1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
56 #include "gdb_string.h"
57 #include "gdb_assert.h"
58 #include <sys/types.h>
65 #define MAP_FAILED ((void *) -1)
70 /* .debug_info header for a compilation unit
71 Because of alignment constraints, this structure has padding and cannot
72 be mapped directly onto the beginning of the .debug_info section. */
73 typedef struct comp_unit_header
75 unsigned int length; /* length of the .debug_info
77 unsigned short version; /* version number -- 2 for DWARF
79 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
80 unsigned char addr_size; /* byte size of an address -- 4 */
83 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
86 /* .debug_line statement program prologue
87 Because of alignment constraints, this structure has padding and cannot
88 be mapped directly onto the beginning of the .debug_info section. */
89 typedef struct statement_prologue
91 unsigned int total_length; /* byte length of the statement
93 unsigned short version; /* version number -- 2 for DWARF
95 unsigned int prologue_length; /* # bytes between prologue &
97 unsigned char minimum_instruction_length; /* byte size of
99 unsigned char default_is_stmt; /* initial value of is_stmt
102 unsigned char line_range;
103 unsigned char opcode_base; /* number assigned to first special
105 unsigned char *standard_opcode_lengths;
109 /* When non-zero, dump DIEs after they are read in. */
110 static int dwarf2_die_debug = 0;
114 /* When set, the file that we're processing is known to have debugging
115 info for C++ namespaces. GCC 3.3.x did not produce this information,
116 but later versions do. */
118 static int processing_has_namespace_info;
120 static const struct objfile_data *dwarf2_objfile_data_key;
122 struct dwarf2_section_info
128 /* True if we have tried to read this section. */
132 struct dwarf2_per_objfile
134 struct dwarf2_section_info info;
135 struct dwarf2_section_info abbrev;
136 struct dwarf2_section_info line;
137 struct dwarf2_section_info loc;
138 struct dwarf2_section_info macinfo;
139 struct dwarf2_section_info str;
140 struct dwarf2_section_info ranges;
141 struct dwarf2_section_info types;
142 struct dwarf2_section_info frame;
143 struct dwarf2_section_info eh_frame;
146 struct objfile *objfile;
148 /* A list of all the compilation units. This is used to locate
149 the target compilation unit of a particular reference. */
150 struct dwarf2_per_cu_data **all_comp_units;
152 /* The number of compilation units in ALL_COMP_UNITS. */
155 /* A chain of compilation units that are currently read in, so that
156 they can be freed later. */
157 struct dwarf2_per_cu_data *read_in_chain;
159 /* A table mapping .debug_types signatures to its signatured_type entry.
160 This is NULL if the .debug_types section hasn't been read in yet. */
161 htab_t signatured_types;
163 /* A flag indicating wether this objfile has a section loaded at a
165 int has_section_at_zero;
168 static struct dwarf2_per_objfile *dwarf2_per_objfile;
170 /* names of the debugging sections */
172 /* Note that if the debugging section has been compressed, it might
173 have a name like .zdebug_info. */
175 #define INFO_SECTION "debug_info"
176 #define ABBREV_SECTION "debug_abbrev"
177 #define LINE_SECTION "debug_line"
178 #define LOC_SECTION "debug_loc"
179 #define MACINFO_SECTION "debug_macinfo"
180 #define STR_SECTION "debug_str"
181 #define RANGES_SECTION "debug_ranges"
182 #define TYPES_SECTION "debug_types"
183 #define FRAME_SECTION "debug_frame"
184 #define EH_FRAME_SECTION "eh_frame"
186 /* local data types */
188 /* We hold several abbreviation tables in memory at the same time. */
189 #ifndef ABBREV_HASH_SIZE
190 #define ABBREV_HASH_SIZE 121
193 /* The data in a compilation unit header, after target2host
194 translation, looks like this. */
195 struct comp_unit_head
199 unsigned char addr_size;
200 unsigned char signed_addr_p;
201 unsigned int abbrev_offset;
203 /* Size of file offsets; either 4 or 8. */
204 unsigned int offset_size;
206 /* Size of the length field; either 4 or 12. */
207 unsigned int initial_length_size;
209 /* Offset to the first byte of this compilation unit header in the
210 .debug_info section, for resolving relative reference dies. */
213 /* Offset to first die in this cu from the start of the cu.
214 This will be the first byte following the compilation unit header. */
215 unsigned int first_die_offset;
218 /* Internal state when decoding a particular compilation unit. */
221 /* The objfile containing this compilation unit. */
222 struct objfile *objfile;
224 /* The header of the compilation unit. */
225 struct comp_unit_head header;
227 /* Base address of this compilation unit. */
228 CORE_ADDR base_address;
230 /* Non-zero if base_address has been set. */
233 struct function_range *first_fn, *last_fn, *cached_fn;
235 /* The language we are debugging. */
236 enum language language;
237 const struct language_defn *language_defn;
239 const char *producer;
241 /* The generic symbol table building routines have separate lists for
242 file scope symbols and all all other scopes (local scopes). So
243 we need to select the right one to pass to add_symbol_to_list().
244 We do it by keeping a pointer to the correct list in list_in_scope.
246 FIXME: The original dwarf code just treated the file scope as the
247 first local scope, and all other local scopes as nested local
248 scopes, and worked fine. Check to see if we really need to
249 distinguish these in buildsym.c. */
250 struct pending **list_in_scope;
252 /* DWARF abbreviation table associated with this compilation unit. */
253 struct abbrev_info **dwarf2_abbrevs;
255 /* Storage for the abbrev table. */
256 struct obstack abbrev_obstack;
258 /* Hash table holding all the loaded partial DIEs. */
261 /* Storage for things with the same lifetime as this read-in compilation
262 unit, including partial DIEs. */
263 struct obstack comp_unit_obstack;
265 /* When multiple dwarf2_cu structures are living in memory, this field
266 chains them all together, so that they can be released efficiently.
267 We will probably also want a generation counter so that most-recently-used
268 compilation units are cached... */
269 struct dwarf2_per_cu_data *read_in_chain;
271 /* Backchain to our per_cu entry if the tree has been built. */
272 struct dwarf2_per_cu_data *per_cu;
274 /* Pointer to the die -> type map. Although it is stored
275 permanently in per_cu, we copy it here to avoid double
279 /* How many compilation units ago was this CU last referenced? */
282 /* A hash table of die offsets for following references. */
285 /* Full DIEs if read in. */
286 struct die_info *dies;
288 /* A set of pointers to dwarf2_per_cu_data objects for compilation
289 units referenced by this one. Only set during full symbol processing;
290 partial symbol tables do not have dependencies. */
293 /* Header data from the line table, during full symbol processing. */
294 struct line_header *line_header;
296 /* Mark used when releasing cached dies. */
297 unsigned int mark : 1;
299 /* This flag will be set if this compilation unit might include
300 inter-compilation-unit references. */
301 unsigned int has_form_ref_addr : 1;
303 /* This flag will be set if this compilation unit includes any
304 DW_TAG_namespace DIEs. If we know that there are explicit
305 DIEs for namespaces, we don't need to try to infer them
306 from mangled names. */
307 unsigned int has_namespace_info : 1;
310 /* Persistent data held for a compilation unit, even when not
311 processing it. We put a pointer to this structure in the
312 read_symtab_private field of the psymtab. If we encounter
313 inter-compilation-unit references, we also maintain a sorted
314 list of all compilation units. */
316 struct dwarf2_per_cu_data
318 /* The start offset and length of this compilation unit. 2**29-1
319 bytes should suffice to store the length of any compilation unit
320 - if it doesn't, GDB will fall over anyway.
321 NOTE: Unlike comp_unit_head.length, this length includes
322 initial_length_size. */
324 unsigned int length : 29;
326 /* Flag indicating this compilation unit will be read in before
327 any of the current compilation units are processed. */
328 unsigned int queued : 1;
330 /* This flag will be set if we need to load absolutely all DIEs
331 for this compilation unit, instead of just the ones we think
332 are interesting. It gets set if we look for a DIE in the
333 hash table and don't find it. */
334 unsigned int load_all_dies : 1;
336 /* Non-zero if this CU is from .debug_types.
337 Otherwise it's from .debug_info. */
338 unsigned int from_debug_types : 1;
340 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
341 of the CU cache it gets reset to NULL again. */
342 struct dwarf2_cu *cu;
344 /* If full symbols for this CU have been read in, then this field
345 holds a map of DIE offsets to types. It isn't always possible
346 to reconstruct this information later, so we have to preserve
350 /* The partial symbol table associated with this compilation unit,
351 or NULL for partial units (which do not have an associated
353 struct partial_symtab *psymtab;
356 /* Entry in the signatured_types hash table. */
358 struct signatured_type
362 /* Offset in .debug_types of the TU (type_unit) for this type. */
365 /* Offset in .debug_types of the type defined by this TU. */
366 unsigned int type_offset;
368 /* The CU(/TU) of this type. */
369 struct dwarf2_per_cu_data per_cu;
372 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
373 which are used for both .debug_info and .debug_types dies.
374 All parameters here are unchanging for the life of the call.
375 This struct exists to abstract away the constant parameters of
378 struct die_reader_specs
380 /* The bfd of this objfile. */
383 /* The CU of the DIE we are parsing. */
384 struct dwarf2_cu *cu;
386 /* Pointer to start of section buffer.
387 This is either the start of .debug_info or .debug_types. */
388 const gdb_byte *buffer;
391 /* The line number information for a compilation unit (found in the
392 .debug_line section) begins with a "statement program header",
393 which contains the following information. */
396 unsigned int total_length;
397 unsigned short version;
398 unsigned int header_length;
399 unsigned char minimum_instruction_length;
400 unsigned char maximum_ops_per_instruction;
401 unsigned char default_is_stmt;
403 unsigned char line_range;
404 unsigned char opcode_base;
406 /* standard_opcode_lengths[i] is the number of operands for the
407 standard opcode whose value is i. This means that
408 standard_opcode_lengths[0] is unused, and the last meaningful
409 element is standard_opcode_lengths[opcode_base - 1]. */
410 unsigned char *standard_opcode_lengths;
412 /* The include_directories table. NOTE! These strings are not
413 allocated with xmalloc; instead, they are pointers into
414 debug_line_buffer. If you try to free them, `free' will get
416 unsigned int num_include_dirs, include_dirs_size;
419 /* The file_names table. NOTE! These strings are not allocated
420 with xmalloc; instead, they are pointers into debug_line_buffer.
421 Don't try to free them directly. */
422 unsigned int num_file_names, file_names_size;
426 unsigned int dir_index;
427 unsigned int mod_time;
429 int included_p; /* Non-zero if referenced by the Line Number Program. */
430 struct symtab *symtab; /* The associated symbol table, if any. */
433 /* The start and end of the statement program following this
434 header. These point into dwarf2_per_objfile->line_buffer. */
435 gdb_byte *statement_program_start, *statement_program_end;
438 /* When we construct a partial symbol table entry we only
439 need this much information. */
440 struct partial_die_info
442 /* Offset of this DIE. */
445 /* DWARF-2 tag for this DIE. */
446 ENUM_BITFIELD(dwarf_tag) tag : 16;
448 /* Assorted flags describing the data found in this DIE. */
449 unsigned int has_children : 1;
450 unsigned int is_external : 1;
451 unsigned int is_declaration : 1;
452 unsigned int has_type : 1;
453 unsigned int has_specification : 1;
454 unsigned int has_pc_info : 1;
456 /* Flag set if the SCOPE field of this structure has been
458 unsigned int scope_set : 1;
460 /* Flag set if the DIE has a byte_size attribute. */
461 unsigned int has_byte_size : 1;
463 /* The name of this DIE. Normally the value of DW_AT_name, but
464 sometimes a default name for unnamed DIEs. */
467 /* The scope to prepend to our children. This is generally
468 allocated on the comp_unit_obstack, so will disappear
469 when this compilation unit leaves the cache. */
472 /* The location description associated with this DIE, if any. */
473 struct dwarf_block *locdesc;
475 /* If HAS_PC_INFO, the PC range associated with this DIE. */
479 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
480 DW_AT_sibling, if any. */
483 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
484 DW_AT_specification (or DW_AT_abstract_origin or
486 unsigned int spec_offset;
488 /* Pointers to this DIE's parent, first child, and next sibling,
490 struct partial_die_info *die_parent, *die_child, *die_sibling;
493 /* This data structure holds the information of an abbrev. */
496 unsigned int number; /* number identifying abbrev */
497 enum dwarf_tag tag; /* dwarf tag */
498 unsigned short has_children; /* boolean */
499 unsigned short num_attrs; /* number of attributes */
500 struct attr_abbrev *attrs; /* an array of attribute descriptions */
501 struct abbrev_info *next; /* next in chain */
506 ENUM_BITFIELD(dwarf_attribute) name : 16;
507 ENUM_BITFIELD(dwarf_form) form : 16;
510 /* Attributes have a name and a value */
513 ENUM_BITFIELD(dwarf_attribute) name : 16;
514 ENUM_BITFIELD(dwarf_form) form : 15;
516 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
517 field should be in u.str (existing only for DW_STRING) but it is kept
518 here for better struct attribute alignment. */
519 unsigned int string_is_canonical : 1;
524 struct dwarf_block *blk;
528 struct signatured_type *signatured_type;
533 /* This data structure holds a complete die structure. */
536 /* DWARF-2 tag for this DIE. */
537 ENUM_BITFIELD(dwarf_tag) tag : 16;
539 /* Number of attributes */
540 unsigned short num_attrs;
545 /* Offset in .debug_info or .debug_types section. */
548 /* The dies in a compilation unit form an n-ary tree. PARENT
549 points to this die's parent; CHILD points to the first child of
550 this node; and all the children of a given node are chained
551 together via their SIBLING fields, terminated by a die whose
553 struct die_info *child; /* Its first child, if any. */
554 struct die_info *sibling; /* Its next sibling, if any. */
555 struct die_info *parent; /* Its parent, if any. */
557 /* An array of attributes, with NUM_ATTRS elements. There may be
558 zero, but it's not common and zero-sized arrays are not
559 sufficiently portable C. */
560 struct attribute attrs[1];
563 struct function_range
566 CORE_ADDR lowpc, highpc;
568 struct function_range *next;
571 /* Get at parts of an attribute structure */
573 #define DW_STRING(attr) ((attr)->u.str)
574 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
575 #define DW_UNSND(attr) ((attr)->u.unsnd)
576 #define DW_BLOCK(attr) ((attr)->u.blk)
577 #define DW_SND(attr) ((attr)->u.snd)
578 #define DW_ADDR(attr) ((attr)->u.addr)
579 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
581 /* Blocks are a bunch of untyped bytes. */
588 #ifndef ATTR_ALLOC_CHUNK
589 #define ATTR_ALLOC_CHUNK 4
592 /* Allocate fields for structs, unions and enums in this size. */
593 #ifndef DW_FIELD_ALLOC_CHUNK
594 #define DW_FIELD_ALLOC_CHUNK 4
597 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
598 but this would require a corresponding change in unpack_field_as_long
600 static int bits_per_byte = 8;
602 /* The routines that read and process dies for a C struct or C++ class
603 pass lists of data member fields and lists of member function fields
604 in an instance of a field_info structure, as defined below. */
607 /* List of data member and baseclasses fields. */
610 struct nextfield *next;
615 *fields, *baseclasses;
617 /* Number of fields (including baseclasses). */
620 /* Number of baseclasses. */
623 /* Set if the accesibility of one of the fields is not public. */
624 int non_public_fields;
626 /* Member function fields array, entries are allocated in the order they
627 are encountered in the object file. */
630 struct nextfnfield *next;
631 struct fn_field fnfield;
635 /* Member function fieldlist array, contains name of possibly overloaded
636 member function, number of overloaded member functions and a pointer
637 to the head of the member function field chain. */
642 struct nextfnfield *head;
646 /* Number of entries in the fnfieldlists array. */
649 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
650 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
651 struct typedef_field_list
653 struct typedef_field field;
654 struct typedef_field_list *next;
657 unsigned typedef_field_list_count;
660 /* One item on the queue of compilation units to read in full symbols
662 struct dwarf2_queue_item
664 struct dwarf2_per_cu_data *per_cu;
665 struct dwarf2_queue_item *next;
668 /* The current queue. */
669 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
671 /* Loaded secondary compilation units are kept in memory until they
672 have not been referenced for the processing of this many
673 compilation units. Set this to zero to disable caching. Cache
674 sizes of up to at least twenty will improve startup time for
675 typical inter-CU-reference binaries, at an obvious memory cost. */
676 static int dwarf2_max_cache_age = 5;
678 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
679 struct cmd_list_element *c, const char *value)
681 fprintf_filtered (file, _("\
682 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
687 /* Various complaints about symbol reading that don't abort the process */
690 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
692 complaint (&symfile_complaints,
693 _("statement list doesn't fit in .debug_line section"));
697 dwarf2_debug_line_missing_file_complaint (void)
699 complaint (&symfile_complaints,
700 _(".debug_line section has line data without a file"));
704 dwarf2_debug_line_missing_end_sequence_complaint (void)
706 complaint (&symfile_complaints,
707 _(".debug_line section has line program sequence without an end"));
711 dwarf2_complex_location_expr_complaint (void)
713 complaint (&symfile_complaints, _("location expression too complex"));
717 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
720 complaint (&symfile_complaints,
721 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
726 dwarf2_macros_too_long_complaint (void)
728 complaint (&symfile_complaints,
729 _("macro info runs off end of `.debug_macinfo' section"));
733 dwarf2_macro_malformed_definition_complaint (const char *arg1)
735 complaint (&symfile_complaints,
736 _("macro debug info contains a malformed macro definition:\n`%s'"),
741 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
743 complaint (&symfile_complaints,
744 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
747 /* local function prototypes */
749 static void dwarf2_locate_sections (bfd *, asection *, void *);
751 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
754 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
756 struct partial_symtab *);
758 static void dwarf2_build_psymtabs_hard (struct objfile *);
760 static void scan_partial_symbols (struct partial_die_info *,
761 CORE_ADDR *, CORE_ADDR *,
762 int, struct dwarf2_cu *);
764 static void add_partial_symbol (struct partial_die_info *,
767 static void add_partial_namespace (struct partial_die_info *pdi,
768 CORE_ADDR *lowpc, CORE_ADDR *highpc,
769 int need_pc, struct dwarf2_cu *cu);
771 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
772 CORE_ADDR *highpc, int need_pc,
773 struct dwarf2_cu *cu);
775 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
776 struct dwarf2_cu *cu);
778 static void add_partial_subprogram (struct partial_die_info *pdi,
779 CORE_ADDR *lowpc, CORE_ADDR *highpc,
780 int need_pc, struct dwarf2_cu *cu);
782 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
783 gdb_byte *buffer, gdb_byte *info_ptr,
784 bfd *abfd, struct dwarf2_cu *cu);
786 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
788 static void psymtab_to_symtab_1 (struct partial_symtab *);
790 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
792 static void dwarf2_free_abbrev_table (void *);
794 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
797 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
800 static struct partial_die_info *load_partial_dies (bfd *,
801 gdb_byte *, gdb_byte *,
802 int, struct dwarf2_cu *);
804 static gdb_byte *read_partial_die (struct partial_die_info *,
805 struct abbrev_info *abbrev,
807 gdb_byte *, gdb_byte *,
810 static struct partial_die_info *find_partial_die (unsigned int,
813 static void fixup_partial_die (struct partial_die_info *,
816 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
817 bfd *, gdb_byte *, struct dwarf2_cu *);
819 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
820 bfd *, gdb_byte *, struct dwarf2_cu *);
822 static unsigned int read_1_byte (bfd *, gdb_byte *);
824 static int read_1_signed_byte (bfd *, gdb_byte *);
826 static unsigned int read_2_bytes (bfd *, gdb_byte *);
828 static unsigned int read_4_bytes (bfd *, gdb_byte *);
830 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
832 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
835 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
837 static LONGEST read_checked_initial_length_and_offset
838 (bfd *, gdb_byte *, const struct comp_unit_head *,
839 unsigned int *, unsigned int *);
841 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
844 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
846 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
848 static char *read_string (bfd *, gdb_byte *, unsigned int *);
850 static char *read_indirect_string (bfd *, gdb_byte *,
851 const struct comp_unit_head *,
854 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
856 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
858 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
860 static void set_cu_language (unsigned int, struct dwarf2_cu *);
862 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
865 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
869 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
870 struct dwarf2_cu *cu);
872 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
874 static struct die_info *die_specification (struct die_info *die,
875 struct dwarf2_cu **);
877 static void free_line_header (struct line_header *lh);
879 static void add_file_name (struct line_header *, char *, unsigned int,
880 unsigned int, unsigned int);
882 static struct line_header *(dwarf_decode_line_header
883 (unsigned int offset,
884 bfd *abfd, struct dwarf2_cu *cu));
886 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
887 struct dwarf2_cu *, struct partial_symtab *);
889 static void dwarf2_start_subfile (char *, char *, char *);
891 static struct symbol *new_symbol (struct die_info *, struct type *,
894 static void dwarf2_const_value (struct attribute *, struct symbol *,
897 static void dwarf2_const_value_data (struct attribute *attr,
901 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
903 static int need_gnat_info (struct dwarf2_cu *);
905 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
907 static void set_descriptive_type (struct type *, struct die_info *,
910 static struct type *die_containing_type (struct die_info *,
913 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
915 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
917 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
919 static char *typename_concat (struct obstack *obs, const char *prefix,
920 const char *suffix, int physname,
921 struct dwarf2_cu *cu);
923 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
925 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
927 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
929 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
931 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
932 struct dwarf2_cu *, struct partial_symtab *);
934 static int dwarf2_get_pc_bounds (struct die_info *,
935 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
936 struct partial_symtab *);
938 static void get_scope_pc_bounds (struct die_info *,
939 CORE_ADDR *, CORE_ADDR *,
942 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
943 CORE_ADDR, struct dwarf2_cu *);
945 static void dwarf2_add_field (struct field_info *, struct die_info *,
948 static void dwarf2_attach_fields_to_type (struct field_info *,
949 struct type *, struct dwarf2_cu *);
951 static void dwarf2_add_member_fn (struct field_info *,
952 struct die_info *, struct type *,
955 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
956 struct type *, struct dwarf2_cu *);
958 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
960 static void read_common_block (struct die_info *, struct dwarf2_cu *);
962 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
964 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
966 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
968 static struct type *read_module_type (struct die_info *die,
969 struct dwarf2_cu *cu);
971 static const char *namespace_name (struct die_info *die,
972 int *is_anonymous, struct dwarf2_cu *);
974 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
976 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
978 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
981 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
983 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
985 gdb_byte **new_info_ptr,
986 struct die_info *parent);
988 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
990 gdb_byte **new_info_ptr,
991 struct die_info *parent);
993 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
995 gdb_byte **new_info_ptr,
996 struct die_info *parent);
998 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
999 struct die_info **, gdb_byte *,
1002 static void process_die (struct die_info *, struct dwarf2_cu *);
1004 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1007 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1009 static struct die_info *dwarf2_extension (struct die_info *die,
1010 struct dwarf2_cu **);
1012 static char *dwarf_tag_name (unsigned int);
1014 static char *dwarf_attr_name (unsigned int);
1016 static char *dwarf_form_name (unsigned int);
1018 static char *dwarf_bool_name (unsigned int);
1020 static char *dwarf_type_encoding_name (unsigned int);
1023 static char *dwarf_cfi_name (unsigned int);
1026 static struct die_info *sibling_die (struct die_info *);
1028 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1030 static void dump_die_for_error (struct die_info *);
1032 static void dump_die_1 (struct ui_file *, int level, int max_level,
1035 /*static*/ void dump_die (struct die_info *, int max_level);
1037 static void store_in_ref_table (struct die_info *,
1038 struct dwarf2_cu *);
1040 static int is_ref_attr (struct attribute *);
1042 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1044 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1046 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1048 struct dwarf2_cu **);
1050 static struct die_info *follow_die_ref (struct die_info *,
1052 struct dwarf2_cu **);
1054 static struct die_info *follow_die_sig (struct die_info *,
1056 struct dwarf2_cu **);
1058 static void read_signatured_type_at_offset (struct objfile *objfile,
1059 unsigned int offset);
1061 static void read_signatured_type (struct objfile *,
1062 struct signatured_type *type_sig);
1064 /* memory allocation interface */
1066 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1068 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1070 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1072 static void initialize_cu_func_list (struct dwarf2_cu *);
1074 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1075 struct dwarf2_cu *);
1077 static void dwarf_decode_macros (struct line_header *, unsigned int,
1078 char *, bfd *, struct dwarf2_cu *);
1080 static int attr_form_is_block (struct attribute *);
1082 static int attr_form_is_section_offset (struct attribute *);
1084 static int attr_form_is_constant (struct attribute *);
1086 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1088 struct dwarf2_cu *cu);
1090 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1091 struct abbrev_info *abbrev,
1092 struct dwarf2_cu *cu);
1094 static void free_stack_comp_unit (void *);
1096 static hashval_t partial_die_hash (const void *item);
1098 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1100 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1101 (unsigned int offset, struct objfile *objfile);
1103 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1104 (unsigned int offset, struct objfile *objfile);
1106 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1108 static void free_one_comp_unit (void *);
1110 static void free_cached_comp_units (void *);
1112 static void age_cached_comp_units (void);
1114 static void free_one_cached_comp_unit (void *);
1116 static struct type *set_die_type (struct die_info *, struct type *,
1117 struct dwarf2_cu *);
1119 static void create_all_comp_units (struct objfile *);
1121 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1124 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1126 static void dwarf2_add_dependence (struct dwarf2_cu *,
1127 struct dwarf2_per_cu_data *);
1129 static void dwarf2_mark (struct dwarf2_cu *);
1131 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1133 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1135 /* Try to locate the sections we need for DWARF 2 debugging
1136 information and return true if we have enough to do something. */
1139 dwarf2_has_info (struct objfile *objfile)
1141 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1142 if (!dwarf2_per_objfile)
1144 /* Initialize per-objfile state. */
1145 struct dwarf2_per_objfile *data
1146 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1148 memset (data, 0, sizeof (*data));
1149 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1150 dwarf2_per_objfile = data;
1152 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1153 dwarf2_per_objfile->objfile = objfile;
1155 return (dwarf2_per_objfile->info.asection != NULL
1156 && dwarf2_per_objfile->abbrev.asection != NULL);
1159 /* When loading sections, we can either look for ".<name>", or for
1160 * ".z<name>", which indicates a compressed section. */
1163 section_is_p (const char *section_name, const char *name)
1165 return (section_name[0] == '.'
1166 && (strcmp (section_name + 1, name) == 0
1167 || (section_name[1] == 'z'
1168 && strcmp (section_name + 2, name) == 0)));
1171 /* This function is mapped across the sections and remembers the
1172 offset and size of each of the debugging sections we are interested
1176 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1178 if (section_is_p (sectp->name, INFO_SECTION))
1180 dwarf2_per_objfile->info.asection = sectp;
1181 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1183 else if (section_is_p (sectp->name, ABBREV_SECTION))
1185 dwarf2_per_objfile->abbrev.asection = sectp;
1186 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1188 else if (section_is_p (sectp->name, LINE_SECTION))
1190 dwarf2_per_objfile->line.asection = sectp;
1191 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1193 else if (section_is_p (sectp->name, LOC_SECTION))
1195 dwarf2_per_objfile->loc.asection = sectp;
1196 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1198 else if (section_is_p (sectp->name, MACINFO_SECTION))
1200 dwarf2_per_objfile->macinfo.asection = sectp;
1201 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1203 else if (section_is_p (sectp->name, STR_SECTION))
1205 dwarf2_per_objfile->str.asection = sectp;
1206 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1208 else if (section_is_p (sectp->name, FRAME_SECTION))
1210 dwarf2_per_objfile->frame.asection = sectp;
1211 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1213 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1215 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1217 if (aflag & SEC_HAS_CONTENTS)
1219 dwarf2_per_objfile->eh_frame.asection = sectp;
1220 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1223 else if (section_is_p (sectp->name, RANGES_SECTION))
1225 dwarf2_per_objfile->ranges.asection = sectp;
1226 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1228 else if (section_is_p (sectp->name, TYPES_SECTION))
1230 dwarf2_per_objfile->types.asection = sectp;
1231 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1234 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1235 && bfd_section_vma (abfd, sectp) == 0)
1236 dwarf2_per_objfile->has_section_at_zero = 1;
1239 /* Decompress a section that was compressed using zlib. Store the
1240 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1243 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1244 gdb_byte **outbuf, bfd_size_type *outsize)
1246 bfd *abfd = objfile->obfd;
1248 error (_("Support for zlib-compressed DWARF data (from '%s') "
1249 "is disabled in this copy of GDB"),
1250 bfd_get_filename (abfd));
1252 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1253 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1254 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1255 bfd_size_type uncompressed_size;
1256 gdb_byte *uncompressed_buffer;
1259 int header_size = 12;
1261 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1262 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1263 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1264 bfd_get_filename (abfd));
1266 /* Read the zlib header. In this case, it should be "ZLIB" followed
1267 by the uncompressed section size, 8 bytes in big-endian order. */
1268 if (compressed_size < header_size
1269 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1270 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1271 bfd_get_filename (abfd));
1272 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1273 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1274 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1275 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1276 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1277 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1278 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1279 uncompressed_size += compressed_buffer[11];
1281 /* It is possible the section consists of several compressed
1282 buffers concatenated together, so we uncompress in a loop. */
1286 strm.avail_in = compressed_size - header_size;
1287 strm.next_in = (Bytef*) compressed_buffer + header_size;
1288 strm.avail_out = uncompressed_size;
1289 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1291 rc = inflateInit (&strm);
1292 while (strm.avail_in > 0)
1295 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1296 bfd_get_filename (abfd), rc);
1297 strm.next_out = ((Bytef*) uncompressed_buffer
1298 + (uncompressed_size - strm.avail_out));
1299 rc = inflate (&strm, Z_FINISH);
1300 if (rc != Z_STREAM_END)
1301 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1302 bfd_get_filename (abfd), rc);
1303 rc = inflateReset (&strm);
1305 rc = inflateEnd (&strm);
1307 || strm.avail_out != 0)
1308 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1309 bfd_get_filename (abfd), rc);
1311 do_cleanups (cleanup);
1312 *outbuf = uncompressed_buffer;
1313 *outsize = uncompressed_size;
1317 /* Read the contents of the section SECTP from object file specified by
1318 OBJFILE, store info about the section into INFO.
1319 If the section is compressed, uncompress it before returning. */
1322 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1324 bfd *abfd = objfile->obfd;
1325 asection *sectp = info->asection;
1326 gdb_byte *buf, *retbuf;
1327 unsigned char header[4];
1331 info->buffer = NULL;
1332 info->was_mmapped = 0;
1335 if (info->asection == NULL || info->size == 0)
1338 /* Check if the file has a 4-byte header indicating compression. */
1339 if (info->size > sizeof (header)
1340 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1341 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1343 /* Upon decompression, update the buffer and its size. */
1344 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1346 zlib_decompress_section (objfile, sectp, &info->buffer,
1354 pagesize = getpagesize ();
1356 /* Only try to mmap sections which are large enough: we don't want to
1357 waste space due to fragmentation. Also, only try mmap for sections
1358 without relocations. */
1360 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1362 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1363 size_t map_length = info->size + sectp->filepos - pg_offset;
1364 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1365 MAP_PRIVATE, pg_offset);
1367 if (retbuf != MAP_FAILED)
1369 info->was_mmapped = 1;
1370 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1371 #if HAVE_POSIX_MADVISE
1372 posix_madvise (retbuf, map_length, POSIX_MADV_WILLNEED);
1379 /* If we get here, we are a normal, not-compressed section. */
1381 = obstack_alloc (&objfile->objfile_obstack, info->size);
1383 /* When debugging .o files, we may need to apply relocations; see
1384 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1385 We never compress sections in .o files, so we only need to
1386 try this when the section is not compressed. */
1387 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1390 info->buffer = retbuf;
1394 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1395 || bfd_bread (buf, info->size, abfd) != info->size)
1396 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1397 bfd_get_filename (abfd));
1400 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1404 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1405 asection **sectp, gdb_byte **bufp,
1406 bfd_size_type *sizep)
1408 struct dwarf2_per_objfile *data
1409 = objfile_data (objfile, dwarf2_objfile_data_key);
1410 struct dwarf2_section_info *info;
1412 /* We may see an objfile without any DWARF, in which case we just
1421 if (section_is_p (section_name, EH_FRAME_SECTION))
1422 info = &data->eh_frame;
1423 else if (section_is_p (section_name, FRAME_SECTION))
1424 info = &data->frame;
1428 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1429 /* We haven't read this section in yet. Do it now. */
1430 dwarf2_read_section (objfile, info);
1432 *sectp = info->asection;
1433 *bufp = info->buffer;
1434 *sizep = info->size;
1437 /* Build a partial symbol table. */
1440 dwarf2_build_psymtabs (struct objfile *objfile)
1442 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
1444 init_psymbol_list (objfile, 1024);
1447 dwarf2_build_psymtabs_hard (objfile);
1450 /* Return TRUE if OFFSET is within CU_HEADER. */
1453 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
1455 unsigned int bottom = cu_header->offset;
1456 unsigned int top = (cu_header->offset
1458 + cu_header->initial_length_size);
1460 return (offset >= bottom && offset < top);
1463 /* Read in the comp unit header information from the debug_info at info_ptr.
1464 NOTE: This leaves members offset, first_die_offset to be filled in
1468 read_comp_unit_head (struct comp_unit_head *cu_header,
1469 gdb_byte *info_ptr, bfd *abfd)
1472 unsigned int bytes_read;
1474 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
1475 cu_header->initial_length_size = bytes_read;
1476 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
1477 info_ptr += bytes_read;
1478 cu_header->version = read_2_bytes (abfd, info_ptr);
1480 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1482 info_ptr += bytes_read;
1483 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1485 signed_addr = bfd_get_sign_extend_vma (abfd);
1486 if (signed_addr < 0)
1487 internal_error (__FILE__, __LINE__,
1488 _("read_comp_unit_head: dwarf from non elf file"));
1489 cu_header->signed_addr_p = signed_addr;
1495 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1496 gdb_byte *buffer, unsigned int buffer_size,
1499 gdb_byte *beg_of_comp_unit = info_ptr;
1501 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1503 if (header->version != 2 && header->version != 3 && header->version != 4)
1504 error (_("Dwarf Error: wrong version in compilation unit header "
1505 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
1506 bfd_get_filename (abfd));
1508 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
1509 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1510 "(offset 0x%lx + 6) [in module %s]"),
1511 (long) header->abbrev_offset,
1512 (long) (beg_of_comp_unit - buffer),
1513 bfd_get_filename (abfd));
1515 if (beg_of_comp_unit + header->length + header->initial_length_size
1516 > buffer + buffer_size)
1517 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1518 "(offset 0x%lx + 0) [in module %s]"),
1519 (long) header->length,
1520 (long) (beg_of_comp_unit - buffer),
1521 bfd_get_filename (abfd));
1526 /* Read in the types comp unit header information from .debug_types entry at
1527 types_ptr. The result is a pointer to one past the end of the header. */
1530 read_type_comp_unit_head (struct comp_unit_head *cu_header,
1531 ULONGEST *signature,
1532 gdb_byte *types_ptr, bfd *abfd)
1534 gdb_byte *initial_types_ptr = types_ptr;
1536 dwarf2_read_section (dwarf2_per_objfile->objfile,
1537 &dwarf2_per_objfile->types);
1538 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
1540 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
1542 *signature = read_8_bytes (abfd, types_ptr);
1544 types_ptr += cu_header->offset_size;
1545 cu_header->first_die_offset = types_ptr - initial_types_ptr;
1550 /* Allocate a new partial symtab for file named NAME and mark this new
1551 partial symtab as being an include of PST. */
1554 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1555 struct objfile *objfile)
1557 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1559 subpst->section_offsets = pst->section_offsets;
1560 subpst->textlow = 0;
1561 subpst->texthigh = 0;
1563 subpst->dependencies = (struct partial_symtab **)
1564 obstack_alloc (&objfile->objfile_obstack,
1565 sizeof (struct partial_symtab *));
1566 subpst->dependencies[0] = pst;
1567 subpst->number_of_dependencies = 1;
1569 subpst->globals_offset = 0;
1570 subpst->n_global_syms = 0;
1571 subpst->statics_offset = 0;
1572 subpst->n_static_syms = 0;
1573 subpst->symtab = NULL;
1574 subpst->read_symtab = pst->read_symtab;
1577 /* No private part is necessary for include psymtabs. This property
1578 can be used to differentiate between such include psymtabs and
1579 the regular ones. */
1580 subpst->read_symtab_private = NULL;
1583 /* Read the Line Number Program data and extract the list of files
1584 included by the source file represented by PST. Build an include
1585 partial symtab for each of these included files. */
1588 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1589 struct die_info *die,
1590 struct partial_symtab *pst)
1592 struct objfile *objfile = cu->objfile;
1593 bfd *abfd = objfile->obfd;
1594 struct line_header *lh = NULL;
1595 struct attribute *attr;
1597 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
1600 unsigned int line_offset = DW_UNSND (attr);
1602 lh = dwarf_decode_line_header (line_offset, abfd, cu);
1605 return; /* No linetable, so no includes. */
1607 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1609 free_line_header (lh);
1613 hash_type_signature (const void *item)
1615 const struct signatured_type *type_sig = item;
1617 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1618 return type_sig->signature;
1622 eq_type_signature (const void *item_lhs, const void *item_rhs)
1624 const struct signatured_type *lhs = item_lhs;
1625 const struct signatured_type *rhs = item_rhs;
1627 return lhs->signature == rhs->signature;
1630 /* Create the hash table of all entries in the .debug_types section.
1631 The result is zero if there is an error (e.g. missing .debug_types section),
1632 otherwise non-zero. */
1635 create_debug_types_hash_table (struct objfile *objfile)
1640 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
1641 info_ptr = dwarf2_per_objfile->types.buffer;
1643 if (info_ptr == NULL)
1645 dwarf2_per_objfile->signatured_types = NULL;
1649 types_htab = htab_create_alloc_ex (41,
1650 hash_type_signature,
1653 &objfile->objfile_obstack,
1654 hashtab_obstack_allocate,
1655 dummy_obstack_deallocate);
1657 if (dwarf2_die_debug)
1658 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
1660 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1662 unsigned int offset;
1663 unsigned int offset_size;
1664 unsigned int type_offset;
1665 unsigned int length, initial_length_size;
1666 unsigned short version;
1668 struct signatured_type *type_sig;
1670 gdb_byte *ptr = info_ptr;
1672 offset = ptr - dwarf2_per_objfile->types.buffer;
1674 /* We need to read the type's signature in order to build the hash
1675 table, but we don't need to read anything else just yet. */
1677 /* Sanity check to ensure entire cu is present. */
1678 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
1679 if (ptr + length + initial_length_size
1680 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1682 complaint (&symfile_complaints,
1683 _("debug type entry runs off end of `.debug_types' section, ignored"));
1687 offset_size = initial_length_size == 4 ? 4 : 8;
1688 ptr += initial_length_size;
1689 version = bfd_get_16 (objfile->obfd, ptr);
1691 ptr += offset_size; /* abbrev offset */
1692 ptr += 1; /* address size */
1693 signature = bfd_get_64 (objfile->obfd, ptr);
1695 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
1697 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
1698 memset (type_sig, 0, sizeof (*type_sig));
1699 type_sig->signature = signature;
1700 type_sig->offset = offset;
1701 type_sig->type_offset = type_offset;
1703 slot = htab_find_slot (types_htab, type_sig, INSERT);
1704 gdb_assert (slot != NULL);
1707 if (dwarf2_die_debug)
1708 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
1709 offset, phex (signature, sizeof (signature)));
1711 info_ptr = info_ptr + initial_length_size + length;
1714 dwarf2_per_objfile->signatured_types = types_htab;
1719 /* Lookup a signature based type.
1720 Returns NULL if SIG is not present in the table. */
1722 static struct signatured_type *
1723 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
1725 struct signatured_type find_entry, *entry;
1727 if (dwarf2_per_objfile->signatured_types == NULL)
1729 complaint (&symfile_complaints,
1730 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1734 find_entry.signature = sig;
1735 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
1739 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1742 init_cu_die_reader (struct die_reader_specs *reader,
1743 struct dwarf2_cu *cu)
1745 reader->abfd = cu->objfile->obfd;
1747 if (cu->per_cu->from_debug_types)
1749 gdb_assert (dwarf2_per_objfile->types.readin);
1750 reader->buffer = dwarf2_per_objfile->types.buffer;
1754 gdb_assert (dwarf2_per_objfile->info.readin);
1755 reader->buffer = dwarf2_per_objfile->info.buffer;
1759 /* Find the base address of the compilation unit for range lists and
1760 location lists. It will normally be specified by DW_AT_low_pc.
1761 In DWARF-3 draft 4, the base address could be overridden by
1762 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1763 compilation units with discontinuous ranges. */
1766 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
1768 struct attribute *attr;
1771 cu->base_address = 0;
1773 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
1776 cu->base_address = DW_ADDR (attr);
1781 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
1784 cu->base_address = DW_ADDR (attr);
1790 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1791 to combine the common parts.
1792 Process a compilation unit for a psymtab.
1793 BUFFER is a pointer to the beginning of the dwarf section buffer,
1794 either .debug_info or debug_types.
1795 INFO_PTR is a pointer to the start of the CU.
1796 Returns a pointer to the next CU. */
1799 process_psymtab_comp_unit (struct objfile *objfile,
1800 struct dwarf2_per_cu_data *this_cu,
1801 gdb_byte *buffer, gdb_byte *info_ptr,
1802 unsigned int buffer_size)
1804 bfd *abfd = objfile->obfd;
1805 gdb_byte *beg_of_comp_unit = info_ptr;
1806 struct die_info *comp_unit_die;
1807 struct partial_symtab *pst;
1809 struct cleanup *back_to_inner;
1810 struct dwarf2_cu cu;
1811 int has_children, has_pc_info;
1812 struct attribute *attr;
1813 CORE_ADDR best_lowpc = 0, best_highpc = 0;
1814 struct die_reader_specs reader_specs;
1816 memset (&cu, 0, sizeof (cu));
1817 cu.objfile = objfile;
1818 obstack_init (&cu.comp_unit_obstack);
1820 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1822 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
1823 buffer, buffer_size,
1826 /* Complete the cu_header. */
1827 cu.header.offset = beg_of_comp_unit - buffer;
1828 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
1830 cu.list_in_scope = &file_symbols;
1832 /* If this compilation unit was already read in, free the
1833 cached copy in order to read it in again. This is
1834 necessary because we skipped some symbols when we first
1835 read in the compilation unit (see load_partial_dies).
1836 This problem could be avoided, but the benefit is
1838 if (this_cu->cu != NULL)
1839 free_one_cached_comp_unit (this_cu->cu);
1841 /* Note that this is a pointer to our stack frame, being
1842 added to a global data structure. It will be cleaned up
1843 in free_stack_comp_unit when we finish with this
1844 compilation unit. */
1846 cu.per_cu = this_cu;
1848 /* Read the abbrevs for this compilation unit into a table. */
1849 dwarf2_read_abbrevs (abfd, &cu);
1850 make_cleanup (dwarf2_free_abbrev_table, &cu);
1852 /* Read the compilation unit die. */
1853 if (this_cu->from_debug_types)
1854 info_ptr += 8 /*signature*/ + cu.header.offset_size;
1855 init_cu_die_reader (&reader_specs, &cu);
1856 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
1859 if (this_cu->from_debug_types)
1861 /* offset,length haven't been set yet for type units. */
1862 this_cu->offset = cu.header.offset;
1863 this_cu->length = cu.header.length + cu.header.initial_length_size;
1865 else if (comp_unit_die->tag == DW_TAG_partial_unit)
1867 info_ptr = (beg_of_comp_unit + cu.header.length
1868 + cu.header.initial_length_size);
1869 do_cleanups (back_to_inner);
1873 /* Set the language we're debugging. */
1874 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
1876 set_cu_language (DW_UNSND (attr), &cu);
1878 set_cu_language (language_minimal, &cu);
1880 /* Allocate a new partial symbol table structure. */
1881 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
1882 pst = start_psymtab_common (objfile, objfile->section_offsets,
1883 (attr != NULL) ? DW_STRING (attr) : "",
1884 /* TEXTLOW and TEXTHIGH are set below. */
1886 objfile->global_psymbols.next,
1887 objfile->static_psymbols.next);
1889 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
1891 pst->dirname = DW_STRING (attr);
1893 pst->read_symtab_private = this_cu;
1895 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1897 /* Store the function that reads in the rest of the symbol table */
1898 pst->read_symtab = dwarf2_psymtab_to_symtab;
1900 this_cu->psymtab = pst;
1902 dwarf2_find_base_address (comp_unit_die, &cu);
1904 /* Possibly set the default values of LOWPC and HIGHPC from
1906 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
1907 &best_highpc, &cu, pst);
1908 if (has_pc_info == 1 && best_lowpc < best_highpc)
1909 /* Store the contiguous range if it is not empty; it can be empty for
1910 CUs with no code. */
1911 addrmap_set_empty (objfile->psymtabs_addrmap,
1912 best_lowpc + baseaddr,
1913 best_highpc + baseaddr - 1, pst);
1915 /* Check if comp unit has_children.
1916 If so, read the rest of the partial symbols from this comp unit.
1917 If not, there's no more debug_info for this comp unit. */
1920 struct partial_die_info *first_die;
1921 CORE_ADDR lowpc, highpc;
1923 lowpc = ((CORE_ADDR) -1);
1924 highpc = ((CORE_ADDR) 0);
1926 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
1928 scan_partial_symbols (first_die, &lowpc, &highpc,
1929 ! has_pc_info, &cu);
1931 /* If we didn't find a lowpc, set it to highpc to avoid
1932 complaints from `maint check'. */
1933 if (lowpc == ((CORE_ADDR) -1))
1936 /* If the compilation unit didn't have an explicit address range,
1937 then use the information extracted from its child dies. */
1941 best_highpc = highpc;
1944 pst->textlow = best_lowpc + baseaddr;
1945 pst->texthigh = best_highpc + baseaddr;
1947 pst->n_global_syms = objfile->global_psymbols.next -
1948 (objfile->global_psymbols.list + pst->globals_offset);
1949 pst->n_static_syms = objfile->static_psymbols.next -
1950 (objfile->static_psymbols.list + pst->statics_offset);
1951 sort_pst_symbols (pst);
1953 info_ptr = (beg_of_comp_unit + cu.header.length
1954 + cu.header.initial_length_size);
1956 if (this_cu->from_debug_types)
1958 /* It's not clear we want to do anything with stmt lists here.
1959 Waiting to see what gcc ultimately does. */
1963 /* Get the list of files included in the current compilation unit,
1964 and build a psymtab for each of them. */
1965 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
1968 do_cleanups (back_to_inner);
1973 /* Traversal function for htab_traverse_noresize.
1974 Process one .debug_types comp-unit. */
1977 process_type_comp_unit (void **slot, void *info)
1979 struct signatured_type *entry = (struct signatured_type *) *slot;
1980 struct objfile *objfile = (struct objfile *) info;
1981 struct dwarf2_per_cu_data *this_cu;
1983 this_cu = &entry->per_cu;
1984 this_cu->from_debug_types = 1;
1986 gdb_assert (dwarf2_per_objfile->types.readin);
1987 process_psymtab_comp_unit (objfile, this_cu,
1988 dwarf2_per_objfile->types.buffer,
1989 dwarf2_per_objfile->types.buffer + entry->offset,
1990 dwarf2_per_objfile->types.size);
1995 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1996 Build partial symbol tables for the .debug_types comp-units. */
1999 build_type_psymtabs (struct objfile *objfile)
2001 if (! create_debug_types_hash_table (objfile))
2004 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
2005 process_type_comp_unit, objfile);
2008 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
2011 psymtabs_addrmap_cleanup (void *o)
2013 struct objfile *objfile = o;
2015 objfile->psymtabs_addrmap = NULL;
2018 /* Build the partial symbol table by doing a quick pass through the
2019 .debug_info and .debug_abbrev sections. */
2022 dwarf2_build_psymtabs_hard (struct objfile *objfile)
2025 struct cleanup *back_to, *addrmap_cleanup;
2026 struct obstack temp_obstack;
2028 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
2029 info_ptr = dwarf2_per_objfile->info.buffer;
2031 /* Any cached compilation units will be linked by the per-objfile
2032 read_in_chain. Make sure to free them when we're done. */
2033 back_to = make_cleanup (free_cached_comp_units, NULL);
2035 build_type_psymtabs (objfile);
2037 create_all_comp_units (objfile);
2039 /* Create a temporary address map on a temporary obstack. We later
2040 copy this to the final obstack. */
2041 obstack_init (&temp_obstack);
2042 make_cleanup_obstack_free (&temp_obstack);
2043 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
2044 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
2046 /* Since the objects we're extracting from .debug_info vary in
2047 length, only the individual functions to extract them (like
2048 read_comp_unit_head and load_partial_die) can really know whether
2049 the buffer is large enough to hold another complete object.
2051 At the moment, they don't actually check that. If .debug_info
2052 holds just one extra byte after the last compilation unit's dies,
2053 then read_comp_unit_head will happily read off the end of the
2054 buffer. read_partial_die is similarly casual. Those functions
2057 For this loop condition, simply checking whether there's any data
2058 left at all should be sufficient. */
2060 while (info_ptr < (dwarf2_per_objfile->info.buffer
2061 + dwarf2_per_objfile->info.size))
2063 struct dwarf2_per_cu_data *this_cu;
2065 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
2068 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
2069 dwarf2_per_objfile->info.buffer,
2071 dwarf2_per_objfile->info.size);
2074 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
2075 &objfile->objfile_obstack);
2076 discard_cleanups (addrmap_cleanup);
2078 do_cleanups (back_to);
2081 /* Load the partial DIEs for a secondary CU into memory. */
2084 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
2085 struct objfile *objfile)
2087 bfd *abfd = objfile->obfd;
2088 gdb_byte *info_ptr, *beg_of_comp_unit;
2089 struct die_info *comp_unit_die;
2090 struct dwarf2_cu *cu;
2091 struct cleanup *back_to;
2092 struct attribute *attr;
2094 struct die_reader_specs reader_specs;
2096 gdb_assert (! this_cu->from_debug_types);
2098 gdb_assert (dwarf2_per_objfile->info.readin);
2099 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
2100 beg_of_comp_unit = info_ptr;
2102 cu = alloc_one_comp_unit (objfile);
2104 /* ??? Missing cleanup for CU? */
2106 /* Link this compilation unit into the compilation unit tree. */
2108 cu->per_cu = this_cu;
2109 cu->type_hash = this_cu->type_hash;
2111 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
2112 dwarf2_per_objfile->info.buffer,
2113 dwarf2_per_objfile->info.size,
2116 /* Complete the cu_header. */
2117 cu->header.offset = this_cu->offset;
2118 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
2120 /* Read the abbrevs for this compilation unit into a table. */
2121 dwarf2_read_abbrevs (abfd, cu);
2122 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2124 /* Read the compilation unit die. */
2125 init_cu_die_reader (&reader_specs, cu);
2126 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2129 /* Set the language we're debugging. */
2130 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
2132 set_cu_language (DW_UNSND (attr), cu);
2134 set_cu_language (language_minimal, cu);
2136 /* Check if comp unit has_children.
2137 If so, read the rest of the partial symbols from this comp unit.
2138 If not, there's no more debug_info for this comp unit. */
2140 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
2142 do_cleanups (back_to);
2145 /* Create a list of all compilation units in OBJFILE. We do this only
2146 if an inter-comp-unit reference is found; presumably if there is one,
2147 there will be many, and one will occur early in the .debug_info section.
2148 So there's no point in building this list incrementally. */
2151 create_all_comp_units (struct objfile *objfile)
2155 struct dwarf2_per_cu_data **all_comp_units;
2158 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
2159 info_ptr = dwarf2_per_objfile->info.buffer;
2163 all_comp_units = xmalloc (n_allocated
2164 * sizeof (struct dwarf2_per_cu_data *));
2166 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
2168 unsigned int length, initial_length_size;
2169 struct dwarf2_per_cu_data *this_cu;
2170 unsigned int offset;
2172 offset = info_ptr - dwarf2_per_objfile->info.buffer;
2174 /* Read just enough information to find out where the next
2175 compilation unit is. */
2176 length = read_initial_length (objfile->obfd, info_ptr,
2177 &initial_length_size);
2179 /* Save the compilation unit for later lookup. */
2180 this_cu = obstack_alloc (&objfile->objfile_obstack,
2181 sizeof (struct dwarf2_per_cu_data));
2182 memset (this_cu, 0, sizeof (*this_cu));
2183 this_cu->offset = offset;
2184 this_cu->length = length + initial_length_size;
2186 if (n_comp_units == n_allocated)
2189 all_comp_units = xrealloc (all_comp_units,
2191 * sizeof (struct dwarf2_per_cu_data *));
2193 all_comp_units[n_comp_units++] = this_cu;
2195 info_ptr = info_ptr + this_cu->length;
2198 dwarf2_per_objfile->all_comp_units
2199 = obstack_alloc (&objfile->objfile_obstack,
2200 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2201 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
2202 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2203 xfree (all_comp_units);
2204 dwarf2_per_objfile->n_comp_units = n_comp_units;
2207 /* Process all loaded DIEs for compilation unit CU, starting at
2208 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2209 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2210 DW_AT_ranges). If NEED_PC is set, then this function will set
2211 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2212 and record the covered ranges in the addrmap. */
2215 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
2216 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2218 struct partial_die_info *pdi;
2220 /* Now, march along the PDI's, descending into ones which have
2221 interesting children but skipping the children of the other ones,
2222 until we reach the end of the compilation unit. */
2228 fixup_partial_die (pdi, cu);
2230 /* Anonymous namespaces or modules have no name but have interesting
2231 children, so we need to look at them. Ditto for anonymous
2234 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
2235 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
2239 case DW_TAG_subprogram:
2240 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2242 case DW_TAG_variable:
2243 case DW_TAG_typedef:
2244 case DW_TAG_union_type:
2245 if (!pdi->is_declaration)
2247 add_partial_symbol (pdi, cu);
2250 case DW_TAG_class_type:
2251 case DW_TAG_interface_type:
2252 case DW_TAG_structure_type:
2253 if (!pdi->is_declaration)
2255 add_partial_symbol (pdi, cu);
2258 case DW_TAG_enumeration_type:
2259 if (!pdi->is_declaration)
2260 add_partial_enumeration (pdi, cu);
2262 case DW_TAG_base_type:
2263 case DW_TAG_subrange_type:
2264 /* File scope base type definitions are added to the partial
2266 add_partial_symbol (pdi, cu);
2268 case DW_TAG_namespace:
2269 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
2272 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
2279 /* If the die has a sibling, skip to the sibling. */
2281 pdi = pdi->die_sibling;
2285 /* Functions used to compute the fully scoped name of a partial DIE.
2287 Normally, this is simple. For C++, the parent DIE's fully scoped
2288 name is concatenated with "::" and the partial DIE's name. For
2289 Java, the same thing occurs except that "." is used instead of "::".
2290 Enumerators are an exception; they use the scope of their parent
2291 enumeration type, i.e. the name of the enumeration type is not
2292 prepended to the enumerator.
2294 There are two complexities. One is DW_AT_specification; in this
2295 case "parent" means the parent of the target of the specification,
2296 instead of the direct parent of the DIE. The other is compilers
2297 which do not emit DW_TAG_namespace; in this case we try to guess
2298 the fully qualified name of structure types from their members'
2299 linkage names. This must be done using the DIE's children rather
2300 than the children of any DW_AT_specification target. We only need
2301 to do this for structures at the top level, i.e. if the target of
2302 any DW_AT_specification (if any; otherwise the DIE itself) does not
2305 /* Compute the scope prefix associated with PDI's parent, in
2306 compilation unit CU. The result will be allocated on CU's
2307 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2308 field. NULL is returned if no prefix is necessary. */
2310 partial_die_parent_scope (struct partial_die_info *pdi,
2311 struct dwarf2_cu *cu)
2313 char *grandparent_scope;
2314 struct partial_die_info *parent, *real_pdi;
2316 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2317 then this means the parent of the specification DIE. */
2320 while (real_pdi->has_specification)
2321 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2323 parent = real_pdi->die_parent;
2327 if (parent->scope_set)
2328 return parent->scope;
2330 fixup_partial_die (parent, cu);
2332 grandparent_scope = partial_die_parent_scope (parent, cu);
2334 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2335 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2336 Work around this problem here. */
2337 if (cu->language == language_cplus
2338 && parent->tag == DW_TAG_namespace
2339 && strcmp (parent->name, "::") == 0
2340 && grandparent_scope == NULL)
2342 parent->scope = NULL;
2343 parent->scope_set = 1;
2347 if (parent->tag == DW_TAG_namespace
2348 || parent->tag == DW_TAG_module
2349 || parent->tag == DW_TAG_structure_type
2350 || parent->tag == DW_TAG_class_type
2351 || parent->tag == DW_TAG_interface_type
2352 || parent->tag == DW_TAG_union_type
2353 || parent->tag == DW_TAG_enumeration_type)
2355 if (grandparent_scope == NULL)
2356 parent->scope = parent->name;
2358 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
2359 parent->name, 0, cu);
2361 else if (parent->tag == DW_TAG_enumerator)
2362 /* Enumerators should not get the name of the enumeration as a prefix. */
2363 parent->scope = grandparent_scope;
2366 /* FIXME drow/2004-04-01: What should we be doing with
2367 function-local names? For partial symbols, we should probably be
2369 complaint (&symfile_complaints,
2370 _("unhandled containing DIE tag %d for DIE at %d"),
2371 parent->tag, pdi->offset);
2372 parent->scope = grandparent_scope;
2375 parent->scope_set = 1;
2376 return parent->scope;
2379 /* Return the fully scoped name associated with PDI, from compilation unit
2380 CU. The result will be allocated with malloc. */
2382 partial_die_full_name (struct partial_die_info *pdi,
2383 struct dwarf2_cu *cu)
2387 parent_scope = partial_die_parent_scope (pdi, cu);
2388 if (parent_scope == NULL)
2391 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
2395 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
2397 struct objfile *objfile = cu->objfile;
2399 char *actual_name = NULL;
2400 const struct partial_symbol *psym = NULL;
2402 int built_actual_name = 0;
2404 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2406 actual_name = partial_die_full_name (pdi, cu);
2408 built_actual_name = 1;
2410 if (actual_name == NULL)
2411 actual_name = pdi->name;
2415 case DW_TAG_subprogram:
2416 if (pdi->is_external || cu->language == language_ada)
2418 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2419 of the global scope. But in Ada, we want to be able to access
2420 nested procedures globally. So all Ada subprograms are stored
2421 in the global scope. */
2422 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2423 mst_text, objfile); */
2424 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2426 VAR_DOMAIN, LOC_BLOCK,
2427 &objfile->global_psymbols,
2428 0, pdi->lowpc + baseaddr,
2429 cu->language, objfile);
2433 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2434 mst_file_text, objfile); */
2435 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2437 VAR_DOMAIN, LOC_BLOCK,
2438 &objfile->static_psymbols,
2439 0, pdi->lowpc + baseaddr,
2440 cu->language, objfile);
2443 case DW_TAG_variable:
2444 if (pdi->is_external)
2447 Don't enter into the minimal symbol tables as there is
2448 a minimal symbol table entry from the ELF symbols already.
2449 Enter into partial symbol table if it has a location
2450 descriptor or a type.
2451 If the location descriptor is missing, new_symbol will create
2452 a LOC_UNRESOLVED symbol, the address of the variable will then
2453 be determined from the minimal symbol table whenever the variable
2455 The address for the partial symbol table entry is not
2456 used by GDB, but it comes in handy for debugging partial symbol
2460 addr = decode_locdesc (pdi->locdesc, cu);
2461 if (pdi->locdesc || pdi->has_type)
2462 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2464 VAR_DOMAIN, LOC_STATIC,
2465 &objfile->global_psymbols,
2467 cu->language, objfile);
2471 /* Static Variable. Skip symbols without location descriptors. */
2472 if (pdi->locdesc == NULL)
2474 if (built_actual_name)
2475 xfree (actual_name);
2478 addr = decode_locdesc (pdi->locdesc, cu);
2479 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2480 mst_file_data, objfile); */
2481 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2483 VAR_DOMAIN, LOC_STATIC,
2484 &objfile->static_psymbols,
2486 cu->language, objfile);
2489 case DW_TAG_typedef:
2490 case DW_TAG_base_type:
2491 case DW_TAG_subrange_type:
2492 add_psymbol_to_list (actual_name, strlen (actual_name),
2494 VAR_DOMAIN, LOC_TYPEDEF,
2495 &objfile->static_psymbols,
2496 0, (CORE_ADDR) 0, cu->language, objfile);
2498 case DW_TAG_namespace:
2499 add_psymbol_to_list (actual_name, strlen (actual_name),
2501 VAR_DOMAIN, LOC_TYPEDEF,
2502 &objfile->global_psymbols,
2503 0, (CORE_ADDR) 0, cu->language, objfile);
2505 case DW_TAG_class_type:
2506 case DW_TAG_interface_type:
2507 case DW_TAG_structure_type:
2508 case DW_TAG_union_type:
2509 case DW_TAG_enumeration_type:
2510 /* Skip external references. The DWARF standard says in the section
2511 about "Structure, Union, and Class Type Entries": "An incomplete
2512 structure, union or class type is represented by a structure,
2513 union or class entry that does not have a byte size attribute
2514 and that has a DW_AT_declaration attribute." */
2515 if (!pdi->has_byte_size && pdi->is_declaration)
2517 if (built_actual_name)
2518 xfree (actual_name);
2522 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2523 static vs. global. */
2524 add_psymbol_to_list (actual_name, strlen (actual_name),
2526 STRUCT_DOMAIN, LOC_TYPEDEF,
2527 (cu->language == language_cplus
2528 || cu->language == language_java)
2529 ? &objfile->global_psymbols
2530 : &objfile->static_psymbols,
2531 0, (CORE_ADDR) 0, cu->language, objfile);
2534 case DW_TAG_enumerator:
2535 add_psymbol_to_list (actual_name, strlen (actual_name),
2537 VAR_DOMAIN, LOC_CONST,
2538 (cu->language == language_cplus
2539 || cu->language == language_java)
2540 ? &objfile->global_psymbols
2541 : &objfile->static_psymbols,
2542 0, (CORE_ADDR) 0, cu->language, objfile);
2548 if (built_actual_name)
2549 xfree (actual_name);
2552 /* Read a partial die corresponding to a namespace; also, add a symbol
2553 corresponding to that namespace to the symbol table. NAMESPACE is
2554 the name of the enclosing namespace. */
2557 add_partial_namespace (struct partial_die_info *pdi,
2558 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2559 int need_pc, struct dwarf2_cu *cu)
2561 /* Add a symbol for the namespace. */
2563 add_partial_symbol (pdi, cu);
2565 /* Now scan partial symbols in that namespace. */
2567 if (pdi->has_children)
2568 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2571 /* Read a partial die corresponding to a Fortran module. */
2574 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
2575 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2577 /* Now scan partial symbols in that module. */
2579 if (pdi->has_children)
2580 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2583 /* Read a partial die corresponding to a subprogram and create a partial
2584 symbol for that subprogram. When the CU language allows it, this
2585 routine also defines a partial symbol for each nested subprogram
2586 that this subprogram contains.
2588 DIE my also be a lexical block, in which case we simply search
2589 recursively for suprograms defined inside that lexical block.
2590 Again, this is only performed when the CU language allows this
2591 type of definitions. */
2594 add_partial_subprogram (struct partial_die_info *pdi,
2595 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2596 int need_pc, struct dwarf2_cu *cu)
2598 if (pdi->tag == DW_TAG_subprogram)
2600 if (pdi->has_pc_info)
2602 if (pdi->lowpc < *lowpc)
2603 *lowpc = pdi->lowpc;
2604 if (pdi->highpc > *highpc)
2605 *highpc = pdi->highpc;
2609 struct objfile *objfile = cu->objfile;
2611 baseaddr = ANOFFSET (objfile->section_offsets,
2612 SECT_OFF_TEXT (objfile));
2613 addrmap_set_empty (objfile->psymtabs_addrmap,
2614 pdi->lowpc + baseaddr,
2615 pdi->highpc - 1 + baseaddr,
2616 cu->per_cu->psymtab);
2618 if (!pdi->is_declaration)
2619 /* Ignore subprogram DIEs that do not have a name, they are
2620 illegal. Do not emit a complaint at this point, we will
2621 do so when we convert this psymtab into a symtab. */
2623 add_partial_symbol (pdi, cu);
2627 if (! pdi->has_children)
2630 if (cu->language == language_ada)
2632 pdi = pdi->die_child;
2635 fixup_partial_die (pdi, cu);
2636 if (pdi->tag == DW_TAG_subprogram
2637 || pdi->tag == DW_TAG_lexical_block)
2638 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2639 pdi = pdi->die_sibling;
2644 /* See if we can figure out if the class lives in a namespace. We do
2645 this by looking for a member function; its demangled name will
2646 contain namespace info, if there is any. */
2649 guess_structure_name (struct partial_die_info *struct_pdi,
2650 struct dwarf2_cu *cu)
2652 if ((cu->language == language_cplus
2653 || cu->language == language_java)
2654 && cu->has_namespace_info == 0
2655 && struct_pdi->has_children)
2657 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2658 what template types look like, because the demangler
2659 frequently doesn't give the same name as the debug info. We
2660 could fix this by only using the demangled name to get the
2661 prefix (but see comment in read_structure_type). */
2663 struct partial_die_info *real_pdi;
2665 /* If this DIE (this DIE's specification, if any) has a parent, then
2666 we should not do this. We'll prepend the parent's fully qualified
2667 name when we create the partial symbol. */
2669 real_pdi = struct_pdi;
2670 while (real_pdi->has_specification)
2671 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2673 if (real_pdi->die_parent != NULL)
2678 /* Read a partial die corresponding to an enumeration type. */
2681 add_partial_enumeration (struct partial_die_info *enum_pdi,
2682 struct dwarf2_cu *cu)
2684 struct partial_die_info *pdi;
2686 if (enum_pdi->name != NULL)
2687 add_partial_symbol (enum_pdi, cu);
2689 pdi = enum_pdi->die_child;
2692 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2693 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2695 add_partial_symbol (pdi, cu);
2696 pdi = pdi->die_sibling;
2700 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2701 Return the corresponding abbrev, or NULL if the number is zero (indicating
2702 an empty DIE). In either case *BYTES_READ will be set to the length of
2703 the initial number. */
2705 static struct abbrev_info *
2706 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2707 struct dwarf2_cu *cu)
2709 bfd *abfd = cu->objfile->obfd;
2710 unsigned int abbrev_number;
2711 struct abbrev_info *abbrev;
2713 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2715 if (abbrev_number == 0)
2718 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2721 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2722 bfd_get_filename (abfd));
2728 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2729 Returns a pointer to the end of a series of DIEs, terminated by an empty
2730 DIE. Any children of the skipped DIEs will also be skipped. */
2733 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
2735 struct abbrev_info *abbrev;
2736 unsigned int bytes_read;
2740 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2742 return info_ptr + bytes_read;
2744 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
2748 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2749 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2750 abbrev corresponding to that skipped uleb128 should be passed in
2751 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2755 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
2756 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
2758 unsigned int bytes_read;
2759 struct attribute attr;
2760 bfd *abfd = cu->objfile->obfd;
2761 unsigned int form, i;
2763 for (i = 0; i < abbrev->num_attrs; i++)
2765 /* The only abbrev we care about is DW_AT_sibling. */
2766 if (abbrev->attrs[i].name == DW_AT_sibling)
2768 read_attribute (&attr, &abbrev->attrs[i],
2769 abfd, info_ptr, cu);
2770 if (attr.form == DW_FORM_ref_addr)
2771 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2773 return buffer + dwarf2_get_ref_die_offset (&attr);
2776 /* If it isn't DW_AT_sibling, skip this attribute. */
2777 form = abbrev->attrs[i].form;
2781 case DW_FORM_ref_addr:
2782 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2783 and later it is offset sized. */
2784 if (cu->header.version == 2)
2785 info_ptr += cu->header.addr_size;
2787 info_ptr += cu->header.offset_size;
2790 info_ptr += cu->header.addr_size;
2797 case DW_FORM_flag_present:
2812 case DW_FORM_string:
2813 read_string (abfd, info_ptr, &bytes_read);
2814 info_ptr += bytes_read;
2816 case DW_FORM_sec_offset:
2818 info_ptr += cu->header.offset_size;
2820 case DW_FORM_exprloc:
2822 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2823 info_ptr += bytes_read;
2825 case DW_FORM_block1:
2826 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2828 case DW_FORM_block2:
2829 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2831 case DW_FORM_block4:
2832 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2836 case DW_FORM_ref_udata:
2837 info_ptr = skip_leb128 (abfd, info_ptr);
2839 case DW_FORM_indirect:
2840 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2841 info_ptr += bytes_read;
2842 /* We need to continue parsing from here, so just go back to
2844 goto skip_attribute;
2847 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2848 dwarf_form_name (form),
2849 bfd_get_filename (abfd));
2853 if (abbrev->has_children)
2854 return skip_children (buffer, info_ptr, cu);
2859 /* Locate ORIG_PDI's sibling.
2860 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2864 locate_pdi_sibling (struct partial_die_info *orig_pdi,
2865 gdb_byte *buffer, gdb_byte *info_ptr,
2866 bfd *abfd, struct dwarf2_cu *cu)
2868 /* Do we know the sibling already? */
2870 if (orig_pdi->sibling)
2871 return orig_pdi->sibling;
2873 /* Are there any children to deal with? */
2875 if (!orig_pdi->has_children)
2878 /* Skip the children the long way. */
2880 return skip_children (buffer, info_ptr, cu);
2883 /* Expand this partial symbol table into a full symbol table. */
2886 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2888 /* FIXME: This is barely more than a stub. */
2893 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2899 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2900 gdb_flush (gdb_stdout);
2903 /* Restore our global data. */
2904 dwarf2_per_objfile = objfile_data (pst->objfile,
2905 dwarf2_objfile_data_key);
2907 /* If this psymtab is constructed from a debug-only objfile, the
2908 has_section_at_zero flag will not necessarily be correct. We
2909 can get the correct value for this flag by looking at the data
2910 associated with the (presumably stripped) associated objfile. */
2911 if (pst->objfile->separate_debug_objfile_backlink)
2913 struct dwarf2_per_objfile *dpo_backlink
2914 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
2915 dwarf2_objfile_data_key);
2917 dwarf2_per_objfile->has_section_at_zero
2918 = dpo_backlink->has_section_at_zero;
2921 psymtab_to_symtab_1 (pst);
2923 /* Finish up the debug error message. */
2925 printf_filtered (_("done.\n"));
2930 /* Add PER_CU to the queue. */
2933 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
2935 struct dwarf2_queue_item *item;
2938 item = xmalloc (sizeof (*item));
2939 item->per_cu = per_cu;
2942 if (dwarf2_queue == NULL)
2943 dwarf2_queue = item;
2945 dwarf2_queue_tail->next = item;
2947 dwarf2_queue_tail = item;
2950 /* Process the queue. */
2953 process_queue (struct objfile *objfile)
2955 struct dwarf2_queue_item *item, *next_item;
2957 /* The queue starts out with one item, but following a DIE reference
2958 may load a new CU, adding it to the end of the queue. */
2959 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
2961 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
2962 process_full_comp_unit (item->per_cu);
2964 item->per_cu->queued = 0;
2965 next_item = item->next;
2969 dwarf2_queue_tail = NULL;
2972 /* Free all allocated queue entries. This function only releases anything if
2973 an error was thrown; if the queue was processed then it would have been
2974 freed as we went along. */
2977 dwarf2_release_queue (void *dummy)
2979 struct dwarf2_queue_item *item, *last;
2981 item = dwarf2_queue;
2984 /* Anything still marked queued is likely to be in an
2985 inconsistent state, so discard it. */
2986 if (item->per_cu->queued)
2988 if (item->per_cu->cu != NULL)
2989 free_one_cached_comp_unit (item->per_cu->cu);
2990 item->per_cu->queued = 0;
2998 dwarf2_queue = dwarf2_queue_tail = NULL;
3001 /* Read in full symbols for PST, and anything it depends on. */
3004 psymtab_to_symtab_1 (struct partial_symtab *pst)
3006 struct dwarf2_per_cu_data *per_cu;
3007 struct cleanup *back_to;
3010 for (i = 0; i < pst->number_of_dependencies; i++)
3011 if (!pst->dependencies[i]->readin)
3013 /* Inform about additional files that need to be read in. */
3016 /* FIXME: i18n: Need to make this a single string. */
3017 fputs_filtered (" ", gdb_stdout);
3019 fputs_filtered ("and ", gdb_stdout);
3021 printf_filtered ("%s...", pst->dependencies[i]->filename);
3022 wrap_here (""); /* Flush output */
3023 gdb_flush (gdb_stdout);
3025 psymtab_to_symtab_1 (pst->dependencies[i]);
3028 per_cu = pst->read_symtab_private;
3032 /* It's an include file, no symbols to read for it.
3033 Everything is in the parent symtab. */
3038 back_to = make_cleanup (dwarf2_release_queue, NULL);
3040 queue_comp_unit (per_cu, pst->objfile);
3042 if (per_cu->from_debug_types)
3043 read_signatured_type_at_offset (pst->objfile, per_cu->offset);
3045 load_full_comp_unit (per_cu, pst->objfile);
3047 process_queue (pst->objfile);
3049 /* Age the cache, releasing compilation units that have not
3050 been used recently. */
3051 age_cached_comp_units ();
3053 do_cleanups (back_to);
3056 /* Load the DIEs associated with PER_CU into memory. */
3059 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3061 bfd *abfd = objfile->obfd;
3062 struct dwarf2_cu *cu;
3063 unsigned int offset;
3064 gdb_byte *info_ptr, *beg_of_comp_unit;
3065 struct cleanup *back_to, *free_cu_cleanup;
3066 struct attribute *attr;
3068 gdb_assert (! per_cu->from_debug_types);
3070 /* Set local variables from the partial symbol table info. */
3071 offset = per_cu->offset;
3073 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3074 info_ptr = dwarf2_per_objfile->info.buffer + offset;
3075 beg_of_comp_unit = info_ptr;
3077 cu = alloc_one_comp_unit (objfile);
3079 /* If an error occurs while loading, release our storage. */
3080 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3082 /* Read in the comp_unit header. */
3083 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
3085 /* Complete the cu_header. */
3086 cu->header.offset = offset;
3087 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3089 /* Read the abbrevs for this compilation unit. */
3090 dwarf2_read_abbrevs (abfd, cu);
3091 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
3093 /* Link this compilation unit into the compilation unit tree. */
3095 cu->per_cu = per_cu;
3096 cu->type_hash = per_cu->type_hash;
3098 cu->dies = read_comp_unit (info_ptr, cu);
3100 /* We try not to read any attributes in this function, because not
3101 all objfiles needed for references have been loaded yet, and symbol
3102 table processing isn't initialized. But we have to set the CU language,
3103 or we won't be able to build types correctly. */
3104 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
3106 set_cu_language (DW_UNSND (attr), cu);
3108 set_cu_language (language_minimal, cu);
3110 /* Similarly, if we do not read the producer, we can not apply
3111 producer-specific interpretation. */
3112 attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
3114 cu->producer = DW_STRING (attr);
3116 /* Link this CU into read_in_chain. */
3117 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3118 dwarf2_per_objfile->read_in_chain = per_cu;
3120 do_cleanups (back_to);
3122 /* We've successfully allocated this compilation unit. Let our caller
3123 clean it up when finished with it. */
3124 discard_cleanups (free_cu_cleanup);
3127 /* Generate full symbol information for PST and CU, whose DIEs have
3128 already been loaded into memory. */
3131 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
3133 struct partial_symtab *pst = per_cu->psymtab;
3134 struct dwarf2_cu *cu = per_cu->cu;
3135 struct objfile *objfile = pst->objfile;
3136 CORE_ADDR lowpc, highpc;
3137 struct symtab *symtab;
3138 struct cleanup *back_to;
3141 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3144 back_to = make_cleanup (really_free_pendings, NULL);
3146 cu->list_in_scope = &file_symbols;
3148 dwarf2_find_base_address (cu->dies, cu);
3150 /* Do line number decoding in read_file_scope () */
3151 process_die (cu->dies, cu);
3153 /* Some compilers don't define a DW_AT_high_pc attribute for the
3154 compilation unit. If the DW_AT_high_pc is missing, synthesize
3155 it, by scanning the DIE's below the compilation unit. */
3156 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
3158 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
3160 /* Set symtab language to language from DW_AT_language.
3161 If the compilation is from a C file generated by language preprocessors,
3162 do not set the language if it was already deduced by start_subfile. */
3164 && !(cu->language == language_c && symtab->language != language_c))
3166 symtab->language = cu->language;
3168 pst->symtab = symtab;
3171 do_cleanups (back_to);
3174 /* Process a die and its children. */
3177 process_die (struct die_info *die, struct dwarf2_cu *cu)
3181 case DW_TAG_padding:
3183 case DW_TAG_compile_unit:
3184 read_file_scope (die, cu);
3186 case DW_TAG_type_unit:
3187 read_type_unit_scope (die, cu);
3189 case DW_TAG_subprogram:
3190 case DW_TAG_inlined_subroutine:
3191 read_func_scope (die, cu);
3193 case DW_TAG_lexical_block:
3194 case DW_TAG_try_block:
3195 case DW_TAG_catch_block:
3196 read_lexical_block_scope (die, cu);
3198 case DW_TAG_class_type:
3199 case DW_TAG_interface_type:
3200 case DW_TAG_structure_type:
3201 case DW_TAG_union_type:
3202 process_structure_scope (die, cu);
3204 case DW_TAG_enumeration_type:
3205 process_enumeration_scope (die, cu);
3208 /* These dies have a type, but processing them does not create
3209 a symbol or recurse to process the children. Therefore we can
3210 read them on-demand through read_type_die. */
3211 case DW_TAG_subroutine_type:
3212 case DW_TAG_set_type:
3213 case DW_TAG_array_type:
3214 case DW_TAG_pointer_type:
3215 case DW_TAG_ptr_to_member_type:
3216 case DW_TAG_reference_type:
3217 case DW_TAG_string_type:
3220 case DW_TAG_base_type:
3221 case DW_TAG_subrange_type:
3222 case DW_TAG_typedef:
3223 case DW_TAG_const_type:
3224 case DW_TAG_volatile_type:
3225 /* Add a typedef symbol for the type definition, if it has a
3227 new_symbol (die, read_type_die (die, cu), cu);
3229 case DW_TAG_common_block:
3230 read_common_block (die, cu);
3232 case DW_TAG_common_inclusion:
3234 case DW_TAG_namespace:
3235 processing_has_namespace_info = 1;
3236 read_namespace (die, cu);
3239 processing_has_namespace_info = 1;
3240 read_module (die, cu);
3242 case DW_TAG_imported_declaration:
3243 case DW_TAG_imported_module:
3244 processing_has_namespace_info = 1;
3245 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
3246 || cu->language != language_fortran))
3247 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
3248 dwarf_tag_name (die->tag));
3249 read_import_statement (die, cu);
3252 new_symbol (die, NULL, cu);
3257 /* A helper function for dwarf2_compute_name which determines whether DIE
3258 needs to have the name of the scope prepended to the name listed in the
3262 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
3264 struct attribute *attr;
3268 case DW_TAG_namespace:
3269 case DW_TAG_typedef:
3270 case DW_TAG_class_type:
3271 case DW_TAG_interface_type:
3272 case DW_TAG_structure_type:
3273 case DW_TAG_union_type:
3274 case DW_TAG_enumeration_type:
3275 case DW_TAG_enumerator:
3276 case DW_TAG_subprogram:
3280 case DW_TAG_variable:
3281 /* We only need to prefix "globally" visible variables. These include
3282 any variable marked with DW_AT_external or any variable that
3283 lives in a namespace. [Variables in anonymous namespaces
3284 require prefixing, but they are not DW_AT_external.] */
3286 if (dwarf2_attr (die, DW_AT_specification, cu))
3288 struct dwarf2_cu *spec_cu = cu;
3290 return die_needs_namespace (die_specification (die, &spec_cu),
3294 attr = dwarf2_attr (die, DW_AT_external, cu);
3295 if (attr == NULL && die->parent->tag != DW_TAG_namespace
3296 && die->parent->tag != DW_TAG_module)
3298 /* A variable in a lexical block of some kind does not need a
3299 namespace, even though in C++ such variables may be external
3300 and have a mangled name. */
3301 if (die->parent->tag == DW_TAG_lexical_block
3302 || die->parent->tag == DW_TAG_try_block
3303 || die->parent->tag == DW_TAG_catch_block
3304 || die->parent->tag == DW_TAG_subprogram)
3313 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3314 compute the physname for the object, which include a method's
3315 formal parameters (C++/Java) and return type (Java).
3317 For Ada, return the DIE's linkage name rather than the fully qualified
3318 name. PHYSNAME is ignored..
3320 The result is allocated on the objfile_obstack and canonicalized. */
3323 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
3327 name = dwarf2_name (die, cu);
3329 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
3330 compute it by typename_concat inside GDB. */
3331 if (cu->language == language_ada
3332 || (cu->language == language_fortran && physname))
3334 /* For Ada unit, we prefer the linkage name over the name, as
3335 the former contains the exported name, which the user expects
3336 to be able to reference. Ideally, we want the user to be able
3337 to reference this entity using either natural or linkage name,
3338 but we haven't started looking at this enhancement yet. */
3339 struct attribute *attr;
3341 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
3343 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
3344 if (attr && DW_STRING (attr))
3345 return DW_STRING (attr);
3348 /* These are the only languages we know how to qualify names in. */
3350 && (cu->language == language_cplus || cu->language == language_java
3351 || cu->language == language_fortran))
3353 if (die_needs_namespace (die, cu))
3357 struct ui_file *buf;
3359 prefix = determine_prefix (die, cu);
3360 buf = mem_fileopen ();
3361 if (*prefix != '\0')
3363 char *prefixed_name = typename_concat (NULL, prefix, name,
3366 fputs_unfiltered (prefixed_name, buf);
3367 xfree (prefixed_name);
3370 fputs_unfiltered (name ? name : "", buf);
3372 /* For Java and C++ methods, append formal parameter type
3373 information, if PHYSNAME. */
3375 if (physname && die->tag == DW_TAG_subprogram
3376 && (cu->language == language_cplus
3377 || cu->language == language_java))
3379 struct type *type = read_type_die (die, cu);
3381 c_type_print_args (type, buf, 0, cu->language);
3383 if (cu->language == language_java)
3385 /* For java, we must append the return type to method
3387 if (die->tag == DW_TAG_subprogram)
3388 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
3391 else if (cu->language == language_cplus)
3393 if (TYPE_NFIELDS (type) > 0
3394 && TYPE_FIELD_ARTIFICIAL (type, 0)
3395 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0))))
3396 fputs_unfiltered (" const", buf);
3400 name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
3402 ui_file_delete (buf);
3404 if (cu->language == language_cplus)
3407 = dwarf2_canonicalize_name (name, cu,
3408 &cu->objfile->objfile_obstack);
3419 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3420 If scope qualifiers are appropriate they will be added. The result
3421 will be allocated on the objfile_obstack, or NULL if the DIE does
3422 not have a name. NAME may either be from a previous call to
3423 dwarf2_name or NULL.
3425 The output string will be canonicalized (if C++/Java). */
3428 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
3430 return dwarf2_compute_name (name, die, cu, 0);
3433 /* Construct a physname for the given DIE in CU. NAME may either be
3434 from a previous call to dwarf2_name or NULL. The result will be
3435 allocated on the objfile_objstack or NULL if the DIE does not have a
3438 The output string will be canonicalized (if C++/Java). */
3441 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
3443 return dwarf2_compute_name (name, die, cu, 1);
3446 /* Read the import statement specified by the given die and record it. */
3449 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
3451 struct attribute *import_attr;
3452 struct die_info *imported_die;
3453 struct dwarf2_cu *imported_cu;
3454 const char *imported_name;
3455 const char *imported_name_prefix;
3456 const char *canonical_name;
3457 const char *import_alias;
3458 const char *imported_declaration = NULL;
3459 const char *import_prefix;
3463 import_attr = dwarf2_attr (die, DW_AT_import, cu);
3464 if (import_attr == NULL)
3466 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
3467 dwarf_tag_name (die->tag));
3472 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
3473 imported_name = dwarf2_name (imported_die, imported_cu);
3474 if (imported_name == NULL)
3476 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3478 The import in the following code:
3492 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3493 <52> DW_AT_decl_file : 1
3494 <53> DW_AT_decl_line : 6
3495 <54> DW_AT_import : <0x75>
3496 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3498 <5b> DW_AT_decl_file : 1
3499 <5c> DW_AT_decl_line : 2
3500 <5d> DW_AT_type : <0x6e>
3502 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3503 <76> DW_AT_byte_size : 4
3504 <77> DW_AT_encoding : 5 (signed)
3506 imports the wrong die ( 0x75 instead of 0x58 ).
3507 This case will be ignored until the gcc bug is fixed. */
3511 /* Figure out the local name after import. */
3512 import_alias = dwarf2_name (die, cu);
3514 /* Figure out where the statement is being imported to. */
3515 import_prefix = determine_prefix (die, cu);
3517 /* Figure out what the scope of the imported die is and prepend it
3518 to the name of the imported die. */
3519 imported_name_prefix = determine_prefix (imported_die, imported_cu);
3521 if (imported_die->tag != DW_TAG_namespace
3522 && imported_die->tag != DW_TAG_module)
3524 imported_declaration = imported_name;
3525 canonical_name = imported_name_prefix;
3527 else if (strlen (imported_name_prefix) > 0)
3529 temp = alloca (strlen (imported_name_prefix)
3530 + 2 + strlen (imported_name) + 1);
3531 strcpy (temp, imported_name_prefix);
3532 strcat (temp, "::");
3533 strcat (temp, imported_name);
3534 canonical_name = temp;
3537 canonical_name = imported_name;
3539 cp_add_using_directive (import_prefix,
3542 imported_declaration,
3543 &cu->objfile->objfile_obstack);
3547 initialize_cu_func_list (struct dwarf2_cu *cu)
3549 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
3553 free_cu_line_header (void *arg)
3555 struct dwarf2_cu *cu = arg;
3557 free_line_header (cu->line_header);
3558 cu->line_header = NULL;
3562 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
3564 struct objfile *objfile = cu->objfile;
3565 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3566 CORE_ADDR lowpc = ((CORE_ADDR) -1);
3567 CORE_ADDR highpc = ((CORE_ADDR) 0);
3568 struct attribute *attr;
3570 char *comp_dir = NULL;
3571 struct die_info *child_die;
3572 bfd *abfd = objfile->obfd;
3573 struct line_header *line_header = 0;
3576 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3578 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
3580 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3581 from finish_block. */
3582 if (lowpc == ((CORE_ADDR) -1))
3587 /* Find the filename. Do not use dwarf2_name here, since the filename
3588 is not a source language identifier. */
3589 attr = dwarf2_attr (die, DW_AT_name, cu);
3592 name = DW_STRING (attr);
3595 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3597 comp_dir = DW_STRING (attr);
3598 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3600 comp_dir = ldirname (name);
3601 if (comp_dir != NULL)
3602 make_cleanup (xfree, comp_dir);
3604 if (comp_dir != NULL)
3606 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3607 directory, get rid of it. */
3608 char *cp = strchr (comp_dir, ':');
3610 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
3617 attr = dwarf2_attr (die, DW_AT_language, cu);
3620 set_cu_language (DW_UNSND (attr), cu);
3623 attr = dwarf2_attr (die, DW_AT_producer, cu);
3625 cu->producer = DW_STRING (attr);
3627 /* We assume that we're processing GCC output. */
3628 processing_gcc_compilation = 2;
3630 processing_has_namespace_info = 0;
3632 start_symtab (name, comp_dir, lowpc);
3633 record_debugformat ("DWARF 2");
3634 record_producer (cu->producer);
3636 initialize_cu_func_list (cu);
3638 /* Decode line number information if present. We do this before
3639 processing child DIEs, so that the line header table is available
3640 for DW_AT_decl_file. */
3641 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
3644 unsigned int line_offset = DW_UNSND (attr);
3645 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
3648 cu->line_header = line_header;
3649 make_cleanup (free_cu_line_header, cu);
3650 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
3654 /* Process all dies in compilation unit. */
3655 if (die->child != NULL)
3657 child_die = die->child;
3658 while (child_die && child_die->tag)
3660 process_die (child_die, cu);
3661 child_die = sibling_die (child_die);
3665 /* Decode macro information, if present. Dwarf 2 macro information
3666 refers to information in the line number info statement program
3667 header, so we can only read it if we've read the header
3669 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
3670 if (attr && line_header)
3672 unsigned int macro_offset = DW_UNSND (attr);
3674 dwarf_decode_macros (line_header, macro_offset,
3675 comp_dir, abfd, cu);
3677 do_cleanups (back_to);
3680 /* For TUs we want to skip the first top level sibling if it's not the
3681 actual type being defined by this TU. In this case the first top
3682 level sibling is there to provide context only. */
3685 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
3687 struct objfile *objfile = cu->objfile;
3688 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3690 struct attribute *attr;
3692 char *comp_dir = NULL;
3693 struct die_info *child_die;
3694 bfd *abfd = objfile->obfd;
3696 /* start_symtab needs a low pc, but we don't really have one.
3697 Do what read_file_scope would do in the absence of such info. */
3698 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3700 /* Find the filename. Do not use dwarf2_name here, since the filename
3701 is not a source language identifier. */
3702 attr = dwarf2_attr (die, DW_AT_name, cu);
3704 name = DW_STRING (attr);
3706 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3708 comp_dir = DW_STRING (attr);
3709 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3711 comp_dir = ldirname (name);
3712 if (comp_dir != NULL)
3713 make_cleanup (xfree, comp_dir);
3719 attr = dwarf2_attr (die, DW_AT_language, cu);
3721 set_cu_language (DW_UNSND (attr), cu);
3723 /* This isn't technically needed today. It is done for symmetry
3724 with read_file_scope. */
3725 attr = dwarf2_attr (die, DW_AT_producer, cu);
3727 cu->producer = DW_STRING (attr);
3729 /* We assume that we're processing GCC output. */
3730 processing_gcc_compilation = 2;
3732 processing_has_namespace_info = 0;
3734 start_symtab (name, comp_dir, lowpc);
3735 record_debugformat ("DWARF 2");
3736 record_producer (cu->producer);
3738 /* Process the dies in the type unit. */
3739 if (die->child == NULL)
3741 dump_die_for_error (die);
3742 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3743 bfd_get_filename (abfd));
3746 child_die = die->child;
3748 while (child_die && child_die->tag)
3750 process_die (child_die, cu);
3752 child_die = sibling_die (child_die);
3755 do_cleanups (back_to);
3759 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
3760 struct dwarf2_cu *cu)
3762 struct function_range *thisfn;
3764 thisfn = (struct function_range *)
3765 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
3766 thisfn->name = name;
3767 thisfn->lowpc = lowpc;
3768 thisfn->highpc = highpc;
3769 thisfn->seen_line = 0;
3770 thisfn->next = NULL;
3772 if (cu->last_fn == NULL)
3773 cu->first_fn = thisfn;
3775 cu->last_fn->next = thisfn;
3777 cu->last_fn = thisfn;
3780 /* qsort helper for inherit_abstract_dies. */
3783 unsigned_int_compar (const void *ap, const void *bp)
3785 unsigned int a = *(unsigned int *) ap;
3786 unsigned int b = *(unsigned int *) bp;
3788 return (a > b) - (b > a);
3791 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3792 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3793 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3796 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
3798 struct die_info *child_die;
3799 unsigned die_children_count;
3800 /* CU offsets which were referenced by children of the current DIE. */
3802 unsigned *offsets_end, *offsetp;
3803 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3804 struct die_info *origin_die;
3805 /* Iterator of the ORIGIN_DIE children. */
3806 struct die_info *origin_child_die;
3807 struct cleanup *cleanups;
3808 struct attribute *attr;
3810 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
3814 origin_die = follow_die_ref (die, attr, &cu);
3815 if (die->tag != origin_die->tag
3816 && !(die->tag == DW_TAG_inlined_subroutine
3817 && origin_die->tag == DW_TAG_subprogram))
3818 complaint (&symfile_complaints,
3819 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3820 die->offset, origin_die->offset);
3822 child_die = die->child;
3823 die_children_count = 0;
3824 while (child_die && child_die->tag)
3826 child_die = sibling_die (child_die);
3827 die_children_count++;
3829 offsets = xmalloc (sizeof (*offsets) * die_children_count);
3830 cleanups = make_cleanup (xfree, offsets);
3832 offsets_end = offsets;
3833 child_die = die->child;
3834 while (child_die && child_die->tag)
3836 /* For each CHILD_DIE, find the corresponding child of
3837 ORIGIN_DIE. If there is more than one layer of
3838 DW_AT_abstract_origin, follow them all; there shouldn't be,
3839 but GCC versions at least through 4.4 generate this (GCC PR
3841 struct die_info *child_origin_die = child_die;
3845 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
3848 child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
3851 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3852 counterpart may exist. */
3853 if (child_origin_die != child_die)
3855 if (child_die->tag != child_origin_die->tag
3856 && !(child_die->tag == DW_TAG_inlined_subroutine
3857 && child_origin_die->tag == DW_TAG_subprogram))
3858 complaint (&symfile_complaints,
3859 _("Child DIE 0x%x and its abstract origin 0x%x have "
3860 "different tags"), child_die->offset,
3861 child_origin_die->offset);
3862 if (child_origin_die->parent != origin_die)
3863 complaint (&symfile_complaints,
3864 _("Child DIE 0x%x and its abstract origin 0x%x have "
3865 "different parents"), child_die->offset,
3866 child_origin_die->offset);
3868 *offsets_end++ = child_origin_die->offset;
3870 child_die = sibling_die (child_die);
3872 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
3873 unsigned_int_compar);
3874 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
3875 if (offsetp[-1] == *offsetp)
3876 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
3877 "to DIE 0x%x as their abstract origin"),
3878 die->offset, *offsetp);
3881 origin_child_die = origin_die->child;
3882 while (origin_child_die && origin_child_die->tag)
3884 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3885 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
3887 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
3889 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3890 process_die (origin_child_die, cu);
3892 origin_child_die = sibling_die (origin_child_die);
3895 do_cleanups (cleanups);
3899 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
3901 struct objfile *objfile = cu->objfile;
3902 struct context_stack *new;
3905 struct die_info *child_die;
3906 struct attribute *attr, *call_line, *call_file;
3909 struct block *block;
3910 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
3914 /* If we do not have call site information, we can't show the
3915 caller of this inlined function. That's too confusing, so
3916 only use the scope for local variables. */
3917 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
3918 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
3919 if (call_line == NULL || call_file == NULL)
3921 read_lexical_block_scope (die, cu);
3926 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3928 name = dwarf2_name (die, cu);
3930 /* Ignore functions with missing or empty names. These are actually
3931 illegal according to the DWARF standard. */
3934 complaint (&symfile_complaints,
3935 _("missing name for subprogram DIE at %d"), die->offset);
3939 /* Ignore functions with missing or invalid low and high pc attributes. */
3940 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3942 attr = dwarf2_attr (die, DW_AT_external, cu);
3943 if (!attr || !DW_UNSND (attr))
3944 complaint (&symfile_complaints,
3945 _("cannot get low and high bounds for subprogram DIE at %d"),
3953 /* Record the function range for dwarf_decode_lines. */
3954 add_to_cu_func_list (name, lowpc, highpc, cu);
3956 new = push_context (0, lowpc);
3957 new->name = new_symbol (die, read_type_die (die, cu), cu);
3959 /* If there is a location expression for DW_AT_frame_base, record
3961 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
3963 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3964 expression is being recorded directly in the function's symbol
3965 and not in a separate frame-base object. I guess this hack is
3966 to avoid adding some sort of frame-base adjunct/annex to the
3967 function's symbol :-(. The problem with doing this is that it
3968 results in a function symbol with a location expression that
3969 has nothing to do with the location of the function, ouch! The
3970 relationship should be: a function's symbol has-a frame base; a
3971 frame-base has-a location expression. */
3972 dwarf2_symbol_mark_computed (attr, new->name, cu);
3974 cu->list_in_scope = &local_symbols;
3976 if (die->child != NULL)
3978 child_die = die->child;
3979 while (child_die && child_die->tag)
3981 process_die (child_die, cu);
3982 child_die = sibling_die (child_die);
3986 inherit_abstract_dies (die, cu);
3988 /* If we have a DW_AT_specification, we might need to import using
3989 directives from the context of the specification DIE. See the
3990 comment in determine_prefix. */
3991 if (cu->language == language_cplus
3992 && dwarf2_attr (die, DW_AT_specification, cu))
3994 struct dwarf2_cu *spec_cu = cu;
3995 struct die_info *spec_die = die_specification (die, &spec_cu);
3999 child_die = spec_die->child;
4000 while (child_die && child_die->tag)
4002 if (child_die->tag == DW_TAG_imported_module)
4003 process_die (child_die, spec_cu);
4004 child_die = sibling_die (child_die);
4007 /* In some cases, GCC generates specification DIEs that
4008 themselves contain DW_AT_specification attributes. */
4009 spec_die = die_specification (spec_die, &spec_cu);
4013 new = pop_context ();
4014 /* Make a block for the local symbols within. */
4015 block = finish_block (new->name, &local_symbols, new->old_blocks,
4016 lowpc, highpc, objfile);
4018 /* For C++, set the block's scope. */
4019 if (cu->language == language_cplus || cu->language == language_fortran)
4020 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
4021 determine_prefix (die, cu),
4022 processing_has_namespace_info);
4024 /* If we have address ranges, record them. */
4025 dwarf2_record_block_ranges (die, block, baseaddr, cu);
4027 /* In C++, we can have functions nested inside functions (e.g., when
4028 a function declares a class that has methods). This means that
4029 when we finish processing a function scope, we may need to go
4030 back to building a containing block's symbol lists. */
4031 local_symbols = new->locals;
4032 param_symbols = new->params;
4033 using_directives = new->using_directives;
4035 /* If we've finished processing a top-level function, subsequent
4036 symbols go in the file symbol list. */
4037 if (outermost_context_p ())
4038 cu->list_in_scope = &file_symbols;
4041 /* Process all the DIES contained within a lexical block scope. Start
4042 a new scope, process the dies, and then close the scope. */
4045 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
4047 struct objfile *objfile = cu->objfile;
4048 struct context_stack *new;
4049 CORE_ADDR lowpc, highpc;
4050 struct die_info *child_die;
4053 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4055 /* Ignore blocks with missing or invalid low and high pc attributes. */
4056 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4057 as multiple lexical blocks? Handling children in a sane way would
4058 be nasty. Might be easier to properly extend generic blocks to
4060 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
4065 push_context (0, lowpc);
4066 if (die->child != NULL)
4068 child_die = die->child;
4069 while (child_die && child_die->tag)
4071 process_die (child_die, cu);
4072 child_die = sibling_die (child_die);
4075 new = pop_context ();
4077 if (local_symbols != NULL || using_directives != NULL)
4080 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
4083 /* Note that recording ranges after traversing children, as we
4084 do here, means that recording a parent's ranges entails
4085 walking across all its children's ranges as they appear in
4086 the address map, which is quadratic behavior.
4088 It would be nicer to record the parent's ranges before
4089 traversing its children, simply overriding whatever you find
4090 there. But since we don't even decide whether to create a
4091 block until after we've traversed its children, that's hard
4093 dwarf2_record_block_ranges (die, block, baseaddr, cu);
4095 local_symbols = new->locals;
4096 using_directives = new->using_directives;
4099 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4100 Return 1 if the attributes are present and valid, otherwise, return 0.
4101 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4104 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
4105 CORE_ADDR *high_return, struct dwarf2_cu *cu,
4106 struct partial_symtab *ranges_pst)
4108 struct objfile *objfile = cu->objfile;
4109 struct comp_unit_head *cu_header = &cu->header;
4110 bfd *obfd = objfile->obfd;
4111 unsigned int addr_size = cu_header->addr_size;
4112 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4113 /* Base address selection entry. */
4124 found_base = cu->base_known;
4125 base = cu->base_address;
4127 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
4128 if (offset >= dwarf2_per_objfile->ranges.size)
4130 complaint (&symfile_complaints,
4131 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4135 buffer = dwarf2_per_objfile->ranges.buffer + offset;
4137 /* Read in the largest possible address. */
4138 marker = read_address (obfd, buffer, cu, &dummy);
4139 if ((marker & mask) == mask)
4141 /* If we found the largest possible address, then
4142 read the base address. */
4143 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4144 buffer += 2 * addr_size;
4145 offset += 2 * addr_size;
4151 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4155 CORE_ADDR range_beginning, range_end;
4157 range_beginning = read_address (obfd, buffer, cu, &dummy);
4158 buffer += addr_size;
4159 range_end = read_address (obfd, buffer, cu, &dummy);
4160 buffer += addr_size;
4161 offset += 2 * addr_size;
4163 /* An end of list marker is a pair of zero addresses. */
4164 if (range_beginning == 0 && range_end == 0)
4165 /* Found the end of list entry. */
4168 /* Each base address selection entry is a pair of 2 values.
4169 The first is the largest possible address, the second is
4170 the base address. Check for a base address here. */
4171 if ((range_beginning & mask) == mask)
4173 /* If we found the largest possible address, then
4174 read the base address. */
4175 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4182 /* We have no valid base address for the ranges
4184 complaint (&symfile_complaints,
4185 _("Invalid .debug_ranges data (no base address)"));
4189 range_beginning += base;
4192 if (ranges_pst != NULL && range_beginning < range_end)
4193 addrmap_set_empty (objfile->psymtabs_addrmap,
4194 range_beginning + baseaddr, range_end - 1 + baseaddr,
4197 /* FIXME: This is recording everything as a low-high
4198 segment of consecutive addresses. We should have a
4199 data structure for discontiguous block ranges
4203 low = range_beginning;
4209 if (range_beginning < low)
4210 low = range_beginning;
4211 if (range_end > high)
4217 /* If the first entry is an end-of-list marker, the range
4218 describes an empty scope, i.e. no instructions. */
4224 *high_return = high;
4228 /* Get low and high pc attributes from a die. Return 1 if the attributes
4229 are present and valid, otherwise, return 0. Return -1 if the range is
4230 discontinuous, i.e. derived from DW_AT_ranges information. */
4232 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
4233 CORE_ADDR *highpc, struct dwarf2_cu *cu,
4234 struct partial_symtab *pst)
4236 struct attribute *attr;
4241 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4244 high = DW_ADDR (attr);
4245 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4247 low = DW_ADDR (attr);
4249 /* Found high w/o low attribute. */
4252 /* Found consecutive range of addresses. */
4257 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4260 /* Value of the DW_AT_ranges attribute is the offset in the
4261 .debug_ranges section. */
4262 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
4264 /* Found discontinuous range of addresses. */
4272 /* When using the GNU linker, .gnu.linkonce. sections are used to
4273 eliminate duplicate copies of functions and vtables and such.
4274 The linker will arbitrarily choose one and discard the others.
4275 The AT_*_pc values for such functions refer to local labels in
4276 these sections. If the section from that file was discarded, the
4277 labels are not in the output, so the relocs get a value of 0.
4278 If this is a discarded function, mark the pc bounds as invalid,
4279 so that GDB will ignore it. */
4280 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
4288 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4289 its low and high PC addresses. Do nothing if these addresses could not
4290 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4291 and HIGHPC to the high address if greater than HIGHPC. */
4294 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
4295 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4296 struct dwarf2_cu *cu)
4298 CORE_ADDR low, high;
4299 struct die_info *child = die->child;
4301 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
4303 *lowpc = min (*lowpc, low);
4304 *highpc = max (*highpc, high);
4307 /* If the language does not allow nested subprograms (either inside
4308 subprograms or lexical blocks), we're done. */
4309 if (cu->language != language_ada)
4312 /* Check all the children of the given DIE. If it contains nested
4313 subprograms, then check their pc bounds. Likewise, we need to
4314 check lexical blocks as well, as they may also contain subprogram
4316 while (child && child->tag)
4318 if (child->tag == DW_TAG_subprogram
4319 || child->tag == DW_TAG_lexical_block)
4320 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
4321 child = sibling_die (child);
4325 /* Get the low and high pc's represented by the scope DIE, and store
4326 them in *LOWPC and *HIGHPC. If the correct values can't be
4327 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4330 get_scope_pc_bounds (struct die_info *die,
4331 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4332 struct dwarf2_cu *cu)
4334 CORE_ADDR best_low = (CORE_ADDR) -1;
4335 CORE_ADDR best_high = (CORE_ADDR) 0;
4336 CORE_ADDR current_low, current_high;
4338 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
4340 best_low = current_low;
4341 best_high = current_high;
4345 struct die_info *child = die->child;
4347 while (child && child->tag)
4349 switch (child->tag) {
4350 case DW_TAG_subprogram:
4351 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
4353 case DW_TAG_namespace:
4355 /* FIXME: carlton/2004-01-16: Should we do this for
4356 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4357 that current GCC's always emit the DIEs corresponding
4358 to definitions of methods of classes as children of a
4359 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4360 the DIEs giving the declarations, which could be
4361 anywhere). But I don't see any reason why the
4362 standards says that they have to be there. */
4363 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
4365 if (current_low != ((CORE_ADDR) -1))
4367 best_low = min (best_low, current_low);
4368 best_high = max (best_high, current_high);
4376 child = sibling_die (child);
4381 *highpc = best_high;
4384 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4387 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
4388 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
4390 struct attribute *attr;
4392 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4395 CORE_ADDR high = DW_ADDR (attr);
4397 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4400 CORE_ADDR low = DW_ADDR (attr);
4402 record_block_range (block, baseaddr + low, baseaddr + high - 1);
4406 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4409 bfd *obfd = cu->objfile->obfd;
4411 /* The value of the DW_AT_ranges attribute is the offset of the
4412 address range list in the .debug_ranges section. */
4413 unsigned long offset = DW_UNSND (attr);
4414 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
4416 /* For some target architectures, but not others, the
4417 read_address function sign-extends the addresses it returns.
4418 To recognize base address selection entries, we need a
4420 unsigned int addr_size = cu->header.addr_size;
4421 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4423 /* The base address, to which the next pair is relative. Note
4424 that this 'base' is a DWARF concept: most entries in a range
4425 list are relative, to reduce the number of relocs against the
4426 debugging information. This is separate from this function's
4427 'baseaddr' argument, which GDB uses to relocate debugging
4428 information from a shared library based on the address at
4429 which the library was loaded. */
4430 CORE_ADDR base = cu->base_address;
4431 int base_known = cu->base_known;
4433 gdb_assert (dwarf2_per_objfile->ranges.readin);
4434 if (offset >= dwarf2_per_objfile->ranges.size)
4436 complaint (&symfile_complaints,
4437 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4444 unsigned int bytes_read;
4445 CORE_ADDR start, end;
4447 start = read_address (obfd, buffer, cu, &bytes_read);
4448 buffer += bytes_read;
4449 end = read_address (obfd, buffer, cu, &bytes_read);
4450 buffer += bytes_read;
4452 /* Did we find the end of the range list? */
4453 if (start == 0 && end == 0)
4456 /* Did we find a base address selection entry? */
4457 else if ((start & base_select_mask) == base_select_mask)
4463 /* We found an ordinary address range. */
4468 complaint (&symfile_complaints,
4469 _("Invalid .debug_ranges data (no base address)"));
4473 record_block_range (block,
4474 baseaddr + base + start,
4475 baseaddr + base + end - 1);
4481 /* Add an aggregate field to the field list. */
4484 dwarf2_add_field (struct field_info *fip, struct die_info *die,
4485 struct dwarf2_cu *cu)
4487 struct objfile *objfile = cu->objfile;
4488 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4489 struct nextfield *new_field;
4490 struct attribute *attr;
4492 char *fieldname = "";
4494 /* Allocate a new field list entry and link it in. */
4495 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4496 make_cleanup (xfree, new_field);
4497 memset (new_field, 0, sizeof (struct nextfield));
4499 if (die->tag == DW_TAG_inheritance)
4501 new_field->next = fip->baseclasses;
4502 fip->baseclasses = new_field;
4506 new_field->next = fip->fields;
4507 fip->fields = new_field;
4511 /* Handle accessibility and virtuality of field.
4512 The default accessibility for members is public, the default
4513 accessibility for inheritance is private. */
4514 if (die->tag != DW_TAG_inheritance)
4515 new_field->accessibility = DW_ACCESS_public;
4517 new_field->accessibility = DW_ACCESS_private;
4518 new_field->virtuality = DW_VIRTUALITY_none;
4520 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4522 new_field->accessibility = DW_UNSND (attr);
4523 if (new_field->accessibility != DW_ACCESS_public)
4524 fip->non_public_fields = 1;
4525 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4527 new_field->virtuality = DW_UNSND (attr);
4529 fp = &new_field->field;
4531 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
4533 /* Data member other than a C++ static data member. */
4535 /* Get type of field. */
4536 fp->type = die_type (die, cu);
4538 SET_FIELD_BITPOS (*fp, 0);
4540 /* Get bit size of field (zero if none). */
4541 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
4544 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
4548 FIELD_BITSIZE (*fp) = 0;
4551 /* Get bit offset of field. */
4552 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4555 int byte_offset = 0;
4557 if (attr_form_is_section_offset (attr))
4558 dwarf2_complex_location_expr_complaint ();
4559 else if (attr_form_is_constant (attr))
4560 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4561 else if (attr_form_is_block (attr))
4562 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4564 dwarf2_complex_location_expr_complaint ();
4566 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4568 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
4571 if (gdbarch_bits_big_endian (gdbarch))
4573 /* For big endian bits, the DW_AT_bit_offset gives the
4574 additional bit offset from the MSB of the containing
4575 anonymous object to the MSB of the field. We don't
4576 have to do anything special since we don't need to
4577 know the size of the anonymous object. */
4578 FIELD_BITPOS (*fp) += DW_UNSND (attr);
4582 /* For little endian bits, compute the bit offset to the
4583 MSB of the anonymous object, subtract off the number of
4584 bits from the MSB of the field to the MSB of the
4585 object, and then subtract off the number of bits of
4586 the field itself. The result is the bit offset of
4587 the LSB of the field. */
4589 int bit_offset = DW_UNSND (attr);
4591 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4594 /* The size of the anonymous object containing
4595 the bit field is explicit, so use the
4596 indicated size (in bytes). */
4597 anonymous_size = DW_UNSND (attr);
4601 /* The size of the anonymous object containing
4602 the bit field must be inferred from the type
4603 attribute of the data member containing the
4605 anonymous_size = TYPE_LENGTH (fp->type);
4607 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
4608 - bit_offset - FIELD_BITSIZE (*fp);
4612 /* Get name of field. */
4613 fieldname = dwarf2_name (die, cu);
4614 if (fieldname == NULL)
4617 /* The name is already allocated along with this objfile, so we don't
4618 need to duplicate it for the type. */
4619 fp->name = fieldname;
4621 /* Change accessibility for artificial fields (e.g. virtual table
4622 pointer or virtual base class pointer) to private. */
4623 if (dwarf2_attr (die, DW_AT_artificial, cu))
4625 FIELD_ARTIFICIAL (*fp) = 1;
4626 new_field->accessibility = DW_ACCESS_private;
4627 fip->non_public_fields = 1;
4630 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
4632 /* C++ static member. */
4634 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4635 is a declaration, but all versions of G++ as of this writing
4636 (so through at least 3.2.1) incorrectly generate
4637 DW_TAG_variable tags. */
4641 /* Get name of field. */
4642 fieldname = dwarf2_name (die, cu);
4643 if (fieldname == NULL)
4646 /* Get physical name. */
4647 physname = (char *) dwarf2_physname (fieldname, die, cu);
4649 /* The name is already allocated along with this objfile, so we don't
4650 need to duplicate it for the type. */
4651 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
4652 FIELD_TYPE (*fp) = die_type (die, cu);
4653 FIELD_NAME (*fp) = fieldname;
4655 else if (die->tag == DW_TAG_inheritance)
4657 /* C++ base class field. */
4658 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4661 int byte_offset = 0;
4663 if (attr_form_is_section_offset (attr))
4664 dwarf2_complex_location_expr_complaint ();
4665 else if (attr_form_is_constant (attr))
4666 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4667 else if (attr_form_is_block (attr))
4668 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4670 dwarf2_complex_location_expr_complaint ();
4672 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4674 FIELD_BITSIZE (*fp) = 0;
4675 FIELD_TYPE (*fp) = die_type (die, cu);
4676 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
4677 fip->nbaseclasses++;
4681 /* Add a typedef defined in the scope of the FIP's class. */
4684 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
4685 struct dwarf2_cu *cu)
4687 struct objfile *objfile = cu->objfile;
4688 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4689 struct typedef_field_list *new_field;
4690 struct attribute *attr;
4691 struct typedef_field *fp;
4692 char *fieldname = "";
4694 /* Allocate a new field list entry and link it in. */
4695 new_field = xzalloc (sizeof (*new_field));
4696 make_cleanup (xfree, new_field);
4698 gdb_assert (die->tag == DW_TAG_typedef);
4700 fp = &new_field->field;
4702 /* Get name of field. */
4703 fp->name = dwarf2_name (die, cu);
4704 if (fp->name == NULL)
4707 fp->type = read_type_die (die, cu);
4709 new_field->next = fip->typedef_field_list;
4710 fip->typedef_field_list = new_field;
4711 fip->typedef_field_list_count++;
4714 /* Create the vector of fields, and attach it to the type. */
4717 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
4718 struct dwarf2_cu *cu)
4720 int nfields = fip->nfields;
4722 /* Record the field count, allocate space for the array of fields,
4723 and create blank accessibility bitfields if necessary. */
4724 TYPE_NFIELDS (type) = nfields;
4725 TYPE_FIELDS (type) = (struct field *)
4726 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4727 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4729 if (fip->non_public_fields && cu->language != language_ada)
4731 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4733 TYPE_FIELD_PRIVATE_BITS (type) =
4734 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4735 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4737 TYPE_FIELD_PROTECTED_BITS (type) =
4738 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4739 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4741 TYPE_FIELD_IGNORE_BITS (type) =
4742 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4743 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4746 /* If the type has baseclasses, allocate and clear a bit vector for
4747 TYPE_FIELD_VIRTUAL_BITS. */
4748 if (fip->nbaseclasses && cu->language != language_ada)
4750 int num_bytes = B_BYTES (fip->nbaseclasses);
4751 unsigned char *pointer;
4753 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4754 pointer = TYPE_ALLOC (type, num_bytes);
4755 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
4756 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
4757 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
4760 /* Copy the saved-up fields into the field vector. Start from the head
4761 of the list, adding to the tail of the field array, so that they end
4762 up in the same order in the array in which they were added to the list. */
4763 while (nfields-- > 0)
4765 struct nextfield *fieldp;
4769 fieldp = fip->fields;
4770 fip->fields = fieldp->next;
4774 fieldp = fip->baseclasses;
4775 fip->baseclasses = fieldp->next;
4778 TYPE_FIELD (type, nfields) = fieldp->field;
4779 switch (fieldp->accessibility)
4781 case DW_ACCESS_private:
4782 if (cu->language != language_ada)
4783 SET_TYPE_FIELD_PRIVATE (type, nfields);
4786 case DW_ACCESS_protected:
4787 if (cu->language != language_ada)
4788 SET_TYPE_FIELD_PROTECTED (type, nfields);
4791 case DW_ACCESS_public:
4795 /* Unknown accessibility. Complain and treat it as public. */
4797 complaint (&symfile_complaints, _("unsupported accessibility %d"),
4798 fieldp->accessibility);
4802 if (nfields < fip->nbaseclasses)
4804 switch (fieldp->virtuality)
4806 case DW_VIRTUALITY_virtual:
4807 case DW_VIRTUALITY_pure_virtual:
4808 if (cu->language == language_ada)
4809 error ("unexpected virtuality in component of Ada type");
4810 SET_TYPE_FIELD_VIRTUAL (type, nfields);
4817 /* Add a member function to the proper fieldlist. */
4820 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
4821 struct type *type, struct dwarf2_cu *cu)
4823 struct objfile *objfile = cu->objfile;
4824 struct attribute *attr;
4825 struct fnfieldlist *flp;
4827 struct fn_field *fnp;
4830 struct nextfnfield *new_fnfield;
4831 struct type *this_type;
4833 if (cu->language == language_ada)
4834 error ("unexpected member function in Ada type");
4836 /* Get name of member function. */
4837 fieldname = dwarf2_name (die, cu);
4838 if (fieldname == NULL)
4841 /* Get the mangled name. */
4842 physname = (char *) dwarf2_physname (fieldname, die, cu);
4844 /* Look up member function name in fieldlist. */
4845 for (i = 0; i < fip->nfnfields; i++)
4847 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
4851 /* Create new list element if necessary. */
4852 if (i < fip->nfnfields)
4853 flp = &fip->fnfieldlists[i];
4856 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
4858 fip->fnfieldlists = (struct fnfieldlist *)
4859 xrealloc (fip->fnfieldlists,
4860 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
4861 * sizeof (struct fnfieldlist));
4862 if (fip->nfnfields == 0)
4863 make_cleanup (free_current_contents, &fip->fnfieldlists);
4865 flp = &fip->fnfieldlists[fip->nfnfields];
4866 flp->name = fieldname;
4872 /* Create a new member function field and chain it to the field list
4874 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
4875 make_cleanup (xfree, new_fnfield);
4876 memset (new_fnfield, 0, sizeof (struct nextfnfield));
4877 new_fnfield->next = flp->head;
4878 flp->head = new_fnfield;
4881 /* Fill in the member function field info. */
4882 fnp = &new_fnfield->fnfield;
4883 /* The name is already allocated along with this objfile, so we don't
4884 need to duplicate it for the type. */
4885 fnp->physname = physname ? physname : "";
4886 fnp->type = alloc_type (objfile);
4887 this_type = read_type_die (die, cu);
4888 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
4890 int nparams = TYPE_NFIELDS (this_type);
4892 /* TYPE is the domain of this method, and THIS_TYPE is the type
4893 of the method itself (TYPE_CODE_METHOD). */
4894 smash_to_method_type (fnp->type, type,
4895 TYPE_TARGET_TYPE (this_type),
4896 TYPE_FIELDS (this_type),
4897 TYPE_NFIELDS (this_type),
4898 TYPE_VARARGS (this_type));
4900 /* Handle static member functions.
4901 Dwarf2 has no clean way to discern C++ static and non-static
4902 member functions. G++ helps GDB by marking the first
4903 parameter for non-static member functions (which is the
4904 this pointer) as artificial. We obtain this information
4905 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4906 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
4907 fnp->voffset = VOFFSET_STATIC;
4910 complaint (&symfile_complaints, _("member function type missing for '%s'"),
4913 /* Get fcontext from DW_AT_containing_type if present. */
4914 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4915 fnp->fcontext = die_containing_type (die, cu);
4917 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4918 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4920 /* Get accessibility. */
4921 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4924 switch (DW_UNSND (attr))
4926 case DW_ACCESS_private:
4927 fnp->is_private = 1;
4929 case DW_ACCESS_protected:
4930 fnp->is_protected = 1;
4935 /* Check for artificial methods. */
4936 attr = dwarf2_attr (die, DW_AT_artificial, cu);
4937 if (attr && DW_UNSND (attr) != 0)
4938 fnp->is_artificial = 1;
4940 /* Get index in virtual function table if it is a virtual member
4941 function. For older versions of GCC, this is an offset in the
4942 appropriate virtual table, as specified by DW_AT_containing_type.
4943 For everyone else, it is an expression to be evaluated relative
4944 to the object address. */
4946 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
4949 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
4951 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
4953 /* Old-style GCC. */
4954 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
4956 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
4957 || (DW_BLOCK (attr)->size > 1
4958 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
4959 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
4961 struct dwarf_block blk;
4964 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
4966 blk.size = DW_BLOCK (attr)->size - offset;
4967 blk.data = DW_BLOCK (attr)->data + offset;
4968 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
4969 if ((fnp->voffset % cu->header.addr_size) != 0)
4970 dwarf2_complex_location_expr_complaint ();
4972 fnp->voffset /= cu->header.addr_size;
4976 dwarf2_complex_location_expr_complaint ();
4979 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
4981 else if (attr_form_is_section_offset (attr))
4983 dwarf2_complex_location_expr_complaint ();
4987 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4993 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4994 if (attr && DW_UNSND (attr))
4996 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4997 complaint (&symfile_complaints,
4998 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4999 fieldname, die->offset);
5000 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5001 TYPE_CPLUS_DYNAMIC (type) = 1;
5006 /* Create the vector of member function fields, and attach it to the type. */
5009 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
5010 struct dwarf2_cu *cu)
5012 struct fnfieldlist *flp;
5013 int total_length = 0;
5016 if (cu->language == language_ada)
5017 error ("unexpected member functions in Ada type");
5019 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5020 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
5021 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
5023 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
5025 struct nextfnfield *nfp = flp->head;
5026 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
5029 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
5030 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
5031 fn_flp->fn_fields = (struct fn_field *)
5032 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
5033 for (k = flp->length; (k--, nfp); nfp = nfp->next)
5034 fn_flp->fn_fields[k] = nfp->fnfield;
5036 total_length += flp->length;
5039 TYPE_NFN_FIELDS (type) = fip->nfnfields;
5040 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
5043 /* Returns non-zero if NAME is the name of a vtable member in CU's
5044 language, zero otherwise. */
5046 is_vtable_name (const char *name, struct dwarf2_cu *cu)
5048 static const char vptr[] = "_vptr";
5049 static const char vtable[] = "vtable";
5051 /* Look for the C++ and Java forms of the vtable. */
5052 if ((cu->language == language_java
5053 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
5054 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
5055 && is_cplus_marker (name[sizeof (vptr) - 1])))
5061 /* GCC outputs unnamed structures that are really pointers to member
5062 functions, with the ABI-specified layout. If TYPE describes
5063 such a structure, smash it into a member function type.
5065 GCC shouldn't do this; it should just output pointer to member DIEs.
5066 This is GCC PR debug/28767. */
5069 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
5071 struct type *pfn_type, *domain_type, *new_type;
5073 /* Check for a structure with no name and two children. */
5074 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
5077 /* Check for __pfn and __delta members. */
5078 if (TYPE_FIELD_NAME (type, 0) == NULL
5079 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
5080 || TYPE_FIELD_NAME (type, 1) == NULL
5081 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
5084 /* Find the type of the method. */
5085 pfn_type = TYPE_FIELD_TYPE (type, 0);
5086 if (pfn_type == NULL
5087 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
5088 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
5091 /* Look for the "this" argument. */
5092 pfn_type = TYPE_TARGET_TYPE (pfn_type);
5093 if (TYPE_NFIELDS (pfn_type) == 0
5094 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5095 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
5098 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
5099 new_type = alloc_type (objfile);
5100 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
5101 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
5102 TYPE_VARARGS (pfn_type));
5103 smash_to_methodptr_type (type, new_type);
5106 /* Called when we find the DIE that starts a structure or union scope
5107 (definition) to process all dies that define the members of the
5110 NOTE: we need to call struct_type regardless of whether or not the
5111 DIE has an at_name attribute, since it might be an anonymous
5112 structure or union. This gets the type entered into our set of
5115 However, if the structure is incomplete (an opaque struct/union)
5116 then suppress creating a symbol table entry for it since gdb only
5117 wants to find the one with the complete definition. Note that if
5118 it is complete, we just call new_symbol, which does it's own
5119 checking about whether the struct/union is anonymous or not (and
5120 suppresses creating a symbol table entry itself). */
5122 static struct type *
5123 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
5125 struct objfile *objfile = cu->objfile;
5127 struct attribute *attr;
5129 struct cleanup *back_to;
5131 /* If the definition of this type lives in .debug_types, read that type.
5132 Don't follow DW_AT_specification though, that will take us back up
5133 the chain and we want to go down. */
5134 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5137 struct dwarf2_cu *type_cu = cu;
5138 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5140 /* We could just recurse on read_structure_type, but we need to call
5141 get_die_type to ensure only one type for this DIE is created.
5142 This is important, for example, because for c++ classes we need
5143 TYPE_NAME set which is only done by new_symbol. Blech. */
5144 type = read_type_die (type_die, type_cu);
5145 return set_die_type (die, type, cu);
5148 back_to = make_cleanup (null_cleanup, 0);
5150 type = alloc_type (objfile);
5151 INIT_CPLUS_SPECIFIC (type);
5153 name = dwarf2_name (die, cu);
5156 if (cu->language == language_cplus
5157 || cu->language == language_java)
5159 TYPE_TAG_NAME (type) = (char *) dwarf2_full_name (name, die, cu);
5160 if (die->tag == DW_TAG_structure_type
5161 || die->tag == DW_TAG_class_type)
5162 TYPE_NAME (type) = TYPE_TAG_NAME (type);
5166 /* The name is already allocated along with this objfile, so
5167 we don't need to duplicate it for the type. */
5168 TYPE_TAG_NAME (type) = (char *) name;
5169 if (die->tag == DW_TAG_class_type)
5170 TYPE_NAME (type) = TYPE_TAG_NAME (type);
5174 if (die->tag == DW_TAG_structure_type)
5176 TYPE_CODE (type) = TYPE_CODE_STRUCT;
5178 else if (die->tag == DW_TAG_union_type)
5180 TYPE_CODE (type) = TYPE_CODE_UNION;
5184 TYPE_CODE (type) = TYPE_CODE_CLASS;
5187 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
5188 TYPE_DECLARED_CLASS (type) = 1;
5190 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5193 TYPE_LENGTH (type) = DW_UNSND (attr);
5197 TYPE_LENGTH (type) = 0;
5200 TYPE_STUB_SUPPORTED (type) = 1;
5201 if (die_is_declaration (die, cu))
5202 TYPE_STUB (type) = 1;
5203 else if (attr == NULL && die->child == NULL
5204 && producer_is_realview (cu->producer))
5205 /* RealView does not output the required DW_AT_declaration
5206 on incomplete types. */
5207 TYPE_STUB (type) = 1;
5209 /* We need to add the type field to the die immediately so we don't
5210 infinitely recurse when dealing with pointers to the structure
5211 type within the structure itself. */
5212 set_die_type (die, type, cu);
5214 /* set_die_type should be already done. */
5215 set_descriptive_type (type, die, cu);
5217 if (die->child != NULL && ! die_is_declaration (die, cu))
5219 struct field_info fi;
5220 struct die_info *child_die;
5222 memset (&fi, 0, sizeof (struct field_info));
5224 child_die = die->child;
5226 while (child_die && child_die->tag)
5228 if (child_die->tag == DW_TAG_member
5229 || child_die->tag == DW_TAG_variable)
5231 /* NOTE: carlton/2002-11-05: A C++ static data member
5232 should be a DW_TAG_member that is a declaration, but
5233 all versions of G++ as of this writing (so through at
5234 least 3.2.1) incorrectly generate DW_TAG_variable
5235 tags for them instead. */
5236 dwarf2_add_field (&fi, child_die, cu);
5238 else if (child_die->tag == DW_TAG_subprogram)
5240 /* C++ member function. */
5241 dwarf2_add_member_fn (&fi, child_die, type, cu);
5243 else if (child_die->tag == DW_TAG_inheritance)
5245 /* C++ base class field. */
5246 dwarf2_add_field (&fi, child_die, cu);
5248 else if (child_die->tag == DW_TAG_typedef)
5249 dwarf2_add_typedef (&fi, child_die, cu);
5250 child_die = sibling_die (child_die);
5253 /* Attach fields and member functions to the type. */
5255 dwarf2_attach_fields_to_type (&fi, type, cu);
5258 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
5260 /* Get the type which refers to the base class (possibly this
5261 class itself) which contains the vtable pointer for the current
5262 class from the DW_AT_containing_type attribute. This use of
5263 DW_AT_containing_type is a GNU extension. */
5265 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
5267 struct type *t = die_containing_type (die, cu);
5269 TYPE_VPTR_BASETYPE (type) = t;
5274 /* Our own class provides vtbl ptr. */
5275 for (i = TYPE_NFIELDS (t) - 1;
5276 i >= TYPE_N_BASECLASSES (t);
5279 char *fieldname = TYPE_FIELD_NAME (t, i);
5281 if (is_vtable_name (fieldname, cu))
5283 TYPE_VPTR_FIELDNO (type) = i;
5288 /* Complain if virtual function table field not found. */
5289 if (i < TYPE_N_BASECLASSES (t))
5290 complaint (&symfile_complaints,
5291 _("virtual function table pointer not found when defining class '%s'"),
5292 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
5297 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
5300 else if (cu->producer
5301 && strncmp (cu->producer,
5302 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5304 /* The IBM XLC compiler does not provide direct indication
5305 of the containing type, but the vtable pointer is
5306 always named __vfp. */
5310 for (i = TYPE_NFIELDS (type) - 1;
5311 i >= TYPE_N_BASECLASSES (type);
5314 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
5316 TYPE_VPTR_FIELDNO (type) = i;
5317 TYPE_VPTR_BASETYPE (type) = type;
5324 /* Copy fi.typedef_field_list linked list elements content into the
5325 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
5326 if (fi.typedef_field_list)
5328 int i = fi.typedef_field_list_count;
5330 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5331 TYPE_TYPEDEF_FIELD_ARRAY (type)
5332 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
5333 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
5335 /* Reverse the list order to keep the debug info elements order. */
5338 struct typedef_field *dest, *src;
5340 dest = &TYPE_TYPEDEF_FIELD (type, i);
5341 src = &fi.typedef_field_list->field;
5342 fi.typedef_field_list = fi.typedef_field_list->next;
5348 quirk_gcc_member_function_pointer (type, cu->objfile);
5350 do_cleanups (back_to);
5355 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
5357 struct die_info *child_die = die->child;
5358 struct type *this_type;
5360 this_type = get_die_type (die, cu);
5361 if (this_type == NULL)
5362 this_type = read_structure_type (die, cu);
5364 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5365 snapshots) has been known to create a die giving a declaration
5366 for a class that has, as a child, a die giving a definition for a
5367 nested class. So we have to process our children even if the
5368 current die is a declaration. Normally, of course, a declaration
5369 won't have any children at all. */
5371 while (child_die != NULL && child_die->tag)
5373 if (child_die->tag == DW_TAG_member
5374 || child_die->tag == DW_TAG_variable
5375 || child_die->tag == DW_TAG_inheritance)
5380 process_die (child_die, cu);
5382 child_die = sibling_die (child_die);
5385 /* Do not consider external references. According to the DWARF standard,
5386 these DIEs are identified by the fact that they have no byte_size
5387 attribute, and a declaration attribute. */
5388 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
5389 || !die_is_declaration (die, cu))
5390 new_symbol (die, this_type, cu);
5393 /* Given a DW_AT_enumeration_type die, set its type. We do not
5394 complete the type's fields yet, or create any symbols. */
5396 static struct type *
5397 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
5399 struct objfile *objfile = cu->objfile;
5401 struct attribute *attr;
5404 /* If the definition of this type lives in .debug_types, read that type.
5405 Don't follow DW_AT_specification though, that will take us back up
5406 the chain and we want to go down. */
5407 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5410 struct dwarf2_cu *type_cu = cu;
5411 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5413 type = read_type_die (type_die, type_cu);
5414 return set_die_type (die, type, cu);
5417 type = alloc_type (objfile);
5419 TYPE_CODE (type) = TYPE_CODE_ENUM;
5420 name = dwarf2_full_name (NULL, die, cu);
5422 TYPE_TAG_NAME (type) = (char *) name;
5424 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5427 TYPE_LENGTH (type) = DW_UNSND (attr);
5431 TYPE_LENGTH (type) = 0;
5434 /* The enumeration DIE can be incomplete. In Ada, any type can be
5435 declared as private in the package spec, and then defined only
5436 inside the package body. Such types are known as Taft Amendment
5437 Types. When another package uses such a type, an incomplete DIE
5438 may be generated by the compiler. */
5439 if (die_is_declaration (die, cu))
5440 TYPE_STUB (type) = 1;
5442 return set_die_type (die, type, cu);
5445 /* Given a pointer to a die which begins an enumeration, process all
5446 the dies that define the members of the enumeration, and create the
5447 symbol for the enumeration type.
5449 NOTE: We reverse the order of the element list. */
5452 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
5454 struct die_info *child_die;
5455 struct field *fields;
5458 int unsigned_enum = 1;
5460 struct type *this_type;
5464 this_type = get_die_type (die, cu);
5465 if (this_type == NULL)
5466 this_type = read_enumeration_type (die, cu);
5467 if (die->child != NULL)
5469 child_die = die->child;
5470 while (child_die && child_die->tag)
5472 if (child_die->tag != DW_TAG_enumerator)
5474 process_die (child_die, cu);
5478 name = dwarf2_name (child_die, cu);
5481 sym = new_symbol (child_die, this_type, cu);
5482 if (SYMBOL_VALUE (sym) < 0)
5485 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
5487 fields = (struct field *)
5489 (num_fields + DW_FIELD_ALLOC_CHUNK)
5490 * sizeof (struct field));
5493 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
5494 FIELD_TYPE (fields[num_fields]) = NULL;
5495 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
5496 FIELD_BITSIZE (fields[num_fields]) = 0;
5502 child_die = sibling_die (child_die);
5507 TYPE_NFIELDS (this_type) = num_fields;
5508 TYPE_FIELDS (this_type) = (struct field *)
5509 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
5510 memcpy (TYPE_FIELDS (this_type), fields,
5511 sizeof (struct field) * num_fields);
5515 TYPE_UNSIGNED (this_type) = 1;
5518 new_symbol (die, this_type, cu);
5521 /* Extract all information from a DW_TAG_array_type DIE and put it in
5522 the DIE's type field. For now, this only handles one dimensional
5525 static struct type *
5526 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
5528 struct objfile *objfile = cu->objfile;
5529 struct die_info *child_die;
5531 struct type *element_type, *range_type, *index_type;
5532 struct type **range_types = NULL;
5533 struct attribute *attr;
5535 struct cleanup *back_to;
5538 element_type = die_type (die, cu);
5540 /* The die_type call above may have already set the type for this DIE. */
5541 type = get_die_type (die, cu);
5545 /* Irix 6.2 native cc creates array types without children for
5546 arrays with unspecified length. */
5547 if (die->child == NULL)
5549 index_type = objfile_type (objfile)->builtin_int;
5550 range_type = create_range_type (NULL, index_type, 0, -1);
5551 type = create_array_type (NULL, element_type, range_type);
5552 return set_die_type (die, type, cu);
5555 back_to = make_cleanup (null_cleanup, NULL);
5556 child_die = die->child;
5557 while (child_die && child_die->tag)
5559 if (child_die->tag == DW_TAG_subrange_type)
5561 struct type *child_type = read_type_die (child_die, cu);
5563 if (child_type != NULL)
5565 /* The range type was succesfully read. Save it for
5566 the array type creation. */
5567 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
5569 range_types = (struct type **)
5570 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
5571 * sizeof (struct type *));
5573 make_cleanup (free_current_contents, &range_types);
5575 range_types[ndim++] = child_type;
5578 child_die = sibling_die (child_die);
5581 /* Dwarf2 dimensions are output from left to right, create the
5582 necessary array types in backwards order. */
5584 type = element_type;
5586 if (read_array_order (die, cu) == DW_ORD_col_major)
5591 type = create_array_type (NULL, type, range_types[i++]);
5596 type = create_array_type (NULL, type, range_types[ndim]);
5599 /* Understand Dwarf2 support for vector types (like they occur on
5600 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5601 array type. This is not part of the Dwarf2/3 standard yet, but a
5602 custom vendor extension. The main difference between a regular
5603 array and the vector variant is that vectors are passed by value
5605 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
5607 make_vector_type (type);
5609 name = dwarf2_name (die, cu);
5611 TYPE_NAME (type) = name;
5613 /* Install the type in the die. */
5614 set_die_type (die, type, cu);
5616 /* set_die_type should be already done. */
5617 set_descriptive_type (type, die, cu);
5619 do_cleanups (back_to);
5624 static enum dwarf_array_dim_ordering
5625 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
5627 struct attribute *attr;
5629 attr = dwarf2_attr (die, DW_AT_ordering, cu);
5631 if (attr) return DW_SND (attr);
5634 GNU F77 is a special case, as at 08/2004 array type info is the
5635 opposite order to the dwarf2 specification, but data is still
5636 laid out as per normal fortran.
5638 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5642 if (cu->language == language_fortran
5643 && cu->producer && strstr (cu->producer, "GNU F77"))
5645 return DW_ORD_row_major;
5648 switch (cu->language_defn->la_array_ordering)
5650 case array_column_major:
5651 return DW_ORD_col_major;
5652 case array_row_major:
5654 return DW_ORD_row_major;
5658 /* Extract all information from a DW_TAG_set_type DIE and put it in
5659 the DIE's type field. */
5661 static struct type *
5662 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
5664 struct type *domain_type, *set_type;
5665 struct attribute *attr;
5667 domain_type = die_type (die, cu);
5669 /* The die_type call above may have already set the type for this DIE. */
5670 set_type = get_die_type (die, cu);
5674 set_type = create_set_type (NULL, domain_type);
5676 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5678 TYPE_LENGTH (set_type) = DW_UNSND (attr);
5680 return set_die_type (die, set_type, cu);
5683 /* First cut: install each common block member as a global variable. */
5686 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
5688 struct die_info *child_die;
5689 struct attribute *attr;
5691 CORE_ADDR base = (CORE_ADDR) 0;
5693 attr = dwarf2_attr (die, DW_AT_location, cu);
5696 /* Support the .debug_loc offsets */
5697 if (attr_form_is_block (attr))
5699 base = decode_locdesc (DW_BLOCK (attr), cu);
5701 else if (attr_form_is_section_offset (attr))
5703 dwarf2_complex_location_expr_complaint ();
5707 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5708 "common block member");
5711 if (die->child != NULL)
5713 child_die = die->child;
5714 while (child_die && child_die->tag)
5716 sym = new_symbol (child_die, NULL, cu);
5717 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
5720 CORE_ADDR byte_offset = 0;
5722 if (attr_form_is_section_offset (attr))
5723 dwarf2_complex_location_expr_complaint ();
5724 else if (attr_form_is_constant (attr))
5725 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
5726 else if (attr_form_is_block (attr))
5727 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
5729 dwarf2_complex_location_expr_complaint ();
5731 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
5732 add_symbol_to_list (sym, &global_symbols);
5734 child_die = sibling_die (child_die);
5739 /* Create a type for a C++ namespace. */
5741 static struct type *
5742 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
5744 struct objfile *objfile = cu->objfile;
5745 const char *previous_prefix, *name;
5749 /* For extensions, reuse the type of the original namespace. */
5750 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
5752 struct die_info *ext_die;
5753 struct dwarf2_cu *ext_cu = cu;
5755 ext_die = dwarf2_extension (die, &ext_cu);
5756 type = read_type_die (ext_die, ext_cu);
5757 return set_die_type (die, type, cu);
5760 name = namespace_name (die, &is_anonymous, cu);
5762 /* Now build the name of the current namespace. */
5764 previous_prefix = determine_prefix (die, cu);
5765 if (previous_prefix[0] != '\0')
5766 name = typename_concat (&objfile->objfile_obstack,
5767 previous_prefix, name, 0, cu);
5769 /* Create the type. */
5770 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
5772 TYPE_NAME (type) = (char *) name;
5773 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5775 return set_die_type (die, type, cu);
5778 /* Read a C++ namespace. */
5781 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
5783 struct objfile *objfile = cu->objfile;
5787 /* Add a symbol associated to this if we haven't seen the namespace
5788 before. Also, add a using directive if it's an anonymous
5791 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
5795 type = read_type_die (die, cu);
5796 new_symbol (die, type, cu);
5798 name = namespace_name (die, &is_anonymous, cu);
5801 const char *previous_prefix = determine_prefix (die, cu);
5803 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
5804 NULL, &objfile->objfile_obstack);
5808 if (die->child != NULL)
5810 struct die_info *child_die = die->child;
5812 while (child_die && child_die->tag)
5814 process_die (child_die, cu);
5815 child_die = sibling_die (child_die);
5820 /* Read a Fortran module as type. This DIE can be only a declaration used for
5821 imported module. Still we need that type as local Fortran "use ... only"
5822 declaration imports depend on the created type in determine_prefix. */
5824 static struct type *
5825 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
5827 struct objfile *objfile = cu->objfile;
5831 module_name = dwarf2_name (die, cu);
5833 complaint (&symfile_complaints, _("DW_TAG_module has no name, offset 0x%x"),
5835 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
5837 /* determine_prefix uses TYPE_TAG_NAME. */
5838 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5840 return set_die_type (die, type, cu);
5843 /* Read a Fortran module. */
5846 read_module (struct die_info *die, struct dwarf2_cu *cu)
5848 struct die_info *child_die = die->child;
5850 while (child_die && child_die->tag)
5852 process_die (child_die, cu);
5853 child_die = sibling_die (child_die);
5857 /* Return the name of the namespace represented by DIE. Set
5858 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5862 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
5864 struct die_info *current_die;
5865 const char *name = NULL;
5867 /* Loop through the extensions until we find a name. */
5869 for (current_die = die;
5870 current_die != NULL;
5871 current_die = dwarf2_extension (die, &cu))
5873 name = dwarf2_name (current_die, cu);
5878 /* Is it an anonymous namespace? */
5880 *is_anonymous = (name == NULL);
5882 name = "(anonymous namespace)";
5887 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5888 the user defined type vector. */
5890 static struct type *
5891 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
5893 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
5894 struct comp_unit_head *cu_header = &cu->header;
5896 struct attribute *attr_byte_size;
5897 struct attribute *attr_address_class;
5898 int byte_size, addr_class;
5899 struct type *target_type;
5901 target_type = die_type (die, cu);
5903 /* The die_type call above may have already set the type for this DIE. */
5904 type = get_die_type (die, cu);
5908 type = lookup_pointer_type (target_type);
5910 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
5912 byte_size = DW_UNSND (attr_byte_size);
5914 byte_size = cu_header->addr_size;
5916 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
5917 if (attr_address_class)
5918 addr_class = DW_UNSND (attr_address_class);
5920 addr_class = DW_ADDR_none;
5922 /* If the pointer size or address class is different than the
5923 default, create a type variant marked as such and set the
5924 length accordingly. */
5925 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
5927 if (gdbarch_address_class_type_flags_p (gdbarch))
5931 type_flags = gdbarch_address_class_type_flags
5932 (gdbarch, byte_size, addr_class);
5933 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
5935 type = make_type_with_address_space (type, type_flags);
5937 else if (TYPE_LENGTH (type) != byte_size)
5939 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
5943 /* Should we also complain about unhandled address classes? */
5947 TYPE_LENGTH (type) = byte_size;
5948 return set_die_type (die, type, cu);
5951 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5952 the user defined type vector. */
5954 static struct type *
5955 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
5958 struct type *to_type;
5959 struct type *domain;
5961 to_type = die_type (die, cu);
5962 domain = die_containing_type (die, cu);
5964 /* The calls above may have already set the type for this DIE. */
5965 type = get_die_type (die, cu);
5969 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
5970 type = lookup_methodptr_type (to_type);
5972 type = lookup_memberptr_type (to_type, domain);
5974 return set_die_type (die, type, cu);
5977 /* Extract all information from a DW_TAG_reference_type DIE and add to
5978 the user defined type vector. */
5980 static struct type *
5981 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
5983 struct comp_unit_head *cu_header = &cu->header;
5984 struct type *type, *target_type;
5985 struct attribute *attr;
5987 target_type = die_type (die, cu);
5989 /* The die_type call above may have already set the type for this DIE. */
5990 type = get_die_type (die, cu);
5994 type = lookup_reference_type (target_type);
5995 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5998 TYPE_LENGTH (type) = DW_UNSND (attr);
6002 TYPE_LENGTH (type) = cu_header->addr_size;
6004 return set_die_type (die, type, cu);
6007 static struct type *
6008 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
6010 struct type *base_type, *cv_type;
6012 base_type = die_type (die, cu);
6014 /* The die_type call above may have already set the type for this DIE. */
6015 cv_type = get_die_type (die, cu);
6019 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
6020 return set_die_type (die, cv_type, cu);
6023 static struct type *
6024 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
6026 struct type *base_type, *cv_type;
6028 base_type = die_type (die, cu);
6030 /* The die_type call above may have already set the type for this DIE. */
6031 cv_type = get_die_type (die, cu);
6035 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
6036 return set_die_type (die, cv_type, cu);
6039 /* Extract all information from a DW_TAG_string_type DIE and add to
6040 the user defined type vector. It isn't really a user defined type,
6041 but it behaves like one, with other DIE's using an AT_user_def_type
6042 attribute to reference it. */
6044 static struct type *
6045 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
6047 struct objfile *objfile = cu->objfile;
6048 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6049 struct type *type, *range_type, *index_type, *char_type;
6050 struct attribute *attr;
6051 unsigned int length;
6053 attr = dwarf2_attr (die, DW_AT_string_length, cu);
6056 length = DW_UNSND (attr);
6060 /* check for the DW_AT_byte_size attribute */
6061 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6064 length = DW_UNSND (attr);
6072 index_type = objfile_type (objfile)->builtin_int;
6073 range_type = create_range_type (NULL, index_type, 1, length);
6074 char_type = language_string_char_type (cu->language_defn, gdbarch);
6075 type = create_string_type (NULL, char_type, range_type);
6077 return set_die_type (die, type, cu);
6080 /* Handle DIES due to C code like:
6084 int (*funcp)(int a, long l);
6088 ('funcp' generates a DW_TAG_subroutine_type DIE)
6091 static struct type *
6092 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
6094 struct type *type; /* Type that this function returns */
6095 struct type *ftype; /* Function that returns above type */
6096 struct attribute *attr;
6098 type = die_type (die, cu);
6100 /* The die_type call above may have already set the type for this DIE. */
6101 ftype = get_die_type (die, cu);
6105 ftype = lookup_function_type (type);
6107 /* All functions in C++, Pascal and Java have prototypes. */
6108 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
6109 if ((attr && (DW_UNSND (attr) != 0))
6110 || cu->language == language_cplus
6111 || cu->language == language_java
6112 || cu->language == language_pascal)
6113 TYPE_PROTOTYPED (ftype) = 1;
6114 else if (producer_is_realview (cu->producer))
6115 /* RealView does not emit DW_AT_prototyped. We can not
6116 distinguish prototyped and unprototyped functions; default to
6117 prototyped, since that is more common in modern code (and
6118 RealView warns about unprototyped functions). */
6119 TYPE_PROTOTYPED (ftype) = 1;
6121 /* Store the calling convention in the type if it's available in
6122 the subroutine die. Otherwise set the calling convention to
6123 the default value DW_CC_normal. */
6124 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
6125 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
6127 /* We need to add the subroutine type to the die immediately so
6128 we don't infinitely recurse when dealing with parameters
6129 declared as the same subroutine type. */
6130 set_die_type (die, ftype, cu);
6132 if (die->child != NULL)
6134 struct type *void_type = objfile_type (cu->objfile)->builtin_void;
6135 struct die_info *child_die;
6136 int nparams, iparams;
6138 /* Count the number of parameters.
6139 FIXME: GDB currently ignores vararg functions, but knows about
6140 vararg member functions. */
6142 child_die = die->child;
6143 while (child_die && child_die->tag)
6145 if (child_die->tag == DW_TAG_formal_parameter)
6147 else if (child_die->tag == DW_TAG_unspecified_parameters)
6148 TYPE_VARARGS (ftype) = 1;
6149 child_die = sibling_die (child_die);
6152 /* Allocate storage for parameters and fill them in. */
6153 TYPE_NFIELDS (ftype) = nparams;
6154 TYPE_FIELDS (ftype) = (struct field *)
6155 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
6157 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
6158 even if we error out during the parameters reading below. */
6159 for (iparams = 0; iparams < nparams; iparams++)
6160 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
6163 child_die = die->child;
6164 while (child_die && child_die->tag)
6166 if (child_die->tag == DW_TAG_formal_parameter)
6168 /* Dwarf2 has no clean way to discern C++ static and non-static
6169 member functions. G++ helps GDB by marking the first
6170 parameter for non-static member functions (which is the
6171 this pointer) as artificial. We pass this information
6172 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
6173 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
6175 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
6178 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
6180 /* GCC/43521: In java, the formal parameter
6181 "this" is sometimes not marked with DW_AT_artificial. */
6182 if (cu->language == language_java)
6184 const char *name = dwarf2_name (child_die, cu);
6186 if (name && !strcmp (name, "this"))
6187 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
6190 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
6193 child_die = sibling_die (child_die);
6200 static struct type *
6201 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
6203 struct objfile *objfile = cu->objfile;
6204 const char *name = NULL;
6205 struct type *this_type;
6207 name = dwarf2_full_name (NULL, die, cu);
6208 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
6209 TYPE_FLAG_TARGET_STUB, NULL, objfile);
6210 TYPE_NAME (this_type) = (char *) name;
6211 set_die_type (die, this_type, cu);
6212 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
6216 /* Find a representation of a given base type and install
6217 it in the TYPE field of the die. */
6219 static struct type *
6220 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
6222 struct objfile *objfile = cu->objfile;
6224 struct attribute *attr;
6225 int encoding = 0, size = 0;
6227 enum type_code code = TYPE_CODE_INT;
6229 struct type *target_type = NULL;
6231 attr = dwarf2_attr (die, DW_AT_encoding, cu);
6234 encoding = DW_UNSND (attr);
6236 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6239 size = DW_UNSND (attr);
6241 name = dwarf2_name (die, cu);
6244 complaint (&symfile_complaints,
6245 _("DW_AT_name missing from DW_TAG_base_type"));
6250 case DW_ATE_address:
6251 /* Turn DW_ATE_address into a void * pointer. */
6252 code = TYPE_CODE_PTR;
6253 type_flags |= TYPE_FLAG_UNSIGNED;
6254 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
6256 case DW_ATE_boolean:
6257 code = TYPE_CODE_BOOL;
6258 type_flags |= TYPE_FLAG_UNSIGNED;
6260 case DW_ATE_complex_float:
6261 code = TYPE_CODE_COMPLEX;
6262 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
6264 case DW_ATE_decimal_float:
6265 code = TYPE_CODE_DECFLOAT;
6268 code = TYPE_CODE_FLT;
6272 case DW_ATE_unsigned:
6273 type_flags |= TYPE_FLAG_UNSIGNED;
6275 case DW_ATE_signed_char:
6276 if (cu->language == language_ada || cu->language == language_m2
6277 || cu->language == language_pascal)
6278 code = TYPE_CODE_CHAR;
6280 case DW_ATE_unsigned_char:
6281 if (cu->language == language_ada || cu->language == language_m2
6282 || cu->language == language_pascal)
6283 code = TYPE_CODE_CHAR;
6284 type_flags |= TYPE_FLAG_UNSIGNED;
6287 /* We just treat this as an integer and then recognize the
6288 type by name elsewhere. */
6292 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
6293 dwarf_type_encoding_name (encoding));
6297 type = init_type (code, size, type_flags, NULL, objfile);
6298 TYPE_NAME (type) = name;
6299 TYPE_TARGET_TYPE (type) = target_type;
6301 if (name && strcmp (name, "char") == 0)
6302 TYPE_NOSIGN (type) = 1;
6304 return set_die_type (die, type, cu);
6307 /* Read the given DW_AT_subrange DIE. */
6309 static struct type *
6310 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
6312 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
6313 struct type *base_type;
6314 struct type *range_type;
6315 struct attribute *attr;
6319 LONGEST negative_mask;
6321 base_type = die_type (die, cu);
6323 /* The die_type call above may have already set the type for this DIE. */
6324 range_type = get_die_type (die, cu);
6328 if (cu->language == language_fortran)
6330 /* FORTRAN implies a lower bound of 1, if not given. */
6334 /* FIXME: For variable sized arrays either of these could be
6335 a variable rather than a constant value. We'll allow it,
6336 but we don't know how to handle it. */
6337 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
6339 low = dwarf2_get_attr_constant_value (attr, 0);
6341 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
6344 if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
6346 /* GCC encodes arrays with unspecified or dynamic length
6347 with a DW_FORM_block1 attribute or a reference attribute.
6348 FIXME: GDB does not yet know how to handle dynamic
6349 arrays properly, treat them as arrays with unspecified
6352 FIXME: jimb/2003-09-22: GDB does not really know
6353 how to handle arrays of unspecified length
6354 either; we just represent them as zero-length
6355 arrays. Choose an appropriate upper bound given
6356 the lower bound we've computed above. */
6360 high = dwarf2_get_attr_constant_value (attr, 1);
6364 attr = dwarf2_attr (die, DW_AT_count, cu);
6367 int count = dwarf2_get_attr_constant_value (attr, 1);
6368 high = low + count - 1;
6372 /* Dwarf-2 specifications explicitly allows to create subrange types
6373 without specifying a base type.
6374 In that case, the base type must be set to the type of
6375 the lower bound, upper bound or count, in that order, if any of these
6376 three attributes references an object that has a type.
6377 If no base type is found, the Dwarf-2 specifications say that
6378 a signed integer type of size equal to the size of an address should
6380 For the following C code: `extern char gdb_int [];'
6381 GCC produces an empty range DIE.
6382 FIXME: muller/2010-05-28: Possible references to object for low bound,
6383 high bound or count are not yet handled by this code.
6385 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
6387 struct objfile *objfile = cu->objfile;
6388 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6389 int addr_size = gdbarch_addr_bit (gdbarch) /8;
6390 struct type *int_type = objfile_type (objfile)->builtin_int;
6392 /* Test "int", "long int", and "long long int" objfile types,
6393 and select the first one having a size above or equal to the
6394 architecture address size. */
6395 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
6396 base_type = int_type;
6399 int_type = objfile_type (objfile)->builtin_long;
6400 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
6401 base_type = int_type;
6404 int_type = objfile_type (objfile)->builtin_long_long;
6405 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
6406 base_type = int_type;
6412 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
6413 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
6414 low |= negative_mask;
6415 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
6416 high |= negative_mask;
6418 range_type = create_range_type (NULL, base_type, low, high);
6420 /* Mark arrays with dynamic length at least as an array of unspecified
6421 length. GDB could check the boundary but before it gets implemented at
6422 least allow accessing the array elements. */
6423 if (attr && attr->form == DW_FORM_block1)
6424 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
6426 name = dwarf2_name (die, cu);
6428 TYPE_NAME (range_type) = name;
6430 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6432 TYPE_LENGTH (range_type) = DW_UNSND (attr);
6434 set_die_type (die, range_type, cu);
6436 /* set_die_type should be already done. */
6437 set_descriptive_type (range_type, die, cu);
6442 static struct type *
6443 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
6447 /* For now, we only support the C meaning of an unspecified type: void. */
6449 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
6450 TYPE_NAME (type) = dwarf2_name (die, cu);
6452 return set_die_type (die, type, cu);
6455 /* Trivial hash function for die_info: the hash value of a DIE
6456 is its offset in .debug_info for this objfile. */
6459 die_hash (const void *item)
6461 const struct die_info *die = item;
6466 /* Trivial comparison function for die_info structures: two DIEs
6467 are equal if they have the same offset. */
6470 die_eq (const void *item_lhs, const void *item_rhs)
6472 const struct die_info *die_lhs = item_lhs;
6473 const struct die_info *die_rhs = item_rhs;
6475 return die_lhs->offset == die_rhs->offset;
6478 /* Read a whole compilation unit into a linked list of dies. */
6480 static struct die_info *
6481 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
6483 struct die_reader_specs reader_specs;
6485 gdb_assert (cu->die_hash == NULL);
6487 = htab_create_alloc_ex (cu->header.length / 12,
6491 &cu->comp_unit_obstack,
6492 hashtab_obstack_allocate,
6493 dummy_obstack_deallocate);
6495 init_cu_die_reader (&reader_specs, cu);
6497 return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
6500 /* Main entry point for reading a DIE and all children.
6501 Read the DIE and dump it if requested. */
6503 static struct die_info *
6504 read_die_and_children (const struct die_reader_specs *reader,
6506 gdb_byte **new_info_ptr,
6507 struct die_info *parent)
6509 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
6510 new_info_ptr, parent);
6512 if (dwarf2_die_debug)
6514 fprintf_unfiltered (gdb_stdlog,
6515 "\nRead die from %s of %s:\n",
6516 reader->buffer == dwarf2_per_objfile->info.buffer
6518 : reader->buffer == dwarf2_per_objfile->types.buffer
6520 : "unknown section",
6521 reader->abfd->filename);
6522 dump_die (result, dwarf2_die_debug);
6528 /* Read a single die and all its descendents. Set the die's sibling
6529 field to NULL; set other fields in the die correctly, and set all
6530 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6531 location of the info_ptr after reading all of those dies. PARENT
6532 is the parent of the die in question. */
6534 static struct die_info *
6535 read_die_and_children_1 (const struct die_reader_specs *reader,
6537 gdb_byte **new_info_ptr,
6538 struct die_info *parent)
6540 struct die_info *die;
6544 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
6547 *new_info_ptr = cur_ptr;
6550 store_in_ref_table (die, reader->cu);
6553 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
6557 *new_info_ptr = cur_ptr;
6560 die->sibling = NULL;
6561 die->parent = parent;
6565 /* Read a die, all of its descendents, and all of its siblings; set
6566 all of the fields of all of the dies correctly. Arguments are as
6567 in read_die_and_children. */
6569 static struct die_info *
6570 read_die_and_siblings (const struct die_reader_specs *reader,
6572 gdb_byte **new_info_ptr,
6573 struct die_info *parent)
6575 struct die_info *first_die, *last_sibling;
6579 first_die = last_sibling = NULL;
6583 struct die_info *die
6584 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
6588 *new_info_ptr = cur_ptr;
6595 last_sibling->sibling = die;
6601 /* Read the die from the .debug_info section buffer. Set DIEP to
6602 point to a newly allocated die with its information, except for its
6603 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6604 whether the die has children or not. */
6607 read_full_die (const struct die_reader_specs *reader,
6608 struct die_info **diep, gdb_byte *info_ptr,
6611 unsigned int abbrev_number, bytes_read, i, offset;
6612 struct abbrev_info *abbrev;
6613 struct die_info *die;
6614 struct dwarf2_cu *cu = reader->cu;
6615 bfd *abfd = reader->abfd;
6617 offset = info_ptr - reader->buffer;
6618 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6619 info_ptr += bytes_read;
6627 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
6629 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6631 bfd_get_filename (abfd));
6633 die = dwarf_alloc_die (cu, abbrev->num_attrs);
6634 die->offset = offset;
6635 die->tag = abbrev->tag;
6636 die->abbrev = abbrev_number;
6638 die->num_attrs = abbrev->num_attrs;
6640 for (i = 0; i < abbrev->num_attrs; ++i)
6641 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
6642 abfd, info_ptr, cu);
6645 *has_children = abbrev->has_children;
6649 /* In DWARF version 2, the description of the debugging information is
6650 stored in a separate .debug_abbrev section. Before we read any
6651 dies from a section we read in all abbreviations and install them
6652 in a hash table. This function also sets flags in CU describing
6653 the data found in the abbrev table. */
6656 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
6658 struct comp_unit_head *cu_header = &cu->header;
6659 gdb_byte *abbrev_ptr;
6660 struct abbrev_info *cur_abbrev;
6661 unsigned int abbrev_number, bytes_read, abbrev_name;
6662 unsigned int abbrev_form, hash_number;
6663 struct attr_abbrev *cur_attrs;
6664 unsigned int allocated_attrs;
6666 /* Initialize dwarf2 abbrevs */
6667 obstack_init (&cu->abbrev_obstack);
6668 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
6670 * sizeof (struct abbrev_info *)));
6671 memset (cu->dwarf2_abbrevs, 0,
6672 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
6674 dwarf2_read_section (dwarf2_per_objfile->objfile,
6675 &dwarf2_per_objfile->abbrev);
6676 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
6677 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6678 abbrev_ptr += bytes_read;
6680 allocated_attrs = ATTR_ALLOC_CHUNK;
6681 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
6683 /* loop until we reach an abbrev number of 0 */
6684 while (abbrev_number)
6686 cur_abbrev = dwarf_alloc_abbrev (cu);
6688 /* read in abbrev header */
6689 cur_abbrev->number = abbrev_number;
6690 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6691 abbrev_ptr += bytes_read;
6692 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
6695 if (cur_abbrev->tag == DW_TAG_namespace)
6696 cu->has_namespace_info = 1;
6698 /* now read in declarations */
6699 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6700 abbrev_ptr += bytes_read;
6701 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6702 abbrev_ptr += bytes_read;
6705 if (cur_abbrev->num_attrs == allocated_attrs)
6707 allocated_attrs += ATTR_ALLOC_CHUNK;
6709 = xrealloc (cur_attrs, (allocated_attrs
6710 * sizeof (struct attr_abbrev)));
6713 /* Record whether this compilation unit might have
6714 inter-compilation-unit references. If we don't know what form
6715 this attribute will have, then it might potentially be a
6716 DW_FORM_ref_addr, so we conservatively expect inter-CU
6719 if (abbrev_form == DW_FORM_ref_addr
6720 || abbrev_form == DW_FORM_indirect)
6721 cu->has_form_ref_addr = 1;
6723 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
6724 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
6725 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6726 abbrev_ptr += bytes_read;
6727 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6728 abbrev_ptr += bytes_read;
6731 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
6732 (cur_abbrev->num_attrs
6733 * sizeof (struct attr_abbrev)));
6734 memcpy (cur_abbrev->attrs, cur_attrs,
6735 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
6737 hash_number = abbrev_number % ABBREV_HASH_SIZE;
6738 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
6739 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
6741 /* Get next abbreviation.
6742 Under Irix6 the abbreviations for a compilation unit are not
6743 always properly terminated with an abbrev number of 0.
6744 Exit loop if we encounter an abbreviation which we have
6745 already read (which means we are about to read the abbreviations
6746 for the next compile unit) or if the end of the abbreviation
6747 table is reached. */
6748 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
6749 >= dwarf2_per_objfile->abbrev.size)
6751 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6752 abbrev_ptr += bytes_read;
6753 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
6760 /* Release the memory used by the abbrev table for a compilation unit. */
6763 dwarf2_free_abbrev_table (void *ptr_to_cu)
6765 struct dwarf2_cu *cu = ptr_to_cu;
6767 obstack_free (&cu->abbrev_obstack, NULL);
6768 cu->dwarf2_abbrevs = NULL;
6771 /* Lookup an abbrev_info structure in the abbrev hash table. */
6773 static struct abbrev_info *
6774 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
6776 unsigned int hash_number;
6777 struct abbrev_info *abbrev;
6779 hash_number = number % ABBREV_HASH_SIZE;
6780 abbrev = cu->dwarf2_abbrevs[hash_number];
6784 if (abbrev->number == number)
6787 abbrev = abbrev->next;
6792 /* Returns nonzero if TAG represents a type that we might generate a partial
6796 is_type_tag_for_partial (int tag)
6801 /* Some types that would be reasonable to generate partial symbols for,
6802 that we don't at present. */
6803 case DW_TAG_array_type:
6804 case DW_TAG_file_type:
6805 case DW_TAG_ptr_to_member_type:
6806 case DW_TAG_set_type:
6807 case DW_TAG_string_type:
6808 case DW_TAG_subroutine_type:
6810 case DW_TAG_base_type:
6811 case DW_TAG_class_type:
6812 case DW_TAG_interface_type:
6813 case DW_TAG_enumeration_type:
6814 case DW_TAG_structure_type:
6815 case DW_TAG_subrange_type:
6816 case DW_TAG_typedef:
6817 case DW_TAG_union_type:
6824 /* Load all DIEs that are interesting for partial symbols into memory. */
6826 static struct partial_die_info *
6827 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
6828 int building_psymtab, struct dwarf2_cu *cu)
6830 struct partial_die_info *part_die;
6831 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
6832 struct abbrev_info *abbrev;
6833 unsigned int bytes_read;
6834 unsigned int load_all = 0;
6836 int nesting_level = 1;
6841 if (cu->per_cu && cu->per_cu->load_all_dies)
6845 = htab_create_alloc_ex (cu->header.length / 12,
6849 &cu->comp_unit_obstack,
6850 hashtab_obstack_allocate,
6851 dummy_obstack_deallocate);
6853 part_die = obstack_alloc (&cu->comp_unit_obstack,
6854 sizeof (struct partial_die_info));
6858 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6860 /* A NULL abbrev means the end of a series of children. */
6863 if (--nesting_level == 0)
6865 /* PART_DIE was probably the last thing allocated on the
6866 comp_unit_obstack, so we could call obstack_free
6867 here. We don't do that because the waste is small,
6868 and will be cleaned up when we're done with this
6869 compilation unit. This way, we're also more robust
6870 against other users of the comp_unit_obstack. */
6873 info_ptr += bytes_read;
6874 last_die = parent_die;
6875 parent_die = parent_die->die_parent;
6879 /* Check whether this DIE is interesting enough to save. Normally
6880 we would not be interested in members here, but there may be
6881 later variables referencing them via DW_AT_specification (for
6884 && !is_type_tag_for_partial (abbrev->tag)
6885 && abbrev->tag != DW_TAG_enumerator
6886 && abbrev->tag != DW_TAG_subprogram
6887 && abbrev->tag != DW_TAG_lexical_block
6888 && abbrev->tag != DW_TAG_variable
6889 && abbrev->tag != DW_TAG_namespace
6890 && abbrev->tag != DW_TAG_module
6891 && abbrev->tag != DW_TAG_member)
6893 /* Otherwise we skip to the next sibling, if any. */
6894 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
6898 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
6899 buffer, info_ptr, cu);
6901 /* This two-pass algorithm for processing partial symbols has a
6902 high cost in cache pressure. Thus, handle some simple cases
6903 here which cover the majority of C partial symbols. DIEs
6904 which neither have specification tags in them, nor could have
6905 specification tags elsewhere pointing at them, can simply be
6906 processed and discarded.
6908 This segment is also optional; scan_partial_symbols and
6909 add_partial_symbol will handle these DIEs if we chain
6910 them in normally. When compilers which do not emit large
6911 quantities of duplicate debug information are more common,
6912 this code can probably be removed. */
6914 /* Any complete simple types at the top level (pretty much all
6915 of them, for a language without namespaces), can be processed
6917 if (parent_die == NULL
6918 && part_die->has_specification == 0
6919 && part_die->is_declaration == 0
6920 && (part_die->tag == DW_TAG_typedef
6921 || part_die->tag == DW_TAG_base_type
6922 || part_die->tag == DW_TAG_subrange_type))
6924 if (building_psymtab && part_die->name != NULL)
6925 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6926 VAR_DOMAIN, LOC_TYPEDEF,
6927 &cu->objfile->static_psymbols,
6928 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6929 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6933 /* If we're at the second level, and we're an enumerator, and
6934 our parent has no specification (meaning possibly lives in a
6935 namespace elsewhere), then we can add the partial symbol now
6936 instead of queueing it. */
6937 if (part_die->tag == DW_TAG_enumerator
6938 && parent_die != NULL
6939 && parent_die->die_parent == NULL
6940 && parent_die->tag == DW_TAG_enumeration_type
6941 && parent_die->has_specification == 0)
6943 if (part_die->name == NULL)
6944 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6945 else if (building_psymtab)
6946 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6947 VAR_DOMAIN, LOC_CONST,
6948 (cu->language == language_cplus
6949 || cu->language == language_java)
6950 ? &cu->objfile->global_psymbols
6951 : &cu->objfile->static_psymbols,
6952 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6954 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6958 /* We'll save this DIE so link it in. */
6959 part_die->die_parent = parent_die;
6960 part_die->die_sibling = NULL;
6961 part_die->die_child = NULL;
6963 if (last_die && last_die == parent_die)
6964 last_die->die_child = part_die;
6966 last_die->die_sibling = part_die;
6968 last_die = part_die;
6970 if (first_die == NULL)
6971 first_die = part_die;
6973 /* Maybe add the DIE to the hash table. Not all DIEs that we
6974 find interesting need to be in the hash table, because we
6975 also have the parent/sibling/child chains; only those that we
6976 might refer to by offset later during partial symbol reading.
6978 For now this means things that might have be the target of a
6979 DW_AT_specification, DW_AT_abstract_origin, or
6980 DW_AT_extension. DW_AT_extension will refer only to
6981 namespaces; DW_AT_abstract_origin refers to functions (and
6982 many things under the function DIE, but we do not recurse
6983 into function DIEs during partial symbol reading) and
6984 possibly variables as well; DW_AT_specification refers to
6985 declarations. Declarations ought to have the DW_AT_declaration
6986 flag. It happens that GCC forgets to put it in sometimes, but
6987 only for functions, not for types.
6989 Adding more things than necessary to the hash table is harmless
6990 except for the performance cost. Adding too few will result in
6991 wasted time in find_partial_die, when we reread the compilation
6992 unit with load_all_dies set. */
6995 || abbrev->tag == DW_TAG_subprogram
6996 || abbrev->tag == DW_TAG_variable
6997 || abbrev->tag == DW_TAG_namespace
6998 || part_die->is_declaration)
7002 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
7003 part_die->offset, INSERT);
7007 part_die = obstack_alloc (&cu->comp_unit_obstack,
7008 sizeof (struct partial_die_info));
7010 /* For some DIEs we want to follow their children (if any). For C
7011 we have no reason to follow the children of structures; for other
7012 languages we have to, both so that we can get at method physnames
7013 to infer fully qualified class names, and for DW_AT_specification.
7015 For Ada, we need to scan the children of subprograms and lexical
7016 blocks as well because Ada allows the definition of nested
7017 entities that could be interesting for the debugger, such as
7018 nested subprograms for instance. */
7019 if (last_die->has_children
7021 || last_die->tag == DW_TAG_namespace
7022 || last_die->tag == DW_TAG_module
7023 || last_die->tag == DW_TAG_enumeration_type
7024 || (cu->language != language_c
7025 && (last_die->tag == DW_TAG_class_type
7026 || last_die->tag == DW_TAG_interface_type
7027 || last_die->tag == DW_TAG_structure_type
7028 || last_die->tag == DW_TAG_union_type))
7029 || (cu->language == language_ada
7030 && (last_die->tag == DW_TAG_subprogram
7031 || last_die->tag == DW_TAG_lexical_block))))
7034 parent_die = last_die;
7038 /* Otherwise we skip to the next sibling, if any. */
7039 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
7041 /* Back to the top, do it again. */
7045 /* Read a minimal amount of information into the minimal die structure. */
7048 read_partial_die (struct partial_die_info *part_die,
7049 struct abbrev_info *abbrev,
7050 unsigned int abbrev_len, bfd *abfd,
7051 gdb_byte *buffer, gdb_byte *info_ptr,
7052 struct dwarf2_cu *cu)
7055 struct attribute attr;
7056 int has_low_pc_attr = 0;
7057 int has_high_pc_attr = 0;
7059 memset (part_die, 0, sizeof (struct partial_die_info));
7061 part_die->offset = info_ptr - buffer;
7063 info_ptr += abbrev_len;
7068 part_die->tag = abbrev->tag;
7069 part_die->has_children = abbrev->has_children;
7071 for (i = 0; i < abbrev->num_attrs; ++i)
7073 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
7075 /* Store the data if it is of an attribute we want to keep in a
7076 partial symbol table. */
7080 switch (part_die->tag)
7082 case DW_TAG_compile_unit:
7083 case DW_TAG_type_unit:
7084 /* Compilation units have a DW_AT_name that is a filename, not
7085 a source language identifier. */
7086 case DW_TAG_enumeration_type:
7087 case DW_TAG_enumerator:
7088 /* These tags always have simple identifiers already; no need
7089 to canonicalize them. */
7090 part_die->name = DW_STRING (&attr);
7094 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
7095 &cu->objfile->objfile_obstack);
7099 case DW_AT_linkage_name:
7100 case DW_AT_MIPS_linkage_name:
7101 /* Note that both forms of linkage name might appear. We
7102 assume they will be the same, and we only store the last
7104 if (cu->language == language_ada)
7105 part_die->name = DW_STRING (&attr);
7108 has_low_pc_attr = 1;
7109 part_die->lowpc = DW_ADDR (&attr);
7112 has_high_pc_attr = 1;
7113 part_die->highpc = DW_ADDR (&attr);
7115 case DW_AT_location:
7116 /* Support the .debug_loc offsets */
7117 if (attr_form_is_block (&attr))
7119 part_die->locdesc = DW_BLOCK (&attr);
7121 else if (attr_form_is_section_offset (&attr))
7123 dwarf2_complex_location_expr_complaint ();
7127 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7128 "partial symbol information");
7131 case DW_AT_external:
7132 part_die->is_external = DW_UNSND (&attr);
7134 case DW_AT_declaration:
7135 part_die->is_declaration = DW_UNSND (&attr);
7138 part_die->has_type = 1;
7140 case DW_AT_abstract_origin:
7141 case DW_AT_specification:
7142 case DW_AT_extension:
7143 part_die->has_specification = 1;
7144 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
7147 /* Ignore absolute siblings, they might point outside of
7148 the current compile unit. */
7149 if (attr.form == DW_FORM_ref_addr)
7150 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
7152 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
7154 case DW_AT_byte_size:
7155 part_die->has_byte_size = 1;
7157 case DW_AT_calling_convention:
7158 /* DWARF doesn't provide a way to identify a program's source-level
7159 entry point. DW_AT_calling_convention attributes are only meant
7160 to describe functions' calling conventions.
7162 However, because it's a necessary piece of information in
7163 Fortran, and because DW_CC_program is the only piece of debugging
7164 information whose definition refers to a 'main program' at all,
7165 several compilers have begun marking Fortran main programs with
7166 DW_CC_program --- even when those functions use the standard
7167 calling conventions.
7169 So until DWARF specifies a way to provide this information and
7170 compilers pick up the new representation, we'll support this
7172 if (DW_UNSND (&attr) == DW_CC_program
7173 && cu->language == language_fortran)
7174 set_main_name (part_die->name);
7181 /* When using the GNU linker, .gnu.linkonce. sections are used to
7182 eliminate duplicate copies of functions and vtables and such.
7183 The linker will arbitrarily choose one and discard the others.
7184 The AT_*_pc values for such functions refer to local labels in
7185 these sections. If the section from that file was discarded, the
7186 labels are not in the output, so the relocs get a value of 0.
7187 If this is a discarded function, mark the pc bounds as invalid,
7188 so that GDB will ignore it. */
7189 if (has_low_pc_attr && has_high_pc_attr
7190 && part_die->lowpc < part_die->highpc
7191 && (part_die->lowpc != 0
7192 || dwarf2_per_objfile->has_section_at_zero))
7193 part_die->has_pc_info = 1;
7198 /* Find a cached partial DIE at OFFSET in CU. */
7200 static struct partial_die_info *
7201 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
7203 struct partial_die_info *lookup_die = NULL;
7204 struct partial_die_info part_die;
7206 part_die.offset = offset;
7207 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
7212 /* Find a partial DIE at OFFSET, which may or may not be in CU,
7213 except in the case of .debug_types DIEs which do not reference
7214 outside their CU (they do however referencing other types via
7217 static struct partial_die_info *
7218 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
7220 struct dwarf2_per_cu_data *per_cu = NULL;
7221 struct partial_die_info *pd = NULL;
7223 if (cu->per_cu->from_debug_types)
7225 pd = find_partial_die_in_comp_unit (offset, cu);
7231 if (offset_in_cu_p (&cu->header, offset))
7233 pd = find_partial_die_in_comp_unit (offset, cu);
7238 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
7240 if (per_cu->cu == NULL)
7242 load_partial_comp_unit (per_cu, cu->objfile);
7243 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
7244 dwarf2_per_objfile->read_in_chain = per_cu;
7247 per_cu->cu->last_used = 0;
7248 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
7250 if (pd == NULL && per_cu->load_all_dies == 0)
7252 struct cleanup *back_to;
7253 struct partial_die_info comp_unit_die;
7254 struct abbrev_info *abbrev;
7255 unsigned int bytes_read;
7258 per_cu->load_all_dies = 1;
7260 /* Re-read the DIEs. */
7261 back_to = make_cleanup (null_cleanup, 0);
7262 if (per_cu->cu->dwarf2_abbrevs == NULL)
7264 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
7265 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
7267 info_ptr = (dwarf2_per_objfile->info.buffer
7268 + per_cu->cu->header.offset
7269 + per_cu->cu->header.first_die_offset);
7270 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
7271 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
7272 per_cu->cu->objfile->obfd,
7273 dwarf2_per_objfile->info.buffer, info_ptr,
7275 if (comp_unit_die.has_children)
7276 load_partial_dies (per_cu->cu->objfile->obfd,
7277 dwarf2_per_objfile->info.buffer, info_ptr,
7279 do_cleanups (back_to);
7281 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
7287 internal_error (__FILE__, __LINE__,
7288 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7289 offset, bfd_get_filename (cu->objfile->obfd));
7293 /* Adjust PART_DIE before generating a symbol for it. This function
7294 may set the is_external flag or change the DIE's name. */
7297 fixup_partial_die (struct partial_die_info *part_die,
7298 struct dwarf2_cu *cu)
7300 /* If we found a reference attribute and the DIE has no name, try
7301 to find a name in the referred to DIE. */
7303 if (part_die->name == NULL && part_die->has_specification)
7305 struct partial_die_info *spec_die;
7307 spec_die = find_partial_die (part_die->spec_offset, cu);
7309 fixup_partial_die (spec_die, cu);
7313 part_die->name = spec_die->name;
7315 /* Copy DW_AT_external attribute if it is set. */
7316 if (spec_die->is_external)
7317 part_die->is_external = spec_die->is_external;
7321 /* Set default names for some unnamed DIEs. */
7322 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
7323 || part_die->tag == DW_TAG_class_type))
7324 part_die->name = "(anonymous class)";
7326 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
7327 part_die->name = "(anonymous namespace)";
7329 if (part_die->tag == DW_TAG_structure_type
7330 || part_die->tag == DW_TAG_class_type
7331 || part_die->tag == DW_TAG_union_type)
7332 guess_structure_name (part_die, cu);
7335 /* Read an attribute value described by an attribute form. */
7338 read_attribute_value (struct attribute *attr, unsigned form,
7339 bfd *abfd, gdb_byte *info_ptr,
7340 struct dwarf2_cu *cu)
7342 struct comp_unit_head *cu_header = &cu->header;
7343 unsigned int bytes_read;
7344 struct dwarf_block *blk;
7349 case DW_FORM_ref_addr:
7350 if (cu->header.version == 2)
7351 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
7353 DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
7354 info_ptr += bytes_read;
7357 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
7358 info_ptr += bytes_read;
7360 case DW_FORM_block2:
7361 blk = dwarf_alloc_block (cu);
7362 blk->size = read_2_bytes (abfd, info_ptr);
7364 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7365 info_ptr += blk->size;
7366 DW_BLOCK (attr) = blk;
7368 case DW_FORM_block4:
7369 blk = dwarf_alloc_block (cu);
7370 blk->size = read_4_bytes (abfd, info_ptr);
7372 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7373 info_ptr += blk->size;
7374 DW_BLOCK (attr) = blk;
7377 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
7381 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
7385 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
7388 case DW_FORM_sec_offset:
7389 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
7390 info_ptr += bytes_read;
7392 case DW_FORM_string:
7393 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
7394 DW_STRING_IS_CANONICAL (attr) = 0;
7395 info_ptr += bytes_read;
7398 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
7400 DW_STRING_IS_CANONICAL (attr) = 0;
7401 info_ptr += bytes_read;
7403 case DW_FORM_exprloc:
7405 blk = dwarf_alloc_block (cu);
7406 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7407 info_ptr += bytes_read;
7408 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7409 info_ptr += blk->size;
7410 DW_BLOCK (attr) = blk;
7412 case DW_FORM_block1:
7413 blk = dwarf_alloc_block (cu);
7414 blk->size = read_1_byte (abfd, info_ptr);
7416 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7417 info_ptr += blk->size;
7418 DW_BLOCK (attr) = blk;
7421 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7425 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7428 case DW_FORM_flag_present:
7429 DW_UNSND (attr) = 1;
7432 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
7433 info_ptr += bytes_read;
7436 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7437 info_ptr += bytes_read;
7440 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
7444 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
7448 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
7452 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
7456 /* Convert the signature to something we can record in DW_UNSND
7458 NOTE: This is NULL if the type wasn't found. */
7459 DW_SIGNATURED_TYPE (attr) =
7460 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
7463 case DW_FORM_ref_udata:
7464 DW_ADDR (attr) = (cu->header.offset
7465 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
7466 info_ptr += bytes_read;
7468 case DW_FORM_indirect:
7469 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7470 info_ptr += bytes_read;
7471 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
7474 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7475 dwarf_form_name (form),
7476 bfd_get_filename (abfd));
7479 /* We have seen instances where the compiler tried to emit a byte
7480 size attribute of -1 which ended up being encoded as an unsigned
7481 0xffffffff. Although 0xffffffff is technically a valid size value,
7482 an object of this size seems pretty unlikely so we can relatively
7483 safely treat these cases as if the size attribute was invalid and
7484 treat them as zero by default. */
7485 if (attr->name == DW_AT_byte_size
7486 && form == DW_FORM_data4
7487 && DW_UNSND (attr) >= 0xffffffff)
7490 (&symfile_complaints,
7491 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7492 hex_string (DW_UNSND (attr)));
7493 DW_UNSND (attr) = 0;
7499 /* Read an attribute described by an abbreviated attribute. */
7502 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
7503 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
7505 attr->name = abbrev->name;
7506 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
7509 /* read dwarf information from a buffer */
7512 read_1_byte (bfd *abfd, gdb_byte *buf)
7514 return bfd_get_8 (abfd, buf);
7518 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
7520 return bfd_get_signed_8 (abfd, buf);
7524 read_2_bytes (bfd *abfd, gdb_byte *buf)
7526 return bfd_get_16 (abfd, buf);
7530 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
7532 return bfd_get_signed_16 (abfd, buf);
7536 read_4_bytes (bfd *abfd, gdb_byte *buf)
7538 return bfd_get_32 (abfd, buf);
7542 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
7544 return bfd_get_signed_32 (abfd, buf);
7548 read_8_bytes (bfd *abfd, gdb_byte *buf)
7550 return bfd_get_64 (abfd, buf);
7554 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
7555 unsigned int *bytes_read)
7557 struct comp_unit_head *cu_header = &cu->header;
7558 CORE_ADDR retval = 0;
7560 if (cu_header->signed_addr_p)
7562 switch (cu_header->addr_size)
7565 retval = bfd_get_signed_16 (abfd, buf);
7568 retval = bfd_get_signed_32 (abfd, buf);
7571 retval = bfd_get_signed_64 (abfd, buf);
7574 internal_error (__FILE__, __LINE__,
7575 _("read_address: bad switch, signed [in module %s]"),
7576 bfd_get_filename (abfd));
7581 switch (cu_header->addr_size)
7584 retval = bfd_get_16 (abfd, buf);
7587 retval = bfd_get_32 (abfd, buf);
7590 retval = bfd_get_64 (abfd, buf);
7593 internal_error (__FILE__, __LINE__,
7594 _("read_address: bad switch, unsigned [in module %s]"),
7595 bfd_get_filename (abfd));
7599 *bytes_read = cu_header->addr_size;
7603 /* Read the initial length from a section. The (draft) DWARF 3
7604 specification allows the initial length to take up either 4 bytes
7605 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7606 bytes describe the length and all offsets will be 8 bytes in length
7609 An older, non-standard 64-bit format is also handled by this
7610 function. The older format in question stores the initial length
7611 as an 8-byte quantity without an escape value. Lengths greater
7612 than 2^32 aren't very common which means that the initial 4 bytes
7613 is almost always zero. Since a length value of zero doesn't make
7614 sense for the 32-bit format, this initial zero can be considered to
7615 be an escape value which indicates the presence of the older 64-bit
7616 format. As written, the code can't detect (old format) lengths
7617 greater than 4GB. If it becomes necessary to handle lengths
7618 somewhat larger than 4GB, we could allow other small values (such
7619 as the non-sensical values of 1, 2, and 3) to also be used as
7620 escape values indicating the presence of the old format.
7622 The value returned via bytes_read should be used to increment the
7623 relevant pointer after calling read_initial_length().
7625 [ Note: read_initial_length() and read_offset() are based on the
7626 document entitled "DWARF Debugging Information Format", revision
7627 3, draft 8, dated November 19, 2001. This document was obtained
7630 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7632 This document is only a draft and is subject to change. (So beware.)
7634 Details regarding the older, non-standard 64-bit format were
7635 determined empirically by examining 64-bit ELF files produced by
7636 the SGI toolchain on an IRIX 6.5 machine.
7638 - Kevin, July 16, 2002
7642 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
7644 LONGEST length = bfd_get_32 (abfd, buf);
7646 if (length == 0xffffffff)
7648 length = bfd_get_64 (abfd, buf + 4);
7651 else if (length == 0)
7653 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7654 length = bfd_get_64 (abfd, buf);
7665 /* Cover function for read_initial_length.
7666 Returns the length of the object at BUF, and stores the size of the
7667 initial length in *BYTES_READ and stores the size that offsets will be in
7669 If the initial length size is not equivalent to that specified in
7670 CU_HEADER then issue a complaint.
7671 This is useful when reading non-comp-unit headers. */
7674 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
7675 const struct comp_unit_head *cu_header,
7676 unsigned int *bytes_read,
7677 unsigned int *offset_size)
7679 LONGEST length = read_initial_length (abfd, buf, bytes_read);
7681 gdb_assert (cu_header->initial_length_size == 4
7682 || cu_header->initial_length_size == 8
7683 || cu_header->initial_length_size == 12);
7685 if (cu_header->initial_length_size != *bytes_read)
7686 complaint (&symfile_complaints,
7687 _("intermixed 32-bit and 64-bit DWARF sections"));
7689 *offset_size = (*bytes_read == 4) ? 4 : 8;
7693 /* Read an offset from the data stream. The size of the offset is
7694 given by cu_header->offset_size. */
7697 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
7698 unsigned int *bytes_read)
7700 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
7702 *bytes_read = cu_header->offset_size;
7706 /* Read an offset from the data stream. */
7709 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
7713 switch (offset_size)
7716 retval = bfd_get_32 (abfd, buf);
7719 retval = bfd_get_64 (abfd, buf);
7722 internal_error (__FILE__, __LINE__,
7723 _("read_offset_1: bad switch [in module %s]"),
7724 bfd_get_filename (abfd));
7731 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
7733 /* If the size of a host char is 8 bits, we can return a pointer
7734 to the buffer, otherwise we have to copy the data to a buffer
7735 allocated on the temporary obstack. */
7736 gdb_assert (HOST_CHAR_BIT == 8);
7741 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7743 /* If the size of a host char is 8 bits, we can return a pointer
7744 to the string, otherwise we have to copy the string to a buffer
7745 allocated on the temporary obstack. */
7746 gdb_assert (HOST_CHAR_BIT == 8);
7749 *bytes_read_ptr = 1;
7752 *bytes_read_ptr = strlen ((char *) buf) + 1;
7753 return (char *) buf;
7757 read_indirect_string (bfd *abfd, gdb_byte *buf,
7758 const struct comp_unit_head *cu_header,
7759 unsigned int *bytes_read_ptr)
7761 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
7763 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
7764 if (dwarf2_per_objfile->str.buffer == NULL)
7766 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7767 bfd_get_filename (abfd));
7770 if (str_offset >= dwarf2_per_objfile->str.size)
7772 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7773 bfd_get_filename (abfd));
7776 gdb_assert (HOST_CHAR_BIT == 8);
7777 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
7779 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
7782 static unsigned long
7783 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7785 unsigned long result;
7786 unsigned int num_read;
7796 byte = bfd_get_8 (abfd, buf);
7799 result |= ((unsigned long)(byte & 127) << shift);
7800 if ((byte & 128) == 0)
7806 *bytes_read_ptr = num_read;
7811 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7814 int i, shift, num_read;
7823 byte = bfd_get_8 (abfd, buf);
7826 result |= ((long)(byte & 127) << shift);
7828 if ((byte & 128) == 0)
7833 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
7834 result |= -(((long)1) << shift);
7835 *bytes_read_ptr = num_read;
7839 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7842 skip_leb128 (bfd *abfd, gdb_byte *buf)
7848 byte = bfd_get_8 (abfd, buf);
7850 if ((byte & 128) == 0)
7856 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
7863 cu->language = language_c;
7865 case DW_LANG_C_plus_plus:
7866 cu->language = language_cplus;
7869 cu->language = language_d;
7871 case DW_LANG_Fortran77:
7872 case DW_LANG_Fortran90:
7873 case DW_LANG_Fortran95:
7874 cu->language = language_fortran;
7876 case DW_LANG_Mips_Assembler:
7877 cu->language = language_asm;
7880 cu->language = language_java;
7884 cu->language = language_ada;
7886 case DW_LANG_Modula2:
7887 cu->language = language_m2;
7889 case DW_LANG_Pascal83:
7890 cu->language = language_pascal;
7893 cu->language = language_objc;
7895 case DW_LANG_Cobol74:
7896 case DW_LANG_Cobol85:
7898 cu->language = language_minimal;
7901 cu->language_defn = language_def (cu->language);
7904 /* Return the named attribute or NULL if not there. */
7906 static struct attribute *
7907 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
7910 struct attribute *spec = NULL;
7912 for (i = 0; i < die->num_attrs; ++i)
7914 if (die->attrs[i].name == name)
7915 return &die->attrs[i];
7916 if (die->attrs[i].name == DW_AT_specification
7917 || die->attrs[i].name == DW_AT_abstract_origin)
7918 spec = &die->attrs[i];
7923 die = follow_die_ref (die, spec, &cu);
7924 return dwarf2_attr (die, name, cu);
7930 /* Return the named attribute or NULL if not there,
7931 but do not follow DW_AT_specification, etc.
7932 This is for use in contexts where we're reading .debug_types dies.
7933 Following DW_AT_specification, DW_AT_abstract_origin will take us
7934 back up the chain, and we want to go down. */
7936 static struct attribute *
7937 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
7938 struct dwarf2_cu *cu)
7942 for (i = 0; i < die->num_attrs; ++i)
7943 if (die->attrs[i].name == name)
7944 return &die->attrs[i];
7949 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7950 and holds a non-zero value. This function should only be used for
7951 DW_FORM_flag or DW_FORM_flag_present attributes. */
7954 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
7956 struct attribute *attr = dwarf2_attr (die, name, cu);
7958 return (attr && DW_UNSND (attr));
7962 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
7964 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7965 which value is non-zero. However, we have to be careful with
7966 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7967 (via dwarf2_flag_true_p) follows this attribute. So we may
7968 end up accidently finding a declaration attribute that belongs
7969 to a different DIE referenced by the specification attribute,
7970 even though the given DIE does not have a declaration attribute. */
7971 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
7972 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
7975 /* Return the die giving the specification for DIE, if there is
7976 one. *SPEC_CU is the CU containing DIE on input, and the CU
7977 containing the return value on output. If there is no
7978 specification, but there is an abstract origin, that is
7981 static struct die_info *
7982 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
7984 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
7987 if (spec_attr == NULL)
7988 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
7990 if (spec_attr == NULL)
7993 return follow_die_ref (die, spec_attr, spec_cu);
7996 /* Free the line_header structure *LH, and any arrays and strings it
7999 free_line_header (struct line_header *lh)
8001 if (lh->standard_opcode_lengths)
8002 xfree (lh->standard_opcode_lengths);
8004 /* Remember that all the lh->file_names[i].name pointers are
8005 pointers into debug_line_buffer, and don't need to be freed. */
8007 xfree (lh->file_names);
8009 /* Similarly for the include directory names. */
8010 if (lh->include_dirs)
8011 xfree (lh->include_dirs);
8017 /* Add an entry to LH's include directory table. */
8019 add_include_dir (struct line_header *lh, char *include_dir)
8021 /* Grow the array if necessary. */
8022 if (lh->include_dirs_size == 0)
8024 lh->include_dirs_size = 1; /* for testing */
8025 lh->include_dirs = xmalloc (lh->include_dirs_size
8026 * sizeof (*lh->include_dirs));
8028 else if (lh->num_include_dirs >= lh->include_dirs_size)
8030 lh->include_dirs_size *= 2;
8031 lh->include_dirs = xrealloc (lh->include_dirs,
8032 (lh->include_dirs_size
8033 * sizeof (*lh->include_dirs)));
8036 lh->include_dirs[lh->num_include_dirs++] = include_dir;
8040 /* Add an entry to LH's file name table. */
8042 add_file_name (struct line_header *lh,
8044 unsigned int dir_index,
8045 unsigned int mod_time,
8046 unsigned int length)
8048 struct file_entry *fe;
8050 /* Grow the array if necessary. */
8051 if (lh->file_names_size == 0)
8053 lh->file_names_size = 1; /* for testing */
8054 lh->file_names = xmalloc (lh->file_names_size
8055 * sizeof (*lh->file_names));
8057 else if (lh->num_file_names >= lh->file_names_size)
8059 lh->file_names_size *= 2;
8060 lh->file_names = xrealloc (lh->file_names,
8061 (lh->file_names_size
8062 * sizeof (*lh->file_names)));
8065 fe = &lh->file_names[lh->num_file_names++];
8067 fe->dir_index = dir_index;
8068 fe->mod_time = mod_time;
8069 fe->length = length;
8075 /* Read the statement program header starting at OFFSET in
8076 .debug_line, according to the endianness of ABFD. Return a pointer
8077 to a struct line_header, allocated using xmalloc.
8079 NOTE: the strings in the include directory and file name tables of
8080 the returned object point into debug_line_buffer, and must not be
8082 static struct line_header *
8083 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
8084 struct dwarf2_cu *cu)
8086 struct cleanup *back_to;
8087 struct line_header *lh;
8089 unsigned int bytes_read, offset_size;
8091 char *cur_dir, *cur_file;
8093 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
8094 if (dwarf2_per_objfile->line.buffer == NULL)
8096 complaint (&symfile_complaints, _("missing .debug_line section"));
8100 /* Make sure that at least there's room for the total_length field.
8101 That could be 12 bytes long, but we're just going to fudge that. */
8102 if (offset + 4 >= dwarf2_per_objfile->line.size)
8104 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8108 lh = xmalloc (sizeof (*lh));
8109 memset (lh, 0, sizeof (*lh));
8110 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
8113 line_ptr = dwarf2_per_objfile->line.buffer + offset;
8115 /* Read in the header. */
8117 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
8118 &bytes_read, &offset_size);
8119 line_ptr += bytes_read;
8120 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
8121 + dwarf2_per_objfile->line.size))
8123 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8126 lh->statement_program_end = line_ptr + lh->total_length;
8127 lh->version = read_2_bytes (abfd, line_ptr);
8129 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
8130 line_ptr += offset_size;
8131 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
8133 if (lh->version >= 4)
8135 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
8139 lh->maximum_ops_per_instruction = 1;
8141 if (lh->maximum_ops_per_instruction == 0)
8143 lh->maximum_ops_per_instruction = 1;
8144 complaint (&symfile_complaints,
8145 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
8148 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
8150 lh->line_base = read_1_signed_byte (abfd, line_ptr);
8152 lh->line_range = read_1_byte (abfd, line_ptr);
8154 lh->opcode_base = read_1_byte (abfd, line_ptr);
8156 lh->standard_opcode_lengths
8157 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
8159 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
8160 for (i = 1; i < lh->opcode_base; ++i)
8162 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
8166 /* Read directory table. */
8167 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
8169 line_ptr += bytes_read;
8170 add_include_dir (lh, cur_dir);
8172 line_ptr += bytes_read;
8174 /* Read file name table. */
8175 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
8177 unsigned int dir_index, mod_time, length;
8179 line_ptr += bytes_read;
8180 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8181 line_ptr += bytes_read;
8182 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8183 line_ptr += bytes_read;
8184 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8185 line_ptr += bytes_read;
8187 add_file_name (lh, cur_file, dir_index, mod_time, length);
8189 line_ptr += bytes_read;
8190 lh->statement_program_start = line_ptr;
8192 if (line_ptr > (dwarf2_per_objfile->line.buffer
8193 + dwarf2_per_objfile->line.size))
8194 complaint (&symfile_complaints,
8195 _("line number info header doesn't fit in `.debug_line' section"));
8197 discard_cleanups (back_to);
8201 /* This function exists to work around a bug in certain compilers
8202 (particularly GCC 2.95), in which the first line number marker of a
8203 function does not show up until after the prologue, right before
8204 the second line number marker. This function shifts ADDRESS down
8205 to the beginning of the function if necessary, and is called on
8206 addresses passed to record_line. */
8209 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
8211 struct function_range *fn;
8213 /* Find the function_range containing address. */
8218 cu->cached_fn = cu->first_fn;
8222 if (fn->lowpc <= address && fn->highpc > address)
8228 while (fn && fn != cu->cached_fn)
8229 if (fn->lowpc <= address && fn->highpc > address)
8239 if (address != fn->lowpc)
8240 complaint (&symfile_complaints,
8241 _("misplaced first line number at 0x%lx for '%s'"),
8242 (unsigned long) address, fn->name);
8247 /* Decode the Line Number Program (LNP) for the given line_header
8248 structure and CU. The actual information extracted and the type
8249 of structures created from the LNP depends on the value of PST.
8251 1. If PST is NULL, then this procedure uses the data from the program
8252 to create all necessary symbol tables, and their linetables.
8253 The compilation directory of the file is passed in COMP_DIR,
8254 and must not be NULL.
8256 2. If PST is not NULL, this procedure reads the program to determine
8257 the list of files included by the unit represented by PST, and
8258 builds all the associated partial symbol tables. In this case,
8259 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
8260 is not used to compute the full name of the symtab, and therefore
8261 omitting it when building the partial symtab does not introduce
8262 the potential for inconsistency - a partial symtab and its associated
8263 symbtab having a different fullname -). */
8266 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
8267 struct dwarf2_cu *cu, struct partial_symtab *pst)
8269 gdb_byte *line_ptr, *extended_end;
8271 unsigned int bytes_read, extended_len;
8272 unsigned char op_code, extended_op, adj_opcode;
8274 struct objfile *objfile = cu->objfile;
8275 struct gdbarch *gdbarch = get_objfile_arch (objfile);
8276 const int decode_for_pst_p = (pst != NULL);
8277 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
8279 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8281 line_ptr = lh->statement_program_start;
8282 line_end = lh->statement_program_end;
8284 /* Read the statement sequences until there's nothing left. */
8285 while (line_ptr < line_end)
8287 /* state machine registers */
8288 CORE_ADDR address = 0;
8289 unsigned int file = 1;
8290 unsigned int line = 1;
8291 unsigned int column = 0;
8292 int is_stmt = lh->default_is_stmt;
8293 int basic_block = 0;
8294 int end_sequence = 0;
8296 unsigned char op_index = 0;
8298 if (!decode_for_pst_p && lh->num_file_names >= file)
8300 /* Start a subfile for the current file of the state machine. */
8301 /* lh->include_dirs and lh->file_names are 0-based, but the
8302 directory and file name numbers in the statement program
8304 struct file_entry *fe = &lh->file_names[file - 1];
8308 dir = lh->include_dirs[fe->dir_index - 1];
8310 dwarf2_start_subfile (fe->name, dir, comp_dir);
8313 /* Decode the table. */
8314 while (!end_sequence)
8316 op_code = read_1_byte (abfd, line_ptr);
8318 if (line_ptr > line_end)
8320 dwarf2_debug_line_missing_end_sequence_complaint ();
8324 if (op_code >= lh->opcode_base)
8326 /* Special operand. */
8327 adj_opcode = op_code - lh->opcode_base;
8328 address += (((op_index + (adj_opcode / lh->line_range))
8329 / lh->maximum_ops_per_instruction)
8330 * lh->minimum_instruction_length);
8331 op_index = ((op_index + (adj_opcode / lh->line_range))
8332 % lh->maximum_ops_per_instruction);
8333 line += lh->line_base + (adj_opcode % lh->line_range);
8334 if (lh->num_file_names < file || file == 0)
8335 dwarf2_debug_line_missing_file_complaint ();
8336 /* For now we ignore lines not starting on an
8337 instruction boundary. */
8338 else if (op_index == 0)
8340 lh->file_names[file - 1].included_p = 1;
8341 if (!decode_for_pst_p && is_stmt)
8343 if (last_subfile != current_subfile)
8345 addr = gdbarch_addr_bits_remove (gdbarch, address);
8347 record_line (last_subfile, 0, addr);
8348 last_subfile = current_subfile;
8350 /* Append row to matrix using current values. */
8351 addr = check_cu_functions (address, cu);
8352 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8353 record_line (current_subfile, line, addr);
8358 else switch (op_code)
8360 case DW_LNS_extended_op:
8361 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8362 line_ptr += bytes_read;
8363 extended_end = line_ptr + extended_len;
8364 extended_op = read_1_byte (abfd, line_ptr);
8366 switch (extended_op)
8368 case DW_LNE_end_sequence:
8371 case DW_LNE_set_address:
8372 address = read_address (abfd, line_ptr, cu, &bytes_read);
8374 line_ptr += bytes_read;
8375 address += baseaddr;
8377 case DW_LNE_define_file:
8380 unsigned int dir_index, mod_time, length;
8382 cur_file = read_string (abfd, line_ptr, &bytes_read);
8383 line_ptr += bytes_read;
8385 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8386 line_ptr += bytes_read;
8388 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8389 line_ptr += bytes_read;
8391 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8392 line_ptr += bytes_read;
8393 add_file_name (lh, cur_file, dir_index, mod_time, length);
8396 case DW_LNE_set_discriminator:
8397 /* The discriminator is not interesting to the debugger;
8399 line_ptr = extended_end;
8402 complaint (&symfile_complaints,
8403 _("mangled .debug_line section"));
8406 /* Make sure that we parsed the extended op correctly. If e.g.
8407 we expected a different address size than the producer used,
8408 we may have read the wrong number of bytes. */
8409 if (line_ptr != extended_end)
8411 complaint (&symfile_complaints,
8412 _("mangled .debug_line section"));
8417 if (lh->num_file_names < file || file == 0)
8418 dwarf2_debug_line_missing_file_complaint ();
8421 lh->file_names[file - 1].included_p = 1;
8422 if (!decode_for_pst_p && is_stmt)
8424 if (last_subfile != current_subfile)
8426 addr = gdbarch_addr_bits_remove (gdbarch, address);
8428 record_line (last_subfile, 0, addr);
8429 last_subfile = current_subfile;
8431 addr = check_cu_functions (address, cu);
8432 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8433 record_line (current_subfile, line, addr);
8438 case DW_LNS_advance_pc:
8441 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8443 address += (((op_index + adjust)
8444 / lh->maximum_ops_per_instruction)
8445 * lh->minimum_instruction_length);
8446 op_index = ((op_index + adjust)
8447 % lh->maximum_ops_per_instruction);
8448 line_ptr += bytes_read;
8451 case DW_LNS_advance_line:
8452 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
8453 line_ptr += bytes_read;
8455 case DW_LNS_set_file:
8457 /* The arrays lh->include_dirs and lh->file_names are
8458 0-based, but the directory and file name numbers in
8459 the statement program are 1-based. */
8460 struct file_entry *fe;
8463 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8464 line_ptr += bytes_read;
8465 if (lh->num_file_names < file || file == 0)
8466 dwarf2_debug_line_missing_file_complaint ();
8469 fe = &lh->file_names[file - 1];
8471 dir = lh->include_dirs[fe->dir_index - 1];
8472 if (!decode_for_pst_p)
8474 last_subfile = current_subfile;
8475 dwarf2_start_subfile (fe->name, dir, comp_dir);
8480 case DW_LNS_set_column:
8481 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8482 line_ptr += bytes_read;
8484 case DW_LNS_negate_stmt:
8485 is_stmt = (!is_stmt);
8487 case DW_LNS_set_basic_block:
8490 /* Add to the address register of the state machine the
8491 address increment value corresponding to special opcode
8492 255. I.e., this value is scaled by the minimum
8493 instruction length since special opcode 255 would have
8494 scaled the the increment. */
8495 case DW_LNS_const_add_pc:
8497 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
8499 address += (((op_index + adjust)
8500 / lh->maximum_ops_per_instruction)
8501 * lh->minimum_instruction_length);
8502 op_index = ((op_index + adjust)
8503 % lh->maximum_ops_per_instruction);
8506 case DW_LNS_fixed_advance_pc:
8507 address += read_2_bytes (abfd, line_ptr);
8513 /* Unknown standard opcode, ignore it. */
8516 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
8518 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8519 line_ptr += bytes_read;
8524 if (lh->num_file_names < file || file == 0)
8525 dwarf2_debug_line_missing_file_complaint ();
8528 lh->file_names[file - 1].included_p = 1;
8529 if (!decode_for_pst_p)
8531 addr = gdbarch_addr_bits_remove (gdbarch, address);
8532 record_line (current_subfile, 0, addr);
8537 if (decode_for_pst_p)
8541 /* Now that we're done scanning the Line Header Program, we can
8542 create the psymtab of each included file. */
8543 for (file_index = 0; file_index < lh->num_file_names; file_index++)
8544 if (lh->file_names[file_index].included_p == 1)
8546 const struct file_entry fe = lh->file_names [file_index];
8547 char *include_name = fe.name;
8548 char *dir_name = NULL;
8549 char *pst_filename = pst->filename;
8552 dir_name = lh->include_dirs[fe.dir_index - 1];
8554 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
8556 include_name = concat (dir_name, SLASH_STRING,
8557 include_name, (char *)NULL);
8558 make_cleanup (xfree, include_name);
8561 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
8563 pst_filename = concat (pst->dirname, SLASH_STRING,
8564 pst_filename, (char *)NULL);
8565 make_cleanup (xfree, pst_filename);
8568 if (strcmp (include_name, pst_filename) != 0)
8569 dwarf2_create_include_psymtab (include_name, pst, objfile);
8574 /* Make sure a symtab is created for every file, even files
8575 which contain only variables (i.e. no code with associated
8579 struct file_entry *fe;
8581 for (i = 0; i < lh->num_file_names; i++)
8585 fe = &lh->file_names[i];
8587 dir = lh->include_dirs[fe->dir_index - 1];
8588 dwarf2_start_subfile (fe->name, dir, comp_dir);
8590 /* Skip the main file; we don't need it, and it must be
8591 allocated last, so that it will show up before the
8592 non-primary symtabs in the objfile's symtab list. */
8593 if (current_subfile == first_subfile)
8596 if (current_subfile->symtab == NULL)
8597 current_subfile->symtab = allocate_symtab (current_subfile->name,
8599 fe->symtab = current_subfile->symtab;
8604 /* Start a subfile for DWARF. FILENAME is the name of the file and
8605 DIRNAME the name of the source directory which contains FILENAME
8606 or NULL if not known. COMP_DIR is the compilation directory for the
8607 linetable's compilation unit or NULL if not known.
8608 This routine tries to keep line numbers from identical absolute and
8609 relative file names in a common subfile.
8611 Using the `list' example from the GDB testsuite, which resides in
8612 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8613 of /srcdir/list0.c yields the following debugging information for list0.c:
8615 DW_AT_name: /srcdir/list0.c
8616 DW_AT_comp_dir: /compdir
8617 files.files[0].name: list0.h
8618 files.files[0].dir: /srcdir
8619 files.files[1].name: list0.c
8620 files.files[1].dir: /srcdir
8622 The line number information for list0.c has to end up in a single
8623 subfile, so that `break /srcdir/list0.c:1' works as expected.
8624 start_subfile will ensure that this happens provided that we pass the
8625 concatenation of files.files[1].dir and files.files[1].name as the
8629 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
8633 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8634 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8635 second argument to start_subfile. To be consistent, we do the
8636 same here. In order not to lose the line information directory,
8637 we concatenate it to the filename when it makes sense.
8638 Note that the Dwarf3 standard says (speaking of filenames in line
8639 information): ``The directory index is ignored for file names
8640 that represent full path names''. Thus ignoring dirname in the
8641 `else' branch below isn't an issue. */
8643 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
8644 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
8646 fullname = filename;
8648 start_subfile (fullname, comp_dir);
8650 if (fullname != filename)
8655 var_decode_location (struct attribute *attr, struct symbol *sym,
8656 struct dwarf2_cu *cu)
8658 struct objfile *objfile = cu->objfile;
8659 struct comp_unit_head *cu_header = &cu->header;
8661 /* NOTE drow/2003-01-30: There used to be a comment and some special
8662 code here to turn a symbol with DW_AT_external and a
8663 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8664 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8665 with some versions of binutils) where shared libraries could have
8666 relocations against symbols in their debug information - the
8667 minimal symbol would have the right address, but the debug info
8668 would not. It's no longer necessary, because we will explicitly
8669 apply relocations when we read in the debug information now. */
8671 /* A DW_AT_location attribute with no contents indicates that a
8672 variable has been optimized away. */
8673 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
8675 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8679 /* Handle one degenerate form of location expression specially, to
8680 preserve GDB's previous behavior when section offsets are
8681 specified. If this is just a DW_OP_addr then mark this symbol
8684 if (attr_form_is_block (attr)
8685 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
8686 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
8690 SYMBOL_VALUE_ADDRESS (sym) =
8691 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
8692 SYMBOL_CLASS (sym) = LOC_STATIC;
8693 fixup_symbol_section (sym, objfile);
8694 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
8695 SYMBOL_SECTION (sym));
8699 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8700 expression evaluator, and use LOC_COMPUTED only when necessary
8701 (i.e. when the value of a register or memory location is
8702 referenced, or a thread-local block, etc.). Then again, it might
8703 not be worthwhile. I'm assuming that it isn't unless performance
8704 or memory numbers show me otherwise. */
8706 dwarf2_symbol_mark_computed (attr, sym, cu);
8707 SYMBOL_CLASS (sym) = LOC_COMPUTED;
8710 /* Given a pointer to a DWARF information entry, figure out if we need
8711 to make a symbol table entry for it, and if so, create a new entry
8712 and return a pointer to it.
8713 If TYPE is NULL, determine symbol type from the die, otherwise
8714 used the passed type. */
8716 static struct symbol *
8717 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
8719 struct objfile *objfile = cu->objfile;
8720 struct symbol *sym = NULL;
8722 struct attribute *attr = NULL;
8723 struct attribute *attr2 = NULL;
8725 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
8727 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8729 name = dwarf2_name (die, cu);
8732 const char *linkagename;
8734 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
8735 sizeof (struct symbol));
8736 OBJSTAT (objfile, n_syms++);
8737 memset (sym, 0, sizeof (struct symbol));
8739 /* Cache this symbol's name and the name's demangled form (if any). */
8740 SYMBOL_LANGUAGE (sym) = cu->language;
8741 linkagename = dwarf2_physname (name, die, cu);
8742 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
8744 /* Fortran does not have mangling standard and the mangling does differ
8745 between gfortran, iFort etc. */
8746 if (cu->language == language_fortran
8747 && sym->ginfo.language_specific.cplus_specific.demangled_name == NULL)
8748 sym->ginfo.language_specific.cplus_specific.demangled_name
8749 = (char *) dwarf2_full_name (name, die, cu);
8751 /* Default assumptions.
8752 Use the passed type or decode it from the die. */
8753 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8754 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8756 SYMBOL_TYPE (sym) = type;
8758 SYMBOL_TYPE (sym) = die_type (die, cu);
8759 attr = dwarf2_attr (die,
8760 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
8764 SYMBOL_LINE (sym) = DW_UNSND (attr);
8767 attr = dwarf2_attr (die,
8768 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
8772 int file_index = DW_UNSND (attr);
8774 if (cu->line_header == NULL
8775 || file_index > cu->line_header->num_file_names)
8776 complaint (&symfile_complaints,
8777 _("file index out of range"));
8778 else if (file_index > 0)
8780 struct file_entry *fe;
8782 fe = &cu->line_header->file_names[file_index - 1];
8783 SYMBOL_SYMTAB (sym) = fe->symtab;
8790 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
8793 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
8795 SYMBOL_CLASS (sym) = LOC_LABEL;
8797 case DW_TAG_subprogram:
8798 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8800 SYMBOL_CLASS (sym) = LOC_BLOCK;
8801 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8802 if ((attr2 && (DW_UNSND (attr2) != 0))
8803 || cu->language == language_ada)
8805 /* Subprograms marked external are stored as a global symbol.
8806 Ada subprograms, whether marked external or not, are always
8807 stored as a global symbol, because we want to be able to
8808 access them globally. For instance, we want to be able
8809 to break on a nested subprogram without having to
8810 specify the context. */
8811 add_symbol_to_list (sym, &global_symbols);
8815 add_symbol_to_list (sym, cu->list_in_scope);
8818 case DW_TAG_inlined_subroutine:
8819 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8821 SYMBOL_CLASS (sym) = LOC_BLOCK;
8822 SYMBOL_INLINED (sym) = 1;
8823 /* Do not add the symbol to any lists. It will be found via
8824 BLOCK_FUNCTION from the blockvector. */
8826 case DW_TAG_variable:
8827 /* Compilation with minimal debug info may result in variables
8828 with missing type entries. Change the misleading `void' type
8829 to something sensible. */
8830 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
8832 = objfile_type (objfile)->nodebug_data_symbol;
8834 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8837 dwarf2_const_value (attr, sym, cu);
8838 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8839 if (attr2 && (DW_UNSND (attr2) != 0))
8840 add_symbol_to_list (sym, &global_symbols);
8842 add_symbol_to_list (sym, cu->list_in_scope);
8845 attr = dwarf2_attr (die, DW_AT_location, cu);
8848 var_decode_location (attr, sym, cu);
8849 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8850 if (attr2 && (DW_UNSND (attr2) != 0))
8852 struct pending **list_to_add;
8854 /* Workaround gfortran PR debug/40040 - it uses
8855 DW_AT_location for variables in -fPIC libraries which may
8856 get overriden by other libraries/executable and get
8857 a different address. Resolve it by the minimal symbol
8858 which may come from inferior's executable using copy
8859 relocation. Make this workaround only for gfortran as for
8860 other compilers GDB cannot guess the minimal symbol
8861 Fortran mangling kind. */
8862 if (cu->language == language_fortran && die->parent
8863 && die->parent->tag == DW_TAG_module
8865 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
8866 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8868 /* A variable with DW_AT_external is never static,
8869 but it may be block-scoped. */
8870 list_to_add = (cu->list_in_scope == &file_symbols
8871 ? &global_symbols : cu->list_in_scope);
8872 add_symbol_to_list (sym, list_to_add);
8875 add_symbol_to_list (sym, cu->list_in_scope);
8879 /* We do not know the address of this symbol.
8880 If it is an external symbol and we have type information
8881 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8882 The address of the variable will then be determined from
8883 the minimal symbol table whenever the variable is
8885 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8886 if (attr2 && (DW_UNSND (attr2) != 0)
8887 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
8889 struct pending **list_to_add;
8891 /* A variable with DW_AT_external is never static, but it
8892 may be block-scoped. */
8893 list_to_add = (cu->list_in_scope == &file_symbols
8894 ? &global_symbols : cu->list_in_scope);
8896 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8897 add_symbol_to_list (sym, list_to_add);
8899 else if (!die_is_declaration (die, cu))
8901 /* Use the default LOC_OPTIMIZED_OUT class. */
8902 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
8903 add_symbol_to_list (sym, cu->list_in_scope);
8907 case DW_TAG_formal_parameter:
8908 /* If we are inside a function, mark this as an argument. If
8909 not, we might be looking at an argument to an inlined function
8910 when we do not have enough information to show inlined frames;
8911 pretend it's a local variable in that case so that the user can
8913 if (context_stack_depth > 0
8914 && context_stack[context_stack_depth - 1].name != NULL)
8915 SYMBOL_IS_ARGUMENT (sym) = 1;
8916 attr = dwarf2_attr (die, DW_AT_location, cu);
8919 var_decode_location (attr, sym, cu);
8921 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8924 dwarf2_const_value (attr, sym, cu);
8926 attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
8927 if (attr && DW_UNSND (attr))
8929 struct type *ref_type;
8931 ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
8932 SYMBOL_TYPE (sym) = ref_type;
8935 add_symbol_to_list (sym, cu->list_in_scope);
8937 case DW_TAG_unspecified_parameters:
8938 /* From varargs functions; gdb doesn't seem to have any
8939 interest in this information, so just ignore it for now.
8942 case DW_TAG_class_type:
8943 case DW_TAG_interface_type:
8944 case DW_TAG_structure_type:
8945 case DW_TAG_union_type:
8946 case DW_TAG_set_type:
8947 case DW_TAG_enumeration_type:
8948 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8949 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
8952 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8953 really ever be static objects: otherwise, if you try
8954 to, say, break of a class's method and you're in a file
8955 which doesn't mention that class, it won't work unless
8956 the check for all static symbols in lookup_symbol_aux
8957 saves you. See the OtherFileClass tests in
8958 gdb.c++/namespace.exp. */
8960 struct pending **list_to_add;
8962 list_to_add = (cu->list_in_scope == &file_symbols
8963 && (cu->language == language_cplus
8964 || cu->language == language_java)
8965 ? &global_symbols : cu->list_in_scope);
8967 add_symbol_to_list (sym, list_to_add);
8969 /* The semantics of C++ state that "struct foo { ... }" also
8970 defines a typedef for "foo". A Java class declaration also
8971 defines a typedef for the class. */
8972 if (cu->language == language_cplus
8973 || cu->language == language_java
8974 || cu->language == language_ada)
8976 /* The symbol's name is already allocated along with
8977 this objfile, so we don't need to duplicate it for
8979 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
8980 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
8984 case DW_TAG_typedef:
8985 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8986 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8987 add_symbol_to_list (sym, cu->list_in_scope);
8989 case DW_TAG_base_type:
8990 case DW_TAG_subrange_type:
8991 case DW_TAG_const_type:
8992 case DW_TAG_volatile_type:
8993 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8994 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8995 add_symbol_to_list (sym, cu->list_in_scope);
8997 case DW_TAG_enumerator:
8998 attr = dwarf2_attr (die, DW_AT_const_value, cu);
9001 dwarf2_const_value (attr, sym, cu);
9004 /* NOTE: carlton/2003-11-10: See comment above in the
9005 DW_TAG_class_type, etc. block. */
9007 struct pending **list_to_add;
9009 list_to_add = (cu->list_in_scope == &file_symbols
9010 && (cu->language == language_cplus
9011 || cu->language == language_java)
9012 ? &global_symbols : cu->list_in_scope);
9014 add_symbol_to_list (sym, list_to_add);
9017 case DW_TAG_namespace:
9018 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
9019 add_symbol_to_list (sym, &global_symbols);
9022 /* Not a tag we recognize. Hopefully we aren't processing
9023 trash data, but since we must specifically ignore things
9024 we don't recognize, there is nothing else we should do at
9026 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
9027 dwarf_tag_name (die->tag));
9031 /* For the benefit of old versions of GCC, check for anonymous
9032 namespaces based on the demangled name. */
9033 if (!processing_has_namespace_info
9034 && cu->language == language_cplus)
9035 cp_scan_for_anonymous_namespaces (sym);
9040 /* Copy constant value from an attribute to a symbol. */
9043 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
9044 struct dwarf2_cu *cu)
9046 struct objfile *objfile = cu->objfile;
9047 struct comp_unit_head *cu_header = &cu->header;
9048 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
9049 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
9050 struct dwarf_block *blk;
9055 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
9056 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
9057 cu_header->addr_size,
9058 TYPE_LENGTH (SYMBOL_TYPE
9060 SYMBOL_VALUE_BYTES (sym) =
9061 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
9062 /* NOTE: cagney/2003-05-09: In-lined store_address call with
9063 it's body - store_unsigned_integer. */
9064 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
9065 byte_order, DW_ADDR (attr));
9066 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
9068 case DW_FORM_string:
9070 /* DW_STRING is already allocated on the obstack, point directly
9072 SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
9073 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
9075 case DW_FORM_block1:
9076 case DW_FORM_block2:
9077 case DW_FORM_block4:
9079 case DW_FORM_exprloc:
9080 blk = DW_BLOCK (attr);
9081 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
9082 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
9084 TYPE_LENGTH (SYMBOL_TYPE
9086 SYMBOL_VALUE_BYTES (sym) =
9087 obstack_alloc (&objfile->objfile_obstack, blk->size);
9088 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
9089 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
9092 /* The DW_AT_const_value attributes are supposed to carry the
9093 symbol's value "represented as it would be on the target
9094 architecture." By the time we get here, it's already been
9095 converted to host endianness, so we just need to sign- or
9096 zero-extend it as appropriate. */
9098 dwarf2_const_value_data (attr, sym, 8);
9101 dwarf2_const_value_data (attr, sym, 16);
9104 dwarf2_const_value_data (attr, sym, 32);
9107 dwarf2_const_value_data (attr, sym, 64);
9111 SYMBOL_VALUE (sym) = DW_SND (attr);
9112 SYMBOL_CLASS (sym) = LOC_CONST;
9116 SYMBOL_VALUE (sym) = DW_UNSND (attr);
9117 SYMBOL_CLASS (sym) = LOC_CONST;
9121 complaint (&symfile_complaints,
9122 _("unsupported const value attribute form: '%s'"),
9123 dwarf_form_name (attr->form));
9124 SYMBOL_VALUE (sym) = 0;
9125 SYMBOL_CLASS (sym) = LOC_CONST;
9131 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
9132 or zero-extend it as appropriate for the symbol's type. */
9134 dwarf2_const_value_data (struct attribute *attr,
9138 LONGEST l = DW_UNSND (attr);
9140 if (bits < sizeof (l) * 8)
9142 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
9143 l &= ((LONGEST) 1 << bits) - 1;
9145 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
9148 SYMBOL_VALUE (sym) = l;
9149 SYMBOL_CLASS (sym) = LOC_CONST;
9153 /* Return the type of the die in question using its DW_AT_type attribute. */
9155 static struct type *
9156 die_type (struct die_info *die, struct dwarf2_cu *cu)
9158 struct attribute *type_attr;
9159 struct die_info *type_die;
9161 type_attr = dwarf2_attr (die, DW_AT_type, cu);
9164 /* A missing DW_AT_type represents a void type. */
9165 return objfile_type (cu->objfile)->builtin_void;
9168 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
9170 return tag_type_to_type (type_die, cu);
9173 /* True iff CU's producer generates GNAT Ada auxiliary information
9174 that allows to find parallel types through that information instead
9175 of having to do expensive parallel lookups by type name. */
9178 need_gnat_info (struct dwarf2_cu *cu)
9180 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
9181 of GNAT produces this auxiliary information, without any indication
9182 that it is produced. Part of enhancing the FSF version of GNAT
9183 to produce that information will be to put in place an indicator
9184 that we can use in order to determine whether the descriptive type
9185 info is available or not. One suggestion that has been made is
9186 to use a new attribute, attached to the CU die. For now, assume
9187 that the descriptive type info is not available. */
9192 /* Return the auxiliary type of the die in question using its
9193 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
9194 attribute is not present. */
9196 static struct type *
9197 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
9199 struct attribute *type_attr;
9200 struct die_info *type_die;
9202 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
9206 type_die = follow_die_ref (die, type_attr, &cu);
9207 return tag_type_to_type (type_die, cu);
9210 /* If DIE has a descriptive_type attribute, then set the TYPE's
9211 descriptive type accordingly. */
9214 set_descriptive_type (struct type *type, struct die_info *die,
9215 struct dwarf2_cu *cu)
9217 struct type *descriptive_type = die_descriptive_type (die, cu);
9219 if (descriptive_type)
9221 ALLOCATE_GNAT_AUX_TYPE (type);
9222 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
9226 /* Return the containing type of the die in question using its
9227 DW_AT_containing_type attribute. */
9229 static struct type *
9230 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
9232 struct attribute *type_attr;
9233 struct die_info *type_die;
9235 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
9237 error (_("Dwarf Error: Problem turning containing type into gdb type "
9238 "[in module %s]"), cu->objfile->name);
9240 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
9241 return tag_type_to_type (type_die, cu);
9244 static struct type *
9245 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
9247 struct type *this_type;
9249 this_type = read_type_die (die, cu);
9252 char *message, *saved;
9254 /* read_type_die already issued a complaint. */
9255 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
9259 saved = obstack_copy0 (&cu->objfile->objfile_obstack,
9260 message, strlen (message));
9263 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
9268 static struct type *
9269 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
9271 struct type *this_type;
9273 this_type = get_die_type (die, cu);
9279 case DW_TAG_class_type:
9280 case DW_TAG_interface_type:
9281 case DW_TAG_structure_type:
9282 case DW_TAG_union_type:
9283 this_type = read_structure_type (die, cu);
9285 case DW_TAG_enumeration_type:
9286 this_type = read_enumeration_type (die, cu);
9288 case DW_TAG_subprogram:
9289 case DW_TAG_subroutine_type:
9290 case DW_TAG_inlined_subroutine:
9291 this_type = read_subroutine_type (die, cu);
9293 case DW_TAG_array_type:
9294 this_type = read_array_type (die, cu);
9296 case DW_TAG_set_type:
9297 this_type = read_set_type (die, cu);
9299 case DW_TAG_pointer_type:
9300 this_type = read_tag_pointer_type (die, cu);
9302 case DW_TAG_ptr_to_member_type:
9303 this_type = read_tag_ptr_to_member_type (die, cu);
9305 case DW_TAG_reference_type:
9306 this_type = read_tag_reference_type (die, cu);
9308 case DW_TAG_const_type:
9309 this_type = read_tag_const_type (die, cu);
9311 case DW_TAG_volatile_type:
9312 this_type = read_tag_volatile_type (die, cu);
9314 case DW_TAG_string_type:
9315 this_type = read_tag_string_type (die, cu);
9317 case DW_TAG_typedef:
9318 this_type = read_typedef (die, cu);
9320 case DW_TAG_subrange_type:
9321 this_type = read_subrange_type (die, cu);
9323 case DW_TAG_base_type:
9324 this_type = read_base_type (die, cu);
9326 case DW_TAG_unspecified_type:
9327 this_type = read_unspecified_type (die, cu);
9329 case DW_TAG_namespace:
9330 this_type = read_namespace_type (die, cu);
9333 this_type = read_module_type (die, cu);
9336 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
9337 dwarf_tag_name (die->tag));
9344 /* Return the name of the namespace/class that DIE is defined within,
9345 or "" if we can't tell. The caller should not xfree the result.
9347 For example, if we're within the method foo() in the following
9357 then determine_prefix on foo's die will return "N::C". */
9360 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
9362 struct die_info *parent, *spec_die;
9363 struct dwarf2_cu *spec_cu;
9364 struct type *parent_type;
9366 if (cu->language != language_cplus && cu->language != language_java
9367 && cu->language != language_fortran)
9370 /* We have to be careful in the presence of DW_AT_specification.
9371 For example, with GCC 3.4, given the code
9375 // Definition of N::foo.
9379 then we'll have a tree of DIEs like this:
9381 1: DW_TAG_compile_unit
9382 2: DW_TAG_namespace // N
9383 3: DW_TAG_subprogram // declaration of N::foo
9384 4: DW_TAG_subprogram // definition of N::foo
9385 DW_AT_specification // refers to die #3
9387 Thus, when processing die #4, we have to pretend that we're in
9388 the context of its DW_AT_specification, namely the contex of die
9391 spec_die = die_specification (die, &spec_cu);
9392 if (spec_die == NULL)
9393 parent = die->parent;
9396 parent = spec_die->parent;
9403 switch (parent->tag)
9405 case DW_TAG_namespace:
9406 parent_type = read_type_die (parent, cu);
9407 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9408 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9409 Work around this problem here. */
9410 if (cu->language == language_cplus
9411 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
9413 /* We give a name to even anonymous namespaces. */
9414 return TYPE_TAG_NAME (parent_type);
9415 case DW_TAG_class_type:
9416 case DW_TAG_interface_type:
9417 case DW_TAG_structure_type:
9418 case DW_TAG_union_type:
9420 parent_type = read_type_die (parent, cu);
9421 if (TYPE_TAG_NAME (parent_type) != NULL)
9422 return TYPE_TAG_NAME (parent_type);
9424 /* An anonymous structure is only allowed non-static data
9425 members; no typedefs, no member functions, et cetera.
9426 So it does not need a prefix. */
9429 return determine_prefix (parent, cu);
9433 /* Return a newly-allocated string formed by concatenating PREFIX and
9434 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9435 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9436 perform an obconcat, otherwise allocate storage for the result. The CU argument
9437 is used to determine the language and hence, the appropriate separator. */
9439 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
9442 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
9443 int physname, struct dwarf2_cu *cu)
9445 const char *lead = "";
9448 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
9450 else if (cu->language == language_java)
9452 else if (cu->language == language_fortran && physname)
9454 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
9455 DW_AT_MIPS_linkage_name is preferred and used instead. */
9470 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
9472 strcpy (retval, lead);
9473 strcat (retval, prefix);
9474 strcat (retval, sep);
9475 strcat (retval, suffix);
9480 /* We have an obstack. */
9481 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
9485 /* Return sibling of die, NULL if no sibling. */
9487 static struct die_info *
9488 sibling_die (struct die_info *die)
9490 return die->sibling;
9493 /* Get name of a die, return NULL if not found. */
9496 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
9497 struct obstack *obstack)
9499 if (name && cu->language == language_cplus)
9501 char *canon_name = cp_canonicalize_string (name);
9503 if (canon_name != NULL)
9505 if (strcmp (canon_name, name) != 0)
9506 name = obsavestring (canon_name, strlen (canon_name),
9515 /* Get name of a die, return NULL if not found. */
9518 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
9520 struct attribute *attr;
9522 attr = dwarf2_attr (die, DW_AT_name, cu);
9523 if (!attr || !DW_STRING (attr))
9528 case DW_TAG_compile_unit:
9529 /* Compilation units have a DW_AT_name that is a filename, not
9530 a source language identifier. */
9531 case DW_TAG_enumeration_type:
9532 case DW_TAG_enumerator:
9533 /* These tags always have simple identifiers already; no need
9534 to canonicalize them. */
9535 return DW_STRING (attr);
9537 case DW_TAG_subprogram:
9538 /* Java constructors will all be named "<init>", so return
9539 the class name when we see this special case. */
9540 if (cu->language == language_java
9541 && DW_STRING (attr) != NULL
9542 && strcmp (DW_STRING (attr), "<init>") == 0)
9544 struct dwarf2_cu *spec_cu = cu;
9545 struct die_info *spec_die;
9547 /* GCJ will output '<init>' for Java constructor names.
9548 For this special case, return the name of the parent class. */
9550 /* GCJ may output suprogram DIEs with AT_specification set.
9551 If so, use the name of the specified DIE. */
9552 spec_die = die_specification (die, &spec_cu);
9553 if (spec_die != NULL)
9554 return dwarf2_name (spec_die, spec_cu);
9559 if (die->tag == DW_TAG_class_type)
9560 return dwarf2_name (die, cu);
9562 while (die->tag != DW_TAG_compile_unit);
9566 case DW_TAG_class_type:
9567 case DW_TAG_interface_type:
9568 case DW_TAG_structure_type:
9569 case DW_TAG_union_type:
9570 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9571 structures or unions. These were of the form "._%d" in GCC 4.1,
9572 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9573 and GCC 4.4. We work around this problem by ignoring these. */
9574 if (strncmp (DW_STRING (attr), "._", 2) == 0
9575 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
9583 if (!DW_STRING_IS_CANONICAL (attr))
9586 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
9587 &cu->objfile->objfile_obstack);
9588 DW_STRING_IS_CANONICAL (attr) = 1;
9590 return DW_STRING (attr);
9593 /* Return the die that this die in an extension of, or NULL if there
9594 is none. *EXT_CU is the CU containing DIE on input, and the CU
9595 containing the return value on output. */
9597 static struct die_info *
9598 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
9600 struct attribute *attr;
9602 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
9606 return follow_die_ref (die, attr, ext_cu);
9609 /* Convert a DIE tag into its string name. */
9612 dwarf_tag_name (unsigned tag)
9616 case DW_TAG_padding:
9617 return "DW_TAG_padding";
9618 case DW_TAG_array_type:
9619 return "DW_TAG_array_type";
9620 case DW_TAG_class_type:
9621 return "DW_TAG_class_type";
9622 case DW_TAG_entry_point:
9623 return "DW_TAG_entry_point";
9624 case DW_TAG_enumeration_type:
9625 return "DW_TAG_enumeration_type";
9626 case DW_TAG_formal_parameter:
9627 return "DW_TAG_formal_parameter";
9628 case DW_TAG_imported_declaration:
9629 return "DW_TAG_imported_declaration";
9631 return "DW_TAG_label";
9632 case DW_TAG_lexical_block:
9633 return "DW_TAG_lexical_block";
9635 return "DW_TAG_member";
9636 case DW_TAG_pointer_type:
9637 return "DW_TAG_pointer_type";
9638 case DW_TAG_reference_type:
9639 return "DW_TAG_reference_type";
9640 case DW_TAG_compile_unit:
9641 return "DW_TAG_compile_unit";
9642 case DW_TAG_string_type:
9643 return "DW_TAG_string_type";
9644 case DW_TAG_structure_type:
9645 return "DW_TAG_structure_type";
9646 case DW_TAG_subroutine_type:
9647 return "DW_TAG_subroutine_type";
9648 case DW_TAG_typedef:
9649 return "DW_TAG_typedef";
9650 case DW_TAG_union_type:
9651 return "DW_TAG_union_type";
9652 case DW_TAG_unspecified_parameters:
9653 return "DW_TAG_unspecified_parameters";
9654 case DW_TAG_variant:
9655 return "DW_TAG_variant";
9656 case DW_TAG_common_block:
9657 return "DW_TAG_common_block";
9658 case DW_TAG_common_inclusion:
9659 return "DW_TAG_common_inclusion";
9660 case DW_TAG_inheritance:
9661 return "DW_TAG_inheritance";
9662 case DW_TAG_inlined_subroutine:
9663 return "DW_TAG_inlined_subroutine";
9665 return "DW_TAG_module";
9666 case DW_TAG_ptr_to_member_type:
9667 return "DW_TAG_ptr_to_member_type";
9668 case DW_TAG_set_type:
9669 return "DW_TAG_set_type";
9670 case DW_TAG_subrange_type:
9671 return "DW_TAG_subrange_type";
9672 case DW_TAG_with_stmt:
9673 return "DW_TAG_with_stmt";
9674 case DW_TAG_access_declaration:
9675 return "DW_TAG_access_declaration";
9676 case DW_TAG_base_type:
9677 return "DW_TAG_base_type";
9678 case DW_TAG_catch_block:
9679 return "DW_TAG_catch_block";
9680 case DW_TAG_const_type:
9681 return "DW_TAG_const_type";
9682 case DW_TAG_constant:
9683 return "DW_TAG_constant";
9684 case DW_TAG_enumerator:
9685 return "DW_TAG_enumerator";
9686 case DW_TAG_file_type:
9687 return "DW_TAG_file_type";
9689 return "DW_TAG_friend";
9690 case DW_TAG_namelist:
9691 return "DW_TAG_namelist";
9692 case DW_TAG_namelist_item:
9693 return "DW_TAG_namelist_item";
9694 case DW_TAG_packed_type:
9695 return "DW_TAG_packed_type";
9696 case DW_TAG_subprogram:
9697 return "DW_TAG_subprogram";
9698 case DW_TAG_template_type_param:
9699 return "DW_TAG_template_type_param";
9700 case DW_TAG_template_value_param:
9701 return "DW_TAG_template_value_param";
9702 case DW_TAG_thrown_type:
9703 return "DW_TAG_thrown_type";
9704 case DW_TAG_try_block:
9705 return "DW_TAG_try_block";
9706 case DW_TAG_variant_part:
9707 return "DW_TAG_variant_part";
9708 case DW_TAG_variable:
9709 return "DW_TAG_variable";
9710 case DW_TAG_volatile_type:
9711 return "DW_TAG_volatile_type";
9712 case DW_TAG_dwarf_procedure:
9713 return "DW_TAG_dwarf_procedure";
9714 case DW_TAG_restrict_type:
9715 return "DW_TAG_restrict_type";
9716 case DW_TAG_interface_type:
9717 return "DW_TAG_interface_type";
9718 case DW_TAG_namespace:
9719 return "DW_TAG_namespace";
9720 case DW_TAG_imported_module:
9721 return "DW_TAG_imported_module";
9722 case DW_TAG_unspecified_type:
9723 return "DW_TAG_unspecified_type";
9724 case DW_TAG_partial_unit:
9725 return "DW_TAG_partial_unit";
9726 case DW_TAG_imported_unit:
9727 return "DW_TAG_imported_unit";
9728 case DW_TAG_condition:
9729 return "DW_TAG_condition";
9730 case DW_TAG_shared_type:
9731 return "DW_TAG_shared_type";
9732 case DW_TAG_type_unit:
9733 return "DW_TAG_type_unit";
9734 case DW_TAG_MIPS_loop:
9735 return "DW_TAG_MIPS_loop";
9736 case DW_TAG_HP_array_descriptor:
9737 return "DW_TAG_HP_array_descriptor";
9738 case DW_TAG_format_label:
9739 return "DW_TAG_format_label";
9740 case DW_TAG_function_template:
9741 return "DW_TAG_function_template";
9742 case DW_TAG_class_template:
9743 return "DW_TAG_class_template";
9744 case DW_TAG_GNU_BINCL:
9745 return "DW_TAG_GNU_BINCL";
9746 case DW_TAG_GNU_EINCL:
9747 return "DW_TAG_GNU_EINCL";
9748 case DW_TAG_upc_shared_type:
9749 return "DW_TAG_upc_shared_type";
9750 case DW_TAG_upc_strict_type:
9751 return "DW_TAG_upc_strict_type";
9752 case DW_TAG_upc_relaxed_type:
9753 return "DW_TAG_upc_relaxed_type";
9754 case DW_TAG_PGI_kanji_type:
9755 return "DW_TAG_PGI_kanji_type";
9756 case DW_TAG_PGI_interface_block:
9757 return "DW_TAG_PGI_interface_block";
9759 return "DW_TAG_<unknown>";
9763 /* Convert a DWARF attribute code into its string name. */
9766 dwarf_attr_name (unsigned attr)
9771 return "DW_AT_sibling";
9772 case DW_AT_location:
9773 return "DW_AT_location";
9775 return "DW_AT_name";
9776 case DW_AT_ordering:
9777 return "DW_AT_ordering";
9778 case DW_AT_subscr_data:
9779 return "DW_AT_subscr_data";
9780 case DW_AT_byte_size:
9781 return "DW_AT_byte_size";
9782 case DW_AT_bit_offset:
9783 return "DW_AT_bit_offset";
9784 case DW_AT_bit_size:
9785 return "DW_AT_bit_size";
9786 case DW_AT_element_list:
9787 return "DW_AT_element_list";
9788 case DW_AT_stmt_list:
9789 return "DW_AT_stmt_list";
9791 return "DW_AT_low_pc";
9793 return "DW_AT_high_pc";
9794 case DW_AT_language:
9795 return "DW_AT_language";
9797 return "DW_AT_member";
9799 return "DW_AT_discr";
9800 case DW_AT_discr_value:
9801 return "DW_AT_discr_value";
9802 case DW_AT_visibility:
9803 return "DW_AT_visibility";
9805 return "DW_AT_import";
9806 case DW_AT_string_length:
9807 return "DW_AT_string_length";
9808 case DW_AT_common_reference:
9809 return "DW_AT_common_reference";
9810 case DW_AT_comp_dir:
9811 return "DW_AT_comp_dir";
9812 case DW_AT_const_value:
9813 return "DW_AT_const_value";
9814 case DW_AT_containing_type:
9815 return "DW_AT_containing_type";
9816 case DW_AT_default_value:
9817 return "DW_AT_default_value";
9819 return "DW_AT_inline";
9820 case DW_AT_is_optional:
9821 return "DW_AT_is_optional";
9822 case DW_AT_lower_bound:
9823 return "DW_AT_lower_bound";
9824 case DW_AT_producer:
9825 return "DW_AT_producer";
9826 case DW_AT_prototyped:
9827 return "DW_AT_prototyped";
9828 case DW_AT_return_addr:
9829 return "DW_AT_return_addr";
9830 case DW_AT_start_scope:
9831 return "DW_AT_start_scope";
9832 case DW_AT_bit_stride:
9833 return "DW_AT_bit_stride";
9834 case DW_AT_upper_bound:
9835 return "DW_AT_upper_bound";
9836 case DW_AT_abstract_origin:
9837 return "DW_AT_abstract_origin";
9838 case DW_AT_accessibility:
9839 return "DW_AT_accessibility";
9840 case DW_AT_address_class:
9841 return "DW_AT_address_class";
9842 case DW_AT_artificial:
9843 return "DW_AT_artificial";
9844 case DW_AT_base_types:
9845 return "DW_AT_base_types";
9846 case DW_AT_calling_convention:
9847 return "DW_AT_calling_convention";
9849 return "DW_AT_count";
9850 case DW_AT_data_member_location:
9851 return "DW_AT_data_member_location";
9852 case DW_AT_decl_column:
9853 return "DW_AT_decl_column";
9854 case DW_AT_decl_file:
9855 return "DW_AT_decl_file";
9856 case DW_AT_decl_line:
9857 return "DW_AT_decl_line";
9858 case DW_AT_declaration:
9859 return "DW_AT_declaration";
9860 case DW_AT_discr_list:
9861 return "DW_AT_discr_list";
9862 case DW_AT_encoding:
9863 return "DW_AT_encoding";
9864 case DW_AT_external:
9865 return "DW_AT_external";
9866 case DW_AT_frame_base:
9867 return "DW_AT_frame_base";
9869 return "DW_AT_friend";
9870 case DW_AT_identifier_case:
9871 return "DW_AT_identifier_case";
9872 case DW_AT_macro_info:
9873 return "DW_AT_macro_info";
9874 case DW_AT_namelist_items:
9875 return "DW_AT_namelist_items";
9876 case DW_AT_priority:
9877 return "DW_AT_priority";
9879 return "DW_AT_segment";
9880 case DW_AT_specification:
9881 return "DW_AT_specification";
9882 case DW_AT_static_link:
9883 return "DW_AT_static_link";
9885 return "DW_AT_type";
9886 case DW_AT_use_location:
9887 return "DW_AT_use_location";
9888 case DW_AT_variable_parameter:
9889 return "DW_AT_variable_parameter";
9890 case DW_AT_virtuality:
9891 return "DW_AT_virtuality";
9892 case DW_AT_vtable_elem_location:
9893 return "DW_AT_vtable_elem_location";
9894 /* DWARF 3 values. */
9895 case DW_AT_allocated:
9896 return "DW_AT_allocated";
9897 case DW_AT_associated:
9898 return "DW_AT_associated";
9899 case DW_AT_data_location:
9900 return "DW_AT_data_location";
9901 case DW_AT_byte_stride:
9902 return "DW_AT_byte_stride";
9903 case DW_AT_entry_pc:
9904 return "DW_AT_entry_pc";
9905 case DW_AT_use_UTF8:
9906 return "DW_AT_use_UTF8";
9907 case DW_AT_extension:
9908 return "DW_AT_extension";
9910 return "DW_AT_ranges";
9911 case DW_AT_trampoline:
9912 return "DW_AT_trampoline";
9913 case DW_AT_call_column:
9914 return "DW_AT_call_column";
9915 case DW_AT_call_file:
9916 return "DW_AT_call_file";
9917 case DW_AT_call_line:
9918 return "DW_AT_call_line";
9919 case DW_AT_description:
9920 return "DW_AT_description";
9921 case DW_AT_binary_scale:
9922 return "DW_AT_binary_scale";
9923 case DW_AT_decimal_scale:
9924 return "DW_AT_decimal_scale";
9926 return "DW_AT_small";
9927 case DW_AT_decimal_sign:
9928 return "DW_AT_decimal_sign";
9929 case DW_AT_digit_count:
9930 return "DW_AT_digit_count";
9931 case DW_AT_picture_string:
9932 return "DW_AT_picture_string";
9934 return "DW_AT_mutable";
9935 case DW_AT_threads_scaled:
9936 return "DW_AT_threads_scaled";
9937 case DW_AT_explicit:
9938 return "DW_AT_explicit";
9939 case DW_AT_object_pointer:
9940 return "DW_AT_object_pointer";
9941 case DW_AT_endianity:
9942 return "DW_AT_endianity";
9943 case DW_AT_elemental:
9944 return "DW_AT_elemental";
9946 return "DW_AT_pure";
9947 case DW_AT_recursive:
9948 return "DW_AT_recursive";
9949 /* DWARF 4 values. */
9950 case DW_AT_signature:
9951 return "DW_AT_signature";
9952 case DW_AT_linkage_name:
9953 return "DW_AT_linkage_name";
9954 /* SGI/MIPS extensions. */
9955 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9956 case DW_AT_MIPS_fde:
9957 return "DW_AT_MIPS_fde";
9959 case DW_AT_MIPS_loop_begin:
9960 return "DW_AT_MIPS_loop_begin";
9961 case DW_AT_MIPS_tail_loop_begin:
9962 return "DW_AT_MIPS_tail_loop_begin";
9963 case DW_AT_MIPS_epilog_begin:
9964 return "DW_AT_MIPS_epilog_begin";
9965 case DW_AT_MIPS_loop_unroll_factor:
9966 return "DW_AT_MIPS_loop_unroll_factor";
9967 case DW_AT_MIPS_software_pipeline_depth:
9968 return "DW_AT_MIPS_software_pipeline_depth";
9969 case DW_AT_MIPS_linkage_name:
9970 return "DW_AT_MIPS_linkage_name";
9971 case DW_AT_MIPS_stride:
9972 return "DW_AT_MIPS_stride";
9973 case DW_AT_MIPS_abstract_name:
9974 return "DW_AT_MIPS_abstract_name";
9975 case DW_AT_MIPS_clone_origin:
9976 return "DW_AT_MIPS_clone_origin";
9977 case DW_AT_MIPS_has_inlines:
9978 return "DW_AT_MIPS_has_inlines";
9979 /* HP extensions. */
9980 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9981 case DW_AT_HP_block_index:
9982 return "DW_AT_HP_block_index";
9984 case DW_AT_HP_unmodifiable:
9985 return "DW_AT_HP_unmodifiable";
9986 case DW_AT_HP_actuals_stmt_list:
9987 return "DW_AT_HP_actuals_stmt_list";
9988 case DW_AT_HP_proc_per_section:
9989 return "DW_AT_HP_proc_per_section";
9990 case DW_AT_HP_raw_data_ptr:
9991 return "DW_AT_HP_raw_data_ptr";
9992 case DW_AT_HP_pass_by_reference:
9993 return "DW_AT_HP_pass_by_reference";
9994 case DW_AT_HP_opt_level:
9995 return "DW_AT_HP_opt_level";
9996 case DW_AT_HP_prof_version_id:
9997 return "DW_AT_HP_prof_version_id";
9998 case DW_AT_HP_opt_flags:
9999 return "DW_AT_HP_opt_flags";
10000 case DW_AT_HP_cold_region_low_pc:
10001 return "DW_AT_HP_cold_region_low_pc";
10002 case DW_AT_HP_cold_region_high_pc:
10003 return "DW_AT_HP_cold_region_high_pc";
10004 case DW_AT_HP_all_variables_modifiable:
10005 return "DW_AT_HP_all_variables_modifiable";
10006 case DW_AT_HP_linkage_name:
10007 return "DW_AT_HP_linkage_name";
10008 case DW_AT_HP_prof_flags:
10009 return "DW_AT_HP_prof_flags";
10010 /* GNU extensions. */
10011 case DW_AT_sf_names:
10012 return "DW_AT_sf_names";
10013 case DW_AT_src_info:
10014 return "DW_AT_src_info";
10015 case DW_AT_mac_info:
10016 return "DW_AT_mac_info";
10017 case DW_AT_src_coords:
10018 return "DW_AT_src_coords";
10019 case DW_AT_body_begin:
10020 return "DW_AT_body_begin";
10021 case DW_AT_body_end:
10022 return "DW_AT_body_end";
10023 case DW_AT_GNU_vector:
10024 return "DW_AT_GNU_vector";
10025 /* VMS extensions. */
10026 case DW_AT_VMS_rtnbeg_pd_address:
10027 return "DW_AT_VMS_rtnbeg_pd_address";
10028 /* UPC extension. */
10029 case DW_AT_upc_threads_scaled:
10030 return "DW_AT_upc_threads_scaled";
10031 /* PGI (STMicroelectronics) extensions. */
10032 case DW_AT_PGI_lbase:
10033 return "DW_AT_PGI_lbase";
10034 case DW_AT_PGI_soffset:
10035 return "DW_AT_PGI_soffset";
10036 case DW_AT_PGI_lstride:
10037 return "DW_AT_PGI_lstride";
10039 return "DW_AT_<unknown>";
10043 /* Convert a DWARF value form code into its string name. */
10046 dwarf_form_name (unsigned form)
10051 return "DW_FORM_addr";
10052 case DW_FORM_block2:
10053 return "DW_FORM_block2";
10054 case DW_FORM_block4:
10055 return "DW_FORM_block4";
10056 case DW_FORM_data2:
10057 return "DW_FORM_data2";
10058 case DW_FORM_data4:
10059 return "DW_FORM_data4";
10060 case DW_FORM_data8:
10061 return "DW_FORM_data8";
10062 case DW_FORM_string:
10063 return "DW_FORM_string";
10064 case DW_FORM_block:
10065 return "DW_FORM_block";
10066 case DW_FORM_block1:
10067 return "DW_FORM_block1";
10068 case DW_FORM_data1:
10069 return "DW_FORM_data1";
10071 return "DW_FORM_flag";
10072 case DW_FORM_sdata:
10073 return "DW_FORM_sdata";
10075 return "DW_FORM_strp";
10076 case DW_FORM_udata:
10077 return "DW_FORM_udata";
10078 case DW_FORM_ref_addr:
10079 return "DW_FORM_ref_addr";
10081 return "DW_FORM_ref1";
10083 return "DW_FORM_ref2";
10085 return "DW_FORM_ref4";
10087 return "DW_FORM_ref8";
10088 case DW_FORM_ref_udata:
10089 return "DW_FORM_ref_udata";
10090 case DW_FORM_indirect:
10091 return "DW_FORM_indirect";
10092 case DW_FORM_sec_offset:
10093 return "DW_FORM_sec_offset";
10094 case DW_FORM_exprloc:
10095 return "DW_FORM_exprloc";
10096 case DW_FORM_flag_present:
10097 return "DW_FORM_flag_present";
10099 return "DW_FORM_sig8";
10101 return "DW_FORM_<unknown>";
10105 /* Convert a DWARF stack opcode into its string name. */
10108 dwarf_stack_op_name (unsigned op, int def)
10113 return "DW_OP_addr";
10115 return "DW_OP_deref";
10116 case DW_OP_const1u:
10117 return "DW_OP_const1u";
10118 case DW_OP_const1s:
10119 return "DW_OP_const1s";
10120 case DW_OP_const2u:
10121 return "DW_OP_const2u";
10122 case DW_OP_const2s:
10123 return "DW_OP_const2s";
10124 case DW_OP_const4u:
10125 return "DW_OP_const4u";
10126 case DW_OP_const4s:
10127 return "DW_OP_const4s";
10128 case DW_OP_const8u:
10129 return "DW_OP_const8u";
10130 case DW_OP_const8s:
10131 return "DW_OP_const8s";
10133 return "DW_OP_constu";
10135 return "DW_OP_consts";
10137 return "DW_OP_dup";
10139 return "DW_OP_drop";
10141 return "DW_OP_over";
10143 return "DW_OP_pick";
10145 return "DW_OP_swap";
10147 return "DW_OP_rot";
10149 return "DW_OP_xderef";
10151 return "DW_OP_abs";
10153 return "DW_OP_and";
10155 return "DW_OP_div";
10157 return "DW_OP_minus";
10159 return "DW_OP_mod";
10161 return "DW_OP_mul";
10163 return "DW_OP_neg";
10165 return "DW_OP_not";
10169 return "DW_OP_plus";
10170 case DW_OP_plus_uconst:
10171 return "DW_OP_plus_uconst";
10173 return "DW_OP_shl";
10175 return "DW_OP_shr";
10177 return "DW_OP_shra";
10179 return "DW_OP_xor";
10181 return "DW_OP_bra";
10195 return "DW_OP_skip";
10197 return "DW_OP_lit0";
10199 return "DW_OP_lit1";
10201 return "DW_OP_lit2";
10203 return "DW_OP_lit3";
10205 return "DW_OP_lit4";
10207 return "DW_OP_lit5";
10209 return "DW_OP_lit6";
10211 return "DW_OP_lit7";
10213 return "DW_OP_lit8";
10215 return "DW_OP_lit9";
10217 return "DW_OP_lit10";
10219 return "DW_OP_lit11";
10221 return "DW_OP_lit12";
10223 return "DW_OP_lit13";
10225 return "DW_OP_lit14";
10227 return "DW_OP_lit15";
10229 return "DW_OP_lit16";
10231 return "DW_OP_lit17";
10233 return "DW_OP_lit18";
10235 return "DW_OP_lit19";
10237 return "DW_OP_lit20";
10239 return "DW_OP_lit21";
10241 return "DW_OP_lit22";
10243 return "DW_OP_lit23";
10245 return "DW_OP_lit24";
10247 return "DW_OP_lit25";
10249 return "DW_OP_lit26";
10251 return "DW_OP_lit27";
10253 return "DW_OP_lit28";
10255 return "DW_OP_lit29";
10257 return "DW_OP_lit30";
10259 return "DW_OP_lit31";
10261 return "DW_OP_reg0";
10263 return "DW_OP_reg1";
10265 return "DW_OP_reg2";
10267 return "DW_OP_reg3";
10269 return "DW_OP_reg4";
10271 return "DW_OP_reg5";
10273 return "DW_OP_reg6";
10275 return "DW_OP_reg7";
10277 return "DW_OP_reg8";
10279 return "DW_OP_reg9";
10281 return "DW_OP_reg10";
10283 return "DW_OP_reg11";
10285 return "DW_OP_reg12";
10287 return "DW_OP_reg13";
10289 return "DW_OP_reg14";
10291 return "DW_OP_reg15";
10293 return "DW_OP_reg16";
10295 return "DW_OP_reg17";
10297 return "DW_OP_reg18";
10299 return "DW_OP_reg19";
10301 return "DW_OP_reg20";
10303 return "DW_OP_reg21";
10305 return "DW_OP_reg22";
10307 return "DW_OP_reg23";
10309 return "DW_OP_reg24";
10311 return "DW_OP_reg25";
10313 return "DW_OP_reg26";
10315 return "DW_OP_reg27";
10317 return "DW_OP_reg28";
10319 return "DW_OP_reg29";
10321 return "DW_OP_reg30";
10323 return "DW_OP_reg31";
10325 return "DW_OP_breg0";
10327 return "DW_OP_breg1";
10329 return "DW_OP_breg2";
10331 return "DW_OP_breg3";
10333 return "DW_OP_breg4";
10335 return "DW_OP_breg5";
10337 return "DW_OP_breg6";
10339 return "DW_OP_breg7";
10341 return "DW_OP_breg8";
10343 return "DW_OP_breg9";
10345 return "DW_OP_breg10";
10347 return "DW_OP_breg11";
10349 return "DW_OP_breg12";
10351 return "DW_OP_breg13";
10353 return "DW_OP_breg14";
10355 return "DW_OP_breg15";
10357 return "DW_OP_breg16";
10359 return "DW_OP_breg17";
10361 return "DW_OP_breg18";
10363 return "DW_OP_breg19";
10365 return "DW_OP_breg20";
10367 return "DW_OP_breg21";
10369 return "DW_OP_breg22";
10371 return "DW_OP_breg23";
10373 return "DW_OP_breg24";
10375 return "DW_OP_breg25";
10377 return "DW_OP_breg26";
10379 return "DW_OP_breg27";
10381 return "DW_OP_breg28";
10383 return "DW_OP_breg29";
10385 return "DW_OP_breg30";
10387 return "DW_OP_breg31";
10389 return "DW_OP_regx";
10391 return "DW_OP_fbreg";
10393 return "DW_OP_bregx";
10395 return "DW_OP_piece";
10396 case DW_OP_deref_size:
10397 return "DW_OP_deref_size";
10398 case DW_OP_xderef_size:
10399 return "DW_OP_xderef_size";
10401 return "DW_OP_nop";
10402 /* DWARF 3 extensions. */
10403 case DW_OP_push_object_address:
10404 return "DW_OP_push_object_address";
10406 return "DW_OP_call2";
10408 return "DW_OP_call4";
10409 case DW_OP_call_ref:
10410 return "DW_OP_call_ref";
10411 case DW_OP_form_tls_address:
10412 return "DW_OP_form_tls_address";
10413 case DW_OP_call_frame_cfa:
10414 return "DW_OP_call_frame_cfa";
10415 case DW_OP_bit_piece:
10416 return "DW_OP_bit_piece";
10417 /* DWARF 4 extensions. */
10418 case DW_OP_implicit_value:
10419 return "DW_OP_implicit_value";
10420 case DW_OP_stack_value:
10421 return "DW_OP_stack_value";
10422 /* GNU extensions. */
10423 case DW_OP_GNU_push_tls_address:
10424 return "DW_OP_GNU_push_tls_address";
10425 case DW_OP_GNU_uninit:
10426 return "DW_OP_GNU_uninit";
10428 return def ? "OP_<unknown>" : NULL;
10433 dwarf_bool_name (unsigned mybool)
10441 /* Convert a DWARF type code into its string name. */
10444 dwarf_type_encoding_name (unsigned enc)
10449 return "DW_ATE_void";
10450 case DW_ATE_address:
10451 return "DW_ATE_address";
10452 case DW_ATE_boolean:
10453 return "DW_ATE_boolean";
10454 case DW_ATE_complex_float:
10455 return "DW_ATE_complex_float";
10457 return "DW_ATE_float";
10458 case DW_ATE_signed:
10459 return "DW_ATE_signed";
10460 case DW_ATE_signed_char:
10461 return "DW_ATE_signed_char";
10462 case DW_ATE_unsigned:
10463 return "DW_ATE_unsigned";
10464 case DW_ATE_unsigned_char:
10465 return "DW_ATE_unsigned_char";
10467 case DW_ATE_imaginary_float:
10468 return "DW_ATE_imaginary_float";
10469 case DW_ATE_packed_decimal:
10470 return "DW_ATE_packed_decimal";
10471 case DW_ATE_numeric_string:
10472 return "DW_ATE_numeric_string";
10473 case DW_ATE_edited:
10474 return "DW_ATE_edited";
10475 case DW_ATE_signed_fixed:
10476 return "DW_ATE_signed_fixed";
10477 case DW_ATE_unsigned_fixed:
10478 return "DW_ATE_unsigned_fixed";
10479 case DW_ATE_decimal_float:
10480 return "DW_ATE_decimal_float";
10483 return "DW_ATE_UTF";
10484 /* HP extensions. */
10485 case DW_ATE_HP_float80:
10486 return "DW_ATE_HP_float80";
10487 case DW_ATE_HP_complex_float80:
10488 return "DW_ATE_HP_complex_float80";
10489 case DW_ATE_HP_float128:
10490 return "DW_ATE_HP_float128";
10491 case DW_ATE_HP_complex_float128:
10492 return "DW_ATE_HP_complex_float128";
10493 case DW_ATE_HP_floathpintel:
10494 return "DW_ATE_HP_floathpintel";
10495 case DW_ATE_HP_imaginary_float80:
10496 return "DW_ATE_HP_imaginary_float80";
10497 case DW_ATE_HP_imaginary_float128:
10498 return "DW_ATE_HP_imaginary_float128";
10500 return "DW_ATE_<unknown>";
10504 /* Convert a DWARF call frame info operation to its string name. */
10508 dwarf_cfi_name (unsigned cfi_opc)
10512 case DW_CFA_advance_loc:
10513 return "DW_CFA_advance_loc";
10514 case DW_CFA_offset:
10515 return "DW_CFA_offset";
10516 case DW_CFA_restore:
10517 return "DW_CFA_restore";
10519 return "DW_CFA_nop";
10520 case DW_CFA_set_loc:
10521 return "DW_CFA_set_loc";
10522 case DW_CFA_advance_loc1:
10523 return "DW_CFA_advance_loc1";
10524 case DW_CFA_advance_loc2:
10525 return "DW_CFA_advance_loc2";
10526 case DW_CFA_advance_loc4:
10527 return "DW_CFA_advance_loc4";
10528 case DW_CFA_offset_extended:
10529 return "DW_CFA_offset_extended";
10530 case DW_CFA_restore_extended:
10531 return "DW_CFA_restore_extended";
10532 case DW_CFA_undefined:
10533 return "DW_CFA_undefined";
10534 case DW_CFA_same_value:
10535 return "DW_CFA_same_value";
10536 case DW_CFA_register:
10537 return "DW_CFA_register";
10538 case DW_CFA_remember_state:
10539 return "DW_CFA_remember_state";
10540 case DW_CFA_restore_state:
10541 return "DW_CFA_restore_state";
10542 case DW_CFA_def_cfa:
10543 return "DW_CFA_def_cfa";
10544 case DW_CFA_def_cfa_register:
10545 return "DW_CFA_def_cfa_register";
10546 case DW_CFA_def_cfa_offset:
10547 return "DW_CFA_def_cfa_offset";
10549 case DW_CFA_def_cfa_expression:
10550 return "DW_CFA_def_cfa_expression";
10551 case DW_CFA_expression:
10552 return "DW_CFA_expression";
10553 case DW_CFA_offset_extended_sf:
10554 return "DW_CFA_offset_extended_sf";
10555 case DW_CFA_def_cfa_sf:
10556 return "DW_CFA_def_cfa_sf";
10557 case DW_CFA_def_cfa_offset_sf:
10558 return "DW_CFA_def_cfa_offset_sf";
10559 case DW_CFA_val_offset:
10560 return "DW_CFA_val_offset";
10561 case DW_CFA_val_offset_sf:
10562 return "DW_CFA_val_offset_sf";
10563 case DW_CFA_val_expression:
10564 return "DW_CFA_val_expression";
10565 /* SGI/MIPS specific. */
10566 case DW_CFA_MIPS_advance_loc8:
10567 return "DW_CFA_MIPS_advance_loc8";
10568 /* GNU extensions. */
10569 case DW_CFA_GNU_window_save:
10570 return "DW_CFA_GNU_window_save";
10571 case DW_CFA_GNU_args_size:
10572 return "DW_CFA_GNU_args_size";
10573 case DW_CFA_GNU_negative_offset_extended:
10574 return "DW_CFA_GNU_negative_offset_extended";
10576 return "DW_CFA_<unknown>";
10582 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
10586 print_spaces (indent, f);
10587 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
10588 dwarf_tag_name (die->tag), die->abbrev, die->offset);
10590 if (die->parent != NULL)
10592 print_spaces (indent, f);
10593 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
10594 die->parent->offset);
10597 print_spaces (indent, f);
10598 fprintf_unfiltered (f, " has children: %s\n",
10599 dwarf_bool_name (die->child != NULL));
10601 print_spaces (indent, f);
10602 fprintf_unfiltered (f, " attributes:\n");
10604 for (i = 0; i < die->num_attrs; ++i)
10606 print_spaces (indent, f);
10607 fprintf_unfiltered (f, " %s (%s) ",
10608 dwarf_attr_name (die->attrs[i].name),
10609 dwarf_form_name (die->attrs[i].form));
10611 switch (die->attrs[i].form)
10613 case DW_FORM_ref_addr:
10615 fprintf_unfiltered (f, "address: ");
10616 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
10618 case DW_FORM_block2:
10619 case DW_FORM_block4:
10620 case DW_FORM_block:
10621 case DW_FORM_block1:
10622 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
10624 case DW_FORM_exprloc:
10625 fprintf_unfiltered (f, "expression: size %u",
10626 DW_BLOCK (&die->attrs[i])->size);
10631 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
10632 (long) (DW_ADDR (&die->attrs[i])));
10634 case DW_FORM_data1:
10635 case DW_FORM_data2:
10636 case DW_FORM_data4:
10637 case DW_FORM_data8:
10638 case DW_FORM_udata:
10639 case DW_FORM_sdata:
10640 fprintf_unfiltered (f, "constant: %s",
10641 pulongest (DW_UNSND (&die->attrs[i])));
10643 case DW_FORM_sec_offset:
10644 fprintf_unfiltered (f, "section offset: %s",
10645 pulongest (DW_UNSND (&die->attrs[i])));
10648 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
10649 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
10650 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
10652 fprintf_unfiltered (f, "signatured type, offset: unknown");
10654 case DW_FORM_string:
10656 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
10657 DW_STRING (&die->attrs[i])
10658 ? DW_STRING (&die->attrs[i]) : "",
10659 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
10662 if (DW_UNSND (&die->attrs[i]))
10663 fprintf_unfiltered (f, "flag: TRUE");
10665 fprintf_unfiltered (f, "flag: FALSE");
10667 case DW_FORM_flag_present:
10668 fprintf_unfiltered (f, "flag: TRUE");
10670 case DW_FORM_indirect:
10671 /* the reader will have reduced the indirect form to
10672 the "base form" so this form should not occur */
10673 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
10676 fprintf_unfiltered (f, "unsupported attribute form: %d.",
10677 die->attrs[i].form);
10680 fprintf_unfiltered (f, "\n");
10685 dump_die_for_error (struct die_info *die)
10687 dump_die_shallow (gdb_stderr, 0, die);
10691 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
10693 int indent = level * 4;
10695 gdb_assert (die != NULL);
10697 if (level >= max_level)
10700 dump_die_shallow (f, indent, die);
10702 if (die->child != NULL)
10704 print_spaces (indent, f);
10705 fprintf_unfiltered (f, " Children:");
10706 if (level + 1 < max_level)
10708 fprintf_unfiltered (f, "\n");
10709 dump_die_1 (f, level + 1, max_level, die->child);
10713 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
10717 if (die->sibling != NULL && level > 0)
10719 dump_die_1 (f, level, max_level, die->sibling);
10723 /* This is called from the pdie macro in gdbinit.in.
10724 It's not static so gcc will keep a copy callable from gdb. */
10727 dump_die (struct die_info *die, int max_level)
10729 dump_die_1 (gdb_stdlog, 0, max_level, die);
10733 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
10737 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
10743 is_ref_attr (struct attribute *attr)
10745 switch (attr->form)
10747 case DW_FORM_ref_addr:
10752 case DW_FORM_ref_udata:
10759 static unsigned int
10760 dwarf2_get_ref_die_offset (struct attribute *attr)
10762 if (is_ref_attr (attr))
10763 return DW_ADDR (attr);
10765 complaint (&symfile_complaints,
10766 _("unsupported die ref attribute form: '%s'"),
10767 dwarf_form_name (attr->form));
10771 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10772 * the value held by the attribute is not constant. */
10775 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
10777 if (attr->form == DW_FORM_sdata)
10778 return DW_SND (attr);
10779 else if (attr->form == DW_FORM_udata
10780 || attr->form == DW_FORM_data1
10781 || attr->form == DW_FORM_data2
10782 || attr->form == DW_FORM_data4
10783 || attr->form == DW_FORM_data8)
10784 return DW_UNSND (attr);
10787 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
10788 dwarf_form_name (attr->form));
10789 return default_value;
10793 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10794 unit and add it to our queue.
10795 The result is non-zero if PER_CU was queued, otherwise the result is zero
10796 meaning either PER_CU is already queued or it is already loaded. */
10799 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
10800 struct dwarf2_per_cu_data *per_cu)
10802 /* Mark the dependence relation so that we don't flush PER_CU
10804 dwarf2_add_dependence (this_cu, per_cu);
10806 /* If it's already on the queue, we have nothing to do. */
10807 if (per_cu->queued)
10810 /* If the compilation unit is already loaded, just mark it as
10812 if (per_cu->cu != NULL)
10814 per_cu->cu->last_used = 0;
10818 /* Add it to the queue. */
10819 queue_comp_unit (per_cu, this_cu->objfile);
10824 /* Follow reference or signature attribute ATTR of SRC_DIE.
10825 On entry *REF_CU is the CU of SRC_DIE.
10826 On exit *REF_CU is the CU of the result. */
10828 static struct die_info *
10829 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
10830 struct dwarf2_cu **ref_cu)
10832 struct die_info *die;
10834 if (is_ref_attr (attr))
10835 die = follow_die_ref (src_die, attr, ref_cu);
10836 else if (attr->form == DW_FORM_sig8)
10837 die = follow_die_sig (src_die, attr, ref_cu);
10840 dump_die_for_error (src_die);
10841 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10842 (*ref_cu)->objfile->name);
10848 /* Follow reference OFFSET.
10849 On entry *REF_CU is the CU of source DIE referencing OFFSET.
10850 On exit *REF_CU is the CU of the result. */
10852 static struct die_info *
10853 follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
10855 struct die_info temp_die;
10856 struct dwarf2_cu *target_cu, *cu = *ref_cu;
10858 gdb_assert (cu->per_cu != NULL);
10860 if (cu->per_cu->from_debug_types)
10862 /* .debug_types CUs cannot reference anything outside their CU.
10863 If they need to, they have to reference a signatured type via
10865 if (! offset_in_cu_p (&cu->header, offset))
10869 else if (! offset_in_cu_p (&cu->header, offset))
10871 struct dwarf2_per_cu_data *per_cu;
10873 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
10875 /* If necessary, add it to the queue and load its DIEs. */
10876 if (maybe_queue_comp_unit (cu, per_cu))
10877 load_full_comp_unit (per_cu, cu->objfile);
10879 target_cu = per_cu->cu;
10884 *ref_cu = target_cu;
10885 temp_die.offset = offset;
10886 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
10889 /* Follow reference attribute ATTR of SRC_DIE.
10890 On entry *REF_CU is the CU of SRC_DIE.
10891 On exit *REF_CU is the CU of the result. */
10893 static struct die_info *
10894 follow_die_ref (struct die_info *src_die, struct attribute *attr,
10895 struct dwarf2_cu **ref_cu)
10897 unsigned int offset = dwarf2_get_ref_die_offset (attr);
10898 struct dwarf2_cu *cu = *ref_cu;
10899 struct die_info *die;
10901 die = follow_die_offset (offset, ref_cu);
10903 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10904 "at 0x%x [in module %s]"),
10905 offset, src_die->offset, cu->objfile->name);
10910 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
10911 value is intended for DW_OP_call*. */
10913 struct dwarf2_locexpr_baton
10914 dwarf2_fetch_die_location_block (unsigned int offset,
10915 struct dwarf2_per_cu_data *per_cu)
10917 struct dwarf2_cu *cu = per_cu->cu;
10918 struct die_info *die;
10919 struct attribute *attr;
10920 struct dwarf2_locexpr_baton retval;
10922 die = follow_die_offset (offset, &cu);
10924 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
10925 offset, per_cu->cu->objfile->name);
10927 attr = dwarf2_attr (die, DW_AT_location, cu);
10930 /* DWARF: "If there is no such attribute, then there is no effect.". */
10932 retval.data = NULL;
10937 if (!attr_form_is_block (attr))
10938 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
10939 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
10940 offset, per_cu->cu->objfile->name);
10942 retval.data = DW_BLOCK (attr)->data;
10943 retval.size = DW_BLOCK (attr)->size;
10945 retval.per_cu = cu->per_cu;
10949 /* Follow the signature attribute ATTR in SRC_DIE.
10950 On entry *REF_CU is the CU of SRC_DIE.
10951 On exit *REF_CU is the CU of the result. */
10953 static struct die_info *
10954 follow_die_sig (struct die_info *src_die, struct attribute *attr,
10955 struct dwarf2_cu **ref_cu)
10957 struct objfile *objfile = (*ref_cu)->objfile;
10958 struct die_info temp_die;
10959 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
10960 struct dwarf2_cu *sig_cu;
10961 struct die_info *die;
10963 /* sig_type will be NULL if the signatured type is missing from
10965 if (sig_type == NULL)
10966 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10967 "at 0x%x [in module %s]"),
10968 src_die->offset, objfile->name);
10970 /* If necessary, add it to the queue and load its DIEs. */
10972 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
10973 read_signatured_type (objfile, sig_type);
10975 gdb_assert (sig_type->per_cu.cu != NULL);
10977 sig_cu = sig_type->per_cu.cu;
10978 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
10979 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
10986 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10987 "at 0x%x [in module %s]"),
10988 sig_type->type_offset, src_die->offset, objfile->name);
10991 /* Given an offset of a signatured type, return its signatured_type. */
10993 static struct signatured_type *
10994 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
10996 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
10997 unsigned int length, initial_length_size;
10998 unsigned int sig_offset;
10999 struct signatured_type find_entry, *type_sig;
11001 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
11002 sig_offset = (initial_length_size
11004 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
11005 + 1 /*address_size*/);
11006 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
11007 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
11009 /* This is only used to lookup previously recorded types.
11010 If we didn't find it, it's our bug. */
11011 gdb_assert (type_sig != NULL);
11012 gdb_assert (offset == type_sig->offset);
11017 /* Read in signatured type at OFFSET and build its CU and die(s). */
11020 read_signatured_type_at_offset (struct objfile *objfile,
11021 unsigned int offset)
11023 struct signatured_type *type_sig;
11025 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
11027 /* We have the section offset, but we need the signature to do the
11028 hash table lookup. */
11029 type_sig = lookup_signatured_type_at_offset (objfile, offset);
11031 gdb_assert (type_sig->per_cu.cu == NULL);
11033 read_signatured_type (objfile, type_sig);
11035 gdb_assert (type_sig->per_cu.cu != NULL);
11038 /* Read in a signatured type and build its CU and DIEs. */
11041 read_signatured_type (struct objfile *objfile,
11042 struct signatured_type *type_sig)
11044 gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
11045 struct die_reader_specs reader_specs;
11046 struct dwarf2_cu *cu;
11047 ULONGEST signature;
11048 struct cleanup *back_to, *free_cu_cleanup;
11049 struct attribute *attr;
11051 gdb_assert (type_sig->per_cu.cu == NULL);
11053 cu = xmalloc (sizeof (struct dwarf2_cu));
11054 memset (cu, 0, sizeof (struct dwarf2_cu));
11055 obstack_init (&cu->comp_unit_obstack);
11056 cu->objfile = objfile;
11057 type_sig->per_cu.cu = cu;
11058 cu->per_cu = &type_sig->per_cu;
11060 /* If an error occurs while loading, release our storage. */
11061 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
11063 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
11064 types_ptr, objfile->obfd);
11065 gdb_assert (signature == type_sig->signature);
11068 = htab_create_alloc_ex (cu->header.length / 12,
11072 &cu->comp_unit_obstack,
11073 hashtab_obstack_allocate,
11074 dummy_obstack_deallocate);
11076 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
11077 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
11079 init_cu_die_reader (&reader_specs, cu);
11081 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
11084 /* We try not to read any attributes in this function, because not
11085 all objfiles needed for references have been loaded yet, and symbol
11086 table processing isn't initialized. But we have to set the CU language,
11087 or we won't be able to build types correctly. */
11088 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
11090 set_cu_language (DW_UNSND (attr), cu);
11092 set_cu_language (language_minimal, cu);
11094 do_cleanups (back_to);
11096 /* We've successfully allocated this compilation unit. Let our caller
11097 clean it up when finished with it. */
11098 discard_cleanups (free_cu_cleanup);
11100 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
11101 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
11104 /* Decode simple location descriptions.
11105 Given a pointer to a dwarf block that defines a location, compute
11106 the location and return the value.
11108 NOTE drow/2003-11-18: This function is called in two situations
11109 now: for the address of static or global variables (partial symbols
11110 only) and for offsets into structures which are expected to be
11111 (more or less) constant. The partial symbol case should go away,
11112 and only the constant case should remain. That will let this
11113 function complain more accurately. A few special modes are allowed
11114 without complaint for global variables (for instance, global
11115 register values and thread-local values).
11117 A location description containing no operations indicates that the
11118 object is optimized out. The return value is 0 for that case.
11119 FIXME drow/2003-11-16: No callers check for this case any more; soon all
11120 callers will only want a very basic result and this can become a
11123 Note that stack[0] is unused except as a default error return.
11124 Note that stack overflow is not yet handled. */
11127 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
11129 struct objfile *objfile = cu->objfile;
11131 int size = blk->size;
11132 gdb_byte *data = blk->data;
11133 CORE_ADDR stack[64];
11135 unsigned int bytes_read, unsnd;
11179 stack[++stacki] = op - DW_OP_lit0;
11214 stack[++stacki] = op - DW_OP_reg0;
11216 dwarf2_complex_location_expr_complaint ();
11220 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
11222 stack[++stacki] = unsnd;
11224 dwarf2_complex_location_expr_complaint ();
11228 stack[++stacki] = read_address (objfile->obfd, &data[i],
11233 case DW_OP_const1u:
11234 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
11238 case DW_OP_const1s:
11239 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
11243 case DW_OP_const2u:
11244 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
11248 case DW_OP_const2s:
11249 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
11253 case DW_OP_const4u:
11254 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
11258 case DW_OP_const4s:
11259 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
11264 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
11270 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
11275 stack[stacki + 1] = stack[stacki];
11280 stack[stacki - 1] += stack[stacki];
11284 case DW_OP_plus_uconst:
11285 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
11290 stack[stacki - 1] -= stack[stacki];
11295 /* If we're not the last op, then we definitely can't encode
11296 this using GDB's address_class enum. This is valid for partial
11297 global symbols, although the variable's address will be bogus
11300 dwarf2_complex_location_expr_complaint ();
11303 case DW_OP_GNU_push_tls_address:
11304 /* The top of the stack has the offset from the beginning
11305 of the thread control block at which the variable is located. */
11306 /* Nothing should follow this operator, so the top of stack would
11308 /* This is valid for partial global symbols, but the variable's
11309 address will be bogus in the psymtab. */
11311 dwarf2_complex_location_expr_complaint ();
11314 case DW_OP_GNU_uninit:
11318 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
11319 dwarf_stack_op_name (op, 1));
11320 return (stack[stacki]);
11323 return (stack[stacki]);
11326 /* memory allocation interface */
11328 static struct dwarf_block *
11329 dwarf_alloc_block (struct dwarf2_cu *cu)
11331 struct dwarf_block *blk;
11333 blk = (struct dwarf_block *)
11334 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
11338 static struct abbrev_info *
11339 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
11341 struct abbrev_info *abbrev;
11343 abbrev = (struct abbrev_info *)
11344 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
11345 memset (abbrev, 0, sizeof (struct abbrev_info));
11349 static struct die_info *
11350 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
11352 struct die_info *die;
11353 size_t size = sizeof (struct die_info);
11356 size += (num_attrs - 1) * sizeof (struct attribute);
11358 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
11359 memset (die, 0, sizeof (struct die_info));
11364 /* Macro support. */
11367 /* Return the full name of file number I in *LH's file name table.
11368 Use COMP_DIR as the name of the current directory of the
11369 compilation. The result is allocated using xmalloc; the caller is
11370 responsible for freeing it. */
11372 file_full_name (int file, struct line_header *lh, const char *comp_dir)
11374 /* Is the file number a valid index into the line header's file name
11375 table? Remember that file numbers start with one, not zero. */
11376 if (1 <= file && file <= lh->num_file_names)
11378 struct file_entry *fe = &lh->file_names[file - 1];
11380 if (IS_ABSOLUTE_PATH (fe->name))
11381 return xstrdup (fe->name);
11389 dir = lh->include_dirs[fe->dir_index - 1];
11395 dir_len = strlen (dir);
11396 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
11397 strcpy (full_name, dir);
11398 full_name[dir_len] = '/';
11399 strcpy (full_name + dir_len + 1, fe->name);
11403 return xstrdup (fe->name);
11408 /* The compiler produced a bogus file number. We can at least
11409 record the macro definitions made in the file, even if we
11410 won't be able to find the file by name. */
11411 char fake_name[80];
11413 sprintf (fake_name, "<bad macro file number %d>", file);
11415 complaint (&symfile_complaints,
11416 _("bad file number in macro information (%d)"),
11419 return xstrdup (fake_name);
11424 static struct macro_source_file *
11425 macro_start_file (int file, int line,
11426 struct macro_source_file *current_file,
11427 const char *comp_dir,
11428 struct line_header *lh, struct objfile *objfile)
11430 /* The full name of this source file. */
11431 char *full_name = file_full_name (file, lh, comp_dir);
11433 /* We don't create a macro table for this compilation unit
11434 at all until we actually get a filename. */
11435 if (! pending_macros)
11436 pending_macros = new_macro_table (&objfile->objfile_obstack,
11437 objfile->macro_cache);
11439 if (! current_file)
11440 /* If we have no current file, then this must be the start_file
11441 directive for the compilation unit's main source file. */
11442 current_file = macro_set_main (pending_macros, full_name);
11444 current_file = macro_include (current_file, line, full_name);
11448 return current_file;
11452 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11453 followed by a null byte. */
11455 copy_string (const char *buf, int len)
11457 char *s = xmalloc (len + 1);
11459 memcpy (s, buf, len);
11465 static const char *
11466 consume_improper_spaces (const char *p, const char *body)
11470 complaint (&symfile_complaints,
11471 _("macro definition contains spaces in formal argument list:\n`%s'"),
11483 parse_macro_definition (struct macro_source_file *file, int line,
11488 /* The body string takes one of two forms. For object-like macro
11489 definitions, it should be:
11491 <macro name> " " <definition>
11493 For function-like macro definitions, it should be:
11495 <macro name> "() " <definition>
11497 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11499 Spaces may appear only where explicitly indicated, and in the
11502 The Dwarf 2 spec says that an object-like macro's name is always
11503 followed by a space, but versions of GCC around March 2002 omit
11504 the space when the macro's definition is the empty string.
11506 The Dwarf 2 spec says that there should be no spaces between the
11507 formal arguments in a function-like macro's formal argument list,
11508 but versions of GCC around March 2002 include spaces after the
11512 /* Find the extent of the macro name. The macro name is terminated
11513 by either a space or null character (for an object-like macro) or
11514 an opening paren (for a function-like macro). */
11515 for (p = body; *p; p++)
11516 if (*p == ' ' || *p == '(')
11519 if (*p == ' ' || *p == '\0')
11521 /* It's an object-like macro. */
11522 int name_len = p - body;
11523 char *name = copy_string (body, name_len);
11524 const char *replacement;
11527 replacement = body + name_len + 1;
11530 dwarf2_macro_malformed_definition_complaint (body);
11531 replacement = body + name_len;
11534 macro_define_object (file, line, name, replacement);
11538 else if (*p == '(')
11540 /* It's a function-like macro. */
11541 char *name = copy_string (body, p - body);
11544 char **argv = xmalloc (argv_size * sizeof (*argv));
11548 p = consume_improper_spaces (p, body);
11550 /* Parse the formal argument list. */
11551 while (*p && *p != ')')
11553 /* Find the extent of the current argument name. */
11554 const char *arg_start = p;
11556 while (*p && *p != ',' && *p != ')' && *p != ' ')
11559 if (! *p || p == arg_start)
11560 dwarf2_macro_malformed_definition_complaint (body);
11563 /* Make sure argv has room for the new argument. */
11564 if (argc >= argv_size)
11567 argv = xrealloc (argv, argv_size * sizeof (*argv));
11570 argv[argc++] = copy_string (arg_start, p - arg_start);
11573 p = consume_improper_spaces (p, body);
11575 /* Consume the comma, if present. */
11580 p = consume_improper_spaces (p, body);
11589 /* Perfectly formed definition, no complaints. */
11590 macro_define_function (file, line, name,
11591 argc, (const char **) argv,
11593 else if (*p == '\0')
11595 /* Complain, but do define it. */
11596 dwarf2_macro_malformed_definition_complaint (body);
11597 macro_define_function (file, line, name,
11598 argc, (const char **) argv,
11602 /* Just complain. */
11603 dwarf2_macro_malformed_definition_complaint (body);
11606 /* Just complain. */
11607 dwarf2_macro_malformed_definition_complaint (body);
11613 for (i = 0; i < argc; i++)
11619 dwarf2_macro_malformed_definition_complaint (body);
11624 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
11625 char *comp_dir, bfd *abfd,
11626 struct dwarf2_cu *cu)
11628 gdb_byte *mac_ptr, *mac_end;
11629 struct macro_source_file *current_file = 0;
11630 enum dwarf_macinfo_record_type macinfo_type;
11631 int at_commandline;
11633 dwarf2_read_section (dwarf2_per_objfile->objfile,
11634 &dwarf2_per_objfile->macinfo);
11635 if (dwarf2_per_objfile->macinfo.buffer == NULL)
11637 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
11641 /* First pass: Find the name of the base filename.
11642 This filename is needed in order to process all macros whose definition
11643 (or undefinition) comes from the command line. These macros are defined
11644 before the first DW_MACINFO_start_file entry, and yet still need to be
11645 associated to the base file.
11647 To determine the base file name, we scan the macro definitions until we
11648 reach the first DW_MACINFO_start_file entry. We then initialize
11649 CURRENT_FILE accordingly so that any macro definition found before the
11650 first DW_MACINFO_start_file can still be associated to the base file. */
11652 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11653 mac_end = dwarf2_per_objfile->macinfo.buffer
11654 + dwarf2_per_objfile->macinfo.size;
11658 /* Do we at least have room for a macinfo type byte? */
11659 if (mac_ptr >= mac_end)
11661 /* Complaint is printed during the second pass as GDB will probably
11662 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11666 macinfo_type = read_1_byte (abfd, mac_ptr);
11669 switch (macinfo_type)
11671 /* A zero macinfo type indicates the end of the macro
11676 case DW_MACINFO_define:
11677 case DW_MACINFO_undef:
11678 /* Only skip the data by MAC_PTR. */
11680 unsigned int bytes_read;
11682 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11683 mac_ptr += bytes_read;
11684 read_string (abfd, mac_ptr, &bytes_read);
11685 mac_ptr += bytes_read;
11689 case DW_MACINFO_start_file:
11691 unsigned int bytes_read;
11694 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11695 mac_ptr += bytes_read;
11696 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11697 mac_ptr += bytes_read;
11699 current_file = macro_start_file (file, line, current_file, comp_dir,
11704 case DW_MACINFO_end_file:
11705 /* No data to skip by MAC_PTR. */
11708 case DW_MACINFO_vendor_ext:
11709 /* Only skip the data by MAC_PTR. */
11711 unsigned int bytes_read;
11713 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11714 mac_ptr += bytes_read;
11715 read_string (abfd, mac_ptr, &bytes_read);
11716 mac_ptr += bytes_read;
11723 } while (macinfo_type != 0 && current_file == NULL);
11725 /* Second pass: Process all entries.
11727 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11728 command-line macro definitions/undefinitions. This flag is unset when we
11729 reach the first DW_MACINFO_start_file entry. */
11731 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11733 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11734 GDB is still reading the definitions from command line. First
11735 DW_MACINFO_start_file will need to be ignored as it was already executed
11736 to create CURRENT_FILE for the main source holding also the command line
11737 definitions. On first met DW_MACINFO_start_file this flag is reset to
11738 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11740 at_commandline = 1;
11744 /* Do we at least have room for a macinfo type byte? */
11745 if (mac_ptr >= mac_end)
11747 dwarf2_macros_too_long_complaint ();
11751 macinfo_type = read_1_byte (abfd, mac_ptr);
11754 switch (macinfo_type)
11756 /* A zero macinfo type indicates the end of the macro
11761 case DW_MACINFO_define:
11762 case DW_MACINFO_undef:
11764 unsigned int bytes_read;
11768 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11769 mac_ptr += bytes_read;
11770 body = read_string (abfd, mac_ptr, &bytes_read);
11771 mac_ptr += bytes_read;
11773 if (! current_file)
11775 /* DWARF violation as no main source is present. */
11776 complaint (&symfile_complaints,
11777 _("debug info with no main source gives macro %s "
11779 macinfo_type == DW_MACINFO_define ?
11781 macinfo_type == DW_MACINFO_undef ?
11782 _("undefinition") :
11783 _("something-or-other"), line, body);
11786 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11787 complaint (&symfile_complaints,
11788 _("debug info gives %s macro %s with %s line %d: %s"),
11789 at_commandline ? _("command-line") : _("in-file"),
11790 macinfo_type == DW_MACINFO_define ?
11792 macinfo_type == DW_MACINFO_undef ?
11793 _("undefinition") :
11794 _("something-or-other"),
11795 line == 0 ? _("zero") : _("non-zero"), line, body);
11797 if (macinfo_type == DW_MACINFO_define)
11798 parse_macro_definition (current_file, line, body);
11799 else if (macinfo_type == DW_MACINFO_undef)
11800 macro_undef (current_file, line, body);
11804 case DW_MACINFO_start_file:
11806 unsigned int bytes_read;
11809 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11810 mac_ptr += bytes_read;
11811 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11812 mac_ptr += bytes_read;
11814 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11815 complaint (&symfile_complaints,
11816 _("debug info gives source %d included "
11817 "from %s at %s line %d"),
11818 file, at_commandline ? _("command-line") : _("file"),
11819 line == 0 ? _("zero") : _("non-zero"), line);
11821 if (at_commandline)
11823 /* This DW_MACINFO_start_file was executed in the pass one. */
11824 at_commandline = 0;
11827 current_file = macro_start_file (file, line,
11828 current_file, comp_dir,
11833 case DW_MACINFO_end_file:
11834 if (! current_file)
11835 complaint (&symfile_complaints,
11836 _("macro debug info has an unmatched `close_file' directive"));
11839 current_file = current_file->included_by;
11840 if (! current_file)
11842 enum dwarf_macinfo_record_type next_type;
11844 /* GCC circa March 2002 doesn't produce the zero
11845 type byte marking the end of the compilation
11846 unit. Complain if it's not there, but exit no
11849 /* Do we at least have room for a macinfo type byte? */
11850 if (mac_ptr >= mac_end)
11852 dwarf2_macros_too_long_complaint ();
11856 /* We don't increment mac_ptr here, so this is just
11858 next_type = read_1_byte (abfd, mac_ptr);
11859 if (next_type != 0)
11860 complaint (&symfile_complaints,
11861 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11868 case DW_MACINFO_vendor_ext:
11870 unsigned int bytes_read;
11874 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11875 mac_ptr += bytes_read;
11876 string = read_string (abfd, mac_ptr, &bytes_read);
11877 mac_ptr += bytes_read;
11879 /* We don't recognize any vendor extensions. */
11883 } while (macinfo_type != 0);
11886 /* Check if the attribute's form is a DW_FORM_block*
11887 if so return true else false. */
11889 attr_form_is_block (struct attribute *attr)
11891 return (attr == NULL ? 0 :
11892 attr->form == DW_FORM_block1
11893 || attr->form == DW_FORM_block2
11894 || attr->form == DW_FORM_block4
11895 || attr->form == DW_FORM_block
11896 || attr->form == DW_FORM_exprloc);
11899 /* Return non-zero if ATTR's value is a section offset --- classes
11900 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11901 You may use DW_UNSND (attr) to retrieve such offsets.
11903 Section 7.5.4, "Attribute Encodings", explains that no attribute
11904 may have a value that belongs to more than one of these classes; it
11905 would be ambiguous if we did, because we use the same forms for all
11908 attr_form_is_section_offset (struct attribute *attr)
11910 return (attr->form == DW_FORM_data4
11911 || attr->form == DW_FORM_data8
11912 || attr->form == DW_FORM_sec_offset);
11916 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11917 zero otherwise. When this function returns true, you can apply
11918 dwarf2_get_attr_constant_value to it.
11920 However, note that for some attributes you must check
11921 attr_form_is_section_offset before using this test. DW_FORM_data4
11922 and DW_FORM_data8 are members of both the constant class, and of
11923 the classes that contain offsets into other debug sections
11924 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11925 that, if an attribute's can be either a constant or one of the
11926 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11927 taken as section offsets, not constants. */
11929 attr_form_is_constant (struct attribute *attr)
11931 switch (attr->form)
11933 case DW_FORM_sdata:
11934 case DW_FORM_udata:
11935 case DW_FORM_data1:
11936 case DW_FORM_data2:
11937 case DW_FORM_data4:
11938 case DW_FORM_data8:
11946 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
11947 struct dwarf2_cu *cu)
11949 if (attr_form_is_section_offset (attr)
11950 /* ".debug_loc" may not exist at all, or the offset may be outside
11951 the section. If so, fall through to the complaint in the
11953 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
11955 struct dwarf2_loclist_baton *baton;
11957 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11958 sizeof (struct dwarf2_loclist_baton));
11959 baton->per_cu = cu->per_cu;
11960 gdb_assert (baton->per_cu);
11962 dwarf2_read_section (dwarf2_per_objfile->objfile,
11963 &dwarf2_per_objfile->loc);
11965 /* We don't know how long the location list is, but make sure we
11966 don't run off the edge of the section. */
11967 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
11968 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
11969 baton->base_address = cu->base_address;
11970 if (cu->base_known == 0)
11971 complaint (&symfile_complaints,
11972 _("Location list used without specifying the CU base address."));
11974 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
11975 SYMBOL_LOCATION_BATON (sym) = baton;
11979 struct dwarf2_locexpr_baton *baton;
11981 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11982 sizeof (struct dwarf2_locexpr_baton));
11983 baton->per_cu = cu->per_cu;
11984 gdb_assert (baton->per_cu);
11986 if (attr_form_is_block (attr))
11988 /* Note that we're just copying the block's data pointer
11989 here, not the actual data. We're still pointing into the
11990 info_buffer for SYM's objfile; right now we never release
11991 that buffer, but when we do clean up properly this may
11993 baton->size = DW_BLOCK (attr)->size;
11994 baton->data = DW_BLOCK (attr)->data;
11998 dwarf2_invalid_attrib_class_complaint ("location description",
11999 SYMBOL_NATURAL_NAME (sym));
12001 baton->data = NULL;
12004 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
12005 SYMBOL_LOCATION_BATON (sym) = baton;
12009 /* Return the OBJFILE associated with the compilation unit CU. */
12012 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
12014 struct objfile *objfile = per_cu->psymtab->objfile;
12016 /* Return the master objfile, so that we can report and look up the
12017 correct file containing this variable. */
12018 if (objfile->separate_debug_objfile_backlink)
12019 objfile = objfile->separate_debug_objfile_backlink;
12024 /* Return the address size given in the compilation unit header for CU. */
12027 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
12030 return per_cu->cu->header.addr_size;
12033 /* If the CU is not currently read in, we re-read its header. */
12034 struct objfile *objfile = per_cu->psymtab->objfile;
12035 struct dwarf2_per_objfile *per_objfile
12036 = objfile_data (objfile, dwarf2_objfile_data_key);
12037 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
12038 struct comp_unit_head cu_header;
12040 memset (&cu_header, 0, sizeof cu_header);
12041 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
12042 return cu_header.addr_size;
12046 /* Return the offset size given in the compilation unit header for CU. */
12049 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
12052 return per_cu->cu->header.offset_size;
12055 /* If the CU is not currently read in, we re-read its header. */
12056 struct objfile *objfile = per_cu->psymtab->objfile;
12057 struct dwarf2_per_objfile *per_objfile
12058 = objfile_data (objfile, dwarf2_objfile_data_key);
12059 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
12060 struct comp_unit_head cu_header;
12062 memset (&cu_header, 0, sizeof cu_header);
12063 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
12064 return cu_header.offset_size;
12068 /* Locate the .debug_info compilation unit from CU's objfile which contains
12069 the DIE at OFFSET. Raises an error on failure. */
12071 static struct dwarf2_per_cu_data *
12072 dwarf2_find_containing_comp_unit (unsigned int offset,
12073 struct objfile *objfile)
12075 struct dwarf2_per_cu_data *this_cu;
12079 high = dwarf2_per_objfile->n_comp_units - 1;
12082 int mid = low + (high - low) / 2;
12084 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
12089 gdb_assert (low == high);
12090 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
12093 error (_("Dwarf Error: could not find partial DIE containing "
12094 "offset 0x%lx [in module %s]"),
12095 (long) offset, bfd_get_filename (objfile->obfd));
12097 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
12098 return dwarf2_per_objfile->all_comp_units[low-1];
12102 this_cu = dwarf2_per_objfile->all_comp_units[low];
12103 if (low == dwarf2_per_objfile->n_comp_units - 1
12104 && offset >= this_cu->offset + this_cu->length)
12105 error (_("invalid dwarf2 offset %u"), offset);
12106 gdb_assert (offset < this_cu->offset + this_cu->length);
12111 /* Locate the compilation unit from OBJFILE which is located at exactly
12112 OFFSET. Raises an error on failure. */
12114 static struct dwarf2_per_cu_data *
12115 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
12117 struct dwarf2_per_cu_data *this_cu;
12119 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
12120 if (this_cu->offset != offset)
12121 error (_("no compilation unit with offset %u."), offset);
12125 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
12127 static struct dwarf2_cu *
12128 alloc_one_comp_unit (struct objfile *objfile)
12130 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
12131 cu->objfile = objfile;
12132 obstack_init (&cu->comp_unit_obstack);
12136 /* Release one cached compilation unit, CU. We unlink it from the tree
12137 of compilation units, but we don't remove it from the read_in_chain;
12138 the caller is responsible for that.
12139 NOTE: DATA is a void * because this function is also used as a
12140 cleanup routine. */
12143 free_one_comp_unit (void *data)
12145 struct dwarf2_cu *cu = data;
12147 if (cu->per_cu != NULL)
12148 cu->per_cu->cu = NULL;
12151 obstack_free (&cu->comp_unit_obstack, NULL);
12156 /* This cleanup function is passed the address of a dwarf2_cu on the stack
12157 when we're finished with it. We can't free the pointer itself, but be
12158 sure to unlink it from the cache. Also release any associated storage
12159 and perform cache maintenance.
12161 Only used during partial symbol parsing. */
12164 free_stack_comp_unit (void *data)
12166 struct dwarf2_cu *cu = data;
12168 obstack_free (&cu->comp_unit_obstack, NULL);
12169 cu->partial_dies = NULL;
12171 if (cu->per_cu != NULL)
12173 /* This compilation unit is on the stack in our caller, so we
12174 should not xfree it. Just unlink it. */
12175 cu->per_cu->cu = NULL;
12178 /* If we had a per-cu pointer, then we may have other compilation
12179 units loaded, so age them now. */
12180 age_cached_comp_units ();
12184 /* Free all cached compilation units. */
12187 free_cached_comp_units (void *data)
12189 struct dwarf2_per_cu_data *per_cu, **last_chain;
12191 per_cu = dwarf2_per_objfile->read_in_chain;
12192 last_chain = &dwarf2_per_objfile->read_in_chain;
12193 while (per_cu != NULL)
12195 struct dwarf2_per_cu_data *next_cu;
12197 next_cu = per_cu->cu->read_in_chain;
12199 free_one_comp_unit (per_cu->cu);
12200 *last_chain = next_cu;
12206 /* Increase the age counter on each cached compilation unit, and free
12207 any that are too old. */
12210 age_cached_comp_units (void)
12212 struct dwarf2_per_cu_data *per_cu, **last_chain;
12214 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
12215 per_cu = dwarf2_per_objfile->read_in_chain;
12216 while (per_cu != NULL)
12218 per_cu->cu->last_used ++;
12219 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
12220 dwarf2_mark (per_cu->cu);
12221 per_cu = per_cu->cu->read_in_chain;
12224 per_cu = dwarf2_per_objfile->read_in_chain;
12225 last_chain = &dwarf2_per_objfile->read_in_chain;
12226 while (per_cu != NULL)
12228 struct dwarf2_per_cu_data *next_cu;
12230 next_cu = per_cu->cu->read_in_chain;
12232 if (!per_cu->cu->mark)
12234 free_one_comp_unit (per_cu->cu);
12235 *last_chain = next_cu;
12238 last_chain = &per_cu->cu->read_in_chain;
12244 /* Remove a single compilation unit from the cache. */
12247 free_one_cached_comp_unit (void *target_cu)
12249 struct dwarf2_per_cu_data *per_cu, **last_chain;
12251 per_cu = dwarf2_per_objfile->read_in_chain;
12252 last_chain = &dwarf2_per_objfile->read_in_chain;
12253 while (per_cu != NULL)
12255 struct dwarf2_per_cu_data *next_cu;
12257 next_cu = per_cu->cu->read_in_chain;
12259 if (per_cu->cu == target_cu)
12261 free_one_comp_unit (per_cu->cu);
12262 *last_chain = next_cu;
12266 last_chain = &per_cu->cu->read_in_chain;
12272 /* Release all extra memory associated with OBJFILE. */
12275 dwarf2_free_objfile (struct objfile *objfile)
12277 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
12279 if (dwarf2_per_objfile == NULL)
12282 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
12283 free_cached_comp_units (NULL);
12285 /* Everything else should be on the objfile obstack. */
12288 /* A pair of DIE offset and GDB type pointer. We store these
12289 in a hash table separate from the DIEs, and preserve them
12290 when the DIEs are flushed out of cache. */
12292 struct dwarf2_offset_and_type
12294 unsigned int offset;
12298 /* Hash function for a dwarf2_offset_and_type. */
12301 offset_and_type_hash (const void *item)
12303 const struct dwarf2_offset_and_type *ofs = item;
12305 return ofs->offset;
12308 /* Equality function for a dwarf2_offset_and_type. */
12311 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
12313 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
12314 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
12316 return ofs_lhs->offset == ofs_rhs->offset;
12319 /* Set the type associated with DIE to TYPE. Save it in CU's hash
12320 table if necessary. For convenience, return TYPE.
12322 The DIEs reading must have careful ordering to:
12323 * Not cause infite loops trying to read in DIEs as a prerequisite for
12324 reading current DIE.
12325 * Not trying to dereference contents of still incompletely read in types
12326 while reading in other DIEs.
12327 * Enable referencing still incompletely read in types just by a pointer to
12328 the type without accessing its fields.
12330 Therefore caller should follow these rules:
12331 * Try to fetch any prerequisite types we may need to build this DIE type
12332 before building the type and calling set_die_type.
12333 * After building typer call set_die_type for current DIE as soon as
12334 possible before fetching more types to complete the current type.
12335 * Make the type as complete as possible before fetching more types. */
12337 static struct type *
12338 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
12340 struct dwarf2_offset_and_type **slot, ofs;
12342 /* For Ada types, make sure that the gnat-specific data is always
12343 initialized (if not already set). There are a few types where
12344 we should not be doing so, because the type-specific area is
12345 already used to hold some other piece of info (eg: TYPE_CODE_FLT
12346 where the type-specific area is used to store the floatformat).
12347 But this is not a problem, because the gnat-specific information
12348 is actually not needed for these types. */
12349 if (need_gnat_info (cu)
12350 && TYPE_CODE (type) != TYPE_CODE_FUNC
12351 && TYPE_CODE (type) != TYPE_CODE_FLT
12352 && !HAVE_GNAT_AUX_INFO (type))
12353 INIT_GNAT_SPECIFIC (type);
12355 if (cu->type_hash == NULL)
12357 gdb_assert (cu->per_cu != NULL);
12358 cu->per_cu->type_hash
12359 = htab_create_alloc_ex (cu->header.length / 24,
12360 offset_and_type_hash,
12361 offset_and_type_eq,
12363 &cu->objfile->objfile_obstack,
12364 hashtab_obstack_allocate,
12365 dummy_obstack_deallocate);
12366 cu->type_hash = cu->per_cu->type_hash;
12369 ofs.offset = die->offset;
12371 slot = (struct dwarf2_offset_and_type **)
12372 htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
12374 complaint (&symfile_complaints,
12375 _("A problem internal to GDB: DIE 0x%x has type already set"),
12377 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
12382 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
12383 not have a saved type. */
12385 static struct type *
12386 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
12388 struct dwarf2_offset_and_type *slot, ofs;
12389 htab_t type_hash = cu->type_hash;
12391 if (type_hash == NULL)
12394 ofs.offset = die->offset;
12395 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
12402 /* Add a dependence relationship from CU to REF_PER_CU. */
12405 dwarf2_add_dependence (struct dwarf2_cu *cu,
12406 struct dwarf2_per_cu_data *ref_per_cu)
12410 if (cu->dependencies == NULL)
12412 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
12413 NULL, &cu->comp_unit_obstack,
12414 hashtab_obstack_allocate,
12415 dummy_obstack_deallocate);
12417 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
12419 *slot = ref_per_cu;
12422 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12423 Set the mark field in every compilation unit in the
12424 cache that we must keep because we are keeping CU. */
12427 dwarf2_mark_helper (void **slot, void *data)
12429 struct dwarf2_per_cu_data *per_cu;
12431 per_cu = (struct dwarf2_per_cu_data *) *slot;
12432 if (per_cu->cu->mark)
12434 per_cu->cu->mark = 1;
12436 if (per_cu->cu->dependencies != NULL)
12437 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
12442 /* Set the mark field in CU and in every other compilation unit in the
12443 cache that we must keep because we are keeping CU. */
12446 dwarf2_mark (struct dwarf2_cu *cu)
12451 if (cu->dependencies != NULL)
12452 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
12456 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
12460 per_cu->cu->mark = 0;
12461 per_cu = per_cu->cu->read_in_chain;
12465 /* Trivial hash function for partial_die_info: the hash value of a DIE
12466 is its offset in .debug_info for this objfile. */
12469 partial_die_hash (const void *item)
12471 const struct partial_die_info *part_die = item;
12473 return part_die->offset;
12476 /* Trivial comparison function for partial_die_info structures: two DIEs
12477 are equal if they have the same offset. */
12480 partial_die_eq (const void *item_lhs, const void *item_rhs)
12482 const struct partial_die_info *part_die_lhs = item_lhs;
12483 const struct partial_die_info *part_die_rhs = item_rhs;
12485 return part_die_lhs->offset == part_die_rhs->offset;
12488 static struct cmd_list_element *set_dwarf2_cmdlist;
12489 static struct cmd_list_element *show_dwarf2_cmdlist;
12492 set_dwarf2_cmd (char *args, int from_tty)
12494 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
12498 show_dwarf2_cmd (char *args, int from_tty)
12500 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
12503 /* If section described by INFO was mmapped, munmap it now. */
12506 munmap_section_buffer (struct dwarf2_section_info *info)
12508 if (info->was_mmapped)
12511 intptr_t begin = (intptr_t) info->buffer;
12512 intptr_t map_begin = begin & ~(pagesize - 1);
12513 size_t map_length = info->size + begin - map_begin;
12515 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
12517 /* Without HAVE_MMAP, we should never be here to begin with. */
12523 /* munmap debug sections for OBJFILE, if necessary. */
12526 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
12528 struct dwarf2_per_objfile *data = d;
12530 munmap_section_buffer (&data->info);
12531 munmap_section_buffer (&data->abbrev);
12532 munmap_section_buffer (&data->line);
12533 munmap_section_buffer (&data->str);
12534 munmap_section_buffer (&data->macinfo);
12535 munmap_section_buffer (&data->ranges);
12536 munmap_section_buffer (&data->loc);
12537 munmap_section_buffer (&data->frame);
12538 munmap_section_buffer (&data->eh_frame);
12541 int dwarf2_always_disassemble;
12544 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
12545 struct cmd_list_element *c, const char *value)
12547 fprintf_filtered (file, _("\
12548 Whether to always disassemble DWARF expressions is %s.\n"),
12552 void _initialize_dwarf2_read (void);
12555 _initialize_dwarf2_read (void)
12557 dwarf2_objfile_data_key
12558 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
12560 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
12561 Set DWARF 2 specific variables.\n\
12562 Configure DWARF 2 variables such as the cache size"),
12563 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
12564 0/*allow-unknown*/, &maintenance_set_cmdlist);
12566 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
12567 Show DWARF 2 specific variables\n\
12568 Show DWARF 2 variables such as the cache size"),
12569 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
12570 0/*allow-unknown*/, &maintenance_show_cmdlist);
12572 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
12573 &dwarf2_max_cache_age, _("\
12574 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12575 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12576 A higher limit means that cached compilation units will be stored\n\
12577 in memory longer, and more total memory will be used. Zero disables\n\
12578 caching, which can slow down startup."),
12580 show_dwarf2_max_cache_age,
12581 &set_dwarf2_cmdlist,
12582 &show_dwarf2_cmdlist);
12584 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
12585 &dwarf2_always_disassemble, _("\
12586 Set whether `info address' always disassembles DWARF expressions."), _("\
12587 Show whether `info address' always disassembles DWARF expressions."), _("\
12588 When enabled, DWARF expressions are always printed in an assembly-like\n\
12589 syntax. When disabled, expressions will be printed in a more\n\
12590 conversational style, when possible."),
12592 show_dwarf2_always_disassemble,
12593 &set_dwarf2_cmdlist,
12594 &show_dwarf2_cmdlist);
12596 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
12597 Set debugging of the dwarf2 DIE reader."), _("\
12598 Show debugging of the dwarf2 DIE reader."), _("\
12599 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12600 The value is the maximum depth to print."),
12603 &setdebuglist, &showdebuglist);