1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
56 #include "gdb_string.h"
57 #include "gdb_assert.h"
58 #include <sys/types.h>
65 #define MAP_FAILED ((void *) -1)
70 /* .debug_info header for a compilation unit
71 Because of alignment constraints, this structure has padding and cannot
72 be mapped directly onto the beginning of the .debug_info section. */
73 typedef struct comp_unit_header
75 unsigned int length; /* length of the .debug_info
77 unsigned short version; /* version number -- 2 for DWARF
79 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
80 unsigned char addr_size; /* byte size of an address -- 4 */
83 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
86 /* .debug_line statement program prologue
87 Because of alignment constraints, this structure has padding and cannot
88 be mapped directly onto the beginning of the .debug_info section. */
89 typedef struct statement_prologue
91 unsigned int total_length; /* byte length of the statement
93 unsigned short version; /* version number -- 2 for DWARF
95 unsigned int prologue_length; /* # bytes between prologue &
97 unsigned char minimum_instruction_length; /* byte size of
99 unsigned char default_is_stmt; /* initial value of is_stmt
102 unsigned char line_range;
103 unsigned char opcode_base; /* number assigned to first special
105 unsigned char *standard_opcode_lengths;
109 /* When non-zero, dump DIEs after they are read in. */
110 static int dwarf2_die_debug = 0;
114 /* When set, the file that we're processing is known to have debugging
115 info for C++ namespaces. GCC 3.3.x did not produce this information,
116 but later versions do. */
118 static int processing_has_namespace_info;
120 static const struct objfile_data *dwarf2_objfile_data_key;
122 struct dwarf2_section_info
128 /* True if we have tried to read this section. */
132 struct dwarf2_per_objfile
134 struct dwarf2_section_info info;
135 struct dwarf2_section_info abbrev;
136 struct dwarf2_section_info line;
137 struct dwarf2_section_info loc;
138 struct dwarf2_section_info macinfo;
139 struct dwarf2_section_info str;
140 struct dwarf2_section_info ranges;
141 struct dwarf2_section_info types;
142 struct dwarf2_section_info frame;
143 struct dwarf2_section_info eh_frame;
146 struct objfile *objfile;
148 /* A list of all the compilation units. This is used to locate
149 the target compilation unit of a particular reference. */
150 struct dwarf2_per_cu_data **all_comp_units;
152 /* The number of compilation units in ALL_COMP_UNITS. */
155 /* A chain of compilation units that are currently read in, so that
156 they can be freed later. */
157 struct dwarf2_per_cu_data *read_in_chain;
159 /* A table mapping .debug_types signatures to its signatured_type entry.
160 This is NULL if the .debug_types section hasn't been read in yet. */
161 htab_t signatured_types;
163 /* A flag indicating wether this objfile has a section loaded at a
165 int has_section_at_zero;
168 static struct dwarf2_per_objfile *dwarf2_per_objfile;
170 /* names of the debugging sections */
172 /* Note that if the debugging section has been compressed, it might
173 have a name like .zdebug_info. */
175 #define INFO_SECTION "debug_info"
176 #define ABBREV_SECTION "debug_abbrev"
177 #define LINE_SECTION "debug_line"
178 #define LOC_SECTION "debug_loc"
179 #define MACINFO_SECTION "debug_macinfo"
180 #define STR_SECTION "debug_str"
181 #define RANGES_SECTION "debug_ranges"
182 #define TYPES_SECTION "debug_types"
183 #define FRAME_SECTION "debug_frame"
184 #define EH_FRAME_SECTION "eh_frame"
186 /* local data types */
188 /* We hold several abbreviation tables in memory at the same time. */
189 #ifndef ABBREV_HASH_SIZE
190 #define ABBREV_HASH_SIZE 121
193 /* The data in a compilation unit header, after target2host
194 translation, looks like this. */
195 struct comp_unit_head
199 unsigned char addr_size;
200 unsigned char signed_addr_p;
201 unsigned int abbrev_offset;
203 /* Size of file offsets; either 4 or 8. */
204 unsigned int offset_size;
206 /* Size of the length field; either 4 or 12. */
207 unsigned int initial_length_size;
209 /* Offset to the first byte of this compilation unit header in the
210 .debug_info section, for resolving relative reference dies. */
213 /* Offset to first die in this cu from the start of the cu.
214 This will be the first byte following the compilation unit header. */
215 unsigned int first_die_offset;
218 /* Internal state when decoding a particular compilation unit. */
221 /* The objfile containing this compilation unit. */
222 struct objfile *objfile;
224 /* The header of the compilation unit. */
225 struct comp_unit_head header;
227 /* Base address of this compilation unit. */
228 CORE_ADDR base_address;
230 /* Non-zero if base_address has been set. */
233 struct function_range *first_fn, *last_fn, *cached_fn;
235 /* The language we are debugging. */
236 enum language language;
237 const struct language_defn *language_defn;
239 const char *producer;
241 /* The generic symbol table building routines have separate lists for
242 file scope symbols and all all other scopes (local scopes). So
243 we need to select the right one to pass to add_symbol_to_list().
244 We do it by keeping a pointer to the correct list in list_in_scope.
246 FIXME: The original dwarf code just treated the file scope as the
247 first local scope, and all other local scopes as nested local
248 scopes, and worked fine. Check to see if we really need to
249 distinguish these in buildsym.c. */
250 struct pending **list_in_scope;
252 /* DWARF abbreviation table associated with this compilation unit. */
253 struct abbrev_info **dwarf2_abbrevs;
255 /* Storage for the abbrev table. */
256 struct obstack abbrev_obstack;
258 /* Hash table holding all the loaded partial DIEs. */
261 /* Storage for things with the same lifetime as this read-in compilation
262 unit, including partial DIEs. */
263 struct obstack comp_unit_obstack;
265 /* When multiple dwarf2_cu structures are living in memory, this field
266 chains them all together, so that they can be released efficiently.
267 We will probably also want a generation counter so that most-recently-used
268 compilation units are cached... */
269 struct dwarf2_per_cu_data *read_in_chain;
271 /* Backchain to our per_cu entry if the tree has been built. */
272 struct dwarf2_per_cu_data *per_cu;
274 /* Pointer to the die -> type map. Although it is stored
275 permanently in per_cu, we copy it here to avoid double
279 /* How many compilation units ago was this CU last referenced? */
282 /* A hash table of die offsets for following references. */
285 /* Full DIEs if read in. */
286 struct die_info *dies;
288 /* A set of pointers to dwarf2_per_cu_data objects for compilation
289 units referenced by this one. Only set during full symbol processing;
290 partial symbol tables do not have dependencies. */
293 /* Header data from the line table, during full symbol processing. */
294 struct line_header *line_header;
296 /* Mark used when releasing cached dies. */
297 unsigned int mark : 1;
299 /* This flag will be set if this compilation unit might include
300 inter-compilation-unit references. */
301 unsigned int has_form_ref_addr : 1;
303 /* This flag will be set if this compilation unit includes any
304 DW_TAG_namespace DIEs. If we know that there are explicit
305 DIEs for namespaces, we don't need to try to infer them
306 from mangled names. */
307 unsigned int has_namespace_info : 1;
310 /* Persistent data held for a compilation unit, even when not
311 processing it. We put a pointer to this structure in the
312 read_symtab_private field of the psymtab. If we encounter
313 inter-compilation-unit references, we also maintain a sorted
314 list of all compilation units. */
316 struct dwarf2_per_cu_data
318 /* The start offset and length of this compilation unit. 2**29-1
319 bytes should suffice to store the length of any compilation unit
320 - if it doesn't, GDB will fall over anyway.
321 NOTE: Unlike comp_unit_head.length, this length includes
322 initial_length_size. */
324 unsigned int length : 29;
326 /* Flag indicating this compilation unit will be read in before
327 any of the current compilation units are processed. */
328 unsigned int queued : 1;
330 /* This flag will be set if we need to load absolutely all DIEs
331 for this compilation unit, instead of just the ones we think
332 are interesting. It gets set if we look for a DIE in the
333 hash table and don't find it. */
334 unsigned int load_all_dies : 1;
336 /* Non-zero if this CU is from .debug_types.
337 Otherwise it's from .debug_info. */
338 unsigned int from_debug_types : 1;
340 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
341 of the CU cache it gets reset to NULL again. */
342 struct dwarf2_cu *cu;
344 /* If full symbols for this CU have been read in, then this field
345 holds a map of DIE offsets to types. It isn't always possible
346 to reconstruct this information later, so we have to preserve
350 /* The partial symbol table associated with this compilation unit,
351 or NULL for partial units (which do not have an associated
353 struct partial_symtab *psymtab;
356 /* Entry in the signatured_types hash table. */
358 struct signatured_type
362 /* Offset in .debug_types of the TU (type_unit) for this type. */
365 /* Offset in .debug_types of the type defined by this TU. */
366 unsigned int type_offset;
368 /* The CU(/TU) of this type. */
369 struct dwarf2_per_cu_data per_cu;
372 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
373 which are used for both .debug_info and .debug_types dies.
374 All parameters here are unchanging for the life of the call.
375 This struct exists to abstract away the constant parameters of
378 struct die_reader_specs
380 /* The bfd of this objfile. */
383 /* The CU of the DIE we are parsing. */
384 struct dwarf2_cu *cu;
386 /* Pointer to start of section buffer.
387 This is either the start of .debug_info or .debug_types. */
388 const gdb_byte *buffer;
391 /* The line number information for a compilation unit (found in the
392 .debug_line section) begins with a "statement program header",
393 which contains the following information. */
396 unsigned int total_length;
397 unsigned short version;
398 unsigned int header_length;
399 unsigned char minimum_instruction_length;
400 unsigned char maximum_ops_per_instruction;
401 unsigned char default_is_stmt;
403 unsigned char line_range;
404 unsigned char opcode_base;
406 /* standard_opcode_lengths[i] is the number of operands for the
407 standard opcode whose value is i. This means that
408 standard_opcode_lengths[0] is unused, and the last meaningful
409 element is standard_opcode_lengths[opcode_base - 1]. */
410 unsigned char *standard_opcode_lengths;
412 /* The include_directories table. NOTE! These strings are not
413 allocated with xmalloc; instead, they are pointers into
414 debug_line_buffer. If you try to free them, `free' will get
416 unsigned int num_include_dirs, include_dirs_size;
419 /* The file_names table. NOTE! These strings are not allocated
420 with xmalloc; instead, they are pointers into debug_line_buffer.
421 Don't try to free them directly. */
422 unsigned int num_file_names, file_names_size;
426 unsigned int dir_index;
427 unsigned int mod_time;
429 int included_p; /* Non-zero if referenced by the Line Number Program. */
430 struct symtab *symtab; /* The associated symbol table, if any. */
433 /* The start and end of the statement program following this
434 header. These point into dwarf2_per_objfile->line_buffer. */
435 gdb_byte *statement_program_start, *statement_program_end;
438 /* When we construct a partial symbol table entry we only
439 need this much information. */
440 struct partial_die_info
442 /* Offset of this DIE. */
445 /* DWARF-2 tag for this DIE. */
446 ENUM_BITFIELD(dwarf_tag) tag : 16;
448 /* Assorted flags describing the data found in this DIE. */
449 unsigned int has_children : 1;
450 unsigned int is_external : 1;
451 unsigned int is_declaration : 1;
452 unsigned int has_type : 1;
453 unsigned int has_specification : 1;
454 unsigned int has_pc_info : 1;
456 /* Flag set if the SCOPE field of this structure has been
458 unsigned int scope_set : 1;
460 /* Flag set if the DIE has a byte_size attribute. */
461 unsigned int has_byte_size : 1;
463 /* The name of this DIE. Normally the value of DW_AT_name, but
464 sometimes a default name for unnamed DIEs. */
467 /* The scope to prepend to our children. This is generally
468 allocated on the comp_unit_obstack, so will disappear
469 when this compilation unit leaves the cache. */
472 /* The location description associated with this DIE, if any. */
473 struct dwarf_block *locdesc;
475 /* If HAS_PC_INFO, the PC range associated with this DIE. */
479 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
480 DW_AT_sibling, if any. */
483 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
484 DW_AT_specification (or DW_AT_abstract_origin or
486 unsigned int spec_offset;
488 /* Pointers to this DIE's parent, first child, and next sibling,
490 struct partial_die_info *die_parent, *die_child, *die_sibling;
493 /* This data structure holds the information of an abbrev. */
496 unsigned int number; /* number identifying abbrev */
497 enum dwarf_tag tag; /* dwarf tag */
498 unsigned short has_children; /* boolean */
499 unsigned short num_attrs; /* number of attributes */
500 struct attr_abbrev *attrs; /* an array of attribute descriptions */
501 struct abbrev_info *next; /* next in chain */
506 ENUM_BITFIELD(dwarf_attribute) name : 16;
507 ENUM_BITFIELD(dwarf_form) form : 16;
510 /* Attributes have a name and a value */
513 ENUM_BITFIELD(dwarf_attribute) name : 16;
514 ENUM_BITFIELD(dwarf_form) form : 15;
516 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
517 field should be in u.str (existing only for DW_STRING) but it is kept
518 here for better struct attribute alignment. */
519 unsigned int string_is_canonical : 1;
524 struct dwarf_block *blk;
528 struct signatured_type *signatured_type;
533 /* This data structure holds a complete die structure. */
536 /* DWARF-2 tag for this DIE. */
537 ENUM_BITFIELD(dwarf_tag) tag : 16;
539 /* Number of attributes */
540 unsigned short num_attrs;
545 /* Offset in .debug_info or .debug_types section. */
548 /* The dies in a compilation unit form an n-ary tree. PARENT
549 points to this die's parent; CHILD points to the first child of
550 this node; and all the children of a given node are chained
551 together via their SIBLING fields, terminated by a die whose
553 struct die_info *child; /* Its first child, if any. */
554 struct die_info *sibling; /* Its next sibling, if any. */
555 struct die_info *parent; /* Its parent, if any. */
557 /* An array of attributes, with NUM_ATTRS elements. There may be
558 zero, but it's not common and zero-sized arrays are not
559 sufficiently portable C. */
560 struct attribute attrs[1];
563 struct function_range
566 CORE_ADDR lowpc, highpc;
568 struct function_range *next;
571 /* Get at parts of an attribute structure */
573 #define DW_STRING(attr) ((attr)->u.str)
574 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
575 #define DW_UNSND(attr) ((attr)->u.unsnd)
576 #define DW_BLOCK(attr) ((attr)->u.blk)
577 #define DW_SND(attr) ((attr)->u.snd)
578 #define DW_ADDR(attr) ((attr)->u.addr)
579 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
581 /* Blocks are a bunch of untyped bytes. */
588 #ifndef ATTR_ALLOC_CHUNK
589 #define ATTR_ALLOC_CHUNK 4
592 /* Allocate fields for structs, unions and enums in this size. */
593 #ifndef DW_FIELD_ALLOC_CHUNK
594 #define DW_FIELD_ALLOC_CHUNK 4
597 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
598 but this would require a corresponding change in unpack_field_as_long
600 static int bits_per_byte = 8;
602 /* The routines that read and process dies for a C struct or C++ class
603 pass lists of data member fields and lists of member function fields
604 in an instance of a field_info structure, as defined below. */
607 /* List of data member and baseclasses fields. */
610 struct nextfield *next;
615 *fields, *baseclasses;
617 /* Number of fields (including baseclasses). */
620 /* Number of baseclasses. */
623 /* Set if the accesibility of one of the fields is not public. */
624 int non_public_fields;
626 /* Member function fields array, entries are allocated in the order they
627 are encountered in the object file. */
630 struct nextfnfield *next;
631 struct fn_field fnfield;
635 /* Member function fieldlist array, contains name of possibly overloaded
636 member function, number of overloaded member functions and a pointer
637 to the head of the member function field chain. */
642 struct nextfnfield *head;
646 /* Number of entries in the fnfieldlists array. */
649 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
650 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
651 struct typedef_field_list
653 struct typedef_field field;
654 struct typedef_field_list *next;
657 unsigned typedef_field_list_count;
660 /* One item on the queue of compilation units to read in full symbols
662 struct dwarf2_queue_item
664 struct dwarf2_per_cu_data *per_cu;
665 struct dwarf2_queue_item *next;
668 /* The current queue. */
669 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
671 /* Loaded secondary compilation units are kept in memory until they
672 have not been referenced for the processing of this many
673 compilation units. Set this to zero to disable caching. Cache
674 sizes of up to at least twenty will improve startup time for
675 typical inter-CU-reference binaries, at an obvious memory cost. */
676 static int dwarf2_max_cache_age = 5;
678 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
679 struct cmd_list_element *c, const char *value)
681 fprintf_filtered (file, _("\
682 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
687 /* Various complaints about symbol reading that don't abort the process */
690 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
692 complaint (&symfile_complaints,
693 _("statement list doesn't fit in .debug_line section"));
697 dwarf2_debug_line_missing_file_complaint (void)
699 complaint (&symfile_complaints,
700 _(".debug_line section has line data without a file"));
704 dwarf2_debug_line_missing_end_sequence_complaint (void)
706 complaint (&symfile_complaints,
707 _(".debug_line section has line program sequence without an end"));
711 dwarf2_complex_location_expr_complaint (void)
713 complaint (&symfile_complaints, _("location expression too complex"));
717 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
720 complaint (&symfile_complaints,
721 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
726 dwarf2_macros_too_long_complaint (void)
728 complaint (&symfile_complaints,
729 _("macro info runs off end of `.debug_macinfo' section"));
733 dwarf2_macro_malformed_definition_complaint (const char *arg1)
735 complaint (&symfile_complaints,
736 _("macro debug info contains a malformed macro definition:\n`%s'"),
741 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
743 complaint (&symfile_complaints,
744 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
747 /* local function prototypes */
749 static void dwarf2_locate_sections (bfd *, asection *, void *);
751 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
754 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
756 struct partial_symtab *);
758 static void dwarf2_build_psymtabs_hard (struct objfile *);
760 static void scan_partial_symbols (struct partial_die_info *,
761 CORE_ADDR *, CORE_ADDR *,
762 int, struct dwarf2_cu *);
764 static void add_partial_symbol (struct partial_die_info *,
767 static void add_partial_namespace (struct partial_die_info *pdi,
768 CORE_ADDR *lowpc, CORE_ADDR *highpc,
769 int need_pc, struct dwarf2_cu *cu);
771 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
772 CORE_ADDR *highpc, int need_pc,
773 struct dwarf2_cu *cu);
775 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
776 struct dwarf2_cu *cu);
778 static void add_partial_subprogram (struct partial_die_info *pdi,
779 CORE_ADDR *lowpc, CORE_ADDR *highpc,
780 int need_pc, struct dwarf2_cu *cu);
782 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
783 gdb_byte *buffer, gdb_byte *info_ptr,
784 bfd *abfd, struct dwarf2_cu *cu);
786 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
788 static void psymtab_to_symtab_1 (struct partial_symtab *);
790 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
792 static void dwarf2_free_abbrev_table (void *);
794 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
797 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
800 static struct partial_die_info *load_partial_dies (bfd *,
801 gdb_byte *, gdb_byte *,
802 int, struct dwarf2_cu *);
804 static gdb_byte *read_partial_die (struct partial_die_info *,
805 struct abbrev_info *abbrev,
807 gdb_byte *, gdb_byte *,
810 static struct partial_die_info *find_partial_die (unsigned int,
813 static void fixup_partial_die (struct partial_die_info *,
816 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
817 bfd *, gdb_byte *, struct dwarf2_cu *);
819 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
820 bfd *, gdb_byte *, struct dwarf2_cu *);
822 static unsigned int read_1_byte (bfd *, gdb_byte *);
824 static int read_1_signed_byte (bfd *, gdb_byte *);
826 static unsigned int read_2_bytes (bfd *, gdb_byte *);
828 static unsigned int read_4_bytes (bfd *, gdb_byte *);
830 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
832 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
835 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
837 static LONGEST read_checked_initial_length_and_offset
838 (bfd *, gdb_byte *, const struct comp_unit_head *,
839 unsigned int *, unsigned int *);
841 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
844 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
846 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
848 static char *read_string (bfd *, gdb_byte *, unsigned int *);
850 static char *read_indirect_string (bfd *, gdb_byte *,
851 const struct comp_unit_head *,
854 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
856 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
858 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
860 static void set_cu_language (unsigned int, struct dwarf2_cu *);
862 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
865 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
869 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
870 struct dwarf2_cu *cu);
872 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
874 static struct die_info *die_specification (struct die_info *die,
875 struct dwarf2_cu **);
877 static void free_line_header (struct line_header *lh);
879 static void add_file_name (struct line_header *, char *, unsigned int,
880 unsigned int, unsigned int);
882 static struct line_header *(dwarf_decode_line_header
883 (unsigned int offset,
884 bfd *abfd, struct dwarf2_cu *cu));
886 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
887 struct dwarf2_cu *, struct partial_symtab *);
889 static void dwarf2_start_subfile (char *, char *, char *);
891 static struct symbol *new_symbol (struct die_info *, struct type *,
894 static void dwarf2_const_value (struct attribute *, struct symbol *,
897 static void dwarf2_const_value_data (struct attribute *attr,
901 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
903 static int need_gnat_info (struct dwarf2_cu *);
905 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
907 static void set_descriptive_type (struct type *, struct die_info *,
910 static struct type *die_containing_type (struct die_info *,
913 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
915 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
917 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
919 static char *typename_concat (struct obstack *obs, const char *prefix,
920 const char *suffix, int physname,
921 struct dwarf2_cu *cu);
923 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
925 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
927 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
929 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
931 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
932 struct dwarf2_cu *, struct partial_symtab *);
934 static int dwarf2_get_pc_bounds (struct die_info *,
935 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
936 struct partial_symtab *);
938 static void get_scope_pc_bounds (struct die_info *,
939 CORE_ADDR *, CORE_ADDR *,
942 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
943 CORE_ADDR, struct dwarf2_cu *);
945 static void dwarf2_add_field (struct field_info *, struct die_info *,
948 static void dwarf2_attach_fields_to_type (struct field_info *,
949 struct type *, struct dwarf2_cu *);
951 static void dwarf2_add_member_fn (struct field_info *,
952 struct die_info *, struct type *,
955 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
956 struct type *, struct dwarf2_cu *);
958 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
960 static void read_common_block (struct die_info *, struct dwarf2_cu *);
962 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
964 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
966 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
968 static struct type *read_module_type (struct die_info *die,
969 struct dwarf2_cu *cu);
971 static const char *namespace_name (struct die_info *die,
972 int *is_anonymous, struct dwarf2_cu *);
974 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
976 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
978 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
981 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
983 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
985 gdb_byte **new_info_ptr,
986 struct die_info *parent);
988 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
990 gdb_byte **new_info_ptr,
991 struct die_info *parent);
993 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
995 gdb_byte **new_info_ptr,
996 struct die_info *parent);
998 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
999 struct die_info **, gdb_byte *,
1002 static void process_die (struct die_info *, struct dwarf2_cu *);
1004 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1007 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1009 static struct die_info *dwarf2_extension (struct die_info *die,
1010 struct dwarf2_cu **);
1012 static char *dwarf_tag_name (unsigned int);
1014 static char *dwarf_attr_name (unsigned int);
1016 static char *dwarf_form_name (unsigned int);
1018 static char *dwarf_bool_name (unsigned int);
1020 static char *dwarf_type_encoding_name (unsigned int);
1023 static char *dwarf_cfi_name (unsigned int);
1026 static struct die_info *sibling_die (struct die_info *);
1028 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1030 static void dump_die_for_error (struct die_info *);
1032 static void dump_die_1 (struct ui_file *, int level, int max_level,
1035 /*static*/ void dump_die (struct die_info *, int max_level);
1037 static void store_in_ref_table (struct die_info *,
1038 struct dwarf2_cu *);
1040 static int is_ref_attr (struct attribute *);
1042 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1044 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1046 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1048 struct dwarf2_cu **);
1050 static struct die_info *follow_die_ref (struct die_info *,
1052 struct dwarf2_cu **);
1054 static struct die_info *follow_die_sig (struct die_info *,
1056 struct dwarf2_cu **);
1058 static void read_signatured_type_at_offset (struct objfile *objfile,
1059 unsigned int offset);
1061 static void read_signatured_type (struct objfile *,
1062 struct signatured_type *type_sig);
1064 /* memory allocation interface */
1066 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1068 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1070 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1072 static void initialize_cu_func_list (struct dwarf2_cu *);
1074 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1075 struct dwarf2_cu *);
1077 static void dwarf_decode_macros (struct line_header *, unsigned int,
1078 char *, bfd *, struct dwarf2_cu *);
1080 static int attr_form_is_block (struct attribute *);
1082 static int attr_form_is_section_offset (struct attribute *);
1084 static int attr_form_is_constant (struct attribute *);
1086 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1088 struct dwarf2_cu *cu);
1090 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1091 struct abbrev_info *abbrev,
1092 struct dwarf2_cu *cu);
1094 static void free_stack_comp_unit (void *);
1096 static hashval_t partial_die_hash (const void *item);
1098 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1100 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1101 (unsigned int offset, struct objfile *objfile);
1103 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1104 (unsigned int offset, struct objfile *objfile);
1106 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1108 static void free_one_comp_unit (void *);
1110 static void free_cached_comp_units (void *);
1112 static void age_cached_comp_units (void);
1114 static void free_one_cached_comp_unit (void *);
1116 static struct type *set_die_type (struct die_info *, struct type *,
1117 struct dwarf2_cu *);
1119 static void create_all_comp_units (struct objfile *);
1121 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1124 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1126 static void dwarf2_add_dependence (struct dwarf2_cu *,
1127 struct dwarf2_per_cu_data *);
1129 static void dwarf2_mark (struct dwarf2_cu *);
1131 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1133 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1135 /* Try to locate the sections we need for DWARF 2 debugging
1136 information and return true if we have enough to do something. */
1139 dwarf2_has_info (struct objfile *objfile)
1141 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1142 if (!dwarf2_per_objfile)
1144 /* Initialize per-objfile state. */
1145 struct dwarf2_per_objfile *data
1146 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1148 memset (data, 0, sizeof (*data));
1149 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1150 dwarf2_per_objfile = data;
1152 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1153 dwarf2_per_objfile->objfile = objfile;
1155 return (dwarf2_per_objfile->info.asection != NULL
1156 && dwarf2_per_objfile->abbrev.asection != NULL);
1159 /* When loading sections, we can either look for ".<name>", or for
1160 * ".z<name>", which indicates a compressed section. */
1163 section_is_p (const char *section_name, const char *name)
1165 return (section_name[0] == '.'
1166 && (strcmp (section_name + 1, name) == 0
1167 || (section_name[1] == 'z'
1168 && strcmp (section_name + 2, name) == 0)));
1171 /* This function is mapped across the sections and remembers the
1172 offset and size of each of the debugging sections we are interested
1176 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1178 if (section_is_p (sectp->name, INFO_SECTION))
1180 dwarf2_per_objfile->info.asection = sectp;
1181 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1183 else if (section_is_p (sectp->name, ABBREV_SECTION))
1185 dwarf2_per_objfile->abbrev.asection = sectp;
1186 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1188 else if (section_is_p (sectp->name, LINE_SECTION))
1190 dwarf2_per_objfile->line.asection = sectp;
1191 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1193 else if (section_is_p (sectp->name, LOC_SECTION))
1195 dwarf2_per_objfile->loc.asection = sectp;
1196 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1198 else if (section_is_p (sectp->name, MACINFO_SECTION))
1200 dwarf2_per_objfile->macinfo.asection = sectp;
1201 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1203 else if (section_is_p (sectp->name, STR_SECTION))
1205 dwarf2_per_objfile->str.asection = sectp;
1206 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1208 else if (section_is_p (sectp->name, FRAME_SECTION))
1210 dwarf2_per_objfile->frame.asection = sectp;
1211 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1213 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1215 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1217 if (aflag & SEC_HAS_CONTENTS)
1219 dwarf2_per_objfile->eh_frame.asection = sectp;
1220 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1223 else if (section_is_p (sectp->name, RANGES_SECTION))
1225 dwarf2_per_objfile->ranges.asection = sectp;
1226 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1228 else if (section_is_p (sectp->name, TYPES_SECTION))
1230 dwarf2_per_objfile->types.asection = sectp;
1231 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1234 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1235 && bfd_section_vma (abfd, sectp) == 0)
1236 dwarf2_per_objfile->has_section_at_zero = 1;
1239 /* Decompress a section that was compressed using zlib. Store the
1240 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1243 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1244 gdb_byte **outbuf, bfd_size_type *outsize)
1246 bfd *abfd = objfile->obfd;
1248 error (_("Support for zlib-compressed DWARF data (from '%s') "
1249 "is disabled in this copy of GDB"),
1250 bfd_get_filename (abfd));
1252 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1253 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1254 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1255 bfd_size_type uncompressed_size;
1256 gdb_byte *uncompressed_buffer;
1259 int header_size = 12;
1261 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1262 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1263 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1264 bfd_get_filename (abfd));
1266 /* Read the zlib header. In this case, it should be "ZLIB" followed
1267 by the uncompressed section size, 8 bytes in big-endian order. */
1268 if (compressed_size < header_size
1269 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1270 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1271 bfd_get_filename (abfd));
1272 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1273 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1274 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1275 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1276 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1277 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1278 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1279 uncompressed_size += compressed_buffer[11];
1281 /* It is possible the section consists of several compressed
1282 buffers concatenated together, so we uncompress in a loop. */
1286 strm.avail_in = compressed_size - header_size;
1287 strm.next_in = (Bytef*) compressed_buffer + header_size;
1288 strm.avail_out = uncompressed_size;
1289 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1291 rc = inflateInit (&strm);
1292 while (strm.avail_in > 0)
1295 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1296 bfd_get_filename (abfd), rc);
1297 strm.next_out = ((Bytef*) uncompressed_buffer
1298 + (uncompressed_size - strm.avail_out));
1299 rc = inflate (&strm, Z_FINISH);
1300 if (rc != Z_STREAM_END)
1301 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1302 bfd_get_filename (abfd), rc);
1303 rc = inflateReset (&strm);
1305 rc = inflateEnd (&strm);
1307 || strm.avail_out != 0)
1308 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1309 bfd_get_filename (abfd), rc);
1311 do_cleanups (cleanup);
1312 *outbuf = uncompressed_buffer;
1313 *outsize = uncompressed_size;
1317 /* Read the contents of the section SECTP from object file specified by
1318 OBJFILE, store info about the section into INFO.
1319 If the section is compressed, uncompress it before returning. */
1322 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1324 bfd *abfd = objfile->obfd;
1325 asection *sectp = info->asection;
1326 gdb_byte *buf, *retbuf;
1327 unsigned char header[4];
1331 info->buffer = NULL;
1332 info->was_mmapped = 0;
1335 if (info->asection == NULL || info->size == 0)
1338 /* Check if the file has a 4-byte header indicating compression. */
1339 if (info->size > sizeof (header)
1340 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1341 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1343 /* Upon decompression, update the buffer and its size. */
1344 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1346 zlib_decompress_section (objfile, sectp, &info->buffer,
1354 pagesize = getpagesize ();
1356 /* Only try to mmap sections which are large enough: we don't want to
1357 waste space due to fragmentation. Also, only try mmap for sections
1358 without relocations. */
1360 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1362 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1363 size_t map_length = info->size + sectp->filepos - pg_offset;
1364 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1365 MAP_PRIVATE, pg_offset);
1367 if (retbuf != MAP_FAILED)
1369 info->was_mmapped = 1;
1370 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1371 #if HAVE_POSIX_MADVISE
1372 posix_madvise (retbuf, map_length, POSIX_MADV_WILLNEED);
1379 /* If we get here, we are a normal, not-compressed section. */
1381 = obstack_alloc (&objfile->objfile_obstack, info->size);
1383 /* When debugging .o files, we may need to apply relocations; see
1384 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1385 We never compress sections in .o files, so we only need to
1386 try this when the section is not compressed. */
1387 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1390 info->buffer = retbuf;
1394 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1395 || bfd_bread (buf, info->size, abfd) != info->size)
1396 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1397 bfd_get_filename (abfd));
1400 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1404 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1405 asection **sectp, gdb_byte **bufp,
1406 bfd_size_type *sizep)
1408 struct dwarf2_per_objfile *data
1409 = objfile_data (objfile, dwarf2_objfile_data_key);
1410 struct dwarf2_section_info *info;
1412 /* We may see an objfile without any DWARF, in which case we just
1421 if (section_is_p (section_name, EH_FRAME_SECTION))
1422 info = &data->eh_frame;
1423 else if (section_is_p (section_name, FRAME_SECTION))
1424 info = &data->frame;
1428 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1429 /* We haven't read this section in yet. Do it now. */
1430 dwarf2_read_section (objfile, info);
1432 *sectp = info->asection;
1433 *bufp = info->buffer;
1434 *sizep = info->size;
1437 /* Build a partial symbol table. */
1440 dwarf2_build_psymtabs (struct objfile *objfile)
1442 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
1444 init_psymbol_list (objfile, 1024);
1447 dwarf2_build_psymtabs_hard (objfile);
1450 /* Return TRUE if OFFSET is within CU_HEADER. */
1453 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
1455 unsigned int bottom = cu_header->offset;
1456 unsigned int top = (cu_header->offset
1458 + cu_header->initial_length_size);
1460 return (offset >= bottom && offset < top);
1463 /* Read in the comp unit header information from the debug_info at info_ptr.
1464 NOTE: This leaves members offset, first_die_offset to be filled in
1468 read_comp_unit_head (struct comp_unit_head *cu_header,
1469 gdb_byte *info_ptr, bfd *abfd)
1472 unsigned int bytes_read;
1474 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
1475 cu_header->initial_length_size = bytes_read;
1476 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
1477 info_ptr += bytes_read;
1478 cu_header->version = read_2_bytes (abfd, info_ptr);
1480 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1482 info_ptr += bytes_read;
1483 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1485 signed_addr = bfd_get_sign_extend_vma (abfd);
1486 if (signed_addr < 0)
1487 internal_error (__FILE__, __LINE__,
1488 _("read_comp_unit_head: dwarf from non elf file"));
1489 cu_header->signed_addr_p = signed_addr;
1495 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1496 gdb_byte *buffer, unsigned int buffer_size,
1499 gdb_byte *beg_of_comp_unit = info_ptr;
1501 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1503 if (header->version != 2 && header->version != 3 && header->version != 4)
1504 error (_("Dwarf Error: wrong version in compilation unit header "
1505 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
1506 bfd_get_filename (abfd));
1508 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
1509 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1510 "(offset 0x%lx + 6) [in module %s]"),
1511 (long) header->abbrev_offset,
1512 (long) (beg_of_comp_unit - buffer),
1513 bfd_get_filename (abfd));
1515 if (beg_of_comp_unit + header->length + header->initial_length_size
1516 > buffer + buffer_size)
1517 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1518 "(offset 0x%lx + 0) [in module %s]"),
1519 (long) header->length,
1520 (long) (beg_of_comp_unit - buffer),
1521 bfd_get_filename (abfd));
1526 /* Read in the types comp unit header information from .debug_types entry at
1527 types_ptr. The result is a pointer to one past the end of the header. */
1530 read_type_comp_unit_head (struct comp_unit_head *cu_header,
1531 ULONGEST *signature,
1532 gdb_byte *types_ptr, bfd *abfd)
1534 gdb_byte *initial_types_ptr = types_ptr;
1536 dwarf2_read_section (dwarf2_per_objfile->objfile,
1537 &dwarf2_per_objfile->types);
1538 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
1540 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
1542 *signature = read_8_bytes (abfd, types_ptr);
1544 types_ptr += cu_header->offset_size;
1545 cu_header->first_die_offset = types_ptr - initial_types_ptr;
1550 /* Allocate a new partial symtab for file named NAME and mark this new
1551 partial symtab as being an include of PST. */
1554 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1555 struct objfile *objfile)
1557 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1559 subpst->section_offsets = pst->section_offsets;
1560 subpst->textlow = 0;
1561 subpst->texthigh = 0;
1563 subpst->dependencies = (struct partial_symtab **)
1564 obstack_alloc (&objfile->objfile_obstack,
1565 sizeof (struct partial_symtab *));
1566 subpst->dependencies[0] = pst;
1567 subpst->number_of_dependencies = 1;
1569 subpst->globals_offset = 0;
1570 subpst->n_global_syms = 0;
1571 subpst->statics_offset = 0;
1572 subpst->n_static_syms = 0;
1573 subpst->symtab = NULL;
1574 subpst->read_symtab = pst->read_symtab;
1577 /* No private part is necessary for include psymtabs. This property
1578 can be used to differentiate between such include psymtabs and
1579 the regular ones. */
1580 subpst->read_symtab_private = NULL;
1583 /* Read the Line Number Program data and extract the list of files
1584 included by the source file represented by PST. Build an include
1585 partial symtab for each of these included files. */
1588 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1589 struct die_info *die,
1590 struct partial_symtab *pst)
1592 struct objfile *objfile = cu->objfile;
1593 bfd *abfd = objfile->obfd;
1594 struct line_header *lh = NULL;
1595 struct attribute *attr;
1597 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
1600 unsigned int line_offset = DW_UNSND (attr);
1602 lh = dwarf_decode_line_header (line_offset, abfd, cu);
1605 return; /* No linetable, so no includes. */
1607 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1609 free_line_header (lh);
1613 hash_type_signature (const void *item)
1615 const struct signatured_type *type_sig = item;
1617 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1618 return type_sig->signature;
1622 eq_type_signature (const void *item_lhs, const void *item_rhs)
1624 const struct signatured_type *lhs = item_lhs;
1625 const struct signatured_type *rhs = item_rhs;
1627 return lhs->signature == rhs->signature;
1630 /* Create the hash table of all entries in the .debug_types section.
1631 The result is zero if there is an error (e.g. missing .debug_types section),
1632 otherwise non-zero. */
1635 create_debug_types_hash_table (struct objfile *objfile)
1640 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
1641 info_ptr = dwarf2_per_objfile->types.buffer;
1643 if (info_ptr == NULL)
1645 dwarf2_per_objfile->signatured_types = NULL;
1649 types_htab = htab_create_alloc_ex (41,
1650 hash_type_signature,
1653 &objfile->objfile_obstack,
1654 hashtab_obstack_allocate,
1655 dummy_obstack_deallocate);
1657 if (dwarf2_die_debug)
1658 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
1660 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1662 unsigned int offset;
1663 unsigned int offset_size;
1664 unsigned int type_offset;
1665 unsigned int length, initial_length_size;
1666 unsigned short version;
1668 struct signatured_type *type_sig;
1670 gdb_byte *ptr = info_ptr;
1672 offset = ptr - dwarf2_per_objfile->types.buffer;
1674 /* We need to read the type's signature in order to build the hash
1675 table, but we don't need to read anything else just yet. */
1677 /* Sanity check to ensure entire cu is present. */
1678 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
1679 if (ptr + length + initial_length_size
1680 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1682 complaint (&symfile_complaints,
1683 _("debug type entry runs off end of `.debug_types' section, ignored"));
1687 offset_size = initial_length_size == 4 ? 4 : 8;
1688 ptr += initial_length_size;
1689 version = bfd_get_16 (objfile->obfd, ptr);
1691 ptr += offset_size; /* abbrev offset */
1692 ptr += 1; /* address size */
1693 signature = bfd_get_64 (objfile->obfd, ptr);
1695 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
1697 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
1698 memset (type_sig, 0, sizeof (*type_sig));
1699 type_sig->signature = signature;
1700 type_sig->offset = offset;
1701 type_sig->type_offset = type_offset;
1703 slot = htab_find_slot (types_htab, type_sig, INSERT);
1704 gdb_assert (slot != NULL);
1707 if (dwarf2_die_debug)
1708 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
1709 offset, phex (signature, sizeof (signature)));
1711 info_ptr = info_ptr + initial_length_size + length;
1714 dwarf2_per_objfile->signatured_types = types_htab;
1719 /* Lookup a signature based type.
1720 Returns NULL if SIG is not present in the table. */
1722 static struct signatured_type *
1723 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
1725 struct signatured_type find_entry, *entry;
1727 if (dwarf2_per_objfile->signatured_types == NULL)
1729 complaint (&symfile_complaints,
1730 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1734 find_entry.signature = sig;
1735 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
1739 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1742 init_cu_die_reader (struct die_reader_specs *reader,
1743 struct dwarf2_cu *cu)
1745 reader->abfd = cu->objfile->obfd;
1747 if (cu->per_cu->from_debug_types)
1749 gdb_assert (dwarf2_per_objfile->types.readin);
1750 reader->buffer = dwarf2_per_objfile->types.buffer;
1754 gdb_assert (dwarf2_per_objfile->info.readin);
1755 reader->buffer = dwarf2_per_objfile->info.buffer;
1759 /* Find the base address of the compilation unit for range lists and
1760 location lists. It will normally be specified by DW_AT_low_pc.
1761 In DWARF-3 draft 4, the base address could be overridden by
1762 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1763 compilation units with discontinuous ranges. */
1766 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
1768 struct attribute *attr;
1771 cu->base_address = 0;
1773 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
1776 cu->base_address = DW_ADDR (attr);
1781 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
1784 cu->base_address = DW_ADDR (attr);
1790 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1791 to combine the common parts.
1792 Process a compilation unit for a psymtab.
1793 BUFFER is a pointer to the beginning of the dwarf section buffer,
1794 either .debug_info or debug_types.
1795 INFO_PTR is a pointer to the start of the CU.
1796 Returns a pointer to the next CU. */
1799 process_psymtab_comp_unit (struct objfile *objfile,
1800 struct dwarf2_per_cu_data *this_cu,
1801 gdb_byte *buffer, gdb_byte *info_ptr,
1802 unsigned int buffer_size)
1804 bfd *abfd = objfile->obfd;
1805 gdb_byte *beg_of_comp_unit = info_ptr;
1806 struct die_info *comp_unit_die;
1807 struct partial_symtab *pst;
1809 struct cleanup *back_to_inner;
1810 struct dwarf2_cu cu;
1811 int has_children, has_pc_info;
1812 struct attribute *attr;
1813 CORE_ADDR best_lowpc = 0, best_highpc = 0;
1814 struct die_reader_specs reader_specs;
1816 memset (&cu, 0, sizeof (cu));
1817 cu.objfile = objfile;
1818 obstack_init (&cu.comp_unit_obstack);
1820 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1822 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
1823 buffer, buffer_size,
1826 /* Complete the cu_header. */
1827 cu.header.offset = beg_of_comp_unit - buffer;
1828 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
1830 cu.list_in_scope = &file_symbols;
1832 /* If this compilation unit was already read in, free the
1833 cached copy in order to read it in again. This is
1834 necessary because we skipped some symbols when we first
1835 read in the compilation unit (see load_partial_dies).
1836 This problem could be avoided, but the benefit is
1838 if (this_cu->cu != NULL)
1839 free_one_cached_comp_unit (this_cu->cu);
1841 /* Note that this is a pointer to our stack frame, being
1842 added to a global data structure. It will be cleaned up
1843 in free_stack_comp_unit when we finish with this
1844 compilation unit. */
1846 cu.per_cu = this_cu;
1848 /* Read the abbrevs for this compilation unit into a table. */
1849 dwarf2_read_abbrevs (abfd, &cu);
1850 make_cleanup (dwarf2_free_abbrev_table, &cu);
1852 /* Read the compilation unit die. */
1853 if (this_cu->from_debug_types)
1854 info_ptr += 8 /*signature*/ + cu.header.offset_size;
1855 init_cu_die_reader (&reader_specs, &cu);
1856 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
1859 if (this_cu->from_debug_types)
1861 /* offset,length haven't been set yet for type units. */
1862 this_cu->offset = cu.header.offset;
1863 this_cu->length = cu.header.length + cu.header.initial_length_size;
1865 else if (comp_unit_die->tag == DW_TAG_partial_unit)
1867 info_ptr = (beg_of_comp_unit + cu.header.length
1868 + cu.header.initial_length_size);
1869 do_cleanups (back_to_inner);
1873 /* Set the language we're debugging. */
1874 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
1876 set_cu_language (DW_UNSND (attr), &cu);
1878 set_cu_language (language_minimal, &cu);
1880 /* Allocate a new partial symbol table structure. */
1881 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
1882 pst = start_psymtab_common (objfile, objfile->section_offsets,
1883 (attr != NULL) ? DW_STRING (attr) : "",
1884 /* TEXTLOW and TEXTHIGH are set below. */
1886 objfile->global_psymbols.next,
1887 objfile->static_psymbols.next);
1889 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
1891 pst->dirname = DW_STRING (attr);
1893 pst->read_symtab_private = this_cu;
1895 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1897 /* Store the function that reads in the rest of the symbol table */
1898 pst->read_symtab = dwarf2_psymtab_to_symtab;
1900 this_cu->psymtab = pst;
1902 dwarf2_find_base_address (comp_unit_die, &cu);
1904 /* Possibly set the default values of LOWPC and HIGHPC from
1906 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
1907 &best_highpc, &cu, pst);
1908 if (has_pc_info == 1 && best_lowpc < best_highpc)
1909 /* Store the contiguous range if it is not empty; it can be empty for
1910 CUs with no code. */
1911 addrmap_set_empty (objfile->psymtabs_addrmap,
1912 best_lowpc + baseaddr,
1913 best_highpc + baseaddr - 1, pst);
1915 /* Check if comp unit has_children.
1916 If so, read the rest of the partial symbols from this comp unit.
1917 If not, there's no more debug_info for this comp unit. */
1920 struct partial_die_info *first_die;
1921 CORE_ADDR lowpc, highpc;
1923 lowpc = ((CORE_ADDR) -1);
1924 highpc = ((CORE_ADDR) 0);
1926 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
1928 scan_partial_symbols (first_die, &lowpc, &highpc,
1929 ! has_pc_info, &cu);
1931 /* If we didn't find a lowpc, set it to highpc to avoid
1932 complaints from `maint check'. */
1933 if (lowpc == ((CORE_ADDR) -1))
1936 /* If the compilation unit didn't have an explicit address range,
1937 then use the information extracted from its child dies. */
1941 best_highpc = highpc;
1944 pst->textlow = best_lowpc + baseaddr;
1945 pst->texthigh = best_highpc + baseaddr;
1947 pst->n_global_syms = objfile->global_psymbols.next -
1948 (objfile->global_psymbols.list + pst->globals_offset);
1949 pst->n_static_syms = objfile->static_psymbols.next -
1950 (objfile->static_psymbols.list + pst->statics_offset);
1951 sort_pst_symbols (pst);
1953 info_ptr = (beg_of_comp_unit + cu.header.length
1954 + cu.header.initial_length_size);
1956 if (this_cu->from_debug_types)
1958 /* It's not clear we want to do anything with stmt lists here.
1959 Waiting to see what gcc ultimately does. */
1963 /* Get the list of files included in the current compilation unit,
1964 and build a psymtab for each of them. */
1965 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
1968 do_cleanups (back_to_inner);
1973 /* Traversal function for htab_traverse_noresize.
1974 Process one .debug_types comp-unit. */
1977 process_type_comp_unit (void **slot, void *info)
1979 struct signatured_type *entry = (struct signatured_type *) *slot;
1980 struct objfile *objfile = (struct objfile *) info;
1981 struct dwarf2_per_cu_data *this_cu;
1983 this_cu = &entry->per_cu;
1984 this_cu->from_debug_types = 1;
1986 gdb_assert (dwarf2_per_objfile->types.readin);
1987 process_psymtab_comp_unit (objfile, this_cu,
1988 dwarf2_per_objfile->types.buffer,
1989 dwarf2_per_objfile->types.buffer + entry->offset,
1990 dwarf2_per_objfile->types.size);
1995 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1996 Build partial symbol tables for the .debug_types comp-units. */
1999 build_type_psymtabs (struct objfile *objfile)
2001 if (! create_debug_types_hash_table (objfile))
2004 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
2005 process_type_comp_unit, objfile);
2008 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
2011 psymtabs_addrmap_cleanup (void *o)
2013 struct objfile *objfile = o;
2015 objfile->psymtabs_addrmap = NULL;
2018 /* Build the partial symbol table by doing a quick pass through the
2019 .debug_info and .debug_abbrev sections. */
2022 dwarf2_build_psymtabs_hard (struct objfile *objfile)
2025 struct cleanup *back_to, *addrmap_cleanup;
2026 struct obstack temp_obstack;
2028 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
2029 info_ptr = dwarf2_per_objfile->info.buffer;
2031 /* Any cached compilation units will be linked by the per-objfile
2032 read_in_chain. Make sure to free them when we're done. */
2033 back_to = make_cleanup (free_cached_comp_units, NULL);
2035 build_type_psymtabs (objfile);
2037 create_all_comp_units (objfile);
2039 /* Create a temporary address map on a temporary obstack. We later
2040 copy this to the final obstack. */
2041 obstack_init (&temp_obstack);
2042 make_cleanup_obstack_free (&temp_obstack);
2043 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
2044 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
2046 /* Since the objects we're extracting from .debug_info vary in
2047 length, only the individual functions to extract them (like
2048 read_comp_unit_head and load_partial_die) can really know whether
2049 the buffer is large enough to hold another complete object.
2051 At the moment, they don't actually check that. If .debug_info
2052 holds just one extra byte after the last compilation unit's dies,
2053 then read_comp_unit_head will happily read off the end of the
2054 buffer. read_partial_die is similarly casual. Those functions
2057 For this loop condition, simply checking whether there's any data
2058 left at all should be sufficient. */
2060 while (info_ptr < (dwarf2_per_objfile->info.buffer
2061 + dwarf2_per_objfile->info.size))
2063 struct dwarf2_per_cu_data *this_cu;
2065 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
2068 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
2069 dwarf2_per_objfile->info.buffer,
2071 dwarf2_per_objfile->info.size);
2074 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
2075 &objfile->objfile_obstack);
2076 discard_cleanups (addrmap_cleanup);
2078 do_cleanups (back_to);
2081 /* Load the partial DIEs for a secondary CU into memory. */
2084 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
2085 struct objfile *objfile)
2087 bfd *abfd = objfile->obfd;
2088 gdb_byte *info_ptr, *beg_of_comp_unit;
2089 struct die_info *comp_unit_die;
2090 struct dwarf2_cu *cu;
2091 struct cleanup *back_to;
2092 struct attribute *attr;
2094 struct die_reader_specs reader_specs;
2096 gdb_assert (! this_cu->from_debug_types);
2098 gdb_assert (dwarf2_per_objfile->info.readin);
2099 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
2100 beg_of_comp_unit = info_ptr;
2102 cu = alloc_one_comp_unit (objfile);
2104 /* ??? Missing cleanup for CU? */
2106 /* Link this compilation unit into the compilation unit tree. */
2108 cu->per_cu = this_cu;
2109 cu->type_hash = this_cu->type_hash;
2111 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
2112 dwarf2_per_objfile->info.buffer,
2113 dwarf2_per_objfile->info.size,
2116 /* Complete the cu_header. */
2117 cu->header.offset = this_cu->offset;
2118 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
2120 /* Read the abbrevs for this compilation unit into a table. */
2121 dwarf2_read_abbrevs (abfd, cu);
2122 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2124 /* Read the compilation unit die. */
2125 init_cu_die_reader (&reader_specs, cu);
2126 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2129 /* Set the language we're debugging. */
2130 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
2132 set_cu_language (DW_UNSND (attr), cu);
2134 set_cu_language (language_minimal, cu);
2136 /* Check if comp unit has_children.
2137 If so, read the rest of the partial symbols from this comp unit.
2138 If not, there's no more debug_info for this comp unit. */
2140 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
2142 do_cleanups (back_to);
2145 /* Create a list of all compilation units in OBJFILE. We do this only
2146 if an inter-comp-unit reference is found; presumably if there is one,
2147 there will be many, and one will occur early in the .debug_info section.
2148 So there's no point in building this list incrementally. */
2151 create_all_comp_units (struct objfile *objfile)
2155 struct dwarf2_per_cu_data **all_comp_units;
2158 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
2159 info_ptr = dwarf2_per_objfile->info.buffer;
2163 all_comp_units = xmalloc (n_allocated
2164 * sizeof (struct dwarf2_per_cu_data *));
2166 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
2168 unsigned int length, initial_length_size;
2169 struct dwarf2_per_cu_data *this_cu;
2170 unsigned int offset;
2172 offset = info_ptr - dwarf2_per_objfile->info.buffer;
2174 /* Read just enough information to find out where the next
2175 compilation unit is. */
2176 length = read_initial_length (objfile->obfd, info_ptr,
2177 &initial_length_size);
2179 /* Save the compilation unit for later lookup. */
2180 this_cu = obstack_alloc (&objfile->objfile_obstack,
2181 sizeof (struct dwarf2_per_cu_data));
2182 memset (this_cu, 0, sizeof (*this_cu));
2183 this_cu->offset = offset;
2184 this_cu->length = length + initial_length_size;
2186 if (n_comp_units == n_allocated)
2189 all_comp_units = xrealloc (all_comp_units,
2191 * sizeof (struct dwarf2_per_cu_data *));
2193 all_comp_units[n_comp_units++] = this_cu;
2195 info_ptr = info_ptr + this_cu->length;
2198 dwarf2_per_objfile->all_comp_units
2199 = obstack_alloc (&objfile->objfile_obstack,
2200 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2201 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
2202 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2203 xfree (all_comp_units);
2204 dwarf2_per_objfile->n_comp_units = n_comp_units;
2207 /* Process all loaded DIEs for compilation unit CU, starting at
2208 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2209 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2210 DW_AT_ranges). If NEED_PC is set, then this function will set
2211 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2212 and record the covered ranges in the addrmap. */
2215 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
2216 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2218 struct partial_die_info *pdi;
2220 /* Now, march along the PDI's, descending into ones which have
2221 interesting children but skipping the children of the other ones,
2222 until we reach the end of the compilation unit. */
2228 fixup_partial_die (pdi, cu);
2230 /* Anonymous namespaces or modules have no name but have interesting
2231 children, so we need to look at them. Ditto for anonymous
2234 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
2235 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
2239 case DW_TAG_subprogram:
2240 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2242 case DW_TAG_variable:
2243 case DW_TAG_typedef:
2244 case DW_TAG_union_type:
2245 if (!pdi->is_declaration)
2247 add_partial_symbol (pdi, cu);
2250 case DW_TAG_class_type:
2251 case DW_TAG_interface_type:
2252 case DW_TAG_structure_type:
2253 if (!pdi->is_declaration)
2255 add_partial_symbol (pdi, cu);
2258 case DW_TAG_enumeration_type:
2259 if (!pdi->is_declaration)
2260 add_partial_enumeration (pdi, cu);
2262 case DW_TAG_base_type:
2263 case DW_TAG_subrange_type:
2264 /* File scope base type definitions are added to the partial
2266 add_partial_symbol (pdi, cu);
2268 case DW_TAG_namespace:
2269 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
2272 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
2279 /* If the die has a sibling, skip to the sibling. */
2281 pdi = pdi->die_sibling;
2285 /* Functions used to compute the fully scoped name of a partial DIE.
2287 Normally, this is simple. For C++, the parent DIE's fully scoped
2288 name is concatenated with "::" and the partial DIE's name. For
2289 Java, the same thing occurs except that "." is used instead of "::".
2290 Enumerators are an exception; they use the scope of their parent
2291 enumeration type, i.e. the name of the enumeration type is not
2292 prepended to the enumerator.
2294 There are two complexities. One is DW_AT_specification; in this
2295 case "parent" means the parent of the target of the specification,
2296 instead of the direct parent of the DIE. The other is compilers
2297 which do not emit DW_TAG_namespace; in this case we try to guess
2298 the fully qualified name of structure types from their members'
2299 linkage names. This must be done using the DIE's children rather
2300 than the children of any DW_AT_specification target. We only need
2301 to do this for structures at the top level, i.e. if the target of
2302 any DW_AT_specification (if any; otherwise the DIE itself) does not
2305 /* Compute the scope prefix associated with PDI's parent, in
2306 compilation unit CU. The result will be allocated on CU's
2307 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2308 field. NULL is returned if no prefix is necessary. */
2310 partial_die_parent_scope (struct partial_die_info *pdi,
2311 struct dwarf2_cu *cu)
2313 char *grandparent_scope;
2314 struct partial_die_info *parent, *real_pdi;
2316 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2317 then this means the parent of the specification DIE. */
2320 while (real_pdi->has_specification)
2321 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2323 parent = real_pdi->die_parent;
2327 if (parent->scope_set)
2328 return parent->scope;
2330 fixup_partial_die (parent, cu);
2332 grandparent_scope = partial_die_parent_scope (parent, cu);
2334 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2335 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2336 Work around this problem here. */
2337 if (cu->language == language_cplus
2338 && parent->tag == DW_TAG_namespace
2339 && strcmp (parent->name, "::") == 0
2340 && grandparent_scope == NULL)
2342 parent->scope = NULL;
2343 parent->scope_set = 1;
2347 if (parent->tag == DW_TAG_namespace
2348 || parent->tag == DW_TAG_module
2349 || parent->tag == DW_TAG_structure_type
2350 || parent->tag == DW_TAG_class_type
2351 || parent->tag == DW_TAG_interface_type
2352 || parent->tag == DW_TAG_union_type
2353 || parent->tag == DW_TAG_enumeration_type)
2355 if (grandparent_scope == NULL)
2356 parent->scope = parent->name;
2358 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
2359 parent->name, 0, cu);
2361 else if (parent->tag == DW_TAG_enumerator)
2362 /* Enumerators should not get the name of the enumeration as a prefix. */
2363 parent->scope = grandparent_scope;
2366 /* FIXME drow/2004-04-01: What should we be doing with
2367 function-local names? For partial symbols, we should probably be
2369 complaint (&symfile_complaints,
2370 _("unhandled containing DIE tag %d for DIE at %d"),
2371 parent->tag, pdi->offset);
2372 parent->scope = grandparent_scope;
2375 parent->scope_set = 1;
2376 return parent->scope;
2379 /* Return the fully scoped name associated with PDI, from compilation unit
2380 CU. The result will be allocated with malloc. */
2382 partial_die_full_name (struct partial_die_info *pdi,
2383 struct dwarf2_cu *cu)
2387 parent_scope = partial_die_parent_scope (pdi, cu);
2388 if (parent_scope == NULL)
2391 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
2395 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
2397 struct objfile *objfile = cu->objfile;
2399 char *actual_name = NULL;
2400 const struct partial_symbol *psym = NULL;
2402 int built_actual_name = 0;
2404 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2406 actual_name = partial_die_full_name (pdi, cu);
2408 built_actual_name = 1;
2410 if (actual_name == NULL)
2411 actual_name = pdi->name;
2415 case DW_TAG_subprogram:
2416 if (pdi->is_external || cu->language == language_ada)
2418 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2419 of the global scope. But in Ada, we want to be able to access
2420 nested procedures globally. So all Ada subprograms are stored
2421 in the global scope. */
2422 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2423 mst_text, objfile); */
2424 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2426 VAR_DOMAIN, LOC_BLOCK,
2427 &objfile->global_psymbols,
2428 0, pdi->lowpc + baseaddr,
2429 cu->language, objfile);
2433 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2434 mst_file_text, objfile); */
2435 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2437 VAR_DOMAIN, LOC_BLOCK,
2438 &objfile->static_psymbols,
2439 0, pdi->lowpc + baseaddr,
2440 cu->language, objfile);
2443 case DW_TAG_variable:
2444 if (pdi->is_external)
2447 Don't enter into the minimal symbol tables as there is
2448 a minimal symbol table entry from the ELF symbols already.
2449 Enter into partial symbol table if it has a location
2450 descriptor or a type.
2451 If the location descriptor is missing, new_symbol will create
2452 a LOC_UNRESOLVED symbol, the address of the variable will then
2453 be determined from the minimal symbol table whenever the variable
2455 The address for the partial symbol table entry is not
2456 used by GDB, but it comes in handy for debugging partial symbol
2460 addr = decode_locdesc (pdi->locdesc, cu);
2461 if (pdi->locdesc || pdi->has_type)
2462 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2464 VAR_DOMAIN, LOC_STATIC,
2465 &objfile->global_psymbols,
2467 cu->language, objfile);
2471 /* Static Variable. Skip symbols without location descriptors. */
2472 if (pdi->locdesc == NULL)
2474 if (built_actual_name)
2475 xfree (actual_name);
2478 addr = decode_locdesc (pdi->locdesc, cu);
2479 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2480 mst_file_data, objfile); */
2481 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2483 VAR_DOMAIN, LOC_STATIC,
2484 &objfile->static_psymbols,
2486 cu->language, objfile);
2489 case DW_TAG_typedef:
2490 case DW_TAG_base_type:
2491 case DW_TAG_subrange_type:
2492 add_psymbol_to_list (actual_name, strlen (actual_name),
2494 VAR_DOMAIN, LOC_TYPEDEF,
2495 &objfile->static_psymbols,
2496 0, (CORE_ADDR) 0, cu->language, objfile);
2498 case DW_TAG_namespace:
2499 add_psymbol_to_list (actual_name, strlen (actual_name),
2501 VAR_DOMAIN, LOC_TYPEDEF,
2502 &objfile->global_psymbols,
2503 0, (CORE_ADDR) 0, cu->language, objfile);
2505 case DW_TAG_class_type:
2506 case DW_TAG_interface_type:
2507 case DW_TAG_structure_type:
2508 case DW_TAG_union_type:
2509 case DW_TAG_enumeration_type:
2510 /* Skip external references. The DWARF standard says in the section
2511 about "Structure, Union, and Class Type Entries": "An incomplete
2512 structure, union or class type is represented by a structure,
2513 union or class entry that does not have a byte size attribute
2514 and that has a DW_AT_declaration attribute." */
2515 if (!pdi->has_byte_size && pdi->is_declaration)
2517 if (built_actual_name)
2518 xfree (actual_name);
2522 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2523 static vs. global. */
2524 add_psymbol_to_list (actual_name, strlen (actual_name),
2526 STRUCT_DOMAIN, LOC_TYPEDEF,
2527 (cu->language == language_cplus
2528 || cu->language == language_java)
2529 ? &objfile->global_psymbols
2530 : &objfile->static_psymbols,
2531 0, (CORE_ADDR) 0, cu->language, objfile);
2534 case DW_TAG_enumerator:
2535 add_psymbol_to_list (actual_name, strlen (actual_name),
2537 VAR_DOMAIN, LOC_CONST,
2538 (cu->language == language_cplus
2539 || cu->language == language_java)
2540 ? &objfile->global_psymbols
2541 : &objfile->static_psymbols,
2542 0, (CORE_ADDR) 0, cu->language, objfile);
2548 if (built_actual_name)
2549 xfree (actual_name);
2552 /* Read a partial die corresponding to a namespace; also, add a symbol
2553 corresponding to that namespace to the symbol table. NAMESPACE is
2554 the name of the enclosing namespace. */
2557 add_partial_namespace (struct partial_die_info *pdi,
2558 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2559 int need_pc, struct dwarf2_cu *cu)
2561 /* Add a symbol for the namespace. */
2563 add_partial_symbol (pdi, cu);
2565 /* Now scan partial symbols in that namespace. */
2567 if (pdi->has_children)
2568 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2571 /* Read a partial die corresponding to a Fortran module. */
2574 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
2575 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2577 /* Now scan partial symbols in that module. */
2579 if (pdi->has_children)
2580 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2583 /* Read a partial die corresponding to a subprogram and create a partial
2584 symbol for that subprogram. When the CU language allows it, this
2585 routine also defines a partial symbol for each nested subprogram
2586 that this subprogram contains.
2588 DIE my also be a lexical block, in which case we simply search
2589 recursively for suprograms defined inside that lexical block.
2590 Again, this is only performed when the CU language allows this
2591 type of definitions. */
2594 add_partial_subprogram (struct partial_die_info *pdi,
2595 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2596 int need_pc, struct dwarf2_cu *cu)
2598 if (pdi->tag == DW_TAG_subprogram)
2600 if (pdi->has_pc_info)
2602 if (pdi->lowpc < *lowpc)
2603 *lowpc = pdi->lowpc;
2604 if (pdi->highpc > *highpc)
2605 *highpc = pdi->highpc;
2609 struct objfile *objfile = cu->objfile;
2611 baseaddr = ANOFFSET (objfile->section_offsets,
2612 SECT_OFF_TEXT (objfile));
2613 addrmap_set_empty (objfile->psymtabs_addrmap,
2614 pdi->lowpc + baseaddr,
2615 pdi->highpc - 1 + baseaddr,
2616 cu->per_cu->psymtab);
2618 if (!pdi->is_declaration)
2619 /* Ignore subprogram DIEs that do not have a name, they are
2620 illegal. Do not emit a complaint at this point, we will
2621 do so when we convert this psymtab into a symtab. */
2623 add_partial_symbol (pdi, cu);
2627 if (! pdi->has_children)
2630 if (cu->language == language_ada)
2632 pdi = pdi->die_child;
2635 fixup_partial_die (pdi, cu);
2636 if (pdi->tag == DW_TAG_subprogram
2637 || pdi->tag == DW_TAG_lexical_block)
2638 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2639 pdi = pdi->die_sibling;
2644 /* See if we can figure out if the class lives in a namespace. We do
2645 this by looking for a member function; its demangled name will
2646 contain namespace info, if there is any. */
2649 guess_structure_name (struct partial_die_info *struct_pdi,
2650 struct dwarf2_cu *cu)
2652 if ((cu->language == language_cplus
2653 || cu->language == language_java)
2654 && cu->has_namespace_info == 0
2655 && struct_pdi->has_children)
2657 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2658 what template types look like, because the demangler
2659 frequently doesn't give the same name as the debug info. We
2660 could fix this by only using the demangled name to get the
2661 prefix (but see comment in read_structure_type). */
2663 struct partial_die_info *real_pdi;
2665 /* If this DIE (this DIE's specification, if any) has a parent, then
2666 we should not do this. We'll prepend the parent's fully qualified
2667 name when we create the partial symbol. */
2669 real_pdi = struct_pdi;
2670 while (real_pdi->has_specification)
2671 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2673 if (real_pdi->die_parent != NULL)
2678 /* Read a partial die corresponding to an enumeration type. */
2681 add_partial_enumeration (struct partial_die_info *enum_pdi,
2682 struct dwarf2_cu *cu)
2684 struct partial_die_info *pdi;
2686 if (enum_pdi->name != NULL)
2687 add_partial_symbol (enum_pdi, cu);
2689 pdi = enum_pdi->die_child;
2692 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2693 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2695 add_partial_symbol (pdi, cu);
2696 pdi = pdi->die_sibling;
2700 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2701 Return the corresponding abbrev, or NULL if the number is zero (indicating
2702 an empty DIE). In either case *BYTES_READ will be set to the length of
2703 the initial number. */
2705 static struct abbrev_info *
2706 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2707 struct dwarf2_cu *cu)
2709 bfd *abfd = cu->objfile->obfd;
2710 unsigned int abbrev_number;
2711 struct abbrev_info *abbrev;
2713 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2715 if (abbrev_number == 0)
2718 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2721 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2722 bfd_get_filename (abfd));
2728 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2729 Returns a pointer to the end of a series of DIEs, terminated by an empty
2730 DIE. Any children of the skipped DIEs will also be skipped. */
2733 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
2735 struct abbrev_info *abbrev;
2736 unsigned int bytes_read;
2740 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2742 return info_ptr + bytes_read;
2744 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
2748 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2749 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2750 abbrev corresponding to that skipped uleb128 should be passed in
2751 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2755 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
2756 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
2758 unsigned int bytes_read;
2759 struct attribute attr;
2760 bfd *abfd = cu->objfile->obfd;
2761 unsigned int form, i;
2763 for (i = 0; i < abbrev->num_attrs; i++)
2765 /* The only abbrev we care about is DW_AT_sibling. */
2766 if (abbrev->attrs[i].name == DW_AT_sibling)
2768 read_attribute (&attr, &abbrev->attrs[i],
2769 abfd, info_ptr, cu);
2770 if (attr.form == DW_FORM_ref_addr)
2771 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2773 return buffer + dwarf2_get_ref_die_offset (&attr);
2776 /* If it isn't DW_AT_sibling, skip this attribute. */
2777 form = abbrev->attrs[i].form;
2781 case DW_FORM_ref_addr:
2782 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2783 and later it is offset sized. */
2784 if (cu->header.version == 2)
2785 info_ptr += cu->header.addr_size;
2787 info_ptr += cu->header.offset_size;
2790 info_ptr += cu->header.addr_size;
2797 case DW_FORM_flag_present:
2812 case DW_FORM_string:
2813 read_string (abfd, info_ptr, &bytes_read);
2814 info_ptr += bytes_read;
2816 case DW_FORM_sec_offset:
2818 info_ptr += cu->header.offset_size;
2820 case DW_FORM_exprloc:
2822 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2823 info_ptr += bytes_read;
2825 case DW_FORM_block1:
2826 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2828 case DW_FORM_block2:
2829 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2831 case DW_FORM_block4:
2832 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2836 case DW_FORM_ref_udata:
2837 info_ptr = skip_leb128 (abfd, info_ptr);
2839 case DW_FORM_indirect:
2840 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2841 info_ptr += bytes_read;
2842 /* We need to continue parsing from here, so just go back to
2844 goto skip_attribute;
2847 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2848 dwarf_form_name (form),
2849 bfd_get_filename (abfd));
2853 if (abbrev->has_children)
2854 return skip_children (buffer, info_ptr, cu);
2859 /* Locate ORIG_PDI's sibling.
2860 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2864 locate_pdi_sibling (struct partial_die_info *orig_pdi,
2865 gdb_byte *buffer, gdb_byte *info_ptr,
2866 bfd *abfd, struct dwarf2_cu *cu)
2868 /* Do we know the sibling already? */
2870 if (orig_pdi->sibling)
2871 return orig_pdi->sibling;
2873 /* Are there any children to deal with? */
2875 if (!orig_pdi->has_children)
2878 /* Skip the children the long way. */
2880 return skip_children (buffer, info_ptr, cu);
2883 /* Expand this partial symbol table into a full symbol table. */
2886 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2888 /* FIXME: This is barely more than a stub. */
2893 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2899 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2900 gdb_flush (gdb_stdout);
2903 /* Restore our global data. */
2904 dwarf2_per_objfile = objfile_data (pst->objfile,
2905 dwarf2_objfile_data_key);
2907 /* If this psymtab is constructed from a debug-only objfile, the
2908 has_section_at_zero flag will not necessarily be correct. We
2909 can get the correct value for this flag by looking at the data
2910 associated with the (presumably stripped) associated objfile. */
2911 if (pst->objfile->separate_debug_objfile_backlink)
2913 struct dwarf2_per_objfile *dpo_backlink
2914 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
2915 dwarf2_objfile_data_key);
2917 dwarf2_per_objfile->has_section_at_zero
2918 = dpo_backlink->has_section_at_zero;
2921 psymtab_to_symtab_1 (pst);
2923 /* Finish up the debug error message. */
2925 printf_filtered (_("done.\n"));
2930 /* Add PER_CU to the queue. */
2933 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
2935 struct dwarf2_queue_item *item;
2938 item = xmalloc (sizeof (*item));
2939 item->per_cu = per_cu;
2942 if (dwarf2_queue == NULL)
2943 dwarf2_queue = item;
2945 dwarf2_queue_tail->next = item;
2947 dwarf2_queue_tail = item;
2950 /* Process the queue. */
2953 process_queue (struct objfile *objfile)
2955 struct dwarf2_queue_item *item, *next_item;
2957 /* The queue starts out with one item, but following a DIE reference
2958 may load a new CU, adding it to the end of the queue. */
2959 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
2961 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
2962 process_full_comp_unit (item->per_cu);
2964 item->per_cu->queued = 0;
2965 next_item = item->next;
2969 dwarf2_queue_tail = NULL;
2972 /* Free all allocated queue entries. This function only releases anything if
2973 an error was thrown; if the queue was processed then it would have been
2974 freed as we went along. */
2977 dwarf2_release_queue (void *dummy)
2979 struct dwarf2_queue_item *item, *last;
2981 item = dwarf2_queue;
2984 /* Anything still marked queued is likely to be in an
2985 inconsistent state, so discard it. */
2986 if (item->per_cu->queued)
2988 if (item->per_cu->cu != NULL)
2989 free_one_cached_comp_unit (item->per_cu->cu);
2990 item->per_cu->queued = 0;
2998 dwarf2_queue = dwarf2_queue_tail = NULL;
3001 /* Read in full symbols for PST, and anything it depends on. */
3004 psymtab_to_symtab_1 (struct partial_symtab *pst)
3006 struct dwarf2_per_cu_data *per_cu;
3007 struct cleanup *back_to;
3010 for (i = 0; i < pst->number_of_dependencies; i++)
3011 if (!pst->dependencies[i]->readin)
3013 /* Inform about additional files that need to be read in. */
3016 /* FIXME: i18n: Need to make this a single string. */
3017 fputs_filtered (" ", gdb_stdout);
3019 fputs_filtered ("and ", gdb_stdout);
3021 printf_filtered ("%s...", pst->dependencies[i]->filename);
3022 wrap_here (""); /* Flush output */
3023 gdb_flush (gdb_stdout);
3025 psymtab_to_symtab_1 (pst->dependencies[i]);
3028 per_cu = pst->read_symtab_private;
3032 /* It's an include file, no symbols to read for it.
3033 Everything is in the parent symtab. */
3038 back_to = make_cleanup (dwarf2_release_queue, NULL);
3040 queue_comp_unit (per_cu, pst->objfile);
3042 if (per_cu->from_debug_types)
3043 read_signatured_type_at_offset (pst->objfile, per_cu->offset);
3045 load_full_comp_unit (per_cu, pst->objfile);
3047 process_queue (pst->objfile);
3049 /* Age the cache, releasing compilation units that have not
3050 been used recently. */
3051 age_cached_comp_units ();
3053 do_cleanups (back_to);
3056 /* Load the DIEs associated with PER_CU into memory. */
3059 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3061 bfd *abfd = objfile->obfd;
3062 struct dwarf2_cu *cu;
3063 unsigned int offset;
3064 gdb_byte *info_ptr, *beg_of_comp_unit;
3065 struct cleanup *back_to, *free_cu_cleanup;
3066 struct attribute *attr;
3068 gdb_assert (! per_cu->from_debug_types);
3070 /* Set local variables from the partial symbol table info. */
3071 offset = per_cu->offset;
3073 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3074 info_ptr = dwarf2_per_objfile->info.buffer + offset;
3075 beg_of_comp_unit = info_ptr;
3077 cu = alloc_one_comp_unit (objfile);
3079 /* If an error occurs while loading, release our storage. */
3080 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3082 /* Read in the comp_unit header. */
3083 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
3085 /* Complete the cu_header. */
3086 cu->header.offset = offset;
3087 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3089 /* Read the abbrevs for this compilation unit. */
3090 dwarf2_read_abbrevs (abfd, cu);
3091 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
3093 /* Link this compilation unit into the compilation unit tree. */
3095 cu->per_cu = per_cu;
3096 cu->type_hash = per_cu->type_hash;
3098 cu->dies = read_comp_unit (info_ptr, cu);
3100 /* We try not to read any attributes in this function, because not
3101 all objfiles needed for references have been loaded yet, and symbol
3102 table processing isn't initialized. But we have to set the CU language,
3103 or we won't be able to build types correctly. */
3104 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
3106 set_cu_language (DW_UNSND (attr), cu);
3108 set_cu_language (language_minimal, cu);
3110 /* Similarly, if we do not read the producer, we can not apply
3111 producer-specific interpretation. */
3112 attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
3114 cu->producer = DW_STRING (attr);
3116 /* Link this CU into read_in_chain. */
3117 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3118 dwarf2_per_objfile->read_in_chain = per_cu;
3120 do_cleanups (back_to);
3122 /* We've successfully allocated this compilation unit. Let our caller
3123 clean it up when finished with it. */
3124 discard_cleanups (free_cu_cleanup);
3127 /* Generate full symbol information for PST and CU, whose DIEs have
3128 already been loaded into memory. */
3131 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
3133 struct partial_symtab *pst = per_cu->psymtab;
3134 struct dwarf2_cu *cu = per_cu->cu;
3135 struct objfile *objfile = pst->objfile;
3136 CORE_ADDR lowpc, highpc;
3137 struct symtab *symtab;
3138 struct cleanup *back_to;
3141 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3144 back_to = make_cleanup (really_free_pendings, NULL);
3146 cu->list_in_scope = &file_symbols;
3148 dwarf2_find_base_address (cu->dies, cu);
3150 /* Do line number decoding in read_file_scope () */
3151 process_die (cu->dies, cu);
3153 /* Some compilers don't define a DW_AT_high_pc attribute for the
3154 compilation unit. If the DW_AT_high_pc is missing, synthesize
3155 it, by scanning the DIE's below the compilation unit. */
3156 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
3158 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
3160 /* Set symtab language to language from DW_AT_language.
3161 If the compilation is from a C file generated by language preprocessors,
3162 do not set the language if it was already deduced by start_subfile. */
3164 && !(cu->language == language_c && symtab->language != language_c))
3166 symtab->language = cu->language;
3168 pst->symtab = symtab;
3171 do_cleanups (back_to);
3174 /* Process a die and its children. */
3177 process_die (struct die_info *die, struct dwarf2_cu *cu)
3181 case DW_TAG_padding:
3183 case DW_TAG_compile_unit:
3184 read_file_scope (die, cu);
3186 case DW_TAG_type_unit:
3187 read_type_unit_scope (die, cu);
3189 case DW_TAG_subprogram:
3190 case DW_TAG_inlined_subroutine:
3191 read_func_scope (die, cu);
3193 case DW_TAG_lexical_block:
3194 case DW_TAG_try_block:
3195 case DW_TAG_catch_block:
3196 read_lexical_block_scope (die, cu);
3198 case DW_TAG_class_type:
3199 case DW_TAG_interface_type:
3200 case DW_TAG_structure_type:
3201 case DW_TAG_union_type:
3202 process_structure_scope (die, cu);
3204 case DW_TAG_enumeration_type:
3205 process_enumeration_scope (die, cu);
3208 /* These dies have a type, but processing them does not create
3209 a symbol or recurse to process the children. Therefore we can
3210 read them on-demand through read_type_die. */
3211 case DW_TAG_subroutine_type:
3212 case DW_TAG_set_type:
3213 case DW_TAG_array_type:
3214 case DW_TAG_pointer_type:
3215 case DW_TAG_ptr_to_member_type:
3216 case DW_TAG_reference_type:
3217 case DW_TAG_string_type:
3220 case DW_TAG_base_type:
3221 case DW_TAG_subrange_type:
3222 case DW_TAG_typedef:
3223 /* Add a typedef symbol for the type definition, if it has a
3225 new_symbol (die, read_type_die (die, cu), cu);
3227 case DW_TAG_common_block:
3228 read_common_block (die, cu);
3230 case DW_TAG_common_inclusion:
3232 case DW_TAG_namespace:
3233 processing_has_namespace_info = 1;
3234 read_namespace (die, cu);
3237 processing_has_namespace_info = 1;
3238 read_module (die, cu);
3240 case DW_TAG_imported_declaration:
3241 case DW_TAG_imported_module:
3242 processing_has_namespace_info = 1;
3243 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
3244 || cu->language != language_fortran))
3245 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
3246 dwarf_tag_name (die->tag));
3247 read_import_statement (die, cu);
3250 new_symbol (die, NULL, cu);
3255 /* A helper function for dwarf2_compute_name which determines whether DIE
3256 needs to have the name of the scope prepended to the name listed in the
3260 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
3262 struct attribute *attr;
3266 case DW_TAG_namespace:
3267 case DW_TAG_typedef:
3268 case DW_TAG_class_type:
3269 case DW_TAG_interface_type:
3270 case DW_TAG_structure_type:
3271 case DW_TAG_union_type:
3272 case DW_TAG_enumeration_type:
3273 case DW_TAG_enumerator:
3274 case DW_TAG_subprogram:
3278 case DW_TAG_variable:
3279 /* We only need to prefix "globally" visible variables. These include
3280 any variable marked with DW_AT_external or any variable that
3281 lives in a namespace. [Variables in anonymous namespaces
3282 require prefixing, but they are not DW_AT_external.] */
3284 if (dwarf2_attr (die, DW_AT_specification, cu))
3286 struct dwarf2_cu *spec_cu = cu;
3288 return die_needs_namespace (die_specification (die, &spec_cu),
3292 attr = dwarf2_attr (die, DW_AT_external, cu);
3293 if (attr == NULL && die->parent->tag != DW_TAG_namespace
3294 && die->parent->tag != DW_TAG_module)
3296 /* A variable in a lexical block of some kind does not need a
3297 namespace, even though in C++ such variables may be external
3298 and have a mangled name. */
3299 if (die->parent->tag == DW_TAG_lexical_block
3300 || die->parent->tag == DW_TAG_try_block
3301 || die->parent->tag == DW_TAG_catch_block
3302 || die->parent->tag == DW_TAG_subprogram)
3311 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3312 compute the physname for the object, which include a method's
3313 formal parameters (C++/Java) and return type (Java).
3315 For Ada, return the DIE's linkage name rather than the fully qualified
3316 name. PHYSNAME is ignored..
3318 The result is allocated on the objfile_obstack and canonicalized. */
3321 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
3325 name = dwarf2_name (die, cu);
3327 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
3328 compute it by typename_concat inside GDB. */
3329 if (cu->language == language_ada
3330 || (cu->language == language_fortran && physname))
3332 /* For Ada unit, we prefer the linkage name over the name, as
3333 the former contains the exported name, which the user expects
3334 to be able to reference. Ideally, we want the user to be able
3335 to reference this entity using either natural or linkage name,
3336 but we haven't started looking at this enhancement yet. */
3337 struct attribute *attr;
3339 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
3341 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
3342 if (attr && DW_STRING (attr))
3343 return DW_STRING (attr);
3346 /* These are the only languages we know how to qualify names in. */
3348 && (cu->language == language_cplus || cu->language == language_java
3349 || cu->language == language_fortran))
3351 if (die_needs_namespace (die, cu))
3355 struct ui_file *buf;
3357 prefix = determine_prefix (die, cu);
3358 buf = mem_fileopen ();
3359 if (*prefix != '\0')
3361 char *prefixed_name = typename_concat (NULL, prefix, name,
3364 fputs_unfiltered (prefixed_name, buf);
3365 xfree (prefixed_name);
3368 fputs_unfiltered (name ? name : "", buf);
3370 /* For Java and C++ methods, append formal parameter type
3371 information, if PHYSNAME. */
3373 if (physname && die->tag == DW_TAG_subprogram
3374 && (cu->language == language_cplus
3375 || cu->language == language_java))
3377 struct type *type = read_type_die (die, cu);
3379 c_type_print_args (type, buf, 0, cu->language);
3381 if (cu->language == language_java)
3383 /* For java, we must append the return type to method
3385 if (die->tag == DW_TAG_subprogram)
3386 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
3389 else if (cu->language == language_cplus)
3391 if (TYPE_NFIELDS (type) > 0
3392 && TYPE_FIELD_ARTIFICIAL (type, 0)
3393 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0))))
3394 fputs_unfiltered (" const", buf);
3398 name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
3400 ui_file_delete (buf);
3402 if (cu->language == language_cplus)
3405 = dwarf2_canonicalize_name (name, cu,
3406 &cu->objfile->objfile_obstack);
3417 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3418 If scope qualifiers are appropriate they will be added. The result
3419 will be allocated on the objfile_obstack, or NULL if the DIE does
3420 not have a name. NAME may either be from a previous call to
3421 dwarf2_name or NULL.
3423 The output string will be canonicalized (if C++/Java). */
3426 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
3428 return dwarf2_compute_name (name, die, cu, 0);
3431 /* Construct a physname for the given DIE in CU. NAME may either be
3432 from a previous call to dwarf2_name or NULL. The result will be
3433 allocated on the objfile_objstack or NULL if the DIE does not have a
3436 The output string will be canonicalized (if C++/Java). */
3439 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
3441 return dwarf2_compute_name (name, die, cu, 1);
3444 /* Read the import statement specified by the given die and record it. */
3447 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
3449 struct attribute *import_attr;
3450 struct die_info *imported_die;
3451 struct dwarf2_cu *imported_cu;
3452 const char *imported_name;
3453 const char *imported_name_prefix;
3454 const char *canonical_name;
3455 const char *import_alias;
3456 const char *imported_declaration = NULL;
3457 const char *import_prefix;
3461 import_attr = dwarf2_attr (die, DW_AT_import, cu);
3462 if (import_attr == NULL)
3464 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
3465 dwarf_tag_name (die->tag));
3470 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
3471 imported_name = dwarf2_name (imported_die, imported_cu);
3472 if (imported_name == NULL)
3474 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3476 The import in the following code:
3490 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3491 <52> DW_AT_decl_file : 1
3492 <53> DW_AT_decl_line : 6
3493 <54> DW_AT_import : <0x75>
3494 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3496 <5b> DW_AT_decl_file : 1
3497 <5c> DW_AT_decl_line : 2
3498 <5d> DW_AT_type : <0x6e>
3500 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3501 <76> DW_AT_byte_size : 4
3502 <77> DW_AT_encoding : 5 (signed)
3504 imports the wrong die ( 0x75 instead of 0x58 ).
3505 This case will be ignored until the gcc bug is fixed. */
3509 /* Figure out the local name after import. */
3510 import_alias = dwarf2_name (die, cu);
3512 /* Figure out where the statement is being imported to. */
3513 import_prefix = determine_prefix (die, cu);
3515 /* Figure out what the scope of the imported die is and prepend it
3516 to the name of the imported die. */
3517 imported_name_prefix = determine_prefix (imported_die, imported_cu);
3519 if (imported_die->tag != DW_TAG_namespace
3520 && imported_die->tag != DW_TAG_module)
3522 imported_declaration = imported_name;
3523 canonical_name = imported_name_prefix;
3525 else if (strlen (imported_name_prefix) > 0)
3527 temp = alloca (strlen (imported_name_prefix)
3528 + 2 + strlen (imported_name) + 1);
3529 strcpy (temp, imported_name_prefix);
3530 strcat (temp, "::");
3531 strcat (temp, imported_name);
3532 canonical_name = temp;
3535 canonical_name = imported_name;
3537 cp_add_using_directive (import_prefix,
3540 imported_declaration,
3541 &cu->objfile->objfile_obstack);
3545 initialize_cu_func_list (struct dwarf2_cu *cu)
3547 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
3551 free_cu_line_header (void *arg)
3553 struct dwarf2_cu *cu = arg;
3555 free_line_header (cu->line_header);
3556 cu->line_header = NULL;
3560 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
3562 struct objfile *objfile = cu->objfile;
3563 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3564 CORE_ADDR lowpc = ((CORE_ADDR) -1);
3565 CORE_ADDR highpc = ((CORE_ADDR) 0);
3566 struct attribute *attr;
3568 char *comp_dir = NULL;
3569 struct die_info *child_die;
3570 bfd *abfd = objfile->obfd;
3571 struct line_header *line_header = 0;
3574 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3576 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
3578 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3579 from finish_block. */
3580 if (lowpc == ((CORE_ADDR) -1))
3585 /* Find the filename. Do not use dwarf2_name here, since the filename
3586 is not a source language identifier. */
3587 attr = dwarf2_attr (die, DW_AT_name, cu);
3590 name = DW_STRING (attr);
3593 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3595 comp_dir = DW_STRING (attr);
3596 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3598 comp_dir = ldirname (name);
3599 if (comp_dir != NULL)
3600 make_cleanup (xfree, comp_dir);
3602 if (comp_dir != NULL)
3604 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3605 directory, get rid of it. */
3606 char *cp = strchr (comp_dir, ':');
3608 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
3615 attr = dwarf2_attr (die, DW_AT_language, cu);
3618 set_cu_language (DW_UNSND (attr), cu);
3621 attr = dwarf2_attr (die, DW_AT_producer, cu);
3623 cu->producer = DW_STRING (attr);
3625 /* We assume that we're processing GCC output. */
3626 processing_gcc_compilation = 2;
3628 processing_has_namespace_info = 0;
3630 start_symtab (name, comp_dir, lowpc);
3631 record_debugformat ("DWARF 2");
3632 record_producer (cu->producer);
3634 initialize_cu_func_list (cu);
3636 /* Decode line number information if present. We do this before
3637 processing child DIEs, so that the line header table is available
3638 for DW_AT_decl_file. */
3639 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
3642 unsigned int line_offset = DW_UNSND (attr);
3643 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
3646 cu->line_header = line_header;
3647 make_cleanup (free_cu_line_header, cu);
3648 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
3652 /* Process all dies in compilation unit. */
3653 if (die->child != NULL)
3655 child_die = die->child;
3656 while (child_die && child_die->tag)
3658 process_die (child_die, cu);
3659 child_die = sibling_die (child_die);
3663 /* Decode macro information, if present. Dwarf 2 macro information
3664 refers to information in the line number info statement program
3665 header, so we can only read it if we've read the header
3667 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
3668 if (attr && line_header)
3670 unsigned int macro_offset = DW_UNSND (attr);
3672 dwarf_decode_macros (line_header, macro_offset,
3673 comp_dir, abfd, cu);
3675 do_cleanups (back_to);
3678 /* For TUs we want to skip the first top level sibling if it's not the
3679 actual type being defined by this TU. In this case the first top
3680 level sibling is there to provide context only. */
3683 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
3685 struct objfile *objfile = cu->objfile;
3686 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3688 struct attribute *attr;
3690 char *comp_dir = NULL;
3691 struct die_info *child_die;
3692 bfd *abfd = objfile->obfd;
3694 /* start_symtab needs a low pc, but we don't really have one.
3695 Do what read_file_scope would do in the absence of such info. */
3696 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3698 /* Find the filename. Do not use dwarf2_name here, since the filename
3699 is not a source language identifier. */
3700 attr = dwarf2_attr (die, DW_AT_name, cu);
3702 name = DW_STRING (attr);
3704 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3706 comp_dir = DW_STRING (attr);
3707 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3709 comp_dir = ldirname (name);
3710 if (comp_dir != NULL)
3711 make_cleanup (xfree, comp_dir);
3717 attr = dwarf2_attr (die, DW_AT_language, cu);
3719 set_cu_language (DW_UNSND (attr), cu);
3721 /* This isn't technically needed today. It is done for symmetry
3722 with read_file_scope. */
3723 attr = dwarf2_attr (die, DW_AT_producer, cu);
3725 cu->producer = DW_STRING (attr);
3727 /* We assume that we're processing GCC output. */
3728 processing_gcc_compilation = 2;
3730 processing_has_namespace_info = 0;
3732 start_symtab (name, comp_dir, lowpc);
3733 record_debugformat ("DWARF 2");
3734 record_producer (cu->producer);
3736 /* Process the dies in the type unit. */
3737 if (die->child == NULL)
3739 dump_die_for_error (die);
3740 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3741 bfd_get_filename (abfd));
3744 child_die = die->child;
3746 while (child_die && child_die->tag)
3748 process_die (child_die, cu);
3750 child_die = sibling_die (child_die);
3753 do_cleanups (back_to);
3757 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
3758 struct dwarf2_cu *cu)
3760 struct function_range *thisfn;
3762 thisfn = (struct function_range *)
3763 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
3764 thisfn->name = name;
3765 thisfn->lowpc = lowpc;
3766 thisfn->highpc = highpc;
3767 thisfn->seen_line = 0;
3768 thisfn->next = NULL;
3770 if (cu->last_fn == NULL)
3771 cu->first_fn = thisfn;
3773 cu->last_fn->next = thisfn;
3775 cu->last_fn = thisfn;
3778 /* qsort helper for inherit_abstract_dies. */
3781 unsigned_int_compar (const void *ap, const void *bp)
3783 unsigned int a = *(unsigned int *) ap;
3784 unsigned int b = *(unsigned int *) bp;
3786 return (a > b) - (b > a);
3789 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3790 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3791 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3794 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
3796 struct die_info *child_die;
3797 unsigned die_children_count;
3798 /* CU offsets which were referenced by children of the current DIE. */
3800 unsigned *offsets_end, *offsetp;
3801 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3802 struct die_info *origin_die;
3803 /* Iterator of the ORIGIN_DIE children. */
3804 struct die_info *origin_child_die;
3805 struct cleanup *cleanups;
3806 struct attribute *attr;
3808 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
3812 origin_die = follow_die_ref (die, attr, &cu);
3813 if (die->tag != origin_die->tag
3814 && !(die->tag == DW_TAG_inlined_subroutine
3815 && origin_die->tag == DW_TAG_subprogram))
3816 complaint (&symfile_complaints,
3817 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3818 die->offset, origin_die->offset);
3820 child_die = die->child;
3821 die_children_count = 0;
3822 while (child_die && child_die->tag)
3824 child_die = sibling_die (child_die);
3825 die_children_count++;
3827 offsets = xmalloc (sizeof (*offsets) * die_children_count);
3828 cleanups = make_cleanup (xfree, offsets);
3830 offsets_end = offsets;
3831 child_die = die->child;
3832 while (child_die && child_die->tag)
3834 /* For each CHILD_DIE, find the corresponding child of
3835 ORIGIN_DIE. If there is more than one layer of
3836 DW_AT_abstract_origin, follow them all; there shouldn't be,
3837 but GCC versions at least through 4.4 generate this (GCC PR
3839 struct die_info *child_origin_die = child_die;
3843 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
3846 child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
3849 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3850 counterpart may exist. */
3851 if (child_origin_die != child_die)
3853 if (child_die->tag != child_origin_die->tag
3854 && !(child_die->tag == DW_TAG_inlined_subroutine
3855 && child_origin_die->tag == DW_TAG_subprogram))
3856 complaint (&symfile_complaints,
3857 _("Child DIE 0x%x and its abstract origin 0x%x have "
3858 "different tags"), child_die->offset,
3859 child_origin_die->offset);
3860 if (child_origin_die->parent != origin_die)
3861 complaint (&symfile_complaints,
3862 _("Child DIE 0x%x and its abstract origin 0x%x have "
3863 "different parents"), child_die->offset,
3864 child_origin_die->offset);
3866 *offsets_end++ = child_origin_die->offset;
3868 child_die = sibling_die (child_die);
3870 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
3871 unsigned_int_compar);
3872 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
3873 if (offsetp[-1] == *offsetp)
3874 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
3875 "to DIE 0x%x as their abstract origin"),
3876 die->offset, *offsetp);
3879 origin_child_die = origin_die->child;
3880 while (origin_child_die && origin_child_die->tag)
3882 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3883 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
3885 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
3887 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3888 process_die (origin_child_die, cu);
3890 origin_child_die = sibling_die (origin_child_die);
3893 do_cleanups (cleanups);
3897 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
3899 struct objfile *objfile = cu->objfile;
3900 struct context_stack *new;
3903 struct die_info *child_die;
3904 struct attribute *attr, *call_line, *call_file;
3907 struct block *block;
3908 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
3912 /* If we do not have call site information, we can't show the
3913 caller of this inlined function. That's too confusing, so
3914 only use the scope for local variables. */
3915 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
3916 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
3917 if (call_line == NULL || call_file == NULL)
3919 read_lexical_block_scope (die, cu);
3924 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3926 name = dwarf2_name (die, cu);
3928 /* Ignore functions with missing or empty names. These are actually
3929 illegal according to the DWARF standard. */
3932 complaint (&symfile_complaints,
3933 _("missing name for subprogram DIE at %d"), die->offset);
3937 /* Ignore functions with missing or invalid low and high pc attributes. */
3938 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3940 attr = dwarf2_attr (die, DW_AT_external, cu);
3941 if (!attr || !DW_UNSND (attr))
3942 complaint (&symfile_complaints,
3943 _("cannot get low and high bounds for subprogram DIE at %d"),
3951 /* Record the function range for dwarf_decode_lines. */
3952 add_to_cu_func_list (name, lowpc, highpc, cu);
3954 new = push_context (0, lowpc);
3955 new->name = new_symbol (die, read_type_die (die, cu), cu);
3957 /* If there is a location expression for DW_AT_frame_base, record
3959 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
3961 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3962 expression is being recorded directly in the function's symbol
3963 and not in a separate frame-base object. I guess this hack is
3964 to avoid adding some sort of frame-base adjunct/annex to the
3965 function's symbol :-(. The problem with doing this is that it
3966 results in a function symbol with a location expression that
3967 has nothing to do with the location of the function, ouch! The
3968 relationship should be: a function's symbol has-a frame base; a
3969 frame-base has-a location expression. */
3970 dwarf2_symbol_mark_computed (attr, new->name, cu);
3972 cu->list_in_scope = &local_symbols;
3974 if (die->child != NULL)
3976 child_die = die->child;
3977 while (child_die && child_die->tag)
3979 process_die (child_die, cu);
3980 child_die = sibling_die (child_die);
3984 inherit_abstract_dies (die, cu);
3986 /* If we have a DW_AT_specification, we might need to import using
3987 directives from the context of the specification DIE. See the
3988 comment in determine_prefix. */
3989 if (cu->language == language_cplus
3990 && dwarf2_attr (die, DW_AT_specification, cu))
3992 struct dwarf2_cu *spec_cu = cu;
3993 struct die_info *spec_die = die_specification (die, &spec_cu);
3997 child_die = spec_die->child;
3998 while (child_die && child_die->tag)
4000 if (child_die->tag == DW_TAG_imported_module)
4001 process_die (child_die, spec_cu);
4002 child_die = sibling_die (child_die);
4005 /* In some cases, GCC generates specification DIEs that
4006 themselves contain DW_AT_specification attributes. */
4007 spec_die = die_specification (spec_die, &spec_cu);
4011 new = pop_context ();
4012 /* Make a block for the local symbols within. */
4013 block = finish_block (new->name, &local_symbols, new->old_blocks,
4014 lowpc, highpc, objfile);
4016 /* For C++, set the block's scope. */
4017 if (cu->language == language_cplus || cu->language == language_fortran)
4018 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
4019 determine_prefix (die, cu),
4020 processing_has_namespace_info);
4022 /* If we have address ranges, record them. */
4023 dwarf2_record_block_ranges (die, block, baseaddr, cu);
4025 /* In C++, we can have functions nested inside functions (e.g., when
4026 a function declares a class that has methods). This means that
4027 when we finish processing a function scope, we may need to go
4028 back to building a containing block's symbol lists. */
4029 local_symbols = new->locals;
4030 param_symbols = new->params;
4031 using_directives = new->using_directives;
4033 /* If we've finished processing a top-level function, subsequent
4034 symbols go in the file symbol list. */
4035 if (outermost_context_p ())
4036 cu->list_in_scope = &file_symbols;
4039 /* Process all the DIES contained within a lexical block scope. Start
4040 a new scope, process the dies, and then close the scope. */
4043 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
4045 struct objfile *objfile = cu->objfile;
4046 struct context_stack *new;
4047 CORE_ADDR lowpc, highpc;
4048 struct die_info *child_die;
4051 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4053 /* Ignore blocks with missing or invalid low and high pc attributes. */
4054 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4055 as multiple lexical blocks? Handling children in a sane way would
4056 be nasty. Might be easier to properly extend generic blocks to
4058 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
4063 push_context (0, lowpc);
4064 if (die->child != NULL)
4066 child_die = die->child;
4067 while (child_die && child_die->tag)
4069 process_die (child_die, cu);
4070 child_die = sibling_die (child_die);
4073 new = pop_context ();
4075 if (local_symbols != NULL || using_directives != NULL)
4078 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
4081 /* Note that recording ranges after traversing children, as we
4082 do here, means that recording a parent's ranges entails
4083 walking across all its children's ranges as they appear in
4084 the address map, which is quadratic behavior.
4086 It would be nicer to record the parent's ranges before
4087 traversing its children, simply overriding whatever you find
4088 there. But since we don't even decide whether to create a
4089 block until after we've traversed its children, that's hard
4091 dwarf2_record_block_ranges (die, block, baseaddr, cu);
4093 local_symbols = new->locals;
4094 using_directives = new->using_directives;
4097 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4098 Return 1 if the attributes are present and valid, otherwise, return 0.
4099 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4102 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
4103 CORE_ADDR *high_return, struct dwarf2_cu *cu,
4104 struct partial_symtab *ranges_pst)
4106 struct objfile *objfile = cu->objfile;
4107 struct comp_unit_head *cu_header = &cu->header;
4108 bfd *obfd = objfile->obfd;
4109 unsigned int addr_size = cu_header->addr_size;
4110 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4111 /* Base address selection entry. */
4122 found_base = cu->base_known;
4123 base = cu->base_address;
4125 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
4126 if (offset >= dwarf2_per_objfile->ranges.size)
4128 complaint (&symfile_complaints,
4129 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4133 buffer = dwarf2_per_objfile->ranges.buffer + offset;
4135 /* Read in the largest possible address. */
4136 marker = read_address (obfd, buffer, cu, &dummy);
4137 if ((marker & mask) == mask)
4139 /* If we found the largest possible address, then
4140 read the base address. */
4141 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4142 buffer += 2 * addr_size;
4143 offset += 2 * addr_size;
4149 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4153 CORE_ADDR range_beginning, range_end;
4155 range_beginning = read_address (obfd, buffer, cu, &dummy);
4156 buffer += addr_size;
4157 range_end = read_address (obfd, buffer, cu, &dummy);
4158 buffer += addr_size;
4159 offset += 2 * addr_size;
4161 /* An end of list marker is a pair of zero addresses. */
4162 if (range_beginning == 0 && range_end == 0)
4163 /* Found the end of list entry. */
4166 /* Each base address selection entry is a pair of 2 values.
4167 The first is the largest possible address, the second is
4168 the base address. Check for a base address here. */
4169 if ((range_beginning & mask) == mask)
4171 /* If we found the largest possible address, then
4172 read the base address. */
4173 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4180 /* We have no valid base address for the ranges
4182 complaint (&symfile_complaints,
4183 _("Invalid .debug_ranges data (no base address)"));
4187 range_beginning += base;
4190 if (ranges_pst != NULL && range_beginning < range_end)
4191 addrmap_set_empty (objfile->psymtabs_addrmap,
4192 range_beginning + baseaddr, range_end - 1 + baseaddr,
4195 /* FIXME: This is recording everything as a low-high
4196 segment of consecutive addresses. We should have a
4197 data structure for discontiguous block ranges
4201 low = range_beginning;
4207 if (range_beginning < low)
4208 low = range_beginning;
4209 if (range_end > high)
4215 /* If the first entry is an end-of-list marker, the range
4216 describes an empty scope, i.e. no instructions. */
4222 *high_return = high;
4226 /* Get low and high pc attributes from a die. Return 1 if the attributes
4227 are present and valid, otherwise, return 0. Return -1 if the range is
4228 discontinuous, i.e. derived from DW_AT_ranges information. */
4230 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
4231 CORE_ADDR *highpc, struct dwarf2_cu *cu,
4232 struct partial_symtab *pst)
4234 struct attribute *attr;
4239 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4242 high = DW_ADDR (attr);
4243 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4245 low = DW_ADDR (attr);
4247 /* Found high w/o low attribute. */
4250 /* Found consecutive range of addresses. */
4255 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4258 /* Value of the DW_AT_ranges attribute is the offset in the
4259 .debug_ranges section. */
4260 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
4262 /* Found discontinuous range of addresses. */
4270 /* When using the GNU linker, .gnu.linkonce. sections are used to
4271 eliminate duplicate copies of functions and vtables and such.
4272 The linker will arbitrarily choose one and discard the others.
4273 The AT_*_pc values for such functions refer to local labels in
4274 these sections. If the section from that file was discarded, the
4275 labels are not in the output, so the relocs get a value of 0.
4276 If this is a discarded function, mark the pc bounds as invalid,
4277 so that GDB will ignore it. */
4278 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
4286 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4287 its low and high PC addresses. Do nothing if these addresses could not
4288 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4289 and HIGHPC to the high address if greater than HIGHPC. */
4292 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
4293 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4294 struct dwarf2_cu *cu)
4296 CORE_ADDR low, high;
4297 struct die_info *child = die->child;
4299 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
4301 *lowpc = min (*lowpc, low);
4302 *highpc = max (*highpc, high);
4305 /* If the language does not allow nested subprograms (either inside
4306 subprograms or lexical blocks), we're done. */
4307 if (cu->language != language_ada)
4310 /* Check all the children of the given DIE. If it contains nested
4311 subprograms, then check their pc bounds. Likewise, we need to
4312 check lexical blocks as well, as they may also contain subprogram
4314 while (child && child->tag)
4316 if (child->tag == DW_TAG_subprogram
4317 || child->tag == DW_TAG_lexical_block)
4318 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
4319 child = sibling_die (child);
4323 /* Get the low and high pc's represented by the scope DIE, and store
4324 them in *LOWPC and *HIGHPC. If the correct values can't be
4325 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4328 get_scope_pc_bounds (struct die_info *die,
4329 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4330 struct dwarf2_cu *cu)
4332 CORE_ADDR best_low = (CORE_ADDR) -1;
4333 CORE_ADDR best_high = (CORE_ADDR) 0;
4334 CORE_ADDR current_low, current_high;
4336 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
4338 best_low = current_low;
4339 best_high = current_high;
4343 struct die_info *child = die->child;
4345 while (child && child->tag)
4347 switch (child->tag) {
4348 case DW_TAG_subprogram:
4349 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
4351 case DW_TAG_namespace:
4353 /* FIXME: carlton/2004-01-16: Should we do this for
4354 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4355 that current GCC's always emit the DIEs corresponding
4356 to definitions of methods of classes as children of a
4357 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4358 the DIEs giving the declarations, which could be
4359 anywhere). But I don't see any reason why the
4360 standards says that they have to be there. */
4361 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
4363 if (current_low != ((CORE_ADDR) -1))
4365 best_low = min (best_low, current_low);
4366 best_high = max (best_high, current_high);
4374 child = sibling_die (child);
4379 *highpc = best_high;
4382 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4385 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
4386 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
4388 struct attribute *attr;
4390 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4393 CORE_ADDR high = DW_ADDR (attr);
4395 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4398 CORE_ADDR low = DW_ADDR (attr);
4400 record_block_range (block, baseaddr + low, baseaddr + high - 1);
4404 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4407 bfd *obfd = cu->objfile->obfd;
4409 /* The value of the DW_AT_ranges attribute is the offset of the
4410 address range list in the .debug_ranges section. */
4411 unsigned long offset = DW_UNSND (attr);
4412 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
4414 /* For some target architectures, but not others, the
4415 read_address function sign-extends the addresses it returns.
4416 To recognize base address selection entries, we need a
4418 unsigned int addr_size = cu->header.addr_size;
4419 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4421 /* The base address, to which the next pair is relative. Note
4422 that this 'base' is a DWARF concept: most entries in a range
4423 list are relative, to reduce the number of relocs against the
4424 debugging information. This is separate from this function's
4425 'baseaddr' argument, which GDB uses to relocate debugging
4426 information from a shared library based on the address at
4427 which the library was loaded. */
4428 CORE_ADDR base = cu->base_address;
4429 int base_known = cu->base_known;
4431 gdb_assert (dwarf2_per_objfile->ranges.readin);
4432 if (offset >= dwarf2_per_objfile->ranges.size)
4434 complaint (&symfile_complaints,
4435 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4442 unsigned int bytes_read;
4443 CORE_ADDR start, end;
4445 start = read_address (obfd, buffer, cu, &bytes_read);
4446 buffer += bytes_read;
4447 end = read_address (obfd, buffer, cu, &bytes_read);
4448 buffer += bytes_read;
4450 /* Did we find the end of the range list? */
4451 if (start == 0 && end == 0)
4454 /* Did we find a base address selection entry? */
4455 else if ((start & base_select_mask) == base_select_mask)
4461 /* We found an ordinary address range. */
4466 complaint (&symfile_complaints,
4467 _("Invalid .debug_ranges data (no base address)"));
4471 record_block_range (block,
4472 baseaddr + base + start,
4473 baseaddr + base + end - 1);
4479 /* Add an aggregate field to the field list. */
4482 dwarf2_add_field (struct field_info *fip, struct die_info *die,
4483 struct dwarf2_cu *cu)
4485 struct objfile *objfile = cu->objfile;
4486 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4487 struct nextfield *new_field;
4488 struct attribute *attr;
4490 char *fieldname = "";
4492 /* Allocate a new field list entry and link it in. */
4493 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4494 make_cleanup (xfree, new_field);
4495 memset (new_field, 0, sizeof (struct nextfield));
4497 if (die->tag == DW_TAG_inheritance)
4499 new_field->next = fip->baseclasses;
4500 fip->baseclasses = new_field;
4504 new_field->next = fip->fields;
4505 fip->fields = new_field;
4509 /* Handle accessibility and virtuality of field.
4510 The default accessibility for members is public, the default
4511 accessibility for inheritance is private. */
4512 if (die->tag != DW_TAG_inheritance)
4513 new_field->accessibility = DW_ACCESS_public;
4515 new_field->accessibility = DW_ACCESS_private;
4516 new_field->virtuality = DW_VIRTUALITY_none;
4518 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4520 new_field->accessibility = DW_UNSND (attr);
4521 if (new_field->accessibility != DW_ACCESS_public)
4522 fip->non_public_fields = 1;
4523 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4525 new_field->virtuality = DW_UNSND (attr);
4527 fp = &new_field->field;
4529 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
4531 /* Data member other than a C++ static data member. */
4533 /* Get type of field. */
4534 fp->type = die_type (die, cu);
4536 SET_FIELD_BITPOS (*fp, 0);
4538 /* Get bit size of field (zero if none). */
4539 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
4542 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
4546 FIELD_BITSIZE (*fp) = 0;
4549 /* Get bit offset of field. */
4550 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4553 int byte_offset = 0;
4555 if (attr_form_is_section_offset (attr))
4556 dwarf2_complex_location_expr_complaint ();
4557 else if (attr_form_is_constant (attr))
4558 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4559 else if (attr_form_is_block (attr))
4560 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4562 dwarf2_complex_location_expr_complaint ();
4564 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4566 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
4569 if (gdbarch_bits_big_endian (gdbarch))
4571 /* For big endian bits, the DW_AT_bit_offset gives the
4572 additional bit offset from the MSB of the containing
4573 anonymous object to the MSB of the field. We don't
4574 have to do anything special since we don't need to
4575 know the size of the anonymous object. */
4576 FIELD_BITPOS (*fp) += DW_UNSND (attr);
4580 /* For little endian bits, compute the bit offset to the
4581 MSB of the anonymous object, subtract off the number of
4582 bits from the MSB of the field to the MSB of the
4583 object, and then subtract off the number of bits of
4584 the field itself. The result is the bit offset of
4585 the LSB of the field. */
4587 int bit_offset = DW_UNSND (attr);
4589 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4592 /* The size of the anonymous object containing
4593 the bit field is explicit, so use the
4594 indicated size (in bytes). */
4595 anonymous_size = DW_UNSND (attr);
4599 /* The size of the anonymous object containing
4600 the bit field must be inferred from the type
4601 attribute of the data member containing the
4603 anonymous_size = TYPE_LENGTH (fp->type);
4605 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
4606 - bit_offset - FIELD_BITSIZE (*fp);
4610 /* Get name of field. */
4611 fieldname = dwarf2_name (die, cu);
4612 if (fieldname == NULL)
4615 /* The name is already allocated along with this objfile, so we don't
4616 need to duplicate it for the type. */
4617 fp->name = fieldname;
4619 /* Change accessibility for artificial fields (e.g. virtual table
4620 pointer or virtual base class pointer) to private. */
4621 if (dwarf2_attr (die, DW_AT_artificial, cu))
4623 FIELD_ARTIFICIAL (*fp) = 1;
4624 new_field->accessibility = DW_ACCESS_private;
4625 fip->non_public_fields = 1;
4628 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
4630 /* C++ static member. */
4632 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4633 is a declaration, but all versions of G++ as of this writing
4634 (so through at least 3.2.1) incorrectly generate
4635 DW_TAG_variable tags. */
4639 /* Get name of field. */
4640 fieldname = dwarf2_name (die, cu);
4641 if (fieldname == NULL)
4644 attr = dwarf2_attr (die, DW_AT_const_value, cu);
4646 /* Only create a symbol if this is an external value.
4647 new_symbol checks this and puts the value in the global symbol
4648 table, which we want. If it is not external, new_symbol
4649 will try to put the value in cu->list_in_scope which is wrong. */
4650 && dwarf2_flag_true_p (die, DW_AT_external, cu))
4652 /* A static const member, not much different than an enum as far as
4653 we're concerned, except that we can support more types. */
4654 new_symbol (die, NULL, cu);
4657 /* Get physical name. */
4658 physname = (char *) dwarf2_physname (fieldname, die, cu);
4660 /* The name is already allocated along with this objfile, so we don't
4661 need to duplicate it for the type. */
4662 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
4663 FIELD_TYPE (*fp) = die_type (die, cu);
4664 FIELD_NAME (*fp) = fieldname;
4666 else if (die->tag == DW_TAG_inheritance)
4668 /* C++ base class field. */
4669 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4672 int byte_offset = 0;
4674 if (attr_form_is_section_offset (attr))
4675 dwarf2_complex_location_expr_complaint ();
4676 else if (attr_form_is_constant (attr))
4677 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4678 else if (attr_form_is_block (attr))
4679 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4681 dwarf2_complex_location_expr_complaint ();
4683 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4685 FIELD_BITSIZE (*fp) = 0;
4686 FIELD_TYPE (*fp) = die_type (die, cu);
4687 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
4688 fip->nbaseclasses++;
4692 /* Add a typedef defined in the scope of the FIP's class. */
4695 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
4696 struct dwarf2_cu *cu)
4698 struct objfile *objfile = cu->objfile;
4699 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4700 struct typedef_field_list *new_field;
4701 struct attribute *attr;
4702 struct typedef_field *fp;
4703 char *fieldname = "";
4705 /* Allocate a new field list entry and link it in. */
4706 new_field = xzalloc (sizeof (*new_field));
4707 make_cleanup (xfree, new_field);
4709 gdb_assert (die->tag == DW_TAG_typedef);
4711 fp = &new_field->field;
4713 /* Get name of field. */
4714 fp->name = dwarf2_name (die, cu);
4715 if (fp->name == NULL)
4718 fp->type = read_type_die (die, cu);
4720 new_field->next = fip->typedef_field_list;
4721 fip->typedef_field_list = new_field;
4722 fip->typedef_field_list_count++;
4725 /* Create the vector of fields, and attach it to the type. */
4728 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
4729 struct dwarf2_cu *cu)
4731 int nfields = fip->nfields;
4733 /* Record the field count, allocate space for the array of fields,
4734 and create blank accessibility bitfields if necessary. */
4735 TYPE_NFIELDS (type) = nfields;
4736 TYPE_FIELDS (type) = (struct field *)
4737 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4738 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4740 if (fip->non_public_fields && cu->language != language_ada)
4742 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4744 TYPE_FIELD_PRIVATE_BITS (type) =
4745 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4746 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4748 TYPE_FIELD_PROTECTED_BITS (type) =
4749 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4750 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4752 TYPE_FIELD_IGNORE_BITS (type) =
4753 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4754 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4757 /* If the type has baseclasses, allocate and clear a bit vector for
4758 TYPE_FIELD_VIRTUAL_BITS. */
4759 if (fip->nbaseclasses && cu->language != language_ada)
4761 int num_bytes = B_BYTES (fip->nbaseclasses);
4762 unsigned char *pointer;
4764 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4765 pointer = TYPE_ALLOC (type, num_bytes);
4766 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
4767 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
4768 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
4771 /* Copy the saved-up fields into the field vector. Start from the head
4772 of the list, adding to the tail of the field array, so that they end
4773 up in the same order in the array in which they were added to the list. */
4774 while (nfields-- > 0)
4776 struct nextfield *fieldp;
4780 fieldp = fip->fields;
4781 fip->fields = fieldp->next;
4785 fieldp = fip->baseclasses;
4786 fip->baseclasses = fieldp->next;
4789 TYPE_FIELD (type, nfields) = fieldp->field;
4790 switch (fieldp->accessibility)
4792 case DW_ACCESS_private:
4793 if (cu->language != language_ada)
4794 SET_TYPE_FIELD_PRIVATE (type, nfields);
4797 case DW_ACCESS_protected:
4798 if (cu->language != language_ada)
4799 SET_TYPE_FIELD_PROTECTED (type, nfields);
4802 case DW_ACCESS_public:
4806 /* Unknown accessibility. Complain and treat it as public. */
4808 complaint (&symfile_complaints, _("unsupported accessibility %d"),
4809 fieldp->accessibility);
4813 if (nfields < fip->nbaseclasses)
4815 switch (fieldp->virtuality)
4817 case DW_VIRTUALITY_virtual:
4818 case DW_VIRTUALITY_pure_virtual:
4819 if (cu->language == language_ada)
4820 error ("unexpected virtuality in component of Ada type");
4821 SET_TYPE_FIELD_VIRTUAL (type, nfields);
4828 /* Add a member function to the proper fieldlist. */
4831 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
4832 struct type *type, struct dwarf2_cu *cu)
4834 struct objfile *objfile = cu->objfile;
4835 struct attribute *attr;
4836 struct fnfieldlist *flp;
4838 struct fn_field *fnp;
4841 struct nextfnfield *new_fnfield;
4842 struct type *this_type;
4844 if (cu->language == language_ada)
4845 error ("unexpected member function in Ada type");
4847 /* Get name of member function. */
4848 fieldname = dwarf2_name (die, cu);
4849 if (fieldname == NULL)
4852 /* Get the mangled name. */
4853 physname = (char *) dwarf2_physname (fieldname, die, cu);
4855 /* Look up member function name in fieldlist. */
4856 for (i = 0; i < fip->nfnfields; i++)
4858 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
4862 /* Create new list element if necessary. */
4863 if (i < fip->nfnfields)
4864 flp = &fip->fnfieldlists[i];
4867 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
4869 fip->fnfieldlists = (struct fnfieldlist *)
4870 xrealloc (fip->fnfieldlists,
4871 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
4872 * sizeof (struct fnfieldlist));
4873 if (fip->nfnfields == 0)
4874 make_cleanup (free_current_contents, &fip->fnfieldlists);
4876 flp = &fip->fnfieldlists[fip->nfnfields];
4877 flp->name = fieldname;
4883 /* Create a new member function field and chain it to the field list
4885 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
4886 make_cleanup (xfree, new_fnfield);
4887 memset (new_fnfield, 0, sizeof (struct nextfnfield));
4888 new_fnfield->next = flp->head;
4889 flp->head = new_fnfield;
4892 /* Fill in the member function field info. */
4893 fnp = &new_fnfield->fnfield;
4894 /* The name is already allocated along with this objfile, so we don't
4895 need to duplicate it for the type. */
4896 fnp->physname = physname ? physname : "";
4897 fnp->type = alloc_type (objfile);
4898 this_type = read_type_die (die, cu);
4899 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
4901 int nparams = TYPE_NFIELDS (this_type);
4903 /* TYPE is the domain of this method, and THIS_TYPE is the type
4904 of the method itself (TYPE_CODE_METHOD). */
4905 smash_to_method_type (fnp->type, type,
4906 TYPE_TARGET_TYPE (this_type),
4907 TYPE_FIELDS (this_type),
4908 TYPE_NFIELDS (this_type),
4909 TYPE_VARARGS (this_type));
4911 /* Handle static member functions.
4912 Dwarf2 has no clean way to discern C++ static and non-static
4913 member functions. G++ helps GDB by marking the first
4914 parameter for non-static member functions (which is the
4915 this pointer) as artificial. We obtain this information
4916 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4917 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
4918 fnp->voffset = VOFFSET_STATIC;
4921 complaint (&symfile_complaints, _("member function type missing for '%s'"),
4924 /* Get fcontext from DW_AT_containing_type if present. */
4925 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4926 fnp->fcontext = die_containing_type (die, cu);
4928 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4929 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4931 /* Get accessibility. */
4932 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4935 switch (DW_UNSND (attr))
4937 case DW_ACCESS_private:
4938 fnp->is_private = 1;
4940 case DW_ACCESS_protected:
4941 fnp->is_protected = 1;
4946 /* Check for artificial methods. */
4947 attr = dwarf2_attr (die, DW_AT_artificial, cu);
4948 if (attr && DW_UNSND (attr) != 0)
4949 fnp->is_artificial = 1;
4951 /* Get index in virtual function table if it is a virtual member
4952 function. For older versions of GCC, this is an offset in the
4953 appropriate virtual table, as specified by DW_AT_containing_type.
4954 For everyone else, it is an expression to be evaluated relative
4955 to the object address. */
4957 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
4960 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
4962 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
4964 /* Old-style GCC. */
4965 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
4967 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
4968 || (DW_BLOCK (attr)->size > 1
4969 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
4970 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
4972 struct dwarf_block blk;
4975 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
4977 blk.size = DW_BLOCK (attr)->size - offset;
4978 blk.data = DW_BLOCK (attr)->data + offset;
4979 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
4980 if ((fnp->voffset % cu->header.addr_size) != 0)
4981 dwarf2_complex_location_expr_complaint ();
4983 fnp->voffset /= cu->header.addr_size;
4987 dwarf2_complex_location_expr_complaint ();
4990 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
4992 else if (attr_form_is_section_offset (attr))
4994 dwarf2_complex_location_expr_complaint ();
4998 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
5004 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
5005 if (attr && DW_UNSND (attr))
5007 /* GCC does this, as of 2008-08-25; PR debug/37237. */
5008 complaint (&symfile_complaints,
5009 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
5010 fieldname, die->offset);
5011 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5012 TYPE_CPLUS_DYNAMIC (type) = 1;
5017 /* Create the vector of member function fields, and attach it to the type. */
5020 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
5021 struct dwarf2_cu *cu)
5023 struct fnfieldlist *flp;
5024 int total_length = 0;
5027 if (cu->language == language_ada)
5028 error ("unexpected member functions in Ada type");
5030 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5031 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
5032 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
5034 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
5036 struct nextfnfield *nfp = flp->head;
5037 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
5040 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
5041 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
5042 fn_flp->fn_fields = (struct fn_field *)
5043 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
5044 for (k = flp->length; (k--, nfp); nfp = nfp->next)
5045 fn_flp->fn_fields[k] = nfp->fnfield;
5047 total_length += flp->length;
5050 TYPE_NFN_FIELDS (type) = fip->nfnfields;
5051 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
5054 /* Returns non-zero if NAME is the name of a vtable member in CU's
5055 language, zero otherwise. */
5057 is_vtable_name (const char *name, struct dwarf2_cu *cu)
5059 static const char vptr[] = "_vptr";
5060 static const char vtable[] = "vtable";
5062 /* Look for the C++ and Java forms of the vtable. */
5063 if ((cu->language == language_java
5064 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
5065 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
5066 && is_cplus_marker (name[sizeof (vptr) - 1])))
5072 /* GCC outputs unnamed structures that are really pointers to member
5073 functions, with the ABI-specified layout. If TYPE describes
5074 such a structure, smash it into a member function type.
5076 GCC shouldn't do this; it should just output pointer to member DIEs.
5077 This is GCC PR debug/28767. */
5080 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
5082 struct type *pfn_type, *domain_type, *new_type;
5084 /* Check for a structure with no name and two children. */
5085 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
5088 /* Check for __pfn and __delta members. */
5089 if (TYPE_FIELD_NAME (type, 0) == NULL
5090 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
5091 || TYPE_FIELD_NAME (type, 1) == NULL
5092 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
5095 /* Find the type of the method. */
5096 pfn_type = TYPE_FIELD_TYPE (type, 0);
5097 if (pfn_type == NULL
5098 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
5099 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
5102 /* Look for the "this" argument. */
5103 pfn_type = TYPE_TARGET_TYPE (pfn_type);
5104 if (TYPE_NFIELDS (pfn_type) == 0
5105 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5106 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
5109 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
5110 new_type = alloc_type (objfile);
5111 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
5112 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
5113 TYPE_VARARGS (pfn_type));
5114 smash_to_methodptr_type (type, new_type);
5117 /* Called when we find the DIE that starts a structure or union scope
5118 (definition) to process all dies that define the members of the
5121 NOTE: we need to call struct_type regardless of whether or not the
5122 DIE has an at_name attribute, since it might be an anonymous
5123 structure or union. This gets the type entered into our set of
5126 However, if the structure is incomplete (an opaque struct/union)
5127 then suppress creating a symbol table entry for it since gdb only
5128 wants to find the one with the complete definition. Note that if
5129 it is complete, we just call new_symbol, which does it's own
5130 checking about whether the struct/union is anonymous or not (and
5131 suppresses creating a symbol table entry itself). */
5133 static struct type *
5134 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
5136 struct objfile *objfile = cu->objfile;
5138 struct attribute *attr;
5140 struct cleanup *back_to;
5142 /* If the definition of this type lives in .debug_types, read that type.
5143 Don't follow DW_AT_specification though, that will take us back up
5144 the chain and we want to go down. */
5145 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5148 struct dwarf2_cu *type_cu = cu;
5149 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5151 /* We could just recurse on read_structure_type, but we need to call
5152 get_die_type to ensure only one type for this DIE is created.
5153 This is important, for example, because for c++ classes we need
5154 TYPE_NAME set which is only done by new_symbol. Blech. */
5155 type = read_type_die (type_die, type_cu);
5156 return set_die_type (die, type, cu);
5159 back_to = make_cleanup (null_cleanup, 0);
5161 type = alloc_type (objfile);
5162 INIT_CPLUS_SPECIFIC (type);
5164 name = dwarf2_name (die, cu);
5167 if (cu->language == language_cplus
5168 || cu->language == language_java)
5170 TYPE_TAG_NAME (type) = (char *) dwarf2_full_name (name, die, cu);
5171 if (die->tag == DW_TAG_structure_type
5172 || die->tag == DW_TAG_class_type)
5173 TYPE_NAME (type) = TYPE_TAG_NAME (type);
5177 /* The name is already allocated along with this objfile, so
5178 we don't need to duplicate it for the type. */
5179 TYPE_TAG_NAME (type) = (char *) name;
5180 if (die->tag == DW_TAG_class_type)
5181 TYPE_NAME (type) = TYPE_TAG_NAME (type);
5185 if (die->tag == DW_TAG_structure_type)
5187 TYPE_CODE (type) = TYPE_CODE_STRUCT;
5189 else if (die->tag == DW_TAG_union_type)
5191 TYPE_CODE (type) = TYPE_CODE_UNION;
5195 TYPE_CODE (type) = TYPE_CODE_CLASS;
5198 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
5199 TYPE_DECLARED_CLASS (type) = 1;
5201 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5204 TYPE_LENGTH (type) = DW_UNSND (attr);
5208 TYPE_LENGTH (type) = 0;
5211 TYPE_STUB_SUPPORTED (type) = 1;
5212 if (die_is_declaration (die, cu))
5213 TYPE_STUB (type) = 1;
5214 else if (attr == NULL && die->child == NULL
5215 && producer_is_realview (cu->producer))
5216 /* RealView does not output the required DW_AT_declaration
5217 on incomplete types. */
5218 TYPE_STUB (type) = 1;
5220 /* We need to add the type field to the die immediately so we don't
5221 infinitely recurse when dealing with pointers to the structure
5222 type within the structure itself. */
5223 set_die_type (die, type, cu);
5225 /* set_die_type should be already done. */
5226 set_descriptive_type (type, die, cu);
5228 if (die->child != NULL && ! die_is_declaration (die, cu))
5230 struct field_info fi;
5231 struct die_info *child_die;
5233 memset (&fi, 0, sizeof (struct field_info));
5235 child_die = die->child;
5237 while (child_die && child_die->tag)
5239 if (child_die->tag == DW_TAG_member
5240 || child_die->tag == DW_TAG_variable)
5242 /* NOTE: carlton/2002-11-05: A C++ static data member
5243 should be a DW_TAG_member that is a declaration, but
5244 all versions of G++ as of this writing (so through at
5245 least 3.2.1) incorrectly generate DW_TAG_variable
5246 tags for them instead. */
5247 dwarf2_add_field (&fi, child_die, cu);
5249 else if (child_die->tag == DW_TAG_subprogram)
5251 /* C++ member function. */
5252 dwarf2_add_member_fn (&fi, child_die, type, cu);
5254 else if (child_die->tag == DW_TAG_inheritance)
5256 /* C++ base class field. */
5257 dwarf2_add_field (&fi, child_die, cu);
5259 else if (child_die->tag == DW_TAG_typedef)
5260 dwarf2_add_typedef (&fi, child_die, cu);
5261 child_die = sibling_die (child_die);
5264 /* Attach fields and member functions to the type. */
5266 dwarf2_attach_fields_to_type (&fi, type, cu);
5269 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
5271 /* Get the type which refers to the base class (possibly this
5272 class itself) which contains the vtable pointer for the current
5273 class from the DW_AT_containing_type attribute. This use of
5274 DW_AT_containing_type is a GNU extension. */
5276 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
5278 struct type *t = die_containing_type (die, cu);
5280 TYPE_VPTR_BASETYPE (type) = t;
5285 /* Our own class provides vtbl ptr. */
5286 for (i = TYPE_NFIELDS (t) - 1;
5287 i >= TYPE_N_BASECLASSES (t);
5290 char *fieldname = TYPE_FIELD_NAME (t, i);
5292 if (is_vtable_name (fieldname, cu))
5294 TYPE_VPTR_FIELDNO (type) = i;
5299 /* Complain if virtual function table field not found. */
5300 if (i < TYPE_N_BASECLASSES (t))
5301 complaint (&symfile_complaints,
5302 _("virtual function table pointer not found when defining class '%s'"),
5303 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
5308 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
5311 else if (cu->producer
5312 && strncmp (cu->producer,
5313 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5315 /* The IBM XLC compiler does not provide direct indication
5316 of the containing type, but the vtable pointer is
5317 always named __vfp. */
5321 for (i = TYPE_NFIELDS (type) - 1;
5322 i >= TYPE_N_BASECLASSES (type);
5325 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
5327 TYPE_VPTR_FIELDNO (type) = i;
5328 TYPE_VPTR_BASETYPE (type) = type;
5335 /* Copy fi.typedef_field_list linked list elements content into the
5336 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
5337 if (fi.typedef_field_list)
5339 int i = fi.typedef_field_list_count;
5341 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5342 TYPE_TYPEDEF_FIELD_ARRAY (type)
5343 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
5344 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
5346 /* Reverse the list order to keep the debug info elements order. */
5349 struct typedef_field *dest, *src;
5351 dest = &TYPE_TYPEDEF_FIELD (type, i);
5352 src = &fi.typedef_field_list->field;
5353 fi.typedef_field_list = fi.typedef_field_list->next;
5359 quirk_gcc_member_function_pointer (type, cu->objfile);
5361 do_cleanups (back_to);
5366 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
5368 struct die_info *child_die = die->child;
5369 struct type *this_type;
5371 this_type = get_die_type (die, cu);
5372 if (this_type == NULL)
5373 this_type = read_structure_type (die, cu);
5375 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5376 snapshots) has been known to create a die giving a declaration
5377 for a class that has, as a child, a die giving a definition for a
5378 nested class. So we have to process our children even if the
5379 current die is a declaration. Normally, of course, a declaration
5380 won't have any children at all. */
5382 while (child_die != NULL && child_die->tag)
5384 if (child_die->tag == DW_TAG_member
5385 || child_die->tag == DW_TAG_variable
5386 || child_die->tag == DW_TAG_inheritance)
5391 process_die (child_die, cu);
5393 child_die = sibling_die (child_die);
5396 /* Do not consider external references. According to the DWARF standard,
5397 these DIEs are identified by the fact that they have no byte_size
5398 attribute, and a declaration attribute. */
5399 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
5400 || !die_is_declaration (die, cu))
5401 new_symbol (die, this_type, cu);
5404 /* Given a DW_AT_enumeration_type die, set its type. We do not
5405 complete the type's fields yet, or create any symbols. */
5407 static struct type *
5408 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
5410 struct objfile *objfile = cu->objfile;
5412 struct attribute *attr;
5415 /* If the definition of this type lives in .debug_types, read that type.
5416 Don't follow DW_AT_specification though, that will take us back up
5417 the chain and we want to go down. */
5418 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5421 struct dwarf2_cu *type_cu = cu;
5422 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5424 type = read_type_die (type_die, type_cu);
5425 return set_die_type (die, type, cu);
5428 type = alloc_type (objfile);
5430 TYPE_CODE (type) = TYPE_CODE_ENUM;
5431 name = dwarf2_full_name (NULL, die, cu);
5433 TYPE_TAG_NAME (type) = (char *) name;
5435 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5438 TYPE_LENGTH (type) = DW_UNSND (attr);
5442 TYPE_LENGTH (type) = 0;
5445 /* The enumeration DIE can be incomplete. In Ada, any type can be
5446 declared as private in the package spec, and then defined only
5447 inside the package body. Such types are known as Taft Amendment
5448 Types. When another package uses such a type, an incomplete DIE
5449 may be generated by the compiler. */
5450 if (die_is_declaration (die, cu))
5451 TYPE_STUB (type) = 1;
5453 return set_die_type (die, type, cu);
5456 /* Given a pointer to a die which begins an enumeration, process all
5457 the dies that define the members of the enumeration, and create the
5458 symbol for the enumeration type.
5460 NOTE: We reverse the order of the element list. */
5463 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
5465 struct die_info *child_die;
5466 struct field *fields;
5469 int unsigned_enum = 1;
5471 struct type *this_type;
5475 this_type = get_die_type (die, cu);
5476 if (this_type == NULL)
5477 this_type = read_enumeration_type (die, cu);
5478 if (die->child != NULL)
5480 child_die = die->child;
5481 while (child_die && child_die->tag)
5483 if (child_die->tag != DW_TAG_enumerator)
5485 process_die (child_die, cu);
5489 name = dwarf2_name (child_die, cu);
5492 sym = new_symbol (child_die, this_type, cu);
5493 if (SYMBOL_VALUE (sym) < 0)
5496 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
5498 fields = (struct field *)
5500 (num_fields + DW_FIELD_ALLOC_CHUNK)
5501 * sizeof (struct field));
5504 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
5505 FIELD_TYPE (fields[num_fields]) = NULL;
5506 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
5507 FIELD_BITSIZE (fields[num_fields]) = 0;
5513 child_die = sibling_die (child_die);
5518 TYPE_NFIELDS (this_type) = num_fields;
5519 TYPE_FIELDS (this_type) = (struct field *)
5520 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
5521 memcpy (TYPE_FIELDS (this_type), fields,
5522 sizeof (struct field) * num_fields);
5526 TYPE_UNSIGNED (this_type) = 1;
5529 new_symbol (die, this_type, cu);
5532 /* Extract all information from a DW_TAG_array_type DIE and put it in
5533 the DIE's type field. For now, this only handles one dimensional
5536 static struct type *
5537 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
5539 struct objfile *objfile = cu->objfile;
5540 struct die_info *child_die;
5542 struct type *element_type, *range_type, *index_type;
5543 struct type **range_types = NULL;
5544 struct attribute *attr;
5546 struct cleanup *back_to;
5549 element_type = die_type (die, cu);
5551 /* The die_type call above may have already set the type for this DIE. */
5552 type = get_die_type (die, cu);
5556 /* Irix 6.2 native cc creates array types without children for
5557 arrays with unspecified length. */
5558 if (die->child == NULL)
5560 index_type = objfile_type (objfile)->builtin_int;
5561 range_type = create_range_type (NULL, index_type, 0, -1);
5562 type = create_array_type (NULL, element_type, range_type);
5563 return set_die_type (die, type, cu);
5566 back_to = make_cleanup (null_cleanup, NULL);
5567 child_die = die->child;
5568 while (child_die && child_die->tag)
5570 if (child_die->tag == DW_TAG_subrange_type)
5572 struct type *child_type = read_type_die (child_die, cu);
5574 if (child_type != NULL)
5576 /* The range type was succesfully read. Save it for
5577 the array type creation. */
5578 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
5580 range_types = (struct type **)
5581 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
5582 * sizeof (struct type *));
5584 make_cleanup (free_current_contents, &range_types);
5586 range_types[ndim++] = child_type;
5589 child_die = sibling_die (child_die);
5592 /* Dwarf2 dimensions are output from left to right, create the
5593 necessary array types in backwards order. */
5595 type = element_type;
5597 if (read_array_order (die, cu) == DW_ORD_col_major)
5602 type = create_array_type (NULL, type, range_types[i++]);
5607 type = create_array_type (NULL, type, range_types[ndim]);
5610 /* Understand Dwarf2 support for vector types (like they occur on
5611 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5612 array type. This is not part of the Dwarf2/3 standard yet, but a
5613 custom vendor extension. The main difference between a regular
5614 array and the vector variant is that vectors are passed by value
5616 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
5618 make_vector_type (type);
5620 name = dwarf2_name (die, cu);
5622 TYPE_NAME (type) = name;
5624 /* Install the type in the die. */
5625 set_die_type (die, type, cu);
5627 /* set_die_type should be already done. */
5628 set_descriptive_type (type, die, cu);
5630 do_cleanups (back_to);
5635 static enum dwarf_array_dim_ordering
5636 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
5638 struct attribute *attr;
5640 attr = dwarf2_attr (die, DW_AT_ordering, cu);
5642 if (attr) return DW_SND (attr);
5645 GNU F77 is a special case, as at 08/2004 array type info is the
5646 opposite order to the dwarf2 specification, but data is still
5647 laid out as per normal fortran.
5649 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5653 if (cu->language == language_fortran
5654 && cu->producer && strstr (cu->producer, "GNU F77"))
5656 return DW_ORD_row_major;
5659 switch (cu->language_defn->la_array_ordering)
5661 case array_column_major:
5662 return DW_ORD_col_major;
5663 case array_row_major:
5665 return DW_ORD_row_major;
5669 /* Extract all information from a DW_TAG_set_type DIE and put it in
5670 the DIE's type field. */
5672 static struct type *
5673 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
5675 struct type *domain_type, *set_type;
5676 struct attribute *attr;
5678 domain_type = die_type (die, cu);
5680 /* The die_type call above may have already set the type for this DIE. */
5681 set_type = get_die_type (die, cu);
5685 set_type = create_set_type (NULL, domain_type);
5687 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5689 TYPE_LENGTH (set_type) = DW_UNSND (attr);
5691 return set_die_type (die, set_type, cu);
5694 /* First cut: install each common block member as a global variable. */
5697 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
5699 struct die_info *child_die;
5700 struct attribute *attr;
5702 CORE_ADDR base = (CORE_ADDR) 0;
5704 attr = dwarf2_attr (die, DW_AT_location, cu);
5707 /* Support the .debug_loc offsets */
5708 if (attr_form_is_block (attr))
5710 base = decode_locdesc (DW_BLOCK (attr), cu);
5712 else if (attr_form_is_section_offset (attr))
5714 dwarf2_complex_location_expr_complaint ();
5718 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5719 "common block member");
5722 if (die->child != NULL)
5724 child_die = die->child;
5725 while (child_die && child_die->tag)
5727 sym = new_symbol (child_die, NULL, cu);
5728 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
5731 CORE_ADDR byte_offset = 0;
5733 if (attr_form_is_section_offset (attr))
5734 dwarf2_complex_location_expr_complaint ();
5735 else if (attr_form_is_constant (attr))
5736 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
5737 else if (attr_form_is_block (attr))
5738 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
5740 dwarf2_complex_location_expr_complaint ();
5742 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
5743 add_symbol_to_list (sym, &global_symbols);
5745 child_die = sibling_die (child_die);
5750 /* Create a type for a C++ namespace. */
5752 static struct type *
5753 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
5755 struct objfile *objfile = cu->objfile;
5756 const char *previous_prefix, *name;
5760 /* For extensions, reuse the type of the original namespace. */
5761 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
5763 struct die_info *ext_die;
5764 struct dwarf2_cu *ext_cu = cu;
5766 ext_die = dwarf2_extension (die, &ext_cu);
5767 type = read_type_die (ext_die, ext_cu);
5768 return set_die_type (die, type, cu);
5771 name = namespace_name (die, &is_anonymous, cu);
5773 /* Now build the name of the current namespace. */
5775 previous_prefix = determine_prefix (die, cu);
5776 if (previous_prefix[0] != '\0')
5777 name = typename_concat (&objfile->objfile_obstack,
5778 previous_prefix, name, 0, cu);
5780 /* Create the type. */
5781 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
5783 TYPE_NAME (type) = (char *) name;
5784 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5786 return set_die_type (die, type, cu);
5789 /* Read a C++ namespace. */
5792 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
5794 struct objfile *objfile = cu->objfile;
5798 /* Add a symbol associated to this if we haven't seen the namespace
5799 before. Also, add a using directive if it's an anonymous
5802 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
5806 type = read_type_die (die, cu);
5807 new_symbol (die, type, cu);
5809 name = namespace_name (die, &is_anonymous, cu);
5812 const char *previous_prefix = determine_prefix (die, cu);
5814 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
5815 NULL, &objfile->objfile_obstack);
5819 if (die->child != NULL)
5821 struct die_info *child_die = die->child;
5823 while (child_die && child_die->tag)
5825 process_die (child_die, cu);
5826 child_die = sibling_die (child_die);
5831 /* Read a Fortran module as type. This DIE can be only a declaration used for
5832 imported module. Still we need that type as local Fortran "use ... only"
5833 declaration imports depend on the created type in determine_prefix. */
5835 static struct type *
5836 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
5838 struct objfile *objfile = cu->objfile;
5842 module_name = dwarf2_name (die, cu);
5844 complaint (&symfile_complaints, _("DW_TAG_module has no name, offset 0x%x"),
5846 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
5848 /* determine_prefix uses TYPE_TAG_NAME. */
5849 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5851 return set_die_type (die, type, cu);
5854 /* Read a Fortran module. */
5857 read_module (struct die_info *die, struct dwarf2_cu *cu)
5859 struct die_info *child_die = die->child;
5861 while (child_die && child_die->tag)
5863 process_die (child_die, cu);
5864 child_die = sibling_die (child_die);
5868 /* Return the name of the namespace represented by DIE. Set
5869 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5873 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
5875 struct die_info *current_die;
5876 const char *name = NULL;
5878 /* Loop through the extensions until we find a name. */
5880 for (current_die = die;
5881 current_die != NULL;
5882 current_die = dwarf2_extension (die, &cu))
5884 name = dwarf2_name (current_die, cu);
5889 /* Is it an anonymous namespace? */
5891 *is_anonymous = (name == NULL);
5893 name = "(anonymous namespace)";
5898 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5899 the user defined type vector. */
5901 static struct type *
5902 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
5904 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
5905 struct comp_unit_head *cu_header = &cu->header;
5907 struct attribute *attr_byte_size;
5908 struct attribute *attr_address_class;
5909 int byte_size, addr_class;
5910 struct type *target_type;
5912 target_type = die_type (die, cu);
5914 /* The die_type call above may have already set the type for this DIE. */
5915 type = get_die_type (die, cu);
5919 type = lookup_pointer_type (target_type);
5921 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
5923 byte_size = DW_UNSND (attr_byte_size);
5925 byte_size = cu_header->addr_size;
5927 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
5928 if (attr_address_class)
5929 addr_class = DW_UNSND (attr_address_class);
5931 addr_class = DW_ADDR_none;
5933 /* If the pointer size or address class is different than the
5934 default, create a type variant marked as such and set the
5935 length accordingly. */
5936 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
5938 if (gdbarch_address_class_type_flags_p (gdbarch))
5942 type_flags = gdbarch_address_class_type_flags
5943 (gdbarch, byte_size, addr_class);
5944 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
5946 type = make_type_with_address_space (type, type_flags);
5948 else if (TYPE_LENGTH (type) != byte_size)
5950 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
5954 /* Should we also complain about unhandled address classes? */
5958 TYPE_LENGTH (type) = byte_size;
5959 return set_die_type (die, type, cu);
5962 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5963 the user defined type vector. */
5965 static struct type *
5966 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
5969 struct type *to_type;
5970 struct type *domain;
5972 to_type = die_type (die, cu);
5973 domain = die_containing_type (die, cu);
5975 /* The calls above may have already set the type for this DIE. */
5976 type = get_die_type (die, cu);
5980 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
5981 type = lookup_methodptr_type (to_type);
5983 type = lookup_memberptr_type (to_type, domain);
5985 return set_die_type (die, type, cu);
5988 /* Extract all information from a DW_TAG_reference_type DIE and add to
5989 the user defined type vector. */
5991 static struct type *
5992 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
5994 struct comp_unit_head *cu_header = &cu->header;
5995 struct type *type, *target_type;
5996 struct attribute *attr;
5998 target_type = die_type (die, cu);
6000 /* The die_type call above may have already set the type for this DIE. */
6001 type = get_die_type (die, cu);
6005 type = lookup_reference_type (target_type);
6006 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6009 TYPE_LENGTH (type) = DW_UNSND (attr);
6013 TYPE_LENGTH (type) = cu_header->addr_size;
6015 return set_die_type (die, type, cu);
6018 static struct type *
6019 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
6021 struct type *base_type, *cv_type;
6023 base_type = die_type (die, cu);
6025 /* The die_type call above may have already set the type for this DIE. */
6026 cv_type = get_die_type (die, cu);
6030 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
6031 return set_die_type (die, cv_type, cu);
6034 static struct type *
6035 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
6037 struct type *base_type, *cv_type;
6039 base_type = die_type (die, cu);
6041 /* The die_type call above may have already set the type for this DIE. */
6042 cv_type = get_die_type (die, cu);
6046 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
6047 return set_die_type (die, cv_type, cu);
6050 /* Extract all information from a DW_TAG_string_type DIE and add to
6051 the user defined type vector. It isn't really a user defined type,
6052 but it behaves like one, with other DIE's using an AT_user_def_type
6053 attribute to reference it. */
6055 static struct type *
6056 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
6058 struct objfile *objfile = cu->objfile;
6059 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6060 struct type *type, *range_type, *index_type, *char_type;
6061 struct attribute *attr;
6062 unsigned int length;
6064 attr = dwarf2_attr (die, DW_AT_string_length, cu);
6067 length = DW_UNSND (attr);
6071 /* check for the DW_AT_byte_size attribute */
6072 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6075 length = DW_UNSND (attr);
6083 index_type = objfile_type (objfile)->builtin_int;
6084 range_type = create_range_type (NULL, index_type, 1, length);
6085 char_type = language_string_char_type (cu->language_defn, gdbarch);
6086 type = create_string_type (NULL, char_type, range_type);
6088 return set_die_type (die, type, cu);
6091 /* Handle DIES due to C code like:
6095 int (*funcp)(int a, long l);
6099 ('funcp' generates a DW_TAG_subroutine_type DIE)
6102 static struct type *
6103 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
6105 struct type *type; /* Type that this function returns */
6106 struct type *ftype; /* Function that returns above type */
6107 struct attribute *attr;
6109 type = die_type (die, cu);
6111 /* The die_type call above may have already set the type for this DIE. */
6112 ftype = get_die_type (die, cu);
6116 ftype = lookup_function_type (type);
6118 /* All functions in C++, Pascal and Java have prototypes. */
6119 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
6120 if ((attr && (DW_UNSND (attr) != 0))
6121 || cu->language == language_cplus
6122 || cu->language == language_java
6123 || cu->language == language_pascal)
6124 TYPE_PROTOTYPED (ftype) = 1;
6125 else if (producer_is_realview (cu->producer))
6126 /* RealView does not emit DW_AT_prototyped. We can not
6127 distinguish prototyped and unprototyped functions; default to
6128 prototyped, since that is more common in modern code (and
6129 RealView warns about unprototyped functions). */
6130 TYPE_PROTOTYPED (ftype) = 1;
6132 /* Store the calling convention in the type if it's available in
6133 the subroutine die. Otherwise set the calling convention to
6134 the default value DW_CC_normal. */
6135 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
6136 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
6138 /* We need to add the subroutine type to the die immediately so
6139 we don't infinitely recurse when dealing with parameters
6140 declared as the same subroutine type. */
6141 set_die_type (die, ftype, cu);
6143 if (die->child != NULL)
6145 struct type *void_type = objfile_type (cu->objfile)->builtin_void;
6146 struct die_info *child_die;
6147 int nparams, iparams;
6149 /* Count the number of parameters.
6150 FIXME: GDB currently ignores vararg functions, but knows about
6151 vararg member functions. */
6153 child_die = die->child;
6154 while (child_die && child_die->tag)
6156 if (child_die->tag == DW_TAG_formal_parameter)
6158 else if (child_die->tag == DW_TAG_unspecified_parameters)
6159 TYPE_VARARGS (ftype) = 1;
6160 child_die = sibling_die (child_die);
6163 /* Allocate storage for parameters and fill them in. */
6164 TYPE_NFIELDS (ftype) = nparams;
6165 TYPE_FIELDS (ftype) = (struct field *)
6166 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
6168 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
6169 even if we error out during the parameters reading below. */
6170 for (iparams = 0; iparams < nparams; iparams++)
6171 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
6174 child_die = die->child;
6175 while (child_die && child_die->tag)
6177 if (child_die->tag == DW_TAG_formal_parameter)
6179 /* Dwarf2 has no clean way to discern C++ static and non-static
6180 member functions. G++ helps GDB by marking the first
6181 parameter for non-static member functions (which is the
6182 this pointer) as artificial. We pass this information
6183 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
6184 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
6186 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
6189 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
6191 /* GCC/43521: In java, the formal parameter
6192 "this" is sometimes not marked with DW_AT_artificial. */
6193 if (cu->language == language_java)
6195 const char *name = dwarf2_name (child_die, cu);
6197 if (name && !strcmp (name, "this"))
6198 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
6201 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
6204 child_die = sibling_die (child_die);
6211 static struct type *
6212 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
6214 struct objfile *objfile = cu->objfile;
6215 const char *name = NULL;
6216 struct type *this_type;
6218 name = dwarf2_full_name (NULL, die, cu);
6219 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
6220 TYPE_FLAG_TARGET_STUB, NULL, objfile);
6221 TYPE_NAME (this_type) = (char *) name;
6222 set_die_type (die, this_type, cu);
6223 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
6227 /* Find a representation of a given base type and install
6228 it in the TYPE field of the die. */
6230 static struct type *
6231 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
6233 struct objfile *objfile = cu->objfile;
6235 struct attribute *attr;
6236 int encoding = 0, size = 0;
6238 enum type_code code = TYPE_CODE_INT;
6240 struct type *target_type = NULL;
6242 attr = dwarf2_attr (die, DW_AT_encoding, cu);
6245 encoding = DW_UNSND (attr);
6247 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6250 size = DW_UNSND (attr);
6252 name = dwarf2_name (die, cu);
6255 complaint (&symfile_complaints,
6256 _("DW_AT_name missing from DW_TAG_base_type"));
6261 case DW_ATE_address:
6262 /* Turn DW_ATE_address into a void * pointer. */
6263 code = TYPE_CODE_PTR;
6264 type_flags |= TYPE_FLAG_UNSIGNED;
6265 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
6267 case DW_ATE_boolean:
6268 code = TYPE_CODE_BOOL;
6269 type_flags |= TYPE_FLAG_UNSIGNED;
6271 case DW_ATE_complex_float:
6272 code = TYPE_CODE_COMPLEX;
6273 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
6275 case DW_ATE_decimal_float:
6276 code = TYPE_CODE_DECFLOAT;
6279 code = TYPE_CODE_FLT;
6283 case DW_ATE_unsigned:
6284 type_flags |= TYPE_FLAG_UNSIGNED;
6286 case DW_ATE_signed_char:
6287 if (cu->language == language_ada || cu->language == language_m2
6288 || cu->language == language_pascal)
6289 code = TYPE_CODE_CHAR;
6291 case DW_ATE_unsigned_char:
6292 if (cu->language == language_ada || cu->language == language_m2
6293 || cu->language == language_pascal)
6294 code = TYPE_CODE_CHAR;
6295 type_flags |= TYPE_FLAG_UNSIGNED;
6298 /* We just treat this as an integer and then recognize the
6299 type by name elsewhere. */
6303 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
6304 dwarf_type_encoding_name (encoding));
6308 type = init_type (code, size, type_flags, NULL, objfile);
6309 TYPE_NAME (type) = name;
6310 TYPE_TARGET_TYPE (type) = target_type;
6312 if (name && strcmp (name, "char") == 0)
6313 TYPE_NOSIGN (type) = 1;
6315 return set_die_type (die, type, cu);
6318 /* Read the given DW_AT_subrange DIE. */
6320 static struct type *
6321 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
6323 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
6324 struct type *base_type;
6325 struct type *range_type;
6326 struct attribute *attr;
6330 LONGEST negative_mask;
6332 base_type = die_type (die, cu);
6334 /* The die_type call above may have already set the type for this DIE. */
6335 range_type = get_die_type (die, cu);
6339 if (cu->language == language_fortran)
6341 /* FORTRAN implies a lower bound of 1, if not given. */
6345 /* FIXME: For variable sized arrays either of these could be
6346 a variable rather than a constant value. We'll allow it,
6347 but we don't know how to handle it. */
6348 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
6350 low = dwarf2_get_attr_constant_value (attr, 0);
6352 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
6355 if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
6357 /* GCC encodes arrays with unspecified or dynamic length
6358 with a DW_FORM_block1 attribute or a reference attribute.
6359 FIXME: GDB does not yet know how to handle dynamic
6360 arrays properly, treat them as arrays with unspecified
6363 FIXME: jimb/2003-09-22: GDB does not really know
6364 how to handle arrays of unspecified length
6365 either; we just represent them as zero-length
6366 arrays. Choose an appropriate upper bound given
6367 the lower bound we've computed above. */
6371 high = dwarf2_get_attr_constant_value (attr, 1);
6375 attr = dwarf2_attr (die, DW_AT_count, cu);
6378 int count = dwarf2_get_attr_constant_value (attr, 1);
6379 high = low + count - 1;
6383 /* Dwarf-2 specifications explicitly allows to create subrange types
6384 without specifying a base type.
6385 In that case, the base type must be set to the type of
6386 the lower bound, upper bound or count, in that order, if any of these
6387 three attributes references an object that has a type.
6388 If no base type is found, the Dwarf-2 specifications say that
6389 a signed integer type of size equal to the size of an address should
6391 For the following C code: `extern char gdb_int [];'
6392 GCC produces an empty range DIE.
6393 FIXME: muller/2010-05-28: Possible references to object for low bound,
6394 high bound or count are not yet handled by this code.
6396 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
6398 struct objfile *objfile = cu->objfile;
6399 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6400 int addr_size = gdbarch_addr_bit (gdbarch) /8;
6401 struct type *int_type = objfile_type (objfile)->builtin_int;
6403 /* Test "int", "long int", and "long long int" objfile types,
6404 and select the first one having a size above or equal to the
6405 architecture address size. */
6406 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
6407 base_type = int_type;
6410 int_type = objfile_type (objfile)->builtin_long;
6411 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
6412 base_type = int_type;
6415 int_type = objfile_type (objfile)->builtin_long_long;
6416 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
6417 base_type = int_type;
6423 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
6424 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
6425 low |= negative_mask;
6426 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
6427 high |= negative_mask;
6429 range_type = create_range_type (NULL, base_type, low, high);
6431 /* Mark arrays with dynamic length at least as an array of unspecified
6432 length. GDB could check the boundary but before it gets implemented at
6433 least allow accessing the array elements. */
6434 if (attr && attr->form == DW_FORM_block1)
6435 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
6437 name = dwarf2_name (die, cu);
6439 TYPE_NAME (range_type) = name;
6441 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6443 TYPE_LENGTH (range_type) = DW_UNSND (attr);
6445 set_die_type (die, range_type, cu);
6447 /* set_die_type should be already done. */
6448 set_descriptive_type (range_type, die, cu);
6453 static struct type *
6454 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
6458 /* For now, we only support the C meaning of an unspecified type: void. */
6460 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
6461 TYPE_NAME (type) = dwarf2_name (die, cu);
6463 return set_die_type (die, type, cu);
6466 /* Trivial hash function for die_info: the hash value of a DIE
6467 is its offset in .debug_info for this objfile. */
6470 die_hash (const void *item)
6472 const struct die_info *die = item;
6477 /* Trivial comparison function for die_info structures: two DIEs
6478 are equal if they have the same offset. */
6481 die_eq (const void *item_lhs, const void *item_rhs)
6483 const struct die_info *die_lhs = item_lhs;
6484 const struct die_info *die_rhs = item_rhs;
6486 return die_lhs->offset == die_rhs->offset;
6489 /* Read a whole compilation unit into a linked list of dies. */
6491 static struct die_info *
6492 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
6494 struct die_reader_specs reader_specs;
6496 gdb_assert (cu->die_hash == NULL);
6498 = htab_create_alloc_ex (cu->header.length / 12,
6502 &cu->comp_unit_obstack,
6503 hashtab_obstack_allocate,
6504 dummy_obstack_deallocate);
6506 init_cu_die_reader (&reader_specs, cu);
6508 return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
6511 /* Main entry point for reading a DIE and all children.
6512 Read the DIE and dump it if requested. */
6514 static struct die_info *
6515 read_die_and_children (const struct die_reader_specs *reader,
6517 gdb_byte **new_info_ptr,
6518 struct die_info *parent)
6520 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
6521 new_info_ptr, parent);
6523 if (dwarf2_die_debug)
6525 fprintf_unfiltered (gdb_stdlog,
6526 "\nRead die from %s of %s:\n",
6527 reader->buffer == dwarf2_per_objfile->info.buffer
6529 : reader->buffer == dwarf2_per_objfile->types.buffer
6531 : "unknown section",
6532 reader->abfd->filename);
6533 dump_die (result, dwarf2_die_debug);
6539 /* Read a single die and all its descendents. Set the die's sibling
6540 field to NULL; set other fields in the die correctly, and set all
6541 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6542 location of the info_ptr after reading all of those dies. PARENT
6543 is the parent of the die in question. */
6545 static struct die_info *
6546 read_die_and_children_1 (const struct die_reader_specs *reader,
6548 gdb_byte **new_info_ptr,
6549 struct die_info *parent)
6551 struct die_info *die;
6555 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
6558 *new_info_ptr = cur_ptr;
6561 store_in_ref_table (die, reader->cu);
6564 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
6568 *new_info_ptr = cur_ptr;
6571 die->sibling = NULL;
6572 die->parent = parent;
6576 /* Read a die, all of its descendents, and all of its siblings; set
6577 all of the fields of all of the dies correctly. Arguments are as
6578 in read_die_and_children. */
6580 static struct die_info *
6581 read_die_and_siblings (const struct die_reader_specs *reader,
6583 gdb_byte **new_info_ptr,
6584 struct die_info *parent)
6586 struct die_info *first_die, *last_sibling;
6590 first_die = last_sibling = NULL;
6594 struct die_info *die
6595 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
6599 *new_info_ptr = cur_ptr;
6606 last_sibling->sibling = die;
6612 /* Read the die from the .debug_info section buffer. Set DIEP to
6613 point to a newly allocated die with its information, except for its
6614 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6615 whether the die has children or not. */
6618 read_full_die (const struct die_reader_specs *reader,
6619 struct die_info **diep, gdb_byte *info_ptr,
6622 unsigned int abbrev_number, bytes_read, i, offset;
6623 struct abbrev_info *abbrev;
6624 struct die_info *die;
6625 struct dwarf2_cu *cu = reader->cu;
6626 bfd *abfd = reader->abfd;
6628 offset = info_ptr - reader->buffer;
6629 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6630 info_ptr += bytes_read;
6638 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
6640 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6642 bfd_get_filename (abfd));
6644 die = dwarf_alloc_die (cu, abbrev->num_attrs);
6645 die->offset = offset;
6646 die->tag = abbrev->tag;
6647 die->abbrev = abbrev_number;
6649 die->num_attrs = abbrev->num_attrs;
6651 for (i = 0; i < abbrev->num_attrs; ++i)
6652 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
6653 abfd, info_ptr, cu);
6656 *has_children = abbrev->has_children;
6660 /* In DWARF version 2, the description of the debugging information is
6661 stored in a separate .debug_abbrev section. Before we read any
6662 dies from a section we read in all abbreviations and install them
6663 in a hash table. This function also sets flags in CU describing
6664 the data found in the abbrev table. */
6667 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
6669 struct comp_unit_head *cu_header = &cu->header;
6670 gdb_byte *abbrev_ptr;
6671 struct abbrev_info *cur_abbrev;
6672 unsigned int abbrev_number, bytes_read, abbrev_name;
6673 unsigned int abbrev_form, hash_number;
6674 struct attr_abbrev *cur_attrs;
6675 unsigned int allocated_attrs;
6677 /* Initialize dwarf2 abbrevs */
6678 obstack_init (&cu->abbrev_obstack);
6679 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
6681 * sizeof (struct abbrev_info *)));
6682 memset (cu->dwarf2_abbrevs, 0,
6683 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
6685 dwarf2_read_section (dwarf2_per_objfile->objfile,
6686 &dwarf2_per_objfile->abbrev);
6687 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
6688 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6689 abbrev_ptr += bytes_read;
6691 allocated_attrs = ATTR_ALLOC_CHUNK;
6692 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
6694 /* loop until we reach an abbrev number of 0 */
6695 while (abbrev_number)
6697 cur_abbrev = dwarf_alloc_abbrev (cu);
6699 /* read in abbrev header */
6700 cur_abbrev->number = abbrev_number;
6701 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6702 abbrev_ptr += bytes_read;
6703 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
6706 if (cur_abbrev->tag == DW_TAG_namespace)
6707 cu->has_namespace_info = 1;
6709 /* now read in declarations */
6710 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6711 abbrev_ptr += bytes_read;
6712 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6713 abbrev_ptr += bytes_read;
6716 if (cur_abbrev->num_attrs == allocated_attrs)
6718 allocated_attrs += ATTR_ALLOC_CHUNK;
6720 = xrealloc (cur_attrs, (allocated_attrs
6721 * sizeof (struct attr_abbrev)));
6724 /* Record whether this compilation unit might have
6725 inter-compilation-unit references. If we don't know what form
6726 this attribute will have, then it might potentially be a
6727 DW_FORM_ref_addr, so we conservatively expect inter-CU
6730 if (abbrev_form == DW_FORM_ref_addr
6731 || abbrev_form == DW_FORM_indirect)
6732 cu->has_form_ref_addr = 1;
6734 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
6735 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
6736 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6737 abbrev_ptr += bytes_read;
6738 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6739 abbrev_ptr += bytes_read;
6742 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
6743 (cur_abbrev->num_attrs
6744 * sizeof (struct attr_abbrev)));
6745 memcpy (cur_abbrev->attrs, cur_attrs,
6746 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
6748 hash_number = abbrev_number % ABBREV_HASH_SIZE;
6749 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
6750 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
6752 /* Get next abbreviation.
6753 Under Irix6 the abbreviations for a compilation unit are not
6754 always properly terminated with an abbrev number of 0.
6755 Exit loop if we encounter an abbreviation which we have
6756 already read (which means we are about to read the abbreviations
6757 for the next compile unit) or if the end of the abbreviation
6758 table is reached. */
6759 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
6760 >= dwarf2_per_objfile->abbrev.size)
6762 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6763 abbrev_ptr += bytes_read;
6764 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
6771 /* Release the memory used by the abbrev table for a compilation unit. */
6774 dwarf2_free_abbrev_table (void *ptr_to_cu)
6776 struct dwarf2_cu *cu = ptr_to_cu;
6778 obstack_free (&cu->abbrev_obstack, NULL);
6779 cu->dwarf2_abbrevs = NULL;
6782 /* Lookup an abbrev_info structure in the abbrev hash table. */
6784 static struct abbrev_info *
6785 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
6787 unsigned int hash_number;
6788 struct abbrev_info *abbrev;
6790 hash_number = number % ABBREV_HASH_SIZE;
6791 abbrev = cu->dwarf2_abbrevs[hash_number];
6795 if (abbrev->number == number)
6798 abbrev = abbrev->next;
6803 /* Returns nonzero if TAG represents a type that we might generate a partial
6807 is_type_tag_for_partial (int tag)
6812 /* Some types that would be reasonable to generate partial symbols for,
6813 that we don't at present. */
6814 case DW_TAG_array_type:
6815 case DW_TAG_file_type:
6816 case DW_TAG_ptr_to_member_type:
6817 case DW_TAG_set_type:
6818 case DW_TAG_string_type:
6819 case DW_TAG_subroutine_type:
6821 case DW_TAG_base_type:
6822 case DW_TAG_class_type:
6823 case DW_TAG_interface_type:
6824 case DW_TAG_enumeration_type:
6825 case DW_TAG_structure_type:
6826 case DW_TAG_subrange_type:
6827 case DW_TAG_typedef:
6828 case DW_TAG_union_type:
6835 /* Load all DIEs that are interesting for partial symbols into memory. */
6837 static struct partial_die_info *
6838 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
6839 int building_psymtab, struct dwarf2_cu *cu)
6841 struct partial_die_info *part_die;
6842 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
6843 struct abbrev_info *abbrev;
6844 unsigned int bytes_read;
6845 unsigned int load_all = 0;
6847 int nesting_level = 1;
6852 if (cu->per_cu && cu->per_cu->load_all_dies)
6856 = htab_create_alloc_ex (cu->header.length / 12,
6860 &cu->comp_unit_obstack,
6861 hashtab_obstack_allocate,
6862 dummy_obstack_deallocate);
6864 part_die = obstack_alloc (&cu->comp_unit_obstack,
6865 sizeof (struct partial_die_info));
6869 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6871 /* A NULL abbrev means the end of a series of children. */
6874 if (--nesting_level == 0)
6876 /* PART_DIE was probably the last thing allocated on the
6877 comp_unit_obstack, so we could call obstack_free
6878 here. We don't do that because the waste is small,
6879 and will be cleaned up when we're done with this
6880 compilation unit. This way, we're also more robust
6881 against other users of the comp_unit_obstack. */
6884 info_ptr += bytes_read;
6885 last_die = parent_die;
6886 parent_die = parent_die->die_parent;
6890 /* Check whether this DIE is interesting enough to save. Normally
6891 we would not be interested in members here, but there may be
6892 later variables referencing them via DW_AT_specification (for
6895 && !is_type_tag_for_partial (abbrev->tag)
6896 && abbrev->tag != DW_TAG_enumerator
6897 && abbrev->tag != DW_TAG_subprogram
6898 && abbrev->tag != DW_TAG_lexical_block
6899 && abbrev->tag != DW_TAG_variable
6900 && abbrev->tag != DW_TAG_namespace
6901 && abbrev->tag != DW_TAG_module
6902 && abbrev->tag != DW_TAG_member)
6904 /* Otherwise we skip to the next sibling, if any. */
6905 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
6909 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
6910 buffer, info_ptr, cu);
6912 /* This two-pass algorithm for processing partial symbols has a
6913 high cost in cache pressure. Thus, handle some simple cases
6914 here which cover the majority of C partial symbols. DIEs
6915 which neither have specification tags in them, nor could have
6916 specification tags elsewhere pointing at them, can simply be
6917 processed and discarded.
6919 This segment is also optional; scan_partial_symbols and
6920 add_partial_symbol will handle these DIEs if we chain
6921 them in normally. When compilers which do not emit large
6922 quantities of duplicate debug information are more common,
6923 this code can probably be removed. */
6925 /* Any complete simple types at the top level (pretty much all
6926 of them, for a language without namespaces), can be processed
6928 if (parent_die == NULL
6929 && part_die->has_specification == 0
6930 && part_die->is_declaration == 0
6931 && (part_die->tag == DW_TAG_typedef
6932 || part_die->tag == DW_TAG_base_type
6933 || part_die->tag == DW_TAG_subrange_type))
6935 if (building_psymtab && part_die->name != NULL)
6936 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6937 VAR_DOMAIN, LOC_TYPEDEF,
6938 &cu->objfile->static_psymbols,
6939 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6940 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6944 /* If we're at the second level, and we're an enumerator, and
6945 our parent has no specification (meaning possibly lives in a
6946 namespace elsewhere), then we can add the partial symbol now
6947 instead of queueing it. */
6948 if (part_die->tag == DW_TAG_enumerator
6949 && parent_die != NULL
6950 && parent_die->die_parent == NULL
6951 && parent_die->tag == DW_TAG_enumeration_type
6952 && parent_die->has_specification == 0)
6954 if (part_die->name == NULL)
6955 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6956 else if (building_psymtab)
6957 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6958 VAR_DOMAIN, LOC_CONST,
6959 (cu->language == language_cplus
6960 || cu->language == language_java)
6961 ? &cu->objfile->global_psymbols
6962 : &cu->objfile->static_psymbols,
6963 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6965 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6969 /* We'll save this DIE so link it in. */
6970 part_die->die_parent = parent_die;
6971 part_die->die_sibling = NULL;
6972 part_die->die_child = NULL;
6974 if (last_die && last_die == parent_die)
6975 last_die->die_child = part_die;
6977 last_die->die_sibling = part_die;
6979 last_die = part_die;
6981 if (first_die == NULL)
6982 first_die = part_die;
6984 /* Maybe add the DIE to the hash table. Not all DIEs that we
6985 find interesting need to be in the hash table, because we
6986 also have the parent/sibling/child chains; only those that we
6987 might refer to by offset later during partial symbol reading.
6989 For now this means things that might have be the target of a
6990 DW_AT_specification, DW_AT_abstract_origin, or
6991 DW_AT_extension. DW_AT_extension will refer only to
6992 namespaces; DW_AT_abstract_origin refers to functions (and
6993 many things under the function DIE, but we do not recurse
6994 into function DIEs during partial symbol reading) and
6995 possibly variables as well; DW_AT_specification refers to
6996 declarations. Declarations ought to have the DW_AT_declaration
6997 flag. It happens that GCC forgets to put it in sometimes, but
6998 only for functions, not for types.
7000 Adding more things than necessary to the hash table is harmless
7001 except for the performance cost. Adding too few will result in
7002 wasted time in find_partial_die, when we reread the compilation
7003 unit with load_all_dies set. */
7006 || abbrev->tag == DW_TAG_subprogram
7007 || abbrev->tag == DW_TAG_variable
7008 || abbrev->tag == DW_TAG_namespace
7009 || part_die->is_declaration)
7013 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
7014 part_die->offset, INSERT);
7018 part_die = obstack_alloc (&cu->comp_unit_obstack,
7019 sizeof (struct partial_die_info));
7021 /* For some DIEs we want to follow their children (if any). For C
7022 we have no reason to follow the children of structures; for other
7023 languages we have to, both so that we can get at method physnames
7024 to infer fully qualified class names, and for DW_AT_specification.
7026 For Ada, we need to scan the children of subprograms and lexical
7027 blocks as well because Ada allows the definition of nested
7028 entities that could be interesting for the debugger, such as
7029 nested subprograms for instance. */
7030 if (last_die->has_children
7032 || last_die->tag == DW_TAG_namespace
7033 || last_die->tag == DW_TAG_module
7034 || last_die->tag == DW_TAG_enumeration_type
7035 || (cu->language != language_c
7036 && (last_die->tag == DW_TAG_class_type
7037 || last_die->tag == DW_TAG_interface_type
7038 || last_die->tag == DW_TAG_structure_type
7039 || last_die->tag == DW_TAG_union_type))
7040 || (cu->language == language_ada
7041 && (last_die->tag == DW_TAG_subprogram
7042 || last_die->tag == DW_TAG_lexical_block))))
7045 parent_die = last_die;
7049 /* Otherwise we skip to the next sibling, if any. */
7050 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
7052 /* Back to the top, do it again. */
7056 /* Read a minimal amount of information into the minimal die structure. */
7059 read_partial_die (struct partial_die_info *part_die,
7060 struct abbrev_info *abbrev,
7061 unsigned int abbrev_len, bfd *abfd,
7062 gdb_byte *buffer, gdb_byte *info_ptr,
7063 struct dwarf2_cu *cu)
7066 struct attribute attr;
7067 int has_low_pc_attr = 0;
7068 int has_high_pc_attr = 0;
7070 memset (part_die, 0, sizeof (struct partial_die_info));
7072 part_die->offset = info_ptr - buffer;
7074 info_ptr += abbrev_len;
7079 part_die->tag = abbrev->tag;
7080 part_die->has_children = abbrev->has_children;
7082 for (i = 0; i < abbrev->num_attrs; ++i)
7084 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
7086 /* Store the data if it is of an attribute we want to keep in a
7087 partial symbol table. */
7091 switch (part_die->tag)
7093 case DW_TAG_compile_unit:
7094 case DW_TAG_type_unit:
7095 /* Compilation units have a DW_AT_name that is a filename, not
7096 a source language identifier. */
7097 case DW_TAG_enumeration_type:
7098 case DW_TAG_enumerator:
7099 /* These tags always have simple identifiers already; no need
7100 to canonicalize them. */
7101 part_die->name = DW_STRING (&attr);
7105 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
7106 &cu->objfile->objfile_obstack);
7110 case DW_AT_linkage_name:
7111 case DW_AT_MIPS_linkage_name:
7112 /* Note that both forms of linkage name might appear. We
7113 assume they will be the same, and we only store the last
7115 if (cu->language == language_ada)
7116 part_die->name = DW_STRING (&attr);
7119 has_low_pc_attr = 1;
7120 part_die->lowpc = DW_ADDR (&attr);
7123 has_high_pc_attr = 1;
7124 part_die->highpc = DW_ADDR (&attr);
7126 case DW_AT_location:
7127 /* Support the .debug_loc offsets */
7128 if (attr_form_is_block (&attr))
7130 part_die->locdesc = DW_BLOCK (&attr);
7132 else if (attr_form_is_section_offset (&attr))
7134 dwarf2_complex_location_expr_complaint ();
7138 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7139 "partial symbol information");
7142 case DW_AT_external:
7143 part_die->is_external = DW_UNSND (&attr);
7145 case DW_AT_declaration:
7146 part_die->is_declaration = DW_UNSND (&attr);
7149 part_die->has_type = 1;
7151 case DW_AT_abstract_origin:
7152 case DW_AT_specification:
7153 case DW_AT_extension:
7154 part_die->has_specification = 1;
7155 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
7158 /* Ignore absolute siblings, they might point outside of
7159 the current compile unit. */
7160 if (attr.form == DW_FORM_ref_addr)
7161 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
7163 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
7165 case DW_AT_byte_size:
7166 part_die->has_byte_size = 1;
7168 case DW_AT_calling_convention:
7169 /* DWARF doesn't provide a way to identify a program's source-level
7170 entry point. DW_AT_calling_convention attributes are only meant
7171 to describe functions' calling conventions.
7173 However, because it's a necessary piece of information in
7174 Fortran, and because DW_CC_program is the only piece of debugging
7175 information whose definition refers to a 'main program' at all,
7176 several compilers have begun marking Fortran main programs with
7177 DW_CC_program --- even when those functions use the standard
7178 calling conventions.
7180 So until DWARF specifies a way to provide this information and
7181 compilers pick up the new representation, we'll support this
7183 if (DW_UNSND (&attr) == DW_CC_program
7184 && cu->language == language_fortran)
7185 set_main_name (part_die->name);
7192 /* When using the GNU linker, .gnu.linkonce. sections are used to
7193 eliminate duplicate copies of functions and vtables and such.
7194 The linker will arbitrarily choose one and discard the others.
7195 The AT_*_pc values for such functions refer to local labels in
7196 these sections. If the section from that file was discarded, the
7197 labels are not in the output, so the relocs get a value of 0.
7198 If this is a discarded function, mark the pc bounds as invalid,
7199 so that GDB will ignore it. */
7200 if (has_low_pc_attr && has_high_pc_attr
7201 && part_die->lowpc < part_die->highpc
7202 && (part_die->lowpc != 0
7203 || dwarf2_per_objfile->has_section_at_zero))
7204 part_die->has_pc_info = 1;
7209 /* Find a cached partial DIE at OFFSET in CU. */
7211 static struct partial_die_info *
7212 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
7214 struct partial_die_info *lookup_die = NULL;
7215 struct partial_die_info part_die;
7217 part_die.offset = offset;
7218 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
7223 /* Find a partial DIE at OFFSET, which may or may not be in CU,
7224 except in the case of .debug_types DIEs which do not reference
7225 outside their CU (they do however referencing other types via
7228 static struct partial_die_info *
7229 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
7231 struct dwarf2_per_cu_data *per_cu = NULL;
7232 struct partial_die_info *pd = NULL;
7234 if (cu->per_cu->from_debug_types)
7236 pd = find_partial_die_in_comp_unit (offset, cu);
7242 if (offset_in_cu_p (&cu->header, offset))
7244 pd = find_partial_die_in_comp_unit (offset, cu);
7249 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
7251 if (per_cu->cu == NULL)
7253 load_partial_comp_unit (per_cu, cu->objfile);
7254 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
7255 dwarf2_per_objfile->read_in_chain = per_cu;
7258 per_cu->cu->last_used = 0;
7259 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
7261 if (pd == NULL && per_cu->load_all_dies == 0)
7263 struct cleanup *back_to;
7264 struct partial_die_info comp_unit_die;
7265 struct abbrev_info *abbrev;
7266 unsigned int bytes_read;
7269 per_cu->load_all_dies = 1;
7271 /* Re-read the DIEs. */
7272 back_to = make_cleanup (null_cleanup, 0);
7273 if (per_cu->cu->dwarf2_abbrevs == NULL)
7275 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
7276 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
7278 info_ptr = (dwarf2_per_objfile->info.buffer
7279 + per_cu->cu->header.offset
7280 + per_cu->cu->header.first_die_offset);
7281 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
7282 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
7283 per_cu->cu->objfile->obfd,
7284 dwarf2_per_objfile->info.buffer, info_ptr,
7286 if (comp_unit_die.has_children)
7287 load_partial_dies (per_cu->cu->objfile->obfd,
7288 dwarf2_per_objfile->info.buffer, info_ptr,
7290 do_cleanups (back_to);
7292 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
7298 internal_error (__FILE__, __LINE__,
7299 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7300 offset, bfd_get_filename (cu->objfile->obfd));
7304 /* Adjust PART_DIE before generating a symbol for it. This function
7305 may set the is_external flag or change the DIE's name. */
7308 fixup_partial_die (struct partial_die_info *part_die,
7309 struct dwarf2_cu *cu)
7311 /* If we found a reference attribute and the DIE has no name, try
7312 to find a name in the referred to DIE. */
7314 if (part_die->name == NULL && part_die->has_specification)
7316 struct partial_die_info *spec_die;
7318 spec_die = find_partial_die (part_die->spec_offset, cu);
7320 fixup_partial_die (spec_die, cu);
7324 part_die->name = spec_die->name;
7326 /* Copy DW_AT_external attribute if it is set. */
7327 if (spec_die->is_external)
7328 part_die->is_external = spec_die->is_external;
7332 /* Set default names for some unnamed DIEs. */
7333 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
7334 || part_die->tag == DW_TAG_class_type))
7335 part_die->name = "(anonymous class)";
7337 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
7338 part_die->name = "(anonymous namespace)";
7340 if (part_die->tag == DW_TAG_structure_type
7341 || part_die->tag == DW_TAG_class_type
7342 || part_die->tag == DW_TAG_union_type)
7343 guess_structure_name (part_die, cu);
7346 /* Read an attribute value described by an attribute form. */
7349 read_attribute_value (struct attribute *attr, unsigned form,
7350 bfd *abfd, gdb_byte *info_ptr,
7351 struct dwarf2_cu *cu)
7353 struct comp_unit_head *cu_header = &cu->header;
7354 unsigned int bytes_read;
7355 struct dwarf_block *blk;
7360 case DW_FORM_ref_addr:
7361 if (cu->header.version == 2)
7362 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
7364 DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
7365 info_ptr += bytes_read;
7368 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
7369 info_ptr += bytes_read;
7371 case DW_FORM_block2:
7372 blk = dwarf_alloc_block (cu);
7373 blk->size = read_2_bytes (abfd, info_ptr);
7375 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7376 info_ptr += blk->size;
7377 DW_BLOCK (attr) = blk;
7379 case DW_FORM_block4:
7380 blk = dwarf_alloc_block (cu);
7381 blk->size = read_4_bytes (abfd, info_ptr);
7383 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7384 info_ptr += blk->size;
7385 DW_BLOCK (attr) = blk;
7388 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
7392 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
7396 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
7399 case DW_FORM_sec_offset:
7400 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
7401 info_ptr += bytes_read;
7403 case DW_FORM_string:
7404 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
7405 DW_STRING_IS_CANONICAL (attr) = 0;
7406 info_ptr += bytes_read;
7409 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
7411 DW_STRING_IS_CANONICAL (attr) = 0;
7412 info_ptr += bytes_read;
7414 case DW_FORM_exprloc:
7416 blk = dwarf_alloc_block (cu);
7417 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7418 info_ptr += bytes_read;
7419 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7420 info_ptr += blk->size;
7421 DW_BLOCK (attr) = blk;
7423 case DW_FORM_block1:
7424 blk = dwarf_alloc_block (cu);
7425 blk->size = read_1_byte (abfd, info_ptr);
7427 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7428 info_ptr += blk->size;
7429 DW_BLOCK (attr) = blk;
7432 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7436 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7439 case DW_FORM_flag_present:
7440 DW_UNSND (attr) = 1;
7443 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
7444 info_ptr += bytes_read;
7447 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7448 info_ptr += bytes_read;
7451 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
7455 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
7459 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
7463 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
7467 /* Convert the signature to something we can record in DW_UNSND
7469 NOTE: This is NULL if the type wasn't found. */
7470 DW_SIGNATURED_TYPE (attr) =
7471 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
7474 case DW_FORM_ref_udata:
7475 DW_ADDR (attr) = (cu->header.offset
7476 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
7477 info_ptr += bytes_read;
7479 case DW_FORM_indirect:
7480 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7481 info_ptr += bytes_read;
7482 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
7485 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7486 dwarf_form_name (form),
7487 bfd_get_filename (abfd));
7490 /* We have seen instances where the compiler tried to emit a byte
7491 size attribute of -1 which ended up being encoded as an unsigned
7492 0xffffffff. Although 0xffffffff is technically a valid size value,
7493 an object of this size seems pretty unlikely so we can relatively
7494 safely treat these cases as if the size attribute was invalid and
7495 treat them as zero by default. */
7496 if (attr->name == DW_AT_byte_size
7497 && form == DW_FORM_data4
7498 && DW_UNSND (attr) >= 0xffffffff)
7501 (&symfile_complaints,
7502 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7503 hex_string (DW_UNSND (attr)));
7504 DW_UNSND (attr) = 0;
7510 /* Read an attribute described by an abbreviated attribute. */
7513 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
7514 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
7516 attr->name = abbrev->name;
7517 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
7520 /* read dwarf information from a buffer */
7523 read_1_byte (bfd *abfd, gdb_byte *buf)
7525 return bfd_get_8 (abfd, buf);
7529 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
7531 return bfd_get_signed_8 (abfd, buf);
7535 read_2_bytes (bfd *abfd, gdb_byte *buf)
7537 return bfd_get_16 (abfd, buf);
7541 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
7543 return bfd_get_signed_16 (abfd, buf);
7547 read_4_bytes (bfd *abfd, gdb_byte *buf)
7549 return bfd_get_32 (abfd, buf);
7553 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
7555 return bfd_get_signed_32 (abfd, buf);
7559 read_8_bytes (bfd *abfd, gdb_byte *buf)
7561 return bfd_get_64 (abfd, buf);
7565 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
7566 unsigned int *bytes_read)
7568 struct comp_unit_head *cu_header = &cu->header;
7569 CORE_ADDR retval = 0;
7571 if (cu_header->signed_addr_p)
7573 switch (cu_header->addr_size)
7576 retval = bfd_get_signed_16 (abfd, buf);
7579 retval = bfd_get_signed_32 (abfd, buf);
7582 retval = bfd_get_signed_64 (abfd, buf);
7585 internal_error (__FILE__, __LINE__,
7586 _("read_address: bad switch, signed [in module %s]"),
7587 bfd_get_filename (abfd));
7592 switch (cu_header->addr_size)
7595 retval = bfd_get_16 (abfd, buf);
7598 retval = bfd_get_32 (abfd, buf);
7601 retval = bfd_get_64 (abfd, buf);
7604 internal_error (__FILE__, __LINE__,
7605 _("read_address: bad switch, unsigned [in module %s]"),
7606 bfd_get_filename (abfd));
7610 *bytes_read = cu_header->addr_size;
7614 /* Read the initial length from a section. The (draft) DWARF 3
7615 specification allows the initial length to take up either 4 bytes
7616 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7617 bytes describe the length and all offsets will be 8 bytes in length
7620 An older, non-standard 64-bit format is also handled by this
7621 function. The older format in question stores the initial length
7622 as an 8-byte quantity without an escape value. Lengths greater
7623 than 2^32 aren't very common which means that the initial 4 bytes
7624 is almost always zero. Since a length value of zero doesn't make
7625 sense for the 32-bit format, this initial zero can be considered to
7626 be an escape value which indicates the presence of the older 64-bit
7627 format. As written, the code can't detect (old format) lengths
7628 greater than 4GB. If it becomes necessary to handle lengths
7629 somewhat larger than 4GB, we could allow other small values (such
7630 as the non-sensical values of 1, 2, and 3) to also be used as
7631 escape values indicating the presence of the old format.
7633 The value returned via bytes_read should be used to increment the
7634 relevant pointer after calling read_initial_length().
7636 [ Note: read_initial_length() and read_offset() are based on the
7637 document entitled "DWARF Debugging Information Format", revision
7638 3, draft 8, dated November 19, 2001. This document was obtained
7641 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7643 This document is only a draft and is subject to change. (So beware.)
7645 Details regarding the older, non-standard 64-bit format were
7646 determined empirically by examining 64-bit ELF files produced by
7647 the SGI toolchain on an IRIX 6.5 machine.
7649 - Kevin, July 16, 2002
7653 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
7655 LONGEST length = bfd_get_32 (abfd, buf);
7657 if (length == 0xffffffff)
7659 length = bfd_get_64 (abfd, buf + 4);
7662 else if (length == 0)
7664 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7665 length = bfd_get_64 (abfd, buf);
7676 /* Cover function for read_initial_length.
7677 Returns the length of the object at BUF, and stores the size of the
7678 initial length in *BYTES_READ and stores the size that offsets will be in
7680 If the initial length size is not equivalent to that specified in
7681 CU_HEADER then issue a complaint.
7682 This is useful when reading non-comp-unit headers. */
7685 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
7686 const struct comp_unit_head *cu_header,
7687 unsigned int *bytes_read,
7688 unsigned int *offset_size)
7690 LONGEST length = read_initial_length (abfd, buf, bytes_read);
7692 gdb_assert (cu_header->initial_length_size == 4
7693 || cu_header->initial_length_size == 8
7694 || cu_header->initial_length_size == 12);
7696 if (cu_header->initial_length_size != *bytes_read)
7697 complaint (&symfile_complaints,
7698 _("intermixed 32-bit and 64-bit DWARF sections"));
7700 *offset_size = (*bytes_read == 4) ? 4 : 8;
7704 /* Read an offset from the data stream. The size of the offset is
7705 given by cu_header->offset_size. */
7708 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
7709 unsigned int *bytes_read)
7711 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
7713 *bytes_read = cu_header->offset_size;
7717 /* Read an offset from the data stream. */
7720 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
7724 switch (offset_size)
7727 retval = bfd_get_32 (abfd, buf);
7730 retval = bfd_get_64 (abfd, buf);
7733 internal_error (__FILE__, __LINE__,
7734 _("read_offset_1: bad switch [in module %s]"),
7735 bfd_get_filename (abfd));
7742 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
7744 /* If the size of a host char is 8 bits, we can return a pointer
7745 to the buffer, otherwise we have to copy the data to a buffer
7746 allocated on the temporary obstack. */
7747 gdb_assert (HOST_CHAR_BIT == 8);
7752 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7754 /* If the size of a host char is 8 bits, we can return a pointer
7755 to the string, otherwise we have to copy the string to a buffer
7756 allocated on the temporary obstack. */
7757 gdb_assert (HOST_CHAR_BIT == 8);
7760 *bytes_read_ptr = 1;
7763 *bytes_read_ptr = strlen ((char *) buf) + 1;
7764 return (char *) buf;
7768 read_indirect_string (bfd *abfd, gdb_byte *buf,
7769 const struct comp_unit_head *cu_header,
7770 unsigned int *bytes_read_ptr)
7772 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
7774 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
7775 if (dwarf2_per_objfile->str.buffer == NULL)
7777 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7778 bfd_get_filename (abfd));
7781 if (str_offset >= dwarf2_per_objfile->str.size)
7783 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7784 bfd_get_filename (abfd));
7787 gdb_assert (HOST_CHAR_BIT == 8);
7788 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
7790 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
7793 static unsigned long
7794 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7796 unsigned long result;
7797 unsigned int num_read;
7807 byte = bfd_get_8 (abfd, buf);
7810 result |= ((unsigned long)(byte & 127) << shift);
7811 if ((byte & 128) == 0)
7817 *bytes_read_ptr = num_read;
7822 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7825 int i, shift, num_read;
7834 byte = bfd_get_8 (abfd, buf);
7837 result |= ((long)(byte & 127) << shift);
7839 if ((byte & 128) == 0)
7844 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
7845 result |= -(((long)1) << shift);
7846 *bytes_read_ptr = num_read;
7850 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7853 skip_leb128 (bfd *abfd, gdb_byte *buf)
7859 byte = bfd_get_8 (abfd, buf);
7861 if ((byte & 128) == 0)
7867 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
7874 cu->language = language_c;
7876 case DW_LANG_C_plus_plus:
7877 cu->language = language_cplus;
7880 cu->language = language_d;
7882 case DW_LANG_Fortran77:
7883 case DW_LANG_Fortran90:
7884 case DW_LANG_Fortran95:
7885 cu->language = language_fortran;
7887 case DW_LANG_Mips_Assembler:
7888 cu->language = language_asm;
7891 cu->language = language_java;
7895 cu->language = language_ada;
7897 case DW_LANG_Modula2:
7898 cu->language = language_m2;
7900 case DW_LANG_Pascal83:
7901 cu->language = language_pascal;
7904 cu->language = language_objc;
7906 case DW_LANG_Cobol74:
7907 case DW_LANG_Cobol85:
7909 cu->language = language_minimal;
7912 cu->language_defn = language_def (cu->language);
7915 /* Return the named attribute or NULL if not there. */
7917 static struct attribute *
7918 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
7921 struct attribute *spec = NULL;
7923 for (i = 0; i < die->num_attrs; ++i)
7925 if (die->attrs[i].name == name)
7926 return &die->attrs[i];
7927 if (die->attrs[i].name == DW_AT_specification
7928 || die->attrs[i].name == DW_AT_abstract_origin)
7929 spec = &die->attrs[i];
7934 die = follow_die_ref (die, spec, &cu);
7935 return dwarf2_attr (die, name, cu);
7941 /* Return the named attribute or NULL if not there,
7942 but do not follow DW_AT_specification, etc.
7943 This is for use in contexts where we're reading .debug_types dies.
7944 Following DW_AT_specification, DW_AT_abstract_origin will take us
7945 back up the chain, and we want to go down. */
7947 static struct attribute *
7948 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
7949 struct dwarf2_cu *cu)
7953 for (i = 0; i < die->num_attrs; ++i)
7954 if (die->attrs[i].name == name)
7955 return &die->attrs[i];
7960 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7961 and holds a non-zero value. This function should only be used for
7962 DW_FORM_flag or DW_FORM_flag_present attributes. */
7965 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
7967 struct attribute *attr = dwarf2_attr (die, name, cu);
7969 return (attr && DW_UNSND (attr));
7973 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
7975 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7976 which value is non-zero. However, we have to be careful with
7977 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7978 (via dwarf2_flag_true_p) follows this attribute. So we may
7979 end up accidently finding a declaration attribute that belongs
7980 to a different DIE referenced by the specification attribute,
7981 even though the given DIE does not have a declaration attribute. */
7982 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
7983 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
7986 /* Return the die giving the specification for DIE, if there is
7987 one. *SPEC_CU is the CU containing DIE on input, and the CU
7988 containing the return value on output. If there is no
7989 specification, but there is an abstract origin, that is
7992 static struct die_info *
7993 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
7995 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
7998 if (spec_attr == NULL)
7999 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
8001 if (spec_attr == NULL)
8004 return follow_die_ref (die, spec_attr, spec_cu);
8007 /* Free the line_header structure *LH, and any arrays and strings it
8010 free_line_header (struct line_header *lh)
8012 if (lh->standard_opcode_lengths)
8013 xfree (lh->standard_opcode_lengths);
8015 /* Remember that all the lh->file_names[i].name pointers are
8016 pointers into debug_line_buffer, and don't need to be freed. */
8018 xfree (lh->file_names);
8020 /* Similarly for the include directory names. */
8021 if (lh->include_dirs)
8022 xfree (lh->include_dirs);
8028 /* Add an entry to LH's include directory table. */
8030 add_include_dir (struct line_header *lh, char *include_dir)
8032 /* Grow the array if necessary. */
8033 if (lh->include_dirs_size == 0)
8035 lh->include_dirs_size = 1; /* for testing */
8036 lh->include_dirs = xmalloc (lh->include_dirs_size
8037 * sizeof (*lh->include_dirs));
8039 else if (lh->num_include_dirs >= lh->include_dirs_size)
8041 lh->include_dirs_size *= 2;
8042 lh->include_dirs = xrealloc (lh->include_dirs,
8043 (lh->include_dirs_size
8044 * sizeof (*lh->include_dirs)));
8047 lh->include_dirs[lh->num_include_dirs++] = include_dir;
8051 /* Add an entry to LH's file name table. */
8053 add_file_name (struct line_header *lh,
8055 unsigned int dir_index,
8056 unsigned int mod_time,
8057 unsigned int length)
8059 struct file_entry *fe;
8061 /* Grow the array if necessary. */
8062 if (lh->file_names_size == 0)
8064 lh->file_names_size = 1; /* for testing */
8065 lh->file_names = xmalloc (lh->file_names_size
8066 * sizeof (*lh->file_names));
8068 else if (lh->num_file_names >= lh->file_names_size)
8070 lh->file_names_size *= 2;
8071 lh->file_names = xrealloc (lh->file_names,
8072 (lh->file_names_size
8073 * sizeof (*lh->file_names)));
8076 fe = &lh->file_names[lh->num_file_names++];
8078 fe->dir_index = dir_index;
8079 fe->mod_time = mod_time;
8080 fe->length = length;
8086 /* Read the statement program header starting at OFFSET in
8087 .debug_line, according to the endianness of ABFD. Return a pointer
8088 to a struct line_header, allocated using xmalloc.
8090 NOTE: the strings in the include directory and file name tables of
8091 the returned object point into debug_line_buffer, and must not be
8093 static struct line_header *
8094 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
8095 struct dwarf2_cu *cu)
8097 struct cleanup *back_to;
8098 struct line_header *lh;
8100 unsigned int bytes_read, offset_size;
8102 char *cur_dir, *cur_file;
8104 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
8105 if (dwarf2_per_objfile->line.buffer == NULL)
8107 complaint (&symfile_complaints, _("missing .debug_line section"));
8111 /* Make sure that at least there's room for the total_length field.
8112 That could be 12 bytes long, but we're just going to fudge that. */
8113 if (offset + 4 >= dwarf2_per_objfile->line.size)
8115 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8119 lh = xmalloc (sizeof (*lh));
8120 memset (lh, 0, sizeof (*lh));
8121 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
8124 line_ptr = dwarf2_per_objfile->line.buffer + offset;
8126 /* Read in the header. */
8128 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
8129 &bytes_read, &offset_size);
8130 line_ptr += bytes_read;
8131 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
8132 + dwarf2_per_objfile->line.size))
8134 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8137 lh->statement_program_end = line_ptr + lh->total_length;
8138 lh->version = read_2_bytes (abfd, line_ptr);
8140 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
8141 line_ptr += offset_size;
8142 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
8144 if (lh->version >= 4)
8146 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
8150 lh->maximum_ops_per_instruction = 1;
8152 if (lh->maximum_ops_per_instruction == 0)
8154 lh->maximum_ops_per_instruction = 1;
8155 complaint (&symfile_complaints,
8156 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
8159 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
8161 lh->line_base = read_1_signed_byte (abfd, line_ptr);
8163 lh->line_range = read_1_byte (abfd, line_ptr);
8165 lh->opcode_base = read_1_byte (abfd, line_ptr);
8167 lh->standard_opcode_lengths
8168 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
8170 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
8171 for (i = 1; i < lh->opcode_base; ++i)
8173 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
8177 /* Read directory table. */
8178 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
8180 line_ptr += bytes_read;
8181 add_include_dir (lh, cur_dir);
8183 line_ptr += bytes_read;
8185 /* Read file name table. */
8186 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
8188 unsigned int dir_index, mod_time, length;
8190 line_ptr += bytes_read;
8191 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8192 line_ptr += bytes_read;
8193 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8194 line_ptr += bytes_read;
8195 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8196 line_ptr += bytes_read;
8198 add_file_name (lh, cur_file, dir_index, mod_time, length);
8200 line_ptr += bytes_read;
8201 lh->statement_program_start = line_ptr;
8203 if (line_ptr > (dwarf2_per_objfile->line.buffer
8204 + dwarf2_per_objfile->line.size))
8205 complaint (&symfile_complaints,
8206 _("line number info header doesn't fit in `.debug_line' section"));
8208 discard_cleanups (back_to);
8212 /* This function exists to work around a bug in certain compilers
8213 (particularly GCC 2.95), in which the first line number marker of a
8214 function does not show up until after the prologue, right before
8215 the second line number marker. This function shifts ADDRESS down
8216 to the beginning of the function if necessary, and is called on
8217 addresses passed to record_line. */
8220 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
8222 struct function_range *fn;
8224 /* Find the function_range containing address. */
8229 cu->cached_fn = cu->first_fn;
8233 if (fn->lowpc <= address && fn->highpc > address)
8239 while (fn && fn != cu->cached_fn)
8240 if (fn->lowpc <= address && fn->highpc > address)
8250 if (address != fn->lowpc)
8251 complaint (&symfile_complaints,
8252 _("misplaced first line number at 0x%lx for '%s'"),
8253 (unsigned long) address, fn->name);
8258 /* Decode the Line Number Program (LNP) for the given line_header
8259 structure and CU. The actual information extracted and the type
8260 of structures created from the LNP depends on the value of PST.
8262 1. If PST is NULL, then this procedure uses the data from the program
8263 to create all necessary symbol tables, and their linetables.
8264 The compilation directory of the file is passed in COMP_DIR,
8265 and must not be NULL.
8267 2. If PST is not NULL, this procedure reads the program to determine
8268 the list of files included by the unit represented by PST, and
8269 builds all the associated partial symbol tables. In this case,
8270 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
8271 is not used to compute the full name of the symtab, and therefore
8272 omitting it when building the partial symtab does not introduce
8273 the potential for inconsistency - a partial symtab and its associated
8274 symbtab having a different fullname -). */
8277 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
8278 struct dwarf2_cu *cu, struct partial_symtab *pst)
8280 gdb_byte *line_ptr, *extended_end;
8282 unsigned int bytes_read, extended_len;
8283 unsigned char op_code, extended_op, adj_opcode;
8285 struct objfile *objfile = cu->objfile;
8286 struct gdbarch *gdbarch = get_objfile_arch (objfile);
8287 const int decode_for_pst_p = (pst != NULL);
8288 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
8290 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8292 line_ptr = lh->statement_program_start;
8293 line_end = lh->statement_program_end;
8295 /* Read the statement sequences until there's nothing left. */
8296 while (line_ptr < line_end)
8298 /* state machine registers */
8299 CORE_ADDR address = 0;
8300 unsigned int file = 1;
8301 unsigned int line = 1;
8302 unsigned int column = 0;
8303 int is_stmt = lh->default_is_stmt;
8304 int basic_block = 0;
8305 int end_sequence = 0;
8307 unsigned char op_index = 0;
8309 if (!decode_for_pst_p && lh->num_file_names >= file)
8311 /* Start a subfile for the current file of the state machine. */
8312 /* lh->include_dirs and lh->file_names are 0-based, but the
8313 directory and file name numbers in the statement program
8315 struct file_entry *fe = &lh->file_names[file - 1];
8319 dir = lh->include_dirs[fe->dir_index - 1];
8321 dwarf2_start_subfile (fe->name, dir, comp_dir);
8324 /* Decode the table. */
8325 while (!end_sequence)
8327 op_code = read_1_byte (abfd, line_ptr);
8329 if (line_ptr > line_end)
8331 dwarf2_debug_line_missing_end_sequence_complaint ();
8335 if (op_code >= lh->opcode_base)
8337 /* Special operand. */
8338 adj_opcode = op_code - lh->opcode_base;
8339 address += (((op_index + (adj_opcode / lh->line_range))
8340 / lh->maximum_ops_per_instruction)
8341 * lh->minimum_instruction_length);
8342 op_index = ((op_index + (adj_opcode / lh->line_range))
8343 % lh->maximum_ops_per_instruction);
8344 line += lh->line_base + (adj_opcode % lh->line_range);
8345 if (lh->num_file_names < file || file == 0)
8346 dwarf2_debug_line_missing_file_complaint ();
8347 /* For now we ignore lines not starting on an
8348 instruction boundary. */
8349 else if (op_index == 0)
8351 lh->file_names[file - 1].included_p = 1;
8352 if (!decode_for_pst_p && is_stmt)
8354 if (last_subfile != current_subfile)
8356 addr = gdbarch_addr_bits_remove (gdbarch, address);
8358 record_line (last_subfile, 0, addr);
8359 last_subfile = current_subfile;
8361 /* Append row to matrix using current values. */
8362 addr = check_cu_functions (address, cu);
8363 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8364 record_line (current_subfile, line, addr);
8369 else switch (op_code)
8371 case DW_LNS_extended_op:
8372 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8373 line_ptr += bytes_read;
8374 extended_end = line_ptr + extended_len;
8375 extended_op = read_1_byte (abfd, line_ptr);
8377 switch (extended_op)
8379 case DW_LNE_end_sequence:
8382 case DW_LNE_set_address:
8383 address = read_address (abfd, line_ptr, cu, &bytes_read);
8385 line_ptr += bytes_read;
8386 address += baseaddr;
8388 case DW_LNE_define_file:
8391 unsigned int dir_index, mod_time, length;
8393 cur_file = read_string (abfd, line_ptr, &bytes_read);
8394 line_ptr += bytes_read;
8396 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8397 line_ptr += bytes_read;
8399 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8400 line_ptr += bytes_read;
8402 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8403 line_ptr += bytes_read;
8404 add_file_name (lh, cur_file, dir_index, mod_time, length);
8407 case DW_LNE_set_discriminator:
8408 /* The discriminator is not interesting to the debugger;
8410 line_ptr = extended_end;
8413 complaint (&symfile_complaints,
8414 _("mangled .debug_line section"));
8417 /* Make sure that we parsed the extended op correctly. If e.g.
8418 we expected a different address size than the producer used,
8419 we may have read the wrong number of bytes. */
8420 if (line_ptr != extended_end)
8422 complaint (&symfile_complaints,
8423 _("mangled .debug_line section"));
8428 if (lh->num_file_names < file || file == 0)
8429 dwarf2_debug_line_missing_file_complaint ();
8432 lh->file_names[file - 1].included_p = 1;
8433 if (!decode_for_pst_p && is_stmt)
8435 if (last_subfile != current_subfile)
8437 addr = gdbarch_addr_bits_remove (gdbarch, address);
8439 record_line (last_subfile, 0, addr);
8440 last_subfile = current_subfile;
8442 addr = check_cu_functions (address, cu);
8443 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8444 record_line (current_subfile, line, addr);
8449 case DW_LNS_advance_pc:
8452 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8454 address += (((op_index + adjust)
8455 / lh->maximum_ops_per_instruction)
8456 * lh->minimum_instruction_length);
8457 op_index = ((op_index + adjust)
8458 % lh->maximum_ops_per_instruction);
8459 line_ptr += bytes_read;
8462 case DW_LNS_advance_line:
8463 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
8464 line_ptr += bytes_read;
8466 case DW_LNS_set_file:
8468 /* The arrays lh->include_dirs and lh->file_names are
8469 0-based, but the directory and file name numbers in
8470 the statement program are 1-based. */
8471 struct file_entry *fe;
8474 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8475 line_ptr += bytes_read;
8476 if (lh->num_file_names < file || file == 0)
8477 dwarf2_debug_line_missing_file_complaint ();
8480 fe = &lh->file_names[file - 1];
8482 dir = lh->include_dirs[fe->dir_index - 1];
8483 if (!decode_for_pst_p)
8485 last_subfile = current_subfile;
8486 dwarf2_start_subfile (fe->name, dir, comp_dir);
8491 case DW_LNS_set_column:
8492 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8493 line_ptr += bytes_read;
8495 case DW_LNS_negate_stmt:
8496 is_stmt = (!is_stmt);
8498 case DW_LNS_set_basic_block:
8501 /* Add to the address register of the state machine the
8502 address increment value corresponding to special opcode
8503 255. I.e., this value is scaled by the minimum
8504 instruction length since special opcode 255 would have
8505 scaled the the increment. */
8506 case DW_LNS_const_add_pc:
8508 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
8510 address += (((op_index + adjust)
8511 / lh->maximum_ops_per_instruction)
8512 * lh->minimum_instruction_length);
8513 op_index = ((op_index + adjust)
8514 % lh->maximum_ops_per_instruction);
8517 case DW_LNS_fixed_advance_pc:
8518 address += read_2_bytes (abfd, line_ptr);
8524 /* Unknown standard opcode, ignore it. */
8527 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
8529 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8530 line_ptr += bytes_read;
8535 if (lh->num_file_names < file || file == 0)
8536 dwarf2_debug_line_missing_file_complaint ();
8539 lh->file_names[file - 1].included_p = 1;
8540 if (!decode_for_pst_p)
8542 addr = gdbarch_addr_bits_remove (gdbarch, address);
8543 record_line (current_subfile, 0, addr);
8548 if (decode_for_pst_p)
8552 /* Now that we're done scanning the Line Header Program, we can
8553 create the psymtab of each included file. */
8554 for (file_index = 0; file_index < lh->num_file_names; file_index++)
8555 if (lh->file_names[file_index].included_p == 1)
8557 const struct file_entry fe = lh->file_names [file_index];
8558 char *include_name = fe.name;
8559 char *dir_name = NULL;
8560 char *pst_filename = pst->filename;
8563 dir_name = lh->include_dirs[fe.dir_index - 1];
8565 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
8567 include_name = concat (dir_name, SLASH_STRING,
8568 include_name, (char *)NULL);
8569 make_cleanup (xfree, include_name);
8572 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
8574 pst_filename = concat (pst->dirname, SLASH_STRING,
8575 pst_filename, (char *)NULL);
8576 make_cleanup (xfree, pst_filename);
8579 if (strcmp (include_name, pst_filename) != 0)
8580 dwarf2_create_include_psymtab (include_name, pst, objfile);
8585 /* Make sure a symtab is created for every file, even files
8586 which contain only variables (i.e. no code with associated
8590 struct file_entry *fe;
8592 for (i = 0; i < lh->num_file_names; i++)
8596 fe = &lh->file_names[i];
8598 dir = lh->include_dirs[fe->dir_index - 1];
8599 dwarf2_start_subfile (fe->name, dir, comp_dir);
8601 /* Skip the main file; we don't need it, and it must be
8602 allocated last, so that it will show up before the
8603 non-primary symtabs in the objfile's symtab list. */
8604 if (current_subfile == first_subfile)
8607 if (current_subfile->symtab == NULL)
8608 current_subfile->symtab = allocate_symtab (current_subfile->name,
8610 fe->symtab = current_subfile->symtab;
8615 /* Start a subfile for DWARF. FILENAME is the name of the file and
8616 DIRNAME the name of the source directory which contains FILENAME
8617 or NULL if not known. COMP_DIR is the compilation directory for the
8618 linetable's compilation unit or NULL if not known.
8619 This routine tries to keep line numbers from identical absolute and
8620 relative file names in a common subfile.
8622 Using the `list' example from the GDB testsuite, which resides in
8623 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8624 of /srcdir/list0.c yields the following debugging information for list0.c:
8626 DW_AT_name: /srcdir/list0.c
8627 DW_AT_comp_dir: /compdir
8628 files.files[0].name: list0.h
8629 files.files[0].dir: /srcdir
8630 files.files[1].name: list0.c
8631 files.files[1].dir: /srcdir
8633 The line number information for list0.c has to end up in a single
8634 subfile, so that `break /srcdir/list0.c:1' works as expected.
8635 start_subfile will ensure that this happens provided that we pass the
8636 concatenation of files.files[1].dir and files.files[1].name as the
8640 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
8644 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8645 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8646 second argument to start_subfile. To be consistent, we do the
8647 same here. In order not to lose the line information directory,
8648 we concatenate it to the filename when it makes sense.
8649 Note that the Dwarf3 standard says (speaking of filenames in line
8650 information): ``The directory index is ignored for file names
8651 that represent full path names''. Thus ignoring dirname in the
8652 `else' branch below isn't an issue. */
8654 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
8655 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
8657 fullname = filename;
8659 start_subfile (fullname, comp_dir);
8661 if (fullname != filename)
8666 var_decode_location (struct attribute *attr, struct symbol *sym,
8667 struct dwarf2_cu *cu)
8669 struct objfile *objfile = cu->objfile;
8670 struct comp_unit_head *cu_header = &cu->header;
8672 /* NOTE drow/2003-01-30: There used to be a comment and some special
8673 code here to turn a symbol with DW_AT_external and a
8674 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8675 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8676 with some versions of binutils) where shared libraries could have
8677 relocations against symbols in their debug information - the
8678 minimal symbol would have the right address, but the debug info
8679 would not. It's no longer necessary, because we will explicitly
8680 apply relocations when we read in the debug information now. */
8682 /* A DW_AT_location attribute with no contents indicates that a
8683 variable has been optimized away. */
8684 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
8686 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8690 /* Handle one degenerate form of location expression specially, to
8691 preserve GDB's previous behavior when section offsets are
8692 specified. If this is just a DW_OP_addr then mark this symbol
8695 if (attr_form_is_block (attr)
8696 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
8697 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
8701 SYMBOL_VALUE_ADDRESS (sym) =
8702 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
8703 SYMBOL_CLASS (sym) = LOC_STATIC;
8704 fixup_symbol_section (sym, objfile);
8705 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
8706 SYMBOL_SECTION (sym));
8710 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8711 expression evaluator, and use LOC_COMPUTED only when necessary
8712 (i.e. when the value of a register or memory location is
8713 referenced, or a thread-local block, etc.). Then again, it might
8714 not be worthwhile. I'm assuming that it isn't unless performance
8715 or memory numbers show me otherwise. */
8717 dwarf2_symbol_mark_computed (attr, sym, cu);
8718 SYMBOL_CLASS (sym) = LOC_COMPUTED;
8721 /* Given a pointer to a DWARF information entry, figure out if we need
8722 to make a symbol table entry for it, and if so, create a new entry
8723 and return a pointer to it.
8724 If TYPE is NULL, determine symbol type from the die, otherwise
8725 used the passed type. */
8727 static struct symbol *
8728 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
8730 struct objfile *objfile = cu->objfile;
8731 struct symbol *sym = NULL;
8733 struct attribute *attr = NULL;
8734 struct attribute *attr2 = NULL;
8736 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
8738 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8740 name = dwarf2_name (die, cu);
8743 const char *linkagename;
8745 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
8746 sizeof (struct symbol));
8747 OBJSTAT (objfile, n_syms++);
8748 memset (sym, 0, sizeof (struct symbol));
8750 /* Cache this symbol's name and the name's demangled form (if any). */
8751 SYMBOL_LANGUAGE (sym) = cu->language;
8752 linkagename = dwarf2_physname (name, die, cu);
8753 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
8755 /* Fortran does not have mangling standard and the mangling does differ
8756 between gfortran, iFort etc. */
8757 if (cu->language == language_fortran
8758 && sym->ginfo.language_specific.cplus_specific.demangled_name == NULL)
8759 sym->ginfo.language_specific.cplus_specific.demangled_name
8760 = (char *) dwarf2_full_name (name, die, cu);
8762 /* Default assumptions.
8763 Use the passed type or decode it from the die. */
8764 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8765 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8767 SYMBOL_TYPE (sym) = type;
8769 SYMBOL_TYPE (sym) = die_type (die, cu);
8770 attr = dwarf2_attr (die,
8771 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
8775 SYMBOL_LINE (sym) = DW_UNSND (attr);
8778 attr = dwarf2_attr (die,
8779 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
8783 int file_index = DW_UNSND (attr);
8785 if (cu->line_header == NULL
8786 || file_index > cu->line_header->num_file_names)
8787 complaint (&symfile_complaints,
8788 _("file index out of range"));
8789 else if (file_index > 0)
8791 struct file_entry *fe;
8793 fe = &cu->line_header->file_names[file_index - 1];
8794 SYMBOL_SYMTAB (sym) = fe->symtab;
8801 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
8804 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
8806 SYMBOL_CLASS (sym) = LOC_LABEL;
8808 case DW_TAG_subprogram:
8809 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8811 SYMBOL_CLASS (sym) = LOC_BLOCK;
8812 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8813 if ((attr2 && (DW_UNSND (attr2) != 0))
8814 || cu->language == language_ada)
8816 /* Subprograms marked external are stored as a global symbol.
8817 Ada subprograms, whether marked external or not, are always
8818 stored as a global symbol, because we want to be able to
8819 access them globally. For instance, we want to be able
8820 to break on a nested subprogram without having to
8821 specify the context. */
8822 add_symbol_to_list (sym, &global_symbols);
8826 add_symbol_to_list (sym, cu->list_in_scope);
8829 case DW_TAG_inlined_subroutine:
8830 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8832 SYMBOL_CLASS (sym) = LOC_BLOCK;
8833 SYMBOL_INLINED (sym) = 1;
8834 /* Do not add the symbol to any lists. It will be found via
8835 BLOCK_FUNCTION from the blockvector. */
8837 case DW_TAG_variable:
8839 /* Compilation with minimal debug info may result in variables
8840 with missing type entries. Change the misleading `void' type
8841 to something sensible. */
8842 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
8844 = objfile_type (objfile)->nodebug_data_symbol;
8846 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8847 /* In the case of DW_TAG_member, we should only be called for
8848 static const members. */
8849 if (die->tag == DW_TAG_member)
8851 /* dwarf2_add_field uses die_is_declaration,
8852 so we do the same. */
8853 gdb_assert (die_is_declaration (die, cu));
8858 dwarf2_const_value (attr, sym, cu);
8859 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8860 if (attr2 && (DW_UNSND (attr2) != 0))
8861 add_symbol_to_list (sym, &global_symbols);
8863 add_symbol_to_list (sym, cu->list_in_scope);
8866 attr = dwarf2_attr (die, DW_AT_location, cu);
8869 var_decode_location (attr, sym, cu);
8870 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8871 if (attr2 && (DW_UNSND (attr2) != 0))
8873 struct pending **list_to_add;
8875 /* Workaround gfortran PR debug/40040 - it uses
8876 DW_AT_location for variables in -fPIC libraries which may
8877 get overriden by other libraries/executable and get
8878 a different address. Resolve it by the minimal symbol
8879 which may come from inferior's executable using copy
8880 relocation. Make this workaround only for gfortran as for
8881 other compilers GDB cannot guess the minimal symbol
8882 Fortran mangling kind. */
8883 if (cu->language == language_fortran && die->parent
8884 && die->parent->tag == DW_TAG_module
8886 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
8887 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8889 /* A variable with DW_AT_external is never static,
8890 but it may be block-scoped. */
8891 list_to_add = (cu->list_in_scope == &file_symbols
8892 ? &global_symbols : cu->list_in_scope);
8893 add_symbol_to_list (sym, list_to_add);
8896 add_symbol_to_list (sym, cu->list_in_scope);
8900 /* We do not know the address of this symbol.
8901 If it is an external symbol and we have type information
8902 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8903 The address of the variable will then be determined from
8904 the minimal symbol table whenever the variable is
8906 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8907 if (attr2 && (DW_UNSND (attr2) != 0)
8908 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
8910 struct pending **list_to_add;
8912 /* A variable with DW_AT_external is never static, but it
8913 may be block-scoped. */
8914 list_to_add = (cu->list_in_scope == &file_symbols
8915 ? &global_symbols : cu->list_in_scope);
8917 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8918 add_symbol_to_list (sym, list_to_add);
8920 else if (!die_is_declaration (die, cu))
8922 /* Use the default LOC_OPTIMIZED_OUT class. */
8923 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
8924 add_symbol_to_list (sym, cu->list_in_scope);
8928 case DW_TAG_formal_parameter:
8929 /* If we are inside a function, mark this as an argument. If
8930 not, we might be looking at an argument to an inlined function
8931 when we do not have enough information to show inlined frames;
8932 pretend it's a local variable in that case so that the user can
8934 if (context_stack_depth > 0
8935 && context_stack[context_stack_depth - 1].name != NULL)
8936 SYMBOL_IS_ARGUMENT (sym) = 1;
8937 attr = dwarf2_attr (die, DW_AT_location, cu);
8940 var_decode_location (attr, sym, cu);
8942 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8945 dwarf2_const_value (attr, sym, cu);
8947 attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
8948 if (attr && DW_UNSND (attr))
8950 struct type *ref_type;
8952 ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
8953 SYMBOL_TYPE (sym) = ref_type;
8956 add_symbol_to_list (sym, cu->list_in_scope);
8958 case DW_TAG_unspecified_parameters:
8959 /* From varargs functions; gdb doesn't seem to have any
8960 interest in this information, so just ignore it for now.
8963 case DW_TAG_class_type:
8964 case DW_TAG_interface_type:
8965 case DW_TAG_structure_type:
8966 case DW_TAG_union_type:
8967 case DW_TAG_set_type:
8968 case DW_TAG_enumeration_type:
8969 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8970 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
8973 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8974 really ever be static objects: otherwise, if you try
8975 to, say, break of a class's method and you're in a file
8976 which doesn't mention that class, it won't work unless
8977 the check for all static symbols in lookup_symbol_aux
8978 saves you. See the OtherFileClass tests in
8979 gdb.c++/namespace.exp. */
8981 struct pending **list_to_add;
8983 list_to_add = (cu->list_in_scope == &file_symbols
8984 && (cu->language == language_cplus
8985 || cu->language == language_java)
8986 ? &global_symbols : cu->list_in_scope);
8988 add_symbol_to_list (sym, list_to_add);
8990 /* The semantics of C++ state that "struct foo { ... }" also
8991 defines a typedef for "foo". A Java class declaration also
8992 defines a typedef for the class. */
8993 if (cu->language == language_cplus
8994 || cu->language == language_java
8995 || cu->language == language_ada)
8997 /* The symbol's name is already allocated along with
8998 this objfile, so we don't need to duplicate it for
9000 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
9001 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
9005 case DW_TAG_typedef:
9006 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
9007 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
9008 add_symbol_to_list (sym, cu->list_in_scope);
9010 case DW_TAG_base_type:
9011 case DW_TAG_subrange_type:
9012 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
9013 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
9014 add_symbol_to_list (sym, cu->list_in_scope);
9016 case DW_TAG_enumerator:
9017 attr = dwarf2_attr (die, DW_AT_const_value, cu);
9020 dwarf2_const_value (attr, sym, cu);
9023 /* NOTE: carlton/2003-11-10: See comment above in the
9024 DW_TAG_class_type, etc. block. */
9026 struct pending **list_to_add;
9028 list_to_add = (cu->list_in_scope == &file_symbols
9029 && (cu->language == language_cplus
9030 || cu->language == language_java)
9031 ? &global_symbols : cu->list_in_scope);
9033 add_symbol_to_list (sym, list_to_add);
9036 case DW_TAG_namespace:
9037 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
9038 add_symbol_to_list (sym, &global_symbols);
9041 /* Not a tag we recognize. Hopefully we aren't processing
9042 trash data, but since we must specifically ignore things
9043 we don't recognize, there is nothing else we should do at
9045 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
9046 dwarf_tag_name (die->tag));
9050 /* For the benefit of old versions of GCC, check for anonymous
9051 namespaces based on the demangled name. */
9052 if (!processing_has_namespace_info
9053 && cu->language == language_cplus)
9054 cp_scan_for_anonymous_namespaces (sym);
9059 /* Copy constant value from an attribute to a symbol. */
9062 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
9063 struct dwarf2_cu *cu)
9065 struct objfile *objfile = cu->objfile;
9066 struct comp_unit_head *cu_header = &cu->header;
9067 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
9068 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
9069 struct dwarf_block *blk;
9075 struct dwarf2_locexpr_baton *baton;
9078 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
9079 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
9080 cu_header->addr_size,
9081 TYPE_LENGTH (SYMBOL_TYPE
9083 /* Symbols of this form are reasonably rare, so we just
9084 piggyback on the existing location code rather than writing
9085 a new implementation of symbol_computed_ops. */
9086 baton = obstack_alloc (&objfile->objfile_obstack,
9087 sizeof (struct dwarf2_locexpr_baton));
9088 baton->per_cu = cu->per_cu;
9089 gdb_assert (baton->per_cu);
9091 baton->size = 2 + cu_header->addr_size;
9092 data = obstack_alloc (&objfile->objfile_obstack, baton->size);
9095 data[0] = DW_OP_addr;
9096 store_unsigned_integer (&data[1], cu_header->addr_size,
9097 byte_order, DW_ADDR (attr));
9098 data[cu_header->addr_size + 1] = DW_OP_stack_value;
9100 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
9101 SYMBOL_LOCATION_BATON (sym) = baton;
9102 SYMBOL_CLASS (sym) = LOC_COMPUTED;
9105 case DW_FORM_string:
9107 /* DW_STRING is already allocated on the obstack, point directly
9109 SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
9110 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
9112 case DW_FORM_block1:
9113 case DW_FORM_block2:
9114 case DW_FORM_block4:
9116 case DW_FORM_exprloc:
9117 blk = DW_BLOCK (attr);
9118 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
9119 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
9121 TYPE_LENGTH (SYMBOL_TYPE
9123 SYMBOL_VALUE_BYTES (sym) =
9124 obstack_alloc (&objfile->objfile_obstack, blk->size);
9125 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
9126 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
9129 /* The DW_AT_const_value attributes are supposed to carry the
9130 symbol's value "represented as it would be on the target
9131 architecture." By the time we get here, it's already been
9132 converted to host endianness, so we just need to sign- or
9133 zero-extend it as appropriate. */
9135 dwarf2_const_value_data (attr, sym, 8);
9138 dwarf2_const_value_data (attr, sym, 16);
9141 dwarf2_const_value_data (attr, sym, 32);
9144 dwarf2_const_value_data (attr, sym, 64);
9148 SYMBOL_VALUE (sym) = DW_SND (attr);
9149 SYMBOL_CLASS (sym) = LOC_CONST;
9153 SYMBOL_VALUE (sym) = DW_UNSND (attr);
9154 SYMBOL_CLASS (sym) = LOC_CONST;
9158 complaint (&symfile_complaints,
9159 _("unsupported const value attribute form: '%s'"),
9160 dwarf_form_name (attr->form));
9161 SYMBOL_VALUE (sym) = 0;
9162 SYMBOL_CLASS (sym) = LOC_CONST;
9168 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
9169 or zero-extend it as appropriate for the symbol's type. */
9171 dwarf2_const_value_data (struct attribute *attr,
9175 LONGEST l = DW_UNSND (attr);
9177 if (bits < sizeof (l) * 8)
9179 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
9180 l &= ((LONGEST) 1 << bits) - 1;
9182 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
9185 SYMBOL_VALUE (sym) = l;
9186 SYMBOL_CLASS (sym) = LOC_CONST;
9190 /* Return the type of the die in question using its DW_AT_type attribute. */
9192 static struct type *
9193 die_type (struct die_info *die, struct dwarf2_cu *cu)
9195 struct attribute *type_attr;
9196 struct die_info *type_die;
9198 type_attr = dwarf2_attr (die, DW_AT_type, cu);
9201 /* A missing DW_AT_type represents a void type. */
9202 return objfile_type (cu->objfile)->builtin_void;
9205 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
9207 return tag_type_to_type (type_die, cu);
9210 /* True iff CU's producer generates GNAT Ada auxiliary information
9211 that allows to find parallel types through that information instead
9212 of having to do expensive parallel lookups by type name. */
9215 need_gnat_info (struct dwarf2_cu *cu)
9217 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
9218 of GNAT produces this auxiliary information, without any indication
9219 that it is produced. Part of enhancing the FSF version of GNAT
9220 to produce that information will be to put in place an indicator
9221 that we can use in order to determine whether the descriptive type
9222 info is available or not. One suggestion that has been made is
9223 to use a new attribute, attached to the CU die. For now, assume
9224 that the descriptive type info is not available. */
9229 /* Return the auxiliary type of the die in question using its
9230 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
9231 attribute is not present. */
9233 static struct type *
9234 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
9236 struct attribute *type_attr;
9237 struct die_info *type_die;
9239 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
9243 type_die = follow_die_ref (die, type_attr, &cu);
9244 return tag_type_to_type (type_die, cu);
9247 /* If DIE has a descriptive_type attribute, then set the TYPE's
9248 descriptive type accordingly. */
9251 set_descriptive_type (struct type *type, struct die_info *die,
9252 struct dwarf2_cu *cu)
9254 struct type *descriptive_type = die_descriptive_type (die, cu);
9256 if (descriptive_type)
9258 ALLOCATE_GNAT_AUX_TYPE (type);
9259 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
9263 /* Return the containing type of the die in question using its
9264 DW_AT_containing_type attribute. */
9266 static struct type *
9267 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
9269 struct attribute *type_attr;
9270 struct die_info *type_die;
9272 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
9274 error (_("Dwarf Error: Problem turning containing type into gdb type "
9275 "[in module %s]"), cu->objfile->name);
9277 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
9278 return tag_type_to_type (type_die, cu);
9281 static struct type *
9282 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
9284 struct type *this_type;
9286 this_type = read_type_die (die, cu);
9289 char *message, *saved;
9291 /* read_type_die already issued a complaint. */
9292 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
9296 saved = obstack_copy0 (&cu->objfile->objfile_obstack,
9297 message, strlen (message));
9300 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
9305 static struct type *
9306 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
9308 struct type *this_type;
9310 this_type = get_die_type (die, cu);
9316 case DW_TAG_class_type:
9317 case DW_TAG_interface_type:
9318 case DW_TAG_structure_type:
9319 case DW_TAG_union_type:
9320 this_type = read_structure_type (die, cu);
9322 case DW_TAG_enumeration_type:
9323 this_type = read_enumeration_type (die, cu);
9325 case DW_TAG_subprogram:
9326 case DW_TAG_subroutine_type:
9327 case DW_TAG_inlined_subroutine:
9328 this_type = read_subroutine_type (die, cu);
9330 case DW_TAG_array_type:
9331 this_type = read_array_type (die, cu);
9333 case DW_TAG_set_type:
9334 this_type = read_set_type (die, cu);
9336 case DW_TAG_pointer_type:
9337 this_type = read_tag_pointer_type (die, cu);
9339 case DW_TAG_ptr_to_member_type:
9340 this_type = read_tag_ptr_to_member_type (die, cu);
9342 case DW_TAG_reference_type:
9343 this_type = read_tag_reference_type (die, cu);
9345 case DW_TAG_const_type:
9346 this_type = read_tag_const_type (die, cu);
9348 case DW_TAG_volatile_type:
9349 this_type = read_tag_volatile_type (die, cu);
9351 case DW_TAG_string_type:
9352 this_type = read_tag_string_type (die, cu);
9354 case DW_TAG_typedef:
9355 this_type = read_typedef (die, cu);
9357 case DW_TAG_subrange_type:
9358 this_type = read_subrange_type (die, cu);
9360 case DW_TAG_base_type:
9361 this_type = read_base_type (die, cu);
9363 case DW_TAG_unspecified_type:
9364 this_type = read_unspecified_type (die, cu);
9366 case DW_TAG_namespace:
9367 this_type = read_namespace_type (die, cu);
9370 this_type = read_module_type (die, cu);
9373 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
9374 dwarf_tag_name (die->tag));
9381 /* Return the name of the namespace/class that DIE is defined within,
9382 or "" if we can't tell. The caller should not xfree the result.
9384 For example, if we're within the method foo() in the following
9394 then determine_prefix on foo's die will return "N::C". */
9397 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
9399 struct die_info *parent, *spec_die;
9400 struct dwarf2_cu *spec_cu;
9401 struct type *parent_type;
9403 if (cu->language != language_cplus && cu->language != language_java
9404 && cu->language != language_fortran)
9407 /* We have to be careful in the presence of DW_AT_specification.
9408 For example, with GCC 3.4, given the code
9412 // Definition of N::foo.
9416 then we'll have a tree of DIEs like this:
9418 1: DW_TAG_compile_unit
9419 2: DW_TAG_namespace // N
9420 3: DW_TAG_subprogram // declaration of N::foo
9421 4: DW_TAG_subprogram // definition of N::foo
9422 DW_AT_specification // refers to die #3
9424 Thus, when processing die #4, we have to pretend that we're in
9425 the context of its DW_AT_specification, namely the contex of die
9428 spec_die = die_specification (die, &spec_cu);
9429 if (spec_die == NULL)
9430 parent = die->parent;
9433 parent = spec_die->parent;
9440 switch (parent->tag)
9442 case DW_TAG_namespace:
9443 parent_type = read_type_die (parent, cu);
9444 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9445 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9446 Work around this problem here. */
9447 if (cu->language == language_cplus
9448 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
9450 /* We give a name to even anonymous namespaces. */
9451 return TYPE_TAG_NAME (parent_type);
9452 case DW_TAG_class_type:
9453 case DW_TAG_interface_type:
9454 case DW_TAG_structure_type:
9455 case DW_TAG_union_type:
9457 parent_type = read_type_die (parent, cu);
9458 if (TYPE_TAG_NAME (parent_type) != NULL)
9459 return TYPE_TAG_NAME (parent_type);
9461 /* An anonymous structure is only allowed non-static data
9462 members; no typedefs, no member functions, et cetera.
9463 So it does not need a prefix. */
9466 return determine_prefix (parent, cu);
9470 /* Return a newly-allocated string formed by concatenating PREFIX and
9471 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9472 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9473 perform an obconcat, otherwise allocate storage for the result. The CU argument
9474 is used to determine the language and hence, the appropriate separator. */
9476 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
9479 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
9480 int physname, struct dwarf2_cu *cu)
9482 const char *lead = "";
9485 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
9487 else if (cu->language == language_java)
9489 else if (cu->language == language_fortran && physname)
9491 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
9492 DW_AT_MIPS_linkage_name is preferred and used instead. */
9507 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
9509 strcpy (retval, lead);
9510 strcat (retval, prefix);
9511 strcat (retval, sep);
9512 strcat (retval, suffix);
9517 /* We have an obstack. */
9518 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
9522 /* Return sibling of die, NULL if no sibling. */
9524 static struct die_info *
9525 sibling_die (struct die_info *die)
9527 return die->sibling;
9530 /* Get name of a die, return NULL if not found. */
9533 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
9534 struct obstack *obstack)
9536 if (name && cu->language == language_cplus)
9538 char *canon_name = cp_canonicalize_string (name);
9540 if (canon_name != NULL)
9542 if (strcmp (canon_name, name) != 0)
9543 name = obsavestring (canon_name, strlen (canon_name),
9552 /* Get name of a die, return NULL if not found. */
9555 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
9557 struct attribute *attr;
9559 attr = dwarf2_attr (die, DW_AT_name, cu);
9560 if (!attr || !DW_STRING (attr))
9565 case DW_TAG_compile_unit:
9566 /* Compilation units have a DW_AT_name that is a filename, not
9567 a source language identifier. */
9568 case DW_TAG_enumeration_type:
9569 case DW_TAG_enumerator:
9570 /* These tags always have simple identifiers already; no need
9571 to canonicalize them. */
9572 return DW_STRING (attr);
9574 case DW_TAG_subprogram:
9575 /* Java constructors will all be named "<init>", so return
9576 the class name when we see this special case. */
9577 if (cu->language == language_java
9578 && DW_STRING (attr) != NULL
9579 && strcmp (DW_STRING (attr), "<init>") == 0)
9581 struct dwarf2_cu *spec_cu = cu;
9582 struct die_info *spec_die;
9584 /* GCJ will output '<init>' for Java constructor names.
9585 For this special case, return the name of the parent class. */
9587 /* GCJ may output suprogram DIEs with AT_specification set.
9588 If so, use the name of the specified DIE. */
9589 spec_die = die_specification (die, &spec_cu);
9590 if (spec_die != NULL)
9591 return dwarf2_name (spec_die, spec_cu);
9596 if (die->tag == DW_TAG_class_type)
9597 return dwarf2_name (die, cu);
9599 while (die->tag != DW_TAG_compile_unit);
9603 case DW_TAG_class_type:
9604 case DW_TAG_interface_type:
9605 case DW_TAG_structure_type:
9606 case DW_TAG_union_type:
9607 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9608 structures or unions. These were of the form "._%d" in GCC 4.1,
9609 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9610 and GCC 4.4. We work around this problem by ignoring these. */
9611 if (strncmp (DW_STRING (attr), "._", 2) == 0
9612 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
9620 if (!DW_STRING_IS_CANONICAL (attr))
9623 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
9624 &cu->objfile->objfile_obstack);
9625 DW_STRING_IS_CANONICAL (attr) = 1;
9627 return DW_STRING (attr);
9630 /* Return the die that this die in an extension of, or NULL if there
9631 is none. *EXT_CU is the CU containing DIE on input, and the CU
9632 containing the return value on output. */
9634 static struct die_info *
9635 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
9637 struct attribute *attr;
9639 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
9643 return follow_die_ref (die, attr, ext_cu);
9646 /* Convert a DIE tag into its string name. */
9649 dwarf_tag_name (unsigned tag)
9653 case DW_TAG_padding:
9654 return "DW_TAG_padding";
9655 case DW_TAG_array_type:
9656 return "DW_TAG_array_type";
9657 case DW_TAG_class_type:
9658 return "DW_TAG_class_type";
9659 case DW_TAG_entry_point:
9660 return "DW_TAG_entry_point";
9661 case DW_TAG_enumeration_type:
9662 return "DW_TAG_enumeration_type";
9663 case DW_TAG_formal_parameter:
9664 return "DW_TAG_formal_parameter";
9665 case DW_TAG_imported_declaration:
9666 return "DW_TAG_imported_declaration";
9668 return "DW_TAG_label";
9669 case DW_TAG_lexical_block:
9670 return "DW_TAG_lexical_block";
9672 return "DW_TAG_member";
9673 case DW_TAG_pointer_type:
9674 return "DW_TAG_pointer_type";
9675 case DW_TAG_reference_type:
9676 return "DW_TAG_reference_type";
9677 case DW_TAG_compile_unit:
9678 return "DW_TAG_compile_unit";
9679 case DW_TAG_string_type:
9680 return "DW_TAG_string_type";
9681 case DW_TAG_structure_type:
9682 return "DW_TAG_structure_type";
9683 case DW_TAG_subroutine_type:
9684 return "DW_TAG_subroutine_type";
9685 case DW_TAG_typedef:
9686 return "DW_TAG_typedef";
9687 case DW_TAG_union_type:
9688 return "DW_TAG_union_type";
9689 case DW_TAG_unspecified_parameters:
9690 return "DW_TAG_unspecified_parameters";
9691 case DW_TAG_variant:
9692 return "DW_TAG_variant";
9693 case DW_TAG_common_block:
9694 return "DW_TAG_common_block";
9695 case DW_TAG_common_inclusion:
9696 return "DW_TAG_common_inclusion";
9697 case DW_TAG_inheritance:
9698 return "DW_TAG_inheritance";
9699 case DW_TAG_inlined_subroutine:
9700 return "DW_TAG_inlined_subroutine";
9702 return "DW_TAG_module";
9703 case DW_TAG_ptr_to_member_type:
9704 return "DW_TAG_ptr_to_member_type";
9705 case DW_TAG_set_type:
9706 return "DW_TAG_set_type";
9707 case DW_TAG_subrange_type:
9708 return "DW_TAG_subrange_type";
9709 case DW_TAG_with_stmt:
9710 return "DW_TAG_with_stmt";
9711 case DW_TAG_access_declaration:
9712 return "DW_TAG_access_declaration";
9713 case DW_TAG_base_type:
9714 return "DW_TAG_base_type";
9715 case DW_TAG_catch_block:
9716 return "DW_TAG_catch_block";
9717 case DW_TAG_const_type:
9718 return "DW_TAG_const_type";
9719 case DW_TAG_constant:
9720 return "DW_TAG_constant";
9721 case DW_TAG_enumerator:
9722 return "DW_TAG_enumerator";
9723 case DW_TAG_file_type:
9724 return "DW_TAG_file_type";
9726 return "DW_TAG_friend";
9727 case DW_TAG_namelist:
9728 return "DW_TAG_namelist";
9729 case DW_TAG_namelist_item:
9730 return "DW_TAG_namelist_item";
9731 case DW_TAG_packed_type:
9732 return "DW_TAG_packed_type";
9733 case DW_TAG_subprogram:
9734 return "DW_TAG_subprogram";
9735 case DW_TAG_template_type_param:
9736 return "DW_TAG_template_type_param";
9737 case DW_TAG_template_value_param:
9738 return "DW_TAG_template_value_param";
9739 case DW_TAG_thrown_type:
9740 return "DW_TAG_thrown_type";
9741 case DW_TAG_try_block:
9742 return "DW_TAG_try_block";
9743 case DW_TAG_variant_part:
9744 return "DW_TAG_variant_part";
9745 case DW_TAG_variable:
9746 return "DW_TAG_variable";
9747 case DW_TAG_volatile_type:
9748 return "DW_TAG_volatile_type";
9749 case DW_TAG_dwarf_procedure:
9750 return "DW_TAG_dwarf_procedure";
9751 case DW_TAG_restrict_type:
9752 return "DW_TAG_restrict_type";
9753 case DW_TAG_interface_type:
9754 return "DW_TAG_interface_type";
9755 case DW_TAG_namespace:
9756 return "DW_TAG_namespace";
9757 case DW_TAG_imported_module:
9758 return "DW_TAG_imported_module";
9759 case DW_TAG_unspecified_type:
9760 return "DW_TAG_unspecified_type";
9761 case DW_TAG_partial_unit:
9762 return "DW_TAG_partial_unit";
9763 case DW_TAG_imported_unit:
9764 return "DW_TAG_imported_unit";
9765 case DW_TAG_condition:
9766 return "DW_TAG_condition";
9767 case DW_TAG_shared_type:
9768 return "DW_TAG_shared_type";
9769 case DW_TAG_type_unit:
9770 return "DW_TAG_type_unit";
9771 case DW_TAG_MIPS_loop:
9772 return "DW_TAG_MIPS_loop";
9773 case DW_TAG_HP_array_descriptor:
9774 return "DW_TAG_HP_array_descriptor";
9775 case DW_TAG_format_label:
9776 return "DW_TAG_format_label";
9777 case DW_TAG_function_template:
9778 return "DW_TAG_function_template";
9779 case DW_TAG_class_template:
9780 return "DW_TAG_class_template";
9781 case DW_TAG_GNU_BINCL:
9782 return "DW_TAG_GNU_BINCL";
9783 case DW_TAG_GNU_EINCL:
9784 return "DW_TAG_GNU_EINCL";
9785 case DW_TAG_upc_shared_type:
9786 return "DW_TAG_upc_shared_type";
9787 case DW_TAG_upc_strict_type:
9788 return "DW_TAG_upc_strict_type";
9789 case DW_TAG_upc_relaxed_type:
9790 return "DW_TAG_upc_relaxed_type";
9791 case DW_TAG_PGI_kanji_type:
9792 return "DW_TAG_PGI_kanji_type";
9793 case DW_TAG_PGI_interface_block:
9794 return "DW_TAG_PGI_interface_block";
9796 return "DW_TAG_<unknown>";
9800 /* Convert a DWARF attribute code into its string name. */
9803 dwarf_attr_name (unsigned attr)
9808 return "DW_AT_sibling";
9809 case DW_AT_location:
9810 return "DW_AT_location";
9812 return "DW_AT_name";
9813 case DW_AT_ordering:
9814 return "DW_AT_ordering";
9815 case DW_AT_subscr_data:
9816 return "DW_AT_subscr_data";
9817 case DW_AT_byte_size:
9818 return "DW_AT_byte_size";
9819 case DW_AT_bit_offset:
9820 return "DW_AT_bit_offset";
9821 case DW_AT_bit_size:
9822 return "DW_AT_bit_size";
9823 case DW_AT_element_list:
9824 return "DW_AT_element_list";
9825 case DW_AT_stmt_list:
9826 return "DW_AT_stmt_list";
9828 return "DW_AT_low_pc";
9830 return "DW_AT_high_pc";
9831 case DW_AT_language:
9832 return "DW_AT_language";
9834 return "DW_AT_member";
9836 return "DW_AT_discr";
9837 case DW_AT_discr_value:
9838 return "DW_AT_discr_value";
9839 case DW_AT_visibility:
9840 return "DW_AT_visibility";
9842 return "DW_AT_import";
9843 case DW_AT_string_length:
9844 return "DW_AT_string_length";
9845 case DW_AT_common_reference:
9846 return "DW_AT_common_reference";
9847 case DW_AT_comp_dir:
9848 return "DW_AT_comp_dir";
9849 case DW_AT_const_value:
9850 return "DW_AT_const_value";
9851 case DW_AT_containing_type:
9852 return "DW_AT_containing_type";
9853 case DW_AT_default_value:
9854 return "DW_AT_default_value";
9856 return "DW_AT_inline";
9857 case DW_AT_is_optional:
9858 return "DW_AT_is_optional";
9859 case DW_AT_lower_bound:
9860 return "DW_AT_lower_bound";
9861 case DW_AT_producer:
9862 return "DW_AT_producer";
9863 case DW_AT_prototyped:
9864 return "DW_AT_prototyped";
9865 case DW_AT_return_addr:
9866 return "DW_AT_return_addr";
9867 case DW_AT_start_scope:
9868 return "DW_AT_start_scope";
9869 case DW_AT_bit_stride:
9870 return "DW_AT_bit_stride";
9871 case DW_AT_upper_bound:
9872 return "DW_AT_upper_bound";
9873 case DW_AT_abstract_origin:
9874 return "DW_AT_abstract_origin";
9875 case DW_AT_accessibility:
9876 return "DW_AT_accessibility";
9877 case DW_AT_address_class:
9878 return "DW_AT_address_class";
9879 case DW_AT_artificial:
9880 return "DW_AT_artificial";
9881 case DW_AT_base_types:
9882 return "DW_AT_base_types";
9883 case DW_AT_calling_convention:
9884 return "DW_AT_calling_convention";
9886 return "DW_AT_count";
9887 case DW_AT_data_member_location:
9888 return "DW_AT_data_member_location";
9889 case DW_AT_decl_column:
9890 return "DW_AT_decl_column";
9891 case DW_AT_decl_file:
9892 return "DW_AT_decl_file";
9893 case DW_AT_decl_line:
9894 return "DW_AT_decl_line";
9895 case DW_AT_declaration:
9896 return "DW_AT_declaration";
9897 case DW_AT_discr_list:
9898 return "DW_AT_discr_list";
9899 case DW_AT_encoding:
9900 return "DW_AT_encoding";
9901 case DW_AT_external:
9902 return "DW_AT_external";
9903 case DW_AT_frame_base:
9904 return "DW_AT_frame_base";
9906 return "DW_AT_friend";
9907 case DW_AT_identifier_case:
9908 return "DW_AT_identifier_case";
9909 case DW_AT_macro_info:
9910 return "DW_AT_macro_info";
9911 case DW_AT_namelist_items:
9912 return "DW_AT_namelist_items";
9913 case DW_AT_priority:
9914 return "DW_AT_priority";
9916 return "DW_AT_segment";
9917 case DW_AT_specification:
9918 return "DW_AT_specification";
9919 case DW_AT_static_link:
9920 return "DW_AT_static_link";
9922 return "DW_AT_type";
9923 case DW_AT_use_location:
9924 return "DW_AT_use_location";
9925 case DW_AT_variable_parameter:
9926 return "DW_AT_variable_parameter";
9927 case DW_AT_virtuality:
9928 return "DW_AT_virtuality";
9929 case DW_AT_vtable_elem_location:
9930 return "DW_AT_vtable_elem_location";
9931 /* DWARF 3 values. */
9932 case DW_AT_allocated:
9933 return "DW_AT_allocated";
9934 case DW_AT_associated:
9935 return "DW_AT_associated";
9936 case DW_AT_data_location:
9937 return "DW_AT_data_location";
9938 case DW_AT_byte_stride:
9939 return "DW_AT_byte_stride";
9940 case DW_AT_entry_pc:
9941 return "DW_AT_entry_pc";
9942 case DW_AT_use_UTF8:
9943 return "DW_AT_use_UTF8";
9944 case DW_AT_extension:
9945 return "DW_AT_extension";
9947 return "DW_AT_ranges";
9948 case DW_AT_trampoline:
9949 return "DW_AT_trampoline";
9950 case DW_AT_call_column:
9951 return "DW_AT_call_column";
9952 case DW_AT_call_file:
9953 return "DW_AT_call_file";
9954 case DW_AT_call_line:
9955 return "DW_AT_call_line";
9956 case DW_AT_description:
9957 return "DW_AT_description";
9958 case DW_AT_binary_scale:
9959 return "DW_AT_binary_scale";
9960 case DW_AT_decimal_scale:
9961 return "DW_AT_decimal_scale";
9963 return "DW_AT_small";
9964 case DW_AT_decimal_sign:
9965 return "DW_AT_decimal_sign";
9966 case DW_AT_digit_count:
9967 return "DW_AT_digit_count";
9968 case DW_AT_picture_string:
9969 return "DW_AT_picture_string";
9971 return "DW_AT_mutable";
9972 case DW_AT_threads_scaled:
9973 return "DW_AT_threads_scaled";
9974 case DW_AT_explicit:
9975 return "DW_AT_explicit";
9976 case DW_AT_object_pointer:
9977 return "DW_AT_object_pointer";
9978 case DW_AT_endianity:
9979 return "DW_AT_endianity";
9980 case DW_AT_elemental:
9981 return "DW_AT_elemental";
9983 return "DW_AT_pure";
9984 case DW_AT_recursive:
9985 return "DW_AT_recursive";
9986 /* DWARF 4 values. */
9987 case DW_AT_signature:
9988 return "DW_AT_signature";
9989 case DW_AT_linkage_name:
9990 return "DW_AT_linkage_name";
9991 /* SGI/MIPS extensions. */
9992 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9993 case DW_AT_MIPS_fde:
9994 return "DW_AT_MIPS_fde";
9996 case DW_AT_MIPS_loop_begin:
9997 return "DW_AT_MIPS_loop_begin";
9998 case DW_AT_MIPS_tail_loop_begin:
9999 return "DW_AT_MIPS_tail_loop_begin";
10000 case DW_AT_MIPS_epilog_begin:
10001 return "DW_AT_MIPS_epilog_begin";
10002 case DW_AT_MIPS_loop_unroll_factor:
10003 return "DW_AT_MIPS_loop_unroll_factor";
10004 case DW_AT_MIPS_software_pipeline_depth:
10005 return "DW_AT_MIPS_software_pipeline_depth";
10006 case DW_AT_MIPS_linkage_name:
10007 return "DW_AT_MIPS_linkage_name";
10008 case DW_AT_MIPS_stride:
10009 return "DW_AT_MIPS_stride";
10010 case DW_AT_MIPS_abstract_name:
10011 return "DW_AT_MIPS_abstract_name";
10012 case DW_AT_MIPS_clone_origin:
10013 return "DW_AT_MIPS_clone_origin";
10014 case DW_AT_MIPS_has_inlines:
10015 return "DW_AT_MIPS_has_inlines";
10016 /* HP extensions. */
10017 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
10018 case DW_AT_HP_block_index:
10019 return "DW_AT_HP_block_index";
10021 case DW_AT_HP_unmodifiable:
10022 return "DW_AT_HP_unmodifiable";
10023 case DW_AT_HP_actuals_stmt_list:
10024 return "DW_AT_HP_actuals_stmt_list";
10025 case DW_AT_HP_proc_per_section:
10026 return "DW_AT_HP_proc_per_section";
10027 case DW_AT_HP_raw_data_ptr:
10028 return "DW_AT_HP_raw_data_ptr";
10029 case DW_AT_HP_pass_by_reference:
10030 return "DW_AT_HP_pass_by_reference";
10031 case DW_AT_HP_opt_level:
10032 return "DW_AT_HP_opt_level";
10033 case DW_AT_HP_prof_version_id:
10034 return "DW_AT_HP_prof_version_id";
10035 case DW_AT_HP_opt_flags:
10036 return "DW_AT_HP_opt_flags";
10037 case DW_AT_HP_cold_region_low_pc:
10038 return "DW_AT_HP_cold_region_low_pc";
10039 case DW_AT_HP_cold_region_high_pc:
10040 return "DW_AT_HP_cold_region_high_pc";
10041 case DW_AT_HP_all_variables_modifiable:
10042 return "DW_AT_HP_all_variables_modifiable";
10043 case DW_AT_HP_linkage_name:
10044 return "DW_AT_HP_linkage_name";
10045 case DW_AT_HP_prof_flags:
10046 return "DW_AT_HP_prof_flags";
10047 /* GNU extensions. */
10048 case DW_AT_sf_names:
10049 return "DW_AT_sf_names";
10050 case DW_AT_src_info:
10051 return "DW_AT_src_info";
10052 case DW_AT_mac_info:
10053 return "DW_AT_mac_info";
10054 case DW_AT_src_coords:
10055 return "DW_AT_src_coords";
10056 case DW_AT_body_begin:
10057 return "DW_AT_body_begin";
10058 case DW_AT_body_end:
10059 return "DW_AT_body_end";
10060 case DW_AT_GNU_vector:
10061 return "DW_AT_GNU_vector";
10062 /* VMS extensions. */
10063 case DW_AT_VMS_rtnbeg_pd_address:
10064 return "DW_AT_VMS_rtnbeg_pd_address";
10065 /* UPC extension. */
10066 case DW_AT_upc_threads_scaled:
10067 return "DW_AT_upc_threads_scaled";
10068 /* PGI (STMicroelectronics) extensions. */
10069 case DW_AT_PGI_lbase:
10070 return "DW_AT_PGI_lbase";
10071 case DW_AT_PGI_soffset:
10072 return "DW_AT_PGI_soffset";
10073 case DW_AT_PGI_lstride:
10074 return "DW_AT_PGI_lstride";
10076 return "DW_AT_<unknown>";
10080 /* Convert a DWARF value form code into its string name. */
10083 dwarf_form_name (unsigned form)
10088 return "DW_FORM_addr";
10089 case DW_FORM_block2:
10090 return "DW_FORM_block2";
10091 case DW_FORM_block4:
10092 return "DW_FORM_block4";
10093 case DW_FORM_data2:
10094 return "DW_FORM_data2";
10095 case DW_FORM_data4:
10096 return "DW_FORM_data4";
10097 case DW_FORM_data8:
10098 return "DW_FORM_data8";
10099 case DW_FORM_string:
10100 return "DW_FORM_string";
10101 case DW_FORM_block:
10102 return "DW_FORM_block";
10103 case DW_FORM_block1:
10104 return "DW_FORM_block1";
10105 case DW_FORM_data1:
10106 return "DW_FORM_data1";
10108 return "DW_FORM_flag";
10109 case DW_FORM_sdata:
10110 return "DW_FORM_sdata";
10112 return "DW_FORM_strp";
10113 case DW_FORM_udata:
10114 return "DW_FORM_udata";
10115 case DW_FORM_ref_addr:
10116 return "DW_FORM_ref_addr";
10118 return "DW_FORM_ref1";
10120 return "DW_FORM_ref2";
10122 return "DW_FORM_ref4";
10124 return "DW_FORM_ref8";
10125 case DW_FORM_ref_udata:
10126 return "DW_FORM_ref_udata";
10127 case DW_FORM_indirect:
10128 return "DW_FORM_indirect";
10129 case DW_FORM_sec_offset:
10130 return "DW_FORM_sec_offset";
10131 case DW_FORM_exprloc:
10132 return "DW_FORM_exprloc";
10133 case DW_FORM_flag_present:
10134 return "DW_FORM_flag_present";
10136 return "DW_FORM_sig8";
10138 return "DW_FORM_<unknown>";
10142 /* Convert a DWARF stack opcode into its string name. */
10145 dwarf_stack_op_name (unsigned op, int def)
10150 return "DW_OP_addr";
10152 return "DW_OP_deref";
10153 case DW_OP_const1u:
10154 return "DW_OP_const1u";
10155 case DW_OP_const1s:
10156 return "DW_OP_const1s";
10157 case DW_OP_const2u:
10158 return "DW_OP_const2u";
10159 case DW_OP_const2s:
10160 return "DW_OP_const2s";
10161 case DW_OP_const4u:
10162 return "DW_OP_const4u";
10163 case DW_OP_const4s:
10164 return "DW_OP_const4s";
10165 case DW_OP_const8u:
10166 return "DW_OP_const8u";
10167 case DW_OP_const8s:
10168 return "DW_OP_const8s";
10170 return "DW_OP_constu";
10172 return "DW_OP_consts";
10174 return "DW_OP_dup";
10176 return "DW_OP_drop";
10178 return "DW_OP_over";
10180 return "DW_OP_pick";
10182 return "DW_OP_swap";
10184 return "DW_OP_rot";
10186 return "DW_OP_xderef";
10188 return "DW_OP_abs";
10190 return "DW_OP_and";
10192 return "DW_OP_div";
10194 return "DW_OP_minus";
10196 return "DW_OP_mod";
10198 return "DW_OP_mul";
10200 return "DW_OP_neg";
10202 return "DW_OP_not";
10206 return "DW_OP_plus";
10207 case DW_OP_plus_uconst:
10208 return "DW_OP_plus_uconst";
10210 return "DW_OP_shl";
10212 return "DW_OP_shr";
10214 return "DW_OP_shra";
10216 return "DW_OP_xor";
10218 return "DW_OP_bra";
10232 return "DW_OP_skip";
10234 return "DW_OP_lit0";
10236 return "DW_OP_lit1";
10238 return "DW_OP_lit2";
10240 return "DW_OP_lit3";
10242 return "DW_OP_lit4";
10244 return "DW_OP_lit5";
10246 return "DW_OP_lit6";
10248 return "DW_OP_lit7";
10250 return "DW_OP_lit8";
10252 return "DW_OP_lit9";
10254 return "DW_OP_lit10";
10256 return "DW_OP_lit11";
10258 return "DW_OP_lit12";
10260 return "DW_OP_lit13";
10262 return "DW_OP_lit14";
10264 return "DW_OP_lit15";
10266 return "DW_OP_lit16";
10268 return "DW_OP_lit17";
10270 return "DW_OP_lit18";
10272 return "DW_OP_lit19";
10274 return "DW_OP_lit20";
10276 return "DW_OP_lit21";
10278 return "DW_OP_lit22";
10280 return "DW_OP_lit23";
10282 return "DW_OP_lit24";
10284 return "DW_OP_lit25";
10286 return "DW_OP_lit26";
10288 return "DW_OP_lit27";
10290 return "DW_OP_lit28";
10292 return "DW_OP_lit29";
10294 return "DW_OP_lit30";
10296 return "DW_OP_lit31";
10298 return "DW_OP_reg0";
10300 return "DW_OP_reg1";
10302 return "DW_OP_reg2";
10304 return "DW_OP_reg3";
10306 return "DW_OP_reg4";
10308 return "DW_OP_reg5";
10310 return "DW_OP_reg6";
10312 return "DW_OP_reg7";
10314 return "DW_OP_reg8";
10316 return "DW_OP_reg9";
10318 return "DW_OP_reg10";
10320 return "DW_OP_reg11";
10322 return "DW_OP_reg12";
10324 return "DW_OP_reg13";
10326 return "DW_OP_reg14";
10328 return "DW_OP_reg15";
10330 return "DW_OP_reg16";
10332 return "DW_OP_reg17";
10334 return "DW_OP_reg18";
10336 return "DW_OP_reg19";
10338 return "DW_OP_reg20";
10340 return "DW_OP_reg21";
10342 return "DW_OP_reg22";
10344 return "DW_OP_reg23";
10346 return "DW_OP_reg24";
10348 return "DW_OP_reg25";
10350 return "DW_OP_reg26";
10352 return "DW_OP_reg27";
10354 return "DW_OP_reg28";
10356 return "DW_OP_reg29";
10358 return "DW_OP_reg30";
10360 return "DW_OP_reg31";
10362 return "DW_OP_breg0";
10364 return "DW_OP_breg1";
10366 return "DW_OP_breg2";
10368 return "DW_OP_breg3";
10370 return "DW_OP_breg4";
10372 return "DW_OP_breg5";
10374 return "DW_OP_breg6";
10376 return "DW_OP_breg7";
10378 return "DW_OP_breg8";
10380 return "DW_OP_breg9";
10382 return "DW_OP_breg10";
10384 return "DW_OP_breg11";
10386 return "DW_OP_breg12";
10388 return "DW_OP_breg13";
10390 return "DW_OP_breg14";
10392 return "DW_OP_breg15";
10394 return "DW_OP_breg16";
10396 return "DW_OP_breg17";
10398 return "DW_OP_breg18";
10400 return "DW_OP_breg19";
10402 return "DW_OP_breg20";
10404 return "DW_OP_breg21";
10406 return "DW_OP_breg22";
10408 return "DW_OP_breg23";
10410 return "DW_OP_breg24";
10412 return "DW_OP_breg25";
10414 return "DW_OP_breg26";
10416 return "DW_OP_breg27";
10418 return "DW_OP_breg28";
10420 return "DW_OP_breg29";
10422 return "DW_OP_breg30";
10424 return "DW_OP_breg31";
10426 return "DW_OP_regx";
10428 return "DW_OP_fbreg";
10430 return "DW_OP_bregx";
10432 return "DW_OP_piece";
10433 case DW_OP_deref_size:
10434 return "DW_OP_deref_size";
10435 case DW_OP_xderef_size:
10436 return "DW_OP_xderef_size";
10438 return "DW_OP_nop";
10439 /* DWARF 3 extensions. */
10440 case DW_OP_push_object_address:
10441 return "DW_OP_push_object_address";
10443 return "DW_OP_call2";
10445 return "DW_OP_call4";
10446 case DW_OP_call_ref:
10447 return "DW_OP_call_ref";
10448 case DW_OP_form_tls_address:
10449 return "DW_OP_form_tls_address";
10450 case DW_OP_call_frame_cfa:
10451 return "DW_OP_call_frame_cfa";
10452 case DW_OP_bit_piece:
10453 return "DW_OP_bit_piece";
10454 /* DWARF 4 extensions. */
10455 case DW_OP_implicit_value:
10456 return "DW_OP_implicit_value";
10457 case DW_OP_stack_value:
10458 return "DW_OP_stack_value";
10459 /* GNU extensions. */
10460 case DW_OP_GNU_push_tls_address:
10461 return "DW_OP_GNU_push_tls_address";
10462 case DW_OP_GNU_uninit:
10463 return "DW_OP_GNU_uninit";
10465 return def ? "OP_<unknown>" : NULL;
10470 dwarf_bool_name (unsigned mybool)
10478 /* Convert a DWARF type code into its string name. */
10481 dwarf_type_encoding_name (unsigned enc)
10486 return "DW_ATE_void";
10487 case DW_ATE_address:
10488 return "DW_ATE_address";
10489 case DW_ATE_boolean:
10490 return "DW_ATE_boolean";
10491 case DW_ATE_complex_float:
10492 return "DW_ATE_complex_float";
10494 return "DW_ATE_float";
10495 case DW_ATE_signed:
10496 return "DW_ATE_signed";
10497 case DW_ATE_signed_char:
10498 return "DW_ATE_signed_char";
10499 case DW_ATE_unsigned:
10500 return "DW_ATE_unsigned";
10501 case DW_ATE_unsigned_char:
10502 return "DW_ATE_unsigned_char";
10504 case DW_ATE_imaginary_float:
10505 return "DW_ATE_imaginary_float";
10506 case DW_ATE_packed_decimal:
10507 return "DW_ATE_packed_decimal";
10508 case DW_ATE_numeric_string:
10509 return "DW_ATE_numeric_string";
10510 case DW_ATE_edited:
10511 return "DW_ATE_edited";
10512 case DW_ATE_signed_fixed:
10513 return "DW_ATE_signed_fixed";
10514 case DW_ATE_unsigned_fixed:
10515 return "DW_ATE_unsigned_fixed";
10516 case DW_ATE_decimal_float:
10517 return "DW_ATE_decimal_float";
10520 return "DW_ATE_UTF";
10521 /* HP extensions. */
10522 case DW_ATE_HP_float80:
10523 return "DW_ATE_HP_float80";
10524 case DW_ATE_HP_complex_float80:
10525 return "DW_ATE_HP_complex_float80";
10526 case DW_ATE_HP_float128:
10527 return "DW_ATE_HP_float128";
10528 case DW_ATE_HP_complex_float128:
10529 return "DW_ATE_HP_complex_float128";
10530 case DW_ATE_HP_floathpintel:
10531 return "DW_ATE_HP_floathpintel";
10532 case DW_ATE_HP_imaginary_float80:
10533 return "DW_ATE_HP_imaginary_float80";
10534 case DW_ATE_HP_imaginary_float128:
10535 return "DW_ATE_HP_imaginary_float128";
10537 return "DW_ATE_<unknown>";
10541 /* Convert a DWARF call frame info operation to its string name. */
10545 dwarf_cfi_name (unsigned cfi_opc)
10549 case DW_CFA_advance_loc:
10550 return "DW_CFA_advance_loc";
10551 case DW_CFA_offset:
10552 return "DW_CFA_offset";
10553 case DW_CFA_restore:
10554 return "DW_CFA_restore";
10556 return "DW_CFA_nop";
10557 case DW_CFA_set_loc:
10558 return "DW_CFA_set_loc";
10559 case DW_CFA_advance_loc1:
10560 return "DW_CFA_advance_loc1";
10561 case DW_CFA_advance_loc2:
10562 return "DW_CFA_advance_loc2";
10563 case DW_CFA_advance_loc4:
10564 return "DW_CFA_advance_loc4";
10565 case DW_CFA_offset_extended:
10566 return "DW_CFA_offset_extended";
10567 case DW_CFA_restore_extended:
10568 return "DW_CFA_restore_extended";
10569 case DW_CFA_undefined:
10570 return "DW_CFA_undefined";
10571 case DW_CFA_same_value:
10572 return "DW_CFA_same_value";
10573 case DW_CFA_register:
10574 return "DW_CFA_register";
10575 case DW_CFA_remember_state:
10576 return "DW_CFA_remember_state";
10577 case DW_CFA_restore_state:
10578 return "DW_CFA_restore_state";
10579 case DW_CFA_def_cfa:
10580 return "DW_CFA_def_cfa";
10581 case DW_CFA_def_cfa_register:
10582 return "DW_CFA_def_cfa_register";
10583 case DW_CFA_def_cfa_offset:
10584 return "DW_CFA_def_cfa_offset";
10586 case DW_CFA_def_cfa_expression:
10587 return "DW_CFA_def_cfa_expression";
10588 case DW_CFA_expression:
10589 return "DW_CFA_expression";
10590 case DW_CFA_offset_extended_sf:
10591 return "DW_CFA_offset_extended_sf";
10592 case DW_CFA_def_cfa_sf:
10593 return "DW_CFA_def_cfa_sf";
10594 case DW_CFA_def_cfa_offset_sf:
10595 return "DW_CFA_def_cfa_offset_sf";
10596 case DW_CFA_val_offset:
10597 return "DW_CFA_val_offset";
10598 case DW_CFA_val_offset_sf:
10599 return "DW_CFA_val_offset_sf";
10600 case DW_CFA_val_expression:
10601 return "DW_CFA_val_expression";
10602 /* SGI/MIPS specific. */
10603 case DW_CFA_MIPS_advance_loc8:
10604 return "DW_CFA_MIPS_advance_loc8";
10605 /* GNU extensions. */
10606 case DW_CFA_GNU_window_save:
10607 return "DW_CFA_GNU_window_save";
10608 case DW_CFA_GNU_args_size:
10609 return "DW_CFA_GNU_args_size";
10610 case DW_CFA_GNU_negative_offset_extended:
10611 return "DW_CFA_GNU_negative_offset_extended";
10613 return "DW_CFA_<unknown>";
10619 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
10623 print_spaces (indent, f);
10624 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
10625 dwarf_tag_name (die->tag), die->abbrev, die->offset);
10627 if (die->parent != NULL)
10629 print_spaces (indent, f);
10630 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
10631 die->parent->offset);
10634 print_spaces (indent, f);
10635 fprintf_unfiltered (f, " has children: %s\n",
10636 dwarf_bool_name (die->child != NULL));
10638 print_spaces (indent, f);
10639 fprintf_unfiltered (f, " attributes:\n");
10641 for (i = 0; i < die->num_attrs; ++i)
10643 print_spaces (indent, f);
10644 fprintf_unfiltered (f, " %s (%s) ",
10645 dwarf_attr_name (die->attrs[i].name),
10646 dwarf_form_name (die->attrs[i].form));
10648 switch (die->attrs[i].form)
10650 case DW_FORM_ref_addr:
10652 fprintf_unfiltered (f, "address: ");
10653 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
10655 case DW_FORM_block2:
10656 case DW_FORM_block4:
10657 case DW_FORM_block:
10658 case DW_FORM_block1:
10659 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
10661 case DW_FORM_exprloc:
10662 fprintf_unfiltered (f, "expression: size %u",
10663 DW_BLOCK (&die->attrs[i])->size);
10668 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
10669 (long) (DW_ADDR (&die->attrs[i])));
10671 case DW_FORM_data1:
10672 case DW_FORM_data2:
10673 case DW_FORM_data4:
10674 case DW_FORM_data8:
10675 case DW_FORM_udata:
10676 case DW_FORM_sdata:
10677 fprintf_unfiltered (f, "constant: %s",
10678 pulongest (DW_UNSND (&die->attrs[i])));
10680 case DW_FORM_sec_offset:
10681 fprintf_unfiltered (f, "section offset: %s",
10682 pulongest (DW_UNSND (&die->attrs[i])));
10685 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
10686 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
10687 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
10689 fprintf_unfiltered (f, "signatured type, offset: unknown");
10691 case DW_FORM_string:
10693 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
10694 DW_STRING (&die->attrs[i])
10695 ? DW_STRING (&die->attrs[i]) : "",
10696 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
10699 if (DW_UNSND (&die->attrs[i]))
10700 fprintf_unfiltered (f, "flag: TRUE");
10702 fprintf_unfiltered (f, "flag: FALSE");
10704 case DW_FORM_flag_present:
10705 fprintf_unfiltered (f, "flag: TRUE");
10707 case DW_FORM_indirect:
10708 /* the reader will have reduced the indirect form to
10709 the "base form" so this form should not occur */
10710 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
10713 fprintf_unfiltered (f, "unsupported attribute form: %d.",
10714 die->attrs[i].form);
10717 fprintf_unfiltered (f, "\n");
10722 dump_die_for_error (struct die_info *die)
10724 dump_die_shallow (gdb_stderr, 0, die);
10728 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
10730 int indent = level * 4;
10732 gdb_assert (die != NULL);
10734 if (level >= max_level)
10737 dump_die_shallow (f, indent, die);
10739 if (die->child != NULL)
10741 print_spaces (indent, f);
10742 fprintf_unfiltered (f, " Children:");
10743 if (level + 1 < max_level)
10745 fprintf_unfiltered (f, "\n");
10746 dump_die_1 (f, level + 1, max_level, die->child);
10750 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
10754 if (die->sibling != NULL && level > 0)
10756 dump_die_1 (f, level, max_level, die->sibling);
10760 /* This is called from the pdie macro in gdbinit.in.
10761 It's not static so gcc will keep a copy callable from gdb. */
10764 dump_die (struct die_info *die, int max_level)
10766 dump_die_1 (gdb_stdlog, 0, max_level, die);
10770 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
10774 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
10780 is_ref_attr (struct attribute *attr)
10782 switch (attr->form)
10784 case DW_FORM_ref_addr:
10789 case DW_FORM_ref_udata:
10796 static unsigned int
10797 dwarf2_get_ref_die_offset (struct attribute *attr)
10799 if (is_ref_attr (attr))
10800 return DW_ADDR (attr);
10802 complaint (&symfile_complaints,
10803 _("unsupported die ref attribute form: '%s'"),
10804 dwarf_form_name (attr->form));
10808 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10809 * the value held by the attribute is not constant. */
10812 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
10814 if (attr->form == DW_FORM_sdata)
10815 return DW_SND (attr);
10816 else if (attr->form == DW_FORM_udata
10817 || attr->form == DW_FORM_data1
10818 || attr->form == DW_FORM_data2
10819 || attr->form == DW_FORM_data4
10820 || attr->form == DW_FORM_data8)
10821 return DW_UNSND (attr);
10824 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
10825 dwarf_form_name (attr->form));
10826 return default_value;
10830 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10831 unit and add it to our queue.
10832 The result is non-zero if PER_CU was queued, otherwise the result is zero
10833 meaning either PER_CU is already queued or it is already loaded. */
10836 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
10837 struct dwarf2_per_cu_data *per_cu)
10839 /* Mark the dependence relation so that we don't flush PER_CU
10841 dwarf2_add_dependence (this_cu, per_cu);
10843 /* If it's already on the queue, we have nothing to do. */
10844 if (per_cu->queued)
10847 /* If the compilation unit is already loaded, just mark it as
10849 if (per_cu->cu != NULL)
10851 per_cu->cu->last_used = 0;
10855 /* Add it to the queue. */
10856 queue_comp_unit (per_cu, this_cu->objfile);
10861 /* Follow reference or signature attribute ATTR of SRC_DIE.
10862 On entry *REF_CU is the CU of SRC_DIE.
10863 On exit *REF_CU is the CU of the result. */
10865 static struct die_info *
10866 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
10867 struct dwarf2_cu **ref_cu)
10869 struct die_info *die;
10871 if (is_ref_attr (attr))
10872 die = follow_die_ref (src_die, attr, ref_cu);
10873 else if (attr->form == DW_FORM_sig8)
10874 die = follow_die_sig (src_die, attr, ref_cu);
10877 dump_die_for_error (src_die);
10878 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10879 (*ref_cu)->objfile->name);
10885 /* Follow reference OFFSET.
10886 On entry *REF_CU is the CU of source DIE referencing OFFSET.
10887 On exit *REF_CU is the CU of the result. */
10889 static struct die_info *
10890 follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
10892 struct die_info temp_die;
10893 struct dwarf2_cu *target_cu, *cu = *ref_cu;
10895 gdb_assert (cu->per_cu != NULL);
10897 if (cu->per_cu->from_debug_types)
10899 /* .debug_types CUs cannot reference anything outside their CU.
10900 If they need to, they have to reference a signatured type via
10902 if (! offset_in_cu_p (&cu->header, offset))
10906 else if (! offset_in_cu_p (&cu->header, offset))
10908 struct dwarf2_per_cu_data *per_cu;
10910 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
10912 /* If necessary, add it to the queue and load its DIEs. */
10913 if (maybe_queue_comp_unit (cu, per_cu))
10914 load_full_comp_unit (per_cu, cu->objfile);
10916 target_cu = per_cu->cu;
10921 *ref_cu = target_cu;
10922 temp_die.offset = offset;
10923 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
10926 /* Follow reference attribute ATTR of SRC_DIE.
10927 On entry *REF_CU is the CU of SRC_DIE.
10928 On exit *REF_CU is the CU of the result. */
10930 static struct die_info *
10931 follow_die_ref (struct die_info *src_die, struct attribute *attr,
10932 struct dwarf2_cu **ref_cu)
10934 unsigned int offset = dwarf2_get_ref_die_offset (attr);
10935 struct dwarf2_cu *cu = *ref_cu;
10936 struct die_info *die;
10938 die = follow_die_offset (offset, ref_cu);
10940 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10941 "at 0x%x [in module %s]"),
10942 offset, src_die->offset, cu->objfile->name);
10947 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
10948 value is intended for DW_OP_call*. */
10950 struct dwarf2_locexpr_baton
10951 dwarf2_fetch_die_location_block (unsigned int offset,
10952 struct dwarf2_per_cu_data *per_cu)
10954 struct dwarf2_cu *cu = per_cu->cu;
10955 struct die_info *die;
10956 struct attribute *attr;
10957 struct dwarf2_locexpr_baton retval;
10959 die = follow_die_offset (offset, &cu);
10961 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
10962 offset, per_cu->cu->objfile->name);
10964 attr = dwarf2_attr (die, DW_AT_location, cu);
10967 /* DWARF: "If there is no such attribute, then there is no effect.". */
10969 retval.data = NULL;
10974 if (!attr_form_is_block (attr))
10975 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
10976 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
10977 offset, per_cu->cu->objfile->name);
10979 retval.data = DW_BLOCK (attr)->data;
10980 retval.size = DW_BLOCK (attr)->size;
10982 retval.per_cu = cu->per_cu;
10986 /* Follow the signature attribute ATTR in SRC_DIE.
10987 On entry *REF_CU is the CU of SRC_DIE.
10988 On exit *REF_CU is the CU of the result. */
10990 static struct die_info *
10991 follow_die_sig (struct die_info *src_die, struct attribute *attr,
10992 struct dwarf2_cu **ref_cu)
10994 struct objfile *objfile = (*ref_cu)->objfile;
10995 struct die_info temp_die;
10996 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
10997 struct dwarf2_cu *sig_cu;
10998 struct die_info *die;
11000 /* sig_type will be NULL if the signatured type is missing from
11002 if (sig_type == NULL)
11003 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11004 "at 0x%x [in module %s]"),
11005 src_die->offset, objfile->name);
11007 /* If necessary, add it to the queue and load its DIEs. */
11009 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
11010 read_signatured_type (objfile, sig_type);
11012 gdb_assert (sig_type->per_cu.cu != NULL);
11014 sig_cu = sig_type->per_cu.cu;
11015 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
11016 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
11023 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
11024 "at 0x%x [in module %s]"),
11025 sig_type->type_offset, src_die->offset, objfile->name);
11028 /* Given an offset of a signatured type, return its signatured_type. */
11030 static struct signatured_type *
11031 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
11033 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
11034 unsigned int length, initial_length_size;
11035 unsigned int sig_offset;
11036 struct signatured_type find_entry, *type_sig;
11038 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
11039 sig_offset = (initial_length_size
11041 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
11042 + 1 /*address_size*/);
11043 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
11044 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
11046 /* This is only used to lookup previously recorded types.
11047 If we didn't find it, it's our bug. */
11048 gdb_assert (type_sig != NULL);
11049 gdb_assert (offset == type_sig->offset);
11054 /* Read in signatured type at OFFSET and build its CU and die(s). */
11057 read_signatured_type_at_offset (struct objfile *objfile,
11058 unsigned int offset)
11060 struct signatured_type *type_sig;
11062 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
11064 /* We have the section offset, but we need the signature to do the
11065 hash table lookup. */
11066 type_sig = lookup_signatured_type_at_offset (objfile, offset);
11068 gdb_assert (type_sig->per_cu.cu == NULL);
11070 read_signatured_type (objfile, type_sig);
11072 gdb_assert (type_sig->per_cu.cu != NULL);
11075 /* Read in a signatured type and build its CU and DIEs. */
11078 read_signatured_type (struct objfile *objfile,
11079 struct signatured_type *type_sig)
11081 gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
11082 struct die_reader_specs reader_specs;
11083 struct dwarf2_cu *cu;
11084 ULONGEST signature;
11085 struct cleanup *back_to, *free_cu_cleanup;
11086 struct attribute *attr;
11088 gdb_assert (type_sig->per_cu.cu == NULL);
11090 cu = xmalloc (sizeof (struct dwarf2_cu));
11091 memset (cu, 0, sizeof (struct dwarf2_cu));
11092 obstack_init (&cu->comp_unit_obstack);
11093 cu->objfile = objfile;
11094 type_sig->per_cu.cu = cu;
11095 cu->per_cu = &type_sig->per_cu;
11097 /* If an error occurs while loading, release our storage. */
11098 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
11100 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
11101 types_ptr, objfile->obfd);
11102 gdb_assert (signature == type_sig->signature);
11105 = htab_create_alloc_ex (cu->header.length / 12,
11109 &cu->comp_unit_obstack,
11110 hashtab_obstack_allocate,
11111 dummy_obstack_deallocate);
11113 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
11114 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
11116 init_cu_die_reader (&reader_specs, cu);
11118 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
11121 /* We try not to read any attributes in this function, because not
11122 all objfiles needed for references have been loaded yet, and symbol
11123 table processing isn't initialized. But we have to set the CU language,
11124 or we won't be able to build types correctly. */
11125 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
11127 set_cu_language (DW_UNSND (attr), cu);
11129 set_cu_language (language_minimal, cu);
11131 do_cleanups (back_to);
11133 /* We've successfully allocated this compilation unit. Let our caller
11134 clean it up when finished with it. */
11135 discard_cleanups (free_cu_cleanup);
11137 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
11138 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
11141 /* Decode simple location descriptions.
11142 Given a pointer to a dwarf block that defines a location, compute
11143 the location and return the value.
11145 NOTE drow/2003-11-18: This function is called in two situations
11146 now: for the address of static or global variables (partial symbols
11147 only) and for offsets into structures which are expected to be
11148 (more or less) constant. The partial symbol case should go away,
11149 and only the constant case should remain. That will let this
11150 function complain more accurately. A few special modes are allowed
11151 without complaint for global variables (for instance, global
11152 register values and thread-local values).
11154 A location description containing no operations indicates that the
11155 object is optimized out. The return value is 0 for that case.
11156 FIXME drow/2003-11-16: No callers check for this case any more; soon all
11157 callers will only want a very basic result and this can become a
11160 Note that stack[0] is unused except as a default error return.
11161 Note that stack overflow is not yet handled. */
11164 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
11166 struct objfile *objfile = cu->objfile;
11168 int size = blk->size;
11169 gdb_byte *data = blk->data;
11170 CORE_ADDR stack[64];
11172 unsigned int bytes_read, unsnd;
11216 stack[++stacki] = op - DW_OP_lit0;
11251 stack[++stacki] = op - DW_OP_reg0;
11253 dwarf2_complex_location_expr_complaint ();
11257 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
11259 stack[++stacki] = unsnd;
11261 dwarf2_complex_location_expr_complaint ();
11265 stack[++stacki] = read_address (objfile->obfd, &data[i],
11270 case DW_OP_const1u:
11271 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
11275 case DW_OP_const1s:
11276 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
11280 case DW_OP_const2u:
11281 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
11285 case DW_OP_const2s:
11286 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
11290 case DW_OP_const4u:
11291 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
11295 case DW_OP_const4s:
11296 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
11301 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
11307 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
11312 stack[stacki + 1] = stack[stacki];
11317 stack[stacki - 1] += stack[stacki];
11321 case DW_OP_plus_uconst:
11322 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
11327 stack[stacki - 1] -= stack[stacki];
11332 /* If we're not the last op, then we definitely can't encode
11333 this using GDB's address_class enum. This is valid for partial
11334 global symbols, although the variable's address will be bogus
11337 dwarf2_complex_location_expr_complaint ();
11340 case DW_OP_GNU_push_tls_address:
11341 /* The top of the stack has the offset from the beginning
11342 of the thread control block at which the variable is located. */
11343 /* Nothing should follow this operator, so the top of stack would
11345 /* This is valid for partial global symbols, but the variable's
11346 address will be bogus in the psymtab. */
11348 dwarf2_complex_location_expr_complaint ();
11351 case DW_OP_GNU_uninit:
11355 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
11356 dwarf_stack_op_name (op, 1));
11357 return (stack[stacki]);
11360 return (stack[stacki]);
11363 /* memory allocation interface */
11365 static struct dwarf_block *
11366 dwarf_alloc_block (struct dwarf2_cu *cu)
11368 struct dwarf_block *blk;
11370 blk = (struct dwarf_block *)
11371 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
11375 static struct abbrev_info *
11376 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
11378 struct abbrev_info *abbrev;
11380 abbrev = (struct abbrev_info *)
11381 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
11382 memset (abbrev, 0, sizeof (struct abbrev_info));
11386 static struct die_info *
11387 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
11389 struct die_info *die;
11390 size_t size = sizeof (struct die_info);
11393 size += (num_attrs - 1) * sizeof (struct attribute);
11395 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
11396 memset (die, 0, sizeof (struct die_info));
11401 /* Macro support. */
11404 /* Return the full name of file number I in *LH's file name table.
11405 Use COMP_DIR as the name of the current directory of the
11406 compilation. The result is allocated using xmalloc; the caller is
11407 responsible for freeing it. */
11409 file_full_name (int file, struct line_header *lh, const char *comp_dir)
11411 /* Is the file number a valid index into the line header's file name
11412 table? Remember that file numbers start with one, not zero. */
11413 if (1 <= file && file <= lh->num_file_names)
11415 struct file_entry *fe = &lh->file_names[file - 1];
11417 if (IS_ABSOLUTE_PATH (fe->name))
11418 return xstrdup (fe->name);
11426 dir = lh->include_dirs[fe->dir_index - 1];
11432 dir_len = strlen (dir);
11433 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
11434 strcpy (full_name, dir);
11435 full_name[dir_len] = '/';
11436 strcpy (full_name + dir_len + 1, fe->name);
11440 return xstrdup (fe->name);
11445 /* The compiler produced a bogus file number. We can at least
11446 record the macro definitions made in the file, even if we
11447 won't be able to find the file by name. */
11448 char fake_name[80];
11450 sprintf (fake_name, "<bad macro file number %d>", file);
11452 complaint (&symfile_complaints,
11453 _("bad file number in macro information (%d)"),
11456 return xstrdup (fake_name);
11461 static struct macro_source_file *
11462 macro_start_file (int file, int line,
11463 struct macro_source_file *current_file,
11464 const char *comp_dir,
11465 struct line_header *lh, struct objfile *objfile)
11467 /* The full name of this source file. */
11468 char *full_name = file_full_name (file, lh, comp_dir);
11470 /* We don't create a macro table for this compilation unit
11471 at all until we actually get a filename. */
11472 if (! pending_macros)
11473 pending_macros = new_macro_table (&objfile->objfile_obstack,
11474 objfile->macro_cache);
11476 if (! current_file)
11477 /* If we have no current file, then this must be the start_file
11478 directive for the compilation unit's main source file. */
11479 current_file = macro_set_main (pending_macros, full_name);
11481 current_file = macro_include (current_file, line, full_name);
11485 return current_file;
11489 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11490 followed by a null byte. */
11492 copy_string (const char *buf, int len)
11494 char *s = xmalloc (len + 1);
11496 memcpy (s, buf, len);
11502 static const char *
11503 consume_improper_spaces (const char *p, const char *body)
11507 complaint (&symfile_complaints,
11508 _("macro definition contains spaces in formal argument list:\n`%s'"),
11520 parse_macro_definition (struct macro_source_file *file, int line,
11525 /* The body string takes one of two forms. For object-like macro
11526 definitions, it should be:
11528 <macro name> " " <definition>
11530 For function-like macro definitions, it should be:
11532 <macro name> "() " <definition>
11534 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11536 Spaces may appear only where explicitly indicated, and in the
11539 The Dwarf 2 spec says that an object-like macro's name is always
11540 followed by a space, but versions of GCC around March 2002 omit
11541 the space when the macro's definition is the empty string.
11543 The Dwarf 2 spec says that there should be no spaces between the
11544 formal arguments in a function-like macro's formal argument list,
11545 but versions of GCC around March 2002 include spaces after the
11549 /* Find the extent of the macro name. The macro name is terminated
11550 by either a space or null character (for an object-like macro) or
11551 an opening paren (for a function-like macro). */
11552 for (p = body; *p; p++)
11553 if (*p == ' ' || *p == '(')
11556 if (*p == ' ' || *p == '\0')
11558 /* It's an object-like macro. */
11559 int name_len = p - body;
11560 char *name = copy_string (body, name_len);
11561 const char *replacement;
11564 replacement = body + name_len + 1;
11567 dwarf2_macro_malformed_definition_complaint (body);
11568 replacement = body + name_len;
11571 macro_define_object (file, line, name, replacement);
11575 else if (*p == '(')
11577 /* It's a function-like macro. */
11578 char *name = copy_string (body, p - body);
11581 char **argv = xmalloc (argv_size * sizeof (*argv));
11585 p = consume_improper_spaces (p, body);
11587 /* Parse the formal argument list. */
11588 while (*p && *p != ')')
11590 /* Find the extent of the current argument name. */
11591 const char *arg_start = p;
11593 while (*p && *p != ',' && *p != ')' && *p != ' ')
11596 if (! *p || p == arg_start)
11597 dwarf2_macro_malformed_definition_complaint (body);
11600 /* Make sure argv has room for the new argument. */
11601 if (argc >= argv_size)
11604 argv = xrealloc (argv, argv_size * sizeof (*argv));
11607 argv[argc++] = copy_string (arg_start, p - arg_start);
11610 p = consume_improper_spaces (p, body);
11612 /* Consume the comma, if present. */
11617 p = consume_improper_spaces (p, body);
11626 /* Perfectly formed definition, no complaints. */
11627 macro_define_function (file, line, name,
11628 argc, (const char **) argv,
11630 else if (*p == '\0')
11632 /* Complain, but do define it. */
11633 dwarf2_macro_malformed_definition_complaint (body);
11634 macro_define_function (file, line, name,
11635 argc, (const char **) argv,
11639 /* Just complain. */
11640 dwarf2_macro_malformed_definition_complaint (body);
11643 /* Just complain. */
11644 dwarf2_macro_malformed_definition_complaint (body);
11650 for (i = 0; i < argc; i++)
11656 dwarf2_macro_malformed_definition_complaint (body);
11661 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
11662 char *comp_dir, bfd *abfd,
11663 struct dwarf2_cu *cu)
11665 gdb_byte *mac_ptr, *mac_end;
11666 struct macro_source_file *current_file = 0;
11667 enum dwarf_macinfo_record_type macinfo_type;
11668 int at_commandline;
11670 dwarf2_read_section (dwarf2_per_objfile->objfile,
11671 &dwarf2_per_objfile->macinfo);
11672 if (dwarf2_per_objfile->macinfo.buffer == NULL)
11674 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
11678 /* First pass: Find the name of the base filename.
11679 This filename is needed in order to process all macros whose definition
11680 (or undefinition) comes from the command line. These macros are defined
11681 before the first DW_MACINFO_start_file entry, and yet still need to be
11682 associated to the base file.
11684 To determine the base file name, we scan the macro definitions until we
11685 reach the first DW_MACINFO_start_file entry. We then initialize
11686 CURRENT_FILE accordingly so that any macro definition found before the
11687 first DW_MACINFO_start_file can still be associated to the base file. */
11689 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11690 mac_end = dwarf2_per_objfile->macinfo.buffer
11691 + dwarf2_per_objfile->macinfo.size;
11695 /* Do we at least have room for a macinfo type byte? */
11696 if (mac_ptr >= mac_end)
11698 /* Complaint is printed during the second pass as GDB will probably
11699 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11703 macinfo_type = read_1_byte (abfd, mac_ptr);
11706 switch (macinfo_type)
11708 /* A zero macinfo type indicates the end of the macro
11713 case DW_MACINFO_define:
11714 case DW_MACINFO_undef:
11715 /* Only skip the data by MAC_PTR. */
11717 unsigned int bytes_read;
11719 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11720 mac_ptr += bytes_read;
11721 read_string (abfd, mac_ptr, &bytes_read);
11722 mac_ptr += bytes_read;
11726 case DW_MACINFO_start_file:
11728 unsigned int bytes_read;
11731 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11732 mac_ptr += bytes_read;
11733 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11734 mac_ptr += bytes_read;
11736 current_file = macro_start_file (file, line, current_file, comp_dir,
11741 case DW_MACINFO_end_file:
11742 /* No data to skip by MAC_PTR. */
11745 case DW_MACINFO_vendor_ext:
11746 /* Only skip the data by MAC_PTR. */
11748 unsigned int bytes_read;
11750 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11751 mac_ptr += bytes_read;
11752 read_string (abfd, mac_ptr, &bytes_read);
11753 mac_ptr += bytes_read;
11760 } while (macinfo_type != 0 && current_file == NULL);
11762 /* Second pass: Process all entries.
11764 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11765 command-line macro definitions/undefinitions. This flag is unset when we
11766 reach the first DW_MACINFO_start_file entry. */
11768 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11770 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11771 GDB is still reading the definitions from command line. First
11772 DW_MACINFO_start_file will need to be ignored as it was already executed
11773 to create CURRENT_FILE for the main source holding also the command line
11774 definitions. On first met DW_MACINFO_start_file this flag is reset to
11775 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11777 at_commandline = 1;
11781 /* Do we at least have room for a macinfo type byte? */
11782 if (mac_ptr >= mac_end)
11784 dwarf2_macros_too_long_complaint ();
11788 macinfo_type = read_1_byte (abfd, mac_ptr);
11791 switch (macinfo_type)
11793 /* A zero macinfo type indicates the end of the macro
11798 case DW_MACINFO_define:
11799 case DW_MACINFO_undef:
11801 unsigned int bytes_read;
11805 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11806 mac_ptr += bytes_read;
11807 body = read_string (abfd, mac_ptr, &bytes_read);
11808 mac_ptr += bytes_read;
11810 if (! current_file)
11812 /* DWARF violation as no main source is present. */
11813 complaint (&symfile_complaints,
11814 _("debug info with no main source gives macro %s "
11816 macinfo_type == DW_MACINFO_define ?
11818 macinfo_type == DW_MACINFO_undef ?
11819 _("undefinition") :
11820 _("something-or-other"), line, body);
11823 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11824 complaint (&symfile_complaints,
11825 _("debug info gives %s macro %s with %s line %d: %s"),
11826 at_commandline ? _("command-line") : _("in-file"),
11827 macinfo_type == DW_MACINFO_define ?
11829 macinfo_type == DW_MACINFO_undef ?
11830 _("undefinition") :
11831 _("something-or-other"),
11832 line == 0 ? _("zero") : _("non-zero"), line, body);
11834 if (macinfo_type == DW_MACINFO_define)
11835 parse_macro_definition (current_file, line, body);
11836 else if (macinfo_type == DW_MACINFO_undef)
11837 macro_undef (current_file, line, body);
11841 case DW_MACINFO_start_file:
11843 unsigned int bytes_read;
11846 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11847 mac_ptr += bytes_read;
11848 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11849 mac_ptr += bytes_read;
11851 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11852 complaint (&symfile_complaints,
11853 _("debug info gives source %d included "
11854 "from %s at %s line %d"),
11855 file, at_commandline ? _("command-line") : _("file"),
11856 line == 0 ? _("zero") : _("non-zero"), line);
11858 if (at_commandline)
11860 /* This DW_MACINFO_start_file was executed in the pass one. */
11861 at_commandline = 0;
11864 current_file = macro_start_file (file, line,
11865 current_file, comp_dir,
11870 case DW_MACINFO_end_file:
11871 if (! current_file)
11872 complaint (&symfile_complaints,
11873 _("macro debug info has an unmatched `close_file' directive"));
11876 current_file = current_file->included_by;
11877 if (! current_file)
11879 enum dwarf_macinfo_record_type next_type;
11881 /* GCC circa March 2002 doesn't produce the zero
11882 type byte marking the end of the compilation
11883 unit. Complain if it's not there, but exit no
11886 /* Do we at least have room for a macinfo type byte? */
11887 if (mac_ptr >= mac_end)
11889 dwarf2_macros_too_long_complaint ();
11893 /* We don't increment mac_ptr here, so this is just
11895 next_type = read_1_byte (abfd, mac_ptr);
11896 if (next_type != 0)
11897 complaint (&symfile_complaints,
11898 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11905 case DW_MACINFO_vendor_ext:
11907 unsigned int bytes_read;
11911 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11912 mac_ptr += bytes_read;
11913 string = read_string (abfd, mac_ptr, &bytes_read);
11914 mac_ptr += bytes_read;
11916 /* We don't recognize any vendor extensions. */
11920 } while (macinfo_type != 0);
11923 /* Check if the attribute's form is a DW_FORM_block*
11924 if so return true else false. */
11926 attr_form_is_block (struct attribute *attr)
11928 return (attr == NULL ? 0 :
11929 attr->form == DW_FORM_block1
11930 || attr->form == DW_FORM_block2
11931 || attr->form == DW_FORM_block4
11932 || attr->form == DW_FORM_block
11933 || attr->form == DW_FORM_exprloc);
11936 /* Return non-zero if ATTR's value is a section offset --- classes
11937 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11938 You may use DW_UNSND (attr) to retrieve such offsets.
11940 Section 7.5.4, "Attribute Encodings", explains that no attribute
11941 may have a value that belongs to more than one of these classes; it
11942 would be ambiguous if we did, because we use the same forms for all
11945 attr_form_is_section_offset (struct attribute *attr)
11947 return (attr->form == DW_FORM_data4
11948 || attr->form == DW_FORM_data8
11949 || attr->form == DW_FORM_sec_offset);
11953 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11954 zero otherwise. When this function returns true, you can apply
11955 dwarf2_get_attr_constant_value to it.
11957 However, note that for some attributes you must check
11958 attr_form_is_section_offset before using this test. DW_FORM_data4
11959 and DW_FORM_data8 are members of both the constant class, and of
11960 the classes that contain offsets into other debug sections
11961 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11962 that, if an attribute's can be either a constant or one of the
11963 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11964 taken as section offsets, not constants. */
11966 attr_form_is_constant (struct attribute *attr)
11968 switch (attr->form)
11970 case DW_FORM_sdata:
11971 case DW_FORM_udata:
11972 case DW_FORM_data1:
11973 case DW_FORM_data2:
11974 case DW_FORM_data4:
11975 case DW_FORM_data8:
11983 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
11984 struct dwarf2_cu *cu)
11986 if (attr_form_is_section_offset (attr)
11987 /* ".debug_loc" may not exist at all, or the offset may be outside
11988 the section. If so, fall through to the complaint in the
11990 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
11992 struct dwarf2_loclist_baton *baton;
11994 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11995 sizeof (struct dwarf2_loclist_baton));
11996 baton->per_cu = cu->per_cu;
11997 gdb_assert (baton->per_cu);
11999 dwarf2_read_section (dwarf2_per_objfile->objfile,
12000 &dwarf2_per_objfile->loc);
12002 /* We don't know how long the location list is, but make sure we
12003 don't run off the edge of the section. */
12004 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
12005 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
12006 baton->base_address = cu->base_address;
12007 if (cu->base_known == 0)
12008 complaint (&symfile_complaints,
12009 _("Location list used without specifying the CU base address."));
12011 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
12012 SYMBOL_LOCATION_BATON (sym) = baton;
12016 struct dwarf2_locexpr_baton *baton;
12018 baton = obstack_alloc (&cu->objfile->objfile_obstack,
12019 sizeof (struct dwarf2_locexpr_baton));
12020 baton->per_cu = cu->per_cu;
12021 gdb_assert (baton->per_cu);
12023 if (attr_form_is_block (attr))
12025 /* Note that we're just copying the block's data pointer
12026 here, not the actual data. We're still pointing into the
12027 info_buffer for SYM's objfile; right now we never release
12028 that buffer, but when we do clean up properly this may
12030 baton->size = DW_BLOCK (attr)->size;
12031 baton->data = DW_BLOCK (attr)->data;
12035 dwarf2_invalid_attrib_class_complaint ("location description",
12036 SYMBOL_NATURAL_NAME (sym));
12038 baton->data = NULL;
12041 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
12042 SYMBOL_LOCATION_BATON (sym) = baton;
12046 /* Return the OBJFILE associated with the compilation unit CU. If CU
12047 came from a separate debuginfo file, then the master objfile is
12051 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
12053 struct objfile *objfile = per_cu->psymtab->objfile;
12055 /* Return the master objfile, so that we can report and look up the
12056 correct file containing this variable. */
12057 if (objfile->separate_debug_objfile_backlink)
12058 objfile = objfile->separate_debug_objfile_backlink;
12063 /* Return the address size given in the compilation unit header for CU. */
12066 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
12069 return per_cu->cu->header.addr_size;
12072 /* If the CU is not currently read in, we re-read its header. */
12073 struct objfile *objfile = per_cu->psymtab->objfile;
12074 struct dwarf2_per_objfile *per_objfile
12075 = objfile_data (objfile, dwarf2_objfile_data_key);
12076 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
12077 struct comp_unit_head cu_header;
12079 memset (&cu_header, 0, sizeof cu_header);
12080 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
12081 return cu_header.addr_size;
12085 /* Return the offset size given in the compilation unit header for CU. */
12088 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
12091 return per_cu->cu->header.offset_size;
12094 /* If the CU is not currently read in, we re-read its header. */
12095 struct objfile *objfile = per_cu->psymtab->objfile;
12096 struct dwarf2_per_objfile *per_objfile
12097 = objfile_data (objfile, dwarf2_objfile_data_key);
12098 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
12099 struct comp_unit_head cu_header;
12101 memset (&cu_header, 0, sizeof cu_header);
12102 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
12103 return cu_header.offset_size;
12107 /* Return the text offset of the CU. The returned offset comes from
12108 this CU's objfile. If this objfile came from a separate debuginfo
12109 file, then the offset may be different from the corresponding
12110 offset in the parent objfile. */
12113 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
12115 struct objfile *objfile = per_cu->psymtab->objfile;
12117 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
12120 /* Locate the .debug_info compilation unit from CU's objfile which contains
12121 the DIE at OFFSET. Raises an error on failure. */
12123 static struct dwarf2_per_cu_data *
12124 dwarf2_find_containing_comp_unit (unsigned int offset,
12125 struct objfile *objfile)
12127 struct dwarf2_per_cu_data *this_cu;
12131 high = dwarf2_per_objfile->n_comp_units - 1;
12134 int mid = low + (high - low) / 2;
12136 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
12141 gdb_assert (low == high);
12142 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
12145 error (_("Dwarf Error: could not find partial DIE containing "
12146 "offset 0x%lx [in module %s]"),
12147 (long) offset, bfd_get_filename (objfile->obfd));
12149 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
12150 return dwarf2_per_objfile->all_comp_units[low-1];
12154 this_cu = dwarf2_per_objfile->all_comp_units[low];
12155 if (low == dwarf2_per_objfile->n_comp_units - 1
12156 && offset >= this_cu->offset + this_cu->length)
12157 error (_("invalid dwarf2 offset %u"), offset);
12158 gdb_assert (offset < this_cu->offset + this_cu->length);
12163 /* Locate the compilation unit from OBJFILE which is located at exactly
12164 OFFSET. Raises an error on failure. */
12166 static struct dwarf2_per_cu_data *
12167 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
12169 struct dwarf2_per_cu_data *this_cu;
12171 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
12172 if (this_cu->offset != offset)
12173 error (_("no compilation unit with offset %u."), offset);
12177 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
12179 static struct dwarf2_cu *
12180 alloc_one_comp_unit (struct objfile *objfile)
12182 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
12183 cu->objfile = objfile;
12184 obstack_init (&cu->comp_unit_obstack);
12188 /* Release one cached compilation unit, CU. We unlink it from the tree
12189 of compilation units, but we don't remove it from the read_in_chain;
12190 the caller is responsible for that.
12191 NOTE: DATA is a void * because this function is also used as a
12192 cleanup routine. */
12195 free_one_comp_unit (void *data)
12197 struct dwarf2_cu *cu = data;
12199 if (cu->per_cu != NULL)
12200 cu->per_cu->cu = NULL;
12203 obstack_free (&cu->comp_unit_obstack, NULL);
12208 /* This cleanup function is passed the address of a dwarf2_cu on the stack
12209 when we're finished with it. We can't free the pointer itself, but be
12210 sure to unlink it from the cache. Also release any associated storage
12211 and perform cache maintenance.
12213 Only used during partial symbol parsing. */
12216 free_stack_comp_unit (void *data)
12218 struct dwarf2_cu *cu = data;
12220 obstack_free (&cu->comp_unit_obstack, NULL);
12221 cu->partial_dies = NULL;
12223 if (cu->per_cu != NULL)
12225 /* This compilation unit is on the stack in our caller, so we
12226 should not xfree it. Just unlink it. */
12227 cu->per_cu->cu = NULL;
12230 /* If we had a per-cu pointer, then we may have other compilation
12231 units loaded, so age them now. */
12232 age_cached_comp_units ();
12236 /* Free all cached compilation units. */
12239 free_cached_comp_units (void *data)
12241 struct dwarf2_per_cu_data *per_cu, **last_chain;
12243 per_cu = dwarf2_per_objfile->read_in_chain;
12244 last_chain = &dwarf2_per_objfile->read_in_chain;
12245 while (per_cu != NULL)
12247 struct dwarf2_per_cu_data *next_cu;
12249 next_cu = per_cu->cu->read_in_chain;
12251 free_one_comp_unit (per_cu->cu);
12252 *last_chain = next_cu;
12258 /* Increase the age counter on each cached compilation unit, and free
12259 any that are too old. */
12262 age_cached_comp_units (void)
12264 struct dwarf2_per_cu_data *per_cu, **last_chain;
12266 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
12267 per_cu = dwarf2_per_objfile->read_in_chain;
12268 while (per_cu != NULL)
12270 per_cu->cu->last_used ++;
12271 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
12272 dwarf2_mark (per_cu->cu);
12273 per_cu = per_cu->cu->read_in_chain;
12276 per_cu = dwarf2_per_objfile->read_in_chain;
12277 last_chain = &dwarf2_per_objfile->read_in_chain;
12278 while (per_cu != NULL)
12280 struct dwarf2_per_cu_data *next_cu;
12282 next_cu = per_cu->cu->read_in_chain;
12284 if (!per_cu->cu->mark)
12286 free_one_comp_unit (per_cu->cu);
12287 *last_chain = next_cu;
12290 last_chain = &per_cu->cu->read_in_chain;
12296 /* Remove a single compilation unit from the cache. */
12299 free_one_cached_comp_unit (void *target_cu)
12301 struct dwarf2_per_cu_data *per_cu, **last_chain;
12303 per_cu = dwarf2_per_objfile->read_in_chain;
12304 last_chain = &dwarf2_per_objfile->read_in_chain;
12305 while (per_cu != NULL)
12307 struct dwarf2_per_cu_data *next_cu;
12309 next_cu = per_cu->cu->read_in_chain;
12311 if (per_cu->cu == target_cu)
12313 free_one_comp_unit (per_cu->cu);
12314 *last_chain = next_cu;
12318 last_chain = &per_cu->cu->read_in_chain;
12324 /* Release all extra memory associated with OBJFILE. */
12327 dwarf2_free_objfile (struct objfile *objfile)
12329 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
12331 if (dwarf2_per_objfile == NULL)
12334 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
12335 free_cached_comp_units (NULL);
12337 /* Everything else should be on the objfile obstack. */
12340 /* A pair of DIE offset and GDB type pointer. We store these
12341 in a hash table separate from the DIEs, and preserve them
12342 when the DIEs are flushed out of cache. */
12344 struct dwarf2_offset_and_type
12346 unsigned int offset;
12350 /* Hash function for a dwarf2_offset_and_type. */
12353 offset_and_type_hash (const void *item)
12355 const struct dwarf2_offset_and_type *ofs = item;
12357 return ofs->offset;
12360 /* Equality function for a dwarf2_offset_and_type. */
12363 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
12365 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
12366 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
12368 return ofs_lhs->offset == ofs_rhs->offset;
12371 /* Set the type associated with DIE to TYPE. Save it in CU's hash
12372 table if necessary. For convenience, return TYPE.
12374 The DIEs reading must have careful ordering to:
12375 * Not cause infite loops trying to read in DIEs as a prerequisite for
12376 reading current DIE.
12377 * Not trying to dereference contents of still incompletely read in types
12378 while reading in other DIEs.
12379 * Enable referencing still incompletely read in types just by a pointer to
12380 the type without accessing its fields.
12382 Therefore caller should follow these rules:
12383 * Try to fetch any prerequisite types we may need to build this DIE type
12384 before building the type and calling set_die_type.
12385 * After building typer call set_die_type for current DIE as soon as
12386 possible before fetching more types to complete the current type.
12387 * Make the type as complete as possible before fetching more types. */
12389 static struct type *
12390 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
12392 struct dwarf2_offset_and_type **slot, ofs;
12394 /* For Ada types, make sure that the gnat-specific data is always
12395 initialized (if not already set). There are a few types where
12396 we should not be doing so, because the type-specific area is
12397 already used to hold some other piece of info (eg: TYPE_CODE_FLT
12398 where the type-specific area is used to store the floatformat).
12399 But this is not a problem, because the gnat-specific information
12400 is actually not needed for these types. */
12401 if (need_gnat_info (cu)
12402 && TYPE_CODE (type) != TYPE_CODE_FUNC
12403 && TYPE_CODE (type) != TYPE_CODE_FLT
12404 && !HAVE_GNAT_AUX_INFO (type))
12405 INIT_GNAT_SPECIFIC (type);
12407 if (cu->type_hash == NULL)
12409 gdb_assert (cu->per_cu != NULL);
12410 cu->per_cu->type_hash
12411 = htab_create_alloc_ex (cu->header.length / 24,
12412 offset_and_type_hash,
12413 offset_and_type_eq,
12415 &cu->objfile->objfile_obstack,
12416 hashtab_obstack_allocate,
12417 dummy_obstack_deallocate);
12418 cu->type_hash = cu->per_cu->type_hash;
12421 ofs.offset = die->offset;
12423 slot = (struct dwarf2_offset_and_type **)
12424 htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
12426 complaint (&symfile_complaints,
12427 _("A problem internal to GDB: DIE 0x%x has type already set"),
12429 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
12434 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
12435 not have a saved type. */
12437 static struct type *
12438 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
12440 struct dwarf2_offset_and_type *slot, ofs;
12441 htab_t type_hash = cu->type_hash;
12443 if (type_hash == NULL)
12446 ofs.offset = die->offset;
12447 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
12454 /* Add a dependence relationship from CU to REF_PER_CU. */
12457 dwarf2_add_dependence (struct dwarf2_cu *cu,
12458 struct dwarf2_per_cu_data *ref_per_cu)
12462 if (cu->dependencies == NULL)
12464 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
12465 NULL, &cu->comp_unit_obstack,
12466 hashtab_obstack_allocate,
12467 dummy_obstack_deallocate);
12469 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
12471 *slot = ref_per_cu;
12474 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12475 Set the mark field in every compilation unit in the
12476 cache that we must keep because we are keeping CU. */
12479 dwarf2_mark_helper (void **slot, void *data)
12481 struct dwarf2_per_cu_data *per_cu;
12483 per_cu = (struct dwarf2_per_cu_data *) *slot;
12484 if (per_cu->cu->mark)
12486 per_cu->cu->mark = 1;
12488 if (per_cu->cu->dependencies != NULL)
12489 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
12494 /* Set the mark field in CU and in every other compilation unit in the
12495 cache that we must keep because we are keeping CU. */
12498 dwarf2_mark (struct dwarf2_cu *cu)
12503 if (cu->dependencies != NULL)
12504 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
12508 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
12512 per_cu->cu->mark = 0;
12513 per_cu = per_cu->cu->read_in_chain;
12517 /* Trivial hash function for partial_die_info: the hash value of a DIE
12518 is its offset in .debug_info for this objfile. */
12521 partial_die_hash (const void *item)
12523 const struct partial_die_info *part_die = item;
12525 return part_die->offset;
12528 /* Trivial comparison function for partial_die_info structures: two DIEs
12529 are equal if they have the same offset. */
12532 partial_die_eq (const void *item_lhs, const void *item_rhs)
12534 const struct partial_die_info *part_die_lhs = item_lhs;
12535 const struct partial_die_info *part_die_rhs = item_rhs;
12537 return part_die_lhs->offset == part_die_rhs->offset;
12540 static struct cmd_list_element *set_dwarf2_cmdlist;
12541 static struct cmd_list_element *show_dwarf2_cmdlist;
12544 set_dwarf2_cmd (char *args, int from_tty)
12546 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
12550 show_dwarf2_cmd (char *args, int from_tty)
12552 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
12555 /* If section described by INFO was mmapped, munmap it now. */
12558 munmap_section_buffer (struct dwarf2_section_info *info)
12560 if (info->was_mmapped)
12563 intptr_t begin = (intptr_t) info->buffer;
12564 intptr_t map_begin = begin & ~(pagesize - 1);
12565 size_t map_length = info->size + begin - map_begin;
12567 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
12569 /* Without HAVE_MMAP, we should never be here to begin with. */
12575 /* munmap debug sections for OBJFILE, if necessary. */
12578 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
12580 struct dwarf2_per_objfile *data = d;
12582 /* This is sorted according to the order they're defined in to make it easier
12583 to keep in sync. */
12584 munmap_section_buffer (&data->info);
12585 munmap_section_buffer (&data->abbrev);
12586 munmap_section_buffer (&data->line);
12587 munmap_section_buffer (&data->loc);
12588 munmap_section_buffer (&data->macinfo);
12589 munmap_section_buffer (&data->str);
12590 munmap_section_buffer (&data->ranges);
12591 munmap_section_buffer (&data->types);
12592 munmap_section_buffer (&data->frame);
12593 munmap_section_buffer (&data->eh_frame);
12596 int dwarf2_always_disassemble;
12599 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
12600 struct cmd_list_element *c, const char *value)
12602 fprintf_filtered (file, _("\
12603 Whether to always disassemble DWARF expressions is %s.\n"),
12607 void _initialize_dwarf2_read (void);
12610 _initialize_dwarf2_read (void)
12612 dwarf2_objfile_data_key
12613 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
12615 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
12616 Set DWARF 2 specific variables.\n\
12617 Configure DWARF 2 variables such as the cache size"),
12618 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
12619 0/*allow-unknown*/, &maintenance_set_cmdlist);
12621 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
12622 Show DWARF 2 specific variables\n\
12623 Show DWARF 2 variables such as the cache size"),
12624 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
12625 0/*allow-unknown*/, &maintenance_show_cmdlist);
12627 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
12628 &dwarf2_max_cache_age, _("\
12629 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12630 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12631 A higher limit means that cached compilation units will be stored\n\
12632 in memory longer, and more total memory will be used. Zero disables\n\
12633 caching, which can slow down startup."),
12635 show_dwarf2_max_cache_age,
12636 &set_dwarf2_cmdlist,
12637 &show_dwarf2_cmdlist);
12639 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
12640 &dwarf2_always_disassemble, _("\
12641 Set whether `info address' always disassembles DWARF expressions."), _("\
12642 Show whether `info address' always disassembles DWARF expressions."), _("\
12643 When enabled, DWARF expressions are always printed in an assembly-like\n\
12644 syntax. When disabled, expressions will be printed in a more\n\
12645 conversational style, when possible."),
12647 show_dwarf2_always_disassemble,
12648 &set_dwarf2_cmdlist,
12649 &show_dwarf2_cmdlist);
12651 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
12652 Set debugging of the dwarf2 DIE reader."), _("\
12653 Show debugging of the dwarf2 DIE reader."), _("\
12654 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12655 The value is the maximum depth to print."),
12658 &setdebuglist, &showdebuglist);