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"
66 #include "gdb_string.h"
67 #include "gdb_assert.h"
68 #include <sys/types.h>
75 #define MAP_FAILED ((void *) -1)
79 typedef struct symbol
*symbolp
;
82 /* When non-zero, dump DIEs after they are read in. */
83 static int dwarf2_die_debug
= 0;
85 /* When non-zero, cross-check physname against demangler. */
86 static int check_physname
= 0;
90 /* When set, the file that we're processing is known to have debugging
91 info for C++ namespaces. GCC 3.3.x did not produce this information,
92 but later versions do. */
94 static int processing_has_namespace_info
;
96 static const struct objfile_data
*dwarf2_objfile_data_key
;
98 struct dwarf2_section_info
103 /* Not NULL if the section was actually mmapped. */
105 /* Page aligned size of mmapped area. */
106 bfd_size_type map_len
;
107 /* True if we have tried to read this section. */
111 typedef struct dwarf2_section_info dwarf2_section_info_def
;
112 DEF_VEC_O (dwarf2_section_info_def
);
114 /* All offsets in the index are of this type. It must be
115 architecture-independent. */
116 typedef uint32_t offset_type
;
118 DEF_VEC_I (offset_type
);
120 /* A description of the mapped index. The file format is described in
121 a comment by the code that writes the index. */
124 /* Index data format version. */
127 /* The total length of the buffer. */
130 /* A pointer to the address table data. */
131 const gdb_byte
*address_table
;
133 /* Size of the address table data in bytes. */
134 offset_type address_table_size
;
136 /* The symbol table, implemented as a hash table. */
137 const offset_type
*symbol_table
;
139 /* Size in slots, each slot is 2 offset_types. */
140 offset_type symbol_table_slots
;
142 /* A pointer to the constant pool. */
143 const char *constant_pool
;
146 /* Collection of data recorded per objfile.
147 This hangs off of dwarf2_objfile_data_key. */
149 struct dwarf2_per_objfile
151 struct dwarf2_section_info info
;
152 struct dwarf2_section_info abbrev
;
153 struct dwarf2_section_info line
;
154 struct dwarf2_section_info loc
;
155 struct dwarf2_section_info macinfo
;
156 struct dwarf2_section_info macro
;
157 struct dwarf2_section_info str
;
158 struct dwarf2_section_info ranges
;
159 struct dwarf2_section_info frame
;
160 struct dwarf2_section_info eh_frame
;
161 struct dwarf2_section_info gdb_index
;
163 VEC (dwarf2_section_info_def
) *types
;
166 struct objfile
*objfile
;
168 /* Table of all the compilation units. This is used to locate
169 the target compilation unit of a particular reference. */
170 struct dwarf2_per_cu_data
**all_comp_units
;
172 /* The number of compilation units in ALL_COMP_UNITS. */
175 /* The number of .debug_types-related CUs. */
178 /* The .debug_types-related CUs (TUs). */
179 struct dwarf2_per_cu_data
**all_type_units
;
181 /* A chain of compilation units that are currently read in, so that
182 they can be freed later. */
183 struct dwarf2_per_cu_data
*read_in_chain
;
185 /* A table mapping .debug_types signatures to its signatured_type entry.
186 This is NULL if the .debug_types section hasn't been read in yet. */
187 htab_t signatured_types
;
189 /* A flag indicating wether this objfile has a section loaded at a
191 int has_section_at_zero
;
193 /* True if we are using the mapped index,
194 or we are faking it for OBJF_READNOW's sake. */
195 unsigned char using_index
;
197 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
198 struct mapped_index
*index_table
;
200 /* When using index_table, this keeps track of all quick_file_names entries.
201 TUs can share line table entries with CUs or other TUs, and there can be
202 a lot more TUs than unique line tables, so we maintain a separate table
203 of all line table entries to support the sharing. */
204 htab_t quick_file_names_table
;
206 /* Set during partial symbol reading, to prevent queueing of full
208 int reading_partial_symbols
;
210 /* Table mapping type .debug_info DIE offsets to types.
211 This is NULL if not allocated yet.
212 It (currently) makes sense to allocate debug_types_type_hash lazily.
213 To keep things simple we allocate both lazily. */
214 htab_t debug_info_type_hash
;
216 /* Table mapping type .debug_types DIE offsets to types.
217 This is NULL if not allocated yet. */
218 htab_t debug_types_type_hash
;
221 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
223 /* Default names of the debugging sections. */
225 /* Note that if the debugging section has been compressed, it might
226 have a name like .zdebug_info. */
228 static const struct dwarf2_debug_sections dwarf2_elf_names
=
230 { ".debug_info", ".zdebug_info" },
231 { ".debug_abbrev", ".zdebug_abbrev" },
232 { ".debug_line", ".zdebug_line" },
233 { ".debug_loc", ".zdebug_loc" },
234 { ".debug_macinfo", ".zdebug_macinfo" },
235 { ".debug_macro", ".zdebug_macro" },
236 { ".debug_str", ".zdebug_str" },
237 { ".debug_ranges", ".zdebug_ranges" },
238 { ".debug_types", ".zdebug_types" },
239 { ".debug_frame", ".zdebug_frame" },
240 { ".eh_frame", NULL
},
241 { ".gdb_index", ".zgdb_index" },
245 /* local data types */
247 /* We hold several abbreviation tables in memory at the same time. */
248 #ifndef ABBREV_HASH_SIZE
249 #define ABBREV_HASH_SIZE 121
252 /* The data in a compilation unit header, after target2host
253 translation, looks like this. */
254 struct comp_unit_head
258 unsigned char addr_size
;
259 unsigned char signed_addr_p
;
260 unsigned int abbrev_offset
;
262 /* Size of file offsets; either 4 or 8. */
263 unsigned int offset_size
;
265 /* Size of the length field; either 4 or 12. */
266 unsigned int initial_length_size
;
268 /* Offset to the first byte of this compilation unit header in the
269 .debug_info section, for resolving relative reference dies. */
272 /* Offset to first die in this cu from the start of the cu.
273 This will be the first byte following the compilation unit header. */
274 unsigned int first_die_offset
;
277 /* Type used for delaying computation of method physnames.
278 See comments for compute_delayed_physnames. */
279 struct delayed_method_info
281 /* The type to which the method is attached, i.e., its parent class. */
284 /* The index of the method in the type's function fieldlists. */
287 /* The index of the method in the fieldlist. */
290 /* The name of the DIE. */
293 /* The DIE associated with this method. */
294 struct die_info
*die
;
297 typedef struct delayed_method_info delayed_method_info
;
298 DEF_VEC_O (delayed_method_info
);
300 /* Internal state when decoding a particular compilation unit. */
303 /* The objfile containing this compilation unit. */
304 struct objfile
*objfile
;
306 /* The header of the compilation unit. */
307 struct comp_unit_head header
;
309 /* Base address of this compilation unit. */
310 CORE_ADDR base_address
;
312 /* Non-zero if base_address has been set. */
315 /* The language we are debugging. */
316 enum language language
;
317 const struct language_defn
*language_defn
;
319 const char *producer
;
321 /* The generic symbol table building routines have separate lists for
322 file scope symbols and all all other scopes (local scopes). So
323 we need to select the right one to pass to add_symbol_to_list().
324 We do it by keeping a pointer to the correct list in list_in_scope.
326 FIXME: The original dwarf code just treated the file scope as the
327 first local scope, and all other local scopes as nested local
328 scopes, and worked fine. Check to see if we really need to
329 distinguish these in buildsym.c. */
330 struct pending
**list_in_scope
;
332 /* DWARF abbreviation table associated with this compilation unit. */
333 struct abbrev_info
**dwarf2_abbrevs
;
335 /* Storage for the abbrev table. */
336 struct obstack abbrev_obstack
;
338 /* Hash table holding all the loaded partial DIEs. */
341 /* Storage for things with the same lifetime as this read-in compilation
342 unit, including partial DIEs. */
343 struct obstack comp_unit_obstack
;
345 /* When multiple dwarf2_cu structures are living in memory, this field
346 chains them all together, so that they can be released efficiently.
347 We will probably also want a generation counter so that most-recently-used
348 compilation units are cached... */
349 struct dwarf2_per_cu_data
*read_in_chain
;
351 /* Backchain to our per_cu entry if the tree has been built. */
352 struct dwarf2_per_cu_data
*per_cu
;
354 /* How many compilation units ago was this CU last referenced? */
357 /* A hash table of die offsets for following references. */
360 /* Full DIEs if read in. */
361 struct die_info
*dies
;
363 /* A set of pointers to dwarf2_per_cu_data objects for compilation
364 units referenced by this one. Only set during full symbol processing;
365 partial symbol tables do not have dependencies. */
368 /* Header data from the line table, during full symbol processing. */
369 struct line_header
*line_header
;
371 /* A list of methods which need to have physnames computed
372 after all type information has been read. */
373 VEC (delayed_method_info
) *method_list
;
375 /* To be copied to symtab->call_site_htab. */
376 htab_t call_site_htab
;
378 /* Mark used when releasing cached dies. */
379 unsigned int mark
: 1;
381 /* This CU references .debug_loc. See the symtab->locations_valid field.
382 This test is imperfect as there may exist optimized debug code not using
383 any location list and still facing inlining issues if handled as
384 unoptimized code. For a future better test see GCC PR other/32998. */
385 unsigned int has_loclist
: 1;
388 /* Persistent data held for a compilation unit, even when not
389 processing it. We put a pointer to this structure in the
390 read_symtab_private field of the psymtab. */
392 struct dwarf2_per_cu_data
394 /* The start offset and length of this compilation unit. 2**29-1
395 bytes should suffice to store the length of any compilation unit
396 - if it doesn't, GDB will fall over anyway.
397 NOTE: Unlike comp_unit_head.length, this length includes
398 initial_length_size. */
400 unsigned int length
: 29;
402 /* Flag indicating this compilation unit will be read in before
403 any of the current compilation units are processed. */
404 unsigned int queued
: 1;
406 /* This flag will be set if we need to load absolutely all DIEs
407 for this compilation unit, instead of just the ones we think
408 are interesting. It gets set if we look for a DIE in the
409 hash table and don't find it. */
410 unsigned int load_all_dies
: 1;
412 /* Non-null if this CU is from .debug_types; in which case it points
413 to the section. Otherwise it's from .debug_info. */
414 struct dwarf2_section_info
*debug_types_section
;
416 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
417 of the CU cache it gets reset to NULL again. */
418 struct dwarf2_cu
*cu
;
420 /* The corresponding objfile.
421 Normally we can get the objfile from dwarf2_per_objfile.
422 However we can enter this file with just a "per_cu" handle. */
423 struct objfile
*objfile
;
425 /* When using partial symbol tables, the 'psymtab' field is active.
426 Otherwise the 'quick' field is active. */
429 /* The partial symbol table associated with this compilation unit,
430 or NULL for partial units (which do not have an associated
432 struct partial_symtab
*psymtab
;
434 /* Data needed by the "quick" functions. */
435 struct dwarf2_per_cu_quick_data
*quick
;
439 /* Entry in the signatured_types hash table. */
441 struct signatured_type
445 /* Offset in .debug_types of the type defined by this TU. */
446 unsigned int type_offset
;
448 /* The CU(/TU) of this type. */
449 struct dwarf2_per_cu_data per_cu
;
452 /* Struct used to pass misc. parameters to read_die_and_children, et
453 al. which are used for both .debug_info and .debug_types dies.
454 All parameters here are unchanging for the life of the call. This
455 struct exists to abstract away the constant parameters of die
458 struct die_reader_specs
460 /* The bfd of this objfile. */
463 /* The CU of the DIE we are parsing. */
464 struct dwarf2_cu
*cu
;
466 /* Pointer to start of section buffer.
467 This is either the start of .debug_info or .debug_types. */
468 const gdb_byte
*buffer
;
471 /* The line number information for a compilation unit (found in the
472 .debug_line section) begins with a "statement program header",
473 which contains the following information. */
476 unsigned int total_length
;
477 unsigned short version
;
478 unsigned int header_length
;
479 unsigned char minimum_instruction_length
;
480 unsigned char maximum_ops_per_instruction
;
481 unsigned char default_is_stmt
;
483 unsigned char line_range
;
484 unsigned char opcode_base
;
486 /* standard_opcode_lengths[i] is the number of operands for the
487 standard opcode whose value is i. This means that
488 standard_opcode_lengths[0] is unused, and the last meaningful
489 element is standard_opcode_lengths[opcode_base - 1]. */
490 unsigned char *standard_opcode_lengths
;
492 /* The include_directories table. NOTE! These strings are not
493 allocated with xmalloc; instead, they are pointers into
494 debug_line_buffer. If you try to free them, `free' will get
496 unsigned int num_include_dirs
, include_dirs_size
;
499 /* The file_names table. NOTE! These strings are not allocated
500 with xmalloc; instead, they are pointers into debug_line_buffer.
501 Don't try to free them directly. */
502 unsigned int num_file_names
, file_names_size
;
506 unsigned int dir_index
;
507 unsigned int mod_time
;
509 int included_p
; /* Non-zero if referenced by the Line Number Program. */
510 struct symtab
*symtab
; /* The associated symbol table, if any. */
513 /* The start and end of the statement program following this
514 header. These point into dwarf2_per_objfile->line_buffer. */
515 gdb_byte
*statement_program_start
, *statement_program_end
;
518 /* When we construct a partial symbol table entry we only
519 need this much information. */
520 struct partial_die_info
522 /* Offset of this DIE. */
525 /* DWARF-2 tag for this DIE. */
526 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
528 /* Assorted flags describing the data found in this DIE. */
529 unsigned int has_children
: 1;
530 unsigned int is_external
: 1;
531 unsigned int is_declaration
: 1;
532 unsigned int has_type
: 1;
533 unsigned int has_specification
: 1;
534 unsigned int has_pc_info
: 1;
536 /* Flag set if the SCOPE field of this structure has been
538 unsigned int scope_set
: 1;
540 /* Flag set if the DIE has a byte_size attribute. */
541 unsigned int has_byte_size
: 1;
543 /* Flag set if any of the DIE's children are template arguments. */
544 unsigned int has_template_arguments
: 1;
546 /* Flag set if fixup_partial_die has been called on this die. */
547 unsigned int fixup_called
: 1;
549 /* The name of this DIE. Normally the value of DW_AT_name, but
550 sometimes a default name for unnamed DIEs. */
553 /* The linkage name, if present. */
554 const char *linkage_name
;
556 /* The scope to prepend to our children. This is generally
557 allocated on the comp_unit_obstack, so will disappear
558 when this compilation unit leaves the cache. */
561 /* The location description associated with this DIE, if any. */
562 struct dwarf_block
*locdesc
;
564 /* If HAS_PC_INFO, the PC range associated with this DIE. */
568 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
569 DW_AT_sibling, if any. */
570 /* NOTE: This member isn't strictly necessary, read_partial_die could
571 return DW_AT_sibling values to its caller load_partial_dies. */
574 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
575 DW_AT_specification (or DW_AT_abstract_origin or
577 unsigned int spec_offset
;
579 /* Pointers to this DIE's parent, first child, and next sibling,
581 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
584 /* This data structure holds the information of an abbrev. */
587 unsigned int number
; /* number identifying abbrev */
588 enum dwarf_tag tag
; /* dwarf tag */
589 unsigned short has_children
; /* boolean */
590 unsigned short num_attrs
; /* number of attributes */
591 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
592 struct abbrev_info
*next
; /* next in chain */
597 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
598 ENUM_BITFIELD(dwarf_form
) form
: 16;
601 /* Attributes have a name and a value. */
604 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
605 ENUM_BITFIELD(dwarf_form
) form
: 15;
607 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
608 field should be in u.str (existing only for DW_STRING) but it is kept
609 here for better struct attribute alignment. */
610 unsigned int string_is_canonical
: 1;
615 struct dwarf_block
*blk
;
619 struct signatured_type
*signatured_type
;
624 /* This data structure holds a complete die structure. */
627 /* DWARF-2 tag for this DIE. */
628 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
630 /* Number of attributes */
631 unsigned char num_attrs
;
633 /* True if we're presently building the full type name for the
634 type derived from this DIE. */
635 unsigned char building_fullname
: 1;
640 /* Offset in .debug_info or .debug_types section. */
643 /* The dies in a compilation unit form an n-ary tree. PARENT
644 points to this die's parent; CHILD points to the first child of
645 this node; and all the children of a given node are chained
646 together via their SIBLING fields. */
647 struct die_info
*child
; /* Its first child, if any. */
648 struct die_info
*sibling
; /* Its next sibling, if any. */
649 struct die_info
*parent
; /* Its parent, if any. */
651 /* An array of attributes, with NUM_ATTRS elements. There may be
652 zero, but it's not common and zero-sized arrays are not
653 sufficiently portable C. */
654 struct attribute attrs
[1];
657 /* Get at parts of an attribute structure. */
659 #define DW_STRING(attr) ((attr)->u.str)
660 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
661 #define DW_UNSND(attr) ((attr)->u.unsnd)
662 #define DW_BLOCK(attr) ((attr)->u.blk)
663 #define DW_SND(attr) ((attr)->u.snd)
664 #define DW_ADDR(attr) ((attr)->u.addr)
665 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
667 /* Blocks are a bunch of untyped bytes. */
672 /* Valid only if SIZE is not zero. */
676 #ifndef ATTR_ALLOC_CHUNK
677 #define ATTR_ALLOC_CHUNK 4
680 /* Allocate fields for structs, unions and enums in this size. */
681 #ifndef DW_FIELD_ALLOC_CHUNK
682 #define DW_FIELD_ALLOC_CHUNK 4
685 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
686 but this would require a corresponding change in unpack_field_as_long
688 static int bits_per_byte
= 8;
690 /* The routines that read and process dies for a C struct or C++ class
691 pass lists of data member fields and lists of member function fields
692 in an instance of a field_info structure, as defined below. */
695 /* List of data member and baseclasses fields. */
698 struct nextfield
*next
;
703 *fields
, *baseclasses
;
705 /* Number of fields (including baseclasses). */
708 /* Number of baseclasses. */
711 /* Set if the accesibility of one of the fields is not public. */
712 int non_public_fields
;
714 /* Member function fields array, entries are allocated in the order they
715 are encountered in the object file. */
718 struct nextfnfield
*next
;
719 struct fn_field fnfield
;
723 /* Member function fieldlist array, contains name of possibly overloaded
724 member function, number of overloaded member functions and a pointer
725 to the head of the member function field chain. */
730 struct nextfnfield
*head
;
734 /* Number of entries in the fnfieldlists array. */
737 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
738 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
739 struct typedef_field_list
741 struct typedef_field field
;
742 struct typedef_field_list
*next
;
745 unsigned typedef_field_list_count
;
748 /* One item on the queue of compilation units to read in full symbols
750 struct dwarf2_queue_item
752 struct dwarf2_per_cu_data
*per_cu
;
753 struct dwarf2_queue_item
*next
;
756 /* The current queue. */
757 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
759 /* Loaded secondary compilation units are kept in memory until they
760 have not been referenced for the processing of this many
761 compilation units. Set this to zero to disable caching. Cache
762 sizes of up to at least twenty will improve startup time for
763 typical inter-CU-reference binaries, at an obvious memory cost. */
764 static int dwarf2_max_cache_age
= 5;
766 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
767 struct cmd_list_element
*c
, const char *value
)
769 fprintf_filtered (file
, _("The upper bound on the age of cached "
770 "dwarf2 compilation units is %s.\n"),
775 /* Various complaints about symbol reading that don't abort the process. */
778 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
780 complaint (&symfile_complaints
,
781 _("statement list doesn't fit in .debug_line section"));
785 dwarf2_debug_line_missing_file_complaint (void)
787 complaint (&symfile_complaints
,
788 _(".debug_line section has line data without a file"));
792 dwarf2_debug_line_missing_end_sequence_complaint (void)
794 complaint (&symfile_complaints
,
795 _(".debug_line section has line "
796 "program sequence without an end"));
800 dwarf2_complex_location_expr_complaint (void)
802 complaint (&symfile_complaints
, _("location expression too complex"));
806 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
809 complaint (&symfile_complaints
,
810 _("const value length mismatch for '%s', got %d, expected %d"),
815 dwarf2_macros_too_long_complaint (struct dwarf2_section_info
*section
)
817 complaint (&symfile_complaints
,
818 _("macro info runs off end of `%s' section"),
819 section
->asection
->name
);
823 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
825 complaint (&symfile_complaints
,
826 _("macro debug info contains a "
827 "malformed macro definition:\n`%s'"),
832 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
834 complaint (&symfile_complaints
,
835 _("invalid attribute class or form for '%s' in '%s'"),
839 /* local function prototypes */
841 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
843 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
846 static void dwarf2_find_base_address (struct die_info
*die
,
847 struct dwarf2_cu
*cu
);
849 static void dwarf2_build_psymtabs_hard (struct objfile
*);
851 static void scan_partial_symbols (struct partial_die_info
*,
852 CORE_ADDR
*, CORE_ADDR
*,
853 int, struct dwarf2_cu
*);
855 static void add_partial_symbol (struct partial_die_info
*,
858 static void add_partial_namespace (struct partial_die_info
*pdi
,
859 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
860 int need_pc
, struct dwarf2_cu
*cu
);
862 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
863 CORE_ADDR
*highpc
, int need_pc
,
864 struct dwarf2_cu
*cu
);
866 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
867 struct dwarf2_cu
*cu
);
869 static void add_partial_subprogram (struct partial_die_info
*pdi
,
870 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
871 int need_pc
, struct dwarf2_cu
*cu
);
873 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
874 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
875 bfd
*abfd
, struct dwarf2_cu
*cu
);
877 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
879 static void psymtab_to_symtab_1 (struct partial_symtab
*);
881 static void dwarf2_read_abbrevs (struct dwarf2_cu
*cu
);
883 static void dwarf2_free_abbrev_table (void *);
885 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
887 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
890 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
893 static struct partial_die_info
*load_partial_dies (bfd
*,
894 gdb_byte
*, gdb_byte
*,
895 int, struct dwarf2_cu
*);
897 static gdb_byte
*read_partial_die (struct partial_die_info
*,
898 struct abbrev_info
*abbrev
,
900 gdb_byte
*, gdb_byte
*,
903 static struct partial_die_info
*find_partial_die (unsigned int,
906 static void fixup_partial_die (struct partial_die_info
*,
909 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
910 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
912 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
913 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
915 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
917 static int read_1_signed_byte (bfd
*, gdb_byte
*);
919 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
921 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
923 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
925 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
928 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
930 static LONGEST read_checked_initial_length_and_offset
931 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
932 unsigned int *, unsigned int *);
934 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
937 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
939 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
941 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
943 static char *read_indirect_string (bfd
*, gdb_byte
*,
944 const struct comp_unit_head
*,
947 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
949 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
951 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
953 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
955 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
958 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
962 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
963 struct dwarf2_cu
*cu
);
965 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
967 static struct die_info
*die_specification (struct die_info
*die
,
968 struct dwarf2_cu
**);
970 static void free_line_header (struct line_header
*lh
);
972 static void add_file_name (struct line_header
*, char *, unsigned int,
973 unsigned int, unsigned int);
975 static struct line_header
*(dwarf_decode_line_header
976 (unsigned int offset
,
977 bfd
*abfd
, struct dwarf2_cu
*cu
));
979 static void dwarf_decode_lines (struct line_header
*, const char *,
980 struct dwarf2_cu
*, struct partial_symtab
*,
983 static void dwarf2_start_subfile (char *, const char *, const char *);
985 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
988 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
989 struct dwarf2_cu
*, struct symbol
*);
991 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
994 static void dwarf2_const_value_attr (struct attribute
*attr
,
997 struct obstack
*obstack
,
998 struct dwarf2_cu
*cu
, long *value
,
1000 struct dwarf2_locexpr_baton
**baton
);
1002 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1004 static int need_gnat_info (struct dwarf2_cu
*);
1006 static struct type
*die_descriptive_type (struct die_info
*,
1007 struct dwarf2_cu
*);
1009 static void set_descriptive_type (struct type
*, struct die_info
*,
1010 struct dwarf2_cu
*);
1012 static struct type
*die_containing_type (struct die_info
*,
1013 struct dwarf2_cu
*);
1015 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1016 struct dwarf2_cu
*);
1018 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1020 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1022 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1024 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1025 const char *suffix
, int physname
,
1026 struct dwarf2_cu
*cu
);
1028 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1030 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1032 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1034 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1036 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1038 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1039 struct dwarf2_cu
*, struct partial_symtab
*);
1041 static int dwarf2_get_pc_bounds (struct die_info
*,
1042 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1043 struct partial_symtab
*);
1045 static void get_scope_pc_bounds (struct die_info
*,
1046 CORE_ADDR
*, CORE_ADDR
*,
1047 struct dwarf2_cu
*);
1049 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1050 CORE_ADDR
, struct dwarf2_cu
*);
1052 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1053 struct dwarf2_cu
*);
1055 static void dwarf2_attach_fields_to_type (struct field_info
*,
1056 struct type
*, struct dwarf2_cu
*);
1058 static void dwarf2_add_member_fn (struct field_info
*,
1059 struct die_info
*, struct type
*,
1060 struct dwarf2_cu
*);
1062 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1064 struct dwarf2_cu
*);
1066 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1068 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1070 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1072 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1074 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1076 static struct type
*read_module_type (struct die_info
*die
,
1077 struct dwarf2_cu
*cu
);
1079 static const char *namespace_name (struct die_info
*die
,
1080 int *is_anonymous
, struct dwarf2_cu
*);
1082 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1084 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1086 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1087 struct dwarf2_cu
*);
1089 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1091 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1093 gdb_byte
**new_info_ptr
,
1094 struct die_info
*parent
);
1096 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1098 gdb_byte
**new_info_ptr
,
1099 struct die_info
*parent
);
1101 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1103 gdb_byte
**new_info_ptr
,
1104 struct die_info
*parent
);
1106 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1107 struct die_info
**, gdb_byte
*,
1110 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1112 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1115 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1117 static const char *dwarf2_full_name (char *name
,
1118 struct die_info
*die
,
1119 struct dwarf2_cu
*cu
);
1121 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1122 struct dwarf2_cu
**);
1124 static char *dwarf_tag_name (unsigned int);
1126 static char *dwarf_attr_name (unsigned int);
1128 static char *dwarf_form_name (unsigned int);
1130 static char *dwarf_bool_name (unsigned int);
1132 static char *dwarf_type_encoding_name (unsigned int);
1135 static char *dwarf_cfi_name (unsigned int);
1138 static struct die_info
*sibling_die (struct die_info
*);
1140 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1142 static void dump_die_for_error (struct die_info
*);
1144 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1147 /*static*/ void dump_die (struct die_info
*, int max_level
);
1149 static void store_in_ref_table (struct die_info
*,
1150 struct dwarf2_cu
*);
1152 static int is_ref_attr (struct attribute
*);
1154 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1156 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1158 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1160 struct dwarf2_cu
**);
1162 static struct die_info
*follow_die_ref (struct die_info
*,
1164 struct dwarf2_cu
**);
1166 static struct die_info
*follow_die_sig (struct die_info
*,
1168 struct dwarf2_cu
**);
1170 static struct signatured_type
*lookup_signatured_type_at_offset
1171 (struct objfile
*objfile
,
1172 struct dwarf2_section_info
*section
,
1173 unsigned int offset
);
1175 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1177 static void read_signatured_type (struct signatured_type
*type_sig
);
1179 /* memory allocation interface */
1181 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1183 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1185 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1187 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1188 char *, bfd
*, struct dwarf2_cu
*,
1189 struct dwarf2_section_info
*,
1192 static int attr_form_is_block (struct attribute
*);
1194 static int attr_form_is_section_offset (struct attribute
*);
1196 static int attr_form_is_constant (struct attribute
*);
1198 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1199 struct dwarf2_loclist_baton
*baton
,
1200 struct attribute
*attr
);
1202 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1204 struct dwarf2_cu
*cu
);
1206 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1207 struct abbrev_info
*abbrev
,
1208 struct dwarf2_cu
*cu
);
1210 static void free_stack_comp_unit (void *);
1212 static hashval_t
partial_die_hash (const void *item
);
1214 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1216 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1217 (unsigned int offset
, struct objfile
*objfile
);
1219 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1220 struct dwarf2_per_cu_data
*per_cu
);
1222 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1223 struct die_info
*comp_unit_die
);
1225 static void free_heap_comp_unit (void *);
1227 static void free_cached_comp_units (void *);
1229 static void age_cached_comp_units (void);
1231 static void free_one_cached_comp_unit (void *);
1233 static struct type
*set_die_type (struct die_info
*, struct type
*,
1234 struct dwarf2_cu
*);
1236 static void create_all_comp_units (struct objfile
*);
1238 static int create_debug_types_hash_table (struct objfile
*objfile
);
1240 static void load_full_comp_unit (struct dwarf2_per_cu_data
*);
1242 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1244 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1245 struct dwarf2_per_cu_data
*);
1247 static void dwarf2_mark (struct dwarf2_cu
*);
1249 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1251 static struct type
*get_die_type_at_offset (unsigned int,
1252 struct dwarf2_per_cu_data
*per_cu
);
1254 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1256 static void dwarf2_release_queue (void *dummy
);
1258 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
);
1260 static void process_queue (void);
1262 static void find_file_and_directory (struct die_info
*die
,
1263 struct dwarf2_cu
*cu
,
1264 char **name
, char **comp_dir
);
1266 static char *file_full_name (int file
, struct line_header
*lh
,
1267 const char *comp_dir
);
1269 static gdb_byte
*read_and_check_comp_unit_head
1270 (struct comp_unit_head
*header
,
1271 struct dwarf2_section_info
*section
, gdb_byte
*info_ptr
,
1272 int is_debug_types_section
);
1274 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1275 struct dwarf2_cu
*cu
);
1277 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1281 /* Convert VALUE between big- and little-endian. */
1283 byte_swap (offset_type value
)
1287 result
= (value
& 0xff) << 24;
1288 result
|= (value
& 0xff00) << 8;
1289 result
|= (value
& 0xff0000) >> 8;
1290 result
|= (value
& 0xff000000) >> 24;
1294 #define MAYBE_SWAP(V) byte_swap (V)
1297 #define MAYBE_SWAP(V) (V)
1298 #endif /* WORDS_BIGENDIAN */
1300 /* The suffix for an index file. */
1301 #define INDEX_SUFFIX ".gdb-index"
1303 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1304 struct dwarf2_cu
*cu
);
1306 /* Try to locate the sections we need for DWARF 2 debugging
1307 information and return true if we have enough to do something.
1308 NAMES points to the dwarf2 section names, or is NULL if the standard
1309 ELF names are used. */
1312 dwarf2_has_info (struct objfile
*objfile
,
1313 const struct dwarf2_debug_sections
*names
)
1315 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1316 if (!dwarf2_per_objfile
)
1318 /* Initialize per-objfile state. */
1319 struct dwarf2_per_objfile
*data
1320 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1322 memset (data
, 0, sizeof (*data
));
1323 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1324 dwarf2_per_objfile
= data
;
1326 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1328 dwarf2_per_objfile
->objfile
= objfile
;
1330 return (dwarf2_per_objfile
->info
.asection
!= NULL
1331 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1334 /* When loading sections, we look either for uncompressed section or for
1335 compressed section names. */
1338 section_is_p (const char *section_name
,
1339 const struct dwarf2_section_names
*names
)
1341 if (names
->normal
!= NULL
1342 && strcmp (section_name
, names
->normal
) == 0)
1344 if (names
->compressed
!= NULL
1345 && strcmp (section_name
, names
->compressed
) == 0)
1350 /* This function is mapped across the sections and remembers the
1351 offset and size of each of the debugging sections we are interested
1355 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1357 const struct dwarf2_debug_sections
*names
;
1360 names
= &dwarf2_elf_names
;
1362 names
= (const struct dwarf2_debug_sections
*) vnames
;
1364 if (section_is_p (sectp
->name
, &names
->info
))
1366 dwarf2_per_objfile
->info
.asection
= sectp
;
1367 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1369 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1371 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1372 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1374 else if (section_is_p (sectp
->name
, &names
->line
))
1376 dwarf2_per_objfile
->line
.asection
= sectp
;
1377 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1379 else if (section_is_p (sectp
->name
, &names
->loc
))
1381 dwarf2_per_objfile
->loc
.asection
= sectp
;
1382 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1384 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1386 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1387 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1389 else if (section_is_p (sectp
->name
, &names
->macro
))
1391 dwarf2_per_objfile
->macro
.asection
= sectp
;
1392 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1394 else if (section_is_p (sectp
->name
, &names
->str
))
1396 dwarf2_per_objfile
->str
.asection
= sectp
;
1397 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1399 else if (section_is_p (sectp
->name
, &names
->frame
))
1401 dwarf2_per_objfile
->frame
.asection
= sectp
;
1402 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1404 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1406 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1408 if (aflag
& SEC_HAS_CONTENTS
)
1410 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1411 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1414 else if (section_is_p (sectp
->name
, &names
->ranges
))
1416 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1417 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1419 else if (section_is_p (sectp
->name
, &names
->types
))
1421 struct dwarf2_section_info type_section
;
1423 memset (&type_section
, 0, sizeof (type_section
));
1424 type_section
.asection
= sectp
;
1425 type_section
.size
= bfd_get_section_size (sectp
);
1427 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1430 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1432 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1433 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1436 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1437 && bfd_section_vma (abfd
, sectp
) == 0)
1438 dwarf2_per_objfile
->has_section_at_zero
= 1;
1441 /* Decompress a section that was compressed using zlib. Store the
1442 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1445 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1446 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1448 bfd
*abfd
= objfile
->obfd
;
1450 error (_("Support for zlib-compressed DWARF data (from '%s') "
1451 "is disabled in this copy of GDB"),
1452 bfd_get_filename (abfd
));
1454 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1455 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1456 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1457 bfd_size_type uncompressed_size
;
1458 gdb_byte
*uncompressed_buffer
;
1461 int header_size
= 12;
1463 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1464 || bfd_bread (compressed_buffer
,
1465 compressed_size
, abfd
) != compressed_size
)
1466 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1467 bfd_get_filename (abfd
));
1469 /* Read the zlib header. In this case, it should be "ZLIB" followed
1470 by the uncompressed section size, 8 bytes in big-endian order. */
1471 if (compressed_size
< header_size
1472 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1473 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1474 bfd_get_filename (abfd
));
1475 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1476 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1477 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1478 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1479 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1480 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1481 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1482 uncompressed_size
+= compressed_buffer
[11];
1484 /* It is possible the section consists of several compressed
1485 buffers concatenated together, so we uncompress in a loop. */
1489 strm
.avail_in
= compressed_size
- header_size
;
1490 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1491 strm
.avail_out
= uncompressed_size
;
1492 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1494 rc
= inflateInit (&strm
);
1495 while (strm
.avail_in
> 0)
1498 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1499 bfd_get_filename (abfd
), rc
);
1500 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1501 + (uncompressed_size
- strm
.avail_out
));
1502 rc
= inflate (&strm
, Z_FINISH
);
1503 if (rc
!= Z_STREAM_END
)
1504 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1505 bfd_get_filename (abfd
), rc
);
1506 rc
= inflateReset (&strm
);
1508 rc
= inflateEnd (&strm
);
1510 || strm
.avail_out
!= 0)
1511 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1512 bfd_get_filename (abfd
), rc
);
1514 do_cleanups (cleanup
);
1515 *outbuf
= uncompressed_buffer
;
1516 *outsize
= uncompressed_size
;
1520 /* A helper function that decides whether a section is empty. */
1523 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1525 return info
->asection
== NULL
|| info
->size
== 0;
1528 /* Read the contents of the section INFO from object file specified by
1529 OBJFILE, store info about the section into INFO.
1530 If the section is compressed, uncompress it before returning. */
1533 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1535 bfd
*abfd
= objfile
->obfd
;
1536 asection
*sectp
= info
->asection
;
1537 gdb_byte
*buf
, *retbuf
;
1538 unsigned char header
[4];
1542 info
->buffer
= NULL
;
1543 info
->map_addr
= NULL
;
1546 if (dwarf2_section_empty_p (info
))
1549 /* Check if the file has a 4-byte header indicating compression. */
1550 if (info
->size
> sizeof (header
)
1551 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1552 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1554 /* Upon decompression, update the buffer and its size. */
1555 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1557 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1565 pagesize
= getpagesize ();
1567 /* Only try to mmap sections which are large enough: we don't want to
1568 waste space due to fragmentation. Also, only try mmap for sections
1569 without relocations. */
1571 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1573 info
->buffer
= bfd_mmap (abfd
, 0, info
->size
, PROT_READ
,
1574 MAP_PRIVATE
, sectp
->filepos
,
1575 &info
->map_addr
, &info
->map_len
);
1577 if ((caddr_t
)info
->buffer
!= MAP_FAILED
)
1579 #if HAVE_POSIX_MADVISE
1580 posix_madvise (info
->map_addr
, info
->map_len
, POSIX_MADV_WILLNEED
);
1587 /* If we get here, we are a normal, not-compressed section. */
1589 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1591 /* When debugging .o files, we may need to apply relocations; see
1592 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1593 We never compress sections in .o files, so we only need to
1594 try this when the section is not compressed. */
1595 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1598 info
->buffer
= retbuf
;
1602 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1603 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1604 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1605 bfd_get_filename (abfd
));
1608 /* A helper function that returns the size of a section in a safe way.
1609 If you are positive that the section has been read before using the
1610 size, then it is safe to refer to the dwarf2_section_info object's
1611 "size" field directly. In other cases, you must call this
1612 function, because for compressed sections the size field is not set
1613 correctly until the section has been read. */
1615 static bfd_size_type
1616 dwarf2_section_size (struct objfile
*objfile
,
1617 struct dwarf2_section_info
*info
)
1620 dwarf2_read_section (objfile
, info
);
1624 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1628 dwarf2_get_section_info (struct objfile
*objfile
,
1629 enum dwarf2_section_enum sect
,
1630 asection
**sectp
, gdb_byte
**bufp
,
1631 bfd_size_type
*sizep
)
1633 struct dwarf2_per_objfile
*data
1634 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1635 struct dwarf2_section_info
*info
;
1637 /* We may see an objfile without any DWARF, in which case we just
1648 case DWARF2_DEBUG_FRAME
:
1649 info
= &data
->frame
;
1651 case DWARF2_EH_FRAME
:
1652 info
= &data
->eh_frame
;
1655 gdb_assert_not_reached ("unexpected section");
1658 dwarf2_read_section (objfile
, info
);
1660 *sectp
= info
->asection
;
1661 *bufp
= info
->buffer
;
1662 *sizep
= info
->size
;
1666 /* DWARF quick_symbols_functions support. */
1668 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1669 unique line tables, so we maintain a separate table of all .debug_line
1670 derived entries to support the sharing.
1671 All the quick functions need is the list of file names. We discard the
1672 line_header when we're done and don't need to record it here. */
1673 struct quick_file_names
1675 /* The offset in .debug_line of the line table. We hash on this. */
1676 unsigned int offset
;
1678 /* The number of entries in file_names, real_names. */
1679 unsigned int num_file_names
;
1681 /* The file names from the line table, after being run through
1683 const char **file_names
;
1685 /* The file names from the line table after being run through
1686 gdb_realpath. These are computed lazily. */
1687 const char **real_names
;
1690 /* When using the index (and thus not using psymtabs), each CU has an
1691 object of this type. This is used to hold information needed by
1692 the various "quick" methods. */
1693 struct dwarf2_per_cu_quick_data
1695 /* The file table. This can be NULL if there was no file table
1696 or it's currently not read in.
1697 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1698 struct quick_file_names
*file_names
;
1700 /* The corresponding symbol table. This is NULL if symbols for this
1701 CU have not yet been read. */
1702 struct symtab
*symtab
;
1704 /* A temporary mark bit used when iterating over all CUs in
1705 expand_symtabs_matching. */
1706 unsigned int mark
: 1;
1708 /* True if we've tried to read the file table and found there isn't one.
1709 There will be no point in trying to read it again next time. */
1710 unsigned int no_file_data
: 1;
1713 /* Hash function for a quick_file_names. */
1716 hash_file_name_entry (const void *e
)
1718 const struct quick_file_names
*file_data
= e
;
1720 return file_data
->offset
;
1723 /* Equality function for a quick_file_names. */
1726 eq_file_name_entry (const void *a
, const void *b
)
1728 const struct quick_file_names
*ea
= a
;
1729 const struct quick_file_names
*eb
= b
;
1731 return ea
->offset
== eb
->offset
;
1734 /* Delete function for a quick_file_names. */
1737 delete_file_name_entry (void *e
)
1739 struct quick_file_names
*file_data
= e
;
1742 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1744 xfree ((void*) file_data
->file_names
[i
]);
1745 if (file_data
->real_names
)
1746 xfree ((void*) file_data
->real_names
[i
]);
1749 /* The space for the struct itself lives on objfile_obstack,
1750 so we don't free it here. */
1753 /* Create a quick_file_names hash table. */
1756 create_quick_file_names_table (unsigned int nr_initial_entries
)
1758 return htab_create_alloc (nr_initial_entries
,
1759 hash_file_name_entry
, eq_file_name_entry
,
1760 delete_file_name_entry
, xcalloc
, xfree
);
1763 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
1764 have to be created afterwards. You should call age_cached_comp_units after
1765 processing PER_CU->CU. dw2_setup must have been already called. */
1768 load_cu (struct dwarf2_per_cu_data
*per_cu
)
1770 if (per_cu
->debug_types_section
)
1771 load_full_type_unit (per_cu
);
1773 load_full_comp_unit (per_cu
);
1775 gdb_assert (per_cu
->cu
!= NULL
);
1777 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
1780 /* Read in the symbols for PER_CU. */
1783 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1785 struct cleanup
*back_to
;
1787 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1789 queue_comp_unit (per_cu
);
1795 /* Age the cache, releasing compilation units that have not
1796 been used recently. */
1797 age_cached_comp_units ();
1799 do_cleanups (back_to
);
1802 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1803 the objfile from which this CU came. Returns the resulting symbol
1806 static struct symtab
*
1807 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1809 if (!per_cu
->v
.quick
->symtab
)
1811 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1812 increment_reading_symtab ();
1813 dw2_do_instantiate_symtab (per_cu
);
1814 do_cleanups (back_to
);
1816 return per_cu
->v
.quick
->symtab
;
1819 /* Return the CU given its index. */
1821 static struct dwarf2_per_cu_data
*
1822 dw2_get_cu (int index
)
1824 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1826 index
-= dwarf2_per_objfile
->n_comp_units
;
1827 return dwarf2_per_objfile
->all_type_units
[index
];
1829 return dwarf2_per_objfile
->all_comp_units
[index
];
1832 /* A helper function that knows how to read a 64-bit value in a way
1833 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1837 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1839 if (sizeof (ULONGEST
) < 8)
1843 /* Ignore the upper 4 bytes if they are all zero. */
1844 for (i
= 0; i
< 4; ++i
)
1845 if (bytes
[i
+ 4] != 0)
1848 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1851 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1855 /* Read the CU list from the mapped index, and use it to create all
1856 the CU objects for this objfile. Return 0 if something went wrong,
1857 1 if everything went ok. */
1860 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1861 offset_type cu_list_elements
)
1865 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1866 dwarf2_per_objfile
->all_comp_units
1867 = obstack_alloc (&objfile
->objfile_obstack
,
1868 dwarf2_per_objfile
->n_comp_units
1869 * sizeof (struct dwarf2_per_cu_data
*));
1871 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1873 struct dwarf2_per_cu_data
*the_cu
;
1874 ULONGEST offset
, length
;
1876 if (!extract_cu_value (cu_list
, &offset
)
1877 || !extract_cu_value (cu_list
+ 8, &length
))
1881 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1882 struct dwarf2_per_cu_data
);
1883 the_cu
->offset
= offset
;
1884 the_cu
->length
= length
;
1885 the_cu
->objfile
= objfile
;
1886 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1887 struct dwarf2_per_cu_quick_data
);
1888 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1894 /* Create the signatured type hash table from the index. */
1897 create_signatured_type_table_from_index (struct objfile
*objfile
,
1898 struct dwarf2_section_info
*section
,
1899 const gdb_byte
*bytes
,
1900 offset_type elements
)
1903 htab_t sig_types_hash
;
1905 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
1906 dwarf2_per_objfile
->all_type_units
1907 = obstack_alloc (&objfile
->objfile_obstack
,
1908 dwarf2_per_objfile
->n_type_units
1909 * sizeof (struct dwarf2_per_cu_data
*));
1911 sig_types_hash
= allocate_signatured_type_table (objfile
);
1913 for (i
= 0; i
< elements
; i
+= 3)
1915 struct signatured_type
*type_sig
;
1916 ULONGEST offset
, type_offset
, signature
;
1919 if (!extract_cu_value (bytes
, &offset
)
1920 || !extract_cu_value (bytes
+ 8, &type_offset
))
1922 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1925 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1926 struct signatured_type
);
1927 type_sig
->signature
= signature
;
1928 type_sig
->type_offset
= type_offset
;
1929 type_sig
->per_cu
.debug_types_section
= section
;
1930 type_sig
->per_cu
.offset
= offset
;
1931 type_sig
->per_cu
.objfile
= objfile
;
1932 type_sig
->per_cu
.v
.quick
1933 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1934 struct dwarf2_per_cu_quick_data
);
1936 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1939 dwarf2_per_objfile
->all_type_units
[i
/ 3] = &type_sig
->per_cu
;
1942 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1947 /* Read the address map data from the mapped index, and use it to
1948 populate the objfile's psymtabs_addrmap. */
1951 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1953 const gdb_byte
*iter
, *end
;
1954 struct obstack temp_obstack
;
1955 struct addrmap
*mutable_map
;
1956 struct cleanup
*cleanup
;
1959 obstack_init (&temp_obstack
);
1960 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1961 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1963 iter
= index
->address_table
;
1964 end
= iter
+ index
->address_table_size
;
1966 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1970 ULONGEST hi
, lo
, cu_index
;
1971 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1973 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1975 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1978 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1979 dw2_get_cu (cu_index
));
1982 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1983 &objfile
->objfile_obstack
);
1984 do_cleanups (cleanup
);
1987 /* The hash function for strings in the mapped index. This is the same as
1988 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
1989 implementation. This is necessary because the hash function is tied to the
1990 format of the mapped index file. The hash values do not have to match with
1993 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
1996 mapped_index_string_hash (int index_version
, const void *p
)
1998 const unsigned char *str
= (const unsigned char *) p
;
2002 while ((c
= *str
++) != 0)
2004 if (index_version
>= 5)
2006 r
= r
* 67 + c
- 113;
2012 /* Find a slot in the mapped index INDEX for the object named NAME.
2013 If NAME is found, set *VEC_OUT to point to the CU vector in the
2014 constant pool and return 1. If NAME cannot be found, return 0. */
2017 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2018 offset_type
**vec_out
)
2020 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2022 offset_type slot
, step
;
2023 int (*cmp
) (const char *, const char *);
2025 if (current_language
->la_language
== language_cplus
2026 || current_language
->la_language
== language_java
2027 || current_language
->la_language
== language_fortran
)
2029 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2031 const char *paren
= strchr (name
, '(');
2037 dup
= xmalloc (paren
- name
+ 1);
2038 memcpy (dup
, name
, paren
- name
);
2039 dup
[paren
- name
] = 0;
2041 make_cleanup (xfree
, dup
);
2046 /* Index version 4 did not support case insensitive searches. But the
2047 indices for case insensitive languages are built in lowercase, therefore
2048 simulate our NAME being searched is also lowercased. */
2049 hash
= mapped_index_string_hash ((index
->version
== 4
2050 && case_sensitivity
== case_sensitive_off
2051 ? 5 : index
->version
),
2054 slot
= hash
& (index
->symbol_table_slots
- 1);
2055 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2056 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2060 /* Convert a slot number to an offset into the table. */
2061 offset_type i
= 2 * slot
;
2063 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2065 do_cleanups (back_to
);
2069 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2070 if (!cmp (name
, str
))
2072 *vec_out
= (offset_type
*) (index
->constant_pool
2073 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2074 do_cleanups (back_to
);
2078 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2082 /* Read the index file. If everything went ok, initialize the "quick"
2083 elements of all the CUs and return 1. Otherwise, return 0. */
2086 dwarf2_read_index (struct objfile
*objfile
)
2089 struct mapped_index
*map
;
2090 offset_type
*metadata
;
2091 const gdb_byte
*cu_list
;
2092 const gdb_byte
*types_list
= NULL
;
2093 offset_type version
, cu_list_elements
;
2094 offset_type types_list_elements
= 0;
2097 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2100 /* Older elfutils strip versions could keep the section in the main
2101 executable while splitting it for the separate debug info file. */
2102 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2103 & SEC_HAS_CONTENTS
) == 0)
2106 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2108 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2109 /* Version check. */
2110 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2111 /* Versions earlier than 3 emitted every copy of a psymbol. This
2112 causes the index to behave very poorly for certain requests. Version 3
2113 contained incomplete addrmap. So, it seems better to just ignore such
2114 indices. Index version 4 uses a different hash function than index
2115 version 5 and later. */
2118 /* Indices with higher version than the one supported by GDB may be no
2119 longer backward compatible. */
2123 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2124 map
->version
= version
;
2125 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2127 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2130 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2131 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2135 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2136 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2137 - MAYBE_SWAP (metadata
[i
]))
2141 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2142 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2143 - MAYBE_SWAP (metadata
[i
]));
2146 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2147 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2148 - MAYBE_SWAP (metadata
[i
]))
2149 / (2 * sizeof (offset_type
)));
2152 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2154 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2157 if (types_list_elements
)
2159 struct dwarf2_section_info
*section
;
2161 /* We can only handle a single .debug_types when we have an
2163 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2166 section
= VEC_index (dwarf2_section_info_def
,
2167 dwarf2_per_objfile
->types
, 0);
2169 if (!create_signatured_type_table_from_index (objfile
, section
,
2171 types_list_elements
))
2175 create_addrmap_from_index (objfile
, map
);
2177 dwarf2_per_objfile
->index_table
= map
;
2178 dwarf2_per_objfile
->using_index
= 1;
2179 dwarf2_per_objfile
->quick_file_names_table
=
2180 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2185 /* A helper for the "quick" functions which sets the global
2186 dwarf2_per_objfile according to OBJFILE. */
2189 dw2_setup (struct objfile
*objfile
)
2191 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2192 gdb_assert (dwarf2_per_objfile
);
2195 /* A helper for the "quick" functions which attempts to read the line
2196 table for THIS_CU. */
2198 static struct quick_file_names
*
2199 dw2_get_file_names (struct objfile
*objfile
,
2200 struct dwarf2_per_cu_data
*this_cu
)
2202 bfd
*abfd
= objfile
->obfd
;
2203 struct line_header
*lh
;
2204 struct attribute
*attr
;
2205 struct cleanup
*cleanups
;
2206 struct die_info
*comp_unit_die
;
2207 struct dwarf2_section_info
* sec
;
2209 int has_children
, i
;
2210 struct dwarf2_cu cu
;
2211 unsigned int bytes_read
;
2212 struct die_reader_specs reader_specs
;
2213 char *name
, *comp_dir
;
2215 struct quick_file_names
*qfn
;
2216 unsigned int line_offset
;
2218 if (this_cu
->v
.quick
->file_names
!= NULL
)
2219 return this_cu
->v
.quick
->file_names
;
2220 /* If we know there is no line data, no point in looking again. */
2221 if (this_cu
->v
.quick
->no_file_data
)
2224 init_one_comp_unit (&cu
, this_cu
);
2225 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2227 if (this_cu
->debug_types_section
)
2228 sec
= this_cu
->debug_types_section
;
2230 sec
= &dwarf2_per_objfile
->info
;
2231 dwarf2_read_section (objfile
, sec
);
2232 info_ptr
= sec
->buffer
+ this_cu
->offset
;
2234 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, sec
, info_ptr
,
2235 this_cu
->debug_types_section
!= NULL
);
2237 /* Skip dummy compilation units. */
2238 if (info_ptr
>= (sec
->buffer
+ sec
->size
)
2239 || peek_abbrev_code (abfd
, info_ptr
) == 0)
2241 do_cleanups (cleanups
);
2245 dwarf2_read_abbrevs (&cu
);
2246 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2248 init_cu_die_reader (&reader_specs
, &cu
);
2249 read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2255 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2258 struct quick_file_names find_entry
;
2260 line_offset
= DW_UNSND (attr
);
2262 /* We may have already read in this line header (TU line header sharing).
2263 If we have we're done. */
2264 find_entry
.offset
= line_offset
;
2265 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2266 &find_entry
, INSERT
);
2269 do_cleanups (cleanups
);
2270 this_cu
->v
.quick
->file_names
= *slot
;
2274 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2278 do_cleanups (cleanups
);
2279 this_cu
->v
.quick
->no_file_data
= 1;
2283 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2284 qfn
->offset
= line_offset
;
2285 gdb_assert (slot
!= NULL
);
2288 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2290 qfn
->num_file_names
= lh
->num_file_names
;
2291 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2292 lh
->num_file_names
* sizeof (char *));
2293 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2294 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2295 qfn
->real_names
= NULL
;
2297 free_line_header (lh
);
2298 do_cleanups (cleanups
);
2300 this_cu
->v
.quick
->file_names
= qfn
;
2304 /* A helper for the "quick" functions which computes and caches the
2305 real path for a given file name from the line table. */
2308 dw2_get_real_path (struct objfile
*objfile
,
2309 struct quick_file_names
*qfn
, int index
)
2311 if (qfn
->real_names
== NULL
)
2312 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2313 qfn
->num_file_names
, sizeof (char *));
2315 if (qfn
->real_names
[index
] == NULL
)
2316 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2318 return qfn
->real_names
[index
];
2321 static struct symtab
*
2322 dw2_find_last_source_symtab (struct objfile
*objfile
)
2326 dw2_setup (objfile
);
2327 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2328 return dw2_instantiate_symtab (dw2_get_cu (index
));
2331 /* Traversal function for dw2_forget_cached_source_info. */
2334 dw2_free_cached_file_names (void **slot
, void *info
)
2336 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2338 if (file_data
->real_names
)
2342 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2344 xfree ((void*) file_data
->real_names
[i
]);
2345 file_data
->real_names
[i
] = NULL
;
2353 dw2_forget_cached_source_info (struct objfile
*objfile
)
2355 dw2_setup (objfile
);
2357 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2358 dw2_free_cached_file_names
, NULL
);
2361 /* Helper function for dw2_map_symtabs_matching_filename that expands
2362 the symtabs and calls the iterator. */
2365 dw2_map_expand_apply (struct objfile
*objfile
,
2366 struct dwarf2_per_cu_data
*per_cu
,
2368 const char *full_path
, const char *real_path
,
2369 int (*callback
) (struct symtab
*, void *),
2372 struct symtab
*last_made
= objfile
->symtabs
;
2374 /* Don't visit already-expanded CUs. */
2375 if (per_cu
->v
.quick
->symtab
)
2378 /* This may expand more than one symtab, and we want to iterate over
2380 dw2_instantiate_symtab (per_cu
);
2382 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2383 objfile
->symtabs
, last_made
);
2386 /* Implementation of the map_symtabs_matching_filename method. */
2389 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
2390 const char *full_path
, const char *real_path
,
2391 int (*callback
) (struct symtab
*, void *),
2395 const char *name_basename
= lbasename (name
);
2396 int name_len
= strlen (name
);
2397 int is_abs
= IS_ABSOLUTE_PATH (name
);
2399 dw2_setup (objfile
);
2401 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2402 + dwarf2_per_objfile
->n_type_units
); ++i
)
2405 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2406 struct quick_file_names
*file_data
;
2408 /* We only need to look at symtabs not already expanded. */
2409 if (per_cu
->v
.quick
->symtab
)
2412 file_data
= dw2_get_file_names (objfile
, per_cu
);
2413 if (file_data
== NULL
)
2416 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2418 const char *this_name
= file_data
->file_names
[j
];
2420 if (FILENAME_CMP (name
, this_name
) == 0
2421 || (!is_abs
&& compare_filenames_for_search (this_name
,
2424 if (dw2_map_expand_apply (objfile
, per_cu
,
2425 name
, full_path
, real_path
,
2430 /* Before we invoke realpath, which can get expensive when many
2431 files are involved, do a quick comparison of the basenames. */
2432 if (! basenames_may_differ
2433 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
2436 if (full_path
!= NULL
)
2438 const char *this_real_name
= dw2_get_real_path (objfile
,
2441 if (this_real_name
!= NULL
2442 && (FILENAME_CMP (full_path
, this_real_name
) == 0
2444 && compare_filenames_for_search (this_real_name
,
2447 if (dw2_map_expand_apply (objfile
, per_cu
,
2448 name
, full_path
, real_path
,
2454 if (real_path
!= NULL
)
2456 const char *this_real_name
= dw2_get_real_path (objfile
,
2459 if (this_real_name
!= NULL
2460 && (FILENAME_CMP (real_path
, this_real_name
) == 0
2462 && compare_filenames_for_search (this_real_name
,
2465 if (dw2_map_expand_apply (objfile
, per_cu
,
2466 name
, full_path
, real_path
,
2477 static struct symtab
*
2478 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2479 const char *name
, domain_enum domain
)
2481 /* We do all the work in the pre_expand_symtabs_matching hook
2486 /* A helper function that expands all symtabs that hold an object
2490 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2492 dw2_setup (objfile
);
2494 /* index_table is NULL if OBJF_READNOW. */
2495 if (dwarf2_per_objfile
->index_table
)
2499 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2502 offset_type i
, len
= MAYBE_SWAP (*vec
);
2503 for (i
= 0; i
< len
; ++i
)
2505 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2506 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2508 dw2_instantiate_symtab (per_cu
);
2515 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2516 enum block_enum block_kind
, const char *name
,
2519 dw2_do_expand_symtabs_matching (objfile
, name
);
2523 dw2_print_stats (struct objfile
*objfile
)
2527 dw2_setup (objfile
);
2529 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2530 + dwarf2_per_objfile
->n_type_units
); ++i
)
2532 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2534 if (!per_cu
->v
.quick
->symtab
)
2537 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2541 dw2_dump (struct objfile
*objfile
)
2543 /* Nothing worth printing. */
2547 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2548 struct section_offsets
*delta
)
2550 /* There's nothing to relocate here. */
2554 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2555 const char *func_name
)
2557 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2561 dw2_expand_all_symtabs (struct objfile
*objfile
)
2565 dw2_setup (objfile
);
2567 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2568 + dwarf2_per_objfile
->n_type_units
); ++i
)
2570 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2572 dw2_instantiate_symtab (per_cu
);
2577 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2578 const char *filename
)
2582 dw2_setup (objfile
);
2584 /* We don't need to consider type units here.
2585 This is only called for examining code, e.g. expand_line_sal.
2586 There can be an order of magnitude (or more) more type units
2587 than comp units, and we avoid them if we can. */
2589 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2592 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2593 struct quick_file_names
*file_data
;
2595 /* We only need to look at symtabs not already expanded. */
2596 if (per_cu
->v
.quick
->symtab
)
2599 file_data
= dw2_get_file_names (objfile
, per_cu
);
2600 if (file_data
== NULL
)
2603 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2605 const char *this_name
= file_data
->file_names
[j
];
2606 if (FILENAME_CMP (this_name
, filename
) == 0)
2608 dw2_instantiate_symtab (per_cu
);
2616 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2618 struct dwarf2_per_cu_data
*per_cu
;
2620 struct quick_file_names
*file_data
;
2622 dw2_setup (objfile
);
2624 /* index_table is NULL if OBJF_READNOW. */
2625 if (!dwarf2_per_objfile
->index_table
)
2629 ALL_OBJFILE_SYMTABS (objfile
, s
)
2632 struct blockvector
*bv
= BLOCKVECTOR (s
);
2633 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2634 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
2637 return sym
->symtab
->filename
;
2642 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2646 /* Note that this just looks at the very first one named NAME -- but
2647 actually we are looking for a function. find_main_filename
2648 should be rewritten so that it doesn't require a custom hook. It
2649 could just use the ordinary symbol tables. */
2650 /* vec[0] is the length, which must always be >0. */
2651 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2653 file_data
= dw2_get_file_names (objfile
, per_cu
);
2654 if (file_data
== NULL
)
2657 return file_data
->file_names
[file_data
->num_file_names
- 1];
2661 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2662 struct objfile
*objfile
, int global
,
2663 int (*callback
) (struct block
*,
2664 struct symbol
*, void *),
2665 void *data
, symbol_compare_ftype
*match
,
2666 symbol_compare_ftype
*ordered_compare
)
2668 /* Currently unimplemented; used for Ada. The function can be called if the
2669 current language is Ada for a non-Ada objfile using GNU index. As Ada
2670 does not look for non-Ada symbols this function should just return. */
2674 dw2_expand_symtabs_matching
2675 (struct objfile
*objfile
,
2676 int (*file_matcher
) (const char *, void *),
2677 int (*name_matcher
) (const char *, void *),
2678 enum search_domain kind
,
2683 struct mapped_index
*index
;
2685 dw2_setup (objfile
);
2687 /* index_table is NULL if OBJF_READNOW. */
2688 if (!dwarf2_per_objfile
->index_table
)
2690 index
= dwarf2_per_objfile
->index_table
;
2692 if (file_matcher
!= NULL
)
2694 struct cleanup
*cleanup
;
2695 htab_t visited_found
, visited_not_found
;
2697 visited_found
= htab_create_alloc (10,
2698 htab_hash_pointer
, htab_eq_pointer
,
2699 NULL
, xcalloc
, xfree
);
2700 cleanup
= make_cleanup_htab_delete (visited_found
);
2701 visited_not_found
= htab_create_alloc (10,
2702 htab_hash_pointer
, htab_eq_pointer
,
2703 NULL
, xcalloc
, xfree
);
2704 make_cleanup_htab_delete (visited_not_found
);
2706 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2707 + dwarf2_per_objfile
->n_type_units
); ++i
)
2710 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2711 struct quick_file_names
*file_data
;
2714 per_cu
->v
.quick
->mark
= 0;
2716 /* We only need to look at symtabs not already expanded. */
2717 if (per_cu
->v
.quick
->symtab
)
2720 file_data
= dw2_get_file_names (objfile
, per_cu
);
2721 if (file_data
== NULL
)
2724 if (htab_find (visited_not_found
, file_data
) != NULL
)
2726 else if (htab_find (visited_found
, file_data
) != NULL
)
2728 per_cu
->v
.quick
->mark
= 1;
2732 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2734 if (file_matcher (file_data
->file_names
[j
], data
))
2736 per_cu
->v
.quick
->mark
= 1;
2741 slot
= htab_find_slot (per_cu
->v
.quick
->mark
2743 : visited_not_found
,
2748 do_cleanups (cleanup
);
2751 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2753 offset_type idx
= 2 * iter
;
2755 offset_type
*vec
, vec_len
, vec_idx
;
2757 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2760 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
2762 if (! (*name_matcher
) (name
, data
))
2765 /* The name was matched, now expand corresponding CUs that were
2767 vec
= (offset_type
*) (index
->constant_pool
2768 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
2769 vec_len
= MAYBE_SWAP (vec
[0]);
2770 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2772 struct dwarf2_per_cu_data
*per_cu
;
2774 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2775 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
2776 dw2_instantiate_symtab (per_cu
);
2781 static struct symtab
*
2782 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2783 struct minimal_symbol
*msymbol
,
2785 struct obj_section
*section
,
2788 struct dwarf2_per_cu_data
*data
;
2790 dw2_setup (objfile
);
2792 if (!objfile
->psymtabs_addrmap
)
2795 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2799 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2800 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2801 paddress (get_objfile_arch (objfile
), pc
));
2803 return dw2_instantiate_symtab (data
);
2807 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
2808 void *data
, int need_fullname
)
2811 struct cleanup
*cleanup
;
2812 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
2813 NULL
, xcalloc
, xfree
);
2815 cleanup
= make_cleanup_htab_delete (visited
);
2816 dw2_setup (objfile
);
2818 /* We can ignore file names coming from already-expanded CUs. */
2819 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2820 + dwarf2_per_objfile
->n_type_units
); ++i
)
2822 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2824 if (per_cu
->v
.quick
->symtab
)
2826 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
2829 *slot
= per_cu
->v
.quick
->file_names
;
2833 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2834 + dwarf2_per_objfile
->n_type_units
); ++i
)
2837 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2838 struct quick_file_names
*file_data
;
2841 /* We only need to look at symtabs not already expanded. */
2842 if (per_cu
->v
.quick
->symtab
)
2845 file_data
= dw2_get_file_names (objfile
, per_cu
);
2846 if (file_data
== NULL
)
2849 slot
= htab_find_slot (visited
, file_data
, INSERT
);
2852 /* Already visited. */
2857 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2859 const char *this_real_name
;
2862 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
2864 this_real_name
= NULL
;
2865 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
2869 do_cleanups (cleanup
);
2873 dw2_has_symbols (struct objfile
*objfile
)
2878 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2881 dw2_find_last_source_symtab
,
2882 dw2_forget_cached_source_info
,
2883 dw2_map_symtabs_matching_filename
,
2885 dw2_pre_expand_symtabs_matching
,
2889 dw2_expand_symtabs_for_function
,
2890 dw2_expand_all_symtabs
,
2891 dw2_expand_symtabs_with_filename
,
2892 dw2_find_symbol_file
,
2893 dw2_map_matching_symbols
,
2894 dw2_expand_symtabs_matching
,
2895 dw2_find_pc_sect_symtab
,
2896 dw2_map_symbol_filenames
2899 /* Initialize for reading DWARF for this objfile. Return 0 if this
2900 file will use psymtabs, or 1 if using the GNU index. */
2903 dwarf2_initialize_objfile (struct objfile
*objfile
)
2905 /* If we're about to read full symbols, don't bother with the
2906 indices. In this case we also don't care if some other debug
2907 format is making psymtabs, because they are all about to be
2909 if ((objfile
->flags
& OBJF_READNOW
))
2913 dwarf2_per_objfile
->using_index
= 1;
2914 create_all_comp_units (objfile
);
2915 create_debug_types_hash_table (objfile
);
2916 dwarf2_per_objfile
->quick_file_names_table
=
2917 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2919 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2920 + dwarf2_per_objfile
->n_type_units
); ++i
)
2922 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2924 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2925 struct dwarf2_per_cu_quick_data
);
2928 /* Return 1 so that gdb sees the "quick" functions. However,
2929 these functions will be no-ops because we will have expanded
2934 if (dwarf2_read_index (objfile
))
2942 /* Build a partial symbol table. */
2945 dwarf2_build_psymtabs (struct objfile
*objfile
)
2947 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2949 init_psymbol_list (objfile
, 1024);
2952 dwarf2_build_psymtabs_hard (objfile
);
2955 /* Return TRUE if OFFSET is within CU_HEADER. */
2958 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2960 unsigned int bottom
= cu_header
->offset
;
2961 unsigned int top
= (cu_header
->offset
2963 + cu_header
->initial_length_size
);
2965 return (offset
>= bottom
&& offset
< top
);
2968 /* Read in the comp unit header information from the debug_info at info_ptr.
2969 NOTE: This leaves members offset, first_die_offset to be filled in
2973 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2974 gdb_byte
*info_ptr
, bfd
*abfd
)
2977 unsigned int bytes_read
;
2979 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2980 cu_header
->initial_length_size
= bytes_read
;
2981 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2982 info_ptr
+= bytes_read
;
2983 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2985 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2987 info_ptr
+= bytes_read
;
2988 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2990 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2991 if (signed_addr
< 0)
2992 internal_error (__FILE__
, __LINE__
,
2993 _("read_comp_unit_head: dwarf from non elf file"));
2994 cu_header
->signed_addr_p
= signed_addr
;
2999 /* Subroutine of read_and_check_comp_unit_head and
3000 read_and_check_type_unit_head to simplify them.
3001 Perform various error checking on the header. */
3004 error_check_comp_unit_head (struct comp_unit_head
*header
,
3005 struct dwarf2_section_info
*section
)
3007 bfd
*abfd
= section
->asection
->owner
;
3008 const char *filename
= bfd_get_filename (abfd
);
3010 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3011 error (_("Dwarf Error: wrong version in compilation unit header "
3012 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3015 if (header
->abbrev_offset
3016 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
3017 &dwarf2_per_objfile
->abbrev
))
3018 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3019 "(offset 0x%lx + 6) [in module %s]"),
3020 (long) header
->abbrev_offset
, (long) header
->offset
,
3023 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3024 avoid potential 32-bit overflow. */
3025 if (((unsigned long) header
->offset
3026 + header
->length
+ header
->initial_length_size
)
3028 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3029 "(offset 0x%lx + 0) [in module %s]"),
3030 (long) header
->length
, (long) header
->offset
,
3034 /* Read in a CU/TU header and perform some basic error checking.
3035 The contents of the header are stored in HEADER.
3036 The result is a pointer to the start of the first DIE. */
3039 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3040 struct dwarf2_section_info
*section
,
3042 int is_debug_types_section
)
3044 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3045 bfd
*abfd
= section
->asection
->owner
;
3047 header
->offset
= beg_of_comp_unit
- section
->buffer
;
3049 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3051 /* If we're reading a type unit, skip over the signature and
3052 type_offset fields. */
3053 if (is_debug_types_section
)
3054 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3056 header
->first_die_offset
= info_ptr
- beg_of_comp_unit
;
3058 error_check_comp_unit_head (header
, section
);
3063 /* Read in the types comp unit header information from .debug_types entry at
3064 types_ptr. The result is a pointer to one past the end of the header. */
3067 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3068 struct dwarf2_section_info
*section
,
3070 ULONGEST
*signature
, unsigned int *type_offset
)
3072 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3073 bfd
*abfd
= section
->asection
->owner
;
3075 header
->offset
= beg_of_comp_unit
- section
->buffer
;
3077 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3079 /* If we're reading a type unit, skip over the signature and
3080 type_offset fields. */
3081 if (signature
!= NULL
)
3082 *signature
= read_8_bytes (abfd
, info_ptr
);
3084 if (type_offset
!= NULL
)
3085 *type_offset
= read_offset_1 (abfd
, info_ptr
, header
->offset_size
);
3086 info_ptr
+= header
->offset_size
;
3088 header
->first_die_offset
= info_ptr
- beg_of_comp_unit
;
3090 error_check_comp_unit_head (header
, section
);
3095 /* Allocate a new partial symtab for file named NAME and mark this new
3096 partial symtab as being an include of PST. */
3099 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3100 struct objfile
*objfile
)
3102 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3104 subpst
->section_offsets
= pst
->section_offsets
;
3105 subpst
->textlow
= 0;
3106 subpst
->texthigh
= 0;
3108 subpst
->dependencies
= (struct partial_symtab
**)
3109 obstack_alloc (&objfile
->objfile_obstack
,
3110 sizeof (struct partial_symtab
*));
3111 subpst
->dependencies
[0] = pst
;
3112 subpst
->number_of_dependencies
= 1;
3114 subpst
->globals_offset
= 0;
3115 subpst
->n_global_syms
= 0;
3116 subpst
->statics_offset
= 0;
3117 subpst
->n_static_syms
= 0;
3118 subpst
->symtab
= NULL
;
3119 subpst
->read_symtab
= pst
->read_symtab
;
3122 /* No private part is necessary for include psymtabs. This property
3123 can be used to differentiate between such include psymtabs and
3124 the regular ones. */
3125 subpst
->read_symtab_private
= NULL
;
3128 /* Read the Line Number Program data and extract the list of files
3129 included by the source file represented by PST. Build an include
3130 partial symtab for each of these included files. */
3133 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3134 struct die_info
*die
,
3135 struct partial_symtab
*pst
)
3137 struct objfile
*objfile
= cu
->objfile
;
3138 bfd
*abfd
= objfile
->obfd
;
3139 struct line_header
*lh
= NULL
;
3140 struct attribute
*attr
;
3142 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3145 unsigned int line_offset
= DW_UNSND (attr
);
3147 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3150 return; /* No linetable, so no includes. */
3152 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3153 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3155 free_line_header (lh
);
3159 hash_type_signature (const void *item
)
3161 const struct signatured_type
*type_sig
= item
;
3163 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3164 return type_sig
->signature
;
3168 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
3170 const struct signatured_type
*lhs
= item_lhs
;
3171 const struct signatured_type
*rhs
= item_rhs
;
3173 return lhs
->signature
== rhs
->signature
;
3176 /* Allocate a hash table for signatured types. */
3179 allocate_signatured_type_table (struct objfile
*objfile
)
3181 return htab_create_alloc_ex (41,
3182 hash_type_signature
,
3185 &objfile
->objfile_obstack
,
3186 hashtab_obstack_allocate
,
3187 dummy_obstack_deallocate
);
3190 /* A helper function to add a signatured type CU to a table. */
3193 add_signatured_type_cu_to_table (void **slot
, void *datum
)
3195 struct signatured_type
*sigt
= *slot
;
3196 struct dwarf2_per_cu_data
***datap
= datum
;
3198 **datap
= &sigt
->per_cu
;
3204 /* Create the hash table of all entries in the .debug_types section(s).
3205 The result is zero if there is an error (e.g. missing .debug_types section),
3206 otherwise non-zero. */
3209 create_debug_types_hash_table (struct objfile
*objfile
)
3211 htab_t types_htab
= NULL
;
3212 struct dwarf2_per_cu_data
**iter
;
3214 struct dwarf2_section_info
*section
;
3216 if (VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
))
3218 dwarf2_per_objfile
->signatured_types
= NULL
;
3223 VEC_iterate (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
3227 gdb_byte
*info_ptr
, *end_ptr
;
3229 dwarf2_read_section (objfile
, section
);
3230 info_ptr
= section
->buffer
;
3232 if (info_ptr
== NULL
)
3235 if (types_htab
== NULL
)
3236 types_htab
= allocate_signatured_type_table (objfile
);
3238 if (dwarf2_die_debug
)
3239 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
3241 end_ptr
= info_ptr
+ section
->size
;
3242 while (info_ptr
< end_ptr
)
3244 unsigned int offset
;
3245 unsigned int type_offset
;
3247 struct signatured_type
*type_sig
;
3249 gdb_byte
*ptr
= info_ptr
;
3250 struct comp_unit_head header
;
3252 offset
= ptr
- section
->buffer
;
3254 /* We need to read the type's signature in order to build the hash
3255 table, but we don't need anything else just yet. */
3257 ptr
= read_and_check_type_unit_head (&header
, section
, ptr
,
3258 &signature
, &type_offset
);
3260 /* Skip dummy type units. */
3261 if (ptr
>= end_ptr
|| peek_abbrev_code (objfile
->obfd
, ptr
) == 0)
3263 info_ptr
= info_ptr
+ header
.initial_length_size
+ header
.length
;
3267 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
3268 memset (type_sig
, 0, sizeof (*type_sig
));
3269 type_sig
->signature
= signature
;
3270 type_sig
->type_offset
= type_offset
;
3271 type_sig
->per_cu
.objfile
= objfile
;
3272 type_sig
->per_cu
.debug_types_section
= section
;
3273 type_sig
->per_cu
.offset
= offset
;
3275 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
3276 gdb_assert (slot
!= NULL
);
3279 const struct signatured_type
*dup_sig
= *slot
;
3281 complaint (&symfile_complaints
,
3282 _("debug type entry at offset 0x%x is duplicate to the "
3283 "entry at offset 0x%x, signature 0x%s"),
3284 offset
, dup_sig
->per_cu
.offset
,
3285 phex (signature
, sizeof (signature
)));
3286 gdb_assert (signature
== dup_sig
->signature
);
3290 if (dwarf2_die_debug
)
3291 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3292 offset
, phex (signature
, sizeof (signature
)));
3294 info_ptr
= info_ptr
+ header
.initial_length_size
+ header
.length
;
3298 dwarf2_per_objfile
->signatured_types
= types_htab
;
3300 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
3301 dwarf2_per_objfile
->all_type_units
3302 = obstack_alloc (&objfile
->objfile_obstack
,
3303 dwarf2_per_objfile
->n_type_units
3304 * sizeof (struct dwarf2_per_cu_data
*));
3305 iter
= &dwarf2_per_objfile
->all_type_units
[0];
3306 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
3307 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
3308 == dwarf2_per_objfile
->n_type_units
);
3313 /* Lookup a signature based type.
3314 Returns NULL if SIG is not present in the table. */
3316 static struct signatured_type
*
3317 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
3319 struct signatured_type find_entry
, *entry
;
3321 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3323 complaint (&symfile_complaints
,
3324 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
3328 find_entry
.signature
= sig
;
3329 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3333 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3336 init_cu_die_reader (struct die_reader_specs
*reader
,
3337 struct dwarf2_cu
*cu
)
3339 reader
->abfd
= cu
->objfile
->obfd
;
3341 if (cu
->per_cu
->debug_types_section
)
3343 gdb_assert (cu
->per_cu
->debug_types_section
->readin
);
3344 reader
->buffer
= cu
->per_cu
->debug_types_section
->buffer
;
3348 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3349 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
3353 /* Find the base address of the compilation unit for range lists and
3354 location lists. It will normally be specified by DW_AT_low_pc.
3355 In DWARF-3 draft 4, the base address could be overridden by
3356 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3357 compilation units with discontinuous ranges. */
3360 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3362 struct attribute
*attr
;
3365 cu
->base_address
= 0;
3367 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3370 cu
->base_address
= DW_ADDR (attr
);
3375 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3378 cu
->base_address
= DW_ADDR (attr
);
3384 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3385 to combine the common parts.
3386 Process compilation unit THIS_CU for a psymtab.
3387 SECTION is the section the CU/TU comes from,
3388 either .debug_info or .debug_types. */
3391 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3392 struct dwarf2_section_info
*section
,
3393 int is_debug_types_section
)
3395 struct objfile
*objfile
= this_cu
->objfile
;
3396 bfd
*abfd
= objfile
->obfd
;
3397 gdb_byte
*buffer
= section
->buffer
;
3398 gdb_byte
*info_ptr
= buffer
+ this_cu
->offset
;
3399 unsigned int buffer_size
= section
->size
;
3400 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3401 struct die_info
*comp_unit_die
;
3402 struct partial_symtab
*pst
;
3404 struct cleanup
*back_to_inner
;
3405 struct dwarf2_cu cu
;
3406 int has_children
, has_pc_info
;
3407 struct attribute
*attr
;
3408 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3409 struct die_reader_specs reader_specs
;
3410 const char *filename
;
3412 /* If this compilation unit was already read in, free the
3413 cached copy in order to read it in again. This is
3414 necessary because we skipped some symbols when we first
3415 read in the compilation unit (see load_partial_dies).
3416 This problem could be avoided, but the benefit is
3418 if (this_cu
->cu
!= NULL
)
3419 free_one_cached_comp_unit (this_cu
->cu
);
3421 /* Note that this is a pointer to our stack frame, being
3422 added to a global data structure. It will be cleaned up
3423 in free_stack_comp_unit when we finish with this
3424 compilation unit. */
3425 init_one_comp_unit (&cu
, this_cu
);
3426 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3428 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
, info_ptr
,
3429 is_debug_types_section
);
3431 /* Skip dummy compilation units. */
3432 if (info_ptr
>= buffer
+ buffer_size
3433 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3435 do_cleanups (back_to_inner
);
3439 cu
.list_in_scope
= &file_symbols
;
3441 /* Read the abbrevs for this compilation unit into a table. */
3442 dwarf2_read_abbrevs (&cu
);
3443 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3445 /* Read the compilation unit die. */
3446 init_cu_die_reader (&reader_specs
, &cu
);
3447 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3450 if (is_debug_types_section
)
3452 /* LENGTH has not been set yet for type units. */
3453 gdb_assert (this_cu
->offset
== cu
.header
.offset
);
3454 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3456 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3458 do_cleanups (back_to_inner
);
3462 prepare_one_comp_unit (&cu
, comp_unit_die
);
3464 /* Allocate a new partial symbol table structure. */
3465 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3466 if (attr
== NULL
|| !DW_STRING (attr
))
3469 filename
= DW_STRING (attr
);
3470 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3472 /* TEXTLOW and TEXTHIGH are set below. */
3474 objfile
->global_psymbols
.next
,
3475 objfile
->static_psymbols
.next
);
3476 pst
->psymtabs_addrmap_supported
= 1;
3478 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3480 pst
->dirname
= DW_STRING (attr
);
3482 pst
->read_symtab_private
= this_cu
;
3484 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3486 /* Store the function that reads in the rest of the symbol table. */
3487 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3489 this_cu
->v
.psymtab
= pst
;
3491 dwarf2_find_base_address (comp_unit_die
, &cu
);
3493 /* Possibly set the default values of LOWPC and HIGHPC from
3495 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3496 &best_highpc
, &cu
, pst
);
3497 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3498 /* Store the contiguous range if it is not empty; it can be empty for
3499 CUs with no code. */
3500 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3501 best_lowpc
+ baseaddr
,
3502 best_highpc
+ baseaddr
- 1, pst
);
3504 /* Check if comp unit has_children.
3505 If so, read the rest of the partial symbols from this comp unit.
3506 If not, there's no more debug_info for this comp unit. */
3509 struct partial_die_info
*first_die
;
3510 CORE_ADDR lowpc
, highpc
;
3512 lowpc
= ((CORE_ADDR
) -1);
3513 highpc
= ((CORE_ADDR
) 0);
3515 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3517 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3518 ! has_pc_info
, &cu
);
3520 /* If we didn't find a lowpc, set it to highpc to avoid
3521 complaints from `maint check'. */
3522 if (lowpc
== ((CORE_ADDR
) -1))
3525 /* If the compilation unit didn't have an explicit address range,
3526 then use the information extracted from its child dies. */
3530 best_highpc
= highpc
;
3533 pst
->textlow
= best_lowpc
+ baseaddr
;
3534 pst
->texthigh
= best_highpc
+ baseaddr
;
3536 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3537 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3538 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3539 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3540 sort_pst_symbols (pst
);
3542 if (is_debug_types_section
)
3544 /* It's not clear we want to do anything with stmt lists here.
3545 Waiting to see what gcc ultimately does. */
3549 /* Get the list of files included in the current compilation unit,
3550 and build a psymtab for each of them. */
3551 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3554 do_cleanups (back_to_inner
);
3557 /* Traversal function for htab_traverse_noresize.
3558 Process one .debug_types comp-unit. */
3561 process_type_comp_unit (void **slot
, void *info
)
3563 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3564 struct dwarf2_per_cu_data
*this_cu
;
3566 gdb_assert (info
== NULL
);
3567 this_cu
= &entry
->per_cu
;
3569 gdb_assert (this_cu
->debug_types_section
->readin
);
3570 process_psymtab_comp_unit (this_cu
, this_cu
->debug_types_section
, 1);
3575 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3576 Build partial symbol tables for the .debug_types comp-units. */
3579 build_type_psymtabs (struct objfile
*objfile
)
3581 if (! create_debug_types_hash_table (objfile
))
3584 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3585 process_type_comp_unit
, NULL
);
3588 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3591 psymtabs_addrmap_cleanup (void *o
)
3593 struct objfile
*objfile
= o
;
3595 objfile
->psymtabs_addrmap
= NULL
;
3598 /* Build the partial symbol table by doing a quick pass through the
3599 .debug_info and .debug_abbrev sections. */
3602 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3604 struct cleanup
*back_to
, *addrmap_cleanup
;
3605 struct obstack temp_obstack
;
3608 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3610 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3612 /* Any cached compilation units will be linked by the per-objfile
3613 read_in_chain. Make sure to free them when we're done. */
3614 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3616 build_type_psymtabs (objfile
);
3618 create_all_comp_units (objfile
);
3620 /* Create a temporary address map on a temporary obstack. We later
3621 copy this to the final obstack. */
3622 obstack_init (&temp_obstack
);
3623 make_cleanup_obstack_free (&temp_obstack
);
3624 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3625 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3627 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3629 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3631 process_psymtab_comp_unit (per_cu
, &dwarf2_per_objfile
->info
, 0);
3634 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3635 &objfile
->objfile_obstack
);
3636 discard_cleanups (addrmap_cleanup
);
3638 do_cleanups (back_to
);
3641 /* Load the partial DIEs for a secondary CU into memory. */
3644 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
3646 struct objfile
*objfile
= this_cu
->objfile
;
3647 bfd
*abfd
= objfile
->obfd
;
3649 struct die_info
*comp_unit_die
;
3650 struct dwarf2_cu
*cu
;
3651 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3653 struct die_reader_specs reader_specs
;
3655 struct dwarf2_section_info
*section
= &dwarf2_per_objfile
->info
;
3657 gdb_assert (! this_cu
->debug_types_section
);
3659 gdb_assert (section
->readin
);
3660 info_ptr
= section
->buffer
+ this_cu
->offset
;
3662 if (this_cu
->cu
== NULL
)
3664 cu
= xmalloc (sizeof (*cu
));
3665 init_one_comp_unit (cu
, this_cu
);
3669 /* If an error occurs while loading, release our storage. */
3670 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
3672 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
, info_ptr
,
3675 /* Skip dummy compilation units. */
3676 if (info_ptr
>= (section
->buffer
+ section
->size
)
3677 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3679 do_cleanups (free_cu_cleanup
);
3683 /* Link this CU into read_in_chain. */
3684 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3685 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3690 info_ptr
+= cu
->header
.first_die_offset
;
3693 /* Read the abbrevs for this compilation unit into a table. */
3694 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3695 dwarf2_read_abbrevs (cu
);
3696 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3698 /* Read the compilation unit die. */
3699 init_cu_die_reader (&reader_specs
, cu
);
3700 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3703 prepare_one_comp_unit (cu
, comp_unit_die
);
3705 /* Check if comp unit has_children.
3706 If so, read the rest of the partial symbols from this comp unit.
3707 If not, there's no more debug_info for this comp unit. */
3709 load_partial_dies (abfd
, section
->buffer
, info_ptr
, 0, cu
);
3711 do_cleanups (free_abbrevs_cleanup
);
3715 /* We've successfully allocated this compilation unit. Let our
3716 caller clean it up when finished with it. */
3717 discard_cleanups (free_cu_cleanup
);
3721 /* Create a list of all compilation units in OBJFILE.
3722 This is only done for -readnow and building partial symtabs. */
3725 create_all_comp_units (struct objfile
*objfile
)
3729 struct dwarf2_per_cu_data
**all_comp_units
;
3732 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3733 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3737 all_comp_units
= xmalloc (n_allocated
3738 * sizeof (struct dwarf2_per_cu_data
*));
3740 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
3741 + dwarf2_per_objfile
->info
.size
)
3743 unsigned int length
, initial_length_size
;
3744 struct dwarf2_per_cu_data
*this_cu
;
3745 unsigned int offset
;
3747 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3749 /* Read just enough information to find out where the next
3750 compilation unit is. */
3751 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3752 &initial_length_size
);
3754 /* Save the compilation unit for later lookup. */
3755 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3756 sizeof (struct dwarf2_per_cu_data
));
3757 memset (this_cu
, 0, sizeof (*this_cu
));
3758 this_cu
->offset
= offset
;
3759 this_cu
->length
= length
+ initial_length_size
;
3760 this_cu
->objfile
= objfile
;
3762 if (n_comp_units
== n_allocated
)
3765 all_comp_units
= xrealloc (all_comp_units
,
3767 * sizeof (struct dwarf2_per_cu_data
*));
3769 all_comp_units
[n_comp_units
++] = this_cu
;
3771 info_ptr
= info_ptr
+ this_cu
->length
;
3774 dwarf2_per_objfile
->all_comp_units
3775 = obstack_alloc (&objfile
->objfile_obstack
,
3776 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3777 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3778 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3779 xfree (all_comp_units
);
3780 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3783 /* Process all loaded DIEs for compilation unit CU, starting at
3784 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3785 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3786 DW_AT_ranges). If NEED_PC is set, then this function will set
3787 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3788 and record the covered ranges in the addrmap. */
3791 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3792 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3794 struct partial_die_info
*pdi
;
3796 /* Now, march along the PDI's, descending into ones which have
3797 interesting children but skipping the children of the other ones,
3798 until we reach the end of the compilation unit. */
3804 fixup_partial_die (pdi
, cu
);
3806 /* Anonymous namespaces or modules have no name but have interesting
3807 children, so we need to look at them. Ditto for anonymous
3810 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3811 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3815 case DW_TAG_subprogram
:
3816 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3818 case DW_TAG_constant
:
3819 case DW_TAG_variable
:
3820 case DW_TAG_typedef
:
3821 case DW_TAG_union_type
:
3822 if (!pdi
->is_declaration
)
3824 add_partial_symbol (pdi
, cu
);
3827 case DW_TAG_class_type
:
3828 case DW_TAG_interface_type
:
3829 case DW_TAG_structure_type
:
3830 if (!pdi
->is_declaration
)
3832 add_partial_symbol (pdi
, cu
);
3835 case DW_TAG_enumeration_type
:
3836 if (!pdi
->is_declaration
)
3837 add_partial_enumeration (pdi
, cu
);
3839 case DW_TAG_base_type
:
3840 case DW_TAG_subrange_type
:
3841 /* File scope base type definitions are added to the partial
3843 add_partial_symbol (pdi
, cu
);
3845 case DW_TAG_namespace
:
3846 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3849 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3856 /* If the die has a sibling, skip to the sibling. */
3858 pdi
= pdi
->die_sibling
;
3862 /* Functions used to compute the fully scoped name of a partial DIE.
3864 Normally, this is simple. For C++, the parent DIE's fully scoped
3865 name is concatenated with "::" and the partial DIE's name. For
3866 Java, the same thing occurs except that "." is used instead of "::".
3867 Enumerators are an exception; they use the scope of their parent
3868 enumeration type, i.e. the name of the enumeration type is not
3869 prepended to the enumerator.
3871 There are two complexities. One is DW_AT_specification; in this
3872 case "parent" means the parent of the target of the specification,
3873 instead of the direct parent of the DIE. The other is compilers
3874 which do not emit DW_TAG_namespace; in this case we try to guess
3875 the fully qualified name of structure types from their members'
3876 linkage names. This must be done using the DIE's children rather
3877 than the children of any DW_AT_specification target. We only need
3878 to do this for structures at the top level, i.e. if the target of
3879 any DW_AT_specification (if any; otherwise the DIE itself) does not
3882 /* Compute the scope prefix associated with PDI's parent, in
3883 compilation unit CU. The result will be allocated on CU's
3884 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3885 field. NULL is returned if no prefix is necessary. */
3887 partial_die_parent_scope (struct partial_die_info
*pdi
,
3888 struct dwarf2_cu
*cu
)
3890 char *grandparent_scope
;
3891 struct partial_die_info
*parent
, *real_pdi
;
3893 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3894 then this means the parent of the specification DIE. */
3897 while (real_pdi
->has_specification
)
3898 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3900 parent
= real_pdi
->die_parent
;
3904 if (parent
->scope_set
)
3905 return parent
->scope
;
3907 fixup_partial_die (parent
, cu
);
3909 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3911 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3912 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3913 Work around this problem here. */
3914 if (cu
->language
== language_cplus
3915 && parent
->tag
== DW_TAG_namespace
3916 && strcmp (parent
->name
, "::") == 0
3917 && grandparent_scope
== NULL
)
3919 parent
->scope
= NULL
;
3920 parent
->scope_set
= 1;
3924 if (pdi
->tag
== DW_TAG_enumerator
)
3925 /* Enumerators should not get the name of the enumeration as a prefix. */
3926 parent
->scope
= grandparent_scope
;
3927 else if (parent
->tag
== DW_TAG_namespace
3928 || parent
->tag
== DW_TAG_module
3929 || parent
->tag
== DW_TAG_structure_type
3930 || parent
->tag
== DW_TAG_class_type
3931 || parent
->tag
== DW_TAG_interface_type
3932 || parent
->tag
== DW_TAG_union_type
3933 || parent
->tag
== DW_TAG_enumeration_type
)
3935 if (grandparent_scope
== NULL
)
3936 parent
->scope
= parent
->name
;
3938 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
3940 parent
->name
, 0, cu
);
3944 /* FIXME drow/2004-04-01: What should we be doing with
3945 function-local names? For partial symbols, we should probably be
3947 complaint (&symfile_complaints
,
3948 _("unhandled containing DIE tag %d for DIE at %d"),
3949 parent
->tag
, pdi
->offset
);
3950 parent
->scope
= grandparent_scope
;
3953 parent
->scope_set
= 1;
3954 return parent
->scope
;
3957 /* Return the fully scoped name associated with PDI, from compilation unit
3958 CU. The result will be allocated with malloc. */
3960 partial_die_full_name (struct partial_die_info
*pdi
,
3961 struct dwarf2_cu
*cu
)
3965 /* If this is a template instantiation, we can not work out the
3966 template arguments from partial DIEs. So, unfortunately, we have
3967 to go through the full DIEs. At least any work we do building
3968 types here will be reused if full symbols are loaded later. */
3969 if (pdi
->has_template_arguments
)
3971 fixup_partial_die (pdi
, cu
);
3973 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3975 struct die_info
*die
;
3976 struct attribute attr
;
3977 struct dwarf2_cu
*ref_cu
= cu
;
3980 attr
.form
= DW_FORM_ref_addr
;
3981 attr
.u
.addr
= pdi
->offset
;
3982 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3984 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3988 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3989 if (parent_scope
== NULL
)
3992 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3996 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3998 struct objfile
*objfile
= cu
->objfile
;
4000 char *actual_name
= NULL
;
4002 int built_actual_name
= 0;
4004 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4006 actual_name
= partial_die_full_name (pdi
, cu
);
4008 built_actual_name
= 1;
4010 if (actual_name
== NULL
)
4011 actual_name
= pdi
->name
;
4015 case DW_TAG_subprogram
:
4016 if (pdi
->is_external
|| cu
->language
== language_ada
)
4018 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
4019 of the global scope. But in Ada, we want to be able to access
4020 nested procedures globally. So all Ada subprograms are stored
4021 in the global scope. */
4022 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4023 mst_text, objfile); */
4024 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4026 VAR_DOMAIN
, LOC_BLOCK
,
4027 &objfile
->global_psymbols
,
4028 0, pdi
->lowpc
+ baseaddr
,
4029 cu
->language
, objfile
);
4033 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4034 mst_file_text, objfile); */
4035 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4037 VAR_DOMAIN
, LOC_BLOCK
,
4038 &objfile
->static_psymbols
,
4039 0, pdi
->lowpc
+ baseaddr
,
4040 cu
->language
, objfile
);
4043 case DW_TAG_constant
:
4045 struct psymbol_allocation_list
*list
;
4047 if (pdi
->is_external
)
4048 list
= &objfile
->global_psymbols
;
4050 list
= &objfile
->static_psymbols
;
4051 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4052 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
4053 list
, 0, 0, cu
->language
, objfile
);
4056 case DW_TAG_variable
:
4058 addr
= decode_locdesc (pdi
->locdesc
, cu
);
4062 && !dwarf2_per_objfile
->has_section_at_zero
)
4064 /* A global or static variable may also have been stripped
4065 out by the linker if unused, in which case its address
4066 will be nullified; do not add such variables into partial
4067 symbol table then. */
4069 else if (pdi
->is_external
)
4072 Don't enter into the minimal symbol tables as there is
4073 a minimal symbol table entry from the ELF symbols already.
4074 Enter into partial symbol table if it has a location
4075 descriptor or a type.
4076 If the location descriptor is missing, new_symbol will create
4077 a LOC_UNRESOLVED symbol, the address of the variable will then
4078 be determined from the minimal symbol table whenever the variable
4080 The address for the partial symbol table entry is not
4081 used by GDB, but it comes in handy for debugging partial symbol
4084 if (pdi
->locdesc
|| pdi
->has_type
)
4085 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4087 VAR_DOMAIN
, LOC_STATIC
,
4088 &objfile
->global_psymbols
,
4090 cu
->language
, objfile
);
4094 /* Static Variable. Skip symbols without location descriptors. */
4095 if (pdi
->locdesc
== NULL
)
4097 if (built_actual_name
)
4098 xfree (actual_name
);
4101 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
4102 mst_file_data, objfile); */
4103 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4105 VAR_DOMAIN
, LOC_STATIC
,
4106 &objfile
->static_psymbols
,
4108 cu
->language
, objfile
);
4111 case DW_TAG_typedef
:
4112 case DW_TAG_base_type
:
4113 case DW_TAG_subrange_type
:
4114 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4116 VAR_DOMAIN
, LOC_TYPEDEF
,
4117 &objfile
->static_psymbols
,
4118 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4120 case DW_TAG_namespace
:
4121 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4123 VAR_DOMAIN
, LOC_TYPEDEF
,
4124 &objfile
->global_psymbols
,
4125 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4127 case DW_TAG_class_type
:
4128 case DW_TAG_interface_type
:
4129 case DW_TAG_structure_type
:
4130 case DW_TAG_union_type
:
4131 case DW_TAG_enumeration_type
:
4132 /* Skip external references. The DWARF standard says in the section
4133 about "Structure, Union, and Class Type Entries": "An incomplete
4134 structure, union or class type is represented by a structure,
4135 union or class entry that does not have a byte size attribute
4136 and that has a DW_AT_declaration attribute." */
4137 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
4139 if (built_actual_name
)
4140 xfree (actual_name
);
4144 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
4145 static vs. global. */
4146 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4148 STRUCT_DOMAIN
, LOC_TYPEDEF
,
4149 (cu
->language
== language_cplus
4150 || cu
->language
== language_java
)
4151 ? &objfile
->global_psymbols
4152 : &objfile
->static_psymbols
,
4153 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4156 case DW_TAG_enumerator
:
4157 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4159 VAR_DOMAIN
, LOC_CONST
,
4160 (cu
->language
== language_cplus
4161 || cu
->language
== language_java
)
4162 ? &objfile
->global_psymbols
4163 : &objfile
->static_psymbols
,
4164 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4170 if (built_actual_name
)
4171 xfree (actual_name
);
4174 /* Read a partial die corresponding to a namespace; also, add a symbol
4175 corresponding to that namespace to the symbol table. NAMESPACE is
4176 the name of the enclosing namespace. */
4179 add_partial_namespace (struct partial_die_info
*pdi
,
4180 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4181 int need_pc
, struct dwarf2_cu
*cu
)
4183 /* Add a symbol for the namespace. */
4185 add_partial_symbol (pdi
, cu
);
4187 /* Now scan partial symbols in that namespace. */
4189 if (pdi
->has_children
)
4190 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4193 /* Read a partial die corresponding to a Fortran module. */
4196 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
4197 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4199 /* Now scan partial symbols in that module. */
4201 if (pdi
->has_children
)
4202 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4205 /* Read a partial die corresponding to a subprogram and create a partial
4206 symbol for that subprogram. When the CU language allows it, this
4207 routine also defines a partial symbol for each nested subprogram
4208 that this subprogram contains.
4210 DIE my also be a lexical block, in which case we simply search
4211 recursively for suprograms defined inside that lexical block.
4212 Again, this is only performed when the CU language allows this
4213 type of definitions. */
4216 add_partial_subprogram (struct partial_die_info
*pdi
,
4217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4218 int need_pc
, struct dwarf2_cu
*cu
)
4220 if (pdi
->tag
== DW_TAG_subprogram
)
4222 if (pdi
->has_pc_info
)
4224 if (pdi
->lowpc
< *lowpc
)
4225 *lowpc
= pdi
->lowpc
;
4226 if (pdi
->highpc
> *highpc
)
4227 *highpc
= pdi
->highpc
;
4231 struct objfile
*objfile
= cu
->objfile
;
4233 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4234 SECT_OFF_TEXT (objfile
));
4235 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4236 pdi
->lowpc
+ baseaddr
,
4237 pdi
->highpc
- 1 + baseaddr
,
4238 cu
->per_cu
->v
.psymtab
);
4240 if (!pdi
->is_declaration
)
4241 /* Ignore subprogram DIEs that do not have a name, they are
4242 illegal. Do not emit a complaint at this point, we will
4243 do so when we convert this psymtab into a symtab. */
4245 add_partial_symbol (pdi
, cu
);
4249 if (! pdi
->has_children
)
4252 if (cu
->language
== language_ada
)
4254 pdi
= pdi
->die_child
;
4257 fixup_partial_die (pdi
, cu
);
4258 if (pdi
->tag
== DW_TAG_subprogram
4259 || pdi
->tag
== DW_TAG_lexical_block
)
4260 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4261 pdi
= pdi
->die_sibling
;
4266 /* Read a partial die corresponding to an enumeration type. */
4269 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4270 struct dwarf2_cu
*cu
)
4272 struct partial_die_info
*pdi
;
4274 if (enum_pdi
->name
!= NULL
)
4275 add_partial_symbol (enum_pdi
, cu
);
4277 pdi
= enum_pdi
->die_child
;
4280 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4281 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
4283 add_partial_symbol (pdi
, cu
);
4284 pdi
= pdi
->die_sibling
;
4288 /* Return the initial uleb128 in the die at INFO_PTR. */
4291 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
4293 unsigned int bytes_read
;
4295 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4298 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4299 Return the corresponding abbrev, or NULL if the number is zero (indicating
4300 an empty DIE). In either case *BYTES_READ will be set to the length of
4301 the initial number. */
4303 static struct abbrev_info
*
4304 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
4305 struct dwarf2_cu
*cu
)
4307 bfd
*abfd
= cu
->objfile
->obfd
;
4308 unsigned int abbrev_number
;
4309 struct abbrev_info
*abbrev
;
4311 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4313 if (abbrev_number
== 0)
4316 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4319 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4320 abbrev_number
, bfd_get_filename (abfd
));
4326 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4327 Returns a pointer to the end of a series of DIEs, terminated by an empty
4328 DIE. Any children of the skipped DIEs will also be skipped. */
4331 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4333 struct abbrev_info
*abbrev
;
4334 unsigned int bytes_read
;
4338 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4340 return info_ptr
+ bytes_read
;
4342 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4346 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4347 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4348 abbrev corresponding to that skipped uleb128 should be passed in
4349 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4353 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4354 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4356 unsigned int bytes_read
;
4357 struct attribute attr
;
4358 bfd
*abfd
= cu
->objfile
->obfd
;
4359 unsigned int form
, i
;
4361 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4363 /* The only abbrev we care about is DW_AT_sibling. */
4364 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4366 read_attribute (&attr
, &abbrev
->attrs
[i
],
4367 abfd
, info_ptr
, cu
);
4368 if (attr
.form
== DW_FORM_ref_addr
)
4369 complaint (&symfile_complaints
,
4370 _("ignoring absolute DW_AT_sibling"));
4372 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4375 /* If it isn't DW_AT_sibling, skip this attribute. */
4376 form
= abbrev
->attrs
[i
].form
;
4380 case DW_FORM_ref_addr
:
4381 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4382 and later it is offset sized. */
4383 if (cu
->header
.version
== 2)
4384 info_ptr
+= cu
->header
.addr_size
;
4386 info_ptr
+= cu
->header
.offset_size
;
4389 info_ptr
+= cu
->header
.addr_size
;
4396 case DW_FORM_flag_present
:
4408 case DW_FORM_ref_sig8
:
4411 case DW_FORM_string
:
4412 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4413 info_ptr
+= bytes_read
;
4415 case DW_FORM_sec_offset
:
4417 info_ptr
+= cu
->header
.offset_size
;
4419 case DW_FORM_exprloc
:
4421 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4422 info_ptr
+= bytes_read
;
4424 case DW_FORM_block1
:
4425 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4427 case DW_FORM_block2
:
4428 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4430 case DW_FORM_block4
:
4431 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4435 case DW_FORM_ref_udata
:
4436 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4438 case DW_FORM_indirect
:
4439 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4440 info_ptr
+= bytes_read
;
4441 /* We need to continue parsing from here, so just go back to
4443 goto skip_attribute
;
4446 error (_("Dwarf Error: Cannot handle %s "
4447 "in DWARF reader [in module %s]"),
4448 dwarf_form_name (form
),
4449 bfd_get_filename (abfd
));
4453 if (abbrev
->has_children
)
4454 return skip_children (buffer
, info_ptr
, cu
);
4459 /* Locate ORIG_PDI's sibling.
4460 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4464 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4465 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4466 bfd
*abfd
, struct dwarf2_cu
*cu
)
4468 /* Do we know the sibling already? */
4470 if (orig_pdi
->sibling
)
4471 return orig_pdi
->sibling
;
4473 /* Are there any children to deal with? */
4475 if (!orig_pdi
->has_children
)
4478 /* Skip the children the long way. */
4480 return skip_children (buffer
, info_ptr
, cu
);
4483 /* Expand this partial symbol table into a full symbol table. */
4486 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4492 warning (_("bug: psymtab for %s is already read in."),
4499 printf_filtered (_("Reading in symbols for %s..."),
4501 gdb_flush (gdb_stdout
);
4504 /* Restore our global data. */
4505 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4506 dwarf2_objfile_data_key
);
4508 /* If this psymtab is constructed from a debug-only objfile, the
4509 has_section_at_zero flag will not necessarily be correct. We
4510 can get the correct value for this flag by looking at the data
4511 associated with the (presumably stripped) associated objfile. */
4512 if (pst
->objfile
->separate_debug_objfile_backlink
)
4514 struct dwarf2_per_objfile
*dpo_backlink
4515 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4516 dwarf2_objfile_data_key
);
4518 dwarf2_per_objfile
->has_section_at_zero
4519 = dpo_backlink
->has_section_at_zero
;
4522 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4524 psymtab_to_symtab_1 (pst
);
4526 /* Finish up the debug error message. */
4528 printf_filtered (_("done.\n"));
4533 /* Reading in full CUs. */
4535 /* Add PER_CU to the queue. */
4538 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4540 struct dwarf2_queue_item
*item
;
4543 item
= xmalloc (sizeof (*item
));
4544 item
->per_cu
= per_cu
;
4547 if (dwarf2_queue
== NULL
)
4548 dwarf2_queue
= item
;
4550 dwarf2_queue_tail
->next
= item
;
4552 dwarf2_queue_tail
= item
;
4555 /* Process the queue. */
4558 process_queue (void)
4560 struct dwarf2_queue_item
*item
, *next_item
;
4562 /* The queue starts out with one item, but following a DIE reference
4563 may load a new CU, adding it to the end of the queue. */
4564 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4566 if (dwarf2_per_objfile
->using_index
4567 ? !item
->per_cu
->v
.quick
->symtab
4568 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4569 process_full_comp_unit (item
->per_cu
);
4571 item
->per_cu
->queued
= 0;
4572 next_item
= item
->next
;
4576 dwarf2_queue_tail
= NULL
;
4579 /* Free all allocated queue entries. This function only releases anything if
4580 an error was thrown; if the queue was processed then it would have been
4581 freed as we went along. */
4584 dwarf2_release_queue (void *dummy
)
4586 struct dwarf2_queue_item
*item
, *last
;
4588 item
= dwarf2_queue
;
4591 /* Anything still marked queued is likely to be in an
4592 inconsistent state, so discard it. */
4593 if (item
->per_cu
->queued
)
4595 if (item
->per_cu
->cu
!= NULL
)
4596 free_one_cached_comp_unit (item
->per_cu
->cu
);
4597 item
->per_cu
->queued
= 0;
4605 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4608 /* Read in full symbols for PST, and anything it depends on. */
4611 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4613 struct dwarf2_per_cu_data
*per_cu
;
4614 struct cleanup
*back_to
;
4617 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4618 if (!pst
->dependencies
[i
]->readin
)
4620 /* Inform about additional files that need to be read in. */
4623 /* FIXME: i18n: Need to make this a single string. */
4624 fputs_filtered (" ", gdb_stdout
);
4626 fputs_filtered ("and ", gdb_stdout
);
4628 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4629 wrap_here (""); /* Flush output. */
4630 gdb_flush (gdb_stdout
);
4632 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4635 per_cu
= pst
->read_symtab_private
;
4639 /* It's an include file, no symbols to read for it.
4640 Everything is in the parent symtab. */
4645 dw2_do_instantiate_symtab (per_cu
);
4648 /* Load the DIEs associated with PER_CU into memory. */
4651 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4653 struct objfile
*objfile
= per_cu
->objfile
;
4654 bfd
*abfd
= objfile
->obfd
;
4655 struct dwarf2_cu
*cu
;
4656 unsigned int offset
;
4657 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4658 struct cleanup
*free_cu_cleanup
= NULL
;
4659 struct attribute
*attr
;
4662 gdb_assert (! per_cu
->debug_types_section
);
4664 /* Set local variables from the partial symbol table info. */
4665 offset
= per_cu
->offset
;
4667 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4668 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4669 beg_of_comp_unit
= info_ptr
;
4671 if (per_cu
->cu
== NULL
)
4673 cu
= xmalloc (sizeof (*cu
));
4674 init_one_comp_unit (cu
, per_cu
);
4678 /* If an error occurs while loading, release our storage. */
4679 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4681 /* Read in the comp_unit header. */
4682 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4684 /* Skip dummy compilation units. */
4685 if (info_ptr
>= (dwarf2_per_objfile
->info
.buffer
4686 + dwarf2_per_objfile
->info
.size
)
4687 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4689 do_cleanups (free_cu_cleanup
);
4693 /* Complete the cu_header. */
4694 cu
->header
.offset
= offset
;
4695 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4697 /* Link this CU into read_in_chain. */
4698 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4699 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4704 info_ptr
+= cu
->header
.first_die_offset
;
4707 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4709 /* We try not to read any attributes in this function, because not
4710 all CUs needed for references have been loaded yet, and symbol
4711 table processing isn't initialized. But we have to set the CU language,
4712 or we won't be able to build types correctly. */
4713 prepare_one_comp_unit (cu
, cu
->dies
);
4715 /* Similarly, if we do not read the producer, we can not apply
4716 producer-specific interpretation. */
4717 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4719 cu
->producer
= DW_STRING (attr
);
4723 /* We've successfully allocated this compilation unit. Let our
4724 caller clean it up when finished with it. */
4725 discard_cleanups (free_cu_cleanup
);
4729 /* Add a DIE to the delayed physname list. */
4732 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4733 const char *name
, struct die_info
*die
,
4734 struct dwarf2_cu
*cu
)
4736 struct delayed_method_info mi
;
4738 mi
.fnfield_index
= fnfield_index
;
4742 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4745 /* A cleanup for freeing the delayed method list. */
4748 free_delayed_list (void *ptr
)
4750 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4751 if (cu
->method_list
!= NULL
)
4753 VEC_free (delayed_method_info
, cu
->method_list
);
4754 cu
->method_list
= NULL
;
4758 /* Compute the physnames of any methods on the CU's method list.
4760 The computation of method physnames is delayed in order to avoid the
4761 (bad) condition that one of the method's formal parameters is of an as yet
4765 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4768 struct delayed_method_info
*mi
;
4769 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4771 const char *physname
;
4772 struct fn_fieldlist
*fn_flp
4773 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4774 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4775 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4779 /* Generate full symbol information for PER_CU, whose DIEs have
4780 already been loaded into memory. */
4783 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4785 struct dwarf2_cu
*cu
= per_cu
->cu
;
4786 struct objfile
*objfile
= per_cu
->objfile
;
4787 CORE_ADDR lowpc
, highpc
;
4788 struct symtab
*symtab
;
4789 struct cleanup
*back_to
, *delayed_list_cleanup
;
4792 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4795 back_to
= make_cleanup (really_free_pendings
, NULL
);
4796 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4798 cu
->list_in_scope
= &file_symbols
;
4800 /* Do line number decoding in read_file_scope () */
4801 process_die (cu
->dies
, cu
);
4803 /* Now that we have processed all the DIEs in the CU, all the types
4804 should be complete, and it should now be safe to compute all of the
4806 compute_delayed_physnames (cu
);
4807 do_cleanups (delayed_list_cleanup
);
4809 /* Some compilers don't define a DW_AT_high_pc attribute for the
4810 compilation unit. If the DW_AT_high_pc is missing, synthesize
4811 it, by scanning the DIE's below the compilation unit. */
4812 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4814 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4818 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
4820 /* Set symtab language to language from DW_AT_language. If the
4821 compilation is from a C file generated by language preprocessors, do
4822 not set the language if it was already deduced by start_subfile. */
4823 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4824 symtab
->language
= cu
->language
;
4826 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
4827 produce DW_AT_location with location lists but it can be possibly
4828 invalid without -fvar-tracking.
4830 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
4831 needed, it would be wrong due to missing DW_AT_producer there.
4833 Still one can confuse GDB by using non-standard GCC compilation
4834 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
4836 if (cu
->has_loclist
&& gcc_4_minor
>= 0)
4837 symtab
->locations_valid
= 1;
4839 if (gcc_4_minor
>= 5)
4840 symtab
->epilogue_unwind_valid
= 1;
4842 symtab
->call_site_htab
= cu
->call_site_htab
;
4845 if (dwarf2_per_objfile
->using_index
)
4846 per_cu
->v
.quick
->symtab
= symtab
;
4849 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4850 pst
->symtab
= symtab
;
4854 do_cleanups (back_to
);
4857 /* Process a die and its children. */
4860 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4864 case DW_TAG_padding
:
4866 case DW_TAG_compile_unit
:
4867 read_file_scope (die
, cu
);
4869 case DW_TAG_type_unit
:
4870 read_type_unit_scope (die
, cu
);
4872 case DW_TAG_subprogram
:
4873 case DW_TAG_inlined_subroutine
:
4874 read_func_scope (die
, cu
);
4876 case DW_TAG_lexical_block
:
4877 case DW_TAG_try_block
:
4878 case DW_TAG_catch_block
:
4879 read_lexical_block_scope (die
, cu
);
4881 case DW_TAG_GNU_call_site
:
4882 read_call_site_scope (die
, cu
);
4884 case DW_TAG_class_type
:
4885 case DW_TAG_interface_type
:
4886 case DW_TAG_structure_type
:
4887 case DW_TAG_union_type
:
4888 process_structure_scope (die
, cu
);
4890 case DW_TAG_enumeration_type
:
4891 process_enumeration_scope (die
, cu
);
4894 /* These dies have a type, but processing them does not create
4895 a symbol or recurse to process the children. Therefore we can
4896 read them on-demand through read_type_die. */
4897 case DW_TAG_subroutine_type
:
4898 case DW_TAG_set_type
:
4899 case DW_TAG_array_type
:
4900 case DW_TAG_pointer_type
:
4901 case DW_TAG_ptr_to_member_type
:
4902 case DW_TAG_reference_type
:
4903 case DW_TAG_string_type
:
4906 case DW_TAG_base_type
:
4907 case DW_TAG_subrange_type
:
4908 case DW_TAG_typedef
:
4909 /* Add a typedef symbol for the type definition, if it has a
4911 new_symbol (die
, read_type_die (die
, cu
), cu
);
4913 case DW_TAG_common_block
:
4914 read_common_block (die
, cu
);
4916 case DW_TAG_common_inclusion
:
4918 case DW_TAG_namespace
:
4919 processing_has_namespace_info
= 1;
4920 read_namespace (die
, cu
);
4923 processing_has_namespace_info
= 1;
4924 read_module (die
, cu
);
4926 case DW_TAG_imported_declaration
:
4927 case DW_TAG_imported_module
:
4928 processing_has_namespace_info
= 1;
4929 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4930 || cu
->language
!= language_fortran
))
4931 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4932 dwarf_tag_name (die
->tag
));
4933 read_import_statement (die
, cu
);
4936 new_symbol (die
, NULL
, cu
);
4941 /* A helper function for dwarf2_compute_name which determines whether DIE
4942 needs to have the name of the scope prepended to the name listed in the
4946 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4948 struct attribute
*attr
;
4952 case DW_TAG_namespace
:
4953 case DW_TAG_typedef
:
4954 case DW_TAG_class_type
:
4955 case DW_TAG_interface_type
:
4956 case DW_TAG_structure_type
:
4957 case DW_TAG_union_type
:
4958 case DW_TAG_enumeration_type
:
4959 case DW_TAG_enumerator
:
4960 case DW_TAG_subprogram
:
4964 case DW_TAG_variable
:
4965 case DW_TAG_constant
:
4966 /* We only need to prefix "globally" visible variables. These include
4967 any variable marked with DW_AT_external or any variable that
4968 lives in a namespace. [Variables in anonymous namespaces
4969 require prefixing, but they are not DW_AT_external.] */
4971 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4973 struct dwarf2_cu
*spec_cu
= cu
;
4975 return die_needs_namespace (die_specification (die
, &spec_cu
),
4979 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4980 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4981 && die
->parent
->tag
!= DW_TAG_module
)
4983 /* A variable in a lexical block of some kind does not need a
4984 namespace, even though in C++ such variables may be external
4985 and have a mangled name. */
4986 if (die
->parent
->tag
== DW_TAG_lexical_block
4987 || die
->parent
->tag
== DW_TAG_try_block
4988 || die
->parent
->tag
== DW_TAG_catch_block
4989 || die
->parent
->tag
== DW_TAG_subprogram
)
4998 /* Retrieve the last character from a mem_file. */
5001 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
5003 char *last_char_p
= (char *) object
;
5006 *last_char_p
= buffer
[length
- 1];
5009 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
5010 compute the physname for the object, which include a method's
5011 formal parameters (C++/Java) and return type (Java).
5013 For Ada, return the DIE's linkage name rather than the fully qualified
5014 name. PHYSNAME is ignored..
5016 The result is allocated on the objfile_obstack and canonicalized. */
5019 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
5022 struct objfile
*objfile
= cu
->objfile
;
5025 name
= dwarf2_name (die
, cu
);
5027 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
5028 compute it by typename_concat inside GDB. */
5029 if (cu
->language
== language_ada
5030 || (cu
->language
== language_fortran
&& physname
))
5032 /* For Ada unit, we prefer the linkage name over the name, as
5033 the former contains the exported name, which the user expects
5034 to be able to reference. Ideally, we want the user to be able
5035 to reference this entity using either natural or linkage name,
5036 but we haven't started looking at this enhancement yet. */
5037 struct attribute
*attr
;
5039 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5041 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5042 if (attr
&& DW_STRING (attr
))
5043 return DW_STRING (attr
);
5046 /* These are the only languages we know how to qualify names in. */
5048 && (cu
->language
== language_cplus
|| cu
->language
== language_java
5049 || cu
->language
== language_fortran
))
5051 if (die_needs_namespace (die
, cu
))
5055 struct ui_file
*buf
;
5057 prefix
= determine_prefix (die
, cu
);
5058 buf
= mem_fileopen ();
5059 if (*prefix
!= '\0')
5061 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
5064 fputs_unfiltered (prefixed_name
, buf
);
5065 xfree (prefixed_name
);
5068 fputs_unfiltered (name
, buf
);
5070 /* Template parameters may be specified in the DIE's DW_AT_name, or
5071 as children with DW_TAG_template_type_param or
5072 DW_TAG_value_type_param. If the latter, add them to the name
5073 here. If the name already has template parameters, then
5074 skip this step; some versions of GCC emit both, and
5075 it is more efficient to use the pre-computed name.
5077 Something to keep in mind about this process: it is very
5078 unlikely, or in some cases downright impossible, to produce
5079 something that will match the mangled name of a function.
5080 If the definition of the function has the same debug info,
5081 we should be able to match up with it anyway. But fallbacks
5082 using the minimal symbol, for instance to find a method
5083 implemented in a stripped copy of libstdc++, will not work.
5084 If we do not have debug info for the definition, we will have to
5085 match them up some other way.
5087 When we do name matching there is a related problem with function
5088 templates; two instantiated function templates are allowed to
5089 differ only by their return types, which we do not add here. */
5091 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
5093 struct attribute
*attr
;
5094 struct die_info
*child
;
5097 die
->building_fullname
= 1;
5099 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
5104 struct dwarf2_locexpr_baton
*baton
;
5107 if (child
->tag
!= DW_TAG_template_type_param
5108 && child
->tag
!= DW_TAG_template_value_param
)
5113 fputs_unfiltered ("<", buf
);
5117 fputs_unfiltered (", ", buf
);
5119 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
5122 complaint (&symfile_complaints
,
5123 _("template parameter missing DW_AT_type"));
5124 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
5127 type
= die_type (child
, cu
);
5129 if (child
->tag
== DW_TAG_template_type_param
)
5131 c_print_type (type
, "", buf
, -1, 0);
5135 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
5138 complaint (&symfile_complaints
,
5139 _("template parameter missing "
5140 "DW_AT_const_value"));
5141 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
5145 dwarf2_const_value_attr (attr
, type
, name
,
5146 &cu
->comp_unit_obstack
, cu
,
5147 &value
, &bytes
, &baton
);
5149 if (TYPE_NOSIGN (type
))
5150 /* GDB prints characters as NUMBER 'CHAR'. If that's
5151 changed, this can use value_print instead. */
5152 c_printchar (value
, type
, buf
);
5155 struct value_print_options opts
;
5158 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
5162 else if (bytes
!= NULL
)
5164 v
= allocate_value (type
);
5165 memcpy (value_contents_writeable (v
), bytes
,
5166 TYPE_LENGTH (type
));
5169 v
= value_from_longest (type
, value
);
5171 /* Specify decimal so that we do not depend on
5173 get_formatted_print_options (&opts
, 'd');
5175 value_print (v
, buf
, &opts
);
5181 die
->building_fullname
= 0;
5185 /* Close the argument list, with a space if necessary
5186 (nested templates). */
5187 char last_char
= '\0';
5188 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
5189 if (last_char
== '>')
5190 fputs_unfiltered (" >", buf
);
5192 fputs_unfiltered (">", buf
);
5196 /* For Java and C++ methods, append formal parameter type
5197 information, if PHYSNAME. */
5199 if (physname
&& die
->tag
== DW_TAG_subprogram
5200 && (cu
->language
== language_cplus
5201 || cu
->language
== language_java
))
5203 struct type
*type
= read_type_die (die
, cu
);
5205 c_type_print_args (type
, buf
, 1, cu
->language
);
5207 if (cu
->language
== language_java
)
5209 /* For java, we must append the return type to method
5211 if (die
->tag
== DW_TAG_subprogram
)
5212 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
5215 else if (cu
->language
== language_cplus
)
5217 /* Assume that an artificial first parameter is
5218 "this", but do not crash if it is not. RealView
5219 marks unnamed (and thus unused) parameters as
5220 artificial; there is no way to differentiate
5222 if (TYPE_NFIELDS (type
) > 0
5223 && TYPE_FIELD_ARTIFICIAL (type
, 0)
5224 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
5225 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
5227 fputs_unfiltered (" const", buf
);
5231 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
5233 ui_file_delete (buf
);
5235 if (cu
->language
== language_cplus
)
5238 = dwarf2_canonicalize_name (name
, cu
,
5239 &objfile
->objfile_obstack
);
5250 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5251 If scope qualifiers are appropriate they will be added. The result
5252 will be allocated on the objfile_obstack, or NULL if the DIE does
5253 not have a name. NAME may either be from a previous call to
5254 dwarf2_name or NULL.
5256 The output string will be canonicalized (if C++/Java). */
5259 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5261 return dwarf2_compute_name (name
, die
, cu
, 0);
5264 /* Construct a physname for the given DIE in CU. NAME may either be
5265 from a previous call to dwarf2_name or NULL. The result will be
5266 allocated on the objfile_objstack or NULL if the DIE does not have a
5269 The output string will be canonicalized (if C++/Java). */
5272 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5274 struct objfile
*objfile
= cu
->objfile
;
5275 struct attribute
*attr
;
5276 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
5277 struct cleanup
*back_to
;
5280 /* In this case dwarf2_compute_name is just a shortcut not building anything
5282 if (!die_needs_namespace (die
, cu
))
5283 return dwarf2_compute_name (name
, die
, cu
, 1);
5285 back_to
= make_cleanup (null_cleanup
, NULL
);
5287 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5289 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5291 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
5293 if (attr
&& DW_STRING (attr
))
5297 mangled
= DW_STRING (attr
);
5299 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
5300 type. It is easier for GDB users to search for such functions as
5301 `name(params)' than `long name(params)'. In such case the minimal
5302 symbol names do not match the full symbol names but for template
5303 functions there is never a need to look up their definition from their
5304 declaration so the only disadvantage remains the minimal symbol
5305 variant `long name(params)' does not have the proper inferior type.
5308 demangled
= cplus_demangle (mangled
, (DMGL_PARAMS
| DMGL_ANSI
5309 | (cu
->language
== language_java
5310 ? DMGL_JAVA
| DMGL_RET_POSTFIX
5314 make_cleanup (xfree
, demangled
);
5324 if (canon
== NULL
|| check_physname
)
5326 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
5328 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
5330 /* It may not mean a bug in GDB. The compiler could also
5331 compute DW_AT_linkage_name incorrectly. But in such case
5332 GDB would need to be bug-to-bug compatible. */
5334 complaint (&symfile_complaints
,
5335 _("Computed physname <%s> does not match demangled <%s> "
5336 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
5337 physname
, canon
, mangled
, die
->offset
, objfile
->name
);
5339 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
5340 is available here - over computed PHYSNAME. It is safer
5341 against both buggy GDB and buggy compilers. */
5355 retval
= obsavestring (retval
, strlen (retval
),
5356 &objfile
->objfile_obstack
);
5358 do_cleanups (back_to
);
5362 /* Read the import statement specified by the given die and record it. */
5365 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
5367 struct objfile
*objfile
= cu
->objfile
;
5368 struct attribute
*import_attr
;
5369 struct die_info
*imported_die
, *child_die
;
5370 struct dwarf2_cu
*imported_cu
;
5371 const char *imported_name
;
5372 const char *imported_name_prefix
;
5373 const char *canonical_name
;
5374 const char *import_alias
;
5375 const char *imported_declaration
= NULL
;
5376 const char *import_prefix
;
5377 VEC (const_char_ptr
) *excludes
= NULL
;
5378 struct cleanup
*cleanups
;
5382 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5383 if (import_attr
== NULL
)
5385 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5386 dwarf_tag_name (die
->tag
));
5391 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
5392 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5393 if (imported_name
== NULL
)
5395 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5397 The import in the following code:
5411 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5412 <52> DW_AT_decl_file : 1
5413 <53> DW_AT_decl_line : 6
5414 <54> DW_AT_import : <0x75>
5415 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5417 <5b> DW_AT_decl_file : 1
5418 <5c> DW_AT_decl_line : 2
5419 <5d> DW_AT_type : <0x6e>
5421 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5422 <76> DW_AT_byte_size : 4
5423 <77> DW_AT_encoding : 5 (signed)
5425 imports the wrong die ( 0x75 instead of 0x58 ).
5426 This case will be ignored until the gcc bug is fixed. */
5430 /* Figure out the local name after import. */
5431 import_alias
= dwarf2_name (die
, cu
);
5433 /* Figure out where the statement is being imported to. */
5434 import_prefix
= determine_prefix (die
, cu
);
5436 /* Figure out what the scope of the imported die is and prepend it
5437 to the name of the imported die. */
5438 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5440 if (imported_die
->tag
!= DW_TAG_namespace
5441 && imported_die
->tag
!= DW_TAG_module
)
5443 imported_declaration
= imported_name
;
5444 canonical_name
= imported_name_prefix
;
5446 else if (strlen (imported_name_prefix
) > 0)
5448 temp
= alloca (strlen (imported_name_prefix
)
5449 + 2 + strlen (imported_name
) + 1);
5450 strcpy (temp
, imported_name_prefix
);
5451 strcat (temp
, "::");
5452 strcat (temp
, imported_name
);
5453 canonical_name
= temp
;
5456 canonical_name
= imported_name
;
5458 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
5460 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
5461 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
5462 child_die
= sibling_die (child_die
))
5464 /* DWARF-4: A Fortran use statement with a “rename list” may be
5465 represented by an imported module entry with an import attribute
5466 referring to the module and owned entries corresponding to those
5467 entities that are renamed as part of being imported. */
5469 if (child_die
->tag
!= DW_TAG_imported_declaration
)
5471 complaint (&symfile_complaints
,
5472 _("child DW_TAG_imported_declaration expected "
5473 "- DIE at 0x%x [in module %s]"),
5474 child_die
->offset
, objfile
->name
);
5478 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
5479 if (import_attr
== NULL
)
5481 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5482 dwarf_tag_name (child_die
->tag
));
5487 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
5489 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5490 if (imported_name
== NULL
)
5492 complaint (&symfile_complaints
,
5493 _("child DW_TAG_imported_declaration has unknown "
5494 "imported name - DIE at 0x%x [in module %s]"),
5495 child_die
->offset
, objfile
->name
);
5499 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
5501 process_die (child_die
, cu
);
5504 cp_add_using_directive (import_prefix
,
5507 imported_declaration
,
5509 &objfile
->objfile_obstack
);
5511 do_cleanups (cleanups
);
5514 /* Cleanup function for read_file_scope. */
5517 free_cu_line_header (void *arg
)
5519 struct dwarf2_cu
*cu
= arg
;
5521 free_line_header (cu
->line_header
);
5522 cu
->line_header
= NULL
;
5526 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5527 char **name
, char **comp_dir
)
5529 struct attribute
*attr
;
5534 /* Find the filename. Do not use dwarf2_name here, since the filename
5535 is not a source language identifier. */
5536 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5539 *name
= DW_STRING (attr
);
5542 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5544 *comp_dir
= DW_STRING (attr
);
5545 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5547 *comp_dir
= ldirname (*name
);
5548 if (*comp_dir
!= NULL
)
5549 make_cleanup (xfree
, *comp_dir
);
5551 if (*comp_dir
!= NULL
)
5553 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5554 directory, get rid of it. */
5555 char *cp
= strchr (*comp_dir
, ':');
5557 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5562 *name
= "<unknown>";
5565 /* Handle DW_AT_stmt_list for a compilation unit or type unit.
5566 DIE is the DW_TAG_compile_unit or DW_TAG_type_unit die for CU.
5567 COMP_DIR is the compilation directory.
5568 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
5571 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
5572 const char *comp_dir
, int want_line_info
)
5574 struct attribute
*attr
;
5575 struct objfile
*objfile
= cu
->objfile
;
5576 bfd
*abfd
= objfile
->obfd
;
5578 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5581 unsigned int line_offset
= DW_UNSND (attr
);
5582 struct line_header
*line_header
5583 = dwarf_decode_line_header (line_offset
, abfd
, cu
);
5587 cu
->line_header
= line_header
;
5588 make_cleanup (free_cu_line_header
, cu
);
5589 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, want_line_info
);
5594 /* Process DW_TAG_compile_unit. */
5597 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5599 struct objfile
*objfile
= cu
->objfile
;
5600 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5601 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5602 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5603 struct attribute
*attr
;
5605 char *comp_dir
= NULL
;
5606 struct die_info
*child_die
;
5607 bfd
*abfd
= objfile
->obfd
;
5610 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5612 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5614 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5615 from finish_block. */
5616 if (lowpc
== ((CORE_ADDR
) -1))
5621 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5623 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5626 set_cu_language (DW_UNSND (attr
), cu
);
5629 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5631 cu
->producer
= DW_STRING (attr
);
5633 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5634 standardised yet. As a workaround for the language detection we fall
5635 back to the DW_AT_producer string. */
5636 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5637 cu
->language
= language_opencl
;
5639 /* We assume that we're processing GCC output. */
5640 processing_gcc_compilation
= 2;
5642 processing_has_namespace_info
= 0;
5644 start_symtab (name
, comp_dir
, lowpc
);
5645 record_debugformat ("DWARF 2");
5646 record_producer (cu
->producer
);
5648 /* Decode line number information if present. We do this before
5649 processing child DIEs, so that the line header table is available
5650 for DW_AT_decl_file. */
5651 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 1);
5653 /* Process all dies in compilation unit. */
5654 if (die
->child
!= NULL
)
5656 child_die
= die
->child
;
5657 while (child_die
&& child_die
->tag
)
5659 process_die (child_die
, cu
);
5660 child_die
= sibling_die (child_die
);
5664 /* Decode macro information, if present. Dwarf 2 macro information
5665 refers to information in the line number info statement program
5666 header, so we can only read it if we've read the header
5668 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
5669 if (attr
&& cu
->line_header
)
5671 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
5672 complaint (&symfile_complaints
,
5673 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
5675 dwarf_decode_macros (cu
->line_header
, DW_UNSND (attr
),
5677 &dwarf2_per_objfile
->macro
, 1);
5681 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5682 if (attr
&& cu
->line_header
)
5684 unsigned int macro_offset
= DW_UNSND (attr
);
5686 dwarf_decode_macros (cu
->line_header
, macro_offset
,
5688 &dwarf2_per_objfile
->macinfo
, 0);
5692 do_cleanups (back_to
);
5695 /* Process DW_TAG_type_unit.
5696 For TUs we want to skip the first top level sibling if it's not the
5697 actual type being defined by this TU. In this case the first top
5698 level sibling is there to provide context only. */
5701 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5703 struct objfile
*objfile
= cu
->objfile
;
5704 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5706 struct attribute
*attr
;
5708 char *comp_dir
= NULL
;
5709 struct die_info
*child_die
;
5710 bfd
*abfd
= objfile
->obfd
;
5712 /* start_symtab needs a low pc, but we don't really have one.
5713 Do what read_file_scope would do in the absence of such info. */
5714 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5716 /* Find the filename. Do not use dwarf2_name here, since the filename
5717 is not a source language identifier. */
5718 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5720 name
= DW_STRING (attr
);
5722 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5724 comp_dir
= DW_STRING (attr
);
5725 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5727 comp_dir
= ldirname (name
);
5728 if (comp_dir
!= NULL
)
5729 make_cleanup (xfree
, comp_dir
);
5735 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5737 set_cu_language (DW_UNSND (attr
), cu
);
5739 /* This isn't technically needed today. It is done for symmetry
5740 with read_file_scope. */
5741 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5743 cu
->producer
= DW_STRING (attr
);
5745 /* We assume that we're processing GCC output. */
5746 processing_gcc_compilation
= 2;
5748 processing_has_namespace_info
= 0;
5750 start_symtab (name
, comp_dir
, lowpc
);
5751 record_debugformat ("DWARF 2");
5752 record_producer (cu
->producer
);
5754 /* Decode line number information if present. We do this before
5755 processing child DIEs, so that the line header table is available
5756 for DW_AT_decl_file.
5757 We don't need the pc/line-number mapping for type units. */
5758 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 0);
5760 /* Process the dies in the type unit. */
5761 if (die
->child
== NULL
)
5763 dump_die_for_error (die
);
5764 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5765 bfd_get_filename (abfd
));
5768 child_die
= die
->child
;
5770 while (child_die
&& child_die
->tag
)
5772 process_die (child_die
, cu
);
5774 child_die
= sibling_die (child_die
);
5777 do_cleanups (back_to
);
5780 /* qsort helper for inherit_abstract_dies. */
5783 unsigned_int_compar (const void *ap
, const void *bp
)
5785 unsigned int a
= *(unsigned int *) ap
;
5786 unsigned int b
= *(unsigned int *) bp
;
5788 return (a
> b
) - (b
> a
);
5791 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5792 Inherit only the children of the DW_AT_abstract_origin DIE not being
5793 already referenced by DW_AT_abstract_origin from the children of the
5797 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5799 struct die_info
*child_die
;
5800 unsigned die_children_count
;
5801 /* CU offsets which were referenced by children of the current DIE. */
5803 unsigned *offsets_end
, *offsetp
;
5804 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5805 struct die_info
*origin_die
;
5806 /* Iterator of the ORIGIN_DIE children. */
5807 struct die_info
*origin_child_die
;
5808 struct cleanup
*cleanups
;
5809 struct attribute
*attr
;
5810 struct dwarf2_cu
*origin_cu
;
5811 struct pending
**origin_previous_list_in_scope
;
5813 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5817 /* Note that following die references may follow to a die in a
5821 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5823 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5825 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5826 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5828 if (die
->tag
!= origin_die
->tag
5829 && !(die
->tag
== DW_TAG_inlined_subroutine
5830 && origin_die
->tag
== DW_TAG_subprogram
))
5831 complaint (&symfile_complaints
,
5832 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5833 die
->offset
, origin_die
->offset
);
5835 child_die
= die
->child
;
5836 die_children_count
= 0;
5837 while (child_die
&& child_die
->tag
)
5839 child_die
= sibling_die (child_die
);
5840 die_children_count
++;
5842 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5843 cleanups
= make_cleanup (xfree
, offsets
);
5845 offsets_end
= offsets
;
5846 child_die
= die
->child
;
5847 while (child_die
&& child_die
->tag
)
5849 /* For each CHILD_DIE, find the corresponding child of
5850 ORIGIN_DIE. If there is more than one layer of
5851 DW_AT_abstract_origin, follow them all; there shouldn't be,
5852 but GCC versions at least through 4.4 generate this (GCC PR
5854 struct die_info
*child_origin_die
= child_die
;
5855 struct dwarf2_cu
*child_origin_cu
= cu
;
5859 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5863 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5867 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5868 counterpart may exist. */
5869 if (child_origin_die
!= child_die
)
5871 if (child_die
->tag
!= child_origin_die
->tag
5872 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5873 && child_origin_die
->tag
== DW_TAG_subprogram
))
5874 complaint (&symfile_complaints
,
5875 _("Child DIE 0x%x and its abstract origin 0x%x have "
5876 "different tags"), child_die
->offset
,
5877 child_origin_die
->offset
);
5878 if (child_origin_die
->parent
!= origin_die
)
5879 complaint (&symfile_complaints
,
5880 _("Child DIE 0x%x and its abstract origin 0x%x have "
5881 "different parents"), child_die
->offset
,
5882 child_origin_die
->offset
);
5884 *offsets_end
++ = child_origin_die
->offset
;
5886 child_die
= sibling_die (child_die
);
5888 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5889 unsigned_int_compar
);
5890 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5891 if (offsetp
[-1] == *offsetp
)
5892 complaint (&symfile_complaints
,
5893 _("Multiple children of DIE 0x%x refer "
5894 "to DIE 0x%x as their abstract origin"),
5895 die
->offset
, *offsetp
);
5898 origin_child_die
= origin_die
->child
;
5899 while (origin_child_die
&& origin_child_die
->tag
)
5901 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5902 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5904 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5906 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5907 process_die (origin_child_die
, origin_cu
);
5909 origin_child_die
= sibling_die (origin_child_die
);
5911 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5913 do_cleanups (cleanups
);
5917 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5919 struct objfile
*objfile
= cu
->objfile
;
5920 struct context_stack
*new;
5923 struct die_info
*child_die
;
5924 struct attribute
*attr
, *call_line
, *call_file
;
5927 struct block
*block
;
5928 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5929 VEC (symbolp
) *template_args
= NULL
;
5930 struct template_symbol
*templ_func
= NULL
;
5934 /* If we do not have call site information, we can't show the
5935 caller of this inlined function. That's too confusing, so
5936 only use the scope for local variables. */
5937 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5938 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5939 if (call_line
== NULL
|| call_file
== NULL
)
5941 read_lexical_block_scope (die
, cu
);
5946 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5948 name
= dwarf2_name (die
, cu
);
5950 /* Ignore functions with missing or empty names. These are actually
5951 illegal according to the DWARF standard. */
5954 complaint (&symfile_complaints
,
5955 _("missing name for subprogram DIE at %d"), die
->offset
);
5959 /* Ignore functions with missing or invalid low and high pc attributes. */
5960 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5962 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5963 if (!attr
|| !DW_UNSND (attr
))
5964 complaint (&symfile_complaints
,
5965 _("cannot get low and high bounds "
5966 "for subprogram DIE at %d"),
5974 /* If we have any template arguments, then we must allocate a
5975 different sort of symbol. */
5976 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5978 if (child_die
->tag
== DW_TAG_template_type_param
5979 || child_die
->tag
== DW_TAG_template_value_param
)
5981 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5982 struct template_symbol
);
5983 templ_func
->base
.is_cplus_template_function
= 1;
5988 new = push_context (0, lowpc
);
5989 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5990 (struct symbol
*) templ_func
);
5992 /* If there is a location expression for DW_AT_frame_base, record
5994 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5996 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5997 expression is being recorded directly in the function's symbol
5998 and not in a separate frame-base object. I guess this hack is
5999 to avoid adding some sort of frame-base adjunct/annex to the
6000 function's symbol :-(. The problem with doing this is that it
6001 results in a function symbol with a location expression that
6002 has nothing to do with the location of the function, ouch! The
6003 relationship should be: a function's symbol has-a frame base; a
6004 frame-base has-a location expression. */
6005 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
6007 cu
->list_in_scope
= &local_symbols
;
6009 if (die
->child
!= NULL
)
6011 child_die
= die
->child
;
6012 while (child_die
&& child_die
->tag
)
6014 if (child_die
->tag
== DW_TAG_template_type_param
6015 || child_die
->tag
== DW_TAG_template_value_param
)
6017 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6020 VEC_safe_push (symbolp
, template_args
, arg
);
6023 process_die (child_die
, cu
);
6024 child_die
= sibling_die (child_die
);
6028 inherit_abstract_dies (die
, cu
);
6030 /* If we have a DW_AT_specification, we might need to import using
6031 directives from the context of the specification DIE. See the
6032 comment in determine_prefix. */
6033 if (cu
->language
== language_cplus
6034 && dwarf2_attr (die
, DW_AT_specification
, cu
))
6036 struct dwarf2_cu
*spec_cu
= cu
;
6037 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
6041 child_die
= spec_die
->child
;
6042 while (child_die
&& child_die
->tag
)
6044 if (child_die
->tag
== DW_TAG_imported_module
)
6045 process_die (child_die
, spec_cu
);
6046 child_die
= sibling_die (child_die
);
6049 /* In some cases, GCC generates specification DIEs that
6050 themselves contain DW_AT_specification attributes. */
6051 spec_die
= die_specification (spec_die
, &spec_cu
);
6055 new = pop_context ();
6056 /* Make a block for the local symbols within. */
6057 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
6058 lowpc
, highpc
, objfile
);
6060 /* For C++, set the block's scope. */
6061 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
6062 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
6063 determine_prefix (die
, cu
),
6064 processing_has_namespace_info
);
6066 /* If we have address ranges, record them. */
6067 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
6069 /* Attach template arguments to function. */
6070 if (! VEC_empty (symbolp
, template_args
))
6072 gdb_assert (templ_func
!= NULL
);
6074 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
6075 templ_func
->template_arguments
6076 = obstack_alloc (&objfile
->objfile_obstack
,
6077 (templ_func
->n_template_arguments
6078 * sizeof (struct symbol
*)));
6079 memcpy (templ_func
->template_arguments
,
6080 VEC_address (symbolp
, template_args
),
6081 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
6082 VEC_free (symbolp
, template_args
);
6085 /* In C++, we can have functions nested inside functions (e.g., when
6086 a function declares a class that has methods). This means that
6087 when we finish processing a function scope, we may need to go
6088 back to building a containing block's symbol lists. */
6089 local_symbols
= new->locals
;
6090 param_symbols
= new->params
;
6091 using_directives
= new->using_directives
;
6093 /* If we've finished processing a top-level function, subsequent
6094 symbols go in the file symbol list. */
6095 if (outermost_context_p ())
6096 cu
->list_in_scope
= &file_symbols
;
6099 /* Process all the DIES contained within a lexical block scope. Start
6100 a new scope, process the dies, and then close the scope. */
6103 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6105 struct objfile
*objfile
= cu
->objfile
;
6106 struct context_stack
*new;
6107 CORE_ADDR lowpc
, highpc
;
6108 struct die_info
*child_die
;
6111 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6113 /* Ignore blocks with missing or invalid low and high pc attributes. */
6114 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
6115 as multiple lexical blocks? Handling children in a sane way would
6116 be nasty. Might be easier to properly extend generic blocks to
6118 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
6123 push_context (0, lowpc
);
6124 if (die
->child
!= NULL
)
6126 child_die
= die
->child
;
6127 while (child_die
&& child_die
->tag
)
6129 process_die (child_die
, cu
);
6130 child_die
= sibling_die (child_die
);
6133 new = pop_context ();
6135 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
6138 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
6141 /* Note that recording ranges after traversing children, as we
6142 do here, means that recording a parent's ranges entails
6143 walking across all its children's ranges as they appear in
6144 the address map, which is quadratic behavior.
6146 It would be nicer to record the parent's ranges before
6147 traversing its children, simply overriding whatever you find
6148 there. But since we don't even decide whether to create a
6149 block until after we've traversed its children, that's hard
6151 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
6153 local_symbols
= new->locals
;
6154 using_directives
= new->using_directives
;
6157 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
6160 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6162 struct objfile
*objfile
= cu
->objfile
;
6163 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6164 CORE_ADDR pc
, baseaddr
;
6165 struct attribute
*attr
;
6166 struct call_site
*call_site
, call_site_local
;
6169 struct die_info
*child_die
;
6171 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6173 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6176 complaint (&symfile_complaints
,
6177 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
6178 "DIE 0x%x [in module %s]"),
6179 die
->offset
, objfile
->name
);
6182 pc
= DW_ADDR (attr
) + baseaddr
;
6184 if (cu
->call_site_htab
== NULL
)
6185 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
6186 NULL
, &objfile
->objfile_obstack
,
6187 hashtab_obstack_allocate
, NULL
);
6188 call_site_local
.pc
= pc
;
6189 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
6192 complaint (&symfile_complaints
,
6193 _("Duplicate PC %s for DW_TAG_GNU_call_site "
6194 "DIE 0x%x [in module %s]"),
6195 paddress (gdbarch
, pc
), die
->offset
, objfile
->name
);
6199 /* Count parameters at the caller. */
6202 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
6203 child_die
= sibling_die (child_die
))
6205 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
6207 complaint (&symfile_complaints
,
6208 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
6209 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6210 child_die
->tag
, child_die
->offset
, objfile
->name
);
6217 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
6218 (sizeof (*call_site
)
6219 + (sizeof (*call_site
->parameter
)
6222 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
6225 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
6227 struct die_info
*func_die
;
6229 /* Skip also over DW_TAG_inlined_subroutine. */
6230 for (func_die
= die
->parent
;
6231 func_die
&& func_die
->tag
!= DW_TAG_subprogram
6232 && func_die
->tag
!= DW_TAG_subroutine_type
;
6233 func_die
= func_die
->parent
);
6235 /* DW_AT_GNU_all_call_sites is a superset
6236 of DW_AT_GNU_all_tail_call_sites. */
6238 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
6239 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
6241 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
6242 not complete. But keep CALL_SITE for look ups via call_site_htab,
6243 both the initial caller containing the real return address PC and
6244 the final callee containing the current PC of a chain of tail
6245 calls do not need to have the tail call list complete. But any
6246 function candidate for a virtual tail call frame searched via
6247 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
6248 determined unambiguously. */
6252 struct type
*func_type
= NULL
;
6255 func_type
= get_die_type (func_die
, cu
);
6256 if (func_type
!= NULL
)
6258 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
6260 /* Enlist this call site to the function. */
6261 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
6262 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
6265 complaint (&symfile_complaints
,
6266 _("Cannot find function owning DW_TAG_GNU_call_site "
6267 "DIE 0x%x [in module %s]"),
6268 die
->offset
, objfile
->name
);
6272 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
6274 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
6275 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
6276 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
6277 /* Keep NULL DWARF_BLOCK. */;
6278 else if (attr_form_is_block (attr
))
6280 struct dwarf2_locexpr_baton
*dlbaton
;
6282 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
6283 dlbaton
->data
= DW_BLOCK (attr
)->data
;
6284 dlbaton
->size
= DW_BLOCK (attr
)->size
;
6285 dlbaton
->per_cu
= cu
->per_cu
;
6287 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
6289 else if (is_ref_attr (attr
))
6291 struct dwarf2_cu
*target_cu
= cu
;
6292 struct die_info
*target_die
;
6294 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
6295 gdb_assert (target_cu
->objfile
== objfile
);
6296 if (die_is_declaration (target_die
, target_cu
))
6298 const char *target_physname
;
6300 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
6301 if (target_physname
== NULL
)
6302 complaint (&symfile_complaints
,
6303 _("DW_AT_GNU_call_site_target target DIE has invalid "
6304 "physname, for referencing DIE 0x%x [in module %s]"),
6305 die
->offset
, objfile
->name
);
6307 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
6313 /* DW_AT_entry_pc should be preferred. */
6314 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
6315 complaint (&symfile_complaints
,
6316 _("DW_AT_GNU_call_site_target target DIE has invalid "
6317 "low pc, for referencing DIE 0x%x [in module %s]"),
6318 die
->offset
, objfile
->name
);
6320 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
6324 complaint (&symfile_complaints
,
6325 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
6326 "block nor reference, for DIE 0x%x [in module %s]"),
6327 die
->offset
, objfile
->name
);
6329 call_site
->per_cu
= cu
->per_cu
;
6331 for (child_die
= die
->child
;
6332 child_die
&& child_die
->tag
;
6333 child_die
= sibling_die (child_die
))
6335 struct dwarf2_locexpr_baton
*dlbaton
;
6336 struct call_site_parameter
*parameter
;
6338 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
6340 /* Already printed the complaint above. */
6344 gdb_assert (call_site
->parameter_count
< nparams
);
6345 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
6347 /* DW_AT_location specifies the register number. Value of the data
6348 assumed for the register is contained in DW_AT_GNU_call_site_value. */
6350 attr
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
6351 if (!attr
|| !attr_form_is_block (attr
))
6353 complaint (&symfile_complaints
,
6354 _("No DW_FORM_block* DW_AT_location for "
6355 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6356 child_die
->offset
, objfile
->name
);
6359 parameter
->dwarf_reg
= dwarf_block_to_dwarf_reg (DW_BLOCK (attr
)->data
,
6360 &DW_BLOCK (attr
)->data
[DW_BLOCK (attr
)->size
]);
6361 if (parameter
->dwarf_reg
== -1
6362 && !dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (attr
)->data
,
6363 &DW_BLOCK (attr
)->data
[DW_BLOCK (attr
)->size
],
6364 ¶meter
->fb_offset
))
6366 complaint (&symfile_complaints
,
6367 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
6368 "for DW_FORM_block* DW_AT_location for "
6369 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6370 child_die
->offset
, objfile
->name
);
6374 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
6375 if (!attr_form_is_block (attr
))
6377 complaint (&symfile_complaints
,
6378 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
6379 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6380 child_die
->offset
, objfile
->name
);
6383 parameter
->value
= DW_BLOCK (attr
)->data
;
6384 parameter
->value_size
= DW_BLOCK (attr
)->size
;
6386 /* Parameters are not pre-cleared by memset above. */
6387 parameter
->data_value
= NULL
;
6388 parameter
->data_value_size
= 0;
6389 call_site
->parameter_count
++;
6391 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
6394 if (!attr_form_is_block (attr
))
6395 complaint (&symfile_complaints
,
6396 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
6397 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6398 child_die
->offset
, objfile
->name
);
6401 parameter
->data_value
= DW_BLOCK (attr
)->data
;
6402 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
6408 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
6409 Return 1 if the attributes are present and valid, otherwise, return 0.
6410 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
6413 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
6414 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
6415 struct partial_symtab
*ranges_pst
)
6417 struct objfile
*objfile
= cu
->objfile
;
6418 struct comp_unit_head
*cu_header
= &cu
->header
;
6419 bfd
*obfd
= objfile
->obfd
;
6420 unsigned int addr_size
= cu_header
->addr_size
;
6421 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6422 /* Base address selection entry. */
6433 found_base
= cu
->base_known
;
6434 base
= cu
->base_address
;
6436 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
6437 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6439 complaint (&symfile_complaints
,
6440 _("Offset %d out of bounds for DW_AT_ranges attribute"),
6444 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6446 /* Read in the largest possible address. */
6447 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
6448 if ((marker
& mask
) == mask
)
6450 /* If we found the largest possible address, then
6451 read the base address. */
6452 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
6453 buffer
+= 2 * addr_size
;
6454 offset
+= 2 * addr_size
;
6460 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6464 CORE_ADDR range_beginning
, range_end
;
6466 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
6467 buffer
+= addr_size
;
6468 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
6469 buffer
+= addr_size
;
6470 offset
+= 2 * addr_size
;
6472 /* An end of list marker is a pair of zero addresses. */
6473 if (range_beginning
== 0 && range_end
== 0)
6474 /* Found the end of list entry. */
6477 /* Each base address selection entry is a pair of 2 values.
6478 The first is the largest possible address, the second is
6479 the base address. Check for a base address here. */
6480 if ((range_beginning
& mask
) == mask
)
6482 /* If we found the largest possible address, then
6483 read the base address. */
6484 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
6491 /* We have no valid base address for the ranges
6493 complaint (&symfile_complaints
,
6494 _("Invalid .debug_ranges data (no base address)"));
6498 if (range_beginning
> range_end
)
6500 /* Inverted range entries are invalid. */
6501 complaint (&symfile_complaints
,
6502 _("Invalid .debug_ranges data (inverted range)"));
6506 /* Empty range entries have no effect. */
6507 if (range_beginning
== range_end
)
6510 range_beginning
+= base
;
6513 if (ranges_pst
!= NULL
)
6514 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6515 range_beginning
+ baseaddr
,
6516 range_end
- 1 + baseaddr
,
6519 /* FIXME: This is recording everything as a low-high
6520 segment of consecutive addresses. We should have a
6521 data structure for discontiguous block ranges
6525 low
= range_beginning
;
6531 if (range_beginning
< low
)
6532 low
= range_beginning
;
6533 if (range_end
> high
)
6539 /* If the first entry is an end-of-list marker, the range
6540 describes an empty scope, i.e. no instructions. */
6546 *high_return
= high
;
6550 /* Get low and high pc attributes from a die. Return 1 if the attributes
6551 are present and valid, otherwise, return 0. Return -1 if the range is
6552 discontinuous, i.e. derived from DW_AT_ranges information. */
6554 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
6555 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
6556 struct partial_symtab
*pst
)
6558 struct attribute
*attr
;
6563 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6566 high
= DW_ADDR (attr
);
6567 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6569 low
= DW_ADDR (attr
);
6571 /* Found high w/o low attribute. */
6574 /* Found consecutive range of addresses. */
6579 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6582 /* Value of the DW_AT_ranges attribute is the offset in the
6583 .debug_ranges section. */
6584 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
6586 /* Found discontinuous range of addresses. */
6591 /* read_partial_die has also the strict LOW < HIGH requirement. */
6595 /* When using the GNU linker, .gnu.linkonce. sections are used to
6596 eliminate duplicate copies of functions and vtables and such.
6597 The linker will arbitrarily choose one and discard the others.
6598 The AT_*_pc values for such functions refer to local labels in
6599 these sections. If the section from that file was discarded, the
6600 labels are not in the output, so the relocs get a value of 0.
6601 If this is a discarded function, mark the pc bounds as invalid,
6602 so that GDB will ignore it. */
6603 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
6612 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
6613 its low and high PC addresses. Do nothing if these addresses could not
6614 be determined. Otherwise, set LOWPC to the low address if it is smaller,
6615 and HIGHPC to the high address if greater than HIGHPC. */
6618 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
6619 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6620 struct dwarf2_cu
*cu
)
6622 CORE_ADDR low
, high
;
6623 struct die_info
*child
= die
->child
;
6625 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
6627 *lowpc
= min (*lowpc
, low
);
6628 *highpc
= max (*highpc
, high
);
6631 /* If the language does not allow nested subprograms (either inside
6632 subprograms or lexical blocks), we're done. */
6633 if (cu
->language
!= language_ada
)
6636 /* Check all the children of the given DIE. If it contains nested
6637 subprograms, then check their pc bounds. Likewise, we need to
6638 check lexical blocks as well, as they may also contain subprogram
6640 while (child
&& child
->tag
)
6642 if (child
->tag
== DW_TAG_subprogram
6643 || child
->tag
== DW_TAG_lexical_block
)
6644 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
6645 child
= sibling_die (child
);
6649 /* Get the low and high pc's represented by the scope DIE, and store
6650 them in *LOWPC and *HIGHPC. If the correct values can't be
6651 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6654 get_scope_pc_bounds (struct die_info
*die
,
6655 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6656 struct dwarf2_cu
*cu
)
6658 CORE_ADDR best_low
= (CORE_ADDR
) -1;
6659 CORE_ADDR best_high
= (CORE_ADDR
) 0;
6660 CORE_ADDR current_low
, current_high
;
6662 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
6664 best_low
= current_low
;
6665 best_high
= current_high
;
6669 struct die_info
*child
= die
->child
;
6671 while (child
&& child
->tag
)
6673 switch (child
->tag
) {
6674 case DW_TAG_subprogram
:
6675 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
6677 case DW_TAG_namespace
:
6679 /* FIXME: carlton/2004-01-16: Should we do this for
6680 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6681 that current GCC's always emit the DIEs corresponding
6682 to definitions of methods of classes as children of a
6683 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6684 the DIEs giving the declarations, which could be
6685 anywhere). But I don't see any reason why the
6686 standards says that they have to be there. */
6687 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
6689 if (current_low
!= ((CORE_ADDR
) -1))
6691 best_low
= min (best_low
, current_low
);
6692 best_high
= max (best_high
, current_high
);
6700 child
= sibling_die (child
);
6705 *highpc
= best_high
;
6708 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6711 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
6712 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
6714 struct objfile
*objfile
= cu
->objfile
;
6715 struct attribute
*attr
;
6717 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6720 CORE_ADDR high
= DW_ADDR (attr
);
6722 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6725 CORE_ADDR low
= DW_ADDR (attr
);
6727 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
6731 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6734 bfd
*obfd
= objfile
->obfd
;
6736 /* The value of the DW_AT_ranges attribute is the offset of the
6737 address range list in the .debug_ranges section. */
6738 unsigned long offset
= DW_UNSND (attr
);
6739 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6741 /* For some target architectures, but not others, the
6742 read_address function sign-extends the addresses it returns.
6743 To recognize base address selection entries, we need a
6745 unsigned int addr_size
= cu
->header
.addr_size
;
6746 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6748 /* The base address, to which the next pair is relative. Note
6749 that this 'base' is a DWARF concept: most entries in a range
6750 list are relative, to reduce the number of relocs against the
6751 debugging information. This is separate from this function's
6752 'baseaddr' argument, which GDB uses to relocate debugging
6753 information from a shared library based on the address at
6754 which the library was loaded. */
6755 CORE_ADDR base
= cu
->base_address
;
6756 int base_known
= cu
->base_known
;
6758 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
6759 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6761 complaint (&symfile_complaints
,
6762 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6769 unsigned int bytes_read
;
6770 CORE_ADDR start
, end
;
6772 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6773 buffer
+= bytes_read
;
6774 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6775 buffer
+= bytes_read
;
6777 /* Did we find the end of the range list? */
6778 if (start
== 0 && end
== 0)
6781 /* Did we find a base address selection entry? */
6782 else if ((start
& base_select_mask
) == base_select_mask
)
6788 /* We found an ordinary address range. */
6793 complaint (&symfile_complaints
,
6794 _("Invalid .debug_ranges data "
6795 "(no base address)"));
6801 /* Inverted range entries are invalid. */
6802 complaint (&symfile_complaints
,
6803 _("Invalid .debug_ranges data "
6804 "(inverted range)"));
6808 /* Empty range entries have no effect. */
6812 record_block_range (block
,
6813 baseaddr
+ base
+ start
,
6814 baseaddr
+ base
+ end
- 1);
6820 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
6821 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
6822 during 4.6.0 experimental. */
6825 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
6828 int major
, minor
, release
;
6830 if (cu
->producer
== NULL
)
6832 /* For unknown compilers expect their behavior is DWARF version
6835 GCC started to support .debug_types sections by -gdwarf-4 since
6836 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
6837 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
6838 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
6839 interpreted incorrectly by GDB now - GCC PR debug/48229. */
6844 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
6846 if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) != 0)
6848 /* For non-GCC compilers expect their behavior is DWARF version
6853 cs
= &cu
->producer
[strlen ("GNU ")];
6854 while (*cs
&& !isdigit (*cs
))
6856 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
6858 /* Not recognized as GCC. */
6863 return major
< 4 || (major
== 4 && minor
< 6);
6866 /* Return the default accessibility type if it is not overriden by
6867 DW_AT_accessibility. */
6869 static enum dwarf_access_attribute
6870 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
6872 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
6874 /* The default DWARF 2 accessibility for members is public, the default
6875 accessibility for inheritance is private. */
6877 if (die
->tag
!= DW_TAG_inheritance
)
6878 return DW_ACCESS_public
;
6880 return DW_ACCESS_private
;
6884 /* DWARF 3+ defines the default accessibility a different way. The same
6885 rules apply now for DW_TAG_inheritance as for the members and it only
6886 depends on the container kind. */
6888 if (die
->parent
->tag
== DW_TAG_class_type
)
6889 return DW_ACCESS_private
;
6891 return DW_ACCESS_public
;
6895 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
6896 offset. If the attribute was not found return 0, otherwise return
6897 1. If it was found but could not properly be handled, set *OFFSET
6901 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
6904 struct attribute
*attr
;
6906 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6911 /* Note that we do not check for a section offset first here.
6912 This is because DW_AT_data_member_location is new in DWARF 4,
6913 so if we see it, we can assume that a constant form is really
6914 a constant and not a section offset. */
6915 if (attr_form_is_constant (attr
))
6916 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
6917 else if (attr_form_is_section_offset (attr
))
6918 dwarf2_complex_location_expr_complaint ();
6919 else if (attr_form_is_block (attr
))
6920 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6922 dwarf2_complex_location_expr_complaint ();
6930 /* Add an aggregate field to the field list. */
6933 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6934 struct dwarf2_cu
*cu
)
6936 struct objfile
*objfile
= cu
->objfile
;
6937 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6938 struct nextfield
*new_field
;
6939 struct attribute
*attr
;
6941 char *fieldname
= "";
6943 /* Allocate a new field list entry and link it in. */
6944 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6945 make_cleanup (xfree
, new_field
);
6946 memset (new_field
, 0, sizeof (struct nextfield
));
6948 if (die
->tag
== DW_TAG_inheritance
)
6950 new_field
->next
= fip
->baseclasses
;
6951 fip
->baseclasses
= new_field
;
6955 new_field
->next
= fip
->fields
;
6956 fip
->fields
= new_field
;
6960 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6962 new_field
->accessibility
= DW_UNSND (attr
);
6964 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
6965 if (new_field
->accessibility
!= DW_ACCESS_public
)
6966 fip
->non_public_fields
= 1;
6968 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6970 new_field
->virtuality
= DW_UNSND (attr
);
6972 new_field
->virtuality
= DW_VIRTUALITY_none
;
6974 fp
= &new_field
->field
;
6976 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6980 /* Data member other than a C++ static data member. */
6982 /* Get type of field. */
6983 fp
->type
= die_type (die
, cu
);
6985 SET_FIELD_BITPOS (*fp
, 0);
6987 /* Get bit size of field (zero if none). */
6988 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6991 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6995 FIELD_BITSIZE (*fp
) = 0;
6998 /* Get bit offset of field. */
6999 if (handle_data_member_location (die
, cu
, &offset
))
7000 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
7001 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
7004 if (gdbarch_bits_big_endian (gdbarch
))
7006 /* For big endian bits, the DW_AT_bit_offset gives the
7007 additional bit offset from the MSB of the containing
7008 anonymous object to the MSB of the field. We don't
7009 have to do anything special since we don't need to
7010 know the size of the anonymous object. */
7011 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
7015 /* For little endian bits, compute the bit offset to the
7016 MSB of the anonymous object, subtract off the number of
7017 bits from the MSB of the field to the MSB of the
7018 object, and then subtract off the number of bits of
7019 the field itself. The result is the bit offset of
7020 the LSB of the field. */
7022 int bit_offset
= DW_UNSND (attr
);
7024 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7027 /* The size of the anonymous object containing
7028 the bit field is explicit, so use the
7029 indicated size (in bytes). */
7030 anonymous_size
= DW_UNSND (attr
);
7034 /* The size of the anonymous object containing
7035 the bit field must be inferred from the type
7036 attribute of the data member containing the
7038 anonymous_size
= TYPE_LENGTH (fp
->type
);
7040 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
7041 - bit_offset
- FIELD_BITSIZE (*fp
);
7045 /* Get name of field. */
7046 fieldname
= dwarf2_name (die
, cu
);
7047 if (fieldname
== NULL
)
7050 /* The name is already allocated along with this objfile, so we don't
7051 need to duplicate it for the type. */
7052 fp
->name
= fieldname
;
7054 /* Change accessibility for artificial fields (e.g. virtual table
7055 pointer or virtual base class pointer) to private. */
7056 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
7058 FIELD_ARTIFICIAL (*fp
) = 1;
7059 new_field
->accessibility
= DW_ACCESS_private
;
7060 fip
->non_public_fields
= 1;
7063 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
7065 /* C++ static member. */
7067 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
7068 is a declaration, but all versions of G++ as of this writing
7069 (so through at least 3.2.1) incorrectly generate
7070 DW_TAG_variable tags. */
7072 const char *physname
;
7074 /* Get name of field. */
7075 fieldname
= dwarf2_name (die
, cu
);
7076 if (fieldname
== NULL
)
7079 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7081 /* Only create a symbol if this is an external value.
7082 new_symbol checks this and puts the value in the global symbol
7083 table, which we want. If it is not external, new_symbol
7084 will try to put the value in cu->list_in_scope which is wrong. */
7085 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
7087 /* A static const member, not much different than an enum as far as
7088 we're concerned, except that we can support more types. */
7089 new_symbol (die
, NULL
, cu
);
7092 /* Get physical name. */
7093 physname
= dwarf2_physname (fieldname
, die
, cu
);
7095 /* The name is already allocated along with this objfile, so we don't
7096 need to duplicate it for the type. */
7097 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
7098 FIELD_TYPE (*fp
) = die_type (die
, cu
);
7099 FIELD_NAME (*fp
) = fieldname
;
7101 else if (die
->tag
== DW_TAG_inheritance
)
7105 /* C++ base class field. */
7106 if (handle_data_member_location (die
, cu
, &offset
))
7107 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
7108 FIELD_BITSIZE (*fp
) = 0;
7109 FIELD_TYPE (*fp
) = die_type (die
, cu
);
7110 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
7111 fip
->nbaseclasses
++;
7115 /* Add a typedef defined in the scope of the FIP's class. */
7118 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
7119 struct dwarf2_cu
*cu
)
7121 struct objfile
*objfile
= cu
->objfile
;
7122 struct typedef_field_list
*new_field
;
7123 struct attribute
*attr
;
7124 struct typedef_field
*fp
;
7125 char *fieldname
= "";
7127 /* Allocate a new field list entry and link it in. */
7128 new_field
= xzalloc (sizeof (*new_field
));
7129 make_cleanup (xfree
, new_field
);
7131 gdb_assert (die
->tag
== DW_TAG_typedef
);
7133 fp
= &new_field
->field
;
7135 /* Get name of field. */
7136 fp
->name
= dwarf2_name (die
, cu
);
7137 if (fp
->name
== NULL
)
7140 fp
->type
= read_type_die (die
, cu
);
7142 new_field
->next
= fip
->typedef_field_list
;
7143 fip
->typedef_field_list
= new_field
;
7144 fip
->typedef_field_list_count
++;
7147 /* Create the vector of fields, and attach it to the type. */
7150 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
7151 struct dwarf2_cu
*cu
)
7153 int nfields
= fip
->nfields
;
7155 /* Record the field count, allocate space for the array of fields,
7156 and create blank accessibility bitfields if necessary. */
7157 TYPE_NFIELDS (type
) = nfields
;
7158 TYPE_FIELDS (type
) = (struct field
*)
7159 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
7160 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
7162 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
7164 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7166 TYPE_FIELD_PRIVATE_BITS (type
) =
7167 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7168 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
7170 TYPE_FIELD_PROTECTED_BITS (type
) =
7171 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7172 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
7174 TYPE_FIELD_IGNORE_BITS (type
) =
7175 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7176 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
7179 /* If the type has baseclasses, allocate and clear a bit vector for
7180 TYPE_FIELD_VIRTUAL_BITS. */
7181 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
7183 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
7184 unsigned char *pointer
;
7186 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7187 pointer
= TYPE_ALLOC (type
, num_bytes
);
7188 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
7189 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
7190 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
7193 /* Copy the saved-up fields into the field vector. Start from the head of
7194 the list, adding to the tail of the field array, so that they end up in
7195 the same order in the array in which they were added to the list. */
7196 while (nfields
-- > 0)
7198 struct nextfield
*fieldp
;
7202 fieldp
= fip
->fields
;
7203 fip
->fields
= fieldp
->next
;
7207 fieldp
= fip
->baseclasses
;
7208 fip
->baseclasses
= fieldp
->next
;
7211 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
7212 switch (fieldp
->accessibility
)
7214 case DW_ACCESS_private
:
7215 if (cu
->language
!= language_ada
)
7216 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
7219 case DW_ACCESS_protected
:
7220 if (cu
->language
!= language_ada
)
7221 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
7224 case DW_ACCESS_public
:
7228 /* Unknown accessibility. Complain and treat it as public. */
7230 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
7231 fieldp
->accessibility
);
7235 if (nfields
< fip
->nbaseclasses
)
7237 switch (fieldp
->virtuality
)
7239 case DW_VIRTUALITY_virtual
:
7240 case DW_VIRTUALITY_pure_virtual
:
7241 if (cu
->language
== language_ada
)
7242 error (_("unexpected virtuality in component of Ada type"));
7243 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
7250 /* Add a member function to the proper fieldlist. */
7253 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
7254 struct type
*type
, struct dwarf2_cu
*cu
)
7256 struct objfile
*objfile
= cu
->objfile
;
7257 struct attribute
*attr
;
7258 struct fnfieldlist
*flp
;
7260 struct fn_field
*fnp
;
7262 struct nextfnfield
*new_fnfield
;
7263 struct type
*this_type
;
7264 enum dwarf_access_attribute accessibility
;
7266 if (cu
->language
== language_ada
)
7267 error (_("unexpected member function in Ada type"));
7269 /* Get name of member function. */
7270 fieldname
= dwarf2_name (die
, cu
);
7271 if (fieldname
== NULL
)
7274 /* Look up member function name in fieldlist. */
7275 for (i
= 0; i
< fip
->nfnfields
; i
++)
7277 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
7281 /* Create new list element if necessary. */
7282 if (i
< fip
->nfnfields
)
7283 flp
= &fip
->fnfieldlists
[i
];
7286 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7288 fip
->fnfieldlists
= (struct fnfieldlist
*)
7289 xrealloc (fip
->fnfieldlists
,
7290 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
7291 * sizeof (struct fnfieldlist
));
7292 if (fip
->nfnfields
== 0)
7293 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
7295 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
7296 flp
->name
= fieldname
;
7299 i
= fip
->nfnfields
++;
7302 /* Create a new member function field and chain it to the field list
7304 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
7305 make_cleanup (xfree
, new_fnfield
);
7306 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
7307 new_fnfield
->next
= flp
->head
;
7308 flp
->head
= new_fnfield
;
7311 /* Fill in the member function field info. */
7312 fnp
= &new_fnfield
->fnfield
;
7314 /* Delay processing of the physname until later. */
7315 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
7317 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
7322 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
7323 fnp
->physname
= physname
? physname
: "";
7326 fnp
->type
= alloc_type (objfile
);
7327 this_type
= read_type_die (die
, cu
);
7328 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
7330 int nparams
= TYPE_NFIELDS (this_type
);
7332 /* TYPE is the domain of this method, and THIS_TYPE is the type
7333 of the method itself (TYPE_CODE_METHOD). */
7334 smash_to_method_type (fnp
->type
, type
,
7335 TYPE_TARGET_TYPE (this_type
),
7336 TYPE_FIELDS (this_type
),
7337 TYPE_NFIELDS (this_type
),
7338 TYPE_VARARGS (this_type
));
7340 /* Handle static member functions.
7341 Dwarf2 has no clean way to discern C++ static and non-static
7342 member functions. G++ helps GDB by marking the first
7343 parameter for non-static member functions (which is the this
7344 pointer) as artificial. We obtain this information from
7345 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
7346 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
7347 fnp
->voffset
= VOFFSET_STATIC
;
7350 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
7351 dwarf2_full_name (fieldname
, die
, cu
));
7353 /* Get fcontext from DW_AT_containing_type if present. */
7354 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7355 fnp
->fcontext
= die_containing_type (die
, cu
);
7357 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
7358 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
7360 /* Get accessibility. */
7361 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
7363 accessibility
= DW_UNSND (attr
);
7365 accessibility
= dwarf2_default_access_attribute (die
, cu
);
7366 switch (accessibility
)
7368 case DW_ACCESS_private
:
7369 fnp
->is_private
= 1;
7371 case DW_ACCESS_protected
:
7372 fnp
->is_protected
= 1;
7376 /* Check for artificial methods. */
7377 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
7378 if (attr
&& DW_UNSND (attr
) != 0)
7379 fnp
->is_artificial
= 1;
7381 /* Get index in virtual function table if it is a virtual member
7382 function. For older versions of GCC, this is an offset in the
7383 appropriate virtual table, as specified by DW_AT_containing_type.
7384 For everyone else, it is an expression to be evaluated relative
7385 to the object address. */
7387 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
7390 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
7392 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
7394 /* Old-style GCC. */
7395 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
7397 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
7398 || (DW_BLOCK (attr
)->size
> 1
7399 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
7400 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
7402 struct dwarf_block blk
;
7405 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
7407 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
7408 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
7409 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7410 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
7411 dwarf2_complex_location_expr_complaint ();
7413 fnp
->voffset
/= cu
->header
.addr_size
;
7417 dwarf2_complex_location_expr_complaint ();
7420 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
7422 else if (attr_form_is_section_offset (attr
))
7424 dwarf2_complex_location_expr_complaint ();
7428 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
7434 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
7435 if (attr
&& DW_UNSND (attr
))
7437 /* GCC does this, as of 2008-08-25; PR debug/37237. */
7438 complaint (&symfile_complaints
,
7439 _("Member function \"%s\" (offset %d) is virtual "
7440 "but the vtable offset is not specified"),
7441 fieldname
, die
->offset
);
7442 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7443 TYPE_CPLUS_DYNAMIC (type
) = 1;
7448 /* Create the vector of member function fields, and attach it to the type. */
7451 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
7452 struct dwarf2_cu
*cu
)
7454 struct fnfieldlist
*flp
;
7457 if (cu
->language
== language_ada
)
7458 error (_("unexpected member functions in Ada type"));
7460 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7461 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
7462 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
7464 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
7466 struct nextfnfield
*nfp
= flp
->head
;
7467 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
7470 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
7471 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
7472 fn_flp
->fn_fields
= (struct fn_field
*)
7473 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
7474 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
7475 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
7478 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
7481 /* Returns non-zero if NAME is the name of a vtable member in CU's
7482 language, zero otherwise. */
7484 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
7486 static const char vptr
[] = "_vptr";
7487 static const char vtable
[] = "vtable";
7489 /* Look for the C++ and Java forms of the vtable. */
7490 if ((cu
->language
== language_java
7491 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
7492 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
7493 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
7499 /* GCC outputs unnamed structures that are really pointers to member
7500 functions, with the ABI-specified layout. If TYPE describes
7501 such a structure, smash it into a member function type.
7503 GCC shouldn't do this; it should just output pointer to member DIEs.
7504 This is GCC PR debug/28767. */
7507 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
7509 struct type
*pfn_type
, *domain_type
, *new_type
;
7511 /* Check for a structure with no name and two children. */
7512 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
7515 /* Check for __pfn and __delta members. */
7516 if (TYPE_FIELD_NAME (type
, 0) == NULL
7517 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
7518 || TYPE_FIELD_NAME (type
, 1) == NULL
7519 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
7522 /* Find the type of the method. */
7523 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
7524 if (pfn_type
== NULL
7525 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
7526 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
7529 /* Look for the "this" argument. */
7530 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
7531 if (TYPE_NFIELDS (pfn_type
) == 0
7532 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
7533 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
7536 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
7537 new_type
= alloc_type (objfile
);
7538 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
7539 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
7540 TYPE_VARARGS (pfn_type
));
7541 smash_to_methodptr_type (type
, new_type
);
7544 /* Called when we find the DIE that starts a structure or union scope
7545 (definition) to create a type for the structure or union. Fill in
7546 the type's name and general properties; the members will not be
7547 processed until process_structure_type.
7549 NOTE: we need to call these functions regardless of whether or not the
7550 DIE has a DW_AT_name attribute, since it might be an anonymous
7551 structure or union. This gets the type entered into our set of
7554 However, if the structure is incomplete (an opaque struct/union)
7555 then suppress creating a symbol table entry for it since gdb only
7556 wants to find the one with the complete definition. Note that if
7557 it is complete, we just call new_symbol, which does it's own
7558 checking about whether the struct/union is anonymous or not (and
7559 suppresses creating a symbol table entry itself). */
7561 static struct type
*
7562 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7564 struct objfile
*objfile
= cu
->objfile
;
7566 struct attribute
*attr
;
7569 /* If the definition of this type lives in .debug_types, read that type.
7570 Don't follow DW_AT_specification though, that will take us back up
7571 the chain and we want to go down. */
7572 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7575 struct dwarf2_cu
*type_cu
= cu
;
7576 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7578 /* We could just recurse on read_structure_type, but we need to call
7579 get_die_type to ensure only one type for this DIE is created.
7580 This is important, for example, because for c++ classes we need
7581 TYPE_NAME set which is only done by new_symbol. Blech. */
7582 type
= read_type_die (type_die
, type_cu
);
7584 /* TYPE_CU may not be the same as CU.
7585 Ensure TYPE is recorded in CU's type_hash table. */
7586 return set_die_type (die
, type
, cu
);
7589 type
= alloc_type (objfile
);
7590 INIT_CPLUS_SPECIFIC (type
);
7592 name
= dwarf2_name (die
, cu
);
7595 if (cu
->language
== language_cplus
7596 || cu
->language
== language_java
)
7598 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
7600 /* dwarf2_full_name might have already finished building the DIE's
7601 type. If so, there is no need to continue. */
7602 if (get_die_type (die
, cu
) != NULL
)
7603 return get_die_type (die
, cu
);
7605 TYPE_TAG_NAME (type
) = full_name
;
7606 if (die
->tag
== DW_TAG_structure_type
7607 || die
->tag
== DW_TAG_class_type
)
7608 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
7612 /* The name is already allocated along with this objfile, so
7613 we don't need to duplicate it for the type. */
7614 TYPE_TAG_NAME (type
) = (char *) name
;
7615 if (die
->tag
== DW_TAG_class_type
)
7616 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
7620 if (die
->tag
== DW_TAG_structure_type
)
7622 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
7624 else if (die
->tag
== DW_TAG_union_type
)
7626 TYPE_CODE (type
) = TYPE_CODE_UNION
;
7630 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
7633 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
7634 TYPE_DECLARED_CLASS (type
) = 1;
7636 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7639 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7643 TYPE_LENGTH (type
) = 0;
7646 TYPE_STUB_SUPPORTED (type
) = 1;
7647 if (die_is_declaration (die
, cu
))
7648 TYPE_STUB (type
) = 1;
7649 else if (attr
== NULL
&& die
->child
== NULL
7650 && producer_is_realview (cu
->producer
))
7651 /* RealView does not output the required DW_AT_declaration
7652 on incomplete types. */
7653 TYPE_STUB (type
) = 1;
7655 /* We need to add the type field to the die immediately so we don't
7656 infinitely recurse when dealing with pointers to the structure
7657 type within the structure itself. */
7658 set_die_type (die
, type
, cu
);
7660 /* set_die_type should be already done. */
7661 set_descriptive_type (type
, die
, cu
);
7666 /* Finish creating a structure or union type, including filling in
7667 its members and creating a symbol for it. */
7670 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7672 struct objfile
*objfile
= cu
->objfile
;
7673 struct die_info
*child_die
= die
->child
;
7676 type
= get_die_type (die
, cu
);
7678 type
= read_structure_type (die
, cu
);
7680 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
7682 struct field_info fi
;
7683 struct die_info
*child_die
;
7684 VEC (symbolp
) *template_args
= NULL
;
7685 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7687 memset (&fi
, 0, sizeof (struct field_info
));
7689 child_die
= die
->child
;
7691 while (child_die
&& child_die
->tag
)
7693 if (child_die
->tag
== DW_TAG_member
7694 || child_die
->tag
== DW_TAG_variable
)
7696 /* NOTE: carlton/2002-11-05: A C++ static data member
7697 should be a DW_TAG_member that is a declaration, but
7698 all versions of G++ as of this writing (so through at
7699 least 3.2.1) incorrectly generate DW_TAG_variable
7700 tags for them instead. */
7701 dwarf2_add_field (&fi
, child_die
, cu
);
7703 else if (child_die
->tag
== DW_TAG_subprogram
)
7705 /* C++ member function. */
7706 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
7708 else if (child_die
->tag
== DW_TAG_inheritance
)
7710 /* C++ base class field. */
7711 dwarf2_add_field (&fi
, child_die
, cu
);
7713 else if (child_die
->tag
== DW_TAG_typedef
)
7714 dwarf2_add_typedef (&fi
, child_die
, cu
);
7715 else if (child_die
->tag
== DW_TAG_template_type_param
7716 || child_die
->tag
== DW_TAG_template_value_param
)
7718 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7721 VEC_safe_push (symbolp
, template_args
, arg
);
7724 child_die
= sibling_die (child_die
);
7727 /* Attach template arguments to type. */
7728 if (! VEC_empty (symbolp
, template_args
))
7730 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7731 TYPE_N_TEMPLATE_ARGUMENTS (type
)
7732 = VEC_length (symbolp
, template_args
);
7733 TYPE_TEMPLATE_ARGUMENTS (type
)
7734 = obstack_alloc (&objfile
->objfile_obstack
,
7735 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7736 * sizeof (struct symbol
*)));
7737 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
7738 VEC_address (symbolp
, template_args
),
7739 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7740 * sizeof (struct symbol
*)));
7741 VEC_free (symbolp
, template_args
);
7744 /* Attach fields and member functions to the type. */
7746 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
7749 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
7751 /* Get the type which refers to the base class (possibly this
7752 class itself) which contains the vtable pointer for the current
7753 class from the DW_AT_containing_type attribute. This use of
7754 DW_AT_containing_type is a GNU extension. */
7756 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7758 struct type
*t
= die_containing_type (die
, cu
);
7760 TYPE_VPTR_BASETYPE (type
) = t
;
7765 /* Our own class provides vtbl ptr. */
7766 for (i
= TYPE_NFIELDS (t
) - 1;
7767 i
>= TYPE_N_BASECLASSES (t
);
7770 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
7772 if (is_vtable_name (fieldname
, cu
))
7774 TYPE_VPTR_FIELDNO (type
) = i
;
7779 /* Complain if virtual function table field not found. */
7780 if (i
< TYPE_N_BASECLASSES (t
))
7781 complaint (&symfile_complaints
,
7782 _("virtual function table pointer "
7783 "not found when defining class '%s'"),
7784 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
7789 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
7792 else if (cu
->producer
7793 && strncmp (cu
->producer
,
7794 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7796 /* The IBM XLC compiler does not provide direct indication
7797 of the containing type, but the vtable pointer is
7798 always named __vfp. */
7802 for (i
= TYPE_NFIELDS (type
) - 1;
7803 i
>= TYPE_N_BASECLASSES (type
);
7806 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
7808 TYPE_VPTR_FIELDNO (type
) = i
;
7809 TYPE_VPTR_BASETYPE (type
) = type
;
7816 /* Copy fi.typedef_field_list linked list elements content into the
7817 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7818 if (fi
.typedef_field_list
)
7820 int i
= fi
.typedef_field_list_count
;
7822 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7823 TYPE_TYPEDEF_FIELD_ARRAY (type
)
7824 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
7825 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
7827 /* Reverse the list order to keep the debug info elements order. */
7830 struct typedef_field
*dest
, *src
;
7832 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
7833 src
= &fi
.typedef_field_list
->field
;
7834 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
7839 do_cleanups (back_to
);
7841 if (HAVE_CPLUS_STRUCT (type
))
7842 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
7845 quirk_gcc_member_function_pointer (type
, objfile
);
7847 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7848 snapshots) has been known to create a die giving a declaration
7849 for a class that has, as a child, a die giving a definition for a
7850 nested class. So we have to process our children even if the
7851 current die is a declaration. Normally, of course, a declaration
7852 won't have any children at all. */
7854 while (child_die
!= NULL
&& child_die
->tag
)
7856 if (child_die
->tag
== DW_TAG_member
7857 || child_die
->tag
== DW_TAG_variable
7858 || child_die
->tag
== DW_TAG_inheritance
7859 || child_die
->tag
== DW_TAG_template_value_param
7860 || child_die
->tag
== DW_TAG_template_type_param
)
7865 process_die (child_die
, cu
);
7867 child_die
= sibling_die (child_die
);
7870 /* Do not consider external references. According to the DWARF standard,
7871 these DIEs are identified by the fact that they have no byte_size
7872 attribute, and a declaration attribute. */
7873 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7874 || !die_is_declaration (die
, cu
))
7875 new_symbol (die
, type
, cu
);
7878 /* Given a DW_AT_enumeration_type die, set its type. We do not
7879 complete the type's fields yet, or create any symbols. */
7881 static struct type
*
7882 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7884 struct objfile
*objfile
= cu
->objfile
;
7886 struct attribute
*attr
;
7889 /* If the definition of this type lives in .debug_types, read that type.
7890 Don't follow DW_AT_specification though, that will take us back up
7891 the chain and we want to go down. */
7892 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7895 struct dwarf2_cu
*type_cu
= cu
;
7896 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7898 type
= read_type_die (type_die
, type_cu
);
7900 /* TYPE_CU may not be the same as CU.
7901 Ensure TYPE is recorded in CU's type_hash table. */
7902 return set_die_type (die
, type
, cu
);
7905 type
= alloc_type (objfile
);
7907 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7908 name
= dwarf2_full_name (NULL
, die
, cu
);
7910 TYPE_TAG_NAME (type
) = (char *) name
;
7912 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7915 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7919 TYPE_LENGTH (type
) = 0;
7922 /* The enumeration DIE can be incomplete. In Ada, any type can be
7923 declared as private in the package spec, and then defined only
7924 inside the package body. Such types are known as Taft Amendment
7925 Types. When another package uses such a type, an incomplete DIE
7926 may be generated by the compiler. */
7927 if (die_is_declaration (die
, cu
))
7928 TYPE_STUB (type
) = 1;
7930 return set_die_type (die
, type
, cu
);
7933 /* Given a pointer to a die which begins an enumeration, process all
7934 the dies that define the members of the enumeration, and create the
7935 symbol for the enumeration type.
7937 NOTE: We reverse the order of the element list. */
7940 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7942 struct type
*this_type
;
7944 this_type
= get_die_type (die
, cu
);
7945 if (this_type
== NULL
)
7946 this_type
= read_enumeration_type (die
, cu
);
7948 if (die
->child
!= NULL
)
7950 struct die_info
*child_die
;
7952 struct field
*fields
= NULL
;
7954 int unsigned_enum
= 1;
7959 child_die
= die
->child
;
7960 while (child_die
&& child_die
->tag
)
7962 if (child_die
->tag
!= DW_TAG_enumerator
)
7964 process_die (child_die
, cu
);
7968 name
= dwarf2_name (child_die
, cu
);
7971 sym
= new_symbol (child_die
, this_type
, cu
);
7972 if (SYMBOL_VALUE (sym
) < 0)
7977 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
7980 mask
|= SYMBOL_VALUE (sym
);
7982 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7984 fields
= (struct field
*)
7986 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7987 * sizeof (struct field
));
7990 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7991 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7992 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7993 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7999 child_die
= sibling_die (child_die
);
8004 TYPE_NFIELDS (this_type
) = num_fields
;
8005 TYPE_FIELDS (this_type
) = (struct field
*)
8006 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
8007 memcpy (TYPE_FIELDS (this_type
), fields
,
8008 sizeof (struct field
) * num_fields
);
8012 TYPE_UNSIGNED (this_type
) = 1;
8014 TYPE_FLAG_ENUM (this_type
) = 1;
8017 /* If we are reading an enum from a .debug_types unit, and the enum
8018 is a declaration, and the enum is not the signatured type in the
8019 unit, then we do not want to add a symbol for it. Adding a
8020 symbol would in some cases obscure the true definition of the
8021 enum, giving users an incomplete type when the definition is
8022 actually available. Note that we do not want to do this for all
8023 enums which are just declarations, because C++0x allows forward
8024 enum declarations. */
8025 if (cu
->per_cu
->debug_types_section
8026 && die_is_declaration (die
, cu
))
8028 struct signatured_type
*type_sig
;
8031 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
8032 cu
->per_cu
->debug_types_section
,
8033 cu
->per_cu
->offset
);
8034 if (type_sig
->per_cu
.offset
+ type_sig
->type_offset
8039 new_symbol (die
, this_type
, cu
);
8042 /* Extract all information from a DW_TAG_array_type DIE and put it in
8043 the DIE's type field. For now, this only handles one dimensional
8046 static struct type
*
8047 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8049 struct objfile
*objfile
= cu
->objfile
;
8050 struct die_info
*child_die
;
8052 struct type
*element_type
, *range_type
, *index_type
;
8053 struct type
**range_types
= NULL
;
8054 struct attribute
*attr
;
8056 struct cleanup
*back_to
;
8059 element_type
= die_type (die
, cu
);
8061 /* The die_type call above may have already set the type for this DIE. */
8062 type
= get_die_type (die
, cu
);
8066 /* Irix 6.2 native cc creates array types without children for
8067 arrays with unspecified length. */
8068 if (die
->child
== NULL
)
8070 index_type
= objfile_type (objfile
)->builtin_int
;
8071 range_type
= create_range_type (NULL
, index_type
, 0, -1);
8072 type
= create_array_type (NULL
, element_type
, range_type
);
8073 return set_die_type (die
, type
, cu
);
8076 back_to
= make_cleanup (null_cleanup
, NULL
);
8077 child_die
= die
->child
;
8078 while (child_die
&& child_die
->tag
)
8080 if (child_die
->tag
== DW_TAG_subrange_type
)
8082 struct type
*child_type
= read_type_die (child_die
, cu
);
8084 if (child_type
!= NULL
)
8086 /* The range type was succesfully read. Save it for the
8087 array type creation. */
8088 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
8090 range_types
= (struct type
**)
8091 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
8092 * sizeof (struct type
*));
8094 make_cleanup (free_current_contents
, &range_types
);
8096 range_types
[ndim
++] = child_type
;
8099 child_die
= sibling_die (child_die
);
8102 /* Dwarf2 dimensions are output from left to right, create the
8103 necessary array types in backwards order. */
8105 type
= element_type
;
8107 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
8112 type
= create_array_type (NULL
, type
, range_types
[i
++]);
8117 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
8120 /* Understand Dwarf2 support for vector types (like they occur on
8121 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
8122 array type. This is not part of the Dwarf2/3 standard yet, but a
8123 custom vendor extension. The main difference between a regular
8124 array and the vector variant is that vectors are passed by value
8126 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
8128 make_vector_type (type
);
8130 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
8131 implementation may choose to implement triple vectors using this
8133 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8136 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
8137 TYPE_LENGTH (type
) = DW_UNSND (attr
);
8139 complaint (&symfile_complaints
,
8140 _("DW_AT_byte_size for array type smaller "
8141 "than the total size of elements"));
8144 name
= dwarf2_name (die
, cu
);
8146 TYPE_NAME (type
) = name
;
8148 /* Install the type in the die. */
8149 set_die_type (die
, type
, cu
);
8151 /* set_die_type should be already done. */
8152 set_descriptive_type (type
, die
, cu
);
8154 do_cleanups (back_to
);
8159 static enum dwarf_array_dim_ordering
8160 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
8162 struct attribute
*attr
;
8164 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
8166 if (attr
) return DW_SND (attr
);
8168 /* GNU F77 is a special case, as at 08/2004 array type info is the
8169 opposite order to the dwarf2 specification, but data is still
8170 laid out as per normal fortran.
8172 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
8173 version checking. */
8175 if (cu
->language
== language_fortran
8176 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
8178 return DW_ORD_row_major
;
8181 switch (cu
->language_defn
->la_array_ordering
)
8183 case array_column_major
:
8184 return DW_ORD_col_major
;
8185 case array_row_major
:
8187 return DW_ORD_row_major
;
8191 /* Extract all information from a DW_TAG_set_type DIE and put it in
8192 the DIE's type field. */
8194 static struct type
*
8195 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8197 struct type
*domain_type
, *set_type
;
8198 struct attribute
*attr
;
8200 domain_type
= die_type (die
, cu
);
8202 /* The die_type call above may have already set the type for this DIE. */
8203 set_type
= get_die_type (die
, cu
);
8207 set_type
= create_set_type (NULL
, domain_type
);
8209 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8211 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
8213 return set_die_type (die
, set_type
, cu
);
8216 /* First cut: install each common block member as a global variable. */
8219 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
8221 struct die_info
*child_die
;
8222 struct attribute
*attr
;
8224 CORE_ADDR base
= (CORE_ADDR
) 0;
8226 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8229 /* Support the .debug_loc offsets. */
8230 if (attr_form_is_block (attr
))
8232 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
8234 else if (attr_form_is_section_offset (attr
))
8236 dwarf2_complex_location_expr_complaint ();
8240 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8241 "common block member");
8244 if (die
->child
!= NULL
)
8246 child_die
= die
->child
;
8247 while (child_die
&& child_die
->tag
)
8251 sym
= new_symbol (child_die
, NULL
, cu
);
8253 && handle_data_member_location (child_die
, cu
, &offset
))
8255 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
8256 add_symbol_to_list (sym
, &global_symbols
);
8258 child_die
= sibling_die (child_die
);
8263 /* Create a type for a C++ namespace. */
8265 static struct type
*
8266 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8268 struct objfile
*objfile
= cu
->objfile
;
8269 const char *previous_prefix
, *name
;
8273 /* For extensions, reuse the type of the original namespace. */
8274 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
8276 struct die_info
*ext_die
;
8277 struct dwarf2_cu
*ext_cu
= cu
;
8279 ext_die
= dwarf2_extension (die
, &ext_cu
);
8280 type
= read_type_die (ext_die
, ext_cu
);
8282 /* EXT_CU may not be the same as CU.
8283 Ensure TYPE is recorded in CU's type_hash table. */
8284 return set_die_type (die
, type
, cu
);
8287 name
= namespace_name (die
, &is_anonymous
, cu
);
8289 /* Now build the name of the current namespace. */
8291 previous_prefix
= determine_prefix (die
, cu
);
8292 if (previous_prefix
[0] != '\0')
8293 name
= typename_concat (&objfile
->objfile_obstack
,
8294 previous_prefix
, name
, 0, cu
);
8296 /* Create the type. */
8297 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
8299 TYPE_NAME (type
) = (char *) name
;
8300 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8302 return set_die_type (die
, type
, cu
);
8305 /* Read a C++ namespace. */
8308 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8310 struct objfile
*objfile
= cu
->objfile
;
8313 /* Add a symbol associated to this if we haven't seen the namespace
8314 before. Also, add a using directive if it's an anonymous
8317 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
8321 type
= read_type_die (die
, cu
);
8322 new_symbol (die
, type
, cu
);
8324 namespace_name (die
, &is_anonymous
, cu
);
8327 const char *previous_prefix
= determine_prefix (die
, cu
);
8329 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
8330 NULL
, NULL
, &objfile
->objfile_obstack
);
8334 if (die
->child
!= NULL
)
8336 struct die_info
*child_die
= die
->child
;
8338 while (child_die
&& child_die
->tag
)
8340 process_die (child_die
, cu
);
8341 child_die
= sibling_die (child_die
);
8346 /* Read a Fortran module as type. This DIE can be only a declaration used for
8347 imported module. Still we need that type as local Fortran "use ... only"
8348 declaration imports depend on the created type in determine_prefix. */
8350 static struct type
*
8351 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8353 struct objfile
*objfile
= cu
->objfile
;
8357 module_name
= dwarf2_name (die
, cu
);
8359 complaint (&symfile_complaints
,
8360 _("DW_TAG_module has no name, offset 0x%x"),
8362 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
8364 /* determine_prefix uses TYPE_TAG_NAME. */
8365 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8367 return set_die_type (die
, type
, cu
);
8370 /* Read a Fortran module. */
8373 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
8375 struct die_info
*child_die
= die
->child
;
8377 while (child_die
&& child_die
->tag
)
8379 process_die (child_die
, cu
);
8380 child_die
= sibling_die (child_die
);
8384 /* Return the name of the namespace represented by DIE. Set
8385 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
8389 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
8391 struct die_info
*current_die
;
8392 const char *name
= NULL
;
8394 /* Loop through the extensions until we find a name. */
8396 for (current_die
= die
;
8397 current_die
!= NULL
;
8398 current_die
= dwarf2_extension (die
, &cu
))
8400 name
= dwarf2_name (current_die
, cu
);
8405 /* Is it an anonymous namespace? */
8407 *is_anonymous
= (name
== NULL
);
8409 name
= CP_ANONYMOUS_NAMESPACE_STR
;
8414 /* Extract all information from a DW_TAG_pointer_type DIE and add to
8415 the user defined type vector. */
8417 static struct type
*
8418 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8420 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
8421 struct comp_unit_head
*cu_header
= &cu
->header
;
8423 struct attribute
*attr_byte_size
;
8424 struct attribute
*attr_address_class
;
8425 int byte_size
, addr_class
;
8426 struct type
*target_type
;
8428 target_type
= die_type (die
, cu
);
8430 /* The die_type call above may have already set the type for this DIE. */
8431 type
= get_die_type (die
, cu
);
8435 type
= lookup_pointer_type (target_type
);
8437 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8439 byte_size
= DW_UNSND (attr_byte_size
);
8441 byte_size
= cu_header
->addr_size
;
8443 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
8444 if (attr_address_class
)
8445 addr_class
= DW_UNSND (attr_address_class
);
8447 addr_class
= DW_ADDR_none
;
8449 /* If the pointer size or address class is different than the
8450 default, create a type variant marked as such and set the
8451 length accordingly. */
8452 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
8454 if (gdbarch_address_class_type_flags_p (gdbarch
))
8458 type_flags
= gdbarch_address_class_type_flags
8459 (gdbarch
, byte_size
, addr_class
);
8460 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
8462 type
= make_type_with_address_space (type
, type_flags
);
8464 else if (TYPE_LENGTH (type
) != byte_size
)
8466 complaint (&symfile_complaints
,
8467 _("invalid pointer size %d"), byte_size
);
8471 /* Should we also complain about unhandled address classes? */
8475 TYPE_LENGTH (type
) = byte_size
;
8476 return set_die_type (die
, type
, cu
);
8479 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
8480 the user defined type vector. */
8482 static struct type
*
8483 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8486 struct type
*to_type
;
8487 struct type
*domain
;
8489 to_type
= die_type (die
, cu
);
8490 domain
= die_containing_type (die
, cu
);
8492 /* The calls above may have already set the type for this DIE. */
8493 type
= get_die_type (die
, cu
);
8497 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
8498 type
= lookup_methodptr_type (to_type
);
8500 type
= lookup_memberptr_type (to_type
, domain
);
8502 return set_die_type (die
, type
, cu
);
8505 /* Extract all information from a DW_TAG_reference_type DIE and add to
8506 the user defined type vector. */
8508 static struct type
*
8509 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8511 struct comp_unit_head
*cu_header
= &cu
->header
;
8512 struct type
*type
, *target_type
;
8513 struct attribute
*attr
;
8515 target_type
= die_type (die
, cu
);
8517 /* The die_type call above may have already set the type for this DIE. */
8518 type
= get_die_type (die
, cu
);
8522 type
= lookup_reference_type (target_type
);
8523 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8526 TYPE_LENGTH (type
) = DW_UNSND (attr
);
8530 TYPE_LENGTH (type
) = cu_header
->addr_size
;
8532 return set_die_type (die
, type
, cu
);
8535 static struct type
*
8536 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8538 struct type
*base_type
, *cv_type
;
8540 base_type
= die_type (die
, cu
);
8542 /* The die_type call above may have already set the type for this DIE. */
8543 cv_type
= get_die_type (die
, cu
);
8547 /* In case the const qualifier is applied to an array type, the element type
8548 is so qualified, not the array type (section 6.7.3 of C99). */
8549 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
8551 struct type
*el_type
, *inner_array
;
8553 base_type
= copy_type (base_type
);
8554 inner_array
= base_type
;
8556 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
8558 TYPE_TARGET_TYPE (inner_array
) =
8559 copy_type (TYPE_TARGET_TYPE (inner_array
));
8560 inner_array
= TYPE_TARGET_TYPE (inner_array
);
8563 el_type
= TYPE_TARGET_TYPE (inner_array
);
8564 TYPE_TARGET_TYPE (inner_array
) =
8565 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
8567 return set_die_type (die
, base_type
, cu
);
8570 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
8571 return set_die_type (die
, cv_type
, cu
);
8574 static struct type
*
8575 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8577 struct type
*base_type
, *cv_type
;
8579 base_type
= die_type (die
, cu
);
8581 /* The die_type call above may have already set the type for this DIE. */
8582 cv_type
= get_die_type (die
, cu
);
8586 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
8587 return set_die_type (die
, cv_type
, cu
);
8590 /* Extract all information from a DW_TAG_string_type DIE and add to
8591 the user defined type vector. It isn't really a user defined type,
8592 but it behaves like one, with other DIE's using an AT_user_def_type
8593 attribute to reference it. */
8595 static struct type
*
8596 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8598 struct objfile
*objfile
= cu
->objfile
;
8599 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8600 struct type
*type
, *range_type
, *index_type
, *char_type
;
8601 struct attribute
*attr
;
8602 unsigned int length
;
8604 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
8607 length
= DW_UNSND (attr
);
8611 /* Check for the DW_AT_byte_size attribute. */
8612 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8615 length
= DW_UNSND (attr
);
8623 index_type
= objfile_type (objfile
)->builtin_int
;
8624 range_type
= create_range_type (NULL
, index_type
, 1, length
);
8625 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
8626 type
= create_string_type (NULL
, char_type
, range_type
);
8628 return set_die_type (die
, type
, cu
);
8631 /* Handle DIES due to C code like:
8635 int (*funcp)(int a, long l);
8639 ('funcp' generates a DW_TAG_subroutine_type DIE). */
8641 static struct type
*
8642 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8644 struct objfile
*objfile
= cu
->objfile
;
8645 struct type
*type
; /* Type that this function returns. */
8646 struct type
*ftype
; /* Function that returns above type. */
8647 struct attribute
*attr
;
8649 type
= die_type (die
, cu
);
8651 /* The die_type call above may have already set the type for this DIE. */
8652 ftype
= get_die_type (die
, cu
);
8656 ftype
= lookup_function_type (type
);
8658 /* All functions in C++, Pascal and Java have prototypes. */
8659 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
8660 if ((attr
&& (DW_UNSND (attr
) != 0))
8661 || cu
->language
== language_cplus
8662 || cu
->language
== language_java
8663 || cu
->language
== language_pascal
)
8664 TYPE_PROTOTYPED (ftype
) = 1;
8665 else if (producer_is_realview (cu
->producer
))
8666 /* RealView does not emit DW_AT_prototyped. We can not
8667 distinguish prototyped and unprototyped functions; default to
8668 prototyped, since that is more common in modern code (and
8669 RealView warns about unprototyped functions). */
8670 TYPE_PROTOTYPED (ftype
) = 1;
8672 /* Store the calling convention in the type if it's available in
8673 the subroutine die. Otherwise set the calling convention to
8674 the default value DW_CC_normal. */
8675 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
8677 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
8678 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
8679 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
8681 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
8683 /* We need to add the subroutine type to the die immediately so
8684 we don't infinitely recurse when dealing with parameters
8685 declared as the same subroutine type. */
8686 set_die_type (die
, ftype
, cu
);
8688 if (die
->child
!= NULL
)
8690 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
8691 struct die_info
*child_die
;
8692 int nparams
, iparams
;
8694 /* Count the number of parameters.
8695 FIXME: GDB currently ignores vararg functions, but knows about
8696 vararg member functions. */
8698 child_die
= die
->child
;
8699 while (child_die
&& child_die
->tag
)
8701 if (child_die
->tag
== DW_TAG_formal_parameter
)
8703 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
8704 TYPE_VARARGS (ftype
) = 1;
8705 child_die
= sibling_die (child_die
);
8708 /* Allocate storage for parameters and fill them in. */
8709 TYPE_NFIELDS (ftype
) = nparams
;
8710 TYPE_FIELDS (ftype
) = (struct field
*)
8711 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
8713 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
8714 even if we error out during the parameters reading below. */
8715 for (iparams
= 0; iparams
< nparams
; iparams
++)
8716 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
8719 child_die
= die
->child
;
8720 while (child_die
&& child_die
->tag
)
8722 if (child_die
->tag
== DW_TAG_formal_parameter
)
8724 struct type
*arg_type
;
8726 /* DWARF version 2 has no clean way to discern C++
8727 static and non-static member functions. G++ helps
8728 GDB by marking the first parameter for non-static
8729 member functions (which is the this pointer) as
8730 artificial. We pass this information to
8731 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
8733 DWARF version 3 added DW_AT_object_pointer, which GCC
8734 4.5 does not yet generate. */
8735 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
8737 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
8740 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
8742 /* GCC/43521: In java, the formal parameter
8743 "this" is sometimes not marked with DW_AT_artificial. */
8744 if (cu
->language
== language_java
)
8746 const char *name
= dwarf2_name (child_die
, cu
);
8748 if (name
&& !strcmp (name
, "this"))
8749 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
8752 arg_type
= die_type (child_die
, cu
);
8754 /* RealView does not mark THIS as const, which the testsuite
8755 expects. GCC marks THIS as const in method definitions,
8756 but not in the class specifications (GCC PR 43053). */
8757 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
8758 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
8761 struct dwarf2_cu
*arg_cu
= cu
;
8762 const char *name
= dwarf2_name (child_die
, cu
);
8764 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
8767 /* If the compiler emits this, use it. */
8768 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
8771 else if (name
&& strcmp (name
, "this") == 0)
8772 /* Function definitions will have the argument names. */
8774 else if (name
== NULL
&& iparams
== 0)
8775 /* Declarations may not have the names, so like
8776 elsewhere in GDB, assume an artificial first
8777 argument is "this". */
8781 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
8785 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
8788 child_die
= sibling_die (child_die
);
8795 static struct type
*
8796 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
8798 struct objfile
*objfile
= cu
->objfile
;
8799 const char *name
= NULL
;
8800 struct type
*this_type
, *target_type
;
8802 name
= dwarf2_full_name (NULL
, die
, cu
);
8803 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
8804 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
8805 TYPE_NAME (this_type
) = (char *) name
;
8806 set_die_type (die
, this_type
, cu
);
8807 target_type
= die_type (die
, cu
);
8808 if (target_type
!= this_type
)
8809 TYPE_TARGET_TYPE (this_type
) = target_type
;
8812 /* Self-referential typedefs are, it seems, not allowed by the DWARF
8813 spec and cause infinite loops in GDB. */
8814 complaint (&symfile_complaints
,
8815 _("Self-referential DW_TAG_typedef "
8816 "- DIE at 0x%x [in module %s]"),
8817 die
->offset
, objfile
->name
);
8818 TYPE_TARGET_TYPE (this_type
) = NULL
;
8823 /* Find a representation of a given base type and install
8824 it in the TYPE field of the die. */
8826 static struct type
*
8827 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8829 struct objfile
*objfile
= cu
->objfile
;
8831 struct attribute
*attr
;
8832 int encoding
= 0, size
= 0;
8834 enum type_code code
= TYPE_CODE_INT
;
8836 struct type
*target_type
= NULL
;
8838 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
8841 encoding
= DW_UNSND (attr
);
8843 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8846 size
= DW_UNSND (attr
);
8848 name
= dwarf2_name (die
, cu
);
8851 complaint (&symfile_complaints
,
8852 _("DW_AT_name missing from DW_TAG_base_type"));
8857 case DW_ATE_address
:
8858 /* Turn DW_ATE_address into a void * pointer. */
8859 code
= TYPE_CODE_PTR
;
8860 type_flags
|= TYPE_FLAG_UNSIGNED
;
8861 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
8863 case DW_ATE_boolean
:
8864 code
= TYPE_CODE_BOOL
;
8865 type_flags
|= TYPE_FLAG_UNSIGNED
;
8867 case DW_ATE_complex_float
:
8868 code
= TYPE_CODE_COMPLEX
;
8869 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
8871 case DW_ATE_decimal_float
:
8872 code
= TYPE_CODE_DECFLOAT
;
8875 code
= TYPE_CODE_FLT
;
8879 case DW_ATE_unsigned
:
8880 type_flags
|= TYPE_FLAG_UNSIGNED
;
8881 if (cu
->language
== language_fortran
8883 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
8884 code
= TYPE_CODE_CHAR
;
8886 case DW_ATE_signed_char
:
8887 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8888 || cu
->language
== language_pascal
8889 || cu
->language
== language_fortran
)
8890 code
= TYPE_CODE_CHAR
;
8892 case DW_ATE_unsigned_char
:
8893 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8894 || cu
->language
== language_pascal
8895 || cu
->language
== language_fortran
)
8896 code
= TYPE_CODE_CHAR
;
8897 type_flags
|= TYPE_FLAG_UNSIGNED
;
8900 /* We just treat this as an integer and then recognize the
8901 type by name elsewhere. */
8905 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
8906 dwarf_type_encoding_name (encoding
));
8910 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
8911 TYPE_NAME (type
) = name
;
8912 TYPE_TARGET_TYPE (type
) = target_type
;
8914 if (name
&& strcmp (name
, "char") == 0)
8915 TYPE_NOSIGN (type
) = 1;
8917 return set_die_type (die
, type
, cu
);
8920 /* Read the given DW_AT_subrange DIE. */
8922 static struct type
*
8923 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8925 struct type
*base_type
;
8926 struct type
*range_type
;
8927 struct attribute
*attr
;
8931 LONGEST negative_mask
;
8933 base_type
= die_type (die
, cu
);
8934 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8935 check_typedef (base_type
);
8937 /* The die_type call above may have already set the type for this DIE. */
8938 range_type
= get_die_type (die
, cu
);
8942 if (cu
->language
== language_fortran
)
8944 /* FORTRAN implies a lower bound of 1, if not given. */
8948 /* FIXME: For variable sized arrays either of these could be
8949 a variable rather than a constant value. We'll allow it,
8950 but we don't know how to handle it. */
8951 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
8953 low
= dwarf2_get_attr_constant_value (attr
, 0);
8955 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8958 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
8960 /* GCC encodes arrays with unspecified or dynamic length
8961 with a DW_FORM_block1 attribute or a reference attribute.
8962 FIXME: GDB does not yet know how to handle dynamic
8963 arrays properly, treat them as arrays with unspecified
8966 FIXME: jimb/2003-09-22: GDB does not really know
8967 how to handle arrays of unspecified length
8968 either; we just represent them as zero-length
8969 arrays. Choose an appropriate upper bound given
8970 the lower bound we've computed above. */
8974 high
= dwarf2_get_attr_constant_value (attr
, 1);
8978 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8981 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8982 high
= low
+ count
- 1;
8986 /* Unspecified array length. */
8991 /* Dwarf-2 specifications explicitly allows to create subrange types
8992 without specifying a base type.
8993 In that case, the base type must be set to the type of
8994 the lower bound, upper bound or count, in that order, if any of these
8995 three attributes references an object that has a type.
8996 If no base type is found, the Dwarf-2 specifications say that
8997 a signed integer type of size equal to the size of an address should
8999 For the following C code: `extern char gdb_int [];'
9000 GCC produces an empty range DIE.
9001 FIXME: muller/2010-05-28: Possible references to object for low bound,
9002 high bound or count are not yet handled by this code. */
9003 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
9005 struct objfile
*objfile
= cu
->objfile
;
9006 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9007 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
9008 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
9010 /* Test "int", "long int", and "long long int" objfile types,
9011 and select the first one having a size above or equal to the
9012 architecture address size. */
9013 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9014 base_type
= int_type
;
9017 int_type
= objfile_type (objfile
)->builtin_long
;
9018 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9019 base_type
= int_type
;
9022 int_type
= objfile_type (objfile
)->builtin_long_long
;
9023 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9024 base_type
= int_type
;
9030 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
9031 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
9032 low
|= negative_mask
;
9033 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
9034 high
|= negative_mask
;
9036 range_type
= create_range_type (NULL
, base_type
, low
, high
);
9038 /* Mark arrays with dynamic length at least as an array of unspecified
9039 length. GDB could check the boundary but before it gets implemented at
9040 least allow accessing the array elements. */
9041 if (attr
&& attr_form_is_block (attr
))
9042 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
9044 /* Ada expects an empty array on no boundary attributes. */
9045 if (attr
== NULL
&& cu
->language
!= language_ada
)
9046 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
9048 name
= dwarf2_name (die
, cu
);
9050 TYPE_NAME (range_type
) = name
;
9052 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9054 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
9056 set_die_type (die
, range_type
, cu
);
9058 /* set_die_type should be already done. */
9059 set_descriptive_type (range_type
, die
, cu
);
9064 static struct type
*
9065 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9069 /* For now, we only support the C meaning of an unspecified type: void. */
9071 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
9072 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
9074 return set_die_type (die
, type
, cu
);
9077 /* Trivial hash function for die_info: the hash value of a DIE
9078 is its offset in .debug_info for this objfile. */
9081 die_hash (const void *item
)
9083 const struct die_info
*die
= item
;
9088 /* Trivial comparison function for die_info structures: two DIEs
9089 are equal if they have the same offset. */
9092 die_eq (const void *item_lhs
, const void *item_rhs
)
9094 const struct die_info
*die_lhs
= item_lhs
;
9095 const struct die_info
*die_rhs
= item_rhs
;
9097 return die_lhs
->offset
== die_rhs
->offset
;
9100 /* Read a whole compilation unit into a linked list of dies. */
9102 static struct die_info
*
9103 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9105 struct die_reader_specs reader_specs
;
9106 int read_abbrevs
= 0;
9107 struct cleanup
*back_to
= NULL
;
9108 struct die_info
*die
;
9110 if (cu
->dwarf2_abbrevs
== NULL
)
9112 dwarf2_read_abbrevs (cu
);
9113 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
9117 gdb_assert (cu
->die_hash
== NULL
);
9119 = htab_create_alloc_ex (cu
->header
.length
/ 12,
9123 &cu
->comp_unit_obstack
,
9124 hashtab_obstack_allocate
,
9125 dummy_obstack_deallocate
);
9127 init_cu_die_reader (&reader_specs
, cu
);
9129 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
9132 do_cleanups (back_to
);
9137 /* Main entry point for reading a DIE and all children.
9138 Read the DIE and dump it if requested. */
9140 static struct die_info
*
9141 read_die_and_children (const struct die_reader_specs
*reader
,
9143 gdb_byte
**new_info_ptr
,
9144 struct die_info
*parent
)
9146 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
9147 new_info_ptr
, parent
);
9149 if (dwarf2_die_debug
)
9151 fprintf_unfiltered (gdb_stdlog
,
9152 "\nRead die from %s of %s:\n",
9153 (reader
->cu
->per_cu
->debug_types_section
9156 reader
->abfd
->filename
);
9157 dump_die (result
, dwarf2_die_debug
);
9163 /* Read a single die and all its descendents. Set the die's sibling
9164 field to NULL; set other fields in the die correctly, and set all
9165 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
9166 location of the info_ptr after reading all of those dies. PARENT
9167 is the parent of the die in question. */
9169 static struct die_info
*
9170 read_die_and_children_1 (const struct die_reader_specs
*reader
,
9172 gdb_byte
**new_info_ptr
,
9173 struct die_info
*parent
)
9175 struct die_info
*die
;
9179 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
9182 *new_info_ptr
= cur_ptr
;
9185 store_in_ref_table (die
, reader
->cu
);
9188 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
9192 *new_info_ptr
= cur_ptr
;
9195 die
->sibling
= NULL
;
9196 die
->parent
= parent
;
9200 /* Read a die, all of its descendents, and all of its siblings; set
9201 all of the fields of all of the dies correctly. Arguments are as
9202 in read_die_and_children. */
9204 static struct die_info
*
9205 read_die_and_siblings (const struct die_reader_specs
*reader
,
9207 gdb_byte
**new_info_ptr
,
9208 struct die_info
*parent
)
9210 struct die_info
*first_die
, *last_sibling
;
9214 first_die
= last_sibling
= NULL
;
9218 struct die_info
*die
9219 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
9223 *new_info_ptr
= cur_ptr
;
9230 last_sibling
->sibling
= die
;
9236 /* Read the die from the .debug_info section buffer. Set DIEP to
9237 point to a newly allocated die with its information, except for its
9238 child, sibling, and parent fields. Set HAS_CHILDREN to tell
9239 whether the die has children or not. */
9242 read_full_die (const struct die_reader_specs
*reader
,
9243 struct die_info
**diep
, gdb_byte
*info_ptr
,
9246 unsigned int abbrev_number
, bytes_read
, i
, offset
;
9247 struct abbrev_info
*abbrev
;
9248 struct die_info
*die
;
9249 struct dwarf2_cu
*cu
= reader
->cu
;
9250 bfd
*abfd
= reader
->abfd
;
9252 offset
= info_ptr
- reader
->buffer
;
9253 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9254 info_ptr
+= bytes_read
;
9262 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
9264 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
9266 bfd_get_filename (abfd
));
9268 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
9269 die
->offset
= offset
;
9270 die
->tag
= abbrev
->tag
;
9271 die
->abbrev
= abbrev_number
;
9273 die
->num_attrs
= abbrev
->num_attrs
;
9275 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9276 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
9277 abfd
, info_ptr
, cu
);
9280 *has_children
= abbrev
->has_children
;
9284 /* In DWARF version 2, the description of the debugging information is
9285 stored in a separate .debug_abbrev section. Before we read any
9286 dies from a section we read in all abbreviations and install them
9287 in a hash table. This function also sets flags in CU describing
9288 the data found in the abbrev table. */
9291 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
)
9293 bfd
*abfd
= cu
->objfile
->obfd
;
9294 struct comp_unit_head
*cu_header
= &cu
->header
;
9295 gdb_byte
*abbrev_ptr
;
9296 struct abbrev_info
*cur_abbrev
;
9297 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
9298 unsigned int abbrev_form
, hash_number
;
9299 struct attr_abbrev
*cur_attrs
;
9300 unsigned int allocated_attrs
;
9302 /* Initialize dwarf2 abbrevs. */
9303 obstack_init (&cu
->abbrev_obstack
);
9304 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
9306 * sizeof (struct abbrev_info
*)));
9307 memset (cu
->dwarf2_abbrevs
, 0,
9308 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
9310 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
9311 &dwarf2_per_objfile
->abbrev
);
9312 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
9313 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9314 abbrev_ptr
+= bytes_read
;
9316 allocated_attrs
= ATTR_ALLOC_CHUNK
;
9317 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
9319 /* Loop until we reach an abbrev number of 0. */
9320 while (abbrev_number
)
9322 cur_abbrev
= dwarf_alloc_abbrev (cu
);
9324 /* read in abbrev header */
9325 cur_abbrev
->number
= abbrev_number
;
9326 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9327 abbrev_ptr
+= bytes_read
;
9328 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
9331 /* now read in declarations */
9332 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9333 abbrev_ptr
+= bytes_read
;
9334 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9335 abbrev_ptr
+= bytes_read
;
9338 if (cur_abbrev
->num_attrs
== allocated_attrs
)
9340 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
9342 = xrealloc (cur_attrs
, (allocated_attrs
9343 * sizeof (struct attr_abbrev
)));
9346 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
9347 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
9348 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9349 abbrev_ptr
+= bytes_read
;
9350 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9351 abbrev_ptr
+= bytes_read
;
9354 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
9355 (cur_abbrev
->num_attrs
9356 * sizeof (struct attr_abbrev
)));
9357 memcpy (cur_abbrev
->attrs
, cur_attrs
,
9358 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
9360 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
9361 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
9362 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
9364 /* Get next abbreviation.
9365 Under Irix6 the abbreviations for a compilation unit are not
9366 always properly terminated with an abbrev number of 0.
9367 Exit loop if we encounter an abbreviation which we have
9368 already read (which means we are about to read the abbreviations
9369 for the next compile unit) or if the end of the abbreviation
9370 table is reached. */
9371 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
9372 >= dwarf2_per_objfile
->abbrev
.size
)
9374 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9375 abbrev_ptr
+= bytes_read
;
9376 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
9383 /* Release the memory used by the abbrev table for a compilation unit. */
9386 dwarf2_free_abbrev_table (void *ptr_to_cu
)
9388 struct dwarf2_cu
*cu
= ptr_to_cu
;
9390 obstack_free (&cu
->abbrev_obstack
, NULL
);
9391 cu
->dwarf2_abbrevs
= NULL
;
9394 /* Lookup an abbrev_info structure in the abbrev hash table. */
9396 static struct abbrev_info
*
9397 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
9399 unsigned int hash_number
;
9400 struct abbrev_info
*abbrev
;
9402 hash_number
= number
% ABBREV_HASH_SIZE
;
9403 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
9407 if (abbrev
->number
== number
)
9410 abbrev
= abbrev
->next
;
9415 /* Returns nonzero if TAG represents a type that we might generate a partial
9419 is_type_tag_for_partial (int tag
)
9424 /* Some types that would be reasonable to generate partial symbols for,
9425 that we don't at present. */
9426 case DW_TAG_array_type
:
9427 case DW_TAG_file_type
:
9428 case DW_TAG_ptr_to_member_type
:
9429 case DW_TAG_set_type
:
9430 case DW_TAG_string_type
:
9431 case DW_TAG_subroutine_type
:
9433 case DW_TAG_base_type
:
9434 case DW_TAG_class_type
:
9435 case DW_TAG_interface_type
:
9436 case DW_TAG_enumeration_type
:
9437 case DW_TAG_structure_type
:
9438 case DW_TAG_subrange_type
:
9439 case DW_TAG_typedef
:
9440 case DW_TAG_union_type
:
9447 /* Load all DIEs that are interesting for partial symbols into memory. */
9449 static struct partial_die_info
*
9450 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
9451 int building_psymtab
, struct dwarf2_cu
*cu
)
9453 struct objfile
*objfile
= cu
->objfile
;
9454 struct partial_die_info
*part_die
;
9455 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
9456 struct abbrev_info
*abbrev
;
9457 unsigned int bytes_read
;
9458 unsigned int load_all
= 0;
9460 int nesting_level
= 1;
9465 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
9469 = htab_create_alloc_ex (cu
->header
.length
/ 12,
9473 &cu
->comp_unit_obstack
,
9474 hashtab_obstack_allocate
,
9475 dummy_obstack_deallocate
);
9477 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
9478 sizeof (struct partial_die_info
));
9482 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
9484 /* A NULL abbrev means the end of a series of children. */
9487 if (--nesting_level
== 0)
9489 /* PART_DIE was probably the last thing allocated on the
9490 comp_unit_obstack, so we could call obstack_free
9491 here. We don't do that because the waste is small,
9492 and will be cleaned up when we're done with this
9493 compilation unit. This way, we're also more robust
9494 against other users of the comp_unit_obstack. */
9497 info_ptr
+= bytes_read
;
9498 last_die
= parent_die
;
9499 parent_die
= parent_die
->die_parent
;
9503 /* Check for template arguments. We never save these; if
9504 they're seen, we just mark the parent, and go on our way. */
9505 if (parent_die
!= NULL
9506 && cu
->language
== language_cplus
9507 && (abbrev
->tag
== DW_TAG_template_type_param
9508 || abbrev
->tag
== DW_TAG_template_value_param
))
9510 parent_die
->has_template_arguments
= 1;
9514 /* We don't need a partial DIE for the template argument. */
9515 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
9521 /* We only recurse into subprograms looking for template arguments.
9522 Skip their other children. */
9524 && cu
->language
== language_cplus
9525 && parent_die
!= NULL
9526 && parent_die
->tag
== DW_TAG_subprogram
)
9528 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
9532 /* Check whether this DIE is interesting enough to save. Normally
9533 we would not be interested in members here, but there may be
9534 later variables referencing them via DW_AT_specification (for
9537 && !is_type_tag_for_partial (abbrev
->tag
)
9538 && abbrev
->tag
!= DW_TAG_constant
9539 && abbrev
->tag
!= DW_TAG_enumerator
9540 && abbrev
->tag
!= DW_TAG_subprogram
9541 && abbrev
->tag
!= DW_TAG_lexical_block
9542 && abbrev
->tag
!= DW_TAG_variable
9543 && abbrev
->tag
!= DW_TAG_namespace
9544 && abbrev
->tag
!= DW_TAG_module
9545 && abbrev
->tag
!= DW_TAG_member
)
9547 /* Otherwise we skip to the next sibling, if any. */
9548 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
9552 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
9553 buffer
, info_ptr
, cu
);
9555 /* This two-pass algorithm for processing partial symbols has a
9556 high cost in cache pressure. Thus, handle some simple cases
9557 here which cover the majority of C partial symbols. DIEs
9558 which neither have specification tags in them, nor could have
9559 specification tags elsewhere pointing at them, can simply be
9560 processed and discarded.
9562 This segment is also optional; scan_partial_symbols and
9563 add_partial_symbol will handle these DIEs if we chain
9564 them in normally. When compilers which do not emit large
9565 quantities of duplicate debug information are more common,
9566 this code can probably be removed. */
9568 /* Any complete simple types at the top level (pretty much all
9569 of them, for a language without namespaces), can be processed
9571 if (parent_die
== NULL
9572 && part_die
->has_specification
== 0
9573 && part_die
->is_declaration
== 0
9574 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
9575 || part_die
->tag
== DW_TAG_base_type
9576 || part_die
->tag
== DW_TAG_subrange_type
))
9578 if (building_psymtab
&& part_die
->name
!= NULL
)
9579 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
9580 VAR_DOMAIN
, LOC_TYPEDEF
,
9581 &objfile
->static_psymbols
,
9582 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
9583 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
9587 /* The exception for DW_TAG_typedef with has_children above is
9588 a workaround of GCC PR debug/47510. In the case of this complaint
9589 type_name_no_tag_or_error will error on such types later.
9591 GDB skipped children of DW_TAG_typedef by the shortcut above and then
9592 it could not find the child DIEs referenced later, this is checked
9593 above. In correct DWARF DW_TAG_typedef should have no children. */
9595 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
9596 complaint (&symfile_complaints
,
9597 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
9598 "- DIE at 0x%x [in module %s]"),
9599 part_die
->offset
, objfile
->name
);
9601 /* If we're at the second level, and we're an enumerator, and
9602 our parent has no specification (meaning possibly lives in a
9603 namespace elsewhere), then we can add the partial symbol now
9604 instead of queueing it. */
9605 if (part_die
->tag
== DW_TAG_enumerator
9606 && parent_die
!= NULL
9607 && parent_die
->die_parent
== NULL
9608 && parent_die
->tag
== DW_TAG_enumeration_type
9609 && parent_die
->has_specification
== 0)
9611 if (part_die
->name
== NULL
)
9612 complaint (&symfile_complaints
,
9613 _("malformed enumerator DIE ignored"));
9614 else if (building_psymtab
)
9615 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
9616 VAR_DOMAIN
, LOC_CONST
,
9617 (cu
->language
== language_cplus
9618 || cu
->language
== language_java
)
9619 ? &objfile
->global_psymbols
9620 : &objfile
->static_psymbols
,
9621 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
9623 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
9627 /* We'll save this DIE so link it in. */
9628 part_die
->die_parent
= parent_die
;
9629 part_die
->die_sibling
= NULL
;
9630 part_die
->die_child
= NULL
;
9632 if (last_die
&& last_die
== parent_die
)
9633 last_die
->die_child
= part_die
;
9635 last_die
->die_sibling
= part_die
;
9637 last_die
= part_die
;
9639 if (first_die
== NULL
)
9640 first_die
= part_die
;
9642 /* Maybe add the DIE to the hash table. Not all DIEs that we
9643 find interesting need to be in the hash table, because we
9644 also have the parent/sibling/child chains; only those that we
9645 might refer to by offset later during partial symbol reading.
9647 For now this means things that might have be the target of a
9648 DW_AT_specification, DW_AT_abstract_origin, or
9649 DW_AT_extension. DW_AT_extension will refer only to
9650 namespaces; DW_AT_abstract_origin refers to functions (and
9651 many things under the function DIE, but we do not recurse
9652 into function DIEs during partial symbol reading) and
9653 possibly variables as well; DW_AT_specification refers to
9654 declarations. Declarations ought to have the DW_AT_declaration
9655 flag. It happens that GCC forgets to put it in sometimes, but
9656 only for functions, not for types.
9658 Adding more things than necessary to the hash table is harmless
9659 except for the performance cost. Adding too few will result in
9660 wasted time in find_partial_die, when we reread the compilation
9661 unit with load_all_dies set. */
9664 || abbrev
->tag
== DW_TAG_constant
9665 || abbrev
->tag
== DW_TAG_subprogram
9666 || abbrev
->tag
== DW_TAG_variable
9667 || abbrev
->tag
== DW_TAG_namespace
9668 || part_die
->is_declaration
)
9672 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
9673 part_die
->offset
, INSERT
);
9677 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
9678 sizeof (struct partial_die_info
));
9680 /* For some DIEs we want to follow their children (if any). For C
9681 we have no reason to follow the children of structures; for other
9682 languages we have to, so that we can get at method physnames
9683 to infer fully qualified class names, for DW_AT_specification,
9684 and for C++ template arguments. For C++, we also look one level
9685 inside functions to find template arguments (if the name of the
9686 function does not already contain the template arguments).
9688 For Ada, we need to scan the children of subprograms and lexical
9689 blocks as well because Ada allows the definition of nested
9690 entities that could be interesting for the debugger, such as
9691 nested subprograms for instance. */
9692 if (last_die
->has_children
9694 || last_die
->tag
== DW_TAG_namespace
9695 || last_die
->tag
== DW_TAG_module
9696 || last_die
->tag
== DW_TAG_enumeration_type
9697 || (cu
->language
== language_cplus
9698 && last_die
->tag
== DW_TAG_subprogram
9699 && (last_die
->name
== NULL
9700 || strchr (last_die
->name
, '<') == NULL
))
9701 || (cu
->language
!= language_c
9702 && (last_die
->tag
== DW_TAG_class_type
9703 || last_die
->tag
== DW_TAG_interface_type
9704 || last_die
->tag
== DW_TAG_structure_type
9705 || last_die
->tag
== DW_TAG_union_type
))
9706 || (cu
->language
== language_ada
9707 && (last_die
->tag
== DW_TAG_subprogram
9708 || last_die
->tag
== DW_TAG_lexical_block
))))
9711 parent_die
= last_die
;
9715 /* Otherwise we skip to the next sibling, if any. */
9716 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
9718 /* Back to the top, do it again. */
9722 /* Read a minimal amount of information into the minimal die structure. */
9725 read_partial_die (struct partial_die_info
*part_die
,
9726 struct abbrev_info
*abbrev
,
9727 unsigned int abbrev_len
, bfd
*abfd
,
9728 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
9729 struct dwarf2_cu
*cu
)
9731 struct objfile
*objfile
= cu
->objfile
;
9733 struct attribute attr
;
9734 int has_low_pc_attr
= 0;
9735 int has_high_pc_attr
= 0;
9737 memset (part_die
, 0, sizeof (struct partial_die_info
));
9739 part_die
->offset
= info_ptr
- buffer
;
9741 info_ptr
+= abbrev_len
;
9746 part_die
->tag
= abbrev
->tag
;
9747 part_die
->has_children
= abbrev
->has_children
;
9749 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9751 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
9753 /* Store the data if it is of an attribute we want to keep in a
9754 partial symbol table. */
9758 switch (part_die
->tag
)
9760 case DW_TAG_compile_unit
:
9761 case DW_TAG_type_unit
:
9762 /* Compilation units have a DW_AT_name that is a filename, not
9763 a source language identifier. */
9764 case DW_TAG_enumeration_type
:
9765 case DW_TAG_enumerator
:
9766 /* These tags always have simple identifiers already; no need
9767 to canonicalize them. */
9768 part_die
->name
= DW_STRING (&attr
);
9772 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
9773 &objfile
->objfile_obstack
);
9777 case DW_AT_linkage_name
:
9778 case DW_AT_MIPS_linkage_name
:
9779 /* Note that both forms of linkage name might appear. We
9780 assume they will be the same, and we only store the last
9782 if (cu
->language
== language_ada
)
9783 part_die
->name
= DW_STRING (&attr
);
9784 part_die
->linkage_name
= DW_STRING (&attr
);
9787 has_low_pc_attr
= 1;
9788 part_die
->lowpc
= DW_ADDR (&attr
);
9791 has_high_pc_attr
= 1;
9792 part_die
->highpc
= DW_ADDR (&attr
);
9794 case DW_AT_location
:
9795 /* Support the .debug_loc offsets. */
9796 if (attr_form_is_block (&attr
))
9798 part_die
->locdesc
= DW_BLOCK (&attr
);
9800 else if (attr_form_is_section_offset (&attr
))
9802 dwarf2_complex_location_expr_complaint ();
9806 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9807 "partial symbol information");
9810 case DW_AT_external
:
9811 part_die
->is_external
= DW_UNSND (&attr
);
9813 case DW_AT_declaration
:
9814 part_die
->is_declaration
= DW_UNSND (&attr
);
9817 part_die
->has_type
= 1;
9819 case DW_AT_abstract_origin
:
9820 case DW_AT_specification
:
9821 case DW_AT_extension
:
9822 part_die
->has_specification
= 1;
9823 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
9826 /* Ignore absolute siblings, they might point outside of
9827 the current compile unit. */
9828 if (attr
.form
== DW_FORM_ref_addr
)
9829 complaint (&symfile_complaints
,
9830 _("ignoring absolute DW_AT_sibling"));
9832 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
9834 case DW_AT_byte_size
:
9835 part_die
->has_byte_size
= 1;
9837 case DW_AT_calling_convention
:
9838 /* DWARF doesn't provide a way to identify a program's source-level
9839 entry point. DW_AT_calling_convention attributes are only meant
9840 to describe functions' calling conventions.
9842 However, because it's a necessary piece of information in
9843 Fortran, and because DW_CC_program is the only piece of debugging
9844 information whose definition refers to a 'main program' at all,
9845 several compilers have begun marking Fortran main programs with
9846 DW_CC_program --- even when those functions use the standard
9847 calling conventions.
9849 So until DWARF specifies a way to provide this information and
9850 compilers pick up the new representation, we'll support this
9852 if (DW_UNSND (&attr
) == DW_CC_program
9853 && cu
->language
== language_fortran
)
9855 set_main_name (part_die
->name
);
9857 /* As this DIE has a static linkage the name would be difficult
9858 to look up later. */
9859 language_of_main
= language_fortran
;
9867 if (has_low_pc_attr
&& has_high_pc_attr
)
9869 /* When using the GNU linker, .gnu.linkonce. sections are used to
9870 eliminate duplicate copies of functions and vtables and such.
9871 The linker will arbitrarily choose one and discard the others.
9872 The AT_*_pc values for such functions refer to local labels in
9873 these sections. If the section from that file was discarded, the
9874 labels are not in the output, so the relocs get a value of 0.
9875 If this is a discarded function, mark the pc bounds as invalid,
9876 so that GDB will ignore it. */
9877 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9879 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9881 complaint (&symfile_complaints
,
9882 _("DW_AT_low_pc %s is zero "
9883 "for DIE at 0x%x [in module %s]"),
9884 paddress (gdbarch
, part_die
->lowpc
),
9885 part_die
->offset
, objfile
->name
);
9887 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
9888 else if (part_die
->lowpc
>= part_die
->highpc
)
9890 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9892 complaint (&symfile_complaints
,
9893 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
9894 "for DIE at 0x%x [in module %s]"),
9895 paddress (gdbarch
, part_die
->lowpc
),
9896 paddress (gdbarch
, part_die
->highpc
),
9897 part_die
->offset
, objfile
->name
);
9900 part_die
->has_pc_info
= 1;
9906 /* Find a cached partial DIE at OFFSET in CU. */
9908 static struct partial_die_info
*
9909 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
9911 struct partial_die_info
*lookup_die
= NULL
;
9912 struct partial_die_info part_die
;
9914 part_die
.offset
= offset
;
9915 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
9920 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9921 except in the case of .debug_types DIEs which do not reference
9922 outside their CU (they do however referencing other types via
9923 DW_FORM_ref_sig8). */
9925 static struct partial_die_info
*
9926 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
9928 struct objfile
*objfile
= cu
->objfile
;
9929 struct dwarf2_per_cu_data
*per_cu
= NULL
;
9930 struct partial_die_info
*pd
= NULL
;
9932 if (cu
->per_cu
->debug_types_section
)
9934 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9940 if (offset_in_cu_p (&cu
->header
, offset
))
9942 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9947 per_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9949 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
9950 load_partial_comp_unit (per_cu
);
9952 per_cu
->cu
->last_used
= 0;
9953 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9955 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
9957 struct cleanup
*back_to
;
9958 struct partial_die_info comp_unit_die
;
9959 struct abbrev_info
*abbrev
;
9960 unsigned int bytes_read
;
9963 per_cu
->load_all_dies
= 1;
9965 /* Re-read the DIEs. */
9966 back_to
= make_cleanup (null_cleanup
, 0);
9967 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
9969 dwarf2_read_abbrevs (per_cu
->cu
);
9970 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
9972 info_ptr
= (dwarf2_per_objfile
->info
.buffer
9973 + per_cu
->cu
->header
.offset
9974 + per_cu
->cu
->header
.first_die_offset
);
9975 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
9976 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
9978 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9980 if (comp_unit_die
.has_children
)
9981 load_partial_dies (objfile
->obfd
,
9982 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9984 do_cleanups (back_to
);
9986 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9992 internal_error (__FILE__
, __LINE__
,
9993 _("could not find partial DIE 0x%x "
9994 "in cache [from module %s]\n"),
9995 offset
, bfd_get_filename (objfile
->obfd
));
9999 /* See if we can figure out if the class lives in a namespace. We do
10000 this by looking for a member function; its demangled name will
10001 contain namespace info, if there is any. */
10004 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
10005 struct dwarf2_cu
*cu
)
10007 /* NOTE: carlton/2003-10-07: Getting the info this way changes
10008 what template types look like, because the demangler
10009 frequently doesn't give the same name as the debug info. We
10010 could fix this by only using the demangled name to get the
10011 prefix (but see comment in read_structure_type). */
10013 struct partial_die_info
*real_pdi
;
10014 struct partial_die_info
*child_pdi
;
10016 /* If this DIE (this DIE's specification, if any) has a parent, then
10017 we should not do this. We'll prepend the parent's fully qualified
10018 name when we create the partial symbol. */
10020 real_pdi
= struct_pdi
;
10021 while (real_pdi
->has_specification
)
10022 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
10024 if (real_pdi
->die_parent
!= NULL
)
10027 for (child_pdi
= struct_pdi
->die_child
;
10029 child_pdi
= child_pdi
->die_sibling
)
10031 if (child_pdi
->tag
== DW_TAG_subprogram
10032 && child_pdi
->linkage_name
!= NULL
)
10034 char *actual_class_name
10035 = language_class_name_from_physname (cu
->language_defn
,
10036 child_pdi
->linkage_name
);
10037 if (actual_class_name
!= NULL
)
10040 = obsavestring (actual_class_name
,
10041 strlen (actual_class_name
),
10042 &cu
->objfile
->objfile_obstack
);
10043 xfree (actual_class_name
);
10050 /* Adjust PART_DIE before generating a symbol for it. This function
10051 may set the is_external flag or change the DIE's name. */
10054 fixup_partial_die (struct partial_die_info
*part_die
,
10055 struct dwarf2_cu
*cu
)
10057 /* Once we've fixed up a die, there's no point in doing so again.
10058 This also avoids a memory leak if we were to call
10059 guess_partial_die_structure_name multiple times. */
10060 if (part_die
->fixup_called
)
10063 /* If we found a reference attribute and the DIE has no name, try
10064 to find a name in the referred to DIE. */
10066 if (part_die
->name
== NULL
&& part_die
->has_specification
)
10068 struct partial_die_info
*spec_die
;
10070 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
10072 fixup_partial_die (spec_die
, cu
);
10074 if (spec_die
->name
)
10076 part_die
->name
= spec_die
->name
;
10078 /* Copy DW_AT_external attribute if it is set. */
10079 if (spec_die
->is_external
)
10080 part_die
->is_external
= spec_die
->is_external
;
10084 /* Set default names for some unnamed DIEs. */
10086 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
10087 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
10089 /* If there is no parent die to provide a namespace, and there are
10090 children, see if we can determine the namespace from their linkage
10092 if (cu
->language
== language_cplus
10093 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
10094 && part_die
->die_parent
== NULL
10095 && part_die
->has_children
10096 && (part_die
->tag
== DW_TAG_class_type
10097 || part_die
->tag
== DW_TAG_structure_type
10098 || part_die
->tag
== DW_TAG_union_type
))
10099 guess_partial_die_structure_name (part_die
, cu
);
10101 /* GCC might emit a nameless struct or union that has a linkage
10102 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
10103 if (part_die
->name
== NULL
10104 && (part_die
->tag
== DW_TAG_class_type
10105 || part_die
->tag
== DW_TAG_interface_type
10106 || part_die
->tag
== DW_TAG_structure_type
10107 || part_die
->tag
== DW_TAG_union_type
)
10108 && part_die
->linkage_name
!= NULL
)
10112 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
10117 /* Strip any leading namespaces/classes, keep only the base name.
10118 DW_AT_name for named DIEs does not contain the prefixes. */
10119 base
= strrchr (demangled
, ':');
10120 if (base
&& base
> demangled
&& base
[-1] == ':')
10125 part_die
->name
= obsavestring (base
, strlen (base
),
10126 &cu
->objfile
->objfile_obstack
);
10131 part_die
->fixup_called
= 1;
10134 /* Read an attribute value described by an attribute form. */
10137 read_attribute_value (struct attribute
*attr
, unsigned form
,
10138 bfd
*abfd
, gdb_byte
*info_ptr
,
10139 struct dwarf2_cu
*cu
)
10141 struct comp_unit_head
*cu_header
= &cu
->header
;
10142 unsigned int bytes_read
;
10143 struct dwarf_block
*blk
;
10148 case DW_FORM_ref_addr
:
10149 if (cu
->header
.version
== 2)
10150 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
10152 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
,
10153 &cu
->header
, &bytes_read
);
10154 info_ptr
+= bytes_read
;
10157 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
10158 info_ptr
+= bytes_read
;
10160 case DW_FORM_block2
:
10161 blk
= dwarf_alloc_block (cu
);
10162 blk
->size
= read_2_bytes (abfd
, info_ptr
);
10164 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10165 info_ptr
+= blk
->size
;
10166 DW_BLOCK (attr
) = blk
;
10168 case DW_FORM_block4
:
10169 blk
= dwarf_alloc_block (cu
);
10170 blk
->size
= read_4_bytes (abfd
, info_ptr
);
10172 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10173 info_ptr
+= blk
->size
;
10174 DW_BLOCK (attr
) = blk
;
10176 case DW_FORM_data2
:
10177 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
10180 case DW_FORM_data4
:
10181 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
10184 case DW_FORM_data8
:
10185 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
10188 case DW_FORM_sec_offset
:
10189 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
10190 info_ptr
+= bytes_read
;
10192 case DW_FORM_string
:
10193 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
10194 DW_STRING_IS_CANONICAL (attr
) = 0;
10195 info_ptr
+= bytes_read
;
10198 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
10200 DW_STRING_IS_CANONICAL (attr
) = 0;
10201 info_ptr
+= bytes_read
;
10203 case DW_FORM_exprloc
:
10204 case DW_FORM_block
:
10205 blk
= dwarf_alloc_block (cu
);
10206 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10207 info_ptr
+= bytes_read
;
10208 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10209 info_ptr
+= blk
->size
;
10210 DW_BLOCK (attr
) = blk
;
10212 case DW_FORM_block1
:
10213 blk
= dwarf_alloc_block (cu
);
10214 blk
->size
= read_1_byte (abfd
, info_ptr
);
10216 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10217 info_ptr
+= blk
->size
;
10218 DW_BLOCK (attr
) = blk
;
10220 case DW_FORM_data1
:
10221 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
10225 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
10228 case DW_FORM_flag_present
:
10229 DW_UNSND (attr
) = 1;
10231 case DW_FORM_sdata
:
10232 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
10233 info_ptr
+= bytes_read
;
10235 case DW_FORM_udata
:
10236 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10237 info_ptr
+= bytes_read
;
10240 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
10244 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
10248 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
10252 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
10255 case DW_FORM_ref_sig8
:
10256 /* Convert the signature to something we can record in DW_UNSND
10258 NOTE: This is NULL if the type wasn't found. */
10259 DW_SIGNATURED_TYPE (attr
) =
10260 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
10263 case DW_FORM_ref_udata
:
10264 DW_ADDR (attr
) = (cu
->header
.offset
10265 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
10266 info_ptr
+= bytes_read
;
10268 case DW_FORM_indirect
:
10269 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10270 info_ptr
+= bytes_read
;
10271 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
10274 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
10275 dwarf_form_name (form
),
10276 bfd_get_filename (abfd
));
10279 /* We have seen instances where the compiler tried to emit a byte
10280 size attribute of -1 which ended up being encoded as an unsigned
10281 0xffffffff. Although 0xffffffff is technically a valid size value,
10282 an object of this size seems pretty unlikely so we can relatively
10283 safely treat these cases as if the size attribute was invalid and
10284 treat them as zero by default. */
10285 if (attr
->name
== DW_AT_byte_size
10286 && form
== DW_FORM_data4
10287 && DW_UNSND (attr
) >= 0xffffffff)
10290 (&symfile_complaints
,
10291 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
10292 hex_string (DW_UNSND (attr
)));
10293 DW_UNSND (attr
) = 0;
10299 /* Read an attribute described by an abbreviated attribute. */
10302 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
10303 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
10305 attr
->name
= abbrev
->name
;
10306 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
10309 /* Read dwarf information from a buffer. */
10311 static unsigned int
10312 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
10314 return bfd_get_8 (abfd
, buf
);
10318 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
10320 return bfd_get_signed_8 (abfd
, buf
);
10323 static unsigned int
10324 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
10326 return bfd_get_16 (abfd
, buf
);
10330 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
10332 return bfd_get_signed_16 (abfd
, buf
);
10335 static unsigned int
10336 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
10338 return bfd_get_32 (abfd
, buf
);
10342 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
10344 return bfd_get_signed_32 (abfd
, buf
);
10348 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
10350 return bfd_get_64 (abfd
, buf
);
10354 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
10355 unsigned int *bytes_read
)
10357 struct comp_unit_head
*cu_header
= &cu
->header
;
10358 CORE_ADDR retval
= 0;
10360 if (cu_header
->signed_addr_p
)
10362 switch (cu_header
->addr_size
)
10365 retval
= bfd_get_signed_16 (abfd
, buf
);
10368 retval
= bfd_get_signed_32 (abfd
, buf
);
10371 retval
= bfd_get_signed_64 (abfd
, buf
);
10374 internal_error (__FILE__
, __LINE__
,
10375 _("read_address: bad switch, signed [in module %s]"),
10376 bfd_get_filename (abfd
));
10381 switch (cu_header
->addr_size
)
10384 retval
= bfd_get_16 (abfd
, buf
);
10387 retval
= bfd_get_32 (abfd
, buf
);
10390 retval
= bfd_get_64 (abfd
, buf
);
10393 internal_error (__FILE__
, __LINE__
,
10394 _("read_address: bad switch, "
10395 "unsigned [in module %s]"),
10396 bfd_get_filename (abfd
));
10400 *bytes_read
= cu_header
->addr_size
;
10404 /* Read the initial length from a section. The (draft) DWARF 3
10405 specification allows the initial length to take up either 4 bytes
10406 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
10407 bytes describe the length and all offsets will be 8 bytes in length
10410 An older, non-standard 64-bit format is also handled by this
10411 function. The older format in question stores the initial length
10412 as an 8-byte quantity without an escape value. Lengths greater
10413 than 2^32 aren't very common which means that the initial 4 bytes
10414 is almost always zero. Since a length value of zero doesn't make
10415 sense for the 32-bit format, this initial zero can be considered to
10416 be an escape value which indicates the presence of the older 64-bit
10417 format. As written, the code can't detect (old format) lengths
10418 greater than 4GB. If it becomes necessary to handle lengths
10419 somewhat larger than 4GB, we could allow other small values (such
10420 as the non-sensical values of 1, 2, and 3) to also be used as
10421 escape values indicating the presence of the old format.
10423 The value returned via bytes_read should be used to increment the
10424 relevant pointer after calling read_initial_length().
10426 [ Note: read_initial_length() and read_offset() are based on the
10427 document entitled "DWARF Debugging Information Format", revision
10428 3, draft 8, dated November 19, 2001. This document was obtained
10431 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
10433 This document is only a draft and is subject to change. (So beware.)
10435 Details regarding the older, non-standard 64-bit format were
10436 determined empirically by examining 64-bit ELF files produced by
10437 the SGI toolchain on an IRIX 6.5 machine.
10439 - Kevin, July 16, 2002
10443 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
10445 LONGEST length
= bfd_get_32 (abfd
, buf
);
10447 if (length
== 0xffffffff)
10449 length
= bfd_get_64 (abfd
, buf
+ 4);
10452 else if (length
== 0)
10454 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
10455 length
= bfd_get_64 (abfd
, buf
);
10466 /* Cover function for read_initial_length.
10467 Returns the length of the object at BUF, and stores the size of the
10468 initial length in *BYTES_READ and stores the size that offsets will be in
10470 If the initial length size is not equivalent to that specified in
10471 CU_HEADER then issue a complaint.
10472 This is useful when reading non-comp-unit headers. */
10475 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
10476 const struct comp_unit_head
*cu_header
,
10477 unsigned int *bytes_read
,
10478 unsigned int *offset_size
)
10480 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
10482 gdb_assert (cu_header
->initial_length_size
== 4
10483 || cu_header
->initial_length_size
== 8
10484 || cu_header
->initial_length_size
== 12);
10486 if (cu_header
->initial_length_size
!= *bytes_read
)
10487 complaint (&symfile_complaints
,
10488 _("intermixed 32-bit and 64-bit DWARF sections"));
10490 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
10494 /* Read an offset from the data stream. The size of the offset is
10495 given by cu_header->offset_size. */
10498 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
10499 unsigned int *bytes_read
)
10501 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
10503 *bytes_read
= cu_header
->offset_size
;
10507 /* Read an offset from the data stream. */
10510 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
10512 LONGEST retval
= 0;
10514 switch (offset_size
)
10517 retval
= bfd_get_32 (abfd
, buf
);
10520 retval
= bfd_get_64 (abfd
, buf
);
10523 internal_error (__FILE__
, __LINE__
,
10524 _("read_offset_1: bad switch [in module %s]"),
10525 bfd_get_filename (abfd
));
10532 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
10534 /* If the size of a host char is 8 bits, we can return a pointer
10535 to the buffer, otherwise we have to copy the data to a buffer
10536 allocated on the temporary obstack. */
10537 gdb_assert (HOST_CHAR_BIT
== 8);
10542 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10544 /* If the size of a host char is 8 bits, we can return a pointer
10545 to the string, otherwise we have to copy the string to a buffer
10546 allocated on the temporary obstack. */
10547 gdb_assert (HOST_CHAR_BIT
== 8);
10550 *bytes_read_ptr
= 1;
10553 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
10554 return (char *) buf
;
10558 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
10560 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
10561 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
10562 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
10563 bfd_get_filename (abfd
));
10564 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
10565 error (_("DW_FORM_strp pointing outside of "
10566 ".debug_str section [in module %s]"),
10567 bfd_get_filename (abfd
));
10568 gdb_assert (HOST_CHAR_BIT
== 8);
10569 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
10571 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
10575 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
10576 const struct comp_unit_head
*cu_header
,
10577 unsigned int *bytes_read_ptr
)
10579 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
10581 return read_indirect_string_at_offset (abfd
, str_offset
);
10584 static unsigned long
10585 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10587 unsigned long result
;
10588 unsigned int num_read
;
10590 unsigned char byte
;
10598 byte
= bfd_get_8 (abfd
, buf
);
10601 result
|= ((unsigned long)(byte
& 127) << shift
);
10602 if ((byte
& 128) == 0)
10608 *bytes_read_ptr
= num_read
;
10613 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10616 int i
, shift
, num_read
;
10617 unsigned char byte
;
10625 byte
= bfd_get_8 (abfd
, buf
);
10628 result
|= ((long)(byte
& 127) << shift
);
10630 if ((byte
& 128) == 0)
10635 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
10636 result
|= -(((long)1) << shift
);
10637 *bytes_read_ptr
= num_read
;
10641 /* Return a pointer to just past the end of an LEB128 number in BUF. */
10644 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
10650 byte
= bfd_get_8 (abfd
, buf
);
10652 if ((byte
& 128) == 0)
10658 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
10665 cu
->language
= language_c
;
10667 case DW_LANG_C_plus_plus
:
10668 cu
->language
= language_cplus
;
10671 cu
->language
= language_d
;
10673 case DW_LANG_Fortran77
:
10674 case DW_LANG_Fortran90
:
10675 case DW_LANG_Fortran95
:
10676 cu
->language
= language_fortran
;
10678 case DW_LANG_Mips_Assembler
:
10679 cu
->language
= language_asm
;
10682 cu
->language
= language_java
;
10684 case DW_LANG_Ada83
:
10685 case DW_LANG_Ada95
:
10686 cu
->language
= language_ada
;
10688 case DW_LANG_Modula2
:
10689 cu
->language
= language_m2
;
10691 case DW_LANG_Pascal83
:
10692 cu
->language
= language_pascal
;
10695 cu
->language
= language_objc
;
10697 case DW_LANG_Cobol74
:
10698 case DW_LANG_Cobol85
:
10700 cu
->language
= language_minimal
;
10703 cu
->language_defn
= language_def (cu
->language
);
10706 /* Return the named attribute or NULL if not there. */
10708 static struct attribute
*
10709 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
10712 struct attribute
*spec
= NULL
;
10714 for (i
= 0; i
< die
->num_attrs
; ++i
)
10716 if (die
->attrs
[i
].name
== name
)
10717 return &die
->attrs
[i
];
10718 if (die
->attrs
[i
].name
== DW_AT_specification
10719 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
10720 spec
= &die
->attrs
[i
];
10725 die
= follow_die_ref (die
, spec
, &cu
);
10726 return dwarf2_attr (die
, name
, cu
);
10732 /* Return the named attribute or NULL if not there,
10733 but do not follow DW_AT_specification, etc.
10734 This is for use in contexts where we're reading .debug_types dies.
10735 Following DW_AT_specification, DW_AT_abstract_origin will take us
10736 back up the chain, and we want to go down. */
10738 static struct attribute
*
10739 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
10740 struct dwarf2_cu
*cu
)
10744 for (i
= 0; i
< die
->num_attrs
; ++i
)
10745 if (die
->attrs
[i
].name
== name
)
10746 return &die
->attrs
[i
];
10751 /* Return non-zero iff the attribute NAME is defined for the given DIE,
10752 and holds a non-zero value. This function should only be used for
10753 DW_FORM_flag or DW_FORM_flag_present attributes. */
10756 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
10758 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
10760 return (attr
&& DW_UNSND (attr
));
10764 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
10766 /* A DIE is a declaration if it has a DW_AT_declaration attribute
10767 which value is non-zero. However, we have to be careful with
10768 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
10769 (via dwarf2_flag_true_p) follows this attribute. So we may
10770 end up accidently finding a declaration attribute that belongs
10771 to a different DIE referenced by the specification attribute,
10772 even though the given DIE does not have a declaration attribute. */
10773 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
10774 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
10777 /* Return the die giving the specification for DIE, if there is
10778 one. *SPEC_CU is the CU containing DIE on input, and the CU
10779 containing the return value on output. If there is no
10780 specification, but there is an abstract origin, that is
10783 static struct die_info
*
10784 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
10786 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
10789 if (spec_attr
== NULL
)
10790 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
10792 if (spec_attr
== NULL
)
10795 return follow_die_ref (die
, spec_attr
, spec_cu
);
10798 /* Free the line_header structure *LH, and any arrays and strings it
10800 NOTE: This is also used as a "cleanup" function. */
10803 free_line_header (struct line_header
*lh
)
10805 if (lh
->standard_opcode_lengths
)
10806 xfree (lh
->standard_opcode_lengths
);
10808 /* Remember that all the lh->file_names[i].name pointers are
10809 pointers into debug_line_buffer, and don't need to be freed. */
10810 if (lh
->file_names
)
10811 xfree (lh
->file_names
);
10813 /* Similarly for the include directory names. */
10814 if (lh
->include_dirs
)
10815 xfree (lh
->include_dirs
);
10820 /* Add an entry to LH's include directory table. */
10823 add_include_dir (struct line_header
*lh
, char *include_dir
)
10825 /* Grow the array if necessary. */
10826 if (lh
->include_dirs_size
== 0)
10828 lh
->include_dirs_size
= 1; /* for testing */
10829 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
10830 * sizeof (*lh
->include_dirs
));
10832 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
10834 lh
->include_dirs_size
*= 2;
10835 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
10836 (lh
->include_dirs_size
10837 * sizeof (*lh
->include_dirs
)));
10840 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
10843 /* Add an entry to LH's file name table. */
10846 add_file_name (struct line_header
*lh
,
10848 unsigned int dir_index
,
10849 unsigned int mod_time
,
10850 unsigned int length
)
10852 struct file_entry
*fe
;
10854 /* Grow the array if necessary. */
10855 if (lh
->file_names_size
== 0)
10857 lh
->file_names_size
= 1; /* for testing */
10858 lh
->file_names
= xmalloc (lh
->file_names_size
10859 * sizeof (*lh
->file_names
));
10861 else if (lh
->num_file_names
>= lh
->file_names_size
)
10863 lh
->file_names_size
*= 2;
10864 lh
->file_names
= xrealloc (lh
->file_names
,
10865 (lh
->file_names_size
10866 * sizeof (*lh
->file_names
)));
10869 fe
= &lh
->file_names
[lh
->num_file_names
++];
10871 fe
->dir_index
= dir_index
;
10872 fe
->mod_time
= mod_time
;
10873 fe
->length
= length
;
10874 fe
->included_p
= 0;
10878 /* Read the statement program header starting at OFFSET in
10879 .debug_line, according to the endianness of ABFD. Return a pointer
10880 to a struct line_header, allocated using xmalloc.
10882 NOTE: the strings in the include directory and file name tables of
10883 the returned object point into debug_line_buffer, and must not be
10886 static struct line_header
*
10887 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
10888 struct dwarf2_cu
*cu
)
10890 struct cleanup
*back_to
;
10891 struct line_header
*lh
;
10892 gdb_byte
*line_ptr
;
10893 unsigned int bytes_read
, offset_size
;
10895 char *cur_dir
, *cur_file
;
10897 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
10898 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
10900 complaint (&symfile_complaints
, _("missing .debug_line section"));
10904 /* Make sure that at least there's room for the total_length field.
10905 That could be 12 bytes long, but we're just going to fudge that. */
10906 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
10908 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10912 lh
= xmalloc (sizeof (*lh
));
10913 memset (lh
, 0, sizeof (*lh
));
10914 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
10917 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
10919 /* Read in the header. */
10921 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
10922 &bytes_read
, &offset_size
);
10923 line_ptr
+= bytes_read
;
10924 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
10925 + dwarf2_per_objfile
->line
.size
))
10927 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10930 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
10931 lh
->version
= read_2_bytes (abfd
, line_ptr
);
10933 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
10934 line_ptr
+= offset_size
;
10935 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
10937 if (lh
->version
>= 4)
10939 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
10943 lh
->maximum_ops_per_instruction
= 1;
10945 if (lh
->maximum_ops_per_instruction
== 0)
10947 lh
->maximum_ops_per_instruction
= 1;
10948 complaint (&symfile_complaints
,
10949 _("invalid maximum_ops_per_instruction "
10950 "in `.debug_line' section"));
10953 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
10955 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
10957 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
10959 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
10961 lh
->standard_opcode_lengths
10962 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
10964 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
10965 for (i
= 1; i
< lh
->opcode_base
; ++i
)
10967 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
10971 /* Read directory table. */
10972 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10974 line_ptr
+= bytes_read
;
10975 add_include_dir (lh
, cur_dir
);
10977 line_ptr
+= bytes_read
;
10979 /* Read file name table. */
10980 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10982 unsigned int dir_index
, mod_time
, length
;
10984 line_ptr
+= bytes_read
;
10985 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10986 line_ptr
+= bytes_read
;
10987 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10988 line_ptr
+= bytes_read
;
10989 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10990 line_ptr
+= bytes_read
;
10992 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10994 line_ptr
+= bytes_read
;
10995 lh
->statement_program_start
= line_ptr
;
10997 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
10998 + dwarf2_per_objfile
->line
.size
))
10999 complaint (&symfile_complaints
,
11000 _("line number info header doesn't "
11001 "fit in `.debug_line' section"));
11003 discard_cleanups (back_to
);
11007 /* Subroutine of dwarf_decode_lines to simplify it.
11008 Return the file name of the psymtab for included file FILE_INDEX
11009 in line header LH of PST.
11010 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
11011 If space for the result is malloc'd, it will be freed by a cleanup.
11012 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
11015 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
11016 const struct partial_symtab
*pst
,
11017 const char *comp_dir
)
11019 const struct file_entry fe
= lh
->file_names
[file_index
];
11020 char *include_name
= fe
.name
;
11021 char *include_name_to_compare
= include_name
;
11022 char *dir_name
= NULL
;
11023 const char *pst_filename
;
11024 char *copied_name
= NULL
;
11028 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
11030 if (!IS_ABSOLUTE_PATH (include_name
)
11031 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
11033 /* Avoid creating a duplicate psymtab for PST.
11034 We do this by comparing INCLUDE_NAME and PST_FILENAME.
11035 Before we do the comparison, however, we need to account
11036 for DIR_NAME and COMP_DIR.
11037 First prepend dir_name (if non-NULL). If we still don't
11038 have an absolute path prepend comp_dir (if non-NULL).
11039 However, the directory we record in the include-file's
11040 psymtab does not contain COMP_DIR (to match the
11041 corresponding symtab(s)).
11046 bash$ gcc -g ./hello.c
11047 include_name = "hello.c"
11049 DW_AT_comp_dir = comp_dir = "/tmp"
11050 DW_AT_name = "./hello.c" */
11052 if (dir_name
!= NULL
)
11054 include_name
= concat (dir_name
, SLASH_STRING
,
11055 include_name
, (char *)NULL
);
11056 include_name_to_compare
= include_name
;
11057 make_cleanup (xfree
, include_name
);
11059 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
11061 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
11062 include_name
, (char *)NULL
);
11066 pst_filename
= pst
->filename
;
11067 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
11069 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
11070 pst_filename
, (char *)NULL
);
11071 pst_filename
= copied_name
;
11074 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
11076 if (include_name_to_compare
!= include_name
)
11077 xfree (include_name_to_compare
);
11078 if (copied_name
!= NULL
)
11079 xfree (copied_name
);
11083 return include_name
;
11086 /* Ignore this record_line request. */
11089 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
11094 /* Subroutine of dwarf_decode_lines to simplify it.
11095 Process the line number information in LH. */
11098 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
11099 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
11101 gdb_byte
*line_ptr
, *extended_end
;
11102 gdb_byte
*line_end
;
11103 unsigned int bytes_read
, extended_len
;
11104 unsigned char op_code
, extended_op
, adj_opcode
;
11105 CORE_ADDR baseaddr
;
11106 struct objfile
*objfile
= cu
->objfile
;
11107 bfd
*abfd
= objfile
->obfd
;
11108 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11109 const int decode_for_pst_p
= (pst
!= NULL
);
11110 struct subfile
*last_subfile
= NULL
;
11111 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
11114 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11116 line_ptr
= lh
->statement_program_start
;
11117 line_end
= lh
->statement_program_end
;
11119 /* Read the statement sequences until there's nothing left. */
11120 while (line_ptr
< line_end
)
11122 /* state machine registers */
11123 CORE_ADDR address
= 0;
11124 unsigned int file
= 1;
11125 unsigned int line
= 1;
11126 unsigned int column
= 0;
11127 int is_stmt
= lh
->default_is_stmt
;
11128 int basic_block
= 0;
11129 int end_sequence
= 0;
11131 unsigned char op_index
= 0;
11133 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
11135 /* Start a subfile for the current file of the state machine. */
11136 /* lh->include_dirs and lh->file_names are 0-based, but the
11137 directory and file name numbers in the statement program
11139 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11143 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11145 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11148 /* Decode the table. */
11149 while (!end_sequence
)
11151 op_code
= read_1_byte (abfd
, line_ptr
);
11153 if (line_ptr
> line_end
)
11155 dwarf2_debug_line_missing_end_sequence_complaint ();
11159 if (op_code
>= lh
->opcode_base
)
11161 /* Special operand. */
11162 adj_opcode
= op_code
- lh
->opcode_base
;
11163 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
11164 / lh
->maximum_ops_per_instruction
)
11165 * lh
->minimum_instruction_length
);
11166 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
11167 % lh
->maximum_ops_per_instruction
);
11168 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
11169 if (lh
->num_file_names
< file
|| file
== 0)
11170 dwarf2_debug_line_missing_file_complaint ();
11171 /* For now we ignore lines not starting on an
11172 instruction boundary. */
11173 else if (op_index
== 0)
11175 lh
->file_names
[file
- 1].included_p
= 1;
11176 if (!decode_for_pst_p
&& is_stmt
)
11178 if (last_subfile
!= current_subfile
)
11180 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11182 (*p_record_line
) (last_subfile
, 0, addr
);
11183 last_subfile
= current_subfile
;
11185 /* Append row to matrix using current values. */
11186 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11187 (*p_record_line
) (current_subfile
, line
, addr
);
11192 else switch (op_code
)
11194 case DW_LNS_extended_op
:
11195 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
11197 line_ptr
+= bytes_read
;
11198 extended_end
= line_ptr
+ extended_len
;
11199 extended_op
= read_1_byte (abfd
, line_ptr
);
11201 switch (extended_op
)
11203 case DW_LNE_end_sequence
:
11204 p_record_line
= record_line
;
11207 case DW_LNE_set_address
:
11208 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
11210 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11212 /* This line table is for a function which has been
11213 GCd by the linker. Ignore it. PR gdb/12528 */
11216 = line_ptr
- dwarf2_per_objfile
->line
.buffer
;
11218 complaint (&symfile_complaints
,
11219 _(".debug_line address at offset 0x%lx is 0 "
11221 line_offset
, objfile
->name
);
11222 p_record_line
= noop_record_line
;
11226 line_ptr
+= bytes_read
;
11227 address
+= baseaddr
;
11229 case DW_LNE_define_file
:
11232 unsigned int dir_index
, mod_time
, length
;
11234 cur_file
= read_direct_string (abfd
, line_ptr
,
11236 line_ptr
+= bytes_read
;
11238 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11239 line_ptr
+= bytes_read
;
11241 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11242 line_ptr
+= bytes_read
;
11244 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11245 line_ptr
+= bytes_read
;
11246 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
11249 case DW_LNE_set_discriminator
:
11250 /* The discriminator is not interesting to the debugger;
11252 line_ptr
= extended_end
;
11255 complaint (&symfile_complaints
,
11256 _("mangled .debug_line section"));
11259 /* Make sure that we parsed the extended op correctly. If e.g.
11260 we expected a different address size than the producer used,
11261 we may have read the wrong number of bytes. */
11262 if (line_ptr
!= extended_end
)
11264 complaint (&symfile_complaints
,
11265 _("mangled .debug_line section"));
11270 if (lh
->num_file_names
< file
|| file
== 0)
11271 dwarf2_debug_line_missing_file_complaint ();
11274 lh
->file_names
[file
- 1].included_p
= 1;
11275 if (!decode_for_pst_p
&& is_stmt
)
11277 if (last_subfile
!= current_subfile
)
11279 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11281 (*p_record_line
) (last_subfile
, 0, addr
);
11282 last_subfile
= current_subfile
;
11284 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11285 (*p_record_line
) (current_subfile
, line
, addr
);
11290 case DW_LNS_advance_pc
:
11293 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11295 address
+= (((op_index
+ adjust
)
11296 / lh
->maximum_ops_per_instruction
)
11297 * lh
->minimum_instruction_length
);
11298 op_index
= ((op_index
+ adjust
)
11299 % lh
->maximum_ops_per_instruction
);
11300 line_ptr
+= bytes_read
;
11303 case DW_LNS_advance_line
:
11304 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
11305 line_ptr
+= bytes_read
;
11307 case DW_LNS_set_file
:
11309 /* The arrays lh->include_dirs and lh->file_names are
11310 0-based, but the directory and file name numbers in
11311 the statement program are 1-based. */
11312 struct file_entry
*fe
;
11315 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11316 line_ptr
+= bytes_read
;
11317 if (lh
->num_file_names
< file
|| file
== 0)
11318 dwarf2_debug_line_missing_file_complaint ();
11321 fe
= &lh
->file_names
[file
- 1];
11323 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11324 if (!decode_for_pst_p
)
11326 last_subfile
= current_subfile
;
11327 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11332 case DW_LNS_set_column
:
11333 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11334 line_ptr
+= bytes_read
;
11336 case DW_LNS_negate_stmt
:
11337 is_stmt
= (!is_stmt
);
11339 case DW_LNS_set_basic_block
:
11342 /* Add to the address register of the state machine the
11343 address increment value corresponding to special opcode
11344 255. I.e., this value is scaled by the minimum
11345 instruction length since special opcode 255 would have
11346 scaled the increment. */
11347 case DW_LNS_const_add_pc
:
11349 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
11351 address
+= (((op_index
+ adjust
)
11352 / lh
->maximum_ops_per_instruction
)
11353 * lh
->minimum_instruction_length
);
11354 op_index
= ((op_index
+ adjust
)
11355 % lh
->maximum_ops_per_instruction
);
11358 case DW_LNS_fixed_advance_pc
:
11359 address
+= read_2_bytes (abfd
, line_ptr
);
11365 /* Unknown standard opcode, ignore it. */
11368 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
11370 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11371 line_ptr
+= bytes_read
;
11376 if (lh
->num_file_names
< file
|| file
== 0)
11377 dwarf2_debug_line_missing_file_complaint ();
11380 lh
->file_names
[file
- 1].included_p
= 1;
11381 if (!decode_for_pst_p
)
11383 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11384 (*p_record_line
) (current_subfile
, 0, addr
);
11390 /* Decode the Line Number Program (LNP) for the given line_header
11391 structure and CU. The actual information extracted and the type
11392 of structures created from the LNP depends on the value of PST.
11394 1. If PST is NULL, then this procedure uses the data from the program
11395 to create all necessary symbol tables, and their linetables.
11397 2. If PST is not NULL, this procedure reads the program to determine
11398 the list of files included by the unit represented by PST, and
11399 builds all the associated partial symbol tables.
11401 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
11402 It is used for relative paths in the line table.
11403 NOTE: When processing partial symtabs (pst != NULL),
11404 comp_dir == pst->dirname.
11406 NOTE: It is important that psymtabs have the same file name (via strcmp)
11407 as the corresponding symtab. Since COMP_DIR is not used in the name of the
11408 symtab we don't use it in the name of the psymtabs we create.
11409 E.g. expand_line_sal requires this when finding psymtabs to expand.
11410 A good testcase for this is mb-inline.exp. */
11413 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
11414 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
11415 int want_line_info
)
11417 struct objfile
*objfile
= cu
->objfile
;
11418 const int decode_for_pst_p
= (pst
!= NULL
);
11419 struct subfile
*first_subfile
= current_subfile
;
11421 if (want_line_info
)
11422 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
11424 if (decode_for_pst_p
)
11428 /* Now that we're done scanning the Line Header Program, we can
11429 create the psymtab of each included file. */
11430 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
11431 if (lh
->file_names
[file_index
].included_p
== 1)
11433 char *include_name
=
11434 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
11435 if (include_name
!= NULL
)
11436 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
11441 /* Make sure a symtab is created for every file, even files
11442 which contain only variables (i.e. no code with associated
11446 for (i
= 0; i
< lh
->num_file_names
; i
++)
11449 struct file_entry
*fe
;
11451 fe
= &lh
->file_names
[i
];
11453 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11454 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11456 /* Skip the main file; we don't need it, and it must be
11457 allocated last, so that it will show up before the
11458 non-primary symtabs in the objfile's symtab list. */
11459 if (current_subfile
== first_subfile
)
11462 if (current_subfile
->symtab
== NULL
)
11463 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
11465 fe
->symtab
= current_subfile
->symtab
;
11470 /* Start a subfile for DWARF. FILENAME is the name of the file and
11471 DIRNAME the name of the source directory which contains FILENAME
11472 or NULL if not known. COMP_DIR is the compilation directory for the
11473 linetable's compilation unit or NULL if not known.
11474 This routine tries to keep line numbers from identical absolute and
11475 relative file names in a common subfile.
11477 Using the `list' example from the GDB testsuite, which resides in
11478 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
11479 of /srcdir/list0.c yields the following debugging information for list0.c:
11481 DW_AT_name: /srcdir/list0.c
11482 DW_AT_comp_dir: /compdir
11483 files.files[0].name: list0.h
11484 files.files[0].dir: /srcdir
11485 files.files[1].name: list0.c
11486 files.files[1].dir: /srcdir
11488 The line number information for list0.c has to end up in a single
11489 subfile, so that `break /srcdir/list0.c:1' works as expected.
11490 start_subfile will ensure that this happens provided that we pass the
11491 concatenation of files.files[1].dir and files.files[1].name as the
11495 dwarf2_start_subfile (char *filename
, const char *dirname
,
11496 const char *comp_dir
)
11500 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
11501 `start_symtab' will always pass the contents of DW_AT_comp_dir as
11502 second argument to start_subfile. To be consistent, we do the
11503 same here. In order not to lose the line information directory,
11504 we concatenate it to the filename when it makes sense.
11505 Note that the Dwarf3 standard says (speaking of filenames in line
11506 information): ``The directory index is ignored for file names
11507 that represent full path names''. Thus ignoring dirname in the
11508 `else' branch below isn't an issue. */
11510 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
11511 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
11513 fullname
= filename
;
11515 start_subfile (fullname
, comp_dir
);
11517 if (fullname
!= filename
)
11522 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
11523 struct dwarf2_cu
*cu
)
11525 struct objfile
*objfile
= cu
->objfile
;
11526 struct comp_unit_head
*cu_header
= &cu
->header
;
11528 /* NOTE drow/2003-01-30: There used to be a comment and some special
11529 code here to turn a symbol with DW_AT_external and a
11530 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
11531 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
11532 with some versions of binutils) where shared libraries could have
11533 relocations against symbols in their debug information - the
11534 minimal symbol would have the right address, but the debug info
11535 would not. It's no longer necessary, because we will explicitly
11536 apply relocations when we read in the debug information now. */
11538 /* A DW_AT_location attribute with no contents indicates that a
11539 variable has been optimized away. */
11540 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
11542 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
11546 /* Handle one degenerate form of location expression specially, to
11547 preserve GDB's previous behavior when section offsets are
11548 specified. If this is just a DW_OP_addr then mark this symbol
11551 if (attr_form_is_block (attr
)
11552 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
11553 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
11555 unsigned int dummy
;
11557 SYMBOL_VALUE_ADDRESS (sym
) =
11558 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
11559 SYMBOL_CLASS (sym
) = LOC_STATIC
;
11560 fixup_symbol_section (sym
, objfile
);
11561 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
11562 SYMBOL_SECTION (sym
));
11566 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
11567 expression evaluator, and use LOC_COMPUTED only when necessary
11568 (i.e. when the value of a register or memory location is
11569 referenced, or a thread-local block, etc.). Then again, it might
11570 not be worthwhile. I'm assuming that it isn't unless performance
11571 or memory numbers show me otherwise. */
11573 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
11574 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11576 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
11577 cu
->has_loclist
= 1;
11580 /* Given a pointer to a DWARF information entry, figure out if we need
11581 to make a symbol table entry for it, and if so, create a new entry
11582 and return a pointer to it.
11583 If TYPE is NULL, determine symbol type from the die, otherwise
11584 used the passed type.
11585 If SPACE is not NULL, use it to hold the new symbol. If it is
11586 NULL, allocate a new symbol on the objfile's obstack. */
11588 static struct symbol
*
11589 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
11590 struct symbol
*space
)
11592 struct objfile
*objfile
= cu
->objfile
;
11593 struct symbol
*sym
= NULL
;
11595 struct attribute
*attr
= NULL
;
11596 struct attribute
*attr2
= NULL
;
11597 CORE_ADDR baseaddr
;
11598 struct pending
**list_to_add
= NULL
;
11600 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11602 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11604 name
= dwarf2_name (die
, cu
);
11607 const char *linkagename
;
11608 int suppress_add
= 0;
11613 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
11614 OBJSTAT (objfile
, n_syms
++);
11616 /* Cache this symbol's name and the name's demangled form (if any). */
11617 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
11618 linkagename
= dwarf2_physname (name
, die
, cu
);
11619 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
11621 /* Fortran does not have mangling standard and the mangling does differ
11622 between gfortran, iFort etc. */
11623 if (cu
->language
== language_fortran
11624 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
11625 symbol_set_demangled_name (&(sym
->ginfo
),
11626 (char *) dwarf2_full_name (name
, die
, cu
),
11629 /* Default assumptions.
11630 Use the passed type or decode it from the die. */
11631 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11632 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
11634 SYMBOL_TYPE (sym
) = type
;
11636 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
11637 attr
= dwarf2_attr (die
,
11638 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
11642 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
11645 attr
= dwarf2_attr (die
,
11646 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
11650 int file_index
= DW_UNSND (attr
);
11652 if (cu
->line_header
== NULL
11653 || file_index
> cu
->line_header
->num_file_names
)
11654 complaint (&symfile_complaints
,
11655 _("file index out of range"));
11656 else if (file_index
> 0)
11658 struct file_entry
*fe
;
11660 fe
= &cu
->line_header
->file_names
[file_index
- 1];
11661 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
11668 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11671 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
11673 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
11674 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
11675 SYMBOL_CLASS (sym
) = LOC_LABEL
;
11676 add_symbol_to_list (sym
, cu
->list_in_scope
);
11678 case DW_TAG_subprogram
:
11679 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
11681 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
11682 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11683 if ((attr2
&& (DW_UNSND (attr2
) != 0))
11684 || cu
->language
== language_ada
)
11686 /* Subprograms marked external are stored as a global symbol.
11687 Ada subprograms, whether marked external or not, are always
11688 stored as a global symbol, because we want to be able to
11689 access them globally. For instance, we want to be able
11690 to break on a nested subprogram without having to
11691 specify the context. */
11692 list_to_add
= &global_symbols
;
11696 list_to_add
= cu
->list_in_scope
;
11699 case DW_TAG_inlined_subroutine
:
11700 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
11702 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
11703 SYMBOL_INLINED (sym
) = 1;
11704 /* Do not add the symbol to any lists. It will be found via
11705 BLOCK_FUNCTION from the blockvector. */
11707 case DW_TAG_template_value_param
:
11709 /* Fall through. */
11710 case DW_TAG_constant
:
11711 case DW_TAG_variable
:
11712 case DW_TAG_member
:
11713 /* Compilation with minimal debug info may result in
11714 variables with missing type entries. Change the
11715 misleading `void' type to something sensible. */
11716 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
11718 = objfile_type (objfile
)->nodebug_data_symbol
;
11720 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11721 /* In the case of DW_TAG_member, we should only be called for
11722 static const members. */
11723 if (die
->tag
== DW_TAG_member
)
11725 /* dwarf2_add_field uses die_is_declaration,
11726 so we do the same. */
11727 gdb_assert (die_is_declaration (die
, cu
));
11732 dwarf2_const_value (attr
, sym
, cu
);
11733 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11736 if (attr2
&& (DW_UNSND (attr2
) != 0))
11737 list_to_add
= &global_symbols
;
11739 list_to_add
= cu
->list_in_scope
;
11743 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11746 var_decode_location (attr
, sym
, cu
);
11747 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11748 if (SYMBOL_CLASS (sym
) == LOC_STATIC
11749 && SYMBOL_VALUE_ADDRESS (sym
) == 0
11750 && !dwarf2_per_objfile
->has_section_at_zero
)
11752 /* When a static variable is eliminated by the linker,
11753 the corresponding debug information is not stripped
11754 out, but the variable address is set to null;
11755 do not add such variables into symbol table. */
11757 else if (attr2
&& (DW_UNSND (attr2
) != 0))
11759 /* Workaround gfortran PR debug/40040 - it uses
11760 DW_AT_location for variables in -fPIC libraries which may
11761 get overriden by other libraries/executable and get
11762 a different address. Resolve it by the minimal symbol
11763 which may come from inferior's executable using copy
11764 relocation. Make this workaround only for gfortran as for
11765 other compilers GDB cannot guess the minimal symbol
11766 Fortran mangling kind. */
11767 if (cu
->language
== language_fortran
&& die
->parent
11768 && die
->parent
->tag
== DW_TAG_module
11770 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
11771 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11773 /* A variable with DW_AT_external is never static,
11774 but it may be block-scoped. */
11775 list_to_add
= (cu
->list_in_scope
== &file_symbols
11776 ? &global_symbols
: cu
->list_in_scope
);
11779 list_to_add
= cu
->list_in_scope
;
11783 /* We do not know the address of this symbol.
11784 If it is an external symbol and we have type information
11785 for it, enter the symbol as a LOC_UNRESOLVED symbol.
11786 The address of the variable will then be determined from
11787 the minimal symbol table whenever the variable is
11789 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11790 if (attr2
&& (DW_UNSND (attr2
) != 0)
11791 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
11793 /* A variable with DW_AT_external is never static, but it
11794 may be block-scoped. */
11795 list_to_add
= (cu
->list_in_scope
== &file_symbols
11796 ? &global_symbols
: cu
->list_in_scope
);
11798 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11800 else if (!die_is_declaration (die
, cu
))
11802 /* Use the default LOC_OPTIMIZED_OUT class. */
11803 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
11805 list_to_add
= cu
->list_in_scope
;
11809 case DW_TAG_formal_parameter
:
11810 /* If we are inside a function, mark this as an argument. If
11811 not, we might be looking at an argument to an inlined function
11812 when we do not have enough information to show inlined frames;
11813 pretend it's a local variable in that case so that the user can
11815 if (context_stack_depth
> 0
11816 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
11817 SYMBOL_IS_ARGUMENT (sym
) = 1;
11818 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11821 var_decode_location (attr
, sym
, cu
);
11823 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11826 dwarf2_const_value (attr
, sym
, cu
);
11829 list_to_add
= cu
->list_in_scope
;
11831 case DW_TAG_unspecified_parameters
:
11832 /* From varargs functions; gdb doesn't seem to have any
11833 interest in this information, so just ignore it for now.
11836 case DW_TAG_template_type_param
:
11838 /* Fall through. */
11839 case DW_TAG_class_type
:
11840 case DW_TAG_interface_type
:
11841 case DW_TAG_structure_type
:
11842 case DW_TAG_union_type
:
11843 case DW_TAG_set_type
:
11844 case DW_TAG_enumeration_type
:
11845 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11846 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
11849 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11850 really ever be static objects: otherwise, if you try
11851 to, say, break of a class's method and you're in a file
11852 which doesn't mention that class, it won't work unless
11853 the check for all static symbols in lookup_symbol_aux
11854 saves you. See the OtherFileClass tests in
11855 gdb.c++/namespace.exp. */
11859 list_to_add
= (cu
->list_in_scope
== &file_symbols
11860 && (cu
->language
== language_cplus
11861 || cu
->language
== language_java
)
11862 ? &global_symbols
: cu
->list_in_scope
);
11864 /* The semantics of C++ state that "struct foo {
11865 ... }" also defines a typedef for "foo". A Java
11866 class declaration also defines a typedef for the
11868 if (cu
->language
== language_cplus
11869 || cu
->language
== language_java
11870 || cu
->language
== language_ada
)
11872 /* The symbol's name is already allocated along
11873 with this objfile, so we don't need to
11874 duplicate it for the type. */
11875 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
11876 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
11881 case DW_TAG_typedef
:
11882 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11883 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11884 list_to_add
= cu
->list_in_scope
;
11886 case DW_TAG_base_type
:
11887 case DW_TAG_subrange_type
:
11888 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11889 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11890 list_to_add
= cu
->list_in_scope
;
11892 case DW_TAG_enumerator
:
11893 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11896 dwarf2_const_value (attr
, sym
, cu
);
11899 /* NOTE: carlton/2003-11-10: See comment above in the
11900 DW_TAG_class_type, etc. block. */
11902 list_to_add
= (cu
->list_in_scope
== &file_symbols
11903 && (cu
->language
== language_cplus
11904 || cu
->language
== language_java
)
11905 ? &global_symbols
: cu
->list_in_scope
);
11908 case DW_TAG_namespace
:
11909 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11910 list_to_add
= &global_symbols
;
11913 /* Not a tag we recognize. Hopefully we aren't processing
11914 trash data, but since we must specifically ignore things
11915 we don't recognize, there is nothing else we should do at
11917 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
11918 dwarf_tag_name (die
->tag
));
11924 sym
->hash_next
= objfile
->template_symbols
;
11925 objfile
->template_symbols
= sym
;
11926 list_to_add
= NULL
;
11929 if (list_to_add
!= NULL
)
11930 add_symbol_to_list (sym
, list_to_add
);
11932 /* For the benefit of old versions of GCC, check for anonymous
11933 namespaces based on the demangled name. */
11934 if (!processing_has_namespace_info
11935 && cu
->language
== language_cplus
)
11936 cp_scan_for_anonymous_namespaces (sym
, objfile
);
11941 /* A wrapper for new_symbol_full that always allocates a new symbol. */
11943 static struct symbol
*
11944 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11946 return new_symbol_full (die
, type
, cu
, NULL
);
11949 /* Given an attr with a DW_FORM_dataN value in host byte order,
11950 zero-extend it as appropriate for the symbol's type. The DWARF
11951 standard (v4) is not entirely clear about the meaning of using
11952 DW_FORM_dataN for a constant with a signed type, where the type is
11953 wider than the data. The conclusion of a discussion on the DWARF
11954 list was that this is unspecified. We choose to always zero-extend
11955 because that is the interpretation long in use by GCC. */
11958 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
11959 const char *name
, struct obstack
*obstack
,
11960 struct dwarf2_cu
*cu
, long *value
, int bits
)
11962 struct objfile
*objfile
= cu
->objfile
;
11963 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
11964 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
11965 LONGEST l
= DW_UNSND (attr
);
11967 if (bits
< sizeof (*value
) * 8)
11969 l
&= ((LONGEST
) 1 << bits
) - 1;
11972 else if (bits
== sizeof (*value
) * 8)
11976 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
11977 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
11984 /* Read a constant value from an attribute. Either set *VALUE, or if
11985 the value does not fit in *VALUE, set *BYTES - either already
11986 allocated on the objfile obstack, or newly allocated on OBSTACK,
11987 or, set *BATON, if we translated the constant to a location
11991 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
11992 const char *name
, struct obstack
*obstack
,
11993 struct dwarf2_cu
*cu
,
11994 long *value
, gdb_byte
**bytes
,
11995 struct dwarf2_locexpr_baton
**baton
)
11997 struct objfile
*objfile
= cu
->objfile
;
11998 struct comp_unit_head
*cu_header
= &cu
->header
;
11999 struct dwarf_block
*blk
;
12000 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
12001 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
12007 switch (attr
->form
)
12013 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
12014 dwarf2_const_value_length_mismatch_complaint (name
,
12015 cu_header
->addr_size
,
12016 TYPE_LENGTH (type
));
12017 /* Symbols of this form are reasonably rare, so we just
12018 piggyback on the existing location code rather than writing
12019 a new implementation of symbol_computed_ops. */
12020 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
12021 sizeof (struct dwarf2_locexpr_baton
));
12022 (*baton
)->per_cu
= cu
->per_cu
;
12023 gdb_assert ((*baton
)->per_cu
);
12025 (*baton
)->size
= 2 + cu_header
->addr_size
;
12026 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
12027 (*baton
)->data
= data
;
12029 data
[0] = DW_OP_addr
;
12030 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
12031 byte_order
, DW_ADDR (attr
));
12032 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
12035 case DW_FORM_string
:
12037 /* DW_STRING is already allocated on the objfile obstack, point
12039 *bytes
= (gdb_byte
*) DW_STRING (attr
);
12041 case DW_FORM_block1
:
12042 case DW_FORM_block2
:
12043 case DW_FORM_block4
:
12044 case DW_FORM_block
:
12045 case DW_FORM_exprloc
:
12046 blk
= DW_BLOCK (attr
);
12047 if (TYPE_LENGTH (type
) != blk
->size
)
12048 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
12049 TYPE_LENGTH (type
));
12050 *bytes
= blk
->data
;
12053 /* The DW_AT_const_value attributes are supposed to carry the
12054 symbol's value "represented as it would be on the target
12055 architecture." By the time we get here, it's already been
12056 converted to host endianness, so we just need to sign- or
12057 zero-extend it as appropriate. */
12058 case DW_FORM_data1
:
12059 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12060 obstack
, cu
, value
, 8);
12062 case DW_FORM_data2
:
12063 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12064 obstack
, cu
, value
, 16);
12066 case DW_FORM_data4
:
12067 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12068 obstack
, cu
, value
, 32);
12070 case DW_FORM_data8
:
12071 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12072 obstack
, cu
, value
, 64);
12075 case DW_FORM_sdata
:
12076 *value
= DW_SND (attr
);
12079 case DW_FORM_udata
:
12080 *value
= DW_UNSND (attr
);
12084 complaint (&symfile_complaints
,
12085 _("unsupported const value attribute form: '%s'"),
12086 dwarf_form_name (attr
->form
));
12093 /* Copy constant value from an attribute to a symbol. */
12096 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
12097 struct dwarf2_cu
*cu
)
12099 struct objfile
*objfile
= cu
->objfile
;
12100 struct comp_unit_head
*cu_header
= &cu
->header
;
12103 struct dwarf2_locexpr_baton
*baton
;
12105 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
12106 SYMBOL_PRINT_NAME (sym
),
12107 &objfile
->objfile_obstack
, cu
,
12108 &value
, &bytes
, &baton
);
12112 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
12113 SYMBOL_LOCATION_BATON (sym
) = baton
;
12114 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
12116 else if (bytes
!= NULL
)
12118 SYMBOL_VALUE_BYTES (sym
) = bytes
;
12119 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
12123 SYMBOL_VALUE (sym
) = value
;
12124 SYMBOL_CLASS (sym
) = LOC_CONST
;
12128 /* Return the type of the die in question using its DW_AT_type attribute. */
12130 static struct type
*
12131 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12133 struct attribute
*type_attr
;
12135 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
12138 /* A missing DW_AT_type represents a void type. */
12139 return objfile_type (cu
->objfile
)->builtin_void
;
12142 return lookup_die_type (die
, type_attr
, cu
);
12145 /* True iff CU's producer generates GNAT Ada auxiliary information
12146 that allows to find parallel types through that information instead
12147 of having to do expensive parallel lookups by type name. */
12150 need_gnat_info (struct dwarf2_cu
*cu
)
12152 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
12153 of GNAT produces this auxiliary information, without any indication
12154 that it is produced. Part of enhancing the FSF version of GNAT
12155 to produce that information will be to put in place an indicator
12156 that we can use in order to determine whether the descriptive type
12157 info is available or not. One suggestion that has been made is
12158 to use a new attribute, attached to the CU die. For now, assume
12159 that the descriptive type info is not available. */
12163 /* Return the auxiliary type of the die in question using its
12164 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
12165 attribute is not present. */
12167 static struct type
*
12168 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12170 struct attribute
*type_attr
;
12172 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
12176 return lookup_die_type (die
, type_attr
, cu
);
12179 /* If DIE has a descriptive_type attribute, then set the TYPE's
12180 descriptive type accordingly. */
12183 set_descriptive_type (struct type
*type
, struct die_info
*die
,
12184 struct dwarf2_cu
*cu
)
12186 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
12188 if (descriptive_type
)
12190 ALLOCATE_GNAT_AUX_TYPE (type
);
12191 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
12195 /* Return the containing type of the die in question using its
12196 DW_AT_containing_type attribute. */
12198 static struct type
*
12199 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12201 struct attribute
*type_attr
;
12203 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
12205 error (_("Dwarf Error: Problem turning containing type into gdb type "
12206 "[in module %s]"), cu
->objfile
->name
);
12208 return lookup_die_type (die
, type_attr
, cu
);
12211 /* Look up the type of DIE in CU using its type attribute ATTR.
12212 If there is no type substitute an error marker. */
12214 static struct type
*
12215 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
12216 struct dwarf2_cu
*cu
)
12218 struct objfile
*objfile
= cu
->objfile
;
12219 struct type
*this_type
;
12221 /* First see if we have it cached. */
12223 if (is_ref_attr (attr
))
12225 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
12227 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
12229 else if (attr
->form
== DW_FORM_ref_sig8
)
12231 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12232 struct dwarf2_cu
*sig_cu
;
12233 unsigned int offset
;
12235 /* sig_type will be NULL if the signatured type is missing from
12237 if (sig_type
== NULL
)
12238 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12239 "at 0x%x [in module %s]"),
12240 die
->offset
, objfile
->name
);
12242 gdb_assert (sig_type
->per_cu
.debug_types_section
);
12243 offset
= sig_type
->per_cu
.offset
+ sig_type
->type_offset
;
12244 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
12248 dump_die_for_error (die
);
12249 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
12250 dwarf_attr_name (attr
->name
), objfile
->name
);
12253 /* If not cached we need to read it in. */
12255 if (this_type
== NULL
)
12257 struct die_info
*type_die
;
12258 struct dwarf2_cu
*type_cu
= cu
;
12260 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
12261 /* If the type is cached, we should have found it above. */
12262 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
12263 this_type
= read_type_die_1 (type_die
, type_cu
);
12266 /* If we still don't have a type use an error marker. */
12268 if (this_type
== NULL
)
12270 char *message
, *saved
;
12272 /* read_type_die already issued a complaint. */
12273 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
12277 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
12278 message
, strlen (message
));
12281 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
12287 /* Return the type in DIE, CU.
12288 Returns NULL for invalid types.
12290 This first does a lookup in the appropriate type_hash table,
12291 and only reads the die in if necessary.
12293 NOTE: This can be called when reading in partial or full symbols. */
12295 static struct type
*
12296 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
12298 struct type
*this_type
;
12300 this_type
= get_die_type (die
, cu
);
12304 return read_type_die_1 (die
, cu
);
12307 /* Read the type in DIE, CU.
12308 Returns NULL for invalid types. */
12310 static struct type
*
12311 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
12313 struct type
*this_type
= NULL
;
12317 case DW_TAG_class_type
:
12318 case DW_TAG_interface_type
:
12319 case DW_TAG_structure_type
:
12320 case DW_TAG_union_type
:
12321 this_type
= read_structure_type (die
, cu
);
12323 case DW_TAG_enumeration_type
:
12324 this_type
= read_enumeration_type (die
, cu
);
12326 case DW_TAG_subprogram
:
12327 case DW_TAG_subroutine_type
:
12328 case DW_TAG_inlined_subroutine
:
12329 this_type
= read_subroutine_type (die
, cu
);
12331 case DW_TAG_array_type
:
12332 this_type
= read_array_type (die
, cu
);
12334 case DW_TAG_set_type
:
12335 this_type
= read_set_type (die
, cu
);
12337 case DW_TAG_pointer_type
:
12338 this_type
= read_tag_pointer_type (die
, cu
);
12340 case DW_TAG_ptr_to_member_type
:
12341 this_type
= read_tag_ptr_to_member_type (die
, cu
);
12343 case DW_TAG_reference_type
:
12344 this_type
= read_tag_reference_type (die
, cu
);
12346 case DW_TAG_const_type
:
12347 this_type
= read_tag_const_type (die
, cu
);
12349 case DW_TAG_volatile_type
:
12350 this_type
= read_tag_volatile_type (die
, cu
);
12352 case DW_TAG_string_type
:
12353 this_type
= read_tag_string_type (die
, cu
);
12355 case DW_TAG_typedef
:
12356 this_type
= read_typedef (die
, cu
);
12358 case DW_TAG_subrange_type
:
12359 this_type
= read_subrange_type (die
, cu
);
12361 case DW_TAG_base_type
:
12362 this_type
= read_base_type (die
, cu
);
12364 case DW_TAG_unspecified_type
:
12365 this_type
= read_unspecified_type (die
, cu
);
12367 case DW_TAG_namespace
:
12368 this_type
= read_namespace_type (die
, cu
);
12370 case DW_TAG_module
:
12371 this_type
= read_module_type (die
, cu
);
12374 complaint (&symfile_complaints
,
12375 _("unexpected tag in read_type_die: '%s'"),
12376 dwarf_tag_name (die
->tag
));
12383 /* See if we can figure out if the class lives in a namespace. We do
12384 this by looking for a member function; its demangled name will
12385 contain namespace info, if there is any.
12386 Return the computed name or NULL.
12387 Space for the result is allocated on the objfile's obstack.
12388 This is the full-die version of guess_partial_die_structure_name.
12389 In this case we know DIE has no useful parent. */
12392 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
12394 struct die_info
*spec_die
;
12395 struct dwarf2_cu
*spec_cu
;
12396 struct die_info
*child
;
12399 spec_die
= die_specification (die
, &spec_cu
);
12400 if (spec_die
!= NULL
)
12406 for (child
= die
->child
;
12408 child
= child
->sibling
)
12410 if (child
->tag
== DW_TAG_subprogram
)
12412 struct attribute
*attr
;
12414 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
12416 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
12420 = language_class_name_from_physname (cu
->language_defn
,
12424 if (actual_name
!= NULL
)
12426 char *die_name
= dwarf2_name (die
, cu
);
12428 if (die_name
!= NULL
12429 && strcmp (die_name
, actual_name
) != 0)
12431 /* Strip off the class name from the full name.
12432 We want the prefix. */
12433 int die_name_len
= strlen (die_name
);
12434 int actual_name_len
= strlen (actual_name
);
12436 /* Test for '::' as a sanity check. */
12437 if (actual_name_len
> die_name_len
+ 2
12438 && actual_name
[actual_name_len
12439 - die_name_len
- 1] == ':')
12441 obsavestring (actual_name
,
12442 actual_name_len
- die_name_len
- 2,
12443 &cu
->objfile
->objfile_obstack
);
12446 xfree (actual_name
);
12455 /* GCC might emit a nameless typedef that has a linkage name. Determine the
12456 prefix part in such case. See
12457 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12460 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
12462 struct attribute
*attr
;
12465 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
12466 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
12469 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
12470 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
12473 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
12475 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
12476 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
12479 /* dwarf2_name had to be already called. */
12480 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
12482 /* Strip the base name, keep any leading namespaces/classes. */
12483 base
= strrchr (DW_STRING (attr
), ':');
12484 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
12487 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
12488 &cu
->objfile
->objfile_obstack
);
12491 /* Return the name of the namespace/class that DIE is defined within,
12492 or "" if we can't tell. The caller should not xfree the result.
12494 For example, if we're within the method foo() in the following
12504 then determine_prefix on foo's die will return "N::C". */
12506 static const char *
12507 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
12509 struct die_info
*parent
, *spec_die
;
12510 struct dwarf2_cu
*spec_cu
;
12511 struct type
*parent_type
;
12514 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
12515 && cu
->language
!= language_fortran
)
12518 retval
= anonymous_struct_prefix (die
, cu
);
12522 /* We have to be careful in the presence of DW_AT_specification.
12523 For example, with GCC 3.4, given the code
12527 // Definition of N::foo.
12531 then we'll have a tree of DIEs like this:
12533 1: DW_TAG_compile_unit
12534 2: DW_TAG_namespace // N
12535 3: DW_TAG_subprogram // declaration of N::foo
12536 4: DW_TAG_subprogram // definition of N::foo
12537 DW_AT_specification // refers to die #3
12539 Thus, when processing die #4, we have to pretend that we're in
12540 the context of its DW_AT_specification, namely the contex of die
12543 spec_die
= die_specification (die
, &spec_cu
);
12544 if (spec_die
== NULL
)
12545 parent
= die
->parent
;
12548 parent
= spec_die
->parent
;
12552 if (parent
== NULL
)
12554 else if (parent
->building_fullname
)
12557 const char *parent_name
;
12559 /* It has been seen on RealView 2.2 built binaries,
12560 DW_TAG_template_type_param types actually _defined_ as
12561 children of the parent class:
12564 template class <class Enum> Class{};
12565 Class<enum E> class_e;
12567 1: DW_TAG_class_type (Class)
12568 2: DW_TAG_enumeration_type (E)
12569 3: DW_TAG_enumerator (enum1:0)
12570 3: DW_TAG_enumerator (enum2:1)
12572 2: DW_TAG_template_type_param
12573 DW_AT_type DW_FORM_ref_udata (E)
12575 Besides being broken debug info, it can put GDB into an
12576 infinite loop. Consider:
12578 When we're building the full name for Class<E>, we'll start
12579 at Class, and go look over its template type parameters,
12580 finding E. We'll then try to build the full name of E, and
12581 reach here. We're now trying to build the full name of E,
12582 and look over the parent DIE for containing scope. In the
12583 broken case, if we followed the parent DIE of E, we'd again
12584 find Class, and once again go look at its template type
12585 arguments, etc., etc. Simply don't consider such parent die
12586 as source-level parent of this die (it can't be, the language
12587 doesn't allow it), and break the loop here. */
12588 name
= dwarf2_name (die
, cu
);
12589 parent_name
= dwarf2_name (parent
, cu
);
12590 complaint (&symfile_complaints
,
12591 _("template param type '%s' defined within parent '%s'"),
12592 name
? name
: "<unknown>",
12593 parent_name
? parent_name
: "<unknown>");
12597 switch (parent
->tag
)
12599 case DW_TAG_namespace
:
12600 parent_type
= read_type_die (parent
, cu
);
12601 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
12602 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
12603 Work around this problem here. */
12604 if (cu
->language
== language_cplus
12605 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
12607 /* We give a name to even anonymous namespaces. */
12608 return TYPE_TAG_NAME (parent_type
);
12609 case DW_TAG_class_type
:
12610 case DW_TAG_interface_type
:
12611 case DW_TAG_structure_type
:
12612 case DW_TAG_union_type
:
12613 case DW_TAG_module
:
12614 parent_type
= read_type_die (parent
, cu
);
12615 if (TYPE_TAG_NAME (parent_type
) != NULL
)
12616 return TYPE_TAG_NAME (parent_type
);
12618 /* An anonymous structure is only allowed non-static data
12619 members; no typedefs, no member functions, et cetera.
12620 So it does not need a prefix. */
12622 case DW_TAG_compile_unit
:
12623 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
12624 if (cu
->language
== language_cplus
12625 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
12626 && die
->child
!= NULL
12627 && (die
->tag
== DW_TAG_class_type
12628 || die
->tag
== DW_TAG_structure_type
12629 || die
->tag
== DW_TAG_union_type
))
12631 char *name
= guess_full_die_structure_name (die
, cu
);
12637 return determine_prefix (parent
, cu
);
12641 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
12642 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
12643 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
12644 an obconcat, otherwise allocate storage for the result. The CU argument is
12645 used to determine the language and hence, the appropriate separator. */
12647 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
12650 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
12651 int physname
, struct dwarf2_cu
*cu
)
12653 const char *lead
= "";
12656 if (suffix
== NULL
|| suffix
[0] == '\0'
12657 || prefix
== NULL
|| prefix
[0] == '\0')
12659 else if (cu
->language
== language_java
)
12661 else if (cu
->language
== language_fortran
&& physname
)
12663 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
12664 DW_AT_MIPS_linkage_name is preferred and used instead. */
12672 if (prefix
== NULL
)
12674 if (suffix
== NULL
)
12680 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
12682 strcpy (retval
, lead
);
12683 strcat (retval
, prefix
);
12684 strcat (retval
, sep
);
12685 strcat (retval
, suffix
);
12690 /* We have an obstack. */
12691 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
12695 /* Return sibling of die, NULL if no sibling. */
12697 static struct die_info
*
12698 sibling_die (struct die_info
*die
)
12700 return die
->sibling
;
12703 /* Get name of a die, return NULL if not found. */
12706 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
12707 struct obstack
*obstack
)
12709 if (name
&& cu
->language
== language_cplus
)
12711 char *canon_name
= cp_canonicalize_string (name
);
12713 if (canon_name
!= NULL
)
12715 if (strcmp (canon_name
, name
) != 0)
12716 name
= obsavestring (canon_name
, strlen (canon_name
),
12718 xfree (canon_name
);
12725 /* Get name of a die, return NULL if not found. */
12728 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
12730 struct attribute
*attr
;
12732 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
12733 if ((!attr
|| !DW_STRING (attr
))
12734 && die
->tag
!= DW_TAG_class_type
12735 && die
->tag
!= DW_TAG_interface_type
12736 && die
->tag
!= DW_TAG_structure_type
12737 && die
->tag
!= DW_TAG_union_type
)
12742 case DW_TAG_compile_unit
:
12743 /* Compilation units have a DW_AT_name that is a filename, not
12744 a source language identifier. */
12745 case DW_TAG_enumeration_type
:
12746 case DW_TAG_enumerator
:
12747 /* These tags always have simple identifiers already; no need
12748 to canonicalize them. */
12749 return DW_STRING (attr
);
12751 case DW_TAG_subprogram
:
12752 /* Java constructors will all be named "<init>", so return
12753 the class name when we see this special case. */
12754 if (cu
->language
== language_java
12755 && DW_STRING (attr
) != NULL
12756 && strcmp (DW_STRING (attr
), "<init>") == 0)
12758 struct dwarf2_cu
*spec_cu
= cu
;
12759 struct die_info
*spec_die
;
12761 /* GCJ will output '<init>' for Java constructor names.
12762 For this special case, return the name of the parent class. */
12764 /* GCJ may output suprogram DIEs with AT_specification set.
12765 If so, use the name of the specified DIE. */
12766 spec_die
= die_specification (die
, &spec_cu
);
12767 if (spec_die
!= NULL
)
12768 return dwarf2_name (spec_die
, spec_cu
);
12773 if (die
->tag
== DW_TAG_class_type
)
12774 return dwarf2_name (die
, cu
);
12776 while (die
->tag
!= DW_TAG_compile_unit
);
12780 case DW_TAG_class_type
:
12781 case DW_TAG_interface_type
:
12782 case DW_TAG_structure_type
:
12783 case DW_TAG_union_type
:
12784 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
12785 structures or unions. These were of the form "._%d" in GCC 4.1,
12786 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
12787 and GCC 4.4. We work around this problem by ignoring these. */
12788 if (attr
&& DW_STRING (attr
)
12789 && (strncmp (DW_STRING (attr
), "._", 2) == 0
12790 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
12793 /* GCC might emit a nameless typedef that has a linkage name. See
12794 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12795 if (!attr
|| DW_STRING (attr
) == NULL
)
12797 char *demangled
= NULL
;
12799 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
12801 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
12803 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
12806 /* Avoid demangling DW_STRING (attr) the second time on a second
12807 call for the same DIE. */
12808 if (!DW_STRING_IS_CANONICAL (attr
))
12809 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
12815 /* FIXME: we already did this for the partial symbol... */
12816 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
12817 &cu
->objfile
->objfile_obstack
);
12818 DW_STRING_IS_CANONICAL (attr
) = 1;
12821 /* Strip any leading namespaces/classes, keep only the base name.
12822 DW_AT_name for named DIEs does not contain the prefixes. */
12823 base
= strrchr (DW_STRING (attr
), ':');
12824 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
12827 return DW_STRING (attr
);
12836 if (!DW_STRING_IS_CANONICAL (attr
))
12839 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
12840 &cu
->objfile
->objfile_obstack
);
12841 DW_STRING_IS_CANONICAL (attr
) = 1;
12843 return DW_STRING (attr
);
12846 /* Return the die that this die in an extension of, or NULL if there
12847 is none. *EXT_CU is the CU containing DIE on input, and the CU
12848 containing the return value on output. */
12850 static struct die_info
*
12851 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
12853 struct attribute
*attr
;
12855 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
12859 return follow_die_ref (die
, attr
, ext_cu
);
12862 /* Convert a DIE tag into its string name. */
12865 dwarf_tag_name (unsigned tag
)
12869 case DW_TAG_padding
:
12870 return "DW_TAG_padding";
12871 case DW_TAG_array_type
:
12872 return "DW_TAG_array_type";
12873 case DW_TAG_class_type
:
12874 return "DW_TAG_class_type";
12875 case DW_TAG_entry_point
:
12876 return "DW_TAG_entry_point";
12877 case DW_TAG_enumeration_type
:
12878 return "DW_TAG_enumeration_type";
12879 case DW_TAG_formal_parameter
:
12880 return "DW_TAG_formal_parameter";
12881 case DW_TAG_imported_declaration
:
12882 return "DW_TAG_imported_declaration";
12884 return "DW_TAG_label";
12885 case DW_TAG_lexical_block
:
12886 return "DW_TAG_lexical_block";
12887 case DW_TAG_member
:
12888 return "DW_TAG_member";
12889 case DW_TAG_pointer_type
:
12890 return "DW_TAG_pointer_type";
12891 case DW_TAG_reference_type
:
12892 return "DW_TAG_reference_type";
12893 case DW_TAG_compile_unit
:
12894 return "DW_TAG_compile_unit";
12895 case DW_TAG_string_type
:
12896 return "DW_TAG_string_type";
12897 case DW_TAG_structure_type
:
12898 return "DW_TAG_structure_type";
12899 case DW_TAG_subroutine_type
:
12900 return "DW_TAG_subroutine_type";
12901 case DW_TAG_typedef
:
12902 return "DW_TAG_typedef";
12903 case DW_TAG_union_type
:
12904 return "DW_TAG_union_type";
12905 case DW_TAG_unspecified_parameters
:
12906 return "DW_TAG_unspecified_parameters";
12907 case DW_TAG_variant
:
12908 return "DW_TAG_variant";
12909 case DW_TAG_common_block
:
12910 return "DW_TAG_common_block";
12911 case DW_TAG_common_inclusion
:
12912 return "DW_TAG_common_inclusion";
12913 case DW_TAG_inheritance
:
12914 return "DW_TAG_inheritance";
12915 case DW_TAG_inlined_subroutine
:
12916 return "DW_TAG_inlined_subroutine";
12917 case DW_TAG_module
:
12918 return "DW_TAG_module";
12919 case DW_TAG_ptr_to_member_type
:
12920 return "DW_TAG_ptr_to_member_type";
12921 case DW_TAG_set_type
:
12922 return "DW_TAG_set_type";
12923 case DW_TAG_subrange_type
:
12924 return "DW_TAG_subrange_type";
12925 case DW_TAG_with_stmt
:
12926 return "DW_TAG_with_stmt";
12927 case DW_TAG_access_declaration
:
12928 return "DW_TAG_access_declaration";
12929 case DW_TAG_base_type
:
12930 return "DW_TAG_base_type";
12931 case DW_TAG_catch_block
:
12932 return "DW_TAG_catch_block";
12933 case DW_TAG_const_type
:
12934 return "DW_TAG_const_type";
12935 case DW_TAG_constant
:
12936 return "DW_TAG_constant";
12937 case DW_TAG_enumerator
:
12938 return "DW_TAG_enumerator";
12939 case DW_TAG_file_type
:
12940 return "DW_TAG_file_type";
12941 case DW_TAG_friend
:
12942 return "DW_TAG_friend";
12943 case DW_TAG_namelist
:
12944 return "DW_TAG_namelist";
12945 case DW_TAG_namelist_item
:
12946 return "DW_TAG_namelist_item";
12947 case DW_TAG_packed_type
:
12948 return "DW_TAG_packed_type";
12949 case DW_TAG_subprogram
:
12950 return "DW_TAG_subprogram";
12951 case DW_TAG_template_type_param
:
12952 return "DW_TAG_template_type_param";
12953 case DW_TAG_template_value_param
:
12954 return "DW_TAG_template_value_param";
12955 case DW_TAG_thrown_type
:
12956 return "DW_TAG_thrown_type";
12957 case DW_TAG_try_block
:
12958 return "DW_TAG_try_block";
12959 case DW_TAG_variant_part
:
12960 return "DW_TAG_variant_part";
12961 case DW_TAG_variable
:
12962 return "DW_TAG_variable";
12963 case DW_TAG_volatile_type
:
12964 return "DW_TAG_volatile_type";
12965 case DW_TAG_dwarf_procedure
:
12966 return "DW_TAG_dwarf_procedure";
12967 case DW_TAG_restrict_type
:
12968 return "DW_TAG_restrict_type";
12969 case DW_TAG_interface_type
:
12970 return "DW_TAG_interface_type";
12971 case DW_TAG_namespace
:
12972 return "DW_TAG_namespace";
12973 case DW_TAG_imported_module
:
12974 return "DW_TAG_imported_module";
12975 case DW_TAG_unspecified_type
:
12976 return "DW_TAG_unspecified_type";
12977 case DW_TAG_partial_unit
:
12978 return "DW_TAG_partial_unit";
12979 case DW_TAG_imported_unit
:
12980 return "DW_TAG_imported_unit";
12981 case DW_TAG_condition
:
12982 return "DW_TAG_condition";
12983 case DW_TAG_shared_type
:
12984 return "DW_TAG_shared_type";
12985 case DW_TAG_type_unit
:
12986 return "DW_TAG_type_unit";
12987 case DW_TAG_MIPS_loop
:
12988 return "DW_TAG_MIPS_loop";
12989 case DW_TAG_HP_array_descriptor
:
12990 return "DW_TAG_HP_array_descriptor";
12991 case DW_TAG_format_label
:
12992 return "DW_TAG_format_label";
12993 case DW_TAG_function_template
:
12994 return "DW_TAG_function_template";
12995 case DW_TAG_class_template
:
12996 return "DW_TAG_class_template";
12997 case DW_TAG_GNU_BINCL
:
12998 return "DW_TAG_GNU_BINCL";
12999 case DW_TAG_GNU_EINCL
:
13000 return "DW_TAG_GNU_EINCL";
13001 case DW_TAG_upc_shared_type
:
13002 return "DW_TAG_upc_shared_type";
13003 case DW_TAG_upc_strict_type
:
13004 return "DW_TAG_upc_strict_type";
13005 case DW_TAG_upc_relaxed_type
:
13006 return "DW_TAG_upc_relaxed_type";
13007 case DW_TAG_PGI_kanji_type
:
13008 return "DW_TAG_PGI_kanji_type";
13009 case DW_TAG_PGI_interface_block
:
13010 return "DW_TAG_PGI_interface_block";
13011 case DW_TAG_GNU_call_site
:
13012 return "DW_TAG_GNU_call_site";
13014 return "DW_TAG_<unknown>";
13018 /* Convert a DWARF attribute code into its string name. */
13021 dwarf_attr_name (unsigned attr
)
13025 case DW_AT_sibling
:
13026 return "DW_AT_sibling";
13027 case DW_AT_location
:
13028 return "DW_AT_location";
13030 return "DW_AT_name";
13031 case DW_AT_ordering
:
13032 return "DW_AT_ordering";
13033 case DW_AT_subscr_data
:
13034 return "DW_AT_subscr_data";
13035 case DW_AT_byte_size
:
13036 return "DW_AT_byte_size";
13037 case DW_AT_bit_offset
:
13038 return "DW_AT_bit_offset";
13039 case DW_AT_bit_size
:
13040 return "DW_AT_bit_size";
13041 case DW_AT_element_list
:
13042 return "DW_AT_element_list";
13043 case DW_AT_stmt_list
:
13044 return "DW_AT_stmt_list";
13046 return "DW_AT_low_pc";
13047 case DW_AT_high_pc
:
13048 return "DW_AT_high_pc";
13049 case DW_AT_language
:
13050 return "DW_AT_language";
13052 return "DW_AT_member";
13054 return "DW_AT_discr";
13055 case DW_AT_discr_value
:
13056 return "DW_AT_discr_value";
13057 case DW_AT_visibility
:
13058 return "DW_AT_visibility";
13060 return "DW_AT_import";
13061 case DW_AT_string_length
:
13062 return "DW_AT_string_length";
13063 case DW_AT_common_reference
:
13064 return "DW_AT_common_reference";
13065 case DW_AT_comp_dir
:
13066 return "DW_AT_comp_dir";
13067 case DW_AT_const_value
:
13068 return "DW_AT_const_value";
13069 case DW_AT_containing_type
:
13070 return "DW_AT_containing_type";
13071 case DW_AT_default_value
:
13072 return "DW_AT_default_value";
13074 return "DW_AT_inline";
13075 case DW_AT_is_optional
:
13076 return "DW_AT_is_optional";
13077 case DW_AT_lower_bound
:
13078 return "DW_AT_lower_bound";
13079 case DW_AT_producer
:
13080 return "DW_AT_producer";
13081 case DW_AT_prototyped
:
13082 return "DW_AT_prototyped";
13083 case DW_AT_return_addr
:
13084 return "DW_AT_return_addr";
13085 case DW_AT_start_scope
:
13086 return "DW_AT_start_scope";
13087 case DW_AT_bit_stride
:
13088 return "DW_AT_bit_stride";
13089 case DW_AT_upper_bound
:
13090 return "DW_AT_upper_bound";
13091 case DW_AT_abstract_origin
:
13092 return "DW_AT_abstract_origin";
13093 case DW_AT_accessibility
:
13094 return "DW_AT_accessibility";
13095 case DW_AT_address_class
:
13096 return "DW_AT_address_class";
13097 case DW_AT_artificial
:
13098 return "DW_AT_artificial";
13099 case DW_AT_base_types
:
13100 return "DW_AT_base_types";
13101 case DW_AT_calling_convention
:
13102 return "DW_AT_calling_convention";
13104 return "DW_AT_count";
13105 case DW_AT_data_member_location
:
13106 return "DW_AT_data_member_location";
13107 case DW_AT_decl_column
:
13108 return "DW_AT_decl_column";
13109 case DW_AT_decl_file
:
13110 return "DW_AT_decl_file";
13111 case DW_AT_decl_line
:
13112 return "DW_AT_decl_line";
13113 case DW_AT_declaration
:
13114 return "DW_AT_declaration";
13115 case DW_AT_discr_list
:
13116 return "DW_AT_discr_list";
13117 case DW_AT_encoding
:
13118 return "DW_AT_encoding";
13119 case DW_AT_external
:
13120 return "DW_AT_external";
13121 case DW_AT_frame_base
:
13122 return "DW_AT_frame_base";
13124 return "DW_AT_friend";
13125 case DW_AT_identifier_case
:
13126 return "DW_AT_identifier_case";
13127 case DW_AT_macro_info
:
13128 return "DW_AT_macro_info";
13129 case DW_AT_namelist_items
:
13130 return "DW_AT_namelist_items";
13131 case DW_AT_priority
:
13132 return "DW_AT_priority";
13133 case DW_AT_segment
:
13134 return "DW_AT_segment";
13135 case DW_AT_specification
:
13136 return "DW_AT_specification";
13137 case DW_AT_static_link
:
13138 return "DW_AT_static_link";
13140 return "DW_AT_type";
13141 case DW_AT_use_location
:
13142 return "DW_AT_use_location";
13143 case DW_AT_variable_parameter
:
13144 return "DW_AT_variable_parameter";
13145 case DW_AT_virtuality
:
13146 return "DW_AT_virtuality";
13147 case DW_AT_vtable_elem_location
:
13148 return "DW_AT_vtable_elem_location";
13149 /* DWARF 3 values. */
13150 case DW_AT_allocated
:
13151 return "DW_AT_allocated";
13152 case DW_AT_associated
:
13153 return "DW_AT_associated";
13154 case DW_AT_data_location
:
13155 return "DW_AT_data_location";
13156 case DW_AT_byte_stride
:
13157 return "DW_AT_byte_stride";
13158 case DW_AT_entry_pc
:
13159 return "DW_AT_entry_pc";
13160 case DW_AT_use_UTF8
:
13161 return "DW_AT_use_UTF8";
13162 case DW_AT_extension
:
13163 return "DW_AT_extension";
13165 return "DW_AT_ranges";
13166 case DW_AT_trampoline
:
13167 return "DW_AT_trampoline";
13168 case DW_AT_call_column
:
13169 return "DW_AT_call_column";
13170 case DW_AT_call_file
:
13171 return "DW_AT_call_file";
13172 case DW_AT_call_line
:
13173 return "DW_AT_call_line";
13174 case DW_AT_description
:
13175 return "DW_AT_description";
13176 case DW_AT_binary_scale
:
13177 return "DW_AT_binary_scale";
13178 case DW_AT_decimal_scale
:
13179 return "DW_AT_decimal_scale";
13181 return "DW_AT_small";
13182 case DW_AT_decimal_sign
:
13183 return "DW_AT_decimal_sign";
13184 case DW_AT_digit_count
:
13185 return "DW_AT_digit_count";
13186 case DW_AT_picture_string
:
13187 return "DW_AT_picture_string";
13188 case DW_AT_mutable
:
13189 return "DW_AT_mutable";
13190 case DW_AT_threads_scaled
:
13191 return "DW_AT_threads_scaled";
13192 case DW_AT_explicit
:
13193 return "DW_AT_explicit";
13194 case DW_AT_object_pointer
:
13195 return "DW_AT_object_pointer";
13196 case DW_AT_endianity
:
13197 return "DW_AT_endianity";
13198 case DW_AT_elemental
:
13199 return "DW_AT_elemental";
13201 return "DW_AT_pure";
13202 case DW_AT_recursive
:
13203 return "DW_AT_recursive";
13204 /* DWARF 4 values. */
13205 case DW_AT_signature
:
13206 return "DW_AT_signature";
13207 case DW_AT_linkage_name
:
13208 return "DW_AT_linkage_name";
13209 /* SGI/MIPS extensions. */
13210 #ifdef MIPS /* collides with DW_AT_HP_block_index */
13211 case DW_AT_MIPS_fde
:
13212 return "DW_AT_MIPS_fde";
13214 case DW_AT_MIPS_loop_begin
:
13215 return "DW_AT_MIPS_loop_begin";
13216 case DW_AT_MIPS_tail_loop_begin
:
13217 return "DW_AT_MIPS_tail_loop_begin";
13218 case DW_AT_MIPS_epilog_begin
:
13219 return "DW_AT_MIPS_epilog_begin";
13220 case DW_AT_MIPS_loop_unroll_factor
:
13221 return "DW_AT_MIPS_loop_unroll_factor";
13222 case DW_AT_MIPS_software_pipeline_depth
:
13223 return "DW_AT_MIPS_software_pipeline_depth";
13224 case DW_AT_MIPS_linkage_name
:
13225 return "DW_AT_MIPS_linkage_name";
13226 case DW_AT_MIPS_stride
:
13227 return "DW_AT_MIPS_stride";
13228 case DW_AT_MIPS_abstract_name
:
13229 return "DW_AT_MIPS_abstract_name";
13230 case DW_AT_MIPS_clone_origin
:
13231 return "DW_AT_MIPS_clone_origin";
13232 case DW_AT_MIPS_has_inlines
:
13233 return "DW_AT_MIPS_has_inlines";
13234 /* HP extensions. */
13235 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
13236 case DW_AT_HP_block_index
:
13237 return "DW_AT_HP_block_index";
13239 case DW_AT_HP_unmodifiable
:
13240 return "DW_AT_HP_unmodifiable";
13241 case DW_AT_HP_actuals_stmt_list
:
13242 return "DW_AT_HP_actuals_stmt_list";
13243 case DW_AT_HP_proc_per_section
:
13244 return "DW_AT_HP_proc_per_section";
13245 case DW_AT_HP_raw_data_ptr
:
13246 return "DW_AT_HP_raw_data_ptr";
13247 case DW_AT_HP_pass_by_reference
:
13248 return "DW_AT_HP_pass_by_reference";
13249 case DW_AT_HP_opt_level
:
13250 return "DW_AT_HP_opt_level";
13251 case DW_AT_HP_prof_version_id
:
13252 return "DW_AT_HP_prof_version_id";
13253 case DW_AT_HP_opt_flags
:
13254 return "DW_AT_HP_opt_flags";
13255 case DW_AT_HP_cold_region_low_pc
:
13256 return "DW_AT_HP_cold_region_low_pc";
13257 case DW_AT_HP_cold_region_high_pc
:
13258 return "DW_AT_HP_cold_region_high_pc";
13259 case DW_AT_HP_all_variables_modifiable
:
13260 return "DW_AT_HP_all_variables_modifiable";
13261 case DW_AT_HP_linkage_name
:
13262 return "DW_AT_HP_linkage_name";
13263 case DW_AT_HP_prof_flags
:
13264 return "DW_AT_HP_prof_flags";
13265 /* GNU extensions. */
13266 case DW_AT_sf_names
:
13267 return "DW_AT_sf_names";
13268 case DW_AT_src_info
:
13269 return "DW_AT_src_info";
13270 case DW_AT_mac_info
:
13271 return "DW_AT_mac_info";
13272 case DW_AT_src_coords
:
13273 return "DW_AT_src_coords";
13274 case DW_AT_body_begin
:
13275 return "DW_AT_body_begin";
13276 case DW_AT_body_end
:
13277 return "DW_AT_body_end";
13278 case DW_AT_GNU_vector
:
13279 return "DW_AT_GNU_vector";
13280 case DW_AT_GNU_odr_signature
:
13281 return "DW_AT_GNU_odr_signature";
13282 /* VMS extensions. */
13283 case DW_AT_VMS_rtnbeg_pd_address
:
13284 return "DW_AT_VMS_rtnbeg_pd_address";
13285 /* UPC extension. */
13286 case DW_AT_upc_threads_scaled
:
13287 return "DW_AT_upc_threads_scaled";
13288 /* PGI (STMicroelectronics) extensions. */
13289 case DW_AT_PGI_lbase
:
13290 return "DW_AT_PGI_lbase";
13291 case DW_AT_PGI_soffset
:
13292 return "DW_AT_PGI_soffset";
13293 case DW_AT_PGI_lstride
:
13294 return "DW_AT_PGI_lstride";
13296 return "DW_AT_<unknown>";
13300 /* Convert a DWARF value form code into its string name. */
13303 dwarf_form_name (unsigned form
)
13308 return "DW_FORM_addr";
13309 case DW_FORM_block2
:
13310 return "DW_FORM_block2";
13311 case DW_FORM_block4
:
13312 return "DW_FORM_block4";
13313 case DW_FORM_data2
:
13314 return "DW_FORM_data2";
13315 case DW_FORM_data4
:
13316 return "DW_FORM_data4";
13317 case DW_FORM_data8
:
13318 return "DW_FORM_data8";
13319 case DW_FORM_string
:
13320 return "DW_FORM_string";
13321 case DW_FORM_block
:
13322 return "DW_FORM_block";
13323 case DW_FORM_block1
:
13324 return "DW_FORM_block1";
13325 case DW_FORM_data1
:
13326 return "DW_FORM_data1";
13328 return "DW_FORM_flag";
13329 case DW_FORM_sdata
:
13330 return "DW_FORM_sdata";
13332 return "DW_FORM_strp";
13333 case DW_FORM_udata
:
13334 return "DW_FORM_udata";
13335 case DW_FORM_ref_addr
:
13336 return "DW_FORM_ref_addr";
13338 return "DW_FORM_ref1";
13340 return "DW_FORM_ref2";
13342 return "DW_FORM_ref4";
13344 return "DW_FORM_ref8";
13345 case DW_FORM_ref_udata
:
13346 return "DW_FORM_ref_udata";
13347 case DW_FORM_indirect
:
13348 return "DW_FORM_indirect";
13349 case DW_FORM_sec_offset
:
13350 return "DW_FORM_sec_offset";
13351 case DW_FORM_exprloc
:
13352 return "DW_FORM_exprloc";
13353 case DW_FORM_flag_present
:
13354 return "DW_FORM_flag_present";
13355 case DW_FORM_ref_sig8
:
13356 return "DW_FORM_ref_sig8";
13358 return "DW_FORM_<unknown>";
13362 /* Convert a DWARF stack opcode into its string name. */
13365 dwarf_stack_op_name (unsigned op
)
13370 return "DW_OP_addr";
13372 return "DW_OP_deref";
13373 case DW_OP_const1u
:
13374 return "DW_OP_const1u";
13375 case DW_OP_const1s
:
13376 return "DW_OP_const1s";
13377 case DW_OP_const2u
:
13378 return "DW_OP_const2u";
13379 case DW_OP_const2s
:
13380 return "DW_OP_const2s";
13381 case DW_OP_const4u
:
13382 return "DW_OP_const4u";
13383 case DW_OP_const4s
:
13384 return "DW_OP_const4s";
13385 case DW_OP_const8u
:
13386 return "DW_OP_const8u";
13387 case DW_OP_const8s
:
13388 return "DW_OP_const8s";
13390 return "DW_OP_constu";
13392 return "DW_OP_consts";
13394 return "DW_OP_dup";
13396 return "DW_OP_drop";
13398 return "DW_OP_over";
13400 return "DW_OP_pick";
13402 return "DW_OP_swap";
13404 return "DW_OP_rot";
13406 return "DW_OP_xderef";
13408 return "DW_OP_abs";
13410 return "DW_OP_and";
13412 return "DW_OP_div";
13414 return "DW_OP_minus";
13416 return "DW_OP_mod";
13418 return "DW_OP_mul";
13420 return "DW_OP_neg";
13422 return "DW_OP_not";
13426 return "DW_OP_plus";
13427 case DW_OP_plus_uconst
:
13428 return "DW_OP_plus_uconst";
13430 return "DW_OP_shl";
13432 return "DW_OP_shr";
13434 return "DW_OP_shra";
13436 return "DW_OP_xor";
13438 return "DW_OP_bra";
13452 return "DW_OP_skip";
13454 return "DW_OP_lit0";
13456 return "DW_OP_lit1";
13458 return "DW_OP_lit2";
13460 return "DW_OP_lit3";
13462 return "DW_OP_lit4";
13464 return "DW_OP_lit5";
13466 return "DW_OP_lit6";
13468 return "DW_OP_lit7";
13470 return "DW_OP_lit8";
13472 return "DW_OP_lit9";
13474 return "DW_OP_lit10";
13476 return "DW_OP_lit11";
13478 return "DW_OP_lit12";
13480 return "DW_OP_lit13";
13482 return "DW_OP_lit14";
13484 return "DW_OP_lit15";
13486 return "DW_OP_lit16";
13488 return "DW_OP_lit17";
13490 return "DW_OP_lit18";
13492 return "DW_OP_lit19";
13494 return "DW_OP_lit20";
13496 return "DW_OP_lit21";
13498 return "DW_OP_lit22";
13500 return "DW_OP_lit23";
13502 return "DW_OP_lit24";
13504 return "DW_OP_lit25";
13506 return "DW_OP_lit26";
13508 return "DW_OP_lit27";
13510 return "DW_OP_lit28";
13512 return "DW_OP_lit29";
13514 return "DW_OP_lit30";
13516 return "DW_OP_lit31";
13518 return "DW_OP_reg0";
13520 return "DW_OP_reg1";
13522 return "DW_OP_reg2";
13524 return "DW_OP_reg3";
13526 return "DW_OP_reg4";
13528 return "DW_OP_reg5";
13530 return "DW_OP_reg6";
13532 return "DW_OP_reg7";
13534 return "DW_OP_reg8";
13536 return "DW_OP_reg9";
13538 return "DW_OP_reg10";
13540 return "DW_OP_reg11";
13542 return "DW_OP_reg12";
13544 return "DW_OP_reg13";
13546 return "DW_OP_reg14";
13548 return "DW_OP_reg15";
13550 return "DW_OP_reg16";
13552 return "DW_OP_reg17";
13554 return "DW_OP_reg18";
13556 return "DW_OP_reg19";
13558 return "DW_OP_reg20";
13560 return "DW_OP_reg21";
13562 return "DW_OP_reg22";
13564 return "DW_OP_reg23";
13566 return "DW_OP_reg24";
13568 return "DW_OP_reg25";
13570 return "DW_OP_reg26";
13572 return "DW_OP_reg27";
13574 return "DW_OP_reg28";
13576 return "DW_OP_reg29";
13578 return "DW_OP_reg30";
13580 return "DW_OP_reg31";
13582 return "DW_OP_breg0";
13584 return "DW_OP_breg1";
13586 return "DW_OP_breg2";
13588 return "DW_OP_breg3";
13590 return "DW_OP_breg4";
13592 return "DW_OP_breg5";
13594 return "DW_OP_breg6";
13596 return "DW_OP_breg7";
13598 return "DW_OP_breg8";
13600 return "DW_OP_breg9";
13602 return "DW_OP_breg10";
13604 return "DW_OP_breg11";
13606 return "DW_OP_breg12";
13608 return "DW_OP_breg13";
13610 return "DW_OP_breg14";
13612 return "DW_OP_breg15";
13614 return "DW_OP_breg16";
13616 return "DW_OP_breg17";
13618 return "DW_OP_breg18";
13620 return "DW_OP_breg19";
13622 return "DW_OP_breg20";
13624 return "DW_OP_breg21";
13626 return "DW_OP_breg22";
13628 return "DW_OP_breg23";
13630 return "DW_OP_breg24";
13632 return "DW_OP_breg25";
13634 return "DW_OP_breg26";
13636 return "DW_OP_breg27";
13638 return "DW_OP_breg28";
13640 return "DW_OP_breg29";
13642 return "DW_OP_breg30";
13644 return "DW_OP_breg31";
13646 return "DW_OP_regx";
13648 return "DW_OP_fbreg";
13650 return "DW_OP_bregx";
13652 return "DW_OP_piece";
13653 case DW_OP_deref_size
:
13654 return "DW_OP_deref_size";
13655 case DW_OP_xderef_size
:
13656 return "DW_OP_xderef_size";
13658 return "DW_OP_nop";
13659 /* DWARF 3 extensions. */
13660 case DW_OP_push_object_address
:
13661 return "DW_OP_push_object_address";
13663 return "DW_OP_call2";
13665 return "DW_OP_call4";
13666 case DW_OP_call_ref
:
13667 return "DW_OP_call_ref";
13668 case DW_OP_form_tls_address
:
13669 return "DW_OP_form_tls_address";
13670 case DW_OP_call_frame_cfa
:
13671 return "DW_OP_call_frame_cfa";
13672 case DW_OP_bit_piece
:
13673 return "DW_OP_bit_piece";
13674 /* DWARF 4 extensions. */
13675 case DW_OP_implicit_value
:
13676 return "DW_OP_implicit_value";
13677 case DW_OP_stack_value
:
13678 return "DW_OP_stack_value";
13679 /* GNU extensions. */
13680 case DW_OP_GNU_push_tls_address
:
13681 return "DW_OP_GNU_push_tls_address";
13682 case DW_OP_GNU_uninit
:
13683 return "DW_OP_GNU_uninit";
13684 case DW_OP_GNU_implicit_pointer
:
13685 return "DW_OP_GNU_implicit_pointer";
13686 case DW_OP_GNU_entry_value
:
13687 return "DW_OP_GNU_entry_value";
13688 case DW_OP_GNU_const_type
:
13689 return "DW_OP_GNU_const_type";
13690 case DW_OP_GNU_regval_type
:
13691 return "DW_OP_GNU_regval_type";
13692 case DW_OP_GNU_deref_type
:
13693 return "DW_OP_GNU_deref_type";
13694 case DW_OP_GNU_convert
:
13695 return "DW_OP_GNU_convert";
13696 case DW_OP_GNU_reinterpret
:
13697 return "DW_OP_GNU_reinterpret";
13704 dwarf_bool_name (unsigned mybool
)
13712 /* Convert a DWARF type code into its string name. */
13715 dwarf_type_encoding_name (unsigned enc
)
13720 return "DW_ATE_void";
13721 case DW_ATE_address
:
13722 return "DW_ATE_address";
13723 case DW_ATE_boolean
:
13724 return "DW_ATE_boolean";
13725 case DW_ATE_complex_float
:
13726 return "DW_ATE_complex_float";
13728 return "DW_ATE_float";
13729 case DW_ATE_signed
:
13730 return "DW_ATE_signed";
13731 case DW_ATE_signed_char
:
13732 return "DW_ATE_signed_char";
13733 case DW_ATE_unsigned
:
13734 return "DW_ATE_unsigned";
13735 case DW_ATE_unsigned_char
:
13736 return "DW_ATE_unsigned_char";
13738 case DW_ATE_imaginary_float
:
13739 return "DW_ATE_imaginary_float";
13740 case DW_ATE_packed_decimal
:
13741 return "DW_ATE_packed_decimal";
13742 case DW_ATE_numeric_string
:
13743 return "DW_ATE_numeric_string";
13744 case DW_ATE_edited
:
13745 return "DW_ATE_edited";
13746 case DW_ATE_signed_fixed
:
13747 return "DW_ATE_signed_fixed";
13748 case DW_ATE_unsigned_fixed
:
13749 return "DW_ATE_unsigned_fixed";
13750 case DW_ATE_decimal_float
:
13751 return "DW_ATE_decimal_float";
13754 return "DW_ATE_UTF";
13755 /* HP extensions. */
13756 case DW_ATE_HP_float80
:
13757 return "DW_ATE_HP_float80";
13758 case DW_ATE_HP_complex_float80
:
13759 return "DW_ATE_HP_complex_float80";
13760 case DW_ATE_HP_float128
:
13761 return "DW_ATE_HP_float128";
13762 case DW_ATE_HP_complex_float128
:
13763 return "DW_ATE_HP_complex_float128";
13764 case DW_ATE_HP_floathpintel
:
13765 return "DW_ATE_HP_floathpintel";
13766 case DW_ATE_HP_imaginary_float80
:
13767 return "DW_ATE_HP_imaginary_float80";
13768 case DW_ATE_HP_imaginary_float128
:
13769 return "DW_ATE_HP_imaginary_float128";
13771 return "DW_ATE_<unknown>";
13775 /* Convert a DWARF call frame info operation to its string name. */
13779 dwarf_cfi_name (unsigned cfi_opc
)
13783 case DW_CFA_advance_loc
:
13784 return "DW_CFA_advance_loc";
13785 case DW_CFA_offset
:
13786 return "DW_CFA_offset";
13787 case DW_CFA_restore
:
13788 return "DW_CFA_restore";
13790 return "DW_CFA_nop";
13791 case DW_CFA_set_loc
:
13792 return "DW_CFA_set_loc";
13793 case DW_CFA_advance_loc1
:
13794 return "DW_CFA_advance_loc1";
13795 case DW_CFA_advance_loc2
:
13796 return "DW_CFA_advance_loc2";
13797 case DW_CFA_advance_loc4
:
13798 return "DW_CFA_advance_loc4";
13799 case DW_CFA_offset_extended
:
13800 return "DW_CFA_offset_extended";
13801 case DW_CFA_restore_extended
:
13802 return "DW_CFA_restore_extended";
13803 case DW_CFA_undefined
:
13804 return "DW_CFA_undefined";
13805 case DW_CFA_same_value
:
13806 return "DW_CFA_same_value";
13807 case DW_CFA_register
:
13808 return "DW_CFA_register";
13809 case DW_CFA_remember_state
:
13810 return "DW_CFA_remember_state";
13811 case DW_CFA_restore_state
:
13812 return "DW_CFA_restore_state";
13813 case DW_CFA_def_cfa
:
13814 return "DW_CFA_def_cfa";
13815 case DW_CFA_def_cfa_register
:
13816 return "DW_CFA_def_cfa_register";
13817 case DW_CFA_def_cfa_offset
:
13818 return "DW_CFA_def_cfa_offset";
13820 case DW_CFA_def_cfa_expression
:
13821 return "DW_CFA_def_cfa_expression";
13822 case DW_CFA_expression
:
13823 return "DW_CFA_expression";
13824 case DW_CFA_offset_extended_sf
:
13825 return "DW_CFA_offset_extended_sf";
13826 case DW_CFA_def_cfa_sf
:
13827 return "DW_CFA_def_cfa_sf";
13828 case DW_CFA_def_cfa_offset_sf
:
13829 return "DW_CFA_def_cfa_offset_sf";
13830 case DW_CFA_val_offset
:
13831 return "DW_CFA_val_offset";
13832 case DW_CFA_val_offset_sf
:
13833 return "DW_CFA_val_offset_sf";
13834 case DW_CFA_val_expression
:
13835 return "DW_CFA_val_expression";
13836 /* SGI/MIPS specific. */
13837 case DW_CFA_MIPS_advance_loc8
:
13838 return "DW_CFA_MIPS_advance_loc8";
13839 /* GNU extensions. */
13840 case DW_CFA_GNU_window_save
:
13841 return "DW_CFA_GNU_window_save";
13842 case DW_CFA_GNU_args_size
:
13843 return "DW_CFA_GNU_args_size";
13844 case DW_CFA_GNU_negative_offset_extended
:
13845 return "DW_CFA_GNU_negative_offset_extended";
13847 return "DW_CFA_<unknown>";
13853 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
13857 print_spaces (indent
, f
);
13858 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
13859 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
13861 if (die
->parent
!= NULL
)
13863 print_spaces (indent
, f
);
13864 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
13865 die
->parent
->offset
);
13868 print_spaces (indent
, f
);
13869 fprintf_unfiltered (f
, " has children: %s\n",
13870 dwarf_bool_name (die
->child
!= NULL
));
13872 print_spaces (indent
, f
);
13873 fprintf_unfiltered (f
, " attributes:\n");
13875 for (i
= 0; i
< die
->num_attrs
; ++i
)
13877 print_spaces (indent
, f
);
13878 fprintf_unfiltered (f
, " %s (%s) ",
13879 dwarf_attr_name (die
->attrs
[i
].name
),
13880 dwarf_form_name (die
->attrs
[i
].form
));
13882 switch (die
->attrs
[i
].form
)
13884 case DW_FORM_ref_addr
:
13886 fprintf_unfiltered (f
, "address: ");
13887 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
13889 case DW_FORM_block2
:
13890 case DW_FORM_block4
:
13891 case DW_FORM_block
:
13892 case DW_FORM_block1
:
13893 fprintf_unfiltered (f
, "block: size %d",
13894 DW_BLOCK (&die
->attrs
[i
])->size
);
13896 case DW_FORM_exprloc
:
13897 fprintf_unfiltered (f
, "expression: size %u",
13898 DW_BLOCK (&die
->attrs
[i
])->size
);
13903 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
13904 (long) (DW_ADDR (&die
->attrs
[i
])));
13906 case DW_FORM_data1
:
13907 case DW_FORM_data2
:
13908 case DW_FORM_data4
:
13909 case DW_FORM_data8
:
13910 case DW_FORM_udata
:
13911 case DW_FORM_sdata
:
13912 fprintf_unfiltered (f
, "constant: %s",
13913 pulongest (DW_UNSND (&die
->attrs
[i
])));
13915 case DW_FORM_sec_offset
:
13916 fprintf_unfiltered (f
, "section offset: %s",
13917 pulongest (DW_UNSND (&die
->attrs
[i
])));
13919 case DW_FORM_ref_sig8
:
13920 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
13921 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
13922 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
);
13924 fprintf_unfiltered (f
, "signatured type, offset: unknown");
13926 case DW_FORM_string
:
13928 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
13929 DW_STRING (&die
->attrs
[i
])
13930 ? DW_STRING (&die
->attrs
[i
]) : "",
13931 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
13934 if (DW_UNSND (&die
->attrs
[i
]))
13935 fprintf_unfiltered (f
, "flag: TRUE");
13937 fprintf_unfiltered (f
, "flag: FALSE");
13939 case DW_FORM_flag_present
:
13940 fprintf_unfiltered (f
, "flag: TRUE");
13942 case DW_FORM_indirect
:
13943 /* The reader will have reduced the indirect form to
13944 the "base form" so this form should not occur. */
13945 fprintf_unfiltered (f
,
13946 "unexpected attribute form: DW_FORM_indirect");
13949 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
13950 die
->attrs
[i
].form
);
13953 fprintf_unfiltered (f
, "\n");
13958 dump_die_for_error (struct die_info
*die
)
13960 dump_die_shallow (gdb_stderr
, 0, die
);
13964 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
13966 int indent
= level
* 4;
13968 gdb_assert (die
!= NULL
);
13970 if (level
>= max_level
)
13973 dump_die_shallow (f
, indent
, die
);
13975 if (die
->child
!= NULL
)
13977 print_spaces (indent
, f
);
13978 fprintf_unfiltered (f
, " Children:");
13979 if (level
+ 1 < max_level
)
13981 fprintf_unfiltered (f
, "\n");
13982 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
13986 fprintf_unfiltered (f
,
13987 " [not printed, max nesting level reached]\n");
13991 if (die
->sibling
!= NULL
&& level
> 0)
13993 dump_die_1 (f
, level
, max_level
, die
->sibling
);
13997 /* This is called from the pdie macro in gdbinit.in.
13998 It's not static so gcc will keep a copy callable from gdb. */
14001 dump_die (struct die_info
*die
, int max_level
)
14003 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
14007 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
14011 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
14017 is_ref_attr (struct attribute
*attr
)
14019 switch (attr
->form
)
14021 case DW_FORM_ref_addr
:
14026 case DW_FORM_ref_udata
:
14033 static unsigned int
14034 dwarf2_get_ref_die_offset (struct attribute
*attr
)
14036 if (is_ref_attr (attr
))
14037 return DW_ADDR (attr
);
14039 complaint (&symfile_complaints
,
14040 _("unsupported die ref attribute form: '%s'"),
14041 dwarf_form_name (attr
->form
));
14045 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
14046 * the value held by the attribute is not constant. */
14049 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
14051 if (attr
->form
== DW_FORM_sdata
)
14052 return DW_SND (attr
);
14053 else if (attr
->form
== DW_FORM_udata
14054 || attr
->form
== DW_FORM_data1
14055 || attr
->form
== DW_FORM_data2
14056 || attr
->form
== DW_FORM_data4
14057 || attr
->form
== DW_FORM_data8
)
14058 return DW_UNSND (attr
);
14061 complaint (&symfile_complaints
,
14062 _("Attribute value is not a constant (%s)"),
14063 dwarf_form_name (attr
->form
));
14064 return default_value
;
14068 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
14069 unit and add it to our queue.
14070 The result is non-zero if PER_CU was queued, otherwise the result is zero
14071 meaning either PER_CU is already queued or it is already loaded. */
14074 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
14075 struct dwarf2_per_cu_data
*per_cu
)
14077 /* We may arrive here during partial symbol reading, if we need full
14078 DIEs to process an unusual case (e.g. template arguments). Do
14079 not queue PER_CU, just tell our caller to load its DIEs. */
14080 if (dwarf2_per_objfile
->reading_partial_symbols
)
14082 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
14087 /* Mark the dependence relation so that we don't flush PER_CU
14089 dwarf2_add_dependence (this_cu
, per_cu
);
14091 /* If it's already on the queue, we have nothing to do. */
14092 if (per_cu
->queued
)
14095 /* If the compilation unit is already loaded, just mark it as
14097 if (per_cu
->cu
!= NULL
)
14099 per_cu
->cu
->last_used
= 0;
14103 /* Add it to the queue. */
14104 queue_comp_unit (per_cu
);
14109 /* Follow reference or signature attribute ATTR of SRC_DIE.
14110 On entry *REF_CU is the CU of SRC_DIE.
14111 On exit *REF_CU is the CU of the result. */
14113 static struct die_info
*
14114 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
14115 struct dwarf2_cu
**ref_cu
)
14117 struct die_info
*die
;
14119 if (is_ref_attr (attr
))
14120 die
= follow_die_ref (src_die
, attr
, ref_cu
);
14121 else if (attr
->form
== DW_FORM_ref_sig8
)
14122 die
= follow_die_sig (src_die
, attr
, ref_cu
);
14125 dump_die_for_error (src_die
);
14126 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
14127 (*ref_cu
)->objfile
->name
);
14133 /* Follow reference OFFSET.
14134 On entry *REF_CU is the CU of the source die referencing OFFSET.
14135 On exit *REF_CU is the CU of the result.
14136 Returns NULL if OFFSET is invalid. */
14138 static struct die_info
*
14139 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
14141 struct die_info temp_die
;
14142 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
14144 gdb_assert (cu
->per_cu
!= NULL
);
14148 if (cu
->per_cu
->debug_types_section
)
14150 /* .debug_types CUs cannot reference anything outside their CU.
14151 If they need to, they have to reference a signatured type via
14152 DW_FORM_ref_sig8. */
14153 if (! offset_in_cu_p (&cu
->header
, offset
))
14156 else if (! offset_in_cu_p (&cu
->header
, offset
))
14158 struct dwarf2_per_cu_data
*per_cu
;
14160 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
14162 /* If necessary, add it to the queue and load its DIEs. */
14163 if (maybe_queue_comp_unit (cu
, per_cu
))
14164 load_full_comp_unit (per_cu
);
14166 target_cu
= per_cu
->cu
;
14168 else if (cu
->dies
== NULL
)
14170 /* We're loading full DIEs during partial symbol reading. */
14171 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
14172 load_full_comp_unit (cu
->per_cu
);
14175 *ref_cu
= target_cu
;
14176 temp_die
.offset
= offset
;
14177 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
14180 /* Follow reference attribute ATTR of SRC_DIE.
14181 On entry *REF_CU is the CU of SRC_DIE.
14182 On exit *REF_CU is the CU of the result. */
14184 static struct die_info
*
14185 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
14186 struct dwarf2_cu
**ref_cu
)
14188 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
14189 struct dwarf2_cu
*cu
= *ref_cu
;
14190 struct die_info
*die
;
14192 die
= follow_die_offset (offset
, ref_cu
);
14194 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
14195 "at 0x%x [in module %s]"),
14196 offset
, src_die
->offset
, cu
->objfile
->name
);
14201 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
14202 Returned value is intended for DW_OP_call*. Returned
14203 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
14205 struct dwarf2_locexpr_baton
14206 dwarf2_fetch_die_location_block (unsigned int offset_in_cu
,
14207 struct dwarf2_per_cu_data
*per_cu
,
14208 CORE_ADDR (*get_frame_pc
) (void *baton
),
14211 unsigned int offset
= per_cu
->offset
+ offset_in_cu
;
14212 struct dwarf2_cu
*cu
;
14213 struct die_info
*die
;
14214 struct attribute
*attr
;
14215 struct dwarf2_locexpr_baton retval
;
14217 dw2_setup (per_cu
->objfile
);
14219 if (per_cu
->cu
== NULL
)
14223 die
= follow_die_offset (offset
, &cu
);
14225 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
14226 offset
, per_cu
->objfile
->name
);
14228 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14231 /* DWARF: "If there is no such attribute, then there is no effect.".
14232 DATA is ignored if SIZE is 0. */
14234 retval
.data
= NULL
;
14237 else if (attr_form_is_section_offset (attr
))
14239 struct dwarf2_loclist_baton loclist_baton
;
14240 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
14243 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
14245 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
14247 retval
.size
= size
;
14251 if (!attr_form_is_block (attr
))
14252 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
14253 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
14254 offset
, per_cu
->objfile
->name
);
14256 retval
.data
= DW_BLOCK (attr
)->data
;
14257 retval
.size
= DW_BLOCK (attr
)->size
;
14259 retval
.per_cu
= cu
->per_cu
;
14261 age_cached_comp_units ();
14266 /* Return the type of the DIE at DIE_OFFSET in the CU named by
14270 dwarf2_get_die_type (unsigned int die_offset
,
14271 struct dwarf2_per_cu_data
*per_cu
)
14273 dw2_setup (per_cu
->objfile
);
14274 return get_die_type_at_offset (per_cu
->offset
+ die_offset
, per_cu
);
14277 /* Follow the signature attribute ATTR in SRC_DIE.
14278 On entry *REF_CU is the CU of SRC_DIE.
14279 On exit *REF_CU is the CU of the result. */
14281 static struct die_info
*
14282 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
14283 struct dwarf2_cu
**ref_cu
)
14285 struct objfile
*objfile
= (*ref_cu
)->objfile
;
14286 struct die_info temp_die
;
14287 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
14288 struct dwarf2_cu
*sig_cu
;
14289 struct die_info
*die
;
14291 /* sig_type will be NULL if the signatured type is missing from
14293 if (sig_type
== NULL
)
14294 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
14295 "at 0x%x [in module %s]"),
14296 src_die
->offset
, objfile
->name
);
14298 /* If necessary, add it to the queue and load its DIEs. */
14300 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
14301 read_signatured_type (sig_type
);
14303 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
14305 sig_cu
= sig_type
->per_cu
.cu
;
14306 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
14307 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
14314 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
14315 "from DIE at 0x%x [in module %s]"),
14316 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
14319 /* Given an offset of a signatured type, return its signatured_type. */
14321 static struct signatured_type
*
14322 lookup_signatured_type_at_offset (struct objfile
*objfile
,
14323 struct dwarf2_section_info
*section
,
14324 unsigned int offset
)
14326 gdb_byte
*info_ptr
= section
->buffer
+ offset
;
14327 unsigned int length
, initial_length_size
;
14328 unsigned int sig_offset
;
14329 struct signatured_type find_entry
, *type_sig
;
14331 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
14332 sig_offset
= (initial_length_size
14334 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
14335 + 1 /*address_size*/);
14336 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
14337 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
14339 /* This is only used to lookup previously recorded types.
14340 If we didn't find it, it's our bug. */
14341 gdb_assert (type_sig
!= NULL
);
14342 gdb_assert (offset
== type_sig
->per_cu
.offset
);
14347 /* Load the DIEs associated with type unit PER_CU into memory. */
14350 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
14352 struct objfile
*objfile
= per_cu
->objfile
;
14353 struct dwarf2_section_info
*sect
= per_cu
->debug_types_section
;
14354 unsigned int offset
= per_cu
->offset
;
14355 struct signatured_type
*type_sig
;
14357 dwarf2_read_section (objfile
, sect
);
14359 /* We have the section offset, but we need the signature to do the
14360 hash table lookup. */
14361 /* FIXME: This is sorta unnecessary, read_signatured_type only uses
14362 the signature to assert we found the right one.
14363 Ok, but it's a lot of work. We should simplify things so any needed
14364 assert doesn't require all this clumsiness. */
14365 type_sig
= lookup_signatured_type_at_offset (objfile
, sect
, offset
);
14367 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
14369 read_signatured_type (type_sig
);
14371 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
14374 /* Read in a signatured type and build its CU and DIEs. */
14377 read_signatured_type (struct signatured_type
*type_sig
)
14379 struct objfile
*objfile
= type_sig
->per_cu
.objfile
;
14380 gdb_byte
*types_ptr
;
14381 struct die_reader_specs reader_specs
;
14382 struct dwarf2_cu
*cu
;
14383 ULONGEST signature
;
14384 struct cleanup
*back_to
, *free_cu_cleanup
;
14385 struct dwarf2_section_info
*section
= type_sig
->per_cu
.debug_types_section
;
14387 dwarf2_read_section (objfile
, section
);
14388 types_ptr
= section
->buffer
+ type_sig
->per_cu
.offset
;
14390 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
14392 cu
= xmalloc (sizeof (*cu
));
14393 init_one_comp_unit (cu
, &type_sig
->per_cu
);
14395 /* If an error occurs while loading, release our storage. */
14396 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
14398 types_ptr
= read_and_check_type_unit_head (&cu
->header
, section
, types_ptr
,
14400 gdb_assert (signature
== type_sig
->signature
);
14403 = htab_create_alloc_ex (cu
->header
.length
/ 12,
14407 &cu
->comp_unit_obstack
,
14408 hashtab_obstack_allocate
,
14409 dummy_obstack_deallocate
);
14411 dwarf2_read_abbrevs (cu
);
14412 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
14414 init_cu_die_reader (&reader_specs
, cu
);
14416 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
14419 /* We try not to read any attributes in this function, because not
14420 all CUs needed for references have been loaded yet, and symbol
14421 table processing isn't initialized. But we have to set the CU language,
14422 or we won't be able to build types correctly. */
14423 prepare_one_comp_unit (cu
, cu
->dies
);
14425 do_cleanups (back_to
);
14427 /* We've successfully allocated this compilation unit. Let our caller
14428 clean it up when finished with it. */
14429 discard_cleanups (free_cu_cleanup
);
14431 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
14432 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
14435 /* Decode simple location descriptions.
14436 Given a pointer to a dwarf block that defines a location, compute
14437 the location and return the value.
14439 NOTE drow/2003-11-18: This function is called in two situations
14440 now: for the address of static or global variables (partial symbols
14441 only) and for offsets into structures which are expected to be
14442 (more or less) constant. The partial symbol case should go away,
14443 and only the constant case should remain. That will let this
14444 function complain more accurately. A few special modes are allowed
14445 without complaint for global variables (for instance, global
14446 register values and thread-local values).
14448 A location description containing no operations indicates that the
14449 object is optimized out. The return value is 0 for that case.
14450 FIXME drow/2003-11-16: No callers check for this case any more; soon all
14451 callers will only want a very basic result and this can become a
14454 Note that stack[0] is unused except as a default error return. */
14457 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
14459 struct objfile
*objfile
= cu
->objfile
;
14461 int size
= blk
->size
;
14462 gdb_byte
*data
= blk
->data
;
14463 CORE_ADDR stack
[64];
14465 unsigned int bytes_read
, unsnd
;
14471 stack
[++stacki
] = 0;
14510 stack
[++stacki
] = op
- DW_OP_lit0
;
14545 stack
[++stacki
] = op
- DW_OP_reg0
;
14547 dwarf2_complex_location_expr_complaint ();
14551 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
14553 stack
[++stacki
] = unsnd
;
14555 dwarf2_complex_location_expr_complaint ();
14559 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
14564 case DW_OP_const1u
:
14565 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
14569 case DW_OP_const1s
:
14570 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
14574 case DW_OP_const2u
:
14575 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
14579 case DW_OP_const2s
:
14580 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
14584 case DW_OP_const4u
:
14585 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
14589 case DW_OP_const4s
:
14590 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
14594 case DW_OP_const8u
:
14595 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
14600 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
14606 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
14611 stack
[stacki
+ 1] = stack
[stacki
];
14616 stack
[stacki
- 1] += stack
[stacki
];
14620 case DW_OP_plus_uconst
:
14621 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
14627 stack
[stacki
- 1] -= stack
[stacki
];
14632 /* If we're not the last op, then we definitely can't encode
14633 this using GDB's address_class enum. This is valid for partial
14634 global symbols, although the variable's address will be bogus
14637 dwarf2_complex_location_expr_complaint ();
14640 case DW_OP_GNU_push_tls_address
:
14641 /* The top of the stack has the offset from the beginning
14642 of the thread control block at which the variable is located. */
14643 /* Nothing should follow this operator, so the top of stack would
14645 /* This is valid for partial global symbols, but the variable's
14646 address will be bogus in the psymtab. Make it always at least
14647 non-zero to not look as a variable garbage collected by linker
14648 which have DW_OP_addr 0. */
14650 dwarf2_complex_location_expr_complaint ();
14654 case DW_OP_GNU_uninit
:
14659 const char *name
= dwarf_stack_op_name (op
);
14662 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
14665 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
14669 return (stack
[stacki
]);
14672 /* Enforce maximum stack depth of SIZE-1 to avoid writing
14673 outside of the allocated space. Also enforce minimum>0. */
14674 if (stacki
>= ARRAY_SIZE (stack
) - 1)
14676 complaint (&symfile_complaints
,
14677 _("location description stack overflow"));
14683 complaint (&symfile_complaints
,
14684 _("location description stack underflow"));
14688 return (stack
[stacki
]);
14691 /* memory allocation interface */
14693 static struct dwarf_block
*
14694 dwarf_alloc_block (struct dwarf2_cu
*cu
)
14696 struct dwarf_block
*blk
;
14698 blk
= (struct dwarf_block
*)
14699 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
14703 static struct abbrev_info
*
14704 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
14706 struct abbrev_info
*abbrev
;
14708 abbrev
= (struct abbrev_info
*)
14709 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
14710 memset (abbrev
, 0, sizeof (struct abbrev_info
));
14714 static struct die_info
*
14715 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
14717 struct die_info
*die
;
14718 size_t size
= sizeof (struct die_info
);
14721 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
14723 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
14724 memset (die
, 0, sizeof (struct die_info
));
14729 /* Macro support. */
14731 /* Return the full name of file number I in *LH's file name table.
14732 Use COMP_DIR as the name of the current directory of the
14733 compilation. The result is allocated using xmalloc; the caller is
14734 responsible for freeing it. */
14736 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
14738 /* Is the file number a valid index into the line header's file name
14739 table? Remember that file numbers start with one, not zero. */
14740 if (1 <= file
&& file
<= lh
->num_file_names
)
14742 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
14744 if (IS_ABSOLUTE_PATH (fe
->name
))
14745 return xstrdup (fe
->name
);
14753 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14759 dir_len
= strlen (dir
);
14760 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
14761 strcpy (full_name
, dir
);
14762 full_name
[dir_len
] = '/';
14763 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
14767 return xstrdup (fe
->name
);
14772 /* The compiler produced a bogus file number. We can at least
14773 record the macro definitions made in the file, even if we
14774 won't be able to find the file by name. */
14775 char fake_name
[80];
14777 sprintf (fake_name
, "<bad macro file number %d>", file
);
14779 complaint (&symfile_complaints
,
14780 _("bad file number in macro information (%d)"),
14783 return xstrdup (fake_name
);
14788 static struct macro_source_file
*
14789 macro_start_file (int file
, int line
,
14790 struct macro_source_file
*current_file
,
14791 const char *comp_dir
,
14792 struct line_header
*lh
, struct objfile
*objfile
)
14794 /* The full name of this source file. */
14795 char *full_name
= file_full_name (file
, lh
, comp_dir
);
14797 /* We don't create a macro table for this compilation unit
14798 at all until we actually get a filename. */
14799 if (! pending_macros
)
14800 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
14801 objfile
->macro_cache
);
14803 if (! current_file
)
14804 /* If we have no current file, then this must be the start_file
14805 directive for the compilation unit's main source file. */
14806 current_file
= macro_set_main (pending_macros
, full_name
);
14808 current_file
= macro_include (current_file
, line
, full_name
);
14812 return current_file
;
14816 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
14817 followed by a null byte. */
14819 copy_string (const char *buf
, int len
)
14821 char *s
= xmalloc (len
+ 1);
14823 memcpy (s
, buf
, len
);
14829 static const char *
14830 consume_improper_spaces (const char *p
, const char *body
)
14834 complaint (&symfile_complaints
,
14835 _("macro definition contains spaces "
14836 "in formal argument list:\n`%s'"),
14848 parse_macro_definition (struct macro_source_file
*file
, int line
,
14853 /* The body string takes one of two forms. For object-like macro
14854 definitions, it should be:
14856 <macro name> " " <definition>
14858 For function-like macro definitions, it should be:
14860 <macro name> "() " <definition>
14862 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
14864 Spaces may appear only where explicitly indicated, and in the
14867 The Dwarf 2 spec says that an object-like macro's name is always
14868 followed by a space, but versions of GCC around March 2002 omit
14869 the space when the macro's definition is the empty string.
14871 The Dwarf 2 spec says that there should be no spaces between the
14872 formal arguments in a function-like macro's formal argument list,
14873 but versions of GCC around March 2002 include spaces after the
14877 /* Find the extent of the macro name. The macro name is terminated
14878 by either a space or null character (for an object-like macro) or
14879 an opening paren (for a function-like macro). */
14880 for (p
= body
; *p
; p
++)
14881 if (*p
== ' ' || *p
== '(')
14884 if (*p
== ' ' || *p
== '\0')
14886 /* It's an object-like macro. */
14887 int name_len
= p
- body
;
14888 char *name
= copy_string (body
, name_len
);
14889 const char *replacement
;
14892 replacement
= body
+ name_len
+ 1;
14895 dwarf2_macro_malformed_definition_complaint (body
);
14896 replacement
= body
+ name_len
;
14899 macro_define_object (file
, line
, name
, replacement
);
14903 else if (*p
== '(')
14905 /* It's a function-like macro. */
14906 char *name
= copy_string (body
, p
- body
);
14909 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
14913 p
= consume_improper_spaces (p
, body
);
14915 /* Parse the formal argument list. */
14916 while (*p
&& *p
!= ')')
14918 /* Find the extent of the current argument name. */
14919 const char *arg_start
= p
;
14921 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
14924 if (! *p
|| p
== arg_start
)
14925 dwarf2_macro_malformed_definition_complaint (body
);
14928 /* Make sure argv has room for the new argument. */
14929 if (argc
>= argv_size
)
14932 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
14935 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
14938 p
= consume_improper_spaces (p
, body
);
14940 /* Consume the comma, if present. */
14945 p
= consume_improper_spaces (p
, body
);
14954 /* Perfectly formed definition, no complaints. */
14955 macro_define_function (file
, line
, name
,
14956 argc
, (const char **) argv
,
14958 else if (*p
== '\0')
14960 /* Complain, but do define it. */
14961 dwarf2_macro_malformed_definition_complaint (body
);
14962 macro_define_function (file
, line
, name
,
14963 argc
, (const char **) argv
,
14967 /* Just complain. */
14968 dwarf2_macro_malformed_definition_complaint (body
);
14971 /* Just complain. */
14972 dwarf2_macro_malformed_definition_complaint (body
);
14978 for (i
= 0; i
< argc
; i
++)
14984 dwarf2_macro_malformed_definition_complaint (body
);
14987 /* Skip some bytes from BYTES according to the form given in FORM.
14988 Returns the new pointer. */
14991 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
,
14992 enum dwarf_form form
,
14993 unsigned int offset_size
,
14994 struct dwarf2_section_info
*section
)
14996 unsigned int bytes_read
;
15000 case DW_FORM_data1
:
15005 case DW_FORM_data2
:
15009 case DW_FORM_data4
:
15013 case DW_FORM_data8
:
15017 case DW_FORM_string
:
15018 read_direct_string (abfd
, bytes
, &bytes_read
);
15019 bytes
+= bytes_read
;
15022 case DW_FORM_sec_offset
:
15024 bytes
+= offset_size
;
15027 case DW_FORM_block
:
15028 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
15029 bytes
+= bytes_read
;
15032 case DW_FORM_block1
:
15033 bytes
+= 1 + read_1_byte (abfd
, bytes
);
15035 case DW_FORM_block2
:
15036 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
15038 case DW_FORM_block4
:
15039 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
15042 case DW_FORM_sdata
:
15043 case DW_FORM_udata
:
15044 bytes
= skip_leb128 (abfd
, bytes
);
15050 complaint (&symfile_complaints
,
15051 _("invalid form 0x%x in `%s'"),
15053 section
->asection
->name
);
15061 /* A helper for dwarf_decode_macros that handles skipping an unknown
15062 opcode. Returns an updated pointer to the macro data buffer; or,
15063 on error, issues a complaint and returns NULL. */
15066 skip_unknown_opcode (unsigned int opcode
,
15067 gdb_byte
**opcode_definitions
,
15070 unsigned int offset_size
,
15071 struct dwarf2_section_info
*section
)
15073 unsigned int bytes_read
, i
;
15077 if (opcode_definitions
[opcode
] == NULL
)
15079 complaint (&symfile_complaints
,
15080 _("unrecognized DW_MACFINO opcode 0x%x"),
15085 defn
= opcode_definitions
[opcode
];
15086 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
15087 defn
+= bytes_read
;
15089 for (i
= 0; i
< arg
; ++i
)
15091 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, defn
[i
], offset_size
, section
);
15092 if (mac_ptr
== NULL
)
15094 /* skip_form_bytes already issued the complaint. */
15102 /* A helper function which parses the header of a macro section.
15103 If the macro section is the extended (for now called "GNU") type,
15104 then this updates *OFFSET_SIZE. Returns a pointer to just after
15105 the header, or issues a complaint and returns NULL on error. */
15108 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
15111 unsigned int *offset_size
,
15112 int section_is_gnu
)
15114 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
15116 if (section_is_gnu
)
15118 unsigned int version
, flags
;
15120 version
= read_2_bytes (abfd
, mac_ptr
);
15123 complaint (&symfile_complaints
,
15124 _("unrecognized version `%d' in .debug_macro section"),
15130 flags
= read_1_byte (abfd
, mac_ptr
);
15132 *offset_size
= (flags
& 1) ? 8 : 4;
15134 if ((flags
& 2) != 0)
15135 /* We don't need the line table offset. */
15136 mac_ptr
+= *offset_size
;
15138 /* Vendor opcode descriptions. */
15139 if ((flags
& 4) != 0)
15141 unsigned int i
, count
;
15143 count
= read_1_byte (abfd
, mac_ptr
);
15145 for (i
= 0; i
< count
; ++i
)
15147 unsigned int opcode
, bytes_read
;
15150 opcode
= read_1_byte (abfd
, mac_ptr
);
15152 opcode_definitions
[opcode
] = mac_ptr
;
15153 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15154 mac_ptr
+= bytes_read
;
15163 /* A helper for dwarf_decode_macros that handles the GNU extensions,
15164 including DW_MACRO_GNU_transparent_include. */
15167 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
15168 struct macro_source_file
*current_file
,
15169 struct line_header
*lh
, char *comp_dir
,
15170 struct dwarf2_section_info
*section
,
15171 int section_is_gnu
,
15172 unsigned int offset_size
,
15173 struct objfile
*objfile
,
15174 htab_t include_hash
)
15176 enum dwarf_macro_record_type macinfo_type
;
15177 int at_commandline
;
15178 gdb_byte
*opcode_definitions
[256];
15180 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
15181 &offset_size
, section_is_gnu
);
15182 if (mac_ptr
== NULL
)
15184 /* We already issued a complaint. */
15188 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
15189 GDB is still reading the definitions from command line. First
15190 DW_MACINFO_start_file will need to be ignored as it was already executed
15191 to create CURRENT_FILE for the main source holding also the command line
15192 definitions. On first met DW_MACINFO_start_file this flag is reset to
15193 normally execute all the remaining DW_MACINFO_start_file macinfos. */
15195 at_commandline
= 1;
15199 /* Do we at least have room for a macinfo type byte? */
15200 if (mac_ptr
>= mac_end
)
15202 dwarf2_macros_too_long_complaint (section
);
15206 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
15209 /* Note that we rely on the fact that the corresponding GNU and
15210 DWARF constants are the same. */
15211 switch (macinfo_type
)
15213 /* A zero macinfo type indicates the end of the macro
15218 case DW_MACRO_GNU_define
:
15219 case DW_MACRO_GNU_undef
:
15220 case DW_MACRO_GNU_define_indirect
:
15221 case DW_MACRO_GNU_undef_indirect
:
15223 unsigned int bytes_read
;
15228 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15229 mac_ptr
+= bytes_read
;
15231 if (macinfo_type
== DW_MACRO_GNU_define
15232 || macinfo_type
== DW_MACRO_GNU_undef
)
15234 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15235 mac_ptr
+= bytes_read
;
15239 LONGEST str_offset
;
15241 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
15242 mac_ptr
+= offset_size
;
15244 body
= read_indirect_string_at_offset (abfd
, str_offset
);
15247 is_define
= (macinfo_type
== DW_MACRO_GNU_define
15248 || macinfo_type
== DW_MACRO_GNU_define_indirect
);
15249 if (! current_file
)
15251 /* DWARF violation as no main source is present. */
15252 complaint (&symfile_complaints
,
15253 _("debug info with no main source gives macro %s "
15255 is_define
? _("definition") : _("undefinition"),
15259 if ((line
== 0 && !at_commandline
)
15260 || (line
!= 0 && at_commandline
))
15261 complaint (&symfile_complaints
,
15262 _("debug info gives %s macro %s with %s line %d: %s"),
15263 at_commandline
? _("command-line") : _("in-file"),
15264 is_define
? _("definition") : _("undefinition"),
15265 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
15268 parse_macro_definition (current_file
, line
, body
);
15271 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
15272 || macinfo_type
== DW_MACRO_GNU_undef_indirect
);
15273 macro_undef (current_file
, line
, body
);
15278 case DW_MACRO_GNU_start_file
:
15280 unsigned int bytes_read
;
15283 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15284 mac_ptr
+= bytes_read
;
15285 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15286 mac_ptr
+= bytes_read
;
15288 if ((line
== 0 && !at_commandline
)
15289 || (line
!= 0 && at_commandline
))
15290 complaint (&symfile_complaints
,
15291 _("debug info gives source %d included "
15292 "from %s at %s line %d"),
15293 file
, at_commandline
? _("command-line") : _("file"),
15294 line
== 0 ? _("zero") : _("non-zero"), line
);
15296 if (at_commandline
)
15298 /* This DW_MACRO_GNU_start_file was executed in the
15300 at_commandline
= 0;
15303 current_file
= macro_start_file (file
, line
,
15304 current_file
, comp_dir
,
15309 case DW_MACRO_GNU_end_file
:
15310 if (! current_file
)
15311 complaint (&symfile_complaints
,
15312 _("macro debug info has an unmatched "
15313 "`close_file' directive"));
15316 current_file
= current_file
->included_by
;
15317 if (! current_file
)
15319 enum dwarf_macro_record_type next_type
;
15321 /* GCC circa March 2002 doesn't produce the zero
15322 type byte marking the end of the compilation
15323 unit. Complain if it's not there, but exit no
15326 /* Do we at least have room for a macinfo type byte? */
15327 if (mac_ptr
>= mac_end
)
15329 dwarf2_macros_too_long_complaint (section
);
15333 /* We don't increment mac_ptr here, so this is just
15335 next_type
= read_1_byte (abfd
, mac_ptr
);
15336 if (next_type
!= 0)
15337 complaint (&symfile_complaints
,
15338 _("no terminating 0-type entry for "
15339 "macros in `.debug_macinfo' section"));
15346 case DW_MACRO_GNU_transparent_include
:
15351 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
15352 mac_ptr
+= offset_size
;
15354 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
15357 /* This has actually happened; see
15358 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
15359 complaint (&symfile_complaints
,
15360 _("recursive DW_MACRO_GNU_transparent_include in "
15361 ".debug_macro section"));
15367 dwarf_decode_macro_bytes (abfd
,
15368 section
->buffer
+ offset
,
15369 mac_end
, current_file
,
15371 section
, section_is_gnu
,
15372 offset_size
, objfile
, include_hash
);
15374 htab_remove_elt (include_hash
, mac_ptr
);
15379 case DW_MACINFO_vendor_ext
:
15380 if (!section_is_gnu
)
15382 unsigned int bytes_read
;
15385 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15386 mac_ptr
+= bytes_read
;
15387 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15388 mac_ptr
+= bytes_read
;
15390 /* We don't recognize any vendor extensions. */
15396 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
15397 mac_ptr
, abfd
, offset_size
,
15399 if (mac_ptr
== NULL
)
15403 } while (macinfo_type
!= 0);
15407 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
15408 char *comp_dir
, bfd
*abfd
,
15409 struct dwarf2_cu
*cu
,
15410 struct dwarf2_section_info
*section
,
15411 int section_is_gnu
)
15413 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15414 gdb_byte
*mac_ptr
, *mac_end
;
15415 struct macro_source_file
*current_file
= 0;
15416 enum dwarf_macro_record_type macinfo_type
;
15417 unsigned int offset_size
= cu
->header
.offset_size
;
15418 gdb_byte
*opcode_definitions
[256];
15419 struct cleanup
*cleanup
;
15420 htab_t include_hash
;
15423 dwarf2_read_section (objfile
, section
);
15424 if (section
->buffer
== NULL
)
15426 complaint (&symfile_complaints
, _("missing %s section"),
15427 section
->asection
->name
);
15431 /* First pass: Find the name of the base filename.
15432 This filename is needed in order to process all macros whose definition
15433 (or undefinition) comes from the command line. These macros are defined
15434 before the first DW_MACINFO_start_file entry, and yet still need to be
15435 associated to the base file.
15437 To determine the base file name, we scan the macro definitions until we
15438 reach the first DW_MACINFO_start_file entry. We then initialize
15439 CURRENT_FILE accordingly so that any macro definition found before the
15440 first DW_MACINFO_start_file can still be associated to the base file. */
15442 mac_ptr
= section
->buffer
+ offset
;
15443 mac_end
= section
->buffer
+ section
->size
;
15445 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
15446 &offset_size
, section_is_gnu
);
15447 if (mac_ptr
== NULL
)
15449 /* We already issued a complaint. */
15455 /* Do we at least have room for a macinfo type byte? */
15456 if (mac_ptr
>= mac_end
)
15458 /* Complaint is printed during the second pass as GDB will probably
15459 stop the first pass earlier upon finding
15460 DW_MACINFO_start_file. */
15464 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
15467 /* Note that we rely on the fact that the corresponding GNU and
15468 DWARF constants are the same. */
15469 switch (macinfo_type
)
15471 /* A zero macinfo type indicates the end of the macro
15476 case DW_MACRO_GNU_define
:
15477 case DW_MACRO_GNU_undef
:
15478 /* Only skip the data by MAC_PTR. */
15480 unsigned int bytes_read
;
15482 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15483 mac_ptr
+= bytes_read
;
15484 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15485 mac_ptr
+= bytes_read
;
15489 case DW_MACRO_GNU_start_file
:
15491 unsigned int bytes_read
;
15494 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15495 mac_ptr
+= bytes_read
;
15496 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15497 mac_ptr
+= bytes_read
;
15499 current_file
= macro_start_file (file
, line
, current_file
,
15500 comp_dir
, lh
, objfile
);
15504 case DW_MACRO_GNU_end_file
:
15505 /* No data to skip by MAC_PTR. */
15508 case DW_MACRO_GNU_define_indirect
:
15509 case DW_MACRO_GNU_undef_indirect
:
15511 unsigned int bytes_read
;
15513 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15514 mac_ptr
+= bytes_read
;
15515 mac_ptr
+= offset_size
;
15519 case DW_MACRO_GNU_transparent_include
:
15520 /* Note that, according to the spec, a transparent include
15521 chain cannot call DW_MACRO_GNU_start_file. So, we can just
15522 skip this opcode. */
15523 mac_ptr
+= offset_size
;
15526 case DW_MACINFO_vendor_ext
:
15527 /* Only skip the data by MAC_PTR. */
15528 if (!section_is_gnu
)
15530 unsigned int bytes_read
;
15532 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15533 mac_ptr
+= bytes_read
;
15534 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15535 mac_ptr
+= bytes_read
;
15540 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
15541 mac_ptr
, abfd
, offset_size
,
15543 if (mac_ptr
== NULL
)
15547 } while (macinfo_type
!= 0 && current_file
== NULL
);
15549 /* Second pass: Process all entries.
15551 Use the AT_COMMAND_LINE flag to determine whether we are still processing
15552 command-line macro definitions/undefinitions. This flag is unset when we
15553 reach the first DW_MACINFO_start_file entry. */
15555 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
15556 NULL
, xcalloc
, xfree
);
15557 cleanup
= make_cleanup_htab_delete (include_hash
);
15558 mac_ptr
= section
->buffer
+ offset
;
15559 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
15561 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
15562 current_file
, lh
, comp_dir
, section
, section_is_gnu
,
15563 offset_size
, objfile
, include_hash
);
15564 do_cleanups (cleanup
);
15567 /* Check if the attribute's form is a DW_FORM_block*
15568 if so return true else false. */
15570 attr_form_is_block (struct attribute
*attr
)
15572 return (attr
== NULL
? 0 :
15573 attr
->form
== DW_FORM_block1
15574 || attr
->form
== DW_FORM_block2
15575 || attr
->form
== DW_FORM_block4
15576 || attr
->form
== DW_FORM_block
15577 || attr
->form
== DW_FORM_exprloc
);
15580 /* Return non-zero if ATTR's value is a section offset --- classes
15581 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
15582 You may use DW_UNSND (attr) to retrieve such offsets.
15584 Section 7.5.4, "Attribute Encodings", explains that no attribute
15585 may have a value that belongs to more than one of these classes; it
15586 would be ambiguous if we did, because we use the same forms for all
15589 attr_form_is_section_offset (struct attribute
*attr
)
15591 return (attr
->form
== DW_FORM_data4
15592 || attr
->form
== DW_FORM_data8
15593 || attr
->form
== DW_FORM_sec_offset
);
15597 /* Return non-zero if ATTR's value falls in the 'constant' class, or
15598 zero otherwise. When this function returns true, you can apply
15599 dwarf2_get_attr_constant_value to it.
15601 However, note that for some attributes you must check
15602 attr_form_is_section_offset before using this test. DW_FORM_data4
15603 and DW_FORM_data8 are members of both the constant class, and of
15604 the classes that contain offsets into other debug sections
15605 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
15606 that, if an attribute's can be either a constant or one of the
15607 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
15608 taken as section offsets, not constants. */
15610 attr_form_is_constant (struct attribute
*attr
)
15612 switch (attr
->form
)
15614 case DW_FORM_sdata
:
15615 case DW_FORM_udata
:
15616 case DW_FORM_data1
:
15617 case DW_FORM_data2
:
15618 case DW_FORM_data4
:
15619 case DW_FORM_data8
:
15626 /* A helper function that fills in a dwarf2_loclist_baton. */
15629 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
15630 struct dwarf2_loclist_baton
*baton
,
15631 struct attribute
*attr
)
15633 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
15634 &dwarf2_per_objfile
->loc
);
15636 baton
->per_cu
= cu
->per_cu
;
15637 gdb_assert (baton
->per_cu
);
15638 /* We don't know how long the location list is, but make sure we
15639 don't run off the edge of the section. */
15640 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
15641 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
15642 baton
->base_address
= cu
->base_address
;
15646 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
15647 struct dwarf2_cu
*cu
)
15649 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15651 if (attr_form_is_section_offset (attr
)
15652 /* ".debug_loc" may not exist at all, or the offset may be outside
15653 the section. If so, fall through to the complaint in the
15655 && DW_UNSND (attr
) < dwarf2_section_size (objfile
,
15656 &dwarf2_per_objfile
->loc
))
15658 struct dwarf2_loclist_baton
*baton
;
15660 baton
= obstack_alloc (&objfile
->objfile_obstack
,
15661 sizeof (struct dwarf2_loclist_baton
));
15663 fill_in_loclist_baton (cu
, baton
, attr
);
15665 if (cu
->base_known
== 0)
15666 complaint (&symfile_complaints
,
15667 _("Location list used without "
15668 "specifying the CU base address."));
15670 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
15671 SYMBOL_LOCATION_BATON (sym
) = baton
;
15675 struct dwarf2_locexpr_baton
*baton
;
15677 baton
= obstack_alloc (&objfile
->objfile_obstack
,
15678 sizeof (struct dwarf2_locexpr_baton
));
15679 baton
->per_cu
= cu
->per_cu
;
15680 gdb_assert (baton
->per_cu
);
15682 if (attr_form_is_block (attr
))
15684 /* Note that we're just copying the block's data pointer
15685 here, not the actual data. We're still pointing into the
15686 info_buffer for SYM's objfile; right now we never release
15687 that buffer, but when we do clean up properly this may
15689 baton
->size
= DW_BLOCK (attr
)->size
;
15690 baton
->data
= DW_BLOCK (attr
)->data
;
15694 dwarf2_invalid_attrib_class_complaint ("location description",
15695 SYMBOL_NATURAL_NAME (sym
));
15699 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
15700 SYMBOL_LOCATION_BATON (sym
) = baton
;
15704 /* Return the OBJFILE associated with the compilation unit CU. If CU
15705 came from a separate debuginfo file, then the master objfile is
15709 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
15711 struct objfile
*objfile
= per_cu
->objfile
;
15713 /* Return the master objfile, so that we can report and look up the
15714 correct file containing this variable. */
15715 if (objfile
->separate_debug_objfile_backlink
)
15716 objfile
= objfile
->separate_debug_objfile_backlink
;
15721 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
15722 (CU_HEADERP is unused in such case) or prepare a temporary copy at
15723 CU_HEADERP first. */
15725 static const struct comp_unit_head
*
15726 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
15727 struct dwarf2_per_cu_data
*per_cu
)
15729 struct objfile
*objfile
;
15730 struct dwarf2_per_objfile
*per_objfile
;
15731 gdb_byte
*info_ptr
;
15734 return &per_cu
->cu
->header
;
15736 objfile
= per_cu
->objfile
;
15737 per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15738 info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
15740 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
15741 read_comp_unit_head (cu_headerp
, info_ptr
, objfile
->obfd
);
15746 /* Return the address size given in the compilation unit header for CU. */
15749 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
15751 struct comp_unit_head cu_header_local
;
15752 const struct comp_unit_head
*cu_headerp
;
15754 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15756 return cu_headerp
->addr_size
;
15759 /* Return the offset size given in the compilation unit header for CU. */
15762 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
15764 struct comp_unit_head cu_header_local
;
15765 const struct comp_unit_head
*cu_headerp
;
15767 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15769 return cu_headerp
->offset_size
;
15772 /* See its dwarf2loc.h declaration. */
15775 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
15777 struct comp_unit_head cu_header_local
;
15778 const struct comp_unit_head
*cu_headerp
;
15780 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15782 if (cu_headerp
->version
== 2)
15783 return cu_headerp
->addr_size
;
15785 return cu_headerp
->offset_size
;
15788 /* Return the text offset of the CU. The returned offset comes from
15789 this CU's objfile. If this objfile came from a separate debuginfo
15790 file, then the offset may be different from the corresponding
15791 offset in the parent objfile. */
15794 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
15796 struct objfile
*objfile
= per_cu
->objfile
;
15798 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15801 /* Locate the .debug_info compilation unit from CU's objfile which contains
15802 the DIE at OFFSET. Raises an error on failure. */
15804 static struct dwarf2_per_cu_data
*
15805 dwarf2_find_containing_comp_unit (unsigned int offset
,
15806 struct objfile
*objfile
)
15808 struct dwarf2_per_cu_data
*this_cu
;
15812 high
= dwarf2_per_objfile
->n_comp_units
- 1;
15815 int mid
= low
+ (high
- low
) / 2;
15817 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
15822 gdb_assert (low
== high
);
15823 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
15826 error (_("Dwarf Error: could not find partial DIE containing "
15827 "offset 0x%lx [in module %s]"),
15828 (long) offset
, bfd_get_filename (objfile
->obfd
));
15830 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
15831 return dwarf2_per_objfile
->all_comp_units
[low
-1];
15835 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
15836 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
15837 && offset
>= this_cu
->offset
+ this_cu
->length
)
15838 error (_("invalid dwarf2 offset %u"), offset
);
15839 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
15844 /* Initialize dwarf2_cu CU, owned by PER_CU. */
15847 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
15849 memset (cu
, 0, sizeof (*cu
));
15851 cu
->per_cu
= per_cu
;
15852 cu
->objfile
= per_cu
->objfile
;
15853 obstack_init (&cu
->comp_unit_obstack
);
15856 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
15859 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
15861 struct attribute
*attr
;
15863 /* Set the language we're debugging. */
15864 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
15866 set_cu_language (DW_UNSND (attr
), cu
);
15869 cu
->language
= language_minimal
;
15870 cu
->language_defn
= language_def (cu
->language
);
15874 /* Release one cached compilation unit, CU. We unlink it from the tree
15875 of compilation units, but we don't remove it from the read_in_chain;
15876 the caller is responsible for that.
15877 NOTE: DATA is a void * because this function is also used as a
15878 cleanup routine. */
15881 free_heap_comp_unit (void *data
)
15883 struct dwarf2_cu
*cu
= data
;
15885 gdb_assert (cu
->per_cu
!= NULL
);
15886 cu
->per_cu
->cu
= NULL
;
15889 obstack_free (&cu
->comp_unit_obstack
, NULL
);
15894 /* This cleanup function is passed the address of a dwarf2_cu on the stack
15895 when we're finished with it. We can't free the pointer itself, but be
15896 sure to unlink it from the cache. Also release any associated storage
15897 and perform cache maintenance.
15899 Only used during partial symbol parsing. */
15902 free_stack_comp_unit (void *data
)
15904 struct dwarf2_cu
*cu
= data
;
15906 gdb_assert (cu
->per_cu
!= NULL
);
15907 cu
->per_cu
->cu
= NULL
;
15910 obstack_free (&cu
->comp_unit_obstack
, NULL
);
15911 cu
->partial_dies
= NULL
;
15913 /* The previous code only did this if per_cu != NULL.
15914 But that would always succeed, so now we just unconditionally do
15915 the aging. This seems like the wrong place to do such aging,
15916 but cleaning that up is left for later. */
15917 age_cached_comp_units ();
15920 /* Free all cached compilation units. */
15923 free_cached_comp_units (void *data
)
15925 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
15927 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15928 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
15929 while (per_cu
!= NULL
)
15931 struct dwarf2_per_cu_data
*next_cu
;
15933 next_cu
= per_cu
->cu
->read_in_chain
;
15935 free_heap_comp_unit (per_cu
->cu
);
15936 *last_chain
= next_cu
;
15942 /* Increase the age counter on each cached compilation unit, and free
15943 any that are too old. */
15946 age_cached_comp_units (void)
15948 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
15950 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
15951 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15952 while (per_cu
!= NULL
)
15954 per_cu
->cu
->last_used
++;
15955 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
15956 dwarf2_mark (per_cu
->cu
);
15957 per_cu
= per_cu
->cu
->read_in_chain
;
15960 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15961 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
15962 while (per_cu
!= NULL
)
15964 struct dwarf2_per_cu_data
*next_cu
;
15966 next_cu
= per_cu
->cu
->read_in_chain
;
15968 if (!per_cu
->cu
->mark
)
15970 free_heap_comp_unit (per_cu
->cu
);
15971 *last_chain
= next_cu
;
15974 last_chain
= &per_cu
->cu
->read_in_chain
;
15980 /* Remove a single compilation unit from the cache. */
15983 free_one_cached_comp_unit (void *target_cu
)
15985 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
15987 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15988 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
15989 while (per_cu
!= NULL
)
15991 struct dwarf2_per_cu_data
*next_cu
;
15993 next_cu
= per_cu
->cu
->read_in_chain
;
15995 if (per_cu
->cu
== target_cu
)
15997 free_heap_comp_unit (per_cu
->cu
);
15998 *last_chain
= next_cu
;
16002 last_chain
= &per_cu
->cu
->read_in_chain
;
16008 /* Release all extra memory associated with OBJFILE. */
16011 dwarf2_free_objfile (struct objfile
*objfile
)
16013 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
16015 if (dwarf2_per_objfile
== NULL
)
16018 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
16019 free_cached_comp_units (NULL
);
16021 if (dwarf2_per_objfile
->quick_file_names_table
)
16022 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
16024 /* Everything else should be on the objfile obstack. */
16027 /* A pair of DIE offset and GDB type pointer. We store these
16028 in a hash table separate from the DIEs, and preserve them
16029 when the DIEs are flushed out of cache. */
16031 struct dwarf2_offset_and_type
16033 unsigned int offset
;
16037 /* Hash function for a dwarf2_offset_and_type. */
16040 offset_and_type_hash (const void *item
)
16042 const struct dwarf2_offset_and_type
*ofs
= item
;
16044 return ofs
->offset
;
16047 /* Equality function for a dwarf2_offset_and_type. */
16050 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
16052 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
16053 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
16055 return ofs_lhs
->offset
== ofs_rhs
->offset
;
16058 /* Set the type associated with DIE to TYPE. Save it in CU's hash
16059 table if necessary. For convenience, return TYPE.
16061 The DIEs reading must have careful ordering to:
16062 * Not cause infite loops trying to read in DIEs as a prerequisite for
16063 reading current DIE.
16064 * Not trying to dereference contents of still incompletely read in types
16065 while reading in other DIEs.
16066 * Enable referencing still incompletely read in types just by a pointer to
16067 the type without accessing its fields.
16069 Therefore caller should follow these rules:
16070 * Try to fetch any prerequisite types we may need to build this DIE type
16071 before building the type and calling set_die_type.
16072 * After building type call set_die_type for current DIE as soon as
16073 possible before fetching more types to complete the current type.
16074 * Make the type as complete as possible before fetching more types. */
16076 static struct type
*
16077 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16079 struct dwarf2_offset_and_type
**slot
, ofs
;
16080 struct objfile
*objfile
= cu
->objfile
;
16081 htab_t
*type_hash_ptr
;
16083 /* For Ada types, make sure that the gnat-specific data is always
16084 initialized (if not already set). There are a few types where
16085 we should not be doing so, because the type-specific area is
16086 already used to hold some other piece of info (eg: TYPE_CODE_FLT
16087 where the type-specific area is used to store the floatformat).
16088 But this is not a problem, because the gnat-specific information
16089 is actually not needed for these types. */
16090 if (need_gnat_info (cu
)
16091 && TYPE_CODE (type
) != TYPE_CODE_FUNC
16092 && TYPE_CODE (type
) != TYPE_CODE_FLT
16093 && !HAVE_GNAT_AUX_INFO (type
))
16094 INIT_GNAT_SPECIFIC (type
);
16096 if (cu
->per_cu
->debug_types_section
)
16097 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
16099 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
16101 if (*type_hash_ptr
== NULL
)
16104 = htab_create_alloc_ex (127,
16105 offset_and_type_hash
,
16106 offset_and_type_eq
,
16108 &objfile
->objfile_obstack
,
16109 hashtab_obstack_allocate
,
16110 dummy_obstack_deallocate
);
16113 ofs
.offset
= die
->offset
;
16115 slot
= (struct dwarf2_offset_and_type
**)
16116 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
16118 complaint (&symfile_complaints
,
16119 _("A problem internal to GDB: DIE 0x%x has type already set"),
16121 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
16126 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
16127 table, or return NULL if the die does not have a saved type. */
16129 static struct type
*
16130 get_die_type_at_offset (unsigned int offset
,
16131 struct dwarf2_per_cu_data
*per_cu
)
16133 struct dwarf2_offset_and_type
*slot
, ofs
;
16136 if (per_cu
->debug_types_section
)
16137 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
16139 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
16140 if (type_hash
== NULL
)
16143 ofs
.offset
= offset
;
16144 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
16151 /* Look up the type for DIE in the appropriate type_hash table,
16152 or return NULL if DIE does not have a saved type. */
16154 static struct type
*
16155 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16157 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
16160 /* Add a dependence relationship from CU to REF_PER_CU. */
16163 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
16164 struct dwarf2_per_cu_data
*ref_per_cu
)
16168 if (cu
->dependencies
== NULL
)
16170 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
16171 NULL
, &cu
->comp_unit_obstack
,
16172 hashtab_obstack_allocate
,
16173 dummy_obstack_deallocate
);
16175 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
16177 *slot
= ref_per_cu
;
16180 /* Subroutine of dwarf2_mark to pass to htab_traverse.
16181 Set the mark field in every compilation unit in the
16182 cache that we must keep because we are keeping CU. */
16185 dwarf2_mark_helper (void **slot
, void *data
)
16187 struct dwarf2_per_cu_data
*per_cu
;
16189 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
16191 /* cu->dependencies references may not yet have been ever read if QUIT aborts
16192 reading of the chain. As such dependencies remain valid it is not much
16193 useful to track and undo them during QUIT cleanups. */
16194 if (per_cu
->cu
== NULL
)
16197 if (per_cu
->cu
->mark
)
16199 per_cu
->cu
->mark
= 1;
16201 if (per_cu
->cu
->dependencies
!= NULL
)
16202 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
16207 /* Set the mark field in CU and in every other compilation unit in the
16208 cache that we must keep because we are keeping CU. */
16211 dwarf2_mark (struct dwarf2_cu
*cu
)
16216 if (cu
->dependencies
!= NULL
)
16217 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
16221 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
16225 per_cu
->cu
->mark
= 0;
16226 per_cu
= per_cu
->cu
->read_in_chain
;
16230 /* Trivial hash function for partial_die_info: the hash value of a DIE
16231 is its offset in .debug_info for this objfile. */
16234 partial_die_hash (const void *item
)
16236 const struct partial_die_info
*part_die
= item
;
16238 return part_die
->offset
;
16241 /* Trivial comparison function for partial_die_info structures: two DIEs
16242 are equal if they have the same offset. */
16245 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
16247 const struct partial_die_info
*part_die_lhs
= item_lhs
;
16248 const struct partial_die_info
*part_die_rhs
= item_rhs
;
16250 return part_die_lhs
->offset
== part_die_rhs
->offset
;
16253 static struct cmd_list_element
*set_dwarf2_cmdlist
;
16254 static struct cmd_list_element
*show_dwarf2_cmdlist
;
16257 set_dwarf2_cmd (char *args
, int from_tty
)
16259 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
16263 show_dwarf2_cmd (char *args
, int from_tty
)
16265 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
16268 /* If section described by INFO was mmapped, munmap it now. */
16271 munmap_section_buffer (struct dwarf2_section_info
*info
)
16273 if (info
->map_addr
!= NULL
)
16278 res
= munmap (info
->map_addr
, info
->map_len
);
16279 gdb_assert (res
== 0);
16281 /* Without HAVE_MMAP, we should never be here to begin with. */
16282 gdb_assert_not_reached ("no mmap support");
16287 /* munmap debug sections for OBJFILE, if necessary. */
16290 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
16292 struct dwarf2_per_objfile
*data
= d
;
16294 struct dwarf2_section_info
*section
;
16296 /* This is sorted according to the order they're defined in to make it easier
16297 to keep in sync. */
16298 munmap_section_buffer (&data
->info
);
16299 munmap_section_buffer (&data
->abbrev
);
16300 munmap_section_buffer (&data
->line
);
16301 munmap_section_buffer (&data
->loc
);
16302 munmap_section_buffer (&data
->macinfo
);
16303 munmap_section_buffer (&data
->macro
);
16304 munmap_section_buffer (&data
->str
);
16305 munmap_section_buffer (&data
->ranges
);
16306 munmap_section_buffer (&data
->frame
);
16307 munmap_section_buffer (&data
->eh_frame
);
16308 munmap_section_buffer (&data
->gdb_index
);
16311 VEC_iterate (dwarf2_section_info_def
, data
->types
, ix
, section
);
16313 munmap_section_buffer (section
);
16315 VEC_free (dwarf2_section_info_def
, data
->types
);
16319 /* The "save gdb-index" command. */
16321 /* The contents of the hash table we create when building the string
16323 struct strtab_entry
16325 offset_type offset
;
16329 /* Hash function for a strtab_entry.
16331 Function is used only during write_hash_table so no index format backward
16332 compatibility is needed. */
16335 hash_strtab_entry (const void *e
)
16337 const struct strtab_entry
*entry
= e
;
16338 return mapped_index_string_hash (INT_MAX
, entry
->str
);
16341 /* Equality function for a strtab_entry. */
16344 eq_strtab_entry (const void *a
, const void *b
)
16346 const struct strtab_entry
*ea
= a
;
16347 const struct strtab_entry
*eb
= b
;
16348 return !strcmp (ea
->str
, eb
->str
);
16351 /* Create a strtab_entry hash table. */
16354 create_strtab (void)
16356 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
16357 xfree
, xcalloc
, xfree
);
16360 /* Add a string to the constant pool. Return the string's offset in
16364 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
16367 struct strtab_entry entry
;
16368 struct strtab_entry
*result
;
16371 slot
= htab_find_slot (table
, &entry
, INSERT
);
16376 result
= XNEW (struct strtab_entry
);
16377 result
->offset
= obstack_object_size (cpool
);
16379 obstack_grow_str0 (cpool
, str
);
16382 return result
->offset
;
16385 /* An entry in the symbol table. */
16386 struct symtab_index_entry
16388 /* The name of the symbol. */
16390 /* The offset of the name in the constant pool. */
16391 offset_type index_offset
;
16392 /* A sorted vector of the indices of all the CUs that hold an object
16394 VEC (offset_type
) *cu_indices
;
16397 /* The symbol table. This is a power-of-2-sized hash table. */
16398 struct mapped_symtab
16400 offset_type n_elements
;
16402 struct symtab_index_entry
**data
;
16405 /* Hash function for a symtab_index_entry. */
16408 hash_symtab_entry (const void *e
)
16410 const struct symtab_index_entry
*entry
= e
;
16411 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
16412 sizeof (offset_type
) * VEC_length (offset_type
,
16413 entry
->cu_indices
),
16417 /* Equality function for a symtab_index_entry. */
16420 eq_symtab_entry (const void *a
, const void *b
)
16422 const struct symtab_index_entry
*ea
= a
;
16423 const struct symtab_index_entry
*eb
= b
;
16424 int len
= VEC_length (offset_type
, ea
->cu_indices
);
16425 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
16427 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
16428 VEC_address (offset_type
, eb
->cu_indices
),
16429 sizeof (offset_type
) * len
);
16432 /* Destroy a symtab_index_entry. */
16435 delete_symtab_entry (void *p
)
16437 struct symtab_index_entry
*entry
= p
;
16438 VEC_free (offset_type
, entry
->cu_indices
);
16442 /* Create a hash table holding symtab_index_entry objects. */
16445 create_symbol_hash_table (void)
16447 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
16448 delete_symtab_entry
, xcalloc
, xfree
);
16451 /* Create a new mapped symtab object. */
16453 static struct mapped_symtab
*
16454 create_mapped_symtab (void)
16456 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
16457 symtab
->n_elements
= 0;
16458 symtab
->size
= 1024;
16459 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
16463 /* Destroy a mapped_symtab. */
16466 cleanup_mapped_symtab (void *p
)
16468 struct mapped_symtab
*symtab
= p
;
16469 /* The contents of the array are freed when the other hash table is
16471 xfree (symtab
->data
);
16475 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
16478 Function is used only during write_hash_table so no index format backward
16479 compatibility is needed. */
16481 static struct symtab_index_entry
**
16482 find_slot (struct mapped_symtab
*symtab
, const char *name
)
16484 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
16486 index
= hash
& (symtab
->size
- 1);
16487 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
16491 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
16492 return &symtab
->data
[index
];
16493 index
= (index
+ step
) & (symtab
->size
- 1);
16497 /* Expand SYMTAB's hash table. */
16500 hash_expand (struct mapped_symtab
*symtab
)
16502 offset_type old_size
= symtab
->size
;
16504 struct symtab_index_entry
**old_entries
= symtab
->data
;
16507 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
16509 for (i
= 0; i
< old_size
; ++i
)
16511 if (old_entries
[i
])
16513 struct symtab_index_entry
**slot
= find_slot (symtab
,
16514 old_entries
[i
]->name
);
16515 *slot
= old_entries
[i
];
16519 xfree (old_entries
);
16522 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
16523 is the index of the CU in which the symbol appears. */
16526 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
16527 offset_type cu_index
)
16529 struct symtab_index_entry
**slot
;
16531 ++symtab
->n_elements
;
16532 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
16533 hash_expand (symtab
);
16535 slot
= find_slot (symtab
, name
);
16538 *slot
= XNEW (struct symtab_index_entry
);
16539 (*slot
)->name
= name
;
16540 (*slot
)->cu_indices
= NULL
;
16542 /* Don't push an index twice. Due to how we add entries we only
16543 have to check the last one. */
16544 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
16545 || VEC_last (offset_type
, (*slot
)->cu_indices
) != cu_index
)
16546 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
16549 /* Add a vector of indices to the constant pool. */
16552 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
16553 struct symtab_index_entry
*entry
)
16557 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
16560 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
16561 offset_type val
= MAYBE_SWAP (len
);
16566 entry
->index_offset
= obstack_object_size (cpool
);
16568 obstack_grow (cpool
, &val
, sizeof (val
));
16570 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
16573 val
= MAYBE_SWAP (iter
);
16574 obstack_grow (cpool
, &val
, sizeof (val
));
16579 struct symtab_index_entry
*old_entry
= *slot
;
16580 entry
->index_offset
= old_entry
->index_offset
;
16583 return entry
->index_offset
;
16586 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
16587 constant pool entries going into the obstack CPOOL. */
16590 write_hash_table (struct mapped_symtab
*symtab
,
16591 struct obstack
*output
, struct obstack
*cpool
)
16594 htab_t symbol_hash_table
;
16597 symbol_hash_table
= create_symbol_hash_table ();
16598 str_table
= create_strtab ();
16600 /* We add all the index vectors to the constant pool first, to
16601 ensure alignment is ok. */
16602 for (i
= 0; i
< symtab
->size
; ++i
)
16604 if (symtab
->data
[i
])
16605 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
16608 /* Now write out the hash table. */
16609 for (i
= 0; i
< symtab
->size
; ++i
)
16611 offset_type str_off
, vec_off
;
16613 if (symtab
->data
[i
])
16615 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
16616 vec_off
= symtab
->data
[i
]->index_offset
;
16620 /* While 0 is a valid constant pool index, it is not valid
16621 to have 0 for both offsets. */
16626 str_off
= MAYBE_SWAP (str_off
);
16627 vec_off
= MAYBE_SWAP (vec_off
);
16629 obstack_grow (output
, &str_off
, sizeof (str_off
));
16630 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
16633 htab_delete (str_table
);
16634 htab_delete (symbol_hash_table
);
16637 /* Struct to map psymtab to CU index in the index file. */
16638 struct psymtab_cu_index_map
16640 struct partial_symtab
*psymtab
;
16641 unsigned int cu_index
;
16645 hash_psymtab_cu_index (const void *item
)
16647 const struct psymtab_cu_index_map
*map
= item
;
16649 return htab_hash_pointer (map
->psymtab
);
16653 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
16655 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
16656 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
16658 return lhs
->psymtab
== rhs
->psymtab
;
16661 /* Helper struct for building the address table. */
16662 struct addrmap_index_data
16664 struct objfile
*objfile
;
16665 struct obstack
*addr_obstack
;
16666 htab_t cu_index_htab
;
16668 /* Non-zero if the previous_* fields are valid.
16669 We can't write an entry until we see the next entry (since it is only then
16670 that we know the end of the entry). */
16671 int previous_valid
;
16672 /* Index of the CU in the table of all CUs in the index file. */
16673 unsigned int previous_cu_index
;
16674 /* Start address of the CU. */
16675 CORE_ADDR previous_cu_start
;
16678 /* Write an address entry to OBSTACK. */
16681 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
16682 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
16684 offset_type cu_index_to_write
;
16686 CORE_ADDR baseaddr
;
16688 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
16690 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
16691 obstack_grow (obstack
, addr
, 8);
16692 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
16693 obstack_grow (obstack
, addr
, 8);
16694 cu_index_to_write
= MAYBE_SWAP (cu_index
);
16695 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
16698 /* Worker function for traversing an addrmap to build the address table. */
16701 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
16703 struct addrmap_index_data
*data
= datap
;
16704 struct partial_symtab
*pst
= obj
;
16705 offset_type cu_index
;
16708 if (data
->previous_valid
)
16709 add_address_entry (data
->objfile
, data
->addr_obstack
,
16710 data
->previous_cu_start
, start_addr
,
16711 data
->previous_cu_index
);
16713 data
->previous_cu_start
= start_addr
;
16716 struct psymtab_cu_index_map find_map
, *map
;
16717 find_map
.psymtab
= pst
;
16718 map
= htab_find (data
->cu_index_htab
, &find_map
);
16719 gdb_assert (map
!= NULL
);
16720 data
->previous_cu_index
= map
->cu_index
;
16721 data
->previous_valid
= 1;
16724 data
->previous_valid
= 0;
16729 /* Write OBJFILE's address map to OBSTACK.
16730 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
16731 in the index file. */
16734 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
16735 htab_t cu_index_htab
)
16737 struct addrmap_index_data addrmap_index_data
;
16739 /* When writing the address table, we have to cope with the fact that
16740 the addrmap iterator only provides the start of a region; we have to
16741 wait until the next invocation to get the start of the next region. */
16743 addrmap_index_data
.objfile
= objfile
;
16744 addrmap_index_data
.addr_obstack
= obstack
;
16745 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
16746 addrmap_index_data
.previous_valid
= 0;
16748 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
16749 &addrmap_index_data
);
16751 /* It's highly unlikely the last entry (end address = 0xff...ff)
16752 is valid, but we should still handle it.
16753 The end address is recorded as the start of the next region, but that
16754 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
16756 if (addrmap_index_data
.previous_valid
)
16757 add_address_entry (objfile
, obstack
,
16758 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
16759 addrmap_index_data
.previous_cu_index
);
16762 /* Add a list of partial symbols to SYMTAB. */
16765 write_psymbols (struct mapped_symtab
*symtab
,
16767 struct partial_symbol
**psymp
,
16769 offset_type cu_index
,
16772 for (; count
-- > 0; ++psymp
)
16774 void **slot
, *lookup
;
16776 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
16777 error (_("Ada is not currently supported by the index"));
16779 /* We only want to add a given psymbol once. However, we also
16780 want to account for whether it is global or static. So, we
16781 may add it twice, using slightly different values. */
16784 uintptr_t val
= 1 | (uintptr_t) *psymp
;
16786 lookup
= (void *) val
;
16791 /* Only add a given psymbol once. */
16792 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
16796 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (*psymp
), cu_index
);
16801 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
16802 exception if there is an error. */
16805 write_obstack (FILE *file
, struct obstack
*obstack
)
16807 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
16809 != obstack_object_size (obstack
))
16810 error (_("couldn't data write to file"));
16813 /* Unlink a file if the argument is not NULL. */
16816 unlink_if_set (void *p
)
16818 char **filename
= p
;
16820 unlink (*filename
);
16823 /* A helper struct used when iterating over debug_types. */
16824 struct signatured_type_index_data
16826 struct objfile
*objfile
;
16827 struct mapped_symtab
*symtab
;
16828 struct obstack
*types_list
;
16833 /* A helper function that writes a single signatured_type to an
16837 write_one_signatured_type (void **slot
, void *d
)
16839 struct signatured_type_index_data
*info
= d
;
16840 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
16841 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
16842 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
16845 write_psymbols (info
->symtab
,
16847 info
->objfile
->global_psymbols
.list
16848 + psymtab
->globals_offset
,
16849 psymtab
->n_global_syms
, info
->cu_index
,
16851 write_psymbols (info
->symtab
,
16853 info
->objfile
->static_psymbols
.list
16854 + psymtab
->statics_offset
,
16855 psymtab
->n_static_syms
, info
->cu_index
,
16858 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->per_cu
.offset
);
16859 obstack_grow (info
->types_list
, val
, 8);
16860 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
16861 obstack_grow (info
->types_list
, val
, 8);
16862 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
16863 obstack_grow (info
->types_list
, val
, 8);
16870 /* Create an index file for OBJFILE in the directory DIR. */
16873 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
16875 struct cleanup
*cleanup
;
16876 char *filename
, *cleanup_filename
;
16877 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
16878 struct obstack cu_list
, types_cu_list
;
16881 struct mapped_symtab
*symtab
;
16882 offset_type val
, size_of_contents
, total_len
;
16886 htab_t cu_index_htab
;
16887 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
16889 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
16892 if (dwarf2_per_objfile
->using_index
)
16893 error (_("Cannot use an index to create the index"));
16895 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
16896 error (_("Cannot make an index when the file has multiple .debug_types sections"));
16898 if (stat (objfile
->name
, &st
) < 0)
16899 perror_with_name (objfile
->name
);
16901 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
16902 INDEX_SUFFIX
, (char *) NULL
);
16903 cleanup
= make_cleanup (xfree
, filename
);
16905 out_file
= fopen (filename
, "wb");
16907 error (_("Can't open `%s' for writing"), filename
);
16909 cleanup_filename
= filename
;
16910 make_cleanup (unlink_if_set
, &cleanup_filename
);
16912 symtab
= create_mapped_symtab ();
16913 make_cleanup (cleanup_mapped_symtab
, symtab
);
16915 obstack_init (&addr_obstack
);
16916 make_cleanup_obstack_free (&addr_obstack
);
16918 obstack_init (&cu_list
);
16919 make_cleanup_obstack_free (&cu_list
);
16921 obstack_init (&types_cu_list
);
16922 make_cleanup_obstack_free (&types_cu_list
);
16924 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
16925 NULL
, xcalloc
, xfree
);
16926 make_cleanup_htab_delete (psyms_seen
);
16928 /* While we're scanning CU's create a table that maps a psymtab pointer
16929 (which is what addrmap records) to its index (which is what is recorded
16930 in the index file). This will later be needed to write the address
16932 cu_index_htab
= htab_create_alloc (100,
16933 hash_psymtab_cu_index
,
16934 eq_psymtab_cu_index
,
16935 NULL
, xcalloc
, xfree
);
16936 make_cleanup_htab_delete (cu_index_htab
);
16937 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
16938 xmalloc (sizeof (struct psymtab_cu_index_map
)
16939 * dwarf2_per_objfile
->n_comp_units
);
16940 make_cleanup (xfree
, psymtab_cu_index_map
);
16942 /* The CU list is already sorted, so we don't need to do additional
16943 work here. Also, the debug_types entries do not appear in
16944 all_comp_units, but only in their own hash table. */
16945 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
16947 struct dwarf2_per_cu_data
*per_cu
16948 = dwarf2_per_objfile
->all_comp_units
[i
];
16949 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
16951 struct psymtab_cu_index_map
*map
;
16954 write_psymbols (symtab
,
16956 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
16957 psymtab
->n_global_syms
, i
,
16959 write_psymbols (symtab
,
16961 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
16962 psymtab
->n_static_syms
, i
,
16965 map
= &psymtab_cu_index_map
[i
];
16966 map
->psymtab
= psymtab
;
16968 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
16969 gdb_assert (slot
!= NULL
);
16970 gdb_assert (*slot
== NULL
);
16973 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
16974 obstack_grow (&cu_list
, val
, 8);
16975 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
16976 obstack_grow (&cu_list
, val
, 8);
16979 /* Dump the address map. */
16980 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
16982 /* Write out the .debug_type entries, if any. */
16983 if (dwarf2_per_objfile
->signatured_types
)
16985 struct signatured_type_index_data sig_data
;
16987 sig_data
.objfile
= objfile
;
16988 sig_data
.symtab
= symtab
;
16989 sig_data
.types_list
= &types_cu_list
;
16990 sig_data
.psyms_seen
= psyms_seen
;
16991 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
16992 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
16993 write_one_signatured_type
, &sig_data
);
16996 obstack_init (&constant_pool
);
16997 make_cleanup_obstack_free (&constant_pool
);
16998 obstack_init (&symtab_obstack
);
16999 make_cleanup_obstack_free (&symtab_obstack
);
17000 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
17002 obstack_init (&contents
);
17003 make_cleanup_obstack_free (&contents
);
17004 size_of_contents
= 6 * sizeof (offset_type
);
17005 total_len
= size_of_contents
;
17007 /* The version number. */
17008 val
= MAYBE_SWAP (5);
17009 obstack_grow (&contents
, &val
, sizeof (val
));
17011 /* The offset of the CU list from the start of the file. */
17012 val
= MAYBE_SWAP (total_len
);
17013 obstack_grow (&contents
, &val
, sizeof (val
));
17014 total_len
+= obstack_object_size (&cu_list
);
17016 /* The offset of the types CU list from the start of the file. */
17017 val
= MAYBE_SWAP (total_len
);
17018 obstack_grow (&contents
, &val
, sizeof (val
));
17019 total_len
+= obstack_object_size (&types_cu_list
);
17021 /* The offset of the address table from the start of the file. */
17022 val
= MAYBE_SWAP (total_len
);
17023 obstack_grow (&contents
, &val
, sizeof (val
));
17024 total_len
+= obstack_object_size (&addr_obstack
);
17026 /* The offset of the symbol table from the start of the file. */
17027 val
= MAYBE_SWAP (total_len
);
17028 obstack_grow (&contents
, &val
, sizeof (val
));
17029 total_len
+= obstack_object_size (&symtab_obstack
);
17031 /* The offset of the constant pool from the start of the file. */
17032 val
= MAYBE_SWAP (total_len
);
17033 obstack_grow (&contents
, &val
, sizeof (val
));
17034 total_len
+= obstack_object_size (&constant_pool
);
17036 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
17038 write_obstack (out_file
, &contents
);
17039 write_obstack (out_file
, &cu_list
);
17040 write_obstack (out_file
, &types_cu_list
);
17041 write_obstack (out_file
, &addr_obstack
);
17042 write_obstack (out_file
, &symtab_obstack
);
17043 write_obstack (out_file
, &constant_pool
);
17047 /* We want to keep the file, so we set cleanup_filename to NULL
17048 here. See unlink_if_set. */
17049 cleanup_filename
= NULL
;
17051 do_cleanups (cleanup
);
17054 /* Implementation of the `save gdb-index' command.
17056 Note that the file format used by this command is documented in the
17057 GDB manual. Any changes here must be documented there. */
17060 save_gdb_index_command (char *arg
, int from_tty
)
17062 struct objfile
*objfile
;
17065 error (_("usage: save gdb-index DIRECTORY"));
17067 ALL_OBJFILES (objfile
)
17071 /* If the objfile does not correspond to an actual file, skip it. */
17072 if (stat (objfile
->name
, &st
) < 0)
17075 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
17076 if (dwarf2_per_objfile
)
17078 volatile struct gdb_exception except
;
17080 TRY_CATCH (except
, RETURN_MASK_ERROR
)
17082 write_psymtabs_to_index (objfile
, arg
);
17084 if (except
.reason
< 0)
17085 exception_fprintf (gdb_stderr
, except
,
17086 _("Error while writing index for `%s': "),
17094 int dwarf2_always_disassemble
;
17097 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
17098 struct cmd_list_element
*c
, const char *value
)
17100 fprintf_filtered (file
,
17101 _("Whether to always disassemble "
17102 "DWARF expressions is %s.\n"),
17107 show_check_physname (struct ui_file
*file
, int from_tty
,
17108 struct cmd_list_element
*c
, const char *value
)
17110 fprintf_filtered (file
,
17111 _("Whether to check \"physname\" is %s.\n"),
17115 void _initialize_dwarf2_read (void);
17118 _initialize_dwarf2_read (void)
17120 struct cmd_list_element
*c
;
17122 dwarf2_objfile_data_key
17123 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
17125 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
17126 Set DWARF 2 specific variables.\n\
17127 Configure DWARF 2 variables such as the cache size"),
17128 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
17129 0/*allow-unknown*/, &maintenance_set_cmdlist
);
17131 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
17132 Show DWARF 2 specific variables\n\
17133 Show DWARF 2 variables such as the cache size"),
17134 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
17135 0/*allow-unknown*/, &maintenance_show_cmdlist
);
17137 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
17138 &dwarf2_max_cache_age
, _("\
17139 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
17140 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
17141 A higher limit means that cached compilation units will be stored\n\
17142 in memory longer, and more total memory will be used. Zero disables\n\
17143 caching, which can slow down startup."),
17145 show_dwarf2_max_cache_age
,
17146 &set_dwarf2_cmdlist
,
17147 &show_dwarf2_cmdlist
);
17149 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
17150 &dwarf2_always_disassemble
, _("\
17151 Set whether `info address' always disassembles DWARF expressions."), _("\
17152 Show whether `info address' always disassembles DWARF expressions."), _("\
17153 When enabled, DWARF expressions are always printed in an assembly-like\n\
17154 syntax. When disabled, expressions will be printed in a more\n\
17155 conversational style, when possible."),
17157 show_dwarf2_always_disassemble
,
17158 &set_dwarf2_cmdlist
,
17159 &show_dwarf2_cmdlist
);
17161 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
17162 Set debugging of the dwarf2 DIE reader."), _("\
17163 Show debugging of the dwarf2 DIE reader."), _("\
17164 When enabled (non-zero), DIEs are dumped after they are read in.\n\
17165 The value is the maximum depth to print."),
17168 &setdebuglist
, &showdebuglist
);
17170 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
17171 Set cross-checking of \"physname\" code against demangler."), _("\
17172 Show cross-checking of \"physname\" code against demangler."), _("\
17173 When enabled, GDB's internal \"physname\" code is checked against\n\
17175 NULL
, show_check_physname
,
17176 &setdebuglist
, &showdebuglist
);
17178 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
17180 Save a gdb-index file.\n\
17181 Usage: save gdb-index DIRECTORY"),
17183 set_cmd_completer (c
, filename_completer
);