1 /* DWARF 2 debugging format support for GDB.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
11 support in dwarfread.c
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 2 of the License, or (at
18 your option) any later version.
20 This program is distributed in the hope that it will be useful, but
21 WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program; if not, write to the Free Software
27 Foundation, Inc., 59 Temple Place - Suite 330,
28 Boston, MA 02111-1307, USA. */
35 #include "elf/dwarf2.h"
38 #include "expression.h"
39 #include "filenames.h" /* for DOSish file names */
42 #include "complaints.h"
44 #include "dwarf2expr.h"
45 #include "dwarf2loc.h"
46 #include "cp-support.h"
50 #include "gdb_string.h"
51 #include "gdb_assert.h"
52 #include <sys/types.h>
54 /* A note on memory usage for this file.
56 At the present time, this code reads the debug info sections into
57 the objfile's objfile_obstack. A definite improvement for startup
58 time, on platforms which do not emit relocations for debug
59 sections, would be to use mmap instead. The object's complete
60 debug information is loaded into memory, partly to simplify
61 absolute DIE references.
63 Whether using obstacks or mmap, the sections should remain loaded
64 until the objfile is released, and pointers into the section data
65 can be used for any other data associated to the objfile (symbol
66 names, type names, location expressions to name a few). */
68 #ifndef DWARF2_REG_TO_REGNUM
69 #define DWARF2_REG_TO_REGNUM(REG) (REG)
73 /* .debug_info header for a compilation unit
74 Because of alignment constraints, this structure has padding and cannot
75 be mapped directly onto the beginning of the .debug_info section. */
76 typedef struct comp_unit_header
78 unsigned int length; /* length of the .debug_info
80 unsigned short version; /* version number -- 2 for DWARF
82 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
83 unsigned char addr_size; /* byte size of an address -- 4 */
86 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
89 /* .debug_pubnames header
90 Because of alignment constraints, this structure has padding and cannot
91 be mapped directly onto the beginning of the .debug_info section. */
92 typedef struct pubnames_header
94 unsigned int length; /* length of the .debug_pubnames
96 unsigned char version; /* version number -- 2 for DWARF
98 unsigned int info_offset; /* offset into .debug_info section */
99 unsigned int info_size; /* byte size of .debug_info section
103 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
105 /* .debug_pubnames header
106 Because of alignment constraints, this structure has padding and cannot
107 be mapped directly onto the beginning of the .debug_info section. */
108 typedef struct aranges_header
110 unsigned int length; /* byte len of the .debug_aranges
112 unsigned short version; /* version number -- 2 for DWARF
114 unsigned int info_offset; /* offset into .debug_info section */
115 unsigned char addr_size; /* byte size of an address */
116 unsigned char seg_size; /* byte size of segment descriptor */
119 #define _ACTUAL_ARANGES_HEADER_SIZE 12
121 /* .debug_line statement program prologue
122 Because of alignment constraints, this structure has padding and cannot
123 be mapped directly onto the beginning of the .debug_info section. */
124 typedef struct statement_prologue
126 unsigned int total_length; /* byte length of the statement
128 unsigned short version; /* version number -- 2 for DWARF
130 unsigned int prologue_length; /* # bytes between prologue &
132 unsigned char minimum_instruction_length; /* byte size of
134 unsigned char default_is_stmt; /* initial value of is_stmt
137 unsigned char line_range;
138 unsigned char opcode_base; /* number assigned to first special
140 unsigned char *standard_opcode_lengths;
144 static const struct objfile_data *dwarf2_objfile_data_key;
146 struct dwarf2_per_objfile
148 /* Sizes of debugging sections. */
149 unsigned int info_size;
150 unsigned int abbrev_size;
151 unsigned int line_size;
152 unsigned int pubnames_size;
153 unsigned int aranges_size;
154 unsigned int loc_size;
155 unsigned int macinfo_size;
156 unsigned int str_size;
157 unsigned int ranges_size;
158 unsigned int frame_size;
159 unsigned int eh_frame_size;
161 /* Loaded data from the sections. */
166 char *macinfo_buffer;
171 static struct dwarf2_per_objfile *dwarf2_per_objfile;
173 static asection *dwarf_info_section;
174 static asection *dwarf_abbrev_section;
175 static asection *dwarf_line_section;
176 static asection *dwarf_pubnames_section;
177 static asection *dwarf_aranges_section;
178 static asection *dwarf_loc_section;
179 static asection *dwarf_macinfo_section;
180 static asection *dwarf_str_section;
181 static asection *dwarf_ranges_section;
182 asection *dwarf_frame_section;
183 asection *dwarf_eh_frame_section;
185 /* names of the debugging sections */
187 #define INFO_SECTION ".debug_info"
188 #define ABBREV_SECTION ".debug_abbrev"
189 #define LINE_SECTION ".debug_line"
190 #define PUBNAMES_SECTION ".debug_pubnames"
191 #define ARANGES_SECTION ".debug_aranges"
192 #define LOC_SECTION ".debug_loc"
193 #define MACINFO_SECTION ".debug_macinfo"
194 #define STR_SECTION ".debug_str"
195 #define RANGES_SECTION ".debug_ranges"
196 #define FRAME_SECTION ".debug_frame"
197 #define EH_FRAME_SECTION ".eh_frame"
199 /* local data types */
201 /* We hold several abbreviation tables in memory at the same time. */
202 #ifndef ABBREV_HASH_SIZE
203 #define ABBREV_HASH_SIZE 121
206 /* The data in a compilation unit header, after target2host
207 translation, looks like this. */
208 struct comp_unit_head
210 unsigned long length;
212 unsigned int abbrev_offset;
213 unsigned char addr_size;
214 unsigned char signed_addr_p;
215 unsigned int offset_size; /* size of file offsets; either 4 or 8 */
216 unsigned int initial_length_size; /* size of the length field; either
219 /* Offset to the first byte of this compilation unit header in the
220 * .debug_info section, for resolving relative reference dies. */
224 /* Pointer to this compilation unit header in the .debug_info
229 /* Pointer to the first die of this compilatio unit. This will
230 * be the first byte following the compilation unit header. */
234 /* Pointer to the next compilation unit header in the program. */
236 struct comp_unit_head *next;
238 /* Base address of this compilation unit. */
240 CORE_ADDR base_address;
242 /* Non-zero if base_address has been set. */
247 /* Internal state when decoding a particular compilation unit. */
250 /* The objfile containing this compilation unit. */
251 struct objfile *objfile;
253 /* The header of the compilation unit.
255 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
256 should logically be moved to the dwarf2_cu structure. */
257 struct comp_unit_head header;
259 struct function_range *first_fn, *last_fn, *cached_fn;
261 /* The language we are debugging. */
262 enum language language;
263 const struct language_defn *language_defn;
265 const char *producer;
267 /* The generic symbol table building routines have separate lists for
268 file scope symbols and all all other scopes (local scopes). So
269 we need to select the right one to pass to add_symbol_to_list().
270 We do it by keeping a pointer to the correct list in list_in_scope.
272 FIXME: The original dwarf code just treated the file scope as the
273 first local scope, and all other local scopes as nested local
274 scopes, and worked fine. Check to see if we really need to
275 distinguish these in buildsym.c. */
276 struct pending **list_in_scope;
278 /* Maintain an array of referenced fundamental types for the current
279 compilation unit being read. For DWARF version 1, we have to construct
280 the fundamental types on the fly, since no information about the
281 fundamental types is supplied. Each such fundamental type is created by
282 calling a language dependent routine to create the type, and then a
283 pointer to that type is then placed in the array at the index specified
284 by it's FT_<TYPENAME> value. The array has a fixed size set by the
285 FT_NUM_MEMBERS compile time constant, which is the number of predefined
286 fundamental types gdb knows how to construct. */
287 struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
289 /* DWARF abbreviation table associated with this compilation unit. */
290 struct abbrev_info **dwarf2_abbrevs;
292 /* Storage for the abbrev table. */
293 struct obstack abbrev_obstack;
295 /* Hash table holding all the loaded partial DIEs. */
298 /* Storage for things with the same lifetime as this read-in compilation
299 unit, including partial DIEs. */
300 struct obstack comp_unit_obstack;
302 /* This flag will be set if this compilation unit includes any
303 DW_TAG_namespace DIEs. If we know that there are explicit
304 DIEs for namespaces, we don't need to try to infer them
305 from mangled names. */
306 unsigned int has_namespace_info : 1;
309 /* The line number information for a compilation unit (found in the
310 .debug_line section) begins with a "statement program header",
311 which contains the following information. */
314 unsigned int total_length;
315 unsigned short version;
316 unsigned int header_length;
317 unsigned char minimum_instruction_length;
318 unsigned char default_is_stmt;
320 unsigned char line_range;
321 unsigned char opcode_base;
323 /* standard_opcode_lengths[i] is the number of operands for the
324 standard opcode whose value is i. This means that
325 standard_opcode_lengths[0] is unused, and the last meaningful
326 element is standard_opcode_lengths[opcode_base - 1]. */
327 unsigned char *standard_opcode_lengths;
329 /* The include_directories table. NOTE! These strings are not
330 allocated with xmalloc; instead, they are pointers into
331 debug_line_buffer. If you try to free them, `free' will get
333 unsigned int num_include_dirs, include_dirs_size;
336 /* The file_names table. NOTE! These strings are not allocated
337 with xmalloc; instead, they are pointers into debug_line_buffer.
338 Don't try to free them directly. */
339 unsigned int num_file_names, file_names_size;
343 unsigned int dir_index;
344 unsigned int mod_time;
346 int included_p; /* Non-zero if referenced by the Line Number Program. */
349 /* The start and end of the statement program following this
350 header. These point into dwarf2_per_objfile->line_buffer. */
351 char *statement_program_start, *statement_program_end;
354 /* When we construct a partial symbol table entry we only
355 need this much information. */
356 struct partial_die_info
358 /* Offset of this DIE. */
361 /* DWARF-2 tag for this DIE. */
362 ENUM_BITFIELD(dwarf_tag) tag : 16;
364 /* Language code associated with this DIE. This is only used
365 for the compilation unit DIE. */
366 unsigned int language : 8;
368 /* Assorted flags describing the data found in this DIE. */
369 unsigned int has_children : 1;
370 unsigned int is_external : 1;
371 unsigned int is_declaration : 1;
372 unsigned int has_type : 1;
373 unsigned int has_specification : 1;
374 unsigned int has_stmt_list : 1;
375 unsigned int has_pc_info : 1;
377 /* Flag set if the SCOPE field of this structure has been
379 unsigned int scope_set : 1;
381 /* The name of this DIE. Normally the value of DW_AT_name, but
382 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
387 /* The scope to prepend to our children. This is generally
388 allocated on the comp_unit_obstack, so will disappear
389 when this compilation unit leaves the cache. */
392 /* The location description associated with this DIE, if any. */
393 struct dwarf_block *locdesc;
395 /* If HAS_PC_INFO, the PC range associated with this DIE. */
399 /* Pointer into the info_buffer pointing at the target of
400 DW_AT_sibling, if any. */
403 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
404 DW_AT_specification (or DW_AT_abstract_origin or
406 unsigned int spec_offset;
408 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
409 unsigned int line_offset;
411 /* Pointers to this DIE's parent, first child, and next sibling,
413 struct partial_die_info *die_parent, *die_child, *die_sibling;
416 /* This data structure holds the information of an abbrev. */
419 unsigned int number; /* number identifying abbrev */
420 enum dwarf_tag tag; /* dwarf tag */
421 unsigned short has_children; /* boolean */
422 unsigned short num_attrs; /* number of attributes */
423 struct attr_abbrev *attrs; /* an array of attribute descriptions */
424 struct abbrev_info *next; /* next in chain */
429 enum dwarf_attribute name;
430 enum dwarf_form form;
433 /* This data structure holds a complete die structure. */
436 enum dwarf_tag tag; /* Tag indicating type of die */
437 unsigned int abbrev; /* Abbrev number */
438 unsigned int offset; /* Offset in .debug_info section */
439 unsigned int num_attrs; /* Number of attributes */
440 struct attribute *attrs; /* An array of attributes */
441 struct die_info *next_ref; /* Next die in ref hash table */
443 /* The dies in a compilation unit form an n-ary tree. PARENT
444 points to this die's parent; CHILD points to the first child of
445 this node; and all the children of a given node are chained
446 together via their SIBLING fields, terminated by a die whose
448 struct die_info *child; /* Its first child, if any. */
449 struct die_info *sibling; /* Its next sibling, if any. */
450 struct die_info *parent; /* Its parent, if any. */
452 struct type *type; /* Cached type information */
455 /* Attributes have a name and a value */
458 enum dwarf_attribute name;
459 enum dwarf_form form;
463 struct dwarf_block *blk;
471 struct function_range
474 CORE_ADDR lowpc, highpc;
476 struct function_range *next;
479 /* Get at parts of an attribute structure */
481 #define DW_STRING(attr) ((attr)->u.str)
482 #define DW_UNSND(attr) ((attr)->u.unsnd)
483 #define DW_BLOCK(attr) ((attr)->u.blk)
484 #define DW_SND(attr) ((attr)->u.snd)
485 #define DW_ADDR(attr) ((attr)->u.addr)
487 /* Blocks are a bunch of untyped bytes. */
494 #ifndef ATTR_ALLOC_CHUNK
495 #define ATTR_ALLOC_CHUNK 4
498 /* A hash table of die offsets for following references. */
499 #ifndef REF_HASH_SIZE
500 #define REF_HASH_SIZE 1021
503 static struct die_info *die_ref_table[REF_HASH_SIZE];
505 /* Allocate fields for structs, unions and enums in this size. */
506 #ifndef DW_FIELD_ALLOC_CHUNK
507 #define DW_FIELD_ALLOC_CHUNK 4
510 /* A zeroed version of a partial die for initialization purposes. */
511 static struct partial_die_info zeroed_partial_die;
513 /* FIXME: decode_locdesc sets these variables to describe the location
514 to the caller. These ought to be a structure or something. If
515 none of the flags are set, the object lives at the address returned
516 by decode_locdesc. */
518 static int isreg; /* Object lives in register.
519 decode_locdesc's return value is
520 the register number. */
522 /* We put a pointer to this structure in the read_symtab_private field
527 /* Offset in .debug_info for this compilation unit. */
529 unsigned long dwarf_info_offset;
532 #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
533 #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
535 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
536 but this would require a corresponding change in unpack_field_as_long
538 static int bits_per_byte = 8;
540 /* The routines that read and process dies for a C struct or C++ class
541 pass lists of data member fields and lists of member function fields
542 in an instance of a field_info structure, as defined below. */
545 /* List of data member and baseclasses fields. */
548 struct nextfield *next;
555 /* Number of fields. */
558 /* Number of baseclasses. */
561 /* Set if the accesibility of one of the fields is not public. */
562 int non_public_fields;
564 /* Member function fields array, entries are allocated in the order they
565 are encountered in the object file. */
568 struct nextfnfield *next;
569 struct fn_field fnfield;
573 /* Member function fieldlist array, contains name of possibly overloaded
574 member function, number of overloaded member functions and a pointer
575 to the head of the member function field chain. */
580 struct nextfnfield *head;
584 /* Number of entries in the fnfieldlists array. */
588 /* Various complaints about symbol reading that don't abort the process */
591 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
593 complaint (&symfile_complaints,
594 "statement list doesn't fit in .debug_line section");
598 dwarf2_complex_location_expr_complaint (void)
600 complaint (&symfile_complaints, "location expression too complex");
604 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
607 complaint (&symfile_complaints,
608 "const value length mismatch for '%s', got %d, expected %d", arg1,
613 dwarf2_macros_too_long_complaint (void)
615 complaint (&symfile_complaints,
616 "macro info runs off end of `.debug_macinfo' section");
620 dwarf2_macro_malformed_definition_complaint (const char *arg1)
622 complaint (&symfile_complaints,
623 "macro debug info contains a malformed macro definition:\n`%s'",
628 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
630 complaint (&symfile_complaints,
631 "invalid attribute class or form for '%s' in '%s'", arg1, arg2);
634 /* local function prototypes */
636 static void dwarf2_locate_sections (bfd *, asection *, void *);
639 static void dwarf2_build_psymtabs_easy (struct objfile *, int);
642 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
645 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
646 struct partial_die_info *,
647 struct partial_symtab *);
649 static void dwarf2_build_psymtabs_hard (struct objfile *, int);
651 static void scan_partial_symbols (struct partial_die_info *,
652 CORE_ADDR *, CORE_ADDR *,
655 static void add_partial_symbol (struct partial_die_info *,
658 static int pdi_needs_namespace (enum dwarf_tag tag);
660 static void add_partial_namespace (struct partial_die_info *pdi,
661 CORE_ADDR *lowpc, CORE_ADDR *highpc,
662 struct dwarf2_cu *cu);
664 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
665 struct dwarf2_cu *cu);
667 static char *locate_pdi_sibling (struct partial_die_info *orig_pdi,
670 struct dwarf2_cu *cu);
672 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
674 static void psymtab_to_symtab_1 (struct partial_symtab *);
676 char *dwarf2_read_section (struct objfile *, asection *);
678 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
680 static void dwarf2_free_abbrev_table (void *);
682 static struct abbrev_info *peek_die_abbrev (char *, int *, struct dwarf2_cu *);
684 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
687 static struct partial_die_info *load_partial_dies (bfd *, char *, int,
690 static char *read_partial_die (struct partial_die_info *,
691 struct abbrev_info *abbrev, unsigned int,
692 bfd *, char *, struct dwarf2_cu *);
694 static struct partial_die_info *find_partial_die (unsigned long,
696 struct dwarf2_cu **);
698 static void fixup_partial_die (struct partial_die_info *,
701 static char *read_full_die (struct die_info **, bfd *, char *,
702 struct dwarf2_cu *, int *);
704 static char *read_attribute (struct attribute *, struct attr_abbrev *,
705 bfd *, char *, struct dwarf2_cu *);
707 static char *read_attribute_value (struct attribute *, unsigned,
708 bfd *, char *, struct dwarf2_cu *);
710 static unsigned int read_1_byte (bfd *, char *);
712 static int read_1_signed_byte (bfd *, char *);
714 static unsigned int read_2_bytes (bfd *, char *);
716 static unsigned int read_4_bytes (bfd *, char *);
718 static unsigned long read_8_bytes (bfd *, char *);
720 static CORE_ADDR read_address (bfd *, char *ptr, struct dwarf2_cu *,
723 static LONGEST read_initial_length (bfd *, char *,
724 struct comp_unit_head *, int *bytes_read);
726 static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *,
729 static char *read_n_bytes (bfd *, char *, unsigned int);
731 static char *read_string (bfd *, char *, unsigned int *);
733 static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *,
736 static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *);
738 static long read_signed_leb128 (bfd *, char *, unsigned int *);
740 static char *skip_leb128 (bfd *, char *);
742 static void set_cu_language (unsigned int, struct dwarf2_cu *);
744 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
747 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
748 struct dwarf2_cu *cu);
750 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
752 static struct die_info *die_specification (struct die_info *die,
755 static void free_line_header (struct line_header *lh);
757 static void add_file_name (struct line_header *, char *, unsigned int,
758 unsigned int, unsigned int);
760 static struct line_header *(dwarf_decode_line_header
761 (unsigned int offset,
762 bfd *abfd, struct dwarf2_cu *cu));
764 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
765 struct dwarf2_cu *, struct partial_symtab *);
767 static void dwarf2_start_subfile (char *, char *);
769 static struct symbol *new_symbol (struct die_info *, struct type *,
772 static void dwarf2_const_value (struct attribute *, struct symbol *,
775 static void dwarf2_const_value_data (struct attribute *attr,
779 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
781 static struct type *die_containing_type (struct die_info *,
785 static struct type *type_at_offset (unsigned int, struct objfile *);
788 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
790 static void read_type_die (struct die_info *, struct dwarf2_cu *);
792 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
794 static char *typename_concat (const char *prefix, const char *suffix);
796 static void read_typedef (struct die_info *, struct dwarf2_cu *);
798 static void read_base_type (struct die_info *, struct dwarf2_cu *);
800 static void read_subrange_type (struct die_info *die, struct dwarf2_cu *cu);
802 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
804 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
806 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
808 static int dwarf2_get_pc_bounds (struct die_info *,
809 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *);
811 static void get_scope_pc_bounds (struct die_info *,
812 CORE_ADDR *, CORE_ADDR *,
815 static void dwarf2_add_field (struct field_info *, struct die_info *,
818 static void dwarf2_attach_fields_to_type (struct field_info *,
819 struct type *, struct dwarf2_cu *);
821 static void dwarf2_add_member_fn (struct field_info *,
822 struct die_info *, struct type *,
825 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
826 struct type *, struct dwarf2_cu *);
828 static void read_structure_type (struct die_info *, struct dwarf2_cu *);
830 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
832 static char *determine_class_name (struct die_info *die, struct dwarf2_cu *cu);
834 static void read_common_block (struct die_info *, struct dwarf2_cu *);
836 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
838 static const char *namespace_name (struct die_info *die,
839 int *is_anonymous, struct dwarf2_cu *);
841 static void read_enumeration_type (struct die_info *, struct dwarf2_cu *);
843 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
845 static struct type *dwarf_base_type (int, int, struct dwarf2_cu *);
847 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
849 static void read_array_type (struct die_info *, struct dwarf2_cu *);
851 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
854 static void read_tag_pointer_type (struct die_info *, struct dwarf2_cu *);
856 static void read_tag_ptr_to_member_type (struct die_info *,
859 static void read_tag_reference_type (struct die_info *, struct dwarf2_cu *);
861 static void read_tag_const_type (struct die_info *, struct dwarf2_cu *);
863 static void read_tag_volatile_type (struct die_info *, struct dwarf2_cu *);
865 static void read_tag_string_type (struct die_info *, struct dwarf2_cu *);
867 static void read_subroutine_type (struct die_info *, struct dwarf2_cu *);
869 static struct die_info *read_comp_unit (char *, bfd *, struct dwarf2_cu *);
871 static struct die_info *read_die_and_children (char *info_ptr, bfd *abfd,
874 struct die_info *parent);
876 static struct die_info *read_die_and_siblings (char *info_ptr, bfd *abfd,
879 struct die_info *parent);
881 static void free_die_list (struct die_info *);
883 static struct cleanup *make_cleanup_free_die_list (struct die_info *);
885 static void process_die (struct die_info *, struct dwarf2_cu *);
887 static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
889 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
891 static struct die_info *dwarf2_extension (struct die_info *die,
894 static char *dwarf_tag_name (unsigned int);
896 static char *dwarf_attr_name (unsigned int);
898 static char *dwarf_form_name (unsigned int);
900 static char *dwarf_stack_op_name (unsigned int);
902 static char *dwarf_bool_name (unsigned int);
904 static char *dwarf_type_encoding_name (unsigned int);
907 static char *dwarf_cfi_name (unsigned int);
909 struct die_info *copy_die (struct die_info *);
912 static struct die_info *sibling_die (struct die_info *);
914 static void dump_die (struct die_info *);
916 static void dump_die_list (struct die_info *);
918 static void store_in_ref_table (unsigned int, struct die_info *);
920 static void dwarf2_empty_hash_tables (void);
922 static unsigned int dwarf2_get_ref_die_offset (struct attribute *,
925 static int dwarf2_get_attr_constant_value (struct attribute *, int);
927 static struct die_info *follow_die_ref (unsigned int);
929 static struct type *dwarf2_fundamental_type (struct objfile *, int,
932 /* memory allocation interface */
934 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
936 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
938 static struct die_info *dwarf_alloc_die (void);
940 static void initialize_cu_func_list (struct dwarf2_cu *);
942 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
945 static void dwarf_decode_macros (struct line_header *, unsigned int,
946 char *, bfd *, struct dwarf2_cu *);
948 static int attr_form_is_block (struct attribute *);
951 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
952 struct dwarf2_cu *cu);
954 static char *skip_one_die (char *info_ptr, struct abbrev_info *abbrev,
955 struct dwarf2_cu *cu);
957 static void free_stack_comp_unit (void *);
959 static void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
961 static void dummy_obstack_deallocate (void *object, void *data);
963 static hashval_t partial_die_hash (const void *item);
965 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
967 /* Try to locate the sections we need for DWARF 2 debugging
968 information and return true if we have enough to do something. */
971 dwarf2_has_info (struct objfile *objfile)
973 struct dwarf2_per_objfile *data;
975 /* Initialize per-objfile state. */
976 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
977 memset (data, 0, sizeof (*data));
978 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
979 dwarf2_per_objfile = data;
981 dwarf_info_section = 0;
982 dwarf_abbrev_section = 0;
983 dwarf_line_section = 0;
984 dwarf_str_section = 0;
985 dwarf_macinfo_section = 0;
986 dwarf_frame_section = 0;
987 dwarf_eh_frame_section = 0;
988 dwarf_ranges_section = 0;
989 dwarf_loc_section = 0;
991 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
992 return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
995 /* This function is mapped across the sections and remembers the
996 offset and size of each of the debugging sections we are interested
1000 dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, void *ignore_ptr)
1002 if (strcmp (sectp->name, INFO_SECTION) == 0)
1004 dwarf2_per_objfile->info_size = bfd_get_section_size (sectp);
1005 dwarf_info_section = sectp;
1007 else if (strcmp (sectp->name, ABBREV_SECTION) == 0)
1009 dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp);
1010 dwarf_abbrev_section = sectp;
1012 else if (strcmp (sectp->name, LINE_SECTION) == 0)
1014 dwarf2_per_objfile->line_size = bfd_get_section_size (sectp);
1015 dwarf_line_section = sectp;
1017 else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0)
1019 dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp);
1020 dwarf_pubnames_section = sectp;
1022 else if (strcmp (sectp->name, ARANGES_SECTION) == 0)
1024 dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp);
1025 dwarf_aranges_section = sectp;
1027 else if (strcmp (sectp->name, LOC_SECTION) == 0)
1029 dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp);
1030 dwarf_loc_section = sectp;
1032 else if (strcmp (sectp->name, MACINFO_SECTION) == 0)
1034 dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp);
1035 dwarf_macinfo_section = sectp;
1037 else if (strcmp (sectp->name, STR_SECTION) == 0)
1039 dwarf2_per_objfile->str_size = bfd_get_section_size (sectp);
1040 dwarf_str_section = sectp;
1042 else if (strcmp (sectp->name, FRAME_SECTION) == 0)
1044 dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp);
1045 dwarf_frame_section = sectp;
1047 else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0)
1049 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1050 if (aflag & SEC_HAS_CONTENTS)
1052 dwarf2_per_objfile->eh_frame_size = bfd_get_section_size (sectp);
1053 dwarf_eh_frame_section = sectp;
1056 else if (strcmp (sectp->name, RANGES_SECTION) == 0)
1058 dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp);
1059 dwarf_ranges_section = sectp;
1063 /* Build a partial symbol table. */
1066 dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
1068 /* We definitely need the .debug_info and .debug_abbrev sections */
1070 dwarf2_per_objfile->info_buffer = dwarf2_read_section (objfile, dwarf_info_section);
1071 dwarf2_per_objfile->abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section);
1073 if (dwarf_line_section)
1074 dwarf2_per_objfile->line_buffer = dwarf2_read_section (objfile, dwarf_line_section);
1076 dwarf2_per_objfile->line_buffer = NULL;
1078 if (dwarf_str_section)
1079 dwarf2_per_objfile->str_buffer = dwarf2_read_section (objfile, dwarf_str_section);
1081 dwarf2_per_objfile->str_buffer = NULL;
1083 if (dwarf_macinfo_section)
1084 dwarf2_per_objfile->macinfo_buffer = dwarf2_read_section (objfile,
1085 dwarf_macinfo_section);
1087 dwarf2_per_objfile->macinfo_buffer = NULL;
1089 if (dwarf_ranges_section)
1090 dwarf2_per_objfile->ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section);
1092 dwarf2_per_objfile->ranges_buffer = NULL;
1094 if (dwarf_loc_section)
1095 dwarf2_per_objfile->loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section);
1097 dwarf2_per_objfile->loc_buffer = NULL;
1100 || (objfile->global_psymbols.size == 0
1101 && objfile->static_psymbols.size == 0))
1103 init_psymbol_list (objfile, 1024);
1107 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1109 /* Things are significantly easier if we have .debug_aranges and
1110 .debug_pubnames sections */
1112 dwarf2_build_psymtabs_easy (objfile, mainline);
1116 /* only test this case for now */
1118 /* In this case we have to work a bit harder */
1119 dwarf2_build_psymtabs_hard (objfile, mainline);
1124 /* Build the partial symbol table from the information in the
1125 .debug_pubnames and .debug_aranges sections. */
1128 dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
1130 bfd *abfd = objfile->obfd;
1131 char *aranges_buffer, *pubnames_buffer;
1132 char *aranges_ptr, *pubnames_ptr;
1133 unsigned int entry_length, version, info_offset, info_size;
1135 pubnames_buffer = dwarf2_read_section (objfile,
1136 dwarf_pubnames_section);
1137 pubnames_ptr = pubnames_buffer;
1138 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size)
1140 struct comp_unit_head cu_header;
1143 entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
1145 pubnames_ptr += bytes_read;
1146 version = read_1_byte (abfd, pubnames_ptr);
1148 info_offset = read_4_bytes (abfd, pubnames_ptr);
1150 info_size = read_4_bytes (abfd, pubnames_ptr);
1154 aranges_buffer = dwarf2_read_section (objfile,
1155 dwarf_aranges_section);
1160 /* Read in the comp unit header information from the debug_info at
1164 read_comp_unit_head (struct comp_unit_head *cu_header,
1165 char *info_ptr, bfd *abfd)
1169 cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
1171 info_ptr += bytes_read;
1172 cu_header->version = read_2_bytes (abfd, info_ptr);
1174 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1176 info_ptr += bytes_read;
1177 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1179 signed_addr = bfd_get_sign_extend_vma (abfd);
1180 if (signed_addr < 0)
1181 internal_error (__FILE__, __LINE__,
1182 "read_comp_unit_head: dwarf from non elf file");
1183 cu_header->signed_addr_p = signed_addr;
1188 partial_read_comp_unit_head (struct comp_unit_head *header, char *info_ptr,
1191 char *beg_of_comp_unit = info_ptr;
1193 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1195 if (header->version != 2)
1196 error ("Dwarf Error: wrong version in compilation unit header "
1197 "(is %d, should be %d) [in module %s]", header->version,
1198 2, bfd_get_filename (abfd));
1200 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev_size)
1201 error ("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1202 "(offset 0x%lx + 6) [in module %s]",
1203 (long) header->abbrev_offset,
1204 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1205 bfd_get_filename (abfd));
1207 if (beg_of_comp_unit + header->length + header->initial_length_size
1208 > dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
1209 error ("Dwarf Error: bad length (0x%lx) in compilation unit header "
1210 "(offset 0x%lx + 0) [in module %s]",
1211 (long) header->length,
1212 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1213 bfd_get_filename (abfd));
1218 /* Allocate a new partial symtab for file named NAME and mark this new
1219 partial symtab as being an include of PST. */
1222 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1223 struct objfile *objfile)
1225 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1227 subpst->section_offsets = pst->section_offsets;
1228 subpst->textlow = 0;
1229 subpst->texthigh = 0;
1231 subpst->dependencies = (struct partial_symtab **)
1232 obstack_alloc (&objfile->objfile_obstack,
1233 sizeof (struct partial_symtab *));
1234 subpst->dependencies[0] = pst;
1235 subpst->number_of_dependencies = 1;
1237 subpst->globals_offset = 0;
1238 subpst->n_global_syms = 0;
1239 subpst->statics_offset = 0;
1240 subpst->n_static_syms = 0;
1241 subpst->symtab = NULL;
1242 subpst->read_symtab = pst->read_symtab;
1245 /* No private part is necessary for include psymtabs. This property
1246 can be used to differentiate between such include psymtabs and
1247 the regular ones. If it ever happens that a regular psymtab can
1248 legitimally have a NULL private part, then we'll have to add a
1249 dedicated field for that in the dwarf2_pinfo structure. */
1250 subpst->read_symtab_private = NULL;
1253 /* Read the Line Number Program data and extract the list of files
1254 included by the source file represented by PST. Build an include
1255 partial symtab for each of these included files.
1257 This procedure assumes that there *is* a Line Number Program in
1258 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1259 before calling this procedure. */
1262 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1263 struct partial_die_info *pdi,
1264 struct partial_symtab *pst)
1266 struct objfile *objfile = cu->objfile;
1267 bfd *abfd = objfile->obfd;
1268 struct line_header *lh;
1270 lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu);
1272 return; /* No linetable, so no includes. */
1274 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1276 free_line_header (lh);
1280 /* Build the partial symbol table by doing a quick pass through the
1281 .debug_info and .debug_abbrev sections. */
1284 dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
1286 /* Instead of reading this into a big buffer, we should probably use
1287 mmap() on architectures that support it. (FIXME) */
1288 bfd *abfd = objfile->obfd;
1290 char *beg_of_comp_unit;
1291 struct partial_die_info comp_unit_die;
1292 struct partial_symtab *pst;
1293 CORE_ADDR lowpc, highpc, baseaddr;
1295 info_ptr = dwarf2_per_objfile->info_buffer;
1297 /* Since the objects we're extracting from .debug_info vary in
1298 length, only the individual functions to extract them (like
1299 read_comp_unit_head and load_partial_die) can really know whether
1300 the buffer is large enough to hold another complete object.
1302 At the moment, they don't actually check that. If .debug_info
1303 holds just one extra byte after the last compilation unit's dies,
1304 then read_comp_unit_head will happily read off the end of the
1305 buffer. read_partial_die is similarly casual. Those functions
1308 For this loop condition, simply checking whether there's any data
1309 left at all should be sufficient. */
1310 while (info_ptr < (dwarf2_per_objfile->info_buffer
1311 + dwarf2_per_objfile->info_size))
1313 struct cleanup *back_to_inner;
1314 struct dwarf2_cu cu;
1315 struct abbrev_info *abbrev;
1316 unsigned int bytes_read;
1317 struct dwarf2_per_cu_data *this_cu;
1319 beg_of_comp_unit = info_ptr;
1321 memset (&cu, 0, sizeof (cu));
1323 obstack_init (&cu.comp_unit_obstack);
1325 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1327 cu.objfile = objfile;
1328 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd);
1330 /* Complete the cu_header */
1331 cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1332 cu.header.first_die_ptr = info_ptr;
1333 cu.header.cu_head_ptr = beg_of_comp_unit;
1335 cu.list_in_scope = &file_symbols;
1337 cu.partial_dies = NULL;
1339 /* Read the abbrevs for this compilation unit into a table */
1340 dwarf2_read_abbrevs (abfd, &cu);
1341 make_cleanup (dwarf2_free_abbrev_table, &cu);
1343 /* Read the compilation unit die */
1344 abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu);
1345 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
1346 abfd, info_ptr, &cu);
1348 /* Set the language we're debugging */
1349 set_cu_language (comp_unit_die.language, &cu);
1351 /* Allocate a new partial symbol table structure */
1352 pst = start_psymtab_common (objfile, objfile->section_offsets,
1353 comp_unit_die.name ? comp_unit_die.name : "",
1354 comp_unit_die.lowpc,
1355 objfile->global_psymbols.next,
1356 objfile->static_psymbols.next);
1358 if (comp_unit_die.dirname)
1359 pst->dirname = xstrdup (comp_unit_die.dirname);
1361 pst->read_symtab_private = (char *)
1362 obstack_alloc (&objfile->objfile_obstack, sizeof (struct dwarf2_pinfo));
1363 DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1364 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1366 /* Store the function that reads in the rest of the symbol table */
1367 pst->read_symtab = dwarf2_psymtab_to_symtab;
1369 /* Check if comp unit has_children.
1370 If so, read the rest of the partial symbols from this comp unit.
1371 If not, there's no more debug_info for this comp unit. */
1372 if (comp_unit_die.has_children)
1374 struct partial_die_info *first_die;
1376 lowpc = ((CORE_ADDR) -1);
1377 highpc = ((CORE_ADDR) 0);
1379 first_die = load_partial_dies (abfd, info_ptr, 1, &cu);
1381 scan_partial_symbols (first_die, &lowpc, &highpc, &cu);
1383 /* If we didn't find a lowpc, set it to highpc to avoid
1384 complaints from `maint check'. */
1385 if (lowpc == ((CORE_ADDR) -1))
1388 /* If the compilation unit didn't have an explicit address range,
1389 then use the information extracted from its child dies. */
1390 if (! comp_unit_die.has_pc_info)
1392 comp_unit_die.lowpc = lowpc;
1393 comp_unit_die.highpc = highpc;
1396 pst->textlow = comp_unit_die.lowpc + baseaddr;
1397 pst->texthigh = comp_unit_die.highpc + baseaddr;
1399 pst->n_global_syms = objfile->global_psymbols.next -
1400 (objfile->global_psymbols.list + pst->globals_offset);
1401 pst->n_static_syms = objfile->static_psymbols.next -
1402 (objfile->static_psymbols.list + pst->statics_offset);
1403 sort_pst_symbols (pst);
1405 /* If there is already a psymtab or symtab for a file of this
1406 name, remove it. (If there is a symtab, more drastic things
1407 also happen.) This happens in VxWorks. */
1408 free_named_symtabs (pst->filename);
1410 if (comp_unit_die.has_stmt_list)
1412 /* Get the list of files included in the current compilation unit,
1413 and build a psymtab for each of them. */
1414 dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst);
1417 info_ptr = beg_of_comp_unit + cu.header.length
1418 + cu.header.initial_length_size;
1420 do_cleanups (back_to_inner);
1424 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1425 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1429 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
1430 CORE_ADDR *highpc, struct dwarf2_cu *cu)
1432 struct objfile *objfile = cu->objfile;
1433 bfd *abfd = objfile->obfd;
1434 struct partial_die_info *pdi;
1436 /* Now, march along the PDI's, descending into ones which have
1437 interesting children but skipping the children of the other ones,
1438 until we reach the end of the compilation unit. */
1444 fixup_partial_die (pdi, cu);
1446 /* Anonymous namespaces have no name but have interesting
1447 children, so we need to look at them. Ditto for anonymous
1450 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
1451 || pdi->tag == DW_TAG_enumeration_type)
1455 case DW_TAG_subprogram:
1456 if (pdi->has_pc_info)
1458 if (pdi->lowpc < *lowpc)
1460 *lowpc = pdi->lowpc;
1462 if (pdi->highpc > *highpc)
1464 *highpc = pdi->highpc;
1466 if (!pdi->is_declaration)
1468 add_partial_symbol (pdi, cu);
1472 case DW_TAG_variable:
1473 case DW_TAG_typedef:
1474 case DW_TAG_union_type:
1475 if (!pdi->is_declaration)
1477 add_partial_symbol (pdi, cu);
1480 case DW_TAG_class_type:
1481 case DW_TAG_structure_type:
1482 if (!pdi->is_declaration)
1484 add_partial_symbol (pdi, cu);
1487 case DW_TAG_enumeration_type:
1488 if (!pdi->is_declaration)
1489 add_partial_enumeration (pdi, cu);
1491 case DW_TAG_base_type:
1492 case DW_TAG_subrange_type:
1493 /* File scope base type definitions are added to the partial
1495 add_partial_symbol (pdi, cu);
1497 case DW_TAG_namespace:
1498 add_partial_namespace (pdi, lowpc, highpc, cu);
1505 /* If the die has a sibling, skip to the sibling. */
1507 pdi = pdi->die_sibling;
1511 /* Functions used to compute the fully scoped name of a partial DIE.
1513 Normally, this is simple. For C++, the parent DIE's fully scoped
1514 name is concatenated with "::" and the partial DIE's name.
1515 Enumerators are an exception; they use the scope of their parent
1516 enumeration type, i.e. the name of the enumeration type is not
1517 prepended to the enumerator.
1519 There are two complexities. One is DW_AT_specification; in this
1520 case "parent" means the parent of the target of the specification,
1521 instead of the direct parent of the DIE. The other is compilers
1522 which do not emit DW_TAG_namespace; in this case we try to guess
1523 the fully qualified name of structure types from their members'
1524 linkage names. This must be done using the DIE's children rather
1525 than the children of any DW_AT_specification target. We only need
1526 to do this for structures at the top level, i.e. if the target of
1527 any DW_AT_specification (if any; otherwise the DIE itself) does not
1530 /* Compute the scope prefix associated with PDI's parent, in
1531 compilation unit CU. The result will be allocated on CU's
1532 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1533 field. NULL is returned if no prefix is necessary. */
1535 partial_die_parent_scope (struct partial_die_info *pdi,
1536 struct dwarf2_cu *cu)
1538 char *grandparent_scope;
1539 struct partial_die_info *parent, *real_pdi;
1540 struct dwarf2_cu *spec_cu;
1542 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1543 then this means the parent of the specification DIE. */
1547 while (real_pdi->has_specification)
1548 real_pdi = find_partial_die (real_pdi->spec_offset, spec_cu, &spec_cu);
1550 parent = real_pdi->die_parent;
1554 if (parent->scope_set)
1555 return parent->scope;
1557 fixup_partial_die (parent, cu);
1559 grandparent_scope = partial_die_parent_scope (parent, spec_cu);
1561 if (parent->tag == DW_TAG_namespace
1562 || parent->tag == DW_TAG_structure_type
1563 || parent->tag == DW_TAG_class_type
1564 || parent->tag == DW_TAG_union_type)
1566 if (grandparent_scope == NULL)
1567 parent->scope = parent->name;
1569 parent->scope = obconcat (&cu->comp_unit_obstack, grandparent_scope,
1570 "::", parent->name);
1572 else if (parent->tag == DW_TAG_enumeration_type)
1573 /* Enumerators should not get the name of the enumeration as a prefix. */
1574 parent->scope = grandparent_scope;
1577 /* FIXME drow/2004-04-01: What should we be doing with
1578 function-local names? For partial symbols, we should probably be
1580 complaint (&symfile_complaints,
1581 "unhandled containing DIE tag %d for DIE at %d",
1582 parent->tag, pdi->offset);
1583 parent->scope = grandparent_scope;
1586 parent->scope_set = 1;
1587 return parent->scope;
1590 /* Return the fully scoped name associated with PDI, from compilation unit
1591 CU. The result will be allocated with malloc. */
1593 partial_die_full_name (struct partial_die_info *pdi,
1594 struct dwarf2_cu *cu)
1598 parent_scope = partial_die_parent_scope (pdi, cu);
1599 if (parent_scope == NULL)
1602 return concat (parent_scope, "::", pdi->name, NULL);
1606 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
1608 struct objfile *objfile = cu->objfile;
1611 const char *my_prefix;
1612 const struct partial_symbol *psym = NULL;
1614 int built_actual_name = 0;
1616 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1620 if (pdi_needs_namespace (pdi->tag))
1622 actual_name = partial_die_full_name (pdi, cu);
1624 built_actual_name = 1;
1627 if (actual_name == NULL)
1628 actual_name = pdi->name;
1632 case DW_TAG_subprogram:
1633 if (pdi->is_external)
1635 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1636 mst_text, objfile); */
1637 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1638 VAR_DOMAIN, LOC_BLOCK,
1639 &objfile->global_psymbols,
1640 0, pdi->lowpc + baseaddr,
1641 cu->language, objfile);
1645 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1646 mst_file_text, objfile); */
1647 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1648 VAR_DOMAIN, LOC_BLOCK,
1649 &objfile->static_psymbols,
1650 0, pdi->lowpc + baseaddr,
1651 cu->language, objfile);
1654 case DW_TAG_variable:
1655 if (pdi->is_external)
1658 Don't enter into the minimal symbol tables as there is
1659 a minimal symbol table entry from the ELF symbols already.
1660 Enter into partial symbol table if it has a location
1661 descriptor or a type.
1662 If the location descriptor is missing, new_symbol will create
1663 a LOC_UNRESOLVED symbol, the address of the variable will then
1664 be determined from the minimal symbol table whenever the variable
1666 The address for the partial symbol table entry is not
1667 used by GDB, but it comes in handy for debugging partial symbol
1671 addr = decode_locdesc (pdi->locdesc, cu);
1672 if (pdi->locdesc || pdi->has_type)
1673 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1674 VAR_DOMAIN, LOC_STATIC,
1675 &objfile->global_psymbols,
1677 cu->language, objfile);
1681 /* Static Variable. Skip symbols without location descriptors. */
1682 if (pdi->locdesc == NULL)
1684 addr = decode_locdesc (pdi->locdesc, cu);
1685 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1686 mst_file_data, objfile); */
1687 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1688 VAR_DOMAIN, LOC_STATIC,
1689 &objfile->static_psymbols,
1691 cu->language, objfile);
1694 case DW_TAG_typedef:
1695 case DW_TAG_base_type:
1696 case DW_TAG_subrange_type:
1697 add_psymbol_to_list (actual_name, strlen (actual_name),
1698 VAR_DOMAIN, LOC_TYPEDEF,
1699 &objfile->static_psymbols,
1700 0, (CORE_ADDR) 0, cu->language, objfile);
1702 case DW_TAG_namespace:
1703 add_psymbol_to_list (actual_name, strlen (actual_name),
1704 VAR_DOMAIN, LOC_TYPEDEF,
1705 &objfile->global_psymbols,
1706 0, (CORE_ADDR) 0, cu->language, objfile);
1708 case DW_TAG_class_type:
1709 case DW_TAG_structure_type:
1710 case DW_TAG_union_type:
1711 case DW_TAG_enumeration_type:
1712 /* Skip aggregate types without children, these are external
1714 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
1715 static vs. global. */
1716 if (pdi->has_children == 0)
1718 add_psymbol_to_list (actual_name, strlen (actual_name),
1719 STRUCT_DOMAIN, LOC_TYPEDEF,
1720 cu->language == language_cplus
1721 ? &objfile->global_psymbols
1722 : &objfile->static_psymbols,
1723 0, (CORE_ADDR) 0, cu->language, objfile);
1725 if (cu->language == language_cplus)
1727 /* For C++, these implicitly act as typedefs as well. */
1728 add_psymbol_to_list (actual_name, strlen (actual_name),
1729 VAR_DOMAIN, LOC_TYPEDEF,
1730 &objfile->global_psymbols,
1731 0, (CORE_ADDR) 0, cu->language, objfile);
1734 case DW_TAG_enumerator:
1735 add_psymbol_to_list (actual_name, strlen (actual_name),
1736 VAR_DOMAIN, LOC_CONST,
1737 cu->language == language_cplus
1738 ? &objfile->global_psymbols
1739 : &objfile->static_psymbols,
1740 0, (CORE_ADDR) 0, cu->language, objfile);
1746 /* Check to see if we should scan the name for possible namespace
1747 info. Only do this if this is C++, if we don't have namespace
1748 debugging info in the file, if the psym is of an appropriate type
1749 (otherwise we'll have psym == NULL), and if we actually had a
1750 mangled name to begin with. */
1752 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
1753 cases which do not set PSYM above? */
1755 if (cu->language == language_cplus
1756 && cu->has_namespace_info == 0
1758 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
1759 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
1762 if (built_actual_name)
1763 xfree (actual_name);
1766 /* Determine whether a die of type TAG living in a C++ class or
1767 namespace needs to have the name of the scope prepended to the
1768 name listed in the die. */
1771 pdi_needs_namespace (enum dwarf_tag tag)
1775 case DW_TAG_namespace:
1776 case DW_TAG_typedef:
1777 case DW_TAG_class_type:
1778 case DW_TAG_structure_type:
1779 case DW_TAG_union_type:
1780 case DW_TAG_enumeration_type:
1781 case DW_TAG_enumerator:
1788 /* Read a partial die corresponding to a namespace; also, add a symbol
1789 corresponding to that namespace to the symbol table. NAMESPACE is
1790 the name of the enclosing namespace. */
1793 add_partial_namespace (struct partial_die_info *pdi,
1794 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1795 struct dwarf2_cu *cu)
1797 struct objfile *objfile = cu->objfile;
1799 /* Add a symbol for the namespace. */
1801 add_partial_symbol (pdi, cu);
1803 /* Now scan partial symbols in that namespace. */
1805 if (pdi->has_children)
1806 scan_partial_symbols (pdi->die_child, lowpc, highpc, cu);
1809 /* See if we can figure out if the class lives in a namespace. We do
1810 this by looking for a member function; its demangled name will
1811 contain namespace info, if there is any. */
1814 guess_structure_name (struct partial_die_info *struct_pdi,
1815 struct dwarf2_cu *cu)
1817 if (cu->language == language_cplus
1818 && cu->has_namespace_info == 0
1819 && struct_pdi->has_children)
1821 /* NOTE: carlton/2003-10-07: Getting the info this way changes
1822 what template types look like, because the demangler
1823 frequently doesn't give the same name as the debug info. We
1824 could fix this by only using the demangled name to get the
1825 prefix (but see comment in read_structure_type). */
1827 struct partial_die_info *child_pdi = struct_pdi->die_child;
1828 struct partial_die_info *real_pdi;
1829 struct dwarf2_cu *spec_cu;
1831 /* If this DIE (this DIE's specification, if any) has a parent, then
1832 we should not do this. We'll prepend the parent's fully qualified
1833 name when we create the partial symbol. */
1835 real_pdi = struct_pdi;
1837 while (real_pdi->has_specification)
1838 real_pdi = find_partial_die (real_pdi->spec_offset, spec_cu, &spec_cu);
1840 if (real_pdi->die_parent != NULL)
1843 while (child_pdi != NULL)
1845 if (child_pdi->tag == DW_TAG_subprogram)
1847 char *actual_class_name
1848 = language_class_name_from_physname (cu->language_defn,
1850 if (actual_class_name != NULL)
1853 = obsavestring (actual_class_name,
1854 strlen (actual_class_name),
1855 &cu->comp_unit_obstack);
1856 xfree (actual_class_name);
1861 child_pdi = child_pdi->die_sibling;
1866 /* Read a partial die corresponding to an enumeration type. */
1869 add_partial_enumeration (struct partial_die_info *enum_pdi,
1870 struct dwarf2_cu *cu)
1872 struct objfile *objfile = cu->objfile;
1873 bfd *abfd = objfile->obfd;
1874 struct partial_die_info *pdi;
1876 if (enum_pdi->name != NULL)
1877 add_partial_symbol (enum_pdi, cu);
1879 pdi = enum_pdi->die_child;
1882 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
1883 complaint (&symfile_complaints, "malformed enumerator DIE ignored");
1885 add_partial_symbol (pdi, cu);
1886 pdi = pdi->die_sibling;
1890 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
1891 Return the corresponding abbrev, or NULL if the number is zero (indicating
1892 an empty DIE). In either case *BYTES_READ will be set to the length of
1893 the initial number. */
1895 static struct abbrev_info *
1896 peek_die_abbrev (char *info_ptr, int *bytes_read, struct dwarf2_cu *cu)
1898 bfd *abfd = cu->objfile->obfd;
1899 unsigned int abbrev_number;
1900 struct abbrev_info *abbrev;
1902 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
1904 if (abbrev_number == 0)
1907 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
1910 error ("Dwarf Error: Could not find abbrev number %d [in module %s]", abbrev_number,
1911 bfd_get_filename (abfd));
1917 /* Scan the debug information for CU starting at INFO_PTR. Returns a
1918 pointer to the end of a series of DIEs, terminated by an empty
1919 DIE. Any children of the skipped DIEs will also be skipped. */
1922 skip_children (char *info_ptr, struct dwarf2_cu *cu)
1924 struct abbrev_info *abbrev;
1925 unsigned int bytes_read;
1929 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
1931 return info_ptr + bytes_read;
1933 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
1937 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
1938 should point just after the initial uleb128 of a DIE, and the
1939 abbrev corresponding to that skipped uleb128 should be passed in
1940 ABBREV. Returns a pointer to this DIE's sibling, skipping any
1944 skip_one_die (char *info_ptr, struct abbrev_info *abbrev,
1945 struct dwarf2_cu *cu)
1947 unsigned int bytes_read;
1948 struct attribute attr;
1949 bfd *abfd = cu->objfile->obfd;
1950 unsigned int form, i;
1952 for (i = 0; i < abbrev->num_attrs; i++)
1954 /* The only abbrev we care about is DW_AT_sibling. */
1955 if (abbrev->attrs[i].name == DW_AT_sibling)
1957 read_attribute (&attr, &abbrev->attrs[i],
1958 abfd, info_ptr, cu);
1959 if (attr.form == DW_FORM_ref_addr)
1960 complaint (&symfile_complaints, "ignoring absolute DW_AT_sibling");
1962 return dwarf2_per_objfile->info_buffer
1963 + dwarf2_get_ref_die_offset (&attr, cu);
1966 /* If it isn't DW_AT_sibling, skip this attribute. */
1967 form = abbrev->attrs[i].form;
1972 case DW_FORM_ref_addr:
1973 info_ptr += cu->header.addr_size;
1992 case DW_FORM_string:
1993 read_string (abfd, info_ptr, &bytes_read);
1994 info_ptr += bytes_read;
1997 info_ptr += cu->header.offset_size;
2000 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2001 info_ptr += bytes_read;
2003 case DW_FORM_block1:
2004 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2006 case DW_FORM_block2:
2007 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2009 case DW_FORM_block4:
2010 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2014 case DW_FORM_ref_udata:
2015 info_ptr = skip_leb128 (abfd, info_ptr);
2017 case DW_FORM_indirect:
2018 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2019 info_ptr += bytes_read;
2020 /* We need to continue parsing from here, so just go back to
2022 goto skip_attribute;
2025 error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
2026 dwarf_form_name (form),
2027 bfd_get_filename (abfd));
2031 if (abbrev->has_children)
2032 return skip_children (info_ptr, cu);
2037 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2038 the next DIE after ORIG_PDI. */
2041 locate_pdi_sibling (struct partial_die_info *orig_pdi, char *info_ptr,
2042 bfd *abfd, struct dwarf2_cu *cu)
2044 /* Do we know the sibling already? */
2046 if (orig_pdi->sibling)
2047 return orig_pdi->sibling;
2049 /* Are there any children to deal with? */
2051 if (!orig_pdi->has_children)
2054 /* Skip the children the long way. */
2056 return skip_children (info_ptr, cu);
2059 /* Expand this partial symbol table into a full symbol table. */
2062 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2064 /* FIXME: This is barely more than a stub. */
2069 warning ("bug: psymtab for %s is already read in.", pst->filename);
2075 printf_filtered ("Reading in symbols for %s...", pst->filename);
2076 gdb_flush (gdb_stdout);
2079 psymtab_to_symtab_1 (pst);
2081 /* Finish up the debug error message. */
2083 printf_filtered ("done.\n");
2089 psymtab_to_symtab_1 (struct partial_symtab *pst)
2091 struct objfile *objfile = pst->objfile;
2092 bfd *abfd = objfile->obfd;
2093 struct dwarf2_cu cu;
2094 struct die_info *dies;
2095 unsigned long offset;
2096 CORE_ADDR lowpc, highpc;
2097 struct die_info *child_die;
2099 struct symtab *symtab;
2100 struct cleanup *back_to;
2101 struct attribute *attr;
2105 for (i = 0; i < pst->number_of_dependencies; i++)
2106 if (!pst->dependencies[i]->readin)
2108 /* Inform about additional files that need to be read in. */
2111 fputs_filtered (" ", gdb_stdout);
2113 fputs_filtered ("and ", gdb_stdout);
2115 printf_filtered ("%s...", pst->dependencies[i]->filename);
2116 wrap_here (""); /* Flush output */
2117 gdb_flush (gdb_stdout);
2119 psymtab_to_symtab_1 (pst->dependencies[i]);
2122 if (pst->read_symtab_private == NULL)
2124 /* It's an include file, no symbols to read for it.
2125 Everything is in the parent symtab. */
2130 dwarf2_per_objfile = objfile_data (pst->objfile, dwarf2_objfile_data_key);
2132 /* Set local variables from the partial symbol table info. */
2133 offset = DWARF_INFO_OFFSET (pst);
2135 info_ptr = dwarf2_per_objfile->info_buffer + offset;
2136 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2138 /* We're in the global namespace. */
2139 processing_current_prefix = "";
2141 obstack_init (&cu.comp_unit_obstack);
2142 back_to = make_cleanup (free_stack_comp_unit, &cu);
2145 make_cleanup (really_free_pendings, NULL);
2147 cu.objfile = objfile;
2149 /* read in the comp_unit header */
2150 info_ptr = read_comp_unit_head (&cu.header, info_ptr, abfd);
2152 /* Read the abbrevs for this compilation unit */
2153 dwarf2_read_abbrevs (abfd, &cu);
2154 make_cleanup (dwarf2_free_abbrev_table, &cu);
2156 cu.header.offset = offset;
2158 cu.list_in_scope = &file_symbols;
2160 dies = read_comp_unit (info_ptr, abfd, &cu);
2162 make_cleanup_free_die_list (dies);
2164 /* Find the base address of the compilation unit for range lists and
2165 location lists. It will normally be specified by DW_AT_low_pc.
2166 In DWARF-3 draft 4, the base address could be overridden by
2167 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2168 compilation units with discontinuous ranges. */
2170 cu.header.base_known = 0;
2171 cu.header.base_address = 0;
2173 attr = dwarf2_attr (dies, DW_AT_entry_pc, &cu);
2176 cu.header.base_address = DW_ADDR (attr);
2177 cu.header.base_known = 1;
2181 attr = dwarf2_attr (dies, DW_AT_low_pc, &cu);
2184 cu.header.base_address = DW_ADDR (attr);
2185 cu.header.base_known = 1;
2189 /* Do line number decoding in read_file_scope () */
2190 process_die (dies, &cu);
2192 /* Some compilers don't define a DW_AT_high_pc attribute for the
2193 compilation unit. If the DW_AT_high_pc is missing, synthesize
2194 it, by scanning the DIE's below the compilation unit. */
2195 get_scope_pc_bounds (dies, &lowpc, &highpc, &cu);
2197 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
2199 /* Set symtab language to language from DW_AT_language.
2200 If the compilation is from a C file generated by language preprocessors,
2201 do not set the language if it was already deduced by start_subfile. */
2203 && !(cu.language == language_c && symtab->language != language_c))
2205 symtab->language = cu.language;
2207 pst->symtab = symtab;
2210 do_cleanups (back_to);
2213 /* Process a die and its children. */
2216 process_die (struct die_info *die, struct dwarf2_cu *cu)
2220 case DW_TAG_padding:
2222 case DW_TAG_compile_unit:
2223 read_file_scope (die, cu);
2225 case DW_TAG_subprogram:
2226 read_subroutine_type (die, cu);
2227 read_func_scope (die, cu);
2229 case DW_TAG_inlined_subroutine:
2230 /* FIXME: These are ignored for now.
2231 They could be used to set breakpoints on all inlined instances
2232 of a function and make GDB `next' properly over inlined functions. */
2234 case DW_TAG_lexical_block:
2235 case DW_TAG_try_block:
2236 case DW_TAG_catch_block:
2237 read_lexical_block_scope (die, cu);
2239 case DW_TAG_class_type:
2240 case DW_TAG_structure_type:
2241 case DW_TAG_union_type:
2242 read_structure_type (die, cu);
2243 process_structure_scope (die, cu);
2245 case DW_TAG_enumeration_type:
2246 read_enumeration_type (die, cu);
2247 process_enumeration_scope (die, cu);
2250 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2251 a symbol or process any children. Therefore it doesn't do anything
2252 that won't be done on-demand by read_type_die. */
2253 case DW_TAG_subroutine_type:
2254 read_subroutine_type (die, cu);
2256 case DW_TAG_array_type:
2257 read_array_type (die, cu);
2259 case DW_TAG_pointer_type:
2260 read_tag_pointer_type (die, cu);
2262 case DW_TAG_ptr_to_member_type:
2263 read_tag_ptr_to_member_type (die, cu);
2265 case DW_TAG_reference_type:
2266 read_tag_reference_type (die, cu);
2268 case DW_TAG_string_type:
2269 read_tag_string_type (die, cu);
2273 case DW_TAG_base_type:
2274 read_base_type (die, cu);
2275 /* Add a typedef symbol for the type definition, if it has a
2277 new_symbol (die, die->type, cu);
2279 case DW_TAG_subrange_type:
2280 read_subrange_type (die, cu);
2281 /* Add a typedef symbol for the type definition, if it has a
2283 new_symbol (die, die->type, cu);
2285 case DW_TAG_common_block:
2286 read_common_block (die, cu);
2288 case DW_TAG_common_inclusion:
2290 case DW_TAG_namespace:
2291 processing_has_namespace_info = 1;
2292 read_namespace (die, cu);
2294 case DW_TAG_imported_declaration:
2295 case DW_TAG_imported_module:
2296 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2297 information contained in these. DW_TAG_imported_declaration
2298 dies shouldn't have children; DW_TAG_imported_module dies
2299 shouldn't in the C++ case, but conceivably could in the
2300 Fortran case, so we'll have to replace this gdb_assert if
2301 Fortran compilers start generating that info. */
2302 processing_has_namespace_info = 1;
2303 gdb_assert (die->child == NULL);
2306 new_symbol (die, NULL, cu);
2312 initialize_cu_func_list (struct dwarf2_cu *cu)
2314 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
2318 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
2320 struct objfile *objfile = cu->objfile;
2321 struct comp_unit_head *cu_header = &cu->header;
2322 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2323 CORE_ADDR lowpc = ((CORE_ADDR) -1);
2324 CORE_ADDR highpc = ((CORE_ADDR) 0);
2325 struct attribute *attr;
2326 char *name = "<unknown>";
2327 char *comp_dir = NULL;
2328 struct die_info *child_die;
2329 bfd *abfd = objfile->obfd;
2330 struct line_header *line_header = 0;
2333 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2335 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
2337 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2338 from finish_block. */
2339 if (lowpc == ((CORE_ADDR) -1))
2344 attr = dwarf2_attr (die, DW_AT_name, cu);
2347 name = DW_STRING (attr);
2349 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
2352 comp_dir = DW_STRING (attr);
2355 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2356 directory, get rid of it. */
2357 char *cp = strchr (comp_dir, ':');
2359 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
2364 attr = dwarf2_attr (die, DW_AT_language, cu);
2367 set_cu_language (DW_UNSND (attr), cu);
2370 attr = dwarf2_attr (die, DW_AT_producer, cu);
2372 cu->producer = DW_STRING (attr);
2374 /* We assume that we're processing GCC output. */
2375 processing_gcc_compilation = 2;
2377 /* FIXME:Do something here. */
2378 if (dip->at_producer != NULL)
2380 handle_producer (dip->at_producer);
2384 /* The compilation unit may be in a different language or objfile,
2385 zero out all remembered fundamental types. */
2386 memset (cu->ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
2388 start_symtab (name, comp_dir, lowpc);
2389 record_debugformat ("DWARF 2");
2391 initialize_cu_func_list (cu);
2393 /* Process all dies in compilation unit. */
2394 if (die->child != NULL)
2396 child_die = die->child;
2397 while (child_die && child_die->tag)
2399 process_die (child_die, cu);
2400 child_die = sibling_die (child_die);
2404 /* Decode line number information if present. */
2405 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2408 unsigned int line_offset = DW_UNSND (attr);
2409 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
2412 make_cleanup ((make_cleanup_ftype *) free_line_header,
2413 (void *) line_header);
2414 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
2418 /* Decode macro information, if present. Dwarf 2 macro information
2419 refers to information in the line number info statement program
2420 header, so we can only read it if we've read the header
2422 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
2423 if (attr && line_header)
2425 unsigned int macro_offset = DW_UNSND (attr);
2426 dwarf_decode_macros (line_header, macro_offset,
2427 comp_dir, abfd, cu);
2429 do_cleanups (back_to);
2433 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
2434 struct dwarf2_cu *cu)
2436 struct function_range *thisfn;
2438 thisfn = (struct function_range *)
2439 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
2440 thisfn->name = name;
2441 thisfn->lowpc = lowpc;
2442 thisfn->highpc = highpc;
2443 thisfn->seen_line = 0;
2444 thisfn->next = NULL;
2446 if (cu->last_fn == NULL)
2447 cu->first_fn = thisfn;
2449 cu->last_fn->next = thisfn;
2451 cu->last_fn = thisfn;
2455 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
2457 struct objfile *objfile = cu->objfile;
2458 struct context_stack *new;
2461 struct die_info *child_die;
2462 struct attribute *attr;
2464 const char *previous_prefix = processing_current_prefix;
2465 struct cleanup *back_to = NULL;
2468 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2470 name = dwarf2_linkage_name (die, cu);
2472 /* Ignore functions with missing or empty names and functions with
2473 missing or invalid low and high pc attributes. */
2474 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
2477 if (cu->language == language_cplus)
2479 struct die_info *spec_die = die_specification (die, cu);
2481 /* NOTE: carlton/2004-01-23: We have to be careful in the
2482 presence of DW_AT_specification. For example, with GCC 3.4,
2487 // Definition of N::foo.
2491 then we'll have a tree of DIEs like this:
2493 1: DW_TAG_compile_unit
2494 2: DW_TAG_namespace // N
2495 3: DW_TAG_subprogram // declaration of N::foo
2496 4: DW_TAG_subprogram // definition of N::foo
2497 DW_AT_specification // refers to die #3
2499 Thus, when processing die #4, we have to pretend that we're
2500 in the context of its DW_AT_specification, namely the contex
2503 if (spec_die != NULL)
2505 char *specification_prefix = determine_prefix (spec_die, cu);
2506 processing_current_prefix = specification_prefix;
2507 back_to = make_cleanup (xfree, specification_prefix);
2514 /* Record the function range for dwarf_decode_lines. */
2515 add_to_cu_func_list (name, lowpc, highpc, cu);
2517 new = push_context (0, lowpc);
2518 new->name = new_symbol (die, die->type, cu);
2520 /* If there is a location expression for DW_AT_frame_base, record
2522 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
2524 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2525 expression is being recorded directly in the function's symbol
2526 and not in a separate frame-base object. I guess this hack is
2527 to avoid adding some sort of frame-base adjunct/annex to the
2528 function's symbol :-(. The problem with doing this is that it
2529 results in a function symbol with a location expression that
2530 has nothing to do with the location of the function, ouch! The
2531 relationship should be: a function's symbol has-a frame base; a
2532 frame-base has-a location expression. */
2533 dwarf2_symbol_mark_computed (attr, new->name, cu);
2535 cu->list_in_scope = &local_symbols;
2537 if (die->child != NULL)
2539 child_die = die->child;
2540 while (child_die && child_die->tag)
2542 process_die (child_die, cu);
2543 child_die = sibling_die (child_die);
2547 new = pop_context ();
2548 /* Make a block for the local symbols within. */
2549 finish_block (new->name, &local_symbols, new->old_blocks,
2550 lowpc, highpc, objfile);
2552 /* In C++, we can have functions nested inside functions (e.g., when
2553 a function declares a class that has methods). This means that
2554 when we finish processing a function scope, we may need to go
2555 back to building a containing block's symbol lists. */
2556 local_symbols = new->locals;
2557 param_symbols = new->params;
2559 /* If we've finished processing a top-level function, subsequent
2560 symbols go in the file symbol list. */
2561 if (outermost_context_p ())
2562 cu->list_in_scope = &file_symbols;
2564 processing_current_prefix = previous_prefix;
2565 if (back_to != NULL)
2566 do_cleanups (back_to);
2569 /* Process all the DIES contained within a lexical block scope. Start
2570 a new scope, process the dies, and then close the scope. */
2573 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
2575 struct objfile *objfile = cu->objfile;
2576 struct context_stack *new;
2577 CORE_ADDR lowpc, highpc;
2578 struct die_info *child_die;
2581 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2583 /* Ignore blocks with missing or invalid low and high pc attributes. */
2584 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
2585 as multiple lexical blocks? Handling children in a sane way would
2586 be nasty. Might be easier to properly extend generic blocks to
2588 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
2593 push_context (0, lowpc);
2594 if (die->child != NULL)
2596 child_die = die->child;
2597 while (child_die && child_die->tag)
2599 process_die (child_die, cu);
2600 child_die = sibling_die (child_die);
2603 new = pop_context ();
2605 if (local_symbols != NULL)
2607 finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
2610 local_symbols = new->locals;
2613 /* Get low and high pc attributes from a die. Return 1 if the attributes
2614 are present and valid, otherwise, return 0. Return -1 if the range is
2615 discontinuous, i.e. derived from DW_AT_ranges information. */
2617 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
2618 CORE_ADDR *highpc, struct dwarf2_cu *cu)
2620 struct objfile *objfile = cu->objfile;
2621 struct comp_unit_head *cu_header = &cu->header;
2622 struct attribute *attr;
2623 bfd *obfd = objfile->obfd;
2628 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
2631 high = DW_ADDR (attr);
2632 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
2634 low = DW_ADDR (attr);
2636 /* Found high w/o low attribute. */
2639 /* Found consecutive range of addresses. */
2644 attr = dwarf2_attr (die, DW_AT_ranges, cu);
2647 unsigned int addr_size = cu_header->addr_size;
2648 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
2649 /* Value of the DW_AT_ranges attribute is the offset in the
2650 .debug_ranges section. */
2651 unsigned int offset = DW_UNSND (attr);
2652 /* Base address selection entry. */
2660 found_base = cu_header->base_known;
2661 base = cu_header->base_address;
2663 if (offset >= dwarf2_per_objfile->ranges_size)
2665 complaint (&symfile_complaints,
2666 "Offset %d out of bounds for DW_AT_ranges attribute",
2670 buffer = dwarf2_per_objfile->ranges_buffer + offset;
2672 /* Read in the largest possible address. */
2673 marker = read_address (obfd, buffer, cu, &dummy);
2674 if ((marker & mask) == mask)
2676 /* If we found the largest possible address, then
2677 read the base address. */
2678 base = read_address (obfd, buffer + addr_size, cu, &dummy);
2679 buffer += 2 * addr_size;
2680 offset += 2 * addr_size;
2688 CORE_ADDR range_beginning, range_end;
2690 range_beginning = read_address (obfd, buffer, cu, &dummy);
2691 buffer += addr_size;
2692 range_end = read_address (obfd, buffer, cu, &dummy);
2693 buffer += addr_size;
2694 offset += 2 * addr_size;
2696 /* An end of list marker is a pair of zero addresses. */
2697 if (range_beginning == 0 && range_end == 0)
2698 /* Found the end of list entry. */
2701 /* Each base address selection entry is a pair of 2 values.
2702 The first is the largest possible address, the second is
2703 the base address. Check for a base address here. */
2704 if ((range_beginning & mask) == mask)
2706 /* If we found the largest possible address, then
2707 read the base address. */
2708 base = read_address (obfd, buffer + addr_size, cu, &dummy);
2715 /* We have no valid base address for the ranges
2717 complaint (&symfile_complaints,
2718 "Invalid .debug_ranges data (no base address)");
2722 range_beginning += base;
2725 /* FIXME: This is recording everything as a low-high
2726 segment of consecutive addresses. We should have a
2727 data structure for discontiguous block ranges
2731 low = range_beginning;
2737 if (range_beginning < low)
2738 low = range_beginning;
2739 if (range_end > high)
2745 /* If the first entry is an end-of-list marker, the range
2746 describes an empty scope, i.e. no instructions. */
2756 /* When using the GNU linker, .gnu.linkonce. sections are used to
2757 eliminate duplicate copies of functions and vtables and such.
2758 The linker will arbitrarily choose one and discard the others.
2759 The AT_*_pc values for such functions refer to local labels in
2760 these sections. If the section from that file was discarded, the
2761 labels are not in the output, so the relocs get a value of 0.
2762 If this is a discarded function, mark the pc bounds as invalid,
2763 so that GDB will ignore it. */
2764 if (low == 0 && (bfd_get_file_flags (obfd) & HAS_RELOC) == 0)
2772 /* Get the low and high pc's represented by the scope DIE, and store
2773 them in *LOWPC and *HIGHPC. If the correct values can't be
2774 determined, set *LOWPC to -1 and *HIGHPC to 0. */
2777 get_scope_pc_bounds (struct die_info *die,
2778 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2779 struct dwarf2_cu *cu)
2781 CORE_ADDR best_low = (CORE_ADDR) -1;
2782 CORE_ADDR best_high = (CORE_ADDR) 0;
2783 CORE_ADDR current_low, current_high;
2785 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu))
2787 best_low = current_low;
2788 best_high = current_high;
2792 struct die_info *child = die->child;
2794 while (child && child->tag)
2796 switch (child->tag) {
2797 case DW_TAG_subprogram:
2798 if (dwarf2_get_pc_bounds (child, ¤t_low, ¤t_high, cu))
2800 best_low = min (best_low, current_low);
2801 best_high = max (best_high, current_high);
2804 case DW_TAG_namespace:
2805 /* FIXME: carlton/2004-01-16: Should we do this for
2806 DW_TAG_class_type/DW_TAG_structure_type, too? I think
2807 that current GCC's always emit the DIEs corresponding
2808 to definitions of methods of classes as children of a
2809 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
2810 the DIEs giving the declarations, which could be
2811 anywhere). But I don't see any reason why the
2812 standards says that they have to be there. */
2813 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
2815 if (current_low != ((CORE_ADDR) -1))
2817 best_low = min (best_low, current_low);
2818 best_high = max (best_high, current_high);
2826 child = sibling_die (child);
2831 *highpc = best_high;
2834 /* Add an aggregate field to the field list. */
2837 dwarf2_add_field (struct field_info *fip, struct die_info *die,
2838 struct dwarf2_cu *cu)
2840 struct objfile *objfile = cu->objfile;
2841 struct nextfield *new_field;
2842 struct attribute *attr;
2844 char *fieldname = "";
2846 /* Allocate a new field list entry and link it in. */
2847 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
2848 make_cleanup (xfree, new_field);
2849 memset (new_field, 0, sizeof (struct nextfield));
2850 new_field->next = fip->fields;
2851 fip->fields = new_field;
2854 /* Handle accessibility and virtuality of field.
2855 The default accessibility for members is public, the default
2856 accessibility for inheritance is private. */
2857 if (die->tag != DW_TAG_inheritance)
2858 new_field->accessibility = DW_ACCESS_public;
2860 new_field->accessibility = DW_ACCESS_private;
2861 new_field->virtuality = DW_VIRTUALITY_none;
2863 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
2865 new_field->accessibility = DW_UNSND (attr);
2866 if (new_field->accessibility != DW_ACCESS_public)
2867 fip->non_public_fields = 1;
2868 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
2870 new_field->virtuality = DW_UNSND (attr);
2872 fp = &new_field->field;
2874 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
2876 /* Data member other than a C++ static data member. */
2878 /* Get type of field. */
2879 fp->type = die_type (die, cu);
2881 FIELD_STATIC_KIND (*fp) = 0;
2883 /* Get bit size of field (zero if none). */
2884 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
2887 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
2891 FIELD_BITSIZE (*fp) = 0;
2894 /* Get bit offset of field. */
2895 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
2898 FIELD_BITPOS (*fp) =
2899 decode_locdesc (DW_BLOCK (attr), cu) * bits_per_byte;
2902 FIELD_BITPOS (*fp) = 0;
2903 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
2906 if (BITS_BIG_ENDIAN)
2908 /* For big endian bits, the DW_AT_bit_offset gives the
2909 additional bit offset from the MSB of the containing
2910 anonymous object to the MSB of the field. We don't
2911 have to do anything special since we don't need to
2912 know the size of the anonymous object. */
2913 FIELD_BITPOS (*fp) += DW_UNSND (attr);
2917 /* For little endian bits, compute the bit offset to the
2918 MSB of the anonymous object, subtract off the number of
2919 bits from the MSB of the field to the MSB of the
2920 object, and then subtract off the number of bits of
2921 the field itself. The result is the bit offset of
2922 the LSB of the field. */
2924 int bit_offset = DW_UNSND (attr);
2926 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
2929 /* The size of the anonymous object containing
2930 the bit field is explicit, so use the
2931 indicated size (in bytes). */
2932 anonymous_size = DW_UNSND (attr);
2936 /* The size of the anonymous object containing
2937 the bit field must be inferred from the type
2938 attribute of the data member containing the
2940 anonymous_size = TYPE_LENGTH (fp->type);
2942 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
2943 - bit_offset - FIELD_BITSIZE (*fp);
2947 /* Get name of field. */
2948 attr = dwarf2_attr (die, DW_AT_name, cu);
2949 if (attr && DW_STRING (attr))
2950 fieldname = DW_STRING (attr);
2952 /* The name is already allocated along with this objfile, so we don't
2953 need to duplicate it for the type. */
2954 fp->name = fieldname;
2956 /* Change accessibility for artificial fields (e.g. virtual table
2957 pointer or virtual base class pointer) to private. */
2958 if (dwarf2_attr (die, DW_AT_artificial, cu))
2960 new_field->accessibility = DW_ACCESS_private;
2961 fip->non_public_fields = 1;
2964 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
2966 /* C++ static member. */
2968 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
2969 is a declaration, but all versions of G++ as of this writing
2970 (so through at least 3.2.1) incorrectly generate
2971 DW_TAG_variable tags. */
2975 /* Get name of field. */
2976 attr = dwarf2_attr (die, DW_AT_name, cu);
2977 if (attr && DW_STRING (attr))
2978 fieldname = DW_STRING (attr);
2982 /* Get physical name. */
2983 physname = dwarf2_linkage_name (die, cu);
2985 /* The name is already allocated along with this objfile, so we don't
2986 need to duplicate it for the type. */
2987 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
2988 FIELD_TYPE (*fp) = die_type (die, cu);
2989 FIELD_NAME (*fp) = fieldname;
2991 else if (die->tag == DW_TAG_inheritance)
2993 /* C++ base class field. */
2994 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
2996 FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu)
2998 FIELD_BITSIZE (*fp) = 0;
2999 FIELD_STATIC_KIND (*fp) = 0;
3000 FIELD_TYPE (*fp) = die_type (die, cu);
3001 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
3002 fip->nbaseclasses++;
3006 /* Create the vector of fields, and attach it to the type. */
3009 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
3010 struct dwarf2_cu *cu)
3012 int nfields = fip->nfields;
3014 /* Record the field count, allocate space for the array of fields,
3015 and create blank accessibility bitfields if necessary. */
3016 TYPE_NFIELDS (type) = nfields;
3017 TYPE_FIELDS (type) = (struct field *)
3018 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3019 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3021 if (fip->non_public_fields)
3023 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3025 TYPE_FIELD_PRIVATE_BITS (type) =
3026 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3027 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3029 TYPE_FIELD_PROTECTED_BITS (type) =
3030 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3031 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3033 TYPE_FIELD_IGNORE_BITS (type) =
3034 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3035 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3038 /* If the type has baseclasses, allocate and clear a bit vector for
3039 TYPE_FIELD_VIRTUAL_BITS. */
3040 if (fip->nbaseclasses)
3042 int num_bytes = B_BYTES (fip->nbaseclasses);
3045 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3046 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3047 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3048 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
3049 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
3052 /* Copy the saved-up fields into the field vector. Start from the head
3053 of the list, adding to the tail of the field array, so that they end
3054 up in the same order in the array in which they were added to the list. */
3055 while (nfields-- > 0)
3057 TYPE_FIELD (type, nfields) = fip->fields->field;
3058 switch (fip->fields->accessibility)
3060 case DW_ACCESS_private:
3061 SET_TYPE_FIELD_PRIVATE (type, nfields);
3064 case DW_ACCESS_protected:
3065 SET_TYPE_FIELD_PROTECTED (type, nfields);
3068 case DW_ACCESS_public:
3072 /* Unknown accessibility. Complain and treat it as public. */
3074 complaint (&symfile_complaints, "unsupported accessibility %d",
3075 fip->fields->accessibility);
3079 if (nfields < fip->nbaseclasses)
3081 switch (fip->fields->virtuality)
3083 case DW_VIRTUALITY_virtual:
3084 case DW_VIRTUALITY_pure_virtual:
3085 SET_TYPE_FIELD_VIRTUAL (type, nfields);
3089 fip->fields = fip->fields->next;
3093 /* Add a member function to the proper fieldlist. */
3096 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
3097 struct type *type, struct dwarf2_cu *cu)
3099 struct objfile *objfile = cu->objfile;
3100 struct attribute *attr;
3101 struct fnfieldlist *flp;
3103 struct fn_field *fnp;
3106 struct nextfnfield *new_fnfield;
3108 /* Get name of member function. */
3109 attr = dwarf2_attr (die, DW_AT_name, cu);
3110 if (attr && DW_STRING (attr))
3111 fieldname = DW_STRING (attr);
3115 /* Get the mangled name. */
3116 physname = dwarf2_linkage_name (die, cu);
3118 /* Look up member function name in fieldlist. */
3119 for (i = 0; i < fip->nfnfields; i++)
3121 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
3125 /* Create new list element if necessary. */
3126 if (i < fip->nfnfields)
3127 flp = &fip->fnfieldlists[i];
3130 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
3132 fip->fnfieldlists = (struct fnfieldlist *)
3133 xrealloc (fip->fnfieldlists,
3134 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
3135 * sizeof (struct fnfieldlist));
3136 if (fip->nfnfields == 0)
3137 make_cleanup (free_current_contents, &fip->fnfieldlists);
3139 flp = &fip->fnfieldlists[fip->nfnfields];
3140 flp->name = fieldname;
3146 /* Create a new member function field and chain it to the field list
3148 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
3149 make_cleanup (xfree, new_fnfield);
3150 memset (new_fnfield, 0, sizeof (struct nextfnfield));
3151 new_fnfield->next = flp->head;
3152 flp->head = new_fnfield;
3155 /* Fill in the member function field info. */
3156 fnp = &new_fnfield->fnfield;
3157 /* The name is already allocated along with this objfile, so we don't
3158 need to duplicate it for the type. */
3159 fnp->physname = physname ? physname : "";
3160 fnp->type = alloc_type (objfile);
3161 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
3163 int nparams = TYPE_NFIELDS (die->type);
3165 /* TYPE is the domain of this method, and DIE->TYPE is the type
3166 of the method itself (TYPE_CODE_METHOD). */
3167 smash_to_method_type (fnp->type, type,
3168 TYPE_TARGET_TYPE (die->type),
3169 TYPE_FIELDS (die->type),
3170 TYPE_NFIELDS (die->type),
3171 TYPE_VARARGS (die->type));
3173 /* Handle static member functions.
3174 Dwarf2 has no clean way to discern C++ static and non-static
3175 member functions. G++ helps GDB by marking the first
3176 parameter for non-static member functions (which is the
3177 this pointer) as artificial. We obtain this information
3178 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3179 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
3180 fnp->voffset = VOFFSET_STATIC;
3183 complaint (&symfile_complaints, "member function type missing for '%s'",
3186 /* Get fcontext from DW_AT_containing_type if present. */
3187 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
3188 fnp->fcontext = die_containing_type (die, cu);
3190 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3191 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3193 /* Get accessibility. */
3194 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
3197 switch (DW_UNSND (attr))
3199 case DW_ACCESS_private:
3200 fnp->is_private = 1;
3202 case DW_ACCESS_protected:
3203 fnp->is_protected = 1;
3208 /* Check for artificial methods. */
3209 attr = dwarf2_attr (die, DW_AT_artificial, cu);
3210 if (attr && DW_UNSND (attr) != 0)
3211 fnp->is_artificial = 1;
3213 /* Get index in virtual function table if it is a virtual member function. */
3214 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
3217 /* Support the .debug_loc offsets */
3218 if (attr_form_is_block (attr))
3220 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
3222 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
3224 dwarf2_complex_location_expr_complaint ();
3228 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3234 /* Create the vector of member function fields, and attach it to the type. */
3237 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
3238 struct dwarf2_cu *cu)
3240 struct fnfieldlist *flp;
3241 int total_length = 0;
3244 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3245 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
3246 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
3248 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
3250 struct nextfnfield *nfp = flp->head;
3251 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
3254 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
3255 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
3256 fn_flp->fn_fields = (struct fn_field *)
3257 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
3258 for (k = flp->length; (k--, nfp); nfp = nfp->next)
3259 fn_flp->fn_fields[k] = nfp->fnfield;
3261 total_length += flp->length;
3264 TYPE_NFN_FIELDS (type) = fip->nfnfields;
3265 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
3268 /* Called when we find the DIE that starts a structure or union scope
3269 (definition) to process all dies that define the members of the
3272 NOTE: we need to call struct_type regardless of whether or not the
3273 DIE has an at_name attribute, since it might be an anonymous
3274 structure or union. This gets the type entered into our set of
3277 However, if the structure is incomplete (an opaque struct/union)
3278 then suppress creating a symbol table entry for it since gdb only
3279 wants to find the one with the complete definition. Note that if
3280 it is complete, we just call new_symbol, which does it's own
3281 checking about whether the struct/union is anonymous or not (and
3282 suppresses creating a symbol table entry itself). */
3285 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
3287 struct objfile *objfile = cu->objfile;
3289 struct attribute *attr;
3290 const char *previous_prefix = processing_current_prefix;
3291 struct cleanup *back_to = NULL;
3296 type = alloc_type (objfile);
3298 INIT_CPLUS_SPECIFIC (type);
3299 attr = dwarf2_attr (die, DW_AT_name, cu);
3300 if (attr && DW_STRING (attr))
3302 if (cu->language == language_cplus)
3304 char *new_prefix = determine_class_name (die, cu);
3305 TYPE_TAG_NAME (type) = obsavestring (new_prefix,
3306 strlen (new_prefix),
3307 &objfile->objfile_obstack);
3308 back_to = make_cleanup (xfree, new_prefix);
3309 processing_current_prefix = new_prefix;
3313 /* The name is already allocated along with this objfile, so
3314 we don't need to duplicate it for the type. */
3315 TYPE_TAG_NAME (type) = DW_STRING (attr);
3319 if (die->tag == DW_TAG_structure_type)
3321 TYPE_CODE (type) = TYPE_CODE_STRUCT;
3323 else if (die->tag == DW_TAG_union_type)
3325 TYPE_CODE (type) = TYPE_CODE_UNION;
3329 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
3331 TYPE_CODE (type) = TYPE_CODE_CLASS;
3334 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
3337 TYPE_LENGTH (type) = DW_UNSND (attr);
3341 TYPE_LENGTH (type) = 0;
3344 if (die_is_declaration (die, cu))
3345 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
3347 /* We need to add the type field to the die immediately so we don't
3348 infinitely recurse when dealing with pointers to the structure
3349 type within the structure itself. */
3352 if (die->child != NULL && ! die_is_declaration (die, cu))
3354 struct field_info fi;
3355 struct die_info *child_die;
3356 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
3358 memset (&fi, 0, sizeof (struct field_info));
3360 child_die = die->child;
3362 while (child_die && child_die->tag)
3364 if (child_die->tag == DW_TAG_member
3365 || child_die->tag == DW_TAG_variable)
3367 /* NOTE: carlton/2002-11-05: A C++ static data member
3368 should be a DW_TAG_member that is a declaration, but
3369 all versions of G++ as of this writing (so through at
3370 least 3.2.1) incorrectly generate DW_TAG_variable
3371 tags for them instead. */
3372 dwarf2_add_field (&fi, child_die, cu);
3374 else if (child_die->tag == DW_TAG_subprogram)
3376 /* C++ member function. */
3377 read_type_die (child_die, cu);
3378 dwarf2_add_member_fn (&fi, child_die, type, cu);
3380 else if (child_die->tag == DW_TAG_inheritance)
3382 /* C++ base class field. */
3383 dwarf2_add_field (&fi, child_die, cu);
3385 child_die = sibling_die (child_die);
3388 /* Attach fields and member functions to the type. */
3390 dwarf2_attach_fields_to_type (&fi, type, cu);
3393 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
3395 /* Get the type which refers to the base class (possibly this
3396 class itself) which contains the vtable pointer for the current
3397 class from the DW_AT_containing_type attribute. */
3399 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
3401 struct type *t = die_containing_type (die, cu);
3403 TYPE_VPTR_BASETYPE (type) = t;
3406 static const char vptr_name[] =
3407 {'_', 'v', 'p', 't', 'r', '\0'};
3410 /* Our own class provides vtbl ptr. */
3411 for (i = TYPE_NFIELDS (t) - 1;
3412 i >= TYPE_N_BASECLASSES (t);
3415 char *fieldname = TYPE_FIELD_NAME (t, i);
3417 if ((strncmp (fieldname, vptr_name,
3418 strlen (vptr_name) - 1)
3420 && is_cplus_marker (fieldname[strlen (vptr_name)]))
3422 TYPE_VPTR_FIELDNO (type) = i;
3427 /* Complain if virtual function table field not found. */
3428 if (i < TYPE_N_BASECLASSES (t))
3429 complaint (&symfile_complaints,
3430 "virtual function table pointer not found when defining class '%s'",
3431 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
3436 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
3441 do_cleanups (back_to);
3444 processing_current_prefix = previous_prefix;
3445 if (back_to != NULL)
3446 do_cleanups (back_to);
3450 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
3452 struct objfile *objfile = cu->objfile;
3453 const char *previous_prefix = processing_current_prefix;
3454 struct die_info *child_die = die->child;
3456 if (TYPE_TAG_NAME (die->type) != NULL)
3457 processing_current_prefix = TYPE_TAG_NAME (die->type);
3459 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
3460 snapshots) has been known to create a die giving a declaration
3461 for a class that has, as a child, a die giving a definition for a
3462 nested class. So we have to process our children even if the
3463 current die is a declaration. Normally, of course, a declaration
3464 won't have any children at all. */
3466 while (child_die != NULL && child_die->tag)
3468 if (child_die->tag == DW_TAG_member
3469 || child_die->tag == DW_TAG_variable
3470 || child_die->tag == DW_TAG_inheritance)
3475 process_die (child_die, cu);
3477 child_die = sibling_die (child_die);
3480 if (die->child != NULL && ! die_is_declaration (die, cu))
3481 new_symbol (die, die->type, cu);
3483 processing_current_prefix = previous_prefix;
3486 /* Given a DW_AT_enumeration_type die, set its type. We do not
3487 complete the type's fields yet, or create any symbols. */
3490 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
3492 struct objfile *objfile = cu->objfile;
3494 struct attribute *attr;
3499 type = alloc_type (objfile);
3501 TYPE_CODE (type) = TYPE_CODE_ENUM;
3502 attr = dwarf2_attr (die, DW_AT_name, cu);
3503 if (attr && DW_STRING (attr))
3505 char *name = DW_STRING (attr);
3507 if (processing_has_namespace_info)
3509 TYPE_TAG_NAME (type) = obconcat (&objfile->objfile_obstack,
3510 processing_current_prefix,
3511 processing_current_prefix[0] == '\0'
3517 /* The name is already allocated along with this objfile, so
3518 we don't need to duplicate it for the type. */
3519 TYPE_TAG_NAME (type) = name;
3523 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
3526 TYPE_LENGTH (type) = DW_UNSND (attr);
3530 TYPE_LENGTH (type) = 0;
3536 /* Determine the name of the type represented by DIE, which should be
3537 a named C++ compound type. Return the name in question; the caller
3538 is responsible for xfree()'ing it. */
3541 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
3543 struct cleanup *back_to = NULL;
3544 struct die_info *spec_die = die_specification (die, cu);
3545 char *new_prefix = NULL;
3547 /* If this is the definition of a class that is declared by another
3548 die, then processing_current_prefix may not be accurate; see
3549 read_func_scope for a similar example. */
3550 if (spec_die != NULL)
3552 char *specification_prefix = determine_prefix (spec_die, cu);
3553 processing_current_prefix = specification_prefix;
3554 back_to = make_cleanup (xfree, specification_prefix);
3557 /* If we don't have namespace debug info, guess the name by trying
3558 to demangle the names of members, just like we did in
3559 guess_structure_name. */
3560 if (!processing_has_namespace_info)
3562 struct die_info *child;
3564 for (child = die->child;
3565 child != NULL && child->tag != 0;
3566 child = sibling_die (child))
3568 if (child->tag == DW_TAG_subprogram)
3571 = language_class_name_from_physname (cu->language_defn,
3575 if (new_prefix != NULL)
3581 if (new_prefix == NULL)
3583 const char *name = dwarf2_name (die, cu);
3584 new_prefix = typename_concat (processing_current_prefix,
3585 name ? name : "<<anonymous>>");
3588 if (back_to != NULL)
3589 do_cleanups (back_to);
3594 /* Given a pointer to a die which begins an enumeration, process all
3595 the dies that define the members of the enumeration, and create the
3596 symbol for the enumeration type.
3598 NOTE: We reverse the order of the element list. */
3601 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
3603 struct objfile *objfile = cu->objfile;
3604 struct die_info *child_die;
3605 struct field *fields;
3606 struct attribute *attr;
3609 int unsigned_enum = 1;
3613 if (die->child != NULL)
3615 child_die = die->child;
3616 while (child_die && child_die->tag)
3618 if (child_die->tag != DW_TAG_enumerator)
3620 process_die (child_die, cu);
3624 attr = dwarf2_attr (child_die, DW_AT_name, cu);
3627 sym = new_symbol (child_die, die->type, cu);
3628 if (SYMBOL_VALUE (sym) < 0)
3631 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
3633 fields = (struct field *)
3635 (num_fields + DW_FIELD_ALLOC_CHUNK)
3636 * sizeof (struct field));
3639 FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
3640 FIELD_TYPE (fields[num_fields]) = NULL;
3641 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
3642 FIELD_BITSIZE (fields[num_fields]) = 0;
3643 FIELD_STATIC_KIND (fields[num_fields]) = 0;
3649 child_die = sibling_die (child_die);
3654 TYPE_NFIELDS (die->type) = num_fields;
3655 TYPE_FIELDS (die->type) = (struct field *)
3656 TYPE_ALLOC (die->type, sizeof (struct field) * num_fields);
3657 memcpy (TYPE_FIELDS (die->type), fields,
3658 sizeof (struct field) * num_fields);
3662 TYPE_FLAGS (die->type) |= TYPE_FLAG_UNSIGNED;
3665 new_symbol (die, die->type, cu);
3668 /* Extract all information from a DW_TAG_array_type DIE and put it in
3669 the DIE's type field. For now, this only handles one dimensional
3673 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
3675 struct objfile *objfile = cu->objfile;
3676 struct die_info *child_die;
3677 struct type *type = NULL;
3678 struct type *element_type, *range_type, *index_type;
3679 struct type **range_types = NULL;
3680 struct attribute *attr;
3682 struct cleanup *back_to;
3684 /* Return if we've already decoded this type. */
3690 element_type = die_type (die, cu);
3692 /* Irix 6.2 native cc creates array types without children for
3693 arrays with unspecified length. */
3694 if (die->child == NULL)
3696 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
3697 range_type = create_range_type (NULL, index_type, 0, -1);
3698 die->type = create_array_type (NULL, element_type, range_type);
3702 back_to = make_cleanup (null_cleanup, NULL);
3703 child_die = die->child;
3704 while (child_die && child_die->tag)
3706 if (child_die->tag == DW_TAG_subrange_type)
3708 read_subrange_type (child_die, cu);
3710 if (child_die->type != NULL)
3712 /* The range type was succesfully read. Save it for
3713 the array type creation. */
3714 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
3716 range_types = (struct type **)
3717 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
3718 * sizeof (struct type *));
3720 make_cleanup (free_current_contents, &range_types);
3722 range_types[ndim++] = child_die->type;
3725 child_die = sibling_die (child_die);
3728 /* Dwarf2 dimensions are output from left to right, create the
3729 necessary array types in backwards order. */
3731 type = element_type;
3733 if (read_array_order (die, cu) == DW_ORD_col_major)
3737 type = create_array_type (NULL, type, range_types[i++]);
3742 type = create_array_type (NULL, type, range_types[ndim]);
3745 /* Understand Dwarf2 support for vector types (like they occur on
3746 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
3747 array type. This is not part of the Dwarf2/3 standard yet, but a
3748 custom vendor extension. The main difference between a regular
3749 array and the vector variant is that vectors are passed by value
3751 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
3753 TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
3755 do_cleanups (back_to);
3757 /* Install the type in the die. */
3761 static enum dwarf_array_dim_ordering
3762 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
3764 struct attribute *attr;
3766 attr = dwarf2_attr (die, DW_AT_ordering, cu);
3768 if (attr) return DW_SND (attr);
3771 GNU F77 is a special case, as at 08/2004 array type info is the
3772 opposite order to the dwarf2 specification, but data is still
3773 laid out as per normal fortran.
3775 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
3779 if (cu->language == language_fortran &&
3780 cu->producer && strstr (cu->producer, "GNU F77"))
3782 return DW_ORD_row_major;
3785 switch (cu->language_defn->la_array_ordering)
3787 case array_column_major:
3788 return DW_ORD_col_major;
3789 case array_row_major:
3791 return DW_ORD_row_major;
3796 /* First cut: install each common block member as a global variable. */
3799 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
3801 struct die_info *child_die;
3802 struct attribute *attr;
3804 CORE_ADDR base = (CORE_ADDR) 0;
3806 attr = dwarf2_attr (die, DW_AT_location, cu);
3809 /* Support the .debug_loc offsets */
3810 if (attr_form_is_block (attr))
3812 base = decode_locdesc (DW_BLOCK (attr), cu);
3814 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
3816 dwarf2_complex_location_expr_complaint ();
3820 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
3821 "common block member");
3824 if (die->child != NULL)
3826 child_die = die->child;
3827 while (child_die && child_die->tag)
3829 sym = new_symbol (child_die, NULL, cu);
3830 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
3833 SYMBOL_VALUE_ADDRESS (sym) =
3834 base + decode_locdesc (DW_BLOCK (attr), cu);
3835 add_symbol_to_list (sym, &global_symbols);
3837 child_die = sibling_die (child_die);
3842 /* Read a C++ namespace. */
3845 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
3847 struct objfile *objfile = cu->objfile;
3848 const char *previous_prefix = processing_current_prefix;
3851 struct die_info *current_die;
3853 name = namespace_name (die, &is_anonymous, cu);
3855 /* Now build the name of the current namespace. */
3857 if (previous_prefix[0] == '\0')
3859 processing_current_prefix = name;
3863 /* We need temp_name around because processing_current_prefix
3864 is a const char *. */
3865 char *temp_name = alloca (strlen (previous_prefix)
3866 + 2 + strlen(name) + 1);
3867 strcpy (temp_name, previous_prefix);
3868 strcat (temp_name, "::");
3869 strcat (temp_name, name);
3871 processing_current_prefix = temp_name;
3874 /* Add a symbol associated to this if we haven't seen the namespace
3875 before. Also, add a using directive if it's an anonymous
3878 if (dwarf2_extension (die, cu) == NULL)
3882 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
3883 this cast will hopefully become unnecessary. */
3884 type = init_type (TYPE_CODE_NAMESPACE, 0, 0,
3885 (char *) processing_current_prefix,
3887 TYPE_TAG_NAME (type) = TYPE_NAME (type);
3889 new_symbol (die, type, cu);
3893 cp_add_using_directive (processing_current_prefix,
3894 strlen (previous_prefix),
3895 strlen (processing_current_prefix));
3898 if (die->child != NULL)
3900 struct die_info *child_die = die->child;
3902 while (child_die && child_die->tag)
3904 process_die (child_die, cu);
3905 child_die = sibling_die (child_die);
3909 processing_current_prefix = previous_prefix;
3912 /* Return the name of the namespace represented by DIE. Set
3913 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
3917 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
3919 struct die_info *current_die;
3920 const char *name = NULL;
3922 /* Loop through the extensions until we find a name. */
3924 for (current_die = die;
3925 current_die != NULL;
3926 current_die = dwarf2_extension (die, cu))
3928 name = dwarf2_name (current_die, cu);
3933 /* Is it an anonymous namespace? */
3935 *is_anonymous = (name == NULL);
3937 name = "(anonymous namespace)";
3942 /* Extract all information from a DW_TAG_pointer_type DIE and add to
3943 the user defined type vector. */
3946 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
3948 struct comp_unit_head *cu_header = &cu->header;
3950 struct attribute *attr_byte_size;
3951 struct attribute *attr_address_class;
3952 int byte_size, addr_class;
3959 type = lookup_pointer_type (die_type (die, cu));
3961 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
3963 byte_size = DW_UNSND (attr_byte_size);
3965 byte_size = cu_header->addr_size;
3967 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
3968 if (attr_address_class)
3969 addr_class = DW_UNSND (attr_address_class);
3971 addr_class = DW_ADDR_none;
3973 /* If the pointer size or address class is different than the
3974 default, create a type variant marked as such and set the
3975 length accordingly. */
3976 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
3978 if (ADDRESS_CLASS_TYPE_FLAGS_P ())
3982 type_flags = ADDRESS_CLASS_TYPE_FLAGS (byte_size, addr_class);
3983 gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0);
3984 type = make_type_with_address_space (type, type_flags);
3986 else if (TYPE_LENGTH (type) != byte_size)
3988 complaint (&symfile_complaints, "invalid pointer size %d", byte_size);
3991 /* Should we also complain about unhandled address classes? */
3995 TYPE_LENGTH (type) = byte_size;
3999 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4000 the user defined type vector. */
4003 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
4005 struct objfile *objfile = cu->objfile;
4007 struct type *to_type;
4008 struct type *domain;
4015 type = alloc_type (objfile);
4016 to_type = die_type (die, cu);
4017 domain = die_containing_type (die, cu);
4018 smash_to_member_type (type, domain, to_type);
4023 /* Extract all information from a DW_TAG_reference_type DIE and add to
4024 the user defined type vector. */
4027 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
4029 struct comp_unit_head *cu_header = &cu->header;
4031 struct attribute *attr;
4038 type = lookup_reference_type (die_type (die, cu));
4039 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4042 TYPE_LENGTH (type) = DW_UNSND (attr);
4046 TYPE_LENGTH (type) = cu_header->addr_size;
4052 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
4054 struct type *base_type;
4061 base_type = die_type (die, cu);
4062 die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
4066 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
4068 struct type *base_type;
4075 base_type = die_type (die, cu);
4076 die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
4079 /* Extract all information from a DW_TAG_string_type DIE and add to
4080 the user defined type vector. It isn't really a user defined type,
4081 but it behaves like one, with other DIE's using an AT_user_def_type
4082 attribute to reference it. */
4085 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
4087 struct objfile *objfile = cu->objfile;
4088 struct type *type, *range_type, *index_type, *char_type;
4089 struct attribute *attr;
4090 unsigned int length;
4097 attr = dwarf2_attr (die, DW_AT_string_length, cu);
4100 length = DW_UNSND (attr);
4104 /* check for the DW_AT_byte_size attribute */
4105 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4108 length = DW_UNSND (attr);
4115 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
4116 range_type = create_range_type (NULL, index_type, 1, length);
4117 if (cu->language == language_fortran)
4119 /* Need to create a unique string type for bounds
4121 type = create_string_type (0, range_type);
4125 char_type = dwarf2_fundamental_type (objfile, FT_CHAR, cu);
4126 type = create_string_type (char_type, range_type);
4131 /* Handle DIES due to C code like:
4135 int (*funcp)(int a, long l);
4139 ('funcp' generates a DW_TAG_subroutine_type DIE)
4143 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
4145 struct type *type; /* Type that this function returns */
4146 struct type *ftype; /* Function that returns above type */
4147 struct attribute *attr;
4149 /* Decode the type that this subroutine returns */
4154 type = die_type (die, cu);
4155 ftype = lookup_function_type (type);
4157 /* All functions in C++ have prototypes. */
4158 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
4159 if ((attr && (DW_UNSND (attr) != 0))
4160 || cu->language == language_cplus)
4161 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
4163 if (die->child != NULL)
4165 struct die_info *child_die;
4169 /* Count the number of parameters.
4170 FIXME: GDB currently ignores vararg functions, but knows about
4171 vararg member functions. */
4172 child_die = die->child;
4173 while (child_die && child_die->tag)
4175 if (child_die->tag == DW_TAG_formal_parameter)
4177 else if (child_die->tag == DW_TAG_unspecified_parameters)
4178 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
4179 child_die = sibling_die (child_die);
4182 /* Allocate storage for parameters and fill them in. */
4183 TYPE_NFIELDS (ftype) = nparams;
4184 TYPE_FIELDS (ftype) = (struct field *)
4185 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
4187 child_die = die->child;
4188 while (child_die && child_die->tag)
4190 if (child_die->tag == DW_TAG_formal_parameter)
4192 /* Dwarf2 has no clean way to discern C++ static and non-static
4193 member functions. G++ helps GDB by marking the first
4194 parameter for non-static member functions (which is the
4195 this pointer) as artificial. We pass this information
4196 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4197 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
4199 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
4201 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
4202 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
4205 child_die = sibling_die (child_die);
4213 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
4215 struct objfile *objfile = cu->objfile;
4216 struct attribute *attr;
4221 attr = dwarf2_attr (die, DW_AT_name, cu);
4222 if (attr && DW_STRING (attr))
4224 name = DW_STRING (attr);
4226 die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile);
4227 TYPE_TARGET_TYPE (die->type) = die_type (die, cu);
4231 /* Find a representation of a given base type and install
4232 it in the TYPE field of the die. */
4235 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
4237 struct objfile *objfile = cu->objfile;
4239 struct attribute *attr;
4240 int encoding = 0, size = 0;
4242 /* If we've already decoded this die, this is a no-op. */
4248 attr = dwarf2_attr (die, DW_AT_encoding, cu);
4251 encoding = DW_UNSND (attr);
4253 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4256 size = DW_UNSND (attr);
4258 attr = dwarf2_attr (die, DW_AT_name, cu);
4259 if (attr && DW_STRING (attr))
4261 enum type_code code = TYPE_CODE_INT;
4266 case DW_ATE_address:
4267 /* Turn DW_ATE_address into a void * pointer. */
4268 code = TYPE_CODE_PTR;
4269 type_flags |= TYPE_FLAG_UNSIGNED;
4271 case DW_ATE_boolean:
4272 code = TYPE_CODE_BOOL;
4273 type_flags |= TYPE_FLAG_UNSIGNED;
4275 case DW_ATE_complex_float:
4276 code = TYPE_CODE_COMPLEX;
4279 code = TYPE_CODE_FLT;
4282 case DW_ATE_signed_char:
4284 case DW_ATE_unsigned:
4285 case DW_ATE_unsigned_char:
4286 type_flags |= TYPE_FLAG_UNSIGNED;
4289 complaint (&symfile_complaints, "unsupported DW_AT_encoding: '%s'",
4290 dwarf_type_encoding_name (encoding));
4293 type = init_type (code, size, type_flags, DW_STRING (attr), objfile);
4294 if (encoding == DW_ATE_address)
4295 TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID,
4297 else if (encoding == DW_ATE_complex_float)
4300 TYPE_TARGET_TYPE (type)
4301 = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT, cu);
4302 else if (size == 16)
4303 TYPE_TARGET_TYPE (type)
4304 = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
4306 TYPE_TARGET_TYPE (type)
4307 = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
4312 type = dwarf_base_type (encoding, size, cu);
4317 /* Read the given DW_AT_subrange DIE. */
4320 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
4322 struct type *base_type;
4323 struct type *range_type;
4324 struct attribute *attr;
4328 /* If we have already decoded this die, then nothing more to do. */
4332 base_type = die_type (die, cu);
4333 if (base_type == NULL)
4335 complaint (&symfile_complaints,
4336 "DW_AT_type missing from DW_TAG_subrange_type");
4340 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
4341 base_type = alloc_type (NULL);
4343 if (cu->language == language_fortran)
4345 /* FORTRAN implies a lower bound of 1, if not given. */
4349 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
4351 low = dwarf2_get_attr_constant_value (attr, 0);
4353 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
4356 if (attr->form == DW_FORM_block1)
4358 /* GCC encodes arrays with unspecified or dynamic length
4359 with a DW_FORM_block1 attribute.
4360 FIXME: GDB does not yet know how to handle dynamic
4361 arrays properly, treat them as arrays with unspecified
4364 FIXME: jimb/2003-09-22: GDB does not really know
4365 how to handle arrays of unspecified length
4366 either; we just represent them as zero-length
4367 arrays. Choose an appropriate upper bound given
4368 the lower bound we've computed above. */
4372 high = dwarf2_get_attr_constant_value (attr, 1);
4375 range_type = create_range_type (NULL, base_type, low, high);
4377 attr = dwarf2_attr (die, DW_AT_name, cu);
4378 if (attr && DW_STRING (attr))
4379 TYPE_NAME (range_type) = DW_STRING (attr);
4381 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4383 TYPE_LENGTH (range_type) = DW_UNSND (attr);
4385 die->type = range_type;
4389 /* Read a whole compilation unit into a linked list of dies. */
4391 static struct die_info *
4392 read_comp_unit (char *info_ptr, bfd *abfd, struct dwarf2_cu *cu)
4394 /* Reset die reference table; we are
4395 building new ones now. */
4396 dwarf2_empty_hash_tables ();
4398 return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL);
4401 /* Read a single die and all its descendents. Set the die's sibling
4402 field to NULL; set other fields in the die correctly, and set all
4403 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
4404 location of the info_ptr after reading all of those dies. PARENT
4405 is the parent of the die in question. */
4407 static struct die_info *
4408 read_die_and_children (char *info_ptr, bfd *abfd,
4409 struct dwarf2_cu *cu,
4410 char **new_info_ptr,
4411 struct die_info *parent)
4413 struct die_info *die;
4417 cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children);
4418 store_in_ref_table (die->offset, die);
4422 die->child = read_die_and_siblings (cur_ptr, abfd, cu,
4428 *new_info_ptr = cur_ptr;
4431 die->sibling = NULL;
4432 die->parent = parent;
4436 /* Read a die, all of its descendents, and all of its siblings; set
4437 all of the fields of all of the dies correctly. Arguments are as
4438 in read_die_and_children. */
4440 static struct die_info *
4441 read_die_and_siblings (char *info_ptr, bfd *abfd,
4442 struct dwarf2_cu *cu,
4443 char **new_info_ptr,
4444 struct die_info *parent)
4446 struct die_info *first_die, *last_sibling;
4450 first_die = last_sibling = NULL;
4454 struct die_info *die
4455 = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent);
4463 last_sibling->sibling = die;
4468 *new_info_ptr = cur_ptr;
4478 /* Free a linked list of dies. */
4481 free_die_list (struct die_info *dies)
4483 struct die_info *die, *next;
4488 if (die->child != NULL)
4489 free_die_list (die->child);
4490 next = die->sibling;
4498 do_free_die_list_cleanup (void *dies)
4500 free_die_list (dies);
4503 static struct cleanup *
4504 make_cleanup_free_die_list (struct die_info *dies)
4506 return make_cleanup (do_free_die_list_cleanup, dies);
4510 /* Read the contents of the section at OFFSET and of size SIZE from the
4511 object file specified by OBJFILE into the objfile_obstack and return it. */
4514 dwarf2_read_section (struct objfile *objfile, asection *sectp)
4516 bfd *abfd = objfile->obfd;
4518 bfd_size_type size = bfd_get_section_size (sectp);
4523 buf = (char *) obstack_alloc (&objfile->objfile_obstack, size);
4525 = (char *) symfile_relocate_debug_section (abfd, sectp, (bfd_byte *) buf);
4529 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
4530 || bfd_bread (buf, size, abfd) != size)
4531 error ("Dwarf Error: Can't read DWARF data from '%s'",
4532 bfd_get_filename (abfd));
4537 /* In DWARF version 2, the description of the debugging information is
4538 stored in a separate .debug_abbrev section. Before we read any
4539 dies from a section we read in all abbreviations and install them
4540 in a hash table. This function also sets flags in CU describing
4541 the data found in the abbrev table. */
4544 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
4546 struct comp_unit_head *cu_header = &cu->header;
4548 struct abbrev_info *cur_abbrev;
4549 unsigned int abbrev_number, bytes_read, abbrev_name;
4550 unsigned int abbrev_form, hash_number;
4551 struct attr_abbrev *cur_attrs;
4552 unsigned int allocated_attrs;
4554 /* Initialize dwarf2 abbrevs */
4555 obstack_init (&cu->abbrev_obstack);
4556 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
4558 * sizeof (struct abbrev_info *)));
4559 memset (cu->dwarf2_abbrevs, 0,
4560 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
4562 abbrev_ptr = dwarf2_per_objfile->abbrev_buffer + cu_header->abbrev_offset;
4563 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
4564 abbrev_ptr += bytes_read;
4566 allocated_attrs = ATTR_ALLOC_CHUNK;
4567 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
4569 /* loop until we reach an abbrev number of 0 */
4570 while (abbrev_number)
4572 cur_abbrev = dwarf_alloc_abbrev (cu);
4574 /* read in abbrev header */
4575 cur_abbrev->number = abbrev_number;
4576 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
4577 abbrev_ptr += bytes_read;
4578 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
4581 if (cur_abbrev->tag == DW_TAG_namespace)
4582 cu->has_namespace_info = 1;
4584 /* now read in declarations */
4585 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
4586 abbrev_ptr += bytes_read;
4587 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
4588 abbrev_ptr += bytes_read;
4591 if (cur_abbrev->num_attrs == allocated_attrs)
4593 allocated_attrs += ATTR_ALLOC_CHUNK;
4595 = xrealloc (cur_attrs, (allocated_attrs
4596 * sizeof (struct attr_abbrev)));
4598 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
4599 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
4600 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
4601 abbrev_ptr += bytes_read;
4602 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
4603 abbrev_ptr += bytes_read;
4606 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
4607 (cur_abbrev->num_attrs
4608 * sizeof (struct attr_abbrev)));
4609 memcpy (cur_abbrev->attrs, cur_attrs,
4610 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
4612 hash_number = abbrev_number % ABBREV_HASH_SIZE;
4613 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
4614 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
4616 /* Get next abbreviation.
4617 Under Irix6 the abbreviations for a compilation unit are not
4618 always properly terminated with an abbrev number of 0.
4619 Exit loop if we encounter an abbreviation which we have
4620 already read (which means we are about to read the abbreviations
4621 for the next compile unit) or if the end of the abbreviation
4622 table is reached. */
4623 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev_buffer)
4624 >= dwarf2_per_objfile->abbrev_size)
4626 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
4627 abbrev_ptr += bytes_read;
4628 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
4635 /* Release the memory used by the abbrev table for a compilation unit. */
4638 dwarf2_free_abbrev_table (void *ptr_to_cu)
4640 struct dwarf2_cu *cu = ptr_to_cu;
4642 obstack_free (&cu->abbrev_obstack, NULL);
4643 cu->dwarf2_abbrevs = NULL;
4646 /* Lookup an abbrev_info structure in the abbrev hash table. */
4648 static struct abbrev_info *
4649 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
4651 unsigned int hash_number;
4652 struct abbrev_info *abbrev;
4654 hash_number = number % ABBREV_HASH_SIZE;
4655 abbrev = cu->dwarf2_abbrevs[hash_number];
4659 if (abbrev->number == number)
4662 abbrev = abbrev->next;
4667 /* Returns nonzero if TAG represents a type that we might generate a partial
4671 is_type_tag_for_partial (int tag)
4676 /* Some types that would be reasonable to generate partial symbols for,
4677 that we don't at present. */
4678 case DW_TAG_array_type:
4679 case DW_TAG_file_type:
4680 case DW_TAG_ptr_to_member_type:
4681 case DW_TAG_set_type:
4682 case DW_TAG_string_type:
4683 case DW_TAG_subroutine_type:
4685 case DW_TAG_base_type:
4686 case DW_TAG_class_type:
4687 case DW_TAG_enumeration_type:
4688 case DW_TAG_structure_type:
4689 case DW_TAG_subrange_type:
4690 case DW_TAG_typedef:
4691 case DW_TAG_union_type:
4698 /* Load all DIEs that are interesting for partial symbols into memory. */
4700 static struct partial_die_info *
4701 load_partial_dies (bfd *abfd, char *info_ptr, int building_psymtab,
4702 struct dwarf2_cu *cu)
4704 struct partial_die_info *part_die;
4705 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
4706 struct abbrev_info *abbrev;
4707 unsigned int bytes_read;
4709 int nesting_level = 1;
4715 = htab_create_alloc_ex (cu->header.length / 12,
4719 &cu->comp_unit_obstack,
4720 hashtab_obstack_allocate,
4721 dummy_obstack_deallocate);
4723 part_die = obstack_alloc (&cu->comp_unit_obstack,
4724 sizeof (struct partial_die_info));
4728 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
4730 /* A NULL abbrev means the end of a series of children. */
4733 if (--nesting_level == 0)
4735 /* PART_DIE was probably the last thing allocated on the
4736 comp_unit_obstack, so we could call obstack_free
4737 here. We don't do that because the waste is small,
4738 and will be cleaned up when we're done with this
4739 compilation unit. This way, we're also more robust
4740 against other users of the comp_unit_obstack. */
4743 info_ptr += bytes_read;
4744 last_die = parent_die;
4745 parent_die = parent_die->die_parent;
4749 /* Check whether this DIE is interesting enough to save. */
4750 if (!is_type_tag_for_partial (abbrev->tag)
4751 && abbrev->tag != DW_TAG_enumerator
4752 && abbrev->tag != DW_TAG_subprogram
4753 && abbrev->tag != DW_TAG_variable
4754 && abbrev->tag != DW_TAG_namespace)
4756 /* Otherwise we skip to the next sibling, if any. */
4757 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
4761 info_ptr = read_partial_die (part_die, abbrev, bytes_read,
4762 abfd, info_ptr, cu);
4764 /* This two-pass algorithm for processing partial symbols has a
4765 high cost in cache pressure. Thus, handle some simple cases
4766 here which cover the majority of C partial symbols. DIEs
4767 which neither have specification tags in them, nor could have
4768 specification tags elsewhere pointing at them, can simply be
4769 processed and discarded.
4771 This segment is also optional; scan_partial_symbols and
4772 add_partial_symbol will handle these DIEs if we chain
4773 them in normally. When compilers which do not emit large
4774 quantities of duplicate debug information are more common,
4775 this code can probably be removed. */
4777 /* Any complete simple types at the top level (pretty much all
4778 of them, for a language without namespaces), can be processed
4780 if (parent_die == NULL
4781 && part_die->has_specification == 0
4782 && part_die->is_declaration == 0
4783 && (part_die->tag == DW_TAG_typedef
4784 || part_die->tag == DW_TAG_base_type
4785 || part_die->tag == DW_TAG_subrange_type))
4787 if (building_psymtab && part_die->name != NULL)
4788 add_psymbol_to_list (part_die->name, strlen (part_die->name),
4789 VAR_DOMAIN, LOC_TYPEDEF,
4790 &cu->objfile->static_psymbols,
4791 0, (CORE_ADDR) 0, cu->language, cu->objfile);
4792 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
4796 /* If we're at the second level, and we're an enumerator, and
4797 our parent has no specification (meaning possibly lives in a
4798 namespace elsewhere), then we can add the partial symbol now
4799 instead of queueing it. */
4800 if (part_die->tag == DW_TAG_enumerator
4801 && parent_die != NULL
4802 && parent_die->die_parent == NULL
4803 && parent_die->tag == DW_TAG_enumeration_type
4804 && parent_die->has_specification == 0)
4806 if (part_die->name == NULL)
4807 complaint (&symfile_complaints, "malformed enumerator DIE ignored");
4808 else if (building_psymtab)
4809 add_psymbol_to_list (part_die->name, strlen (part_die->name),
4810 VAR_DOMAIN, LOC_CONST,
4811 cu->language == language_cplus
4812 ? &cu->objfile->global_psymbols
4813 : &cu->objfile->static_psymbols,
4814 0, (CORE_ADDR) 0, cu->language, cu->objfile);
4816 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
4820 /* We'll save this DIE so link it in. */
4821 part_die->die_parent = parent_die;
4822 part_die->die_sibling = NULL;
4823 part_die->die_child = NULL;
4825 if (last_die && last_die == parent_die)
4826 last_die->die_child = part_die;
4828 last_die->die_sibling = part_die;
4830 last_die = part_die;
4832 if (first_die == NULL)
4833 first_die = part_die;
4835 /* Maybe add the DIE to the hash table. Not all DIEs that we
4836 find interesting need to be in the hash table, because we
4837 also have the parent/sibling/child chains; only those that we
4838 might refer to by offset later during partial symbol reading.
4840 For now this means things that might have be the target of a
4841 DW_AT_specification, DW_AT_abstract_origin, or
4842 DW_AT_extension. DW_AT_extension will refer only to
4843 namespaces; DW_AT_abstract_origin refers to functions (and
4844 many things under the function DIE, but we do not recurse
4845 into function DIEs during partial symbol reading) and
4846 possibly variables as well; DW_AT_specification refers to
4847 declarations. Declarations ought to have the DW_AT_declaration
4848 flag. It happens that GCC forgets to put it in sometimes, but
4849 only for functions, not for types.
4851 Adding more things than necessary to the hash table is harmless
4852 except for the performance cost. Adding too few will result in
4853 internal errors in find_partial_die. */
4855 if (abbrev->tag == DW_TAG_subprogram
4856 || abbrev->tag == DW_TAG_variable
4857 || abbrev->tag == DW_TAG_namespace
4858 || part_die->is_declaration)
4862 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
4863 part_die->offset, INSERT);
4867 part_die = obstack_alloc (&cu->comp_unit_obstack,
4868 sizeof (struct partial_die_info));
4870 /* For some DIEs we want to follow their children (if any). For C
4871 we have no reason to follow the children of structures; for other
4872 languages we have to, both so that we can get at method physnames
4873 to infer fully qualified class names, and for DW_AT_specification. */
4874 if (last_die->has_children
4875 && (last_die->tag == DW_TAG_namespace
4876 || last_die->tag == DW_TAG_enumeration_type
4877 || (cu->language != language_c
4878 && (last_die->tag == DW_TAG_class_type
4879 || last_die->tag == DW_TAG_structure_type
4880 || last_die->tag == DW_TAG_union_type))))
4883 parent_die = last_die;
4887 /* Otherwise we skip to the next sibling, if any. */
4888 info_ptr = locate_pdi_sibling (last_die, info_ptr, abfd, cu);
4890 /* Back to the top, do it again. */
4894 /* Read a minimal amount of information into the minimal die structure. */
4897 read_partial_die (struct partial_die_info *part_die,
4898 struct abbrev_info *abbrev,
4899 unsigned int abbrev_len, bfd *abfd,
4900 char *info_ptr, struct dwarf2_cu *cu)
4902 unsigned int bytes_read, i;
4903 struct attribute attr;
4904 int has_low_pc_attr = 0;
4905 int has_high_pc_attr = 0;
4907 memset (part_die, 0, sizeof (struct partial_die_info));
4909 part_die->offset = info_ptr - dwarf2_per_objfile->info_buffer;
4911 info_ptr += abbrev_len;
4916 part_die->tag = abbrev->tag;
4917 part_die->has_children = abbrev->has_children;
4919 for (i = 0; i < abbrev->num_attrs; ++i)
4921 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
4923 /* Store the data if it is of an attribute we want to keep in a
4924 partial symbol table. */
4929 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
4930 if (part_die->name == NULL)
4931 part_die->name = DW_STRING (&attr);
4933 case DW_AT_comp_dir:
4934 if (part_die->dirname == NULL)
4935 part_die->dirname = DW_STRING (&attr);
4937 case DW_AT_MIPS_linkage_name:
4938 part_die->name = DW_STRING (&attr);
4941 has_low_pc_attr = 1;
4942 part_die->lowpc = DW_ADDR (&attr);
4945 has_high_pc_attr = 1;
4946 part_die->highpc = DW_ADDR (&attr);
4948 case DW_AT_location:
4949 /* Support the .debug_loc offsets */
4950 if (attr_form_is_block (&attr))
4952 part_die->locdesc = DW_BLOCK (&attr);
4954 else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8)
4956 dwarf2_complex_location_expr_complaint ();
4960 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4961 "partial symbol information");
4964 case DW_AT_language:
4965 part_die->language = DW_UNSND (&attr);
4967 case DW_AT_external:
4968 part_die->is_external = DW_UNSND (&attr);
4970 case DW_AT_declaration:
4971 part_die->is_declaration = DW_UNSND (&attr);
4974 part_die->has_type = 1;
4976 case DW_AT_abstract_origin:
4977 case DW_AT_specification:
4978 case DW_AT_extension:
4979 part_die->has_specification = 1;
4980 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr, cu);
4983 /* Ignore absolute siblings, they might point outside of
4984 the current compile unit. */
4985 if (attr.form == DW_FORM_ref_addr)
4986 complaint (&symfile_complaints, "ignoring absolute DW_AT_sibling");
4988 part_die->sibling = dwarf2_per_objfile->info_buffer
4989 + dwarf2_get_ref_die_offset (&attr, cu);
4991 case DW_AT_stmt_list:
4992 part_die->has_stmt_list = 1;
4993 part_die->line_offset = DW_UNSND (&attr);
5000 /* When using the GNU linker, .gnu.linkonce. sections are used to
5001 eliminate duplicate copies of functions and vtables and such.
5002 The linker will arbitrarily choose one and discard the others.
5003 The AT_*_pc values for such functions refer to local labels in
5004 these sections. If the section from that file was discarded, the
5005 labels are not in the output, so the relocs get a value of 0.
5006 If this is a discarded function, mark the pc bounds as invalid,
5007 so that GDB will ignore it. */
5008 if (has_low_pc_attr && has_high_pc_attr
5009 && part_die->lowpc < part_die->highpc
5010 && (part_die->lowpc != 0
5011 || (bfd_get_file_flags (abfd) & HAS_RELOC)))
5012 part_die->has_pc_info = 1;
5016 /* Find a cached partial DIE at OFFSET in CU. */
5018 static struct partial_die_info *
5019 find_partial_die_in_comp_unit (unsigned long offset, struct dwarf2_cu *cu)
5021 struct partial_die_info *lookup_die = NULL;
5022 struct partial_die_info part_die;
5024 part_die.offset = offset;
5025 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
5027 if (lookup_die == NULL)
5028 internal_error (__FILE__, __LINE__,
5029 "could not find partial DIE in cache\n");
5034 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5036 static struct partial_die_info *
5037 find_partial_die (unsigned long offset, struct dwarf2_cu *cu,
5038 struct dwarf2_cu **target_cu)
5040 struct dwarf2_per_cu_data *per_cu;
5042 if (offset >= cu->header.offset
5043 && offset < cu->header.offset + cu->header.length)
5046 return find_partial_die_in_comp_unit (offset, cu);
5049 internal_error (__FILE__, __LINE__,
5050 "unsupported inter-compilation-unit reference");
5053 /* Adjust PART_DIE before generating a symbol for it. This function
5054 may set the is_external flag or change the DIE's name. */
5057 fixup_partial_die (struct partial_die_info *part_die,
5058 struct dwarf2_cu *cu)
5060 /* If we found a reference attribute and the DIE has no name, try
5061 to find a name in the referred to DIE. */
5063 if (part_die->name == NULL && part_die->has_specification)
5065 struct partial_die_info *spec_die;
5066 struct dwarf2_cu *spec_cu;
5068 spec_die = find_partial_die (part_die->spec_offset, cu, &spec_cu);
5070 fixup_partial_die (spec_die, spec_cu);
5074 part_die->name = spec_die->name;
5076 /* Copy DW_AT_external attribute if it is set. */
5077 if (spec_die->is_external)
5078 part_die->is_external = spec_die->is_external;
5082 /* Set default names for some unnamed DIEs. */
5083 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
5084 || part_die->tag == DW_TAG_class_type))
5085 part_die->name = "(anonymous class)";
5087 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
5088 part_die->name = "(anonymous namespace)";
5090 if (part_die->tag == DW_TAG_structure_type
5091 || part_die->tag == DW_TAG_class_type
5092 || part_die->tag == DW_TAG_union_type)
5093 guess_structure_name (part_die, cu);
5096 /* Read the die from the .debug_info section buffer. Set DIEP to
5097 point to a newly allocated die with its information, except for its
5098 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5099 whether the die has children or not. */
5102 read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr,
5103 struct dwarf2_cu *cu, int *has_children)
5105 unsigned int abbrev_number, bytes_read, i, offset;
5106 struct abbrev_info *abbrev;
5107 struct die_info *die;
5109 offset = info_ptr - dwarf2_per_objfile->info_buffer;
5110 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5111 info_ptr += bytes_read;
5114 die = dwarf_alloc_die ();
5116 die->abbrev = abbrev_number;
5123 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
5126 error ("Dwarf Error: could not find abbrev number %d [in module %s]",
5128 bfd_get_filename (abfd));
5130 die = dwarf_alloc_die ();
5131 die->offset = offset;
5132 die->tag = abbrev->tag;
5133 die->abbrev = abbrev_number;
5136 die->num_attrs = abbrev->num_attrs;
5137 die->attrs = (struct attribute *)
5138 xmalloc (die->num_attrs * sizeof (struct attribute));
5140 for (i = 0; i < abbrev->num_attrs; ++i)
5142 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
5143 abfd, info_ptr, cu);
5147 *has_children = abbrev->has_children;
5151 /* Read an attribute value described by an attribute form. */
5154 read_attribute_value (struct attribute *attr, unsigned form,
5155 bfd *abfd, char *info_ptr,
5156 struct dwarf2_cu *cu)
5158 struct comp_unit_head *cu_header = &cu->header;
5159 unsigned int bytes_read;
5160 struct dwarf_block *blk;
5166 case DW_FORM_ref_addr:
5167 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
5168 info_ptr += bytes_read;
5170 case DW_FORM_block2:
5171 blk = dwarf_alloc_block (cu);
5172 blk->size = read_2_bytes (abfd, info_ptr);
5174 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5175 info_ptr += blk->size;
5176 DW_BLOCK (attr) = blk;
5178 case DW_FORM_block4:
5179 blk = dwarf_alloc_block (cu);
5180 blk->size = read_4_bytes (abfd, info_ptr);
5182 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5183 info_ptr += blk->size;
5184 DW_BLOCK (attr) = blk;
5187 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
5191 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
5195 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
5198 case DW_FORM_string:
5199 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
5200 info_ptr += bytes_read;
5203 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
5205 info_ptr += bytes_read;
5208 blk = dwarf_alloc_block (cu);
5209 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5210 info_ptr += bytes_read;
5211 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5212 info_ptr += blk->size;
5213 DW_BLOCK (attr) = blk;
5215 case DW_FORM_block1:
5216 blk = dwarf_alloc_block (cu);
5217 blk->size = read_1_byte (abfd, info_ptr);
5219 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5220 info_ptr += blk->size;
5221 DW_BLOCK (attr) = blk;
5224 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
5228 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
5232 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
5233 info_ptr += bytes_read;
5236 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5237 info_ptr += bytes_read;
5240 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
5244 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
5248 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
5252 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
5255 case DW_FORM_ref_udata:
5256 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5257 info_ptr += bytes_read;
5259 case DW_FORM_indirect:
5260 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5261 info_ptr += bytes_read;
5262 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
5265 error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
5266 dwarf_form_name (form),
5267 bfd_get_filename (abfd));
5272 /* Read an attribute described by an abbreviated attribute. */
5275 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
5276 bfd *abfd, char *info_ptr, struct dwarf2_cu *cu)
5278 attr->name = abbrev->name;
5279 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
5282 /* read dwarf information from a buffer */
5285 read_1_byte (bfd *abfd, char *buf)
5287 return bfd_get_8 (abfd, (bfd_byte *) buf);
5291 read_1_signed_byte (bfd *abfd, char *buf)
5293 return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
5297 read_2_bytes (bfd *abfd, char *buf)
5299 return bfd_get_16 (abfd, (bfd_byte *) buf);
5303 read_2_signed_bytes (bfd *abfd, char *buf)
5305 return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
5309 read_4_bytes (bfd *abfd, char *buf)
5311 return bfd_get_32 (abfd, (bfd_byte *) buf);
5315 read_4_signed_bytes (bfd *abfd, char *buf)
5317 return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
5320 static unsigned long
5321 read_8_bytes (bfd *abfd, char *buf)
5323 return bfd_get_64 (abfd, (bfd_byte *) buf);
5327 read_address (bfd *abfd, char *buf, struct dwarf2_cu *cu, int *bytes_read)
5329 struct comp_unit_head *cu_header = &cu->header;
5330 CORE_ADDR retval = 0;
5332 if (cu_header->signed_addr_p)
5334 switch (cu_header->addr_size)
5337 retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf);
5340 retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf);
5343 retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf);
5346 internal_error (__FILE__, __LINE__,
5347 "read_address: bad switch, signed [in module %s]",
5348 bfd_get_filename (abfd));
5353 switch (cu_header->addr_size)
5356 retval = bfd_get_16 (abfd, (bfd_byte *) buf);
5359 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
5362 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
5365 internal_error (__FILE__, __LINE__,
5366 "read_address: bad switch, unsigned [in module %s]",
5367 bfd_get_filename (abfd));
5371 *bytes_read = cu_header->addr_size;
5375 /* Read the initial length from a section. The (draft) DWARF 3
5376 specification allows the initial length to take up either 4 bytes
5377 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
5378 bytes describe the length and all offsets will be 8 bytes in length
5381 An older, non-standard 64-bit format is also handled by this
5382 function. The older format in question stores the initial length
5383 as an 8-byte quantity without an escape value. Lengths greater
5384 than 2^32 aren't very common which means that the initial 4 bytes
5385 is almost always zero. Since a length value of zero doesn't make
5386 sense for the 32-bit format, this initial zero can be considered to
5387 be an escape value which indicates the presence of the older 64-bit
5388 format. As written, the code can't detect (old format) lengths
5389 greater than 4GB. If it becomes necessary to handle lengths somewhat
5390 larger than 4GB, we could allow other small values (such as the
5391 non-sensical values of 1, 2, and 3) to also be used as escape values
5392 indicating the presence of the old format.
5394 The value returned via bytes_read should be used to increment
5395 the relevant pointer after calling read_initial_length().
5397 As a side effect, this function sets the fields initial_length_size
5398 and offset_size in cu_header to the values appropriate for the
5399 length field. (The format of the initial length field determines
5400 the width of file offsets to be fetched later with fetch_offset().)
5402 [ Note: read_initial_length() and read_offset() are based on the
5403 document entitled "DWARF Debugging Information Format", revision
5404 3, draft 8, dated November 19, 2001. This document was obtained
5407 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
5409 This document is only a draft and is subject to change. (So beware.)
5411 Details regarding the older, non-standard 64-bit format were
5412 determined empirically by examining 64-bit ELF files produced
5413 by the SGI toolchain on an IRIX 6.5 machine.
5415 - Kevin, July 16, 2002
5419 read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header,
5424 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
5426 if (retval == 0xffffffff)
5428 retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4);
5430 if (cu_header != NULL)
5432 cu_header->initial_length_size = 12;
5433 cu_header->offset_size = 8;
5436 else if (retval == 0)
5438 /* Handle (non-standard) 64-bit DWARF2 formats such as that used
5440 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
5442 if (cu_header != NULL)
5444 cu_header->initial_length_size = 8;
5445 cu_header->offset_size = 8;
5451 if (cu_header != NULL)
5453 cu_header->initial_length_size = 4;
5454 cu_header->offset_size = 4;
5461 /* Read an offset from the data stream. The size of the offset is
5462 given by cu_header->offset_size. */
5465 read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
5470 switch (cu_header->offset_size)
5473 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
5477 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
5481 internal_error (__FILE__, __LINE__,
5482 "read_offset: bad switch [in module %s]",
5483 bfd_get_filename (abfd));
5490 read_n_bytes (bfd *abfd, char *buf, unsigned int size)
5492 /* If the size of a host char is 8 bits, we can return a pointer
5493 to the buffer, otherwise we have to copy the data to a buffer
5494 allocated on the temporary obstack. */
5495 gdb_assert (HOST_CHAR_BIT == 8);
5500 read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
5502 /* If the size of a host char is 8 bits, we can return a pointer
5503 to the string, otherwise we have to copy the string to a buffer
5504 allocated on the temporary obstack. */
5505 gdb_assert (HOST_CHAR_BIT == 8);
5508 *bytes_read_ptr = 1;
5511 *bytes_read_ptr = strlen (buf) + 1;
5516 read_indirect_string (bfd *abfd, char *buf,
5517 const struct comp_unit_head *cu_header,
5518 unsigned int *bytes_read_ptr)
5520 LONGEST str_offset = read_offset (abfd, buf, cu_header,
5521 (int *) bytes_read_ptr);
5523 if (dwarf2_per_objfile->str_buffer == NULL)
5525 error ("DW_FORM_strp used without .debug_str section [in module %s]",
5526 bfd_get_filename (abfd));
5529 if (str_offset >= dwarf2_per_objfile->str_size)
5531 error ("DW_FORM_strp pointing outside of .debug_str section [in module %s]",
5532 bfd_get_filename (abfd));
5535 gdb_assert (HOST_CHAR_BIT == 8);
5536 if (dwarf2_per_objfile->str_buffer[str_offset] == '\0')
5538 return dwarf2_per_objfile->str_buffer + str_offset;
5541 static unsigned long
5542 read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
5544 unsigned long result;
5545 unsigned int num_read;
5555 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
5558 result |= ((unsigned long)(byte & 127) << shift);
5559 if ((byte & 128) == 0)
5565 *bytes_read_ptr = num_read;
5570 read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
5573 int i, shift, size, num_read;
5583 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
5586 result |= ((long)(byte & 127) << shift);
5588 if ((byte & 128) == 0)
5593 if ((shift < size) && (byte & 0x40))
5595 result |= -(1 << shift);
5597 *bytes_read_ptr = num_read;
5601 /* Return a pointer to just past the end of an LEB128 number in BUF. */
5604 skip_leb128 (bfd *abfd, char *buf)
5610 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
5612 if ((byte & 128) == 0)
5618 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
5624 cu->language = language_c;
5626 case DW_LANG_C_plus_plus:
5627 cu->language = language_cplus;
5629 case DW_LANG_Fortran77:
5630 case DW_LANG_Fortran90:
5631 case DW_LANG_Fortran95:
5632 cu->language = language_fortran;
5634 case DW_LANG_Mips_Assembler:
5635 cu->language = language_asm;
5638 cu->language = language_java;
5642 case DW_LANG_Cobol74:
5643 case DW_LANG_Cobol85:
5644 case DW_LANG_Pascal83:
5645 case DW_LANG_Modula2:
5647 cu->language = language_minimal;
5650 cu->language_defn = language_def (cu->language);
5653 /* Return the named attribute or NULL if not there. */
5655 static struct attribute *
5656 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
5659 struct attribute *spec = NULL;
5661 for (i = 0; i < die->num_attrs; ++i)
5663 if (die->attrs[i].name == name)
5665 return &die->attrs[i];
5667 if (die->attrs[i].name == DW_AT_specification
5668 || die->attrs[i].name == DW_AT_abstract_origin)
5669 spec = &die->attrs[i];
5673 struct die_info *ref_die =
5674 follow_die_ref (dwarf2_get_ref_die_offset (spec, cu));
5677 return dwarf2_attr (ref_die, name, cu);
5683 /* Return non-zero iff the attribute NAME is defined for the given DIE,
5684 and holds a non-zero value. This function should only be used for
5685 DW_FORM_flag attributes. */
5688 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
5690 struct attribute *attr = dwarf2_attr (die, name, cu);
5692 return (attr && DW_UNSND (attr));
5696 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
5698 /* A DIE is a declaration if it has a DW_AT_declaration attribute
5699 which value is non-zero. However, we have to be careful with
5700 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
5701 (via dwarf2_flag_true_p) follows this attribute. So we may
5702 end up accidently finding a declaration attribute that belongs
5703 to a different DIE referenced by the specification attribute,
5704 even though the given DIE does not have a declaration attribute. */
5705 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
5706 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
5709 /* Return the die giving the specification for DIE, if there is
5712 static struct die_info *
5713 die_specification (struct die_info *die, struct dwarf2_cu *cu)
5715 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, cu);
5717 if (spec_attr == NULL)
5720 return follow_die_ref (dwarf2_get_ref_die_offset (spec_attr, cu));
5723 /* Free the line_header structure *LH, and any arrays and strings it
5726 free_line_header (struct line_header *lh)
5728 if (lh->standard_opcode_lengths)
5729 xfree (lh->standard_opcode_lengths);
5731 /* Remember that all the lh->file_names[i].name pointers are
5732 pointers into debug_line_buffer, and don't need to be freed. */
5734 xfree (lh->file_names);
5736 /* Similarly for the include directory names. */
5737 if (lh->include_dirs)
5738 xfree (lh->include_dirs);
5744 /* Add an entry to LH's include directory table. */
5746 add_include_dir (struct line_header *lh, char *include_dir)
5748 /* Grow the array if necessary. */
5749 if (lh->include_dirs_size == 0)
5751 lh->include_dirs_size = 1; /* for testing */
5752 lh->include_dirs = xmalloc (lh->include_dirs_size
5753 * sizeof (*lh->include_dirs));
5755 else if (lh->num_include_dirs >= lh->include_dirs_size)
5757 lh->include_dirs_size *= 2;
5758 lh->include_dirs = xrealloc (lh->include_dirs,
5759 (lh->include_dirs_size
5760 * sizeof (*lh->include_dirs)));
5763 lh->include_dirs[lh->num_include_dirs++] = include_dir;
5767 /* Add an entry to LH's file name table. */
5769 add_file_name (struct line_header *lh,
5771 unsigned int dir_index,
5772 unsigned int mod_time,
5773 unsigned int length)
5775 struct file_entry *fe;
5777 /* Grow the array if necessary. */
5778 if (lh->file_names_size == 0)
5780 lh->file_names_size = 1; /* for testing */
5781 lh->file_names = xmalloc (lh->file_names_size
5782 * sizeof (*lh->file_names));
5784 else if (lh->num_file_names >= lh->file_names_size)
5786 lh->file_names_size *= 2;
5787 lh->file_names = xrealloc (lh->file_names,
5788 (lh->file_names_size
5789 * sizeof (*lh->file_names)));
5792 fe = &lh->file_names[lh->num_file_names++];
5794 fe->dir_index = dir_index;
5795 fe->mod_time = mod_time;
5796 fe->length = length;
5801 /* Read the statement program header starting at OFFSET in
5802 .debug_line, according to the endianness of ABFD. Return a pointer
5803 to a struct line_header, allocated using xmalloc.
5805 NOTE: the strings in the include directory and file name tables of
5806 the returned object point into debug_line_buffer, and must not be
5808 static struct line_header *
5809 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
5810 struct dwarf2_cu *cu)
5812 struct cleanup *back_to;
5813 struct line_header *lh;
5817 char *cur_dir, *cur_file;
5819 if (dwarf2_per_objfile->line_buffer == NULL)
5821 complaint (&symfile_complaints, "missing .debug_line section");
5825 /* Make sure that at least there's room for the total_length field. That
5826 could be 12 bytes long, but we're just going to fudge that. */
5827 if (offset + 4 >= dwarf2_per_objfile->line_size)
5829 dwarf2_statement_list_fits_in_line_number_section_complaint ();
5833 lh = xmalloc (sizeof (*lh));
5834 memset (lh, 0, sizeof (*lh));
5835 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
5838 line_ptr = dwarf2_per_objfile->line_buffer + offset;
5840 /* read in the header */
5841 lh->total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read);
5842 line_ptr += bytes_read;
5843 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line_buffer
5844 + dwarf2_per_objfile->line_size))
5846 dwarf2_statement_list_fits_in_line_number_section_complaint ();
5849 lh->statement_program_end = line_ptr + lh->total_length;
5850 lh->version = read_2_bytes (abfd, line_ptr);
5852 lh->header_length = read_offset (abfd, line_ptr, &cu->header, &bytes_read);
5853 line_ptr += bytes_read;
5854 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
5856 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
5858 lh->line_base = read_1_signed_byte (abfd, line_ptr);
5860 lh->line_range = read_1_byte (abfd, line_ptr);
5862 lh->opcode_base = read_1_byte (abfd, line_ptr);
5864 lh->standard_opcode_lengths
5865 = (unsigned char *) xmalloc (lh->opcode_base * sizeof (unsigned char));
5867 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
5868 for (i = 1; i < lh->opcode_base; ++i)
5870 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
5874 /* Read directory table */
5875 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
5877 line_ptr += bytes_read;
5878 add_include_dir (lh, cur_dir);
5880 line_ptr += bytes_read;
5882 /* Read file name table */
5883 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
5885 unsigned int dir_index, mod_time, length;
5887 line_ptr += bytes_read;
5888 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
5889 line_ptr += bytes_read;
5890 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
5891 line_ptr += bytes_read;
5892 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
5893 line_ptr += bytes_read;
5895 add_file_name (lh, cur_file, dir_index, mod_time, length);
5897 line_ptr += bytes_read;
5898 lh->statement_program_start = line_ptr;
5900 if (line_ptr > (dwarf2_per_objfile->line_buffer
5901 + dwarf2_per_objfile->line_size))
5902 complaint (&symfile_complaints,
5903 "line number info header doesn't fit in `.debug_line' section");
5905 discard_cleanups (back_to);
5909 /* This function exists to work around a bug in certain compilers
5910 (particularly GCC 2.95), in which the first line number marker of a
5911 function does not show up until after the prologue, right before
5912 the second line number marker. This function shifts ADDRESS down
5913 to the beginning of the function if necessary, and is called on
5914 addresses passed to record_line. */
5917 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
5919 struct function_range *fn;
5921 /* Find the function_range containing address. */
5926 cu->cached_fn = cu->first_fn;
5930 if (fn->lowpc <= address && fn->highpc > address)
5936 while (fn && fn != cu->cached_fn)
5937 if (fn->lowpc <= address && fn->highpc > address)
5947 if (address != fn->lowpc)
5948 complaint (&symfile_complaints,
5949 "misplaced first line number at 0x%lx for '%s'",
5950 (unsigned long) address, fn->name);
5955 /* Decode the Line Number Program (LNP) for the given line_header
5956 structure and CU. The actual information extracted and the type
5957 of structures created from the LNP depends on the value of PST.
5959 1. If PST is NULL, then this procedure uses the data from the program
5960 to create all necessary symbol tables, and their linetables.
5961 The compilation directory of the file is passed in COMP_DIR,
5962 and must not be NULL.
5964 2. If PST is not NULL, this procedure reads the program to determine
5965 the list of files included by the unit represented by PST, and
5966 builds all the associated partial symbol tables. In this case,
5967 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
5968 is not used to compute the full name of the symtab, and therefore
5969 omitting it when building the partial symtab does not introduce
5970 the potential for inconsistency - a partial symtab and its associated
5971 symbtab having a different fullname -). */
5974 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
5975 struct dwarf2_cu *cu, struct partial_symtab *pst)
5979 unsigned int bytes_read;
5980 unsigned char op_code, extended_op, adj_opcode;
5982 struct objfile *objfile = cu->objfile;
5983 const int decode_for_pst_p = (pst != NULL);
5985 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5987 line_ptr = lh->statement_program_start;
5988 line_end = lh->statement_program_end;
5990 /* Read the statement sequences until there's nothing left. */
5991 while (line_ptr < line_end)
5993 /* state machine registers */
5994 CORE_ADDR address = 0;
5995 unsigned int file = 1;
5996 unsigned int line = 1;
5997 unsigned int column = 0;
5998 int is_stmt = lh->default_is_stmt;
5999 int basic_block = 0;
6000 int end_sequence = 0;
6002 if (!decode_for_pst_p && lh->num_file_names >= file)
6004 /* Start a subfile for the current file of the state machine. */
6005 /* lh->include_dirs and lh->file_names are 0-based, but the
6006 directory and file name numbers in the statement program
6008 struct file_entry *fe = &lh->file_names[file - 1];
6011 dir = lh->include_dirs[fe->dir_index - 1];
6014 dwarf2_start_subfile (fe->name, dir);
6017 /* Decode the table. */
6018 while (!end_sequence)
6020 op_code = read_1_byte (abfd, line_ptr);
6023 if (op_code >= lh->opcode_base)
6024 { /* Special operand. */
6025 adj_opcode = op_code - lh->opcode_base;
6026 address += (adj_opcode / lh->line_range)
6027 * lh->minimum_instruction_length;
6028 line += lh->line_base + (adj_opcode % lh->line_range);
6029 lh->file_names[file - 1].included_p = 1;
6030 if (!decode_for_pst_p)
6032 /* append row to matrix using current values */
6033 record_line (current_subfile, line,
6034 check_cu_functions (address, cu));
6038 else switch (op_code)
6040 case DW_LNS_extended_op:
6041 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6042 line_ptr += bytes_read;
6043 extended_op = read_1_byte (abfd, line_ptr);
6045 switch (extended_op)
6047 case DW_LNE_end_sequence:
6049 lh->file_names[file - 1].included_p = 1;
6050 if (!decode_for_pst_p)
6051 record_line (current_subfile, 0, address);
6053 case DW_LNE_set_address:
6054 address = read_address (abfd, line_ptr, cu, &bytes_read);
6055 line_ptr += bytes_read;
6056 address += baseaddr;
6058 case DW_LNE_define_file:
6061 unsigned int dir_index, mod_time, length;
6063 cur_file = read_string (abfd, line_ptr, &bytes_read);
6064 line_ptr += bytes_read;
6066 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6067 line_ptr += bytes_read;
6069 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6070 line_ptr += bytes_read;
6072 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6073 line_ptr += bytes_read;
6074 add_file_name (lh, cur_file, dir_index, mod_time, length);
6078 complaint (&symfile_complaints,
6079 "mangled .debug_line section");
6084 lh->file_names[file - 1].included_p = 1;
6085 if (!decode_for_pst_p)
6086 record_line (current_subfile, line,
6087 check_cu_functions (address, cu));
6090 case DW_LNS_advance_pc:
6091 address += lh->minimum_instruction_length
6092 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6093 line_ptr += bytes_read;
6095 case DW_LNS_advance_line:
6096 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
6097 line_ptr += bytes_read;
6099 case DW_LNS_set_file:
6101 /* lh->include_dirs and lh->file_names are 0-based,
6102 but the directory and file name numbers in the
6103 statement program are 1-based. */
6104 struct file_entry *fe;
6106 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6107 line_ptr += bytes_read;
6108 fe = &lh->file_names[file - 1];
6110 dir = lh->include_dirs[fe->dir_index - 1];
6113 if (!decode_for_pst_p)
6114 dwarf2_start_subfile (fe->name, dir);
6117 case DW_LNS_set_column:
6118 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6119 line_ptr += bytes_read;
6121 case DW_LNS_negate_stmt:
6122 is_stmt = (!is_stmt);
6124 case DW_LNS_set_basic_block:
6127 /* Add to the address register of the state machine the
6128 address increment value corresponding to special opcode
6129 255. Ie, this value is scaled by the minimum instruction
6130 length since special opcode 255 would have scaled the
6132 case DW_LNS_const_add_pc:
6133 address += (lh->minimum_instruction_length
6134 * ((255 - lh->opcode_base) / lh->line_range));
6136 case DW_LNS_fixed_advance_pc:
6137 address += read_2_bytes (abfd, line_ptr);
6141 { /* Unknown standard opcode, ignore it. */
6143 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
6145 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6146 line_ptr += bytes_read;
6153 if (decode_for_pst_p)
6157 /* Now that we're done scanning the Line Header Program, we can
6158 create the psymtab of each included file. */
6159 for (file_index = 0; file_index < lh->num_file_names; file_index++)
6160 if (lh->file_names[file_index].included_p == 1)
6162 char *include_name = lh->file_names [file_index].name;
6164 if (strcmp (include_name, pst->filename) != 0)
6165 dwarf2_create_include_psymtab (include_name, pst, objfile);
6170 /* Start a subfile for DWARF. FILENAME is the name of the file and
6171 DIRNAME the name of the source directory which contains FILENAME
6172 or NULL if not known.
6173 This routine tries to keep line numbers from identical absolute and
6174 relative file names in a common subfile.
6176 Using the `list' example from the GDB testsuite, which resides in
6177 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
6178 of /srcdir/list0.c yields the following debugging information for list0.c:
6180 DW_AT_name: /srcdir/list0.c
6181 DW_AT_comp_dir: /compdir
6182 files.files[0].name: list0.h
6183 files.files[0].dir: /srcdir
6184 files.files[1].name: list0.c
6185 files.files[1].dir: /srcdir
6187 The line number information for list0.c has to end up in a single
6188 subfile, so that `break /srcdir/list0.c:1' works as expected. */
6191 dwarf2_start_subfile (char *filename, char *dirname)
6193 /* If the filename isn't absolute, try to match an existing subfile
6194 with the full pathname. */
6196 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
6198 struct subfile *subfile;
6199 char *fullname = concat (dirname, "/", filename, NULL);
6201 for (subfile = subfiles; subfile; subfile = subfile->next)
6203 if (FILENAME_CMP (subfile->name, fullname) == 0)
6205 current_subfile = subfile;
6212 start_subfile (filename, dirname);
6216 var_decode_location (struct attribute *attr, struct symbol *sym,
6217 struct dwarf2_cu *cu)
6219 struct objfile *objfile = cu->objfile;
6220 struct comp_unit_head *cu_header = &cu->header;
6222 /* NOTE drow/2003-01-30: There used to be a comment and some special
6223 code here to turn a symbol with DW_AT_external and a
6224 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
6225 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
6226 with some versions of binutils) where shared libraries could have
6227 relocations against symbols in their debug information - the
6228 minimal symbol would have the right address, but the debug info
6229 would not. It's no longer necessary, because we will explicitly
6230 apply relocations when we read in the debug information now. */
6232 /* A DW_AT_location attribute with no contents indicates that a
6233 variable has been optimized away. */
6234 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
6236 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
6240 /* Handle one degenerate form of location expression specially, to
6241 preserve GDB's previous behavior when section offsets are
6242 specified. If this is just a DW_OP_addr then mark this symbol
6245 if (attr_form_is_block (attr)
6246 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
6247 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
6251 SYMBOL_VALUE_ADDRESS (sym) =
6252 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
6253 fixup_symbol_section (sym, objfile);
6254 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
6255 SYMBOL_SECTION (sym));
6256 SYMBOL_CLASS (sym) = LOC_STATIC;
6260 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
6261 expression evaluator, and use LOC_COMPUTED only when necessary
6262 (i.e. when the value of a register or memory location is
6263 referenced, or a thread-local block, etc.). Then again, it might
6264 not be worthwhile. I'm assuming that it isn't unless performance
6265 or memory numbers show me otherwise. */
6267 dwarf2_symbol_mark_computed (attr, sym, cu);
6268 SYMBOL_CLASS (sym) = LOC_COMPUTED;
6271 /* Given a pointer to a DWARF information entry, figure out if we need
6272 to make a symbol table entry for it, and if so, create a new entry
6273 and return a pointer to it.
6274 If TYPE is NULL, determine symbol type from the die, otherwise
6275 used the passed type. */
6277 static struct symbol *
6278 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
6280 struct objfile *objfile = cu->objfile;
6281 struct symbol *sym = NULL;
6283 struct attribute *attr = NULL;
6284 struct attribute *attr2 = NULL;
6287 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6289 if (die->tag != DW_TAG_namespace)
6290 name = dwarf2_linkage_name (die, cu);
6292 name = TYPE_NAME (type);
6296 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
6297 sizeof (struct symbol));
6298 OBJSTAT (objfile, n_syms++);
6299 memset (sym, 0, sizeof (struct symbol));
6301 /* Cache this symbol's name and the name's demangled form (if any). */
6302 SYMBOL_LANGUAGE (sym) = cu->language;
6303 SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
6305 /* Default assumptions.
6306 Use the passed type or decode it from the die. */
6307 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
6308 SYMBOL_CLASS (sym) = LOC_STATIC;
6310 SYMBOL_TYPE (sym) = type;
6312 SYMBOL_TYPE (sym) = die_type (die, cu);
6313 attr = dwarf2_attr (die, DW_AT_decl_line, cu);
6316 SYMBOL_LINE (sym) = DW_UNSND (attr);
6321 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
6324 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
6326 SYMBOL_CLASS (sym) = LOC_LABEL;
6328 case DW_TAG_subprogram:
6329 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
6331 SYMBOL_CLASS (sym) = LOC_BLOCK;
6332 attr2 = dwarf2_attr (die, DW_AT_external, cu);
6333 if (attr2 && (DW_UNSND (attr2) != 0))
6335 add_symbol_to_list (sym, &global_symbols);
6339 add_symbol_to_list (sym, cu->list_in_scope);
6342 case DW_TAG_variable:
6343 /* Compilation with minimal debug info may result in variables
6344 with missing type entries. Change the misleading `void' type
6345 to something sensible. */
6346 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
6347 SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT,
6348 TARGET_INT_BIT / HOST_CHAR_BIT, 0,
6349 "<variable, no debug info>",
6351 attr = dwarf2_attr (die, DW_AT_const_value, cu);
6354 dwarf2_const_value (attr, sym, cu);
6355 attr2 = dwarf2_attr (die, DW_AT_external, cu);
6356 if (attr2 && (DW_UNSND (attr2) != 0))
6357 add_symbol_to_list (sym, &global_symbols);
6359 add_symbol_to_list (sym, cu->list_in_scope);
6362 attr = dwarf2_attr (die, DW_AT_location, cu);
6365 var_decode_location (attr, sym, cu);
6366 attr2 = dwarf2_attr (die, DW_AT_external, cu);
6367 if (attr2 && (DW_UNSND (attr2) != 0))
6368 add_symbol_to_list (sym, &global_symbols);
6370 add_symbol_to_list (sym, cu->list_in_scope);
6374 /* We do not know the address of this symbol.
6375 If it is an external symbol and we have type information
6376 for it, enter the symbol as a LOC_UNRESOLVED symbol.
6377 The address of the variable will then be determined from
6378 the minimal symbol table whenever the variable is
6380 attr2 = dwarf2_attr (die, DW_AT_external, cu);
6381 if (attr2 && (DW_UNSND (attr2) != 0)
6382 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
6384 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
6385 add_symbol_to_list (sym, &global_symbols);
6389 case DW_TAG_formal_parameter:
6390 attr = dwarf2_attr (die, DW_AT_location, cu);
6393 var_decode_location (attr, sym, cu);
6394 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
6395 if (SYMBOL_CLASS (sym) == LOC_COMPUTED)
6396 SYMBOL_CLASS (sym) = LOC_COMPUTED_ARG;
6398 attr = dwarf2_attr (die, DW_AT_const_value, cu);
6401 dwarf2_const_value (attr, sym, cu);
6403 add_symbol_to_list (sym, cu->list_in_scope);
6405 case DW_TAG_unspecified_parameters:
6406 /* From varargs functions; gdb doesn't seem to have any
6407 interest in this information, so just ignore it for now.
6410 case DW_TAG_class_type:
6411 case DW_TAG_structure_type:
6412 case DW_TAG_union_type:
6413 case DW_TAG_enumeration_type:
6414 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
6415 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
6417 /* Make sure that the symbol includes appropriate enclosing
6418 classes/namespaces in its name. These are calculated in
6419 read_structure_type, and the correct name is saved in
6422 if (cu->language == language_cplus)
6424 struct type *type = SYMBOL_TYPE (sym);
6426 if (TYPE_TAG_NAME (type) != NULL)
6428 /* FIXME: carlton/2003-11-10: Should this use
6429 SYMBOL_SET_NAMES instead? (The same problem also
6430 arises further down in this function.) */
6431 /* The type's name is already allocated along with
6432 this objfile, so we don't need to duplicate it
6434 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
6439 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
6440 really ever be static objects: otherwise, if you try
6441 to, say, break of a class's method and you're in a file
6442 which doesn't mention that class, it won't work unless
6443 the check for all static symbols in lookup_symbol_aux
6444 saves you. See the OtherFileClass tests in
6445 gdb.c++/namespace.exp. */
6447 struct pending **list_to_add;
6449 list_to_add = (cu->list_in_scope == &file_symbols
6450 && cu->language == language_cplus
6451 ? &global_symbols : cu->list_in_scope);
6453 add_symbol_to_list (sym, list_to_add);
6455 /* The semantics of C++ state that "struct foo { ... }" also
6456 defines a typedef for "foo". Synthesize a typedef symbol so
6457 that "ptype foo" works as expected. */
6458 if (cu->language == language_cplus)
6460 struct symbol *typedef_sym = (struct symbol *)
6461 obstack_alloc (&objfile->objfile_obstack,
6462 sizeof (struct symbol));
6463 *typedef_sym = *sym;
6464 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
6465 /* The symbol's name is already allocated along with
6466 this objfile, so we don't need to duplicate it for
6468 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
6469 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NATURAL_NAME (sym);
6470 add_symbol_to_list (typedef_sym, list_to_add);
6474 case DW_TAG_typedef:
6475 if (processing_has_namespace_info
6476 && processing_current_prefix[0] != '\0')
6478 SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack,
6479 processing_current_prefix,
6483 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
6484 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
6485 add_symbol_to_list (sym, cu->list_in_scope);
6487 case DW_TAG_base_type:
6488 case DW_TAG_subrange_type:
6489 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
6490 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
6491 add_symbol_to_list (sym, cu->list_in_scope);
6493 case DW_TAG_enumerator:
6494 if (processing_has_namespace_info
6495 && processing_current_prefix[0] != '\0')
6497 SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack,
6498 processing_current_prefix,
6502 attr = dwarf2_attr (die, DW_AT_const_value, cu);
6505 dwarf2_const_value (attr, sym, cu);
6508 /* NOTE: carlton/2003-11-10: See comment above in the
6509 DW_TAG_class_type, etc. block. */
6511 struct pending **list_to_add;
6513 list_to_add = (cu->list_in_scope == &file_symbols
6514 && cu->language == language_cplus
6515 ? &global_symbols : cu->list_in_scope);
6517 add_symbol_to_list (sym, list_to_add);
6520 case DW_TAG_namespace:
6521 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
6522 add_symbol_to_list (sym, &global_symbols);
6525 /* Not a tag we recognize. Hopefully we aren't processing
6526 trash data, but since we must specifically ignore things
6527 we don't recognize, there is nothing else we should do at
6529 complaint (&symfile_complaints, "unsupported tag: '%s'",
6530 dwarf_tag_name (die->tag));
6537 /* Copy constant value from an attribute to a symbol. */
6540 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
6541 struct dwarf2_cu *cu)
6543 struct objfile *objfile = cu->objfile;
6544 struct comp_unit_head *cu_header = &cu->header;
6545 struct dwarf_block *blk;
6550 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
6551 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
6552 cu_header->addr_size,
6553 TYPE_LENGTH (SYMBOL_TYPE
6555 SYMBOL_VALUE_BYTES (sym) = (char *)
6556 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
6557 /* NOTE: cagney/2003-05-09: In-lined store_address call with
6558 it's body - store_unsigned_integer. */
6559 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
6561 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
6563 case DW_FORM_block1:
6564 case DW_FORM_block2:
6565 case DW_FORM_block4:
6567 blk = DW_BLOCK (attr);
6568 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
6569 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
6571 TYPE_LENGTH (SYMBOL_TYPE
6573 SYMBOL_VALUE_BYTES (sym) = (char *)
6574 obstack_alloc (&objfile->objfile_obstack, blk->size);
6575 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
6576 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
6579 /* The DW_AT_const_value attributes are supposed to carry the
6580 symbol's value "represented as it would be on the target
6581 architecture." By the time we get here, it's already been
6582 converted to host endianness, so we just need to sign- or
6583 zero-extend it as appropriate. */
6585 dwarf2_const_value_data (attr, sym, 8);
6588 dwarf2_const_value_data (attr, sym, 16);
6591 dwarf2_const_value_data (attr, sym, 32);
6594 dwarf2_const_value_data (attr, sym, 64);
6598 SYMBOL_VALUE (sym) = DW_SND (attr);
6599 SYMBOL_CLASS (sym) = LOC_CONST;
6603 SYMBOL_VALUE (sym) = DW_UNSND (attr);
6604 SYMBOL_CLASS (sym) = LOC_CONST;
6608 complaint (&symfile_complaints,
6609 "unsupported const value attribute form: '%s'",
6610 dwarf_form_name (attr->form));
6611 SYMBOL_VALUE (sym) = 0;
6612 SYMBOL_CLASS (sym) = LOC_CONST;
6618 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
6619 or zero-extend it as appropriate for the symbol's type. */
6621 dwarf2_const_value_data (struct attribute *attr,
6625 LONGEST l = DW_UNSND (attr);
6627 if (bits < sizeof (l) * 8)
6629 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
6630 l &= ((LONGEST) 1 << bits) - 1;
6632 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
6635 SYMBOL_VALUE (sym) = l;
6636 SYMBOL_CLASS (sym) = LOC_CONST;
6640 /* Return the type of the die in question using its DW_AT_type attribute. */
6642 static struct type *
6643 die_type (struct die_info *die, struct dwarf2_cu *cu)
6646 struct attribute *type_attr;
6647 struct die_info *type_die;
6650 type_attr = dwarf2_attr (die, DW_AT_type, cu);
6653 /* A missing DW_AT_type represents a void type. */
6654 return dwarf2_fundamental_type (cu->objfile, FT_VOID, cu);
6658 ref = dwarf2_get_ref_die_offset (type_attr, cu);
6659 type_die = follow_die_ref (ref);
6662 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]",
6663 ref, cu->objfile->name);
6667 type = tag_type_to_type (type_die, cu);
6670 dump_die (type_die);
6671 error ("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]",
6677 /* Return the containing type of the die in question using its
6678 DW_AT_containing_type attribute. */
6680 static struct type *
6681 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
6683 struct type *type = NULL;
6684 struct attribute *type_attr;
6685 struct die_info *type_die = NULL;
6688 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
6691 ref = dwarf2_get_ref_die_offset (type_attr, cu);
6692 type_die = follow_die_ref (ref);
6695 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", ref,
6699 type = tag_type_to_type (type_die, cu);
6704 dump_die (type_die);
6705 error ("Dwarf Error: Problem turning containing type into gdb type [in module %s]",
6712 static struct type *
6713 type_at_offset (unsigned int offset, struct dwarf2_cu *cu)
6715 struct die_info *die;
6718 die = follow_die_ref (offset);
6721 error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
6724 type = tag_type_to_type (die, cu);
6729 static struct type *
6730 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
6738 read_type_die (die, cu);
6742 error ("Dwarf Error: Cannot find type of die [in module %s]",
6750 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
6752 char *prefix = determine_prefix (die, cu);
6753 const char *old_prefix = processing_current_prefix;
6754 struct cleanup *back_to = make_cleanup (xfree, prefix);
6755 processing_current_prefix = prefix;
6759 case DW_TAG_class_type:
6760 case DW_TAG_structure_type:
6761 case DW_TAG_union_type:
6762 read_structure_type (die, cu);
6764 case DW_TAG_enumeration_type:
6765 read_enumeration_type (die, cu);
6767 case DW_TAG_subprogram:
6768 case DW_TAG_subroutine_type:
6769 read_subroutine_type (die, cu);
6771 case DW_TAG_array_type:
6772 read_array_type (die, cu);
6774 case DW_TAG_pointer_type:
6775 read_tag_pointer_type (die, cu);
6777 case DW_TAG_ptr_to_member_type:
6778 read_tag_ptr_to_member_type (die, cu);
6780 case DW_TAG_reference_type:
6781 read_tag_reference_type (die, cu);
6783 case DW_TAG_const_type:
6784 read_tag_const_type (die, cu);
6786 case DW_TAG_volatile_type:
6787 read_tag_volatile_type (die, cu);
6789 case DW_TAG_string_type:
6790 read_tag_string_type (die, cu);
6792 case DW_TAG_typedef:
6793 read_typedef (die, cu);
6795 case DW_TAG_subrange_type:
6796 read_subrange_type (die, cu);
6798 case DW_TAG_base_type:
6799 read_base_type (die, cu);
6802 complaint (&symfile_complaints, "unexepected tag in read_type_die: '%s'",
6803 dwarf_tag_name (die->tag));
6807 processing_current_prefix = old_prefix;
6808 do_cleanups (back_to);
6811 /* Return the name of the namespace/class that DIE is defined within,
6812 or "" if we can't tell. The caller should xfree the result. */
6814 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
6815 therein) for an example of how to use this function to deal with
6816 DW_AT_specification. */
6819 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
6821 struct die_info *parent;
6823 if (cu->language != language_cplus)
6826 parent = die->parent;
6830 return xstrdup ("");
6834 switch (parent->tag) {
6835 case DW_TAG_namespace:
6837 /* FIXME: carlton/2004-03-05: Should I follow extension dies
6838 before doing this check? */
6839 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
6841 return xstrdup (TYPE_TAG_NAME (parent->type));
6846 char *parent_prefix = determine_prefix (parent, cu);
6847 char *retval = typename_concat (parent_prefix,
6848 namespace_name (parent, &dummy,
6850 xfree (parent_prefix);
6855 case DW_TAG_class_type:
6856 case DW_TAG_structure_type:
6858 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
6860 return xstrdup (TYPE_TAG_NAME (parent->type));
6864 const char *old_prefix = processing_current_prefix;
6865 char *new_prefix = determine_prefix (parent, cu);
6868 processing_current_prefix = new_prefix;
6869 retval = determine_class_name (parent, cu);
6870 processing_current_prefix = old_prefix;
6877 return determine_prefix (parent, cu);
6882 /* Return a newly-allocated string formed by concatenating PREFIX,
6883 "::", and SUFFIX, except that if PREFIX is NULL or the empty
6884 string, just return a copy of SUFFIX. */
6887 typename_concat (const char *prefix, const char *suffix)
6889 if (prefix == NULL || prefix[0] == '\0')
6890 return xstrdup (suffix);
6893 char *retval = xmalloc (strlen (prefix) + 2 + strlen (suffix) + 1);
6895 strcpy (retval, prefix);
6896 strcat (retval, "::");
6897 strcat (retval, suffix);
6903 static struct type *
6904 dwarf_base_type (int encoding, int size, struct dwarf2_cu *cu)
6906 struct objfile *objfile = cu->objfile;
6908 /* FIXME - this should not produce a new (struct type *)
6909 every time. It should cache base types. */
6913 case DW_ATE_address:
6914 type = dwarf2_fundamental_type (objfile, FT_VOID, cu);
6916 case DW_ATE_boolean:
6917 type = dwarf2_fundamental_type (objfile, FT_BOOLEAN, cu);
6919 case DW_ATE_complex_float:
6922 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX, cu);
6926 type = dwarf2_fundamental_type (objfile, FT_COMPLEX, cu);
6932 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
6936 type = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
6943 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
6946 type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT, cu);
6950 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
6954 case DW_ATE_signed_char:
6955 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
6957 case DW_ATE_unsigned:
6961 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
6964 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT, cu);
6968 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER, cu);
6972 case DW_ATE_unsigned_char:
6973 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
6976 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
6983 copy_die (struct die_info *old_die)
6985 struct die_info *new_die;
6988 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
6989 memset (new_die, 0, sizeof (struct die_info));
6991 new_die->tag = old_die->tag;
6992 new_die->has_children = old_die->has_children;
6993 new_die->abbrev = old_die->abbrev;
6994 new_die->offset = old_die->offset;
6995 new_die->type = NULL;
6997 num_attrs = old_die->num_attrs;
6998 new_die->num_attrs = num_attrs;
6999 new_die->attrs = (struct attribute *)
7000 xmalloc (num_attrs * sizeof (struct attribute));
7002 for (i = 0; i < old_die->num_attrs; ++i)
7004 new_die->attrs[i].name = old_die->attrs[i].name;
7005 new_die->attrs[i].form = old_die->attrs[i].form;
7006 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
7009 new_die->next = NULL;
7014 /* Return sibling of die, NULL if no sibling. */
7016 static struct die_info *
7017 sibling_die (struct die_info *die)
7019 return die->sibling;
7022 /* Get linkage name of a die, return NULL if not found. */
7025 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
7027 struct attribute *attr;
7029 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7030 if (attr && DW_STRING (attr))
7031 return DW_STRING (attr);
7032 attr = dwarf2_attr (die, DW_AT_name, cu);
7033 if (attr && DW_STRING (attr))
7034 return DW_STRING (attr);
7038 /* Get name of a die, return NULL if not found. */
7041 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
7043 struct attribute *attr;
7045 attr = dwarf2_attr (die, DW_AT_name, cu);
7046 if (attr && DW_STRING (attr))
7047 return DW_STRING (attr);
7051 /* Return the die that this die in an extension of, or NULL if there
7054 static struct die_info *
7055 dwarf2_extension (struct die_info *die, struct dwarf2_cu *cu)
7057 struct attribute *attr;
7058 struct die_info *extension_die;
7061 attr = dwarf2_attr (die, DW_AT_extension, cu);
7065 ref = dwarf2_get_ref_die_offset (attr, cu);
7066 extension_die = follow_die_ref (ref);
7069 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
7072 return extension_die;
7075 /* Convert a DIE tag into its string name. */
7078 dwarf_tag_name (unsigned tag)
7082 case DW_TAG_padding:
7083 return "DW_TAG_padding";
7084 case DW_TAG_array_type:
7085 return "DW_TAG_array_type";
7086 case DW_TAG_class_type:
7087 return "DW_TAG_class_type";
7088 case DW_TAG_entry_point:
7089 return "DW_TAG_entry_point";
7090 case DW_TAG_enumeration_type:
7091 return "DW_TAG_enumeration_type";
7092 case DW_TAG_formal_parameter:
7093 return "DW_TAG_formal_parameter";
7094 case DW_TAG_imported_declaration:
7095 return "DW_TAG_imported_declaration";
7097 return "DW_TAG_label";
7098 case DW_TAG_lexical_block:
7099 return "DW_TAG_lexical_block";
7101 return "DW_TAG_member";
7102 case DW_TAG_pointer_type:
7103 return "DW_TAG_pointer_type";
7104 case DW_TAG_reference_type:
7105 return "DW_TAG_reference_type";
7106 case DW_TAG_compile_unit:
7107 return "DW_TAG_compile_unit";
7108 case DW_TAG_string_type:
7109 return "DW_TAG_string_type";
7110 case DW_TAG_structure_type:
7111 return "DW_TAG_structure_type";
7112 case DW_TAG_subroutine_type:
7113 return "DW_TAG_subroutine_type";
7114 case DW_TAG_typedef:
7115 return "DW_TAG_typedef";
7116 case DW_TAG_union_type:
7117 return "DW_TAG_union_type";
7118 case DW_TAG_unspecified_parameters:
7119 return "DW_TAG_unspecified_parameters";
7120 case DW_TAG_variant:
7121 return "DW_TAG_variant";
7122 case DW_TAG_common_block:
7123 return "DW_TAG_common_block";
7124 case DW_TAG_common_inclusion:
7125 return "DW_TAG_common_inclusion";
7126 case DW_TAG_inheritance:
7127 return "DW_TAG_inheritance";
7128 case DW_TAG_inlined_subroutine:
7129 return "DW_TAG_inlined_subroutine";
7131 return "DW_TAG_module";
7132 case DW_TAG_ptr_to_member_type:
7133 return "DW_TAG_ptr_to_member_type";
7134 case DW_TAG_set_type:
7135 return "DW_TAG_set_type";
7136 case DW_TAG_subrange_type:
7137 return "DW_TAG_subrange_type";
7138 case DW_TAG_with_stmt:
7139 return "DW_TAG_with_stmt";
7140 case DW_TAG_access_declaration:
7141 return "DW_TAG_access_declaration";
7142 case DW_TAG_base_type:
7143 return "DW_TAG_base_type";
7144 case DW_TAG_catch_block:
7145 return "DW_TAG_catch_block";
7146 case DW_TAG_const_type:
7147 return "DW_TAG_const_type";
7148 case DW_TAG_constant:
7149 return "DW_TAG_constant";
7150 case DW_TAG_enumerator:
7151 return "DW_TAG_enumerator";
7152 case DW_TAG_file_type:
7153 return "DW_TAG_file_type";
7155 return "DW_TAG_friend";
7156 case DW_TAG_namelist:
7157 return "DW_TAG_namelist";
7158 case DW_TAG_namelist_item:
7159 return "DW_TAG_namelist_item";
7160 case DW_TAG_packed_type:
7161 return "DW_TAG_packed_type";
7162 case DW_TAG_subprogram:
7163 return "DW_TAG_subprogram";
7164 case DW_TAG_template_type_param:
7165 return "DW_TAG_template_type_param";
7166 case DW_TAG_template_value_param:
7167 return "DW_TAG_template_value_param";
7168 case DW_TAG_thrown_type:
7169 return "DW_TAG_thrown_type";
7170 case DW_TAG_try_block:
7171 return "DW_TAG_try_block";
7172 case DW_TAG_variant_part:
7173 return "DW_TAG_variant_part";
7174 case DW_TAG_variable:
7175 return "DW_TAG_variable";
7176 case DW_TAG_volatile_type:
7177 return "DW_TAG_volatile_type";
7178 case DW_TAG_dwarf_procedure:
7179 return "DW_TAG_dwarf_procedure";
7180 case DW_TAG_restrict_type:
7181 return "DW_TAG_restrict_type";
7182 case DW_TAG_interface_type:
7183 return "DW_TAG_interface_type";
7184 case DW_TAG_namespace:
7185 return "DW_TAG_namespace";
7186 case DW_TAG_imported_module:
7187 return "DW_TAG_imported_module";
7188 case DW_TAG_unspecified_type:
7189 return "DW_TAG_unspecified_type";
7190 case DW_TAG_partial_unit:
7191 return "DW_TAG_partial_unit";
7192 case DW_TAG_imported_unit:
7193 return "DW_TAG_imported_unit";
7194 case DW_TAG_MIPS_loop:
7195 return "DW_TAG_MIPS_loop";
7196 case DW_TAG_format_label:
7197 return "DW_TAG_format_label";
7198 case DW_TAG_function_template:
7199 return "DW_TAG_function_template";
7200 case DW_TAG_class_template:
7201 return "DW_TAG_class_template";
7203 return "DW_TAG_<unknown>";
7207 /* Convert a DWARF attribute code into its string name. */
7210 dwarf_attr_name (unsigned attr)
7215 return "DW_AT_sibling";
7216 case DW_AT_location:
7217 return "DW_AT_location";
7219 return "DW_AT_name";
7220 case DW_AT_ordering:
7221 return "DW_AT_ordering";
7222 case DW_AT_subscr_data:
7223 return "DW_AT_subscr_data";
7224 case DW_AT_byte_size:
7225 return "DW_AT_byte_size";
7226 case DW_AT_bit_offset:
7227 return "DW_AT_bit_offset";
7228 case DW_AT_bit_size:
7229 return "DW_AT_bit_size";
7230 case DW_AT_element_list:
7231 return "DW_AT_element_list";
7232 case DW_AT_stmt_list:
7233 return "DW_AT_stmt_list";
7235 return "DW_AT_low_pc";
7237 return "DW_AT_high_pc";
7238 case DW_AT_language:
7239 return "DW_AT_language";
7241 return "DW_AT_member";
7243 return "DW_AT_discr";
7244 case DW_AT_discr_value:
7245 return "DW_AT_discr_value";
7246 case DW_AT_visibility:
7247 return "DW_AT_visibility";
7249 return "DW_AT_import";
7250 case DW_AT_string_length:
7251 return "DW_AT_string_length";
7252 case DW_AT_common_reference:
7253 return "DW_AT_common_reference";
7254 case DW_AT_comp_dir:
7255 return "DW_AT_comp_dir";
7256 case DW_AT_const_value:
7257 return "DW_AT_const_value";
7258 case DW_AT_containing_type:
7259 return "DW_AT_containing_type";
7260 case DW_AT_default_value:
7261 return "DW_AT_default_value";
7263 return "DW_AT_inline";
7264 case DW_AT_is_optional:
7265 return "DW_AT_is_optional";
7266 case DW_AT_lower_bound:
7267 return "DW_AT_lower_bound";
7268 case DW_AT_producer:
7269 return "DW_AT_producer";
7270 case DW_AT_prototyped:
7271 return "DW_AT_prototyped";
7272 case DW_AT_return_addr:
7273 return "DW_AT_return_addr";
7274 case DW_AT_start_scope:
7275 return "DW_AT_start_scope";
7276 case DW_AT_stride_size:
7277 return "DW_AT_stride_size";
7278 case DW_AT_upper_bound:
7279 return "DW_AT_upper_bound";
7280 case DW_AT_abstract_origin:
7281 return "DW_AT_abstract_origin";
7282 case DW_AT_accessibility:
7283 return "DW_AT_accessibility";
7284 case DW_AT_address_class:
7285 return "DW_AT_address_class";
7286 case DW_AT_artificial:
7287 return "DW_AT_artificial";
7288 case DW_AT_base_types:
7289 return "DW_AT_base_types";
7290 case DW_AT_calling_convention:
7291 return "DW_AT_calling_convention";
7293 return "DW_AT_count";
7294 case DW_AT_data_member_location:
7295 return "DW_AT_data_member_location";
7296 case DW_AT_decl_column:
7297 return "DW_AT_decl_column";
7298 case DW_AT_decl_file:
7299 return "DW_AT_decl_file";
7300 case DW_AT_decl_line:
7301 return "DW_AT_decl_line";
7302 case DW_AT_declaration:
7303 return "DW_AT_declaration";
7304 case DW_AT_discr_list:
7305 return "DW_AT_discr_list";
7306 case DW_AT_encoding:
7307 return "DW_AT_encoding";
7308 case DW_AT_external:
7309 return "DW_AT_external";
7310 case DW_AT_frame_base:
7311 return "DW_AT_frame_base";
7313 return "DW_AT_friend";
7314 case DW_AT_identifier_case:
7315 return "DW_AT_identifier_case";
7316 case DW_AT_macro_info:
7317 return "DW_AT_macro_info";
7318 case DW_AT_namelist_items:
7319 return "DW_AT_namelist_items";
7320 case DW_AT_priority:
7321 return "DW_AT_priority";
7323 return "DW_AT_segment";
7324 case DW_AT_specification:
7325 return "DW_AT_specification";
7326 case DW_AT_static_link:
7327 return "DW_AT_static_link";
7329 return "DW_AT_type";
7330 case DW_AT_use_location:
7331 return "DW_AT_use_location";
7332 case DW_AT_variable_parameter:
7333 return "DW_AT_variable_parameter";
7334 case DW_AT_virtuality:
7335 return "DW_AT_virtuality";
7336 case DW_AT_vtable_elem_location:
7337 return "DW_AT_vtable_elem_location";
7338 case DW_AT_allocated:
7339 return "DW_AT_allocated";
7340 case DW_AT_associated:
7341 return "DW_AT_associated";
7342 case DW_AT_data_location:
7343 return "DW_AT_data_location";
7345 return "DW_AT_stride";
7346 case DW_AT_entry_pc:
7347 return "DW_AT_entry_pc";
7348 case DW_AT_use_UTF8:
7349 return "DW_AT_use_UTF8";
7350 case DW_AT_extension:
7351 return "DW_AT_extension";
7353 return "DW_AT_ranges";
7354 case DW_AT_trampoline:
7355 return "DW_AT_trampoline";
7356 case DW_AT_call_column:
7357 return "DW_AT_call_column";
7358 case DW_AT_call_file:
7359 return "DW_AT_call_file";
7360 case DW_AT_call_line:
7361 return "DW_AT_call_line";
7363 case DW_AT_MIPS_fde:
7364 return "DW_AT_MIPS_fde";
7365 case DW_AT_MIPS_loop_begin:
7366 return "DW_AT_MIPS_loop_begin";
7367 case DW_AT_MIPS_tail_loop_begin:
7368 return "DW_AT_MIPS_tail_loop_begin";
7369 case DW_AT_MIPS_epilog_begin:
7370 return "DW_AT_MIPS_epilog_begin";
7371 case DW_AT_MIPS_loop_unroll_factor:
7372 return "DW_AT_MIPS_loop_unroll_factor";
7373 case DW_AT_MIPS_software_pipeline_depth:
7374 return "DW_AT_MIPS_software_pipeline_depth";
7376 case DW_AT_MIPS_linkage_name:
7377 return "DW_AT_MIPS_linkage_name";
7379 case DW_AT_sf_names:
7380 return "DW_AT_sf_names";
7381 case DW_AT_src_info:
7382 return "DW_AT_src_info";
7383 case DW_AT_mac_info:
7384 return "DW_AT_mac_info";
7385 case DW_AT_src_coords:
7386 return "DW_AT_src_coords";
7387 case DW_AT_body_begin:
7388 return "DW_AT_body_begin";
7389 case DW_AT_body_end:
7390 return "DW_AT_body_end";
7391 case DW_AT_GNU_vector:
7392 return "DW_AT_GNU_vector";
7394 return "DW_AT_<unknown>";
7398 /* Convert a DWARF value form code into its string name. */
7401 dwarf_form_name (unsigned form)
7406 return "DW_FORM_addr";
7407 case DW_FORM_block2:
7408 return "DW_FORM_block2";
7409 case DW_FORM_block4:
7410 return "DW_FORM_block4";
7412 return "DW_FORM_data2";
7414 return "DW_FORM_data4";
7416 return "DW_FORM_data8";
7417 case DW_FORM_string:
7418 return "DW_FORM_string";
7420 return "DW_FORM_block";
7421 case DW_FORM_block1:
7422 return "DW_FORM_block1";
7424 return "DW_FORM_data1";
7426 return "DW_FORM_flag";
7428 return "DW_FORM_sdata";
7430 return "DW_FORM_strp";
7432 return "DW_FORM_udata";
7433 case DW_FORM_ref_addr:
7434 return "DW_FORM_ref_addr";
7436 return "DW_FORM_ref1";
7438 return "DW_FORM_ref2";
7440 return "DW_FORM_ref4";
7442 return "DW_FORM_ref8";
7443 case DW_FORM_ref_udata:
7444 return "DW_FORM_ref_udata";
7445 case DW_FORM_indirect:
7446 return "DW_FORM_indirect";
7448 return "DW_FORM_<unknown>";
7452 /* Convert a DWARF stack opcode into its string name. */
7455 dwarf_stack_op_name (unsigned op)
7460 return "DW_OP_addr";
7462 return "DW_OP_deref";
7464 return "DW_OP_const1u";
7466 return "DW_OP_const1s";
7468 return "DW_OP_const2u";
7470 return "DW_OP_const2s";
7472 return "DW_OP_const4u";
7474 return "DW_OP_const4s";
7476 return "DW_OP_const8u";
7478 return "DW_OP_const8s";
7480 return "DW_OP_constu";
7482 return "DW_OP_consts";
7486 return "DW_OP_drop";
7488 return "DW_OP_over";
7490 return "DW_OP_pick";
7492 return "DW_OP_swap";
7496 return "DW_OP_xderef";
7504 return "DW_OP_minus";
7516 return "DW_OP_plus";
7517 case DW_OP_plus_uconst:
7518 return "DW_OP_plus_uconst";
7524 return "DW_OP_shra";
7542 return "DW_OP_skip";
7544 return "DW_OP_lit0";
7546 return "DW_OP_lit1";
7548 return "DW_OP_lit2";
7550 return "DW_OP_lit3";
7552 return "DW_OP_lit4";
7554 return "DW_OP_lit5";
7556 return "DW_OP_lit6";
7558 return "DW_OP_lit7";
7560 return "DW_OP_lit8";
7562 return "DW_OP_lit9";
7564 return "DW_OP_lit10";
7566 return "DW_OP_lit11";
7568 return "DW_OP_lit12";
7570 return "DW_OP_lit13";
7572 return "DW_OP_lit14";
7574 return "DW_OP_lit15";
7576 return "DW_OP_lit16";
7578 return "DW_OP_lit17";
7580 return "DW_OP_lit18";
7582 return "DW_OP_lit19";
7584 return "DW_OP_lit20";
7586 return "DW_OP_lit21";
7588 return "DW_OP_lit22";
7590 return "DW_OP_lit23";
7592 return "DW_OP_lit24";
7594 return "DW_OP_lit25";
7596 return "DW_OP_lit26";
7598 return "DW_OP_lit27";
7600 return "DW_OP_lit28";
7602 return "DW_OP_lit29";
7604 return "DW_OP_lit30";
7606 return "DW_OP_lit31";
7608 return "DW_OP_reg0";
7610 return "DW_OP_reg1";
7612 return "DW_OP_reg2";
7614 return "DW_OP_reg3";
7616 return "DW_OP_reg4";
7618 return "DW_OP_reg5";
7620 return "DW_OP_reg6";
7622 return "DW_OP_reg7";
7624 return "DW_OP_reg8";
7626 return "DW_OP_reg9";
7628 return "DW_OP_reg10";
7630 return "DW_OP_reg11";
7632 return "DW_OP_reg12";
7634 return "DW_OP_reg13";
7636 return "DW_OP_reg14";
7638 return "DW_OP_reg15";
7640 return "DW_OP_reg16";
7642 return "DW_OP_reg17";
7644 return "DW_OP_reg18";
7646 return "DW_OP_reg19";
7648 return "DW_OP_reg20";
7650 return "DW_OP_reg21";
7652 return "DW_OP_reg22";
7654 return "DW_OP_reg23";
7656 return "DW_OP_reg24";
7658 return "DW_OP_reg25";
7660 return "DW_OP_reg26";
7662 return "DW_OP_reg27";
7664 return "DW_OP_reg28";
7666 return "DW_OP_reg29";
7668 return "DW_OP_reg30";
7670 return "DW_OP_reg31";
7672 return "DW_OP_breg0";
7674 return "DW_OP_breg1";
7676 return "DW_OP_breg2";
7678 return "DW_OP_breg3";
7680 return "DW_OP_breg4";
7682 return "DW_OP_breg5";
7684 return "DW_OP_breg6";
7686 return "DW_OP_breg7";
7688 return "DW_OP_breg8";
7690 return "DW_OP_breg9";
7692 return "DW_OP_breg10";
7694 return "DW_OP_breg11";
7696 return "DW_OP_breg12";
7698 return "DW_OP_breg13";
7700 return "DW_OP_breg14";
7702 return "DW_OP_breg15";
7704 return "DW_OP_breg16";
7706 return "DW_OP_breg17";
7708 return "DW_OP_breg18";
7710 return "DW_OP_breg19";
7712 return "DW_OP_breg20";
7714 return "DW_OP_breg21";
7716 return "DW_OP_breg22";
7718 return "DW_OP_breg23";
7720 return "DW_OP_breg24";
7722 return "DW_OP_breg25";
7724 return "DW_OP_breg26";
7726 return "DW_OP_breg27";
7728 return "DW_OP_breg28";
7730 return "DW_OP_breg29";
7732 return "DW_OP_breg30";
7734 return "DW_OP_breg31";
7736 return "DW_OP_regx";
7738 return "DW_OP_fbreg";
7740 return "DW_OP_bregx";
7742 return "DW_OP_piece";
7743 case DW_OP_deref_size:
7744 return "DW_OP_deref_size";
7745 case DW_OP_xderef_size:
7746 return "DW_OP_xderef_size";
7749 /* DWARF 3 extensions. */
7750 case DW_OP_push_object_address:
7751 return "DW_OP_push_object_address";
7753 return "DW_OP_call2";
7755 return "DW_OP_call4";
7756 case DW_OP_call_ref:
7757 return "DW_OP_call_ref";
7758 /* GNU extensions. */
7759 case DW_OP_GNU_push_tls_address:
7760 return "DW_OP_GNU_push_tls_address";
7762 return "OP_<unknown>";
7767 dwarf_bool_name (unsigned mybool)
7775 /* Convert a DWARF type code into its string name. */
7778 dwarf_type_encoding_name (unsigned enc)
7782 case DW_ATE_address:
7783 return "DW_ATE_address";
7784 case DW_ATE_boolean:
7785 return "DW_ATE_boolean";
7786 case DW_ATE_complex_float:
7787 return "DW_ATE_complex_float";
7789 return "DW_ATE_float";
7791 return "DW_ATE_signed";
7792 case DW_ATE_signed_char:
7793 return "DW_ATE_signed_char";
7794 case DW_ATE_unsigned:
7795 return "DW_ATE_unsigned";
7796 case DW_ATE_unsigned_char:
7797 return "DW_ATE_unsigned_char";
7798 case DW_ATE_imaginary_float:
7799 return "DW_ATE_imaginary_float";
7801 return "DW_ATE_<unknown>";
7805 /* Convert a DWARF call frame info operation to its string name. */
7809 dwarf_cfi_name (unsigned cfi_opc)
7813 case DW_CFA_advance_loc:
7814 return "DW_CFA_advance_loc";
7816 return "DW_CFA_offset";
7817 case DW_CFA_restore:
7818 return "DW_CFA_restore";
7820 return "DW_CFA_nop";
7821 case DW_CFA_set_loc:
7822 return "DW_CFA_set_loc";
7823 case DW_CFA_advance_loc1:
7824 return "DW_CFA_advance_loc1";
7825 case DW_CFA_advance_loc2:
7826 return "DW_CFA_advance_loc2";
7827 case DW_CFA_advance_loc4:
7828 return "DW_CFA_advance_loc4";
7829 case DW_CFA_offset_extended:
7830 return "DW_CFA_offset_extended";
7831 case DW_CFA_restore_extended:
7832 return "DW_CFA_restore_extended";
7833 case DW_CFA_undefined:
7834 return "DW_CFA_undefined";
7835 case DW_CFA_same_value:
7836 return "DW_CFA_same_value";
7837 case DW_CFA_register:
7838 return "DW_CFA_register";
7839 case DW_CFA_remember_state:
7840 return "DW_CFA_remember_state";
7841 case DW_CFA_restore_state:
7842 return "DW_CFA_restore_state";
7843 case DW_CFA_def_cfa:
7844 return "DW_CFA_def_cfa";
7845 case DW_CFA_def_cfa_register:
7846 return "DW_CFA_def_cfa_register";
7847 case DW_CFA_def_cfa_offset:
7848 return "DW_CFA_def_cfa_offset";
7851 case DW_CFA_def_cfa_expression:
7852 return "DW_CFA_def_cfa_expression";
7853 case DW_CFA_expression:
7854 return "DW_CFA_expression";
7855 case DW_CFA_offset_extended_sf:
7856 return "DW_CFA_offset_extended_sf";
7857 case DW_CFA_def_cfa_sf:
7858 return "DW_CFA_def_cfa_sf";
7859 case DW_CFA_def_cfa_offset_sf:
7860 return "DW_CFA_def_cfa_offset_sf";
7862 /* SGI/MIPS specific */
7863 case DW_CFA_MIPS_advance_loc8:
7864 return "DW_CFA_MIPS_advance_loc8";
7866 /* GNU extensions */
7867 case DW_CFA_GNU_window_save:
7868 return "DW_CFA_GNU_window_save";
7869 case DW_CFA_GNU_args_size:
7870 return "DW_CFA_GNU_args_size";
7871 case DW_CFA_GNU_negative_offset_extended:
7872 return "DW_CFA_GNU_negative_offset_extended";
7875 return "DW_CFA_<unknown>";
7881 dump_die (struct die_info *die)
7885 fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
7886 dwarf_tag_name (die->tag), die->abbrev, die->offset);
7887 fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
7888 dwarf_bool_name (die->child != NULL));
7890 fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
7891 for (i = 0; i < die->num_attrs; ++i)
7893 fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
7894 dwarf_attr_name (die->attrs[i].name),
7895 dwarf_form_name (die->attrs[i].form));
7896 switch (die->attrs[i].form)
7898 case DW_FORM_ref_addr:
7900 fprintf_unfiltered (gdb_stderr, "address: ");
7901 print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
7903 case DW_FORM_block2:
7904 case DW_FORM_block4:
7906 case DW_FORM_block1:
7907 fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
7918 fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
7920 case DW_FORM_string:
7922 fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
7923 DW_STRING (&die->attrs[i])
7924 ? DW_STRING (&die->attrs[i]) : "");
7927 if (DW_UNSND (&die->attrs[i]))
7928 fprintf_unfiltered (gdb_stderr, "flag: TRUE");
7930 fprintf_unfiltered (gdb_stderr, "flag: FALSE");
7932 case DW_FORM_indirect:
7933 /* the reader will have reduced the indirect form to
7934 the "base form" so this form should not occur */
7935 fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
7938 fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
7939 die->attrs[i].form);
7941 fprintf_unfiltered (gdb_stderr, "\n");
7946 dump_die_list (struct die_info *die)
7951 if (die->child != NULL)
7952 dump_die_list (die->child);
7953 if (die->sibling != NULL)
7954 dump_die_list (die->sibling);
7959 store_in_ref_table (unsigned int offset, struct die_info *die)
7962 struct die_info *old;
7964 h = (offset % REF_HASH_SIZE);
7965 old = die_ref_table[h];
7966 die->next_ref = old;
7967 die_ref_table[h] = die;
7972 dwarf2_empty_hash_tables (void)
7974 memset (die_ref_table, 0, sizeof (die_ref_table));
7978 dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu)
7980 unsigned int result = 0;
7984 case DW_FORM_ref_addr:
7985 result = DW_ADDR (attr);
7991 case DW_FORM_ref_udata:
7992 result = cu->header.offset + DW_UNSND (attr);
7995 complaint (&symfile_complaints,
7996 "unsupported die ref attribute form: '%s'",
7997 dwarf_form_name (attr->form));
8002 /* Return the constant value held by the given attribute. Return -1
8003 if the value held by the attribute is not constant. */
8006 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
8008 if (attr->form == DW_FORM_sdata)
8009 return DW_SND (attr);
8010 else if (attr->form == DW_FORM_udata
8011 || attr->form == DW_FORM_data1
8012 || attr->form == DW_FORM_data2
8013 || attr->form == DW_FORM_data4
8014 || attr->form == DW_FORM_data8)
8015 return DW_UNSND (attr);
8018 complaint (&symfile_complaints, "Attribute value is not a constant (%s)",
8019 dwarf_form_name (attr->form));
8020 return default_value;
8024 static struct die_info *
8025 follow_die_ref (unsigned int offset)
8027 struct die_info *die;
8030 h = (offset % REF_HASH_SIZE);
8031 die = die_ref_table[h];
8034 if (die->offset == offset)
8038 die = die->next_ref;
8043 static struct type *
8044 dwarf2_fundamental_type (struct objfile *objfile, int typeid,
8045 struct dwarf2_cu *cu)
8047 if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
8049 error ("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]",
8050 typeid, objfile->name);
8053 /* Look for this particular type in the fundamental type vector. If
8054 one is not found, create and install one appropriate for the
8055 current language and the current target machine. */
8057 if (cu->ftypes[typeid] == NULL)
8059 cu->ftypes[typeid] = cu->language_defn->la_fund_type (objfile, typeid);
8062 return (cu->ftypes[typeid]);
8065 /* Decode simple location descriptions.
8066 Given a pointer to a dwarf block that defines a location, compute
8067 the location and return the value.
8069 NOTE drow/2003-11-18: This function is called in two situations
8070 now: for the address of static or global variables (partial symbols
8071 only) and for offsets into structures which are expected to be
8072 (more or less) constant. The partial symbol case should go away,
8073 and only the constant case should remain. That will let this
8074 function complain more accurately. A few special modes are allowed
8075 without complaint for global variables (for instance, global
8076 register values and thread-local values).
8078 A location description containing no operations indicates that the
8079 object is optimized out. The return value is 0 for that case.
8080 FIXME drow/2003-11-16: No callers check for this case any more; soon all
8081 callers will only want a very basic result and this can become a
8084 When the result is a register number, the global isreg flag is set,
8085 otherwise it is cleared.
8087 Note that stack[0] is unused except as a default error return.
8088 Note that stack overflow is not yet handled. */
8091 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
8093 struct objfile *objfile = cu->objfile;
8094 struct comp_unit_head *cu_header = &cu->header;
8096 int size = blk->size;
8097 char *data = blk->data;
8098 CORE_ADDR stack[64];
8100 unsigned int bytes_read, unsnd;
8145 stack[++stacki] = op - DW_OP_lit0;
8181 stack[++stacki] = op - DW_OP_reg0;
8183 dwarf2_complex_location_expr_complaint ();
8188 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
8190 stack[++stacki] = unsnd;
8192 dwarf2_complex_location_expr_complaint ();
8196 stack[++stacki] = read_address (objfile->obfd, &data[i],
8202 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
8207 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
8212 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
8217 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
8222 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
8227 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
8232 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
8238 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
8243 stack[stacki + 1] = stack[stacki];
8248 stack[stacki - 1] += stack[stacki];
8252 case DW_OP_plus_uconst:
8253 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
8258 stack[stacki - 1] -= stack[stacki];
8263 /* If we're not the last op, then we definitely can't encode
8264 this using GDB's address_class enum. This is valid for partial
8265 global symbols, although the variable's address will be bogus
8268 dwarf2_complex_location_expr_complaint ();
8271 case DW_OP_GNU_push_tls_address:
8272 /* The top of the stack has the offset from the beginning
8273 of the thread control block at which the variable is located. */
8274 /* Nothing should follow this operator, so the top of stack would
8276 /* This is valid for partial global symbols, but the variable's
8277 address will be bogus in the psymtab. */
8279 dwarf2_complex_location_expr_complaint ();
8283 complaint (&symfile_complaints, "unsupported stack op: '%s'",
8284 dwarf_stack_op_name (op));
8285 return (stack[stacki]);
8288 return (stack[stacki]);
8291 /* memory allocation interface */
8293 static struct dwarf_block *
8294 dwarf_alloc_block (struct dwarf2_cu *cu)
8296 struct dwarf_block *blk;
8298 blk = (struct dwarf_block *)
8299 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
8303 static struct abbrev_info *
8304 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
8306 struct abbrev_info *abbrev;
8308 abbrev = (struct abbrev_info *)
8309 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
8310 memset (abbrev, 0, sizeof (struct abbrev_info));
8314 static struct die_info *
8315 dwarf_alloc_die (void)
8317 struct die_info *die;
8319 die = (struct die_info *) xmalloc (sizeof (struct die_info));
8320 memset (die, 0, sizeof (struct die_info));
8325 /* Macro support. */
8328 /* Return the full name of file number I in *LH's file name table.
8329 Use COMP_DIR as the name of the current directory of the
8330 compilation. The result is allocated using xmalloc; the caller is
8331 responsible for freeing it. */
8333 file_full_name (int file, struct line_header *lh, const char *comp_dir)
8335 struct file_entry *fe = &lh->file_names[file - 1];
8337 if (IS_ABSOLUTE_PATH (fe->name))
8338 return xstrdup (fe->name);
8346 dir = lh->include_dirs[fe->dir_index - 1];
8352 dir_len = strlen (dir);
8353 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
8354 strcpy (full_name, dir);
8355 full_name[dir_len] = '/';
8356 strcpy (full_name + dir_len + 1, fe->name);
8360 return xstrdup (fe->name);
8365 static struct macro_source_file *
8366 macro_start_file (int file, int line,
8367 struct macro_source_file *current_file,
8368 const char *comp_dir,
8369 struct line_header *lh, struct objfile *objfile)
8371 /* The full name of this source file. */
8372 char *full_name = file_full_name (file, lh, comp_dir);
8374 /* We don't create a macro table for this compilation unit
8375 at all until we actually get a filename. */
8376 if (! pending_macros)
8377 pending_macros = new_macro_table (&objfile->objfile_obstack,
8378 objfile->macro_cache);
8381 /* If we have no current file, then this must be the start_file
8382 directive for the compilation unit's main source file. */
8383 current_file = macro_set_main (pending_macros, full_name);
8385 current_file = macro_include (current_file, line, full_name);
8389 return current_file;
8393 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
8394 followed by a null byte. */
8396 copy_string (const char *buf, int len)
8398 char *s = xmalloc (len + 1);
8399 memcpy (s, buf, len);
8407 consume_improper_spaces (const char *p, const char *body)
8411 complaint (&symfile_complaints,
8412 "macro definition contains spaces in formal argument list:\n`%s'",
8424 parse_macro_definition (struct macro_source_file *file, int line,
8429 /* The body string takes one of two forms. For object-like macro
8430 definitions, it should be:
8432 <macro name> " " <definition>
8434 For function-like macro definitions, it should be:
8436 <macro name> "() " <definition>
8438 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
8440 Spaces may appear only where explicitly indicated, and in the
8443 The Dwarf 2 spec says that an object-like macro's name is always
8444 followed by a space, but versions of GCC around March 2002 omit
8445 the space when the macro's definition is the empty string.
8447 The Dwarf 2 spec says that there should be no spaces between the
8448 formal arguments in a function-like macro's formal argument list,
8449 but versions of GCC around March 2002 include spaces after the
8453 /* Find the extent of the macro name. The macro name is terminated
8454 by either a space or null character (for an object-like macro) or
8455 an opening paren (for a function-like macro). */
8456 for (p = body; *p; p++)
8457 if (*p == ' ' || *p == '(')
8460 if (*p == ' ' || *p == '\0')
8462 /* It's an object-like macro. */
8463 int name_len = p - body;
8464 char *name = copy_string (body, name_len);
8465 const char *replacement;
8468 replacement = body + name_len + 1;
8471 dwarf2_macro_malformed_definition_complaint (body);
8472 replacement = body + name_len;
8475 macro_define_object (file, line, name, replacement);
8481 /* It's a function-like macro. */
8482 char *name = copy_string (body, p - body);
8485 char **argv = xmalloc (argv_size * sizeof (*argv));
8489 p = consume_improper_spaces (p, body);
8491 /* Parse the formal argument list. */
8492 while (*p && *p != ')')
8494 /* Find the extent of the current argument name. */
8495 const char *arg_start = p;
8497 while (*p && *p != ',' && *p != ')' && *p != ' ')
8500 if (! *p || p == arg_start)
8501 dwarf2_macro_malformed_definition_complaint (body);
8504 /* Make sure argv has room for the new argument. */
8505 if (argc >= argv_size)
8508 argv = xrealloc (argv, argv_size * sizeof (*argv));
8511 argv[argc++] = copy_string (arg_start, p - arg_start);
8514 p = consume_improper_spaces (p, body);
8516 /* Consume the comma, if present. */
8521 p = consume_improper_spaces (p, body);
8530 /* Perfectly formed definition, no complaints. */
8531 macro_define_function (file, line, name,
8532 argc, (const char **) argv,
8534 else if (*p == '\0')
8536 /* Complain, but do define it. */
8537 dwarf2_macro_malformed_definition_complaint (body);
8538 macro_define_function (file, line, name,
8539 argc, (const char **) argv,
8543 /* Just complain. */
8544 dwarf2_macro_malformed_definition_complaint (body);
8547 /* Just complain. */
8548 dwarf2_macro_malformed_definition_complaint (body);
8554 for (i = 0; i < argc; i++)
8560 dwarf2_macro_malformed_definition_complaint (body);
8565 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
8566 char *comp_dir, bfd *abfd,
8567 struct dwarf2_cu *cu)
8569 char *mac_ptr, *mac_end;
8570 struct macro_source_file *current_file = 0;
8572 if (dwarf2_per_objfile->macinfo_buffer == NULL)
8574 complaint (&symfile_complaints, "missing .debug_macinfo section");
8578 mac_ptr = dwarf2_per_objfile->macinfo_buffer + offset;
8579 mac_end = dwarf2_per_objfile->macinfo_buffer
8580 + dwarf2_per_objfile->macinfo_size;
8584 enum dwarf_macinfo_record_type macinfo_type;
8586 /* Do we at least have room for a macinfo type byte? */
8587 if (mac_ptr >= mac_end)
8589 dwarf2_macros_too_long_complaint ();
8593 macinfo_type = read_1_byte (abfd, mac_ptr);
8596 switch (macinfo_type)
8598 /* A zero macinfo type indicates the end of the macro
8603 case DW_MACINFO_define:
8604 case DW_MACINFO_undef:
8610 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
8611 mac_ptr += bytes_read;
8612 body = read_string (abfd, mac_ptr, &bytes_read);
8613 mac_ptr += bytes_read;
8616 complaint (&symfile_complaints,
8617 "debug info gives macro %s outside of any file: %s",
8619 DW_MACINFO_define ? "definition" : macinfo_type ==
8620 DW_MACINFO_undef ? "undefinition" :
8621 "something-or-other", body);
8624 if (macinfo_type == DW_MACINFO_define)
8625 parse_macro_definition (current_file, line, body);
8626 else if (macinfo_type == DW_MACINFO_undef)
8627 macro_undef (current_file, line, body);
8632 case DW_MACINFO_start_file:
8637 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
8638 mac_ptr += bytes_read;
8639 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
8640 mac_ptr += bytes_read;
8642 current_file = macro_start_file (file, line,
8643 current_file, comp_dir,
8648 case DW_MACINFO_end_file:
8650 complaint (&symfile_complaints,
8651 "macro debug info has an unmatched `close_file' directive");
8654 current_file = current_file->included_by;
8657 enum dwarf_macinfo_record_type next_type;
8659 /* GCC circa March 2002 doesn't produce the zero
8660 type byte marking the end of the compilation
8661 unit. Complain if it's not there, but exit no
8664 /* Do we at least have room for a macinfo type byte? */
8665 if (mac_ptr >= mac_end)
8667 dwarf2_macros_too_long_complaint ();
8671 /* We don't increment mac_ptr here, so this is just
8673 next_type = read_1_byte (abfd, mac_ptr);
8675 complaint (&symfile_complaints,
8676 "no terminating 0-type entry for macros in `.debug_macinfo' section");
8683 case DW_MACINFO_vendor_ext:
8689 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
8690 mac_ptr += bytes_read;
8691 string = read_string (abfd, mac_ptr, &bytes_read);
8692 mac_ptr += bytes_read;
8694 /* We don't recognize any vendor extensions. */
8701 /* Check if the attribute's form is a DW_FORM_block*
8702 if so return true else false. */
8704 attr_form_is_block (struct attribute *attr)
8706 return (attr == NULL ? 0 :
8707 attr->form == DW_FORM_block1
8708 || attr->form == DW_FORM_block2
8709 || attr->form == DW_FORM_block4
8710 || attr->form == DW_FORM_block);
8714 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
8715 struct dwarf2_cu *cu)
8717 if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
8719 struct dwarf2_loclist_baton *baton;
8721 baton = obstack_alloc (&cu->objfile->objfile_obstack,
8722 sizeof (struct dwarf2_loclist_baton));
8723 baton->objfile = cu->objfile;
8725 /* We don't know how long the location list is, but make sure we
8726 don't run off the edge of the section. */
8727 baton->size = dwarf2_per_objfile->loc_size - DW_UNSND (attr);
8728 baton->data = dwarf2_per_objfile->loc_buffer + DW_UNSND (attr);
8729 baton->base_address = cu->header.base_address;
8730 if (cu->header.base_known == 0)
8731 complaint (&symfile_complaints,
8732 "Location list used without specifying the CU base address.");
8734 SYMBOL_OPS (sym) = &dwarf2_loclist_funcs;
8735 SYMBOL_LOCATION_BATON (sym) = baton;
8739 struct dwarf2_locexpr_baton *baton;
8741 baton = obstack_alloc (&cu->objfile->objfile_obstack,
8742 sizeof (struct dwarf2_locexpr_baton));
8743 baton->objfile = cu->objfile;
8745 if (attr_form_is_block (attr))
8747 /* Note that we're just copying the block's data pointer
8748 here, not the actual data. We're still pointing into the
8749 info_buffer for SYM's objfile; right now we never release
8750 that buffer, but when we do clean up properly this may
8752 baton->size = DW_BLOCK (attr)->size;
8753 baton->data = DW_BLOCK (attr)->data;
8757 dwarf2_invalid_attrib_class_complaint ("location description",
8758 SYMBOL_NATURAL_NAME (sym));
8763 SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs;
8764 SYMBOL_LOCATION_BATON (sym) = baton;
8768 /* This cleanup function is passed the address of a dwarf2_cu on the stack
8769 when we're finished with it. We can't free the pointer itself, but
8770 release any associated storage.
8772 Only used during partial symbol parsing. */
8775 free_stack_comp_unit (void *data)
8777 struct dwarf2_cu *cu = data;
8779 obstack_free (&cu->comp_unit_obstack, NULL);
8780 cu->partial_dies = NULL;
8783 /* Allocation function for the libiberty hash table which uses an
8787 hashtab_obstack_allocate (void *data, size_t size, size_t count)
8789 unsigned int total = size * count;
8790 void *ptr = obstack_alloc ((struct obstack *) data, total);
8791 memset (ptr, 0, total);
8795 /* Trivial deallocation function for the libiberty splay tree and hash
8796 table - don't deallocate anything. Rely on later deletion of the
8800 dummy_obstack_deallocate (void *object, void *data)
8805 /* Trivial hash function for partial_die_info: the hash value of a DIE
8806 is its offset in .debug_info for this objfile. */
8809 partial_die_hash (const void *item)
8811 const struct partial_die_info *part_die = item;
8812 return part_die->offset;
8815 /* Trivial comparison function for partial_die_info structures: two DIEs
8816 are equal if they have the same offset. */
8819 partial_die_eq (const void *item_lhs, const void *item_rhs)
8821 const struct partial_die_info *part_die_lhs = item_lhs;
8822 const struct partial_die_info *part_die_rhs = item_rhs;
8823 return part_die_lhs->offset == part_die_rhs->offset;
8826 void _initialize_dwarf2_read (void);
8829 _initialize_dwarf2_read (void)
8831 dwarf2_objfile_data_key = register_objfile_data ();