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"
56 #include "gdb_string.h"
57 #include "gdb_assert.h"
58 #include <sys/types.h>
65 #define MAP_FAILED ((void *) -1)
70 /* .debug_info header for a compilation unit
71 Because of alignment constraints, this structure has padding and cannot
72 be mapped directly onto the beginning of the .debug_info section. */
73 typedef struct comp_unit_header
75 unsigned int length
; /* length of the .debug_info
77 unsigned short version
; /* version number -- 2 for DWARF
79 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
80 unsigned char addr_size
; /* byte size of an address -- 4 */
83 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
86 /* .debug_line statement program prologue
87 Because of alignment constraints, this structure has padding and cannot
88 be mapped directly onto the beginning of the .debug_info section. */
89 typedef struct statement_prologue
91 unsigned int total_length
; /* byte length of the statement
93 unsigned short version
; /* version number -- 2 for DWARF
95 unsigned int prologue_length
; /* # bytes between prologue &
97 unsigned char minimum_instruction_length
; /* byte size of
99 unsigned char default_is_stmt
; /* initial value of is_stmt
102 unsigned char line_range
;
103 unsigned char opcode_base
; /* number assigned to first special
105 unsigned char *standard_opcode_lengths
;
109 /* When non-zero, dump DIEs after they are read in. */
110 static int dwarf2_die_debug
= 0;
114 /* When set, the file that we're processing is known to have debugging
115 info for C++ namespaces. GCC 3.3.x did not produce this information,
116 but later versions do. */
118 static int processing_has_namespace_info
;
120 static const struct objfile_data
*dwarf2_objfile_data_key
;
122 struct dwarf2_section_info
128 /* True if we have tried to read this section. */
132 struct dwarf2_per_objfile
134 struct dwarf2_section_info info
;
135 struct dwarf2_section_info abbrev
;
136 struct dwarf2_section_info line
;
137 struct dwarf2_section_info loc
;
138 struct dwarf2_section_info macinfo
;
139 struct dwarf2_section_info str
;
140 struct dwarf2_section_info ranges
;
141 struct dwarf2_section_info types
;
142 struct dwarf2_section_info frame
;
143 struct dwarf2_section_info eh_frame
;
146 struct objfile
*objfile
;
148 /* A list of all the compilation units. This is used to locate
149 the target compilation unit of a particular reference. */
150 struct dwarf2_per_cu_data
**all_comp_units
;
152 /* The number of compilation units in ALL_COMP_UNITS. */
155 /* A chain of compilation units that are currently read in, so that
156 they can be freed later. */
157 struct dwarf2_per_cu_data
*read_in_chain
;
159 /* A table mapping .debug_types signatures to its signatured_type entry.
160 This is NULL if the .debug_types section hasn't been read in yet. */
161 htab_t signatured_types
;
163 /* A flag indicating wether this objfile has a section loaded at a
165 int has_section_at_zero
;
168 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
170 /* names of the debugging sections */
172 /* Note that if the debugging section has been compressed, it might
173 have a name like .zdebug_info. */
175 #define INFO_SECTION "debug_info"
176 #define ABBREV_SECTION "debug_abbrev"
177 #define LINE_SECTION "debug_line"
178 #define LOC_SECTION "debug_loc"
179 #define MACINFO_SECTION "debug_macinfo"
180 #define STR_SECTION "debug_str"
181 #define RANGES_SECTION "debug_ranges"
182 #define TYPES_SECTION "debug_types"
183 #define FRAME_SECTION "debug_frame"
184 #define EH_FRAME_SECTION "eh_frame"
186 /* local data types */
188 /* We hold several abbreviation tables in memory at the same time. */
189 #ifndef ABBREV_HASH_SIZE
190 #define ABBREV_HASH_SIZE 121
193 /* The data in a compilation unit header, after target2host
194 translation, looks like this. */
195 struct comp_unit_head
199 unsigned char addr_size
;
200 unsigned char signed_addr_p
;
201 unsigned int abbrev_offset
;
203 /* Size of file offsets; either 4 or 8. */
204 unsigned int offset_size
;
206 /* Size of the length field; either 4 or 12. */
207 unsigned int initial_length_size
;
209 /* Offset to the first byte of this compilation unit header in the
210 .debug_info section, for resolving relative reference dies. */
213 /* Offset to first die in this cu from the start of the cu.
214 This will be the first byte following the compilation unit header. */
215 unsigned int first_die_offset
;
218 /* Internal state when decoding a particular compilation unit. */
221 /* The objfile containing this compilation unit. */
222 struct objfile
*objfile
;
224 /* The header of the compilation unit. */
225 struct comp_unit_head header
;
227 /* Base address of this compilation unit. */
228 CORE_ADDR base_address
;
230 /* Non-zero if base_address has been set. */
233 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
235 /* The language we are debugging. */
236 enum language language
;
237 const struct language_defn
*language_defn
;
239 const char *producer
;
241 /* The generic symbol table building routines have separate lists for
242 file scope symbols and all all other scopes (local scopes). So
243 we need to select the right one to pass to add_symbol_to_list().
244 We do it by keeping a pointer to the correct list in list_in_scope.
246 FIXME: The original dwarf code just treated the file scope as the
247 first local scope, and all other local scopes as nested local
248 scopes, and worked fine. Check to see if we really need to
249 distinguish these in buildsym.c. */
250 struct pending
**list_in_scope
;
252 /* DWARF abbreviation table associated with this compilation unit. */
253 struct abbrev_info
**dwarf2_abbrevs
;
255 /* Storage for the abbrev table. */
256 struct obstack abbrev_obstack
;
258 /* Hash table holding all the loaded partial DIEs. */
261 /* Storage for things with the same lifetime as this read-in compilation
262 unit, including partial DIEs. */
263 struct obstack comp_unit_obstack
;
265 /* When multiple dwarf2_cu structures are living in memory, this field
266 chains them all together, so that they can be released efficiently.
267 We will probably also want a generation counter so that most-recently-used
268 compilation units are cached... */
269 struct dwarf2_per_cu_data
*read_in_chain
;
271 /* Backchain to our per_cu entry if the tree has been built. */
272 struct dwarf2_per_cu_data
*per_cu
;
274 /* Pointer to the die -> type map. Although it is stored
275 permanently in per_cu, we copy it here to avoid double
279 /* How many compilation units ago was this CU last referenced? */
282 /* A hash table of die offsets for following references. */
285 /* Full DIEs if read in. */
286 struct die_info
*dies
;
288 /* A set of pointers to dwarf2_per_cu_data objects for compilation
289 units referenced by this one. Only set during full symbol processing;
290 partial symbol tables do not have dependencies. */
293 /* Header data from the line table, during full symbol processing. */
294 struct line_header
*line_header
;
296 /* Mark used when releasing cached dies. */
297 unsigned int mark
: 1;
299 /* This flag will be set if this compilation unit might include
300 inter-compilation-unit references. */
301 unsigned int has_form_ref_addr
: 1;
303 /* This flag will be set if this compilation unit includes any
304 DW_TAG_namespace DIEs. If we know that there are explicit
305 DIEs for namespaces, we don't need to try to infer them
306 from mangled names. */
307 unsigned int has_namespace_info
: 1;
310 /* Persistent data held for a compilation unit, even when not
311 processing it. We put a pointer to this structure in the
312 read_symtab_private field of the psymtab. If we encounter
313 inter-compilation-unit references, we also maintain a sorted
314 list of all compilation units. */
316 struct dwarf2_per_cu_data
318 /* The start offset and length of this compilation unit. 2**29-1
319 bytes should suffice to store the length of any compilation unit
320 - if it doesn't, GDB will fall over anyway.
321 NOTE: Unlike comp_unit_head.length, this length includes
322 initial_length_size. */
324 unsigned int length
: 29;
326 /* Flag indicating this compilation unit will be read in before
327 any of the current compilation units are processed. */
328 unsigned int queued
: 1;
330 /* This flag will be set if we need to load absolutely all DIEs
331 for this compilation unit, instead of just the ones we think
332 are interesting. It gets set if we look for a DIE in the
333 hash table and don't find it. */
334 unsigned int load_all_dies
: 1;
336 /* Non-zero if this CU is from .debug_types.
337 Otherwise it's from .debug_info. */
338 unsigned int from_debug_types
: 1;
340 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
341 of the CU cache it gets reset to NULL again. */
342 struct dwarf2_cu
*cu
;
344 /* If full symbols for this CU have been read in, then this field
345 holds a map of DIE offsets to types. It isn't always possible
346 to reconstruct this information later, so we have to preserve
350 /* The partial symbol table associated with this compilation unit,
351 or NULL for partial units (which do not have an associated
353 struct partial_symtab
*psymtab
;
356 /* Entry in the signatured_types hash table. */
358 struct signatured_type
362 /* Offset in .debug_types of the TU (type_unit) for this type. */
365 /* Offset in .debug_types of the type defined by this TU. */
366 unsigned int type_offset
;
368 /* The CU(/TU) of this type. */
369 struct dwarf2_per_cu_data per_cu
;
372 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
373 which are used for both .debug_info and .debug_types dies.
374 All parameters here are unchanging for the life of the call.
375 This struct exists to abstract away the constant parameters of
378 struct die_reader_specs
380 /* The bfd of this objfile. */
383 /* The CU of the DIE we are parsing. */
384 struct dwarf2_cu
*cu
;
386 /* Pointer to start of section buffer.
387 This is either the start of .debug_info or .debug_types. */
388 const gdb_byte
*buffer
;
391 /* The line number information for a compilation unit (found in the
392 .debug_line section) begins with a "statement program header",
393 which contains the following information. */
396 unsigned int total_length
;
397 unsigned short version
;
398 unsigned int header_length
;
399 unsigned char minimum_instruction_length
;
400 unsigned char maximum_ops_per_instruction
;
401 unsigned char default_is_stmt
;
403 unsigned char line_range
;
404 unsigned char opcode_base
;
406 /* standard_opcode_lengths[i] is the number of operands for the
407 standard opcode whose value is i. This means that
408 standard_opcode_lengths[0] is unused, and the last meaningful
409 element is standard_opcode_lengths[opcode_base - 1]. */
410 unsigned char *standard_opcode_lengths
;
412 /* The include_directories table. NOTE! These strings are not
413 allocated with xmalloc; instead, they are pointers into
414 debug_line_buffer. If you try to free them, `free' will get
416 unsigned int num_include_dirs
, include_dirs_size
;
419 /* The file_names table. NOTE! These strings are not allocated
420 with xmalloc; instead, they are pointers into debug_line_buffer.
421 Don't try to free them directly. */
422 unsigned int num_file_names
, file_names_size
;
426 unsigned int dir_index
;
427 unsigned int mod_time
;
429 int included_p
; /* Non-zero if referenced by the Line Number Program. */
430 struct symtab
*symtab
; /* The associated symbol table, if any. */
433 /* The start and end of the statement program following this
434 header. These point into dwarf2_per_objfile->line_buffer. */
435 gdb_byte
*statement_program_start
, *statement_program_end
;
438 /* When we construct a partial symbol table entry we only
439 need this much information. */
440 struct partial_die_info
442 /* Offset of this DIE. */
445 /* DWARF-2 tag for this DIE. */
446 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
448 /* Assorted flags describing the data found in this DIE. */
449 unsigned int has_children
: 1;
450 unsigned int is_external
: 1;
451 unsigned int is_declaration
: 1;
452 unsigned int has_type
: 1;
453 unsigned int has_specification
: 1;
454 unsigned int has_pc_info
: 1;
456 /* Flag set if the SCOPE field of this structure has been
458 unsigned int scope_set
: 1;
460 /* Flag set if the DIE has a byte_size attribute. */
461 unsigned int has_byte_size
: 1;
463 /* The name of this DIE. Normally the value of DW_AT_name, but
464 sometimes a default name for unnamed DIEs. */
467 /* The scope to prepend to our children. This is generally
468 allocated on the comp_unit_obstack, so will disappear
469 when this compilation unit leaves the cache. */
472 /* The location description associated with this DIE, if any. */
473 struct dwarf_block
*locdesc
;
475 /* If HAS_PC_INFO, the PC range associated with this DIE. */
479 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
480 DW_AT_sibling, if any. */
483 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
484 DW_AT_specification (or DW_AT_abstract_origin or
486 unsigned int spec_offset
;
488 /* Pointers to this DIE's parent, first child, and next sibling,
490 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
493 /* This data structure holds the information of an abbrev. */
496 unsigned int number
; /* number identifying abbrev */
497 enum dwarf_tag tag
; /* dwarf tag */
498 unsigned short has_children
; /* boolean */
499 unsigned short num_attrs
; /* number of attributes */
500 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
501 struct abbrev_info
*next
; /* next in chain */
506 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
507 ENUM_BITFIELD(dwarf_form
) form
: 16;
510 /* Attributes have a name and a value */
513 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
514 ENUM_BITFIELD(dwarf_form
) form
: 15;
516 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
517 field should be in u.str (existing only for DW_STRING) but it is kept
518 here for better struct attribute alignment. */
519 unsigned int string_is_canonical
: 1;
524 struct dwarf_block
*blk
;
528 struct signatured_type
*signatured_type
;
533 /* This data structure holds a complete die structure. */
536 /* DWARF-2 tag for this DIE. */
537 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
539 /* Number of attributes */
540 unsigned short num_attrs
;
545 /* Offset in .debug_info or .debug_types section. */
548 /* The dies in a compilation unit form an n-ary tree. PARENT
549 points to this die's parent; CHILD points to the first child of
550 this node; and all the children of a given node are chained
551 together via their SIBLING fields, terminated by a die whose
553 struct die_info
*child
; /* Its first child, if any. */
554 struct die_info
*sibling
; /* Its next sibling, if any. */
555 struct die_info
*parent
; /* Its parent, if any. */
557 /* An array of attributes, with NUM_ATTRS elements. There may be
558 zero, but it's not common and zero-sized arrays are not
559 sufficiently portable C. */
560 struct attribute attrs
[1];
563 struct function_range
566 CORE_ADDR lowpc
, highpc
;
568 struct function_range
*next
;
571 /* Get at parts of an attribute structure */
573 #define DW_STRING(attr) ((attr)->u.str)
574 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
575 #define DW_UNSND(attr) ((attr)->u.unsnd)
576 #define DW_BLOCK(attr) ((attr)->u.blk)
577 #define DW_SND(attr) ((attr)->u.snd)
578 #define DW_ADDR(attr) ((attr)->u.addr)
579 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
581 /* Blocks are a bunch of untyped bytes. */
588 #ifndef ATTR_ALLOC_CHUNK
589 #define ATTR_ALLOC_CHUNK 4
592 /* Allocate fields for structs, unions and enums in this size. */
593 #ifndef DW_FIELD_ALLOC_CHUNK
594 #define DW_FIELD_ALLOC_CHUNK 4
597 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
598 but this would require a corresponding change in unpack_field_as_long
600 static int bits_per_byte
= 8;
602 /* The routines that read and process dies for a C struct or C++ class
603 pass lists of data member fields and lists of member function fields
604 in an instance of a field_info structure, as defined below. */
607 /* List of data member and baseclasses fields. */
610 struct nextfield
*next
;
615 *fields
, *baseclasses
;
617 /* Number of fields (including baseclasses). */
620 /* Number of baseclasses. */
623 /* Set if the accesibility of one of the fields is not public. */
624 int non_public_fields
;
626 /* Member function fields array, entries are allocated in the order they
627 are encountered in the object file. */
630 struct nextfnfield
*next
;
631 struct fn_field fnfield
;
635 /* Member function fieldlist array, contains name of possibly overloaded
636 member function, number of overloaded member functions and a pointer
637 to the head of the member function field chain. */
642 struct nextfnfield
*head
;
646 /* Number of entries in the fnfieldlists array. */
649 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
650 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
651 struct typedef_field_list
653 struct typedef_field field
;
654 struct typedef_field_list
*next
;
657 unsigned typedef_field_list_count
;
660 /* One item on the queue of compilation units to read in full symbols
662 struct dwarf2_queue_item
664 struct dwarf2_per_cu_data
*per_cu
;
665 struct dwarf2_queue_item
*next
;
668 /* The current queue. */
669 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
671 /* Loaded secondary compilation units are kept in memory until they
672 have not been referenced for the processing of this many
673 compilation units. Set this to zero to disable caching. Cache
674 sizes of up to at least twenty will improve startup time for
675 typical inter-CU-reference binaries, at an obvious memory cost. */
676 static int dwarf2_max_cache_age
= 5;
678 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
679 struct cmd_list_element
*c
, const char *value
)
681 fprintf_filtered (file
, _("\
682 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
687 /* Various complaints about symbol reading that don't abort the process */
690 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
692 complaint (&symfile_complaints
,
693 _("statement list doesn't fit in .debug_line section"));
697 dwarf2_debug_line_missing_file_complaint (void)
699 complaint (&symfile_complaints
,
700 _(".debug_line section has line data without a file"));
704 dwarf2_debug_line_missing_end_sequence_complaint (void)
706 complaint (&symfile_complaints
,
707 _(".debug_line section has line program sequence without an end"));
711 dwarf2_complex_location_expr_complaint (void)
713 complaint (&symfile_complaints
, _("location expression too complex"));
717 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
720 complaint (&symfile_complaints
,
721 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
726 dwarf2_macros_too_long_complaint (void)
728 complaint (&symfile_complaints
,
729 _("macro info runs off end of `.debug_macinfo' section"));
733 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
735 complaint (&symfile_complaints
,
736 _("macro debug info contains a malformed macro definition:\n`%s'"),
741 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
743 complaint (&symfile_complaints
,
744 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
747 /* local function prototypes */
749 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
751 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
754 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
756 struct partial_symtab
*);
758 static void dwarf2_build_psymtabs_hard (struct objfile
*);
760 static void scan_partial_symbols (struct partial_die_info
*,
761 CORE_ADDR
*, CORE_ADDR
*,
762 int, struct dwarf2_cu
*);
764 static void add_partial_symbol (struct partial_die_info
*,
767 static void add_partial_namespace (struct partial_die_info
*pdi
,
768 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
769 int need_pc
, struct dwarf2_cu
*cu
);
771 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
772 CORE_ADDR
*highpc
, int need_pc
,
773 struct dwarf2_cu
*cu
);
775 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
776 struct dwarf2_cu
*cu
);
778 static void add_partial_subprogram (struct partial_die_info
*pdi
,
779 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
780 int need_pc
, struct dwarf2_cu
*cu
);
782 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
783 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
784 bfd
*abfd
, struct dwarf2_cu
*cu
);
786 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
788 static void psymtab_to_symtab_1 (struct partial_symtab
*);
790 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
792 static void dwarf2_free_abbrev_table (void *);
794 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
797 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
800 static struct partial_die_info
*load_partial_dies (bfd
*,
801 gdb_byte
*, gdb_byte
*,
802 int, struct dwarf2_cu
*);
804 static gdb_byte
*read_partial_die (struct partial_die_info
*,
805 struct abbrev_info
*abbrev
,
807 gdb_byte
*, gdb_byte
*,
810 static struct partial_die_info
*find_partial_die (unsigned int,
813 static void fixup_partial_die (struct partial_die_info
*,
816 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
817 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
819 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
820 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
822 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
824 static int read_1_signed_byte (bfd
*, gdb_byte
*);
826 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
828 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
830 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
832 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
835 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
837 static LONGEST read_checked_initial_length_and_offset
838 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
839 unsigned int *, unsigned int *);
841 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
844 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
846 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
848 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
850 static char *read_indirect_string (bfd
*, gdb_byte
*,
851 const struct comp_unit_head
*,
854 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
856 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
858 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
860 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
862 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
865 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
869 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
870 struct dwarf2_cu
*cu
);
872 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
874 static struct die_info
*die_specification (struct die_info
*die
,
875 struct dwarf2_cu
**);
877 static void free_line_header (struct line_header
*lh
);
879 static void add_file_name (struct line_header
*, char *, unsigned int,
880 unsigned int, unsigned int);
882 static struct line_header
*(dwarf_decode_line_header
883 (unsigned int offset
,
884 bfd
*abfd
, struct dwarf2_cu
*cu
));
886 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
887 struct dwarf2_cu
*, struct partial_symtab
*);
889 static void dwarf2_start_subfile (char *, char *, char *);
891 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
894 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
897 static void dwarf2_const_value_data (struct attribute
*attr
,
901 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
903 static int need_gnat_info (struct dwarf2_cu
*);
905 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
907 static void set_descriptive_type (struct type
*, struct die_info
*,
910 static struct type
*die_containing_type (struct die_info
*,
913 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
915 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
917 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
919 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
920 const char *suffix
, int physname
,
921 struct dwarf2_cu
*cu
);
923 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
925 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
927 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
929 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
931 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
932 struct dwarf2_cu
*, struct partial_symtab
*);
934 static int dwarf2_get_pc_bounds (struct die_info
*,
935 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
936 struct partial_symtab
*);
938 static void get_scope_pc_bounds (struct die_info
*,
939 CORE_ADDR
*, CORE_ADDR
*,
942 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
943 CORE_ADDR
, struct dwarf2_cu
*);
945 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
948 static void dwarf2_attach_fields_to_type (struct field_info
*,
949 struct type
*, struct dwarf2_cu
*);
951 static void dwarf2_add_member_fn (struct field_info
*,
952 struct die_info
*, struct type
*,
955 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
956 struct type
*, struct dwarf2_cu
*);
958 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
960 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
962 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
964 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
966 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
968 static struct type
*read_module_type (struct die_info
*die
,
969 struct dwarf2_cu
*cu
);
971 static const char *namespace_name (struct die_info
*die
,
972 int *is_anonymous
, struct dwarf2_cu
*);
974 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
976 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
978 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
981 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
983 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
985 gdb_byte
**new_info_ptr
,
986 struct die_info
*parent
);
988 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
990 gdb_byte
**new_info_ptr
,
991 struct die_info
*parent
);
993 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
995 gdb_byte
**new_info_ptr
,
996 struct die_info
*parent
);
998 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
999 struct die_info
**, gdb_byte
*,
1002 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1004 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1007 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1009 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1010 struct dwarf2_cu
**);
1012 static char *dwarf_tag_name (unsigned int);
1014 static char *dwarf_attr_name (unsigned int);
1016 static char *dwarf_form_name (unsigned int);
1018 static char *dwarf_bool_name (unsigned int);
1020 static char *dwarf_type_encoding_name (unsigned int);
1023 static char *dwarf_cfi_name (unsigned int);
1026 static struct die_info
*sibling_die (struct die_info
*);
1028 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1030 static void dump_die_for_error (struct die_info
*);
1032 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1035 /*static*/ void dump_die (struct die_info
*, int max_level
);
1037 static void store_in_ref_table (struct die_info
*,
1038 struct dwarf2_cu
*);
1040 static int is_ref_attr (struct attribute
*);
1042 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1044 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1046 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1048 struct dwarf2_cu
**);
1050 static struct die_info
*follow_die_ref (struct die_info
*,
1052 struct dwarf2_cu
**);
1054 static struct die_info
*follow_die_sig (struct die_info
*,
1056 struct dwarf2_cu
**);
1058 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1059 unsigned int offset
);
1061 static void read_signatured_type (struct objfile
*,
1062 struct signatured_type
*type_sig
);
1064 /* memory allocation interface */
1066 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1068 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1070 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1072 static void initialize_cu_func_list (struct dwarf2_cu
*);
1074 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1075 struct dwarf2_cu
*);
1077 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1078 char *, bfd
*, struct dwarf2_cu
*);
1080 static int attr_form_is_block (struct attribute
*);
1082 static int attr_form_is_section_offset (struct attribute
*);
1084 static int attr_form_is_constant (struct attribute
*);
1086 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1088 struct dwarf2_cu
*cu
);
1090 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1091 struct abbrev_info
*abbrev
,
1092 struct dwarf2_cu
*cu
);
1094 static void free_stack_comp_unit (void *);
1096 static hashval_t
partial_die_hash (const void *item
);
1098 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1100 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1101 (unsigned int offset
, struct objfile
*objfile
);
1103 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1104 (unsigned int offset
, struct objfile
*objfile
);
1106 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1108 static void free_one_comp_unit (void *);
1110 static void free_cached_comp_units (void *);
1112 static void age_cached_comp_units (void);
1114 static void free_one_cached_comp_unit (void *);
1116 static struct type
*set_die_type (struct die_info
*, struct type
*,
1117 struct dwarf2_cu
*);
1119 static void create_all_comp_units (struct objfile
*);
1121 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1124 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1126 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1127 struct dwarf2_per_cu_data
*);
1129 static void dwarf2_mark (struct dwarf2_cu
*);
1131 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1133 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1135 /* Try to locate the sections we need for DWARF 2 debugging
1136 information and return true if we have enough to do something. */
1139 dwarf2_has_info (struct objfile
*objfile
)
1141 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1142 if (!dwarf2_per_objfile
)
1144 /* Initialize per-objfile state. */
1145 struct dwarf2_per_objfile
*data
1146 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1148 memset (data
, 0, sizeof (*data
));
1149 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1150 dwarf2_per_objfile
= data
;
1152 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1153 dwarf2_per_objfile
->objfile
= objfile
;
1155 return (dwarf2_per_objfile
->info
.asection
!= NULL
1156 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1159 /* When loading sections, we can either look for ".<name>", or for
1160 * ".z<name>", which indicates a compressed section. */
1163 section_is_p (const char *section_name
, const char *name
)
1165 return (section_name
[0] == '.'
1166 && (strcmp (section_name
+ 1, name
) == 0
1167 || (section_name
[1] == 'z'
1168 && strcmp (section_name
+ 2, name
) == 0)));
1171 /* This function is mapped across the sections and remembers the
1172 offset and size of each of the debugging sections we are interested
1176 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1178 if (section_is_p (sectp
->name
, INFO_SECTION
))
1180 dwarf2_per_objfile
->info
.asection
= sectp
;
1181 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1183 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1185 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1186 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1188 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1190 dwarf2_per_objfile
->line
.asection
= sectp
;
1191 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1193 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1195 dwarf2_per_objfile
->loc
.asection
= sectp
;
1196 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1198 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1200 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1201 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1203 else if (section_is_p (sectp
->name
, STR_SECTION
))
1205 dwarf2_per_objfile
->str
.asection
= sectp
;
1206 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1208 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1210 dwarf2_per_objfile
->frame
.asection
= sectp
;
1211 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1213 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1215 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1217 if (aflag
& SEC_HAS_CONTENTS
)
1219 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1220 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1223 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1225 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1226 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1228 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1230 dwarf2_per_objfile
->types
.asection
= sectp
;
1231 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1234 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1235 && bfd_section_vma (abfd
, sectp
) == 0)
1236 dwarf2_per_objfile
->has_section_at_zero
= 1;
1239 /* Decompress a section that was compressed using zlib. Store the
1240 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1243 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1244 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1246 bfd
*abfd
= objfile
->obfd
;
1248 error (_("Support for zlib-compressed DWARF data (from '%s') "
1249 "is disabled in this copy of GDB"),
1250 bfd_get_filename (abfd
));
1252 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1253 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1254 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1255 bfd_size_type uncompressed_size
;
1256 gdb_byte
*uncompressed_buffer
;
1259 int header_size
= 12;
1261 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1262 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1263 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1264 bfd_get_filename (abfd
));
1266 /* Read the zlib header. In this case, it should be "ZLIB" followed
1267 by the uncompressed section size, 8 bytes in big-endian order. */
1268 if (compressed_size
< header_size
1269 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1270 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1271 bfd_get_filename (abfd
));
1272 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1273 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1274 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1275 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1276 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1277 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1278 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1279 uncompressed_size
+= compressed_buffer
[11];
1281 /* It is possible the section consists of several compressed
1282 buffers concatenated together, so we uncompress in a loop. */
1286 strm
.avail_in
= compressed_size
- header_size
;
1287 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1288 strm
.avail_out
= uncompressed_size
;
1289 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1291 rc
= inflateInit (&strm
);
1292 while (strm
.avail_in
> 0)
1295 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1296 bfd_get_filename (abfd
), rc
);
1297 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1298 + (uncompressed_size
- strm
.avail_out
));
1299 rc
= inflate (&strm
, Z_FINISH
);
1300 if (rc
!= Z_STREAM_END
)
1301 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1302 bfd_get_filename (abfd
), rc
);
1303 rc
= inflateReset (&strm
);
1305 rc
= inflateEnd (&strm
);
1307 || strm
.avail_out
!= 0)
1308 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1309 bfd_get_filename (abfd
), rc
);
1311 do_cleanups (cleanup
);
1312 *outbuf
= uncompressed_buffer
;
1313 *outsize
= uncompressed_size
;
1317 /* Read the contents of the section SECTP from object file specified by
1318 OBJFILE, store info about the section into INFO.
1319 If the section is compressed, uncompress it before returning. */
1322 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1324 bfd
*abfd
= objfile
->obfd
;
1325 asection
*sectp
= info
->asection
;
1326 gdb_byte
*buf
, *retbuf
;
1327 unsigned char header
[4];
1331 info
->buffer
= NULL
;
1332 info
->was_mmapped
= 0;
1335 if (info
->asection
== NULL
|| info
->size
== 0)
1338 /* Check if the file has a 4-byte header indicating compression. */
1339 if (info
->size
> sizeof (header
)
1340 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1341 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1343 /* Upon decompression, update the buffer and its size. */
1344 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1346 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1354 pagesize
= getpagesize ();
1356 /* Only try to mmap sections which are large enough: we don't want to
1357 waste space due to fragmentation. Also, only try mmap for sections
1358 without relocations. */
1360 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1362 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1363 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1364 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1365 MAP_PRIVATE
, pg_offset
);
1367 if (retbuf
!= MAP_FAILED
)
1369 info
->was_mmapped
= 1;
1370 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1371 #if HAVE_POSIX_MADVISE
1372 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1379 /* If we get here, we are a normal, not-compressed section. */
1381 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1383 /* When debugging .o files, we may need to apply relocations; see
1384 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1385 We never compress sections in .o files, so we only need to
1386 try this when the section is not compressed. */
1387 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1390 info
->buffer
= retbuf
;
1394 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1395 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1396 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1397 bfd_get_filename (abfd
));
1400 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1404 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1405 asection
**sectp
, gdb_byte
**bufp
,
1406 bfd_size_type
*sizep
)
1408 struct dwarf2_per_objfile
*data
1409 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1410 struct dwarf2_section_info
*info
;
1412 /* We may see an objfile without any DWARF, in which case we just
1421 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1422 info
= &data
->eh_frame
;
1423 else if (section_is_p (section_name
, FRAME_SECTION
))
1424 info
= &data
->frame
;
1428 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1429 /* We haven't read this section in yet. Do it now. */
1430 dwarf2_read_section (objfile
, info
);
1432 *sectp
= info
->asection
;
1433 *bufp
= info
->buffer
;
1434 *sizep
= info
->size
;
1437 /* Build a partial symbol table. */
1440 dwarf2_build_psymtabs (struct objfile
*objfile
)
1442 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1444 init_psymbol_list (objfile
, 1024);
1447 dwarf2_build_psymtabs_hard (objfile
);
1450 /* Return TRUE if OFFSET is within CU_HEADER. */
1453 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1455 unsigned int bottom
= cu_header
->offset
;
1456 unsigned int top
= (cu_header
->offset
1458 + cu_header
->initial_length_size
);
1460 return (offset
>= bottom
&& offset
< top
);
1463 /* Read in the comp unit header information from the debug_info at info_ptr.
1464 NOTE: This leaves members offset, first_die_offset to be filled in
1468 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1469 gdb_byte
*info_ptr
, bfd
*abfd
)
1472 unsigned int bytes_read
;
1474 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1475 cu_header
->initial_length_size
= bytes_read
;
1476 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1477 info_ptr
+= bytes_read
;
1478 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1480 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1482 info_ptr
+= bytes_read
;
1483 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1485 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1486 if (signed_addr
< 0)
1487 internal_error (__FILE__
, __LINE__
,
1488 _("read_comp_unit_head: dwarf from non elf file"));
1489 cu_header
->signed_addr_p
= signed_addr
;
1495 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1496 gdb_byte
*buffer
, unsigned int buffer_size
,
1499 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1501 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1503 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
1504 error (_("Dwarf Error: wrong version in compilation unit header "
1505 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
1506 bfd_get_filename (abfd
));
1508 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1509 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1510 "(offset 0x%lx + 6) [in module %s]"),
1511 (long) header
->abbrev_offset
,
1512 (long) (beg_of_comp_unit
- buffer
),
1513 bfd_get_filename (abfd
));
1515 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1516 > buffer
+ buffer_size
)
1517 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1518 "(offset 0x%lx + 0) [in module %s]"),
1519 (long) header
->length
,
1520 (long) (beg_of_comp_unit
- buffer
),
1521 bfd_get_filename (abfd
));
1526 /* Read in the types comp unit header information from .debug_types entry at
1527 types_ptr. The result is a pointer to one past the end of the header. */
1530 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1531 ULONGEST
*signature
,
1532 gdb_byte
*types_ptr
, bfd
*abfd
)
1534 gdb_byte
*initial_types_ptr
= types_ptr
;
1536 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
1537 &dwarf2_per_objfile
->types
);
1538 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1540 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1542 *signature
= read_8_bytes (abfd
, types_ptr
);
1544 types_ptr
+= cu_header
->offset_size
;
1545 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1550 /* Allocate a new partial symtab for file named NAME and mark this new
1551 partial symtab as being an include of PST. */
1554 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1555 struct objfile
*objfile
)
1557 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1559 subpst
->section_offsets
= pst
->section_offsets
;
1560 subpst
->textlow
= 0;
1561 subpst
->texthigh
= 0;
1563 subpst
->dependencies
= (struct partial_symtab
**)
1564 obstack_alloc (&objfile
->objfile_obstack
,
1565 sizeof (struct partial_symtab
*));
1566 subpst
->dependencies
[0] = pst
;
1567 subpst
->number_of_dependencies
= 1;
1569 subpst
->globals_offset
= 0;
1570 subpst
->n_global_syms
= 0;
1571 subpst
->statics_offset
= 0;
1572 subpst
->n_static_syms
= 0;
1573 subpst
->symtab
= NULL
;
1574 subpst
->read_symtab
= pst
->read_symtab
;
1577 /* No private part is necessary for include psymtabs. This property
1578 can be used to differentiate between such include psymtabs and
1579 the regular ones. */
1580 subpst
->read_symtab_private
= NULL
;
1583 /* Read the Line Number Program data and extract the list of files
1584 included by the source file represented by PST. Build an include
1585 partial symtab for each of these included files. */
1588 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1589 struct die_info
*die
,
1590 struct partial_symtab
*pst
)
1592 struct objfile
*objfile
= cu
->objfile
;
1593 bfd
*abfd
= objfile
->obfd
;
1594 struct line_header
*lh
= NULL
;
1595 struct attribute
*attr
;
1597 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1600 unsigned int line_offset
= DW_UNSND (attr
);
1602 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1605 return; /* No linetable, so no includes. */
1607 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1609 free_line_header (lh
);
1613 hash_type_signature (const void *item
)
1615 const struct signatured_type
*type_sig
= item
;
1617 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1618 return type_sig
->signature
;
1622 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1624 const struct signatured_type
*lhs
= item_lhs
;
1625 const struct signatured_type
*rhs
= item_rhs
;
1627 return lhs
->signature
== rhs
->signature
;
1630 /* Create the hash table of all entries in the .debug_types section.
1631 The result is zero if there is an error (e.g. missing .debug_types section),
1632 otherwise non-zero. */
1635 create_debug_types_hash_table (struct objfile
*objfile
)
1640 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1641 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1643 if (info_ptr
== NULL
)
1645 dwarf2_per_objfile
->signatured_types
= NULL
;
1649 types_htab
= htab_create_alloc_ex (41,
1650 hash_type_signature
,
1653 &objfile
->objfile_obstack
,
1654 hashtab_obstack_allocate
,
1655 dummy_obstack_deallocate
);
1657 if (dwarf2_die_debug
)
1658 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1660 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1662 unsigned int offset
;
1663 unsigned int offset_size
;
1664 unsigned int type_offset
;
1665 unsigned int length
, initial_length_size
;
1666 unsigned short version
;
1668 struct signatured_type
*type_sig
;
1670 gdb_byte
*ptr
= info_ptr
;
1672 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1674 /* We need to read the type's signature in order to build the hash
1675 table, but we don't need to read anything else just yet. */
1677 /* Sanity check to ensure entire cu is present. */
1678 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1679 if (ptr
+ length
+ initial_length_size
1680 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1682 complaint (&symfile_complaints
,
1683 _("debug type entry runs off end of `.debug_types' section, ignored"));
1687 offset_size
= initial_length_size
== 4 ? 4 : 8;
1688 ptr
+= initial_length_size
;
1689 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1691 ptr
+= offset_size
; /* abbrev offset */
1692 ptr
+= 1; /* address size */
1693 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1695 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1697 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1698 memset (type_sig
, 0, sizeof (*type_sig
));
1699 type_sig
->signature
= signature
;
1700 type_sig
->offset
= offset
;
1701 type_sig
->type_offset
= type_offset
;
1703 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1704 gdb_assert (slot
!= NULL
);
1707 if (dwarf2_die_debug
)
1708 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1709 offset
, phex (signature
, sizeof (signature
)));
1711 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1714 dwarf2_per_objfile
->signatured_types
= types_htab
;
1719 /* Lookup a signature based type.
1720 Returns NULL if SIG is not present in the table. */
1722 static struct signatured_type
*
1723 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1725 struct signatured_type find_entry
, *entry
;
1727 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1729 complaint (&symfile_complaints
,
1730 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1734 find_entry
.signature
= sig
;
1735 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1739 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1742 init_cu_die_reader (struct die_reader_specs
*reader
,
1743 struct dwarf2_cu
*cu
)
1745 reader
->abfd
= cu
->objfile
->obfd
;
1747 if (cu
->per_cu
->from_debug_types
)
1749 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1750 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1754 gdb_assert (dwarf2_per_objfile
->info
.readin
);
1755 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1759 /* Find the base address of the compilation unit for range lists and
1760 location lists. It will normally be specified by DW_AT_low_pc.
1761 In DWARF-3 draft 4, the base address could be overridden by
1762 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1763 compilation units with discontinuous ranges. */
1766 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1768 struct attribute
*attr
;
1771 cu
->base_address
= 0;
1773 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1776 cu
->base_address
= DW_ADDR (attr
);
1781 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1784 cu
->base_address
= DW_ADDR (attr
);
1790 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1791 to combine the common parts.
1792 Process a compilation unit for a psymtab.
1793 BUFFER is a pointer to the beginning of the dwarf section buffer,
1794 either .debug_info or debug_types.
1795 INFO_PTR is a pointer to the start of the CU.
1796 Returns a pointer to the next CU. */
1799 process_psymtab_comp_unit (struct objfile
*objfile
,
1800 struct dwarf2_per_cu_data
*this_cu
,
1801 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1802 unsigned int buffer_size
)
1804 bfd
*abfd
= objfile
->obfd
;
1805 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1806 struct die_info
*comp_unit_die
;
1807 struct partial_symtab
*pst
;
1809 struct cleanup
*back_to_inner
;
1810 struct dwarf2_cu cu
;
1811 int has_children
, has_pc_info
;
1812 struct attribute
*attr
;
1813 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1814 struct die_reader_specs reader_specs
;
1816 memset (&cu
, 0, sizeof (cu
));
1817 cu
.objfile
= objfile
;
1818 obstack_init (&cu
.comp_unit_obstack
);
1820 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1822 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1823 buffer
, buffer_size
,
1826 /* Complete the cu_header. */
1827 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1828 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1830 cu
.list_in_scope
= &file_symbols
;
1832 /* If this compilation unit was already read in, free the
1833 cached copy in order to read it in again. This is
1834 necessary because we skipped some symbols when we first
1835 read in the compilation unit (see load_partial_dies).
1836 This problem could be avoided, but the benefit is
1838 if (this_cu
->cu
!= NULL
)
1839 free_one_cached_comp_unit (this_cu
->cu
);
1841 /* Note that this is a pointer to our stack frame, being
1842 added to a global data structure. It will be cleaned up
1843 in free_stack_comp_unit when we finish with this
1844 compilation unit. */
1846 cu
.per_cu
= this_cu
;
1848 /* Read the abbrevs for this compilation unit into a table. */
1849 dwarf2_read_abbrevs (abfd
, &cu
);
1850 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1852 /* Read the compilation unit die. */
1853 if (this_cu
->from_debug_types
)
1854 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1855 init_cu_die_reader (&reader_specs
, &cu
);
1856 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1859 if (this_cu
->from_debug_types
)
1861 /* offset,length haven't been set yet for type units. */
1862 this_cu
->offset
= cu
.header
.offset
;
1863 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1865 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1867 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1868 + cu
.header
.initial_length_size
);
1869 do_cleanups (back_to_inner
);
1873 /* Set the language we're debugging. */
1874 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1876 set_cu_language (DW_UNSND (attr
), &cu
);
1878 set_cu_language (language_minimal
, &cu
);
1880 /* Allocate a new partial symbol table structure. */
1881 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1882 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1883 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1884 /* TEXTLOW and TEXTHIGH are set below. */
1886 objfile
->global_psymbols
.next
,
1887 objfile
->static_psymbols
.next
);
1889 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1891 pst
->dirname
= DW_STRING (attr
);
1893 pst
->read_symtab_private
= this_cu
;
1895 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1897 /* Store the function that reads in the rest of the symbol table */
1898 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1900 this_cu
->psymtab
= pst
;
1902 dwarf2_find_base_address (comp_unit_die
, &cu
);
1904 /* Possibly set the default values of LOWPC and HIGHPC from
1906 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1907 &best_highpc
, &cu
, pst
);
1908 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1909 /* Store the contiguous range if it is not empty; it can be empty for
1910 CUs with no code. */
1911 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1912 best_lowpc
+ baseaddr
,
1913 best_highpc
+ baseaddr
- 1, pst
);
1915 /* Check if comp unit has_children.
1916 If so, read the rest of the partial symbols from this comp unit.
1917 If not, there's no more debug_info for this comp unit. */
1920 struct partial_die_info
*first_die
;
1921 CORE_ADDR lowpc
, highpc
;
1923 lowpc
= ((CORE_ADDR
) -1);
1924 highpc
= ((CORE_ADDR
) 0);
1926 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1928 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1929 ! has_pc_info
, &cu
);
1931 /* If we didn't find a lowpc, set it to highpc to avoid
1932 complaints from `maint check'. */
1933 if (lowpc
== ((CORE_ADDR
) -1))
1936 /* If the compilation unit didn't have an explicit address range,
1937 then use the information extracted from its child dies. */
1941 best_highpc
= highpc
;
1944 pst
->textlow
= best_lowpc
+ baseaddr
;
1945 pst
->texthigh
= best_highpc
+ baseaddr
;
1947 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1948 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1949 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1950 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1951 sort_pst_symbols (pst
);
1953 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1954 + cu
.header
.initial_length_size
);
1956 if (this_cu
->from_debug_types
)
1958 /* It's not clear we want to do anything with stmt lists here.
1959 Waiting to see what gcc ultimately does. */
1963 /* Get the list of files included in the current compilation unit,
1964 and build a psymtab for each of them. */
1965 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
1968 do_cleanups (back_to_inner
);
1973 /* Traversal function for htab_traverse_noresize.
1974 Process one .debug_types comp-unit. */
1977 process_type_comp_unit (void **slot
, void *info
)
1979 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
1980 struct objfile
*objfile
= (struct objfile
*) info
;
1981 struct dwarf2_per_cu_data
*this_cu
;
1983 this_cu
= &entry
->per_cu
;
1984 this_cu
->from_debug_types
= 1;
1986 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1987 process_psymtab_comp_unit (objfile
, this_cu
,
1988 dwarf2_per_objfile
->types
.buffer
,
1989 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
1990 dwarf2_per_objfile
->types
.size
);
1995 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1996 Build partial symbol tables for the .debug_types comp-units. */
1999 build_type_psymtabs (struct objfile
*objfile
)
2001 if (! create_debug_types_hash_table (objfile
))
2004 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
2005 process_type_comp_unit
, objfile
);
2008 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
2011 psymtabs_addrmap_cleanup (void *o
)
2013 struct objfile
*objfile
= o
;
2015 objfile
->psymtabs_addrmap
= NULL
;
2018 /* Build the partial symbol table by doing a quick pass through the
2019 .debug_info and .debug_abbrev sections. */
2022 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2025 struct cleanup
*back_to
, *addrmap_cleanup
;
2026 struct obstack temp_obstack
;
2028 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2029 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2031 /* Any cached compilation units will be linked by the per-objfile
2032 read_in_chain. Make sure to free them when we're done. */
2033 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2035 build_type_psymtabs (objfile
);
2037 create_all_comp_units (objfile
);
2039 /* Create a temporary address map on a temporary obstack. We later
2040 copy this to the final obstack. */
2041 obstack_init (&temp_obstack
);
2042 make_cleanup_obstack_free (&temp_obstack
);
2043 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
2044 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
2046 /* Since the objects we're extracting from .debug_info vary in
2047 length, only the individual functions to extract them (like
2048 read_comp_unit_head and load_partial_die) can really know whether
2049 the buffer is large enough to hold another complete object.
2051 At the moment, they don't actually check that. If .debug_info
2052 holds just one extra byte after the last compilation unit's dies,
2053 then read_comp_unit_head will happily read off the end of the
2054 buffer. read_partial_die is similarly casual. Those functions
2057 For this loop condition, simply checking whether there's any data
2058 left at all should be sufficient. */
2060 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2061 + dwarf2_per_objfile
->info
.size
))
2063 struct dwarf2_per_cu_data
*this_cu
;
2065 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2068 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2069 dwarf2_per_objfile
->info
.buffer
,
2071 dwarf2_per_objfile
->info
.size
);
2074 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2075 &objfile
->objfile_obstack
);
2076 discard_cleanups (addrmap_cleanup
);
2078 do_cleanups (back_to
);
2081 /* Load the partial DIEs for a secondary CU into memory. */
2084 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2085 struct objfile
*objfile
)
2087 bfd
*abfd
= objfile
->obfd
;
2088 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2089 struct die_info
*comp_unit_die
;
2090 struct dwarf2_cu
*cu
;
2091 struct cleanup
*back_to
;
2092 struct attribute
*attr
;
2094 struct die_reader_specs reader_specs
;
2096 gdb_assert (! this_cu
->from_debug_types
);
2098 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2099 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2100 beg_of_comp_unit
= info_ptr
;
2102 cu
= alloc_one_comp_unit (objfile
);
2104 /* ??? Missing cleanup for CU? */
2106 /* Link this compilation unit into the compilation unit tree. */
2108 cu
->per_cu
= this_cu
;
2109 cu
->type_hash
= this_cu
->type_hash
;
2111 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2112 dwarf2_per_objfile
->info
.buffer
,
2113 dwarf2_per_objfile
->info
.size
,
2116 /* Complete the cu_header. */
2117 cu
->header
.offset
= this_cu
->offset
;
2118 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2120 /* Read the abbrevs for this compilation unit into a table. */
2121 dwarf2_read_abbrevs (abfd
, cu
);
2122 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2124 /* Read the compilation unit die. */
2125 init_cu_die_reader (&reader_specs
, cu
);
2126 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2129 /* Set the language we're debugging. */
2130 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2132 set_cu_language (DW_UNSND (attr
), cu
);
2134 set_cu_language (language_minimal
, cu
);
2136 /* Check if comp unit has_children.
2137 If so, read the rest of the partial symbols from this comp unit.
2138 If not, there's no more debug_info for this comp unit. */
2140 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2142 do_cleanups (back_to
);
2145 /* Create a list of all compilation units in OBJFILE. We do this only
2146 if an inter-comp-unit reference is found; presumably if there is one,
2147 there will be many, and one will occur early in the .debug_info section.
2148 So there's no point in building this list incrementally. */
2151 create_all_comp_units (struct objfile
*objfile
)
2155 struct dwarf2_per_cu_data
**all_comp_units
;
2158 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2159 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2163 all_comp_units
= xmalloc (n_allocated
2164 * sizeof (struct dwarf2_per_cu_data
*));
2166 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2168 unsigned int length
, initial_length_size
;
2169 struct dwarf2_per_cu_data
*this_cu
;
2170 unsigned int offset
;
2172 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2174 /* Read just enough information to find out where the next
2175 compilation unit is. */
2176 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2177 &initial_length_size
);
2179 /* Save the compilation unit for later lookup. */
2180 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2181 sizeof (struct dwarf2_per_cu_data
));
2182 memset (this_cu
, 0, sizeof (*this_cu
));
2183 this_cu
->offset
= offset
;
2184 this_cu
->length
= length
+ initial_length_size
;
2186 if (n_comp_units
== n_allocated
)
2189 all_comp_units
= xrealloc (all_comp_units
,
2191 * sizeof (struct dwarf2_per_cu_data
*));
2193 all_comp_units
[n_comp_units
++] = this_cu
;
2195 info_ptr
= info_ptr
+ this_cu
->length
;
2198 dwarf2_per_objfile
->all_comp_units
2199 = obstack_alloc (&objfile
->objfile_obstack
,
2200 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2201 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2202 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2203 xfree (all_comp_units
);
2204 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2207 /* Process all loaded DIEs for compilation unit CU, starting at
2208 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2209 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2210 DW_AT_ranges). If NEED_PC is set, then this function will set
2211 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2212 and record the covered ranges in the addrmap. */
2215 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2216 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2218 struct partial_die_info
*pdi
;
2220 /* Now, march along the PDI's, descending into ones which have
2221 interesting children but skipping the children of the other ones,
2222 until we reach the end of the compilation unit. */
2228 fixup_partial_die (pdi
, cu
);
2230 /* Anonymous namespaces or modules have no name but have interesting
2231 children, so we need to look at them. Ditto for anonymous
2234 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2235 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
2239 case DW_TAG_subprogram
:
2240 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2242 case DW_TAG_variable
:
2243 case DW_TAG_typedef
:
2244 case DW_TAG_union_type
:
2245 if (!pdi
->is_declaration
)
2247 add_partial_symbol (pdi
, cu
);
2250 case DW_TAG_class_type
:
2251 case DW_TAG_interface_type
:
2252 case DW_TAG_structure_type
:
2253 if (!pdi
->is_declaration
)
2255 add_partial_symbol (pdi
, cu
);
2258 case DW_TAG_enumeration_type
:
2259 if (!pdi
->is_declaration
)
2260 add_partial_enumeration (pdi
, cu
);
2262 case DW_TAG_base_type
:
2263 case DW_TAG_subrange_type
:
2264 /* File scope base type definitions are added to the partial
2266 add_partial_symbol (pdi
, cu
);
2268 case DW_TAG_namespace
:
2269 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2272 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2279 /* If the die has a sibling, skip to the sibling. */
2281 pdi
= pdi
->die_sibling
;
2285 /* Functions used to compute the fully scoped name of a partial DIE.
2287 Normally, this is simple. For C++, the parent DIE's fully scoped
2288 name is concatenated with "::" and the partial DIE's name. For
2289 Java, the same thing occurs except that "." is used instead of "::".
2290 Enumerators are an exception; they use the scope of their parent
2291 enumeration type, i.e. the name of the enumeration type is not
2292 prepended to the enumerator.
2294 There are two complexities. One is DW_AT_specification; in this
2295 case "parent" means the parent of the target of the specification,
2296 instead of the direct parent of the DIE. The other is compilers
2297 which do not emit DW_TAG_namespace; in this case we try to guess
2298 the fully qualified name of structure types from their members'
2299 linkage names. This must be done using the DIE's children rather
2300 than the children of any DW_AT_specification target. We only need
2301 to do this for structures at the top level, i.e. if the target of
2302 any DW_AT_specification (if any; otherwise the DIE itself) does not
2305 /* Compute the scope prefix associated with PDI's parent, in
2306 compilation unit CU. The result will be allocated on CU's
2307 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2308 field. NULL is returned if no prefix is necessary. */
2310 partial_die_parent_scope (struct partial_die_info
*pdi
,
2311 struct dwarf2_cu
*cu
)
2313 char *grandparent_scope
;
2314 struct partial_die_info
*parent
, *real_pdi
;
2316 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2317 then this means the parent of the specification DIE. */
2320 while (real_pdi
->has_specification
)
2321 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2323 parent
= real_pdi
->die_parent
;
2327 if (parent
->scope_set
)
2328 return parent
->scope
;
2330 fixup_partial_die (parent
, cu
);
2332 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2334 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2335 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2336 Work around this problem here. */
2337 if (cu
->language
== language_cplus
2338 && parent
->tag
== DW_TAG_namespace
2339 && strcmp (parent
->name
, "::") == 0
2340 && grandparent_scope
== NULL
)
2342 parent
->scope
= NULL
;
2343 parent
->scope_set
= 1;
2347 if (parent
->tag
== DW_TAG_namespace
2348 || parent
->tag
== DW_TAG_module
2349 || parent
->tag
== DW_TAG_structure_type
2350 || parent
->tag
== DW_TAG_class_type
2351 || parent
->tag
== DW_TAG_interface_type
2352 || parent
->tag
== DW_TAG_union_type
2353 || parent
->tag
== DW_TAG_enumeration_type
)
2355 if (grandparent_scope
== NULL
)
2356 parent
->scope
= parent
->name
;
2358 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2359 parent
->name
, 0, cu
);
2361 else if (parent
->tag
== DW_TAG_enumerator
)
2362 /* Enumerators should not get the name of the enumeration as a prefix. */
2363 parent
->scope
= grandparent_scope
;
2366 /* FIXME drow/2004-04-01: What should we be doing with
2367 function-local names? For partial symbols, we should probably be
2369 complaint (&symfile_complaints
,
2370 _("unhandled containing DIE tag %d for DIE at %d"),
2371 parent
->tag
, pdi
->offset
);
2372 parent
->scope
= grandparent_scope
;
2375 parent
->scope_set
= 1;
2376 return parent
->scope
;
2379 /* Return the fully scoped name associated with PDI, from compilation unit
2380 CU. The result will be allocated with malloc. */
2382 partial_die_full_name (struct partial_die_info
*pdi
,
2383 struct dwarf2_cu
*cu
)
2387 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2388 if (parent_scope
== NULL
)
2391 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
2395 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2397 struct objfile
*objfile
= cu
->objfile
;
2399 char *actual_name
= NULL
;
2400 const struct partial_symbol
*psym
= NULL
;
2402 int built_actual_name
= 0;
2404 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2406 actual_name
= partial_die_full_name (pdi
, cu
);
2408 built_actual_name
= 1;
2410 if (actual_name
== NULL
)
2411 actual_name
= pdi
->name
;
2415 case DW_TAG_subprogram
:
2416 if (pdi
->is_external
|| cu
->language
== language_ada
)
2418 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2419 of the global scope. But in Ada, we want to be able to access
2420 nested procedures globally. So all Ada subprograms are stored
2421 in the global scope. */
2422 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2423 mst_text, objfile); */
2424 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2426 VAR_DOMAIN
, LOC_BLOCK
,
2427 &objfile
->global_psymbols
,
2428 0, pdi
->lowpc
+ baseaddr
,
2429 cu
->language
, objfile
);
2433 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2434 mst_file_text, objfile); */
2435 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2437 VAR_DOMAIN
, LOC_BLOCK
,
2438 &objfile
->static_psymbols
,
2439 0, pdi
->lowpc
+ baseaddr
,
2440 cu
->language
, objfile
);
2443 case DW_TAG_variable
:
2444 if (pdi
->is_external
)
2447 Don't enter into the minimal symbol tables as there is
2448 a minimal symbol table entry from the ELF symbols already.
2449 Enter into partial symbol table if it has a location
2450 descriptor or a type.
2451 If the location descriptor is missing, new_symbol will create
2452 a LOC_UNRESOLVED symbol, the address of the variable will then
2453 be determined from the minimal symbol table whenever the variable
2455 The address for the partial symbol table entry is not
2456 used by GDB, but it comes in handy for debugging partial symbol
2460 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2461 if (pdi
->locdesc
|| pdi
->has_type
)
2462 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2464 VAR_DOMAIN
, LOC_STATIC
,
2465 &objfile
->global_psymbols
,
2467 cu
->language
, objfile
);
2471 /* Static Variable. Skip symbols without location descriptors. */
2472 if (pdi
->locdesc
== NULL
)
2474 if (built_actual_name
)
2475 xfree (actual_name
);
2478 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2479 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2480 mst_file_data, objfile); */
2481 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2483 VAR_DOMAIN
, LOC_STATIC
,
2484 &objfile
->static_psymbols
,
2486 cu
->language
, objfile
);
2489 case DW_TAG_typedef
:
2490 case DW_TAG_base_type
:
2491 case DW_TAG_subrange_type
:
2492 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2494 VAR_DOMAIN
, LOC_TYPEDEF
,
2495 &objfile
->static_psymbols
,
2496 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2498 case DW_TAG_namespace
:
2499 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2501 VAR_DOMAIN
, LOC_TYPEDEF
,
2502 &objfile
->global_psymbols
,
2503 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2505 case DW_TAG_class_type
:
2506 case DW_TAG_interface_type
:
2507 case DW_TAG_structure_type
:
2508 case DW_TAG_union_type
:
2509 case DW_TAG_enumeration_type
:
2510 /* Skip external references. The DWARF standard says in the section
2511 about "Structure, Union, and Class Type Entries": "An incomplete
2512 structure, union or class type is represented by a structure,
2513 union or class entry that does not have a byte size attribute
2514 and that has a DW_AT_declaration attribute." */
2515 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2517 if (built_actual_name
)
2518 xfree (actual_name
);
2522 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2523 static vs. global. */
2524 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2526 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2527 (cu
->language
== language_cplus
2528 || cu
->language
== language_java
)
2529 ? &objfile
->global_psymbols
2530 : &objfile
->static_psymbols
,
2531 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2534 case DW_TAG_enumerator
:
2535 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2537 VAR_DOMAIN
, LOC_CONST
,
2538 (cu
->language
== language_cplus
2539 || cu
->language
== language_java
)
2540 ? &objfile
->global_psymbols
2541 : &objfile
->static_psymbols
,
2542 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2548 if (built_actual_name
)
2549 xfree (actual_name
);
2552 /* Read a partial die corresponding to a namespace; also, add a symbol
2553 corresponding to that namespace to the symbol table. NAMESPACE is
2554 the name of the enclosing namespace. */
2557 add_partial_namespace (struct partial_die_info
*pdi
,
2558 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2559 int need_pc
, struct dwarf2_cu
*cu
)
2561 /* Add a symbol for the namespace. */
2563 add_partial_symbol (pdi
, cu
);
2565 /* Now scan partial symbols in that namespace. */
2567 if (pdi
->has_children
)
2568 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2571 /* Read a partial die corresponding to a Fortran module. */
2574 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2575 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2577 /* Now scan partial symbols in that module. */
2579 if (pdi
->has_children
)
2580 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2583 /* Read a partial die corresponding to a subprogram and create a partial
2584 symbol for that subprogram. When the CU language allows it, this
2585 routine also defines a partial symbol for each nested subprogram
2586 that this subprogram contains.
2588 DIE my also be a lexical block, in which case we simply search
2589 recursively for suprograms defined inside that lexical block.
2590 Again, this is only performed when the CU language allows this
2591 type of definitions. */
2594 add_partial_subprogram (struct partial_die_info
*pdi
,
2595 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2596 int need_pc
, struct dwarf2_cu
*cu
)
2598 if (pdi
->tag
== DW_TAG_subprogram
)
2600 if (pdi
->has_pc_info
)
2602 if (pdi
->lowpc
< *lowpc
)
2603 *lowpc
= pdi
->lowpc
;
2604 if (pdi
->highpc
> *highpc
)
2605 *highpc
= pdi
->highpc
;
2609 struct objfile
*objfile
= cu
->objfile
;
2611 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2612 SECT_OFF_TEXT (objfile
));
2613 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2614 pdi
->lowpc
+ baseaddr
,
2615 pdi
->highpc
- 1 + baseaddr
,
2616 cu
->per_cu
->psymtab
);
2618 if (!pdi
->is_declaration
)
2619 /* Ignore subprogram DIEs that do not have a name, they are
2620 illegal. Do not emit a complaint at this point, we will
2621 do so when we convert this psymtab into a symtab. */
2623 add_partial_symbol (pdi
, cu
);
2627 if (! pdi
->has_children
)
2630 if (cu
->language
== language_ada
)
2632 pdi
= pdi
->die_child
;
2635 fixup_partial_die (pdi
, cu
);
2636 if (pdi
->tag
== DW_TAG_subprogram
2637 || pdi
->tag
== DW_TAG_lexical_block
)
2638 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2639 pdi
= pdi
->die_sibling
;
2644 /* See if we can figure out if the class lives in a namespace. We do
2645 this by looking for a member function; its demangled name will
2646 contain namespace info, if there is any. */
2649 guess_structure_name (struct partial_die_info
*struct_pdi
,
2650 struct dwarf2_cu
*cu
)
2652 if ((cu
->language
== language_cplus
2653 || cu
->language
== language_java
)
2654 && cu
->has_namespace_info
== 0
2655 && struct_pdi
->has_children
)
2657 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2658 what template types look like, because the demangler
2659 frequently doesn't give the same name as the debug info. We
2660 could fix this by only using the demangled name to get the
2661 prefix (but see comment in read_structure_type). */
2663 struct partial_die_info
*real_pdi
;
2665 /* If this DIE (this DIE's specification, if any) has a parent, then
2666 we should not do this. We'll prepend the parent's fully qualified
2667 name when we create the partial symbol. */
2669 real_pdi
= struct_pdi
;
2670 while (real_pdi
->has_specification
)
2671 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2673 if (real_pdi
->die_parent
!= NULL
)
2678 /* Read a partial die corresponding to an enumeration type. */
2681 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2682 struct dwarf2_cu
*cu
)
2684 struct partial_die_info
*pdi
;
2686 if (enum_pdi
->name
!= NULL
)
2687 add_partial_symbol (enum_pdi
, cu
);
2689 pdi
= enum_pdi
->die_child
;
2692 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2693 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2695 add_partial_symbol (pdi
, cu
);
2696 pdi
= pdi
->die_sibling
;
2700 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2701 Return the corresponding abbrev, or NULL if the number is zero (indicating
2702 an empty DIE). In either case *BYTES_READ will be set to the length of
2703 the initial number. */
2705 static struct abbrev_info
*
2706 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2707 struct dwarf2_cu
*cu
)
2709 bfd
*abfd
= cu
->objfile
->obfd
;
2710 unsigned int abbrev_number
;
2711 struct abbrev_info
*abbrev
;
2713 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2715 if (abbrev_number
== 0)
2718 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2721 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2722 bfd_get_filename (abfd
));
2728 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2729 Returns a pointer to the end of a series of DIEs, terminated by an empty
2730 DIE. Any children of the skipped DIEs will also be skipped. */
2733 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2735 struct abbrev_info
*abbrev
;
2736 unsigned int bytes_read
;
2740 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2742 return info_ptr
+ bytes_read
;
2744 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2748 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2749 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2750 abbrev corresponding to that skipped uleb128 should be passed in
2751 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2755 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2756 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2758 unsigned int bytes_read
;
2759 struct attribute attr
;
2760 bfd
*abfd
= cu
->objfile
->obfd
;
2761 unsigned int form
, i
;
2763 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2765 /* The only abbrev we care about is DW_AT_sibling. */
2766 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2768 read_attribute (&attr
, &abbrev
->attrs
[i
],
2769 abfd
, info_ptr
, cu
);
2770 if (attr
.form
== DW_FORM_ref_addr
)
2771 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2773 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2776 /* If it isn't DW_AT_sibling, skip this attribute. */
2777 form
= abbrev
->attrs
[i
].form
;
2781 case DW_FORM_ref_addr
:
2782 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2783 and later it is offset sized. */
2784 if (cu
->header
.version
== 2)
2785 info_ptr
+= cu
->header
.addr_size
;
2787 info_ptr
+= cu
->header
.offset_size
;
2790 info_ptr
+= cu
->header
.addr_size
;
2797 case DW_FORM_flag_present
:
2812 case DW_FORM_string
:
2813 read_string (abfd
, info_ptr
, &bytes_read
);
2814 info_ptr
+= bytes_read
;
2816 case DW_FORM_sec_offset
:
2818 info_ptr
+= cu
->header
.offset_size
;
2820 case DW_FORM_exprloc
:
2822 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2823 info_ptr
+= bytes_read
;
2825 case DW_FORM_block1
:
2826 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2828 case DW_FORM_block2
:
2829 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2831 case DW_FORM_block4
:
2832 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2836 case DW_FORM_ref_udata
:
2837 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2839 case DW_FORM_indirect
:
2840 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2841 info_ptr
+= bytes_read
;
2842 /* We need to continue parsing from here, so just go back to
2844 goto skip_attribute
;
2847 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2848 dwarf_form_name (form
),
2849 bfd_get_filename (abfd
));
2853 if (abbrev
->has_children
)
2854 return skip_children (buffer
, info_ptr
, cu
);
2859 /* Locate ORIG_PDI's sibling.
2860 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2864 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2865 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2866 bfd
*abfd
, struct dwarf2_cu
*cu
)
2868 /* Do we know the sibling already? */
2870 if (orig_pdi
->sibling
)
2871 return orig_pdi
->sibling
;
2873 /* Are there any children to deal with? */
2875 if (!orig_pdi
->has_children
)
2878 /* Skip the children the long way. */
2880 return skip_children (buffer
, info_ptr
, cu
);
2883 /* Expand this partial symbol table into a full symbol table. */
2886 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2888 /* FIXME: This is barely more than a stub. */
2893 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2899 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2900 gdb_flush (gdb_stdout
);
2903 /* Restore our global data. */
2904 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2905 dwarf2_objfile_data_key
);
2907 /* If this psymtab is constructed from a debug-only objfile, the
2908 has_section_at_zero flag will not necessarily be correct. We
2909 can get the correct value for this flag by looking at the data
2910 associated with the (presumably stripped) associated objfile. */
2911 if (pst
->objfile
->separate_debug_objfile_backlink
)
2913 struct dwarf2_per_objfile
*dpo_backlink
2914 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2915 dwarf2_objfile_data_key
);
2917 dwarf2_per_objfile
->has_section_at_zero
2918 = dpo_backlink
->has_section_at_zero
;
2921 psymtab_to_symtab_1 (pst
);
2923 /* Finish up the debug error message. */
2925 printf_filtered (_("done.\n"));
2930 /* Add PER_CU to the queue. */
2933 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2935 struct dwarf2_queue_item
*item
;
2938 item
= xmalloc (sizeof (*item
));
2939 item
->per_cu
= per_cu
;
2942 if (dwarf2_queue
== NULL
)
2943 dwarf2_queue
= item
;
2945 dwarf2_queue_tail
->next
= item
;
2947 dwarf2_queue_tail
= item
;
2950 /* Process the queue. */
2953 process_queue (struct objfile
*objfile
)
2955 struct dwarf2_queue_item
*item
, *next_item
;
2957 /* The queue starts out with one item, but following a DIE reference
2958 may load a new CU, adding it to the end of the queue. */
2959 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2961 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2962 process_full_comp_unit (item
->per_cu
);
2964 item
->per_cu
->queued
= 0;
2965 next_item
= item
->next
;
2969 dwarf2_queue_tail
= NULL
;
2972 /* Free all allocated queue entries. This function only releases anything if
2973 an error was thrown; if the queue was processed then it would have been
2974 freed as we went along. */
2977 dwarf2_release_queue (void *dummy
)
2979 struct dwarf2_queue_item
*item
, *last
;
2981 item
= dwarf2_queue
;
2984 /* Anything still marked queued is likely to be in an
2985 inconsistent state, so discard it. */
2986 if (item
->per_cu
->queued
)
2988 if (item
->per_cu
->cu
!= NULL
)
2989 free_one_cached_comp_unit (item
->per_cu
->cu
);
2990 item
->per_cu
->queued
= 0;
2998 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
3001 /* Read in full symbols for PST, and anything it depends on. */
3004 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
3006 struct dwarf2_per_cu_data
*per_cu
;
3007 struct cleanup
*back_to
;
3010 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3011 if (!pst
->dependencies
[i
]->readin
)
3013 /* Inform about additional files that need to be read in. */
3016 /* FIXME: i18n: Need to make this a single string. */
3017 fputs_filtered (" ", gdb_stdout
);
3019 fputs_filtered ("and ", gdb_stdout
);
3021 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3022 wrap_here (""); /* Flush output */
3023 gdb_flush (gdb_stdout
);
3025 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3028 per_cu
= pst
->read_symtab_private
;
3032 /* It's an include file, no symbols to read for it.
3033 Everything is in the parent symtab. */
3038 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3040 queue_comp_unit (per_cu
, pst
->objfile
);
3042 if (per_cu
->from_debug_types
)
3043 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3045 load_full_comp_unit (per_cu
, pst
->objfile
);
3047 process_queue (pst
->objfile
);
3049 /* Age the cache, releasing compilation units that have not
3050 been used recently. */
3051 age_cached_comp_units ();
3053 do_cleanups (back_to
);
3056 /* Load the DIEs associated with PER_CU into memory. */
3059 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3061 bfd
*abfd
= objfile
->obfd
;
3062 struct dwarf2_cu
*cu
;
3063 unsigned int offset
;
3064 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3065 struct cleanup
*back_to
, *free_cu_cleanup
;
3066 struct attribute
*attr
;
3068 gdb_assert (! per_cu
->from_debug_types
);
3070 /* Set local variables from the partial symbol table info. */
3071 offset
= per_cu
->offset
;
3073 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3074 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3075 beg_of_comp_unit
= info_ptr
;
3077 cu
= alloc_one_comp_unit (objfile
);
3079 /* If an error occurs while loading, release our storage. */
3080 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3082 /* Read in the comp_unit header. */
3083 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3085 /* Complete the cu_header. */
3086 cu
->header
.offset
= offset
;
3087 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3089 /* Read the abbrevs for this compilation unit. */
3090 dwarf2_read_abbrevs (abfd
, cu
);
3091 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3093 /* Link this compilation unit into the compilation unit tree. */
3095 cu
->per_cu
= per_cu
;
3096 cu
->type_hash
= per_cu
->type_hash
;
3098 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3100 /* We try not to read any attributes in this function, because not
3101 all objfiles needed for references have been loaded yet, and symbol
3102 table processing isn't initialized. But we have to set the CU language,
3103 or we won't be able to build types correctly. */
3104 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3106 set_cu_language (DW_UNSND (attr
), cu
);
3108 set_cu_language (language_minimal
, cu
);
3110 /* Similarly, if we do not read the producer, we can not apply
3111 producer-specific interpretation. */
3112 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
3114 cu
->producer
= DW_STRING (attr
);
3116 /* Link this CU into read_in_chain. */
3117 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3118 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3120 do_cleanups (back_to
);
3122 /* We've successfully allocated this compilation unit. Let our caller
3123 clean it up when finished with it. */
3124 discard_cleanups (free_cu_cleanup
);
3127 /* Generate full symbol information for PST and CU, whose DIEs have
3128 already been loaded into memory. */
3131 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3133 struct partial_symtab
*pst
= per_cu
->psymtab
;
3134 struct dwarf2_cu
*cu
= per_cu
->cu
;
3135 struct objfile
*objfile
= pst
->objfile
;
3136 CORE_ADDR lowpc
, highpc
;
3137 struct symtab
*symtab
;
3138 struct cleanup
*back_to
;
3141 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3144 back_to
= make_cleanup (really_free_pendings
, NULL
);
3146 cu
->list_in_scope
= &file_symbols
;
3148 dwarf2_find_base_address (cu
->dies
, cu
);
3150 /* Do line number decoding in read_file_scope () */
3151 process_die (cu
->dies
, cu
);
3153 /* Some compilers don't define a DW_AT_high_pc attribute for the
3154 compilation unit. If the DW_AT_high_pc is missing, synthesize
3155 it, by scanning the DIE's below the compilation unit. */
3156 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3158 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3160 /* Set symtab language to language from DW_AT_language.
3161 If the compilation is from a C file generated by language preprocessors,
3162 do not set the language if it was already deduced by start_subfile. */
3164 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3166 symtab
->language
= cu
->language
;
3168 pst
->symtab
= symtab
;
3171 do_cleanups (back_to
);
3174 /* Process a die and its children. */
3177 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3181 case DW_TAG_padding
:
3183 case DW_TAG_compile_unit
:
3184 read_file_scope (die
, cu
);
3186 case DW_TAG_type_unit
:
3187 read_type_unit_scope (die
, cu
);
3189 case DW_TAG_subprogram
:
3190 case DW_TAG_inlined_subroutine
:
3191 read_func_scope (die
, cu
);
3193 case DW_TAG_lexical_block
:
3194 case DW_TAG_try_block
:
3195 case DW_TAG_catch_block
:
3196 read_lexical_block_scope (die
, cu
);
3198 case DW_TAG_class_type
:
3199 case DW_TAG_interface_type
:
3200 case DW_TAG_structure_type
:
3201 case DW_TAG_union_type
:
3202 process_structure_scope (die
, cu
);
3204 case DW_TAG_enumeration_type
:
3205 process_enumeration_scope (die
, cu
);
3208 /* These dies have a type, but processing them does not create
3209 a symbol or recurse to process the children. Therefore we can
3210 read them on-demand through read_type_die. */
3211 case DW_TAG_subroutine_type
:
3212 case DW_TAG_set_type
:
3213 case DW_TAG_array_type
:
3214 case DW_TAG_pointer_type
:
3215 case DW_TAG_ptr_to_member_type
:
3216 case DW_TAG_reference_type
:
3217 case DW_TAG_string_type
:
3220 case DW_TAG_base_type
:
3221 case DW_TAG_subrange_type
:
3222 case DW_TAG_typedef
:
3223 case DW_TAG_const_type
:
3224 case DW_TAG_volatile_type
:
3225 /* Add a typedef symbol for the type definition, if it has a
3227 new_symbol (die
, read_type_die (die
, cu
), cu
);
3229 case DW_TAG_common_block
:
3230 read_common_block (die
, cu
);
3232 case DW_TAG_common_inclusion
:
3234 case DW_TAG_namespace
:
3235 processing_has_namespace_info
= 1;
3236 read_namespace (die
, cu
);
3239 processing_has_namespace_info
= 1;
3240 read_module (die
, cu
);
3242 case DW_TAG_imported_declaration
:
3243 case DW_TAG_imported_module
:
3244 processing_has_namespace_info
= 1;
3245 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3246 || cu
->language
!= language_fortran
))
3247 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3248 dwarf_tag_name (die
->tag
));
3249 read_import_statement (die
, cu
);
3252 new_symbol (die
, NULL
, cu
);
3257 /* A helper function for dwarf2_compute_name which determines whether DIE
3258 needs to have the name of the scope prepended to the name listed in the
3262 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
3264 struct attribute
*attr
;
3268 case DW_TAG_namespace
:
3269 case DW_TAG_typedef
:
3270 case DW_TAG_class_type
:
3271 case DW_TAG_interface_type
:
3272 case DW_TAG_structure_type
:
3273 case DW_TAG_union_type
:
3274 case DW_TAG_enumeration_type
:
3275 case DW_TAG_enumerator
:
3276 case DW_TAG_subprogram
:
3280 case DW_TAG_variable
:
3281 /* We only need to prefix "globally" visible variables. These include
3282 any variable marked with DW_AT_external or any variable that
3283 lives in a namespace. [Variables in anonymous namespaces
3284 require prefixing, but they are not DW_AT_external.] */
3286 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
3288 struct dwarf2_cu
*spec_cu
= cu
;
3290 return die_needs_namespace (die_specification (die
, &spec_cu
),
3294 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3295 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
3296 && die
->parent
->tag
!= DW_TAG_module
)
3298 /* A variable in a lexical block of some kind does not need a
3299 namespace, even though in C++ such variables may be external
3300 and have a mangled name. */
3301 if (die
->parent
->tag
== DW_TAG_lexical_block
3302 || die
->parent
->tag
== DW_TAG_try_block
3303 || die
->parent
->tag
== DW_TAG_catch_block
3304 || die
->parent
->tag
== DW_TAG_subprogram
)
3313 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3314 compute the physname for the object, which include a method's
3315 formal parameters (C++/Java) and return type (Java).
3317 For Ada, return the DIE's linkage name rather than the fully qualified
3318 name. PHYSNAME is ignored..
3320 The result is allocated on the objfile_obstack and canonicalized. */
3323 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
3327 name
= dwarf2_name (die
, cu
);
3329 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
3330 compute it by typename_concat inside GDB. */
3331 if (cu
->language
== language_ada
3332 || (cu
->language
== language_fortran
&& physname
))
3334 /* For Ada unit, we prefer the linkage name over the name, as
3335 the former contains the exported name, which the user expects
3336 to be able to reference. Ideally, we want the user to be able
3337 to reference this entity using either natural or linkage name,
3338 but we haven't started looking at this enhancement yet. */
3339 struct attribute
*attr
;
3341 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
3343 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
3344 if (attr
&& DW_STRING (attr
))
3345 return DW_STRING (attr
);
3348 /* These are the only languages we know how to qualify names in. */
3350 && (cu
->language
== language_cplus
|| cu
->language
== language_java
3351 || cu
->language
== language_fortran
))
3353 if (die_needs_namespace (die
, cu
))
3357 struct ui_file
*buf
;
3359 prefix
= determine_prefix (die
, cu
);
3360 buf
= mem_fileopen ();
3361 if (*prefix
!= '\0')
3363 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
3366 fputs_unfiltered (prefixed_name
, buf
);
3367 xfree (prefixed_name
);
3370 fputs_unfiltered (name
? name
: "", buf
);
3372 /* For Java and C++ methods, append formal parameter type
3373 information, if PHYSNAME. */
3375 if (physname
&& die
->tag
== DW_TAG_subprogram
3376 && (cu
->language
== language_cplus
3377 || cu
->language
== language_java
))
3379 struct type
*type
= read_type_die (die
, cu
);
3381 c_type_print_args (type
, buf
, 0, cu
->language
);
3383 if (cu
->language
== language_java
)
3385 /* For java, we must append the return type to method
3387 if (die
->tag
== DW_TAG_subprogram
)
3388 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
3391 else if (cu
->language
== language_cplus
)
3393 if (TYPE_NFIELDS (type
) > 0
3394 && TYPE_FIELD_ARTIFICIAL (type
, 0)
3395 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
3396 fputs_unfiltered (" const", buf
);
3400 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
3402 ui_file_delete (buf
);
3404 if (cu
->language
== language_cplus
)
3407 = dwarf2_canonicalize_name (name
, cu
,
3408 &cu
->objfile
->objfile_obstack
);
3419 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3420 If scope qualifiers are appropriate they will be added. The result
3421 will be allocated on the objfile_obstack, or NULL if the DIE does
3422 not have a name. NAME may either be from a previous call to
3423 dwarf2_name or NULL.
3425 The output string will be canonicalized (if C++/Java). */
3428 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3430 return dwarf2_compute_name (name
, die
, cu
, 0);
3433 /* Construct a physname for the given DIE in CU. NAME may either be
3434 from a previous call to dwarf2_name or NULL. The result will be
3435 allocated on the objfile_objstack or NULL if the DIE does not have a
3438 The output string will be canonicalized (if C++/Java). */
3441 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3443 return dwarf2_compute_name (name
, die
, cu
, 1);
3446 /* Read the import statement specified by the given die and record it. */
3449 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3451 struct attribute
*import_attr
;
3452 struct die_info
*imported_die
;
3453 struct dwarf2_cu
*imported_cu
;
3454 const char *imported_name
;
3455 const char *imported_name_prefix
;
3456 const char *canonical_name
;
3457 const char *import_alias
;
3458 const char *imported_declaration
= NULL
;
3459 const char *import_prefix
;
3463 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3464 if (import_attr
== NULL
)
3466 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3467 dwarf_tag_name (die
->tag
));
3472 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3473 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3474 if (imported_name
== NULL
)
3476 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3478 The import in the following code:
3492 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3493 <52> DW_AT_decl_file : 1
3494 <53> DW_AT_decl_line : 6
3495 <54> DW_AT_import : <0x75>
3496 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3498 <5b> DW_AT_decl_file : 1
3499 <5c> DW_AT_decl_line : 2
3500 <5d> DW_AT_type : <0x6e>
3502 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3503 <76> DW_AT_byte_size : 4
3504 <77> DW_AT_encoding : 5 (signed)
3506 imports the wrong die ( 0x75 instead of 0x58 ).
3507 This case will be ignored until the gcc bug is fixed. */
3511 /* Figure out the local name after import. */
3512 import_alias
= dwarf2_name (die
, cu
);
3514 /* Figure out where the statement is being imported to. */
3515 import_prefix
= determine_prefix (die
, cu
);
3517 /* Figure out what the scope of the imported die is and prepend it
3518 to the name of the imported die. */
3519 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3521 if (imported_die
->tag
!= DW_TAG_namespace
3522 && imported_die
->tag
!= DW_TAG_module
)
3524 imported_declaration
= imported_name
;
3525 canonical_name
= imported_name_prefix
;
3527 else if (strlen (imported_name_prefix
) > 0)
3529 temp
= alloca (strlen (imported_name_prefix
)
3530 + 2 + strlen (imported_name
) + 1);
3531 strcpy (temp
, imported_name_prefix
);
3532 strcat (temp
, "::");
3533 strcat (temp
, imported_name
);
3534 canonical_name
= temp
;
3537 canonical_name
= imported_name
;
3539 cp_add_using_directive (import_prefix
,
3542 imported_declaration
,
3543 &cu
->objfile
->objfile_obstack
);
3547 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3549 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3553 free_cu_line_header (void *arg
)
3555 struct dwarf2_cu
*cu
= arg
;
3557 free_line_header (cu
->line_header
);
3558 cu
->line_header
= NULL
;
3562 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3564 struct objfile
*objfile
= cu
->objfile
;
3565 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3566 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3567 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3568 struct attribute
*attr
;
3570 char *comp_dir
= NULL
;
3571 struct die_info
*child_die
;
3572 bfd
*abfd
= objfile
->obfd
;
3573 struct line_header
*line_header
= 0;
3576 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3578 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3580 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3581 from finish_block. */
3582 if (lowpc
== ((CORE_ADDR
) -1))
3587 /* Find the filename. Do not use dwarf2_name here, since the filename
3588 is not a source language identifier. */
3589 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3592 name
= DW_STRING (attr
);
3595 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3597 comp_dir
= DW_STRING (attr
);
3598 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3600 comp_dir
= ldirname (name
);
3601 if (comp_dir
!= NULL
)
3602 make_cleanup (xfree
, comp_dir
);
3604 if (comp_dir
!= NULL
)
3606 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3607 directory, get rid of it. */
3608 char *cp
= strchr (comp_dir
, ':');
3610 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3617 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3620 set_cu_language (DW_UNSND (attr
), cu
);
3623 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3625 cu
->producer
= DW_STRING (attr
);
3627 /* We assume that we're processing GCC output. */
3628 processing_gcc_compilation
= 2;
3630 processing_has_namespace_info
= 0;
3632 start_symtab (name
, comp_dir
, lowpc
);
3633 record_debugformat ("DWARF 2");
3634 record_producer (cu
->producer
);
3636 initialize_cu_func_list (cu
);
3638 /* Decode line number information if present. We do this before
3639 processing child DIEs, so that the line header table is available
3640 for DW_AT_decl_file. */
3641 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3644 unsigned int line_offset
= DW_UNSND (attr
);
3645 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3648 cu
->line_header
= line_header
;
3649 make_cleanup (free_cu_line_header
, cu
);
3650 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3654 /* Process all dies in compilation unit. */
3655 if (die
->child
!= NULL
)
3657 child_die
= die
->child
;
3658 while (child_die
&& child_die
->tag
)
3660 process_die (child_die
, cu
);
3661 child_die
= sibling_die (child_die
);
3665 /* Decode macro information, if present. Dwarf 2 macro information
3666 refers to information in the line number info statement program
3667 header, so we can only read it if we've read the header
3669 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3670 if (attr
&& line_header
)
3672 unsigned int macro_offset
= DW_UNSND (attr
);
3674 dwarf_decode_macros (line_header
, macro_offset
,
3675 comp_dir
, abfd
, cu
);
3677 do_cleanups (back_to
);
3680 /* For TUs we want to skip the first top level sibling if it's not the
3681 actual type being defined by this TU. In this case the first top
3682 level sibling is there to provide context only. */
3685 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3687 struct objfile
*objfile
= cu
->objfile
;
3688 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3690 struct attribute
*attr
;
3692 char *comp_dir
= NULL
;
3693 struct die_info
*child_die
;
3694 bfd
*abfd
= objfile
->obfd
;
3696 /* start_symtab needs a low pc, but we don't really have one.
3697 Do what read_file_scope would do in the absence of such info. */
3698 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3700 /* Find the filename. Do not use dwarf2_name here, since the filename
3701 is not a source language identifier. */
3702 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3704 name
= DW_STRING (attr
);
3706 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3708 comp_dir
= DW_STRING (attr
);
3709 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3711 comp_dir
= ldirname (name
);
3712 if (comp_dir
!= NULL
)
3713 make_cleanup (xfree
, comp_dir
);
3719 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3721 set_cu_language (DW_UNSND (attr
), cu
);
3723 /* This isn't technically needed today. It is done for symmetry
3724 with read_file_scope. */
3725 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3727 cu
->producer
= DW_STRING (attr
);
3729 /* We assume that we're processing GCC output. */
3730 processing_gcc_compilation
= 2;
3732 processing_has_namespace_info
= 0;
3734 start_symtab (name
, comp_dir
, lowpc
);
3735 record_debugformat ("DWARF 2");
3736 record_producer (cu
->producer
);
3738 /* Process the dies in the type unit. */
3739 if (die
->child
== NULL
)
3741 dump_die_for_error (die
);
3742 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3743 bfd_get_filename (abfd
));
3746 child_die
= die
->child
;
3748 while (child_die
&& child_die
->tag
)
3750 process_die (child_die
, cu
);
3752 child_die
= sibling_die (child_die
);
3755 do_cleanups (back_to
);
3759 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3760 struct dwarf2_cu
*cu
)
3762 struct function_range
*thisfn
;
3764 thisfn
= (struct function_range
*)
3765 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3766 thisfn
->name
= name
;
3767 thisfn
->lowpc
= lowpc
;
3768 thisfn
->highpc
= highpc
;
3769 thisfn
->seen_line
= 0;
3770 thisfn
->next
= NULL
;
3772 if (cu
->last_fn
== NULL
)
3773 cu
->first_fn
= thisfn
;
3775 cu
->last_fn
->next
= thisfn
;
3777 cu
->last_fn
= thisfn
;
3780 /* qsort helper for inherit_abstract_dies. */
3783 unsigned_int_compar (const void *ap
, const void *bp
)
3785 unsigned int a
= *(unsigned int *) ap
;
3786 unsigned int b
= *(unsigned int *) bp
;
3788 return (a
> b
) - (b
> a
);
3791 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3792 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3793 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3796 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3798 struct die_info
*child_die
;
3799 unsigned die_children_count
;
3800 /* CU offsets which were referenced by children of the current DIE. */
3802 unsigned *offsets_end
, *offsetp
;
3803 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3804 struct die_info
*origin_die
;
3805 /* Iterator of the ORIGIN_DIE children. */
3806 struct die_info
*origin_child_die
;
3807 struct cleanup
*cleanups
;
3808 struct attribute
*attr
;
3810 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3814 origin_die
= follow_die_ref (die
, attr
, &cu
);
3815 if (die
->tag
!= origin_die
->tag
3816 && !(die
->tag
== DW_TAG_inlined_subroutine
3817 && origin_die
->tag
== DW_TAG_subprogram
))
3818 complaint (&symfile_complaints
,
3819 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3820 die
->offset
, origin_die
->offset
);
3822 child_die
= die
->child
;
3823 die_children_count
= 0;
3824 while (child_die
&& child_die
->tag
)
3826 child_die
= sibling_die (child_die
);
3827 die_children_count
++;
3829 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3830 cleanups
= make_cleanup (xfree
, offsets
);
3832 offsets_end
= offsets
;
3833 child_die
= die
->child
;
3834 while (child_die
&& child_die
->tag
)
3836 /* For each CHILD_DIE, find the corresponding child of
3837 ORIGIN_DIE. If there is more than one layer of
3838 DW_AT_abstract_origin, follow them all; there shouldn't be,
3839 but GCC versions at least through 4.4 generate this (GCC PR
3841 struct die_info
*child_origin_die
= child_die
;
3845 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3848 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3851 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3852 counterpart may exist. */
3853 if (child_origin_die
!= child_die
)
3855 if (child_die
->tag
!= child_origin_die
->tag
3856 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3857 && child_origin_die
->tag
== DW_TAG_subprogram
))
3858 complaint (&symfile_complaints
,
3859 _("Child DIE 0x%x and its abstract origin 0x%x have "
3860 "different tags"), child_die
->offset
,
3861 child_origin_die
->offset
);
3862 if (child_origin_die
->parent
!= origin_die
)
3863 complaint (&symfile_complaints
,
3864 _("Child DIE 0x%x and its abstract origin 0x%x have "
3865 "different parents"), child_die
->offset
,
3866 child_origin_die
->offset
);
3868 *offsets_end
++ = child_origin_die
->offset
;
3870 child_die
= sibling_die (child_die
);
3872 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3873 unsigned_int_compar
);
3874 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3875 if (offsetp
[-1] == *offsetp
)
3876 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3877 "to DIE 0x%x as their abstract origin"),
3878 die
->offset
, *offsetp
);
3881 origin_child_die
= origin_die
->child
;
3882 while (origin_child_die
&& origin_child_die
->tag
)
3884 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3885 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3887 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3889 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3890 process_die (origin_child_die
, cu
);
3892 origin_child_die
= sibling_die (origin_child_die
);
3895 do_cleanups (cleanups
);
3899 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3901 struct objfile
*objfile
= cu
->objfile
;
3902 struct context_stack
*new;
3905 struct die_info
*child_die
;
3906 struct attribute
*attr
, *call_line
, *call_file
;
3909 struct block
*block
;
3910 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3914 /* If we do not have call site information, we can't show the
3915 caller of this inlined function. That's too confusing, so
3916 only use the scope for local variables. */
3917 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3918 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3919 if (call_line
== NULL
|| call_file
== NULL
)
3921 read_lexical_block_scope (die
, cu
);
3926 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3928 name
= dwarf2_name (die
, cu
);
3930 /* Ignore functions with missing or empty names. These are actually
3931 illegal according to the DWARF standard. */
3934 complaint (&symfile_complaints
,
3935 _("missing name for subprogram DIE at %d"), die
->offset
);
3939 /* Ignore functions with missing or invalid low and high pc attributes. */
3940 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3942 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3943 if (!attr
|| !DW_UNSND (attr
))
3944 complaint (&symfile_complaints
,
3945 _("cannot get low and high bounds for subprogram DIE at %d"),
3953 /* Record the function range for dwarf_decode_lines. */
3954 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3956 new = push_context (0, lowpc
);
3957 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3959 /* If there is a location expression for DW_AT_frame_base, record
3961 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3963 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3964 expression is being recorded directly in the function's symbol
3965 and not in a separate frame-base object. I guess this hack is
3966 to avoid adding some sort of frame-base adjunct/annex to the
3967 function's symbol :-(. The problem with doing this is that it
3968 results in a function symbol with a location expression that
3969 has nothing to do with the location of the function, ouch! The
3970 relationship should be: a function's symbol has-a frame base; a
3971 frame-base has-a location expression. */
3972 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3974 cu
->list_in_scope
= &local_symbols
;
3976 if (die
->child
!= NULL
)
3978 child_die
= die
->child
;
3979 while (child_die
&& child_die
->tag
)
3981 process_die (child_die
, cu
);
3982 child_die
= sibling_die (child_die
);
3986 inherit_abstract_dies (die
, cu
);
3988 /* If we have a DW_AT_specification, we might need to import using
3989 directives from the context of the specification DIE. See the
3990 comment in determine_prefix. */
3991 if (cu
->language
== language_cplus
3992 && dwarf2_attr (die
, DW_AT_specification
, cu
))
3994 struct dwarf2_cu
*spec_cu
= cu
;
3995 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
3999 child_die
= spec_die
->child
;
4000 while (child_die
&& child_die
->tag
)
4002 if (child_die
->tag
== DW_TAG_imported_module
)
4003 process_die (child_die
, spec_cu
);
4004 child_die
= sibling_die (child_die
);
4007 /* In some cases, GCC generates specification DIEs that
4008 themselves contain DW_AT_specification attributes. */
4009 spec_die
= die_specification (spec_die
, &spec_cu
);
4013 new = pop_context ();
4014 /* Make a block for the local symbols within. */
4015 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
4016 lowpc
, highpc
, objfile
);
4018 /* For C++, set the block's scope. */
4019 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
4020 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
4021 determine_prefix (die
, cu
),
4022 processing_has_namespace_info
);
4024 /* If we have address ranges, record them. */
4025 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4027 /* In C++, we can have functions nested inside functions (e.g., when
4028 a function declares a class that has methods). This means that
4029 when we finish processing a function scope, we may need to go
4030 back to building a containing block's symbol lists. */
4031 local_symbols
= new->locals
;
4032 param_symbols
= new->params
;
4033 using_directives
= new->using_directives
;
4035 /* If we've finished processing a top-level function, subsequent
4036 symbols go in the file symbol list. */
4037 if (outermost_context_p ())
4038 cu
->list_in_scope
= &file_symbols
;
4041 /* Process all the DIES contained within a lexical block scope. Start
4042 a new scope, process the dies, and then close the scope. */
4045 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4047 struct objfile
*objfile
= cu
->objfile
;
4048 struct context_stack
*new;
4049 CORE_ADDR lowpc
, highpc
;
4050 struct die_info
*child_die
;
4053 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4055 /* Ignore blocks with missing or invalid low and high pc attributes. */
4056 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4057 as multiple lexical blocks? Handling children in a sane way would
4058 be nasty. Might be easier to properly extend generic blocks to
4060 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
4065 push_context (0, lowpc
);
4066 if (die
->child
!= NULL
)
4068 child_die
= die
->child
;
4069 while (child_die
&& child_die
->tag
)
4071 process_die (child_die
, cu
);
4072 child_die
= sibling_die (child_die
);
4075 new = pop_context ();
4077 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
4080 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
4083 /* Note that recording ranges after traversing children, as we
4084 do here, means that recording a parent's ranges entails
4085 walking across all its children's ranges as they appear in
4086 the address map, which is quadratic behavior.
4088 It would be nicer to record the parent's ranges before
4089 traversing its children, simply overriding whatever you find
4090 there. But since we don't even decide whether to create a
4091 block until after we've traversed its children, that's hard
4093 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4095 local_symbols
= new->locals
;
4096 using_directives
= new->using_directives
;
4099 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4100 Return 1 if the attributes are present and valid, otherwise, return 0.
4101 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4104 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
4105 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
4106 struct partial_symtab
*ranges_pst
)
4108 struct objfile
*objfile
= cu
->objfile
;
4109 struct comp_unit_head
*cu_header
= &cu
->header
;
4110 bfd
*obfd
= objfile
->obfd
;
4111 unsigned int addr_size
= cu_header
->addr_size
;
4112 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4113 /* Base address selection entry. */
4124 found_base
= cu
->base_known
;
4125 base
= cu
->base_address
;
4127 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
4128 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4130 complaint (&symfile_complaints
,
4131 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4135 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4137 /* Read in the largest possible address. */
4138 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4139 if ((marker
& mask
) == mask
)
4141 /* If we found the largest possible address, then
4142 read the base address. */
4143 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4144 buffer
+= 2 * addr_size
;
4145 offset
+= 2 * addr_size
;
4151 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4155 CORE_ADDR range_beginning
, range_end
;
4157 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4158 buffer
+= addr_size
;
4159 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4160 buffer
+= addr_size
;
4161 offset
+= 2 * addr_size
;
4163 /* An end of list marker is a pair of zero addresses. */
4164 if (range_beginning
== 0 && range_end
== 0)
4165 /* Found the end of list entry. */
4168 /* Each base address selection entry is a pair of 2 values.
4169 The first is the largest possible address, the second is
4170 the base address. Check for a base address here. */
4171 if ((range_beginning
& mask
) == mask
)
4173 /* If we found the largest possible address, then
4174 read the base address. */
4175 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4182 /* We have no valid base address for the ranges
4184 complaint (&symfile_complaints
,
4185 _("Invalid .debug_ranges data (no base address)"));
4189 range_beginning
+= base
;
4192 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4193 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4194 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4197 /* FIXME: This is recording everything as a low-high
4198 segment of consecutive addresses. We should have a
4199 data structure for discontiguous block ranges
4203 low
= range_beginning
;
4209 if (range_beginning
< low
)
4210 low
= range_beginning
;
4211 if (range_end
> high
)
4217 /* If the first entry is an end-of-list marker, the range
4218 describes an empty scope, i.e. no instructions. */
4224 *high_return
= high
;
4228 /* Get low and high pc attributes from a die. Return 1 if the attributes
4229 are present and valid, otherwise, return 0. Return -1 if the range is
4230 discontinuous, i.e. derived from DW_AT_ranges information. */
4232 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4233 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4234 struct partial_symtab
*pst
)
4236 struct attribute
*attr
;
4241 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4244 high
= DW_ADDR (attr
);
4245 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4247 low
= DW_ADDR (attr
);
4249 /* Found high w/o low attribute. */
4252 /* Found consecutive range of addresses. */
4257 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4260 /* Value of the DW_AT_ranges attribute is the offset in the
4261 .debug_ranges section. */
4262 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4264 /* Found discontinuous range of addresses. */
4272 /* When using the GNU linker, .gnu.linkonce. sections are used to
4273 eliminate duplicate copies of functions and vtables and such.
4274 The linker will arbitrarily choose one and discard the others.
4275 The AT_*_pc values for such functions refer to local labels in
4276 these sections. If the section from that file was discarded, the
4277 labels are not in the output, so the relocs get a value of 0.
4278 If this is a discarded function, mark the pc bounds as invalid,
4279 so that GDB will ignore it. */
4280 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4288 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4289 its low and high PC addresses. Do nothing if these addresses could not
4290 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4291 and HIGHPC to the high address if greater than HIGHPC. */
4294 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4295 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4296 struct dwarf2_cu
*cu
)
4298 CORE_ADDR low
, high
;
4299 struct die_info
*child
= die
->child
;
4301 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4303 *lowpc
= min (*lowpc
, low
);
4304 *highpc
= max (*highpc
, high
);
4307 /* If the language does not allow nested subprograms (either inside
4308 subprograms or lexical blocks), we're done. */
4309 if (cu
->language
!= language_ada
)
4312 /* Check all the children of the given DIE. If it contains nested
4313 subprograms, then check their pc bounds. Likewise, we need to
4314 check lexical blocks as well, as they may also contain subprogram
4316 while (child
&& child
->tag
)
4318 if (child
->tag
== DW_TAG_subprogram
4319 || child
->tag
== DW_TAG_lexical_block
)
4320 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4321 child
= sibling_die (child
);
4325 /* Get the low and high pc's represented by the scope DIE, and store
4326 them in *LOWPC and *HIGHPC. If the correct values can't be
4327 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4330 get_scope_pc_bounds (struct die_info
*die
,
4331 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4332 struct dwarf2_cu
*cu
)
4334 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4335 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4336 CORE_ADDR current_low
, current_high
;
4338 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4340 best_low
= current_low
;
4341 best_high
= current_high
;
4345 struct die_info
*child
= die
->child
;
4347 while (child
&& child
->tag
)
4349 switch (child
->tag
) {
4350 case DW_TAG_subprogram
:
4351 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4353 case DW_TAG_namespace
:
4355 /* FIXME: carlton/2004-01-16: Should we do this for
4356 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4357 that current GCC's always emit the DIEs corresponding
4358 to definitions of methods of classes as children of a
4359 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4360 the DIEs giving the declarations, which could be
4361 anywhere). But I don't see any reason why the
4362 standards says that they have to be there. */
4363 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4365 if (current_low
!= ((CORE_ADDR
) -1))
4367 best_low
= min (best_low
, current_low
);
4368 best_high
= max (best_high
, current_high
);
4376 child
= sibling_die (child
);
4381 *highpc
= best_high
;
4384 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4387 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4388 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4390 struct attribute
*attr
;
4392 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4395 CORE_ADDR high
= DW_ADDR (attr
);
4397 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4400 CORE_ADDR low
= DW_ADDR (attr
);
4402 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4406 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4409 bfd
*obfd
= cu
->objfile
->obfd
;
4411 /* The value of the DW_AT_ranges attribute is the offset of the
4412 address range list in the .debug_ranges section. */
4413 unsigned long offset
= DW_UNSND (attr
);
4414 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4416 /* For some target architectures, but not others, the
4417 read_address function sign-extends the addresses it returns.
4418 To recognize base address selection entries, we need a
4420 unsigned int addr_size
= cu
->header
.addr_size
;
4421 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4423 /* The base address, to which the next pair is relative. Note
4424 that this 'base' is a DWARF concept: most entries in a range
4425 list are relative, to reduce the number of relocs against the
4426 debugging information. This is separate from this function's
4427 'baseaddr' argument, which GDB uses to relocate debugging
4428 information from a shared library based on the address at
4429 which the library was loaded. */
4430 CORE_ADDR base
= cu
->base_address
;
4431 int base_known
= cu
->base_known
;
4433 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
4434 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4436 complaint (&symfile_complaints
,
4437 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4444 unsigned int bytes_read
;
4445 CORE_ADDR start
, end
;
4447 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4448 buffer
+= bytes_read
;
4449 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4450 buffer
+= bytes_read
;
4452 /* Did we find the end of the range list? */
4453 if (start
== 0 && end
== 0)
4456 /* Did we find a base address selection entry? */
4457 else if ((start
& base_select_mask
) == base_select_mask
)
4463 /* We found an ordinary address range. */
4468 complaint (&symfile_complaints
,
4469 _("Invalid .debug_ranges data (no base address)"));
4473 record_block_range (block
,
4474 baseaddr
+ base
+ start
,
4475 baseaddr
+ base
+ end
- 1);
4481 /* Add an aggregate field to the field list. */
4484 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4485 struct dwarf2_cu
*cu
)
4487 struct objfile
*objfile
= cu
->objfile
;
4488 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4489 struct nextfield
*new_field
;
4490 struct attribute
*attr
;
4492 char *fieldname
= "";
4494 /* Allocate a new field list entry and link it in. */
4495 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4496 make_cleanup (xfree
, new_field
);
4497 memset (new_field
, 0, sizeof (struct nextfield
));
4499 if (die
->tag
== DW_TAG_inheritance
)
4501 new_field
->next
= fip
->baseclasses
;
4502 fip
->baseclasses
= new_field
;
4506 new_field
->next
= fip
->fields
;
4507 fip
->fields
= new_field
;
4511 /* Handle accessibility and virtuality of field.
4512 The default accessibility for members is public, the default
4513 accessibility for inheritance is private. */
4514 if (die
->tag
!= DW_TAG_inheritance
)
4515 new_field
->accessibility
= DW_ACCESS_public
;
4517 new_field
->accessibility
= DW_ACCESS_private
;
4518 new_field
->virtuality
= DW_VIRTUALITY_none
;
4520 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4522 new_field
->accessibility
= DW_UNSND (attr
);
4523 if (new_field
->accessibility
!= DW_ACCESS_public
)
4524 fip
->non_public_fields
= 1;
4525 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4527 new_field
->virtuality
= DW_UNSND (attr
);
4529 fp
= &new_field
->field
;
4531 /* NOTE: According to the dwarf standard, static data members are
4532 indicated by having DW_AT_external.
4533 The check here for ! die_is_declaration is historical.
4534 This test is replicated in new_symbol. */
4536 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4538 /* Data member other than a C++ static data member. */
4540 /* Get type of field. */
4541 fp
->type
= die_type (die
, cu
);
4543 SET_FIELD_BITPOS (*fp
, 0);
4545 /* Get bit size of field (zero if none). */
4546 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4549 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4553 FIELD_BITSIZE (*fp
) = 0;
4556 /* Get bit offset of field. */
4557 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4560 int byte_offset
= 0;
4562 if (attr_form_is_section_offset (attr
))
4563 dwarf2_complex_location_expr_complaint ();
4564 else if (attr_form_is_constant (attr
))
4565 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4566 else if (attr_form_is_block (attr
))
4567 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4569 dwarf2_complex_location_expr_complaint ();
4571 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4573 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4576 if (gdbarch_bits_big_endian (gdbarch
))
4578 /* For big endian bits, the DW_AT_bit_offset gives the
4579 additional bit offset from the MSB of the containing
4580 anonymous object to the MSB of the field. We don't
4581 have to do anything special since we don't need to
4582 know the size of the anonymous object. */
4583 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4587 /* For little endian bits, compute the bit offset to the
4588 MSB of the anonymous object, subtract off the number of
4589 bits from the MSB of the field to the MSB of the
4590 object, and then subtract off the number of bits of
4591 the field itself. The result is the bit offset of
4592 the LSB of the field. */
4594 int bit_offset
= DW_UNSND (attr
);
4596 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4599 /* The size of the anonymous object containing
4600 the bit field is explicit, so use the
4601 indicated size (in bytes). */
4602 anonymous_size
= DW_UNSND (attr
);
4606 /* The size of the anonymous object containing
4607 the bit field must be inferred from the type
4608 attribute of the data member containing the
4610 anonymous_size
= TYPE_LENGTH (fp
->type
);
4612 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4613 - bit_offset
- FIELD_BITSIZE (*fp
);
4617 /* Get name of field. */
4618 fieldname
= dwarf2_name (die
, cu
);
4619 if (fieldname
== NULL
)
4622 /* The name is already allocated along with this objfile, so we don't
4623 need to duplicate it for the type. */
4624 fp
->name
= fieldname
;
4626 /* Change accessibility for artificial fields (e.g. virtual table
4627 pointer or virtual base class pointer) to private. */
4628 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4630 FIELD_ARTIFICIAL (*fp
) = 1;
4631 new_field
->accessibility
= DW_ACCESS_private
;
4632 fip
->non_public_fields
= 1;
4635 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4637 /* C++ static member. */
4639 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4640 is a declaration, but all versions of G++ as of this writing
4641 (so through at least 3.2.1) incorrectly generate
4642 DW_TAG_variable tags. */
4646 /* Get name of field. */
4647 fieldname
= dwarf2_name (die
, cu
);
4648 if (fieldname
== NULL
)
4651 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
4654 /* A static const member, not much different than an enum as far as
4655 we're concerned, except that we can support more types. */
4656 new_symbol (die
, NULL
, cu
);
4659 /* Get physical name. */
4660 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4662 /* The name is already allocated along with this objfile, so we don't
4663 need to duplicate it for the type. */
4664 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4665 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4666 FIELD_NAME (*fp
) = fieldname
;
4668 else if (die
->tag
== DW_TAG_inheritance
)
4670 /* C++ base class field. */
4671 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4674 int byte_offset
= 0;
4676 if (attr_form_is_section_offset (attr
))
4677 dwarf2_complex_location_expr_complaint ();
4678 else if (attr_form_is_constant (attr
))
4679 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4680 else if (attr_form_is_block (attr
))
4681 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4683 dwarf2_complex_location_expr_complaint ();
4685 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4687 FIELD_BITSIZE (*fp
) = 0;
4688 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4689 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4690 fip
->nbaseclasses
++;
4694 /* Add a typedef defined in the scope of the FIP's class. */
4697 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
4698 struct dwarf2_cu
*cu
)
4700 struct objfile
*objfile
= cu
->objfile
;
4701 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4702 struct typedef_field_list
*new_field
;
4703 struct attribute
*attr
;
4704 struct typedef_field
*fp
;
4705 char *fieldname
= "";
4707 /* Allocate a new field list entry and link it in. */
4708 new_field
= xzalloc (sizeof (*new_field
));
4709 make_cleanup (xfree
, new_field
);
4711 gdb_assert (die
->tag
== DW_TAG_typedef
);
4713 fp
= &new_field
->field
;
4715 /* Get name of field. */
4716 fp
->name
= dwarf2_name (die
, cu
);
4717 if (fp
->name
== NULL
)
4720 fp
->type
= read_type_die (die
, cu
);
4722 new_field
->next
= fip
->typedef_field_list
;
4723 fip
->typedef_field_list
= new_field
;
4724 fip
->typedef_field_list_count
++;
4727 /* Create the vector of fields, and attach it to the type. */
4730 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4731 struct dwarf2_cu
*cu
)
4733 int nfields
= fip
->nfields
;
4735 /* Record the field count, allocate space for the array of fields,
4736 and create blank accessibility bitfields if necessary. */
4737 TYPE_NFIELDS (type
) = nfields
;
4738 TYPE_FIELDS (type
) = (struct field
*)
4739 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4740 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4742 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4744 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4746 TYPE_FIELD_PRIVATE_BITS (type
) =
4747 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4748 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4750 TYPE_FIELD_PROTECTED_BITS (type
) =
4751 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4752 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4754 TYPE_FIELD_IGNORE_BITS (type
) =
4755 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4756 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4759 /* If the type has baseclasses, allocate and clear a bit vector for
4760 TYPE_FIELD_VIRTUAL_BITS. */
4761 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4763 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4764 unsigned char *pointer
;
4766 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4767 pointer
= TYPE_ALLOC (type
, num_bytes
);
4768 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4769 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4770 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4773 /* Copy the saved-up fields into the field vector. Start from the head
4774 of the list, adding to the tail of the field array, so that they end
4775 up in the same order in the array in which they were added to the list. */
4776 while (nfields
-- > 0)
4778 struct nextfield
*fieldp
;
4782 fieldp
= fip
->fields
;
4783 fip
->fields
= fieldp
->next
;
4787 fieldp
= fip
->baseclasses
;
4788 fip
->baseclasses
= fieldp
->next
;
4791 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4792 switch (fieldp
->accessibility
)
4794 case DW_ACCESS_private
:
4795 if (cu
->language
!= language_ada
)
4796 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4799 case DW_ACCESS_protected
:
4800 if (cu
->language
!= language_ada
)
4801 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4804 case DW_ACCESS_public
:
4808 /* Unknown accessibility. Complain and treat it as public. */
4810 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4811 fieldp
->accessibility
);
4815 if (nfields
< fip
->nbaseclasses
)
4817 switch (fieldp
->virtuality
)
4819 case DW_VIRTUALITY_virtual
:
4820 case DW_VIRTUALITY_pure_virtual
:
4821 if (cu
->language
== language_ada
)
4822 error ("unexpected virtuality in component of Ada type");
4823 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4830 /* Add a member function to the proper fieldlist. */
4833 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4834 struct type
*type
, struct dwarf2_cu
*cu
)
4836 struct objfile
*objfile
= cu
->objfile
;
4837 struct attribute
*attr
;
4838 struct fnfieldlist
*flp
;
4840 struct fn_field
*fnp
;
4843 struct nextfnfield
*new_fnfield
;
4844 struct type
*this_type
;
4846 if (cu
->language
== language_ada
)
4847 error ("unexpected member function in Ada type");
4849 /* Get name of member function. */
4850 fieldname
= dwarf2_name (die
, cu
);
4851 if (fieldname
== NULL
)
4854 /* Get the mangled name. */
4855 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4857 /* Look up member function name in fieldlist. */
4858 for (i
= 0; i
< fip
->nfnfields
; i
++)
4860 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4864 /* Create new list element if necessary. */
4865 if (i
< fip
->nfnfields
)
4866 flp
= &fip
->fnfieldlists
[i
];
4869 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4871 fip
->fnfieldlists
= (struct fnfieldlist
*)
4872 xrealloc (fip
->fnfieldlists
,
4873 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4874 * sizeof (struct fnfieldlist
));
4875 if (fip
->nfnfields
== 0)
4876 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4878 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4879 flp
->name
= fieldname
;
4885 /* Create a new member function field and chain it to the field list
4887 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4888 make_cleanup (xfree
, new_fnfield
);
4889 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4890 new_fnfield
->next
= flp
->head
;
4891 flp
->head
= new_fnfield
;
4894 /* Fill in the member function field info. */
4895 fnp
= &new_fnfield
->fnfield
;
4896 /* The name is already allocated along with this objfile, so we don't
4897 need to duplicate it for the type. */
4898 fnp
->physname
= physname
? physname
: "";
4899 fnp
->type
= alloc_type (objfile
);
4900 this_type
= read_type_die (die
, cu
);
4901 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4903 int nparams
= TYPE_NFIELDS (this_type
);
4905 /* TYPE is the domain of this method, and THIS_TYPE is the type
4906 of the method itself (TYPE_CODE_METHOD). */
4907 smash_to_method_type (fnp
->type
, type
,
4908 TYPE_TARGET_TYPE (this_type
),
4909 TYPE_FIELDS (this_type
),
4910 TYPE_NFIELDS (this_type
),
4911 TYPE_VARARGS (this_type
));
4913 /* Handle static member functions.
4914 Dwarf2 has no clean way to discern C++ static and non-static
4915 member functions. G++ helps GDB by marking the first
4916 parameter for non-static member functions (which is the
4917 this pointer) as artificial. We obtain this information
4918 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4919 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4920 fnp
->voffset
= VOFFSET_STATIC
;
4923 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4926 /* Get fcontext from DW_AT_containing_type if present. */
4927 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4928 fnp
->fcontext
= die_containing_type (die
, cu
);
4930 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4931 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4933 /* Get accessibility. */
4934 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4937 switch (DW_UNSND (attr
))
4939 case DW_ACCESS_private
:
4940 fnp
->is_private
= 1;
4942 case DW_ACCESS_protected
:
4943 fnp
->is_protected
= 1;
4948 /* Check for artificial methods. */
4949 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4950 if (attr
&& DW_UNSND (attr
) != 0)
4951 fnp
->is_artificial
= 1;
4953 /* Get index in virtual function table if it is a virtual member
4954 function. For older versions of GCC, this is an offset in the
4955 appropriate virtual table, as specified by DW_AT_containing_type.
4956 For everyone else, it is an expression to be evaluated relative
4957 to the object address. */
4959 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4962 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
4964 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
4966 /* Old-style GCC. */
4967 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4969 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
4970 || (DW_BLOCK (attr
)->size
> 1
4971 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
4972 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
4974 struct dwarf_block blk
;
4977 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
4979 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
4980 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
4981 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4982 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4983 dwarf2_complex_location_expr_complaint ();
4985 fnp
->voffset
/= cu
->header
.addr_size
;
4989 dwarf2_complex_location_expr_complaint ();
4992 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4994 else if (attr_form_is_section_offset (attr
))
4996 dwarf2_complex_location_expr_complaint ();
5000 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
5006 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
5007 if (attr
&& DW_UNSND (attr
))
5009 /* GCC does this, as of 2008-08-25; PR debug/37237. */
5010 complaint (&symfile_complaints
,
5011 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
5012 fieldname
, die
->offset
);
5013 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
5014 TYPE_CPLUS_DYNAMIC (type
) = 1;
5019 /* Create the vector of member function fields, and attach it to the type. */
5022 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
5023 struct dwarf2_cu
*cu
)
5025 struct fnfieldlist
*flp
;
5026 int total_length
= 0;
5029 if (cu
->language
== language_ada
)
5030 error ("unexpected member functions in Ada type");
5032 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
5033 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
5034 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
5036 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
5038 struct nextfnfield
*nfp
= flp
->head
;
5039 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
5042 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
5043 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
5044 fn_flp
->fn_fields
= (struct fn_field
*)
5045 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
5046 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
5047 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
5049 total_length
+= flp
->length
;
5052 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
5053 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
5056 /* Returns non-zero if NAME is the name of a vtable member in CU's
5057 language, zero otherwise. */
5059 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
5061 static const char vptr
[] = "_vptr";
5062 static const char vtable
[] = "vtable";
5064 /* Look for the C++ and Java forms of the vtable. */
5065 if ((cu
->language
== language_java
5066 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
5067 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
5068 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
5074 /* GCC outputs unnamed structures that are really pointers to member
5075 functions, with the ABI-specified layout. If TYPE describes
5076 such a structure, smash it into a member function type.
5078 GCC shouldn't do this; it should just output pointer to member DIEs.
5079 This is GCC PR debug/28767. */
5082 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
5084 struct type
*pfn_type
, *domain_type
, *new_type
;
5086 /* Check for a structure with no name and two children. */
5087 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
5090 /* Check for __pfn and __delta members. */
5091 if (TYPE_FIELD_NAME (type
, 0) == NULL
5092 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
5093 || TYPE_FIELD_NAME (type
, 1) == NULL
5094 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
5097 /* Find the type of the method. */
5098 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
5099 if (pfn_type
== NULL
5100 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
5101 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
5104 /* Look for the "this" argument. */
5105 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
5106 if (TYPE_NFIELDS (pfn_type
) == 0
5107 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5108 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
5111 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
5112 new_type
= alloc_type (objfile
);
5113 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
5114 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
5115 TYPE_VARARGS (pfn_type
));
5116 smash_to_methodptr_type (type
, new_type
);
5119 /* Called when we find the DIE that starts a structure or union scope
5120 (definition) to process all dies that define the members of the
5123 NOTE: we need to call struct_type regardless of whether or not the
5124 DIE has an at_name attribute, since it might be an anonymous
5125 structure or union. This gets the type entered into our set of
5128 However, if the structure is incomplete (an opaque struct/union)
5129 then suppress creating a symbol table entry for it since gdb only
5130 wants to find the one with the complete definition. Note that if
5131 it is complete, we just call new_symbol, which does it's own
5132 checking about whether the struct/union is anonymous or not (and
5133 suppresses creating a symbol table entry itself). */
5135 static struct type
*
5136 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5138 struct objfile
*objfile
= cu
->objfile
;
5140 struct attribute
*attr
;
5142 struct cleanup
*back_to
;
5144 /* If the definition of this type lives in .debug_types, read that type.
5145 Don't follow DW_AT_specification though, that will take us back up
5146 the chain and we want to go down. */
5147 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5150 struct dwarf2_cu
*type_cu
= cu
;
5151 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5153 /* We could just recurse on read_structure_type, but we need to call
5154 get_die_type to ensure only one type for this DIE is created.
5155 This is important, for example, because for c++ classes we need
5156 TYPE_NAME set which is only done by new_symbol. Blech. */
5157 type
= read_type_die (type_die
, type_cu
);
5158 return set_die_type (die
, type
, cu
);
5161 back_to
= make_cleanup (null_cleanup
, 0);
5163 type
= alloc_type (objfile
);
5164 INIT_CPLUS_SPECIFIC (type
);
5166 name
= dwarf2_name (die
, cu
);
5169 if (cu
->language
== language_cplus
5170 || cu
->language
== language_java
)
5172 TYPE_TAG_NAME (type
) = (char *) dwarf2_full_name (name
, die
, cu
);
5173 if (die
->tag
== DW_TAG_structure_type
5174 || die
->tag
== DW_TAG_class_type
)
5175 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5179 /* The name is already allocated along with this objfile, so
5180 we don't need to duplicate it for the type. */
5181 TYPE_TAG_NAME (type
) = (char *) name
;
5182 if (die
->tag
== DW_TAG_class_type
)
5183 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5187 if (die
->tag
== DW_TAG_structure_type
)
5189 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5191 else if (die
->tag
== DW_TAG_union_type
)
5193 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5197 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5200 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
5201 TYPE_DECLARED_CLASS (type
) = 1;
5203 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5206 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5210 TYPE_LENGTH (type
) = 0;
5213 TYPE_STUB_SUPPORTED (type
) = 1;
5214 if (die_is_declaration (die
, cu
))
5215 TYPE_STUB (type
) = 1;
5216 else if (attr
== NULL
&& die
->child
== NULL
5217 && producer_is_realview (cu
->producer
))
5218 /* RealView does not output the required DW_AT_declaration
5219 on incomplete types. */
5220 TYPE_STUB (type
) = 1;
5222 /* We need to add the type field to the die immediately so we don't
5223 infinitely recurse when dealing with pointers to the structure
5224 type within the structure itself. */
5225 set_die_type (die
, type
, cu
);
5227 /* set_die_type should be already done. */
5228 set_descriptive_type (type
, die
, cu
);
5230 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5232 struct field_info fi
;
5233 struct die_info
*child_die
;
5235 memset (&fi
, 0, sizeof (struct field_info
));
5237 child_die
= die
->child
;
5239 while (child_die
&& child_die
->tag
)
5241 if (child_die
->tag
== DW_TAG_member
5242 || child_die
->tag
== DW_TAG_variable
)
5244 /* NOTE: carlton/2002-11-05: A C++ static data member
5245 should be a DW_TAG_member that is a declaration, but
5246 all versions of G++ as of this writing (so through at
5247 least 3.2.1) incorrectly generate DW_TAG_variable
5248 tags for them instead. */
5249 dwarf2_add_field (&fi
, child_die
, cu
);
5251 else if (child_die
->tag
== DW_TAG_subprogram
)
5253 /* C++ member function. */
5254 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5256 else if (child_die
->tag
== DW_TAG_inheritance
)
5258 /* C++ base class field. */
5259 dwarf2_add_field (&fi
, child_die
, cu
);
5261 else if (child_die
->tag
== DW_TAG_typedef
)
5262 dwarf2_add_typedef (&fi
, child_die
, cu
);
5263 child_die
= sibling_die (child_die
);
5266 /* Attach fields and member functions to the type. */
5268 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5271 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5273 /* Get the type which refers to the base class (possibly this
5274 class itself) which contains the vtable pointer for the current
5275 class from the DW_AT_containing_type attribute. This use of
5276 DW_AT_containing_type is a GNU extension. */
5278 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5280 struct type
*t
= die_containing_type (die
, cu
);
5282 TYPE_VPTR_BASETYPE (type
) = t
;
5287 /* Our own class provides vtbl ptr. */
5288 for (i
= TYPE_NFIELDS (t
) - 1;
5289 i
>= TYPE_N_BASECLASSES (t
);
5292 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5294 if (is_vtable_name (fieldname
, cu
))
5296 TYPE_VPTR_FIELDNO (type
) = i
;
5301 /* Complain if virtual function table field not found. */
5302 if (i
< TYPE_N_BASECLASSES (t
))
5303 complaint (&symfile_complaints
,
5304 _("virtual function table pointer not found when defining class '%s'"),
5305 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5310 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5313 else if (cu
->producer
5314 && strncmp (cu
->producer
,
5315 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5317 /* The IBM XLC compiler does not provide direct indication
5318 of the containing type, but the vtable pointer is
5319 always named __vfp. */
5323 for (i
= TYPE_NFIELDS (type
) - 1;
5324 i
>= TYPE_N_BASECLASSES (type
);
5327 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5329 TYPE_VPTR_FIELDNO (type
) = i
;
5330 TYPE_VPTR_BASETYPE (type
) = type
;
5337 /* Copy fi.typedef_field_list linked list elements content into the
5338 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
5339 if (fi
.typedef_field_list
)
5341 int i
= fi
.typedef_field_list_count
;
5343 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
5344 TYPE_TYPEDEF_FIELD_ARRAY (type
)
5345 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
5346 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
5348 /* Reverse the list order to keep the debug info elements order. */
5351 struct typedef_field
*dest
, *src
;
5353 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
5354 src
= &fi
.typedef_field_list
->field
;
5355 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
5361 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5363 do_cleanups (back_to
);
5368 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5370 struct die_info
*child_die
= die
->child
;
5371 struct type
*this_type
;
5373 this_type
= get_die_type (die
, cu
);
5374 if (this_type
== NULL
)
5375 this_type
= read_structure_type (die
, cu
);
5377 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5378 snapshots) has been known to create a die giving a declaration
5379 for a class that has, as a child, a die giving a definition for a
5380 nested class. So we have to process our children even if the
5381 current die is a declaration. Normally, of course, a declaration
5382 won't have any children at all. */
5384 while (child_die
!= NULL
&& child_die
->tag
)
5386 if (child_die
->tag
== DW_TAG_member
5387 || child_die
->tag
== DW_TAG_variable
5388 || child_die
->tag
== DW_TAG_inheritance
)
5393 process_die (child_die
, cu
);
5395 child_die
= sibling_die (child_die
);
5398 /* Do not consider external references. According to the DWARF standard,
5399 these DIEs are identified by the fact that they have no byte_size
5400 attribute, and a declaration attribute. */
5401 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5402 || !die_is_declaration (die
, cu
))
5403 new_symbol (die
, this_type
, cu
);
5406 /* Given a DW_AT_enumeration_type die, set its type. We do not
5407 complete the type's fields yet, or create any symbols. */
5409 static struct type
*
5410 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5412 struct objfile
*objfile
= cu
->objfile
;
5414 struct attribute
*attr
;
5417 /* If the definition of this type lives in .debug_types, read that type.
5418 Don't follow DW_AT_specification though, that will take us back up
5419 the chain and we want to go down. */
5420 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5423 struct dwarf2_cu
*type_cu
= cu
;
5424 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5426 type
= read_type_die (type_die
, type_cu
);
5427 return set_die_type (die
, type
, cu
);
5430 type
= alloc_type (objfile
);
5432 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5433 name
= dwarf2_full_name (NULL
, die
, cu
);
5435 TYPE_TAG_NAME (type
) = (char *) name
;
5437 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5440 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5444 TYPE_LENGTH (type
) = 0;
5447 /* The enumeration DIE can be incomplete. In Ada, any type can be
5448 declared as private in the package spec, and then defined only
5449 inside the package body. Such types are known as Taft Amendment
5450 Types. When another package uses such a type, an incomplete DIE
5451 may be generated by the compiler. */
5452 if (die_is_declaration (die
, cu
))
5453 TYPE_STUB (type
) = 1;
5455 return set_die_type (die
, type
, cu
);
5458 /* Given a pointer to a die which begins an enumeration, process all
5459 the dies that define the members of the enumeration, and create the
5460 symbol for the enumeration type.
5462 NOTE: We reverse the order of the element list. */
5465 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5467 struct die_info
*child_die
;
5468 struct field
*fields
;
5471 int unsigned_enum
= 1;
5473 struct type
*this_type
;
5477 this_type
= get_die_type (die
, cu
);
5478 if (this_type
== NULL
)
5479 this_type
= read_enumeration_type (die
, cu
);
5480 if (die
->child
!= NULL
)
5482 child_die
= die
->child
;
5483 while (child_die
&& child_die
->tag
)
5485 if (child_die
->tag
!= DW_TAG_enumerator
)
5487 process_die (child_die
, cu
);
5491 name
= dwarf2_name (child_die
, cu
);
5494 sym
= new_symbol (child_die
, this_type
, cu
);
5495 if (SYMBOL_VALUE (sym
) < 0)
5498 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5500 fields
= (struct field
*)
5502 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5503 * sizeof (struct field
));
5506 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5507 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5508 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5509 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5515 child_die
= sibling_die (child_die
);
5520 TYPE_NFIELDS (this_type
) = num_fields
;
5521 TYPE_FIELDS (this_type
) = (struct field
*)
5522 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5523 memcpy (TYPE_FIELDS (this_type
), fields
,
5524 sizeof (struct field
) * num_fields
);
5528 TYPE_UNSIGNED (this_type
) = 1;
5531 new_symbol (die
, this_type
, cu
);
5534 /* Extract all information from a DW_TAG_array_type DIE and put it in
5535 the DIE's type field. For now, this only handles one dimensional
5538 static struct type
*
5539 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5541 struct objfile
*objfile
= cu
->objfile
;
5542 struct die_info
*child_die
;
5544 struct type
*element_type
, *range_type
, *index_type
;
5545 struct type
**range_types
= NULL
;
5546 struct attribute
*attr
;
5548 struct cleanup
*back_to
;
5551 element_type
= die_type (die
, cu
);
5553 /* The die_type call above may have already set the type for this DIE. */
5554 type
= get_die_type (die
, cu
);
5558 /* Irix 6.2 native cc creates array types without children for
5559 arrays with unspecified length. */
5560 if (die
->child
== NULL
)
5562 index_type
= objfile_type (objfile
)->builtin_int
;
5563 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5564 type
= create_array_type (NULL
, element_type
, range_type
);
5565 return set_die_type (die
, type
, cu
);
5568 back_to
= make_cleanup (null_cleanup
, NULL
);
5569 child_die
= die
->child
;
5570 while (child_die
&& child_die
->tag
)
5572 if (child_die
->tag
== DW_TAG_subrange_type
)
5574 struct type
*child_type
= read_type_die (child_die
, cu
);
5576 if (child_type
!= NULL
)
5578 /* The range type was succesfully read. Save it for
5579 the array type creation. */
5580 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5582 range_types
= (struct type
**)
5583 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5584 * sizeof (struct type
*));
5586 make_cleanup (free_current_contents
, &range_types
);
5588 range_types
[ndim
++] = child_type
;
5591 child_die
= sibling_die (child_die
);
5594 /* Dwarf2 dimensions are output from left to right, create the
5595 necessary array types in backwards order. */
5597 type
= element_type
;
5599 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5604 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5609 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5612 /* Understand Dwarf2 support for vector types (like they occur on
5613 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5614 array type. This is not part of the Dwarf2/3 standard yet, but a
5615 custom vendor extension. The main difference between a regular
5616 array and the vector variant is that vectors are passed by value
5618 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5620 make_vector_type (type
);
5622 name
= dwarf2_name (die
, cu
);
5624 TYPE_NAME (type
) = name
;
5626 /* Install the type in the die. */
5627 set_die_type (die
, type
, cu
);
5629 /* set_die_type should be already done. */
5630 set_descriptive_type (type
, die
, cu
);
5632 do_cleanups (back_to
);
5637 static enum dwarf_array_dim_ordering
5638 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5640 struct attribute
*attr
;
5642 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5644 if (attr
) return DW_SND (attr
);
5647 GNU F77 is a special case, as at 08/2004 array type info is the
5648 opposite order to the dwarf2 specification, but data is still
5649 laid out as per normal fortran.
5651 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5655 if (cu
->language
== language_fortran
5656 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5658 return DW_ORD_row_major
;
5661 switch (cu
->language_defn
->la_array_ordering
)
5663 case array_column_major
:
5664 return DW_ORD_col_major
;
5665 case array_row_major
:
5667 return DW_ORD_row_major
;
5671 /* Extract all information from a DW_TAG_set_type DIE and put it in
5672 the DIE's type field. */
5674 static struct type
*
5675 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5677 struct type
*domain_type
, *set_type
;
5678 struct attribute
*attr
;
5680 domain_type
= die_type (die
, cu
);
5682 /* The die_type call above may have already set the type for this DIE. */
5683 set_type
= get_die_type (die
, cu
);
5687 set_type
= create_set_type (NULL
, domain_type
);
5689 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5691 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
5693 return set_die_type (die
, set_type
, cu
);
5696 /* First cut: install each common block member as a global variable. */
5699 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5701 struct die_info
*child_die
;
5702 struct attribute
*attr
;
5704 CORE_ADDR base
= (CORE_ADDR
) 0;
5706 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5709 /* Support the .debug_loc offsets */
5710 if (attr_form_is_block (attr
))
5712 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5714 else if (attr_form_is_section_offset (attr
))
5716 dwarf2_complex_location_expr_complaint ();
5720 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5721 "common block member");
5724 if (die
->child
!= NULL
)
5726 child_die
= die
->child
;
5727 while (child_die
&& child_die
->tag
)
5729 sym
= new_symbol (child_die
, NULL
, cu
);
5730 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5733 CORE_ADDR byte_offset
= 0;
5735 if (attr_form_is_section_offset (attr
))
5736 dwarf2_complex_location_expr_complaint ();
5737 else if (attr_form_is_constant (attr
))
5738 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5739 else if (attr_form_is_block (attr
))
5740 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5742 dwarf2_complex_location_expr_complaint ();
5744 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5745 add_symbol_to_list (sym
, &global_symbols
);
5747 child_die
= sibling_die (child_die
);
5752 /* Create a type for a C++ namespace. */
5754 static struct type
*
5755 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5757 struct objfile
*objfile
= cu
->objfile
;
5758 const char *previous_prefix
, *name
;
5762 /* For extensions, reuse the type of the original namespace. */
5763 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5765 struct die_info
*ext_die
;
5766 struct dwarf2_cu
*ext_cu
= cu
;
5768 ext_die
= dwarf2_extension (die
, &ext_cu
);
5769 type
= read_type_die (ext_die
, ext_cu
);
5770 return set_die_type (die
, type
, cu
);
5773 name
= namespace_name (die
, &is_anonymous
, cu
);
5775 /* Now build the name of the current namespace. */
5777 previous_prefix
= determine_prefix (die
, cu
);
5778 if (previous_prefix
[0] != '\0')
5779 name
= typename_concat (&objfile
->objfile_obstack
,
5780 previous_prefix
, name
, 0, cu
);
5782 /* Create the type. */
5783 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5785 TYPE_NAME (type
) = (char *) name
;
5786 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5788 return set_die_type (die
, type
, cu
);
5791 /* Read a C++ namespace. */
5794 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5796 struct objfile
*objfile
= cu
->objfile
;
5800 /* Add a symbol associated to this if we haven't seen the namespace
5801 before. Also, add a using directive if it's an anonymous
5804 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5808 type
= read_type_die (die
, cu
);
5809 new_symbol (die
, type
, cu
);
5811 name
= namespace_name (die
, &is_anonymous
, cu
);
5814 const char *previous_prefix
= determine_prefix (die
, cu
);
5816 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
5817 NULL
, &objfile
->objfile_obstack
);
5821 if (die
->child
!= NULL
)
5823 struct die_info
*child_die
= die
->child
;
5825 while (child_die
&& child_die
->tag
)
5827 process_die (child_die
, cu
);
5828 child_die
= sibling_die (child_die
);
5833 /* Read a Fortran module as type. This DIE can be only a declaration used for
5834 imported module. Still we need that type as local Fortran "use ... only"
5835 declaration imports depend on the created type in determine_prefix. */
5837 static struct type
*
5838 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5840 struct objfile
*objfile
= cu
->objfile
;
5844 module_name
= dwarf2_name (die
, cu
);
5846 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
5848 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
5850 /* determine_prefix uses TYPE_TAG_NAME. */
5851 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5853 return set_die_type (die
, type
, cu
);
5856 /* Read a Fortran module. */
5859 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5861 struct die_info
*child_die
= die
->child
;
5863 while (child_die
&& child_die
->tag
)
5865 process_die (child_die
, cu
);
5866 child_die
= sibling_die (child_die
);
5870 /* Return the name of the namespace represented by DIE. Set
5871 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5875 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5877 struct die_info
*current_die
;
5878 const char *name
= NULL
;
5880 /* Loop through the extensions until we find a name. */
5882 for (current_die
= die
;
5883 current_die
!= NULL
;
5884 current_die
= dwarf2_extension (die
, &cu
))
5886 name
= dwarf2_name (current_die
, cu
);
5891 /* Is it an anonymous namespace? */
5893 *is_anonymous
= (name
== NULL
);
5895 name
= "(anonymous namespace)";
5900 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5901 the user defined type vector. */
5903 static struct type
*
5904 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5906 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5907 struct comp_unit_head
*cu_header
= &cu
->header
;
5909 struct attribute
*attr_byte_size
;
5910 struct attribute
*attr_address_class
;
5911 int byte_size
, addr_class
;
5912 struct type
*target_type
;
5914 target_type
= die_type (die
, cu
);
5916 /* The die_type call above may have already set the type for this DIE. */
5917 type
= get_die_type (die
, cu
);
5921 type
= lookup_pointer_type (target_type
);
5923 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5925 byte_size
= DW_UNSND (attr_byte_size
);
5927 byte_size
= cu_header
->addr_size
;
5929 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5930 if (attr_address_class
)
5931 addr_class
= DW_UNSND (attr_address_class
);
5933 addr_class
= DW_ADDR_none
;
5935 /* If the pointer size or address class is different than the
5936 default, create a type variant marked as such and set the
5937 length accordingly. */
5938 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5940 if (gdbarch_address_class_type_flags_p (gdbarch
))
5944 type_flags
= gdbarch_address_class_type_flags
5945 (gdbarch
, byte_size
, addr_class
);
5946 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5948 type
= make_type_with_address_space (type
, type_flags
);
5950 else if (TYPE_LENGTH (type
) != byte_size
)
5952 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5956 /* Should we also complain about unhandled address classes? */
5960 TYPE_LENGTH (type
) = byte_size
;
5961 return set_die_type (die
, type
, cu
);
5964 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5965 the user defined type vector. */
5967 static struct type
*
5968 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5971 struct type
*to_type
;
5972 struct type
*domain
;
5974 to_type
= die_type (die
, cu
);
5975 domain
= die_containing_type (die
, cu
);
5977 /* The calls above may have already set the type for this DIE. */
5978 type
= get_die_type (die
, cu
);
5982 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5983 type
= lookup_methodptr_type (to_type
);
5985 type
= lookup_memberptr_type (to_type
, domain
);
5987 return set_die_type (die
, type
, cu
);
5990 /* Extract all information from a DW_TAG_reference_type DIE and add to
5991 the user defined type vector. */
5993 static struct type
*
5994 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5996 struct comp_unit_head
*cu_header
= &cu
->header
;
5997 struct type
*type
, *target_type
;
5998 struct attribute
*attr
;
6000 target_type
= die_type (die
, cu
);
6002 /* The die_type call above may have already set the type for this DIE. */
6003 type
= get_die_type (die
, cu
);
6007 type
= lookup_reference_type (target_type
);
6008 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6011 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6015 TYPE_LENGTH (type
) = cu_header
->addr_size
;
6017 return set_die_type (die
, type
, cu
);
6020 static struct type
*
6021 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6023 struct type
*base_type
, *cv_type
;
6025 base_type
= die_type (die
, cu
);
6027 /* The die_type call above may have already set the type for this DIE. */
6028 cv_type
= get_die_type (die
, cu
);
6032 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
6033 return set_die_type (die
, cv_type
, cu
);
6036 static struct type
*
6037 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6039 struct type
*base_type
, *cv_type
;
6041 base_type
= die_type (die
, cu
);
6043 /* The die_type call above may have already set the type for this DIE. */
6044 cv_type
= get_die_type (die
, cu
);
6048 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
6049 return set_die_type (die
, cv_type
, cu
);
6052 /* Extract all information from a DW_TAG_string_type DIE and add to
6053 the user defined type vector. It isn't really a user defined type,
6054 but it behaves like one, with other DIE's using an AT_user_def_type
6055 attribute to reference it. */
6057 static struct type
*
6058 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6060 struct objfile
*objfile
= cu
->objfile
;
6061 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6062 struct type
*type
, *range_type
, *index_type
, *char_type
;
6063 struct attribute
*attr
;
6064 unsigned int length
;
6066 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
6069 length
= DW_UNSND (attr
);
6073 /* check for the DW_AT_byte_size attribute */
6074 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6077 length
= DW_UNSND (attr
);
6085 index_type
= objfile_type (objfile
)->builtin_int
;
6086 range_type
= create_range_type (NULL
, index_type
, 1, length
);
6087 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
6088 type
= create_string_type (NULL
, char_type
, range_type
);
6090 return set_die_type (die
, type
, cu
);
6093 /* Handle DIES due to C code like:
6097 int (*funcp)(int a, long l);
6101 ('funcp' generates a DW_TAG_subroutine_type DIE)
6104 static struct type
*
6105 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6107 struct type
*type
; /* Type that this function returns */
6108 struct type
*ftype
; /* Function that returns above type */
6109 struct attribute
*attr
;
6111 type
= die_type (die
, cu
);
6113 /* The die_type call above may have already set the type for this DIE. */
6114 ftype
= get_die_type (die
, cu
);
6118 ftype
= lookup_function_type (type
);
6120 /* All functions in C++, Pascal and Java have prototypes. */
6121 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
6122 if ((attr
&& (DW_UNSND (attr
) != 0))
6123 || cu
->language
== language_cplus
6124 || cu
->language
== language_java
6125 || cu
->language
== language_pascal
)
6126 TYPE_PROTOTYPED (ftype
) = 1;
6127 else if (producer_is_realview (cu
->producer
))
6128 /* RealView does not emit DW_AT_prototyped. We can not
6129 distinguish prototyped and unprototyped functions; default to
6130 prototyped, since that is more common in modern code (and
6131 RealView warns about unprototyped functions). */
6132 TYPE_PROTOTYPED (ftype
) = 1;
6134 /* Store the calling convention in the type if it's available in
6135 the subroutine die. Otherwise set the calling convention to
6136 the default value DW_CC_normal. */
6137 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
6138 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
6140 /* We need to add the subroutine type to the die immediately so
6141 we don't infinitely recurse when dealing with parameters
6142 declared as the same subroutine type. */
6143 set_die_type (die
, ftype
, cu
);
6145 if (die
->child
!= NULL
)
6147 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
6148 struct die_info
*child_die
;
6149 int nparams
, iparams
;
6151 /* Count the number of parameters.
6152 FIXME: GDB currently ignores vararg functions, but knows about
6153 vararg member functions. */
6155 child_die
= die
->child
;
6156 while (child_die
&& child_die
->tag
)
6158 if (child_die
->tag
== DW_TAG_formal_parameter
)
6160 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
6161 TYPE_VARARGS (ftype
) = 1;
6162 child_die
= sibling_die (child_die
);
6165 /* Allocate storage for parameters and fill them in. */
6166 TYPE_NFIELDS (ftype
) = nparams
;
6167 TYPE_FIELDS (ftype
) = (struct field
*)
6168 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
6170 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
6171 even if we error out during the parameters reading below. */
6172 for (iparams
= 0; iparams
< nparams
; iparams
++)
6173 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
6176 child_die
= die
->child
;
6177 while (child_die
&& child_die
->tag
)
6179 if (child_die
->tag
== DW_TAG_formal_parameter
)
6181 /* Dwarf2 has no clean way to discern C++ static and non-static
6182 member functions. G++ helps GDB by marking the first
6183 parameter for non-static member functions (which is the
6184 this pointer) as artificial. We pass this information
6185 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
6186 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
6188 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
6191 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
6193 /* GCC/43521: In java, the formal parameter
6194 "this" is sometimes not marked with DW_AT_artificial. */
6195 if (cu
->language
== language_java
)
6197 const char *name
= dwarf2_name (child_die
, cu
);
6199 if (name
&& !strcmp (name
, "this"))
6200 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
6203 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
6206 child_die
= sibling_die (child_die
);
6213 static struct type
*
6214 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
6216 struct objfile
*objfile
= cu
->objfile
;
6217 const char *name
= NULL
;
6218 struct type
*this_type
;
6220 name
= dwarf2_full_name (NULL
, die
, cu
);
6221 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
6222 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
6223 TYPE_NAME (this_type
) = (char *) name
;
6224 set_die_type (die
, this_type
, cu
);
6225 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
6229 /* Find a representation of a given base type and install
6230 it in the TYPE field of the die. */
6232 static struct type
*
6233 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6235 struct objfile
*objfile
= cu
->objfile
;
6237 struct attribute
*attr
;
6238 int encoding
= 0, size
= 0;
6240 enum type_code code
= TYPE_CODE_INT
;
6242 struct type
*target_type
= NULL
;
6244 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
6247 encoding
= DW_UNSND (attr
);
6249 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6252 size
= DW_UNSND (attr
);
6254 name
= dwarf2_name (die
, cu
);
6257 complaint (&symfile_complaints
,
6258 _("DW_AT_name missing from DW_TAG_base_type"));
6263 case DW_ATE_address
:
6264 /* Turn DW_ATE_address into a void * pointer. */
6265 code
= TYPE_CODE_PTR
;
6266 type_flags
|= TYPE_FLAG_UNSIGNED
;
6267 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
6269 case DW_ATE_boolean
:
6270 code
= TYPE_CODE_BOOL
;
6271 type_flags
|= TYPE_FLAG_UNSIGNED
;
6273 case DW_ATE_complex_float
:
6274 code
= TYPE_CODE_COMPLEX
;
6275 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6277 case DW_ATE_decimal_float
:
6278 code
= TYPE_CODE_DECFLOAT
;
6281 code
= TYPE_CODE_FLT
;
6285 case DW_ATE_unsigned
:
6286 type_flags
|= TYPE_FLAG_UNSIGNED
;
6288 case DW_ATE_signed_char
:
6289 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6290 || cu
->language
== language_pascal
)
6291 code
= TYPE_CODE_CHAR
;
6293 case DW_ATE_unsigned_char
:
6294 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6295 || cu
->language
== language_pascal
)
6296 code
= TYPE_CODE_CHAR
;
6297 type_flags
|= TYPE_FLAG_UNSIGNED
;
6300 /* We just treat this as an integer and then recognize the
6301 type by name elsewhere. */
6305 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6306 dwarf_type_encoding_name (encoding
));
6310 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6311 TYPE_NAME (type
) = name
;
6312 TYPE_TARGET_TYPE (type
) = target_type
;
6314 if (name
&& strcmp (name
, "char") == 0)
6315 TYPE_NOSIGN (type
) = 1;
6317 return set_die_type (die
, type
, cu
);
6320 /* Read the given DW_AT_subrange DIE. */
6322 static struct type
*
6323 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6325 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6326 struct type
*base_type
;
6327 struct type
*range_type
;
6328 struct attribute
*attr
;
6332 LONGEST negative_mask
;
6334 base_type
= die_type (die
, cu
);
6336 /* The die_type call above may have already set the type for this DIE. */
6337 range_type
= get_die_type (die
, cu
);
6341 if (cu
->language
== language_fortran
)
6343 /* FORTRAN implies a lower bound of 1, if not given. */
6347 /* FIXME: For variable sized arrays either of these could be
6348 a variable rather than a constant value. We'll allow it,
6349 but we don't know how to handle it. */
6350 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6352 low
= dwarf2_get_attr_constant_value (attr
, 0);
6354 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6357 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
6359 /* GCC encodes arrays with unspecified or dynamic length
6360 with a DW_FORM_block1 attribute or a reference attribute.
6361 FIXME: GDB does not yet know how to handle dynamic
6362 arrays properly, treat them as arrays with unspecified
6365 FIXME: jimb/2003-09-22: GDB does not really know
6366 how to handle arrays of unspecified length
6367 either; we just represent them as zero-length
6368 arrays. Choose an appropriate upper bound given
6369 the lower bound we've computed above. */
6373 high
= dwarf2_get_attr_constant_value (attr
, 1);
6377 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
6380 int count
= dwarf2_get_attr_constant_value (attr
, 1);
6381 high
= low
+ count
- 1;
6385 /* Dwarf-2 specifications explicitly allows to create subrange types
6386 without specifying a base type.
6387 In that case, the base type must be set to the type of
6388 the lower bound, upper bound or count, in that order, if any of these
6389 three attributes references an object that has a type.
6390 If no base type is found, the Dwarf-2 specifications say that
6391 a signed integer type of size equal to the size of an address should
6393 For the following C code: `extern char gdb_int [];'
6394 GCC produces an empty range DIE.
6395 FIXME: muller/2010-05-28: Possible references to object for low bound,
6396 high bound or count are not yet handled by this code.
6398 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6400 struct objfile
*objfile
= cu
->objfile
;
6401 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6402 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
6403 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
6405 /* Test "int", "long int", and "long long int" objfile types,
6406 and select the first one having a size above or equal to the
6407 architecture address size. */
6408 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6409 base_type
= int_type
;
6412 int_type
= objfile_type (objfile
)->builtin_long
;
6413 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6414 base_type
= int_type
;
6417 int_type
= objfile_type (objfile
)->builtin_long_long
;
6418 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6419 base_type
= int_type
;
6425 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6426 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6427 low
|= negative_mask
;
6428 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6429 high
|= negative_mask
;
6431 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6433 /* Mark arrays with dynamic length at least as an array of unspecified
6434 length. GDB could check the boundary but before it gets implemented at
6435 least allow accessing the array elements. */
6436 if (attr
&& attr
->form
== DW_FORM_block1
)
6437 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
6439 name
= dwarf2_name (die
, cu
);
6441 TYPE_NAME (range_type
) = name
;
6443 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6445 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6447 set_die_type (die
, range_type
, cu
);
6449 /* set_die_type should be already done. */
6450 set_descriptive_type (range_type
, die
, cu
);
6455 static struct type
*
6456 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6460 /* For now, we only support the C meaning of an unspecified type: void. */
6462 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6463 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6465 return set_die_type (die
, type
, cu
);
6468 /* Trivial hash function for die_info: the hash value of a DIE
6469 is its offset in .debug_info for this objfile. */
6472 die_hash (const void *item
)
6474 const struct die_info
*die
= item
;
6479 /* Trivial comparison function for die_info structures: two DIEs
6480 are equal if they have the same offset. */
6483 die_eq (const void *item_lhs
, const void *item_rhs
)
6485 const struct die_info
*die_lhs
= item_lhs
;
6486 const struct die_info
*die_rhs
= item_rhs
;
6488 return die_lhs
->offset
== die_rhs
->offset
;
6491 /* Read a whole compilation unit into a linked list of dies. */
6493 static struct die_info
*
6494 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6496 struct die_reader_specs reader_specs
;
6498 gdb_assert (cu
->die_hash
== NULL
);
6500 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6504 &cu
->comp_unit_obstack
,
6505 hashtab_obstack_allocate
,
6506 dummy_obstack_deallocate
);
6508 init_cu_die_reader (&reader_specs
, cu
);
6510 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6513 /* Main entry point for reading a DIE and all children.
6514 Read the DIE and dump it if requested. */
6516 static struct die_info
*
6517 read_die_and_children (const struct die_reader_specs
*reader
,
6519 gdb_byte
**new_info_ptr
,
6520 struct die_info
*parent
)
6522 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6523 new_info_ptr
, parent
);
6525 if (dwarf2_die_debug
)
6527 fprintf_unfiltered (gdb_stdlog
,
6528 "\nRead die from %s of %s:\n",
6529 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6531 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6533 : "unknown section",
6534 reader
->abfd
->filename
);
6535 dump_die (result
, dwarf2_die_debug
);
6541 /* Read a single die and all its descendents. Set the die's sibling
6542 field to NULL; set other fields in the die correctly, and set all
6543 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6544 location of the info_ptr after reading all of those dies. PARENT
6545 is the parent of the die in question. */
6547 static struct die_info
*
6548 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6550 gdb_byte
**new_info_ptr
,
6551 struct die_info
*parent
)
6553 struct die_info
*die
;
6557 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6560 *new_info_ptr
= cur_ptr
;
6563 store_in_ref_table (die
, reader
->cu
);
6566 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6570 *new_info_ptr
= cur_ptr
;
6573 die
->sibling
= NULL
;
6574 die
->parent
= parent
;
6578 /* Read a die, all of its descendents, and all of its siblings; set
6579 all of the fields of all of the dies correctly. Arguments are as
6580 in read_die_and_children. */
6582 static struct die_info
*
6583 read_die_and_siblings (const struct die_reader_specs
*reader
,
6585 gdb_byte
**new_info_ptr
,
6586 struct die_info
*parent
)
6588 struct die_info
*first_die
, *last_sibling
;
6592 first_die
= last_sibling
= NULL
;
6596 struct die_info
*die
6597 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6601 *new_info_ptr
= cur_ptr
;
6608 last_sibling
->sibling
= die
;
6614 /* Read the die from the .debug_info section buffer. Set DIEP to
6615 point to a newly allocated die with its information, except for its
6616 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6617 whether the die has children or not. */
6620 read_full_die (const struct die_reader_specs
*reader
,
6621 struct die_info
**diep
, gdb_byte
*info_ptr
,
6624 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6625 struct abbrev_info
*abbrev
;
6626 struct die_info
*die
;
6627 struct dwarf2_cu
*cu
= reader
->cu
;
6628 bfd
*abfd
= reader
->abfd
;
6630 offset
= info_ptr
- reader
->buffer
;
6631 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6632 info_ptr
+= bytes_read
;
6640 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6642 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6644 bfd_get_filename (abfd
));
6646 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6647 die
->offset
= offset
;
6648 die
->tag
= abbrev
->tag
;
6649 die
->abbrev
= abbrev_number
;
6651 die
->num_attrs
= abbrev
->num_attrs
;
6653 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6654 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6655 abfd
, info_ptr
, cu
);
6658 *has_children
= abbrev
->has_children
;
6662 /* In DWARF version 2, the description of the debugging information is
6663 stored in a separate .debug_abbrev section. Before we read any
6664 dies from a section we read in all abbreviations and install them
6665 in a hash table. This function also sets flags in CU describing
6666 the data found in the abbrev table. */
6669 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6671 struct comp_unit_head
*cu_header
= &cu
->header
;
6672 gdb_byte
*abbrev_ptr
;
6673 struct abbrev_info
*cur_abbrev
;
6674 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6675 unsigned int abbrev_form
, hash_number
;
6676 struct attr_abbrev
*cur_attrs
;
6677 unsigned int allocated_attrs
;
6679 /* Initialize dwarf2 abbrevs */
6680 obstack_init (&cu
->abbrev_obstack
);
6681 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6683 * sizeof (struct abbrev_info
*)));
6684 memset (cu
->dwarf2_abbrevs
, 0,
6685 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6687 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
6688 &dwarf2_per_objfile
->abbrev
);
6689 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6690 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6691 abbrev_ptr
+= bytes_read
;
6693 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6694 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6696 /* loop until we reach an abbrev number of 0 */
6697 while (abbrev_number
)
6699 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6701 /* read in abbrev header */
6702 cur_abbrev
->number
= abbrev_number
;
6703 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6704 abbrev_ptr
+= bytes_read
;
6705 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6708 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6709 cu
->has_namespace_info
= 1;
6711 /* now read in declarations */
6712 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6713 abbrev_ptr
+= bytes_read
;
6714 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6715 abbrev_ptr
+= bytes_read
;
6718 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6720 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6722 = xrealloc (cur_attrs
, (allocated_attrs
6723 * sizeof (struct attr_abbrev
)));
6726 /* Record whether this compilation unit might have
6727 inter-compilation-unit references. If we don't know what form
6728 this attribute will have, then it might potentially be a
6729 DW_FORM_ref_addr, so we conservatively expect inter-CU
6732 if (abbrev_form
== DW_FORM_ref_addr
6733 || abbrev_form
== DW_FORM_indirect
)
6734 cu
->has_form_ref_addr
= 1;
6736 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6737 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6738 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6739 abbrev_ptr
+= bytes_read
;
6740 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6741 abbrev_ptr
+= bytes_read
;
6744 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6745 (cur_abbrev
->num_attrs
6746 * sizeof (struct attr_abbrev
)));
6747 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6748 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6750 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6751 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6752 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6754 /* Get next abbreviation.
6755 Under Irix6 the abbreviations for a compilation unit are not
6756 always properly terminated with an abbrev number of 0.
6757 Exit loop if we encounter an abbreviation which we have
6758 already read (which means we are about to read the abbreviations
6759 for the next compile unit) or if the end of the abbreviation
6760 table is reached. */
6761 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6762 >= dwarf2_per_objfile
->abbrev
.size
)
6764 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6765 abbrev_ptr
+= bytes_read
;
6766 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6773 /* Release the memory used by the abbrev table for a compilation unit. */
6776 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6778 struct dwarf2_cu
*cu
= ptr_to_cu
;
6780 obstack_free (&cu
->abbrev_obstack
, NULL
);
6781 cu
->dwarf2_abbrevs
= NULL
;
6784 /* Lookup an abbrev_info structure in the abbrev hash table. */
6786 static struct abbrev_info
*
6787 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6789 unsigned int hash_number
;
6790 struct abbrev_info
*abbrev
;
6792 hash_number
= number
% ABBREV_HASH_SIZE
;
6793 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6797 if (abbrev
->number
== number
)
6800 abbrev
= abbrev
->next
;
6805 /* Returns nonzero if TAG represents a type that we might generate a partial
6809 is_type_tag_for_partial (int tag
)
6814 /* Some types that would be reasonable to generate partial symbols for,
6815 that we don't at present. */
6816 case DW_TAG_array_type
:
6817 case DW_TAG_file_type
:
6818 case DW_TAG_ptr_to_member_type
:
6819 case DW_TAG_set_type
:
6820 case DW_TAG_string_type
:
6821 case DW_TAG_subroutine_type
:
6823 case DW_TAG_base_type
:
6824 case DW_TAG_class_type
:
6825 case DW_TAG_interface_type
:
6826 case DW_TAG_enumeration_type
:
6827 case DW_TAG_structure_type
:
6828 case DW_TAG_subrange_type
:
6829 case DW_TAG_typedef
:
6830 case DW_TAG_union_type
:
6837 /* Load all DIEs that are interesting for partial symbols into memory. */
6839 static struct partial_die_info
*
6840 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6841 int building_psymtab
, struct dwarf2_cu
*cu
)
6843 struct partial_die_info
*part_die
;
6844 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6845 struct abbrev_info
*abbrev
;
6846 unsigned int bytes_read
;
6847 unsigned int load_all
= 0;
6849 int nesting_level
= 1;
6854 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6858 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6862 &cu
->comp_unit_obstack
,
6863 hashtab_obstack_allocate
,
6864 dummy_obstack_deallocate
);
6866 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6867 sizeof (struct partial_die_info
));
6871 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6873 /* A NULL abbrev means the end of a series of children. */
6876 if (--nesting_level
== 0)
6878 /* PART_DIE was probably the last thing allocated on the
6879 comp_unit_obstack, so we could call obstack_free
6880 here. We don't do that because the waste is small,
6881 and will be cleaned up when we're done with this
6882 compilation unit. This way, we're also more robust
6883 against other users of the comp_unit_obstack. */
6886 info_ptr
+= bytes_read
;
6887 last_die
= parent_die
;
6888 parent_die
= parent_die
->die_parent
;
6892 /* Check whether this DIE is interesting enough to save. Normally
6893 we would not be interested in members here, but there may be
6894 later variables referencing them via DW_AT_specification (for
6897 && !is_type_tag_for_partial (abbrev
->tag
)
6898 && abbrev
->tag
!= DW_TAG_enumerator
6899 && abbrev
->tag
!= DW_TAG_subprogram
6900 && abbrev
->tag
!= DW_TAG_lexical_block
6901 && abbrev
->tag
!= DW_TAG_variable
6902 && abbrev
->tag
!= DW_TAG_namespace
6903 && abbrev
->tag
!= DW_TAG_module
6904 && abbrev
->tag
!= DW_TAG_member
)
6906 /* Otherwise we skip to the next sibling, if any. */
6907 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6911 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6912 buffer
, info_ptr
, cu
);
6914 /* This two-pass algorithm for processing partial symbols has a
6915 high cost in cache pressure. Thus, handle some simple cases
6916 here which cover the majority of C partial symbols. DIEs
6917 which neither have specification tags in them, nor could have
6918 specification tags elsewhere pointing at them, can simply be
6919 processed and discarded.
6921 This segment is also optional; scan_partial_symbols and
6922 add_partial_symbol will handle these DIEs if we chain
6923 them in normally. When compilers which do not emit large
6924 quantities of duplicate debug information are more common,
6925 this code can probably be removed. */
6927 /* Any complete simple types at the top level (pretty much all
6928 of them, for a language without namespaces), can be processed
6930 if (parent_die
== NULL
6931 && part_die
->has_specification
== 0
6932 && part_die
->is_declaration
== 0
6933 && (part_die
->tag
== DW_TAG_typedef
6934 || part_die
->tag
== DW_TAG_base_type
6935 || part_die
->tag
== DW_TAG_subrange_type
))
6937 if (building_psymtab
&& part_die
->name
!= NULL
)
6938 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6939 VAR_DOMAIN
, LOC_TYPEDEF
,
6940 &cu
->objfile
->static_psymbols
,
6941 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6942 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6946 /* If we're at the second level, and we're an enumerator, and
6947 our parent has no specification (meaning possibly lives in a
6948 namespace elsewhere), then we can add the partial symbol now
6949 instead of queueing it. */
6950 if (part_die
->tag
== DW_TAG_enumerator
6951 && parent_die
!= NULL
6952 && parent_die
->die_parent
== NULL
6953 && parent_die
->tag
== DW_TAG_enumeration_type
6954 && parent_die
->has_specification
== 0)
6956 if (part_die
->name
== NULL
)
6957 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6958 else if (building_psymtab
)
6959 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6960 VAR_DOMAIN
, LOC_CONST
,
6961 (cu
->language
== language_cplus
6962 || cu
->language
== language_java
)
6963 ? &cu
->objfile
->global_psymbols
6964 : &cu
->objfile
->static_psymbols
,
6965 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6967 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6971 /* We'll save this DIE so link it in. */
6972 part_die
->die_parent
= parent_die
;
6973 part_die
->die_sibling
= NULL
;
6974 part_die
->die_child
= NULL
;
6976 if (last_die
&& last_die
== parent_die
)
6977 last_die
->die_child
= part_die
;
6979 last_die
->die_sibling
= part_die
;
6981 last_die
= part_die
;
6983 if (first_die
== NULL
)
6984 first_die
= part_die
;
6986 /* Maybe add the DIE to the hash table. Not all DIEs that we
6987 find interesting need to be in the hash table, because we
6988 also have the parent/sibling/child chains; only those that we
6989 might refer to by offset later during partial symbol reading.
6991 For now this means things that might have be the target of a
6992 DW_AT_specification, DW_AT_abstract_origin, or
6993 DW_AT_extension. DW_AT_extension will refer only to
6994 namespaces; DW_AT_abstract_origin refers to functions (and
6995 many things under the function DIE, but we do not recurse
6996 into function DIEs during partial symbol reading) and
6997 possibly variables as well; DW_AT_specification refers to
6998 declarations. Declarations ought to have the DW_AT_declaration
6999 flag. It happens that GCC forgets to put it in sometimes, but
7000 only for functions, not for types.
7002 Adding more things than necessary to the hash table is harmless
7003 except for the performance cost. Adding too few will result in
7004 wasted time in find_partial_die, when we reread the compilation
7005 unit with load_all_dies set. */
7008 || abbrev
->tag
== DW_TAG_subprogram
7009 || abbrev
->tag
== DW_TAG_variable
7010 || abbrev
->tag
== DW_TAG_namespace
7011 || part_die
->is_declaration
)
7015 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
7016 part_die
->offset
, INSERT
);
7020 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
7021 sizeof (struct partial_die_info
));
7023 /* For some DIEs we want to follow their children (if any). For C
7024 we have no reason to follow the children of structures; for other
7025 languages we have to, both so that we can get at method physnames
7026 to infer fully qualified class names, and for DW_AT_specification.
7028 For Ada, we need to scan the children of subprograms and lexical
7029 blocks as well because Ada allows the definition of nested
7030 entities that could be interesting for the debugger, such as
7031 nested subprograms for instance. */
7032 if (last_die
->has_children
7034 || last_die
->tag
== DW_TAG_namespace
7035 || last_die
->tag
== DW_TAG_module
7036 || last_die
->tag
== DW_TAG_enumeration_type
7037 || (cu
->language
!= language_c
7038 && (last_die
->tag
== DW_TAG_class_type
7039 || last_die
->tag
== DW_TAG_interface_type
7040 || last_die
->tag
== DW_TAG_structure_type
7041 || last_die
->tag
== DW_TAG_union_type
))
7042 || (cu
->language
== language_ada
7043 && (last_die
->tag
== DW_TAG_subprogram
7044 || last_die
->tag
== DW_TAG_lexical_block
))))
7047 parent_die
= last_die
;
7051 /* Otherwise we skip to the next sibling, if any. */
7052 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
7054 /* Back to the top, do it again. */
7058 /* Read a minimal amount of information into the minimal die structure. */
7061 read_partial_die (struct partial_die_info
*part_die
,
7062 struct abbrev_info
*abbrev
,
7063 unsigned int abbrev_len
, bfd
*abfd
,
7064 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
7065 struct dwarf2_cu
*cu
)
7068 struct attribute attr
;
7069 int has_low_pc_attr
= 0;
7070 int has_high_pc_attr
= 0;
7072 memset (part_die
, 0, sizeof (struct partial_die_info
));
7074 part_die
->offset
= info_ptr
- buffer
;
7076 info_ptr
+= abbrev_len
;
7081 part_die
->tag
= abbrev
->tag
;
7082 part_die
->has_children
= abbrev
->has_children
;
7084 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
7086 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
7088 /* Store the data if it is of an attribute we want to keep in a
7089 partial symbol table. */
7093 switch (part_die
->tag
)
7095 case DW_TAG_compile_unit
:
7096 case DW_TAG_type_unit
:
7097 /* Compilation units have a DW_AT_name that is a filename, not
7098 a source language identifier. */
7099 case DW_TAG_enumeration_type
:
7100 case DW_TAG_enumerator
:
7101 /* These tags always have simple identifiers already; no need
7102 to canonicalize them. */
7103 part_die
->name
= DW_STRING (&attr
);
7107 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
7108 &cu
->objfile
->objfile_obstack
);
7112 case DW_AT_linkage_name
:
7113 case DW_AT_MIPS_linkage_name
:
7114 /* Note that both forms of linkage name might appear. We
7115 assume they will be the same, and we only store the last
7117 if (cu
->language
== language_ada
)
7118 part_die
->name
= DW_STRING (&attr
);
7121 has_low_pc_attr
= 1;
7122 part_die
->lowpc
= DW_ADDR (&attr
);
7125 has_high_pc_attr
= 1;
7126 part_die
->highpc
= DW_ADDR (&attr
);
7128 case DW_AT_location
:
7129 /* Support the .debug_loc offsets */
7130 if (attr_form_is_block (&attr
))
7132 part_die
->locdesc
= DW_BLOCK (&attr
);
7134 else if (attr_form_is_section_offset (&attr
))
7136 dwarf2_complex_location_expr_complaint ();
7140 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7141 "partial symbol information");
7144 case DW_AT_external
:
7145 part_die
->is_external
= DW_UNSND (&attr
);
7147 case DW_AT_declaration
:
7148 part_die
->is_declaration
= DW_UNSND (&attr
);
7151 part_die
->has_type
= 1;
7153 case DW_AT_abstract_origin
:
7154 case DW_AT_specification
:
7155 case DW_AT_extension
:
7156 part_die
->has_specification
= 1;
7157 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
7160 /* Ignore absolute siblings, they might point outside of
7161 the current compile unit. */
7162 if (attr
.form
== DW_FORM_ref_addr
)
7163 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
7165 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
7167 case DW_AT_byte_size
:
7168 part_die
->has_byte_size
= 1;
7170 case DW_AT_calling_convention
:
7171 /* DWARF doesn't provide a way to identify a program's source-level
7172 entry point. DW_AT_calling_convention attributes are only meant
7173 to describe functions' calling conventions.
7175 However, because it's a necessary piece of information in
7176 Fortran, and because DW_CC_program is the only piece of debugging
7177 information whose definition refers to a 'main program' at all,
7178 several compilers have begun marking Fortran main programs with
7179 DW_CC_program --- even when those functions use the standard
7180 calling conventions.
7182 So until DWARF specifies a way to provide this information and
7183 compilers pick up the new representation, we'll support this
7185 if (DW_UNSND (&attr
) == DW_CC_program
7186 && cu
->language
== language_fortran
)
7187 set_main_name (part_die
->name
);
7194 /* When using the GNU linker, .gnu.linkonce. sections are used to
7195 eliminate duplicate copies of functions and vtables and such.
7196 The linker will arbitrarily choose one and discard the others.
7197 The AT_*_pc values for such functions refer to local labels in
7198 these sections. If the section from that file was discarded, the
7199 labels are not in the output, so the relocs get a value of 0.
7200 If this is a discarded function, mark the pc bounds as invalid,
7201 so that GDB will ignore it. */
7202 if (has_low_pc_attr
&& has_high_pc_attr
7203 && part_die
->lowpc
< part_die
->highpc
7204 && (part_die
->lowpc
!= 0
7205 || dwarf2_per_objfile
->has_section_at_zero
))
7206 part_die
->has_pc_info
= 1;
7211 /* Find a cached partial DIE at OFFSET in CU. */
7213 static struct partial_die_info
*
7214 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
7216 struct partial_die_info
*lookup_die
= NULL
;
7217 struct partial_die_info part_die
;
7219 part_die
.offset
= offset
;
7220 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
7225 /* Find a partial DIE at OFFSET, which may or may not be in CU,
7226 except in the case of .debug_types DIEs which do not reference
7227 outside their CU (they do however referencing other types via
7230 static struct partial_die_info
*
7231 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
7233 struct dwarf2_per_cu_data
*per_cu
= NULL
;
7234 struct partial_die_info
*pd
= NULL
;
7236 if (cu
->per_cu
->from_debug_types
)
7238 pd
= find_partial_die_in_comp_unit (offset
, cu
);
7244 if (offset_in_cu_p (&cu
->header
, offset
))
7246 pd
= find_partial_die_in_comp_unit (offset
, cu
);
7251 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
7253 if (per_cu
->cu
== NULL
)
7255 load_partial_comp_unit (per_cu
, cu
->objfile
);
7256 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7257 dwarf2_per_objfile
->read_in_chain
= per_cu
;
7260 per_cu
->cu
->last_used
= 0;
7261 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7263 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
7265 struct cleanup
*back_to
;
7266 struct partial_die_info comp_unit_die
;
7267 struct abbrev_info
*abbrev
;
7268 unsigned int bytes_read
;
7271 per_cu
->load_all_dies
= 1;
7273 /* Re-read the DIEs. */
7274 back_to
= make_cleanup (null_cleanup
, 0);
7275 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
7277 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
7278 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
7280 info_ptr
= (dwarf2_per_objfile
->info
.buffer
7281 + per_cu
->cu
->header
.offset
7282 + per_cu
->cu
->header
.first_die_offset
);
7283 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
7284 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
7285 per_cu
->cu
->objfile
->obfd
,
7286 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7288 if (comp_unit_die
.has_children
)
7289 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
7290 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7292 do_cleanups (back_to
);
7294 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7300 internal_error (__FILE__
, __LINE__
,
7301 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7302 offset
, bfd_get_filename (cu
->objfile
->obfd
));
7306 /* Adjust PART_DIE before generating a symbol for it. This function
7307 may set the is_external flag or change the DIE's name. */
7310 fixup_partial_die (struct partial_die_info
*part_die
,
7311 struct dwarf2_cu
*cu
)
7313 /* If we found a reference attribute and the DIE has no name, try
7314 to find a name in the referred to DIE. */
7316 if (part_die
->name
== NULL
&& part_die
->has_specification
)
7318 struct partial_die_info
*spec_die
;
7320 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
7322 fixup_partial_die (spec_die
, cu
);
7326 part_die
->name
= spec_die
->name
;
7328 /* Copy DW_AT_external attribute if it is set. */
7329 if (spec_die
->is_external
)
7330 part_die
->is_external
= spec_die
->is_external
;
7334 /* Set default names for some unnamed DIEs. */
7335 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
7336 || part_die
->tag
== DW_TAG_class_type
))
7337 part_die
->name
= "(anonymous class)";
7339 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
7340 part_die
->name
= "(anonymous namespace)";
7342 if (part_die
->tag
== DW_TAG_structure_type
7343 || part_die
->tag
== DW_TAG_class_type
7344 || part_die
->tag
== DW_TAG_union_type
)
7345 guess_structure_name (part_die
, cu
);
7348 /* Read an attribute value described by an attribute form. */
7351 read_attribute_value (struct attribute
*attr
, unsigned form
,
7352 bfd
*abfd
, gdb_byte
*info_ptr
,
7353 struct dwarf2_cu
*cu
)
7355 struct comp_unit_head
*cu_header
= &cu
->header
;
7356 unsigned int bytes_read
;
7357 struct dwarf_block
*blk
;
7362 case DW_FORM_ref_addr
:
7363 if (cu
->header
.version
== 2)
7364 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7366 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7367 info_ptr
+= bytes_read
;
7370 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7371 info_ptr
+= bytes_read
;
7373 case DW_FORM_block2
:
7374 blk
= dwarf_alloc_block (cu
);
7375 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7377 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7378 info_ptr
+= blk
->size
;
7379 DW_BLOCK (attr
) = blk
;
7381 case DW_FORM_block4
:
7382 blk
= dwarf_alloc_block (cu
);
7383 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7385 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7386 info_ptr
+= blk
->size
;
7387 DW_BLOCK (attr
) = blk
;
7390 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7394 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7398 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7401 case DW_FORM_sec_offset
:
7402 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7403 info_ptr
+= bytes_read
;
7405 case DW_FORM_string
:
7406 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7407 DW_STRING_IS_CANONICAL (attr
) = 0;
7408 info_ptr
+= bytes_read
;
7411 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7413 DW_STRING_IS_CANONICAL (attr
) = 0;
7414 info_ptr
+= bytes_read
;
7416 case DW_FORM_exprloc
:
7418 blk
= dwarf_alloc_block (cu
);
7419 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7420 info_ptr
+= bytes_read
;
7421 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7422 info_ptr
+= blk
->size
;
7423 DW_BLOCK (attr
) = blk
;
7425 case DW_FORM_block1
:
7426 blk
= dwarf_alloc_block (cu
);
7427 blk
->size
= read_1_byte (abfd
, info_ptr
);
7429 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7430 info_ptr
+= blk
->size
;
7431 DW_BLOCK (attr
) = blk
;
7434 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7438 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7441 case DW_FORM_flag_present
:
7442 DW_UNSND (attr
) = 1;
7445 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7446 info_ptr
+= bytes_read
;
7449 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7450 info_ptr
+= bytes_read
;
7453 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7457 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7461 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7465 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7469 /* Convert the signature to something we can record in DW_UNSND
7471 NOTE: This is NULL if the type wasn't found. */
7472 DW_SIGNATURED_TYPE (attr
) =
7473 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7476 case DW_FORM_ref_udata
:
7477 DW_ADDR (attr
) = (cu
->header
.offset
7478 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7479 info_ptr
+= bytes_read
;
7481 case DW_FORM_indirect
:
7482 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7483 info_ptr
+= bytes_read
;
7484 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7487 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7488 dwarf_form_name (form
),
7489 bfd_get_filename (abfd
));
7492 /* We have seen instances where the compiler tried to emit a byte
7493 size attribute of -1 which ended up being encoded as an unsigned
7494 0xffffffff. Although 0xffffffff is technically a valid size value,
7495 an object of this size seems pretty unlikely so we can relatively
7496 safely treat these cases as if the size attribute was invalid and
7497 treat them as zero by default. */
7498 if (attr
->name
== DW_AT_byte_size
7499 && form
== DW_FORM_data4
7500 && DW_UNSND (attr
) >= 0xffffffff)
7503 (&symfile_complaints
,
7504 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7505 hex_string (DW_UNSND (attr
)));
7506 DW_UNSND (attr
) = 0;
7512 /* Read an attribute described by an abbreviated attribute. */
7515 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7516 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7518 attr
->name
= abbrev
->name
;
7519 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7522 /* read dwarf information from a buffer */
7525 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7527 return bfd_get_8 (abfd
, buf
);
7531 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7533 return bfd_get_signed_8 (abfd
, buf
);
7537 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7539 return bfd_get_16 (abfd
, buf
);
7543 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7545 return bfd_get_signed_16 (abfd
, buf
);
7549 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7551 return bfd_get_32 (abfd
, buf
);
7555 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7557 return bfd_get_signed_32 (abfd
, buf
);
7561 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7563 return bfd_get_64 (abfd
, buf
);
7567 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7568 unsigned int *bytes_read
)
7570 struct comp_unit_head
*cu_header
= &cu
->header
;
7571 CORE_ADDR retval
= 0;
7573 if (cu_header
->signed_addr_p
)
7575 switch (cu_header
->addr_size
)
7578 retval
= bfd_get_signed_16 (abfd
, buf
);
7581 retval
= bfd_get_signed_32 (abfd
, buf
);
7584 retval
= bfd_get_signed_64 (abfd
, buf
);
7587 internal_error (__FILE__
, __LINE__
,
7588 _("read_address: bad switch, signed [in module %s]"),
7589 bfd_get_filename (abfd
));
7594 switch (cu_header
->addr_size
)
7597 retval
= bfd_get_16 (abfd
, buf
);
7600 retval
= bfd_get_32 (abfd
, buf
);
7603 retval
= bfd_get_64 (abfd
, buf
);
7606 internal_error (__FILE__
, __LINE__
,
7607 _("read_address: bad switch, unsigned [in module %s]"),
7608 bfd_get_filename (abfd
));
7612 *bytes_read
= cu_header
->addr_size
;
7616 /* Read the initial length from a section. The (draft) DWARF 3
7617 specification allows the initial length to take up either 4 bytes
7618 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7619 bytes describe the length and all offsets will be 8 bytes in length
7622 An older, non-standard 64-bit format is also handled by this
7623 function. The older format in question stores the initial length
7624 as an 8-byte quantity without an escape value. Lengths greater
7625 than 2^32 aren't very common which means that the initial 4 bytes
7626 is almost always zero. Since a length value of zero doesn't make
7627 sense for the 32-bit format, this initial zero can be considered to
7628 be an escape value which indicates the presence of the older 64-bit
7629 format. As written, the code can't detect (old format) lengths
7630 greater than 4GB. If it becomes necessary to handle lengths
7631 somewhat larger than 4GB, we could allow other small values (such
7632 as the non-sensical values of 1, 2, and 3) to also be used as
7633 escape values indicating the presence of the old format.
7635 The value returned via bytes_read should be used to increment the
7636 relevant pointer after calling read_initial_length().
7638 [ Note: read_initial_length() and read_offset() are based on the
7639 document entitled "DWARF Debugging Information Format", revision
7640 3, draft 8, dated November 19, 2001. This document was obtained
7643 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7645 This document is only a draft and is subject to change. (So beware.)
7647 Details regarding the older, non-standard 64-bit format were
7648 determined empirically by examining 64-bit ELF files produced by
7649 the SGI toolchain on an IRIX 6.5 machine.
7651 - Kevin, July 16, 2002
7655 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7657 LONGEST length
= bfd_get_32 (abfd
, buf
);
7659 if (length
== 0xffffffff)
7661 length
= bfd_get_64 (abfd
, buf
+ 4);
7664 else if (length
== 0)
7666 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7667 length
= bfd_get_64 (abfd
, buf
);
7678 /* Cover function for read_initial_length.
7679 Returns the length of the object at BUF, and stores the size of the
7680 initial length in *BYTES_READ and stores the size that offsets will be in
7682 If the initial length size is not equivalent to that specified in
7683 CU_HEADER then issue a complaint.
7684 This is useful when reading non-comp-unit headers. */
7687 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7688 const struct comp_unit_head
*cu_header
,
7689 unsigned int *bytes_read
,
7690 unsigned int *offset_size
)
7692 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7694 gdb_assert (cu_header
->initial_length_size
== 4
7695 || cu_header
->initial_length_size
== 8
7696 || cu_header
->initial_length_size
== 12);
7698 if (cu_header
->initial_length_size
!= *bytes_read
)
7699 complaint (&symfile_complaints
,
7700 _("intermixed 32-bit and 64-bit DWARF sections"));
7702 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7706 /* Read an offset from the data stream. The size of the offset is
7707 given by cu_header->offset_size. */
7710 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7711 unsigned int *bytes_read
)
7713 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7715 *bytes_read
= cu_header
->offset_size
;
7719 /* Read an offset from the data stream. */
7722 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7726 switch (offset_size
)
7729 retval
= bfd_get_32 (abfd
, buf
);
7732 retval
= bfd_get_64 (abfd
, buf
);
7735 internal_error (__FILE__
, __LINE__
,
7736 _("read_offset_1: bad switch [in module %s]"),
7737 bfd_get_filename (abfd
));
7744 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7746 /* If the size of a host char is 8 bits, we can return a pointer
7747 to the buffer, otherwise we have to copy the data to a buffer
7748 allocated on the temporary obstack. */
7749 gdb_assert (HOST_CHAR_BIT
== 8);
7754 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7756 /* If the size of a host char is 8 bits, we can return a pointer
7757 to the string, otherwise we have to copy the string to a buffer
7758 allocated on the temporary obstack. */
7759 gdb_assert (HOST_CHAR_BIT
== 8);
7762 *bytes_read_ptr
= 1;
7765 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7766 return (char *) buf
;
7770 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7771 const struct comp_unit_head
*cu_header
,
7772 unsigned int *bytes_read_ptr
)
7774 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7776 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
7777 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7779 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7780 bfd_get_filename (abfd
));
7783 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7785 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7786 bfd_get_filename (abfd
));
7789 gdb_assert (HOST_CHAR_BIT
== 8);
7790 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7792 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7795 static unsigned long
7796 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7798 unsigned long result
;
7799 unsigned int num_read
;
7809 byte
= bfd_get_8 (abfd
, buf
);
7812 result
|= ((unsigned long)(byte
& 127) << shift
);
7813 if ((byte
& 128) == 0)
7819 *bytes_read_ptr
= num_read
;
7824 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7827 int i
, shift
, num_read
;
7836 byte
= bfd_get_8 (abfd
, buf
);
7839 result
|= ((long)(byte
& 127) << shift
);
7841 if ((byte
& 128) == 0)
7846 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7847 result
|= -(((long)1) << shift
);
7848 *bytes_read_ptr
= num_read
;
7852 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7855 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7861 byte
= bfd_get_8 (abfd
, buf
);
7863 if ((byte
& 128) == 0)
7869 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7876 cu
->language
= language_c
;
7878 case DW_LANG_C_plus_plus
:
7879 cu
->language
= language_cplus
;
7882 cu
->language
= language_d
;
7884 case DW_LANG_Fortran77
:
7885 case DW_LANG_Fortran90
:
7886 case DW_LANG_Fortran95
:
7887 cu
->language
= language_fortran
;
7889 case DW_LANG_Mips_Assembler
:
7890 cu
->language
= language_asm
;
7893 cu
->language
= language_java
;
7897 cu
->language
= language_ada
;
7899 case DW_LANG_Modula2
:
7900 cu
->language
= language_m2
;
7902 case DW_LANG_Pascal83
:
7903 cu
->language
= language_pascal
;
7906 cu
->language
= language_objc
;
7908 case DW_LANG_Cobol74
:
7909 case DW_LANG_Cobol85
:
7911 cu
->language
= language_minimal
;
7914 cu
->language_defn
= language_def (cu
->language
);
7917 /* Return the named attribute or NULL if not there. */
7919 static struct attribute
*
7920 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7923 struct attribute
*spec
= NULL
;
7925 for (i
= 0; i
< die
->num_attrs
; ++i
)
7927 if (die
->attrs
[i
].name
== name
)
7928 return &die
->attrs
[i
];
7929 if (die
->attrs
[i
].name
== DW_AT_specification
7930 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7931 spec
= &die
->attrs
[i
];
7936 die
= follow_die_ref (die
, spec
, &cu
);
7937 return dwarf2_attr (die
, name
, cu
);
7943 /* Return the named attribute or NULL if not there,
7944 but do not follow DW_AT_specification, etc.
7945 This is for use in contexts where we're reading .debug_types dies.
7946 Following DW_AT_specification, DW_AT_abstract_origin will take us
7947 back up the chain, and we want to go down. */
7949 static struct attribute
*
7950 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7951 struct dwarf2_cu
*cu
)
7955 for (i
= 0; i
< die
->num_attrs
; ++i
)
7956 if (die
->attrs
[i
].name
== name
)
7957 return &die
->attrs
[i
];
7962 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7963 and holds a non-zero value. This function should only be used for
7964 DW_FORM_flag or DW_FORM_flag_present attributes. */
7967 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7969 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7971 return (attr
&& DW_UNSND (attr
));
7975 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7977 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7978 which value is non-zero. However, we have to be careful with
7979 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7980 (via dwarf2_flag_true_p) follows this attribute. So we may
7981 end up accidently finding a declaration attribute that belongs
7982 to a different DIE referenced by the specification attribute,
7983 even though the given DIE does not have a declaration attribute. */
7984 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7985 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7988 /* Return the die giving the specification for DIE, if there is
7989 one. *SPEC_CU is the CU containing DIE on input, and the CU
7990 containing the return value on output. If there is no
7991 specification, but there is an abstract origin, that is
7994 static struct die_info
*
7995 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7997 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
8000 if (spec_attr
== NULL
)
8001 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
8003 if (spec_attr
== NULL
)
8006 return follow_die_ref (die
, spec_attr
, spec_cu
);
8009 /* Free the line_header structure *LH, and any arrays and strings it
8012 free_line_header (struct line_header
*lh
)
8014 if (lh
->standard_opcode_lengths
)
8015 xfree (lh
->standard_opcode_lengths
);
8017 /* Remember that all the lh->file_names[i].name pointers are
8018 pointers into debug_line_buffer, and don't need to be freed. */
8020 xfree (lh
->file_names
);
8022 /* Similarly for the include directory names. */
8023 if (lh
->include_dirs
)
8024 xfree (lh
->include_dirs
);
8030 /* Add an entry to LH's include directory table. */
8032 add_include_dir (struct line_header
*lh
, char *include_dir
)
8034 /* Grow the array if necessary. */
8035 if (lh
->include_dirs_size
== 0)
8037 lh
->include_dirs_size
= 1; /* for testing */
8038 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
8039 * sizeof (*lh
->include_dirs
));
8041 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
8043 lh
->include_dirs_size
*= 2;
8044 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
8045 (lh
->include_dirs_size
8046 * sizeof (*lh
->include_dirs
)));
8049 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
8053 /* Add an entry to LH's file name table. */
8055 add_file_name (struct line_header
*lh
,
8057 unsigned int dir_index
,
8058 unsigned int mod_time
,
8059 unsigned int length
)
8061 struct file_entry
*fe
;
8063 /* Grow the array if necessary. */
8064 if (lh
->file_names_size
== 0)
8066 lh
->file_names_size
= 1; /* for testing */
8067 lh
->file_names
= xmalloc (lh
->file_names_size
8068 * sizeof (*lh
->file_names
));
8070 else if (lh
->num_file_names
>= lh
->file_names_size
)
8072 lh
->file_names_size
*= 2;
8073 lh
->file_names
= xrealloc (lh
->file_names
,
8074 (lh
->file_names_size
8075 * sizeof (*lh
->file_names
)));
8078 fe
= &lh
->file_names
[lh
->num_file_names
++];
8080 fe
->dir_index
= dir_index
;
8081 fe
->mod_time
= mod_time
;
8082 fe
->length
= length
;
8088 /* Read the statement program header starting at OFFSET in
8089 .debug_line, according to the endianness of ABFD. Return a pointer
8090 to a struct line_header, allocated using xmalloc.
8092 NOTE: the strings in the include directory and file name tables of
8093 the returned object point into debug_line_buffer, and must not be
8095 static struct line_header
*
8096 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
8097 struct dwarf2_cu
*cu
)
8099 struct cleanup
*back_to
;
8100 struct line_header
*lh
;
8102 unsigned int bytes_read
, offset_size
;
8104 char *cur_dir
, *cur_file
;
8106 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
8107 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
8109 complaint (&symfile_complaints
, _("missing .debug_line section"));
8113 /* Make sure that at least there's room for the total_length field.
8114 That could be 12 bytes long, but we're just going to fudge that. */
8115 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
8117 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8121 lh
= xmalloc (sizeof (*lh
));
8122 memset (lh
, 0, sizeof (*lh
));
8123 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
8126 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
8128 /* Read in the header. */
8130 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
8131 &bytes_read
, &offset_size
);
8132 line_ptr
+= bytes_read
;
8133 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
8134 + dwarf2_per_objfile
->line
.size
))
8136 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8139 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
8140 lh
->version
= read_2_bytes (abfd
, line_ptr
);
8142 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
8143 line_ptr
+= offset_size
;
8144 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
8146 if (lh
->version
>= 4)
8148 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
8152 lh
->maximum_ops_per_instruction
= 1;
8154 if (lh
->maximum_ops_per_instruction
== 0)
8156 lh
->maximum_ops_per_instruction
= 1;
8157 complaint (&symfile_complaints
,
8158 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
8161 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
8163 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
8165 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
8167 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
8169 lh
->standard_opcode_lengths
8170 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
8172 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
8173 for (i
= 1; i
< lh
->opcode_base
; ++i
)
8175 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
8179 /* Read directory table. */
8180 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
8182 line_ptr
+= bytes_read
;
8183 add_include_dir (lh
, cur_dir
);
8185 line_ptr
+= bytes_read
;
8187 /* Read file name table. */
8188 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
8190 unsigned int dir_index
, mod_time
, length
;
8192 line_ptr
+= bytes_read
;
8193 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8194 line_ptr
+= bytes_read
;
8195 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8196 line_ptr
+= bytes_read
;
8197 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8198 line_ptr
+= bytes_read
;
8200 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8202 line_ptr
+= bytes_read
;
8203 lh
->statement_program_start
= line_ptr
;
8205 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
8206 + dwarf2_per_objfile
->line
.size
))
8207 complaint (&symfile_complaints
,
8208 _("line number info header doesn't fit in `.debug_line' section"));
8210 discard_cleanups (back_to
);
8214 /* This function exists to work around a bug in certain compilers
8215 (particularly GCC 2.95), in which the first line number marker of a
8216 function does not show up until after the prologue, right before
8217 the second line number marker. This function shifts ADDRESS down
8218 to the beginning of the function if necessary, and is called on
8219 addresses passed to record_line. */
8222 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
8224 struct function_range
*fn
;
8226 /* Find the function_range containing address. */
8231 cu
->cached_fn
= cu
->first_fn
;
8235 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
8241 while (fn
&& fn
!= cu
->cached_fn
)
8242 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
8252 if (address
!= fn
->lowpc
)
8253 complaint (&symfile_complaints
,
8254 _("misplaced first line number at 0x%lx for '%s'"),
8255 (unsigned long) address
, fn
->name
);
8260 /* Decode the Line Number Program (LNP) for the given line_header
8261 structure and CU. The actual information extracted and the type
8262 of structures created from the LNP depends on the value of PST.
8264 1. If PST is NULL, then this procedure uses the data from the program
8265 to create all necessary symbol tables, and their linetables.
8266 The compilation directory of the file is passed in COMP_DIR,
8267 and must not be NULL.
8269 2. If PST is not NULL, this procedure reads the program to determine
8270 the list of files included by the unit represented by PST, and
8271 builds all the associated partial symbol tables. In this case,
8272 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
8273 is not used to compute the full name of the symtab, and therefore
8274 omitting it when building the partial symtab does not introduce
8275 the potential for inconsistency - a partial symtab and its associated
8276 symbtab having a different fullname -). */
8279 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
8280 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
8282 gdb_byte
*line_ptr
, *extended_end
;
8284 unsigned int bytes_read
, extended_len
;
8285 unsigned char op_code
, extended_op
, adj_opcode
;
8287 struct objfile
*objfile
= cu
->objfile
;
8288 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8289 const int decode_for_pst_p
= (pst
!= NULL
);
8290 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
8292 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8294 line_ptr
= lh
->statement_program_start
;
8295 line_end
= lh
->statement_program_end
;
8297 /* Read the statement sequences until there's nothing left. */
8298 while (line_ptr
< line_end
)
8300 /* state machine registers */
8301 CORE_ADDR address
= 0;
8302 unsigned int file
= 1;
8303 unsigned int line
= 1;
8304 unsigned int column
= 0;
8305 int is_stmt
= lh
->default_is_stmt
;
8306 int basic_block
= 0;
8307 int end_sequence
= 0;
8309 unsigned char op_index
= 0;
8311 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
8313 /* Start a subfile for the current file of the state machine. */
8314 /* lh->include_dirs and lh->file_names are 0-based, but the
8315 directory and file name numbers in the statement program
8317 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
8321 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8323 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8326 /* Decode the table. */
8327 while (!end_sequence
)
8329 op_code
= read_1_byte (abfd
, line_ptr
);
8331 if (line_ptr
> line_end
)
8333 dwarf2_debug_line_missing_end_sequence_complaint ();
8337 if (op_code
>= lh
->opcode_base
)
8339 /* Special operand. */
8340 adj_opcode
= op_code
- lh
->opcode_base
;
8341 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
8342 / lh
->maximum_ops_per_instruction
)
8343 * lh
->minimum_instruction_length
);
8344 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
8345 % lh
->maximum_ops_per_instruction
);
8346 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
8347 if (lh
->num_file_names
< file
|| file
== 0)
8348 dwarf2_debug_line_missing_file_complaint ();
8349 /* For now we ignore lines not starting on an
8350 instruction boundary. */
8351 else if (op_index
== 0)
8353 lh
->file_names
[file
- 1].included_p
= 1;
8354 if (!decode_for_pst_p
&& is_stmt
)
8356 if (last_subfile
!= current_subfile
)
8358 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8360 record_line (last_subfile
, 0, addr
);
8361 last_subfile
= current_subfile
;
8363 /* Append row to matrix using current values. */
8364 addr
= check_cu_functions (address
, cu
);
8365 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8366 record_line (current_subfile
, line
, addr
);
8371 else switch (op_code
)
8373 case DW_LNS_extended_op
:
8374 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8375 line_ptr
+= bytes_read
;
8376 extended_end
= line_ptr
+ extended_len
;
8377 extended_op
= read_1_byte (abfd
, line_ptr
);
8379 switch (extended_op
)
8381 case DW_LNE_end_sequence
:
8384 case DW_LNE_set_address
:
8385 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
8387 line_ptr
+= bytes_read
;
8388 address
+= baseaddr
;
8390 case DW_LNE_define_file
:
8393 unsigned int dir_index
, mod_time
, length
;
8395 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8396 line_ptr
+= bytes_read
;
8398 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8399 line_ptr
+= bytes_read
;
8401 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8402 line_ptr
+= bytes_read
;
8404 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8405 line_ptr
+= bytes_read
;
8406 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8409 case DW_LNE_set_discriminator
:
8410 /* The discriminator is not interesting to the debugger;
8412 line_ptr
= extended_end
;
8415 complaint (&symfile_complaints
,
8416 _("mangled .debug_line section"));
8419 /* Make sure that we parsed the extended op correctly. If e.g.
8420 we expected a different address size than the producer used,
8421 we may have read the wrong number of bytes. */
8422 if (line_ptr
!= extended_end
)
8424 complaint (&symfile_complaints
,
8425 _("mangled .debug_line section"));
8430 if (lh
->num_file_names
< file
|| file
== 0)
8431 dwarf2_debug_line_missing_file_complaint ();
8434 lh
->file_names
[file
- 1].included_p
= 1;
8435 if (!decode_for_pst_p
&& is_stmt
)
8437 if (last_subfile
!= current_subfile
)
8439 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8441 record_line (last_subfile
, 0, addr
);
8442 last_subfile
= current_subfile
;
8444 addr
= check_cu_functions (address
, cu
);
8445 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8446 record_line (current_subfile
, line
, addr
);
8451 case DW_LNS_advance_pc
:
8454 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8456 address
+= (((op_index
+ adjust
)
8457 / lh
->maximum_ops_per_instruction
)
8458 * lh
->minimum_instruction_length
);
8459 op_index
= ((op_index
+ adjust
)
8460 % lh
->maximum_ops_per_instruction
);
8461 line_ptr
+= bytes_read
;
8464 case DW_LNS_advance_line
:
8465 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8466 line_ptr
+= bytes_read
;
8468 case DW_LNS_set_file
:
8470 /* The arrays lh->include_dirs and lh->file_names are
8471 0-based, but the directory and file name numbers in
8472 the statement program are 1-based. */
8473 struct file_entry
*fe
;
8476 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8477 line_ptr
+= bytes_read
;
8478 if (lh
->num_file_names
< file
|| file
== 0)
8479 dwarf2_debug_line_missing_file_complaint ();
8482 fe
= &lh
->file_names
[file
- 1];
8484 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8485 if (!decode_for_pst_p
)
8487 last_subfile
= current_subfile
;
8488 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8493 case DW_LNS_set_column
:
8494 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8495 line_ptr
+= bytes_read
;
8497 case DW_LNS_negate_stmt
:
8498 is_stmt
= (!is_stmt
);
8500 case DW_LNS_set_basic_block
:
8503 /* Add to the address register of the state machine the
8504 address increment value corresponding to special opcode
8505 255. I.e., this value is scaled by the minimum
8506 instruction length since special opcode 255 would have
8507 scaled the the increment. */
8508 case DW_LNS_const_add_pc
:
8510 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
8512 address
+= (((op_index
+ adjust
)
8513 / lh
->maximum_ops_per_instruction
)
8514 * lh
->minimum_instruction_length
);
8515 op_index
= ((op_index
+ adjust
)
8516 % lh
->maximum_ops_per_instruction
);
8519 case DW_LNS_fixed_advance_pc
:
8520 address
+= read_2_bytes (abfd
, line_ptr
);
8526 /* Unknown standard opcode, ignore it. */
8529 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8531 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8532 line_ptr
+= bytes_read
;
8537 if (lh
->num_file_names
< file
|| file
== 0)
8538 dwarf2_debug_line_missing_file_complaint ();
8541 lh
->file_names
[file
- 1].included_p
= 1;
8542 if (!decode_for_pst_p
)
8544 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8545 record_line (current_subfile
, 0, addr
);
8550 if (decode_for_pst_p
)
8554 /* Now that we're done scanning the Line Header Program, we can
8555 create the psymtab of each included file. */
8556 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8557 if (lh
->file_names
[file_index
].included_p
== 1)
8559 const struct file_entry fe
= lh
->file_names
[file_index
];
8560 char *include_name
= fe
.name
;
8561 char *dir_name
= NULL
;
8562 char *pst_filename
= pst
->filename
;
8565 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8567 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8569 include_name
= concat (dir_name
, SLASH_STRING
,
8570 include_name
, (char *)NULL
);
8571 make_cleanup (xfree
, include_name
);
8574 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8576 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8577 pst_filename
, (char *)NULL
);
8578 make_cleanup (xfree
, pst_filename
);
8581 if (strcmp (include_name
, pst_filename
) != 0)
8582 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8587 /* Make sure a symtab is created for every file, even files
8588 which contain only variables (i.e. no code with associated
8592 struct file_entry
*fe
;
8594 for (i
= 0; i
< lh
->num_file_names
; i
++)
8598 fe
= &lh
->file_names
[i
];
8600 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8601 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8603 /* Skip the main file; we don't need it, and it must be
8604 allocated last, so that it will show up before the
8605 non-primary symtabs in the objfile's symtab list. */
8606 if (current_subfile
== first_subfile
)
8609 if (current_subfile
->symtab
== NULL
)
8610 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8612 fe
->symtab
= current_subfile
->symtab
;
8617 /* Start a subfile for DWARF. FILENAME is the name of the file and
8618 DIRNAME the name of the source directory which contains FILENAME
8619 or NULL if not known. COMP_DIR is the compilation directory for the
8620 linetable's compilation unit or NULL if not known.
8621 This routine tries to keep line numbers from identical absolute and
8622 relative file names in a common subfile.
8624 Using the `list' example from the GDB testsuite, which resides in
8625 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8626 of /srcdir/list0.c yields the following debugging information for list0.c:
8628 DW_AT_name: /srcdir/list0.c
8629 DW_AT_comp_dir: /compdir
8630 files.files[0].name: list0.h
8631 files.files[0].dir: /srcdir
8632 files.files[1].name: list0.c
8633 files.files[1].dir: /srcdir
8635 The line number information for list0.c has to end up in a single
8636 subfile, so that `break /srcdir/list0.c:1' works as expected.
8637 start_subfile will ensure that this happens provided that we pass the
8638 concatenation of files.files[1].dir and files.files[1].name as the
8642 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8646 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8647 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8648 second argument to start_subfile. To be consistent, we do the
8649 same here. In order not to lose the line information directory,
8650 we concatenate it to the filename when it makes sense.
8651 Note that the Dwarf3 standard says (speaking of filenames in line
8652 information): ``The directory index is ignored for file names
8653 that represent full path names''. Thus ignoring dirname in the
8654 `else' branch below isn't an issue. */
8656 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8657 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8659 fullname
= filename
;
8661 start_subfile (fullname
, comp_dir
);
8663 if (fullname
!= filename
)
8668 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8669 struct dwarf2_cu
*cu
)
8671 struct objfile
*objfile
= cu
->objfile
;
8672 struct comp_unit_head
*cu_header
= &cu
->header
;
8674 /* NOTE drow/2003-01-30: There used to be a comment and some special
8675 code here to turn a symbol with DW_AT_external and a
8676 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8677 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8678 with some versions of binutils) where shared libraries could have
8679 relocations against symbols in their debug information - the
8680 minimal symbol would have the right address, but the debug info
8681 would not. It's no longer necessary, because we will explicitly
8682 apply relocations when we read in the debug information now. */
8684 /* A DW_AT_location attribute with no contents indicates that a
8685 variable has been optimized away. */
8686 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8688 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8692 /* Handle one degenerate form of location expression specially, to
8693 preserve GDB's previous behavior when section offsets are
8694 specified. If this is just a DW_OP_addr then mark this symbol
8697 if (attr_form_is_block (attr
)
8698 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8699 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8703 SYMBOL_VALUE_ADDRESS (sym
) =
8704 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8705 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8706 fixup_symbol_section (sym
, objfile
);
8707 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8708 SYMBOL_SECTION (sym
));
8712 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8713 expression evaluator, and use LOC_COMPUTED only when necessary
8714 (i.e. when the value of a register or memory location is
8715 referenced, or a thread-local block, etc.). Then again, it might
8716 not be worthwhile. I'm assuming that it isn't unless performance
8717 or memory numbers show me otherwise. */
8719 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8720 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8723 /* Given a pointer to a DWARF information entry, figure out if we need
8724 to make a symbol table entry for it, and if so, create a new entry
8725 and return a pointer to it.
8726 If TYPE is NULL, determine symbol type from the die, otherwise
8727 used the passed type. */
8729 static struct symbol
*
8730 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8732 struct objfile
*objfile
= cu
->objfile
;
8733 struct symbol
*sym
= NULL
;
8735 struct attribute
*attr
= NULL
;
8736 struct attribute
*attr2
= NULL
;
8738 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8740 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8742 name
= dwarf2_name (die
, cu
);
8745 const char *linkagename
;
8747 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8748 sizeof (struct symbol
));
8749 OBJSTAT (objfile
, n_syms
++);
8750 memset (sym
, 0, sizeof (struct symbol
));
8752 /* Cache this symbol's name and the name's demangled form (if any). */
8753 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8754 linkagename
= dwarf2_physname (name
, die
, cu
);
8755 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
8757 /* Fortran does not have mangling standard and the mangling does differ
8758 between gfortran, iFort etc. */
8759 if (cu
->language
== language_fortran
8760 && sym
->ginfo
.language_specific
.cplus_specific
.demangled_name
== NULL
)
8761 sym
->ginfo
.language_specific
.cplus_specific
.demangled_name
8762 = (char *) dwarf2_full_name (name
, die
, cu
);
8764 /* Default assumptions.
8765 Use the passed type or decode it from the die. */
8766 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8767 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8769 SYMBOL_TYPE (sym
) = type
;
8771 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8772 attr
= dwarf2_attr (die
,
8773 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8777 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8780 attr
= dwarf2_attr (die
,
8781 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8785 int file_index
= DW_UNSND (attr
);
8787 if (cu
->line_header
== NULL
8788 || file_index
> cu
->line_header
->num_file_names
)
8789 complaint (&symfile_complaints
,
8790 _("file index out of range"));
8791 else if (file_index
> 0)
8793 struct file_entry
*fe
;
8795 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8796 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8803 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8806 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8808 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8810 case DW_TAG_subprogram
:
8811 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8813 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8814 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8815 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8816 || cu
->language
== language_ada
)
8818 /* Subprograms marked external are stored as a global symbol.
8819 Ada subprograms, whether marked external or not, are always
8820 stored as a global symbol, because we want to be able to
8821 access them globally. For instance, we want to be able
8822 to break on a nested subprogram without having to
8823 specify the context. */
8824 add_symbol_to_list (sym
, &global_symbols
);
8828 add_symbol_to_list (sym
, cu
->list_in_scope
);
8831 case DW_TAG_inlined_subroutine
:
8832 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8834 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8835 SYMBOL_INLINED (sym
) = 1;
8836 /* Do not add the symbol to any lists. It will be found via
8837 BLOCK_FUNCTION from the blockvector. */
8839 case DW_TAG_variable
:
8841 /* Compilation with minimal debug info may result in variables
8842 with missing type entries. Change the misleading `void' type
8843 to something sensible. */
8844 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8846 = objfile_type (objfile
)->nodebug_data_symbol
;
8848 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8849 /* In the case of DW_TAG_member, we should only be called for
8850 static const members. */
8851 if (die
->tag
== DW_TAG_member
)
8853 /* NOTE: This test seems wrong according to the dwarf standard.
8854 static data members are represented by DW_AT_external.
8855 However, dwarf2_add_field is currently calling
8856 die_is_declaration to check, so we do the same. */
8857 gdb_assert (die_is_declaration (die
, cu
));
8862 dwarf2_const_value (attr
, sym
, cu
);
8863 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8864 if (attr2
&& (DW_UNSND (attr2
) != 0))
8865 add_symbol_to_list (sym
, &global_symbols
);
8867 add_symbol_to_list (sym
, cu
->list_in_scope
);
8870 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8873 var_decode_location (attr
, sym
, cu
);
8874 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8875 if (attr2
&& (DW_UNSND (attr2
) != 0))
8877 struct pending
**list_to_add
;
8879 /* Workaround gfortran PR debug/40040 - it uses
8880 DW_AT_location for variables in -fPIC libraries which may
8881 get overriden by other libraries/executable and get
8882 a different address. Resolve it by the minimal symbol
8883 which may come from inferior's executable using copy
8884 relocation. Make this workaround only for gfortran as for
8885 other compilers GDB cannot guess the minimal symbol
8886 Fortran mangling kind. */
8887 if (cu
->language
== language_fortran
&& die
->parent
8888 && die
->parent
->tag
== DW_TAG_module
8890 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
8891 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8893 /* A variable with DW_AT_external is never static,
8894 but it may be block-scoped. */
8895 list_to_add
= (cu
->list_in_scope
== &file_symbols
8896 ? &global_symbols
: cu
->list_in_scope
);
8897 add_symbol_to_list (sym
, list_to_add
);
8900 add_symbol_to_list (sym
, cu
->list_in_scope
);
8904 /* We do not know the address of this symbol.
8905 If it is an external symbol and we have type information
8906 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8907 The address of the variable will then be determined from
8908 the minimal symbol table whenever the variable is
8910 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8911 if (attr2
&& (DW_UNSND (attr2
) != 0)
8912 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8914 struct pending
**list_to_add
;
8916 /* A variable with DW_AT_external is never static, but it
8917 may be block-scoped. */
8918 list_to_add
= (cu
->list_in_scope
== &file_symbols
8919 ? &global_symbols
: cu
->list_in_scope
);
8921 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8922 add_symbol_to_list (sym
, list_to_add
);
8924 else if (!die_is_declaration (die
, cu
))
8926 /* Use the default LOC_OPTIMIZED_OUT class. */
8927 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8928 add_symbol_to_list (sym
, cu
->list_in_scope
);
8932 case DW_TAG_formal_parameter
:
8933 /* If we are inside a function, mark this as an argument. If
8934 not, we might be looking at an argument to an inlined function
8935 when we do not have enough information to show inlined frames;
8936 pretend it's a local variable in that case so that the user can
8938 if (context_stack_depth
> 0
8939 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8940 SYMBOL_IS_ARGUMENT (sym
) = 1;
8941 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8944 var_decode_location (attr
, sym
, cu
);
8946 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8949 dwarf2_const_value (attr
, sym
, cu
);
8951 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
8952 if (attr
&& DW_UNSND (attr
))
8954 struct type
*ref_type
;
8956 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
8957 SYMBOL_TYPE (sym
) = ref_type
;
8960 add_symbol_to_list (sym
, cu
->list_in_scope
);
8962 case DW_TAG_unspecified_parameters
:
8963 /* From varargs functions; gdb doesn't seem to have any
8964 interest in this information, so just ignore it for now.
8967 case DW_TAG_class_type
:
8968 case DW_TAG_interface_type
:
8969 case DW_TAG_structure_type
:
8970 case DW_TAG_union_type
:
8971 case DW_TAG_set_type
:
8972 case DW_TAG_enumeration_type
:
8973 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8974 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8977 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8978 really ever be static objects: otherwise, if you try
8979 to, say, break of a class's method and you're in a file
8980 which doesn't mention that class, it won't work unless
8981 the check for all static symbols in lookup_symbol_aux
8982 saves you. See the OtherFileClass tests in
8983 gdb.c++/namespace.exp. */
8985 struct pending
**list_to_add
;
8987 list_to_add
= (cu
->list_in_scope
== &file_symbols
8988 && (cu
->language
== language_cplus
8989 || cu
->language
== language_java
)
8990 ? &global_symbols
: cu
->list_in_scope
);
8992 add_symbol_to_list (sym
, list_to_add
);
8994 /* The semantics of C++ state that "struct foo { ... }" also
8995 defines a typedef for "foo". A Java class declaration also
8996 defines a typedef for the class. */
8997 if (cu
->language
== language_cplus
8998 || cu
->language
== language_java
8999 || cu
->language
== language_ada
)
9001 /* The symbol's name is already allocated along with
9002 this objfile, so we don't need to duplicate it for
9004 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
9005 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
9009 case DW_TAG_typedef
:
9010 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
9011 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
9012 add_symbol_to_list (sym
, cu
->list_in_scope
);
9014 case DW_TAG_base_type
:
9015 case DW_TAG_subrange_type
:
9016 case DW_TAG_const_type
:
9017 case DW_TAG_volatile_type
:
9018 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
9019 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
9020 add_symbol_to_list (sym
, cu
->list_in_scope
);
9022 case DW_TAG_enumerator
:
9023 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
9026 dwarf2_const_value (attr
, sym
, cu
);
9029 /* NOTE: carlton/2003-11-10: See comment above in the
9030 DW_TAG_class_type, etc. block. */
9032 struct pending
**list_to_add
;
9034 list_to_add
= (cu
->list_in_scope
== &file_symbols
9035 && (cu
->language
== language_cplus
9036 || cu
->language
== language_java
)
9037 ? &global_symbols
: cu
->list_in_scope
);
9039 add_symbol_to_list (sym
, list_to_add
);
9042 case DW_TAG_namespace
:
9043 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
9044 add_symbol_to_list (sym
, &global_symbols
);
9047 /* Not a tag we recognize. Hopefully we aren't processing
9048 trash data, but since we must specifically ignore things
9049 we don't recognize, there is nothing else we should do at
9051 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
9052 dwarf_tag_name (die
->tag
));
9056 /* For the benefit of old versions of GCC, check for anonymous
9057 namespaces based on the demangled name. */
9058 if (!processing_has_namespace_info
9059 && cu
->language
== language_cplus
)
9060 cp_scan_for_anonymous_namespaces (sym
);
9065 /* Copy constant value from an attribute to a symbol. */
9068 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
9069 struct dwarf2_cu
*cu
)
9071 struct objfile
*objfile
= cu
->objfile
;
9072 struct comp_unit_head
*cu_header
= &cu
->header
;
9073 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
9074 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
9075 struct dwarf_block
*blk
;
9080 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
9081 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
9082 cu_header
->addr_size
,
9083 TYPE_LENGTH (SYMBOL_TYPE
9085 SYMBOL_VALUE_BYTES (sym
) =
9086 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
9087 /* NOTE: cagney/2003-05-09: In-lined store_address call with
9088 it's body - store_unsigned_integer. */
9089 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
9090 byte_order
, DW_ADDR (attr
));
9091 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
9093 case DW_FORM_string
:
9095 /* DW_STRING is already allocated on the obstack, point directly
9097 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
9098 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
9100 case DW_FORM_block1
:
9101 case DW_FORM_block2
:
9102 case DW_FORM_block4
:
9104 case DW_FORM_exprloc
:
9105 blk
= DW_BLOCK (attr
);
9106 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
9107 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
9109 TYPE_LENGTH (SYMBOL_TYPE
9111 SYMBOL_VALUE_BYTES (sym
) =
9112 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
9113 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
9114 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
9117 /* The DW_AT_const_value attributes are supposed to carry the
9118 symbol's value "represented as it would be on the target
9119 architecture." By the time we get here, it's already been
9120 converted to host endianness, so we just need to sign- or
9121 zero-extend it as appropriate. */
9123 dwarf2_const_value_data (attr
, sym
, 8);
9126 dwarf2_const_value_data (attr
, sym
, 16);
9129 dwarf2_const_value_data (attr
, sym
, 32);
9132 dwarf2_const_value_data (attr
, sym
, 64);
9136 SYMBOL_VALUE (sym
) = DW_SND (attr
);
9137 SYMBOL_CLASS (sym
) = LOC_CONST
;
9141 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
9142 SYMBOL_CLASS (sym
) = LOC_CONST
;
9146 complaint (&symfile_complaints
,
9147 _("unsupported const value attribute form: '%s'"),
9148 dwarf_form_name (attr
->form
));
9149 SYMBOL_VALUE (sym
) = 0;
9150 SYMBOL_CLASS (sym
) = LOC_CONST
;
9156 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
9157 or zero-extend it as appropriate for the symbol's type. */
9159 dwarf2_const_value_data (struct attribute
*attr
,
9163 LONGEST l
= DW_UNSND (attr
);
9165 if (bits
< sizeof (l
) * 8)
9167 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
9168 l
&= ((LONGEST
) 1 << bits
) - 1;
9170 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
9173 SYMBOL_VALUE (sym
) = l
;
9174 SYMBOL_CLASS (sym
) = LOC_CONST
;
9178 /* Return the type of the die in question using its DW_AT_type attribute. */
9180 static struct type
*
9181 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9183 struct attribute
*type_attr
;
9184 struct die_info
*type_die
;
9186 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
9189 /* A missing DW_AT_type represents a void type. */
9190 return objfile_type (cu
->objfile
)->builtin_void
;
9193 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
9195 return tag_type_to_type (type_die
, cu
);
9198 /* True iff CU's producer generates GNAT Ada auxiliary information
9199 that allows to find parallel types through that information instead
9200 of having to do expensive parallel lookups by type name. */
9203 need_gnat_info (struct dwarf2_cu
*cu
)
9205 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
9206 of GNAT produces this auxiliary information, without any indication
9207 that it is produced. Part of enhancing the FSF version of GNAT
9208 to produce that information will be to put in place an indicator
9209 that we can use in order to determine whether the descriptive type
9210 info is available or not. One suggestion that has been made is
9211 to use a new attribute, attached to the CU die. For now, assume
9212 that the descriptive type info is not available. */
9217 /* Return the auxiliary type of the die in question using its
9218 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
9219 attribute is not present. */
9221 static struct type
*
9222 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9224 struct attribute
*type_attr
;
9225 struct die_info
*type_die
;
9227 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
9231 type_die
= follow_die_ref (die
, type_attr
, &cu
);
9232 return tag_type_to_type (type_die
, cu
);
9235 /* If DIE has a descriptive_type attribute, then set the TYPE's
9236 descriptive type accordingly. */
9239 set_descriptive_type (struct type
*type
, struct die_info
*die
,
9240 struct dwarf2_cu
*cu
)
9242 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
9244 if (descriptive_type
)
9246 ALLOCATE_GNAT_AUX_TYPE (type
);
9247 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
9251 /* Return the containing type of the die in question using its
9252 DW_AT_containing_type attribute. */
9254 static struct type
*
9255 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9257 struct attribute
*type_attr
;
9258 struct die_info
*type_die
;
9260 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
9262 error (_("Dwarf Error: Problem turning containing type into gdb type "
9263 "[in module %s]"), cu
->objfile
->name
);
9265 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
9266 return tag_type_to_type (type_die
, cu
);
9269 static struct type
*
9270 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9272 struct type
*this_type
;
9274 this_type
= read_type_die (die
, cu
);
9277 char *message
, *saved
;
9279 /* read_type_die already issued a complaint. */
9280 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
9284 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
9285 message
, strlen (message
));
9288 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
9293 static struct type
*
9294 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9296 struct type
*this_type
;
9298 this_type
= get_die_type (die
, cu
);
9304 case DW_TAG_class_type
:
9305 case DW_TAG_interface_type
:
9306 case DW_TAG_structure_type
:
9307 case DW_TAG_union_type
:
9308 this_type
= read_structure_type (die
, cu
);
9310 case DW_TAG_enumeration_type
:
9311 this_type
= read_enumeration_type (die
, cu
);
9313 case DW_TAG_subprogram
:
9314 case DW_TAG_subroutine_type
:
9315 case DW_TAG_inlined_subroutine
:
9316 this_type
= read_subroutine_type (die
, cu
);
9318 case DW_TAG_array_type
:
9319 this_type
= read_array_type (die
, cu
);
9321 case DW_TAG_set_type
:
9322 this_type
= read_set_type (die
, cu
);
9324 case DW_TAG_pointer_type
:
9325 this_type
= read_tag_pointer_type (die
, cu
);
9327 case DW_TAG_ptr_to_member_type
:
9328 this_type
= read_tag_ptr_to_member_type (die
, cu
);
9330 case DW_TAG_reference_type
:
9331 this_type
= read_tag_reference_type (die
, cu
);
9333 case DW_TAG_const_type
:
9334 this_type
= read_tag_const_type (die
, cu
);
9336 case DW_TAG_volatile_type
:
9337 this_type
= read_tag_volatile_type (die
, cu
);
9339 case DW_TAG_string_type
:
9340 this_type
= read_tag_string_type (die
, cu
);
9342 case DW_TAG_typedef
:
9343 this_type
= read_typedef (die
, cu
);
9345 case DW_TAG_subrange_type
:
9346 this_type
= read_subrange_type (die
, cu
);
9348 case DW_TAG_base_type
:
9349 this_type
= read_base_type (die
, cu
);
9351 case DW_TAG_unspecified_type
:
9352 this_type
= read_unspecified_type (die
, cu
);
9354 case DW_TAG_namespace
:
9355 this_type
= read_namespace_type (die
, cu
);
9358 this_type
= read_module_type (die
, cu
);
9361 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
9362 dwarf_tag_name (die
->tag
));
9369 /* Return the name of the namespace/class that DIE is defined within,
9370 or "" if we can't tell. The caller should not xfree the result.
9372 For example, if we're within the method foo() in the following
9382 then determine_prefix on foo's die will return "N::C". */
9385 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
9387 struct die_info
*parent
, *spec_die
;
9388 struct dwarf2_cu
*spec_cu
;
9389 struct type
*parent_type
;
9391 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
9392 && cu
->language
!= language_fortran
)
9395 /* We have to be careful in the presence of DW_AT_specification.
9396 For example, with GCC 3.4, given the code
9400 // Definition of N::foo.
9404 then we'll have a tree of DIEs like this:
9406 1: DW_TAG_compile_unit
9407 2: DW_TAG_namespace // N
9408 3: DW_TAG_subprogram // declaration of N::foo
9409 4: DW_TAG_subprogram // definition of N::foo
9410 DW_AT_specification // refers to die #3
9412 Thus, when processing die #4, we have to pretend that we're in
9413 the context of its DW_AT_specification, namely the contex of die
9416 spec_die
= die_specification (die
, &spec_cu
);
9417 if (spec_die
== NULL
)
9418 parent
= die
->parent
;
9421 parent
= spec_die
->parent
;
9428 switch (parent
->tag
)
9430 case DW_TAG_namespace
:
9431 parent_type
= read_type_die (parent
, cu
);
9432 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9433 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9434 Work around this problem here. */
9435 if (cu
->language
== language_cplus
9436 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
9438 /* We give a name to even anonymous namespaces. */
9439 return TYPE_TAG_NAME (parent_type
);
9440 case DW_TAG_class_type
:
9441 case DW_TAG_interface_type
:
9442 case DW_TAG_structure_type
:
9443 case DW_TAG_union_type
:
9445 parent_type
= read_type_die (parent
, cu
);
9446 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9447 return TYPE_TAG_NAME (parent_type
);
9449 /* An anonymous structure is only allowed non-static data
9450 members; no typedefs, no member functions, et cetera.
9451 So it does not need a prefix. */
9454 return determine_prefix (parent
, cu
);
9458 /* Return a newly-allocated string formed by concatenating PREFIX and
9459 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9460 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9461 perform an obconcat, otherwise allocate storage for the result. The CU argument
9462 is used to determine the language and hence, the appropriate separator. */
9464 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
9467 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9468 int physname
, struct dwarf2_cu
*cu
)
9470 const char *lead
= "";
9473 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9475 else if (cu
->language
== language_java
)
9477 else if (cu
->language
== language_fortran
&& physname
)
9479 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
9480 DW_AT_MIPS_linkage_name is preferred and used instead. */
9495 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9497 strcpy (retval
, lead
);
9498 strcat (retval
, prefix
);
9499 strcat (retval
, sep
);
9500 strcat (retval
, suffix
);
9505 /* We have an obstack. */
9506 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
9510 /* Return sibling of die, NULL if no sibling. */
9512 static struct die_info
*
9513 sibling_die (struct die_info
*die
)
9515 return die
->sibling
;
9518 /* Get name of a die, return NULL if not found. */
9521 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9522 struct obstack
*obstack
)
9524 if (name
&& cu
->language
== language_cplus
)
9526 char *canon_name
= cp_canonicalize_string (name
);
9528 if (canon_name
!= NULL
)
9530 if (strcmp (canon_name
, name
) != 0)
9531 name
= obsavestring (canon_name
, strlen (canon_name
),
9540 /* Get name of a die, return NULL if not found. */
9543 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9545 struct attribute
*attr
;
9547 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9548 if (!attr
|| !DW_STRING (attr
))
9553 case DW_TAG_compile_unit
:
9554 /* Compilation units have a DW_AT_name that is a filename, not
9555 a source language identifier. */
9556 case DW_TAG_enumeration_type
:
9557 case DW_TAG_enumerator
:
9558 /* These tags always have simple identifiers already; no need
9559 to canonicalize them. */
9560 return DW_STRING (attr
);
9562 case DW_TAG_subprogram
:
9563 /* Java constructors will all be named "<init>", so return
9564 the class name when we see this special case. */
9565 if (cu
->language
== language_java
9566 && DW_STRING (attr
) != NULL
9567 && strcmp (DW_STRING (attr
), "<init>") == 0)
9569 struct dwarf2_cu
*spec_cu
= cu
;
9570 struct die_info
*spec_die
;
9572 /* GCJ will output '<init>' for Java constructor names.
9573 For this special case, return the name of the parent class. */
9575 /* GCJ may output suprogram DIEs with AT_specification set.
9576 If so, use the name of the specified DIE. */
9577 spec_die
= die_specification (die
, &spec_cu
);
9578 if (spec_die
!= NULL
)
9579 return dwarf2_name (spec_die
, spec_cu
);
9584 if (die
->tag
== DW_TAG_class_type
)
9585 return dwarf2_name (die
, cu
);
9587 while (die
->tag
!= DW_TAG_compile_unit
);
9591 case DW_TAG_class_type
:
9592 case DW_TAG_interface_type
:
9593 case DW_TAG_structure_type
:
9594 case DW_TAG_union_type
:
9595 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9596 structures or unions. These were of the form "._%d" in GCC 4.1,
9597 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9598 and GCC 4.4. We work around this problem by ignoring these. */
9599 if (strncmp (DW_STRING (attr
), "._", 2) == 0
9600 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
9608 if (!DW_STRING_IS_CANONICAL (attr
))
9611 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9612 &cu
->objfile
->objfile_obstack
);
9613 DW_STRING_IS_CANONICAL (attr
) = 1;
9615 return DW_STRING (attr
);
9618 /* Return the die that this die in an extension of, or NULL if there
9619 is none. *EXT_CU is the CU containing DIE on input, and the CU
9620 containing the return value on output. */
9622 static struct die_info
*
9623 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9625 struct attribute
*attr
;
9627 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9631 return follow_die_ref (die
, attr
, ext_cu
);
9634 /* Convert a DIE tag into its string name. */
9637 dwarf_tag_name (unsigned tag
)
9641 case DW_TAG_padding
:
9642 return "DW_TAG_padding";
9643 case DW_TAG_array_type
:
9644 return "DW_TAG_array_type";
9645 case DW_TAG_class_type
:
9646 return "DW_TAG_class_type";
9647 case DW_TAG_entry_point
:
9648 return "DW_TAG_entry_point";
9649 case DW_TAG_enumeration_type
:
9650 return "DW_TAG_enumeration_type";
9651 case DW_TAG_formal_parameter
:
9652 return "DW_TAG_formal_parameter";
9653 case DW_TAG_imported_declaration
:
9654 return "DW_TAG_imported_declaration";
9656 return "DW_TAG_label";
9657 case DW_TAG_lexical_block
:
9658 return "DW_TAG_lexical_block";
9660 return "DW_TAG_member";
9661 case DW_TAG_pointer_type
:
9662 return "DW_TAG_pointer_type";
9663 case DW_TAG_reference_type
:
9664 return "DW_TAG_reference_type";
9665 case DW_TAG_compile_unit
:
9666 return "DW_TAG_compile_unit";
9667 case DW_TAG_string_type
:
9668 return "DW_TAG_string_type";
9669 case DW_TAG_structure_type
:
9670 return "DW_TAG_structure_type";
9671 case DW_TAG_subroutine_type
:
9672 return "DW_TAG_subroutine_type";
9673 case DW_TAG_typedef
:
9674 return "DW_TAG_typedef";
9675 case DW_TAG_union_type
:
9676 return "DW_TAG_union_type";
9677 case DW_TAG_unspecified_parameters
:
9678 return "DW_TAG_unspecified_parameters";
9679 case DW_TAG_variant
:
9680 return "DW_TAG_variant";
9681 case DW_TAG_common_block
:
9682 return "DW_TAG_common_block";
9683 case DW_TAG_common_inclusion
:
9684 return "DW_TAG_common_inclusion";
9685 case DW_TAG_inheritance
:
9686 return "DW_TAG_inheritance";
9687 case DW_TAG_inlined_subroutine
:
9688 return "DW_TAG_inlined_subroutine";
9690 return "DW_TAG_module";
9691 case DW_TAG_ptr_to_member_type
:
9692 return "DW_TAG_ptr_to_member_type";
9693 case DW_TAG_set_type
:
9694 return "DW_TAG_set_type";
9695 case DW_TAG_subrange_type
:
9696 return "DW_TAG_subrange_type";
9697 case DW_TAG_with_stmt
:
9698 return "DW_TAG_with_stmt";
9699 case DW_TAG_access_declaration
:
9700 return "DW_TAG_access_declaration";
9701 case DW_TAG_base_type
:
9702 return "DW_TAG_base_type";
9703 case DW_TAG_catch_block
:
9704 return "DW_TAG_catch_block";
9705 case DW_TAG_const_type
:
9706 return "DW_TAG_const_type";
9707 case DW_TAG_constant
:
9708 return "DW_TAG_constant";
9709 case DW_TAG_enumerator
:
9710 return "DW_TAG_enumerator";
9711 case DW_TAG_file_type
:
9712 return "DW_TAG_file_type";
9714 return "DW_TAG_friend";
9715 case DW_TAG_namelist
:
9716 return "DW_TAG_namelist";
9717 case DW_TAG_namelist_item
:
9718 return "DW_TAG_namelist_item";
9719 case DW_TAG_packed_type
:
9720 return "DW_TAG_packed_type";
9721 case DW_TAG_subprogram
:
9722 return "DW_TAG_subprogram";
9723 case DW_TAG_template_type_param
:
9724 return "DW_TAG_template_type_param";
9725 case DW_TAG_template_value_param
:
9726 return "DW_TAG_template_value_param";
9727 case DW_TAG_thrown_type
:
9728 return "DW_TAG_thrown_type";
9729 case DW_TAG_try_block
:
9730 return "DW_TAG_try_block";
9731 case DW_TAG_variant_part
:
9732 return "DW_TAG_variant_part";
9733 case DW_TAG_variable
:
9734 return "DW_TAG_variable";
9735 case DW_TAG_volatile_type
:
9736 return "DW_TAG_volatile_type";
9737 case DW_TAG_dwarf_procedure
:
9738 return "DW_TAG_dwarf_procedure";
9739 case DW_TAG_restrict_type
:
9740 return "DW_TAG_restrict_type";
9741 case DW_TAG_interface_type
:
9742 return "DW_TAG_interface_type";
9743 case DW_TAG_namespace
:
9744 return "DW_TAG_namespace";
9745 case DW_TAG_imported_module
:
9746 return "DW_TAG_imported_module";
9747 case DW_TAG_unspecified_type
:
9748 return "DW_TAG_unspecified_type";
9749 case DW_TAG_partial_unit
:
9750 return "DW_TAG_partial_unit";
9751 case DW_TAG_imported_unit
:
9752 return "DW_TAG_imported_unit";
9753 case DW_TAG_condition
:
9754 return "DW_TAG_condition";
9755 case DW_TAG_shared_type
:
9756 return "DW_TAG_shared_type";
9757 case DW_TAG_type_unit
:
9758 return "DW_TAG_type_unit";
9759 case DW_TAG_MIPS_loop
:
9760 return "DW_TAG_MIPS_loop";
9761 case DW_TAG_HP_array_descriptor
:
9762 return "DW_TAG_HP_array_descriptor";
9763 case DW_TAG_format_label
:
9764 return "DW_TAG_format_label";
9765 case DW_TAG_function_template
:
9766 return "DW_TAG_function_template";
9767 case DW_TAG_class_template
:
9768 return "DW_TAG_class_template";
9769 case DW_TAG_GNU_BINCL
:
9770 return "DW_TAG_GNU_BINCL";
9771 case DW_TAG_GNU_EINCL
:
9772 return "DW_TAG_GNU_EINCL";
9773 case DW_TAG_upc_shared_type
:
9774 return "DW_TAG_upc_shared_type";
9775 case DW_TAG_upc_strict_type
:
9776 return "DW_TAG_upc_strict_type";
9777 case DW_TAG_upc_relaxed_type
:
9778 return "DW_TAG_upc_relaxed_type";
9779 case DW_TAG_PGI_kanji_type
:
9780 return "DW_TAG_PGI_kanji_type";
9781 case DW_TAG_PGI_interface_block
:
9782 return "DW_TAG_PGI_interface_block";
9784 return "DW_TAG_<unknown>";
9788 /* Convert a DWARF attribute code into its string name. */
9791 dwarf_attr_name (unsigned attr
)
9796 return "DW_AT_sibling";
9797 case DW_AT_location
:
9798 return "DW_AT_location";
9800 return "DW_AT_name";
9801 case DW_AT_ordering
:
9802 return "DW_AT_ordering";
9803 case DW_AT_subscr_data
:
9804 return "DW_AT_subscr_data";
9805 case DW_AT_byte_size
:
9806 return "DW_AT_byte_size";
9807 case DW_AT_bit_offset
:
9808 return "DW_AT_bit_offset";
9809 case DW_AT_bit_size
:
9810 return "DW_AT_bit_size";
9811 case DW_AT_element_list
:
9812 return "DW_AT_element_list";
9813 case DW_AT_stmt_list
:
9814 return "DW_AT_stmt_list";
9816 return "DW_AT_low_pc";
9818 return "DW_AT_high_pc";
9819 case DW_AT_language
:
9820 return "DW_AT_language";
9822 return "DW_AT_member";
9824 return "DW_AT_discr";
9825 case DW_AT_discr_value
:
9826 return "DW_AT_discr_value";
9827 case DW_AT_visibility
:
9828 return "DW_AT_visibility";
9830 return "DW_AT_import";
9831 case DW_AT_string_length
:
9832 return "DW_AT_string_length";
9833 case DW_AT_common_reference
:
9834 return "DW_AT_common_reference";
9835 case DW_AT_comp_dir
:
9836 return "DW_AT_comp_dir";
9837 case DW_AT_const_value
:
9838 return "DW_AT_const_value";
9839 case DW_AT_containing_type
:
9840 return "DW_AT_containing_type";
9841 case DW_AT_default_value
:
9842 return "DW_AT_default_value";
9844 return "DW_AT_inline";
9845 case DW_AT_is_optional
:
9846 return "DW_AT_is_optional";
9847 case DW_AT_lower_bound
:
9848 return "DW_AT_lower_bound";
9849 case DW_AT_producer
:
9850 return "DW_AT_producer";
9851 case DW_AT_prototyped
:
9852 return "DW_AT_prototyped";
9853 case DW_AT_return_addr
:
9854 return "DW_AT_return_addr";
9855 case DW_AT_start_scope
:
9856 return "DW_AT_start_scope";
9857 case DW_AT_bit_stride
:
9858 return "DW_AT_bit_stride";
9859 case DW_AT_upper_bound
:
9860 return "DW_AT_upper_bound";
9861 case DW_AT_abstract_origin
:
9862 return "DW_AT_abstract_origin";
9863 case DW_AT_accessibility
:
9864 return "DW_AT_accessibility";
9865 case DW_AT_address_class
:
9866 return "DW_AT_address_class";
9867 case DW_AT_artificial
:
9868 return "DW_AT_artificial";
9869 case DW_AT_base_types
:
9870 return "DW_AT_base_types";
9871 case DW_AT_calling_convention
:
9872 return "DW_AT_calling_convention";
9874 return "DW_AT_count";
9875 case DW_AT_data_member_location
:
9876 return "DW_AT_data_member_location";
9877 case DW_AT_decl_column
:
9878 return "DW_AT_decl_column";
9879 case DW_AT_decl_file
:
9880 return "DW_AT_decl_file";
9881 case DW_AT_decl_line
:
9882 return "DW_AT_decl_line";
9883 case DW_AT_declaration
:
9884 return "DW_AT_declaration";
9885 case DW_AT_discr_list
:
9886 return "DW_AT_discr_list";
9887 case DW_AT_encoding
:
9888 return "DW_AT_encoding";
9889 case DW_AT_external
:
9890 return "DW_AT_external";
9891 case DW_AT_frame_base
:
9892 return "DW_AT_frame_base";
9894 return "DW_AT_friend";
9895 case DW_AT_identifier_case
:
9896 return "DW_AT_identifier_case";
9897 case DW_AT_macro_info
:
9898 return "DW_AT_macro_info";
9899 case DW_AT_namelist_items
:
9900 return "DW_AT_namelist_items";
9901 case DW_AT_priority
:
9902 return "DW_AT_priority";
9904 return "DW_AT_segment";
9905 case DW_AT_specification
:
9906 return "DW_AT_specification";
9907 case DW_AT_static_link
:
9908 return "DW_AT_static_link";
9910 return "DW_AT_type";
9911 case DW_AT_use_location
:
9912 return "DW_AT_use_location";
9913 case DW_AT_variable_parameter
:
9914 return "DW_AT_variable_parameter";
9915 case DW_AT_virtuality
:
9916 return "DW_AT_virtuality";
9917 case DW_AT_vtable_elem_location
:
9918 return "DW_AT_vtable_elem_location";
9919 /* DWARF 3 values. */
9920 case DW_AT_allocated
:
9921 return "DW_AT_allocated";
9922 case DW_AT_associated
:
9923 return "DW_AT_associated";
9924 case DW_AT_data_location
:
9925 return "DW_AT_data_location";
9926 case DW_AT_byte_stride
:
9927 return "DW_AT_byte_stride";
9928 case DW_AT_entry_pc
:
9929 return "DW_AT_entry_pc";
9930 case DW_AT_use_UTF8
:
9931 return "DW_AT_use_UTF8";
9932 case DW_AT_extension
:
9933 return "DW_AT_extension";
9935 return "DW_AT_ranges";
9936 case DW_AT_trampoline
:
9937 return "DW_AT_trampoline";
9938 case DW_AT_call_column
:
9939 return "DW_AT_call_column";
9940 case DW_AT_call_file
:
9941 return "DW_AT_call_file";
9942 case DW_AT_call_line
:
9943 return "DW_AT_call_line";
9944 case DW_AT_description
:
9945 return "DW_AT_description";
9946 case DW_AT_binary_scale
:
9947 return "DW_AT_binary_scale";
9948 case DW_AT_decimal_scale
:
9949 return "DW_AT_decimal_scale";
9951 return "DW_AT_small";
9952 case DW_AT_decimal_sign
:
9953 return "DW_AT_decimal_sign";
9954 case DW_AT_digit_count
:
9955 return "DW_AT_digit_count";
9956 case DW_AT_picture_string
:
9957 return "DW_AT_picture_string";
9959 return "DW_AT_mutable";
9960 case DW_AT_threads_scaled
:
9961 return "DW_AT_threads_scaled";
9962 case DW_AT_explicit
:
9963 return "DW_AT_explicit";
9964 case DW_AT_object_pointer
:
9965 return "DW_AT_object_pointer";
9966 case DW_AT_endianity
:
9967 return "DW_AT_endianity";
9968 case DW_AT_elemental
:
9969 return "DW_AT_elemental";
9971 return "DW_AT_pure";
9972 case DW_AT_recursive
:
9973 return "DW_AT_recursive";
9974 /* DWARF 4 values. */
9975 case DW_AT_signature
:
9976 return "DW_AT_signature";
9977 case DW_AT_linkage_name
:
9978 return "DW_AT_linkage_name";
9979 /* SGI/MIPS extensions. */
9980 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9981 case DW_AT_MIPS_fde
:
9982 return "DW_AT_MIPS_fde";
9984 case DW_AT_MIPS_loop_begin
:
9985 return "DW_AT_MIPS_loop_begin";
9986 case DW_AT_MIPS_tail_loop_begin
:
9987 return "DW_AT_MIPS_tail_loop_begin";
9988 case DW_AT_MIPS_epilog_begin
:
9989 return "DW_AT_MIPS_epilog_begin";
9990 case DW_AT_MIPS_loop_unroll_factor
:
9991 return "DW_AT_MIPS_loop_unroll_factor";
9992 case DW_AT_MIPS_software_pipeline_depth
:
9993 return "DW_AT_MIPS_software_pipeline_depth";
9994 case DW_AT_MIPS_linkage_name
:
9995 return "DW_AT_MIPS_linkage_name";
9996 case DW_AT_MIPS_stride
:
9997 return "DW_AT_MIPS_stride";
9998 case DW_AT_MIPS_abstract_name
:
9999 return "DW_AT_MIPS_abstract_name";
10000 case DW_AT_MIPS_clone_origin
:
10001 return "DW_AT_MIPS_clone_origin";
10002 case DW_AT_MIPS_has_inlines
:
10003 return "DW_AT_MIPS_has_inlines";
10004 /* HP extensions. */
10005 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
10006 case DW_AT_HP_block_index
:
10007 return "DW_AT_HP_block_index";
10009 case DW_AT_HP_unmodifiable
:
10010 return "DW_AT_HP_unmodifiable";
10011 case DW_AT_HP_actuals_stmt_list
:
10012 return "DW_AT_HP_actuals_stmt_list";
10013 case DW_AT_HP_proc_per_section
:
10014 return "DW_AT_HP_proc_per_section";
10015 case DW_AT_HP_raw_data_ptr
:
10016 return "DW_AT_HP_raw_data_ptr";
10017 case DW_AT_HP_pass_by_reference
:
10018 return "DW_AT_HP_pass_by_reference";
10019 case DW_AT_HP_opt_level
:
10020 return "DW_AT_HP_opt_level";
10021 case DW_AT_HP_prof_version_id
:
10022 return "DW_AT_HP_prof_version_id";
10023 case DW_AT_HP_opt_flags
:
10024 return "DW_AT_HP_opt_flags";
10025 case DW_AT_HP_cold_region_low_pc
:
10026 return "DW_AT_HP_cold_region_low_pc";
10027 case DW_AT_HP_cold_region_high_pc
:
10028 return "DW_AT_HP_cold_region_high_pc";
10029 case DW_AT_HP_all_variables_modifiable
:
10030 return "DW_AT_HP_all_variables_modifiable";
10031 case DW_AT_HP_linkage_name
:
10032 return "DW_AT_HP_linkage_name";
10033 case DW_AT_HP_prof_flags
:
10034 return "DW_AT_HP_prof_flags";
10035 /* GNU extensions. */
10036 case DW_AT_sf_names
:
10037 return "DW_AT_sf_names";
10038 case DW_AT_src_info
:
10039 return "DW_AT_src_info";
10040 case DW_AT_mac_info
:
10041 return "DW_AT_mac_info";
10042 case DW_AT_src_coords
:
10043 return "DW_AT_src_coords";
10044 case DW_AT_body_begin
:
10045 return "DW_AT_body_begin";
10046 case DW_AT_body_end
:
10047 return "DW_AT_body_end";
10048 case DW_AT_GNU_vector
:
10049 return "DW_AT_GNU_vector";
10050 /* VMS extensions. */
10051 case DW_AT_VMS_rtnbeg_pd_address
:
10052 return "DW_AT_VMS_rtnbeg_pd_address";
10053 /* UPC extension. */
10054 case DW_AT_upc_threads_scaled
:
10055 return "DW_AT_upc_threads_scaled";
10056 /* PGI (STMicroelectronics) extensions. */
10057 case DW_AT_PGI_lbase
:
10058 return "DW_AT_PGI_lbase";
10059 case DW_AT_PGI_soffset
:
10060 return "DW_AT_PGI_soffset";
10061 case DW_AT_PGI_lstride
:
10062 return "DW_AT_PGI_lstride";
10064 return "DW_AT_<unknown>";
10068 /* Convert a DWARF value form code into its string name. */
10071 dwarf_form_name (unsigned form
)
10076 return "DW_FORM_addr";
10077 case DW_FORM_block2
:
10078 return "DW_FORM_block2";
10079 case DW_FORM_block4
:
10080 return "DW_FORM_block4";
10081 case DW_FORM_data2
:
10082 return "DW_FORM_data2";
10083 case DW_FORM_data4
:
10084 return "DW_FORM_data4";
10085 case DW_FORM_data8
:
10086 return "DW_FORM_data8";
10087 case DW_FORM_string
:
10088 return "DW_FORM_string";
10089 case DW_FORM_block
:
10090 return "DW_FORM_block";
10091 case DW_FORM_block1
:
10092 return "DW_FORM_block1";
10093 case DW_FORM_data1
:
10094 return "DW_FORM_data1";
10096 return "DW_FORM_flag";
10097 case DW_FORM_sdata
:
10098 return "DW_FORM_sdata";
10100 return "DW_FORM_strp";
10101 case DW_FORM_udata
:
10102 return "DW_FORM_udata";
10103 case DW_FORM_ref_addr
:
10104 return "DW_FORM_ref_addr";
10106 return "DW_FORM_ref1";
10108 return "DW_FORM_ref2";
10110 return "DW_FORM_ref4";
10112 return "DW_FORM_ref8";
10113 case DW_FORM_ref_udata
:
10114 return "DW_FORM_ref_udata";
10115 case DW_FORM_indirect
:
10116 return "DW_FORM_indirect";
10117 case DW_FORM_sec_offset
:
10118 return "DW_FORM_sec_offset";
10119 case DW_FORM_exprloc
:
10120 return "DW_FORM_exprloc";
10121 case DW_FORM_flag_present
:
10122 return "DW_FORM_flag_present";
10124 return "DW_FORM_sig8";
10126 return "DW_FORM_<unknown>";
10130 /* Convert a DWARF stack opcode into its string name. */
10133 dwarf_stack_op_name (unsigned op
, int def
)
10138 return "DW_OP_addr";
10140 return "DW_OP_deref";
10141 case DW_OP_const1u
:
10142 return "DW_OP_const1u";
10143 case DW_OP_const1s
:
10144 return "DW_OP_const1s";
10145 case DW_OP_const2u
:
10146 return "DW_OP_const2u";
10147 case DW_OP_const2s
:
10148 return "DW_OP_const2s";
10149 case DW_OP_const4u
:
10150 return "DW_OP_const4u";
10151 case DW_OP_const4s
:
10152 return "DW_OP_const4s";
10153 case DW_OP_const8u
:
10154 return "DW_OP_const8u";
10155 case DW_OP_const8s
:
10156 return "DW_OP_const8s";
10158 return "DW_OP_constu";
10160 return "DW_OP_consts";
10162 return "DW_OP_dup";
10164 return "DW_OP_drop";
10166 return "DW_OP_over";
10168 return "DW_OP_pick";
10170 return "DW_OP_swap";
10172 return "DW_OP_rot";
10174 return "DW_OP_xderef";
10176 return "DW_OP_abs";
10178 return "DW_OP_and";
10180 return "DW_OP_div";
10182 return "DW_OP_minus";
10184 return "DW_OP_mod";
10186 return "DW_OP_mul";
10188 return "DW_OP_neg";
10190 return "DW_OP_not";
10194 return "DW_OP_plus";
10195 case DW_OP_plus_uconst
:
10196 return "DW_OP_plus_uconst";
10198 return "DW_OP_shl";
10200 return "DW_OP_shr";
10202 return "DW_OP_shra";
10204 return "DW_OP_xor";
10206 return "DW_OP_bra";
10220 return "DW_OP_skip";
10222 return "DW_OP_lit0";
10224 return "DW_OP_lit1";
10226 return "DW_OP_lit2";
10228 return "DW_OP_lit3";
10230 return "DW_OP_lit4";
10232 return "DW_OP_lit5";
10234 return "DW_OP_lit6";
10236 return "DW_OP_lit7";
10238 return "DW_OP_lit8";
10240 return "DW_OP_lit9";
10242 return "DW_OP_lit10";
10244 return "DW_OP_lit11";
10246 return "DW_OP_lit12";
10248 return "DW_OP_lit13";
10250 return "DW_OP_lit14";
10252 return "DW_OP_lit15";
10254 return "DW_OP_lit16";
10256 return "DW_OP_lit17";
10258 return "DW_OP_lit18";
10260 return "DW_OP_lit19";
10262 return "DW_OP_lit20";
10264 return "DW_OP_lit21";
10266 return "DW_OP_lit22";
10268 return "DW_OP_lit23";
10270 return "DW_OP_lit24";
10272 return "DW_OP_lit25";
10274 return "DW_OP_lit26";
10276 return "DW_OP_lit27";
10278 return "DW_OP_lit28";
10280 return "DW_OP_lit29";
10282 return "DW_OP_lit30";
10284 return "DW_OP_lit31";
10286 return "DW_OP_reg0";
10288 return "DW_OP_reg1";
10290 return "DW_OP_reg2";
10292 return "DW_OP_reg3";
10294 return "DW_OP_reg4";
10296 return "DW_OP_reg5";
10298 return "DW_OP_reg6";
10300 return "DW_OP_reg7";
10302 return "DW_OP_reg8";
10304 return "DW_OP_reg9";
10306 return "DW_OP_reg10";
10308 return "DW_OP_reg11";
10310 return "DW_OP_reg12";
10312 return "DW_OP_reg13";
10314 return "DW_OP_reg14";
10316 return "DW_OP_reg15";
10318 return "DW_OP_reg16";
10320 return "DW_OP_reg17";
10322 return "DW_OP_reg18";
10324 return "DW_OP_reg19";
10326 return "DW_OP_reg20";
10328 return "DW_OP_reg21";
10330 return "DW_OP_reg22";
10332 return "DW_OP_reg23";
10334 return "DW_OP_reg24";
10336 return "DW_OP_reg25";
10338 return "DW_OP_reg26";
10340 return "DW_OP_reg27";
10342 return "DW_OP_reg28";
10344 return "DW_OP_reg29";
10346 return "DW_OP_reg30";
10348 return "DW_OP_reg31";
10350 return "DW_OP_breg0";
10352 return "DW_OP_breg1";
10354 return "DW_OP_breg2";
10356 return "DW_OP_breg3";
10358 return "DW_OP_breg4";
10360 return "DW_OP_breg5";
10362 return "DW_OP_breg6";
10364 return "DW_OP_breg7";
10366 return "DW_OP_breg8";
10368 return "DW_OP_breg9";
10370 return "DW_OP_breg10";
10372 return "DW_OP_breg11";
10374 return "DW_OP_breg12";
10376 return "DW_OP_breg13";
10378 return "DW_OP_breg14";
10380 return "DW_OP_breg15";
10382 return "DW_OP_breg16";
10384 return "DW_OP_breg17";
10386 return "DW_OP_breg18";
10388 return "DW_OP_breg19";
10390 return "DW_OP_breg20";
10392 return "DW_OP_breg21";
10394 return "DW_OP_breg22";
10396 return "DW_OP_breg23";
10398 return "DW_OP_breg24";
10400 return "DW_OP_breg25";
10402 return "DW_OP_breg26";
10404 return "DW_OP_breg27";
10406 return "DW_OP_breg28";
10408 return "DW_OP_breg29";
10410 return "DW_OP_breg30";
10412 return "DW_OP_breg31";
10414 return "DW_OP_regx";
10416 return "DW_OP_fbreg";
10418 return "DW_OP_bregx";
10420 return "DW_OP_piece";
10421 case DW_OP_deref_size
:
10422 return "DW_OP_deref_size";
10423 case DW_OP_xderef_size
:
10424 return "DW_OP_xderef_size";
10426 return "DW_OP_nop";
10427 /* DWARF 3 extensions. */
10428 case DW_OP_push_object_address
:
10429 return "DW_OP_push_object_address";
10431 return "DW_OP_call2";
10433 return "DW_OP_call4";
10434 case DW_OP_call_ref
:
10435 return "DW_OP_call_ref";
10436 case DW_OP_form_tls_address
:
10437 return "DW_OP_form_tls_address";
10438 case DW_OP_call_frame_cfa
:
10439 return "DW_OP_call_frame_cfa";
10440 case DW_OP_bit_piece
:
10441 return "DW_OP_bit_piece";
10442 /* DWARF 4 extensions. */
10443 case DW_OP_implicit_value
:
10444 return "DW_OP_implicit_value";
10445 case DW_OP_stack_value
:
10446 return "DW_OP_stack_value";
10447 /* GNU extensions. */
10448 case DW_OP_GNU_push_tls_address
:
10449 return "DW_OP_GNU_push_tls_address";
10450 case DW_OP_GNU_uninit
:
10451 return "DW_OP_GNU_uninit";
10453 return def
? "OP_<unknown>" : NULL
;
10458 dwarf_bool_name (unsigned mybool
)
10466 /* Convert a DWARF type code into its string name. */
10469 dwarf_type_encoding_name (unsigned enc
)
10474 return "DW_ATE_void";
10475 case DW_ATE_address
:
10476 return "DW_ATE_address";
10477 case DW_ATE_boolean
:
10478 return "DW_ATE_boolean";
10479 case DW_ATE_complex_float
:
10480 return "DW_ATE_complex_float";
10482 return "DW_ATE_float";
10483 case DW_ATE_signed
:
10484 return "DW_ATE_signed";
10485 case DW_ATE_signed_char
:
10486 return "DW_ATE_signed_char";
10487 case DW_ATE_unsigned
:
10488 return "DW_ATE_unsigned";
10489 case DW_ATE_unsigned_char
:
10490 return "DW_ATE_unsigned_char";
10492 case DW_ATE_imaginary_float
:
10493 return "DW_ATE_imaginary_float";
10494 case DW_ATE_packed_decimal
:
10495 return "DW_ATE_packed_decimal";
10496 case DW_ATE_numeric_string
:
10497 return "DW_ATE_numeric_string";
10498 case DW_ATE_edited
:
10499 return "DW_ATE_edited";
10500 case DW_ATE_signed_fixed
:
10501 return "DW_ATE_signed_fixed";
10502 case DW_ATE_unsigned_fixed
:
10503 return "DW_ATE_unsigned_fixed";
10504 case DW_ATE_decimal_float
:
10505 return "DW_ATE_decimal_float";
10508 return "DW_ATE_UTF";
10509 /* HP extensions. */
10510 case DW_ATE_HP_float80
:
10511 return "DW_ATE_HP_float80";
10512 case DW_ATE_HP_complex_float80
:
10513 return "DW_ATE_HP_complex_float80";
10514 case DW_ATE_HP_float128
:
10515 return "DW_ATE_HP_float128";
10516 case DW_ATE_HP_complex_float128
:
10517 return "DW_ATE_HP_complex_float128";
10518 case DW_ATE_HP_floathpintel
:
10519 return "DW_ATE_HP_floathpintel";
10520 case DW_ATE_HP_imaginary_float80
:
10521 return "DW_ATE_HP_imaginary_float80";
10522 case DW_ATE_HP_imaginary_float128
:
10523 return "DW_ATE_HP_imaginary_float128";
10525 return "DW_ATE_<unknown>";
10529 /* Convert a DWARF call frame info operation to its string name. */
10533 dwarf_cfi_name (unsigned cfi_opc
)
10537 case DW_CFA_advance_loc
:
10538 return "DW_CFA_advance_loc";
10539 case DW_CFA_offset
:
10540 return "DW_CFA_offset";
10541 case DW_CFA_restore
:
10542 return "DW_CFA_restore";
10544 return "DW_CFA_nop";
10545 case DW_CFA_set_loc
:
10546 return "DW_CFA_set_loc";
10547 case DW_CFA_advance_loc1
:
10548 return "DW_CFA_advance_loc1";
10549 case DW_CFA_advance_loc2
:
10550 return "DW_CFA_advance_loc2";
10551 case DW_CFA_advance_loc4
:
10552 return "DW_CFA_advance_loc4";
10553 case DW_CFA_offset_extended
:
10554 return "DW_CFA_offset_extended";
10555 case DW_CFA_restore_extended
:
10556 return "DW_CFA_restore_extended";
10557 case DW_CFA_undefined
:
10558 return "DW_CFA_undefined";
10559 case DW_CFA_same_value
:
10560 return "DW_CFA_same_value";
10561 case DW_CFA_register
:
10562 return "DW_CFA_register";
10563 case DW_CFA_remember_state
:
10564 return "DW_CFA_remember_state";
10565 case DW_CFA_restore_state
:
10566 return "DW_CFA_restore_state";
10567 case DW_CFA_def_cfa
:
10568 return "DW_CFA_def_cfa";
10569 case DW_CFA_def_cfa_register
:
10570 return "DW_CFA_def_cfa_register";
10571 case DW_CFA_def_cfa_offset
:
10572 return "DW_CFA_def_cfa_offset";
10574 case DW_CFA_def_cfa_expression
:
10575 return "DW_CFA_def_cfa_expression";
10576 case DW_CFA_expression
:
10577 return "DW_CFA_expression";
10578 case DW_CFA_offset_extended_sf
:
10579 return "DW_CFA_offset_extended_sf";
10580 case DW_CFA_def_cfa_sf
:
10581 return "DW_CFA_def_cfa_sf";
10582 case DW_CFA_def_cfa_offset_sf
:
10583 return "DW_CFA_def_cfa_offset_sf";
10584 case DW_CFA_val_offset
:
10585 return "DW_CFA_val_offset";
10586 case DW_CFA_val_offset_sf
:
10587 return "DW_CFA_val_offset_sf";
10588 case DW_CFA_val_expression
:
10589 return "DW_CFA_val_expression";
10590 /* SGI/MIPS specific. */
10591 case DW_CFA_MIPS_advance_loc8
:
10592 return "DW_CFA_MIPS_advance_loc8";
10593 /* GNU extensions. */
10594 case DW_CFA_GNU_window_save
:
10595 return "DW_CFA_GNU_window_save";
10596 case DW_CFA_GNU_args_size
:
10597 return "DW_CFA_GNU_args_size";
10598 case DW_CFA_GNU_negative_offset_extended
:
10599 return "DW_CFA_GNU_negative_offset_extended";
10601 return "DW_CFA_<unknown>";
10607 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10611 print_spaces (indent
, f
);
10612 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10613 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10615 if (die
->parent
!= NULL
)
10617 print_spaces (indent
, f
);
10618 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10619 die
->parent
->offset
);
10622 print_spaces (indent
, f
);
10623 fprintf_unfiltered (f
, " has children: %s\n",
10624 dwarf_bool_name (die
->child
!= NULL
));
10626 print_spaces (indent
, f
);
10627 fprintf_unfiltered (f
, " attributes:\n");
10629 for (i
= 0; i
< die
->num_attrs
; ++i
)
10631 print_spaces (indent
, f
);
10632 fprintf_unfiltered (f
, " %s (%s) ",
10633 dwarf_attr_name (die
->attrs
[i
].name
),
10634 dwarf_form_name (die
->attrs
[i
].form
));
10636 switch (die
->attrs
[i
].form
)
10638 case DW_FORM_ref_addr
:
10640 fprintf_unfiltered (f
, "address: ");
10641 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10643 case DW_FORM_block2
:
10644 case DW_FORM_block4
:
10645 case DW_FORM_block
:
10646 case DW_FORM_block1
:
10647 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10649 case DW_FORM_exprloc
:
10650 fprintf_unfiltered (f
, "expression: size %u",
10651 DW_BLOCK (&die
->attrs
[i
])->size
);
10656 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10657 (long) (DW_ADDR (&die
->attrs
[i
])));
10659 case DW_FORM_data1
:
10660 case DW_FORM_data2
:
10661 case DW_FORM_data4
:
10662 case DW_FORM_data8
:
10663 case DW_FORM_udata
:
10664 case DW_FORM_sdata
:
10665 fprintf_unfiltered (f
, "constant: %s",
10666 pulongest (DW_UNSND (&die
->attrs
[i
])));
10668 case DW_FORM_sec_offset
:
10669 fprintf_unfiltered (f
, "section offset: %s",
10670 pulongest (DW_UNSND (&die
->attrs
[i
])));
10673 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10674 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10675 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10677 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10679 case DW_FORM_string
:
10681 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10682 DW_STRING (&die
->attrs
[i
])
10683 ? DW_STRING (&die
->attrs
[i
]) : "",
10684 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10687 if (DW_UNSND (&die
->attrs
[i
]))
10688 fprintf_unfiltered (f
, "flag: TRUE");
10690 fprintf_unfiltered (f
, "flag: FALSE");
10692 case DW_FORM_flag_present
:
10693 fprintf_unfiltered (f
, "flag: TRUE");
10695 case DW_FORM_indirect
:
10696 /* the reader will have reduced the indirect form to
10697 the "base form" so this form should not occur */
10698 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10701 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10702 die
->attrs
[i
].form
);
10705 fprintf_unfiltered (f
, "\n");
10710 dump_die_for_error (struct die_info
*die
)
10712 dump_die_shallow (gdb_stderr
, 0, die
);
10716 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10718 int indent
= level
* 4;
10720 gdb_assert (die
!= NULL
);
10722 if (level
>= max_level
)
10725 dump_die_shallow (f
, indent
, die
);
10727 if (die
->child
!= NULL
)
10729 print_spaces (indent
, f
);
10730 fprintf_unfiltered (f
, " Children:");
10731 if (level
+ 1 < max_level
)
10733 fprintf_unfiltered (f
, "\n");
10734 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10738 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10742 if (die
->sibling
!= NULL
&& level
> 0)
10744 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10748 /* This is called from the pdie macro in gdbinit.in.
10749 It's not static so gcc will keep a copy callable from gdb. */
10752 dump_die (struct die_info
*die
, int max_level
)
10754 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10758 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10762 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10768 is_ref_attr (struct attribute
*attr
)
10770 switch (attr
->form
)
10772 case DW_FORM_ref_addr
:
10777 case DW_FORM_ref_udata
:
10784 static unsigned int
10785 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10787 if (is_ref_attr (attr
))
10788 return DW_ADDR (attr
);
10790 complaint (&symfile_complaints
,
10791 _("unsupported die ref attribute form: '%s'"),
10792 dwarf_form_name (attr
->form
));
10796 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10797 * the value held by the attribute is not constant. */
10800 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10802 if (attr
->form
== DW_FORM_sdata
)
10803 return DW_SND (attr
);
10804 else if (attr
->form
== DW_FORM_udata
10805 || attr
->form
== DW_FORM_data1
10806 || attr
->form
== DW_FORM_data2
10807 || attr
->form
== DW_FORM_data4
10808 || attr
->form
== DW_FORM_data8
)
10809 return DW_UNSND (attr
);
10812 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10813 dwarf_form_name (attr
->form
));
10814 return default_value
;
10818 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10819 unit and add it to our queue.
10820 The result is non-zero if PER_CU was queued, otherwise the result is zero
10821 meaning either PER_CU is already queued or it is already loaded. */
10824 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10825 struct dwarf2_per_cu_data
*per_cu
)
10827 /* Mark the dependence relation so that we don't flush PER_CU
10829 dwarf2_add_dependence (this_cu
, per_cu
);
10831 /* If it's already on the queue, we have nothing to do. */
10832 if (per_cu
->queued
)
10835 /* If the compilation unit is already loaded, just mark it as
10837 if (per_cu
->cu
!= NULL
)
10839 per_cu
->cu
->last_used
= 0;
10843 /* Add it to the queue. */
10844 queue_comp_unit (per_cu
, this_cu
->objfile
);
10849 /* Follow reference or signature attribute ATTR of SRC_DIE.
10850 On entry *REF_CU is the CU of SRC_DIE.
10851 On exit *REF_CU is the CU of the result. */
10853 static struct die_info
*
10854 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10855 struct dwarf2_cu
**ref_cu
)
10857 struct die_info
*die
;
10859 if (is_ref_attr (attr
))
10860 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10861 else if (attr
->form
== DW_FORM_sig8
)
10862 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10865 dump_die_for_error (src_die
);
10866 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10867 (*ref_cu
)->objfile
->name
);
10873 /* Follow reference OFFSET.
10874 On entry *REF_CU is the CU of source DIE referencing OFFSET.
10875 On exit *REF_CU is the CU of the result. */
10877 static struct die_info
*
10878 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
10880 struct die_info temp_die
;
10881 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10883 gdb_assert (cu
->per_cu
!= NULL
);
10885 if (cu
->per_cu
->from_debug_types
)
10887 /* .debug_types CUs cannot reference anything outside their CU.
10888 If they need to, they have to reference a signatured type via
10890 if (! offset_in_cu_p (&cu
->header
, offset
))
10894 else if (! offset_in_cu_p (&cu
->header
, offset
))
10896 struct dwarf2_per_cu_data
*per_cu
;
10898 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10900 /* If necessary, add it to the queue and load its DIEs. */
10901 if (maybe_queue_comp_unit (cu
, per_cu
))
10902 load_full_comp_unit (per_cu
, cu
->objfile
);
10904 target_cu
= per_cu
->cu
;
10909 *ref_cu
= target_cu
;
10910 temp_die
.offset
= offset
;
10911 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10914 /* Follow reference attribute ATTR of SRC_DIE.
10915 On entry *REF_CU is the CU of SRC_DIE.
10916 On exit *REF_CU is the CU of the result. */
10918 static struct die_info
*
10919 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10920 struct dwarf2_cu
**ref_cu
)
10922 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
10923 struct dwarf2_cu
*cu
= *ref_cu
;
10924 struct die_info
*die
;
10926 die
= follow_die_offset (offset
, ref_cu
);
10928 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10929 "at 0x%x [in module %s]"),
10930 offset
, src_die
->offset
, cu
->objfile
->name
);
10935 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
10936 value is intended for DW_OP_call*. */
10938 struct dwarf2_locexpr_baton
10939 dwarf2_fetch_die_location_block (unsigned int offset
,
10940 struct dwarf2_per_cu_data
*per_cu
)
10942 struct dwarf2_cu
*cu
= per_cu
->cu
;
10943 struct die_info
*die
;
10944 struct attribute
*attr
;
10945 struct dwarf2_locexpr_baton retval
;
10947 die
= follow_die_offset (offset
, &cu
);
10949 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
10950 offset
, per_cu
->cu
->objfile
->name
);
10952 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10955 /* DWARF: "If there is no such attribute, then there is no effect.". */
10957 retval
.data
= NULL
;
10962 if (!attr_form_is_block (attr
))
10963 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
10964 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
10965 offset
, per_cu
->cu
->objfile
->name
);
10967 retval
.data
= DW_BLOCK (attr
)->data
;
10968 retval
.size
= DW_BLOCK (attr
)->size
;
10970 retval
.per_cu
= cu
->per_cu
;
10974 /* Follow the signature attribute ATTR in SRC_DIE.
10975 On entry *REF_CU is the CU of SRC_DIE.
10976 On exit *REF_CU is the CU of the result. */
10978 static struct die_info
*
10979 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10980 struct dwarf2_cu
**ref_cu
)
10982 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10983 struct die_info temp_die
;
10984 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10985 struct dwarf2_cu
*sig_cu
;
10986 struct die_info
*die
;
10988 /* sig_type will be NULL if the signatured type is missing from
10990 if (sig_type
== NULL
)
10991 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10992 "at 0x%x [in module %s]"),
10993 src_die
->offset
, objfile
->name
);
10995 /* If necessary, add it to the queue and load its DIEs. */
10997 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10998 read_signatured_type (objfile
, sig_type
);
11000 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
11002 sig_cu
= sig_type
->per_cu
.cu
;
11003 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
11004 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
11011 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
11012 "at 0x%x [in module %s]"),
11013 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
11016 /* Given an offset of a signatured type, return its signatured_type. */
11018 static struct signatured_type
*
11019 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
11021 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
11022 unsigned int length
, initial_length_size
;
11023 unsigned int sig_offset
;
11024 struct signatured_type find_entry
, *type_sig
;
11026 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
11027 sig_offset
= (initial_length_size
11029 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
11030 + 1 /*address_size*/);
11031 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
11032 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
11034 /* This is only used to lookup previously recorded types.
11035 If we didn't find it, it's our bug. */
11036 gdb_assert (type_sig
!= NULL
);
11037 gdb_assert (offset
== type_sig
->offset
);
11042 /* Read in signatured type at OFFSET and build its CU and die(s). */
11045 read_signatured_type_at_offset (struct objfile
*objfile
,
11046 unsigned int offset
)
11048 struct signatured_type
*type_sig
;
11050 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
11052 /* We have the section offset, but we need the signature to do the
11053 hash table lookup. */
11054 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
11056 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
11058 read_signatured_type (objfile
, type_sig
);
11060 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
11063 /* Read in a signatured type and build its CU and DIEs. */
11066 read_signatured_type (struct objfile
*objfile
,
11067 struct signatured_type
*type_sig
)
11069 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
11070 struct die_reader_specs reader_specs
;
11071 struct dwarf2_cu
*cu
;
11072 ULONGEST signature
;
11073 struct cleanup
*back_to
, *free_cu_cleanup
;
11074 struct attribute
*attr
;
11076 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
11078 cu
= xmalloc (sizeof (struct dwarf2_cu
));
11079 memset (cu
, 0, sizeof (struct dwarf2_cu
));
11080 obstack_init (&cu
->comp_unit_obstack
);
11081 cu
->objfile
= objfile
;
11082 type_sig
->per_cu
.cu
= cu
;
11083 cu
->per_cu
= &type_sig
->per_cu
;
11085 /* If an error occurs while loading, release our storage. */
11086 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
11088 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
11089 types_ptr
, objfile
->obfd
);
11090 gdb_assert (signature
== type_sig
->signature
);
11093 = htab_create_alloc_ex (cu
->header
.length
/ 12,
11097 &cu
->comp_unit_obstack
,
11098 hashtab_obstack_allocate
,
11099 dummy_obstack_deallocate
);
11101 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
11102 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
11104 init_cu_die_reader (&reader_specs
, cu
);
11106 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
11109 /* We try not to read any attributes in this function, because not
11110 all objfiles needed for references have been loaded yet, and symbol
11111 table processing isn't initialized. But we have to set the CU language,
11112 or we won't be able to build types correctly. */
11113 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
11115 set_cu_language (DW_UNSND (attr
), cu
);
11117 set_cu_language (language_minimal
, cu
);
11119 do_cleanups (back_to
);
11121 /* We've successfully allocated this compilation unit. Let our caller
11122 clean it up when finished with it. */
11123 discard_cleanups (free_cu_cleanup
);
11125 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
11126 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
11129 /* Decode simple location descriptions.
11130 Given a pointer to a dwarf block that defines a location, compute
11131 the location and return the value.
11133 NOTE drow/2003-11-18: This function is called in two situations
11134 now: for the address of static or global variables (partial symbols
11135 only) and for offsets into structures which are expected to be
11136 (more or less) constant. The partial symbol case should go away,
11137 and only the constant case should remain. That will let this
11138 function complain more accurately. A few special modes are allowed
11139 without complaint for global variables (for instance, global
11140 register values and thread-local values).
11142 A location description containing no operations indicates that the
11143 object is optimized out. The return value is 0 for that case.
11144 FIXME drow/2003-11-16: No callers check for this case any more; soon all
11145 callers will only want a very basic result and this can become a
11148 Note that stack[0] is unused except as a default error return.
11149 Note that stack overflow is not yet handled. */
11152 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
11154 struct objfile
*objfile
= cu
->objfile
;
11156 int size
= blk
->size
;
11157 gdb_byte
*data
= blk
->data
;
11158 CORE_ADDR stack
[64];
11160 unsigned int bytes_read
, unsnd
;
11204 stack
[++stacki
] = op
- DW_OP_lit0
;
11239 stack
[++stacki
] = op
- DW_OP_reg0
;
11241 dwarf2_complex_location_expr_complaint ();
11245 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
11247 stack
[++stacki
] = unsnd
;
11249 dwarf2_complex_location_expr_complaint ();
11253 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
11258 case DW_OP_const1u
:
11259 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
11263 case DW_OP_const1s
:
11264 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
11268 case DW_OP_const2u
:
11269 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
11273 case DW_OP_const2s
:
11274 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
11278 case DW_OP_const4u
:
11279 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
11283 case DW_OP_const4s
:
11284 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
11289 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
11295 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
11300 stack
[stacki
+ 1] = stack
[stacki
];
11305 stack
[stacki
- 1] += stack
[stacki
];
11309 case DW_OP_plus_uconst
:
11310 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
11315 stack
[stacki
- 1] -= stack
[stacki
];
11320 /* If we're not the last op, then we definitely can't encode
11321 this using GDB's address_class enum. This is valid for partial
11322 global symbols, although the variable's address will be bogus
11325 dwarf2_complex_location_expr_complaint ();
11328 case DW_OP_GNU_push_tls_address
:
11329 /* The top of the stack has the offset from the beginning
11330 of the thread control block at which the variable is located. */
11331 /* Nothing should follow this operator, so the top of stack would
11333 /* This is valid for partial global symbols, but the variable's
11334 address will be bogus in the psymtab. */
11336 dwarf2_complex_location_expr_complaint ();
11339 case DW_OP_GNU_uninit
:
11343 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
11344 dwarf_stack_op_name (op
, 1));
11345 return (stack
[stacki
]);
11348 return (stack
[stacki
]);
11351 /* memory allocation interface */
11353 static struct dwarf_block
*
11354 dwarf_alloc_block (struct dwarf2_cu
*cu
)
11356 struct dwarf_block
*blk
;
11358 blk
= (struct dwarf_block
*)
11359 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
11363 static struct abbrev_info
*
11364 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
11366 struct abbrev_info
*abbrev
;
11368 abbrev
= (struct abbrev_info
*)
11369 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
11370 memset (abbrev
, 0, sizeof (struct abbrev_info
));
11374 static struct die_info
*
11375 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
11377 struct die_info
*die
;
11378 size_t size
= sizeof (struct die_info
);
11381 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
11383 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
11384 memset (die
, 0, sizeof (struct die_info
));
11389 /* Macro support. */
11392 /* Return the full name of file number I in *LH's file name table.
11393 Use COMP_DIR as the name of the current directory of the
11394 compilation. The result is allocated using xmalloc; the caller is
11395 responsible for freeing it. */
11397 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
11399 /* Is the file number a valid index into the line header's file name
11400 table? Remember that file numbers start with one, not zero. */
11401 if (1 <= file
&& file
<= lh
->num_file_names
)
11403 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11405 if (IS_ABSOLUTE_PATH (fe
->name
))
11406 return xstrdup (fe
->name
);
11414 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11420 dir_len
= strlen (dir
);
11421 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
11422 strcpy (full_name
, dir
);
11423 full_name
[dir_len
] = '/';
11424 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
11428 return xstrdup (fe
->name
);
11433 /* The compiler produced a bogus file number. We can at least
11434 record the macro definitions made in the file, even if we
11435 won't be able to find the file by name. */
11436 char fake_name
[80];
11438 sprintf (fake_name
, "<bad macro file number %d>", file
);
11440 complaint (&symfile_complaints
,
11441 _("bad file number in macro information (%d)"),
11444 return xstrdup (fake_name
);
11449 static struct macro_source_file
*
11450 macro_start_file (int file
, int line
,
11451 struct macro_source_file
*current_file
,
11452 const char *comp_dir
,
11453 struct line_header
*lh
, struct objfile
*objfile
)
11455 /* The full name of this source file. */
11456 char *full_name
= file_full_name (file
, lh
, comp_dir
);
11458 /* We don't create a macro table for this compilation unit
11459 at all until we actually get a filename. */
11460 if (! pending_macros
)
11461 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
11462 objfile
->macro_cache
);
11464 if (! current_file
)
11465 /* If we have no current file, then this must be the start_file
11466 directive for the compilation unit's main source file. */
11467 current_file
= macro_set_main (pending_macros
, full_name
);
11469 current_file
= macro_include (current_file
, line
, full_name
);
11473 return current_file
;
11477 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11478 followed by a null byte. */
11480 copy_string (const char *buf
, int len
)
11482 char *s
= xmalloc (len
+ 1);
11484 memcpy (s
, buf
, len
);
11490 static const char *
11491 consume_improper_spaces (const char *p
, const char *body
)
11495 complaint (&symfile_complaints
,
11496 _("macro definition contains spaces in formal argument list:\n`%s'"),
11508 parse_macro_definition (struct macro_source_file
*file
, int line
,
11513 /* The body string takes one of two forms. For object-like macro
11514 definitions, it should be:
11516 <macro name> " " <definition>
11518 For function-like macro definitions, it should be:
11520 <macro name> "() " <definition>
11522 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11524 Spaces may appear only where explicitly indicated, and in the
11527 The Dwarf 2 spec says that an object-like macro's name is always
11528 followed by a space, but versions of GCC around March 2002 omit
11529 the space when the macro's definition is the empty string.
11531 The Dwarf 2 spec says that there should be no spaces between the
11532 formal arguments in a function-like macro's formal argument list,
11533 but versions of GCC around March 2002 include spaces after the
11537 /* Find the extent of the macro name. The macro name is terminated
11538 by either a space or null character (for an object-like macro) or
11539 an opening paren (for a function-like macro). */
11540 for (p
= body
; *p
; p
++)
11541 if (*p
== ' ' || *p
== '(')
11544 if (*p
== ' ' || *p
== '\0')
11546 /* It's an object-like macro. */
11547 int name_len
= p
- body
;
11548 char *name
= copy_string (body
, name_len
);
11549 const char *replacement
;
11552 replacement
= body
+ name_len
+ 1;
11555 dwarf2_macro_malformed_definition_complaint (body
);
11556 replacement
= body
+ name_len
;
11559 macro_define_object (file
, line
, name
, replacement
);
11563 else if (*p
== '(')
11565 /* It's a function-like macro. */
11566 char *name
= copy_string (body
, p
- body
);
11569 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11573 p
= consume_improper_spaces (p
, body
);
11575 /* Parse the formal argument list. */
11576 while (*p
&& *p
!= ')')
11578 /* Find the extent of the current argument name. */
11579 const char *arg_start
= p
;
11581 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11584 if (! *p
|| p
== arg_start
)
11585 dwarf2_macro_malformed_definition_complaint (body
);
11588 /* Make sure argv has room for the new argument. */
11589 if (argc
>= argv_size
)
11592 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11595 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11598 p
= consume_improper_spaces (p
, body
);
11600 /* Consume the comma, if present. */
11605 p
= consume_improper_spaces (p
, body
);
11614 /* Perfectly formed definition, no complaints. */
11615 macro_define_function (file
, line
, name
,
11616 argc
, (const char **) argv
,
11618 else if (*p
== '\0')
11620 /* Complain, but do define it. */
11621 dwarf2_macro_malformed_definition_complaint (body
);
11622 macro_define_function (file
, line
, name
,
11623 argc
, (const char **) argv
,
11627 /* Just complain. */
11628 dwarf2_macro_malformed_definition_complaint (body
);
11631 /* Just complain. */
11632 dwarf2_macro_malformed_definition_complaint (body
);
11638 for (i
= 0; i
< argc
; i
++)
11644 dwarf2_macro_malformed_definition_complaint (body
);
11649 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11650 char *comp_dir
, bfd
*abfd
,
11651 struct dwarf2_cu
*cu
)
11653 gdb_byte
*mac_ptr
, *mac_end
;
11654 struct macro_source_file
*current_file
= 0;
11655 enum dwarf_macinfo_record_type macinfo_type
;
11656 int at_commandline
;
11658 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11659 &dwarf2_per_objfile
->macinfo
);
11660 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11662 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11666 /* First pass: Find the name of the base filename.
11667 This filename is needed in order to process all macros whose definition
11668 (or undefinition) comes from the command line. These macros are defined
11669 before the first DW_MACINFO_start_file entry, and yet still need to be
11670 associated to the base file.
11672 To determine the base file name, we scan the macro definitions until we
11673 reach the first DW_MACINFO_start_file entry. We then initialize
11674 CURRENT_FILE accordingly so that any macro definition found before the
11675 first DW_MACINFO_start_file can still be associated to the base file. */
11677 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11678 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11679 + dwarf2_per_objfile
->macinfo
.size
;
11683 /* Do we at least have room for a macinfo type byte? */
11684 if (mac_ptr
>= mac_end
)
11686 /* Complaint is printed during the second pass as GDB will probably
11687 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11691 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11694 switch (macinfo_type
)
11696 /* A zero macinfo type indicates the end of the macro
11701 case DW_MACINFO_define
:
11702 case DW_MACINFO_undef
:
11703 /* Only skip the data by MAC_PTR. */
11705 unsigned int bytes_read
;
11707 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11708 mac_ptr
+= bytes_read
;
11709 read_string (abfd
, mac_ptr
, &bytes_read
);
11710 mac_ptr
+= bytes_read
;
11714 case DW_MACINFO_start_file
:
11716 unsigned int bytes_read
;
11719 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11720 mac_ptr
+= bytes_read
;
11721 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11722 mac_ptr
+= bytes_read
;
11724 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11729 case DW_MACINFO_end_file
:
11730 /* No data to skip by MAC_PTR. */
11733 case DW_MACINFO_vendor_ext
:
11734 /* Only skip the data by MAC_PTR. */
11736 unsigned int bytes_read
;
11738 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11739 mac_ptr
+= bytes_read
;
11740 read_string (abfd
, mac_ptr
, &bytes_read
);
11741 mac_ptr
+= bytes_read
;
11748 } while (macinfo_type
!= 0 && current_file
== NULL
);
11750 /* Second pass: Process all entries.
11752 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11753 command-line macro definitions/undefinitions. This flag is unset when we
11754 reach the first DW_MACINFO_start_file entry. */
11756 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11758 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11759 GDB is still reading the definitions from command line. First
11760 DW_MACINFO_start_file will need to be ignored as it was already executed
11761 to create CURRENT_FILE for the main source holding also the command line
11762 definitions. On first met DW_MACINFO_start_file this flag is reset to
11763 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11765 at_commandline
= 1;
11769 /* Do we at least have room for a macinfo type byte? */
11770 if (mac_ptr
>= mac_end
)
11772 dwarf2_macros_too_long_complaint ();
11776 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11779 switch (macinfo_type
)
11781 /* A zero macinfo type indicates the end of the macro
11786 case DW_MACINFO_define
:
11787 case DW_MACINFO_undef
:
11789 unsigned int bytes_read
;
11793 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11794 mac_ptr
+= bytes_read
;
11795 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11796 mac_ptr
+= bytes_read
;
11798 if (! current_file
)
11800 /* DWARF violation as no main source is present. */
11801 complaint (&symfile_complaints
,
11802 _("debug info with no main source gives macro %s "
11804 macinfo_type
== DW_MACINFO_define
?
11806 macinfo_type
== DW_MACINFO_undef
?
11807 _("undefinition") :
11808 _("something-or-other"), line
, body
);
11811 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11812 complaint (&symfile_complaints
,
11813 _("debug info gives %s macro %s with %s line %d: %s"),
11814 at_commandline
? _("command-line") : _("in-file"),
11815 macinfo_type
== DW_MACINFO_define
?
11817 macinfo_type
== DW_MACINFO_undef
?
11818 _("undefinition") :
11819 _("something-or-other"),
11820 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11822 if (macinfo_type
== DW_MACINFO_define
)
11823 parse_macro_definition (current_file
, line
, body
);
11824 else if (macinfo_type
== DW_MACINFO_undef
)
11825 macro_undef (current_file
, line
, body
);
11829 case DW_MACINFO_start_file
:
11831 unsigned int bytes_read
;
11834 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11835 mac_ptr
+= bytes_read
;
11836 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11837 mac_ptr
+= bytes_read
;
11839 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11840 complaint (&symfile_complaints
,
11841 _("debug info gives source %d included "
11842 "from %s at %s line %d"),
11843 file
, at_commandline
? _("command-line") : _("file"),
11844 line
== 0 ? _("zero") : _("non-zero"), line
);
11846 if (at_commandline
)
11848 /* This DW_MACINFO_start_file was executed in the pass one. */
11849 at_commandline
= 0;
11852 current_file
= macro_start_file (file
, line
,
11853 current_file
, comp_dir
,
11858 case DW_MACINFO_end_file
:
11859 if (! current_file
)
11860 complaint (&symfile_complaints
,
11861 _("macro debug info has an unmatched `close_file' directive"));
11864 current_file
= current_file
->included_by
;
11865 if (! current_file
)
11867 enum dwarf_macinfo_record_type next_type
;
11869 /* GCC circa March 2002 doesn't produce the zero
11870 type byte marking the end of the compilation
11871 unit. Complain if it's not there, but exit no
11874 /* Do we at least have room for a macinfo type byte? */
11875 if (mac_ptr
>= mac_end
)
11877 dwarf2_macros_too_long_complaint ();
11881 /* We don't increment mac_ptr here, so this is just
11883 next_type
= read_1_byte (abfd
, mac_ptr
);
11884 if (next_type
!= 0)
11885 complaint (&symfile_complaints
,
11886 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11893 case DW_MACINFO_vendor_ext
:
11895 unsigned int bytes_read
;
11899 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11900 mac_ptr
+= bytes_read
;
11901 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11902 mac_ptr
+= bytes_read
;
11904 /* We don't recognize any vendor extensions. */
11908 } while (macinfo_type
!= 0);
11911 /* Check if the attribute's form is a DW_FORM_block*
11912 if so return true else false. */
11914 attr_form_is_block (struct attribute
*attr
)
11916 return (attr
== NULL
? 0 :
11917 attr
->form
== DW_FORM_block1
11918 || attr
->form
== DW_FORM_block2
11919 || attr
->form
== DW_FORM_block4
11920 || attr
->form
== DW_FORM_block
11921 || attr
->form
== DW_FORM_exprloc
);
11924 /* Return non-zero if ATTR's value is a section offset --- classes
11925 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11926 You may use DW_UNSND (attr) to retrieve such offsets.
11928 Section 7.5.4, "Attribute Encodings", explains that no attribute
11929 may have a value that belongs to more than one of these classes; it
11930 would be ambiguous if we did, because we use the same forms for all
11933 attr_form_is_section_offset (struct attribute
*attr
)
11935 return (attr
->form
== DW_FORM_data4
11936 || attr
->form
== DW_FORM_data8
11937 || attr
->form
== DW_FORM_sec_offset
);
11941 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11942 zero otherwise. When this function returns true, you can apply
11943 dwarf2_get_attr_constant_value to it.
11945 However, note that for some attributes you must check
11946 attr_form_is_section_offset before using this test. DW_FORM_data4
11947 and DW_FORM_data8 are members of both the constant class, and of
11948 the classes that contain offsets into other debug sections
11949 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11950 that, if an attribute's can be either a constant or one of the
11951 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11952 taken as section offsets, not constants. */
11954 attr_form_is_constant (struct attribute
*attr
)
11956 switch (attr
->form
)
11958 case DW_FORM_sdata
:
11959 case DW_FORM_udata
:
11960 case DW_FORM_data1
:
11961 case DW_FORM_data2
:
11962 case DW_FORM_data4
:
11963 case DW_FORM_data8
:
11971 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11972 struct dwarf2_cu
*cu
)
11974 if (attr_form_is_section_offset (attr
)
11975 /* ".debug_loc" may not exist at all, or the offset may be outside
11976 the section. If so, fall through to the complaint in the
11978 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11980 struct dwarf2_loclist_baton
*baton
;
11982 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11983 sizeof (struct dwarf2_loclist_baton
));
11984 baton
->per_cu
= cu
->per_cu
;
11985 gdb_assert (baton
->per_cu
);
11987 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11988 &dwarf2_per_objfile
->loc
);
11990 /* We don't know how long the location list is, but make sure we
11991 don't run off the edge of the section. */
11992 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11993 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11994 baton
->base_address
= cu
->base_address
;
11995 if (cu
->base_known
== 0)
11996 complaint (&symfile_complaints
,
11997 _("Location list used without specifying the CU base address."));
11999 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
12000 SYMBOL_LOCATION_BATON (sym
) = baton
;
12004 struct dwarf2_locexpr_baton
*baton
;
12006 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
12007 sizeof (struct dwarf2_locexpr_baton
));
12008 baton
->per_cu
= cu
->per_cu
;
12009 gdb_assert (baton
->per_cu
);
12011 if (attr_form_is_block (attr
))
12013 /* Note that we're just copying the block's data pointer
12014 here, not the actual data. We're still pointing into the
12015 info_buffer for SYM's objfile; right now we never release
12016 that buffer, but when we do clean up properly this may
12018 baton
->size
= DW_BLOCK (attr
)->size
;
12019 baton
->data
= DW_BLOCK (attr
)->data
;
12023 dwarf2_invalid_attrib_class_complaint ("location description",
12024 SYMBOL_NATURAL_NAME (sym
));
12026 baton
->data
= NULL
;
12029 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
12030 SYMBOL_LOCATION_BATON (sym
) = baton
;
12034 /* Return the OBJFILE associated with the compilation unit CU. */
12037 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
12039 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
12041 /* Return the master objfile, so that we can report and look up the
12042 correct file containing this variable. */
12043 if (objfile
->separate_debug_objfile_backlink
)
12044 objfile
= objfile
->separate_debug_objfile_backlink
;
12049 /* Return the address size given in the compilation unit header for CU. */
12052 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
12055 return per_cu
->cu
->header
.addr_size
;
12058 /* If the CU is not currently read in, we re-read its header. */
12059 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
12060 struct dwarf2_per_objfile
*per_objfile
12061 = objfile_data (objfile
, dwarf2_objfile_data_key
);
12062 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
12063 struct comp_unit_head cu_header
;
12065 memset (&cu_header
, 0, sizeof cu_header
);
12066 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
12067 return cu_header
.addr_size
;
12071 /* Return the offset size given in the compilation unit header for CU. */
12074 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
12077 return per_cu
->cu
->header
.offset_size
;
12080 /* If the CU is not currently read in, we re-read its header. */
12081 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
12082 struct dwarf2_per_objfile
*per_objfile
12083 = objfile_data (objfile
, dwarf2_objfile_data_key
);
12084 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
12085 struct comp_unit_head cu_header
;
12087 memset (&cu_header
, 0, sizeof cu_header
);
12088 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
12089 return cu_header
.offset_size
;
12093 /* Locate the .debug_info compilation unit from CU's objfile which contains
12094 the DIE at OFFSET. Raises an error on failure. */
12096 static struct dwarf2_per_cu_data
*
12097 dwarf2_find_containing_comp_unit (unsigned int offset
,
12098 struct objfile
*objfile
)
12100 struct dwarf2_per_cu_data
*this_cu
;
12104 high
= dwarf2_per_objfile
->n_comp_units
- 1;
12107 int mid
= low
+ (high
- low
) / 2;
12109 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
12114 gdb_assert (low
== high
);
12115 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
12118 error (_("Dwarf Error: could not find partial DIE containing "
12119 "offset 0x%lx [in module %s]"),
12120 (long) offset
, bfd_get_filename (objfile
->obfd
));
12122 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
12123 return dwarf2_per_objfile
->all_comp_units
[low
-1];
12127 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
12128 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
12129 && offset
>= this_cu
->offset
+ this_cu
->length
)
12130 error (_("invalid dwarf2 offset %u"), offset
);
12131 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
12136 /* Locate the compilation unit from OBJFILE which is located at exactly
12137 OFFSET. Raises an error on failure. */
12139 static struct dwarf2_per_cu_data
*
12140 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
12142 struct dwarf2_per_cu_data
*this_cu
;
12144 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
12145 if (this_cu
->offset
!= offset
)
12146 error (_("no compilation unit with offset %u."), offset
);
12150 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
12152 static struct dwarf2_cu
*
12153 alloc_one_comp_unit (struct objfile
*objfile
)
12155 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
12156 cu
->objfile
= objfile
;
12157 obstack_init (&cu
->comp_unit_obstack
);
12161 /* Release one cached compilation unit, CU. We unlink it from the tree
12162 of compilation units, but we don't remove it from the read_in_chain;
12163 the caller is responsible for that.
12164 NOTE: DATA is a void * because this function is also used as a
12165 cleanup routine. */
12168 free_one_comp_unit (void *data
)
12170 struct dwarf2_cu
*cu
= data
;
12172 if (cu
->per_cu
!= NULL
)
12173 cu
->per_cu
->cu
= NULL
;
12176 obstack_free (&cu
->comp_unit_obstack
, NULL
);
12181 /* This cleanup function is passed the address of a dwarf2_cu on the stack
12182 when we're finished with it. We can't free the pointer itself, but be
12183 sure to unlink it from the cache. Also release any associated storage
12184 and perform cache maintenance.
12186 Only used during partial symbol parsing. */
12189 free_stack_comp_unit (void *data
)
12191 struct dwarf2_cu
*cu
= data
;
12193 obstack_free (&cu
->comp_unit_obstack
, NULL
);
12194 cu
->partial_dies
= NULL
;
12196 if (cu
->per_cu
!= NULL
)
12198 /* This compilation unit is on the stack in our caller, so we
12199 should not xfree it. Just unlink it. */
12200 cu
->per_cu
->cu
= NULL
;
12203 /* If we had a per-cu pointer, then we may have other compilation
12204 units loaded, so age them now. */
12205 age_cached_comp_units ();
12209 /* Free all cached compilation units. */
12212 free_cached_comp_units (void *data
)
12214 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12216 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12217 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12218 while (per_cu
!= NULL
)
12220 struct dwarf2_per_cu_data
*next_cu
;
12222 next_cu
= per_cu
->cu
->read_in_chain
;
12224 free_one_comp_unit (per_cu
->cu
);
12225 *last_chain
= next_cu
;
12231 /* Increase the age counter on each cached compilation unit, and free
12232 any that are too old. */
12235 age_cached_comp_units (void)
12237 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12239 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
12240 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12241 while (per_cu
!= NULL
)
12243 per_cu
->cu
->last_used
++;
12244 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
12245 dwarf2_mark (per_cu
->cu
);
12246 per_cu
= per_cu
->cu
->read_in_chain
;
12249 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12250 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12251 while (per_cu
!= NULL
)
12253 struct dwarf2_per_cu_data
*next_cu
;
12255 next_cu
= per_cu
->cu
->read_in_chain
;
12257 if (!per_cu
->cu
->mark
)
12259 free_one_comp_unit (per_cu
->cu
);
12260 *last_chain
= next_cu
;
12263 last_chain
= &per_cu
->cu
->read_in_chain
;
12269 /* Remove a single compilation unit from the cache. */
12272 free_one_cached_comp_unit (void *target_cu
)
12274 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12276 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12277 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12278 while (per_cu
!= NULL
)
12280 struct dwarf2_per_cu_data
*next_cu
;
12282 next_cu
= per_cu
->cu
->read_in_chain
;
12284 if (per_cu
->cu
== target_cu
)
12286 free_one_comp_unit (per_cu
->cu
);
12287 *last_chain
= next_cu
;
12291 last_chain
= &per_cu
->cu
->read_in_chain
;
12297 /* Release all extra memory associated with OBJFILE. */
12300 dwarf2_free_objfile (struct objfile
*objfile
)
12302 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
12304 if (dwarf2_per_objfile
== NULL
)
12307 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
12308 free_cached_comp_units (NULL
);
12310 /* Everything else should be on the objfile obstack. */
12313 /* A pair of DIE offset and GDB type pointer. We store these
12314 in a hash table separate from the DIEs, and preserve them
12315 when the DIEs are flushed out of cache. */
12317 struct dwarf2_offset_and_type
12319 unsigned int offset
;
12323 /* Hash function for a dwarf2_offset_and_type. */
12326 offset_and_type_hash (const void *item
)
12328 const struct dwarf2_offset_and_type
*ofs
= item
;
12330 return ofs
->offset
;
12333 /* Equality function for a dwarf2_offset_and_type. */
12336 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
12338 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
12339 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
12341 return ofs_lhs
->offset
== ofs_rhs
->offset
;
12344 /* Set the type associated with DIE to TYPE. Save it in CU's hash
12345 table if necessary. For convenience, return TYPE.
12347 The DIEs reading must have careful ordering to:
12348 * Not cause infite loops trying to read in DIEs as a prerequisite for
12349 reading current DIE.
12350 * Not trying to dereference contents of still incompletely read in types
12351 while reading in other DIEs.
12352 * Enable referencing still incompletely read in types just by a pointer to
12353 the type without accessing its fields.
12355 Therefore caller should follow these rules:
12356 * Try to fetch any prerequisite types we may need to build this DIE type
12357 before building the type and calling set_die_type.
12358 * After building typer call set_die_type for current DIE as soon as
12359 possible before fetching more types to complete the current type.
12360 * Make the type as complete as possible before fetching more types. */
12362 static struct type
*
12363 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
12365 struct dwarf2_offset_and_type
**slot
, ofs
;
12367 /* For Ada types, make sure that the gnat-specific data is always
12368 initialized (if not already set). There are a few types where
12369 we should not be doing so, because the type-specific area is
12370 already used to hold some other piece of info (eg: TYPE_CODE_FLT
12371 where the type-specific area is used to store the floatformat).
12372 But this is not a problem, because the gnat-specific information
12373 is actually not needed for these types. */
12374 if (need_gnat_info (cu
)
12375 && TYPE_CODE (type
) != TYPE_CODE_FUNC
12376 && TYPE_CODE (type
) != TYPE_CODE_FLT
12377 && !HAVE_GNAT_AUX_INFO (type
))
12378 INIT_GNAT_SPECIFIC (type
);
12380 if (cu
->type_hash
== NULL
)
12382 gdb_assert (cu
->per_cu
!= NULL
);
12383 cu
->per_cu
->type_hash
12384 = htab_create_alloc_ex (cu
->header
.length
/ 24,
12385 offset_and_type_hash
,
12386 offset_and_type_eq
,
12388 &cu
->objfile
->objfile_obstack
,
12389 hashtab_obstack_allocate
,
12390 dummy_obstack_deallocate
);
12391 cu
->type_hash
= cu
->per_cu
->type_hash
;
12394 ofs
.offset
= die
->offset
;
12396 slot
= (struct dwarf2_offset_and_type
**)
12397 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
12399 complaint (&symfile_complaints
,
12400 _("A problem internal to GDB: DIE 0x%x has type already set"),
12402 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
12407 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
12408 not have a saved type. */
12410 static struct type
*
12411 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12413 struct dwarf2_offset_and_type
*slot
, ofs
;
12414 htab_t type_hash
= cu
->type_hash
;
12416 if (type_hash
== NULL
)
12419 ofs
.offset
= die
->offset
;
12420 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
12427 /* Add a dependence relationship from CU to REF_PER_CU. */
12430 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
12431 struct dwarf2_per_cu_data
*ref_per_cu
)
12435 if (cu
->dependencies
== NULL
)
12437 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
12438 NULL
, &cu
->comp_unit_obstack
,
12439 hashtab_obstack_allocate
,
12440 dummy_obstack_deallocate
);
12442 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
12444 *slot
= ref_per_cu
;
12447 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12448 Set the mark field in every compilation unit in the
12449 cache that we must keep because we are keeping CU. */
12452 dwarf2_mark_helper (void **slot
, void *data
)
12454 struct dwarf2_per_cu_data
*per_cu
;
12456 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
12457 if (per_cu
->cu
->mark
)
12459 per_cu
->cu
->mark
= 1;
12461 if (per_cu
->cu
->dependencies
!= NULL
)
12462 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12467 /* Set the mark field in CU and in every other compilation unit in the
12468 cache that we must keep because we are keeping CU. */
12471 dwarf2_mark (struct dwarf2_cu
*cu
)
12476 if (cu
->dependencies
!= NULL
)
12477 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12481 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
12485 per_cu
->cu
->mark
= 0;
12486 per_cu
= per_cu
->cu
->read_in_chain
;
12490 /* Trivial hash function for partial_die_info: the hash value of a DIE
12491 is its offset in .debug_info for this objfile. */
12494 partial_die_hash (const void *item
)
12496 const struct partial_die_info
*part_die
= item
;
12498 return part_die
->offset
;
12501 /* Trivial comparison function for partial_die_info structures: two DIEs
12502 are equal if they have the same offset. */
12505 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
12507 const struct partial_die_info
*part_die_lhs
= item_lhs
;
12508 const struct partial_die_info
*part_die_rhs
= item_rhs
;
12510 return part_die_lhs
->offset
== part_die_rhs
->offset
;
12513 static struct cmd_list_element
*set_dwarf2_cmdlist
;
12514 static struct cmd_list_element
*show_dwarf2_cmdlist
;
12517 set_dwarf2_cmd (char *args
, int from_tty
)
12519 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
12523 show_dwarf2_cmd (char *args
, int from_tty
)
12525 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
12528 /* If section described by INFO was mmapped, munmap it now. */
12531 munmap_section_buffer (struct dwarf2_section_info
*info
)
12533 if (info
->was_mmapped
)
12536 intptr_t begin
= (intptr_t) info
->buffer
;
12537 intptr_t map_begin
= begin
& ~(pagesize
- 1);
12538 size_t map_length
= info
->size
+ begin
- map_begin
;
12540 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
12542 /* Without HAVE_MMAP, we should never be here to begin with. */
12548 /* munmap debug sections for OBJFILE, if necessary. */
12551 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
12553 struct dwarf2_per_objfile
*data
= d
;
12555 munmap_section_buffer (&data
->info
);
12556 munmap_section_buffer (&data
->abbrev
);
12557 munmap_section_buffer (&data
->line
);
12558 munmap_section_buffer (&data
->str
);
12559 munmap_section_buffer (&data
->macinfo
);
12560 munmap_section_buffer (&data
->ranges
);
12561 munmap_section_buffer (&data
->loc
);
12562 munmap_section_buffer (&data
->frame
);
12563 munmap_section_buffer (&data
->eh_frame
);
12566 int dwarf2_always_disassemble
;
12569 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
12570 struct cmd_list_element
*c
, const char *value
)
12572 fprintf_filtered (file
, _("\
12573 Whether to always disassemble DWARF expressions is %s.\n"),
12577 void _initialize_dwarf2_read (void);
12580 _initialize_dwarf2_read (void)
12582 dwarf2_objfile_data_key
12583 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
12585 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
12586 Set DWARF 2 specific variables.\n\
12587 Configure DWARF 2 variables such as the cache size"),
12588 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
12589 0/*allow-unknown*/, &maintenance_set_cmdlist
);
12591 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
12592 Show DWARF 2 specific variables\n\
12593 Show DWARF 2 variables such as the cache size"),
12594 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
12595 0/*allow-unknown*/, &maintenance_show_cmdlist
);
12597 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
12598 &dwarf2_max_cache_age
, _("\
12599 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12600 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12601 A higher limit means that cached compilation units will be stored\n\
12602 in memory longer, and more total memory will be used. Zero disables\n\
12603 caching, which can slow down startup."),
12605 show_dwarf2_max_cache_age
,
12606 &set_dwarf2_cmdlist
,
12607 &show_dwarf2_cmdlist
);
12609 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
12610 &dwarf2_always_disassemble
, _("\
12611 Set whether `info address' always disassembles DWARF expressions."), _("\
12612 Show whether `info address' always disassembles DWARF expressions."), _("\
12613 When enabled, DWARF expressions are always printed in an assembly-like\n\
12614 syntax. When disabled, expressions will be printed in a more\n\
12615 conversational style, when possible."),
12617 show_dwarf2_always_disassemble
,
12618 &set_dwarf2_cmdlist
,
12619 &show_dwarf2_cmdlist
);
12621 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12622 Set debugging of the dwarf2 DIE reader."), _("\
12623 Show debugging of the dwarf2 DIE reader."), _("\
12624 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12625 The value is the maximum depth to print."),
12628 &setdebuglist
, &showdebuglist
);