1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol
*symbolp
;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length
; /* length of the .debug_info
86 unsigned short version
; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
89 unsigned char addr_size
; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length
; /* byte length of the statement
102 unsigned short version
; /* version number -- 2 for DWARF
104 unsigned int prologue_length
; /* # bytes between prologue &
106 unsigned char minimum_instruction_length
; /* byte size of
108 unsigned char default_is_stmt
; /* initial value of is_stmt
111 unsigned char line_range
;
112 unsigned char opcode_base
; /* number assigned to first special
114 unsigned char *standard_opcode_lengths
;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug
= 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info
;
129 static const struct objfile_data
*dwarf2_objfile_data_key
;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type
;
145 DEF_VEC_I (offset_type
);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte
*address_table
;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size
;
157 /* The hash table. */
158 const offset_type
*index_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type index_table_slots
;
161 /* A pointer to the constant pool. */
162 const char *constant_pool
;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info
;
168 struct dwarf2_section_info abbrev
;
169 struct dwarf2_section_info line
;
170 struct dwarf2_section_info loc
;
171 struct dwarf2_section_info macinfo
;
172 struct dwarf2_section_info str
;
173 struct dwarf2_section_info ranges
;
174 struct dwarf2_section_info types
;
175 struct dwarf2_section_info frame
;
176 struct dwarf2_section_info eh_frame
;
177 struct dwarf2_section_info gdb_index
;
180 struct objfile
*objfile
;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data
**all_comp_units
;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units
;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data
**type_comp_units
;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data
*read_in_chain
;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types
;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero
;
207 /* True if we are using the mapped index. */
208 unsigned char using_index
;
210 /* The mapped index. */
211 struct mapped_index
*index_table
;
213 /* Set during partial symbol reading, to prevent queueing of full
215 int reading_partial_symbols
;
217 /* Table mapping type .debug_info DIE offsets to types.
218 This is NULL if not allocated yet.
219 It (currently) makes sense to allocate debug_types_type_hash lazily.
220 To keep things simple we allocate both lazily. */
221 htab_t debug_info_type_hash
;
223 /* Table mapping type .debug_types DIE offsets to types.
224 This is NULL if not allocated yet. */
225 htab_t debug_types_type_hash
;
228 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
230 /* names of the debugging sections */
232 /* Note that if the debugging section has been compressed, it might
233 have a name like .zdebug_info. */
235 #define INFO_SECTION "debug_info"
236 #define ABBREV_SECTION "debug_abbrev"
237 #define LINE_SECTION "debug_line"
238 #define LOC_SECTION "debug_loc"
239 #define MACINFO_SECTION "debug_macinfo"
240 #define STR_SECTION "debug_str"
241 #define RANGES_SECTION "debug_ranges"
242 #define TYPES_SECTION "debug_types"
243 #define FRAME_SECTION "debug_frame"
244 #define EH_FRAME_SECTION "eh_frame"
245 #define GDB_INDEX_SECTION "gdb_index"
247 /* local data types */
249 /* We hold several abbreviation tables in memory at the same time. */
250 #ifndef ABBREV_HASH_SIZE
251 #define ABBREV_HASH_SIZE 121
254 /* The data in a compilation unit header, after target2host
255 translation, looks like this. */
256 struct comp_unit_head
260 unsigned char addr_size
;
261 unsigned char signed_addr_p
;
262 unsigned int abbrev_offset
;
264 /* Size of file offsets; either 4 or 8. */
265 unsigned int offset_size
;
267 /* Size of the length field; either 4 or 12. */
268 unsigned int initial_length_size
;
270 /* Offset to the first byte of this compilation unit header in the
271 .debug_info section, for resolving relative reference dies. */
274 /* Offset to first die in this cu from the start of the cu.
275 This will be the first byte following the compilation unit header. */
276 unsigned int first_die_offset
;
279 /* Type used for delaying computation of method physnames.
280 See comments for compute_delayed_physnames. */
281 struct delayed_method_info
283 /* The type to which the method is attached, i.e., its parent class. */
286 /* The index of the method in the type's function fieldlists. */
289 /* The index of the method in the fieldlist. */
292 /* The name of the DIE. */
295 /* The DIE associated with this method. */
296 struct die_info
*die
;
299 typedef struct delayed_method_info delayed_method_info
;
300 DEF_VEC_O (delayed_method_info
);
302 /* Internal state when decoding a particular compilation unit. */
305 /* The objfile containing this compilation unit. */
306 struct objfile
*objfile
;
308 /* The header of the compilation unit. */
309 struct comp_unit_head header
;
311 /* Base address of this compilation unit. */
312 CORE_ADDR base_address
;
314 /* Non-zero if base_address has been set. */
317 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
319 /* The language we are debugging. */
320 enum language language
;
321 const struct language_defn
*language_defn
;
323 const char *producer
;
325 /* The generic symbol table building routines have separate lists for
326 file scope symbols and all all other scopes (local scopes). So
327 we need to select the right one to pass to add_symbol_to_list().
328 We do it by keeping a pointer to the correct list in list_in_scope.
330 FIXME: The original dwarf code just treated the file scope as the
331 first local scope, and all other local scopes as nested local
332 scopes, and worked fine. Check to see if we really need to
333 distinguish these in buildsym.c. */
334 struct pending
**list_in_scope
;
336 /* DWARF abbreviation table associated with this compilation unit. */
337 struct abbrev_info
**dwarf2_abbrevs
;
339 /* Storage for the abbrev table. */
340 struct obstack abbrev_obstack
;
342 /* Hash table holding all the loaded partial DIEs. */
345 /* Storage for things with the same lifetime as this read-in compilation
346 unit, including partial DIEs. */
347 struct obstack comp_unit_obstack
;
349 /* When multiple dwarf2_cu structures are living in memory, this field
350 chains them all together, so that they can be released efficiently.
351 We will probably also want a generation counter so that most-recently-used
352 compilation units are cached... */
353 struct dwarf2_per_cu_data
*read_in_chain
;
355 /* Backchain to our per_cu entry if the tree has been built. */
356 struct dwarf2_per_cu_data
*per_cu
;
358 /* How many compilation units ago was this CU last referenced? */
361 /* A hash table of die offsets for following references. */
364 /* Full DIEs if read in. */
365 struct die_info
*dies
;
367 /* A set of pointers to dwarf2_per_cu_data objects for compilation
368 units referenced by this one. Only set during full symbol processing;
369 partial symbol tables do not have dependencies. */
372 /* Header data from the line table, during full symbol processing. */
373 struct line_header
*line_header
;
375 /* A list of methods which need to have physnames computed
376 after all type information has been read. */
377 VEC (delayed_method_info
) *method_list
;
379 /* Mark used when releasing cached dies. */
380 unsigned int mark
: 1;
382 /* This flag will be set if this compilation unit might include
383 inter-compilation-unit references. */
384 unsigned int has_form_ref_addr
: 1;
386 /* This flag will be set if this compilation unit includes any
387 DW_TAG_namespace DIEs. If we know that there are explicit
388 DIEs for namespaces, we don't need to try to infer them
389 from mangled names. */
390 unsigned int has_namespace_info
: 1;
393 /* When using the index (and thus not using psymtabs), each CU has an
394 object of this type. This is used to hold information needed by
395 the various "quick" methods. */
396 struct dwarf2_per_cu_quick_data
398 /* The line table. This can be NULL if there was no line table. */
399 struct line_header
*lines
;
401 /* The file names from the line table. */
402 const char **file_names
;
403 /* The file names from the line table after being run through
405 const char **full_names
;
407 /* The corresponding symbol table. This is NULL if symbols for this
408 CU have not yet been read. */
409 struct symtab
*symtab
;
411 /* A temporary mark bit used when iterating over all CUs in
412 expand_symtabs_matching. */
413 unsigned int mark
: 1;
415 /* True if we've tried to read the line table. */
416 unsigned int read_lines
: 1;
419 /* Persistent data held for a compilation unit, even when not
420 processing it. We put a pointer to this structure in the
421 read_symtab_private field of the psymtab. If we encounter
422 inter-compilation-unit references, we also maintain a sorted
423 list of all compilation units. */
425 struct dwarf2_per_cu_data
427 /* The start offset and length of this compilation unit. 2**29-1
428 bytes should suffice to store the length of any compilation unit
429 - if it doesn't, GDB will fall over anyway.
430 NOTE: Unlike comp_unit_head.length, this length includes
431 initial_length_size. */
433 unsigned int length
: 29;
435 /* Flag indicating this compilation unit will be read in before
436 any of the current compilation units are processed. */
437 unsigned int queued
: 1;
439 /* This flag will be set if we need to load absolutely all DIEs
440 for this compilation unit, instead of just the ones we think
441 are interesting. It gets set if we look for a DIE in the
442 hash table and don't find it. */
443 unsigned int load_all_dies
: 1;
445 /* Non-zero if this CU is from .debug_types.
446 Otherwise it's from .debug_info. */
447 unsigned int from_debug_types
: 1;
449 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
450 of the CU cache it gets reset to NULL again. */
451 struct dwarf2_cu
*cu
;
453 /* The corresponding objfile. */
454 struct objfile
*objfile
;
456 /* When using partial symbol tables, the 'psymtab' field is active.
457 Otherwise the 'quick' field is active. */
460 /* The partial symbol table associated with this compilation unit,
461 or NULL for partial units (which do not have an associated
463 struct partial_symtab
*psymtab
;
465 /* Data needed by the "quick" functions. */
466 struct dwarf2_per_cu_quick_data
*quick
;
470 /* Entry in the signatured_types hash table. */
472 struct signatured_type
476 /* Offset in .debug_types of the TU (type_unit) for this type. */
479 /* Offset in .debug_types of the type defined by this TU. */
480 unsigned int type_offset
;
482 /* The CU(/TU) of this type. */
483 struct dwarf2_per_cu_data per_cu
;
486 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
487 which are used for both .debug_info and .debug_types dies.
488 All parameters here are unchanging for the life of the call.
489 This struct exists to abstract away the constant parameters of
492 struct die_reader_specs
494 /* The bfd of this objfile. */
497 /* The CU of the DIE we are parsing. */
498 struct dwarf2_cu
*cu
;
500 /* Pointer to start of section buffer.
501 This is either the start of .debug_info or .debug_types. */
502 const gdb_byte
*buffer
;
505 /* The line number information for a compilation unit (found in the
506 .debug_line section) begins with a "statement program header",
507 which contains the following information. */
510 unsigned int total_length
;
511 unsigned short version
;
512 unsigned int header_length
;
513 unsigned char minimum_instruction_length
;
514 unsigned char maximum_ops_per_instruction
;
515 unsigned char default_is_stmt
;
517 unsigned char line_range
;
518 unsigned char opcode_base
;
520 /* standard_opcode_lengths[i] is the number of operands for the
521 standard opcode whose value is i. This means that
522 standard_opcode_lengths[0] is unused, and the last meaningful
523 element is standard_opcode_lengths[opcode_base - 1]. */
524 unsigned char *standard_opcode_lengths
;
526 /* The include_directories table. NOTE! These strings are not
527 allocated with xmalloc; instead, they are pointers into
528 debug_line_buffer. If you try to free them, `free' will get
530 unsigned int num_include_dirs
, include_dirs_size
;
533 /* The file_names table. NOTE! These strings are not allocated
534 with xmalloc; instead, they are pointers into debug_line_buffer.
535 Don't try to free them directly. */
536 unsigned int num_file_names
, file_names_size
;
540 unsigned int dir_index
;
541 unsigned int mod_time
;
543 int included_p
; /* Non-zero if referenced by the Line Number Program. */
544 struct symtab
*symtab
; /* The associated symbol table, if any. */
547 /* The start and end of the statement program following this
548 header. These point into dwarf2_per_objfile->line_buffer. */
549 gdb_byte
*statement_program_start
, *statement_program_end
;
552 /* When we construct a partial symbol table entry we only
553 need this much information. */
554 struct partial_die_info
556 /* Offset of this DIE. */
559 /* DWARF-2 tag for this DIE. */
560 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
562 /* Assorted flags describing the data found in this DIE. */
563 unsigned int has_children
: 1;
564 unsigned int is_external
: 1;
565 unsigned int is_declaration
: 1;
566 unsigned int has_type
: 1;
567 unsigned int has_specification
: 1;
568 unsigned int has_pc_info
: 1;
570 /* Flag set if the SCOPE field of this structure has been
572 unsigned int scope_set
: 1;
574 /* Flag set if the DIE has a byte_size attribute. */
575 unsigned int has_byte_size
: 1;
577 /* Flag set if any of the DIE's children are template arguments. */
578 unsigned int has_template_arguments
: 1;
580 /* The name of this DIE. Normally the value of DW_AT_name, but
581 sometimes a default name for unnamed DIEs. */
584 /* The scope to prepend to our children. This is generally
585 allocated on the comp_unit_obstack, so will disappear
586 when this compilation unit leaves the cache. */
589 /* The location description associated with this DIE, if any. */
590 struct dwarf_block
*locdesc
;
592 /* If HAS_PC_INFO, the PC range associated with this DIE. */
596 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
597 DW_AT_sibling, if any. */
600 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
601 DW_AT_specification (or DW_AT_abstract_origin or
603 unsigned int spec_offset
;
605 /* Pointers to this DIE's parent, first child, and next sibling,
607 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
610 /* This data structure holds the information of an abbrev. */
613 unsigned int number
; /* number identifying abbrev */
614 enum dwarf_tag tag
; /* dwarf tag */
615 unsigned short has_children
; /* boolean */
616 unsigned short num_attrs
; /* number of attributes */
617 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
618 struct abbrev_info
*next
; /* next in chain */
623 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
624 ENUM_BITFIELD(dwarf_form
) form
: 16;
627 /* Attributes have a name and a value */
630 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
631 ENUM_BITFIELD(dwarf_form
) form
: 15;
633 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
634 field should be in u.str (existing only for DW_STRING) but it is kept
635 here for better struct attribute alignment. */
636 unsigned int string_is_canonical
: 1;
641 struct dwarf_block
*blk
;
645 struct signatured_type
*signatured_type
;
650 /* This data structure holds a complete die structure. */
653 /* DWARF-2 tag for this DIE. */
654 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
656 /* Number of attributes */
657 unsigned char num_attrs
;
659 /* True if we're presently building the full type name for the
660 type derived from this DIE. */
661 unsigned char building_fullname
: 1;
666 /* Offset in .debug_info or .debug_types section. */
669 /* The dies in a compilation unit form an n-ary tree. PARENT
670 points to this die's parent; CHILD points to the first child of
671 this node; and all the children of a given node are chained
672 together via their SIBLING fields. */
673 struct die_info
*child
; /* Its first child, if any. */
674 struct die_info
*sibling
; /* Its next sibling, if any. */
675 struct die_info
*parent
; /* Its parent, if any. */
677 /* An array of attributes, with NUM_ATTRS elements. There may be
678 zero, but it's not common and zero-sized arrays are not
679 sufficiently portable C. */
680 struct attribute attrs
[1];
683 struct function_range
686 CORE_ADDR lowpc
, highpc
;
688 struct function_range
*next
;
691 /* Get at parts of an attribute structure */
693 #define DW_STRING(attr) ((attr)->u.str)
694 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
695 #define DW_UNSND(attr) ((attr)->u.unsnd)
696 #define DW_BLOCK(attr) ((attr)->u.blk)
697 #define DW_SND(attr) ((attr)->u.snd)
698 #define DW_ADDR(attr) ((attr)->u.addr)
699 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
701 /* Blocks are a bunch of untyped bytes. */
708 #ifndef ATTR_ALLOC_CHUNK
709 #define ATTR_ALLOC_CHUNK 4
712 /* Allocate fields for structs, unions and enums in this size. */
713 #ifndef DW_FIELD_ALLOC_CHUNK
714 #define DW_FIELD_ALLOC_CHUNK 4
717 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
718 but this would require a corresponding change in unpack_field_as_long
720 static int bits_per_byte
= 8;
722 /* The routines that read and process dies for a C struct or C++ class
723 pass lists of data member fields and lists of member function fields
724 in an instance of a field_info structure, as defined below. */
727 /* List of data member and baseclasses fields. */
730 struct nextfield
*next
;
735 *fields
, *baseclasses
;
737 /* Number of fields (including baseclasses). */
740 /* Number of baseclasses. */
743 /* Set if the accesibility of one of the fields is not public. */
744 int non_public_fields
;
746 /* Member function fields array, entries are allocated in the order they
747 are encountered in the object file. */
750 struct nextfnfield
*next
;
751 struct fn_field fnfield
;
755 /* Member function fieldlist array, contains name of possibly overloaded
756 member function, number of overloaded member functions and a pointer
757 to the head of the member function field chain. */
762 struct nextfnfield
*head
;
766 /* Number of entries in the fnfieldlists array. */
769 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
770 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
771 struct typedef_field_list
773 struct typedef_field field
;
774 struct typedef_field_list
*next
;
777 unsigned typedef_field_list_count
;
780 /* One item on the queue of compilation units to read in full symbols
782 struct dwarf2_queue_item
784 struct dwarf2_per_cu_data
*per_cu
;
785 struct dwarf2_queue_item
*next
;
788 /* The current queue. */
789 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
791 /* Loaded secondary compilation units are kept in memory until they
792 have not been referenced for the processing of this many
793 compilation units. Set this to zero to disable caching. Cache
794 sizes of up to at least twenty will improve startup time for
795 typical inter-CU-reference binaries, at an obvious memory cost. */
796 static int dwarf2_max_cache_age
= 5;
798 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
799 struct cmd_list_element
*c
, const char *value
)
801 fprintf_filtered (file
, _("\
802 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
807 /* Various complaints about symbol reading that don't abort the process */
810 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
812 complaint (&symfile_complaints
,
813 _("statement list doesn't fit in .debug_line section"));
817 dwarf2_debug_line_missing_file_complaint (void)
819 complaint (&symfile_complaints
,
820 _(".debug_line section has line data without a file"));
824 dwarf2_debug_line_missing_end_sequence_complaint (void)
826 complaint (&symfile_complaints
,
827 _(".debug_line section has line program sequence without an end"));
831 dwarf2_complex_location_expr_complaint (void)
833 complaint (&symfile_complaints
, _("location expression too complex"));
837 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
840 complaint (&symfile_complaints
,
841 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
846 dwarf2_macros_too_long_complaint (void)
848 complaint (&symfile_complaints
,
849 _("macro info runs off end of `.debug_macinfo' section"));
853 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
855 complaint (&symfile_complaints
,
856 _("macro debug info contains a malformed macro definition:\n`%s'"),
861 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
863 complaint (&symfile_complaints
,
864 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
867 /* local function prototypes */
869 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
871 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
874 static void dwarf2_build_psymtabs_hard (struct objfile
*);
876 static void scan_partial_symbols (struct partial_die_info
*,
877 CORE_ADDR
*, CORE_ADDR
*,
878 int, struct dwarf2_cu
*);
880 static void add_partial_symbol (struct partial_die_info
*,
883 static void add_partial_namespace (struct partial_die_info
*pdi
,
884 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
885 int need_pc
, struct dwarf2_cu
*cu
);
887 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
888 CORE_ADDR
*highpc
, int need_pc
,
889 struct dwarf2_cu
*cu
);
891 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
892 struct dwarf2_cu
*cu
);
894 static void add_partial_subprogram (struct partial_die_info
*pdi
,
895 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
896 int need_pc
, struct dwarf2_cu
*cu
);
898 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
899 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
900 bfd
*abfd
, struct dwarf2_cu
*cu
);
902 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
904 static void psymtab_to_symtab_1 (struct partial_symtab
*);
906 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
908 static void dwarf2_free_abbrev_table (void *);
910 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
913 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
916 static struct partial_die_info
*load_partial_dies (bfd
*,
917 gdb_byte
*, gdb_byte
*,
918 int, struct dwarf2_cu
*);
920 static gdb_byte
*read_partial_die (struct partial_die_info
*,
921 struct abbrev_info
*abbrev
,
923 gdb_byte
*, gdb_byte
*,
926 static struct partial_die_info
*find_partial_die (unsigned int,
929 static void fixup_partial_die (struct partial_die_info
*,
932 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
933 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
935 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
936 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
938 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
940 static int read_1_signed_byte (bfd
*, gdb_byte
*);
942 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
944 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
946 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
948 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
951 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
953 static LONGEST read_checked_initial_length_and_offset
954 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
955 unsigned int *, unsigned int *);
957 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
960 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
962 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
964 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
966 static char *read_indirect_string (bfd
*, gdb_byte
*,
967 const struct comp_unit_head
*,
970 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
972 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
974 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
976 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
978 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
981 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
985 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
986 struct dwarf2_cu
*cu
);
988 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
990 static struct die_info
*die_specification (struct die_info
*die
,
991 struct dwarf2_cu
**);
993 static void free_line_header (struct line_header
*lh
);
995 static void add_file_name (struct line_header
*, char *, unsigned int,
996 unsigned int, unsigned int);
998 static struct line_header
*(dwarf_decode_line_header
999 (unsigned int offset
,
1000 bfd
*abfd
, struct dwarf2_cu
*cu
));
1002 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
1003 struct dwarf2_cu
*, struct partial_symtab
*);
1005 static void dwarf2_start_subfile (char *, char *, char *);
1007 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1008 struct dwarf2_cu
*);
1010 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1011 struct dwarf2_cu
*, struct symbol
*);
1013 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1014 struct dwarf2_cu
*);
1016 static void dwarf2_const_value_attr (struct attribute
*attr
,
1019 struct obstack
*obstack
,
1020 struct dwarf2_cu
*cu
, long *value
,
1022 struct dwarf2_locexpr_baton
**baton
);
1024 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1026 static int need_gnat_info (struct dwarf2_cu
*);
1028 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
1030 static void set_descriptive_type (struct type
*, struct die_info
*,
1031 struct dwarf2_cu
*);
1033 static struct type
*die_containing_type (struct die_info
*,
1034 struct dwarf2_cu
*);
1036 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1037 struct dwarf2_cu
*);
1039 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1041 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1043 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1045 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1046 const char *suffix
, int physname
,
1047 struct dwarf2_cu
*cu
);
1049 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1051 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1053 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1055 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1057 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1058 struct dwarf2_cu
*, struct partial_symtab
*);
1060 static int dwarf2_get_pc_bounds (struct die_info
*,
1061 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1062 struct partial_symtab
*);
1064 static void get_scope_pc_bounds (struct die_info
*,
1065 CORE_ADDR
*, CORE_ADDR
*,
1066 struct dwarf2_cu
*);
1068 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1069 CORE_ADDR
, struct dwarf2_cu
*);
1071 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1072 struct dwarf2_cu
*);
1074 static void dwarf2_attach_fields_to_type (struct field_info
*,
1075 struct type
*, struct dwarf2_cu
*);
1077 static void dwarf2_add_member_fn (struct field_info
*,
1078 struct die_info
*, struct type
*,
1079 struct dwarf2_cu
*);
1081 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1082 struct type
*, struct dwarf2_cu
*);
1084 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1086 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1088 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1090 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1092 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1094 static struct type
*read_module_type (struct die_info
*die
,
1095 struct dwarf2_cu
*cu
);
1097 static const char *namespace_name (struct die_info
*die
,
1098 int *is_anonymous
, struct dwarf2_cu
*);
1100 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1102 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1104 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1105 struct dwarf2_cu
*);
1107 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1109 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1111 gdb_byte
**new_info_ptr
,
1112 struct die_info
*parent
);
1114 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1116 gdb_byte
**new_info_ptr
,
1117 struct die_info
*parent
);
1119 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1121 gdb_byte
**new_info_ptr
,
1122 struct die_info
*parent
);
1124 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1125 struct die_info
**, gdb_byte
*,
1128 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1130 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1133 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1135 static const char *dwarf2_full_name (char *name
,
1136 struct die_info
*die
,
1137 struct dwarf2_cu
*cu
);
1139 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1140 struct dwarf2_cu
**);
1142 static char *dwarf_tag_name (unsigned int);
1144 static char *dwarf_attr_name (unsigned int);
1146 static char *dwarf_form_name (unsigned int);
1148 static char *dwarf_bool_name (unsigned int);
1150 static char *dwarf_type_encoding_name (unsigned int);
1153 static char *dwarf_cfi_name (unsigned int);
1156 static struct die_info
*sibling_die (struct die_info
*);
1158 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1160 static void dump_die_for_error (struct die_info
*);
1162 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1165 /*static*/ void dump_die (struct die_info
*, int max_level
);
1167 static void store_in_ref_table (struct die_info
*,
1168 struct dwarf2_cu
*);
1170 static int is_ref_attr (struct attribute
*);
1172 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1174 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1176 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1178 struct dwarf2_cu
**);
1180 static struct die_info
*follow_die_ref (struct die_info
*,
1182 struct dwarf2_cu
**);
1184 static struct die_info
*follow_die_sig (struct die_info
*,
1186 struct dwarf2_cu
**);
1188 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1189 unsigned int offset
);
1191 static void read_signatured_type (struct objfile
*,
1192 struct signatured_type
*type_sig
);
1194 /* memory allocation interface */
1196 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1198 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1200 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1202 static void initialize_cu_func_list (struct dwarf2_cu
*);
1204 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1205 struct dwarf2_cu
*);
1207 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1208 char *, bfd
*, struct dwarf2_cu
*);
1210 static int attr_form_is_block (struct attribute
*);
1212 static int attr_form_is_section_offset (struct attribute
*);
1214 static int attr_form_is_constant (struct attribute
*);
1216 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1218 struct dwarf2_cu
*cu
);
1220 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1221 struct abbrev_info
*abbrev
,
1222 struct dwarf2_cu
*cu
);
1224 static void free_stack_comp_unit (void *);
1226 static hashval_t
partial_die_hash (const void *item
);
1228 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1230 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1231 (unsigned int offset
, struct objfile
*objfile
);
1233 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1234 (unsigned int offset
, struct objfile
*objfile
);
1236 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1238 static void free_one_comp_unit (void *);
1240 static void free_cached_comp_units (void *);
1242 static void age_cached_comp_units (void);
1244 static void free_one_cached_comp_unit (void *);
1246 static struct type
*set_die_type (struct die_info
*, struct type
*,
1247 struct dwarf2_cu
*);
1249 static void create_all_comp_units (struct objfile
*);
1251 static int create_debug_types_hash_table (struct objfile
*objfile
);
1253 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1256 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1258 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1259 struct dwarf2_per_cu_data
*);
1261 static void dwarf2_mark (struct dwarf2_cu
*);
1263 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1265 static struct type
*get_die_type_at_offset (unsigned int,
1266 struct dwarf2_per_cu_data
*per_cu
);
1268 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1270 static void dwarf2_release_queue (void *dummy
);
1272 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1273 struct objfile
*objfile
);
1275 static void process_queue (struct objfile
*objfile
);
1277 static void find_file_and_directory (struct die_info
*die
,
1278 struct dwarf2_cu
*cu
,
1279 char **name
, char **comp_dir
);
1281 static char *file_full_name (int file
, struct line_header
*lh
,
1282 const char *comp_dir
);
1284 static gdb_byte
*partial_read_comp_unit_head (struct comp_unit_head
*header
,
1287 unsigned int buffer_size
,
1290 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1291 struct dwarf2_cu
*cu
);
1293 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1297 /* Convert VALUE between big- and little-endian. */
1299 byte_swap (offset_type value
)
1303 result
= (value
& 0xff) << 24;
1304 result
|= (value
& 0xff00) << 8;
1305 result
|= (value
& 0xff0000) >> 8;
1306 result
|= (value
& 0xff000000) >> 24;
1310 #define MAYBE_SWAP(V) byte_swap (V)
1313 #define MAYBE_SWAP(V) (V)
1314 #endif /* WORDS_BIGENDIAN */
1316 /* The suffix for an index file. */
1317 #define INDEX_SUFFIX ".gdb-index"
1319 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1320 struct dwarf2_cu
*cu
);
1322 /* Try to locate the sections we need for DWARF 2 debugging
1323 information and return true if we have enough to do something. */
1326 dwarf2_has_info (struct objfile
*objfile
)
1328 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1329 if (!dwarf2_per_objfile
)
1331 /* Initialize per-objfile state. */
1332 struct dwarf2_per_objfile
*data
1333 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1335 memset (data
, 0, sizeof (*data
));
1336 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1337 dwarf2_per_objfile
= data
;
1339 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1340 dwarf2_per_objfile
->objfile
= objfile
;
1342 return (dwarf2_per_objfile
->info
.asection
!= NULL
1343 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1346 /* When loading sections, we can either look for ".<name>", or for
1347 * ".z<name>", which indicates a compressed section. */
1350 section_is_p (const char *section_name
, const char *name
)
1352 return (section_name
[0] == '.'
1353 && (strcmp (section_name
+ 1, name
) == 0
1354 || (section_name
[1] == 'z'
1355 && strcmp (section_name
+ 2, name
) == 0)));
1358 /* This function is mapped across the sections and remembers the
1359 offset and size of each of the debugging sections we are interested
1363 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1365 if (section_is_p (sectp
->name
, INFO_SECTION
))
1367 dwarf2_per_objfile
->info
.asection
= sectp
;
1368 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1370 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1372 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1373 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1375 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1377 dwarf2_per_objfile
->line
.asection
= sectp
;
1378 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1380 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1382 dwarf2_per_objfile
->loc
.asection
= sectp
;
1383 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1385 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1387 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1388 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1390 else if (section_is_p (sectp
->name
, STR_SECTION
))
1392 dwarf2_per_objfile
->str
.asection
= sectp
;
1393 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1395 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1397 dwarf2_per_objfile
->frame
.asection
= sectp
;
1398 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1400 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1402 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1404 if (aflag
& SEC_HAS_CONTENTS
)
1406 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1407 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1410 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1412 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1413 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1415 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1417 dwarf2_per_objfile
->types
.asection
= sectp
;
1418 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1420 else if (section_is_p (sectp
->name
, GDB_INDEX_SECTION
))
1422 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1423 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1426 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1427 && bfd_section_vma (abfd
, sectp
) == 0)
1428 dwarf2_per_objfile
->has_section_at_zero
= 1;
1431 /* Decompress a section that was compressed using zlib. Store the
1432 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1435 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1436 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1438 bfd
*abfd
= objfile
->obfd
;
1440 error (_("Support for zlib-compressed DWARF data (from '%s') "
1441 "is disabled in this copy of GDB"),
1442 bfd_get_filename (abfd
));
1444 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1445 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1446 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1447 bfd_size_type uncompressed_size
;
1448 gdb_byte
*uncompressed_buffer
;
1451 int header_size
= 12;
1453 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1454 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1455 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1456 bfd_get_filename (abfd
));
1458 /* Read the zlib header. In this case, it should be "ZLIB" followed
1459 by the uncompressed section size, 8 bytes in big-endian order. */
1460 if (compressed_size
< header_size
1461 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1462 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1463 bfd_get_filename (abfd
));
1464 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1465 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1466 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1467 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1468 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1469 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1470 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1471 uncompressed_size
+= compressed_buffer
[11];
1473 /* It is possible the section consists of several compressed
1474 buffers concatenated together, so we uncompress in a loop. */
1478 strm
.avail_in
= compressed_size
- header_size
;
1479 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1480 strm
.avail_out
= uncompressed_size
;
1481 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1483 rc
= inflateInit (&strm
);
1484 while (strm
.avail_in
> 0)
1487 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1488 bfd_get_filename (abfd
), rc
);
1489 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1490 + (uncompressed_size
- strm
.avail_out
));
1491 rc
= inflate (&strm
, Z_FINISH
);
1492 if (rc
!= Z_STREAM_END
)
1493 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1494 bfd_get_filename (abfd
), rc
);
1495 rc
= inflateReset (&strm
);
1497 rc
= inflateEnd (&strm
);
1499 || strm
.avail_out
!= 0)
1500 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1501 bfd_get_filename (abfd
), rc
);
1503 do_cleanups (cleanup
);
1504 *outbuf
= uncompressed_buffer
;
1505 *outsize
= uncompressed_size
;
1509 /* Read the contents of the section SECTP from object file specified by
1510 OBJFILE, store info about the section into INFO.
1511 If the section is compressed, uncompress it before returning. */
1514 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1516 bfd
*abfd
= objfile
->obfd
;
1517 asection
*sectp
= info
->asection
;
1518 gdb_byte
*buf
, *retbuf
;
1519 unsigned char header
[4];
1523 info
->buffer
= NULL
;
1524 info
->was_mmapped
= 0;
1527 if (info
->asection
== NULL
|| info
->size
== 0)
1530 /* Check if the file has a 4-byte header indicating compression. */
1531 if (info
->size
> sizeof (header
)
1532 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1533 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1535 /* Upon decompression, update the buffer and its size. */
1536 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1538 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1546 pagesize
= getpagesize ();
1548 /* Only try to mmap sections which are large enough: we don't want to
1549 waste space due to fragmentation. Also, only try mmap for sections
1550 without relocations. */
1552 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1554 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1555 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1556 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1557 MAP_PRIVATE
, pg_offset
);
1559 if (retbuf
!= MAP_FAILED
)
1561 info
->was_mmapped
= 1;
1562 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1563 #if HAVE_POSIX_MADVISE
1564 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1571 /* If we get here, we are a normal, not-compressed section. */
1573 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1575 /* When debugging .o files, we may need to apply relocations; see
1576 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1577 We never compress sections in .o files, so we only need to
1578 try this when the section is not compressed. */
1579 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1582 info
->buffer
= retbuf
;
1586 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1587 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1588 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1589 bfd_get_filename (abfd
));
1592 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1596 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1597 asection
**sectp
, gdb_byte
**bufp
,
1598 bfd_size_type
*sizep
)
1600 struct dwarf2_per_objfile
*data
1601 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1602 struct dwarf2_section_info
*info
;
1604 /* We may see an objfile without any DWARF, in which case we just
1613 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1614 info
= &data
->eh_frame
;
1615 else if (section_is_p (section_name
, FRAME_SECTION
))
1616 info
= &data
->frame
;
1618 gdb_assert_not_reached ("unexpected section");
1620 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1621 /* We haven't read this section in yet. Do it now. */
1622 dwarf2_read_section (objfile
, info
);
1624 *sectp
= info
->asection
;
1625 *bufp
= info
->buffer
;
1626 *sizep
= info
->size
;
1631 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1634 dw2_do_instantiate_symtab (struct objfile
*objfile
,
1635 struct dwarf2_per_cu_data
*per_cu
)
1637 struct cleanup
*back_to
;
1639 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1641 queue_comp_unit (per_cu
, objfile
);
1643 if (per_cu
->from_debug_types
)
1644 read_signatured_type_at_offset (objfile
, per_cu
->offset
);
1646 load_full_comp_unit (per_cu
, objfile
);
1648 process_queue (objfile
);
1650 /* Age the cache, releasing compilation units that have not
1651 been used recently. */
1652 age_cached_comp_units ();
1654 do_cleanups (back_to
);
1657 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1658 the objfile from which this CU came. Returns the resulting symbol
1660 static struct symtab
*
1661 dw2_instantiate_symtab (struct objfile
*objfile
,
1662 struct dwarf2_per_cu_data
*per_cu
)
1664 if (!per_cu
->v
.quick
->symtab
)
1666 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1667 increment_reading_symtab ();
1668 dw2_do_instantiate_symtab (objfile
, per_cu
);
1669 do_cleanups (back_to
);
1671 return per_cu
->v
.quick
->symtab
;
1674 /* Return the CU given its index. */
1675 static struct dwarf2_per_cu_data
*
1676 dw2_get_cu (int index
)
1678 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1680 index
-= dwarf2_per_objfile
->n_comp_units
;
1681 return dwarf2_per_objfile
->type_comp_units
[index
];
1683 return dwarf2_per_objfile
->all_comp_units
[index
];
1686 /* A helper function that knows how to read a 64-bit value in a way
1687 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1690 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1692 if (sizeof (ULONGEST
) < 8)
1696 /* Ignore the upper 4 bytes if they are all zero. */
1697 for (i
= 0; i
< 4; ++i
)
1698 if (bytes
[i
+ 4] != 0)
1701 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1704 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1708 /* Read the CU list from the mapped index, and use it to create all
1709 the CU objects for this objfile. Return 0 if something went wrong,
1710 1 if everything went ok. */
1712 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1713 offset_type cu_list_elements
)
1717 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1718 dwarf2_per_objfile
->all_comp_units
1719 = obstack_alloc (&objfile
->objfile_obstack
,
1720 dwarf2_per_objfile
->n_comp_units
1721 * sizeof (struct dwarf2_per_cu_data
*));
1723 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1725 struct dwarf2_per_cu_data
*the_cu
;
1726 ULONGEST offset
, length
;
1728 if (!extract_cu_value (cu_list
, &offset
)
1729 || !extract_cu_value (cu_list
+ 8, &length
))
1733 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1734 struct dwarf2_per_cu_data
);
1735 the_cu
->offset
= offset
;
1736 the_cu
->length
= length
;
1737 the_cu
->objfile
= objfile
;
1738 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1739 struct dwarf2_per_cu_quick_data
);
1740 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1746 /* Create the signatured type hash table from the index. */
1749 create_signatured_type_table_from_index (struct objfile
*objfile
,
1750 const gdb_byte
*bytes
,
1751 offset_type elements
)
1754 htab_t sig_types_hash
;
1756 dwarf2_per_objfile
->n_type_comp_units
= elements
/ 3;
1757 dwarf2_per_objfile
->type_comp_units
1758 = obstack_alloc (&objfile
->objfile_obstack
,
1759 dwarf2_per_objfile
->n_type_comp_units
1760 * sizeof (struct dwarf2_per_cu_data
*));
1762 sig_types_hash
= allocate_signatured_type_table (objfile
);
1764 for (i
= 0; i
< elements
; i
+= 3)
1766 struct signatured_type
*type_sig
;
1767 ULONGEST offset
, type_offset
, signature
;
1770 if (!extract_cu_value (bytes
, &offset
)
1771 || !extract_cu_value (bytes
+ 8, &type_offset
))
1773 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1776 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1777 struct signatured_type
);
1778 type_sig
->signature
= signature
;
1779 type_sig
->offset
= offset
;
1780 type_sig
->type_offset
= type_offset
;
1781 type_sig
->per_cu
.from_debug_types
= 1;
1782 type_sig
->per_cu
.offset
= offset
;
1783 type_sig
->per_cu
.objfile
= objfile
;
1784 type_sig
->per_cu
.v
.quick
1785 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1786 struct dwarf2_per_cu_quick_data
);
1788 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1791 dwarf2_per_objfile
->type_comp_units
[i
/ 3] = &type_sig
->per_cu
;
1794 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1799 /* Read the address map data from the mapped index, and use it to
1800 populate the objfile's psymtabs_addrmap. */
1802 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1804 const gdb_byte
*iter
, *end
;
1805 struct obstack temp_obstack
;
1806 struct addrmap
*mutable_map
;
1807 struct cleanup
*cleanup
;
1810 obstack_init (&temp_obstack
);
1811 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1812 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1814 iter
= index
->address_table
;
1815 end
= iter
+ index
->address_table_size
;
1817 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1821 ULONGEST hi
, lo
, cu_index
;
1822 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1824 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1826 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1829 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1830 dw2_get_cu (cu_index
));
1833 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1834 &objfile
->objfile_obstack
);
1835 do_cleanups (cleanup
);
1838 /* The hash function for strings in the mapped index. This is the
1839 same as the hashtab.c hash function, but we keep a separate copy to
1840 maintain control over the implementation. This is necessary
1841 because the hash function is tied to the format of the mapped index
1844 mapped_index_string_hash (const void *p
)
1846 const unsigned char *str
= (const unsigned char *) p
;
1850 while ((c
= *str
++) != 0)
1851 r
= r
* 67 + c
- 113;
1856 /* Find a slot in the mapped index INDEX for the object named NAME.
1857 If NAME is found, set *VEC_OUT to point to the CU vector in the
1858 constant pool and return 1. If NAME cannot be found, return 0. */
1860 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
1861 offset_type
**vec_out
)
1863 offset_type hash
= mapped_index_string_hash (name
);
1864 offset_type slot
, step
;
1866 slot
= hash
& (index
->index_table_slots
- 1);
1867 step
= ((hash
* 17) & (index
->index_table_slots
- 1)) | 1;
1871 /* Convert a slot number to an offset into the table. */
1872 offset_type i
= 2 * slot
;
1874 if (index
->index_table
[i
] == 0 && index
->index_table
[i
+ 1] == 0)
1877 str
= index
->constant_pool
+ MAYBE_SWAP (index
->index_table
[i
]);
1878 if (!strcmp (name
, str
))
1880 *vec_out
= (offset_type
*) (index
->constant_pool
1881 + MAYBE_SWAP (index
->index_table
[i
+ 1]));
1885 slot
= (slot
+ step
) & (index
->index_table_slots
- 1);
1889 /* Read the index file. If everything went ok, initialize the "quick"
1890 elements of all the CUs and return 1. Otherwise, return 0. */
1892 dwarf2_read_index (struct objfile
*objfile
)
1895 struct mapped_index
*map
;
1896 offset_type
*metadata
;
1897 const gdb_byte
*cu_list
;
1898 const gdb_byte
*types_list
= NULL
;
1899 offset_type version
, cu_list_elements
;
1900 offset_type types_list_elements
= 0;
1903 if (dwarf2_per_objfile
->gdb_index
.asection
== NULL
1904 || dwarf2_per_objfile
->gdb_index
.size
== 0)
1907 /* Older elfutils strip versions could keep the section in the main
1908 executable while splitting it for the separate debug info file. */
1909 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
1910 & SEC_HAS_CONTENTS
) == 0)
1913 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
1915 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
1916 /* Version check. */
1917 version
= MAYBE_SWAP (*(offset_type
*) addr
);
1920 /* Index version 1 neglected to account for .debug_types. So,
1921 if we see .debug_types, we cannot use this index. */
1922 if (dwarf2_per_objfile
->types
.asection
!= NULL
1923 && dwarf2_per_objfile
->types
.size
!= 0)
1926 else if (version
!= 2)
1929 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
1930 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
1932 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
1935 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1936 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
1942 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1943 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
1944 - MAYBE_SWAP (metadata
[i
]))
1949 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
1950 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
1951 - MAYBE_SWAP (metadata
[i
]));
1954 map
->index_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
1955 map
->index_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
1956 - MAYBE_SWAP (metadata
[i
]))
1957 / (2 * sizeof (offset_type
)));
1960 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
1962 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
1966 && types_list_elements
1967 && !create_signatured_type_table_from_index (objfile
, types_list
,
1968 types_list_elements
))
1971 create_addrmap_from_index (objfile
, map
);
1973 dwarf2_per_objfile
->index_table
= map
;
1974 dwarf2_per_objfile
->using_index
= 1;
1979 /* A helper for the "quick" functions which sets the global
1980 dwarf2_per_objfile according to OBJFILE. */
1982 dw2_setup (struct objfile
*objfile
)
1984 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1985 gdb_assert (dwarf2_per_objfile
);
1988 /* A helper for the "quick" functions which attempts to read the line
1989 table for THIS_CU. */
1991 dw2_require_line_header (struct objfile
*objfile
,
1992 struct dwarf2_per_cu_data
*this_cu
)
1994 bfd
*abfd
= objfile
->obfd
;
1995 struct line_header
*lh
= NULL
;
1996 struct attribute
*attr
;
1997 struct cleanup
*cleanups
;
1998 struct die_info
*comp_unit_die
;
1999 struct dwarf2_section_info
* sec
;
2000 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
2001 int has_children
, i
;
2002 struct dwarf2_cu cu
;
2003 unsigned int bytes_read
, buffer_size
;
2004 struct die_reader_specs reader_specs
;
2005 char *name
, *comp_dir
;
2007 if (this_cu
->v
.quick
->read_lines
)
2009 this_cu
->v
.quick
->read_lines
= 1;
2011 memset (&cu
, 0, sizeof (cu
));
2012 cu
.objfile
= objfile
;
2013 obstack_init (&cu
.comp_unit_obstack
);
2015 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2017 if (this_cu
->from_debug_types
)
2018 sec
= &dwarf2_per_objfile
->types
;
2020 sec
= &dwarf2_per_objfile
->info
;
2021 dwarf2_read_section (objfile
, sec
);
2022 buffer_size
= sec
->size
;
2023 buffer
= sec
->buffer
;
2024 info_ptr
= buffer
+ this_cu
->offset
;
2025 beg_of_comp_unit
= info_ptr
;
2027 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2028 buffer
, buffer_size
,
2031 /* Complete the cu_header. */
2032 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2033 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2036 cu
.per_cu
= this_cu
;
2038 dwarf2_read_abbrevs (abfd
, &cu
);
2039 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2041 if (this_cu
->from_debug_types
)
2042 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2043 init_cu_die_reader (&reader_specs
, &cu
);
2044 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2047 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2050 unsigned int line_offset
= DW_UNSND (attr
);
2051 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2055 do_cleanups (cleanups
);
2059 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2061 this_cu
->v
.quick
->lines
= lh
;
2063 this_cu
->v
.quick
->file_names
2064 = obstack_alloc (&objfile
->objfile_obstack
,
2065 lh
->num_file_names
* sizeof (char *));
2066 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2067 this_cu
->v
.quick
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2069 do_cleanups (cleanups
);
2072 /* A helper for the "quick" functions which computes and caches the
2073 real path for a given file name from the line table.
2074 dw2_require_line_header must have been called before this is
2077 dw2_require_full_path (struct objfile
*objfile
,
2078 struct dwarf2_per_cu_data
*per_cu
,
2081 if (!per_cu
->v
.quick
->full_names
)
2082 per_cu
->v
.quick
->full_names
2083 = OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2084 per_cu
->v
.quick
->lines
->num_file_names
,
2087 if (!per_cu
->v
.quick
->full_names
[index
])
2088 per_cu
->v
.quick
->full_names
[index
]
2089 = gdb_realpath (per_cu
->v
.quick
->file_names
[index
]);
2091 return per_cu
->v
.quick
->full_names
[index
];
2094 static struct symtab
*
2095 dw2_find_last_source_symtab (struct objfile
*objfile
)
2098 dw2_setup (objfile
);
2099 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2100 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2104 dw2_forget_cached_source_info (struct objfile
*objfile
)
2108 dw2_setup (objfile
);
2109 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2110 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2112 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2114 if (per_cu
->v
.quick
->full_names
)
2118 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2119 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
2125 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2126 const char *full_path
, const char *real_path
,
2127 struct symtab
**result
)
2130 int check_basename
= lbasename (name
) == name
;
2131 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2133 dw2_setup (objfile
);
2134 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2135 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2138 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2140 if (per_cu
->v
.quick
->symtab
)
2143 dw2_require_line_header (objfile
, per_cu
);
2144 if (!per_cu
->v
.quick
->lines
)
2147 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2149 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2151 if (FILENAME_CMP (name
, this_name
) == 0)
2153 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2157 if (check_basename
&& ! base_cu
2158 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2161 if (full_path
!= NULL
)
2163 const char *this_full_name
= dw2_require_full_path (objfile
,
2167 && FILENAME_CMP (full_path
, this_full_name
) == 0)
2169 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2174 if (real_path
!= NULL
)
2176 const char *this_full_name
= dw2_require_full_path (objfile
,
2179 if (this_full_name
!= NULL
)
2181 char *rp
= gdb_realpath (this_full_name
);
2182 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
2185 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2196 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2203 static struct symtab
*
2204 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2205 const char *name
, domain_enum domain
)
2207 /* We do all the work in the pre_expand_symtabs_matching hook
2212 /* A helper function that expands all symtabs that hold an object
2215 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2217 dw2_setup (objfile
);
2219 if (dwarf2_per_objfile
->index_table
)
2223 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2226 offset_type i
, len
= MAYBE_SWAP (*vec
);
2227 for (i
= 0; i
< len
; ++i
)
2229 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2230 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2232 dw2_instantiate_symtab (objfile
, per_cu
);
2239 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2240 int kind
, const char *name
,
2243 dw2_do_expand_symtabs_matching (objfile
, name
);
2247 dw2_print_stats (struct objfile
*objfile
)
2251 dw2_setup (objfile
);
2253 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2254 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2256 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2258 if (!per_cu
->v
.quick
->symtab
)
2261 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2265 dw2_dump (struct objfile
*objfile
)
2267 /* Nothing worth printing. */
2271 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2272 struct section_offsets
*delta
)
2274 /* There's nothing to relocate here. */
2278 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2279 const char *func_name
)
2281 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2285 dw2_expand_all_symtabs (struct objfile
*objfile
)
2289 dw2_setup (objfile
);
2291 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2292 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2294 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2296 dw2_instantiate_symtab (objfile
, per_cu
);
2301 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2302 const char *filename
)
2306 dw2_setup (objfile
);
2307 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2308 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2311 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2313 if (per_cu
->v
.quick
->symtab
)
2316 dw2_require_line_header (objfile
, per_cu
);
2317 if (!per_cu
->v
.quick
->lines
)
2320 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2322 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2323 if (strcmp (this_name
, filename
) == 0)
2325 dw2_instantiate_symtab (objfile
, per_cu
);
2333 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2335 struct dwarf2_per_cu_data
*per_cu
;
2338 dw2_setup (objfile
);
2340 if (!dwarf2_per_objfile
->index_table
)
2343 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2347 /* Note that this just looks at the very first one named NAME -- but
2348 actually we are looking for a function. find_main_filename
2349 should be rewritten so that it doesn't require a custom hook. It
2350 could just use the ordinary symbol tables. */
2351 /* vec[0] is the length, which must always be >0. */
2352 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2354 dw2_require_line_header (objfile
, per_cu
);
2355 if (!per_cu
->v
.quick
->lines
)
2358 return per_cu
->v
.quick
->file_names
[per_cu
->v
.quick
->lines
->num_file_names
- 1];
2362 dw2_map_ada_symtabs (struct objfile
*objfile
,
2363 int (*wild_match
) (const char *, int, const char *),
2364 int (*is_name_suffix
) (const char *),
2365 void (*callback
) (struct objfile
*,
2366 struct symtab
*, void *),
2367 const char *name
, int global
,
2368 domain_enum
namespace, int wild
,
2371 /* For now, we don't support Ada. Still the function can be called if the
2372 current language is Ada for a non-Ada objfile using GNU index. As Ada
2373 does not look for non-Ada symbols this function should just return. */
2377 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2378 int (*file_matcher
) (const char *, void *),
2379 int (*name_matcher
) (const char *, void *),
2386 dw2_setup (objfile
);
2387 if (!dwarf2_per_objfile
->index_table
)
2390 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2391 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2394 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2396 per_cu
->v
.quick
->mark
= 0;
2397 if (per_cu
->v
.quick
->symtab
)
2400 dw2_require_line_header (objfile
, per_cu
);
2401 if (!per_cu
->v
.quick
->lines
)
2404 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2406 if (file_matcher (per_cu
->v
.quick
->file_names
[j
], data
))
2408 per_cu
->v
.quick
->mark
= 1;
2415 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2418 offset_type idx
= 2 * iter
;
2420 offset_type
*vec
, vec_len
, vec_idx
;
2422 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2423 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2426 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2427 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2429 if (! (*name_matcher
) (name
, data
))
2432 /* The name was matched, now expand corresponding CUs that were
2434 vec
= (offset_type
*) (dwarf2_per_objfile
->index_table
->constant_pool
2435 + dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1]);
2436 vec_len
= MAYBE_SWAP (vec
[0]);
2437 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2439 struct dwarf2_per_cu_data
*per_cu
;
2441 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2442 if (per_cu
->v
.quick
->mark
)
2443 dw2_instantiate_symtab (objfile
, per_cu
);
2448 static struct symtab
*
2449 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2450 struct minimal_symbol
*msymbol
,
2452 struct obj_section
*section
,
2455 struct dwarf2_per_cu_data
*data
;
2457 dw2_setup (objfile
);
2459 if (!objfile
->psymtabs_addrmap
)
2462 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2466 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2467 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2468 paddress (get_objfile_arch (objfile
), pc
));
2470 return dw2_instantiate_symtab (objfile
, data
);
2474 dw2_map_symbol_names (struct objfile
*objfile
,
2475 void (*fun
) (const char *, void *),
2479 dw2_setup (objfile
);
2481 if (!dwarf2_per_objfile
->index_table
)
2485 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2488 offset_type idx
= 2 * iter
;
2490 offset_type
*vec
, vec_len
, vec_idx
;
2492 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2493 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2496 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2497 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2499 (*fun
) (name
, data
);
2504 dw2_map_symbol_filenames (struct objfile
*objfile
,
2505 void (*fun
) (const char *, const char *, void *),
2510 dw2_setup (objfile
);
2511 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2512 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2515 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2517 if (per_cu
->v
.quick
->symtab
)
2520 dw2_require_line_header (objfile
, per_cu
);
2521 if (!per_cu
->v
.quick
->lines
)
2524 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2526 const char *this_full_name
= dw2_require_full_path (objfile
, per_cu
,
2528 (*fun
) (per_cu
->v
.quick
->file_names
[j
], this_full_name
, data
);
2534 dw2_has_symbols (struct objfile
*objfile
)
2539 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2542 dw2_find_last_source_symtab
,
2543 dw2_forget_cached_source_info
,
2546 dw2_pre_expand_symtabs_matching
,
2550 dw2_expand_symtabs_for_function
,
2551 dw2_expand_all_symtabs
,
2552 dw2_expand_symtabs_with_filename
,
2553 dw2_find_symbol_file
,
2554 dw2_map_ada_symtabs
,
2555 dw2_expand_symtabs_matching
,
2556 dw2_find_pc_sect_symtab
,
2557 dw2_map_symbol_names
,
2558 dw2_map_symbol_filenames
2561 /* Initialize for reading DWARF for this objfile. Return 0 if this
2562 file will use psymtabs, or 1 if using the GNU index. */
2565 dwarf2_initialize_objfile (struct objfile
*objfile
)
2567 /* If we're about to read full symbols, don't bother with the
2568 indices. In this case we also don't care if some other debug
2569 format is making psymtabs, because they are all about to be
2571 if ((objfile
->flags
& OBJF_READNOW
))
2575 dwarf2_per_objfile
->using_index
= 1;
2576 create_all_comp_units (objfile
);
2577 create_debug_types_hash_table (objfile
);
2579 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2580 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2582 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2584 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2585 struct dwarf2_per_cu_quick_data
);
2588 /* Return 1 so that gdb sees the "quick" functions. However,
2589 these functions will be no-ops because we will have expanded
2594 if (dwarf2_read_index (objfile
))
2597 dwarf2_build_psymtabs (objfile
);
2603 /* Build a partial symbol table. */
2606 dwarf2_build_psymtabs (struct objfile
*objfile
)
2608 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2610 init_psymbol_list (objfile
, 1024);
2613 dwarf2_build_psymtabs_hard (objfile
);
2616 /* Return TRUE if OFFSET is within CU_HEADER. */
2619 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2621 unsigned int bottom
= cu_header
->offset
;
2622 unsigned int top
= (cu_header
->offset
2624 + cu_header
->initial_length_size
);
2626 return (offset
>= bottom
&& offset
< top
);
2629 /* Read in the comp unit header information from the debug_info at info_ptr.
2630 NOTE: This leaves members offset, first_die_offset to be filled in
2634 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2635 gdb_byte
*info_ptr
, bfd
*abfd
)
2638 unsigned int bytes_read
;
2640 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2641 cu_header
->initial_length_size
= bytes_read
;
2642 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2643 info_ptr
+= bytes_read
;
2644 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2646 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2648 info_ptr
+= bytes_read
;
2649 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2651 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2652 if (signed_addr
< 0)
2653 internal_error (__FILE__
, __LINE__
,
2654 _("read_comp_unit_head: dwarf from non elf file"));
2655 cu_header
->signed_addr_p
= signed_addr
;
2661 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2662 gdb_byte
*buffer
, unsigned int buffer_size
,
2665 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2667 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2669 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2670 error (_("Dwarf Error: wrong version in compilation unit header "
2671 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2672 bfd_get_filename (abfd
));
2674 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2675 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2676 "(offset 0x%lx + 6) [in module %s]"),
2677 (long) header
->abbrev_offset
,
2678 (long) (beg_of_comp_unit
- buffer
),
2679 bfd_get_filename (abfd
));
2681 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2682 > buffer
+ buffer_size
)
2683 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2684 "(offset 0x%lx + 0) [in module %s]"),
2685 (long) header
->length
,
2686 (long) (beg_of_comp_unit
- buffer
),
2687 bfd_get_filename (abfd
));
2692 /* Read in the types comp unit header information from .debug_types entry at
2693 types_ptr. The result is a pointer to one past the end of the header. */
2696 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2697 ULONGEST
*signature
,
2698 gdb_byte
*types_ptr
, bfd
*abfd
)
2700 gdb_byte
*initial_types_ptr
= types_ptr
;
2702 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2703 &dwarf2_per_objfile
->types
);
2704 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2706 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2708 *signature
= read_8_bytes (abfd
, types_ptr
);
2710 types_ptr
+= cu_header
->offset_size
;
2711 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2716 /* Allocate a new partial symtab for file named NAME and mark this new
2717 partial symtab as being an include of PST. */
2720 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2721 struct objfile
*objfile
)
2723 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2725 subpst
->section_offsets
= pst
->section_offsets
;
2726 subpst
->textlow
= 0;
2727 subpst
->texthigh
= 0;
2729 subpst
->dependencies
= (struct partial_symtab
**)
2730 obstack_alloc (&objfile
->objfile_obstack
,
2731 sizeof (struct partial_symtab
*));
2732 subpst
->dependencies
[0] = pst
;
2733 subpst
->number_of_dependencies
= 1;
2735 subpst
->globals_offset
= 0;
2736 subpst
->n_global_syms
= 0;
2737 subpst
->statics_offset
= 0;
2738 subpst
->n_static_syms
= 0;
2739 subpst
->symtab
= NULL
;
2740 subpst
->read_symtab
= pst
->read_symtab
;
2743 /* No private part is necessary for include psymtabs. This property
2744 can be used to differentiate between such include psymtabs and
2745 the regular ones. */
2746 subpst
->read_symtab_private
= NULL
;
2749 /* Read the Line Number Program data and extract the list of files
2750 included by the source file represented by PST. Build an include
2751 partial symtab for each of these included files. */
2754 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2755 struct die_info
*die
,
2756 struct partial_symtab
*pst
)
2758 struct objfile
*objfile
= cu
->objfile
;
2759 bfd
*abfd
= objfile
->obfd
;
2760 struct line_header
*lh
= NULL
;
2761 struct attribute
*attr
;
2763 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2766 unsigned int line_offset
= DW_UNSND (attr
);
2768 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2771 return; /* No linetable, so no includes. */
2773 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2774 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2776 free_line_header (lh
);
2780 hash_type_signature (const void *item
)
2782 const struct signatured_type
*type_sig
= item
;
2784 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2785 return type_sig
->signature
;
2789 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2791 const struct signatured_type
*lhs
= item_lhs
;
2792 const struct signatured_type
*rhs
= item_rhs
;
2794 return lhs
->signature
== rhs
->signature
;
2797 /* Allocate a hash table for signatured types. */
2800 allocate_signatured_type_table (struct objfile
*objfile
)
2802 return htab_create_alloc_ex (41,
2803 hash_type_signature
,
2806 &objfile
->objfile_obstack
,
2807 hashtab_obstack_allocate
,
2808 dummy_obstack_deallocate
);
2811 /* A helper function to add a signatured type CU to a list. */
2814 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2816 struct signatured_type
*sigt
= *slot
;
2817 struct dwarf2_per_cu_data
***datap
= datum
;
2819 **datap
= &sigt
->per_cu
;
2825 /* Create the hash table of all entries in the .debug_types section.
2826 The result is zero if there is an error (e.g. missing .debug_types section),
2827 otherwise non-zero. */
2830 create_debug_types_hash_table (struct objfile
*objfile
)
2834 struct dwarf2_per_cu_data
**iter
;
2836 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2837 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2839 if (info_ptr
== NULL
)
2841 dwarf2_per_objfile
->signatured_types
= NULL
;
2845 types_htab
= allocate_signatured_type_table (objfile
);
2847 if (dwarf2_die_debug
)
2848 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
2850 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2852 unsigned int offset
;
2853 unsigned int offset_size
;
2854 unsigned int type_offset
;
2855 unsigned int length
, initial_length_size
;
2856 unsigned short version
;
2858 struct signatured_type
*type_sig
;
2860 gdb_byte
*ptr
= info_ptr
;
2862 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
2864 /* We need to read the type's signature in order to build the hash
2865 table, but we don't need to read anything else just yet. */
2867 /* Sanity check to ensure entire cu is present. */
2868 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
2869 if (ptr
+ length
+ initial_length_size
2870 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2872 complaint (&symfile_complaints
,
2873 _("debug type entry runs off end of `.debug_types' section, ignored"));
2877 offset_size
= initial_length_size
== 4 ? 4 : 8;
2878 ptr
+= initial_length_size
;
2879 version
= bfd_get_16 (objfile
->obfd
, ptr
);
2881 ptr
+= offset_size
; /* abbrev offset */
2882 ptr
+= 1; /* address size */
2883 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
2885 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
2887 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
2888 memset (type_sig
, 0, sizeof (*type_sig
));
2889 type_sig
->signature
= signature
;
2890 type_sig
->offset
= offset
;
2891 type_sig
->type_offset
= type_offset
;
2892 type_sig
->per_cu
.objfile
= objfile
;
2893 type_sig
->per_cu
.from_debug_types
= 1;
2895 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
2896 gdb_assert (slot
!= NULL
);
2899 if (dwarf2_die_debug
)
2900 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
2901 offset
, phex (signature
, sizeof (signature
)));
2903 info_ptr
= info_ptr
+ initial_length_size
+ length
;
2906 dwarf2_per_objfile
->signatured_types
= types_htab
;
2908 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
2909 dwarf2_per_objfile
->type_comp_units
2910 = obstack_alloc (&objfile
->objfile_obstack
,
2911 dwarf2_per_objfile
->n_type_comp_units
2912 * sizeof (struct dwarf2_per_cu_data
*));
2913 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
2914 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
2915 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
2916 == dwarf2_per_objfile
->n_type_comp_units
);
2921 /* Lookup a signature based type.
2922 Returns NULL if SIG is not present in the table. */
2924 static struct signatured_type
*
2925 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
2927 struct signatured_type find_entry
, *entry
;
2929 if (dwarf2_per_objfile
->signatured_types
== NULL
)
2931 complaint (&symfile_complaints
,
2932 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2936 find_entry
.signature
= sig
;
2937 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
2941 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2944 init_cu_die_reader (struct die_reader_specs
*reader
,
2945 struct dwarf2_cu
*cu
)
2947 reader
->abfd
= cu
->objfile
->obfd
;
2949 if (cu
->per_cu
->from_debug_types
)
2951 gdb_assert (dwarf2_per_objfile
->types
.readin
);
2952 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
2956 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2957 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
2961 /* Find the base address of the compilation unit for range lists and
2962 location lists. It will normally be specified by DW_AT_low_pc.
2963 In DWARF-3 draft 4, the base address could be overridden by
2964 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2965 compilation units with discontinuous ranges. */
2968 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
2970 struct attribute
*attr
;
2973 cu
->base_address
= 0;
2975 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
2978 cu
->base_address
= DW_ADDR (attr
);
2983 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
2986 cu
->base_address
= DW_ADDR (attr
);
2992 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2993 to combine the common parts.
2994 Process a compilation unit for a psymtab.
2995 BUFFER is a pointer to the beginning of the dwarf section buffer,
2996 either .debug_info or debug_types.
2997 INFO_PTR is a pointer to the start of the CU.
2998 Returns a pointer to the next CU. */
3001 process_psymtab_comp_unit (struct objfile
*objfile
,
3002 struct dwarf2_per_cu_data
*this_cu
,
3003 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3004 unsigned int buffer_size
)
3006 bfd
*abfd
= objfile
->obfd
;
3007 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3008 struct die_info
*comp_unit_die
;
3009 struct partial_symtab
*pst
;
3011 struct cleanup
*back_to_inner
;
3012 struct dwarf2_cu cu
;
3013 int has_children
, has_pc_info
;
3014 struct attribute
*attr
;
3015 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3016 struct die_reader_specs reader_specs
;
3018 memset (&cu
, 0, sizeof (cu
));
3019 cu
.objfile
= objfile
;
3020 obstack_init (&cu
.comp_unit_obstack
);
3022 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3024 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3025 buffer
, buffer_size
,
3028 /* Complete the cu_header. */
3029 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3030 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3032 cu
.list_in_scope
= &file_symbols
;
3034 /* If this compilation unit was already read in, free the
3035 cached copy in order to read it in again. This is
3036 necessary because we skipped some symbols when we first
3037 read in the compilation unit (see load_partial_dies).
3038 This problem could be avoided, but the benefit is
3040 if (this_cu
->cu
!= NULL
)
3041 free_one_cached_comp_unit (this_cu
->cu
);
3043 /* Note that this is a pointer to our stack frame, being
3044 added to a global data structure. It will be cleaned up
3045 in free_stack_comp_unit when we finish with this
3046 compilation unit. */
3048 cu
.per_cu
= this_cu
;
3050 /* Read the abbrevs for this compilation unit into a table. */
3051 dwarf2_read_abbrevs (abfd
, &cu
);
3052 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3054 /* Read the compilation unit die. */
3055 if (this_cu
->from_debug_types
)
3056 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3057 init_cu_die_reader (&reader_specs
, &cu
);
3058 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3061 if (this_cu
->from_debug_types
)
3063 /* offset,length haven't been set yet for type units. */
3064 this_cu
->offset
= cu
.header
.offset
;
3065 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3067 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3069 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3070 + cu
.header
.initial_length_size
);
3071 do_cleanups (back_to_inner
);
3075 /* Set the language we're debugging. */
3076 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
3078 set_cu_language (DW_UNSND (attr
), &cu
);
3080 set_cu_language (language_minimal
, &cu
);
3082 /* Allocate a new partial symbol table structure. */
3083 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3084 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3085 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3086 /* TEXTLOW and TEXTHIGH are set below. */
3088 objfile
->global_psymbols
.next
,
3089 objfile
->static_psymbols
.next
);
3091 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3093 pst
->dirname
= DW_STRING (attr
);
3095 pst
->read_symtab_private
= this_cu
;
3097 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3099 /* Store the function that reads in the rest of the symbol table */
3100 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3102 this_cu
->v
.psymtab
= pst
;
3104 dwarf2_find_base_address (comp_unit_die
, &cu
);
3106 /* Possibly set the default values of LOWPC and HIGHPC from
3108 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3109 &best_highpc
, &cu
, pst
);
3110 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3111 /* Store the contiguous range if it is not empty; it can be empty for
3112 CUs with no code. */
3113 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3114 best_lowpc
+ baseaddr
,
3115 best_highpc
+ baseaddr
- 1, pst
);
3117 /* Check if comp unit has_children.
3118 If so, read the rest of the partial symbols from this comp unit.
3119 If not, there's no more debug_info for this comp unit. */
3122 struct partial_die_info
*first_die
;
3123 CORE_ADDR lowpc
, highpc
;
3125 lowpc
= ((CORE_ADDR
) -1);
3126 highpc
= ((CORE_ADDR
) 0);
3128 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3130 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3131 ! has_pc_info
, &cu
);
3133 /* If we didn't find a lowpc, set it to highpc to avoid
3134 complaints from `maint check'. */
3135 if (lowpc
== ((CORE_ADDR
) -1))
3138 /* If the compilation unit didn't have an explicit address range,
3139 then use the information extracted from its child dies. */
3143 best_highpc
= highpc
;
3146 pst
->textlow
= best_lowpc
+ baseaddr
;
3147 pst
->texthigh
= best_highpc
+ baseaddr
;
3149 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3150 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3151 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3152 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3153 sort_pst_symbols (pst
);
3155 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3156 + cu
.header
.initial_length_size
);
3158 if (this_cu
->from_debug_types
)
3160 /* It's not clear we want to do anything with stmt lists here.
3161 Waiting to see what gcc ultimately does. */
3165 /* Get the list of files included in the current compilation unit,
3166 and build a psymtab for each of them. */
3167 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3170 do_cleanups (back_to_inner
);
3175 /* Traversal function for htab_traverse_noresize.
3176 Process one .debug_types comp-unit. */
3179 process_type_comp_unit (void **slot
, void *info
)
3181 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3182 struct objfile
*objfile
= (struct objfile
*) info
;
3183 struct dwarf2_per_cu_data
*this_cu
;
3185 this_cu
= &entry
->per_cu
;
3187 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3188 process_psymtab_comp_unit (objfile
, this_cu
,
3189 dwarf2_per_objfile
->types
.buffer
,
3190 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3191 dwarf2_per_objfile
->types
.size
);
3196 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3197 Build partial symbol tables for the .debug_types comp-units. */
3200 build_type_psymtabs (struct objfile
*objfile
)
3202 if (! create_debug_types_hash_table (objfile
))
3205 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3206 process_type_comp_unit
, objfile
);
3209 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3212 psymtabs_addrmap_cleanup (void *o
)
3214 struct objfile
*objfile
= o
;
3216 objfile
->psymtabs_addrmap
= NULL
;
3219 /* Build the partial symbol table by doing a quick pass through the
3220 .debug_info and .debug_abbrev sections. */
3223 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3226 struct cleanup
*back_to
, *addrmap_cleanup
;
3227 struct obstack temp_obstack
;
3229 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3231 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3232 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3234 /* Any cached compilation units will be linked by the per-objfile
3235 read_in_chain. Make sure to free them when we're done. */
3236 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3238 build_type_psymtabs (objfile
);
3240 create_all_comp_units (objfile
);
3242 /* Create a temporary address map on a temporary obstack. We later
3243 copy this to the final obstack. */
3244 obstack_init (&temp_obstack
);
3245 make_cleanup_obstack_free (&temp_obstack
);
3246 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3247 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3249 /* Since the objects we're extracting from .debug_info vary in
3250 length, only the individual functions to extract them (like
3251 read_comp_unit_head and load_partial_die) can really know whether
3252 the buffer is large enough to hold another complete object.
3254 At the moment, they don't actually check that. If .debug_info
3255 holds just one extra byte after the last compilation unit's dies,
3256 then read_comp_unit_head will happily read off the end of the
3257 buffer. read_partial_die is similarly casual. Those functions
3260 For this loop condition, simply checking whether there's any data
3261 left at all should be sufficient. */
3263 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3264 + dwarf2_per_objfile
->info
.size
))
3266 struct dwarf2_per_cu_data
*this_cu
;
3268 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
3271 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3272 dwarf2_per_objfile
->info
.buffer
,
3274 dwarf2_per_objfile
->info
.size
);
3277 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3278 &objfile
->objfile_obstack
);
3279 discard_cleanups (addrmap_cleanup
);
3281 do_cleanups (back_to
);
3284 /* Load the partial DIEs for a secondary CU into memory. */
3287 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3288 struct objfile
*objfile
)
3290 bfd
*abfd
= objfile
->obfd
;
3291 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3292 struct die_info
*comp_unit_die
;
3293 struct dwarf2_cu
*cu
;
3294 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3295 struct attribute
*attr
;
3297 struct die_reader_specs reader_specs
;
3300 gdb_assert (! this_cu
->from_debug_types
);
3302 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3303 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3304 beg_of_comp_unit
= info_ptr
;
3306 if (this_cu
->cu
== NULL
)
3308 cu
= alloc_one_comp_unit (objfile
);
3312 /* If an error occurs while loading, release our storage. */
3313 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3315 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3316 dwarf2_per_objfile
->info
.buffer
,
3317 dwarf2_per_objfile
->info
.size
,
3320 /* Complete the cu_header. */
3321 cu
->header
.offset
= this_cu
->offset
;
3322 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3324 /* Link this compilation unit into the compilation unit tree. */
3326 cu
->per_cu
= this_cu
;
3328 /* Link this CU into read_in_chain. */
3329 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3330 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3335 info_ptr
+= cu
->header
.first_die_offset
;
3338 /* Read the abbrevs for this compilation unit into a table. */
3339 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3340 dwarf2_read_abbrevs (abfd
, cu
);
3341 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3343 /* Read the compilation unit die. */
3344 init_cu_die_reader (&reader_specs
, cu
);
3345 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3348 /* Set the language we're debugging. */
3349 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
3351 set_cu_language (DW_UNSND (attr
), cu
);
3353 set_cu_language (language_minimal
, cu
);
3355 /* Check if comp unit has_children.
3356 If so, read the rest of the partial symbols from this comp unit.
3357 If not, there's no more debug_info for this comp unit. */
3359 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3361 do_cleanups (free_abbrevs_cleanup
);
3365 /* We've successfully allocated this compilation unit. Let our
3366 caller clean it up when finished with it. */
3367 discard_cleanups (free_cu_cleanup
);
3371 /* Create a list of all compilation units in OBJFILE. We do this only
3372 if an inter-comp-unit reference is found; presumably if there is one,
3373 there will be many, and one will occur early in the .debug_info section.
3374 So there's no point in building this list incrementally. */
3377 create_all_comp_units (struct objfile
*objfile
)
3381 struct dwarf2_per_cu_data
**all_comp_units
;
3384 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3385 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3389 all_comp_units
= xmalloc (n_allocated
3390 * sizeof (struct dwarf2_per_cu_data
*));
3392 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
3394 unsigned int length
, initial_length_size
;
3395 struct dwarf2_per_cu_data
*this_cu
;
3396 unsigned int offset
;
3398 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3400 /* Read just enough information to find out where the next
3401 compilation unit is. */
3402 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3403 &initial_length_size
);
3405 /* Save the compilation unit for later lookup. */
3406 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3407 sizeof (struct dwarf2_per_cu_data
));
3408 memset (this_cu
, 0, sizeof (*this_cu
));
3409 this_cu
->offset
= offset
;
3410 this_cu
->length
= length
+ initial_length_size
;
3411 this_cu
->objfile
= objfile
;
3413 if (n_comp_units
== n_allocated
)
3416 all_comp_units
= xrealloc (all_comp_units
,
3418 * sizeof (struct dwarf2_per_cu_data
*));
3420 all_comp_units
[n_comp_units
++] = this_cu
;
3422 info_ptr
= info_ptr
+ this_cu
->length
;
3425 dwarf2_per_objfile
->all_comp_units
3426 = obstack_alloc (&objfile
->objfile_obstack
,
3427 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3428 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3429 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3430 xfree (all_comp_units
);
3431 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3434 /* Process all loaded DIEs for compilation unit CU, starting at
3435 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3436 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3437 DW_AT_ranges). If NEED_PC is set, then this function will set
3438 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3439 and record the covered ranges in the addrmap. */
3442 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3443 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3445 struct partial_die_info
*pdi
;
3447 /* Now, march along the PDI's, descending into ones which have
3448 interesting children but skipping the children of the other ones,
3449 until we reach the end of the compilation unit. */
3455 fixup_partial_die (pdi
, cu
);
3457 /* Anonymous namespaces or modules have no name but have interesting
3458 children, so we need to look at them. Ditto for anonymous
3461 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3462 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3466 case DW_TAG_subprogram
:
3467 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3469 case DW_TAG_variable
:
3470 case DW_TAG_typedef
:
3471 case DW_TAG_union_type
:
3472 if (!pdi
->is_declaration
)
3474 add_partial_symbol (pdi
, cu
);
3477 case DW_TAG_class_type
:
3478 case DW_TAG_interface_type
:
3479 case DW_TAG_structure_type
:
3480 if (!pdi
->is_declaration
)
3482 add_partial_symbol (pdi
, cu
);
3485 case DW_TAG_enumeration_type
:
3486 if (!pdi
->is_declaration
)
3487 add_partial_enumeration (pdi
, cu
);
3489 case DW_TAG_base_type
:
3490 case DW_TAG_subrange_type
:
3491 /* File scope base type definitions are added to the partial
3493 add_partial_symbol (pdi
, cu
);
3495 case DW_TAG_namespace
:
3496 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3499 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3506 /* If the die has a sibling, skip to the sibling. */
3508 pdi
= pdi
->die_sibling
;
3512 /* Functions used to compute the fully scoped name of a partial DIE.
3514 Normally, this is simple. For C++, the parent DIE's fully scoped
3515 name is concatenated with "::" and the partial DIE's name. For
3516 Java, the same thing occurs except that "." is used instead of "::".
3517 Enumerators are an exception; they use the scope of their parent
3518 enumeration type, i.e. the name of the enumeration type is not
3519 prepended to the enumerator.
3521 There are two complexities. One is DW_AT_specification; in this
3522 case "parent" means the parent of the target of the specification,
3523 instead of the direct parent of the DIE. The other is compilers
3524 which do not emit DW_TAG_namespace; in this case we try to guess
3525 the fully qualified name of structure types from their members'
3526 linkage names. This must be done using the DIE's children rather
3527 than the children of any DW_AT_specification target. We only need
3528 to do this for structures at the top level, i.e. if the target of
3529 any DW_AT_specification (if any; otherwise the DIE itself) does not
3532 /* Compute the scope prefix associated with PDI's parent, in
3533 compilation unit CU. The result will be allocated on CU's
3534 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3535 field. NULL is returned if no prefix is necessary. */
3537 partial_die_parent_scope (struct partial_die_info
*pdi
,
3538 struct dwarf2_cu
*cu
)
3540 char *grandparent_scope
;
3541 struct partial_die_info
*parent
, *real_pdi
;
3543 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3544 then this means the parent of the specification DIE. */
3547 while (real_pdi
->has_specification
)
3548 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3550 parent
= real_pdi
->die_parent
;
3554 if (parent
->scope_set
)
3555 return parent
->scope
;
3557 fixup_partial_die (parent
, cu
);
3559 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3561 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3562 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3563 Work around this problem here. */
3564 if (cu
->language
== language_cplus
3565 && parent
->tag
== DW_TAG_namespace
3566 && strcmp (parent
->name
, "::") == 0
3567 && grandparent_scope
== NULL
)
3569 parent
->scope
= NULL
;
3570 parent
->scope_set
= 1;
3574 if (parent
->tag
== DW_TAG_namespace
3575 || parent
->tag
== DW_TAG_module
3576 || parent
->tag
== DW_TAG_structure_type
3577 || parent
->tag
== DW_TAG_class_type
3578 || parent
->tag
== DW_TAG_interface_type
3579 || parent
->tag
== DW_TAG_union_type
3580 || parent
->tag
== DW_TAG_enumeration_type
)
3582 if (grandparent_scope
== NULL
)
3583 parent
->scope
= parent
->name
;
3585 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
3586 parent
->name
, 0, cu
);
3588 else if (parent
->tag
== DW_TAG_enumerator
)
3589 /* Enumerators should not get the name of the enumeration as a prefix. */
3590 parent
->scope
= grandparent_scope
;
3593 /* FIXME drow/2004-04-01: What should we be doing with
3594 function-local names? For partial symbols, we should probably be
3596 complaint (&symfile_complaints
,
3597 _("unhandled containing DIE tag %d for DIE at %d"),
3598 parent
->tag
, pdi
->offset
);
3599 parent
->scope
= grandparent_scope
;
3602 parent
->scope_set
= 1;
3603 return parent
->scope
;
3606 /* Return the fully scoped name associated with PDI, from compilation unit
3607 CU. The result will be allocated with malloc. */
3609 partial_die_full_name (struct partial_die_info
*pdi
,
3610 struct dwarf2_cu
*cu
)
3614 /* If this is a template instantiation, we can not work out the
3615 template arguments from partial DIEs. So, unfortunately, we have
3616 to go through the full DIEs. At least any work we do building
3617 types here will be reused if full symbols are loaded later. */
3618 if (pdi
->has_template_arguments
)
3620 fixup_partial_die (pdi
, cu
);
3622 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3624 struct die_info
*die
;
3625 struct attribute attr
;
3626 struct dwarf2_cu
*ref_cu
= cu
;
3629 attr
.form
= DW_FORM_ref_addr
;
3630 attr
.u
.addr
= pdi
->offset
;
3631 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3633 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3637 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3638 if (parent_scope
== NULL
)
3641 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3645 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3647 struct objfile
*objfile
= cu
->objfile
;
3649 char *actual_name
= NULL
;
3650 const struct partial_symbol
*psym
= NULL
;
3652 int built_actual_name
= 0;
3654 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3656 actual_name
= partial_die_full_name (pdi
, cu
);
3658 built_actual_name
= 1;
3660 if (actual_name
== NULL
)
3661 actual_name
= pdi
->name
;
3665 case DW_TAG_subprogram
:
3666 if (pdi
->is_external
|| cu
->language
== language_ada
)
3668 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3669 of the global scope. But in Ada, we want to be able to access
3670 nested procedures globally. So all Ada subprograms are stored
3671 in the global scope. */
3672 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3673 mst_text, objfile); */
3674 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3676 VAR_DOMAIN
, LOC_BLOCK
,
3677 &objfile
->global_psymbols
,
3678 0, pdi
->lowpc
+ baseaddr
,
3679 cu
->language
, objfile
);
3683 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3684 mst_file_text, objfile); */
3685 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3687 VAR_DOMAIN
, LOC_BLOCK
,
3688 &objfile
->static_psymbols
,
3689 0, pdi
->lowpc
+ baseaddr
,
3690 cu
->language
, objfile
);
3693 case DW_TAG_variable
:
3695 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3699 && !dwarf2_per_objfile
->has_section_at_zero
)
3701 /* A global or static variable may also have been stripped
3702 out by the linker if unused, in which case its address
3703 will be nullified; do not add such variables into partial
3704 symbol table then. */
3706 else if (pdi
->is_external
)
3709 Don't enter into the minimal symbol tables as there is
3710 a minimal symbol table entry from the ELF symbols already.
3711 Enter into partial symbol table if it has a location
3712 descriptor or a type.
3713 If the location descriptor is missing, new_symbol will create
3714 a LOC_UNRESOLVED symbol, the address of the variable will then
3715 be determined from the minimal symbol table whenever the variable
3717 The address for the partial symbol table entry is not
3718 used by GDB, but it comes in handy for debugging partial symbol
3721 if (pdi
->locdesc
|| pdi
->has_type
)
3722 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3724 VAR_DOMAIN
, LOC_STATIC
,
3725 &objfile
->global_psymbols
,
3727 cu
->language
, objfile
);
3731 /* Static Variable. Skip symbols without location descriptors. */
3732 if (pdi
->locdesc
== NULL
)
3734 if (built_actual_name
)
3735 xfree (actual_name
);
3738 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3739 mst_file_data, objfile); */
3740 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3742 VAR_DOMAIN
, LOC_STATIC
,
3743 &objfile
->static_psymbols
,
3745 cu
->language
, objfile
);
3748 case DW_TAG_typedef
:
3749 case DW_TAG_base_type
:
3750 case DW_TAG_subrange_type
:
3751 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3753 VAR_DOMAIN
, LOC_TYPEDEF
,
3754 &objfile
->static_psymbols
,
3755 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3757 case DW_TAG_namespace
:
3758 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3760 VAR_DOMAIN
, LOC_TYPEDEF
,
3761 &objfile
->global_psymbols
,
3762 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3764 case DW_TAG_class_type
:
3765 case DW_TAG_interface_type
:
3766 case DW_TAG_structure_type
:
3767 case DW_TAG_union_type
:
3768 case DW_TAG_enumeration_type
:
3769 /* Skip external references. The DWARF standard says in the section
3770 about "Structure, Union, and Class Type Entries": "An incomplete
3771 structure, union or class type is represented by a structure,
3772 union or class entry that does not have a byte size attribute
3773 and that has a DW_AT_declaration attribute." */
3774 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3776 if (built_actual_name
)
3777 xfree (actual_name
);
3781 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3782 static vs. global. */
3783 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3785 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3786 (cu
->language
== language_cplus
3787 || cu
->language
== language_java
)
3788 ? &objfile
->global_psymbols
3789 : &objfile
->static_psymbols
,
3790 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3793 case DW_TAG_enumerator
:
3794 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3796 VAR_DOMAIN
, LOC_CONST
,
3797 (cu
->language
== language_cplus
3798 || cu
->language
== language_java
)
3799 ? &objfile
->global_psymbols
3800 : &objfile
->static_psymbols
,
3801 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3807 if (built_actual_name
)
3808 xfree (actual_name
);
3811 /* Read a partial die corresponding to a namespace; also, add a symbol
3812 corresponding to that namespace to the symbol table. NAMESPACE is
3813 the name of the enclosing namespace. */
3816 add_partial_namespace (struct partial_die_info
*pdi
,
3817 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3818 int need_pc
, struct dwarf2_cu
*cu
)
3820 /* Add a symbol for the namespace. */
3822 add_partial_symbol (pdi
, cu
);
3824 /* Now scan partial symbols in that namespace. */
3826 if (pdi
->has_children
)
3827 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3830 /* Read a partial die corresponding to a Fortran module. */
3833 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3834 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3836 /* Now scan partial symbols in that module. */
3838 if (pdi
->has_children
)
3839 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3842 /* Read a partial die corresponding to a subprogram and create a partial
3843 symbol for that subprogram. When the CU language allows it, this
3844 routine also defines a partial symbol for each nested subprogram
3845 that this subprogram contains.
3847 DIE my also be a lexical block, in which case we simply search
3848 recursively for suprograms defined inside that lexical block.
3849 Again, this is only performed when the CU language allows this
3850 type of definitions. */
3853 add_partial_subprogram (struct partial_die_info
*pdi
,
3854 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3855 int need_pc
, struct dwarf2_cu
*cu
)
3857 if (pdi
->tag
== DW_TAG_subprogram
)
3859 if (pdi
->has_pc_info
)
3861 if (pdi
->lowpc
< *lowpc
)
3862 *lowpc
= pdi
->lowpc
;
3863 if (pdi
->highpc
> *highpc
)
3864 *highpc
= pdi
->highpc
;
3868 struct objfile
*objfile
= cu
->objfile
;
3870 baseaddr
= ANOFFSET (objfile
->section_offsets
,
3871 SECT_OFF_TEXT (objfile
));
3872 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3873 pdi
->lowpc
+ baseaddr
,
3874 pdi
->highpc
- 1 + baseaddr
,
3875 cu
->per_cu
->v
.psymtab
);
3877 if (!pdi
->is_declaration
)
3878 /* Ignore subprogram DIEs that do not have a name, they are
3879 illegal. Do not emit a complaint at this point, we will
3880 do so when we convert this psymtab into a symtab. */
3882 add_partial_symbol (pdi
, cu
);
3886 if (! pdi
->has_children
)
3889 if (cu
->language
== language_ada
)
3891 pdi
= pdi
->die_child
;
3894 fixup_partial_die (pdi
, cu
);
3895 if (pdi
->tag
== DW_TAG_subprogram
3896 || pdi
->tag
== DW_TAG_lexical_block
)
3897 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3898 pdi
= pdi
->die_sibling
;
3903 /* See if we can figure out if the class lives in a namespace. We do
3904 this by looking for a member function; its demangled name will
3905 contain namespace info, if there is any. */
3908 guess_structure_name (struct partial_die_info
*struct_pdi
,
3909 struct dwarf2_cu
*cu
)
3911 if ((cu
->language
== language_cplus
3912 || cu
->language
== language_java
)
3913 && cu
->has_namespace_info
== 0
3914 && struct_pdi
->has_children
)
3916 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3917 what template types look like, because the demangler
3918 frequently doesn't give the same name as the debug info. We
3919 could fix this by only using the demangled name to get the
3920 prefix (but see comment in read_structure_type). */
3922 struct partial_die_info
*real_pdi
;
3924 /* If this DIE (this DIE's specification, if any) has a parent, then
3925 we should not do this. We'll prepend the parent's fully qualified
3926 name when we create the partial symbol. */
3928 real_pdi
= struct_pdi
;
3929 while (real_pdi
->has_specification
)
3930 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3932 if (real_pdi
->die_parent
!= NULL
)
3937 /* Read a partial die corresponding to an enumeration type. */
3940 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
3941 struct dwarf2_cu
*cu
)
3943 struct partial_die_info
*pdi
;
3945 if (enum_pdi
->name
!= NULL
)
3946 add_partial_symbol (enum_pdi
, cu
);
3948 pdi
= enum_pdi
->die_child
;
3951 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
3952 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
3954 add_partial_symbol (pdi
, cu
);
3955 pdi
= pdi
->die_sibling
;
3959 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3960 Return the corresponding abbrev, or NULL if the number is zero (indicating
3961 an empty DIE). In either case *BYTES_READ will be set to the length of
3962 the initial number. */
3964 static struct abbrev_info
*
3965 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
3966 struct dwarf2_cu
*cu
)
3968 bfd
*abfd
= cu
->objfile
->obfd
;
3969 unsigned int abbrev_number
;
3970 struct abbrev_info
*abbrev
;
3972 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
3974 if (abbrev_number
== 0)
3977 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
3980 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
3981 bfd_get_filename (abfd
));
3987 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3988 Returns a pointer to the end of a series of DIEs, terminated by an empty
3989 DIE. Any children of the skipped DIEs will also be skipped. */
3992 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
3994 struct abbrev_info
*abbrev
;
3995 unsigned int bytes_read
;
3999 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4001 return info_ptr
+ bytes_read
;
4003 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4007 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4008 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4009 abbrev corresponding to that skipped uleb128 should be passed in
4010 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4014 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4015 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4017 unsigned int bytes_read
;
4018 struct attribute attr
;
4019 bfd
*abfd
= cu
->objfile
->obfd
;
4020 unsigned int form
, i
;
4022 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4024 /* The only abbrev we care about is DW_AT_sibling. */
4025 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4027 read_attribute (&attr
, &abbrev
->attrs
[i
],
4028 abfd
, info_ptr
, cu
);
4029 if (attr
.form
== DW_FORM_ref_addr
)
4030 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
4032 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4035 /* If it isn't DW_AT_sibling, skip this attribute. */
4036 form
= abbrev
->attrs
[i
].form
;
4040 case DW_FORM_ref_addr
:
4041 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4042 and later it is offset sized. */
4043 if (cu
->header
.version
== 2)
4044 info_ptr
+= cu
->header
.addr_size
;
4046 info_ptr
+= cu
->header
.offset_size
;
4049 info_ptr
+= cu
->header
.addr_size
;
4056 case DW_FORM_flag_present
:
4071 case DW_FORM_string
:
4072 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4073 info_ptr
+= bytes_read
;
4075 case DW_FORM_sec_offset
:
4077 info_ptr
+= cu
->header
.offset_size
;
4079 case DW_FORM_exprloc
:
4081 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4082 info_ptr
+= bytes_read
;
4084 case DW_FORM_block1
:
4085 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4087 case DW_FORM_block2
:
4088 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4090 case DW_FORM_block4
:
4091 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4095 case DW_FORM_ref_udata
:
4096 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4098 case DW_FORM_indirect
:
4099 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4100 info_ptr
+= bytes_read
;
4101 /* We need to continue parsing from here, so just go back to
4103 goto skip_attribute
;
4106 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4107 dwarf_form_name (form
),
4108 bfd_get_filename (abfd
));
4112 if (abbrev
->has_children
)
4113 return skip_children (buffer
, info_ptr
, cu
);
4118 /* Locate ORIG_PDI's sibling.
4119 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4123 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4124 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4125 bfd
*abfd
, struct dwarf2_cu
*cu
)
4127 /* Do we know the sibling already? */
4129 if (orig_pdi
->sibling
)
4130 return orig_pdi
->sibling
;
4132 /* Are there any children to deal with? */
4134 if (!orig_pdi
->has_children
)
4137 /* Skip the children the long way. */
4139 return skip_children (buffer
, info_ptr
, cu
);
4142 /* Expand this partial symbol table into a full symbol table. */
4145 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4151 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
4157 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
4158 gdb_flush (gdb_stdout
);
4161 /* Restore our global data. */
4162 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4163 dwarf2_objfile_data_key
);
4165 /* If this psymtab is constructed from a debug-only objfile, the
4166 has_section_at_zero flag will not necessarily be correct. We
4167 can get the correct value for this flag by looking at the data
4168 associated with the (presumably stripped) associated objfile. */
4169 if (pst
->objfile
->separate_debug_objfile_backlink
)
4171 struct dwarf2_per_objfile
*dpo_backlink
4172 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4173 dwarf2_objfile_data_key
);
4175 dwarf2_per_objfile
->has_section_at_zero
4176 = dpo_backlink
->has_section_at_zero
;
4179 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4181 psymtab_to_symtab_1 (pst
);
4183 /* Finish up the debug error message. */
4185 printf_filtered (_("done.\n"));
4190 /* Add PER_CU to the queue. */
4193 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4195 struct dwarf2_queue_item
*item
;
4198 item
= xmalloc (sizeof (*item
));
4199 item
->per_cu
= per_cu
;
4202 if (dwarf2_queue
== NULL
)
4203 dwarf2_queue
= item
;
4205 dwarf2_queue_tail
->next
= item
;
4207 dwarf2_queue_tail
= item
;
4210 /* Process the queue. */
4213 process_queue (struct objfile
*objfile
)
4215 struct dwarf2_queue_item
*item
, *next_item
;
4217 /* The queue starts out with one item, but following a DIE reference
4218 may load a new CU, adding it to the end of the queue. */
4219 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4221 if (dwarf2_per_objfile
->using_index
4222 ? !item
->per_cu
->v
.quick
->symtab
4223 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4224 process_full_comp_unit (item
->per_cu
);
4226 item
->per_cu
->queued
= 0;
4227 next_item
= item
->next
;
4231 dwarf2_queue_tail
= NULL
;
4234 /* Free all allocated queue entries. This function only releases anything if
4235 an error was thrown; if the queue was processed then it would have been
4236 freed as we went along. */
4239 dwarf2_release_queue (void *dummy
)
4241 struct dwarf2_queue_item
*item
, *last
;
4243 item
= dwarf2_queue
;
4246 /* Anything still marked queued is likely to be in an
4247 inconsistent state, so discard it. */
4248 if (item
->per_cu
->queued
)
4250 if (item
->per_cu
->cu
!= NULL
)
4251 free_one_cached_comp_unit (item
->per_cu
->cu
);
4252 item
->per_cu
->queued
= 0;
4260 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4263 /* Read in full symbols for PST, and anything it depends on. */
4266 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4268 struct dwarf2_per_cu_data
*per_cu
;
4269 struct cleanup
*back_to
;
4272 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4273 if (!pst
->dependencies
[i
]->readin
)
4275 /* Inform about additional files that need to be read in. */
4278 /* FIXME: i18n: Need to make this a single string. */
4279 fputs_filtered (" ", gdb_stdout
);
4281 fputs_filtered ("and ", gdb_stdout
);
4283 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4284 wrap_here (""); /* Flush output */
4285 gdb_flush (gdb_stdout
);
4287 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4290 per_cu
= pst
->read_symtab_private
;
4294 /* It's an include file, no symbols to read for it.
4295 Everything is in the parent symtab. */
4300 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4303 /* Load the DIEs associated with PER_CU into memory. */
4306 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4308 bfd
*abfd
= objfile
->obfd
;
4309 struct dwarf2_cu
*cu
;
4310 unsigned int offset
;
4311 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4312 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4313 struct attribute
*attr
;
4316 gdb_assert (! per_cu
->from_debug_types
);
4318 /* Set local variables from the partial symbol table info. */
4319 offset
= per_cu
->offset
;
4321 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4322 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4323 beg_of_comp_unit
= info_ptr
;
4325 if (per_cu
->cu
== NULL
)
4327 cu
= alloc_one_comp_unit (objfile
);
4331 /* If an error occurs while loading, release our storage. */
4332 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4334 /* Read in the comp_unit header. */
4335 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4337 /* Complete the cu_header. */
4338 cu
->header
.offset
= offset
;
4339 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4341 /* Read the abbrevs for this compilation unit. */
4342 dwarf2_read_abbrevs (abfd
, cu
);
4343 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4345 /* Link this compilation unit into the compilation unit tree. */
4347 cu
->per_cu
= per_cu
;
4349 /* Link this CU into read_in_chain. */
4350 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4351 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4356 info_ptr
+= cu
->header
.first_die_offset
;
4359 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4361 /* We try not to read any attributes in this function, because not
4362 all objfiles needed for references have been loaded yet, and symbol
4363 table processing isn't initialized. But we have to set the CU language,
4364 or we won't be able to build types correctly. */
4365 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
4367 set_cu_language (DW_UNSND (attr
), cu
);
4369 set_cu_language (language_minimal
, cu
);
4371 /* Similarly, if we do not read the producer, we can not apply
4372 producer-specific interpretation. */
4373 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4375 cu
->producer
= DW_STRING (attr
);
4379 do_cleanups (free_abbrevs_cleanup
);
4381 /* We've successfully allocated this compilation unit. Let our
4382 caller clean it up when finished with it. */
4383 discard_cleanups (free_cu_cleanup
);
4387 /* Add a DIE to the delayed physname list. */
4390 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4391 const char *name
, struct die_info
*die
,
4392 struct dwarf2_cu
*cu
)
4394 struct delayed_method_info mi
;
4396 mi
.fnfield_index
= fnfield_index
;
4400 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4403 /* A cleanup for freeing the delayed method list. */
4406 free_delayed_list (void *ptr
)
4408 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4409 if (cu
->method_list
!= NULL
)
4411 VEC_free (delayed_method_info
, cu
->method_list
);
4412 cu
->method_list
= NULL
;
4416 /* Compute the physnames of any methods on the CU's method list.
4418 The computation of method physnames is delayed in order to avoid the
4419 (bad) condition that one of the method's formal parameters is of an as yet
4423 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4426 struct delayed_method_info
*mi
;
4427 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4430 struct fn_fieldlist
*fn_flp
4431 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4432 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4433 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4437 /* Generate full symbol information for PST and CU, whose DIEs have
4438 already been loaded into memory. */
4441 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4443 struct dwarf2_cu
*cu
= per_cu
->cu
;
4444 struct objfile
*objfile
= per_cu
->objfile
;
4445 CORE_ADDR lowpc
, highpc
;
4446 struct symtab
*symtab
;
4447 struct cleanup
*back_to
, *delayed_list_cleanup
;
4450 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4453 back_to
= make_cleanup (really_free_pendings
, NULL
);
4454 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4456 cu
->list_in_scope
= &file_symbols
;
4458 dwarf2_find_base_address (cu
->dies
, cu
);
4460 /* Do line number decoding in read_file_scope () */
4461 process_die (cu
->dies
, cu
);
4463 /* Now that we have processed all the DIEs in the CU, all the types
4464 should be complete, and it should now be safe to compute all of the
4466 compute_delayed_physnames (cu
);
4467 do_cleanups (delayed_list_cleanup
);
4469 /* Some compilers don't define a DW_AT_high_pc attribute for the
4470 compilation unit. If the DW_AT_high_pc is missing, synthesize
4471 it, by scanning the DIE's below the compilation unit. */
4472 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4474 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4476 /* Set symtab language to language from DW_AT_language.
4477 If the compilation is from a C file generated by language preprocessors,
4478 do not set the language if it was already deduced by start_subfile. */
4480 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4482 symtab
->language
= cu
->language
;
4485 if (dwarf2_per_objfile
->using_index
)
4486 per_cu
->v
.quick
->symtab
= symtab
;
4489 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4490 pst
->symtab
= symtab
;
4494 do_cleanups (back_to
);
4497 /* Process a die and its children. */
4500 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4504 case DW_TAG_padding
:
4506 case DW_TAG_compile_unit
:
4507 read_file_scope (die
, cu
);
4509 case DW_TAG_type_unit
:
4510 read_type_unit_scope (die
, cu
);
4512 case DW_TAG_subprogram
:
4513 case DW_TAG_inlined_subroutine
:
4514 read_func_scope (die
, cu
);
4516 case DW_TAG_lexical_block
:
4517 case DW_TAG_try_block
:
4518 case DW_TAG_catch_block
:
4519 read_lexical_block_scope (die
, cu
);
4521 case DW_TAG_class_type
:
4522 case DW_TAG_interface_type
:
4523 case DW_TAG_structure_type
:
4524 case DW_TAG_union_type
:
4525 process_structure_scope (die
, cu
);
4527 case DW_TAG_enumeration_type
:
4528 process_enumeration_scope (die
, cu
);
4531 /* These dies have a type, but processing them does not create
4532 a symbol or recurse to process the children. Therefore we can
4533 read them on-demand through read_type_die. */
4534 case DW_TAG_subroutine_type
:
4535 case DW_TAG_set_type
:
4536 case DW_TAG_array_type
:
4537 case DW_TAG_pointer_type
:
4538 case DW_TAG_ptr_to_member_type
:
4539 case DW_TAG_reference_type
:
4540 case DW_TAG_string_type
:
4543 case DW_TAG_base_type
:
4544 case DW_TAG_subrange_type
:
4545 case DW_TAG_typedef
:
4546 /* Add a typedef symbol for the type definition, if it has a
4548 new_symbol (die
, read_type_die (die
, cu
), cu
);
4550 case DW_TAG_common_block
:
4551 read_common_block (die
, cu
);
4553 case DW_TAG_common_inclusion
:
4555 case DW_TAG_namespace
:
4556 processing_has_namespace_info
= 1;
4557 read_namespace (die
, cu
);
4560 processing_has_namespace_info
= 1;
4561 read_module (die
, cu
);
4563 case DW_TAG_imported_declaration
:
4564 case DW_TAG_imported_module
:
4565 processing_has_namespace_info
= 1;
4566 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4567 || cu
->language
!= language_fortran
))
4568 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4569 dwarf_tag_name (die
->tag
));
4570 read_import_statement (die
, cu
);
4573 new_symbol (die
, NULL
, cu
);
4578 /* A helper function for dwarf2_compute_name which determines whether DIE
4579 needs to have the name of the scope prepended to the name listed in the
4583 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4585 struct attribute
*attr
;
4589 case DW_TAG_namespace
:
4590 case DW_TAG_typedef
:
4591 case DW_TAG_class_type
:
4592 case DW_TAG_interface_type
:
4593 case DW_TAG_structure_type
:
4594 case DW_TAG_union_type
:
4595 case DW_TAG_enumeration_type
:
4596 case DW_TAG_enumerator
:
4597 case DW_TAG_subprogram
:
4601 case DW_TAG_variable
:
4602 /* We only need to prefix "globally" visible variables. These include
4603 any variable marked with DW_AT_external or any variable that
4604 lives in a namespace. [Variables in anonymous namespaces
4605 require prefixing, but they are not DW_AT_external.] */
4607 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4609 struct dwarf2_cu
*spec_cu
= cu
;
4611 return die_needs_namespace (die_specification (die
, &spec_cu
),
4615 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4616 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4617 && die
->parent
->tag
!= DW_TAG_module
)
4619 /* A variable in a lexical block of some kind does not need a
4620 namespace, even though in C++ such variables may be external
4621 and have a mangled name. */
4622 if (die
->parent
->tag
== DW_TAG_lexical_block
4623 || die
->parent
->tag
== DW_TAG_try_block
4624 || die
->parent
->tag
== DW_TAG_catch_block
4625 || die
->parent
->tag
== DW_TAG_subprogram
)
4634 /* Retrieve the last character from a mem_file. */
4637 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4639 char *last_char_p
= (char *) object
;
4642 *last_char_p
= buffer
[length
- 1];
4645 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4646 compute the physname for the object, which include a method's
4647 formal parameters (C++/Java) and return type (Java).
4649 For Ada, return the DIE's linkage name rather than the fully qualified
4650 name. PHYSNAME is ignored..
4652 The result is allocated on the objfile_obstack and canonicalized. */
4655 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4659 name
= dwarf2_name (die
, cu
);
4661 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4662 compute it by typename_concat inside GDB. */
4663 if (cu
->language
== language_ada
4664 || (cu
->language
== language_fortran
&& physname
))
4666 /* For Ada unit, we prefer the linkage name over the name, as
4667 the former contains the exported name, which the user expects
4668 to be able to reference. Ideally, we want the user to be able
4669 to reference this entity using either natural or linkage name,
4670 but we haven't started looking at this enhancement yet. */
4671 struct attribute
*attr
;
4673 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4675 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4676 if (attr
&& DW_STRING (attr
))
4677 return DW_STRING (attr
);
4680 /* These are the only languages we know how to qualify names in. */
4682 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4683 || cu
->language
== language_fortran
))
4685 if (die_needs_namespace (die
, cu
))
4689 struct ui_file
*buf
;
4691 prefix
= determine_prefix (die
, cu
);
4692 buf
= mem_fileopen ();
4693 if (*prefix
!= '\0')
4695 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4698 fputs_unfiltered (prefixed_name
, buf
);
4699 xfree (prefixed_name
);
4702 fputs_unfiltered (name
? name
: "", buf
);
4704 /* Template parameters may be specified in the DIE's DW_AT_name, or
4705 as children with DW_TAG_template_type_param or
4706 DW_TAG_value_type_param. If the latter, add them to the name
4707 here. If the name already has template parameters, then
4708 skip this step; some versions of GCC emit both, and
4709 it is more efficient to use the pre-computed name.
4711 Something to keep in mind about this process: it is very
4712 unlikely, or in some cases downright impossible, to produce
4713 something that will match the mangled name of a function.
4714 If the definition of the function has the same debug info,
4715 we should be able to match up with it anyway. But fallbacks
4716 using the minimal symbol, for instance to find a method
4717 implemented in a stripped copy of libstdc++, will not work.
4718 If we do not have debug info for the definition, we will have to
4719 match them up some other way.
4721 When we do name matching there is a related problem with function
4722 templates; two instantiated function templates are allowed to
4723 differ only by their return types, which we do not add here. */
4725 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4727 struct attribute
*attr
;
4728 struct die_info
*child
;
4731 die
->building_fullname
= 1;
4733 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4738 struct dwarf2_locexpr_baton
*baton
;
4741 if (child
->tag
!= DW_TAG_template_type_param
4742 && child
->tag
!= DW_TAG_template_value_param
)
4747 fputs_unfiltered ("<", buf
);
4751 fputs_unfiltered (", ", buf
);
4753 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4756 complaint (&symfile_complaints
,
4757 _("template parameter missing DW_AT_type"));
4758 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4761 type
= die_type (child
, cu
);
4763 if (child
->tag
== DW_TAG_template_type_param
)
4765 c_print_type (type
, "", buf
, -1, 0);
4769 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4772 complaint (&symfile_complaints
,
4773 _("template parameter missing DW_AT_const_value"));
4774 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4778 dwarf2_const_value_attr (attr
, type
, name
,
4779 &cu
->comp_unit_obstack
, cu
,
4780 &value
, &bytes
, &baton
);
4782 if (TYPE_NOSIGN (type
))
4783 /* GDB prints characters as NUMBER 'CHAR'. If that's
4784 changed, this can use value_print instead. */
4785 c_printchar (value
, type
, buf
);
4788 struct value_print_options opts
;
4791 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4795 else if (bytes
!= NULL
)
4797 v
= allocate_value (type
);
4798 memcpy (value_contents_writeable (v
), bytes
,
4799 TYPE_LENGTH (type
));
4802 v
= value_from_longest (type
, value
);
4804 /* Specify decimal so that we do not depend on the radix. */
4805 get_formatted_print_options (&opts
, 'd');
4807 value_print (v
, buf
, &opts
);
4813 die
->building_fullname
= 0;
4817 /* Close the argument list, with a space if necessary
4818 (nested templates). */
4819 char last_char
= '\0';
4820 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4821 if (last_char
== '>')
4822 fputs_unfiltered (" >", buf
);
4824 fputs_unfiltered (">", buf
);
4828 /* For Java and C++ methods, append formal parameter type
4829 information, if PHYSNAME. */
4831 if (physname
&& die
->tag
== DW_TAG_subprogram
4832 && (cu
->language
== language_cplus
4833 || cu
->language
== language_java
))
4835 struct type
*type
= read_type_die (die
, cu
);
4837 c_type_print_args (type
, buf
, 0, cu
->language
);
4839 if (cu
->language
== language_java
)
4841 /* For java, we must append the return type to method
4843 if (die
->tag
== DW_TAG_subprogram
)
4844 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4847 else if (cu
->language
== language_cplus
)
4849 /* Assume that an artificial first parameter is
4850 "this", but do not crash if it is not. RealView
4851 marks unnamed (and thus unused) parameters as
4852 artificial; there is no way to differentiate
4854 if (TYPE_NFIELDS (type
) > 0
4855 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4856 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
4857 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
4858 fputs_unfiltered (" const", buf
);
4862 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4864 ui_file_delete (buf
);
4866 if (cu
->language
== language_cplus
)
4869 = dwarf2_canonicalize_name (name
, cu
,
4870 &cu
->objfile
->objfile_obstack
);
4881 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4882 If scope qualifiers are appropriate they will be added. The result
4883 will be allocated on the objfile_obstack, or NULL if the DIE does
4884 not have a name. NAME may either be from a previous call to
4885 dwarf2_name or NULL.
4887 The output string will be canonicalized (if C++/Java). */
4890 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4892 return dwarf2_compute_name (name
, die
, cu
, 0);
4895 /* Construct a physname for the given DIE in CU. NAME may either be
4896 from a previous call to dwarf2_name or NULL. The result will be
4897 allocated on the objfile_objstack or NULL if the DIE does not have a
4900 The output string will be canonicalized (if C++/Java). */
4903 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4905 return dwarf2_compute_name (name
, die
, cu
, 1);
4908 /* Read the import statement specified by the given die and record it. */
4911 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
4913 struct attribute
*import_attr
;
4914 struct die_info
*imported_die
;
4915 struct dwarf2_cu
*imported_cu
;
4916 const char *imported_name
;
4917 const char *imported_name_prefix
;
4918 const char *canonical_name
;
4919 const char *import_alias
;
4920 const char *imported_declaration
= NULL
;
4921 const char *import_prefix
;
4925 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
4926 if (import_attr
== NULL
)
4928 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
4929 dwarf_tag_name (die
->tag
));
4934 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
4935 imported_name
= dwarf2_name (imported_die
, imported_cu
);
4936 if (imported_name
== NULL
)
4938 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4940 The import in the following code:
4954 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4955 <52> DW_AT_decl_file : 1
4956 <53> DW_AT_decl_line : 6
4957 <54> DW_AT_import : <0x75>
4958 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4960 <5b> DW_AT_decl_file : 1
4961 <5c> DW_AT_decl_line : 2
4962 <5d> DW_AT_type : <0x6e>
4964 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4965 <76> DW_AT_byte_size : 4
4966 <77> DW_AT_encoding : 5 (signed)
4968 imports the wrong die ( 0x75 instead of 0x58 ).
4969 This case will be ignored until the gcc bug is fixed. */
4973 /* Figure out the local name after import. */
4974 import_alias
= dwarf2_name (die
, cu
);
4976 /* Figure out where the statement is being imported to. */
4977 import_prefix
= determine_prefix (die
, cu
);
4979 /* Figure out what the scope of the imported die is and prepend it
4980 to the name of the imported die. */
4981 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
4983 if (imported_die
->tag
!= DW_TAG_namespace
4984 && imported_die
->tag
!= DW_TAG_module
)
4986 imported_declaration
= imported_name
;
4987 canonical_name
= imported_name_prefix
;
4989 else if (strlen (imported_name_prefix
) > 0)
4991 temp
= alloca (strlen (imported_name_prefix
)
4992 + 2 + strlen (imported_name
) + 1);
4993 strcpy (temp
, imported_name_prefix
);
4994 strcat (temp
, "::");
4995 strcat (temp
, imported_name
);
4996 canonical_name
= temp
;
4999 canonical_name
= imported_name
;
5001 cp_add_using_directive (import_prefix
,
5004 imported_declaration
,
5005 &cu
->objfile
->objfile_obstack
);
5009 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5011 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5015 free_cu_line_header (void *arg
)
5017 struct dwarf2_cu
*cu
= arg
;
5019 free_line_header (cu
->line_header
);
5020 cu
->line_header
= NULL
;
5024 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5025 char **name
, char **comp_dir
)
5027 struct attribute
*attr
;
5032 /* Find the filename. Do not use dwarf2_name here, since the filename
5033 is not a source language identifier. */
5034 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5037 *name
= DW_STRING (attr
);
5040 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5042 *comp_dir
= DW_STRING (attr
);
5043 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5045 *comp_dir
= ldirname (*name
);
5046 if (*comp_dir
!= NULL
)
5047 make_cleanup (xfree
, *comp_dir
);
5049 if (*comp_dir
!= NULL
)
5051 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5052 directory, get rid of it. */
5053 char *cp
= strchr (*comp_dir
, ':');
5055 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5060 *name
= "<unknown>";
5064 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5066 struct objfile
*objfile
= cu
->objfile
;
5067 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5068 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5069 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5070 struct attribute
*attr
;
5072 char *comp_dir
= NULL
;
5073 struct die_info
*child_die
;
5074 bfd
*abfd
= objfile
->obfd
;
5075 struct line_header
*line_header
= 0;
5078 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5080 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5082 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5083 from finish_block. */
5084 if (lowpc
== ((CORE_ADDR
) -1))
5089 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5091 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5094 set_cu_language (DW_UNSND (attr
), cu
);
5097 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5099 cu
->producer
= DW_STRING (attr
);
5101 /* We assume that we're processing GCC output. */
5102 processing_gcc_compilation
= 2;
5104 processing_has_namespace_info
= 0;
5106 start_symtab (name
, comp_dir
, lowpc
);
5107 record_debugformat ("DWARF 2");
5108 record_producer (cu
->producer
);
5110 initialize_cu_func_list (cu
);
5112 /* Decode line number information if present. We do this before
5113 processing child DIEs, so that the line header table is available
5114 for DW_AT_decl_file. */
5115 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5118 unsigned int line_offset
= DW_UNSND (attr
);
5119 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5122 cu
->line_header
= line_header
;
5123 make_cleanup (free_cu_line_header
, cu
);
5124 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5128 /* Process all dies in compilation unit. */
5129 if (die
->child
!= NULL
)
5131 child_die
= die
->child
;
5132 while (child_die
&& child_die
->tag
)
5134 process_die (child_die
, cu
);
5135 child_die
= sibling_die (child_die
);
5139 /* Decode macro information, if present. Dwarf 2 macro information
5140 refers to information in the line number info statement program
5141 header, so we can only read it if we've read the header
5143 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5144 if (attr
&& line_header
)
5146 unsigned int macro_offset
= DW_UNSND (attr
);
5148 dwarf_decode_macros (line_header
, macro_offset
,
5149 comp_dir
, abfd
, cu
);
5151 do_cleanups (back_to
);
5154 /* For TUs we want to skip the first top level sibling if it's not the
5155 actual type being defined by this TU. In this case the first top
5156 level sibling is there to provide context only. */
5159 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5161 struct objfile
*objfile
= cu
->objfile
;
5162 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5164 struct attribute
*attr
;
5166 char *comp_dir
= NULL
;
5167 struct die_info
*child_die
;
5168 bfd
*abfd
= objfile
->obfd
;
5170 /* start_symtab needs a low pc, but we don't really have one.
5171 Do what read_file_scope would do in the absence of such info. */
5172 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5174 /* Find the filename. Do not use dwarf2_name here, since the filename
5175 is not a source language identifier. */
5176 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5178 name
= DW_STRING (attr
);
5180 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5182 comp_dir
= DW_STRING (attr
);
5183 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5185 comp_dir
= ldirname (name
);
5186 if (comp_dir
!= NULL
)
5187 make_cleanup (xfree
, comp_dir
);
5193 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5195 set_cu_language (DW_UNSND (attr
), cu
);
5197 /* This isn't technically needed today. It is done for symmetry
5198 with read_file_scope. */
5199 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5201 cu
->producer
= DW_STRING (attr
);
5203 /* We assume that we're processing GCC output. */
5204 processing_gcc_compilation
= 2;
5206 processing_has_namespace_info
= 0;
5208 start_symtab (name
, comp_dir
, lowpc
);
5209 record_debugformat ("DWARF 2");
5210 record_producer (cu
->producer
);
5212 /* Process the dies in the type unit. */
5213 if (die
->child
== NULL
)
5215 dump_die_for_error (die
);
5216 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5217 bfd_get_filename (abfd
));
5220 child_die
= die
->child
;
5222 while (child_die
&& child_die
->tag
)
5224 process_die (child_die
, cu
);
5226 child_die
= sibling_die (child_die
);
5229 do_cleanups (back_to
);
5233 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5234 struct dwarf2_cu
*cu
)
5236 struct function_range
*thisfn
;
5238 thisfn
= (struct function_range
*)
5239 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5240 thisfn
->name
= name
;
5241 thisfn
->lowpc
= lowpc
;
5242 thisfn
->highpc
= highpc
;
5243 thisfn
->seen_line
= 0;
5244 thisfn
->next
= NULL
;
5246 if (cu
->last_fn
== NULL
)
5247 cu
->first_fn
= thisfn
;
5249 cu
->last_fn
->next
= thisfn
;
5251 cu
->last_fn
= thisfn
;
5254 /* qsort helper for inherit_abstract_dies. */
5257 unsigned_int_compar (const void *ap
, const void *bp
)
5259 unsigned int a
= *(unsigned int *) ap
;
5260 unsigned int b
= *(unsigned int *) bp
;
5262 return (a
> b
) - (b
> a
);
5265 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5266 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5267 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5270 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5272 struct die_info
*child_die
;
5273 unsigned die_children_count
;
5274 /* CU offsets which were referenced by children of the current DIE. */
5276 unsigned *offsets_end
, *offsetp
;
5277 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5278 struct die_info
*origin_die
;
5279 /* Iterator of the ORIGIN_DIE children. */
5280 struct die_info
*origin_child_die
;
5281 struct cleanup
*cleanups
;
5282 struct attribute
*attr
;
5283 struct dwarf2_cu
*origin_cu
;
5284 struct pending
**origin_previous_list_in_scope
;
5286 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5290 /* Note that following die references may follow to a die in a
5294 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5296 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5298 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5299 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5301 if (die
->tag
!= origin_die
->tag
5302 && !(die
->tag
== DW_TAG_inlined_subroutine
5303 && origin_die
->tag
== DW_TAG_subprogram
))
5304 complaint (&symfile_complaints
,
5305 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5306 die
->offset
, origin_die
->offset
);
5308 child_die
= die
->child
;
5309 die_children_count
= 0;
5310 while (child_die
&& child_die
->tag
)
5312 child_die
= sibling_die (child_die
);
5313 die_children_count
++;
5315 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5316 cleanups
= make_cleanup (xfree
, offsets
);
5318 offsets_end
= offsets
;
5319 child_die
= die
->child
;
5320 while (child_die
&& child_die
->tag
)
5322 /* For each CHILD_DIE, find the corresponding child of
5323 ORIGIN_DIE. If there is more than one layer of
5324 DW_AT_abstract_origin, follow them all; there shouldn't be,
5325 but GCC versions at least through 4.4 generate this (GCC PR
5327 struct die_info
*child_origin_die
= child_die
;
5328 struct dwarf2_cu
*child_origin_cu
= cu
;
5332 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5336 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5340 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5341 counterpart may exist. */
5342 if (child_origin_die
!= child_die
)
5344 if (child_die
->tag
!= child_origin_die
->tag
5345 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5346 && child_origin_die
->tag
== DW_TAG_subprogram
))
5347 complaint (&symfile_complaints
,
5348 _("Child DIE 0x%x and its abstract origin 0x%x have "
5349 "different tags"), child_die
->offset
,
5350 child_origin_die
->offset
);
5351 if (child_origin_die
->parent
!= origin_die
)
5352 complaint (&symfile_complaints
,
5353 _("Child DIE 0x%x and its abstract origin 0x%x have "
5354 "different parents"), child_die
->offset
,
5355 child_origin_die
->offset
);
5357 *offsets_end
++ = child_origin_die
->offset
;
5359 child_die
= sibling_die (child_die
);
5361 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5362 unsigned_int_compar
);
5363 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5364 if (offsetp
[-1] == *offsetp
)
5365 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
5366 "to DIE 0x%x as their abstract origin"),
5367 die
->offset
, *offsetp
);
5370 origin_child_die
= origin_die
->child
;
5371 while (origin_child_die
&& origin_child_die
->tag
)
5373 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5374 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5376 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5378 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5379 process_die (origin_child_die
, origin_cu
);
5381 origin_child_die
= sibling_die (origin_child_die
);
5383 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5385 do_cleanups (cleanups
);
5389 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5391 struct objfile
*objfile
= cu
->objfile
;
5392 struct context_stack
*new;
5395 struct die_info
*child_die
;
5396 struct attribute
*attr
, *call_line
, *call_file
;
5399 struct block
*block
;
5400 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5401 VEC (symbolp
) *template_args
= NULL
;
5402 struct template_symbol
*templ_func
= NULL
;
5406 /* If we do not have call site information, we can't show the
5407 caller of this inlined function. That's too confusing, so
5408 only use the scope for local variables. */
5409 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5410 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5411 if (call_line
== NULL
|| call_file
== NULL
)
5413 read_lexical_block_scope (die
, cu
);
5418 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5420 name
= dwarf2_name (die
, cu
);
5422 /* Ignore functions with missing or empty names. These are actually
5423 illegal according to the DWARF standard. */
5426 complaint (&symfile_complaints
,
5427 _("missing name for subprogram DIE at %d"), die
->offset
);
5431 /* Ignore functions with missing or invalid low and high pc attributes. */
5432 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5434 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5435 if (!attr
|| !DW_UNSND (attr
))
5436 complaint (&symfile_complaints
,
5437 _("cannot get low and high bounds for subprogram DIE at %d"),
5445 /* Record the function range for dwarf_decode_lines. */
5446 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5448 /* If we have any template arguments, then we must allocate a
5449 different sort of symbol. */
5450 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5452 if (child_die
->tag
== DW_TAG_template_type_param
5453 || child_die
->tag
== DW_TAG_template_value_param
)
5455 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5456 struct template_symbol
);
5457 templ_func
->base
.is_cplus_template_function
= 1;
5462 new = push_context (0, lowpc
);
5463 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5464 (struct symbol
*) templ_func
);
5466 /* If there is a location expression for DW_AT_frame_base, record
5468 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5470 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5471 expression is being recorded directly in the function's symbol
5472 and not in a separate frame-base object. I guess this hack is
5473 to avoid adding some sort of frame-base adjunct/annex to the
5474 function's symbol :-(. The problem with doing this is that it
5475 results in a function symbol with a location expression that
5476 has nothing to do with the location of the function, ouch! The
5477 relationship should be: a function's symbol has-a frame base; a
5478 frame-base has-a location expression. */
5479 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5481 cu
->list_in_scope
= &local_symbols
;
5483 if (die
->child
!= NULL
)
5485 child_die
= die
->child
;
5486 while (child_die
&& child_die
->tag
)
5488 if (child_die
->tag
== DW_TAG_template_type_param
5489 || child_die
->tag
== DW_TAG_template_value_param
)
5491 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5494 VEC_safe_push (symbolp
, template_args
, arg
);
5497 process_die (child_die
, cu
);
5498 child_die
= sibling_die (child_die
);
5502 inherit_abstract_dies (die
, cu
);
5504 /* If we have a DW_AT_specification, we might need to import using
5505 directives from the context of the specification DIE. See the
5506 comment in determine_prefix. */
5507 if (cu
->language
== language_cplus
5508 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5510 struct dwarf2_cu
*spec_cu
= cu
;
5511 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5515 child_die
= spec_die
->child
;
5516 while (child_die
&& child_die
->tag
)
5518 if (child_die
->tag
== DW_TAG_imported_module
)
5519 process_die (child_die
, spec_cu
);
5520 child_die
= sibling_die (child_die
);
5523 /* In some cases, GCC generates specification DIEs that
5524 themselves contain DW_AT_specification attributes. */
5525 spec_die
= die_specification (spec_die
, &spec_cu
);
5529 new = pop_context ();
5530 /* Make a block for the local symbols within. */
5531 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5532 lowpc
, highpc
, objfile
);
5534 /* For C++, set the block's scope. */
5535 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5536 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5537 determine_prefix (die
, cu
),
5538 processing_has_namespace_info
);
5540 /* If we have address ranges, record them. */
5541 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5543 /* Attach template arguments to function. */
5544 if (! VEC_empty (symbolp
, template_args
))
5546 gdb_assert (templ_func
!= NULL
);
5548 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5549 templ_func
->template_arguments
5550 = obstack_alloc (&objfile
->objfile_obstack
,
5551 (templ_func
->n_template_arguments
5552 * sizeof (struct symbol
*)));
5553 memcpy (templ_func
->template_arguments
,
5554 VEC_address (symbolp
, template_args
),
5555 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5556 VEC_free (symbolp
, template_args
);
5559 /* In C++, we can have functions nested inside functions (e.g., when
5560 a function declares a class that has methods). This means that
5561 when we finish processing a function scope, we may need to go
5562 back to building a containing block's symbol lists. */
5563 local_symbols
= new->locals
;
5564 param_symbols
= new->params
;
5565 using_directives
= new->using_directives
;
5567 /* If we've finished processing a top-level function, subsequent
5568 symbols go in the file symbol list. */
5569 if (outermost_context_p ())
5570 cu
->list_in_scope
= &file_symbols
;
5573 /* Process all the DIES contained within a lexical block scope. Start
5574 a new scope, process the dies, and then close the scope. */
5577 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5579 struct objfile
*objfile
= cu
->objfile
;
5580 struct context_stack
*new;
5581 CORE_ADDR lowpc
, highpc
;
5582 struct die_info
*child_die
;
5585 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5587 /* Ignore blocks with missing or invalid low and high pc attributes. */
5588 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5589 as multiple lexical blocks? Handling children in a sane way would
5590 be nasty. Might be easier to properly extend generic blocks to
5592 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5597 push_context (0, lowpc
);
5598 if (die
->child
!= NULL
)
5600 child_die
= die
->child
;
5601 while (child_die
&& child_die
->tag
)
5603 process_die (child_die
, cu
);
5604 child_die
= sibling_die (child_die
);
5607 new = pop_context ();
5609 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5612 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5615 /* Note that recording ranges after traversing children, as we
5616 do here, means that recording a parent's ranges entails
5617 walking across all its children's ranges as they appear in
5618 the address map, which is quadratic behavior.
5620 It would be nicer to record the parent's ranges before
5621 traversing its children, simply overriding whatever you find
5622 there. But since we don't even decide whether to create a
5623 block until after we've traversed its children, that's hard
5625 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5627 local_symbols
= new->locals
;
5628 using_directives
= new->using_directives
;
5631 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5632 Return 1 if the attributes are present and valid, otherwise, return 0.
5633 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5636 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5637 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5638 struct partial_symtab
*ranges_pst
)
5640 struct objfile
*objfile
= cu
->objfile
;
5641 struct comp_unit_head
*cu_header
= &cu
->header
;
5642 bfd
*obfd
= objfile
->obfd
;
5643 unsigned int addr_size
= cu_header
->addr_size
;
5644 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5645 /* Base address selection entry. */
5656 found_base
= cu
->base_known
;
5657 base
= cu
->base_address
;
5659 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5660 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5662 complaint (&symfile_complaints
,
5663 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5667 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5669 /* Read in the largest possible address. */
5670 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5671 if ((marker
& mask
) == mask
)
5673 /* If we found the largest possible address, then
5674 read the base address. */
5675 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5676 buffer
+= 2 * addr_size
;
5677 offset
+= 2 * addr_size
;
5683 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5687 CORE_ADDR range_beginning
, range_end
;
5689 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5690 buffer
+= addr_size
;
5691 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5692 buffer
+= addr_size
;
5693 offset
+= 2 * addr_size
;
5695 /* An end of list marker is a pair of zero addresses. */
5696 if (range_beginning
== 0 && range_end
== 0)
5697 /* Found the end of list entry. */
5700 /* Each base address selection entry is a pair of 2 values.
5701 The first is the largest possible address, the second is
5702 the base address. Check for a base address here. */
5703 if ((range_beginning
& mask
) == mask
)
5705 /* If we found the largest possible address, then
5706 read the base address. */
5707 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5714 /* We have no valid base address for the ranges
5716 complaint (&symfile_complaints
,
5717 _("Invalid .debug_ranges data (no base address)"));
5721 range_beginning
+= base
;
5724 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5725 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5726 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
5729 /* FIXME: This is recording everything as a low-high
5730 segment of consecutive addresses. We should have a
5731 data structure for discontiguous block ranges
5735 low
= range_beginning
;
5741 if (range_beginning
< low
)
5742 low
= range_beginning
;
5743 if (range_end
> high
)
5749 /* If the first entry is an end-of-list marker, the range
5750 describes an empty scope, i.e. no instructions. */
5756 *high_return
= high
;
5760 /* Get low and high pc attributes from a die. Return 1 if the attributes
5761 are present and valid, otherwise, return 0. Return -1 if the range is
5762 discontinuous, i.e. derived from DW_AT_ranges information. */
5764 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5765 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5766 struct partial_symtab
*pst
)
5768 struct attribute
*attr
;
5773 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5776 high
= DW_ADDR (attr
);
5777 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5779 low
= DW_ADDR (attr
);
5781 /* Found high w/o low attribute. */
5784 /* Found consecutive range of addresses. */
5789 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5792 /* Value of the DW_AT_ranges attribute is the offset in the
5793 .debug_ranges section. */
5794 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5796 /* Found discontinuous range of addresses. */
5804 /* When using the GNU linker, .gnu.linkonce. sections are used to
5805 eliminate duplicate copies of functions and vtables and such.
5806 The linker will arbitrarily choose one and discard the others.
5807 The AT_*_pc values for such functions refer to local labels in
5808 these sections. If the section from that file was discarded, the
5809 labels are not in the output, so the relocs get a value of 0.
5810 If this is a discarded function, mark the pc bounds as invalid,
5811 so that GDB will ignore it. */
5812 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5820 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5821 its low and high PC addresses. Do nothing if these addresses could not
5822 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5823 and HIGHPC to the high address if greater than HIGHPC. */
5826 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5827 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5828 struct dwarf2_cu
*cu
)
5830 CORE_ADDR low
, high
;
5831 struct die_info
*child
= die
->child
;
5833 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5835 *lowpc
= min (*lowpc
, low
);
5836 *highpc
= max (*highpc
, high
);
5839 /* If the language does not allow nested subprograms (either inside
5840 subprograms or lexical blocks), we're done. */
5841 if (cu
->language
!= language_ada
)
5844 /* Check all the children of the given DIE. If it contains nested
5845 subprograms, then check their pc bounds. Likewise, we need to
5846 check lexical blocks as well, as they may also contain subprogram
5848 while (child
&& child
->tag
)
5850 if (child
->tag
== DW_TAG_subprogram
5851 || child
->tag
== DW_TAG_lexical_block
)
5852 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5853 child
= sibling_die (child
);
5857 /* Get the low and high pc's represented by the scope DIE, and store
5858 them in *LOWPC and *HIGHPC. If the correct values can't be
5859 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5862 get_scope_pc_bounds (struct die_info
*die
,
5863 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5864 struct dwarf2_cu
*cu
)
5866 CORE_ADDR best_low
= (CORE_ADDR
) -1;
5867 CORE_ADDR best_high
= (CORE_ADDR
) 0;
5868 CORE_ADDR current_low
, current_high
;
5870 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
5872 best_low
= current_low
;
5873 best_high
= current_high
;
5877 struct die_info
*child
= die
->child
;
5879 while (child
&& child
->tag
)
5881 switch (child
->tag
) {
5882 case DW_TAG_subprogram
:
5883 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
5885 case DW_TAG_namespace
:
5887 /* FIXME: carlton/2004-01-16: Should we do this for
5888 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5889 that current GCC's always emit the DIEs corresponding
5890 to definitions of methods of classes as children of a
5891 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5892 the DIEs giving the declarations, which could be
5893 anywhere). But I don't see any reason why the
5894 standards says that they have to be there. */
5895 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
5897 if (current_low
!= ((CORE_ADDR
) -1))
5899 best_low
= min (best_low
, current_low
);
5900 best_high
= max (best_high
, current_high
);
5908 child
= sibling_die (child
);
5913 *highpc
= best_high
;
5916 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5919 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
5920 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
5922 struct attribute
*attr
;
5924 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5927 CORE_ADDR high
= DW_ADDR (attr
);
5929 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5932 CORE_ADDR low
= DW_ADDR (attr
);
5934 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
5938 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5941 bfd
*obfd
= cu
->objfile
->obfd
;
5943 /* The value of the DW_AT_ranges attribute is the offset of the
5944 address range list in the .debug_ranges section. */
5945 unsigned long offset
= DW_UNSND (attr
);
5946 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5948 /* For some target architectures, but not others, the
5949 read_address function sign-extends the addresses it returns.
5950 To recognize base address selection entries, we need a
5952 unsigned int addr_size
= cu
->header
.addr_size
;
5953 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5955 /* The base address, to which the next pair is relative. Note
5956 that this 'base' is a DWARF concept: most entries in a range
5957 list are relative, to reduce the number of relocs against the
5958 debugging information. This is separate from this function's
5959 'baseaddr' argument, which GDB uses to relocate debugging
5960 information from a shared library based on the address at
5961 which the library was loaded. */
5962 CORE_ADDR base
= cu
->base_address
;
5963 int base_known
= cu
->base_known
;
5965 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
5966 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5968 complaint (&symfile_complaints
,
5969 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5976 unsigned int bytes_read
;
5977 CORE_ADDR start
, end
;
5979 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5980 buffer
+= bytes_read
;
5981 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5982 buffer
+= bytes_read
;
5984 /* Did we find the end of the range list? */
5985 if (start
== 0 && end
== 0)
5988 /* Did we find a base address selection entry? */
5989 else if ((start
& base_select_mask
) == base_select_mask
)
5995 /* We found an ordinary address range. */
6000 complaint (&symfile_complaints
,
6001 _("Invalid .debug_ranges data (no base address)"));
6005 record_block_range (block
,
6006 baseaddr
+ base
+ start
,
6007 baseaddr
+ base
+ end
- 1);
6013 /* Add an aggregate field to the field list. */
6016 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6017 struct dwarf2_cu
*cu
)
6019 struct objfile
*objfile
= cu
->objfile
;
6020 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6021 struct nextfield
*new_field
;
6022 struct attribute
*attr
;
6024 char *fieldname
= "";
6026 /* Allocate a new field list entry and link it in. */
6027 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6028 make_cleanup (xfree
, new_field
);
6029 memset (new_field
, 0, sizeof (struct nextfield
));
6031 if (die
->tag
== DW_TAG_inheritance
)
6033 new_field
->next
= fip
->baseclasses
;
6034 fip
->baseclasses
= new_field
;
6038 new_field
->next
= fip
->fields
;
6039 fip
->fields
= new_field
;
6043 /* Handle accessibility and virtuality of field.
6044 The default accessibility for members is public, the default
6045 accessibility for inheritance is private. */
6046 if (die
->tag
!= DW_TAG_inheritance
)
6047 new_field
->accessibility
= DW_ACCESS_public
;
6049 new_field
->accessibility
= DW_ACCESS_private
;
6050 new_field
->virtuality
= DW_VIRTUALITY_none
;
6052 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6054 new_field
->accessibility
= DW_UNSND (attr
);
6055 if (new_field
->accessibility
!= DW_ACCESS_public
)
6056 fip
->non_public_fields
= 1;
6057 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6059 new_field
->virtuality
= DW_UNSND (attr
);
6061 fp
= &new_field
->field
;
6063 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6065 /* Data member other than a C++ static data member. */
6067 /* Get type of field. */
6068 fp
->type
= die_type (die
, cu
);
6070 SET_FIELD_BITPOS (*fp
, 0);
6072 /* Get bit size of field (zero if none). */
6073 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6076 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6080 FIELD_BITSIZE (*fp
) = 0;
6083 /* Get bit offset of field. */
6084 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6087 int byte_offset
= 0;
6089 if (attr_form_is_section_offset (attr
))
6090 dwarf2_complex_location_expr_complaint ();
6091 else if (attr_form_is_constant (attr
))
6092 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6093 else if (attr_form_is_block (attr
))
6094 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6096 dwarf2_complex_location_expr_complaint ();
6098 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6100 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6103 if (gdbarch_bits_big_endian (gdbarch
))
6105 /* For big endian bits, the DW_AT_bit_offset gives the
6106 additional bit offset from the MSB of the containing
6107 anonymous object to the MSB of the field. We don't
6108 have to do anything special since we don't need to
6109 know the size of the anonymous object. */
6110 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6114 /* For little endian bits, compute the bit offset to the
6115 MSB of the anonymous object, subtract off the number of
6116 bits from the MSB of the field to the MSB of the
6117 object, and then subtract off the number of bits of
6118 the field itself. The result is the bit offset of
6119 the LSB of the field. */
6121 int bit_offset
= DW_UNSND (attr
);
6123 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6126 /* The size of the anonymous object containing
6127 the bit field is explicit, so use the
6128 indicated size (in bytes). */
6129 anonymous_size
= DW_UNSND (attr
);
6133 /* The size of the anonymous object containing
6134 the bit field must be inferred from the type
6135 attribute of the data member containing the
6137 anonymous_size
= TYPE_LENGTH (fp
->type
);
6139 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6140 - bit_offset
- FIELD_BITSIZE (*fp
);
6144 /* Get name of field. */
6145 fieldname
= dwarf2_name (die
, cu
);
6146 if (fieldname
== NULL
)
6149 /* The name is already allocated along with this objfile, so we don't
6150 need to duplicate it for the type. */
6151 fp
->name
= fieldname
;
6153 /* Change accessibility for artificial fields (e.g. virtual table
6154 pointer or virtual base class pointer) to private. */
6155 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6157 FIELD_ARTIFICIAL (*fp
) = 1;
6158 new_field
->accessibility
= DW_ACCESS_private
;
6159 fip
->non_public_fields
= 1;
6162 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6164 /* C++ static member. */
6166 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6167 is a declaration, but all versions of G++ as of this writing
6168 (so through at least 3.2.1) incorrectly generate
6169 DW_TAG_variable tags. */
6173 /* Get name of field. */
6174 fieldname
= dwarf2_name (die
, cu
);
6175 if (fieldname
== NULL
)
6178 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6180 /* Only create a symbol if this is an external value.
6181 new_symbol checks this and puts the value in the global symbol
6182 table, which we want. If it is not external, new_symbol
6183 will try to put the value in cu->list_in_scope which is wrong. */
6184 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6186 /* A static const member, not much different than an enum as far as
6187 we're concerned, except that we can support more types. */
6188 new_symbol (die
, NULL
, cu
);
6191 /* Get physical name. */
6192 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6194 /* The name is already allocated along with this objfile, so we don't
6195 need to duplicate it for the type. */
6196 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6197 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6198 FIELD_NAME (*fp
) = fieldname
;
6200 else if (die
->tag
== DW_TAG_inheritance
)
6202 /* C++ base class field. */
6203 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6206 int byte_offset
= 0;
6208 if (attr_form_is_section_offset (attr
))
6209 dwarf2_complex_location_expr_complaint ();
6210 else if (attr_form_is_constant (attr
))
6211 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6212 else if (attr_form_is_block (attr
))
6213 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6215 dwarf2_complex_location_expr_complaint ();
6217 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6219 FIELD_BITSIZE (*fp
) = 0;
6220 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6221 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6222 fip
->nbaseclasses
++;
6226 /* Add a typedef defined in the scope of the FIP's class. */
6229 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6230 struct dwarf2_cu
*cu
)
6232 struct objfile
*objfile
= cu
->objfile
;
6233 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6234 struct typedef_field_list
*new_field
;
6235 struct attribute
*attr
;
6236 struct typedef_field
*fp
;
6237 char *fieldname
= "";
6239 /* Allocate a new field list entry and link it in. */
6240 new_field
= xzalloc (sizeof (*new_field
));
6241 make_cleanup (xfree
, new_field
);
6243 gdb_assert (die
->tag
== DW_TAG_typedef
);
6245 fp
= &new_field
->field
;
6247 /* Get name of field. */
6248 fp
->name
= dwarf2_name (die
, cu
);
6249 if (fp
->name
== NULL
)
6252 fp
->type
= read_type_die (die
, cu
);
6254 new_field
->next
= fip
->typedef_field_list
;
6255 fip
->typedef_field_list
= new_field
;
6256 fip
->typedef_field_list_count
++;
6259 /* Create the vector of fields, and attach it to the type. */
6262 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6263 struct dwarf2_cu
*cu
)
6265 int nfields
= fip
->nfields
;
6267 /* Record the field count, allocate space for the array of fields,
6268 and create blank accessibility bitfields if necessary. */
6269 TYPE_NFIELDS (type
) = nfields
;
6270 TYPE_FIELDS (type
) = (struct field
*)
6271 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6272 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6274 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6276 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6278 TYPE_FIELD_PRIVATE_BITS (type
) =
6279 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6280 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6282 TYPE_FIELD_PROTECTED_BITS (type
) =
6283 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6284 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6286 TYPE_FIELD_IGNORE_BITS (type
) =
6287 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6288 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6291 /* If the type has baseclasses, allocate and clear a bit vector for
6292 TYPE_FIELD_VIRTUAL_BITS. */
6293 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6295 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6296 unsigned char *pointer
;
6298 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6299 pointer
= TYPE_ALLOC (type
, num_bytes
);
6300 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6301 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6302 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6305 /* Copy the saved-up fields into the field vector. Start from the head
6306 of the list, adding to the tail of the field array, so that they end
6307 up in the same order in the array in which they were added to the list. */
6308 while (nfields
-- > 0)
6310 struct nextfield
*fieldp
;
6314 fieldp
= fip
->fields
;
6315 fip
->fields
= fieldp
->next
;
6319 fieldp
= fip
->baseclasses
;
6320 fip
->baseclasses
= fieldp
->next
;
6323 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6324 switch (fieldp
->accessibility
)
6326 case DW_ACCESS_private
:
6327 if (cu
->language
!= language_ada
)
6328 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6331 case DW_ACCESS_protected
:
6332 if (cu
->language
!= language_ada
)
6333 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6336 case DW_ACCESS_public
:
6340 /* Unknown accessibility. Complain and treat it as public. */
6342 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6343 fieldp
->accessibility
);
6347 if (nfields
< fip
->nbaseclasses
)
6349 switch (fieldp
->virtuality
)
6351 case DW_VIRTUALITY_virtual
:
6352 case DW_VIRTUALITY_pure_virtual
:
6353 if (cu
->language
== language_ada
)
6354 error ("unexpected virtuality in component of Ada type");
6355 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6362 /* Add a member function to the proper fieldlist. */
6365 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6366 struct type
*type
, struct dwarf2_cu
*cu
)
6368 struct objfile
*objfile
= cu
->objfile
;
6369 struct attribute
*attr
;
6370 struct fnfieldlist
*flp
;
6372 struct fn_field
*fnp
;
6374 struct nextfnfield
*new_fnfield
;
6375 struct type
*this_type
;
6377 if (cu
->language
== language_ada
)
6378 error ("unexpected member function in Ada type");
6380 /* Get name of member function. */
6381 fieldname
= dwarf2_name (die
, cu
);
6382 if (fieldname
== NULL
)
6385 /* Look up member function name in fieldlist. */
6386 for (i
= 0; i
< fip
->nfnfields
; i
++)
6388 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6392 /* Create new list element if necessary. */
6393 if (i
< fip
->nfnfields
)
6394 flp
= &fip
->fnfieldlists
[i
];
6397 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6399 fip
->fnfieldlists
= (struct fnfieldlist
*)
6400 xrealloc (fip
->fnfieldlists
,
6401 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6402 * sizeof (struct fnfieldlist
));
6403 if (fip
->nfnfields
== 0)
6404 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6406 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6407 flp
->name
= fieldname
;
6410 i
= fip
->nfnfields
++;
6413 /* Create a new member function field and chain it to the field list
6415 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6416 make_cleanup (xfree
, new_fnfield
);
6417 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6418 new_fnfield
->next
= flp
->head
;
6419 flp
->head
= new_fnfield
;
6422 /* Fill in the member function field info. */
6423 fnp
= &new_fnfield
->fnfield
;
6425 /* Delay processing of the physname until later. */
6426 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6428 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6433 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6434 fnp
->physname
= physname
? physname
: "";
6437 fnp
->type
= alloc_type (objfile
);
6438 this_type
= read_type_die (die
, cu
);
6439 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6441 int nparams
= TYPE_NFIELDS (this_type
);
6443 /* TYPE is the domain of this method, and THIS_TYPE is the type
6444 of the method itself (TYPE_CODE_METHOD). */
6445 smash_to_method_type (fnp
->type
, type
,
6446 TYPE_TARGET_TYPE (this_type
),
6447 TYPE_FIELDS (this_type
),
6448 TYPE_NFIELDS (this_type
),
6449 TYPE_VARARGS (this_type
));
6451 /* Handle static member functions.
6452 Dwarf2 has no clean way to discern C++ static and non-static
6453 member functions. G++ helps GDB by marking the first
6454 parameter for non-static member functions (which is the
6455 this pointer) as artificial. We obtain this information
6456 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6457 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6458 fnp
->voffset
= VOFFSET_STATIC
;
6461 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6462 dwarf2_full_name (fieldname
, die
, cu
));
6464 /* Get fcontext from DW_AT_containing_type if present. */
6465 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6466 fnp
->fcontext
= die_containing_type (die
, cu
);
6468 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6469 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6471 /* Get accessibility. */
6472 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6475 switch (DW_UNSND (attr
))
6477 case DW_ACCESS_private
:
6478 fnp
->is_private
= 1;
6480 case DW_ACCESS_protected
:
6481 fnp
->is_protected
= 1;
6486 /* Check for artificial methods. */
6487 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6488 if (attr
&& DW_UNSND (attr
) != 0)
6489 fnp
->is_artificial
= 1;
6491 /* Get index in virtual function table if it is a virtual member
6492 function. For older versions of GCC, this is an offset in the
6493 appropriate virtual table, as specified by DW_AT_containing_type.
6494 For everyone else, it is an expression to be evaluated relative
6495 to the object address. */
6497 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6500 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6502 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6504 /* Old-style GCC. */
6505 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6507 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6508 || (DW_BLOCK (attr
)->size
> 1
6509 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6510 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6512 struct dwarf_block blk
;
6515 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6517 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6518 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6519 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6520 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6521 dwarf2_complex_location_expr_complaint ();
6523 fnp
->voffset
/= cu
->header
.addr_size
;
6527 dwarf2_complex_location_expr_complaint ();
6530 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6532 else if (attr_form_is_section_offset (attr
))
6534 dwarf2_complex_location_expr_complaint ();
6538 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6544 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6545 if (attr
&& DW_UNSND (attr
))
6547 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6548 complaint (&symfile_complaints
,
6549 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6550 fieldname
, die
->offset
);
6551 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6552 TYPE_CPLUS_DYNAMIC (type
) = 1;
6557 /* Create the vector of member function fields, and attach it to the type. */
6560 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6561 struct dwarf2_cu
*cu
)
6563 struct fnfieldlist
*flp
;
6564 int total_length
= 0;
6567 if (cu
->language
== language_ada
)
6568 error ("unexpected member functions in Ada type");
6570 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6571 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6572 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6574 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6576 struct nextfnfield
*nfp
= flp
->head
;
6577 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6580 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6581 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6582 fn_flp
->fn_fields
= (struct fn_field
*)
6583 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6584 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6585 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6587 total_length
+= flp
->length
;
6590 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6591 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6594 /* Returns non-zero if NAME is the name of a vtable member in CU's
6595 language, zero otherwise. */
6597 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6599 static const char vptr
[] = "_vptr";
6600 static const char vtable
[] = "vtable";
6602 /* Look for the C++ and Java forms of the vtable. */
6603 if ((cu
->language
== language_java
6604 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6605 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6606 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6612 /* GCC outputs unnamed structures that are really pointers to member
6613 functions, with the ABI-specified layout. If TYPE describes
6614 such a structure, smash it into a member function type.
6616 GCC shouldn't do this; it should just output pointer to member DIEs.
6617 This is GCC PR debug/28767. */
6620 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6622 struct type
*pfn_type
, *domain_type
, *new_type
;
6624 /* Check for a structure with no name and two children. */
6625 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6628 /* Check for __pfn and __delta members. */
6629 if (TYPE_FIELD_NAME (type
, 0) == NULL
6630 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6631 || TYPE_FIELD_NAME (type
, 1) == NULL
6632 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6635 /* Find the type of the method. */
6636 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6637 if (pfn_type
== NULL
6638 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6639 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6642 /* Look for the "this" argument. */
6643 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6644 if (TYPE_NFIELDS (pfn_type
) == 0
6645 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6646 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6649 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6650 new_type
= alloc_type (objfile
);
6651 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6652 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6653 TYPE_VARARGS (pfn_type
));
6654 smash_to_methodptr_type (type
, new_type
);
6657 /* Called when we find the DIE that starts a structure or union scope
6658 (definition) to create a type for the structure or union. Fill in
6659 the type's name and general properties; the members will not be
6660 processed until process_structure_type.
6662 NOTE: we need to call these functions regardless of whether or not the
6663 DIE has a DW_AT_name attribute, since it might be an anonymous
6664 structure or union. This gets the type entered into our set of
6667 However, if the structure is incomplete (an opaque struct/union)
6668 then suppress creating a symbol table entry for it since gdb only
6669 wants to find the one with the complete definition. Note that if
6670 it is complete, we just call new_symbol, which does it's own
6671 checking about whether the struct/union is anonymous or not (and
6672 suppresses creating a symbol table entry itself). */
6674 static struct type
*
6675 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6677 struct objfile
*objfile
= cu
->objfile
;
6679 struct attribute
*attr
;
6682 /* If the definition of this type lives in .debug_types, read that type.
6683 Don't follow DW_AT_specification though, that will take us back up
6684 the chain and we want to go down. */
6685 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6688 struct dwarf2_cu
*type_cu
= cu
;
6689 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6691 /* We could just recurse on read_structure_type, but we need to call
6692 get_die_type to ensure only one type for this DIE is created.
6693 This is important, for example, because for c++ classes we need
6694 TYPE_NAME set which is only done by new_symbol. Blech. */
6695 type
= read_type_die (type_die
, type_cu
);
6697 /* TYPE_CU may not be the same as CU.
6698 Ensure TYPE is recorded in CU's type_hash table. */
6699 return set_die_type (die
, type
, cu
);
6702 type
= alloc_type (objfile
);
6703 INIT_CPLUS_SPECIFIC (type
);
6705 name
= dwarf2_name (die
, cu
);
6708 if (cu
->language
== language_cplus
6709 || cu
->language
== language_java
)
6711 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6713 /* dwarf2_full_name might have already finished building the DIE's
6714 type. If so, there is no need to continue. */
6715 if (get_die_type (die
, cu
) != NULL
)
6716 return get_die_type (die
, cu
);
6718 TYPE_TAG_NAME (type
) = full_name
;
6719 if (die
->tag
== DW_TAG_structure_type
6720 || die
->tag
== DW_TAG_class_type
)
6721 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6725 /* The name is already allocated along with this objfile, so
6726 we don't need to duplicate it for the type. */
6727 TYPE_TAG_NAME (type
) = (char *) name
;
6728 if (die
->tag
== DW_TAG_class_type
)
6729 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6733 if (die
->tag
== DW_TAG_structure_type
)
6735 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6737 else if (die
->tag
== DW_TAG_union_type
)
6739 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6743 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6746 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6747 TYPE_DECLARED_CLASS (type
) = 1;
6749 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6752 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6756 TYPE_LENGTH (type
) = 0;
6759 TYPE_STUB_SUPPORTED (type
) = 1;
6760 if (die_is_declaration (die
, cu
))
6761 TYPE_STUB (type
) = 1;
6762 else if (attr
== NULL
&& die
->child
== NULL
6763 && producer_is_realview (cu
->producer
))
6764 /* RealView does not output the required DW_AT_declaration
6765 on incomplete types. */
6766 TYPE_STUB (type
) = 1;
6768 /* We need to add the type field to the die immediately so we don't
6769 infinitely recurse when dealing with pointers to the structure
6770 type within the structure itself. */
6771 set_die_type (die
, type
, cu
);
6773 /* set_die_type should be already done. */
6774 set_descriptive_type (type
, die
, cu
);
6779 /* Finish creating a structure or union type, including filling in
6780 its members and creating a symbol for it. */
6783 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6785 struct objfile
*objfile
= cu
->objfile
;
6786 struct die_info
*child_die
= die
->child
;
6789 type
= get_die_type (die
, cu
);
6791 type
= read_structure_type (die
, cu
);
6793 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6795 struct field_info fi
;
6796 struct die_info
*child_die
;
6797 VEC (symbolp
) *template_args
= NULL
;
6798 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6800 memset (&fi
, 0, sizeof (struct field_info
));
6802 child_die
= die
->child
;
6804 while (child_die
&& child_die
->tag
)
6806 if (child_die
->tag
== DW_TAG_member
6807 || child_die
->tag
== DW_TAG_variable
)
6809 /* NOTE: carlton/2002-11-05: A C++ static data member
6810 should be a DW_TAG_member that is a declaration, but
6811 all versions of G++ as of this writing (so through at
6812 least 3.2.1) incorrectly generate DW_TAG_variable
6813 tags for them instead. */
6814 dwarf2_add_field (&fi
, child_die
, cu
);
6816 else if (child_die
->tag
== DW_TAG_subprogram
)
6818 /* C++ member function. */
6819 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6821 else if (child_die
->tag
== DW_TAG_inheritance
)
6823 /* C++ base class field. */
6824 dwarf2_add_field (&fi
, child_die
, cu
);
6826 else if (child_die
->tag
== DW_TAG_typedef
)
6827 dwarf2_add_typedef (&fi
, child_die
, cu
);
6828 else if (child_die
->tag
== DW_TAG_template_type_param
6829 || child_die
->tag
== DW_TAG_template_value_param
)
6831 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6834 VEC_safe_push (symbolp
, template_args
, arg
);
6837 child_die
= sibling_die (child_die
);
6840 /* Attach template arguments to type. */
6841 if (! VEC_empty (symbolp
, template_args
))
6843 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6844 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6845 = VEC_length (symbolp
, template_args
);
6846 TYPE_TEMPLATE_ARGUMENTS (type
)
6847 = obstack_alloc (&objfile
->objfile_obstack
,
6848 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6849 * sizeof (struct symbol
*)));
6850 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6851 VEC_address (symbolp
, template_args
),
6852 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6853 * sizeof (struct symbol
*)));
6854 VEC_free (symbolp
, template_args
);
6857 /* Attach fields and member functions to the type. */
6859 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
6862 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
6864 /* Get the type which refers to the base class (possibly this
6865 class itself) which contains the vtable pointer for the current
6866 class from the DW_AT_containing_type attribute. This use of
6867 DW_AT_containing_type is a GNU extension. */
6869 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6871 struct type
*t
= die_containing_type (die
, cu
);
6873 TYPE_VPTR_BASETYPE (type
) = t
;
6878 /* Our own class provides vtbl ptr. */
6879 for (i
= TYPE_NFIELDS (t
) - 1;
6880 i
>= TYPE_N_BASECLASSES (t
);
6883 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
6885 if (is_vtable_name (fieldname
, cu
))
6887 TYPE_VPTR_FIELDNO (type
) = i
;
6892 /* Complain if virtual function table field not found. */
6893 if (i
< TYPE_N_BASECLASSES (t
))
6894 complaint (&symfile_complaints
,
6895 _("virtual function table pointer not found when defining class '%s'"),
6896 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
6901 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
6904 else if (cu
->producer
6905 && strncmp (cu
->producer
,
6906 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6908 /* The IBM XLC compiler does not provide direct indication
6909 of the containing type, but the vtable pointer is
6910 always named __vfp. */
6914 for (i
= TYPE_NFIELDS (type
) - 1;
6915 i
>= TYPE_N_BASECLASSES (type
);
6918 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
6920 TYPE_VPTR_FIELDNO (type
) = i
;
6921 TYPE_VPTR_BASETYPE (type
) = type
;
6928 /* Copy fi.typedef_field_list linked list elements content into the
6929 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6930 if (fi
.typedef_field_list
)
6932 int i
= fi
.typedef_field_list_count
;
6934 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6935 TYPE_TYPEDEF_FIELD_ARRAY (type
)
6936 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
6937 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
6939 /* Reverse the list order to keep the debug info elements order. */
6942 struct typedef_field
*dest
, *src
;
6944 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
6945 src
= &fi
.typedef_field_list
->field
;
6946 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
6951 do_cleanups (back_to
);
6954 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
6956 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6957 snapshots) has been known to create a die giving a declaration
6958 for a class that has, as a child, a die giving a definition for a
6959 nested class. So we have to process our children even if the
6960 current die is a declaration. Normally, of course, a declaration
6961 won't have any children at all. */
6963 while (child_die
!= NULL
&& child_die
->tag
)
6965 if (child_die
->tag
== DW_TAG_member
6966 || child_die
->tag
== DW_TAG_variable
6967 || child_die
->tag
== DW_TAG_inheritance
6968 || child_die
->tag
== DW_TAG_template_value_param
6969 || child_die
->tag
== DW_TAG_template_type_param
)
6974 process_die (child_die
, cu
);
6976 child_die
= sibling_die (child_die
);
6979 /* Do not consider external references. According to the DWARF standard,
6980 these DIEs are identified by the fact that they have no byte_size
6981 attribute, and a declaration attribute. */
6982 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
6983 || !die_is_declaration (die
, cu
))
6984 new_symbol (die
, type
, cu
);
6987 /* Given a DW_AT_enumeration_type die, set its type. We do not
6988 complete the type's fields yet, or create any symbols. */
6990 static struct type
*
6991 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6993 struct objfile
*objfile
= cu
->objfile
;
6995 struct attribute
*attr
;
6998 /* If the definition of this type lives in .debug_types, read that type.
6999 Don't follow DW_AT_specification though, that will take us back up
7000 the chain and we want to go down. */
7001 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7004 struct dwarf2_cu
*type_cu
= cu
;
7005 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7007 type
= read_type_die (type_die
, type_cu
);
7009 /* TYPE_CU may not be the same as CU.
7010 Ensure TYPE is recorded in CU's type_hash table. */
7011 return set_die_type (die
, type
, cu
);
7014 type
= alloc_type (objfile
);
7016 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7017 name
= dwarf2_full_name (NULL
, die
, cu
);
7019 TYPE_TAG_NAME (type
) = (char *) name
;
7021 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7024 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7028 TYPE_LENGTH (type
) = 0;
7031 /* The enumeration DIE can be incomplete. In Ada, any type can be
7032 declared as private in the package spec, and then defined only
7033 inside the package body. Such types are known as Taft Amendment
7034 Types. When another package uses such a type, an incomplete DIE
7035 may be generated by the compiler. */
7036 if (die_is_declaration (die
, cu
))
7037 TYPE_STUB (type
) = 1;
7039 return set_die_type (die
, type
, cu
);
7042 /* Given a pointer to a die which begins an enumeration, process all
7043 the dies that define the members of the enumeration, and create the
7044 symbol for the enumeration type.
7046 NOTE: We reverse the order of the element list. */
7049 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7051 struct type
*this_type
;
7053 this_type
= get_die_type (die
, cu
);
7054 if (this_type
== NULL
)
7055 this_type
= read_enumeration_type (die
, cu
);
7057 if (die
->child
!= NULL
)
7059 struct die_info
*child_die
;
7061 struct field
*fields
= NULL
;
7063 int unsigned_enum
= 1;
7066 child_die
= die
->child
;
7067 while (child_die
&& child_die
->tag
)
7069 if (child_die
->tag
!= DW_TAG_enumerator
)
7071 process_die (child_die
, cu
);
7075 name
= dwarf2_name (child_die
, cu
);
7078 sym
= new_symbol (child_die
, this_type
, cu
);
7079 if (SYMBOL_VALUE (sym
) < 0)
7082 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7084 fields
= (struct field
*)
7086 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7087 * sizeof (struct field
));
7090 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7091 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7092 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7093 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7099 child_die
= sibling_die (child_die
);
7104 TYPE_NFIELDS (this_type
) = num_fields
;
7105 TYPE_FIELDS (this_type
) = (struct field
*)
7106 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7107 memcpy (TYPE_FIELDS (this_type
), fields
,
7108 sizeof (struct field
) * num_fields
);
7112 TYPE_UNSIGNED (this_type
) = 1;
7115 new_symbol (die
, this_type
, cu
);
7118 /* Extract all information from a DW_TAG_array_type DIE and put it in
7119 the DIE's type field. For now, this only handles one dimensional
7122 static struct type
*
7123 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7125 struct objfile
*objfile
= cu
->objfile
;
7126 struct die_info
*child_die
;
7128 struct type
*element_type
, *range_type
, *index_type
;
7129 struct type
**range_types
= NULL
;
7130 struct attribute
*attr
;
7132 struct cleanup
*back_to
;
7135 element_type
= die_type (die
, cu
);
7137 /* The die_type call above may have already set the type for this DIE. */
7138 type
= get_die_type (die
, cu
);
7142 /* Irix 6.2 native cc creates array types without children for
7143 arrays with unspecified length. */
7144 if (die
->child
== NULL
)
7146 index_type
= objfile_type (objfile
)->builtin_int
;
7147 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7148 type
= create_array_type (NULL
, element_type
, range_type
);
7149 return set_die_type (die
, type
, cu
);
7152 back_to
= make_cleanup (null_cleanup
, NULL
);
7153 child_die
= die
->child
;
7154 while (child_die
&& child_die
->tag
)
7156 if (child_die
->tag
== DW_TAG_subrange_type
)
7158 struct type
*child_type
= read_type_die (child_die
, cu
);
7160 if (child_type
!= NULL
)
7162 /* The range type was succesfully read. Save it for
7163 the array type creation. */
7164 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7166 range_types
= (struct type
**)
7167 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7168 * sizeof (struct type
*));
7170 make_cleanup (free_current_contents
, &range_types
);
7172 range_types
[ndim
++] = child_type
;
7175 child_die
= sibling_die (child_die
);
7178 /* Dwarf2 dimensions are output from left to right, create the
7179 necessary array types in backwards order. */
7181 type
= element_type
;
7183 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7188 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7193 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7196 /* Understand Dwarf2 support for vector types (like they occur on
7197 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7198 array type. This is not part of the Dwarf2/3 standard yet, but a
7199 custom vendor extension. The main difference between a regular
7200 array and the vector variant is that vectors are passed by value
7202 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7204 make_vector_type (type
);
7206 name
= dwarf2_name (die
, cu
);
7208 TYPE_NAME (type
) = name
;
7210 /* Install the type in the die. */
7211 set_die_type (die
, type
, cu
);
7213 /* set_die_type should be already done. */
7214 set_descriptive_type (type
, die
, cu
);
7216 do_cleanups (back_to
);
7221 static enum dwarf_array_dim_ordering
7222 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7224 struct attribute
*attr
;
7226 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7228 if (attr
) return DW_SND (attr
);
7231 GNU F77 is a special case, as at 08/2004 array type info is the
7232 opposite order to the dwarf2 specification, but data is still
7233 laid out as per normal fortran.
7235 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7239 if (cu
->language
== language_fortran
7240 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7242 return DW_ORD_row_major
;
7245 switch (cu
->language_defn
->la_array_ordering
)
7247 case array_column_major
:
7248 return DW_ORD_col_major
;
7249 case array_row_major
:
7251 return DW_ORD_row_major
;
7255 /* Extract all information from a DW_TAG_set_type DIE and put it in
7256 the DIE's type field. */
7258 static struct type
*
7259 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7261 struct type
*domain_type
, *set_type
;
7262 struct attribute
*attr
;
7264 domain_type
= die_type (die
, cu
);
7266 /* The die_type call above may have already set the type for this DIE. */
7267 set_type
= get_die_type (die
, cu
);
7271 set_type
= create_set_type (NULL
, domain_type
);
7273 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7275 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7277 return set_die_type (die
, set_type
, cu
);
7280 /* First cut: install each common block member as a global variable. */
7283 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7285 struct die_info
*child_die
;
7286 struct attribute
*attr
;
7288 CORE_ADDR base
= (CORE_ADDR
) 0;
7290 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7293 /* Support the .debug_loc offsets */
7294 if (attr_form_is_block (attr
))
7296 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7298 else if (attr_form_is_section_offset (attr
))
7300 dwarf2_complex_location_expr_complaint ();
7304 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7305 "common block member");
7308 if (die
->child
!= NULL
)
7310 child_die
= die
->child
;
7311 while (child_die
&& child_die
->tag
)
7313 sym
= new_symbol (child_die
, NULL
, cu
);
7314 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7315 if (sym
!= NULL
&& attr
!= NULL
)
7317 CORE_ADDR byte_offset
= 0;
7319 if (attr_form_is_section_offset (attr
))
7320 dwarf2_complex_location_expr_complaint ();
7321 else if (attr_form_is_constant (attr
))
7322 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7323 else if (attr_form_is_block (attr
))
7324 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7326 dwarf2_complex_location_expr_complaint ();
7328 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7329 add_symbol_to_list (sym
, &global_symbols
);
7331 child_die
= sibling_die (child_die
);
7336 /* Create a type for a C++ namespace. */
7338 static struct type
*
7339 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7341 struct objfile
*objfile
= cu
->objfile
;
7342 const char *previous_prefix
, *name
;
7346 /* For extensions, reuse the type of the original namespace. */
7347 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7349 struct die_info
*ext_die
;
7350 struct dwarf2_cu
*ext_cu
= cu
;
7352 ext_die
= dwarf2_extension (die
, &ext_cu
);
7353 type
= read_type_die (ext_die
, ext_cu
);
7355 /* EXT_CU may not be the same as CU.
7356 Ensure TYPE is recorded in CU's type_hash table. */
7357 return set_die_type (die
, type
, cu
);
7360 name
= namespace_name (die
, &is_anonymous
, cu
);
7362 /* Now build the name of the current namespace. */
7364 previous_prefix
= determine_prefix (die
, cu
);
7365 if (previous_prefix
[0] != '\0')
7366 name
= typename_concat (&objfile
->objfile_obstack
,
7367 previous_prefix
, name
, 0, cu
);
7369 /* Create the type. */
7370 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7372 TYPE_NAME (type
) = (char *) name
;
7373 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7375 return set_die_type (die
, type
, cu
);
7378 /* Read a C++ namespace. */
7381 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7383 struct objfile
*objfile
= cu
->objfile
;
7387 /* Add a symbol associated to this if we haven't seen the namespace
7388 before. Also, add a using directive if it's an anonymous
7391 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7395 type
= read_type_die (die
, cu
);
7396 new_symbol (die
, type
, cu
);
7398 name
= namespace_name (die
, &is_anonymous
, cu
);
7401 const char *previous_prefix
= determine_prefix (die
, cu
);
7403 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7404 NULL
, &objfile
->objfile_obstack
);
7408 if (die
->child
!= NULL
)
7410 struct die_info
*child_die
= die
->child
;
7412 while (child_die
&& child_die
->tag
)
7414 process_die (child_die
, cu
);
7415 child_die
= sibling_die (child_die
);
7420 /* Read a Fortran module as type. This DIE can be only a declaration used for
7421 imported module. Still we need that type as local Fortran "use ... only"
7422 declaration imports depend on the created type in determine_prefix. */
7424 static struct type
*
7425 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7427 struct objfile
*objfile
= cu
->objfile
;
7431 module_name
= dwarf2_name (die
, cu
);
7433 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
7435 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7437 /* determine_prefix uses TYPE_TAG_NAME. */
7438 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7440 return set_die_type (die
, type
, cu
);
7443 /* Read a Fortran module. */
7446 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7448 struct die_info
*child_die
= die
->child
;
7450 while (child_die
&& child_die
->tag
)
7452 process_die (child_die
, cu
);
7453 child_die
= sibling_die (child_die
);
7457 /* Return the name of the namespace represented by DIE. Set
7458 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7462 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7464 struct die_info
*current_die
;
7465 const char *name
= NULL
;
7467 /* Loop through the extensions until we find a name. */
7469 for (current_die
= die
;
7470 current_die
!= NULL
;
7471 current_die
= dwarf2_extension (die
, &cu
))
7473 name
= dwarf2_name (current_die
, cu
);
7478 /* Is it an anonymous namespace? */
7480 *is_anonymous
= (name
== NULL
);
7482 name
= "(anonymous namespace)";
7487 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7488 the user defined type vector. */
7490 static struct type
*
7491 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7493 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7494 struct comp_unit_head
*cu_header
= &cu
->header
;
7496 struct attribute
*attr_byte_size
;
7497 struct attribute
*attr_address_class
;
7498 int byte_size
, addr_class
;
7499 struct type
*target_type
;
7501 target_type
= die_type (die
, cu
);
7503 /* The die_type call above may have already set the type for this DIE. */
7504 type
= get_die_type (die
, cu
);
7508 type
= lookup_pointer_type (target_type
);
7510 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7512 byte_size
= DW_UNSND (attr_byte_size
);
7514 byte_size
= cu_header
->addr_size
;
7516 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7517 if (attr_address_class
)
7518 addr_class
= DW_UNSND (attr_address_class
);
7520 addr_class
= DW_ADDR_none
;
7522 /* If the pointer size or address class is different than the
7523 default, create a type variant marked as such and set the
7524 length accordingly. */
7525 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7527 if (gdbarch_address_class_type_flags_p (gdbarch
))
7531 type_flags
= gdbarch_address_class_type_flags
7532 (gdbarch
, byte_size
, addr_class
);
7533 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7535 type
= make_type_with_address_space (type
, type_flags
);
7537 else if (TYPE_LENGTH (type
) != byte_size
)
7539 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
7543 /* Should we also complain about unhandled address classes? */
7547 TYPE_LENGTH (type
) = byte_size
;
7548 return set_die_type (die
, type
, cu
);
7551 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7552 the user defined type vector. */
7554 static struct type
*
7555 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7558 struct type
*to_type
;
7559 struct type
*domain
;
7561 to_type
= die_type (die
, cu
);
7562 domain
= die_containing_type (die
, cu
);
7564 /* The calls above may have already set the type for this DIE. */
7565 type
= get_die_type (die
, cu
);
7569 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7570 type
= lookup_methodptr_type (to_type
);
7572 type
= lookup_memberptr_type (to_type
, domain
);
7574 return set_die_type (die
, type
, cu
);
7577 /* Extract all information from a DW_TAG_reference_type DIE and add to
7578 the user defined type vector. */
7580 static struct type
*
7581 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7583 struct comp_unit_head
*cu_header
= &cu
->header
;
7584 struct type
*type
, *target_type
;
7585 struct attribute
*attr
;
7587 target_type
= die_type (die
, cu
);
7589 /* The die_type call above may have already set the type for this DIE. */
7590 type
= get_die_type (die
, cu
);
7594 type
= lookup_reference_type (target_type
);
7595 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7598 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7602 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7604 return set_die_type (die
, type
, cu
);
7607 static struct type
*
7608 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7610 struct type
*base_type
, *cv_type
;
7612 base_type
= die_type (die
, cu
);
7614 /* The die_type call above may have already set the type for this DIE. */
7615 cv_type
= get_die_type (die
, cu
);
7619 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7620 return set_die_type (die
, cv_type
, cu
);
7623 static struct type
*
7624 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7626 struct type
*base_type
, *cv_type
;
7628 base_type
= die_type (die
, cu
);
7630 /* The die_type call above may have already set the type for this DIE. */
7631 cv_type
= get_die_type (die
, cu
);
7635 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7636 return set_die_type (die
, cv_type
, cu
);
7639 /* Extract all information from a DW_TAG_string_type DIE and add to
7640 the user defined type vector. It isn't really a user defined type,
7641 but it behaves like one, with other DIE's using an AT_user_def_type
7642 attribute to reference it. */
7644 static struct type
*
7645 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7647 struct objfile
*objfile
= cu
->objfile
;
7648 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7649 struct type
*type
, *range_type
, *index_type
, *char_type
;
7650 struct attribute
*attr
;
7651 unsigned int length
;
7653 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7656 length
= DW_UNSND (attr
);
7660 /* check for the DW_AT_byte_size attribute */
7661 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7664 length
= DW_UNSND (attr
);
7672 index_type
= objfile_type (objfile
)->builtin_int
;
7673 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7674 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7675 type
= create_string_type (NULL
, char_type
, range_type
);
7677 return set_die_type (die
, type
, cu
);
7680 /* Handle DIES due to C code like:
7684 int (*funcp)(int a, long l);
7688 ('funcp' generates a DW_TAG_subroutine_type DIE)
7691 static struct type
*
7692 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7694 struct type
*type
; /* Type that this function returns */
7695 struct type
*ftype
; /* Function that returns above type */
7696 struct attribute
*attr
;
7698 type
= die_type (die
, cu
);
7700 /* The die_type call above may have already set the type for this DIE. */
7701 ftype
= get_die_type (die
, cu
);
7705 ftype
= lookup_function_type (type
);
7707 /* All functions in C++, Pascal and Java have prototypes. */
7708 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7709 if ((attr
&& (DW_UNSND (attr
) != 0))
7710 || cu
->language
== language_cplus
7711 || cu
->language
== language_java
7712 || cu
->language
== language_pascal
)
7713 TYPE_PROTOTYPED (ftype
) = 1;
7714 else if (producer_is_realview (cu
->producer
))
7715 /* RealView does not emit DW_AT_prototyped. We can not
7716 distinguish prototyped and unprototyped functions; default to
7717 prototyped, since that is more common in modern code (and
7718 RealView warns about unprototyped functions). */
7719 TYPE_PROTOTYPED (ftype
) = 1;
7721 /* Store the calling convention in the type if it's available in
7722 the subroutine die. Otherwise set the calling convention to
7723 the default value DW_CC_normal. */
7724 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7725 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7727 /* We need to add the subroutine type to the die immediately so
7728 we don't infinitely recurse when dealing with parameters
7729 declared as the same subroutine type. */
7730 set_die_type (die
, ftype
, cu
);
7732 if (die
->child
!= NULL
)
7734 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7735 struct die_info
*child_die
;
7736 int nparams
, iparams
;
7738 /* Count the number of parameters.
7739 FIXME: GDB currently ignores vararg functions, but knows about
7740 vararg member functions. */
7742 child_die
= die
->child
;
7743 while (child_die
&& child_die
->tag
)
7745 if (child_die
->tag
== DW_TAG_formal_parameter
)
7747 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7748 TYPE_VARARGS (ftype
) = 1;
7749 child_die
= sibling_die (child_die
);
7752 /* Allocate storage for parameters and fill them in. */
7753 TYPE_NFIELDS (ftype
) = nparams
;
7754 TYPE_FIELDS (ftype
) = (struct field
*)
7755 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7757 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7758 even if we error out during the parameters reading below. */
7759 for (iparams
= 0; iparams
< nparams
; iparams
++)
7760 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7763 child_die
= die
->child
;
7764 while (child_die
&& child_die
->tag
)
7766 if (child_die
->tag
== DW_TAG_formal_parameter
)
7768 struct type
*arg_type
;
7770 /* DWARF version 2 has no clean way to discern C++
7771 static and non-static member functions. G++ helps
7772 GDB by marking the first parameter for non-static
7773 member functions (which is the this pointer) as
7774 artificial. We pass this information to
7775 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7777 DWARF version 3 added DW_AT_object_pointer, which GCC
7778 4.5 does not yet generate. */
7779 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7781 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7784 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7786 /* GCC/43521: In java, the formal parameter
7787 "this" is sometimes not marked with DW_AT_artificial. */
7788 if (cu
->language
== language_java
)
7790 const char *name
= dwarf2_name (child_die
, cu
);
7792 if (name
&& !strcmp (name
, "this"))
7793 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7796 arg_type
= die_type (child_die
, cu
);
7798 /* RealView does not mark THIS as const, which the testsuite
7799 expects. GCC marks THIS as const in method definitions,
7800 but not in the class specifications (GCC PR 43053). */
7801 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7802 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7805 struct dwarf2_cu
*arg_cu
= cu
;
7806 const char *name
= dwarf2_name (child_die
, cu
);
7808 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7811 /* If the compiler emits this, use it. */
7812 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
7815 else if (name
&& strcmp (name
, "this") == 0)
7816 /* Function definitions will have the argument names. */
7818 else if (name
== NULL
&& iparams
== 0)
7819 /* Declarations may not have the names, so like
7820 elsewhere in GDB, assume an artificial first
7821 argument is "this". */
7825 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
7829 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
7832 child_die
= sibling_die (child_die
);
7839 static struct type
*
7840 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
7842 struct objfile
*objfile
= cu
->objfile
;
7843 const char *name
= NULL
;
7844 struct type
*this_type
;
7846 name
= dwarf2_full_name (NULL
, die
, cu
);
7847 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
7848 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
7849 TYPE_NAME (this_type
) = (char *) name
;
7850 set_die_type (die
, this_type
, cu
);
7851 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
7855 /* Find a representation of a given base type and install
7856 it in the TYPE field of the die. */
7858 static struct type
*
7859 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7861 struct objfile
*objfile
= cu
->objfile
;
7863 struct attribute
*attr
;
7864 int encoding
= 0, size
= 0;
7866 enum type_code code
= TYPE_CODE_INT
;
7868 struct type
*target_type
= NULL
;
7870 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
7873 encoding
= DW_UNSND (attr
);
7875 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7878 size
= DW_UNSND (attr
);
7880 name
= dwarf2_name (die
, cu
);
7883 complaint (&symfile_complaints
,
7884 _("DW_AT_name missing from DW_TAG_base_type"));
7889 case DW_ATE_address
:
7890 /* Turn DW_ATE_address into a void * pointer. */
7891 code
= TYPE_CODE_PTR
;
7892 type_flags
|= TYPE_FLAG_UNSIGNED
;
7893 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
7895 case DW_ATE_boolean
:
7896 code
= TYPE_CODE_BOOL
;
7897 type_flags
|= TYPE_FLAG_UNSIGNED
;
7899 case DW_ATE_complex_float
:
7900 code
= TYPE_CODE_COMPLEX
;
7901 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
7903 case DW_ATE_decimal_float
:
7904 code
= TYPE_CODE_DECFLOAT
;
7907 code
= TYPE_CODE_FLT
;
7911 case DW_ATE_unsigned
:
7912 type_flags
|= TYPE_FLAG_UNSIGNED
;
7914 case DW_ATE_signed_char
:
7915 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7916 || cu
->language
== language_pascal
)
7917 code
= TYPE_CODE_CHAR
;
7919 case DW_ATE_unsigned_char
:
7920 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7921 || cu
->language
== language_pascal
)
7922 code
= TYPE_CODE_CHAR
;
7923 type_flags
|= TYPE_FLAG_UNSIGNED
;
7926 /* We just treat this as an integer and then recognize the
7927 type by name elsewhere. */
7931 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
7932 dwarf_type_encoding_name (encoding
));
7936 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
7937 TYPE_NAME (type
) = name
;
7938 TYPE_TARGET_TYPE (type
) = target_type
;
7940 if (name
&& strcmp (name
, "char") == 0)
7941 TYPE_NOSIGN (type
) = 1;
7943 return set_die_type (die
, type
, cu
);
7946 /* Read the given DW_AT_subrange DIE. */
7948 static struct type
*
7949 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7951 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7952 struct type
*base_type
;
7953 struct type
*range_type
;
7954 struct attribute
*attr
;
7958 LONGEST negative_mask
;
7960 base_type
= die_type (die
, cu
);
7961 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7962 check_typedef (base_type
);
7964 /* The die_type call above may have already set the type for this DIE. */
7965 range_type
= get_die_type (die
, cu
);
7969 if (cu
->language
== language_fortran
)
7971 /* FORTRAN implies a lower bound of 1, if not given. */
7975 /* FIXME: For variable sized arrays either of these could be
7976 a variable rather than a constant value. We'll allow it,
7977 but we don't know how to handle it. */
7978 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
7980 low
= dwarf2_get_attr_constant_value (attr
, 0);
7982 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
7985 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
7987 /* GCC encodes arrays with unspecified or dynamic length
7988 with a DW_FORM_block1 attribute or a reference attribute.
7989 FIXME: GDB does not yet know how to handle dynamic
7990 arrays properly, treat them as arrays with unspecified
7993 FIXME: jimb/2003-09-22: GDB does not really know
7994 how to handle arrays of unspecified length
7995 either; we just represent them as zero-length
7996 arrays. Choose an appropriate upper bound given
7997 the lower bound we've computed above. */
8001 high
= dwarf2_get_attr_constant_value (attr
, 1);
8005 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8008 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8009 high
= low
+ count
- 1;
8013 /* Dwarf-2 specifications explicitly allows to create subrange types
8014 without specifying a base type.
8015 In that case, the base type must be set to the type of
8016 the lower bound, upper bound or count, in that order, if any of these
8017 three attributes references an object that has a type.
8018 If no base type is found, the Dwarf-2 specifications say that
8019 a signed integer type of size equal to the size of an address should
8021 For the following C code: `extern char gdb_int [];'
8022 GCC produces an empty range DIE.
8023 FIXME: muller/2010-05-28: Possible references to object for low bound,
8024 high bound or count are not yet handled by this code.
8026 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8028 struct objfile
*objfile
= cu
->objfile
;
8029 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8030 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8031 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8033 /* Test "int", "long int", and "long long int" objfile types,
8034 and select the first one having a size above or equal to the
8035 architecture address size. */
8036 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8037 base_type
= int_type
;
8040 int_type
= objfile_type (objfile
)->builtin_long
;
8041 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8042 base_type
= int_type
;
8045 int_type
= objfile_type (objfile
)->builtin_long_long
;
8046 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8047 base_type
= int_type
;
8053 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8054 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8055 low
|= negative_mask
;
8056 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8057 high
|= negative_mask
;
8059 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8061 /* Mark arrays with dynamic length at least as an array of unspecified
8062 length. GDB could check the boundary but before it gets implemented at
8063 least allow accessing the array elements. */
8064 if (attr
&& attr
->form
== DW_FORM_block1
)
8065 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8067 name
= dwarf2_name (die
, cu
);
8069 TYPE_NAME (range_type
) = name
;
8071 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8073 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8075 set_die_type (die
, range_type
, cu
);
8077 /* set_die_type should be already done. */
8078 set_descriptive_type (range_type
, die
, cu
);
8083 static struct type
*
8084 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8088 /* For now, we only support the C meaning of an unspecified type: void. */
8090 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8091 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8093 return set_die_type (die
, type
, cu
);
8096 /* Trivial hash function for die_info: the hash value of a DIE
8097 is its offset in .debug_info for this objfile. */
8100 die_hash (const void *item
)
8102 const struct die_info
*die
= item
;
8107 /* Trivial comparison function for die_info structures: two DIEs
8108 are equal if they have the same offset. */
8111 die_eq (const void *item_lhs
, const void *item_rhs
)
8113 const struct die_info
*die_lhs
= item_lhs
;
8114 const struct die_info
*die_rhs
= item_rhs
;
8116 return die_lhs
->offset
== die_rhs
->offset
;
8119 /* Read a whole compilation unit into a linked list of dies. */
8121 static struct die_info
*
8122 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8124 struct die_reader_specs reader_specs
;
8125 int read_abbrevs
= 0;
8126 struct cleanup
*back_to
= NULL
;
8127 struct die_info
*die
;
8129 if (cu
->dwarf2_abbrevs
== NULL
)
8131 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8132 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8136 gdb_assert (cu
->die_hash
== NULL
);
8138 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8142 &cu
->comp_unit_obstack
,
8143 hashtab_obstack_allocate
,
8144 dummy_obstack_deallocate
);
8146 init_cu_die_reader (&reader_specs
, cu
);
8148 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8151 do_cleanups (back_to
);
8156 /* Main entry point for reading a DIE and all children.
8157 Read the DIE and dump it if requested. */
8159 static struct die_info
*
8160 read_die_and_children (const struct die_reader_specs
*reader
,
8162 gdb_byte
**new_info_ptr
,
8163 struct die_info
*parent
)
8165 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8166 new_info_ptr
, parent
);
8168 if (dwarf2_die_debug
)
8170 fprintf_unfiltered (gdb_stdlog
,
8171 "\nRead die from %s of %s:\n",
8172 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8174 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8176 : "unknown section",
8177 reader
->abfd
->filename
);
8178 dump_die (result
, dwarf2_die_debug
);
8184 /* Read a single die and all its descendents. Set the die's sibling
8185 field to NULL; set other fields in the die correctly, and set all
8186 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8187 location of the info_ptr after reading all of those dies. PARENT
8188 is the parent of the die in question. */
8190 static struct die_info
*
8191 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8193 gdb_byte
**new_info_ptr
,
8194 struct die_info
*parent
)
8196 struct die_info
*die
;
8200 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8203 *new_info_ptr
= cur_ptr
;
8206 store_in_ref_table (die
, reader
->cu
);
8209 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8213 *new_info_ptr
= cur_ptr
;
8216 die
->sibling
= NULL
;
8217 die
->parent
= parent
;
8221 /* Read a die, all of its descendents, and all of its siblings; set
8222 all of the fields of all of the dies correctly. Arguments are as
8223 in read_die_and_children. */
8225 static struct die_info
*
8226 read_die_and_siblings (const struct die_reader_specs
*reader
,
8228 gdb_byte
**new_info_ptr
,
8229 struct die_info
*parent
)
8231 struct die_info
*first_die
, *last_sibling
;
8235 first_die
= last_sibling
= NULL
;
8239 struct die_info
*die
8240 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8244 *new_info_ptr
= cur_ptr
;
8251 last_sibling
->sibling
= die
;
8257 /* Read the die from the .debug_info section buffer. Set DIEP to
8258 point to a newly allocated die with its information, except for its
8259 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8260 whether the die has children or not. */
8263 read_full_die (const struct die_reader_specs
*reader
,
8264 struct die_info
**diep
, gdb_byte
*info_ptr
,
8267 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8268 struct abbrev_info
*abbrev
;
8269 struct die_info
*die
;
8270 struct dwarf2_cu
*cu
= reader
->cu
;
8271 bfd
*abfd
= reader
->abfd
;
8273 offset
= info_ptr
- reader
->buffer
;
8274 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8275 info_ptr
+= bytes_read
;
8283 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8285 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8287 bfd_get_filename (abfd
));
8289 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8290 die
->offset
= offset
;
8291 die
->tag
= abbrev
->tag
;
8292 die
->abbrev
= abbrev_number
;
8294 die
->num_attrs
= abbrev
->num_attrs
;
8296 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8297 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8298 abfd
, info_ptr
, cu
);
8301 *has_children
= abbrev
->has_children
;
8305 /* In DWARF version 2, the description of the debugging information is
8306 stored in a separate .debug_abbrev section. Before we read any
8307 dies from a section we read in all abbreviations and install them
8308 in a hash table. This function also sets flags in CU describing
8309 the data found in the abbrev table. */
8312 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8314 struct comp_unit_head
*cu_header
= &cu
->header
;
8315 gdb_byte
*abbrev_ptr
;
8316 struct abbrev_info
*cur_abbrev
;
8317 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8318 unsigned int abbrev_form
, hash_number
;
8319 struct attr_abbrev
*cur_attrs
;
8320 unsigned int allocated_attrs
;
8322 /* Initialize dwarf2 abbrevs */
8323 obstack_init (&cu
->abbrev_obstack
);
8324 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8326 * sizeof (struct abbrev_info
*)));
8327 memset (cu
->dwarf2_abbrevs
, 0,
8328 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8330 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8331 &dwarf2_per_objfile
->abbrev
);
8332 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8333 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8334 abbrev_ptr
+= bytes_read
;
8336 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8337 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8339 /* loop until we reach an abbrev number of 0 */
8340 while (abbrev_number
)
8342 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8344 /* read in abbrev header */
8345 cur_abbrev
->number
= abbrev_number
;
8346 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8347 abbrev_ptr
+= bytes_read
;
8348 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8351 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8352 cu
->has_namespace_info
= 1;
8354 /* now read in declarations */
8355 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8356 abbrev_ptr
+= bytes_read
;
8357 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8358 abbrev_ptr
+= bytes_read
;
8361 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8363 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8365 = xrealloc (cur_attrs
, (allocated_attrs
8366 * sizeof (struct attr_abbrev
)));
8369 /* Record whether this compilation unit might have
8370 inter-compilation-unit references. If we don't know what form
8371 this attribute will have, then it might potentially be a
8372 DW_FORM_ref_addr, so we conservatively expect inter-CU
8375 if (abbrev_form
== DW_FORM_ref_addr
8376 || abbrev_form
== DW_FORM_indirect
)
8377 cu
->has_form_ref_addr
= 1;
8379 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8380 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8381 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8382 abbrev_ptr
+= bytes_read
;
8383 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8384 abbrev_ptr
+= bytes_read
;
8387 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8388 (cur_abbrev
->num_attrs
8389 * sizeof (struct attr_abbrev
)));
8390 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8391 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8393 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8394 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8395 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8397 /* Get next abbreviation.
8398 Under Irix6 the abbreviations for a compilation unit are not
8399 always properly terminated with an abbrev number of 0.
8400 Exit loop if we encounter an abbreviation which we have
8401 already read (which means we are about to read the abbreviations
8402 for the next compile unit) or if the end of the abbreviation
8403 table is reached. */
8404 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8405 >= dwarf2_per_objfile
->abbrev
.size
)
8407 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8408 abbrev_ptr
+= bytes_read
;
8409 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8416 /* Release the memory used by the abbrev table for a compilation unit. */
8419 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8421 struct dwarf2_cu
*cu
= ptr_to_cu
;
8423 obstack_free (&cu
->abbrev_obstack
, NULL
);
8424 cu
->dwarf2_abbrevs
= NULL
;
8427 /* Lookup an abbrev_info structure in the abbrev hash table. */
8429 static struct abbrev_info
*
8430 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8432 unsigned int hash_number
;
8433 struct abbrev_info
*abbrev
;
8435 hash_number
= number
% ABBREV_HASH_SIZE
;
8436 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8440 if (abbrev
->number
== number
)
8443 abbrev
= abbrev
->next
;
8448 /* Returns nonzero if TAG represents a type that we might generate a partial
8452 is_type_tag_for_partial (int tag
)
8457 /* Some types that would be reasonable to generate partial symbols for,
8458 that we don't at present. */
8459 case DW_TAG_array_type
:
8460 case DW_TAG_file_type
:
8461 case DW_TAG_ptr_to_member_type
:
8462 case DW_TAG_set_type
:
8463 case DW_TAG_string_type
:
8464 case DW_TAG_subroutine_type
:
8466 case DW_TAG_base_type
:
8467 case DW_TAG_class_type
:
8468 case DW_TAG_interface_type
:
8469 case DW_TAG_enumeration_type
:
8470 case DW_TAG_structure_type
:
8471 case DW_TAG_subrange_type
:
8472 case DW_TAG_typedef
:
8473 case DW_TAG_union_type
:
8480 /* Load all DIEs that are interesting for partial symbols into memory. */
8482 static struct partial_die_info
*
8483 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8484 int building_psymtab
, struct dwarf2_cu
*cu
)
8486 struct partial_die_info
*part_die
;
8487 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8488 struct abbrev_info
*abbrev
;
8489 unsigned int bytes_read
;
8490 unsigned int load_all
= 0;
8492 int nesting_level
= 1;
8497 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8501 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8505 &cu
->comp_unit_obstack
,
8506 hashtab_obstack_allocate
,
8507 dummy_obstack_deallocate
);
8509 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8510 sizeof (struct partial_die_info
));
8514 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8516 /* A NULL abbrev means the end of a series of children. */
8519 if (--nesting_level
== 0)
8521 /* PART_DIE was probably the last thing allocated on the
8522 comp_unit_obstack, so we could call obstack_free
8523 here. We don't do that because the waste is small,
8524 and will be cleaned up when we're done with this
8525 compilation unit. This way, we're also more robust
8526 against other users of the comp_unit_obstack. */
8529 info_ptr
+= bytes_read
;
8530 last_die
= parent_die
;
8531 parent_die
= parent_die
->die_parent
;
8535 /* Check for template arguments. We never save these; if
8536 they're seen, we just mark the parent, and go on our way. */
8537 if (parent_die
!= NULL
8538 && cu
->language
== language_cplus
8539 && (abbrev
->tag
== DW_TAG_template_type_param
8540 || abbrev
->tag
== DW_TAG_template_value_param
))
8542 parent_die
->has_template_arguments
= 1;
8546 /* We don't need a partial DIE for the template argument. */
8547 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8553 /* We only recurse into subprograms looking for template arguments.
8554 Skip their other children. */
8556 && cu
->language
== language_cplus
8557 && parent_die
!= NULL
8558 && parent_die
->tag
== DW_TAG_subprogram
)
8560 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8564 /* Check whether this DIE is interesting enough to save. Normally
8565 we would not be interested in members here, but there may be
8566 later variables referencing them via DW_AT_specification (for
8569 && !is_type_tag_for_partial (abbrev
->tag
)
8570 && abbrev
->tag
!= DW_TAG_enumerator
8571 && abbrev
->tag
!= DW_TAG_subprogram
8572 && abbrev
->tag
!= DW_TAG_lexical_block
8573 && abbrev
->tag
!= DW_TAG_variable
8574 && abbrev
->tag
!= DW_TAG_namespace
8575 && abbrev
->tag
!= DW_TAG_module
8576 && abbrev
->tag
!= DW_TAG_member
)
8578 /* Otherwise we skip to the next sibling, if any. */
8579 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8583 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8584 buffer
, info_ptr
, cu
);
8586 /* This two-pass algorithm for processing partial symbols has a
8587 high cost in cache pressure. Thus, handle some simple cases
8588 here which cover the majority of C partial symbols. DIEs
8589 which neither have specification tags in them, nor could have
8590 specification tags elsewhere pointing at them, can simply be
8591 processed and discarded.
8593 This segment is also optional; scan_partial_symbols and
8594 add_partial_symbol will handle these DIEs if we chain
8595 them in normally. When compilers which do not emit large
8596 quantities of duplicate debug information are more common,
8597 this code can probably be removed. */
8599 /* Any complete simple types at the top level (pretty much all
8600 of them, for a language without namespaces), can be processed
8602 if (parent_die
== NULL
8603 && part_die
->has_specification
== 0
8604 && part_die
->is_declaration
== 0
8605 && (part_die
->tag
== DW_TAG_typedef
8606 || part_die
->tag
== DW_TAG_base_type
8607 || part_die
->tag
== DW_TAG_subrange_type
))
8609 if (building_psymtab
&& part_die
->name
!= NULL
)
8610 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8611 VAR_DOMAIN
, LOC_TYPEDEF
,
8612 &cu
->objfile
->static_psymbols
,
8613 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8614 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8618 /* If we're at the second level, and we're an enumerator, and
8619 our parent has no specification (meaning possibly lives in a
8620 namespace elsewhere), then we can add the partial symbol now
8621 instead of queueing it. */
8622 if (part_die
->tag
== DW_TAG_enumerator
8623 && parent_die
!= NULL
8624 && parent_die
->die_parent
== NULL
8625 && parent_die
->tag
== DW_TAG_enumeration_type
8626 && parent_die
->has_specification
== 0)
8628 if (part_die
->name
== NULL
)
8629 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8630 else if (building_psymtab
)
8631 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8632 VAR_DOMAIN
, LOC_CONST
,
8633 (cu
->language
== language_cplus
8634 || cu
->language
== language_java
)
8635 ? &cu
->objfile
->global_psymbols
8636 : &cu
->objfile
->static_psymbols
,
8637 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8639 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8643 /* We'll save this DIE so link it in. */
8644 part_die
->die_parent
= parent_die
;
8645 part_die
->die_sibling
= NULL
;
8646 part_die
->die_child
= NULL
;
8648 if (last_die
&& last_die
== parent_die
)
8649 last_die
->die_child
= part_die
;
8651 last_die
->die_sibling
= part_die
;
8653 last_die
= part_die
;
8655 if (first_die
== NULL
)
8656 first_die
= part_die
;
8658 /* Maybe add the DIE to the hash table. Not all DIEs that we
8659 find interesting need to be in the hash table, because we
8660 also have the parent/sibling/child chains; only those that we
8661 might refer to by offset later during partial symbol reading.
8663 For now this means things that might have be the target of a
8664 DW_AT_specification, DW_AT_abstract_origin, or
8665 DW_AT_extension. DW_AT_extension will refer only to
8666 namespaces; DW_AT_abstract_origin refers to functions (and
8667 many things under the function DIE, but we do not recurse
8668 into function DIEs during partial symbol reading) and
8669 possibly variables as well; DW_AT_specification refers to
8670 declarations. Declarations ought to have the DW_AT_declaration
8671 flag. It happens that GCC forgets to put it in sometimes, but
8672 only for functions, not for types.
8674 Adding more things than necessary to the hash table is harmless
8675 except for the performance cost. Adding too few will result in
8676 wasted time in find_partial_die, when we reread the compilation
8677 unit with load_all_dies set. */
8680 || abbrev
->tag
== DW_TAG_subprogram
8681 || abbrev
->tag
== DW_TAG_variable
8682 || abbrev
->tag
== DW_TAG_namespace
8683 || part_die
->is_declaration
)
8687 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8688 part_die
->offset
, INSERT
);
8692 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8693 sizeof (struct partial_die_info
));
8695 /* For some DIEs we want to follow their children (if any). For C
8696 we have no reason to follow the children of structures; for other
8697 languages we have to, so that we can get at method physnames
8698 to infer fully qualified class names, for DW_AT_specification,
8699 and for C++ template arguments. For C++, we also look one level
8700 inside functions to find template arguments (if the name of the
8701 function does not already contain the template arguments).
8703 For Ada, we need to scan the children of subprograms and lexical
8704 blocks as well because Ada allows the definition of nested
8705 entities that could be interesting for the debugger, such as
8706 nested subprograms for instance. */
8707 if (last_die
->has_children
8709 || last_die
->tag
== DW_TAG_namespace
8710 || last_die
->tag
== DW_TAG_module
8711 || last_die
->tag
== DW_TAG_enumeration_type
8712 || (cu
->language
== language_cplus
8713 && last_die
->tag
== DW_TAG_subprogram
8714 && (last_die
->name
== NULL
8715 || strchr (last_die
->name
, '<') == NULL
))
8716 || (cu
->language
!= language_c
8717 && (last_die
->tag
== DW_TAG_class_type
8718 || last_die
->tag
== DW_TAG_interface_type
8719 || last_die
->tag
== DW_TAG_structure_type
8720 || last_die
->tag
== DW_TAG_union_type
))
8721 || (cu
->language
== language_ada
8722 && (last_die
->tag
== DW_TAG_subprogram
8723 || last_die
->tag
== DW_TAG_lexical_block
))))
8726 parent_die
= last_die
;
8730 /* Otherwise we skip to the next sibling, if any. */
8731 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8733 /* Back to the top, do it again. */
8737 /* Read a minimal amount of information into the minimal die structure. */
8740 read_partial_die (struct partial_die_info
*part_die
,
8741 struct abbrev_info
*abbrev
,
8742 unsigned int abbrev_len
, bfd
*abfd
,
8743 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8744 struct dwarf2_cu
*cu
)
8747 struct attribute attr
;
8748 int has_low_pc_attr
= 0;
8749 int has_high_pc_attr
= 0;
8751 memset (part_die
, 0, sizeof (struct partial_die_info
));
8753 part_die
->offset
= info_ptr
- buffer
;
8755 info_ptr
+= abbrev_len
;
8760 part_die
->tag
= abbrev
->tag
;
8761 part_die
->has_children
= abbrev
->has_children
;
8763 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8765 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8767 /* Store the data if it is of an attribute we want to keep in a
8768 partial symbol table. */
8772 switch (part_die
->tag
)
8774 case DW_TAG_compile_unit
:
8775 case DW_TAG_type_unit
:
8776 /* Compilation units have a DW_AT_name that is a filename, not
8777 a source language identifier. */
8778 case DW_TAG_enumeration_type
:
8779 case DW_TAG_enumerator
:
8780 /* These tags always have simple identifiers already; no need
8781 to canonicalize them. */
8782 part_die
->name
= DW_STRING (&attr
);
8786 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8787 &cu
->objfile
->objfile_obstack
);
8791 case DW_AT_linkage_name
:
8792 case DW_AT_MIPS_linkage_name
:
8793 /* Note that both forms of linkage name might appear. We
8794 assume they will be the same, and we only store the last
8796 if (cu
->language
== language_ada
)
8797 part_die
->name
= DW_STRING (&attr
);
8800 has_low_pc_attr
= 1;
8801 part_die
->lowpc
= DW_ADDR (&attr
);
8804 has_high_pc_attr
= 1;
8805 part_die
->highpc
= DW_ADDR (&attr
);
8807 case DW_AT_location
:
8808 /* Support the .debug_loc offsets */
8809 if (attr_form_is_block (&attr
))
8811 part_die
->locdesc
= DW_BLOCK (&attr
);
8813 else if (attr_form_is_section_offset (&attr
))
8815 dwarf2_complex_location_expr_complaint ();
8819 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8820 "partial symbol information");
8823 case DW_AT_external
:
8824 part_die
->is_external
= DW_UNSND (&attr
);
8826 case DW_AT_declaration
:
8827 part_die
->is_declaration
= DW_UNSND (&attr
);
8830 part_die
->has_type
= 1;
8832 case DW_AT_abstract_origin
:
8833 case DW_AT_specification
:
8834 case DW_AT_extension
:
8835 part_die
->has_specification
= 1;
8836 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
8839 /* Ignore absolute siblings, they might point outside of
8840 the current compile unit. */
8841 if (attr
.form
== DW_FORM_ref_addr
)
8842 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
8844 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
8846 case DW_AT_byte_size
:
8847 part_die
->has_byte_size
= 1;
8849 case DW_AT_calling_convention
:
8850 /* DWARF doesn't provide a way to identify a program's source-level
8851 entry point. DW_AT_calling_convention attributes are only meant
8852 to describe functions' calling conventions.
8854 However, because it's a necessary piece of information in
8855 Fortran, and because DW_CC_program is the only piece of debugging
8856 information whose definition refers to a 'main program' at all,
8857 several compilers have begun marking Fortran main programs with
8858 DW_CC_program --- even when those functions use the standard
8859 calling conventions.
8861 So until DWARF specifies a way to provide this information and
8862 compilers pick up the new representation, we'll support this
8864 if (DW_UNSND (&attr
) == DW_CC_program
8865 && cu
->language
== language_fortran
)
8866 set_main_name (part_die
->name
);
8873 /* When using the GNU linker, .gnu.linkonce. sections are used to
8874 eliminate duplicate copies of functions and vtables and such.
8875 The linker will arbitrarily choose one and discard the others.
8876 The AT_*_pc values for such functions refer to local labels in
8877 these sections. If the section from that file was discarded, the
8878 labels are not in the output, so the relocs get a value of 0.
8879 If this is a discarded function, mark the pc bounds as invalid,
8880 so that GDB will ignore it. */
8881 if (has_low_pc_attr
&& has_high_pc_attr
8882 && part_die
->lowpc
< part_die
->highpc
8883 && (part_die
->lowpc
!= 0
8884 || dwarf2_per_objfile
->has_section_at_zero
))
8885 part_die
->has_pc_info
= 1;
8890 /* Find a cached partial DIE at OFFSET in CU. */
8892 static struct partial_die_info
*
8893 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
8895 struct partial_die_info
*lookup_die
= NULL
;
8896 struct partial_die_info part_die
;
8898 part_die
.offset
= offset
;
8899 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
8904 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8905 except in the case of .debug_types DIEs which do not reference
8906 outside their CU (they do however referencing other types via
8909 static struct partial_die_info
*
8910 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
8912 struct dwarf2_per_cu_data
*per_cu
= NULL
;
8913 struct partial_die_info
*pd
= NULL
;
8915 if (cu
->per_cu
->from_debug_types
)
8917 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8923 if (offset_in_cu_p (&cu
->header
, offset
))
8925 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8930 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
8932 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
8933 load_partial_comp_unit (per_cu
, cu
->objfile
);
8935 per_cu
->cu
->last_used
= 0;
8936 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8938 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
8940 struct cleanup
*back_to
;
8941 struct partial_die_info comp_unit_die
;
8942 struct abbrev_info
*abbrev
;
8943 unsigned int bytes_read
;
8946 per_cu
->load_all_dies
= 1;
8948 /* Re-read the DIEs. */
8949 back_to
= make_cleanup (null_cleanup
, 0);
8950 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
8952 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
8953 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
8955 info_ptr
= (dwarf2_per_objfile
->info
.buffer
8956 + per_cu
->cu
->header
.offset
8957 + per_cu
->cu
->header
.first_die_offset
);
8958 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
8959 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
8960 per_cu
->cu
->objfile
->obfd
,
8961 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8963 if (comp_unit_die
.has_children
)
8964 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
8965 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8967 do_cleanups (back_to
);
8969 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8975 internal_error (__FILE__
, __LINE__
,
8976 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8977 offset
, bfd_get_filename (cu
->objfile
->obfd
));
8981 /* Adjust PART_DIE before generating a symbol for it. This function
8982 may set the is_external flag or change the DIE's name. */
8985 fixup_partial_die (struct partial_die_info
*part_die
,
8986 struct dwarf2_cu
*cu
)
8988 /* If we found a reference attribute and the DIE has no name, try
8989 to find a name in the referred to DIE. */
8991 if (part_die
->name
== NULL
&& part_die
->has_specification
)
8993 struct partial_die_info
*spec_die
;
8995 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
8997 fixup_partial_die (spec_die
, cu
);
9001 part_die
->name
= spec_die
->name
;
9003 /* Copy DW_AT_external attribute if it is set. */
9004 if (spec_die
->is_external
)
9005 part_die
->is_external
= spec_die
->is_external
;
9009 /* Set default names for some unnamed DIEs. */
9011 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9012 part_die
->name
= "(anonymous namespace)";
9014 if (part_die
->tag
== DW_TAG_structure_type
9015 || part_die
->tag
== DW_TAG_class_type
9016 || part_die
->tag
== DW_TAG_union_type
)
9017 guess_structure_name (part_die
, cu
);
9020 /* Read an attribute value described by an attribute form. */
9023 read_attribute_value (struct attribute
*attr
, unsigned form
,
9024 bfd
*abfd
, gdb_byte
*info_ptr
,
9025 struct dwarf2_cu
*cu
)
9027 struct comp_unit_head
*cu_header
= &cu
->header
;
9028 unsigned int bytes_read
;
9029 struct dwarf_block
*blk
;
9034 case DW_FORM_ref_addr
:
9035 if (cu
->header
.version
== 2)
9036 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9038 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9039 info_ptr
+= bytes_read
;
9042 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9043 info_ptr
+= bytes_read
;
9045 case DW_FORM_block2
:
9046 blk
= dwarf_alloc_block (cu
);
9047 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9049 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9050 info_ptr
+= blk
->size
;
9051 DW_BLOCK (attr
) = blk
;
9053 case DW_FORM_block4
:
9054 blk
= dwarf_alloc_block (cu
);
9055 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9057 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9058 info_ptr
+= blk
->size
;
9059 DW_BLOCK (attr
) = blk
;
9062 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9066 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9070 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9073 case DW_FORM_sec_offset
:
9074 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9075 info_ptr
+= bytes_read
;
9077 case DW_FORM_string
:
9078 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9079 DW_STRING_IS_CANONICAL (attr
) = 0;
9080 info_ptr
+= bytes_read
;
9083 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9085 DW_STRING_IS_CANONICAL (attr
) = 0;
9086 info_ptr
+= bytes_read
;
9088 case DW_FORM_exprloc
:
9090 blk
= dwarf_alloc_block (cu
);
9091 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9092 info_ptr
+= bytes_read
;
9093 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9094 info_ptr
+= blk
->size
;
9095 DW_BLOCK (attr
) = blk
;
9097 case DW_FORM_block1
:
9098 blk
= dwarf_alloc_block (cu
);
9099 blk
->size
= read_1_byte (abfd
, info_ptr
);
9101 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9102 info_ptr
+= blk
->size
;
9103 DW_BLOCK (attr
) = blk
;
9106 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9110 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9113 case DW_FORM_flag_present
:
9114 DW_UNSND (attr
) = 1;
9117 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9118 info_ptr
+= bytes_read
;
9121 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9122 info_ptr
+= bytes_read
;
9125 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9129 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9133 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9137 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9141 /* Convert the signature to something we can record in DW_UNSND
9143 NOTE: This is NULL if the type wasn't found. */
9144 DW_SIGNATURED_TYPE (attr
) =
9145 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9148 case DW_FORM_ref_udata
:
9149 DW_ADDR (attr
) = (cu
->header
.offset
9150 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9151 info_ptr
+= bytes_read
;
9153 case DW_FORM_indirect
:
9154 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9155 info_ptr
+= bytes_read
;
9156 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9159 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9160 dwarf_form_name (form
),
9161 bfd_get_filename (abfd
));
9164 /* We have seen instances where the compiler tried to emit a byte
9165 size attribute of -1 which ended up being encoded as an unsigned
9166 0xffffffff. Although 0xffffffff is technically a valid size value,
9167 an object of this size seems pretty unlikely so we can relatively
9168 safely treat these cases as if the size attribute was invalid and
9169 treat them as zero by default. */
9170 if (attr
->name
== DW_AT_byte_size
9171 && form
== DW_FORM_data4
9172 && DW_UNSND (attr
) >= 0xffffffff)
9175 (&symfile_complaints
,
9176 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9177 hex_string (DW_UNSND (attr
)));
9178 DW_UNSND (attr
) = 0;
9184 /* Read an attribute described by an abbreviated attribute. */
9187 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9188 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9190 attr
->name
= abbrev
->name
;
9191 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9194 /* read dwarf information from a buffer */
9197 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9199 return bfd_get_8 (abfd
, buf
);
9203 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9205 return bfd_get_signed_8 (abfd
, buf
);
9209 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9211 return bfd_get_16 (abfd
, buf
);
9215 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9217 return bfd_get_signed_16 (abfd
, buf
);
9221 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9223 return bfd_get_32 (abfd
, buf
);
9227 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9229 return bfd_get_signed_32 (abfd
, buf
);
9233 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9235 return bfd_get_64 (abfd
, buf
);
9239 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9240 unsigned int *bytes_read
)
9242 struct comp_unit_head
*cu_header
= &cu
->header
;
9243 CORE_ADDR retval
= 0;
9245 if (cu_header
->signed_addr_p
)
9247 switch (cu_header
->addr_size
)
9250 retval
= bfd_get_signed_16 (abfd
, buf
);
9253 retval
= bfd_get_signed_32 (abfd
, buf
);
9256 retval
= bfd_get_signed_64 (abfd
, buf
);
9259 internal_error (__FILE__
, __LINE__
,
9260 _("read_address: bad switch, signed [in module %s]"),
9261 bfd_get_filename (abfd
));
9266 switch (cu_header
->addr_size
)
9269 retval
= bfd_get_16 (abfd
, buf
);
9272 retval
= bfd_get_32 (abfd
, buf
);
9275 retval
= bfd_get_64 (abfd
, buf
);
9278 internal_error (__FILE__
, __LINE__
,
9279 _("read_address: bad switch, unsigned [in module %s]"),
9280 bfd_get_filename (abfd
));
9284 *bytes_read
= cu_header
->addr_size
;
9288 /* Read the initial length from a section. The (draft) DWARF 3
9289 specification allows the initial length to take up either 4 bytes
9290 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9291 bytes describe the length and all offsets will be 8 bytes in length
9294 An older, non-standard 64-bit format is also handled by this
9295 function. The older format in question stores the initial length
9296 as an 8-byte quantity without an escape value. Lengths greater
9297 than 2^32 aren't very common which means that the initial 4 bytes
9298 is almost always zero. Since a length value of zero doesn't make
9299 sense for the 32-bit format, this initial zero can be considered to
9300 be an escape value which indicates the presence of the older 64-bit
9301 format. As written, the code can't detect (old format) lengths
9302 greater than 4GB. If it becomes necessary to handle lengths
9303 somewhat larger than 4GB, we could allow other small values (such
9304 as the non-sensical values of 1, 2, and 3) to also be used as
9305 escape values indicating the presence of the old format.
9307 The value returned via bytes_read should be used to increment the
9308 relevant pointer after calling read_initial_length().
9310 [ Note: read_initial_length() and read_offset() are based on the
9311 document entitled "DWARF Debugging Information Format", revision
9312 3, draft 8, dated November 19, 2001. This document was obtained
9315 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9317 This document is only a draft and is subject to change. (So beware.)
9319 Details regarding the older, non-standard 64-bit format were
9320 determined empirically by examining 64-bit ELF files produced by
9321 the SGI toolchain on an IRIX 6.5 machine.
9323 - Kevin, July 16, 2002
9327 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9329 LONGEST length
= bfd_get_32 (abfd
, buf
);
9331 if (length
== 0xffffffff)
9333 length
= bfd_get_64 (abfd
, buf
+ 4);
9336 else if (length
== 0)
9338 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9339 length
= bfd_get_64 (abfd
, buf
);
9350 /* Cover function for read_initial_length.
9351 Returns the length of the object at BUF, and stores the size of the
9352 initial length in *BYTES_READ and stores the size that offsets will be in
9354 If the initial length size is not equivalent to that specified in
9355 CU_HEADER then issue a complaint.
9356 This is useful when reading non-comp-unit headers. */
9359 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9360 const struct comp_unit_head
*cu_header
,
9361 unsigned int *bytes_read
,
9362 unsigned int *offset_size
)
9364 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9366 gdb_assert (cu_header
->initial_length_size
== 4
9367 || cu_header
->initial_length_size
== 8
9368 || cu_header
->initial_length_size
== 12);
9370 if (cu_header
->initial_length_size
!= *bytes_read
)
9371 complaint (&symfile_complaints
,
9372 _("intermixed 32-bit and 64-bit DWARF sections"));
9374 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9378 /* Read an offset from the data stream. The size of the offset is
9379 given by cu_header->offset_size. */
9382 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9383 unsigned int *bytes_read
)
9385 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9387 *bytes_read
= cu_header
->offset_size
;
9391 /* Read an offset from the data stream. */
9394 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9398 switch (offset_size
)
9401 retval
= bfd_get_32 (abfd
, buf
);
9404 retval
= bfd_get_64 (abfd
, buf
);
9407 internal_error (__FILE__
, __LINE__
,
9408 _("read_offset_1: bad switch [in module %s]"),
9409 bfd_get_filename (abfd
));
9416 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9418 /* If the size of a host char is 8 bits, we can return a pointer
9419 to the buffer, otherwise we have to copy the data to a buffer
9420 allocated on the temporary obstack. */
9421 gdb_assert (HOST_CHAR_BIT
== 8);
9426 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9428 /* If the size of a host char is 8 bits, we can return a pointer
9429 to the string, otherwise we have to copy the string to a buffer
9430 allocated on the temporary obstack. */
9431 gdb_assert (HOST_CHAR_BIT
== 8);
9434 *bytes_read_ptr
= 1;
9437 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9438 return (char *) buf
;
9442 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9443 const struct comp_unit_head
*cu_header
,
9444 unsigned int *bytes_read_ptr
)
9446 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9448 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9449 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9451 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9452 bfd_get_filename (abfd
));
9455 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9457 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9458 bfd_get_filename (abfd
));
9461 gdb_assert (HOST_CHAR_BIT
== 8);
9462 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9464 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9467 static unsigned long
9468 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9470 unsigned long result
;
9471 unsigned int num_read
;
9481 byte
= bfd_get_8 (abfd
, buf
);
9484 result
|= ((unsigned long)(byte
& 127) << shift
);
9485 if ((byte
& 128) == 0)
9491 *bytes_read_ptr
= num_read
;
9496 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9499 int i
, shift
, num_read
;
9508 byte
= bfd_get_8 (abfd
, buf
);
9511 result
|= ((long)(byte
& 127) << shift
);
9513 if ((byte
& 128) == 0)
9518 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9519 result
|= -(((long)1) << shift
);
9520 *bytes_read_ptr
= num_read
;
9524 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9527 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9533 byte
= bfd_get_8 (abfd
, buf
);
9535 if ((byte
& 128) == 0)
9541 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9548 cu
->language
= language_c
;
9550 case DW_LANG_C_plus_plus
:
9551 cu
->language
= language_cplus
;
9554 cu
->language
= language_d
;
9556 case DW_LANG_Fortran77
:
9557 case DW_LANG_Fortran90
:
9558 case DW_LANG_Fortran95
:
9559 cu
->language
= language_fortran
;
9561 case DW_LANG_Mips_Assembler
:
9562 cu
->language
= language_asm
;
9565 cu
->language
= language_java
;
9569 cu
->language
= language_ada
;
9571 case DW_LANG_Modula2
:
9572 cu
->language
= language_m2
;
9574 case DW_LANG_Pascal83
:
9575 cu
->language
= language_pascal
;
9578 cu
->language
= language_objc
;
9580 case DW_LANG_Cobol74
:
9581 case DW_LANG_Cobol85
:
9583 cu
->language
= language_minimal
;
9586 cu
->language_defn
= language_def (cu
->language
);
9589 /* Return the named attribute or NULL if not there. */
9591 static struct attribute
*
9592 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9595 struct attribute
*spec
= NULL
;
9597 for (i
= 0; i
< die
->num_attrs
; ++i
)
9599 if (die
->attrs
[i
].name
== name
)
9600 return &die
->attrs
[i
];
9601 if (die
->attrs
[i
].name
== DW_AT_specification
9602 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9603 spec
= &die
->attrs
[i
];
9608 die
= follow_die_ref (die
, spec
, &cu
);
9609 return dwarf2_attr (die
, name
, cu
);
9615 /* Return the named attribute or NULL if not there,
9616 but do not follow DW_AT_specification, etc.
9617 This is for use in contexts where we're reading .debug_types dies.
9618 Following DW_AT_specification, DW_AT_abstract_origin will take us
9619 back up the chain, and we want to go down. */
9621 static struct attribute
*
9622 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9623 struct dwarf2_cu
*cu
)
9627 for (i
= 0; i
< die
->num_attrs
; ++i
)
9628 if (die
->attrs
[i
].name
== name
)
9629 return &die
->attrs
[i
];
9634 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9635 and holds a non-zero value. This function should only be used for
9636 DW_FORM_flag or DW_FORM_flag_present attributes. */
9639 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9641 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9643 return (attr
&& DW_UNSND (attr
));
9647 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9649 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9650 which value is non-zero. However, we have to be careful with
9651 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9652 (via dwarf2_flag_true_p) follows this attribute. So we may
9653 end up accidently finding a declaration attribute that belongs
9654 to a different DIE referenced by the specification attribute,
9655 even though the given DIE does not have a declaration attribute. */
9656 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9657 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9660 /* Return the die giving the specification for DIE, if there is
9661 one. *SPEC_CU is the CU containing DIE on input, and the CU
9662 containing the return value on output. If there is no
9663 specification, but there is an abstract origin, that is
9666 static struct die_info
*
9667 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9669 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9672 if (spec_attr
== NULL
)
9673 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9675 if (spec_attr
== NULL
)
9678 return follow_die_ref (die
, spec_attr
, spec_cu
);
9681 /* Free the line_header structure *LH, and any arrays and strings it
9684 free_line_header (struct line_header
*lh
)
9686 if (lh
->standard_opcode_lengths
)
9687 xfree (lh
->standard_opcode_lengths
);
9689 /* Remember that all the lh->file_names[i].name pointers are
9690 pointers into debug_line_buffer, and don't need to be freed. */
9692 xfree (lh
->file_names
);
9694 /* Similarly for the include directory names. */
9695 if (lh
->include_dirs
)
9696 xfree (lh
->include_dirs
);
9702 /* Add an entry to LH's include directory table. */
9704 add_include_dir (struct line_header
*lh
, char *include_dir
)
9706 /* Grow the array if necessary. */
9707 if (lh
->include_dirs_size
== 0)
9709 lh
->include_dirs_size
= 1; /* for testing */
9710 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9711 * sizeof (*lh
->include_dirs
));
9713 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9715 lh
->include_dirs_size
*= 2;
9716 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9717 (lh
->include_dirs_size
9718 * sizeof (*lh
->include_dirs
)));
9721 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
9725 /* Add an entry to LH's file name table. */
9727 add_file_name (struct line_header
*lh
,
9729 unsigned int dir_index
,
9730 unsigned int mod_time
,
9731 unsigned int length
)
9733 struct file_entry
*fe
;
9735 /* Grow the array if necessary. */
9736 if (lh
->file_names_size
== 0)
9738 lh
->file_names_size
= 1; /* for testing */
9739 lh
->file_names
= xmalloc (lh
->file_names_size
9740 * sizeof (*lh
->file_names
));
9742 else if (lh
->num_file_names
>= lh
->file_names_size
)
9744 lh
->file_names_size
*= 2;
9745 lh
->file_names
= xrealloc (lh
->file_names
,
9746 (lh
->file_names_size
9747 * sizeof (*lh
->file_names
)));
9750 fe
= &lh
->file_names
[lh
->num_file_names
++];
9752 fe
->dir_index
= dir_index
;
9753 fe
->mod_time
= mod_time
;
9754 fe
->length
= length
;
9760 /* Read the statement program header starting at OFFSET in
9761 .debug_line, according to the endianness of ABFD. Return a pointer
9762 to a struct line_header, allocated using xmalloc.
9764 NOTE: the strings in the include directory and file name tables of
9765 the returned object point into debug_line_buffer, and must not be
9767 static struct line_header
*
9768 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
9769 struct dwarf2_cu
*cu
)
9771 struct cleanup
*back_to
;
9772 struct line_header
*lh
;
9774 unsigned int bytes_read
, offset_size
;
9776 char *cur_dir
, *cur_file
;
9778 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
9779 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
9781 complaint (&symfile_complaints
, _("missing .debug_line section"));
9785 /* Make sure that at least there's room for the total_length field.
9786 That could be 12 bytes long, but we're just going to fudge that. */
9787 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
9789 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9793 lh
= xmalloc (sizeof (*lh
));
9794 memset (lh
, 0, sizeof (*lh
));
9795 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
9798 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
9800 /* Read in the header. */
9802 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
9803 &bytes_read
, &offset_size
);
9804 line_ptr
+= bytes_read
;
9805 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
9806 + dwarf2_per_objfile
->line
.size
))
9808 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9811 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
9812 lh
->version
= read_2_bytes (abfd
, line_ptr
);
9814 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
9815 line_ptr
+= offset_size
;
9816 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
9818 if (lh
->version
>= 4)
9820 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
9824 lh
->maximum_ops_per_instruction
= 1;
9826 if (lh
->maximum_ops_per_instruction
== 0)
9828 lh
->maximum_ops_per_instruction
= 1;
9829 complaint (&symfile_complaints
,
9830 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9833 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
9835 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
9837 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
9839 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
9841 lh
->standard_opcode_lengths
9842 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
9844 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
9845 for (i
= 1; i
< lh
->opcode_base
; ++i
)
9847 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
9851 /* Read directory table. */
9852 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9854 line_ptr
+= bytes_read
;
9855 add_include_dir (lh
, cur_dir
);
9857 line_ptr
+= bytes_read
;
9859 /* Read file name table. */
9860 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9862 unsigned int dir_index
, mod_time
, length
;
9864 line_ptr
+= bytes_read
;
9865 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9866 line_ptr
+= bytes_read
;
9867 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9868 line_ptr
+= bytes_read
;
9869 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9870 line_ptr
+= bytes_read
;
9872 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
9874 line_ptr
+= bytes_read
;
9875 lh
->statement_program_start
= line_ptr
;
9877 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
9878 + dwarf2_per_objfile
->line
.size
))
9879 complaint (&symfile_complaints
,
9880 _("line number info header doesn't fit in `.debug_line' section"));
9882 discard_cleanups (back_to
);
9886 /* This function exists to work around a bug in certain compilers
9887 (particularly GCC 2.95), in which the first line number marker of a
9888 function does not show up until after the prologue, right before
9889 the second line number marker. This function shifts ADDRESS down
9890 to the beginning of the function if necessary, and is called on
9891 addresses passed to record_line. */
9894 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
9896 struct function_range
*fn
;
9898 /* Find the function_range containing address. */
9903 cu
->cached_fn
= cu
->first_fn
;
9907 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9913 while (fn
&& fn
!= cu
->cached_fn
)
9914 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9924 if (address
!= fn
->lowpc
)
9925 complaint (&symfile_complaints
,
9926 _("misplaced first line number at 0x%lx for '%s'"),
9927 (unsigned long) address
, fn
->name
);
9932 /* Subroutine of dwarf_decode_lines to simplify it.
9933 Return the file name of the psymtab for included file FILE_INDEX
9934 in line header LH of PST.
9935 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9936 If space for the result is malloc'd, it will be freed by a cleanup.
9937 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9940 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
9941 const struct partial_symtab
*pst
,
9942 const char *comp_dir
)
9944 const struct file_entry fe
= lh
->file_names
[file_index
];
9945 char *include_name
= fe
.name
;
9946 char *include_name_to_compare
= include_name
;
9947 char *dir_name
= NULL
;
9952 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
9954 if (!IS_ABSOLUTE_PATH (include_name
)
9955 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
9957 /* Avoid creating a duplicate psymtab for PST.
9958 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9959 Before we do the comparison, however, we need to account
9960 for DIR_NAME and COMP_DIR.
9961 First prepend dir_name (if non-NULL). If we still don't
9962 have an absolute path prepend comp_dir (if non-NULL).
9963 However, the directory we record in the include-file's
9964 psymtab does not contain COMP_DIR (to match the
9965 corresponding symtab(s)).
9970 bash$ gcc -g ./hello.c
9971 include_name = "hello.c"
9973 DW_AT_comp_dir = comp_dir = "/tmp"
9974 DW_AT_name = "./hello.c" */
9976 if (dir_name
!= NULL
)
9978 include_name
= concat (dir_name
, SLASH_STRING
,
9979 include_name
, (char *)NULL
);
9980 include_name_to_compare
= include_name
;
9981 make_cleanup (xfree
, include_name
);
9983 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
9985 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
9986 include_name
, (char *)NULL
);
9990 pst_filename
= pst
->filename
;
9991 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
9993 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
9994 pst_filename
, (char *)NULL
);
9997 file_is_pst
= strcmp (include_name_to_compare
, pst_filename
) == 0;
9999 if (include_name_to_compare
!= include_name
)
10000 xfree (include_name_to_compare
);
10001 if (pst_filename
!= pst
->filename
)
10002 xfree (pst_filename
);
10006 return include_name
;
10009 /* Decode the Line Number Program (LNP) for the given line_header
10010 structure and CU. The actual information extracted and the type
10011 of structures created from the LNP depends on the value of PST.
10013 1. If PST is NULL, then this procedure uses the data from the program
10014 to create all necessary symbol tables, and their linetables.
10016 2. If PST is not NULL, this procedure reads the program to determine
10017 the list of files included by the unit represented by PST, and
10018 builds all the associated partial symbol tables.
10020 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10021 It is used for relative paths in the line table.
10022 NOTE: When processing partial symtabs (pst != NULL),
10023 comp_dir == pst->dirname.
10025 NOTE: It is important that psymtabs have the same file name (via strcmp)
10026 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10027 symtab we don't use it in the name of the psymtabs we create.
10028 E.g. expand_line_sal requires this when finding psymtabs to expand.
10029 A good testcase for this is mb-inline.exp. */
10032 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
10033 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10035 gdb_byte
*line_ptr
, *extended_end
;
10036 gdb_byte
*line_end
;
10037 unsigned int bytes_read
, extended_len
;
10038 unsigned char op_code
, extended_op
, adj_opcode
;
10039 CORE_ADDR baseaddr
;
10040 struct objfile
*objfile
= cu
->objfile
;
10041 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10042 const int decode_for_pst_p
= (pst
!= NULL
);
10043 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10045 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10047 line_ptr
= lh
->statement_program_start
;
10048 line_end
= lh
->statement_program_end
;
10050 /* Read the statement sequences until there's nothing left. */
10051 while (line_ptr
< line_end
)
10053 /* state machine registers */
10054 CORE_ADDR address
= 0;
10055 unsigned int file
= 1;
10056 unsigned int line
= 1;
10057 unsigned int column
= 0;
10058 int is_stmt
= lh
->default_is_stmt
;
10059 int basic_block
= 0;
10060 int end_sequence
= 0;
10062 unsigned char op_index
= 0;
10064 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10066 /* Start a subfile for the current file of the state machine. */
10067 /* lh->include_dirs and lh->file_names are 0-based, but the
10068 directory and file name numbers in the statement program
10070 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10074 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10076 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10079 /* Decode the table. */
10080 while (!end_sequence
)
10082 op_code
= read_1_byte (abfd
, line_ptr
);
10084 if (line_ptr
> line_end
)
10086 dwarf2_debug_line_missing_end_sequence_complaint ();
10090 if (op_code
>= lh
->opcode_base
)
10092 /* Special operand. */
10093 adj_opcode
= op_code
- lh
->opcode_base
;
10094 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10095 / lh
->maximum_ops_per_instruction
)
10096 * lh
->minimum_instruction_length
);
10097 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10098 % lh
->maximum_ops_per_instruction
);
10099 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10100 if (lh
->num_file_names
< file
|| file
== 0)
10101 dwarf2_debug_line_missing_file_complaint ();
10102 /* For now we ignore lines not starting on an
10103 instruction boundary. */
10104 else if (op_index
== 0)
10106 lh
->file_names
[file
- 1].included_p
= 1;
10107 if (!decode_for_pst_p
&& is_stmt
)
10109 if (last_subfile
!= current_subfile
)
10111 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10113 record_line (last_subfile
, 0, addr
);
10114 last_subfile
= current_subfile
;
10116 /* Append row to matrix using current values. */
10117 addr
= check_cu_functions (address
, cu
);
10118 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10119 record_line (current_subfile
, line
, addr
);
10124 else switch (op_code
)
10126 case DW_LNS_extended_op
:
10127 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10128 line_ptr
+= bytes_read
;
10129 extended_end
= line_ptr
+ extended_len
;
10130 extended_op
= read_1_byte (abfd
, line_ptr
);
10132 switch (extended_op
)
10134 case DW_LNE_end_sequence
:
10137 case DW_LNE_set_address
:
10138 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10140 line_ptr
+= bytes_read
;
10141 address
+= baseaddr
;
10143 case DW_LNE_define_file
:
10146 unsigned int dir_index
, mod_time
, length
;
10148 cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
);
10149 line_ptr
+= bytes_read
;
10151 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10152 line_ptr
+= bytes_read
;
10154 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10155 line_ptr
+= bytes_read
;
10157 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10158 line_ptr
+= bytes_read
;
10159 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10162 case DW_LNE_set_discriminator
:
10163 /* The discriminator is not interesting to the debugger;
10165 line_ptr
= extended_end
;
10168 complaint (&symfile_complaints
,
10169 _("mangled .debug_line section"));
10172 /* Make sure that we parsed the extended op correctly. If e.g.
10173 we expected a different address size than the producer used,
10174 we may have read the wrong number of bytes. */
10175 if (line_ptr
!= extended_end
)
10177 complaint (&symfile_complaints
,
10178 _("mangled .debug_line section"));
10183 if (lh
->num_file_names
< file
|| file
== 0)
10184 dwarf2_debug_line_missing_file_complaint ();
10187 lh
->file_names
[file
- 1].included_p
= 1;
10188 if (!decode_for_pst_p
&& is_stmt
)
10190 if (last_subfile
!= current_subfile
)
10192 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10194 record_line (last_subfile
, 0, addr
);
10195 last_subfile
= current_subfile
;
10197 addr
= check_cu_functions (address
, cu
);
10198 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10199 record_line (current_subfile
, line
, addr
);
10204 case DW_LNS_advance_pc
:
10207 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10209 address
+= (((op_index
+ adjust
)
10210 / lh
->maximum_ops_per_instruction
)
10211 * lh
->minimum_instruction_length
);
10212 op_index
= ((op_index
+ adjust
)
10213 % lh
->maximum_ops_per_instruction
);
10214 line_ptr
+= bytes_read
;
10217 case DW_LNS_advance_line
:
10218 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10219 line_ptr
+= bytes_read
;
10221 case DW_LNS_set_file
:
10223 /* The arrays lh->include_dirs and lh->file_names are
10224 0-based, but the directory and file name numbers in
10225 the statement program are 1-based. */
10226 struct file_entry
*fe
;
10229 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10230 line_ptr
+= bytes_read
;
10231 if (lh
->num_file_names
< file
|| file
== 0)
10232 dwarf2_debug_line_missing_file_complaint ();
10235 fe
= &lh
->file_names
[file
- 1];
10237 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10238 if (!decode_for_pst_p
)
10240 last_subfile
= current_subfile
;
10241 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10246 case DW_LNS_set_column
:
10247 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10248 line_ptr
+= bytes_read
;
10250 case DW_LNS_negate_stmt
:
10251 is_stmt
= (!is_stmt
);
10253 case DW_LNS_set_basic_block
:
10256 /* Add to the address register of the state machine the
10257 address increment value corresponding to special opcode
10258 255. I.e., this value is scaled by the minimum
10259 instruction length since special opcode 255 would have
10260 scaled the the increment. */
10261 case DW_LNS_const_add_pc
:
10263 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10265 address
+= (((op_index
+ adjust
)
10266 / lh
->maximum_ops_per_instruction
)
10267 * lh
->minimum_instruction_length
);
10268 op_index
= ((op_index
+ adjust
)
10269 % lh
->maximum_ops_per_instruction
);
10272 case DW_LNS_fixed_advance_pc
:
10273 address
+= read_2_bytes (abfd
, line_ptr
);
10279 /* Unknown standard opcode, ignore it. */
10282 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10284 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10285 line_ptr
+= bytes_read
;
10290 if (lh
->num_file_names
< file
|| file
== 0)
10291 dwarf2_debug_line_missing_file_complaint ();
10294 lh
->file_names
[file
- 1].included_p
= 1;
10295 if (!decode_for_pst_p
)
10297 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10298 record_line (current_subfile
, 0, addr
);
10303 if (decode_for_pst_p
)
10307 /* Now that we're done scanning the Line Header Program, we can
10308 create the psymtab of each included file. */
10309 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10310 if (lh
->file_names
[file_index
].included_p
== 1)
10312 char *include_name
=
10313 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10314 if (include_name
!= NULL
)
10315 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10320 /* Make sure a symtab is created for every file, even files
10321 which contain only variables (i.e. no code with associated
10325 struct file_entry
*fe
;
10327 for (i
= 0; i
< lh
->num_file_names
; i
++)
10331 fe
= &lh
->file_names
[i
];
10333 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10334 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10336 /* Skip the main file; we don't need it, and it must be
10337 allocated last, so that it will show up before the
10338 non-primary symtabs in the objfile's symtab list. */
10339 if (current_subfile
== first_subfile
)
10342 if (current_subfile
->symtab
== NULL
)
10343 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10345 fe
->symtab
= current_subfile
->symtab
;
10350 /* Start a subfile for DWARF. FILENAME is the name of the file and
10351 DIRNAME the name of the source directory which contains FILENAME
10352 or NULL if not known. COMP_DIR is the compilation directory for the
10353 linetable's compilation unit or NULL if not known.
10354 This routine tries to keep line numbers from identical absolute and
10355 relative file names in a common subfile.
10357 Using the `list' example from the GDB testsuite, which resides in
10358 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10359 of /srcdir/list0.c yields the following debugging information for list0.c:
10361 DW_AT_name: /srcdir/list0.c
10362 DW_AT_comp_dir: /compdir
10363 files.files[0].name: list0.h
10364 files.files[0].dir: /srcdir
10365 files.files[1].name: list0.c
10366 files.files[1].dir: /srcdir
10368 The line number information for list0.c has to end up in a single
10369 subfile, so that `break /srcdir/list0.c:1' works as expected.
10370 start_subfile will ensure that this happens provided that we pass the
10371 concatenation of files.files[1].dir and files.files[1].name as the
10375 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
10379 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10380 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10381 second argument to start_subfile. To be consistent, we do the
10382 same here. In order not to lose the line information directory,
10383 we concatenate it to the filename when it makes sense.
10384 Note that the Dwarf3 standard says (speaking of filenames in line
10385 information): ``The directory index is ignored for file names
10386 that represent full path names''. Thus ignoring dirname in the
10387 `else' branch below isn't an issue. */
10389 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10390 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10392 fullname
= filename
;
10394 start_subfile (fullname
, comp_dir
);
10396 if (fullname
!= filename
)
10401 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10402 struct dwarf2_cu
*cu
)
10404 struct objfile
*objfile
= cu
->objfile
;
10405 struct comp_unit_head
*cu_header
= &cu
->header
;
10407 /* NOTE drow/2003-01-30: There used to be a comment and some special
10408 code here to turn a symbol with DW_AT_external and a
10409 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10410 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10411 with some versions of binutils) where shared libraries could have
10412 relocations against symbols in their debug information - the
10413 minimal symbol would have the right address, but the debug info
10414 would not. It's no longer necessary, because we will explicitly
10415 apply relocations when we read in the debug information now. */
10417 /* A DW_AT_location attribute with no contents indicates that a
10418 variable has been optimized away. */
10419 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10421 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10425 /* Handle one degenerate form of location expression specially, to
10426 preserve GDB's previous behavior when section offsets are
10427 specified. If this is just a DW_OP_addr then mark this symbol
10430 if (attr_form_is_block (attr
)
10431 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10432 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10434 unsigned int dummy
;
10436 SYMBOL_VALUE_ADDRESS (sym
) =
10437 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10438 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10439 fixup_symbol_section (sym
, objfile
);
10440 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10441 SYMBOL_SECTION (sym
));
10445 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10446 expression evaluator, and use LOC_COMPUTED only when necessary
10447 (i.e. when the value of a register or memory location is
10448 referenced, or a thread-local block, etc.). Then again, it might
10449 not be worthwhile. I'm assuming that it isn't unless performance
10450 or memory numbers show me otherwise. */
10452 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10453 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10456 /* Given a pointer to a DWARF information entry, figure out if we need
10457 to make a symbol table entry for it, and if so, create a new entry
10458 and return a pointer to it.
10459 If TYPE is NULL, determine symbol type from the die, otherwise
10460 used the passed type.
10461 If SPACE is not NULL, use it to hold the new symbol. If it is
10462 NULL, allocate a new symbol on the objfile's obstack. */
10464 static struct symbol
*
10465 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10466 struct symbol
*space
)
10468 struct objfile
*objfile
= cu
->objfile
;
10469 struct symbol
*sym
= NULL
;
10471 struct attribute
*attr
= NULL
;
10472 struct attribute
*attr2
= NULL
;
10473 CORE_ADDR baseaddr
;
10474 struct pending
**list_to_add
= NULL
;
10476 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10478 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10480 name
= dwarf2_name (die
, cu
);
10483 const char *linkagename
;
10484 int suppress_add
= 0;
10489 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10490 OBJSTAT (objfile
, n_syms
++);
10492 /* Cache this symbol's name and the name's demangled form (if any). */
10493 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10494 linkagename
= dwarf2_physname (name
, die
, cu
);
10495 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10497 /* Fortran does not have mangling standard and the mangling does differ
10498 between gfortran, iFort etc. */
10499 if (cu
->language
== language_fortran
10500 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10501 symbol_set_demangled_name (&(sym
->ginfo
),
10502 (char *) dwarf2_full_name (name
, die
, cu
),
10505 /* Default assumptions.
10506 Use the passed type or decode it from the die. */
10507 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10508 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10510 SYMBOL_TYPE (sym
) = type
;
10512 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10513 attr
= dwarf2_attr (die
,
10514 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10518 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10521 attr
= dwarf2_attr (die
,
10522 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10526 int file_index
= DW_UNSND (attr
);
10528 if (cu
->line_header
== NULL
10529 || file_index
> cu
->line_header
->num_file_names
)
10530 complaint (&symfile_complaints
,
10531 _("file index out of range"));
10532 else if (file_index
> 0)
10534 struct file_entry
*fe
;
10536 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10537 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10544 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10547 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10549 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10550 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10551 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10552 add_symbol_to_list (sym
, cu
->list_in_scope
);
10554 case DW_TAG_subprogram
:
10555 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10557 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10558 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10559 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10560 || cu
->language
== language_ada
)
10562 /* Subprograms marked external are stored as a global symbol.
10563 Ada subprograms, whether marked external or not, are always
10564 stored as a global symbol, because we want to be able to
10565 access them globally. For instance, we want to be able
10566 to break on a nested subprogram without having to
10567 specify the context. */
10568 list_to_add
= &global_symbols
;
10572 list_to_add
= cu
->list_in_scope
;
10575 case DW_TAG_inlined_subroutine
:
10576 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10578 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10579 SYMBOL_INLINED (sym
) = 1;
10580 /* Do not add the symbol to any lists. It will be found via
10581 BLOCK_FUNCTION from the blockvector. */
10583 case DW_TAG_template_value_param
:
10585 /* Fall through. */
10586 case DW_TAG_variable
:
10587 case DW_TAG_member
:
10588 /* Compilation with minimal debug info may result in variables
10589 with missing type entries. Change the misleading `void' type
10590 to something sensible. */
10591 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10593 = objfile_type (objfile
)->nodebug_data_symbol
;
10595 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10596 /* In the case of DW_TAG_member, we should only be called for
10597 static const members. */
10598 if (die
->tag
== DW_TAG_member
)
10600 /* dwarf2_add_field uses die_is_declaration,
10601 so we do the same. */
10602 gdb_assert (die_is_declaration (die
, cu
));
10607 dwarf2_const_value (attr
, sym
, cu
);
10608 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10611 if (attr2
&& (DW_UNSND (attr2
) != 0))
10612 list_to_add
= &global_symbols
;
10614 list_to_add
= cu
->list_in_scope
;
10618 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10621 var_decode_location (attr
, sym
, cu
);
10622 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10623 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10624 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10625 && !dwarf2_per_objfile
->has_section_at_zero
)
10627 /* When a static variable is eliminated by the linker,
10628 the corresponding debug information is not stripped
10629 out, but the variable address is set to null;
10630 do not add such variables into symbol table. */
10632 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10634 /* Workaround gfortran PR debug/40040 - it uses
10635 DW_AT_location for variables in -fPIC libraries which may
10636 get overriden by other libraries/executable and get
10637 a different address. Resolve it by the minimal symbol
10638 which may come from inferior's executable using copy
10639 relocation. Make this workaround only for gfortran as for
10640 other compilers GDB cannot guess the minimal symbol
10641 Fortran mangling kind. */
10642 if (cu
->language
== language_fortran
&& die
->parent
10643 && die
->parent
->tag
== DW_TAG_module
10645 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10646 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10648 /* A variable with DW_AT_external is never static,
10649 but it may be block-scoped. */
10650 list_to_add
= (cu
->list_in_scope
== &file_symbols
10651 ? &global_symbols
: cu
->list_in_scope
);
10654 list_to_add
= cu
->list_in_scope
;
10658 /* We do not know the address of this symbol.
10659 If it is an external symbol and we have type information
10660 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10661 The address of the variable will then be determined from
10662 the minimal symbol table whenever the variable is
10664 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10665 if (attr2
&& (DW_UNSND (attr2
) != 0)
10666 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10668 /* A variable with DW_AT_external is never static, but it
10669 may be block-scoped. */
10670 list_to_add
= (cu
->list_in_scope
== &file_symbols
10671 ? &global_symbols
: cu
->list_in_scope
);
10673 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10675 else if (!die_is_declaration (die
, cu
))
10677 /* Use the default LOC_OPTIMIZED_OUT class. */
10678 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10680 list_to_add
= cu
->list_in_scope
;
10684 case DW_TAG_formal_parameter
:
10685 /* If we are inside a function, mark this as an argument. If
10686 not, we might be looking at an argument to an inlined function
10687 when we do not have enough information to show inlined frames;
10688 pretend it's a local variable in that case so that the user can
10690 if (context_stack_depth
> 0
10691 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10692 SYMBOL_IS_ARGUMENT (sym
) = 1;
10693 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10696 var_decode_location (attr
, sym
, cu
);
10698 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10701 dwarf2_const_value (attr
, sym
, cu
);
10703 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10704 if (attr
&& DW_UNSND (attr
))
10706 struct type
*ref_type
;
10708 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10709 SYMBOL_TYPE (sym
) = ref_type
;
10712 list_to_add
= cu
->list_in_scope
;
10714 case DW_TAG_unspecified_parameters
:
10715 /* From varargs functions; gdb doesn't seem to have any
10716 interest in this information, so just ignore it for now.
10719 case DW_TAG_template_type_param
:
10721 /* Fall through. */
10722 case DW_TAG_class_type
:
10723 case DW_TAG_interface_type
:
10724 case DW_TAG_structure_type
:
10725 case DW_TAG_union_type
:
10726 case DW_TAG_set_type
:
10727 case DW_TAG_enumeration_type
:
10728 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10729 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
10732 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10733 really ever be static objects: otherwise, if you try
10734 to, say, break of a class's method and you're in a file
10735 which doesn't mention that class, it won't work unless
10736 the check for all static symbols in lookup_symbol_aux
10737 saves you. See the OtherFileClass tests in
10738 gdb.c++/namespace.exp. */
10742 list_to_add
= (cu
->list_in_scope
== &file_symbols
10743 && (cu
->language
== language_cplus
10744 || cu
->language
== language_java
)
10745 ? &global_symbols
: cu
->list_in_scope
);
10747 /* The semantics of C++ state that "struct foo {
10748 ... }" also defines a typedef for "foo". A Java
10749 class declaration also defines a typedef for the
10751 if (cu
->language
== language_cplus
10752 || cu
->language
== language_java
10753 || cu
->language
== language_ada
)
10755 /* The symbol's name is already allocated along
10756 with this objfile, so we don't need to
10757 duplicate it for the type. */
10758 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
10759 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
10764 case DW_TAG_typedef
:
10765 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10766 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10767 list_to_add
= cu
->list_in_scope
;
10769 case DW_TAG_base_type
:
10770 case DW_TAG_subrange_type
:
10771 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10772 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10773 list_to_add
= cu
->list_in_scope
;
10775 case DW_TAG_enumerator
:
10776 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10779 dwarf2_const_value (attr
, sym
, cu
);
10782 /* NOTE: carlton/2003-11-10: See comment above in the
10783 DW_TAG_class_type, etc. block. */
10785 list_to_add
= (cu
->list_in_scope
== &file_symbols
10786 && (cu
->language
== language_cplus
10787 || cu
->language
== language_java
)
10788 ? &global_symbols
: cu
->list_in_scope
);
10791 case DW_TAG_namespace
:
10792 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10793 list_to_add
= &global_symbols
;
10796 /* Not a tag we recognize. Hopefully we aren't processing
10797 trash data, but since we must specifically ignore things
10798 we don't recognize, there is nothing else we should do at
10800 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
10801 dwarf_tag_name (die
->tag
));
10807 sym
->hash_next
= objfile
->template_symbols
;
10808 objfile
->template_symbols
= sym
;
10809 list_to_add
= NULL
;
10812 if (list_to_add
!= NULL
)
10813 add_symbol_to_list (sym
, list_to_add
);
10815 /* For the benefit of old versions of GCC, check for anonymous
10816 namespaces based on the demangled name. */
10817 if (!processing_has_namespace_info
10818 && cu
->language
== language_cplus
)
10819 cp_scan_for_anonymous_namespaces (sym
);
10824 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10826 static struct symbol
*
10827 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10829 return new_symbol_full (die
, type
, cu
, NULL
);
10832 /* Given an attr with a DW_FORM_dataN value in host byte order,
10833 zero-extend it as appropriate for the symbol's type. The DWARF
10834 standard (v4) is not entirely clear about the meaning of using
10835 DW_FORM_dataN for a constant with a signed type, where the type is
10836 wider than the data. The conclusion of a discussion on the DWARF
10837 list was that this is unspecified. We choose to always zero-extend
10838 because that is the interpretation long in use by GCC. */
10841 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
10842 const char *name
, struct obstack
*obstack
,
10843 struct dwarf2_cu
*cu
, long *value
, int bits
)
10845 struct objfile
*objfile
= cu
->objfile
;
10846 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
10847 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
10848 LONGEST l
= DW_UNSND (attr
);
10850 if (bits
< sizeof (*value
) * 8)
10852 l
&= ((LONGEST
) 1 << bits
) - 1;
10855 else if (bits
== sizeof (*value
) * 8)
10859 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
10860 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
10867 /* Read a constant value from an attribute. Either set *VALUE, or if
10868 the value does not fit in *VALUE, set *BYTES - either already
10869 allocated on the objfile obstack, or newly allocated on OBSTACK,
10870 or, set *BATON, if we translated the constant to a location
10874 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
10875 const char *name
, struct obstack
*obstack
,
10876 struct dwarf2_cu
*cu
,
10877 long *value
, gdb_byte
**bytes
,
10878 struct dwarf2_locexpr_baton
**baton
)
10880 struct objfile
*objfile
= cu
->objfile
;
10881 struct comp_unit_head
*cu_header
= &cu
->header
;
10882 struct dwarf_block
*blk
;
10883 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
10884 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
10890 switch (attr
->form
)
10896 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
10897 dwarf2_const_value_length_mismatch_complaint (name
,
10898 cu_header
->addr_size
,
10899 TYPE_LENGTH (type
));
10900 /* Symbols of this form are reasonably rare, so we just
10901 piggyback on the existing location code rather than writing
10902 a new implementation of symbol_computed_ops. */
10903 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
10904 sizeof (struct dwarf2_locexpr_baton
));
10905 (*baton
)->per_cu
= cu
->per_cu
;
10906 gdb_assert ((*baton
)->per_cu
);
10908 (*baton
)->size
= 2 + cu_header
->addr_size
;
10909 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
10910 (*baton
)->data
= data
;
10912 data
[0] = DW_OP_addr
;
10913 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
10914 byte_order
, DW_ADDR (attr
));
10915 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
10918 case DW_FORM_string
:
10920 /* DW_STRING is already allocated on the objfile obstack, point
10922 *bytes
= (gdb_byte
*) DW_STRING (attr
);
10924 case DW_FORM_block1
:
10925 case DW_FORM_block2
:
10926 case DW_FORM_block4
:
10927 case DW_FORM_block
:
10928 case DW_FORM_exprloc
:
10929 blk
= DW_BLOCK (attr
);
10930 if (TYPE_LENGTH (type
) != blk
->size
)
10931 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
10932 TYPE_LENGTH (type
));
10933 *bytes
= blk
->data
;
10936 /* The DW_AT_const_value attributes are supposed to carry the
10937 symbol's value "represented as it would be on the target
10938 architecture." By the time we get here, it's already been
10939 converted to host endianness, so we just need to sign- or
10940 zero-extend it as appropriate. */
10941 case DW_FORM_data1
:
10942 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 8);
10944 case DW_FORM_data2
:
10945 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 16);
10947 case DW_FORM_data4
:
10948 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 32);
10950 case DW_FORM_data8
:
10951 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 64);
10954 case DW_FORM_sdata
:
10955 *value
= DW_SND (attr
);
10958 case DW_FORM_udata
:
10959 *value
= DW_UNSND (attr
);
10963 complaint (&symfile_complaints
,
10964 _("unsupported const value attribute form: '%s'"),
10965 dwarf_form_name (attr
->form
));
10972 /* Copy constant value from an attribute to a symbol. */
10975 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
10976 struct dwarf2_cu
*cu
)
10978 struct objfile
*objfile
= cu
->objfile
;
10979 struct comp_unit_head
*cu_header
= &cu
->header
;
10982 struct dwarf2_locexpr_baton
*baton
;
10984 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
10985 SYMBOL_PRINT_NAME (sym
),
10986 &objfile
->objfile_obstack
, cu
,
10987 &value
, &bytes
, &baton
);
10991 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
10992 SYMBOL_LOCATION_BATON (sym
) = baton
;
10993 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10995 else if (bytes
!= NULL
)
10997 SYMBOL_VALUE_BYTES (sym
) = bytes
;
10998 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11002 SYMBOL_VALUE (sym
) = value
;
11003 SYMBOL_CLASS (sym
) = LOC_CONST
;
11007 /* Return the type of the die in question using its DW_AT_type attribute. */
11009 static struct type
*
11010 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11012 struct attribute
*type_attr
;
11014 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11017 /* A missing DW_AT_type represents a void type. */
11018 return objfile_type (cu
->objfile
)->builtin_void
;
11021 return lookup_die_type (die
, type_attr
, cu
);
11024 /* True iff CU's producer generates GNAT Ada auxiliary information
11025 that allows to find parallel types through that information instead
11026 of having to do expensive parallel lookups by type name. */
11029 need_gnat_info (struct dwarf2_cu
*cu
)
11031 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11032 of GNAT produces this auxiliary information, without any indication
11033 that it is produced. Part of enhancing the FSF version of GNAT
11034 to produce that information will be to put in place an indicator
11035 that we can use in order to determine whether the descriptive type
11036 info is available or not. One suggestion that has been made is
11037 to use a new attribute, attached to the CU die. For now, assume
11038 that the descriptive type info is not available. */
11042 /* Return the auxiliary type of the die in question using its
11043 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11044 attribute is not present. */
11046 static struct type
*
11047 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11049 struct attribute
*type_attr
;
11051 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11055 return lookup_die_type (die
, type_attr
, cu
);
11058 /* If DIE has a descriptive_type attribute, then set the TYPE's
11059 descriptive type accordingly. */
11062 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11063 struct dwarf2_cu
*cu
)
11065 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11067 if (descriptive_type
)
11069 ALLOCATE_GNAT_AUX_TYPE (type
);
11070 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11074 /* Return the containing type of the die in question using its
11075 DW_AT_containing_type attribute. */
11077 static struct type
*
11078 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11080 struct attribute
*type_attr
;
11082 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11084 error (_("Dwarf Error: Problem turning containing type into gdb type "
11085 "[in module %s]"), cu
->objfile
->name
);
11087 return lookup_die_type (die
, type_attr
, cu
);
11090 /* Look up the type of DIE in CU using its type attribute ATTR.
11091 If there is no type substitute an error marker. */
11093 static struct type
*
11094 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11095 struct dwarf2_cu
*cu
)
11097 struct type
*this_type
;
11099 /* First see if we have it cached. */
11101 if (is_ref_attr (attr
))
11103 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11105 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11107 else if (attr
->form
== DW_FORM_sig8
)
11109 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11110 struct dwarf2_cu
*sig_cu
;
11111 unsigned int offset
;
11113 /* sig_type will be NULL if the signatured type is missing from
11115 if (sig_type
== NULL
)
11116 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11117 "at 0x%x [in module %s]"),
11118 die
->offset
, cu
->objfile
->name
);
11120 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11121 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11122 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11126 dump_die_for_error (die
);
11127 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11128 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11131 /* If not cached we need to read it in. */
11133 if (this_type
== NULL
)
11135 struct die_info
*type_die
;
11136 struct dwarf2_cu
*type_cu
= cu
;
11138 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11139 /* If the type is cached, we should have found it above. */
11140 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11141 this_type
= read_type_die_1 (type_die
, type_cu
);
11144 /* If we still don't have a type use an error marker. */
11146 if (this_type
== NULL
)
11148 char *message
, *saved
;
11150 /* read_type_die already issued a complaint. */
11151 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11155 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11156 message
, strlen (message
));
11159 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11165 /* Return the type in DIE, CU.
11166 Returns NULL for invalid types.
11168 This first does a lookup in the appropriate type_hash table,
11169 and only reads the die in if necessary.
11171 NOTE: This can be called when reading in partial or full symbols. */
11173 static struct type
*
11174 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11176 struct type
*this_type
;
11178 this_type
= get_die_type (die
, cu
);
11182 return read_type_die_1 (die
, cu
);
11185 /* Read the type in DIE, CU.
11186 Returns NULL for invalid types. */
11188 static struct type
*
11189 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11191 struct type
*this_type
= NULL
;
11195 case DW_TAG_class_type
:
11196 case DW_TAG_interface_type
:
11197 case DW_TAG_structure_type
:
11198 case DW_TAG_union_type
:
11199 this_type
= read_structure_type (die
, cu
);
11201 case DW_TAG_enumeration_type
:
11202 this_type
= read_enumeration_type (die
, cu
);
11204 case DW_TAG_subprogram
:
11205 case DW_TAG_subroutine_type
:
11206 case DW_TAG_inlined_subroutine
:
11207 this_type
= read_subroutine_type (die
, cu
);
11209 case DW_TAG_array_type
:
11210 this_type
= read_array_type (die
, cu
);
11212 case DW_TAG_set_type
:
11213 this_type
= read_set_type (die
, cu
);
11215 case DW_TAG_pointer_type
:
11216 this_type
= read_tag_pointer_type (die
, cu
);
11218 case DW_TAG_ptr_to_member_type
:
11219 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11221 case DW_TAG_reference_type
:
11222 this_type
= read_tag_reference_type (die
, cu
);
11224 case DW_TAG_const_type
:
11225 this_type
= read_tag_const_type (die
, cu
);
11227 case DW_TAG_volatile_type
:
11228 this_type
= read_tag_volatile_type (die
, cu
);
11230 case DW_TAG_string_type
:
11231 this_type
= read_tag_string_type (die
, cu
);
11233 case DW_TAG_typedef
:
11234 this_type
= read_typedef (die
, cu
);
11236 case DW_TAG_subrange_type
:
11237 this_type
= read_subrange_type (die
, cu
);
11239 case DW_TAG_base_type
:
11240 this_type
= read_base_type (die
, cu
);
11242 case DW_TAG_unspecified_type
:
11243 this_type
= read_unspecified_type (die
, cu
);
11245 case DW_TAG_namespace
:
11246 this_type
= read_namespace_type (die
, cu
);
11248 case DW_TAG_module
:
11249 this_type
= read_module_type (die
, cu
);
11252 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
11253 dwarf_tag_name (die
->tag
));
11260 /* Return the name of the namespace/class that DIE is defined within,
11261 or "" if we can't tell. The caller should not xfree the result.
11263 For example, if we're within the method foo() in the following
11273 then determine_prefix on foo's die will return "N::C". */
11276 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11278 struct die_info
*parent
, *spec_die
;
11279 struct dwarf2_cu
*spec_cu
;
11280 struct type
*parent_type
;
11282 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11283 && cu
->language
!= language_fortran
)
11286 /* We have to be careful in the presence of DW_AT_specification.
11287 For example, with GCC 3.4, given the code
11291 // Definition of N::foo.
11295 then we'll have a tree of DIEs like this:
11297 1: DW_TAG_compile_unit
11298 2: DW_TAG_namespace // N
11299 3: DW_TAG_subprogram // declaration of N::foo
11300 4: DW_TAG_subprogram // definition of N::foo
11301 DW_AT_specification // refers to die #3
11303 Thus, when processing die #4, we have to pretend that we're in
11304 the context of its DW_AT_specification, namely the contex of die
11307 spec_die
= die_specification (die
, &spec_cu
);
11308 if (spec_die
== NULL
)
11309 parent
= die
->parent
;
11312 parent
= spec_die
->parent
;
11316 if (parent
== NULL
)
11318 else if (parent
->building_fullname
)
11321 const char *parent_name
;
11323 /* It has been seen on RealView 2.2 built binaries,
11324 DW_TAG_template_type_param types actually _defined_ as
11325 children of the parent class:
11328 template class <class Enum> Class{};
11329 Class<enum E> class_e;
11331 1: DW_TAG_class_type (Class)
11332 2: DW_TAG_enumeration_type (E)
11333 3: DW_TAG_enumerator (enum1:0)
11334 3: DW_TAG_enumerator (enum2:1)
11336 2: DW_TAG_template_type_param
11337 DW_AT_type DW_FORM_ref_udata (E)
11339 Besides being broken debug info, it can put GDB into an
11340 infinite loop. Consider:
11342 When we're building the full name for Class<E>, we'll start
11343 at Class, and go look over its template type parameters,
11344 finding E. We'll then try to build the full name of E, and
11345 reach here. We're now trying to build the full name of E,
11346 and look over the parent DIE for containing scope. In the
11347 broken case, if we followed the parent DIE of E, we'd again
11348 find Class, and once again go look at its template type
11349 arguments, etc., etc. Simply don't consider such parent die
11350 as source-level parent of this die (it can't be, the language
11351 doesn't allow it), and break the loop here. */
11352 name
= dwarf2_name (die
, cu
);
11353 parent_name
= dwarf2_name (parent
, cu
);
11354 complaint (&symfile_complaints
,
11355 _("template param type '%s' defined within parent '%s'"),
11356 name
? name
: "<unknown>",
11357 parent_name
? parent_name
: "<unknown>");
11361 switch (parent
->tag
)
11363 case DW_TAG_namespace
:
11364 parent_type
= read_type_die (parent
, cu
);
11365 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11366 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11367 Work around this problem here. */
11368 if (cu
->language
== language_cplus
11369 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11371 /* We give a name to even anonymous namespaces. */
11372 return TYPE_TAG_NAME (parent_type
);
11373 case DW_TAG_class_type
:
11374 case DW_TAG_interface_type
:
11375 case DW_TAG_structure_type
:
11376 case DW_TAG_union_type
:
11377 case DW_TAG_module
:
11378 parent_type
= read_type_die (parent
, cu
);
11379 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11380 return TYPE_TAG_NAME (parent_type
);
11382 /* An anonymous structure is only allowed non-static data
11383 members; no typedefs, no member functions, et cetera.
11384 So it does not need a prefix. */
11387 return determine_prefix (parent
, cu
);
11391 /* Return a newly-allocated string formed by concatenating PREFIX and
11392 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11393 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11394 perform an obconcat, otherwise allocate storage for the result. The CU argument
11395 is used to determine the language and hence, the appropriate separator. */
11397 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11400 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11401 int physname
, struct dwarf2_cu
*cu
)
11403 const char *lead
= "";
11406 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
11408 else if (cu
->language
== language_java
)
11410 else if (cu
->language
== language_fortran
&& physname
)
11412 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11413 DW_AT_MIPS_linkage_name is preferred and used instead. */
11421 if (prefix
== NULL
)
11423 if (suffix
== NULL
)
11428 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11430 strcpy (retval
, lead
);
11431 strcat (retval
, prefix
);
11432 strcat (retval
, sep
);
11433 strcat (retval
, suffix
);
11438 /* We have an obstack. */
11439 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11443 /* Return sibling of die, NULL if no sibling. */
11445 static struct die_info
*
11446 sibling_die (struct die_info
*die
)
11448 return die
->sibling
;
11451 /* Get name of a die, return NULL if not found. */
11454 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11455 struct obstack
*obstack
)
11457 if (name
&& cu
->language
== language_cplus
)
11459 char *canon_name
= cp_canonicalize_string (name
);
11461 if (canon_name
!= NULL
)
11463 if (strcmp (canon_name
, name
) != 0)
11464 name
= obsavestring (canon_name
, strlen (canon_name
),
11466 xfree (canon_name
);
11473 /* Get name of a die, return NULL if not found. */
11476 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11478 struct attribute
*attr
;
11480 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11481 if (!attr
|| !DW_STRING (attr
))
11486 case DW_TAG_compile_unit
:
11487 /* Compilation units have a DW_AT_name that is a filename, not
11488 a source language identifier. */
11489 case DW_TAG_enumeration_type
:
11490 case DW_TAG_enumerator
:
11491 /* These tags always have simple identifiers already; no need
11492 to canonicalize them. */
11493 return DW_STRING (attr
);
11495 case DW_TAG_subprogram
:
11496 /* Java constructors will all be named "<init>", so return
11497 the class name when we see this special case. */
11498 if (cu
->language
== language_java
11499 && DW_STRING (attr
) != NULL
11500 && strcmp (DW_STRING (attr
), "<init>") == 0)
11502 struct dwarf2_cu
*spec_cu
= cu
;
11503 struct die_info
*spec_die
;
11505 /* GCJ will output '<init>' for Java constructor names.
11506 For this special case, return the name of the parent class. */
11508 /* GCJ may output suprogram DIEs with AT_specification set.
11509 If so, use the name of the specified DIE. */
11510 spec_die
= die_specification (die
, &spec_cu
);
11511 if (spec_die
!= NULL
)
11512 return dwarf2_name (spec_die
, spec_cu
);
11517 if (die
->tag
== DW_TAG_class_type
)
11518 return dwarf2_name (die
, cu
);
11520 while (die
->tag
!= DW_TAG_compile_unit
);
11524 case DW_TAG_class_type
:
11525 case DW_TAG_interface_type
:
11526 case DW_TAG_structure_type
:
11527 case DW_TAG_union_type
:
11528 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11529 structures or unions. These were of the form "._%d" in GCC 4.1,
11530 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11531 and GCC 4.4. We work around this problem by ignoring these. */
11532 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11533 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11541 if (!DW_STRING_IS_CANONICAL (attr
))
11544 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11545 &cu
->objfile
->objfile_obstack
);
11546 DW_STRING_IS_CANONICAL (attr
) = 1;
11548 return DW_STRING (attr
);
11551 /* Return the die that this die in an extension of, or NULL if there
11552 is none. *EXT_CU is the CU containing DIE on input, and the CU
11553 containing the return value on output. */
11555 static struct die_info
*
11556 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11558 struct attribute
*attr
;
11560 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11564 return follow_die_ref (die
, attr
, ext_cu
);
11567 /* Convert a DIE tag into its string name. */
11570 dwarf_tag_name (unsigned tag
)
11574 case DW_TAG_padding
:
11575 return "DW_TAG_padding";
11576 case DW_TAG_array_type
:
11577 return "DW_TAG_array_type";
11578 case DW_TAG_class_type
:
11579 return "DW_TAG_class_type";
11580 case DW_TAG_entry_point
:
11581 return "DW_TAG_entry_point";
11582 case DW_TAG_enumeration_type
:
11583 return "DW_TAG_enumeration_type";
11584 case DW_TAG_formal_parameter
:
11585 return "DW_TAG_formal_parameter";
11586 case DW_TAG_imported_declaration
:
11587 return "DW_TAG_imported_declaration";
11589 return "DW_TAG_label";
11590 case DW_TAG_lexical_block
:
11591 return "DW_TAG_lexical_block";
11592 case DW_TAG_member
:
11593 return "DW_TAG_member";
11594 case DW_TAG_pointer_type
:
11595 return "DW_TAG_pointer_type";
11596 case DW_TAG_reference_type
:
11597 return "DW_TAG_reference_type";
11598 case DW_TAG_compile_unit
:
11599 return "DW_TAG_compile_unit";
11600 case DW_TAG_string_type
:
11601 return "DW_TAG_string_type";
11602 case DW_TAG_structure_type
:
11603 return "DW_TAG_structure_type";
11604 case DW_TAG_subroutine_type
:
11605 return "DW_TAG_subroutine_type";
11606 case DW_TAG_typedef
:
11607 return "DW_TAG_typedef";
11608 case DW_TAG_union_type
:
11609 return "DW_TAG_union_type";
11610 case DW_TAG_unspecified_parameters
:
11611 return "DW_TAG_unspecified_parameters";
11612 case DW_TAG_variant
:
11613 return "DW_TAG_variant";
11614 case DW_TAG_common_block
:
11615 return "DW_TAG_common_block";
11616 case DW_TAG_common_inclusion
:
11617 return "DW_TAG_common_inclusion";
11618 case DW_TAG_inheritance
:
11619 return "DW_TAG_inheritance";
11620 case DW_TAG_inlined_subroutine
:
11621 return "DW_TAG_inlined_subroutine";
11622 case DW_TAG_module
:
11623 return "DW_TAG_module";
11624 case DW_TAG_ptr_to_member_type
:
11625 return "DW_TAG_ptr_to_member_type";
11626 case DW_TAG_set_type
:
11627 return "DW_TAG_set_type";
11628 case DW_TAG_subrange_type
:
11629 return "DW_TAG_subrange_type";
11630 case DW_TAG_with_stmt
:
11631 return "DW_TAG_with_stmt";
11632 case DW_TAG_access_declaration
:
11633 return "DW_TAG_access_declaration";
11634 case DW_TAG_base_type
:
11635 return "DW_TAG_base_type";
11636 case DW_TAG_catch_block
:
11637 return "DW_TAG_catch_block";
11638 case DW_TAG_const_type
:
11639 return "DW_TAG_const_type";
11640 case DW_TAG_constant
:
11641 return "DW_TAG_constant";
11642 case DW_TAG_enumerator
:
11643 return "DW_TAG_enumerator";
11644 case DW_TAG_file_type
:
11645 return "DW_TAG_file_type";
11646 case DW_TAG_friend
:
11647 return "DW_TAG_friend";
11648 case DW_TAG_namelist
:
11649 return "DW_TAG_namelist";
11650 case DW_TAG_namelist_item
:
11651 return "DW_TAG_namelist_item";
11652 case DW_TAG_packed_type
:
11653 return "DW_TAG_packed_type";
11654 case DW_TAG_subprogram
:
11655 return "DW_TAG_subprogram";
11656 case DW_TAG_template_type_param
:
11657 return "DW_TAG_template_type_param";
11658 case DW_TAG_template_value_param
:
11659 return "DW_TAG_template_value_param";
11660 case DW_TAG_thrown_type
:
11661 return "DW_TAG_thrown_type";
11662 case DW_TAG_try_block
:
11663 return "DW_TAG_try_block";
11664 case DW_TAG_variant_part
:
11665 return "DW_TAG_variant_part";
11666 case DW_TAG_variable
:
11667 return "DW_TAG_variable";
11668 case DW_TAG_volatile_type
:
11669 return "DW_TAG_volatile_type";
11670 case DW_TAG_dwarf_procedure
:
11671 return "DW_TAG_dwarf_procedure";
11672 case DW_TAG_restrict_type
:
11673 return "DW_TAG_restrict_type";
11674 case DW_TAG_interface_type
:
11675 return "DW_TAG_interface_type";
11676 case DW_TAG_namespace
:
11677 return "DW_TAG_namespace";
11678 case DW_TAG_imported_module
:
11679 return "DW_TAG_imported_module";
11680 case DW_TAG_unspecified_type
:
11681 return "DW_TAG_unspecified_type";
11682 case DW_TAG_partial_unit
:
11683 return "DW_TAG_partial_unit";
11684 case DW_TAG_imported_unit
:
11685 return "DW_TAG_imported_unit";
11686 case DW_TAG_condition
:
11687 return "DW_TAG_condition";
11688 case DW_TAG_shared_type
:
11689 return "DW_TAG_shared_type";
11690 case DW_TAG_type_unit
:
11691 return "DW_TAG_type_unit";
11692 case DW_TAG_MIPS_loop
:
11693 return "DW_TAG_MIPS_loop";
11694 case DW_TAG_HP_array_descriptor
:
11695 return "DW_TAG_HP_array_descriptor";
11696 case DW_TAG_format_label
:
11697 return "DW_TAG_format_label";
11698 case DW_TAG_function_template
:
11699 return "DW_TAG_function_template";
11700 case DW_TAG_class_template
:
11701 return "DW_TAG_class_template";
11702 case DW_TAG_GNU_BINCL
:
11703 return "DW_TAG_GNU_BINCL";
11704 case DW_TAG_GNU_EINCL
:
11705 return "DW_TAG_GNU_EINCL";
11706 case DW_TAG_upc_shared_type
:
11707 return "DW_TAG_upc_shared_type";
11708 case DW_TAG_upc_strict_type
:
11709 return "DW_TAG_upc_strict_type";
11710 case DW_TAG_upc_relaxed_type
:
11711 return "DW_TAG_upc_relaxed_type";
11712 case DW_TAG_PGI_kanji_type
:
11713 return "DW_TAG_PGI_kanji_type";
11714 case DW_TAG_PGI_interface_block
:
11715 return "DW_TAG_PGI_interface_block";
11717 return "DW_TAG_<unknown>";
11721 /* Convert a DWARF attribute code into its string name. */
11724 dwarf_attr_name (unsigned attr
)
11728 case DW_AT_sibling
:
11729 return "DW_AT_sibling";
11730 case DW_AT_location
:
11731 return "DW_AT_location";
11733 return "DW_AT_name";
11734 case DW_AT_ordering
:
11735 return "DW_AT_ordering";
11736 case DW_AT_subscr_data
:
11737 return "DW_AT_subscr_data";
11738 case DW_AT_byte_size
:
11739 return "DW_AT_byte_size";
11740 case DW_AT_bit_offset
:
11741 return "DW_AT_bit_offset";
11742 case DW_AT_bit_size
:
11743 return "DW_AT_bit_size";
11744 case DW_AT_element_list
:
11745 return "DW_AT_element_list";
11746 case DW_AT_stmt_list
:
11747 return "DW_AT_stmt_list";
11749 return "DW_AT_low_pc";
11750 case DW_AT_high_pc
:
11751 return "DW_AT_high_pc";
11752 case DW_AT_language
:
11753 return "DW_AT_language";
11755 return "DW_AT_member";
11757 return "DW_AT_discr";
11758 case DW_AT_discr_value
:
11759 return "DW_AT_discr_value";
11760 case DW_AT_visibility
:
11761 return "DW_AT_visibility";
11763 return "DW_AT_import";
11764 case DW_AT_string_length
:
11765 return "DW_AT_string_length";
11766 case DW_AT_common_reference
:
11767 return "DW_AT_common_reference";
11768 case DW_AT_comp_dir
:
11769 return "DW_AT_comp_dir";
11770 case DW_AT_const_value
:
11771 return "DW_AT_const_value";
11772 case DW_AT_containing_type
:
11773 return "DW_AT_containing_type";
11774 case DW_AT_default_value
:
11775 return "DW_AT_default_value";
11777 return "DW_AT_inline";
11778 case DW_AT_is_optional
:
11779 return "DW_AT_is_optional";
11780 case DW_AT_lower_bound
:
11781 return "DW_AT_lower_bound";
11782 case DW_AT_producer
:
11783 return "DW_AT_producer";
11784 case DW_AT_prototyped
:
11785 return "DW_AT_prototyped";
11786 case DW_AT_return_addr
:
11787 return "DW_AT_return_addr";
11788 case DW_AT_start_scope
:
11789 return "DW_AT_start_scope";
11790 case DW_AT_bit_stride
:
11791 return "DW_AT_bit_stride";
11792 case DW_AT_upper_bound
:
11793 return "DW_AT_upper_bound";
11794 case DW_AT_abstract_origin
:
11795 return "DW_AT_abstract_origin";
11796 case DW_AT_accessibility
:
11797 return "DW_AT_accessibility";
11798 case DW_AT_address_class
:
11799 return "DW_AT_address_class";
11800 case DW_AT_artificial
:
11801 return "DW_AT_artificial";
11802 case DW_AT_base_types
:
11803 return "DW_AT_base_types";
11804 case DW_AT_calling_convention
:
11805 return "DW_AT_calling_convention";
11807 return "DW_AT_count";
11808 case DW_AT_data_member_location
:
11809 return "DW_AT_data_member_location";
11810 case DW_AT_decl_column
:
11811 return "DW_AT_decl_column";
11812 case DW_AT_decl_file
:
11813 return "DW_AT_decl_file";
11814 case DW_AT_decl_line
:
11815 return "DW_AT_decl_line";
11816 case DW_AT_declaration
:
11817 return "DW_AT_declaration";
11818 case DW_AT_discr_list
:
11819 return "DW_AT_discr_list";
11820 case DW_AT_encoding
:
11821 return "DW_AT_encoding";
11822 case DW_AT_external
:
11823 return "DW_AT_external";
11824 case DW_AT_frame_base
:
11825 return "DW_AT_frame_base";
11827 return "DW_AT_friend";
11828 case DW_AT_identifier_case
:
11829 return "DW_AT_identifier_case";
11830 case DW_AT_macro_info
:
11831 return "DW_AT_macro_info";
11832 case DW_AT_namelist_items
:
11833 return "DW_AT_namelist_items";
11834 case DW_AT_priority
:
11835 return "DW_AT_priority";
11836 case DW_AT_segment
:
11837 return "DW_AT_segment";
11838 case DW_AT_specification
:
11839 return "DW_AT_specification";
11840 case DW_AT_static_link
:
11841 return "DW_AT_static_link";
11843 return "DW_AT_type";
11844 case DW_AT_use_location
:
11845 return "DW_AT_use_location";
11846 case DW_AT_variable_parameter
:
11847 return "DW_AT_variable_parameter";
11848 case DW_AT_virtuality
:
11849 return "DW_AT_virtuality";
11850 case DW_AT_vtable_elem_location
:
11851 return "DW_AT_vtable_elem_location";
11852 /* DWARF 3 values. */
11853 case DW_AT_allocated
:
11854 return "DW_AT_allocated";
11855 case DW_AT_associated
:
11856 return "DW_AT_associated";
11857 case DW_AT_data_location
:
11858 return "DW_AT_data_location";
11859 case DW_AT_byte_stride
:
11860 return "DW_AT_byte_stride";
11861 case DW_AT_entry_pc
:
11862 return "DW_AT_entry_pc";
11863 case DW_AT_use_UTF8
:
11864 return "DW_AT_use_UTF8";
11865 case DW_AT_extension
:
11866 return "DW_AT_extension";
11868 return "DW_AT_ranges";
11869 case DW_AT_trampoline
:
11870 return "DW_AT_trampoline";
11871 case DW_AT_call_column
:
11872 return "DW_AT_call_column";
11873 case DW_AT_call_file
:
11874 return "DW_AT_call_file";
11875 case DW_AT_call_line
:
11876 return "DW_AT_call_line";
11877 case DW_AT_description
:
11878 return "DW_AT_description";
11879 case DW_AT_binary_scale
:
11880 return "DW_AT_binary_scale";
11881 case DW_AT_decimal_scale
:
11882 return "DW_AT_decimal_scale";
11884 return "DW_AT_small";
11885 case DW_AT_decimal_sign
:
11886 return "DW_AT_decimal_sign";
11887 case DW_AT_digit_count
:
11888 return "DW_AT_digit_count";
11889 case DW_AT_picture_string
:
11890 return "DW_AT_picture_string";
11891 case DW_AT_mutable
:
11892 return "DW_AT_mutable";
11893 case DW_AT_threads_scaled
:
11894 return "DW_AT_threads_scaled";
11895 case DW_AT_explicit
:
11896 return "DW_AT_explicit";
11897 case DW_AT_object_pointer
:
11898 return "DW_AT_object_pointer";
11899 case DW_AT_endianity
:
11900 return "DW_AT_endianity";
11901 case DW_AT_elemental
:
11902 return "DW_AT_elemental";
11904 return "DW_AT_pure";
11905 case DW_AT_recursive
:
11906 return "DW_AT_recursive";
11907 /* DWARF 4 values. */
11908 case DW_AT_signature
:
11909 return "DW_AT_signature";
11910 case DW_AT_linkage_name
:
11911 return "DW_AT_linkage_name";
11912 /* SGI/MIPS extensions. */
11913 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11914 case DW_AT_MIPS_fde
:
11915 return "DW_AT_MIPS_fde";
11917 case DW_AT_MIPS_loop_begin
:
11918 return "DW_AT_MIPS_loop_begin";
11919 case DW_AT_MIPS_tail_loop_begin
:
11920 return "DW_AT_MIPS_tail_loop_begin";
11921 case DW_AT_MIPS_epilog_begin
:
11922 return "DW_AT_MIPS_epilog_begin";
11923 case DW_AT_MIPS_loop_unroll_factor
:
11924 return "DW_AT_MIPS_loop_unroll_factor";
11925 case DW_AT_MIPS_software_pipeline_depth
:
11926 return "DW_AT_MIPS_software_pipeline_depth";
11927 case DW_AT_MIPS_linkage_name
:
11928 return "DW_AT_MIPS_linkage_name";
11929 case DW_AT_MIPS_stride
:
11930 return "DW_AT_MIPS_stride";
11931 case DW_AT_MIPS_abstract_name
:
11932 return "DW_AT_MIPS_abstract_name";
11933 case DW_AT_MIPS_clone_origin
:
11934 return "DW_AT_MIPS_clone_origin";
11935 case DW_AT_MIPS_has_inlines
:
11936 return "DW_AT_MIPS_has_inlines";
11937 /* HP extensions. */
11938 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11939 case DW_AT_HP_block_index
:
11940 return "DW_AT_HP_block_index";
11942 case DW_AT_HP_unmodifiable
:
11943 return "DW_AT_HP_unmodifiable";
11944 case DW_AT_HP_actuals_stmt_list
:
11945 return "DW_AT_HP_actuals_stmt_list";
11946 case DW_AT_HP_proc_per_section
:
11947 return "DW_AT_HP_proc_per_section";
11948 case DW_AT_HP_raw_data_ptr
:
11949 return "DW_AT_HP_raw_data_ptr";
11950 case DW_AT_HP_pass_by_reference
:
11951 return "DW_AT_HP_pass_by_reference";
11952 case DW_AT_HP_opt_level
:
11953 return "DW_AT_HP_opt_level";
11954 case DW_AT_HP_prof_version_id
:
11955 return "DW_AT_HP_prof_version_id";
11956 case DW_AT_HP_opt_flags
:
11957 return "DW_AT_HP_opt_flags";
11958 case DW_AT_HP_cold_region_low_pc
:
11959 return "DW_AT_HP_cold_region_low_pc";
11960 case DW_AT_HP_cold_region_high_pc
:
11961 return "DW_AT_HP_cold_region_high_pc";
11962 case DW_AT_HP_all_variables_modifiable
:
11963 return "DW_AT_HP_all_variables_modifiable";
11964 case DW_AT_HP_linkage_name
:
11965 return "DW_AT_HP_linkage_name";
11966 case DW_AT_HP_prof_flags
:
11967 return "DW_AT_HP_prof_flags";
11968 /* GNU extensions. */
11969 case DW_AT_sf_names
:
11970 return "DW_AT_sf_names";
11971 case DW_AT_src_info
:
11972 return "DW_AT_src_info";
11973 case DW_AT_mac_info
:
11974 return "DW_AT_mac_info";
11975 case DW_AT_src_coords
:
11976 return "DW_AT_src_coords";
11977 case DW_AT_body_begin
:
11978 return "DW_AT_body_begin";
11979 case DW_AT_body_end
:
11980 return "DW_AT_body_end";
11981 case DW_AT_GNU_vector
:
11982 return "DW_AT_GNU_vector";
11983 case DW_AT_GNU_odr_signature
:
11984 return "DW_AT_GNU_odr_signature";
11985 /* VMS extensions. */
11986 case DW_AT_VMS_rtnbeg_pd_address
:
11987 return "DW_AT_VMS_rtnbeg_pd_address";
11988 /* UPC extension. */
11989 case DW_AT_upc_threads_scaled
:
11990 return "DW_AT_upc_threads_scaled";
11991 /* PGI (STMicroelectronics) extensions. */
11992 case DW_AT_PGI_lbase
:
11993 return "DW_AT_PGI_lbase";
11994 case DW_AT_PGI_soffset
:
11995 return "DW_AT_PGI_soffset";
11996 case DW_AT_PGI_lstride
:
11997 return "DW_AT_PGI_lstride";
11999 return "DW_AT_<unknown>";
12003 /* Convert a DWARF value form code into its string name. */
12006 dwarf_form_name (unsigned form
)
12011 return "DW_FORM_addr";
12012 case DW_FORM_block2
:
12013 return "DW_FORM_block2";
12014 case DW_FORM_block4
:
12015 return "DW_FORM_block4";
12016 case DW_FORM_data2
:
12017 return "DW_FORM_data2";
12018 case DW_FORM_data4
:
12019 return "DW_FORM_data4";
12020 case DW_FORM_data8
:
12021 return "DW_FORM_data8";
12022 case DW_FORM_string
:
12023 return "DW_FORM_string";
12024 case DW_FORM_block
:
12025 return "DW_FORM_block";
12026 case DW_FORM_block1
:
12027 return "DW_FORM_block1";
12028 case DW_FORM_data1
:
12029 return "DW_FORM_data1";
12031 return "DW_FORM_flag";
12032 case DW_FORM_sdata
:
12033 return "DW_FORM_sdata";
12035 return "DW_FORM_strp";
12036 case DW_FORM_udata
:
12037 return "DW_FORM_udata";
12038 case DW_FORM_ref_addr
:
12039 return "DW_FORM_ref_addr";
12041 return "DW_FORM_ref1";
12043 return "DW_FORM_ref2";
12045 return "DW_FORM_ref4";
12047 return "DW_FORM_ref8";
12048 case DW_FORM_ref_udata
:
12049 return "DW_FORM_ref_udata";
12050 case DW_FORM_indirect
:
12051 return "DW_FORM_indirect";
12052 case DW_FORM_sec_offset
:
12053 return "DW_FORM_sec_offset";
12054 case DW_FORM_exprloc
:
12055 return "DW_FORM_exprloc";
12056 case DW_FORM_flag_present
:
12057 return "DW_FORM_flag_present";
12059 return "DW_FORM_sig8";
12061 return "DW_FORM_<unknown>";
12065 /* Convert a DWARF stack opcode into its string name. */
12068 dwarf_stack_op_name (unsigned op
, int def
)
12073 return "DW_OP_addr";
12075 return "DW_OP_deref";
12076 case DW_OP_const1u
:
12077 return "DW_OP_const1u";
12078 case DW_OP_const1s
:
12079 return "DW_OP_const1s";
12080 case DW_OP_const2u
:
12081 return "DW_OP_const2u";
12082 case DW_OP_const2s
:
12083 return "DW_OP_const2s";
12084 case DW_OP_const4u
:
12085 return "DW_OP_const4u";
12086 case DW_OP_const4s
:
12087 return "DW_OP_const4s";
12088 case DW_OP_const8u
:
12089 return "DW_OP_const8u";
12090 case DW_OP_const8s
:
12091 return "DW_OP_const8s";
12093 return "DW_OP_constu";
12095 return "DW_OP_consts";
12097 return "DW_OP_dup";
12099 return "DW_OP_drop";
12101 return "DW_OP_over";
12103 return "DW_OP_pick";
12105 return "DW_OP_swap";
12107 return "DW_OP_rot";
12109 return "DW_OP_xderef";
12111 return "DW_OP_abs";
12113 return "DW_OP_and";
12115 return "DW_OP_div";
12117 return "DW_OP_minus";
12119 return "DW_OP_mod";
12121 return "DW_OP_mul";
12123 return "DW_OP_neg";
12125 return "DW_OP_not";
12129 return "DW_OP_plus";
12130 case DW_OP_plus_uconst
:
12131 return "DW_OP_plus_uconst";
12133 return "DW_OP_shl";
12135 return "DW_OP_shr";
12137 return "DW_OP_shra";
12139 return "DW_OP_xor";
12141 return "DW_OP_bra";
12155 return "DW_OP_skip";
12157 return "DW_OP_lit0";
12159 return "DW_OP_lit1";
12161 return "DW_OP_lit2";
12163 return "DW_OP_lit3";
12165 return "DW_OP_lit4";
12167 return "DW_OP_lit5";
12169 return "DW_OP_lit6";
12171 return "DW_OP_lit7";
12173 return "DW_OP_lit8";
12175 return "DW_OP_lit9";
12177 return "DW_OP_lit10";
12179 return "DW_OP_lit11";
12181 return "DW_OP_lit12";
12183 return "DW_OP_lit13";
12185 return "DW_OP_lit14";
12187 return "DW_OP_lit15";
12189 return "DW_OP_lit16";
12191 return "DW_OP_lit17";
12193 return "DW_OP_lit18";
12195 return "DW_OP_lit19";
12197 return "DW_OP_lit20";
12199 return "DW_OP_lit21";
12201 return "DW_OP_lit22";
12203 return "DW_OP_lit23";
12205 return "DW_OP_lit24";
12207 return "DW_OP_lit25";
12209 return "DW_OP_lit26";
12211 return "DW_OP_lit27";
12213 return "DW_OP_lit28";
12215 return "DW_OP_lit29";
12217 return "DW_OP_lit30";
12219 return "DW_OP_lit31";
12221 return "DW_OP_reg0";
12223 return "DW_OP_reg1";
12225 return "DW_OP_reg2";
12227 return "DW_OP_reg3";
12229 return "DW_OP_reg4";
12231 return "DW_OP_reg5";
12233 return "DW_OP_reg6";
12235 return "DW_OP_reg7";
12237 return "DW_OP_reg8";
12239 return "DW_OP_reg9";
12241 return "DW_OP_reg10";
12243 return "DW_OP_reg11";
12245 return "DW_OP_reg12";
12247 return "DW_OP_reg13";
12249 return "DW_OP_reg14";
12251 return "DW_OP_reg15";
12253 return "DW_OP_reg16";
12255 return "DW_OP_reg17";
12257 return "DW_OP_reg18";
12259 return "DW_OP_reg19";
12261 return "DW_OP_reg20";
12263 return "DW_OP_reg21";
12265 return "DW_OP_reg22";
12267 return "DW_OP_reg23";
12269 return "DW_OP_reg24";
12271 return "DW_OP_reg25";
12273 return "DW_OP_reg26";
12275 return "DW_OP_reg27";
12277 return "DW_OP_reg28";
12279 return "DW_OP_reg29";
12281 return "DW_OP_reg30";
12283 return "DW_OP_reg31";
12285 return "DW_OP_breg0";
12287 return "DW_OP_breg1";
12289 return "DW_OP_breg2";
12291 return "DW_OP_breg3";
12293 return "DW_OP_breg4";
12295 return "DW_OP_breg5";
12297 return "DW_OP_breg6";
12299 return "DW_OP_breg7";
12301 return "DW_OP_breg8";
12303 return "DW_OP_breg9";
12305 return "DW_OP_breg10";
12307 return "DW_OP_breg11";
12309 return "DW_OP_breg12";
12311 return "DW_OP_breg13";
12313 return "DW_OP_breg14";
12315 return "DW_OP_breg15";
12317 return "DW_OP_breg16";
12319 return "DW_OP_breg17";
12321 return "DW_OP_breg18";
12323 return "DW_OP_breg19";
12325 return "DW_OP_breg20";
12327 return "DW_OP_breg21";
12329 return "DW_OP_breg22";
12331 return "DW_OP_breg23";
12333 return "DW_OP_breg24";
12335 return "DW_OP_breg25";
12337 return "DW_OP_breg26";
12339 return "DW_OP_breg27";
12341 return "DW_OP_breg28";
12343 return "DW_OP_breg29";
12345 return "DW_OP_breg30";
12347 return "DW_OP_breg31";
12349 return "DW_OP_regx";
12351 return "DW_OP_fbreg";
12353 return "DW_OP_bregx";
12355 return "DW_OP_piece";
12356 case DW_OP_deref_size
:
12357 return "DW_OP_deref_size";
12358 case DW_OP_xderef_size
:
12359 return "DW_OP_xderef_size";
12361 return "DW_OP_nop";
12362 /* DWARF 3 extensions. */
12363 case DW_OP_push_object_address
:
12364 return "DW_OP_push_object_address";
12366 return "DW_OP_call2";
12368 return "DW_OP_call4";
12369 case DW_OP_call_ref
:
12370 return "DW_OP_call_ref";
12371 case DW_OP_form_tls_address
:
12372 return "DW_OP_form_tls_address";
12373 case DW_OP_call_frame_cfa
:
12374 return "DW_OP_call_frame_cfa";
12375 case DW_OP_bit_piece
:
12376 return "DW_OP_bit_piece";
12377 /* DWARF 4 extensions. */
12378 case DW_OP_implicit_value
:
12379 return "DW_OP_implicit_value";
12380 case DW_OP_stack_value
:
12381 return "DW_OP_stack_value";
12382 /* GNU extensions. */
12383 case DW_OP_GNU_push_tls_address
:
12384 return "DW_OP_GNU_push_tls_address";
12385 case DW_OP_GNU_uninit
:
12386 return "DW_OP_GNU_uninit";
12388 return def
? "OP_<unknown>" : NULL
;
12393 dwarf_bool_name (unsigned mybool
)
12401 /* Convert a DWARF type code into its string name. */
12404 dwarf_type_encoding_name (unsigned enc
)
12409 return "DW_ATE_void";
12410 case DW_ATE_address
:
12411 return "DW_ATE_address";
12412 case DW_ATE_boolean
:
12413 return "DW_ATE_boolean";
12414 case DW_ATE_complex_float
:
12415 return "DW_ATE_complex_float";
12417 return "DW_ATE_float";
12418 case DW_ATE_signed
:
12419 return "DW_ATE_signed";
12420 case DW_ATE_signed_char
:
12421 return "DW_ATE_signed_char";
12422 case DW_ATE_unsigned
:
12423 return "DW_ATE_unsigned";
12424 case DW_ATE_unsigned_char
:
12425 return "DW_ATE_unsigned_char";
12427 case DW_ATE_imaginary_float
:
12428 return "DW_ATE_imaginary_float";
12429 case DW_ATE_packed_decimal
:
12430 return "DW_ATE_packed_decimal";
12431 case DW_ATE_numeric_string
:
12432 return "DW_ATE_numeric_string";
12433 case DW_ATE_edited
:
12434 return "DW_ATE_edited";
12435 case DW_ATE_signed_fixed
:
12436 return "DW_ATE_signed_fixed";
12437 case DW_ATE_unsigned_fixed
:
12438 return "DW_ATE_unsigned_fixed";
12439 case DW_ATE_decimal_float
:
12440 return "DW_ATE_decimal_float";
12443 return "DW_ATE_UTF";
12444 /* HP extensions. */
12445 case DW_ATE_HP_float80
:
12446 return "DW_ATE_HP_float80";
12447 case DW_ATE_HP_complex_float80
:
12448 return "DW_ATE_HP_complex_float80";
12449 case DW_ATE_HP_float128
:
12450 return "DW_ATE_HP_float128";
12451 case DW_ATE_HP_complex_float128
:
12452 return "DW_ATE_HP_complex_float128";
12453 case DW_ATE_HP_floathpintel
:
12454 return "DW_ATE_HP_floathpintel";
12455 case DW_ATE_HP_imaginary_float80
:
12456 return "DW_ATE_HP_imaginary_float80";
12457 case DW_ATE_HP_imaginary_float128
:
12458 return "DW_ATE_HP_imaginary_float128";
12460 return "DW_ATE_<unknown>";
12464 /* Convert a DWARF call frame info operation to its string name. */
12468 dwarf_cfi_name (unsigned cfi_opc
)
12472 case DW_CFA_advance_loc
:
12473 return "DW_CFA_advance_loc";
12474 case DW_CFA_offset
:
12475 return "DW_CFA_offset";
12476 case DW_CFA_restore
:
12477 return "DW_CFA_restore";
12479 return "DW_CFA_nop";
12480 case DW_CFA_set_loc
:
12481 return "DW_CFA_set_loc";
12482 case DW_CFA_advance_loc1
:
12483 return "DW_CFA_advance_loc1";
12484 case DW_CFA_advance_loc2
:
12485 return "DW_CFA_advance_loc2";
12486 case DW_CFA_advance_loc4
:
12487 return "DW_CFA_advance_loc4";
12488 case DW_CFA_offset_extended
:
12489 return "DW_CFA_offset_extended";
12490 case DW_CFA_restore_extended
:
12491 return "DW_CFA_restore_extended";
12492 case DW_CFA_undefined
:
12493 return "DW_CFA_undefined";
12494 case DW_CFA_same_value
:
12495 return "DW_CFA_same_value";
12496 case DW_CFA_register
:
12497 return "DW_CFA_register";
12498 case DW_CFA_remember_state
:
12499 return "DW_CFA_remember_state";
12500 case DW_CFA_restore_state
:
12501 return "DW_CFA_restore_state";
12502 case DW_CFA_def_cfa
:
12503 return "DW_CFA_def_cfa";
12504 case DW_CFA_def_cfa_register
:
12505 return "DW_CFA_def_cfa_register";
12506 case DW_CFA_def_cfa_offset
:
12507 return "DW_CFA_def_cfa_offset";
12509 case DW_CFA_def_cfa_expression
:
12510 return "DW_CFA_def_cfa_expression";
12511 case DW_CFA_expression
:
12512 return "DW_CFA_expression";
12513 case DW_CFA_offset_extended_sf
:
12514 return "DW_CFA_offset_extended_sf";
12515 case DW_CFA_def_cfa_sf
:
12516 return "DW_CFA_def_cfa_sf";
12517 case DW_CFA_def_cfa_offset_sf
:
12518 return "DW_CFA_def_cfa_offset_sf";
12519 case DW_CFA_val_offset
:
12520 return "DW_CFA_val_offset";
12521 case DW_CFA_val_offset_sf
:
12522 return "DW_CFA_val_offset_sf";
12523 case DW_CFA_val_expression
:
12524 return "DW_CFA_val_expression";
12525 /* SGI/MIPS specific. */
12526 case DW_CFA_MIPS_advance_loc8
:
12527 return "DW_CFA_MIPS_advance_loc8";
12528 /* GNU extensions. */
12529 case DW_CFA_GNU_window_save
:
12530 return "DW_CFA_GNU_window_save";
12531 case DW_CFA_GNU_args_size
:
12532 return "DW_CFA_GNU_args_size";
12533 case DW_CFA_GNU_negative_offset_extended
:
12534 return "DW_CFA_GNU_negative_offset_extended";
12536 return "DW_CFA_<unknown>";
12542 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12546 print_spaces (indent
, f
);
12547 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12548 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12550 if (die
->parent
!= NULL
)
12552 print_spaces (indent
, f
);
12553 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12554 die
->parent
->offset
);
12557 print_spaces (indent
, f
);
12558 fprintf_unfiltered (f
, " has children: %s\n",
12559 dwarf_bool_name (die
->child
!= NULL
));
12561 print_spaces (indent
, f
);
12562 fprintf_unfiltered (f
, " attributes:\n");
12564 for (i
= 0; i
< die
->num_attrs
; ++i
)
12566 print_spaces (indent
, f
);
12567 fprintf_unfiltered (f
, " %s (%s) ",
12568 dwarf_attr_name (die
->attrs
[i
].name
),
12569 dwarf_form_name (die
->attrs
[i
].form
));
12571 switch (die
->attrs
[i
].form
)
12573 case DW_FORM_ref_addr
:
12575 fprintf_unfiltered (f
, "address: ");
12576 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12578 case DW_FORM_block2
:
12579 case DW_FORM_block4
:
12580 case DW_FORM_block
:
12581 case DW_FORM_block1
:
12582 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
12584 case DW_FORM_exprloc
:
12585 fprintf_unfiltered (f
, "expression: size %u",
12586 DW_BLOCK (&die
->attrs
[i
])->size
);
12591 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12592 (long) (DW_ADDR (&die
->attrs
[i
])));
12594 case DW_FORM_data1
:
12595 case DW_FORM_data2
:
12596 case DW_FORM_data4
:
12597 case DW_FORM_data8
:
12598 case DW_FORM_udata
:
12599 case DW_FORM_sdata
:
12600 fprintf_unfiltered (f
, "constant: %s",
12601 pulongest (DW_UNSND (&die
->attrs
[i
])));
12603 case DW_FORM_sec_offset
:
12604 fprintf_unfiltered (f
, "section offset: %s",
12605 pulongest (DW_UNSND (&die
->attrs
[i
])));
12608 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12609 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12610 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12612 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12614 case DW_FORM_string
:
12616 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12617 DW_STRING (&die
->attrs
[i
])
12618 ? DW_STRING (&die
->attrs
[i
]) : "",
12619 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
12622 if (DW_UNSND (&die
->attrs
[i
]))
12623 fprintf_unfiltered (f
, "flag: TRUE");
12625 fprintf_unfiltered (f
, "flag: FALSE");
12627 case DW_FORM_flag_present
:
12628 fprintf_unfiltered (f
, "flag: TRUE");
12630 case DW_FORM_indirect
:
12631 /* the reader will have reduced the indirect form to
12632 the "base form" so this form should not occur */
12633 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
12636 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
12637 die
->attrs
[i
].form
);
12640 fprintf_unfiltered (f
, "\n");
12645 dump_die_for_error (struct die_info
*die
)
12647 dump_die_shallow (gdb_stderr
, 0, die
);
12651 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
12653 int indent
= level
* 4;
12655 gdb_assert (die
!= NULL
);
12657 if (level
>= max_level
)
12660 dump_die_shallow (f
, indent
, die
);
12662 if (die
->child
!= NULL
)
12664 print_spaces (indent
, f
);
12665 fprintf_unfiltered (f
, " Children:");
12666 if (level
+ 1 < max_level
)
12668 fprintf_unfiltered (f
, "\n");
12669 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
12673 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
12677 if (die
->sibling
!= NULL
&& level
> 0)
12679 dump_die_1 (f
, level
, max_level
, die
->sibling
);
12683 /* This is called from the pdie macro in gdbinit.in.
12684 It's not static so gcc will keep a copy callable from gdb. */
12687 dump_die (struct die_info
*die
, int max_level
)
12689 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
12693 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
12697 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
12703 is_ref_attr (struct attribute
*attr
)
12705 switch (attr
->form
)
12707 case DW_FORM_ref_addr
:
12712 case DW_FORM_ref_udata
:
12719 static unsigned int
12720 dwarf2_get_ref_die_offset (struct attribute
*attr
)
12722 if (is_ref_attr (attr
))
12723 return DW_ADDR (attr
);
12725 complaint (&symfile_complaints
,
12726 _("unsupported die ref attribute form: '%s'"),
12727 dwarf_form_name (attr
->form
));
12731 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12732 * the value held by the attribute is not constant. */
12735 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
12737 if (attr
->form
== DW_FORM_sdata
)
12738 return DW_SND (attr
);
12739 else if (attr
->form
== DW_FORM_udata
12740 || attr
->form
== DW_FORM_data1
12741 || attr
->form
== DW_FORM_data2
12742 || attr
->form
== DW_FORM_data4
12743 || attr
->form
== DW_FORM_data8
)
12744 return DW_UNSND (attr
);
12747 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
12748 dwarf_form_name (attr
->form
));
12749 return default_value
;
12753 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12754 unit and add it to our queue.
12755 The result is non-zero if PER_CU was queued, otherwise the result is zero
12756 meaning either PER_CU is already queued or it is already loaded. */
12759 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
12760 struct dwarf2_per_cu_data
*per_cu
)
12762 /* We may arrive here during partial symbol reading, if we need full
12763 DIEs to process an unusual case (e.g. template arguments). Do
12764 not queue PER_CU, just tell our caller to load its DIEs. */
12765 if (dwarf2_per_objfile
->reading_partial_symbols
)
12767 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
12772 /* Mark the dependence relation so that we don't flush PER_CU
12774 dwarf2_add_dependence (this_cu
, per_cu
);
12776 /* If it's already on the queue, we have nothing to do. */
12777 if (per_cu
->queued
)
12780 /* If the compilation unit is already loaded, just mark it as
12782 if (per_cu
->cu
!= NULL
)
12784 per_cu
->cu
->last_used
= 0;
12788 /* Add it to the queue. */
12789 queue_comp_unit (per_cu
, this_cu
->objfile
);
12794 /* Follow reference or signature attribute ATTR of SRC_DIE.
12795 On entry *REF_CU is the CU of SRC_DIE.
12796 On exit *REF_CU is the CU of the result. */
12798 static struct die_info
*
12799 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
12800 struct dwarf2_cu
**ref_cu
)
12802 struct die_info
*die
;
12804 if (is_ref_attr (attr
))
12805 die
= follow_die_ref (src_die
, attr
, ref_cu
);
12806 else if (attr
->form
== DW_FORM_sig8
)
12807 die
= follow_die_sig (src_die
, attr
, ref_cu
);
12810 dump_die_for_error (src_die
);
12811 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12812 (*ref_cu
)->objfile
->name
);
12818 /* Follow reference OFFSET.
12819 On entry *REF_CU is the CU of the source die referencing OFFSET.
12820 On exit *REF_CU is the CU of the result.
12821 Returns NULL if OFFSET is invalid. */
12823 static struct die_info
*
12824 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
12826 struct die_info temp_die
;
12827 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
12829 gdb_assert (cu
->per_cu
!= NULL
);
12833 if (cu
->per_cu
->from_debug_types
)
12835 /* .debug_types CUs cannot reference anything outside their CU.
12836 If they need to, they have to reference a signatured type via
12838 if (! offset_in_cu_p (&cu
->header
, offset
))
12841 else if (! offset_in_cu_p (&cu
->header
, offset
))
12843 struct dwarf2_per_cu_data
*per_cu
;
12845 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
12847 /* If necessary, add it to the queue and load its DIEs. */
12848 if (maybe_queue_comp_unit (cu
, per_cu
))
12849 load_full_comp_unit (per_cu
, cu
->objfile
);
12851 target_cu
= per_cu
->cu
;
12853 else if (cu
->dies
== NULL
)
12855 /* We're loading full DIEs during partial symbol reading. */
12856 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
12857 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
12860 *ref_cu
= target_cu
;
12861 temp_die
.offset
= offset
;
12862 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
12865 /* Follow reference attribute ATTR of SRC_DIE.
12866 On entry *REF_CU is the CU of SRC_DIE.
12867 On exit *REF_CU is the CU of the result. */
12869 static struct die_info
*
12870 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
12871 struct dwarf2_cu
**ref_cu
)
12873 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
12874 struct dwarf2_cu
*cu
= *ref_cu
;
12875 struct die_info
*die
;
12877 die
= follow_die_offset (offset
, ref_cu
);
12879 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12880 "at 0x%x [in module %s]"),
12881 offset
, src_die
->offset
, cu
->objfile
->name
);
12886 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12887 value is intended for DW_OP_call*. */
12889 struct dwarf2_locexpr_baton
12890 dwarf2_fetch_die_location_block (unsigned int offset
,
12891 struct dwarf2_per_cu_data
*per_cu
)
12893 struct dwarf2_cu
*cu
= per_cu
->cu
;
12894 struct die_info
*die
;
12895 struct attribute
*attr
;
12896 struct dwarf2_locexpr_baton retval
;
12898 die
= follow_die_offset (offset
, &cu
);
12900 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12901 offset
, per_cu
->cu
->objfile
->name
);
12903 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
12906 /* DWARF: "If there is no such attribute, then there is no effect.". */
12908 retval
.data
= NULL
;
12913 if (!attr_form_is_block (attr
))
12914 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12915 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12916 offset
, per_cu
->cu
->objfile
->name
);
12918 retval
.data
= DW_BLOCK (attr
)->data
;
12919 retval
.size
= DW_BLOCK (attr
)->size
;
12921 retval
.per_cu
= cu
->per_cu
;
12925 /* Follow the signature attribute ATTR in SRC_DIE.
12926 On entry *REF_CU is the CU of SRC_DIE.
12927 On exit *REF_CU is the CU of the result. */
12929 static struct die_info
*
12930 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
12931 struct dwarf2_cu
**ref_cu
)
12933 struct objfile
*objfile
= (*ref_cu
)->objfile
;
12934 struct die_info temp_die
;
12935 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12936 struct dwarf2_cu
*sig_cu
;
12937 struct die_info
*die
;
12939 /* sig_type will be NULL if the signatured type is missing from
12941 if (sig_type
== NULL
)
12942 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12943 "at 0x%x [in module %s]"),
12944 src_die
->offset
, objfile
->name
);
12946 /* If necessary, add it to the queue and load its DIEs. */
12948 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
12949 read_signatured_type (objfile
, sig_type
);
12951 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
12953 sig_cu
= sig_type
->per_cu
.cu
;
12954 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
12955 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
12962 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12963 "at 0x%x [in module %s]"),
12964 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
12967 /* Given an offset of a signatured type, return its signatured_type. */
12969 static struct signatured_type
*
12970 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
12972 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
12973 unsigned int length
, initial_length_size
;
12974 unsigned int sig_offset
;
12975 struct signatured_type find_entry
, *type_sig
;
12977 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
12978 sig_offset
= (initial_length_size
12980 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
12981 + 1 /*address_size*/);
12982 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
12983 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
12985 /* This is only used to lookup previously recorded types.
12986 If we didn't find it, it's our bug. */
12987 gdb_assert (type_sig
!= NULL
);
12988 gdb_assert (offset
== type_sig
->offset
);
12993 /* Read in signatured type at OFFSET and build its CU and die(s). */
12996 read_signatured_type_at_offset (struct objfile
*objfile
,
12997 unsigned int offset
)
12999 struct signatured_type
*type_sig
;
13001 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13003 /* We have the section offset, but we need the signature to do the
13004 hash table lookup. */
13005 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13007 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13009 read_signatured_type (objfile
, type_sig
);
13011 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13014 /* Read in a signatured type and build its CU and DIEs. */
13017 read_signatured_type (struct objfile
*objfile
,
13018 struct signatured_type
*type_sig
)
13020 gdb_byte
*types_ptr
;
13021 struct die_reader_specs reader_specs
;
13022 struct dwarf2_cu
*cu
;
13023 ULONGEST signature
;
13024 struct cleanup
*back_to
, *free_cu_cleanup
;
13025 struct attribute
*attr
;
13027 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13028 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13030 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13032 cu
= xmalloc (sizeof (struct dwarf2_cu
));
13033 memset (cu
, 0, sizeof (struct dwarf2_cu
));
13034 obstack_init (&cu
->comp_unit_obstack
);
13035 cu
->objfile
= objfile
;
13036 type_sig
->per_cu
.cu
= cu
;
13037 cu
->per_cu
= &type_sig
->per_cu
;
13039 /* If an error occurs while loading, release our storage. */
13040 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13042 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13043 types_ptr
, objfile
->obfd
);
13044 gdb_assert (signature
== type_sig
->signature
);
13047 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13051 &cu
->comp_unit_obstack
,
13052 hashtab_obstack_allocate
,
13053 dummy_obstack_deallocate
);
13055 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13056 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13058 init_cu_die_reader (&reader_specs
, cu
);
13060 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13063 /* We try not to read any attributes in this function, because not
13064 all objfiles needed for references have been loaded yet, and symbol
13065 table processing isn't initialized. But we have to set the CU language,
13066 or we won't be able to build types correctly. */
13067 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
13069 set_cu_language (DW_UNSND (attr
), cu
);
13071 set_cu_language (language_minimal
, cu
);
13073 do_cleanups (back_to
);
13075 /* We've successfully allocated this compilation unit. Let our caller
13076 clean it up when finished with it. */
13077 discard_cleanups (free_cu_cleanup
);
13079 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13080 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13083 /* Decode simple location descriptions.
13084 Given a pointer to a dwarf block that defines a location, compute
13085 the location and return the value.
13087 NOTE drow/2003-11-18: This function is called in two situations
13088 now: for the address of static or global variables (partial symbols
13089 only) and for offsets into structures which are expected to be
13090 (more or less) constant. The partial symbol case should go away,
13091 and only the constant case should remain. That will let this
13092 function complain more accurately. A few special modes are allowed
13093 without complaint for global variables (for instance, global
13094 register values and thread-local values).
13096 A location description containing no operations indicates that the
13097 object is optimized out. The return value is 0 for that case.
13098 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13099 callers will only want a very basic result and this can become a
13102 Note that stack[0] is unused except as a default error return.
13103 Note that stack overflow is not yet handled. */
13106 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13108 struct objfile
*objfile
= cu
->objfile
;
13110 int size
= blk
->size
;
13111 gdb_byte
*data
= blk
->data
;
13112 CORE_ADDR stack
[64];
13114 unsigned int bytes_read
, unsnd
;
13158 stack
[++stacki
] = op
- DW_OP_lit0
;
13193 stack
[++stacki
] = op
- DW_OP_reg0
;
13195 dwarf2_complex_location_expr_complaint ();
13199 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13201 stack
[++stacki
] = unsnd
;
13203 dwarf2_complex_location_expr_complaint ();
13207 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13212 case DW_OP_const1u
:
13213 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13217 case DW_OP_const1s
:
13218 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13222 case DW_OP_const2u
:
13223 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13227 case DW_OP_const2s
:
13228 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13232 case DW_OP_const4u
:
13233 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13237 case DW_OP_const4s
:
13238 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13243 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13249 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13254 stack
[stacki
+ 1] = stack
[stacki
];
13259 stack
[stacki
- 1] += stack
[stacki
];
13263 case DW_OP_plus_uconst
:
13264 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13269 stack
[stacki
- 1] -= stack
[stacki
];
13274 /* If we're not the last op, then we definitely can't encode
13275 this using GDB's address_class enum. This is valid for partial
13276 global symbols, although the variable's address will be bogus
13279 dwarf2_complex_location_expr_complaint ();
13282 case DW_OP_GNU_push_tls_address
:
13283 /* The top of the stack has the offset from the beginning
13284 of the thread control block at which the variable is located. */
13285 /* Nothing should follow this operator, so the top of stack would
13287 /* This is valid for partial global symbols, but the variable's
13288 address will be bogus in the psymtab. */
13290 dwarf2_complex_location_expr_complaint ();
13293 case DW_OP_GNU_uninit
:
13297 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13298 dwarf_stack_op_name (op
, 1));
13299 return (stack
[stacki
]);
13302 return (stack
[stacki
]);
13305 /* memory allocation interface */
13307 static struct dwarf_block
*
13308 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13310 struct dwarf_block
*blk
;
13312 blk
= (struct dwarf_block
*)
13313 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13317 static struct abbrev_info
*
13318 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13320 struct abbrev_info
*abbrev
;
13322 abbrev
= (struct abbrev_info
*)
13323 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13324 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13328 static struct die_info
*
13329 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13331 struct die_info
*die
;
13332 size_t size
= sizeof (struct die_info
);
13335 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13337 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13338 memset (die
, 0, sizeof (struct die_info
));
13343 /* Macro support. */
13346 /* Return the full name of file number I in *LH's file name table.
13347 Use COMP_DIR as the name of the current directory of the
13348 compilation. The result is allocated using xmalloc; the caller is
13349 responsible for freeing it. */
13351 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13353 /* Is the file number a valid index into the line header's file name
13354 table? Remember that file numbers start with one, not zero. */
13355 if (1 <= file
&& file
<= lh
->num_file_names
)
13357 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13359 if (IS_ABSOLUTE_PATH (fe
->name
))
13360 return xstrdup (fe
->name
);
13368 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13374 dir_len
= strlen (dir
);
13375 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13376 strcpy (full_name
, dir
);
13377 full_name
[dir_len
] = '/';
13378 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13382 return xstrdup (fe
->name
);
13387 /* The compiler produced a bogus file number. We can at least
13388 record the macro definitions made in the file, even if we
13389 won't be able to find the file by name. */
13390 char fake_name
[80];
13392 sprintf (fake_name
, "<bad macro file number %d>", file
);
13394 complaint (&symfile_complaints
,
13395 _("bad file number in macro information (%d)"),
13398 return xstrdup (fake_name
);
13403 static struct macro_source_file
*
13404 macro_start_file (int file
, int line
,
13405 struct macro_source_file
*current_file
,
13406 const char *comp_dir
,
13407 struct line_header
*lh
, struct objfile
*objfile
)
13409 /* The full name of this source file. */
13410 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13412 /* We don't create a macro table for this compilation unit
13413 at all until we actually get a filename. */
13414 if (! pending_macros
)
13415 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13416 objfile
->macro_cache
);
13418 if (! current_file
)
13419 /* If we have no current file, then this must be the start_file
13420 directive for the compilation unit's main source file. */
13421 current_file
= macro_set_main (pending_macros
, full_name
);
13423 current_file
= macro_include (current_file
, line
, full_name
);
13427 return current_file
;
13431 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13432 followed by a null byte. */
13434 copy_string (const char *buf
, int len
)
13436 char *s
= xmalloc (len
+ 1);
13438 memcpy (s
, buf
, len
);
13444 static const char *
13445 consume_improper_spaces (const char *p
, const char *body
)
13449 complaint (&symfile_complaints
,
13450 _("macro definition contains spaces in formal argument list:\n`%s'"),
13462 parse_macro_definition (struct macro_source_file
*file
, int line
,
13467 /* The body string takes one of two forms. For object-like macro
13468 definitions, it should be:
13470 <macro name> " " <definition>
13472 For function-like macro definitions, it should be:
13474 <macro name> "() " <definition>
13476 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13478 Spaces may appear only where explicitly indicated, and in the
13481 The Dwarf 2 spec says that an object-like macro's name is always
13482 followed by a space, but versions of GCC around March 2002 omit
13483 the space when the macro's definition is the empty string.
13485 The Dwarf 2 spec says that there should be no spaces between the
13486 formal arguments in a function-like macro's formal argument list,
13487 but versions of GCC around March 2002 include spaces after the
13491 /* Find the extent of the macro name. The macro name is terminated
13492 by either a space or null character (for an object-like macro) or
13493 an opening paren (for a function-like macro). */
13494 for (p
= body
; *p
; p
++)
13495 if (*p
== ' ' || *p
== '(')
13498 if (*p
== ' ' || *p
== '\0')
13500 /* It's an object-like macro. */
13501 int name_len
= p
- body
;
13502 char *name
= copy_string (body
, name_len
);
13503 const char *replacement
;
13506 replacement
= body
+ name_len
+ 1;
13509 dwarf2_macro_malformed_definition_complaint (body
);
13510 replacement
= body
+ name_len
;
13513 macro_define_object (file
, line
, name
, replacement
);
13517 else if (*p
== '(')
13519 /* It's a function-like macro. */
13520 char *name
= copy_string (body
, p
- body
);
13523 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13527 p
= consume_improper_spaces (p
, body
);
13529 /* Parse the formal argument list. */
13530 while (*p
&& *p
!= ')')
13532 /* Find the extent of the current argument name. */
13533 const char *arg_start
= p
;
13535 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13538 if (! *p
|| p
== arg_start
)
13539 dwarf2_macro_malformed_definition_complaint (body
);
13542 /* Make sure argv has room for the new argument. */
13543 if (argc
>= argv_size
)
13546 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13549 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13552 p
= consume_improper_spaces (p
, body
);
13554 /* Consume the comma, if present. */
13559 p
= consume_improper_spaces (p
, body
);
13568 /* Perfectly formed definition, no complaints. */
13569 macro_define_function (file
, line
, name
,
13570 argc
, (const char **) argv
,
13572 else if (*p
== '\0')
13574 /* Complain, but do define it. */
13575 dwarf2_macro_malformed_definition_complaint (body
);
13576 macro_define_function (file
, line
, name
,
13577 argc
, (const char **) argv
,
13581 /* Just complain. */
13582 dwarf2_macro_malformed_definition_complaint (body
);
13585 /* Just complain. */
13586 dwarf2_macro_malformed_definition_complaint (body
);
13592 for (i
= 0; i
< argc
; i
++)
13598 dwarf2_macro_malformed_definition_complaint (body
);
13603 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
13604 char *comp_dir
, bfd
*abfd
,
13605 struct dwarf2_cu
*cu
)
13607 gdb_byte
*mac_ptr
, *mac_end
;
13608 struct macro_source_file
*current_file
= 0;
13609 enum dwarf_macinfo_record_type macinfo_type
;
13610 int at_commandline
;
13612 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13613 &dwarf2_per_objfile
->macinfo
);
13614 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
13616 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
13620 /* First pass: Find the name of the base filename.
13621 This filename is needed in order to process all macros whose definition
13622 (or undefinition) comes from the command line. These macros are defined
13623 before the first DW_MACINFO_start_file entry, and yet still need to be
13624 associated to the base file.
13626 To determine the base file name, we scan the macro definitions until we
13627 reach the first DW_MACINFO_start_file entry. We then initialize
13628 CURRENT_FILE accordingly so that any macro definition found before the
13629 first DW_MACINFO_start_file can still be associated to the base file. */
13631 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13632 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
13633 + dwarf2_per_objfile
->macinfo
.size
;
13637 /* Do we at least have room for a macinfo type byte? */
13638 if (mac_ptr
>= mac_end
)
13640 /* Complaint is printed during the second pass as GDB will probably
13641 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13645 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13648 switch (macinfo_type
)
13650 /* A zero macinfo type indicates the end of the macro
13655 case DW_MACINFO_define
:
13656 case DW_MACINFO_undef
:
13657 /* Only skip the data by MAC_PTR. */
13659 unsigned int bytes_read
;
13661 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13662 mac_ptr
+= bytes_read
;
13663 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13664 mac_ptr
+= bytes_read
;
13668 case DW_MACINFO_start_file
:
13670 unsigned int bytes_read
;
13673 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13674 mac_ptr
+= bytes_read
;
13675 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13676 mac_ptr
+= bytes_read
;
13678 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
13683 case DW_MACINFO_end_file
:
13684 /* No data to skip by MAC_PTR. */
13687 case DW_MACINFO_vendor_ext
:
13688 /* Only skip the data by MAC_PTR. */
13690 unsigned int bytes_read
;
13692 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13693 mac_ptr
+= bytes_read
;
13694 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13695 mac_ptr
+= bytes_read
;
13702 } while (macinfo_type
!= 0 && current_file
== NULL
);
13704 /* Second pass: Process all entries.
13706 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13707 command-line macro definitions/undefinitions. This flag is unset when we
13708 reach the first DW_MACINFO_start_file entry. */
13710 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13712 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13713 GDB is still reading the definitions from command line. First
13714 DW_MACINFO_start_file will need to be ignored as it was already executed
13715 to create CURRENT_FILE for the main source holding also the command line
13716 definitions. On first met DW_MACINFO_start_file this flag is reset to
13717 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13719 at_commandline
= 1;
13723 /* Do we at least have room for a macinfo type byte? */
13724 if (mac_ptr
>= mac_end
)
13726 dwarf2_macros_too_long_complaint ();
13730 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13733 switch (macinfo_type
)
13735 /* A zero macinfo type indicates the end of the macro
13740 case DW_MACINFO_define
:
13741 case DW_MACINFO_undef
:
13743 unsigned int bytes_read
;
13747 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13748 mac_ptr
+= bytes_read
;
13749 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13750 mac_ptr
+= bytes_read
;
13752 if (! current_file
)
13754 /* DWARF violation as no main source is present. */
13755 complaint (&symfile_complaints
,
13756 _("debug info with no main source gives macro %s "
13758 macinfo_type
== DW_MACINFO_define
?
13760 macinfo_type
== DW_MACINFO_undef
?
13761 _("undefinition") :
13762 _("something-or-other"), line
, body
);
13765 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13766 complaint (&symfile_complaints
,
13767 _("debug info gives %s macro %s with %s line %d: %s"),
13768 at_commandline
? _("command-line") : _("in-file"),
13769 macinfo_type
== DW_MACINFO_define
?
13771 macinfo_type
== DW_MACINFO_undef
?
13772 _("undefinition") :
13773 _("something-or-other"),
13774 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
13776 if (macinfo_type
== DW_MACINFO_define
)
13777 parse_macro_definition (current_file
, line
, body
);
13778 else if (macinfo_type
== DW_MACINFO_undef
)
13779 macro_undef (current_file
, line
, body
);
13783 case DW_MACINFO_start_file
:
13785 unsigned int bytes_read
;
13788 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13789 mac_ptr
+= bytes_read
;
13790 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13791 mac_ptr
+= bytes_read
;
13793 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13794 complaint (&symfile_complaints
,
13795 _("debug info gives source %d included "
13796 "from %s at %s line %d"),
13797 file
, at_commandline
? _("command-line") : _("file"),
13798 line
== 0 ? _("zero") : _("non-zero"), line
);
13800 if (at_commandline
)
13802 /* This DW_MACINFO_start_file was executed in the pass one. */
13803 at_commandline
= 0;
13806 current_file
= macro_start_file (file
, line
,
13807 current_file
, comp_dir
,
13812 case DW_MACINFO_end_file
:
13813 if (! current_file
)
13814 complaint (&symfile_complaints
,
13815 _("macro debug info has an unmatched `close_file' directive"));
13818 current_file
= current_file
->included_by
;
13819 if (! current_file
)
13821 enum dwarf_macinfo_record_type next_type
;
13823 /* GCC circa March 2002 doesn't produce the zero
13824 type byte marking the end of the compilation
13825 unit. Complain if it's not there, but exit no
13828 /* Do we at least have room for a macinfo type byte? */
13829 if (mac_ptr
>= mac_end
)
13831 dwarf2_macros_too_long_complaint ();
13835 /* We don't increment mac_ptr here, so this is just
13837 next_type
= read_1_byte (abfd
, mac_ptr
);
13838 if (next_type
!= 0)
13839 complaint (&symfile_complaints
,
13840 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13847 case DW_MACINFO_vendor_ext
:
13849 unsigned int bytes_read
;
13853 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13854 mac_ptr
+= bytes_read
;
13855 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13856 mac_ptr
+= bytes_read
;
13858 /* We don't recognize any vendor extensions. */
13862 } while (macinfo_type
!= 0);
13865 /* Check if the attribute's form is a DW_FORM_block*
13866 if so return true else false. */
13868 attr_form_is_block (struct attribute
*attr
)
13870 return (attr
== NULL
? 0 :
13871 attr
->form
== DW_FORM_block1
13872 || attr
->form
== DW_FORM_block2
13873 || attr
->form
== DW_FORM_block4
13874 || attr
->form
== DW_FORM_block
13875 || attr
->form
== DW_FORM_exprloc
);
13878 /* Return non-zero if ATTR's value is a section offset --- classes
13879 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13880 You may use DW_UNSND (attr) to retrieve such offsets.
13882 Section 7.5.4, "Attribute Encodings", explains that no attribute
13883 may have a value that belongs to more than one of these classes; it
13884 would be ambiguous if we did, because we use the same forms for all
13887 attr_form_is_section_offset (struct attribute
*attr
)
13889 return (attr
->form
== DW_FORM_data4
13890 || attr
->form
== DW_FORM_data8
13891 || attr
->form
== DW_FORM_sec_offset
);
13895 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13896 zero otherwise. When this function returns true, you can apply
13897 dwarf2_get_attr_constant_value to it.
13899 However, note that for some attributes you must check
13900 attr_form_is_section_offset before using this test. DW_FORM_data4
13901 and DW_FORM_data8 are members of both the constant class, and of
13902 the classes that contain offsets into other debug sections
13903 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13904 that, if an attribute's can be either a constant or one of the
13905 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13906 taken as section offsets, not constants. */
13908 attr_form_is_constant (struct attribute
*attr
)
13910 switch (attr
->form
)
13912 case DW_FORM_sdata
:
13913 case DW_FORM_udata
:
13914 case DW_FORM_data1
:
13915 case DW_FORM_data2
:
13916 case DW_FORM_data4
:
13917 case DW_FORM_data8
:
13925 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
13926 struct dwarf2_cu
*cu
)
13928 if (attr_form_is_section_offset (attr
)
13929 /* ".debug_loc" may not exist at all, or the offset may be outside
13930 the section. If so, fall through to the complaint in the
13932 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
13934 struct dwarf2_loclist_baton
*baton
;
13936 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13937 sizeof (struct dwarf2_loclist_baton
));
13938 baton
->per_cu
= cu
->per_cu
;
13939 gdb_assert (baton
->per_cu
);
13941 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13942 &dwarf2_per_objfile
->loc
);
13944 /* We don't know how long the location list is, but make sure we
13945 don't run off the edge of the section. */
13946 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
13947 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
13948 baton
->base_address
= cu
->base_address
;
13949 if (cu
->base_known
== 0)
13950 complaint (&symfile_complaints
,
13951 _("Location list used without specifying the CU base address."));
13953 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
13954 SYMBOL_LOCATION_BATON (sym
) = baton
;
13958 struct dwarf2_locexpr_baton
*baton
;
13960 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13961 sizeof (struct dwarf2_locexpr_baton
));
13962 baton
->per_cu
= cu
->per_cu
;
13963 gdb_assert (baton
->per_cu
);
13965 if (attr_form_is_block (attr
))
13967 /* Note that we're just copying the block's data pointer
13968 here, not the actual data. We're still pointing into the
13969 info_buffer for SYM's objfile; right now we never release
13970 that buffer, but when we do clean up properly this may
13972 baton
->size
= DW_BLOCK (attr
)->size
;
13973 baton
->data
= DW_BLOCK (attr
)->data
;
13977 dwarf2_invalid_attrib_class_complaint ("location description",
13978 SYMBOL_NATURAL_NAME (sym
));
13980 baton
->data
= NULL
;
13983 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
13984 SYMBOL_LOCATION_BATON (sym
) = baton
;
13988 /* Return the OBJFILE associated with the compilation unit CU. If CU
13989 came from a separate debuginfo file, then the master objfile is
13993 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
13995 struct objfile
*objfile
= per_cu
->objfile
;
13997 /* Return the master objfile, so that we can report and look up the
13998 correct file containing this variable. */
13999 if (objfile
->separate_debug_objfile_backlink
)
14000 objfile
= objfile
->separate_debug_objfile_backlink
;
14005 /* Return the address size given in the compilation unit header for CU. */
14008 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14011 return per_cu
->cu
->header
.addr_size
;
14014 /* If the CU is not currently read in, we re-read its header. */
14015 struct objfile
*objfile
= per_cu
->objfile
;
14016 struct dwarf2_per_objfile
*per_objfile
14017 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14018 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14019 struct comp_unit_head cu_header
;
14021 memset (&cu_header
, 0, sizeof cu_header
);
14022 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14023 return cu_header
.addr_size
;
14027 /* Return the offset size given in the compilation unit header for CU. */
14030 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14033 return per_cu
->cu
->header
.offset_size
;
14036 /* If the CU is not currently read in, we re-read its header. */
14037 struct objfile
*objfile
= per_cu
->objfile
;
14038 struct dwarf2_per_objfile
*per_objfile
14039 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14040 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14041 struct comp_unit_head cu_header
;
14043 memset (&cu_header
, 0, sizeof cu_header
);
14044 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14045 return cu_header
.offset_size
;
14049 /* Return the text offset of the CU. The returned offset comes from
14050 this CU's objfile. If this objfile came from a separate debuginfo
14051 file, then the offset may be different from the corresponding
14052 offset in the parent objfile. */
14055 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14057 struct objfile
*objfile
= per_cu
->objfile
;
14059 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14062 /* Locate the .debug_info compilation unit from CU's objfile which contains
14063 the DIE at OFFSET. Raises an error on failure. */
14065 static struct dwarf2_per_cu_data
*
14066 dwarf2_find_containing_comp_unit (unsigned int offset
,
14067 struct objfile
*objfile
)
14069 struct dwarf2_per_cu_data
*this_cu
;
14073 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14076 int mid
= low
+ (high
- low
) / 2;
14078 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14083 gdb_assert (low
== high
);
14084 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14087 error (_("Dwarf Error: could not find partial DIE containing "
14088 "offset 0x%lx [in module %s]"),
14089 (long) offset
, bfd_get_filename (objfile
->obfd
));
14091 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14092 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14096 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14097 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14098 && offset
>= this_cu
->offset
+ this_cu
->length
)
14099 error (_("invalid dwarf2 offset %u"), offset
);
14100 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14105 /* Locate the compilation unit from OBJFILE which is located at exactly
14106 OFFSET. Raises an error on failure. */
14108 static struct dwarf2_per_cu_data
*
14109 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14111 struct dwarf2_per_cu_data
*this_cu
;
14113 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14114 if (this_cu
->offset
!= offset
)
14115 error (_("no compilation unit with offset %u."), offset
);
14119 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14121 static struct dwarf2_cu
*
14122 alloc_one_comp_unit (struct objfile
*objfile
)
14124 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
14125 cu
->objfile
= objfile
;
14126 obstack_init (&cu
->comp_unit_obstack
);
14130 /* Release one cached compilation unit, CU. We unlink it from the tree
14131 of compilation units, but we don't remove it from the read_in_chain;
14132 the caller is responsible for that.
14133 NOTE: DATA is a void * because this function is also used as a
14134 cleanup routine. */
14137 free_one_comp_unit (void *data
)
14139 struct dwarf2_cu
*cu
= data
;
14141 if (cu
->per_cu
!= NULL
)
14142 cu
->per_cu
->cu
= NULL
;
14145 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14150 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14151 when we're finished with it. We can't free the pointer itself, but be
14152 sure to unlink it from the cache. Also release any associated storage
14153 and perform cache maintenance.
14155 Only used during partial symbol parsing. */
14158 free_stack_comp_unit (void *data
)
14160 struct dwarf2_cu
*cu
= data
;
14162 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14163 cu
->partial_dies
= NULL
;
14165 if (cu
->per_cu
!= NULL
)
14167 /* This compilation unit is on the stack in our caller, so we
14168 should not xfree it. Just unlink it. */
14169 cu
->per_cu
->cu
= NULL
;
14172 /* If we had a per-cu pointer, then we may have other compilation
14173 units loaded, so age them now. */
14174 age_cached_comp_units ();
14178 /* Free all cached compilation units. */
14181 free_cached_comp_units (void *data
)
14183 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14185 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14186 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14187 while (per_cu
!= NULL
)
14189 struct dwarf2_per_cu_data
*next_cu
;
14191 next_cu
= per_cu
->cu
->read_in_chain
;
14193 free_one_comp_unit (per_cu
->cu
);
14194 *last_chain
= next_cu
;
14200 /* Increase the age counter on each cached compilation unit, and free
14201 any that are too old. */
14204 age_cached_comp_units (void)
14206 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14208 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14209 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14210 while (per_cu
!= NULL
)
14212 per_cu
->cu
->last_used
++;
14213 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14214 dwarf2_mark (per_cu
->cu
);
14215 per_cu
= per_cu
->cu
->read_in_chain
;
14218 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14219 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14220 while (per_cu
!= NULL
)
14222 struct dwarf2_per_cu_data
*next_cu
;
14224 next_cu
= per_cu
->cu
->read_in_chain
;
14226 if (!per_cu
->cu
->mark
)
14228 free_one_comp_unit (per_cu
->cu
);
14229 *last_chain
= next_cu
;
14232 last_chain
= &per_cu
->cu
->read_in_chain
;
14238 /* Remove a single compilation unit from the cache. */
14241 free_one_cached_comp_unit (void *target_cu
)
14243 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14245 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14246 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14247 while (per_cu
!= NULL
)
14249 struct dwarf2_per_cu_data
*next_cu
;
14251 next_cu
= per_cu
->cu
->read_in_chain
;
14253 if (per_cu
->cu
== target_cu
)
14255 free_one_comp_unit (per_cu
->cu
);
14256 *last_chain
= next_cu
;
14260 last_chain
= &per_cu
->cu
->read_in_chain
;
14266 /* Release all extra memory associated with OBJFILE. */
14269 dwarf2_free_objfile (struct objfile
*objfile
)
14271 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14273 if (dwarf2_per_objfile
== NULL
)
14276 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14277 free_cached_comp_units (NULL
);
14279 if (dwarf2_per_objfile
->using_index
)
14283 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
14286 struct dwarf2_per_cu_data
*per_cu
=
14287 dwarf2_per_objfile
->all_comp_units
[i
];
14289 if (!per_cu
->v
.quick
->lines
)
14292 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
14294 if (per_cu
->v
.quick
->file_names
)
14295 xfree ((void *) per_cu
->v
.quick
->file_names
[j
]);
14296 if (per_cu
->v
.quick
->full_names
)
14297 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
14300 free_line_header (per_cu
->v
.quick
->lines
);
14304 /* Everything else should be on the objfile obstack. */
14307 /* A pair of DIE offset and GDB type pointer. We store these
14308 in a hash table separate from the DIEs, and preserve them
14309 when the DIEs are flushed out of cache. */
14311 struct dwarf2_offset_and_type
14313 unsigned int offset
;
14317 /* Hash function for a dwarf2_offset_and_type. */
14320 offset_and_type_hash (const void *item
)
14322 const struct dwarf2_offset_and_type
*ofs
= item
;
14324 return ofs
->offset
;
14327 /* Equality function for a dwarf2_offset_and_type. */
14330 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14332 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14333 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14335 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14338 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14339 table if necessary. For convenience, return TYPE.
14341 The DIEs reading must have careful ordering to:
14342 * Not cause infite loops trying to read in DIEs as a prerequisite for
14343 reading current DIE.
14344 * Not trying to dereference contents of still incompletely read in types
14345 while reading in other DIEs.
14346 * Enable referencing still incompletely read in types just by a pointer to
14347 the type without accessing its fields.
14349 Therefore caller should follow these rules:
14350 * Try to fetch any prerequisite types we may need to build this DIE type
14351 before building the type and calling set_die_type.
14352 * After building type call set_die_type for current DIE as soon as
14353 possible before fetching more types to complete the current type.
14354 * Make the type as complete as possible before fetching more types. */
14356 static struct type
*
14357 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14359 struct dwarf2_offset_and_type
**slot
, ofs
;
14360 struct objfile
*objfile
= cu
->objfile
;
14361 htab_t
*type_hash_ptr
;
14363 /* For Ada types, make sure that the gnat-specific data is always
14364 initialized (if not already set). There are a few types where
14365 we should not be doing so, because the type-specific area is
14366 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14367 where the type-specific area is used to store the floatformat).
14368 But this is not a problem, because the gnat-specific information
14369 is actually not needed for these types. */
14370 if (need_gnat_info (cu
)
14371 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14372 && TYPE_CODE (type
) != TYPE_CODE_FLT
14373 && !HAVE_GNAT_AUX_INFO (type
))
14374 INIT_GNAT_SPECIFIC (type
);
14376 if (cu
->per_cu
->from_debug_types
)
14377 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14379 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14381 if (*type_hash_ptr
== NULL
)
14384 = htab_create_alloc_ex (127,
14385 offset_and_type_hash
,
14386 offset_and_type_eq
,
14388 &objfile
->objfile_obstack
,
14389 hashtab_obstack_allocate
,
14390 dummy_obstack_deallocate
);
14393 ofs
.offset
= die
->offset
;
14395 slot
= (struct dwarf2_offset_and_type
**)
14396 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14398 complaint (&symfile_complaints
,
14399 _("A problem internal to GDB: DIE 0x%x has type already set"),
14401 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14406 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14407 table, or return NULL if the die does not have a saved type. */
14409 static struct type
*
14410 get_die_type_at_offset (unsigned int offset
,
14411 struct dwarf2_per_cu_data
*per_cu
)
14413 struct dwarf2_offset_and_type
*slot
, ofs
;
14416 if (per_cu
->from_debug_types
)
14417 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14419 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14420 if (type_hash
== NULL
)
14423 ofs
.offset
= offset
;
14424 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14431 /* Look up the type for DIE in the appropriate type_hash table,
14432 or return NULL if DIE does not have a saved type. */
14434 static struct type
*
14435 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14437 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14440 /* Add a dependence relationship from CU to REF_PER_CU. */
14443 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14444 struct dwarf2_per_cu_data
*ref_per_cu
)
14448 if (cu
->dependencies
== NULL
)
14450 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14451 NULL
, &cu
->comp_unit_obstack
,
14452 hashtab_obstack_allocate
,
14453 dummy_obstack_deallocate
);
14455 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14457 *slot
= ref_per_cu
;
14460 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14461 Set the mark field in every compilation unit in the
14462 cache that we must keep because we are keeping CU. */
14465 dwarf2_mark_helper (void **slot
, void *data
)
14467 struct dwarf2_per_cu_data
*per_cu
;
14469 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14470 if (per_cu
->cu
->mark
)
14472 per_cu
->cu
->mark
= 1;
14474 if (per_cu
->cu
->dependencies
!= NULL
)
14475 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14480 /* Set the mark field in CU and in every other compilation unit in the
14481 cache that we must keep because we are keeping CU. */
14484 dwarf2_mark (struct dwarf2_cu
*cu
)
14489 if (cu
->dependencies
!= NULL
)
14490 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14494 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14498 per_cu
->cu
->mark
= 0;
14499 per_cu
= per_cu
->cu
->read_in_chain
;
14503 /* Trivial hash function for partial_die_info: the hash value of a DIE
14504 is its offset in .debug_info for this objfile. */
14507 partial_die_hash (const void *item
)
14509 const struct partial_die_info
*part_die
= item
;
14511 return part_die
->offset
;
14514 /* Trivial comparison function for partial_die_info structures: two DIEs
14515 are equal if they have the same offset. */
14518 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14520 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14521 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14523 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14526 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14527 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14530 set_dwarf2_cmd (char *args
, int from_tty
)
14532 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14536 show_dwarf2_cmd (char *args
, int from_tty
)
14538 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14541 /* If section described by INFO was mmapped, munmap it now. */
14544 munmap_section_buffer (struct dwarf2_section_info
*info
)
14546 if (info
->was_mmapped
)
14549 intptr_t begin
= (intptr_t) info
->buffer
;
14550 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14551 size_t map_length
= info
->size
+ begin
- map_begin
;
14553 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14555 /* Without HAVE_MMAP, we should never be here to begin with. */
14556 gdb_assert_not_reached ("no mmap support");
14561 /* munmap debug sections for OBJFILE, if necessary. */
14564 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14566 struct dwarf2_per_objfile
*data
= d
;
14568 /* This is sorted according to the order they're defined in to make it easier
14569 to keep in sync. */
14570 munmap_section_buffer (&data
->info
);
14571 munmap_section_buffer (&data
->abbrev
);
14572 munmap_section_buffer (&data
->line
);
14573 munmap_section_buffer (&data
->loc
);
14574 munmap_section_buffer (&data
->macinfo
);
14575 munmap_section_buffer (&data
->str
);
14576 munmap_section_buffer (&data
->ranges
);
14577 munmap_section_buffer (&data
->types
);
14578 munmap_section_buffer (&data
->frame
);
14579 munmap_section_buffer (&data
->eh_frame
);
14580 munmap_section_buffer (&data
->gdb_index
);
14585 /* The contents of the hash table we create when building the string
14587 struct strtab_entry
14589 offset_type offset
;
14593 /* Hash function for a strtab_entry. */
14595 hash_strtab_entry (const void *e
)
14597 const struct strtab_entry
*entry
= e
;
14598 return mapped_index_string_hash (entry
->str
);
14601 /* Equality function for a strtab_entry. */
14603 eq_strtab_entry (const void *a
, const void *b
)
14605 const struct strtab_entry
*ea
= a
;
14606 const struct strtab_entry
*eb
= b
;
14607 return !strcmp (ea
->str
, eb
->str
);
14610 /* Create a strtab_entry hash table. */
14612 create_strtab (void)
14614 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
14615 xfree
, xcalloc
, xfree
);
14618 /* Add a string to the constant pool. Return the string's offset in
14621 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
14624 struct strtab_entry entry
;
14625 struct strtab_entry
*result
;
14628 slot
= htab_find_slot (table
, &entry
, INSERT
);
14633 result
= XNEW (struct strtab_entry
);
14634 result
->offset
= obstack_object_size (cpool
);
14636 obstack_grow_str0 (cpool
, str
);
14639 return result
->offset
;
14642 /* An entry in the symbol table. */
14643 struct symtab_index_entry
14645 /* The name of the symbol. */
14647 /* The offset of the name in the constant pool. */
14648 offset_type index_offset
;
14649 /* A sorted vector of the indices of all the CUs that hold an object
14651 VEC (offset_type
) *cu_indices
;
14654 /* The symbol table. This is a power-of-2-sized hash table. */
14655 struct mapped_symtab
14657 offset_type n_elements
;
14659 struct symtab_index_entry
**data
;
14662 /* Hash function for a symtab_index_entry. */
14664 hash_symtab_entry (const void *e
)
14666 const struct symtab_index_entry
*entry
= e
;
14667 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
14668 sizeof (offset_type
) * VEC_length (offset_type
,
14669 entry
->cu_indices
),
14673 /* Equality function for a symtab_index_entry. */
14675 eq_symtab_entry (const void *a
, const void *b
)
14677 const struct symtab_index_entry
*ea
= a
;
14678 const struct symtab_index_entry
*eb
= b
;
14679 int len
= VEC_length (offset_type
, ea
->cu_indices
);
14680 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
14682 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
14683 VEC_address (offset_type
, eb
->cu_indices
),
14684 sizeof (offset_type
) * len
);
14687 /* Destroy a symtab_index_entry. */
14689 delete_symtab_entry (void *p
)
14691 struct symtab_index_entry
*entry
= p
;
14692 VEC_free (offset_type
, entry
->cu_indices
);
14696 /* Create a hash table holding symtab_index_entry objects. */
14698 create_index_table (void)
14700 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
14701 delete_symtab_entry
, xcalloc
, xfree
);
14704 /* Create a new mapped symtab object. */
14705 static struct mapped_symtab
*
14706 create_mapped_symtab (void)
14708 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
14709 symtab
->n_elements
= 0;
14710 symtab
->size
= 1024;
14711 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14715 /* Destroy a mapped_symtab. */
14717 cleanup_mapped_symtab (void *p
)
14719 struct mapped_symtab
*symtab
= p
;
14720 /* The contents of the array are freed when the other hash table is
14722 xfree (symtab
->data
);
14726 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14728 static struct symtab_index_entry
**
14729 find_slot (struct mapped_symtab
*symtab
, const char *name
)
14731 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
14733 index
= hash
& (symtab
->size
- 1);
14734 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
14738 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
14739 return &symtab
->data
[index
];
14740 index
= (index
+ step
) & (symtab
->size
- 1);
14744 /* Expand SYMTAB's hash table. */
14746 hash_expand (struct mapped_symtab
*symtab
)
14748 offset_type old_size
= symtab
->size
;
14750 struct symtab_index_entry
**old_entries
= symtab
->data
;
14753 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14755 for (i
= 0; i
< old_size
; ++i
)
14757 if (old_entries
[i
])
14759 struct symtab_index_entry
**slot
= find_slot (symtab
,
14760 old_entries
[i
]->name
);
14761 *slot
= old_entries
[i
];
14765 xfree (old_entries
);
14768 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14769 is the index of the CU in which the symbol appears. */
14771 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
14772 offset_type cu_index
)
14774 struct symtab_index_entry
**slot
;
14776 ++symtab
->n_elements
;
14777 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
14778 hash_expand (symtab
);
14780 slot
= find_slot (symtab
, name
);
14783 *slot
= XNEW (struct symtab_index_entry
);
14784 (*slot
)->name
= name
;
14785 (*slot
)->cu_indices
= NULL
;
14787 /* Don't push an index twice. Due to how we add entries we only
14788 have to check the last one. */
14789 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
14790 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
14791 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
14794 /* Add a vector of indices to the constant pool. */
14796 add_indices_to_cpool (htab_t index_table
, struct obstack
*cpool
,
14797 struct symtab_index_entry
*entry
)
14801 slot
= htab_find_slot (index_table
, entry
, INSERT
);
14804 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
14805 offset_type val
= MAYBE_SWAP (len
);
14810 entry
->index_offset
= obstack_object_size (cpool
);
14812 obstack_grow (cpool
, &val
, sizeof (val
));
14814 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
14817 val
= MAYBE_SWAP (iter
);
14818 obstack_grow (cpool
, &val
, sizeof (val
));
14823 struct symtab_index_entry
*old_entry
= *slot
;
14824 entry
->index_offset
= old_entry
->index_offset
;
14827 return entry
->index_offset
;
14830 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14831 constant pool entries going into the obstack CPOOL. */
14833 write_hash_table (struct mapped_symtab
*symtab
,
14834 struct obstack
*output
, struct obstack
*cpool
)
14837 htab_t index_table
;
14840 index_table
= create_index_table ();
14841 str_table
= create_strtab ();
14842 /* We add all the index vectors to the constant pool first, to
14843 ensure alignment is ok. */
14844 for (i
= 0; i
< symtab
->size
; ++i
)
14846 if (symtab
->data
[i
])
14847 add_indices_to_cpool (index_table
, cpool
, symtab
->data
[i
]);
14850 /* Now write out the hash table. */
14851 for (i
= 0; i
< symtab
->size
; ++i
)
14853 offset_type str_off
, vec_off
;
14855 if (symtab
->data
[i
])
14857 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
14858 vec_off
= symtab
->data
[i
]->index_offset
;
14862 /* While 0 is a valid constant pool index, it is not valid
14863 to have 0 for both offsets. */
14868 str_off
= MAYBE_SWAP (str_off
);
14869 vec_off
= MAYBE_SWAP (vec_off
);
14871 obstack_grow (output
, &str_off
, sizeof (str_off
));
14872 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
14875 htab_delete (str_table
);
14876 htab_delete (index_table
);
14879 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14880 from PST; CU_INDEX is the index of the CU in the vector of all
14883 add_address_entry (struct objfile
*objfile
,
14884 struct obstack
*addr_obstack
, struct partial_symtab
*pst
,
14885 unsigned int cu_index
)
14887 offset_type offset
;
14889 CORE_ADDR baseaddr
;
14891 /* Don't bother recording empty ranges. */
14892 if (pst
->textlow
== pst
->texthigh
)
14895 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14897 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->textlow
- baseaddr
);
14898 obstack_grow (addr_obstack
, addr
, 8);
14899 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->texthigh
- baseaddr
);
14900 obstack_grow (addr_obstack
, addr
, 8);
14901 offset
= MAYBE_SWAP (cu_index
);
14902 obstack_grow (addr_obstack
, &offset
, sizeof (offset_type
));
14905 /* Add a list of partial symbols to SYMTAB. */
14907 write_psymbols (struct mapped_symtab
*symtab
,
14908 struct partial_symbol
**psymp
,
14910 offset_type cu_index
)
14912 for (; count
-- > 0; ++psymp
)
14914 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
14915 error (_("Ada is not currently supported by the index"));
14916 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
14920 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14921 exception if there is an error. */
14923 write_obstack (FILE *file
, struct obstack
*obstack
)
14925 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
14927 != obstack_object_size (obstack
))
14928 error (_("couldn't data write to file"));
14931 /* Unlink a file if the argument is not NULL. */
14933 unlink_if_set (void *p
)
14935 char **filename
= p
;
14937 unlink (*filename
);
14940 /* A helper struct used when iterating over debug_types. */
14941 struct signatured_type_index_data
14943 struct objfile
*objfile
;
14944 struct mapped_symtab
*symtab
;
14945 struct obstack
*types_list
;
14949 /* A helper function that writes a single signatured_type to an
14952 write_one_signatured_type (void **slot
, void *d
)
14954 struct signatured_type_index_data
*info
= d
;
14955 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
14956 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
14957 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
14960 write_psymbols (info
->symtab
,
14961 info
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
14962 psymtab
->n_global_syms
, info
->cu_index
);
14963 write_psymbols (info
->symtab
,
14964 info
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
14965 psymtab
->n_static_syms
, info
->cu_index
);
14967 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
14968 obstack_grow (info
->types_list
, val
, 8);
14969 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
14970 obstack_grow (info
->types_list
, val
, 8);
14971 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
14972 obstack_grow (info
->types_list
, val
, 8);
14979 /* Create an index file for OBJFILE in the directory DIR. */
14981 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
14983 struct cleanup
*cleanup
;
14984 char *filename
, *cleanup_filename
;
14985 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
14986 struct obstack cu_list
, types_cu_list
;
14989 struct mapped_symtab
*symtab
;
14990 offset_type val
, size_of_contents
, total_len
;
14994 if (!objfile
->psymtabs
)
14996 if (dwarf2_per_objfile
->using_index
)
14997 error (_("Cannot use an index to create the index"));
14999 if (stat (objfile
->name
, &st
) < 0)
15000 perror_with_name (_("Could not stat"));
15002 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15003 INDEX_SUFFIX
, (char *) NULL
);
15004 cleanup
= make_cleanup (xfree
, filename
);
15006 out_file
= fopen (filename
, "wb");
15008 error (_("Can't open `%s' for writing"), filename
);
15010 cleanup_filename
= filename
;
15011 make_cleanup (unlink_if_set
, &cleanup_filename
);
15013 symtab
= create_mapped_symtab ();
15014 make_cleanup (cleanup_mapped_symtab
, symtab
);
15016 obstack_init (&addr_obstack
);
15017 make_cleanup_obstack_free (&addr_obstack
);
15019 obstack_init (&cu_list
);
15020 make_cleanup_obstack_free (&cu_list
);
15022 obstack_init (&types_cu_list
);
15023 make_cleanup_obstack_free (&types_cu_list
);
15025 /* The list is already sorted, so we don't need to do additional
15026 work here. Also, the debug_types entries do not appear in
15027 all_comp_units, but only in their own hash table. */
15028 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15030 struct dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->all_comp_units
[i
];
15031 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15034 write_psymbols (symtab
,
15035 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15036 psymtab
->n_global_syms
, i
);
15037 write_psymbols (symtab
,
15038 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15039 psymtab
->n_static_syms
, i
);
15041 add_address_entry (objfile
, &addr_obstack
, psymtab
, i
);
15043 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15044 obstack_grow (&cu_list
, val
, 8);
15045 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15046 obstack_grow (&cu_list
, val
, 8);
15049 /* Write out the .debug_type entries, if any. */
15050 if (dwarf2_per_objfile
->signatured_types
)
15052 struct signatured_type_index_data sig_data
;
15054 sig_data
.objfile
= objfile
;
15055 sig_data
.symtab
= symtab
;
15056 sig_data
.types_list
= &types_cu_list
;
15057 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15058 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15059 write_one_signatured_type
, &sig_data
);
15062 obstack_init (&constant_pool
);
15063 make_cleanup_obstack_free (&constant_pool
);
15064 obstack_init (&symtab_obstack
);
15065 make_cleanup_obstack_free (&symtab_obstack
);
15066 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15068 obstack_init (&contents
);
15069 make_cleanup_obstack_free (&contents
);
15070 size_of_contents
= 6 * sizeof (offset_type
);
15071 total_len
= size_of_contents
;
15073 /* The version number. */
15074 val
= MAYBE_SWAP (2);
15075 obstack_grow (&contents
, &val
, sizeof (val
));
15077 /* The offset of the CU list from the start of the file. */
15078 val
= MAYBE_SWAP (total_len
);
15079 obstack_grow (&contents
, &val
, sizeof (val
));
15080 total_len
+= obstack_object_size (&cu_list
);
15082 /* The offset of the types CU list from the start of the file. */
15083 val
= MAYBE_SWAP (total_len
);
15084 obstack_grow (&contents
, &val
, sizeof (val
));
15085 total_len
+= obstack_object_size (&types_cu_list
);
15087 /* The offset of the address table from the start of the file. */
15088 val
= MAYBE_SWAP (total_len
);
15089 obstack_grow (&contents
, &val
, sizeof (val
));
15090 total_len
+= obstack_object_size (&addr_obstack
);
15092 /* The offset of the symbol table from the start of the file. */
15093 val
= MAYBE_SWAP (total_len
);
15094 obstack_grow (&contents
, &val
, sizeof (val
));
15095 total_len
+= obstack_object_size (&symtab_obstack
);
15097 /* The offset of the constant pool from the start of the file. */
15098 val
= MAYBE_SWAP (total_len
);
15099 obstack_grow (&contents
, &val
, sizeof (val
));
15100 total_len
+= obstack_object_size (&constant_pool
);
15102 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15104 write_obstack (out_file
, &contents
);
15105 write_obstack (out_file
, &cu_list
);
15106 write_obstack (out_file
, &types_cu_list
);
15107 write_obstack (out_file
, &addr_obstack
);
15108 write_obstack (out_file
, &symtab_obstack
);
15109 write_obstack (out_file
, &constant_pool
);
15113 /* We want to keep the file, so we set cleanup_filename to NULL
15114 here. See unlink_if_set. */
15115 cleanup_filename
= NULL
;
15117 do_cleanups (cleanup
);
15120 /* The mapped index file format is designed to be directly mmap()able
15121 on any architecture. In most cases, a datum is represented using a
15122 little-endian 32-bit integer value, called an offset_type. Big
15123 endian machines must byte-swap the values before using them.
15124 Exceptions to this rule are noted. The data is laid out such that
15125 alignment is always respected.
15127 A mapped index consists of several sections.
15129 1. The file header. This is a sequence of values, of offset_type
15130 unless otherwise noted:
15131 [0] The version number. Currently 1 or 2. The differences are
15132 noted below. Version 1 did not account for .debug_types sections;
15133 the presence of a .debug_types section invalidates any version 1
15134 index that may exist.
15135 [1] The offset, from the start of the file, of the CU list.
15136 [1.5] In version 2, the offset, from the start of the file, of the
15137 types CU list. This offset does not appear in version 1. Note
15138 that this can be empty, in which case this offset will be equal to
15140 [2] The offset, from the start of the file, of the address section.
15141 [3] The offset, from the start of the file, of the symbol table.
15142 [4] The offset, from the start of the file, of the constant pool.
15144 2. The CU list. This is a sequence of pairs of 64-bit
15145 little-endian values, sorted by the CU offset. The first element
15146 in each pair is the offset of a CU in the .debug_info section. The
15147 second element in each pair is the length of that CU. References
15148 to a CU elsewhere in the map are done using a CU index, which is
15149 just the 0-based index into this table. Note that if there are
15150 type CUs, then conceptually CUs and type CUs form a single list for
15151 the purposes of CU indices.
15153 2.5 The types CU list. This does not appear in a version 1 index.
15154 This is a sequence of triplets of 64-bit little-endian values. In
15155 a triplet, the first value is the CU offset, the second value is
15156 the type offset in the CU, and the third value is the type
15157 signature. The types CU list is not sorted.
15159 3. The address section. The address section consists of a sequence
15160 of address entries. Each address entry has three elements.
15161 [0] The low address. This is a 64-bit little-endian value.
15162 [1] The high address. This is a 64-bit little-endian value.
15163 [2] The CU index. This is an offset_type value.
15165 4. The symbol table. This is a hash table. The size of the hash
15166 table is always a power of 2. The initial hash and the step are
15167 currently defined by the `find_slot' function.
15169 Each slot in the hash table consists of a pair of offset_type
15170 values. The first value is the offset of the symbol's name in the
15171 constant pool. The second value is the offset of the CU vector in
15174 If both values are 0, then this slot in the hash table is empty.
15175 This is ok because while 0 is a valid constant pool index, it
15176 cannot be a valid index for both a string and a CU vector.
15178 A string in the constant pool is stored as a \0-terminated string,
15181 A CU vector in the constant pool is a sequence of offset_type
15182 values. The first value is the number of CU indices in the vector.
15183 Each subsequent value is the index of a CU in the CU list. This
15184 element in the hash table is used to indicate which CUs define the
15187 5. The constant pool. This is simply a bunch of bytes. It is
15188 organized so that alignment is correct: CU vectors are stored
15189 first, followed by strings. */
15191 save_gdb_index_command (char *arg
, int from_tty
)
15193 struct objfile
*objfile
;
15196 error (_("usage: save gdb-index DIRECTORY"));
15198 ALL_OBJFILES (objfile
)
15202 /* If the objfile does not correspond to an actual file, skip it. */
15203 if (stat (objfile
->name
, &st
) < 0)
15206 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15207 if (dwarf2_per_objfile
)
15209 volatile struct gdb_exception except
;
15211 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15213 write_psymtabs_to_index (objfile
, arg
);
15215 if (except
.reason
< 0)
15216 exception_fprintf (gdb_stderr
, except
,
15217 _("Error while writing index for `%s': "),
15225 int dwarf2_always_disassemble
;
15228 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15229 struct cmd_list_element
*c
, const char *value
)
15231 fprintf_filtered (file
, _("\
15232 Whether to always disassemble DWARF expressions is %s.\n"),
15236 void _initialize_dwarf2_read (void);
15239 _initialize_dwarf2_read (void)
15241 struct cmd_list_element
*c
;
15243 dwarf2_objfile_data_key
15244 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15246 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15247 Set DWARF 2 specific variables.\n\
15248 Configure DWARF 2 variables such as the cache size"),
15249 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15250 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15252 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15253 Show DWARF 2 specific variables\n\
15254 Show DWARF 2 variables such as the cache size"),
15255 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15256 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15258 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15259 &dwarf2_max_cache_age
, _("\
15260 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15261 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15262 A higher limit means that cached compilation units will be stored\n\
15263 in memory longer, and more total memory will be used. Zero disables\n\
15264 caching, which can slow down startup."),
15266 show_dwarf2_max_cache_age
,
15267 &set_dwarf2_cmdlist
,
15268 &show_dwarf2_cmdlist
);
15270 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15271 &dwarf2_always_disassemble
, _("\
15272 Set whether `info address' always disassembles DWARF expressions."), _("\
15273 Show whether `info address' always disassembles DWARF expressions."), _("\
15274 When enabled, DWARF expressions are always printed in an assembly-like\n\
15275 syntax. When disabled, expressions will be printed in a more\n\
15276 conversational style, when possible."),
15278 show_dwarf2_always_disassemble
,
15279 &set_dwarf2_cmdlist
,
15280 &show_dwarf2_cmdlist
);
15282 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15283 Set debugging of the dwarf2 DIE reader."), _("\
15284 Show debugging of the dwarf2 DIE reader."), _("\
15285 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15286 The value is the maximum depth to print."),
15289 &setdebuglist
, &showdebuglist
);
15291 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15292 _("Save a .gdb-index file"),
15294 set_cmd_completer (c
, filename_completer
);