwp_file
->dbfd
= dbfd
.release ();
11973 /* +1: section 0 is unused */
11974 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
11975 dwp_file
->elf_sections
=
11976 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
11977 dwp_file
->num_sections
, asection
*);
11979 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
11982 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
11984 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
11986 /* The DWP file version is stored in the hash table. Oh well. */
11987 if (dwp_file
->cus
&& dwp_file
->tus
11988 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
11990 /* Technically speaking, we should try to limp along, but this is
11991 pretty bizarre. We use pulongest here because that's the established
11992 portability solution (e.g, we cannot use %u for uint32_t). */
11993 error (_("Dwarf Error: DWP file CU version %s doesn't match"
11994 " TU version %s [in DWP file %s]"),
11995 pulongest (dwp_file
->cus
->version
),
11996 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12000 dwp_file
->version
= dwp_file
->cus
->version
;
12001 else if (dwp_file
->tus
)
12002 dwp_file
->version
= dwp_file
->tus
->version
;
12004 dwp_file
->version
= 2;
12006 if (dwp_file
->version
== 2)
12007 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
12010 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
12011 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
12013 if (dwarf_read_debug
)
12015 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12016 fprintf_unfiltered (gdb_stdlog
,
12017 " %s CUs, %s TUs\n",
12018 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12019 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12025 /* Wrapper around open_and_init_dwp_file, only open it once. */
12027 static struct dwp_file
*
12028 get_dwp_file (void)
12030 if (! dwarf2_per_objfile
->dwp_checked
)
12032 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
12033 dwarf2_per_objfile
->dwp_checked
= 1;
12035 return dwarf2_per_objfile
->dwp_file
;
12038 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12039 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12040 or in the DWP file for the objfile, referenced by THIS_UNIT.
12041 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12042 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12044 This is called, for example, when wanting to read a variable with a
12045 complex location. Therefore we don't want to do file i/o for every call.
12046 Therefore we don't want to look for a DWO file on every call.
12047 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12048 then we check if we've already seen DWO_NAME, and only THEN do we check
12051 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12052 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12054 static struct dwo_unit
*
12055 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12056 const char *dwo_name
, const char *comp_dir
,
12057 ULONGEST signature
, int is_debug_types
)
12059 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12060 const char *kind
= is_debug_types
? "TU" : "CU";
12061 void **dwo_file_slot
;
12062 struct dwo_file
*dwo_file
;
12063 struct dwp_file
*dwp_file
;
12065 /* First see if there's a DWP file.
12066 If we have a DWP file but didn't find the DWO inside it, don't
12067 look for the original DWO file. It makes gdb behave differently
12068 depending on whether one is debugging in the build tree. */
12070 dwp_file
= get_dwp_file ();
12071 if (dwp_file
!= NULL
)
12073 const struct dwp_hash_table
*dwp_htab
=
12074 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12076 if (dwp_htab
!= NULL
)
12078 struct dwo_unit
*dwo_cutu
=
12079 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
12080 signature
, is_debug_types
);
12082 if (dwo_cutu
!= NULL
)
12084 if (dwarf_read_debug
)
12086 fprintf_unfiltered (gdb_stdlog
,
12087 "Virtual DWO %s %s found: @%s\n",
12088 kind
, hex_string (signature
),
12089 host_address_to_string (dwo_cutu
));
12097 /* No DWP file, look for the DWO file. */
12099 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
12100 if (*dwo_file_slot
== NULL
)
12102 /* Read in the file and build a table of the CUs/TUs it contains. */
12103 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12105 /* NOTE: This will be NULL if unable to open the file. */
12106 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12108 if (dwo_file
!= NULL
)
12110 struct dwo_unit
*dwo_cutu
= NULL
;
12112 if (is_debug_types
&& dwo_file
->tus
)
12114 struct dwo_unit find_dwo_cutu
;
12116 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12117 find_dwo_cutu
.signature
= signature
;
12119 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
12121 else if (!is_debug_types
&& dwo_file
->cus
)
12123 struct dwo_unit find_dwo_cutu
;
12125 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12126 find_dwo_cutu
.signature
= signature
;
12127 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
12131 if (dwo_cutu
!= NULL
)
12133 if (dwarf_read_debug
)
12135 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12136 kind
, dwo_name
, hex_string (signature
),
12137 host_address_to_string (dwo_cutu
));
12144 /* We didn't find it. This could mean a dwo_id mismatch, or
12145 someone deleted the DWO/DWP file, or the search path isn't set up
12146 correctly to find the file. */
12148 if (dwarf_read_debug
)
12150 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12151 kind
, dwo_name
, hex_string (signature
));
12154 /* This is a warning and not a complaint because it can be caused by
12155 pilot error (e.g., user accidentally deleting the DWO). */
12157 /* Print the name of the DWP file if we looked there, helps the user
12158 better diagnose the problem. */
12159 std::string dwp_text
;
12161 if (dwp_file
!= NULL
)
12162 dwp_text
= string_printf (" [in DWP file %s]",
12163 lbasename (dwp_file
->name
));
12165 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
12166 " [in module %s]"),
12167 kind
, dwo_name
, hex_string (signature
),
12169 this_unit
->is_debug_types
? "TU" : "CU",
12170 to_underlying (this_unit
->sect_off
), objfile_name (objfile
));
12175 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12176 See lookup_dwo_cutu_unit for details. */
12178 static struct dwo_unit
*
12179 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12180 const char *dwo_name
, const char *comp_dir
,
12181 ULONGEST signature
)
12183 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12186 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12187 See lookup_dwo_cutu_unit for details. */
12189 static struct dwo_unit
*
12190 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12191 const char *dwo_name
, const char *comp_dir
)
12193 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12196 /* Traversal function for queue_and_load_all_dwo_tus. */
12199 queue_and_load_dwo_tu (void **slot
, void *info
)
12201 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12202 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12203 ULONGEST signature
= dwo_unit
->signature
;
12204 struct signatured_type
*sig_type
=
12205 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12207 if (sig_type
!= NULL
)
12209 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12211 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12212 a real dependency of PER_CU on SIG_TYPE. That is detected later
12213 while processing PER_CU. */
12214 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12215 load_full_type_unit (sig_cu
);
12216 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
12222 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12223 The DWO may have the only definition of the type, though it may not be
12224 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12225 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12228 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12230 struct dwo_unit
*dwo_unit
;
12231 struct dwo_file
*dwo_file
;
12233 gdb_assert (!per_cu
->is_debug_types
);
12234 gdb_assert (get_dwp_file () == NULL
);
12235 gdb_assert (per_cu
->cu
!= NULL
);
12237 dwo_unit
= per_cu
->cu
->dwo_unit
;
12238 gdb_assert (dwo_unit
!= NULL
);
12240 dwo_file
= dwo_unit
->dwo_file
;
12241 if (dwo_file
->tus
!= NULL
)
12242 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
12245 /* Free all resources associated with DWO_FILE.
12246 Close the DWO file and munmap the sections.
12247 All memory should be on the objfile obstack. */
12250 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
12253 /* Note: dbfd is NULL for virtual DWO files. */
12254 gdb_bfd_unref (dwo_file
->dbfd
);
12256 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
12259 /* Wrapper for free_dwo_file for use in cleanups. */
12262 free_dwo_file_cleanup (void *arg
)
12264 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
12265 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12267 free_dwo_file (dwo_file
, objfile
);
12270 /* Traversal function for free_dwo_files. */
12273 free_dwo_file_from_slot (void **slot
, void *info
)
12275 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
12276 struct objfile
*objfile
= (struct objfile
*) info
;
12278 free_dwo_file (dwo_file
, objfile
);
12283 /* Free all resources associated with DWO_FILES. */
12286 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
12288 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
12291 /* Read in various DIEs. */
12293 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12294 Inherit only the children of the DW_AT_abstract_origin DIE not being
12295 already referenced by DW_AT_abstract_origin from the children of the
12299 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12301 struct die_info
*child_die
;
12302 sect_offset
*offsetp
;
12303 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12304 struct die_info
*origin_die
;
12305 /* Iterator of the ORIGIN_DIE children. */
12306 struct die_info
*origin_child_die
;
12307 struct attribute
*attr
;
12308 struct dwarf2_cu
*origin_cu
;
12309 struct pending
**origin_previous_list_in_scope
;
12311 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12315 /* Note that following die references may follow to a die in a
12319 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12321 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12323 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12324 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12326 if (die
->tag
!= origin_die
->tag
12327 && !(die
->tag
== DW_TAG_inlined_subroutine
12328 && origin_die
->tag
== DW_TAG_subprogram
))
12329 complaint (&symfile_complaints
,
12330 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
12331 to_underlying (die
->sect_off
),
12332 to_underlying (origin_die
->sect_off
));
12334 std::vector
<sect_offset
> offsets
;
12336 for (child_die
= die
->child
;
12337 child_die
&& child_die
->tag
;
12338 child_die
= sibling_die (child_die
))
12340 struct die_info
*child_origin_die
;
12341 struct dwarf2_cu
*child_origin_cu
;
12343 /* We are trying to process concrete instance entries:
12344 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12345 it's not relevant to our analysis here. i.e. detecting DIEs that are
12346 present in the abstract instance but not referenced in the concrete
12348 if (child_die
->tag
== DW_TAG_call_site
12349 || child_die
->tag
== DW_TAG_GNU_call_site
)
12352 /* For each CHILD_DIE, find the corresponding child of
12353 ORIGIN_DIE. If there is more than one layer of
12354 DW_AT_abstract_origin, follow them all; there shouldn't be,
12355 but GCC versions at least through 4.4 generate this (GCC PR
12357 child_origin_die
= child_die
;
12358 child_origin_cu
= cu
;
12361 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12365 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12369 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12370 counterpart may exist. */
12371 if (child_origin_die
!= child_die
)
12373 if (child_die
->tag
!= child_origin_die
->tag
12374 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12375 && child_origin_die
->tag
== DW_TAG_subprogram
))
12376 complaint (&symfile_complaints
,
12377 _("Child DIE 0x%x and its abstract origin 0x%x have "
12379 to_underlying (child_die
->sect_off
),
12380 to_underlying (child_origin_die
->sect_off
));
12381 if (child_origin_die
->parent
!= origin_die
)
12382 complaint (&symfile_complaints
,
12383 _("Child DIE 0x%x and its abstract origin 0x%x have "
12384 "different parents"),
12385 to_underlying (child_die
->sect_off
),
12386 to_underlying (child_origin_die
->sect_off
));
12388 offsets
.push_back (child_origin_die
->sect_off
);
12391 std::sort (offsets
.begin (), offsets
.end ());
12392 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12393 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12394 if (offsetp
[-1] == *offsetp
)
12395 complaint (&symfile_complaints
,
12396 _("Multiple children of DIE 0x%x refer "
12397 "to DIE 0x%x as their abstract origin"),
12398 to_underlying (die
->sect_off
), to_underlying (*offsetp
));
12400 offsetp
= offsets
.data ();
12401 origin_child_die
= origin_die
->child
;
12402 while (origin_child_die
&& origin_child_die
->tag
)
12404 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12405 while (offsetp
< offsets_end
12406 && *offsetp
< origin_child_die
->sect_off
)
12408 if (offsetp
>= offsets_end
12409 || *offsetp
> origin_child_die
->sect_off
)
12411 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12412 Check whether we're already processing ORIGIN_CHILD_DIE.
12413 This can happen with mutually referenced abstract_origins.
12415 if (!origin_child_die
->in_process
)
12416 process_die (origin_child_die
, origin_cu
);
12418 origin_child_die
= sibling_die (origin_child_die
);
12420 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12424 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12426 struct objfile
*objfile
= cu
->objfile
;
12427 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12428 struct context_stack
*newobj
;
12431 struct die_info
*child_die
;
12432 struct attribute
*attr
, *call_line
, *call_file
;
12434 CORE_ADDR baseaddr
;
12435 struct block
*block
;
12436 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12437 std::vector
<struct symbol
*> template_args
;
12438 struct template_symbol
*templ_func
= NULL
;
12442 /* If we do not have call site information, we can't show the
12443 caller of this inlined function. That's too confusing, so
12444 only use the scope for local variables. */
12445 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12446 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12447 if (call_line
== NULL
|| call_file
== NULL
)
12449 read_lexical_block_scope (die
, cu
);
12454 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12456 name
= dwarf2_name (die
, cu
);
12458 /* Ignore functions with missing or empty names. These are actually
12459 illegal according to the DWARF standard. */
12462 complaint (&symfile_complaints
,
12463 _("missing name for subprogram DIE at %d"),
12464 to_underlying (die
->sect_off
));
12468 /* Ignore functions with missing or invalid low and high pc attributes. */
12469 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12470 <= PC_BOUNDS_INVALID
)
12472 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12473 if (!attr
|| !DW_UNSND (attr
))
12474 complaint (&symfile_complaints
,
12475 _("cannot get low and high bounds "
12476 "for subprogram DIE at %d"),
12477 to_underlying (die
->sect_off
));
12481 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12482 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12484 /* If we have any template arguments, then we must allocate a
12485 different sort of symbol. */
12486 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
12488 if (child_die
->tag
== DW_TAG_template_type_param
12489 || child_die
->tag
== DW_TAG_template_value_param
)
12491 templ_func
= allocate_template_symbol (objfile
);
12492 templ_func
->subclass
= SYMBOL_TEMPLATE
;
12497 newobj
= push_context (0, lowpc
);
12498 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
12499 (struct symbol
*) templ_func
);
12501 /* If there is a location expression for DW_AT_frame_base, record
12503 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
12505 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
12507 /* If there is a location for the static link, record it. */
12508 newobj
->static_link
= NULL
;
12509 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
12512 newobj
->static_link
12513 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
12514 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
12517 cu
->list_in_scope
= &local_symbols
;
12519 if (die
->child
!= NULL
)
12521 child_die
= die
->child
;
12522 while (child_die
&& child_die
->tag
)
12524 if (child_die
->tag
== DW_TAG_template_type_param
12525 || child_die
->tag
== DW_TAG_template_value_param
)
12527 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12530 template_args
.push_back (arg
);
12533 process_die (child_die
, cu
);
12534 child_die
= sibling_die (child_die
);
12538 inherit_abstract_dies (die
, cu
);
12540 /* If we have a DW_AT_specification, we might need to import using
12541 directives from the context of the specification DIE. See the
12542 comment in determine_prefix. */
12543 if (cu
->language
== language_cplus
12544 && dwarf2_attr (die
, DW_AT_specification
, cu
))
12546 struct dwarf2_cu
*spec_cu
= cu
;
12547 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
12551 child_die
= spec_die
->child
;
12552 while (child_die
&& child_die
->tag
)
12554 if (child_die
->tag
== DW_TAG_imported_module
)
12555 process_die (child_die
, spec_cu
);
12556 child_die
= sibling_die (child_die
);
12559 /* In some cases, GCC generates specification DIEs that
12560 themselves contain DW_AT_specification attributes. */
12561 spec_die
= die_specification (spec_die
, &spec_cu
);
12565 newobj
= pop_context ();
12566 /* Make a block for the local symbols within. */
12567 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
12568 newobj
->static_link
, lowpc
, highpc
);
12570 /* For C++, set the block's scope. */
12571 if ((cu
->language
== language_cplus
12572 || cu
->language
== language_fortran
12573 || cu
->language
== language_d
12574 || cu
->language
== language_rust
)
12575 && cu
->processing_has_namespace_info
)
12576 block_set_scope (block
, determine_prefix (die
, cu
),
12577 &objfile
->objfile_obstack
);
12579 /* If we have address ranges, record them. */
12580 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
12582 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
12584 /* Attach template arguments to function. */
12585 if (!template_args
.empty ())
12587 gdb_assert (templ_func
!= NULL
);
12589 templ_func
->n_template_arguments
= template_args
.size ();
12590 templ_func
->template_arguments
12591 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
12592 templ_func
->n_template_arguments
);
12593 memcpy (templ_func
->template_arguments
,
12594 template_args
.data (),
12595 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
12598 /* In C++, we can have functions nested inside functions (e.g., when
12599 a function declares a class that has methods). This means that
12600 when we finish processing a function scope, we may need to go
12601 back to building a containing block's symbol lists. */
12602 local_symbols
= newobj
->locals
;
12603 local_using_directives
= newobj
->local_using_directives
;
12605 /* If we've finished processing a top-level function, subsequent
12606 symbols go in the file symbol list. */
12607 if (outermost_context_p ())
12608 cu
->list_in_scope
= &file_symbols
;
12611 /* Process all the DIES contained within a lexical block scope. Start
12612 a new scope, process the dies, and then close the scope. */
12615 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12617 struct objfile
*objfile
= cu
->objfile
;
12618 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12619 struct context_stack
*newobj
;
12620 CORE_ADDR lowpc
, highpc
;
12621 struct die_info
*child_die
;
12622 CORE_ADDR baseaddr
;
12624 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12626 /* Ignore blocks with missing or invalid low and high pc attributes. */
12627 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
12628 as multiple lexical blocks? Handling children in a sane way would
12629 be nasty. Might be easier to properly extend generic blocks to
12630 describe ranges. */
12631 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
12633 case PC_BOUNDS_NOT_PRESENT
:
12634 /* DW_TAG_lexical_block has no attributes, process its children as if
12635 there was no wrapping by that DW_TAG_lexical_block.
12636 GCC does no longer produces such DWARF since GCC r224161. */
12637 for (child_die
= die
->child
;
12638 child_die
!= NULL
&& child_die
->tag
;
12639 child_die
= sibling_die (child_die
))
12640 process_die (child_die
, cu
);
12642 case PC_BOUNDS_INVALID
:
12645 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12646 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12648 push_context (0, lowpc
);
12649 if (die
->child
!= NULL
)
12651 child_die
= die
->child
;
12652 while (child_die
&& child_die
->tag
)
12654 process_die (child_die
, cu
);
12655 child_die
= sibling_die (child_die
);
12658 inherit_abstract_dies (die
, cu
);
12659 newobj
= pop_context ();
12661 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
12663 struct block
*block
12664 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
12665 newobj
->start_addr
, highpc
);
12667 /* Note that recording ranges after traversing children, as we
12668 do here, means that recording a parent's ranges entails
12669 walking across all its children's ranges as they appear in
12670 the address map, which is quadratic behavior.
12672 It would be nicer to record the parent's ranges before
12673 traversing its children, simply overriding whatever you find
12674 there. But since we don't even decide whether to create a
12675 block until after we've traversed its children, that's hard
12677 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
12679 local_symbols
= newobj
->locals
;
12680 local_using_directives
= newobj
->local_using_directives
;
12683 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
12686 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12688 struct objfile
*objfile
= cu
->objfile
;
12689 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12690 CORE_ADDR pc
, baseaddr
;
12691 struct attribute
*attr
;
12692 struct call_site
*call_site
, call_site_local
;
12695 struct die_info
*child_die
;
12697 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12699 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
12702 /* This was a pre-DWARF-5 GNU extension alias
12703 for DW_AT_call_return_pc. */
12704 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12708 complaint (&symfile_complaints
,
12709 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
12710 "DIE 0x%x [in module %s]"),
12711 to_underlying (die
->sect_off
), objfile_name (objfile
));
12714 pc
= attr_value_as_address (attr
) + baseaddr
;
12715 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
12717 if (cu
->call_site_htab
== NULL
)
12718 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
12719 NULL
, &objfile
->objfile_obstack
,
12720 hashtab_obstack_allocate
, NULL
);
12721 call_site_local
.pc
= pc
;
12722 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
12725 complaint (&symfile_complaints
,
12726 _("Duplicate PC %s for DW_TAG_call_site "
12727 "DIE 0x%x [in module %s]"),
12728 paddress (gdbarch
, pc
), to_underlying (die
->sect_off
),
12729 objfile_name (objfile
));
12733 /* Count parameters at the caller. */
12736 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
12737 child_die
= sibling_die (child_die
))
12739 if (child_die
->tag
!= DW_TAG_call_site_parameter
12740 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12742 complaint (&symfile_complaints
,
12743 _("Tag %d is not DW_TAG_call_site_parameter in "
12744 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12745 child_die
->tag
, to_underlying (child_die
->sect_off
),
12746 objfile_name (objfile
));
12754 = ((struct call_site
*)
12755 obstack_alloc (&objfile
->objfile_obstack
,
12756 sizeof (*call_site
)
12757 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
12759 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
12760 call_site
->pc
= pc
;
12762 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
12763 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
12765 struct die_info
*func_die
;
12767 /* Skip also over DW_TAG_inlined_subroutine. */
12768 for (func_die
= die
->parent
;
12769 func_die
&& func_die
->tag
!= DW_TAG_subprogram
12770 && func_die
->tag
!= DW_TAG_subroutine_type
;
12771 func_die
= func_die
->parent
);
12773 /* DW_AT_call_all_calls is a superset
12774 of DW_AT_call_all_tail_calls. */
12776 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
12777 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
12778 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
12779 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
12781 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
12782 not complete. But keep CALL_SITE for look ups via call_site_htab,
12783 both the initial caller containing the real return address PC and
12784 the final callee containing the current PC of a chain of tail
12785 calls do not need to have the tail call list complete. But any
12786 function candidate for a virtual tail call frame searched via
12787 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
12788 determined unambiguously. */
12792 struct type
*func_type
= NULL
;
12795 func_type
= get_die_type (func_die
, cu
);
12796 if (func_type
!= NULL
)
12798 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
12800 /* Enlist this call site to the function. */
12801 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
12802 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
12805 complaint (&symfile_complaints
,
12806 _("Cannot find function owning DW_TAG_call_site "
12807 "DIE 0x%x [in module %s]"),
12808 to_underlying (die
->sect_off
), objfile_name (objfile
));
12812 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
12814 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
12816 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
12819 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
12820 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12822 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
12823 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
12824 /* Keep NULL DWARF_BLOCK. */;
12825 else if (attr_form_is_block (attr
))
12827 struct dwarf2_locexpr_baton
*dlbaton
;
12829 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
12830 dlbaton
->data
= DW_BLOCK (attr
)->data
;
12831 dlbaton
->size
= DW_BLOCK (attr
)->size
;
12832 dlbaton
->per_cu
= cu
->per_cu
;
12834 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
12836 else if (attr_form_is_ref (attr
))
12838 struct dwarf2_cu
*target_cu
= cu
;
12839 struct die_info
*target_die
;
12841 target_die
= follow_die_ref (die
, attr
, &target_cu
);
12842 gdb_assert (target_cu
->objfile
== objfile
);
12843 if (die_is_declaration (target_die
, target_cu
))
12845 const char *target_physname
;
12847 /* Prefer the mangled name; otherwise compute the demangled one. */
12848 target_physname
= dw2_linkage_name (target_die
, target_cu
);
12849 if (target_physname
== NULL
)
12850 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
12851 if (target_physname
== NULL
)
12852 complaint (&symfile_complaints
,
12853 _("DW_AT_call_target target DIE has invalid "
12854 "physname, for referencing DIE 0x%x [in module %s]"),
12855 to_underlying (die
->sect_off
), objfile_name (objfile
));
12857 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
12863 /* DW_AT_entry_pc should be preferred. */
12864 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
12865 <= PC_BOUNDS_INVALID
)
12866 complaint (&symfile_complaints
,
12867 _("DW_AT_call_target target DIE has invalid "
12868 "low pc, for referencing DIE 0x%x [in module %s]"),
12869 to_underlying (die
->sect_off
), objfile_name (objfile
));
12872 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12873 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
12878 complaint (&symfile_complaints
,
12879 _("DW_TAG_call_site DW_AT_call_target is neither "
12880 "block nor reference, for DIE 0x%x [in module %s]"),
12881 to_underlying (die
->sect_off
), objfile_name (objfile
));
12883 call_site
->per_cu
= cu
->per_cu
;
12885 for (child_die
= die
->child
;
12886 child_die
&& child_die
->tag
;
12887 child_die
= sibling_die (child_die
))
12889 struct call_site_parameter
*parameter
;
12890 struct attribute
*loc
, *origin
;
12892 if (child_die
->tag
!= DW_TAG_call_site_parameter
12893 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12895 /* Already printed the complaint above. */
12899 gdb_assert (call_site
->parameter_count
< nparams
);
12900 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
12902 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
12903 specifies DW_TAG_formal_parameter. Value of the data assumed for the
12904 register is contained in DW_AT_call_value. */
12906 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
12907 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
12908 if (origin
== NULL
)
12910 /* This was a pre-DWARF-5 GNU extension alias
12911 for DW_AT_call_parameter. */
12912 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
12914 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
12916 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
12918 sect_offset sect_off
12919 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
12920 if (!offset_in_cu_p (&cu
->header
, sect_off
))
12922 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
12923 binding can be done only inside one CU. Such referenced DIE
12924 therefore cannot be even moved to DW_TAG_partial_unit. */
12925 complaint (&symfile_complaints
,
12926 _("DW_AT_call_parameter offset is not in CU for "
12927 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12928 to_underlying (child_die
->sect_off
),
12929 objfile_name (objfile
));
12932 parameter
->u
.param_cu_off
12933 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
12935 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
12937 complaint (&symfile_complaints
,
12938 _("No DW_FORM_block* DW_AT_location for "
12939 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12940 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
12945 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
12946 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
12947 if (parameter
->u
.dwarf_reg
!= -1)
12948 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
12949 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
12950 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
12951 ¶meter
->u
.fb_offset
))
12952 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
12955 complaint (&symfile_complaints
,
12956 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
12957 "for DW_FORM_block* DW_AT_location is supported for "
12958 "DW_TAG_call_site child DIE 0x%x "
12960 to_underlying (child_die
->sect_off
),
12961 objfile_name (objfile
));
12966 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
12968 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
12969 if (!attr_form_is_block (attr
))
12971 complaint (&symfile_complaints
,
12972 _("No DW_FORM_block* DW_AT_call_value for "
12973 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12974 to_underlying (child_die
->sect_off
),
12975 objfile_name (objfile
));
12978 parameter
->value
= DW_BLOCK (attr
)->data
;
12979 parameter
->value_size
= DW_BLOCK (attr
)->size
;
12981 /* Parameters are not pre-cleared by memset above. */
12982 parameter
->data_value
= NULL
;
12983 parameter
->data_value_size
= 0;
12984 call_site
->parameter_count
++;
12986 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
12988 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
12991 if (!attr_form_is_block (attr
))
12992 complaint (&symfile_complaints
,
12993 _("No DW_FORM_block* DW_AT_call_data_value for "
12994 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12995 to_underlying (child_die
->sect_off
),
12996 objfile_name (objfile
));
12999 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13000 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13006 /* Helper function for read_variable. If DIE represents a virtual
13007 table, then return the type of the concrete object that is
13008 associated with the virtual table. Otherwise, return NULL. */
13010 static struct type
*
13011 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13013 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13017 /* Find the type DIE. */
13018 struct die_info
*type_die
= NULL
;
13019 struct dwarf2_cu
*type_cu
= cu
;
13021 if (attr_form_is_ref (attr
))
13022 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13023 if (type_die
== NULL
)
13026 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13028 return die_containing_type (type_die
, type_cu
);
13031 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13034 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13036 struct rust_vtable_symbol
*storage
= NULL
;
13038 if (cu
->language
== language_rust
)
13040 struct type
*containing_type
= rust_containing_type (die
, cu
);
13042 if (containing_type
!= NULL
)
13044 struct objfile
*objfile
= cu
->objfile
;
13046 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
13047 struct rust_vtable_symbol
);
13048 initialize_objfile_symbol (storage
);
13049 storage
->concrete_type
= containing_type
;
13050 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13054 new_symbol_full (die
, NULL
, cu
, storage
);
13057 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13058 reading .debug_rnglists.
13059 Callback's type should be:
13060 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13061 Return true if the attributes are present and valid, otherwise,
13064 template <typename Callback
>
13066 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13067 Callback
&&callback
)
13069 struct objfile
*objfile
= cu
->objfile
;
13070 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13071 struct comp_unit_head
*cu_header
= &cu
->header
;
13072 bfd
*obfd
= objfile
->obfd
;
13073 unsigned int addr_size
= cu_header
->addr_size
;
13074 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13075 /* Base address selection entry. */
13078 unsigned int dummy
;
13079 const gdb_byte
*buffer
;
13081 CORE_ADDR high
= 0;
13082 CORE_ADDR baseaddr
;
13083 bool overflow
= false;
13085 found_base
= cu
->base_known
;
13086 base
= cu
->base_address
;
13088 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
13089 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13091 complaint (&symfile_complaints
,
13092 _("Offset %d out of bounds for DW_AT_ranges attribute"),
13096 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13098 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13102 /* Initialize it due to a false compiler warning. */
13103 CORE_ADDR range_beginning
= 0, range_end
= 0;
13104 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13105 + dwarf2_per_objfile
->rnglists
.size
);
13106 unsigned int bytes_read
;
13108 if (buffer
== buf_end
)
13113 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13116 case DW_RLE_end_of_list
:
13118 case DW_RLE_base_address
:
13119 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13124 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13126 buffer
+= bytes_read
;
13128 case DW_RLE_start_length
:
13129 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13134 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13135 buffer
+= bytes_read
;
13136 range_end
= (range_beginning
13137 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13138 buffer
+= bytes_read
;
13139 if (buffer
> buf_end
)
13145 case DW_RLE_offset_pair
:
13146 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13147 buffer
+= bytes_read
;
13148 if (buffer
> buf_end
)
13153 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13154 buffer
+= bytes_read
;
13155 if (buffer
> buf_end
)
13161 case DW_RLE_start_end
:
13162 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13167 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13168 buffer
+= bytes_read
;
13169 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13170 buffer
+= bytes_read
;
13173 complaint (&symfile_complaints
,
13174 _("Invalid .debug_rnglists data (no base address)"));
13177 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13179 if (rlet
== DW_RLE_base_address
)
13184 /* We have no valid base address for the ranges
13186 complaint (&symfile_complaints
,
13187 _("Invalid .debug_rnglists data (no base address)"));
13191 if (range_beginning
> range_end
)
13193 /* Inverted range entries are invalid. */
13194 complaint (&symfile_complaints
,
13195 _("Invalid .debug_rnglists data (inverted range)"));
13199 /* Empty range entries have no effect. */
13200 if (range_beginning
== range_end
)
13203 range_beginning
+= base
;
13206 /* A not-uncommon case of bad debug info.
13207 Don't pollute the addrmap with bad data. */
13208 if (range_beginning
+ baseaddr
== 0
13209 && !dwarf2_per_objfile
->has_section_at_zero
)
13211 complaint (&symfile_complaints
,
13212 _(".debug_rnglists entry has start address of zero"
13213 " [in module %s]"), objfile_name (objfile
));
13217 callback (range_beginning
, range_end
);
13222 complaint (&symfile_complaints
,
13223 _("Offset %d is not terminated "
13224 "for DW_AT_ranges attribute"),
13232 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13233 Callback's type should be:
13234 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13235 Return 1 if the attributes are present and valid, otherwise, return 0. */
13237 template <typename Callback
>
13239 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13240 Callback
&&callback
)
13242 struct objfile
*objfile
= cu
->objfile
;
13243 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13244 struct comp_unit_head
*cu_header
= &cu
->header
;
13245 bfd
*obfd
= objfile
->obfd
;
13246 unsigned int addr_size
= cu_header
->addr_size
;
13247 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13248 /* Base address selection entry. */
13251 unsigned int dummy
;
13252 const gdb_byte
*buffer
;
13253 CORE_ADDR baseaddr
;
13255 if (cu_header
->version
>= 5)
13256 return dwarf2_rnglists_process (offset
, cu
, callback
);
13258 found_base
= cu
->base_known
;
13259 base
= cu
->base_address
;
13261 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
13262 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13264 complaint (&symfile_complaints
,
13265 _("Offset %d out of bounds for DW_AT_ranges attribute"),
13269 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13271 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13275 CORE_ADDR range_beginning
, range_end
;
13277 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
13278 buffer
+= addr_size
;
13279 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
13280 buffer
+= addr_size
;
13281 offset
+= 2 * addr_size
;
13283 /* An end of list marker is a pair of zero addresses. */
13284 if (range_beginning
== 0 && range_end
== 0)
13285 /* Found the end of list entry. */
13288 /* Each base address selection entry is a pair of 2 values.
13289 The first is the largest possible address, the second is
13290 the base address. Check for a base address here. */
13291 if ((range_beginning
& mask
) == mask
)
13293 /* If we found the largest possible address, then we already
13294 have the base address in range_end. */
13302 /* We have no valid base address for the ranges
13304 complaint (&symfile_complaints
,
13305 _("Invalid .debug_ranges data (no base address)"));
13309 if (range_beginning
> range_end
)
13311 /* Inverted range entries are invalid. */
13312 complaint (&symfile_complaints
,
13313 _("Invalid .debug_ranges data (inverted range)"));
13317 /* Empty range entries have no effect. */
13318 if (range_beginning
== range_end
)
13321 range_beginning
+= base
;
13324 /* A not-uncommon case of bad debug info.
13325 Don't pollute the addrmap with bad data. */
13326 if (range_beginning
+ baseaddr
== 0
13327 && !dwarf2_per_objfile
->has_section_at_zero
)
13329 complaint (&symfile_complaints
,
13330 _(".debug_ranges entry has start address of zero"
13331 " [in module %s]"), objfile_name (objfile
));
13335 callback (range_beginning
, range_end
);
13341 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13342 Return 1 if the attributes are present and valid, otherwise, return 0.
13343 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13346 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13347 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13348 struct partial_symtab
*ranges_pst
)
13350 struct objfile
*objfile
= cu
->objfile
;
13351 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13352 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
13353 SECT_OFF_TEXT (objfile
));
13356 CORE_ADDR high
= 0;
13359 retval
= dwarf2_ranges_process (offset
, cu
,
13360 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13362 if (ranges_pst
!= NULL
)
13367 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
13368 range_beginning
+ baseaddr
);
13369 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
13370 range_end
+ baseaddr
);
13371 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
13375 /* FIXME: This is recording everything as a low-high
13376 segment of consecutive addresses. We should have a
13377 data structure for discontiguous block ranges
13381 low
= range_beginning
;
13387 if (range_beginning
< low
)
13388 low
= range_beginning
;
13389 if (range_end
> high
)
13397 /* If the first entry is an end-of-list marker, the range
13398 describes an empty scope, i.e. no instructions. */
13404 *high_return
= high
;
13408 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13409 definition for the return value. *LOWPC and *HIGHPC are set iff
13410 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13412 static enum pc_bounds_kind
13413 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13414 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13415 struct partial_symtab
*pst
)
13417 struct attribute
*attr
;
13418 struct attribute
*attr_high
;
13420 CORE_ADDR high
= 0;
13421 enum pc_bounds_kind ret
;
13423 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13426 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13429 low
= attr_value_as_address (attr
);
13430 high
= attr_value_as_address (attr_high
);
13431 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
13435 /* Found high w/o low attribute. */
13436 return PC_BOUNDS_INVALID
;
13438 /* Found consecutive range of addresses. */
13439 ret
= PC_BOUNDS_HIGH_LOW
;
13443 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13446 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
13447 We take advantage of the fact that DW_AT_ranges does not appear
13448 in DW_TAG_compile_unit of DWO files. */
13449 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13450 unsigned int ranges_offset
= (DW_UNSND (attr
)
13451 + (need_ranges_base
13455 /* Value of the DW_AT_ranges attribute is the offset in the
13456 .debug_ranges section. */
13457 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13458 return PC_BOUNDS_INVALID
;
13459 /* Found discontinuous range of addresses. */
13460 ret
= PC_BOUNDS_RANGES
;
13463 return PC_BOUNDS_NOT_PRESENT
;
13466 /* read_partial_die has also the strict LOW < HIGH requirement. */
13468 return PC_BOUNDS_INVALID
;
13470 /* When using the GNU linker, .gnu.linkonce. sections are used to
13471 eliminate duplicate copies of functions and vtables and such.
13472 The linker will arbitrarily choose one and discard the others.
13473 The AT_*_pc values for such functions refer to local labels in
13474 these sections. If the section from that file was discarded, the
13475 labels are not in the output, so the relocs get a value of 0.
13476 If this is a discarded function, mark the pc bounds as invalid,
13477 so that GDB will ignore it. */
13478 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13479 return PC_BOUNDS_INVALID
;
13487 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13488 its low and high PC addresses. Do nothing if these addresses could not
13489 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13490 and HIGHPC to the high address if greater than HIGHPC. */
13493 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13494 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13495 struct dwarf2_cu
*cu
)
13497 CORE_ADDR low
, high
;
13498 struct die_info
*child
= die
->child
;
13500 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
13502 *lowpc
= std::min (*lowpc
, low
);
13503 *highpc
= std::max (*highpc
, high
);
13506 /* If the language does not allow nested subprograms (either inside
13507 subprograms or lexical blocks), we're done. */
13508 if (cu
->language
!= language_ada
)
13511 /* Check all the children of the given DIE. If it contains nested
13512 subprograms, then check their pc bounds. Likewise, we need to
13513 check lexical blocks as well, as they may also contain subprogram
13515 while (child
&& child
->tag
)
13517 if (child
->tag
== DW_TAG_subprogram
13518 || child
->tag
== DW_TAG_lexical_block
)
13519 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
13520 child
= sibling_die (child
);
13524 /* Get the low and high pc's represented by the scope DIE, and store
13525 them in *LOWPC and *HIGHPC. If the correct values can't be
13526 determined, set *LOWPC to -1 and *HIGHPC to 0. */
13529 get_scope_pc_bounds (struct die_info
*die
,
13530 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13531 struct dwarf2_cu
*cu
)
13533 CORE_ADDR best_low
= (CORE_ADDR
) -1;
13534 CORE_ADDR best_high
= (CORE_ADDR
) 0;
13535 CORE_ADDR current_low
, current_high
;
13537 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
13538 >= PC_BOUNDS_RANGES
)
13540 best_low
= current_low
;
13541 best_high
= current_high
;
13545 struct die_info
*child
= die
->child
;
13547 while (child
&& child
->tag
)
13549 switch (child
->tag
) {
13550 case DW_TAG_subprogram
:
13551 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
13553 case DW_TAG_namespace
:
13554 case DW_TAG_module
:
13555 /* FIXME: carlton/2004-01-16: Should we do this for
13556 DW_TAG_class_type/DW_TAG_structure_type, too? I think
13557 that current GCC's always emit the DIEs corresponding
13558 to definitions of methods of classes as children of a
13559 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
13560 the DIEs giving the declarations, which could be
13561 anywhere). But I don't see any reason why the
13562 standards says that they have to be there. */
13563 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
13565 if (current_low
!= ((CORE_ADDR
) -1))
13567 best_low
= std::min (best_low
, current_low
);
13568 best_high
= std::max (best_high
, current_high
);
13576 child
= sibling_die (child
);
13581 *highpc
= best_high
;
13584 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
13588 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
13589 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
13591 struct objfile
*objfile
= cu
->objfile
;
13592 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13593 struct attribute
*attr
;
13594 struct attribute
*attr_high
;
13596 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13599 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13602 CORE_ADDR low
= attr_value_as_address (attr
);
13603 CORE_ADDR high
= attr_value_as_address (attr_high
);
13605 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
13608 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
13609 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
13610 record_block_range (block
, low
, high
- 1);
13614 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13617 bfd
*obfd
= objfile
->obfd
;
13618 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
13619 We take advantage of the fact that DW_AT_ranges does not appear
13620 in DW_TAG_compile_unit of DWO files. */
13621 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13623 /* The value of the DW_AT_ranges attribute is the offset of the
13624 address range list in the .debug_ranges section. */
13625 unsigned long offset
= (DW_UNSND (attr
)
13626 + (need_ranges_base
? cu
->ranges_base
: 0));
13627 const gdb_byte
*buffer
;
13629 /* For some target architectures, but not others, the
13630 read_address function sign-extends the addresses it returns.
13631 To recognize base address selection entries, we need a
13633 unsigned int addr_size
= cu
->header
.addr_size
;
13634 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13636 /* The base address, to which the next pair is relative. Note
13637 that this 'base' is a DWARF concept: most entries in a range
13638 list are relative, to reduce the number of relocs against the
13639 debugging information. This is separate from this function's
13640 'baseaddr' argument, which GDB uses to relocate debugging
13641 information from a shared library based on the address at
13642 which the library was loaded. */
13643 CORE_ADDR base
= cu
->base_address
;
13644 int base_known
= cu
->base_known
;
13646 dwarf2_ranges_process (offset
, cu
,
13647 [&] (CORE_ADDR start
, CORE_ADDR end
)
13651 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
13652 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
13653 record_block_range (block
, start
, end
- 1);
13658 /* Check whether the producer field indicates either of GCC < 4.6, or the
13659 Intel C/C++ compiler, and cache the result in CU. */
13662 check_producer (struct dwarf2_cu
*cu
)
13666 if (cu
->producer
== NULL
)
13668 /* For unknown compilers expect their behavior is DWARF version
13671 GCC started to support .debug_types sections by -gdwarf-4 since
13672 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
13673 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
13674 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
13675 interpreted incorrectly by GDB now - GCC PR debug/48229. */
13677 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
13679 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
13680 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
13682 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
13683 cu
->producer_is_icc_lt_14
= major
< 14;
13686 /* For other non-GCC compilers, expect their behavior is DWARF version
13690 cu
->checked_producer
= 1;
13693 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
13694 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
13695 during 4.6.0 experimental. */
13698 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
13700 if (!cu
->checked_producer
)
13701 check_producer (cu
);
13703 return cu
->producer_is_gxx_lt_4_6
;
13706 /* Return the default accessibility type if it is not overriden by
13707 DW_AT_accessibility. */
13709 static enum dwarf_access_attribute
13710 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
13712 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
13714 /* The default DWARF 2 accessibility for members is public, the default
13715 accessibility for inheritance is private. */
13717 if (die
->tag
!= DW_TAG_inheritance
)
13718 return DW_ACCESS_public
;
13720 return DW_ACCESS_private
;
13724 /* DWARF 3+ defines the default accessibility a different way. The same
13725 rules apply now for DW_TAG_inheritance as for the members and it only
13726 depends on the container kind. */
13728 if (die
->parent
->tag
== DW_TAG_class_type
)
13729 return DW_ACCESS_private
;
13731 return DW_ACCESS_public
;
13735 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
13736 offset. If the attribute was not found return 0, otherwise return
13737 1. If it was found but could not properly be handled, set *OFFSET
13741 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
13744 struct attribute
*attr
;
13746 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
13751 /* Note that we do not check for a section offset first here.
13752 This is because DW_AT_data_member_location is new in DWARF 4,
13753 so if we see it, we can assume that a constant form is really
13754 a constant and not a section offset. */
13755 if (attr_form_is_constant (attr
))
13756 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
13757 else if (attr_form_is_section_offset (attr
))
13758 dwarf2_complex_location_expr_complaint ();
13759 else if (attr_form_is_block (attr
))
13760 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
13762 dwarf2_complex_location_expr_complaint ();
13770 /* Add an aggregate field to the field list. */
13773 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
13774 struct dwarf2_cu
*cu
)
13776 struct objfile
*objfile
= cu
->objfile
;
13777 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13778 struct nextfield
*new_field
;
13779 struct attribute
*attr
;
13781 const char *fieldname
= "";
13783 /* Allocate a new field list entry and link it in. */
13784 new_field
= XNEW (struct nextfield
);
13785 make_cleanup (xfree
, new_field
);
13786 memset (new_field
, 0, sizeof (struct nextfield
));
13788 if (die
->tag
== DW_TAG_inheritance
)
13790 new_field
->next
= fip
->baseclasses
;
13791 fip
->baseclasses
= new_field
;
13795 new_field
->next
= fip
->fields
;
13796 fip
->fields
= new_field
;
13800 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13802 new_field
->accessibility
= DW_UNSND (attr
);
13804 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
13805 if (new_field
->accessibility
!= DW_ACCESS_public
)
13806 fip
->non_public_fields
= 1;
13808 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13810 new_field
->virtuality
= DW_UNSND (attr
);
13812 new_field
->virtuality
= DW_VIRTUALITY_none
;
13814 fp
= &new_field
->field
;
13816 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
13820 /* Data member other than a C++ static data member. */
13822 /* Get type of field. */
13823 fp
->type
= die_type (die
, cu
);
13825 SET_FIELD_BITPOS (*fp
, 0);
13827 /* Get bit size of field (zero if none). */
13828 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
13831 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
13835 FIELD_BITSIZE (*fp
) = 0;
13838 /* Get bit offset of field. */
13839 if (handle_data_member_location (die
, cu
, &offset
))
13840 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13841 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
13844 if (gdbarch_bits_big_endian (gdbarch
))
13846 /* For big endian bits, the DW_AT_bit_offset gives the
13847 additional bit offset from the MSB of the containing
13848 anonymous object to the MSB of the field. We don't
13849 have to do anything special since we don't need to
13850 know the size of the anonymous object. */
13851 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
13855 /* For little endian bits, compute the bit offset to the
13856 MSB of the anonymous object, subtract off the number of
13857 bits from the MSB of the field to the MSB of the
13858 object, and then subtract off the number of bits of
13859 the field itself. The result is the bit offset of
13860 the LSB of the field. */
13861 int anonymous_size
;
13862 int bit_offset
= DW_UNSND (attr
);
13864 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13867 /* The size of the anonymous object containing
13868 the bit field is explicit, so use the
13869 indicated size (in bytes). */
13870 anonymous_size
= DW_UNSND (attr
);
13874 /* The size of the anonymous object containing
13875 the bit field must be inferred from the type
13876 attribute of the data member containing the
13878 anonymous_size
= TYPE_LENGTH (fp
->type
);
13880 SET_FIELD_BITPOS (*fp
,
13881 (FIELD_BITPOS (*fp
)
13882 + anonymous_size
* bits_per_byte
13883 - bit_offset
- FIELD_BITSIZE (*fp
)));
13886 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
13888 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
13889 + dwarf2_get_attr_constant_value (attr
, 0)));
13891 /* Get name of field. */
13892 fieldname
= dwarf2_name (die
, cu
);
13893 if (fieldname
== NULL
)
13896 /* The name is already allocated along with this objfile, so we don't
13897 need to duplicate it for the type. */
13898 fp
->name
= fieldname
;
13900 /* Change accessibility for artificial fields (e.g. virtual table
13901 pointer or virtual base class pointer) to private. */
13902 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
13904 FIELD_ARTIFICIAL (*fp
) = 1;
13905 new_field
->accessibility
= DW_ACCESS_private
;
13906 fip
->non_public_fields
= 1;
13909 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
13911 /* C++ static member. */
13913 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
13914 is a declaration, but all versions of G++ as of this writing
13915 (so through at least 3.2.1) incorrectly generate
13916 DW_TAG_variable tags. */
13918 const char *physname
;
13920 /* Get name of field. */
13921 fieldname
= dwarf2_name (die
, cu
);
13922 if (fieldname
== NULL
)
13925 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13927 /* Only create a symbol if this is an external value.
13928 new_symbol checks this and puts the value in the global symbol
13929 table, which we want. If it is not external, new_symbol
13930 will try to put the value in cu->list_in_scope which is wrong. */
13931 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
13933 /* A static const member, not much different than an enum as far as
13934 we're concerned, except that we can support more types. */
13935 new_symbol (die
, NULL
, cu
);
13938 /* Get physical name. */
13939 physname
= dwarf2_physname (fieldname
, die
, cu
);
13941 /* The name is already allocated along with this objfile, so we don't
13942 need to duplicate it for the type. */
13943 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
13944 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13945 FIELD_NAME (*fp
) = fieldname
;
13947 else if (die
->tag
== DW_TAG_inheritance
)
13951 /* C++ base class field. */
13952 if (handle_data_member_location (die
, cu
, &offset
))
13953 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13954 FIELD_BITSIZE (*fp
) = 0;
13955 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13956 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
13957 fip
->nbaseclasses
++;
13961 /* Add a typedef defined in the scope of the FIP's class. */
13964 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
13965 struct dwarf2_cu
*cu
)
13967 struct typedef_field_list
*new_field
;
13968 struct typedef_field
*fp
;
13970 /* Allocate a new field list entry and link it in. */
13971 new_field
= XCNEW (struct typedef_field_list
);
13972 make_cleanup (xfree
, new_field
);
13974 gdb_assert (die
->tag
== DW_TAG_typedef
);
13976 fp
= &new_field
->field
;
13978 /* Get name of field. */
13979 fp
->name
= dwarf2_name (die
, cu
);
13980 if (fp
->name
== NULL
)
13983 fp
->type
= read_type_die (die
, cu
);
13985 /* Save accessibility. */
13986 enum dwarf_access_attribute accessibility
;
13987 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13989 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13991 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13992 switch (accessibility
)
13994 case DW_ACCESS_public
:
13995 /* The assumed value if neither private nor protected. */
13997 case DW_ACCESS_private
:
13998 fp
->is_private
= 1;
14000 case DW_ACCESS_protected
:
14001 fp
->is_protected
= 1;
14004 complaint (&symfile_complaints
,
14005 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14008 new_field
->next
= fip
->typedef_field_list
;
14009 fip
->typedef_field_list
= new_field
;
14010 fip
->typedef_field_list_count
++;
14013 /* Create the vector of fields, and attach it to the type. */
14016 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14017 struct dwarf2_cu
*cu
)
14019 int nfields
= fip
->nfields
;
14021 /* Record the field count, allocate space for the array of fields,
14022 and create blank accessibility bitfields if necessary. */
14023 TYPE_NFIELDS (type
) = nfields
;
14024 TYPE_FIELDS (type
) = (struct field
*)
14025 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
14026 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
14028 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14030 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14032 TYPE_FIELD_PRIVATE_BITS (type
) =
14033 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14034 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14036 TYPE_FIELD_PROTECTED_BITS (type
) =
14037 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14038 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14040 TYPE_FIELD_IGNORE_BITS (type
) =
14041 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14042 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14045 /* If the type has baseclasses, allocate and clear a bit vector for
14046 TYPE_FIELD_VIRTUAL_BITS. */
14047 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
14049 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
14050 unsigned char *pointer
;
14052 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14053 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14054 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14055 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
14056 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
14059 /* Copy the saved-up fields into the field vector. Start from the head of
14060 the list, adding to the tail of the field array, so that they end up in
14061 the same order in the array in which they were added to the list. */
14062 while (nfields
-- > 0)
14064 struct nextfield
*fieldp
;
14068 fieldp
= fip
->fields
;
14069 fip
->fields
= fieldp
->next
;
14073 fieldp
= fip
->baseclasses
;
14074 fip
->baseclasses
= fieldp
->next
;
14077 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
14078 switch (fieldp
->accessibility
)
14080 case DW_ACCESS_private
:
14081 if (cu
->language
!= language_ada
)
14082 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
14085 case DW_ACCESS_protected
:
14086 if (cu
->language
!= language_ada
)
14087 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
14090 case DW_ACCESS_public
:
14094 /* Unknown accessibility. Complain and treat it as public. */
14096 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
14097 fieldp
->accessibility
);
14101 if (nfields
< fip
->nbaseclasses
)
14103 switch (fieldp
->virtuality
)
14105 case DW_VIRTUALITY_virtual
:
14106 case DW_VIRTUALITY_pure_virtual
:
14107 if (cu
->language
== language_ada
)
14108 error (_("unexpected virtuality in component of Ada type"));
14109 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
14116 /* Return true if this member function is a constructor, false
14120 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14122 const char *fieldname
;
14123 const char *type_name
;
14126 if (die
->parent
== NULL
)
14129 if (die
->parent
->tag
!= DW_TAG_structure_type
14130 && die
->parent
->tag
!= DW_TAG_union_type
14131 && die
->parent
->tag
!= DW_TAG_class_type
)
14134 fieldname
= dwarf2_name (die
, cu
);
14135 type_name
= dwarf2_name (die
->parent
, cu
);
14136 if (fieldname
== NULL
|| type_name
== NULL
)
14139 len
= strlen (fieldname
);
14140 return (strncmp (fieldname
, type_name
, len
) == 0
14141 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14144 /* Add a member function to the proper fieldlist. */
14147 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14148 struct type
*type
, struct dwarf2_cu
*cu
)
14150 struct objfile
*objfile
= cu
->objfile
;
14151 struct attribute
*attr
;
14152 struct fnfieldlist
*flp
;
14154 struct fn_field
*fnp
;
14155 const char *fieldname
;
14156 struct nextfnfield
*new_fnfield
;
14157 struct type
*this_type
;
14158 enum dwarf_access_attribute accessibility
;
14160 if (cu
->language
== language_ada
)
14161 error (_("unexpected member function in Ada type"));
14163 /* Get name of member function. */
14164 fieldname
= dwarf2_name (die
, cu
);
14165 if (fieldname
== NULL
)
14168 /* Look up member function name in fieldlist. */
14169 for (i
= 0; i
< fip
->nfnfields
; i
++)
14171 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14175 /* Create new list element if necessary. */
14176 if (i
< fip
->nfnfields
)
14177 flp
= &fip
->fnfieldlists
[i
];
14180 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14182 fip
->fnfieldlists
= (struct fnfieldlist
*)
14183 xrealloc (fip
->fnfieldlists
,
14184 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
14185 * sizeof (struct fnfieldlist
));
14186 if (fip
->nfnfields
== 0)
14187 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
14189 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
14190 flp
->name
= fieldname
;
14193 i
= fip
->nfnfields
++;
14196 /* Create a new member function field and chain it to the field list
14198 new_fnfield
= XNEW (struct nextfnfield
);
14199 make_cleanup (xfree
, new_fnfield
);
14200 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
14201 new_fnfield
->next
= flp
->head
;
14202 flp
->head
= new_fnfield
;
14205 /* Fill in the member function field info. */
14206 fnp
= &new_fnfield
->fnfield
;
14208 /* Delay processing of the physname until later. */
14209 if (cu
->language
== language_cplus
)
14211 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
14216 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14217 fnp
->physname
= physname
? physname
: "";
14220 fnp
->type
= alloc_type (objfile
);
14221 this_type
= read_type_die (die
, cu
);
14222 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14224 int nparams
= TYPE_NFIELDS (this_type
);
14226 /* TYPE is the domain of this method, and THIS_TYPE is the type
14227 of the method itself (TYPE_CODE_METHOD). */
14228 smash_to_method_type (fnp
->type
, type
,
14229 TYPE_TARGET_TYPE (this_type
),
14230 TYPE_FIELDS (this_type
),
14231 TYPE_NFIELDS (this_type
),
14232 TYPE_VARARGS (this_type
));
14234 /* Handle static member functions.
14235 Dwarf2 has no clean way to discern C++ static and non-static
14236 member functions. G++ helps GDB by marking the first
14237 parameter for non-static member functions (which is the this
14238 pointer) as artificial. We obtain this information from
14239 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14240 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14241 fnp
->voffset
= VOFFSET_STATIC
;
14244 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
14245 dwarf2_full_name (fieldname
, die
, cu
));
14247 /* Get fcontext from DW_AT_containing_type if present. */
14248 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14249 fnp
->fcontext
= die_containing_type (die
, cu
);
14251 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14252 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14254 /* Get accessibility. */
14255 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14257 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14259 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14260 switch (accessibility
)
14262 case DW_ACCESS_private
:
14263 fnp
->is_private
= 1;
14265 case DW_ACCESS_protected
:
14266 fnp
->is_protected
= 1;
14270 /* Check for artificial methods. */
14271 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
14272 if (attr
&& DW_UNSND (attr
) != 0)
14273 fnp
->is_artificial
= 1;
14275 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
14277 /* Get index in virtual function table if it is a virtual member
14278 function. For older versions of GCC, this is an offset in the
14279 appropriate virtual table, as specified by DW_AT_containing_type.
14280 For everyone else, it is an expression to be evaluated relative
14281 to the object address. */
14283 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14286 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
14288 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14290 /* Old-style GCC. */
14291 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14293 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14294 || (DW_BLOCK (attr
)->size
> 1
14295 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14296 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14298 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14299 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
14300 dwarf2_complex_location_expr_complaint ();
14302 fnp
->voffset
/= cu
->header
.addr_size
;
14306 dwarf2_complex_location_expr_complaint ();
14308 if (!fnp
->fcontext
)
14310 /* If there is no `this' field and no DW_AT_containing_type,
14311 we cannot actually find a base class context for the
14313 if (TYPE_NFIELDS (this_type
) == 0
14314 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
14316 complaint (&symfile_complaints
,
14317 _("cannot determine context for virtual member "
14318 "function \"%s\" (offset %d)"),
14319 fieldname
, to_underlying (die
->sect_off
));
14324 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
14328 else if (attr_form_is_section_offset (attr
))
14330 dwarf2_complex_location_expr_complaint ();
14334 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
14340 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14341 if (attr
&& DW_UNSND (attr
))
14343 /* GCC does this, as of 2008-08-25; PR debug/37237. */
14344 complaint (&symfile_complaints
,
14345 _("Member function \"%s\" (offset %d) is virtual "
14346 "but the vtable offset is not specified"),
14347 fieldname
, to_underlying (die
->sect_off
));
14348 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14349 TYPE_CPLUS_DYNAMIC (type
) = 1;
14354 /* Create the vector of member function fields, and attach it to the type. */
14357 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
14358 struct dwarf2_cu
*cu
)
14360 struct fnfieldlist
*flp
;
14363 if (cu
->language
== language_ada
)
14364 error (_("unexpected member functions in Ada type"));
14366 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14367 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
14368 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
14370 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
14372 struct nextfnfield
*nfp
= flp
->head
;
14373 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
14376 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
14377 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
14378 fn_flp
->fn_fields
= (struct fn_field
*)
14379 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
14380 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
14381 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
14384 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
14387 /* Returns non-zero if NAME is the name of a vtable member in CU's
14388 language, zero otherwise. */
14390 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
14392 static const char vptr
[] = "_vptr";
14393 static const char vtable
[] = "vtable";
14395 /* Look for the C++ form of the vtable. */
14396 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
14402 /* GCC outputs unnamed structures that are really pointers to member
14403 functions, with the ABI-specified layout. If TYPE describes
14404 such a structure, smash it into a member function type.
14406 GCC shouldn't do this; it should just output pointer to member DIEs.
14407 This is GCC PR debug/28767. */
14410 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
14412 struct type
*pfn_type
, *self_type
, *new_type
;
14414 /* Check for a structure with no name and two children. */
14415 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
14418 /* Check for __pfn and __delta members. */
14419 if (TYPE_FIELD_NAME (type
, 0) == NULL
14420 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
14421 || TYPE_FIELD_NAME (type
, 1) == NULL
14422 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
14425 /* Find the type of the method. */
14426 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
14427 if (pfn_type
== NULL
14428 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
14429 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
14432 /* Look for the "this" argument. */
14433 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
14434 if (TYPE_NFIELDS (pfn_type
) == 0
14435 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
14436 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
14439 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
14440 new_type
= alloc_type (objfile
);
14441 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
14442 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
14443 TYPE_VARARGS (pfn_type
));
14444 smash_to_methodptr_type (type
, new_type
);
14448 /* Called when we find the DIE that starts a structure or union scope
14449 (definition) to create a type for the structure or union. Fill in
14450 the type's name and general properties; the members will not be
14451 processed until process_structure_scope. A symbol table entry for
14452 the type will also not be done until process_structure_scope (assuming
14453 the type has a name).
14455 NOTE: we need to call these functions regardless of whether or not the
14456 DIE has a DW_AT_name attribute, since it might be an anonymous
14457 structure or union. This gets the type entered into our set of
14458 user defined types. */
14460 static struct type
*
14461 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14463 struct objfile
*objfile
= cu
->objfile
;
14465 struct attribute
*attr
;
14468 /* If the definition of this type lives in .debug_types, read that type.
14469 Don't follow DW_AT_specification though, that will take us back up
14470 the chain and we want to go down. */
14471 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14474 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14476 /* The type's CU may not be the same as CU.
14477 Ensure TYPE is recorded with CU in die_type_hash. */
14478 return set_die_type (die
, type
, cu
);
14481 type
= alloc_type (objfile
);
14482 INIT_CPLUS_SPECIFIC (type
);
14484 name
= dwarf2_name (die
, cu
);
14487 if (cu
->language
== language_cplus
14488 || cu
->language
== language_d
14489 || cu
->language
== language_rust
)
14491 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
14493 /* dwarf2_full_name might have already finished building the DIE's
14494 type. If so, there is no need to continue. */
14495 if (get_die_type (die
, cu
) != NULL
)
14496 return get_die_type (die
, cu
);
14498 TYPE_TAG_NAME (type
) = full_name
;
14499 if (die
->tag
== DW_TAG_structure_type
14500 || die
->tag
== DW_TAG_class_type
)
14501 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
14505 /* The name is already allocated along with this objfile, so
14506 we don't need to duplicate it for the type. */
14507 TYPE_TAG_NAME (type
) = name
;
14508 if (die
->tag
== DW_TAG_class_type
)
14509 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
14513 if (die
->tag
== DW_TAG_structure_type
)
14515 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
14517 else if (die
->tag
== DW_TAG_union_type
)
14519 TYPE_CODE (type
) = TYPE_CODE_UNION
;
14523 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
14526 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
14527 TYPE_DECLARED_CLASS (type
) = 1;
14529 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14532 if (attr_form_is_constant (attr
))
14533 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14536 /* For the moment, dynamic type sizes are not supported
14537 by GDB's struct type. The actual size is determined
14538 on-demand when resolving the type of a given object,
14539 so set the type's length to zero for now. Otherwise,
14540 we record an expression as the length, and that expression
14541 could lead to a very large value, which could eventually
14542 lead to us trying to allocate that much memory when creating
14543 a value of that type. */
14544 TYPE_LENGTH (type
) = 0;
14549 TYPE_LENGTH (type
) = 0;
14552 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
14554 /* ICC<14 does not output the required DW_AT_declaration on
14555 incomplete types, but gives them a size of zero. */
14556 TYPE_STUB (type
) = 1;
14559 TYPE_STUB_SUPPORTED (type
) = 1;
14561 if (die_is_declaration (die
, cu
))
14562 TYPE_STUB (type
) = 1;
14563 else if (attr
== NULL
&& die
->child
== NULL
14564 && producer_is_realview (cu
->producer
))
14565 /* RealView does not output the required DW_AT_declaration
14566 on incomplete types. */
14567 TYPE_STUB (type
) = 1;
14569 /* We need to add the type field to the die immediately so we don't
14570 infinitely recurse when dealing with pointers to the structure
14571 type within the structure itself. */
14572 set_die_type (die
, type
, cu
);
14574 /* set_die_type should be already done. */
14575 set_descriptive_type (type
, die
, cu
);
14580 /* Finish creating a structure or union type, including filling in
14581 its members and creating a symbol for it. */
14584 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14586 struct objfile
*objfile
= cu
->objfile
;
14587 struct die_info
*child_die
;
14590 type
= get_die_type (die
, cu
);
14592 type
= read_structure_type (die
, cu
);
14594 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
14596 struct field_info fi
;
14597 std::vector
<struct symbol
*> template_args
;
14598 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
14600 memset (&fi
, 0, sizeof (struct field_info
));
14602 child_die
= die
->child
;
14604 while (child_die
&& child_die
->tag
)
14606 if (child_die
->tag
== DW_TAG_member
14607 || child_die
->tag
== DW_TAG_variable
)
14609 /* NOTE: carlton/2002-11-05: A C++ static data member
14610 should be a DW_TAG_member that is a declaration, but
14611 all versions of G++ as of this writing (so through at
14612 least 3.2.1) incorrectly generate DW_TAG_variable
14613 tags for them instead. */
14614 dwarf2_add_field (&fi
, child_die
, cu
);
14616 else if (child_die
->tag
== DW_TAG_subprogram
)
14618 /* Rust doesn't have member functions in the C++ sense.
14619 However, it does emit ordinary functions as children
14620 of a struct DIE. */
14621 if (cu
->language
== language_rust
)
14622 read_func_scope (child_die
, cu
);
14625 /* C++ member function. */
14626 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
14629 else if (child_die
->tag
== DW_TAG_inheritance
)
14631 /* C++ base class field. */
14632 dwarf2_add_field (&fi
, child_die
, cu
);
14634 else if (child_die
->tag
== DW_TAG_typedef
)
14635 dwarf2_add_typedef (&fi
, child_die
, cu
);
14636 else if (child_die
->tag
== DW_TAG_template_type_param
14637 || child_die
->tag
== DW_TAG_template_value_param
)
14639 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
14642 template_args
.push_back (arg
);
14645 child_die
= sibling_die (child_die
);
14648 /* Attach template arguments to type. */
14649 if (!template_args
.empty ())
14651 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14652 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
14653 TYPE_TEMPLATE_ARGUMENTS (type
)
14654 = XOBNEWVEC (&objfile
->objfile_obstack
,
14656 TYPE_N_TEMPLATE_ARGUMENTS (type
));
14657 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
14658 template_args
.data (),
14659 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
14660 * sizeof (struct symbol
*)));
14663 /* Attach fields and member functions to the type. */
14665 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
14668 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
14670 /* Get the type which refers to the base class (possibly this
14671 class itself) which contains the vtable pointer for the current
14672 class from the DW_AT_containing_type attribute. This use of
14673 DW_AT_containing_type is a GNU extension. */
14675 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14677 struct type
*t
= die_containing_type (die
, cu
);
14679 set_type_vptr_basetype (type
, t
);
14684 /* Our own class provides vtbl ptr. */
14685 for (i
= TYPE_NFIELDS (t
) - 1;
14686 i
>= TYPE_N_BASECLASSES (t
);
14689 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
14691 if (is_vtable_name (fieldname
, cu
))
14693 set_type_vptr_fieldno (type
, i
);
14698 /* Complain if virtual function table field not found. */
14699 if (i
< TYPE_N_BASECLASSES (t
))
14700 complaint (&symfile_complaints
,
14701 _("virtual function table pointer "
14702 "not found when defining class '%s'"),
14703 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
14708 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
14711 else if (cu
->producer
14712 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
14714 /* The IBM XLC compiler does not provide direct indication
14715 of the containing type, but the vtable pointer is
14716 always named __vfp. */
14720 for (i
= TYPE_NFIELDS (type
) - 1;
14721 i
>= TYPE_N_BASECLASSES (type
);
14724 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
14726 set_type_vptr_fieldno (type
, i
);
14727 set_type_vptr_basetype (type
, type
);
14734 /* Copy fi.typedef_field_list linked list elements content into the
14735 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
14736 if (fi
.typedef_field_list
)
14738 int i
= fi
.typedef_field_list_count
;
14740 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14741 TYPE_TYPEDEF_FIELD_ARRAY (type
)
14742 = ((struct typedef_field
*)
14743 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
14744 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
14746 /* Reverse the list order to keep the debug info elements order. */
14749 struct typedef_field
*dest
, *src
;
14751 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
14752 src
= &fi
.typedef_field_list
->field
;
14753 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
14758 do_cleanups (back_to
);
14761 quirk_gcc_member_function_pointer (type
, objfile
);
14763 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
14764 snapshots) has been known to create a die giving a declaration
14765 for a class that has, as a child, a die giving a definition for a
14766 nested class. So we have to process our children even if the
14767 current die is a declaration. Normally, of course, a declaration
14768 won't have any children at all. */
14770 child_die
= die
->child
;
14772 while (child_die
!= NULL
&& child_die
->tag
)
14774 if (child_die
->tag
== DW_TAG_member
14775 || child_die
->tag
== DW_TAG_variable
14776 || child_die
->tag
== DW_TAG_inheritance
14777 || child_die
->tag
== DW_TAG_template_value_param
14778 || child_die
->tag
== DW_TAG_template_type_param
)
14783 process_die (child_die
, cu
);
14785 child_die
= sibling_die (child_die
);
14788 /* Do not consider external references. According to the DWARF standard,
14789 these DIEs are identified by the fact that they have no byte_size
14790 attribute, and a declaration attribute. */
14791 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
14792 || !die_is_declaration (die
, cu
))
14793 new_symbol (die
, type
, cu
);
14796 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
14797 update TYPE using some information only available in DIE's children. */
14800 update_enumeration_type_from_children (struct die_info
*die
,
14802 struct dwarf2_cu
*cu
)
14804 struct die_info
*child_die
;
14805 int unsigned_enum
= 1;
14809 auto_obstack obstack
;
14811 for (child_die
= die
->child
;
14812 child_die
!= NULL
&& child_die
->tag
;
14813 child_die
= sibling_die (child_die
))
14815 struct attribute
*attr
;
14817 const gdb_byte
*bytes
;
14818 struct dwarf2_locexpr_baton
*baton
;
14821 if (child_die
->tag
!= DW_TAG_enumerator
)
14824 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
14828 name
= dwarf2_name (child_die
, cu
);
14830 name
= "<anonymous enumerator>";
14832 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
14833 &value
, &bytes
, &baton
);
14839 else if ((mask
& value
) != 0)
14844 /* If we already know that the enum type is neither unsigned, nor
14845 a flag type, no need to look at the rest of the enumerates. */
14846 if (!unsigned_enum
&& !flag_enum
)
14851 TYPE_UNSIGNED (type
) = 1;
14853 TYPE_FLAG_ENUM (type
) = 1;
14856 /* Given a DW_AT_enumeration_type die, set its type. We do not
14857 complete the type's fields yet, or create any symbols. */
14859 static struct type
*
14860 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14862 struct objfile
*objfile
= cu
->objfile
;
14864 struct attribute
*attr
;
14867 /* If the definition of this type lives in .debug_types, read that type.
14868 Don't follow DW_AT_specification though, that will take us back up
14869 the chain and we want to go down. */
14870 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14873 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14875 /* The type's CU may not be the same as CU.
14876 Ensure TYPE is recorded with CU in die_type_hash. */
14877 return set_die_type (die
, type
, cu
);
14880 type
= alloc_type (objfile
);
14882 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
14883 name
= dwarf2_full_name (NULL
, die
, cu
);
14885 TYPE_TAG_NAME (type
) = name
;
14887 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14890 struct type
*underlying_type
= die_type (die
, cu
);
14892 TYPE_TARGET_TYPE (type
) = underlying_type
;
14895 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14898 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14902 TYPE_LENGTH (type
) = 0;
14905 /* The enumeration DIE can be incomplete. In Ada, any type can be
14906 declared as private in the package spec, and then defined only
14907 inside the package body. Such types are known as Taft Amendment
14908 Types. When another package uses such a type, an incomplete DIE
14909 may be generated by the compiler. */
14910 if (die_is_declaration (die
, cu
))
14911 TYPE_STUB (type
) = 1;
14913 /* Finish the creation of this type by using the enum's children.
14914 We must call this even when the underlying type has been provided
14915 so that we can determine if we're looking at a "flag" enum. */
14916 update_enumeration_type_from_children (die
, type
, cu
);
14918 /* If this type has an underlying type that is not a stub, then we
14919 may use its attributes. We always use the "unsigned" attribute
14920 in this situation, because ordinarily we guess whether the type
14921 is unsigned -- but the guess can be wrong and the underlying type
14922 can tell us the reality. However, we defer to a local size
14923 attribute if one exists, because this lets the compiler override
14924 the underlying type if needed. */
14925 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
14927 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
14928 if (TYPE_LENGTH (type
) == 0)
14929 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
14932 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
14934 return set_die_type (die
, type
, cu
);
14937 /* Given a pointer to a die which begins an enumeration, process all
14938 the dies that define the members of the enumeration, and create the
14939 symbol for the enumeration type.
14941 NOTE: We reverse the order of the element list. */
14944 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14946 struct type
*this_type
;
14948 this_type
= get_die_type (die
, cu
);
14949 if (this_type
== NULL
)
14950 this_type
= read_enumeration_type (die
, cu
);
14952 if (die
->child
!= NULL
)
14954 struct die_info
*child_die
;
14955 struct symbol
*sym
;
14956 struct field
*fields
= NULL
;
14957 int num_fields
= 0;
14960 child_die
= die
->child
;
14961 while (child_die
&& child_die
->tag
)
14963 if (child_die
->tag
!= DW_TAG_enumerator
)
14965 process_die (child_die
, cu
);
14969 name
= dwarf2_name (child_die
, cu
);
14972 sym
= new_symbol (child_die
, this_type
, cu
);
14974 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14976 fields
= (struct field
*)
14978 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
14979 * sizeof (struct field
));
14982 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
14983 FIELD_TYPE (fields
[num_fields
]) = NULL
;
14984 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
14985 FIELD_BITSIZE (fields
[num_fields
]) = 0;
14991 child_die
= sibling_die (child_die
);
14996 TYPE_NFIELDS (this_type
) = num_fields
;
14997 TYPE_FIELDS (this_type
) = (struct field
*)
14998 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
14999 memcpy (TYPE_FIELDS (this_type
), fields
,
15000 sizeof (struct field
) * num_fields
);
15005 /* If we are reading an enum from a .debug_types unit, and the enum
15006 is a declaration, and the enum is not the signatured type in the
15007 unit, then we do not want to add a symbol for it. Adding a
15008 symbol would in some cases obscure the true definition of the
15009 enum, giving users an incomplete type when the definition is
15010 actually available. Note that we do not want to do this for all
15011 enums which are just declarations, because C++0x allows forward
15012 enum declarations. */
15013 if (cu
->per_cu
->is_debug_types
15014 && die_is_declaration (die
, cu
))
15016 struct signatured_type
*sig_type
;
15018 sig_type
= (struct signatured_type
*) cu
->per_cu
;
15019 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
15020 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
15024 new_symbol (die
, this_type
, cu
);
15027 /* Extract all information from a DW_TAG_array_type DIE and put it in
15028 the DIE's type field. For now, this only handles one dimensional
15031 static struct type
*
15032 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15034 struct objfile
*objfile
= cu
->objfile
;
15035 struct die_info
*child_die
;
15037 struct type
*element_type
, *range_type
, *index_type
;
15038 struct attribute
*attr
;
15040 unsigned int bit_stride
= 0;
15042 element_type
= die_type (die
, cu
);
15044 /* The die_type call above may have already set the type for this DIE. */
15045 type
= get_die_type (die
, cu
);
15049 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
15051 bit_stride
= DW_UNSND (attr
) * 8;
15053 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
15055 bit_stride
= DW_UNSND (attr
);
15057 /* Irix 6.2 native cc creates array types without children for
15058 arrays with unspecified length. */
15059 if (die
->child
== NULL
)
15061 index_type
= objfile_type (objfile
)->builtin_int
;
15062 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
15063 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
15065 return set_die_type (die
, type
, cu
);
15068 std::vector
<struct type
*> range_types
;
15069 child_die
= die
->child
;
15070 while (child_die
&& child_die
->tag
)
15072 if (child_die
->tag
== DW_TAG_subrange_type
)
15074 struct type
*child_type
= read_type_die (child_die
, cu
);
15076 if (child_type
!= NULL
)
15078 /* The range type was succesfully read. Save it for the
15079 array type creation. */
15080 range_types
.push_back (child_type
);
15083 child_die
= sibling_die (child_die
);
15086 /* Dwarf2 dimensions are output from left to right, create the
15087 necessary array types in backwards order. */
15089 type
= element_type
;
15091 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
15095 while (i
< range_types
.size ())
15096 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
15101 size_t ndim
= range_types
.size ();
15103 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
15107 /* Understand Dwarf2 support for vector types (like they occur on
15108 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
15109 array type. This is not part of the Dwarf2/3 standard yet, but a
15110 custom vendor extension. The main difference between a regular
15111 array and the vector variant is that vectors are passed by value
15113 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
15115 make_vector_type (type
);
15117 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
15118 implementation may choose to implement triple vectors using this
15120 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15123 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
15124 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15126 complaint (&symfile_complaints
,
15127 _("DW_AT_byte_size for array type smaller "
15128 "than the total size of elements"));
15131 name
= dwarf2_name (die
, cu
);
15133 TYPE_NAME (type
) = name
;
15135 /* Install the type in the die. */
15136 set_die_type (die
, type
, cu
);
15138 /* set_die_type should be already done. */
15139 set_descriptive_type (type
, die
, cu
);
15144 static enum dwarf_array_dim_ordering
15145 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
15147 struct attribute
*attr
;
15149 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
15152 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
15154 /* GNU F77 is a special case, as at 08/2004 array type info is the
15155 opposite order to the dwarf2 specification, but data is still
15156 laid out as per normal fortran.
15158 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
15159 version checking. */
15161 if (cu
->language
== language_fortran
15162 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
15164 return DW_ORD_row_major
;
15167 switch (cu
->language_defn
->la_array_ordering
)
15169 case array_column_major
:
15170 return DW_ORD_col_major
;
15171 case array_row_major
:
15173 return DW_ORD_row_major
;
15177 /* Extract all information from a DW_TAG_set_type DIE and put it in
15178 the DIE's type field. */
15180 static struct type
*
15181 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15183 struct type
*domain_type
, *set_type
;
15184 struct attribute
*attr
;
15186 domain_type
= die_type (die
, cu
);
15188 /* The die_type call above may have already set the type for this DIE. */
15189 set_type
= get_die_type (die
, cu
);
15193 set_type
= create_set_type (NULL
, domain_type
);
15195 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15197 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
15199 return set_die_type (die
, set_type
, cu
);
15202 /* A helper for read_common_block that creates a locexpr baton.
15203 SYM is the symbol which we are marking as computed.
15204 COMMON_DIE is the DIE for the common block.
15205 COMMON_LOC is the location expression attribute for the common
15207 MEMBER_LOC is the location expression attribute for the particular
15208 member of the common block that we are processing.
15209 CU is the CU from which the above come. */
15212 mark_common_block_symbol_computed (struct symbol
*sym
,
15213 struct die_info
*common_die
,
15214 struct attribute
*common_loc
,
15215 struct attribute
*member_loc
,
15216 struct dwarf2_cu
*cu
)
15218 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15219 struct dwarf2_locexpr_baton
*baton
;
15221 unsigned int cu_off
;
15222 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
15223 LONGEST offset
= 0;
15225 gdb_assert (common_loc
&& member_loc
);
15226 gdb_assert (attr_form_is_block (common_loc
));
15227 gdb_assert (attr_form_is_block (member_loc
)
15228 || attr_form_is_constant (member_loc
));
15230 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
15231 baton
->per_cu
= cu
->per_cu
;
15232 gdb_assert (baton
->per_cu
);
15234 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
15236 if (attr_form_is_constant (member_loc
))
15238 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
15239 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
15242 baton
->size
+= DW_BLOCK (member_loc
)->size
;
15244 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
15247 *ptr
++ = DW_OP_call4
;
15248 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
15249 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
15252 if (attr_form_is_constant (member_loc
))
15254 *ptr
++ = DW_OP_addr
;
15255 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
15256 ptr
+= cu
->header
.addr_size
;
15260 /* We have to copy the data here, because DW_OP_call4 will only
15261 use a DW_AT_location attribute. */
15262 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
15263 ptr
+= DW_BLOCK (member_loc
)->size
;
15266 *ptr
++ = DW_OP_plus
;
15267 gdb_assert (ptr
- baton
->data
== baton
->size
);
15269 SYMBOL_LOCATION_BATON (sym
) = baton
;
15270 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
15273 /* Create appropriate locally-scoped variables for all the
15274 DW_TAG_common_block entries. Also create a struct common_block
15275 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
15276 is used to sepate the common blocks name namespace from regular
15280 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
15282 struct attribute
*attr
;
15284 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15287 /* Support the .debug_loc offsets. */
15288 if (attr_form_is_block (attr
))
15292 else if (attr_form_is_section_offset (attr
))
15294 dwarf2_complex_location_expr_complaint ();
15299 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15300 "common block member");
15305 if (die
->child
!= NULL
)
15307 struct objfile
*objfile
= cu
->objfile
;
15308 struct die_info
*child_die
;
15309 size_t n_entries
= 0, size
;
15310 struct common_block
*common_block
;
15311 struct symbol
*sym
;
15313 for (child_die
= die
->child
;
15314 child_die
&& child_die
->tag
;
15315 child_die
= sibling_die (child_die
))
15318 size
= (sizeof (struct common_block
)
15319 + (n_entries
- 1) * sizeof (struct symbol
*));
15321 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
15323 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
15324 common_block
->n_entries
= 0;
15326 for (child_die
= die
->child
;
15327 child_die
&& child_die
->tag
;
15328 child_die
= sibling_die (child_die
))
15330 /* Create the symbol in the DW_TAG_common_block block in the current
15332 sym
= new_symbol (child_die
, NULL
, cu
);
15335 struct attribute
*member_loc
;
15337 common_block
->contents
[common_block
->n_entries
++] = sym
;
15339 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
15343 /* GDB has handled this for a long time, but it is
15344 not specified by DWARF. It seems to have been
15345 emitted by gfortran at least as recently as:
15346 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
15347 complaint (&symfile_complaints
,
15348 _("Variable in common block has "
15349 "DW_AT_data_member_location "
15350 "- DIE at 0x%x [in module %s]"),
15351 to_underlying (child_die
->sect_off
),
15352 objfile_name (cu
->objfile
));
15354 if (attr_form_is_section_offset (member_loc
))
15355 dwarf2_complex_location_expr_complaint ();
15356 else if (attr_form_is_constant (member_loc
)
15357 || attr_form_is_block (member_loc
))
15360 mark_common_block_symbol_computed (sym
, die
, attr
,
15364 dwarf2_complex_location_expr_complaint ();
15369 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
15370 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
15374 /* Create a type for a C++ namespace. */
15376 static struct type
*
15377 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15379 struct objfile
*objfile
= cu
->objfile
;
15380 const char *previous_prefix
, *name
;
15384 /* For extensions, reuse the type of the original namespace. */
15385 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
15387 struct die_info
*ext_die
;
15388 struct dwarf2_cu
*ext_cu
= cu
;
15390 ext_die
= dwarf2_extension (die
, &ext_cu
);
15391 type
= read_type_die (ext_die
, ext_cu
);
15393 /* EXT_CU may not be the same as CU.
15394 Ensure TYPE is recorded with CU in die_type_hash. */
15395 return set_die_type (die
, type
, cu
);
15398 name
= namespace_name (die
, &is_anonymous
, cu
);
15400 /* Now build the name of the current namespace. */
15402 previous_prefix
= determine_prefix (die
, cu
);
15403 if (previous_prefix
[0] != '\0')
15404 name
= typename_concat (&objfile
->objfile_obstack
,
15405 previous_prefix
, name
, 0, cu
);
15407 /* Create the type. */
15408 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
15409 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
15411 return set_die_type (die
, type
, cu
);
15414 /* Read a namespace scope. */
15417 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
15419 struct objfile
*objfile
= cu
->objfile
;
15422 /* Add a symbol associated to this if we haven't seen the namespace
15423 before. Also, add a using directive if it's an anonymous
15426 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
15430 type
= read_type_die (die
, cu
);
15431 new_symbol (die
, type
, cu
);
15433 namespace_name (die
, &is_anonymous
, cu
);
15436 const char *previous_prefix
= determine_prefix (die
, cu
);
15438 std::vector
<const char *> excludes
;
15439 add_using_directive (using_directives (cu
->language
),
15440 previous_prefix
, TYPE_NAME (type
), NULL
,
15441 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
15445 if (die
->child
!= NULL
)
15447 struct die_info
*child_die
= die
->child
;
15449 while (child_die
&& child_die
->tag
)
15451 process_die (child_die
, cu
);
15452 child_die
= sibling_die (child_die
);
15457 /* Read a Fortran module as type. This DIE can be only a declaration used for
15458 imported module. Still we need that type as local Fortran "use ... only"
15459 declaration imports depend on the created type in determine_prefix. */
15461 static struct type
*
15462 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15464 struct objfile
*objfile
= cu
->objfile
;
15465 const char *module_name
;
15468 module_name
= dwarf2_name (die
, cu
);
15470 complaint (&symfile_complaints
,
15471 _("DW_TAG_module has no name, offset 0x%x"),
15472 to_underlying (die
->sect_off
));
15473 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
15475 /* determine_prefix uses TYPE_TAG_NAME. */
15476 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
15478 return set_die_type (die
, type
, cu
);
15481 /* Read a Fortran module. */
15484 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
15486 struct die_info
*child_die
= die
->child
;
15489 type
= read_type_die (die
, cu
);
15490 new_symbol (die
, type
, cu
);
15492 while (child_die
&& child_die
->tag
)
15494 process_die (child_die
, cu
);
15495 child_die
= sibling_die (child_die
);
15499 /* Return the name of the namespace represented by DIE. Set
15500 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
15503 static const char *
15504 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
15506 struct die_info
*current_die
;
15507 const char *name
= NULL
;
15509 /* Loop through the extensions until we find a name. */
15511 for (current_die
= die
;
15512 current_die
!= NULL
;
15513 current_die
= dwarf2_extension (die
, &cu
))
15515 /* We don't use dwarf2_name here so that we can detect the absence
15516 of a name -> anonymous namespace. */
15517 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
15523 /* Is it an anonymous namespace? */
15525 *is_anonymous
= (name
== NULL
);
15527 name
= CP_ANONYMOUS_NAMESPACE_STR
;
15532 /* Extract all information from a DW_TAG_pointer_type DIE and add to
15533 the user defined type vector. */
15535 static struct type
*
15536 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15538 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
15539 struct comp_unit_head
*cu_header
= &cu
->header
;
15541 struct attribute
*attr_byte_size
;
15542 struct attribute
*attr_address_class
;
15543 int byte_size
, addr_class
;
15544 struct type
*target_type
;
15546 target_type
= die_type (die
, cu
);
15548 /* The die_type call above may have already set the type for this DIE. */
15549 type
= get_die_type (die
, cu
);
15553 type
= lookup_pointer_type (target_type
);
15555 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15556 if (attr_byte_size
)
15557 byte_size
= DW_UNSND (attr_byte_size
);
15559 byte_size
= cu_header
->addr_size
;
15561 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
15562 if (attr_address_class
)
15563 addr_class
= DW_UNSND (attr_address_class
);
15565 addr_class
= DW_ADDR_none
;
15567 /* If the pointer size or address class is different than the
15568 default, create a type variant marked as such and set the
15569 length accordingly. */
15570 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
15572 if (gdbarch_address_class_type_flags_p (gdbarch
))
15576 type_flags
= gdbarch_address_class_type_flags
15577 (gdbarch
, byte_size
, addr_class
);
15578 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
15580 type
= make_type_with_address_space (type
, type_flags
);
15582 else if (TYPE_LENGTH (type
) != byte_size
)
15584 complaint (&symfile_complaints
,
15585 _("invalid pointer size %d"), byte_size
);
15589 /* Should we also complain about unhandled address classes? */
15593 TYPE_LENGTH (type
) = byte_size
;
15594 return set_die_type (die
, type
, cu
);
15597 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
15598 the user defined type vector. */
15600 static struct type
*
15601 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15604 struct type
*to_type
;
15605 struct type
*domain
;
15607 to_type
= die_type (die
, cu
);
15608 domain
= die_containing_type (die
, cu
);
15610 /* The calls above may have already set the type for this DIE. */
15611 type
= get_die_type (die
, cu
);
15615 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
15616 type
= lookup_methodptr_type (to_type
);
15617 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
15619 struct type
*new_type
= alloc_type (cu
->objfile
);
15621 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
15622 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
15623 TYPE_VARARGS (to_type
));
15624 type
= lookup_methodptr_type (new_type
);
15627 type
= lookup_memberptr_type (to_type
, domain
);
15629 return set_die_type (die
, type
, cu
);
15632 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
15633 the user defined type vector. */
15635 static struct type
*
15636 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
15637 enum type_code refcode
)
15639 struct comp_unit_head
*cu_header
= &cu
->header
;
15640 struct type
*type
, *target_type
;
15641 struct attribute
*attr
;
15643 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
15645 target_type
= die_type (die
, cu
);
15647 /* The die_type call above may have already set the type for this DIE. */
15648 type
= get_die_type (die
, cu
);
15652 type
= lookup_reference_type (target_type
, refcode
);
15653 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15656 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15660 TYPE_LENGTH (type
) = cu_header
->addr_size
;
15662 return set_die_type (die
, type
, cu
);
15665 /* Add the given cv-qualifiers to the element type of the array. GCC
15666 outputs DWARF type qualifiers that apply to an array, not the
15667 element type. But GDB relies on the array element type to carry
15668 the cv-qualifiers. This mimics section 6.7.3 of the C99
15671 static struct type
*
15672 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
15673 struct type
*base_type
, int cnst
, int voltl
)
15675 struct type
*el_type
, *inner_array
;
15677 base_type
= copy_type (base_type
);
15678 inner_array
= base_type
;
15680 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
15682 TYPE_TARGET_TYPE (inner_array
) =
15683 copy_type (TYPE_TARGET_TYPE (inner_array
));
15684 inner_array
= TYPE_TARGET_TYPE (inner_array
);
15687 el_type
= TYPE_TARGET_TYPE (inner_array
);
15688 cnst
|= TYPE_CONST (el_type
);
15689 voltl
|= TYPE_VOLATILE (el_type
);
15690 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
15692 return set_die_type (die
, base_type
, cu
);
15695 static struct type
*
15696 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15698 struct type
*base_type
, *cv_type
;
15700 base_type
= die_type (die
, cu
);
15702 /* The die_type call above may have already set the type for this DIE. */
15703 cv_type
= get_die_type (die
, cu
);
15707 /* In case the const qualifier is applied to an array type, the element type
15708 is so qualified, not the array type (section 6.7.3 of C99). */
15709 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
15710 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
15712 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
15713 return set_die_type (die
, cv_type
, cu
);
15716 static struct type
*
15717 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15719 struct type
*base_type
, *cv_type
;
15721 base_type
= die_type (die
, cu
);
15723 /* The die_type call above may have already set the type for this DIE. */
15724 cv_type
= get_die_type (die
, cu
);
15728 /* In case the volatile qualifier is applied to an array type, the
15729 element type is so qualified, not the array type (section 6.7.3
15731 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
15732 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
15734 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
15735 return set_die_type (die
, cv_type
, cu
);
15738 /* Handle DW_TAG_restrict_type. */
15740 static struct type
*
15741 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15743 struct type
*base_type
, *cv_type
;
15745 base_type
= die_type (die
, cu
);
15747 /* The die_type call above may have already set the type for this DIE. */
15748 cv_type
= get_die_type (die
, cu
);
15752 cv_type
= make_restrict_type (base_type
);
15753 return set_die_type (die
, cv_type
, cu
);
15756 /* Handle DW_TAG_atomic_type. */
15758 static struct type
*
15759 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15761 struct type
*base_type
, *cv_type
;
15763 base_type
= die_type (die
, cu
);
15765 /* The die_type call above may have already set the type for this DIE. */
15766 cv_type
= get_die_type (die
, cu
);
15770 cv_type
= make_atomic_type (base_type
);
15771 return set_die_type (die
, cv_type
, cu
);
15774 /* Extract all information from a DW_TAG_string_type DIE and add to
15775 the user defined type vector. It isn't really a user defined type,
15776 but it behaves like one, with other DIE's using an AT_user_def_type
15777 attribute to reference it. */
15779 static struct type
*
15780 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15782 struct objfile
*objfile
= cu
->objfile
;
15783 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15784 struct type
*type
, *range_type
, *index_type
, *char_type
;
15785 struct attribute
*attr
;
15786 unsigned int length
;
15788 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
15791 length
= DW_UNSND (attr
);
15795 /* Check for the DW_AT_byte_size attribute. */
15796 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15799 length
= DW_UNSND (attr
);
15807 index_type
= objfile_type (objfile
)->builtin_int
;
15808 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
15809 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
15810 type
= create_string_type (NULL
, char_type
, range_type
);
15812 return set_die_type (die
, type
, cu
);
15815 /* Assuming that DIE corresponds to a function, returns nonzero
15816 if the function is prototyped. */
15819 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
15821 struct attribute
*attr
;
15823 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
15824 if (attr
&& (DW_UNSND (attr
) != 0))
15827 /* The DWARF standard implies that the DW_AT_prototyped attribute
15828 is only meaninful for C, but the concept also extends to other
15829 languages that allow unprototyped functions (Eg: Objective C).
15830 For all other languages, assume that functions are always
15832 if (cu
->language
!= language_c
15833 && cu
->language
!= language_objc
15834 && cu
->language
!= language_opencl
)
15837 /* RealView does not emit DW_AT_prototyped. We can not distinguish
15838 prototyped and unprototyped functions; default to prototyped,
15839 since that is more common in modern code (and RealView warns
15840 about unprototyped functions). */
15841 if (producer_is_realview (cu
->producer
))
15847 /* Handle DIES due to C code like:
15851 int (*funcp)(int a, long l);
15855 ('funcp' generates a DW_TAG_subroutine_type DIE). */
15857 static struct type
*
15858 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15860 struct objfile
*objfile
= cu
->objfile
;
15861 struct type
*type
; /* Type that this function returns. */
15862 struct type
*ftype
; /* Function that returns above type. */
15863 struct attribute
*attr
;
15865 type
= die_type (die
, cu
);
15867 /* The die_type call above may have already set the type for this DIE. */
15868 ftype
= get_die_type (die
, cu
);
15872 ftype
= lookup_function_type (type
);
15874 if (prototyped_function_p (die
, cu
))
15875 TYPE_PROTOTYPED (ftype
) = 1;
15877 /* Store the calling convention in the type if it's available in
15878 the subroutine die. Otherwise set the calling convention to
15879 the default value DW_CC_normal. */
15880 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15882 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
15883 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
15884 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
15886 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
15888 /* Record whether the function returns normally to its caller or not
15889 if the DWARF producer set that information. */
15890 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
15891 if (attr
&& (DW_UNSND (attr
) != 0))
15892 TYPE_NO_RETURN (ftype
) = 1;
15894 /* We need to add the subroutine type to the die immediately so
15895 we don't infinitely recurse when dealing with parameters
15896 declared as the same subroutine type. */
15897 set_die_type (die
, ftype
, cu
);
15899 if (die
->child
!= NULL
)
15901 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
15902 struct die_info
*child_die
;
15903 int nparams
, iparams
;
15905 /* Count the number of parameters.
15906 FIXME: GDB currently ignores vararg functions, but knows about
15907 vararg member functions. */
15909 child_die
= die
->child
;
15910 while (child_die
&& child_die
->tag
)
15912 if (child_die
->tag
== DW_TAG_formal_parameter
)
15914 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
15915 TYPE_VARARGS (ftype
) = 1;
15916 child_die
= sibling_die (child_die
);
15919 /* Allocate storage for parameters and fill them in. */
15920 TYPE_NFIELDS (ftype
) = nparams
;
15921 TYPE_FIELDS (ftype
) = (struct field
*)
15922 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
15924 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
15925 even if we error out during the parameters reading below. */
15926 for (iparams
= 0; iparams
< nparams
; iparams
++)
15927 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
15930 child_die
= die
->child
;
15931 while (child_die
&& child_die
->tag
)
15933 if (child_die
->tag
== DW_TAG_formal_parameter
)
15935 struct type
*arg_type
;
15937 /* DWARF version 2 has no clean way to discern C++
15938 static and non-static member functions. G++ helps
15939 GDB by marking the first parameter for non-static
15940 member functions (which is the this pointer) as
15941 artificial. We pass this information to
15942 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
15944 DWARF version 3 added DW_AT_object_pointer, which GCC
15945 4.5 does not yet generate. */
15946 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
15948 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
15950 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
15951 arg_type
= die_type (child_die
, cu
);
15953 /* RealView does not mark THIS as const, which the testsuite
15954 expects. GCC marks THIS as const in method definitions,
15955 but not in the class specifications (GCC PR 43053). */
15956 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
15957 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
15960 struct dwarf2_cu
*arg_cu
= cu
;
15961 const char *name
= dwarf2_name (child_die
, cu
);
15963 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
15966 /* If the compiler emits this, use it. */
15967 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
15970 else if (name
&& strcmp (name
, "this") == 0)
15971 /* Function definitions will have the argument names. */
15973 else if (name
== NULL
&& iparams
== 0)
15974 /* Declarations may not have the names, so like
15975 elsewhere in GDB, assume an artificial first
15976 argument is "this". */
15980 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
15984 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
15987 child_die
= sibling_die (child_die
);
15994 static struct type
*
15995 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
15997 struct objfile
*objfile
= cu
->objfile
;
15998 const char *name
= NULL
;
15999 struct type
*this_type
, *target_type
;
16001 name
= dwarf2_full_name (NULL
, die
, cu
);
16002 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
16003 TYPE_TARGET_STUB (this_type
) = 1;
16004 set_die_type (die
, this_type
, cu
);
16005 target_type
= die_type (die
, cu
);
16006 if (target_type
!= this_type
)
16007 TYPE_TARGET_TYPE (this_type
) = target_type
;
16010 /* Self-referential typedefs are, it seems, not allowed by the DWARF
16011 spec and cause infinite loops in GDB. */
16012 complaint (&symfile_complaints
,
16013 _("Self-referential DW_TAG_typedef "
16014 "- DIE at 0x%x [in module %s]"),
16015 to_underlying (die
->sect_off
), objfile_name (objfile
));
16016 TYPE_TARGET_TYPE (this_type
) = NULL
;
16021 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
16022 (which may be different from NAME) to the architecture back-end to allow
16023 it to guess the correct format if necessary. */
16025 static struct type
*
16026 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
16027 const char *name_hint
)
16029 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16030 const struct floatformat
**format
;
16033 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
16035 type
= init_float_type (objfile
, bits
, name
, format
);
16037 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
16042 /* Find a representation of a given base type and install
16043 it in the TYPE field of the die. */
16045 static struct type
*
16046 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16048 struct objfile
*objfile
= cu
->objfile
;
16050 struct attribute
*attr
;
16051 int encoding
= 0, bits
= 0;
16054 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
16057 encoding
= DW_UNSND (attr
);
16059 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16062 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
16064 name
= dwarf2_name (die
, cu
);
16067 complaint (&symfile_complaints
,
16068 _("DW_AT_name missing from DW_TAG_base_type"));
16073 case DW_ATE_address
:
16074 /* Turn DW_ATE_address into a void * pointer. */
16075 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
16076 type
= init_pointer_type (objfile
, bits
, name
, type
);
16078 case DW_ATE_boolean
:
16079 type
= init_boolean_type (objfile
, bits
, 1, name
);
16081 case DW_ATE_complex_float
:
16082 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
16083 type
= init_complex_type (objfile
, name
, type
);
16085 case DW_ATE_decimal_float
:
16086 type
= init_decfloat_type (objfile
, bits
, name
);
16089 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
16091 case DW_ATE_signed
:
16092 type
= init_integer_type (objfile
, bits
, 0, name
);
16094 case DW_ATE_unsigned
:
16095 if (cu
->language
== language_fortran
16097 && startswith (name
, "character("))
16098 type
= init_character_type (objfile
, bits
, 1, name
);
16100 type
= init_integer_type (objfile
, bits
, 1, name
);
16102 case DW_ATE_signed_char
:
16103 if (cu
->language
== language_ada
|| cu
->language
== language_m2
16104 || cu
->language
== language_pascal
16105 || cu
->language
== language_fortran
)
16106 type
= init_character_type (objfile
, bits
, 0, name
);
16108 type
= init_integer_type (objfile
, bits
, 0, name
);
16110 case DW_ATE_unsigned_char
:
16111 if (cu
->language
== language_ada
|| cu
->language
== language_m2
16112 || cu
->language
== language_pascal
16113 || cu
->language
== language_fortran
16114 || cu
->language
== language_rust
)
16115 type
= init_character_type (objfile
, bits
, 1, name
);
16117 type
= init_integer_type (objfile
, bits
, 1, name
);
16121 gdbarch
*arch
= get_objfile_arch (objfile
);
16124 type
= builtin_type (arch
)->builtin_char16
;
16125 else if (bits
== 32)
16126 type
= builtin_type (arch
)->builtin_char32
;
16129 complaint (&symfile_complaints
,
16130 _("unsupported DW_ATE_UTF bit size: '%d'"),
16132 type
= init_integer_type (objfile
, bits
, 1, name
);
16134 return set_die_type (die
, type
, cu
);
16139 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
16140 dwarf_type_encoding_name (encoding
));
16141 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
16145 if (name
&& strcmp (name
, "char") == 0)
16146 TYPE_NOSIGN (type
) = 1;
16148 return set_die_type (die
, type
, cu
);
16151 /* Parse dwarf attribute if it's a block, reference or constant and put the
16152 resulting value of the attribute into struct bound_prop.
16153 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
16156 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
16157 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
16159 struct dwarf2_property_baton
*baton
;
16160 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
16162 if (attr
== NULL
|| prop
== NULL
)
16165 if (attr_form_is_block (attr
))
16167 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16168 baton
->referenced_type
= NULL
;
16169 baton
->locexpr
.per_cu
= cu
->per_cu
;
16170 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
16171 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
16172 prop
->data
.baton
= baton
;
16173 prop
->kind
= PROP_LOCEXPR
;
16174 gdb_assert (prop
->data
.baton
!= NULL
);
16176 else if (attr_form_is_ref (attr
))
16178 struct dwarf2_cu
*target_cu
= cu
;
16179 struct die_info
*target_die
;
16180 struct attribute
*target_attr
;
16182 target_die
= follow_die_ref (die
, attr
, &target_cu
);
16183 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
16184 if (target_attr
== NULL
)
16185 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
16187 if (target_attr
== NULL
)
16190 switch (target_attr
->name
)
16192 case DW_AT_location
:
16193 if (attr_form_is_section_offset (target_attr
))
16195 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16196 baton
->referenced_type
= die_type (target_die
, target_cu
);
16197 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
16198 prop
->data
.baton
= baton
;
16199 prop
->kind
= PROP_LOCLIST
;
16200 gdb_assert (prop
->data
.baton
!= NULL
);
16202 else if (attr_form_is_block (target_attr
))
16204 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16205 baton
->referenced_type
= die_type (target_die
, target_cu
);
16206 baton
->locexpr
.per_cu
= cu
->per_cu
;
16207 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
16208 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
16209 prop
->data
.baton
= baton
;
16210 prop
->kind
= PROP_LOCEXPR
;
16211 gdb_assert (prop
->data
.baton
!= NULL
);
16215 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16216 "dynamic property");
16220 case DW_AT_data_member_location
:
16224 if (!handle_data_member_location (target_die
, target_cu
,
16228 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16229 baton
->referenced_type
= read_type_die (target_die
->parent
,
16231 baton
->offset_info
.offset
= offset
;
16232 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
16233 prop
->data
.baton
= baton
;
16234 prop
->kind
= PROP_ADDR_OFFSET
;
16239 else if (attr_form_is_constant (attr
))
16241 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
16242 prop
->kind
= PROP_CONST
;
16246 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
16247 dwarf2_name (die
, cu
));
16254 /* Read the given DW_AT_subrange DIE. */
16256 static struct type
*
16257 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16259 struct type
*base_type
, *orig_base_type
;
16260 struct type
*range_type
;
16261 struct attribute
*attr
;
16262 struct dynamic_prop low
, high
;
16263 int low_default_is_valid
;
16264 int high_bound_is_count
= 0;
16266 LONGEST negative_mask
;
16268 orig_base_type
= die_type (die
, cu
);
16269 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
16270 whereas the real type might be. So, we use ORIG_BASE_TYPE when
16271 creating the range type, but we use the result of check_typedef
16272 when examining properties of the type. */
16273 base_type
= check_typedef (orig_base_type
);
16275 /* The die_type call above may have already set the type for this DIE. */
16276 range_type
= get_die_type (die
, cu
);
16280 low
.kind
= PROP_CONST
;
16281 high
.kind
= PROP_CONST
;
16282 high
.data
.const_val
= 0;
16284 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
16285 omitting DW_AT_lower_bound. */
16286 switch (cu
->language
)
16289 case language_cplus
:
16290 low
.data
.const_val
= 0;
16291 low_default_is_valid
= 1;
16293 case language_fortran
:
16294 low
.data
.const_val
= 1;
16295 low_default_is_valid
= 1;
16298 case language_objc
:
16299 case language_rust
:
16300 low
.data
.const_val
= 0;
16301 low_default_is_valid
= (cu
->header
.version
>= 4);
16305 case language_pascal
:
16306 low
.data
.const_val
= 1;
16307 low_default_is_valid
= (cu
->header
.version
>= 4);
16310 low
.data
.const_val
= 0;
16311 low_default_is_valid
= 0;
16315 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
16317 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
16318 else if (!low_default_is_valid
)
16319 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
16320 "- DIE at 0x%x [in module %s]"),
16321 to_underlying (die
->sect_off
), objfile_name (cu
->objfile
));
16323 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
16324 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
16326 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
16327 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
16329 /* If bounds are constant do the final calculation here. */
16330 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
16331 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
16333 high_bound_is_count
= 1;
16337 /* Dwarf-2 specifications explicitly allows to create subrange types
16338 without specifying a base type.
16339 In that case, the base type must be set to the type of
16340 the lower bound, upper bound or count, in that order, if any of these
16341 three attributes references an object that has a type.
16342 If no base type is found, the Dwarf-2 specifications say that
16343 a signed integer type of size equal to the size of an address should
16345 For the following C code: `extern char gdb_int [];'
16346 GCC produces an empty range DIE.
16347 FIXME: muller/2010-05-28: Possible references to object for low bound,
16348 high bound or count are not yet handled by this code. */
16349 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
16351 struct objfile
*objfile
= cu
->objfile
;
16352 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16353 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
16354 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
16356 /* Test "int", "long int", and "long long int" objfile types,
16357 and select the first one having a size above or equal to the
16358 architecture address size. */
16359 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16360 base_type
= int_type
;
16363 int_type
= objfile_type (objfile
)->builtin_long
;
16364 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16365 base_type
= int_type
;
16368 int_type
= objfile_type (objfile
)->builtin_long_long
;
16369 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16370 base_type
= int_type
;
16375 /* Normally, the DWARF producers are expected to use a signed
16376 constant form (Eg. DW_FORM_sdata) to express negative bounds.
16377 But this is unfortunately not always the case, as witnessed
16378 with GCC, for instance, where the ambiguous DW_FORM_dataN form
16379 is used instead. To work around that ambiguity, we treat
16380 the bounds as signed, and thus sign-extend their values, when
16381 the base type is signed. */
16383 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
16384 if (low
.kind
== PROP_CONST
16385 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
16386 low
.data
.const_val
|= negative_mask
;
16387 if (high
.kind
== PROP_CONST
16388 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
16389 high
.data
.const_val
|= negative_mask
;
16391 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
16393 if (high_bound_is_count
)
16394 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
16396 /* Ada expects an empty array on no boundary attributes. */
16397 if (attr
== NULL
&& cu
->language
!= language_ada
)
16398 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
16400 name
= dwarf2_name (die
, cu
);
16402 TYPE_NAME (range_type
) = name
;
16404 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16406 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
16408 set_die_type (die
, range_type
, cu
);
16410 /* set_die_type should be already done. */
16411 set_descriptive_type (range_type
, die
, cu
);
16416 static struct type
*
16417 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16421 /* For now, we only support the C meaning of an unspecified type: void. */
16423 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
16424 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
16426 return set_die_type (die
, type
, cu
);
16429 /* Read a single die and all its descendents. Set the die's sibling
16430 field to NULL; set other fields in the die correctly, and set all
16431 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
16432 location of the info_ptr after reading all of those dies. PARENT
16433 is the parent of the die in question. */
16435 static struct die_info
*
16436 read_die_and_children (const struct die_reader_specs
*reader
,
16437 const gdb_byte
*info_ptr
,
16438 const gdb_byte
**new_info_ptr
,
16439 struct die_info
*parent
)
16441 struct die_info
*die
;
16442 const gdb_byte
*cur_ptr
;
16445 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
16448 *new_info_ptr
= cur_ptr
;
16451 store_in_ref_table (die
, reader
->cu
);
16454 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
16458 *new_info_ptr
= cur_ptr
;
16461 die
->sibling
= NULL
;
16462 die
->parent
= parent
;
16466 /* Read a die, all of its descendents, and all of its siblings; set
16467 all of the fields of all of the dies correctly. Arguments are as
16468 in read_die_and_children. */
16470 static struct die_info
*
16471 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
16472 const gdb_byte
*info_ptr
,
16473 const gdb_byte
**new_info_ptr
,
16474 struct die_info
*parent
)
16476 struct die_info
*first_die
, *last_sibling
;
16477 const gdb_byte
*cur_ptr
;
16479 cur_ptr
= info_ptr
;
16480 first_die
= last_sibling
= NULL
;
16484 struct die_info
*die
16485 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
16489 *new_info_ptr
= cur_ptr
;
16496 last_sibling
->sibling
= die
;
16498 last_sibling
= die
;
16502 /* Read a die, all of its descendents, and all of its siblings; set
16503 all of the fields of all of the dies correctly. Arguments are as
16504 in read_die_and_children.
16505 This the main entry point for reading a DIE and all its children. */
16507 static struct die_info
*
16508 read_die_and_siblings (const struct die_reader_specs
*reader
,
16509 const gdb_byte
*info_ptr
,
16510 const gdb_byte
**new_info_ptr
,
16511 struct die_info
*parent
)
16513 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
16514 new_info_ptr
, parent
);
16516 if (dwarf_die_debug
)
16518 fprintf_unfiltered (gdb_stdlog
,
16519 "Read die from %s@0x%x of %s:\n",
16520 get_section_name (reader
->die_section
),
16521 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
16522 bfd_get_filename (reader
->abfd
));
16523 dump_die (die
, dwarf_die_debug
);
16529 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
16531 The caller is responsible for filling in the extra attributes
16532 and updating (*DIEP)->num_attrs.
16533 Set DIEP to point to a newly allocated die with its information,
16534 except for its child, sibling, and parent fields.
16535 Set HAS_CHILDREN to tell whether the die has children or not. */
16537 static const gdb_byte
*
16538 read_full_die_1 (const struct die_reader_specs
*reader
,
16539 struct die_info
**diep
, const gdb_byte
*info_ptr
,
16540 int *has_children
, int num_extra_attrs
)
16542 unsigned int abbrev_number
, bytes_read
, i
;
16543 struct abbrev_info
*abbrev
;
16544 struct die_info
*die
;
16545 struct dwarf2_cu
*cu
= reader
->cu
;
16546 bfd
*abfd
= reader
->abfd
;
16548 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
16549 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16550 info_ptr
+= bytes_read
;
16551 if (!abbrev_number
)
16558 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
16560 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
16562 bfd_get_filename (abfd
));
16564 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
16565 die
->sect_off
= sect_off
;
16566 die
->tag
= abbrev
->tag
;
16567 die
->abbrev
= abbrev_number
;
16569 /* Make the result usable.
16570 The caller needs to update num_attrs after adding the extra
16572 die
->num_attrs
= abbrev
->num_attrs
;
16574 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16575 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
16579 *has_children
= abbrev
->has_children
;
16583 /* Read a die and all its attributes.
16584 Set DIEP to point to a newly allocated die with its information,
16585 except for its child, sibling, and parent fields.
16586 Set HAS_CHILDREN to tell whether the die has children or not. */
16588 static const gdb_byte
*
16589 read_full_die (const struct die_reader_specs
*reader
,
16590 struct die_info
**diep
, const gdb_byte
*info_ptr
,
16593 const gdb_byte
*result
;
16595 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
16597 if (dwarf_die_debug
)
16599 fprintf_unfiltered (gdb_stdlog
,
16600 "Read die from %s@0x%x of %s:\n",
16601 get_section_name (reader
->die_section
),
16602 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
16603 bfd_get_filename (reader
->abfd
));
16604 dump_die (*diep
, dwarf_die_debug
);
16610 /* Abbreviation tables.
16612 In DWARF version 2, the description of the debugging information is
16613 stored in a separate .debug_abbrev section. Before we read any
16614 dies from a section we read in all abbreviations and install them
16615 in a hash table. */
16617 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
16619 static struct abbrev_info
*
16620 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
16622 struct abbrev_info
*abbrev
;
16624 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
16625 memset (abbrev
, 0, sizeof (struct abbrev_info
));
16630 /* Add an abbreviation to the table. */
16633 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
16634 unsigned int abbrev_number
,
16635 struct abbrev_info
*abbrev
)
16637 unsigned int hash_number
;
16639 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
16640 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
16641 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
16644 /* Look up an abbrev in the table.
16645 Returns NULL if the abbrev is not found. */
16647 static struct abbrev_info
*
16648 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
16649 unsigned int abbrev_number
)
16651 unsigned int hash_number
;
16652 struct abbrev_info
*abbrev
;
16654 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
16655 abbrev
= abbrev_table
->abbrevs
[hash_number
];
16659 if (abbrev
->number
== abbrev_number
)
16661 abbrev
= abbrev
->next
;
16666 /* Read in an abbrev table. */
16668 static struct abbrev_table
*
16669 abbrev_table_read_table (struct dwarf2_section_info
*section
,
16670 sect_offset sect_off
)
16672 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16673 bfd
*abfd
= get_section_bfd_owner (section
);
16674 struct abbrev_table
*abbrev_table
;
16675 const gdb_byte
*abbrev_ptr
;
16676 struct abbrev_info
*cur_abbrev
;
16677 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
16678 unsigned int abbrev_form
;
16679 struct attr_abbrev
*cur_attrs
;
16680 unsigned int allocated_attrs
;
16682 abbrev_table
= XNEW (struct abbrev_table
);
16683 abbrev_table
->sect_off
= sect_off
;
16684 obstack_init (&abbrev_table
->abbrev_obstack
);
16685 abbrev_table
->abbrevs
=
16686 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
16688 memset (abbrev_table
->abbrevs
, 0,
16689 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
16691 dwarf2_read_section (objfile
, section
);
16692 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
16693 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16694 abbrev_ptr
+= bytes_read
;
16696 allocated_attrs
= ATTR_ALLOC_CHUNK
;
16697 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
16699 /* Loop until we reach an abbrev number of 0. */
16700 while (abbrev_number
)
16702 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
16704 /* read in abbrev header */
16705 cur_abbrev
->number
= abbrev_number
;
16707 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16708 abbrev_ptr
+= bytes_read
;
16709 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
16712 /* now read in declarations */
16715 LONGEST implicit_const
;
16717 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16718 abbrev_ptr
+= bytes_read
;
16719 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16720 abbrev_ptr
+= bytes_read
;
16721 if (abbrev_form
== DW_FORM_implicit_const
)
16723 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
16725 abbrev_ptr
+= bytes_read
;
16729 /* Initialize it due to a false compiler warning. */
16730 implicit_const
= -1;
16733 if (abbrev_name
== 0)
16736 if (cur_abbrev
->num_attrs
== allocated_attrs
)
16738 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
16740 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
16743 cur_attrs
[cur_abbrev
->num_attrs
].name
16744 = (enum dwarf_attribute
) abbrev_name
;
16745 cur_attrs
[cur_abbrev
->num_attrs
].form
16746 = (enum dwarf_form
) abbrev_form
;
16747 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
16748 ++cur_abbrev
->num_attrs
;
16751 cur_abbrev
->attrs
=
16752 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
16753 cur_abbrev
->num_attrs
);
16754 memcpy (cur_abbrev
->attrs
, cur_attrs
,
16755 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
16757 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
16759 /* Get next abbreviation.
16760 Under Irix6 the abbreviations for a compilation unit are not
16761 always properly terminated with an abbrev number of 0.
16762 Exit loop if we encounter an abbreviation which we have
16763 already read (which means we are about to read the abbreviations
16764 for the next compile unit) or if the end of the abbreviation
16765 table is reached. */
16766 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
16768 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16769 abbrev_ptr
+= bytes_read
;
16770 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
16775 return abbrev_table
;
16778 /* Free the resources held by ABBREV_TABLE. */
16781 abbrev_table_free (struct abbrev_table
*abbrev_table
)
16783 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
16784 xfree (abbrev_table
);
16787 /* Same as abbrev_table_free but as a cleanup.
16788 We pass in a pointer to the pointer to the table so that we can
16789 set the pointer to NULL when we're done. It also simplifies
16790 build_type_psymtabs_1. */
16793 abbrev_table_free_cleanup (void *table_ptr
)
16795 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
16797 if (*abbrev_table_ptr
!= NULL
)
16798 abbrev_table_free (*abbrev_table_ptr
);
16799 *abbrev_table_ptr
= NULL
;
16802 /* Read the abbrev table for CU from ABBREV_SECTION. */
16805 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
16806 struct dwarf2_section_info
*abbrev_section
)
16809 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_sect_off
);
16812 /* Release the memory used by the abbrev table for a compilation unit. */
16815 dwarf2_free_abbrev_table (void *ptr_to_cu
)
16817 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
16819 if (cu
->abbrev_table
!= NULL
)
16820 abbrev_table_free (cu
->abbrev_table
);
16821 /* Set this to NULL so that we SEGV if we try to read it later,
16822 and also because free_comp_unit verifies this is NULL. */
16823 cu
->abbrev_table
= NULL
;
16826 /* Returns nonzero if TAG represents a type that we might generate a partial
16830 is_type_tag_for_partial (int tag
)
16835 /* Some types that would be reasonable to generate partial symbols for,
16836 that we don't at present. */
16837 case DW_TAG_array_type
:
16838 case DW_TAG_file_type
:
16839 case DW_TAG_ptr_to_member_type
:
16840 case DW_TAG_set_type
:
16841 case DW_TAG_string_type
:
16842 case DW_TAG_subroutine_type
:
16844 case DW_TAG_base_type
:
16845 case DW_TAG_class_type
:
16846 case DW_TAG_interface_type
:
16847 case DW_TAG_enumeration_type
:
16848 case DW_TAG_structure_type
:
16849 case DW_TAG_subrange_type
:
16850 case DW_TAG_typedef
:
16851 case DW_TAG_union_type
:
16858 /* Load all DIEs that are interesting for partial symbols into memory. */
16860 static struct partial_die_info
*
16861 load_partial_dies (const struct die_reader_specs
*reader
,
16862 const gdb_byte
*info_ptr
, int building_psymtab
)
16864 struct dwarf2_cu
*cu
= reader
->cu
;
16865 struct objfile
*objfile
= cu
->objfile
;
16866 struct partial_die_info
*part_die
;
16867 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
16868 struct abbrev_info
*abbrev
;
16869 unsigned int bytes_read
;
16870 unsigned int load_all
= 0;
16871 int nesting_level
= 1;
16876 gdb_assert (cu
->per_cu
!= NULL
);
16877 if (cu
->per_cu
->load_all_dies
)
16881 = htab_create_alloc_ex (cu
->header
.length
/ 12,
16885 &cu
->comp_unit_obstack
,
16886 hashtab_obstack_allocate
,
16887 dummy_obstack_deallocate
);
16889 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16893 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
16895 /* A NULL abbrev means the end of a series of children. */
16896 if (abbrev
== NULL
)
16898 if (--nesting_level
== 0)
16900 /* PART_DIE was probably the last thing allocated on the
16901 comp_unit_obstack, so we could call obstack_free
16902 here. We don't do that because the waste is small,
16903 and will be cleaned up when we're done with this
16904 compilation unit. This way, we're also more robust
16905 against other users of the comp_unit_obstack. */
16908 info_ptr
+= bytes_read
;
16909 last_die
= parent_die
;
16910 parent_die
= parent_die
->die_parent
;
16914 /* Check for template arguments. We never save these; if
16915 they're seen, we just mark the parent, and go on our way. */
16916 if (parent_die
!= NULL
16917 && cu
->language
== language_cplus
16918 && (abbrev
->tag
== DW_TAG_template_type_param
16919 || abbrev
->tag
== DW_TAG_template_value_param
))
16921 parent_die
->has_template_arguments
= 1;
16925 /* We don't need a partial DIE for the template argument. */
16926 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16931 /* We only recurse into c++ subprograms looking for template arguments.
16932 Skip their other children. */
16934 && cu
->language
== language_cplus
16935 && parent_die
!= NULL
16936 && parent_die
->tag
== DW_TAG_subprogram
)
16938 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16942 /* Check whether this DIE is interesting enough to save. Normally
16943 we would not be interested in members here, but there may be
16944 later variables referencing them via DW_AT_specification (for
16945 static members). */
16947 && !is_type_tag_for_partial (abbrev
->tag
)
16948 && abbrev
->tag
!= DW_TAG_constant
16949 && abbrev
->tag
!= DW_TAG_enumerator
16950 && abbrev
->tag
!= DW_TAG_subprogram
16951 && abbrev
->tag
!= DW_TAG_lexical_block
16952 && abbrev
->tag
!= DW_TAG_variable
16953 && abbrev
->tag
!= DW_TAG_namespace
16954 && abbrev
->tag
!= DW_TAG_module
16955 && abbrev
->tag
!= DW_TAG_member
16956 && abbrev
->tag
!= DW_TAG_imported_unit
16957 && abbrev
->tag
!= DW_TAG_imported_declaration
)
16959 /* Otherwise we skip to the next sibling, if any. */
16960 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16964 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
16967 /* This two-pass algorithm for processing partial symbols has a
16968 high cost in cache pressure. Thus, handle some simple cases
16969 here which cover the majority of C partial symbols. DIEs
16970 which neither have specification tags in them, nor could have
16971 specification tags elsewhere pointing at them, can simply be
16972 processed and discarded.
16974 This segment is also optional; scan_partial_symbols and
16975 add_partial_symbol will handle these DIEs if we chain
16976 them in normally. When compilers which do not emit large
16977 quantities of duplicate debug information are more common,
16978 this code can probably be removed. */
16980 /* Any complete simple types at the top level (pretty much all
16981 of them, for a language without namespaces), can be processed
16983 if (parent_die
== NULL
16984 && part_die
->has_specification
== 0
16985 && part_die
->is_declaration
== 0
16986 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
16987 || part_die
->tag
== DW_TAG_base_type
16988 || part_die
->tag
== DW_TAG_subrange_type
))
16990 if (building_psymtab
&& part_die
->name
!= NULL
)
16991 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16992 VAR_DOMAIN
, LOC_TYPEDEF
,
16993 &objfile
->static_psymbols
,
16994 0, cu
->language
, objfile
);
16995 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16999 /* The exception for DW_TAG_typedef with has_children above is
17000 a workaround of GCC PR debug/47510. In the case of this complaint
17001 type_name_no_tag_or_error will error on such types later.
17003 GDB skipped children of DW_TAG_typedef by the shortcut above and then
17004 it could not find the child DIEs referenced later, this is checked
17005 above. In correct DWARF DW_TAG_typedef should have no children. */
17007 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
17008 complaint (&symfile_complaints
,
17009 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
17010 "- DIE at 0x%x [in module %s]"),
17011 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
17013 /* If we're at the second level, and we're an enumerator, and
17014 our parent has no specification (meaning possibly lives in a
17015 namespace elsewhere), then we can add the partial symbol now
17016 instead of queueing it. */
17017 if (part_die
->tag
== DW_TAG_enumerator
17018 && parent_die
!= NULL
17019 && parent_die
->die_parent
== NULL
17020 && parent_die
->tag
== DW_TAG_enumeration_type
17021 && parent_die
->has_specification
== 0)
17023 if (part_die
->name
== NULL
)
17024 complaint (&symfile_complaints
,
17025 _("malformed enumerator DIE ignored"));
17026 else if (building_psymtab
)
17027 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
17028 VAR_DOMAIN
, LOC_CONST
,
17029 cu
->language
== language_cplus
17030 ? &objfile
->global_psymbols
17031 : &objfile
->static_psymbols
,
17032 0, cu
->language
, objfile
);
17034 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
17038 /* We'll save this DIE so link it in. */
17039 part_die
->die_parent
= parent_die
;
17040 part_die
->die_sibling
= NULL
;
17041 part_die
->die_child
= NULL
;
17043 if (last_die
&& last_die
== parent_die
)
17044 last_die
->die_child
= part_die
;
17046 last_die
->die_sibling
= part_die
;
17048 last_die
= part_die
;
17050 if (first_die
== NULL
)
17051 first_die
= part_die
;
17053 /* Maybe add the DIE to the hash table. Not all DIEs that we
17054 find interesting need to be in the hash table, because we
17055 also have the parent/sibling/child chains; only those that we
17056 might refer to by offset later during partial symbol reading.
17058 For now this means things that might have be the target of a
17059 DW_AT_specification, DW_AT_abstract_origin, or
17060 DW_AT_extension. DW_AT_extension will refer only to
17061 namespaces; DW_AT_abstract_origin refers to functions (and
17062 many things under the function DIE, but we do not recurse
17063 into function DIEs during partial symbol reading) and
17064 possibly variables as well; DW_AT_specification refers to
17065 declarations. Declarations ought to have the DW_AT_declaration
17066 flag. It happens that GCC forgets to put it in sometimes, but
17067 only for functions, not for types.
17069 Adding more things than necessary to the hash table is harmless
17070 except for the performance cost. Adding too few will result in
17071 wasted time in find_partial_die, when we reread the compilation
17072 unit with load_all_dies set. */
17075 || abbrev
->tag
== DW_TAG_constant
17076 || abbrev
->tag
== DW_TAG_subprogram
17077 || abbrev
->tag
== DW_TAG_variable
17078 || abbrev
->tag
== DW_TAG_namespace
17079 || part_die
->is_declaration
)
17083 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
17084 to_underlying (part_die
->sect_off
),
17089 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
17091 /* For some DIEs we want to follow their children (if any). For C
17092 we have no reason to follow the children of structures; for other
17093 languages we have to, so that we can get at method physnames
17094 to infer fully qualified class names, for DW_AT_specification,
17095 and for C++ template arguments. For C++, we also look one level
17096 inside functions to find template arguments (if the name of the
17097 function does not already contain the template arguments).
17099 For Ada, we need to scan the children of subprograms and lexical
17100 blocks as well because Ada allows the definition of nested
17101 entities that could be interesting for the debugger, such as
17102 nested subprograms for instance. */
17103 if (last_die
->has_children
17105 || last_die
->tag
== DW_TAG_namespace
17106 || last_die
->tag
== DW_TAG_module
17107 || last_die
->tag
== DW_TAG_enumeration_type
17108 || (cu
->language
== language_cplus
17109 && last_die
->tag
== DW_TAG_subprogram
17110 && (last_die
->name
== NULL
17111 || strchr (last_die
->name
, '<') == NULL
))
17112 || (cu
->language
!= language_c
17113 && (last_die
->tag
== DW_TAG_class_type
17114 || last_die
->tag
== DW_TAG_interface_type
17115 || last_die
->tag
== DW_TAG_structure_type
17116 || last_die
->tag
== DW_TAG_union_type
))
17117 || (cu
->language
== language_ada
17118 && (last_die
->tag
== DW_TAG_subprogram
17119 || last_die
->tag
== DW_TAG_lexical_block
))))
17122 parent_die
= last_die
;
17126 /* Otherwise we skip to the next sibling, if any. */
17127 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
17129 /* Back to the top, do it again. */
17133 /* Read a minimal amount of information into the minimal die structure. */
17135 static const gdb_byte
*
17136 read_partial_die (const struct die_reader_specs
*reader
,
17137 struct partial_die_info
*part_die
,
17138 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
17139 const gdb_byte
*info_ptr
)
17141 struct dwarf2_cu
*cu
= reader
->cu
;
17142 struct objfile
*objfile
= cu
->objfile
;
17143 const gdb_byte
*buffer
= reader
->buffer
;
17145 struct attribute attr
;
17146 int has_low_pc_attr
= 0;
17147 int has_high_pc_attr
= 0;
17148 int high_pc_relative
= 0;
17150 memset (part_die
, 0, sizeof (struct partial_die_info
));
17152 part_die
->sect_off
= (sect_offset
) (info_ptr
- buffer
);
17154 info_ptr
+= abbrev_len
;
17156 if (abbrev
== NULL
)
17159 part_die
->tag
= abbrev
->tag
;
17160 part_die
->has_children
= abbrev
->has_children
;
17162 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17164 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
17166 /* Store the data if it is of an attribute we want to keep in a
17167 partial symbol table. */
17171 switch (part_die
->tag
)
17173 case DW_TAG_compile_unit
:
17174 case DW_TAG_partial_unit
:
17175 case DW_TAG_type_unit
:
17176 /* Compilation units have a DW_AT_name that is a filename, not
17177 a source language identifier. */
17178 case DW_TAG_enumeration_type
:
17179 case DW_TAG_enumerator
:
17180 /* These tags always have simple identifiers already; no need
17181 to canonicalize them. */
17182 part_die
->name
= DW_STRING (&attr
);
17186 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
17187 &objfile
->per_bfd
->storage_obstack
);
17191 case DW_AT_linkage_name
:
17192 case DW_AT_MIPS_linkage_name
:
17193 /* Note that both forms of linkage name might appear. We
17194 assume they will be the same, and we only store the last
17196 if (cu
->language
== language_ada
)
17197 part_die
->name
= DW_STRING (&attr
);
17198 part_die
->linkage_name
= DW_STRING (&attr
);
17201 has_low_pc_attr
= 1;
17202 part_die
->lowpc
= attr_value_as_address (&attr
);
17204 case DW_AT_high_pc
:
17205 has_high_pc_attr
= 1;
17206 part_die
->highpc
= attr_value_as_address (&attr
);
17207 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
17208 high_pc_relative
= 1;
17210 case DW_AT_location
:
17211 /* Support the .debug_loc offsets. */
17212 if (attr_form_is_block (&attr
))
17214 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
17216 else if (attr_form_is_section_offset (&attr
))
17218 dwarf2_complex_location_expr_complaint ();
17222 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17223 "partial symbol information");
17226 case DW_AT_external
:
17227 part_die
->is_external
= DW_UNSND (&attr
);
17229 case DW_AT_declaration
:
17230 part_die
->is_declaration
= DW_UNSND (&attr
);
17233 part_die
->has_type
= 1;
17235 case DW_AT_abstract_origin
:
17236 case DW_AT_specification
:
17237 case DW_AT_extension
:
17238 part_die
->has_specification
= 1;
17239 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
17240 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
17241 || cu
->per_cu
->is_dwz
);
17243 case DW_AT_sibling
:
17244 /* Ignore absolute siblings, they might point outside of
17245 the current compile unit. */
17246 if (attr
.form
== DW_FORM_ref_addr
)
17247 complaint (&symfile_complaints
,
17248 _("ignoring absolute DW_AT_sibling"));
17251 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
17252 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
17254 if (sibling_ptr
< info_ptr
)
17255 complaint (&symfile_complaints
,
17256 _("DW_AT_sibling points backwards"));
17257 else if (sibling_ptr
> reader
->buffer_end
)
17258 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
17260 part_die
->sibling
= sibling_ptr
;
17263 case DW_AT_byte_size
:
17264 part_die
->has_byte_size
= 1;
17266 case DW_AT_const_value
:
17267 part_die
->has_const_value
= 1;
17269 case DW_AT_calling_convention
:
17270 /* DWARF doesn't provide a way to identify a program's source-level
17271 entry point. DW_AT_calling_convention attributes are only meant
17272 to describe functions' calling conventions.
17274 However, because it's a necessary piece of information in
17275 Fortran, and before DWARF 4 DW_CC_program was the only
17276 piece of debugging information whose definition refers to
17277 a 'main program' at all, several compilers marked Fortran
17278 main programs with DW_CC_program --- even when those
17279 functions use the standard calling conventions.
17281 Although DWARF now specifies a way to provide this
17282 information, we support this practice for backward
17284 if (DW_UNSND (&attr
) == DW_CC_program
17285 && cu
->language
== language_fortran
)
17286 part_die
->main_subprogram
= 1;
17289 if (DW_UNSND (&attr
) == DW_INL_inlined
17290 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
17291 part_die
->may_be_inlined
= 1;
17295 if (part_die
->tag
== DW_TAG_imported_unit
)
17297 part_die
->d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
17298 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
17299 || cu
->per_cu
->is_dwz
);
17303 case DW_AT_main_subprogram
:
17304 part_die
->main_subprogram
= DW_UNSND (&attr
);
17312 if (high_pc_relative
)
17313 part_die
->highpc
+= part_die
->lowpc
;
17315 if (has_low_pc_attr
&& has_high_pc_attr
)
17317 /* When using the GNU linker, .gnu.linkonce. sections are used to
17318 eliminate duplicate copies of functions and vtables and such.
17319 The linker will arbitrarily choose one and discard the others.
17320 The AT_*_pc values for such functions refer to local labels in
17321 these sections. If the section from that file was discarded, the
17322 labels are not in the output, so the relocs get a value of 0.
17323 If this is a discarded function, mark the pc bounds as invalid,
17324 so that GDB will ignore it. */
17325 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
17327 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17329 complaint (&symfile_complaints
,
17330 _("DW_AT_low_pc %s is zero "
17331 "for DIE at 0x%x [in module %s]"),
17332 paddress (gdbarch
, part_die
->lowpc
),
17333 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
17335 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
17336 else if (part_die
->lowpc
>= part_die
->highpc
)
17338 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17340 complaint (&symfile_complaints
,
17341 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
17342 "for DIE at 0x%x [in module %s]"),
17343 paddress (gdbarch
, part_die
->lowpc
),
17344 paddress (gdbarch
, part_die
->highpc
),
17345 to_underlying (part_die
->sect_off
),
17346 objfile_name (objfile
));
17349 part_die
->has_pc_info
= 1;
17355 /* Find a cached partial DIE at OFFSET in CU. */
17357 static struct partial_die_info
*
17358 find_partial_die_in_comp_unit (sect_offset sect_off
, struct dwarf2_cu
*cu
)
17360 struct partial_die_info
*lookup_die
= NULL
;
17361 struct partial_die_info part_die
;
17363 part_die
.sect_off
= sect_off
;
17364 lookup_die
= ((struct partial_die_info
*)
17365 htab_find_with_hash (cu
->partial_dies
, &part_die
,
17366 to_underlying (sect_off
)));
17371 /* Find a partial DIE at OFFSET, which may or may not be in CU,
17372 except in the case of .debug_types DIEs which do not reference
17373 outside their CU (they do however referencing other types via
17374 DW_FORM_ref_sig8). */
17376 static struct partial_die_info
*
17377 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
17379 struct objfile
*objfile
= cu
->objfile
;
17380 struct dwarf2_per_cu_data
*per_cu
= NULL
;
17381 struct partial_die_info
*pd
= NULL
;
17383 if (offset_in_dwz
== cu
->per_cu
->is_dwz
17384 && offset_in_cu_p (&cu
->header
, sect_off
))
17386 pd
= find_partial_die_in_comp_unit (sect_off
, cu
);
17389 /* We missed recording what we needed.
17390 Load all dies and try again. */
17391 per_cu
= cu
->per_cu
;
17395 /* TUs don't reference other CUs/TUs (except via type signatures). */
17396 if (cu
->per_cu
->is_debug_types
)
17398 error (_("Dwarf Error: Type Unit at offset 0x%x contains"
17399 " external reference to offset 0x%x [in module %s].\n"),
17400 to_underlying (cu
->header
.sect_off
), to_underlying (sect_off
),
17401 bfd_get_filename (objfile
->obfd
));
17403 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
17406 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
17407 load_partial_comp_unit (per_cu
);
17409 per_cu
->cu
->last_used
= 0;
17410 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
17413 /* If we didn't find it, and not all dies have been loaded,
17414 load them all and try again. */
17416 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
17418 per_cu
->load_all_dies
= 1;
17420 /* This is nasty. When we reread the DIEs, somewhere up the call chain
17421 THIS_CU->cu may already be in use. So we can't just free it and
17422 replace its DIEs with the ones we read in. Instead, we leave those
17423 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
17424 and clobber THIS_CU->cu->partial_dies with the hash table for the new
17426 load_partial_comp_unit (per_cu
);
17428 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
17432 internal_error (__FILE__
, __LINE__
,
17433 _("could not find partial DIE 0x%x "
17434 "in cache [from module %s]\n"),
17435 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
17439 /* See if we can figure out if the class lives in a namespace. We do
17440 this by looking for a member function; its demangled name will
17441 contain namespace info, if there is any. */
17444 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
17445 struct dwarf2_cu
*cu
)
17447 /* NOTE: carlton/2003-10-07: Getting the info this way changes
17448 what template types look like, because the demangler
17449 frequently doesn't give the same name as the debug info. We
17450 could fix this by only using the demangled name to get the
17451 prefix (but see comment in read_structure_type). */
17453 struct partial_die_info
*real_pdi
;
17454 struct partial_die_info
*child_pdi
;
17456 /* If this DIE (this DIE's specification, if any) has a parent, then
17457 we should not do this. We'll prepend the parent's fully qualified
17458 name when we create the partial symbol. */
17460 real_pdi
= struct_pdi
;
17461 while (real_pdi
->has_specification
)
17462 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
17463 real_pdi
->spec_is_dwz
, cu
);
17465 if (real_pdi
->die_parent
!= NULL
)
17468 for (child_pdi
= struct_pdi
->die_child
;
17470 child_pdi
= child_pdi
->die_sibling
)
17472 if (child_pdi
->tag
== DW_TAG_subprogram
17473 && child_pdi
->linkage_name
!= NULL
)
17475 char *actual_class_name
17476 = language_class_name_from_physname (cu
->language_defn
,
17477 child_pdi
->linkage_name
);
17478 if (actual_class_name
!= NULL
)
17482 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
17484 strlen (actual_class_name
)));
17485 xfree (actual_class_name
);
17492 /* Adjust PART_DIE before generating a symbol for it. This function
17493 may set the is_external flag or change the DIE's name. */
17496 fixup_partial_die (struct partial_die_info
*part_die
,
17497 struct dwarf2_cu
*cu
)
17499 /* Once we've fixed up a die, there's no point in doing so again.
17500 This also avoids a memory leak if we were to call
17501 guess_partial_die_structure_name multiple times. */
17502 if (part_die
->fixup_called
)
17505 /* If we found a reference attribute and the DIE has no name, try
17506 to find a name in the referred to DIE. */
17508 if (part_die
->name
== NULL
&& part_die
->has_specification
)
17510 struct partial_die_info
*spec_die
;
17512 spec_die
= find_partial_die (part_die
->spec_offset
,
17513 part_die
->spec_is_dwz
, cu
);
17515 fixup_partial_die (spec_die
, cu
);
17517 if (spec_die
->name
)
17519 part_die
->name
= spec_die
->name
;
17521 /* Copy DW_AT_external attribute if it is set. */
17522 if (spec_die
->is_external
)
17523 part_die
->is_external
= spec_die
->is_external
;
17527 /* Set default names for some unnamed DIEs. */
17529 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
17530 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
17532 /* If there is no parent die to provide a namespace, and there are
17533 children, see if we can determine the namespace from their linkage
17535 if (cu
->language
== language_cplus
17536 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
17537 && part_die
->die_parent
== NULL
17538 && part_die
->has_children
17539 && (part_die
->tag
== DW_TAG_class_type
17540 || part_die
->tag
== DW_TAG_structure_type
17541 || part_die
->tag
== DW_TAG_union_type
))
17542 guess_partial_die_structure_name (part_die
, cu
);
17544 /* GCC might emit a nameless struct or union that has a linkage
17545 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
17546 if (part_die
->name
== NULL
17547 && (part_die
->tag
== DW_TAG_class_type
17548 || part_die
->tag
== DW_TAG_interface_type
17549 || part_die
->tag
== DW_TAG_structure_type
17550 || part_die
->tag
== DW_TAG_union_type
)
17551 && part_die
->linkage_name
!= NULL
)
17555 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
17560 /* Strip any leading namespaces/classes, keep only the base name.
17561 DW_AT_name for named DIEs does not contain the prefixes. */
17562 base
= strrchr (demangled
, ':');
17563 if (base
&& base
> demangled
&& base
[-1] == ':')
17570 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
17571 base
, strlen (base
)));
17576 part_die
->fixup_called
= 1;
17579 /* Read an attribute value described by an attribute form. */
17581 static const gdb_byte
*
17582 read_attribute_value (const struct die_reader_specs
*reader
,
17583 struct attribute
*attr
, unsigned form
,
17584 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
17586 struct dwarf2_cu
*cu
= reader
->cu
;
17587 struct objfile
*objfile
= cu
->objfile
;
17588 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17589 bfd
*abfd
= reader
->abfd
;
17590 struct comp_unit_head
*cu_header
= &cu
->header
;
17591 unsigned int bytes_read
;
17592 struct dwarf_block
*blk
;
17594 attr
->form
= (enum dwarf_form
) form
;
17597 case DW_FORM_ref_addr
:
17598 if (cu
->header
.version
== 2)
17599 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
17601 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
17602 &cu
->header
, &bytes_read
);
17603 info_ptr
+= bytes_read
;
17605 case DW_FORM_GNU_ref_alt
:
17606 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
17607 info_ptr
+= bytes_read
;
17610 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
17611 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
17612 info_ptr
+= bytes_read
;
17614 case DW_FORM_block2
:
17615 blk
= dwarf_alloc_block (cu
);
17616 blk
->size
= read_2_bytes (abfd
, info_ptr
);
17618 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17619 info_ptr
+= blk
->size
;
17620 DW_BLOCK (attr
) = blk
;
17622 case DW_FORM_block4
:
17623 blk
= dwarf_alloc_block (cu
);
17624 blk
->size
= read_4_bytes (abfd
, info_ptr
);
17626 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17627 info_ptr
+= blk
->size
;
17628 DW_BLOCK (attr
) = blk
;
17630 case DW_FORM_data2
:
17631 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
17634 case DW_FORM_data4
:
17635 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
17638 case DW_FORM_data8
:
17639 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
17642 case DW_FORM_data16
:
17643 blk
= dwarf_alloc_block (cu
);
17645 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
17647 DW_BLOCK (attr
) = blk
;
17649 case DW_FORM_sec_offset
:
17650 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
17651 info_ptr
+= bytes_read
;
17653 case DW_FORM_string
:
17654 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
17655 DW_STRING_IS_CANONICAL (attr
) = 0;
17656 info_ptr
+= bytes_read
;
17659 if (!cu
->per_cu
->is_dwz
)
17661 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
17663 DW_STRING_IS_CANONICAL (attr
) = 0;
17664 info_ptr
+= bytes_read
;
17668 case DW_FORM_line_strp
:
17669 if (!cu
->per_cu
->is_dwz
)
17671 DW_STRING (attr
) = read_indirect_line_string (abfd
, info_ptr
,
17672 cu_header
, &bytes_read
);
17673 DW_STRING_IS_CANONICAL (attr
) = 0;
17674 info_ptr
+= bytes_read
;
17678 case DW_FORM_GNU_strp_alt
:
17680 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17681 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
17684 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
17685 DW_STRING_IS_CANONICAL (attr
) = 0;
17686 info_ptr
+= bytes_read
;
17689 case DW_FORM_exprloc
:
17690 case DW_FORM_block
:
17691 blk
= dwarf_alloc_block (cu
);
17692 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17693 info_ptr
+= bytes_read
;
17694 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17695 info_ptr
+= blk
->size
;
17696 DW_BLOCK (attr
) = blk
;
17698 case DW_FORM_block1
:
17699 blk
= dwarf_alloc_block (cu
);
17700 blk
->size
= read_1_byte (abfd
, info_ptr
);
17702 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17703 info_ptr
+= blk
->size
;
17704 DW_BLOCK (attr
) = blk
;
17706 case DW_FORM_data1
:
17707 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
17711 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
17714 case DW_FORM_flag_present
:
17715 DW_UNSND (attr
) = 1;
17717 case DW_FORM_sdata
:
17718 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
17719 info_ptr
+= bytes_read
;
17721 case DW_FORM_udata
:
17722 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17723 info_ptr
+= bytes_read
;
17726 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17727 + read_1_byte (abfd
, info_ptr
));
17731 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17732 + read_2_bytes (abfd
, info_ptr
));
17736 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17737 + read_4_bytes (abfd
, info_ptr
));
17741 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17742 + read_8_bytes (abfd
, info_ptr
));
17745 case DW_FORM_ref_sig8
:
17746 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
17749 case DW_FORM_ref_udata
:
17750 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17751 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
17752 info_ptr
+= bytes_read
;
17754 case DW_FORM_indirect
:
17755 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17756 info_ptr
+= bytes_read
;
17757 if (form
== DW_FORM_implicit_const
)
17759 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
17760 info_ptr
+= bytes_read
;
17762 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
17765 case DW_FORM_implicit_const
:
17766 DW_SND (attr
) = implicit_const
;
17768 case DW_FORM_GNU_addr_index
:
17769 if (reader
->dwo_file
== NULL
)
17771 /* For now flag a hard error.
17772 Later we can turn this into a complaint. */
17773 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
17774 dwarf_form_name (form
),
17775 bfd_get_filename (abfd
));
17777 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
17778 info_ptr
+= bytes_read
;
17780 case DW_FORM_GNU_str_index
:
17781 if (reader
->dwo_file
== NULL
)
17783 /* For now flag a hard error.
17784 Later we can turn this into a complaint if warranted. */
17785 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
17786 dwarf_form_name (form
),
17787 bfd_get_filename (abfd
));
17790 ULONGEST str_index
=
17791 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17793 DW_STRING (attr
) = read_str_index (reader
, str_index
);
17794 DW_STRING_IS_CANONICAL (attr
) = 0;
17795 info_ptr
+= bytes_read
;
17799 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
17800 dwarf_form_name (form
),
17801 bfd_get_filename (abfd
));
17805 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
17806 attr
->form
= DW_FORM_GNU_ref_alt
;
17808 /* We have seen instances where the compiler tried to emit a byte
17809 size attribute of -1 which ended up being encoded as an unsigned
17810 0xffffffff. Although 0xffffffff is technically a valid size value,
17811 an object of this size seems pretty unlikely so we can relatively
17812 safely treat these cases as if the size attribute was invalid and
17813 treat them as zero by default. */
17814 if (attr
->name
== DW_AT_byte_size
17815 && form
== DW_FORM_data4
17816 && DW_UNSND (attr
) >= 0xffffffff)
17819 (&symfile_complaints
,
17820 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
17821 hex_string (DW_UNSND (attr
)));
17822 DW_UNSND (attr
) = 0;
17828 /* Read an attribute described by an abbreviated attribute. */
17830 static const gdb_byte
*
17831 read_attribute (const struct die_reader_specs
*reader
,
17832 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
17833 const gdb_byte
*info_ptr
)
17835 attr
->name
= abbrev
->name
;
17836 return read_attribute_value (reader
, attr
, abbrev
->form
,
17837 abbrev
->implicit_const
, info_ptr
);
17840 /* Read dwarf information from a buffer. */
17842 static unsigned int
17843 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
17845 return bfd_get_8 (abfd
, buf
);
17849 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
17851 return bfd_get_signed_8 (abfd
, buf
);
17854 static unsigned int
17855 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17857 return bfd_get_16 (abfd
, buf
);
17861 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17863 return bfd_get_signed_16 (abfd
, buf
);
17866 static unsigned int
17867 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17869 return bfd_get_32 (abfd
, buf
);
17873 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17875 return bfd_get_signed_32 (abfd
, buf
);
17879 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17881 return bfd_get_64 (abfd
, buf
);
17885 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
17886 unsigned int *bytes_read
)
17888 struct comp_unit_head
*cu_header
= &cu
->header
;
17889 CORE_ADDR retval
= 0;
17891 if (cu_header
->signed_addr_p
)
17893 switch (cu_header
->addr_size
)
17896 retval
= bfd_get_signed_16 (abfd
, buf
);
17899 retval
= bfd_get_signed_32 (abfd
, buf
);
17902 retval
= bfd_get_signed_64 (abfd
, buf
);
17905 internal_error (__FILE__
, __LINE__
,
17906 _("read_address: bad switch, signed [in module %s]"),
17907 bfd_get_filename (abfd
));
17912 switch (cu_header
->addr_size
)
17915 retval
= bfd_get_16 (abfd
, buf
);
17918 retval
= bfd_get_32 (abfd
, buf
);
17921 retval
= bfd_get_64 (abfd
, buf
);
17924 internal_error (__FILE__
, __LINE__
,
17925 _("read_address: bad switch, "
17926 "unsigned [in module %s]"),
17927 bfd_get_filename (abfd
));
17931 *bytes_read
= cu_header
->addr_size
;
17935 /* Read the initial length from a section. The (draft) DWARF 3
17936 specification allows the initial length to take up either 4 bytes
17937 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
17938 bytes describe the length and all offsets will be 8 bytes in length
17941 An older, non-standard 64-bit format is also handled by this
17942 function. The older format in question stores the initial length
17943 as an 8-byte quantity without an escape value. Lengths greater
17944 than 2^32 aren't very common which means that the initial 4 bytes
17945 is almost always zero. Since a length value of zero doesn't make
17946 sense for the 32-bit format, this initial zero can be considered to
17947 be an escape value which indicates the presence of the older 64-bit
17948 format. As written, the code can't detect (old format) lengths
17949 greater than 4GB. If it becomes necessary to handle lengths
17950 somewhat larger than 4GB, we could allow other small values (such
17951 as the non-sensical values of 1, 2, and 3) to also be used as
17952 escape values indicating the presence of the old format.
17954 The value returned via bytes_read should be used to increment the
17955 relevant pointer after calling read_initial_length().
17957 [ Note: read_initial_length() and read_offset() are based on the
17958 document entitled "DWARF Debugging Information Format", revision
17959 3, draft 8, dated November 19, 2001. This document was obtained
17962 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
17964 This document is only a draft and is subject to change. (So beware.)
17966 Details regarding the older, non-standard 64-bit format were
17967 determined empirically by examining 64-bit ELF files produced by
17968 the SGI toolchain on an IRIX 6.5 machine.
17970 - Kevin, July 16, 2002
17974 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
17976 LONGEST length
= bfd_get_32 (abfd
, buf
);
17978 if (length
== 0xffffffff)
17980 length
= bfd_get_64 (abfd
, buf
+ 4);
17983 else if (length
== 0)
17985 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
17986 length
= bfd_get_64 (abfd
, buf
);
17997 /* Cover function for read_initial_length.
17998 Returns the length of the object at BUF, and stores the size of the
17999 initial length in *BYTES_READ and stores the size that offsets will be in
18001 If the initial length size is not equivalent to that specified in
18002 CU_HEADER then issue a complaint.
18003 This is useful when reading non-comp-unit headers. */
18006 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
18007 const struct comp_unit_head
*cu_header
,
18008 unsigned int *bytes_read
,
18009 unsigned int *offset_size
)
18011 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
18013 gdb_assert (cu_header
->initial_length_size
== 4
18014 || cu_header
->initial_length_size
== 8
18015 || cu_header
->initial_length_size
== 12);
18017 if (cu_header
->initial_length_size
!= *bytes_read
)
18018 complaint (&symfile_complaints
,
18019 _("intermixed 32-bit and 64-bit DWARF sections"));
18021 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
18025 /* Read an offset from the data stream. The size of the offset is
18026 given by cu_header->offset_size. */
18029 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
18030 const struct comp_unit_head
*cu_header
,
18031 unsigned int *bytes_read
)
18033 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
18035 *bytes_read
= cu_header
->offset_size
;
18039 /* Read an offset from the data stream. */
18042 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
18044 LONGEST retval
= 0;
18046 switch (offset_size
)
18049 retval
= bfd_get_32 (abfd
, buf
);
18052 retval
= bfd_get_64 (abfd
, buf
);
18055 internal_error (__FILE__
, __LINE__
,
18056 _("read_offset_1: bad switch [in module %s]"),
18057 bfd_get_filename (abfd
));
18063 static const gdb_byte
*
18064 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
18066 /* If the size of a host char is 8 bits, we can return a pointer
18067 to the buffer, otherwise we have to copy the data to a buffer
18068 allocated on the temporary obstack. */
18069 gdb_assert (HOST_CHAR_BIT
== 8);
18073 static const char *
18074 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
18075 unsigned int *bytes_read_ptr
)
18077 /* If the size of a host char is 8 bits, we can return a pointer
18078 to the string, otherwise we have to copy the string to a buffer
18079 allocated on the temporary obstack. */
18080 gdb_assert (HOST_CHAR_BIT
== 8);
18083 *bytes_read_ptr
= 1;
18086 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
18087 return (const char *) buf
;
18090 /* Return pointer to string at section SECT offset STR_OFFSET with error
18091 reporting strings FORM_NAME and SECT_NAME. */
18093 static const char *
18094 read_indirect_string_at_offset_from (bfd
*abfd
, LONGEST str_offset
,
18095 struct dwarf2_section_info
*sect
,
18096 const char *form_name
,
18097 const char *sect_name
)
18099 dwarf2_read_section (dwarf2_per_objfile
->objfile
, sect
);
18100 if (sect
->buffer
== NULL
)
18101 error (_("%s used without %s section [in module %s]"),
18102 form_name
, sect_name
, bfd_get_filename (abfd
));
18103 if (str_offset
>= sect
->size
)
18104 error (_("%s pointing outside of %s section [in module %s]"),
18105 form_name
, sect_name
, bfd_get_filename (abfd
));
18106 gdb_assert (HOST_CHAR_BIT
== 8);
18107 if (sect
->buffer
[str_offset
] == '\0')
18109 return (const char *) (sect
->buffer
+ str_offset
);
18112 /* Return pointer to string at .debug_str offset STR_OFFSET. */
18114 static const char *
18115 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
18117 return read_indirect_string_at_offset_from (abfd
, str_offset
,
18118 &dwarf2_per_objfile
->str
,
18119 "DW_FORM_strp", ".debug_str");
18122 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
18124 static const char *
18125 read_indirect_line_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
18127 return read_indirect_string_at_offset_from (abfd
, str_offset
,
18128 &dwarf2_per_objfile
->line_str
,
18129 "DW_FORM_line_strp",
18130 ".debug_line_str");
18133 /* Read a string at offset STR_OFFSET in the .debug_str section from
18134 the .dwz file DWZ. Throw an error if the offset is too large. If
18135 the string consists of a single NUL byte, return NULL; otherwise
18136 return a pointer to the string. */
18138 static const char *
18139 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
18141 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
18143 if (dwz
->str
.buffer
== NULL
)
18144 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
18145 "section [in module %s]"),
18146 bfd_get_filename (dwz
->dwz_bfd
));
18147 if (str_offset
>= dwz
->str
.size
)
18148 error (_("DW_FORM_GNU_strp_alt pointing outside of "
18149 ".debug_str section [in module %s]"),
18150 bfd_get_filename (dwz
->dwz_bfd
));
18151 gdb_assert (HOST_CHAR_BIT
== 8);
18152 if (dwz
->str
.buffer
[str_offset
] == '\0')
18154 return (const char *) (dwz
->str
.buffer
+ str_offset
);
18157 /* Return pointer to string at .debug_str offset as read from BUF.
18158 BUF is assumed to be in a compilation unit described by CU_HEADER.
18159 Return *BYTES_READ_PTR count of bytes read from BUF. */
18161 static const char *
18162 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
18163 const struct comp_unit_head
*cu_header
,
18164 unsigned int *bytes_read_ptr
)
18166 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
18168 return read_indirect_string_at_offset (abfd
, str_offset
);
18171 /* Return pointer to string at .debug_line_str offset as read from BUF.
18172 BUF is assumed to be in a compilation unit described by CU_HEADER.
18173 Return *BYTES_READ_PTR count of bytes read from BUF. */
18175 static const char *
18176 read_indirect_line_string (bfd
*abfd
, const gdb_byte
*buf
,
18177 const struct comp_unit_head
*cu_header
,
18178 unsigned int *bytes_read_ptr
)
18180 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
18182 return read_indirect_line_string_at_offset (abfd
, str_offset
);
18186 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
18187 unsigned int *bytes_read_ptr
)
18190 unsigned int num_read
;
18192 unsigned char byte
;
18199 byte
= bfd_get_8 (abfd
, buf
);
18202 result
|= ((ULONGEST
) (byte
& 127) << shift
);
18203 if ((byte
& 128) == 0)
18209 *bytes_read_ptr
= num_read
;
18214 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
18215 unsigned int *bytes_read_ptr
)
18218 int shift
, num_read
;
18219 unsigned char byte
;
18226 byte
= bfd_get_8 (abfd
, buf
);
18229 result
|= ((LONGEST
) (byte
& 127) << shift
);
18231 if ((byte
& 128) == 0)
18236 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
18237 result
|= -(((LONGEST
) 1) << shift
);
18238 *bytes_read_ptr
= num_read
;
18242 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
18243 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
18244 ADDR_SIZE is the size of addresses from the CU header. */
18247 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
18249 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18250 bfd
*abfd
= objfile
->obfd
;
18251 const gdb_byte
*info_ptr
;
18253 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
18254 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
18255 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
18256 objfile_name (objfile
));
18257 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
18258 error (_("DW_FORM_addr_index pointing outside of "
18259 ".debug_addr section [in module %s]"),
18260 objfile_name (objfile
));
18261 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
18262 + addr_base
+ addr_index
* addr_size
);
18263 if (addr_size
== 4)
18264 return bfd_get_32 (abfd
, info_ptr
);
18266 return bfd_get_64 (abfd
, info_ptr
);
18269 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
18272 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
18274 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
18277 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
18280 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
18281 unsigned int *bytes_read
)
18283 bfd
*abfd
= cu
->objfile
->obfd
;
18284 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
18286 return read_addr_index (cu
, addr_index
);
18289 /* Data structure to pass results from dwarf2_read_addr_index_reader
18290 back to dwarf2_read_addr_index. */
18292 struct dwarf2_read_addr_index_data
18294 ULONGEST addr_base
;
18298 /* die_reader_func for dwarf2_read_addr_index. */
18301 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
18302 const gdb_byte
*info_ptr
,
18303 struct die_info
*comp_unit_die
,
18307 struct dwarf2_cu
*cu
= reader
->cu
;
18308 struct dwarf2_read_addr_index_data
*aidata
=
18309 (struct dwarf2_read_addr_index_data
*) data
;
18311 aidata
->addr_base
= cu
->addr_base
;
18312 aidata
->addr_size
= cu
->header
.addr_size
;
18315 /* Given an index in .debug_addr, fetch the value.
18316 NOTE: This can be called during dwarf expression evaluation,
18317 long after the debug information has been read, and thus per_cu->cu
18318 may no longer exist. */
18321 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
18322 unsigned int addr_index
)
18324 struct objfile
*objfile
= per_cu
->objfile
;
18325 struct dwarf2_cu
*cu
= per_cu
->cu
;
18326 ULONGEST addr_base
;
18329 /* This is intended to be called from outside this file. */
18330 dw2_setup (objfile
);
18332 /* We need addr_base and addr_size.
18333 If we don't have PER_CU->cu, we have to get it.
18334 Nasty, but the alternative is storing the needed info in PER_CU,
18335 which at this point doesn't seem justified: it's not clear how frequently
18336 it would get used and it would increase the size of every PER_CU.
18337 Entry points like dwarf2_per_cu_addr_size do a similar thing
18338 so we're not in uncharted territory here.
18339 Alas we need to be a bit more complicated as addr_base is contained
18342 We don't need to read the entire CU(/TU).
18343 We just need the header and top level die.
18345 IWBN to use the aging mechanism to let us lazily later discard the CU.
18346 For now we skip this optimization. */
18350 addr_base
= cu
->addr_base
;
18351 addr_size
= cu
->header
.addr_size
;
18355 struct dwarf2_read_addr_index_data aidata
;
18357 /* Note: We can't use init_cutu_and_read_dies_simple here,
18358 we need addr_base. */
18359 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
18360 dwarf2_read_addr_index_reader
, &aidata
);
18361 addr_base
= aidata
.addr_base
;
18362 addr_size
= aidata
.addr_size
;
18365 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
18368 /* Given a DW_FORM_GNU_str_index, fetch the string.
18369 This is only used by the Fission support. */
18371 static const char *
18372 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
18374 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18375 const char *objf_name
= objfile_name (objfile
);
18376 bfd
*abfd
= objfile
->obfd
;
18377 struct dwarf2_cu
*cu
= reader
->cu
;
18378 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
18379 struct dwarf2_section_info
*str_offsets_section
=
18380 &reader
->dwo_file
->sections
.str_offsets
;
18381 const gdb_byte
*info_ptr
;
18382 ULONGEST str_offset
;
18383 static const char form_name
[] = "DW_FORM_GNU_str_index";
18385 dwarf2_read_section (objfile
, str_section
);
18386 dwarf2_read_section (objfile
, str_offsets_section
);
18387 if (str_section
->buffer
== NULL
)
18388 error (_("%s used without .debug_str.dwo section"
18389 " in CU at offset 0x%x [in module %s]"),
18390 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18391 if (str_offsets_section
->buffer
== NULL
)
18392 error (_("%s used without .debug_str_offsets.dwo section"
18393 " in CU at offset 0x%x [in module %s]"),
18394 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18395 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
18396 error (_("%s pointing outside of .debug_str_offsets.dwo"
18397 " section in CU at offset 0x%x [in module %s]"),
18398 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18399 info_ptr
= (str_offsets_section
->buffer
18400 + str_index
* cu
->header
.offset_size
);
18401 if (cu
->header
.offset_size
== 4)
18402 str_offset
= bfd_get_32 (abfd
, info_ptr
);
18404 str_offset
= bfd_get_64 (abfd
, info_ptr
);
18405 if (str_offset
>= str_section
->size
)
18406 error (_("Offset from %s pointing outside of"
18407 " .debug_str.dwo section in CU at offset 0x%x [in module %s]"),
18408 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18409 return (const char *) (str_section
->buffer
+ str_offset
);
18412 /* Return the length of an LEB128 number in BUF. */
18415 leb128_size (const gdb_byte
*buf
)
18417 const gdb_byte
*begin
= buf
;
18423 if ((byte
& 128) == 0)
18424 return buf
- begin
;
18429 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
18438 cu
->language
= language_c
;
18441 case DW_LANG_C_plus_plus
:
18442 case DW_LANG_C_plus_plus_11
:
18443 case DW_LANG_C_plus_plus_14
:
18444 cu
->language
= language_cplus
;
18447 cu
->language
= language_d
;
18449 case DW_LANG_Fortran77
:
18450 case DW_LANG_Fortran90
:
18451 case DW_LANG_Fortran95
:
18452 case DW_LANG_Fortran03
:
18453 case DW_LANG_Fortran08
:
18454 cu
->language
= language_fortran
;
18457 cu
->language
= language_go
;
18459 case DW_LANG_Mips_Assembler
:
18460 cu
->language
= language_asm
;
18462 case DW_LANG_Ada83
:
18463 case DW_LANG_Ada95
:
18464 cu
->language
= language_ada
;
18466 case DW_LANG_Modula2
:
18467 cu
->language
= language_m2
;
18469 case DW_LANG_Pascal83
:
18470 cu
->language
= language_pascal
;
18473 cu
->language
= language_objc
;
18476 case DW_LANG_Rust_old
:
18477 cu
->language
= language_rust
;
18479 case DW_LANG_Cobol74
:
18480 case DW_LANG_Cobol85
:
18482 cu
->language
= language_minimal
;
18485 cu
->language_defn
= language_def (cu
->language
);
18488 /* Return the named attribute or NULL if not there. */
18490 static struct attribute
*
18491 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
18496 struct attribute
*spec
= NULL
;
18498 for (i
= 0; i
< die
->num_attrs
; ++i
)
18500 if (die
->attrs
[i
].name
== name
)
18501 return &die
->attrs
[i
];
18502 if (die
->attrs
[i
].name
== DW_AT_specification
18503 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
18504 spec
= &die
->attrs
[i
];
18510 die
= follow_die_ref (die
, spec
, &cu
);
18516 /* Return the named attribute or NULL if not there,
18517 but do not follow DW_AT_specification, etc.
18518 This is for use in contexts where we're reading .debug_types dies.
18519 Following DW_AT_specification, DW_AT_abstract_origin will take us
18520 back up the chain, and we want to go down. */
18522 static struct attribute
*
18523 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
18527 for (i
= 0; i
< die
->num_attrs
; ++i
)
18528 if (die
->attrs
[i
].name
== name
)
18529 return &die
->attrs
[i
];
18534 /* Return the string associated with a string-typed attribute, or NULL if it
18535 is either not found or is of an incorrect type. */
18537 static const char *
18538 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
18540 struct attribute
*attr
;
18541 const char *str
= NULL
;
18543 attr
= dwarf2_attr (die
, name
, cu
);
18547 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
18548 || attr
->form
== DW_FORM_string
18549 || attr
->form
== DW_FORM_GNU_str_index
18550 || attr
->form
== DW_FORM_GNU_strp_alt
)
18551 str
= DW_STRING (attr
);
18553 complaint (&symfile_complaints
,
18554 _("string type expected for attribute %s for "
18555 "DIE at 0x%x in module %s"),
18556 dwarf_attr_name (name
), to_underlying (die
->sect_off
),
18557 objfile_name (cu
->objfile
));
18563 /* Return non-zero iff the attribute NAME is defined for the given DIE,
18564 and holds a non-zero value. This function should only be used for
18565 DW_FORM_flag or DW_FORM_flag_present attributes. */
18568 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
18570 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
18572 return (attr
&& DW_UNSND (attr
));
18576 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
18578 /* A DIE is a declaration if it has a DW_AT_declaration attribute
18579 which value is non-zero. However, we have to be careful with
18580 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
18581 (via dwarf2_flag_true_p) follows this attribute. So we may
18582 end up accidently finding a declaration attribute that belongs
18583 to a different DIE referenced by the specification attribute,
18584 even though the given DIE does not have a declaration attribute. */
18585 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
18586 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
18589 /* Return the die giving the specification for DIE, if there is
18590 one. *SPEC_CU is the CU containing DIE on input, and the CU
18591 containing the return value on output. If there is no
18592 specification, but there is an abstract origin, that is
18595 static struct die_info
*
18596 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
18598 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
18601 if (spec_attr
== NULL
)
18602 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
18604 if (spec_attr
== NULL
)
18607 return follow_die_ref (die
, spec_attr
, spec_cu
);
18610 /* Stub for free_line_header to match void * callback types. */
18613 free_line_header_voidp (void *arg
)
18615 struct line_header
*lh
= (struct line_header
*) arg
;
18621 line_header::add_include_dir (const char *include_dir
)
18623 if (dwarf_line_debug
>= 2)
18624 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
18625 include_dirs
.size () + 1, include_dir
);
18627 include_dirs
.push_back (include_dir
);
18631 line_header::add_file_name (const char *name
,
18633 unsigned int mod_time
,
18634 unsigned int length
)
18636 if (dwarf_line_debug
>= 2)
18637 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
18638 (unsigned) file_names
.size () + 1, name
);
18640 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
18643 /* A convenience function to find the proper .debug_line section for a CU. */
18645 static struct dwarf2_section_info
*
18646 get_debug_line_section (struct dwarf2_cu
*cu
)
18648 struct dwarf2_section_info
*section
;
18650 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
18652 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18653 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
18654 else if (cu
->per_cu
->is_dwz
)
18656 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18658 section
= &dwz
->line
;
18661 section
= &dwarf2_per_objfile
->line
;
18666 /* Read directory or file name entry format, starting with byte of
18667 format count entries, ULEB128 pairs of entry formats, ULEB128 of
18668 entries count and the entries themselves in the described entry
18672 read_formatted_entries (bfd
*abfd
, const gdb_byte
**bufp
,
18673 struct line_header
*lh
,
18674 const struct comp_unit_head
*cu_header
,
18675 void (*callback
) (struct line_header
*lh
,
18678 unsigned int mod_time
,
18679 unsigned int length
))
18681 gdb_byte format_count
, formati
;
18682 ULONGEST data_count
, datai
;
18683 const gdb_byte
*buf
= *bufp
;
18684 const gdb_byte
*format_header_data
;
18686 unsigned int bytes_read
;
18688 format_count
= read_1_byte (abfd
, buf
);
18690 format_header_data
= buf
;
18691 for (formati
= 0; formati
< format_count
; formati
++)
18693 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18695 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18699 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18701 for (datai
= 0; datai
< data_count
; datai
++)
18703 const gdb_byte
*format
= format_header_data
;
18704 struct file_entry fe
;
18706 for (formati
= 0; formati
< format_count
; formati
++)
18708 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
18709 format
+= bytes_read
;
18711 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
18712 format
+= bytes_read
;
18714 gdb::optional
<const char *> string
;
18715 gdb::optional
<unsigned int> uint
;
18719 case DW_FORM_string
:
18720 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
18724 case DW_FORM_line_strp
:
18725 string
.emplace (read_indirect_line_string (abfd
, buf
,
18731 case DW_FORM_data1
:
18732 uint
.emplace (read_1_byte (abfd
, buf
));
18736 case DW_FORM_data2
:
18737 uint
.emplace (read_2_bytes (abfd
, buf
));
18741 case DW_FORM_data4
:
18742 uint
.emplace (read_4_bytes (abfd
, buf
));
18746 case DW_FORM_data8
:
18747 uint
.emplace (read_8_bytes (abfd
, buf
));
18751 case DW_FORM_udata
:
18752 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
18756 case DW_FORM_block
:
18757 /* It is valid only for DW_LNCT_timestamp which is ignored by
18762 switch (content_type
)
18765 if (string
.has_value ())
18768 case DW_LNCT_directory_index
:
18769 if (uint
.has_value ())
18770 fe
.d_index
= (dir_index
) *uint
;
18772 case DW_LNCT_timestamp
:
18773 if (uint
.has_value ())
18774 fe
.mod_time
= *uint
;
18777 if (uint
.has_value ())
18783 complaint (&symfile_complaints
,
18784 _("Unknown format content type %s"),
18785 pulongest (content_type
));
18789 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
18795 /* Read the statement program header starting at OFFSET in
18796 .debug_line, or .debug_line.dwo. Return a pointer
18797 to a struct line_header, allocated using xmalloc.
18798 Returns NULL if there is a problem reading the header, e.g., if it
18799 has a version we don't understand.
18801 NOTE: the strings in the include directory and file name tables of
18802 the returned object point into the dwarf line section buffer,
18803 and must not be freed. */
18805 static line_header_up
18806 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
18808 const gdb_byte
*line_ptr
;
18809 unsigned int bytes_read
, offset_size
;
18811 const char *cur_dir
, *cur_file
;
18812 struct dwarf2_section_info
*section
;
18815 section
= get_debug_line_section (cu
);
18816 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18817 if (section
->buffer
== NULL
)
18819 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18820 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
18822 complaint (&symfile_complaints
, _("missing .debug_line section"));
18826 /* We can't do this until we know the section is non-empty.
18827 Only then do we know we have such a section. */
18828 abfd
= get_section_bfd_owner (section
);
18830 /* Make sure that at least there's room for the total_length field.
18831 That could be 12 bytes long, but we're just going to fudge that. */
18832 if (to_underlying (sect_off
) + 4 >= section
->size
)
18834 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18838 line_header_up
lh (new line_header ());
18840 lh
->sect_off
= sect_off
;
18841 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
18843 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
18845 /* Read in the header. */
18847 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
18848 &bytes_read
, &offset_size
);
18849 line_ptr
+= bytes_read
;
18850 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
18852 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18855 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
18856 lh
->version
= read_2_bytes (abfd
, line_ptr
);
18858 if (lh
->version
> 5)
18860 /* This is a version we don't understand. The format could have
18861 changed in ways we don't handle properly so just punt. */
18862 complaint (&symfile_complaints
,
18863 _("unsupported version in .debug_line section"));
18866 if (lh
->version
>= 5)
18868 gdb_byte segment_selector_size
;
18870 /* Skip address size. */
18871 read_1_byte (abfd
, line_ptr
);
18874 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
18876 if (segment_selector_size
!= 0)
18878 complaint (&symfile_complaints
,
18879 _("unsupported segment selector size %u "
18880 "in .debug_line section"),
18881 segment_selector_size
);
18885 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
18886 line_ptr
+= offset_size
;
18887 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
18889 if (lh
->version
>= 4)
18891 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
18895 lh
->maximum_ops_per_instruction
= 1;
18897 if (lh
->maximum_ops_per_instruction
== 0)
18899 lh
->maximum_ops_per_instruction
= 1;
18900 complaint (&symfile_complaints
,
18901 _("invalid maximum_ops_per_instruction "
18902 "in `.debug_line' section"));
18905 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
18907 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
18909 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
18911 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
18913 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
18915 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
18916 for (i
= 1; i
< lh
->opcode_base
; ++i
)
18918 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
18922 if (lh
->version
>= 5)
18924 /* Read directory table. */
18925 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18926 [] (struct line_header
*lh
, const char *name
,
18927 dir_index d_index
, unsigned int mod_time
,
18928 unsigned int length
)
18930 lh
->add_include_dir (name
);
18933 /* Read file name table. */
18934 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18935 [] (struct line_header
*lh
, const char *name
,
18936 dir_index d_index
, unsigned int mod_time
,
18937 unsigned int length
)
18939 lh
->add_file_name (name
, d_index
, mod_time
, length
);
18944 /* Read directory table. */
18945 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18947 line_ptr
+= bytes_read
;
18948 lh
->add_include_dir (cur_dir
);
18950 line_ptr
+= bytes_read
;
18952 /* Read file name table. */
18953 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18955 unsigned int mod_time
, length
;
18958 line_ptr
+= bytes_read
;
18959 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18960 line_ptr
+= bytes_read
;
18961 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18962 line_ptr
+= bytes_read
;
18963 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18964 line_ptr
+= bytes_read
;
18966 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
18968 line_ptr
+= bytes_read
;
18970 lh
->statement_program_start
= line_ptr
;
18972 if (line_ptr
> (section
->buffer
+ section
->size
))
18973 complaint (&symfile_complaints
,
18974 _("line number info header doesn't "
18975 "fit in `.debug_line' section"));
18980 /* Subroutine of dwarf_decode_lines to simplify it.
18981 Return the file name of the psymtab for included file FILE_INDEX
18982 in line header LH of PST.
18983 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18984 If space for the result is malloc'd, it will be freed by a cleanup.
18985 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
18987 The function creates dangling cleanup registration. */
18989 static const char *
18990 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
18991 const struct partial_symtab
*pst
,
18992 const char *comp_dir
)
18994 const file_entry
&fe
= lh
->file_names
[file_index
];
18995 const char *include_name
= fe
.name
;
18996 const char *include_name_to_compare
= include_name
;
18997 const char *pst_filename
;
18998 char *copied_name
= NULL
;
19001 const char *dir_name
= fe
.include_dir (lh
);
19003 if (!IS_ABSOLUTE_PATH (include_name
)
19004 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19006 /* Avoid creating a duplicate psymtab for PST.
19007 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19008 Before we do the comparison, however, we need to account
19009 for DIR_NAME and COMP_DIR.
19010 First prepend dir_name (if non-NULL). If we still don't
19011 have an absolute path prepend comp_dir (if non-NULL).
19012 However, the directory we record in the include-file's
19013 psymtab does not contain COMP_DIR (to match the
19014 corresponding symtab(s)).
19019 bash$ gcc -g ./hello.c
19020 include_name = "hello.c"
19022 DW_AT_comp_dir = comp_dir = "/tmp"
19023 DW_AT_name = "./hello.c"
19027 if (dir_name
!= NULL
)
19029 char *tem
= concat (dir_name
, SLASH_STRING
,
19030 include_name
, (char *)NULL
);
19032 make_cleanup (xfree
, tem
);
19033 include_name
= tem
;
19034 include_name_to_compare
= include_name
;
19036 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19038 char *tem
= concat (comp_dir
, SLASH_STRING
,
19039 include_name
, (char *)NULL
);
19041 make_cleanup (xfree
, tem
);
19042 include_name_to_compare
= tem
;
19046 pst_filename
= pst
->filename
;
19047 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19049 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
19050 pst_filename
, (char *)NULL
);
19051 pst_filename
= copied_name
;
19054 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19056 if (copied_name
!= NULL
)
19057 xfree (copied_name
);
19061 return include_name
;
19064 /* State machine to track the state of the line number program. */
19066 class lnp_state_machine
19069 /* Initialize a machine state for the start of a line number
19071 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
19073 file_entry
*current_file ()
19075 /* lh->file_names is 0-based, but the file name numbers in the
19076 statement program are 1-based. */
19077 return m_line_header
->file_name_at (m_file
);
19080 /* Record the line in the state machine. END_SEQUENCE is true if
19081 we're processing the end of a sequence. */
19082 void record_line (bool end_sequence
);
19084 /* Check address and if invalid nop-out the rest of the lines in this
19086 void check_line_address (struct dwarf2_cu
*cu
,
19087 const gdb_byte
*line_ptr
,
19088 CORE_ADDR lowpc
, CORE_ADDR address
);
19090 void handle_set_discriminator (unsigned int discriminator
)
19092 m_discriminator
= discriminator
;
19093 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19096 /* Handle DW_LNE_set_address. */
19097 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19100 address
+= baseaddr
;
19101 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19104 /* Handle DW_LNS_advance_pc. */
19105 void handle_advance_pc (CORE_ADDR adjust
);
19107 /* Handle a special opcode. */
19108 void handle_special_opcode (unsigned char op_code
);
19110 /* Handle DW_LNS_advance_line. */
19111 void handle_advance_line (int line_delta
)
19113 advance_line (line_delta
);
19116 /* Handle DW_LNS_set_file. */
19117 void handle_set_file (file_name_index file
);
19119 /* Handle DW_LNS_negate_stmt. */
19120 void handle_negate_stmt ()
19122 m_is_stmt
= !m_is_stmt
;
19125 /* Handle DW_LNS_const_add_pc. */
19126 void handle_const_add_pc ();
19128 /* Handle DW_LNS_fixed_advance_pc. */
19129 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19131 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19135 /* Handle DW_LNS_copy. */
19136 void handle_copy ()
19138 record_line (false);
19139 m_discriminator
= 0;
19142 /* Handle DW_LNE_end_sequence. */
19143 void handle_end_sequence ()
19145 m_record_line_callback
= ::record_line
;
19149 /* Advance the line by LINE_DELTA. */
19150 void advance_line (int line_delta
)
19152 m_line
+= line_delta
;
19154 if (line_delta
!= 0)
19155 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19158 gdbarch
*m_gdbarch
;
19160 /* True if we're recording lines.
19161 Otherwise we're building partial symtabs and are just interested in
19162 finding include files mentioned by the line number program. */
19163 bool m_record_lines_p
;
19165 /* The line number header. */
19166 line_header
*m_line_header
;
19168 /* These are part of the standard DWARF line number state machine,
19169 and initialized according to the DWARF spec. */
19171 unsigned char m_op_index
= 0;
19172 /* The line table index (1-based) of the current file. */
19173 file_name_index m_file
= (file_name_index
) 1;
19174 unsigned int m_line
= 1;
19176 /* These are initialized in the constructor. */
19178 CORE_ADDR m_address
;
19180 unsigned int m_discriminator
;
19182 /* Additional bits of state we need to track. */
19184 /* The last file that we called dwarf2_start_subfile for.
19185 This is only used for TLLs. */
19186 unsigned int m_last_file
= 0;
19187 /* The last file a line number was recorded for. */
19188 struct subfile
*m_last_subfile
= NULL
;
19190 /* The function to call to record a line. */
19191 record_line_ftype
*m_record_line_callback
= NULL
;
19193 /* The last line number that was recorded, used to coalesce
19194 consecutive entries for the same line. This can happen, for
19195 example, when discriminators are present. PR 17276. */
19196 unsigned int m_last_line
= 0;
19197 bool m_line_has_non_zero_discriminator
= false;
19201 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19203 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19204 / m_line_header
->maximum_ops_per_instruction
)
19205 * m_line_header
->minimum_instruction_length
);
19206 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19207 m_op_index
= ((m_op_index
+ adjust
)
19208 % m_line_header
->maximum_ops_per_instruction
);
19212 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19214 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19215 CORE_ADDR addr_adj
= (((m_op_index
19216 + (adj_opcode
/ m_line_header
->line_range
))
19217 / m_line_header
->maximum_ops_per_instruction
)
19218 * m_line_header
->minimum_instruction_length
);
19219 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19220 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
19221 % m_line_header
->maximum_ops_per_instruction
);
19223 int line_delta
= (m_line_header
->line_base
19224 + (adj_opcode
% m_line_header
->line_range
));
19225 advance_line (line_delta
);
19226 record_line (false);
19227 m_discriminator
= 0;
19231 lnp_state_machine::handle_set_file (file_name_index file
)
19235 const file_entry
*fe
= current_file ();
19237 dwarf2_debug_line_missing_file_complaint ();
19238 else if (m_record_lines_p
)
19240 const char *dir
= fe
->include_dir (m_line_header
);
19242 m_last_subfile
= current_subfile
;
19243 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19244 dwarf2_start_subfile (fe
->name
, dir
);
19249 lnp_state_machine::handle_const_add_pc ()
19252 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19255 = (((m_op_index
+ adjust
)
19256 / m_line_header
->maximum_ops_per_instruction
)
19257 * m_line_header
->minimum_instruction_length
);
19259 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19260 m_op_index
= ((m_op_index
+ adjust
)
19261 % m_line_header
->maximum_ops_per_instruction
);
19264 /* Ignore this record_line request. */
19267 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
19272 /* Return non-zero if we should add LINE to the line number table.
19273 LINE is the line to add, LAST_LINE is the last line that was added,
19274 LAST_SUBFILE is the subfile for LAST_LINE.
19275 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19276 had a non-zero discriminator.
19278 We have to be careful in the presence of discriminators.
19279 E.g., for this line:
19281 for (i = 0; i < 100000; i++);
19283 clang can emit four line number entries for that one line,
19284 each with a different discriminator.
19285 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19287 However, we want gdb to coalesce all four entries into one.
19288 Otherwise the user could stepi into the middle of the line and
19289 gdb would get confused about whether the pc really was in the
19290 middle of the line.
19292 Things are further complicated by the fact that two consecutive
19293 line number entries for the same line is a heuristic used by gcc
19294 to denote the end of the prologue. So we can't just discard duplicate
19295 entries, we have to be selective about it. The heuristic we use is
19296 that we only collapse consecutive entries for the same line if at least
19297 one of those entries has a non-zero discriminator. PR 17276.
19299 Note: Addresses in the line number state machine can never go backwards
19300 within one sequence, thus this coalescing is ok. */
19303 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
19304 int line_has_non_zero_discriminator
,
19305 struct subfile
*last_subfile
)
19307 if (current_subfile
!= last_subfile
)
19309 if (line
!= last_line
)
19311 /* Same line for the same file that we've seen already.
19312 As a last check, for pr 17276, only record the line if the line
19313 has never had a non-zero discriminator. */
19314 if (!line_has_non_zero_discriminator
)
19319 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
19320 in the line table of subfile SUBFILE. */
19323 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19324 unsigned int line
, CORE_ADDR address
,
19325 record_line_ftype p_record_line
)
19327 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19329 if (dwarf_line_debug
)
19331 fprintf_unfiltered (gdb_stdlog
,
19332 "Recording line %u, file %s, address %s\n",
19333 line
, lbasename (subfile
->name
),
19334 paddress (gdbarch
, address
));
19337 (*p_record_line
) (subfile
, line
, addr
);
19340 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19341 Mark the end of a set of line number records.
19342 The arguments are the same as for dwarf_record_line_1.
19343 If SUBFILE is NULL the request is ignored. */
19346 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19347 CORE_ADDR address
, record_line_ftype p_record_line
)
19349 if (subfile
== NULL
)
19352 if (dwarf_line_debug
)
19354 fprintf_unfiltered (gdb_stdlog
,
19355 "Finishing current line, file %s, address %s\n",
19356 lbasename (subfile
->name
),
19357 paddress (gdbarch
, address
));
19360 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
19364 lnp_state_machine::record_line (bool end_sequence
)
19366 if (dwarf_line_debug
)
19368 fprintf_unfiltered (gdb_stdlog
,
19369 "Processing actual line %u: file %u,"
19370 " address %s, is_stmt %u, discrim %u\n",
19371 m_line
, to_underlying (m_file
),
19372 paddress (m_gdbarch
, m_address
),
19373 m_is_stmt
, m_discriminator
);
19376 file_entry
*fe
= current_file ();
19379 dwarf2_debug_line_missing_file_complaint ();
19380 /* For now we ignore lines not starting on an instruction boundary.
19381 But not when processing end_sequence for compatibility with the
19382 previous version of the code. */
19383 else if (m_op_index
== 0 || end_sequence
)
19385 fe
->included_p
= 1;
19386 if (m_record_lines_p
&& m_is_stmt
)
19388 if (m_last_subfile
!= current_subfile
|| end_sequence
)
19390 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
19391 m_address
, m_record_line_callback
);
19396 if (dwarf_record_line_p (m_line
, m_last_line
,
19397 m_line_has_non_zero_discriminator
,
19400 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
19402 m_record_line_callback
);
19404 m_last_subfile
= current_subfile
;
19405 m_last_line
= m_line
;
19411 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
19412 bool record_lines_p
)
19415 m_record_lines_p
= record_lines_p
;
19416 m_line_header
= lh
;
19418 m_record_line_callback
= ::record_line
;
19420 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
19421 was a line entry for it so that the backend has a chance to adjust it
19422 and also record it in case it needs it. This is currently used by MIPS
19423 code, cf. `mips_adjust_dwarf2_line'. */
19424 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
19425 m_is_stmt
= lh
->default_is_stmt
;
19426 m_discriminator
= 0;
19430 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
19431 const gdb_byte
*line_ptr
,
19432 CORE_ADDR lowpc
, CORE_ADDR address
)
19434 /* If address < lowpc then it's not a usable value, it's outside the
19435 pc range of the CU. However, we restrict the test to only address
19436 values of zero to preserve GDB's previous behaviour which is to
19437 handle the specific case of a function being GC'd by the linker. */
19439 if (address
== 0 && address
< lowpc
)
19441 /* This line table is for a function which has been
19442 GCd by the linker. Ignore it. PR gdb/12528 */
19444 struct objfile
*objfile
= cu
->objfile
;
19445 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
19447 complaint (&symfile_complaints
,
19448 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
19449 line_offset
, objfile_name (objfile
));
19450 m_record_line_callback
= noop_record_line
;
19451 /* Note: record_line_callback is left as noop_record_line until
19452 we see DW_LNE_end_sequence. */
19456 /* Subroutine of dwarf_decode_lines to simplify it.
19457 Process the line number information in LH.
19458 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
19459 program in order to set included_p for every referenced header. */
19462 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
19463 const int decode_for_pst_p
, CORE_ADDR lowpc
)
19465 const gdb_byte
*line_ptr
, *extended_end
;
19466 const gdb_byte
*line_end
;
19467 unsigned int bytes_read
, extended_len
;
19468 unsigned char op_code
, extended_op
;
19469 CORE_ADDR baseaddr
;
19470 struct objfile
*objfile
= cu
->objfile
;
19471 bfd
*abfd
= objfile
->obfd
;
19472 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19473 /* True if we're recording line info (as opposed to building partial
19474 symtabs and just interested in finding include files mentioned by
19475 the line number program). */
19476 bool record_lines_p
= !decode_for_pst_p
;
19478 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19480 line_ptr
= lh
->statement_program_start
;
19481 line_end
= lh
->statement_program_end
;
19483 /* Read the statement sequences until there's nothing left. */
19484 while (line_ptr
< line_end
)
19486 /* The DWARF line number program state machine. Reset the state
19487 machine at the start of each sequence. */
19488 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
19489 bool end_sequence
= false;
19491 if (record_lines_p
)
19493 /* Start a subfile for the current file of the state
19495 const file_entry
*fe
= state_machine
.current_file ();
19498 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
19501 /* Decode the table. */
19502 while (line_ptr
< line_end
&& !end_sequence
)
19504 op_code
= read_1_byte (abfd
, line_ptr
);
19507 if (op_code
>= lh
->opcode_base
)
19509 /* Special opcode. */
19510 state_machine
.handle_special_opcode (op_code
);
19512 else switch (op_code
)
19514 case DW_LNS_extended_op
:
19515 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
19517 line_ptr
+= bytes_read
;
19518 extended_end
= line_ptr
+ extended_len
;
19519 extended_op
= read_1_byte (abfd
, line_ptr
);
19521 switch (extended_op
)
19523 case DW_LNE_end_sequence
:
19524 state_machine
.handle_end_sequence ();
19525 end_sequence
= true;
19527 case DW_LNE_set_address
:
19530 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
19531 line_ptr
+= bytes_read
;
19533 state_machine
.check_line_address (cu
, line_ptr
,
19535 state_machine
.handle_set_address (baseaddr
, address
);
19538 case DW_LNE_define_file
:
19540 const char *cur_file
;
19541 unsigned int mod_time
, length
;
19544 cur_file
= read_direct_string (abfd
, line_ptr
,
19546 line_ptr
+= bytes_read
;
19547 dindex
= (dir_index
)
19548 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19549 line_ptr
+= bytes_read
;
19551 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19552 line_ptr
+= bytes_read
;
19554 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19555 line_ptr
+= bytes_read
;
19556 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
19559 case DW_LNE_set_discriminator
:
19561 /* The discriminator is not interesting to the
19562 debugger; just ignore it. We still need to
19563 check its value though:
19564 if there are consecutive entries for the same
19565 (non-prologue) line we want to coalesce them.
19568 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19569 line_ptr
+= bytes_read
;
19571 state_machine
.handle_set_discriminator (discr
);
19575 complaint (&symfile_complaints
,
19576 _("mangled .debug_line section"));
19579 /* Make sure that we parsed the extended op correctly. If e.g.
19580 we expected a different address size than the producer used,
19581 we may have read the wrong number of bytes. */
19582 if (line_ptr
!= extended_end
)
19584 complaint (&symfile_complaints
,
19585 _("mangled .debug_line section"));
19590 state_machine
.handle_copy ();
19592 case DW_LNS_advance_pc
:
19595 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19596 line_ptr
+= bytes_read
;
19598 state_machine
.handle_advance_pc (adjust
);
19601 case DW_LNS_advance_line
:
19604 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
19605 line_ptr
+= bytes_read
;
19607 state_machine
.handle_advance_line (line_delta
);
19610 case DW_LNS_set_file
:
19612 file_name_index file
19613 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
19615 line_ptr
+= bytes_read
;
19617 state_machine
.handle_set_file (file
);
19620 case DW_LNS_set_column
:
19621 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19622 line_ptr
+= bytes_read
;
19624 case DW_LNS_negate_stmt
:
19625 state_machine
.handle_negate_stmt ();
19627 case DW_LNS_set_basic_block
:
19629 /* Add to the address register of the state machine the
19630 address increment value corresponding to special opcode
19631 255. I.e., this value is scaled by the minimum
19632 instruction length since special opcode 255 would have
19633 scaled the increment. */
19634 case DW_LNS_const_add_pc
:
19635 state_machine
.handle_const_add_pc ();
19637 case DW_LNS_fixed_advance_pc
:
19639 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
19642 state_machine
.handle_fixed_advance_pc (addr_adj
);
19647 /* Unknown standard opcode, ignore it. */
19650 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
19652 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19653 line_ptr
+= bytes_read
;
19660 dwarf2_debug_line_missing_end_sequence_complaint ();
19662 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
19663 in which case we still finish recording the last line). */
19664 state_machine
.record_line (true);
19668 /* Decode the Line Number Program (LNP) for the given line_header
19669 structure and CU. The actual information extracted and the type
19670 of structures created from the LNP depends on the value of PST.
19672 1. If PST is NULL, then this procedure uses the data from the program
19673 to create all necessary symbol tables, and their linetables.
19675 2. If PST is not NULL, this procedure reads the program to determine
19676 the list of files included by the unit represented by PST, and
19677 builds all the associated partial symbol tables.
19679 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19680 It is used for relative paths in the line table.
19681 NOTE: When processing partial symtabs (pst != NULL),
19682 comp_dir == pst->dirname.
19684 NOTE: It is important that psymtabs have the same file name (via strcmp)
19685 as the corresponding symtab. Since COMP_DIR is not used in the name of the
19686 symtab we don't use it in the name of the psymtabs we create.
19687 E.g. expand_line_sal requires this when finding psymtabs to expand.
19688 A good testcase for this is mb-inline.exp.
19690 LOWPC is the lowest address in CU (or 0 if not known).
19692 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
19693 for its PC<->lines mapping information. Otherwise only the filename
19694 table is read in. */
19697 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
19698 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
19699 CORE_ADDR lowpc
, int decode_mapping
)
19701 struct objfile
*objfile
= cu
->objfile
;
19702 const int decode_for_pst_p
= (pst
!= NULL
);
19704 if (decode_mapping
)
19705 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
19707 if (decode_for_pst_p
)
19711 /* Now that we're done scanning the Line Header Program, we can
19712 create the psymtab of each included file. */
19713 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
19714 if (lh
->file_names
[file_index
].included_p
== 1)
19716 const char *include_name
=
19717 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
19718 if (include_name
!= NULL
)
19719 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
19724 /* Make sure a symtab is created for every file, even files
19725 which contain only variables (i.e. no code with associated
19727 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
19730 for (i
= 0; i
< lh
->file_names
.size (); i
++)
19732 file_entry
&fe
= lh
->file_names
[i
];
19734 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
19736 if (current_subfile
->symtab
== NULL
)
19738 current_subfile
->symtab
19739 = allocate_symtab (cust
, current_subfile
->name
);
19741 fe
.symtab
= current_subfile
->symtab
;
19746 /* Start a subfile for DWARF. FILENAME is the name of the file and
19747 DIRNAME the name of the source directory which contains FILENAME
19748 or NULL if not known.
19749 This routine tries to keep line numbers from identical absolute and
19750 relative file names in a common subfile.
19752 Using the `list' example from the GDB testsuite, which resides in
19753 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
19754 of /srcdir/list0.c yields the following debugging information for list0.c:
19756 DW_AT_name: /srcdir/list0.c
19757 DW_AT_comp_dir: /compdir
19758 files.files[0].name: list0.h
19759 files.files[0].dir: /srcdir
19760 files.files[1].name: list0.c
19761 files.files[1].dir: /srcdir
19763 The line number information for list0.c has to end up in a single
19764 subfile, so that `break /srcdir/list0.c:1' works as expected.
19765 start_subfile will ensure that this happens provided that we pass the
19766 concatenation of files.files[1].dir and files.files[1].name as the
19770 dwarf2_start_subfile (const char *filename
, const char *dirname
)
19774 /* In order not to lose the line information directory,
19775 we concatenate it to the filename when it makes sense.
19776 Note that the Dwarf3 standard says (speaking of filenames in line
19777 information): ``The directory index is ignored for file names
19778 that represent full path names''. Thus ignoring dirname in the
19779 `else' branch below isn't an issue. */
19781 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
19783 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
19787 start_subfile (filename
);
19793 /* Start a symtab for DWARF.
19794 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
19796 static struct compunit_symtab
*
19797 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
19798 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
19800 struct compunit_symtab
*cust
19801 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
, cu
->language
);
19803 record_debugformat ("DWARF 2");
19804 record_producer (cu
->producer
);
19806 /* We assume that we're processing GCC output. */
19807 processing_gcc_compilation
= 2;
19809 cu
->processing_has_namespace_info
= 0;
19815 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
19816 struct dwarf2_cu
*cu
)
19818 struct objfile
*objfile
= cu
->objfile
;
19819 struct comp_unit_head
*cu_header
= &cu
->header
;
19821 /* NOTE drow/2003-01-30: There used to be a comment and some special
19822 code here to turn a symbol with DW_AT_external and a
19823 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
19824 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
19825 with some versions of binutils) where shared libraries could have
19826 relocations against symbols in their debug information - the
19827 minimal symbol would have the right address, but the debug info
19828 would not. It's no longer necessary, because we will explicitly
19829 apply relocations when we read in the debug information now. */
19831 /* A DW_AT_location attribute with no contents indicates that a
19832 variable has been optimized away. */
19833 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
19835 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19839 /* Handle one degenerate form of location expression specially, to
19840 preserve GDB's previous behavior when section offsets are
19841 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
19842 then mark this symbol as LOC_STATIC. */
19844 if (attr_form_is_block (attr
)
19845 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
19846 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
19847 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
19848 && (DW_BLOCK (attr
)->size
19849 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
19851 unsigned int dummy
;
19853 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
19854 SYMBOL_VALUE_ADDRESS (sym
) =
19855 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
19857 SYMBOL_VALUE_ADDRESS (sym
) =
19858 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
19859 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
19860 fixup_symbol_section (sym
, objfile
);
19861 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
19862 SYMBOL_SECTION (sym
));
19866 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
19867 expression evaluator, and use LOC_COMPUTED only when necessary
19868 (i.e. when the value of a register or memory location is
19869 referenced, or a thread-local block, etc.). Then again, it might
19870 not be worthwhile. I'm assuming that it isn't unless performance
19871 or memory numbers show me otherwise. */
19873 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
19875 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
19876 cu
->has_loclist
= 1;
19879 /* Given a pointer to a DWARF information entry, figure out if we need
19880 to make a symbol table entry for it, and if so, create a new entry
19881 and return a pointer to it.
19882 If TYPE is NULL, determine symbol type from the die, otherwise
19883 used the passed type.
19884 If SPACE is not NULL, use it to hold the new symbol. If it is
19885 NULL, allocate a new symbol on the objfile's obstack. */
19887 static struct symbol
*
19888 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
19889 struct symbol
*space
)
19891 struct objfile
*objfile
= cu
->objfile
;
19892 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19893 struct symbol
*sym
= NULL
;
19895 struct attribute
*attr
= NULL
;
19896 struct attribute
*attr2
= NULL
;
19897 CORE_ADDR baseaddr
;
19898 struct pending
**list_to_add
= NULL
;
19900 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
19902 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19904 name
= dwarf2_name (die
, cu
);
19907 const char *linkagename
;
19908 int suppress_add
= 0;
19913 sym
= allocate_symbol (objfile
);
19914 OBJSTAT (objfile
, n_syms
++);
19916 /* Cache this symbol's name and the name's demangled form (if any). */
19917 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
19918 linkagename
= dwarf2_physname (name
, die
, cu
);
19919 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
19921 /* Fortran does not have mangling standard and the mangling does differ
19922 between gfortran, iFort etc. */
19923 if (cu
->language
== language_fortran
19924 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
19925 symbol_set_demangled_name (&(sym
->ginfo
),
19926 dwarf2_full_name (name
, die
, cu
),
19929 /* Default assumptions.
19930 Use the passed type or decode it from the die. */
19931 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19932 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19934 SYMBOL_TYPE (sym
) = type
;
19936 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
19937 attr
= dwarf2_attr (die
,
19938 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
19942 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
19945 attr
= dwarf2_attr (die
,
19946 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
19950 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
19951 struct file_entry
*fe
;
19953 if (cu
->line_header
!= NULL
)
19954 fe
= cu
->line_header
->file_name_at (file_index
);
19959 complaint (&symfile_complaints
,
19960 _("file index out of range"));
19962 symbol_set_symtab (sym
, fe
->symtab
);
19968 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
19973 addr
= attr_value_as_address (attr
);
19974 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
19975 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
19977 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
19978 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
19979 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
19980 add_symbol_to_list (sym
, cu
->list_in_scope
);
19982 case DW_TAG_subprogram
:
19983 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19985 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19986 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19987 if ((attr2
&& (DW_UNSND (attr2
) != 0))
19988 || cu
->language
== language_ada
)
19990 /* Subprograms marked external are stored as a global symbol.
19991 Ada subprograms, whether marked external or not, are always
19992 stored as a global symbol, because we want to be able to
19993 access them globally. For instance, we want to be able
19994 to break on a nested subprogram without having to
19995 specify the context. */
19996 list_to_add
= &global_symbols
;
20000 list_to_add
= cu
->list_in_scope
;
20003 case DW_TAG_inlined_subroutine
:
20004 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20006 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20007 SYMBOL_INLINED (sym
) = 1;
20008 list_to_add
= cu
->list_in_scope
;
20010 case DW_TAG_template_value_param
:
20012 /* Fall through. */
20013 case DW_TAG_constant
:
20014 case DW_TAG_variable
:
20015 case DW_TAG_member
:
20016 /* Compilation with minimal debug info may result in
20017 variables with missing type entries. Change the
20018 misleading `void' type to something sensible. */
20019 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20020 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20022 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20023 /* In the case of DW_TAG_member, we should only be called for
20024 static const members. */
20025 if (die
->tag
== DW_TAG_member
)
20027 /* dwarf2_add_field uses die_is_declaration,
20028 so we do the same. */
20029 gdb_assert (die_is_declaration (die
, cu
));
20034 dwarf2_const_value (attr
, sym
, cu
);
20035 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20038 if (attr2
&& (DW_UNSND (attr2
) != 0))
20039 list_to_add
= &global_symbols
;
20041 list_to_add
= cu
->list_in_scope
;
20045 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20048 var_decode_location (attr
, sym
, cu
);
20049 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20051 /* Fortran explicitly imports any global symbols to the local
20052 scope by DW_TAG_common_block. */
20053 if (cu
->language
== language_fortran
&& die
->parent
20054 && die
->parent
->tag
== DW_TAG_common_block
)
20057 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20058 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20059 && !dwarf2_per_objfile
->has_section_at_zero
)
20061 /* When a static variable is eliminated by the linker,
20062 the corresponding debug information is not stripped
20063 out, but the variable address is set to null;
20064 do not add such variables into symbol table. */
20066 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20068 /* Workaround gfortran PR debug/40040 - it uses
20069 DW_AT_location for variables in -fPIC libraries which may
20070 get overriden by other libraries/executable and get
20071 a different address. Resolve it by the minimal symbol
20072 which may come from inferior's executable using copy
20073 relocation. Make this workaround only for gfortran as for
20074 other compilers GDB cannot guess the minimal symbol
20075 Fortran mangling kind. */
20076 if (cu
->language
== language_fortran
&& die
->parent
20077 && die
->parent
->tag
== DW_TAG_module
20079 && startswith (cu
->producer
, "GNU Fortran"))
20080 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20082 /* A variable with DW_AT_external is never static,
20083 but it may be block-scoped. */
20084 list_to_add
= (cu
->list_in_scope
== &file_symbols
20085 ? &global_symbols
: cu
->list_in_scope
);
20088 list_to_add
= cu
->list_in_scope
;
20092 /* We do not know the address of this symbol.
20093 If it is an external symbol and we have type information
20094 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20095 The address of the variable will then be determined from
20096 the minimal symbol table whenever the variable is
20098 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20100 /* Fortran explicitly imports any global symbols to the local
20101 scope by DW_TAG_common_block. */
20102 if (cu
->language
== language_fortran
&& die
->parent
20103 && die
->parent
->tag
== DW_TAG_common_block
)
20105 /* SYMBOL_CLASS doesn't matter here because
20106 read_common_block is going to reset it. */
20108 list_to_add
= cu
->list_in_scope
;
20110 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20111 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20113 /* A variable with DW_AT_external is never static, but it
20114 may be block-scoped. */
20115 list_to_add
= (cu
->list_in_scope
== &file_symbols
20116 ? &global_symbols
: cu
->list_in_scope
);
20118 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20120 else if (!die_is_declaration (die
, cu
))
20122 /* Use the default LOC_OPTIMIZED_OUT class. */
20123 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20125 list_to_add
= cu
->list_in_scope
;
20129 case DW_TAG_formal_parameter
:
20130 /* If we are inside a function, mark this as an argument. If
20131 not, we might be looking at an argument to an inlined function
20132 when we do not have enough information to show inlined frames;
20133 pretend it's a local variable in that case so that the user can
20135 if (context_stack_depth
> 0
20136 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
20137 SYMBOL_IS_ARGUMENT (sym
) = 1;
20138 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20141 var_decode_location (attr
, sym
, cu
);
20143 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20146 dwarf2_const_value (attr
, sym
, cu
);
20149 list_to_add
= cu
->list_in_scope
;
20151 case DW_TAG_unspecified_parameters
:
20152 /* From varargs functions; gdb doesn't seem to have any
20153 interest in this information, so just ignore it for now.
20156 case DW_TAG_template_type_param
:
20158 /* Fall through. */
20159 case DW_TAG_class_type
:
20160 case DW_TAG_interface_type
:
20161 case DW_TAG_structure_type
:
20162 case DW_TAG_union_type
:
20163 case DW_TAG_set_type
:
20164 case DW_TAG_enumeration_type
:
20165 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20166 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20169 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20170 really ever be static objects: otherwise, if you try
20171 to, say, break of a class's method and you're in a file
20172 which doesn't mention that class, it won't work unless
20173 the check for all static symbols in lookup_symbol_aux
20174 saves you. See the OtherFileClass tests in
20175 gdb.c++/namespace.exp. */
20179 list_to_add
= (cu
->list_in_scope
== &file_symbols
20180 && cu
->language
== language_cplus
20181 ? &global_symbols
: cu
->list_in_scope
);
20183 /* The semantics of C++ state that "struct foo {
20184 ... }" also defines a typedef for "foo". */
20185 if (cu
->language
== language_cplus
20186 || cu
->language
== language_ada
20187 || cu
->language
== language_d
20188 || cu
->language
== language_rust
)
20190 /* The symbol's name is already allocated along
20191 with this objfile, so we don't need to
20192 duplicate it for the type. */
20193 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20194 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
20199 case DW_TAG_typedef
:
20200 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20201 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20202 list_to_add
= cu
->list_in_scope
;
20204 case DW_TAG_base_type
:
20205 case DW_TAG_subrange_type
:
20206 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20207 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20208 list_to_add
= cu
->list_in_scope
;
20210 case DW_TAG_enumerator
:
20211 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20214 dwarf2_const_value (attr
, sym
, cu
);
20217 /* NOTE: carlton/2003-11-10: See comment above in the
20218 DW_TAG_class_type, etc. block. */
20220 list_to_add
= (cu
->list_in_scope
== &file_symbols
20221 && cu
->language
== language_cplus
20222 ? &global_symbols
: cu
->list_in_scope
);
20225 case DW_TAG_imported_declaration
:
20226 case DW_TAG_namespace
:
20227 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20228 list_to_add
= &global_symbols
;
20230 case DW_TAG_module
:
20231 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20232 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20233 list_to_add
= &global_symbols
;
20235 case DW_TAG_common_block
:
20236 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20237 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20238 add_symbol_to_list (sym
, cu
->list_in_scope
);
20241 /* Not a tag we recognize. Hopefully we aren't processing
20242 trash data, but since we must specifically ignore things
20243 we don't recognize, there is nothing else we should do at
20245 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
20246 dwarf_tag_name (die
->tag
));
20252 sym
->hash_next
= objfile
->template_symbols
;
20253 objfile
->template_symbols
= sym
;
20254 list_to_add
= NULL
;
20257 if (list_to_add
!= NULL
)
20258 add_symbol_to_list (sym
, list_to_add
);
20260 /* For the benefit of old versions of GCC, check for anonymous
20261 namespaces based on the demangled name. */
20262 if (!cu
->processing_has_namespace_info
20263 && cu
->language
== language_cplus
)
20264 cp_scan_for_anonymous_namespaces (sym
, objfile
);
20269 /* A wrapper for new_symbol_full that always allocates a new symbol. */
20271 static struct symbol
*
20272 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
20274 return new_symbol_full (die
, type
, cu
, NULL
);
20277 /* Given an attr with a DW_FORM_dataN value in host byte order,
20278 zero-extend it as appropriate for the symbol's type. The DWARF
20279 standard (v4) is not entirely clear about the meaning of using
20280 DW_FORM_dataN for a constant with a signed type, where the type is
20281 wider than the data. The conclusion of a discussion on the DWARF
20282 list was that this is unspecified. We choose to always zero-extend
20283 because that is the interpretation long in use by GCC. */
20286 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20287 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20289 struct objfile
*objfile
= cu
->objfile
;
20290 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20291 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20292 LONGEST l
= DW_UNSND (attr
);
20294 if (bits
< sizeof (*value
) * 8)
20296 l
&= ((LONGEST
) 1 << bits
) - 1;
20299 else if (bits
== sizeof (*value
) * 8)
20303 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20304 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20311 /* Read a constant value from an attribute. Either set *VALUE, or if
20312 the value does not fit in *VALUE, set *BYTES - either already
20313 allocated on the objfile obstack, or newly allocated on OBSTACK,
20314 or, set *BATON, if we translated the constant to a location
20318 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20319 const char *name
, struct obstack
*obstack
,
20320 struct dwarf2_cu
*cu
,
20321 LONGEST
*value
, const gdb_byte
**bytes
,
20322 struct dwarf2_locexpr_baton
**baton
)
20324 struct objfile
*objfile
= cu
->objfile
;
20325 struct comp_unit_head
*cu_header
= &cu
->header
;
20326 struct dwarf_block
*blk
;
20327 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20328 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20334 switch (attr
->form
)
20337 case DW_FORM_GNU_addr_index
:
20341 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
20342 dwarf2_const_value_length_mismatch_complaint (name
,
20343 cu_header
->addr_size
,
20344 TYPE_LENGTH (type
));
20345 /* Symbols of this form are reasonably rare, so we just
20346 piggyback on the existing location code rather than writing
20347 a new implementation of symbol_computed_ops. */
20348 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
20349 (*baton
)->per_cu
= cu
->per_cu
;
20350 gdb_assert ((*baton
)->per_cu
);
20352 (*baton
)->size
= 2 + cu_header
->addr_size
;
20353 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
20354 (*baton
)->data
= data
;
20356 data
[0] = DW_OP_addr
;
20357 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
20358 byte_order
, DW_ADDR (attr
));
20359 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
20362 case DW_FORM_string
:
20364 case DW_FORM_GNU_str_index
:
20365 case DW_FORM_GNU_strp_alt
:
20366 /* DW_STRING is already allocated on the objfile obstack, point
20368 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
20370 case DW_FORM_block1
:
20371 case DW_FORM_block2
:
20372 case DW_FORM_block4
:
20373 case DW_FORM_block
:
20374 case DW_FORM_exprloc
:
20375 case DW_FORM_data16
:
20376 blk
= DW_BLOCK (attr
);
20377 if (TYPE_LENGTH (type
) != blk
->size
)
20378 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
20379 TYPE_LENGTH (type
));
20380 *bytes
= blk
->data
;
20383 /* The DW_AT_const_value attributes are supposed to carry the
20384 symbol's value "represented as it would be on the target
20385 architecture." By the time we get here, it's already been
20386 converted to host endianness, so we just need to sign- or
20387 zero-extend it as appropriate. */
20388 case DW_FORM_data1
:
20389 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
20391 case DW_FORM_data2
:
20392 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
20394 case DW_FORM_data4
:
20395 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
20397 case DW_FORM_data8
:
20398 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
20401 case DW_FORM_sdata
:
20402 case DW_FORM_implicit_const
:
20403 *value
= DW_SND (attr
);
20406 case DW_FORM_udata
:
20407 *value
= DW_UNSND (attr
);
20411 complaint (&symfile_complaints
,
20412 _("unsupported const value attribute form: '%s'"),
20413 dwarf_form_name (attr
->form
));
20420 /* Copy constant value from an attribute to a symbol. */
20423 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
20424 struct dwarf2_cu
*cu
)
20426 struct objfile
*objfile
= cu
->objfile
;
20428 const gdb_byte
*bytes
;
20429 struct dwarf2_locexpr_baton
*baton
;
20431 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
20432 SYMBOL_PRINT_NAME (sym
),
20433 &objfile
->objfile_obstack
, cu
,
20434 &value
, &bytes
, &baton
);
20438 SYMBOL_LOCATION_BATON (sym
) = baton
;
20439 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
20441 else if (bytes
!= NULL
)
20443 SYMBOL_VALUE_BYTES (sym
) = bytes
;
20444 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
20448 SYMBOL_VALUE (sym
) = value
;
20449 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
20453 /* Return the type of the die in question using its DW_AT_type attribute. */
20455 static struct type
*
20456 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20458 struct attribute
*type_attr
;
20460 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
20463 /* A missing DW_AT_type represents a void type. */
20464 return objfile_type (cu
->objfile
)->builtin_void
;
20467 return lookup_die_type (die
, type_attr
, cu
);
20470 /* True iff CU's producer generates GNAT Ada auxiliary information
20471 that allows to find parallel types through that information instead
20472 of having to do expensive parallel lookups by type name. */
20475 need_gnat_info (struct dwarf2_cu
*cu
)
20477 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
20478 of GNAT produces this auxiliary information, without any indication
20479 that it is produced. Part of enhancing the FSF version of GNAT
20480 to produce that information will be to put in place an indicator
20481 that we can use in order to determine whether the descriptive type
20482 info is available or not. One suggestion that has been made is
20483 to use a new attribute, attached to the CU die. For now, assume
20484 that the descriptive type info is not available. */
20488 /* Return the auxiliary type of the die in question using its
20489 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
20490 attribute is not present. */
20492 static struct type
*
20493 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20495 struct attribute
*type_attr
;
20497 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
20501 return lookup_die_type (die
, type_attr
, cu
);
20504 /* If DIE has a descriptive_type attribute, then set the TYPE's
20505 descriptive type accordingly. */
20508 set_descriptive_type (struct type
*type
, struct die_info
*die
,
20509 struct dwarf2_cu
*cu
)
20511 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
20513 if (descriptive_type
)
20515 ALLOCATE_GNAT_AUX_TYPE (type
);
20516 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
20520 /* Return the containing type of the die in question using its
20521 DW_AT_containing_type attribute. */
20523 static struct type
*
20524 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20526 struct attribute
*type_attr
;
20528 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
20530 error (_("Dwarf Error: Problem turning containing type into gdb type "
20531 "[in module %s]"), objfile_name (cu
->objfile
));
20533 return lookup_die_type (die
, type_attr
, cu
);
20536 /* Return an error marker type to use for the ill formed type in DIE/CU. */
20538 static struct type
*
20539 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
20541 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20542 char *message
, *saved
;
20544 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
20545 objfile_name (objfile
),
20546 to_underlying (cu
->header
.sect_off
),
20547 to_underlying (die
->sect_off
));
20548 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
20549 message
, strlen (message
));
20552 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
20555 /* Look up the type of DIE in CU using its type attribute ATTR.
20556 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
20557 DW_AT_containing_type.
20558 If there is no type substitute an error marker. */
20560 static struct type
*
20561 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
20562 struct dwarf2_cu
*cu
)
20564 struct objfile
*objfile
= cu
->objfile
;
20565 struct type
*this_type
;
20567 gdb_assert (attr
->name
== DW_AT_type
20568 || attr
->name
== DW_AT_GNAT_descriptive_type
20569 || attr
->name
== DW_AT_containing_type
);
20571 /* First see if we have it cached. */
20573 if (attr
->form
== DW_FORM_GNU_ref_alt
)
20575 struct dwarf2_per_cu_data
*per_cu
;
20576 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20578 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, cu
->objfile
);
20579 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
20581 else if (attr_form_is_ref (attr
))
20583 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20585 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
20587 else if (attr
->form
== DW_FORM_ref_sig8
)
20589 ULONGEST signature
= DW_SIGNATURE (attr
);
20591 return get_signatured_type (die
, signature
, cu
);
20595 complaint (&symfile_complaints
,
20596 _("Dwarf Error: Bad type attribute %s in DIE"
20597 " at 0x%x [in module %s]"),
20598 dwarf_attr_name (attr
->name
), to_underlying (die
->sect_off
),
20599 objfile_name (objfile
));
20600 return build_error_marker_type (cu
, die
);
20603 /* If not cached we need to read it in. */
20605 if (this_type
== NULL
)
20607 struct die_info
*type_die
= NULL
;
20608 struct dwarf2_cu
*type_cu
= cu
;
20610 if (attr_form_is_ref (attr
))
20611 type_die
= follow_die_ref (die
, attr
, &type_cu
);
20612 if (type_die
== NULL
)
20613 return build_error_marker_type (cu
, die
);
20614 /* If we find the type now, it's probably because the type came
20615 from an inter-CU reference and the type's CU got expanded before
20617 this_type
= read_type_die (type_die
, type_cu
);
20620 /* If we still don't have a type use an error marker. */
20622 if (this_type
== NULL
)
20623 return build_error_marker_type (cu
, die
);
20628 /* Return the type in DIE, CU.
20629 Returns NULL for invalid types.
20631 This first does a lookup in die_type_hash,
20632 and only reads the die in if necessary.
20634 NOTE: This can be called when reading in partial or full symbols. */
20636 static struct type
*
20637 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
20639 struct type
*this_type
;
20641 this_type
= get_die_type (die
, cu
);
20645 return read_type_die_1 (die
, cu
);
20648 /* Read the type in DIE, CU.
20649 Returns NULL for invalid types. */
20651 static struct type
*
20652 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
20654 struct type
*this_type
= NULL
;
20658 case DW_TAG_class_type
:
20659 case DW_TAG_interface_type
:
20660 case DW_TAG_structure_type
:
20661 case DW_TAG_union_type
:
20662 this_type
= read_structure_type (die
, cu
);
20664 case DW_TAG_enumeration_type
:
20665 this_type
= read_enumeration_type (die
, cu
);
20667 case DW_TAG_subprogram
:
20668 case DW_TAG_subroutine_type
:
20669 case DW_TAG_inlined_subroutine
:
20670 this_type
= read_subroutine_type (die
, cu
);
20672 case DW_TAG_array_type
:
20673 this_type
= read_array_type (die
, cu
);
20675 case DW_TAG_set_type
:
20676 this_type
= read_set_type (die
, cu
);
20678 case DW_TAG_pointer_type
:
20679 this_type
= read_tag_pointer_type (die
, cu
);
20681 case DW_TAG_ptr_to_member_type
:
20682 this_type
= read_tag_ptr_to_member_type (die
, cu
);
20684 case DW_TAG_reference_type
:
20685 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
20687 case DW_TAG_rvalue_reference_type
:
20688 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
20690 case DW_TAG_const_type
:
20691 this_type
= read_tag_const_type (die
, cu
);
20693 case DW_TAG_volatile_type
:
20694 this_type
= read_tag_volatile_type (die
, cu
);
20696 case DW_TAG_restrict_type
:
20697 this_type
= read_tag_restrict_type (die
, cu
);
20699 case DW_TAG_string_type
:
20700 this_type
= read_tag_string_type (die
, cu
);
20702 case DW_TAG_typedef
:
20703 this_type
= read_typedef (die
, cu
);
20705 case DW_TAG_subrange_type
:
20706 this_type
= read_subrange_type (die
, cu
);
20708 case DW_TAG_base_type
:
20709 this_type
= read_base_type (die
, cu
);
20711 case DW_TAG_unspecified_type
:
20712 this_type
= read_unspecified_type (die
, cu
);
20714 case DW_TAG_namespace
:
20715 this_type
= read_namespace_type (die
, cu
);
20717 case DW_TAG_module
:
20718 this_type
= read_module_type (die
, cu
);
20720 case DW_TAG_atomic_type
:
20721 this_type
= read_tag_atomic_type (die
, cu
);
20724 complaint (&symfile_complaints
,
20725 _("unexpected tag in read_type_die: '%s'"),
20726 dwarf_tag_name (die
->tag
));
20733 /* See if we can figure out if the class lives in a namespace. We do
20734 this by looking for a member function; its demangled name will
20735 contain namespace info, if there is any.
20736 Return the computed name or NULL.
20737 Space for the result is allocated on the objfile's obstack.
20738 This is the full-die version of guess_partial_die_structure_name.
20739 In this case we know DIE has no useful parent. */
20742 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20744 struct die_info
*spec_die
;
20745 struct dwarf2_cu
*spec_cu
;
20746 struct die_info
*child
;
20749 spec_die
= die_specification (die
, &spec_cu
);
20750 if (spec_die
!= NULL
)
20756 for (child
= die
->child
;
20758 child
= child
->sibling
)
20760 if (child
->tag
== DW_TAG_subprogram
)
20762 const char *linkage_name
= dw2_linkage_name (child
, cu
);
20764 if (linkage_name
!= NULL
)
20767 = language_class_name_from_physname (cu
->language_defn
,
20771 if (actual_name
!= NULL
)
20773 const char *die_name
= dwarf2_name (die
, cu
);
20775 if (die_name
!= NULL
20776 && strcmp (die_name
, actual_name
) != 0)
20778 /* Strip off the class name from the full name.
20779 We want the prefix. */
20780 int die_name_len
= strlen (die_name
);
20781 int actual_name_len
= strlen (actual_name
);
20783 /* Test for '::' as a sanity check. */
20784 if (actual_name_len
> die_name_len
+ 2
20785 && actual_name
[actual_name_len
20786 - die_name_len
- 1] == ':')
20787 name
= (char *) obstack_copy0 (
20788 &cu
->objfile
->per_bfd
->storage_obstack
,
20789 actual_name
, actual_name_len
- die_name_len
- 2);
20792 xfree (actual_name
);
20801 /* GCC might emit a nameless typedef that has a linkage name. Determine the
20802 prefix part in such case. See
20803 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20805 static const char *
20806 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20808 struct attribute
*attr
;
20811 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
20812 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
20815 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
20818 attr
= dw2_linkage_name_attr (die
, cu
);
20819 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20822 /* dwarf2_name had to be already called. */
20823 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
20825 /* Strip the base name, keep any leading namespaces/classes. */
20826 base
= strrchr (DW_STRING (attr
), ':');
20827 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
20830 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20832 &base
[-1] - DW_STRING (attr
));
20835 /* Return the name of the namespace/class that DIE is defined within,
20836 or "" if we can't tell. The caller should not xfree the result.
20838 For example, if we're within the method foo() in the following
20848 then determine_prefix on foo's die will return "N::C". */
20850 static const char *
20851 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20853 struct die_info
*parent
, *spec_die
;
20854 struct dwarf2_cu
*spec_cu
;
20855 struct type
*parent_type
;
20856 const char *retval
;
20858 if (cu
->language
!= language_cplus
20859 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
20860 && cu
->language
!= language_rust
)
20863 retval
= anonymous_struct_prefix (die
, cu
);
20867 /* We have to be careful in the presence of DW_AT_specification.
20868 For example, with GCC 3.4, given the code
20872 // Definition of N::foo.
20876 then we'll have a tree of DIEs like this:
20878 1: DW_TAG_compile_unit
20879 2: DW_TAG_namespace // N
20880 3: DW_TAG_subprogram // declaration of N::foo
20881 4: DW_TAG_subprogram // definition of N::foo
20882 DW_AT_specification // refers to die #3
20884 Thus, when processing die #4, we have to pretend that we're in
20885 the context of its DW_AT_specification, namely the contex of die
20888 spec_die
= die_specification (die
, &spec_cu
);
20889 if (spec_die
== NULL
)
20890 parent
= die
->parent
;
20893 parent
= spec_die
->parent
;
20897 if (parent
== NULL
)
20899 else if (parent
->building_fullname
)
20902 const char *parent_name
;
20904 /* It has been seen on RealView 2.2 built binaries,
20905 DW_TAG_template_type_param types actually _defined_ as
20906 children of the parent class:
20909 template class <class Enum> Class{};
20910 Class<enum E> class_e;
20912 1: DW_TAG_class_type (Class)
20913 2: DW_TAG_enumeration_type (E)
20914 3: DW_TAG_enumerator (enum1:0)
20915 3: DW_TAG_enumerator (enum2:1)
20917 2: DW_TAG_template_type_param
20918 DW_AT_type DW_FORM_ref_udata (E)
20920 Besides being broken debug info, it can put GDB into an
20921 infinite loop. Consider:
20923 When we're building the full name for Class<E>, we'll start
20924 at Class, and go look over its template type parameters,
20925 finding E. We'll then try to build the full name of E, and
20926 reach here. We're now trying to build the full name of E,
20927 and look over the parent DIE for containing scope. In the
20928 broken case, if we followed the parent DIE of E, we'd again
20929 find Class, and once again go look at its template type
20930 arguments, etc., etc. Simply don't consider such parent die
20931 as source-level parent of this die (it can't be, the language
20932 doesn't allow it), and break the loop here. */
20933 name
= dwarf2_name (die
, cu
);
20934 parent_name
= dwarf2_name (parent
, cu
);
20935 complaint (&symfile_complaints
,
20936 _("template param type '%s' defined within parent '%s'"),
20937 name
? name
: "<unknown>",
20938 parent_name
? parent_name
: "<unknown>");
20942 switch (parent
->tag
)
20944 case DW_TAG_namespace
:
20945 parent_type
= read_type_die (parent
, cu
);
20946 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
20947 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
20948 Work around this problem here. */
20949 if (cu
->language
== language_cplus
20950 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
20952 /* We give a name to even anonymous namespaces. */
20953 return TYPE_TAG_NAME (parent_type
);
20954 case DW_TAG_class_type
:
20955 case DW_TAG_interface_type
:
20956 case DW_TAG_structure_type
:
20957 case DW_TAG_union_type
:
20958 case DW_TAG_module
:
20959 parent_type
= read_type_die (parent
, cu
);
20960 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20961 return TYPE_TAG_NAME (parent_type
);
20963 /* An anonymous structure is only allowed non-static data
20964 members; no typedefs, no member functions, et cetera.
20965 So it does not need a prefix. */
20967 case DW_TAG_compile_unit
:
20968 case DW_TAG_partial_unit
:
20969 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
20970 if (cu
->language
== language_cplus
20971 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
20972 && die
->child
!= NULL
20973 && (die
->tag
== DW_TAG_class_type
20974 || die
->tag
== DW_TAG_structure_type
20975 || die
->tag
== DW_TAG_union_type
))
20977 char *name
= guess_full_die_structure_name (die
, cu
);
20982 case DW_TAG_enumeration_type
:
20983 parent_type
= read_type_die (parent
, cu
);
20984 if (TYPE_DECLARED_CLASS (parent_type
))
20986 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20987 return TYPE_TAG_NAME (parent_type
);
20990 /* Fall through. */
20992 return determine_prefix (parent
, cu
);
20996 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
20997 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
20998 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
20999 an obconcat, otherwise allocate storage for the result. The CU argument is
21000 used to determine the language and hence, the appropriate separator. */
21002 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21005 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21006 int physname
, struct dwarf2_cu
*cu
)
21008 const char *lead
= "";
21011 if (suffix
== NULL
|| suffix
[0] == '\0'
21012 || prefix
== NULL
|| prefix
[0] == '\0')
21014 else if (cu
->language
== language_d
)
21016 /* For D, the 'main' function could be defined in any module, but it
21017 should never be prefixed. */
21018 if (strcmp (suffix
, "D main") == 0)
21026 else if (cu
->language
== language_fortran
&& physname
)
21028 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21029 DW_AT_MIPS_linkage_name is preferred and used instead. */
21037 if (prefix
== NULL
)
21039 if (suffix
== NULL
)
21046 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21048 strcpy (retval
, lead
);
21049 strcat (retval
, prefix
);
21050 strcat (retval
, sep
);
21051 strcat (retval
, suffix
);
21056 /* We have an obstack. */
21057 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21061 /* Return sibling of die, NULL if no sibling. */
21063 static struct die_info
*
21064 sibling_die (struct die_info
*die
)
21066 return die
->sibling
;
21069 /* Get name of a die, return NULL if not found. */
21071 static const char *
21072 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21073 struct obstack
*obstack
)
21075 if (name
&& cu
->language
== language_cplus
)
21077 std::string canon_name
= cp_canonicalize_string (name
);
21079 if (!canon_name
.empty ())
21081 if (canon_name
!= name
)
21082 name
= (const char *) obstack_copy0 (obstack
,
21083 canon_name
.c_str (),
21084 canon_name
.length ());
21091 /* Get name of a die, return NULL if not found.
21092 Anonymous namespaces are converted to their magic string. */
21094 static const char *
21095 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21097 struct attribute
*attr
;
21099 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21100 if ((!attr
|| !DW_STRING (attr
))
21101 && die
->tag
!= DW_TAG_namespace
21102 && die
->tag
!= DW_TAG_class_type
21103 && die
->tag
!= DW_TAG_interface_type
21104 && die
->tag
!= DW_TAG_structure_type
21105 && die
->tag
!= DW_TAG_union_type
)
21110 case DW_TAG_compile_unit
:
21111 case DW_TAG_partial_unit
:
21112 /* Compilation units have a DW_AT_name that is a filename, not
21113 a source language identifier. */
21114 case DW_TAG_enumeration_type
:
21115 case DW_TAG_enumerator
:
21116 /* These tags always have simple identifiers already; no need
21117 to canonicalize them. */
21118 return DW_STRING (attr
);
21120 case DW_TAG_namespace
:
21121 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21122 return DW_STRING (attr
);
21123 return CP_ANONYMOUS_NAMESPACE_STR
;
21125 case DW_TAG_class_type
:
21126 case DW_TAG_interface_type
:
21127 case DW_TAG_structure_type
:
21128 case DW_TAG_union_type
:
21129 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21130 structures or unions. These were of the form "._%d" in GCC 4.1,
21131 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21132 and GCC 4.4. We work around this problem by ignoring these. */
21133 if (attr
&& DW_STRING (attr
)
21134 && (startswith (DW_STRING (attr
), "._")
21135 || startswith (DW_STRING (attr
), "<anonymous")))
21138 /* GCC might emit a nameless typedef that has a linkage name. See
21139 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21140 if (!attr
|| DW_STRING (attr
) == NULL
)
21142 char *demangled
= NULL
;
21144 attr
= dw2_linkage_name_attr (die
, cu
);
21145 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21148 /* Avoid demangling DW_STRING (attr) the second time on a second
21149 call for the same DIE. */
21150 if (!DW_STRING_IS_CANONICAL (attr
))
21151 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
21157 /* FIXME: we already did this for the partial symbol... */
21160 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
21161 demangled
, strlen (demangled
)));
21162 DW_STRING_IS_CANONICAL (attr
) = 1;
21165 /* Strip any leading namespaces/classes, keep only the base name.
21166 DW_AT_name for named DIEs does not contain the prefixes. */
21167 base
= strrchr (DW_STRING (attr
), ':');
21168 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21171 return DW_STRING (attr
);
21180 if (!DW_STRING_IS_CANONICAL (attr
))
21183 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21184 &cu
->objfile
->per_bfd
->storage_obstack
);
21185 DW_STRING_IS_CANONICAL (attr
) = 1;
21187 return DW_STRING (attr
);
21190 /* Return the die that this die in an extension of, or NULL if there
21191 is none. *EXT_CU is the CU containing DIE on input, and the CU
21192 containing the return value on output. */
21194 static struct die_info
*
21195 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21197 struct attribute
*attr
;
21199 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21203 return follow_die_ref (die
, attr
, ext_cu
);
21206 /* Convert a DIE tag into its string name. */
21208 static const char *
21209 dwarf_tag_name (unsigned tag
)
21211 const char *name
= get_DW_TAG_name (tag
);
21214 return "DW_TAG_<unknown>";
21219 /* Convert a DWARF attribute code into its string name. */
21221 static const char *
21222 dwarf_attr_name (unsigned attr
)
21226 #ifdef MIPS /* collides with DW_AT_HP_block_index */
21227 if (attr
== DW_AT_MIPS_fde
)
21228 return "DW_AT_MIPS_fde";
21230 if (attr
== DW_AT_HP_block_index
)
21231 return "DW_AT_HP_block_index";
21234 name
= get_DW_AT_name (attr
);
21237 return "DW_AT_<unknown>";
21242 /* Convert a DWARF value form code into its string name. */
21244 static const char *
21245 dwarf_form_name (unsigned form
)
21247 const char *name
= get_DW_FORM_name (form
);
21250 return "DW_FORM_<unknown>";
21255 static const char *
21256 dwarf_bool_name (unsigned mybool
)
21264 /* Convert a DWARF type code into its string name. */
21266 static const char *
21267 dwarf_type_encoding_name (unsigned enc
)
21269 const char *name
= get_DW_ATE_name (enc
);
21272 return "DW_ATE_<unknown>";
21278 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21282 print_spaces (indent
, f
);
21283 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
21284 dwarf_tag_name (die
->tag
), die
->abbrev
,
21285 to_underlying (die
->sect_off
));
21287 if (die
->parent
!= NULL
)
21289 print_spaces (indent
, f
);
21290 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
21291 to_underlying (die
->parent
->sect_off
));
21294 print_spaces (indent
, f
);
21295 fprintf_unfiltered (f
, " has children: %s\n",
21296 dwarf_bool_name (die
->child
!= NULL
));
21298 print_spaces (indent
, f
);
21299 fprintf_unfiltered (f
, " attributes:\n");
21301 for (i
= 0; i
< die
->num_attrs
; ++i
)
21303 print_spaces (indent
, f
);
21304 fprintf_unfiltered (f
, " %s (%s) ",
21305 dwarf_attr_name (die
->attrs
[i
].name
),
21306 dwarf_form_name (die
->attrs
[i
].form
));
21308 switch (die
->attrs
[i
].form
)
21311 case DW_FORM_GNU_addr_index
:
21312 fprintf_unfiltered (f
, "address: ");
21313 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21315 case DW_FORM_block2
:
21316 case DW_FORM_block4
:
21317 case DW_FORM_block
:
21318 case DW_FORM_block1
:
21319 fprintf_unfiltered (f
, "block: size %s",
21320 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21322 case DW_FORM_exprloc
:
21323 fprintf_unfiltered (f
, "expression: size %s",
21324 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21326 case DW_FORM_data16
:
21327 fprintf_unfiltered (f
, "constant of 16 bytes");
21329 case DW_FORM_ref_addr
:
21330 fprintf_unfiltered (f
, "ref address: ");
21331 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21333 case DW_FORM_GNU_ref_alt
:
21334 fprintf_unfiltered (f
, "alt ref address: ");
21335 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21341 case DW_FORM_ref_udata
:
21342 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21343 (long) (DW_UNSND (&die
->attrs
[i
])));
21345 case DW_FORM_data1
:
21346 case DW_FORM_data2
:
21347 case DW_FORM_data4
:
21348 case DW_FORM_data8
:
21349 case DW_FORM_udata
:
21350 case DW_FORM_sdata
:
21351 fprintf_unfiltered (f
, "constant: %s",
21352 pulongest (DW_UNSND (&die
->attrs
[i
])));
21354 case DW_FORM_sec_offset
:
21355 fprintf_unfiltered (f
, "section offset: %s",
21356 pulongest (DW_UNSND (&die
->attrs
[i
])));
21358 case DW_FORM_ref_sig8
:
21359 fprintf_unfiltered (f
, "signature: %s",
21360 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21362 case DW_FORM_string
:
21364 case DW_FORM_line_strp
:
21365 case DW_FORM_GNU_str_index
:
21366 case DW_FORM_GNU_strp_alt
:
21367 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21368 DW_STRING (&die
->attrs
[i
])
21369 ? DW_STRING (&die
->attrs
[i
]) : "",
21370 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21373 if (DW_UNSND (&die
->attrs
[i
]))
21374 fprintf_unfiltered (f
, "flag: TRUE");
21376 fprintf_unfiltered (f
, "flag: FALSE");
21378 case DW_FORM_flag_present
:
21379 fprintf_unfiltered (f
, "flag: TRUE");
21381 case DW_FORM_indirect
:
21382 /* The reader will have reduced the indirect form to
21383 the "base form" so this form should not occur. */
21384 fprintf_unfiltered (f
,
21385 "unexpected attribute form: DW_FORM_indirect");
21387 case DW_FORM_implicit_const
:
21388 fprintf_unfiltered (f
, "constant: %s",
21389 plongest (DW_SND (&die
->attrs
[i
])));
21392 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21393 die
->attrs
[i
].form
);
21396 fprintf_unfiltered (f
, "\n");
21401 dump_die_for_error (struct die_info
*die
)
21403 dump_die_shallow (gdb_stderr
, 0, die
);
21407 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21409 int indent
= level
* 4;
21411 gdb_assert (die
!= NULL
);
21413 if (level
>= max_level
)
21416 dump_die_shallow (f
, indent
, die
);
21418 if (die
->child
!= NULL
)
21420 print_spaces (indent
, f
);
21421 fprintf_unfiltered (f
, " Children:");
21422 if (level
+ 1 < max_level
)
21424 fprintf_unfiltered (f
, "\n");
21425 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
21429 fprintf_unfiltered (f
,
21430 " [not printed, max nesting level reached]\n");
21434 if (die
->sibling
!= NULL
&& level
> 0)
21436 dump_die_1 (f
, level
, max_level
, die
->sibling
);
21440 /* This is called from the pdie macro in gdbinit.in.
21441 It's not static so gcc will keep a copy callable from gdb. */
21444 dump_die (struct die_info
*die
, int max_level
)
21446 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
21450 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
21454 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
21455 to_underlying (die
->sect_off
),
21461 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
21465 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
21467 if (attr_form_is_ref (attr
))
21468 return (sect_offset
) DW_UNSND (attr
);
21470 complaint (&symfile_complaints
,
21471 _("unsupported die ref attribute form: '%s'"),
21472 dwarf_form_name (attr
->form
));
21476 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
21477 * the value held by the attribute is not constant. */
21480 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
21482 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
21483 return DW_SND (attr
);
21484 else if (attr
->form
== DW_FORM_udata
21485 || attr
->form
== DW_FORM_data1
21486 || attr
->form
== DW_FORM_data2
21487 || attr
->form
== DW_FORM_data4
21488 || attr
->form
== DW_FORM_data8
)
21489 return DW_UNSND (attr
);
21492 /* For DW_FORM_data16 see attr_form_is_constant. */
21493 complaint (&symfile_complaints
,
21494 _("Attribute value is not a constant (%s)"),
21495 dwarf_form_name (attr
->form
));
21496 return default_value
;
21500 /* Follow reference or signature attribute ATTR of SRC_DIE.
21501 On entry *REF_CU is the CU of SRC_DIE.
21502 On exit *REF_CU is the CU of the result. */
21504 static struct die_info
*
21505 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21506 struct dwarf2_cu
**ref_cu
)
21508 struct die_info
*die
;
21510 if (attr_form_is_ref (attr
))
21511 die
= follow_die_ref (src_die
, attr
, ref_cu
);
21512 else if (attr
->form
== DW_FORM_ref_sig8
)
21513 die
= follow_die_sig (src_die
, attr
, ref_cu
);
21516 dump_die_for_error (src_die
);
21517 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
21518 objfile_name ((*ref_cu
)->objfile
));
21524 /* Follow reference OFFSET.
21525 On entry *REF_CU is the CU of the source die referencing OFFSET.
21526 On exit *REF_CU is the CU of the result.
21527 Returns NULL if OFFSET is invalid. */
21529 static struct die_info
*
21530 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
21531 struct dwarf2_cu
**ref_cu
)
21533 struct die_info temp_die
;
21534 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
21536 gdb_assert (cu
->per_cu
!= NULL
);
21540 if (cu
->per_cu
->is_debug_types
)
21542 /* .debug_types CUs cannot reference anything outside their CU.
21543 If they need to, they have to reference a signatured type via
21544 DW_FORM_ref_sig8. */
21545 if (!offset_in_cu_p (&cu
->header
, sect_off
))
21548 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
21549 || !offset_in_cu_p (&cu
->header
, sect_off
))
21551 struct dwarf2_per_cu_data
*per_cu
;
21553 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
21556 /* If necessary, add it to the queue and load its DIEs. */
21557 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
21558 load_full_comp_unit (per_cu
, cu
->language
);
21560 target_cu
= per_cu
->cu
;
21562 else if (cu
->dies
== NULL
)
21564 /* We're loading full DIEs during partial symbol reading. */
21565 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
21566 load_full_comp_unit (cu
->per_cu
, language_minimal
);
21569 *ref_cu
= target_cu
;
21570 temp_die
.sect_off
= sect_off
;
21571 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
21573 to_underlying (sect_off
));
21576 /* Follow reference attribute ATTR of SRC_DIE.
21577 On entry *REF_CU is the CU of SRC_DIE.
21578 On exit *REF_CU is the CU of the result. */
21580 static struct die_info
*
21581 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
21582 struct dwarf2_cu
**ref_cu
)
21584 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21585 struct dwarf2_cu
*cu
= *ref_cu
;
21586 struct die_info
*die
;
21588 die
= follow_die_offset (sect_off
,
21589 (attr
->form
== DW_FORM_GNU_ref_alt
21590 || cu
->per_cu
->is_dwz
),
21593 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
21594 "at 0x%x [in module %s]"),
21595 to_underlying (sect_off
), to_underlying (src_die
->sect_off
),
21596 objfile_name (cu
->objfile
));
21601 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
21602 Returned value is intended for DW_OP_call*. Returned
21603 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
21605 struct dwarf2_locexpr_baton
21606 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
21607 struct dwarf2_per_cu_data
*per_cu
,
21608 CORE_ADDR (*get_frame_pc
) (void *baton
),
21611 struct dwarf2_cu
*cu
;
21612 struct die_info
*die
;
21613 struct attribute
*attr
;
21614 struct dwarf2_locexpr_baton retval
;
21616 dw2_setup (per_cu
->objfile
);
21618 if (per_cu
->cu
== NULL
)
21623 /* We shouldn't get here for a dummy CU, but don't crash on the user.
21624 Instead just throw an error, not much else we can do. */
21625 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
21626 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21629 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21631 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
21632 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21634 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21637 /* DWARF: "If there is no such attribute, then there is no effect.".
21638 DATA is ignored if SIZE is 0. */
21640 retval
.data
= NULL
;
21643 else if (attr_form_is_section_offset (attr
))
21645 struct dwarf2_loclist_baton loclist_baton
;
21646 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
21649 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
21651 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
21653 retval
.size
= size
;
21657 if (!attr_form_is_block (attr
))
21658 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
21659 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
21660 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21662 retval
.data
= DW_BLOCK (attr
)->data
;
21663 retval
.size
= DW_BLOCK (attr
)->size
;
21665 retval
.per_cu
= cu
->per_cu
;
21667 age_cached_comp_units ();
21672 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
21675 struct dwarf2_locexpr_baton
21676 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
21677 struct dwarf2_per_cu_data
*per_cu
,
21678 CORE_ADDR (*get_frame_pc
) (void *baton
),
21681 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
21683 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
21686 /* Write a constant of a given type as target-ordered bytes into
21689 static const gdb_byte
*
21690 write_constant_as_bytes (struct obstack
*obstack
,
21691 enum bfd_endian byte_order
,
21698 *len
= TYPE_LENGTH (type
);
21699 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
21700 store_unsigned_integer (result
, *len
, byte_order
, value
);
21705 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
21706 pointer to the constant bytes and set LEN to the length of the
21707 data. If memory is needed, allocate it on OBSTACK. If the DIE
21708 does not have a DW_AT_const_value, return NULL. */
21711 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
21712 struct dwarf2_per_cu_data
*per_cu
,
21713 struct obstack
*obstack
,
21716 struct dwarf2_cu
*cu
;
21717 struct die_info
*die
;
21718 struct attribute
*attr
;
21719 const gdb_byte
*result
= NULL
;
21722 enum bfd_endian byte_order
;
21724 dw2_setup (per_cu
->objfile
);
21726 if (per_cu
->cu
== NULL
)
21731 /* We shouldn't get here for a dummy CU, but don't crash on the user.
21732 Instead just throw an error, not much else we can do. */
21733 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
21734 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21737 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21739 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
21740 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21743 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21747 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
21748 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21750 switch (attr
->form
)
21753 case DW_FORM_GNU_addr_index
:
21757 *len
= cu
->header
.addr_size
;
21758 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
21759 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
21763 case DW_FORM_string
:
21765 case DW_FORM_GNU_str_index
:
21766 case DW_FORM_GNU_strp_alt
:
21767 /* DW_STRING is already allocated on the objfile obstack, point
21769 result
= (const gdb_byte
*) DW_STRING (attr
);
21770 *len
= strlen (DW_STRING (attr
));
21772 case DW_FORM_block1
:
21773 case DW_FORM_block2
:
21774 case DW_FORM_block4
:
21775 case DW_FORM_block
:
21776 case DW_FORM_exprloc
:
21777 case DW_FORM_data16
:
21778 result
= DW_BLOCK (attr
)->data
;
21779 *len
= DW_BLOCK (attr
)->size
;
21782 /* The DW_AT_const_value attributes are supposed to carry the
21783 symbol's value "represented as it would be on the target
21784 architecture." By the time we get here, it's already been
21785 converted to host endianness, so we just need to sign- or
21786 zero-extend it as appropriate. */
21787 case DW_FORM_data1
:
21788 type
= die_type (die
, cu
);
21789 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
21790 if (result
== NULL
)
21791 result
= write_constant_as_bytes (obstack
, byte_order
,
21794 case DW_FORM_data2
:
21795 type
= die_type (die
, cu
);
21796 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
21797 if (result
== NULL
)
21798 result
= write_constant_as_bytes (obstack
, byte_order
,
21801 case DW_FORM_data4
:
21802 type
= die_type (die
, cu
);
21803 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
21804 if (result
== NULL
)
21805 result
= write_constant_as_bytes (obstack
, byte_order
,
21808 case DW_FORM_data8
:
21809 type
= die_type (die
, cu
);
21810 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
21811 if (result
== NULL
)
21812 result
= write_constant_as_bytes (obstack
, byte_order
,
21816 case DW_FORM_sdata
:
21817 case DW_FORM_implicit_const
:
21818 type
= die_type (die
, cu
);
21819 result
= write_constant_as_bytes (obstack
, byte_order
,
21820 type
, DW_SND (attr
), len
);
21823 case DW_FORM_udata
:
21824 type
= die_type (die
, cu
);
21825 result
= write_constant_as_bytes (obstack
, byte_order
,
21826 type
, DW_UNSND (attr
), len
);
21830 complaint (&symfile_complaints
,
21831 _("unsupported const value attribute form: '%s'"),
21832 dwarf_form_name (attr
->form
));
21839 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
21840 valid type for this die is found. */
21843 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
21844 struct dwarf2_per_cu_data
*per_cu
)
21846 struct dwarf2_cu
*cu
;
21847 struct die_info
*die
;
21849 dw2_setup (per_cu
->objfile
);
21851 if (per_cu
->cu
== NULL
)
21857 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21861 return die_type (die
, cu
);
21864 /* Return the type of the DIE at DIE_OFFSET in the CU named by
21868 dwarf2_get_die_type (cu_offset die_offset
,
21869 struct dwarf2_per_cu_data
*per_cu
)
21871 dw2_setup (per_cu
->objfile
);
21873 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
21874 return get_die_type_at_offset (die_offset_sect
, per_cu
);
21877 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
21878 On entry *REF_CU is the CU of SRC_DIE.
21879 On exit *REF_CU is the CU of the result.
21880 Returns NULL if the referenced DIE isn't found. */
21882 static struct die_info
*
21883 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
21884 struct dwarf2_cu
**ref_cu
)
21886 struct die_info temp_die
;
21887 struct dwarf2_cu
*sig_cu
;
21888 struct die_info
*die
;
21890 /* While it might be nice to assert sig_type->type == NULL here,
21891 we can get here for DW_AT_imported_declaration where we need
21892 the DIE not the type. */
21894 /* If necessary, add it to the queue and load its DIEs. */
21896 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
21897 read_signatured_type (sig_type
);
21899 sig_cu
= sig_type
->per_cu
.cu
;
21900 gdb_assert (sig_cu
!= NULL
);
21901 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
21902 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
21903 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
21904 to_underlying (temp_die
.sect_off
));
21907 /* For .gdb_index version 7 keep track of included TUs.
21908 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
21909 if (dwarf2_per_objfile
->index_table
!= NULL
21910 && dwarf2_per_objfile
->index_table
->version
<= 7)
21912 VEC_safe_push (dwarf2_per_cu_ptr
,
21913 (*ref_cu
)->per_cu
->imported_symtabs
,
21924 /* Follow signatured type referenced by ATTR in SRC_DIE.
21925 On entry *REF_CU is the CU of SRC_DIE.
21926 On exit *REF_CU is the CU of the result.
21927 The result is the DIE of the type.
21928 If the referenced type cannot be found an error is thrown. */
21930 static struct die_info
*
21931 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21932 struct dwarf2_cu
**ref_cu
)
21934 ULONGEST signature
= DW_SIGNATURE (attr
);
21935 struct signatured_type
*sig_type
;
21936 struct die_info
*die
;
21938 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
21940 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
21941 /* sig_type will be NULL if the signatured type is missing from
21943 if (sig_type
== NULL
)
21945 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
21946 " from DIE at 0x%x [in module %s]"),
21947 hex_string (signature
), to_underlying (src_die
->sect_off
),
21948 objfile_name ((*ref_cu
)->objfile
));
21951 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
21954 dump_die_for_error (src_die
);
21955 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
21956 " from DIE at 0x%x [in module %s]"),
21957 hex_string (signature
), to_underlying (src_die
->sect_off
),
21958 objfile_name ((*ref_cu
)->objfile
));
21964 /* Get the type specified by SIGNATURE referenced in DIE/CU,
21965 reading in and processing the type unit if necessary. */
21967 static struct type
*
21968 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
21969 struct dwarf2_cu
*cu
)
21971 struct signatured_type
*sig_type
;
21972 struct dwarf2_cu
*type_cu
;
21973 struct die_info
*type_die
;
21976 sig_type
= lookup_signatured_type (cu
, signature
);
21977 /* sig_type will be NULL if the signatured type is missing from
21979 if (sig_type
== NULL
)
21981 complaint (&symfile_complaints
,
21982 _("Dwarf Error: Cannot find signatured DIE %s referenced"
21983 " from DIE at 0x%x [in module %s]"),
21984 hex_string (signature
), to_underlying (die
->sect_off
),
21985 objfile_name (dwarf2_per_objfile
->objfile
));
21986 return build_error_marker_type (cu
, die
);
21989 /* If we already know the type we're done. */
21990 if (sig_type
->type
!= NULL
)
21991 return sig_type
->type
;
21994 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
21995 if (type_die
!= NULL
)
21997 /* N.B. We need to call get_die_type to ensure only one type for this DIE
21998 is created. This is important, for example, because for c++ classes
21999 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22000 type
= read_type_die (type_die
, type_cu
);
22003 complaint (&symfile_complaints
,
22004 _("Dwarf Error: Cannot build signatured type %s"
22005 " referenced from DIE at 0x%x [in module %s]"),
22006 hex_string (signature
), to_underlying (die
->sect_off
),
22007 objfile_name (dwarf2_per_objfile
->objfile
));
22008 type
= build_error_marker_type (cu
, die
);
22013 complaint (&symfile_complaints
,
22014 _("Dwarf Error: Problem reading signatured DIE %s referenced"
22015 " from DIE at 0x%x [in module %s]"),
22016 hex_string (signature
), to_underlying (die
->sect_off
),
22017 objfile_name (dwarf2_per_objfile
->objfile
));
22018 type
= build_error_marker_type (cu
, die
);
22020 sig_type
->type
= type
;
22025 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22026 reading in and processing the type unit if necessary. */
22028 static struct type
*
22029 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22030 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22032 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22033 if (attr_form_is_ref (attr
))
22035 struct dwarf2_cu
*type_cu
= cu
;
22036 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22038 return read_type_die (type_die
, type_cu
);
22040 else if (attr
->form
== DW_FORM_ref_sig8
)
22042 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22046 complaint (&symfile_complaints
,
22047 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22048 " at 0x%x [in module %s]"),
22049 dwarf_form_name (attr
->form
), to_underlying (die
->sect_off
),
22050 objfile_name (dwarf2_per_objfile
->objfile
));
22051 return build_error_marker_type (cu
, die
);
22055 /* Load the DIEs associated with type unit PER_CU into memory. */
22058 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22060 struct signatured_type
*sig_type
;
22062 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22063 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
22065 /* We have the per_cu, but we need the signatured_type.
22066 Fortunately this is an easy translation. */
22067 gdb_assert (per_cu
->is_debug_types
);
22068 sig_type
= (struct signatured_type
*) per_cu
;
22070 gdb_assert (per_cu
->cu
== NULL
);
22072 read_signatured_type (sig_type
);
22074 gdb_assert (per_cu
->cu
!= NULL
);
22077 /* die_reader_func for read_signatured_type.
22078 This is identical to load_full_comp_unit_reader,
22079 but is kept separate for now. */
22082 read_signatured_type_reader (const struct die_reader_specs
*reader
,
22083 const gdb_byte
*info_ptr
,
22084 struct die_info
*comp_unit_die
,
22088 struct dwarf2_cu
*cu
= reader
->cu
;
22090 gdb_assert (cu
->die_hash
== NULL
);
22092 htab_create_alloc_ex (cu
->header
.length
/ 12,
22096 &cu
->comp_unit_obstack
,
22097 hashtab_obstack_allocate
,
22098 dummy_obstack_deallocate
);
22101 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
22102 &info_ptr
, comp_unit_die
);
22103 cu
->dies
= comp_unit_die
;
22104 /* comp_unit_die is not stored in die_hash, no need. */
22106 /* We try not to read any attributes in this function, because not
22107 all CUs needed for references have been loaded yet, and symbol
22108 table processing isn't initialized. But we have to set the CU language,
22109 or we won't be able to build types correctly.
22110 Similarly, if we do not read the producer, we can not apply
22111 producer-specific interpretation. */
22112 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22115 /* Read in a signatured type and build its CU and DIEs.
22116 If the type is a stub for the real type in a DWO file,
22117 read in the real type from the DWO file as well. */
22120 read_signatured_type (struct signatured_type
*sig_type
)
22122 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22124 gdb_assert (per_cu
->is_debug_types
);
22125 gdb_assert (per_cu
->cu
== NULL
);
22127 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
22128 read_signatured_type_reader
, NULL
);
22129 sig_type
->per_cu
.tu_read
= 1;
22132 /* Decode simple location descriptions.
22133 Given a pointer to a dwarf block that defines a location, compute
22134 the location and return the value.
22136 NOTE drow/2003-11-18: This function is called in two situations
22137 now: for the address of static or global variables (partial symbols
22138 only) and for offsets into structures which are expected to be
22139 (more or less) constant. The partial symbol case should go away,
22140 and only the constant case should remain. That will let this
22141 function complain more accurately. A few special modes are allowed
22142 without complaint for global variables (for instance, global
22143 register values and thread-local values).
22145 A location description containing no operations indicates that the
22146 object is optimized out. The return value is 0 for that case.
22147 FIXME drow/2003-11-16: No callers check for this case any more; soon all
22148 callers will only want a very basic result and this can become a
22151 Note that stack[0] is unused except as a default error return. */
22154 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
22156 struct objfile
*objfile
= cu
->objfile
;
22158 size_t size
= blk
->size
;
22159 const gdb_byte
*data
= blk
->data
;
22160 CORE_ADDR stack
[64];
22162 unsigned int bytes_read
, unsnd
;
22168 stack
[++stacki
] = 0;
22207 stack
[++stacki
] = op
- DW_OP_lit0
;
22242 stack
[++stacki
] = op
- DW_OP_reg0
;
22244 dwarf2_complex_location_expr_complaint ();
22248 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22250 stack
[++stacki
] = unsnd
;
22252 dwarf2_complex_location_expr_complaint ();
22256 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
22261 case DW_OP_const1u
:
22262 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22266 case DW_OP_const1s
:
22267 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22271 case DW_OP_const2u
:
22272 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22276 case DW_OP_const2s
:
22277 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22281 case DW_OP_const4u
:
22282 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22286 case DW_OP_const4s
:
22287 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22291 case DW_OP_const8u
:
22292 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22297 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22303 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22308 stack
[stacki
+ 1] = stack
[stacki
];
22313 stack
[stacki
- 1] += stack
[stacki
];
22317 case DW_OP_plus_uconst
:
22318 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22324 stack
[stacki
- 1] -= stack
[stacki
];
22329 /* If we're not the last op, then we definitely can't encode
22330 this using GDB's address_class enum. This is valid for partial
22331 global symbols, although the variable's address will be bogus
22334 dwarf2_complex_location_expr_complaint ();
22337 case DW_OP_GNU_push_tls_address
:
22338 case DW_OP_form_tls_address
:
22339 /* The top of the stack has the offset from the beginning
22340 of the thread control block at which the variable is located. */
22341 /* Nothing should follow this operator, so the top of stack would
22343 /* This is valid for partial global symbols, but the variable's
22344 address will be bogus in the psymtab. Make it always at least
22345 non-zero to not look as a variable garbage collected by linker
22346 which have DW_OP_addr 0. */
22348 dwarf2_complex_location_expr_complaint ();
22352 case DW_OP_GNU_uninit
:
22355 case DW_OP_GNU_addr_index
:
22356 case DW_OP_GNU_const_index
:
22357 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22364 const char *name
= get_DW_OP_name (op
);
22367 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
22370 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
22374 return (stack
[stacki
]);
22377 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22378 outside of the allocated space. Also enforce minimum>0. */
22379 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22381 complaint (&symfile_complaints
,
22382 _("location description stack overflow"));
22388 complaint (&symfile_complaints
,
22389 _("location description stack underflow"));
22393 return (stack
[stacki
]);
22396 /* memory allocation interface */
22398 static struct dwarf_block
*
22399 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22401 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22404 static struct die_info
*
22405 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22407 struct die_info
*die
;
22408 size_t size
= sizeof (struct die_info
);
22411 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22413 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
22414 memset (die
, 0, sizeof (struct die_info
));
22419 /* Macro support. */
22421 /* Return file name relative to the compilation directory of file number I in
22422 *LH's file name table. The result is allocated using xmalloc; the caller is
22423 responsible for freeing it. */
22426 file_file_name (int file
, struct line_header
*lh
)
22428 /* Is the file number a valid index into the line header's file name
22429 table? Remember that file numbers start with one, not zero. */
22430 if (1 <= file
&& file
<= lh
->file_names
.size ())
22432 const file_entry
&fe
= lh
->file_names
[file
- 1];
22434 if (!IS_ABSOLUTE_PATH (fe
.name
))
22436 const char *dir
= fe
.include_dir (lh
);
22438 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
22440 return xstrdup (fe
.name
);
22444 /* The compiler produced a bogus file number. We can at least
22445 record the macro definitions made in the file, even if we
22446 won't be able to find the file by name. */
22447 char fake_name
[80];
22449 xsnprintf (fake_name
, sizeof (fake_name
),
22450 "<bad macro file number %d>", file
);
22452 complaint (&symfile_complaints
,
22453 _("bad file number in macro information (%d)"),
22456 return xstrdup (fake_name
);
22460 /* Return the full name of file number I in *LH's file name table.
22461 Use COMP_DIR as the name of the current directory of the
22462 compilation. The result is allocated using xmalloc; the caller is
22463 responsible for freeing it. */
22465 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
22467 /* Is the file number a valid index into the line header's file name
22468 table? Remember that file numbers start with one, not zero. */
22469 if (1 <= file
&& file
<= lh
->file_names
.size ())
22471 char *relative
= file_file_name (file
, lh
);
22473 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
22475 return reconcat (relative
, comp_dir
, SLASH_STRING
,
22476 relative
, (char *) NULL
);
22479 return file_file_name (file
, lh
);
22483 static struct macro_source_file
*
22484 macro_start_file (int file
, int line
,
22485 struct macro_source_file
*current_file
,
22486 struct line_header
*lh
)
22488 /* File name relative to the compilation directory of this source file. */
22489 char *file_name
= file_file_name (file
, lh
);
22491 if (! current_file
)
22493 /* Note: We don't create a macro table for this compilation unit
22494 at all until we actually get a filename. */
22495 struct macro_table
*macro_table
= get_macro_table ();
22497 /* If we have no current file, then this must be the start_file
22498 directive for the compilation unit's main source file. */
22499 current_file
= macro_set_main (macro_table
, file_name
);
22500 macro_define_special (macro_table
);
22503 current_file
= macro_include (current_file
, line
, file_name
);
22507 return current_file
;
22510 static const char *
22511 consume_improper_spaces (const char *p
, const char *body
)
22515 complaint (&symfile_complaints
,
22516 _("macro definition contains spaces "
22517 "in formal argument list:\n`%s'"),
22529 parse_macro_definition (struct macro_source_file
*file
, int line
,
22534 /* The body string takes one of two forms. For object-like macro
22535 definitions, it should be:
22537 <macro name> " " <definition>
22539 For function-like macro definitions, it should be:
22541 <macro name> "() " <definition>
22543 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
22545 Spaces may appear only where explicitly indicated, and in the
22548 The Dwarf 2 spec says that an object-like macro's name is always
22549 followed by a space, but versions of GCC around March 2002 omit
22550 the space when the macro's definition is the empty string.
22552 The Dwarf 2 spec says that there should be no spaces between the
22553 formal arguments in a function-like macro's formal argument list,
22554 but versions of GCC around March 2002 include spaces after the
22558 /* Find the extent of the macro name. The macro name is terminated
22559 by either a space or null character (for an object-like macro) or
22560 an opening paren (for a function-like macro). */
22561 for (p
= body
; *p
; p
++)
22562 if (*p
== ' ' || *p
== '(')
22565 if (*p
== ' ' || *p
== '\0')
22567 /* It's an object-like macro. */
22568 int name_len
= p
- body
;
22569 char *name
= savestring (body
, name_len
);
22570 const char *replacement
;
22573 replacement
= body
+ name_len
+ 1;
22576 dwarf2_macro_malformed_definition_complaint (body
);
22577 replacement
= body
+ name_len
;
22580 macro_define_object (file
, line
, name
, replacement
);
22584 else if (*p
== '(')
22586 /* It's a function-like macro. */
22587 char *name
= savestring (body
, p
- body
);
22590 char **argv
= XNEWVEC (char *, argv_size
);
22594 p
= consume_improper_spaces (p
, body
);
22596 /* Parse the formal argument list. */
22597 while (*p
&& *p
!= ')')
22599 /* Find the extent of the current argument name. */
22600 const char *arg_start
= p
;
22602 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
22605 if (! *p
|| p
== arg_start
)
22606 dwarf2_macro_malformed_definition_complaint (body
);
22609 /* Make sure argv has room for the new argument. */
22610 if (argc
>= argv_size
)
22613 argv
= XRESIZEVEC (char *, argv
, argv_size
);
22616 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
22619 p
= consume_improper_spaces (p
, body
);
22621 /* Consume the comma, if present. */
22626 p
= consume_improper_spaces (p
, body
);
22635 /* Perfectly formed definition, no complaints. */
22636 macro_define_function (file
, line
, name
,
22637 argc
, (const char **) argv
,
22639 else if (*p
== '\0')
22641 /* Complain, but do define it. */
22642 dwarf2_macro_malformed_definition_complaint (body
);
22643 macro_define_function (file
, line
, name
,
22644 argc
, (const char **) argv
,
22648 /* Just complain. */
22649 dwarf2_macro_malformed_definition_complaint (body
);
22652 /* Just complain. */
22653 dwarf2_macro_malformed_definition_complaint (body
);
22659 for (i
= 0; i
< argc
; i
++)
22665 dwarf2_macro_malformed_definition_complaint (body
);
22668 /* Skip some bytes from BYTES according to the form given in FORM.
22669 Returns the new pointer. */
22671 static const gdb_byte
*
22672 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
22673 enum dwarf_form form
,
22674 unsigned int offset_size
,
22675 struct dwarf2_section_info
*section
)
22677 unsigned int bytes_read
;
22681 case DW_FORM_data1
:
22686 case DW_FORM_data2
:
22690 case DW_FORM_data4
:
22694 case DW_FORM_data8
:
22698 case DW_FORM_data16
:
22702 case DW_FORM_string
:
22703 read_direct_string (abfd
, bytes
, &bytes_read
);
22704 bytes
+= bytes_read
;
22707 case DW_FORM_sec_offset
:
22709 case DW_FORM_GNU_strp_alt
:
22710 bytes
+= offset_size
;
22713 case DW_FORM_block
:
22714 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
22715 bytes
+= bytes_read
;
22718 case DW_FORM_block1
:
22719 bytes
+= 1 + read_1_byte (abfd
, bytes
);
22721 case DW_FORM_block2
:
22722 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
22724 case DW_FORM_block4
:
22725 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
22728 case DW_FORM_sdata
:
22729 case DW_FORM_udata
:
22730 case DW_FORM_GNU_addr_index
:
22731 case DW_FORM_GNU_str_index
:
22732 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
22735 dwarf2_section_buffer_overflow_complaint (section
);
22740 case DW_FORM_implicit_const
:
22746 complaint (&symfile_complaints
,
22747 _("invalid form 0x%x in `%s'"),
22748 form
, get_section_name (section
));
22756 /* A helper for dwarf_decode_macros that handles skipping an unknown
22757 opcode. Returns an updated pointer to the macro data buffer; or,
22758 on error, issues a complaint and returns NULL. */
22760 static const gdb_byte
*
22761 skip_unknown_opcode (unsigned int opcode
,
22762 const gdb_byte
**opcode_definitions
,
22763 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22765 unsigned int offset_size
,
22766 struct dwarf2_section_info
*section
)
22768 unsigned int bytes_read
, i
;
22770 const gdb_byte
*defn
;
22772 if (opcode_definitions
[opcode
] == NULL
)
22774 complaint (&symfile_complaints
,
22775 _("unrecognized DW_MACFINO opcode 0x%x"),
22780 defn
= opcode_definitions
[opcode
];
22781 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
22782 defn
+= bytes_read
;
22784 for (i
= 0; i
< arg
; ++i
)
22786 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
22787 (enum dwarf_form
) defn
[i
], offset_size
,
22789 if (mac_ptr
== NULL
)
22791 /* skip_form_bytes already issued the complaint. */
22799 /* A helper function which parses the header of a macro section.
22800 If the macro section is the extended (for now called "GNU") type,
22801 then this updates *OFFSET_SIZE. Returns a pointer to just after
22802 the header, or issues a complaint and returns NULL on error. */
22804 static const gdb_byte
*
22805 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
22807 const gdb_byte
*mac_ptr
,
22808 unsigned int *offset_size
,
22809 int section_is_gnu
)
22811 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
22813 if (section_is_gnu
)
22815 unsigned int version
, flags
;
22817 version
= read_2_bytes (abfd
, mac_ptr
);
22818 if (version
!= 4 && version
!= 5)
22820 complaint (&symfile_complaints
,
22821 _("unrecognized version `%d' in .debug_macro section"),
22827 flags
= read_1_byte (abfd
, mac_ptr
);
22829 *offset_size
= (flags
& 1) ? 8 : 4;
22831 if ((flags
& 2) != 0)
22832 /* We don't need the line table offset. */
22833 mac_ptr
+= *offset_size
;
22835 /* Vendor opcode descriptions. */
22836 if ((flags
& 4) != 0)
22838 unsigned int i
, count
;
22840 count
= read_1_byte (abfd
, mac_ptr
);
22842 for (i
= 0; i
< count
; ++i
)
22844 unsigned int opcode
, bytes_read
;
22847 opcode
= read_1_byte (abfd
, mac_ptr
);
22849 opcode_definitions
[opcode
] = mac_ptr
;
22850 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22851 mac_ptr
+= bytes_read
;
22860 /* A helper for dwarf_decode_macros that handles the GNU extensions,
22861 including DW_MACRO_import. */
22864 dwarf_decode_macro_bytes (bfd
*abfd
,
22865 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22866 struct macro_source_file
*current_file
,
22867 struct line_header
*lh
,
22868 struct dwarf2_section_info
*section
,
22869 int section_is_gnu
, int section_is_dwz
,
22870 unsigned int offset_size
,
22871 htab_t include_hash
)
22873 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22874 enum dwarf_macro_record_type macinfo_type
;
22875 int at_commandline
;
22876 const gdb_byte
*opcode_definitions
[256];
22878 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22879 &offset_size
, section_is_gnu
);
22880 if (mac_ptr
== NULL
)
22882 /* We already issued a complaint. */
22886 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
22887 GDB is still reading the definitions from command line. First
22888 DW_MACINFO_start_file will need to be ignored as it was already executed
22889 to create CURRENT_FILE for the main source holding also the command line
22890 definitions. On first met DW_MACINFO_start_file this flag is reset to
22891 normally execute all the remaining DW_MACINFO_start_file macinfos. */
22893 at_commandline
= 1;
22897 /* Do we at least have room for a macinfo type byte? */
22898 if (mac_ptr
>= mac_end
)
22900 dwarf2_section_buffer_overflow_complaint (section
);
22904 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22907 /* Note that we rely on the fact that the corresponding GNU and
22908 DWARF constants are the same. */
22909 switch (macinfo_type
)
22911 /* A zero macinfo type indicates the end of the macro
22916 case DW_MACRO_define
:
22917 case DW_MACRO_undef
:
22918 case DW_MACRO_define_strp
:
22919 case DW_MACRO_undef_strp
:
22920 case DW_MACRO_define_sup
:
22921 case DW_MACRO_undef_sup
:
22923 unsigned int bytes_read
;
22928 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22929 mac_ptr
+= bytes_read
;
22931 if (macinfo_type
== DW_MACRO_define
22932 || macinfo_type
== DW_MACRO_undef
)
22934 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22935 mac_ptr
+= bytes_read
;
22939 LONGEST str_offset
;
22941 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22942 mac_ptr
+= offset_size
;
22944 if (macinfo_type
== DW_MACRO_define_sup
22945 || macinfo_type
== DW_MACRO_undef_sup
22948 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22950 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
22953 body
= read_indirect_string_at_offset (abfd
, str_offset
);
22956 is_define
= (macinfo_type
== DW_MACRO_define
22957 || macinfo_type
== DW_MACRO_define_strp
22958 || macinfo_type
== DW_MACRO_define_sup
);
22959 if (! current_file
)
22961 /* DWARF violation as no main source is present. */
22962 complaint (&symfile_complaints
,
22963 _("debug info with no main source gives macro %s "
22965 is_define
? _("definition") : _("undefinition"),
22969 if ((line
== 0 && !at_commandline
)
22970 || (line
!= 0 && at_commandline
))
22971 complaint (&symfile_complaints
,
22972 _("debug info gives %s macro %s with %s line %d: %s"),
22973 at_commandline
? _("command-line") : _("in-file"),
22974 is_define
? _("definition") : _("undefinition"),
22975 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
22978 parse_macro_definition (current_file
, line
, body
);
22981 gdb_assert (macinfo_type
== DW_MACRO_undef
22982 || macinfo_type
== DW_MACRO_undef_strp
22983 || macinfo_type
== DW_MACRO_undef_sup
);
22984 macro_undef (current_file
, line
, body
);
22989 case DW_MACRO_start_file
:
22991 unsigned int bytes_read
;
22994 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22995 mac_ptr
+= bytes_read
;
22996 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22997 mac_ptr
+= bytes_read
;
22999 if ((line
== 0 && !at_commandline
)
23000 || (line
!= 0 && at_commandline
))
23001 complaint (&symfile_complaints
,
23002 _("debug info gives source %d included "
23003 "from %s at %s line %d"),
23004 file
, at_commandline
? _("command-line") : _("file"),
23005 line
== 0 ? _("zero") : _("non-zero"), line
);
23007 if (at_commandline
)
23009 /* This DW_MACRO_start_file was executed in the
23011 at_commandline
= 0;
23014 current_file
= macro_start_file (file
, line
, current_file
, lh
);
23018 case DW_MACRO_end_file
:
23019 if (! current_file
)
23020 complaint (&symfile_complaints
,
23021 _("macro debug info has an unmatched "
23022 "`close_file' directive"));
23025 current_file
= current_file
->included_by
;
23026 if (! current_file
)
23028 enum dwarf_macro_record_type next_type
;
23030 /* GCC circa March 2002 doesn't produce the zero
23031 type byte marking the end of the compilation
23032 unit. Complain if it's not there, but exit no
23035 /* Do we at least have room for a macinfo type byte? */
23036 if (mac_ptr
>= mac_end
)
23038 dwarf2_section_buffer_overflow_complaint (section
);
23042 /* We don't increment mac_ptr here, so this is just
23045 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
23047 if (next_type
!= 0)
23048 complaint (&symfile_complaints
,
23049 _("no terminating 0-type entry for "
23050 "macros in `.debug_macinfo' section"));
23057 case DW_MACRO_import
:
23058 case DW_MACRO_import_sup
:
23062 bfd
*include_bfd
= abfd
;
23063 struct dwarf2_section_info
*include_section
= section
;
23064 const gdb_byte
*include_mac_end
= mac_end
;
23065 int is_dwz
= section_is_dwz
;
23066 const gdb_byte
*new_mac_ptr
;
23068 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
23069 mac_ptr
+= offset_size
;
23071 if (macinfo_type
== DW_MACRO_import_sup
)
23073 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
23075 dwarf2_read_section (objfile
, &dwz
->macro
);
23077 include_section
= &dwz
->macro
;
23078 include_bfd
= get_section_bfd_owner (include_section
);
23079 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
23083 new_mac_ptr
= include_section
->buffer
+ offset
;
23084 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
23088 /* This has actually happened; see
23089 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
23090 complaint (&symfile_complaints
,
23091 _("recursive DW_MACRO_import in "
23092 ".debug_macro section"));
23096 *slot
= (void *) new_mac_ptr
;
23098 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
23099 include_mac_end
, current_file
, lh
,
23100 section
, section_is_gnu
, is_dwz
,
23101 offset_size
, include_hash
);
23103 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
23108 case DW_MACINFO_vendor_ext
:
23109 if (!section_is_gnu
)
23111 unsigned int bytes_read
;
23113 /* This reads the constant, but since we don't recognize
23114 any vendor extensions, we ignore it. */
23115 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23116 mac_ptr
+= bytes_read
;
23117 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
23118 mac_ptr
+= bytes_read
;
23120 /* We don't recognize any vendor extensions. */
23126 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
23127 mac_ptr
, mac_end
, abfd
, offset_size
,
23129 if (mac_ptr
== NULL
)
23133 } while (macinfo_type
!= 0);
23137 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23138 int section_is_gnu
)
23140 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23141 struct line_header
*lh
= cu
->line_header
;
23143 const gdb_byte
*mac_ptr
, *mac_end
;
23144 struct macro_source_file
*current_file
= 0;
23145 enum dwarf_macro_record_type macinfo_type
;
23146 unsigned int offset_size
= cu
->header
.offset_size
;
23147 const gdb_byte
*opcode_definitions
[256];
23149 struct dwarf2_section_info
*section
;
23150 const char *section_name
;
23152 if (cu
->dwo_unit
!= NULL
)
23154 if (section_is_gnu
)
23156 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23157 section_name
= ".debug_macro.dwo";
23161 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23162 section_name
= ".debug_macinfo.dwo";
23167 if (section_is_gnu
)
23169 section
= &dwarf2_per_objfile
->macro
;
23170 section_name
= ".debug_macro";
23174 section
= &dwarf2_per_objfile
->macinfo
;
23175 section_name
= ".debug_macinfo";
23179 dwarf2_read_section (objfile
, section
);
23180 if (section
->buffer
== NULL
)
23182 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
23185 abfd
= get_section_bfd_owner (section
);
23187 /* First pass: Find the name of the base filename.
23188 This filename is needed in order to process all macros whose definition
23189 (or undefinition) comes from the command line. These macros are defined
23190 before the first DW_MACINFO_start_file entry, and yet still need to be
23191 associated to the base file.
23193 To determine the base file name, we scan the macro definitions until we
23194 reach the first DW_MACINFO_start_file entry. We then initialize
23195 CURRENT_FILE accordingly so that any macro definition found before the
23196 first DW_MACINFO_start_file can still be associated to the base file. */
23198 mac_ptr
= section
->buffer
+ offset
;
23199 mac_end
= section
->buffer
+ section
->size
;
23201 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
23202 &offset_size
, section_is_gnu
);
23203 if (mac_ptr
== NULL
)
23205 /* We already issued a complaint. */
23211 /* Do we at least have room for a macinfo type byte? */
23212 if (mac_ptr
>= mac_end
)
23214 /* Complaint is printed during the second pass as GDB will probably
23215 stop the first pass earlier upon finding
23216 DW_MACINFO_start_file. */
23220 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
23223 /* Note that we rely on the fact that the corresponding GNU and
23224 DWARF constants are the same. */
23225 switch (macinfo_type
)
23227 /* A zero macinfo type indicates the end of the macro
23232 case DW_MACRO_define
:
23233 case DW_MACRO_undef
:
23234 /* Only skip the data by MAC_PTR. */
23236 unsigned int bytes_read
;
23238 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23239 mac_ptr
+= bytes_read
;
23240 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
23241 mac_ptr
+= bytes_read
;
23245 case DW_MACRO_start_file
:
23247 unsigned int bytes_read
;
23250 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23251 mac_ptr
+= bytes_read
;
23252 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23253 mac_ptr
+= bytes_read
;
23255 current_file
= macro_start_file (file
, line
, current_file
, lh
);
23259 case DW_MACRO_end_file
:
23260 /* No data to skip by MAC_PTR. */
23263 case DW_MACRO_define_strp
:
23264 case DW_MACRO_undef_strp
:
23265 case DW_MACRO_define_sup
:
23266 case DW_MACRO_undef_sup
:
23268 unsigned int bytes_read
;
23270 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23271 mac_ptr
+= bytes_read
;
23272 mac_ptr
+= offset_size
;
23276 case DW_MACRO_import
:
23277 case DW_MACRO_import_sup
:
23278 /* Note that, according to the spec, a transparent include
23279 chain cannot call DW_MACRO_start_file. So, we can just
23280 skip this opcode. */
23281 mac_ptr
+= offset_size
;
23284 case DW_MACINFO_vendor_ext
:
23285 /* Only skip the data by MAC_PTR. */
23286 if (!section_is_gnu
)
23288 unsigned int bytes_read
;
23290 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23291 mac_ptr
+= bytes_read
;
23292 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
23293 mac_ptr
+= bytes_read
;
23298 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
23299 mac_ptr
, mac_end
, abfd
, offset_size
,
23301 if (mac_ptr
== NULL
)
23305 } while (macinfo_type
!= 0 && current_file
== NULL
);
23307 /* Second pass: Process all entries.
23309 Use the AT_COMMAND_LINE flag to determine whether we are still processing
23310 command-line macro definitions/undefinitions. This flag is unset when we
23311 reach the first DW_MACINFO_start_file entry. */
23313 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
23315 NULL
, xcalloc
, xfree
));
23316 mac_ptr
= section
->buffer
+ offset
;
23317 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
23318 *slot
= (void *) mac_ptr
;
23319 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
23320 current_file
, lh
, section
,
23321 section_is_gnu
, 0, offset_size
,
23322 include_hash
.get ());
23325 /* Check if the attribute's form is a DW_FORM_block*
23326 if so return true else false. */
23329 attr_form_is_block (const struct attribute
*attr
)
23331 return (attr
== NULL
? 0 :
23332 attr
->form
== DW_FORM_block1
23333 || attr
->form
== DW_FORM_block2
23334 || attr
->form
== DW_FORM_block4
23335 || attr
->form
== DW_FORM_block
23336 || attr
->form
== DW_FORM_exprloc
);
23339 /* Return non-zero if ATTR's value is a section offset --- classes
23340 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
23341 You may use DW_UNSND (attr) to retrieve such offsets.
23343 Section 7.5.4, "Attribute Encodings", explains that no attribute
23344 may have a value that belongs to more than one of these classes; it
23345 would be ambiguous if we did, because we use the same forms for all
23349 attr_form_is_section_offset (const struct attribute
*attr
)
23351 return (attr
->form
== DW_FORM_data4
23352 || attr
->form
== DW_FORM_data8
23353 || attr
->form
== DW_FORM_sec_offset
);
23356 /* Return non-zero if ATTR's value falls in the 'constant' class, or
23357 zero otherwise. When this function returns true, you can apply
23358 dwarf2_get_attr_constant_value to it.
23360 However, note that for some attributes you must check
23361 attr_form_is_section_offset before using this test. DW_FORM_data4
23362 and DW_FORM_data8 are members of both the constant class, and of
23363 the classes that contain offsets into other debug sections
23364 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
23365 that, if an attribute's can be either a constant or one of the
23366 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
23367 taken as section offsets, not constants.
23369 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
23370 cannot handle that. */
23373 attr_form_is_constant (const struct attribute
*attr
)
23375 switch (attr
->form
)
23377 case DW_FORM_sdata
:
23378 case DW_FORM_udata
:
23379 case DW_FORM_data1
:
23380 case DW_FORM_data2
:
23381 case DW_FORM_data4
:
23382 case DW_FORM_data8
:
23383 case DW_FORM_implicit_const
:
23391 /* DW_ADDR is always stored already as sect_offset; despite for the forms
23392 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
23395 attr_form_is_ref (const struct attribute
*attr
)
23397 switch (attr
->form
)
23399 case DW_FORM_ref_addr
:
23404 case DW_FORM_ref_udata
:
23405 case DW_FORM_GNU_ref_alt
:
23412 /* Return the .debug_loc section to use for CU.
23413 For DWO files use .debug_loc.dwo. */
23415 static struct dwarf2_section_info
*
23416 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23420 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23422 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23424 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23425 : &dwarf2_per_objfile
->loc
);
23428 /* A helper function that fills in a dwarf2_loclist_baton. */
23431 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23432 struct dwarf2_loclist_baton
*baton
,
23433 const struct attribute
*attr
)
23435 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23437 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
23439 baton
->per_cu
= cu
->per_cu
;
23440 gdb_assert (baton
->per_cu
);
23441 /* We don't know how long the location list is, but make sure we
23442 don't run off the edge of the section. */
23443 baton
->size
= section
->size
- DW_UNSND (attr
);
23444 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23445 baton
->base_address
= cu
->base_address
;
23446 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23450 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23451 struct dwarf2_cu
*cu
, int is_block
)
23453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23454 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23456 if (attr_form_is_section_offset (attr
)
23457 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23458 the section. If so, fall through to the complaint in the
23460 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
23462 struct dwarf2_loclist_baton
*baton
;
23464 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23466 fill_in_loclist_baton (cu
, baton
, attr
);
23468 if (cu
->base_known
== 0)
23469 complaint (&symfile_complaints
,
23470 _("Location list used without "
23471 "specifying the CU base address."));
23473 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23474 ? dwarf2_loclist_block_index
23475 : dwarf2_loclist_index
);
23476 SYMBOL_LOCATION_BATON (sym
) = baton
;
23480 struct dwarf2_locexpr_baton
*baton
;
23482 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23483 baton
->per_cu
= cu
->per_cu
;
23484 gdb_assert (baton
->per_cu
);
23486 if (attr_form_is_block (attr
))
23488 /* Note that we're just copying the block's data pointer
23489 here, not the actual data. We're still pointing into the
23490 info_buffer for SYM's objfile; right now we never release
23491 that buffer, but when we do clean up properly this may
23493 baton
->size
= DW_BLOCK (attr
)->size
;
23494 baton
->data
= DW_BLOCK (attr
)->data
;
23498 dwarf2_invalid_attrib_class_complaint ("location description",
23499 SYMBOL_NATURAL_NAME (sym
));
23503 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23504 ? dwarf2_locexpr_block_index
23505 : dwarf2_locexpr_index
);
23506 SYMBOL_LOCATION_BATON (sym
) = baton
;
23510 /* Return the OBJFILE associated with the compilation unit CU. If CU
23511 came from a separate debuginfo file, then the master objfile is
23515 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
23517 struct objfile
*objfile
= per_cu
->objfile
;
23519 /* Return the master objfile, so that we can report and look up the
23520 correct file containing this variable. */
23521 if (objfile
->separate_debug_objfile_backlink
)
23522 objfile
= objfile
->separate_debug_objfile_backlink
;
23527 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23528 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23529 CU_HEADERP first. */
23531 static const struct comp_unit_head
*
23532 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23533 struct dwarf2_per_cu_data
*per_cu
)
23535 const gdb_byte
*info_ptr
;
23538 return &per_cu
->cu
->header
;
23540 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23542 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23543 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23544 rcuh_kind::COMPILE
);
23549 /* Return the address size given in the compilation unit header for CU. */
23552 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
23554 struct comp_unit_head cu_header_local
;
23555 const struct comp_unit_head
*cu_headerp
;
23557 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23559 return cu_headerp
->addr_size
;
23562 /* Return the offset size given in the compilation unit header for CU. */
23565 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
23567 struct comp_unit_head cu_header_local
;
23568 const struct comp_unit_head
*cu_headerp
;
23570 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23572 return cu_headerp
->offset_size
;
23575 /* See its dwarf2loc.h declaration. */
23578 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
23580 struct comp_unit_head cu_header_local
;
23581 const struct comp_unit_head
*cu_headerp
;
23583 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23585 if (cu_headerp
->version
== 2)
23586 return cu_headerp
->addr_size
;
23588 return cu_headerp
->offset_size
;
23591 /* Return the text offset of the CU. The returned offset comes from
23592 this CU's objfile. If this objfile came from a separate debuginfo
23593 file, then the offset may be different from the corresponding
23594 offset in the parent objfile. */
23597 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
23599 struct objfile
*objfile
= per_cu
->objfile
;
23601 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23604 /* Return DWARF version number of PER_CU. */
23607 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
23609 return per_cu
->dwarf_version
;
23612 /* Locate the .debug_info compilation unit from CU's objfile which contains
23613 the DIE at OFFSET. Raises an error on failure. */
23615 static struct dwarf2_per_cu_data
*
23616 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23617 unsigned int offset_in_dwz
,
23618 struct objfile
*objfile
)
23620 struct dwarf2_per_cu_data
*this_cu
;
23622 const sect_offset
*cu_off
;
23625 high
= dwarf2_per_objfile
->n_comp_units
- 1;
23628 struct dwarf2_per_cu_data
*mid_cu
;
23629 int mid
= low
+ (high
- low
) / 2;
23631 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
23632 cu_off
= &mid_cu
->sect_off
;
23633 if (mid_cu
->is_dwz
> offset_in_dwz
23634 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
23639 gdb_assert (low
== high
);
23640 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
23641 cu_off
= &this_cu
->sect_off
;
23642 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
23644 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23645 error (_("Dwarf Error: could not find partial DIE containing "
23646 "offset 0x%x [in module %s]"),
23647 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
23649 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23651 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23655 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
23656 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
23657 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23658 error (_("invalid dwarf2 offset %u"), to_underlying (sect_off
));
23659 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23664 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23667 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
23669 memset (cu
, 0, sizeof (*cu
));
23671 cu
->per_cu
= per_cu
;
23672 cu
->objfile
= per_cu
->objfile
;
23673 obstack_init (&cu
->comp_unit_obstack
);
23676 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23679 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23680 enum language pretend_language
)
23682 struct attribute
*attr
;
23684 /* Set the language we're debugging. */
23685 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23687 set_cu_language (DW_UNSND (attr
), cu
);
23690 cu
->language
= pretend_language
;
23691 cu
->language_defn
= language_def (cu
->language
);
23694 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23697 /* Release one cached compilation unit, CU. We unlink it from the tree
23698 of compilation units, but we don't remove it from the read_in_chain;
23699 the caller is responsible for that.
23700 NOTE: DATA is a void * because this function is also used as a
23701 cleanup routine. */
23704 free_heap_comp_unit (void *data
)
23706 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
23708 gdb_assert (cu
->per_cu
!= NULL
);
23709 cu
->per_cu
->cu
= NULL
;
23712 obstack_free (&cu
->comp_unit_obstack
, NULL
);
23717 /* This cleanup function is passed the address of a dwarf2_cu on the stack
23718 when we're finished with it. We can't free the pointer itself, but be
23719 sure to unlink it from the cache. Also release any associated storage. */
23722 free_stack_comp_unit (void *data
)
23724 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
23726 gdb_assert (cu
->per_cu
!= NULL
);
23727 cu
->per_cu
->cu
= NULL
;
23730 obstack_free (&cu
->comp_unit_obstack
, NULL
);
23731 cu
->partial_dies
= NULL
;
23734 /* Free all cached compilation units. */
23737 free_cached_comp_units (void *data
)
23739 dwarf2_per_objfile
->free_cached_comp_units ();
23742 /* Increase the age counter on each cached compilation unit, and free
23743 any that are too old. */
23746 age_cached_comp_units (void)
23748 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23750 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23751 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23752 while (per_cu
!= NULL
)
23754 per_cu
->cu
->last_used
++;
23755 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23756 dwarf2_mark (per_cu
->cu
);
23757 per_cu
= per_cu
->cu
->read_in_chain
;
23760 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23761 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23762 while (per_cu
!= NULL
)
23764 struct dwarf2_per_cu_data
*next_cu
;
23766 next_cu
= per_cu
->cu
->read_in_chain
;
23768 if (!per_cu
->cu
->mark
)
23770 free_heap_comp_unit (per_cu
->cu
);
23771 *last_chain
= next_cu
;
23774 last_chain
= &per_cu
->cu
->read_in_chain
;
23780 /* Remove a single compilation unit from the cache. */
23783 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23785 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23787 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23788 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23789 while (per_cu
!= NULL
)
23791 struct dwarf2_per_cu_data
*next_cu
;
23793 next_cu
= per_cu
->cu
->read_in_chain
;
23795 if (per_cu
== target_per_cu
)
23797 free_heap_comp_unit (per_cu
->cu
);
23799 *last_chain
= next_cu
;
23803 last_chain
= &per_cu
->cu
->read_in_chain
;
23809 /* Release all extra memory associated with OBJFILE. */
23812 dwarf2_free_objfile (struct objfile
*objfile
)
23815 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23816 dwarf2_objfile_data_key
);
23818 if (dwarf2_per_objfile
== NULL
)
23821 dwarf2_per_objfile
->~dwarf2_per_objfile ();
23824 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23825 We store these in a hash table separate from the DIEs, and preserve them
23826 when the DIEs are flushed out of cache.
23828 The CU "per_cu" pointer is needed because offset alone is not enough to
23829 uniquely identify the type. A file may have multiple .debug_types sections,
23830 or the type may come from a DWO file. Furthermore, while it's more logical
23831 to use per_cu->section+offset, with Fission the section with the data is in
23832 the DWO file but we don't know that section at the point we need it.
23833 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23834 because we can enter the lookup routine, get_die_type_at_offset, from
23835 outside this file, and thus won't necessarily have PER_CU->cu.
23836 Fortunately, PER_CU is stable for the life of the objfile. */
23838 struct dwarf2_per_cu_offset_and_type
23840 const struct dwarf2_per_cu_data
*per_cu
;
23841 sect_offset sect_off
;
23845 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23848 per_cu_offset_and_type_hash (const void *item
)
23850 const struct dwarf2_per_cu_offset_and_type
*ofs
23851 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23853 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23856 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23859 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23861 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23862 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23863 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23864 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23866 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23867 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23870 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23871 table if necessary. For convenience, return TYPE.
23873 The DIEs reading must have careful ordering to:
23874 * Not cause infite loops trying to read in DIEs as a prerequisite for
23875 reading current DIE.
23876 * Not trying to dereference contents of still incompletely read in types
23877 while reading in other DIEs.
23878 * Enable referencing still incompletely read in types just by a pointer to
23879 the type without accessing its fields.
23881 Therefore caller should follow these rules:
23882 * Try to fetch any prerequisite types we may need to build this DIE type
23883 before building the type and calling set_die_type.
23884 * After building type call set_die_type for current DIE as soon as
23885 possible before fetching more types to complete the current type.
23886 * Make the type as complete as possible before fetching more types. */
23888 static struct type
*
23889 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23891 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23892 struct objfile
*objfile
= cu
->objfile
;
23893 struct attribute
*attr
;
23894 struct dynamic_prop prop
;
23896 /* For Ada types, make sure that the gnat-specific data is always
23897 initialized (if not already set). There are a few types where
23898 we should not be doing so, because the type-specific area is
23899 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23900 where the type-specific area is used to store the floatformat).
23901 But this is not a problem, because the gnat-specific information
23902 is actually not needed for these types. */
23903 if (need_gnat_info (cu
)
23904 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23905 && TYPE_CODE (type
) != TYPE_CODE_FLT
23906 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23907 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23908 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23909 && !HAVE_GNAT_AUX_INFO (type
))
23910 INIT_GNAT_SPECIFIC (type
);
23912 /* Read DW_AT_allocated and set in type. */
23913 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23914 if (attr_form_is_block (attr
))
23916 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23917 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
23919 else if (attr
!= NULL
)
23921 complaint (&symfile_complaints
,
23922 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
23923 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23924 to_underlying (die
->sect_off
));
23927 /* Read DW_AT_associated and set in type. */
23928 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23929 if (attr_form_is_block (attr
))
23931 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23932 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
23934 else if (attr
!= NULL
)
23936 complaint (&symfile_complaints
,
23937 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
23938 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23939 to_underlying (die
->sect_off
));
23942 /* Read DW_AT_data_location and set in type. */
23943 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23944 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23945 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
23947 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23949 dwarf2_per_objfile
->die_type_hash
=
23950 htab_create_alloc_ex (127,
23951 per_cu_offset_and_type_hash
,
23952 per_cu_offset_and_type_eq
,
23954 &objfile
->objfile_obstack
,
23955 hashtab_obstack_allocate
,
23956 dummy_obstack_deallocate
);
23959 ofs
.per_cu
= cu
->per_cu
;
23960 ofs
.sect_off
= die
->sect_off
;
23962 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23963 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
23965 complaint (&symfile_complaints
,
23966 _("A problem internal to GDB: DIE 0x%x has type already set"),
23967 to_underlying (die
->sect_off
));
23968 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23969 struct dwarf2_per_cu_offset_and_type
);
23974 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23975 or return NULL if the die does not have a saved type. */
23977 static struct type
*
23978 get_die_type_at_offset (sect_offset sect_off
,
23979 struct dwarf2_per_cu_data
*per_cu
)
23981 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23983 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23986 ofs
.per_cu
= per_cu
;
23987 ofs
.sect_off
= sect_off
;
23988 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23989 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
23996 /* Look up the type for DIE in CU in die_type_hash,
23997 or return NULL if DIE does not have a saved type. */
23999 static struct type
*
24000 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
24002 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
24005 /* Add a dependence relationship from CU to REF_PER_CU. */
24008 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
24009 struct dwarf2_per_cu_data
*ref_per_cu
)
24013 if (cu
->dependencies
== NULL
)
24015 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
24016 NULL
, &cu
->comp_unit_obstack
,
24017 hashtab_obstack_allocate
,
24018 dummy_obstack_deallocate
);
24020 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
24022 *slot
= ref_per_cu
;
24025 /* Subroutine of dwarf2_mark to pass to htab_traverse.
24026 Set the mark field in every compilation unit in the
24027 cache that we must keep because we are keeping CU. */
24030 dwarf2_mark_helper (void **slot
, void *data
)
24032 struct dwarf2_per_cu_data
*per_cu
;
24034 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
24036 /* cu->dependencies references may not yet have been ever read if QUIT aborts
24037 reading of the chain. As such dependencies remain valid it is not much
24038 useful to track and undo them during QUIT cleanups. */
24039 if (per_cu
->cu
== NULL
)
24042 if (per_cu
->cu
->mark
)
24044 per_cu
->cu
->mark
= 1;
24046 if (per_cu
->cu
->dependencies
!= NULL
)
24047 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
24052 /* Set the mark field in CU and in every other compilation unit in the
24053 cache that we must keep because we are keeping CU. */
24056 dwarf2_mark (struct dwarf2_cu
*cu
)
24061 if (cu
->dependencies
!= NULL
)
24062 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
24066 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
24070 per_cu
->cu
->mark
= 0;
24071 per_cu
= per_cu
->cu
->read_in_chain
;
24075 /* Trivial hash function for partial_die_info: the hash value of a DIE
24076 is its offset in .debug_info for this objfile. */
24079 partial_die_hash (const void *item
)
24081 const struct partial_die_info
*part_die
24082 = (const struct partial_die_info
*) item
;
24084 return to_underlying (part_die
->sect_off
);
24087 /* Trivial comparison function for partial_die_info structures: two DIEs
24088 are equal if they have the same offset. */
24091 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
24093 const struct partial_die_info
*part_die_lhs
24094 = (const struct partial_die_info
*) item_lhs
;
24095 const struct partial_die_info
*part_die_rhs
24096 = (const struct partial_die_info
*) item_rhs
;
24098 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
24101 static struct cmd_list_element
*set_dwarf_cmdlist
;
24102 static struct cmd_list_element
*show_dwarf_cmdlist
;
24105 set_dwarf_cmd (const char *args
, int from_tty
)
24107 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
24112 show_dwarf_cmd (const char *args
, int from_tty
)
24114 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
24117 /* Free data associated with OBJFILE, if necessary. */
24120 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
24122 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
24125 /* Make sure we don't accidentally use dwarf2_per_objfile while
24127 dwarf2_per_objfile
= NULL
;
24129 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
24130 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
24132 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
24133 VEC_free (dwarf2_per_cu_ptr
,
24134 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
24135 xfree (data
->all_type_units
);
24137 VEC_free (dwarf2_section_info_def
, data
->types
);
24139 if (data
->dwo_files
)
24140 free_dwo_files (data
->dwo_files
, objfile
);
24141 if (data
->dwp_file
)
24142 gdb_bfd_unref (data
->dwp_file
->dbfd
);
24144 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
24145 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
24147 if (data
->index_table
!= NULL
)
24148 data
->index_table
->~mapped_index ();
24152 /* The "save gdb-index" command. */
24154 /* In-memory buffer to prepare data to be written later to a file. */
24158 /* Copy DATA to the end of the buffer. */
24159 template<typename T
>
24160 void append_data (const T
&data
)
24162 std::copy (reinterpret_cast<const gdb_byte
*> (&data
),
24163 reinterpret_cast<const gdb_byte
*> (&data
+ 1),
24164 grow (sizeof (data
)));
24167 /* Copy CSTR (a zero-terminated string) to the end of buffer. The
24168 terminating zero is appended too. */
24169 void append_cstr0 (const char *cstr
)
24171 const size_t size
= strlen (cstr
) + 1;
24172 std::copy (cstr
, cstr
+ size
, grow (size
));
24175 /* Accept a host-format integer in VAL and append it to the buffer
24176 as a target-format integer which is LEN bytes long. */
24177 void append_uint (size_t len
, bfd_endian byte_order
, ULONGEST val
)
24179 ::store_unsigned_integer (grow (len
), len
, byte_order
, val
);
24182 /* Return the size of the buffer. */
24183 size_t size () const
24185 return m_vec
.size ();
24188 /* Write the buffer to FILE. */
24189 void file_write (FILE *file
) const
24191 if (::fwrite (m_vec
.data (), 1, m_vec
.size (), file
) != m_vec
.size ())
24192 error (_("couldn't write data to file"));
24196 /* Grow SIZE bytes at the end of the buffer. Returns a pointer to
24197 the start of the new block. */
24198 gdb_byte
*grow (size_t size
)
24200 m_vec
.resize (m_vec
.size () + size
);
24201 return &*m_vec
.end () - size
;
24204 gdb::byte_vector m_vec
;
24207 /* An entry in the symbol table. */
24208 struct symtab_index_entry
24210 /* The name of the symbol. */
24212 /* The offset of the name in the constant pool. */
24213 offset_type index_offset
;
24214 /* A sorted vector of the indices of all the CUs that hold an object
24216 std::vector
<offset_type
> cu_indices
;
24219 /* The symbol table. This is a power-of-2-sized hash table. */
24220 struct mapped_symtab
24224 data
.resize (1024);
24227 offset_type n_elements
= 0;
24228 std::vector
<symtab_index_entry
> data
;
24231 /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to
24234 Function is used only during write_hash_table so no index format backward
24235 compatibility is needed. */
24237 static symtab_index_entry
&
24238 find_slot (struct mapped_symtab
*symtab
, const char *name
)
24240 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
24242 index
= hash
& (symtab
->data
.size () - 1);
24243 step
= ((hash
* 17) & (symtab
->data
.size () - 1)) | 1;
24247 if (symtab
->data
[index
].name
== NULL
24248 || strcmp (name
, symtab
->data
[index
].name
) == 0)
24249 return symtab
->data
[index
];
24250 index
= (index
+ step
) & (symtab
->data
.size () - 1);
24254 /* Expand SYMTAB's hash table. */
24257 hash_expand (struct mapped_symtab
*symtab
)
24259 auto old_entries
= std::move (symtab
->data
);
24261 symtab
->data
.clear ();
24262 symtab
->data
.resize (old_entries
.size () * 2);
24264 for (auto &it
: old_entries
)
24265 if (it
.name
!= NULL
)
24267 auto &ref
= find_slot (symtab
, it
.name
);
24268 ref
= std::move (it
);
24272 /* Add an entry to SYMTAB. NAME is the name of the symbol.
24273 CU_INDEX is the index of the CU in which the symbol appears.
24274 IS_STATIC is one if the symbol is static, otherwise zero (global). */
24277 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
24278 int is_static
, gdb_index_symbol_kind kind
,
24279 offset_type cu_index
)
24281 offset_type cu_index_and_attrs
;
24283 ++symtab
->n_elements
;
24284 if (4 * symtab
->n_elements
/ 3 >= symtab
->data
.size ())
24285 hash_expand (symtab
);
24287 symtab_index_entry
&slot
= find_slot (symtab
, name
);
24288 if (slot
.name
== NULL
)
24291 /* index_offset is set later. */
24294 cu_index_and_attrs
= 0;
24295 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
24296 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
24297 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
24299 /* We don't want to record an index value twice as we want to avoid the
24301 We process all global symbols and then all static symbols
24302 (which would allow us to avoid the duplication by only having to check
24303 the last entry pushed), but a symbol could have multiple kinds in one CU.
24304 To keep things simple we don't worry about the duplication here and
24305 sort and uniqufy the list after we've processed all symbols. */
24306 slot
.cu_indices
.push_back (cu_index_and_attrs
);
24309 /* Sort and remove duplicates of all symbols' cu_indices lists. */
24312 uniquify_cu_indices (struct mapped_symtab
*symtab
)
24314 for (auto &entry
: symtab
->data
)
24316 if (entry
.name
!= NULL
&& !entry
.cu_indices
.empty ())
24318 auto &cu_indices
= entry
.cu_indices
;
24319 std::sort (cu_indices
.begin (), cu_indices
.end ());
24320 auto from
= std::unique (cu_indices
.begin (), cu_indices
.end ());
24321 cu_indices
.erase (from
, cu_indices
.end ());
24326 /* A form of 'const char *' suitable for container keys. Only the
24327 pointer is stored. The strings themselves are compared, not the
24332 c_str_view (const char *cstr
)
24336 bool operator== (const c_str_view
&other
) const
24338 return strcmp (m_cstr
, other
.m_cstr
) == 0;
24342 friend class c_str_view_hasher
;
24343 const char *const m_cstr
;
24346 /* A std::unordered_map::hasher for c_str_view that uses the right
24347 hash function for strings in a mapped index. */
24348 class c_str_view_hasher
24351 size_t operator () (const c_str_view
&x
) const
24353 return mapped_index_string_hash (INT_MAX
, x
.m_cstr
);
24357 /* A std::unordered_map::hasher for std::vector<>. */
24358 template<typename T
>
24359 class vector_hasher
24362 size_t operator () (const std::vector
<T
> &key
) const
24364 return iterative_hash (key
.data (),
24365 sizeof (key
.front ()) * key
.size (), 0);
24369 /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with
24370 constant pool entries going into the data buffer CPOOL. */
24373 write_hash_table (mapped_symtab
*symtab
, data_buf
&output
, data_buf
&cpool
)
24376 /* Elements are sorted vectors of the indices of all the CUs that
24377 hold an object of this name. */
24378 std::unordered_map
<std::vector
<offset_type
>, offset_type
,
24379 vector_hasher
<offset_type
>>
24382 /* We add all the index vectors to the constant pool first, to
24383 ensure alignment is ok. */
24384 for (symtab_index_entry
&entry
: symtab
->data
)
24386 if (entry
.name
== NULL
)
24388 gdb_assert (entry
.index_offset
== 0);
24390 /* Finding before inserting is faster than always trying to
24391 insert, because inserting always allocates a node, does the
24392 lookup, and then destroys the new node if another node
24393 already had the same key. C++17 try_emplace will avoid
24396 = symbol_hash_table
.find (entry
.cu_indices
);
24397 if (found
!= symbol_hash_table
.end ())
24399 entry
.index_offset
= found
->second
;
24403 symbol_hash_table
.emplace (entry
.cu_indices
, cpool
.size ());
24404 entry
.index_offset
= cpool
.size ();
24405 cpool
.append_data (MAYBE_SWAP (entry
.cu_indices
.size ()));
24406 for (const auto index
: entry
.cu_indices
)
24407 cpool
.append_data (MAYBE_SWAP (index
));
24411 /* Now write out the hash table. */
24412 std::unordered_map
<c_str_view
, offset_type
, c_str_view_hasher
> str_table
;
24413 for (const auto &entry
: symtab
->data
)
24415 offset_type str_off
, vec_off
;
24417 if (entry
.name
!= NULL
)
24419 const auto insertpair
= str_table
.emplace (entry
.name
, cpool
.size ());
24420 if (insertpair
.second
)
24421 cpool
.append_cstr0 (entry
.name
);
24422 str_off
= insertpair
.first
->second
;
24423 vec_off
= entry
.index_offset
;
24427 /* While 0 is a valid constant pool index, it is not valid
24428 to have 0 for both offsets. */
24433 output
.append_data (MAYBE_SWAP (str_off
));
24434 output
.append_data (MAYBE_SWAP (vec_off
));
24438 typedef std::unordered_map
<partial_symtab
*, unsigned int> psym_index_map
;
24440 /* Helper struct for building the address table. */
24441 struct addrmap_index_data
24443 addrmap_index_data (data_buf
&addr_vec_
, psym_index_map
&cu_index_htab_
)
24444 : addr_vec (addr_vec_
), cu_index_htab (cu_index_htab_
)
24447 struct objfile
*objfile
;
24448 data_buf
&addr_vec
;
24449 psym_index_map
&cu_index_htab
;
24451 /* Non-zero if the previous_* fields are valid.
24452 We can't write an entry until we see the next entry (since it is only then
24453 that we know the end of the entry). */
24454 int previous_valid
;
24455 /* Index of the CU in the table of all CUs in the index file. */
24456 unsigned int previous_cu_index
;
24457 /* Start address of the CU. */
24458 CORE_ADDR previous_cu_start
;
24461 /* Write an address entry to ADDR_VEC. */
24464 add_address_entry (struct objfile
*objfile
, data_buf
&addr_vec
,
24465 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
24467 CORE_ADDR baseaddr
;
24469 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24471 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
24472 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
24473 addr_vec
.append_data (MAYBE_SWAP (cu_index
));
24476 /* Worker function for traversing an addrmap to build the address table. */
24479 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
24481 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
24482 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
24484 if (data
->previous_valid
)
24485 add_address_entry (data
->objfile
, data
->addr_vec
,
24486 data
->previous_cu_start
, start_addr
,
24487 data
->previous_cu_index
);
24489 data
->previous_cu_start
= start_addr
;
24492 const auto it
= data
->cu_index_htab
.find (pst
);
24493 gdb_assert (it
!= data
->cu_index_htab
.cend ());
24494 data
->previous_cu_index
= it
->second
;
24495 data
->previous_valid
= 1;
24498 data
->previous_valid
= 0;
24503 /* Write OBJFILE's address map to ADDR_VEC.
24504 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
24505 in the index file. */
24508 write_address_map (struct objfile
*objfile
, data_buf
&addr_vec
,
24509 psym_index_map
&cu_index_htab
)
24511 struct addrmap_index_data
addrmap_index_data (addr_vec
, cu_index_htab
);
24513 /* When writing the address table, we have to cope with the fact that
24514 the addrmap iterator only provides the start of a region; we have to
24515 wait until the next invocation to get the start of the next region. */
24517 addrmap_index_data
.objfile
= objfile
;
24518 addrmap_index_data
.previous_valid
= 0;
24520 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
24521 &addrmap_index_data
);
24523 /* It's highly unlikely the last entry (end address = 0xff...ff)
24524 is valid, but we should still handle it.
24525 The end address is recorded as the start of the next region, but that
24526 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
24528 if (addrmap_index_data
.previous_valid
)
24529 add_address_entry (objfile
, addr_vec
,
24530 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
24531 addrmap_index_data
.previous_cu_index
);
24534 /* Return the symbol kind of PSYM. */
24536 static gdb_index_symbol_kind
24537 symbol_kind (struct partial_symbol
*psym
)
24539 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
24540 enum address_class aclass
= PSYMBOL_CLASS (psym
);
24548 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
24550 return GDB_INDEX_SYMBOL_KIND_TYPE
;
24552 case LOC_CONST_BYTES
:
24553 case LOC_OPTIMIZED_OUT
:
24555 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
24557 /* Note: It's currently impossible to recognize psyms as enum values
24558 short of reading the type info. For now punt. */
24559 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
24561 /* There are other LOC_FOO values that one might want to classify
24562 as variables, but dwarf2read.c doesn't currently use them. */
24563 return GDB_INDEX_SYMBOL_KIND_OTHER
;
24565 case STRUCT_DOMAIN
:
24566 return GDB_INDEX_SYMBOL_KIND_TYPE
;
24568 return GDB_INDEX_SYMBOL_KIND_OTHER
;
24572 /* Add a list of partial symbols to SYMTAB. */
24575 write_psymbols (struct mapped_symtab
*symtab
,
24576 std::unordered_set
<partial_symbol
*> &psyms_seen
,
24577 struct partial_symbol
**psymp
,
24579 offset_type cu_index
,
24582 for (; count
-- > 0; ++psymp
)
24584 struct partial_symbol
*psym
= *psymp
;
24586 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
24587 error (_("Ada is not currently supported by the index"));
24589 /* Only add a given psymbol once. */
24590 if (psyms_seen
.insert (psym
).second
)
24592 gdb_index_symbol_kind kind
= symbol_kind (psym
);
24594 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
24595 is_static
, kind
, cu_index
);
24600 /* A helper struct used when iterating over debug_types. */
24601 struct signatured_type_index_data
24603 signatured_type_index_data (data_buf
&types_list_
,
24604 std::unordered_set
<partial_symbol
*> &psyms_seen_
)
24605 : types_list (types_list_
), psyms_seen (psyms_seen_
)
24608 struct objfile
*objfile
;
24609 struct mapped_symtab
*symtab
;
24610 data_buf
&types_list
;
24611 std::unordered_set
<partial_symbol
*> &psyms_seen
;
24615 /* A helper function that writes a single signatured_type to an
24619 write_one_signatured_type (void **slot
, void *d
)
24621 struct signatured_type_index_data
*info
24622 = (struct signatured_type_index_data
*) d
;
24623 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
24624 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
24626 write_psymbols (info
->symtab
,
24628 &info
->objfile
->global_psymbols
[psymtab
->globals_offset
],
24629 psymtab
->n_global_syms
, info
->cu_index
,
24631 write_psymbols (info
->symtab
,
24633 &info
->objfile
->static_psymbols
[psymtab
->statics_offset
],
24634 psymtab
->n_static_syms
, info
->cu_index
,
24637 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24638 to_underlying (entry
->per_cu
.sect_off
));
24639 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24640 to_underlying (entry
->type_offset_in_tu
));
24641 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
, entry
->signature
);
24648 /* Recurse into all "included" dependencies and count their symbols as
24649 if they appeared in this psymtab. */
24652 recursively_count_psymbols (struct partial_symtab
*psymtab
,
24653 size_t &psyms_seen
)
24655 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
24656 if (psymtab
->dependencies
[i
]->user
!= NULL
)
24657 recursively_count_psymbols (psymtab
->dependencies
[i
],
24660 psyms_seen
+= psymtab
->n_global_syms
;
24661 psyms_seen
+= psymtab
->n_static_syms
;
24664 /* Recurse into all "included" dependencies and write their symbols as
24665 if they appeared in this psymtab. */
24668 recursively_write_psymbols (struct objfile
*objfile
,
24669 struct partial_symtab
*psymtab
,
24670 struct mapped_symtab
*symtab
,
24671 std::unordered_set
<partial_symbol
*> &psyms_seen
,
24672 offset_type cu_index
)
24676 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
24677 if (psymtab
->dependencies
[i
]->user
!= NULL
)
24678 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
24679 symtab
, psyms_seen
, cu_index
);
24681 write_psymbols (symtab
,
24683 &objfile
->global_psymbols
[psymtab
->globals_offset
],
24684 psymtab
->n_global_syms
, cu_index
,
24686 write_psymbols (symtab
,
24688 &objfile
->static_psymbols
[psymtab
->statics_offset
],
24689 psymtab
->n_static_syms
, cu_index
,
24693 /* Create an index file for OBJFILE in the directory DIR. */
24696 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
24698 if (dwarf2_per_objfile
->using_index
)
24699 error (_("Cannot use an index to create the index"));
24701 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
24702 error (_("Cannot make an index when the file has multiple .debug_types sections"));
24704 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
24708 if (stat (objfile_name (objfile
), &st
) < 0)
24709 perror_with_name (objfile_name (objfile
));
24711 std::string
filename (std::string (dir
) + SLASH_STRING
24712 + lbasename (objfile_name (objfile
)) + INDEX_SUFFIX
);
24714 FILE *out_file
= gdb_fopen_cloexec (filename
.c_str (), "wb").release ();
24716 error (_("Can't open `%s' for writing"), filename
.c_str ());
24718 /* Order matters here; we want FILE to be closed before FILENAME is
24719 unlinked, because on MS-Windows one cannot delete a file that is
24720 still open. (Don't call anything here that might throw until
24721 file_closer is created.) */
24722 gdb::unlinker
unlink_file (filename
.c_str ());
24723 gdb_file_up
close_out_file (out_file
);
24725 mapped_symtab symtab
;
24728 /* While we're scanning CU's create a table that maps a psymtab pointer
24729 (which is what addrmap records) to its index (which is what is recorded
24730 in the index file). This will later be needed to write the address
24732 psym_index_map cu_index_htab
;
24733 cu_index_htab
.reserve (dwarf2_per_objfile
->n_comp_units
);
24735 /* The CU list is already sorted, so we don't need to do additional
24736 work here. Also, the debug_types entries do not appear in
24737 all_comp_units, but only in their own hash table. */
24739 /* The psyms_seen set is potentially going to be largish (~40k
24740 elements when indexing a -g3 build of GDB itself). Estimate the
24741 number of elements in order to avoid too many rehashes, which
24742 require rebuilding buckets and thus many trips to
24744 size_t psyms_count
= 0;
24745 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
24747 struct dwarf2_per_cu_data
*per_cu
24748 = dwarf2_per_objfile
->all_comp_units
[i
];
24749 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
24751 if (psymtab
!= NULL
&& psymtab
->user
== NULL
)
24752 recursively_count_psymbols (psymtab
, psyms_count
);
24754 /* Generating an index for gdb itself shows a ratio of
24755 TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */
24756 std::unordered_set
<partial_symbol
*> psyms_seen (psyms_count
/ 4);
24757 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
24759 struct dwarf2_per_cu_data
*per_cu
24760 = dwarf2_per_objfile
->all_comp_units
[i
];
24761 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
24763 /* CU of a shared file from 'dwz -m' may be unused by this main file.
24764 It may be referenced from a local scope but in such case it does not
24765 need to be present in .gdb_index. */
24766 if (psymtab
== NULL
)
24769 if (psymtab
->user
== NULL
)
24770 recursively_write_psymbols (objfile
, psymtab
, &symtab
,
24773 const auto insertpair
= cu_index_htab
.emplace (psymtab
, i
);
24774 gdb_assert (insertpair
.second
);
24776 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24777 to_underlying (per_cu
->sect_off
));
24778 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
24781 /* Dump the address map. */
24783 write_address_map (objfile
, addr_vec
, cu_index_htab
);
24785 /* Write out the .debug_type entries, if any. */
24786 data_buf types_cu_list
;
24787 if (dwarf2_per_objfile
->signatured_types
)
24789 signatured_type_index_data
sig_data (types_cu_list
,
24792 sig_data
.objfile
= objfile
;
24793 sig_data
.symtab
= &symtab
;
24794 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
24795 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
24796 write_one_signatured_type
, &sig_data
);
24799 /* Now that we've processed all symbols we can shrink their cu_indices
24801 uniquify_cu_indices (&symtab
);
24803 data_buf symtab_vec
, constant_pool
;
24804 write_hash_table (&symtab
, symtab_vec
, constant_pool
);
24807 const offset_type size_of_contents
= 6 * sizeof (offset_type
);
24808 offset_type total_len
= size_of_contents
;
24810 /* The version number. */
24811 contents
.append_data (MAYBE_SWAP (8));
24813 /* The offset of the CU list from the start of the file. */
24814 contents
.append_data (MAYBE_SWAP (total_len
));
24815 total_len
+= cu_list
.size ();
24817 /* The offset of the types CU list from the start of the file. */
24818 contents
.append_data (MAYBE_SWAP (total_len
));
24819 total_len
+= types_cu_list
.size ();
24821 /* The offset of the address table from the start of the file. */
24822 contents
.append_data (MAYBE_SWAP (total_len
));
24823 total_len
+= addr_vec
.size ();
24825 /* The offset of the symbol table from the start of the file. */
24826 contents
.append_data (MAYBE_SWAP (total_len
));
24827 total_len
+= symtab_vec
.size ();
24829 /* The offset of the constant pool from the start of the file. */
24830 contents
.append_data (MAYBE_SWAP (total_len
));
24831 total_len
+= constant_pool
.size ();
24833 gdb_assert (contents
.size () == size_of_contents
);
24835 contents
.file_write (out_file
);
24836 cu_list
.file_write (out_file
);
24837 types_cu_list
.file_write (out_file
);
24838 addr_vec
.file_write (out_file
);
24839 symtab_vec
.file_write (out_file
);
24840 constant_pool
.file_write (out_file
);
24842 /* We want to keep the file. */
24843 unlink_file
.keep ();
24846 /* Implementation of the `save gdb-index' command.
24848 Note that the file format used by this command is documented in the
24849 GDB manual. Any changes here must be documented there. */
24852 save_gdb_index_command (const char *arg
, int from_tty
)
24854 struct objfile
*objfile
;
24857 error (_("usage: save gdb-index DIRECTORY"));
24859 ALL_OBJFILES (objfile
)
24863 /* If the objfile does not correspond to an actual file, skip it. */
24864 if (stat (objfile_name (objfile
), &st
) < 0)
24868 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
24869 dwarf2_objfile_data_key
);
24870 if (dwarf2_per_objfile
)
24875 write_psymtabs_to_index (objfile
, arg
);
24877 CATCH (except
, RETURN_MASK_ERROR
)
24879 exception_fprintf (gdb_stderr
, except
,
24880 _("Error while writing index for `%s': "),
24881 objfile_name (objfile
));
24890 int dwarf_always_disassemble
;
24893 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
24894 struct cmd_list_element
*c
, const char *value
)
24896 fprintf_filtered (file
,
24897 _("Whether to always disassemble "
24898 "DWARF expressions is %s.\n"),
24903 show_check_physname (struct ui_file
*file
, int from_tty
,
24904 struct cmd_list_element
*c
, const char *value
)
24906 fprintf_filtered (file
,
24907 _("Whether to check \"physname\" is %s.\n"),
24912 _initialize_dwarf2_read (void)
24914 struct cmd_list_element
*c
;
24916 dwarf2_objfile_data_key
24917 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
24919 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
24920 Set DWARF specific variables.\n\
24921 Configure DWARF variables such as the cache size"),
24922 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24923 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24925 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
24926 Show DWARF specific variables\n\
24927 Show DWARF variables such as the cache size"),
24928 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24929 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24931 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24932 &dwarf_max_cache_age
, _("\
24933 Set the upper bound on the age of cached DWARF compilation units."), _("\
24934 Show the upper bound on the age of cached DWARF compilation units."), _("\
24935 A higher limit means that cached compilation units will be stored\n\
24936 in memory longer, and more total memory will be used. Zero disables\n\
24937 caching, which can slow down startup."),
24939 show_dwarf_max_cache_age
,
24940 &set_dwarf_cmdlist
,
24941 &show_dwarf_cmdlist
);
24943 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
24944 &dwarf_always_disassemble
, _("\
24945 Set whether `info address' always disassembles DWARF expressions."), _("\
24946 Show whether `info address' always disassembles DWARF expressions."), _("\
24947 When enabled, DWARF expressions are always printed in an assembly-like\n\
24948 syntax. When disabled, expressions will be printed in a more\n\
24949 conversational style, when possible."),
24951 show_dwarf_always_disassemble
,
24952 &set_dwarf_cmdlist
,
24953 &show_dwarf_cmdlist
);
24955 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24956 Set debugging of the DWARF reader."), _("\
24957 Show debugging of the DWARF reader."), _("\
24958 When enabled (non-zero), debugging messages are printed during DWARF\n\
24959 reading and symtab expansion. A value of 1 (one) provides basic\n\
24960 information. A value greater than 1 provides more verbose information."),
24963 &setdebuglist
, &showdebuglist
);
24965 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24966 Set debugging of the DWARF DIE reader."), _("\
24967 Show debugging of the DWARF DIE reader."), _("\
24968 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24969 The value is the maximum depth to print."),
24972 &setdebuglist
, &showdebuglist
);
24974 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24975 Set debugging of the dwarf line reader."), _("\
24976 Show debugging of the dwarf line reader."), _("\
24977 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24978 A value of 1 (one) provides basic information.\n\
24979 A value greater than 1 provides more verbose information."),
24982 &setdebuglist
, &showdebuglist
);
24984 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24985 Set cross-checking of \"physname\" code against demangler."), _("\
24986 Show cross-checking of \"physname\" code against demangler."), _("\
24987 When enabled, GDB's internal \"physname\" code is checked against\n\
24989 NULL
, show_check_physname
,
24990 &setdebuglist
, &showdebuglist
);
24992 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24993 no_class
, &use_deprecated_index_sections
, _("\
24994 Set whether to use deprecated gdb_index sections."), _("\
24995 Show whether to use deprecated gdb_index sections."), _("\
24996 When enabled, deprecated .gdb_index sections are used anyway.\n\
24997 Normally they are ignored either because of a missing feature or\n\
24998 performance issue.\n\
24999 Warning: This option must be enabled before gdb reads the file."),
25002 &setlist
, &showlist
);
25004 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
25006 Save a gdb-index file.\n\
25007 Usage: save gdb-index DIRECTORY"),
25009 set_cmd_completer (c
, filename_completer
);
25011 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25012 &dwarf2_locexpr_funcs
);
25013 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25014 &dwarf2_loclist_funcs
);
25016 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25017 &dwarf2_block_frame_base_locexpr_funcs
);
25018 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25019 &dwarf2_block_frame_base_loclist_funcs
);
25022 selftests::register_test ("dw2_expand_symtabs_matching",
25023 selftests::dw2_expand_symtabs_matching::run_test
);