1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2012 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. */
39 #include "gdb-demangle.h"
40 #include "expression.h"
41 #include "filenames.h" /* for DOSish file names */
44 #include "complaints.h"
46 #include "dwarf2expr.h"
47 #include "dwarf2loc.h"
48 #include "cp-support.h"
54 #include "typeprint.h"
57 #include "exceptions.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
68 #include "gdb_string.h"
69 #include "gdb_assert.h"
70 #include <sys/types.h>
77 #define MAP_FAILED ((void *) -1)
81 typedef struct symbol
*symbolp
;
84 /* When non-zero, dump DIEs after they are read in. */
85 static int dwarf2_die_debug
= 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname
= 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 int use_deprecated_index_sections
= 0;
95 /* When set, the file that we're processing is known to have debugging
96 info for C++ namespaces. GCC 3.3.x did not produce this information,
97 but later versions do. */
99 static int processing_has_namespace_info
;
101 static const struct objfile_data
*dwarf2_objfile_data_key
;
103 struct dwarf2_section_info
108 /* Not NULL if the section was actually mmapped. */
110 /* Page aligned size of mmapped area. */
111 bfd_size_type map_len
;
112 /* True if we have tried to read this section. */
116 typedef struct dwarf2_section_info dwarf2_section_info_def
;
117 DEF_VEC_O (dwarf2_section_info_def
);
119 /* All offsets in the index are of this type. It must be
120 architecture-independent. */
121 typedef uint32_t offset_type
;
123 DEF_VEC_I (offset_type
);
125 /* A description of the mapped index. The file format is described in
126 a comment by the code that writes the index. */
129 /* Index data format version. */
132 /* The total length of the buffer. */
135 /* A pointer to the address table data. */
136 const gdb_byte
*address_table
;
138 /* Size of the address table data in bytes. */
139 offset_type address_table_size
;
141 /* The symbol table, implemented as a hash table. */
142 const offset_type
*symbol_table
;
144 /* Size in slots, each slot is 2 offset_types. */
145 offset_type symbol_table_slots
;
147 /* A pointer to the constant pool. */
148 const char *constant_pool
;
151 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
152 DEF_VEC_P (dwarf2_per_cu_ptr
);
154 /* Collection of data recorded per objfile.
155 This hangs off of dwarf2_objfile_data_key. */
157 struct dwarf2_per_objfile
159 struct dwarf2_section_info info
;
160 struct dwarf2_section_info abbrev
;
161 struct dwarf2_section_info line
;
162 struct dwarf2_section_info loc
;
163 struct dwarf2_section_info macinfo
;
164 struct dwarf2_section_info macro
;
165 struct dwarf2_section_info str
;
166 struct dwarf2_section_info ranges
;
167 struct dwarf2_section_info addr
;
168 struct dwarf2_section_info frame
;
169 struct dwarf2_section_info eh_frame
;
170 struct dwarf2_section_info gdb_index
;
172 VEC (dwarf2_section_info_def
) *types
;
175 struct objfile
*objfile
;
177 /* Table of all the compilation units. This is used to locate
178 the target compilation unit of a particular reference. */
179 struct dwarf2_per_cu_data
**all_comp_units
;
181 /* The number of compilation units in ALL_COMP_UNITS. */
184 /* The number of .debug_types-related CUs. */
187 /* The .debug_types-related CUs (TUs). */
188 struct dwarf2_per_cu_data
**all_type_units
;
190 /* A chain of compilation units that are currently read in, so that
191 they can be freed later. */
192 struct dwarf2_per_cu_data
*read_in_chain
;
194 /* A table mapping .debug_types signatures to its signatured_type entry.
195 This is NULL if the .debug_types section hasn't been read in yet. */
196 htab_t signatured_types
;
198 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
199 This is NULL if the table hasn't been allocated yet. */
202 /* A flag indicating wether this objfile has a section loaded at a
204 int has_section_at_zero
;
206 /* True if we are using the mapped index,
207 or we are faking it for OBJF_READNOW's sake. */
208 unsigned char using_index
;
210 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
211 struct mapped_index
*index_table
;
213 /* When using index_table, this keeps track of all quick_file_names entries.
214 TUs can share line table entries with CUs or other TUs, and there can be
215 a lot more TUs than unique line tables, so we maintain a separate table
216 of all line table entries to support the sharing. */
217 htab_t quick_file_names_table
;
219 /* Set during partial symbol reading, to prevent queueing of full
221 int reading_partial_symbols
;
223 /* Table mapping type DIEs to their struct type *.
224 This is NULL if not allocated yet.
225 The mapping is done via (CU/TU signature + DIE offset) -> type. */
226 htab_t die_type_hash
;
228 /* The CUs we recently read. */
229 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
232 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
234 /* Default names of the debugging sections. */
236 /* Note that if the debugging section has been compressed, it might
237 have a name like .zdebug_info. */
239 static const struct dwarf2_debug_sections dwarf2_elf_names
=
241 { ".debug_info", ".zdebug_info" },
242 { ".debug_abbrev", ".zdebug_abbrev" },
243 { ".debug_line", ".zdebug_line" },
244 { ".debug_loc", ".zdebug_loc" },
245 { ".debug_macinfo", ".zdebug_macinfo" },
246 { ".debug_macro", ".zdebug_macro" },
247 { ".debug_str", ".zdebug_str" },
248 { ".debug_ranges", ".zdebug_ranges" },
249 { ".debug_types", ".zdebug_types" },
250 { ".debug_addr", ".zdebug_addr" },
251 { ".debug_frame", ".zdebug_frame" },
252 { ".eh_frame", NULL
},
253 { ".gdb_index", ".zgdb_index" },
257 /* List of DWO sections. */
259 static const struct dwo_section_names
261 struct dwarf2_section_names abbrev_dwo
;
262 struct dwarf2_section_names info_dwo
;
263 struct dwarf2_section_names line_dwo
;
264 struct dwarf2_section_names loc_dwo
;
265 struct dwarf2_section_names str_dwo
;
266 struct dwarf2_section_names str_offsets_dwo
;
267 struct dwarf2_section_names types_dwo
;
271 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
272 { ".debug_info.dwo", ".zdebug_info.dwo" },
273 { ".debug_line.dwo", ".zdebug_line.dwo" },
274 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
275 { ".debug_str.dwo", ".zdebug_str.dwo" },
276 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
277 { ".debug_types.dwo", ".zdebug_types.dwo" },
280 /* local data types */
282 /* We hold several abbreviation tables in memory at the same time. */
283 #ifndef ABBREV_HASH_SIZE
284 #define ABBREV_HASH_SIZE 121
287 /* The data in a compilation unit header, after target2host
288 translation, looks like this. */
289 struct comp_unit_head
293 unsigned char addr_size
;
294 unsigned char signed_addr_p
;
295 sect_offset abbrev_offset
;
297 /* Size of file offsets; either 4 or 8. */
298 unsigned int offset_size
;
300 /* Size of the length field; either 4 or 12. */
301 unsigned int initial_length_size
;
303 /* Offset to the first byte of this compilation unit header in the
304 .debug_info section, for resolving relative reference dies. */
307 /* Offset to first die in this cu from the start of the cu.
308 This will be the first byte following the compilation unit header. */
309 cu_offset first_die_offset
;
312 /* Type used for delaying computation of method physnames.
313 See comments for compute_delayed_physnames. */
314 struct delayed_method_info
316 /* The type to which the method is attached, i.e., its parent class. */
319 /* The index of the method in the type's function fieldlists. */
322 /* The index of the method in the fieldlist. */
325 /* The name of the DIE. */
328 /* The DIE associated with this method. */
329 struct die_info
*die
;
332 typedef struct delayed_method_info delayed_method_info
;
333 DEF_VEC_O (delayed_method_info
);
335 /* Internal state when decoding a particular compilation unit. */
338 /* The objfile containing this compilation unit. */
339 struct objfile
*objfile
;
341 /* The header of the compilation unit. */
342 struct comp_unit_head header
;
344 /* Base address of this compilation unit. */
345 CORE_ADDR base_address
;
347 /* Non-zero if base_address has been set. */
350 /* The language we are debugging. */
351 enum language language
;
352 const struct language_defn
*language_defn
;
354 const char *producer
;
356 /* The generic symbol table building routines have separate lists for
357 file scope symbols and all all other scopes (local scopes). So
358 we need to select the right one to pass to add_symbol_to_list().
359 We do it by keeping a pointer to the correct list in list_in_scope.
361 FIXME: The original dwarf code just treated the file scope as the
362 first local scope, and all other local scopes as nested local
363 scopes, and worked fine. Check to see if we really need to
364 distinguish these in buildsym.c. */
365 struct pending
**list_in_scope
;
367 /* DWARF abbreviation table associated with this compilation unit. */
368 struct abbrev_info
**dwarf2_abbrevs
;
370 /* Storage for the abbrev table. */
371 struct obstack abbrev_obstack
;
373 /* Hash table holding all the loaded partial DIEs
374 with partial_die->offset.SECT_OFF as hash. */
377 /* Storage for things with the same lifetime as this read-in compilation
378 unit, including partial DIEs. */
379 struct obstack comp_unit_obstack
;
381 /* When multiple dwarf2_cu structures are living in memory, this field
382 chains them all together, so that they can be released efficiently.
383 We will probably also want a generation counter so that most-recently-used
384 compilation units are cached... */
385 struct dwarf2_per_cu_data
*read_in_chain
;
387 /* Backchain to our per_cu entry if the tree has been built. */
388 struct dwarf2_per_cu_data
*per_cu
;
390 /* How many compilation units ago was this CU last referenced? */
393 /* A hash table of DIE cu_offset for following references with
394 die_info->offset.sect_off as hash. */
397 /* Full DIEs if read in. */
398 struct die_info
*dies
;
400 /* A set of pointers to dwarf2_per_cu_data objects for compilation
401 units referenced by this one. Only set during full symbol processing;
402 partial symbol tables do not have dependencies. */
405 /* Header data from the line table, during full symbol processing. */
406 struct line_header
*line_header
;
408 /* A list of methods which need to have physnames computed
409 after all type information has been read. */
410 VEC (delayed_method_info
) *method_list
;
412 /* To be copied to symtab->call_site_htab. */
413 htab_t call_site_htab
;
415 /* Non-NULL if this CU came from a DWO file.
416 There is an invariant here that is important to remember:
417 Except for attributes copied from the top level DIE in the "main"
418 (or "stub") file in preparation for reading the DWO file
419 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
420 Either there isn't a DWO file (in which case this is NULL and the point
421 is moot), or there is and either we're not going to read it (in which
422 case this is NULL) or there is and we are reading it (in which case this
424 struct dwo_unit
*dwo_unit
;
426 /* The DW_AT_addr_base attribute if present, zero otherwise
427 (zero is a valid value though).
428 Note this value comes from the stub CU/TU's DIE. */
431 /* Mark used when releasing cached dies. */
432 unsigned int mark
: 1;
434 /* This CU references .debug_loc. See the symtab->locations_valid field.
435 This test is imperfect as there may exist optimized debug code not using
436 any location list and still facing inlining issues if handled as
437 unoptimized code. For a future better test see GCC PR other/32998. */
438 unsigned int has_loclist
: 1;
440 /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
441 CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
442 are valid. This information is cached because profiling CU expansion
443 showed excessive time spent in producer_is_gxx_lt_4_6. */
444 unsigned int checked_producer
: 1;
445 unsigned int producer_is_gxx_lt_4_6
: 1;
446 unsigned int producer_is_icc
: 1;
448 /* Non-zero if DW_AT_addr_base was found.
449 Used when processing DWO files. */
450 unsigned int have_addr_base
: 1;
453 /* Persistent data held for a compilation unit, even when not
454 processing it. We put a pointer to this structure in the
455 read_symtab_private field of the psymtab. */
457 struct dwarf2_per_cu_data
459 /* The start offset and length of this compilation unit. 2**29-1
460 bytes should suffice to store the length of any compilation unit
461 - if it doesn't, GDB will fall over anyway.
462 NOTE: Unlike comp_unit_head.length, this length includes
464 If the DIE refers to a DWO file, this is always of the original die,
467 unsigned int length
: 29;
469 /* Flag indicating this compilation unit will be read in before
470 any of the current compilation units are processed. */
471 unsigned int queued
: 1;
473 /* This flag will be set when reading partial DIEs if we need to load
474 absolutely all DIEs for this compilation unit, instead of just the ones
475 we think are interesting. It gets set if we look for a DIE in the
476 hash table and don't find it. */
477 unsigned int load_all_dies
: 1;
479 /* Non-zero if this CU is from .debug_types. */
480 unsigned int is_debug_types
: 1;
482 /* The section this CU/TU lives in.
483 If the DIE refers to a DWO file, this is always the original die,
485 struct dwarf2_section_info
*info_or_types_section
;
487 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
488 of the CU cache it gets reset to NULL again. */
489 struct dwarf2_cu
*cu
;
491 /* The corresponding objfile.
492 Normally we can get the objfile from dwarf2_per_objfile.
493 However we can enter this file with just a "per_cu" handle. */
494 struct objfile
*objfile
;
496 /* When using partial symbol tables, the 'psymtab' field is active.
497 Otherwise the 'quick' field is active. */
500 /* The partial symbol table associated with this compilation unit,
501 or NULL for unread partial units. */
502 struct partial_symtab
*psymtab
;
504 /* Data needed by the "quick" functions. */
505 struct dwarf2_per_cu_quick_data
*quick
;
508 /* The CUs we import using DW_TAG_imported_unit. This is filled in
509 while reading psymtabs, used to compute the psymtab dependencies,
510 and then cleared. Then it is filled in again while reading full
511 symbols, and only deleted when the objfile is destroyed. */
512 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
515 /* Entry in the signatured_types hash table. */
517 struct signatured_type
519 /* The type's signature. */
522 /* Offset in the TU of the type's DIE, as read from the TU header.
523 If the definition lives in a DWO file, this value is unusable. */
524 cu_offset type_offset_in_tu
;
526 /* Offset in the section of the type's DIE.
527 If the definition lives in a DWO file, this is the offset in the
528 .debug_types.dwo section.
529 The value is zero until the actual value is known.
530 Zero is otherwise not a valid section offset. */
531 sect_offset type_offset_in_section
;
533 /* The CU(/TU) of this type. */
534 struct dwarf2_per_cu_data per_cu
;
537 /* These sections are what may appear in a "dwo" file. */
541 struct dwarf2_section_info abbrev
;
542 struct dwarf2_section_info info
;
543 struct dwarf2_section_info line
;
544 struct dwarf2_section_info loc
;
545 struct dwarf2_section_info str
;
546 struct dwarf2_section_info str_offsets
;
547 VEC (dwarf2_section_info_def
) *types
;
550 /* Common bits of DWO CUs/TUs. */
554 /* Backlink to the containing struct dwo_file. */
555 struct dwo_file
*dwo_file
;
557 /* The "id" that distinguishes this CU/TU.
558 .debug_info calls this "dwo_id", .debug_types calls this "signature".
559 Since signatures came first, we stick with it for consistency. */
562 /* The section this CU/TU lives in, in the DWO file. */
563 struct dwarf2_section_info
*info_or_types_section
;
565 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
569 /* For types, offset in the type's DIE of the type defined by this TU. */
570 cu_offset type_offset_in_tu
;
573 /* Data for one DWO file. */
577 /* The DW_AT_GNU_dwo_name attribute.
578 We don't manage space for this, it's an attribute. */
579 const char *dwo_name
;
581 /* The bfd, when the file is open. Otherwise this is NULL. */
584 /* Section info for this file. */
585 struct dwo_sections sections
;
587 /* Table of CUs in the file.
588 Each element is a struct dwo_unit. */
591 /* Table of TUs in the file.
592 Each element is a struct dwo_unit. */
596 /* Struct used to pass misc. parameters to read_die_and_children, et
597 al. which are used for both .debug_info and .debug_types dies.
598 All parameters here are unchanging for the life of the call. This
599 struct exists to abstract away the constant parameters of die reading. */
601 struct die_reader_specs
603 /* die_section->asection->owner. */
606 /* The CU of the DIE we are parsing. */
607 struct dwarf2_cu
*cu
;
609 /* Non-NULL if reading a DWO file. */
610 struct dwo_file
*dwo_file
;
612 /* The section the die comes from.
613 This is either .debug_info or .debug_types, or the .dwo variants. */
614 struct dwarf2_section_info
*die_section
;
616 /* die_section->buffer. */
619 /* The end of the buffer. */
620 const gdb_byte
*buffer_end
;
623 /* Type of function passed to init_cutu_and_read_dies, et.al. */
624 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
626 struct die_info
*comp_unit_die
,
630 /* The line number information for a compilation unit (found in the
631 .debug_line section) begins with a "statement program header",
632 which contains the following information. */
635 unsigned int total_length
;
636 unsigned short version
;
637 unsigned int header_length
;
638 unsigned char minimum_instruction_length
;
639 unsigned char maximum_ops_per_instruction
;
640 unsigned char default_is_stmt
;
642 unsigned char line_range
;
643 unsigned char opcode_base
;
645 /* standard_opcode_lengths[i] is the number of operands for the
646 standard opcode whose value is i. This means that
647 standard_opcode_lengths[0] is unused, and the last meaningful
648 element is standard_opcode_lengths[opcode_base - 1]. */
649 unsigned char *standard_opcode_lengths
;
651 /* The include_directories table. NOTE! These strings are not
652 allocated with xmalloc; instead, they are pointers into
653 debug_line_buffer. If you try to free them, `free' will get
655 unsigned int num_include_dirs
, include_dirs_size
;
658 /* The file_names table. NOTE! These strings are not allocated
659 with xmalloc; instead, they are pointers into debug_line_buffer.
660 Don't try to free them directly. */
661 unsigned int num_file_names
, file_names_size
;
665 unsigned int dir_index
;
666 unsigned int mod_time
;
668 int included_p
; /* Non-zero if referenced by the Line Number Program. */
669 struct symtab
*symtab
; /* The associated symbol table, if any. */
672 /* The start and end of the statement program following this
673 header. These point into dwarf2_per_objfile->line_buffer. */
674 gdb_byte
*statement_program_start
, *statement_program_end
;
677 /* When we construct a partial symbol table entry we only
678 need this much information. */
679 struct partial_die_info
681 /* Offset of this DIE. */
684 /* DWARF-2 tag for this DIE. */
685 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
687 /* Assorted flags describing the data found in this DIE. */
688 unsigned int has_children
: 1;
689 unsigned int is_external
: 1;
690 unsigned int is_declaration
: 1;
691 unsigned int has_type
: 1;
692 unsigned int has_specification
: 1;
693 unsigned int has_pc_info
: 1;
694 unsigned int may_be_inlined
: 1;
696 /* Flag set if the SCOPE field of this structure has been
698 unsigned int scope_set
: 1;
700 /* Flag set if the DIE has a byte_size attribute. */
701 unsigned int has_byte_size
: 1;
703 /* Flag set if any of the DIE's children are template arguments. */
704 unsigned int has_template_arguments
: 1;
706 /* Flag set if fixup_partial_die has been called on this die. */
707 unsigned int fixup_called
: 1;
709 /* The name of this DIE. Normally the value of DW_AT_name, but
710 sometimes a default name for unnamed DIEs. */
713 /* The linkage name, if present. */
714 const char *linkage_name
;
716 /* The scope to prepend to our children. This is generally
717 allocated on the comp_unit_obstack, so will disappear
718 when this compilation unit leaves the cache. */
721 /* Some data associated with the partial DIE. The tag determines
722 which field is live. */
725 /* The location description associated with this DIE, if any. */
726 struct dwarf_block
*locdesc
;
727 /* The offset of an import, for DW_TAG_imported_unit. */
731 /* If HAS_PC_INFO, the PC range associated with this DIE. */
735 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
736 DW_AT_sibling, if any. */
737 /* NOTE: This member isn't strictly necessary, read_partial_die could
738 return DW_AT_sibling values to its caller load_partial_dies. */
741 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
742 DW_AT_specification (or DW_AT_abstract_origin or
744 sect_offset spec_offset
;
746 /* Pointers to this DIE's parent, first child, and next sibling,
748 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
751 /* This data structure holds the information of an abbrev. */
754 unsigned int number
; /* number identifying abbrev */
755 enum dwarf_tag tag
; /* dwarf tag */
756 unsigned short has_children
; /* boolean */
757 unsigned short num_attrs
; /* number of attributes */
758 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
759 struct abbrev_info
*next
; /* next in chain */
764 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
765 ENUM_BITFIELD(dwarf_form
) form
: 16;
768 /* Attributes have a name and a value. */
771 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
772 ENUM_BITFIELD(dwarf_form
) form
: 15;
774 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
775 field should be in u.str (existing only for DW_STRING) but it is kept
776 here for better struct attribute alignment. */
777 unsigned int string_is_canonical
: 1;
782 struct dwarf_block
*blk
;
786 struct signatured_type
*signatured_type
;
791 /* This data structure holds a complete die structure. */
794 /* DWARF-2 tag for this DIE. */
795 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
797 /* Number of attributes */
798 unsigned char num_attrs
;
800 /* True if we're presently building the full type name for the
801 type derived from this DIE. */
802 unsigned char building_fullname
: 1;
807 /* Offset in .debug_info or .debug_types section. */
810 /* The dies in a compilation unit form an n-ary tree. PARENT
811 points to this die's parent; CHILD points to the first child of
812 this node; and all the children of a given node are chained
813 together via their SIBLING fields. */
814 struct die_info
*child
; /* Its first child, if any. */
815 struct die_info
*sibling
; /* Its next sibling, if any. */
816 struct die_info
*parent
; /* Its parent, if any. */
818 /* An array of attributes, with NUM_ATTRS elements. There may be
819 zero, but it's not common and zero-sized arrays are not
820 sufficiently portable C. */
821 struct attribute attrs
[1];
824 /* Get at parts of an attribute structure. */
826 #define DW_STRING(attr) ((attr)->u.str)
827 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
828 #define DW_UNSND(attr) ((attr)->u.unsnd)
829 #define DW_BLOCK(attr) ((attr)->u.blk)
830 #define DW_SND(attr) ((attr)->u.snd)
831 #define DW_ADDR(attr) ((attr)->u.addr)
832 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
834 /* Blocks are a bunch of untyped bytes. */
839 /* Valid only if SIZE is not zero. */
843 #ifndef ATTR_ALLOC_CHUNK
844 #define ATTR_ALLOC_CHUNK 4
847 /* Allocate fields for structs, unions and enums in this size. */
848 #ifndef DW_FIELD_ALLOC_CHUNK
849 #define DW_FIELD_ALLOC_CHUNK 4
852 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
853 but this would require a corresponding change in unpack_field_as_long
855 static int bits_per_byte
= 8;
857 /* The routines that read and process dies for a C struct or C++ class
858 pass lists of data member fields and lists of member function fields
859 in an instance of a field_info structure, as defined below. */
862 /* List of data member and baseclasses fields. */
865 struct nextfield
*next
;
870 *fields
, *baseclasses
;
872 /* Number of fields (including baseclasses). */
875 /* Number of baseclasses. */
878 /* Set if the accesibility of one of the fields is not public. */
879 int non_public_fields
;
881 /* Member function fields array, entries are allocated in the order they
882 are encountered in the object file. */
885 struct nextfnfield
*next
;
886 struct fn_field fnfield
;
890 /* Member function fieldlist array, contains name of possibly overloaded
891 member function, number of overloaded member functions and a pointer
892 to the head of the member function field chain. */
897 struct nextfnfield
*head
;
901 /* Number of entries in the fnfieldlists array. */
904 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
905 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
906 struct typedef_field_list
908 struct typedef_field field
;
909 struct typedef_field_list
*next
;
912 unsigned typedef_field_list_count
;
915 /* One item on the queue of compilation units to read in full symbols
917 struct dwarf2_queue_item
919 struct dwarf2_per_cu_data
*per_cu
;
920 enum language pretend_language
;
921 struct dwarf2_queue_item
*next
;
924 /* The current queue. */
925 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
927 /* Loaded secondary compilation units are kept in memory until they
928 have not been referenced for the processing of this many
929 compilation units. Set this to zero to disable caching. Cache
930 sizes of up to at least twenty will improve startup time for
931 typical inter-CU-reference binaries, at an obvious memory cost. */
932 static int dwarf2_max_cache_age
= 5;
934 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
935 struct cmd_list_element
*c
, const char *value
)
937 fprintf_filtered (file
, _("The upper bound on the age of cached "
938 "dwarf2 compilation units is %s.\n"),
943 /* Various complaints about symbol reading that don't abort the process. */
946 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
948 complaint (&symfile_complaints
,
949 _("statement list doesn't fit in .debug_line section"));
953 dwarf2_debug_line_missing_file_complaint (void)
955 complaint (&symfile_complaints
,
956 _(".debug_line section has line data without a file"));
960 dwarf2_debug_line_missing_end_sequence_complaint (void)
962 complaint (&symfile_complaints
,
963 _(".debug_line section has line "
964 "program sequence without an end"));
968 dwarf2_complex_location_expr_complaint (void)
970 complaint (&symfile_complaints
, _("location expression too complex"));
974 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
977 complaint (&symfile_complaints
,
978 _("const value length mismatch for '%s', got %d, expected %d"),
983 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
985 complaint (&symfile_complaints
,
986 _("debug info runs off end of %s section"
988 section
->asection
->name
,
989 bfd_get_filename (section
->asection
->owner
));
993 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
995 complaint (&symfile_complaints
,
996 _("macro debug info contains a "
997 "malformed macro definition:\n`%s'"),
1002 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1004 complaint (&symfile_complaints
,
1005 _("invalid attribute class or form for '%s' in '%s'"),
1009 /* local function prototypes */
1011 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1013 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1016 static void dwarf2_find_base_address (struct die_info
*die
,
1017 struct dwarf2_cu
*cu
);
1019 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1021 static void scan_partial_symbols (struct partial_die_info
*,
1022 CORE_ADDR
*, CORE_ADDR
*,
1023 int, struct dwarf2_cu
*);
1025 static void add_partial_symbol (struct partial_die_info
*,
1026 struct dwarf2_cu
*);
1028 static void add_partial_namespace (struct partial_die_info
*pdi
,
1029 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1030 int need_pc
, struct dwarf2_cu
*cu
);
1032 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1033 CORE_ADDR
*highpc
, int need_pc
,
1034 struct dwarf2_cu
*cu
);
1036 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1037 struct dwarf2_cu
*cu
);
1039 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1040 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1041 int need_pc
, struct dwarf2_cu
*cu
);
1043 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
1045 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1047 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1048 struct dwarf2_section_info
*);
1050 static void dwarf2_free_abbrev_table (void *);
1052 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1054 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
1055 struct dwarf2_cu
*);
1057 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
1058 struct dwarf2_cu
*);
1060 static struct partial_die_info
*load_partial_dies
1061 (const struct die_reader_specs
*, gdb_byte
*, int);
1063 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1064 struct partial_die_info
*,
1065 struct abbrev_info
*,
1069 static struct partial_die_info
*find_partial_die (sect_offset
,
1070 struct dwarf2_cu
*);
1072 static void fixup_partial_die (struct partial_die_info
*,
1073 struct dwarf2_cu
*);
1075 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1076 struct attribute
*, struct attr_abbrev
*,
1079 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
1081 static int read_1_signed_byte (bfd
*, gdb_byte
*);
1083 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
1085 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
1087 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
1089 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1092 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1094 static LONGEST read_checked_initial_length_and_offset
1095 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1096 unsigned int *, unsigned int *);
1098 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1101 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1103 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1105 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1107 static char *read_indirect_string (bfd
*, gdb_byte
*,
1108 const struct comp_unit_head
*,
1111 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1113 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1115 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1118 static char *read_str_index (const struct die_reader_specs
*reader
,
1119 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1121 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1123 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1124 struct dwarf2_cu
*);
1126 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1128 struct dwarf2_cu
*);
1130 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1131 struct dwarf2_cu
*cu
);
1133 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1135 static struct die_info
*die_specification (struct die_info
*die
,
1136 struct dwarf2_cu
**);
1138 static void free_line_header (struct line_header
*lh
);
1140 static void add_file_name (struct line_header
*, char *, unsigned int,
1141 unsigned int, unsigned int);
1143 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1144 struct dwarf2_cu
*cu
);
1146 static void dwarf_decode_lines (struct line_header
*, const char *,
1147 struct dwarf2_cu
*, struct partial_symtab
*,
1150 static void dwarf2_start_subfile (char *, const char *, const char *);
1152 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1153 struct dwarf2_cu
*);
1155 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1156 struct dwarf2_cu
*, struct symbol
*);
1158 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1159 struct dwarf2_cu
*);
1161 static void dwarf2_const_value_attr (struct attribute
*attr
,
1164 struct obstack
*obstack
,
1165 struct dwarf2_cu
*cu
, LONGEST
*value
,
1167 struct dwarf2_locexpr_baton
**baton
);
1169 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1171 static int need_gnat_info (struct dwarf2_cu
*);
1173 static struct type
*die_descriptive_type (struct die_info
*,
1174 struct dwarf2_cu
*);
1176 static void set_descriptive_type (struct type
*, struct die_info
*,
1177 struct dwarf2_cu
*);
1179 static struct type
*die_containing_type (struct die_info
*,
1180 struct dwarf2_cu
*);
1182 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1183 struct dwarf2_cu
*);
1185 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1187 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1189 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1191 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1192 const char *suffix
, int physname
,
1193 struct dwarf2_cu
*cu
);
1195 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1197 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1199 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1201 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1203 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1205 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1206 struct dwarf2_cu
*, struct partial_symtab
*);
1208 static int dwarf2_get_pc_bounds (struct die_info
*,
1209 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1210 struct partial_symtab
*);
1212 static void get_scope_pc_bounds (struct die_info
*,
1213 CORE_ADDR
*, CORE_ADDR
*,
1214 struct dwarf2_cu
*);
1216 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1217 CORE_ADDR
, struct dwarf2_cu
*);
1219 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1220 struct dwarf2_cu
*);
1222 static void dwarf2_attach_fields_to_type (struct field_info
*,
1223 struct type
*, struct dwarf2_cu
*);
1225 static void dwarf2_add_member_fn (struct field_info
*,
1226 struct die_info
*, struct type
*,
1227 struct dwarf2_cu
*);
1229 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1231 struct dwarf2_cu
*);
1233 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1235 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1237 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1239 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1241 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1243 static struct type
*read_module_type (struct die_info
*die
,
1244 struct dwarf2_cu
*cu
);
1246 static const char *namespace_name (struct die_info
*die
,
1247 int *is_anonymous
, struct dwarf2_cu
*);
1249 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1251 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1253 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1254 struct dwarf2_cu
*);
1256 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1258 gdb_byte
**new_info_ptr
,
1259 struct die_info
*parent
);
1261 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1263 gdb_byte
**new_info_ptr
,
1264 struct die_info
*parent
);
1266 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1267 struct die_info
**, gdb_byte
*, int *, int);
1269 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1270 struct die_info
**, gdb_byte
*, int *);
1272 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1274 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1277 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1279 static const char *dwarf2_full_name (char *name
,
1280 struct die_info
*die
,
1281 struct dwarf2_cu
*cu
);
1283 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1284 struct dwarf2_cu
**);
1286 static const char *dwarf_tag_name (unsigned int);
1288 static const char *dwarf_attr_name (unsigned int);
1290 static const char *dwarf_form_name (unsigned int);
1292 static char *dwarf_bool_name (unsigned int);
1294 static const char *dwarf_type_encoding_name (unsigned int);
1296 static struct die_info
*sibling_die (struct die_info
*);
1298 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1300 static void dump_die_for_error (struct die_info
*);
1302 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1305 /*static*/ void dump_die (struct die_info
*, int max_level
);
1307 static void store_in_ref_table (struct die_info
*,
1308 struct dwarf2_cu
*);
1310 static int is_ref_attr (struct attribute
*);
1312 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1314 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1316 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1318 struct dwarf2_cu
**);
1320 static struct die_info
*follow_die_ref (struct die_info
*,
1322 struct dwarf2_cu
**);
1324 static struct die_info
*follow_die_sig (struct die_info
*,
1326 struct dwarf2_cu
**);
1328 static struct signatured_type
*lookup_signatured_type_at_offset
1329 (struct objfile
*objfile
,
1330 struct dwarf2_section_info
*section
, sect_offset offset
);
1332 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1334 static void read_signatured_type (struct signatured_type
*);
1336 /* memory allocation interface */
1338 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1340 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1342 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1344 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1345 char *, bfd
*, struct dwarf2_cu
*,
1346 struct dwarf2_section_info
*,
1349 static int attr_form_is_block (struct attribute
*);
1351 static int attr_form_is_section_offset (struct attribute
*);
1353 static int attr_form_is_constant (struct attribute
*);
1355 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1356 struct dwarf2_loclist_baton
*baton
,
1357 struct attribute
*attr
);
1359 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1361 struct dwarf2_cu
*cu
);
1363 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1365 struct abbrev_info
*abbrev
);
1367 static void free_stack_comp_unit (void *);
1369 static hashval_t
partial_die_hash (const void *item
);
1371 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1373 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1374 (sect_offset offset
, struct objfile
*objfile
);
1376 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1377 struct dwarf2_per_cu_data
*per_cu
);
1379 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1380 struct die_info
*comp_unit_die
,
1381 enum language pretend_language
);
1383 static void free_heap_comp_unit (void *);
1385 static void free_cached_comp_units (void *);
1387 static void age_cached_comp_units (void);
1389 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1391 static struct type
*set_die_type (struct die_info
*, struct type
*,
1392 struct dwarf2_cu
*);
1394 static void create_all_comp_units (struct objfile
*);
1396 static int create_all_type_units (struct objfile
*);
1398 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1401 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1404 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1405 struct dwarf2_per_cu_data
*);
1407 static void dwarf2_mark (struct dwarf2_cu
*);
1409 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1411 static struct type
*get_die_type_at_offset (sect_offset
,
1412 struct dwarf2_per_cu_data
*per_cu
);
1414 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1416 static void dwarf2_release_queue (void *dummy
);
1418 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1419 enum language pretend_language
);
1421 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1422 struct dwarf2_per_cu_data
*per_cu
,
1423 enum language pretend_language
);
1425 static void process_queue (void);
1427 static void find_file_and_directory (struct die_info
*die
,
1428 struct dwarf2_cu
*cu
,
1429 char **name
, char **comp_dir
);
1431 static char *file_full_name (int file
, struct line_header
*lh
,
1432 const char *comp_dir
);
1434 static gdb_byte
*read_and_check_comp_unit_head
1435 (struct comp_unit_head
*header
,
1436 struct dwarf2_section_info
*section
, gdb_byte
*info_ptr
,
1437 int is_debug_types_section
);
1439 static void init_cutu_and_read_dies
1440 (struct dwarf2_per_cu_data
*this_cu
, int use_existing_cu
, int keep
,
1441 die_reader_func_ftype
*die_reader_func
, void *data
);
1443 static void init_cutu_and_read_dies_simple
1444 (struct dwarf2_per_cu_data
*this_cu
,
1445 die_reader_func_ftype
*die_reader_func
, void *data
);
1447 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1449 static void process_psymtab_comp_unit (struct dwarf2_per_cu_data
*, int);
1451 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1453 static struct dwo_unit
*lookup_dwo_comp_unit
1454 (struct dwarf2_per_cu_data
*, char *, const char *, ULONGEST
);
1456 static struct dwo_unit
*lookup_dwo_type_unit
1457 (struct signatured_type
*, char *, const char *);
1459 static void free_dwo_file_cleanup (void *);
1461 static void munmap_section_buffer (struct dwarf2_section_info
*);
1463 static void process_cu_includes (void);
1467 /* Convert VALUE between big- and little-endian. */
1469 byte_swap (offset_type value
)
1473 result
= (value
& 0xff) << 24;
1474 result
|= (value
& 0xff00) << 8;
1475 result
|= (value
& 0xff0000) >> 8;
1476 result
|= (value
& 0xff000000) >> 24;
1480 #define MAYBE_SWAP(V) byte_swap (V)
1483 #define MAYBE_SWAP(V) (V)
1484 #endif /* WORDS_BIGENDIAN */
1486 /* The suffix for an index file. */
1487 #define INDEX_SUFFIX ".gdb-index"
1489 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1490 struct dwarf2_cu
*cu
);
1492 /* Try to locate the sections we need for DWARF 2 debugging
1493 information and return true if we have enough to do something.
1494 NAMES points to the dwarf2 section names, or is NULL if the standard
1495 ELF names are used. */
1498 dwarf2_has_info (struct objfile
*objfile
,
1499 const struct dwarf2_debug_sections
*names
)
1501 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1502 if (!dwarf2_per_objfile
)
1504 /* Initialize per-objfile state. */
1505 struct dwarf2_per_objfile
*data
1506 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1508 memset (data
, 0, sizeof (*data
));
1509 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1510 dwarf2_per_objfile
= data
;
1512 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1514 dwarf2_per_objfile
->objfile
= objfile
;
1516 return (dwarf2_per_objfile
->info
.asection
!= NULL
1517 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1520 /* When loading sections, we look either for uncompressed section or for
1521 compressed section names. */
1524 section_is_p (const char *section_name
,
1525 const struct dwarf2_section_names
*names
)
1527 if (names
->normal
!= NULL
1528 && strcmp (section_name
, names
->normal
) == 0)
1530 if (names
->compressed
!= NULL
1531 && strcmp (section_name
, names
->compressed
) == 0)
1536 /* This function is mapped across the sections and remembers the
1537 offset and size of each of the debugging sections we are interested
1541 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1543 const struct dwarf2_debug_sections
*names
;
1546 names
= &dwarf2_elf_names
;
1548 names
= (const struct dwarf2_debug_sections
*) vnames
;
1550 if (section_is_p (sectp
->name
, &names
->info
))
1552 dwarf2_per_objfile
->info
.asection
= sectp
;
1553 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1555 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1557 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1558 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1560 else if (section_is_p (sectp
->name
, &names
->line
))
1562 dwarf2_per_objfile
->line
.asection
= sectp
;
1563 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1565 else if (section_is_p (sectp
->name
, &names
->loc
))
1567 dwarf2_per_objfile
->loc
.asection
= sectp
;
1568 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1570 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1572 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1573 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1575 else if (section_is_p (sectp
->name
, &names
->macro
))
1577 dwarf2_per_objfile
->macro
.asection
= sectp
;
1578 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1580 else if (section_is_p (sectp
->name
, &names
->str
))
1582 dwarf2_per_objfile
->str
.asection
= sectp
;
1583 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1585 else if (section_is_p (sectp
->name
, &names
->addr
))
1587 dwarf2_per_objfile
->addr
.asection
= sectp
;
1588 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1590 else if (section_is_p (sectp
->name
, &names
->frame
))
1592 dwarf2_per_objfile
->frame
.asection
= sectp
;
1593 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1595 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1597 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1599 if (aflag
& SEC_HAS_CONTENTS
)
1601 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1602 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1605 else if (section_is_p (sectp
->name
, &names
->ranges
))
1607 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1608 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1610 else if (section_is_p (sectp
->name
, &names
->types
))
1612 struct dwarf2_section_info type_section
;
1614 memset (&type_section
, 0, sizeof (type_section
));
1615 type_section
.asection
= sectp
;
1616 type_section
.size
= bfd_get_section_size (sectp
);
1618 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1621 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1623 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1624 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1627 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1628 && bfd_section_vma (abfd
, sectp
) == 0)
1629 dwarf2_per_objfile
->has_section_at_zero
= 1;
1632 /* Decompress a section that was compressed using zlib. Store the
1633 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1636 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1637 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1639 bfd
*abfd
= sectp
->owner
;
1641 error (_("Support for zlib-compressed DWARF data (from '%s') "
1642 "is disabled in this copy of GDB"),
1643 bfd_get_filename (abfd
));
1645 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1646 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1647 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1648 bfd_size_type uncompressed_size
;
1649 gdb_byte
*uncompressed_buffer
;
1652 int header_size
= 12;
1654 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1655 || bfd_bread (compressed_buffer
,
1656 compressed_size
, abfd
) != compressed_size
)
1657 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1658 bfd_get_filename (abfd
));
1660 /* Read the zlib header. In this case, it should be "ZLIB" followed
1661 by the uncompressed section size, 8 bytes in big-endian order. */
1662 if (compressed_size
< header_size
1663 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1664 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1665 bfd_get_filename (abfd
));
1666 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1667 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1668 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1669 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1670 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1671 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1672 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1673 uncompressed_size
+= compressed_buffer
[11];
1675 /* It is possible the section consists of several compressed
1676 buffers concatenated together, so we uncompress in a loop. */
1680 strm
.avail_in
= compressed_size
- header_size
;
1681 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1682 strm
.avail_out
= uncompressed_size
;
1683 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1685 rc
= inflateInit (&strm
);
1686 while (strm
.avail_in
> 0)
1689 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1690 bfd_get_filename (abfd
), rc
);
1691 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1692 + (uncompressed_size
- strm
.avail_out
));
1693 rc
= inflate (&strm
, Z_FINISH
);
1694 if (rc
!= Z_STREAM_END
)
1695 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1696 bfd_get_filename (abfd
), rc
);
1697 rc
= inflateReset (&strm
);
1699 rc
= inflateEnd (&strm
);
1701 || strm
.avail_out
!= 0)
1702 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1703 bfd_get_filename (abfd
), rc
);
1705 do_cleanups (cleanup
);
1706 *outbuf
= uncompressed_buffer
;
1707 *outsize
= uncompressed_size
;
1711 /* A helper function that decides whether a section is empty,
1715 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1717 return info
->asection
== NULL
|| info
->size
== 0;
1720 /* Read the contents of the section INFO.
1721 OBJFILE is the main object file, but not necessarily the file where
1722 the section comes from. E.g., for DWO files INFO->asection->owner
1723 is the bfd of the DWO file.
1724 If the section is compressed, uncompress it before returning. */
1727 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1729 asection
*sectp
= info
->asection
;
1731 gdb_byte
*buf
, *retbuf
;
1732 unsigned char header
[4];
1736 info
->buffer
= NULL
;
1737 info
->map_addr
= NULL
;
1740 if (dwarf2_section_empty_p (info
))
1743 /* Note that ABFD may not be from OBJFILE, e.g. a DWO section. */
1744 abfd
= sectp
->owner
;
1746 /* Check if the file has a 4-byte header indicating compression. */
1747 if (info
->size
> sizeof (header
)
1748 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1749 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1751 /* Upon decompression, update the buffer and its size. */
1752 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1754 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1762 pagesize
= getpagesize ();
1764 /* Only try to mmap sections which are large enough: we don't want to
1765 waste space due to fragmentation. Also, only try mmap for sections
1766 without relocations. */
1768 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1770 info
->buffer
= bfd_mmap (abfd
, 0, info
->size
, PROT_READ
,
1771 MAP_PRIVATE
, sectp
->filepos
,
1772 &info
->map_addr
, &info
->map_len
);
1774 if ((caddr_t
)info
->buffer
!= MAP_FAILED
)
1776 #if HAVE_POSIX_MADVISE
1777 posix_madvise (info
->map_addr
, info
->map_len
, POSIX_MADV_WILLNEED
);
1784 /* If we get here, we are a normal, not-compressed section. */
1786 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1788 /* When debugging .o files, we may need to apply relocations; see
1789 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1790 We never compress sections in .o files, so we only need to
1791 try this when the section is not compressed. */
1792 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1795 info
->buffer
= retbuf
;
1799 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1800 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1801 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1802 bfd_get_filename (abfd
));
1805 /* A helper function that returns the size of a section in a safe way.
1806 If you are positive that the section has been read before using the
1807 size, then it is safe to refer to the dwarf2_section_info object's
1808 "size" field directly. In other cases, you must call this
1809 function, because for compressed sections the size field is not set
1810 correctly until the section has been read. */
1812 static bfd_size_type
1813 dwarf2_section_size (struct objfile
*objfile
,
1814 struct dwarf2_section_info
*info
)
1817 dwarf2_read_section (objfile
, info
);
1821 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1825 dwarf2_get_section_info (struct objfile
*objfile
,
1826 enum dwarf2_section_enum sect
,
1827 asection
**sectp
, gdb_byte
**bufp
,
1828 bfd_size_type
*sizep
)
1830 struct dwarf2_per_objfile
*data
1831 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1832 struct dwarf2_section_info
*info
;
1834 /* We may see an objfile without any DWARF, in which case we just
1845 case DWARF2_DEBUG_FRAME
:
1846 info
= &data
->frame
;
1848 case DWARF2_EH_FRAME
:
1849 info
= &data
->eh_frame
;
1852 gdb_assert_not_reached ("unexpected section");
1855 dwarf2_read_section (objfile
, info
);
1857 *sectp
= info
->asection
;
1858 *bufp
= info
->buffer
;
1859 *sizep
= info
->size
;
1863 /* DWARF quick_symbols_functions support. */
1865 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1866 unique line tables, so we maintain a separate table of all .debug_line
1867 derived entries to support the sharing.
1868 All the quick functions need is the list of file names. We discard the
1869 line_header when we're done and don't need to record it here. */
1870 struct quick_file_names
1872 /* The offset in .debug_line of the line table. We hash on this. */
1873 unsigned int offset
;
1875 /* The number of entries in file_names, real_names. */
1876 unsigned int num_file_names
;
1878 /* The file names from the line table, after being run through
1880 const char **file_names
;
1882 /* The file names from the line table after being run through
1883 gdb_realpath. These are computed lazily. */
1884 const char **real_names
;
1887 /* When using the index (and thus not using psymtabs), each CU has an
1888 object of this type. This is used to hold information needed by
1889 the various "quick" methods. */
1890 struct dwarf2_per_cu_quick_data
1892 /* The file table. This can be NULL if there was no file table
1893 or it's currently not read in.
1894 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1895 struct quick_file_names
*file_names
;
1897 /* The corresponding symbol table. This is NULL if symbols for this
1898 CU have not yet been read. */
1899 struct symtab
*symtab
;
1901 /* A temporary mark bit used when iterating over all CUs in
1902 expand_symtabs_matching. */
1903 unsigned int mark
: 1;
1905 /* True if we've tried to read the file table and found there isn't one.
1906 There will be no point in trying to read it again next time. */
1907 unsigned int no_file_data
: 1;
1910 /* Hash function for a quick_file_names. */
1913 hash_file_name_entry (const void *e
)
1915 const struct quick_file_names
*file_data
= e
;
1917 return file_data
->offset
;
1920 /* Equality function for a quick_file_names. */
1923 eq_file_name_entry (const void *a
, const void *b
)
1925 const struct quick_file_names
*ea
= a
;
1926 const struct quick_file_names
*eb
= b
;
1928 return ea
->offset
== eb
->offset
;
1931 /* Delete function for a quick_file_names. */
1934 delete_file_name_entry (void *e
)
1936 struct quick_file_names
*file_data
= e
;
1939 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1941 xfree ((void*) file_data
->file_names
[i
]);
1942 if (file_data
->real_names
)
1943 xfree ((void*) file_data
->real_names
[i
]);
1946 /* The space for the struct itself lives on objfile_obstack,
1947 so we don't free it here. */
1950 /* Create a quick_file_names hash table. */
1953 create_quick_file_names_table (unsigned int nr_initial_entries
)
1955 return htab_create_alloc (nr_initial_entries
,
1956 hash_file_name_entry
, eq_file_name_entry
,
1957 delete_file_name_entry
, xcalloc
, xfree
);
1960 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
1961 have to be created afterwards. You should call age_cached_comp_units after
1962 processing PER_CU->CU. dw2_setup must have been already called. */
1965 load_cu (struct dwarf2_per_cu_data
*per_cu
)
1967 if (per_cu
->is_debug_types
)
1968 load_full_type_unit (per_cu
);
1970 load_full_comp_unit (per_cu
, language_minimal
);
1972 gdb_assert (per_cu
->cu
!= NULL
);
1974 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
1977 /* Read in the symbols for PER_CU. */
1980 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1982 struct cleanup
*back_to
;
1984 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1986 if (dwarf2_per_objfile
->using_index
1987 ? per_cu
->v
.quick
->symtab
== NULL
1988 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
1990 queue_comp_unit (per_cu
, language_minimal
);
1996 /* Age the cache, releasing compilation units that have not
1997 been used recently. */
1998 age_cached_comp_units ();
2000 do_cleanups (back_to
);
2003 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2004 the objfile from which this CU came. Returns the resulting symbol
2007 static struct symtab
*
2008 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2010 gdb_assert (dwarf2_per_objfile
->using_index
);
2011 if (!per_cu
->v
.quick
->symtab
)
2013 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2014 increment_reading_symtab ();
2015 dw2_do_instantiate_symtab (per_cu
);
2016 process_cu_includes ();
2017 do_cleanups (back_to
);
2019 return per_cu
->v
.quick
->symtab
;
2022 /* Return the CU given its index. */
2024 static struct dwarf2_per_cu_data
*
2025 dw2_get_cu (int index
)
2027 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2029 index
-= dwarf2_per_objfile
->n_comp_units
;
2030 return dwarf2_per_objfile
->all_type_units
[index
];
2032 return dwarf2_per_objfile
->all_comp_units
[index
];
2035 /* A helper function that knows how to read a 64-bit value in a way
2036 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
2040 extract_cu_value (const char *bytes
, ULONGEST
*result
)
2042 if (sizeof (ULONGEST
) < 8)
2046 /* Ignore the upper 4 bytes if they are all zero. */
2047 for (i
= 0; i
< 4; ++i
)
2048 if (bytes
[i
+ 4] != 0)
2051 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
2054 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2058 /* Read the CU list from the mapped index, and use it to create all
2059 the CU objects for this objfile. Return 0 if something went wrong,
2060 1 if everything went ok. */
2063 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
2064 offset_type cu_list_elements
)
2068 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
2069 dwarf2_per_objfile
->all_comp_units
2070 = obstack_alloc (&objfile
->objfile_obstack
,
2071 dwarf2_per_objfile
->n_comp_units
2072 * sizeof (struct dwarf2_per_cu_data
*));
2074 for (i
= 0; i
< cu_list_elements
; i
+= 2)
2076 struct dwarf2_per_cu_data
*the_cu
;
2077 ULONGEST offset
, length
;
2079 if (!extract_cu_value (cu_list
, &offset
)
2080 || !extract_cu_value (cu_list
+ 8, &length
))
2084 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2085 struct dwarf2_per_cu_data
);
2086 the_cu
->offset
.sect_off
= offset
;
2087 the_cu
->length
= length
;
2088 the_cu
->objfile
= objfile
;
2089 the_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
2090 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2091 struct dwarf2_per_cu_quick_data
);
2092 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
2098 /* Create the signatured type hash table from the index. */
2101 create_signatured_type_table_from_index (struct objfile
*objfile
,
2102 struct dwarf2_section_info
*section
,
2103 const gdb_byte
*bytes
,
2104 offset_type elements
)
2107 htab_t sig_types_hash
;
2109 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2110 dwarf2_per_objfile
->all_type_units
2111 = obstack_alloc (&objfile
->objfile_obstack
,
2112 dwarf2_per_objfile
->n_type_units
2113 * sizeof (struct dwarf2_per_cu_data
*));
2115 sig_types_hash
= allocate_signatured_type_table (objfile
);
2117 for (i
= 0; i
< elements
; i
+= 3)
2119 struct signatured_type
*sig_type
;
2120 ULONGEST offset
, type_offset_in_tu
, signature
;
2123 if (!extract_cu_value (bytes
, &offset
)
2124 || !extract_cu_value (bytes
+ 8, &type_offset_in_tu
))
2126 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2129 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2130 struct signatured_type
);
2131 sig_type
->signature
= signature
;
2132 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2133 sig_type
->per_cu
.is_debug_types
= 1;
2134 sig_type
->per_cu
.info_or_types_section
= section
;
2135 sig_type
->per_cu
.offset
.sect_off
= offset
;
2136 sig_type
->per_cu
.objfile
= objfile
;
2137 sig_type
->per_cu
.v
.quick
2138 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2139 struct dwarf2_per_cu_quick_data
);
2141 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2144 dwarf2_per_objfile
->all_type_units
[i
/ 3] = &sig_type
->per_cu
;
2147 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2152 /* Read the address map data from the mapped index, and use it to
2153 populate the objfile's psymtabs_addrmap. */
2156 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2158 const gdb_byte
*iter
, *end
;
2159 struct obstack temp_obstack
;
2160 struct addrmap
*mutable_map
;
2161 struct cleanup
*cleanup
;
2164 obstack_init (&temp_obstack
);
2165 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2166 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2168 iter
= index
->address_table
;
2169 end
= iter
+ index
->address_table_size
;
2171 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2175 ULONGEST hi
, lo
, cu_index
;
2176 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2178 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2180 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2183 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2184 dw2_get_cu (cu_index
));
2187 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2188 &objfile
->objfile_obstack
);
2189 do_cleanups (cleanup
);
2192 /* The hash function for strings in the mapped index. This is the same as
2193 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2194 implementation. This is necessary because the hash function is tied to the
2195 format of the mapped index file. The hash values do not have to match with
2198 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2201 mapped_index_string_hash (int index_version
, const void *p
)
2203 const unsigned char *str
= (const unsigned char *) p
;
2207 while ((c
= *str
++) != 0)
2209 if (index_version
>= 5)
2211 r
= r
* 67 + c
- 113;
2217 /* Find a slot in the mapped index INDEX for the object named NAME.
2218 If NAME is found, set *VEC_OUT to point to the CU vector in the
2219 constant pool and return 1. If NAME cannot be found, return 0. */
2222 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2223 offset_type
**vec_out
)
2225 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2227 offset_type slot
, step
;
2228 int (*cmp
) (const char *, const char *);
2230 if (current_language
->la_language
== language_cplus
2231 || current_language
->la_language
== language_java
2232 || current_language
->la_language
== language_fortran
)
2234 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2236 const char *paren
= strchr (name
, '(');
2242 dup
= xmalloc (paren
- name
+ 1);
2243 memcpy (dup
, name
, paren
- name
);
2244 dup
[paren
- name
] = 0;
2246 make_cleanup (xfree
, dup
);
2251 /* Index version 4 did not support case insensitive searches. But the
2252 indices for case insensitive languages are built in lowercase, therefore
2253 simulate our NAME being searched is also lowercased. */
2254 hash
= mapped_index_string_hash ((index
->version
== 4
2255 && case_sensitivity
== case_sensitive_off
2256 ? 5 : index
->version
),
2259 slot
= hash
& (index
->symbol_table_slots
- 1);
2260 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2261 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2265 /* Convert a slot number to an offset into the table. */
2266 offset_type i
= 2 * slot
;
2268 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2270 do_cleanups (back_to
);
2274 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2275 if (!cmp (name
, str
))
2277 *vec_out
= (offset_type
*) (index
->constant_pool
2278 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2279 do_cleanups (back_to
);
2283 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2287 /* Read the index file. If everything went ok, initialize the "quick"
2288 elements of all the CUs and return 1. Otherwise, return 0. */
2291 dwarf2_read_index (struct objfile
*objfile
)
2294 struct mapped_index
*map
;
2295 offset_type
*metadata
;
2296 const gdb_byte
*cu_list
;
2297 const gdb_byte
*types_list
= NULL
;
2298 offset_type version
, cu_list_elements
;
2299 offset_type types_list_elements
= 0;
2302 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2305 /* Older elfutils strip versions could keep the section in the main
2306 executable while splitting it for the separate debug info file. */
2307 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2308 & SEC_HAS_CONTENTS
) == 0)
2311 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2313 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2314 /* Version check. */
2315 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2316 /* Versions earlier than 3 emitted every copy of a psymbol. This
2317 causes the index to behave very poorly for certain requests. Version 3
2318 contained incomplete addrmap. So, it seems better to just ignore such
2322 static int warning_printed
= 0;
2323 if (!warning_printed
)
2325 warning (_("Skipping obsolete .gdb_index section in %s."),
2327 warning_printed
= 1;
2331 /* Index version 4 uses a different hash function than index version
2334 Versions earlier than 6 did not emit psymbols for inlined
2335 functions. Using these files will cause GDB not to be able to
2336 set breakpoints on inlined functions by name, so we ignore these
2337 indices unless the --use-deprecated-index-sections command line
2338 option was supplied. */
2339 if (version
< 6 && !use_deprecated_index_sections
)
2341 static int warning_printed
= 0;
2342 if (!warning_printed
)
2344 warning (_("Skipping deprecated .gdb_index section in %s, pass "
2345 "--use-deprecated-index-sections to use them anyway"),
2347 warning_printed
= 1;
2351 /* Indexes with higher version than the one supported by GDB may be no
2352 longer backward compatible. */
2356 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2357 map
->version
= version
;
2358 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2360 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2363 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2364 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2368 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2369 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2370 - MAYBE_SWAP (metadata
[i
]))
2374 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2375 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2376 - MAYBE_SWAP (metadata
[i
]));
2379 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2380 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2381 - MAYBE_SWAP (metadata
[i
]))
2382 / (2 * sizeof (offset_type
)));
2385 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2387 /* Don't use the index if it's empty. */
2388 if (map
->symbol_table_slots
== 0)
2391 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2394 if (types_list_elements
)
2396 struct dwarf2_section_info
*section
;
2398 /* We can only handle a single .debug_types when we have an
2400 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2403 section
= VEC_index (dwarf2_section_info_def
,
2404 dwarf2_per_objfile
->types
, 0);
2406 if (!create_signatured_type_table_from_index (objfile
, section
,
2408 types_list_elements
))
2412 create_addrmap_from_index (objfile
, map
);
2414 dwarf2_per_objfile
->index_table
= map
;
2415 dwarf2_per_objfile
->using_index
= 1;
2416 dwarf2_per_objfile
->quick_file_names_table
=
2417 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2422 /* A helper for the "quick" functions which sets the global
2423 dwarf2_per_objfile according to OBJFILE. */
2426 dw2_setup (struct objfile
*objfile
)
2428 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2429 gdb_assert (dwarf2_per_objfile
);
2432 /* die_reader_func for dw2_get_file_names. */
2435 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2437 struct die_info
*comp_unit_die
,
2441 struct dwarf2_cu
*cu
= reader
->cu
;
2442 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2443 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2444 struct line_header
*lh
;
2445 struct attribute
*attr
;
2447 char *name
, *comp_dir
;
2449 struct quick_file_names
*qfn
;
2450 unsigned int line_offset
;
2452 /* Our callers never want to match partial units -- instead they
2453 will match the enclosing full CU. */
2454 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2456 this_cu
->v
.quick
->no_file_data
= 1;
2464 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2467 struct quick_file_names find_entry
;
2469 line_offset
= DW_UNSND (attr
);
2471 /* We may have already read in this line header (TU line header sharing).
2472 If we have we're done. */
2473 find_entry
.offset
= line_offset
;
2474 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2475 &find_entry
, INSERT
);
2478 this_cu
->v
.quick
->file_names
= *slot
;
2482 lh
= dwarf_decode_line_header (line_offset
, cu
);
2486 this_cu
->v
.quick
->no_file_data
= 1;
2490 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2491 qfn
->offset
= line_offset
;
2492 gdb_assert (slot
!= NULL
);
2495 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2497 qfn
->num_file_names
= lh
->num_file_names
;
2498 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2499 lh
->num_file_names
* sizeof (char *));
2500 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2501 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2502 qfn
->real_names
= NULL
;
2504 free_line_header (lh
);
2506 this_cu
->v
.quick
->file_names
= qfn
;
2509 /* A helper for the "quick" functions which attempts to read the line
2510 table for THIS_CU. */
2512 static struct quick_file_names
*
2513 dw2_get_file_names (struct objfile
*objfile
,
2514 struct dwarf2_per_cu_data
*this_cu
)
2516 if (this_cu
->v
.quick
->file_names
!= NULL
)
2517 return this_cu
->v
.quick
->file_names
;
2518 /* If we know there is no line data, no point in looking again. */
2519 if (this_cu
->v
.quick
->no_file_data
)
2522 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2523 in the stub for CUs, there's is no need to lookup the DWO file.
2524 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2526 if (this_cu
->is_debug_types
)
2527 init_cutu_and_read_dies (this_cu
, 0, 0, dw2_get_file_names_reader
, NULL
);
2529 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2531 if (this_cu
->v
.quick
->no_file_data
)
2533 return this_cu
->v
.quick
->file_names
;
2536 /* A helper for the "quick" functions which computes and caches the
2537 real path for a given file name from the line table. */
2540 dw2_get_real_path (struct objfile
*objfile
,
2541 struct quick_file_names
*qfn
, int index
)
2543 if (qfn
->real_names
== NULL
)
2544 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2545 qfn
->num_file_names
, sizeof (char *));
2547 if (qfn
->real_names
[index
] == NULL
)
2548 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2550 return qfn
->real_names
[index
];
2553 static struct symtab
*
2554 dw2_find_last_source_symtab (struct objfile
*objfile
)
2558 dw2_setup (objfile
);
2559 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2560 return dw2_instantiate_symtab (dw2_get_cu (index
));
2563 /* Traversal function for dw2_forget_cached_source_info. */
2566 dw2_free_cached_file_names (void **slot
, void *info
)
2568 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2570 if (file_data
->real_names
)
2574 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2576 xfree ((void*) file_data
->real_names
[i
]);
2577 file_data
->real_names
[i
] = NULL
;
2585 dw2_forget_cached_source_info (struct objfile
*objfile
)
2587 dw2_setup (objfile
);
2589 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2590 dw2_free_cached_file_names
, NULL
);
2593 /* Helper function for dw2_map_symtabs_matching_filename that expands
2594 the symtabs and calls the iterator. */
2597 dw2_map_expand_apply (struct objfile
*objfile
,
2598 struct dwarf2_per_cu_data
*per_cu
,
2600 const char *full_path
, const char *real_path
,
2601 int (*callback
) (struct symtab
*, void *),
2604 struct symtab
*last_made
= objfile
->symtabs
;
2606 /* Don't visit already-expanded CUs. */
2607 if (per_cu
->v
.quick
->symtab
)
2610 /* This may expand more than one symtab, and we want to iterate over
2612 dw2_instantiate_symtab (per_cu
);
2614 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2615 objfile
->symtabs
, last_made
);
2618 /* Implementation of the map_symtabs_matching_filename method. */
2621 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
2622 const char *full_path
, const char *real_path
,
2623 int (*callback
) (struct symtab
*, void *),
2627 const char *name_basename
= lbasename (name
);
2628 int name_len
= strlen (name
);
2629 int is_abs
= IS_ABSOLUTE_PATH (name
);
2631 dw2_setup (objfile
);
2633 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2634 + dwarf2_per_objfile
->n_type_units
); ++i
)
2637 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2638 struct quick_file_names
*file_data
;
2640 /* We only need to look at symtabs not already expanded. */
2641 if (per_cu
->v
.quick
->symtab
)
2644 file_data
= dw2_get_file_names (objfile
, per_cu
);
2645 if (file_data
== NULL
)
2648 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2650 const char *this_name
= file_data
->file_names
[j
];
2652 if (FILENAME_CMP (name
, this_name
) == 0
2653 || (!is_abs
&& compare_filenames_for_search (this_name
,
2656 if (dw2_map_expand_apply (objfile
, per_cu
,
2657 name
, full_path
, real_path
,
2662 /* Before we invoke realpath, which can get expensive when many
2663 files are involved, do a quick comparison of the basenames. */
2664 if (! basenames_may_differ
2665 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
2668 if (full_path
!= NULL
)
2670 const char *this_real_name
= dw2_get_real_path (objfile
,
2673 if (this_real_name
!= NULL
2674 && (FILENAME_CMP (full_path
, this_real_name
) == 0
2676 && compare_filenames_for_search (this_real_name
,
2679 if (dw2_map_expand_apply (objfile
, per_cu
,
2680 name
, full_path
, real_path
,
2686 if (real_path
!= NULL
)
2688 const char *this_real_name
= dw2_get_real_path (objfile
,
2691 if (this_real_name
!= NULL
2692 && (FILENAME_CMP (real_path
, this_real_name
) == 0
2694 && compare_filenames_for_search (this_real_name
,
2697 if (dw2_map_expand_apply (objfile
, per_cu
,
2698 name
, full_path
, real_path
,
2709 static struct symtab
*
2710 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2711 const char *name
, domain_enum domain
)
2713 /* We do all the work in the pre_expand_symtabs_matching hook
2718 /* A helper function that expands all symtabs that hold an object
2722 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2724 dw2_setup (objfile
);
2726 /* index_table is NULL if OBJF_READNOW. */
2727 if (dwarf2_per_objfile
->index_table
)
2731 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2734 offset_type i
, len
= MAYBE_SWAP (*vec
);
2735 for (i
= 0; i
< len
; ++i
)
2737 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2738 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2740 dw2_instantiate_symtab (per_cu
);
2747 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2748 enum block_enum block_kind
, const char *name
,
2751 dw2_do_expand_symtabs_matching (objfile
, name
);
2755 dw2_print_stats (struct objfile
*objfile
)
2759 dw2_setup (objfile
);
2761 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2762 + dwarf2_per_objfile
->n_type_units
); ++i
)
2764 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2766 if (!per_cu
->v
.quick
->symtab
)
2769 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2773 dw2_dump (struct objfile
*objfile
)
2775 /* Nothing worth printing. */
2779 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2780 struct section_offsets
*delta
)
2782 /* There's nothing to relocate here. */
2786 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2787 const char *func_name
)
2789 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2793 dw2_expand_all_symtabs (struct objfile
*objfile
)
2797 dw2_setup (objfile
);
2799 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2800 + dwarf2_per_objfile
->n_type_units
); ++i
)
2802 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2804 dw2_instantiate_symtab (per_cu
);
2809 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2810 const char *filename
)
2814 dw2_setup (objfile
);
2816 /* We don't need to consider type units here.
2817 This is only called for examining code, e.g. expand_line_sal.
2818 There can be an order of magnitude (or more) more type units
2819 than comp units, and we avoid them if we can. */
2821 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2824 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2825 struct quick_file_names
*file_data
;
2827 /* We only need to look at symtabs not already expanded. */
2828 if (per_cu
->v
.quick
->symtab
)
2831 file_data
= dw2_get_file_names (objfile
, per_cu
);
2832 if (file_data
== NULL
)
2835 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2837 const char *this_name
= file_data
->file_names
[j
];
2838 if (FILENAME_CMP (this_name
, filename
) == 0)
2840 dw2_instantiate_symtab (per_cu
);
2847 /* A helper function for dw2_find_symbol_file that finds the primary
2848 file name for a given CU. This is a die_reader_func. */
2851 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
2853 struct die_info
*comp_unit_die
,
2857 const char **result_ptr
= data
;
2858 struct dwarf2_cu
*cu
= reader
->cu
;
2859 struct attribute
*attr
;
2861 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
2865 *result_ptr
= DW_STRING (attr
);
2869 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2871 struct dwarf2_per_cu_data
*per_cu
;
2873 struct quick_file_names
*file_data
;
2874 const char *filename
;
2876 dw2_setup (objfile
);
2878 /* index_table is NULL if OBJF_READNOW. */
2879 if (!dwarf2_per_objfile
->index_table
)
2883 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
2885 struct blockvector
*bv
= BLOCKVECTOR (s
);
2886 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2887 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
2890 return sym
->symtab
->filename
;
2895 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2899 /* Note that this just looks at the very first one named NAME -- but
2900 actually we are looking for a function. find_main_filename
2901 should be rewritten so that it doesn't require a custom hook. It
2902 could just use the ordinary symbol tables. */
2903 /* vec[0] is the length, which must always be >0. */
2904 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2906 if (per_cu
->v
.quick
->symtab
!= NULL
)
2907 return per_cu
->v
.quick
->symtab
->filename
;
2909 init_cutu_and_read_dies (per_cu
, 0, 0, dw2_get_primary_filename_reader
,
2916 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2917 struct objfile
*objfile
, int global
,
2918 int (*callback
) (struct block
*,
2919 struct symbol
*, void *),
2920 void *data
, symbol_compare_ftype
*match
,
2921 symbol_compare_ftype
*ordered_compare
)
2923 /* Currently unimplemented; used for Ada. The function can be called if the
2924 current language is Ada for a non-Ada objfile using GNU index. As Ada
2925 does not look for non-Ada symbols this function should just return. */
2929 dw2_expand_symtabs_matching
2930 (struct objfile
*objfile
,
2931 int (*file_matcher
) (const char *, void *),
2932 int (*name_matcher
) (const char *, void *),
2933 enum search_domain kind
,
2938 struct mapped_index
*index
;
2940 dw2_setup (objfile
);
2942 /* index_table is NULL if OBJF_READNOW. */
2943 if (!dwarf2_per_objfile
->index_table
)
2945 index
= dwarf2_per_objfile
->index_table
;
2947 if (file_matcher
!= NULL
)
2949 struct cleanup
*cleanup
;
2950 htab_t visited_found
, visited_not_found
;
2952 visited_found
= htab_create_alloc (10,
2953 htab_hash_pointer
, htab_eq_pointer
,
2954 NULL
, xcalloc
, xfree
);
2955 cleanup
= make_cleanup_htab_delete (visited_found
);
2956 visited_not_found
= htab_create_alloc (10,
2957 htab_hash_pointer
, htab_eq_pointer
,
2958 NULL
, xcalloc
, xfree
);
2959 make_cleanup_htab_delete (visited_not_found
);
2961 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2962 + dwarf2_per_objfile
->n_type_units
); ++i
)
2965 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2966 struct quick_file_names
*file_data
;
2969 per_cu
->v
.quick
->mark
= 0;
2971 /* We only need to look at symtabs not already expanded. */
2972 if (per_cu
->v
.quick
->symtab
)
2975 file_data
= dw2_get_file_names (objfile
, per_cu
);
2976 if (file_data
== NULL
)
2979 if (htab_find (visited_not_found
, file_data
) != NULL
)
2981 else if (htab_find (visited_found
, file_data
) != NULL
)
2983 per_cu
->v
.quick
->mark
= 1;
2987 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2989 if (file_matcher (file_data
->file_names
[j
], data
))
2991 per_cu
->v
.quick
->mark
= 1;
2996 slot
= htab_find_slot (per_cu
->v
.quick
->mark
2998 : visited_not_found
,
3003 do_cleanups (cleanup
);
3006 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3008 offset_type idx
= 2 * iter
;
3010 offset_type
*vec
, vec_len
, vec_idx
;
3012 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3015 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3017 if (! (*name_matcher
) (name
, data
))
3020 /* The name was matched, now expand corresponding CUs that were
3022 vec
= (offset_type
*) (index
->constant_pool
3023 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3024 vec_len
= MAYBE_SWAP (vec
[0]);
3025 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3027 struct dwarf2_per_cu_data
*per_cu
;
3029 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
3030 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3031 dw2_instantiate_symtab (per_cu
);
3036 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3039 static struct symtab
*
3040 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3044 if (BLOCKVECTOR (symtab
) != NULL
3045 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3048 if (symtab
->includes
== NULL
)
3051 for (i
= 0; symtab
->includes
[i
]; ++i
)
3053 struct symtab
*s
= symtab
->includes
[i
];
3055 s
= recursively_find_pc_sect_symtab (s
, pc
);
3063 static struct symtab
*
3064 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3065 struct minimal_symbol
*msymbol
,
3067 struct obj_section
*section
,
3070 struct dwarf2_per_cu_data
*data
;
3071 struct symtab
*result
;
3073 dw2_setup (objfile
);
3075 if (!objfile
->psymtabs_addrmap
)
3078 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3082 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3083 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3084 paddress (get_objfile_arch (objfile
), pc
));
3086 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3087 gdb_assert (result
!= NULL
);
3092 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3093 void *data
, int need_fullname
)
3096 struct cleanup
*cleanup
;
3097 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3098 NULL
, xcalloc
, xfree
);
3100 cleanup
= make_cleanup_htab_delete (visited
);
3101 dw2_setup (objfile
);
3103 /* We can ignore file names coming from already-expanded CUs. */
3104 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3105 + dwarf2_per_objfile
->n_type_units
); ++i
)
3107 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3109 if (per_cu
->v
.quick
->symtab
)
3111 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3114 *slot
= per_cu
->v
.quick
->file_names
;
3118 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3119 + dwarf2_per_objfile
->n_type_units
); ++i
)
3122 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3123 struct quick_file_names
*file_data
;
3126 /* We only need to look at symtabs not already expanded. */
3127 if (per_cu
->v
.quick
->symtab
)
3130 file_data
= dw2_get_file_names (objfile
, per_cu
);
3131 if (file_data
== NULL
)
3134 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3137 /* Already visited. */
3142 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3144 const char *this_real_name
;
3147 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3149 this_real_name
= NULL
;
3150 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3154 do_cleanups (cleanup
);
3158 dw2_has_symbols (struct objfile
*objfile
)
3163 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3166 dw2_find_last_source_symtab
,
3167 dw2_forget_cached_source_info
,
3168 dw2_map_symtabs_matching_filename
,
3170 dw2_pre_expand_symtabs_matching
,
3174 dw2_expand_symtabs_for_function
,
3175 dw2_expand_all_symtabs
,
3176 dw2_expand_symtabs_with_filename
,
3177 dw2_find_symbol_file
,
3178 dw2_map_matching_symbols
,
3179 dw2_expand_symtabs_matching
,
3180 dw2_find_pc_sect_symtab
,
3181 dw2_map_symbol_filenames
3184 /* Initialize for reading DWARF for this objfile. Return 0 if this
3185 file will use psymtabs, or 1 if using the GNU index. */
3188 dwarf2_initialize_objfile (struct objfile
*objfile
)
3190 /* If we're about to read full symbols, don't bother with the
3191 indices. In this case we also don't care if some other debug
3192 format is making psymtabs, because they are all about to be
3194 if ((objfile
->flags
& OBJF_READNOW
))
3198 dwarf2_per_objfile
->using_index
= 1;
3199 create_all_comp_units (objfile
);
3200 create_all_type_units (objfile
);
3201 dwarf2_per_objfile
->quick_file_names_table
=
3202 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3204 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3205 + dwarf2_per_objfile
->n_type_units
); ++i
)
3207 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3209 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3210 struct dwarf2_per_cu_quick_data
);
3213 /* Return 1 so that gdb sees the "quick" functions. However,
3214 these functions will be no-ops because we will have expanded
3219 if (dwarf2_read_index (objfile
))
3227 /* Build a partial symbol table. */
3230 dwarf2_build_psymtabs (struct objfile
*objfile
)
3232 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3234 init_psymbol_list (objfile
, 1024);
3237 dwarf2_build_psymtabs_hard (objfile
);
3240 /* Return TRUE if OFFSET is within CU_HEADER. */
3243 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3245 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3246 sect_offset top
= { (cu_header
->offset
.sect_off
+ cu_header
->length
3247 + cu_header
->initial_length_size
) };
3249 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3252 /* Read in the comp unit header information from the debug_info at info_ptr.
3253 NOTE: This leaves members offset, first_die_offset to be filled in
3257 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3258 gdb_byte
*info_ptr
, bfd
*abfd
)
3261 unsigned int bytes_read
;
3263 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3264 cu_header
->initial_length_size
= bytes_read
;
3265 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3266 info_ptr
+= bytes_read
;
3267 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3269 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3271 info_ptr
+= bytes_read
;
3272 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3274 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3275 if (signed_addr
< 0)
3276 internal_error (__FILE__
, __LINE__
,
3277 _("read_comp_unit_head: dwarf from non elf file"));
3278 cu_header
->signed_addr_p
= signed_addr
;
3283 /* Subroutine of read_and_check_comp_unit_head and
3284 read_and_check_type_unit_head to simplify them.
3285 Perform various error checking on the header. */
3288 error_check_comp_unit_head (struct comp_unit_head
*header
,
3289 struct dwarf2_section_info
*section
)
3291 bfd
*abfd
= section
->asection
->owner
;
3292 const char *filename
= bfd_get_filename (abfd
);
3294 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3295 error (_("Dwarf Error: wrong version in compilation unit header "
3296 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3299 if (header
->abbrev_offset
.sect_off
3300 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
3301 &dwarf2_per_objfile
->abbrev
))
3302 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3303 "(offset 0x%lx + 6) [in module %s]"),
3304 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3307 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3308 avoid potential 32-bit overflow. */
3309 if (((unsigned long) header
->offset
.sect_off
3310 + header
->length
+ header
->initial_length_size
)
3312 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3313 "(offset 0x%lx + 0) [in module %s]"),
3314 (long) header
->length
, (long) header
->offset
.sect_off
,
3318 /* Read in a CU/TU header and perform some basic error checking.
3319 The contents of the header are stored in HEADER.
3320 The result is a pointer to the start of the first DIE. */
3323 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3324 struct dwarf2_section_info
*section
,
3326 int is_debug_types_section
)
3328 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3329 bfd
*abfd
= section
->asection
->owner
;
3331 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3333 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3335 /* If we're reading a type unit, skip over the signature and
3336 type_offset fields. */
3337 if (is_debug_types_section
)
3338 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3340 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3342 error_check_comp_unit_head (header
, section
);
3347 /* Read in the types comp unit header information from .debug_types entry at
3348 types_ptr. The result is a pointer to one past the end of the header. */
3351 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3352 struct dwarf2_section_info
*section
,
3354 ULONGEST
*signature
,
3355 cu_offset
*type_offset_in_tu
)
3357 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3358 bfd
*abfd
= section
->asection
->owner
;
3360 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3362 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3364 /* If we're reading a type unit, skip over the signature and
3365 type_offset fields. */
3366 if (signature
!= NULL
)
3367 *signature
= read_8_bytes (abfd
, info_ptr
);
3369 if (type_offset_in_tu
!= NULL
)
3370 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3371 header
->offset_size
);
3372 info_ptr
+= header
->offset_size
;
3374 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3376 error_check_comp_unit_head (header
, section
);
3381 /* Allocate a new partial symtab for file named NAME and mark this new
3382 partial symtab as being an include of PST. */
3385 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3386 struct objfile
*objfile
)
3388 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3390 subpst
->section_offsets
= pst
->section_offsets
;
3391 subpst
->textlow
= 0;
3392 subpst
->texthigh
= 0;
3394 subpst
->dependencies
= (struct partial_symtab
**)
3395 obstack_alloc (&objfile
->objfile_obstack
,
3396 sizeof (struct partial_symtab
*));
3397 subpst
->dependencies
[0] = pst
;
3398 subpst
->number_of_dependencies
= 1;
3400 subpst
->globals_offset
= 0;
3401 subpst
->n_global_syms
= 0;
3402 subpst
->statics_offset
= 0;
3403 subpst
->n_static_syms
= 0;
3404 subpst
->symtab
= NULL
;
3405 subpst
->read_symtab
= pst
->read_symtab
;
3408 /* No private part is necessary for include psymtabs. This property
3409 can be used to differentiate between such include psymtabs and
3410 the regular ones. */
3411 subpst
->read_symtab_private
= NULL
;
3414 /* Read the Line Number Program data and extract the list of files
3415 included by the source file represented by PST. Build an include
3416 partial symtab for each of these included files. */
3419 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3420 struct die_info
*die
,
3421 struct partial_symtab
*pst
)
3423 struct line_header
*lh
= NULL
;
3424 struct attribute
*attr
;
3426 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3428 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
3430 return; /* No linetable, so no includes. */
3432 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3433 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3435 free_line_header (lh
);
3439 hash_signatured_type (const void *item
)
3441 const struct signatured_type
*sig_type
= item
;
3443 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3444 return sig_type
->signature
;
3448 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
3450 const struct signatured_type
*lhs
= item_lhs
;
3451 const struct signatured_type
*rhs
= item_rhs
;
3453 return lhs
->signature
== rhs
->signature
;
3456 /* Allocate a hash table for signatured types. */
3459 allocate_signatured_type_table (struct objfile
*objfile
)
3461 return htab_create_alloc_ex (41,
3462 hash_signatured_type
,
3465 &objfile
->objfile_obstack
,
3466 hashtab_obstack_allocate
,
3467 dummy_obstack_deallocate
);
3470 /* A helper function to add a signatured type CU to a table. */
3473 add_signatured_type_cu_to_table (void **slot
, void *datum
)
3475 struct signatured_type
*sigt
= *slot
;
3476 struct dwarf2_per_cu_data
***datap
= datum
;
3478 **datap
= &sigt
->per_cu
;
3484 /* Create the hash table of all entries in the .debug_types section.
3485 DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
3486 The result is a pointer to the hash table or NULL if there are
3490 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
3491 VEC (dwarf2_section_info_def
) *types
)
3493 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3494 htab_t types_htab
= NULL
;
3496 struct dwarf2_section_info
*section
;
3498 if (VEC_empty (dwarf2_section_info_def
, types
))
3502 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
3506 gdb_byte
*info_ptr
, *end_ptr
;
3508 dwarf2_read_section (objfile
, section
);
3509 info_ptr
= section
->buffer
;
3511 if (info_ptr
== NULL
)
3514 /* We can't set abfd until now because the section may be empty or
3515 not present, in which case section->asection will be NULL. */
3516 abfd
= section
->asection
->owner
;
3518 if (types_htab
== NULL
)
3521 types_htab
= allocate_dwo_unit_table (objfile
);
3523 types_htab
= allocate_signatured_type_table (objfile
);
3526 if (dwarf2_die_debug
)
3527 fprintf_unfiltered (gdb_stdlog
, "Reading signatured types for %s:\n",
3528 bfd_get_filename (abfd
));
3530 /* We don't use init_cutu_and_read_dies_simple, or some such, here
3531 because we don't need to read any dies: the signature is in the
3534 end_ptr
= info_ptr
+ section
->size
;
3535 while (info_ptr
< end_ptr
)
3538 cu_offset type_offset_in_tu
;
3540 struct signatured_type
*sig_type
;
3541 struct dwo_unit
*dwo_tu
;
3543 gdb_byte
*ptr
= info_ptr
;
3544 struct comp_unit_head header
;
3545 unsigned int length
;
3547 offset
.sect_off
= ptr
- section
->buffer
;
3549 /* We need to read the type's signature in order to build the hash
3550 table, but we don't need anything else just yet. */
3552 ptr
= read_and_check_type_unit_head (&header
, section
, ptr
,
3553 &signature
, &type_offset_in_tu
);
3555 length
= header
.initial_length_size
+ header
.length
;
3557 /* Skip dummy type units. */
3558 if (ptr
>= info_ptr
+ length
3559 || peek_abbrev_code (abfd
, ptr
) == 0)
3561 info_ptr
+= header
.initial_length_size
+ header
.length
;
3568 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3570 dwo_tu
->dwo_file
= dwo_file
;
3571 dwo_tu
->signature
= signature
;
3572 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
3573 dwo_tu
->info_or_types_section
= section
;
3574 dwo_tu
->offset
= offset
;
3575 dwo_tu
->length
= length
;
3579 /* N.B.: type_offset is not usable if this type uses a DWO file.
3580 The real type_offset is in the DWO file. */
3582 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3583 struct signatured_type
);
3584 sig_type
->signature
= signature
;
3585 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3586 sig_type
->per_cu
.objfile
= objfile
;
3587 sig_type
->per_cu
.is_debug_types
= 1;
3588 sig_type
->per_cu
.info_or_types_section
= section
;
3589 sig_type
->per_cu
.offset
= offset
;
3590 sig_type
->per_cu
.length
= length
;
3593 slot
= htab_find_slot (types_htab
,
3594 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
3596 gdb_assert (slot
!= NULL
);
3599 sect_offset dup_offset
;
3603 const struct dwo_unit
*dup_tu
= *slot
;
3605 dup_offset
= dup_tu
->offset
;
3609 const struct signatured_type
*dup_tu
= *slot
;
3611 dup_offset
= dup_tu
->per_cu
.offset
;
3614 complaint (&symfile_complaints
,
3615 _("debug type entry at offset 0x%x is duplicate to the "
3616 "entry at offset 0x%x, signature 0x%s"),
3617 offset
.sect_off
, dup_offset
.sect_off
,
3618 phex (signature
, sizeof (signature
)));
3620 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
3622 if (dwarf2_die_debug
)
3623 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3625 phex (signature
, sizeof (signature
)));
3634 /* Create the hash table of all entries in the .debug_types section,
3635 and initialize all_type_units.
3636 The result is zero if there is an error (e.g. missing .debug_types section),
3637 otherwise non-zero. */
3640 create_all_type_units (struct objfile
*objfile
)
3643 struct dwarf2_per_cu_data
**iter
;
3645 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
3646 if (types_htab
== NULL
)
3648 dwarf2_per_objfile
->signatured_types
= NULL
;
3652 dwarf2_per_objfile
->signatured_types
= types_htab
;
3654 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
3655 dwarf2_per_objfile
->all_type_units
3656 = obstack_alloc (&objfile
->objfile_obstack
,
3657 dwarf2_per_objfile
->n_type_units
3658 * sizeof (struct dwarf2_per_cu_data
*));
3659 iter
= &dwarf2_per_objfile
->all_type_units
[0];
3660 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
3661 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
3662 == dwarf2_per_objfile
->n_type_units
);
3667 /* Lookup a signature based type for DW_FORM_ref_sig8.
3668 Returns NULL if signature SIG is not present in the table. */
3670 static struct signatured_type
*
3671 lookup_signatured_type (ULONGEST sig
)
3673 struct signatured_type find_entry
, *entry
;
3675 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3677 complaint (&symfile_complaints
,
3678 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
3682 find_entry
.signature
= sig
;
3683 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3687 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3690 init_cu_die_reader (struct die_reader_specs
*reader
,
3691 struct dwarf2_cu
*cu
,
3692 struct dwarf2_section_info
*section
,
3693 struct dwo_file
*dwo_file
)
3695 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
3696 reader
->abfd
= section
->asection
->owner
;
3698 reader
->dwo_file
= dwo_file
;
3699 reader
->die_section
= section
;
3700 reader
->buffer
= section
->buffer
;
3701 reader
->buffer_end
= section
->buffer
+ section
->size
;
3704 /* Find the base address of the compilation unit for range lists and
3705 location lists. It will normally be specified by DW_AT_low_pc.
3706 In DWARF-3 draft 4, the base address could be overridden by
3707 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3708 compilation units with discontinuous ranges. */
3711 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3713 struct attribute
*attr
;
3716 cu
->base_address
= 0;
3718 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3721 cu
->base_address
= DW_ADDR (attr
);
3726 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3729 cu
->base_address
= DW_ADDR (attr
);
3735 /* Initialize a CU (or TU) and read its DIEs.
3736 If the CU defers to a DWO file, read the DWO file as well.
3738 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
3739 Otherwise, a new CU is allocated with xmalloc.
3741 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
3742 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
3744 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
3745 linker) then DIE_READER_FUNC will not get called. */
3748 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
3749 int use_existing_cu
, int keep
,
3750 die_reader_func_ftype
*die_reader_func
,
3753 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3754 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
3755 bfd
*abfd
= section
->asection
->owner
;
3756 struct dwarf2_cu
*cu
;
3757 gdb_byte
*begin_info_ptr
, *info_ptr
;
3758 struct die_reader_specs reader
;
3759 struct die_info
*comp_unit_die
;
3761 struct attribute
*attr
;
3762 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
3763 struct signatured_type
*sig_type
= NULL
;
3765 if (use_existing_cu
)
3768 cleanups
= make_cleanup (null_cleanup
, NULL
);
3770 /* This is cheap if the section is already read in. */
3771 dwarf2_read_section (objfile
, section
);
3773 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
3775 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
3778 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
3782 /* If !use_existing_cu, this_cu->cu must be NULL. */
3783 gdb_assert (this_cu
->cu
== NULL
);
3785 cu
= xmalloc (sizeof (*cu
));
3786 init_one_comp_unit (cu
, this_cu
);
3788 /* If an error occurs while loading, release our storage. */
3789 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
3791 if (this_cu
->is_debug_types
)
3795 info_ptr
= read_and_check_type_unit_head (&cu
->header
,
3799 /* There's no way to get from PER_CU to its containing
3800 struct signatured_type.
3801 But we have the signature so we can use that. */
3802 sig_type
= lookup_signatured_type (signature
);
3803 /* We've already scanned all the signatured types,
3804 this must succeed. */
3805 gdb_assert (sig_type
!= NULL
);
3806 gdb_assert (&sig_type
->per_cu
== this_cu
);
3807 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3809 /* LENGTH has not been set yet for type units. */
3810 this_cu
->length
= cu
->header
.length
+ cu
->header
.initial_length_size
;
3812 /* Establish the type offset that can be used to lookup the type. */
3813 sig_type
->type_offset_in_section
.sect_off
=
3814 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
3818 info_ptr
= read_and_check_comp_unit_head (&cu
->header
,
3819 section
, info_ptr
, 0);
3821 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3822 gdb_assert (this_cu
->length
3823 == cu
->header
.length
+ cu
->header
.initial_length_size
);
3827 /* Skip dummy compilation units. */
3828 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
3829 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3831 do_cleanups (cleanups
);
3835 /* Read the abbrevs for this compilation unit into a table. */
3836 if (cu
->dwarf2_abbrevs
== NULL
)
3838 dwarf2_read_abbrevs (cu
, &dwarf2_per_objfile
->abbrev
);
3839 make_cleanup (dwarf2_free_abbrev_table
, cu
);
3842 /* Read the top level CU/TU die. */
3843 init_cu_die_reader (&reader
, cu
, section
, NULL
);
3844 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
3846 /* If we have a DWO stub, process it and then read in the DWO file.
3847 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
3848 a DWO CU, that this test will fail. */
3849 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
3852 char *dwo_name
= DW_STRING (attr
);
3853 const char *comp_dir
;
3854 struct dwo_unit
*dwo_unit
;
3855 ULONGEST signature
; /* Or dwo_id. */
3856 struct attribute
*stmt_list
, *low_pc
, *high_pc
, *ranges
;
3857 int i
,num_extra_attrs
;
3860 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
3861 " has children (offset 0x%x) [in module %s]"),
3862 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
3864 /* These attributes aren't processed until later:
3865 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
3866 However, the attribute is found in the stub which we won't have later.
3867 In order to not impose this complication on the rest of the code,
3868 we read them here and copy them to the DWO CU/TU die. */
3869 stmt_list
= low_pc
= high_pc
= ranges
= NULL
;
3871 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
3873 if (! this_cu
->is_debug_types
)
3874 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3875 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
3876 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
3877 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
3879 /* There should be a DW_AT_addr_base attribute here (if needed).
3880 We need the value before we can process DW_FORM_GNU_addr_index. */
3882 cu
->have_addr_base
= 0;
3883 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
3886 cu
->addr_base
= DW_UNSND (attr
);
3887 cu
->have_addr_base
= 1;
3890 if (this_cu
->is_debug_types
)
3892 gdb_assert (sig_type
!= NULL
);
3893 signature
= sig_type
->signature
;
3897 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
3899 error (_("Dwarf Error: missing dwo_id [in module %s]"),
3901 signature
= DW_UNSND (attr
);
3904 /* We may need the comp_dir in order to find the DWO file. */
3906 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
3908 comp_dir
= DW_STRING (attr
);
3910 if (this_cu
->is_debug_types
)
3911 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
3913 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
3916 if (dwo_unit
== NULL
)
3918 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
3919 " with ID %s [in module %s]"),
3920 this_cu
->offset
.sect_off
,
3921 phex (signature
, sizeof (signature
)),
3925 /* Set up for reading the DWO CU/TU. */
3926 cu
->dwo_unit
= dwo_unit
;
3927 section
= dwo_unit
->info_or_types_section
;
3928 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
3929 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
3931 if (this_cu
->is_debug_types
)
3935 info_ptr
= read_and_check_type_unit_head (&cu
->header
,
3938 gdb_assert (sig_type
->signature
== signature
);
3939 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3940 gdb_assert (dwo_unit
->length
3941 == cu
->header
.length
+ cu
->header
.initial_length_size
);
3943 /* Establish the type offset that can be used to lookup the type.
3944 For DWO files, we don't know it until now. */
3945 sig_type
->type_offset_in_section
.sect_off
=
3946 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
3950 info_ptr
= read_and_check_comp_unit_head (&cu
->header
,
3951 section
, info_ptr
, 0);
3952 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3953 gdb_assert (dwo_unit
->length
3954 == cu
->header
.length
+ cu
->header
.initial_length_size
);
3957 /* Discard the original CU's abbrev table, and read the DWO's. */
3958 dwarf2_free_abbrev_table (cu
);
3959 dwarf2_read_abbrevs (cu
, &dwo_unit
->dwo_file
->sections
.abbrev
);
3961 /* Read in the die, but leave space to copy over the attributes
3962 from the stub. This has the benefit of simplifying the rest of
3963 the code - all the real work is done here. */
3964 num_extra_attrs
= ((stmt_list
!= NULL
)
3967 + (ranges
!= NULL
));
3968 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
3969 &has_children
, num_extra_attrs
);
3971 /* Copy over the attributes from the stub to the DWO die. */
3972 i
= comp_unit_die
->num_attrs
;
3973 if (stmt_list
!= NULL
)
3974 comp_unit_die
->attrs
[i
++] = *stmt_list
;
3976 comp_unit_die
->attrs
[i
++] = *low_pc
;
3977 if (high_pc
!= NULL
)
3978 comp_unit_die
->attrs
[i
++] = *high_pc
;
3980 comp_unit_die
->attrs
[i
++] = *ranges
;
3981 comp_unit_die
->num_attrs
+= num_extra_attrs
;
3983 /* Skip dummy compilation units. */
3984 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
3985 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3987 do_cleanups (cleanups
);
3992 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
3994 if (free_cu_cleanup
!= NULL
)
3998 /* We've successfully allocated this compilation unit. Let our
3999 caller clean it up when finished with it. */
4000 discard_cleanups (free_cu_cleanup
);
4002 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4003 So we have to manually free the abbrev table. */
4004 dwarf2_free_abbrev_table (cu
);
4006 /* Link this CU into read_in_chain. */
4007 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4008 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4011 do_cleanups (free_cu_cleanup
);
4014 do_cleanups (cleanups
);
4017 /* Read CU/TU THIS_CU in section SECTION,
4018 but do not follow DW_AT_GNU_dwo_name if present.
4019 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
4020 have already done the lookup to find the DWO file).
4022 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4023 THIS_CU->is_debug_types, but nothing else.
4025 We fill in THIS_CU->length.
4027 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4028 linker) then DIE_READER_FUNC will not get called.
4030 THIS_CU->cu is always freed when done.
4031 This is done in order to not leave THIS_CU->cu in a state where we have
4032 to care whether it refers to the "main" CU or the DWO CU. */
4035 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4036 struct dwarf2_section_info
*abbrev_section
,
4037 struct dwo_file
*dwo_file
,
4038 die_reader_func_ftype
*die_reader_func
,
4041 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4042 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4043 bfd
*abfd
= section
->asection
->owner
;
4044 struct dwarf2_cu cu
;
4045 gdb_byte
*begin_info_ptr
, *info_ptr
;
4046 struct die_reader_specs reader
;
4047 struct cleanup
*cleanups
;
4048 struct die_info
*comp_unit_die
;
4051 gdb_assert (this_cu
->cu
== NULL
);
4053 /* This is cheap if the section is already read in. */
4054 dwarf2_read_section (objfile
, section
);
4056 init_one_comp_unit (&cu
, this_cu
);
4058 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4060 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4061 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
, info_ptr
,
4062 this_cu
->is_debug_types
);
4064 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
4066 /* Skip dummy compilation units. */
4067 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4068 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4070 do_cleanups (cleanups
);
4074 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4075 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4077 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4078 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4080 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4082 do_cleanups (cleanups
);
4085 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4086 does not lookup the specified DWO file.
4087 This cannot be used to read DWO files.
4089 THIS_CU->cu is always freed when done.
4090 This is done in order to not leave THIS_CU->cu in a state where we have
4091 to care whether it refers to the "main" CU or the DWO CU.
4092 We can revisit this if the data shows there's a performance issue. */
4095 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4096 die_reader_func_ftype
*die_reader_func
,
4099 init_cutu_and_read_dies_no_follow (this_cu
,
4100 &dwarf2_per_objfile
->abbrev
,
4102 die_reader_func
, data
);
4105 /* die_reader_func for process_psymtab_comp_unit. */
4108 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4110 struct die_info
*comp_unit_die
,
4114 struct dwarf2_cu
*cu
= reader
->cu
;
4115 struct objfile
*objfile
= cu
->objfile
;
4116 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4117 struct attribute
*attr
;
4119 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4120 struct partial_symtab
*pst
;
4122 const char *filename
;
4123 int *want_partial_unit_ptr
= data
;
4125 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4126 && (want_partial_unit_ptr
== NULL
4127 || !*want_partial_unit_ptr
))
4130 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4132 cu
->list_in_scope
= &file_symbols
;
4134 /* Allocate a new partial symbol table structure. */
4135 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4136 if (attr
== NULL
|| !DW_STRING (attr
))
4139 filename
= DW_STRING (attr
);
4140 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4142 /* TEXTLOW and TEXTHIGH are set below. */
4144 objfile
->global_psymbols
.next
,
4145 objfile
->static_psymbols
.next
);
4146 pst
->psymtabs_addrmap_supported
= 1;
4148 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4150 pst
->dirname
= DW_STRING (attr
);
4152 pst
->read_symtab_private
= per_cu
;
4154 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4156 /* Store the function that reads in the rest of the symbol table. */
4157 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4159 per_cu
->v
.psymtab
= pst
;
4161 dwarf2_find_base_address (comp_unit_die
, cu
);
4163 /* Possibly set the default values of LOWPC and HIGHPC from
4165 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4166 &best_highpc
, cu
, pst
);
4167 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4168 /* Store the contiguous range if it is not empty; it can be empty for
4169 CUs with no code. */
4170 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4171 best_lowpc
+ baseaddr
,
4172 best_highpc
+ baseaddr
- 1, pst
);
4174 /* Check if comp unit has_children.
4175 If so, read the rest of the partial symbols from this comp unit.
4176 If not, there's no more debug_info for this comp unit. */
4179 struct partial_die_info
*first_die
;
4180 CORE_ADDR lowpc
, highpc
;
4182 lowpc
= ((CORE_ADDR
) -1);
4183 highpc
= ((CORE_ADDR
) 0);
4185 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4187 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4190 /* If we didn't find a lowpc, set it to highpc to avoid
4191 complaints from `maint check'. */
4192 if (lowpc
== ((CORE_ADDR
) -1))
4195 /* If the compilation unit didn't have an explicit address range,
4196 then use the information extracted from its child dies. */
4200 best_highpc
= highpc
;
4203 pst
->textlow
= best_lowpc
+ baseaddr
;
4204 pst
->texthigh
= best_highpc
+ baseaddr
;
4206 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4207 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4208 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4209 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4210 sort_pst_symbols (pst
);
4212 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
4215 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4216 struct dwarf2_per_cu_data
*iter
;
4218 /* Fill in 'dependencies' here; we fill in 'users' in a
4220 pst
->number_of_dependencies
= len
;
4221 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4222 len
* sizeof (struct symtab
*));
4224 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
4227 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4229 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4232 if (per_cu
->is_debug_types
)
4234 /* It's not clear we want to do anything with stmt lists here.
4235 Waiting to see what gcc ultimately does. */
4239 /* Get the list of files included in the current compilation unit,
4240 and build a psymtab for each of them. */
4241 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4245 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4246 Process compilation unit THIS_CU for a psymtab. */
4249 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4250 int want_partial_unit
)
4252 /* If this compilation unit was already read in, free the
4253 cached copy in order to read it in again. This is
4254 necessary because we skipped some symbols when we first
4255 read in the compilation unit (see load_partial_dies).
4256 This problem could be avoided, but the benefit is unclear. */
4257 if (this_cu
->cu
!= NULL
)
4258 free_one_cached_comp_unit (this_cu
);
4260 gdb_assert (! this_cu
->is_debug_types
);
4261 init_cutu_and_read_dies (this_cu
, 0, 0, process_psymtab_comp_unit_reader
,
4262 &want_partial_unit
);
4264 /* Age out any secondary CUs. */
4265 age_cached_comp_units ();
4268 /* Traversal function for htab_traverse_noresize.
4269 Process one .debug_types comp-unit. */
4272 process_psymtab_type_unit (void **slot
, void *info
)
4274 struct signatured_type
*sig_type
= (struct signatured_type
*) *slot
;
4275 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
4277 gdb_assert (per_cu
->is_debug_types
);
4278 gdb_assert (info
== NULL
);
4280 /* If this compilation unit was already read in, free the
4281 cached copy in order to read it in again. This is
4282 necessary because we skipped some symbols when we first
4283 read in the compilation unit (see load_partial_dies).
4284 This problem could be avoided, but the benefit is unclear. */
4285 if (per_cu
->cu
!= NULL
)
4286 free_one_cached_comp_unit (per_cu
);
4288 init_cutu_and_read_dies (per_cu
, 0, 0, process_psymtab_comp_unit_reader
,
4291 /* Age out any secondary CUs. */
4292 age_cached_comp_units ();
4297 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4298 Build partial symbol tables for the .debug_types comp-units. */
4301 build_type_psymtabs (struct objfile
*objfile
)
4303 if (! create_all_type_units (objfile
))
4306 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
4307 process_psymtab_type_unit
, NULL
);
4310 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
4313 psymtabs_addrmap_cleanup (void *o
)
4315 struct objfile
*objfile
= o
;
4317 objfile
->psymtabs_addrmap
= NULL
;
4320 /* Compute the 'user' field for each psymtab in OBJFILE. */
4323 set_partial_user (struct objfile
*objfile
)
4327 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4329 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4330 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4333 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
4335 /* Set the 'user' field only if it is not already set. */
4336 if (pst
->dependencies
[j
]->user
== NULL
)
4337 pst
->dependencies
[j
]->user
= pst
;
4342 /* Build the partial symbol table by doing a quick pass through the
4343 .debug_info and .debug_abbrev sections. */
4346 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
4348 struct cleanup
*back_to
, *addrmap_cleanup
;
4349 struct obstack temp_obstack
;
4352 dwarf2_per_objfile
->reading_partial_symbols
= 1;
4354 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4356 /* Any cached compilation units will be linked by the per-objfile
4357 read_in_chain. Make sure to free them when we're done. */
4358 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
4360 build_type_psymtabs (objfile
);
4362 create_all_comp_units (objfile
);
4364 /* Create a temporary address map on a temporary obstack. We later
4365 copy this to the final obstack. */
4366 obstack_init (&temp_obstack
);
4367 make_cleanup_obstack_free (&temp_obstack
);
4368 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
4369 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
4371 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4373 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4375 process_psymtab_comp_unit (per_cu
, 0);
4378 set_partial_user (objfile
);
4380 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
4381 &objfile
->objfile_obstack
);
4382 discard_cleanups (addrmap_cleanup
);
4384 do_cleanups (back_to
);
4387 /* die_reader_func for load_partial_comp_unit. */
4390 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
4392 struct die_info
*comp_unit_die
,
4396 struct dwarf2_cu
*cu
= reader
->cu
;
4398 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4400 /* Check if comp unit has_children.
4401 If so, read the rest of the partial symbols from this comp unit.
4402 If not, there's no more debug_info for this comp unit. */
4404 load_partial_dies (reader
, info_ptr
, 0);
4407 /* Load the partial DIEs for a secondary CU into memory.
4408 This is also used when rereading a primary CU with load_all_dies. */
4411 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
4413 init_cutu_and_read_dies (this_cu
, 1, 1, load_partial_comp_unit_reader
, NULL
);
4416 /* Create a list of all compilation units in OBJFILE.
4417 This is only done for -readnow and building partial symtabs. */
4420 create_all_comp_units (struct objfile
*objfile
)
4424 struct dwarf2_per_cu_data
**all_comp_units
;
4427 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4428 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
4432 all_comp_units
= xmalloc (n_allocated
4433 * sizeof (struct dwarf2_per_cu_data
*));
4435 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
4436 + dwarf2_per_objfile
->info
.size
)
4438 unsigned int length
, initial_length_size
;
4439 struct dwarf2_per_cu_data
*this_cu
;
4442 offset
.sect_off
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
4444 /* Read just enough information to find out where the next
4445 compilation unit is. */
4446 length
= read_initial_length (objfile
->obfd
, info_ptr
,
4447 &initial_length_size
);
4449 /* Save the compilation unit for later lookup. */
4450 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
4451 sizeof (struct dwarf2_per_cu_data
));
4452 memset (this_cu
, 0, sizeof (*this_cu
));
4453 this_cu
->offset
= offset
;
4454 this_cu
->length
= length
+ initial_length_size
;
4455 this_cu
->objfile
= objfile
;
4456 this_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
4458 if (n_comp_units
== n_allocated
)
4461 all_comp_units
= xrealloc (all_comp_units
,
4463 * sizeof (struct dwarf2_per_cu_data
*));
4465 all_comp_units
[n_comp_units
++] = this_cu
;
4467 info_ptr
= info_ptr
+ this_cu
->length
;
4470 dwarf2_per_objfile
->all_comp_units
4471 = obstack_alloc (&objfile
->objfile_obstack
,
4472 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
4473 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
4474 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
4475 xfree (all_comp_units
);
4476 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
4479 /* Process all loaded DIEs for compilation unit CU, starting at
4480 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
4481 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
4482 DW_AT_ranges). If NEED_PC is set, then this function will set
4483 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
4484 and record the covered ranges in the addrmap. */
4487 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
4488 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4490 struct partial_die_info
*pdi
;
4492 /* Now, march along the PDI's, descending into ones which have
4493 interesting children but skipping the children of the other ones,
4494 until we reach the end of the compilation unit. */
4500 fixup_partial_die (pdi
, cu
);
4502 /* Anonymous namespaces or modules have no name but have interesting
4503 children, so we need to look at them. Ditto for anonymous
4506 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
4507 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
4508 || pdi
->tag
== DW_TAG_imported_unit
)
4512 case DW_TAG_subprogram
:
4513 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4515 case DW_TAG_constant
:
4516 case DW_TAG_variable
:
4517 case DW_TAG_typedef
:
4518 case DW_TAG_union_type
:
4519 if (!pdi
->is_declaration
)
4521 add_partial_symbol (pdi
, cu
);
4524 case DW_TAG_class_type
:
4525 case DW_TAG_interface_type
:
4526 case DW_TAG_structure_type
:
4527 if (!pdi
->is_declaration
)
4529 add_partial_symbol (pdi
, cu
);
4532 case DW_TAG_enumeration_type
:
4533 if (!pdi
->is_declaration
)
4534 add_partial_enumeration (pdi
, cu
);
4536 case DW_TAG_base_type
:
4537 case DW_TAG_subrange_type
:
4538 /* File scope base type definitions are added to the partial
4540 add_partial_symbol (pdi
, cu
);
4542 case DW_TAG_namespace
:
4543 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
4546 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
4548 case DW_TAG_imported_unit
:
4550 struct dwarf2_per_cu_data
*per_cu
;
4552 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
4555 /* Go read the partial unit, if needed. */
4556 if (per_cu
->v
.psymtab
== NULL
)
4557 process_psymtab_comp_unit (per_cu
, 1);
4559 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
4568 /* If the die has a sibling, skip to the sibling. */
4570 pdi
= pdi
->die_sibling
;
4574 /* Functions used to compute the fully scoped name of a partial DIE.
4576 Normally, this is simple. For C++, the parent DIE's fully scoped
4577 name is concatenated with "::" and the partial DIE's name. For
4578 Java, the same thing occurs except that "." is used instead of "::".
4579 Enumerators are an exception; they use the scope of their parent
4580 enumeration type, i.e. the name of the enumeration type is not
4581 prepended to the enumerator.
4583 There are two complexities. One is DW_AT_specification; in this
4584 case "parent" means the parent of the target of the specification,
4585 instead of the direct parent of the DIE. The other is compilers
4586 which do not emit DW_TAG_namespace; in this case we try to guess
4587 the fully qualified name of structure types from their members'
4588 linkage names. This must be done using the DIE's children rather
4589 than the children of any DW_AT_specification target. We only need
4590 to do this for structures at the top level, i.e. if the target of
4591 any DW_AT_specification (if any; otherwise the DIE itself) does not
4594 /* Compute the scope prefix associated with PDI's parent, in
4595 compilation unit CU. The result will be allocated on CU's
4596 comp_unit_obstack, or a copy of the already allocated PDI->NAME
4597 field. NULL is returned if no prefix is necessary. */
4599 partial_die_parent_scope (struct partial_die_info
*pdi
,
4600 struct dwarf2_cu
*cu
)
4602 char *grandparent_scope
;
4603 struct partial_die_info
*parent
, *real_pdi
;
4605 /* We need to look at our parent DIE; if we have a DW_AT_specification,
4606 then this means the parent of the specification DIE. */
4609 while (real_pdi
->has_specification
)
4610 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
4612 parent
= real_pdi
->die_parent
;
4616 if (parent
->scope_set
)
4617 return parent
->scope
;
4619 fixup_partial_die (parent
, cu
);
4621 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
4623 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
4624 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
4625 Work around this problem here. */
4626 if (cu
->language
== language_cplus
4627 && parent
->tag
== DW_TAG_namespace
4628 && strcmp (parent
->name
, "::") == 0
4629 && grandparent_scope
== NULL
)
4631 parent
->scope
= NULL
;
4632 parent
->scope_set
= 1;
4636 if (pdi
->tag
== DW_TAG_enumerator
)
4637 /* Enumerators should not get the name of the enumeration as a prefix. */
4638 parent
->scope
= grandparent_scope
;
4639 else if (parent
->tag
== DW_TAG_namespace
4640 || parent
->tag
== DW_TAG_module
4641 || parent
->tag
== DW_TAG_structure_type
4642 || parent
->tag
== DW_TAG_class_type
4643 || parent
->tag
== DW_TAG_interface_type
4644 || parent
->tag
== DW_TAG_union_type
4645 || parent
->tag
== DW_TAG_enumeration_type
)
4647 if (grandparent_scope
== NULL
)
4648 parent
->scope
= parent
->name
;
4650 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
4652 parent
->name
, 0, cu
);
4656 /* FIXME drow/2004-04-01: What should we be doing with
4657 function-local names? For partial symbols, we should probably be
4659 complaint (&symfile_complaints
,
4660 _("unhandled containing DIE tag %d for DIE at %d"),
4661 parent
->tag
, pdi
->offset
.sect_off
);
4662 parent
->scope
= grandparent_scope
;
4665 parent
->scope_set
= 1;
4666 return parent
->scope
;
4669 /* Return the fully scoped name associated with PDI, from compilation unit
4670 CU. The result will be allocated with malloc. */
4673 partial_die_full_name (struct partial_die_info
*pdi
,
4674 struct dwarf2_cu
*cu
)
4678 /* If this is a template instantiation, we can not work out the
4679 template arguments from partial DIEs. So, unfortunately, we have
4680 to go through the full DIEs. At least any work we do building
4681 types here will be reused if full symbols are loaded later. */
4682 if (pdi
->has_template_arguments
)
4684 fixup_partial_die (pdi
, cu
);
4686 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
4688 struct die_info
*die
;
4689 struct attribute attr
;
4690 struct dwarf2_cu
*ref_cu
= cu
;
4692 /* DW_FORM_ref_addr is using section offset. */
4694 attr
.form
= DW_FORM_ref_addr
;
4695 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
4696 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
4698 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
4702 parent_scope
= partial_die_parent_scope (pdi
, cu
);
4703 if (parent_scope
== NULL
)
4706 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
4710 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
4712 struct objfile
*objfile
= cu
->objfile
;
4714 char *actual_name
= NULL
;
4716 int built_actual_name
= 0;
4718 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4720 actual_name
= partial_die_full_name (pdi
, cu
);
4722 built_actual_name
= 1;
4724 if (actual_name
== NULL
)
4725 actual_name
= pdi
->name
;
4729 case DW_TAG_subprogram
:
4730 if (pdi
->is_external
|| cu
->language
== language_ada
)
4732 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
4733 of the global scope. But in Ada, we want to be able to access
4734 nested procedures globally. So all Ada subprograms are stored
4735 in the global scope. */
4736 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4737 mst_text, objfile); */
4738 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4740 VAR_DOMAIN
, LOC_BLOCK
,
4741 &objfile
->global_psymbols
,
4742 0, pdi
->lowpc
+ baseaddr
,
4743 cu
->language
, objfile
);
4747 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4748 mst_file_text, objfile); */
4749 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4751 VAR_DOMAIN
, LOC_BLOCK
,
4752 &objfile
->static_psymbols
,
4753 0, pdi
->lowpc
+ baseaddr
,
4754 cu
->language
, objfile
);
4757 case DW_TAG_constant
:
4759 struct psymbol_allocation_list
*list
;
4761 if (pdi
->is_external
)
4762 list
= &objfile
->global_psymbols
;
4764 list
= &objfile
->static_psymbols
;
4765 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4766 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
4767 list
, 0, 0, cu
->language
, objfile
);
4770 case DW_TAG_variable
:
4772 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
4776 && !dwarf2_per_objfile
->has_section_at_zero
)
4778 /* A global or static variable may also have been stripped
4779 out by the linker if unused, in which case its address
4780 will be nullified; do not add such variables into partial
4781 symbol table then. */
4783 else if (pdi
->is_external
)
4786 Don't enter into the minimal symbol tables as there is
4787 a minimal symbol table entry from the ELF symbols already.
4788 Enter into partial symbol table if it has a location
4789 descriptor or a type.
4790 If the location descriptor is missing, new_symbol will create
4791 a LOC_UNRESOLVED symbol, the address of the variable will then
4792 be determined from the minimal symbol table whenever the variable
4794 The address for the partial symbol table entry is not
4795 used by GDB, but it comes in handy for debugging partial symbol
4798 if (pdi
->d
.locdesc
|| pdi
->has_type
)
4799 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4801 VAR_DOMAIN
, LOC_STATIC
,
4802 &objfile
->global_psymbols
,
4804 cu
->language
, objfile
);
4808 /* Static Variable. Skip symbols without location descriptors. */
4809 if (pdi
->d
.locdesc
== NULL
)
4811 if (built_actual_name
)
4812 xfree (actual_name
);
4815 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
4816 mst_file_data, objfile); */
4817 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4819 VAR_DOMAIN
, LOC_STATIC
,
4820 &objfile
->static_psymbols
,
4822 cu
->language
, objfile
);
4825 case DW_TAG_typedef
:
4826 case DW_TAG_base_type
:
4827 case DW_TAG_subrange_type
:
4828 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4830 VAR_DOMAIN
, LOC_TYPEDEF
,
4831 &objfile
->static_psymbols
,
4832 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4834 case DW_TAG_namespace
:
4835 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4837 VAR_DOMAIN
, LOC_TYPEDEF
,
4838 &objfile
->global_psymbols
,
4839 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4841 case DW_TAG_class_type
:
4842 case DW_TAG_interface_type
:
4843 case DW_TAG_structure_type
:
4844 case DW_TAG_union_type
:
4845 case DW_TAG_enumeration_type
:
4846 /* Skip external references. The DWARF standard says in the section
4847 about "Structure, Union, and Class Type Entries": "An incomplete
4848 structure, union or class type is represented by a structure,
4849 union or class entry that does not have a byte size attribute
4850 and that has a DW_AT_declaration attribute." */
4851 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
4853 if (built_actual_name
)
4854 xfree (actual_name
);
4858 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
4859 static vs. global. */
4860 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4862 STRUCT_DOMAIN
, LOC_TYPEDEF
,
4863 (cu
->language
== language_cplus
4864 || cu
->language
== language_java
)
4865 ? &objfile
->global_psymbols
4866 : &objfile
->static_psymbols
,
4867 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4870 case DW_TAG_enumerator
:
4871 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4873 VAR_DOMAIN
, LOC_CONST
,
4874 (cu
->language
== language_cplus
4875 || cu
->language
== language_java
)
4876 ? &objfile
->global_psymbols
4877 : &objfile
->static_psymbols
,
4878 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4884 if (built_actual_name
)
4885 xfree (actual_name
);
4888 /* Read a partial die corresponding to a namespace; also, add a symbol
4889 corresponding to that namespace to the symbol table. NAMESPACE is
4890 the name of the enclosing namespace. */
4893 add_partial_namespace (struct partial_die_info
*pdi
,
4894 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4895 int need_pc
, struct dwarf2_cu
*cu
)
4897 /* Add a symbol for the namespace. */
4899 add_partial_symbol (pdi
, cu
);
4901 /* Now scan partial symbols in that namespace. */
4903 if (pdi
->has_children
)
4904 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4907 /* Read a partial die corresponding to a Fortran module. */
4910 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
4911 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4913 /* Now scan partial symbols in that module. */
4915 if (pdi
->has_children
)
4916 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4919 /* Read a partial die corresponding to a subprogram and create a partial
4920 symbol for that subprogram. When the CU language allows it, this
4921 routine also defines a partial symbol for each nested subprogram
4922 that this subprogram contains.
4924 DIE my also be a lexical block, in which case we simply search
4925 recursively for suprograms defined inside that lexical block.
4926 Again, this is only performed when the CU language allows this
4927 type of definitions. */
4930 add_partial_subprogram (struct partial_die_info
*pdi
,
4931 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4932 int need_pc
, struct dwarf2_cu
*cu
)
4934 if (pdi
->tag
== DW_TAG_subprogram
)
4936 if (pdi
->has_pc_info
)
4938 if (pdi
->lowpc
< *lowpc
)
4939 *lowpc
= pdi
->lowpc
;
4940 if (pdi
->highpc
> *highpc
)
4941 *highpc
= pdi
->highpc
;
4945 struct objfile
*objfile
= cu
->objfile
;
4947 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4948 SECT_OFF_TEXT (objfile
));
4949 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4950 pdi
->lowpc
+ baseaddr
,
4951 pdi
->highpc
- 1 + baseaddr
,
4952 cu
->per_cu
->v
.psymtab
);
4956 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
4958 if (!pdi
->is_declaration
)
4959 /* Ignore subprogram DIEs that do not have a name, they are
4960 illegal. Do not emit a complaint at this point, we will
4961 do so when we convert this psymtab into a symtab. */
4963 add_partial_symbol (pdi
, cu
);
4967 if (! pdi
->has_children
)
4970 if (cu
->language
== language_ada
)
4972 pdi
= pdi
->die_child
;
4975 fixup_partial_die (pdi
, cu
);
4976 if (pdi
->tag
== DW_TAG_subprogram
4977 || pdi
->tag
== DW_TAG_lexical_block
)
4978 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4979 pdi
= pdi
->die_sibling
;
4984 /* Read a partial die corresponding to an enumeration type. */
4987 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4988 struct dwarf2_cu
*cu
)
4990 struct partial_die_info
*pdi
;
4992 if (enum_pdi
->name
!= NULL
)
4993 add_partial_symbol (enum_pdi
, cu
);
4995 pdi
= enum_pdi
->die_child
;
4998 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4999 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5001 add_partial_symbol (pdi
, cu
);
5002 pdi
= pdi
->die_sibling
;
5006 /* Return the initial uleb128 in the die at INFO_PTR. */
5009 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
5011 unsigned int bytes_read
;
5013 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5016 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
5017 Return the corresponding abbrev, or NULL if the number is zero (indicating
5018 an empty DIE). In either case *BYTES_READ will be set to the length of
5019 the initial number. */
5021 static struct abbrev_info
*
5022 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
5023 struct dwarf2_cu
*cu
)
5025 bfd
*abfd
= cu
->objfile
->obfd
;
5026 unsigned int abbrev_number
;
5027 struct abbrev_info
*abbrev
;
5029 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
5031 if (abbrev_number
== 0)
5034 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5037 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
5038 abbrev_number
, bfd_get_filename (abfd
));
5044 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5045 Returns a pointer to the end of a series of DIEs, terminated by an empty
5046 DIE. Any children of the skipped DIEs will also be skipped. */
5049 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
5051 struct dwarf2_cu
*cu
= reader
->cu
;
5052 struct abbrev_info
*abbrev
;
5053 unsigned int bytes_read
;
5057 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5059 return info_ptr
+ bytes_read
;
5061 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
5065 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5066 INFO_PTR should point just after the initial uleb128 of a DIE, and the
5067 abbrev corresponding to that skipped uleb128 should be passed in
5068 ABBREV. Returns a pointer to this DIE's sibling, skipping any
5072 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
5073 struct abbrev_info
*abbrev
)
5075 unsigned int bytes_read
;
5076 struct attribute attr
;
5077 bfd
*abfd
= reader
->abfd
;
5078 struct dwarf2_cu
*cu
= reader
->cu
;
5079 gdb_byte
*buffer
= reader
->buffer
;
5080 const gdb_byte
*buffer_end
= reader
->buffer_end
;
5081 gdb_byte
*start_info_ptr
= info_ptr
;
5082 unsigned int form
, i
;
5084 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
5086 /* The only abbrev we care about is DW_AT_sibling. */
5087 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
5089 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
5090 if (attr
.form
== DW_FORM_ref_addr
)
5091 complaint (&symfile_complaints
,
5092 _("ignoring absolute DW_AT_sibling"));
5094 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
5097 /* If it isn't DW_AT_sibling, skip this attribute. */
5098 form
= abbrev
->attrs
[i
].form
;
5102 case DW_FORM_ref_addr
:
5103 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
5104 and later it is offset sized. */
5105 if (cu
->header
.version
== 2)
5106 info_ptr
+= cu
->header
.addr_size
;
5108 info_ptr
+= cu
->header
.offset_size
;
5111 info_ptr
+= cu
->header
.addr_size
;
5118 case DW_FORM_flag_present
:
5130 case DW_FORM_ref_sig8
:
5133 case DW_FORM_string
:
5134 read_direct_string (abfd
, info_ptr
, &bytes_read
);
5135 info_ptr
+= bytes_read
;
5137 case DW_FORM_sec_offset
:
5139 info_ptr
+= cu
->header
.offset_size
;
5141 case DW_FORM_exprloc
:
5143 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5144 info_ptr
+= bytes_read
;
5146 case DW_FORM_block1
:
5147 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
5149 case DW_FORM_block2
:
5150 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
5152 case DW_FORM_block4
:
5153 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
5157 case DW_FORM_ref_udata
:
5158 case DW_FORM_GNU_addr_index
:
5159 case DW_FORM_GNU_str_index
:
5160 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
5162 case DW_FORM_indirect
:
5163 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5164 info_ptr
+= bytes_read
;
5165 /* We need to continue parsing from here, so just go back to
5167 goto skip_attribute
;
5170 error (_("Dwarf Error: Cannot handle %s "
5171 "in DWARF reader [in module %s]"),
5172 dwarf_form_name (form
),
5173 bfd_get_filename (abfd
));
5177 if (abbrev
->has_children
)
5178 return skip_children (reader
, info_ptr
);
5183 /* Locate ORIG_PDI's sibling.
5184 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
5187 locate_pdi_sibling (const struct die_reader_specs
*reader
,
5188 struct partial_die_info
*orig_pdi
,
5191 /* Do we know the sibling already? */
5193 if (orig_pdi
->sibling
)
5194 return orig_pdi
->sibling
;
5196 /* Are there any children to deal with? */
5198 if (!orig_pdi
->has_children
)
5201 /* Skip the children the long way. */
5203 return skip_children (reader
, info_ptr
);
5206 /* Expand this partial symbol table into a full symbol table. */
5209 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
5215 warning (_("bug: psymtab for %s is already read in."),
5222 printf_filtered (_("Reading in symbols for %s..."),
5224 gdb_flush (gdb_stdout
);
5227 /* Restore our global data. */
5228 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
5229 dwarf2_objfile_data_key
);
5231 /* If this psymtab is constructed from a debug-only objfile, the
5232 has_section_at_zero flag will not necessarily be correct. We
5233 can get the correct value for this flag by looking at the data
5234 associated with the (presumably stripped) associated objfile. */
5235 if (pst
->objfile
->separate_debug_objfile_backlink
)
5237 struct dwarf2_per_objfile
*dpo_backlink
5238 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
5239 dwarf2_objfile_data_key
);
5241 dwarf2_per_objfile
->has_section_at_zero
5242 = dpo_backlink
->has_section_at_zero
;
5245 dwarf2_per_objfile
->reading_partial_symbols
= 0;
5247 psymtab_to_symtab_1 (pst
);
5249 /* Finish up the debug error message. */
5251 printf_filtered (_("done.\n"));
5255 process_cu_includes ();
5258 /* Reading in full CUs. */
5260 /* Add PER_CU to the queue. */
5263 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
5264 enum language pretend_language
)
5266 struct dwarf2_queue_item
*item
;
5269 item
= xmalloc (sizeof (*item
));
5270 item
->per_cu
= per_cu
;
5271 item
->pretend_language
= pretend_language
;
5274 if (dwarf2_queue
== NULL
)
5275 dwarf2_queue
= item
;
5277 dwarf2_queue_tail
->next
= item
;
5279 dwarf2_queue_tail
= item
;
5282 /* Process the queue. */
5285 process_queue (void)
5287 struct dwarf2_queue_item
*item
, *next_item
;
5289 /* The queue starts out with one item, but following a DIE reference
5290 may load a new CU, adding it to the end of the queue. */
5291 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
5293 if (dwarf2_per_objfile
->using_index
5294 ? !item
->per_cu
->v
.quick
->symtab
5295 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
5296 process_full_comp_unit (item
->per_cu
, item
->pretend_language
);
5298 item
->per_cu
->queued
= 0;
5299 next_item
= item
->next
;
5303 dwarf2_queue_tail
= NULL
;
5306 /* Free all allocated queue entries. This function only releases anything if
5307 an error was thrown; if the queue was processed then it would have been
5308 freed as we went along. */
5311 dwarf2_release_queue (void *dummy
)
5313 struct dwarf2_queue_item
*item
, *last
;
5315 item
= dwarf2_queue
;
5318 /* Anything still marked queued is likely to be in an
5319 inconsistent state, so discard it. */
5320 if (item
->per_cu
->queued
)
5322 if (item
->per_cu
->cu
!= NULL
)
5323 free_one_cached_comp_unit (item
->per_cu
);
5324 item
->per_cu
->queued
= 0;
5332 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
5335 /* Read in full symbols for PST, and anything it depends on. */
5338 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
5340 struct dwarf2_per_cu_data
*per_cu
;
5346 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
5347 if (!pst
->dependencies
[i
]->readin
5348 && pst
->dependencies
[i
]->user
== NULL
)
5350 /* Inform about additional files that need to be read in. */
5353 /* FIXME: i18n: Need to make this a single string. */
5354 fputs_filtered (" ", gdb_stdout
);
5356 fputs_filtered ("and ", gdb_stdout
);
5358 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
5359 wrap_here (""); /* Flush output. */
5360 gdb_flush (gdb_stdout
);
5362 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
5365 per_cu
= pst
->read_symtab_private
;
5369 /* It's an include file, no symbols to read for it.
5370 Everything is in the parent symtab. */
5375 dw2_do_instantiate_symtab (per_cu
);
5378 /* Trivial hash function for die_info: the hash value of a DIE
5379 is its offset in .debug_info for this objfile. */
5382 die_hash (const void *item
)
5384 const struct die_info
*die
= item
;
5386 return die
->offset
.sect_off
;
5389 /* Trivial comparison function for die_info structures: two DIEs
5390 are equal if they have the same offset. */
5393 die_eq (const void *item_lhs
, const void *item_rhs
)
5395 const struct die_info
*die_lhs
= item_lhs
;
5396 const struct die_info
*die_rhs
= item_rhs
;
5398 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
5401 /* die_reader_func for load_full_comp_unit.
5402 This is identical to read_signatured_type_reader,
5403 but is kept separate for now. */
5406 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
5408 struct die_info
*comp_unit_die
,
5412 struct dwarf2_cu
*cu
= reader
->cu
;
5413 enum language
*language_ptr
= data
;
5415 gdb_assert (cu
->die_hash
== NULL
);
5417 htab_create_alloc_ex (cu
->header
.length
/ 12,
5421 &cu
->comp_unit_obstack
,
5422 hashtab_obstack_allocate
,
5423 dummy_obstack_deallocate
);
5426 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
5427 &info_ptr
, comp_unit_die
);
5428 cu
->dies
= comp_unit_die
;
5429 /* comp_unit_die is not stored in die_hash, no need. */
5431 /* We try not to read any attributes in this function, because not
5432 all CUs needed for references have been loaded yet, and symbol
5433 table processing isn't initialized. But we have to set the CU language,
5434 or we won't be able to build types correctly.
5435 Similarly, if we do not read the producer, we can not apply
5436 producer-specific interpretation. */
5437 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
5440 /* Load the DIEs associated with PER_CU into memory. */
5443 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5444 enum language pretend_language
)
5446 gdb_assert (! this_cu
->is_debug_types
);
5448 init_cutu_and_read_dies (this_cu
, 1, 1, load_full_comp_unit_reader
,
5452 /* Add a DIE to the delayed physname list. */
5455 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
5456 const char *name
, struct die_info
*die
,
5457 struct dwarf2_cu
*cu
)
5459 struct delayed_method_info mi
;
5461 mi
.fnfield_index
= fnfield_index
;
5465 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
5468 /* A cleanup for freeing the delayed method list. */
5471 free_delayed_list (void *ptr
)
5473 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
5474 if (cu
->method_list
!= NULL
)
5476 VEC_free (delayed_method_info
, cu
->method_list
);
5477 cu
->method_list
= NULL
;
5481 /* Compute the physnames of any methods on the CU's method list.
5483 The computation of method physnames is delayed in order to avoid the
5484 (bad) condition that one of the method's formal parameters is of an as yet
5488 compute_delayed_physnames (struct dwarf2_cu
*cu
)
5491 struct delayed_method_info
*mi
;
5492 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
5494 const char *physname
;
5495 struct fn_fieldlist
*fn_flp
5496 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
5497 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
5498 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
5502 /* Go objects should be embedded in a DW_TAG_module DIE,
5503 and it's not clear if/how imported objects will appear.
5504 To keep Go support simple until that's worked out,
5505 go back through what we've read and create something usable.
5506 We could do this while processing each DIE, and feels kinda cleaner,
5507 but that way is more invasive.
5508 This is to, for example, allow the user to type "p var" or "b main"
5509 without having to specify the package name, and allow lookups
5510 of module.object to work in contexts that use the expression
5514 fixup_go_packaging (struct dwarf2_cu
*cu
)
5516 char *package_name
= NULL
;
5517 struct pending
*list
;
5520 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
5522 for (i
= 0; i
< list
->nsyms
; ++i
)
5524 struct symbol
*sym
= list
->symbol
[i
];
5526 if (SYMBOL_LANGUAGE (sym
) == language_go
5527 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
5529 char *this_package_name
= go_symbol_package_name (sym
);
5531 if (this_package_name
== NULL
)
5533 if (package_name
== NULL
)
5534 package_name
= this_package_name
;
5537 if (strcmp (package_name
, this_package_name
) != 0)
5538 complaint (&symfile_complaints
,
5539 _("Symtab %s has objects from two different Go packages: %s and %s"),
5540 (sym
->symtab
&& sym
->symtab
->filename
5541 ? sym
->symtab
->filename
5542 : cu
->objfile
->name
),
5543 this_package_name
, package_name
);
5544 xfree (this_package_name
);
5550 if (package_name
!= NULL
)
5552 struct objfile
*objfile
= cu
->objfile
;
5553 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
5554 package_name
, objfile
);
5557 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5559 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5560 SYMBOL_SET_LANGUAGE (sym
, language_go
);
5561 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
5562 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
5563 e.g., "main" finds the "main" module and not C's main(). */
5564 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
5565 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5566 SYMBOL_TYPE (sym
) = type
;
5568 add_symbol_to_list (sym
, &global_symbols
);
5570 xfree (package_name
);
5574 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
5576 /* Return the symtab for PER_CU. This works properly regardless of
5577 whether we're using the index or psymtabs. */
5579 static struct symtab
*
5580 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
5582 return (dwarf2_per_objfile
->using_index
5583 ? per_cu
->v
.quick
->symtab
5584 : per_cu
->v
.psymtab
->symtab
);
5587 /* A helper function for computing the list of all symbol tables
5588 included by PER_CU. */
5591 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
5592 htab_t all_children
,
5593 struct dwarf2_per_cu_data
*per_cu
)
5597 struct dwarf2_per_cu_data
*iter
;
5599 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
5602 /* This inclusion and its children have been processed. */
5607 /* Only add a CU if it has a symbol table. */
5608 if (get_symtab (per_cu
) != NULL
)
5609 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
5612 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
5614 recursively_compute_inclusions (result
, all_children
, iter
);
5617 /* Compute the symtab 'includes' fields for the symtab related to
5621 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
5623 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
5626 struct dwarf2_per_cu_data
*iter
;
5627 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
5628 htab_t all_children
;
5629 struct symtab
*symtab
= get_symtab (per_cu
);
5631 /* If we don't have a symtab, we can just skip this case. */
5635 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
5636 NULL
, xcalloc
, xfree
);
5639 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
5642 recursively_compute_inclusions (&result_children
, all_children
, iter
);
5644 /* Now we have a transitive closure of all the included CUs, so
5645 we can convert it to a list of symtabs. */
5646 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
5648 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
5649 (len
+ 1) * sizeof (struct symtab
*));
5651 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
5653 symtab
->includes
[ix
] = get_symtab (iter
);
5654 symtab
->includes
[len
] = NULL
;
5656 VEC_free (dwarf2_per_cu_ptr
, result_children
);
5657 htab_delete (all_children
);
5661 /* Compute the 'includes' field for the symtabs of all the CUs we just
5665 process_cu_includes (void)
5668 struct dwarf2_per_cu_data
*iter
;
5671 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
5674 compute_symtab_includes (iter
);
5676 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
5679 /* Generate full symbol information for PER_CU, whose DIEs have
5680 already been loaded into memory. */
5683 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
5684 enum language pretend_language
)
5686 struct dwarf2_cu
*cu
= per_cu
->cu
;
5687 struct objfile
*objfile
= per_cu
->objfile
;
5688 CORE_ADDR lowpc
, highpc
;
5689 struct symtab
*symtab
;
5690 struct cleanup
*back_to
, *delayed_list_cleanup
;
5693 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5696 back_to
= make_cleanup (really_free_pendings
, NULL
);
5697 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
5699 cu
->list_in_scope
= &file_symbols
;
5701 cu
->language
= pretend_language
;
5702 cu
->language_defn
= language_def (cu
->language
);
5704 /* Do line number decoding in read_file_scope () */
5705 process_die (cu
->dies
, cu
);
5707 /* For now fudge the Go package. */
5708 if (cu
->language
== language_go
)
5709 fixup_go_packaging (cu
);
5711 /* Now that we have processed all the DIEs in the CU, all the types
5712 should be complete, and it should now be safe to compute all of the
5714 compute_delayed_physnames (cu
);
5715 do_cleanups (delayed_list_cleanup
);
5717 /* Some compilers don't define a DW_AT_high_pc attribute for the
5718 compilation unit. If the DW_AT_high_pc is missing, synthesize
5719 it, by scanning the DIE's below the compilation unit. */
5720 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
5722 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
5726 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
5728 /* Set symtab language to language from DW_AT_language. If the
5729 compilation is from a C file generated by language preprocessors, do
5730 not set the language if it was already deduced by start_subfile. */
5731 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
5732 symtab
->language
= cu
->language
;
5734 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
5735 produce DW_AT_location with location lists but it can be possibly
5736 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
5737 there were bugs in prologue debug info, fixed later in GCC-4.5
5738 by "unwind info for epilogues" patch (which is not directly related).
5740 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
5741 needed, it would be wrong due to missing DW_AT_producer there.
5743 Still one can confuse GDB by using non-standard GCC compilation
5744 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
5746 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
5747 symtab
->locations_valid
= 1;
5749 if (gcc_4_minor
>= 5)
5750 symtab
->epilogue_unwind_valid
= 1;
5752 symtab
->call_site_htab
= cu
->call_site_htab
;
5755 if (dwarf2_per_objfile
->using_index
)
5756 per_cu
->v
.quick
->symtab
= symtab
;
5759 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5760 pst
->symtab
= symtab
;
5764 /* Push it for inclusion processing later. */
5765 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
5767 do_cleanups (back_to
);
5770 /* Process an imported unit DIE. */
5773 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
5775 struct attribute
*attr
;
5777 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5780 struct dwarf2_per_cu_data
*per_cu
;
5781 struct symtab
*imported_symtab
;
5784 offset
= dwarf2_get_ref_die_offset (attr
);
5785 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5787 /* Queue the unit, if needed. */
5788 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
5789 load_full_comp_unit (per_cu
, cu
->language
);
5791 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
5796 /* Process a die and its children. */
5799 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
5803 case DW_TAG_padding
:
5805 case DW_TAG_compile_unit
:
5806 case DW_TAG_partial_unit
:
5807 read_file_scope (die
, cu
);
5809 case DW_TAG_type_unit
:
5810 read_type_unit_scope (die
, cu
);
5812 case DW_TAG_subprogram
:
5813 case DW_TAG_inlined_subroutine
:
5814 read_func_scope (die
, cu
);
5816 case DW_TAG_lexical_block
:
5817 case DW_TAG_try_block
:
5818 case DW_TAG_catch_block
:
5819 read_lexical_block_scope (die
, cu
);
5821 case DW_TAG_GNU_call_site
:
5822 read_call_site_scope (die
, cu
);
5824 case DW_TAG_class_type
:
5825 case DW_TAG_interface_type
:
5826 case DW_TAG_structure_type
:
5827 case DW_TAG_union_type
:
5828 process_structure_scope (die
, cu
);
5830 case DW_TAG_enumeration_type
:
5831 process_enumeration_scope (die
, cu
);
5834 /* These dies have a type, but processing them does not create
5835 a symbol or recurse to process the children. Therefore we can
5836 read them on-demand through read_type_die. */
5837 case DW_TAG_subroutine_type
:
5838 case DW_TAG_set_type
:
5839 case DW_TAG_array_type
:
5840 case DW_TAG_pointer_type
:
5841 case DW_TAG_ptr_to_member_type
:
5842 case DW_TAG_reference_type
:
5843 case DW_TAG_string_type
:
5846 case DW_TAG_base_type
:
5847 case DW_TAG_subrange_type
:
5848 case DW_TAG_typedef
:
5849 /* Add a typedef symbol for the type definition, if it has a
5851 new_symbol (die
, read_type_die (die
, cu
), cu
);
5853 case DW_TAG_common_block
:
5854 read_common_block (die
, cu
);
5856 case DW_TAG_common_inclusion
:
5858 case DW_TAG_namespace
:
5859 processing_has_namespace_info
= 1;
5860 read_namespace (die
, cu
);
5863 processing_has_namespace_info
= 1;
5864 read_module (die
, cu
);
5866 case DW_TAG_imported_declaration
:
5867 case DW_TAG_imported_module
:
5868 processing_has_namespace_info
= 1;
5869 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
5870 || cu
->language
!= language_fortran
))
5871 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
5872 dwarf_tag_name (die
->tag
));
5873 read_import_statement (die
, cu
);
5876 case DW_TAG_imported_unit
:
5877 process_imported_unit_die (die
, cu
);
5881 new_symbol (die
, NULL
, cu
);
5886 /* A helper function for dwarf2_compute_name which determines whether DIE
5887 needs to have the name of the scope prepended to the name listed in the
5891 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5893 struct attribute
*attr
;
5897 case DW_TAG_namespace
:
5898 case DW_TAG_typedef
:
5899 case DW_TAG_class_type
:
5900 case DW_TAG_interface_type
:
5901 case DW_TAG_structure_type
:
5902 case DW_TAG_union_type
:
5903 case DW_TAG_enumeration_type
:
5904 case DW_TAG_enumerator
:
5905 case DW_TAG_subprogram
:
5909 case DW_TAG_variable
:
5910 case DW_TAG_constant
:
5911 /* We only need to prefix "globally" visible variables. These include
5912 any variable marked with DW_AT_external or any variable that
5913 lives in a namespace. [Variables in anonymous namespaces
5914 require prefixing, but they are not DW_AT_external.] */
5916 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
5918 struct dwarf2_cu
*spec_cu
= cu
;
5920 return die_needs_namespace (die_specification (die
, &spec_cu
),
5924 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5925 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
5926 && die
->parent
->tag
!= DW_TAG_module
)
5928 /* A variable in a lexical block of some kind does not need a
5929 namespace, even though in C++ such variables may be external
5930 and have a mangled name. */
5931 if (die
->parent
->tag
== DW_TAG_lexical_block
5932 || die
->parent
->tag
== DW_TAG_try_block
5933 || die
->parent
->tag
== DW_TAG_catch_block
5934 || die
->parent
->tag
== DW_TAG_subprogram
)
5943 /* Retrieve the last character from a mem_file. */
5946 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
5948 char *last_char_p
= (char *) object
;
5951 *last_char_p
= buffer
[length
- 1];
5954 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
5955 compute the physname for the object, which include a method's:
5956 - formal parameters (C++/Java),
5957 - receiver type (Go),
5958 - return type (Java).
5960 The term "physname" is a bit confusing.
5961 For C++, for example, it is the demangled name.
5962 For Go, for example, it's the mangled name.
5964 For Ada, return the DIE's linkage name rather than the fully qualified
5965 name. PHYSNAME is ignored..
5967 The result is allocated on the objfile_obstack and canonicalized. */
5970 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
5973 struct objfile
*objfile
= cu
->objfile
;
5976 name
= dwarf2_name (die
, cu
);
5978 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
5979 compute it by typename_concat inside GDB. */
5980 if (cu
->language
== language_ada
5981 || (cu
->language
== language_fortran
&& physname
))
5983 /* For Ada unit, we prefer the linkage name over the name, as
5984 the former contains the exported name, which the user expects
5985 to be able to reference. Ideally, we want the user to be able
5986 to reference this entity using either natural or linkage name,
5987 but we haven't started looking at this enhancement yet. */
5988 struct attribute
*attr
;
5990 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5992 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5993 if (attr
&& DW_STRING (attr
))
5994 return DW_STRING (attr
);
5997 /* These are the only languages we know how to qualify names in. */
5999 && (cu
->language
== language_cplus
|| cu
->language
== language_java
6000 || cu
->language
== language_fortran
))
6002 if (die_needs_namespace (die
, cu
))
6006 struct ui_file
*buf
;
6008 prefix
= determine_prefix (die
, cu
);
6009 buf
= mem_fileopen ();
6010 if (*prefix
!= '\0')
6012 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
6015 fputs_unfiltered (prefixed_name
, buf
);
6016 xfree (prefixed_name
);
6019 fputs_unfiltered (name
, buf
);
6021 /* Template parameters may be specified in the DIE's DW_AT_name, or
6022 as children with DW_TAG_template_type_param or
6023 DW_TAG_value_type_param. If the latter, add them to the name
6024 here. If the name already has template parameters, then
6025 skip this step; some versions of GCC emit both, and
6026 it is more efficient to use the pre-computed name.
6028 Something to keep in mind about this process: it is very
6029 unlikely, or in some cases downright impossible, to produce
6030 something that will match the mangled name of a function.
6031 If the definition of the function has the same debug info,
6032 we should be able to match up with it anyway. But fallbacks
6033 using the minimal symbol, for instance to find a method
6034 implemented in a stripped copy of libstdc++, will not work.
6035 If we do not have debug info for the definition, we will have to
6036 match them up some other way.
6038 When we do name matching there is a related problem with function
6039 templates; two instantiated function templates are allowed to
6040 differ only by their return types, which we do not add here. */
6042 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
6044 struct attribute
*attr
;
6045 struct die_info
*child
;
6048 die
->building_fullname
= 1;
6050 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
6055 struct dwarf2_locexpr_baton
*baton
;
6058 if (child
->tag
!= DW_TAG_template_type_param
6059 && child
->tag
!= DW_TAG_template_value_param
)
6064 fputs_unfiltered ("<", buf
);
6068 fputs_unfiltered (", ", buf
);
6070 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
6073 complaint (&symfile_complaints
,
6074 _("template parameter missing DW_AT_type"));
6075 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
6078 type
= die_type (child
, cu
);
6080 if (child
->tag
== DW_TAG_template_type_param
)
6082 c_print_type (type
, "", buf
, -1, 0);
6086 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
6089 complaint (&symfile_complaints
,
6090 _("template parameter missing "
6091 "DW_AT_const_value"));
6092 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
6096 dwarf2_const_value_attr (attr
, type
, name
,
6097 &cu
->comp_unit_obstack
, cu
,
6098 &value
, &bytes
, &baton
);
6100 if (TYPE_NOSIGN (type
))
6101 /* GDB prints characters as NUMBER 'CHAR'. If that's
6102 changed, this can use value_print instead. */
6103 c_printchar (value
, type
, buf
);
6106 struct value_print_options opts
;
6109 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
6113 else if (bytes
!= NULL
)
6115 v
= allocate_value (type
);
6116 memcpy (value_contents_writeable (v
), bytes
,
6117 TYPE_LENGTH (type
));
6120 v
= value_from_longest (type
, value
);
6122 /* Specify decimal so that we do not depend on
6124 get_formatted_print_options (&opts
, 'd');
6126 value_print (v
, buf
, &opts
);
6132 die
->building_fullname
= 0;
6136 /* Close the argument list, with a space if necessary
6137 (nested templates). */
6138 char last_char
= '\0';
6139 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
6140 if (last_char
== '>')
6141 fputs_unfiltered (" >", buf
);
6143 fputs_unfiltered (">", buf
);
6147 /* For Java and C++ methods, append formal parameter type
6148 information, if PHYSNAME. */
6150 if (physname
&& die
->tag
== DW_TAG_subprogram
6151 && (cu
->language
== language_cplus
6152 || cu
->language
== language_java
))
6154 struct type
*type
= read_type_die (die
, cu
);
6156 c_type_print_args (type
, buf
, 1, cu
->language
);
6158 if (cu
->language
== language_java
)
6160 /* For java, we must append the return type to method
6162 if (die
->tag
== DW_TAG_subprogram
)
6163 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
6166 else if (cu
->language
== language_cplus
)
6168 /* Assume that an artificial first parameter is
6169 "this", but do not crash if it is not. RealView
6170 marks unnamed (and thus unused) parameters as
6171 artificial; there is no way to differentiate
6173 if (TYPE_NFIELDS (type
) > 0
6174 && TYPE_FIELD_ARTIFICIAL (type
, 0)
6175 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
6176 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
6178 fputs_unfiltered (" const", buf
);
6182 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
6184 ui_file_delete (buf
);
6186 if (cu
->language
== language_cplus
)
6189 = dwarf2_canonicalize_name (name
, cu
,
6190 &objfile
->objfile_obstack
);
6201 /* Return the fully qualified name of DIE, based on its DW_AT_name.
6202 If scope qualifiers are appropriate they will be added. The result
6203 will be allocated on the objfile_obstack, or NULL if the DIE does
6204 not have a name. NAME may either be from a previous call to
6205 dwarf2_name or NULL.
6207 The output string will be canonicalized (if C++/Java). */
6210 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
6212 return dwarf2_compute_name (name
, die
, cu
, 0);
6215 /* Construct a physname for the given DIE in CU. NAME may either be
6216 from a previous call to dwarf2_name or NULL. The result will be
6217 allocated on the objfile_objstack or NULL if the DIE does not have a
6220 The output string will be canonicalized (if C++/Java). */
6223 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
6225 struct objfile
*objfile
= cu
->objfile
;
6226 struct attribute
*attr
;
6227 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
6228 struct cleanup
*back_to
;
6231 /* In this case dwarf2_compute_name is just a shortcut not building anything
6233 if (!die_needs_namespace (die
, cu
))
6234 return dwarf2_compute_name (name
, die
, cu
, 1);
6236 back_to
= make_cleanup (null_cleanup
, NULL
);
6238 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
6240 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
6242 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
6244 if (attr
&& DW_STRING (attr
))
6248 mangled
= DW_STRING (attr
);
6250 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
6251 type. It is easier for GDB users to search for such functions as
6252 `name(params)' than `long name(params)'. In such case the minimal
6253 symbol names do not match the full symbol names but for template
6254 functions there is never a need to look up their definition from their
6255 declaration so the only disadvantage remains the minimal symbol
6256 variant `long name(params)' does not have the proper inferior type.
6259 if (cu
->language
== language_go
)
6261 /* This is a lie, but we already lie to the caller new_symbol_full.
6262 new_symbol_full assumes we return the mangled name.
6263 This just undoes that lie until things are cleaned up. */
6268 demangled
= cplus_demangle (mangled
,
6269 (DMGL_PARAMS
| DMGL_ANSI
6270 | (cu
->language
== language_java
6271 ? DMGL_JAVA
| DMGL_RET_POSTFIX
6276 make_cleanup (xfree
, demangled
);
6286 if (canon
== NULL
|| check_physname
)
6288 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
6290 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
6292 /* It may not mean a bug in GDB. The compiler could also
6293 compute DW_AT_linkage_name incorrectly. But in such case
6294 GDB would need to be bug-to-bug compatible. */
6296 complaint (&symfile_complaints
,
6297 _("Computed physname <%s> does not match demangled <%s> "
6298 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
6299 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
6301 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
6302 is available here - over computed PHYSNAME. It is safer
6303 against both buggy GDB and buggy compilers. */
6317 retval
= obsavestring (retval
, strlen (retval
),
6318 &objfile
->objfile_obstack
);
6320 do_cleanups (back_to
);
6324 /* Read the import statement specified by the given die and record it. */
6327 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
6329 struct objfile
*objfile
= cu
->objfile
;
6330 struct attribute
*import_attr
;
6331 struct die_info
*imported_die
, *child_die
;
6332 struct dwarf2_cu
*imported_cu
;
6333 const char *imported_name
;
6334 const char *imported_name_prefix
;
6335 const char *canonical_name
;
6336 const char *import_alias
;
6337 const char *imported_declaration
= NULL
;
6338 const char *import_prefix
;
6339 VEC (const_char_ptr
) *excludes
= NULL
;
6340 struct cleanup
*cleanups
;
6344 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
6345 if (import_attr
== NULL
)
6347 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
6348 dwarf_tag_name (die
->tag
));
6353 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
6354 imported_name
= dwarf2_name (imported_die
, imported_cu
);
6355 if (imported_name
== NULL
)
6357 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
6359 The import in the following code:
6373 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
6374 <52> DW_AT_decl_file : 1
6375 <53> DW_AT_decl_line : 6
6376 <54> DW_AT_import : <0x75>
6377 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
6379 <5b> DW_AT_decl_file : 1
6380 <5c> DW_AT_decl_line : 2
6381 <5d> DW_AT_type : <0x6e>
6383 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
6384 <76> DW_AT_byte_size : 4
6385 <77> DW_AT_encoding : 5 (signed)
6387 imports the wrong die ( 0x75 instead of 0x58 ).
6388 This case will be ignored until the gcc bug is fixed. */
6392 /* Figure out the local name after import. */
6393 import_alias
= dwarf2_name (die
, cu
);
6395 /* Figure out where the statement is being imported to. */
6396 import_prefix
= determine_prefix (die
, cu
);
6398 /* Figure out what the scope of the imported die is and prepend it
6399 to the name of the imported die. */
6400 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
6402 if (imported_die
->tag
!= DW_TAG_namespace
6403 && imported_die
->tag
!= DW_TAG_module
)
6405 imported_declaration
= imported_name
;
6406 canonical_name
= imported_name_prefix
;
6408 else if (strlen (imported_name_prefix
) > 0)
6410 temp
= alloca (strlen (imported_name_prefix
)
6411 + 2 + strlen (imported_name
) + 1);
6412 strcpy (temp
, imported_name_prefix
);
6413 strcat (temp
, "::");
6414 strcat (temp
, imported_name
);
6415 canonical_name
= temp
;
6418 canonical_name
= imported_name
;
6420 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
6422 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
6423 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
6424 child_die
= sibling_die (child_die
))
6426 /* DWARF-4: A Fortran use statement with a “rename list” may be
6427 represented by an imported module entry with an import attribute
6428 referring to the module and owned entries corresponding to those
6429 entities that are renamed as part of being imported. */
6431 if (child_die
->tag
!= DW_TAG_imported_declaration
)
6433 complaint (&symfile_complaints
,
6434 _("child DW_TAG_imported_declaration expected "
6435 "- DIE at 0x%x [in module %s]"),
6436 child_die
->offset
.sect_off
, objfile
->name
);
6440 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
6441 if (import_attr
== NULL
)
6443 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
6444 dwarf_tag_name (child_die
->tag
));
6449 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
6451 imported_name
= dwarf2_name (imported_die
, imported_cu
);
6452 if (imported_name
== NULL
)
6454 complaint (&symfile_complaints
,
6455 _("child DW_TAG_imported_declaration has unknown "
6456 "imported name - DIE at 0x%x [in module %s]"),
6457 child_die
->offset
.sect_off
, objfile
->name
);
6461 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
6463 process_die (child_die
, cu
);
6466 cp_add_using_directive (import_prefix
,
6469 imported_declaration
,
6471 &objfile
->objfile_obstack
);
6473 do_cleanups (cleanups
);
6476 /* Cleanup function for read_file_scope. */
6479 free_cu_line_header (void *arg
)
6481 struct dwarf2_cu
*cu
= arg
;
6483 free_line_header (cu
->line_header
);
6484 cu
->line_header
= NULL
;
6488 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
6489 char **name
, char **comp_dir
)
6491 struct attribute
*attr
;
6496 /* Find the filename. Do not use dwarf2_name here, since the filename
6497 is not a source language identifier. */
6498 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
6501 *name
= DW_STRING (attr
);
6504 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
6506 *comp_dir
= DW_STRING (attr
);
6507 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
6509 *comp_dir
= ldirname (*name
);
6510 if (*comp_dir
!= NULL
)
6511 make_cleanup (xfree
, *comp_dir
);
6513 if (*comp_dir
!= NULL
)
6515 /* Irix 6.2 native cc prepends <machine>.: to the compilation
6516 directory, get rid of it. */
6517 char *cp
= strchr (*comp_dir
, ':');
6519 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
6524 *name
= "<unknown>";
6527 /* Handle DW_AT_stmt_list for a compilation unit or type unit.
6528 DIE is the DW_TAG_compile_unit or DW_TAG_type_unit die for CU.
6529 COMP_DIR is the compilation directory.
6530 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
6533 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
6534 const char *comp_dir
, int want_line_info
)
6536 struct attribute
*attr
;
6538 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6541 unsigned int line_offset
= DW_UNSND (attr
);
6542 struct line_header
*line_header
6543 = dwarf_decode_line_header (line_offset
, cu
);
6547 cu
->line_header
= line_header
;
6548 make_cleanup (free_cu_line_header
, cu
);
6549 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, want_line_info
);
6554 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
6557 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6559 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6560 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6561 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
6562 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
6563 struct attribute
*attr
;
6565 char *comp_dir
= NULL
;
6566 struct die_info
*child_die
;
6567 bfd
*abfd
= objfile
->obfd
;
6570 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6572 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
6574 /* If we didn't find a lowpc, set it to highpc to avoid complaints
6575 from finish_block. */
6576 if (lowpc
== ((CORE_ADDR
) -1))
6581 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
6583 prepare_one_comp_unit (cu
, die
, cu
->language
);
6585 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
6586 standardised yet. As a workaround for the language detection we fall
6587 back to the DW_AT_producer string. */
6588 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
6589 cu
->language
= language_opencl
;
6591 /* Similar hack for Go. */
6592 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
6593 set_cu_language (DW_LANG_Go
, cu
);
6595 /* We assume that we're processing GCC output. */
6596 processing_gcc_compilation
= 2;
6598 processing_has_namespace_info
= 0;
6600 start_symtab (name
, comp_dir
, lowpc
);
6601 record_debugformat ("DWARF 2");
6602 record_producer (cu
->producer
);
6604 /* Decode line number information if present. We do this before
6605 processing child DIEs, so that the line header table is available
6606 for DW_AT_decl_file. */
6607 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 1);
6609 /* Process all dies in compilation unit. */
6610 if (die
->child
!= NULL
)
6612 child_die
= die
->child
;
6613 while (child_die
&& child_die
->tag
)
6615 process_die (child_die
, cu
);
6616 child_die
= sibling_die (child_die
);
6620 /* Decode macro information, if present. Dwarf 2 macro information
6621 refers to information in the line number info statement program
6622 header, so we can only read it if we've read the header
6624 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
6625 if (attr
&& cu
->line_header
)
6627 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
6628 complaint (&symfile_complaints
,
6629 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
6631 dwarf_decode_macros (cu
->line_header
, DW_UNSND (attr
),
6633 &dwarf2_per_objfile
->macro
, 1,
6638 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
6639 if (attr
&& cu
->line_header
)
6641 unsigned int macro_offset
= DW_UNSND (attr
);
6643 dwarf_decode_macros (cu
->line_header
, macro_offset
,
6645 &dwarf2_per_objfile
->macinfo
, 0,
6650 do_cleanups (back_to
);
6653 /* Process DW_TAG_type_unit.
6654 For TUs we want to skip the first top level sibling if it's not the
6655 actual type being defined by this TU. In this case the first top
6656 level sibling is there to provide context only. */
6659 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6661 struct objfile
*objfile
= cu
->objfile
;
6662 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6664 struct attribute
*attr
;
6666 char *comp_dir
= NULL
;
6667 struct die_info
*child_die
;
6668 bfd
*abfd
= objfile
->obfd
;
6670 /* start_symtab needs a low pc, but we don't really have one.
6671 Do what read_file_scope would do in the absence of such info. */
6672 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6674 /* Find the filename. Do not use dwarf2_name here, since the filename
6675 is not a source language identifier. */
6676 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
6678 name
= DW_STRING (attr
);
6680 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
6682 comp_dir
= DW_STRING (attr
);
6683 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
6685 comp_dir
= ldirname (name
);
6686 if (comp_dir
!= NULL
)
6687 make_cleanup (xfree
, comp_dir
);
6693 prepare_one_comp_unit (cu
, die
, language_minimal
);
6695 /* We assume that we're processing GCC output. */
6696 processing_gcc_compilation
= 2;
6698 processing_has_namespace_info
= 0;
6700 start_symtab (name
, comp_dir
, lowpc
);
6701 record_debugformat ("DWARF 2");
6702 record_producer (cu
->producer
);
6704 /* Decode line number information if present. We do this before
6705 processing child DIEs, so that the line header table is available
6706 for DW_AT_decl_file.
6707 We don't need the pc/line-number mapping for type units. */
6708 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 0);
6710 /* Process the dies in the type unit. */
6711 if (die
->child
== NULL
)
6713 dump_die_for_error (die
);
6714 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
6715 bfd_get_filename (abfd
));
6718 child_die
= die
->child
;
6720 while (child_die
&& child_die
->tag
)
6722 process_die (child_die
, cu
);
6724 child_die
= sibling_die (child_die
);
6727 do_cleanups (back_to
);
6733 hash_dwo_file (const void *item
)
6735 const struct dwo_file
*dwo_file
= item
;
6737 return htab_hash_string (dwo_file
->dwo_name
);
6741 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
6743 const struct dwo_file
*lhs
= item_lhs
;
6744 const struct dwo_file
*rhs
= item_rhs
;
6746 return strcmp (lhs
->dwo_name
, rhs
->dwo_name
) == 0;
6749 /* Allocate a hash table for DWO files. */
6752 allocate_dwo_file_hash_table (void)
6754 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6756 return htab_create_alloc_ex (41,
6760 &objfile
->objfile_obstack
,
6761 hashtab_obstack_allocate
,
6762 dummy_obstack_deallocate
);
6766 hash_dwo_unit (const void *item
)
6768 const struct dwo_unit
*dwo_unit
= item
;
6770 /* This drops the top 32 bits of the id, but is ok for a hash. */
6771 return dwo_unit
->signature
;
6775 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
6777 const struct dwo_unit
*lhs
= item_lhs
;
6778 const struct dwo_unit
*rhs
= item_rhs
;
6780 /* The signature is assumed to be unique within the DWO file.
6781 So while object file CU dwo_id's always have the value zero,
6782 that's OK, assuming each object file DWO file has only one CU,
6783 and that's the rule for now. */
6784 return lhs
->signature
== rhs
->signature
;
6787 /* Allocate a hash table for DWO CUs,TUs.
6788 There is one of these tables for each of CUs,TUs for each DWO file. */
6791 allocate_dwo_unit_table (struct objfile
*objfile
)
6793 /* Start out with a pretty small number.
6794 Generally DWO files contain only one CU and maybe some TUs. */
6795 return htab_create_alloc_ex (3,
6799 &objfile
->objfile_obstack
,
6800 hashtab_obstack_allocate
,
6801 dummy_obstack_deallocate
);
6804 /* This function is mapped across the sections and remembers the offset and
6805 size of each of the DWO debugging sections we are interested in. */
6808 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_file_ptr
)
6810 struct dwo_file
*dwo_file
= dwo_file_ptr
;
6811 const struct dwo_section_names
*names
= &dwo_section_names
;
6813 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
6815 dwo_file
->sections
.abbrev
.asection
= sectp
;
6816 dwo_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
6818 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
6820 dwo_file
->sections
.info
.asection
= sectp
;
6821 dwo_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
6823 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
6825 dwo_file
->sections
.line
.asection
= sectp
;
6826 dwo_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
6828 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
6830 dwo_file
->sections
.loc
.asection
= sectp
;
6831 dwo_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
6833 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
6835 dwo_file
->sections
.str
.asection
= sectp
;
6836 dwo_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
6838 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
6840 dwo_file
->sections
.str_offsets
.asection
= sectp
;
6841 dwo_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
6843 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
6845 struct dwarf2_section_info type_section
;
6847 memset (&type_section
, 0, sizeof (type_section
));
6848 type_section
.asection
= sectp
;
6849 type_section
.size
= bfd_get_section_size (sectp
);
6850 VEC_safe_push (dwarf2_section_info_def
, dwo_file
->sections
.types
,
6855 /* Structure used to pass data to create_debug_info_hash_table_reader. */
6857 struct create_dwo_info_table_data
6859 struct dwo_file
*dwo_file
;
6863 /* die_reader_func for create_debug_info_hash_table. */
6866 create_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
6868 struct die_info
*comp_unit_die
,
6872 struct dwarf2_cu
*cu
= reader
->cu
;
6873 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6874 sect_offset offset
= cu
->per_cu
->offset
;
6875 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
6876 struct create_dwo_info_table_data
*data
= datap
;
6877 struct dwo_file
*dwo_file
= data
->dwo_file
;
6878 htab_t cu_htab
= data
->cu_htab
;
6880 struct attribute
*attr
;
6881 struct dwo_unit
*dwo_unit
;
6883 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6886 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
6887 " its dwo_id [in module %s]"),
6888 offset
.sect_off
, dwo_file
->dwo_name
);
6892 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
6893 dwo_unit
->dwo_file
= dwo_file
;
6894 dwo_unit
->signature
= DW_UNSND (attr
);
6895 dwo_unit
->info_or_types_section
= section
;
6896 dwo_unit
->offset
= offset
;
6897 dwo_unit
->length
= cu
->per_cu
->length
;
6899 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
6900 gdb_assert (slot
!= NULL
);
6903 const struct dwo_unit
*dup_dwo_unit
= *slot
;
6905 complaint (&symfile_complaints
,
6906 _("debug entry at offset 0x%x is duplicate to the entry at"
6907 " offset 0x%x, dwo_id 0x%s [in module %s]"),
6908 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
6909 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
6910 dwo_file
->dwo_name
);
6915 if (dwarf2_die_debug
)
6916 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
6918 phex (dwo_unit
->signature
,
6919 sizeof (dwo_unit
->signature
)));
6922 /* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
6925 create_debug_info_hash_table (struct dwo_file
*dwo_file
)
6927 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6928 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
6931 gdb_byte
*info_ptr
, *end_ptr
;
6932 struct create_dwo_info_table_data create_dwo_info_table_data
;
6934 dwarf2_read_section (objfile
, section
);
6935 info_ptr
= section
->buffer
;
6937 if (info_ptr
== NULL
)
6940 /* We can't set abfd until now because the section may be empty or
6941 not present, in which case section->asection will be NULL. */
6942 abfd
= section
->asection
->owner
;
6944 if (dwarf2_die_debug
)
6945 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
6946 bfd_get_filename (abfd
));
6948 cu_htab
= allocate_dwo_unit_table (objfile
);
6950 create_dwo_info_table_data
.dwo_file
= dwo_file
;
6951 create_dwo_info_table_data
.cu_htab
= cu_htab
;
6953 end_ptr
= info_ptr
+ section
->size
;
6954 while (info_ptr
< end_ptr
)
6956 struct dwarf2_per_cu_data per_cu
;
6958 memset (&per_cu
, 0, sizeof (per_cu
));
6959 per_cu
.objfile
= objfile
;
6960 per_cu
.is_debug_types
= 0;
6961 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
6962 per_cu
.info_or_types_section
= section
;
6964 init_cutu_and_read_dies_no_follow (&per_cu
,
6965 &dwo_file
->sections
.abbrev
,
6967 create_debug_info_hash_table_reader
,
6968 &create_dwo_info_table_data
);
6970 info_ptr
+= per_cu
.length
;
6976 /* Subroutine of open_dwo_file to simplify it.
6977 Open the file specified by FILE_NAME and hand it off to BFD for
6978 preliminary analysis. Return a newly initialized bfd *, which
6979 includes a canonicalized copy of FILE_NAME.
6980 In case of trouble, return NULL.
6981 NOTE: This function is derived from symfile_bfd_open. */
6984 try_open_dwo_file (const char *file_name
)
6988 char *absolute_name
;
6990 desc
= openp (debug_file_directory
, OPF_TRY_CWD_FIRST
, file_name
,
6991 O_RDONLY
| O_BINARY
, &absolute_name
);
6995 sym_bfd
= bfd_fopen (absolute_name
, gnutarget
, FOPEN_RB
, desc
);
6998 xfree (absolute_name
);
7001 bfd_set_cacheable (sym_bfd
, 1);
7003 if (!bfd_check_format (sym_bfd
, bfd_object
))
7005 bfd_close (sym_bfd
); /* This also closes desc. */
7006 xfree (absolute_name
);
7010 /* bfd_usrdata exists for applications and libbfd must not touch it. */
7011 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
7016 /* Try to open DWO file DWO_NAME.
7017 COMP_DIR is the DW_AT_comp_dir attribute.
7018 The result is the bfd handle of the file.
7019 If there is a problem finding or opening the file, return NULL.
7020 Upon success, the canonicalized path of the file is stored in the bfd,
7021 same as symfile_bfd_open. */
7024 open_dwo_file (const char *dwo_name
, const char *comp_dir
)
7028 if (IS_ABSOLUTE_PATH (dwo_name
))
7029 return try_open_dwo_file (dwo_name
);
7031 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
7033 if (comp_dir
!= NULL
)
7035 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, dwo_name
, NULL
);
7037 /* NOTE: If comp_dir is a relative path, this will also try the
7038 search path, which seems useful. */
7039 abfd
= try_open_dwo_file (path_to_try
);
7040 xfree (path_to_try
);
7045 /* That didn't work, try debug-file-directory, which, despite its name,
7046 is a list of paths. */
7048 if (*debug_file_directory
== '\0')
7051 return try_open_dwo_file (dwo_name
);
7054 /* Initialize the use of the DWO file specified by DWO_NAME. */
7056 static struct dwo_file
*
7057 init_dwo_file (const char *dwo_name
, const char *comp_dir
)
7059 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7060 struct dwo_file
*dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7063 struct cleanup
*cleanups
;
7065 if (dwarf2_die_debug
)
7066 fprintf_unfiltered (gdb_stdlog
, "Reading DWO file %s:\n", dwo_name
);
7068 abfd
= open_dwo_file (dwo_name
, comp_dir
);
7071 dwo_file
->dwo_name
= dwo_name
;
7072 dwo_file
->dwo_bfd
= abfd
;
7074 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
7076 bfd_map_over_sections (abfd
, dwarf2_locate_dwo_sections
, dwo_file
);
7078 dwo_file
->cus
= create_debug_info_hash_table (dwo_file
);
7080 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
7081 dwo_file
->sections
.types
);
7083 discard_cleanups (cleanups
);
7088 /* Lookup DWO file DWO_NAME. */
7090 static struct dwo_file
*
7091 lookup_dwo_file (char *dwo_name
, const char *comp_dir
)
7093 struct dwo_file
*dwo_file
;
7094 struct dwo_file find_entry
;
7097 if (dwarf2_per_objfile
->dwo_files
== NULL
)
7098 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
7100 /* Have we already seen this DWO file? */
7101 find_entry
.dwo_name
= dwo_name
;
7102 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
7104 /* If not, read it in and build a table of the DWOs it contains. */
7106 *slot
= init_dwo_file (dwo_name
, comp_dir
);
7108 /* NOTE: This will be NULL if unable to open the file. */
7114 /* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
7115 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
7116 SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
7117 nomenclature as TUs).
7118 The result is the DWO CU or NULL if we didn't find it
7119 (dwo_id mismatch or couldn't find the DWO file). */
7121 static struct dwo_unit
*
7122 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7123 char *dwo_name
, const char *comp_dir
,
7126 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7127 struct dwo_file
*dwo_file
;
7129 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
7130 if (dwo_file
== NULL
)
7133 /* Look up the DWO using its signature(dwo_id). */
7135 if (dwo_file
->cus
!= NULL
)
7137 struct dwo_unit find_dwo_cu
, *dwo_cu
;
7139 find_dwo_cu
.signature
= signature
;
7140 dwo_cu
= htab_find (dwo_file
->cus
, &find_dwo_cu
);
7146 /* We didn't find it. This must mean a dwo_id mismatch. */
7148 complaint (&symfile_complaints
,
7149 _("Could not find DWO CU referenced by CU at offset 0x%x"
7151 this_cu
->offset
.sect_off
, objfile
->name
);
7155 /* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
7156 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
7157 The result is the DWO CU or NULL if we didn't find it
7158 (dwo_id mismatch or couldn't find the DWO file). */
7160 static struct dwo_unit
*
7161 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
7162 char *dwo_name
, const char *comp_dir
)
7164 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7165 struct dwo_file
*dwo_file
;
7167 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
7168 if (dwo_file
== NULL
)
7171 /* Look up the DWO using its signature(dwo_id). */
7173 if (dwo_file
->tus
!= NULL
)
7175 struct dwo_unit find_dwo_tu
, *dwo_tu
;
7177 find_dwo_tu
.signature
= this_tu
->signature
;
7178 dwo_tu
= htab_find (dwo_file
->tus
, &find_dwo_tu
);
7184 /* We didn't find it. This must mean a dwo_id mismatch. */
7186 complaint (&symfile_complaints
,
7187 _("Could not find DWO TU referenced by TU at offset 0x%x"
7189 this_tu
->per_cu
.offset
.sect_off
, objfile
->name
);
7193 /* Free all resources associated with DWO_FILE.
7194 Close the DWO file and munmap the sections.
7195 All memory should be on the objfile obstack. */
7198 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
7201 struct dwarf2_section_info
*section
;
7203 gdb_assert (dwo_file
->dwo_bfd
!= objfile
->obfd
);
7204 bfd_close (dwo_file
->dwo_bfd
);
7206 munmap_section_buffer (&dwo_file
->sections
.abbrev
);
7207 munmap_section_buffer (&dwo_file
->sections
.info
);
7208 munmap_section_buffer (&dwo_file
->sections
.line
);
7209 munmap_section_buffer (&dwo_file
->sections
.loc
);
7210 munmap_section_buffer (&dwo_file
->sections
.str
);
7211 munmap_section_buffer (&dwo_file
->sections
.str_offsets
);
7214 VEC_iterate (dwarf2_section_info_def
, dwo_file
->sections
.types
,
7217 munmap_section_buffer (section
);
7219 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
7222 /* Wrapper for free_dwo_file for use in cleanups. */
7225 free_dwo_file_cleanup (void *arg
)
7227 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
7228 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7230 free_dwo_file (dwo_file
, objfile
);
7233 /* Traversal function for free_dwo_files. */
7236 free_dwo_file_from_slot (void **slot
, void *info
)
7238 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7239 struct objfile
*objfile
= (struct objfile
*) info
;
7241 free_dwo_file (dwo_file
, objfile
);
7246 /* Free all resources associated with DWO_FILES. */
7249 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
7251 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
7254 /* Read in various DIEs. */
7256 /* qsort helper for inherit_abstract_dies. */
7259 unsigned_int_compar (const void *ap
, const void *bp
)
7261 unsigned int a
= *(unsigned int *) ap
;
7262 unsigned int b
= *(unsigned int *) bp
;
7264 return (a
> b
) - (b
> a
);
7267 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
7268 Inherit only the children of the DW_AT_abstract_origin DIE not being
7269 already referenced by DW_AT_abstract_origin from the children of the
7273 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
7275 struct die_info
*child_die
;
7276 unsigned die_children_count
;
7277 /* CU offsets which were referenced by children of the current DIE. */
7278 sect_offset
*offsets
;
7279 sect_offset
*offsets_end
, *offsetp
;
7280 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
7281 struct die_info
*origin_die
;
7282 /* Iterator of the ORIGIN_DIE children. */
7283 struct die_info
*origin_child_die
;
7284 struct cleanup
*cleanups
;
7285 struct attribute
*attr
;
7286 struct dwarf2_cu
*origin_cu
;
7287 struct pending
**origin_previous_list_in_scope
;
7289 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
7293 /* Note that following die references may follow to a die in a
7297 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
7299 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
7301 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
7302 origin_cu
->list_in_scope
= cu
->list_in_scope
;
7304 if (die
->tag
!= origin_die
->tag
7305 && !(die
->tag
== DW_TAG_inlined_subroutine
7306 && origin_die
->tag
== DW_TAG_subprogram
))
7307 complaint (&symfile_complaints
,
7308 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
7309 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
7311 child_die
= die
->child
;
7312 die_children_count
= 0;
7313 while (child_die
&& child_die
->tag
)
7315 child_die
= sibling_die (child_die
);
7316 die_children_count
++;
7318 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
7319 cleanups
= make_cleanup (xfree
, offsets
);
7321 offsets_end
= offsets
;
7322 child_die
= die
->child
;
7323 while (child_die
&& child_die
->tag
)
7325 /* For each CHILD_DIE, find the corresponding child of
7326 ORIGIN_DIE. If there is more than one layer of
7327 DW_AT_abstract_origin, follow them all; there shouldn't be,
7328 but GCC versions at least through 4.4 generate this (GCC PR
7330 struct die_info
*child_origin_die
= child_die
;
7331 struct dwarf2_cu
*child_origin_cu
= cu
;
7335 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
7339 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
7343 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
7344 counterpart may exist. */
7345 if (child_origin_die
!= child_die
)
7347 if (child_die
->tag
!= child_origin_die
->tag
7348 && !(child_die
->tag
== DW_TAG_inlined_subroutine
7349 && child_origin_die
->tag
== DW_TAG_subprogram
))
7350 complaint (&symfile_complaints
,
7351 _("Child DIE 0x%x and its abstract origin 0x%x have "
7352 "different tags"), child_die
->offset
.sect_off
,
7353 child_origin_die
->offset
.sect_off
);
7354 if (child_origin_die
->parent
!= origin_die
)
7355 complaint (&symfile_complaints
,
7356 _("Child DIE 0x%x and its abstract origin 0x%x have "
7357 "different parents"), child_die
->offset
.sect_off
,
7358 child_origin_die
->offset
.sect_off
);
7360 *offsets_end
++ = child_origin_die
->offset
;
7362 child_die
= sibling_die (child_die
);
7364 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
7365 unsigned_int_compar
);
7366 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
7367 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
7368 complaint (&symfile_complaints
,
7369 _("Multiple children of DIE 0x%x refer "
7370 "to DIE 0x%x as their abstract origin"),
7371 die
->offset
.sect_off
, offsetp
->sect_off
);
7374 origin_child_die
= origin_die
->child
;
7375 while (origin_child_die
&& origin_child_die
->tag
)
7377 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
7378 while (offsetp
< offsets_end
7379 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
7381 if (offsetp
>= offsets_end
7382 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
7384 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
7385 process_die (origin_child_die
, origin_cu
);
7387 origin_child_die
= sibling_die (origin_child_die
);
7389 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
7391 do_cleanups (cleanups
);
7395 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7397 struct objfile
*objfile
= cu
->objfile
;
7398 struct context_stack
*new;
7401 struct die_info
*child_die
;
7402 struct attribute
*attr
, *call_line
, *call_file
;
7405 struct block
*block
;
7406 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
7407 VEC (symbolp
) *template_args
= NULL
;
7408 struct template_symbol
*templ_func
= NULL
;
7412 /* If we do not have call site information, we can't show the
7413 caller of this inlined function. That's too confusing, so
7414 only use the scope for local variables. */
7415 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
7416 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
7417 if (call_line
== NULL
|| call_file
== NULL
)
7419 read_lexical_block_scope (die
, cu
);
7424 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7426 name
= dwarf2_name (die
, cu
);
7428 /* Ignore functions with missing or empty names. These are actually
7429 illegal according to the DWARF standard. */
7432 complaint (&symfile_complaints
,
7433 _("missing name for subprogram DIE at %d"),
7434 die
->offset
.sect_off
);
7438 /* Ignore functions with missing or invalid low and high pc attributes. */
7439 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
7441 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7442 if (!attr
|| !DW_UNSND (attr
))
7443 complaint (&symfile_complaints
,
7444 _("cannot get low and high bounds "
7445 "for subprogram DIE at %d"),
7446 die
->offset
.sect_off
);
7453 /* If we have any template arguments, then we must allocate a
7454 different sort of symbol. */
7455 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
7457 if (child_die
->tag
== DW_TAG_template_type_param
7458 || child_die
->tag
== DW_TAG_template_value_param
)
7460 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7461 struct template_symbol
);
7462 templ_func
->base
.is_cplus_template_function
= 1;
7467 new = push_context (0, lowpc
);
7468 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
7469 (struct symbol
*) templ_func
);
7471 /* If there is a location expression for DW_AT_frame_base, record
7473 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
7475 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
7476 expression is being recorded directly in the function's symbol
7477 and not in a separate frame-base object. I guess this hack is
7478 to avoid adding some sort of frame-base adjunct/annex to the
7479 function's symbol :-(. The problem with doing this is that it
7480 results in a function symbol with a location expression that
7481 has nothing to do with the location of the function, ouch! The
7482 relationship should be: a function's symbol has-a frame base; a
7483 frame-base has-a location expression. */
7484 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
7486 cu
->list_in_scope
= &local_symbols
;
7488 if (die
->child
!= NULL
)
7490 child_die
= die
->child
;
7491 while (child_die
&& child_die
->tag
)
7493 if (child_die
->tag
== DW_TAG_template_type_param
7494 || child_die
->tag
== DW_TAG_template_value_param
)
7496 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7499 VEC_safe_push (symbolp
, template_args
, arg
);
7502 process_die (child_die
, cu
);
7503 child_die
= sibling_die (child_die
);
7507 inherit_abstract_dies (die
, cu
);
7509 /* If we have a DW_AT_specification, we might need to import using
7510 directives from the context of the specification DIE. See the
7511 comment in determine_prefix. */
7512 if (cu
->language
== language_cplus
7513 && dwarf2_attr (die
, DW_AT_specification
, cu
))
7515 struct dwarf2_cu
*spec_cu
= cu
;
7516 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
7520 child_die
= spec_die
->child
;
7521 while (child_die
&& child_die
->tag
)
7523 if (child_die
->tag
== DW_TAG_imported_module
)
7524 process_die (child_die
, spec_cu
);
7525 child_die
= sibling_die (child_die
);
7528 /* In some cases, GCC generates specification DIEs that
7529 themselves contain DW_AT_specification attributes. */
7530 spec_die
= die_specification (spec_die
, &spec_cu
);
7534 new = pop_context ();
7535 /* Make a block for the local symbols within. */
7536 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
7537 lowpc
, highpc
, objfile
);
7539 /* For C++, set the block's scope. */
7540 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
7541 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
7542 determine_prefix (die
, cu
),
7543 processing_has_namespace_info
);
7545 /* If we have address ranges, record them. */
7546 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
7548 /* Attach template arguments to function. */
7549 if (! VEC_empty (symbolp
, template_args
))
7551 gdb_assert (templ_func
!= NULL
);
7553 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
7554 templ_func
->template_arguments
7555 = obstack_alloc (&objfile
->objfile_obstack
,
7556 (templ_func
->n_template_arguments
7557 * sizeof (struct symbol
*)));
7558 memcpy (templ_func
->template_arguments
,
7559 VEC_address (symbolp
, template_args
),
7560 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
7561 VEC_free (symbolp
, template_args
);
7564 /* In C++, we can have functions nested inside functions (e.g., when
7565 a function declares a class that has methods). This means that
7566 when we finish processing a function scope, we may need to go
7567 back to building a containing block's symbol lists. */
7568 local_symbols
= new->locals
;
7569 param_symbols
= new->params
;
7570 using_directives
= new->using_directives
;
7572 /* If we've finished processing a top-level function, subsequent
7573 symbols go in the file symbol list. */
7574 if (outermost_context_p ())
7575 cu
->list_in_scope
= &file_symbols
;
7578 /* Process all the DIES contained within a lexical block scope. Start
7579 a new scope, process the dies, and then close the scope. */
7582 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7584 struct objfile
*objfile
= cu
->objfile
;
7585 struct context_stack
*new;
7586 CORE_ADDR lowpc
, highpc
;
7587 struct die_info
*child_die
;
7590 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7592 /* Ignore blocks with missing or invalid low and high pc attributes. */
7593 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
7594 as multiple lexical blocks? Handling children in a sane way would
7595 be nasty. Might be easier to properly extend generic blocks to
7597 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
7602 push_context (0, lowpc
);
7603 if (die
->child
!= NULL
)
7605 child_die
= die
->child
;
7606 while (child_die
&& child_die
->tag
)
7608 process_die (child_die
, cu
);
7609 child_die
= sibling_die (child_die
);
7612 new = pop_context ();
7614 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
7617 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
7620 /* Note that recording ranges after traversing children, as we
7621 do here, means that recording a parent's ranges entails
7622 walking across all its children's ranges as they appear in
7623 the address map, which is quadratic behavior.
7625 It would be nicer to record the parent's ranges before
7626 traversing its children, simply overriding whatever you find
7627 there. But since we don't even decide whether to create a
7628 block until after we've traversed its children, that's hard
7630 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
7632 local_symbols
= new->locals
;
7633 using_directives
= new->using_directives
;
7636 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
7639 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7641 struct objfile
*objfile
= cu
->objfile
;
7642 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7643 CORE_ADDR pc
, baseaddr
;
7644 struct attribute
*attr
;
7645 struct call_site
*call_site
, call_site_local
;
7648 struct die_info
*child_die
;
7650 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7652 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7655 complaint (&symfile_complaints
,
7656 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
7657 "DIE 0x%x [in module %s]"),
7658 die
->offset
.sect_off
, objfile
->name
);
7661 pc
= DW_ADDR (attr
) + baseaddr
;
7663 if (cu
->call_site_htab
== NULL
)
7664 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
7665 NULL
, &objfile
->objfile_obstack
,
7666 hashtab_obstack_allocate
, NULL
);
7667 call_site_local
.pc
= pc
;
7668 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
7671 complaint (&symfile_complaints
,
7672 _("Duplicate PC %s for DW_TAG_GNU_call_site "
7673 "DIE 0x%x [in module %s]"),
7674 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
7678 /* Count parameters at the caller. */
7681 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7682 child_die
= sibling_die (child_die
))
7684 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
7686 complaint (&symfile_complaints
,
7687 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
7688 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7689 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
7696 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
7697 (sizeof (*call_site
)
7698 + (sizeof (*call_site
->parameter
)
7701 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
7704 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
7706 struct die_info
*func_die
;
7708 /* Skip also over DW_TAG_inlined_subroutine. */
7709 for (func_die
= die
->parent
;
7710 func_die
&& func_die
->tag
!= DW_TAG_subprogram
7711 && func_die
->tag
!= DW_TAG_subroutine_type
;
7712 func_die
= func_die
->parent
);
7714 /* DW_AT_GNU_all_call_sites is a superset
7715 of DW_AT_GNU_all_tail_call_sites. */
7717 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
7718 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
7720 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
7721 not complete. But keep CALL_SITE for look ups via call_site_htab,
7722 both the initial caller containing the real return address PC and
7723 the final callee containing the current PC of a chain of tail
7724 calls do not need to have the tail call list complete. But any
7725 function candidate for a virtual tail call frame searched via
7726 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
7727 determined unambiguously. */
7731 struct type
*func_type
= NULL
;
7734 func_type
= get_die_type (func_die
, cu
);
7735 if (func_type
!= NULL
)
7737 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
7739 /* Enlist this call site to the function. */
7740 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
7741 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
7744 complaint (&symfile_complaints
,
7745 _("Cannot find function owning DW_TAG_GNU_call_site "
7746 "DIE 0x%x [in module %s]"),
7747 die
->offset
.sect_off
, objfile
->name
);
7751 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
7753 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
7754 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
7755 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
7756 /* Keep NULL DWARF_BLOCK. */;
7757 else if (attr_form_is_block (attr
))
7759 struct dwarf2_locexpr_baton
*dlbaton
;
7761 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
7762 dlbaton
->data
= DW_BLOCK (attr
)->data
;
7763 dlbaton
->size
= DW_BLOCK (attr
)->size
;
7764 dlbaton
->per_cu
= cu
->per_cu
;
7766 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
7768 else if (is_ref_attr (attr
))
7770 struct dwarf2_cu
*target_cu
= cu
;
7771 struct die_info
*target_die
;
7773 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
7774 gdb_assert (target_cu
->objfile
== objfile
);
7775 if (die_is_declaration (target_die
, target_cu
))
7777 const char *target_physname
;
7779 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
7780 if (target_physname
== NULL
)
7781 complaint (&symfile_complaints
,
7782 _("DW_AT_GNU_call_site_target target DIE has invalid "
7783 "physname, for referencing DIE 0x%x [in module %s]"),
7784 die
->offset
.sect_off
, objfile
->name
);
7786 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
7792 /* DW_AT_entry_pc should be preferred. */
7793 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
7794 complaint (&symfile_complaints
,
7795 _("DW_AT_GNU_call_site_target target DIE has invalid "
7796 "low pc, for referencing DIE 0x%x [in module %s]"),
7797 die
->offset
.sect_off
, objfile
->name
);
7799 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
7803 complaint (&symfile_complaints
,
7804 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
7805 "block nor reference, for DIE 0x%x [in module %s]"),
7806 die
->offset
.sect_off
, objfile
->name
);
7808 call_site
->per_cu
= cu
->per_cu
;
7810 for (child_die
= die
->child
;
7811 child_die
&& child_die
->tag
;
7812 child_die
= sibling_die (child_die
))
7814 struct call_site_parameter
*parameter
;
7815 struct attribute
*loc
;
7817 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
7819 /* Already printed the complaint above. */
7823 gdb_assert (call_site
->parameter_count
< nparams
);
7824 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
7826 /* DW_AT_location specifies the register number. Value of the data
7827 assumed for the register is contained in DW_AT_GNU_call_site_value. */
7829 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
7830 if (loc
== NULL
|| !attr_form_is_block (loc
))
7832 complaint (&symfile_complaints
,
7833 _("No DW_FORM_block* DW_AT_location for "
7834 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7835 child_die
->offset
.sect_off
, objfile
->name
);
7840 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
7841 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
7842 if (parameter
->u
.dwarf_reg
!= -1)
7843 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
7844 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
7845 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
7846 ¶meter
->u
.fb_offset
))
7847 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
7850 complaint (&symfile_complaints
,
7851 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
7852 "for DW_FORM_block* DW_AT_location is supported for "
7853 "DW_TAG_GNU_call_site child DIE 0x%x "
7855 child_die
->offset
.sect_off
, objfile
->name
);
7860 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
7861 if (!attr_form_is_block (attr
))
7863 complaint (&symfile_complaints
,
7864 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
7865 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7866 child_die
->offset
.sect_off
, objfile
->name
);
7869 parameter
->value
= DW_BLOCK (attr
)->data
;
7870 parameter
->value_size
= DW_BLOCK (attr
)->size
;
7872 /* Parameters are not pre-cleared by memset above. */
7873 parameter
->data_value
= NULL
;
7874 parameter
->data_value_size
= 0;
7875 call_site
->parameter_count
++;
7877 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
7880 if (!attr_form_is_block (attr
))
7881 complaint (&symfile_complaints
,
7882 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
7883 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7884 child_die
->offset
.sect_off
, objfile
->name
);
7887 parameter
->data_value
= DW_BLOCK (attr
)->data
;
7888 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
7894 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
7895 Return 1 if the attributes are present and valid, otherwise, return 0.
7896 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
7899 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
7900 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
7901 struct partial_symtab
*ranges_pst
)
7903 struct objfile
*objfile
= cu
->objfile
;
7904 struct comp_unit_head
*cu_header
= &cu
->header
;
7905 bfd
*obfd
= objfile
->obfd
;
7906 unsigned int addr_size
= cu_header
->addr_size
;
7907 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
7908 /* Base address selection entry. */
7919 found_base
= cu
->base_known
;
7920 base
= cu
->base_address
;
7922 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
7923 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
7925 complaint (&symfile_complaints
,
7926 _("Offset %d out of bounds for DW_AT_ranges attribute"),
7930 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
7932 /* Read in the largest possible address. */
7933 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
7934 if ((marker
& mask
) == mask
)
7936 /* If we found the largest possible address, then
7937 read the base address. */
7938 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
7939 buffer
+= 2 * addr_size
;
7940 offset
+= 2 * addr_size
;
7946 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7950 CORE_ADDR range_beginning
, range_end
;
7952 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
7953 buffer
+= addr_size
;
7954 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
7955 buffer
+= addr_size
;
7956 offset
+= 2 * addr_size
;
7958 /* An end of list marker is a pair of zero addresses. */
7959 if (range_beginning
== 0 && range_end
== 0)
7960 /* Found the end of list entry. */
7963 /* Each base address selection entry is a pair of 2 values.
7964 The first is the largest possible address, the second is
7965 the base address. Check for a base address here. */
7966 if ((range_beginning
& mask
) == mask
)
7968 /* If we found the largest possible address, then
7969 read the base address. */
7970 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
7977 /* We have no valid base address for the ranges
7979 complaint (&symfile_complaints
,
7980 _("Invalid .debug_ranges data (no base address)"));
7984 if (range_beginning
> range_end
)
7986 /* Inverted range entries are invalid. */
7987 complaint (&symfile_complaints
,
7988 _("Invalid .debug_ranges data (inverted range)"));
7992 /* Empty range entries have no effect. */
7993 if (range_beginning
== range_end
)
7996 range_beginning
+= base
;
7999 if (ranges_pst
!= NULL
)
8000 addrmap_set_empty (objfile
->psymtabs_addrmap
,
8001 range_beginning
+ baseaddr
,
8002 range_end
- 1 + baseaddr
,
8005 /* FIXME: This is recording everything as a low-high
8006 segment of consecutive addresses. We should have a
8007 data structure for discontiguous block ranges
8011 low
= range_beginning
;
8017 if (range_beginning
< low
)
8018 low
= range_beginning
;
8019 if (range_end
> high
)
8025 /* If the first entry is an end-of-list marker, the range
8026 describes an empty scope, i.e. no instructions. */
8032 *high_return
= high
;
8036 /* Get low and high pc attributes from a die. Return 1 if the attributes
8037 are present and valid, otherwise, return 0. Return -1 if the range is
8038 discontinuous, i.e. derived from DW_AT_ranges information. */
8041 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
8042 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
8043 struct partial_symtab
*pst
)
8045 struct attribute
*attr
;
8046 struct attribute
*attr_high
;
8051 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
8054 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8057 low
= DW_ADDR (attr
);
8058 if (attr_high
->form
== DW_FORM_addr
8059 || attr_high
->form
== DW_FORM_GNU_addr_index
)
8060 high
= DW_ADDR (attr_high
);
8062 high
= low
+ DW_UNSND (attr_high
);
8065 /* Found high w/o low attribute. */
8068 /* Found consecutive range of addresses. */
8073 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
8076 /* Value of the DW_AT_ranges attribute is the offset in the
8077 .debug_ranges section. */
8078 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
8080 /* Found discontinuous range of addresses. */
8085 /* read_partial_die has also the strict LOW < HIGH requirement. */
8089 /* When using the GNU linker, .gnu.linkonce. sections are used to
8090 eliminate duplicate copies of functions and vtables and such.
8091 The linker will arbitrarily choose one and discard the others.
8092 The AT_*_pc values for such functions refer to local labels in
8093 these sections. If the section from that file was discarded, the
8094 labels are not in the output, so the relocs get a value of 0.
8095 If this is a discarded function, mark the pc bounds as invalid,
8096 so that GDB will ignore it. */
8097 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
8106 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
8107 its low and high PC addresses. Do nothing if these addresses could not
8108 be determined. Otherwise, set LOWPC to the low address if it is smaller,
8109 and HIGHPC to the high address if greater than HIGHPC. */
8112 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
8113 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8114 struct dwarf2_cu
*cu
)
8116 CORE_ADDR low
, high
;
8117 struct die_info
*child
= die
->child
;
8119 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
8121 *lowpc
= min (*lowpc
, low
);
8122 *highpc
= max (*highpc
, high
);
8125 /* If the language does not allow nested subprograms (either inside
8126 subprograms or lexical blocks), we're done. */
8127 if (cu
->language
!= language_ada
)
8130 /* Check all the children of the given DIE. If it contains nested
8131 subprograms, then check their pc bounds. Likewise, we need to
8132 check lexical blocks as well, as they may also contain subprogram
8134 while (child
&& child
->tag
)
8136 if (child
->tag
== DW_TAG_subprogram
8137 || child
->tag
== DW_TAG_lexical_block
)
8138 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
8139 child
= sibling_die (child
);
8143 /* Get the low and high pc's represented by the scope DIE, and store
8144 them in *LOWPC and *HIGHPC. If the correct values can't be
8145 determined, set *LOWPC to -1 and *HIGHPC to 0. */
8148 get_scope_pc_bounds (struct die_info
*die
,
8149 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8150 struct dwarf2_cu
*cu
)
8152 CORE_ADDR best_low
= (CORE_ADDR
) -1;
8153 CORE_ADDR best_high
= (CORE_ADDR
) 0;
8154 CORE_ADDR current_low
, current_high
;
8156 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
8158 best_low
= current_low
;
8159 best_high
= current_high
;
8163 struct die_info
*child
= die
->child
;
8165 while (child
&& child
->tag
)
8167 switch (child
->tag
) {
8168 case DW_TAG_subprogram
:
8169 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
8171 case DW_TAG_namespace
:
8173 /* FIXME: carlton/2004-01-16: Should we do this for
8174 DW_TAG_class_type/DW_TAG_structure_type, too? I think
8175 that current GCC's always emit the DIEs corresponding
8176 to definitions of methods of classes as children of a
8177 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
8178 the DIEs giving the declarations, which could be
8179 anywhere). But I don't see any reason why the
8180 standards says that they have to be there. */
8181 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
8183 if (current_low
!= ((CORE_ADDR
) -1))
8185 best_low
= min (best_low
, current_low
);
8186 best_high
= max (best_high
, current_high
);
8194 child
= sibling_die (child
);
8199 *highpc
= best_high
;
8202 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
8206 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
8207 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
8209 struct objfile
*objfile
= cu
->objfile
;
8210 struct attribute
*attr
;
8211 struct attribute
*attr_high
;
8213 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
8216 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8219 CORE_ADDR low
= DW_ADDR (attr
);
8221 if (attr_high
->form
== DW_FORM_addr
8222 || attr_high
->form
== DW_FORM_GNU_addr_index
)
8223 high
= DW_ADDR (attr_high
);
8225 high
= low
+ DW_UNSND (attr_high
);
8227 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
8231 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
8234 bfd
*obfd
= objfile
->obfd
;
8236 /* The value of the DW_AT_ranges attribute is the offset of the
8237 address range list in the .debug_ranges section. */
8238 unsigned long offset
= DW_UNSND (attr
);
8239 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
8241 /* For some target architectures, but not others, the
8242 read_address function sign-extends the addresses it returns.
8243 To recognize base address selection entries, we need a
8245 unsigned int addr_size
= cu
->header
.addr_size
;
8246 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
8248 /* The base address, to which the next pair is relative. Note
8249 that this 'base' is a DWARF concept: most entries in a range
8250 list are relative, to reduce the number of relocs against the
8251 debugging information. This is separate from this function's
8252 'baseaddr' argument, which GDB uses to relocate debugging
8253 information from a shared library based on the address at
8254 which the library was loaded. */
8255 CORE_ADDR base
= cu
->base_address
;
8256 int base_known
= cu
->base_known
;
8258 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
8259 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
8261 complaint (&symfile_complaints
,
8262 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
8269 unsigned int bytes_read
;
8270 CORE_ADDR start
, end
;
8272 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
8273 buffer
+= bytes_read
;
8274 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
8275 buffer
+= bytes_read
;
8277 /* Did we find the end of the range list? */
8278 if (start
== 0 && end
== 0)
8281 /* Did we find a base address selection entry? */
8282 else if ((start
& base_select_mask
) == base_select_mask
)
8288 /* We found an ordinary address range. */
8293 complaint (&symfile_complaints
,
8294 _("Invalid .debug_ranges data "
8295 "(no base address)"));
8301 /* Inverted range entries are invalid. */
8302 complaint (&symfile_complaints
,
8303 _("Invalid .debug_ranges data "
8304 "(inverted range)"));
8308 /* Empty range entries have no effect. */
8312 record_block_range (block
,
8313 baseaddr
+ base
+ start
,
8314 baseaddr
+ base
+ end
- 1);
8320 /* Check whether the producer field indicates either of GCC < 4.6, or the
8321 Intel C/C++ compiler, and cache the result in CU. */
8324 check_producer (struct dwarf2_cu
*cu
)
8327 int major
, minor
, release
;
8329 if (cu
->producer
== NULL
)
8331 /* For unknown compilers expect their behavior is DWARF version
8334 GCC started to support .debug_types sections by -gdwarf-4 since
8335 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
8336 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
8337 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
8338 interpreted incorrectly by GDB now - GCC PR debug/48229. */
8340 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
8342 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
8344 cs
= &cu
->producer
[strlen ("GNU ")];
8345 while (*cs
&& !isdigit (*cs
))
8347 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
8349 /* Not recognized as GCC. */
8352 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
8354 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
8355 cu
->producer_is_icc
= 1;
8358 /* For other non-GCC compilers, expect their behavior is DWARF version
8362 cu
->checked_producer
= 1;
8365 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
8366 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
8367 during 4.6.0 experimental. */
8370 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
8372 if (!cu
->checked_producer
)
8373 check_producer (cu
);
8375 return cu
->producer_is_gxx_lt_4_6
;
8378 /* Return the default accessibility type if it is not overriden by
8379 DW_AT_accessibility. */
8381 static enum dwarf_access_attribute
8382 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
8384 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
8386 /* The default DWARF 2 accessibility for members is public, the default
8387 accessibility for inheritance is private. */
8389 if (die
->tag
!= DW_TAG_inheritance
)
8390 return DW_ACCESS_public
;
8392 return DW_ACCESS_private
;
8396 /* DWARF 3+ defines the default accessibility a different way. The same
8397 rules apply now for DW_TAG_inheritance as for the members and it only
8398 depends on the container kind. */
8400 if (die
->parent
->tag
== DW_TAG_class_type
)
8401 return DW_ACCESS_private
;
8403 return DW_ACCESS_public
;
8407 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
8408 offset. If the attribute was not found return 0, otherwise return
8409 1. If it was found but could not properly be handled, set *OFFSET
8413 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
8416 struct attribute
*attr
;
8418 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
8423 /* Note that we do not check for a section offset first here.
8424 This is because DW_AT_data_member_location is new in DWARF 4,
8425 so if we see it, we can assume that a constant form is really
8426 a constant and not a section offset. */
8427 if (attr_form_is_constant (attr
))
8428 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
8429 else if (attr_form_is_section_offset (attr
))
8430 dwarf2_complex_location_expr_complaint ();
8431 else if (attr_form_is_block (attr
))
8432 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
8434 dwarf2_complex_location_expr_complaint ();
8442 /* Add an aggregate field to the field list. */
8445 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
8446 struct dwarf2_cu
*cu
)
8448 struct objfile
*objfile
= cu
->objfile
;
8449 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8450 struct nextfield
*new_field
;
8451 struct attribute
*attr
;
8453 char *fieldname
= "";
8455 /* Allocate a new field list entry and link it in. */
8456 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
8457 make_cleanup (xfree
, new_field
);
8458 memset (new_field
, 0, sizeof (struct nextfield
));
8460 if (die
->tag
== DW_TAG_inheritance
)
8462 new_field
->next
= fip
->baseclasses
;
8463 fip
->baseclasses
= new_field
;
8467 new_field
->next
= fip
->fields
;
8468 fip
->fields
= new_field
;
8472 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
8474 new_field
->accessibility
= DW_UNSND (attr
);
8476 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
8477 if (new_field
->accessibility
!= DW_ACCESS_public
)
8478 fip
->non_public_fields
= 1;
8480 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
8482 new_field
->virtuality
= DW_UNSND (attr
);
8484 new_field
->virtuality
= DW_VIRTUALITY_none
;
8486 fp
= &new_field
->field
;
8488 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
8492 /* Data member other than a C++ static data member. */
8494 /* Get type of field. */
8495 fp
->type
= die_type (die
, cu
);
8497 SET_FIELD_BITPOS (*fp
, 0);
8499 /* Get bit size of field (zero if none). */
8500 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
8503 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
8507 FIELD_BITSIZE (*fp
) = 0;
8510 /* Get bit offset of field. */
8511 if (handle_data_member_location (die
, cu
, &offset
))
8512 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
8513 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
8516 if (gdbarch_bits_big_endian (gdbarch
))
8518 /* For big endian bits, the DW_AT_bit_offset gives the
8519 additional bit offset from the MSB of the containing
8520 anonymous object to the MSB of the field. We don't
8521 have to do anything special since we don't need to
8522 know the size of the anonymous object. */
8523 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
8527 /* For little endian bits, compute the bit offset to the
8528 MSB of the anonymous object, subtract off the number of
8529 bits from the MSB of the field to the MSB of the
8530 object, and then subtract off the number of bits of
8531 the field itself. The result is the bit offset of
8532 the LSB of the field. */
8534 int bit_offset
= DW_UNSND (attr
);
8536 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8539 /* The size of the anonymous object containing
8540 the bit field is explicit, so use the
8541 indicated size (in bytes). */
8542 anonymous_size
= DW_UNSND (attr
);
8546 /* The size of the anonymous object containing
8547 the bit field must be inferred from the type
8548 attribute of the data member containing the
8550 anonymous_size
= TYPE_LENGTH (fp
->type
);
8552 SET_FIELD_BITPOS (*fp
,
8554 + anonymous_size
* bits_per_byte
8555 - bit_offset
- FIELD_BITSIZE (*fp
)));
8559 /* Get name of field. */
8560 fieldname
= dwarf2_name (die
, cu
);
8561 if (fieldname
== NULL
)
8564 /* The name is already allocated along with this objfile, so we don't
8565 need to duplicate it for the type. */
8566 fp
->name
= fieldname
;
8568 /* Change accessibility for artificial fields (e.g. virtual table
8569 pointer or virtual base class pointer) to private. */
8570 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
8572 FIELD_ARTIFICIAL (*fp
) = 1;
8573 new_field
->accessibility
= DW_ACCESS_private
;
8574 fip
->non_public_fields
= 1;
8577 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
8579 /* C++ static member. */
8581 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
8582 is a declaration, but all versions of G++ as of this writing
8583 (so through at least 3.2.1) incorrectly generate
8584 DW_TAG_variable tags. */
8586 const char *physname
;
8588 /* Get name of field. */
8589 fieldname
= dwarf2_name (die
, cu
);
8590 if (fieldname
== NULL
)
8593 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8595 /* Only create a symbol if this is an external value.
8596 new_symbol checks this and puts the value in the global symbol
8597 table, which we want. If it is not external, new_symbol
8598 will try to put the value in cu->list_in_scope which is wrong. */
8599 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
8601 /* A static const member, not much different than an enum as far as
8602 we're concerned, except that we can support more types. */
8603 new_symbol (die
, NULL
, cu
);
8606 /* Get physical name. */
8607 physname
= dwarf2_physname (fieldname
, die
, cu
);
8609 /* The name is already allocated along with this objfile, so we don't
8610 need to duplicate it for the type. */
8611 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
8612 FIELD_TYPE (*fp
) = die_type (die
, cu
);
8613 FIELD_NAME (*fp
) = fieldname
;
8615 else if (die
->tag
== DW_TAG_inheritance
)
8619 /* C++ base class field. */
8620 if (handle_data_member_location (die
, cu
, &offset
))
8621 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
8622 FIELD_BITSIZE (*fp
) = 0;
8623 FIELD_TYPE (*fp
) = die_type (die
, cu
);
8624 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
8625 fip
->nbaseclasses
++;
8629 /* Add a typedef defined in the scope of the FIP's class. */
8632 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
8633 struct dwarf2_cu
*cu
)
8635 struct objfile
*objfile
= cu
->objfile
;
8636 struct typedef_field_list
*new_field
;
8637 struct attribute
*attr
;
8638 struct typedef_field
*fp
;
8639 char *fieldname
= "";
8641 /* Allocate a new field list entry and link it in. */
8642 new_field
= xzalloc (sizeof (*new_field
));
8643 make_cleanup (xfree
, new_field
);
8645 gdb_assert (die
->tag
== DW_TAG_typedef
);
8647 fp
= &new_field
->field
;
8649 /* Get name of field. */
8650 fp
->name
= dwarf2_name (die
, cu
);
8651 if (fp
->name
== NULL
)
8654 fp
->type
= read_type_die (die
, cu
);
8656 new_field
->next
= fip
->typedef_field_list
;
8657 fip
->typedef_field_list
= new_field
;
8658 fip
->typedef_field_list_count
++;
8661 /* Create the vector of fields, and attach it to the type. */
8664 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
8665 struct dwarf2_cu
*cu
)
8667 int nfields
= fip
->nfields
;
8669 /* Record the field count, allocate space for the array of fields,
8670 and create blank accessibility bitfields if necessary. */
8671 TYPE_NFIELDS (type
) = nfields
;
8672 TYPE_FIELDS (type
) = (struct field
*)
8673 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
8674 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
8676 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
8678 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8680 TYPE_FIELD_PRIVATE_BITS (type
) =
8681 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8682 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
8684 TYPE_FIELD_PROTECTED_BITS (type
) =
8685 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8686 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
8688 TYPE_FIELD_IGNORE_BITS (type
) =
8689 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8690 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
8693 /* If the type has baseclasses, allocate and clear a bit vector for
8694 TYPE_FIELD_VIRTUAL_BITS. */
8695 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
8697 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
8698 unsigned char *pointer
;
8700 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8701 pointer
= TYPE_ALLOC (type
, num_bytes
);
8702 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
8703 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
8704 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
8707 /* Copy the saved-up fields into the field vector. Start from the head of
8708 the list, adding to the tail of the field array, so that they end up in
8709 the same order in the array in which they were added to the list. */
8710 while (nfields
-- > 0)
8712 struct nextfield
*fieldp
;
8716 fieldp
= fip
->fields
;
8717 fip
->fields
= fieldp
->next
;
8721 fieldp
= fip
->baseclasses
;
8722 fip
->baseclasses
= fieldp
->next
;
8725 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
8726 switch (fieldp
->accessibility
)
8728 case DW_ACCESS_private
:
8729 if (cu
->language
!= language_ada
)
8730 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
8733 case DW_ACCESS_protected
:
8734 if (cu
->language
!= language_ada
)
8735 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
8738 case DW_ACCESS_public
:
8742 /* Unknown accessibility. Complain and treat it as public. */
8744 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
8745 fieldp
->accessibility
);
8749 if (nfields
< fip
->nbaseclasses
)
8751 switch (fieldp
->virtuality
)
8753 case DW_VIRTUALITY_virtual
:
8754 case DW_VIRTUALITY_pure_virtual
:
8755 if (cu
->language
== language_ada
)
8756 error (_("unexpected virtuality in component of Ada type"));
8757 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
8764 /* Add a member function to the proper fieldlist. */
8767 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
8768 struct type
*type
, struct dwarf2_cu
*cu
)
8770 struct objfile
*objfile
= cu
->objfile
;
8771 struct attribute
*attr
;
8772 struct fnfieldlist
*flp
;
8774 struct fn_field
*fnp
;
8776 struct nextfnfield
*new_fnfield
;
8777 struct type
*this_type
;
8778 enum dwarf_access_attribute accessibility
;
8780 if (cu
->language
== language_ada
)
8781 error (_("unexpected member function in Ada type"));
8783 /* Get name of member function. */
8784 fieldname
= dwarf2_name (die
, cu
);
8785 if (fieldname
== NULL
)
8788 /* Look up member function name in fieldlist. */
8789 for (i
= 0; i
< fip
->nfnfields
; i
++)
8791 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
8795 /* Create new list element if necessary. */
8796 if (i
< fip
->nfnfields
)
8797 flp
= &fip
->fnfieldlists
[i
];
8800 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
8802 fip
->fnfieldlists
= (struct fnfieldlist
*)
8803 xrealloc (fip
->fnfieldlists
,
8804 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
8805 * sizeof (struct fnfieldlist
));
8806 if (fip
->nfnfields
== 0)
8807 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
8809 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
8810 flp
->name
= fieldname
;
8813 i
= fip
->nfnfields
++;
8816 /* Create a new member function field and chain it to the field list
8818 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
8819 make_cleanup (xfree
, new_fnfield
);
8820 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
8821 new_fnfield
->next
= flp
->head
;
8822 flp
->head
= new_fnfield
;
8825 /* Fill in the member function field info. */
8826 fnp
= &new_fnfield
->fnfield
;
8828 /* Delay processing of the physname until later. */
8829 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
8831 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
8836 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
8837 fnp
->physname
= physname
? physname
: "";
8840 fnp
->type
= alloc_type (objfile
);
8841 this_type
= read_type_die (die
, cu
);
8842 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
8844 int nparams
= TYPE_NFIELDS (this_type
);
8846 /* TYPE is the domain of this method, and THIS_TYPE is the type
8847 of the method itself (TYPE_CODE_METHOD). */
8848 smash_to_method_type (fnp
->type
, type
,
8849 TYPE_TARGET_TYPE (this_type
),
8850 TYPE_FIELDS (this_type
),
8851 TYPE_NFIELDS (this_type
),
8852 TYPE_VARARGS (this_type
));
8854 /* Handle static member functions.
8855 Dwarf2 has no clean way to discern C++ static and non-static
8856 member functions. G++ helps GDB by marking the first
8857 parameter for non-static member functions (which is the this
8858 pointer) as artificial. We obtain this information from
8859 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
8860 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
8861 fnp
->voffset
= VOFFSET_STATIC
;
8864 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
8865 dwarf2_full_name (fieldname
, die
, cu
));
8867 /* Get fcontext from DW_AT_containing_type if present. */
8868 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
8869 fnp
->fcontext
= die_containing_type (die
, cu
);
8871 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
8872 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
8874 /* Get accessibility. */
8875 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
8877 accessibility
= DW_UNSND (attr
);
8879 accessibility
= dwarf2_default_access_attribute (die
, cu
);
8880 switch (accessibility
)
8882 case DW_ACCESS_private
:
8883 fnp
->is_private
= 1;
8885 case DW_ACCESS_protected
:
8886 fnp
->is_protected
= 1;
8890 /* Check for artificial methods. */
8891 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
8892 if (attr
&& DW_UNSND (attr
) != 0)
8893 fnp
->is_artificial
= 1;
8895 /* Get index in virtual function table if it is a virtual member
8896 function. For older versions of GCC, this is an offset in the
8897 appropriate virtual table, as specified by DW_AT_containing_type.
8898 For everyone else, it is an expression to be evaluated relative
8899 to the object address. */
8901 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
8904 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
8906 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
8908 /* Old-style GCC. */
8909 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
8911 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
8912 || (DW_BLOCK (attr
)->size
> 1
8913 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
8914 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
8916 struct dwarf_block blk
;
8919 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
8921 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
8922 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
8923 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
8924 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
8925 dwarf2_complex_location_expr_complaint ();
8927 fnp
->voffset
/= cu
->header
.addr_size
;
8931 dwarf2_complex_location_expr_complaint ();
8934 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
8936 else if (attr_form_is_section_offset (attr
))
8938 dwarf2_complex_location_expr_complaint ();
8942 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
8948 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
8949 if (attr
&& DW_UNSND (attr
))
8951 /* GCC does this, as of 2008-08-25; PR debug/37237. */
8952 complaint (&symfile_complaints
,
8953 _("Member function \"%s\" (offset %d) is virtual "
8954 "but the vtable offset is not specified"),
8955 fieldname
, die
->offset
.sect_off
);
8956 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8957 TYPE_CPLUS_DYNAMIC (type
) = 1;
8962 /* Create the vector of member function fields, and attach it to the type. */
8965 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
8966 struct dwarf2_cu
*cu
)
8968 struct fnfieldlist
*flp
;
8971 if (cu
->language
== language_ada
)
8972 error (_("unexpected member functions in Ada type"));
8974 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8975 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
8976 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
8978 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
8980 struct nextfnfield
*nfp
= flp
->head
;
8981 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
8984 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
8985 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
8986 fn_flp
->fn_fields
= (struct fn_field
*)
8987 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
8988 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
8989 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
8992 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
8995 /* Returns non-zero if NAME is the name of a vtable member in CU's
8996 language, zero otherwise. */
8998 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
9000 static const char vptr
[] = "_vptr";
9001 static const char vtable
[] = "vtable";
9003 /* Look for the C++ and Java forms of the vtable. */
9004 if ((cu
->language
== language_java
9005 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
9006 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
9007 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
9013 /* GCC outputs unnamed structures that are really pointers to member
9014 functions, with the ABI-specified layout. If TYPE describes
9015 such a structure, smash it into a member function type.
9017 GCC shouldn't do this; it should just output pointer to member DIEs.
9018 This is GCC PR debug/28767. */
9021 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
9023 struct type
*pfn_type
, *domain_type
, *new_type
;
9025 /* Check for a structure with no name and two children. */
9026 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
9029 /* Check for __pfn and __delta members. */
9030 if (TYPE_FIELD_NAME (type
, 0) == NULL
9031 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
9032 || TYPE_FIELD_NAME (type
, 1) == NULL
9033 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
9036 /* Find the type of the method. */
9037 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
9038 if (pfn_type
== NULL
9039 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
9040 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
9043 /* Look for the "this" argument. */
9044 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
9045 if (TYPE_NFIELDS (pfn_type
) == 0
9046 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
9047 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
9050 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
9051 new_type
= alloc_type (objfile
);
9052 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
9053 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
9054 TYPE_VARARGS (pfn_type
));
9055 smash_to_methodptr_type (type
, new_type
);
9058 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
9062 producer_is_icc (struct dwarf2_cu
*cu
)
9064 if (!cu
->checked_producer
)
9065 check_producer (cu
);
9067 return cu
->producer_is_icc
;
9070 /* Called when we find the DIE that starts a structure or union scope
9071 (definition) to create a type for the structure or union. Fill in
9072 the type's name and general properties; the members will not be
9073 processed until process_structure_type.
9075 NOTE: we need to call these functions regardless of whether or not the
9076 DIE has a DW_AT_name attribute, since it might be an anonymous
9077 structure or union. This gets the type entered into our set of
9080 However, if the structure is incomplete (an opaque struct/union)
9081 then suppress creating a symbol table entry for it since gdb only
9082 wants to find the one with the complete definition. Note that if
9083 it is complete, we just call new_symbol, which does it's own
9084 checking about whether the struct/union is anonymous or not (and
9085 suppresses creating a symbol table entry itself). */
9087 static struct type
*
9088 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9090 struct objfile
*objfile
= cu
->objfile
;
9092 struct attribute
*attr
;
9095 /* If the definition of this type lives in .debug_types, read that type.
9096 Don't follow DW_AT_specification though, that will take us back up
9097 the chain and we want to go down. */
9098 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
9101 struct dwarf2_cu
*type_cu
= cu
;
9102 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
9104 /* We could just recurse on read_structure_type, but we need to call
9105 get_die_type to ensure only one type for this DIE is created.
9106 This is important, for example, because for c++ classes we need
9107 TYPE_NAME set which is only done by new_symbol. Blech. */
9108 type
= read_type_die (type_die
, type_cu
);
9110 /* TYPE_CU may not be the same as CU.
9111 Ensure TYPE is recorded in CU's type_hash table. */
9112 return set_die_type (die
, type
, cu
);
9115 type
= alloc_type (objfile
);
9116 INIT_CPLUS_SPECIFIC (type
);
9118 name
= dwarf2_name (die
, cu
);
9121 if (cu
->language
== language_cplus
9122 || cu
->language
== language_java
)
9124 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
9126 /* dwarf2_full_name might have already finished building the DIE's
9127 type. If so, there is no need to continue. */
9128 if (get_die_type (die
, cu
) != NULL
)
9129 return get_die_type (die
, cu
);
9131 TYPE_TAG_NAME (type
) = full_name
;
9132 if (die
->tag
== DW_TAG_structure_type
9133 || die
->tag
== DW_TAG_class_type
)
9134 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
9138 /* The name is already allocated along with this objfile, so
9139 we don't need to duplicate it for the type. */
9140 TYPE_TAG_NAME (type
) = (char *) name
;
9141 if (die
->tag
== DW_TAG_class_type
)
9142 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
9146 if (die
->tag
== DW_TAG_structure_type
)
9148 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9150 else if (die
->tag
== DW_TAG_union_type
)
9152 TYPE_CODE (type
) = TYPE_CODE_UNION
;
9156 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
9159 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
9160 TYPE_DECLARED_CLASS (type
) = 1;
9162 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9165 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9169 TYPE_LENGTH (type
) = 0;
9172 if (producer_is_icc (cu
))
9174 /* ICC does not output the required DW_AT_declaration
9175 on incomplete types, but gives them a size of zero. */
9178 TYPE_STUB_SUPPORTED (type
) = 1;
9180 if (die_is_declaration (die
, cu
))
9181 TYPE_STUB (type
) = 1;
9182 else if (attr
== NULL
&& die
->child
== NULL
9183 && producer_is_realview (cu
->producer
))
9184 /* RealView does not output the required DW_AT_declaration
9185 on incomplete types. */
9186 TYPE_STUB (type
) = 1;
9188 /* We need to add the type field to the die immediately so we don't
9189 infinitely recurse when dealing with pointers to the structure
9190 type within the structure itself. */
9191 set_die_type (die
, type
, cu
);
9193 /* set_die_type should be already done. */
9194 set_descriptive_type (type
, die
, cu
);
9199 /* Finish creating a structure or union type, including filling in
9200 its members and creating a symbol for it. */
9203 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9205 struct objfile
*objfile
= cu
->objfile
;
9206 struct die_info
*child_die
= die
->child
;
9209 type
= get_die_type (die
, cu
);
9211 type
= read_structure_type (die
, cu
);
9213 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
9215 struct field_info fi
;
9216 struct die_info
*child_die
;
9217 VEC (symbolp
) *template_args
= NULL
;
9218 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9220 memset (&fi
, 0, sizeof (struct field_info
));
9222 child_die
= die
->child
;
9224 while (child_die
&& child_die
->tag
)
9226 if (child_die
->tag
== DW_TAG_member
9227 || child_die
->tag
== DW_TAG_variable
)
9229 /* NOTE: carlton/2002-11-05: A C++ static data member
9230 should be a DW_TAG_member that is a declaration, but
9231 all versions of G++ as of this writing (so through at
9232 least 3.2.1) incorrectly generate DW_TAG_variable
9233 tags for them instead. */
9234 dwarf2_add_field (&fi
, child_die
, cu
);
9236 else if (child_die
->tag
== DW_TAG_subprogram
)
9238 /* C++ member function. */
9239 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
9241 else if (child_die
->tag
== DW_TAG_inheritance
)
9243 /* C++ base class field. */
9244 dwarf2_add_field (&fi
, child_die
, cu
);
9246 else if (child_die
->tag
== DW_TAG_typedef
)
9247 dwarf2_add_typedef (&fi
, child_die
, cu
);
9248 else if (child_die
->tag
== DW_TAG_template_type_param
9249 || child_die
->tag
== DW_TAG_template_value_param
)
9251 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9254 VEC_safe_push (symbolp
, template_args
, arg
);
9257 child_die
= sibling_die (child_die
);
9260 /* Attach template arguments to type. */
9261 if (! VEC_empty (symbolp
, template_args
))
9263 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9264 TYPE_N_TEMPLATE_ARGUMENTS (type
)
9265 = VEC_length (symbolp
, template_args
);
9266 TYPE_TEMPLATE_ARGUMENTS (type
)
9267 = obstack_alloc (&objfile
->objfile_obstack
,
9268 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
9269 * sizeof (struct symbol
*)));
9270 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
9271 VEC_address (symbolp
, template_args
),
9272 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
9273 * sizeof (struct symbol
*)));
9274 VEC_free (symbolp
, template_args
);
9277 /* Attach fields and member functions to the type. */
9279 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
9282 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
9284 /* Get the type which refers to the base class (possibly this
9285 class itself) which contains the vtable pointer for the current
9286 class from the DW_AT_containing_type attribute. This use of
9287 DW_AT_containing_type is a GNU extension. */
9289 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
9291 struct type
*t
= die_containing_type (die
, cu
);
9293 TYPE_VPTR_BASETYPE (type
) = t
;
9298 /* Our own class provides vtbl ptr. */
9299 for (i
= TYPE_NFIELDS (t
) - 1;
9300 i
>= TYPE_N_BASECLASSES (t
);
9303 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
9305 if (is_vtable_name (fieldname
, cu
))
9307 TYPE_VPTR_FIELDNO (type
) = i
;
9312 /* Complain if virtual function table field not found. */
9313 if (i
< TYPE_N_BASECLASSES (t
))
9314 complaint (&symfile_complaints
,
9315 _("virtual function table pointer "
9316 "not found when defining class '%s'"),
9317 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
9322 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
9325 else if (cu
->producer
9326 && strncmp (cu
->producer
,
9327 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
9329 /* The IBM XLC compiler does not provide direct indication
9330 of the containing type, but the vtable pointer is
9331 always named __vfp. */
9335 for (i
= TYPE_NFIELDS (type
) - 1;
9336 i
>= TYPE_N_BASECLASSES (type
);
9339 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
9341 TYPE_VPTR_FIELDNO (type
) = i
;
9342 TYPE_VPTR_BASETYPE (type
) = type
;
9349 /* Copy fi.typedef_field_list linked list elements content into the
9350 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
9351 if (fi
.typedef_field_list
)
9353 int i
= fi
.typedef_field_list_count
;
9355 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9356 TYPE_TYPEDEF_FIELD_ARRAY (type
)
9357 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
9358 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
9360 /* Reverse the list order to keep the debug info elements order. */
9363 struct typedef_field
*dest
, *src
;
9365 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
9366 src
= &fi
.typedef_field_list
->field
;
9367 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
9372 do_cleanups (back_to
);
9374 if (HAVE_CPLUS_STRUCT (type
))
9375 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
9378 quirk_gcc_member_function_pointer (type
, objfile
);
9380 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
9381 snapshots) has been known to create a die giving a declaration
9382 for a class that has, as a child, a die giving a definition for a
9383 nested class. So we have to process our children even if the
9384 current die is a declaration. Normally, of course, a declaration
9385 won't have any children at all. */
9387 while (child_die
!= NULL
&& child_die
->tag
)
9389 if (child_die
->tag
== DW_TAG_member
9390 || child_die
->tag
== DW_TAG_variable
9391 || child_die
->tag
== DW_TAG_inheritance
9392 || child_die
->tag
== DW_TAG_template_value_param
9393 || child_die
->tag
== DW_TAG_template_type_param
)
9398 process_die (child_die
, cu
);
9400 child_die
= sibling_die (child_die
);
9403 /* Do not consider external references. According to the DWARF standard,
9404 these DIEs are identified by the fact that they have no byte_size
9405 attribute, and a declaration attribute. */
9406 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
9407 || !die_is_declaration (die
, cu
))
9408 new_symbol (die
, type
, cu
);
9411 /* Given a DW_AT_enumeration_type die, set its type. We do not
9412 complete the type's fields yet, or create any symbols. */
9414 static struct type
*
9415 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9417 struct objfile
*objfile
= cu
->objfile
;
9419 struct attribute
*attr
;
9422 /* If the definition of this type lives in .debug_types, read that type.
9423 Don't follow DW_AT_specification though, that will take us back up
9424 the chain and we want to go down. */
9425 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
9428 struct dwarf2_cu
*type_cu
= cu
;
9429 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
9431 type
= read_type_die (type_die
, type_cu
);
9433 /* TYPE_CU may not be the same as CU.
9434 Ensure TYPE is recorded in CU's type_hash table. */
9435 return set_die_type (die
, type
, cu
);
9438 type
= alloc_type (objfile
);
9440 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
9441 name
= dwarf2_full_name (NULL
, die
, cu
);
9443 TYPE_TAG_NAME (type
) = (char *) name
;
9445 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9448 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9452 TYPE_LENGTH (type
) = 0;
9455 /* The enumeration DIE can be incomplete. In Ada, any type can be
9456 declared as private in the package spec, and then defined only
9457 inside the package body. Such types are known as Taft Amendment
9458 Types. When another package uses such a type, an incomplete DIE
9459 may be generated by the compiler. */
9460 if (die_is_declaration (die
, cu
))
9461 TYPE_STUB (type
) = 1;
9463 return set_die_type (die
, type
, cu
);
9466 /* Given a pointer to a die which begins an enumeration, process all
9467 the dies that define the members of the enumeration, and create the
9468 symbol for the enumeration type.
9470 NOTE: We reverse the order of the element list. */
9473 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9475 struct type
*this_type
;
9477 this_type
= get_die_type (die
, cu
);
9478 if (this_type
== NULL
)
9479 this_type
= read_enumeration_type (die
, cu
);
9481 if (die
->child
!= NULL
)
9483 struct die_info
*child_die
;
9485 struct field
*fields
= NULL
;
9487 int unsigned_enum
= 1;
9492 child_die
= die
->child
;
9493 while (child_die
&& child_die
->tag
)
9495 if (child_die
->tag
!= DW_TAG_enumerator
)
9497 process_die (child_die
, cu
);
9501 name
= dwarf2_name (child_die
, cu
);
9504 sym
= new_symbol (child_die
, this_type
, cu
);
9505 if (SYMBOL_VALUE (sym
) < 0)
9510 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
9513 mask
|= SYMBOL_VALUE (sym
);
9515 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
9517 fields
= (struct field
*)
9519 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
9520 * sizeof (struct field
));
9523 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
9524 FIELD_TYPE (fields
[num_fields
]) = NULL
;
9525 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
9526 FIELD_BITSIZE (fields
[num_fields
]) = 0;
9532 child_die
= sibling_die (child_die
);
9537 TYPE_NFIELDS (this_type
) = num_fields
;
9538 TYPE_FIELDS (this_type
) = (struct field
*)
9539 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
9540 memcpy (TYPE_FIELDS (this_type
), fields
,
9541 sizeof (struct field
) * num_fields
);
9545 TYPE_UNSIGNED (this_type
) = 1;
9547 TYPE_FLAG_ENUM (this_type
) = 1;
9550 /* If we are reading an enum from a .debug_types unit, and the enum
9551 is a declaration, and the enum is not the signatured type in the
9552 unit, then we do not want to add a symbol for it. Adding a
9553 symbol would in some cases obscure the true definition of the
9554 enum, giving users an incomplete type when the definition is
9555 actually available. Note that we do not want to do this for all
9556 enums which are just declarations, because C++0x allows forward
9557 enum declarations. */
9558 if (cu
->per_cu
->is_debug_types
9559 && die_is_declaration (die
, cu
))
9561 struct signatured_type
*sig_type
;
9564 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
9565 cu
->per_cu
->info_or_types_section
,
9566 cu
->per_cu
->offset
);
9567 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
9568 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
9572 new_symbol (die
, this_type
, cu
);
9575 /* Extract all information from a DW_TAG_array_type DIE and put it in
9576 the DIE's type field. For now, this only handles one dimensional
9579 static struct type
*
9580 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9582 struct objfile
*objfile
= cu
->objfile
;
9583 struct die_info
*child_die
;
9585 struct type
*element_type
, *range_type
, *index_type
;
9586 struct type
**range_types
= NULL
;
9587 struct attribute
*attr
;
9589 struct cleanup
*back_to
;
9592 element_type
= die_type (die
, cu
);
9594 /* The die_type call above may have already set the type for this DIE. */
9595 type
= get_die_type (die
, cu
);
9599 /* Irix 6.2 native cc creates array types without children for
9600 arrays with unspecified length. */
9601 if (die
->child
== NULL
)
9603 index_type
= objfile_type (objfile
)->builtin_int
;
9604 range_type
= create_range_type (NULL
, index_type
, 0, -1);
9605 type
= create_array_type (NULL
, element_type
, range_type
);
9606 return set_die_type (die
, type
, cu
);
9609 back_to
= make_cleanup (null_cleanup
, NULL
);
9610 child_die
= die
->child
;
9611 while (child_die
&& child_die
->tag
)
9613 if (child_die
->tag
== DW_TAG_subrange_type
)
9615 struct type
*child_type
= read_type_die (child_die
, cu
);
9617 if (child_type
!= NULL
)
9619 /* The range type was succesfully read. Save it for the
9620 array type creation. */
9621 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
9623 range_types
= (struct type
**)
9624 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
9625 * sizeof (struct type
*));
9627 make_cleanup (free_current_contents
, &range_types
);
9629 range_types
[ndim
++] = child_type
;
9632 child_die
= sibling_die (child_die
);
9635 /* Dwarf2 dimensions are output from left to right, create the
9636 necessary array types in backwards order. */
9638 type
= element_type
;
9640 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
9645 type
= create_array_type (NULL
, type
, range_types
[i
++]);
9650 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
9653 /* Understand Dwarf2 support for vector types (like they occur on
9654 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
9655 array type. This is not part of the Dwarf2/3 standard yet, but a
9656 custom vendor extension. The main difference between a regular
9657 array and the vector variant is that vectors are passed by value
9659 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
9661 make_vector_type (type
);
9663 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
9664 implementation may choose to implement triple vectors using this
9666 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9669 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
9670 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9672 complaint (&symfile_complaints
,
9673 _("DW_AT_byte_size for array type smaller "
9674 "than the total size of elements"));
9677 name
= dwarf2_name (die
, cu
);
9679 TYPE_NAME (type
) = name
;
9681 /* Install the type in the die. */
9682 set_die_type (die
, type
, cu
);
9684 /* set_die_type should be already done. */
9685 set_descriptive_type (type
, die
, cu
);
9687 do_cleanups (back_to
);
9692 static enum dwarf_array_dim_ordering
9693 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
9695 struct attribute
*attr
;
9697 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
9699 if (attr
) return DW_SND (attr
);
9701 /* GNU F77 is a special case, as at 08/2004 array type info is the
9702 opposite order to the dwarf2 specification, but data is still
9703 laid out as per normal fortran.
9705 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
9706 version checking. */
9708 if (cu
->language
== language_fortran
9709 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
9711 return DW_ORD_row_major
;
9714 switch (cu
->language_defn
->la_array_ordering
)
9716 case array_column_major
:
9717 return DW_ORD_col_major
;
9718 case array_row_major
:
9720 return DW_ORD_row_major
;
9724 /* Extract all information from a DW_TAG_set_type DIE and put it in
9725 the DIE's type field. */
9727 static struct type
*
9728 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9730 struct type
*domain_type
, *set_type
;
9731 struct attribute
*attr
;
9733 domain_type
= die_type (die
, cu
);
9735 /* The die_type call above may have already set the type for this DIE. */
9736 set_type
= get_die_type (die
, cu
);
9740 set_type
= create_set_type (NULL
, domain_type
);
9742 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9744 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
9746 return set_die_type (die
, set_type
, cu
);
9749 /* First cut: install each common block member as a global variable. */
9752 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
9754 struct die_info
*child_die
;
9755 struct attribute
*attr
;
9757 CORE_ADDR base
= (CORE_ADDR
) 0;
9759 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
9762 /* Support the .debug_loc offsets. */
9763 if (attr_form_is_block (attr
))
9765 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
9767 else if (attr_form_is_section_offset (attr
))
9769 dwarf2_complex_location_expr_complaint ();
9773 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9774 "common block member");
9777 if (die
->child
!= NULL
)
9779 child_die
= die
->child
;
9780 while (child_die
&& child_die
->tag
)
9784 sym
= new_symbol (child_die
, NULL
, cu
);
9786 && handle_data_member_location (child_die
, cu
, &offset
))
9788 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
9789 add_symbol_to_list (sym
, &global_symbols
);
9791 child_die
= sibling_die (child_die
);
9796 /* Create a type for a C++ namespace. */
9798 static struct type
*
9799 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9801 struct objfile
*objfile
= cu
->objfile
;
9802 const char *previous_prefix
, *name
;
9806 /* For extensions, reuse the type of the original namespace. */
9807 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
9809 struct die_info
*ext_die
;
9810 struct dwarf2_cu
*ext_cu
= cu
;
9812 ext_die
= dwarf2_extension (die
, &ext_cu
);
9813 type
= read_type_die (ext_die
, ext_cu
);
9815 /* EXT_CU may not be the same as CU.
9816 Ensure TYPE is recorded in CU's type_hash table. */
9817 return set_die_type (die
, type
, cu
);
9820 name
= namespace_name (die
, &is_anonymous
, cu
);
9822 /* Now build the name of the current namespace. */
9824 previous_prefix
= determine_prefix (die
, cu
);
9825 if (previous_prefix
[0] != '\0')
9826 name
= typename_concat (&objfile
->objfile_obstack
,
9827 previous_prefix
, name
, 0, cu
);
9829 /* Create the type. */
9830 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
9832 TYPE_NAME (type
) = (char *) name
;
9833 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9835 return set_die_type (die
, type
, cu
);
9838 /* Read a C++ namespace. */
9841 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9843 struct objfile
*objfile
= cu
->objfile
;
9846 /* Add a symbol associated to this if we haven't seen the namespace
9847 before. Also, add a using directive if it's an anonymous
9850 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
9854 type
= read_type_die (die
, cu
);
9855 new_symbol (die
, type
, cu
);
9857 namespace_name (die
, &is_anonymous
, cu
);
9860 const char *previous_prefix
= determine_prefix (die
, cu
);
9862 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
9863 NULL
, NULL
, &objfile
->objfile_obstack
);
9867 if (die
->child
!= NULL
)
9869 struct die_info
*child_die
= die
->child
;
9871 while (child_die
&& child_die
->tag
)
9873 process_die (child_die
, cu
);
9874 child_die
= sibling_die (child_die
);
9879 /* Read a Fortran module as type. This DIE can be only a declaration used for
9880 imported module. Still we need that type as local Fortran "use ... only"
9881 declaration imports depend on the created type in determine_prefix. */
9883 static struct type
*
9884 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9886 struct objfile
*objfile
= cu
->objfile
;
9890 module_name
= dwarf2_name (die
, cu
);
9892 complaint (&symfile_complaints
,
9893 _("DW_TAG_module has no name, offset 0x%x"),
9894 die
->offset
.sect_off
);
9895 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
9897 /* determine_prefix uses TYPE_TAG_NAME. */
9898 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9900 return set_die_type (die
, type
, cu
);
9903 /* Read a Fortran module. */
9906 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
9908 struct die_info
*child_die
= die
->child
;
9910 while (child_die
&& child_die
->tag
)
9912 process_die (child_die
, cu
);
9913 child_die
= sibling_die (child_die
);
9917 /* Return the name of the namespace represented by DIE. Set
9918 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
9922 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
9924 struct die_info
*current_die
;
9925 const char *name
= NULL
;
9927 /* Loop through the extensions until we find a name. */
9929 for (current_die
= die
;
9930 current_die
!= NULL
;
9931 current_die
= dwarf2_extension (die
, &cu
))
9933 name
= dwarf2_name (current_die
, cu
);
9938 /* Is it an anonymous namespace? */
9940 *is_anonymous
= (name
== NULL
);
9942 name
= CP_ANONYMOUS_NAMESPACE_STR
;
9947 /* Extract all information from a DW_TAG_pointer_type DIE and add to
9948 the user defined type vector. */
9950 static struct type
*
9951 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9953 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
9954 struct comp_unit_head
*cu_header
= &cu
->header
;
9956 struct attribute
*attr_byte_size
;
9957 struct attribute
*attr_address_class
;
9958 int byte_size
, addr_class
;
9959 struct type
*target_type
;
9961 target_type
= die_type (die
, cu
);
9963 /* The die_type call above may have already set the type for this DIE. */
9964 type
= get_die_type (die
, cu
);
9968 type
= lookup_pointer_type (target_type
);
9970 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9972 byte_size
= DW_UNSND (attr_byte_size
);
9974 byte_size
= cu_header
->addr_size
;
9976 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
9977 if (attr_address_class
)
9978 addr_class
= DW_UNSND (attr_address_class
);
9980 addr_class
= DW_ADDR_none
;
9982 /* If the pointer size or address class is different than the
9983 default, create a type variant marked as such and set the
9984 length accordingly. */
9985 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
9987 if (gdbarch_address_class_type_flags_p (gdbarch
))
9991 type_flags
= gdbarch_address_class_type_flags
9992 (gdbarch
, byte_size
, addr_class
);
9993 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
9995 type
= make_type_with_address_space (type
, type_flags
);
9997 else if (TYPE_LENGTH (type
) != byte_size
)
9999 complaint (&symfile_complaints
,
10000 _("invalid pointer size %d"), byte_size
);
10004 /* Should we also complain about unhandled address classes? */
10008 TYPE_LENGTH (type
) = byte_size
;
10009 return set_die_type (die
, type
, cu
);
10012 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
10013 the user defined type vector. */
10015 static struct type
*
10016 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10019 struct type
*to_type
;
10020 struct type
*domain
;
10022 to_type
= die_type (die
, cu
);
10023 domain
= die_containing_type (die
, cu
);
10025 /* The calls above may have already set the type for this DIE. */
10026 type
= get_die_type (die
, cu
);
10030 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
10031 type
= lookup_methodptr_type (to_type
);
10033 type
= lookup_memberptr_type (to_type
, domain
);
10035 return set_die_type (die
, type
, cu
);
10038 /* Extract all information from a DW_TAG_reference_type DIE and add to
10039 the user defined type vector. */
10041 static struct type
*
10042 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10044 struct comp_unit_head
*cu_header
= &cu
->header
;
10045 struct type
*type
, *target_type
;
10046 struct attribute
*attr
;
10048 target_type
= die_type (die
, cu
);
10050 /* The die_type call above may have already set the type for this DIE. */
10051 type
= get_die_type (die
, cu
);
10055 type
= lookup_reference_type (target_type
);
10056 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10059 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10063 TYPE_LENGTH (type
) = cu_header
->addr_size
;
10065 return set_die_type (die
, type
, cu
);
10068 static struct type
*
10069 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10071 struct type
*base_type
, *cv_type
;
10073 base_type
= die_type (die
, cu
);
10075 /* The die_type call above may have already set the type for this DIE. */
10076 cv_type
= get_die_type (die
, cu
);
10080 /* In case the const qualifier is applied to an array type, the element type
10081 is so qualified, not the array type (section 6.7.3 of C99). */
10082 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
10084 struct type
*el_type
, *inner_array
;
10086 base_type
= copy_type (base_type
);
10087 inner_array
= base_type
;
10089 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
10091 TYPE_TARGET_TYPE (inner_array
) =
10092 copy_type (TYPE_TARGET_TYPE (inner_array
));
10093 inner_array
= TYPE_TARGET_TYPE (inner_array
);
10096 el_type
= TYPE_TARGET_TYPE (inner_array
);
10097 TYPE_TARGET_TYPE (inner_array
) =
10098 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
10100 return set_die_type (die
, base_type
, cu
);
10103 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
10104 return set_die_type (die
, cv_type
, cu
);
10107 static struct type
*
10108 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10110 struct type
*base_type
, *cv_type
;
10112 base_type
= die_type (die
, cu
);
10114 /* The die_type call above may have already set the type for this DIE. */
10115 cv_type
= get_die_type (die
, cu
);
10119 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
10120 return set_die_type (die
, cv_type
, cu
);
10123 /* Extract all information from a DW_TAG_string_type DIE and add to
10124 the user defined type vector. It isn't really a user defined type,
10125 but it behaves like one, with other DIE's using an AT_user_def_type
10126 attribute to reference it. */
10128 static struct type
*
10129 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10131 struct objfile
*objfile
= cu
->objfile
;
10132 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10133 struct type
*type
, *range_type
, *index_type
, *char_type
;
10134 struct attribute
*attr
;
10135 unsigned int length
;
10137 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
10140 length
= DW_UNSND (attr
);
10144 /* Check for the DW_AT_byte_size attribute. */
10145 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10148 length
= DW_UNSND (attr
);
10156 index_type
= objfile_type (objfile
)->builtin_int
;
10157 range_type
= create_range_type (NULL
, index_type
, 1, length
);
10158 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
10159 type
= create_string_type (NULL
, char_type
, range_type
);
10161 return set_die_type (die
, type
, cu
);
10164 /* Handle DIES due to C code like:
10168 int (*funcp)(int a, long l);
10172 ('funcp' generates a DW_TAG_subroutine_type DIE). */
10174 static struct type
*
10175 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10177 struct objfile
*objfile
= cu
->objfile
;
10178 struct type
*type
; /* Type that this function returns. */
10179 struct type
*ftype
; /* Function that returns above type. */
10180 struct attribute
*attr
;
10182 type
= die_type (die
, cu
);
10184 /* The die_type call above may have already set the type for this DIE. */
10185 ftype
= get_die_type (die
, cu
);
10189 ftype
= lookup_function_type (type
);
10191 /* All functions in C++, Pascal and Java have prototypes. */
10192 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
10193 if ((attr
&& (DW_UNSND (attr
) != 0))
10194 || cu
->language
== language_cplus
10195 || cu
->language
== language_java
10196 || cu
->language
== language_pascal
)
10197 TYPE_PROTOTYPED (ftype
) = 1;
10198 else if (producer_is_realview (cu
->producer
))
10199 /* RealView does not emit DW_AT_prototyped. We can not
10200 distinguish prototyped and unprototyped functions; default to
10201 prototyped, since that is more common in modern code (and
10202 RealView warns about unprototyped functions). */
10203 TYPE_PROTOTYPED (ftype
) = 1;
10205 /* Store the calling convention in the type if it's available in
10206 the subroutine die. Otherwise set the calling convention to
10207 the default value DW_CC_normal. */
10208 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
10210 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
10211 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
10212 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
10214 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
10216 /* We need to add the subroutine type to the die immediately so
10217 we don't infinitely recurse when dealing with parameters
10218 declared as the same subroutine type. */
10219 set_die_type (die
, ftype
, cu
);
10221 if (die
->child
!= NULL
)
10223 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
10224 struct die_info
*child_die
;
10225 int nparams
, iparams
;
10227 /* Count the number of parameters.
10228 FIXME: GDB currently ignores vararg functions, but knows about
10229 vararg member functions. */
10231 child_die
= die
->child
;
10232 while (child_die
&& child_die
->tag
)
10234 if (child_die
->tag
== DW_TAG_formal_parameter
)
10236 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
10237 TYPE_VARARGS (ftype
) = 1;
10238 child_die
= sibling_die (child_die
);
10241 /* Allocate storage for parameters and fill them in. */
10242 TYPE_NFIELDS (ftype
) = nparams
;
10243 TYPE_FIELDS (ftype
) = (struct field
*)
10244 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
10246 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
10247 even if we error out during the parameters reading below. */
10248 for (iparams
= 0; iparams
< nparams
; iparams
++)
10249 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
10252 child_die
= die
->child
;
10253 while (child_die
&& child_die
->tag
)
10255 if (child_die
->tag
== DW_TAG_formal_parameter
)
10257 struct type
*arg_type
;
10259 /* DWARF version 2 has no clean way to discern C++
10260 static and non-static member functions. G++ helps
10261 GDB by marking the first parameter for non-static
10262 member functions (which is the this pointer) as
10263 artificial. We pass this information to
10264 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
10266 DWARF version 3 added DW_AT_object_pointer, which GCC
10267 4.5 does not yet generate. */
10268 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
10270 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
10273 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
10275 /* GCC/43521: In java, the formal parameter
10276 "this" is sometimes not marked with DW_AT_artificial. */
10277 if (cu
->language
== language_java
)
10279 const char *name
= dwarf2_name (child_die
, cu
);
10281 if (name
&& !strcmp (name
, "this"))
10282 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
10285 arg_type
= die_type (child_die
, cu
);
10287 /* RealView does not mark THIS as const, which the testsuite
10288 expects. GCC marks THIS as const in method definitions,
10289 but not in the class specifications (GCC PR 43053). */
10290 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
10291 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
10294 struct dwarf2_cu
*arg_cu
= cu
;
10295 const char *name
= dwarf2_name (child_die
, cu
);
10297 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
10300 /* If the compiler emits this, use it. */
10301 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
10304 else if (name
&& strcmp (name
, "this") == 0)
10305 /* Function definitions will have the argument names. */
10307 else if (name
== NULL
&& iparams
== 0)
10308 /* Declarations may not have the names, so like
10309 elsewhere in GDB, assume an artificial first
10310 argument is "this". */
10314 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
10318 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
10321 child_die
= sibling_die (child_die
);
10328 static struct type
*
10329 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
10331 struct objfile
*objfile
= cu
->objfile
;
10332 const char *name
= NULL
;
10333 struct type
*this_type
, *target_type
;
10335 name
= dwarf2_full_name (NULL
, die
, cu
);
10336 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
10337 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
10338 TYPE_NAME (this_type
) = (char *) name
;
10339 set_die_type (die
, this_type
, cu
);
10340 target_type
= die_type (die
, cu
);
10341 if (target_type
!= this_type
)
10342 TYPE_TARGET_TYPE (this_type
) = target_type
;
10345 /* Self-referential typedefs are, it seems, not allowed by the DWARF
10346 spec and cause infinite loops in GDB. */
10347 complaint (&symfile_complaints
,
10348 _("Self-referential DW_TAG_typedef "
10349 "- DIE at 0x%x [in module %s]"),
10350 die
->offset
.sect_off
, objfile
->name
);
10351 TYPE_TARGET_TYPE (this_type
) = NULL
;
10356 /* Find a representation of a given base type and install
10357 it in the TYPE field of the die. */
10359 static struct type
*
10360 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10362 struct objfile
*objfile
= cu
->objfile
;
10364 struct attribute
*attr
;
10365 int encoding
= 0, size
= 0;
10367 enum type_code code
= TYPE_CODE_INT
;
10368 int type_flags
= 0;
10369 struct type
*target_type
= NULL
;
10371 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
10374 encoding
= DW_UNSND (attr
);
10376 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10379 size
= DW_UNSND (attr
);
10381 name
= dwarf2_name (die
, cu
);
10384 complaint (&symfile_complaints
,
10385 _("DW_AT_name missing from DW_TAG_base_type"));
10390 case DW_ATE_address
:
10391 /* Turn DW_ATE_address into a void * pointer. */
10392 code
= TYPE_CODE_PTR
;
10393 type_flags
|= TYPE_FLAG_UNSIGNED
;
10394 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
10396 case DW_ATE_boolean
:
10397 code
= TYPE_CODE_BOOL
;
10398 type_flags
|= TYPE_FLAG_UNSIGNED
;
10400 case DW_ATE_complex_float
:
10401 code
= TYPE_CODE_COMPLEX
;
10402 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
10404 case DW_ATE_decimal_float
:
10405 code
= TYPE_CODE_DECFLOAT
;
10408 code
= TYPE_CODE_FLT
;
10410 case DW_ATE_signed
:
10412 case DW_ATE_unsigned
:
10413 type_flags
|= TYPE_FLAG_UNSIGNED
;
10414 if (cu
->language
== language_fortran
10416 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
10417 code
= TYPE_CODE_CHAR
;
10419 case DW_ATE_signed_char
:
10420 if (cu
->language
== language_ada
|| cu
->language
== language_m2
10421 || cu
->language
== language_pascal
10422 || cu
->language
== language_fortran
)
10423 code
= TYPE_CODE_CHAR
;
10425 case DW_ATE_unsigned_char
:
10426 if (cu
->language
== language_ada
|| cu
->language
== language_m2
10427 || cu
->language
== language_pascal
10428 || cu
->language
== language_fortran
)
10429 code
= TYPE_CODE_CHAR
;
10430 type_flags
|= TYPE_FLAG_UNSIGNED
;
10433 /* We just treat this as an integer and then recognize the
10434 type by name elsewhere. */
10438 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
10439 dwarf_type_encoding_name (encoding
));
10443 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
10444 TYPE_NAME (type
) = name
;
10445 TYPE_TARGET_TYPE (type
) = target_type
;
10447 if (name
&& strcmp (name
, "char") == 0)
10448 TYPE_NOSIGN (type
) = 1;
10450 return set_die_type (die
, type
, cu
);
10453 /* Read the given DW_AT_subrange DIE. */
10455 static struct type
*
10456 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10458 struct type
*base_type
;
10459 struct type
*range_type
;
10460 struct attribute
*attr
;
10462 int low_default_is_valid
;
10464 LONGEST negative_mask
;
10466 base_type
= die_type (die
, cu
);
10467 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
10468 check_typedef (base_type
);
10470 /* The die_type call above may have already set the type for this DIE. */
10471 range_type
= get_die_type (die
, cu
);
10475 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
10476 omitting DW_AT_lower_bound. */
10477 switch (cu
->language
)
10480 case language_cplus
:
10482 low_default_is_valid
= 1;
10484 case language_fortran
:
10486 low_default_is_valid
= 1;
10489 case language_java
:
10490 case language_objc
:
10492 low_default_is_valid
= (cu
->header
.version
>= 4);
10496 case language_pascal
:
10498 low_default_is_valid
= (cu
->header
.version
>= 4);
10502 low_default_is_valid
= 0;
10506 /* FIXME: For variable sized arrays either of these could be
10507 a variable rather than a constant value. We'll allow it,
10508 but we don't know how to handle it. */
10509 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
10511 low
= dwarf2_get_attr_constant_value (attr
, low
);
10512 else if (!low_default_is_valid
)
10513 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
10514 "- DIE at 0x%x [in module %s]"),
10515 die
->offset
.sect_off
, cu
->objfile
->name
);
10517 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
10520 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
10522 /* GCC encodes arrays with unspecified or dynamic length
10523 with a DW_FORM_block1 attribute or a reference attribute.
10524 FIXME: GDB does not yet know how to handle dynamic
10525 arrays properly, treat them as arrays with unspecified
10528 FIXME: jimb/2003-09-22: GDB does not really know
10529 how to handle arrays of unspecified length
10530 either; we just represent them as zero-length
10531 arrays. Choose an appropriate upper bound given
10532 the lower bound we've computed above. */
10536 high
= dwarf2_get_attr_constant_value (attr
, 1);
10540 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
10543 int count
= dwarf2_get_attr_constant_value (attr
, 1);
10544 high
= low
+ count
- 1;
10548 /* Unspecified array length. */
10553 /* Dwarf-2 specifications explicitly allows to create subrange types
10554 without specifying a base type.
10555 In that case, the base type must be set to the type of
10556 the lower bound, upper bound or count, in that order, if any of these
10557 three attributes references an object that has a type.
10558 If no base type is found, the Dwarf-2 specifications say that
10559 a signed integer type of size equal to the size of an address should
10561 For the following C code: `extern char gdb_int [];'
10562 GCC produces an empty range DIE.
10563 FIXME: muller/2010-05-28: Possible references to object for low bound,
10564 high bound or count are not yet handled by this code. */
10565 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
10567 struct objfile
*objfile
= cu
->objfile
;
10568 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10569 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
10570 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
10572 /* Test "int", "long int", and "long long int" objfile types,
10573 and select the first one having a size above or equal to the
10574 architecture address size. */
10575 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10576 base_type
= int_type
;
10579 int_type
= objfile_type (objfile
)->builtin_long
;
10580 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10581 base_type
= int_type
;
10584 int_type
= objfile_type (objfile
)->builtin_long_long
;
10585 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10586 base_type
= int_type
;
10592 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
10593 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
10594 low
|= negative_mask
;
10595 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
10596 high
|= negative_mask
;
10598 range_type
= create_range_type (NULL
, base_type
, low
, high
);
10600 /* Mark arrays with dynamic length at least as an array of unspecified
10601 length. GDB could check the boundary but before it gets implemented at
10602 least allow accessing the array elements. */
10603 if (attr
&& attr_form_is_block (attr
))
10604 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
10606 /* Ada expects an empty array on no boundary attributes. */
10607 if (attr
== NULL
&& cu
->language
!= language_ada
)
10608 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
10610 name
= dwarf2_name (die
, cu
);
10612 TYPE_NAME (range_type
) = name
;
10614 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10616 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
10618 set_die_type (die
, range_type
, cu
);
10620 /* set_die_type should be already done. */
10621 set_descriptive_type (range_type
, die
, cu
);
10626 static struct type
*
10627 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10631 /* For now, we only support the C meaning of an unspecified type: void. */
10633 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
10634 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
10636 return set_die_type (die
, type
, cu
);
10639 /* Read a single die and all its descendents. Set the die's sibling
10640 field to NULL; set other fields in the die correctly, and set all
10641 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
10642 location of the info_ptr after reading all of those dies. PARENT
10643 is the parent of the die in question. */
10645 static struct die_info
*
10646 read_die_and_children (const struct die_reader_specs
*reader
,
10647 gdb_byte
*info_ptr
,
10648 gdb_byte
**new_info_ptr
,
10649 struct die_info
*parent
)
10651 struct die_info
*die
;
10655 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
10658 *new_info_ptr
= cur_ptr
;
10661 store_in_ref_table (die
, reader
->cu
);
10664 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
10668 *new_info_ptr
= cur_ptr
;
10671 die
->sibling
= NULL
;
10672 die
->parent
= parent
;
10676 /* Read a die, all of its descendents, and all of its siblings; set
10677 all of the fields of all of the dies correctly. Arguments are as
10678 in read_die_and_children. */
10680 static struct die_info
*
10681 read_die_and_siblings (const struct die_reader_specs
*reader
,
10682 gdb_byte
*info_ptr
,
10683 gdb_byte
**new_info_ptr
,
10684 struct die_info
*parent
)
10686 struct die_info
*first_die
, *last_sibling
;
10689 cur_ptr
= info_ptr
;
10690 first_die
= last_sibling
= NULL
;
10694 struct die_info
*die
10695 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
10699 *new_info_ptr
= cur_ptr
;
10706 last_sibling
->sibling
= die
;
10708 last_sibling
= die
;
10712 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
10714 The caller is responsible for filling in the extra attributes
10715 and updating (*DIEP)->num_attrs.
10716 Set DIEP to point to a newly allocated die with its information,
10717 except for its child, sibling, and parent fields.
10718 Set HAS_CHILDREN to tell whether the die has children or not. */
10721 read_full_die_1 (const struct die_reader_specs
*reader
,
10722 struct die_info
**diep
, gdb_byte
*info_ptr
,
10723 int *has_children
, int num_extra_attrs
)
10725 unsigned int abbrev_number
, bytes_read
, i
;
10726 sect_offset offset
;
10727 struct abbrev_info
*abbrev
;
10728 struct die_info
*die
;
10729 struct dwarf2_cu
*cu
= reader
->cu
;
10730 bfd
*abfd
= reader
->abfd
;
10732 offset
.sect_off
= info_ptr
- reader
->buffer
;
10733 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10734 info_ptr
+= bytes_read
;
10735 if (!abbrev_number
)
10742 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
10744 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
10746 bfd_get_filename (abfd
));
10748 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
10749 die
->offset
= offset
;
10750 die
->tag
= abbrev
->tag
;
10751 die
->abbrev
= abbrev_number
;
10753 /* Make the result usable.
10754 The caller needs to update num_attrs after adding the extra
10756 die
->num_attrs
= abbrev
->num_attrs
;
10758 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
10759 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
10763 *has_children
= abbrev
->has_children
;
10767 /* Read a die and all its attributes.
10768 Set DIEP to point to a newly allocated die with its information,
10769 except for its child, sibling, and parent fields.
10770 Set HAS_CHILDREN to tell whether the die has children or not. */
10773 read_full_die (const struct die_reader_specs
*reader
,
10774 struct die_info
**diep
, gdb_byte
*info_ptr
,
10777 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
10780 /* In DWARF version 2, the description of the debugging information is
10781 stored in a separate .debug_abbrev section. Before we read any
10782 dies from a section we read in all abbreviations and install them
10783 in a hash table. This function also sets flags in CU describing
10784 the data found in the abbrev table. */
10787 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
10788 struct dwarf2_section_info
*abbrev_section
)
10791 bfd
*abfd
= abbrev_section
->asection
->owner
;
10792 struct comp_unit_head
*cu_header
= &cu
->header
;
10793 gdb_byte
*abbrev_ptr
;
10794 struct abbrev_info
*cur_abbrev
;
10795 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
10796 unsigned int abbrev_form
, hash_number
;
10797 struct attr_abbrev
*cur_attrs
;
10798 unsigned int allocated_attrs
;
10800 /* Initialize dwarf2 abbrevs. */
10801 obstack_init (&cu
->abbrev_obstack
);
10802 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
10804 * sizeof (struct abbrev_info
*)));
10805 memset (cu
->dwarf2_abbrevs
, 0,
10806 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
10808 dwarf2_read_section (cu
->objfile
, abbrev_section
);
10809 abbrev_ptr
= abbrev_section
->buffer
+ cu_header
->abbrev_offset
.sect_off
;
10810 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10811 abbrev_ptr
+= bytes_read
;
10813 allocated_attrs
= ATTR_ALLOC_CHUNK
;
10814 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
10816 /* Loop until we reach an abbrev number of 0. */
10817 while (abbrev_number
)
10819 cur_abbrev
= dwarf_alloc_abbrev (cu
);
10821 /* read in abbrev header */
10822 cur_abbrev
->number
= abbrev_number
;
10823 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10824 abbrev_ptr
+= bytes_read
;
10825 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
10828 /* now read in declarations */
10829 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10830 abbrev_ptr
+= bytes_read
;
10831 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10832 abbrev_ptr
+= bytes_read
;
10833 while (abbrev_name
)
10835 if (cur_abbrev
->num_attrs
== allocated_attrs
)
10837 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
10839 = xrealloc (cur_attrs
, (allocated_attrs
10840 * sizeof (struct attr_abbrev
)));
10843 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
10844 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
10845 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10846 abbrev_ptr
+= bytes_read
;
10847 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10848 abbrev_ptr
+= bytes_read
;
10851 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
10852 (cur_abbrev
->num_attrs
10853 * sizeof (struct attr_abbrev
)));
10854 memcpy (cur_abbrev
->attrs
, cur_attrs
,
10855 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
10857 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
10858 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
10859 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
10861 /* Get next abbreviation.
10862 Under Irix6 the abbreviations for a compilation unit are not
10863 always properly terminated with an abbrev number of 0.
10864 Exit loop if we encounter an abbreviation which we have
10865 already read (which means we are about to read the abbreviations
10866 for the next compile unit) or if the end of the abbreviation
10867 table is reached. */
10868 if ((unsigned int) (abbrev_ptr
- abbrev_section
->buffer
)
10869 >= abbrev_section
->size
)
10871 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10872 abbrev_ptr
+= bytes_read
;
10873 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
10880 /* Release the memory used by the abbrev table for a compilation unit. */
10883 dwarf2_free_abbrev_table (void *ptr_to_cu
)
10885 struct dwarf2_cu
*cu
= ptr_to_cu
;
10887 obstack_free (&cu
->abbrev_obstack
, NULL
);
10888 cu
->dwarf2_abbrevs
= NULL
;
10891 /* Lookup an abbrev_info structure in the abbrev hash table. */
10893 static struct abbrev_info
*
10894 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
10896 unsigned int hash_number
;
10897 struct abbrev_info
*abbrev
;
10899 hash_number
= number
% ABBREV_HASH_SIZE
;
10900 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
10904 if (abbrev
->number
== number
)
10907 abbrev
= abbrev
->next
;
10912 /* Returns nonzero if TAG represents a type that we might generate a partial
10916 is_type_tag_for_partial (int tag
)
10921 /* Some types that would be reasonable to generate partial symbols for,
10922 that we don't at present. */
10923 case DW_TAG_array_type
:
10924 case DW_TAG_file_type
:
10925 case DW_TAG_ptr_to_member_type
:
10926 case DW_TAG_set_type
:
10927 case DW_TAG_string_type
:
10928 case DW_TAG_subroutine_type
:
10930 case DW_TAG_base_type
:
10931 case DW_TAG_class_type
:
10932 case DW_TAG_interface_type
:
10933 case DW_TAG_enumeration_type
:
10934 case DW_TAG_structure_type
:
10935 case DW_TAG_subrange_type
:
10936 case DW_TAG_typedef
:
10937 case DW_TAG_union_type
:
10944 /* Load all DIEs that are interesting for partial symbols into memory. */
10946 static struct partial_die_info
*
10947 load_partial_dies (const struct die_reader_specs
*reader
,
10948 gdb_byte
*info_ptr
, int building_psymtab
)
10950 struct dwarf2_cu
*cu
= reader
->cu
;
10951 struct objfile
*objfile
= cu
->objfile
;
10952 struct partial_die_info
*part_die
;
10953 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
10954 struct abbrev_info
*abbrev
;
10955 unsigned int bytes_read
;
10956 unsigned int load_all
= 0;
10957 int nesting_level
= 1;
10962 gdb_assert (cu
->per_cu
!= NULL
);
10963 if (cu
->per_cu
->load_all_dies
)
10967 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10971 &cu
->comp_unit_obstack
,
10972 hashtab_obstack_allocate
,
10973 dummy_obstack_deallocate
);
10975 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
10976 sizeof (struct partial_die_info
));
10980 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
10982 /* A NULL abbrev means the end of a series of children. */
10983 if (abbrev
== NULL
)
10985 if (--nesting_level
== 0)
10987 /* PART_DIE was probably the last thing allocated on the
10988 comp_unit_obstack, so we could call obstack_free
10989 here. We don't do that because the waste is small,
10990 and will be cleaned up when we're done with this
10991 compilation unit. This way, we're also more robust
10992 against other users of the comp_unit_obstack. */
10995 info_ptr
+= bytes_read
;
10996 last_die
= parent_die
;
10997 parent_die
= parent_die
->die_parent
;
11001 /* Check for template arguments. We never save these; if
11002 they're seen, we just mark the parent, and go on our way. */
11003 if (parent_die
!= NULL
11004 && cu
->language
== language_cplus
11005 && (abbrev
->tag
== DW_TAG_template_type_param
11006 || abbrev
->tag
== DW_TAG_template_value_param
))
11008 parent_die
->has_template_arguments
= 1;
11012 /* We don't need a partial DIE for the template argument. */
11013 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11018 /* We only recurse into c++ subprograms looking for template arguments.
11019 Skip their other children. */
11021 && cu
->language
== language_cplus
11022 && parent_die
!= NULL
11023 && parent_die
->tag
== DW_TAG_subprogram
)
11025 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11029 /* Check whether this DIE is interesting enough to save. Normally
11030 we would not be interested in members here, but there may be
11031 later variables referencing them via DW_AT_specification (for
11032 static members). */
11034 && !is_type_tag_for_partial (abbrev
->tag
)
11035 && abbrev
->tag
!= DW_TAG_constant
11036 && abbrev
->tag
!= DW_TAG_enumerator
11037 && abbrev
->tag
!= DW_TAG_subprogram
11038 && abbrev
->tag
!= DW_TAG_lexical_block
11039 && abbrev
->tag
!= DW_TAG_variable
11040 && abbrev
->tag
!= DW_TAG_namespace
11041 && abbrev
->tag
!= DW_TAG_module
11042 && abbrev
->tag
!= DW_TAG_member
11043 && abbrev
->tag
!= DW_TAG_imported_unit
)
11045 /* Otherwise we skip to the next sibling, if any. */
11046 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11050 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
11053 /* This two-pass algorithm for processing partial symbols has a
11054 high cost in cache pressure. Thus, handle some simple cases
11055 here which cover the majority of C partial symbols. DIEs
11056 which neither have specification tags in them, nor could have
11057 specification tags elsewhere pointing at them, can simply be
11058 processed and discarded.
11060 This segment is also optional; scan_partial_symbols and
11061 add_partial_symbol will handle these DIEs if we chain
11062 them in normally. When compilers which do not emit large
11063 quantities of duplicate debug information are more common,
11064 this code can probably be removed. */
11066 /* Any complete simple types at the top level (pretty much all
11067 of them, for a language without namespaces), can be processed
11069 if (parent_die
== NULL
11070 && part_die
->has_specification
== 0
11071 && part_die
->is_declaration
== 0
11072 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
11073 || part_die
->tag
== DW_TAG_base_type
11074 || part_die
->tag
== DW_TAG_subrange_type
))
11076 if (building_psymtab
&& part_die
->name
!= NULL
)
11077 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
11078 VAR_DOMAIN
, LOC_TYPEDEF
,
11079 &objfile
->static_psymbols
,
11080 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
11081 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
11085 /* The exception for DW_TAG_typedef with has_children above is
11086 a workaround of GCC PR debug/47510. In the case of this complaint
11087 type_name_no_tag_or_error will error on such types later.
11089 GDB skipped children of DW_TAG_typedef by the shortcut above and then
11090 it could not find the child DIEs referenced later, this is checked
11091 above. In correct DWARF DW_TAG_typedef should have no children. */
11093 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
11094 complaint (&symfile_complaints
,
11095 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
11096 "- DIE at 0x%x [in module %s]"),
11097 part_die
->offset
.sect_off
, objfile
->name
);
11099 /* If we're at the second level, and we're an enumerator, and
11100 our parent has no specification (meaning possibly lives in a
11101 namespace elsewhere), then we can add the partial symbol now
11102 instead of queueing it. */
11103 if (part_die
->tag
== DW_TAG_enumerator
11104 && parent_die
!= NULL
11105 && parent_die
->die_parent
== NULL
11106 && parent_die
->tag
== DW_TAG_enumeration_type
11107 && parent_die
->has_specification
== 0)
11109 if (part_die
->name
== NULL
)
11110 complaint (&symfile_complaints
,
11111 _("malformed enumerator DIE ignored"));
11112 else if (building_psymtab
)
11113 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
11114 VAR_DOMAIN
, LOC_CONST
,
11115 (cu
->language
== language_cplus
11116 || cu
->language
== language_java
)
11117 ? &objfile
->global_psymbols
11118 : &objfile
->static_psymbols
,
11119 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
11121 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
11125 /* We'll save this DIE so link it in. */
11126 part_die
->die_parent
= parent_die
;
11127 part_die
->die_sibling
= NULL
;
11128 part_die
->die_child
= NULL
;
11130 if (last_die
&& last_die
== parent_die
)
11131 last_die
->die_child
= part_die
;
11133 last_die
->die_sibling
= part_die
;
11135 last_die
= part_die
;
11137 if (first_die
== NULL
)
11138 first_die
= part_die
;
11140 /* Maybe add the DIE to the hash table. Not all DIEs that we
11141 find interesting need to be in the hash table, because we
11142 also have the parent/sibling/child chains; only those that we
11143 might refer to by offset later during partial symbol reading.
11145 For now this means things that might have be the target of a
11146 DW_AT_specification, DW_AT_abstract_origin, or
11147 DW_AT_extension. DW_AT_extension will refer only to
11148 namespaces; DW_AT_abstract_origin refers to functions (and
11149 many things under the function DIE, but we do not recurse
11150 into function DIEs during partial symbol reading) and
11151 possibly variables as well; DW_AT_specification refers to
11152 declarations. Declarations ought to have the DW_AT_declaration
11153 flag. It happens that GCC forgets to put it in sometimes, but
11154 only for functions, not for types.
11156 Adding more things than necessary to the hash table is harmless
11157 except for the performance cost. Adding too few will result in
11158 wasted time in find_partial_die, when we reread the compilation
11159 unit with load_all_dies set. */
11162 || abbrev
->tag
== DW_TAG_constant
11163 || abbrev
->tag
== DW_TAG_subprogram
11164 || abbrev
->tag
== DW_TAG_variable
11165 || abbrev
->tag
== DW_TAG_namespace
11166 || part_die
->is_declaration
)
11170 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
11171 part_die
->offset
.sect_off
, INSERT
);
11175 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
11176 sizeof (struct partial_die_info
));
11178 /* For some DIEs we want to follow their children (if any). For C
11179 we have no reason to follow the children of structures; for other
11180 languages we have to, so that we can get at method physnames
11181 to infer fully qualified class names, for DW_AT_specification,
11182 and for C++ template arguments. For C++, we also look one level
11183 inside functions to find template arguments (if the name of the
11184 function does not already contain the template arguments).
11186 For Ada, we need to scan the children of subprograms and lexical
11187 blocks as well because Ada allows the definition of nested
11188 entities that could be interesting for the debugger, such as
11189 nested subprograms for instance. */
11190 if (last_die
->has_children
11192 || last_die
->tag
== DW_TAG_namespace
11193 || last_die
->tag
== DW_TAG_module
11194 || last_die
->tag
== DW_TAG_enumeration_type
11195 || (cu
->language
== language_cplus
11196 && last_die
->tag
== DW_TAG_subprogram
11197 && (last_die
->name
== NULL
11198 || strchr (last_die
->name
, '<') == NULL
))
11199 || (cu
->language
!= language_c
11200 && (last_die
->tag
== DW_TAG_class_type
11201 || last_die
->tag
== DW_TAG_interface_type
11202 || last_die
->tag
== DW_TAG_structure_type
11203 || last_die
->tag
== DW_TAG_union_type
))
11204 || (cu
->language
== language_ada
11205 && (last_die
->tag
== DW_TAG_subprogram
11206 || last_die
->tag
== DW_TAG_lexical_block
))))
11209 parent_die
= last_die
;
11213 /* Otherwise we skip to the next sibling, if any. */
11214 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
11216 /* Back to the top, do it again. */
11220 /* Read a minimal amount of information into the minimal die structure. */
11223 read_partial_die (const struct die_reader_specs
*reader
,
11224 struct partial_die_info
*part_die
,
11225 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
11226 gdb_byte
*info_ptr
)
11228 struct dwarf2_cu
*cu
= reader
->cu
;
11229 struct objfile
*objfile
= cu
->objfile
;
11230 gdb_byte
*buffer
= reader
->buffer
;
11232 struct attribute attr
;
11233 int has_low_pc_attr
= 0;
11234 int has_high_pc_attr
= 0;
11235 int high_pc_relative
= 0;
11237 memset (part_die
, 0, sizeof (struct partial_die_info
));
11239 part_die
->offset
.sect_off
= info_ptr
- buffer
;
11241 info_ptr
+= abbrev_len
;
11243 if (abbrev
== NULL
)
11246 part_die
->tag
= abbrev
->tag
;
11247 part_die
->has_children
= abbrev
->has_children
;
11249 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
11251 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
11253 /* Store the data if it is of an attribute we want to keep in a
11254 partial symbol table. */
11258 switch (part_die
->tag
)
11260 case DW_TAG_compile_unit
:
11261 case DW_TAG_partial_unit
:
11262 case DW_TAG_type_unit
:
11263 /* Compilation units have a DW_AT_name that is a filename, not
11264 a source language identifier. */
11265 case DW_TAG_enumeration_type
:
11266 case DW_TAG_enumerator
:
11267 /* These tags always have simple identifiers already; no need
11268 to canonicalize them. */
11269 part_die
->name
= DW_STRING (&attr
);
11273 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
11274 &objfile
->objfile_obstack
);
11278 case DW_AT_linkage_name
:
11279 case DW_AT_MIPS_linkage_name
:
11280 /* Note that both forms of linkage name might appear. We
11281 assume they will be the same, and we only store the last
11283 if (cu
->language
== language_ada
)
11284 part_die
->name
= DW_STRING (&attr
);
11285 part_die
->linkage_name
= DW_STRING (&attr
);
11288 has_low_pc_attr
= 1;
11289 part_die
->lowpc
= DW_ADDR (&attr
);
11291 case DW_AT_high_pc
:
11292 has_high_pc_attr
= 1;
11293 if (attr
.form
== DW_FORM_addr
11294 || attr
.form
== DW_FORM_GNU_addr_index
)
11295 part_die
->highpc
= DW_ADDR (&attr
);
11298 high_pc_relative
= 1;
11299 part_die
->highpc
= DW_UNSND (&attr
);
11302 case DW_AT_location
:
11303 /* Support the .debug_loc offsets. */
11304 if (attr_form_is_block (&attr
))
11306 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
11308 else if (attr_form_is_section_offset (&attr
))
11310 dwarf2_complex_location_expr_complaint ();
11314 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11315 "partial symbol information");
11318 case DW_AT_external
:
11319 part_die
->is_external
= DW_UNSND (&attr
);
11321 case DW_AT_declaration
:
11322 part_die
->is_declaration
= DW_UNSND (&attr
);
11325 part_die
->has_type
= 1;
11327 case DW_AT_abstract_origin
:
11328 case DW_AT_specification
:
11329 case DW_AT_extension
:
11330 part_die
->has_specification
= 1;
11331 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
11333 case DW_AT_sibling
:
11334 /* Ignore absolute siblings, they might point outside of
11335 the current compile unit. */
11336 if (attr
.form
== DW_FORM_ref_addr
)
11337 complaint (&symfile_complaints
,
11338 _("ignoring absolute DW_AT_sibling"));
11340 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
11342 case DW_AT_byte_size
:
11343 part_die
->has_byte_size
= 1;
11345 case DW_AT_calling_convention
:
11346 /* DWARF doesn't provide a way to identify a program's source-level
11347 entry point. DW_AT_calling_convention attributes are only meant
11348 to describe functions' calling conventions.
11350 However, because it's a necessary piece of information in
11351 Fortran, and because DW_CC_program is the only piece of debugging
11352 information whose definition refers to a 'main program' at all,
11353 several compilers have begun marking Fortran main programs with
11354 DW_CC_program --- even when those functions use the standard
11355 calling conventions.
11357 So until DWARF specifies a way to provide this information and
11358 compilers pick up the new representation, we'll support this
11360 if (DW_UNSND (&attr
) == DW_CC_program
11361 && cu
->language
== language_fortran
)
11363 set_main_name (part_die
->name
);
11365 /* As this DIE has a static linkage the name would be difficult
11366 to look up later. */
11367 language_of_main
= language_fortran
;
11371 if (DW_UNSND (&attr
) == DW_INL_inlined
11372 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
11373 part_die
->may_be_inlined
= 1;
11377 if (part_die
->tag
== DW_TAG_imported_unit
)
11378 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
11386 if (high_pc_relative
)
11387 part_die
->highpc
+= part_die
->lowpc
;
11389 if (has_low_pc_attr
&& has_high_pc_attr
)
11391 /* When using the GNU linker, .gnu.linkonce. sections are used to
11392 eliminate duplicate copies of functions and vtables and such.
11393 The linker will arbitrarily choose one and discard the others.
11394 The AT_*_pc values for such functions refer to local labels in
11395 these sections. If the section from that file was discarded, the
11396 labels are not in the output, so the relocs get a value of 0.
11397 If this is a discarded function, mark the pc bounds as invalid,
11398 so that GDB will ignore it. */
11399 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11401 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11403 complaint (&symfile_complaints
,
11404 _("DW_AT_low_pc %s is zero "
11405 "for DIE at 0x%x [in module %s]"),
11406 paddress (gdbarch
, part_die
->lowpc
),
11407 part_die
->offset
.sect_off
, objfile
->name
);
11409 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
11410 else if (part_die
->lowpc
>= part_die
->highpc
)
11412 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11414 complaint (&symfile_complaints
,
11415 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
11416 "for DIE at 0x%x [in module %s]"),
11417 paddress (gdbarch
, part_die
->lowpc
),
11418 paddress (gdbarch
, part_die
->highpc
),
11419 part_die
->offset
.sect_off
, objfile
->name
);
11422 part_die
->has_pc_info
= 1;
11428 /* Find a cached partial DIE at OFFSET in CU. */
11430 static struct partial_die_info
*
11431 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
11433 struct partial_die_info
*lookup_die
= NULL
;
11434 struct partial_die_info part_die
;
11436 part_die
.offset
= offset
;
11437 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
11443 /* Find a partial DIE at OFFSET, which may or may not be in CU,
11444 except in the case of .debug_types DIEs which do not reference
11445 outside their CU (they do however referencing other types via
11446 DW_FORM_ref_sig8). */
11448 static struct partial_die_info
*
11449 find_partial_die (sect_offset offset
, struct dwarf2_cu
*cu
)
11451 struct objfile
*objfile
= cu
->objfile
;
11452 struct dwarf2_per_cu_data
*per_cu
= NULL
;
11453 struct partial_die_info
*pd
= NULL
;
11455 if (offset_in_cu_p (&cu
->header
, offset
))
11457 pd
= find_partial_die_in_comp_unit (offset
, cu
);
11460 /* We missed recording what we needed.
11461 Load all dies and try again. */
11462 per_cu
= cu
->per_cu
;
11466 /* TUs don't reference other CUs/TUs (except via type signatures). */
11467 if (cu
->per_cu
->is_debug_types
)
11469 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
11470 " external reference to offset 0x%lx [in module %s].\n"),
11471 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
11472 bfd_get_filename (objfile
->obfd
));
11474 per_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11476 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
11477 load_partial_comp_unit (per_cu
);
11479 per_cu
->cu
->last_used
= 0;
11480 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
11483 /* If we didn't find it, and not all dies have been loaded,
11484 load them all and try again. */
11486 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
11488 per_cu
->load_all_dies
= 1;
11490 /* This is nasty. When we reread the DIEs, somewhere up the call chain
11491 THIS_CU->cu may already be in use. So we can't just free it and
11492 replace its DIEs with the ones we read in. Instead, we leave those
11493 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
11494 and clobber THIS_CU->cu->partial_dies with the hash table for the new
11496 load_partial_comp_unit (per_cu
);
11498 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
11502 internal_error (__FILE__
, __LINE__
,
11503 _("could not find partial DIE 0x%x "
11504 "in cache [from module %s]\n"),
11505 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
11509 /* See if we can figure out if the class lives in a namespace. We do
11510 this by looking for a member function; its demangled name will
11511 contain namespace info, if there is any. */
11514 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
11515 struct dwarf2_cu
*cu
)
11517 /* NOTE: carlton/2003-10-07: Getting the info this way changes
11518 what template types look like, because the demangler
11519 frequently doesn't give the same name as the debug info. We
11520 could fix this by only using the demangled name to get the
11521 prefix (but see comment in read_structure_type). */
11523 struct partial_die_info
*real_pdi
;
11524 struct partial_die_info
*child_pdi
;
11526 /* If this DIE (this DIE's specification, if any) has a parent, then
11527 we should not do this. We'll prepend the parent's fully qualified
11528 name when we create the partial symbol. */
11530 real_pdi
= struct_pdi
;
11531 while (real_pdi
->has_specification
)
11532 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
11534 if (real_pdi
->die_parent
!= NULL
)
11537 for (child_pdi
= struct_pdi
->die_child
;
11539 child_pdi
= child_pdi
->die_sibling
)
11541 if (child_pdi
->tag
== DW_TAG_subprogram
11542 && child_pdi
->linkage_name
!= NULL
)
11544 char *actual_class_name
11545 = language_class_name_from_physname (cu
->language_defn
,
11546 child_pdi
->linkage_name
);
11547 if (actual_class_name
!= NULL
)
11550 = obsavestring (actual_class_name
,
11551 strlen (actual_class_name
),
11552 &cu
->objfile
->objfile_obstack
);
11553 xfree (actual_class_name
);
11560 /* Adjust PART_DIE before generating a symbol for it. This function
11561 may set the is_external flag or change the DIE's name. */
11564 fixup_partial_die (struct partial_die_info
*part_die
,
11565 struct dwarf2_cu
*cu
)
11567 /* Once we've fixed up a die, there's no point in doing so again.
11568 This also avoids a memory leak if we were to call
11569 guess_partial_die_structure_name multiple times. */
11570 if (part_die
->fixup_called
)
11573 /* If we found a reference attribute and the DIE has no name, try
11574 to find a name in the referred to DIE. */
11576 if (part_die
->name
== NULL
&& part_die
->has_specification
)
11578 struct partial_die_info
*spec_die
;
11580 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
11582 fixup_partial_die (spec_die
, cu
);
11584 if (spec_die
->name
)
11586 part_die
->name
= spec_die
->name
;
11588 /* Copy DW_AT_external attribute if it is set. */
11589 if (spec_die
->is_external
)
11590 part_die
->is_external
= spec_die
->is_external
;
11594 /* Set default names for some unnamed DIEs. */
11596 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
11597 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
11599 /* If there is no parent die to provide a namespace, and there are
11600 children, see if we can determine the namespace from their linkage
11602 if (cu
->language
== language_cplus
11603 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
11604 && part_die
->die_parent
== NULL
11605 && part_die
->has_children
11606 && (part_die
->tag
== DW_TAG_class_type
11607 || part_die
->tag
== DW_TAG_structure_type
11608 || part_die
->tag
== DW_TAG_union_type
))
11609 guess_partial_die_structure_name (part_die
, cu
);
11611 /* GCC might emit a nameless struct or union that has a linkage
11612 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
11613 if (part_die
->name
== NULL
11614 && (part_die
->tag
== DW_TAG_class_type
11615 || part_die
->tag
== DW_TAG_interface_type
11616 || part_die
->tag
== DW_TAG_structure_type
11617 || part_die
->tag
== DW_TAG_union_type
)
11618 && part_die
->linkage_name
!= NULL
)
11622 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
11627 /* Strip any leading namespaces/classes, keep only the base name.
11628 DW_AT_name for named DIEs does not contain the prefixes. */
11629 base
= strrchr (demangled
, ':');
11630 if (base
&& base
> demangled
&& base
[-1] == ':')
11635 part_die
->name
= obsavestring (base
, strlen (base
),
11636 &cu
->objfile
->objfile_obstack
);
11641 part_die
->fixup_called
= 1;
11644 /* Read an attribute value described by an attribute form. */
11647 read_attribute_value (const struct die_reader_specs
*reader
,
11648 struct attribute
*attr
, unsigned form
,
11649 gdb_byte
*info_ptr
)
11651 struct dwarf2_cu
*cu
= reader
->cu
;
11652 bfd
*abfd
= reader
->abfd
;
11653 struct comp_unit_head
*cu_header
= &cu
->header
;
11654 unsigned int bytes_read
;
11655 struct dwarf_block
*blk
;
11660 case DW_FORM_ref_addr
:
11661 if (cu
->header
.version
== 2)
11662 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
11664 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
11665 &cu
->header
, &bytes_read
);
11666 info_ptr
+= bytes_read
;
11669 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
11670 info_ptr
+= bytes_read
;
11672 case DW_FORM_block2
:
11673 blk
= dwarf_alloc_block (cu
);
11674 blk
->size
= read_2_bytes (abfd
, info_ptr
);
11676 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11677 info_ptr
+= blk
->size
;
11678 DW_BLOCK (attr
) = blk
;
11680 case DW_FORM_block4
:
11681 blk
= dwarf_alloc_block (cu
);
11682 blk
->size
= read_4_bytes (abfd
, info_ptr
);
11684 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11685 info_ptr
+= blk
->size
;
11686 DW_BLOCK (attr
) = blk
;
11688 case DW_FORM_data2
:
11689 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
11692 case DW_FORM_data4
:
11693 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
11696 case DW_FORM_data8
:
11697 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
11700 case DW_FORM_sec_offset
:
11701 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
11702 info_ptr
+= bytes_read
;
11704 case DW_FORM_string
:
11705 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
11706 DW_STRING_IS_CANONICAL (attr
) = 0;
11707 info_ptr
+= bytes_read
;
11710 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
11712 DW_STRING_IS_CANONICAL (attr
) = 0;
11713 info_ptr
+= bytes_read
;
11715 case DW_FORM_exprloc
:
11716 case DW_FORM_block
:
11717 blk
= dwarf_alloc_block (cu
);
11718 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11719 info_ptr
+= bytes_read
;
11720 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11721 info_ptr
+= blk
->size
;
11722 DW_BLOCK (attr
) = blk
;
11724 case DW_FORM_block1
:
11725 blk
= dwarf_alloc_block (cu
);
11726 blk
->size
= read_1_byte (abfd
, info_ptr
);
11728 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11729 info_ptr
+= blk
->size
;
11730 DW_BLOCK (attr
) = blk
;
11732 case DW_FORM_data1
:
11733 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
11737 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
11740 case DW_FORM_flag_present
:
11741 DW_UNSND (attr
) = 1;
11743 case DW_FORM_sdata
:
11744 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
11745 info_ptr
+= bytes_read
;
11747 case DW_FORM_udata
:
11748 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11749 info_ptr
+= bytes_read
;
11752 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11753 + read_1_byte (abfd
, info_ptr
));
11757 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11758 + read_2_bytes (abfd
, info_ptr
));
11762 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11763 + read_4_bytes (abfd
, info_ptr
));
11767 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11768 + read_8_bytes (abfd
, info_ptr
));
11771 case DW_FORM_ref_sig8
:
11772 /* Convert the signature to something we can record in DW_UNSND
11774 NOTE: This is NULL if the type wasn't found. */
11775 DW_SIGNATURED_TYPE (attr
) =
11776 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
11779 case DW_FORM_ref_udata
:
11780 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11781 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
11782 info_ptr
+= bytes_read
;
11784 case DW_FORM_indirect
:
11785 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11786 info_ptr
+= bytes_read
;
11787 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
11789 case DW_FORM_GNU_addr_index
:
11790 if (reader
->dwo_file
== NULL
)
11792 /* For now flag a hard error.
11793 Later we can turn this into a complaint. */
11794 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
11795 dwarf_form_name (form
),
11796 bfd_get_filename (abfd
));
11798 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
11799 info_ptr
+= bytes_read
;
11801 case DW_FORM_GNU_str_index
:
11802 if (reader
->dwo_file
== NULL
)
11804 /* For now flag a hard error.
11805 Later we can turn this into a complaint if warranted. */
11806 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
11807 dwarf_form_name (form
),
11808 bfd_get_filename (abfd
));
11811 ULONGEST str_index
=
11812 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11814 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
11815 DW_STRING_IS_CANONICAL (attr
) = 0;
11816 info_ptr
+= bytes_read
;
11820 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
11821 dwarf_form_name (form
),
11822 bfd_get_filename (abfd
));
11825 /* We have seen instances where the compiler tried to emit a byte
11826 size attribute of -1 which ended up being encoded as an unsigned
11827 0xffffffff. Although 0xffffffff is technically a valid size value,
11828 an object of this size seems pretty unlikely so we can relatively
11829 safely treat these cases as if the size attribute was invalid and
11830 treat them as zero by default. */
11831 if (attr
->name
== DW_AT_byte_size
11832 && form
== DW_FORM_data4
11833 && DW_UNSND (attr
) >= 0xffffffff)
11836 (&symfile_complaints
,
11837 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
11838 hex_string (DW_UNSND (attr
)));
11839 DW_UNSND (attr
) = 0;
11845 /* Read an attribute described by an abbreviated attribute. */
11848 read_attribute (const struct die_reader_specs
*reader
,
11849 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
11850 gdb_byte
*info_ptr
)
11852 attr
->name
= abbrev
->name
;
11853 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
11856 /* Read dwarf information from a buffer. */
11858 static unsigned int
11859 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
11861 return bfd_get_8 (abfd
, buf
);
11865 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
11867 return bfd_get_signed_8 (abfd
, buf
);
11870 static unsigned int
11871 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
11873 return bfd_get_16 (abfd
, buf
);
11877 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
11879 return bfd_get_signed_16 (abfd
, buf
);
11882 static unsigned int
11883 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
11885 return bfd_get_32 (abfd
, buf
);
11889 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
11891 return bfd_get_signed_32 (abfd
, buf
);
11895 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
11897 return bfd_get_64 (abfd
, buf
);
11901 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
11902 unsigned int *bytes_read
)
11904 struct comp_unit_head
*cu_header
= &cu
->header
;
11905 CORE_ADDR retval
= 0;
11907 if (cu_header
->signed_addr_p
)
11909 switch (cu_header
->addr_size
)
11912 retval
= bfd_get_signed_16 (abfd
, buf
);
11915 retval
= bfd_get_signed_32 (abfd
, buf
);
11918 retval
= bfd_get_signed_64 (abfd
, buf
);
11921 internal_error (__FILE__
, __LINE__
,
11922 _("read_address: bad switch, signed [in module %s]"),
11923 bfd_get_filename (abfd
));
11928 switch (cu_header
->addr_size
)
11931 retval
= bfd_get_16 (abfd
, buf
);
11934 retval
= bfd_get_32 (abfd
, buf
);
11937 retval
= bfd_get_64 (abfd
, buf
);
11940 internal_error (__FILE__
, __LINE__
,
11941 _("read_address: bad switch, "
11942 "unsigned [in module %s]"),
11943 bfd_get_filename (abfd
));
11947 *bytes_read
= cu_header
->addr_size
;
11951 /* Read the initial length from a section. The (draft) DWARF 3
11952 specification allows the initial length to take up either 4 bytes
11953 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
11954 bytes describe the length and all offsets will be 8 bytes in length
11957 An older, non-standard 64-bit format is also handled by this
11958 function. The older format in question stores the initial length
11959 as an 8-byte quantity without an escape value. Lengths greater
11960 than 2^32 aren't very common which means that the initial 4 bytes
11961 is almost always zero. Since a length value of zero doesn't make
11962 sense for the 32-bit format, this initial zero can be considered to
11963 be an escape value which indicates the presence of the older 64-bit
11964 format. As written, the code can't detect (old format) lengths
11965 greater than 4GB. If it becomes necessary to handle lengths
11966 somewhat larger than 4GB, we could allow other small values (such
11967 as the non-sensical values of 1, 2, and 3) to also be used as
11968 escape values indicating the presence of the old format.
11970 The value returned via bytes_read should be used to increment the
11971 relevant pointer after calling read_initial_length().
11973 [ Note: read_initial_length() and read_offset() are based on the
11974 document entitled "DWARF Debugging Information Format", revision
11975 3, draft 8, dated November 19, 2001. This document was obtained
11978 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
11980 This document is only a draft and is subject to change. (So beware.)
11982 Details regarding the older, non-standard 64-bit format were
11983 determined empirically by examining 64-bit ELF files produced by
11984 the SGI toolchain on an IRIX 6.5 machine.
11986 - Kevin, July 16, 2002
11990 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
11992 LONGEST length
= bfd_get_32 (abfd
, buf
);
11994 if (length
== 0xffffffff)
11996 length
= bfd_get_64 (abfd
, buf
+ 4);
11999 else if (length
== 0)
12001 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
12002 length
= bfd_get_64 (abfd
, buf
);
12013 /* Cover function for read_initial_length.
12014 Returns the length of the object at BUF, and stores the size of the
12015 initial length in *BYTES_READ and stores the size that offsets will be in
12017 If the initial length size is not equivalent to that specified in
12018 CU_HEADER then issue a complaint.
12019 This is useful when reading non-comp-unit headers. */
12022 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
12023 const struct comp_unit_head
*cu_header
,
12024 unsigned int *bytes_read
,
12025 unsigned int *offset_size
)
12027 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
12029 gdb_assert (cu_header
->initial_length_size
== 4
12030 || cu_header
->initial_length_size
== 8
12031 || cu_header
->initial_length_size
== 12);
12033 if (cu_header
->initial_length_size
!= *bytes_read
)
12034 complaint (&symfile_complaints
,
12035 _("intermixed 32-bit and 64-bit DWARF sections"));
12037 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
12041 /* Read an offset from the data stream. The size of the offset is
12042 given by cu_header->offset_size. */
12045 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
12046 unsigned int *bytes_read
)
12048 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
12050 *bytes_read
= cu_header
->offset_size
;
12054 /* Read an offset from the data stream. */
12057 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
12059 LONGEST retval
= 0;
12061 switch (offset_size
)
12064 retval
= bfd_get_32 (abfd
, buf
);
12067 retval
= bfd_get_64 (abfd
, buf
);
12070 internal_error (__FILE__
, __LINE__
,
12071 _("read_offset_1: bad switch [in module %s]"),
12072 bfd_get_filename (abfd
));
12079 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
12081 /* If the size of a host char is 8 bits, we can return a pointer
12082 to the buffer, otherwise we have to copy the data to a buffer
12083 allocated on the temporary obstack. */
12084 gdb_assert (HOST_CHAR_BIT
== 8);
12089 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12091 /* If the size of a host char is 8 bits, we can return a pointer
12092 to the string, otherwise we have to copy the string to a buffer
12093 allocated on the temporary obstack. */
12094 gdb_assert (HOST_CHAR_BIT
== 8);
12097 *bytes_read_ptr
= 1;
12100 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
12101 return (char *) buf
;
12105 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
12107 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
12108 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
12109 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
12110 bfd_get_filename (abfd
));
12111 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
12112 error (_("DW_FORM_strp pointing outside of "
12113 ".debug_str section [in module %s]"),
12114 bfd_get_filename (abfd
));
12115 gdb_assert (HOST_CHAR_BIT
== 8);
12116 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
12118 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
12122 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
12123 const struct comp_unit_head
*cu_header
,
12124 unsigned int *bytes_read_ptr
)
12126 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
12128 return read_indirect_string_at_offset (abfd
, str_offset
);
12132 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12135 unsigned int num_read
;
12137 unsigned char byte
;
12145 byte
= bfd_get_8 (abfd
, buf
);
12148 result
|= ((ULONGEST
) (byte
& 127) << shift
);
12149 if ((byte
& 128) == 0)
12155 *bytes_read_ptr
= num_read
;
12160 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12163 int i
, shift
, num_read
;
12164 unsigned char byte
;
12172 byte
= bfd_get_8 (abfd
, buf
);
12175 result
|= ((LONGEST
) (byte
& 127) << shift
);
12177 if ((byte
& 128) == 0)
12182 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
12183 result
|= -(((LONGEST
) 1) << shift
);
12184 *bytes_read_ptr
= num_read
;
12188 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
12189 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
12190 ADDR_SIZE is the size of addresses from the CU header. */
12193 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
12195 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12196 bfd
*abfd
= objfile
->obfd
;
12197 const gdb_byte
*info_ptr
;
12199 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
12200 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
12201 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
12203 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
12204 error (_("DW_FORM_addr_index pointing outside of "
12205 ".debug_addr section [in module %s]"),
12207 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
12208 + addr_base
+ addr_index
* addr_size
);
12209 if (addr_size
== 4)
12210 return bfd_get_32 (abfd
, info_ptr
);
12212 return bfd_get_64 (abfd
, info_ptr
);
12215 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
12218 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
12220 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
12223 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
12226 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
12227 unsigned int *bytes_read
)
12229 bfd
*abfd
= cu
->objfile
->obfd
;
12230 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
12232 return read_addr_index (cu
, addr_index
);
12235 /* Data structure to pass results from dwarf2_read_addr_index_reader
12236 back to dwarf2_read_addr_index. */
12238 struct dwarf2_read_addr_index_data
12240 ULONGEST addr_base
;
12244 /* die_reader_func for dwarf2_read_addr_index. */
12247 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
12248 gdb_byte
*info_ptr
,
12249 struct die_info
*comp_unit_die
,
12253 struct dwarf2_cu
*cu
= reader
->cu
;
12254 struct dwarf2_read_addr_index_data
*aidata
=
12255 (struct dwarf2_read_addr_index_data
*) data
;
12257 aidata
->addr_base
= cu
->addr_base
;
12258 aidata
->addr_size
= cu
->header
.addr_size
;
12261 /* Given an index in .debug_addr, fetch the value.
12262 NOTE: This can be called during dwarf expression evaluation,
12263 long after the debug information has been read, and thus per_cu->cu
12264 may no longer exist. */
12267 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
12268 unsigned int addr_index
)
12270 struct objfile
*objfile
= per_cu
->objfile
;
12271 struct dwarf2_cu
*cu
= per_cu
->cu
;
12272 ULONGEST addr_base
;
12275 /* This is intended to be called from outside this file. */
12276 dw2_setup (objfile
);
12278 /* We need addr_base and addr_size.
12279 If we don't have PER_CU->cu, we have to get it.
12280 Nasty, but the alternative is storing the needed info in PER_CU,
12281 which at this point doesn't seem justified: it's not clear how frequently
12282 it would get used and it would increase the size of every PER_CU.
12283 Entry points like dwarf2_per_cu_addr_size do a similar thing
12284 so we're not in uncharted territory here.
12285 Alas we need to be a bit more complicated as addr_base is contained
12288 We don't need to read the entire CU(/TU).
12289 We just need the header and top level die.
12290 IWBN to use the aging mechanism to let us lazily later discard the CU.
12291 See however init_cutu_and_read_dies_simple. */
12295 addr_base
= cu
->addr_base
;
12296 addr_size
= cu
->header
.addr_size
;
12300 struct dwarf2_read_addr_index_data aidata
;
12302 init_cutu_and_read_dies_simple (per_cu
, dwarf2_read_addr_index_reader
,
12304 addr_base
= aidata
.addr_base
;
12305 addr_size
= aidata
.addr_size
;
12308 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
12311 /* Given a DW_AT_str_index, fetch the string. */
12314 read_str_index (const struct die_reader_specs
*reader
,
12315 struct dwarf2_cu
*cu
, ULONGEST str_index
)
12317 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12318 const char *dwo_name
= objfile
->name
;
12319 bfd
*abfd
= objfile
->obfd
;
12320 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
12321 gdb_byte
*info_ptr
;
12322 ULONGEST str_offset
;
12324 dwarf2_read_section (objfile
, §ions
->str
);
12325 dwarf2_read_section (objfile
, §ions
->str_offsets
);
12326 if (sections
->str
.buffer
== NULL
)
12327 error (_("DW_FORM_str_index used without .debug_str.dwo section"
12328 " in CU at offset 0x%lx [in module %s]"),
12329 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12330 if (sections
->str_offsets
.buffer
== NULL
)
12331 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
12332 " in CU at offset 0x%lx [in module %s]"),
12333 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12334 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
12335 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
12336 " section in CU at offset 0x%lx [in module %s]"),
12337 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12338 info_ptr
= (sections
->str_offsets
.buffer
12339 + str_index
* cu
->header
.offset_size
);
12340 if (cu
->header
.offset_size
== 4)
12341 str_offset
= bfd_get_32 (abfd
, info_ptr
);
12343 str_offset
= bfd_get_64 (abfd
, info_ptr
);
12344 if (str_offset
>= sections
->str
.size
)
12345 error (_("Offset from DW_FORM_str_index pointing outside of"
12346 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
12347 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12348 return (char *) (sections
->str
.buffer
+ str_offset
);
12351 /* Return the length of an LEB128 number in BUF. */
12354 leb128_size (const gdb_byte
*buf
)
12356 const gdb_byte
*begin
= buf
;
12362 if ((byte
& 128) == 0)
12363 return buf
- begin
;
12368 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
12375 cu
->language
= language_c
;
12377 case DW_LANG_C_plus_plus
:
12378 cu
->language
= language_cplus
;
12381 cu
->language
= language_d
;
12383 case DW_LANG_Fortran77
:
12384 case DW_LANG_Fortran90
:
12385 case DW_LANG_Fortran95
:
12386 cu
->language
= language_fortran
;
12389 cu
->language
= language_go
;
12391 case DW_LANG_Mips_Assembler
:
12392 cu
->language
= language_asm
;
12395 cu
->language
= language_java
;
12397 case DW_LANG_Ada83
:
12398 case DW_LANG_Ada95
:
12399 cu
->language
= language_ada
;
12401 case DW_LANG_Modula2
:
12402 cu
->language
= language_m2
;
12404 case DW_LANG_Pascal83
:
12405 cu
->language
= language_pascal
;
12408 cu
->language
= language_objc
;
12410 case DW_LANG_Cobol74
:
12411 case DW_LANG_Cobol85
:
12413 cu
->language
= language_minimal
;
12416 cu
->language_defn
= language_def (cu
->language
);
12419 /* Return the named attribute or NULL if not there. */
12421 static struct attribute
*
12422 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
12427 struct attribute
*spec
= NULL
;
12429 for (i
= 0; i
< die
->num_attrs
; ++i
)
12431 if (die
->attrs
[i
].name
== name
)
12432 return &die
->attrs
[i
];
12433 if (die
->attrs
[i
].name
== DW_AT_specification
12434 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
12435 spec
= &die
->attrs
[i
];
12441 die
= follow_die_ref (die
, spec
, &cu
);
12447 /* Return the named attribute or NULL if not there,
12448 but do not follow DW_AT_specification, etc.
12449 This is for use in contexts where we're reading .debug_types dies.
12450 Following DW_AT_specification, DW_AT_abstract_origin will take us
12451 back up the chain, and we want to go down. */
12453 static struct attribute
*
12454 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
12455 struct dwarf2_cu
*cu
)
12459 for (i
= 0; i
< die
->num_attrs
; ++i
)
12460 if (die
->attrs
[i
].name
== name
)
12461 return &die
->attrs
[i
];
12466 /* Return non-zero iff the attribute NAME is defined for the given DIE,
12467 and holds a non-zero value. This function should only be used for
12468 DW_FORM_flag or DW_FORM_flag_present attributes. */
12471 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
12473 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
12475 return (attr
&& DW_UNSND (attr
));
12479 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
12481 /* A DIE is a declaration if it has a DW_AT_declaration attribute
12482 which value is non-zero. However, we have to be careful with
12483 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
12484 (via dwarf2_flag_true_p) follows this attribute. So we may
12485 end up accidently finding a declaration attribute that belongs
12486 to a different DIE referenced by the specification attribute,
12487 even though the given DIE does not have a declaration attribute. */
12488 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
12489 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
12492 /* Return the die giving the specification for DIE, if there is
12493 one. *SPEC_CU is the CU containing DIE on input, and the CU
12494 containing the return value on output. If there is no
12495 specification, but there is an abstract origin, that is
12498 static struct die_info
*
12499 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
12501 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
12504 if (spec_attr
== NULL
)
12505 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
12507 if (spec_attr
== NULL
)
12510 return follow_die_ref (die
, spec_attr
, spec_cu
);
12513 /* Free the line_header structure *LH, and any arrays and strings it
12515 NOTE: This is also used as a "cleanup" function. */
12518 free_line_header (struct line_header
*lh
)
12520 if (lh
->standard_opcode_lengths
)
12521 xfree (lh
->standard_opcode_lengths
);
12523 /* Remember that all the lh->file_names[i].name pointers are
12524 pointers into debug_line_buffer, and don't need to be freed. */
12525 if (lh
->file_names
)
12526 xfree (lh
->file_names
);
12528 /* Similarly for the include directory names. */
12529 if (lh
->include_dirs
)
12530 xfree (lh
->include_dirs
);
12535 /* Add an entry to LH's include directory table. */
12538 add_include_dir (struct line_header
*lh
, char *include_dir
)
12540 /* Grow the array if necessary. */
12541 if (lh
->include_dirs_size
== 0)
12543 lh
->include_dirs_size
= 1; /* for testing */
12544 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
12545 * sizeof (*lh
->include_dirs
));
12547 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
12549 lh
->include_dirs_size
*= 2;
12550 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
12551 (lh
->include_dirs_size
12552 * sizeof (*lh
->include_dirs
)));
12555 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
12558 /* Add an entry to LH's file name table. */
12561 add_file_name (struct line_header
*lh
,
12563 unsigned int dir_index
,
12564 unsigned int mod_time
,
12565 unsigned int length
)
12567 struct file_entry
*fe
;
12569 /* Grow the array if necessary. */
12570 if (lh
->file_names_size
== 0)
12572 lh
->file_names_size
= 1; /* for testing */
12573 lh
->file_names
= xmalloc (lh
->file_names_size
12574 * sizeof (*lh
->file_names
));
12576 else if (lh
->num_file_names
>= lh
->file_names_size
)
12578 lh
->file_names_size
*= 2;
12579 lh
->file_names
= xrealloc (lh
->file_names
,
12580 (lh
->file_names_size
12581 * sizeof (*lh
->file_names
)));
12584 fe
= &lh
->file_names
[lh
->num_file_names
++];
12586 fe
->dir_index
= dir_index
;
12587 fe
->mod_time
= mod_time
;
12588 fe
->length
= length
;
12589 fe
->included_p
= 0;
12593 /* Read the statement program header starting at OFFSET in
12594 .debug_line, or .debug_line.dwo. Return a pointer
12595 to a struct line_header, allocated using xmalloc.
12597 NOTE: the strings in the include directory and file name tables of
12598 the returned object point into the dwarf line section buffer,
12599 and must not be freed. */
12601 static struct line_header
*
12602 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
12604 struct cleanup
*back_to
;
12605 struct line_header
*lh
;
12606 gdb_byte
*line_ptr
;
12607 unsigned int bytes_read
, offset_size
;
12609 char *cur_dir
, *cur_file
;
12610 struct dwarf2_section_info
*section
;
12613 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
12615 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
12616 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
12618 section
= &dwarf2_per_objfile
->line
;
12620 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
12621 if (section
->buffer
== NULL
)
12623 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
12624 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
12626 complaint (&symfile_complaints
, _("missing .debug_line section"));
12630 /* We can't do this until we know the section is non-empty.
12631 Only then do we know we have such a section. */
12632 abfd
= section
->asection
->owner
;
12634 /* Make sure that at least there's room for the total_length field.
12635 That could be 12 bytes long, but we're just going to fudge that. */
12636 if (offset
+ 4 >= section
->size
)
12638 dwarf2_statement_list_fits_in_line_number_section_complaint ();
12642 lh
= xmalloc (sizeof (*lh
));
12643 memset (lh
, 0, sizeof (*lh
));
12644 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
12647 line_ptr
= section
->buffer
+ offset
;
12649 /* Read in the header. */
12651 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
12652 &bytes_read
, &offset_size
);
12653 line_ptr
+= bytes_read
;
12654 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
12656 dwarf2_statement_list_fits_in_line_number_section_complaint ();
12659 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
12660 lh
->version
= read_2_bytes (abfd
, line_ptr
);
12662 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
12663 line_ptr
+= offset_size
;
12664 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
12666 if (lh
->version
>= 4)
12668 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
12672 lh
->maximum_ops_per_instruction
= 1;
12674 if (lh
->maximum_ops_per_instruction
== 0)
12676 lh
->maximum_ops_per_instruction
= 1;
12677 complaint (&symfile_complaints
,
12678 _("invalid maximum_ops_per_instruction "
12679 "in `.debug_line' section"));
12682 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
12684 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
12686 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
12688 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
12690 lh
->standard_opcode_lengths
12691 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
12693 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
12694 for (i
= 1; i
< lh
->opcode_base
; ++i
)
12696 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
12700 /* Read directory table. */
12701 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
12703 line_ptr
+= bytes_read
;
12704 add_include_dir (lh
, cur_dir
);
12706 line_ptr
+= bytes_read
;
12708 /* Read file name table. */
12709 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
12711 unsigned int dir_index
, mod_time
, length
;
12713 line_ptr
+= bytes_read
;
12714 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12715 line_ptr
+= bytes_read
;
12716 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12717 line_ptr
+= bytes_read
;
12718 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12719 line_ptr
+= bytes_read
;
12721 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
12723 line_ptr
+= bytes_read
;
12724 lh
->statement_program_start
= line_ptr
;
12726 if (line_ptr
> (section
->buffer
+ section
->size
))
12727 complaint (&symfile_complaints
,
12728 _("line number info header doesn't "
12729 "fit in `.debug_line' section"));
12731 discard_cleanups (back_to
);
12735 /* Subroutine of dwarf_decode_lines to simplify it.
12736 Return the file name of the psymtab for included file FILE_INDEX
12737 in line header LH of PST.
12738 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
12739 If space for the result is malloc'd, it will be freed by a cleanup.
12740 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
12743 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
12744 const struct partial_symtab
*pst
,
12745 const char *comp_dir
)
12747 const struct file_entry fe
= lh
->file_names
[file_index
];
12748 char *include_name
= fe
.name
;
12749 char *include_name_to_compare
= include_name
;
12750 char *dir_name
= NULL
;
12751 const char *pst_filename
;
12752 char *copied_name
= NULL
;
12756 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
12758 if (!IS_ABSOLUTE_PATH (include_name
)
12759 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
12761 /* Avoid creating a duplicate psymtab for PST.
12762 We do this by comparing INCLUDE_NAME and PST_FILENAME.
12763 Before we do the comparison, however, we need to account
12764 for DIR_NAME and COMP_DIR.
12765 First prepend dir_name (if non-NULL). If we still don't
12766 have an absolute path prepend comp_dir (if non-NULL).
12767 However, the directory we record in the include-file's
12768 psymtab does not contain COMP_DIR (to match the
12769 corresponding symtab(s)).
12774 bash$ gcc -g ./hello.c
12775 include_name = "hello.c"
12777 DW_AT_comp_dir = comp_dir = "/tmp"
12778 DW_AT_name = "./hello.c" */
12780 if (dir_name
!= NULL
)
12782 include_name
= concat (dir_name
, SLASH_STRING
,
12783 include_name
, (char *)NULL
);
12784 include_name_to_compare
= include_name
;
12785 make_cleanup (xfree
, include_name
);
12787 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
12789 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
12790 include_name
, (char *)NULL
);
12794 pst_filename
= pst
->filename
;
12795 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
12797 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
12798 pst_filename
, (char *)NULL
);
12799 pst_filename
= copied_name
;
12802 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
12804 if (include_name_to_compare
!= include_name
)
12805 xfree (include_name_to_compare
);
12806 if (copied_name
!= NULL
)
12807 xfree (copied_name
);
12811 return include_name
;
12814 /* Ignore this record_line request. */
12817 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
12822 /* Subroutine of dwarf_decode_lines to simplify it.
12823 Process the line number information in LH. */
12826 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
12827 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
12829 gdb_byte
*line_ptr
, *extended_end
;
12830 gdb_byte
*line_end
;
12831 unsigned int bytes_read
, extended_len
;
12832 unsigned char op_code
, extended_op
, adj_opcode
;
12833 CORE_ADDR baseaddr
;
12834 struct objfile
*objfile
= cu
->objfile
;
12835 bfd
*abfd
= objfile
->obfd
;
12836 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12837 const int decode_for_pst_p
= (pst
!= NULL
);
12838 struct subfile
*last_subfile
= NULL
;
12839 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
12842 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12844 line_ptr
= lh
->statement_program_start
;
12845 line_end
= lh
->statement_program_end
;
12847 /* Read the statement sequences until there's nothing left. */
12848 while (line_ptr
< line_end
)
12850 /* state machine registers */
12851 CORE_ADDR address
= 0;
12852 unsigned int file
= 1;
12853 unsigned int line
= 1;
12854 unsigned int column
= 0;
12855 int is_stmt
= lh
->default_is_stmt
;
12856 int basic_block
= 0;
12857 int end_sequence
= 0;
12859 unsigned char op_index
= 0;
12861 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
12863 /* Start a subfile for the current file of the state machine. */
12864 /* lh->include_dirs and lh->file_names are 0-based, but the
12865 directory and file name numbers in the statement program
12867 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
12871 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
12873 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
12876 /* Decode the table. */
12877 while (!end_sequence
)
12879 op_code
= read_1_byte (abfd
, line_ptr
);
12881 if (line_ptr
> line_end
)
12883 dwarf2_debug_line_missing_end_sequence_complaint ();
12887 if (op_code
>= lh
->opcode_base
)
12889 /* Special operand. */
12890 adj_opcode
= op_code
- lh
->opcode_base
;
12891 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
12892 / lh
->maximum_ops_per_instruction
)
12893 * lh
->minimum_instruction_length
);
12894 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
12895 % lh
->maximum_ops_per_instruction
);
12896 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
12897 if (lh
->num_file_names
< file
|| file
== 0)
12898 dwarf2_debug_line_missing_file_complaint ();
12899 /* For now we ignore lines not starting on an
12900 instruction boundary. */
12901 else if (op_index
== 0)
12903 lh
->file_names
[file
- 1].included_p
= 1;
12904 if (!decode_for_pst_p
&& is_stmt
)
12906 if (last_subfile
!= current_subfile
)
12908 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
12910 (*p_record_line
) (last_subfile
, 0, addr
);
12911 last_subfile
= current_subfile
;
12913 /* Append row to matrix using current values. */
12914 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
12915 (*p_record_line
) (current_subfile
, line
, addr
);
12920 else switch (op_code
)
12922 case DW_LNS_extended_op
:
12923 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
12925 line_ptr
+= bytes_read
;
12926 extended_end
= line_ptr
+ extended_len
;
12927 extended_op
= read_1_byte (abfd
, line_ptr
);
12929 switch (extended_op
)
12931 case DW_LNE_end_sequence
:
12932 p_record_line
= record_line
;
12935 case DW_LNE_set_address
:
12936 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
12938 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12940 /* This line table is for a function which has been
12941 GCd by the linker. Ignore it. PR gdb/12528 */
12944 = line_ptr
- dwarf2_per_objfile
->line
.buffer
;
12946 complaint (&symfile_complaints
,
12947 _(".debug_line address at offset 0x%lx is 0 "
12949 line_offset
, objfile
->name
);
12950 p_record_line
= noop_record_line
;
12954 line_ptr
+= bytes_read
;
12955 address
+= baseaddr
;
12957 case DW_LNE_define_file
:
12960 unsigned int dir_index
, mod_time
, length
;
12962 cur_file
= read_direct_string (abfd
, line_ptr
,
12964 line_ptr
+= bytes_read
;
12966 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12967 line_ptr
+= bytes_read
;
12969 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12970 line_ptr
+= bytes_read
;
12972 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12973 line_ptr
+= bytes_read
;
12974 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
12977 case DW_LNE_set_discriminator
:
12978 /* The discriminator is not interesting to the debugger;
12980 line_ptr
= extended_end
;
12983 complaint (&symfile_complaints
,
12984 _("mangled .debug_line section"));
12987 /* Make sure that we parsed the extended op correctly. If e.g.
12988 we expected a different address size than the producer used,
12989 we may have read the wrong number of bytes. */
12990 if (line_ptr
!= extended_end
)
12992 complaint (&symfile_complaints
,
12993 _("mangled .debug_line section"));
12998 if (lh
->num_file_names
< file
|| file
== 0)
12999 dwarf2_debug_line_missing_file_complaint ();
13002 lh
->file_names
[file
- 1].included_p
= 1;
13003 if (!decode_for_pst_p
&& is_stmt
)
13005 if (last_subfile
!= current_subfile
)
13007 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13009 (*p_record_line
) (last_subfile
, 0, addr
);
13010 last_subfile
= current_subfile
;
13012 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13013 (*p_record_line
) (current_subfile
, line
, addr
);
13018 case DW_LNS_advance_pc
:
13021 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13023 address
+= (((op_index
+ adjust
)
13024 / lh
->maximum_ops_per_instruction
)
13025 * lh
->minimum_instruction_length
);
13026 op_index
= ((op_index
+ adjust
)
13027 % lh
->maximum_ops_per_instruction
);
13028 line_ptr
+= bytes_read
;
13031 case DW_LNS_advance_line
:
13032 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
13033 line_ptr
+= bytes_read
;
13035 case DW_LNS_set_file
:
13037 /* The arrays lh->include_dirs and lh->file_names are
13038 0-based, but the directory and file name numbers in
13039 the statement program are 1-based. */
13040 struct file_entry
*fe
;
13043 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13044 line_ptr
+= bytes_read
;
13045 if (lh
->num_file_names
< file
|| file
== 0)
13046 dwarf2_debug_line_missing_file_complaint ();
13049 fe
= &lh
->file_names
[file
- 1];
13051 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13052 if (!decode_for_pst_p
)
13054 last_subfile
= current_subfile
;
13055 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13060 case DW_LNS_set_column
:
13061 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13062 line_ptr
+= bytes_read
;
13064 case DW_LNS_negate_stmt
:
13065 is_stmt
= (!is_stmt
);
13067 case DW_LNS_set_basic_block
:
13070 /* Add to the address register of the state machine the
13071 address increment value corresponding to special opcode
13072 255. I.e., this value is scaled by the minimum
13073 instruction length since special opcode 255 would have
13074 scaled the increment. */
13075 case DW_LNS_const_add_pc
:
13077 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
13079 address
+= (((op_index
+ adjust
)
13080 / lh
->maximum_ops_per_instruction
)
13081 * lh
->minimum_instruction_length
);
13082 op_index
= ((op_index
+ adjust
)
13083 % lh
->maximum_ops_per_instruction
);
13086 case DW_LNS_fixed_advance_pc
:
13087 address
+= read_2_bytes (abfd
, line_ptr
);
13093 /* Unknown standard opcode, ignore it. */
13096 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
13098 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13099 line_ptr
+= bytes_read
;
13104 if (lh
->num_file_names
< file
|| file
== 0)
13105 dwarf2_debug_line_missing_file_complaint ();
13108 lh
->file_names
[file
- 1].included_p
= 1;
13109 if (!decode_for_pst_p
)
13111 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13112 (*p_record_line
) (current_subfile
, 0, addr
);
13118 /* Decode the Line Number Program (LNP) for the given line_header
13119 structure and CU. The actual information extracted and the type
13120 of structures created from the LNP depends on the value of PST.
13122 1. If PST is NULL, then this procedure uses the data from the program
13123 to create all necessary symbol tables, and their linetables.
13125 2. If PST is not NULL, this procedure reads the program to determine
13126 the list of files included by the unit represented by PST, and
13127 builds all the associated partial symbol tables.
13129 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
13130 It is used for relative paths in the line table.
13131 NOTE: When processing partial symtabs (pst != NULL),
13132 comp_dir == pst->dirname.
13134 NOTE: It is important that psymtabs have the same file name (via strcmp)
13135 as the corresponding symtab. Since COMP_DIR is not used in the name of the
13136 symtab we don't use it in the name of the psymtabs we create.
13137 E.g. expand_line_sal requires this when finding psymtabs to expand.
13138 A good testcase for this is mb-inline.exp. */
13141 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
13142 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
13143 int want_line_info
)
13145 struct objfile
*objfile
= cu
->objfile
;
13146 const int decode_for_pst_p
= (pst
!= NULL
);
13147 struct subfile
*first_subfile
= current_subfile
;
13149 if (want_line_info
)
13150 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
13152 if (decode_for_pst_p
)
13156 /* Now that we're done scanning the Line Header Program, we can
13157 create the psymtab of each included file. */
13158 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
13159 if (lh
->file_names
[file_index
].included_p
== 1)
13161 char *include_name
=
13162 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
13163 if (include_name
!= NULL
)
13164 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
13169 /* Make sure a symtab is created for every file, even files
13170 which contain only variables (i.e. no code with associated
13174 for (i
= 0; i
< lh
->num_file_names
; i
++)
13177 struct file_entry
*fe
;
13179 fe
= &lh
->file_names
[i
];
13181 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13182 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13184 /* Skip the main file; we don't need it, and it must be
13185 allocated last, so that it will show up before the
13186 non-primary symtabs in the objfile's symtab list. */
13187 if (current_subfile
== first_subfile
)
13190 if (current_subfile
->symtab
== NULL
)
13191 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
13193 fe
->symtab
= current_subfile
->symtab
;
13198 /* Start a subfile for DWARF. FILENAME is the name of the file and
13199 DIRNAME the name of the source directory which contains FILENAME
13200 or NULL if not known. COMP_DIR is the compilation directory for the
13201 linetable's compilation unit or NULL if not known.
13202 This routine tries to keep line numbers from identical absolute and
13203 relative file names in a common subfile.
13205 Using the `list' example from the GDB testsuite, which resides in
13206 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
13207 of /srcdir/list0.c yields the following debugging information for list0.c:
13209 DW_AT_name: /srcdir/list0.c
13210 DW_AT_comp_dir: /compdir
13211 files.files[0].name: list0.h
13212 files.files[0].dir: /srcdir
13213 files.files[1].name: list0.c
13214 files.files[1].dir: /srcdir
13216 The line number information for list0.c has to end up in a single
13217 subfile, so that `break /srcdir/list0.c:1' works as expected.
13218 start_subfile will ensure that this happens provided that we pass the
13219 concatenation of files.files[1].dir and files.files[1].name as the
13223 dwarf2_start_subfile (char *filename
, const char *dirname
,
13224 const char *comp_dir
)
13228 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
13229 `start_symtab' will always pass the contents of DW_AT_comp_dir as
13230 second argument to start_subfile. To be consistent, we do the
13231 same here. In order not to lose the line information directory,
13232 we concatenate it to the filename when it makes sense.
13233 Note that the Dwarf3 standard says (speaking of filenames in line
13234 information): ``The directory index is ignored for file names
13235 that represent full path names''. Thus ignoring dirname in the
13236 `else' branch below isn't an issue. */
13238 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
13239 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
13241 fullname
= filename
;
13243 start_subfile (fullname
, comp_dir
);
13245 if (fullname
!= filename
)
13250 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
13251 struct dwarf2_cu
*cu
)
13253 struct objfile
*objfile
= cu
->objfile
;
13254 struct comp_unit_head
*cu_header
= &cu
->header
;
13256 /* NOTE drow/2003-01-30: There used to be a comment and some special
13257 code here to turn a symbol with DW_AT_external and a
13258 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
13259 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
13260 with some versions of binutils) where shared libraries could have
13261 relocations against symbols in their debug information - the
13262 minimal symbol would have the right address, but the debug info
13263 would not. It's no longer necessary, because we will explicitly
13264 apply relocations when we read in the debug information now. */
13266 /* A DW_AT_location attribute with no contents indicates that a
13267 variable has been optimized away. */
13268 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
13270 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
13274 /* Handle one degenerate form of location expression specially, to
13275 preserve GDB's previous behavior when section offsets are
13276 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
13277 then mark this symbol as LOC_STATIC. */
13279 if (attr_form_is_block (attr
)
13280 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
13281 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
13282 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
13283 && (DW_BLOCK (attr
)->size
13284 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
13286 unsigned int dummy
;
13288 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
13289 SYMBOL_VALUE_ADDRESS (sym
) =
13290 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
13292 SYMBOL_VALUE_ADDRESS (sym
) =
13293 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
13294 SYMBOL_CLASS (sym
) = LOC_STATIC
;
13295 fixup_symbol_section (sym
, objfile
);
13296 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
13297 SYMBOL_SECTION (sym
));
13301 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
13302 expression evaluator, and use LOC_COMPUTED only when necessary
13303 (i.e. when the value of a register or memory location is
13304 referenced, or a thread-local block, etc.). Then again, it might
13305 not be worthwhile. I'm assuming that it isn't unless performance
13306 or memory numbers show me otherwise. */
13308 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
13309 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
13311 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
13312 cu
->has_loclist
= 1;
13315 /* Given a pointer to a DWARF information entry, figure out if we need
13316 to make a symbol table entry for it, and if so, create a new entry
13317 and return a pointer to it.
13318 If TYPE is NULL, determine symbol type from the die, otherwise
13319 used the passed type.
13320 If SPACE is not NULL, use it to hold the new symbol. If it is
13321 NULL, allocate a new symbol on the objfile's obstack. */
13323 static struct symbol
*
13324 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
13325 struct symbol
*space
)
13327 struct objfile
*objfile
= cu
->objfile
;
13328 struct symbol
*sym
= NULL
;
13330 struct attribute
*attr
= NULL
;
13331 struct attribute
*attr2
= NULL
;
13332 CORE_ADDR baseaddr
;
13333 struct pending
**list_to_add
= NULL
;
13335 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13337 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13339 name
= dwarf2_name (die
, cu
);
13342 const char *linkagename
;
13343 int suppress_add
= 0;
13348 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
13349 OBJSTAT (objfile
, n_syms
++);
13351 /* Cache this symbol's name and the name's demangled form (if any). */
13352 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
13353 linkagename
= dwarf2_physname (name
, die
, cu
);
13354 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
13356 /* Fortran does not have mangling standard and the mangling does differ
13357 between gfortran, iFort etc. */
13358 if (cu
->language
== language_fortran
13359 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
13360 symbol_set_demangled_name (&(sym
->ginfo
),
13361 (char *) dwarf2_full_name (name
, die
, cu
),
13364 /* Default assumptions.
13365 Use the passed type or decode it from the die. */
13366 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13367 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
13369 SYMBOL_TYPE (sym
) = type
;
13371 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
13372 attr
= dwarf2_attr (die
,
13373 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
13377 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
13380 attr
= dwarf2_attr (die
,
13381 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
13385 int file_index
= DW_UNSND (attr
);
13387 if (cu
->line_header
== NULL
13388 || file_index
> cu
->line_header
->num_file_names
)
13389 complaint (&symfile_complaints
,
13390 _("file index out of range"));
13391 else if (file_index
> 0)
13393 struct file_entry
*fe
;
13395 fe
= &cu
->line_header
->file_names
[file_index
- 1];
13396 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
13403 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13406 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
13408 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
13409 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
13410 SYMBOL_CLASS (sym
) = LOC_LABEL
;
13411 add_symbol_to_list (sym
, cu
->list_in_scope
);
13413 case DW_TAG_subprogram
:
13414 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
13416 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
13417 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13418 if ((attr2
&& (DW_UNSND (attr2
) != 0))
13419 || cu
->language
== language_ada
)
13421 /* Subprograms marked external are stored as a global symbol.
13422 Ada subprograms, whether marked external or not, are always
13423 stored as a global symbol, because we want to be able to
13424 access them globally. For instance, we want to be able
13425 to break on a nested subprogram without having to
13426 specify the context. */
13427 list_to_add
= &global_symbols
;
13431 list_to_add
= cu
->list_in_scope
;
13434 case DW_TAG_inlined_subroutine
:
13435 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
13437 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
13438 SYMBOL_INLINED (sym
) = 1;
13439 list_to_add
= cu
->list_in_scope
;
13441 case DW_TAG_template_value_param
:
13443 /* Fall through. */
13444 case DW_TAG_constant
:
13445 case DW_TAG_variable
:
13446 case DW_TAG_member
:
13447 /* Compilation with minimal debug info may result in
13448 variables with missing type entries. Change the
13449 misleading `void' type to something sensible. */
13450 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
13452 = objfile_type (objfile
)->nodebug_data_symbol
;
13454 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13455 /* In the case of DW_TAG_member, we should only be called for
13456 static const members. */
13457 if (die
->tag
== DW_TAG_member
)
13459 /* dwarf2_add_field uses die_is_declaration,
13460 so we do the same. */
13461 gdb_assert (die_is_declaration (die
, cu
));
13466 dwarf2_const_value (attr
, sym
, cu
);
13467 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13470 if (attr2
&& (DW_UNSND (attr2
) != 0))
13471 list_to_add
= &global_symbols
;
13473 list_to_add
= cu
->list_in_scope
;
13477 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13480 var_decode_location (attr
, sym
, cu
);
13481 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13482 if (SYMBOL_CLASS (sym
) == LOC_STATIC
13483 && SYMBOL_VALUE_ADDRESS (sym
) == 0
13484 && !dwarf2_per_objfile
->has_section_at_zero
)
13486 /* When a static variable is eliminated by the linker,
13487 the corresponding debug information is not stripped
13488 out, but the variable address is set to null;
13489 do not add such variables into symbol table. */
13491 else if (attr2
&& (DW_UNSND (attr2
) != 0))
13493 /* Workaround gfortran PR debug/40040 - it uses
13494 DW_AT_location for variables in -fPIC libraries which may
13495 get overriden by other libraries/executable and get
13496 a different address. Resolve it by the minimal symbol
13497 which may come from inferior's executable using copy
13498 relocation. Make this workaround only for gfortran as for
13499 other compilers GDB cannot guess the minimal symbol
13500 Fortran mangling kind. */
13501 if (cu
->language
== language_fortran
&& die
->parent
13502 && die
->parent
->tag
== DW_TAG_module
13504 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
13505 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
13507 /* A variable with DW_AT_external is never static,
13508 but it may be block-scoped. */
13509 list_to_add
= (cu
->list_in_scope
== &file_symbols
13510 ? &global_symbols
: cu
->list_in_scope
);
13513 list_to_add
= cu
->list_in_scope
;
13517 /* We do not know the address of this symbol.
13518 If it is an external symbol and we have type information
13519 for it, enter the symbol as a LOC_UNRESOLVED symbol.
13520 The address of the variable will then be determined from
13521 the minimal symbol table whenever the variable is
13523 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13524 if (attr2
&& (DW_UNSND (attr2
) != 0)
13525 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
13527 /* A variable with DW_AT_external is never static, but it
13528 may be block-scoped. */
13529 list_to_add
= (cu
->list_in_scope
== &file_symbols
13530 ? &global_symbols
: cu
->list_in_scope
);
13532 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
13534 else if (!die_is_declaration (die
, cu
))
13536 /* Use the default LOC_OPTIMIZED_OUT class. */
13537 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
13539 list_to_add
= cu
->list_in_scope
;
13543 case DW_TAG_formal_parameter
:
13544 /* If we are inside a function, mark this as an argument. If
13545 not, we might be looking at an argument to an inlined function
13546 when we do not have enough information to show inlined frames;
13547 pretend it's a local variable in that case so that the user can
13549 if (context_stack_depth
> 0
13550 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
13551 SYMBOL_IS_ARGUMENT (sym
) = 1;
13552 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13555 var_decode_location (attr
, sym
, cu
);
13557 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13560 dwarf2_const_value (attr
, sym
, cu
);
13563 list_to_add
= cu
->list_in_scope
;
13565 case DW_TAG_unspecified_parameters
:
13566 /* From varargs functions; gdb doesn't seem to have any
13567 interest in this information, so just ignore it for now.
13570 case DW_TAG_template_type_param
:
13572 /* Fall through. */
13573 case DW_TAG_class_type
:
13574 case DW_TAG_interface_type
:
13575 case DW_TAG_structure_type
:
13576 case DW_TAG_union_type
:
13577 case DW_TAG_set_type
:
13578 case DW_TAG_enumeration_type
:
13579 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13580 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
13583 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
13584 really ever be static objects: otherwise, if you try
13585 to, say, break of a class's method and you're in a file
13586 which doesn't mention that class, it won't work unless
13587 the check for all static symbols in lookup_symbol_aux
13588 saves you. See the OtherFileClass tests in
13589 gdb.c++/namespace.exp. */
13593 list_to_add
= (cu
->list_in_scope
== &file_symbols
13594 && (cu
->language
== language_cplus
13595 || cu
->language
== language_java
)
13596 ? &global_symbols
: cu
->list_in_scope
);
13598 /* The semantics of C++ state that "struct foo {
13599 ... }" also defines a typedef for "foo". A Java
13600 class declaration also defines a typedef for the
13602 if (cu
->language
== language_cplus
13603 || cu
->language
== language_java
13604 || cu
->language
== language_ada
)
13606 /* The symbol's name is already allocated along
13607 with this objfile, so we don't need to
13608 duplicate it for the type. */
13609 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
13610 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
13615 case DW_TAG_typedef
:
13616 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13617 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13618 list_to_add
= cu
->list_in_scope
;
13620 case DW_TAG_base_type
:
13621 case DW_TAG_subrange_type
:
13622 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13623 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13624 list_to_add
= cu
->list_in_scope
;
13626 case DW_TAG_enumerator
:
13627 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13630 dwarf2_const_value (attr
, sym
, cu
);
13633 /* NOTE: carlton/2003-11-10: See comment above in the
13634 DW_TAG_class_type, etc. block. */
13636 list_to_add
= (cu
->list_in_scope
== &file_symbols
13637 && (cu
->language
== language_cplus
13638 || cu
->language
== language_java
)
13639 ? &global_symbols
: cu
->list_in_scope
);
13642 case DW_TAG_namespace
:
13643 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13644 list_to_add
= &global_symbols
;
13647 /* Not a tag we recognize. Hopefully we aren't processing
13648 trash data, but since we must specifically ignore things
13649 we don't recognize, there is nothing else we should do at
13651 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
13652 dwarf_tag_name (die
->tag
));
13658 sym
->hash_next
= objfile
->template_symbols
;
13659 objfile
->template_symbols
= sym
;
13660 list_to_add
= NULL
;
13663 if (list_to_add
!= NULL
)
13664 add_symbol_to_list (sym
, list_to_add
);
13666 /* For the benefit of old versions of GCC, check for anonymous
13667 namespaces based on the demangled name. */
13668 if (!processing_has_namespace_info
13669 && cu
->language
== language_cplus
)
13670 cp_scan_for_anonymous_namespaces (sym
, objfile
);
13675 /* A wrapper for new_symbol_full that always allocates a new symbol. */
13677 static struct symbol
*
13678 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
13680 return new_symbol_full (die
, type
, cu
, NULL
);
13683 /* Given an attr with a DW_FORM_dataN value in host byte order,
13684 zero-extend it as appropriate for the symbol's type. The DWARF
13685 standard (v4) is not entirely clear about the meaning of using
13686 DW_FORM_dataN for a constant with a signed type, where the type is
13687 wider than the data. The conclusion of a discussion on the DWARF
13688 list was that this is unspecified. We choose to always zero-extend
13689 because that is the interpretation long in use by GCC. */
13692 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
13693 const char *name
, struct obstack
*obstack
,
13694 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
13696 struct objfile
*objfile
= cu
->objfile
;
13697 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
13698 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
13699 LONGEST l
= DW_UNSND (attr
);
13701 if (bits
< sizeof (*value
) * 8)
13703 l
&= ((LONGEST
) 1 << bits
) - 1;
13706 else if (bits
== sizeof (*value
) * 8)
13710 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
13711 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
13718 /* Read a constant value from an attribute. Either set *VALUE, or if
13719 the value does not fit in *VALUE, set *BYTES - either already
13720 allocated on the objfile obstack, or newly allocated on OBSTACK,
13721 or, set *BATON, if we translated the constant to a location
13725 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
13726 const char *name
, struct obstack
*obstack
,
13727 struct dwarf2_cu
*cu
,
13728 LONGEST
*value
, gdb_byte
**bytes
,
13729 struct dwarf2_locexpr_baton
**baton
)
13731 struct objfile
*objfile
= cu
->objfile
;
13732 struct comp_unit_head
*cu_header
= &cu
->header
;
13733 struct dwarf_block
*blk
;
13734 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
13735 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
13741 switch (attr
->form
)
13744 case DW_FORM_GNU_addr_index
:
13748 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
13749 dwarf2_const_value_length_mismatch_complaint (name
,
13750 cu_header
->addr_size
,
13751 TYPE_LENGTH (type
));
13752 /* Symbols of this form are reasonably rare, so we just
13753 piggyback on the existing location code rather than writing
13754 a new implementation of symbol_computed_ops. */
13755 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
13756 sizeof (struct dwarf2_locexpr_baton
));
13757 (*baton
)->per_cu
= cu
->per_cu
;
13758 gdb_assert ((*baton
)->per_cu
);
13760 (*baton
)->size
= 2 + cu_header
->addr_size
;
13761 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
13762 (*baton
)->data
= data
;
13764 data
[0] = DW_OP_addr
;
13765 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
13766 byte_order
, DW_ADDR (attr
));
13767 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
13770 case DW_FORM_string
:
13772 case DW_FORM_GNU_str_index
:
13773 /* DW_STRING is already allocated on the objfile obstack, point
13775 *bytes
= (gdb_byte
*) DW_STRING (attr
);
13777 case DW_FORM_block1
:
13778 case DW_FORM_block2
:
13779 case DW_FORM_block4
:
13780 case DW_FORM_block
:
13781 case DW_FORM_exprloc
:
13782 blk
= DW_BLOCK (attr
);
13783 if (TYPE_LENGTH (type
) != blk
->size
)
13784 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
13785 TYPE_LENGTH (type
));
13786 *bytes
= blk
->data
;
13789 /* The DW_AT_const_value attributes are supposed to carry the
13790 symbol's value "represented as it would be on the target
13791 architecture." By the time we get here, it's already been
13792 converted to host endianness, so we just need to sign- or
13793 zero-extend it as appropriate. */
13794 case DW_FORM_data1
:
13795 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13796 obstack
, cu
, value
, 8);
13798 case DW_FORM_data2
:
13799 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13800 obstack
, cu
, value
, 16);
13802 case DW_FORM_data4
:
13803 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13804 obstack
, cu
, value
, 32);
13806 case DW_FORM_data8
:
13807 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13808 obstack
, cu
, value
, 64);
13811 case DW_FORM_sdata
:
13812 *value
= DW_SND (attr
);
13815 case DW_FORM_udata
:
13816 *value
= DW_UNSND (attr
);
13820 complaint (&symfile_complaints
,
13821 _("unsupported const value attribute form: '%s'"),
13822 dwarf_form_name (attr
->form
));
13829 /* Copy constant value from an attribute to a symbol. */
13832 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
13833 struct dwarf2_cu
*cu
)
13835 struct objfile
*objfile
= cu
->objfile
;
13836 struct comp_unit_head
*cu_header
= &cu
->header
;
13839 struct dwarf2_locexpr_baton
*baton
;
13841 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
13842 SYMBOL_PRINT_NAME (sym
),
13843 &objfile
->objfile_obstack
, cu
,
13844 &value
, &bytes
, &baton
);
13848 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
13849 SYMBOL_LOCATION_BATON (sym
) = baton
;
13850 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
13852 else if (bytes
!= NULL
)
13854 SYMBOL_VALUE_BYTES (sym
) = bytes
;
13855 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
13859 SYMBOL_VALUE (sym
) = value
;
13860 SYMBOL_CLASS (sym
) = LOC_CONST
;
13864 /* Return the type of the die in question using its DW_AT_type attribute. */
13866 static struct type
*
13867 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13869 struct attribute
*type_attr
;
13871 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13874 /* A missing DW_AT_type represents a void type. */
13875 return objfile_type (cu
->objfile
)->builtin_void
;
13878 return lookup_die_type (die
, type_attr
, cu
);
13881 /* True iff CU's producer generates GNAT Ada auxiliary information
13882 that allows to find parallel types through that information instead
13883 of having to do expensive parallel lookups by type name. */
13886 need_gnat_info (struct dwarf2_cu
*cu
)
13888 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
13889 of GNAT produces this auxiliary information, without any indication
13890 that it is produced. Part of enhancing the FSF version of GNAT
13891 to produce that information will be to put in place an indicator
13892 that we can use in order to determine whether the descriptive type
13893 info is available or not. One suggestion that has been made is
13894 to use a new attribute, attached to the CU die. For now, assume
13895 that the descriptive type info is not available. */
13899 /* Return the auxiliary type of the die in question using its
13900 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
13901 attribute is not present. */
13903 static struct type
*
13904 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13906 struct attribute
*type_attr
;
13908 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
13912 return lookup_die_type (die
, type_attr
, cu
);
13915 /* If DIE has a descriptive_type attribute, then set the TYPE's
13916 descriptive type accordingly. */
13919 set_descriptive_type (struct type
*type
, struct die_info
*die
,
13920 struct dwarf2_cu
*cu
)
13922 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
13924 if (descriptive_type
)
13926 ALLOCATE_GNAT_AUX_TYPE (type
);
13927 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
13931 /* Return the containing type of the die in question using its
13932 DW_AT_containing_type attribute. */
13934 static struct type
*
13935 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13937 struct attribute
*type_attr
;
13939 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
13941 error (_("Dwarf Error: Problem turning containing type into gdb type "
13942 "[in module %s]"), cu
->objfile
->name
);
13944 return lookup_die_type (die
, type_attr
, cu
);
13947 /* Look up the type of DIE in CU using its type attribute ATTR.
13948 If there is no type substitute an error marker. */
13950 static struct type
*
13951 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
13952 struct dwarf2_cu
*cu
)
13954 struct objfile
*objfile
= cu
->objfile
;
13955 struct type
*this_type
;
13957 /* First see if we have it cached. */
13959 if (is_ref_attr (attr
))
13961 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
13963 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
13965 else if (attr
->form
== DW_FORM_ref_sig8
)
13967 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
13969 /* sig_type will be NULL if the signatured type is missing from
13971 if (sig_type
== NULL
)
13972 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13973 "at 0x%x [in module %s]"),
13974 die
->offset
.sect_off
, objfile
->name
);
13976 gdb_assert (sig_type
->per_cu
.is_debug_types
);
13977 /* If we haven't filled in type_offset_in_section yet, then we
13978 haven't read the type in yet. */
13980 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
13983 get_die_type_at_offset (sig_type
->type_offset_in_section
,
13984 &sig_type
->per_cu
);
13989 dump_die_for_error (die
);
13990 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
13991 dwarf_attr_name (attr
->name
), objfile
->name
);
13994 /* If not cached we need to read it in. */
13996 if (this_type
== NULL
)
13998 struct die_info
*type_die
;
13999 struct dwarf2_cu
*type_cu
= cu
;
14001 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
14002 /* If we found the type now, it's probably because the type came
14003 from an inter-CU reference and the type's CU got expanded before
14005 this_type
= get_die_type (type_die
, type_cu
);
14006 if (this_type
== NULL
)
14007 this_type
= read_type_die_1 (type_die
, type_cu
);
14010 /* If we still don't have a type use an error marker. */
14012 if (this_type
== NULL
)
14014 char *message
, *saved
;
14016 /* read_type_die already issued a complaint. */
14017 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
14019 cu
->header
.offset
.sect_off
,
14020 die
->offset
.sect_off
);
14021 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
14022 message
, strlen (message
));
14025 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
14031 /* Return the type in DIE, CU.
14032 Returns NULL for invalid types.
14034 This first does a lookup in the appropriate type_hash table,
14035 and only reads the die in if necessary.
14037 NOTE: This can be called when reading in partial or full symbols. */
14039 static struct type
*
14040 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
14042 struct type
*this_type
;
14044 this_type
= get_die_type (die
, cu
);
14048 return read_type_die_1 (die
, cu
);
14051 /* Read the type in DIE, CU.
14052 Returns NULL for invalid types. */
14054 static struct type
*
14055 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
14057 struct type
*this_type
= NULL
;
14061 case DW_TAG_class_type
:
14062 case DW_TAG_interface_type
:
14063 case DW_TAG_structure_type
:
14064 case DW_TAG_union_type
:
14065 this_type
= read_structure_type (die
, cu
);
14067 case DW_TAG_enumeration_type
:
14068 this_type
= read_enumeration_type (die
, cu
);
14070 case DW_TAG_subprogram
:
14071 case DW_TAG_subroutine_type
:
14072 case DW_TAG_inlined_subroutine
:
14073 this_type
= read_subroutine_type (die
, cu
);
14075 case DW_TAG_array_type
:
14076 this_type
= read_array_type (die
, cu
);
14078 case DW_TAG_set_type
:
14079 this_type
= read_set_type (die
, cu
);
14081 case DW_TAG_pointer_type
:
14082 this_type
= read_tag_pointer_type (die
, cu
);
14084 case DW_TAG_ptr_to_member_type
:
14085 this_type
= read_tag_ptr_to_member_type (die
, cu
);
14087 case DW_TAG_reference_type
:
14088 this_type
= read_tag_reference_type (die
, cu
);
14090 case DW_TAG_const_type
:
14091 this_type
= read_tag_const_type (die
, cu
);
14093 case DW_TAG_volatile_type
:
14094 this_type
= read_tag_volatile_type (die
, cu
);
14096 case DW_TAG_string_type
:
14097 this_type
= read_tag_string_type (die
, cu
);
14099 case DW_TAG_typedef
:
14100 this_type
= read_typedef (die
, cu
);
14102 case DW_TAG_subrange_type
:
14103 this_type
= read_subrange_type (die
, cu
);
14105 case DW_TAG_base_type
:
14106 this_type
= read_base_type (die
, cu
);
14108 case DW_TAG_unspecified_type
:
14109 this_type
= read_unspecified_type (die
, cu
);
14111 case DW_TAG_namespace
:
14112 this_type
= read_namespace_type (die
, cu
);
14114 case DW_TAG_module
:
14115 this_type
= read_module_type (die
, cu
);
14118 complaint (&symfile_complaints
,
14119 _("unexpected tag in read_type_die: '%s'"),
14120 dwarf_tag_name (die
->tag
));
14127 /* See if we can figure out if the class lives in a namespace. We do
14128 this by looking for a member function; its demangled name will
14129 contain namespace info, if there is any.
14130 Return the computed name or NULL.
14131 Space for the result is allocated on the objfile's obstack.
14132 This is the full-die version of guess_partial_die_structure_name.
14133 In this case we know DIE has no useful parent. */
14136 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
14138 struct die_info
*spec_die
;
14139 struct dwarf2_cu
*spec_cu
;
14140 struct die_info
*child
;
14143 spec_die
= die_specification (die
, &spec_cu
);
14144 if (spec_die
!= NULL
)
14150 for (child
= die
->child
;
14152 child
= child
->sibling
)
14154 if (child
->tag
== DW_TAG_subprogram
)
14156 struct attribute
*attr
;
14158 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
14160 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
14164 = language_class_name_from_physname (cu
->language_defn
,
14168 if (actual_name
!= NULL
)
14170 char *die_name
= dwarf2_name (die
, cu
);
14172 if (die_name
!= NULL
14173 && strcmp (die_name
, actual_name
) != 0)
14175 /* Strip off the class name from the full name.
14176 We want the prefix. */
14177 int die_name_len
= strlen (die_name
);
14178 int actual_name_len
= strlen (actual_name
);
14180 /* Test for '::' as a sanity check. */
14181 if (actual_name_len
> die_name_len
+ 2
14182 && actual_name
[actual_name_len
14183 - die_name_len
- 1] == ':')
14185 obsavestring (actual_name
,
14186 actual_name_len
- die_name_len
- 2,
14187 &cu
->objfile
->objfile_obstack
);
14190 xfree (actual_name
);
14199 /* GCC might emit a nameless typedef that has a linkage name. Determine the
14200 prefix part in such case. See
14201 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14204 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
14206 struct attribute
*attr
;
14209 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
14210 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
14213 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14214 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
14217 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
14219 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
14220 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
14223 /* dwarf2_name had to be already called. */
14224 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
14226 /* Strip the base name, keep any leading namespaces/classes. */
14227 base
= strrchr (DW_STRING (attr
), ':');
14228 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
14231 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
14232 &cu
->objfile
->objfile_obstack
);
14235 /* Return the name of the namespace/class that DIE is defined within,
14236 or "" if we can't tell. The caller should not xfree the result.
14238 For example, if we're within the method foo() in the following
14248 then determine_prefix on foo's die will return "N::C". */
14250 static const char *
14251 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
14253 struct die_info
*parent
, *spec_die
;
14254 struct dwarf2_cu
*spec_cu
;
14255 struct type
*parent_type
;
14258 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
14259 && cu
->language
!= language_fortran
)
14262 retval
= anonymous_struct_prefix (die
, cu
);
14266 /* We have to be careful in the presence of DW_AT_specification.
14267 For example, with GCC 3.4, given the code
14271 // Definition of N::foo.
14275 then we'll have a tree of DIEs like this:
14277 1: DW_TAG_compile_unit
14278 2: DW_TAG_namespace // N
14279 3: DW_TAG_subprogram // declaration of N::foo
14280 4: DW_TAG_subprogram // definition of N::foo
14281 DW_AT_specification // refers to die #3
14283 Thus, when processing die #4, we have to pretend that we're in
14284 the context of its DW_AT_specification, namely the contex of die
14287 spec_die
= die_specification (die
, &spec_cu
);
14288 if (spec_die
== NULL
)
14289 parent
= die
->parent
;
14292 parent
= spec_die
->parent
;
14296 if (parent
== NULL
)
14298 else if (parent
->building_fullname
)
14301 const char *parent_name
;
14303 /* It has been seen on RealView 2.2 built binaries,
14304 DW_TAG_template_type_param types actually _defined_ as
14305 children of the parent class:
14308 template class <class Enum> Class{};
14309 Class<enum E> class_e;
14311 1: DW_TAG_class_type (Class)
14312 2: DW_TAG_enumeration_type (E)
14313 3: DW_TAG_enumerator (enum1:0)
14314 3: DW_TAG_enumerator (enum2:1)
14316 2: DW_TAG_template_type_param
14317 DW_AT_type DW_FORM_ref_udata (E)
14319 Besides being broken debug info, it can put GDB into an
14320 infinite loop. Consider:
14322 When we're building the full name for Class<E>, we'll start
14323 at Class, and go look over its template type parameters,
14324 finding E. We'll then try to build the full name of E, and
14325 reach here. We're now trying to build the full name of E,
14326 and look over the parent DIE for containing scope. In the
14327 broken case, if we followed the parent DIE of E, we'd again
14328 find Class, and once again go look at its template type
14329 arguments, etc., etc. Simply don't consider such parent die
14330 as source-level parent of this die (it can't be, the language
14331 doesn't allow it), and break the loop here. */
14332 name
= dwarf2_name (die
, cu
);
14333 parent_name
= dwarf2_name (parent
, cu
);
14334 complaint (&symfile_complaints
,
14335 _("template param type '%s' defined within parent '%s'"),
14336 name
? name
: "<unknown>",
14337 parent_name
? parent_name
: "<unknown>");
14341 switch (parent
->tag
)
14343 case DW_TAG_namespace
:
14344 parent_type
= read_type_die (parent
, cu
);
14345 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
14346 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
14347 Work around this problem here. */
14348 if (cu
->language
== language_cplus
14349 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
14351 /* We give a name to even anonymous namespaces. */
14352 return TYPE_TAG_NAME (parent_type
);
14353 case DW_TAG_class_type
:
14354 case DW_TAG_interface_type
:
14355 case DW_TAG_structure_type
:
14356 case DW_TAG_union_type
:
14357 case DW_TAG_module
:
14358 parent_type
= read_type_die (parent
, cu
);
14359 if (TYPE_TAG_NAME (parent_type
) != NULL
)
14360 return TYPE_TAG_NAME (parent_type
);
14362 /* An anonymous structure is only allowed non-static data
14363 members; no typedefs, no member functions, et cetera.
14364 So it does not need a prefix. */
14366 case DW_TAG_compile_unit
:
14367 case DW_TAG_partial_unit
:
14368 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
14369 if (cu
->language
== language_cplus
14370 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
14371 && die
->child
!= NULL
14372 && (die
->tag
== DW_TAG_class_type
14373 || die
->tag
== DW_TAG_structure_type
14374 || die
->tag
== DW_TAG_union_type
))
14376 char *name
= guess_full_die_structure_name (die
, cu
);
14382 return determine_prefix (parent
, cu
);
14386 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
14387 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
14388 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
14389 an obconcat, otherwise allocate storage for the result. The CU argument is
14390 used to determine the language and hence, the appropriate separator. */
14392 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
14395 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
14396 int physname
, struct dwarf2_cu
*cu
)
14398 const char *lead
= "";
14401 if (suffix
== NULL
|| suffix
[0] == '\0'
14402 || prefix
== NULL
|| prefix
[0] == '\0')
14404 else if (cu
->language
== language_java
)
14406 else if (cu
->language
== language_fortran
&& physname
)
14408 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
14409 DW_AT_MIPS_linkage_name is preferred and used instead. */
14417 if (prefix
== NULL
)
14419 if (suffix
== NULL
)
14425 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
14427 strcpy (retval
, lead
);
14428 strcat (retval
, prefix
);
14429 strcat (retval
, sep
);
14430 strcat (retval
, suffix
);
14435 /* We have an obstack. */
14436 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
14440 /* Return sibling of die, NULL if no sibling. */
14442 static struct die_info
*
14443 sibling_die (struct die_info
*die
)
14445 return die
->sibling
;
14448 /* Get name of a die, return NULL if not found. */
14451 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
14452 struct obstack
*obstack
)
14454 if (name
&& cu
->language
== language_cplus
)
14456 char *canon_name
= cp_canonicalize_string (name
);
14458 if (canon_name
!= NULL
)
14460 if (strcmp (canon_name
, name
) != 0)
14461 name
= obsavestring (canon_name
, strlen (canon_name
),
14463 xfree (canon_name
);
14470 /* Get name of a die, return NULL if not found. */
14473 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
14475 struct attribute
*attr
;
14477 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14478 if ((!attr
|| !DW_STRING (attr
))
14479 && die
->tag
!= DW_TAG_class_type
14480 && die
->tag
!= DW_TAG_interface_type
14481 && die
->tag
!= DW_TAG_structure_type
14482 && die
->tag
!= DW_TAG_union_type
)
14487 case DW_TAG_compile_unit
:
14488 case DW_TAG_partial_unit
:
14489 /* Compilation units have a DW_AT_name that is a filename, not
14490 a source language identifier. */
14491 case DW_TAG_enumeration_type
:
14492 case DW_TAG_enumerator
:
14493 /* These tags always have simple identifiers already; no need
14494 to canonicalize them. */
14495 return DW_STRING (attr
);
14497 case DW_TAG_subprogram
:
14498 /* Java constructors will all be named "<init>", so return
14499 the class name when we see this special case. */
14500 if (cu
->language
== language_java
14501 && DW_STRING (attr
) != NULL
14502 && strcmp (DW_STRING (attr
), "<init>") == 0)
14504 struct dwarf2_cu
*spec_cu
= cu
;
14505 struct die_info
*spec_die
;
14507 /* GCJ will output '<init>' for Java constructor names.
14508 For this special case, return the name of the parent class. */
14510 /* GCJ may output suprogram DIEs with AT_specification set.
14511 If so, use the name of the specified DIE. */
14512 spec_die
= die_specification (die
, &spec_cu
);
14513 if (spec_die
!= NULL
)
14514 return dwarf2_name (spec_die
, spec_cu
);
14519 if (die
->tag
== DW_TAG_class_type
)
14520 return dwarf2_name (die
, cu
);
14522 while (die
->tag
!= DW_TAG_compile_unit
14523 && die
->tag
!= DW_TAG_partial_unit
);
14527 case DW_TAG_class_type
:
14528 case DW_TAG_interface_type
:
14529 case DW_TAG_structure_type
:
14530 case DW_TAG_union_type
:
14531 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
14532 structures or unions. These were of the form "._%d" in GCC 4.1,
14533 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
14534 and GCC 4.4. We work around this problem by ignoring these. */
14535 if (attr
&& DW_STRING (attr
)
14536 && (strncmp (DW_STRING (attr
), "._", 2) == 0
14537 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
14540 /* GCC might emit a nameless typedef that has a linkage name. See
14541 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14542 if (!attr
|| DW_STRING (attr
) == NULL
)
14544 char *demangled
= NULL
;
14546 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
14548 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
14550 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
14553 /* Avoid demangling DW_STRING (attr) the second time on a second
14554 call for the same DIE. */
14555 if (!DW_STRING_IS_CANONICAL (attr
))
14556 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
14562 /* FIXME: we already did this for the partial symbol... */
14563 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
14564 &cu
->objfile
->objfile_obstack
);
14565 DW_STRING_IS_CANONICAL (attr
) = 1;
14568 /* Strip any leading namespaces/classes, keep only the base name.
14569 DW_AT_name for named DIEs does not contain the prefixes. */
14570 base
= strrchr (DW_STRING (attr
), ':');
14571 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
14574 return DW_STRING (attr
);
14583 if (!DW_STRING_IS_CANONICAL (attr
))
14586 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
14587 &cu
->objfile
->objfile_obstack
);
14588 DW_STRING_IS_CANONICAL (attr
) = 1;
14590 return DW_STRING (attr
);
14593 /* Return the die that this die in an extension of, or NULL if there
14594 is none. *EXT_CU is the CU containing DIE on input, and the CU
14595 containing the return value on output. */
14597 static struct die_info
*
14598 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
14600 struct attribute
*attr
;
14602 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
14606 return follow_die_ref (die
, attr
, ext_cu
);
14609 /* Convert a DIE tag into its string name. */
14611 static const char *
14612 dwarf_tag_name (unsigned tag
)
14614 const char *name
= get_DW_TAG_name (tag
);
14617 return "DW_TAG_<unknown>";
14622 /* Convert a DWARF attribute code into its string name. */
14624 static const char *
14625 dwarf_attr_name (unsigned attr
)
14629 #ifdef MIPS /* collides with DW_AT_HP_block_index */
14630 if (attr
== DW_AT_MIPS_fde
)
14631 return "DW_AT_MIPS_fde";
14633 if (attr
== DW_AT_HP_block_index
)
14634 return "DW_AT_HP_block_index";
14637 name
= get_DW_AT_name (attr
);
14640 return "DW_AT_<unknown>";
14645 /* Convert a DWARF value form code into its string name. */
14647 static const char *
14648 dwarf_form_name (unsigned form
)
14650 const char *name
= get_DW_FORM_name (form
);
14653 return "DW_FORM_<unknown>";
14659 dwarf_bool_name (unsigned mybool
)
14667 /* Convert a DWARF type code into its string name. */
14669 static const char *
14670 dwarf_type_encoding_name (unsigned enc
)
14672 const char *name
= get_DW_ATE_name (enc
);
14675 return "DW_ATE_<unknown>";
14681 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
14685 print_spaces (indent
, f
);
14686 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
14687 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
14689 if (die
->parent
!= NULL
)
14691 print_spaces (indent
, f
);
14692 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
14693 die
->parent
->offset
.sect_off
);
14696 print_spaces (indent
, f
);
14697 fprintf_unfiltered (f
, " has children: %s\n",
14698 dwarf_bool_name (die
->child
!= NULL
));
14700 print_spaces (indent
, f
);
14701 fprintf_unfiltered (f
, " attributes:\n");
14703 for (i
= 0; i
< die
->num_attrs
; ++i
)
14705 print_spaces (indent
, f
);
14706 fprintf_unfiltered (f
, " %s (%s) ",
14707 dwarf_attr_name (die
->attrs
[i
].name
),
14708 dwarf_form_name (die
->attrs
[i
].form
));
14710 switch (die
->attrs
[i
].form
)
14713 case DW_FORM_GNU_addr_index
:
14714 fprintf_unfiltered (f
, "address: ");
14715 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
14717 case DW_FORM_block2
:
14718 case DW_FORM_block4
:
14719 case DW_FORM_block
:
14720 case DW_FORM_block1
:
14721 fprintf_unfiltered (f
, "block: size %d",
14722 DW_BLOCK (&die
->attrs
[i
])->size
);
14724 case DW_FORM_exprloc
:
14725 fprintf_unfiltered (f
, "expression: size %u",
14726 DW_BLOCK (&die
->attrs
[i
])->size
);
14728 case DW_FORM_ref_addr
:
14729 fprintf_unfiltered (f
, "ref address: ");
14730 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
14736 case DW_FORM_ref_udata
:
14737 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
14738 (long) (DW_UNSND (&die
->attrs
[i
])));
14740 case DW_FORM_data1
:
14741 case DW_FORM_data2
:
14742 case DW_FORM_data4
:
14743 case DW_FORM_data8
:
14744 case DW_FORM_udata
:
14745 case DW_FORM_sdata
:
14746 fprintf_unfiltered (f
, "constant: %s",
14747 pulongest (DW_UNSND (&die
->attrs
[i
])));
14749 case DW_FORM_sec_offset
:
14750 fprintf_unfiltered (f
, "section offset: %s",
14751 pulongest (DW_UNSND (&die
->attrs
[i
])));
14753 case DW_FORM_ref_sig8
:
14754 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
14755 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
14756 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
14758 fprintf_unfiltered (f
, "signatured type, offset: unknown");
14760 case DW_FORM_string
:
14762 case DW_FORM_GNU_str_index
:
14763 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
14764 DW_STRING (&die
->attrs
[i
])
14765 ? DW_STRING (&die
->attrs
[i
]) : "",
14766 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
14769 if (DW_UNSND (&die
->attrs
[i
]))
14770 fprintf_unfiltered (f
, "flag: TRUE");
14772 fprintf_unfiltered (f
, "flag: FALSE");
14774 case DW_FORM_flag_present
:
14775 fprintf_unfiltered (f
, "flag: TRUE");
14777 case DW_FORM_indirect
:
14778 /* The reader will have reduced the indirect form to
14779 the "base form" so this form should not occur. */
14780 fprintf_unfiltered (f
,
14781 "unexpected attribute form: DW_FORM_indirect");
14784 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
14785 die
->attrs
[i
].form
);
14788 fprintf_unfiltered (f
, "\n");
14793 dump_die_for_error (struct die_info
*die
)
14795 dump_die_shallow (gdb_stderr
, 0, die
);
14799 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
14801 int indent
= level
* 4;
14803 gdb_assert (die
!= NULL
);
14805 if (level
>= max_level
)
14808 dump_die_shallow (f
, indent
, die
);
14810 if (die
->child
!= NULL
)
14812 print_spaces (indent
, f
);
14813 fprintf_unfiltered (f
, " Children:");
14814 if (level
+ 1 < max_level
)
14816 fprintf_unfiltered (f
, "\n");
14817 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
14821 fprintf_unfiltered (f
,
14822 " [not printed, max nesting level reached]\n");
14826 if (die
->sibling
!= NULL
&& level
> 0)
14828 dump_die_1 (f
, level
, max_level
, die
->sibling
);
14832 /* This is called from the pdie macro in gdbinit.in.
14833 It's not static so gcc will keep a copy callable from gdb. */
14836 dump_die (struct die_info
*die
, int max_level
)
14838 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
14842 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
14846 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
14852 /* DW_ADDR is always stored already as sect_offset; despite for the forms
14853 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
14856 is_ref_attr (struct attribute
*attr
)
14858 switch (attr
->form
)
14860 case DW_FORM_ref_addr
:
14865 case DW_FORM_ref_udata
:
14872 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
14876 dwarf2_get_ref_die_offset (struct attribute
*attr
)
14878 sect_offset retval
= { DW_UNSND (attr
) };
14880 if (is_ref_attr (attr
))
14883 retval
.sect_off
= 0;
14884 complaint (&symfile_complaints
,
14885 _("unsupported die ref attribute form: '%s'"),
14886 dwarf_form_name (attr
->form
));
14890 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
14891 * the value held by the attribute is not constant. */
14894 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
14896 if (attr
->form
== DW_FORM_sdata
)
14897 return DW_SND (attr
);
14898 else if (attr
->form
== DW_FORM_udata
14899 || attr
->form
== DW_FORM_data1
14900 || attr
->form
== DW_FORM_data2
14901 || attr
->form
== DW_FORM_data4
14902 || attr
->form
== DW_FORM_data8
)
14903 return DW_UNSND (attr
);
14906 complaint (&symfile_complaints
,
14907 _("Attribute value is not a constant (%s)"),
14908 dwarf_form_name (attr
->form
));
14909 return default_value
;
14913 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
14914 unit and add it to our queue.
14915 The result is non-zero if PER_CU was queued, otherwise the result is zero
14916 meaning either PER_CU is already queued or it is already loaded. */
14919 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
14920 struct dwarf2_per_cu_data
*per_cu
,
14921 enum language pretend_language
)
14923 /* We may arrive here during partial symbol reading, if we need full
14924 DIEs to process an unusual case (e.g. template arguments). Do
14925 not queue PER_CU, just tell our caller to load its DIEs. */
14926 if (dwarf2_per_objfile
->reading_partial_symbols
)
14928 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
14933 /* Mark the dependence relation so that we don't flush PER_CU
14935 dwarf2_add_dependence (this_cu
, per_cu
);
14937 /* If it's already on the queue, we have nothing to do. */
14938 if (per_cu
->queued
)
14941 /* If the compilation unit is already loaded, just mark it as
14943 if (per_cu
->cu
!= NULL
)
14945 per_cu
->cu
->last_used
= 0;
14949 /* Add it to the queue. */
14950 queue_comp_unit (per_cu
, pretend_language
);
14955 /* Follow reference or signature attribute ATTR of SRC_DIE.
14956 On entry *REF_CU is the CU of SRC_DIE.
14957 On exit *REF_CU is the CU of the result. */
14959 static struct die_info
*
14960 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
14961 struct dwarf2_cu
**ref_cu
)
14963 struct die_info
*die
;
14965 if (is_ref_attr (attr
))
14966 die
= follow_die_ref (src_die
, attr
, ref_cu
);
14967 else if (attr
->form
== DW_FORM_ref_sig8
)
14968 die
= follow_die_sig (src_die
, attr
, ref_cu
);
14971 dump_die_for_error (src_die
);
14972 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
14973 (*ref_cu
)->objfile
->name
);
14979 /* Follow reference OFFSET.
14980 On entry *REF_CU is the CU of the source die referencing OFFSET.
14981 On exit *REF_CU is the CU of the result.
14982 Returns NULL if OFFSET is invalid. */
14984 static struct die_info
*
14985 follow_die_offset (sect_offset offset
, struct dwarf2_cu
**ref_cu
)
14987 struct die_info temp_die
;
14988 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
14990 gdb_assert (cu
->per_cu
!= NULL
);
14994 if (cu
->per_cu
->is_debug_types
)
14996 /* .debug_types CUs cannot reference anything outside their CU.
14997 If they need to, they have to reference a signatured type via
14998 DW_FORM_ref_sig8. */
14999 if (! offset_in_cu_p (&cu
->header
, offset
))
15002 else if (! offset_in_cu_p (&cu
->header
, offset
))
15004 struct dwarf2_per_cu_data
*per_cu
;
15006 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
15008 /* If necessary, add it to the queue and load its DIEs. */
15009 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
15010 load_full_comp_unit (per_cu
, cu
->language
);
15012 target_cu
= per_cu
->cu
;
15014 else if (cu
->dies
== NULL
)
15016 /* We're loading full DIEs during partial symbol reading. */
15017 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
15018 load_full_comp_unit (cu
->per_cu
, language_minimal
);
15021 *ref_cu
= target_cu
;
15022 temp_die
.offset
= offset
;
15023 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
15026 /* Follow reference attribute ATTR of SRC_DIE.
15027 On entry *REF_CU is the CU of SRC_DIE.
15028 On exit *REF_CU is the CU of the result. */
15030 static struct die_info
*
15031 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
15032 struct dwarf2_cu
**ref_cu
)
15034 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15035 struct dwarf2_cu
*cu
= *ref_cu
;
15036 struct die_info
*die
;
15038 die
= follow_die_offset (offset
, ref_cu
);
15040 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
15041 "at 0x%x [in module %s]"),
15042 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
15047 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
15048 Returned value is intended for DW_OP_call*. Returned
15049 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
15051 struct dwarf2_locexpr_baton
15052 dwarf2_fetch_die_location_block (cu_offset offset_in_cu
,
15053 struct dwarf2_per_cu_data
*per_cu
,
15054 CORE_ADDR (*get_frame_pc
) (void *baton
),
15057 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
15058 struct dwarf2_cu
*cu
;
15059 struct die_info
*die
;
15060 struct attribute
*attr
;
15061 struct dwarf2_locexpr_baton retval
;
15063 dw2_setup (per_cu
->objfile
);
15065 if (per_cu
->cu
== NULL
)
15069 die
= follow_die_offset (offset
, &cu
);
15071 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
15072 offset
.sect_off
, per_cu
->objfile
->name
);
15074 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15077 /* DWARF: "If there is no such attribute, then there is no effect.".
15078 DATA is ignored if SIZE is 0. */
15080 retval
.data
= NULL
;
15083 else if (attr_form_is_section_offset (attr
))
15085 struct dwarf2_loclist_baton loclist_baton
;
15086 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
15089 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
15091 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
15093 retval
.size
= size
;
15097 if (!attr_form_is_block (attr
))
15098 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
15099 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
15100 offset
.sect_off
, per_cu
->objfile
->name
);
15102 retval
.data
= DW_BLOCK (attr
)->data
;
15103 retval
.size
= DW_BLOCK (attr
)->size
;
15105 retval
.per_cu
= cu
->per_cu
;
15107 age_cached_comp_units ();
15112 /* Return the type of the DIE at DIE_OFFSET in the CU named by
15116 dwarf2_get_die_type (cu_offset die_offset
,
15117 struct dwarf2_per_cu_data
*per_cu
)
15119 sect_offset die_offset_sect
;
15121 dw2_setup (per_cu
->objfile
);
15123 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
15124 return get_die_type_at_offset (die_offset_sect
, per_cu
);
15127 /* Follow the signature attribute ATTR in SRC_DIE.
15128 On entry *REF_CU is the CU of SRC_DIE.
15129 On exit *REF_CU is the CU of the result. */
15131 static struct die_info
*
15132 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
15133 struct dwarf2_cu
**ref_cu
)
15135 struct objfile
*objfile
= (*ref_cu
)->objfile
;
15136 struct die_info temp_die
;
15137 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
15138 struct dwarf2_cu
*sig_cu
;
15139 struct die_info
*die
;
15141 /* sig_type will be NULL if the signatured type is missing from
15143 if (sig_type
== NULL
)
15144 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
15145 "at 0x%x [in module %s]"),
15146 src_die
->offset
.sect_off
, objfile
->name
);
15148 /* If necessary, add it to the queue and load its DIEs. */
15150 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
15151 read_signatured_type (sig_type
);
15153 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
15155 sig_cu
= sig_type
->per_cu
.cu
;
15156 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
15157 temp_die
.offset
= sig_type
->type_offset_in_section
;
15158 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
15159 temp_die
.offset
.sect_off
);
15166 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
15167 "from DIE at 0x%x [in module %s]"),
15168 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
15171 /* Given an offset of a signatured type, return its signatured_type. */
15173 static struct signatured_type
*
15174 lookup_signatured_type_at_offset (struct objfile
*objfile
,
15175 struct dwarf2_section_info
*section
,
15176 sect_offset offset
)
15178 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
15179 unsigned int length
, initial_length_size
;
15180 unsigned int sig_offset
;
15181 struct signatured_type find_entry
, *sig_type
;
15183 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
15184 sig_offset
= (initial_length_size
15186 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
15187 + 1 /*address_size*/);
15188 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
15189 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
15191 /* This is only used to lookup previously recorded types.
15192 If we didn't find it, it's our bug. */
15193 gdb_assert (sig_type
!= NULL
);
15194 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
15199 /* Load the DIEs associated with type unit PER_CU into memory. */
15202 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
15204 struct objfile
*objfile
= per_cu
->objfile
;
15205 struct dwarf2_section_info
*sect
= per_cu
->info_or_types_section
;
15206 sect_offset offset
= per_cu
->offset
;
15207 struct signatured_type
*sig_type
;
15209 dwarf2_read_section (objfile
, sect
);
15211 /* We have the section offset, but we need the signature to do the
15212 hash table lookup. */
15213 /* FIXME: This is sorta unnecessary, read_signatured_type only uses
15214 the signature to assert we found the right one.
15215 Ok, but it's a lot of work. We should simplify things so any needed
15216 assert doesn't require all this clumsiness. */
15217 sig_type
= lookup_signatured_type_at_offset (objfile
, sect
, offset
);
15219 gdb_assert (&sig_type
->per_cu
== per_cu
);
15220 gdb_assert (sig_type
->per_cu
.cu
== NULL
);
15222 read_signatured_type (sig_type
);
15224 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
15227 /* die_reader_func for read_signatured_type.
15228 This is identical to load_full_comp_unit_reader,
15229 but is kept separate for now. */
15232 read_signatured_type_reader (const struct die_reader_specs
*reader
,
15233 gdb_byte
*info_ptr
,
15234 struct die_info
*comp_unit_die
,
15238 struct dwarf2_cu
*cu
= reader
->cu
;
15240 gdb_assert (cu
->die_hash
== NULL
);
15242 htab_create_alloc_ex (cu
->header
.length
/ 12,
15246 &cu
->comp_unit_obstack
,
15247 hashtab_obstack_allocate
,
15248 dummy_obstack_deallocate
);
15251 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
15252 &info_ptr
, comp_unit_die
);
15253 cu
->dies
= comp_unit_die
;
15254 /* comp_unit_die is not stored in die_hash, no need. */
15256 /* We try not to read any attributes in this function, because not
15257 all CUs needed for references have been loaded yet, and symbol
15258 table processing isn't initialized. But we have to set the CU language,
15259 or we won't be able to build types correctly.
15260 Similarly, if we do not read the producer, we can not apply
15261 producer-specific interpretation. */
15262 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
15265 /* Read in a signatured type and build its CU and DIEs.
15266 If the type is a stub for the real type in a DWO file,
15267 read in the real type from the DWO file as well. */
15270 read_signatured_type (struct signatured_type
*sig_type
)
15272 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
15274 gdb_assert (per_cu
->is_debug_types
);
15275 gdb_assert (per_cu
->cu
== NULL
);
15277 init_cutu_and_read_dies (per_cu
, 0, 1, read_signatured_type_reader
, NULL
);
15280 /* Decode simple location descriptions.
15281 Given a pointer to a dwarf block that defines a location, compute
15282 the location and return the value.
15284 NOTE drow/2003-11-18: This function is called in two situations
15285 now: for the address of static or global variables (partial symbols
15286 only) and for offsets into structures which are expected to be
15287 (more or less) constant. The partial symbol case should go away,
15288 and only the constant case should remain. That will let this
15289 function complain more accurately. A few special modes are allowed
15290 without complaint for global variables (for instance, global
15291 register values and thread-local values).
15293 A location description containing no operations indicates that the
15294 object is optimized out. The return value is 0 for that case.
15295 FIXME drow/2003-11-16: No callers check for this case any more; soon all
15296 callers will only want a very basic result and this can become a
15299 Note that stack[0] is unused except as a default error return. */
15302 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
15304 struct objfile
*objfile
= cu
->objfile
;
15306 int size
= blk
->size
;
15307 gdb_byte
*data
= blk
->data
;
15308 CORE_ADDR stack
[64];
15310 unsigned int bytes_read
, unsnd
;
15316 stack
[++stacki
] = 0;
15355 stack
[++stacki
] = op
- DW_OP_lit0
;
15390 stack
[++stacki
] = op
- DW_OP_reg0
;
15392 dwarf2_complex_location_expr_complaint ();
15396 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
15398 stack
[++stacki
] = unsnd
;
15400 dwarf2_complex_location_expr_complaint ();
15404 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
15409 case DW_OP_const1u
:
15410 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
15414 case DW_OP_const1s
:
15415 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
15419 case DW_OP_const2u
:
15420 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
15424 case DW_OP_const2s
:
15425 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
15429 case DW_OP_const4u
:
15430 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
15434 case DW_OP_const4s
:
15435 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
15439 case DW_OP_const8u
:
15440 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
15445 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
15451 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
15456 stack
[stacki
+ 1] = stack
[stacki
];
15461 stack
[stacki
- 1] += stack
[stacki
];
15465 case DW_OP_plus_uconst
:
15466 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
15472 stack
[stacki
- 1] -= stack
[stacki
];
15477 /* If we're not the last op, then we definitely can't encode
15478 this using GDB's address_class enum. This is valid for partial
15479 global symbols, although the variable's address will be bogus
15482 dwarf2_complex_location_expr_complaint ();
15485 case DW_OP_GNU_push_tls_address
:
15486 /* The top of the stack has the offset from the beginning
15487 of the thread control block at which the variable is located. */
15488 /* Nothing should follow this operator, so the top of stack would
15490 /* This is valid for partial global symbols, but the variable's
15491 address will be bogus in the psymtab. Make it always at least
15492 non-zero to not look as a variable garbage collected by linker
15493 which have DW_OP_addr 0. */
15495 dwarf2_complex_location_expr_complaint ();
15499 case DW_OP_GNU_uninit
:
15502 case DW_OP_GNU_addr_index
:
15503 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
15510 const char *name
= get_DW_OP_name (op
);
15513 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
15516 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
15520 return (stack
[stacki
]);
15523 /* Enforce maximum stack depth of SIZE-1 to avoid writing
15524 outside of the allocated space. Also enforce minimum>0. */
15525 if (stacki
>= ARRAY_SIZE (stack
) - 1)
15527 complaint (&symfile_complaints
,
15528 _("location description stack overflow"));
15534 complaint (&symfile_complaints
,
15535 _("location description stack underflow"));
15539 return (stack
[stacki
]);
15542 /* memory allocation interface */
15544 static struct dwarf_block
*
15545 dwarf_alloc_block (struct dwarf2_cu
*cu
)
15547 struct dwarf_block
*blk
;
15549 blk
= (struct dwarf_block
*)
15550 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
15554 static struct abbrev_info
*
15555 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
15557 struct abbrev_info
*abbrev
;
15559 abbrev
= (struct abbrev_info
*)
15560 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
15561 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15565 static struct die_info
*
15566 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
15568 struct die_info
*die
;
15569 size_t size
= sizeof (struct die_info
);
15572 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
15574 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
15575 memset (die
, 0, sizeof (struct die_info
));
15580 /* Macro support. */
15582 /* Return the full name of file number I in *LH's file name table.
15583 Use COMP_DIR as the name of the current directory of the
15584 compilation. The result is allocated using xmalloc; the caller is
15585 responsible for freeing it. */
15587 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
15589 /* Is the file number a valid index into the line header's file name
15590 table? Remember that file numbers start with one, not zero. */
15591 if (1 <= file
&& file
<= lh
->num_file_names
)
15593 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15595 if (IS_ABSOLUTE_PATH (fe
->name
))
15596 return xstrdup (fe
->name
);
15604 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15610 dir_len
= strlen (dir
);
15611 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
15612 strcpy (full_name
, dir
);
15613 full_name
[dir_len
] = '/';
15614 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
15618 return xstrdup (fe
->name
);
15623 /* The compiler produced a bogus file number. We can at least
15624 record the macro definitions made in the file, even if we
15625 won't be able to find the file by name. */
15626 char fake_name
[80];
15628 sprintf (fake_name
, "<bad macro file number %d>", file
);
15630 complaint (&symfile_complaints
,
15631 _("bad file number in macro information (%d)"),
15634 return xstrdup (fake_name
);
15639 static struct macro_source_file
*
15640 macro_start_file (int file
, int line
,
15641 struct macro_source_file
*current_file
,
15642 const char *comp_dir
,
15643 struct line_header
*lh
, struct objfile
*objfile
)
15645 /* The full name of this source file. */
15646 char *full_name
= file_full_name (file
, lh
, comp_dir
);
15648 /* We don't create a macro table for this compilation unit
15649 at all until we actually get a filename. */
15650 if (! pending_macros
)
15651 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
15652 objfile
->macro_cache
);
15654 if (! current_file
)
15656 /* If we have no current file, then this must be the start_file
15657 directive for the compilation unit's main source file. */
15658 current_file
= macro_set_main (pending_macros
, full_name
);
15659 macro_define_special (pending_macros
);
15662 current_file
= macro_include (current_file
, line
, full_name
);
15666 return current_file
;
15670 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
15671 followed by a null byte. */
15673 copy_string (const char *buf
, int len
)
15675 char *s
= xmalloc (len
+ 1);
15677 memcpy (s
, buf
, len
);
15683 static const char *
15684 consume_improper_spaces (const char *p
, const char *body
)
15688 complaint (&symfile_complaints
,
15689 _("macro definition contains spaces "
15690 "in formal argument list:\n`%s'"),
15702 parse_macro_definition (struct macro_source_file
*file
, int line
,
15707 /* The body string takes one of two forms. For object-like macro
15708 definitions, it should be:
15710 <macro name> " " <definition>
15712 For function-like macro definitions, it should be:
15714 <macro name> "() " <definition>
15716 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
15718 Spaces may appear only where explicitly indicated, and in the
15721 The Dwarf 2 spec says that an object-like macro's name is always
15722 followed by a space, but versions of GCC around March 2002 omit
15723 the space when the macro's definition is the empty string.
15725 The Dwarf 2 spec says that there should be no spaces between the
15726 formal arguments in a function-like macro's formal argument list,
15727 but versions of GCC around March 2002 include spaces after the
15731 /* Find the extent of the macro name. The macro name is terminated
15732 by either a space or null character (for an object-like macro) or
15733 an opening paren (for a function-like macro). */
15734 for (p
= body
; *p
; p
++)
15735 if (*p
== ' ' || *p
== '(')
15738 if (*p
== ' ' || *p
== '\0')
15740 /* It's an object-like macro. */
15741 int name_len
= p
- body
;
15742 char *name
= copy_string (body
, name_len
);
15743 const char *replacement
;
15746 replacement
= body
+ name_len
+ 1;
15749 dwarf2_macro_malformed_definition_complaint (body
);
15750 replacement
= body
+ name_len
;
15753 macro_define_object (file
, line
, name
, replacement
);
15757 else if (*p
== '(')
15759 /* It's a function-like macro. */
15760 char *name
= copy_string (body
, p
- body
);
15763 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
15767 p
= consume_improper_spaces (p
, body
);
15769 /* Parse the formal argument list. */
15770 while (*p
&& *p
!= ')')
15772 /* Find the extent of the current argument name. */
15773 const char *arg_start
= p
;
15775 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
15778 if (! *p
|| p
== arg_start
)
15779 dwarf2_macro_malformed_definition_complaint (body
);
15782 /* Make sure argv has room for the new argument. */
15783 if (argc
>= argv_size
)
15786 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
15789 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
15792 p
= consume_improper_spaces (p
, body
);
15794 /* Consume the comma, if present. */
15799 p
= consume_improper_spaces (p
, body
);
15808 /* Perfectly formed definition, no complaints. */
15809 macro_define_function (file
, line
, name
,
15810 argc
, (const char **) argv
,
15812 else if (*p
== '\0')
15814 /* Complain, but do define it. */
15815 dwarf2_macro_malformed_definition_complaint (body
);
15816 macro_define_function (file
, line
, name
,
15817 argc
, (const char **) argv
,
15821 /* Just complain. */
15822 dwarf2_macro_malformed_definition_complaint (body
);
15825 /* Just complain. */
15826 dwarf2_macro_malformed_definition_complaint (body
);
15832 for (i
= 0; i
< argc
; i
++)
15838 dwarf2_macro_malformed_definition_complaint (body
);
15841 /* Skip some bytes from BYTES according to the form given in FORM.
15842 Returns the new pointer. */
15845 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
15846 enum dwarf_form form
,
15847 unsigned int offset_size
,
15848 struct dwarf2_section_info
*section
)
15850 unsigned int bytes_read
;
15854 case DW_FORM_data1
:
15859 case DW_FORM_data2
:
15863 case DW_FORM_data4
:
15867 case DW_FORM_data8
:
15871 case DW_FORM_string
:
15872 read_direct_string (abfd
, bytes
, &bytes_read
);
15873 bytes
+= bytes_read
;
15876 case DW_FORM_sec_offset
:
15878 bytes
+= offset_size
;
15881 case DW_FORM_block
:
15882 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
15883 bytes
+= bytes_read
;
15886 case DW_FORM_block1
:
15887 bytes
+= 1 + read_1_byte (abfd
, bytes
);
15889 case DW_FORM_block2
:
15890 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
15892 case DW_FORM_block4
:
15893 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
15896 case DW_FORM_sdata
:
15897 case DW_FORM_udata
:
15898 case DW_FORM_GNU_addr_index
:
15899 case DW_FORM_GNU_str_index
:
15900 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
15903 dwarf2_section_buffer_overflow_complaint (section
);
15911 complaint (&symfile_complaints
,
15912 _("invalid form 0x%x in `%s'"),
15914 section
->asection
->name
);
15922 /* A helper for dwarf_decode_macros that handles skipping an unknown
15923 opcode. Returns an updated pointer to the macro data buffer; or,
15924 on error, issues a complaint and returns NULL. */
15927 skip_unknown_opcode (unsigned int opcode
,
15928 gdb_byte
**opcode_definitions
,
15929 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
15931 unsigned int offset_size
,
15932 struct dwarf2_section_info
*section
)
15934 unsigned int bytes_read
, i
;
15938 if (opcode_definitions
[opcode
] == NULL
)
15940 complaint (&symfile_complaints
,
15941 _("unrecognized DW_MACFINO opcode 0x%x"),
15946 defn
= opcode_definitions
[opcode
];
15947 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
15948 defn
+= bytes_read
;
15950 for (i
= 0; i
< arg
; ++i
)
15952 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
15954 if (mac_ptr
== NULL
)
15956 /* skip_form_bytes already issued the complaint. */
15964 /* A helper function which parses the header of a macro section.
15965 If the macro section is the extended (for now called "GNU") type,
15966 then this updates *OFFSET_SIZE. Returns a pointer to just after
15967 the header, or issues a complaint and returns NULL on error. */
15970 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
15973 unsigned int *offset_size
,
15974 int section_is_gnu
)
15976 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
15978 if (section_is_gnu
)
15980 unsigned int version
, flags
;
15982 version
= read_2_bytes (abfd
, mac_ptr
);
15985 complaint (&symfile_complaints
,
15986 _("unrecognized version `%d' in .debug_macro section"),
15992 flags
= read_1_byte (abfd
, mac_ptr
);
15994 *offset_size
= (flags
& 1) ? 8 : 4;
15996 if ((flags
& 2) != 0)
15997 /* We don't need the line table offset. */
15998 mac_ptr
+= *offset_size
;
16000 /* Vendor opcode descriptions. */
16001 if ((flags
& 4) != 0)
16003 unsigned int i
, count
;
16005 count
= read_1_byte (abfd
, mac_ptr
);
16007 for (i
= 0; i
< count
; ++i
)
16009 unsigned int opcode
, bytes_read
;
16012 opcode
= read_1_byte (abfd
, mac_ptr
);
16014 opcode_definitions
[opcode
] = mac_ptr
;
16015 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16016 mac_ptr
+= bytes_read
;
16025 /* A helper for dwarf_decode_macros that handles the GNU extensions,
16026 including DW_MACRO_GNU_transparent_include. */
16029 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
16030 struct macro_source_file
*current_file
,
16031 struct line_header
*lh
, char *comp_dir
,
16032 struct dwarf2_section_info
*section
,
16033 int section_is_gnu
,
16034 unsigned int offset_size
,
16035 struct objfile
*objfile
,
16036 htab_t include_hash
)
16038 enum dwarf_macro_record_type macinfo_type
;
16039 int at_commandline
;
16040 gdb_byte
*opcode_definitions
[256];
16042 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
16043 &offset_size
, section_is_gnu
);
16044 if (mac_ptr
== NULL
)
16046 /* We already issued a complaint. */
16050 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
16051 GDB is still reading the definitions from command line. First
16052 DW_MACINFO_start_file will need to be ignored as it was already executed
16053 to create CURRENT_FILE for the main source holding also the command line
16054 definitions. On first met DW_MACINFO_start_file this flag is reset to
16055 normally execute all the remaining DW_MACINFO_start_file macinfos. */
16057 at_commandline
= 1;
16061 /* Do we at least have room for a macinfo type byte? */
16062 if (mac_ptr
>= mac_end
)
16064 dwarf2_section_buffer_overflow_complaint (section
);
16068 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
16071 /* Note that we rely on the fact that the corresponding GNU and
16072 DWARF constants are the same. */
16073 switch (macinfo_type
)
16075 /* A zero macinfo type indicates the end of the macro
16080 case DW_MACRO_GNU_define
:
16081 case DW_MACRO_GNU_undef
:
16082 case DW_MACRO_GNU_define_indirect
:
16083 case DW_MACRO_GNU_undef_indirect
:
16085 unsigned int bytes_read
;
16090 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16091 mac_ptr
+= bytes_read
;
16093 if (macinfo_type
== DW_MACRO_GNU_define
16094 || macinfo_type
== DW_MACRO_GNU_undef
)
16096 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16097 mac_ptr
+= bytes_read
;
16101 LONGEST str_offset
;
16103 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
16104 mac_ptr
+= offset_size
;
16106 body
= read_indirect_string_at_offset (abfd
, str_offset
);
16109 is_define
= (macinfo_type
== DW_MACRO_GNU_define
16110 || macinfo_type
== DW_MACRO_GNU_define_indirect
);
16111 if (! current_file
)
16113 /* DWARF violation as no main source is present. */
16114 complaint (&symfile_complaints
,
16115 _("debug info with no main source gives macro %s "
16117 is_define
? _("definition") : _("undefinition"),
16121 if ((line
== 0 && !at_commandline
)
16122 || (line
!= 0 && at_commandline
))
16123 complaint (&symfile_complaints
,
16124 _("debug info gives %s macro %s with %s line %d: %s"),
16125 at_commandline
? _("command-line") : _("in-file"),
16126 is_define
? _("definition") : _("undefinition"),
16127 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
16130 parse_macro_definition (current_file
, line
, body
);
16133 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
16134 || macinfo_type
== DW_MACRO_GNU_undef_indirect
);
16135 macro_undef (current_file
, line
, body
);
16140 case DW_MACRO_GNU_start_file
:
16142 unsigned int bytes_read
;
16145 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16146 mac_ptr
+= bytes_read
;
16147 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16148 mac_ptr
+= bytes_read
;
16150 if ((line
== 0 && !at_commandline
)
16151 || (line
!= 0 && at_commandline
))
16152 complaint (&symfile_complaints
,
16153 _("debug info gives source %d included "
16154 "from %s at %s line %d"),
16155 file
, at_commandline
? _("command-line") : _("file"),
16156 line
== 0 ? _("zero") : _("non-zero"), line
);
16158 if (at_commandline
)
16160 /* This DW_MACRO_GNU_start_file was executed in the
16162 at_commandline
= 0;
16165 current_file
= macro_start_file (file
, line
,
16166 current_file
, comp_dir
,
16171 case DW_MACRO_GNU_end_file
:
16172 if (! current_file
)
16173 complaint (&symfile_complaints
,
16174 _("macro debug info has an unmatched "
16175 "`close_file' directive"));
16178 current_file
= current_file
->included_by
;
16179 if (! current_file
)
16181 enum dwarf_macro_record_type next_type
;
16183 /* GCC circa March 2002 doesn't produce the zero
16184 type byte marking the end of the compilation
16185 unit. Complain if it's not there, but exit no
16188 /* Do we at least have room for a macinfo type byte? */
16189 if (mac_ptr
>= mac_end
)
16191 dwarf2_section_buffer_overflow_complaint (section
);
16195 /* We don't increment mac_ptr here, so this is just
16197 next_type
= read_1_byte (abfd
, mac_ptr
);
16198 if (next_type
!= 0)
16199 complaint (&symfile_complaints
,
16200 _("no terminating 0-type entry for "
16201 "macros in `.debug_macinfo' section"));
16208 case DW_MACRO_GNU_transparent_include
:
16213 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
16214 mac_ptr
+= offset_size
;
16216 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
16219 /* This has actually happened; see
16220 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
16221 complaint (&symfile_complaints
,
16222 _("recursive DW_MACRO_GNU_transparent_include in "
16223 ".debug_macro section"));
16229 dwarf_decode_macro_bytes (abfd
,
16230 section
->buffer
+ offset
,
16231 mac_end
, current_file
,
16233 section
, section_is_gnu
,
16234 offset_size
, objfile
, include_hash
);
16236 htab_remove_elt (include_hash
, mac_ptr
);
16241 case DW_MACINFO_vendor_ext
:
16242 if (!section_is_gnu
)
16244 unsigned int bytes_read
;
16247 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16248 mac_ptr
+= bytes_read
;
16249 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16250 mac_ptr
+= bytes_read
;
16252 /* We don't recognize any vendor extensions. */
16258 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
16259 mac_ptr
, mac_end
, abfd
, offset_size
,
16261 if (mac_ptr
== NULL
)
16265 } while (macinfo_type
!= 0);
16269 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
16270 char *comp_dir
, bfd
*abfd
,
16271 struct dwarf2_cu
*cu
,
16272 struct dwarf2_section_info
*section
,
16273 int section_is_gnu
, const char *section_name
)
16275 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16276 gdb_byte
*mac_ptr
, *mac_end
;
16277 struct macro_source_file
*current_file
= 0;
16278 enum dwarf_macro_record_type macinfo_type
;
16279 unsigned int offset_size
= cu
->header
.offset_size
;
16280 gdb_byte
*opcode_definitions
[256];
16281 struct cleanup
*cleanup
;
16282 htab_t include_hash
;
16285 dwarf2_read_section (objfile
, section
);
16286 if (section
->buffer
== NULL
)
16288 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
16292 /* First pass: Find the name of the base filename.
16293 This filename is needed in order to process all macros whose definition
16294 (or undefinition) comes from the command line. These macros are defined
16295 before the first DW_MACINFO_start_file entry, and yet still need to be
16296 associated to the base file.
16298 To determine the base file name, we scan the macro definitions until we
16299 reach the first DW_MACINFO_start_file entry. We then initialize
16300 CURRENT_FILE accordingly so that any macro definition found before the
16301 first DW_MACINFO_start_file can still be associated to the base file. */
16303 mac_ptr
= section
->buffer
+ offset
;
16304 mac_end
= section
->buffer
+ section
->size
;
16306 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
16307 &offset_size
, section_is_gnu
);
16308 if (mac_ptr
== NULL
)
16310 /* We already issued a complaint. */
16316 /* Do we at least have room for a macinfo type byte? */
16317 if (mac_ptr
>= mac_end
)
16319 /* Complaint is printed during the second pass as GDB will probably
16320 stop the first pass earlier upon finding
16321 DW_MACINFO_start_file. */
16325 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
16328 /* Note that we rely on the fact that the corresponding GNU and
16329 DWARF constants are the same. */
16330 switch (macinfo_type
)
16332 /* A zero macinfo type indicates the end of the macro
16337 case DW_MACRO_GNU_define
:
16338 case DW_MACRO_GNU_undef
:
16339 /* Only skip the data by MAC_PTR. */
16341 unsigned int bytes_read
;
16343 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16344 mac_ptr
+= bytes_read
;
16345 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16346 mac_ptr
+= bytes_read
;
16350 case DW_MACRO_GNU_start_file
:
16352 unsigned int bytes_read
;
16355 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16356 mac_ptr
+= bytes_read
;
16357 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16358 mac_ptr
+= bytes_read
;
16360 current_file
= macro_start_file (file
, line
, current_file
,
16361 comp_dir
, lh
, objfile
);
16365 case DW_MACRO_GNU_end_file
:
16366 /* No data to skip by MAC_PTR. */
16369 case DW_MACRO_GNU_define_indirect
:
16370 case DW_MACRO_GNU_undef_indirect
:
16372 unsigned int bytes_read
;
16374 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16375 mac_ptr
+= bytes_read
;
16376 mac_ptr
+= offset_size
;
16380 case DW_MACRO_GNU_transparent_include
:
16381 /* Note that, according to the spec, a transparent include
16382 chain cannot call DW_MACRO_GNU_start_file. So, we can just
16383 skip this opcode. */
16384 mac_ptr
+= offset_size
;
16387 case DW_MACINFO_vendor_ext
:
16388 /* Only skip the data by MAC_PTR. */
16389 if (!section_is_gnu
)
16391 unsigned int bytes_read
;
16393 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16394 mac_ptr
+= bytes_read
;
16395 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16396 mac_ptr
+= bytes_read
;
16401 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
16402 mac_ptr
, mac_end
, abfd
, offset_size
,
16404 if (mac_ptr
== NULL
)
16408 } while (macinfo_type
!= 0 && current_file
== NULL
);
16410 /* Second pass: Process all entries.
16412 Use the AT_COMMAND_LINE flag to determine whether we are still processing
16413 command-line macro definitions/undefinitions. This flag is unset when we
16414 reach the first DW_MACINFO_start_file entry. */
16416 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
16417 NULL
, xcalloc
, xfree
);
16418 cleanup
= make_cleanup_htab_delete (include_hash
);
16419 mac_ptr
= section
->buffer
+ offset
;
16420 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
16422 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
16423 current_file
, lh
, comp_dir
, section
, section_is_gnu
,
16424 offset_size
, objfile
, include_hash
);
16425 do_cleanups (cleanup
);
16428 /* Check if the attribute's form is a DW_FORM_block*
16429 if so return true else false. */
16432 attr_form_is_block (struct attribute
*attr
)
16434 return (attr
== NULL
? 0 :
16435 attr
->form
== DW_FORM_block1
16436 || attr
->form
== DW_FORM_block2
16437 || attr
->form
== DW_FORM_block4
16438 || attr
->form
== DW_FORM_block
16439 || attr
->form
== DW_FORM_exprloc
);
16442 /* Return non-zero if ATTR's value is a section offset --- classes
16443 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
16444 You may use DW_UNSND (attr) to retrieve such offsets.
16446 Section 7.5.4, "Attribute Encodings", explains that no attribute
16447 may have a value that belongs to more than one of these classes; it
16448 would be ambiguous if we did, because we use the same forms for all
16452 attr_form_is_section_offset (struct attribute
*attr
)
16454 return (attr
->form
== DW_FORM_data4
16455 || attr
->form
== DW_FORM_data8
16456 || attr
->form
== DW_FORM_sec_offset
);
16459 /* Return non-zero if ATTR's value falls in the 'constant' class, or
16460 zero otherwise. When this function returns true, you can apply
16461 dwarf2_get_attr_constant_value to it.
16463 However, note that for some attributes you must check
16464 attr_form_is_section_offset before using this test. DW_FORM_data4
16465 and DW_FORM_data8 are members of both the constant class, and of
16466 the classes that contain offsets into other debug sections
16467 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
16468 that, if an attribute's can be either a constant or one of the
16469 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
16470 taken as section offsets, not constants. */
16473 attr_form_is_constant (struct attribute
*attr
)
16475 switch (attr
->form
)
16477 case DW_FORM_sdata
:
16478 case DW_FORM_udata
:
16479 case DW_FORM_data1
:
16480 case DW_FORM_data2
:
16481 case DW_FORM_data4
:
16482 case DW_FORM_data8
:
16489 /* Return the .debug_loc section to use for CU.
16490 For DWO files use .debug_loc.dwo. */
16492 static struct dwarf2_section_info
*
16493 cu_debug_loc_section (struct dwarf2_cu
*cu
)
16496 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
16497 return &dwarf2_per_objfile
->loc
;
16500 /* A helper function that fills in a dwarf2_loclist_baton. */
16503 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
16504 struct dwarf2_loclist_baton
*baton
,
16505 struct attribute
*attr
)
16507 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
16509 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
16511 baton
->per_cu
= cu
->per_cu
;
16512 gdb_assert (baton
->per_cu
);
16513 /* We don't know how long the location list is, but make sure we
16514 don't run off the edge of the section. */
16515 baton
->size
= section
->size
- DW_UNSND (attr
);
16516 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
16517 baton
->base_address
= cu
->base_address
;
16518 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
16522 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
16523 struct dwarf2_cu
*cu
)
16525 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16526 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
16528 if (attr_form_is_section_offset (attr
)
16529 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
16530 the section. If so, fall through to the complaint in the
16532 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
16534 struct dwarf2_loclist_baton
*baton
;
16536 baton
= obstack_alloc (&objfile
->objfile_obstack
,
16537 sizeof (struct dwarf2_loclist_baton
));
16539 fill_in_loclist_baton (cu
, baton
, attr
);
16541 if (cu
->base_known
== 0)
16542 complaint (&symfile_complaints
,
16543 _("Location list used without "
16544 "specifying the CU base address."));
16546 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
16547 SYMBOL_LOCATION_BATON (sym
) = baton
;
16551 struct dwarf2_locexpr_baton
*baton
;
16553 baton
= obstack_alloc (&objfile
->objfile_obstack
,
16554 sizeof (struct dwarf2_locexpr_baton
));
16555 baton
->per_cu
= cu
->per_cu
;
16556 gdb_assert (baton
->per_cu
);
16558 if (attr_form_is_block (attr
))
16560 /* Note that we're just copying the block's data pointer
16561 here, not the actual data. We're still pointing into the
16562 info_buffer for SYM's objfile; right now we never release
16563 that buffer, but when we do clean up properly this may
16565 baton
->size
= DW_BLOCK (attr
)->size
;
16566 baton
->data
= DW_BLOCK (attr
)->data
;
16570 dwarf2_invalid_attrib_class_complaint ("location description",
16571 SYMBOL_NATURAL_NAME (sym
));
16575 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16576 SYMBOL_LOCATION_BATON (sym
) = baton
;
16580 /* Return the OBJFILE associated with the compilation unit CU. If CU
16581 came from a separate debuginfo file, then the master objfile is
16585 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
16587 struct objfile
*objfile
= per_cu
->objfile
;
16589 /* Return the master objfile, so that we can report and look up the
16590 correct file containing this variable. */
16591 if (objfile
->separate_debug_objfile_backlink
)
16592 objfile
= objfile
->separate_debug_objfile_backlink
;
16597 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
16598 (CU_HEADERP is unused in such case) or prepare a temporary copy at
16599 CU_HEADERP first. */
16601 static const struct comp_unit_head
*
16602 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
16603 struct dwarf2_per_cu_data
*per_cu
)
16605 struct objfile
*objfile
;
16606 struct dwarf2_per_objfile
*per_objfile
;
16607 gdb_byte
*info_ptr
;
16610 return &per_cu
->cu
->header
;
16612 objfile
= per_cu
->objfile
;
16613 per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
16614 info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
.sect_off
;
16616 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
16617 read_comp_unit_head (cu_headerp
, info_ptr
, objfile
->obfd
);
16622 /* Return the address size given in the compilation unit header for CU. */
16625 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
16627 struct comp_unit_head cu_header_local
;
16628 const struct comp_unit_head
*cu_headerp
;
16630 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16632 return cu_headerp
->addr_size
;
16635 /* Return the offset size given in the compilation unit header for CU. */
16638 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
16640 struct comp_unit_head cu_header_local
;
16641 const struct comp_unit_head
*cu_headerp
;
16643 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16645 return cu_headerp
->offset_size
;
16648 /* See its dwarf2loc.h declaration. */
16651 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
16653 struct comp_unit_head cu_header_local
;
16654 const struct comp_unit_head
*cu_headerp
;
16656 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16658 if (cu_headerp
->version
== 2)
16659 return cu_headerp
->addr_size
;
16661 return cu_headerp
->offset_size
;
16664 /* Return the text offset of the CU. The returned offset comes from
16665 this CU's objfile. If this objfile came from a separate debuginfo
16666 file, then the offset may be different from the corresponding
16667 offset in the parent objfile. */
16670 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
16672 struct objfile
*objfile
= per_cu
->objfile
;
16674 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
16677 /* Locate the .debug_info compilation unit from CU's objfile which contains
16678 the DIE at OFFSET. Raises an error on failure. */
16680 static struct dwarf2_per_cu_data
*
16681 dwarf2_find_containing_comp_unit (sect_offset offset
,
16682 struct objfile
*objfile
)
16684 struct dwarf2_per_cu_data
*this_cu
;
16688 high
= dwarf2_per_objfile
->n_comp_units
- 1;
16691 int mid
= low
+ (high
- low
) / 2;
16693 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
.sect_off
16694 >= offset
.sect_off
)
16699 gdb_assert (low
== high
);
16700 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
.sect_off
16704 error (_("Dwarf Error: could not find partial DIE containing "
16705 "offset 0x%lx [in module %s]"),
16706 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16708 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
16709 <= offset
.sect_off
);
16710 return dwarf2_per_objfile
->all_comp_units
[low
-1];
16714 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
16715 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
16716 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
16717 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
16718 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
16723 /* Initialize dwarf2_cu CU, owned by PER_CU. */
16726 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
16728 memset (cu
, 0, sizeof (*cu
));
16730 cu
->per_cu
= per_cu
;
16731 cu
->objfile
= per_cu
->objfile
;
16732 obstack_init (&cu
->comp_unit_obstack
);
16735 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
16738 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
16739 enum language pretend_language
)
16741 struct attribute
*attr
;
16743 /* Set the language we're debugging. */
16744 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
16746 set_cu_language (DW_UNSND (attr
), cu
);
16749 cu
->language
= pretend_language
;
16750 cu
->language_defn
= language_def (cu
->language
);
16753 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
16755 cu
->producer
= DW_STRING (attr
);
16758 /* Release one cached compilation unit, CU. We unlink it from the tree
16759 of compilation units, but we don't remove it from the read_in_chain;
16760 the caller is responsible for that.
16761 NOTE: DATA is a void * because this function is also used as a
16762 cleanup routine. */
16765 free_heap_comp_unit (void *data
)
16767 struct dwarf2_cu
*cu
= data
;
16769 gdb_assert (cu
->per_cu
!= NULL
);
16770 cu
->per_cu
->cu
= NULL
;
16773 obstack_free (&cu
->comp_unit_obstack
, NULL
);
16778 /* This cleanup function is passed the address of a dwarf2_cu on the stack
16779 when we're finished with it. We can't free the pointer itself, but be
16780 sure to unlink it from the cache. Also release any associated storage. */
16783 free_stack_comp_unit (void *data
)
16785 struct dwarf2_cu
*cu
= data
;
16787 gdb_assert (cu
->per_cu
!= NULL
);
16788 cu
->per_cu
->cu
= NULL
;
16791 obstack_free (&cu
->comp_unit_obstack
, NULL
);
16792 cu
->partial_dies
= NULL
;
16795 /* Free all cached compilation units. */
16798 free_cached_comp_units (void *data
)
16800 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16802 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16803 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16804 while (per_cu
!= NULL
)
16806 struct dwarf2_per_cu_data
*next_cu
;
16808 next_cu
= per_cu
->cu
->read_in_chain
;
16810 free_heap_comp_unit (per_cu
->cu
);
16811 *last_chain
= next_cu
;
16817 /* Increase the age counter on each cached compilation unit, and free
16818 any that are too old. */
16821 age_cached_comp_units (void)
16823 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16825 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
16826 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16827 while (per_cu
!= NULL
)
16829 per_cu
->cu
->last_used
++;
16830 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
16831 dwarf2_mark (per_cu
->cu
);
16832 per_cu
= per_cu
->cu
->read_in_chain
;
16835 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16836 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16837 while (per_cu
!= NULL
)
16839 struct dwarf2_per_cu_data
*next_cu
;
16841 next_cu
= per_cu
->cu
->read_in_chain
;
16843 if (!per_cu
->cu
->mark
)
16845 free_heap_comp_unit (per_cu
->cu
);
16846 *last_chain
= next_cu
;
16849 last_chain
= &per_cu
->cu
->read_in_chain
;
16855 /* Remove a single compilation unit from the cache. */
16858 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
16860 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16862 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16863 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16864 while (per_cu
!= NULL
)
16866 struct dwarf2_per_cu_data
*next_cu
;
16868 next_cu
= per_cu
->cu
->read_in_chain
;
16870 if (per_cu
== target_per_cu
)
16872 free_heap_comp_unit (per_cu
->cu
);
16874 *last_chain
= next_cu
;
16878 last_chain
= &per_cu
->cu
->read_in_chain
;
16884 /* Release all extra memory associated with OBJFILE. */
16887 dwarf2_free_objfile (struct objfile
*objfile
)
16889 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
16891 if (dwarf2_per_objfile
== NULL
)
16894 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
16895 free_cached_comp_units (NULL
);
16897 if (dwarf2_per_objfile
->quick_file_names_table
)
16898 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
16900 /* Everything else should be on the objfile obstack. */
16903 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
16904 We store these in a hash table separate from the DIEs, and preserve them
16905 when the DIEs are flushed out of cache.
16907 The CU "per_cu" pointer is needed because offset alone is not enough to
16908 uniquely identify the type. A file may have multiple .debug_types sections,
16909 or the type may come from a DWO file. We have to use something in
16910 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
16911 routine, get_die_type_at_offset, from outside this file, and thus won't
16912 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
16915 struct dwarf2_per_cu_offset_and_type
16917 const struct dwarf2_per_cu_data
*per_cu
;
16918 sect_offset offset
;
16922 /* Hash function for a dwarf2_per_cu_offset_and_type. */
16925 per_cu_offset_and_type_hash (const void *item
)
16927 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
16929 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
16932 /* Equality function for a dwarf2_per_cu_offset_and_type. */
16935 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
16937 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
16938 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
16940 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
16941 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
16944 /* Set the type associated with DIE to TYPE. Save it in CU's hash
16945 table if necessary. For convenience, return TYPE.
16947 The DIEs reading must have careful ordering to:
16948 * Not cause infite loops trying to read in DIEs as a prerequisite for
16949 reading current DIE.
16950 * Not trying to dereference contents of still incompletely read in types
16951 while reading in other DIEs.
16952 * Enable referencing still incompletely read in types just by a pointer to
16953 the type without accessing its fields.
16955 Therefore caller should follow these rules:
16956 * Try to fetch any prerequisite types we may need to build this DIE type
16957 before building the type and calling set_die_type.
16958 * After building type call set_die_type for current DIE as soon as
16959 possible before fetching more types to complete the current type.
16960 * Make the type as complete as possible before fetching more types. */
16962 static struct type
*
16963 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16965 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
16966 struct objfile
*objfile
= cu
->objfile
;
16968 /* For Ada types, make sure that the gnat-specific data is always
16969 initialized (if not already set). There are a few types where
16970 we should not be doing so, because the type-specific area is
16971 already used to hold some other piece of info (eg: TYPE_CODE_FLT
16972 where the type-specific area is used to store the floatformat).
16973 But this is not a problem, because the gnat-specific information
16974 is actually not needed for these types. */
16975 if (need_gnat_info (cu
)
16976 && TYPE_CODE (type
) != TYPE_CODE_FUNC
16977 && TYPE_CODE (type
) != TYPE_CODE_FLT
16978 && !HAVE_GNAT_AUX_INFO (type
))
16979 INIT_GNAT_SPECIFIC (type
);
16981 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
16983 dwarf2_per_objfile
->die_type_hash
=
16984 htab_create_alloc_ex (127,
16985 per_cu_offset_and_type_hash
,
16986 per_cu_offset_and_type_eq
,
16988 &objfile
->objfile_obstack
,
16989 hashtab_obstack_allocate
,
16990 dummy_obstack_deallocate
);
16993 ofs
.per_cu
= cu
->per_cu
;
16994 ofs
.offset
= die
->offset
;
16996 slot
= (struct dwarf2_per_cu_offset_and_type
**)
16997 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
16999 complaint (&symfile_complaints
,
17000 _("A problem internal to GDB: DIE 0x%x has type already set"),
17001 die
->offset
.sect_off
);
17002 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
17007 /* Look up the type for the die at OFFSET in the appropriate type_hash
17008 table, or return NULL if the die does not have a saved type. */
17010 static struct type
*
17011 get_die_type_at_offset (sect_offset offset
,
17012 struct dwarf2_per_cu_data
*per_cu
)
17014 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
17016 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
17019 ofs
.per_cu
= per_cu
;
17020 ofs
.offset
= offset
;
17021 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
17028 /* Look up the type for DIE in the appropriate type_hash table,
17029 or return NULL if DIE does not have a saved type. */
17031 static struct type
*
17032 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17034 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
17037 /* Add a dependence relationship from CU to REF_PER_CU. */
17040 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
17041 struct dwarf2_per_cu_data
*ref_per_cu
)
17045 if (cu
->dependencies
== NULL
)
17047 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
17048 NULL
, &cu
->comp_unit_obstack
,
17049 hashtab_obstack_allocate
,
17050 dummy_obstack_deallocate
);
17052 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
17054 *slot
= ref_per_cu
;
17057 /* Subroutine of dwarf2_mark to pass to htab_traverse.
17058 Set the mark field in every compilation unit in the
17059 cache that we must keep because we are keeping CU. */
17062 dwarf2_mark_helper (void **slot
, void *data
)
17064 struct dwarf2_per_cu_data
*per_cu
;
17066 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
17068 /* cu->dependencies references may not yet have been ever read if QUIT aborts
17069 reading of the chain. As such dependencies remain valid it is not much
17070 useful to track and undo them during QUIT cleanups. */
17071 if (per_cu
->cu
== NULL
)
17074 if (per_cu
->cu
->mark
)
17076 per_cu
->cu
->mark
= 1;
17078 if (per_cu
->cu
->dependencies
!= NULL
)
17079 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
17084 /* Set the mark field in CU and in every other compilation unit in the
17085 cache that we must keep because we are keeping CU. */
17088 dwarf2_mark (struct dwarf2_cu
*cu
)
17093 if (cu
->dependencies
!= NULL
)
17094 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
17098 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
17102 per_cu
->cu
->mark
= 0;
17103 per_cu
= per_cu
->cu
->read_in_chain
;
17107 /* Trivial hash function for partial_die_info: the hash value of a DIE
17108 is its offset in .debug_info for this objfile. */
17111 partial_die_hash (const void *item
)
17113 const struct partial_die_info
*part_die
= item
;
17115 return part_die
->offset
.sect_off
;
17118 /* Trivial comparison function for partial_die_info structures: two DIEs
17119 are equal if they have the same offset. */
17122 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
17124 const struct partial_die_info
*part_die_lhs
= item_lhs
;
17125 const struct partial_die_info
*part_die_rhs
= item_rhs
;
17127 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
17130 static struct cmd_list_element
*set_dwarf2_cmdlist
;
17131 static struct cmd_list_element
*show_dwarf2_cmdlist
;
17134 set_dwarf2_cmd (char *args
, int from_tty
)
17136 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
17140 show_dwarf2_cmd (char *args
, int from_tty
)
17142 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
17145 /* If section described by INFO was mmapped, munmap it now. */
17148 munmap_section_buffer (struct dwarf2_section_info
*info
)
17150 if (info
->map_addr
!= NULL
)
17155 res
= munmap (info
->map_addr
, info
->map_len
);
17156 gdb_assert (res
== 0);
17158 /* Without HAVE_MMAP, we should never be here to begin with. */
17159 gdb_assert_not_reached ("no mmap support");
17164 /* munmap debug sections for OBJFILE, if necessary. */
17167 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
17169 struct dwarf2_per_objfile
*data
= d
;
17171 struct dwarf2_section_info
*section
;
17173 /* This is sorted according to the order they're defined in to make it easier
17174 to keep in sync. */
17175 munmap_section_buffer (&data
->info
);
17176 munmap_section_buffer (&data
->abbrev
);
17177 munmap_section_buffer (&data
->line
);
17178 munmap_section_buffer (&data
->loc
);
17179 munmap_section_buffer (&data
->macinfo
);
17180 munmap_section_buffer (&data
->macro
);
17181 munmap_section_buffer (&data
->str
);
17182 munmap_section_buffer (&data
->ranges
);
17183 munmap_section_buffer (&data
->addr
);
17184 munmap_section_buffer (&data
->frame
);
17185 munmap_section_buffer (&data
->eh_frame
);
17186 munmap_section_buffer (&data
->gdb_index
);
17189 VEC_iterate (dwarf2_section_info_def
, data
->types
, ix
, section
);
17191 munmap_section_buffer (section
);
17193 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
17194 VEC_free (dwarf2_per_cu_ptr
,
17195 dwarf2_per_objfile
->all_comp_units
[ix
]->imported_symtabs
);
17197 VEC_free (dwarf2_section_info_def
, data
->types
);
17199 if (data
->dwo_files
)
17200 free_dwo_files (data
->dwo_files
, objfile
);
17204 /* The "save gdb-index" command. */
17206 /* The contents of the hash table we create when building the string
17208 struct strtab_entry
17210 offset_type offset
;
17214 /* Hash function for a strtab_entry.
17216 Function is used only during write_hash_table so no index format backward
17217 compatibility is needed. */
17220 hash_strtab_entry (const void *e
)
17222 const struct strtab_entry
*entry
= e
;
17223 return mapped_index_string_hash (INT_MAX
, entry
->str
);
17226 /* Equality function for a strtab_entry. */
17229 eq_strtab_entry (const void *a
, const void *b
)
17231 const struct strtab_entry
*ea
= a
;
17232 const struct strtab_entry
*eb
= b
;
17233 return !strcmp (ea
->str
, eb
->str
);
17236 /* Create a strtab_entry hash table. */
17239 create_strtab (void)
17241 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
17242 xfree
, xcalloc
, xfree
);
17245 /* Add a string to the constant pool. Return the string's offset in
17249 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
17252 struct strtab_entry entry
;
17253 struct strtab_entry
*result
;
17256 slot
= htab_find_slot (table
, &entry
, INSERT
);
17261 result
= XNEW (struct strtab_entry
);
17262 result
->offset
= obstack_object_size (cpool
);
17264 obstack_grow_str0 (cpool
, str
);
17267 return result
->offset
;
17270 /* An entry in the symbol table. */
17271 struct symtab_index_entry
17273 /* The name of the symbol. */
17275 /* The offset of the name in the constant pool. */
17276 offset_type index_offset
;
17277 /* A sorted vector of the indices of all the CUs that hold an object
17279 VEC (offset_type
) *cu_indices
;
17282 /* The symbol table. This is a power-of-2-sized hash table. */
17283 struct mapped_symtab
17285 offset_type n_elements
;
17287 struct symtab_index_entry
**data
;
17290 /* Hash function for a symtab_index_entry. */
17293 hash_symtab_entry (const void *e
)
17295 const struct symtab_index_entry
*entry
= e
;
17296 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
17297 sizeof (offset_type
) * VEC_length (offset_type
,
17298 entry
->cu_indices
),
17302 /* Equality function for a symtab_index_entry. */
17305 eq_symtab_entry (const void *a
, const void *b
)
17307 const struct symtab_index_entry
*ea
= a
;
17308 const struct symtab_index_entry
*eb
= b
;
17309 int len
= VEC_length (offset_type
, ea
->cu_indices
);
17310 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
17312 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
17313 VEC_address (offset_type
, eb
->cu_indices
),
17314 sizeof (offset_type
) * len
);
17317 /* Destroy a symtab_index_entry. */
17320 delete_symtab_entry (void *p
)
17322 struct symtab_index_entry
*entry
= p
;
17323 VEC_free (offset_type
, entry
->cu_indices
);
17327 /* Create a hash table holding symtab_index_entry objects. */
17330 create_symbol_hash_table (void)
17332 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
17333 delete_symtab_entry
, xcalloc
, xfree
);
17336 /* Create a new mapped symtab object. */
17338 static struct mapped_symtab
*
17339 create_mapped_symtab (void)
17341 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
17342 symtab
->n_elements
= 0;
17343 symtab
->size
= 1024;
17344 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
17348 /* Destroy a mapped_symtab. */
17351 cleanup_mapped_symtab (void *p
)
17353 struct mapped_symtab
*symtab
= p
;
17354 /* The contents of the array are freed when the other hash table is
17356 xfree (symtab
->data
);
17360 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
17363 Function is used only during write_hash_table so no index format backward
17364 compatibility is needed. */
17366 static struct symtab_index_entry
**
17367 find_slot (struct mapped_symtab
*symtab
, const char *name
)
17369 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
17371 index
= hash
& (symtab
->size
- 1);
17372 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
17376 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
17377 return &symtab
->data
[index
];
17378 index
= (index
+ step
) & (symtab
->size
- 1);
17382 /* Expand SYMTAB's hash table. */
17385 hash_expand (struct mapped_symtab
*symtab
)
17387 offset_type old_size
= symtab
->size
;
17389 struct symtab_index_entry
**old_entries
= symtab
->data
;
17392 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
17394 for (i
= 0; i
< old_size
; ++i
)
17396 if (old_entries
[i
])
17398 struct symtab_index_entry
**slot
= find_slot (symtab
,
17399 old_entries
[i
]->name
);
17400 *slot
= old_entries
[i
];
17404 xfree (old_entries
);
17407 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
17408 is the index of the CU in which the symbol appears. */
17411 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
17412 offset_type cu_index
)
17414 struct symtab_index_entry
**slot
;
17416 ++symtab
->n_elements
;
17417 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
17418 hash_expand (symtab
);
17420 slot
= find_slot (symtab
, name
);
17423 *slot
= XNEW (struct symtab_index_entry
);
17424 (*slot
)->name
= name
;
17425 (*slot
)->cu_indices
= NULL
;
17427 /* Don't push an index twice. Due to how we add entries we only
17428 have to check the last one. */
17429 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
17430 || VEC_last (offset_type
, (*slot
)->cu_indices
) != cu_index
)
17431 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
17434 /* Add a vector of indices to the constant pool. */
17437 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
17438 struct symtab_index_entry
*entry
)
17442 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
17445 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
17446 offset_type val
= MAYBE_SWAP (len
);
17451 entry
->index_offset
= obstack_object_size (cpool
);
17453 obstack_grow (cpool
, &val
, sizeof (val
));
17455 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
17458 val
= MAYBE_SWAP (iter
);
17459 obstack_grow (cpool
, &val
, sizeof (val
));
17464 struct symtab_index_entry
*old_entry
= *slot
;
17465 entry
->index_offset
= old_entry
->index_offset
;
17468 return entry
->index_offset
;
17471 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
17472 constant pool entries going into the obstack CPOOL. */
17475 write_hash_table (struct mapped_symtab
*symtab
,
17476 struct obstack
*output
, struct obstack
*cpool
)
17479 htab_t symbol_hash_table
;
17482 symbol_hash_table
= create_symbol_hash_table ();
17483 str_table
= create_strtab ();
17485 /* We add all the index vectors to the constant pool first, to
17486 ensure alignment is ok. */
17487 for (i
= 0; i
< symtab
->size
; ++i
)
17489 if (symtab
->data
[i
])
17490 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
17493 /* Now write out the hash table. */
17494 for (i
= 0; i
< symtab
->size
; ++i
)
17496 offset_type str_off
, vec_off
;
17498 if (symtab
->data
[i
])
17500 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
17501 vec_off
= symtab
->data
[i
]->index_offset
;
17505 /* While 0 is a valid constant pool index, it is not valid
17506 to have 0 for both offsets. */
17511 str_off
= MAYBE_SWAP (str_off
);
17512 vec_off
= MAYBE_SWAP (vec_off
);
17514 obstack_grow (output
, &str_off
, sizeof (str_off
));
17515 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
17518 htab_delete (str_table
);
17519 htab_delete (symbol_hash_table
);
17522 /* Struct to map psymtab to CU index in the index file. */
17523 struct psymtab_cu_index_map
17525 struct partial_symtab
*psymtab
;
17526 unsigned int cu_index
;
17530 hash_psymtab_cu_index (const void *item
)
17532 const struct psymtab_cu_index_map
*map
= item
;
17534 return htab_hash_pointer (map
->psymtab
);
17538 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
17540 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
17541 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
17543 return lhs
->psymtab
== rhs
->psymtab
;
17546 /* Helper struct for building the address table. */
17547 struct addrmap_index_data
17549 struct objfile
*objfile
;
17550 struct obstack
*addr_obstack
;
17551 htab_t cu_index_htab
;
17553 /* Non-zero if the previous_* fields are valid.
17554 We can't write an entry until we see the next entry (since it is only then
17555 that we know the end of the entry). */
17556 int previous_valid
;
17557 /* Index of the CU in the table of all CUs in the index file. */
17558 unsigned int previous_cu_index
;
17559 /* Start address of the CU. */
17560 CORE_ADDR previous_cu_start
;
17563 /* Write an address entry to OBSTACK. */
17566 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
17567 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
17569 offset_type cu_index_to_write
;
17571 CORE_ADDR baseaddr
;
17573 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17575 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
17576 obstack_grow (obstack
, addr
, 8);
17577 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
17578 obstack_grow (obstack
, addr
, 8);
17579 cu_index_to_write
= MAYBE_SWAP (cu_index
);
17580 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
17583 /* Worker function for traversing an addrmap to build the address table. */
17586 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
17588 struct addrmap_index_data
*data
= datap
;
17589 struct partial_symtab
*pst
= obj
;
17591 if (data
->previous_valid
)
17592 add_address_entry (data
->objfile
, data
->addr_obstack
,
17593 data
->previous_cu_start
, start_addr
,
17594 data
->previous_cu_index
);
17596 data
->previous_cu_start
= start_addr
;
17599 struct psymtab_cu_index_map find_map
, *map
;
17600 find_map
.psymtab
= pst
;
17601 map
= htab_find (data
->cu_index_htab
, &find_map
);
17602 gdb_assert (map
!= NULL
);
17603 data
->previous_cu_index
= map
->cu_index
;
17604 data
->previous_valid
= 1;
17607 data
->previous_valid
= 0;
17612 /* Write OBJFILE's address map to OBSTACK.
17613 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
17614 in the index file. */
17617 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
17618 htab_t cu_index_htab
)
17620 struct addrmap_index_data addrmap_index_data
;
17622 /* When writing the address table, we have to cope with the fact that
17623 the addrmap iterator only provides the start of a region; we have to
17624 wait until the next invocation to get the start of the next region. */
17626 addrmap_index_data
.objfile
= objfile
;
17627 addrmap_index_data
.addr_obstack
= obstack
;
17628 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
17629 addrmap_index_data
.previous_valid
= 0;
17631 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
17632 &addrmap_index_data
);
17634 /* It's highly unlikely the last entry (end address = 0xff...ff)
17635 is valid, but we should still handle it.
17636 The end address is recorded as the start of the next region, but that
17637 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
17639 if (addrmap_index_data
.previous_valid
)
17640 add_address_entry (objfile
, obstack
,
17641 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
17642 addrmap_index_data
.previous_cu_index
);
17645 /* Add a list of partial symbols to SYMTAB. */
17648 write_psymbols (struct mapped_symtab
*symtab
,
17650 struct partial_symbol
**psymp
,
17652 offset_type cu_index
,
17655 for (; count
-- > 0; ++psymp
)
17657 void **slot
, *lookup
;
17659 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
17660 error (_("Ada is not currently supported by the index"));
17662 /* We only want to add a given psymbol once. However, we also
17663 want to account for whether it is global or static. So, we
17664 may add it twice, using slightly different values. */
17667 uintptr_t val
= 1 | (uintptr_t) *psymp
;
17669 lookup
= (void *) val
;
17674 /* Only add a given psymbol once. */
17675 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
17679 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (*psymp
), cu_index
);
17684 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
17685 exception if there is an error. */
17688 write_obstack (FILE *file
, struct obstack
*obstack
)
17690 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
17692 != obstack_object_size (obstack
))
17693 error (_("couldn't data write to file"));
17696 /* Unlink a file if the argument is not NULL. */
17699 unlink_if_set (void *p
)
17701 char **filename
= p
;
17703 unlink (*filename
);
17706 /* A helper struct used when iterating over debug_types. */
17707 struct signatured_type_index_data
17709 struct objfile
*objfile
;
17710 struct mapped_symtab
*symtab
;
17711 struct obstack
*types_list
;
17716 /* A helper function that writes a single signatured_type to an
17720 write_one_signatured_type (void **slot
, void *d
)
17722 struct signatured_type_index_data
*info
= d
;
17723 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
17724 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
17725 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
17728 write_psymbols (info
->symtab
,
17730 info
->objfile
->global_psymbols
.list
17731 + psymtab
->globals_offset
,
17732 psymtab
->n_global_syms
, info
->cu_index
,
17734 write_psymbols (info
->symtab
,
17736 info
->objfile
->static_psymbols
.list
17737 + psymtab
->statics_offset
,
17738 psymtab
->n_static_syms
, info
->cu_index
,
17741 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
17742 entry
->per_cu
.offset
.sect_off
);
17743 obstack_grow (info
->types_list
, val
, 8);
17744 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
17745 entry
->type_offset_in_tu
.cu_off
);
17746 obstack_grow (info
->types_list
, val
, 8);
17747 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
17748 obstack_grow (info
->types_list
, val
, 8);
17755 /* Recurse into all "included" dependencies and write their symbols as
17756 if they appeared in this psymtab. */
17759 recursively_write_psymbols (struct objfile
*objfile
,
17760 struct partial_symtab
*psymtab
,
17761 struct mapped_symtab
*symtab
,
17763 offset_type cu_index
)
17767 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
17768 if (psymtab
->dependencies
[i
]->user
!= NULL
)
17769 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
17770 symtab
, psyms_seen
, cu_index
);
17772 write_psymbols (symtab
,
17774 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
17775 psymtab
->n_global_syms
, cu_index
,
17777 write_psymbols (symtab
,
17779 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
17780 psymtab
->n_static_syms
, cu_index
,
17784 /* Create an index file for OBJFILE in the directory DIR. */
17787 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
17789 struct cleanup
*cleanup
;
17790 char *filename
, *cleanup_filename
;
17791 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
17792 struct obstack cu_list
, types_cu_list
;
17795 struct mapped_symtab
*symtab
;
17796 offset_type val
, size_of_contents
, total_len
;
17799 htab_t cu_index_htab
;
17800 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
17802 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
17805 if (dwarf2_per_objfile
->using_index
)
17806 error (_("Cannot use an index to create the index"));
17808 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
17809 error (_("Cannot make an index when the file has multiple .debug_types sections"));
17811 if (stat (objfile
->name
, &st
) < 0)
17812 perror_with_name (objfile
->name
);
17814 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
17815 INDEX_SUFFIX
, (char *) NULL
);
17816 cleanup
= make_cleanup (xfree
, filename
);
17818 out_file
= fopen (filename
, "wb");
17820 error (_("Can't open `%s' for writing"), filename
);
17822 cleanup_filename
= filename
;
17823 make_cleanup (unlink_if_set
, &cleanup_filename
);
17825 symtab
= create_mapped_symtab ();
17826 make_cleanup (cleanup_mapped_symtab
, symtab
);
17828 obstack_init (&addr_obstack
);
17829 make_cleanup_obstack_free (&addr_obstack
);
17831 obstack_init (&cu_list
);
17832 make_cleanup_obstack_free (&cu_list
);
17834 obstack_init (&types_cu_list
);
17835 make_cleanup_obstack_free (&types_cu_list
);
17837 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
17838 NULL
, xcalloc
, xfree
);
17839 make_cleanup_htab_delete (psyms_seen
);
17841 /* While we're scanning CU's create a table that maps a psymtab pointer
17842 (which is what addrmap records) to its index (which is what is recorded
17843 in the index file). This will later be needed to write the address
17845 cu_index_htab
= htab_create_alloc (100,
17846 hash_psymtab_cu_index
,
17847 eq_psymtab_cu_index
,
17848 NULL
, xcalloc
, xfree
);
17849 make_cleanup_htab_delete (cu_index_htab
);
17850 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
17851 xmalloc (sizeof (struct psymtab_cu_index_map
)
17852 * dwarf2_per_objfile
->n_comp_units
);
17853 make_cleanup (xfree
, psymtab_cu_index_map
);
17855 /* The CU list is already sorted, so we don't need to do additional
17856 work here. Also, the debug_types entries do not appear in
17857 all_comp_units, but only in their own hash table. */
17858 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
17860 struct dwarf2_per_cu_data
*per_cu
17861 = dwarf2_per_objfile
->all_comp_units
[i
];
17862 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
17864 struct psymtab_cu_index_map
*map
;
17867 if (psymtab
->user
== NULL
)
17868 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
17870 map
= &psymtab_cu_index_map
[i
];
17871 map
->psymtab
= psymtab
;
17873 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
17874 gdb_assert (slot
!= NULL
);
17875 gdb_assert (*slot
== NULL
);
17878 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
17879 per_cu
->offset
.sect_off
);
17880 obstack_grow (&cu_list
, val
, 8);
17881 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
17882 obstack_grow (&cu_list
, val
, 8);
17885 /* Dump the address map. */
17886 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
17888 /* Write out the .debug_type entries, if any. */
17889 if (dwarf2_per_objfile
->signatured_types
)
17891 struct signatured_type_index_data sig_data
;
17893 sig_data
.objfile
= objfile
;
17894 sig_data
.symtab
= symtab
;
17895 sig_data
.types_list
= &types_cu_list
;
17896 sig_data
.psyms_seen
= psyms_seen
;
17897 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
17898 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
17899 write_one_signatured_type
, &sig_data
);
17902 obstack_init (&constant_pool
);
17903 make_cleanup_obstack_free (&constant_pool
);
17904 obstack_init (&symtab_obstack
);
17905 make_cleanup_obstack_free (&symtab_obstack
);
17906 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
17908 obstack_init (&contents
);
17909 make_cleanup_obstack_free (&contents
);
17910 size_of_contents
= 6 * sizeof (offset_type
);
17911 total_len
= size_of_contents
;
17913 /* The version number. */
17914 val
= MAYBE_SWAP (6);
17915 obstack_grow (&contents
, &val
, sizeof (val
));
17917 /* The offset of the CU list from the start of the file. */
17918 val
= MAYBE_SWAP (total_len
);
17919 obstack_grow (&contents
, &val
, sizeof (val
));
17920 total_len
+= obstack_object_size (&cu_list
);
17922 /* The offset of the types CU list from the start of the file. */
17923 val
= MAYBE_SWAP (total_len
);
17924 obstack_grow (&contents
, &val
, sizeof (val
));
17925 total_len
+= obstack_object_size (&types_cu_list
);
17927 /* The offset of the address table from the start of the file. */
17928 val
= MAYBE_SWAP (total_len
);
17929 obstack_grow (&contents
, &val
, sizeof (val
));
17930 total_len
+= obstack_object_size (&addr_obstack
);
17932 /* The offset of the symbol table from the start of the file. */
17933 val
= MAYBE_SWAP (total_len
);
17934 obstack_grow (&contents
, &val
, sizeof (val
));
17935 total_len
+= obstack_object_size (&symtab_obstack
);
17937 /* The offset of the constant pool from the start of the file. */
17938 val
= MAYBE_SWAP (total_len
);
17939 obstack_grow (&contents
, &val
, sizeof (val
));
17940 total_len
+= obstack_object_size (&constant_pool
);
17942 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
17944 write_obstack (out_file
, &contents
);
17945 write_obstack (out_file
, &cu_list
);
17946 write_obstack (out_file
, &types_cu_list
);
17947 write_obstack (out_file
, &addr_obstack
);
17948 write_obstack (out_file
, &symtab_obstack
);
17949 write_obstack (out_file
, &constant_pool
);
17953 /* We want to keep the file, so we set cleanup_filename to NULL
17954 here. See unlink_if_set. */
17955 cleanup_filename
= NULL
;
17957 do_cleanups (cleanup
);
17960 /* Implementation of the `save gdb-index' command.
17962 Note that the file format used by this command is documented in the
17963 GDB manual. Any changes here must be documented there. */
17966 save_gdb_index_command (char *arg
, int from_tty
)
17968 struct objfile
*objfile
;
17971 error (_("usage: save gdb-index DIRECTORY"));
17973 ALL_OBJFILES (objfile
)
17977 /* If the objfile does not correspond to an actual file, skip it. */
17978 if (stat (objfile
->name
, &st
) < 0)
17981 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
17982 if (dwarf2_per_objfile
)
17984 volatile struct gdb_exception except
;
17986 TRY_CATCH (except
, RETURN_MASK_ERROR
)
17988 write_psymtabs_to_index (objfile
, arg
);
17990 if (except
.reason
< 0)
17991 exception_fprintf (gdb_stderr
, except
,
17992 _("Error while writing index for `%s': "),
18000 int dwarf2_always_disassemble
;
18003 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
18004 struct cmd_list_element
*c
, const char *value
)
18006 fprintf_filtered (file
,
18007 _("Whether to always disassemble "
18008 "DWARF expressions is %s.\n"),
18013 show_check_physname (struct ui_file
*file
, int from_tty
,
18014 struct cmd_list_element
*c
, const char *value
)
18016 fprintf_filtered (file
,
18017 _("Whether to check \"physname\" is %s.\n"),
18021 void _initialize_dwarf2_read (void);
18024 _initialize_dwarf2_read (void)
18026 struct cmd_list_element
*c
;
18028 dwarf2_objfile_data_key
18029 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
18031 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
18032 Set DWARF 2 specific variables.\n\
18033 Configure DWARF 2 variables such as the cache size"),
18034 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
18035 0/*allow-unknown*/, &maintenance_set_cmdlist
);
18037 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
18038 Show DWARF 2 specific variables\n\
18039 Show DWARF 2 variables such as the cache size"),
18040 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
18041 0/*allow-unknown*/, &maintenance_show_cmdlist
);
18043 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
18044 &dwarf2_max_cache_age
, _("\
18045 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
18046 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
18047 A higher limit means that cached compilation units will be stored\n\
18048 in memory longer, and more total memory will be used. Zero disables\n\
18049 caching, which can slow down startup."),
18051 show_dwarf2_max_cache_age
,
18052 &set_dwarf2_cmdlist
,
18053 &show_dwarf2_cmdlist
);
18055 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
18056 &dwarf2_always_disassemble
, _("\
18057 Set whether `info address' always disassembles DWARF expressions."), _("\
18058 Show whether `info address' always disassembles DWARF expressions."), _("\
18059 When enabled, DWARF expressions are always printed in an assembly-like\n\
18060 syntax. When disabled, expressions will be printed in a more\n\
18061 conversational style, when possible."),
18063 show_dwarf2_always_disassemble
,
18064 &set_dwarf2_cmdlist
,
18065 &show_dwarf2_cmdlist
);
18067 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
18068 Set debugging of the dwarf2 DIE reader."), _("\
18069 Show debugging of the dwarf2 DIE reader."), _("\
18070 When enabled (non-zero), DIEs are dumped after they are read in.\n\
18071 The value is the maximum depth to print."),
18074 &setdebuglist
, &showdebuglist
);
18076 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
18077 Set cross-checking of \"physname\" code against demangler."), _("\
18078 Show cross-checking of \"physname\" code against demangler."), _("\
18079 When enabled, GDB's internal \"physname\" code is checked against\n\
18081 NULL
, show_check_physname
,
18082 &setdebuglist
, &showdebuglist
);
18084 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
18086 Save a gdb-index file.\n\
18087 Usage: save gdb-index DIRECTORY"),
18089 set_cmd_completer (c
, filename_completer
);